mirror of https://gitee.com/openkylin/linux.git
[SCSI] convert SPI transport class to scsi_execute
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. Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
This commit is contained in:
James Bottomley
parent
1cf72699c1
commit
33aa687db9
|
|
@ -1847,12 +1847,16 @@ 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
|
||||
|
|
|
|||
|
|
@ -282,7 +282,7 @@ void scsi_wait_req(struct scsi_request *sreq, const void *cmnd, void *buffer,
|
|||
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
|
||||
|
|
@ -291,13 +291,14 @@ 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 scsi_execute(struct scsi_device *sdev, const unsigned char *cmd,
|
||||
int data_direction, void *buffer, unsigned bufflen,
|
||||
unsigned char *sense, int timeout, int retries)
|
||||
unsigned char *sense, int timeout, int retries, int flags)
|
||||
{
|
||||
struct request *req;
|
||||
int write = (data_direction == DMA_TO_DEVICE);
|
||||
|
|
@ -314,7 +315,7 @@ int scsi_execute_req(struct scsi_device *sdev, unsigned char *cmd,
|
|||
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
|
||||
|
|
@ -328,7 +329,7 @@ int scsi_execute_req(struct scsi_device *sdev, unsigned char *cmd,
|
|||
return ret;
|
||||
}
|
||||
|
||||
EXPORT_SYMBOL(scsi_execute_req);
|
||||
EXPORT_SYMBOL(scsi_execute);
|
||||
|
||||
/*
|
||||
* Function: scsi_init_cmd_errh()
|
||||
|
|
|
|||
|
|
@ -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 value, int denom)
|
|||
|
||||
/* 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;
|
||||
/* 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_request_normalize_sense(sreq, &sshdr)
|
||||
&& sshdr.sense_key == UNIT_ATTENTION)
|
||||
if (scsi_normalize_sense(sense, sizeof(*sense),
|
||||
sshdr)
|
||||
&& sshdr->sense_key == UNIT_ATTENTION)
|
||||
continue;
|
||||
}
|
||||
break;
|
||||
}
|
||||
return result;
|
||||
}
|
||||
|
||||
static struct {
|
||||
|
|
@ -546,13 +554,13 @@ 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
|
||||
|
|
@ -597,14 +605,12 @@ spi_dv_device_echo_buffer(struct scsi_request *sreq, u8 *buffer,
|
|||
}
|
||||
|
||||
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)
|
||||
|
|
@ -616,14 +622,13 @@ spi_dv_device_echo_buffer(struct scsi_request *sreq, u8 *buffer,
|
|||
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)
|
||||
|
|
@ -635,25 +640,22 @@ spi_dv_device_echo_buffer(struct scsi_request *sreq, u8 *buffer,
|
|||
/* 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;
|
||||
}
|
||||
|
|
@ -674,12 +676,11 @@ spi_dv_device_compare_inquiry(struct scsi_request *sreq, u8 *buffer,
|
|||
}
|
||||
|
||||
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;
|
||||
|
|
@ -687,7 +688,7 @@ spi_dv_retrain(struct scsi_request *sreq, u8 *buffer, u8 *ptr,
|
|||
|
||||
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)
|
||||
|
|
@ -733,9 +734,9 @@ spi_dv_retrain(struct scsi_request *sreq, u8 *buffer, u8 *ptr,
|
|||
}
|
||||
|
||||
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
|
||||
|
|
@ -751,18 +752,16 @@ spi_dv_device_get_echo_buffer(struct scsi_request *sreq, u8 *buffer)
|
|||
};
|
||||
|
||||
|
||||
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 {
|
||||
|
|
@ -771,12 +770,10 @@ spi_dv_device_get_echo_buffer(struct scsi_request *sreq, u8 *buffer)
|
|||
}
|
||||
}
|
||||
|
||||
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;
|
||||
|
||||
|
|
@ -784,17 +781,16 @@ spi_dv_device_get_echo_buffer(struct scsi_request *sreq, u8 *buffer)
|
|||
}
|
||||
|
||||
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? */
|
||||
|
|
@ -806,7 +802,7 @@ spi_dv_device_internal(struct scsi_request *sreq, u8 *buffer)
|
|||
scsi_device_wide(sdev)) {
|
||||
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) {
|
||||
|
|
@ -827,7 +823,7 @@ spi_dv_device_internal(struct scsi_request *sreq, u8 *buffer)
|
|||
|
||||
len = 0;
|
||||
if (scsi_device_dt(sdev))
|
||||
len = spi_dv_device_get_echo_buffer(sreq, buffer);
|
||||
len = spi_dv_device_get_echo_buffer(sdev, buffer);
|
||||
|
||||
retry:
|
||||
|
||||
|
|
@ -853,7 +849,7 @@ spi_dv_device_internal(struct scsi_request *sreq, u8 *buffer)
|
|||
|
||||
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;
|
||||
}
|
||||
|
|
@ -863,7 +859,7 @@ spi_dv_device_internal(struct scsi_request *sreq, u8 *buffer)
|
|||
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
|
||||
|
|
@ -886,16 +882,12 @@ spi_dv_device_internal(struct scsi_request *sreq, u8 *buffer)
|
|||
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);
|
||||
|
||||
|
|
@ -916,7 +908,7 @@ 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");
|
||||
|
||||
|
|
@ -931,8 +923,6 @@ 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);
|
||||
|
||||
|
|
|
|||
|
|
@ -256,6 +256,19 @@ extern void int_to_scsilun(unsigned int, struct scsi_lun *);
|
|||
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;
|
||||
|
|
|
|||
|
|
@ -26,6 +26,14 @@ struct scsi_sense_hdr { /* See SPC-3 section 4.5 */
|
|||
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 *));
|
||||
|
|
|
|||
|
|
@ -54,8 +54,4 @@ extern void scsi_do_req(struct scsi_request *, const void *cmnd,
|
|||
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 */
|
||||
|
|
|
|||
Loading…
Reference in New Issue