Some SCSI devices like UFS use DMA for executing scsi commands and hence need to know the direction of transfer of the dma. Add a dma_dir element to the command structure to facilitate this.
Signed-off-by: Faiz Abbas faiz_abbas@ti.com --- drivers/scsi/scsi.c | 4 ++++ include/scsi.h | 3 +++ 2 files changed, 7 insertions(+)
diff --git a/drivers/scsi/scsi.c b/drivers/scsi/scsi.c index 7b7d388557..719e0fbfe6 100644 --- a/drivers/scsi/scsi.c +++ b/drivers/scsi/scsi.c @@ -167,6 +167,7 @@ static ulong scsi_read(struct udevice *dev, lbaint_t blknr, lbaint_t blkcnt, block_dev->devnum, start, blks, (unsigned long)buffer); do { pccb->pdata = (unsigned char *)buf_addr; + pccb->dma_dir = DMA_FROM_DEVICE; #ifdef CONFIG_SYS_64BIT_LBA if (start > SCSI_LBA48_READ) { unsigned long blocks; @@ -235,6 +236,7 @@ static ulong scsi_write(struct udevice *dev, lbaint_t blknr, lbaint_t blkcnt, __func__, block_dev->devnum, start, blks, (unsigned long)buffer); do { pccb->pdata = (unsigned char *)buf_addr; + pccb->dma_dir = DMA_TO_DEVICE; if (blks > SCSI_MAX_BLK) { pccb->datalen = block_dev->blksz * max_blks; smallblks = max_blks; @@ -382,6 +384,7 @@ static int scsi_read_capacity(struct udevice *dev, struct scsi_cmd *pccb, pccb->msgout[0] = SCSI_IDENTIFY; /* NOT USED */
pccb->datalen = 16; + pccb->dma_dir = DMA_FROM_DEVICE; if (scsi_exec(dev, pccb)) return 1;
@@ -484,6 +487,7 @@ static int scsi_detect_dev(struct udevice *dev, int target, int lun, pccb->lun = lun; pccb->pdata = (unsigned char *)&tempbuff; pccb->datalen = 512; + pccb->dma_dir = DMA_FROM_DEVICE; scsi_setup_inquiry(pccb); if (scsi_exec(dev, pccb)) { if (pccb->contr_stat == SCSI_SEL_TIME_OUT) { diff --git a/include/scsi.h b/include/scsi.h index 076bdbc6a0..7bb2d3ac0f 100644 --- a/include/scsi.h +++ b/include/scsi.h @@ -6,6 +6,8 @@ #ifndef _SCSI_H #define _SCSI_H
+#include <linux/dma-direction.h> + struct scsi_cmd { unsigned char cmd[16]; /* command */ /* for request sense */ @@ -26,6 +28,7 @@ struct scsi_cmd { unsigned long trans_bytes; /* tranfered bytes */
unsigned int priv; + enum dma_data_direction dma_dir; };
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