Signed-off-by: Sumit Saxena <sumit.saxena@xxxxxxxxxxxxx>
Signed-off-by: Kashyap Desai <kashyap.desai@xxxxxxxxxxxxx>
---
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 43e6193..c74d7c5 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.
*/
--
1.7.1
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