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megaraid_sas: Make PI enabled VD 8 byte DMA aligned
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>
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1 changed files with 34 additions and 0 deletions
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@ -1725,8 +1725,42 @@ static struct megasas_instance *megasas_lookup_instance(u16 host_no)
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return NULL;
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}
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/*
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* megasas_set_dma_alignment - Set DMA alignment for PI enabled VD
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*
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* @sdev: OS provided scsi device
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*
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* Returns void
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*/
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static void megasas_set_dma_alignment(struct scsi_device *sdev)
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{
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u32 device_id, ld;
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struct megasas_instance *instance;
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struct fusion_context *fusion;
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struct MR_LD_RAID *raid;
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struct MR_DRV_RAID_MAP_ALL *local_map_ptr;
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instance = megasas_lookup_instance(sdev->host->host_no);
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fusion = instance->ctrl_context;
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if (!fusion)
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return;
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if (sdev->channel >= MEGASAS_MAX_PD_CHANNELS) {
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device_id = ((sdev->channel % 2) * MEGASAS_MAX_DEV_PER_CHANNEL)
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+ sdev->id;
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local_map_ptr = fusion->ld_drv_map[(instance->map_id & 1)];
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ld = MR_TargetIdToLdGet(device_id, local_map_ptr);
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raid = MR_LdRaidGet(ld, local_map_ptr);
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if (raid->capability.ldPiMode == MR_PROT_INFO_TYPE_CONTROLLER)
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blk_queue_update_dma_alignment(sdev->request_queue, 0x7);
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}
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}
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static int megasas_slave_configure(struct scsi_device *sdev)
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{
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megasas_set_dma_alignment(sdev);
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/*
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* The RAID firmware may require extended timeouts.
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*/
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