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path: root/drivers/scsi/st.c
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Diffstat (limited to 'drivers/scsi/st.c')
-rw-r--r--drivers/scsi/st.c245
1 files changed, 168 insertions, 77 deletions
diff --git a/drivers/scsi/st.c b/drivers/scsi/st.c
index c959bdc55f4f..7f3f317ee6ca 100644
--- a/drivers/scsi/st.c
+++ b/drivers/scsi/st.c
@@ -451,9 +451,23 @@ static void st_sleep_done(void *data, char *sense, int result, int resid)
complete(SRpnt->waiting);
}
-static struct st_request *st_allocate_request(void)
+static struct st_request *st_allocate_request(struct scsi_tape *stp)
{
- return kzalloc(sizeof(struct st_request), GFP_KERNEL);
+ struct st_request *streq;
+
+ streq = kzalloc(sizeof(*streq), GFP_KERNEL);
+ if (streq)
+ streq->stp = stp;
+ else {
+ DEBC(printk(KERN_ERR "%s: Can't get SCSI request.\n",
+ tape_name(stp)););
+ if (signal_pending(current))
+ stp->buffer->syscall_result = -EINTR;
+ else
+ stp->buffer->syscall_result = -EBUSY;
+ }
+
+ return streq;
}
static void st_release_request(struct st_request *streq)
@@ -481,18 +495,10 @@ st_do_scsi(struct st_request * SRpnt, struct scsi_tape * STp, unsigned char *cmd
return NULL;
}
- if (SRpnt == NULL) {
- SRpnt = st_allocate_request();
- if (SRpnt == NULL) {
- DEBC( printk(KERN_ERR "%s: Can't get SCSI request.\n",
- tape_name(STp)); );
- if (signal_pending(current))
- (STp->buffer)->syscall_result = (-EINTR);
- else
- (STp->buffer)->syscall_result = (-EBUSY);
+ if (!SRpnt) {
+ SRpnt = st_allocate_request(STp);
+ if (!SRpnt)
return NULL;
- }
- SRpnt->stp = STp;
}
/* If async IO, set last_SRpnt. This ptr tells write_behind_check
@@ -527,6 +533,28 @@ st_do_scsi(struct st_request * SRpnt, struct scsi_tape * STp, unsigned char *cmd
return SRpnt;
}
+static int st_scsi_kern_execute(struct st_request *streq,
+ const unsigned char *cmd, int data_direction,
+ void *buffer, unsigned bufflen, int timeout,
+ int retries)
+{
+ struct scsi_tape *stp = streq->stp;
+ int ret, resid;
+
+ stp->buffer->cmdstat.have_sense = 0;
+ memcpy(streq->cmd, cmd, sizeof(streq->cmd));
+
+ ret = scsi_execute(stp->device, cmd, data_direction, buffer, bufflen,
+ streq->sense, timeout, retries, 0, &resid);
+ if (driver_byte(ret) & DRIVER_ERROR)
+ return -EBUSY;
+
+ stp->buffer->cmdstat.midlevel_result = streq->result = ret;
+ stp->buffer->cmdstat.residual = resid;
+ stp->buffer->syscall_result = st_chk_result(stp, streq);
+
+ return 0;
+}
/* Handle the write-behind checking (waits for completion). Returns -ENOSPC if
write has been correct but EOM early warning reached, -EIO if write ended in
@@ -599,6 +627,7 @@ static int cross_eof(struct scsi_tape * STp, int forward)
{
struct st_request *SRpnt;
unsigned char cmd[MAX_COMMAND_SIZE];
+ int ret;
cmd[0] = SPACE;
cmd[1] = 0x01; /* Space FileMarks */
@@ -612,19 +641,26 @@ static int cross_eof(struct scsi_tape * STp, int forward)
DEBC(printk(ST_DEB_MSG "%s: Stepping over filemark %s.\n",
tape_name(STp), forward ? "forward" : "backward"));
- SRpnt = st_do_scsi(NULL, STp, cmd, 0, DMA_NONE,
- STp->device->timeout, MAX_RETRIES, 1);
+ SRpnt = st_allocate_request(STp);
if (!SRpnt)
- return (STp->buffer)->syscall_result;
+ return STp->buffer->syscall_result;
- st_release_request(SRpnt);
- SRpnt = NULL;
+ ret = st_scsi_kern_execute(SRpnt, cmd, DMA_NONE, NULL, 0,
+ STp->device->request_queue->rq_timeout,
+ MAX_RETRIES);
+ if (ret)
+ goto out;
+
+ ret = STp->buffer->syscall_result;
if ((STp->buffer)->cmdstat.midlevel_result != 0)
printk(KERN_ERR "%s: Stepping over filemark %s failed.\n",
tape_name(STp), forward ? "forward" : "backward");
- return (STp->buffer)->syscall_result;
+out:
+ st_release_request(SRpnt);
+
+ return ret;
}
@@ -657,7 +693,8 @@ static int st_flush_write_buffer(struct scsi_tape * STp)
cmd[4] = blks;
SRpnt = st_do_scsi(NULL, STp, cmd, transfer, DMA_TO_DEVICE,
- STp->device->timeout, MAX_WRITE_RETRIES, 1);
+ STp->device->request_queue->rq_timeout,
+ MAX_WRITE_RETRIES, 1);
if (!SRpnt)
return (STp->buffer)->syscall_result;
@@ -844,21 +881,24 @@ static int test_ready(struct scsi_tape *STp, int do_wait)
int attentions, waits, max_wait, scode;
int retval = CHKRES_READY, new_session = 0;
unsigned char cmd[MAX_COMMAND_SIZE];
- struct st_request *SRpnt = NULL;
+ struct st_request *SRpnt;
struct st_cmdstatus *cmdstatp = &STp->buffer->cmdstat;
+ SRpnt = st_allocate_request(STp);
+ if (!SRpnt)
+ return STp->buffer->syscall_result;
+
max_wait = do_wait ? ST_BLOCK_SECONDS : 0;
for (attentions=waits=0; ; ) {
memset((void *) &cmd[0], 0, MAX_COMMAND_SIZE);
cmd[0] = TEST_UNIT_READY;
- SRpnt = st_do_scsi(SRpnt, STp, cmd, 0, DMA_NONE,
- STp->long_timeout, MAX_READY_RETRIES, 1);
- if (!SRpnt) {
- retval = (STp->buffer)->syscall_result;
+ retval = st_scsi_kern_execute(SRpnt, cmd, DMA_NONE, NULL, 0,
+ STp->long_timeout,
+ MAX_READY_RETRIES);
+ if (retval)
break;
- }
if (cmdstatp->have_sense) {
@@ -902,8 +942,8 @@ static int test_ready(struct scsi_tape *STp, int do_wait)
break;
}
- if (SRpnt != NULL)
- st_release_request(SRpnt);
+ st_release_request(SRpnt);
+
return retval;
}
@@ -980,16 +1020,24 @@ static int check_tape(struct scsi_tape *STp, struct file *filp)
}
}
+ SRpnt = st_allocate_request(STp);
+ if (!SRpnt) {
+ retval = STp->buffer->syscall_result;
+ goto err_out;
+ }
+
if (STp->omit_blklims)
STp->min_block = STp->max_block = (-1);
else {
memset((void *) &cmd[0], 0, MAX_COMMAND_SIZE);
cmd[0] = READ_BLOCK_LIMITS;
- SRpnt = st_do_scsi(SRpnt, STp, cmd, 6, DMA_FROM_DEVICE,
- STp->device->timeout, MAX_READY_RETRIES, 1);
- if (!SRpnt) {
- retval = (STp->buffer)->syscall_result;
+ retval = st_scsi_kern_execute(SRpnt, cmd, DMA_FROM_DEVICE,
+ STp->buffer->b_data, 6,
+ STp->device->request_queue->rq_timeout,
+ MAX_READY_RETRIES);
+ if (retval) {
+ st_release_request(SRpnt);
goto err_out;
}
@@ -1013,10 +1061,12 @@ static int check_tape(struct scsi_tape *STp, struct file *filp)
cmd[0] = MODE_SENSE;
cmd[4] = 12;
- SRpnt = st_do_scsi(SRpnt, STp, cmd, 12, DMA_FROM_DEVICE,
- STp->device->timeout, MAX_READY_RETRIES, 1);
- if (!SRpnt) {
- retval = (STp->buffer)->syscall_result;
+ retval = st_scsi_kern_execute(SRpnt, cmd, DMA_FROM_DEVICE,
+ STp->buffer->b_data, 12,
+ STp->device->request_queue->rq_timeout,
+ MAX_READY_RETRIES);
+ if (retval) {
+ st_release_request(SRpnt);
goto err_out;
}
@@ -1246,10 +1296,17 @@ static int st_flush(struct file *filp, fl_owner_t id)
cmd[0] = WRITE_FILEMARKS;
cmd[4] = 1 + STp->two_fm;
- SRpnt = st_do_scsi(NULL, STp, cmd, 0, DMA_NONE,
- STp->device->timeout, MAX_WRITE_RETRIES, 1);
+ SRpnt = st_allocate_request(STp);
if (!SRpnt) {
- result = (STp->buffer)->syscall_result;
+ result = STp->buffer->syscall_result;
+ goto out;
+ }
+
+ result = st_scsi_kern_execute(SRpnt, cmd, DMA_NONE, NULL, 0,
+ STp->device->request_queue->rq_timeout,
+ MAX_WRITE_RETRIES);
+ if (result) {
+ st_release_request(SRpnt);
goto out;
}
@@ -1634,7 +1691,8 @@ st_write(struct file *filp, const char __user *buf, size_t count, loff_t * ppos)
cmd[4] = blks;
SRpnt = st_do_scsi(SRpnt, STp, cmd, transfer, DMA_TO_DEVICE,
- STp->device->timeout, MAX_WRITE_RETRIES, !async_write);
+ STp->device->request_queue->rq_timeout,
+ MAX_WRITE_RETRIES, !async_write);
if (!SRpnt) {
retval = STbp->syscall_result;
goto out;
@@ -1804,7 +1862,8 @@ static long read_tape(struct scsi_tape *STp, long count,
SRpnt = *aSRpnt;
SRpnt = st_do_scsi(SRpnt, STp, cmd, bytes, DMA_FROM_DEVICE,
- STp->device->timeout, MAX_RETRIES, 1);
+ STp->device->request_queue->rq_timeout,
+ MAX_RETRIES, 1);
release_buffering(STp, 1);
*aSRpnt = SRpnt;
if (!SRpnt)
@@ -2213,7 +2272,8 @@ static int st_set_options(struct scsi_tape *STp, long options)
DEBC( printk(KERN_INFO "%s: Long timeout set to %d seconds.\n", name,
(value & ~MT_ST_SET_LONG_TIMEOUT)));
} else {
- STp->device->timeout = value * HZ;
+ blk_queue_rq_timeout(STp->device->request_queue,
+ value * HZ);
DEBC( printk(KERN_INFO "%s: Normal timeout set to %d seconds.\n",
name, value) );
}
@@ -2311,7 +2371,8 @@ static int st_set_options(struct scsi_tape *STp, long options)
static int read_mode_page(struct scsi_tape *STp, int page, int omit_block_descs)
{
unsigned char cmd[MAX_COMMAND_SIZE];
- struct st_request *SRpnt = NULL;
+ struct st_request *SRpnt;
+ int ret;
memset(cmd, 0, MAX_COMMAND_SIZE);
cmd[0] = MODE_SENSE;
@@ -2320,14 +2381,17 @@ static int read_mode_page(struct scsi_tape *STp, int page, int omit_block_descs)
cmd[2] = page;
cmd[4] = 255;
- SRpnt = st_do_scsi(SRpnt, STp, cmd, cmd[4], DMA_FROM_DEVICE,
- STp->device->timeout, 0, 1);
- if (SRpnt == NULL)
- return (STp->buffer)->syscall_result;
+ SRpnt = st_allocate_request(STp);
+ if (!SRpnt)
+ return STp->buffer->syscall_result;
+ ret = st_scsi_kern_execute(SRpnt, cmd, DMA_FROM_DEVICE,
+ STp->buffer->b_data, cmd[4],
+ STp->device->request_queue->rq_timeout,
+ MAX_RETRIES);
st_release_request(SRpnt);
- return (STp->buffer)->syscall_result;
+ return ret ? : STp->buffer->syscall_result;
}
@@ -2335,9 +2399,9 @@ static int read_mode_page(struct scsi_tape *STp, int page, int omit_block_descs)
in the buffer is correctly formatted. The long timeout is used if slow is non-zero. */
static int write_mode_page(struct scsi_tape *STp, int page, int slow)
{
- int pgo;
+ int pgo, timeout, ret = 0;
unsigned char cmd[MAX_COMMAND_SIZE];
- struct st_request *SRpnt = NULL;
+ struct st_request *SRpnt;
memset(cmd, 0, MAX_COMMAND_SIZE);
cmd[0] = MODE_SELECT;
@@ -2351,14 +2415,21 @@ static int write_mode_page(struct scsi_tape *STp, int page, int slow)
(STp->buffer)->b_data[MH_OFF_DEV_SPECIFIC] &= ~MH_BIT_WP;
(STp->buffer)->b_data[pgo + MP_OFF_PAGE_NBR] &= MP_MSK_PAGE_NBR;
- SRpnt = st_do_scsi(SRpnt, STp, cmd, cmd[4], DMA_TO_DEVICE,
- (slow ? STp->long_timeout : STp->device->timeout), 0, 1);
- if (SRpnt == NULL)
- return (STp->buffer)->syscall_result;
+ SRpnt = st_allocate_request(STp);
+ if (!SRpnt)
+ return ret;
+
+ timeout = slow ? STp->long_timeout :
+ STp->device->request_queue->rq_timeout;
+
+ ret = st_scsi_kern_execute(SRpnt, cmd, DMA_TO_DEVICE,
+ STp->buffer->b_data, cmd[4], timeout, 0);
+ if (!ret)
+ ret = STp->buffer->syscall_result;
st_release_request(SRpnt);
- return (STp->buffer)->syscall_result;
+ return ret;
}
@@ -2464,7 +2535,7 @@ static int do_load_unload(struct scsi_tape *STp, struct file *filp, int load_cod
}
if (STp->immediate) {
cmd[1] = 1; /* Don't wait for completion */
- timeout = STp->device->timeout;
+ timeout = STp->device->request_queue->rq_timeout;
}
else
timeout = STp->long_timeout;
@@ -2476,13 +2547,16 @@ static int do_load_unload(struct scsi_tape *STp, struct file *filp, int load_cod
printk(ST_DEB_MSG "%s: Loading tape.\n", name);
);
- SRpnt = st_do_scsi(NULL, STp, cmd, 0, DMA_NONE,
- timeout, MAX_RETRIES, 1);
+ SRpnt = st_allocate_request(STp);
if (!SRpnt)
- return (STp->buffer)->syscall_result;
+ return STp->buffer->syscall_result;
+
+ retval = st_scsi_kern_execute(SRpnt, cmd, DMA_NONE, NULL, 0, timeout,
+ MAX_RETRIES);
+ if (retval)
+ goto out;
retval = (STp->buffer)->syscall_result;
- st_release_request(SRpnt);
if (!retval) { /* SCSI command successful */
@@ -2501,6 +2575,8 @@ static int do_load_unload(struct scsi_tape *STp, struct file *filp, int load_cod
STps = &(STp->ps[STp->partition]);
STps->drv_file = STps->drv_block = (-1);
}
+out:
+ st_release_request(SRpnt);
return retval;
}
@@ -2638,7 +2714,7 @@ static int st_int_ioctl(struct scsi_tape *STp, unsigned int cmd_in, unsigned lon
cmd[2] = (arg >> 16);
cmd[3] = (arg >> 8);
cmd[4] = arg;
- timeout = STp->device->timeout;
+ timeout = STp->device->request_queue->rq_timeout;
DEBC(
if (cmd_in == MTWEOF)
printk(ST_DEB_MSG "%s: Writing %d filemarks.\n", name,
@@ -2656,7 +2732,7 @@ static int st_int_ioctl(struct scsi_tape *STp, unsigned int cmd_in, unsigned lon
cmd[0] = REZERO_UNIT;
if (STp->immediate) {
cmd[1] = 1; /* Don't wait for completion */
- timeout = STp->device->timeout;
+ timeout = STp->device->request_queue->rq_timeout;
}
DEBC(printk(ST_DEB_MSG "%s: Rewinding tape.\n", name));
fileno = blkno = at_sm = 0;
@@ -2669,7 +2745,7 @@ static int st_int_ioctl(struct scsi_tape *STp, unsigned int cmd_in, unsigned lon
cmd[0] = START_STOP;
if (STp->immediate) {
cmd[1] = 1; /* Don't wait for completion */
- timeout = STp->device->timeout;
+ timeout = STp->device->request_queue->rq_timeout;
}
cmd[4] = 3;
DEBC(printk(ST_DEB_MSG "%s: Retensioning tape.\n", name));
@@ -2702,7 +2778,7 @@ static int st_int_ioctl(struct scsi_tape *STp, unsigned int cmd_in, unsigned lon
cmd[1] = (arg ? 1 : 0); /* Long erase with non-zero argument */
if (STp->immediate) {
cmd[1] |= 2; /* Don't wait for completion */
- timeout = STp->device->timeout;
+ timeout = STp->device->request_queue->rq_timeout;
}
else
timeout = STp->long_timeout * 8;
@@ -2754,7 +2830,7 @@ static int st_int_ioctl(struct scsi_tape *STp, unsigned int cmd_in, unsigned lon
(STp->buffer)->b_data[9] = (ltmp >> 16);
(STp->buffer)->b_data[10] = (ltmp >> 8);
(STp->buffer)->b_data[11] = ltmp;
- timeout = STp->device->timeout;
+ timeout = STp->device->request_queue->rq_timeout;
DEBC(
if (cmd_in == MTSETBLK || cmd_in == SET_DENS_AND_BLK)
printk(ST_DEB_MSG
@@ -2776,12 +2852,15 @@ static int st_int_ioctl(struct scsi_tape *STp, unsigned int cmd_in, unsigned lon
return (-ENOSYS);
}
- SRpnt = st_do_scsi(NULL, STp, cmd, datalen, direction,
- timeout, MAX_RETRIES, 1);
+ SRpnt = st_allocate_request(STp);
if (!SRpnt)
return (STp->buffer)->syscall_result;
- ioctl_result = (STp->buffer)->syscall_result;
+ ioctl_result = st_scsi_kern_execute(SRpnt, cmd, direction,
+ STp->buffer->b_data, datalen,
+ timeout, MAX_RETRIES);
+ if (!ioctl_result)
+ ioctl_result = (STp->buffer)->syscall_result;
if (!ioctl_result) { /* SCSI command successful */
st_release_request(SRpnt);
@@ -2943,10 +3022,17 @@ static int get_location(struct scsi_tape *STp, unsigned int *block, int *partiti
if (!logical && !STp->scsi2_logical)
scmd[1] = 1;
}
- SRpnt = st_do_scsi(NULL, STp, scmd, 20, DMA_FROM_DEVICE,
- STp->device->timeout, MAX_READY_RETRIES, 1);
+
+ SRpnt = st_allocate_request(STp);
if (!SRpnt)
- return (STp->buffer)->syscall_result;
+ return STp->buffer->syscall_result;
+
+ result = st_scsi_kern_execute(SRpnt, scmd, DMA_FROM_DEVICE,
+ STp->buffer->b_data, 20,
+ STp->device->request_queue->rq_timeout,
+ MAX_READY_RETRIES);
+ if (result)
+ goto out;
if ((STp->buffer)->syscall_result != 0 ||
(STp->device->scsi_level >= SCSI_2 &&
@@ -2974,6 +3060,7 @@ static int get_location(struct scsi_tape *STp, unsigned int *block, int *partiti
DEBC(printk(ST_DEB_MSG "%s: Got tape pos. blk %d part %d.\n", name,
*block, *partition));
}
+out:
st_release_request(SRpnt);
SRpnt = NULL;
@@ -3045,13 +3132,17 @@ static int set_location(struct scsi_tape *STp, unsigned int block, int partition
}
if (STp->immediate) {
scmd[1] |= 1; /* Don't wait for completion */
- timeout = STp->device->timeout;
+ timeout = STp->device->request_queue->rq_timeout;
}
- SRpnt = st_do_scsi(NULL, STp, scmd, 0, DMA_NONE,
- timeout, MAX_READY_RETRIES, 1);
+ SRpnt = st_allocate_request(STp);
if (!SRpnt)
- return (STp->buffer)->syscall_result;
+ return STp->buffer->syscall_result;
+
+ result = st_scsi_kern_execute(SRpnt, scmd, DMA_NONE, NULL, 0,
+ timeout, MAX_READY_RETRIES);
+ if (result)
+ goto out;
STps->drv_block = STps->drv_file = (-1);
STps->eof = ST_NOEOF;
@@ -3076,7 +3167,7 @@ static int set_location(struct scsi_tape *STp, unsigned int block, int partition
STps->drv_block = STps->drv_file = 0;
result = 0;
}
-
+out:
st_release_request(SRpnt);
SRpnt = NULL;
@@ -4029,7 +4120,7 @@ static int st_probe(struct device *dev)
tpnt->partition = 0;
tpnt->new_partition = 0;
tpnt->nbr_partitions = 0;
- tpnt->device->timeout = ST_TIMEOUT;
+ blk_queue_rq_timeout(tpnt->device->request_queue, ST_TIMEOUT);
tpnt->long_timeout = ST_LONG_TIMEOUT;
tpnt->try_dio = try_direct_io && !SDp->host->unchecked_isa_dma;
generated by cgit v1.2.3 (git 2.0.4) at 2024-11-08 21:06:34 +0000