diff options
Diffstat (limited to 'drivers/scsi/megaraid')
| -rw-r--r-- | drivers/scsi/megaraid/megaraid_sas_base.c | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/drivers/scsi/megaraid/megaraid_sas_base.c b/drivers/scsi/megaraid/megaraid_sas_base.c index f9ed4ef04b80..071ea1cad41c 100644 --- a/drivers/scsi/megaraid/megaraid_sas_base.c +++ b/drivers/scsi/megaraid/megaraid_sas_base.c @@ -1725,8 +1725,42 @@ static struct megasas_instance *megasas_lookup_instance(u16 host_no) return NULL; } +/* +* megasas_set_dma_alignment - Set DMA alignment for PI enabled VD +* +* @sdev: OS provided scsi device +* +* Returns void +*/ +static void megasas_set_dma_alignment(struct scsi_device *sdev) +{ + u32 device_id, ld; + struct megasas_instance *instance; + struct fusion_context *fusion; + struct MR_LD_RAID *raid; + struct MR_DRV_RAID_MAP_ALL *local_map_ptr; + + instance = megasas_lookup_instance(sdev->host->host_no); + fusion = instance->ctrl_context; + + if (!fusion) + return; + + if (sdev->channel >= MEGASAS_MAX_PD_CHANNELS) { + device_id = ((sdev->channel % 2) * MEGASAS_MAX_DEV_PER_CHANNEL) + + sdev->id; + local_map_ptr = fusion->ld_drv_map[(instance->map_id & 1)]; + ld = MR_TargetIdToLdGet(device_id, local_map_ptr); + raid = MR_LdRaidGet(ld, local_map_ptr); + + if (raid->capability.ldPiMode == MR_PROT_INFO_TYPE_CONTROLLER) + blk_queue_update_dma_alignment(sdev->request_queue, 0x7); + } +} + static int megasas_slave_configure(struct scsi_device *sdev) { + megasas_set_dma_alignment(sdev); /* * The RAID firmware may require extended timeouts. */ |