Measurements have shown that for some UFS devices the maximum sequential
I/O throughput is achieved with a transfer size above 512 KiB. Hence
increase the maximum size of the data buffer associated with a single
request from SCSI_DEFAULT_MAX_SECTORS (1024) * 512 bytes = 512 KiB into
1 GiB.
Note: the maximum data buffer size supported by the UFSHCI specification
is 65535 * 256 MiB or about 16 TiB.
Cc: Adrian Hunter <adrian.hunter@xxxxxxxxx>
Cc: Avri Altman <avri.altman@xxxxxxx>
Cc: Bean Huo <beanhuo@xxxxxxxxxx>
Cc: Stanley Chu <stanley.chu@xxxxxxxxxxxx>
Signed-off-by: Bart Van Assche <bvanassche@xxxxxxx>
---
drivers/ufs/core/ufshcd.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/ufs/core/ufshcd.c b/drivers/ufs/core/ufshcd.c
index 36b7212e9cb5..ea7e8f329d0f 100644
--- a/drivers/ufs/core/ufshcd.c
+++ b/drivers/ufs/core/ufshcd.c
@@ -8365,6 +8365,7 @@ static struct scsi_host_template ufshcd_driver_template = {
.cmd_per_lun = UFSHCD_CMD_PER_LUN,
.can_queue = UFSHCD_CAN_QUEUE,
.max_segment_size = PRDT_DATA_BYTE_COUNT_MAX,
+ .max_sectors = (1 << 30) / SECTOR_SIZE, /* 1 GiB */
.max_host_blocked = 1,
.track_queue_depth = 1,
.sdev_groups = ufshcd_driver_groups,
