scsi: Add dma direction member to command structure
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>
diff --git a/drivers/scsi/scsi.c b/drivers/scsi/scsi.c
index 0639eb6..69de6a53 100644
--- a/drivers/scsi/scsi.c
+++ b/drivers/scsi/scsi.c
@@ -169,6 +169,7 @@
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;
@@ -237,6 +238,7 @@
__func__, block_dev->devnum, start, blks, (unsigned long)buffer);
do {
pccb->pdata = (unsigned char *)buf_addr;
+ pccb->dma_dir = DMA_TO_DEVICE;
if (blks > max_blks) {
pccb->datalen = block_dev->blksz * max_blks;
smallblks = max_blks;
@@ -385,6 +387,7 @@
pccb->msgout[0] = SCSI_IDENTIFY; /* NOT USED */
pccb->datalen = 16;
+ pccb->dma_dir = DMA_FROM_DEVICE;
if (scsi_exec(dev, pccb))
return 1;
@@ -487,6 +490,7 @@
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 963abe2..61da958 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 @@
unsigned long trans_bytes; /* tranfered bytes */
unsigned int priv;
+ enum dma_data_direction dma_dir;
};
/*-----------------------------------------------------------