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Diffstat (limited to 'drivers/scsi/smartpqi/smartpqi_sas_transport.c')
-rw-r--r--drivers/scsi/smartpqi/smartpqi_sas_transport.c574
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,
+ &parameters->destination_sas_address);
+
+ if (req_size > SMP_CRC_FIELD_LENGTH)
+ req_size -= SMP_CRC_FIELD_LENGTH;
+
+ put_unaligned_le32(req_size, &parameters->request_length);
+ put_unaligned_le32(resp_size, &parameters->response_length);
+
+ sg_copy_to_buffer(job->request_payload.sg_list,
+ job->reply_payload.sg_cnt, &parameters->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,
+};