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 */
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 */
/* 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;
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);
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
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.
*/
.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
};
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)
{
{
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);
.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
};
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);
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. */
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:
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);
return 0;
-out_char:
- tapechar_cleanup_device(device);
out_minor:
tape_remove_minor(device);
out_discipline:
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);
{
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,
}
/*
- * 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)
}
/*
- * 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)
DBF_EVENT(3, "tape init\n");
tape_proc_init();
tapechar_init ();
- tapeblock_init ();
return 0;
}
/* Get rid of the frontends */
tapechar_exit();
- tapeblock_exit();
tape_proc_cleanup();
debug_unregister (TAPE_DBF_AREA);
}
projects / ~emulex / infiniband.git / commitdiff