This one's slightly more difficult. The transport class uses
REQ_FAILFAST, so another interface (scsi_execute) had to be invented to
take the extra flag. Also, the sense functions are shifted around to
allow spi_execute to place data directly into a struct scsi_sense_hdr.
With this change, there's probably a lot of unnecessary sense buffer
allocation going on which we can fix later.
James
--- a/drivers/scsi/scsi_error.c
+++ b/drivers/scsi/scsi_error.c
@@ -1909,12 +1909,16 @@ EXPORT_SYMBOL(scsi_reset_provider);
int scsi_normalize_sense(const u8 *sense_buffer, int sb_len,
struct scsi_sense_hdr *sshdr)
{
- if (!sense_buffer || !sb_len || (sense_buffer[0] & 0x70) != 0x70)
+ if (!sense_buffer || !sb_len)
return 0;
memset(sshdr, 0, sizeof(struct scsi_sense_hdr));
sshdr->response_code = (sense_buffer[0] & 0x7f);
+
+ if (!scsi_sense_valid(sshdr))
+ return 0;
+
if (sshdr->response_code >= 0x72) {
/*
* descriptor format
--- a/drivers/scsi/scsi_lib.c
+++ b/drivers/scsi/scsi_lib.c
@@ -285,7 +285,7 @@ void scsi_wait_req(struct scsi_request *
EXPORT_SYMBOL(scsi_wait_req);
/**
- * scsi_execute_req - insert request and wait for the result
+ * scsi_execute - insert request and wait for the result
* @sdev: scsi device
* @cmd: scsi command
* @data_direction: data direction
@@ -294,13 +294,14 @@ EXPORT_SYMBOL(scsi_wait_req);
* @sense: optional sense buffer
* @timeout: request timeout in seconds
* @retries: number of times to retry request
+ * @flags: or into request flags;
*
* scsi_execute_req returns the req->errors value which is the
* the scsi_cmnd result field.
**/
-int scsi_execute_req(struct scsi_device *sdev, unsigned char *cmd,
- int data_direction, void *buffer, unsigned bufflen,
- unsigned char *sense, int timeout, int retries)
+int scsi_execute(struct scsi_device *sdev, const unsigned char *cmd,
+ int data_direction, void *buffer, unsigned bufflen,
+ unsigned char *sense, int timeout, int retries, int flags)
{
struct request *req;
int ret;
@@ -326,7 +327,7 @@ int scsi_execute_req(struct scsi_device
req->sense = sense;
req->sense_len = 0;
req->timeout = timeout;
- req->flags |= REQ_BLOCK_PC | REQ_SPECIAL;
+ req->flags |= flags | REQ_BLOCK_PC | REQ_SPECIAL;
/*
* head injection *required* here otherwise quiesce won't work
@@ -339,7 +340,7 @@ int scsi_execute_req(struct scsi_device
return ret;
}
-EXPORT_SYMBOL(scsi_execute_req);
+EXPORT_SYMBOL(scsi_execute);
/*
* Function: scsi_init_cmd_errh()
--- a/drivers/scsi/scsi_transport_spi.c
+++ b/drivers/scsi/scsi_transport_spi.c
@@ -28,7 +28,7 @@
#include "scsi_priv.h"
#include <scsi/scsi_device.h>
#include <scsi/scsi_host.h>
-#include <scsi/scsi_request.h>
+#include <scsi/scsi_cmnd.h>
#include <scsi/scsi_eh.h>
#include <scsi/scsi_transport.h>
#include <scsi/scsi_transport_spi.h>
@@ -108,25 +108,33 @@ static int sprint_frac(char *dest, int v
/* Modification of scsi_wait_req that will clear UNIT ATTENTION conditions
* resulting from (likely) bus and device resets */
-static void spi_wait_req(struct scsi_request *sreq, const void *cmd,
- void *buffer, unsigned bufflen)
+static int spi_execute(struct scsi_device *sdev, const void *cmd,
+ enum dma_data_direction dir,
+ void *buffer, unsigned bufflen,
+ struct scsi_sense_hdr *sshdr)
{
- int i;
+ int i, result;
+ unsigned char sense[SCSI_SENSE_BUFFERSIZE];
for(i = 0; i < DV_RETRIES; i++) {
- sreq->sr_request->flags |= REQ_FAILFAST;
-
- scsi_wait_req(sreq, cmd, buffer, bufflen,
- DV_TIMEOUT, /* retries */ 1);
- if (sreq->sr_result & DRIVER_SENSE) {
- struct scsi_sense_hdr sshdr;
- if (scsi_request_normalize_sense(sreq, &sshdr)
- && sshdr.sense_key == UNIT_ATTENTION)
+ /* FIXME: need to set REQ_FAILFAST */
+ result = scsi_execute(sdev, cmd, dir, buffer, bufflen,
+ sense, DV_TIMEOUT, /* retries */ 1,
+ REQ_FAILFAST);
+ if (result & DRIVER_SENSE) {
+ struct scsi_sense_hdr sshdr_tmp;
+ if (!sshdr)
+ sshdr = &sshdr_tmp;
+
+ if (scsi_normalize_sense(sense, sizeof(*sense),
+ sshdr)
+ && sshdr->sense_key == UNIT_ATTENTION)
continue;
}
break;
}
+ return result;
}
static struct {
@@ -535,13 +543,13 @@ enum spi_compare_returns {
/* This is for read/write Domain Validation: If the device supports
* an echo buffer, we do read/write tests to it */
static enum spi_compare_returns
-spi_dv_device_echo_buffer(struct scsi_request *sreq, u8 *buffer,
+spi_dv_device_echo_buffer(struct scsi_device *sdev, u8 *buffer,
u8 *ptr, const int retries)
{
- struct scsi_device *sdev = sreq->sr_device;
int len = ptr - buffer;
- int j, k, r;
+ int j, k, r, result;
unsigned int pattern = 0x0000ffff;
+ struct scsi_sense_hdr sshdr;
const char spi_write_buffer[] = {
WRITE_BUFFER, 0x0a, 0, 0, 0, 0, 0, len >> 8, len & 0xff, 0
@@ -586,14 +594,12 @@ spi_dv_device_echo_buffer(struct scsi_re
}
for (r = 0; r < retries; r++) {
- sreq->sr_cmd_len = 0; /* wait_req to fill in */
- sreq->sr_data_direction = DMA_TO_DEVICE;
- spi_wait_req(sreq, spi_write_buffer, buffer, len);
- if(sreq->sr_result || !scsi_device_online(sdev)) {
- struct scsi_sense_hdr sshdr;
+ result = spi_execute(sdev, spi_write_buffer, DMA_TO_DEVICE,
+ buffer, len, &sshdr);
+ if(result || !scsi_device_online(sdev)) {
scsi_device_set_state(sdev, SDEV_QUIESCE);
- if (scsi_request_normalize_sense(sreq, &sshdr)
+ if (scsi_sense_valid(&sshdr)
&& sshdr.sense_key == ILLEGAL_REQUEST
/* INVALID FIELD IN CDB */
&& sshdr.asc == 0x24 && sshdr.ascq == 0x00)
@@ -605,14 +611,13 @@ spi_dv_device_echo_buffer(struct scsi_re
return SPI_COMPARE_SKIP_TEST;
- SPI_PRINTK(sdev->sdev_target, KERN_ERR, "Write Buffer failure %x\n", sreq->sr_result);
+ SPI_PRINTK(sdev->sdev_target, KERN_ERR, "Write Buffer failure %x\n", result);
return SPI_COMPARE_FAILURE;
}
memset(ptr, 0, len);
- sreq->sr_cmd_len = 0; /* wait_req to fill in */
- sreq->sr_data_direction = DMA_FROM_DEVICE;
- spi_wait_req(sreq, spi_read_buffer, ptr, len);
+ spi_execute(sdev, spi_read_buffer, DMA_FROM_DEVICE,
+ ptr, len, NULL);
scsi_device_set_state(sdev, SDEV_QUIESCE);
if (memcmp(buffer, ptr, len) != 0)
@@ -624,25 +629,22 @@ spi_dv_device_echo_buffer(struct scsi_re
/* This is for the simplest form of Domain Validation: a read test
* on the inquiry data from the device */
static enum spi_compare_returns
-spi_dv_device_compare_inquiry(struct scsi_request *sreq, u8 *buffer,
+spi_dv_device_compare_inquiry(struct scsi_device *sdev, u8 *buffer,
u8 *ptr, const int retries)
{
- int r;
- const int len = sreq->sr_device->inquiry_len;
- struct scsi_device *sdev = sreq->sr_device;
+ int r, result;
+ const int len = sdev->inquiry_len;
const char spi_inquiry[] = {
INQUIRY, 0, 0, 0, len, 0
};
for (r = 0; r < retries; r++) {
- sreq->sr_cmd_len = 0; /* wait_req to fill in */
- sreq->sr_data_direction = DMA_FROM_DEVICE;
-
memset(ptr, 0, len);
- spi_wait_req(sreq, spi_inquiry, ptr, len);
+ result = spi_execute(sdev, spi_inquiry, DMA_FROM_DEVICE,
+ ptr, len, NULL);
- if(sreq->sr_result || !scsi_device_online(sdev)) {
+ if(result || !scsi_device_online(sdev)) {
scsi_device_set_state(sdev, SDEV_QUIESCE);
return SPI_COMPARE_FAILURE;
}
@@ -663,12 +665,11 @@ spi_dv_device_compare_inquiry(struct scs
}
static enum spi_compare_returns
-spi_dv_retrain(struct scsi_request *sreq, u8 *buffer, u8 *ptr,
+spi_dv_retrain(struct scsi_device *sdev, u8 *buffer, u8 *ptr,
enum spi_compare_returns
- (*compare_fn)(struct scsi_request *, u8 *, u8 *, int))
+ (*compare_fn)(struct scsi_device *, u8 *, u8 *, int))
{
- struct spi_internal *i = to_spi_internal(sreq->sr_host->transportt);
- struct scsi_device *sdev = sreq->sr_device;
+ struct spi_internal *i = to_spi_internal(sdev->host->transportt);
struct scsi_target *starget = sdev->sdev_target;
int period = 0, prevperiod = 0;
enum spi_compare_returns retval;
@@ -676,7 +677,7 @@ spi_dv_retrain(struct scsi_request *sreq
for (;;) {
int newperiod;
- retval = compare_fn(sreq, buffer, ptr, DV_LOOPS);
+ retval = compare_fn(sdev, buffer, ptr, DV_LOOPS);
if (retval == SPI_COMPARE_SUCCESS
|| retval == SPI_COMPARE_SKIP_TEST)
@@ -722,9 +723,9 @@ spi_dv_retrain(struct scsi_request *sreq
}
static int
-spi_dv_device_get_echo_buffer(struct scsi_request *sreq, u8 *buffer)
+spi_dv_device_get_echo_buffer(struct scsi_device *sdev, u8 *buffer)
{
- int l;
+ int l, result;
/* first off do a test unit ready. This can error out
* because of reservations or some other reason. If it
@@ -740,18 +741,16 @@ spi_dv_device_get_echo_buffer(struct scs
};
- sreq->sr_cmd_len = 0;
- sreq->sr_data_direction = DMA_NONE;
-
/* We send a set of three TURs to clear any outstanding
* unit attention conditions if they exist (Otherwise the
* buffer tests won't be happy). If the TUR still fails
* (reservation conflict, device not ready, etc) just
* skip the write tests */
for (l = 0; ; l++) {
- spi_wait_req(sreq, spi_test_unit_ready, NULL, 0);
+ result = spi_execute(sdev, spi_test_unit_ready, DMA_NONE,
+ NULL, 0, NULL);
- if(sreq->sr_result) {
+ if(result) {
if(l >= 3)
return 0;
} else {
@@ -760,12 +759,10 @@ spi_dv_device_get_echo_buffer(struct scs
}
}
- sreq->sr_cmd_len = 0;
- sreq->sr_data_direction = DMA_FROM_DEVICE;
+ result = spi_execute(sdev, spi_read_buffer_descriptor,
+ DMA_FROM_DEVICE, buffer, 4, NULL);
- spi_wait_req(sreq, spi_read_buffer_descriptor, buffer, 4);
-
- if (sreq->sr_result)
+ if (result)
/* Device has no echo buffer */
return 0;
@@ -773,17 +770,16 @@ spi_dv_device_get_echo_buffer(struct scs
}
static void
-spi_dv_device_internal(struct scsi_request *sreq, u8 *buffer)
+spi_dv_device_internal(struct scsi_device *sdev, u8 *buffer)
{
- struct spi_internal *i = to_spi_internal(sreq->sr_host->transportt);
- struct scsi_device *sdev = sreq->sr_device;
+ struct spi_internal *i = to_spi_internal(sdev->host->transportt);
struct scsi_target *starget = sdev->sdev_target;
int len = sdev->inquiry_len;
/* first set us up for narrow async */
DV_SET(offset, 0);
DV_SET(width, 0);
- if (spi_dv_device_compare_inquiry(sreq, buffer, buffer, DV_LOOPS)
+ if (spi_dv_device_compare_inquiry(sdev, buffer, buffer, DV_LOOPS)
!= SPI_COMPARE_SUCCESS) {
SPI_PRINTK(starget, KERN_ERR, "Domain Validation Initial Inquiry Failed\n");
/* FIXME: should probably offline the device here? */
@@ -794,7 +790,7 @@ spi_dv_device_internal(struct scsi_reque
if (i->f->set_width && spi_max_width(starget) && sdev->wdtr) {
i->f->set_width(starget, 1);
- if (spi_dv_device_compare_inquiry(sreq, buffer,
+ if (spi_dv_device_compare_inquiry(sdev, buffer,
buffer + len,
DV_LOOPS)
!= SPI_COMPARE_SUCCESS) {
@@ -815,7 +811,7 @@ spi_dv_device_internal(struct scsi_reque
len = 0;
if (sdev->ppr)
- len = spi_dv_device_get_echo_buffer(sreq, buffer);
+ len = spi_dv_device_get_echo_buffer(sdev, buffer);
retry:
@@ -839,7 +835,7 @@ spi_dv_device_internal(struct scsi_reque
if (len == 0) {
SPI_PRINTK(starget, KERN_INFO, "Domain Validation skipping write tests\n");
- spi_dv_retrain(sreq, buffer, buffer + len,
+ spi_dv_retrain(sdev, buffer, buffer + len,
spi_dv_device_compare_inquiry);
return;
}
@@ -849,7 +845,7 @@ spi_dv_device_internal(struct scsi_reque
len = SPI_MAX_ECHO_BUFFER_SIZE;
}
- if (spi_dv_retrain(sreq, buffer, buffer + len,
+ if (spi_dv_retrain(sdev, buffer, buffer + len,
spi_dv_device_echo_buffer)
== SPI_COMPARE_SKIP_TEST) {
/* OK, the stupid drive can't do a write echo buffer
@@ -872,16 +868,12 @@ spi_dv_device_internal(struct scsi_reque
void
spi_dv_device(struct scsi_device *sdev)
{
- struct scsi_request *sreq = scsi_allocate_request(sdev, GFP_KERNEL);
struct scsi_target *starget = sdev->sdev_target;
u8 *buffer;
const int len = SPI_MAX_ECHO_BUFFER_SIZE*2;
- if (unlikely(!sreq))
- return;
-
if (unlikely(scsi_device_get(sdev)))
- goto out_free_req;
+ return;
buffer = kmalloc(len, GFP_KERNEL);
@@ -902,7 +894,7 @@ spi_dv_device(struct scsi_device *sdev)
SPI_PRINTK(starget, KERN_INFO, "Beginning Domain Validation\n");
- spi_dv_device_internal(sreq, buffer);
+ spi_dv_device_internal(sdev, buffer);
SPI_PRINTK(starget, KERN_INFO, "Ending Domain Validation\n");
@@ -917,8 +909,6 @@ spi_dv_device(struct scsi_device *sdev)
kfree(buffer);
out_put:
scsi_device_put(sdev);
- out_free_req:
- scsi_release_request(sreq);
}
EXPORT_SYMBOL(spi_dv_device);
--- a/include/scsi/scsi_device.h
+++ b/include/scsi/scsi_device.h
@@ -254,6 +254,19 @@ extern void scsi_remove_target(struct de
extern const char *scsi_device_state_name(enum scsi_device_state);
extern int scsi_is_sdev_device(const struct device *);
extern int scsi_is_target_device(const struct device *);
+extern int scsi_execute(struct scsi_device *sdev, const unsigned char *cmd,
+ int data_direction, void *buffer, unsigned bufflen,
+ unsigned char *sense, int timeout, int retries,
+ int flag);
+
+static inline int
+scsi_execute_req(struct scsi_device *sdev, const unsigned char *cmd,
+ int data_direction, void *buffer, unsigned bufflen,
+ unsigned char *sense, int timeout, int retries)
+{
+ return scsi_execute(sdev, cmd, data_direction, buffer, bufflen, sense,
+ timeout, retries, 0);
+}
static inline int scsi_device_online(struct scsi_device *sdev)
{
return sdev->sdev_state != SDEV_OFFLINE;
--- a/include/scsi/scsi_eh.h
+++ b/include/scsi/scsi_eh.h
@@ -26,6 +26,14 @@ struct scsi_sense_hdr { /* See SPC-3 se
u8 additional_length; /* always 0 for fixed sense format */
};
+static inline int scsi_sense_valid(struct scsi_sense_hdr *sshdr)
+{
+ if (!sshdr)
+ return 0;
+
+ return (sshdr->response_code & 0x70) == 0x70;
+}
+
extern void scsi_add_timer(struct scsi_cmnd *, int,
void (*)(struct scsi_cmnd *));
--- a/include/scsi/scsi_request.h
+++ b/include/scsi/scsi_request.h
@@ -54,8 +54,4 @@ extern void scsi_do_req(struct scsi_requ
void *buffer, unsigned bufflen,
void (*done) (struct scsi_cmnd *),
int timeout, int retries);
-extern int scsi_execute_req(struct scsi_device *sdev, unsigned char *cmd,
- int data_direction, void *buffer, unsigned bufflen,
- unsigned char *sense, int timeout, int retries);
-
#endif /* _SCSI_SCSI_REQUEST_H */
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