--- /dev/null
+/*
+ * driver for Microsemi PQI-based storage controllers
+ * Copyright (c) 2016 Microsemi Corporation
+ * Copyright (c) 2016 PMC-Sierra, Inc.
+ *
+ * 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, GOOD TITLE or
+ * NON INFRINGEMENT. See the GNU General Public License for more details.
+ *
+ * Questions/Comments/Bugfixes to esc.storagedev@microsemi.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/cciss_ioctl.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 "0.9.9-100"
+#define DRIVER_MAJOR 0
+#define DRIVER_MINOR 9
+#define DRIVER_RELEASE 9
+#define DRIVER_REVISION 100
+
+#define DRIVER_NAME "Microsemi PQI Driver (v" DRIVER_VERSION ")"
+#define DRIVER_NAME_SHORT "smartpqi"
+
+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");
+
+#define PQI_ENABLE_MULTI_QUEUE_SUPPORT 0
+
+static char *hpe_branded_controller = "HPE Smart Array Controller";
+static char *microsemi_branded_controller = "Microsemi Smart Family Controller";
+
+static void pqi_take_ctrl_offline(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);
+
+/* 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);
+
+static int pqi_disable_device_id_wildcards;
+module_param_named(disable_device_id_wildcards,
+ pqi_disable_device_id_wildcards, int, S_IRUGO | S_IWUSR);
+MODULE_PARM_DESC(disable_device_id_wildcards,
+ "Disable device ID wildcards.");
+
+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 "";
+}
+
+#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)
+{
+ scmd->scsi_done(scmd);
+}
+
+static inline bool pqi_scsi3addr_equal(u8 *scsi3addr1, u8 *scsi3addr2)
+{
+ return memcmp(scsi3addr1, scsi3addr2, 8) == 0;
+}
+
+static inline struct pqi_ctrl_info *shost_to_hba(struct Scsi_Host *shost)
+{
+ void *hostdata = shost_priv(shost);
+
+ return *((struct pqi_ctrl_info **)hostdata);
+}
+
+static inline bool pqi_is_logical_device(struct pqi_scsi_dev *device)
+{
+ return !device->is_physical_device;
+}
+
+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);
+}
+
+#define PQI_RESCAN_WORK_INTERVAL (10 * HZ)
+
+static inline void pqi_schedule_rescan_worker(struct pqi_ctrl_info *ctrl_info)
+{
+ schedule_delayed_work(&ctrl_info->rescan_work,
+ PQI_RESCAN_WORK_INTERVAL);
+}
+
+static int pqi_map_single(struct pci_dev *pci_dev,
+ struct pqi_sg_descriptor *sg_descriptor, void *buffer,
+ size_t buffer_length, int data_direction)
+{
+ dma_addr_t bus_address;
+
+ if (!buffer || buffer_length == 0 || data_direction == PCI_DMA_NONE)
+ return 0;
+
+ bus_address = pci_map_single(pci_dev, buffer, buffer_length,
+ data_direction);
+ if (pci_dma_mapping_error(pci_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,
+ int data_direction)
+{
+ int i;
+
+ if (data_direction == PCI_DMA_NONE)
+ return;
+
+ for (i = 0; i < num_descriptors; i++)
+ pci_unmap_single(pci_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, int *pci_direction)
+{
+ u8 *cdb;
+ int pci_dir;
+
+ 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)buffer_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_EXTENDED;
+ else
+ cdb[1] = CISS_REPORT_LOG_EXTENDED;
+ put_unaligned_be32(buffer_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(buffer_length, &cdb[6]);
+ break;
+ case SA_CACHE_FLUSH:
+ request->data_direction = SOP_WRITE_FLAG;
+ cdb[0] = BMIC_WRITE;
+ cdb[6] = BMIC_CACHE_FLUSH;
+ put_unaligned_be16(buffer_length, &cdb[7]);
+ break;
+ case BMIC_IDENTIFY_CONTROLLER:
+ case BMIC_IDENTIFY_PHYSICAL_DEVICE:
+ request->data_direction = SOP_READ_FLAG;
+ cdb[0] = BMIC_READ;
+ cdb[6] = cmd;
+ put_unaligned_be16(buffer_length, &cdb[7]);
+ break;
+ case BMIC_WRITE_HOST_WELLNESS:
+ request->data_direction = SOP_WRITE_FLAG;
+ cdb[0] = BMIC_WRITE;
+ cdb[6] = cmd;
+ put_unaligned_be16(buffer_length, &cdb[7]);
+ break;
+ default:
+ dev_err(&ctrl_info->pci_dev->dev, "unknown command 0x%c\n",
+ cmd);
+ WARN_ON(cmd);
+ break;
+ }
+
+ switch (request->data_direction) {
+ case SOP_READ_FLAG:
+ pci_dir = PCI_DMA_FROMDEVICE;
+ break;
+ case SOP_WRITE_FLAG:
+ pci_dir = PCI_DMA_TODEVICE;
+ break;
+ case SOP_NO_DIRECTION_FLAG:
+ pci_dir = PCI_DMA_NONE;
+ break;
+ default:
+ pci_dir = PCI_DMA_BIDIRECTIONAL;
+ break;
+ }
+
+ *pci_direction = pci_dir;
+
+ return pqi_map_single(ctrl_info->pci_dev, &request->sg_descriptors[0],
+ buffer, buffer_length, pci_dir);
+}
+
+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;
+
+ io_request->scmd = NULL;
+ io_request->status = 0;
+ io_request->error_info = NULL;
+
+ return io_request;
+}
+
+static void pqi_free_io_request(struct pqi_io_request *io_request)
+{
+ atomic_dec(&io_request->refcount);
+}
+
+static int pqi_identify_controller(struct pqi_ctrl_info *ctrl_info,
+ struct bmic_identify_controller *buffer)
+{
+ int rc;
+ int pci_direction;
+ struct pqi_raid_path_request request;
+
+ rc = pqi_build_raid_path_request(ctrl_info, &request,
+ BMIC_IDENTIFY_CONTROLLER, RAID_CTLR_LUNID, buffer,
+ sizeof(*buffer), 0, &pci_direction);
+ if (rc)
+ return rc;
+
+ 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,
+ pci_direction);
+
+ return rc;
+}
+
+static int pqi_scsi_inquiry(struct pqi_ctrl_info *ctrl_info,
+ u8 *scsi3addr, u16 vpd_page, void *buffer, size_t buffer_length)
+{
+ int rc;
+ int pci_direction;
+ struct pqi_raid_path_request request;
+
+ rc = pqi_build_raid_path_request(ctrl_info, &request,
+ INQUIRY, scsi3addr, buffer, buffer_length, vpd_page,
+ &pci_direction);
+ if (rc)
+ return rc;
+
+ 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,
+ pci_direction);
+
+ return rc;
+}
+
+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;
+ int pci_direction;
+ 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, &pci_direction);
+ 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,
+ pci_direction);
+
+ return rc;
+}
+
+#define SA_CACHE_FLUSH_BUFFER_LENGTH 4
+#define PQI_FLUSH_CACHE_TIMEOUT (30 * 1000)
+
+static int pqi_flush_cache(struct pqi_ctrl_info *ctrl_info)
+{
+ int rc;
+ struct pqi_raid_path_request request;
+ int pci_direction;
+ u8 *buffer;
+
+ /*
+ * Don't bother trying to flush the cache if the controller is
+ * locked up.
+ */
+ if (pqi_ctrl_offline(ctrl_info))
+ return -ENXIO;
+
+ buffer = kzalloc(SA_CACHE_FLUSH_BUFFER_LENGTH, GFP_KERNEL);
+ if (!buffer)
+ return -ENOMEM;
+
+ rc = pqi_build_raid_path_request(ctrl_info, &request,
+ SA_CACHE_FLUSH, RAID_CTLR_LUNID, buffer,
+ SA_CACHE_FLUSH_BUFFER_LENGTH, 0, &pci_direction);
+ if (rc)
+ goto out;
+
+ rc = pqi_submit_raid_request_synchronous(ctrl_info, &request.header,
+ 0, NULL, PQI_FLUSH_CACHE_TIMEOUT);
+
+ pqi_pci_unmap(ctrl_info->pci_dev, request.sg_descriptors, 1,
+ pci_direction);
+
+out:
+ kfree(buffer);
+
+ return rc;
+}
+
+static int pqi_write_host_wellness(struct pqi_ctrl_info *ctrl_info,
+ void *buffer, size_t buffer_length)
+{
+ int rc;
+ struct pqi_raid_path_request request;
+ int pci_direction;
+
+ rc = pqi_build_raid_path_request(ctrl_info, &request,
+ BMIC_WRITE_HOST_WELLNESS, RAID_CTLR_LUNID, buffer,
+ buffer_length, 0, &pci_direction);
+ if (rc)
+ return rc;
+
+ 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,
+ pci_direction);
+
+ return rc;
+}
+
+#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 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, DRIVER_VERSION,
+ sizeof(buffer->driver_version) - 1);
+ buffer->driver_version[sizeof(buffer->driver_version) - 1] = '\0';
+ 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 timeval time;
+ struct rtc_time 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);
+
+ do_gettimeofday(&time);
+ local_time = time.tv_sec - (sys_tz.tz_minuteswest * 60);
+ rtc_time64_to_tm(local_time, &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 * 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 (!ctrl_info) {
+ printk("%s: NULL controller pointer.\n", __func__);
+ 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, 120);
+}
+
+static int pqi_report_luns(struct pqi_ctrl_info *ctrl_info, u8 cmd,
+ void *buffer, size_t buffer_length)
+{
+ int rc;
+ int pci_direction;
+ struct pqi_raid_path_request request;
+
+ rc = pqi_build_raid_path_request(ctrl_info, &request,
+ cmd, RAID_CTLR_LUNID, buffer, buffer_length, 0, &pci_direction);
+ if (rc)
+ return rc;
+
+ 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,
+ pci_direction);
+
+ return rc;
+}
+
+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;
+
+ 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)) {
+ pqi_set_bus_target_lun(device, PQI_RAID_VOLUME_BUS, 0,
+ lunid & 0x3fff);
+ 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;
+ unsigned int num_phys_disks;
+ unsigned int num_raid_map_entries;
+
+ 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 (raid_map_size > sizeof(*raid_map)) {
+ err_msg = "RAID map too large";
+ goto bad_raid_map;
+ }
+
+ num_phys_disks = get_unaligned_le16(&raid_map->layout_map_count) *
+ (get_unaligned_le16(&raid_map->data_disks_per_row) +
+ get_unaligned_le16(&raid_map->metadata_disks_per_row));
+ num_raid_map_entries = num_phys_disks *
+ get_unaligned_le16(&raid_map->row_cnt);
+
+ if (num_raid_map_entries > RAID_MAP_MAX_ENTRIES) {
+ err_msg = "invalid number of map entries in RAID map";
+ 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, "%s\n", err_msg);
+
+ return -EINVAL;
+}
+
+static int pqi_get_raid_map(struct pqi_ctrl_info *ctrl_info,
+ struct pqi_scsi_dev *device)
+{
+ int rc;
+ int pci_direction;
+ struct pqi_raid_path_request request;
+ struct raid_map *raid_map;
+
+ raid_map = kmalloc(sizeof(*raid_map), GFP_KERNEL);
+ if (!raid_map)
+ return -ENOMEM;
+
+ rc = pqi_build_raid_path_request(ctrl_info, &request,
+ CISS_GET_RAID_MAP, device->scsi3addr, raid_map,
+ sizeof(*raid_map), 0, &pci_direction);
+ if (rc)
+ goto error;
+
+ 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,
+ pci_direction);
+
+ if (rc)
+ 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_offload_status(struct pqi_ctrl_info *ctrl_info,
+ struct pqi_scsi_dev *device)
+{
+ int rc;
+ u8 *buffer;
+ u8 offload_status;
+
+ buffer = kmalloc(64, GFP_KERNEL);
+ if (!buffer)
+ return;
+
+ rc = pqi_scsi_inquiry(ctrl_info, device->scsi3addr,
+ VPD_PAGE | CISS_VPD_LV_OFFLOAD_STATUS, buffer, 64);
+ if (rc)
+ goto out;
+
+#define OFFLOAD_STATUS_BYTE 4
+#define OFFLOAD_CONFIGURED_BIT 0x1
+#define OFFLOAD_ENABLED_BIT 0x2
+
+ offload_status = buffer[OFFLOAD_STATUS_BYTE];
+ device->offload_configured =
+ !!(offload_status & OFFLOAD_CONFIGURED_BIT);
+ if (device->offload_configured) {
+ device->offload_enabled_pending =
+ !!(offload_status & OFFLOAD_ENABLED_BIT);
+ if (pqi_get_raid_map(ctrl_info, device))
+ device->offload_enabled_pending = false;
+ }
+
+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;
+
+ 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_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 (pqi_is_logical_device(device) && device->devtype == TYPE_DISK) {
+ pqi_get_raid_level(ctrl_info, device);
+ pqi_get_offload_status(ctrl_info, device);
+ pqi_get_volume_status(ctrl_info, device);
+ }
+
+out:
+ kfree(buffer);
+
+ return rc;
+}
+
+static void pqi_get_physical_disk_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;
+ }
+
+ device->queue_depth =
+ get_unaligned_le16(&id_phys->current_queue_depth_limit);
+ device->device_type = id_phys->device_type;
+ 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;
+}
+
+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 =
+ "Encrypted volume inaccessible - disabled on ctrl";
+ 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 struct pqi_scsi_dev *pqi_find_disk_by_aio_handle(
+ struct pqi_ctrl_info *ctrl_info, u32 aio_handle)
+{
+ struct pqi_scsi_dev *device;
+
+ list_for_each_entry(device, &ctrl_info->scsi_device_list,
+ scsi_device_list_entry) {
+ if (device->devtype != TYPE_DISK && device->devtype != TYPE_ZBC)
+ continue;
+ if (pqi_is_logical_device(device))
+ continue;
+ if (device->aio_handle == aio_handle)
+ return device;
+ }
+
+ return NULL;
+}
+
+static void pqi_update_logical_drive_queue_depth(
+ struct pqi_ctrl_info *ctrl_info, struct pqi_scsi_dev *logical_drive)
+{
+ unsigned int i;
+ struct raid_map *raid_map;
+ struct raid_map_disk_data *disk_data;
+ struct pqi_scsi_dev *phys_disk;
+ unsigned int num_phys_disks;
+ unsigned int num_raid_map_entries;
+ unsigned int queue_depth;
+
+ logical_drive->queue_depth = PQI_LOGICAL_DRIVE_DEFAULT_MAX_QUEUE_DEPTH;
+
+ raid_map = logical_drive->raid_map;
+ if (!raid_map)
+ return;
+
+ disk_data = raid_map->disk_data;
+ num_phys_disks = get_unaligned_le16(&raid_map->layout_map_count) *
+ (get_unaligned_le16(&raid_map->data_disks_per_row) +
+ get_unaligned_le16(&raid_map->metadata_disks_per_row));
+ num_raid_map_entries = num_phys_disks *
+ get_unaligned_le16(&raid_map->row_cnt);
+
+ queue_depth = 0;
+ for (i = 0; i < num_raid_map_entries; i++) {
+ phys_disk = pqi_find_disk_by_aio_handle(ctrl_info,
+ disk_data[i].aio_handle);
+
+ if (!phys_disk) {
+ dev_warn(&ctrl_info->pci_dev->dev,
+ "failed to find physical disk for logical drive %016llx\n",
+ get_unaligned_be64(logical_drive->scsi3addr));
+ logical_drive->offload_enabled = false;
+ logical_drive->offload_enabled_pending = false;
+ kfree(raid_map);
+ logical_drive->raid_map = NULL;
+ return;
+ }
+
+ queue_depth += phys_disk->queue_depth;
+ }
+
+ logical_drive->queue_depth = queue_depth;
+}
+
+static void pqi_update_all_logical_drive_queue_depths(
+ struct pqi_ctrl_info *ctrl_info)
+{
+ struct pqi_scsi_dev *device;
+
+ list_for_each_entry(device, &ctrl_info->scsi_device_list,
+ scsi_device_list_entry) {
+ if (device->devtype != TYPE_DISK && device->devtype != TYPE_ZBC)
+ continue;
+ if (!pqi_is_logical_device(device))
+ continue;
+ pqi_update_logical_drive_queue_depth(ctrl_info, device);
+ }
+}
+
+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;
+}
+
+static inline void pqi_remove_device(struct pqi_ctrl_info *ctrl_info,
+ struct pqi_scsi_dev *device)
+{
+ 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 void pqi_dev_info(struct pqi_ctrl_info *ctrl_info,
+ char *action, struct pqi_scsi_dev *device)
+{
+ dev_info(&ctrl_info->pci_dev->dev,
+ "%s scsi %d:%d:%d:%d: %s %.8s %.16s %-12s SSDSmartPathCap%c En%c Exp%c qd=%d\n",
+ action,
+ ctrl_info->scsi_host->host_no,
+ device->bus,
+ device->target,
+ device->lun,
+ scsi_device_type(device->devtype),
+ device->vendor,
+ device->model,
+ pqi_raid_level_to_string(device->raid_level),
+ device->offload_configured ? '+' : '-',
+ device->offload_enabled_pending ? '+' : '-',
+ device->expose_device ? '+' : '-',
+ device->queue_depth);
+}
+
+/* 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;
+ }
+
+ /* By definition, the scsi3addr and wwid fields are already the same. */
+
+ existing_device->is_physical_device = new_device->is_physical_device;
+ existing_device->expose_device = new_device->expose_device;
+ existing_device->no_uld_attach = new_device->no_uld_attach;
+ 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;
+ 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_configured = new_device->offload_configured;
+ existing_device->offload_enabled = false;
+ existing_device->offload_enabled_pending =
+ new_device->offload_enabled_pending;
+ existing_device->offload_to_mirror = 0;
+ kfree(existing_device->raid_map);
+ existing_device->raid_map = new_device->raid_map;
+
+ /* 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 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;
+ struct list_head add_list;
+ struct list_head delete_list;
+
+ INIT_LIST_HEAD(&add_list);
+ INIT_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;
+ default:
+ WARN_ON(find_result);
+ 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(&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;
+ }
+
+ pqi_update_all_logical_drive_queue_depths(ctrl_info);
+
+ list_for_each_entry(device, &ctrl_info->scsi_device_list,
+ scsi_device_list_entry)
+ device->offload_enabled =
+ device->offload_enabled_pending;
+
+ spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
+
+ /* Remove all devices that have gone away. */
+ list_for_each_entry_safe(device, next, &delete_list,
+ delete_list_entry) {
+ if (device->sdev)
+ pqi_remove_device(ctrl_info, device);
+ if (device->volume_offline) {
+ pqi_dev_info(ctrl_info, "offline", device);
+ pqi_show_volume_status(ctrl_info, device);
+ } else {
+ pqi_dev_info(ctrl_info, "removed", device);
+ }
+ list_del(&device->delete_list_entry);
+ 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 && device->queue_depth !=
+ device->advertised_queue_depth) {
+ device->advertised_queue_depth = device->queue_depth;
+ scsi_change_queue_depth(device->sdev,
+ device->advertised_queue_depth);
+ }
+ }
+
+ /* Expose any new devices. */
+ list_for_each_entry_safe(device, next, &add_list, add_list_entry) {
+ if (device->expose_device && !device->sdev) {
+ rc = pqi_add_device(ctrl_info, device);
+ if (rc) {
+ 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);
+ continue;
+ }
+ }
+ pqi_dev_info(ctrl_info, "added", device);
+ }
+}
+
+static bool pqi_is_supported_device(struct pqi_scsi_dev *device)
+{
+ bool is_supported = false;
+
+ switch (device->devtype) {
+ case TYPE_DISK:
+ case TYPE_ZBC:
+ case TYPE_TAPE:
+ case TYPE_MEDIUM_CHANGER:
+ case TYPE_ENCLOSURE:
+ is_supported = true;
+ break;
+ case TYPE_RAID:
+ /*
+ * 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, MSA500
+ * or similar), we don't support it.
+ */
+ if (pqi_is_hba_lunid(device->scsi3addr))
+ is_supported = true;
+ break;
+ }
+
+ return is_supported;
+}
+
+static inline bool pqi_skip_device(u8 *scsi3addr,
+ struct report_phys_lun_extended_entry *phys_lun_ext_entry)
+{
+ u8 device_flags;
+
+ if (!MASKED_DEVICE(scsi3addr))
+ return false;
+
+ /* The device is masked. */
+
+ device_flags = phys_lun_ext_entry->device_flags;
+
+ if (device_flags & REPORT_PHYS_LUN_DEV_FLAG_NON_DISK) {
+ /*
+ * It's a non-disk device. We ignore all devices of this type
+ * when they're masked.
+ */
+ return true;
+ }
+
+ return false;
+}
+
+static inline bool pqi_expose_device(struct pqi_scsi_dev *device)
+{
+ /* Expose all devices except for physical devices that are masked. */
+ if (device->is_physical_device && MASKED_DEVICE(device->scsi3addr))
+ return false;
+
+ return true;
+}
+
+static int pqi_update_scsi_devices(struct pqi_ctrl_info *ctrl_info)
+{
+ int i;
+ int rc;
+ struct 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;
+ static char *out_of_memory_msg =
+ "out of memory, device discovery stopped";
+
+ INIT_LIST_HEAD(&new_device_list_head);
+
+ 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;
+ }
+ }
+
+ num_new_devices = num_physicals + num_logicals;
+
+ new_device_list = kmalloc(sizeof(*new_device_list) *
+ num_new_devices, 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;
+
+ for (i = 0; i < num_new_devices; i++) {
+
+ if (i < num_physicals) {
+ is_physical_device = true;
+ phys_lun_ext_entry = &physdev_list->lun_entries[i];
+ 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[i - num_physicals];
+ scsi3addr = log_lun_ext_entry->lunid;
+ }
+
+ if (is_physical_device &&
+ pqi_skip_device(scsi3addr, phys_lun_ext_entry))
+ 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;
+ device->raid_level = SA_RAID_UNKNOWN;
+
+ /* Gather information about the device. */
+ rc = pqi_get_device_info(ctrl_info, device);
+ if (rc == -ENOMEM) {
+ dev_warn(&ctrl_info->pci_dev->dev, "%s\n",
+ out_of_memory_msg);
+ goto out;
+ }
+ if (rc) {
+ dev_warn(&ctrl_info->pci_dev->dev,
+ "obtaining device info failed, skipping device %016llx\n",
+ get_unaligned_be64(device->scsi3addr));
+ rc = 0;
+ continue;
+ }
+
+ if (!pqi_is_supported_device(device))
+ continue;
+
+ pqi_assign_bus_target_lun(device);
+
+ device->expose_device = pqi_expose_device(device);
+
+ if (device->is_physical_device) {
+ device->wwid = phys_lun_ext_entry->wwid;
+ if ((phys_lun_ext_entry->device_flags &
+ REPORT_PHYS_LUN_DEV_FLAG_AIO_ENABLED) &&
+ phys_lun_ext_entry->aio_handle)
+ device->aio_enabled = true;
+ } else {
+ memcpy(device->volume_id, log_lun_ext_entry->volume_id,
+ sizeof(device->volume_id));
+ }
+
+ switch (device->devtype) {
+ case TYPE_DISK:
+ case TYPE_ZBC:
+ case TYPE_ENCLOSURE:
+ if (device->is_physical_device) {
+ device->sas_address =
+ get_unaligned_be64(&device->wwid);
+ if (device->devtype == TYPE_DISK ||
+ device->devtype == TYPE_ZBC) {
+ device->aio_handle =
+ phys_lun_ext_entry->aio_handle;
+ pqi_get_physical_disk_info(ctrl_info,
+ device, id_phys);
+ }
+ }
+ break;
+ }
+
+ 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 void pqi_remove_all_scsi_devices(struct pqi_ctrl_info *ctrl_info)
+{
+ unsigned long flags;
+ struct pqi_scsi_dev *device;
+ struct pqi_scsi_dev *next;
+
+ spin_lock_irqsave(&ctrl_info->scsi_device_list_lock, flags);
+
+ list_for_each_entry_safe(device, next, &ctrl_info->scsi_device_list,
+ scsi_device_list_entry) {
+ if (device->sdev)
+ pqi_remove_device(ctrl_info, device);
+ list_del(&device->scsi_device_list_entry);
+ pqi_free_device(device);
+ }
+
+ spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
+}
+
+static int pqi_scan_scsi_devices(struct pqi_ctrl_info *ctrl_info)
+{
+ int rc;
+
+ if (pqi_ctrl_offline(ctrl_info))
+ return -ENXIO;
+
+ mutex_lock(&ctrl_info->scan_mutex);
+
+ rc = pqi_update_scsi_devices(ctrl_info);
+ if (rc)
+ pqi_schedule_rescan_worker(ctrl_info);
+
+ mutex_unlock(&ctrl_info->scan_mutex);
+
+ return rc;
+}
+
+static void pqi_scan_start(struct Scsi_Host *shost)
+{
+ pqi_scan_scsi_devices(shost_to_hba(shost));
+}
+
+/* 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 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 offload RAID 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;
+ /* fall through */
+ case READ_6:
+ first_block = (u64)get_unaligned_be16(&scmd->cmnd[2]);
+ block_cnt = (u32)scmd->cmnd[4];
+ if (block_cnt == 0)
+ block_cnt = 256;
+ break;
+ case WRITE_10:
+ is_write = true;
+ /* fall through */
+ 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;
+ /* fall through */
+ 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;
+ /* fall through */
+ 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;
+ WARN_ON(offload_to_mirror >= layout_map_count);
+ 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;
+ }
+
+ if (unlikely(map_index >= RAID_MAP_MAX_ENTRIES))
+ return PQI_RAID_BYPASS_INELIGIBLE;
+
+ 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);
+}
+
+#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 * 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->offload_enabled = false;
+}
+
+static inline void pqi_take_device_offline(struct scsi_device *sdev)
+{
+ struct pqi_ctrl_info *ctrl_info;
+
+ if (scsi_device_online(sdev)) {
+ scsi_device_set_state(sdev, SDEV_OFFLINE);
+ ctrl_info = shost_to_hba(sdev->host);
+ schedule_delayed_work(&ctrl_info->rescan_work, 0);
+ }
+}
+
+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;
+
+ if (error_info->data_out_result == 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;
+ }
+
+ 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 &&
+ sshdr.ascq == 0x1) {
+ pqi_take_device_offline(scmd->device);
+ host_byte = DID_NO_CONNECT;
+ }
+
+ 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:
+ device_offline = true;
+ pqi_take_device_offline(scmd->device);
+ 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_TASK_MANAGEMENT_FUNCTION_COMPLETE:
+ case SOP_TASK_MANAGEMENT_FUNCTION_SUCCEEDED:
+ rc = 0;
+ break;
+ default:
+ rc = -EIO;
+ break;
+ }
+
+ return rc;
+}
+
+static unsigned int pqi_process_io_intr(struct pqi_ctrl_info *ctrl_info,
+ struct pqi_queue_group *queue_group)
+{
+ unsigned 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 = *queue_group->oq_pi;
+ 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);
+ WARN_ON(request_id >= ctrl_info->max_io_slots);
+
+ io_request = &ctrl_info->io_request_pool[request_id];
+ WARN_ON(atomic_read(&io_request->refcount) == 0);
+
+ switch (response->header.iu_type) {
+ case PQI_RESPONSE_IU_RAID_PATH_IO_SUCCESS:
+ case PQI_RESPONSE_IU_AIO_PATH_IO_SUCCESS:
+ case PQI_RESPONSE_IU_GENERAL_MANAGEMENT:
+ 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:
+ dev_err(&ctrl_info->pci_dev->dev,
+ "unexpected IU type: 0x%x\n",
+ response->header.iu_type);
+ WARN_ON(response->header.iu_type);
+ break;
+ }
+
+ 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;
+}
+
+#define PQI_EVENT_ACK_TIMEOUT 30
+
+static void pqi_start_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;
+ unsigned long timeout;
+ 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);
+
+ timeout = (PQI_EVENT_ACK_TIMEOUT * HZ) + jiffies;
+
+ while (1) {
+ spin_lock_irqsave(&queue_group->submit_lock[RAID_PATH], flags);
+
+ iq_pi = queue_group->iq_pi_copy[RAID_PATH];
+ iq_ci = *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 (time_after(jiffies, timeout)) {
+ dev_err(&ctrl_info->pci_dev->dev,
+ "sending event acknowledge timed out\n");
+ 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);
+
+ /*
+ * We have to special-case this type of request because the firmware
+ * does not generate an interrupt when this type of request completes.
+ * Therefore, we have to poll until we see that the firmware has
+ * consumed the request before we move on.
+ */
+
+ timeout = (PQI_EVENT_ACK_TIMEOUT * HZ) + jiffies;
+
+ while (1) {
+ if (*queue_group->iq_ci[RAID_PATH] == iq_pi)
+ break;
+ if (time_after(jiffies, timeout)) {
+ dev_err(&ctrl_info->pci_dev->dev,
+ "completing event acknowledge timed out\n");
+ break;
+ }
+ usleep_range(1000, 2000);
+ }
+}
+
+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_start_event_ack(ctrl_info, &request, sizeof(request));
+}
+
+static void pqi_event_worker(struct work_struct *work)
+{
+ unsigned int i;
+ struct pqi_ctrl_info *ctrl_info;
+ struct pqi_event *pending_event;
+ bool got_non_heartbeat_event = false;
+
+ ctrl_info = container_of(work, struct pqi_ctrl_info, event_work);
+
+ pending_event = ctrl_info->pending_events;
+ for (i = 0; i < PQI_NUM_SUPPORTED_EVENTS; i++) {
+ if (pending_event->pending) {
+ pending_event->pending = false;
+ pqi_acknowledge_event(ctrl_info, pending_event);
+ if (i != PQI_EVENT_HEARTBEAT)
+ got_non_heartbeat_event = true;
+ }
+ pending_event++;
+ }
+
+ if (got_non_heartbeat_event)
+ pqi_schedule_rescan_worker(ctrl_info);
+}
+
+static void pqi_take_ctrl_offline(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;
+
+ ctrl_info->controller_online = false;
+ dev_err(&ctrl_info->pci_dev->dev, "controller offline\n");
+
+ 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) {
+ set_host_byte(scmd, DID_NO_CONNECT);
+ pqi_scsi_done(scmd);
+ }
+
+ list_del(&io_request->request_list_entry);
+ }
+
+ spin_unlock_irqrestore(
+ &queue_group->submit_lock[path], flags);
+ }
+ }
+}
+
+#define PQI_HEARTBEAT_TIMER_INTERVAL (5 * HZ)
+#define PQI_MAX_HEARTBEAT_REQUESTS 5
+
+static void pqi_heartbeat_timer_handler(unsigned long data)
+{
+ int num_interrupts;
+ struct pqi_ctrl_info *ctrl_info = (struct pqi_ctrl_info *)data;
+
+ num_interrupts = atomic_read(&ctrl_info->num_interrupts);
+
+ if (num_interrupts == ctrl_info->previous_num_interrupts) {
+ ctrl_info->num_heartbeats_requested++;
+ if (ctrl_info->num_heartbeats_requested >
+ PQI_MAX_HEARTBEAT_REQUESTS) {
+ pqi_take_ctrl_offline(ctrl_info);
+ return;
+ }
+ ctrl_info->pending_events[PQI_EVENT_HEARTBEAT].pending = true;
+ schedule_work(&ctrl_info->event_work);
+ } else {
+ ctrl_info->num_heartbeats_requested = 0;
+ }
+
+ ctrl_info->previous_num_interrupts = num_interrupts;
+ mod_timer(&ctrl_info->heartbeat_timer,
+ jiffies + PQI_HEARTBEAT_TIMER_INTERVAL);
+}
+
+static void pqi_start_heartbeat_timer(struct pqi_ctrl_info *ctrl_info)
+{
+ ctrl_info->previous_num_interrupts =
+ atomic_read(&ctrl_info->num_interrupts);
+
+ init_timer(&ctrl_info->heartbeat_timer);
+ ctrl_info->heartbeat_timer.expires =
+ jiffies + PQI_HEARTBEAT_TIMER_INTERVAL;
+ ctrl_info->heartbeat_timer.data = (unsigned long)ctrl_info;
+ ctrl_info->heartbeat_timer.function = pqi_heartbeat_timer_handler;
+ add_timer(&ctrl_info->heartbeat_timer);
+ ctrl_info->heartbeat_timer_started = true;
+}
+
+static inline void pqi_stop_heartbeat_timer(struct pqi_ctrl_info *ctrl_info)
+{
+ if (ctrl_info->heartbeat_timer_started)
+ del_timer_sync(&ctrl_info->heartbeat_timer);
+}
+
+static int pqi_event_type_to_event_index(unsigned int event_type)
+{
+ int index;
+
+ switch (event_type) {
+ case PQI_EVENT_TYPE_HEARTBEAT:
+ index = PQI_EVENT_HEARTBEAT;
+ break;
+ case PQI_EVENT_TYPE_HOTPLUG:
+ index = PQI_EVENT_HOTPLUG;
+ break;
+ case PQI_EVENT_TYPE_HARDWARE:
+ index = PQI_EVENT_HARDWARE;
+ break;
+ case PQI_EVENT_TYPE_PHYSICAL_DEVICE:
+ index = PQI_EVENT_PHYSICAL_DEVICE;
+ break;
+ case PQI_EVENT_TYPE_LOGICAL_DEVICE:
+ index = PQI_EVENT_LOGICAL_DEVICE;
+ break;
+ case PQI_EVENT_TYPE_AIO_STATE_CHANGE:
+ index = PQI_EVENT_AIO_STATE_CHANGE;
+ break;
+ case PQI_EVENT_TYPE_AIO_CONFIG_CHANGE:
+ index = PQI_EVENT_AIO_CONFIG_CHANGE;
+ break;
+ default:
+ index = -1;
+ break;
+ }
+
+ return index;
+}
+
+static unsigned int pqi_process_event_intr(struct pqi_ctrl_info *ctrl_info)
+{
+ unsigned 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 *pending_event;
+ bool need_delayed_work;
+ int event_index;
+
+ event_queue = &ctrl_info->event_queue;
+ num_events = 0;
+ need_delayed_work = false;
+ oq_ci = event_queue->oq_ci_copy;
+
+ while (1) {
+ oq_pi = *event_queue->oq_pi;
+ 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) {
+ if (response->request_acknowlege) {
+ pending_event =
+ &ctrl_info->pending_events[event_index];
+ pending_event->event_type =
+ response->event_type;
+ pending_event->event_id = response->event_id;
+ pending_event->additional_event_id =
+ response->additional_event_id;
+ if (event_index != PQI_EVENT_HEARTBEAT) {
+ pending_event->pending = true;
+ need_delayed_work = true;
+ }
+ }
+ }
+
+ 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);
+
+ if (need_delayed_work)
+ schedule_work(&ctrl_info->event_work);
+ }
+
+ return num_events;
+}
+
+static irqreturn_t pqi_irq_handler(int irq, void *data)
+{
+ struct pqi_ctrl_info *ctrl_info;
+ struct pqi_queue_group *queue_group;
+ unsigned int num_responses_handled;
+
+ queue_group = data;
+ ctrl_info = queue_group->ctrl_info;
+
+ if (!ctrl_info || !queue_group->oq_ci)
+ return IRQ_NONE;
+
+ num_responses_handled = pqi_process_io_intr(ctrl_info, queue_group);
+
+ if (irq == ctrl_info->event_irq)
+ num_responses_handled += pqi_process_event_intr(ctrl_info);
+
+ if (num_responses_handled)
+ 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);
+
+ return IRQ_HANDLED;
+}
+
+static int pqi_request_irqs(struct pqi_ctrl_info *ctrl_info)
+{
+ int i;
+ int rc;
+
+ ctrl_info->event_irq = ctrl_info->msix_vectors[0];
+
+ for (i = 0; i < ctrl_info->num_msix_vectors_enabled; i++) {
+ rc = request_irq(ctrl_info->msix_vectors[i],
+ pqi_irq_handler, 0,
+ DRIVER_NAME_SHORT, ctrl_info->intr_data[i]);
+ if (rc) {
+ dev_err(&ctrl_info->pci_dev->dev,
+ "irq %u init failed with error %d\n",
+ ctrl_info->msix_vectors[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(ctrl_info->msix_vectors[i],
+ ctrl_info->intr_data[i]);
+}
+
+static int pqi_enable_msix_interrupts(struct pqi_ctrl_info *ctrl_info)
+{
+ unsigned int i;
+ int max_vectors;
+ int num_vectors_enabled;
+ struct msix_entry msix_entries[PQI_MAX_MSIX_VECTORS];
+
+ max_vectors = ctrl_info->num_queue_groups;
+
+ for (i = 0; i < max_vectors; i++)
+ msix_entries[i].entry = i;
+
+ num_vectors_enabled = pci_enable_msix_range(ctrl_info->pci_dev,
+ msix_entries, PQI_MIN_MSIX_VECTORS, max_vectors);
+
+ 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;
+ for (i = 0; i < num_vectors_enabled; i++) {
+ ctrl_info->msix_vectors[i] = msix_entries[i].vector;
+ ctrl_info->intr_data[i] = &ctrl_info->queue_groups[i];
+ }
+
+ return 0;
+}
+
+static void pqi_irq_set_affinity_hint(struct pqi_ctrl_info *ctrl_info)
+{
+ int i;
+ int rc;
+ int cpu;
+
+ cpu = cpumask_first(cpu_online_mask);
+ for (i = 0; i < ctrl_info->num_msix_vectors_initialized; i++) {
+ rc = irq_set_affinity_hint(ctrl_info->msix_vectors[i],
+ get_cpu_mask(cpu));
+ if (rc)
+ dev_err(&ctrl_info->pci_dev->dev,
+ "error %d setting affinity hint for irq vector %u\n",
+ rc, ctrl_info->msix_vectors[i]);
+ cpu = cpumask_next(cpu, cpu_online_mask);
+ }
+}
+
+static void pqi_irq_unset_affinity_hint(struct pqi_ctrl_info *ctrl_info)
+{
+ int i;
+
+ for (i = 0; i < ctrl_info->num_msix_vectors_initialized; i++)
+ irq_set_affinity_hint(ctrl_info->msix_vectors[i], NULL);
+}
+
+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 *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;
+
+ ctrl_info->queue_memory_base =
+ dma_zalloc_coherent(&ctrl_info->pci_dev->dev,
+ alloc_length,
+ &ctrl_info->queue_memory_base_dma_handle, GFP_KERNEL);
+
+ if (!ctrl_info->queue_memory_base) {
+ dev_err(&ctrl_info->pci_dev->dev,
+ "failed to allocate memory for PQI admin queues\n");
+ 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 = 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 - 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 - 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 - 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 - 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_zalloc_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 = &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 *)admin_queues->oq_pi -
+ ctrl_info->admin_queue_memory_base);
+
+ return 0;
+}
+
+#define PQI_ADMIN_QUEUE_CREATE_TIMEOUT_JIFFIES 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);
+}
+
+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 = (3 * HZ) + jiffies;
+
+ while (1) {
+ oq_pi = *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;
+ }
+ 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)
+ 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 = *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);
+}
+
+static void pqi_raid_synchronous_complete(struct pqi_io_request *io_request,
+ void *context)
+{
+ struct completion *waiting = context;
+
+ complete(waiting);
+}
+
+static int pqi_submit_raid_request_synchronous_with_io_request(
+ struct pqi_ctrl_info *ctrl_info, struct pqi_io_request *io_request,
+ unsigned long timeout_msecs)
+{
+ int rc = 0;
+ DECLARE_COMPLETION_ONSTACK(wait);
+
+ 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);
+
+ if (timeout_msecs == NO_TIMEOUT) {
+ wait_for_completion_io(&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;
+ }
+ }
+
+ 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;
+ struct pqi_io_request *io_request;
+ unsigned long start_jiffies;
+ unsigned long msecs_blocked;
+ size_t iu_length;
+
+ /*
+ * 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)
+ return -ETIMEDOUT;
+ timeout_msecs -= msecs_blocked;
+ }
+ }
+
+ 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);
+
+ rc = pqi_submit_raid_request_synchronous_with_io_request(ctrl_info,
+ io_request, timeout_msecs);
+
+ 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) {
+ u8 scsi_status;
+ struct pqi_raid_error_info *raid_error_info;
+
+ raid_error_info = io_request->error_info;
+ scsi_status = raid_error_info->status;
+
+ if (scsi_status == SAM_STAT_CHECK_CONDITION &&
+ raid_error_info->data_out_result ==
+ PQI_DATA_IN_OUT_UNDERFLOW)
+ scsi_status = SAM_STAT_GOOD;
+
+ if (scsi_status != SAM_STAT_GOOD)
+ rc = -EIO;
+ }
+
+ pqi_free_io_request(io_request);
+
+ 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),
+ PCI_DMA_FROMDEVICE);
+ 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,
+ PCI_DMA_FROMDEVICE);
+
+ 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;
+ }
+
+ return 0;
+}
+
+static int pqi_delete_operational_queue(struct pqi_ctrl_info *ctrl_info,
+ bool inbound_queue, u16 queue_id)
+{
+ struct pqi_general_admin_request request;
+ struct pqi_general_admin_response response;
+
+ 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);
+ if (inbound_queue)
+ request.function_code =
+ PQI_GENERAL_ADMIN_FUNCTION_DELETE_IQ;
+ else
+ request.function_code =
+ PQI_GENERAL_ADMIN_FUNCTION_DELETE_OQ;
+ put_unaligned_le16(queue_id,
+ &request.data.delete_operational_queue.queue_id);
+
+ return pqi_submit_admin_request_synchronous(ctrl_info, &request,
+ &response);
+}
+
+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 i;
+ int rc;
+ struct pqi_queue_group *queue_group;
+ struct pqi_general_admin_request request;
+ struct pqi_general_admin_response response;
+
+ i = ctrl_info->num_active_queue_groups;
+ queue_group = &ctrl_info->queue_groups[i];
+
+ /*
+ * 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");
+ goto delete_inbound_queue_raid;
+ }
+
+ 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");
+ goto delete_inbound_queue_aio;
+ }
+
+ /*
+ * 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");
+ goto delete_inbound_queue_aio;
+ }
+
+ queue_group->oq_ci = ctrl_info->iomem_base +
+ PQI_DEVICE_REGISTERS_OFFSET +
+ get_unaligned_le64(
+ &response.data.create_operational_oq.oq_ci_offset);
+
+ ctrl_info->num_active_queue_groups++;
+
+ return 0;
+
+delete_inbound_queue_aio:
+ pqi_delete_operational_queue(ctrl_info, true,
+ queue_group->iq_id[AIO_PATH]);
+
+delete_inbound_queue_raid:
+ pqi_delete_operational_queue(ctrl_info, true,
+ queue_group->iq_id[RAID_PATH]);
+
+ return rc;
+}
+
+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);
+ 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)
+{
+ int rc;
+ unsigned int i;
+ struct pqi_event_config *event_config;
+ 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,
+ PCI_DMA_FROMDEVICE);
+ 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,
+ PCI_DMA_FROMDEVICE);
+
+ if (rc)
+ goto out;
+
+ for (i = 0; i < event_config->num_event_descriptors; i++)
+ put_unaligned_le16(ctrl_info->event_queue.oq_id,
+ &event_config->descriptors[i].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,
+ PCI_DMA_TODEVICE);
+ 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,
+ PCI_DMA_TODEVICE);
+
+out:
+ kfree(event_config);
+
+ return rc;
+}
+
+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_zalloc_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 = kzalloc(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;
+
+ 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);
+ 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_cpus;
+ int max_queue_groups;
+ int num_queue_groups;
+ u16 num_elements_per_iq;
+ u16 num_elements_per_oq;
+
+ 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;
+
+ if (ctrl_info->max_inbound_iu_length_per_firmware == 256 &&
+ ctrl_info->outbound_spanning_supported) {
+ /*
+ * TEMPHACK
+ * This is older f/w that doesn't actually support spanning.
+ */
+ ctrl_info->max_inbound_iu_length =
+ PQI_OPERATIONAL_IQ_ELEMENT_LENGTH;
+ } else {
+ /*
+ * 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;
+ unsigned int num_sg_in_iu = 0;
+ struct scatterlist *sg;
+ struct pqi_sg_descriptor *sg_descriptor;
+
+ sg_count = scsi_dma_map(scmd);
+ if (sg_count < 0)
+ return sg_count;
+ if (sg_count == 0)
+ goto out;
+
+ if (sg_count <= ctrl_info->max_sg_per_iu) {
+ sg_descriptor = &request->sg_descriptors[0];
+ scsi_for_each_sg(scmd, sg, sg_count, i) {
+ pqi_set_sg_descriptor(sg_descriptor, sg);
+ sg_descriptor++;
+ }
+ put_unaligned_le32(CISS_SG_LAST,
+ &request->sg_descriptors[sg_count - 1].flags);
+ num_sg_in_iu = sg_count;
+ } else {
+ sg_descriptor = &request->sg_descriptors[0];
+ put_unaligned_le64((u64)io_request->sg_chain_buffer_dma_handle,
+ &sg_descriptor->address);
+ put_unaligned_le32(sg_count * sizeof(*sg_descriptor),
+ &sg_descriptor->length);
+ put_unaligned_le32(CISS_SG_CHAIN, &sg_descriptor->flags);
+
+ sg_descriptor = io_request->sg_chain_buffer;
+ scsi_for_each_sg(scmd, sg, sg_count, i) {
+ pqi_set_sg_descriptor(sg_descriptor, sg);
+ sg_descriptor++;
+ }
+ put_unaligned_le32(CISS_SG_LAST,
+ &io_request->sg_chain_buffer[sg_count - 1].flags);
+ num_sg_in_iu = 1;
+ request->partial = 1;
+ }
+
+out:
+ iu_length = offsetof(struct pqi_aio_path_request, sg_descriptors) -
+ PQI_REQUEST_HEADER_LENGTH;
+ iu_length += num_sg_in_iu * sizeof(*sg_descriptor);
+ 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(struct pqi_ctrl_info *ctrl_info,
+ struct pqi_scsi_dev *device, struct scsi_cmnd *scmd,
+ struct pqi_queue_group *queue_group)
+{
+ int rc;
+ size_t cdb_length;
+ struct pqi_io_request *io_request;
+ struct pqi_raid_path_request *request;
+
+ io_request = pqi_alloc_io_request(ctrl_info);
+ io_request->io_complete_callback = pqi_raid_io_complete;
+ io_request->scmd = scmd;
+
+ scmd->host_scribble = (unsigned char *)io_request;
+
+ 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_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);
+ WARN_ON(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 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);
+ 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);
+}
+
+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)
+{
+ 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;
+
+ scmd->host_scribble = (unsigned char *)io_request;
+
+ 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);
+ WARN_ON(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 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 hwq;
+ struct pqi_queue_group *queue_group;
+ bool raid_bypassed;
+
+ device = scmd->device->hostdata;
+
+ if (device->reset_in_progress) {
+ set_host_byte(scmd, DID_RESET);
+ pqi_scsi_done(scmd);
+ return 0;
+ }
+
+ ctrl_info = shost_to_hba(shost);
+
+ if (pqi_ctrl_offline(ctrl_info)) {
+ set_host_byte(scmd, DID_NO_CONNECT);
+ pqi_scsi_done(scmd);
+ return 0;
+ }
+
+ hwq = blk_mq_unique_tag_to_hwq(blk_mq_unique_tag(scmd->request));
+ if (hwq >= ctrl_info->num_queue_groups)
+ hwq = 0;
+
+ queue_group = &ctrl_info->queue_groups[hwq];
+
+ if (pqi_is_logical_device(device)) {
+ raid_bypassed = false;
+ if (device->offload_enabled &&
+ scmd->request->cmd_type == REQ_TYPE_FS) {
+ rc = pqi_raid_bypass_submit_scsi_cmd(ctrl_info, device,
+ scmd, queue_group);
+ if (rc == 0 ||
+ rc == SCSI_MLQUEUE_HOST_BUSY ||
+ rc == SAM_STAT_CHECK_CONDITION ||
+ rc == SAM_STAT_RESERVATION_CONFLICT)
+ raid_bypassed = true;
+ }
+ 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);
+ }
+
+ return rc;
+}
+
+static inline void pqi_complete_queued_requests_queue_group(
+ struct pqi_queue_group *queue_group,
+ struct pqi_scsi_dev *device_in_reset)
+{
+ unsigned int path;
+ unsigned long flags;
+ struct pqi_io_request *io_request;
+ struct pqi_io_request *next;
+ struct scsi_cmnd *scmd;
+ struct pqi_scsi_dev *device;
+
+ 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;
+ device = scmd->device->hostdata;
+ if (device == device_in_reset) {
+ set_host_byte(scmd, DID_RESET);
+ pqi_scsi_done(scmd);
+ list_del(&io_request->
+ request_list_entry);
+ }
+ }
+
+ spin_unlock_irqrestore(&queue_group->submit_lock[path], flags);
+ }
+}
+
+static void pqi_complete_queued_requests(struct pqi_ctrl_info *ctrl_info,
+ struct pqi_scsi_dev *device_in_reset)
+{
+ unsigned int i;
+ struct pqi_queue_group *queue_group;
+
+ for (i = 0; i < ctrl_info->num_queue_groups; i++) {
+ queue_group = &ctrl_info->queue_groups[i];
+ pqi_complete_queued_requests_queue_group(queue_group,
+ device_in_reset);
+ }
+}
+
+static void pqi_reset_lun_complete(struct pqi_io_request *io_request,
+ void *context)
+{
+ struct completion *waiting = context;
+
+ complete(waiting);
+}
+
+static int pqi_reset_lun(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;
+
+ down(&ctrl_info->lun_reset_sem);
+
+ io_request = pqi_alloc_io_request(ctrl_info);
+ io_request->io_complete_callback = pqi_reset_lun_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;
+
+ pqi_start_io(ctrl_info,
+ &ctrl_info->queue_groups[PQI_DEFAULT_QUEUE_GROUP], RAID_PATH,
+ io_request);
+
+ if (!wait_for_completion_io_timeout(&wait,
+ msecs_to_jiffies(PQI_ABORT_TIMEOUT_MSECS))) {
+ rc = -ETIMEDOUT;
+ } else {
+ rc = io_request->status;
+ }
+
+ pqi_free_io_request(io_request);
+ up(&ctrl_info->lun_reset_sem);
+
+ return rc;
+}
+
+/* Performs a reset at the LUN level. */
+
+static int pqi_device_reset(struct pqi_ctrl_info *ctrl_info,
+ struct pqi_scsi_dev *device)
+{
+ int rc;
+
+ pqi_check_ctrl_health(ctrl_info);
+ if (pqi_ctrl_offline(ctrl_info))
+ return FAILED;
+
+ device->reset_in_progress = true;
+ pqi_complete_queued_requests(ctrl_info, device);
+ rc = pqi_reset_lun(ctrl_info, device);
+ device->reset_in_progress = false;
+
+ if (rc)
+ return FAILED;
+
+ return SUCCESS;
+}
+
+static int pqi_eh_device_reset_handler(struct scsi_cmnd *scmd)
+{
+ int rc;
+ struct pqi_ctrl_info *ctrl_info;
+ struct pqi_scsi_dev *device;
+
+ ctrl_info = shost_to_hba(scmd->device->host);
+
+ device = scmd->device->hostdata;
+
+ dev_err(&ctrl_info->pci_dev->dev,
+ "resetting scsi %d:%d:%d:%d\n",
+ ctrl_info->scsi_host->host_no,
+ device->bus, device->target, device->lun);
+
+ rc = pqi_device_reset(ctrl_info, device);
+
+ dev_err(&ctrl_info->pci_dev->dev,
+ "reset of scsi %d:%d:%d:%d: %s\n",
+ ctrl_info->scsi_host->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 && device->expose_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);
+ }
+ }
+
+ spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
+
+ return 0;
+}
+
+static int pqi_slave_configure(struct scsi_device *sdev)
+{
+ struct pqi_scsi_dev *device;
+
+ device = sdev->hostdata;
+ if (!device->expose_device)
+ sdev->no_uld_attach = true;
+
+ return 0;
+}
+
+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:
+ 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;
+ }
+
+ 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, PCI_DMA_BIDIRECTIONAL);
+ if (rc)
+ goto out;
+
+ iu_length += sizeof(request.sg_descriptors[0]);
+ }
+
+ put_unaligned_le16(iu_length, &request.header.iu_length);
+
+ 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,
+ PCI_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, int cmd, void __user *arg)
+{
+ int rc;
+ struct pqi_ctrl_info *ctrl_info;
+
+ ctrl_info = shost_to_hba(sdev->host);
+
+ 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_version_show(struct device *dev,
+ struct device_attribute *attr, char *buffer)
+{
+ ssize_t count = 0;
+ struct Scsi_Host *shost;
+ struct pqi_ctrl_info *ctrl_info;
+
+ shost = class_to_shost(dev);
+ ctrl_info = shost_to_hba(shost);
+
+ count += snprintf(buffer + count, PAGE_SIZE - count,
+ " driver: %s\n", DRIVER_VERSION BUILD_TIMESTAMP);
+
+ count += snprintf(buffer + count, PAGE_SIZE - count,
+ "firmware: %s\n", ctrl_info->firmware_version);
+
+ return count;
+}
+
+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 DEVICE_ATTR(version, S_IRUGO, pqi_version_show, NULL);
+static DEVICE_ATTR(rescan, S_IWUSR, NULL, pqi_host_rescan_store);
+
+static struct device_attribute *pqi_shost_attrs[] = {
+ &dev_attr_version,
+ &dev_attr_rescan,
+ NULL
+};
+
+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 (pqi_is_logical_device(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;
+ buffer[0] = device->offload_enabled ? '1' : '0';
+ buffer[1] = '\n';
+ buffer[2] = '\0';
+
+ spin_unlock_irqrestore(&ctrl_info->scsi_device_list_lock, flags);
+
+ return 2;
+}
+
+static DEVICE_ATTR(sas_address, S_IRUGO, pqi_sas_address_show, NULL);
+static DEVICE_ATTR(ssd_smart_path_enabled, S_IRUGO,
+ pqi_ssd_smart_path_enabled_show, NULL);
+
+static struct device_attribute *pqi_sdev_attrs[] = {
+ &dev_attr_sas_address,
+ &dev_attr_ssd_smart_path_enabled,
+ 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,
+ .use_clustering = ENABLE_CLUSTERING,
+ .eh_device_reset_handler = pqi_eh_device_reset_handler,
+ .ioctl = pqi_ioctl,
+ .slave_alloc = pqi_slave_alloc,
+ .slave_configure = pqi_slave_configure,
+ .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 = ctrl_info->msix_vectors[0];
+ shost->unique_id = shost->irq;
+ shost->nr_hw_queues = ctrl_info->num_queue_groups;
+ 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);
+}
+
+#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
+
+static int pqi_reset(struct pqi_ctrl_info *ctrl_info)
+{
+ int rc;
+ u32 reset_params;
+
+ reset_params = (PQI_RESET_ACTION_RESET << 5) |
+ PQI_RESET_TYPE_HARD_RESET;
+
+ writel(reset_params,
+ &ctrl_info->pqi_registers->device_reset);
+
+ rc = pqi_wait_for_pqi_mode_ready(ctrl_info);
+ if (rc)
+ dev_err(&ctrl_info->pci_dev->dev,
+ "PQI reset failed\n");
+
+ return rc;
+}
+
+static int pqi_get_ctrl_firmware_version(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));
+
+out:
+ kfree(identify);
+
+ return rc;
+}
+
+static int pqi_ctrl_init(struct pqi_ctrl_info *ctrl_info)
+{
+ int rc;
+
+ /*
+ * When the controller comes out of reset, it is always running
+ * in legacy SIS mode. This is so that it can be compatible
+ * with legacy drivers shipped with OSes. So we have to talk
+ * to it using SIS commands at first. Once we are satisified
+ * that the controller supports PQI, we transition it into PQI
+ * mode.
+ */
+
+ /*
+ * Wait until the controller is ready to start accepting SIS
+ * commands.
+ */
+ rc = sis_wait_for_ctrl_ready(ctrl_info);
+ if (rc) {
+ dev_err(&ctrl_info->pci_dev->dev,
+ "error initializing SIS interface\n");
+ 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 (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;
+
+ rc = pqi_alloc_admin_queues(ctrl_info);
+ if (rc) {
+ dev_err(&ctrl_info->pci_dev->dev,
+ "error allocating 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)
+ return rc;
+
+ pqi_init_operational_queues(ctrl_info);
+
+ rc = pqi_request_irqs(ctrl_info);
+ if (rc)
+ return rc;
+
+ pqi_irq_set_affinity_hint(ctrl_info);
+
+ rc = pqi_create_queues(ctrl_info);
+ if (rc)
+ return rc;
+
+ sis_enable_msix(ctrl_info);
+
+ rc = pqi_configure_events(ctrl_info);
+ if (rc) {
+ dev_err(&ctrl_info->pci_dev->dev,
+ "error configuring events\n");
+ return rc;
+ }
+
+ pqi_start_heartbeat_timer(ctrl_info);
+
+ ctrl_info->controller_online = true;
+
+ /* Register with the SCSI subsystem. */
+ rc = pqi_register_scsi(ctrl_info);
+ if (rc)
+ return rc;
+
+ rc = pqi_get_ctrl_firmware_version(ctrl_info);
+ if (rc) {
+ dev_err(&ctrl_info->pci_dev->dev,
+ "error obtaining firmware version\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 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(&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_nocache(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;
+ }
+
+ ctrl_info->registers = ctrl_info->iomem_base;
+ ctrl_info->pqi_registers = &ctrl_info->registers->pqi_registers;
+
+ /* Enable bus mastering. */
+ pci_set_master(ctrl_info->pci_dev);
+
+ 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);
+ 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);
+
+ 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);
+
+ INIT_DELAYED_WORK(&ctrl_info->rescan_work, pqi_rescan_worker);
+ INIT_DELAYED_WORK(&ctrl_info->update_time_work, pqi_update_time_worker);
+
+ sema_init(&ctrl_info->sync_request_sem,
+ PQI_RESERVED_IO_SLOTS_SYNCHRONOUS_REQUESTS);
+ sema_init(&ctrl_info->lun_reset_sem, PQI_RESERVED_IO_SLOTS_LUN_RESET);
+
+ ctrl_info->ctrl_id = atomic_inc_return(&pqi_controller_count) - 1;
+ 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_irq_unset_affinity_hint(ctrl_info);
+ pqi_free_irqs(ctrl_info);
+ if (ctrl_info->num_msix_vectors_enabled)
+ pci_disable_msix(ctrl_info->pci_dev);
+}
+
+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)
+{
+ int rc;
+
+ if (ctrl_info->controller_online) {
+ cancel_delayed_work_sync(&ctrl_info->rescan_work);
+ cancel_delayed_work_sync(&ctrl_info->update_time_work);
+ pqi_remove_all_scsi_devices(ctrl_info);
+ pqi_unregister_scsi(ctrl_info);
+ ctrl_info->controller_online = false;
+ }
+ if (ctrl_info->pqi_mode_enabled) {
+ sis_disable_msix(ctrl_info);
+ rc = pqi_reset(ctrl_info);
+ if (rc == 0)
+ sis_reenable_sis_mode(ctrl_info);
+ }
+ pqi_free_ctrl_resources(ctrl_info);
+}
+
+static void pqi_print_ctrl_info(struct pci_dev *pdev,
+ const struct pci_device_id *id)
+{
+ char *ctrl_description;
+
+ if (id->driver_data) {
+ ctrl_description = (char *)id->driver_data;
+ } else {
+ switch (id->subvendor) {
+ case PCI_VENDOR_ID_HP:
+ ctrl_description = hpe_branded_controller;
+ break;
+ case PCI_VENDOR_ID_ADAPTEC2:
+ default:
+ ctrl_description = microsemi_branded_controller;
+ break;
+ }
+ }
+
+ dev_info(&pdev->dev, "%s found\n", ctrl_description);
+}
+
+static int pqi_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
+{
+ int rc;
+ int node;
+ struct pqi_ctrl_info *ctrl_info;
+
+ pqi_print_ctrl_info(pdev, id);
+
+ if (pqi_disable_device_id_wildcards &&
+ id->subvendor == PCI_ANY_ID &&
+ id->subdevice == PCI_ANY_ID) {
+ dev_warn(&pdev->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(&pdev->dev,
+ "controller device ID matched using wildcards\n");
+
+ node = dev_to_node(&pdev->dev);
+ if (node == NUMA_NO_NODE)
+ set_dev_node(&pdev->dev, 0);
+
+ ctrl_info = pqi_alloc_ctrl_info(node);
+ if (!ctrl_info) {
+ dev_err(&pdev->dev,
+ "failed to allocate controller info block\n");
+ return -ENOMEM;
+ }
+
+ ctrl_info->pci_dev = pdev;
+
+ 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 *pdev)
+{
+ struct pqi_ctrl_info *ctrl_info;
+
+ ctrl_info = pci_get_drvdata(pdev);
+ if (!ctrl_info)
+ return;
+
+ pqi_remove_ctrl(ctrl_info);
+}
+
+static void pqi_shutdown(struct pci_dev *pdev)
+{
+ int rc;
+ struct pqi_ctrl_info *ctrl_info;
+
+ ctrl_info = pci_get_drvdata(pdev);
+ if (!ctrl_info)
+ goto error;
+
+ /*
+ * Write all data in the controller's battery-backed cache to
+ * storage.
+ */
+ rc = pqi_flush_cache(ctrl_info);
+ if (rc == 0)
+ return;
+
+error:
+ dev_warn(&pdev->dev,
+ "unable to flush controller cache\n");
+}
+
+/* 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,
+ PCI_VENDOR_ID_ADAPTEC2, 0x0110)
+ },
+ {
+ 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, 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_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, 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_HP, 0x1001)
+ },
+ {
+ 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,
+ PCI_VENDOR_ID_HP, 0x1102)
+ },
+ {
+ PCI_DEVICE_SUB(PCI_VENDOR_ID_ADAPTEC2, 0x028f,
+ PCI_VENDOR_ID_HP, 0x1150)
+ },
+ {
+ 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,
+};
+
+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;
+
+ 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_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(FIELD_SIZEOF(struct pqi_general_admin_request,
+ data.create_operational_iq) != 64 - 11);
+ BUILD_BUG_ON(FIELD_SIZEOF(struct pqi_general_admin_request,
+ data.create_operational_oq) != 64 - 11);
+ BUILD_BUG_ON(FIELD_SIZEOF(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,
+ 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(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,
+ 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(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);
+}
projects / platform / kernel / linux-rpi.git / commitdiff