diff options
Diffstat (limited to 'drivers/scsi/smartpqi/smartpqi_sas_transport.c')
| -rw-r--r-- | drivers/scsi/smartpqi/smartpqi_sas_transport.c | 574 |
1 files changed, 574 insertions, 0 deletions
diff --git a/drivers/scsi/smartpqi/smartpqi_sas_transport.c b/drivers/scsi/smartpqi/smartpqi_sas_transport.c new file mode 100644 index 000000000..13e8c5390 --- /dev/null +++ b/drivers/scsi/smartpqi/smartpqi_sas_transport.c @@ -0,0 +1,574 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * driver for Microchip PQI-based storage controllers + * Copyright (c) 2019-2022 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_ALL; + identify->target_port_protocols = SAS_PROTOCOL_ALL; + 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; + + identify->initiator_port_protocols = SAS_PROTOCOL_ALL; + identify->target_port_protocols = SAS_PROTOCOL_STP; + + if (pqi_sas_port->device) { + identify->phy_identifier = pqi_sas_port->device->phy_id; + switch (pqi_sas_port->device->device_type) { + case SA_DEVICE_TYPE_SAS: + case SA_DEVICE_TYPE_SES: + case SA_DEVICE_TYPE_NVME: + identify->target_port_protocols = SAS_PROTOCOL_SSP; + break; + case SA_DEVICE_TYPE_EXPANDER_SMP: + identify->target_port_protocols = SAS_PROTOCOL_SMP; + break; + case SA_DEVICE_TYPE_SATA: + default: + break; + } + } + + 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[8]); + 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[8]); + 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[8]); + 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); +} +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, +}; |