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authorAndrey Smirnov <andrew.smirnov@gmail.com>2019-03-07 00:00:23 -0800
committerSascha Hauer <s.hauer@pengutronix.de>2019-03-11 08:11:18 +0100
commitbdf6d51a5b58bf174ac604f41cdb5f70d97b05e7 (patch)
treef4b81aa275b87fbfbb2d2b652a1097747a80df94 /drivers
parent606503e72e2a94b5ea01741e4882c35e6d2572de (diff)
downloadbarebox-bdf6d51a5b58bf174ac604f41cdb5f70d97b05e7.tar.gz
usb: storage: Drop struct SCSI_cmd_block
All the info we need to pass to transport function can be captured in a struct us_blk_dev and two byte arrays, so having a dedicated struct with many unused fields doesn't really buy us anything. Drop the struct and convert the rest of the code to pass needed data explicitly. Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/usb/storage/transport.c30
-rw-r--r--drivers/usb/storage/transport.h2
-rw-r--r--drivers/usb/storage/usb.c100
-rw-r--r--drivers/usb/storage/usb.h8
4 files changed, 65 insertions, 75 deletions
diff --git a/drivers/usb/storage/transport.c b/drivers/usb/storage/transport.c
index cd66d2b..48ccee2 100644
--- a/drivers/usb/storage/transport.c
+++ b/drivers/usb/storage/transport.c
@@ -91,8 +91,11 @@ int usb_stor_Bulk_max_lun(struct us_data *us)
return ret;
}
-int usb_stor_Bulk_transport(ccb *srb, struct us_data *us)
+int usb_stor_Bulk_transport(struct us_blk_dev *usb_blkdev,
+ const u8 *cmd, u8 cmdlen,
+ void *data, u32 datalen)
{
+ struct us_data *us = usb_blkdev->us;
struct device_d *dev = &us->pusb_dev->dev;
struct bulk_cb_wrap cbw;
struct bulk_cs_wrap csw;
@@ -101,20 +104,18 @@ int usb_stor_Bulk_transport(ccb *srb, struct us_data *us)
unsigned int residue;
unsigned int pipein = usb_rcvbulkpipe(us->pusb_dev, us->recv_bulk_ep);
unsigned int pipeout = usb_sndbulkpipe(us->pusb_dev, us->send_bulk_ep);
- int dir_in = US_DIRECTION(srb->cmd[0]);
-
- srb->trans_bytes = 0;
+ int dir_in = US_DIRECTION(cmd[0]);
/* set up the command wrapper */
cbw.Signature = cpu_to_le32(US_BULK_CB_SIGN);
- cbw.DataTransferLength = cpu_to_le32(srb->datalen);
+ cbw.DataTransferLength = cpu_to_le32(datalen);
cbw.Flags = (dir_in ? US_BULK_FLAG_IN : US_BULK_FLAG_OUT);
cbw.Tag = ++cbw_tag;
- cbw.Lun = srb->lun;
- cbw.Length = srb->cmdlen;
+ cbw.Lun = usb_blkdev->lun;
+ cbw.Length = cmdlen;
/* copy the command payload */
- memcpy(cbw.CDB, srb->cmd, cbw.Length);
+ memcpy(cbw.CDB, cmd, cbw.Length);
/* send it to out endpoint */
dev_dbg(dev, "Bulk Command S 0x%x T 0x%x L %d F %d Trg %d LUN %d CL %d\n",
@@ -136,10 +137,10 @@ int usb_stor_Bulk_transport(ccb *srb, struct us_data *us)
mdelay(1);
data_actlen = 0;
- if (srb->datalen) {
+ if (datalen) {
unsigned int pipe = dir_in ? pipein : pipeout;
- result = usb_bulk_msg(us->pusb_dev, pipe, srb->pdata,
- srb->datalen, &data_actlen, USB_BULK_TO);
+ result = usb_bulk_msg(us->pusb_dev, pipe, data,
+ datalen, &data_actlen, USB_BULK_TO);
dev_dbg(dev, "Bulk data transfer result 0x%x\n", result);
/* special handling of STALL in DATA phase */
if ((result < 0) && (us->pusb_dev->status & USB_ST_STALLED)) {
@@ -194,15 +195,14 @@ int usb_stor_Bulk_transport(ccb *srb, struct us_data *us)
dev_dbg(dev, "Status >= phase\n");
usb_stor_Bulk_reset(us);
return USB_STOR_TRANSPORT_ERROR;
- } else if (residue > srb->datalen) {
- dev_dbg(dev, "residue (%uB) > req data (%luB)\n",
- residue, srb->datalen);
+ } else if (residue > datalen) {
+ dev_dbg(dev, "residue (%uB) > req data (%uB)\n",
+ residue, datalen);
return USB_STOR_TRANSPORT_FAILED;
} else if (csw.Status == US_BULK_STAT_FAIL) {
dev_dbg(dev, "FAILED\n");
return USB_STOR_TRANSPORT_FAILED;
}
- srb->trans_bytes = min(srb->datalen - residue, (ulong)data_actlen);
return 0;
}
diff --git a/drivers/usb/storage/transport.h b/drivers/usb/storage/transport.h
index bc8a769..22d7dea 100644
--- a/drivers/usb/storage/transport.h
+++ b/drivers/usb/storage/transport.h
@@ -84,7 +84,7 @@ struct bulk_cs_wrap {
struct us_data;
-extern int usb_stor_Bulk_transport(ccb *, struct us_data *);
+extern trans_cmnd usb_stor_Bulk_transport;
extern int usb_stor_Bulk_max_lun(struct us_data *);
extern int usb_stor_Bulk_reset(struct us_data *);
diff --git a/drivers/usb/storage/usb.c b/drivers/usb/storage/usb.c
index 69de9eb..849bce5 100644
--- a/drivers/usb/storage/usb.c
+++ b/drivers/usb/storage/usb.c
@@ -42,22 +42,19 @@ static int usb_stor_inquiry(struct us_blk_dev *usb_blkdev)
struct us_data *us = usb_blkdev->us;
struct device_d *dev = &us->pusb_dev->dev;
int retries, result;
- ccb srb;
- u8 *data = xzalloc(36);
-
- srb.lun = usb_blkdev->lun;
- srb.pdata = data;
- srb.datalen = 36;
+ u8 cmd[6];
+ const u32 datalen = 36;
+ u8 *data = xzalloc(datalen);
retries = 3;
do {
dev_dbg(dev, "SCSI_INQUIRY\n");
- memset(&srb.cmd[0], 0, 6);
- srb.cmdlen = 6;
- srb.cmd[0] = SCSI_INQUIRY;
- srb.cmd[3] = (u8)(srb.datalen >> 8);
- srb.cmd[4] = (u8)(srb.datalen >> 0);
- result = us->transport(&srb, us);
+ memset(cmd, 0, sizeof(cmd));
+ cmd[0] = SCSI_INQUIRY;
+ cmd[3] = (u8)(datalen >> 8);
+ cmd[4] = (u8)(datalen >> 0);
+ result = us->transport(usb_blkdev, cmd, sizeof(cmd),
+ data, datalen);
dev_dbg(dev, "SCSI_INQUIRY returns %d\n", result);
if (result == USB_STOR_TRANSPORT_GOOD) {
dev_dbg(dev, "Peripheral type: %x, removable: %x\n",
@@ -80,19 +77,16 @@ static int usb_stor_request_sense(struct us_blk_dev *usb_blkdev)
{
struct us_data *us = usb_blkdev->us;
struct device_d *dev = &us->pusb_dev->dev;
- ccb srb;
- u8 *data = xzalloc(18);
-
- srb.lun = usb_blkdev->lun;
+ u8 cmd[6];
+ const u8 datalen = 18;
+ u8 *data = xzalloc(datalen);
dev_dbg(dev, "SCSI_REQ_SENSE\n");
- srb.pdata = data;
- srb.datalen = 18;
- memset(&srb.cmd[0], 0, 6);
- srb.cmdlen = 6;
- srb.cmd[0] = SCSI_REQ_SENSE;
- srb.cmd[4] = (u8)(srb.datalen >> 0);
- us->transport(&srb, us);
+
+ memset(cmd, 0, sizeof(cmd));
+ cmd[0] = SCSI_REQ_SENSE;
+ cmd[4] = datalen;
+ us->transport(usb_blkdev, cmd, sizeof(cmd), data, datalen);
dev_dbg(dev, "Request Sense returned %02X %02X %02X\n",
data[2], data[12], data[13]);
@@ -105,19 +99,16 @@ static int usb_stor_test_unit_ready(struct us_blk_dev *usb_blkdev)
{
struct us_data *us = usb_blkdev->us;
struct device_d *dev = &us->pusb_dev->dev;
+ u8 cmd[12];
int retries, result;
- ccb srb;
-
- srb.lun = usb_blkdev->lun;
retries = 10;
do {
dev_dbg(dev, "SCSI_TST_U_RDY\n");
- memset(&srb.cmd[0], 0, 12);
- srb.cmdlen = 12;
- srb.cmd[0] = SCSI_TST_U_RDY;
- srb.datalen = 0;
- result = us->transport(&srb, us);
+ memset(cmd, 0, sizeof(cmd));
+ cmd[0] = SCSI_TST_U_RDY;
+ result = us->transport(usb_blkdev, cmd, sizeof(cmd),
+ NULL, 0);
dev_dbg(dev, "SCSI_TST_U_RDY returns %d\n", result);
if (result == USB_STOR_TRANSPORT_GOOD)
return 0;
@@ -134,19 +125,18 @@ static int usb_stor_read_capacity(struct us_blk_dev *usb_blkdev,
struct us_data *us = usb_blkdev->us;
struct device_d *dev = &us->pusb_dev->dev;
int retries, result;
- ccb srb;
- u32 *data = xzalloc(8);
+ const u32 datalen = 8;
+ u32 *data = xzalloc(datalen);
+ u8 cmd[10];
retries = 3;
do {
dev_dbg(dev, "SCSI_RD_CAPAC\n");
- memset(&srb.cmd[0], 0, 10);
- srb.cmdlen = 10;
- srb.lun = usb_blkdev->lun;
- srb.cmd[0] = SCSI_RD_CAPAC;
- srb.pdata = (void *)data;
- srb.datalen = 8;
- result = us->transport(&srb, us);
+ memset(cmd, 0, sizeof(cmd));
+ cmd[0] = SCSI_RD_CAPAC;
+
+ result = us->transport(usb_blkdev, cmd, sizeof(cmd), data,
+ datalen);
dev_dbg(dev, "SCSI_RD_CAPAC returns %d\n", result);
if (result == USB_STOR_TRANSPORT_GOOD) {
@@ -163,30 +153,28 @@ static int usb_stor_read_capacity(struct us_blk_dev *usb_blkdev,
return result ? -EIO : 0;
}
-static int usb_stor_io_10(struct us_blk_dev *usb_blkdev, u8 cmd,
+static int usb_stor_io_10(struct us_blk_dev *usb_blkdev, u8 opcode,
unsigned long start, u8 *data,
unsigned short blocks)
{
struct us_data *us = usb_blkdev->us;
int retries, result;
- ccb srb;
-
- srb.lun = usb_blkdev->lun;
- srb.pdata = data;
- srb.datalen = blocks * SECTOR_SIZE;
+ const u32 datalen = blocks * SECTOR_SIZE;
+ u8 cmd[10];
retries = 2;
do {
- memset(&srb.cmd[0], 0, 10);
- srb.cmdlen = 10;
- srb.cmd[0] = cmd;
- srb.cmd[2] = (u8)(start >> 24);
- srb.cmd[3] = (u8)(start >> 16);
- srb.cmd[4] = (u8)(start >> 8);
- srb.cmd[5] = (u8)(start >> 0);
- srb.cmd[7] = (u8)(blocks >> 8);
- srb.cmd[8] = (u8)(blocks >> 0);
- result = us->transport(&srb, us);
+ memset(cmd, 0, sizeof(cmd));
+
+ cmd[0] = opcode;
+ cmd[2] = (u8)(start >> 24);
+ cmd[3] = (u8)(start >> 16);
+ cmd[4] = (u8)(start >> 8);
+ cmd[5] = (u8)(start >> 0);
+ cmd[7] = (u8)(blocks >> 8);
+ cmd[8] = (u8)(blocks >> 0);
+ result = us->transport(usb_blkdev, cmd, sizeof(cmd),
+ data, datalen);
if (result == USB_STOR_TRANSPORT_GOOD)
return 0;
usb_stor_request_sense(usb_blkdev);
diff --git a/drivers/usb/storage/usb.h b/drivers/usb/storage/usb.h
index 5445370..3aff15d 100644
--- a/drivers/usb/storage/usb.h
+++ b/drivers/usb/storage/usb.h
@@ -44,8 +44,11 @@
struct us_data;
+struct us_blk_dev;
-typedef int (*trans_cmnd)(ccb *cb, struct us_data *data);
+typedef int (trans_cmnd)(struct us_blk_dev *usb_blkdev,
+ const u8 *cmd, u8 cmdlen,
+ void *data, u32 datalen);
typedef int (*trans_reset)(struct us_data *data);
/* one us_data object allocated per usb storage device */
@@ -65,11 +68,10 @@ struct us_data {
char *transport_name;
- trans_cmnd transport; /* transport function */
+ trans_cmnd *transport; /* transport function */
trans_reset transport_reset;/* transport device reset */
/* SCSI interfaces */
- ccb *srb; /* current srb */
struct list_head blk_dev_list;
};