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[SCSI] convert the remaining mid-layer pieces to scsi_execute_req

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After this, we just have some drivers, all the ULDs and the SPI
transport class using scsi_wait_req().

Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
This commit is contained in:
James Bottomley
2005-08-28 11:27:01 -05:00
parent 7a93aef7fb
commit 1cf72699c1
6 changed files with 64 additions and 111 deletions
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94
drivers/scsi/scsi_lib.c
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@@ -1615,7 +1615,7 @@ void scsi_exit_queue(void)
/**
* __scsi_mode_sense - issue a mode sense, falling back from 10 to
* six bytes if necessary.
* @sreq: SCSI request to fill in with the MODE_SENSE
* @sdev: SCSI device to be queried
* @dbd: set if mode sense will allow block descriptors to be returned
* @modepage: mode page being requested
* @buffer: request buffer (may not be smaller than eight bytes)
@@ -1623,26 +1623,38 @@ void scsi_exit_queue(void)
* @timeout: command timeout
* @retries: number of retries before failing
* @data: returns a structure abstracting the mode header data
* @sense: place to put sense data (or NULL if no sense to be collected).
* must be SCSI_SENSE_BUFFERSIZE big.
*
* Returns zero if unsuccessful, or the header offset (either 4
* or 8 depending on whether a six or ten byte command was
* issued) if successful.
**/
int
__scsi_mode_sense(struct scsi_request *sreq, int dbd, int modepage,
scsi_mode_sense(struct scsi_device *sdev, int dbd, int modepage,
unsigned char *buffer, int len, int timeout, int retries,
struct scsi_mode_data *data) {
struct scsi_mode_data *data, char *sense) {
unsigned char cmd[12];
int use_10_for_ms;
int header_length;
int result;
char *sense_buffer = NULL;
memset(data, 0, sizeof(*data));
memset(&cmd[0], 0, 12);
cmd[1] = dbd & 0x18; /* allows DBD and LLBA bits */
cmd[2] = modepage;
if (!sense) {
sense_buffer = kmalloc(SCSI_SENSE_BUFFERSIZE, GFP_KERNEL);
if (!sense_buffer) {
dev_printk(KERN_ERR, &sdev->sdev_gendev, "failed to allocate sense buffer\n");
return 0;
}
sense = sense_buffer;
}
retry:
use_10_for_ms = sreq->sr_device->use_10_for_ms;
use_10_for_ms = sdev->use_10_for_ms;
if (use_10_for_ms) {
if (len < 8)
@@ -1660,36 +1672,35 @@ __scsi_mode_sense(struct scsi_request *sreq, int dbd, int modepage,
header_length = 4;
}
sreq->sr_cmd_len = 0;
memset(sreq->sr_sense_buffer, 0, sizeof(sreq->sr_sense_buffer));
sreq->sr_data_direction = DMA_FROM_DEVICE;
memset(sense, 0, SCSI_SENSE_BUFFERSIZE);
memset(buffer, 0, len);
scsi_wait_req(sreq, cmd, buffer, len, timeout, retries);
result = scsi_execute_req(sdev, cmd, DMA_FROM_DEVICE, buffer, len,
sense, timeout, retries);
/* This code looks awful: what it's doing is making sure an
* ILLEGAL REQUEST sense return identifies the actual command
* byte as the problem. MODE_SENSE commands can return
* ILLEGAL REQUEST if the code page isn't supported */
if (use_10_for_ms && !scsi_status_is_good(sreq->sr_result) &&
(driver_byte(sreq->sr_result) & DRIVER_SENSE)) {
if (use_10_for_ms && !scsi_status_is_good(result) &&
(driver_byte(result) & DRIVER_SENSE)) {
struct scsi_sense_hdr sshdr;
if (scsi_request_normalize_sense(sreq, &sshdr)) {
if (scsi_normalize_sense(sense, SCSI_SENSE_BUFFERSIZE, &sshdr)) {
if ((sshdr.sense_key == ILLEGAL_REQUEST) &&
(sshdr.asc == 0x20) && (sshdr.ascq == 0)) {
/*
* Invalid command operation code
*/
sreq->sr_device->use_10_for_ms = 0;
sdev->use_10_for_ms = 0;
goto retry;
}
}
}
if(scsi_status_is_good(sreq->sr_result)) {
if(scsi_status_is_good(result)) {
data->header_length = header_length;
if(use_10_for_ms) {
data->length = buffer[0]*256 + buffer[1] + 2;
@@ -1706,73 +1717,34 @@ __scsi_mode_sense(struct scsi_request *sreq, int dbd, int modepage,
}
}
return sreq->sr_result;
}
EXPORT_SYMBOL(__scsi_mode_sense);
/**
* scsi_mode_sense - issue a mode sense, falling back from 10 to
* six bytes if necessary.
* @sdev: scsi device to send command to.
* @dbd: set if mode sense will disable block descriptors in the return
* @modepage: mode page being requested
* @buffer: request buffer (may not be smaller than eight bytes)
* @len: length of request buffer.
* @timeout: command timeout
* @retries: number of retries before failing
*
* Returns zero if unsuccessful, or the header offset (either 4
* or 8 depending on whether a six or ten byte command was
* issued) if successful.
**/
int
scsi_mode_sense(struct scsi_device *sdev, int dbd, int modepage,
unsigned char *buffer, int len, int timeout, int retries,
struct scsi_mode_data *data)
{
struct scsi_request *sreq = scsi_allocate_request(sdev, GFP_KERNEL);
int ret;
if (!sreq)
return -1;
ret = __scsi_mode_sense(sreq, dbd, modepage, buffer, len,
timeout, retries, data);
scsi_release_request(sreq);
return ret;
kfree(sense_buffer);
return result;
}
EXPORT_SYMBOL(scsi_mode_sense);
int
scsi_test_unit_ready(struct scsi_device *sdev, int timeout, int retries)
{
struct scsi_request *sreq;
char cmd[] = {
TEST_UNIT_READY, 0, 0, 0, 0, 0,
};
char sense[SCSI_SENSE_BUFFERSIZE];
int result;
sreq = scsi_allocate_request(sdev, GFP_KERNEL);
if (!sreq)
return -ENOMEM;
result = scsi_execute_req(sdev, cmd, DMA_NONE, NULL, 0, sense,
timeout, retries);
sreq->sr_data_direction = DMA_NONE;
scsi_wait_req(sreq, cmd, NULL, 0, timeout, retries);
if ((driver_byte(sreq->sr_result) & DRIVER_SENSE) && sdev->removable) {
if ((driver_byte(result) & DRIVER_SENSE) && sdev->removable) {
struct scsi_sense_hdr sshdr;
if ((scsi_request_normalize_sense(sreq, &sshdr)) &&
if ((scsi_normalize_sense(sense, SCSI_SENSE_BUFFERSIZE,
&sshdr)) &&
((sshdr.sense_key == UNIT_ATTENTION) ||
(sshdr.sense_key == NOT_READY))) {
sdev->changed = 1;
sreq->sr_result = 0;
result = 0;
}
}
result = sreq->sr_result;
scsi_release_request(sreq);
return result;
}
EXPORT_SYMBOL(scsi_test_unit_ready);