struct scsi_cmnd *scmd, u32 aio_handle, u8 *cdb,
unsigned int cdb_length, struct pqi_queue_group *queue_group,
struct pqi_encryption_info *encryption_info, bool raid_bypass);
+static int pqi_aio_submit_r56_write_io(struct pqi_ctrl_info *ctrl_info,
+ struct scsi_cmnd *scmd, struct pqi_queue_group *queue_group,
+ struct pqi_encryption_info *encryption_info, struct pqi_scsi_dev *device,
+ struct pqi_scsi_dev_raid_map_data *rmd);
static void pqi_ofa_ctrl_quiesce(struct pqi_ctrl_info *ctrl_info);
static void pqi_ofa_ctrl_unquiesce(struct pqi_ctrl_info *ctrl_info);
static int pqi_ofa_ctrl_restart(struct pqi_ctrl_info *ctrl_info);
* Attempt to perform RAID bypass mapping for a logical volume I/O.
*/
-static bool pqi_aio_raid_level_supported(struct pqi_scsi_dev_raid_map_data *rmd)
+static bool pqi_aio_raid_level_supported(struct pqi_ctrl_info *ctrl_info,
+ struct pqi_scsi_dev_raid_map_data *rmd)
{
bool is_supported = true;
is_supported = false;
break;
case SA_RAID_5:
- fallthrough;
+ if (rmd->is_write && !ctrl_info->enable_r5_writes)
+ is_supported = false;
+ break;
case SA_RAID_6:
- if (rmd->is_write)
+ if (rmd->is_write && !ctrl_info->enable_r6_writes)
is_supported = false;
break;
case SA_RAID_ADM:
rmd->total_disks_per_row)) +
(rmd->map_row * rmd->total_disks_per_row) + rmd->first_column;
+ if (rmd->is_write) {
+ u32 index;
+
+ /*
+ * p_parity_it_nexus and q_parity_it_nexus are pointers to the
+ * parity entries inside the device's raid_map.
+ *
+ * A device's RAID map is bounded by: number of RAID disks squared.
+ *
+ * The devices RAID map size is checked during device
+ * initialization.
+ */
+ index = DIV_ROUND_UP(rmd->map_index + 1, rmd->total_disks_per_row);
+ index *= rmd->total_disks_per_row;
+ index -= get_unaligned_le16(&raid_map->metadata_disks_per_row);
+
+ rmd->p_parity_it_nexus = raid_map->disk_data[index].aio_handle;
+ if (rmd->raid_level == SA_RAID_6) {
+ rmd->q_parity_it_nexus = raid_map->disk_data[index + 1].aio_handle;
+ rmd->xor_mult = raid_map->disk_data[rmd->map_index].xor_mult[1];
+ }
+ if (rmd->blocks_per_row == 0)
+ return PQI_RAID_BYPASS_INELIGIBLE;
+#if BITS_PER_LONG == 32
+ tmpdiv = rmd->first_block;
+ do_div(tmpdiv, rmd->blocks_per_row);
+ rmd->row = tmpdiv;
+#else
+ rmd->row = rmd->first_block / rmd->blocks_per_row;
+#endif
+ }
+
return 0;
}
rmd.raid_level = device->raid_level;
- if (!pqi_aio_raid_level_supported(&rmd))
+ if (!pqi_aio_raid_level_supported(ctrl_info, &rmd))
return PQI_RAID_BYPASS_INELIGIBLE;
if (unlikely(rmd.block_cnt == 0))
} else if (device->raid_level == SA_RAID_ADM) {
rc = pqi_calc_aio_raid_adm(&rmd, device);
} else if ((device->raid_level == SA_RAID_5 ||
- device->raid_level == SA_RAID_6) && rmd.layout_map_count > 1) {
+ device->raid_level == SA_RAID_6) &&
+ (rmd.layout_map_count > 1 || rmd.is_write)) {
rc = pqi_calc_aio_r5_or_r6(&rmd, raid_map);
if (rc)
return PQI_RAID_BYPASS_INELIGIBLE;
encryption_info_ptr = NULL;
}
- return pqi_aio_submit_io(ctrl_info, scmd, rmd.aio_handle,
+ if (rmd.is_write) {
+ switch (device->raid_level) {
+ case SA_RAID_0:
+ return pqi_aio_submit_io(ctrl_info, scmd, rmd.aio_handle,
rmd.cdb, rmd.cdb_length, queue_group,
encryption_info_ptr, true);
+ case SA_RAID_5:
+ case SA_RAID_6:
+ return pqi_aio_submit_r56_write_io(ctrl_info, scmd, queue_group,
+ encryption_info_ptr, device, &rmd);
+ default:
+ return pqi_aio_submit_io(ctrl_info, scmd, rmd.aio_handle,
+ rmd.cdb, rmd.cdb_length, queue_group,
+ encryption_info_ptr, true);
+ }
+ } else {
+ return pqi_aio_submit_io(ctrl_info, scmd, rmd.aio_handle,
+ rmd.cdb, rmd.cdb_length, queue_group,
+ encryption_info_ptr, true);
+ }
+
}
#define PQI_STATUS_IDLE 0x0
PQI_OPERATIONAL_IQ_ELEMENT_LENGTH) /
sizeof(struct pqi_sg_descriptor)) +
PQI_MAX_EMBEDDED_SG_DESCRIPTORS;
+
+ ctrl_info->max_sg_per_r56_iu =
+ ((ctrl_info->max_inbound_iu_length -
+ PQI_OPERATIONAL_IQ_ELEMENT_LENGTH) /
+ sizeof(struct pqi_sg_descriptor)) +
+ PQI_MAX_EMBEDDED_R56_SG_DESCRIPTORS;
}
static inline void pqi_set_sg_descriptor(
return 0;
}
+static int pqi_build_aio_r56_sg_list(struct pqi_ctrl_info *ctrl_info,
+ struct pqi_aio_r56_path_request *request, struct scsi_cmnd *scmd,
+ struct pqi_io_request *io_request)
+{
+ u16 iu_length;
+ int sg_count;
+ bool chained;
+ unsigned int num_sg_in_iu;
+ struct scatterlist *sg;
+ struct pqi_sg_descriptor *sg_descriptor;
+
+ sg_count = scsi_dma_map(scmd);
+ if (sg_count < 0)
+ return sg_count;
+
+ iu_length = offsetof(struct pqi_aio_r56_path_request, sg_descriptors) -
+ PQI_REQUEST_HEADER_LENGTH;
+ num_sg_in_iu = 0;
+
+ if (sg_count != 0) {
+ sg = scsi_sglist(scmd);
+ sg_descriptor = request->sg_descriptors;
+
+ num_sg_in_iu = pqi_build_sg_list(sg_descriptor, sg, sg_count, io_request,
+ ctrl_info->max_sg_per_r56_iu, &chained);
+
+ request->partial = chained;
+ 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 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)
return 0;
}
+static int pqi_aio_submit_r56_write_io(struct pqi_ctrl_info *ctrl_info,
+ struct scsi_cmnd *scmd, struct pqi_queue_group *queue_group,
+ struct pqi_encryption_info *encryption_info, struct pqi_scsi_dev *device,
+ struct pqi_scsi_dev_raid_map_data *rmd)
+{
+ int rc;
+ struct pqi_io_request *io_request;
+ struct pqi_aio_r56_path_request *r56_request;
+
+ io_request = pqi_alloc_io_request(ctrl_info);
+ io_request->io_complete_callback = pqi_aio_io_complete;
+ io_request->scmd = scmd;
+ io_request->raid_bypass = true;
+
+ r56_request = io_request->iu;
+ memset(r56_request, 0, offsetof(struct pqi_aio_r56_path_request, sg_descriptors));
+
+ if (device->raid_level == SA_RAID_5 || device->raid_level == SA_RAID_51)
+ r56_request->header.iu_type = PQI_REQUEST_IU_AIO_PATH_RAID5_IO;
+ else
+ r56_request->header.iu_type = PQI_REQUEST_IU_AIO_PATH_RAID6_IO;
+
+ put_unaligned_le16(*(u16 *)device->scsi3addr & 0x3fff, &r56_request->volume_id);
+ put_unaligned_le32(rmd->aio_handle, &r56_request->data_it_nexus);
+ put_unaligned_le32(rmd->p_parity_it_nexus, &r56_request->p_parity_it_nexus);
+ if (rmd->raid_level == SA_RAID_6) {
+ put_unaligned_le32(rmd->q_parity_it_nexus, &r56_request->q_parity_it_nexus);
+ r56_request->xor_multiplier = rmd->xor_mult;
+ }
+ put_unaligned_le32(scsi_bufflen(scmd), &r56_request->data_length);
+ r56_request->task_attribute = SOP_TASK_ATTRIBUTE_SIMPLE;
+ put_unaligned_le64(rmd->row, &r56_request->row);
+
+ put_unaligned_le16(io_request->index, &r56_request->request_id);
+ r56_request->error_index = r56_request->request_id;
+
+ if (rmd->cdb_length > sizeof(r56_request->cdb))
+ rmd->cdb_length = sizeof(r56_request->cdb);
+ r56_request->cdb_length = rmd->cdb_length;
+ memcpy(r56_request->cdb, rmd->cdb, rmd->cdb_length);
+
+ /* The direction is always write. */
+ r56_request->data_direction = SOP_READ_FLAG;
+
+ if (encryption_info) {
+ r56_request->encryption_enable = true;
+ put_unaligned_le16(encryption_info->data_encryption_key_index,
+ &r56_request->data_encryption_key_index);
+ put_unaligned_le32(encryption_info->encrypt_tweak_lower,
+ &r56_request->encrypt_tweak_lower);
+ put_unaligned_le32(encryption_info->encrypt_tweak_upper,
+ &r56_request->encrypt_tweak_upper);
+ }
+
+ rc = pqi_build_aio_r56_sg_list(ctrl_info, r56_request, scmd, io_request);
+ if (rc) {
+ pqi_free_io_request(io_request);
+ return SCSI_MLQUEUE_HOST_BUSY;
+ }
+
+ pqi_start_io(ctrl_info, queue_group, AIO_PATH, io_request);
+
+ return 0;
+}
+
static inline u16 pqi_get_hw_queue(struct pqi_ctrl_info *ctrl_info,
struct scsi_cmnd *scmd)
{
return -EINVAL;
}
+static ssize_t pqi_host_enable_r5_writes_show(struct device *dev,
+ struct device_attribute *attr, char *buffer)
+{
+ struct Scsi_Host *shost = class_to_shost(dev);
+ struct pqi_ctrl_info *ctrl_info = shost_to_hba(shost);
+
+ return scnprintf(buffer, 10, "%x\n", ctrl_info->enable_r5_writes);
+}
+
+static ssize_t pqi_host_enable_r5_writes_store(struct device *dev,
+ struct device_attribute *attr, const char *buffer, size_t count)
+{
+ struct Scsi_Host *shost = class_to_shost(dev);
+ struct pqi_ctrl_info *ctrl_info = shost_to_hba(shost);
+ u8 set_r5_writes = 0;
+
+ if (kstrtou8(buffer, 0, &set_r5_writes))
+ return -EINVAL;
+
+ if (set_r5_writes > 0)
+ set_r5_writes = 1;
+
+ ctrl_info->enable_r5_writes = set_r5_writes;
+
+ return count;
+}
+
+static ssize_t pqi_host_enable_r6_writes_show(struct device *dev,
+ struct device_attribute *attr, char *buffer)
+{
+ struct Scsi_Host *shost = class_to_shost(dev);
+ struct pqi_ctrl_info *ctrl_info = shost_to_hba(shost);
+
+ return scnprintf(buffer, 10, "%x\n", ctrl_info->enable_r6_writes);
+}
+
+static ssize_t pqi_host_enable_r6_writes_store(struct device *dev,
+ struct device_attribute *attr, const char *buffer, size_t count)
+{
+ struct Scsi_Host *shost = class_to_shost(dev);
+ struct pqi_ctrl_info *ctrl_info = shost_to_hba(shost);
+ u8 set_r6_writes = 0;
+
+ if (kstrtou8(buffer, 0, &set_r6_writes))
+ return -EINVAL;
+
+ if (set_r6_writes > 0)
+ set_r6_writes = 1;
+
+ ctrl_info->enable_r6_writes = set_r6_writes;
+
+ return count;
+}
+
static DEVICE_ATTR(driver_version, 0444, pqi_driver_version_show, NULL);
static DEVICE_ATTR(firmware_version, 0444, pqi_firmware_version_show, NULL);
static DEVICE_ATTR(model, 0444, pqi_model_show, NULL);
static DEVICE_ATTR(rescan, 0200, NULL, pqi_host_rescan_store);
static DEVICE_ATTR(lockup_action, 0644,
pqi_lockup_action_show, pqi_lockup_action_store);
+static DEVICE_ATTR(enable_r5_writes, 0644,
+ pqi_host_enable_r5_writes_show, pqi_host_enable_r5_writes_store);
+static DEVICE_ATTR(enable_r6_writes, 0644,
+ pqi_host_enable_r6_writes_show, pqi_host_enable_r6_writes_store);
static struct device_attribute *pqi_shost_attrs[] = {
&dev_attr_driver_version,
&dev_attr_vendor,
&dev_attr_rescan,
&dev_attr_lockup_action,
+ &dev_attr_enable_r5_writes,
+ &dev_attr_enable_r6_writes,
NULL
};
projects / linux-2.6-block.git / commitdiff