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s390/tape: remove tape block leftovers

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Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Heiko Carstens 2012-05-09 16:27:37 +02:00 committed by Martin Schwidefsky
parent b2a68c2356
commit 161beff8f4
5 changed files with 2 additions and 311 deletions
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43
drivers/s390/char/tape.h
View File

@ -154,12 +154,6 @@ struct tape_discipline {
struct tape_request *(*read_block)(struct tape_device *, size_t);
struct tape_request *(*write_block)(struct tape_device *, size_t);
void (*process_eov)(struct tape_device*);
#ifdef CONFIG_S390_TAPE_BLOCK
/* Block device stuff. */
struct tape_request *(*bread)(struct tape_device *, struct request *);
void (*check_locate)(struct tape_device *, struct tape_request *);
void (*free_bread)(struct tape_request *);
#endif
/* ioctl function for additional ioctls. */
int (*ioctl_fn)(struct tape_device *, unsigned int, unsigned long);
/* Array of tape commands with TAPE_NR_MTOPS entries */
@ -182,26 +176,6 @@ struct tape_char_data {
int block_size; /* of size block_size. */
};
#ifdef CONFIG_S390_TAPE_BLOCK
/* Block Frontend Data */
struct tape_blk_data
{
struct tape_device * device;
/* Block device request queue. */
struct request_queue * request_queue;
spinlock_t request_queue_lock;
/* Task to move entries from block request to CCS request queue. */
struct work_struct requeue_task;
atomic_t requeue_scheduled;
/* Current position on the tape. */
long block_position;
int medium_changed;
struct gendisk * disk;
};
#endif
/* Tape Info */
struct tape_device {
/* entry in tape_device_list */
@ -248,10 +222,6 @@ struct tape_device {
/* Character device frontend data */
struct tape_char_data char_data;
#ifdef CONFIG_S390_TAPE_BLOCK
/* Block dev frontend data */
struct tape_blk_data blk_data;
#endif
/* Function to start or stop the next request later. */
struct delayed_work tape_dnr;
@ -313,19 +283,6 @@ extern void tapechar_exit(void);
extern int tapechar_setup_device(struct tape_device *);
extern void tapechar_cleanup_device(struct tape_device *);
/* Externals from tape_block.c */
#ifdef CONFIG_S390_TAPE_BLOCK
extern int tapeblock_init (void);
extern void tapeblock_exit(void);
extern int tapeblock_setup_device(struct tape_device *);
extern void tapeblock_cleanup_device(struct tape_device *);
#else
static inline int tapeblock_init (void) {return 0;}
static inline void tapeblock_exit (void) {;}
static inline int tapeblock_setup_device(struct tape_device *t) {return 0;}
static inline void tapeblock_cleanup_device (struct tape_device *t) {;}
#endif
/* tape initialisation functions */
#ifdef CONFIG_PROC_FS
extern void tape_proc_init (void);

136
drivers/s390/char/tape_34xx.c
View File

@ -323,20 +323,6 @@ tape_34xx_unit_check(struct tape_device *device, struct tape_request *request,
inhibit_cu_recovery = (*device->modeset_byte & 0x80) ? 1 : 0;
sense = irb->ecw;
#ifdef CONFIG_S390_TAPE_BLOCK
if (request->op == TO_BLOCK) {
/*
* Recovery for block device requests. Set the block_position
* to something invalid and retry.
*/
device->blk_data.block_position = -1;
if (request->retries-- <= 0)
return tape_34xx_erp_failed(request, -EIO);
else
return tape_34xx_erp_retry(request);
}
#endif
if (
sense[0] & SENSE_COMMAND_REJECT &&
sense[1] & SENSE_WRITE_PROTECT
@ -1129,123 +1115,6 @@ tape_34xx_mtseek(struct tape_device *device, int mt_count)
return tape_do_io_free(device, request);
}
#ifdef CONFIG_S390_TAPE_BLOCK
/*
* Tape block read for 34xx.
*/
static struct tape_request *
tape_34xx_bread(struct tape_device *device, struct request *req)
{
struct tape_request *request;
struct ccw1 *ccw;
int count = 0;
unsigned off;
char *dst;
struct bio_vec *bv;
struct req_iterator iter;
struct tape_34xx_block_id * start_block;
DBF_EVENT(6, "xBREDid:");
/* Count the number of blocks for the request. */
rq_for_each_segment(bv, req, iter)
count += bv->bv_len >> (TAPEBLOCK_HSEC_S2B + 9);
/* Allocate the ccw request. */
request = tape_alloc_request(3+count+1, 8);
if (IS_ERR(request))
return request;
/* Setup ccws. */
request->op = TO_BLOCK;
start_block = (struct tape_34xx_block_id *) request->cpdata;
start_block->block = blk_rq_pos(req) >> TAPEBLOCK_HSEC_S2B;
DBF_EVENT(6, "start_block = %i\n", start_block->block);
ccw = request->cpaddr;
ccw = tape_ccw_cc(ccw, MODE_SET_DB, 1, device->modeset_byte);
/*
* We always setup a nop after the mode set ccw. This slot is
* used in tape_std_check_locate to insert a locate ccw if the
* current tape position doesn't match the start block to be read.
* The second nop will be filled with a read block id which is in
* turn used by tape_34xx_free_bread to populate the segment bid
* table.
*/
ccw = tape_ccw_cc(ccw, NOP, 0, NULL);
ccw = tape_ccw_cc(ccw, NOP, 0, NULL);
rq_for_each_segment(bv, req, iter) {
dst = kmap(bv->bv_page) + bv->bv_offset;
for (off = 0; off < bv->bv_len; off += TAPEBLOCK_HSEC_SIZE) {
ccw->flags = CCW_FLAG_CC;
ccw->cmd_code = READ_FORWARD;
ccw->count = TAPEBLOCK_HSEC_SIZE;
set_normalized_cda(ccw, (void*) __pa(dst));
ccw++;
dst += TAPEBLOCK_HSEC_SIZE;
}
}
ccw = tape_ccw_end(ccw, NOP, 0, NULL);
DBF_EVENT(6, "xBREDccwg\n");
return request;
}
static void
tape_34xx_free_bread (struct tape_request *request)
{
struct ccw1* ccw;
ccw = request->cpaddr;
if ((ccw + 2)->cmd_code == READ_BLOCK_ID) {
struct {
struct tape_34xx_block_id cbid;
struct tape_34xx_block_id dbid;
} __attribute__ ((packed)) *rbi_data;
rbi_data = request->cpdata;
if (request->device)
tape_34xx_add_sbid(request->device, rbi_data->cbid);
}
/* Last ccw is a nop and doesn't need clear_normalized_cda */
for (; ccw->flags & CCW_FLAG_CC; ccw++)
if (ccw->cmd_code == READ_FORWARD)
clear_normalized_cda(ccw);
tape_free_request(request);
}
/*
* check_locate is called just before the tape request is passed to
* the common io layer for execution. It has to check the current
* tape position and insert a locate ccw if it doesn't match the
* start block for the request.
*/
static void
tape_34xx_check_locate(struct tape_device *device, struct tape_request *request)
{
struct tape_34xx_block_id * start_block;
start_block = (struct tape_34xx_block_id *) request->cpdata;
if (start_block->block == device->blk_data.block_position)
return;
DBF_LH(4, "Block seek(%06d+%06d)\n", start_block->block, device->bof);
start_block->wrap = 0;
start_block->segment = 1;
start_block->format = (*device->modeset_byte & 0x08) ?
TAPE34XX_FMT_3480_XF :
TAPE34XX_FMT_3480;
start_block->block = start_block->block + device->bof;
tape_34xx_merge_sbid(device, start_block);
tape_ccw_cc(request->cpaddr + 1, LOCATE, 4, request->cpdata);
tape_ccw_cc(request->cpaddr + 2, READ_BLOCK_ID, 8, request->cpdata);
}
#endif
/*
* List of 3480/3490 magnetic tape commands.
*/
@ -1295,11 +1164,6 @@ static struct tape_discipline tape_discipline_34xx = {
.irq = tape_34xx_irq,
.read_block = tape_std_read_block,
.write_block = tape_std_write_block,
#ifdef CONFIG_S390_TAPE_BLOCK
.bread = tape_34xx_bread,
.free_bread = tape_34xx_free_bread,
.check_locate = tape_34xx_check_locate,
#endif
.ioctl_fn = tape_34xx_ioctl,
.mtop_array = tape_34xx_mtop
};

105
drivers/s390/char/tape_3590.c
View File

@ -670,92 +670,6 @@ tape_3590_schedule_work(struct tape_device *device, enum tape_op op)
return 0;
}
#ifdef CONFIG_S390_TAPE_BLOCK
/*
* Tape Block READ
*/
static struct tape_request *
tape_3590_bread(struct tape_device *device, struct request *req)
{
struct tape_request *request;
struct ccw1 *ccw;
int count = 0, start_block;
unsigned off;
char *dst;
struct bio_vec *bv;
struct req_iterator iter;
DBF_EVENT(6, "xBREDid:");
start_block = blk_rq_pos(req) >> TAPEBLOCK_HSEC_S2B;
DBF_EVENT(6, "start_block = %i\n", start_block);
rq_for_each_segment(bv, req, iter)
count += bv->bv_len >> (TAPEBLOCK_HSEC_S2B + 9);
request = tape_alloc_request(2 + count + 1, 4);
if (IS_ERR(request))
return request;
request->op = TO_BLOCK;
*(__u32 *) request->cpdata = start_block;
ccw = request->cpaddr;
ccw = tape_ccw_cc(ccw, MODE_SET_DB, 1, device->modeset_byte);
/*
* We always setup a nop after the mode set ccw. This slot is
* used in tape_std_check_locate to insert a locate ccw if the
* current tape position doesn't match the start block to be read.
*/
ccw = tape_ccw_cc(ccw, NOP, 0, NULL);
rq_for_each_segment(bv, req, iter) {
dst = page_address(bv->bv_page) + bv->bv_offset;
for (off = 0; off < bv->bv_len; off += TAPEBLOCK_HSEC_SIZE) {
ccw->flags = CCW_FLAG_CC;
ccw->cmd_code = READ_FORWARD;
ccw->count = TAPEBLOCK_HSEC_SIZE;
set_normalized_cda(ccw, (void *) __pa(dst));
ccw++;
dst += TAPEBLOCK_HSEC_SIZE;
}
BUG_ON(off > bv->bv_len);
}
ccw = tape_ccw_end(ccw, NOP, 0, NULL);
DBF_EVENT(6, "xBREDccwg\n");
return request;
}
static void
tape_3590_free_bread(struct tape_request *request)
{
struct ccw1 *ccw;
/* Last ccw is a nop and doesn't need clear_normalized_cda */
for (ccw = request->cpaddr; ccw->flags & CCW_FLAG_CC; ccw++)
if (ccw->cmd_code == READ_FORWARD)
clear_normalized_cda(ccw);
tape_free_request(request);
}
/*
* check_locate is called just before the tape request is passed to
* the common io layer for execution. It has to check the current
* tape position and insert a locate ccw if it doesn't match the
* start block for the request.
*/
static void
tape_3590_check_locate(struct tape_device *device, struct tape_request *request)
{
__u32 *start_block;
start_block = (__u32 *) request->cpdata;
if (*start_block != device->blk_data.block_position) {
/* Add the start offset of the file to get the real block. */
*start_block += device->bof;
tape_ccw_cc(request->cpaddr + 1, LOCATE, 4, request->cpdata);
}
}
#endif
static void tape_3590_med_state_set(struct tape_device *device,
struct tape_3590_med_sense *sense)
{
@ -1423,20 +1337,6 @@ tape_3590_unit_check(struct tape_device *device, struct tape_request *request,
{
struct tape_3590_sense *sense;
#ifdef CONFIG_S390_TAPE_BLOCK
if (request->op == TO_BLOCK) {
/*
* Recovery for block device requests. Set the block_position
* to something invalid and retry.
*/
device->blk_data.block_position = -1;
if (request->retries-- <= 0)
return tape_3590_erp_failed(device, request, irb, -EIO);
else
return tape_3590_erp_retry(device, request, irb);
}
#endif
sense = (struct tape_3590_sense *) irb->ecw;
DBF_EVENT(6, "Unit Check: RQC = %x\n", sense->rc_rqc);
@ -1729,11 +1629,6 @@ static struct tape_discipline tape_discipline_3590 = {
.irq = tape_3590_irq,
.read_block = tape_std_read_block,
.write_block = tape_std_write_block,
#ifdef CONFIG_S390_TAPE_BLOCK
.bread = tape_3590_bread,
.free_bread = tape_3590_free_bread,
.check_locate = tape_3590_check_locate,
#endif
.ioctl_fn = tape_3590_ioctl,
.mtop_array = tape_3590_mtop
};

13
drivers/s390/char/tape_char.c
View File

@ -161,11 +161,6 @@ tapechar_read(struct file *filp, char __user *data, size_t count, loff_t *ppos)
if (rc)
return rc;
#ifdef CONFIG_S390_TAPE_BLOCK
/* Changes position. */
device->blk_data.medium_changed = 1;
#endif
DBF_EVENT(6, "TCHAR:nbytes: %lx\n", block_size);
/* Let the discipline build the ccw chain. */
request = device->discipline->read_block(device, block_size);
@ -218,11 +213,6 @@ tapechar_write(struct file *filp, const char __user *data, size_t count, loff_t
if (rc)
return rc;
#ifdef CONFIG_S390_TAPE_BLOCK
/* Changes position. */
device->blk_data.medium_changed = 1;
#endif
DBF_EVENT(6,"TCHAR:nbytes: %lx\n", block_size);
DBF_EVENT(6, "TCHAR:nblocks: %x\n", nblocks);
/* Let the discipline build the ccw chain. */
@ -379,9 +369,6 @@ __tapechar_ioctl(struct tape_device *device,
case MTBSFM:
case MTFSFM:
case MTSEEK:
#ifdef CONFIG_S390_TAPE_BLOCK
device->blk_data.medium_changed = 1;
#endif
if (device->required_tapemarks)
tape_std_terminate_write(device);
default:

16
drivers/s390/char/tape_core.c
View File

@ -401,9 +401,6 @@ tape_generic_online(struct tape_device *device,
rc = tapechar_setup_device(device);
if (rc)
goto out_minor;
rc = tapeblock_setup_device(device);
if (rc)
goto out_char;
tape_state_set(device, TS_UNUSED);
@ -411,8 +408,6 @@ tape_generic_online(struct tape_device *device,
return 0;
out_char:
tapechar_cleanup_device(device);
out_minor:
tape_remove_minor(device);
out_discipline:
@ -426,7 +421,6 @@ out:
static void
tape_cleanup_device(struct tape_device *device)
{
tapeblock_cleanup_device(device);
tapechar_cleanup_device(device);
device->discipline->cleanup_device(device);
module_put(device->discipline->owner);
@ -785,10 +779,6 @@ __tape_start_io(struct tape_device *device, struct tape_request *request)
{
int rc;
#ifdef CONFIG_S390_TAPE_BLOCK
if (request->op == TO_BLOCK)
device->discipline->check_locate(device, request);
#endif
rc = ccw_device_start(
device->cdev,
request->cpaddr,
@ -1253,7 +1243,7 @@ __tape_do_irq (struct ccw_device *cdev, unsigned long intparm, struct irb *irb)
}
/*
* Tape device open function used by tape_char & tape_block frontends.
* Tape device open function used by tape_char frontend.
*/
int
tape_open(struct tape_device *device)
@ -1283,7 +1273,7 @@ tape_open(struct tape_device *device)
}
/*
* Tape device release function used by tape_char & tape_block frontends.
* Tape device release function used by tape_char frontend.
*/
int
tape_release(struct tape_device *device)
@ -1344,7 +1334,6 @@ tape_init (void)
DBF_EVENT(3, "tape init\n");
tape_proc_init();
tapechar_init ();
tapeblock_init ();
return 0;
}
@ -1358,7 +1347,6 @@ tape_exit(void)
/* Get rid of the frontends */
tapechar_exit();
tapeblock_exit();
tape_proc_cleanup();
debug_unregister (TAPE_DBF_AREA);
}