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megaraid_sas: Make PI enabled VD 8 byte DMA aligned

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Signed-off-by: Sumit Saxena <sumit.saxena@avagotech.com>
Signed-off-by: Kashyap Desai <kashyap.desai@avagotech.com>
Reviewed-by: Tomas Henzl <thenzl@redhat.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
sumit.saxena@avagotech.com 2015-10-15 13:40:44 +05:30 committed by Martin K. Petersen
parent 91626c2701
commit 0b48d12d03
1 changed files with 34 additions and 0 deletions
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34
drivers/scsi/megaraid/megaraid_sas_base.c
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@ -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.
*/