diff options
Diffstat (limited to 'drivers/scsi/ufs')
| -rw-r--r-- | drivers/scsi/ufs/ufshcd.c | 15 | ||||
| -rw-r--r-- | drivers/scsi/ufs/ufshci.h | 5 |
2 files changed, 20 insertions, 0 deletions
diff --git a/drivers/scsi/ufs/ufshcd.c b/drivers/scsi/ufs/ufshcd.c index f189e8a6cb1e..af1bffc1eac8 100644 --- a/drivers/scsi/ufs/ufshcd.c +++ b/drivers/scsi/ufs/ufshcd.c @@ -2043,6 +2043,20 @@ int ufshcd_change_queue_depth(struct scsi_device *sdev, int depth, int reason) } /** + * ufshcd_slave_configure - adjust SCSI device configurations + * @sdev: pointer to SCSI device + */ +static int ufshcd_slave_configure(struct scsi_device *sdev) +{ + struct request_queue *q = sdev->request_queue; + + blk_queue_update_dma_pad(q, PRDT_DATA_BYTE_COUNT_PAD - 1); + blk_queue_max_segment_size(q, PRDT_DATA_BYTE_COUNT_MAX); + + return 0; +} + +/** * ufshcd_slave_destroy - remove SCSI device configurations * @sdev: pointer to SCSI device */ @@ -3145,6 +3159,7 @@ static struct scsi_host_template ufshcd_driver_template = { .proc_name = UFSHCD, .queuecommand = ufshcd_queuecommand, .slave_alloc = ufshcd_slave_alloc, + .slave_configure = ufshcd_slave_configure, .slave_destroy = ufshcd_slave_destroy, .change_queue_depth = ufshcd_change_queue_depth, .eh_abort_handler = ufshcd_abort, diff --git a/drivers/scsi/ufs/ufshci.h b/drivers/scsi/ufs/ufshci.h index 9abc7e32b43d..e1b844bc9460 100644 --- a/drivers/scsi/ufs/ufshci.h +++ b/drivers/scsi/ufs/ufshci.h @@ -296,6 +296,11 @@ enum { MASK_OCS = 0x0F, }; +/* The maximum length of the data byte count field in the PRDT is 256KB */ +#define PRDT_DATA_BYTE_COUNT_MAX (256 * 1024) +/* The granularity of the data byte count field in the PRDT is 32-bit */ +#define PRDT_DATA_BYTE_COUNT_PAD 4 + /** * struct ufshcd_sg_entry - UFSHCI PRD Entry * @base_addr: Lower 32bit physical address DW-0 |