diff --git a/drivers/scsi/smartpqi/smartpqi.h b/drivers/scsi/smartpqi/smartpqi.h index 6639432f3dab..976bfd8c5192 100644 --- a/drivers/scsi/smartpqi/smartpqi.h +++ b/drivers/scsi/smartpqi/smartpqi.h @@ -1043,6 +1043,13 @@ struct pqi_scsi_dev_raid_map_data { #define RAID_CTLR_LUNID "\0\0\0\0\0\0\0\0" +#define NUM_STREAMS_PER_LUN 8 + +struct pqi_stream_data { + u64 next_lba; + u32 last_accessed; +}; + struct pqi_scsi_dev { int devtype; /* as reported by INQUIRY commmand */ u8 device_type; /* as reported by */ @@ -1097,6 +1104,7 @@ struct pqi_scsi_dev { struct list_head add_list_entry; struct list_head delete_list_entry; + struct pqi_stream_data stream_data[NUM_STREAMS_PER_LUN]; atomic_t scsi_cmds_outstanding; atomic_t raid_bypass_cnt; }; @@ -1296,6 +1304,7 @@ struct pqi_ctrl_info { u8 enable_r5_writes : 1; u8 enable_r6_writes : 1; u8 lv_drive_type_mix_valid : 1; + u8 enable_stream_detection : 1; u8 ciss_report_log_flags; u32 max_transfer_encrypted_sas_sata; diff --git a/drivers/scsi/smartpqi/smartpqi_init.c b/drivers/scsi/smartpqi/smartpqi_init.c index 143bb7b64095..27bd3d9a3810 100644 --- a/drivers/scsi/smartpqi/smartpqi_init.c +++ b/drivers/scsi/smartpqi/smartpqi_init.c @@ -5688,8 +5688,82 @@ void pqi_prep_for_scsi_done(struct scsi_cmnd *scmd) atomic_dec(&device->scsi_cmds_outstanding); } -static int pqi_scsi_queue_command(struct Scsi_Host *shost, +static bool pqi_is_parity_write_stream(struct pqi_ctrl_info *ctrl_info, struct scsi_cmnd *scmd) +{ + u32 oldest_jiffies; + u8 lru_index; + int i; + int rc; + struct pqi_scsi_dev *device; + struct pqi_stream_data *pqi_stream_data; + struct pqi_scsi_dev_raid_map_data rmd; + + if (!ctrl_info->enable_stream_detection) + return false; + + rc = pqi_get_aio_lba_and_block_count(scmd, &rmd); + if (rc) + return false; + + /* Check writes only. */ + if (!rmd.is_write) + return false; + + device = scmd->device->hostdata; + + /* Check for RAID 5/6 streams. */ + if (device->raid_level != SA_RAID_5 && device->raid_level != SA_RAID_6) + return false; + + /* + * If controller does not support AIO RAID{5,6} writes, need to send + * requests down non-AIO path. + */ + if ((device->raid_level == SA_RAID_5 && !ctrl_info->enable_r5_writes) || + (device->raid_level == SA_RAID_6 && !ctrl_info->enable_r6_writes)) + return true; + + lru_index = 0; + oldest_jiffies = INT_MAX; + for (i = 0; i < NUM_STREAMS_PER_LUN; i++) { + pqi_stream_data = &device->stream_data[i]; + /* + * Check for adjacent request or request is within + * the previous request. + */ + if ((pqi_stream_data->next_lba && + rmd.first_block >= pqi_stream_data->next_lba) && + rmd.first_block <= pqi_stream_data->next_lba + + rmd.block_cnt) { + pqi_stream_data->next_lba = rmd.first_block + + rmd.block_cnt; + pqi_stream_data->last_accessed = jiffies; + return true; + } + + /* unused entry */ + if (pqi_stream_data->last_accessed == 0) { + lru_index = i; + break; + } + + /* Find entry with oldest last accessed time. */ + if (pqi_stream_data->last_accessed <= oldest_jiffies) { + oldest_jiffies = pqi_stream_data->last_accessed; + lru_index = i; + } + } + + /* Set LRU entry. */ + pqi_stream_data = &device->stream_data[lru_index]; + pqi_stream_data->last_accessed = jiffies; + pqi_stream_data->next_lba = rmd.first_block + rmd.block_cnt; + + return false; +} + +static int pqi_scsi_queue_command(struct Scsi_Host *shost, struct scsi_cmnd *scmd) { int rc; struct pqi_ctrl_info *ctrl_info; @@ -5736,11 +5810,12 @@ static int pqi_scsi_queue_command(struct Scsi_Host *shost, raid_bypassed = false; if (device->raid_bypass_enabled && !blk_rq_is_passthrough(scmd->request)) { - rc = pqi_raid_bypass_submit_scsi_cmd(ctrl_info, device, - scmd, queue_group); - if (rc == 0 || rc == SCSI_MLQUEUE_HOST_BUSY) { - raid_bypassed = true; - atomic_inc(&device->raid_bypass_cnt); + if (!pqi_is_parity_write_stream(ctrl_info, scmd)) { + rc = pqi_raid_bypass_submit_scsi_cmd(ctrl_info, device, scmd, queue_group); + if (rc == 0 || rc == SCSI_MLQUEUE_HOST_BUSY) { + raid_bypassed = true; + atomic_inc(&device->raid_bypass_cnt); + } } } if (!raid_bypassed)