diff options
Diffstat (limited to 'drivers/scsi/smartpqi')
| -rw-r--r-- | drivers/scsi/smartpqi/Kconfig | 56 | ||||
| -rw-r--r-- | drivers/scsi/smartpqi/Makefile | 3 | ||||
| -rw-r--r-- | drivers/scsi/smartpqi/smartpqi.h | 1445 | ||||
| -rw-r--r-- | drivers/scsi/smartpqi/smartpqi_init.c | 9207 | ||||
| -rw-r--r-- | drivers/scsi/smartpqi/smartpqi_sas_transport.c | 564 | ||||
| -rw-r--r-- | drivers/scsi/smartpqi/smartpqi_sis.c | 438 | ||||
| -rw-r--r-- | drivers/scsi/smartpqi/smartpqi_sis.h | 31 |
7 files changed, 11744 insertions, 0 deletions
diff --git a/drivers/scsi/smartpqi/Kconfig b/drivers/scsi/smartpqi/Kconfig new file mode 100644 index 000000000..cb9e4e968 --- /dev/null +++ b/drivers/scsi/smartpqi/Kconfig @@ -0,0 +1,56 @@ +# +# Kernel configuration file for the SMARTPQI +# +# Copyright (c) 2019-2020 Microchip Technology Inc. and its subsidiaries +# Copyright (c) 2017-2018 Microsemi Corporation +# Copyright (c) 2016 Microsemi Corporation +# Copyright (c) 2016 PMC-Sierra, Inc. +# (mailto:storagedev@microchip.com) + +# This program is free software; you can redistribute it and/or +# modify it under the terms of the GNU General Public License +# as published by the Free Software Foundation; version 2 +# of the License. + +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. + +# NO WARRANTY +# THE PROGRAM IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OR +# CONDITIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED INCLUDING, WITHOUT +# LIMITATION, ANY WARRANTIES OR CONDITIONS OF TITLE, NON-INFRINGEMENT, +# MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Each Recipient is +# solely responsible for determining the appropriateness of using and +# distributing the Program and assumes all risks associated with its +# exercise of rights under this Agreement, including but not limited to +# the risks and costs of program errors, damage to or loss of data, +# programs or equipment, and unavailability or interruption of operations. + +# DISCLAIMER OF LIABILITY +# NEITHER RECIPIENT NOR ANY CONTRIBUTORS SHALL HAVE ANY LIABILITY FOR ANY +# DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL +# DAMAGES (INCLUDING WITHOUT LIMITATION LOST PROFITS), HOWEVER CAUSED AND +# ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR +# TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE +# USE OR DISTRIBUTION OF THE PROGRAM OR THE EXERCISE OF ANY RIGHTS GRANTED +# HEREUNDER, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGES + +config SCSI_SMARTPQI + tristate "Microsemi PQI Driver" + depends on PCI && SCSI && !S390 + select SCSI_SAS_ATTRS + select RAID_ATTRS + help + This driver supports Microsemi PQI controllers. + + <http://www.microsemi.com> + + To compile this driver as a module, choose M here: the + module will be called smartpqi. + + Note: the aacraid driver will not manage a smartpqi + controller. You need to enable smartpqi for smartpqi + controllers. For more information, please see + Documentation/scsi/smartpqi.rst diff --git a/drivers/scsi/smartpqi/Makefile b/drivers/scsi/smartpqi/Makefile new file mode 100644 index 000000000..28985e508 --- /dev/null +++ b/drivers/scsi/smartpqi/Makefile @@ -0,0 +1,3 @@ +# SPDX-License-Identifier: GPL-2.0 +obj-$(CONFIG_SCSI_SMARTPQI) += smartpqi.o +smartpqi-objs := smartpqi_init.o smartpqi_sis.o smartpqi_sas_transport.o diff --git a/drivers/scsi/smartpqi/smartpqi.h b/drivers/scsi/smartpqi/smartpqi.h new file mode 100644 index 000000000..3e54590e6 --- /dev/null +++ b/drivers/scsi/smartpqi/smartpqi.h @@ -0,0 +1,1445 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * driver for Microsemi PQI-based storage controllers + * Copyright (c) 2019-2020 Microchip Technology Inc. and its subsidiaries + * Copyright (c) 2016-2018 Microsemi Corporation + * Copyright (c) 2016 PMC-Sierra, Inc. + * + * Questions/Comments/Bugfixes to storagedev@microchip.com + * + */ + +#include <linux/io-64-nonatomic-lo-hi.h> + +#if !defined(_SMARTPQI_H) +#define _SMARTPQI_H + +#include <scsi/scsi_host.h> +#include <linux/bsg-lib.h> + +#pragma pack(1) + +#define PQI_DEVICE_SIGNATURE "PQI DREG" + +/* This structure is defined by the PQI specification. */ +struct pqi_device_registers { + __le64 signature; + u8 function_and_status_code; + u8 reserved[7]; + u8 max_admin_iq_elements; + u8 max_admin_oq_elements; + u8 admin_iq_element_length; /* in 16-byte units */ + u8 admin_oq_element_length; /* in 16-byte units */ + __le16 max_reset_timeout; /* in 100-millisecond units */ + u8 reserved1[2]; + __le32 legacy_intx_status; + __le32 legacy_intx_mask_set; + __le32 legacy_intx_mask_clear; + u8 reserved2[28]; + __le32 device_status; + u8 reserved3[4]; + __le64 admin_iq_pi_offset; + __le64 admin_oq_ci_offset; + __le64 admin_iq_element_array_addr; + __le64 admin_oq_element_array_addr; + __le64 admin_iq_ci_addr; + __le64 admin_oq_pi_addr; + u8 admin_iq_num_elements; + u8 admin_oq_num_elements; + __le16 admin_queue_int_msg_num; + u8 reserved4[4]; + __le32 device_error; + u8 reserved5[4]; + __le64 error_details; + __le32 device_reset; + __le32 power_action; + u8 reserved6[104]; +}; + +/* + * controller registers + * + * These are defined by the Microsemi implementation. + * + * Some registers (those named sis_*) are only used when in + * legacy SIS mode before we transition the controller into + * PQI mode. There are a number of other SIS mode registers, + * but we don't use them, so only the SIS registers that we + * care about are defined here. The offsets mentioned in the + * comments are the offsets from the PCIe BAR 0. + */ +struct pqi_ctrl_registers { + u8 reserved[0x20]; + __le32 sis_host_to_ctrl_doorbell; /* 20h */ + u8 reserved1[0x34 - (0x20 + sizeof(__le32))]; + __le32 sis_interrupt_mask; /* 34h */ + u8 reserved2[0x9c - (0x34 + sizeof(__le32))]; + __le32 sis_ctrl_to_host_doorbell; /* 9Ch */ + u8 reserved3[0xa0 - (0x9c + sizeof(__le32))]; + __le32 sis_ctrl_to_host_doorbell_clear; /* A0h */ + u8 reserved4[0xb0 - (0xa0 + sizeof(__le32))]; + __le32 sis_driver_scratch; /* B0h */ + u8 reserved5[0xbc - (0xb0 + sizeof(__le32))]; + __le32 sis_firmware_status; /* BCh */ + u8 reserved6[0x1000 - (0xbc + sizeof(__le32))]; + __le32 sis_mailbox[8]; /* 1000h */ + u8 reserved7[0x4000 - (0x1000 + (sizeof(__le32) * 8))]; + /* + * The PQI spec states that the PQI registers should be at + * offset 0 from the PCIe BAR 0. However, we can't map + * them at offset 0 because that would break compatibility + * with the SIS registers. So we map them at offset 4000h. + */ + struct pqi_device_registers pqi_registers; /* 4000h */ +}; + +#if ((HZ) < 1000) +#define PQI_HZ 1000 +#else +#define PQI_HZ (HZ) +#endif + +#define PQI_DEVICE_REGISTERS_OFFSET 0x4000 + +enum pqi_io_path { + RAID_PATH = 0, + AIO_PATH = 1 +}; + +enum pqi_irq_mode { + IRQ_MODE_NONE, + IRQ_MODE_INTX, + IRQ_MODE_MSIX +}; + +struct pqi_sg_descriptor { + __le64 address; + __le32 length; + __le32 flags; +}; + +/* manifest constants for the flags field of pqi_sg_descriptor */ +#define CISS_SG_LAST 0x40000000 +#define CISS_SG_CHAIN 0x80000000 + +struct pqi_iu_header { + u8 iu_type; + u8 reserved; + __le16 iu_length; /* in bytes - does not include the length */ + /* of this header */ + __le16 response_queue_id; /* specifies the OQ where the */ + /* response IU is to be delivered */ + u8 work_area[2]; /* reserved for driver use */ +}; + +/* + * According to the PQI spec, the IU header is only the first 4 bytes of our + * pqi_iu_header structure. + */ +#define PQI_REQUEST_HEADER_LENGTH 4 + +struct pqi_general_admin_request { + struct pqi_iu_header header; + __le16 request_id; + u8 function_code; + union { + struct { + u8 reserved[33]; + __le32 buffer_length; + struct pqi_sg_descriptor sg_descriptor; + } report_device_capability; + + struct { + u8 reserved; + __le16 queue_id; + u8 reserved1[2]; + __le64 element_array_addr; + __le64 ci_addr; + __le16 num_elements; + __le16 element_length; + u8 queue_protocol; + u8 reserved2[23]; + __le32 vendor_specific; + } create_operational_iq; + + struct { + u8 reserved; + __le16 queue_id; + u8 reserved1[2]; + __le64 element_array_addr; + __le64 pi_addr; + __le16 num_elements; + __le16 element_length; + u8 queue_protocol; + u8 reserved2[3]; + __le16 int_msg_num; + __le16 coalescing_count; + __le32 min_coalescing_time; + __le32 max_coalescing_time; + u8 reserved3[8]; + __le32 vendor_specific; + } create_operational_oq; + + struct { + u8 reserved; + __le16 queue_id; + u8 reserved1[50]; + } delete_operational_queue; + + struct { + u8 reserved; + __le16 queue_id; + u8 reserved1[46]; + __le32 vendor_specific; + } change_operational_iq_properties; + + } data; +}; + +struct pqi_general_admin_response { + struct pqi_iu_header header; + __le16 request_id; + u8 function_code; + u8 status; + union { + struct { + u8 status_descriptor[4]; + __le64 iq_pi_offset; + u8 reserved[40]; + } create_operational_iq; + + struct { + u8 status_descriptor[4]; + __le64 oq_ci_offset; + u8 reserved[40]; + } create_operational_oq; + } data; +}; + +struct pqi_iu_layer_descriptor { + u8 inbound_spanning_supported : 1; + u8 reserved : 7; + u8 reserved1[5]; + __le16 max_inbound_iu_length; + u8 outbound_spanning_supported : 1; + u8 reserved2 : 7; + u8 reserved3[5]; + __le16 max_outbound_iu_length; +}; + +struct pqi_device_capability { + __le16 data_length; + u8 reserved[6]; + u8 iq_arbitration_priority_support_bitmask; + u8 maximum_aw_a; + u8 maximum_aw_b; + u8 maximum_aw_c; + u8 max_arbitration_burst : 3; + u8 reserved1 : 4; + u8 iqa : 1; + u8 reserved2[2]; + u8 iq_freeze : 1; + u8 reserved3 : 7; + __le16 max_inbound_queues; + __le16 max_elements_per_iq; + u8 reserved4[4]; + __le16 max_iq_element_length; + __le16 min_iq_element_length; + u8 reserved5[2]; + __le16 max_outbound_queues; + __le16 max_elements_per_oq; + __le16 intr_coalescing_time_granularity; + __le16 max_oq_element_length; + __le16 min_oq_element_length; + u8 reserved6[24]; + struct pqi_iu_layer_descriptor iu_layer_descriptors[32]; +}; + +#define PQI_MAX_EMBEDDED_SG_DESCRIPTORS 4 + +struct pqi_raid_path_request { + struct pqi_iu_header header; + __le16 request_id; + __le16 nexus_id; + __le32 buffer_length; + u8 lun_number[8]; + __le16 protocol_specific; + u8 data_direction : 2; + u8 partial : 1; + u8 reserved1 : 4; + u8 fence : 1; + __le16 error_index; + u8 reserved2; + u8 task_attribute : 3; + u8 command_priority : 4; + u8 reserved3 : 1; + u8 reserved4 : 2; + u8 additional_cdb_bytes_usage : 3; + u8 reserved5 : 3; + u8 cdb[16]; + u8 reserved6[12]; + __le32 timeout; + struct pqi_sg_descriptor + sg_descriptors[PQI_MAX_EMBEDDED_SG_DESCRIPTORS]; +}; + +struct pqi_aio_path_request { + struct pqi_iu_header header; + __le16 request_id; + u8 reserved1[2]; + __le32 nexus_id; + __le32 buffer_length; + u8 data_direction : 2; + u8 partial : 1; + u8 memory_type : 1; + u8 fence : 1; + u8 encryption_enable : 1; + u8 reserved2 : 2; + u8 task_attribute : 3; + u8 command_priority : 4; + u8 reserved3 : 1; + __le16 data_encryption_key_index; + __le32 encrypt_tweak_lower; + __le32 encrypt_tweak_upper; + u8 cdb[16]; + __le16 error_index; + u8 num_sg_descriptors; + u8 cdb_length; + u8 lun_number[8]; + u8 reserved4[4]; + struct pqi_sg_descriptor + sg_descriptors[PQI_MAX_EMBEDDED_SG_DESCRIPTORS]; +}; + +struct pqi_io_response { + struct pqi_iu_header header; + __le16 request_id; + __le16 error_index; + u8 reserved2[4]; +}; + +struct pqi_general_management_request { + struct pqi_iu_header header; + __le16 request_id; + union { + struct { + u8 reserved[2]; + __le32 buffer_length; + struct pqi_sg_descriptor sg_descriptors[3]; + } report_event_configuration; + + struct { + __le16 global_event_oq_id; + __le32 buffer_length; + struct pqi_sg_descriptor sg_descriptors[3]; + } set_event_configuration; + } data; +}; + +struct pqi_event_descriptor { + u8 event_type; + u8 reserved; + __le16 oq_id; +}; + +struct pqi_event_config { + u8 reserved[2]; + u8 num_event_descriptors; + u8 reserved1; + struct pqi_event_descriptor descriptors[1]; +}; + +#define PQI_MAX_EVENT_DESCRIPTORS 255 + +#define PQI_EVENT_OFA_MEMORY_ALLOCATION 0x0 +#define PQI_EVENT_OFA_QUIESCE 0x1 +#define PQI_EVENT_OFA_CANCELLED 0x2 + +struct pqi_event_response { + struct pqi_iu_header header; + u8 event_type; + u8 reserved2 : 7; + u8 request_acknowledge : 1; + __le16 event_id; + __le32 additional_event_id; + union { + struct { + __le32 bytes_requested; + u8 reserved[12]; + } ofa_memory_allocation; + + struct { + __le16 reason; /* reason for cancellation */ + u8 reserved[14]; + } ofa_cancelled; + } data; +}; + +struct pqi_event_acknowledge_request { + struct pqi_iu_header header; + u8 event_type; + u8 reserved2; + __le16 event_id; + __le32 additional_event_id; +}; + +struct pqi_task_management_request { + struct pqi_iu_header header; + __le16 request_id; + __le16 nexus_id; + u8 reserved[2]; + __le16 timeout; + u8 lun_number[8]; + __le16 protocol_specific; + __le16 outbound_queue_id_to_manage; + __le16 request_id_to_manage; + u8 task_management_function; + u8 reserved2 : 7; + u8 fence : 1; +}; + +#define SOP_TASK_MANAGEMENT_LUN_RESET 0x8 + +struct pqi_task_management_response { + struct pqi_iu_header header; + __le16 request_id; + __le16 nexus_id; + u8 additional_response_info[3]; + u8 response_code; +}; + +struct pqi_vendor_general_request { + struct pqi_iu_header header; + __le16 request_id; + __le16 function_code; + union { + struct { + __le16 first_section; + __le16 last_section; + u8 reserved[48]; + } config_table_update; + + struct { + __le64 buffer_address; + __le32 buffer_length; + u8 reserved[40]; + } ofa_memory_allocation; + } data; +}; + +struct pqi_vendor_general_response { + struct pqi_iu_header header; + __le16 request_id; + __le16 function_code; + __le16 status; + u8 reserved[2]; +}; + +#define PQI_VENDOR_GENERAL_CONFIG_TABLE_UPDATE 0 +#define PQI_VENDOR_GENERAL_HOST_MEMORY_UPDATE 1 + +#define PQI_OFA_VERSION 1 +#define PQI_OFA_SIGNATURE "OFA_QRM" +#define PQI_OFA_MAX_SG_DESCRIPTORS 64 + +#define PQI_OFA_MEMORY_DESCRIPTOR_LENGTH \ + (offsetof(struct pqi_ofa_memory, sg_descriptor) + \ + (PQI_OFA_MAX_SG_DESCRIPTORS * sizeof(struct pqi_sg_descriptor))) + +struct pqi_ofa_memory { + __le64 signature; /* "OFA_QRM" */ + __le16 version; /* version of this struct (1 = 1st version) */ + u8 reserved[62]; + __le32 bytes_allocated; /* total allocated memory in bytes */ + __le16 num_memory_descriptors; + u8 reserved1[2]; + struct pqi_sg_descriptor sg_descriptor[1]; +}; + +struct pqi_aio_error_info { + u8 status; + u8 service_response; + u8 data_present; + u8 reserved; + __le32 residual_count; + __le16 data_length; + __le16 reserved1; + u8 data[256]; +}; + +struct pqi_raid_error_info { + u8 data_in_result; + u8 data_out_result; + u8 reserved[3]; + u8 status; + __le16 status_qualifier; + __le16 sense_data_length; + __le16 response_data_length; + __le32 data_in_transferred; + __le32 data_out_transferred; + u8 data[256]; +}; + +#define PQI_REQUEST_IU_TASK_MANAGEMENT 0x13 +#define PQI_REQUEST_IU_RAID_PATH_IO 0x14 +#define PQI_REQUEST_IU_AIO_PATH_IO 0x15 +#define PQI_REQUEST_IU_GENERAL_ADMIN 0x60 +#define PQI_REQUEST_IU_REPORT_VENDOR_EVENT_CONFIG 0x72 +#define PQI_REQUEST_IU_SET_VENDOR_EVENT_CONFIG 0x73 +#define PQI_REQUEST_IU_VENDOR_GENERAL 0x75 +#define PQI_REQUEST_IU_ACKNOWLEDGE_VENDOR_EVENT 0xf6 + +#define PQI_RESPONSE_IU_GENERAL_MANAGEMENT 0x81 +#define PQI_RESPONSE_IU_TASK_MANAGEMENT 0x93 +#define PQI_RESPONSE_IU_GENERAL_ADMIN 0xe0 +#define PQI_RESPONSE_IU_RAID_PATH_IO_SUCCESS 0xf0 +#define PQI_RESPONSE_IU_AIO_PATH_IO_SUCCESS 0xf1 +#define PQI_RESPONSE_IU_RAID_PATH_IO_ERROR 0xf2 +#define PQI_RESPONSE_IU_AIO_PATH_IO_ERROR 0xf3 +#define PQI_RESPONSE_IU_AIO_PATH_DISABLED 0xf4 +#define PQI_RESPONSE_IU_VENDOR_EVENT 0xf5 +#define PQI_RESPONSE_IU_VENDOR_GENERAL 0xf7 + +#define PQI_GENERAL_ADMIN_FUNCTION_REPORT_DEVICE_CAPABILITY 0x0 +#define PQI_GENERAL_ADMIN_FUNCTION_CREATE_IQ 0x10 +#define PQI_GENERAL_ADMIN_FUNCTION_CREATE_OQ 0x11 +#define PQI_GENERAL_ADMIN_FUNCTION_DELETE_IQ 0x12 +#define PQI_GENERAL_ADMIN_FUNCTION_DELETE_OQ 0x13 +#define PQI_GENERAL_ADMIN_FUNCTION_CHANGE_IQ_PROPERTY 0x14 + +#define PQI_GENERAL_ADMIN_STATUS_SUCCESS 0x0 + +#define PQI_IQ_PROPERTY_IS_AIO_QUEUE 0x1 + +#define PQI_GENERAL_ADMIN_IU_LENGTH 0x3c +#define PQI_PROTOCOL_SOP 0x0 + +#define PQI_DATA_IN_OUT_GOOD 0x0 +#define PQI_DATA_IN_OUT_UNDERFLOW 0x1 +#define PQI_DATA_IN_OUT_BUFFER_ERROR 0x40 +#define PQI_DATA_IN_OUT_BUFFER_OVERFLOW 0x41 +#define PQI_DATA_IN_OUT_BUFFER_OVERFLOW_DESCRIPTOR_AREA 0x42 +#define PQI_DATA_IN_OUT_BUFFER_OVERFLOW_BRIDGE 0x43 +#define PQI_DATA_IN_OUT_PCIE_FABRIC_ERROR 0x60 +#define PQI_DATA_IN_OUT_PCIE_COMPLETION_TIMEOUT 0x61 +#define PQI_DATA_IN_OUT_PCIE_COMPLETER_ABORT_RECEIVED 0x62 +#define PQI_DATA_IN_OUT_PCIE_UNSUPPORTED_REQUEST_RECEIVED 0x63 +#define PQI_DATA_IN_OUT_PCIE_ECRC_CHECK_FAILED 0x64 +#define PQI_DATA_IN_OUT_PCIE_UNSUPPORTED_REQUEST 0x65 +#define PQI_DATA_IN_OUT_PCIE_ACS_VIOLATION 0x66 +#define PQI_DATA_IN_OUT_PCIE_TLP_PREFIX_BLOCKED 0x67 +#define PQI_DATA_IN_OUT_PCIE_POISONED_MEMORY_READ 0x6F +#define PQI_DATA_IN_OUT_ERROR 0xf0 +#define PQI_DATA_IN_OUT_PROTOCOL_ERROR 0xf1 +#define PQI_DATA_IN_OUT_HARDWARE_ERROR 0xf2 +#define PQI_DATA_IN_OUT_UNSOLICITED_ABORT 0xf3 +#define PQI_DATA_IN_OUT_ABORTED 0xf4 +#define PQI_DATA_IN_OUT_TIMEOUT 0xf5 + +#define CISS_CMD_STATUS_SUCCESS 0x0 +#define CISS_CMD_STATUS_TARGET_STATUS 0x1 +#define CISS_CMD_STATUS_DATA_UNDERRUN 0x2 +#define CISS_CMD_STATUS_DATA_OVERRUN 0x3 +#define CISS_CMD_STATUS_INVALID 0x4 +#define CISS_CMD_STATUS_PROTOCOL_ERROR 0x5 +#define CISS_CMD_STATUS_HARDWARE_ERROR 0x6 +#define CISS_CMD_STATUS_CONNECTION_LOST 0x7 +#define CISS_CMD_STATUS_ABORTED 0x8 +#define CISS_CMD_STATUS_ABORT_FAILED 0x9 +#define CISS_CMD_STATUS_UNSOLICITED_ABORT 0xa +#define CISS_CMD_STATUS_TIMEOUT 0xb +#define CISS_CMD_STATUS_UNABORTABLE 0xc +#define CISS_CMD_STATUS_TMF 0xd +#define CISS_CMD_STATUS_AIO_DISABLED 0xe + +#define PQI_CMD_STATUS_ABORTED CISS_CMD_STATUS_ABORTED + +#define PQI_NUM_EVENT_QUEUE_ELEMENTS 32 +#define PQI_EVENT_OQ_ELEMENT_LENGTH sizeof(struct pqi_event_response) + +#define PQI_EVENT_TYPE_HOTPLUG 0x1 +#define PQI_EVENT_TYPE_HARDWARE 0x2 +#define PQI_EVENT_TYPE_PHYSICAL_DEVICE 0x4 +#define PQI_EVENT_TYPE_LOGICAL_DEVICE 0x5 +#define PQI_EVENT_TYPE_OFA 0xfb +#define PQI_EVENT_TYPE_AIO_STATE_CHANGE 0xfd +#define PQI_EVENT_TYPE_AIO_CONFIG_CHANGE 0xfe + +#pragma pack() + +#define PQI_ERROR_BUFFER_ELEMENT_LENGTH \ + sizeof(struct pqi_raid_error_info) + +/* these values are based on our implementation */ +#define PQI_ADMIN_IQ_NUM_ELEMENTS 8 +#define PQI_ADMIN_OQ_NUM_ELEMENTS 20 +#define PQI_ADMIN_IQ_ELEMENT_LENGTH 64 +#define PQI_ADMIN_OQ_ELEMENT_LENGTH 64 + +#define PQI_OPERATIONAL_IQ_ELEMENT_LENGTH 128 +#define PQI_OPERATIONAL_OQ_ELEMENT_LENGTH 16 + +#define PQI_MIN_MSIX_VECTORS 1 +#define PQI_MAX_MSIX_VECTORS 64 + +/* these values are defined by the PQI spec */ +#define PQI_MAX_NUM_ELEMENTS_ADMIN_QUEUE 255 +#define PQI_MAX_NUM_ELEMENTS_OPERATIONAL_QUEUE 65535 +#define PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT 64 +#define PQI_QUEUE_ELEMENT_LENGTH_ALIGNMENT 16 +#define PQI_ADMIN_INDEX_ALIGNMENT 64 +#define PQI_OPERATIONAL_INDEX_ALIGNMENT 4 + +#define PQI_MIN_OPERATIONAL_QUEUE_ID 1 +#define PQI_MAX_OPERATIONAL_QUEUE_ID 65535 + +#define PQI_AIO_SERV_RESPONSE_COMPLETE 0 +#define PQI_AIO_SERV_RESPONSE_FAILURE 1 +#define PQI_AIO_SERV_RESPONSE_TMF_COMPLETE 2 +#define PQI_AIO_SERV_RESPONSE_TMF_SUCCEEDED 3 +#define PQI_AIO_SERV_RESPONSE_TMF_REJECTED 4 +#define PQI_AIO_SERV_RESPONSE_TMF_INCORRECT_LUN 5 + +#define PQI_AIO_STATUS_IO_ERROR 0x1 +#define PQI_AIO_STATUS_IO_ABORTED 0x2 +#define PQI_AIO_STATUS_NO_PATH_TO_DEVICE 0x3 +#define PQI_AIO_STATUS_INVALID_DEVICE 0x4 +#define PQI_AIO_STATUS_AIO_PATH_DISABLED 0xe +#define PQI_AIO_STATUS_UNDERRUN 0x51 +#define PQI_AIO_STATUS_OVERRUN 0x75 + +typedef u32 pqi_index_t; + +/* SOP data direction flags */ +#define SOP_NO_DIRECTION_FLAG 0 +#define SOP_WRITE_FLAG 1 /* host writes data to Data-Out */ + /* buffer */ +#define SOP_READ_FLAG 2 /* host receives data from Data-In */ + /* buffer */ +#define SOP_BIDIRECTIONAL 3 /* data is transferred from the */ + /* Data-Out buffer and data is */ + /* transferred to the Data-In buffer */ + +#define SOP_TASK_ATTRIBUTE_SIMPLE 0 +#define SOP_TASK_ATTRIBUTE_HEAD_OF_QUEUE 1 +#define SOP_TASK_ATTRIBUTE_ORDERED 2 +#define SOP_TASK_ATTRIBUTE_ACA 4 + +#define SOP_TMF_COMPLETE 0x0 +#define SOP_TMF_REJECTED 0x4 +#define SOP_TMF_FUNCTION_SUCCEEDED 0x8 + +/* additional CDB bytes usage field codes */ +#define SOP_ADDITIONAL_CDB_BYTES_0 0 /* 16-byte CDB */ +#define SOP_ADDITIONAL_CDB_BYTES_4 1 /* 20-byte CDB */ +#define SOP_ADDITIONAL_CDB_BYTES_8 2 /* 24-byte CDB */ +#define SOP_ADDITIONAL_CDB_BYTES_12 3 /* 28-byte CDB */ +#define SOP_ADDITIONAL_CDB_BYTES_16 4 /* 32-byte CDB */ + +/* + * The purpose of this structure is to obtain proper alignment of objects in + * an admin queue pair. + */ +struct pqi_admin_queues_aligned { + __aligned(PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT) + u8 iq_element_array[PQI_ADMIN_IQ_ELEMENT_LENGTH] + [PQI_ADMIN_IQ_NUM_ELEMENTS]; + __aligned(PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT) + u8 oq_element_array[PQI_ADMIN_OQ_ELEMENT_LENGTH] + [PQI_ADMIN_OQ_NUM_ELEMENTS]; + __aligned(PQI_ADMIN_INDEX_ALIGNMENT) pqi_index_t iq_ci; + __aligned(PQI_ADMIN_INDEX_ALIGNMENT) pqi_index_t oq_pi; +}; + +struct pqi_admin_queues { + void *iq_element_array; + void *oq_element_array; + pqi_index_t *iq_ci; + pqi_index_t __iomem *oq_pi; + dma_addr_t iq_element_array_bus_addr; + dma_addr_t oq_element_array_bus_addr; + dma_addr_t iq_ci_bus_addr; + dma_addr_t oq_pi_bus_addr; + __le32 __iomem *iq_pi; + pqi_index_t iq_pi_copy; + __le32 __iomem *oq_ci; + pqi_index_t oq_ci_copy; + struct task_struct *task; + u16 int_msg_num; +}; + +struct pqi_queue_group { + struct pqi_ctrl_info *ctrl_info; /* backpointer */ + u16 iq_id[2]; + u16 oq_id; + u16 int_msg_num; + void *iq_element_array[2]; + void *oq_element_array; + dma_addr_t iq_element_array_bus_addr[2]; + dma_addr_t oq_element_array_bus_addr; + __le32 __iomem *iq_pi[2]; + pqi_index_t iq_pi_copy[2]; + pqi_index_t __iomem *iq_ci[2]; + pqi_index_t __iomem *oq_pi; + dma_addr_t iq_ci_bus_addr[2]; + dma_addr_t oq_pi_bus_addr; + __le32 __iomem *oq_ci; + pqi_index_t oq_ci_copy; + spinlock_t submit_lock[2]; /* protect submission queue */ + struct list_head request_list[2]; +}; + +struct pqi_event_queue { + u16 oq_id; + u16 int_msg_num; + void *oq_element_array; + pqi_index_t __iomem *oq_pi; + dma_addr_t oq_element_array_bus_addr; + dma_addr_t oq_pi_bus_addr; + __le32 __iomem *oq_ci; + pqi_index_t oq_ci_copy; +}; + +#define PQI_DEFAULT_QUEUE_GROUP 0 +#define PQI_MAX_QUEUE_GROUPS PQI_MAX_MSIX_VECTORS + +struct pqi_encryption_info { + u16 data_encryption_key_index; + u32 encrypt_tweak_lower; + u32 encrypt_tweak_upper; +}; + +#pragma pack(1) + +#define PQI_CONFIG_TABLE_SIGNATURE "CFGTABLE" +#define PQI_CONFIG_TABLE_MAX_LENGTH ((u16)~0) + +/* configuration table section IDs */ +#define PQI_CONFIG_TABLE_ALL_SECTIONS (-1) +#define PQI_CONFIG_TABLE_SECTION_GENERAL_INFO 0 +#define PQI_CONFIG_TABLE_SECTION_FIRMWARE_FEATURES 1 +#define PQI_CONFIG_TABLE_SECTION_FIRMWARE_ERRATA 2 +#define PQI_CONFIG_TABLE_SECTION_DEBUG 3 +#define PQI_CONFIG_TABLE_SECTION_HEARTBEAT 4 +#define PQI_CONFIG_TABLE_SECTION_SOFT_RESET 5 + +struct pqi_config_table { + u8 signature[8]; /* "CFGTABLE" */ + __le32 first_section_offset; /* offset in bytes from the base */ + /* address of this table to the */ + /* first section */ +}; + +struct pqi_config_table_section_header { + __le16 section_id; /* as defined by the */ + /* PQI_CONFIG_TABLE_SECTION_* */ + /* manifest constants above */ + __le16 next_section_offset; /* offset in bytes from base */ + /* address of the table of the */ + /* next section or 0 if last entry */ +}; + +struct pqi_config_table_general_info { + struct pqi_config_table_section_header header; + __le32 section_length; /* size of this section in bytes */ + /* including the section header */ + __le32 max_outstanding_requests; /* max. outstanding */ + /* commands supported by */ + /* the controller */ + __le32 max_sg_size; /* max. transfer size of a single */ + /* command */ + __le32 max_sg_per_request; /* max. number of scatter-gather */ + /* entries supported in a single */ + /* command */ +}; + +struct pqi_config_table_firmware_features { + struct pqi_config_table_section_header header; + __le16 num_elements; + u8 features_supported[]; +/* u8 features_requested_by_host[]; */ +/* u8 features_enabled[]; */ +}; + +#define PQI_FIRMWARE_FEATURE_OFA 0 +#define PQI_FIRMWARE_FEATURE_SMP 1 +#define PQI_FIRMWARE_FEATURE_SOFT_RESET_HANDSHAKE 11 +#define PQI_FIRMWARE_FEATURE_RAID_IU_TIMEOUT 13 +#define PQI_FIRMWARE_FEATURE_TMF_IU_TIMEOUT 14 + +struct pqi_config_table_debug { + struct pqi_config_table_section_header header; + __le32 scratchpad; +}; + +struct pqi_config_table_heartbeat { + struct pqi_config_table_section_header header; + __le32 heartbeat_counter; +}; + +struct pqi_config_table_soft_reset { + struct pqi_config_table_section_header header; + u8 soft_reset_status; +}; + +#define PQI_SOFT_RESET_INITIATE 0x1 +#define PQI_SOFT_RESET_ABORT 0x2 + +enum pqi_soft_reset_status { + RESET_INITIATE_FIRMWARE, + RESET_INITIATE_DRIVER, + RESET_ABORT, + RESET_NORESPONSE, + RESET_TIMEDOUT +}; + +union pqi_reset_register { + struct { + u32 reset_type : 3; + u32 reserved : 2; + u32 reset_action : 3; + u32 hold_in_pd1 : 1; + u32 reserved2 : 23; + } bits; + u32 all_bits; +}; + +#define PQI_RESET_ACTION_RESET 0x1 + +#define PQI_RESET_TYPE_NO_RESET 0x0 +#define PQI_RESET_TYPE_SOFT_RESET 0x1 +#define PQI_RESET_TYPE_FIRM_RESET 0x2 +#define PQI_RESET_TYPE_HARD_RESET 0x3 + +#define PQI_RESET_ACTION_COMPLETED 0x2 + +#define PQI_RESET_POLL_INTERVAL_MSECS 100 + +#define PQI_MAX_OUTSTANDING_REQUESTS ((u32)~0) +#define PQI_MAX_OUTSTANDING_REQUESTS_KDUMP 32 +#define PQI_MAX_TRANSFER_SIZE (1024U * 1024U) +#define PQI_MAX_TRANSFER_SIZE_KDUMP (512 * 1024U) + +#define RAID_MAP_MAX_ENTRIES 1024 + +#define PQI_PHYSICAL_DEVICE_BUS 0 +#define PQI_RAID_VOLUME_BUS 1 +#define PQI_HBA_BUS 2 +#define PQI_EXTERNAL_RAID_VOLUME_BUS 3 +#define PQI_MAX_BUS PQI_EXTERNAL_RAID_VOLUME_BUS +#define PQI_VSEP_CISS_BTL 379 + +struct report_lun_header { + __be32 list_length; + u8 flags; + u8 reserved[3]; +}; + +/* for flags field of struct report_lun_header */ +#define CISS_REPORT_LOG_FLAG_UNIQUE_LUN_ID (1 << 0) +#define CISS_REPORT_LOG_FLAG_QUEUE_DEPTH (1 << 5) +#define CISS_REPORT_LOG_FLAG_DRIVE_TYPE_MIX (1 << 6) + +#define CISS_REPORT_PHYS_FLAG_OTHER (1 << 1) + +struct report_log_lun_extended_entry { + u8 lunid[8]; + u8 volume_id[16]; +}; + +struct report_log_lun_extended { + struct report_lun_header header; + struct report_log_lun_extended_entry lun_entries[1]; +}; + +struct report_phys_lun_extended_entry { + u8 lunid[8]; + __be64 wwid; + u8 device_type; + u8 device_flags; + u8 lun_count; /* number of LUNs in a multi-LUN device */ + u8 redundant_paths; + u32 aio_handle; +}; + +/* for device_flags field of struct report_phys_lun_extended_entry */ +#define CISS_REPORT_PHYS_DEV_FLAG_AIO_ENABLED 0x8 + +struct report_phys_lun_extended { + struct report_lun_header header; + struct report_phys_lun_extended_entry lun_entries[1]; +}; + +struct raid_map_disk_data { + u32 aio_handle; + u8 xor_mult[2]; + u8 reserved[2]; +}; + +/* for flags field of RAID map */ +#define RAID_MAP_ENCRYPTION_ENABLED 0x1 + +struct raid_map { + __le32 structure_size; /* size of entire structure in bytes */ + __le32 volume_blk_size; /* bytes / block in the volume */ + __le64 volume_blk_cnt; /* logical blocks on the volume */ + u8 phys_blk_shift; /* shift factor to convert between */ + /* units of logical blocks and */ + /* physical disk blocks */ + u8 parity_rotation_shift; /* shift factor to convert between */ + /* units of logical stripes and */ + /* physical stripes */ + __le16 strip_size; /* blocks used on each disk / stripe */ + __le64 disk_starting_blk; /* first disk block used in volume */ + __le64 disk_blk_cnt; /* disk blocks used by volume / disk */ + __le16 data_disks_per_row; /* data disk entries / row in the map */ + __le16 metadata_disks_per_row; /* mirror/parity disk entries / row */ + /* in the map */ + __le16 row_cnt; /* rows in each layout map */ + __le16 layout_map_count; /* layout maps (1 map per */ + /* mirror parity group) */ + __le16 flags; + __le16 data_encryption_key_index; + u8 reserved[16]; + struct raid_map_disk_data disk_data[RAID_MAP_MAX_ENTRIES]; +}; + +#pragma pack() + +#define RAID_CTLR_LUNID "\0\0\0\0\0\0\0\0" + +struct pqi_scsi_dev { + int devtype; /* as reported by INQUIRY commmand */ + u8 device_type; /* as reported by */ + /* BMIC_IDENTIFY_PHYSICAL_DEVICE */ + /* only valid for devtype = TYPE_DISK */ + int bus; + int target; + int lun; + u8 scsi3addr[8]; + __be64 wwid; + u8 volume_id[16]; + u8 is_physical_device : 1; + u8 is_external_raid_device : 1; + u8 is_expander_smp_device : 1; + u8 target_lun_valid : 1; + u8 device_gone : 1; + u8 new_device : 1; + u8 keep_device : 1; + u8 volume_offline : 1; + u8 rescan : 1; + bool aio_enabled; /* only valid for physical disks */ + bool in_reset; + bool in_remove; + bool device_offline; + u8 vendor[8]; /* bytes 8-15 of inquiry data */ + u8 model[16]; /* bytes 16-31 of inquiry data */ + u64 sas_address; + u8 raid_level; + u16 queue_depth; /* max. queue_depth for this device */ + u16 advertised_queue_depth; + u32 aio_handle; + u8 volume_status; + u8 active_path_index; + u8 path_map; + u8 bay; + u8 box_index; + u8 phys_box_on_bus; + u8 phy_connected_dev_type; + u8 box[8]; + u16 phys_connector[8]; + bool raid_bypass_configured; /* RAID bypass configured */ + bool raid_bypass_enabled; /* RAID bypass enabled */ + int offload_to_mirror; /* Send next RAID bypass request */ + /* to mirror drive. */ + struct raid_map *raid_map; /* RAID bypass map */ + + struct pqi_sas_port *sas_port; + struct scsi_device *sdev; + + struct list_head scsi_device_list_entry; + struct list_head new_device_list_entry; + struct list_head add_list_entry; + struct list_head delete_list_entry; + + atomic_t scsi_cmds_outstanding; + atomic_t raid_bypass_cnt; +}; + +/* VPD inquiry pages */ +#define CISS_VPD_LV_DEVICE_GEOMETRY 0xc1 /* vendor-specific page */ +#define CISS_VPD_LV_BYPASS_STATUS 0xc2 /* vendor-specific page */ +#define CISS_VPD_LV_STATUS 0xc3 /* vendor-specific page */ + +#define VPD_PAGE (1 << 8) + +#pragma pack(1) + +/* structure for CISS_VPD_LV_STATUS */ +struct ciss_vpd_logical_volume_status { + u8 peripheral_info; + u8 page_code; + u8 reserved; + u8 page_length; + u8 volume_status; + u8 reserved2[3]; + __be32 flags; +}; + +#pragma pack() + +/* constants for volume_status field of ciss_vpd_logical_volume_status */ +#define CISS_LV_OK 0 +#define CISS_LV_FAILED 1 +#define CISS_LV_NOT_CONFIGURED 2 +#define CISS_LV_DEGRADED 3 +#define CISS_LV_READY_FOR_RECOVERY 4 +#define CISS_LV_UNDERGOING_RECOVERY 5 +#define CISS_LV_WRONG_PHYSICAL_DRIVE_REPLACED 6 +#define CISS_LV_PHYSICAL_DRIVE_CONNECTION_PROBLEM 7 +#define CISS_LV_HARDWARE_OVERHEATING 8 +#define CISS_LV_HARDWARE_HAS_OVERHEATED 9 +#define CISS_LV_UNDERGOING_EXPANSION 10 +#define CISS_LV_NOT_AVAILABLE 11 +#define CISS_LV_QUEUED_FOR_EXPANSION 12 +#define CISS_LV_DISABLED_SCSI_ID_CONFLICT 13 +#define CISS_LV_EJECTED 14 +#define CISS_LV_UNDERGOING_ERASE 15 +/* state 16 not used */ +#define CISS_LV_READY_FOR_PREDICTIVE_SPARE_REBUILD 17 +#define CISS_LV_UNDERGOING_RPI 18 +#define CISS_LV_PENDING_RPI 19 +#define CISS_LV_ENCRYPTED_NO_KEY 20 +/* state 21 not used */ +#define CISS_LV_UNDERGOING_ENCRYPTION 22 +#define CISS_LV_UNDERGOING_ENCRYPTION_REKEYING 23 +#define CISS_LV_ENCRYPTED_IN_NON_ENCRYPTED_CONTROLLER 24 +#define CISS_LV_PENDING_ENCRYPTION 25 +#define CISS_LV_PENDING_ENCRYPTION_REKEYING 26 +#define CISS_LV_NOT_SUPPORTED 27 +#define CISS_LV_STATUS_UNAVAILABLE 255 + +/* constants for flags field of ciss_vpd_logical_volume_status */ +#define CISS_LV_FLAGS_NO_HOST_IO 0x1 /* volume not available for */ + /* host I/O */ + +/* for SAS hosts and SAS expanders */ +struct pqi_sas_node { + struct device *parent_dev; + struct list_head port_list_head; +}; + +struct pqi_sas_port { + struct list_head port_list_entry; + u64 sas_address; + struct pqi_scsi_dev *device; + struct sas_port *port; + int next_phy_index; + struct list_head phy_list_head; + struct pqi_sas_node *parent_node; + struct sas_rphy *rphy; +}; + +struct pqi_sas_phy { + struct list_head phy_list_entry; + struct sas_phy *phy; + struct pqi_sas_port *parent_port; + bool added_to_port; +}; + +struct pqi_io_request { + atomic_t refcount; + u16 index; + void (*io_complete_callback)(struct pqi_io_request *io_request, + void *context); + void *context; + u8 raid_bypass : 1; + int status; + struct pqi_queue_group *queue_group; + struct scsi_cmnd *scmd; + void *error_info; + struct pqi_sg_descriptor *sg_chain_buffer; + dma_addr_t sg_chain_buffer_dma_handle; + void *iu; + struct list_head request_list_entry; +}; + +#define PQI_NUM_SUPPORTED_EVENTS 7 + +struct pqi_event { + bool pending; + u8 event_type; + __le16 event_id; + __le32 additional_event_id; + __le32 ofa_bytes_requested; + __le16 ofa_cancel_reason; +}; + +#define PQI_RESERVED_IO_SLOTS_LUN_RESET 1 +#define PQI_RESERVED_IO_SLOTS_EVENT_ACK PQI_NUM_SUPPORTED_EVENTS +#define PQI_RESERVED_IO_SLOTS_SYNCHRONOUS_REQUESTS 3 +#define PQI_RESERVED_IO_SLOTS \ + (PQI_RESERVED_IO_SLOTS_LUN_RESET + PQI_RESERVED_IO_SLOTS_EVENT_ACK + \ + PQI_RESERVED_IO_SLOTS_SYNCHRONOUS_REQUESTS) + +struct pqi_ctrl_info { + unsigned int ctrl_id; + struct pci_dev *pci_dev; + char firmware_version[11]; + char serial_number[17]; + char model[17]; + char vendor[9]; + void __iomem *iomem_base; + struct pqi_ctrl_registers __iomem *registers; + struct pqi_device_registers __iomem *pqi_registers; + u32 max_sg_entries; + u32 config_table_offset; + u32 config_table_length; + u16 max_inbound_queues; + u16 max_elements_per_iq; + u16 max_iq_element_length; + u16 max_outbound_queues; + u16 max_elements_per_oq; + u16 max_oq_element_length; + u32 max_transfer_size; + u32 max_outstanding_requests; + u32 max_io_slots; + unsigned int scsi_ml_can_queue; + unsigned short sg_tablesize; + unsigned int max_sectors; + u32 error_buffer_length; + void *error_buffer; + dma_addr_t error_buffer_dma_handle; + size_t sg_chain_buffer_length; + unsigned int num_queue_groups; + u16 max_hw_queue_index; + u16 num_elements_per_iq; + u16 num_elements_per_oq; + u16 max_inbound_iu_length_per_firmware; + u16 max_inbound_iu_length; + unsigned int max_sg_per_iu; + void *admin_queue_memory_base; + u32 admin_queue_memory_length; + dma_addr_t admin_queue_memory_base_dma_handle; + void *queue_memory_base; + u32 queue_memory_length; + dma_addr_t queue_memory_base_dma_handle; + struct pqi_admin_queues admin_queues; + struct pqi_queue_group queue_groups[PQI_MAX_QUEUE_GROUPS]; + struct pqi_event_queue event_queue; + enum pqi_irq_mode irq_mode; + int max_msix_vectors; + int num_msix_vectors_enabled; + int num_msix_vectors_initialized; + int event_irq; + struct Scsi_Host *scsi_host; + + struct mutex scan_mutex; + struct mutex lun_reset_mutex; + struct mutex ofa_mutex; /* serialize ofa */ + bool controller_online; + bool block_requests; + bool block_device_reset; + bool in_ofa; + bool in_shutdown; + u8 inbound_spanning_supported : 1; + u8 outbound_spanning_supported : 1; + u8 pqi_mode_enabled : 1; + u8 pqi_reset_quiesce_supported : 1; + u8 soft_reset_handshake_supported : 1; + u8 raid_iu_timeout_supported: 1; + u8 tmf_iu_timeout_supported: 1; + + struct list_head scsi_device_list; + spinlock_t scsi_device_list_lock; + + struct delayed_work rescan_work; + struct delayed_work update_time_work; + + struct pqi_sas_node *sas_host; + u64 sas_address; + + struct pqi_io_request *io_request_pool; + u16 next_io_request_slot; + + struct pqi_event events[PQI_NUM_SUPPORTED_EVENTS]; + struct work_struct event_work; + + atomic_t num_interrupts; + int previous_num_interrupts; + u32 previous_heartbeat_count; + __le32 __iomem *heartbeat_counter; + u8 __iomem *soft_reset_status; + struct timer_list heartbeat_timer; + struct work_struct ctrl_offline_work; + + struct semaphore sync_request_sem; + atomic_t num_busy_threads; + atomic_t num_blocked_threads; + wait_queue_head_t block_requests_wait; + + struct list_head raid_bypass_retry_list; + spinlock_t raid_bypass_retry_list_lock; + struct work_struct raid_bypass_retry_work; + + struct pqi_ofa_memory *pqi_ofa_mem_virt_addr; + dma_addr_t pqi_ofa_mem_dma_handle; + void **pqi_ofa_chunk_virt_addr; + atomic_t sync_cmds_outstanding; +}; + +enum pqi_ctrl_mode { + SIS_MODE = 0, + PQI_MODE +}; + +/* + * assume worst case: SATA queue depth of 31 minus 4 internal firmware commands + */ +#define PQI_PHYSICAL_DISK_DEFAULT_MAX_QUEUE_DEPTH 27 + +/* CISS commands */ +#define CISS_READ 0xc0 +#define CISS_REPORT_LOG 0xc2 /* Report Logical LUNs */ +#define CISS_REPORT_PHYS 0xc3 /* Report Physical LUNs */ +#define CISS_GET_RAID_MAP 0xc8 + +/* BMIC commands */ +#define BMIC_IDENTIFY_CONTROLLER 0x11 +#define BMIC_IDENTIFY_PHYSICAL_DEVICE 0x15 +#define BMIC_READ 0x26 +#define BMIC_WRITE 0x27 +#define BMIC_SENSE_CONTROLLER_PARAMETERS 0x64 +#define BMIC_SENSE_SUBSYSTEM_INFORMATION 0x66 +#define BMIC_CSMI_PASSTHRU 0x68 +#define BMIC_WRITE_HOST_WELLNESS 0xa5 +#define BMIC_FLUSH_CACHE 0xc2 +#define BMIC_SET_DIAG_OPTIONS 0xf4 +#define BMIC_SENSE_DIAG_OPTIONS 0xf5 + +#define CSMI_CC_SAS_SMP_PASSTHRU 0x17 + +#define SA_FLUSH_CACHE 0x1 + +#define MASKED_DEVICE(lunid) ((lunid)[3] & 0xc0) +#define CISS_GET_LEVEL_2_BUS(lunid) ((lunid)[7] & 0x3f) +#define CISS_GET_LEVEL_2_TARGET(lunid) ((lunid)[6]) +#define CISS_GET_DRIVE_NUMBER(lunid) \ + (((CISS_GET_LEVEL_2_BUS((lunid)) - 1) << 8) + \ + CISS_GET_LEVEL_2_TARGET((lunid))) + +#define NO_TIMEOUT ((unsigned long) -1) + +#pragma pack(1) + +struct bmic_identify_controller { + u8 configured_logical_drive_count; + __le32 configuration_signature; + u8 firmware_version[4]; + u8 reserved[145]; + __le16 extended_logical_unit_count; + u8 reserved1[34]; + __le16 firmware_build_number; + u8 reserved2[8]; + u8 vendor_id[8]; + u8 product_id[16]; + u8 reserved3[68]; + u8 controller_mode; + u8 reserved4[32]; +}; + +struct bmic_sense_subsystem_info { + u8 reserved[44]; + u8 ctrl_serial_number[16]; +}; + +/* constants for device_type field */ +#define SA_DEVICE_TYPE_SATA 0x1 +#define SA_DEVICE_TYPE_SAS 0x2 +#define SA_DEVICE_TYPE_EXPANDER_SMP 0x5 +#define SA_DEVICE_TYPE_SES 0x6 +#define SA_DEVICE_TYPE_CONTROLLER 0x7 +#define SA_DEVICE_TYPE_NVME 0x9 + +struct bmic_identify_physical_device { + u8 scsi_bus; /* SCSI Bus number on controller */ + u8 scsi_id; /* SCSI ID on this bus */ + __le16 block_size; /* sector size in bytes */ + __le32 total_blocks; /* number for sectors on drive */ + __le32 reserved_blocks; /* controller reserved (RIS) */ + u8 model[40]; /* Physical Drive Model */ + u8 serial_number[40]; /* Drive Serial Number */ + u8 firmware_revision[8]; /* drive firmware revision */ + u8 scsi_inquiry_bits; /* inquiry byte 7 bits */ + u8 compaq_drive_stamp; /* 0 means drive not stamped */ + u8 last_failure_reason; + u8 flags; + u8 more_flags; + u8 scsi_lun; /* SCSI LUN for phys drive */ + u8 yet_more_flags; + u8 even_more_flags; + __le32 spi_speed_rules; + u8 phys_connector[2]; /* connector number on controller */ + u8 phys_box_on_bus; /* phys enclosure this drive resides */ + u8 phys_bay_in_box; /* phys drv bay this drive resides */ + __le32 rpm; /* drive rotational speed in RPM */ + u8 device_type; /* type of drive */ + u8 sata_version; /* only valid when device_type = */ + /* SA_DEVICE_TYPE_SATA */ + __le64 big_total_block_count; + __le64 ris_starting_lba; + __le32 ris_size; + u8 wwid[20]; + u8 controller_phy_map[32]; + __le16 phy_count; + u8 phy_connected_dev_type[256]; + u8 phy_to_drive_bay_num[256]; + __le16 phy_to_attached_dev_index[256]; + u8 box_index; + u8 reserved; + __le16 extra_physical_drive_flags; + u8 negotiated_link_rate[256]; + u8 phy_to_phy_map[256]; + u8 redundant_path_present_map; + u8 redundant_path_failure_map; + u8 active_path_number; + __le16 alternate_paths_phys_connector[8]; + u8 alternate_paths_phys_box_on_port[8]; + u8 multi_lun_device_lun_count; + u8 minimum_good_fw_revision[8]; + u8 unique_inquiry_bytes[20]; + u8 current_temperature_degrees; + u8 temperature_threshold_degrees; + u8 max_temperature_degrees; + u8 logical_blocks_per_phys_block_exp; + __le16 current_queue_depth_limit; + u8 switch_name[10]; + __le16 switch_port; + u8 alternate_paths_switch_name[40]; + u8 alternate_paths_switch_port[8]; + __le16 power_on_hours; + __le16 percent_endurance_used; + u8 drive_authentication; + u8 smart_carrier_authentication; + u8 smart_carrier_app_fw_version; + u8 smart_carrier_bootloader_fw_version; + u8 sanitize_flags; + u8 encryption_key_flags; + u8 encryption_key_name[64]; + __le32 misc_drive_flags; + __le16 dek_index; + __le16 hba_drive_encryption_flags; + __le16 max_overwrite_time; + __le16 max_block_erase_time; + __le16 max_crypto_erase_time; + u8 connector_info[5]; + u8 connector_name[8][8]; + u8 page_83_identifier[16]; + u8 maximum_link_rate[256]; + u8 negotiated_physical_link_rate[256]; + u8 box_connector_name[8]; + u8 padding_to_multiple_of_512[9]; +}; + +struct bmic_smp_request { + u8 frame_type; + u8 function; + u8 allocated_response_length; + u8 request_length; + u8 additional_request_bytes[1016]; +}; + +struct bmic_smp_response { + u8 frame_type; + u8 function; + u8 function_result; + u8 response_length; + u8 additional_response_bytes[1016]; +}; + +struct bmic_csmi_ioctl_header { + __le32 header_length; + u8 signature[8]; + __le32 timeout; + __le32 control_code; + __le32 return_code; + __le32 length; +}; + +struct bmic_csmi_smp_passthru { + u8 phy_identifier; + u8 port_identifier; + u8 connection_rate; + u8 reserved; + __be64 destination_sas_address; + __le32 request_length; + struct bmic_smp_request request; + u8 connection_status; + u8 reserved1[3]; + __le32 response_length; + struct bmic_smp_response response; +}; + +struct bmic_csmi_smp_passthru_buffer { + struct bmic_csmi_ioctl_header ioctl_header; + struct bmic_csmi_smp_passthru parameters; +}; + +struct bmic_flush_cache { + u8 disable_flag; + u8 system_power_action; + u8 ndu_flush; + u8 shutdown_event; + u8 reserved[28]; +}; + +/* for shutdown_event member of struct bmic_flush_cache */ +enum bmic_flush_cache_shutdown_event { + NONE_CACHE_FLUSH_ONLY = 0, + SHUTDOWN = 1, + HIBERNATE = 2, + SUSPEND = 3, + RESTART = 4 +}; + +struct bmic_diag_options { + __le32 options; +}; + +#pragma pack() + +static inline void pqi_ctrl_busy(struct pqi_ctrl_info *ctrl_info) +{ + atomic_inc(&ctrl_info->num_busy_threads); +} + +static inline void pqi_ctrl_unbusy(struct pqi_ctrl_info *ctrl_info) +{ + atomic_dec(&ctrl_info->num_busy_threads); +} + +static inline struct pqi_ctrl_info *shost_to_hba(struct Scsi_Host *shost) +{ + void *hostdata = shost_priv(shost); + + return *((struct pqi_ctrl_info **)hostdata); +} + +void pqi_sas_smp_handler(struct bsg_job *job, struct Scsi_Host *shost, + struct sas_rphy *rphy); + +int pqi_add_sas_host(struct Scsi_Host *shost, struct pqi_ctrl_info *ctrl_info); +void pqi_delete_sas_host(struct pqi_ctrl_info *ctrl_info); +int pqi_add_sas_device(struct pqi_sas_node *pqi_sas_node, + struct pqi_scsi_dev *device); +void pqi_remove_sas_device(struct pqi_scsi_dev *device); +struct pqi_scsi_dev *pqi_find_device_by_sas_rphy( + struct pqi_ctrl_info *ctrl_info, struct sas_rphy *rphy); +void pqi_prep_for_scsi_done(struct scsi_cmnd *scmd); +int pqi_csmi_smp_passthru(struct pqi_ctrl_info *ctrl_info, + struct bmic_csmi_smp_passthru_buffer *buffer, size_t buffer_length, + struct pqi_raid_error_info *error_info); + +extern struct sas_function_template pqi_sas_transport_functions; + +#endif /* _SMARTPQI_H */ diff --git a/drivers/scsi/smartpqi/smartpqi_init.c b/drivers/scsi/smartpqi/smartpqi_init.c new file mode 100644 index 000000000..fcff35e20 --- /dev/null +++ b/drivers/scsi/smartpqi/smartpqi_init.c @@ -0,0 +1,9207 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * driver for Microsemi PQI-based storage controllers + * Copyright (c) 2019-2020 Microchip Technology Inc. and its subsidiaries + * Copyright (c) 2016-2018 Microsemi Corporation + * Copyright (c) 2016 PMC-Sierra, Inc. + * + * Questions/Comments/Bugfixes to storagedev@microchip.com + * + */ + +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/pci.h> +#include <linux/delay.h> +#include <linux/interrupt.h> +#include <linux/sched.h> +#include <linux/rtc.h> +#include <linux/bcd.h> +#include <linux/reboot.h> +#include <linux/cciss_ioctl.h> +#include <linux/blk-mq-pci.h> +#include <scsi/scsi_host.h> +#include <scsi/scsi_cmnd.h> +#include <scsi/scsi_device.h> +#include <scsi/scsi_eh.h> +#include <scsi/scsi_transport_sas.h> +#include <asm/unaligned.h> +#include "smartpqi.h" +#include "smartpqi_sis.h" + +#if !defined(BUILD_TIMESTAMP) +#define BUILD_TIMESTAMP +#endif + +#define DRIVER_VERSION "1.2.16-010" +#define DRIVER_MAJOR 1 +#define DRIVER_MINOR 2 +#define DRIVER_RELEASE 16 +#define DRIVER_REVISION 10 + +#define DRIVER_NAME "Microsemi PQI Driver (v" \ + DRIVER_VERSION BUILD_TIMESTAMP ")" +#define DRIVER_NAME_SHORT "smartpqi" + +#define PQI_EXTRA_SGL_MEMORY (12 * sizeof(struct pqi_sg_descriptor)) + +MODULE_AUTHOR("Microsemi"); +MODULE_DESCRIPTION("Driver for Microsemi Smart Family Controller version " + DRIVER_VERSION); +MODULE_SUPPORTED_DEVICE("Microsemi Smart Family Controllers"); +MODULE_VERSION(DRIVER_VERSION); +MODULE_LICENSE("GPL"); + +static void pqi_take_ctrl_offline(struct pqi_ctrl_info *ctrl_info); +static void pqi_ctrl_offline_worker(struct work_struct *work); +static void pqi_retry_raid_bypass_requests(struct pqi_ctrl_info *ctrl_info); +static int pqi_scan_scsi_devices(struct pqi_ctrl_info *ctrl_info); +static void pqi_scan_start(struct Scsi_Host *shost); +static void pqi_start_io(struct pqi_ctrl_info *ctrl_info, + struct pqi_queue_group *queue_group, enum pqi_io_path path, + struct pqi_io_request *io_request); +static int pqi_submit_raid_request_synchronous(struct pqi_ctrl_info *ctrl_info, + struct pqi_iu_header *request, unsigned int flags, + struct pqi_raid_error_info *error_info, unsigned long timeout_msecs); +static int pqi_aio_submit_io(struct pqi_ctrl_info *ctrl_info, + struct scsi_cmnd *scmd, u32 aio_handle, u8 *cdb, + unsigned int cdb_length, struct pqi_queue_group *queue_group, + struct pqi_encryption_info *encryption_info, bool raid_bypass); +static void pqi_ofa_ctrl_quiesce(struct pqi_ctrl_info *ctrl_info); +static void pqi_ofa_ctrl_unquiesce(struct pqi_ctrl_info *ctrl_info); +static int pqi_ofa_ctrl_restart(struct pqi_ctrl_info *ctrl_info); +static void pqi_ofa_setup_host_buffer(struct pqi_ctrl_info *ctrl_info, + u32 bytes_requested); +static void pqi_ofa_free_host_buffer(struct pqi_ctrl_info *ctrl_info); +static int pqi_ofa_host_memory_update(struct pqi_ctrl_info *ctrl_info); +static int pqi_device_wait_for_pending_io(struct pqi_ctrl_info *ctrl_info, + struct pqi_scsi_dev *device, unsigned long timeout_secs); + +/* for flags argument to pqi_submit_raid_request_synchronous() */ +#define PQI_SYNC_FLAGS_INTERRUPTABLE 0x1 + +static struct scsi_transport_template *pqi_sas_transport_template; + +static atomic_t pqi_controller_count = ATOMIC_INIT(0); + +enum pqi_lockup_action { + NONE, + REBOOT, + PANIC +}; + +static enum pqi_lockup_action pqi_lockup_action = NONE; + +static struct { + enum pqi_lockup_action action; + char *name; +} pqi_lockup_actions[] = { + { + .action = NONE, + .name = "none", + }, + { + .action = REBOOT, + .name = "reboot", + }, + { + .action = PANIC, + .name = "panic", + }, +}; + +static unsigned int pqi_supported_event_types[] = { + PQI_EVENT_TYPE_HOTPLUG, + PQI_EVENT_TYPE_HARDWARE, + PQI_EVENT_TYPE_PHYSICAL_DEVICE, + PQI_EVENT_TYPE_LOGICAL_DEVICE, + PQI_EVENT_TYPE_OFA, + PQI_EVENT_TYPE_AIO_STATE_CHANGE, + PQI_EVENT_TYPE_AIO_CONFIG_CHANGE, +}; + +static int pqi_disable_device_id_wildcards; +module_param_named(disable_device_id_wildcards, + pqi_disable_device_id_wildcards, int, 0644); +MODULE_PARM_DESC(disable_device_id_wildcards, + "Disable device ID wildcards."); + +static int pqi_disable_heartbeat; +module_param_named(disable_heartbeat, + pqi_disable_heartbeat, int, 0644); +MODULE_PARM_DESC(disable_heartbeat, + "Disable heartbeat."); + +static int pqi_disable_ctrl_shutdown; +module_param_named(disable_ctrl_shutdown, + pqi_disable_ctrl_shutdown, int, 0644); +MODULE_PARM_DESC(disable_ctrl_shutdown, + "Disable controller shutdown when controller locked up."); + +static char *pqi_lockup_action_param; +module_param_named(lockup_action, + pqi_lockup_action_param, charp, 0644); +MODULE_PARM_DESC(lockup_action, "Action to take when controller locked up.\n" + "\t\tSupported: none, reboot, panic\n" + "\t\tDefault: none"); + +static int pqi_expose_ld_first; +module_param_named(expose_ld_first, + pqi_expose_ld_first, int, 0644); +MODULE_PARM_DESC(expose_ld_first, + "Expose logical drives before physical drives."); + +static int pqi_hide_vsep; +module_param_named(hide_vsep, + pqi_hide_vsep, int, 0644); +MODULE_PARM_DESC(hide_vsep, + "Hide the virtual SEP for direct attached drives."); + +static char *raid_levels[] = { + "RAID-0", + "RAID-4", + "RAID-1(1+0)", + "RAID-5", + "RAID-5+1", + "RAID-ADG", + "RAID-1(ADM)", +}; + +static char *pqi_raid_level_to_string(u8 raid_level) +{ + if (raid_level < ARRAY_SIZE(raid_levels)) + return raid_levels[raid_level]; + + return "RAID UNKNOWN"; +} + +#define SA_RAID_0 0 +#define SA_RAID_4 1 +#define SA_RAID_1 2 /* also used for RAID 10 */ +#define SA_RAID_5 3 /* also used for RAID 50 */ +#define SA_RAID_51 4 +#define SA_RAID_6 5 /* also used for RAID 60 */ +#define SA_RAID_ADM 6 /* also used for RAID 1+0 ADM */ +#define SA_RAID_MAX SA_RAID_ADM +#define SA_RAID_UNKNOWN 0xff + +static inline void pqi_scsi_done(struct scsi_cmnd *scmd) +{ + pqi_prep_for_scsi_done(scmd); + scmd->scsi_done(scmd); +} + +static inline void pqi_disable_write_same(struct scsi_device *sdev) +{ + sdev->no_write_same = 1; +} + +static inline bool pqi_scsi3addr_equal(u8 *scsi3addr1, u8 *scsi3addr2) +{ + return memcmp(scsi3addr1, scsi3addr2, 8) == 0; +} + +static inline bool pqi_is_logical_device(struct pqi_scsi_dev *device) +{ + return !device->is_physical_device; +} + +static inline bool pqi_is_external_raid_addr(u8 *scsi3addr) +{ + return scsi3addr[2] != 0; +} + +static inline bool pqi_ctrl_offline(struct pqi_ctrl_info *ctrl_info) +{ + return !ctrl_info->controller_online; +} + +static inline void pqi_check_ctrl_health(struct pqi_ctrl_info *ctrl_info) +{ + if (ctrl_info->controller_online) + if (!sis_is_firmware_running(ctrl_info)) + pqi_take_ctrl_offline(ctrl_info); +} + +static inline bool pqi_is_hba_lunid(u8 *scsi3addr) +{ + return pqi_scsi3addr_equal(scsi3addr, RAID_CTLR_LUNID); +} + +static inline enum pqi_ctrl_mode pqi_get_ctrl_mode( + struct pqi_ctrl_info *ctrl_info) +{ + return sis_read_driver_scratch(ctrl_info); +} + +static inline void pqi_save_ctrl_mode(struct pqi_ctrl_info *ctrl_info, + enum pqi_ctrl_mode mode) +{ + sis_write_driver_scratch(ctrl_info, mode); +} + +static inline void pqi_ctrl_block_device_reset(struct pqi_ctrl_info *ctrl_info) +{ + ctrl_info->block_device_reset = true; +} + +static inline bool pqi_device_reset_blocked(struct pqi_ctrl_info *ctrl_info) +{ + return ctrl_info->block_device_reset; +} + +static inline bool pqi_ctrl_blocked(struct pqi_ctrl_info *ctrl_info) +{ + return ctrl_info->block_requests; +} + +static inline void pqi_ctrl_block_requests(struct pqi_ctrl_info *ctrl_info) +{ + ctrl_info->block_requests = true; + scsi_block_requests(ctrl_info->scsi_host); +} + +static inline void pqi_ctrl_unblock_requests(struct pqi_ctrl_info *ctrl_info) +{ + ctrl_info->block_requests = false; + wake_up_all(&ctrl_info->block_requests_wait); + pqi_retry_raid_bypass_requests(ctrl_info); + scsi_unblock_requests(ctrl_info->scsi_host); +} + +static unsigned long pqi_wait_if_ctrl_blocked(struct pqi_ctrl_info *ctrl_info, + unsigned long timeout_msecs) +{ + unsigned long remaining_msecs; + + if (!pqi_ctrl_blocked(ctrl_info)) + return timeout_msecs; + + atomic_inc(&ctrl_info->num_blocked_threads); + + if (timeout_msecs == NO_TIMEOUT) { + wait_event(ctrl_info->block_requests_wait, + !pqi_ctrl_blocked(ctrl_info)); + remaining_msecs = timeout_msecs; + } else { + unsigned long remaining_jiffies; + + remaining_jiffies = + wait_event_timeout(ctrl_info->block_requests_wait, + !pqi_ctrl_blocked(ctrl_info), + msecs_to_jiffies(timeout_msecs)); + remaining_msecs = jiffies_to_msecs(remaining_jiffies); + } + + atomic_dec(&ctrl_info->num_blocked_threads); + + return remaining_msecs; +} + +static inline void pqi_ctrl_wait_until_quiesced(struct pqi_ctrl_info *ctrl_info) +{ + while (atomic_read(&ctrl_info->num_busy_threads) > + atomic_read(&ctrl_info->num_blocked_threads)) + usleep_range(1000, 2000); +} + +static inline bool pqi_device_offline(struct pqi_scsi_dev *device) +{ + return device->device_offline; +} + +static inline void pqi_device_reset_start(struct pqi_scsi_dev *device) +{ + device->in_reset = true; +} + +static inline void pqi_device_reset_done(struct pqi_scsi_dev *device) +{ + device->in_reset = false; +} + +static inline bool pqi_device_in_reset(struct pqi_scsi_dev *device) +{ + return device->in_reset; +} + +static inline void pqi_ctrl_ofa_start(struct pqi_ctrl_info *ctrl_info) +{ + ctrl_info->in_ofa = true; +} + +static inline void pqi_ctrl_ofa_done(struct pqi_ctrl_info *ctrl_info) +{ + ctrl_info->in_ofa = false; +} + +static inline bool pqi_ctrl_in_ofa(struct pqi_ctrl_info *ctrl_info) +{ + return ctrl_info->in_ofa; +} + +static inline void pqi_device_remove_start(struct pqi_scsi_dev *device) +{ + device->in_remove = true; +} + +static inline bool pqi_device_in_remove(struct pqi_ctrl_info *ctrl_info, + struct pqi_scsi_dev *device) +{ + return device->in_remove && !ctrl_info->in_shutdown; +} + +static inline void pqi_ctrl_shutdown_start(struct pqi_ctrl_info *ctrl_info) +{ + ctrl_info->in_shutdown = true; +} + +static inline bool pqi_ctrl_in_shutdown(struct pqi_ctrl_info *ctrl_info) +{ + return ctrl_info->in_shutdown; +} + +static inline void pqi_schedule_rescan_worker_with_delay( + struct pqi_ctrl_info *ctrl_info, unsigned long delay) +{ + if (pqi_ctrl_offline(ctrl_info)) + return; + if (pqi_ctrl_in_ofa(ctrl_info)) + return; + + schedule_delayed_work(&ctrl_info->rescan_work, delay); +} + +static inline void pqi_schedule_rescan_worker(struct pqi_ctrl_info *ctrl_info) +{ + pqi_schedule_rescan_worker_with_delay(ctrl_info, 0); +} + +#define PQI_RESCAN_WORK_DELAY (10 * PQI_HZ) + +static inline void pqi_schedule_rescan_worker_delayed( + struct pqi_ctrl_info *ctrl_info) +{ + pqi_schedule_rescan_worker_with_delay(ctrl_info, PQI_RESCAN_WORK_DELAY); +} + +static inline void pqi_cancel_rescan_worker(struct pqi_ctrl_info *ctrl_info) +{ + cancel_delayed_work_sync(&ctrl_info->rescan_work); +} + +static inline void pqi_cancel_event_worker(struct pqi_ctrl_info *ctrl_info) +{ + cancel_work_sync(&ctrl_info->event_work); +} + +static inline u32 pqi_read_heartbeat_counter(struct pqi_ctrl_info *ctrl_info) +{ + if (!ctrl_info->heartbeat_counter) + return 0; + + return readl(ctrl_info->heartbeat_counter); +} + +static inline u8 pqi_read_soft_reset_status(struct pqi_ctrl_info *ctrl_info) +{ + if (!ctrl_info->soft_reset_status) + return 0; + + return readb(ctrl_info->soft_reset_status); +} + +static inline void pqi_clear_soft_reset_status(struct pqi_ctrl_info *ctrl_info, + u8 clear) +{ + u8 status; + + if (!ctrl_info->soft_reset_status) + return; + + status = pqi_read_soft_reset_status(ctrl_info); + status &= ~clear; + writeb(status, ctrl_info->soft_reset_status); +} + +static int pqi_map_single(struct pci_dev *pci_dev, + struct pqi_sg_descriptor *sg_descriptor, void *buffer, + size_t buffer_length, enum dma_data_direction data_direction) +{ + dma_addr_t bus_address; + + if (!buffer || buffer_length == 0 || data_direction == DMA_NONE) + return 0; + + bus_address = dma_map_single(&pci_dev->dev, buffer, buffer_length, + data_direction); + if (dma_mapping_error(&pci_dev->dev, bus_address)) + return -ENOMEM; + + put_unaligned_le64((u64)bus_address, &sg_descriptor->address); + put_unaligned_le32(buffer_length, &sg_descriptor->length); + put_unaligned_le32(CISS_SG_LAST, &sg_descriptor->flags); + + return 0; +} + +static void pqi_pci_unmap(struct pci_dev *pci_dev, + struct pqi_sg_descriptor *descriptors, int num_descriptors, + enum dma_data_direction data_direction) +{ + int i; + + if (data_direction == DMA_NONE) + return; + + for (i = 0; i < num_descriptors; i++) + dma_unmap_single(&pci_dev->dev, + (dma_addr_t)get_unaligned_le64(&descriptors[i].address), + get_unaligned_le32(&descriptors[i].length), + data_direction); +} + +static int pqi_build_raid_path_request(struct pqi_ctrl_info *ctrl_info, + struct pqi_raid_path_request *request, u8 cmd, + u8 *scsi3addr, void *buffer, size_t buffer_length, + u16 vpd_page, enum dma_data_direction *dir) +{ + u8 *cdb; + size_t cdb_length = buffer_length; + + memset(request, 0, sizeof(*request)); + + request->header.iu_type = PQI_REQUEST_IU_RAID_PATH_IO; + put_unaligned_le16(offsetof(struct pqi_raid_path_request, + sg_descriptors[1]) - PQI_REQUEST_HEADER_LENGTH, + &request->header.iu_length); + put_unaligned_le32(buffer_length, &request->buffer_length); + memcpy(request->lun_number, scsi3addr, sizeof(request->lun_number)); + request->task_attribute = SOP_TASK_ATTRIBUTE_SIMPLE; + request->additional_cdb_bytes_usage = SOP_ADDITIONAL_CDB_BYTES_0; + + cdb = request->cdb; + + switch (cmd) { + case INQUIRY: + request->data_direction = SOP_READ_FLAG; + cdb[0] = INQUIRY; + if (vpd_page & VPD_PAGE) { + cdb[1] = 0x1; + cdb[2] = (u8)vpd_page; + } + cdb[4] = (u8)cdb_length; + break; + case CISS_REPORT_LOG: + case CISS_REPORT_PHYS: + request->data_direction = SOP_READ_FLAG; + cdb[0] = cmd; + if (cmd == CISS_REPORT_PHYS) + cdb[1] = CISS_REPORT_PHYS_FLAG_OTHER; + else + cdb[1] = CISS_REPORT_LOG_FLAG_UNIQUE_LUN_ID; + put_unaligned_be32(cdb_length, &cdb[6]); + break; + case CISS_GET_RAID_MAP: + request->data_direction = SOP_READ_FLAG; + cdb[0] = CISS_READ; + cdb[1] = CISS_GET_RAID_MAP; + put_unaligned_be32(cdb_length, &cdb[6]); + break; + case SA_FLUSH_CACHE: + request->data_direction = SOP_WRITE_FLAG; + cdb[0] = BMIC_WRITE; + cdb[6] = BMIC_FLUSH_CACHE; + put_unaligned_be16(cdb_length, &cdb[7]); + break; + case BMIC_SENSE_DIAG_OPTIONS: + cdb_length = 0; + fallthrough; + case BMIC_IDENTIFY_CONTROLLER: + case BMIC_IDENTIFY_PHYSICAL_DEVICE: + case BMIC_SENSE_SUBSYSTEM_INFORMATION: + request->data_direction = SOP_READ_FLAG; + cdb[0] = BMIC_READ; + cdb[6] = cmd; + put_unaligned_be16(cdb_length, &cdb[7]); + break; + case BMIC_SET_DIAG_OPTIONS: + cdb_length = 0; + fallthrough; + case BMIC_WRITE_HOST_WELLNESS: + request->data_direction = SOP_WRITE_FLAG; + cdb[0] = BMIC_WRITE; + cdb[6] = cmd; + put_unaligned_be16(cdb_length, &cdb[7]); + break; + case BMIC_CSMI_PASSTHRU: + request->data_direction = SOP_BIDIRECTIONAL; + cdb[0] = BMIC_WRITE; + cdb[5] = CSMI_CC_SAS_SMP_PASSTHRU; + cdb[6] = cmd; + put_unaligned_be16(cdb_length, &cdb[7]); + break; + default: + dev_err(&ctrl_info->pci_dev->dev, "unknown command 0x%c\n", cmd); + break; + } + + switch (request->data_direction) { + case SOP_READ_FLAG: + *dir = DMA_FROM_DEVICE; + break; + case SOP_WRITE_FLAG: + *dir = DMA_TO_DEVICE; + break; + case SOP_NO_DIRECTION_FLAG: + *dir = DMA_NONE; + break; + default: + *dir = DMA_BIDIRECTIONAL; + break; + } + + return pqi_map_single(ctrl_info->pci_dev, &request->sg_descriptors[0], + buffer, buffer_length, *dir); +} + +static inline void pqi_reinit_io_request(struct pqi_io_request *io_request) +{ + io_request->scmd = NULL; + io_request->status = 0; + io_request->error_info = NULL; + io_request->raid_bypass = false; +} + +static struct pqi_io_request *pqi_alloc_io_request( + struct pqi_ctrl_info *ctrl_info) +{ + struct pqi_io_request *io_request; + u16 i = ctrl_info->next_io_request_slot; /* benignly racy */ + + while (1) { + io_request = &ctrl_info->io_request_pool[i]; + if (atomic_inc_return(&io_request->refcount) == 1) + break; + atomic_dec(&io_request->refcount); + i = (i + 1) % ctrl_info->max_io_slots; + } + + /* benignly racy */ + ctrl_info->next_io_request_slot = (i + 1) % ctrl_info->max_io_slots; + + pqi_reinit_io_request(io_request); + + return io_request; +} + +static void pqi_free_io_request(struct pqi_io_request *io_request) +{ + atomic_dec(&io_request->refcount); +} + +static int pqi_send_scsi_raid_request(struct pqi_ctrl_info *ctrl_info, u8 cmd, + u8 *scsi3addr, void *buffer, size_t buffer_length, u16 vpd_page, + struct pqi_raid_error_info *error_info, unsigned long timeout_msecs) +{ + int rc; + struct pqi_raid_path_request request; + enum dma_data_direction dir; + + rc = pqi_build_raid_path_request(ctrl_info, &request, + cmd, scsi3addr, buffer, + buffer_length, vpd_page, &dir); + if (rc) + return rc; + + rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header, 0, + error_info, timeout_msecs); + + pqi_pci_unmap(ctrl_info->pci_dev, request.sg_descriptors, 1, dir); + + return rc; +} + +/* helper functions for pqi_send_scsi_raid_request */ + +static inline int pqi_send_ctrl_raid_request(struct pqi_ctrl_info *ctrl_info, + u8 cmd, void *buffer, size_t buffer_length) +{ + return pqi_send_scsi_raid_request(ctrl_info, cmd, RAID_CTLR_LUNID, + buffer, buffer_length, 0, NULL, NO_TIMEOUT); +} + +static inline int pqi_send_ctrl_raid_with_error(struct pqi_ctrl_info *ctrl_info, + u8 cmd, void *buffer, size_t buffer_length, + struct pqi_raid_error_info *error_info) +{ + return pqi_send_scsi_raid_request(ctrl_info, cmd, RAID_CTLR_LUNID, + buffer, buffer_length, 0, error_info, NO_TIMEOUT); +} + +static inline int pqi_identify_controller(struct pqi_ctrl_info *ctrl_info, + struct bmic_identify_controller *buffer) +{ + return pqi_send_ctrl_raid_request(ctrl_info, BMIC_IDENTIFY_CONTROLLER, + buffer, sizeof(*buffer)); +} + +static inline int pqi_sense_subsystem_info(struct pqi_ctrl_info *ctrl_info, + struct bmic_sense_subsystem_info *sense_info) +{ + return pqi_send_ctrl_raid_request(ctrl_info, + BMIC_SENSE_SUBSYSTEM_INFORMATION, sense_info, + sizeof(*sense_info)); +} + +static inline int pqi_scsi_inquiry(struct pqi_ctrl_info *ctrl_info, + u8 *scsi3addr, u16 vpd_page, void *buffer, size_t buffer_length) +{ + return pqi_send_scsi_raid_request(ctrl_info, INQUIRY, scsi3addr, + buffer, buffer_length, vpd_page, NULL, NO_TIMEOUT); +} + +static int pqi_identify_physical_device(struct pqi_ctrl_info *ctrl_info, + struct pqi_scsi_dev *device, + struct bmic_identify_physical_device *buffer, size_t buffer_length) +{ + int rc; + enum dma_data_direction dir; + u16 bmic_device_index; + struct pqi_raid_path_request request; + + rc = pqi_build_raid_path_request(ctrl_info, &request, + BMIC_IDENTIFY_PHYSICAL_DEVICE, RAID_CTLR_LUNID, buffer, + buffer_length, 0, &dir); + if (rc) + return rc; + + bmic_device_index = CISS_GET_DRIVE_NUMBER(device->scsi3addr); + request.cdb[2] = (u8)bmic_device_index; + request.cdb[9] = (u8)(bmic_device_index >> 8); + + rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header, + 0, NULL, NO_TIMEOUT); + + pqi_pci_unmap(ctrl_info->pci_dev, request.sg_descriptors, 1, dir); + + return rc; +} + +static int pqi_flush_cache(struct pqi_ctrl_info *ctrl_info, + enum bmic_flush_cache_shutdown_event shutdown_event) +{ + int rc; + struct bmic_flush_cache *flush_cache; + + /* + * Don't bother trying to flush the cache if the controller is + * locked up. + */ + if (pqi_ctrl_offline(ctrl_info)) + return -ENXIO; + + flush_cache = kzalloc(sizeof(*flush_cache), GFP_KERNEL); + if (!flush_cache) + return -ENOMEM; + + flush_cache->shutdown_event = shutdown_event; + + rc = pqi_send_ctrl_raid_request(ctrl_info, SA_FLUSH_CACHE, flush_cache, + sizeof(*flush_cache)); + + kfree(flush_cache); + + return rc; +} + +int pqi_csmi_smp_passthru(struct pqi_ctrl_info *ctrl_info, + struct bmic_csmi_smp_passthru_buffer *buffer, size_t buffer_length, + struct pqi_raid_error_info *error_info) +{ + return pqi_send_ctrl_raid_with_error(ctrl_info, BMIC_CSMI_PASSTHRU, + buffer, buffer_length, error_info); +} + +#define PQI_FETCH_PTRAID_DATA (1 << 31) + +static int pqi_set_diag_rescan(struct pqi_ctrl_info *ctrl_info) +{ + int rc; + struct bmic_diag_options *diag; + + diag = kzalloc(sizeof(*diag), GFP_KERNEL); + if (!diag) + return -ENOMEM; + + rc = pqi_send_ctrl_raid_request(ctrl_info, BMIC_SENSE_DIAG_OPTIONS, + diag, sizeof(*diag)); + if (rc) + goto out; + + diag->options |= cpu_to_le32(PQI_FETCH_PTRAID_DATA); + + rc = pqi_send_ctrl_raid_request(ctrl_info, BMIC_SET_DIAG_OPTIONS, diag, + sizeof(*diag)); + +out: + kfree(diag); + + return rc; +} + +static inline int pqi_write_host_wellness(struct pqi_ctrl_info *ctrl_info, + void *buffer, size_t buffer_length) +{ + return pqi_send_ctrl_raid_request(ctrl_info, BMIC_WRITE_HOST_WELLNESS, + buffer, buffer_length); +} + +#pragma pack(1) + +struct bmic_host_wellness_driver_version { + u8 start_tag[4]; + u8 driver_version_tag[2]; + __le16 driver_version_length; + char driver_version[32]; + u8 dont_write_tag[2]; + u8 end_tag[2]; +}; + +#pragma pack() + +static int pqi_write_driver_version_to_host_wellness( + struct pqi_ctrl_info *ctrl_info) +{ + int rc; + struct bmic_host_wellness_driver_version *buffer; + size_t buffer_length; + + buffer_length = sizeof(*buffer); + + buffer = kmalloc(buffer_length, GFP_KERNEL); + if (!buffer) + return -ENOMEM; + + buffer->start_tag[0] = '<'; + buffer->start_tag[1] = 'H'; + buffer->start_tag[2] = 'W'; + buffer->start_tag[3] = '>'; + buffer->driver_version_tag[0] = 'D'; + buffer->driver_version_tag[1] = 'V'; + put_unaligned_le16(sizeof(buffer->driver_version), + &buffer->driver_version_length); + strncpy(buffer->driver_version, "Linux " DRIVER_VERSION, + sizeof(buffer->driver_version) - 1); + buffer->driver_version[sizeof(buffer->driver_version) - 1] = '\0'; + buffer->dont_write_tag[0] = 'D'; + buffer->dont_write_tag[1] = 'W'; + buffer->end_tag[0] = 'Z'; + buffer->end_tag[1] = 'Z'; + + rc = pqi_write_host_wellness(ctrl_info, buffer, buffer_length); + + kfree(buffer); + + return rc; +} + +#pragma pack(1) + +struct bmic_host_wellness_time { + u8 start_tag[4]; + u8 time_tag[2]; + __le16 time_length; + u8 time[8]; + u8 dont_write_tag[2]; + u8 end_tag[2]; +}; + +#pragma pack() + +static int pqi_write_current_time_to_host_wellness( + struct pqi_ctrl_info *ctrl_info) +{ + int rc; + struct bmic_host_wellness_time *buffer; + size_t buffer_length; + time64_t local_time; + unsigned int year; + struct tm tm; + + buffer_length = sizeof(*buffer); + + buffer = kmalloc(buffer_length, GFP_KERNEL); + if (!buffer) + return -ENOMEM; + + buffer->start_tag[0] = '<'; + buffer->start_tag[1] = 'H'; + buffer->start_tag[2] = 'W'; + buffer->start_tag[3] = '>'; + buffer->time_tag[0] = 'T'; + buffer->time_tag[1] = 'D'; + put_unaligned_le16(sizeof(buffer->time), + &buffer->time_length); + + local_time = ktime_get_real_seconds(); + time64_to_tm(local_time, -sys_tz.tz_minuteswest * 60, &tm); + year = tm.tm_year + 1900; + + buffer->time[0] = bin2bcd(tm.tm_hour); + buffer->time[1] = bin2bcd(tm.tm_min); + buffer->time[2] = bin2bcd(tm.tm_sec); + buffer->time[3] = 0; + buffer->time[4] = bin2bcd(tm.tm_mon + 1); + buffer->time[5] = bin2bcd(tm.tm_mday); + buffer->time[6] = bin2bcd(year / 100); + buffer->time[7] = bin2bcd(year % 100); + + buffer->dont_write_tag[0] = 'D'; + buffer->dont_write_tag[1] = 'W'; + buffer->end_tag[0] = 'Z'; + buffer->end_tag[1] = 'Z'; + + rc = pqi_write_host_wellness(ctrl_info, buffer, buffer_length); + + kfree(buffer); + + return rc; +} + +#define PQI_UPDATE_TIME_WORK_INTERVAL (24UL * 60 * 60 * PQI_HZ) + +static void pqi_update_time_worker(struct work_struct *work) +{ + int rc; + struct pqi_ctrl_info *ctrl_info; + + ctrl_info = container_of(to_delayed_work(work), struct pqi_ctrl_info, + update_time_work); + + if (pqi_ctrl_offline(ctrl_info)) + return; + + rc = pqi_write_current_time_to_host_wellness(ctrl_info); + if (rc) + dev_warn(&ctrl_info->pci_dev->dev, + "error updating time on controller\n"); + + schedule_delayed_work(&ctrl_info->update_time_work, + PQI_UPDATE_TIME_WORK_INTERVAL); +} + +static inline void pqi_schedule_update_time_worker( + struct pqi_ctrl_info *ctrl_info) +{ + schedule_delayed_work(&ctrl_info->update_time_work, 0); +} + +static inline void pqi_cancel_update_time_worker( + struct pqi_ctrl_info *ctrl_info) +{ + cancel_delayed_work_sync(&ctrl_info->update_time_work); +} + +static inline int pqi_report_luns(struct pqi_ctrl_info *ctrl_info, u8 cmd, + void *buffer, size_t buffer_length) +{ + return pqi_send_ctrl_raid_request(ctrl_info, cmd, buffer, + buffer_length); +} + +static int pqi_report_phys_logical_luns(struct pqi_ctrl_info *ctrl_info, u8 cmd, + void **buffer) +{ + int rc; + size_t lun_list_length; + size_t lun_data_length; + size_t new_lun_list_length; + void *lun_data = NULL; + struct report_lun_header *report_lun_header; + + report_lun_header = kmalloc(sizeof(*report_lun_header), GFP_KERNEL); + if (!report_lun_header) { + rc = -ENOMEM; + goto out; + } + + rc = pqi_report_luns(ctrl_info, cmd, report_lun_header, + sizeof(*report_lun_header)); + if (rc) + goto out; + + lun_list_length = get_unaligned_be32(&report_lun_header->list_length); + +again: + lun_data_length = sizeof(struct report_lun_header) + lun_list_length; + + lun_data = kmalloc(lun_data_length, GFP_KERNEL); + if (!lun_data) { + rc = -ENOMEM; + goto out; + } + + if (lun_list_length == 0) { + memcpy(lun_data, report_lun_header, sizeof(*report_lun_header)); + goto out; + } + + rc = pqi_report_luns(ctrl_info, cmd, lun_data, lun_data_length); + if (rc) + goto out; + + new_lun_list_length = get_unaligned_be32( + &((struct report_lun_header *)lun_data)->list_length); + + if (new_lun_list_length > lun_list_length) { + lun_list_length = new_lun_list_length; + kfree(lun_data); + goto again; + } + +out: + kfree(report_lun_header); + + if (rc) { + kfree(lun_data); + lun_data = NULL; + } + + *buffer = lun_data; + + return rc; +} + +static inline int pqi_report_phys_luns(struct pqi_ctrl_info *ctrl_info, + void **buffer) +{ + return pqi_report_phys_logical_luns(ctrl_info, CISS_REPORT_PHYS, + buffer); +} + +static inline int pqi_report_logical_luns(struct pqi_ctrl_info *ctrl_info, + void **buffer) +{ + return pqi_report_phys_logical_luns(ctrl_info, CISS_REPORT_LOG, buffer); +} + +static int pqi_get_device_lists(struct pqi_ctrl_info *ctrl_info, + struct report_phys_lun_extended **physdev_list, + struct report_log_lun_extended **logdev_list) +{ + int rc; + size_t logdev_list_length; + size_t logdev_data_length; + struct report_log_lun_extended *internal_logdev_list; + struct report_log_lun_extended *logdev_data; + struct report_lun_header report_lun_header; + + rc = pqi_report_phys_luns(ctrl_info, (void **)physdev_list); + if (rc) + dev_err(&ctrl_info->pci_dev->dev, + "report physical LUNs failed\n"); + + rc = pqi_report_logical_luns(ctrl_info, (void **)logdev_list); + if (rc) + dev_err(&ctrl_info->pci_dev->dev, + "report logical LUNs failed\n"); + + /* + * Tack the controller itself onto the end of the logical device list. + */ + + logdev_data = *logdev_list; + + if (logdev_data) { + logdev_list_length = + get_unaligned_be32(&logdev_data->header.list_length); + } else { + memset(&report_lun_header, 0, sizeof(report_lun_header)); + logdev_data = + (struct report_log_lun_extended *)&report_lun_header; + logdev_list_length = 0; + } + + logdev_data_length = sizeof(struct report_lun_header) + + logdev_list_length; + + internal_logdev_list = kmalloc(logdev_data_length + + sizeof(struct report_log_lun_extended), GFP_KERNEL); + if (!internal_logdev_list) { + kfree(*logdev_list); + *logdev_list = NULL; + return -ENOMEM; + } + + memcpy(internal_logdev_list, logdev_data, logdev_data_length); + memset((u8 *)internal_logdev_list + logdev_data_length, 0, + sizeof(struct report_log_lun_extended_entry)); + put_unaligned_be32(logdev_list_length + + sizeof(struct report_log_lun_extended_entry), + &internal_logdev_list->header.list_length); + + kfree(*logdev_list); + *logdev_list = internal_logdev_list; + + return 0; +} + +static inline void pqi_set_bus_target_lun(struct pqi_scsi_dev *device, + int bus, int target, int lun) +{ + device->bus = bus; + device->target = target; + device->lun = lun; +} + +static void pqi_assign_bus_target_lun(struct pqi_scsi_dev *device) +{ + u8 *scsi3addr; + u32 lunid; + int bus; + int target; + int lun; + + scsi3addr = device->scsi3addr; + lunid = get_unaligned_le32(scsi3addr); + + if (pqi_is_hba_lunid(scsi3addr)) { + /* The specified device is the controller. */ + pqi_set_bus_target_lun(device, PQI_HBA_BUS, 0, lunid & 0x3fff); + device->target_lun_valid = true; + return; + } + + if (pqi_is_logical_device(device)) { + if (device->is_external_raid_device) { + bus = PQI_EXTERNAL_RAID_VOLUME_BUS; + target = (lunid >> 16) & 0x3fff; + lun = lunid & 0xff; + } else { + bus = PQI_RAID_VOLUME_BUS; + target = 0; + lun = lunid & 0x3fff; + } + pqi_set_bus_target_lun(device, bus, target, lun); + device->target_lun_valid = true; + return; + } + + /* + * Defer target and LUN assignment for non-controller physical devices + * because the SAS transport layer will make these assignments later. + */ + pqi_set_bus_target_lun(device, PQI_PHYSICAL_DEVICE_BUS, 0, 0); +} + +static void pqi_get_raid_level(struct pqi_ctrl_info *ctrl_info, + struct pqi_scsi_dev *device) +{ + int rc; + u8 raid_level; + u8 *buffer; + + raid_level = SA_RAID_UNKNOWN; + + buffer = kmalloc(64, GFP_KERNEL); + if (buffer) { + rc = pqi_scsi_inquiry(ctrl_info, device->scsi3addr, + VPD_PAGE | CISS_VPD_LV_DEVICE_GEOMETRY, buffer, 64); + if (rc == 0) { + raid_level = buffer[8]; + if (raid_level > SA_RAID_MAX) + raid_level = SA_RAID_UNKNOWN; + } + kfree(buffer); + } + + device->raid_level = raid_level; +} + +static int pqi_validate_raid_map(struct pqi_ctrl_info *ctrl_info, + struct pqi_scsi_dev *device, struct raid_map *raid_map) +{ + char *err_msg; + u32 raid_map_size; + u32 r5or6_blocks_per_row; + + raid_map_size = get_unaligned_le32(&raid_map->structure_size); + + if (raid_map_size < offsetof(struct raid_map, disk_data)) { + err_msg = "RAID map too small"; + goto bad_raid_map; + } + + if (device->raid_level == SA_RAID_1) { + if (get_unaligned_le16(&raid_map->layout_map_count) != 2) { + err_msg = "invalid RAID-1 map"; + goto bad_raid_map; + } + } else if (device->raid_level == SA_RAID_ADM) { + if (get_unaligned_le16(&raid_map->layout_map_count) != 3) { + err_msg = "invalid RAID-1(ADM) map"; + goto bad_raid_map; + } + } else if ((device->raid_level == SA_RAID_5 || + device->raid_level == SA_RAID_6) && + get_unaligned_le16(&raid_map->layout_map_count) > 1) { + /* RAID 50/60 */ + r5or6_blocks_per_row = + get_unaligned_le16(&raid_map->strip_size) * + get_unaligned_le16(&raid_map->data_disks_per_row); + if (r5or6_blocks_per_row == 0) { + err_msg = "invalid RAID-5 or RAID-6 map"; + goto bad_raid_map; + } + } + + return 0; + +bad_raid_map: + dev_warn(&ctrl_info->pci_dev->dev, + "logical device %08x%08x %s\n", + *((u32 *)&device->scsi3addr), + *((u32 *)&device->scsi3addr[4]), err_msg); + + return -EINVAL; +} + +static int pqi_get_raid_map(struct pqi_ctrl_info *ctrl_info, + struct pqi_scsi_dev *device) +{ + int rc; + u32 raid_map_size; + struct raid_map *raid_map; + + raid_map = kmalloc(sizeof(*raid_map), GFP_KERNEL); + if (!raid_map) + return -ENOMEM; + + rc = pqi_send_scsi_raid_request(ctrl_info, CISS_GET_RAID_MAP, + device->scsi3addr, raid_map, sizeof(*raid_map), + 0, NULL, NO_TIMEOUT); + + if (rc) + goto error; + + raid_map_size = get_unaligned_le32(&raid_map->structure_size); + + if (raid_map_size > sizeof(*raid_map)) { + + kfree(raid_map); + + raid_map = kmalloc(raid_map_size, GFP_KERNEL); + if (!raid_map) + return -ENOMEM; + + rc = pqi_send_scsi_raid_request(ctrl_info, CISS_GET_RAID_MAP, + device->scsi3addr, raid_map, raid_map_size, + 0, NULL, NO_TIMEOUT); + if (rc) + goto error; + + if (get_unaligned_le32(&raid_map->structure_size) + != raid_map_size) { + dev_warn(&ctrl_info->pci_dev->dev, + "Requested %d bytes, received %d bytes", + raid_map_size, + get_unaligned_le32(&raid_map->structure_size)); + rc = -EINVAL; + goto error; + } + } + + rc = pqi_validate_raid_map(ctrl_info, device, raid_map); + if (rc) + goto error; + + device->raid_map = raid_map; + + return 0; + +error: + kfree(raid_map); + + return rc; +} + +static void pqi_get_raid_bypass_status(struct pqi_ctrl_info *ctrl_info, + struct pqi_scsi_dev *device) +{ + int rc; + u8 *buffer; + u8 bypass_status; + + buffer = kmalloc(64, GFP_KERNEL); + if (!buffer) + return; + + rc = pqi_scsi_inquiry(ctrl_info, device->scsi3addr, + VPD_PAGE | CISS_VPD_LV_BYPASS_STATUS, buffer, 64); + if (rc) + goto out; + +#define RAID_BYPASS_STATUS 4 +#define RAID_BYPASS_CONFIGURED 0x1 +#define RAID_BYPASS_ENABLED 0x2 + + bypass_status = buffer[RAID_BYPASS_STATUS]; + device->raid_bypass_configured = + (bypass_status & RAID_BYPASS_CONFIGURED) != 0; + if (device->raid_bypass_configured && + (bypass_status & RAID_BYPASS_ENABLED) && + pqi_get_raid_map(ctrl_info, device) == 0) + device->raid_bypass_enabled = true; + +out: + kfree(buffer); +} + +/* + * Use vendor-specific VPD to determine online/offline status of a volume. + */ + +static void pqi_get_volume_status(struct pqi_ctrl_info *ctrl_info, + struct pqi_scsi_dev *device) +{ + int rc; + size_t page_length; + u8 volume_status = CISS_LV_STATUS_UNAVAILABLE; + bool volume_offline = true; + u32 volume_flags; + struct ciss_vpd_logical_volume_status *vpd; + + vpd = kmalloc(sizeof(*vpd), GFP_KERNEL); + if (!vpd) + goto no_buffer; + + rc = pqi_scsi_inquiry(ctrl_info, device->scsi3addr, + VPD_PAGE | CISS_VPD_LV_STATUS, vpd, sizeof(*vpd)); + if (rc) + goto out; + + if (vpd->page_code != CISS_VPD_LV_STATUS) + goto out; + + page_length = offsetof(struct ciss_vpd_logical_volume_status, + volume_status) + vpd->page_length; + if (page_length < sizeof(*vpd)) + goto out; + + volume_status = vpd->volume_status; + volume_flags = get_unaligned_be32(&vpd->flags); + volume_offline = (volume_flags & CISS_LV_FLAGS_NO_HOST_IO) != 0; + +out: + kfree(vpd); +no_buffer: + device->volume_status = volume_status; + device->volume_offline = volume_offline; +} + +static int pqi_get_physical_device_info(struct pqi_ctrl_info *ctrl_info, + struct pqi_scsi_dev *device, + struct bmic_identify_physical_device *id_phys) +{ + int rc; + + memset(id_phys, 0, sizeof(*id_phys)); + + rc = pqi_identify_physical_device(ctrl_info, device, + id_phys, sizeof(*id_phys)); + if (rc) { + device->queue_depth = PQI_PHYSICAL_DISK_DEFAULT_MAX_QUEUE_DEPTH; + return rc; + } + + scsi_sanitize_inquiry_string(&id_phys->model[0], 8); + scsi_sanitize_inquiry_string(&id_phys->model[8], 16); + + memcpy(device->vendor, &id_phys->model[0], sizeof(device->vendor)); + memcpy(device->model, &id_phys->model[8], sizeof(device->model)); + + device->box_index = id_phys->box_index; + device->phys_box_on_bus = id_phys->phys_box_on_bus; + device->phy_connected_dev_type = id_phys->phy_connected_dev_type[0]; + device->queue_depth = + get_unaligned_le16(&id_phys->current_queue_depth_limit); + device->active_path_index = id_phys->active_path_number; + device->path_map = id_phys->redundant_path_present_map; + memcpy(&device->box, + &id_phys->alternate_paths_phys_box_on_port, + sizeof(device->box)); + memcpy(&device->phys_connector, + &id_phys->alternate_paths_phys_connector, + sizeof(device->phys_connector)); + device->bay = id_phys->phys_bay_in_box; + + return 0; +} + +static int pqi_get_logical_device_info(struct pqi_ctrl_info *ctrl_info, + struct pqi_scsi_dev *device) +{ + int rc; + u8 *buffer; + + buffer = kmalloc(64, GFP_KERNEL); + if (!buffer) + return -ENOMEM; + + /* Send an inquiry to the device to see what it is. */ + rc = pqi_scsi_inquiry(ctrl_info, device->scsi3addr, 0, buffer, 64); + if (rc) + goto out; + + scsi_sanitize_inquiry_string(&buffer[8], 8); + scsi_sanitize_inquiry_string(&buffer[16], 16); + + device->devtype = buffer[0] & 0x1f; + memcpy(device->vendor, &buffer[8], sizeof(device->vendor)); + memcpy(device->model, &buffer[16], sizeof(device->model)); + + if (device->devtype == TYPE_DISK) { + if (device->is_external_raid_device) { + device->raid_level = SA_RAID_UNKNOWN; + device->volume_status = CISS_LV_OK; + device->volume_offline = false; + } else { + pqi_get_raid_level(ctrl_info, device); + pqi_get_raid_bypass_status(ctrl_info, device); + pqi_get_volume_status(ctrl_info, device); + } + } + +out: + kfree(buffer); + + return rc; +} + +static int pqi_get_device_info(struct pqi_ctrl_info *ctrl_info, + struct pqi_scsi_dev *device, + struct bmic_identify_physical_device *id_phys) +{ + int rc; + + if (device->is_expander_smp_device) + return 0; + + if (pqi_is_logical_device(device)) + rc = pqi_get_logical_device_info(ctrl_info, device); + else + rc = pqi_get_physical_device_info(ctrl_info, device, id_phys); + + return rc; +} + +static void pqi_show_volume_status(struct pqi_ctrl_info *ctrl_info, + struct pqi_scsi_dev *device) +{ + char *status; + static const char unknown_state_str[] = + "Volume is in an unknown state (%u)"; + char unknown_state_buffer[sizeof(unknown_state_str) + 10]; + + switch (device->volume_status) { + case CISS_LV_OK: + status = "Volume online"; + break; + case CISS_LV_FAILED: + status = "Volume failed"; + break; + case CISS_LV_NOT_CONFIGURED: + status = "Volume not configured"; + break; + case CISS_LV_DEGRADED: + status = "Volume degraded"; + break; + case CISS_LV_READY_FOR_RECOVERY: + status = "Volume ready for recovery operation"; + break; + case CISS_LV_UNDERGOING_RECOVERY: + status = "Volume undergoing recovery"; + break; + case CISS_LV_WRONG_PHYSICAL_DRIVE_REPLACED: + status = "Wrong physical drive was replaced"; + break; + case CISS_LV_PHYSICAL_DRIVE_CONNECTION_PROBLEM: + status = "A physical drive not properly connected"; + break; + case CISS_LV_HARDWARE_OVERHEATING: + status = "Hardware is overheating"; + break; + case CISS_LV_HARDWARE_HAS_OVERHEATED: + status = "Hardware has overheated"; + break; + case CISS_LV_UNDERGOING_EXPANSION: + status = "Volume undergoing expansion"; + break; + case CISS_LV_NOT_AVAILABLE: + status = "Volume waiting for transforming volume"; + break; + case CISS_LV_QUEUED_FOR_EXPANSION: + status = "Volume queued for expansion"; + break; + case CISS_LV_DISABLED_SCSI_ID_CONFLICT: + status = "Volume disabled due to SCSI ID conflict"; + break; + case CISS_LV_EJECTED: + status = "Volume has been ejected"; + break; + case CISS_LV_UNDERGOING_ERASE: + status = "Volume undergoing background erase"; + break; + case CISS_LV_READY_FOR_PREDICTIVE_SPARE_REBUILD: + status = "Volume ready for predictive spare rebuild"; + break; + case CISS_LV_UNDERGOING_RPI: + status = "Volume undergoing rapid parity initialization"; + break; + case CISS_LV_PENDING_RPI: + status = "Volume queued for rapid parity initialization"; + break; + case CISS_LV_ENCRYPTED_NO_KEY: + status = "Encrypted volume inaccessible - key not present"; + break; + case CISS_LV_UNDERGOING_ENCRYPTION: + status = "Volume undergoing encryption process"; + break; + case CISS_LV_UNDERGOING_ENCRYPTION_REKEYING: + status = "Volume undergoing encryption re-keying process"; + break; + case CISS_LV_ENCRYPTED_IN_NON_ENCRYPTED_CONTROLLER: + status = "Volume encrypted but encryption is disabled"; + break; + case CISS_LV_PENDING_ENCRYPTION: + status = "Volume pending migration to encrypted state"; + break; + case CISS_LV_PENDING_ENCRYPTION_REKEYING: + status = "Volume pending encryption rekeying"; + break; + case CISS_LV_NOT_SUPPORTED: + status = "Volume not supported on this controller"; + break; + case CISS_LV_STATUS_UNAVAILABLE: + status = "Volume status not available"; + break; + default: + snprintf(unknown_state_buffer, sizeof(unknown_state_buffer), + unknown_state_str, device->volume_status); + status = unknown_state_buffer; + break; + } + + dev_info(&ctrl_info->pci_dev->dev, + "scsi %d:%d:%d:%d %s\n", + ctrl_info->scsi_host->host_no, + device->bus, device->target, device->lun, status); +} + +static void pqi_rescan_worker(struct work_struct *work) +{ + struct pqi_ctrl_info *ctrl_info; + + ctrl_info = container_of(to_delayed_work(work), struct pqi_ctrl_info, + rescan_work); + + pqi_scan_scsi_devices(ctrl_info); +} + +static int pqi_add_device(struct pqi_ctrl_info *ctrl_info, + struct pqi_scsi_dev *device) +{ + int rc; + + if (pqi_is_logical_device(device)) + rc = scsi_add_device(ctrl_info->scsi_host, device->bus, + device->target, device->lun); + else + rc = pqi_add_sas_device(ctrl_info->sas_host, device); + + return rc; +} + +#define PQI_PENDING_IO_TIMEOUT_SECS 20 + +static inline void pqi_remove_device(struct pqi_ctrl_info *ctrl_info, + struct pqi_scsi_dev *device) +{ + int rc; + + pqi_device_remove_start(device); + + rc = pqi_device_wait_for_pending_io(ctrl_info, device, PQI_PENDING_IO_TIMEOUT_SECS); + if (rc) + dev_err(&ctrl_info->pci_dev->dev, + "scsi %d:%d:%d:%d removing device with %d outstanding command(s)\n", + ctrl_info->scsi_host->host_no, device->bus, + device->target, device->lun, + atomic_read(&device->scsi_cmds_outstanding)); + + if (pqi_is_logical_device(device)) + scsi_remove_device(device->sdev); + else + pqi_remove_sas_device(device); +} + +/* Assumes the SCSI device list lock is held. */ + +static struct pqi_scsi_dev *pqi_find_scsi_dev(struct pqi_ctrl_info *ctrl_info, + int bus, int target, int lun) +{ + struct pqi_scsi_dev *device; + + list_for_each_entry(device, &ctrl_info->scsi_device_list, scsi_device_list_entry) + if (device->bus == bus && device->target == target && device->lun == lun) + return device; + + return NULL; +} + +static inline bool pqi_device_equal(struct pqi_scsi_dev *dev1, + struct pqi_scsi_dev *dev2) +{ + if (dev1->is_physical_device != dev2->is_physical_device) + return false; + + if (dev1->is_physical_device) + return dev1->wwid == dev2->wwid; + + return memcmp(dev1->volume_id, dev2->volume_id, + sizeof(dev1->volume_id)) == 0; +} + +enum pqi_find_result { + DEVICE_NOT_FOUND, + DEVICE_CHANGED, + DEVICE_SAME, +}; + +static enum pqi_find_result pqi_scsi_find_entry(struct pqi_ctrl_info *ctrl_info, + struct pqi_scsi_dev *device_to_find, struct pqi_scsi_dev **matching_device) +{ + struct pqi_scsi_dev *device; + + list_for_each_entry(device, &ctrl_info->scsi_device_list, scsi_device_list_entry) { + if (pqi_scsi3addr_equal(device_to_find->scsi3addr, device->scsi3addr)) { + *matching_device = device; + if (pqi_device_equal(device_to_find, device)) { + if (device_to_find->volume_offline) + return DEVICE_CHANGED; + return DEVICE_SAME; + } + return DEVICE_CHANGED; + } + } + + return DEVICE_NOT_FOUND; +} + +static inline const char *pqi_device_type(struct pqi_scsi_dev *device) +{ + if (device->is_expander_smp_device) + return "Enclosure SMP "; + + return scsi_device_type(device->devtype); +} + +#define PQI_DEV_INFO_BUFFER_LENGTH 128 + +static void pqi_dev_info(struct pqi_ctrl_info *ctrl_info, + char *action, struct pqi_scsi_dev *device) +{ + ssize_t count; + char buffer[PQI_DEV_INFO_BUFFER_LENGTH]; + + count = snprintf(buffer, PQI_DEV_INFO_BUFFER_LENGTH, + "%d:%d:", ctrl_info->scsi_host->host_no, device->bus); + + if (device->target_lun_valid) + count += scnprintf(buffer + count, + PQI_DEV_INFO_BUFFER_LENGTH - count, + "%d:%d", + device->target, + device->lun); + else + count += scnprintf(buffer + count, + PQI_DEV_INFO_BUFFER_LENGTH - count, + "-:-"); + + if (pqi_is_logical_device(device)) + count += scnprintf(buffer + count, + PQI_DEV_INFO_BUFFER_LENGTH - count, + " %08x%08x", + *((u32 *)&device->scsi3addr), + *((u32 *)&device->scsi3addr[4])); + else + count += scnprintf(buffer + count, + PQI_DEV_INFO_BUFFER_LENGTH - count, + " %016llx", device->sas_address); + + count += scnprintf(buffer + count, PQI_DEV_INFO_BUFFER_LENGTH - count, + " %s %.8s %.16s ", + pqi_device_type(device), + device->vendor, + device->model); + + if (pqi_is_logical_device(device)) { + if (device->devtype == TYPE_DISK) + count += scnprintf(buffer + count, + PQI_DEV_INFO_BUFFER_LENGTH - count, + "SSDSmartPathCap%c En%c %-12s", + device->raid_bypass_configured ? '+' : '-', + device->raid_bypass_enabled ? '+' : '-', + pqi_raid_level_to_string(device->raid_level)); + } else { + count += scnprintf(buffer + count, + PQI_DEV_INFO_BUFFER_LENGTH - count, + "AIO%c", device->aio_enabled ? '+' : '-'); + if (device->devtype == TYPE_DISK || + device->devtype == TYPE_ZBC) + count += scnprintf(buffer + count, + PQI_DEV_INFO_BUFFER_LENGTH - count, + " qd=%-6d", device->queue_depth); + } + + dev_info(&ctrl_info->pci_dev->dev, "%s %s\n", action, buffer); +} + +/* Assumes the SCSI device list lock is held. */ + +static void pqi_scsi_update_device(struct pqi_scsi_dev *existing_device, + struct pqi_scsi_dev *new_device) +{ + existing_device->devtype = new_device->devtype; + existing_device->device_type = new_device->device_type; + existing_device->bus = new_device->bus; + if (new_device->target_lun_valid) { + existing_device->target = new_device->target; + existing_device->lun = new_device->lun; + existing_device->target_lun_valid = true; + } + + if ((existing_device->volume_status == CISS_LV_QUEUED_FOR_EXPANSION || + existing_device->volume_status == CISS_LV_UNDERGOING_EXPANSION) && + new_device->volume_status == CISS_LV_OK) + existing_device->rescan = true; + + /* By definition, the scsi3addr and wwid fields are already the same. */ + + existing_device->is_physical_device = new_device->is_physical_device; + existing_device->is_external_raid_device = + new_device->is_external_raid_device; + existing_device->is_expander_smp_device = + new_device->is_expander_smp_device; + existing_device->aio_enabled = new_device->aio_enabled; + memcpy(existing_device->vendor, new_device->vendor, + sizeof(existing_device->vendor)); + memcpy(existing_device->model, new_device->model, + sizeof(existing_device->model)); + existing_device->sas_address = new_device->sas_address; + existing_device->raid_level = new_device->raid_level; + existing_device->queue_depth = new_device->queue_depth; + existing_device->aio_handle = new_device->aio_handle; + existing_device->volume_status = new_device->volume_status; + existing_device->active_path_index = new_device->active_path_index; + existing_device->path_map = new_device->path_map; + existing_device->bay = new_device->bay; + existing_device->box_index = new_device->box_index; + existing_device->phys_box_on_bus = new_device->phys_box_on_bus; + existing_device->phy_connected_dev_type = + new_device->phy_connected_dev_type; + memcpy(existing_device->box, new_device->box, + sizeof(existing_device->box)); + memcpy(existing_device->phys_connector, new_device->phys_connector, + sizeof(existing_device->phys_connector)); + existing_device->offload_to_mirror = 0; + kfree(existing_device->raid_map); + existing_device->raid_map = new_device->raid_map; + existing_device->raid_bypass_configured = + new_device->raid_bypass_configured; + existing_device->raid_bypass_enabled = + new_device->raid_bypass_enabled; + existing_device->device_offline = false; + + /* To prevent this from being freed later. */ + new_device->raid_map = NULL; +} + +static inline void pqi_free_device(struct pqi_scsi_dev *device) +{ + if (device) { + kfree(device->raid_map); + kfree(device); + } +} + +/* + * Called when exposing a new device to the OS fails in order to re-adjust + * our internal SCSI device list to match the SCSI ML's view. + */ + +static inline void pqi_fixup_botched_add(struct pqi_ctrl_info *ctrl_info, + struct pqi_scsi_dev *device) +{ + unsigned long flags; + + spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags); + list_del(&device->scsi_device_list_entry); + spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags); + + /* Allow the device structure to be freed later. */ + device->keep_device = false; +} + +static inline bool pqi_is_device_added(struct pqi_scsi_dev *device) +{ + if (device->is_expander_smp_device) + return device->sas_port != NULL; + + return device->sdev != NULL; +} + +static void pqi_update_device_list(struct pqi_ctrl_info *ctrl_info, + struct pqi_scsi_dev *new_device_list[], unsigned int num_new_devices) +{ + int rc; + unsigned int i; + unsigned long flags; + enum pqi_find_result find_result; + struct pqi_scsi_dev *device; + struct pqi_scsi_dev *next; + struct pqi_scsi_dev *matching_device; + LIST_HEAD(add_list); + LIST_HEAD(delete_list); + + /* + * The idea here is to do as little work as possible while holding the + * spinlock. That's why we go to great pains to defer anything other + * than updating the internal device list until after we release the + * spinlock. + */ + + spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags); + + /* Assume that all devices in the existing list have gone away. */ + list_for_each_entry(device, &ctrl_info->scsi_device_list, scsi_device_list_entry) + device->device_gone = true; + + for (i = 0; i < num_new_devices; i++) { + device = new_device_list[i]; + + find_result = pqi_scsi_find_entry(ctrl_info, device, + &matching_device); + + switch (find_result) { + case DEVICE_SAME: + /* + * The newly found device is already in the existing + * device list. + */ + device->new_device = false; + matching_device->device_gone = false; + pqi_scsi_update_device(matching_device, device); + break; + case DEVICE_NOT_FOUND: + /* + * The newly found device is NOT in the existing device + * list. + */ + device->new_device = true; + break; + case DEVICE_CHANGED: + /* + * The original device has gone away and we need to add + * the new device. + */ + device->new_device = true; + break; + } + } + + /* Process all devices that have gone away. */ + list_for_each_entry_safe(device, next, &ctrl_info->scsi_device_list, + scsi_device_list_entry) { + if (device->device_gone) { + list_del_init(&device->scsi_device_list_entry); + list_add_tail(&device->delete_list_entry, &delete_list); + } + } + + /* Process all new devices. */ + for (i = 0; i < num_new_devices; i++) { + device = new_device_list[i]; + if (!device->new_device) + continue; + if (device->volume_offline) + continue; + list_add_tail(&device->scsi_device_list_entry, + &ctrl_info->scsi_device_list); + list_add_tail(&device->add_list_entry, &add_list); + /* To prevent this device structure from being freed later. */ + device->keep_device = true; + } + + spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags); + + if (pqi_ctrl_in_ofa(ctrl_info)) + pqi_ctrl_ofa_done(ctrl_info); + + /* Remove all devices that have gone away. */ + list_for_each_entry_safe(device, next, &delete_list, delete_list_entry) { + if (device->volume_offline) { + pqi_dev_info(ctrl_info, "offline", device); + pqi_show_volume_status(ctrl_info, device); + } + list_del(&device->delete_list_entry); + if (pqi_is_device_added(device)) { + pqi_remove_device(ctrl_info, device); + } else { + if (!device->volume_offline) + pqi_dev_info(ctrl_info, "removed", device); + pqi_free_device(device); + } + } + + /* + * Notify the SCSI ML if the queue depth of any existing device has + * changed. + */ + list_for_each_entry(device, &ctrl_info->scsi_device_list, + scsi_device_list_entry) { + if (device->sdev) { + if (device->queue_depth != + device->advertised_queue_depth) { + device->advertised_queue_depth = device->queue_depth; + scsi_change_queue_depth(device->sdev, + device->advertised_queue_depth); + } + if (device->rescan) { + scsi_rescan_device(&device->sdev->sdev_gendev); + device->rescan = false; + } + } + } + + /* Expose any new devices. */ + list_for_each_entry_safe(device, next, &add_list, add_list_entry) { + if (!pqi_is_device_added(device)) { + rc = pqi_add_device(ctrl_info, device); + if (rc == 0) { + pqi_dev_info(ctrl_info, "added", device); + } else { + dev_warn(&ctrl_info->pci_dev->dev, + "scsi %d:%d:%d:%d addition failed, device not added\n", + ctrl_info->scsi_host->host_no, + device->bus, device->target, + device->lun); + pqi_fixup_botched_add(ctrl_info, device); + } + } + } +} + +static inline bool pqi_is_supported_device(struct pqi_scsi_dev *device) +{ + /* + * Only support the HBA controller itself as a RAID + * controller. If it's a RAID controller other than + * the HBA itself (an external RAID controller, for + * example), we don't support it. + */ + if (device->device_type == SA_DEVICE_TYPE_CONTROLLER && + !pqi_is_hba_lunid(device->scsi3addr)) + return false; + + return true; +} + +static inline bool pqi_skip_device(u8 *scsi3addr) +{ + /* Ignore all masked devices. */ + if (MASKED_DEVICE(scsi3addr)) + return true; + + return false; +} + +static inline void pqi_mask_device(u8 *scsi3addr) +{ + scsi3addr[3] |= 0xc0; +} + +static inline bool pqi_is_device_with_sas_address(struct pqi_scsi_dev *device) +{ + switch (device->device_type) { + case SA_DEVICE_TYPE_SAS: + case SA_DEVICE_TYPE_EXPANDER_SMP: + case SA_DEVICE_TYPE_SES: + return true; + } + + return false; +} + +static inline bool pqi_expose_device(struct pqi_scsi_dev *device) +{ + return !device->is_physical_device || + !pqi_skip_device(device->scsi3addr); +} + +static int pqi_update_scsi_devices(struct pqi_ctrl_info *ctrl_info) +{ + int i; + int rc; + LIST_HEAD(new_device_list_head); + struct report_phys_lun_extended *physdev_list = NULL; + struct report_log_lun_extended *logdev_list = NULL; + struct report_phys_lun_extended_entry *phys_lun_ext_entry; + struct report_log_lun_extended_entry *log_lun_ext_entry; + struct bmic_identify_physical_device *id_phys = NULL; + u32 num_physicals; + u32 num_logicals; + struct pqi_scsi_dev **new_device_list = NULL; + struct pqi_scsi_dev *device; + struct pqi_scsi_dev *next; + unsigned int num_new_devices; + unsigned int num_valid_devices; + bool is_physical_device; + u8 *scsi3addr; + unsigned int physical_index; + unsigned int logical_index; + static char *out_of_memory_msg = + "failed to allocate memory, device discovery stopped"; + + rc = pqi_get_device_lists(ctrl_info, &physdev_list, &logdev_list); + if (rc) + goto out; + + if (physdev_list) + num_physicals = + get_unaligned_be32(&physdev_list->header.list_length) + / sizeof(physdev_list->lun_entries[0]); + else + num_physicals = 0; + + if (logdev_list) + num_logicals = + get_unaligned_be32(&logdev_list->header.list_length) + / sizeof(logdev_list->lun_entries[0]); + else + num_logicals = 0; + + if (num_physicals) { + /* + * We need this buffer for calls to pqi_get_physical_disk_info() + * below. We allocate it here instead of inside + * pqi_get_physical_disk_info() because it's a fairly large + * buffer. + */ + id_phys = kmalloc(sizeof(*id_phys), GFP_KERNEL); + if (!id_phys) { + dev_warn(&ctrl_info->pci_dev->dev, "%s\n", + out_of_memory_msg); + rc = -ENOMEM; + goto out; + } + + if (pqi_hide_vsep) { + for (i = num_physicals - 1; i >= 0; i--) { + phys_lun_ext_entry = + &physdev_list->lun_entries[i]; + if (CISS_GET_DRIVE_NUMBER( + phys_lun_ext_entry->lunid) == + PQI_VSEP_CISS_BTL) { + pqi_mask_device( + phys_lun_ext_entry->lunid); + break; + } + } + } + } + + num_new_devices = num_physicals + num_logicals; + + new_device_list = kmalloc_array(num_new_devices, + sizeof(*new_device_list), + GFP_KERNEL); + if (!new_device_list) { + dev_warn(&ctrl_info->pci_dev->dev, "%s\n", out_of_memory_msg); + rc = -ENOMEM; + goto out; + } + + for (i = 0; i < num_new_devices; i++) { + device = kzalloc(sizeof(*device), GFP_KERNEL); + if (!device) { + dev_warn(&ctrl_info->pci_dev->dev, "%s\n", + out_of_memory_msg); + rc = -ENOMEM; + goto out; + } + list_add_tail(&device->new_device_list_entry, + &new_device_list_head); + } + + device = NULL; + num_valid_devices = 0; + physical_index = 0; + logical_index = 0; + + for (i = 0; i < num_new_devices; i++) { + + if ((!pqi_expose_ld_first && i < num_physicals) || + (pqi_expose_ld_first && i >= num_logicals)) { + is_physical_device = true; + phys_lun_ext_entry = + &physdev_list->lun_entries[physical_index++]; + log_lun_ext_entry = NULL; + scsi3addr = phys_lun_ext_entry->lunid; + } else { + is_physical_device = false; + phys_lun_ext_entry = NULL; + log_lun_ext_entry = + &logdev_list->lun_entries[logical_index++]; + scsi3addr = log_lun_ext_entry->lunid; + } + + if (is_physical_device && pqi_skip_device(scsi3addr)) + continue; + + if (device) + device = list_next_entry(device, new_device_list_entry); + else + device = list_first_entry(&new_device_list_head, + struct pqi_scsi_dev, new_device_list_entry); + + memcpy(device->scsi3addr, scsi3addr, sizeof(device->scsi3addr)); + device->is_physical_device = is_physical_device; + if (is_physical_device) { + device->device_type = phys_lun_ext_entry->device_type; + if (device->device_type == SA_DEVICE_TYPE_EXPANDER_SMP) + device->is_expander_smp_device = true; + } else { + device->is_external_raid_device = + pqi_is_external_raid_addr(scsi3addr); + } + + if (!pqi_is_supported_device(device)) + continue; + + /* Gather information about the device. */ + rc = pqi_get_device_info(ctrl_info, device, id_phys); + if (rc == -ENOMEM) { + dev_warn(&ctrl_info->pci_dev->dev, "%s\n", + out_of_memory_msg); + goto out; + } + if (rc) { + if (device->is_physical_device) + dev_warn(&ctrl_info->pci_dev->dev, + "obtaining device info failed, skipping physical device %016llx\n", + get_unaligned_be64( + &phys_lun_ext_entry->wwid)); + else + dev_warn(&ctrl_info->pci_dev->dev, + "obtaining device info failed, skipping logical device %08x%08x\n", + *((u32 *)&device->scsi3addr), + *((u32 *)&device->scsi3addr[4])); + rc = 0; + continue; + } + + pqi_assign_bus_target_lun(device); + + if (device->is_physical_device) { + device->wwid = phys_lun_ext_entry->wwid; + if ((phys_lun_ext_entry->device_flags & + CISS_REPORT_PHYS_DEV_FLAG_AIO_ENABLED) && + phys_lun_ext_entry->aio_handle) { + device->aio_enabled = true; + device->aio_handle = + phys_lun_ext_entry->aio_handle; + } + } else { + memcpy(device->volume_id, log_lun_ext_entry->volume_id, + sizeof(device->volume_id)); + } + + if (pqi_is_device_with_sas_address(device)) + device->sas_address = get_unaligned_be64(&device->wwid); + + new_device_list[num_valid_devices++] = device; + } + + pqi_update_device_list(ctrl_info, new_device_list, num_valid_devices); + +out: + list_for_each_entry_safe(device, next, &new_device_list_head, + new_device_list_entry) { + if (device->keep_device) + continue; + list_del(&device->new_device_list_entry); + pqi_free_device(device); + } + + kfree(new_device_list); + kfree(physdev_list); + kfree(logdev_list); + kfree(id_phys); + + return rc; +} + +static int pqi_scan_scsi_devices(struct pqi_ctrl_info *ctrl_info) +{ + int rc = 0; + + if (pqi_ctrl_offline(ctrl_info)) + return -ENXIO; + + if (!mutex_trylock(&ctrl_info->scan_mutex)) { + pqi_schedule_rescan_worker_delayed(ctrl_info); + rc = -EINPROGRESS; + } else { + rc = pqi_update_scsi_devices(ctrl_info); + if (rc) + pqi_schedule_rescan_worker_delayed(ctrl_info); + mutex_unlock(&ctrl_info->scan_mutex); + } + + return rc; +} + +static void pqi_scan_start(struct Scsi_Host *shost) +{ + struct pqi_ctrl_info *ctrl_info; + + ctrl_info = shost_to_hba(shost); + if (pqi_ctrl_in_ofa(ctrl_info)) + return; + + pqi_scan_scsi_devices(ctrl_info); +} + +/* Returns TRUE if scan is finished. */ + +static int pqi_scan_finished(struct Scsi_Host *shost, + unsigned long elapsed_time) +{ + struct pqi_ctrl_info *ctrl_info; + + ctrl_info = shost_priv(shost); + + return !mutex_is_locked(&ctrl_info->scan_mutex); +} + +static void pqi_wait_until_scan_finished(struct pqi_ctrl_info *ctrl_info) +{ + mutex_lock(&ctrl_info->scan_mutex); + mutex_unlock(&ctrl_info->scan_mutex); +} + +static void pqi_wait_until_lun_reset_finished(struct pqi_ctrl_info *ctrl_info) +{ + mutex_lock(&ctrl_info->lun_reset_mutex); + mutex_unlock(&ctrl_info->lun_reset_mutex); +} + +static void pqi_wait_until_ofa_finished(struct pqi_ctrl_info *ctrl_info) +{ + mutex_lock(&ctrl_info->ofa_mutex); + mutex_unlock(&ctrl_info->ofa_mutex); +} + +static inline void pqi_set_encryption_info( + struct pqi_encryption_info *encryption_info, struct raid_map *raid_map, + u64 first_block) +{ + u32 volume_blk_size; + + /* + * Set the encryption tweak values based on logical block address. + * If the block size is 512, the tweak value is equal to the LBA. + * For other block sizes, tweak value is (LBA * block size) / 512. + */ + volume_blk_size = get_unaligned_le32(&raid_map->volume_blk_size); + if (volume_blk_size != 512) + first_block = (first_block * volume_blk_size) / 512; + + encryption_info->data_encryption_key_index = + get_unaligned_le16(&raid_map->data_encryption_key_index); + encryption_info->encrypt_tweak_lower = lower_32_bits(first_block); + encryption_info->encrypt_tweak_upper = upper_32_bits(first_block); +} + +/* + * Attempt to perform RAID bypass mapping for a logical volume I/O. + */ + +#define PQI_RAID_BYPASS_INELIGIBLE 1 + +static int pqi_raid_bypass_submit_scsi_cmd(struct pqi_ctrl_info *ctrl_info, + struct pqi_scsi_dev *device, struct scsi_cmnd *scmd, + struct pqi_queue_group *queue_group) +{ + struct raid_map *raid_map; + bool is_write = false; + u32 map_index; + u64 first_block; + u64 last_block; + u32 block_cnt; + u32 blocks_per_row; + u64 first_row; + u64 last_row; + u32 first_row_offset; + u32 last_row_offset; + u32 first_column; + u32 last_column; + u64 r0_first_row; + u64 r0_last_row; + u32 r5or6_blocks_per_row; + u64 r5or6_first_row; + u64 r5or6_last_row; + u32 r5or6_first_row_offset; + u32 r5or6_last_row_offset; + u32 r5or6_first_column; + u32 r5or6_last_column; + u16 data_disks_per_row; + u32 total_disks_per_row; + u16 layout_map_count; + u32 stripesize; + u16 strip_size; + u32 first_group; + u32 last_group; + u32 current_group; + u32 map_row; + u32 aio_handle; + u64 disk_block; + u32 disk_block_cnt; + u8 cdb[16]; + u8 cdb_length; + int offload_to_mirror; + struct pqi_encryption_info *encryption_info_ptr; + struct pqi_encryption_info encryption_info; +#if BITS_PER_LONG == 32 + u64 tmpdiv; +#endif + + /* Check for valid opcode, get LBA and block count. */ + switch (scmd->cmnd[0]) { + case WRITE_6: + is_write = true; + fallthrough; + case READ_6: + first_block = (u64)(((scmd->cmnd[1] & 0x1f) << 16) | + (scmd->cmnd[2] << 8) | scmd->cmnd[3]); + block_cnt = (u32)scmd->cmnd[4]; + if (block_cnt == 0) + block_cnt = 256; + break; + case WRITE_10: + is_write = true; + fallthrough; + case READ_10: + first_block = (u64)get_unaligned_be32(&scmd->cmnd[2]); + block_cnt = (u32)get_unaligned_be16(&scmd->cmnd[7]); + break; + case WRITE_12: + is_write = true; + fallthrough; + case READ_12: + first_block = (u64)get_unaligned_be32(&scmd->cmnd[2]); + block_cnt = get_unaligned_be32(&scmd->cmnd[6]); + break; + case WRITE_16: + is_write = true; + fallthrough; + case READ_16: + first_block = get_unaligned_be64(&scmd->cmnd[2]); + block_cnt = get_unaligned_be32(&scmd->cmnd[10]); + break; + default: + /* Process via normal I/O path. */ + return PQI_RAID_BYPASS_INELIGIBLE; + } + + /* Check for write to non-RAID-0. */ + if (is_write && device->raid_level != SA_RAID_0) + return PQI_RAID_BYPASS_INELIGIBLE; + + if (unlikely(block_cnt == 0)) + return PQI_RAID_BYPASS_INELIGIBLE; + + last_block = first_block + block_cnt - 1; + raid_map = device->raid_map; + + /* Check for invalid block or wraparound. */ + if (last_block >= get_unaligned_le64(&raid_map->volume_blk_cnt) || + last_block < first_block) + return PQI_RAID_BYPASS_INELIGIBLE; + + data_disks_per_row = get_unaligned_le16(&raid_map->data_disks_per_row); + strip_size = get_unaligned_le16(&raid_map->strip_size); + layout_map_count = get_unaligned_le16(&raid_map->layout_map_count); + + /* Calculate stripe information for the request. */ + blocks_per_row = data_disks_per_row * strip_size; +#if BITS_PER_LONG == 32 + tmpdiv = first_block; + do_div(tmpdiv, blocks_per_row); + first_row = tmpdiv; + tmpdiv = last_block; + do_div(tmpdiv, blocks_per_row); + last_row = tmpdiv; + first_row_offset = (u32)(first_block - (first_row * blocks_per_row)); + last_row_offset = (u32)(last_block - (last_row * blocks_per_row)); + tmpdiv = first_row_offset; + do_div(tmpdiv, strip_size); + first_column = tmpdiv; + tmpdiv = last_row_offset; + do_div(tmpdiv, strip_size); + last_column = tmpdiv; +#else + first_row = first_block / blocks_per_row; + last_row = last_block / blocks_per_row; + first_row_offset = (u32)(first_block - (first_row * blocks_per_row)); + last_row_offset = (u32)(last_block - (last_row * blocks_per_row)); + first_column = first_row_offset / strip_size; + last_column = last_row_offset / strip_size; +#endif + + /* If this isn't a single row/column then give to the controller. */ + if (first_row != last_row || first_column != last_column) + return PQI_RAID_BYPASS_INELIGIBLE; + + /* Proceeding with driver mapping. */ + total_disks_per_row = data_disks_per_row + + get_unaligned_le16(&raid_map->metadata_disks_per_row); + map_row = ((u32)(first_row >> raid_map->parity_rotation_shift)) % + get_unaligned_le16(&raid_map->row_cnt); + map_index = (map_row * total_disks_per_row) + first_column; + + /* RAID 1 */ + if (device->raid_level == SA_RAID_1) { + if (device->offload_to_mirror) + map_index += data_disks_per_row; + device->offload_to_mirror = !device->offload_to_mirror; + } else if (device->raid_level == SA_RAID_ADM) { + /* RAID ADM */ + /* + * Handles N-way mirrors (R1-ADM) and R10 with # of drives + * divisible by 3. + */ + offload_to_mirror = device->offload_to_mirror; + if (offload_to_mirror == 0) { + /* use physical disk in the first mirrored group. */ + map_index %= data_disks_per_row; + } else { + do { + /* + * Determine mirror group that map_index + * indicates. + */ + current_group = map_index / data_disks_per_row; + + if (offload_to_mirror != current_group) { + if (current_group < + layout_map_count - 1) { + /* + * Select raid index from + * next group. + */ + map_index += data_disks_per_row; + current_group++; + } else { + /* + * Select raid index from first + * group. + */ + map_index %= data_disks_per_row; + current_group = 0; + } + } + } while (offload_to_mirror != current_group); + } + + /* Set mirror group to use next time. */ + offload_to_mirror = + (offload_to_mirror >= layout_map_count - 1) ? + 0 : offload_to_mirror + 1; + device->offload_to_mirror = offload_to_mirror; + /* + * Avoid direct use of device->offload_to_mirror within this + * function since multiple threads might simultaneously + * increment it beyond the range of device->layout_map_count -1. + */ + } else if ((device->raid_level == SA_RAID_5 || + device->raid_level == SA_RAID_6) && layout_map_count > 1) { + /* RAID 50/60 */ + /* Verify first and last block are in same RAID group */ + r5or6_blocks_per_row = strip_size * data_disks_per_row; + stripesize = r5or6_blocks_per_row * layout_map_count; +#if BITS_PER_LONG == 32 + tmpdiv = first_block; + first_group = do_div(tmpdiv, stripesize); + tmpdiv = first_group; + do_div(tmpdiv, r5or6_blocks_per_row); + first_group = tmpdiv; + tmpdiv = last_block; + last_group = do_div(tmpdiv, stripesize); + tmpdiv = last_group; + do_div(tmpdiv, r5or6_blocks_per_row); + last_group = tmpdiv; +#else + first_group = (first_block % stripesize) / r5or6_blocks_per_row; + last_group = (last_block % stripesize) / r5or6_blocks_per_row; +#endif + if (first_group != last_group) + return PQI_RAID_BYPASS_INELIGIBLE; + + /* Verify request is in a single row of RAID 5/6 */ +#if BITS_PER_LONG == 32 + tmpdiv = first_block; + do_div(tmpdiv, stripesize); + first_row = r5or6_first_row = r0_first_row = tmpdiv; + tmpdiv = last_block; + do_div(tmpdiv, stripesize); + r5or6_last_row = r0_last_row = tmpdiv; +#else + first_row = r5or6_first_row = r0_first_row = + first_block / stripesize; + r5or6_last_row = r0_last_row = last_block / stripesize; +#endif + if (r5or6_first_row != r5or6_last_row) + return PQI_RAID_BYPASS_INELIGIBLE; + + /* Verify request is in a single column */ +#if BITS_PER_LONG == 32 + tmpdiv = first_block; + first_row_offset = do_div(tmpdiv, stripesize); + tmpdiv = first_row_offset; + first_row_offset = (u32)do_div(tmpdiv, r5or6_blocks_per_row); + r5or6_first_row_offset = first_row_offset; + tmpdiv = last_block; + r5or6_last_row_offset = do_div(tmpdiv, stripesize); + tmpdiv = r5or6_last_row_offset; + r5or6_last_row_offset = do_div(tmpdiv, r5or6_blocks_per_row); + tmpdiv = r5or6_first_row_offset; + do_div(tmpdiv, strip_size); + first_column = r5or6_first_column = tmpdiv; + tmpdiv = r5or6_last_row_offset; + do_div(tmpdiv, strip_size); + r5or6_last_column = tmpdiv; +#else + first_row_offset = r5or6_first_row_offset = + (u32)((first_block % stripesize) % + r5or6_blocks_per_row); + + r5or6_last_row_offset = + (u32)((last_block % stripesize) % + r5or6_blocks_per_row); + + first_column = r5or6_first_row_offset / strip_size; + r5or6_first_column = first_column; + r5or6_last_column = r5or6_last_row_offset / strip_size; +#endif + if (r5or6_first_column != r5or6_last_column) + return PQI_RAID_BYPASS_INELIGIBLE; + + /* Request is eligible */ + map_row = + ((u32)(first_row >> raid_map->parity_rotation_shift)) % + get_unaligned_le16(&raid_map->row_cnt); + + map_index = (first_group * + (get_unaligned_le16(&raid_map->row_cnt) * + total_disks_per_row)) + + (map_row * total_disks_per_row) + first_column; + } + + aio_handle = raid_map->disk_data[map_index].aio_handle; + disk_block = get_unaligned_le64(&raid_map->disk_starting_blk) + + first_row * strip_size + + (first_row_offset - first_column * strip_size); + disk_block_cnt = block_cnt; + + /* Handle differing logical/physical block sizes. */ + if (raid_map->phys_blk_shift) { + disk_block <<= raid_map->phys_blk_shift; + disk_block_cnt <<= raid_map->phys_blk_shift; + } + + if (unlikely(disk_block_cnt > 0xffff)) + return PQI_RAID_BYPASS_INELIGIBLE; + + /* Build the new CDB for the physical disk I/O. */ + if (disk_block > 0xffffffff) { + cdb[0] = is_write ? WRITE_16 : READ_16; + cdb[1] = 0; + put_unaligned_be64(disk_block, &cdb[2]); + put_unaligned_be32(disk_block_cnt, &cdb[10]); + cdb[14] = 0; + cdb[15] = 0; + cdb_length = 16; + } else { + cdb[0] = is_write ? WRITE_10 : READ_10; + cdb[1] = 0; + put_unaligned_be32((u32)disk_block, &cdb[2]); + cdb[6] = 0; + put_unaligned_be16((u16)disk_block_cnt, &cdb[7]); + cdb[9] = 0; + cdb_length = 10; + } + + if (get_unaligned_le16(&raid_map->flags) & + RAID_MAP_ENCRYPTION_ENABLED) { + pqi_set_encryption_info(&encryption_info, raid_map, + first_block); + encryption_info_ptr = &encryption_info; + } else { + encryption_info_ptr = NULL; + } + + return pqi_aio_submit_io(ctrl_info, scmd, aio_handle, + cdb, cdb_length, queue_group, encryption_info_ptr, true); +} + +#define PQI_STATUS_IDLE 0x0 + +#define PQI_CREATE_ADMIN_QUEUE_PAIR 1 +#define PQI_DELETE_ADMIN_QUEUE_PAIR 2 + +#define PQI_DEVICE_STATE_POWER_ON_AND_RESET 0x0 +#define PQI_DEVICE_STATE_STATUS_AVAILABLE 0x1 +#define PQI_DEVICE_STATE_ALL_REGISTERS_READY 0x2 +#define PQI_DEVICE_STATE_ADMIN_QUEUE_PAIR_READY 0x3 +#define PQI_DEVICE_STATE_ERROR 0x4 + +#define PQI_MODE_READY_TIMEOUT_SECS 30 +#define PQI_MODE_READY_POLL_INTERVAL_MSECS 1 + +static int pqi_wait_for_pqi_mode_ready(struct pqi_ctrl_info *ctrl_info) +{ + struct pqi_device_registers __iomem *pqi_registers; + unsigned long timeout; + u64 signature; + u8 status; + + pqi_registers = ctrl_info->pqi_registers; + timeout = (PQI_MODE_READY_TIMEOUT_SECS * PQI_HZ) + jiffies; + + while (1) { + signature = readq(&pqi_registers->signature); + if (memcmp(&signature, PQI_DEVICE_SIGNATURE, + sizeof(signature)) == 0) + break; + if (time_after(jiffies, timeout)) { + dev_err(&ctrl_info->pci_dev->dev, + "timed out waiting for PQI signature\n"); + return -ETIMEDOUT; + } + msleep(PQI_MODE_READY_POLL_INTERVAL_MSECS); + } + + while (1) { + status = readb(&pqi_registers->function_and_status_code); + if (status == PQI_STATUS_IDLE) + break; + if (time_after(jiffies, timeout)) { + dev_err(&ctrl_info->pci_dev->dev, + "timed out waiting for PQI IDLE\n"); + return -ETIMEDOUT; + } + msleep(PQI_MODE_READY_POLL_INTERVAL_MSECS); + } + + while (1) { + if (readl(&pqi_registers->device_status) == + PQI_DEVICE_STATE_ALL_REGISTERS_READY) + break; + if (time_after(jiffies, timeout)) { + dev_err(&ctrl_info->pci_dev->dev, + "timed out waiting for PQI all registers ready\n"); + return -ETIMEDOUT; + } + msleep(PQI_MODE_READY_POLL_INTERVAL_MSECS); + } + + return 0; +} + +static inline void pqi_aio_path_disabled(struct pqi_io_request *io_request) +{ + struct pqi_scsi_dev *device; + + device = io_request->scmd->device->hostdata; + device->raid_bypass_enabled = false; + device->aio_enabled = false; +} + +static inline void pqi_take_device_offline(struct scsi_device *sdev, char *path) +{ + struct pqi_ctrl_info *ctrl_info; + struct pqi_scsi_dev *device; + + device = sdev->hostdata; + if (device->device_offline) + return; + + device->device_offline = true; + ctrl_info = shost_to_hba(sdev->host); + pqi_schedule_rescan_worker(ctrl_info); + dev_err(&ctrl_info->pci_dev->dev, "re-scanning %s scsi %d:%d:%d:%d\n", + path, ctrl_info->scsi_host->host_no, device->bus, + device->target, device->lun); +} + +static void pqi_process_raid_io_error(struct pqi_io_request *io_request) +{ + u8 scsi_status; + u8 host_byte; + struct scsi_cmnd *scmd; + struct pqi_raid_error_info *error_info; + size_t sense_data_length; + int residual_count; + int xfer_count; + struct scsi_sense_hdr sshdr; + + scmd = io_request->scmd; + if (!scmd) + return; + + error_info = io_request->error_info; + scsi_status = error_info->status; + host_byte = DID_OK; + + switch (error_info->data_out_result) { + case PQI_DATA_IN_OUT_GOOD: + break; + case PQI_DATA_IN_OUT_UNDERFLOW: + xfer_count = + get_unaligned_le32(&error_info->data_out_transferred); + residual_count = scsi_bufflen(scmd) - xfer_count; + scsi_set_resid(scmd, residual_count); + if (xfer_count < scmd->underflow) + host_byte = DID_SOFT_ERROR; + break; + case PQI_DATA_IN_OUT_UNSOLICITED_ABORT: + case PQI_DATA_IN_OUT_ABORTED: + host_byte = DID_ABORT; + break; + case PQI_DATA_IN_OUT_TIMEOUT: + host_byte = DID_TIME_OUT; + break; + case PQI_DATA_IN_OUT_BUFFER_OVERFLOW: + case PQI_DATA_IN_OUT_PROTOCOL_ERROR: + case PQI_DATA_IN_OUT_BUFFER_ERROR: + case PQI_DATA_IN_OUT_BUFFER_OVERFLOW_DESCRIPTOR_AREA: + case PQI_DATA_IN_OUT_BUFFER_OVERFLOW_BRIDGE: + case PQI_DATA_IN_OUT_ERROR: + case PQI_DATA_IN_OUT_HARDWARE_ERROR: + case PQI_DATA_IN_OUT_PCIE_FABRIC_ERROR: + case PQI_DATA_IN_OUT_PCIE_COMPLETION_TIMEOUT: + case PQI_DATA_IN_OUT_PCIE_COMPLETER_ABORT_RECEIVED: + case PQI_DATA_IN_OUT_PCIE_UNSUPPORTED_REQUEST_RECEIVED: + case PQI_DATA_IN_OUT_PCIE_ECRC_CHECK_FAILED: + case PQI_DATA_IN_OUT_PCIE_UNSUPPORTED_REQUEST: + case PQI_DATA_IN_OUT_PCIE_ACS_VIOLATION: + case PQI_DATA_IN_OUT_PCIE_TLP_PREFIX_BLOCKED: + case PQI_DATA_IN_OUT_PCIE_POISONED_MEMORY_READ: + default: + host_byte = DID_ERROR; + break; + } + + sense_data_length = get_unaligned_le16(&error_info->sense_data_length); + if (sense_data_length == 0) + sense_data_length = + get_unaligned_le16(&error_info->response_data_length); + if (sense_data_length) { + if (sense_data_length > sizeof(error_info->data)) + sense_data_length = sizeof(error_info->data); + + if (scsi_status == SAM_STAT_CHECK_CONDITION && + scsi_normalize_sense(error_info->data, + sense_data_length, &sshdr) && + sshdr.sense_key == HARDWARE_ERROR && + sshdr.asc == 0x3e) { + struct pqi_ctrl_info *ctrl_info = shost_to_hba(scmd->device->host); + struct pqi_scsi_dev *device = scmd->device->hostdata; + + switch (sshdr.ascq) { + case 0x1: /* LOGICAL UNIT FAILURE */ + if (printk_ratelimit()) + scmd_printk(KERN_ERR, scmd, "received 'logical unit failure' from controller for scsi %d:%d:%d:%d\n", + ctrl_info->scsi_host->host_no, device->bus, device->target, device->lun); + pqi_take_device_offline(scmd->device, "RAID"); + host_byte = DID_NO_CONNECT; + break; + + default: /* See http://www.t10.org/lists/asc-num.htm#ASC_3E */ + if (printk_ratelimit()) + scmd_printk(KERN_ERR, scmd, "received unhandled error %d from controller for scsi %d:%d:%d:%d\n", + sshdr.ascq, ctrl_info->scsi_host->host_no, device->bus, device->target, device->lun); + break; + } + } + + if (sense_data_length > SCSI_SENSE_BUFFERSIZE) + sense_data_length = SCSI_SENSE_BUFFERSIZE; + memcpy(scmd->sense_buffer, error_info->data, + sense_data_length); + } + + scmd->result = scsi_status; + set_host_byte(scmd, host_byte); +} + +static void pqi_process_aio_io_error(struct pqi_io_request *io_request) +{ + u8 scsi_status; + u8 host_byte; + struct scsi_cmnd *scmd; + struct pqi_aio_error_info *error_info; + size_t sense_data_length; + int residual_count; + int xfer_count; + bool device_offline; + + scmd = io_request->scmd; + error_info = io_request->error_info; + host_byte = DID_OK; + sense_data_length = 0; + device_offline = false; + + switch (error_info->service_response) { + case PQI_AIO_SERV_RESPONSE_COMPLETE: + scsi_status = error_info->status; + break; + case PQI_AIO_SERV_RESPONSE_FAILURE: + switch (error_info->status) { + case PQI_AIO_STATUS_IO_ABORTED: + scsi_status = SAM_STAT_TASK_ABORTED; + break; + case PQI_AIO_STATUS_UNDERRUN: + scsi_status = SAM_STAT_GOOD; + residual_count = get_unaligned_le32( + &error_info->residual_count); + scsi_set_resid(scmd, residual_count); + xfer_count = scsi_bufflen(scmd) - residual_count; + if (xfer_count < scmd->underflow) + host_byte = DID_SOFT_ERROR; + break; + case PQI_AIO_STATUS_OVERRUN: + scsi_status = SAM_STAT_GOOD; + break; + case PQI_AIO_STATUS_AIO_PATH_DISABLED: + pqi_aio_path_disabled(io_request); + scsi_status = SAM_STAT_GOOD; + io_request->status = -EAGAIN; + break; + case PQI_AIO_STATUS_NO_PATH_TO_DEVICE: + case PQI_AIO_STATUS_INVALID_DEVICE: + if (!io_request->raid_bypass) { + device_offline = true; + pqi_take_device_offline(scmd->device, "AIO"); + host_byte = DID_NO_CONNECT; + } + scsi_status = SAM_STAT_CHECK_CONDITION; + break; + case PQI_AIO_STATUS_IO_ERROR: + default: + scsi_status = SAM_STAT_CHECK_CONDITION; + break; + } + break; + case PQI_AIO_SERV_RESPONSE_TMF_COMPLETE: + case PQI_AIO_SERV_RESPONSE_TMF_SUCCEEDED: + scsi_status = SAM_STAT_GOOD; + break; + case PQI_AIO_SERV_RESPONSE_TMF_REJECTED: + case PQI_AIO_SERV_RESPONSE_TMF_INCORRECT_LUN: + default: + scsi_status = SAM_STAT_CHECK_CONDITION; + break; + } + + if (error_info->data_present) { + sense_data_length = + get_unaligned_le16(&error_info->data_length); + if (sense_data_length) { + if (sense_data_length > sizeof(error_info->data)) + sense_data_length = sizeof(error_info->data); + if (sense_data_length > SCSI_SENSE_BUFFERSIZE) + sense_data_length = SCSI_SENSE_BUFFERSIZE; + memcpy(scmd->sense_buffer, error_info->data, + sense_data_length); + } + } + + if (device_offline && sense_data_length == 0) + scsi_build_sense_buffer(0, scmd->sense_buffer, HARDWARE_ERROR, + 0x3e, 0x1); + + scmd->result = scsi_status; + set_host_byte(scmd, host_byte); +} + +static void pqi_process_io_error(unsigned int iu_type, + struct pqi_io_request *io_request) +{ + switch (iu_type) { + case PQI_RESPONSE_IU_RAID_PATH_IO_ERROR: + pqi_process_raid_io_error(io_request); + break; + case PQI_RESPONSE_IU_AIO_PATH_IO_ERROR: + pqi_process_aio_io_error(io_request); + break; + } +} + +static int pqi_interpret_task_management_response( + struct pqi_task_management_response *response) +{ + int rc; + + switch (response->response_code) { + case SOP_TMF_COMPLETE: + case SOP_TMF_FUNCTION_SUCCEEDED: + rc = 0; + break; + case SOP_TMF_REJECTED: + rc = -EAGAIN; + break; + default: + rc = -EIO; + break; + } + + return rc; +} + +static inline void pqi_invalid_response(struct pqi_ctrl_info *ctrl_info) +{ + pqi_take_ctrl_offline(ctrl_info); +} + +static int pqi_process_io_intr(struct pqi_ctrl_info *ctrl_info, struct pqi_queue_group *queue_group) +{ + int num_responses; + pqi_index_t oq_pi; + pqi_index_t oq_ci; + struct pqi_io_request *io_request; + struct pqi_io_response *response; + u16 request_id; + + num_responses = 0; + oq_ci = queue_group->oq_ci_copy; + + while (1) { + oq_pi = readl(queue_group->oq_pi); + if (oq_pi >= ctrl_info->num_elements_per_oq) { + pqi_invalid_response(ctrl_info); + dev_err(&ctrl_info->pci_dev->dev, + "I/O interrupt: producer index (%u) out of range (0-%u): consumer index: %u\n", + oq_pi, ctrl_info->num_elements_per_oq - 1, oq_ci); + return -1; + } + if (oq_pi == oq_ci) + break; + + num_responses++; + response = queue_group->oq_element_array + + (oq_ci * PQI_OPERATIONAL_OQ_ELEMENT_LENGTH); + + request_id = get_unaligned_le16(&response->request_id); + if (request_id >= ctrl_info->max_io_slots) { + pqi_invalid_response(ctrl_info); + dev_err(&ctrl_info->pci_dev->dev, + "request ID in response (%u) out of range (0-%u): producer index: %u consumer index: %u\n", + request_id, ctrl_info->max_io_slots - 1, oq_pi, oq_ci); + return -1; + } + + io_request = &ctrl_info->io_request_pool[request_id]; + if (atomic_read(&io_request->refcount) == 0) { + pqi_invalid_response(ctrl_info); + dev_err(&ctrl_info->pci_dev->dev, + "request ID in response (%u) does not match an outstanding I/O request: producer index: %u consumer index: %u\n", + request_id, oq_pi, oq_ci); + return -1; + } + + switch (response->header.iu_type) { + case PQI_RESPONSE_IU_RAID_PATH_IO_SUCCESS: + case PQI_RESPONSE_IU_AIO_PATH_IO_SUCCESS: + if (io_request->scmd) + io_request->scmd->result = 0; + fallthrough; + case PQI_RESPONSE_IU_GENERAL_MANAGEMENT: + break; + case PQI_RESPONSE_IU_VENDOR_GENERAL: + io_request->status = + get_unaligned_le16( + &((struct pqi_vendor_general_response *) + response)->status); + break; + case PQI_RESPONSE_IU_TASK_MANAGEMENT: + io_request->status = + pqi_interpret_task_management_response( + (void *)response); + break; + case PQI_RESPONSE_IU_AIO_PATH_DISABLED: + pqi_aio_path_disabled(io_request); + io_request->status = -EAGAIN; + break; + case PQI_RESPONSE_IU_RAID_PATH_IO_ERROR: + case PQI_RESPONSE_IU_AIO_PATH_IO_ERROR: + io_request->error_info = ctrl_info->error_buffer + + (get_unaligned_le16(&response->error_index) * + PQI_ERROR_BUFFER_ELEMENT_LENGTH); + pqi_process_io_error(response->header.iu_type, io_request); + break; + default: + pqi_invalid_response(ctrl_info); + dev_err(&ctrl_info->pci_dev->dev, + "unexpected IU type: 0x%x: producer index: %u consumer index: %u\n", + response->header.iu_type, oq_pi, oq_ci); + return -1; + } + + io_request->io_complete_callback(io_request, io_request->context); + + /* + * Note that the I/O request structure CANNOT BE TOUCHED after + * returning from the I/O completion callback! + */ + oq_ci = (oq_ci + 1) % ctrl_info->num_elements_per_oq; + } + + if (num_responses) { + queue_group->oq_ci_copy = oq_ci; + writel(oq_ci, queue_group->oq_ci); + } + + return num_responses; +} + +static inline unsigned int pqi_num_elements_free(unsigned int pi, + unsigned int ci, unsigned int elements_in_queue) +{ + unsigned int num_elements_used; + + if (pi >= ci) + num_elements_used = pi - ci; + else + num_elements_used = elements_in_queue - ci + pi; + + return elements_in_queue - num_elements_used - 1; +} + +static void pqi_send_event_ack(struct pqi_ctrl_info *ctrl_info, + struct pqi_event_acknowledge_request *iu, size_t iu_length) +{ + pqi_index_t iq_pi; + pqi_index_t iq_ci; + unsigned long flags; + void *next_element; + struct pqi_queue_group *queue_group; + + queue_group = &ctrl_info->queue_groups[PQI_DEFAULT_QUEUE_GROUP]; + put_unaligned_le16(queue_group->oq_id, &iu->header.response_queue_id); + + while (1) { + spin_lock_irqsave(&queue_group->submit_lock[RAID_PATH], flags); + + iq_pi = queue_group->iq_pi_copy[RAID_PATH]; + iq_ci = readl(queue_group->iq_ci[RAID_PATH]); + + if (pqi_num_elements_free(iq_pi, iq_ci, + ctrl_info->num_elements_per_iq)) + break; + + spin_unlock_irqrestore( + &queue_group->submit_lock[RAID_PATH], flags); + + if (pqi_ctrl_offline(ctrl_info)) + return; + } + + next_element = queue_group->iq_element_array[RAID_PATH] + + (iq_pi * PQI_OPERATIONAL_IQ_ELEMENT_LENGTH); + + memcpy(next_element, iu, iu_length); + + iq_pi = (iq_pi + 1) % ctrl_info->num_elements_per_iq; + queue_group->iq_pi_copy[RAID_PATH] = iq_pi; + + /* + * This write notifies the controller that an IU is available to be + * processed. + */ + writel(iq_pi, queue_group->iq_pi[RAID_PATH]); + + spin_unlock_irqrestore(&queue_group->submit_lock[RAID_PATH], flags); +} + +static void pqi_acknowledge_event(struct pqi_ctrl_info *ctrl_info, + struct pqi_event *event) +{ + struct pqi_event_acknowledge_request request; + + memset(&request, 0, sizeof(request)); + + request.header.iu_type = PQI_REQUEST_IU_ACKNOWLEDGE_VENDOR_EVENT; + put_unaligned_le16(sizeof(request) - PQI_REQUEST_HEADER_LENGTH, + &request.header.iu_length); + request.event_type = event->event_type; + request.event_id = event->event_id; + request.additional_event_id = event->additional_event_id; + + pqi_send_event_ack(ctrl_info, &request, sizeof(request)); +} + +#define PQI_SOFT_RESET_STATUS_TIMEOUT_SECS 30 +#define PQI_SOFT_RESET_STATUS_POLL_INTERVAL_SECS 1 + +static enum pqi_soft_reset_status pqi_poll_for_soft_reset_status( + struct pqi_ctrl_info *ctrl_info) +{ + unsigned long timeout; + u8 status; + + timeout = (PQI_SOFT_RESET_STATUS_TIMEOUT_SECS * PQI_HZ) + jiffies; + + while (1) { + status = pqi_read_soft_reset_status(ctrl_info); + if (status & PQI_SOFT_RESET_INITIATE) + return RESET_INITIATE_DRIVER; + + if (status & PQI_SOFT_RESET_ABORT) + return RESET_ABORT; + + if (time_after(jiffies, timeout)) { + dev_err(&ctrl_info->pci_dev->dev, + "timed out waiting for soft reset status\n"); + return RESET_TIMEDOUT; + } + + if (!sis_is_firmware_running(ctrl_info)) + return RESET_NORESPONSE; + + ssleep(PQI_SOFT_RESET_STATUS_POLL_INTERVAL_SECS); + } +} + +static void pqi_process_soft_reset(struct pqi_ctrl_info *ctrl_info, + enum pqi_soft_reset_status reset_status) +{ + int rc; + + switch (reset_status) { + case RESET_INITIATE_DRIVER: + case RESET_TIMEDOUT: + dev_info(&ctrl_info->pci_dev->dev, + "resetting controller %u\n", ctrl_info->ctrl_id); + sis_soft_reset(ctrl_info); + fallthrough; + case RESET_INITIATE_FIRMWARE: + rc = pqi_ofa_ctrl_restart(ctrl_info); + pqi_ofa_free_host_buffer(ctrl_info); + dev_info(&ctrl_info->pci_dev->dev, + "Online Firmware Activation for controller %u: %s\n", + ctrl_info->ctrl_id, rc == 0 ? "SUCCESS" : "FAILED"); + break; + case RESET_ABORT: + pqi_ofa_ctrl_unquiesce(ctrl_info); + dev_info(&ctrl_info->pci_dev->dev, + "Online Firmware Activation for controller %u: %s\n", + ctrl_info->ctrl_id, "ABORTED"); + break; + case RESET_NORESPONSE: + pqi_ofa_free_host_buffer(ctrl_info); + pqi_take_ctrl_offline(ctrl_info); + break; + } +} + +static void pqi_ofa_process_event(struct pqi_ctrl_info *ctrl_info, + struct pqi_event *event) +{ + u16 event_id; + enum pqi_soft_reset_status status; + + event_id = get_unaligned_le16(&event->event_id); + + mutex_lock(&ctrl_info->ofa_mutex); + + if (event_id == PQI_EVENT_OFA_QUIESCE) { + dev_info(&ctrl_info->pci_dev->dev, + "Received Online Firmware Activation quiesce event for controller %u\n", + ctrl_info->ctrl_id); + pqi_ofa_ctrl_quiesce(ctrl_info); + pqi_acknowledge_event(ctrl_info, event); + if (ctrl_info->soft_reset_handshake_supported) { + status = pqi_poll_for_soft_reset_status(ctrl_info); + pqi_process_soft_reset(ctrl_info, status); + } else { + pqi_process_soft_reset(ctrl_info, + RESET_INITIATE_FIRMWARE); + } + + } else if (event_id == PQI_EVENT_OFA_MEMORY_ALLOCATION) { + pqi_acknowledge_event(ctrl_info, event); + pqi_ofa_setup_host_buffer(ctrl_info, + le32_to_cpu(event->ofa_bytes_requested)); + pqi_ofa_host_memory_update(ctrl_info); + } else if (event_id == PQI_EVENT_OFA_CANCELLED) { + pqi_ofa_free_host_buffer(ctrl_info); + pqi_acknowledge_event(ctrl_info, event); + dev_info(&ctrl_info->pci_dev->dev, + "Online Firmware Activation(%u) cancel reason : %u\n", + ctrl_info->ctrl_id, event->ofa_cancel_reason); + } + + mutex_unlock(&ctrl_info->ofa_mutex); +} + +static void pqi_event_worker(struct work_struct *work) +{ + unsigned int i; + struct pqi_ctrl_info *ctrl_info; + struct pqi_event *event; + + ctrl_info = container_of(work, struct pqi_ctrl_info, event_work); + + pqi_ctrl_busy(ctrl_info); + pqi_wait_if_ctrl_blocked(ctrl_info, NO_TIMEOUT); + if (pqi_ctrl_offline(ctrl_info)) + goto out; + + pqi_schedule_rescan_worker_delayed(ctrl_info); + + event = ctrl_info->events; + for (i = 0; i < PQI_NUM_SUPPORTED_EVENTS; i++) { + if (event->pending) { + event->pending = false; + if (event->event_type == PQI_EVENT_TYPE_OFA) { + pqi_ctrl_unbusy(ctrl_info); + pqi_ofa_process_event(ctrl_info, event); + return; + } + pqi_acknowledge_event(ctrl_info, event); + } + event++; + } + +out: + pqi_ctrl_unbusy(ctrl_info); +} + +#define PQI_HEARTBEAT_TIMER_INTERVAL (10 * PQI_HZ) + +static void pqi_heartbeat_timer_handler(struct timer_list *t) +{ + int num_interrupts; + u32 heartbeat_count; + struct pqi_ctrl_info *ctrl_info = from_timer(ctrl_info, t, + heartbeat_timer); + + pqi_check_ctrl_health(ctrl_info); + if (pqi_ctrl_offline(ctrl_info)) + return; + + num_interrupts = atomic_read(&ctrl_info->num_interrupts); + heartbeat_count = pqi_read_heartbeat_counter(ctrl_info); + + if (num_interrupts == ctrl_info->previous_num_interrupts) { + if (heartbeat_count == ctrl_info->previous_heartbeat_count) { + dev_err(&ctrl_info->pci_dev->dev, + "no heartbeat detected - last heartbeat count: %u\n", + heartbeat_count); + pqi_take_ctrl_offline(ctrl_info); + return; + } + } else { + ctrl_info->previous_num_interrupts = num_interrupts; + } + + ctrl_info->previous_heartbeat_count = heartbeat_count; + mod_timer(&ctrl_info->heartbeat_timer, + jiffies + PQI_HEARTBEAT_TIMER_INTERVAL); +} + +static void pqi_start_heartbeat_timer(struct pqi_ctrl_info *ctrl_info) +{ + if (!ctrl_info->heartbeat_counter) + return; + + ctrl_info->previous_num_interrupts = + atomic_read(&ctrl_info->num_interrupts); + ctrl_info->previous_heartbeat_count = + pqi_read_heartbeat_counter(ctrl_info); + + ctrl_info->heartbeat_timer.expires = + jiffies + PQI_HEARTBEAT_TIMER_INTERVAL; + add_timer(&ctrl_info->heartbeat_timer); +} + +static inline void pqi_stop_heartbeat_timer(struct pqi_ctrl_info *ctrl_info) +{ + del_timer_sync(&ctrl_info->heartbeat_timer); +} + +static inline int pqi_event_type_to_event_index(unsigned int event_type) +{ + int index; + + for (index = 0; index < ARRAY_SIZE(pqi_supported_event_types); index++) + if (event_type == pqi_supported_event_types[index]) + return index; + + return -1; +} + +static inline bool pqi_is_supported_event(unsigned int event_type) +{ + return pqi_event_type_to_event_index(event_type) != -1; +} + +static void pqi_ofa_capture_event_payload(struct pqi_event *event, + struct pqi_event_response *response) +{ + u16 event_id; + + event_id = get_unaligned_le16(&event->event_id); + + if (event->event_type == PQI_EVENT_TYPE_OFA) { + if (event_id == PQI_EVENT_OFA_MEMORY_ALLOCATION) { + event->ofa_bytes_requested = + response->data.ofa_memory_allocation.bytes_requested; + } else if (event_id == PQI_EVENT_OFA_CANCELLED) { + event->ofa_cancel_reason = + response->data.ofa_cancelled.reason; + } + } +} + +static int pqi_process_event_intr(struct pqi_ctrl_info *ctrl_info) +{ + int num_events; + pqi_index_t oq_pi; + pqi_index_t oq_ci; + struct pqi_event_queue *event_queue; + struct pqi_event_response *response; + struct pqi_event *event; + int event_index; + + event_queue = &ctrl_info->event_queue; + num_events = 0; + oq_ci = event_queue->oq_ci_copy; + + while (1) { + oq_pi = readl(event_queue->oq_pi); + if (oq_pi >= PQI_NUM_EVENT_QUEUE_ELEMENTS) { + pqi_invalid_response(ctrl_info); + dev_err(&ctrl_info->pci_dev->dev, + "event interrupt: producer index (%u) out of range (0-%u): consumer index: %u\n", + oq_pi, PQI_NUM_EVENT_QUEUE_ELEMENTS - 1, oq_ci); + return -1; + } + + if (oq_pi == oq_ci) + break; + + num_events++; + response = event_queue->oq_element_array + (oq_ci * PQI_EVENT_OQ_ELEMENT_LENGTH); + + event_index = + pqi_event_type_to_event_index(response->event_type); + + if (event_index >= 0 && response->request_acknowledge) { + event = &ctrl_info->events[event_index]; + event->pending = true; + event->event_type = response->event_type; + event->event_id = response->event_id; + event->additional_event_id = response->additional_event_id; + if (event->event_type == PQI_EVENT_TYPE_OFA) + pqi_ofa_capture_event_payload(event, response); + } + + oq_ci = (oq_ci + 1) % PQI_NUM_EVENT_QUEUE_ELEMENTS; + } + + if (num_events) { + event_queue->oq_ci_copy = oq_ci; + writel(oq_ci, event_queue->oq_ci); + schedule_work(&ctrl_info->event_work); + } + + return num_events; +} + +#define PQI_LEGACY_INTX_MASK 0x1 + +static inline void pqi_configure_legacy_intx(struct pqi_ctrl_info *ctrl_info, + bool enable_intx) +{ + u32 intx_mask; + struct pqi_device_registers __iomem *pqi_registers; + volatile void __iomem *register_addr; + + pqi_registers = ctrl_info->pqi_registers; + + if (enable_intx) + register_addr = &pqi_registers->legacy_intx_mask_clear; + else + register_addr = &pqi_registers->legacy_intx_mask_set; + + intx_mask = readl(register_addr); + intx_mask |= PQI_LEGACY_INTX_MASK; + writel(intx_mask, register_addr); +} + +static void pqi_change_irq_mode(struct pqi_ctrl_info *ctrl_info, + enum pqi_irq_mode new_mode) +{ + switch (ctrl_info->irq_mode) { + case IRQ_MODE_MSIX: + switch (new_mode) { + case IRQ_MODE_MSIX: + break; + case IRQ_MODE_INTX: + pqi_configure_legacy_intx(ctrl_info, true); + sis_enable_intx(ctrl_info); + break; + case IRQ_MODE_NONE: + break; + } + break; + case IRQ_MODE_INTX: + switch (new_mode) { + case IRQ_MODE_MSIX: + pqi_configure_legacy_intx(ctrl_info, false); + sis_enable_msix(ctrl_info); + break; + case IRQ_MODE_INTX: + break; + case IRQ_MODE_NONE: + pqi_configure_legacy_intx(ctrl_info, false); + break; + } + break; + case IRQ_MODE_NONE: + switch (new_mode) { + case IRQ_MODE_MSIX: + sis_enable_msix(ctrl_info); + break; + case IRQ_MODE_INTX: + pqi_configure_legacy_intx(ctrl_info, true); + sis_enable_intx(ctrl_info); + break; + case IRQ_MODE_NONE: + break; + } + break; + } + + ctrl_info->irq_mode = new_mode; +} + +#define PQI_LEGACY_INTX_PENDING 0x1 + +static inline bool pqi_is_valid_irq(struct pqi_ctrl_info *ctrl_info) +{ + bool valid_irq; + u32 intx_status; + + switch (ctrl_info->irq_mode) { + case IRQ_MODE_MSIX: + valid_irq = true; + break; + case IRQ_MODE_INTX: + intx_status = + readl(&ctrl_info->pqi_registers->legacy_intx_status); + if (intx_status & PQI_LEGACY_INTX_PENDING) + valid_irq = true; + else + valid_irq = false; + break; + case IRQ_MODE_NONE: + default: + valid_irq = false; + break; + } + + return valid_irq; +} + +static irqreturn_t pqi_irq_handler(int irq, void *data) +{ + struct pqi_ctrl_info *ctrl_info; + struct pqi_queue_group *queue_group; + int num_io_responses_handled; + int num_events_handled; + + queue_group = data; + ctrl_info = queue_group->ctrl_info; + + if (!pqi_is_valid_irq(ctrl_info)) + return IRQ_NONE; + + num_io_responses_handled = pqi_process_io_intr(ctrl_info, queue_group); + if (num_io_responses_handled < 0) + goto out; + + if (irq == ctrl_info->event_irq) { + num_events_handled = pqi_process_event_intr(ctrl_info); + if (num_events_handled < 0) + goto out; + } else { + num_events_handled = 0; + } + + if (num_io_responses_handled + num_events_handled > 0) + atomic_inc(&ctrl_info->num_interrupts); + + pqi_start_io(ctrl_info, queue_group, RAID_PATH, NULL); + pqi_start_io(ctrl_info, queue_group, AIO_PATH, NULL); + +out: + return IRQ_HANDLED; +} + +static int pqi_request_irqs(struct pqi_ctrl_info *ctrl_info) +{ + struct pci_dev *pci_dev = ctrl_info->pci_dev; + int i; + int rc; + + ctrl_info->event_irq = pci_irq_vector(pci_dev, 0); + + for (i = 0; i < ctrl_info->num_msix_vectors_enabled; i++) { + rc = request_irq(pci_irq_vector(pci_dev, i), pqi_irq_handler, 0, + DRIVER_NAME_SHORT, &ctrl_info->queue_groups[i]); + if (rc) { + dev_err(&pci_dev->dev, + "irq %u init failed with error %d\n", + pci_irq_vector(pci_dev, i), rc); + return rc; + } + ctrl_info->num_msix_vectors_initialized++; + } + + return 0; +} + +static void pqi_free_irqs(struct pqi_ctrl_info *ctrl_info) +{ + int i; + + for (i = 0; i < ctrl_info->num_msix_vectors_initialized; i++) + free_irq(pci_irq_vector(ctrl_info->pci_dev, i), + &ctrl_info->queue_groups[i]); + + ctrl_info->num_msix_vectors_initialized = 0; +} + +static int pqi_enable_msix_interrupts(struct pqi_ctrl_info *ctrl_info) +{ + int num_vectors_enabled; + + num_vectors_enabled = pci_alloc_irq_vectors(ctrl_info->pci_dev, + PQI_MIN_MSIX_VECTORS, ctrl_info->num_queue_groups, + PCI_IRQ_MSIX | PCI_IRQ_AFFINITY); + if (num_vectors_enabled < 0) { + dev_err(&ctrl_info->pci_dev->dev, + "MSI-X init failed with error %d\n", + num_vectors_enabled); + return num_vectors_enabled; + } + + ctrl_info->num_msix_vectors_enabled = num_vectors_enabled; + ctrl_info->irq_mode = IRQ_MODE_MSIX; + return 0; +} + +static void pqi_disable_msix_interrupts(struct pqi_ctrl_info *ctrl_info) +{ + if (ctrl_info->num_msix_vectors_enabled) { + pci_free_irq_vectors(ctrl_info->pci_dev); + ctrl_info->num_msix_vectors_enabled = 0; + } +} + +static int pqi_alloc_operational_queues(struct pqi_ctrl_info *ctrl_info) +{ + unsigned int i; + size_t alloc_length; + size_t element_array_length_per_iq; + size_t element_array_length_per_oq; + void *element_array; + void __iomem *next_queue_index; + void *aligned_pointer; + unsigned int num_inbound_queues; + unsigned int num_outbound_queues; + unsigned int num_queue_indexes; + struct pqi_queue_group *queue_group; + + element_array_length_per_iq = + PQI_OPERATIONAL_IQ_ELEMENT_LENGTH * + ctrl_info->num_elements_per_iq; + element_array_length_per_oq = + PQI_OPERATIONAL_OQ_ELEMENT_LENGTH * + ctrl_info->num_elements_per_oq; + num_inbound_queues = ctrl_info->num_queue_groups * 2; + num_outbound_queues = ctrl_info->num_queue_groups; + num_queue_indexes = (ctrl_info->num_queue_groups * 3) + 1; + + aligned_pointer = NULL; + + for (i = 0; i < num_inbound_queues; i++) { + aligned_pointer = PTR_ALIGN(aligned_pointer, + PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT); + aligned_pointer += element_array_length_per_iq; + } + + for (i = 0; i < num_outbound_queues; i++) { + aligned_pointer = PTR_ALIGN(aligned_pointer, + PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT); + aligned_pointer += element_array_length_per_oq; + } + + aligned_pointer = PTR_ALIGN(aligned_pointer, + PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT); + aligned_pointer += PQI_NUM_EVENT_QUEUE_ELEMENTS * + PQI_EVENT_OQ_ELEMENT_LENGTH; + + for (i = 0; i < num_queue_indexes; i++) { + aligned_pointer = PTR_ALIGN(aligned_pointer, + PQI_OPERATIONAL_INDEX_ALIGNMENT); + aligned_pointer += sizeof(pqi_index_t); + } + + alloc_length = (size_t)aligned_pointer + + PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT; + + alloc_length += PQI_EXTRA_SGL_MEMORY; + + ctrl_info->queue_memory_base = + dma_alloc_coherent(&ctrl_info->pci_dev->dev, alloc_length, + &ctrl_info->queue_memory_base_dma_handle, + GFP_KERNEL); + + if (!ctrl_info->queue_memory_base) + return -ENOMEM; + + ctrl_info->queue_memory_length = alloc_length; + + element_array = PTR_ALIGN(ctrl_info->queue_memory_base, + PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT); + + for (i = 0; i < ctrl_info->num_queue_groups; i++) { + queue_group = &ctrl_info->queue_groups[i]; + queue_group->iq_element_array[RAID_PATH] = element_array; + queue_group->iq_element_array_bus_addr[RAID_PATH] = + ctrl_info->queue_memory_base_dma_handle + + (element_array - ctrl_info->queue_memory_base); + element_array += element_array_length_per_iq; + element_array = PTR_ALIGN(element_array, + PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT); + queue_group->iq_element_array[AIO_PATH] = element_array; + queue_group->iq_element_array_bus_addr[AIO_PATH] = + ctrl_info->queue_memory_base_dma_handle + + (element_array - ctrl_info->queue_memory_base); + element_array += element_array_length_per_iq; + element_array = PTR_ALIGN(element_array, + PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT); + } + + for (i = 0; i < ctrl_info->num_queue_groups; i++) { + queue_group = &ctrl_info->queue_groups[i]; + queue_group->oq_element_array = element_array; + queue_group->oq_element_array_bus_addr = + ctrl_info->queue_memory_base_dma_handle + + (element_array - ctrl_info->queue_memory_base); + element_array += element_array_length_per_oq; + element_array = PTR_ALIGN(element_array, + PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT); + } + + ctrl_info->event_queue.oq_element_array = element_array; + ctrl_info->event_queue.oq_element_array_bus_addr = + ctrl_info->queue_memory_base_dma_handle + + (element_array - ctrl_info->queue_memory_base); + element_array += PQI_NUM_EVENT_QUEUE_ELEMENTS * + PQI_EVENT_OQ_ELEMENT_LENGTH; + + next_queue_index = (void __iomem *)PTR_ALIGN(element_array, + PQI_OPERATIONAL_INDEX_ALIGNMENT); + + for (i = 0; i < ctrl_info->num_queue_groups; i++) { + queue_group = &ctrl_info->queue_groups[i]; + queue_group->iq_ci[RAID_PATH] = next_queue_index; + queue_group->iq_ci_bus_addr[RAID_PATH] = + ctrl_info->queue_memory_base_dma_handle + + (next_queue_index - + (void __iomem *)ctrl_info->queue_memory_base); + next_queue_index += sizeof(pqi_index_t); + next_queue_index = PTR_ALIGN(next_queue_index, + PQI_OPERATIONAL_INDEX_ALIGNMENT); + queue_group->iq_ci[AIO_PATH] = next_queue_index; + queue_group->iq_ci_bus_addr[AIO_PATH] = + ctrl_info->queue_memory_base_dma_handle + + (next_queue_index - + (void __iomem *)ctrl_info->queue_memory_base); + next_queue_index += sizeof(pqi_index_t); + next_queue_index = PTR_ALIGN(next_queue_index, + PQI_OPERATIONAL_INDEX_ALIGNMENT); + queue_group->oq_pi = next_queue_index; + queue_group->oq_pi_bus_addr = + ctrl_info->queue_memory_base_dma_handle + + (next_queue_index - + (void __iomem *)ctrl_info->queue_memory_base); + next_queue_index += sizeof(pqi_index_t); + next_queue_index = PTR_ALIGN(next_queue_index, + PQI_OPERATIONAL_INDEX_ALIGNMENT); + } + + ctrl_info->event_queue.oq_pi = next_queue_index; + ctrl_info->event_queue.oq_pi_bus_addr = + ctrl_info->queue_memory_base_dma_handle + + (next_queue_index - + (void __iomem *)ctrl_info->queue_memory_base); + + return 0; +} + +static void pqi_init_operational_queues(struct pqi_ctrl_info *ctrl_info) +{ + unsigned int i; + u16 next_iq_id = PQI_MIN_OPERATIONAL_QUEUE_ID; + u16 next_oq_id = PQI_MIN_OPERATIONAL_QUEUE_ID; + + /* + * Initialize the backpointers to the controller structure in + * each operational queue group structure. + */ + for (i = 0; i < ctrl_info->num_queue_groups; i++) + ctrl_info->queue_groups[i].ctrl_info = ctrl_info; + + /* + * Assign IDs to all operational queues. Note that the IDs + * assigned to operational IQs are independent of the IDs + * assigned to operational OQs. + */ + ctrl_info->event_queue.oq_id = next_oq_id++; + for (i = 0; i < ctrl_info->num_queue_groups; i++) { + ctrl_info->queue_groups[i].iq_id[RAID_PATH] = next_iq_id++; + ctrl_info->queue_groups[i].iq_id[AIO_PATH] = next_iq_id++; + ctrl_info->queue_groups[i].oq_id = next_oq_id++; + } + + /* + * Assign MSI-X table entry indexes to all queues. Note that the + * interrupt for the event queue is shared with the first queue group. + */ + ctrl_info->event_queue.int_msg_num = 0; + for (i = 0; i < ctrl_info->num_queue_groups; i++) + ctrl_info->queue_groups[i].int_msg_num = i; + + for (i = 0; i < ctrl_info->num_queue_groups; i++) { + spin_lock_init(&ctrl_info->queue_groups[i].submit_lock[0]); + spin_lock_init(&ctrl_info->queue_groups[i].submit_lock[1]); + INIT_LIST_HEAD(&ctrl_info->queue_groups[i].request_list[0]); + INIT_LIST_HEAD(&ctrl_info->queue_groups[i].request_list[1]); + } +} + +static int pqi_alloc_admin_queues(struct pqi_ctrl_info *ctrl_info) +{ + size_t alloc_length; + struct pqi_admin_queues_aligned *admin_queues_aligned; + struct pqi_admin_queues *admin_queues; + + alloc_length = sizeof(struct pqi_admin_queues_aligned) + + PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT; + + ctrl_info->admin_queue_memory_base = + dma_alloc_coherent(&ctrl_info->pci_dev->dev, alloc_length, + &ctrl_info->admin_queue_memory_base_dma_handle, + GFP_KERNEL); + + if (!ctrl_info->admin_queue_memory_base) + return -ENOMEM; + + ctrl_info->admin_queue_memory_length = alloc_length; + + admin_queues = &ctrl_info->admin_queues; + admin_queues_aligned = PTR_ALIGN(ctrl_info->admin_queue_memory_base, + PQI_QUEUE_ELEMENT_ARRAY_ALIGNMENT); + admin_queues->iq_element_array = + &admin_queues_aligned->iq_element_array; + admin_queues->oq_element_array = + &admin_queues_aligned->oq_element_array; + admin_queues->iq_ci = &admin_queues_aligned->iq_ci; + admin_queues->oq_pi = + (pqi_index_t __iomem *)&admin_queues_aligned->oq_pi; + + admin_queues->iq_element_array_bus_addr = + ctrl_info->admin_queue_memory_base_dma_handle + + (admin_queues->iq_element_array - + ctrl_info->admin_queue_memory_base); + admin_queues->oq_element_array_bus_addr = + ctrl_info->admin_queue_memory_base_dma_handle + + (admin_queues->oq_element_array - + ctrl_info->admin_queue_memory_base); + admin_queues->iq_ci_bus_addr = + ctrl_info->admin_queue_memory_base_dma_handle + + ((void *)admin_queues->iq_ci - + ctrl_info->admin_queue_memory_base); + admin_queues->oq_pi_bus_addr = + ctrl_info->admin_queue_memory_base_dma_handle + + ((void __iomem *)admin_queues->oq_pi - + (void __iomem *)ctrl_info->admin_queue_memory_base); + + return 0; +} + +#define PQI_ADMIN_QUEUE_CREATE_TIMEOUT_JIFFIES PQI_HZ +#define PQI_ADMIN_QUEUE_CREATE_POLL_INTERVAL_MSECS 1 + +static int pqi_create_admin_queues(struct pqi_ctrl_info *ctrl_info) +{ + struct pqi_device_registers __iomem *pqi_registers; + struct pqi_admin_queues *admin_queues; + unsigned long timeout; + u8 status; + u32 reg; + + pqi_registers = ctrl_info->pqi_registers; + admin_queues = &ctrl_info->admin_queues; + + writeq((u64)admin_queues->iq_element_array_bus_addr, + &pqi_registers->admin_iq_element_array_addr); + writeq((u64)admin_queues->oq_element_array_bus_addr, + &pqi_registers->admin_oq_element_array_addr); + writeq((u64)admin_queues->iq_ci_bus_addr, + &pqi_registers->admin_iq_ci_addr); + writeq((u64)admin_queues->oq_pi_bus_addr, + &pqi_registers->admin_oq_pi_addr); + + reg = PQI_ADMIN_IQ_NUM_ELEMENTS | + (PQI_ADMIN_OQ_NUM_ELEMENTS << 8) | + (admin_queues->int_msg_num << 16); + writel(reg, &pqi_registers->admin_iq_num_elements); + writel(PQI_CREATE_ADMIN_QUEUE_PAIR, + &pqi_registers->function_and_status_code); + + timeout = PQI_ADMIN_QUEUE_CREATE_TIMEOUT_JIFFIES + jiffies; + while (1) { + status = readb(&pqi_registers->function_and_status_code); + if (status == PQI_STATUS_IDLE) + break; + if (time_after(jiffies, timeout)) + return -ETIMEDOUT; + msleep(PQI_ADMIN_QUEUE_CREATE_POLL_INTERVAL_MSECS); + } + + /* + * The offset registers are not initialized to the correct + * offsets until *after* the create admin queue pair command + * completes successfully. + */ + admin_queues->iq_pi = ctrl_info->iomem_base + + PQI_DEVICE_REGISTERS_OFFSET + + readq(&pqi_registers->admin_iq_pi_offset); + admin_queues->oq_ci = ctrl_info->iomem_base + + PQI_DEVICE_REGISTERS_OFFSET + + readq(&pqi_registers->admin_oq_ci_offset); + + return 0; +} + +static void pqi_submit_admin_request(struct pqi_ctrl_info *ctrl_info, + struct pqi_general_admin_request *request) +{ + struct pqi_admin_queues *admin_queues; + void *next_element; + pqi_index_t iq_pi; + + admin_queues = &ctrl_info->admin_queues; + iq_pi = admin_queues->iq_pi_copy; + + next_element = admin_queues->iq_element_array + + (iq_pi * PQI_ADMIN_IQ_ELEMENT_LENGTH); + + memcpy(next_element, request, sizeof(*request)); + + iq_pi = (iq_pi + 1) % PQI_ADMIN_IQ_NUM_ELEMENTS; + admin_queues->iq_pi_copy = iq_pi; + + /* + * This write notifies the controller that an IU is available to be + * processed. + */ + writel(iq_pi, admin_queues->iq_pi); +} + +#define PQI_ADMIN_REQUEST_TIMEOUT_SECS 60 + +static int pqi_poll_for_admin_response(struct pqi_ctrl_info *ctrl_info, + struct pqi_general_admin_response *response) +{ + struct pqi_admin_queues *admin_queues; + pqi_index_t oq_pi; + pqi_index_t oq_ci; + unsigned long timeout; + + admin_queues = &ctrl_info->admin_queues; + oq_ci = admin_queues->oq_ci_copy; + + timeout = (PQI_ADMIN_REQUEST_TIMEOUT_SECS * PQI_HZ) + jiffies; + + while (1) { + oq_pi = readl(admin_queues->oq_pi); + if (oq_pi != oq_ci) + break; + if (time_after(jiffies, timeout)) { + dev_err(&ctrl_info->pci_dev->dev, + "timed out waiting for admin response\n"); + return -ETIMEDOUT; + } + if (!sis_is_firmware_running(ctrl_info)) + return -ENXIO; + usleep_range(1000, 2000); + } + + memcpy(response, admin_queues->oq_element_array + + (oq_ci * PQI_ADMIN_OQ_ELEMENT_LENGTH), sizeof(*response)); + + oq_ci = (oq_ci + 1) % PQI_ADMIN_OQ_NUM_ELEMENTS; + admin_queues->oq_ci_copy = oq_ci; + writel(oq_ci, admin_queues->oq_ci); + + return 0; +} + +static void pqi_start_io(struct pqi_ctrl_info *ctrl_info, + struct pqi_queue_group *queue_group, enum pqi_io_path path, + struct pqi_io_request *io_request) +{ + struct pqi_io_request *next; + void *next_element; + pqi_index_t iq_pi; + pqi_index_t iq_ci; + size_t iu_length; + unsigned long flags; + unsigned int num_elements_needed; + unsigned int num_elements_to_end_of_queue; + size_t copy_count; + struct pqi_iu_header *request; + + spin_lock_irqsave(&queue_group->submit_lock[path], flags); + + if (io_request) { + io_request->queue_group = queue_group; + list_add_tail(&io_request->request_list_entry, + &queue_group->request_list[path]); + } + + iq_pi = queue_group->iq_pi_copy[path]; + + list_for_each_entry_safe(io_request, next, + &queue_group->request_list[path], request_list_entry) { + + request = io_request->iu; + + iu_length = get_unaligned_le16(&request->iu_length) + + PQI_REQUEST_HEADER_LENGTH; + num_elements_needed = + DIV_ROUND_UP(iu_length, + PQI_OPERATIONAL_IQ_ELEMENT_LENGTH); + + iq_ci = readl(queue_group->iq_ci[path]); + + if (num_elements_needed > pqi_num_elements_free(iq_pi, iq_ci, + ctrl_info->num_elements_per_iq)) + break; + + put_unaligned_le16(queue_group->oq_id, + &request->response_queue_id); + + next_element = queue_group->iq_element_array[path] + + (iq_pi * PQI_OPERATIONAL_IQ_ELEMENT_LENGTH); + + num_elements_to_end_of_queue = + ctrl_info->num_elements_per_iq - iq_pi; + + if (num_elements_needed <= num_elements_to_end_of_queue) { + memcpy(next_element, request, iu_length); + } else { + copy_count = num_elements_to_end_of_queue * + PQI_OPERATIONAL_IQ_ELEMENT_LENGTH; + memcpy(next_element, request, copy_count); + memcpy(queue_group->iq_element_array[path], + (u8 *)request + copy_count, + iu_length - copy_count); + } + + iq_pi = (iq_pi + num_elements_needed) % + ctrl_info->num_elements_per_iq; + + list_del(&io_request->request_list_entry); + } + + if (iq_pi != queue_group->iq_pi_copy[path]) { + queue_group->iq_pi_copy[path] = iq_pi; + /* + * This write notifies the controller that one or more IUs are + * available to be processed. + */ + writel(iq_pi, queue_group->iq_pi[path]); + } + + spin_unlock_irqrestore(&queue_group->submit_lock[path], flags); +} + +#define PQI_WAIT_FOR_COMPLETION_IO_TIMEOUT_SECS 10 + +static int pqi_wait_for_completion_io(struct pqi_ctrl_info *ctrl_info, + struct completion *wait) +{ + int rc; + + while (1) { + if (wait_for_completion_io_timeout(wait, + PQI_WAIT_FOR_COMPLETION_IO_TIMEOUT_SECS * PQI_HZ)) { + rc = 0; + break; + } + + pqi_check_ctrl_health(ctrl_info); + if (pqi_ctrl_offline(ctrl_info)) { + rc = -ENXIO; + break; + } + } + + return rc; +} + +static void pqi_raid_synchronous_complete(struct pqi_io_request *io_request, + void *context) +{ + struct completion *waiting = context; + + complete(waiting); +} + +static int pqi_process_raid_io_error_synchronous( + struct pqi_raid_error_info *error_info) +{ + int rc = -EIO; + + switch (error_info->data_out_result) { + case PQI_DATA_IN_OUT_GOOD: + if (error_info->status == SAM_STAT_GOOD) + rc = 0; + break; + case PQI_DATA_IN_OUT_UNDERFLOW: + if (error_info->status == SAM_STAT_GOOD || + error_info->status == SAM_STAT_CHECK_CONDITION) + rc = 0; + break; + case PQI_DATA_IN_OUT_ABORTED: + rc = PQI_CMD_STATUS_ABORTED; + break; + } + + return rc; +} + +static int pqi_submit_raid_request_synchronous(struct pqi_ctrl_info *ctrl_info, + struct pqi_iu_header *request, unsigned int flags, + struct pqi_raid_error_info *error_info, unsigned long timeout_msecs) +{ + int rc = 0; + struct pqi_io_request *io_request; + unsigned long start_jiffies; + unsigned long msecs_blocked; + size_t iu_length; + DECLARE_COMPLETION_ONSTACK(wait); + + /* + * Note that specifying PQI_SYNC_FLAGS_INTERRUPTABLE and a timeout value + * are mutually exclusive. + */ + + if (flags & PQI_SYNC_FLAGS_INTERRUPTABLE) { + if (down_interruptible(&ctrl_info->sync_request_sem)) + return -ERESTARTSYS; + } else { + if (timeout_msecs == NO_TIMEOUT) { + down(&ctrl_info->sync_request_sem); + } else { + start_jiffies = jiffies; + if (down_timeout(&ctrl_info->sync_request_sem, + msecs_to_jiffies(timeout_msecs))) + return -ETIMEDOUT; + msecs_blocked = + jiffies_to_msecs(jiffies - start_jiffies); + if (msecs_blocked >= timeout_msecs) { + rc = -ETIMEDOUT; + goto out; + } + timeout_msecs -= msecs_blocked; + } + } + + pqi_ctrl_busy(ctrl_info); + timeout_msecs = pqi_wait_if_ctrl_blocked(ctrl_info, timeout_msecs); + if (timeout_msecs == 0) { + pqi_ctrl_unbusy(ctrl_info); + rc = -ETIMEDOUT; + goto out; + } + + if (pqi_ctrl_offline(ctrl_info)) { + pqi_ctrl_unbusy(ctrl_info); + rc = -ENXIO; + goto out; + } + + atomic_inc(&ctrl_info->sync_cmds_outstanding); + + io_request = pqi_alloc_io_request(ctrl_info); + + put_unaligned_le16(io_request->index, + &(((struct pqi_raid_path_request *)request)->request_id)); + + if (request->iu_type == PQI_REQUEST_IU_RAID_PATH_IO) + ((struct pqi_raid_path_request *)request)->error_index = + ((struct pqi_raid_path_request *)request)->request_id; + + iu_length = get_unaligned_le16(&request->iu_length) + + PQI_REQUEST_HEADER_LENGTH; + memcpy(io_request->iu, request, iu_length); + + io_request->io_complete_callback = pqi_raid_synchronous_complete; + io_request->context = &wait; + + pqi_start_io(ctrl_info, + &ctrl_info->queue_groups[PQI_DEFAULT_QUEUE_GROUP], RAID_PATH, + io_request); + + pqi_ctrl_unbusy(ctrl_info); + + if (timeout_msecs == NO_TIMEOUT) { + pqi_wait_for_completion_io(ctrl_info, &wait); + } else { + if (!wait_for_completion_io_timeout(&wait, + msecs_to_jiffies(timeout_msecs))) { + dev_warn(&ctrl_info->pci_dev->dev, + "command timed out\n"); + rc = -ETIMEDOUT; + } + } + + if (error_info) { + if (io_request->error_info) + memcpy(error_info, io_request->error_info, + sizeof(*error_info)); + else + memset(error_info, 0, sizeof(*error_info)); + } else if (rc == 0 && io_request->error_info) { + rc = pqi_process_raid_io_error_synchronous( + io_request->error_info); + } + + pqi_free_io_request(io_request); + + atomic_dec(&ctrl_info->sync_cmds_outstanding); +out: + up(&ctrl_info->sync_request_sem); + + return rc; +} + +static int pqi_validate_admin_response( + struct pqi_general_admin_response *response, u8 expected_function_code) +{ + if (response->header.iu_type != PQI_RESPONSE_IU_GENERAL_ADMIN) + return -EINVAL; + + if (get_unaligned_le16(&response->header.iu_length) != + PQI_GENERAL_ADMIN_IU_LENGTH) + return -EINVAL; + + if (response->function_code != expected_function_code) + return -EINVAL; + + if (response->status != PQI_GENERAL_ADMIN_STATUS_SUCCESS) + return -EINVAL; + + return 0; +} + +static int pqi_submit_admin_request_synchronous( + struct pqi_ctrl_info *ctrl_info, + struct pqi_general_admin_request *request, + struct pqi_general_admin_response *response) +{ + int rc; + + pqi_submit_admin_request(ctrl_info, request); + + rc = pqi_poll_for_admin_response(ctrl_info, response); + + if (rc == 0) + rc = pqi_validate_admin_response(response, + request->function_code); + + return rc; +} + +static int pqi_report_device_capability(struct pqi_ctrl_info *ctrl_info) +{ + int rc; + struct pqi_general_admin_request request; + struct pqi_general_admin_response response; + struct pqi_device_capability *capability; + struct pqi_iu_layer_descriptor *sop_iu_layer_descriptor; + + capability = kmalloc(sizeof(*capability), GFP_KERNEL); + if (!capability) + return -ENOMEM; + + memset(&request, 0, sizeof(request)); + + request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN; + put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH, + &request.header.iu_length); + request.function_code = + PQI_GENERAL_ADMIN_FUNCTION_REPORT_DEVICE_CAPABILITY; + put_unaligned_le32(sizeof(*capability), + &request.data.report_device_capability.buffer_length); + + rc = pqi_map_single(ctrl_info->pci_dev, + &request.data.report_device_capability.sg_descriptor, + capability, sizeof(*capability), + DMA_FROM_DEVICE); + if (rc) + goto out; + + rc = pqi_submit_admin_request_synchronous(ctrl_info, &request, + &response); + + pqi_pci_unmap(ctrl_info->pci_dev, + &request.data.report_device_capability.sg_descriptor, 1, + DMA_FROM_DEVICE); + + if (rc) + goto out; + + if (response.status != PQI_GENERAL_ADMIN_STATUS_SUCCESS) { + rc = -EIO; + goto out; + } + + ctrl_info->max_inbound_queues = + get_unaligned_le16(&capability->max_inbound_queues); + ctrl_info->max_elements_per_iq = + get_unaligned_le16(&capability->max_elements_per_iq); + ctrl_info->max_iq_element_length = + get_unaligned_le16(&capability->max_iq_element_length) + * 16; + ctrl_info->max_outbound_queues = + get_unaligned_le16(&capability->max_outbound_queues); + ctrl_info->max_elements_per_oq = + get_unaligned_le16(&capability->max_elements_per_oq); + ctrl_info->max_oq_element_length = + get_unaligned_le16(&capability->max_oq_element_length) + * 16; + + sop_iu_layer_descriptor = + &capability->iu_layer_descriptors[PQI_PROTOCOL_SOP]; + + ctrl_info->max_inbound_iu_length_per_firmware = + get_unaligned_le16( + &sop_iu_layer_descriptor->max_inbound_iu_length); + ctrl_info->inbound_spanning_supported = + sop_iu_layer_descriptor->inbound_spanning_supported; + ctrl_info->outbound_spanning_supported = + sop_iu_layer_descriptor->outbound_spanning_supported; + +out: + kfree(capability); + + return rc; +} + +static int pqi_validate_device_capability(struct pqi_ctrl_info *ctrl_info) +{ + if (ctrl_info->max_iq_element_length < + PQI_OPERATIONAL_IQ_ELEMENT_LENGTH) { + dev_err(&ctrl_info->pci_dev->dev, + "max. inbound queue element length of %d is less than the required length of %d\n", + ctrl_info->max_iq_element_length, + PQI_OPERATIONAL_IQ_ELEMENT_LENGTH); + return -EINVAL; + } + + if (ctrl_info->max_oq_element_length < + PQI_OPERATIONAL_OQ_ELEMENT_LENGTH) { + dev_err(&ctrl_info->pci_dev->dev, + "max. outbound queue element length of %d is less than the required length of %d\n", + ctrl_info->max_oq_element_length, + PQI_OPERATIONAL_OQ_ELEMENT_LENGTH); + return -EINVAL; + } + + if (ctrl_info->max_inbound_iu_length_per_firmware < + PQI_OPERATIONAL_IQ_ELEMENT_LENGTH) { + dev_err(&ctrl_info->pci_dev->dev, + "max. inbound IU length of %u is less than the min. required length of %d\n", + ctrl_info->max_inbound_iu_length_per_firmware, + PQI_OPERATIONAL_IQ_ELEMENT_LENGTH); + return -EINVAL; + } + + if (!ctrl_info->inbound_spanning_supported) { + dev_err(&ctrl_info->pci_dev->dev, + "the controller does not support inbound spanning\n"); + return -EINVAL; + } + + if (ctrl_info->outbound_spanning_supported) { + dev_err(&ctrl_info->pci_dev->dev, + "the controller supports outbound spanning but this driver does not\n"); + return -EINVAL; + } + + return 0; +} + +static int pqi_create_event_queue(struct pqi_ctrl_info *ctrl_info) +{ + int rc; + struct pqi_event_queue *event_queue; + struct pqi_general_admin_request request; + struct pqi_general_admin_response response; + + event_queue = &ctrl_info->event_queue; + + /* + * Create OQ (Outbound Queue - device to host queue) to dedicate + * to events. + */ + memset(&request, 0, sizeof(request)); + request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN; + put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH, + &request.header.iu_length); + request.function_code = PQI_GENERAL_ADMIN_FUNCTION_CREATE_OQ; + put_unaligned_le16(event_queue->oq_id, + &request.data.create_operational_oq.queue_id); + put_unaligned_le64((u64)event_queue->oq_element_array_bus_addr, + &request.data.create_operational_oq.element_array_addr); + put_unaligned_le64((u64)event_queue->oq_pi_bus_addr, + &request.data.create_operational_oq.pi_addr); + put_unaligned_le16(PQI_NUM_EVENT_QUEUE_ELEMENTS, + &request.data.create_operational_oq.num_elements); + put_unaligned_le16(PQI_EVENT_OQ_ELEMENT_LENGTH / 16, + &request.data.create_operational_oq.element_length); + request.data.create_operational_oq.queue_protocol = PQI_PROTOCOL_SOP; + put_unaligned_le16(event_queue->int_msg_num, + &request.data.create_operational_oq.int_msg_num); + + rc = pqi_submit_admin_request_synchronous(ctrl_info, &request, + &response); + if (rc) + return rc; + + event_queue->oq_ci = ctrl_info->iomem_base + + PQI_DEVICE_REGISTERS_OFFSET + + get_unaligned_le64( + &response.data.create_operational_oq.oq_ci_offset); + + return 0; +} + +static int pqi_create_queue_group(struct pqi_ctrl_info *ctrl_info, + unsigned int group_number) +{ + int rc; + struct pqi_queue_group *queue_group; + struct pqi_general_admin_request request; + struct pqi_general_admin_response response; + + queue_group = &ctrl_info->queue_groups[group_number]; + + /* + * Create IQ (Inbound Queue - host to device queue) for + * RAID path. + */ + memset(&request, 0, sizeof(request)); + request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN; + put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH, + &request.header.iu_length); + request.function_code = PQI_GENERAL_ADMIN_FUNCTION_CREATE_IQ; + put_unaligned_le16(queue_group->iq_id[RAID_PATH], + &request.data.create_operational_iq.queue_id); + put_unaligned_le64( + (u64)queue_group->iq_element_array_bus_addr[RAID_PATH], + &request.data.create_operational_iq.element_array_addr); + put_unaligned_le64((u64)queue_group->iq_ci_bus_addr[RAID_PATH], + &request.data.create_operational_iq.ci_addr); + put_unaligned_le16(ctrl_info->num_elements_per_iq, + &request.data.create_operational_iq.num_elements); + put_unaligned_le16(PQI_OPERATIONAL_IQ_ELEMENT_LENGTH / 16, + &request.data.create_operational_iq.element_length); + request.data.create_operational_iq.queue_protocol = PQI_PROTOCOL_SOP; + + rc = pqi_submit_admin_request_synchronous(ctrl_info, &request, + &response); + if (rc) { + dev_err(&ctrl_info->pci_dev->dev, + "error creating inbound RAID queue\n"); + return rc; + } + + queue_group->iq_pi[RAID_PATH] = ctrl_info->iomem_base + + PQI_DEVICE_REGISTERS_OFFSET + + get_unaligned_le64( + &response.data.create_operational_iq.iq_pi_offset); + + /* + * Create IQ (Inbound Queue - host to device queue) for + * Advanced I/O (AIO) path. + */ + memset(&request, 0, sizeof(request)); + request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN; + put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH, + &request.header.iu_length); + request.function_code = PQI_GENERAL_ADMIN_FUNCTION_CREATE_IQ; + put_unaligned_le16(queue_group->iq_id[AIO_PATH], + &request.data.create_operational_iq.queue_id); + put_unaligned_le64((u64)queue_group-> + iq_element_array_bus_addr[AIO_PATH], + &request.data.create_operational_iq.element_array_addr); + put_unaligned_le64((u64)queue_group->iq_ci_bus_addr[AIO_PATH], + &request.data.create_operational_iq.ci_addr); + put_unaligned_le16(ctrl_info->num_elements_per_iq, + &request.data.create_operational_iq.num_elements); + put_unaligned_le16(PQI_OPERATIONAL_IQ_ELEMENT_LENGTH / 16, + &request.data.create_operational_iq.element_length); + request.data.create_operational_iq.queue_protocol = PQI_PROTOCOL_SOP; + + rc = pqi_submit_admin_request_synchronous(ctrl_info, &request, + &response); + if (rc) { + dev_err(&ctrl_info->pci_dev->dev, + "error creating inbound AIO queue\n"); + return rc; + } + + queue_group->iq_pi[AIO_PATH] = ctrl_info->iomem_base + + PQI_DEVICE_REGISTERS_OFFSET + + get_unaligned_le64( + &response.data.create_operational_iq.iq_pi_offset); + + /* + * Designate the 2nd IQ as the AIO path. By default, all IQs are + * assumed to be for RAID path I/O unless we change the queue's + * property. + */ + memset(&request, 0, sizeof(request)); + request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN; + put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH, + &request.header.iu_length); + request.function_code = PQI_GENERAL_ADMIN_FUNCTION_CHANGE_IQ_PROPERTY; + put_unaligned_le16(queue_group->iq_id[AIO_PATH], + &request.data.change_operational_iq_properties.queue_id); + put_unaligned_le32(PQI_IQ_PROPERTY_IS_AIO_QUEUE, + &request.data.change_operational_iq_properties.vendor_specific); + + rc = pqi_submit_admin_request_synchronous(ctrl_info, &request, + &response); + if (rc) { + dev_err(&ctrl_info->pci_dev->dev, + "error changing queue property\n"); + return rc; + } + + /* + * Create OQ (Outbound Queue - device to host queue). + */ + memset(&request, 0, sizeof(request)); + request.header.iu_type = PQI_REQUEST_IU_GENERAL_ADMIN; + put_unaligned_le16(PQI_GENERAL_ADMIN_IU_LENGTH, + &request.header.iu_length); + request.function_code = PQI_GENERAL_ADMIN_FUNCTION_CREATE_OQ; + put_unaligned_le16(queue_group->oq_id, + &request.data.create_operational_oq.queue_id); + put_unaligned_le64((u64)queue_group->oq_element_array_bus_addr, + &request.data.create_operational_oq.element_array_addr); + put_unaligned_le64((u64)queue_group->oq_pi_bus_addr, + &request.data.create_operational_oq.pi_addr); + put_unaligned_le16(ctrl_info->num_elements_per_oq, + &request.data.create_operational_oq.num_elements); + put_unaligned_le16(PQI_OPERATIONAL_OQ_ELEMENT_LENGTH / 16, + &request.data.create_operational_oq.element_length); + request.data.create_operational_oq.queue_protocol = PQI_PROTOCOL_SOP; + put_unaligned_le16(queue_group->int_msg_num, + &request.data.create_operational_oq.int_msg_num); + + rc = pqi_submit_admin_request_synchronous(ctrl_info, &request, + &response); + if (rc) { + dev_err(&ctrl_info->pci_dev->dev, + "error creating outbound queue\n"); + return rc; + } + + queue_group->oq_ci = ctrl_info->iomem_base + + PQI_DEVICE_REGISTERS_OFFSET + + get_unaligned_le64( + &response.data.create_operational_oq.oq_ci_offset); + + return 0; +} + +static int pqi_create_queues(struct pqi_ctrl_info *ctrl_info) +{ + int rc; + unsigned int i; + + rc = pqi_create_event_queue(ctrl_info); + if (rc) { + dev_err(&ctrl_info->pci_dev->dev, + "error creating event queue\n"); + return rc; + } + + for (i = 0; i < ctrl_info->num_queue_groups; i++) { + rc = pqi_create_queue_group(ctrl_info, i); + if (rc) { + dev_err(&ctrl_info->pci_dev->dev, + "error creating queue group number %u/%u\n", + i, ctrl_info->num_queue_groups); + return rc; + } + } + + return 0; +} + +#define PQI_REPORT_EVENT_CONFIG_BUFFER_LENGTH \ + (offsetof(struct pqi_event_config, descriptors) + \ + (PQI_MAX_EVENT_DESCRIPTORS * sizeof(struct pqi_event_descriptor))) + +static int pqi_configure_events(struct pqi_ctrl_info *ctrl_info, + bool enable_events) +{ + int rc; + unsigned int i; + struct pqi_event_config *event_config; + struct pqi_event_descriptor *event_descriptor; + struct pqi_general_management_request request; + + event_config = kmalloc(PQI_REPORT_EVENT_CONFIG_BUFFER_LENGTH, + GFP_KERNEL); + if (!event_config) + return -ENOMEM; + + memset(&request, 0, sizeof(request)); + + request.header.iu_type = PQI_REQUEST_IU_REPORT_VENDOR_EVENT_CONFIG; + put_unaligned_le16(offsetof(struct pqi_general_management_request, + data.report_event_configuration.sg_descriptors[1]) - + PQI_REQUEST_HEADER_LENGTH, &request.header.iu_length); + put_unaligned_le32(PQI_REPORT_EVENT_CONFIG_BUFFER_LENGTH, + &request.data.report_event_configuration.buffer_length); + + rc = pqi_map_single(ctrl_info->pci_dev, + request.data.report_event_configuration.sg_descriptors, + event_config, PQI_REPORT_EVENT_CONFIG_BUFFER_LENGTH, + DMA_FROM_DEVICE); + if (rc) + goto out; + + rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header, + 0, NULL, NO_TIMEOUT); + + pqi_pci_unmap(ctrl_info->pci_dev, + request.data.report_event_configuration.sg_descriptors, 1, + DMA_FROM_DEVICE); + + if (rc) + goto out; + + for (i = 0; i < event_config->num_event_descriptors; i++) { + event_descriptor = &event_config->descriptors[i]; + if (enable_events && + pqi_is_supported_event(event_descriptor->event_type)) + put_unaligned_le16(ctrl_info->event_queue.oq_id, + &event_descriptor->oq_id); + else + put_unaligned_le16(0, &event_descriptor->oq_id); + } + + memset(&request, 0, sizeof(request)); + + request.header.iu_type = PQI_REQUEST_IU_SET_VENDOR_EVENT_CONFIG; + put_unaligned_le16(offsetof(struct pqi_general_management_request, + data.report_event_configuration.sg_descriptors[1]) - + PQI_REQUEST_HEADER_LENGTH, &request.header.iu_length); + put_unaligned_le32(PQI_REPORT_EVENT_CONFIG_BUFFER_LENGTH, + &request.data.report_event_configuration.buffer_length); + + rc = pqi_map_single(ctrl_info->pci_dev, + request.data.report_event_configuration.sg_descriptors, + event_config, PQI_REPORT_EVENT_CONFIG_BUFFER_LENGTH, + DMA_TO_DEVICE); + if (rc) + goto out; + + rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header, 0, + NULL, NO_TIMEOUT); + + pqi_pci_unmap(ctrl_info->pci_dev, + request.data.report_event_configuration.sg_descriptors, 1, + DMA_TO_DEVICE); + +out: + kfree(event_config); + + return rc; +} + +static inline int pqi_enable_events(struct pqi_ctrl_info *ctrl_info) +{ + return pqi_configure_events(ctrl_info, true); +} + +static inline int pqi_disable_events(struct pqi_ctrl_info *ctrl_info) +{ + return pqi_configure_events(ctrl_info, false); +} + +static void pqi_free_all_io_requests(struct pqi_ctrl_info *ctrl_info) +{ + unsigned int i; + struct device *dev; + size_t sg_chain_buffer_length; + struct pqi_io_request *io_request; + + if (!ctrl_info->io_request_pool) + return; + + dev = &ctrl_info->pci_dev->dev; + sg_chain_buffer_length = ctrl_info->sg_chain_buffer_length; + io_request = ctrl_info->io_request_pool; + + for (i = 0; i < ctrl_info->max_io_slots; i++) { + kfree(io_request->iu); + if (!io_request->sg_chain_buffer) + break; + dma_free_coherent(dev, sg_chain_buffer_length, + io_request->sg_chain_buffer, + io_request->sg_chain_buffer_dma_handle); + io_request++; + } + + kfree(ctrl_info->io_request_pool); + ctrl_info->io_request_pool = NULL; +} + +static inline int pqi_alloc_error_buffer(struct pqi_ctrl_info *ctrl_info) +{ + + ctrl_info->error_buffer = dma_alloc_coherent(&ctrl_info->pci_dev->dev, + ctrl_info->error_buffer_length, + &ctrl_info->error_buffer_dma_handle, + GFP_KERNEL); + if (!ctrl_info->error_buffer) + return -ENOMEM; + + return 0; +} + +static int pqi_alloc_io_resources(struct pqi_ctrl_info *ctrl_info) +{ + unsigned int i; + void *sg_chain_buffer; + size_t sg_chain_buffer_length; + dma_addr_t sg_chain_buffer_dma_handle; + struct device *dev; + struct pqi_io_request *io_request; + + ctrl_info->io_request_pool = + kcalloc(ctrl_info->max_io_slots, + sizeof(ctrl_info->io_request_pool[0]), GFP_KERNEL); + + if (!ctrl_info->io_request_pool) { + dev_err(&ctrl_info->pci_dev->dev, + "failed to allocate I/O request pool\n"); + goto error; + } + + dev = &ctrl_info->pci_dev->dev; + sg_chain_buffer_length = ctrl_info->sg_chain_buffer_length; + io_request = ctrl_info->io_request_pool; + + for (i = 0; i < ctrl_info->max_io_slots; i++) { + io_request->iu = + kmalloc(ctrl_info->max_inbound_iu_length, GFP_KERNEL); + + if (!io_request->iu) { + dev_err(&ctrl_info->pci_dev->dev, + "failed to allocate IU buffers\n"); + goto error; + } + + sg_chain_buffer = dma_alloc_coherent(dev, + sg_chain_buffer_length, &sg_chain_buffer_dma_handle, + GFP_KERNEL); + + if (!sg_chain_buffer) { + dev_err(&ctrl_info->pci_dev->dev, + "failed to allocate PQI scatter-gather chain buffers\n"); + goto error; + } + + io_request->index = i; + io_request->sg_chain_buffer = sg_chain_buffer; + io_request->sg_chain_buffer_dma_handle = + sg_chain_buffer_dma_handle; + io_request++; + } + + return 0; + +error: + pqi_free_all_io_requests(ctrl_info); + + return -ENOMEM; +} + +/* + * Calculate required resources that are sized based on max. outstanding + * requests and max. transfer size. + */ + +static void pqi_calculate_io_resources(struct pqi_ctrl_info *ctrl_info) +{ + u32 max_transfer_size; + u32 max_sg_entries; + + ctrl_info->scsi_ml_can_queue = + ctrl_info->max_outstanding_requests - PQI_RESERVED_IO_SLOTS; + ctrl_info->max_io_slots = ctrl_info->max_outstanding_requests; + + ctrl_info->error_buffer_length = + ctrl_info->max_io_slots * PQI_ERROR_BUFFER_ELEMENT_LENGTH; + + if (reset_devices) + max_transfer_size = min(ctrl_info->max_transfer_size, + PQI_MAX_TRANSFER_SIZE_KDUMP); + else + max_transfer_size = min(ctrl_info->max_transfer_size, + PQI_MAX_TRANSFER_SIZE); + + max_sg_entries = max_transfer_size / PAGE_SIZE; + + /* +1 to cover when the buffer is not page-aligned. */ + max_sg_entries++; + + max_sg_entries = min(ctrl_info->max_sg_entries, max_sg_entries); + + max_transfer_size = (max_sg_entries - 1) * PAGE_SIZE; + + ctrl_info->sg_chain_buffer_length = + (max_sg_entries * sizeof(struct pqi_sg_descriptor)) + + PQI_EXTRA_SGL_MEMORY; + ctrl_info->sg_tablesize = max_sg_entries; + ctrl_info->max_sectors = max_transfer_size / 512; +} + +static void pqi_calculate_queue_resources(struct pqi_ctrl_info *ctrl_info) +{ + int num_queue_groups; + u16 num_elements_per_iq; + u16 num_elements_per_oq; + + if (reset_devices) { + num_queue_groups = 1; + } else { + int num_cpus; + int max_queue_groups; + + max_queue_groups = min(ctrl_info->max_inbound_queues / 2, + ctrl_info->max_outbound_queues - 1); + max_queue_groups = min(max_queue_groups, PQI_MAX_QUEUE_GROUPS); + + num_cpus = num_online_cpus(); + num_queue_groups = min(num_cpus, ctrl_info->max_msix_vectors); + num_queue_groups = min(num_queue_groups, max_queue_groups); + } + + ctrl_info->num_queue_groups = num_queue_groups; + ctrl_info->max_hw_queue_index = num_queue_groups - 1; + + /* + * Make sure that the max. inbound IU length is an even multiple + * of our inbound element length. + */ + ctrl_info->max_inbound_iu_length = + (ctrl_info->max_inbound_iu_length_per_firmware / + PQI_OPERATIONAL_IQ_ELEMENT_LENGTH) * + PQI_OPERATIONAL_IQ_ELEMENT_LENGTH; + + num_elements_per_iq = + (ctrl_info->max_inbound_iu_length / + PQI_OPERATIONAL_IQ_ELEMENT_LENGTH); + + /* Add one because one element in each queue is unusable. */ + num_elements_per_iq++; + + num_elements_per_iq = min(num_elements_per_iq, + ctrl_info->max_elements_per_iq); + + num_elements_per_oq = ((num_elements_per_iq - 1) * 2) + 1; + num_elements_per_oq = min(num_elements_per_oq, + ctrl_info->max_elements_per_oq); + + ctrl_info->num_elements_per_iq = num_elements_per_iq; + ctrl_info->num_elements_per_oq = num_elements_per_oq; + + ctrl_info->max_sg_per_iu = + ((ctrl_info->max_inbound_iu_length - + PQI_OPERATIONAL_IQ_ELEMENT_LENGTH) / + sizeof(struct pqi_sg_descriptor)) + + PQI_MAX_EMBEDDED_SG_DESCRIPTORS; +} + +static inline void pqi_set_sg_descriptor( + struct pqi_sg_descriptor *sg_descriptor, struct scatterlist *sg) +{ + u64 address = (u64)sg_dma_address(sg); + unsigned int length = sg_dma_len(sg); + + put_unaligned_le64(address, &sg_descriptor->address); + put_unaligned_le32(length, &sg_descriptor->length); + put_unaligned_le32(0, &sg_descriptor->flags); +} + +static int pqi_build_raid_sg_list(struct pqi_ctrl_info *ctrl_info, + struct pqi_raid_path_request *request, struct scsi_cmnd *scmd, + struct pqi_io_request *io_request) +{ + int i; + u16 iu_length; + int sg_count; + bool chained; + unsigned int num_sg_in_iu; + unsigned int max_sg_per_iu; + struct scatterlist *sg; + struct pqi_sg_descriptor *sg_descriptor; + + sg_count = scsi_dma_map(scmd); + if (sg_count < 0) + return sg_count; + + iu_length = offsetof(struct pqi_raid_path_request, sg_descriptors) - + PQI_REQUEST_HEADER_LENGTH; + + if (sg_count == 0) + goto out; + + sg = scsi_sglist(scmd); + sg_descriptor = request->sg_descriptors; + max_sg_per_iu = ctrl_info->max_sg_per_iu - 1; + chained = false; + num_sg_in_iu = 0; + i = 0; + + while (1) { + pqi_set_sg_descriptor(sg_descriptor, sg); + if (!chained) + num_sg_in_iu++; + i++; + if (i == sg_count) + break; + sg_descriptor++; + if (i == max_sg_per_iu) { + put_unaligned_le64( + (u64)io_request->sg_chain_buffer_dma_handle, + &sg_descriptor->address); + put_unaligned_le32((sg_count - num_sg_in_iu) + * sizeof(*sg_descriptor), + &sg_descriptor->length); + put_unaligned_le32(CISS_SG_CHAIN, + &sg_descriptor->flags); + chained = true; + num_sg_in_iu++; + sg_descriptor = io_request->sg_chain_buffer; + } + sg = sg_next(sg); + } + + put_unaligned_le32(CISS_SG_LAST, &sg_descriptor->flags); + request->partial = chained; + iu_length += num_sg_in_iu * sizeof(*sg_descriptor); + +out: + put_unaligned_le16(iu_length, &request->header.iu_length); + + return 0; +} + +static int pqi_build_aio_sg_list(struct pqi_ctrl_info *ctrl_info, + struct pqi_aio_path_request *request, struct scsi_cmnd *scmd, + struct pqi_io_request *io_request) +{ + int i; + u16 iu_length; + int sg_count; + bool chained; + unsigned int num_sg_in_iu; + unsigned int max_sg_per_iu; + struct scatterlist *sg; + struct pqi_sg_descriptor *sg_descriptor; + + sg_count = scsi_dma_map(scmd); + if (sg_count < 0) + return sg_count; + + iu_length = offsetof(struct pqi_aio_path_request, sg_descriptors) - + PQI_REQUEST_HEADER_LENGTH; + num_sg_in_iu = 0; + + if (sg_count == 0) + goto out; + + sg = scsi_sglist(scmd); + sg_descriptor = request->sg_descriptors; + max_sg_per_iu = ctrl_info->max_sg_per_iu - 1; + chained = false; + i = 0; + + while (1) { + pqi_set_sg_descriptor(sg_descriptor, sg); + if (!chained) + num_sg_in_iu++; + i++; + if (i == sg_count) + break; + sg_descriptor++; + if (i == max_sg_per_iu) { + put_unaligned_le64( + (u64)io_request->sg_chain_buffer_dma_handle, + &sg_descriptor->address); + put_unaligned_le32((sg_count - num_sg_in_iu) + * sizeof(*sg_descriptor), + &sg_descriptor->length); + put_unaligned_le32(CISS_SG_CHAIN, + &sg_descriptor->flags); + chained = true; + num_sg_in_iu++; + sg_descriptor = io_request->sg_chain_buffer; + } + sg = sg_next(sg); + } + + put_unaligned_le32(CISS_SG_LAST, &sg_descriptor->flags); + request->partial = chained; + iu_length += num_sg_in_iu * sizeof(*sg_descriptor); + +out: + put_unaligned_le16(iu_length, &request->header.iu_length); + request->num_sg_descriptors = num_sg_in_iu; + + return 0; +} + +static void pqi_raid_io_complete(struct pqi_io_request *io_request, + void *context) +{ + struct scsi_cmnd *scmd; + + scmd = io_request->scmd; + pqi_free_io_request(io_request); + scsi_dma_unmap(scmd); + pqi_scsi_done(scmd); +} + +static int pqi_raid_submit_scsi_cmd_with_io_request( + struct pqi_ctrl_info *ctrl_info, struct pqi_io_request *io_request, + struct pqi_scsi_dev *device, struct scsi_cmnd *scmd, + struct pqi_queue_group *queue_group) +{ + int rc; + size_t cdb_length; + struct pqi_raid_path_request *request; + + io_request->io_complete_callback = pqi_raid_io_complete; + io_request->scmd = scmd; + + request = io_request->iu; + memset(request, 0, + offsetof(struct pqi_raid_path_request, sg_descriptors)); + + request->header.iu_type = PQI_REQUEST_IU_RAID_PATH_IO; + put_unaligned_le32(scsi_bufflen(scmd), &request->buffer_length); + request->task_attribute = SOP_TASK_ATTRIBUTE_SIMPLE; + put_unaligned_le16(io_request->index, &request->request_id); + request->error_index = request->request_id; + memcpy(request->lun_number, device->scsi3addr, + sizeof(request->lun_number)); + + cdb_length = min_t(size_t, scmd->cmd_len, sizeof(request->cdb)); + memcpy(request->cdb, scmd->cmnd, cdb_length); + + switch (cdb_length) { + case 6: + case 10: + case 12: + case 16: + /* No bytes in the Additional CDB bytes field */ + request->additional_cdb_bytes_usage = + SOP_ADDITIONAL_CDB_BYTES_0; + break; + case 20: + /* 4 bytes in the Additional cdb field */ + request->additional_cdb_bytes_usage = + SOP_ADDITIONAL_CDB_BYTES_4; + break; + case 24: + /* 8 bytes in the Additional cdb field */ + request->additional_cdb_bytes_usage = + SOP_ADDITIONAL_CDB_BYTES_8; + break; + case 28: + /* 12 bytes in the Additional cdb field */ + request->additional_cdb_bytes_usage = + SOP_ADDITIONAL_CDB_BYTES_12; + break; + case 32: + default: + /* 16 bytes in the Additional cdb field */ + request->additional_cdb_bytes_usage = + SOP_ADDITIONAL_CDB_BYTES_16; + break; + } + + switch (scmd->sc_data_direction) { + case DMA_FROM_DEVICE: + request->data_direction = SOP_READ_FLAG; + break; + case DMA_TO_DEVICE: + request->data_direction = SOP_WRITE_FLAG; + break; + case DMA_NONE: + request->data_direction = SOP_NO_DIRECTION_FLAG; + break; + case DMA_BIDIRECTIONAL: + request->data_direction = SOP_BIDIRECTIONAL; + break; + default: + dev_err(&ctrl_info->pci_dev->dev, + "unknown data direction: %d\n", + scmd->sc_data_direction); + break; + } + + rc = pqi_build_raid_sg_list(ctrl_info, request, scmd, io_request); + if (rc) { + pqi_free_io_request(io_request); + return SCSI_MLQUEUE_HOST_BUSY; + } + + pqi_start_io(ctrl_info, queue_group, RAID_PATH, io_request); + + return 0; +} + +static inline int pqi_raid_submit_scsi_cmd(struct pqi_ctrl_info *ctrl_info, + struct pqi_scsi_dev *device, struct scsi_cmnd *scmd, + struct pqi_queue_group *queue_group) +{ + struct pqi_io_request *io_request; + + io_request = pqi_alloc_io_request(ctrl_info); + + return pqi_raid_submit_scsi_cmd_with_io_request(ctrl_info, io_request, + device, scmd, queue_group); +} + +static inline void pqi_schedule_bypass_retry(struct pqi_ctrl_info *ctrl_info) +{ + if (!pqi_ctrl_blocked(ctrl_info)) + schedule_work(&ctrl_info->raid_bypass_retry_work); +} + +static bool pqi_raid_bypass_retry_needed(struct pqi_io_request *io_request) +{ + struct scsi_cmnd *scmd; + struct pqi_scsi_dev *device; + struct pqi_ctrl_info *ctrl_info; + + if (!io_request->raid_bypass) + return false; + + scmd = io_request->scmd; + if ((scmd->result & 0xff) == SAM_STAT_GOOD) + return false; + if (host_byte(scmd->result) == DID_NO_CONNECT) + return false; + + device = scmd->device->hostdata; + if (pqi_device_offline(device)) + return false; + + ctrl_info = shost_to_hba(scmd->device->host); + if (pqi_ctrl_offline(ctrl_info)) + return false; + + return true; +} + +static inline void pqi_add_to_raid_bypass_retry_list( + struct pqi_ctrl_info *ctrl_info, + struct pqi_io_request *io_request, bool at_head) +{ + unsigned long flags; + + spin_lock_irqsave(&ctrl_info->raid_bypass_retry_list_lock, flags); + if (at_head) + list_add(&io_request->request_list_entry, + &ctrl_info->raid_bypass_retry_list); + else + list_add_tail(&io_request->request_list_entry, + &ctrl_info->raid_bypass_retry_list); + spin_unlock_irqrestore(&ctrl_info->raid_bypass_retry_list_lock, flags); +} + +static void pqi_queued_raid_bypass_complete(struct pqi_io_request *io_request, + void *context) +{ + struct scsi_cmnd *scmd; + + scmd = io_request->scmd; + pqi_free_io_request(io_request); + pqi_scsi_done(scmd); +} + +static void pqi_queue_raid_bypass_retry(struct pqi_io_request *io_request) +{ + struct scsi_cmnd *scmd; + struct pqi_ctrl_info *ctrl_info; + + io_request->io_complete_callback = pqi_queued_raid_bypass_complete; + scmd = io_request->scmd; + scmd->result = 0; + ctrl_info = shost_to_hba(scmd->device->host); + + pqi_add_to_raid_bypass_retry_list(ctrl_info, io_request, false); + pqi_schedule_bypass_retry(ctrl_info); +} + +static int pqi_retry_raid_bypass(struct pqi_io_request *io_request) +{ + struct scsi_cmnd *scmd; + struct pqi_scsi_dev *device; + struct pqi_ctrl_info *ctrl_info; + struct pqi_queue_group *queue_group; + + scmd = io_request->scmd; + device = scmd->device->hostdata; + if (pqi_device_in_reset(device)) { + pqi_free_io_request(io_request); + set_host_byte(scmd, DID_RESET); + pqi_scsi_done(scmd); + return 0; + } + + ctrl_info = shost_to_hba(scmd->device->host); + queue_group = io_request->queue_group; + + pqi_reinit_io_request(io_request); + + return pqi_raid_submit_scsi_cmd_with_io_request(ctrl_info, io_request, + device, scmd, queue_group); +} + +static inline struct pqi_io_request *pqi_next_queued_raid_bypass_request( + struct pqi_ctrl_info *ctrl_info) +{ + unsigned long flags; + struct pqi_io_request *io_request; + + spin_lock_irqsave(&ctrl_info->raid_bypass_retry_list_lock, flags); + io_request = list_first_entry_or_null( + &ctrl_info->raid_bypass_retry_list, + struct pqi_io_request, request_list_entry); + if (io_request) + list_del(&io_request->request_list_entry); + spin_unlock_irqrestore(&ctrl_info->raid_bypass_retry_list_lock, flags); + + return io_request; +} + +static void pqi_retry_raid_bypass_requests(struct pqi_ctrl_info *ctrl_info) +{ + int rc; + struct pqi_io_request *io_request; + + pqi_ctrl_busy(ctrl_info); + + while (1) { + if (pqi_ctrl_blocked(ctrl_info)) + break; + io_request = pqi_next_queued_raid_bypass_request(ctrl_info); + if (!io_request) + break; + rc = pqi_retry_raid_bypass(io_request); + if (rc) { + pqi_add_to_raid_bypass_retry_list(ctrl_info, io_request, + true); + pqi_schedule_bypass_retry(ctrl_info); + break; + } + } + + pqi_ctrl_unbusy(ctrl_info); +} + +static void pqi_raid_bypass_retry_worker(struct work_struct *work) +{ + struct pqi_ctrl_info *ctrl_info; + + ctrl_info = container_of(work, struct pqi_ctrl_info, + raid_bypass_retry_work); + pqi_retry_raid_bypass_requests(ctrl_info); +} + +static void pqi_clear_all_queued_raid_bypass_retries( + struct pqi_ctrl_info *ctrl_info) +{ + unsigned long flags; + + spin_lock_irqsave(&ctrl_info->raid_bypass_retry_list_lock, flags); + INIT_LIST_HEAD(&ctrl_info->raid_bypass_retry_list); + spin_unlock_irqrestore(&ctrl_info->raid_bypass_retry_list_lock, flags); +} + +static void pqi_aio_io_complete(struct pqi_io_request *io_request, + void *context) +{ + struct scsi_cmnd *scmd; + + scmd = io_request->scmd; + scsi_dma_unmap(scmd); + if (io_request->status == -EAGAIN) + set_host_byte(scmd, DID_IMM_RETRY); + else if (pqi_raid_bypass_retry_needed(io_request)) { + pqi_queue_raid_bypass_retry(io_request); + return; + } + pqi_free_io_request(io_request); + pqi_scsi_done(scmd); +} + +static inline int pqi_aio_submit_scsi_cmd(struct pqi_ctrl_info *ctrl_info, + struct pqi_scsi_dev *device, struct scsi_cmnd *scmd, + struct pqi_queue_group *queue_group) +{ + return pqi_aio_submit_io(ctrl_info, scmd, device->aio_handle, + scmd->cmnd, scmd->cmd_len, queue_group, NULL, false); +} + +static int pqi_aio_submit_io(struct pqi_ctrl_info *ctrl_info, + struct scsi_cmnd *scmd, u32 aio_handle, u8 *cdb, + unsigned int cdb_length, struct pqi_queue_group *queue_group, + struct pqi_encryption_info *encryption_info, bool raid_bypass) +{ + int rc; + struct pqi_io_request *io_request; + struct pqi_aio_path_request *request; + + io_request = pqi_alloc_io_request(ctrl_info); + io_request->io_complete_callback = pqi_aio_io_complete; + io_request->scmd = scmd; + io_request->raid_bypass = raid_bypass; + + request = io_request->iu; + memset(request, 0, + offsetof(struct pqi_raid_path_request, sg_descriptors)); + + request->header.iu_type = PQI_REQUEST_IU_AIO_PATH_IO; + put_unaligned_le32(aio_handle, &request->nexus_id); + put_unaligned_le32(scsi_bufflen(scmd), &request->buffer_length); + request->task_attribute = SOP_TASK_ATTRIBUTE_SIMPLE; + put_unaligned_le16(io_request->index, &request->request_id); + request->error_index = request->request_id; + if (cdb_length > sizeof(request->cdb)) + cdb_length = sizeof(request->cdb); + request->cdb_length = cdb_length; + memcpy(request->cdb, cdb, cdb_length); + + switch (scmd->sc_data_direction) { + case DMA_TO_DEVICE: + request->data_direction = SOP_READ_FLAG; + break; + case DMA_FROM_DEVICE: + request->data_direction = SOP_WRITE_FLAG; + break; + case DMA_NONE: + request->data_direction = SOP_NO_DIRECTION_FLAG; + break; + case DMA_BIDIRECTIONAL: + request->data_direction = SOP_BIDIRECTIONAL; + break; + default: + dev_err(&ctrl_info->pci_dev->dev, + "unknown data direction: %d\n", + scmd->sc_data_direction); + break; + } + + if (encryption_info) { + request->encryption_enable = true; + put_unaligned_le16(encryption_info->data_encryption_key_index, + &request->data_encryption_key_index); + put_unaligned_le32(encryption_info->encrypt_tweak_lower, + &request->encrypt_tweak_lower); + put_unaligned_le32(encryption_info->encrypt_tweak_upper, + &request->encrypt_tweak_upper); + } + + rc = pqi_build_aio_sg_list(ctrl_info, request, scmd, io_request); + if (rc) { + pqi_free_io_request(io_request); + return SCSI_MLQUEUE_HOST_BUSY; + } + + pqi_start_io(ctrl_info, queue_group, AIO_PATH, io_request); + + return 0; +} + +static inline u16 pqi_get_hw_queue(struct pqi_ctrl_info *ctrl_info, + struct scsi_cmnd *scmd) +{ + u16 hw_queue; + + hw_queue = blk_mq_unique_tag_to_hwq(blk_mq_unique_tag(scmd->request)); + if (hw_queue > ctrl_info->max_hw_queue_index) + hw_queue = 0; + + return hw_queue; +} + +/* + * This function gets called just before we hand the completed SCSI request + * back to the SML. + */ + +void pqi_prep_for_scsi_done(struct scsi_cmnd *scmd) +{ + struct pqi_scsi_dev *device; + + if (!scmd->device) { + set_host_byte(scmd, DID_NO_CONNECT); + return; + } + + device = scmd->device->hostdata; + if (!device) { + set_host_byte(scmd, DID_NO_CONNECT); + return; + } + + atomic_dec(&device->scsi_cmds_outstanding); +} + +static int pqi_scsi_queue_command(struct Scsi_Host *shost, + struct scsi_cmnd *scmd) +{ + int rc; + struct pqi_ctrl_info *ctrl_info; + struct pqi_scsi_dev *device; + u16 hw_queue; + struct pqi_queue_group *queue_group; + bool raid_bypassed; + + device = scmd->device->hostdata; + ctrl_info = shost_to_hba(shost); + + if (!device) { + set_host_byte(scmd, DID_NO_CONNECT); + pqi_scsi_done(scmd); + return 0; + } + + atomic_inc(&device->scsi_cmds_outstanding); + + if (pqi_ctrl_offline(ctrl_info) || pqi_device_in_remove(ctrl_info, + device)) { + set_host_byte(scmd, DID_NO_CONNECT); + pqi_scsi_done(scmd); + return 0; + } + + pqi_ctrl_busy(ctrl_info); + if (pqi_ctrl_blocked(ctrl_info) || pqi_device_in_reset(device) || + pqi_ctrl_in_ofa(ctrl_info) || pqi_ctrl_in_shutdown(ctrl_info)) { + rc = SCSI_MLQUEUE_HOST_BUSY; + goto out; + } + + /* + * This is necessary because the SML doesn't zero out this field during + * error recovery. + */ + scmd->result = 0; + + hw_queue = pqi_get_hw_queue(ctrl_info, scmd); + queue_group = &ctrl_info->queue_groups[hw_queue]; + + if (pqi_is_logical_device(device)) { + raid_bypassed = false; + if (device->raid_bypass_enabled && + !blk_rq_is_passthrough(scmd->request)) { + rc = pqi_raid_bypass_submit_scsi_cmd(ctrl_info, device, + scmd, queue_group); + if (rc == 0 || rc == SCSI_MLQUEUE_HOST_BUSY) { + raid_bypassed = true; + atomic_inc(&device->raid_bypass_cnt); + } + } + if (!raid_bypassed) + rc = pqi_raid_submit_scsi_cmd(ctrl_info, device, scmd, queue_group); + } else { + if (device->aio_enabled) + rc = pqi_aio_submit_scsi_cmd(ctrl_info, device, scmd, queue_group); + else + rc = pqi_raid_submit_scsi_cmd(ctrl_info, device, scmd, queue_group); + } + +out: + pqi_ctrl_unbusy(ctrl_info); + if (rc) + atomic_dec(&device->scsi_cmds_outstanding); + + return rc; +} + +static int pqi_wait_until_queued_io_drained(struct pqi_ctrl_info *ctrl_info, + struct pqi_queue_group *queue_group) +{ + unsigned int path; + unsigned long flags; + bool list_is_empty; + + for (path = 0; path < 2; path++) { + while (1) { + spin_lock_irqsave( + &queue_group->submit_lock[path], flags); + list_is_empty = + list_empty(&queue_group->request_list[path]); + spin_unlock_irqrestore( + &queue_group->submit_lock[path], flags); + if (list_is_empty) + break; + pqi_check_ctrl_health(ctrl_info); + if (pqi_ctrl_offline(ctrl_info)) + return -ENXIO; + usleep_range(1000, 2000); + } + } + + return 0; +} + +static int pqi_wait_until_inbound_queues_empty(struct pqi_ctrl_info *ctrl_info) +{ + int rc; + unsigned int i; + unsigned int path; + struct pqi_queue_group *queue_group; + pqi_index_t iq_pi; + pqi_index_t iq_ci; + + for (i = 0; i < ctrl_info->num_queue_groups; i++) { + queue_group = &ctrl_info->queue_groups[i]; + + rc = pqi_wait_until_queued_io_drained(ctrl_info, queue_group); + if (rc) + return rc; + + for (path = 0; path < 2; path++) { + iq_pi = queue_group->iq_pi_copy[path]; + + while (1) { + iq_ci = readl(queue_group->iq_ci[path]); + if (iq_ci == iq_pi) + break; + pqi_check_ctrl_health(ctrl_info); + if (pqi_ctrl_offline(ctrl_info)) + return -ENXIO; + usleep_range(1000, 2000); + } + } + } + + return 0; +} + +static void pqi_fail_io_queued_for_device(struct pqi_ctrl_info *ctrl_info, + struct pqi_scsi_dev *device) +{ + unsigned int i; + unsigned int path; + struct pqi_queue_group *queue_group; + unsigned long flags; + struct pqi_io_request *io_request; + struct pqi_io_request *next; + struct scsi_cmnd *scmd; + struct pqi_scsi_dev *scsi_device; + + for (i = 0; i < ctrl_info->num_queue_groups; i++) { + queue_group = &ctrl_info->queue_groups[i]; + + for (path = 0; path < 2; path++) { + spin_lock_irqsave( + &queue_group->submit_lock[path], flags); + + list_for_each_entry_safe(io_request, next, + &queue_group->request_list[path], + request_list_entry) { + scmd = io_request->scmd; + if (!scmd) + continue; + + scsi_device = scmd->device->hostdata; + if (scsi_device != device) + continue; + + list_del(&io_request->request_list_entry); + set_host_byte(scmd, DID_RESET); + pqi_free_io_request(io_request); + scsi_dma_unmap(scmd); + pqi_scsi_done(scmd); + } + + spin_unlock_irqrestore( + &queue_group->submit_lock[path], flags); + } + } +} + +static void pqi_fail_io_queued_for_all_devices(struct pqi_ctrl_info *ctrl_info) +{ + unsigned int i; + unsigned int path; + struct pqi_queue_group *queue_group; + unsigned long flags; + struct pqi_io_request *io_request; + struct pqi_io_request *next; + struct scsi_cmnd *scmd; + + for (i = 0; i < ctrl_info->num_queue_groups; i++) { + queue_group = &ctrl_info->queue_groups[i]; + + for (path = 0; path < 2; path++) { + spin_lock_irqsave(&queue_group->submit_lock[path], + flags); + + list_for_each_entry_safe(io_request, next, + &queue_group->request_list[path], + request_list_entry) { + + scmd = io_request->scmd; + if (!scmd) + continue; + + list_del(&io_request->request_list_entry); + set_host_byte(scmd, DID_RESET); + pqi_free_io_request(io_request); + scsi_dma_unmap(scmd); + pqi_scsi_done(scmd); + } + + spin_unlock_irqrestore( + &queue_group->submit_lock[path], flags); + } + } +} + +static int pqi_device_wait_for_pending_io(struct pqi_ctrl_info *ctrl_info, + struct pqi_scsi_dev *device, unsigned long timeout_secs) +{ + unsigned long timeout; + + timeout = (timeout_secs * PQI_HZ) + jiffies; + + while (atomic_read(&device->scsi_cmds_outstanding)) { + pqi_check_ctrl_health(ctrl_info); + if (pqi_ctrl_offline(ctrl_info)) + return -ENXIO; + if (timeout_secs != NO_TIMEOUT) { + if (time_after(jiffies, timeout)) { + dev_err(&ctrl_info->pci_dev->dev, + "timed out waiting for pending IO\n"); + return -ETIMEDOUT; + } + } + usleep_range(1000, 2000); + } + + return 0; +} + +static int pqi_ctrl_wait_for_pending_io(struct pqi_ctrl_info *ctrl_info, + unsigned long timeout_secs) +{ + bool io_pending; + unsigned long flags; + unsigned long timeout; + struct pqi_scsi_dev *device; + + timeout = (timeout_secs * PQI_HZ) + jiffies; + while (1) { + io_pending = false; + + spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags); + list_for_each_entry(device, &ctrl_info->scsi_device_list, + scsi_device_list_entry) { + if (atomic_read(&device->scsi_cmds_outstanding)) { + io_pending = true; + break; + } + } + spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, + flags); + + if (!io_pending) + break; + + pqi_check_ctrl_health(ctrl_info); + if (pqi_ctrl_offline(ctrl_info)) + return -ENXIO; + + if (timeout_secs != NO_TIMEOUT) { + if (time_after(jiffies, timeout)) { + dev_err(&ctrl_info->pci_dev->dev, + "timed out waiting for pending IO\n"); + return -ETIMEDOUT; + } + } + usleep_range(1000, 2000); + } + + return 0; +} + +static int pqi_ctrl_wait_for_pending_sync_cmds(struct pqi_ctrl_info *ctrl_info) +{ + while (atomic_read(&ctrl_info->sync_cmds_outstanding)) { + pqi_check_ctrl_health(ctrl_info); + if (pqi_ctrl_offline(ctrl_info)) + return -ENXIO; + usleep_range(1000, 2000); + } + + return 0; +} + +static void pqi_lun_reset_complete(struct pqi_io_request *io_request, + void *context) +{ + struct completion *waiting = context; + + complete(waiting); +} + +#define PQI_LUN_RESET_TIMEOUT_SECS 30 +#define PQI_LUN_RESET_POLL_COMPLETION_SECS 10 + +static int pqi_wait_for_lun_reset_completion(struct pqi_ctrl_info *ctrl_info, + struct pqi_scsi_dev *device, struct completion *wait) +{ + int rc; + + while (1) { + if (wait_for_completion_io_timeout(wait, + PQI_LUN_RESET_POLL_COMPLETION_SECS * PQI_HZ)) { + rc = 0; + break; + } + + pqi_check_ctrl_health(ctrl_info); + if (pqi_ctrl_offline(ctrl_info)) { + rc = -ENXIO; + break; + } + } + + return rc; +} + +static int pqi_lun_reset(struct pqi_ctrl_info *ctrl_info, + struct pqi_scsi_dev *device) +{ + int rc; + struct pqi_io_request *io_request; + DECLARE_COMPLETION_ONSTACK(wait); + struct pqi_task_management_request *request; + + io_request = pqi_alloc_io_request(ctrl_info); + io_request->io_complete_callback = pqi_lun_reset_complete; + io_request->context = &wait; + + request = io_request->iu; + memset(request, 0, sizeof(*request)); + + request->header.iu_type = PQI_REQUEST_IU_TASK_MANAGEMENT; + put_unaligned_le16(sizeof(*request) - PQI_REQUEST_HEADER_LENGTH, + &request->header.iu_length); + put_unaligned_le16(io_request->index, &request->request_id); + memcpy(request->lun_number, device->scsi3addr, + sizeof(request->lun_number)); + request->task_management_function = SOP_TASK_MANAGEMENT_LUN_RESET; + if (ctrl_info->tmf_iu_timeout_supported) + put_unaligned_le16(PQI_LUN_RESET_TIMEOUT_SECS, + &request->timeout); + + pqi_start_io(ctrl_info, + &ctrl_info->queue_groups[PQI_DEFAULT_QUEUE_GROUP], RAID_PATH, + io_request); + + rc = pqi_wait_for_lun_reset_completion(ctrl_info, device, &wait); + if (rc == 0) + rc = io_request->status; + + pqi_free_io_request(io_request); + + return rc; +} + +/* Performs a reset at the LUN level. */ + +#define PQI_LUN_RESET_RETRIES 3 +#define PQI_LUN_RESET_RETRY_INTERVAL_MSECS 10000 +#define PQI_LUN_RESET_PENDING_IO_TIMEOUT_SECS 120 + +static int _pqi_device_reset(struct pqi_ctrl_info *ctrl_info, + struct pqi_scsi_dev *device) +{ + int rc; + unsigned int retries; + unsigned long timeout_secs; + + for (retries = 0;;) { + rc = pqi_lun_reset(ctrl_info, device); + if (rc == 0 || ++retries > PQI_LUN_RESET_RETRIES) + break; + msleep(PQI_LUN_RESET_RETRY_INTERVAL_MSECS); + } + + timeout_secs = rc ? PQI_LUN_RESET_PENDING_IO_TIMEOUT_SECS : NO_TIMEOUT; + + rc |= pqi_device_wait_for_pending_io(ctrl_info, device, timeout_secs); + + return rc == 0 ? SUCCESS : FAILED; +} + +static int pqi_device_reset(struct pqi_ctrl_info *ctrl_info, + struct pqi_scsi_dev *device) +{ + int rc; + + mutex_lock(&ctrl_info->lun_reset_mutex); + + pqi_ctrl_block_requests(ctrl_info); + pqi_ctrl_wait_until_quiesced(ctrl_info); + pqi_fail_io_queued_for_device(ctrl_info, device); + rc = pqi_wait_until_inbound_queues_empty(ctrl_info); + pqi_device_reset_start(device); + pqi_ctrl_unblock_requests(ctrl_info); + + if (rc) + rc = FAILED; + else + rc = _pqi_device_reset(ctrl_info, device); + + pqi_device_reset_done(device); + + mutex_unlock(&ctrl_info->lun_reset_mutex); + + return rc; +} + +static int pqi_eh_device_reset_handler(struct scsi_cmnd *scmd) +{ + int rc; + struct Scsi_Host *shost; + struct pqi_ctrl_info *ctrl_info; + struct pqi_scsi_dev *device; + + shost = scmd->device->host; + ctrl_info = shost_to_hba(shost); + device = scmd->device->hostdata; + + dev_err(&ctrl_info->pci_dev->dev, + "resetting scsi %d:%d:%d:%d\n", + shost->host_no, device->bus, device->target, device->lun); + + pqi_check_ctrl_health(ctrl_info); + if (pqi_ctrl_offline(ctrl_info) || + pqi_device_reset_blocked(ctrl_info)) { + rc = FAILED; + goto out; + } + + pqi_wait_until_ofa_finished(ctrl_info); + + atomic_inc(&ctrl_info->sync_cmds_outstanding); + rc = pqi_device_reset(ctrl_info, device); + atomic_dec(&ctrl_info->sync_cmds_outstanding); + +out: + dev_err(&ctrl_info->pci_dev->dev, + "reset of scsi %d:%d:%d:%d: %s\n", + shost->host_no, device->bus, device->target, device->lun, + rc == SUCCESS ? "SUCCESS" : "FAILED"); + + return rc; +} + +static int pqi_slave_alloc(struct scsi_device *sdev) +{ + struct pqi_scsi_dev *device; + unsigned long flags; + struct pqi_ctrl_info *ctrl_info; + struct scsi_target *starget; + struct sas_rphy *rphy; + + ctrl_info = shost_to_hba(sdev->host); + + spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags); + + if (sdev_channel(sdev) == PQI_PHYSICAL_DEVICE_BUS) { + starget = scsi_target(sdev); + rphy = target_to_rphy(starget); + device = pqi_find_device_by_sas_rphy(ctrl_info, rphy); + if (device) { + device->target = sdev_id(sdev); + device->lun = sdev->lun; + device->target_lun_valid = true; + } + } else { + device = pqi_find_scsi_dev(ctrl_info, sdev_channel(sdev), + sdev_id(sdev), sdev->lun); + } + + if (device) { + sdev->hostdata = device; + device->sdev = sdev; + if (device->queue_depth) { + device->advertised_queue_depth = device->queue_depth; + scsi_change_queue_depth(sdev, + device->advertised_queue_depth); + } + if (pqi_is_logical_device(device)) + pqi_disable_write_same(sdev); + else + sdev->allow_restart = 1; + } + + spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags); + + return 0; +} + +static int pqi_map_queues(struct Scsi_Host *shost) +{ + struct pqi_ctrl_info *ctrl_info = shost_to_hba(shost); + + return blk_mq_pci_map_queues(&shost->tag_set.map[HCTX_TYPE_DEFAULT], + ctrl_info->pci_dev, 0); +} + +static int pqi_slave_configure(struct scsi_device *sdev) +{ + struct pqi_scsi_dev *device; + + device = sdev->hostdata; + device->devtype = sdev->type; + + return 0; +} + +static void pqi_slave_destroy(struct scsi_device *sdev) +{ + unsigned long flags; + struct pqi_scsi_dev *device; + struct pqi_ctrl_info *ctrl_info; + + ctrl_info = shost_to_hba(sdev->host); + + spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags); + + device = sdev->hostdata; + if (device) { + sdev->hostdata = NULL; + if (!list_empty(&device->scsi_device_list_entry)) + list_del(&device->scsi_device_list_entry); + } + + spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags); + + if (device) { + pqi_dev_info(ctrl_info, "removed", device); + pqi_free_device(device); + } +} + +static int pqi_getpciinfo_ioctl(struct pqi_ctrl_info *ctrl_info, void __user *arg) +{ + struct pci_dev *pci_dev; + u32 subsystem_vendor; + u32 subsystem_device; + cciss_pci_info_struct pciinfo; + + if (!arg) + return -EINVAL; + + pci_dev = ctrl_info->pci_dev; + + pciinfo.domain = pci_domain_nr(pci_dev->bus); + pciinfo.bus = pci_dev->bus->number; + pciinfo.dev_fn = pci_dev->devfn; + subsystem_vendor = pci_dev->subsystem_vendor; + subsystem_device = pci_dev->subsystem_device; + pciinfo.board_id = ((subsystem_device << 16) & 0xffff0000) | subsystem_vendor; + + if (copy_to_user(arg, &pciinfo, sizeof(pciinfo))) + return -EFAULT; + + return 0; +} + +static int pqi_getdrivver_ioctl(void __user *arg) +{ + u32 version; + + if (!arg) + return -EINVAL; + + version = (DRIVER_MAJOR << 28) | (DRIVER_MINOR << 24) | + (DRIVER_RELEASE << 16) | DRIVER_REVISION; + + if (copy_to_user(arg, &version, sizeof(version))) + return -EFAULT; + + return 0; +} + +struct ciss_error_info { + u8 scsi_status; + int command_status; + size_t sense_data_length; +}; + +static void pqi_error_info_to_ciss(struct pqi_raid_error_info *pqi_error_info, + struct ciss_error_info *ciss_error_info) +{ + int ciss_cmd_status; + size_t sense_data_length; + + switch (pqi_error_info->data_out_result) { + case PQI_DATA_IN_OUT_GOOD: + ciss_cmd_status = CISS_CMD_STATUS_SUCCESS; + break; + case PQI_DATA_IN_OUT_UNDERFLOW: + ciss_cmd_status = CISS_CMD_STATUS_DATA_UNDERRUN; + break; + case PQI_DATA_IN_OUT_BUFFER_OVERFLOW: + ciss_cmd_status = CISS_CMD_STATUS_DATA_OVERRUN; + break; + case PQI_DATA_IN_OUT_PROTOCOL_ERROR: + case PQI_DATA_IN_OUT_BUFFER_ERROR: + case PQI_DATA_IN_OUT_BUFFER_OVERFLOW_DESCRIPTOR_AREA: + case PQI_DATA_IN_OUT_BUFFER_OVERFLOW_BRIDGE: + case PQI_DATA_IN_OUT_ERROR: + ciss_cmd_status = CISS_CMD_STATUS_PROTOCOL_ERROR; + break; + case PQI_DATA_IN_OUT_HARDWARE_ERROR: + case PQI_DATA_IN_OUT_PCIE_FABRIC_ERROR: + case PQI_DATA_IN_OUT_PCIE_COMPLETION_TIMEOUT: + case PQI_DATA_IN_OUT_PCIE_COMPLETER_ABORT_RECEIVED: + case PQI_DATA_IN_OUT_PCIE_UNSUPPORTED_REQUEST_RECEIVED: + case PQI_DATA_IN_OUT_PCIE_ECRC_CHECK_FAILED: + case PQI_DATA_IN_OUT_PCIE_UNSUPPORTED_REQUEST: + case PQI_DATA_IN_OUT_PCIE_ACS_VIOLATION: + case PQI_DATA_IN_OUT_PCIE_TLP_PREFIX_BLOCKED: + case PQI_DATA_IN_OUT_PCIE_POISONED_MEMORY_READ: + ciss_cmd_status = CISS_CMD_STATUS_HARDWARE_ERROR; + break; + case PQI_DATA_IN_OUT_UNSOLICITED_ABORT: + ciss_cmd_status = CISS_CMD_STATUS_UNSOLICITED_ABORT; + break; + case PQI_DATA_IN_OUT_ABORTED: + ciss_cmd_status = CISS_CMD_STATUS_ABORTED; + break; + case PQI_DATA_IN_OUT_TIMEOUT: + ciss_cmd_status = CISS_CMD_STATUS_TIMEOUT; + break; + default: + ciss_cmd_status = CISS_CMD_STATUS_TARGET_STATUS; + break; + } + + sense_data_length = + get_unaligned_le16(&pqi_error_info->sense_data_length); + if (sense_data_length == 0) + sense_data_length = + get_unaligned_le16(&pqi_error_info->response_data_length); + if (sense_data_length) + if (sense_data_length > sizeof(pqi_error_info->data)) + sense_data_length = sizeof(pqi_error_info->data); + + ciss_error_info->scsi_status = pqi_error_info->status; + ciss_error_info->command_status = ciss_cmd_status; + ciss_error_info->sense_data_length = sense_data_length; +} + +static int pqi_passthru_ioctl(struct pqi_ctrl_info *ctrl_info, void __user *arg) +{ + int rc; + char *kernel_buffer = NULL; + u16 iu_length; + size_t sense_data_length; + IOCTL_Command_struct iocommand; + struct pqi_raid_path_request request; + struct pqi_raid_error_info pqi_error_info; + struct ciss_error_info ciss_error_info; + + if (pqi_ctrl_offline(ctrl_info)) + return -ENXIO; + if (!arg) + return -EINVAL; + if (!capable(CAP_SYS_RAWIO)) + return -EPERM; + if (copy_from_user(&iocommand, arg, sizeof(iocommand))) + return -EFAULT; + if (iocommand.buf_size < 1 && + iocommand.Request.Type.Direction != XFER_NONE) + return -EINVAL; + if (iocommand.Request.CDBLen > sizeof(request.cdb)) + return -EINVAL; + if (iocommand.Request.Type.Type != TYPE_CMD) + return -EINVAL; + + switch (iocommand.Request.Type.Direction) { + case XFER_NONE: + case XFER_WRITE: + case XFER_READ: + case XFER_READ | XFER_WRITE: + break; + default: + return -EINVAL; + } + + if (iocommand.buf_size > 0) { + kernel_buffer = kmalloc(iocommand.buf_size, GFP_KERNEL); + if (!kernel_buffer) + return -ENOMEM; + if (iocommand.Request.Type.Direction & XFER_WRITE) { + if (copy_from_user(kernel_buffer, iocommand.buf, + iocommand.buf_size)) { + rc = -EFAULT; + goto out; + } + } else { + memset(kernel_buffer, 0, iocommand.buf_size); + } + } + + memset(&request, 0, sizeof(request)); + + request.header.iu_type = PQI_REQUEST_IU_RAID_PATH_IO; + iu_length = offsetof(struct pqi_raid_path_request, sg_descriptors) - + PQI_REQUEST_HEADER_LENGTH; + memcpy(request.lun_number, iocommand.LUN_info.LunAddrBytes, + sizeof(request.lun_number)); + memcpy(request.cdb, iocommand.Request.CDB, iocommand.Request.CDBLen); + request.additional_cdb_bytes_usage = SOP_ADDITIONAL_CDB_BYTES_0; + + switch (iocommand.Request.Type.Direction) { + case XFER_NONE: + request.data_direction = SOP_NO_DIRECTION_FLAG; + break; + case XFER_WRITE: + request.data_direction = SOP_WRITE_FLAG; + break; + case XFER_READ: + request.data_direction = SOP_READ_FLAG; + break; + case XFER_READ | XFER_WRITE: + request.data_direction = SOP_BIDIRECTIONAL; + break; + } + + request.task_attribute = SOP_TASK_ATTRIBUTE_SIMPLE; + + if (iocommand.buf_size > 0) { + put_unaligned_le32(iocommand.buf_size, &request.buffer_length); + + rc = pqi_map_single(ctrl_info->pci_dev, + &request.sg_descriptors[0], kernel_buffer, + iocommand.buf_size, DMA_BIDIRECTIONAL); + if (rc) + goto out; + + iu_length += sizeof(request.sg_descriptors[0]); + } + + put_unaligned_le16(iu_length, &request.header.iu_length); + + if (ctrl_info->raid_iu_timeout_supported) + put_unaligned_le32(iocommand.Request.Timeout, &request.timeout); + + rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header, + PQI_SYNC_FLAGS_INTERRUPTABLE, &pqi_error_info, NO_TIMEOUT); + + if (iocommand.buf_size > 0) + pqi_pci_unmap(ctrl_info->pci_dev, request.sg_descriptors, 1, + DMA_BIDIRECTIONAL); + + memset(&iocommand.error_info, 0, sizeof(iocommand.error_info)); + + if (rc == 0) { + pqi_error_info_to_ciss(&pqi_error_info, &ciss_error_info); + iocommand.error_info.ScsiStatus = ciss_error_info.scsi_status; + iocommand.error_info.CommandStatus = + ciss_error_info.command_status; + sense_data_length = ciss_error_info.sense_data_length; + if (sense_data_length) { + if (sense_data_length > + sizeof(iocommand.error_info.SenseInfo)) + sense_data_length = + sizeof(iocommand.error_info.SenseInfo); + memcpy(iocommand.error_info.SenseInfo, + pqi_error_info.data, sense_data_length); + iocommand.error_info.SenseLen = sense_data_length; + } + } + + if (copy_to_user(arg, &iocommand, sizeof(iocommand))) { + rc = -EFAULT; + goto out; + } + + if (rc == 0 && iocommand.buf_size > 0 && + (iocommand.Request.Type.Direction & XFER_READ)) { + if (copy_to_user(iocommand.buf, kernel_buffer, + iocommand.buf_size)) { + rc = -EFAULT; + } + } + +out: + kfree(kernel_buffer); + + return rc; +} + +static int pqi_ioctl(struct scsi_device *sdev, unsigned int cmd, + void __user *arg) +{ + int rc; + struct pqi_ctrl_info *ctrl_info; + + ctrl_info = shost_to_hba(sdev->host); + + if (pqi_ctrl_in_ofa(ctrl_info) || pqi_ctrl_in_shutdown(ctrl_info)) + return -EBUSY; + + switch (cmd) { + case CCISS_DEREGDISK: + case CCISS_REGNEWDISK: + case CCISS_REGNEWD: + rc = pqi_scan_scsi_devices(ctrl_info); + break; + case CCISS_GETPCIINFO: + rc = pqi_getpciinfo_ioctl(ctrl_info, arg); + break; + case CCISS_GETDRIVVER: + rc = pqi_getdrivver_ioctl(arg); + break; + case CCISS_PASSTHRU: + rc = pqi_passthru_ioctl(ctrl_info, arg); + break; + default: + rc = -EINVAL; + break; + } + + return rc; +} + +static ssize_t pqi_firmware_version_show(struct device *dev, + struct device_attribute *attr, char *buffer) +{ + struct Scsi_Host *shost; + struct pqi_ctrl_info *ctrl_info; + + shost = class_to_shost(dev); + ctrl_info = shost_to_hba(shost); + + return snprintf(buffer, PAGE_SIZE, "%s\n", ctrl_info->firmware_version); +} + +static ssize_t pqi_driver_version_show(struct device *dev, + struct device_attribute *attr, char *buffer) +{ + return snprintf(buffer, PAGE_SIZE, "%s\n", + DRIVER_VERSION BUILD_TIMESTAMP); +} + +static ssize_t pqi_serial_number_show(struct device *dev, + struct device_attribute *attr, char *buffer) +{ + struct Scsi_Host *shost; + struct pqi_ctrl_info *ctrl_info; + + shost = class_to_shost(dev); + ctrl_info = shost_to_hba(shost); + + return snprintf(buffer, PAGE_SIZE, "%s\n", ctrl_info->serial_number); +} + +static ssize_t pqi_model_show(struct device *dev, + struct device_attribute *attr, char *buffer) +{ + struct Scsi_Host *shost; + struct pqi_ctrl_info *ctrl_info; + + shost = class_to_shost(dev); + ctrl_info = shost_to_hba(shost); + + return snprintf(buffer, PAGE_SIZE, "%s\n", ctrl_info->model); +} + +static ssize_t pqi_vendor_show(struct device *dev, + struct device_attribute *attr, char *buffer) +{ + struct Scsi_Host *shost; + struct pqi_ctrl_info *ctrl_info; + + shost = class_to_shost(dev); + ctrl_info = shost_to_hba(shost); + + return snprintf(buffer, PAGE_SIZE, "%s\n", ctrl_info->vendor); +} + +static ssize_t pqi_host_rescan_store(struct device *dev, + struct device_attribute *attr, const char *buffer, size_t count) +{ + struct Scsi_Host *shost = class_to_shost(dev); + + pqi_scan_start(shost); + + return count; +} + +static ssize_t pqi_lockup_action_show(struct device *dev, + struct device_attribute *attr, char *buffer) +{ + int count = 0; + unsigned int i; + + for (i = 0; i < ARRAY_SIZE(pqi_lockup_actions); i++) { + if (pqi_lockup_actions[i].action == pqi_lockup_action) + count += scnprintf(buffer + count, PAGE_SIZE - count, + "[%s] ", pqi_lockup_actions[i].name); + else + count += scnprintf(buffer + count, PAGE_SIZE - count, + "%s ", pqi_lockup_actions[i].name); + } + + count += scnprintf(buffer + count, PAGE_SIZE - count, "\n"); + + return count; +} + +static ssize_t pqi_lockup_action_store(struct device *dev, + struct device_attribute *attr, const char *buffer, size_t count) +{ + unsigned int i; + char *action_name; + char action_name_buffer[32]; + + strlcpy(action_name_buffer, buffer, sizeof(action_name_buffer)); + action_name = strstrip(action_name_buffer); + + for (i = 0; i < ARRAY_SIZE(pqi_lockup_actions); i++) { + if (strcmp(action_name, pqi_lockup_actions[i].name) == 0) { + pqi_lockup_action = pqi_lockup_actions[i].action; + return count; + } + } + + return -EINVAL; +} + +static DEVICE_ATTR(driver_version, 0444, pqi_driver_version_show, NULL); +static DEVICE_ATTR(firmware_version, 0444, pqi_firmware_version_show, NULL); +static DEVICE_ATTR(model, 0444, pqi_model_show, NULL); +static DEVICE_ATTR(serial_number, 0444, pqi_serial_number_show, NULL); +static DEVICE_ATTR(vendor, 0444, pqi_vendor_show, NULL); +static DEVICE_ATTR(rescan, 0200, NULL, pqi_host_rescan_store); +static DEVICE_ATTR(lockup_action, 0644, + pqi_lockup_action_show, pqi_lockup_action_store); + +static struct device_attribute *pqi_shost_attrs[] = { + &dev_attr_driver_version, + &dev_attr_firmware_version, + &dev_attr_model, + &dev_attr_serial_number, + &dev_attr_vendor, + &dev_attr_rescan, + &dev_attr_lockup_action, + NULL +}; + +static ssize_t pqi_unique_id_show(struct device *dev, + struct device_attribute *attr, char *buffer) +{ + struct pqi_ctrl_info *ctrl_info; + struct scsi_device *sdev; + struct pqi_scsi_dev *device; + unsigned long flags; + u8 unique_id[16]; + + sdev = to_scsi_device(dev); + ctrl_info = shost_to_hba(sdev->host); + + spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags); + + device = sdev->hostdata; + if (!device) { + spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags); + return -ENODEV; + } + + if (device->is_physical_device) { + memset(unique_id, 0, 8); + memcpy(unique_id + 8, &device->wwid, sizeof(device->wwid)); + } else { + memcpy(unique_id, device->volume_id, sizeof(device->volume_id)); + } + + spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags); + + return snprintf(buffer, PAGE_SIZE, + "%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X%02X\n", + unique_id[0], unique_id[1], unique_id[2], unique_id[3], + unique_id[4], unique_id[5], unique_id[6], unique_id[7], + unique_id[8], unique_id[9], unique_id[10], unique_id[11], + unique_id[12], unique_id[13], unique_id[14], unique_id[15]); +} + +static ssize_t pqi_lunid_show(struct device *dev, + struct device_attribute *attr, char *buffer) +{ + struct pqi_ctrl_info *ctrl_info; + struct scsi_device *sdev; + struct pqi_scsi_dev *device; + unsigned long flags; + u8 lunid[8]; + + sdev = to_scsi_device(dev); + ctrl_info = shost_to_hba(sdev->host); + + spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags); + + device = sdev->hostdata; + if (!device) { + spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags); + return -ENODEV; + } + + memcpy(lunid, device->scsi3addr, sizeof(lunid)); + + spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags); + + return snprintf(buffer, PAGE_SIZE, "0x%8phN\n", lunid); +} + +#define MAX_PATHS 8 + +static ssize_t pqi_path_info_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct pqi_ctrl_info *ctrl_info; + struct scsi_device *sdev; + struct pqi_scsi_dev *device; + unsigned long flags; + int i; + int output_len = 0; + u8 box; + u8 bay; + u8 path_map_index; + char *active; + u8 phys_connector[2]; + + sdev = to_scsi_device(dev); + ctrl_info = shost_to_hba(sdev->host); + + spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags); + + device = sdev->hostdata; + if (!device) { + spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags); + return -ENODEV; + } + + bay = device->bay; + for (i = 0; i < MAX_PATHS; i++) { + path_map_index = 1 << i; + if (i == device->active_path_index) + active = "Active"; + else if (device->path_map & path_map_index) + active = "Inactive"; + else + continue; + + output_len += scnprintf(buf + output_len, + PAGE_SIZE - output_len, + "[%d:%d:%d:%d] %20.20s ", + ctrl_info->scsi_host->host_no, + device->bus, device->target, + device->lun, + scsi_device_type(device->devtype)); + + if (device->devtype == TYPE_RAID || + pqi_is_logical_device(device)) + goto end_buffer; + + memcpy(&phys_connector, &device->phys_connector[i], + sizeof(phys_connector)); + if (phys_connector[0] < '0') + phys_connector[0] = '0'; + if (phys_connector[1] < '0') + phys_connector[1] = '0'; + + output_len += scnprintf(buf + output_len, + PAGE_SIZE - output_len, + "PORT: %.2s ", phys_connector); + + box = device->box[i]; + if (box != 0 && box != 0xFF) + output_len += scnprintf(buf + output_len, + PAGE_SIZE - output_len, + "BOX: %hhu ", box); + + if ((device->devtype == TYPE_DISK || + device->devtype == TYPE_ZBC) && + pqi_expose_device(device)) + output_len += scnprintf(buf + output_len, + PAGE_SIZE - output_len, + "BAY: %hhu ", bay); + +end_buffer: + output_len += scnprintf(buf + output_len, + PAGE_SIZE - output_len, + "%s\n", active); + } + + spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags); + + return output_len; +} + +static ssize_t pqi_sas_address_show(struct device *dev, + struct device_attribute *attr, char *buffer) +{ + struct pqi_ctrl_info *ctrl_info; + struct scsi_device *sdev; + struct pqi_scsi_dev *device; + unsigned long flags; + u64 sas_address; + + sdev = to_scsi_device(dev); + ctrl_info = shost_to_hba(sdev->host); + + spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags); + + device = sdev->hostdata; + if (!device || !pqi_is_device_with_sas_address(device)) { + spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags); + return -ENODEV; + } + + sas_address = device->sas_address; + + spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags); + + return snprintf(buffer, PAGE_SIZE, "0x%016llx\n", sas_address); +} + +static ssize_t pqi_ssd_smart_path_enabled_show(struct device *dev, + struct device_attribute *attr, char *buffer) +{ + struct pqi_ctrl_info *ctrl_info; + struct scsi_device *sdev; + struct pqi_scsi_dev *device; + unsigned long flags; + + sdev = to_scsi_device(dev); + ctrl_info = shost_to_hba(sdev->host); + + spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags); + + device = sdev->hostdata; + if (!device) { + spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags); + return -ENODEV; + } + + buffer[0] = device->raid_bypass_enabled ? '1' : '0'; + buffer[1] = '\n'; + buffer[2] = '\0'; + + spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags); + + return 2; +} + +static ssize_t pqi_raid_level_show(struct device *dev, + struct device_attribute *attr, char *buffer) +{ + struct pqi_ctrl_info *ctrl_info; + struct scsi_device *sdev; + struct pqi_scsi_dev *device; + unsigned long flags; + char *raid_level; + + sdev = to_scsi_device(dev); + ctrl_info = shost_to_hba(sdev->host); + + spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags); + + device = sdev->hostdata; + if (!device) { + spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags); + return -ENODEV; + } + + if (pqi_is_logical_device(device)) + raid_level = pqi_raid_level_to_string(device->raid_level); + else + raid_level = "N/A"; + + spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags); + + return snprintf(buffer, PAGE_SIZE, "%s\n", raid_level); +} + +static ssize_t pqi_raid_bypass_cnt_show(struct device *dev, + struct device_attribute *attr, char *buffer) +{ + struct pqi_ctrl_info *ctrl_info; + struct scsi_device *sdev; + struct pqi_scsi_dev *device; + unsigned long flags; + int raid_bypass_cnt; + + sdev = to_scsi_device(dev); + ctrl_info = shost_to_hba(sdev->host); + + spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags); + + device = sdev->hostdata; + if (!device) { + spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags); + return -ENODEV; + } + + raid_bypass_cnt = atomic_read(&device->raid_bypass_cnt); + + spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags); + + return snprintf(buffer, PAGE_SIZE, "0x%x\n", raid_bypass_cnt); +} + +static DEVICE_ATTR(lunid, 0444, pqi_lunid_show, NULL); +static DEVICE_ATTR(unique_id, 0444, pqi_unique_id_show, NULL); +static DEVICE_ATTR(path_info, 0444, pqi_path_info_show, NULL); +static DEVICE_ATTR(sas_address, 0444, pqi_sas_address_show, NULL); +static DEVICE_ATTR(ssd_smart_path_enabled, 0444, pqi_ssd_smart_path_enabled_show, NULL); +static DEVICE_ATTR(raid_level, 0444, pqi_raid_level_show, NULL); +static DEVICE_ATTR(raid_bypass_cnt, 0444, pqi_raid_bypass_cnt_show, NULL); + +static struct device_attribute *pqi_sdev_attrs[] = { + &dev_attr_lunid, + &dev_attr_unique_id, + &dev_attr_path_info, + &dev_attr_sas_address, + &dev_attr_ssd_smart_path_enabled, + &dev_attr_raid_level, + &dev_attr_raid_bypass_cnt, + NULL +}; + +static struct scsi_host_template pqi_driver_template = { + .module = THIS_MODULE, + .name = DRIVER_NAME_SHORT, + .proc_name = DRIVER_NAME_SHORT, + .queuecommand = pqi_scsi_queue_command, + .scan_start = pqi_scan_start, + .scan_finished = pqi_scan_finished, + .this_id = -1, + .eh_device_reset_handler = pqi_eh_device_reset_handler, + .ioctl = pqi_ioctl, + .slave_alloc = pqi_slave_alloc, + .slave_configure = pqi_slave_configure, + .slave_destroy = pqi_slave_destroy, + .map_queues = pqi_map_queues, + .sdev_attrs = pqi_sdev_attrs, + .shost_attrs = pqi_shost_attrs, +}; + +static int pqi_register_scsi(struct pqi_ctrl_info *ctrl_info) +{ + int rc; + struct Scsi_Host *shost; + + shost = scsi_host_alloc(&pqi_driver_template, sizeof(ctrl_info)); + if (!shost) { + dev_err(&ctrl_info->pci_dev->dev, + "scsi_host_alloc failed for controller %u\n", + ctrl_info->ctrl_id); + return -ENOMEM; + } + + shost->io_port = 0; + shost->n_io_port = 0; + shost->this_id = -1; + shost->max_channel = PQI_MAX_BUS; + shost->max_cmd_len = MAX_COMMAND_SIZE; + shost->max_lun = ~0; + shost->max_id = ~0; + shost->max_sectors = ctrl_info->max_sectors; + shost->can_queue = ctrl_info->scsi_ml_can_queue; + shost->cmd_per_lun = shost->can_queue; + shost->sg_tablesize = ctrl_info->sg_tablesize; + shost->transportt = pqi_sas_transport_template; + shost->irq = pci_irq_vector(ctrl_info->pci_dev, 0); + shost->unique_id = shost->irq; + shost->nr_hw_queues = ctrl_info->num_queue_groups; + shost->host_tagset = 1; + shost->hostdata[0] = (unsigned long)ctrl_info; + + rc = scsi_add_host(shost, &ctrl_info->pci_dev->dev); + if (rc) { + dev_err(&ctrl_info->pci_dev->dev, + "scsi_add_host failed for controller %u\n", + ctrl_info->ctrl_id); + goto free_host; + } + + rc = pqi_add_sas_host(shost, ctrl_info); + if (rc) { + dev_err(&ctrl_info->pci_dev->dev, + "add SAS host failed for controller %u\n", + ctrl_info->ctrl_id); + goto remove_host; + } + + ctrl_info->scsi_host = shost; + + return 0; + +remove_host: + scsi_remove_host(shost); +free_host: + scsi_host_put(shost); + + return rc; +} + +static void pqi_unregister_scsi(struct pqi_ctrl_info *ctrl_info) +{ + struct Scsi_Host *shost; + + pqi_delete_sas_host(ctrl_info); + + shost = ctrl_info->scsi_host; + if (!shost) + return; + + scsi_remove_host(shost); + scsi_host_put(shost); +} + +static int pqi_wait_for_pqi_reset_completion(struct pqi_ctrl_info *ctrl_info) +{ + int rc = 0; + struct pqi_device_registers __iomem *pqi_registers; + unsigned long timeout; + unsigned int timeout_msecs; + union pqi_reset_register reset_reg; + + pqi_registers = ctrl_info->pqi_registers; + timeout_msecs = readw(&pqi_registers->max_reset_timeout) * 100; + timeout = msecs_to_jiffies(timeout_msecs) + jiffies; + + while (1) { + msleep(PQI_RESET_POLL_INTERVAL_MSECS); + reset_reg.all_bits = readl(&pqi_registers->device_reset); + if (reset_reg.bits.reset_action == PQI_RESET_ACTION_COMPLETED) + break; + pqi_check_ctrl_health(ctrl_info); + if (pqi_ctrl_offline(ctrl_info)) { + rc = -ENXIO; + break; + } + if (time_after(jiffies, timeout)) { + rc = -ETIMEDOUT; + break; + } + } + + return rc; +} + +static int pqi_reset(struct pqi_ctrl_info *ctrl_info) +{ + int rc; + union pqi_reset_register reset_reg; + + if (ctrl_info->pqi_reset_quiesce_supported) { + rc = sis_pqi_reset_quiesce(ctrl_info); + if (rc) { + dev_err(&ctrl_info->pci_dev->dev, + "PQI reset failed during quiesce with error %d\n", + rc); + return rc; + } + } + + reset_reg.all_bits = 0; + reset_reg.bits.reset_type = PQI_RESET_TYPE_HARD_RESET; + reset_reg.bits.reset_action = PQI_RESET_ACTION_RESET; + + writel(reset_reg.all_bits, &ctrl_info->pqi_registers->device_reset); + + rc = pqi_wait_for_pqi_reset_completion(ctrl_info); + if (rc) + dev_err(&ctrl_info->pci_dev->dev, + "PQI reset failed with error %d\n", rc); + + return rc; +} + +static int pqi_get_ctrl_serial_number(struct pqi_ctrl_info *ctrl_info) +{ + int rc; + struct bmic_sense_subsystem_info *sense_info; + + sense_info = kzalloc(sizeof(*sense_info), GFP_KERNEL); + if (!sense_info) + return -ENOMEM; + + rc = pqi_sense_subsystem_info(ctrl_info, sense_info); + if (rc) + goto out; + + memcpy(ctrl_info->serial_number, sense_info->ctrl_serial_number, + sizeof(sense_info->ctrl_serial_number)); + ctrl_info->serial_number[sizeof(sense_info->ctrl_serial_number)] = '\0'; + +out: + kfree(sense_info); + + return rc; +} + +static int pqi_get_ctrl_product_details(struct pqi_ctrl_info *ctrl_info) +{ + int rc; + struct bmic_identify_controller *identify; + + identify = kmalloc(sizeof(*identify), GFP_KERNEL); + if (!identify) + return -ENOMEM; + + rc = pqi_identify_controller(ctrl_info, identify); + if (rc) + goto out; + + memcpy(ctrl_info->firmware_version, identify->firmware_version, + sizeof(identify->firmware_version)); + ctrl_info->firmware_version[sizeof(identify->firmware_version)] = '\0'; + snprintf(ctrl_info->firmware_version + + strlen(ctrl_info->firmware_version), + sizeof(ctrl_info->firmware_version), + "-%u", get_unaligned_le16(&identify->firmware_build_number)); + + memcpy(ctrl_info->model, identify->product_id, + sizeof(identify->product_id)); + ctrl_info->model[sizeof(identify->product_id)] = '\0'; + + memcpy(ctrl_info->vendor, identify->vendor_id, + sizeof(identify->vendor_id)); + ctrl_info->vendor[sizeof(identify->vendor_id)] = '\0'; + +out: + kfree(identify); + + return rc; +} + +struct pqi_config_table_section_info { + struct pqi_ctrl_info *ctrl_info; + void *section; + u32 section_offset; + void __iomem *section_iomem_addr; +}; + +static inline bool pqi_is_firmware_feature_supported( + struct pqi_config_table_firmware_features *firmware_features, + unsigned int bit_position) +{ + unsigned int byte_index; + + byte_index = bit_position / BITS_PER_BYTE; + + if (byte_index >= le16_to_cpu(firmware_features->num_elements)) + return false; + + return firmware_features->features_supported[byte_index] & + (1 << (bit_position % BITS_PER_BYTE)) ? true : false; +} + +static inline bool pqi_is_firmware_feature_enabled( + struct pqi_config_table_firmware_features *firmware_features, + void __iomem *firmware_features_iomem_addr, + unsigned int bit_position) +{ + unsigned int byte_index; + u8 __iomem *features_enabled_iomem_addr; + + byte_index = (bit_position / BITS_PER_BYTE) + + (le16_to_cpu(firmware_features->num_elements) * 2); + + features_enabled_iomem_addr = firmware_features_iomem_addr + + offsetof(struct pqi_config_table_firmware_features, + features_supported) + byte_index; + + return *((__force u8 *)features_enabled_iomem_addr) & + (1 << (bit_position % BITS_PER_BYTE)) ? true : false; +} + +static inline void pqi_request_firmware_feature( + struct pqi_config_table_firmware_features *firmware_features, + unsigned int bit_position) +{ + unsigned int byte_index; + + byte_index = (bit_position / BITS_PER_BYTE) + + le16_to_cpu(firmware_features->num_elements); + + firmware_features->features_supported[byte_index] |= + (1 << (bit_position % BITS_PER_BYTE)); +} + +static int pqi_config_table_update(struct pqi_ctrl_info *ctrl_info, + u16 first_section, u16 last_section) +{ + struct pqi_vendor_general_request request; + + memset(&request, 0, sizeof(request)); + + request.header.iu_type = PQI_REQUEST_IU_VENDOR_GENERAL; + put_unaligned_le16(sizeof(request) - PQI_REQUEST_HEADER_LENGTH, + &request.header.iu_length); + put_unaligned_le16(PQI_VENDOR_GENERAL_CONFIG_TABLE_UPDATE, + &request.function_code); + put_unaligned_le16(first_section, + &request.data.config_table_update.first_section); + put_unaligned_le16(last_section, + &request.data.config_table_update.last_section); + + return pqi_submit_raid_request_synchronous(ctrl_info, &request.header, + 0, NULL, NO_TIMEOUT); +} + +static int pqi_enable_firmware_features(struct pqi_ctrl_info *ctrl_info, + struct pqi_config_table_firmware_features *firmware_features, + void __iomem *firmware_features_iomem_addr) +{ + void *features_requested; + void __iomem *features_requested_iomem_addr; + + features_requested = firmware_features->features_supported + + le16_to_cpu(firmware_features->num_elements); + + features_requested_iomem_addr = firmware_features_iomem_addr + + (features_requested - (void *)firmware_features); + + memcpy_toio(features_requested_iomem_addr, features_requested, + le16_to_cpu(firmware_features->num_elements)); + + return pqi_config_table_update(ctrl_info, + PQI_CONFIG_TABLE_SECTION_FIRMWARE_FEATURES, + PQI_CONFIG_TABLE_SECTION_FIRMWARE_FEATURES); +} + +struct pqi_firmware_feature { + char *feature_name; + unsigned int feature_bit; + bool supported; + bool enabled; + void (*feature_status)(struct pqi_ctrl_info *ctrl_info, + struct pqi_firmware_feature *firmware_feature); +}; + +static void pqi_firmware_feature_status(struct pqi_ctrl_info *ctrl_info, + struct pqi_firmware_feature *firmware_feature) +{ + if (!firmware_feature->supported) { + dev_info(&ctrl_info->pci_dev->dev, "%s not supported by controller\n", + firmware_feature->feature_name); + return; + } + + if (firmware_feature->enabled) { + dev_info(&ctrl_info->pci_dev->dev, + "%s enabled\n", firmware_feature->feature_name); + return; + } + + dev_err(&ctrl_info->pci_dev->dev, "failed to enable %s\n", + firmware_feature->feature_name); +} + +static void pqi_ctrl_update_feature_flags(struct pqi_ctrl_info *ctrl_info, + struct pqi_firmware_feature *firmware_feature) +{ + switch (firmware_feature->feature_bit) { + case PQI_FIRMWARE_FEATURE_SOFT_RESET_HANDSHAKE: + ctrl_info->soft_reset_handshake_supported = + firmware_feature->enabled; + break; + case PQI_FIRMWARE_FEATURE_RAID_IU_TIMEOUT: + ctrl_info->raid_iu_timeout_supported = + firmware_feature->enabled; + break; + case PQI_FIRMWARE_FEATURE_TMF_IU_TIMEOUT: + ctrl_info->tmf_iu_timeout_supported = + firmware_feature->enabled; + break; + } + + pqi_firmware_feature_status(ctrl_info, firmware_feature); +} + +static inline void pqi_firmware_feature_update(struct pqi_ctrl_info *ctrl_info, + struct pqi_firmware_feature *firmware_feature) +{ + if (firmware_feature->feature_status) + firmware_feature->feature_status(ctrl_info, firmware_feature); +} + +static DEFINE_MUTEX(pqi_firmware_features_mutex); + +static struct pqi_firmware_feature pqi_firmware_features[] = { + { + .feature_name = "Online Firmware Activation", + .feature_bit = PQI_FIRMWARE_FEATURE_OFA, + .feature_status = pqi_firmware_feature_status, + }, + { + .feature_name = "Serial Management Protocol", + .feature_bit = PQI_FIRMWARE_FEATURE_SMP, + .feature_status = pqi_firmware_feature_status, + }, + { + .feature_name = "New Soft Reset Handshake", + .feature_bit = PQI_FIRMWARE_FEATURE_SOFT_RESET_HANDSHAKE, + .feature_status = pqi_ctrl_update_feature_flags, + }, + { + .feature_name = "RAID IU Timeout", + .feature_bit = PQI_FIRMWARE_FEATURE_RAID_IU_TIMEOUT, + .feature_status = pqi_ctrl_update_feature_flags, + }, + { + .feature_name = "TMF IU Timeout", + .feature_bit = PQI_FIRMWARE_FEATURE_TMF_IU_TIMEOUT, + .feature_status = pqi_ctrl_update_feature_flags, + }, +}; + +static void pqi_process_firmware_features( + struct pqi_config_table_section_info *section_info) +{ + int rc; + struct pqi_ctrl_info *ctrl_info; + struct pqi_config_table_firmware_features *firmware_features; + void __iomem *firmware_features_iomem_addr; + unsigned int i; + unsigned int num_features_supported; + + ctrl_info = section_info->ctrl_info; + firmware_features = section_info->section; + firmware_features_iomem_addr = section_info->section_iomem_addr; + + for (i = 0, num_features_supported = 0; + i < ARRAY_SIZE(pqi_firmware_features); i++) { + if (pqi_is_firmware_feature_supported(firmware_features, + pqi_firmware_features[i].feature_bit)) { + pqi_firmware_features[i].supported = true; + num_features_supported++; + } else { + pqi_firmware_feature_update(ctrl_info, + &pqi_firmware_features[i]); + } + } + + if (num_features_supported == 0) + return; + + for (i = 0; i < ARRAY_SIZE(pqi_firmware_features); i++) { + if (!pqi_firmware_features[i].supported) + continue; + pqi_request_firmware_feature(firmware_features, + pqi_firmware_features[i].feature_bit); + } + + rc = pqi_enable_firmware_features(ctrl_info, firmware_features, + firmware_features_iomem_addr); + if (rc) { + dev_err(&ctrl_info->pci_dev->dev, + "failed to enable firmware features in PQI configuration table\n"); + for (i = 0; i < ARRAY_SIZE(pqi_firmware_features); i++) { + if (!pqi_firmware_features[i].supported) + continue; + pqi_firmware_feature_update(ctrl_info, + &pqi_firmware_features[i]); + } + return; + } + + for (i = 0; i < ARRAY_SIZE(pqi_firmware_features); i++) { + if (!pqi_firmware_features[i].supported) + continue; + if (pqi_is_firmware_feature_enabled(firmware_features, + firmware_features_iomem_addr, + pqi_firmware_features[i].feature_bit)) { + pqi_firmware_features[i].enabled = true; + } + pqi_firmware_feature_update(ctrl_info, + &pqi_firmware_features[i]); + } +} + +static void pqi_init_firmware_features(void) +{ + unsigned int i; + + for (i = 0; i < ARRAY_SIZE(pqi_firmware_features); i++) { + pqi_firmware_features[i].supported = false; + pqi_firmware_features[i].enabled = false; + } +} + +static void pqi_process_firmware_features_section( + struct pqi_config_table_section_info *section_info) +{ + mutex_lock(&pqi_firmware_features_mutex); + pqi_init_firmware_features(); + pqi_process_firmware_features(section_info); + mutex_unlock(&pqi_firmware_features_mutex); +} + +static int pqi_process_config_table(struct pqi_ctrl_info *ctrl_info) +{ + u32 table_length; + u32 section_offset; + void __iomem *table_iomem_addr; + struct pqi_config_table *config_table; + struct pqi_config_table_section_header *section; + struct pqi_config_table_section_info section_info; + + table_length = ctrl_info->config_table_length; + if (table_length == 0) + return 0; + + config_table = kmalloc(table_length, GFP_KERNEL); + if (!config_table) { + dev_err(&ctrl_info->pci_dev->dev, + "failed to allocate memory for PQI configuration table\n"); + return -ENOMEM; + } + + /* + * Copy the config table contents from I/O memory space into the + * temporary buffer. + */ + table_iomem_addr = ctrl_info->iomem_base + + ctrl_info->config_table_offset; + memcpy_fromio(config_table, table_iomem_addr, table_length); + + section_info.ctrl_info = ctrl_info; + section_offset = + get_unaligned_le32(&config_table->first_section_offset); + + while (section_offset) { + section = (void *)config_table + section_offset; + + section_info.section = section; + section_info.section_offset = section_offset; + section_info.section_iomem_addr = + table_iomem_addr + section_offset; + + switch (get_unaligned_le16(§ion->section_id)) { + case PQI_CONFIG_TABLE_SECTION_FIRMWARE_FEATURES: + pqi_process_firmware_features_section(§ion_info); + break; + case PQI_CONFIG_TABLE_SECTION_HEARTBEAT: + if (pqi_disable_heartbeat) + dev_warn(&ctrl_info->pci_dev->dev, + "heartbeat disabled by module parameter\n"); + else + ctrl_info->heartbeat_counter = + table_iomem_addr + + section_offset + + offsetof( + struct pqi_config_table_heartbeat, + heartbeat_counter); + break; + case PQI_CONFIG_TABLE_SECTION_SOFT_RESET: + ctrl_info->soft_reset_status = + table_iomem_addr + + section_offset + + offsetof(struct pqi_config_table_soft_reset, + soft_reset_status); + break; + } + + section_offset = + get_unaligned_le16(§ion->next_section_offset); + } + + kfree(config_table); + + return 0; +} + +/* Switches the controller from PQI mode back into SIS mode. */ + +static int pqi_revert_to_sis_mode(struct pqi_ctrl_info *ctrl_info) +{ + int rc; + + pqi_change_irq_mode(ctrl_info, IRQ_MODE_NONE); + rc = pqi_reset(ctrl_info); + if (rc) + return rc; + rc = sis_reenable_sis_mode(ctrl_info); + if (rc) { + dev_err(&ctrl_info->pci_dev->dev, + "re-enabling SIS mode failed with error %d\n", rc); + return rc; + } + pqi_save_ctrl_mode(ctrl_info, SIS_MODE); + + return 0; +} + +/* + * If the controller isn't already in SIS mode, this function forces it into + * SIS mode. + */ + +static int pqi_force_sis_mode(struct pqi_ctrl_info *ctrl_info) +{ + if (!sis_is_firmware_running(ctrl_info)) + return -ENXIO; + + if (pqi_get_ctrl_mode(ctrl_info) == SIS_MODE) + return 0; + + if (sis_is_kernel_up(ctrl_info)) { + pqi_save_ctrl_mode(ctrl_info, SIS_MODE); + return 0; + } + + return pqi_revert_to_sis_mode(ctrl_info); +} + +#define PQI_POST_RESET_DELAY_B4_MSGU_READY 5000 + +static int pqi_ctrl_init(struct pqi_ctrl_info *ctrl_info) +{ + int rc; + + if (reset_devices) { + sis_soft_reset(ctrl_info); + msleep(PQI_POST_RESET_DELAY_B4_MSGU_READY); + } else { + rc = pqi_force_sis_mode(ctrl_info); + if (rc) + return rc; + } + + /* + * Wait until the controller is ready to start accepting SIS + * commands. + */ + rc = sis_wait_for_ctrl_ready(ctrl_info); + if (rc) + return rc; + + /* + * Get the controller properties. This allows us to determine + * whether or not it supports PQI mode. + */ + rc = sis_get_ctrl_properties(ctrl_info); + if (rc) { + dev_err(&ctrl_info->pci_dev->dev, + "error obtaining controller properties\n"); + return rc; + } + + rc = sis_get_pqi_capabilities(ctrl_info); + if (rc) { + dev_err(&ctrl_info->pci_dev->dev, + "error obtaining controller capabilities\n"); + return rc; + } + + if (reset_devices) { + if (ctrl_info->max_outstanding_requests > + PQI_MAX_OUTSTANDING_REQUESTS_KDUMP) + ctrl_info->max_outstanding_requests = + PQI_MAX_OUTSTANDING_REQUESTS_KDUMP; + } else { + if (ctrl_info->max_outstanding_requests > + PQI_MAX_OUTSTANDING_REQUESTS) + ctrl_info->max_outstanding_requests = + PQI_MAX_OUTSTANDING_REQUESTS; + } + + pqi_calculate_io_resources(ctrl_info); + + rc = pqi_alloc_error_buffer(ctrl_info); + if (rc) { + dev_err(&ctrl_info->pci_dev->dev, + "failed to allocate PQI error buffer\n"); + return rc; + } + + /* + * If the function we are about to call succeeds, the + * controller will transition from legacy SIS mode + * into PQI mode. + */ + rc = sis_init_base_struct_addr(ctrl_info); + if (rc) { + dev_err(&ctrl_info->pci_dev->dev, + "error initializing PQI mode\n"); + return rc; + } + + /* Wait for the controller to complete the SIS -> PQI transition. */ + rc = pqi_wait_for_pqi_mode_ready(ctrl_info); + if (rc) { + dev_err(&ctrl_info->pci_dev->dev, + "transition to PQI mode failed\n"); + return rc; + } + + /* From here on, we are running in PQI mode. */ + ctrl_info->pqi_mode_enabled = true; + pqi_save_ctrl_mode(ctrl_info, PQI_MODE); + + rc = pqi_alloc_admin_queues(ctrl_info); + if (rc) { + dev_err(&ctrl_info->pci_dev->dev, + "failed to allocate admin queues\n"); + return rc; + } + + rc = pqi_create_admin_queues(ctrl_info); + if (rc) { + dev_err(&ctrl_info->pci_dev->dev, + "error creating admin queues\n"); + return rc; + } + + rc = pqi_report_device_capability(ctrl_info); + if (rc) { + dev_err(&ctrl_info->pci_dev->dev, + "obtaining device capability failed\n"); + return rc; + } + + rc = pqi_validate_device_capability(ctrl_info); + if (rc) + return rc; + + pqi_calculate_queue_resources(ctrl_info); + + rc = pqi_enable_msix_interrupts(ctrl_info); + if (rc) + return rc; + + if (ctrl_info->num_msix_vectors_enabled < ctrl_info->num_queue_groups) { + ctrl_info->max_msix_vectors = + ctrl_info->num_msix_vectors_enabled; + pqi_calculate_queue_resources(ctrl_info); + } + + rc = pqi_alloc_io_resources(ctrl_info); + if (rc) + return rc; + + rc = pqi_alloc_operational_queues(ctrl_info); + if (rc) { + dev_err(&ctrl_info->pci_dev->dev, + "failed to allocate operational queues\n"); + return rc; + } + + pqi_init_operational_queues(ctrl_info); + + rc = pqi_request_irqs(ctrl_info); + if (rc) + return rc; + + rc = pqi_create_queues(ctrl_info); + if (rc) + return rc; + + pqi_change_irq_mode(ctrl_info, IRQ_MODE_MSIX); + + ctrl_info->controller_online = true; + + rc = pqi_process_config_table(ctrl_info); + if (rc) + return rc; + + pqi_start_heartbeat_timer(ctrl_info); + + rc = pqi_enable_events(ctrl_info); + if (rc) { + dev_err(&ctrl_info->pci_dev->dev, + "error enabling events\n"); + return rc; + } + + /* Register with the SCSI subsystem. */ + rc = pqi_register_scsi(ctrl_info); + if (rc) + return rc; + + rc = pqi_get_ctrl_product_details(ctrl_info); + if (rc) { + dev_err(&ctrl_info->pci_dev->dev, + "error obtaining product details\n"); + return rc; + } + + rc = pqi_get_ctrl_serial_number(ctrl_info); + if (rc) { + dev_err(&ctrl_info->pci_dev->dev, + "error obtaining ctrl serial number\n"); + return rc; + } + + rc = pqi_set_diag_rescan(ctrl_info); + if (rc) { + dev_err(&ctrl_info->pci_dev->dev, + "error enabling multi-lun rescan\n"); + return rc; + } + + rc = pqi_write_driver_version_to_host_wellness(ctrl_info); + if (rc) { + dev_err(&ctrl_info->pci_dev->dev, + "error updating host wellness\n"); + return rc; + } + + pqi_schedule_update_time_worker(ctrl_info); + + pqi_scan_scsi_devices(ctrl_info); + + return 0; +} + +static void pqi_reinit_queues(struct pqi_ctrl_info *ctrl_info) +{ + unsigned int i; + struct pqi_admin_queues *admin_queues; + struct pqi_event_queue *event_queue; + + admin_queues = &ctrl_info->admin_queues; + admin_queues->iq_pi_copy = 0; + admin_queues->oq_ci_copy = 0; + writel(0, admin_queues->oq_pi); + + for (i = 0; i < ctrl_info->num_queue_groups; i++) { + ctrl_info->queue_groups[i].iq_pi_copy[RAID_PATH] = 0; + ctrl_info->queue_groups[i].iq_pi_copy[AIO_PATH] = 0; + ctrl_info->queue_groups[i].oq_ci_copy = 0; + + writel(0, ctrl_info->queue_groups[i].iq_ci[RAID_PATH]); + writel(0, ctrl_info->queue_groups[i].iq_ci[AIO_PATH]); + writel(0, ctrl_info->queue_groups[i].oq_pi); + } + + event_queue = &ctrl_info->event_queue; + writel(0, event_queue->oq_pi); + event_queue->oq_ci_copy = 0; +} + +static int pqi_ctrl_init_resume(struct pqi_ctrl_info *ctrl_info) +{ + int rc; + + rc = pqi_force_sis_mode(ctrl_info); + if (rc) + return rc; + + /* + * Wait until the controller is ready to start accepting SIS + * commands. + */ + rc = sis_wait_for_ctrl_ready_resume(ctrl_info); + if (rc) + return rc; + + /* + * Get the controller properties. This allows us to determine + * whether or not it supports PQI mode. + */ + rc = sis_get_ctrl_properties(ctrl_info); + if (rc) { + dev_err(&ctrl_info->pci_dev->dev, + "error obtaining controller properties\n"); + return rc; + } + + rc = sis_get_pqi_capabilities(ctrl_info); + if (rc) { + dev_err(&ctrl_info->pci_dev->dev, + "error obtaining controller capabilities\n"); + return rc; + } + + /* + * If the function we are about to call succeeds, the + * controller will transition from legacy SIS mode + * into PQI mode. + */ + rc = sis_init_base_struct_addr(ctrl_info); + if (rc) { + dev_err(&ctrl_info->pci_dev->dev, + "error initializing PQI mode\n"); + return rc; + } + + /* Wait for the controller to complete the SIS -> PQI transition. */ + rc = pqi_wait_for_pqi_mode_ready(ctrl_info); + if (rc) { + dev_err(&ctrl_info->pci_dev->dev, + "transition to PQI mode failed\n"); + return rc; + } + + /* From here on, we are running in PQI mode. */ + ctrl_info->pqi_mode_enabled = true; + pqi_save_ctrl_mode(ctrl_info, PQI_MODE); + + pqi_reinit_queues(ctrl_info); + + rc = pqi_create_admin_queues(ctrl_info); + if (rc) { + dev_err(&ctrl_info->pci_dev->dev, + "error creating admin queues\n"); + return rc; + } + + rc = pqi_create_queues(ctrl_info); + if (rc) + return rc; + + pqi_change_irq_mode(ctrl_info, IRQ_MODE_MSIX); + + ctrl_info->controller_online = true; + pqi_ctrl_unblock_requests(ctrl_info); + + rc = pqi_process_config_table(ctrl_info); + if (rc) + return rc; + + pqi_start_heartbeat_timer(ctrl_info); + + rc = pqi_enable_events(ctrl_info); + if (rc) { + dev_err(&ctrl_info->pci_dev->dev, + "error enabling events\n"); + return rc; + } + + rc = pqi_get_ctrl_product_details(ctrl_info); + if (rc) { + dev_err(&ctrl_info->pci_dev->dev, + "error obtaining product details\n"); + return rc; + } + + rc = pqi_set_diag_rescan(ctrl_info); + if (rc) { + dev_err(&ctrl_info->pci_dev->dev, + "error enabling multi-lun rescan\n"); + return rc; + } + + rc = pqi_write_driver_version_to_host_wellness(ctrl_info); + if (rc) { + dev_err(&ctrl_info->pci_dev->dev, + "error updating host wellness\n"); + return rc; + } + + pqi_schedule_update_time_worker(ctrl_info); + + pqi_scan_scsi_devices(ctrl_info); + + return 0; +} + +static inline int pqi_set_pcie_completion_timeout(struct pci_dev *pci_dev, + u16 timeout) +{ + int rc; + + rc = pcie_capability_clear_and_set_word(pci_dev, PCI_EXP_DEVCTL2, + PCI_EXP_DEVCTL2_COMP_TIMEOUT, timeout); + + return pcibios_err_to_errno(rc); +} + +static int pqi_pci_init(struct pqi_ctrl_info *ctrl_info) +{ + int rc; + u64 mask; + + rc = pci_enable_device(ctrl_info->pci_dev); + if (rc) { + dev_err(&ctrl_info->pci_dev->dev, + "failed to enable PCI device\n"); + return rc; + } + + if (sizeof(dma_addr_t) > 4) + mask = DMA_BIT_MASK(64); + else + mask = DMA_BIT_MASK(32); + + rc = dma_set_mask_and_coherent(&ctrl_info->pci_dev->dev, mask); + if (rc) { + dev_err(&ctrl_info->pci_dev->dev, "failed to set DMA mask\n"); + goto disable_device; + } + + rc = pci_request_regions(ctrl_info->pci_dev, DRIVER_NAME_SHORT); + if (rc) { + dev_err(&ctrl_info->pci_dev->dev, + "failed to obtain PCI resources\n"); + goto disable_device; + } + + ctrl_info->iomem_base = ioremap(pci_resource_start( + ctrl_info->pci_dev, 0), + sizeof(struct pqi_ctrl_registers)); + if (!ctrl_info->iomem_base) { + dev_err(&ctrl_info->pci_dev->dev, + "failed to map memory for controller registers\n"); + rc = -ENOMEM; + goto release_regions; + } + +#define PCI_EXP_COMP_TIMEOUT_65_TO_210_MS 0x6 + + /* Increase the PCIe completion timeout. */ + rc = pqi_set_pcie_completion_timeout(ctrl_info->pci_dev, + PCI_EXP_COMP_TIMEOUT_65_TO_210_MS); + if (rc) { + dev_err(&ctrl_info->pci_dev->dev, + "failed to set PCIe completion timeout\n"); + goto release_regions; + } + + /* Enable bus mastering. */ + pci_set_master(ctrl_info->pci_dev); + + ctrl_info->registers = ctrl_info->iomem_base; + ctrl_info->pqi_registers = &ctrl_info->registers->pqi_registers; + + pci_set_drvdata(ctrl_info->pci_dev, ctrl_info); + + return 0; + +release_regions: + pci_release_regions(ctrl_info->pci_dev); +disable_device: + pci_disable_device(ctrl_info->pci_dev); + + return rc; +} + +static void pqi_cleanup_pci_init(struct pqi_ctrl_info *ctrl_info) +{ + iounmap(ctrl_info->iomem_base); + pci_release_regions(ctrl_info->pci_dev); + if (pci_is_enabled(ctrl_info->pci_dev)) + pci_disable_device(ctrl_info->pci_dev); + pci_set_drvdata(ctrl_info->pci_dev, NULL); +} + +static struct pqi_ctrl_info *pqi_alloc_ctrl_info(int numa_node) +{ + struct pqi_ctrl_info *ctrl_info; + + ctrl_info = kzalloc_node(sizeof(struct pqi_ctrl_info), + GFP_KERNEL, numa_node); + if (!ctrl_info) + return NULL; + + mutex_init(&ctrl_info->scan_mutex); + mutex_init(&ctrl_info->lun_reset_mutex); + mutex_init(&ctrl_info->ofa_mutex); + + INIT_LIST_HEAD(&ctrl_info->scsi_device_list); + spin_lock_init(&ctrl_info->scsi_device_list_lock); + + INIT_WORK(&ctrl_info->event_work, pqi_event_worker); + atomic_set(&ctrl_info->num_interrupts, 0); + atomic_set(&ctrl_info->sync_cmds_outstanding, 0); + + INIT_DELAYED_WORK(&ctrl_info->rescan_work, pqi_rescan_worker); + INIT_DELAYED_WORK(&ctrl_info->update_time_work, pqi_update_time_worker); + + timer_setup(&ctrl_info->heartbeat_timer, pqi_heartbeat_timer_handler, 0); + INIT_WORK(&ctrl_info->ctrl_offline_work, pqi_ctrl_offline_worker); + + sema_init(&ctrl_info->sync_request_sem, + PQI_RESERVED_IO_SLOTS_SYNCHRONOUS_REQUESTS); + init_waitqueue_head(&ctrl_info->block_requests_wait); + + INIT_LIST_HEAD(&ctrl_info->raid_bypass_retry_list); + spin_lock_init(&ctrl_info->raid_bypass_retry_list_lock); + INIT_WORK(&ctrl_info->raid_bypass_retry_work, + pqi_raid_bypass_retry_worker); + + ctrl_info->ctrl_id = atomic_inc_return(&pqi_controller_count) - 1; + ctrl_info->irq_mode = IRQ_MODE_NONE; + ctrl_info->max_msix_vectors = PQI_MAX_MSIX_VECTORS; + + return ctrl_info; +} + +static inline void pqi_free_ctrl_info(struct pqi_ctrl_info *ctrl_info) +{ + kfree(ctrl_info); +} + +static void pqi_free_interrupts(struct pqi_ctrl_info *ctrl_info) +{ + pqi_free_irqs(ctrl_info); + pqi_disable_msix_interrupts(ctrl_info); +} + +static void pqi_free_ctrl_resources(struct pqi_ctrl_info *ctrl_info) +{ + pqi_stop_heartbeat_timer(ctrl_info); + pqi_free_interrupts(ctrl_info); + if (ctrl_info->queue_memory_base) + dma_free_coherent(&ctrl_info->pci_dev->dev, + ctrl_info->queue_memory_length, + ctrl_info->queue_memory_base, + ctrl_info->queue_memory_base_dma_handle); + if (ctrl_info->admin_queue_memory_base) + dma_free_coherent(&ctrl_info->pci_dev->dev, + ctrl_info->admin_queue_memory_length, + ctrl_info->admin_queue_memory_base, + ctrl_info->admin_queue_memory_base_dma_handle); + pqi_free_all_io_requests(ctrl_info); + if (ctrl_info->error_buffer) + dma_free_coherent(&ctrl_info->pci_dev->dev, + ctrl_info->error_buffer_length, + ctrl_info->error_buffer, + ctrl_info->error_buffer_dma_handle); + if (ctrl_info->iomem_base) + pqi_cleanup_pci_init(ctrl_info); + pqi_free_ctrl_info(ctrl_info); +} + +static void pqi_remove_ctrl(struct pqi_ctrl_info *ctrl_info) +{ + pqi_cancel_rescan_worker(ctrl_info); + pqi_cancel_update_time_worker(ctrl_info); + pqi_unregister_scsi(ctrl_info); + if (ctrl_info->pqi_mode_enabled) + pqi_revert_to_sis_mode(ctrl_info); + pqi_free_ctrl_resources(ctrl_info); +} + +static void pqi_ofa_ctrl_quiesce(struct pqi_ctrl_info *ctrl_info) +{ + pqi_cancel_update_time_worker(ctrl_info); + pqi_cancel_rescan_worker(ctrl_info); + pqi_wait_until_lun_reset_finished(ctrl_info); + pqi_wait_until_scan_finished(ctrl_info); + pqi_ctrl_ofa_start(ctrl_info); + pqi_ctrl_block_requests(ctrl_info); + pqi_ctrl_wait_until_quiesced(ctrl_info); + pqi_ctrl_wait_for_pending_io(ctrl_info, PQI_PENDING_IO_TIMEOUT_SECS); + pqi_fail_io_queued_for_all_devices(ctrl_info); + pqi_wait_until_inbound_queues_empty(ctrl_info); + pqi_stop_heartbeat_timer(ctrl_info); + ctrl_info->pqi_mode_enabled = false; + pqi_save_ctrl_mode(ctrl_info, SIS_MODE); +} + +static void pqi_ofa_ctrl_unquiesce(struct pqi_ctrl_info *ctrl_info) +{ + pqi_ofa_free_host_buffer(ctrl_info); + ctrl_info->pqi_mode_enabled = true; + pqi_save_ctrl_mode(ctrl_info, PQI_MODE); + ctrl_info->controller_online = true; + pqi_ctrl_unblock_requests(ctrl_info); + pqi_start_heartbeat_timer(ctrl_info); + pqi_schedule_update_time_worker(ctrl_info); + pqi_clear_soft_reset_status(ctrl_info, + PQI_SOFT_RESET_ABORT); + pqi_scan_scsi_devices(ctrl_info); +} + +static int pqi_ofa_alloc_mem(struct pqi_ctrl_info *ctrl_info, + u32 total_size, u32 chunk_size) +{ + u32 sg_count; + u32 size; + int i; + struct pqi_sg_descriptor *mem_descriptor = NULL; + struct device *dev; + struct pqi_ofa_memory *ofap; + + dev = &ctrl_info->pci_dev->dev; + + sg_count = (total_size + chunk_size - 1); + sg_count /= chunk_size; + + ofap = ctrl_info->pqi_ofa_mem_virt_addr; + + if (sg_count*chunk_size < total_size) + goto out; + + ctrl_info->pqi_ofa_chunk_virt_addr = + kcalloc(sg_count, sizeof(void *), GFP_KERNEL); + if (!ctrl_info->pqi_ofa_chunk_virt_addr) + goto out; + + for (size = 0, i = 0; size < total_size; size += chunk_size, i++) { + dma_addr_t dma_handle; + + ctrl_info->pqi_ofa_chunk_virt_addr[i] = + dma_alloc_coherent(dev, chunk_size, &dma_handle, + GFP_KERNEL); + + if (!ctrl_info->pqi_ofa_chunk_virt_addr[i]) + break; + + mem_descriptor = &ofap->sg_descriptor[i]; + put_unaligned_le64 ((u64) dma_handle, &mem_descriptor->address); + put_unaligned_le32 (chunk_size, &mem_descriptor->length); + } + + if (!size || size < total_size) + goto out_free_chunks; + + put_unaligned_le32(CISS_SG_LAST, &mem_descriptor->flags); + put_unaligned_le16(sg_count, &ofap->num_memory_descriptors); + put_unaligned_le32(size, &ofap->bytes_allocated); + + return 0; + +out_free_chunks: + while (--i >= 0) { + mem_descriptor = &ofap->sg_descriptor[i]; + dma_free_coherent(dev, chunk_size, + ctrl_info->pqi_ofa_chunk_virt_addr[i], + get_unaligned_le64(&mem_descriptor->address)); + } + kfree(ctrl_info->pqi_ofa_chunk_virt_addr); + +out: + put_unaligned_le32 (0, &ofap->bytes_allocated); + return -ENOMEM; +} + +static int pqi_ofa_alloc_host_buffer(struct pqi_ctrl_info *ctrl_info) +{ + u32 total_size; + u32 min_chunk_size; + u32 chunk_sz; + + total_size = le32_to_cpu( + ctrl_info->pqi_ofa_mem_virt_addr->bytes_allocated); + min_chunk_size = total_size / PQI_OFA_MAX_SG_DESCRIPTORS; + + for (chunk_sz = total_size; chunk_sz >= min_chunk_size; chunk_sz /= 2) + if (!pqi_ofa_alloc_mem(ctrl_info, total_size, chunk_sz)) + return 0; + + return -ENOMEM; +} + +static void pqi_ofa_setup_host_buffer(struct pqi_ctrl_info *ctrl_info, + u32 bytes_requested) +{ + struct pqi_ofa_memory *pqi_ofa_memory; + struct device *dev; + + dev = &ctrl_info->pci_dev->dev; + pqi_ofa_memory = dma_alloc_coherent(dev, + PQI_OFA_MEMORY_DESCRIPTOR_LENGTH, + &ctrl_info->pqi_ofa_mem_dma_handle, + GFP_KERNEL); + + if (!pqi_ofa_memory) + return; + + put_unaligned_le16(PQI_OFA_VERSION, &pqi_ofa_memory->version); + memcpy(&pqi_ofa_memory->signature, PQI_OFA_SIGNATURE, + sizeof(pqi_ofa_memory->signature)); + pqi_ofa_memory->bytes_allocated = cpu_to_le32(bytes_requested); + + ctrl_info->pqi_ofa_mem_virt_addr = pqi_ofa_memory; + + if (pqi_ofa_alloc_host_buffer(ctrl_info) < 0) { + dev_err(dev, "Failed to allocate host buffer of size = %u", + bytes_requested); + } + + return; +} + +static void pqi_ofa_free_host_buffer(struct pqi_ctrl_info *ctrl_info) +{ + int i; + struct pqi_sg_descriptor *mem_descriptor; + struct pqi_ofa_memory *ofap; + + ofap = ctrl_info->pqi_ofa_mem_virt_addr; + + if (!ofap) + return; + + if (!ofap->bytes_allocated) + goto out; + + mem_descriptor = ofap->sg_descriptor; + + for (i = 0; i < get_unaligned_le16(&ofap->num_memory_descriptors); + i++) { + dma_free_coherent(&ctrl_info->pci_dev->dev, + get_unaligned_le32(&mem_descriptor[i].length), + ctrl_info->pqi_ofa_chunk_virt_addr[i], + get_unaligned_le64(&mem_descriptor[i].address)); + } + kfree(ctrl_info->pqi_ofa_chunk_virt_addr); + +out: + dma_free_coherent(&ctrl_info->pci_dev->dev, + PQI_OFA_MEMORY_DESCRIPTOR_LENGTH, ofap, + ctrl_info->pqi_ofa_mem_dma_handle); + ctrl_info->pqi_ofa_mem_virt_addr = NULL; +} + +static int pqi_ofa_host_memory_update(struct pqi_ctrl_info *ctrl_info) +{ + struct pqi_vendor_general_request request; + size_t size; + struct pqi_ofa_memory *ofap; + + memset(&request, 0, sizeof(request)); + + ofap = ctrl_info->pqi_ofa_mem_virt_addr; + + request.header.iu_type = PQI_REQUEST_IU_VENDOR_GENERAL; + put_unaligned_le16(sizeof(request) - PQI_REQUEST_HEADER_LENGTH, + &request.header.iu_length); + put_unaligned_le16(PQI_VENDOR_GENERAL_HOST_MEMORY_UPDATE, + &request.function_code); + + if (ofap) { + size = offsetof(struct pqi_ofa_memory, sg_descriptor) + + get_unaligned_le16(&ofap->num_memory_descriptors) * + sizeof(struct pqi_sg_descriptor); + + put_unaligned_le64((u64)ctrl_info->pqi_ofa_mem_dma_handle, + &request.data.ofa_memory_allocation.buffer_address); + put_unaligned_le32(size, + &request.data.ofa_memory_allocation.buffer_length); + + } + + return pqi_submit_raid_request_synchronous(ctrl_info, &request.header, + 0, NULL, NO_TIMEOUT); +} + +static int pqi_ofa_ctrl_restart(struct pqi_ctrl_info *ctrl_info) +{ + msleep(PQI_POST_RESET_DELAY_B4_MSGU_READY); + return pqi_ctrl_init_resume(ctrl_info); +} + +static void pqi_perform_lockup_action(void) +{ + switch (pqi_lockup_action) { + case PANIC: + panic("FATAL: Smart Family Controller lockup detected"); + break; + case REBOOT: + emergency_restart(); + break; + case NONE: + default: + break; + } +} + +static struct pqi_raid_error_info pqi_ctrl_offline_raid_error_info = { + .data_out_result = PQI_DATA_IN_OUT_HARDWARE_ERROR, + .status = SAM_STAT_CHECK_CONDITION, +}; + +static void pqi_fail_all_outstanding_requests(struct pqi_ctrl_info *ctrl_info) +{ + unsigned int i; + struct pqi_io_request *io_request; + struct scsi_cmnd *scmd; + + for (i = 0; i < ctrl_info->max_io_slots; i++) { + io_request = &ctrl_info->io_request_pool[i]; + if (atomic_read(&io_request->refcount) == 0) + continue; + + scmd = io_request->scmd; + if (scmd) { + set_host_byte(scmd, DID_NO_CONNECT); + } else { + io_request->status = -ENXIO; + io_request->error_info = + &pqi_ctrl_offline_raid_error_info; + } + + io_request->io_complete_callback(io_request, + io_request->context); + } +} + +static void pqi_take_ctrl_offline_deferred(struct pqi_ctrl_info *ctrl_info) +{ + pqi_perform_lockup_action(); + pqi_stop_heartbeat_timer(ctrl_info); + pqi_free_interrupts(ctrl_info); + pqi_cancel_rescan_worker(ctrl_info); + pqi_cancel_update_time_worker(ctrl_info); + pqi_ctrl_wait_until_quiesced(ctrl_info); + pqi_fail_all_outstanding_requests(ctrl_info); + pqi_clear_all_queued_raid_bypass_retries(ctrl_info); + pqi_ctrl_unblock_requests(ctrl_info); +} + +static void pqi_ctrl_offline_worker(struct work_struct *work) +{ + struct pqi_ctrl_info *ctrl_info; + + ctrl_info = container_of(work, struct pqi_ctrl_info, ctrl_offline_work); + pqi_take_ctrl_offline_deferred(ctrl_info); +} + +static void pqi_take_ctrl_offline(struct pqi_ctrl_info *ctrl_info) +{ + if (!ctrl_info->controller_online) + return; + + ctrl_info->controller_online = false; + ctrl_info->pqi_mode_enabled = false; + pqi_ctrl_block_requests(ctrl_info); + if (!pqi_disable_ctrl_shutdown) + sis_shutdown_ctrl(ctrl_info); + pci_disable_device(ctrl_info->pci_dev); + dev_err(&ctrl_info->pci_dev->dev, "controller offline\n"); + schedule_work(&ctrl_info->ctrl_offline_work); +} + +static void pqi_print_ctrl_info(struct pci_dev *pci_dev, + const struct pci_device_id *id) +{ + char *ctrl_description; + + if (id->driver_data) + ctrl_description = (char *)id->driver_data; + else + ctrl_description = "Microsemi Smart Family Controller"; + + dev_info(&pci_dev->dev, "%s found\n", ctrl_description); +} + +static int pqi_pci_probe(struct pci_dev *pci_dev, + const struct pci_device_id *id) +{ + int rc; + int node, cp_node; + struct pqi_ctrl_info *ctrl_info; + + pqi_print_ctrl_info(pci_dev, id); + + if (pqi_disable_device_id_wildcards && + id->subvendor == PCI_ANY_ID && + id->subdevice == PCI_ANY_ID) { + dev_warn(&pci_dev->dev, + "controller not probed because device ID wildcards are disabled\n"); + return -ENODEV; + } + + if (id->subvendor == PCI_ANY_ID || id->subdevice == PCI_ANY_ID) + dev_warn(&pci_dev->dev, + "controller device ID matched using wildcards\n"); + + node = dev_to_node(&pci_dev->dev); + if (node == NUMA_NO_NODE) { + cp_node = cpu_to_node(0); + if (cp_node == NUMA_NO_NODE) + cp_node = 0; + set_dev_node(&pci_dev->dev, cp_node); + } + + ctrl_info = pqi_alloc_ctrl_info(node); + if (!ctrl_info) { + dev_err(&pci_dev->dev, + "failed to allocate controller info block\n"); + return -ENOMEM; + } + + ctrl_info->pci_dev = pci_dev; + + rc = pqi_pci_init(ctrl_info); + if (rc) + goto error; + + rc = pqi_ctrl_init(ctrl_info); + if (rc) + goto error; + + return 0; + +error: + pqi_remove_ctrl(ctrl_info); + + return rc; +} + +static void pqi_pci_remove(struct pci_dev *pci_dev) +{ + struct pqi_ctrl_info *ctrl_info; + + ctrl_info = pci_get_drvdata(pci_dev); + if (!ctrl_info) + return; + + ctrl_info->in_shutdown = true; + + pqi_remove_ctrl(ctrl_info); +} + +static void pqi_crash_if_pending_command(struct pqi_ctrl_info *ctrl_info) +{ + unsigned int i; + struct pqi_io_request *io_request; + struct scsi_cmnd *scmd; + + for (i = 0; i < ctrl_info->max_io_slots; i++) { + io_request = &ctrl_info->io_request_pool[i]; + if (atomic_read(&io_request->refcount) == 0) + continue; + scmd = io_request->scmd; + WARN_ON(scmd != NULL); /* IO command from SML */ + WARN_ON(scmd == NULL); /* Non-IO cmd or driver initiated*/ + } +} + +static void pqi_shutdown(struct pci_dev *pci_dev) +{ + int rc; + struct pqi_ctrl_info *ctrl_info; + + ctrl_info = pci_get_drvdata(pci_dev); + if (!ctrl_info) { + dev_err(&pci_dev->dev, + "cache could not be flushed\n"); + return; + } + + pqi_disable_events(ctrl_info); + pqi_wait_until_ofa_finished(ctrl_info); + pqi_cancel_update_time_worker(ctrl_info); + pqi_cancel_rescan_worker(ctrl_info); + pqi_cancel_event_worker(ctrl_info); + + pqi_ctrl_shutdown_start(ctrl_info); + pqi_ctrl_wait_until_quiesced(ctrl_info); + + rc = pqi_ctrl_wait_for_pending_io(ctrl_info, NO_TIMEOUT); + if (rc) { + dev_err(&pci_dev->dev, + "wait for pending I/O failed\n"); + return; + } + + pqi_ctrl_block_device_reset(ctrl_info); + pqi_wait_until_lun_reset_finished(ctrl_info); + + /* + * Write all data in the controller's battery-backed cache to + * storage. + */ + rc = pqi_flush_cache(ctrl_info, SHUTDOWN); + if (rc) + dev_err(&pci_dev->dev, + "unable to flush controller cache\n"); + + pqi_ctrl_block_requests(ctrl_info); + + rc = pqi_ctrl_wait_for_pending_sync_cmds(ctrl_info); + if (rc) { + dev_err(&pci_dev->dev, + "wait for pending sync cmds failed\n"); + return; + } + + pqi_crash_if_pending_command(ctrl_info); + pqi_reset(ctrl_info); +} + +static void pqi_process_lockup_action_param(void) +{ + unsigned int i; + + if (!pqi_lockup_action_param) + return; + + for (i = 0; i < ARRAY_SIZE(pqi_lockup_actions); i++) { + if (strcmp(pqi_lockup_action_param, + pqi_lockup_actions[i].name) == 0) { + pqi_lockup_action = pqi_lockup_actions[i].action; + return; + } + } + + pr_warn("%s: invalid lockup action setting \"%s\" - supported settings: none, reboot, panic\n", + DRIVER_NAME_SHORT, pqi_lockup_action_param); +} + +static void pqi_process_module_params(void) +{ + pqi_process_lockup_action_param(); +} + +static __maybe_unused int pqi_suspend(struct pci_dev *pci_dev, pm_message_t state) +{ + struct pqi_ctrl_info *ctrl_info; + + ctrl_info = pci_get_drvdata(pci_dev); + + pqi_disable_events(ctrl_info); + pqi_cancel_update_time_worker(ctrl_info); + pqi_cancel_rescan_worker(ctrl_info); + pqi_wait_until_scan_finished(ctrl_info); + pqi_wait_until_lun_reset_finished(ctrl_info); + pqi_wait_until_ofa_finished(ctrl_info); + pqi_flush_cache(ctrl_info, SUSPEND); + pqi_ctrl_block_requests(ctrl_info); + pqi_ctrl_wait_until_quiesced(ctrl_info); + pqi_wait_until_inbound_queues_empty(ctrl_info); + pqi_ctrl_wait_for_pending_io(ctrl_info, NO_TIMEOUT); + pqi_stop_heartbeat_timer(ctrl_info); + + if (state.event == PM_EVENT_FREEZE) + return 0; + + pci_save_state(pci_dev); + pci_set_power_state(pci_dev, pci_choose_state(pci_dev, state)); + + ctrl_info->controller_online = false; + ctrl_info->pqi_mode_enabled = false; + + return 0; +} + +static __maybe_unused int pqi_resume(struct pci_dev *pci_dev) +{ + int rc; + struct pqi_ctrl_info *ctrl_info; + + ctrl_info = pci_get_drvdata(pci_dev); + + if (pci_dev->current_state != PCI_D0) { + ctrl_info->max_hw_queue_index = 0; + pqi_free_interrupts(ctrl_info); + pqi_change_irq_mode(ctrl_info, IRQ_MODE_INTX); + rc = request_irq(pci_irq_vector(pci_dev, 0), pqi_irq_handler, + IRQF_SHARED, DRIVER_NAME_SHORT, + &ctrl_info->queue_groups[0]); + if (rc) { + dev_err(&ctrl_info->pci_dev->dev, + "irq %u init failed with error %d\n", + pci_dev->irq, rc); + return rc; + } + pqi_start_heartbeat_timer(ctrl_info); + pqi_ctrl_unblock_requests(ctrl_info); + return 0; + } + + pci_set_power_state(pci_dev, PCI_D0); + pci_restore_state(pci_dev); + + return pqi_ctrl_init_resume(ctrl_info); +} + +/* Define the PCI IDs for the controllers that we support. */ +static const struct pci_device_id pqi_pci_id_table[] = { + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + 0x105b, 0x1211) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + 0x105b, 0x1321) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + 0x152d, 0x8a22) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + 0x152d, 0x8a23) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + 0x152d, 0x8a24) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + 0x152d, 0x8a36) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + 0x152d, 0x8a37) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + 0x193d, 0x8460) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + 0x193d, 0x1104) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + 0x193d, 0x1105) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + 0x193d, 0x1106) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + 0x193d, 0x1107) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + 0x193d, 0x8460) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + 0x193d, 0x8461) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + 0x193d, 0xc460) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + 0x193d, 0xc461) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + 0x193d, 0xf460) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + 0x193d, 0xf461) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + 0x1bd4, 0x0045) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + 0x1bd4, 0x0046) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + 0x1bd4, 0x0047) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + 0x1bd4, 0x0048) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + 0x1bd4, 0x004a) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + 0x1bd4, 0x004b) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + 0x1bd4, 0x004c) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + 0x1bd4, 0x004f) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + 0x1bd4, 0x0051) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + 0x1bd4, 0x0052) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + 0x1bd4, 0x0053) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + 0x1bd4, 0x0054) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + 0x19e5, 0xd227) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + 0x19e5, 0xd228) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + 0x19e5, 0xd229) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + 0x19e5, 0xd22a) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + 0x19e5, 0xd22b) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + 0x19e5, 0xd22c) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + PCI_VENDOR_ID_ADAPTEC2, 0x0110) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + PCI_VENDOR_ID_ADAPTEC2, 0x0608) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + PCI_VENDOR_ID_ADAPTEC2, 0x0800) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + PCI_VENDOR_ID_ADAPTEC2, 0x0801) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + PCI_VENDOR_ID_ADAPTEC2, 0x0802) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + PCI_VENDOR_ID_ADAPTEC2, 0x0803) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + PCI_VENDOR_ID_ADAPTEC2, 0x0804) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + PCI_VENDOR_ID_ADAPTEC2, 0x0805) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + PCI_VENDOR_ID_ADAPTEC2, 0x0806) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + PCI_VENDOR_ID_ADAPTEC2, 0x0807) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + PCI_VENDOR_ID_ADAPTEC2, 0x0808) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + PCI_VENDOR_ID_ADAPTEC2, 0x0809) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + PCI_VENDOR_ID_ADAPTEC2, 0x080a) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + PCI_VENDOR_ID_ADAPTEC2, 0x0900) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + PCI_VENDOR_ID_ADAPTEC2, 0x0901) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + PCI_VENDOR_ID_ADAPTEC2, 0x0902) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + PCI_VENDOR_ID_ADAPTEC2, 0x0903) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + PCI_VENDOR_ID_ADAPTEC2, 0x0904) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + PCI_VENDOR_ID_ADAPTEC2, 0x0905) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + PCI_VENDOR_ID_ADAPTEC2, 0x0906) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + PCI_VENDOR_ID_ADAPTEC2, 0x0907) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + PCI_VENDOR_ID_ADAPTEC2, 0x0908) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + PCI_VENDOR_ID_ADAPTEC2, 0x090a) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + PCI_VENDOR_ID_ADAPTEC2, 0x1200) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + PCI_VENDOR_ID_ADAPTEC2, 0x1201) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + PCI_VENDOR_ID_ADAPTEC2, 0x1202) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + PCI_VENDOR_ID_ADAPTEC2, 0x1280) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + PCI_VENDOR_ID_ADAPTEC2, 0x1281) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + PCI_VENDOR_ID_ADAPTEC2, 0x1282) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + PCI_VENDOR_ID_ADAPTEC2, 0x1300) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + PCI_VENDOR_ID_ADAPTEC2, 0x1301) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + PCI_VENDOR_ID_ADAPTEC2, 0x1302) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + PCI_VENDOR_ID_ADAPTEC2, 0x1303) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + PCI_VENDOR_ID_ADAPTEC2, 0x1380) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + PCI_VENDOR_ID_ADAPTEC2, 0x1400) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + PCI_VENDOR_ID_ADAPTEC2, 0x1402) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + PCI_VENDOR_ID_ADAPTEC2, 0x1410) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + PCI_VENDOR_ID_ADAPTEC2, 0x1411) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + PCI_VENDOR_ID_ADAPTEC2, 0x1412) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + PCI_VENDOR_ID_ADAPTEC2, 0x1420) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + PCI_VENDOR_ID_ADAPTEC2, 0x1430) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + PCI_VENDOR_ID_ADAPTEC2, 0x1440) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + PCI_VENDOR_ID_ADAPTEC2, 0x1441) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + PCI_VENDOR_ID_ADAPTEC2, 0x1450) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + PCI_VENDOR_ID_ADAPTEC2, 0x1452) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + PCI_VENDOR_ID_ADAPTEC2, 0x1460) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + PCI_VENDOR_ID_ADAPTEC2, 0x1461) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + PCI_VENDOR_ID_ADAPTEC2, 0x1462) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + PCI_VENDOR_ID_ADAPTEC2, 0x1470) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + PCI_VENDOR_ID_ADAPTEC2, 0x1471) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + PCI_VENDOR_ID_ADAPTEC2, 0x1472) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + PCI_VENDOR_ID_ADAPTEC2, 0x1480) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + PCI_VENDOR_ID_ADAPTEC2, 0x1490) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + PCI_VENDOR_ID_ADAPTEC2, 0x1491) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + PCI_VENDOR_ID_ADAPTEC2, 0x14a0) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + PCI_VENDOR_ID_ADAPTEC2, 0x14a1) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + PCI_VENDOR_ID_ADAPTEC2, 0x14b0) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + PCI_VENDOR_ID_ADAPTEC2, 0x14b1) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + PCI_VENDOR_ID_ADAPTEC2, 0x14c0) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + PCI_VENDOR_ID_ADAPTEC2, 0x14c1) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + PCI_VENDOR_ID_ADAPTEC2, 0x14d0) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + PCI_VENDOR_ID_ADAPTEC2, 0x14e0) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + PCI_VENDOR_ID_ADAPTEC2, 0x14f0) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + PCI_VENDOR_ID_ADVANTECH, 0x8312) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + PCI_VENDOR_ID_DELL, 0x1fe0) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + PCI_VENDOR_ID_HP, 0x0600) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + PCI_VENDOR_ID_HP, 0x0601) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + PCI_VENDOR_ID_HP, 0x0602) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + PCI_VENDOR_ID_HP, 0x0603) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + PCI_VENDOR_ID_HP, 0x0609) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + PCI_VENDOR_ID_HP, 0x0650) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + PCI_VENDOR_ID_HP, 0x0651) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + PCI_VENDOR_ID_HP, 0x0652) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + PCI_VENDOR_ID_HP, 0x0653) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + PCI_VENDOR_ID_HP, 0x0654) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + PCI_VENDOR_ID_HP, 0x0655) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + PCI_VENDOR_ID_HP, 0x0700) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + PCI_VENDOR_ID_HP, 0x0701) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + PCI_VENDOR_ID_HP, 0x1001) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + PCI_VENDOR_ID_HP, 0x1002) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + PCI_VENDOR_ID_HP, 0x1100) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + PCI_VENDOR_ID_HP, 0x1101) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + 0x1590, 0x0294) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + 0x1590, 0x02db) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + 0x1590, 0x02dc) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + 0x1590, 0x032e) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + 0x1d8d, 0x0800) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + 0x1d8d, 0x0908) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + 0x1d8d, 0x0806) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + 0x1d8d, 0x0916) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + PCI_VENDOR_ID_GIGABYTE, 0x1000) + }, + { + PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f, + PCI_ANY_ID, PCI_ANY_ID) + }, + { 0 } +}; + +MODULE_DEVICE_TABLE(pci, pqi_pci_id_table); + +static struct pci_driver pqi_pci_driver = { + .name = DRIVER_NAME_SHORT, + .id_table = pqi_pci_id_table, + .probe = pqi_pci_probe, + .remove = pqi_pci_remove, + .shutdown = pqi_shutdown, +#if defined(CONFIG_PM) + .suspend = pqi_suspend, + .resume = pqi_resume, +#endif +}; + +static int __init pqi_init(void) +{ + int rc; + + pr_info(DRIVER_NAME "\n"); + + pqi_sas_transport_template = sas_attach_transport(&pqi_sas_transport_functions); + if (!pqi_sas_transport_template) + return -ENODEV; + + pqi_process_module_params(); + + rc = pci_register_driver(&pqi_pci_driver); + if (rc) + sas_release_transport(pqi_sas_transport_template); + + return rc; +} + +static void __exit pqi_cleanup(void) +{ + pci_unregister_driver(&pqi_pci_driver); + sas_release_transport(pqi_sas_transport_template); +} + +module_init(pqi_init); +module_exit(pqi_cleanup); + +static void __attribute__((unused)) verify_structures(void) +{ + BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers, + sis_host_to_ctrl_doorbell) != 0x20); + BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers, + sis_interrupt_mask) != 0x34); + BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers, + sis_ctrl_to_host_doorbell) != 0x9c); + BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers, + sis_ctrl_to_host_doorbell_clear) != 0xa0); + BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers, + sis_driver_scratch) != 0xb0); + BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers, + sis_firmware_status) != 0xbc); + BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers, + sis_mailbox) != 0x1000); + BUILD_BUG_ON(offsetof(struct pqi_ctrl_registers, + pqi_registers) != 0x4000); + + BUILD_BUG_ON(offsetof(struct pqi_iu_header, + iu_type) != 0x0); + BUILD_BUG_ON(offsetof(struct pqi_iu_header, + iu_length) != 0x2); + BUILD_BUG_ON(offsetof(struct pqi_iu_header, + response_queue_id) != 0x4); + BUILD_BUG_ON(offsetof(struct pqi_iu_header, + work_area) != 0x6); + BUILD_BUG_ON(sizeof(struct pqi_iu_header) != 0x8); + + BUILD_BUG_ON(offsetof(struct pqi_aio_error_info, + status) != 0x0); + BUILD_BUG_ON(offsetof(struct pqi_aio_error_info, + service_response) != 0x1); + BUILD_BUG_ON(offsetof(struct pqi_aio_error_info, + data_present) != 0x2); + BUILD_BUG_ON(offsetof(struct pqi_aio_error_info, + reserved) != 0x3); + BUILD_BUG_ON(offsetof(struct pqi_aio_error_info, + residual_count) != 0x4); + BUILD_BUG_ON(offsetof(struct pqi_aio_error_info, + data_length) != 0x8); + BUILD_BUG_ON(offsetof(struct pqi_aio_error_info, + reserved1) != 0xa); + BUILD_BUG_ON(offsetof(struct pqi_aio_error_info, + data) != 0xc); + BUILD_BUG_ON(sizeof(struct pqi_aio_error_info) != 0x10c); + + BUILD_BUG_ON(offsetof(struct pqi_raid_error_info, + data_in_result) != 0x0); + BUILD_BUG_ON(offsetof(struct pqi_raid_error_info, + data_out_result) != 0x1); + BUILD_BUG_ON(offsetof(struct pqi_raid_error_info, + reserved) != 0x2); + BUILD_BUG_ON(offsetof(struct pqi_raid_error_info, + status) != 0x5); + BUILD_BUG_ON(offsetof(struct pqi_raid_error_info, + status_qualifier) != 0x6); + BUILD_BUG_ON(offsetof(struct pqi_raid_error_info, + sense_data_length) != 0x8); + BUILD_BUG_ON(offsetof(struct pqi_raid_error_info, + response_data_length) != 0xa); + BUILD_BUG_ON(offsetof(struct pqi_raid_error_info, + data_in_transferred) != 0xc); + BUILD_BUG_ON(offsetof(struct pqi_raid_error_info, + data_out_transferred) != 0x10); + BUILD_BUG_ON(offsetof(struct pqi_raid_error_info, + data) != 0x14); + BUILD_BUG_ON(sizeof(struct pqi_raid_error_info) != 0x114); + + BUILD_BUG_ON(offsetof(struct pqi_device_registers, + signature) != 0x0); + BUILD_BUG_ON(offsetof(struct pqi_device_registers, + function_and_status_code) != 0x8); + BUILD_BUG_ON(offsetof(struct pqi_device_registers, + max_admin_iq_elements) != 0x10); + BUILD_BUG_ON(offsetof(struct pqi_device_registers, + max_admin_oq_elements) != 0x11); + BUILD_BUG_ON(offsetof(struct pqi_device_registers, + admin_iq_element_length) != 0x12); + BUILD_BUG_ON(offsetof(struct pqi_device_registers, + admin_oq_element_length) != 0x13); + BUILD_BUG_ON(offsetof(struct pqi_device_registers, + max_reset_timeout) != 0x14); + BUILD_BUG_ON(offsetof(struct pqi_device_registers, + legacy_intx_status) != 0x18); + BUILD_BUG_ON(offsetof(struct pqi_device_registers, + legacy_intx_mask_set) != 0x1c); + BUILD_BUG_ON(offsetof(struct pqi_device_registers, + legacy_intx_mask_clear) != 0x20); + BUILD_BUG_ON(offsetof(struct pqi_device_registers, + device_status) != 0x40); + BUILD_BUG_ON(offsetof(struct pqi_device_registers, + admin_iq_pi_offset) != 0x48); + BUILD_BUG_ON(offsetof(struct pqi_device_registers, + admin_oq_ci_offset) != 0x50); + BUILD_BUG_ON(offsetof(struct pqi_device_registers, + admin_iq_element_array_addr) != 0x58); + BUILD_BUG_ON(offsetof(struct pqi_device_registers, + admin_oq_element_array_addr) != 0x60); + BUILD_BUG_ON(offsetof(struct pqi_device_registers, + admin_iq_ci_addr) != 0x68); + BUILD_BUG_ON(offsetof(struct pqi_device_registers, + admin_oq_pi_addr) != 0x70); + BUILD_BUG_ON(offsetof(struct pqi_device_registers, + admin_iq_num_elements) != 0x78); + BUILD_BUG_ON(offsetof(struct pqi_device_registers, + admin_oq_num_elements) != 0x79); + BUILD_BUG_ON(offsetof(struct pqi_device_registers, + admin_queue_int_msg_num) != 0x7a); + BUILD_BUG_ON(offsetof(struct pqi_device_registers, + device_error) != 0x80); + BUILD_BUG_ON(offsetof(struct pqi_device_registers, + error_details) != 0x88); + BUILD_BUG_ON(offsetof(struct pqi_device_registers, + device_reset) != 0x90); + BUILD_BUG_ON(offsetof(struct pqi_device_registers, + power_action) != 0x94); + BUILD_BUG_ON(sizeof(struct pqi_device_registers) != 0x100); + + BUILD_BUG_ON(offsetof(struct pqi_general_admin_request, + header.iu_type) != 0); + BUILD_BUG_ON(offsetof(struct pqi_general_admin_request, + header.iu_length) != 2); + BUILD_BUG_ON(offsetof(struct pqi_general_admin_request, + header.work_area) != 6); + BUILD_BUG_ON(offsetof(struct pqi_general_admin_request, + request_id) != 8); + BUILD_BUG_ON(offsetof(struct pqi_general_admin_request, + function_code) != 10); + BUILD_BUG_ON(offsetof(struct pqi_general_admin_request, + data.report_device_capability.buffer_length) != 44); + BUILD_BUG_ON(offsetof(struct pqi_general_admin_request, + data.report_device_capability.sg_descriptor) != 48); + BUILD_BUG_ON(offsetof(struct pqi_general_admin_request, + data.create_operational_iq.queue_id) != 12); + BUILD_BUG_ON(offsetof(struct pqi_general_admin_request, + data.create_operational_iq.element_array_addr) != 16); + BUILD_BUG_ON(offsetof(struct pqi_general_admin_request, + data.create_operational_iq.ci_addr) != 24); + BUILD_BUG_ON(offsetof(struct pqi_general_admin_request, + data.create_operational_iq.num_elements) != 32); + BUILD_BUG_ON(offsetof(struct pqi_general_admin_request, + data.create_operational_iq.element_length) != 34); + BUILD_BUG_ON(offsetof(struct pqi_general_admin_request, + data.create_operational_iq.queue_protocol) != 36); + BUILD_BUG_ON(offsetof(struct pqi_general_admin_request, + data.create_operational_oq.queue_id) != 12); + BUILD_BUG_ON(offsetof(struct pqi_general_admin_request, + data.create_operational_oq.element_array_addr) != 16); + BUILD_BUG_ON(offsetof(struct pqi_general_admin_request, + data.create_operational_oq.pi_addr) != 24); + BUILD_BUG_ON(offsetof(struct pqi_general_admin_request, + data.create_operational_oq.num_elements) != 32); + BUILD_BUG_ON(offsetof(struct pqi_general_admin_request, + data.create_operational_oq.element_length) != 34); + BUILD_BUG_ON(offsetof(struct pqi_general_admin_request, + data.create_operational_oq.queue_protocol) != 36); + BUILD_BUG_ON(offsetof(struct pqi_general_admin_request, + data.create_operational_oq.int_msg_num) != 40); + BUILD_BUG_ON(offsetof(struct pqi_general_admin_request, + data.create_operational_oq.coalescing_count) != 42); + BUILD_BUG_ON(offsetof(struct pqi_general_admin_request, + data.create_operational_oq.min_coalescing_time) != 44); + BUILD_BUG_ON(offsetof(struct pqi_general_admin_request, + data.create_operational_oq.max_coalescing_time) != 48); + BUILD_BUG_ON(offsetof(struct pqi_general_admin_request, + data.delete_operational_queue.queue_id) != 12); + BUILD_BUG_ON(sizeof(struct pqi_general_admin_request) != 64); + BUILD_BUG_ON(sizeof_field(struct pqi_general_admin_request, + data.create_operational_iq) != 64 - 11); + BUILD_BUG_ON(sizeof_field(struct pqi_general_admin_request, + data.create_operational_oq) != 64 - 11); + BUILD_BUG_ON(sizeof_field(struct pqi_general_admin_request, + data.delete_operational_queue) != 64 - 11); + + BUILD_BUG_ON(offsetof(struct pqi_general_admin_response, + header.iu_type) != 0); + BUILD_BUG_ON(offsetof(struct pqi_general_admin_response, + header.iu_length) != 2); + BUILD_BUG_ON(offsetof(struct pqi_general_admin_response, + header.work_area) != 6); + BUILD_BUG_ON(offsetof(struct pqi_general_admin_response, + request_id) != 8); + BUILD_BUG_ON(offsetof(struct pqi_general_admin_response, + function_code) != 10); + BUILD_BUG_ON(offsetof(struct pqi_general_admin_response, + status) != 11); + BUILD_BUG_ON(offsetof(struct pqi_general_admin_response, + data.create_operational_iq.status_descriptor) != 12); + BUILD_BUG_ON(offsetof(struct pqi_general_admin_response, + data.create_operational_iq.iq_pi_offset) != 16); + BUILD_BUG_ON(offsetof(struct pqi_general_admin_response, + data.create_operational_oq.status_descriptor) != 12); + BUILD_BUG_ON(offsetof(struct pqi_general_admin_response, + data.create_operational_oq.oq_ci_offset) != 16); + BUILD_BUG_ON(sizeof(struct pqi_general_admin_response) != 64); + + BUILD_BUG_ON(offsetof(struct pqi_raid_path_request, + header.iu_type) != 0); + BUILD_BUG_ON(offsetof(struct pqi_raid_path_request, + header.iu_length) != 2); + BUILD_BUG_ON(offsetof(struct pqi_raid_path_request, + header.response_queue_id) != 4); + BUILD_BUG_ON(offsetof(struct pqi_raid_path_request, + header.work_area) != 6); + BUILD_BUG_ON(offsetof(struct pqi_raid_path_request, + request_id) != 8); + BUILD_BUG_ON(offsetof(struct pqi_raid_path_request, + nexus_id) != 10); + BUILD_BUG_ON(offsetof(struct pqi_raid_path_request, + buffer_length) != 12); + BUILD_BUG_ON(offsetof(struct pqi_raid_path_request, + lun_number) != 16); + BUILD_BUG_ON(offsetof(struct pqi_raid_path_request, + protocol_specific) != 24); + BUILD_BUG_ON(offsetof(struct pqi_raid_path_request, + error_index) != 27); + BUILD_BUG_ON(offsetof(struct pqi_raid_path_request, + cdb) != 32); + BUILD_BUG_ON(offsetof(struct pqi_raid_path_request, + timeout) != 60); + BUILD_BUG_ON(offsetof(struct pqi_raid_path_request, + sg_descriptors) != 64); + BUILD_BUG_ON(sizeof(struct pqi_raid_path_request) != + PQI_OPERATIONAL_IQ_ELEMENT_LENGTH); + + BUILD_BUG_ON(offsetof(struct pqi_aio_path_request, + header.iu_type) != 0); + BUILD_BUG_ON(offsetof(struct pqi_aio_path_request, + header.iu_length) != 2); + BUILD_BUG_ON(offsetof(struct pqi_aio_path_request, + header.response_queue_id) != 4); + BUILD_BUG_ON(offsetof(struct pqi_aio_path_request, + header.work_area) != 6); + BUILD_BUG_ON(offsetof(struct pqi_aio_path_request, + request_id) != 8); + BUILD_BUG_ON(offsetof(struct pqi_aio_path_request, + nexus_id) != 12); + BUILD_BUG_ON(offsetof(struct pqi_aio_path_request, + buffer_length) != 16); + BUILD_BUG_ON(offsetof(struct pqi_aio_path_request, + data_encryption_key_index) != 22); + BUILD_BUG_ON(offsetof(struct pqi_aio_path_request, + encrypt_tweak_lower) != 24); + BUILD_BUG_ON(offsetof(struct pqi_aio_path_request, + encrypt_tweak_upper) != 28); + BUILD_BUG_ON(offsetof(struct pqi_aio_path_request, + cdb) != 32); + BUILD_BUG_ON(offsetof(struct pqi_aio_path_request, + error_index) != 48); + BUILD_BUG_ON(offsetof(struct pqi_aio_path_request, + num_sg_descriptors) != 50); + BUILD_BUG_ON(offsetof(struct pqi_aio_path_request, + cdb_length) != 51); + BUILD_BUG_ON(offsetof(struct pqi_aio_path_request, + lun_number) != 52); + BUILD_BUG_ON(offsetof(struct pqi_aio_path_request, + sg_descriptors) != 64); + BUILD_BUG_ON(sizeof(struct pqi_aio_path_request) != + PQI_OPERATIONAL_IQ_ELEMENT_LENGTH); + + BUILD_BUG_ON(offsetof(struct pqi_io_response, + header.iu_type) != 0); + BUILD_BUG_ON(offsetof(struct pqi_io_response, + header.iu_length) != 2); + BUILD_BUG_ON(offsetof(struct pqi_io_response, + request_id) != 8); + BUILD_BUG_ON(offsetof(struct pqi_io_response, + error_index) != 10); + + BUILD_BUG_ON(offsetof(struct pqi_general_management_request, + header.iu_type) != 0); + BUILD_BUG_ON(offsetof(struct pqi_general_management_request, + header.iu_length) != 2); + BUILD_BUG_ON(offsetof(struct pqi_general_management_request, + header.response_queue_id) != 4); + BUILD_BUG_ON(offsetof(struct pqi_general_management_request, + request_id) != 8); + BUILD_BUG_ON(offsetof(struct pqi_general_management_request, + data.report_event_configuration.buffer_length) != 12); + BUILD_BUG_ON(offsetof(struct pqi_general_management_request, + data.report_event_configuration.sg_descriptors) != 16); + BUILD_BUG_ON(offsetof(struct pqi_general_management_request, + data.set_event_configuration.global_event_oq_id) != 10); + BUILD_BUG_ON(offsetof(struct pqi_general_management_request, + data.set_event_configuration.buffer_length) != 12); + BUILD_BUG_ON(offsetof(struct pqi_general_management_request, + data.set_event_configuration.sg_descriptors) != 16); + + BUILD_BUG_ON(offsetof(struct pqi_iu_layer_descriptor, + max_inbound_iu_length) != 6); + BUILD_BUG_ON(offsetof(struct pqi_iu_layer_descriptor, + max_outbound_iu_length) != 14); + BUILD_BUG_ON(sizeof(struct pqi_iu_layer_descriptor) != 16); + + BUILD_BUG_ON(offsetof(struct pqi_device_capability, + data_length) != 0); + BUILD_BUG_ON(offsetof(struct pqi_device_capability, + iq_arbitration_priority_support_bitmask) != 8); + BUILD_BUG_ON(offsetof(struct pqi_device_capability, + maximum_aw_a) != 9); + BUILD_BUG_ON(offsetof(struct pqi_device_capability, + maximum_aw_b) != 10); + BUILD_BUG_ON(offsetof(struct pqi_device_capability, + maximum_aw_c) != 11); + BUILD_BUG_ON(offsetof(struct pqi_device_capability, + max_inbound_queues) != 16); + BUILD_BUG_ON(offsetof(struct pqi_device_capability, + max_elements_per_iq) != 18); + BUILD_BUG_ON(offsetof(struct pqi_device_capability, + max_iq_element_length) != 24); + BUILD_BUG_ON(offsetof(struct pqi_device_capability, + min_iq_element_length) != 26); + BUILD_BUG_ON(offsetof(struct pqi_device_capability, + max_outbound_queues) != 30); + BUILD_BUG_ON(offsetof(struct pqi_device_capability, + max_elements_per_oq) != 32); + BUILD_BUG_ON(offsetof(struct pqi_device_capability, + intr_coalescing_time_granularity) != 34); + BUILD_BUG_ON(offsetof(struct pqi_device_capability, + max_oq_element_length) != 36); + BUILD_BUG_ON(offsetof(struct pqi_device_capability, + min_oq_element_length) != 38); + BUILD_BUG_ON(offsetof(struct pqi_device_capability, + iu_layer_descriptors) != 64); + BUILD_BUG_ON(sizeof(struct pqi_device_capability) != 576); + + BUILD_BUG_ON(offsetof(struct pqi_event_descriptor, + event_type) != 0); + BUILD_BUG_ON(offsetof(struct pqi_event_descriptor, + oq_id) != 2); + BUILD_BUG_ON(sizeof(struct pqi_event_descriptor) != 4); + + BUILD_BUG_ON(offsetof(struct pqi_event_config, + num_event_descriptors) != 2); + BUILD_BUG_ON(offsetof(struct pqi_event_config, + descriptors) != 4); + + BUILD_BUG_ON(PQI_NUM_SUPPORTED_EVENTS != + ARRAY_SIZE(pqi_supported_event_types)); + + BUILD_BUG_ON(offsetof(struct pqi_event_response, + header.iu_type) != 0); + BUILD_BUG_ON(offsetof(struct pqi_event_response, + header.iu_length) != 2); + BUILD_BUG_ON(offsetof(struct pqi_event_response, + event_type) != 8); + BUILD_BUG_ON(offsetof(struct pqi_event_response, + event_id) != 10); + BUILD_BUG_ON(offsetof(struct pqi_event_response, + additional_event_id) != 12); + BUILD_BUG_ON(offsetof(struct pqi_event_response, + data) != 16); + BUILD_BUG_ON(sizeof(struct pqi_event_response) != 32); + + BUILD_BUG_ON(offsetof(struct pqi_event_acknowledge_request, + header.iu_type) != 0); + BUILD_BUG_ON(offsetof(struct pqi_event_acknowledge_request, + header.iu_length) != 2); + BUILD_BUG_ON(offsetof(struct pqi_event_acknowledge_request, + event_type) != 8); + BUILD_BUG_ON(offsetof(struct pqi_event_acknowledge_request, + event_id) != 10); + BUILD_BUG_ON(offsetof(struct pqi_event_acknowledge_request, + additional_event_id) != 12); + BUILD_BUG_ON(sizeof(struct pqi_event_acknowledge_request) != 16); + + BUILD_BUG_ON(offsetof(struct pqi_task_management_request, + header.iu_type) != 0); + BUILD_BUG_ON(offsetof(struct pqi_task_management_request, + header.iu_length) != 2); + BUILD_BUG_ON(offsetof(struct pqi_task_management_request, + request_id) != 8); + BUILD_BUG_ON(offsetof(struct pqi_task_management_request, + nexus_id) != 10); + BUILD_BUG_ON(offsetof(struct pqi_task_management_request, + timeout) != 14); + BUILD_BUG_ON(offsetof(struct pqi_task_management_request, + lun_number) != 16); + BUILD_BUG_ON(offsetof(struct pqi_task_management_request, + protocol_specific) != 24); + BUILD_BUG_ON(offsetof(struct pqi_task_management_request, + outbound_queue_id_to_manage) != 26); + BUILD_BUG_ON(offsetof(struct pqi_task_management_request, + request_id_to_manage) != 28); + BUILD_BUG_ON(offsetof(struct pqi_task_management_request, + task_management_function) != 30); + BUILD_BUG_ON(sizeof(struct pqi_task_management_request) != 32); + + BUILD_BUG_ON(offsetof(struct pqi_task_management_response, + header.iu_type) != 0); + BUILD_BUG_ON(offsetof(struct pqi_task_management_response, + header.iu_length) != 2); + BUILD_BUG_ON(offsetof(struct pqi_task_management_response, + request_id) != 8); + BUILD_BUG_ON(offsetof(struct pqi_task_management_response, + nexus_id) != 10); + BUILD_BUG_ON(offsetof(struct pqi_task_management_response, + additional_response_info) != 12); + BUILD_BUG_ON(offsetof(struct pqi_task_management_response, + response_code) != 15); + BUILD_BUG_ON(sizeof(struct pqi_task_management_response) != 16); + + BUILD_BUG_ON(offsetof(struct bmic_identify_controller, + configured_logical_drive_count) != 0); + BUILD_BUG_ON(offsetof(struct bmic_identify_controller, + configuration_signature) != 1); + BUILD_BUG_ON(offsetof(struct bmic_identify_controller, + firmware_version) != 5); + BUILD_BUG_ON(offsetof(struct bmic_identify_controller, + extended_logical_unit_count) != 154); + BUILD_BUG_ON(offsetof(struct bmic_identify_controller, + firmware_build_number) != 190); + BUILD_BUG_ON(offsetof(struct bmic_identify_controller, + controller_mode) != 292); + + BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device, + phys_bay_in_box) != 115); + BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device, + device_type) != 120); + BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device, + redundant_path_present_map) != 1736); + BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device, + active_path_number) != 1738); + BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device, + alternate_paths_phys_connector) != 1739); + BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device, + alternate_paths_phys_box_on_port) != 1755); + BUILD_BUG_ON(offsetof(struct bmic_identify_physical_device, + current_queue_depth_limit) != 1796); + BUILD_BUG_ON(sizeof(struct bmic_identify_physical_device) != 2560); + + BUILD_BUG_ON(PQI_ADMIN_IQ_NUM_ELEMENTS > 255); + BUILD_BUG_ON(PQI_ADMIN_OQ_NUM_ELEMENTS > 255); + BUILD_BUG_ON(PQI_ADMIN_IQ_ELEMENT_LENGTH % + PQI_QUEUE_ELEMENT_LENGTH_ALIGNMENT != 0); + BUILD_BUG_ON(PQI_ADMIN_OQ_ELEMENT_LENGTH % + PQI_QUEUE_ELEMENT_LENGTH_ALIGNMENT != 0); + BUILD_BUG_ON(PQI_OPERATIONAL_IQ_ELEMENT_LENGTH > 1048560); + BUILD_BUG_ON(PQI_OPERATIONAL_IQ_ELEMENT_LENGTH % + PQI_QUEUE_ELEMENT_LENGTH_ALIGNMENT != 0); + BUILD_BUG_ON(PQI_OPERATIONAL_OQ_ELEMENT_LENGTH > 1048560); + BUILD_BUG_ON(PQI_OPERATIONAL_OQ_ELEMENT_LENGTH % + PQI_QUEUE_ELEMENT_LENGTH_ALIGNMENT != 0); + + BUILD_BUG_ON(PQI_RESERVED_IO_SLOTS >= PQI_MAX_OUTSTANDING_REQUESTS); + BUILD_BUG_ON(PQI_RESERVED_IO_SLOTS >= + PQI_MAX_OUTSTANDING_REQUESTS_KDUMP); +} diff --git a/drivers/scsi/smartpqi/smartpqi_sas_transport.c b/drivers/scsi/smartpqi/smartpqi_sas_transport.c new file mode 100644 index 000000000..999870eb9 --- /dev/null +++ b/drivers/scsi/smartpqi/smartpqi_sas_transport.c @@ -0,0 +1,564 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * driver for Microsemi PQI-based storage controllers + * Copyright (c) 2019-2020 Microchip Technology Inc. and its subsidiaries + * Copyright (c) 2016-2018 Microsemi Corporation + * Copyright (c) 2016 PMC-Sierra, Inc. + * + * Questions/Comments/Bugfixes to storagedev@microchip.com + * + */ + +#include <linux/kernel.h> +#include <linux/bsg-lib.h> +#include <scsi/scsi_host.h> +#include <scsi/scsi_cmnd.h> +#include <scsi/scsi_transport_sas.h> +#include <asm/unaligned.h> +#include "smartpqi.h" + +static struct pqi_sas_phy *pqi_alloc_sas_phy(struct pqi_sas_port *pqi_sas_port) +{ + struct pqi_sas_phy *pqi_sas_phy; + struct sas_phy *phy; + + pqi_sas_phy = kzalloc(sizeof(*pqi_sas_phy), GFP_KERNEL); + if (!pqi_sas_phy) + return NULL; + + phy = sas_phy_alloc(pqi_sas_port->parent_node->parent_dev, + pqi_sas_port->next_phy_index); + if (!phy) { + kfree(pqi_sas_phy); + return NULL; + } + + pqi_sas_port->next_phy_index++; + pqi_sas_phy->phy = phy; + pqi_sas_phy->parent_port = pqi_sas_port; + + return pqi_sas_phy; +} + +static void pqi_free_sas_phy(struct pqi_sas_phy *pqi_sas_phy) +{ + struct sas_phy *phy = pqi_sas_phy->phy; + + sas_port_delete_phy(pqi_sas_phy->parent_port->port, phy); + if (pqi_sas_phy->added_to_port) + list_del(&pqi_sas_phy->phy_list_entry); + sas_phy_delete(phy); + kfree(pqi_sas_phy); +} + +static int pqi_sas_port_add_phy(struct pqi_sas_phy *pqi_sas_phy) +{ + int rc; + struct pqi_sas_port *pqi_sas_port; + struct sas_phy *phy; + struct sas_identify *identify; + + pqi_sas_port = pqi_sas_phy->parent_port; + phy = pqi_sas_phy->phy; + + identify = &phy->identify; + memset(identify, 0, sizeof(*identify)); + identify->sas_address = pqi_sas_port->sas_address; + identify->device_type = SAS_END_DEVICE; + identify->initiator_port_protocols = SAS_PROTOCOL_STP; + identify->target_port_protocols = SAS_PROTOCOL_STP; + phy->minimum_linkrate_hw = SAS_LINK_RATE_UNKNOWN; + phy->maximum_linkrate_hw = SAS_LINK_RATE_UNKNOWN; + phy->minimum_linkrate = SAS_LINK_RATE_UNKNOWN; + phy->maximum_linkrate = SAS_LINK_RATE_UNKNOWN; + phy->negotiated_linkrate = SAS_LINK_RATE_UNKNOWN; + + rc = sas_phy_add(pqi_sas_phy->phy); + if (rc) + return rc; + + sas_port_add_phy(pqi_sas_port->port, pqi_sas_phy->phy); + list_add_tail(&pqi_sas_phy->phy_list_entry, + &pqi_sas_port->phy_list_head); + pqi_sas_phy->added_to_port = true; + + return 0; +} + +static int pqi_sas_port_add_rphy(struct pqi_sas_port *pqi_sas_port, + struct sas_rphy *rphy) +{ + struct sas_identify *identify; + + identify = &rphy->identify; + identify->sas_address = pqi_sas_port->sas_address; + + if (pqi_sas_port->device && + pqi_sas_port->device->is_expander_smp_device) { + identify->initiator_port_protocols = SAS_PROTOCOL_SMP; + identify->target_port_protocols = SAS_PROTOCOL_SMP; + } else { + identify->initiator_port_protocols = SAS_PROTOCOL_STP; + identify->target_port_protocols = SAS_PROTOCOL_STP; + } + + return sas_rphy_add(rphy); +} + +static struct sas_rphy *pqi_sas_rphy_alloc(struct pqi_sas_port *pqi_sas_port) +{ + if (pqi_sas_port->device && + pqi_sas_port->device->is_expander_smp_device) + return sas_expander_alloc(pqi_sas_port->port, + SAS_FANOUT_EXPANDER_DEVICE); + + return sas_end_device_alloc(pqi_sas_port->port); +} + +static struct pqi_sas_port *pqi_alloc_sas_port( + struct pqi_sas_node *pqi_sas_node, u64 sas_address, + struct pqi_scsi_dev *device) +{ + int rc; + struct pqi_sas_port *pqi_sas_port; + struct sas_port *port; + + pqi_sas_port = kzalloc(sizeof(*pqi_sas_port), GFP_KERNEL); + if (!pqi_sas_port) + return NULL; + + INIT_LIST_HEAD(&pqi_sas_port->phy_list_head); + pqi_sas_port->parent_node = pqi_sas_node; + + port = sas_port_alloc_num(pqi_sas_node->parent_dev); + if (!port) + goto free_pqi_port; + + rc = sas_port_add(port); + if (rc) + goto free_sas_port; + + pqi_sas_port->port = port; + pqi_sas_port->sas_address = sas_address; + pqi_sas_port->device = device; + list_add_tail(&pqi_sas_port->port_list_entry, + &pqi_sas_node->port_list_head); + + return pqi_sas_port; + +free_sas_port: + sas_port_free(port); +free_pqi_port: + kfree(pqi_sas_port); + + return NULL; +} + +static void pqi_free_sas_port(struct pqi_sas_port *pqi_sas_port) +{ + struct pqi_sas_phy *pqi_sas_phy; + struct pqi_sas_phy *next; + + list_for_each_entry_safe(pqi_sas_phy, next, + &pqi_sas_port->phy_list_head, phy_list_entry) + pqi_free_sas_phy(pqi_sas_phy); + + sas_port_delete(pqi_sas_port->port); + list_del(&pqi_sas_port->port_list_entry); + kfree(pqi_sas_port); +} + +static struct pqi_sas_node *pqi_alloc_sas_node(struct device *parent_dev) +{ + struct pqi_sas_node *pqi_sas_node; + + pqi_sas_node = kzalloc(sizeof(*pqi_sas_node), GFP_KERNEL); + if (pqi_sas_node) { + pqi_sas_node->parent_dev = parent_dev; + INIT_LIST_HEAD(&pqi_sas_node->port_list_head); + } + + return pqi_sas_node; +} + +static void pqi_free_sas_node(struct pqi_sas_node *pqi_sas_node) +{ + struct pqi_sas_port *pqi_sas_port; + struct pqi_sas_port *next; + + if (!pqi_sas_node) + return; + + list_for_each_entry_safe(pqi_sas_port, next, + &pqi_sas_node->port_list_head, port_list_entry) + pqi_free_sas_port(pqi_sas_port); + + kfree(pqi_sas_node); +} + +struct pqi_scsi_dev *pqi_find_device_by_sas_rphy( + struct pqi_ctrl_info *ctrl_info, struct sas_rphy *rphy) +{ + struct pqi_scsi_dev *device; + + list_for_each_entry(device, &ctrl_info->scsi_device_list, + scsi_device_list_entry) { + if (!device->sas_port) + continue; + if (device->sas_port->rphy == rphy) + return device; + } + + return NULL; +} + +int pqi_add_sas_host(struct Scsi_Host *shost, struct pqi_ctrl_info *ctrl_info) +{ + int rc; + struct device *parent_dev; + struct pqi_sas_node *pqi_sas_node; + struct pqi_sas_port *pqi_sas_port; + struct pqi_sas_phy *pqi_sas_phy; + + parent_dev = &shost->shost_dev; + + pqi_sas_node = pqi_alloc_sas_node(parent_dev); + if (!pqi_sas_node) + return -ENOMEM; + + pqi_sas_port = pqi_alloc_sas_port(pqi_sas_node, + ctrl_info->sas_address, NULL); + if (!pqi_sas_port) { + rc = -ENODEV; + goto free_sas_node; + } + + pqi_sas_phy = pqi_alloc_sas_phy(pqi_sas_port); + if (!pqi_sas_phy) { + rc = -ENODEV; + goto free_sas_port; + } + + rc = pqi_sas_port_add_phy(pqi_sas_phy); + if (rc) + goto free_sas_phy; + + ctrl_info->sas_host = pqi_sas_node; + + return 0; + +free_sas_phy: + pqi_free_sas_phy(pqi_sas_phy); +free_sas_port: + pqi_free_sas_port(pqi_sas_port); +free_sas_node: + pqi_free_sas_node(pqi_sas_node); + + return rc; +} + +void pqi_delete_sas_host(struct pqi_ctrl_info *ctrl_info) +{ + pqi_free_sas_node(ctrl_info->sas_host); +} + +int pqi_add_sas_device(struct pqi_sas_node *pqi_sas_node, + struct pqi_scsi_dev *device) +{ + int rc; + struct pqi_sas_port *pqi_sas_port; + struct sas_rphy *rphy; + + pqi_sas_port = pqi_alloc_sas_port(pqi_sas_node, + device->sas_address, device); + if (!pqi_sas_port) + return -ENOMEM; + + rphy = pqi_sas_rphy_alloc(pqi_sas_port); + if (!rphy) { + rc = -ENODEV; + goto free_sas_port; + } + + pqi_sas_port->rphy = rphy; + device->sas_port = pqi_sas_port; + + rc = pqi_sas_port_add_rphy(pqi_sas_port, rphy); + if (rc) + goto free_sas_port; + + return 0; + +free_sas_port: + pqi_free_sas_port(pqi_sas_port); + device->sas_port = NULL; + + return rc; +} + +void pqi_remove_sas_device(struct pqi_scsi_dev *device) +{ + if (device->sas_port) { + pqi_free_sas_port(device->sas_port); + device->sas_port = NULL; + } +} + +static int pqi_sas_get_linkerrors(struct sas_phy *phy) +{ + return 0; +} + +static int pqi_sas_get_enclosure_identifier(struct sas_rphy *rphy, + u64 *identifier) +{ + int rc; + unsigned long flags; + struct Scsi_Host *shost; + struct pqi_ctrl_info *ctrl_info; + struct pqi_scsi_dev *found_device; + struct pqi_scsi_dev *device; + + if (!rphy) + return -ENODEV; + + shost = rphy_to_shost(rphy); + ctrl_info = shost_to_hba(shost); + spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags); + found_device = pqi_find_device_by_sas_rphy(ctrl_info, rphy); + + if (!found_device) { + rc = -ENODEV; + goto out; + } + + if (found_device->devtype == TYPE_ENCLOSURE) { + *identifier = get_unaligned_be64(&found_device->wwid); + rc = 0; + goto out; + } + + if (found_device->box_index == 0xff || + found_device->phys_box_on_bus == 0 || + found_device->bay == 0xff) { + rc = -EINVAL; + goto out; + } + + list_for_each_entry(device, &ctrl_info->scsi_device_list, + scsi_device_list_entry) { + if (device->devtype == TYPE_ENCLOSURE && + device->box_index == found_device->box_index && + device->phys_box_on_bus == + found_device->phys_box_on_bus && + memcmp(device->phys_connector, + found_device->phys_connector, 2) == 0) { + *identifier = + get_unaligned_be64(&device->wwid); + rc = 0; + goto out; + } + } + + if (found_device->phy_connected_dev_type != SA_DEVICE_TYPE_CONTROLLER) { + rc = -EINVAL; + goto out; + } + + list_for_each_entry(device, &ctrl_info->scsi_device_list, + scsi_device_list_entry) { + if (device->devtype == TYPE_ENCLOSURE && + CISS_GET_DRIVE_NUMBER(device->scsi3addr) == + PQI_VSEP_CISS_BTL) { + *identifier = get_unaligned_be64(&device->wwid); + rc = 0; + goto out; + } + } + + rc = -EINVAL; +out: + spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags); + + return rc; +} + +static int pqi_sas_get_bay_identifier(struct sas_rphy *rphy) +{ + int rc; + unsigned long flags; + struct pqi_ctrl_info *ctrl_info; + struct pqi_scsi_dev *device; + struct Scsi_Host *shost; + + if (!rphy) + return -ENODEV; + + shost = rphy_to_shost(rphy); + ctrl_info = shost_to_hba(shost); + spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags); + device = pqi_find_device_by_sas_rphy(ctrl_info, rphy); + + if (!device) { + rc = -ENODEV; + goto out; + } + + if (device->bay == 0xff) + rc = -EINVAL; + else + rc = device->bay; + +out: + spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags); + + return rc; +} + +static int pqi_sas_phy_reset(struct sas_phy *phy, int hard_reset) +{ + return 0; +} + +static int pqi_sas_phy_enable(struct sas_phy *phy, int enable) +{ + return 0; +} + +static int pqi_sas_phy_setup(struct sas_phy *phy) +{ + return 0; +} + +static void pqi_sas_phy_release(struct sas_phy *phy) +{ +} + +static int pqi_sas_phy_speed(struct sas_phy *phy, + struct sas_phy_linkrates *rates) +{ + return -EINVAL; +} + +#define CSMI_IOCTL_TIMEOUT 60 +#define SMP_CRC_FIELD_LENGTH 4 + +static struct bmic_csmi_smp_passthru_buffer * +pqi_build_csmi_smp_passthru_buffer(struct sas_rphy *rphy, + struct bsg_job *job) +{ + struct bmic_csmi_smp_passthru_buffer *smp_buf; + struct bmic_csmi_ioctl_header *ioctl_header; + struct bmic_csmi_smp_passthru *parameters; + u32 req_size; + u32 resp_size; + + smp_buf = kzalloc(sizeof(*smp_buf), GFP_KERNEL); + if (!smp_buf) + return NULL; + + req_size = job->request_payload.payload_len; + resp_size = job->reply_payload.payload_len; + + ioctl_header = &smp_buf->ioctl_header; + put_unaligned_le32(sizeof(smp_buf->ioctl_header), + &ioctl_header->header_length); + put_unaligned_le32(CSMI_IOCTL_TIMEOUT, &ioctl_header->timeout); + put_unaligned_le32(CSMI_CC_SAS_SMP_PASSTHRU, + &ioctl_header->control_code); + put_unaligned_le32(sizeof(smp_buf->parameters), &ioctl_header->length); + + parameters = &smp_buf->parameters; + parameters->phy_identifier = rphy->identify.phy_identifier; + parameters->port_identifier = 0; + parameters->connection_rate = 0; + put_unaligned_be64(rphy->identify.sas_address, + ¶meters->destination_sas_address); + + if (req_size > SMP_CRC_FIELD_LENGTH) + req_size -= SMP_CRC_FIELD_LENGTH; + + put_unaligned_le32(req_size, ¶meters->request_length); + put_unaligned_le32(resp_size, ¶meters->response_length); + + sg_copy_to_buffer(job->request_payload.sg_list, + job->reply_payload.sg_cnt, ¶meters->request, + req_size); + + return smp_buf; +} + +static unsigned int pqi_build_sas_smp_handler_reply( + struct bmic_csmi_smp_passthru_buffer *smp_buf, struct bsg_job *job, + struct pqi_raid_error_info *error_info) +{ + sg_copy_from_buffer(job->reply_payload.sg_list, + job->reply_payload.sg_cnt, &smp_buf->parameters.response, + le32_to_cpu(smp_buf->parameters.response_length)); + + job->reply_len = le16_to_cpu(error_info->sense_data_length); + memcpy(job->reply, error_info->data, + le16_to_cpu(error_info->sense_data_length)); + + return job->reply_payload.payload_len - + get_unaligned_le32(&error_info->data_in_transferred); +} + +void pqi_sas_smp_handler(struct bsg_job *job, struct Scsi_Host *shost, + struct sas_rphy *rphy) +{ + int rc; + struct pqi_ctrl_info *ctrl_info; + struct bmic_csmi_smp_passthru_buffer *smp_buf; + struct pqi_raid_error_info error_info; + unsigned int reslen = 0; + + ctrl_info = shost_to_hba(shost); + + if (job->reply_payload.payload_len == 0) { + rc = -ENOMEM; + goto out; + } + + if (!rphy) { + rc = -EINVAL; + goto out; + } + + if (rphy->identify.device_type != SAS_FANOUT_EXPANDER_DEVICE) { + rc = -EINVAL; + goto out; + } + + if (job->request_payload.sg_cnt > 1 || job->reply_payload.sg_cnt > 1) { + rc = -EINVAL; + goto out; + } + + smp_buf = pqi_build_csmi_smp_passthru_buffer(rphy, job); + if (!smp_buf) { + rc = -ENOMEM; + goto out; + } + + rc = pqi_csmi_smp_passthru(ctrl_info, smp_buf, sizeof(*smp_buf), + &error_info); + if (rc) + goto out; + + reslen = pqi_build_sas_smp_handler_reply(smp_buf, job, &error_info); +out: + bsg_job_done(job, rc, reslen); + pqi_ctrl_unbusy(ctrl_info); +} +struct sas_function_template pqi_sas_transport_functions = { + .get_linkerrors = pqi_sas_get_linkerrors, + .get_enclosure_identifier = pqi_sas_get_enclosure_identifier, + .get_bay_identifier = pqi_sas_get_bay_identifier, + .phy_reset = pqi_sas_phy_reset, + .phy_enable = pqi_sas_phy_enable, + .phy_setup = pqi_sas_phy_setup, + .phy_release = pqi_sas_phy_release, + .set_phy_speed = pqi_sas_phy_speed, + .smp_handler = pqi_sas_smp_handler, +}; diff --git a/drivers/scsi/smartpqi/smartpqi_sis.c b/drivers/scsi/smartpqi/smartpqi_sis.c new file mode 100644 index 000000000..26ea6b9d4 --- /dev/null +++ b/drivers/scsi/smartpqi/smartpqi_sis.c @@ -0,0 +1,438 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * driver for Microsemi PQI-based storage controllers + * Copyright (c) 2019-2020 Microchip Technology Inc. and its subsidiaries + * Copyright (c) 2016-2018 Microsemi Corporation + * Copyright (c) 2016 PMC-Sierra, Inc. + * + * Questions/Comments/Bugfixes to storagedev@microchip.com + * + */ + +#include <linux/module.h> +#include <linux/kernel.h> +#include <linux/delay.h> +#include <linux/pci.h> +#include <scsi/scsi_device.h> +#include <asm/unaligned.h> +#include "smartpqi.h" +#include "smartpqi_sis.h" + +/* legacy SIS interface commands */ +#define SIS_CMD_GET_ADAPTER_PROPERTIES 0x19 +#define SIS_CMD_INIT_BASE_STRUCT_ADDRESS 0x1b +#define SIS_CMD_GET_PQI_CAPABILITIES 0x3000 + +/* for submission of legacy SIS commands */ +#define SIS_REENABLE_SIS_MODE 0x1 +#define SIS_ENABLE_MSIX 0x40 +#define SIS_ENABLE_INTX 0x80 +#define SIS_SOFT_RESET 0x100 +#define SIS_CMD_READY 0x200 +#define SIS_TRIGGER_SHUTDOWN 0x800000 +#define SIS_PQI_RESET_QUIESCE 0x1000000 + +#define SIS_CMD_COMPLETE 0x1000 +#define SIS_CLEAR_CTRL_TO_HOST_DOORBELL 0x1000 + +#define SIS_CMD_STATUS_SUCCESS 0x1 +#define SIS_CMD_COMPLETE_TIMEOUT_SECS 30 +#define SIS_CMD_COMPLETE_POLL_INTERVAL_MSECS 10 + +/* used with SIS_CMD_GET_ADAPTER_PROPERTIES command */ +#define SIS_EXTENDED_PROPERTIES_SUPPORTED 0x800000 +#define SIS_SMARTARRAY_FEATURES_SUPPORTED 0x2 +#define SIS_PQI_MODE_SUPPORTED 0x4 +#define SIS_PQI_RESET_QUIESCE_SUPPORTED 0x8 +#define SIS_REQUIRED_EXTENDED_PROPERTIES \ + (SIS_SMARTARRAY_FEATURES_SUPPORTED | SIS_PQI_MODE_SUPPORTED) + +/* used with SIS_CMD_INIT_BASE_STRUCT_ADDRESS command */ +#define SIS_BASE_STRUCT_REVISION 9 +#define SIS_BASE_STRUCT_ALIGNMENT 16 + +#define SIS_CTRL_KERNEL_UP 0x80 +#define SIS_CTRL_KERNEL_PANIC 0x100 +#define SIS_CTRL_READY_TIMEOUT_SECS 180 +#define SIS_CTRL_READY_RESUME_TIMEOUT_SECS 90 +#define SIS_CTRL_READY_POLL_INTERVAL_MSECS 10 + +#pragma pack(1) + +/* for use with SIS_CMD_INIT_BASE_STRUCT_ADDRESS command */ +struct sis_base_struct { + __le32 revision; /* revision of this structure */ + __le32 flags; /* reserved */ + __le32 error_buffer_paddr_low; /* lower 32 bits of physical memory */ + /* buffer for PQI error response */ + /* data */ + __le32 error_buffer_paddr_high; /* upper 32 bits of physical */ + /* memory buffer for PQI */ + /* error response data */ + __le32 error_buffer_element_length; /* length of each PQI error */ + /* response buffer element */ + /* in bytes */ + __le32 error_buffer_num_elements; /* total number of PQI error */ + /* response buffers available */ +}; + +#pragma pack() + +static int sis_wait_for_ctrl_ready_with_timeout(struct pqi_ctrl_info *ctrl_info, + unsigned int timeout_secs) +{ + unsigned long timeout; + u32 status; + + timeout = (timeout_secs * PQI_HZ) + jiffies; + + while (1) { + status = readl(&ctrl_info->registers->sis_firmware_status); + if (status != ~0) { + if (status & SIS_CTRL_KERNEL_PANIC) { + dev_err(&ctrl_info->pci_dev->dev, + "controller is offline: status code 0x%x\n", + readl( + &ctrl_info->registers->sis_mailbox[7])); + return -ENODEV; + } + if (status & SIS_CTRL_KERNEL_UP) + break; + } + if (time_after(jiffies, timeout)) { + dev_err(&ctrl_info->pci_dev->dev, + "controller not ready after %u seconds\n", + timeout_secs); + return -ETIMEDOUT; + } + msleep(SIS_CTRL_READY_POLL_INTERVAL_MSECS); + } + + return 0; +} + +int sis_wait_for_ctrl_ready(struct pqi_ctrl_info *ctrl_info) +{ + return sis_wait_for_ctrl_ready_with_timeout(ctrl_info, + SIS_CTRL_READY_TIMEOUT_SECS); +} + +int sis_wait_for_ctrl_ready_resume(struct pqi_ctrl_info *ctrl_info) +{ + return sis_wait_for_ctrl_ready_with_timeout(ctrl_info, + SIS_CTRL_READY_RESUME_TIMEOUT_SECS); +} + +bool sis_is_firmware_running(struct pqi_ctrl_info *ctrl_info) +{ + bool running; + u32 status; + + status = readl(&ctrl_info->registers->sis_firmware_status); + + if (status & SIS_CTRL_KERNEL_PANIC) + running = false; + else + running = true; + + if (!running) + dev_err(&ctrl_info->pci_dev->dev, + "controller is offline: status code 0x%x\n", + readl(&ctrl_info->registers->sis_mailbox[7])); + + return running; +} + +bool sis_is_kernel_up(struct pqi_ctrl_info *ctrl_info) +{ + return readl(&ctrl_info->registers->sis_firmware_status) & + SIS_CTRL_KERNEL_UP; +} + +/* used for passing command parameters/results when issuing SIS commands */ +struct sis_sync_cmd_params { + u32 mailbox[6]; /* mailboxes 0-5 */ +}; + +static int sis_send_sync_cmd(struct pqi_ctrl_info *ctrl_info, + u32 cmd, struct sis_sync_cmd_params *params) +{ + struct pqi_ctrl_registers __iomem *registers; + unsigned int i; + unsigned long timeout; + u32 doorbell; + u32 cmd_status; + + registers = ctrl_info->registers; + + /* Write the command to mailbox 0. */ + writel(cmd, ®isters->sis_mailbox[0]); + + /* + * Write the command parameters to mailboxes 1-4 (mailbox 5 is not used + * when sending a command to the controller). + */ + for (i = 1; i <= 4; i++) + writel(params->mailbox[i], ®isters->sis_mailbox[i]); + + /* Clear the command doorbell. */ + writel(SIS_CLEAR_CTRL_TO_HOST_DOORBELL, + ®isters->sis_ctrl_to_host_doorbell_clear); + + /* Disable doorbell interrupts by masking all interrupts. */ + writel(~0, ®isters->sis_interrupt_mask); + + /* + * Force the completion of the interrupt mask register write before + * submitting the command. + */ + readl(®isters->sis_interrupt_mask); + + /* Submit the command to the controller. */ + writel(SIS_CMD_READY, ®isters->sis_host_to_ctrl_doorbell); + + /* + * Poll for command completion. Note that the call to msleep() is at + * the top of the loop in order to give the controller time to start + * processing the command before we start polling. + */ + timeout = (SIS_CMD_COMPLETE_TIMEOUT_SECS * PQI_HZ) + jiffies; + while (1) { + msleep(SIS_CMD_COMPLETE_POLL_INTERVAL_MSECS); + doorbell = readl(®isters->sis_ctrl_to_host_doorbell); + if (doorbell & SIS_CMD_COMPLETE) + break; + if (time_after(jiffies, timeout)) + return -ETIMEDOUT; + } + + /* Read the command status from mailbox 0. */ + cmd_status = readl(®isters->sis_mailbox[0]); + if (cmd_status != SIS_CMD_STATUS_SUCCESS) { + dev_err(&ctrl_info->pci_dev->dev, + "SIS command failed for command 0x%x: status = 0x%x\n", + cmd, cmd_status); + return -EINVAL; + } + + /* + * The command completed successfully, so save the command status and + * read the values returned in mailboxes 1-5. + */ + params->mailbox[0] = cmd_status; + for (i = 1; i < ARRAY_SIZE(params->mailbox); i++) + params->mailbox[i] = readl(®isters->sis_mailbox[i]); + + return 0; +} + +/* + * This function verifies that we are talking to a controller that speaks PQI. + */ + +int sis_get_ctrl_properties(struct pqi_ctrl_info *ctrl_info) +{ + int rc; + u32 properties; + u32 extended_properties; + struct sis_sync_cmd_params params; + + memset(¶ms, 0, sizeof(params)); + + rc = sis_send_sync_cmd(ctrl_info, SIS_CMD_GET_ADAPTER_PROPERTIES, + ¶ms); + if (rc) + return rc; + + properties = params.mailbox[1]; + + if (!(properties & SIS_EXTENDED_PROPERTIES_SUPPORTED)) + return -ENODEV; + + extended_properties = params.mailbox[4]; + + if ((extended_properties & SIS_REQUIRED_EXTENDED_PROPERTIES) != + SIS_REQUIRED_EXTENDED_PROPERTIES) + return -ENODEV; + + if (extended_properties & SIS_PQI_RESET_QUIESCE_SUPPORTED) + ctrl_info->pqi_reset_quiesce_supported = true; + + return 0; +} + +int sis_get_pqi_capabilities(struct pqi_ctrl_info *ctrl_info) +{ + int rc; + struct sis_sync_cmd_params params; + + memset(¶ms, 0, sizeof(params)); + + rc = sis_send_sync_cmd(ctrl_info, SIS_CMD_GET_PQI_CAPABILITIES, + ¶ms); + if (rc) + return rc; + + ctrl_info->max_sg_entries = params.mailbox[1]; + ctrl_info->max_transfer_size = params.mailbox[2]; + ctrl_info->max_outstanding_requests = params.mailbox[3]; + ctrl_info->config_table_offset = params.mailbox[4]; + ctrl_info->config_table_length = params.mailbox[5]; + + return 0; +} + +int sis_init_base_struct_addr(struct pqi_ctrl_info *ctrl_info) +{ + int rc; + void *base_struct_unaligned; + struct sis_base_struct *base_struct; + struct sis_sync_cmd_params params; + unsigned long error_buffer_paddr; + dma_addr_t bus_address; + + base_struct_unaligned = kzalloc(sizeof(*base_struct) + + SIS_BASE_STRUCT_ALIGNMENT - 1, GFP_KERNEL); + if (!base_struct_unaligned) + return -ENOMEM; + + base_struct = PTR_ALIGN(base_struct_unaligned, + SIS_BASE_STRUCT_ALIGNMENT); + error_buffer_paddr = (unsigned long)ctrl_info->error_buffer_dma_handle; + + put_unaligned_le32(SIS_BASE_STRUCT_REVISION, &base_struct->revision); + put_unaligned_le32(lower_32_bits(error_buffer_paddr), + &base_struct->error_buffer_paddr_low); + put_unaligned_le32(upper_32_bits(error_buffer_paddr), + &base_struct->error_buffer_paddr_high); + put_unaligned_le32(PQI_ERROR_BUFFER_ELEMENT_LENGTH, + &base_struct->error_buffer_element_length); + put_unaligned_le32(ctrl_info->max_io_slots, + &base_struct->error_buffer_num_elements); + + bus_address = dma_map_single(&ctrl_info->pci_dev->dev, base_struct, + sizeof(*base_struct), DMA_TO_DEVICE); + if (dma_mapping_error(&ctrl_info->pci_dev->dev, bus_address)) { + rc = -ENOMEM; + goto out; + } + + memset(¶ms, 0, sizeof(params)); + params.mailbox[1] = lower_32_bits((u64)bus_address); + params.mailbox[2] = upper_32_bits((u64)bus_address); + params.mailbox[3] = sizeof(*base_struct); + + rc = sis_send_sync_cmd(ctrl_info, SIS_CMD_INIT_BASE_STRUCT_ADDRESS, + ¶ms); + + dma_unmap_single(&ctrl_info->pci_dev->dev, bus_address, + sizeof(*base_struct), DMA_TO_DEVICE); +out: + kfree(base_struct_unaligned); + + return rc; +} + +#define SIS_DOORBELL_BIT_CLEAR_TIMEOUT_SECS 30 + +static int sis_wait_for_doorbell_bit_to_clear( + struct pqi_ctrl_info *ctrl_info, u32 bit) +{ + int rc = 0; + u32 doorbell_register; + unsigned long timeout; + + timeout = (SIS_DOORBELL_BIT_CLEAR_TIMEOUT_SECS * PQI_HZ) + jiffies; + + while (1) { + doorbell_register = + readl(&ctrl_info->registers->sis_host_to_ctrl_doorbell); + if ((doorbell_register & bit) == 0) + break; + if (readl(&ctrl_info->registers->sis_firmware_status) & + SIS_CTRL_KERNEL_PANIC) { + rc = -ENODEV; + break; + } + if (time_after(jiffies, timeout)) { + dev_err(&ctrl_info->pci_dev->dev, + "doorbell register bit 0x%x not cleared\n", + bit); + rc = -ETIMEDOUT; + break; + } + usleep_range(1000, 2000); + } + + return rc; +} + +static inline int sis_set_doorbell_bit(struct pqi_ctrl_info *ctrl_info, u32 bit) +{ + writel(bit, &ctrl_info->registers->sis_host_to_ctrl_doorbell); + + return sis_wait_for_doorbell_bit_to_clear(ctrl_info, bit); +} + +void sis_enable_msix(struct pqi_ctrl_info *ctrl_info) +{ + sis_set_doorbell_bit(ctrl_info, SIS_ENABLE_MSIX); +} + +void sis_enable_intx(struct pqi_ctrl_info *ctrl_info) +{ + sis_set_doorbell_bit(ctrl_info, SIS_ENABLE_INTX); +} + +void sis_shutdown_ctrl(struct pqi_ctrl_info *ctrl_info) +{ + if (readl(&ctrl_info->registers->sis_firmware_status) & + SIS_CTRL_KERNEL_PANIC) + return; + + writel(SIS_TRIGGER_SHUTDOWN, + &ctrl_info->registers->sis_host_to_ctrl_doorbell); +} + +int sis_pqi_reset_quiesce(struct pqi_ctrl_info *ctrl_info) +{ + return sis_set_doorbell_bit(ctrl_info, SIS_PQI_RESET_QUIESCE); +} + +int sis_reenable_sis_mode(struct pqi_ctrl_info *ctrl_info) +{ + return sis_set_doorbell_bit(ctrl_info, SIS_REENABLE_SIS_MODE); +} + +void sis_write_driver_scratch(struct pqi_ctrl_info *ctrl_info, u32 value) +{ + writel(value, &ctrl_info->registers->sis_driver_scratch); +} + +u32 sis_read_driver_scratch(struct pqi_ctrl_info *ctrl_info) +{ + return readl(&ctrl_info->registers->sis_driver_scratch); +} + +void sis_soft_reset(struct pqi_ctrl_info *ctrl_info) +{ + writel(SIS_SOFT_RESET, + &ctrl_info->registers->sis_host_to_ctrl_doorbell); +} + +static void __attribute__((unused)) verify_structures(void) +{ + BUILD_BUG_ON(offsetof(struct sis_base_struct, + revision) != 0x0); + BUILD_BUG_ON(offsetof(struct sis_base_struct, + flags) != 0x4); + BUILD_BUG_ON(offsetof(struct sis_base_struct, + error_buffer_paddr_low) != 0x8); + BUILD_BUG_ON(offsetof(struct sis_base_struct, + error_buffer_paddr_high) != 0xc); + BUILD_BUG_ON(offsetof(struct sis_base_struct, + error_buffer_element_length) != 0x10); + BUILD_BUG_ON(offsetof(struct sis_base_struct, + error_buffer_num_elements) != 0x14); + BUILD_BUG_ON(sizeof(struct sis_base_struct) != 0x18); +} diff --git a/drivers/scsi/smartpqi/smartpqi_sis.h b/drivers/scsi/smartpqi/smartpqi_sis.h new file mode 100644 index 000000000..878d34ca6 --- /dev/null +++ b/drivers/scsi/smartpqi/smartpqi_sis.h @@ -0,0 +1,31 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * driver for Microsemi PQI-based storage controllers + * Copyright (c) 2019-2020 Microchip Technology Inc. and its subsidiaries + * Copyright (c) 2016-2018 Microsemi Corporation + * Copyright (c) 2016 PMC-Sierra, Inc. + * + * Questions/Comments/Bugfixes to storagedev@microchip.com + * + */ + +#if !defined(_SMARTPQI_SIS_H) +#define _SMARTPQI_SIS_H + +int sis_wait_for_ctrl_ready(struct pqi_ctrl_info *ctrl_info); +int sis_wait_for_ctrl_ready_resume(struct pqi_ctrl_info *ctrl_info); +bool sis_is_firmware_running(struct pqi_ctrl_info *ctrl_info); +bool sis_is_kernel_up(struct pqi_ctrl_info *ctrl_info); +int sis_get_ctrl_properties(struct pqi_ctrl_info *ctrl_info); +int sis_get_pqi_capabilities(struct pqi_ctrl_info *ctrl_info); +int sis_init_base_struct_addr(struct pqi_ctrl_info *ctrl_info); +void sis_enable_msix(struct pqi_ctrl_info *ctrl_info); +void sis_enable_intx(struct pqi_ctrl_info *ctrl_info); +void sis_shutdown_ctrl(struct pqi_ctrl_info *ctrl_info); +int sis_pqi_reset_quiesce(struct pqi_ctrl_info *ctrl_info); +int sis_reenable_sis_mode(struct pqi_ctrl_info *ctrl_info); +void sis_write_driver_scratch(struct pqi_ctrl_info *ctrl_info, u32 value); +u32 sis_read_driver_scratch(struct pqi_ctrl_info *ctrl_info); +void sis_soft_reset(struct pqi_ctrl_info *ctrl_info); + +#endif /* _SMARTPQI_SIS_H */ |