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Commit 0b48d12d authored by sumit.saxena@avagotech.com's avatar sumit.saxena@avagotech.com Committed by Martin K. Petersen
Browse files

megaraid_sas: Make PI enabled VD 8 byte DMA aligned 



Signed-off-by: default avatarSumit Saxena <sumit.saxena@avagotech.com>
Signed-off-by: default avatarKashyap Desai <kashyap.desai@avagotech.com>
Reviewed-by: default avatarTomas Henzl <thenzl@redhat.com>
Signed-off-by: default avatarMartin K. Petersen <martin.petersen@oracle.com>
parent 91626c27

drivers/scsi/megaraid/megaraid_sas_base.c

+34 −0
Original line number Diff line number Diff line
@@ -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.

	 */