Lines Matching refs:STp
242 struct scsi_tape *STp = NULL; in scsi_tape_get() local
247 STp = idr_find(&st_index_idr, dev); in scsi_tape_get()
248 if (!STp) goto out; in scsi_tape_get()
250 kref_get(&STp->kref); in scsi_tape_get()
252 if (!STp->device) in scsi_tape_get()
255 if (scsi_device_get(STp->device)) in scsi_tape_get()
261 kref_put(&STp->kref, scsi_tape_release); in scsi_tape_get()
262 STp = NULL; in scsi_tape_get()
266 return STp; in scsi_tape_get()
269 static void scsi_tape_put(struct scsi_tape *STp) in scsi_tape_put() argument
271 struct scsi_device *sdev = STp->device; in scsi_tape_put()
274 kref_put(&STp->kref, scsi_tape_release); in scsi_tape_put()
357 static int st_chk_result(struct scsi_tape *STp, struct st_request * SRpnt) in st_chk_result() argument
362 char *name = tape_name(STp); in st_chk_result()
368 cmdstatp = &STp->buffer->cmdstat; in st_chk_result()
372 scode = STp->buffer->cmdstat.sense_hdr.sense_key; in st_chk_result()
378 st_printk(ST_DEB_MSG, STp, in st_chk_result()
383 __scsi_print_sense(STp->device, name, in st_chk_result()
388 st_printk(KERN_WARNING, STp, in st_chk_result()
400 __scsi_print_sense(STp->device, name, in st_chk_result()
406 STp->cln_mode >= EXTENDED_SENSE_START) { /* Only fixed format sense */ in st_chk_result()
407 if (STp->cln_sense_value) in st_chk_result()
408 STp->cleaning_req |= ((SRpnt->sense[STp->cln_mode] & in st_chk_result()
409 STp->cln_sense_mask) == STp->cln_sense_value); in st_chk_result()
411 STp->cleaning_req |= ((SRpnt->sense[STp->cln_mode] & in st_chk_result()
412 STp->cln_sense_mask) != 0); in st_chk_result()
416 STp->cleaning_req = 1; /* ASC and ASCQ => cleaning requested */ in st_chk_result()
418 STp->pos_unknown |= STp->device->was_reset; in st_chk_result()
427 STp->recover_count++; in st_chk_result()
428 STp->recover_reg++; in st_chk_result()
438 st_printk(ST_DEB_MSG, STp, in st_chk_result()
440 stp, STp->recover_count); in st_chk_result()
473 static void st_do_stats(struct scsi_tape *STp, struct request *req) in st_do_stats() argument
479 now = ktime_sub(now, STp->stats->write_time); in st_do_stats()
480 atomic64_add(ktime_to_ns(now), &STp->stats->tot_write_time); in st_do_stats()
481 atomic64_add(ktime_to_ns(now), &STp->stats->tot_io_time); in st_do_stats()
482 atomic64_inc(&STp->stats->write_cnt); in st_do_stats()
484 atomic64_add(atomic_read(&STp->stats->last_write_size) in st_do_stats()
485 - STp->buffer->cmdstat.residual, in st_do_stats()
486 &STp->stats->write_byte_cnt); in st_do_stats()
487 if (STp->buffer->cmdstat.residual > 0) in st_do_stats()
488 atomic64_inc(&STp->stats->resid_cnt); in st_do_stats()
490 atomic64_add(atomic_read(&STp->stats->last_write_size), in st_do_stats()
491 &STp->stats->write_byte_cnt); in st_do_stats()
493 now = ktime_sub(now, STp->stats->read_time); in st_do_stats()
494 atomic64_add(ktime_to_ns(now), &STp->stats->tot_read_time); in st_do_stats()
495 atomic64_add(ktime_to_ns(now), &STp->stats->tot_io_time); in st_do_stats()
496 atomic64_inc(&STp->stats->read_cnt); in st_do_stats()
498 atomic64_add(atomic_read(&STp->stats->last_read_size) in st_do_stats()
499 - STp->buffer->cmdstat.residual, in st_do_stats()
500 &STp->stats->read_byte_cnt); in st_do_stats()
501 if (STp->buffer->cmdstat.residual > 0) in st_do_stats()
502 atomic64_inc(&STp->stats->resid_cnt); in st_do_stats()
504 atomic64_add(atomic_read(&STp->stats->last_read_size), in st_do_stats()
505 &STp->stats->read_byte_cnt); in st_do_stats()
507 now = ktime_sub(now, STp->stats->other_time); in st_do_stats()
508 atomic64_add(ktime_to_ns(now), &STp->stats->tot_io_time); in st_do_stats()
509 atomic64_inc(&STp->stats->other_cnt); in st_do_stats()
511 atomic64_dec(&STp->stats->in_flight); in st_do_stats()
517 struct scsi_tape *STp = SRpnt->stp; in st_scsi_execute_end() local
520 STp->buffer->cmdstat.midlevel_result = SRpnt->result = req->errors; in st_scsi_execute_end()
521 STp->buffer->cmdstat.residual = req->resid_len; in st_scsi_execute_end()
523 st_do_stats(STp, req); in st_scsi_execute_end()
541 struct scsi_tape *STp = SRpnt->stp; in st_scsi_execute() local
562 atomic64_inc(&STp->stats->in_flight); in st_scsi_execute()
564 atomic_set(&STp->stats->last_write_size, bufflen); in st_scsi_execute()
565 STp->stats->write_time = ktime_get(); in st_scsi_execute()
567 atomic_set(&STp->stats->last_read_size, bufflen); in st_scsi_execute()
568 STp->stats->read_time = ktime_get(); in st_scsi_execute()
570 STp->stats->other_time = ktime_get(); in st_scsi_execute()
591 st_do_scsi(struct st_request * SRpnt, struct scsi_tape * STp, unsigned char *cmd, in st_do_scsi() argument
595 struct rq_map_data *mdata = &STp->buffer->map_data; in st_do_scsi()
599 if (!do_wait && ((STp->buffer)->last_SRpnt)) { in st_do_scsi()
600 st_printk(KERN_ERR, STp, in st_do_scsi()
603 (STp->buffer)->syscall_result = (-EINTR); in st_do_scsi()
605 (STp->buffer)->syscall_result = (-EBUSY); in st_do_scsi()
610 SRpnt = st_allocate_request(STp); in st_do_scsi()
618 (STp->buffer)->last_SRpnt = SRpnt; in st_do_scsi()
620 waiting = &STp->wait; in st_do_scsi()
624 if (STp->buffer->do_dio) { in st_do_scsi()
626 mdata->nr_entries = STp->buffer->sg_segs; in st_do_scsi()
627 mdata->pages = STp->buffer->mapped_pages; in st_do_scsi()
629 mdata->page_order = STp->buffer->reserved_page_order; in st_do_scsi()
632 mdata->pages = STp->buffer->reserved_pages; in st_do_scsi()
637 STp->buffer->cmdstat.have_sense = 0; in st_do_scsi()
638 STp->buffer->syscall_result = 0; in st_do_scsi()
644 (STp->buffer)->syscall_result = (-EBUSY); in st_do_scsi()
645 (STp->buffer)->last_SRpnt = NULL; in st_do_scsi()
649 (STp->buffer)->syscall_result = st_chk_result(STp, SRpnt); in st_do_scsi()
660 static int write_behind_check(struct scsi_tape * STp) in write_behind_check() argument
668 STbuffer = STp->buffer; in write_behind_check()
673 if (STp->write_pending) in write_behind_check()
674 STp->nbr_waits++; in write_behind_check()
676 STp->nbr_finished++; in write_behind_check()
679 wait_for_completion(&(STp->wait)); in write_behind_check()
684 (STp->buffer)->syscall_result = st_chk_result(STp, SRpnt); in write_behind_check()
688 STps = &(STp->ps[STp->partition]); in write_behind_check()
690 if (STp->block_size == 0) in write_behind_check()
693 STps->drv_block += STbuffer->writing / STp->block_size; in write_behind_check()
714 st_printk(ST_DEB_MSG, STp, in write_behind_check()
724 static int cross_eof(struct scsi_tape * STp, int forward) in cross_eof() argument
738 DEBC_printk(STp, "Stepping over filemark %s.\n", in cross_eof()
741 SRpnt = st_do_scsi(NULL, STp, cmd, 0, DMA_NONE, in cross_eof()
742 STp->device->request_queue->rq_timeout, in cross_eof()
745 return (STp->buffer)->syscall_result; in cross_eof()
750 if ((STp->buffer)->cmdstat.midlevel_result != 0) in cross_eof()
751 st_printk(KERN_ERR, STp, in cross_eof()
755 return (STp->buffer)->syscall_result; in cross_eof()
760 static int st_flush_write_buffer(struct scsi_tape * STp) in st_flush_write_buffer() argument
768 result = write_behind_check(STp); in st_flush_write_buffer()
773 if (STp->dirty == 1) { in st_flush_write_buffer()
775 transfer = STp->buffer->buffer_bytes; in st_flush_write_buffer()
776 DEBC_printk(STp, "Flushing %d bytes.\n", transfer); in st_flush_write_buffer()
781 blks = transfer / STp->block_size; in st_flush_write_buffer()
786 SRpnt = st_do_scsi(NULL, STp, cmd, transfer, DMA_TO_DEVICE, in st_flush_write_buffer()
787 STp->device->request_queue->rq_timeout, in st_flush_write_buffer()
790 return (STp->buffer)->syscall_result; in st_flush_write_buffer()
792 STps = &(STp->ps[STp->partition]); in st_flush_write_buffer()
793 if ((STp->buffer)->syscall_result != 0) { in st_flush_write_buffer()
794 struct st_cmdstatus *cmdstatp = &STp->buffer->cmdstat; in st_flush_write_buffer()
802 STp->dirty = 0; in st_flush_write_buffer()
803 (STp->buffer)->buffer_bytes = 0; in st_flush_write_buffer()
808 st_printk(KERN_ERR, STp, "Error on flush.\n"); in st_flush_write_buffer()
815 STp->dirty = 0; in st_flush_write_buffer()
816 (STp->buffer)->buffer_bytes = 0; in st_flush_write_buffer()
827 static int flush_buffer(struct scsi_tape *STp, int seek_next) in flush_buffer() argument
833 STbuffer = STp->buffer; in flush_buffer()
839 if (STp->pos_unknown) in flush_buffer()
842 if (STp->ready != ST_READY) in flush_buffer()
844 STps = &(STp->ps[STp->partition]); in flush_buffer()
846 return st_flush_write_buffer(STp); in flush_buffer()
848 if (STp->block_size == 0) in flush_buffer()
851 backspace = ((STp->buffer)->buffer_bytes + in flush_buffer()
852 (STp->buffer)->read_pointer) / STp->block_size - in flush_buffer()
853 ((STp->buffer)->read_pointer + STp->block_size - 1) / in flush_buffer()
854 STp->block_size; in flush_buffer()
855 (STp->buffer)->buffer_bytes = 0; in flush_buffer()
856 (STp->buffer)->read_pointer = 0; in flush_buffer()
860 result = cross_eof(STp, 0); /* Back over the EOF hit */ in flush_buffer()
870 result = st_int_ioctl(STp, MTBSR, backspace); in flush_buffer()
882 static int set_mode_densblk(struct scsi_tape * STp, struct st_modedef * STm) in set_mode_densblk() argument
887 if (!STp->density_changed && in set_mode_densblk()
889 STm->default_density != STp->density) { in set_mode_densblk()
893 arg = STp->density; in set_mode_densblk()
895 if (!STp->blksize_changed && in set_mode_densblk()
897 STm->default_blksize != STp->block_size) { in set_mode_densblk()
901 arg |= STp->block_size; in set_mode_densblk()
903 st_int_ioctl(STp, SET_DENS_AND_BLK, arg)) { in set_mode_densblk()
904 st_printk(KERN_WARNING, STp, in set_mode_densblk()
916 static int do_door_lock(struct scsi_tape * STp, int do_lock) in do_door_lock() argument
920 DEBC_printk(STp, "%socking drive door.\n", do_lock ? "L" : "Unl"); in do_door_lock()
922 retval = scsi_set_medium_removal(STp->device, in do_door_lock()
925 STp->door_locked = do_lock ? ST_LOCKED_EXPLICIT : ST_UNLOCKED; in do_door_lock()
927 STp->door_locked = ST_LOCK_FAILS; in do_door_lock()
933 static void reset_state(struct scsi_tape *STp) in reset_state() argument
938 STp->pos_unknown = 0; in reset_state()
940 STps = &(STp->ps[i]); in reset_state()
948 if (STp->can_partitions) { in reset_state()
949 STp->partition = find_partition(STp); in reset_state()
950 if (STp->partition < 0) in reset_state()
951 STp->partition = 0; in reset_state()
952 STp->new_partition = STp->partition; in reset_state()
965 static int test_ready(struct scsi_tape *STp, int do_wait) in test_ready() argument
971 struct st_cmdstatus *cmdstatp = &STp->buffer->cmdstat; in test_ready()
978 SRpnt = st_do_scsi(SRpnt, STp, cmd, 0, DMA_NONE, in test_ready()
979 STp->long_timeout, MAX_READY_RETRIES, 1); in test_ready()
982 retval = (STp->buffer)->syscall_result; in test_ready()
1012 if ((STp->device)->scsi_level >= SCSI_2 && in test_ready()
1022 retval = (STp->buffer)->syscall_result; in test_ready()
1039 static int check_tape(struct scsi_tape *STp, struct file *filp) in check_tape() argument
1050 STp->ready = ST_READY; in check_tape()
1052 if (mode != STp->current_mode) { in check_tape()
1053 DEBC_printk(STp, "Mode change from %d to %d.\n", in check_tape()
1054 STp->current_mode, mode); in check_tape()
1056 STp->current_mode = mode; in check_tape()
1058 STm = &(STp->modes[STp->current_mode]); in check_tape()
1060 saved_cleaning = STp->cleaning_req; in check_tape()
1061 STp->cleaning_req = 0; in check_tape()
1064 retval = test_ready(STp, do_wait); in check_tape()
1070 STp->pos_unknown = 0; in check_tape()
1071 STp->partition = STp->new_partition = 0; in check_tape()
1072 if (STp->can_partitions) in check_tape()
1073 STp->nbr_partitions = 1; /* This guess will be updated later in check_tape()
1076 STps = &(STp->ps[i]); in check_tape()
1087 STp->cleaning_req |= saved_cleaning; in check_tape()
1091 STp->ready = ST_NO_TAPE; in check_tape()
1093 STp->ready = ST_NOT_READY; in check_tape()
1095 STp->density = 0; /* Clear the erroneous "residue" */ in check_tape()
1096 STp->write_prot = 0; in check_tape()
1097 STp->block_size = 0; in check_tape()
1098 STp->ps[0].drv_file = STp->ps[0].drv_block = (-1); in check_tape()
1099 STp->partition = STp->new_partition = 0; in check_tape()
1100 STp->door_locked = ST_UNLOCKED; in check_tape()
1105 if (STp->omit_blklims) in check_tape()
1106 STp->min_block = STp->max_block = (-1); in check_tape()
1111 SRpnt = st_do_scsi(SRpnt, STp, cmd, 6, DMA_FROM_DEVICE, in check_tape()
1112 STp->device->request_queue->rq_timeout, in check_tape()
1115 retval = (STp->buffer)->syscall_result; in check_tape()
1119 if (!SRpnt->result && !STp->buffer->cmdstat.have_sense) { in check_tape()
1120 STp->max_block = ((STp->buffer)->b_data[1] << 16) | in check_tape()
1121 ((STp->buffer)->b_data[2] << 8) | (STp->buffer)->b_data[3]; in check_tape()
1122 STp->min_block = ((STp->buffer)->b_data[4] << 8) | in check_tape()
1123 (STp->buffer)->b_data[5]; in check_tape()
1124 if ( DEB( debugging || ) !STp->inited) in check_tape()
1125 st_printk(KERN_INFO, STp, in check_tape()
1127 STp->min_block, STp->max_block); in check_tape()
1129 STp->min_block = STp->max_block = (-1); in check_tape()
1130 DEBC_printk(STp, "Can't read block limits.\n"); in check_tape()
1138 SRpnt = st_do_scsi(SRpnt, STp, cmd, 12, DMA_FROM_DEVICE, in check_tape()
1139 STp->device->request_queue->rq_timeout, in check_tape()
1142 retval = (STp->buffer)->syscall_result; in check_tape()
1146 if ((STp->buffer)->syscall_result != 0) { in check_tape()
1147 DEBC_printk(STp, "No Mode Sense.\n"); in check_tape()
1148 STp->block_size = ST_DEFAULT_BLOCK; /* Educated guess (?) */ in check_tape()
1149 (STp->buffer)->syscall_result = 0; /* Prevent error propagation */ in check_tape()
1150 STp->drv_write_prot = 0; in check_tape()
1152 DEBC_printk(STp,"Mode sense. Length %d, " in check_tape()
1154 (STp->buffer)->b_data[0], in check_tape()
1155 (STp->buffer)->b_data[1], in check_tape()
1156 (STp->buffer)->b_data[2], in check_tape()
1157 (STp->buffer)->b_data[3]); in check_tape()
1159 if ((STp->buffer)->b_data[3] >= 8) { in check_tape()
1160 STp->drv_buffer = ((STp->buffer)->b_data[2] >> 4) & 7; in check_tape()
1161 STp->density = (STp->buffer)->b_data[4]; in check_tape()
1162 STp->block_size = (STp->buffer)->b_data[9] * 65536 + in check_tape()
1163 (STp->buffer)->b_data[10] * 256 + (STp->buffer)->b_data[11]; in check_tape()
1164 DEBC_printk(STp, "Density %x, tape length: %x, " in check_tape()
1166 STp->density, in check_tape()
1167 (STp->buffer)->b_data[5] * 65536 + in check_tape()
1168 (STp->buffer)->b_data[6] * 256 + in check_tape()
1169 (STp->buffer)->b_data[7], in check_tape()
1170 STp->drv_buffer); in check_tape()
1172 STp->drv_write_prot = ((STp->buffer)->b_data[2] & 0x80) != 0; in check_tape()
1173 if (!STp->drv_buffer && STp->immediate_filemark) { in check_tape()
1174 st_printk(KERN_WARNING, STp, in check_tape()
1177 STp->immediate_filemark = 0; in check_tape()
1182 STp->inited = 1; in check_tape()
1184 if (STp->block_size > 0) in check_tape()
1185 (STp->buffer)->buffer_blocks = in check_tape()
1186 (STp->buffer)->buffer_size / STp->block_size; in check_tape()
1188 (STp->buffer)->buffer_blocks = 1; in check_tape()
1189 (STp->buffer)->buffer_bytes = (STp->buffer)->read_pointer = 0; in check_tape()
1191 DEBC_printk(STp, "Block size: %d, buffer size: %d (%d blocks).\n", in check_tape()
1192 STp->block_size, (STp->buffer)->buffer_size, in check_tape()
1193 (STp->buffer)->buffer_blocks); in check_tape()
1195 if (STp->drv_write_prot) { in check_tape()
1196 STp->write_prot = 1; in check_tape()
1198 DEBC_printk(STp, "Write protected\n"); in check_tape()
1208 if (STp->can_partitions && STp->nbr_partitions < 1) { in check_tape()
1212 DEBC_printk(STp, "Updating partition number in status.\n"); in check_tape()
1213 if ((STp->partition = find_partition(STp)) < 0) { in check_tape()
1214 retval = STp->partition; in check_tape()
1217 STp->new_partition = STp->partition; in check_tape()
1218 STp->nbr_partitions = 1; /* This guess will be updated when necessary */ in check_tape()
1222 STp->density_changed = STp->blksize_changed = 0; in check_tape()
1223 STp->compression_changed = 0; in check_tape()
1225 (retval = set_mode_densblk(STp, STm)) < 0) in check_tape()
1228 if (STp->default_drvbuffer != 0xff) { in check_tape()
1229 if (st_int_ioctl(STp, MTSETDRVBUFFER, STp->default_drvbuffer)) in check_tape()
1230 st_printk(KERN_WARNING, STp, in check_tape()
1233 STp->default_drvbuffer); in check_tape()
1250 struct scsi_tape *STp; in st_open() local
1261 if (!(STp = scsi_tape_get(dev))) { in st_open()
1265 filp->private_data = STp; in st_open()
1268 if (STp->in_use) { in st_open()
1270 scsi_tape_put(STp); in st_open()
1271 DEBC_printk(STp, "Device already in use.\n"); in st_open()
1275 STp->in_use = 1; in st_open()
1277 STp->rew_at_close = STp->autorew_dev = (iminor(inode) & 0x80) == 0; in st_open()
1279 if (scsi_autopm_get_device(STp->device) < 0) { in st_open()
1284 if (!scsi_block_when_processing_errors(STp->device)) { in st_open()
1290 if (!enlarge_buffer(STp->buffer, PAGE_SIZE, STp->restr_dma)) { in st_open()
1291 st_printk(KERN_WARNING, STp, in st_open()
1297 (STp->buffer)->cleared = 0; in st_open()
1298 (STp->buffer)->writing = 0; in st_open()
1299 (STp->buffer)->syscall_result = 0; in st_open()
1301 STp->write_prot = ((filp->f_flags & O_ACCMODE) == O_RDONLY); in st_open()
1303 STp->dirty = 0; in st_open()
1305 STps = &(STp->ps[i]); in st_open()
1308 STp->try_dio_now = STp->try_dio; in st_open()
1309 STp->recover_count = 0; in st_open()
1310 DEB( STp->nbr_waits = STp->nbr_finished = 0; in st_open()
1311 STp->nbr_requests = STp->nbr_dio = STp->nbr_pages = 0; ) in st_open()
1313 retval = check_tape(STp, filp); in st_open()
1318 if (STp->ready == NO_TAPE) in st_open()
1327 normalize_buffer(STp->buffer); in st_open()
1329 STp->in_use = 0; in st_open()
1332 scsi_autopm_put_device(STp->device); in st_open()
1333 scsi_tape_put(STp); in st_open()
1345 struct scsi_tape *STp = filp->private_data; in st_flush() local
1346 struct st_modedef *STm = &(STp->modes[STp->current_mode]); in st_flush()
1347 struct st_partstat *STps = &(STp->ps[STp->partition]); in st_flush()
1352 if (STps->rw == ST_WRITING && !STp->pos_unknown) { in st_flush()
1353 result = st_flush_write_buffer(STp); in st_flush()
1358 if (STp->can_partitions && in st_flush()
1359 (result2 = switch_partition(STp)) < 0) { in st_flush()
1360 DEBC_printk(STp, "switch_partition at close failed.\n"); in st_flush()
1366 DEBC( if (STp->nbr_requests) in st_flush()
1367 st_printk(KERN_DEBUG, STp, in st_flush()
1369 "pages %d.\n", STp->nbr_requests, STp->nbr_dio, in st_flush()
1370 STp->nbr_pages)); in st_flush()
1372 if (STps->rw == ST_WRITING && !STp->pos_unknown) { in st_flush()
1373 struct st_cmdstatus *cmdstatp = &STp->buffer->cmdstat; in st_flush()
1376 DEBC_printk(STp, "Async write waits %d, finished %d.\n", in st_flush()
1377 STp->nbr_waits, STp->nbr_finished); in st_flush()
1381 if (STp->immediate_filemark) in st_flush()
1383 cmd[4] = 1 + STp->two_fm; in st_flush()
1385 SRpnt = st_do_scsi(NULL, STp, cmd, 0, DMA_NONE, in st_flush()
1386 STp->device->request_queue->rq_timeout, in st_flush()
1389 result = (STp->buffer)->syscall_result; in st_flush()
1393 if (STp->buffer->syscall_result == 0 || in st_flush()
1405 if (STp->two_fm) in st_flush()
1406 cross_eof(STp, 0); in st_flush()
1412 st_printk(KERN_ERR, STp, in st_flush()
1418 DEBC_printk(STp, "Buffer flushed, %d EOF(s) written\n", cmd[4]); in st_flush()
1419 } else if (!STp->rew_at_close) { in st_flush()
1420 STps = &(STp->ps[STp->partition]); in st_flush()
1422 if (STp->can_bsr) in st_flush()
1423 result = flush_buffer(STp, 0); in st_flush()
1425 result = cross_eof(STp, 0); in st_flush()
1435 !(result = cross_eof(STp, 1))) || in st_flush()
1445 if (STp->rew_at_close) { in st_flush()
1446 result2 = st_int_ioctl(STp, MTREW, 1); in st_flush()
1459 struct scsi_tape *STp = filp->private_data; in st_release() local
1461 if (STp->door_locked == ST_LOCKED_AUTO) in st_release()
1462 do_door_lock(STp, 0); in st_release()
1464 normalize_buffer(STp->buffer); in st_release()
1466 STp->in_use = 0; in st_release()
1468 scsi_autopm_put_device(STp->device); in st_release()
1469 scsi_tape_put(STp); in st_release()
1475 static ssize_t rw_checks(struct scsi_tape *STp, struct file *filp, size_t count) in rw_checks() argument
1485 if (!scsi_block_when_processing_errors(STp->device)) { in rw_checks()
1490 if (STp->ready != ST_READY) { in rw_checks()
1491 if (STp->ready == ST_NO_TAPE) in rw_checks()
1498 if (! STp->modes[STp->current_mode].defined) { in rw_checks()
1508 if (STp->pos_unknown) { in rw_checks()
1517 if (!STp->in_use) { in rw_checks()
1518 st_printk(ST_DEB_MSG, STp, in rw_checks()
1524 if (STp->can_partitions && in rw_checks()
1525 (retval = switch_partition(STp)) < 0) in rw_checks()
1528 if (STp->block_size == 0 && STp->max_block > 0 && in rw_checks()
1529 (count < STp->min_block || count > STp->max_block)) { in rw_checks()
1534 if (STp->do_auto_lock && STp->door_locked == ST_UNLOCKED && in rw_checks()
1535 !do_door_lock(STp, 1)) in rw_checks()
1536 STp->door_locked = ST_LOCKED_AUTO; in rw_checks()
1543 static int setup_buffering(struct scsi_tape *STp, const char __user *buf, in setup_buffering() argument
1547 struct st_buffer *STbp = STp->buffer; in setup_buffering()
1550 i = STp->try_dio_now && try_rdio; in setup_buffering()
1552 i = STp->try_dio_now && try_wdio; in setup_buffering()
1555 STp->device->request_queue)) == 0) { in setup_buffering()
1567 STp->nbr_dio++; in setup_buffering()
1568 STp->nbr_pages += STbp->do_dio; in setup_buffering()
1573 DEB( STp->nbr_requests++; ) in setup_buffering()
1576 if (STp->block_size) in setup_buffering()
1577 bufsize = STp->block_size > st_fixed_buffer_size ? in setup_buffering()
1578 STp->block_size : st_fixed_buffer_size; in setup_buffering()
1583 if (is_read && STp->sili && !STbp->cleared) in setup_buffering()
1588 !enlarge_buffer(STbp, bufsize, STp->restr_dma)) { in setup_buffering()
1589 st_printk(KERN_WARNING, STp, in setup_buffering()
1595 if (STp->block_size) in setup_buffering()
1596 STbp->buffer_blocks = bufsize / STp->block_size; in setup_buffering()
1605 static void release_buffering(struct scsi_tape *STp, int is_read) in release_buffering() argument
1609 STbp = STp->buffer; in release_buffering()
1630 struct scsi_tape *STp = filp->private_data; in st_write() local
1635 if (mutex_lock_interruptible(&STp->lock)) in st_write()
1638 retval = rw_checks(STp, filp, count); in st_write()
1643 if (STp->block_size != 0 && (count % STp->block_size) != 0) { in st_write()
1644 st_printk(KERN_WARNING, STp, in st_write()
1650 STm = &(STp->modes[STp->current_mode]); in st_write()
1651 STps = &(STp->ps[STp->partition]); in st_write()
1653 if (STp->write_prot) { in st_write()
1660 retval = flush_buffer(STp, 0); in st_write()
1666 if ((retval = set_mode_densblk(STp, STm)) < 0) in st_write()
1669 !(STp->compression_changed)) { in st_write()
1670 if (st_compression(STp, (STm->default_compression == ST_YES))) { in st_write()
1671 st_printk(KERN_WARNING, STp, in st_write()
1681 STbp = STp->buffer; in st_write()
1682 i = write_behind_check(STp); in st_write()
1702 if (STp->block_size != 0 && in st_write()
1710 retval = setup_buffering(STp, buf, count, 0); in st_write()
1718 cmd[1] = (STp->block_size != 0); in st_write()
1729 if (STp->block_size == 0) in st_write()
1732 do_count = STbp->buffer_blocks * STp->block_size - in st_write()
1747 async_write = STp->block_size == 0 && !STbp->do_dio && in st_write()
1750 if (STp->block_size != 0 && STm->do_buffer_writes && in st_write()
1751 !(STp->try_dio_now && try_wdio) && STps->eof < ST_EOM_OK && in st_write()
1753 STp->dirty = 1; in st_write()
1760 if (STp->block_size == 0) in st_write()
1767 blks /= STp->block_size; in st_write()
1768 transfer = blks * STp->block_size; in st_write()
1774 SRpnt = st_do_scsi(SRpnt, STp, cmd, transfer, DMA_TO_DEVICE, in st_write()
1775 STp->device->request_queue->rq_timeout, in st_write()
1783 STp->dirty = !(STbp->writing == in st_write()
1786 DEB( STp->write_pending = 1; ) in st_write()
1791 struct st_cmdstatus *cmdstatp = &STp->buffer->cmdstat; in st_write()
1793 DEBC_printk(STp, "Error on write:\n"); in st_write()
1798 else if (STp->block_size == 0 && in st_write()
1803 if (STp->block_size != 0) in st_write()
1804 undone *= STp->block_size; in st_write()
1810 if (STp->block_size) in st_write()
1811 blks = (transfer - undone) / STp->block_size; in st_write()
1817 if (STp->block_size == 0 || in st_write()
1820 DEBC_printk(STp, "EOM with %d " in st_write()
1828 move_buffer_data(STp->buffer, transfer - undone); in st_write()
1832 STp->block_size; in st_write()
1835 DEBC_printk(STp, "Retry " in st_write()
1838 STp->buffer->buffer_bytes); in st_write()
1849 DEBC_printk(STp, "EOM with " in st_write()
1862 if (STp->block_size == 0) in st_write()
1869 STp->dirty = 0; in st_write()
1887 release_buffering(STp, 0); in st_write()
1888 mutex_unlock(&STp->lock); in st_write()
1899 static long read_tape(struct scsi_tape *STp, long count, in read_tape() argument
1913 STm = &(STp->modes[STp->current_mode]); in read_tape()
1914 STps = &(STp->ps[STp->partition]); in read_tape()
1917 STbp = STp->buffer; in read_tape()
1919 if (STp->block_size == 0) in read_tape()
1922 if (!(STp->try_dio_now && try_rdio) && STm->do_read_ahead) { in read_tape()
1923 blks = (STp->buffer)->buffer_blocks; in read_tape()
1924 bytes = blks * STp->block_size; in read_tape()
1927 if (!STbp->do_dio && bytes > (STp->buffer)->buffer_size) in read_tape()
1928 bytes = (STp->buffer)->buffer_size; in read_tape()
1929 blks = bytes / STp->block_size; in read_tape()
1930 bytes = blks * STp->block_size; in read_tape()
1936 cmd[1] = (STp->block_size != 0); in read_tape()
1937 if (!cmd[1] && STp->sili) in read_tape()
1944 SRpnt = st_do_scsi(SRpnt, STp, cmd, bytes, DMA_FROM_DEVICE, in read_tape()
1945 STp->device->request_queue->rq_timeout, in read_tape()
1947 release_buffering(STp, 1); in read_tape()
1957 struct st_cmdstatus *cmdstatp = &STp->buffer->cmdstat; in read_tape()
1960 DEBC_printk(STp, in read_tape()
1977 if (STp->block_size == 0 && in read_tape()
1982 if (STp->block_size == 0 && in read_tape()
1984 st_printk(KERN_NOTICE, STp, in read_tape()
1994 } else if (STp->block_size == 0) { in read_tape()
2000 st_printk(KERN_NOTICE, STp, in read_tape()
2005 st_int_ioctl(STp, MTBSR, 1); in read_tape()
2010 STp->block_size; in read_tape()
2011 DEBC_printk(STp, "ILI but " in read_tape()
2018 if (st_int_ioctl(STp, MTBSR, 1)) in read_tape()
2026 if (STp->block_size == 0) in read_tape()
2030 bytes - transfer * STp->block_size; in read_tape()
2031 DEBC_printk(STp, "EOF detected (%d " in read_tape()
2039 if (STp->block_size == 0) in read_tape()
2043 bytes - transfer * STp->block_size; in read_tape()
2045 DEBC_printk(STp, "EOM detected (%d " in read_tape()
2052 DEBC_printk(STp, "Tape error while reading.\n"); in read_tape()
2056 DEBC_printk(STp, "Zero returned for " in read_tape()
2076 if (STp->sili) /* In fixed block mode residual is always zero here */ in read_tape()
2077 STbp->buffer_bytes -= STp->buffer->cmdstat.residual; in read_tape()
2081 if (STp->block_size == 0) in read_tape()
2084 STps->drv_block += STbp->buffer_bytes / STp->block_size; in read_tape()
2099 struct scsi_tape *STp = filp->private_data; in st_read() local
2102 struct st_buffer *STbp = STp->buffer; in st_read()
2104 if (mutex_lock_interruptible(&STp->lock)) in st_read()
2107 retval = rw_checks(STp, filp, count); in st_read()
2111 STm = &(STp->modes[STp->current_mode]); in st_read()
2112 if (STp->block_size != 0 && (count % STp->block_size) != 0) { in st_read()
2117 STp->try_dio_now = 0; /* Direct i/o can't handle split blocks */ in st_read()
2120 STps = &(STp->ps[STp->partition]); in st_read()
2122 retval = flush_buffer(STp, 0); in st_read()
2129 st_printk(ST_DEB_MSG, STp, in st_read()
2134 retval = setup_buffering(STp, buf, count, 1); in st_read()
2170 special = read_tape(STp, count - total, &SRpnt); in st_read()
2181 st_printk(ST_DEB_MSG, STp, in st_read()
2199 if (STp->block_size == 0) in st_read()
2229 release_buffering(STp, 1); in st_read()
2232 mutex_unlock(&STp->lock); in st_read()
2241 static void st_log_options(struct scsi_tape * STp, struct st_modedef * STm) in DEB() argument
2244 st_printk(KERN_INFO, STp, in DEB()
2247 STp->current_mode, STm->do_buffer_writes, in DEB()
2249 st_printk(KERN_INFO, STp, in DEB()
2252 STp->can_bsr, STp->two_fm, STp->fast_mteom, in DEB()
2253 STp->do_auto_lock); in DEB()
2254 st_printk(KERN_INFO, STp, in DEB()
2257 STm->defaults_for_writes, STp->omit_blklims, in DEB()
2258 STp->can_partitions, STp->scsi2_logical); in DEB()
2259 st_printk(KERN_INFO, STp, in DEB()
2262 STm->sysv, STp->immediate, STp->sili, in DEB()
2263 STp->immediate_filemark); in DEB()
2264 st_printk(KERN_INFO, STp, " debugging: %d\n", debugging); in DEB()
2270 static int st_set_options(struct scsi_tape *STp, long options)
2278 STm = &(STp->modes[STp->current_mode]);
2284 memcpy(STm, &(STp->modes[0]), sizeof(struct st_modedef));
2290 DEBC_printk(STp, "Initialized mode %d definition from mode 0\n",
2291 STp->current_mode);
2300 STp->two_fm = (options & MT_ST_TWO_FM) != 0;
2301 STp->fast_mteom = (options & MT_ST_FAST_MTEOM) != 0;
2302 STp->do_auto_lock = (options & MT_ST_AUTO_LOCK) != 0;
2303 STp->can_bsr = (options & MT_ST_CAN_BSR) != 0;
2304 STp->omit_blklims = (options & MT_ST_NO_BLKLIMS) != 0;
2305 if ((STp->device)->scsi_level >= SCSI_2)
2306 STp->can_partitions = (options & MT_ST_CAN_PARTITIONS) != 0;
2307 STp->scsi2_logical = (options & MT_ST_SCSI2LOGICAL) != 0;
2308 STp->immediate = (options & MT_ST_NOWAIT) != 0;
2309 STp->immediate_filemark = (options & MT_ST_NOWAIT_EOF) != 0;
2311 STp->sili = (options & MT_ST_SILI) != 0;
2313 st_log_options(STp, STm); )
2325 STp->two_fm = value;
2327 STp->fast_mteom = value;
2329 STp->do_auto_lock = value;
2331 STp->can_bsr = value;
2333 STp->omit_blklims = value;
2334 if ((STp->device)->scsi_level >= SCSI_2 &&
2336 STp->can_partitions = value;
2338 STp->scsi2_logical = value;
2340 STp->immediate = value;
2342 STp->immediate_filemark = value;
2346 STp->sili = value;
2350 st_log_options(STp, STm); )
2357 DEBC_printk(STp, "Default block size disabled.\n");
2360 DEBC_printk(STp,"Default block size set to "
2362 if (STp->ready == ST_READY) {
2363 STp->blksize_changed = 0;
2364 set_mode_densblk(STp, STm);
2370 STp->long_timeout = (value & ~MT_ST_SET_LONG_TIMEOUT) * HZ;
2371 DEBC_printk(STp, "Long timeout set to %d seconds.\n",
2374 blk_queue_rq_timeout(STp->device->request_queue,
2376 DEBC_printk(STp, "Normal timeout set to %d seconds.\n",
2385 STp->cln_mode = value;
2386 STp->cln_sense_mask = (options >> 8) & 0xff;
2387 STp->cln_sense_value = (options >> 16) & 0xff;
2388 st_printk(KERN_INFO, STp,
2390 value, STp->cln_sense_mask, STp->cln_sense_value);
2397 DEBC_printk(STp,
2401 DEBC_printk(STp, "Density default set to %x\n",
2403 if (STp->ready == ST_READY) {
2404 STp->density_changed = 0;
2405 set_mode_densblk(STp, STm);
2410 STp->default_drvbuffer = 0xff;
2411 DEBC_printk(STp,
2414 STp->default_drvbuffer = value & 7;
2415 DEBC_printk(STp,
2417 STp->default_drvbuffer);
2418 if (STp->ready == ST_READY)
2419 st_int_ioctl(STp, MTSETDRVBUFFER, STp->default_drvbuffer);
2424 DEBC_printk(STp,
2428 STp->c_algo = (value & 0xff00) >> 8;
2429 DEBC_printk(STp, "Compression "
2431 STp->c_algo);
2435 DEBC_printk(STp, "Compression default "
2438 if (STp->ready == ST_READY) {
2439 STp->compression_changed = 0;
2440 st_compression(STp, (STm->default_compression == ST_YES));
2473 static int read_mode_page(struct scsi_tape *STp, int page, int omit_block_descs) in read_mode_page() argument
2485 SRpnt = st_do_scsi(NULL, STp, cmd, cmd[4], DMA_FROM_DEVICE, in read_mode_page()
2486 STp->device->request_queue->rq_timeout, 0, 1); in read_mode_page()
2488 return (STp->buffer)->syscall_result; in read_mode_page()
2492 return STp->buffer->syscall_result; in read_mode_page()
2498 static int write_mode_page(struct scsi_tape *STp, int page, int slow) in write_mode_page() argument
2508 pgo = MODE_HEADER_LENGTH + (STp->buffer)->b_data[MH_OFF_BDESCS_LENGTH]; in write_mode_page()
2509 cmd[4] = pgo + (STp->buffer)->b_data[pgo + MP_OFF_PAGE_LENGTH] + 2; in write_mode_page()
2512 (STp->buffer)->b_data[MH_OFF_DATA_LENGTH] = 0; in write_mode_page()
2513 (STp->buffer)->b_data[MH_OFF_MEDIUM_TYPE] = 0; in write_mode_page()
2514 (STp->buffer)->b_data[MH_OFF_DEV_SPECIFIC] &= ~MH_BIT_WP; in write_mode_page()
2515 (STp->buffer)->b_data[pgo + MP_OFF_PAGE_NBR] &= MP_MSK_PAGE_NBR; in write_mode_page()
2518 STp->long_timeout : STp->device->request_queue->rq_timeout; in write_mode_page()
2519 SRpnt = st_do_scsi(NULL, STp, cmd, cmd[4], DMA_TO_DEVICE, in write_mode_page()
2522 return (STp->buffer)->syscall_result; in write_mode_page()
2526 return STp->buffer->syscall_result; in write_mode_page()
2547 static int st_compression(struct scsi_tape * STp, int state) in st_compression() argument
2551 unsigned char *b_data = (STp->buffer)->b_data; in st_compression()
2553 if (STp->ready != ST_READY) in st_compression()
2557 retval = read_mode_page(STp, COMPRESSION_PAGE, 0); in st_compression()
2559 DEBC_printk(STp, "Compression mode page not supported.\n"); in st_compression()
2564 DEBC_printk(STp, "Compression state is %d.\n", in st_compression()
2569 DEBC_printk(STp, "Compression not supported.\n"); in st_compression()
2576 if (STp->c_algo != 0) in st_compression()
2577 b_data[mpoffs + CP_OFF_C_ALGO] = STp->c_algo; in st_compression()
2581 if (STp->c_algo != 0) in st_compression()
2585 retval = write_mode_page(STp, COMPRESSION_PAGE, 0); in st_compression()
2587 DEBC_printk(STp, "Compression change failed.\n"); in st_compression()
2590 DEBC_printk(STp, "Compression state changed to %d.\n", state); in st_compression()
2592 STp->compression_changed = 1; in st_compression()
2598 static int do_load_unload(struct scsi_tape *STp, struct file *filp, int load_code) in do_load_unload() argument
2605 if (STp->ready != ST_READY && !load_code) { in do_load_unload()
2606 if (STp->ready == ST_NO_TAPE) in do_load_unload()
2621 DEBC_printk(STp, " Enhanced %sload slot %2d.\n", in do_load_unload()
2626 if (STp->immediate) { in do_load_unload()
2628 timeout = STp->device->request_queue->rq_timeout; in do_load_unload()
2631 timeout = STp->long_timeout; in do_load_unload()
2635 st_printk(ST_DEB_MSG, STp, "Unloading tape.\n"); in do_load_unload()
2637 st_printk(ST_DEB_MSG, STp, "Loading tape.\n"); in do_load_unload()
2640 SRpnt = st_do_scsi(NULL, STp, cmd, 0, DMA_NONE, in do_load_unload()
2643 return (STp->buffer)->syscall_result; in do_load_unload()
2645 retval = (STp->buffer)->syscall_result; in do_load_unload()
2651 STp->rew_at_close = 0; in do_load_unload()
2652 STp->ready = ST_NO_TAPE; in do_load_unload()
2655 STp->rew_at_close = STp->autorew_dev; in do_load_unload()
2656 retval = check_tape(STp, filp); in do_load_unload()
2662 STps = &(STp->ps[STp->partition]); in do_load_unload()
2672 static void deb_space_print(struct scsi_tape *STp, int direction, char *units, unsigned char *cmd) in deb_space_print() argument
2683 st_printk(ST_DEB_MSG, STp, "Spacing tape %s over %d %s.\n", in deb_space_print()
2689 static void deb_space_print(struct scsi_tape *STp, int direction, char *units, unsigned char *cmd) … in deb_space_print() argument
2694 static int st_int_ioctl(struct scsi_tape *STp, unsigned int cmd_in, unsigned long arg) in st_int_ioctl() argument
2706 WARN_ON(STp->buffer->do_dio != 0); in st_int_ioctl()
2707 if (STp->ready != ST_READY) { in st_int_ioctl()
2708 if (STp->ready == ST_NO_TAPE) in st_int_ioctl()
2713 timeout = STp->long_timeout; in st_int_ioctl()
2714 STps = &(STp->ps[STp->partition]); in st_int_ioctl()
2729 deb_space_print(STp, ST_DEB_FORWARD, "filemarks", cmd); in st_int_ioctl()
2744 deb_space_print(STp, ST_DEB_BACKWARD, "filemarks", cmd); in st_int_ioctl()
2756 deb_space_print(STp, ST_DEB_FORWARD, "blocks", cmd); in st_int_ioctl()
2768 deb_space_print(STp, ST_DEB_BACKWARD, "blocks", cmd); in st_int_ioctl()
2779 deb_space_print(STp, ST_DEB_FORWARD, "setmarks", cmd); in st_int_ioctl()
2792 deb_space_print(STp, ST_DEB_BACKWARD, "setmarks", cmd); in st_int_ioctl()
2801 if (STp->write_prot) in st_int_ioctl()
2807 (cmd_in == MTWEOF && STp->immediate_filemark)) in st_int_ioctl()
2812 timeout = STp->device->request_queue->rq_timeout; in st_int_ioctl()
2815 st_printk(ST_DEB_MSG, STp, in st_int_ioctl()
2821 st_printk(ST_DEB_MSG, STp, in st_int_ioctl()
2834 if (STp->immediate) { in st_int_ioctl()
2836 timeout = STp->device->request_queue->rq_timeout; in st_int_ioctl()
2838 DEBC_printk(STp, "Rewinding tape.\n"); in st_int_ioctl()
2842 DEBC_printk(STp, "No op on tape.\n"); in st_int_ioctl()
2847 if (STp->immediate) { in st_int_ioctl()
2849 timeout = STp->device->request_queue->rq_timeout; in st_int_ioctl()
2852 DEBC_printk(STp, "Retensioning tape.\n"); in st_int_ioctl()
2856 if (!STp->fast_mteom) { in st_int_ioctl()
2858 ioctl_result = st_int_ioctl(STp, MTFSF, 0x7fffff); in st_int_ioctl()
2870 DEBC_printk(STp, "Spacing to end of recorded medium.\n"); in st_int_ioctl()
2875 if (STp->write_prot) in st_int_ioctl()
2879 if (STp->immediate) { in st_int_ioctl()
2881 timeout = STp->device->request_queue->rq_timeout; in st_int_ioctl()
2884 timeout = STp->long_timeout * 8; in st_int_ioctl()
2886 DEBC_printk(STp, "Erasing tape.\n"); in st_int_ioctl()
2894 if (STp->dirty || (STp->buffer)->buffer_bytes != 0) in st_int_ioctl()
2898 STp->max_block > 0 && in st_int_ioctl()
2899 ((arg & MT_ST_BLKSIZE_MASK) < STp->min_block || in st_int_ioctl()
2900 (arg & MT_ST_BLKSIZE_MASK) > STp->max_block)) { in st_int_ioctl()
2901 st_printk(KERN_WARNING, STp, "Illegal block size.\n"); in st_int_ioctl()
2905 if ((STp->use_pf & USE_PF)) in st_int_ioctl()
2910 memset((STp->buffer)->b_data, 0, 12); in st_int_ioctl()
2912 (STp->buffer)->b_data[2] = (arg & 7) << 4; in st_int_ioctl()
2914 (STp->buffer)->b_data[2] = in st_int_ioctl()
2915 STp->drv_buffer << 4; in st_int_ioctl()
2916 (STp->buffer)->b_data[3] = 8; /* block descriptor length */ in st_int_ioctl()
2918 (STp->buffer)->b_data[4] = arg; in st_int_ioctl()
2919 STp->density_changed = 1; /* At least we tried ;-) */ in st_int_ioctl()
2921 (STp->buffer)->b_data[4] = arg >> 24; in st_int_ioctl()
2923 (STp->buffer)->b_data[4] = STp->density; in st_int_ioctl()
2927 STp->blksize_changed = 1; /* At least we tried ;-) */ in st_int_ioctl()
2929 ltmp = STp->block_size; in st_int_ioctl()
2930 (STp->buffer)->b_data[9] = (ltmp >> 16); in st_int_ioctl()
2931 (STp->buffer)->b_data[10] = (ltmp >> 8); in st_int_ioctl()
2932 (STp->buffer)->b_data[11] = ltmp; in st_int_ioctl()
2933 timeout = STp->device->request_queue->rq_timeout; in st_int_ioctl()
2936 st_printk(ST_DEB_MSG, STp, in st_int_ioctl()
2938 (STp->buffer)->b_data[9] * 65536 + in st_int_ioctl()
2939 (STp->buffer)->b_data[10] * 256 + in st_int_ioctl()
2940 (STp->buffer)->b_data[11]); in st_int_ioctl()
2942 st_printk(ST_DEB_MSG, STp, in st_int_ioctl()
2944 (STp->buffer)->b_data[4]); in st_int_ioctl()
2946 st_printk(ST_DEB_MSG, STp, in st_int_ioctl()
2948 ((STp->buffer)->b_data[2] >> 4) & 7); in st_int_ioctl()
2955 SRpnt = st_do_scsi(NULL, STp, cmd, datalen, direction, in st_int_ioctl()
2958 return (STp->buffer)->syscall_result; in st_int_ioctl()
2960 ioctl_result = (STp->buffer)->syscall_result; in st_int_ioctl()
2970 ioctl_result = st_int_ioctl(STp, MTFSF, 1); in st_int_ioctl()
2972 ioctl_result = st_int_ioctl(STp, MTBSF, 1); in st_int_ioctl()
2975 STp->block_size = arg & MT_ST_BLKSIZE_MASK; in st_int_ioctl()
2976 if (STp->block_size != 0) { in st_int_ioctl()
2977 (STp->buffer)->buffer_blocks = in st_int_ioctl()
2978 (STp->buffer)->buffer_size / STp->block_size; in st_int_ioctl()
2980 (STp->buffer)->buffer_bytes = (STp->buffer)->read_pointer = 0; in st_int_ioctl()
2982 STp->density = arg >> MT_ST_DENSITY_SHIFT; in st_int_ioctl()
2984 STp->drv_buffer = (arg & 7); in st_int_ioctl()
2986 STp->density = arg; in st_int_ioctl()
2999 struct st_cmdstatus *cmdstatp = &STp->buffer->cmdstat; in st_int_ioctl()
3074 !(STp->use_pf & PF_TESTED)) { in st_int_ioctl()
3077 STp->use_pf = (STp->use_pf ^ USE_PF) | PF_TESTED; in st_int_ioctl()
3080 return st_int_ioctl(STp, cmd_in, arg); in st_int_ioctl()
3099 static int get_location(struct scsi_tape *STp, unsigned int *block, int *partition, in get_location() argument
3106 if (STp->ready != ST_READY) in get_location()
3110 if ((STp->device)->scsi_level < SCSI_2) { in get_location()
3115 if (!logical && !STp->scsi2_logical) in get_location()
3118 SRpnt = st_do_scsi(NULL, STp, scmd, 20, DMA_FROM_DEVICE, in get_location()
3119 STp->device->request_queue->rq_timeout, in get_location()
3122 return (STp->buffer)->syscall_result; in get_location()
3124 if ((STp->buffer)->syscall_result != 0 || in get_location()
3125 (STp->device->scsi_level >= SCSI_2 && in get_location()
3126 ((STp->buffer)->b_data[0] & 4) != 0)) { in get_location()
3128 DEBC_printk(STp, " Can't read tape position.\n"); in get_location()
3132 if ((STp->device)->scsi_level < SCSI_2) { in get_location()
3133 *block = ((STp->buffer)->b_data[0] << 16) in get_location()
3134 + ((STp->buffer)->b_data[1] << 8) in get_location()
3135 + (STp->buffer)->b_data[2]; in get_location()
3138 *block = ((STp->buffer)->b_data[4] << 24) in get_location()
3139 + ((STp->buffer)->b_data[5] << 16) in get_location()
3140 + ((STp->buffer)->b_data[6] << 8) in get_location()
3141 + (STp->buffer)->b_data[7]; in get_location()
3142 *partition = (STp->buffer)->b_data[1]; in get_location()
3143 if (((STp->buffer)->b_data[0] & 0x80) && in get_location()
3144 (STp->buffer)->b_data[1] == 0) /* BOP of partition 0 */ in get_location()
3145 STp->ps[0].drv_block = STp->ps[0].drv_file = 0; in get_location()
3147 DEBC_printk(STp, "Got tape pos. blk %d part %d.\n", in get_location()
3159 static int set_location(struct scsi_tape *STp, unsigned int block, int partition, in set_location() argument
3169 if (STp->ready != ST_READY) in set_location()
3171 timeout = STp->long_timeout; in set_location()
3172 STps = &(STp->ps[STp->partition]); in set_location()
3174 DEBC_printk(STp, "Setting block to %d and partition to %d.\n", in set_location()
3180 if ((!STp->can_partitions && partition != 0) || in set_location()
3183 if (partition != STp->partition) { in set_location()
3184 if (get_location(STp, &blk, &p, 1)) in set_location()
3189 DEBC_printk(STp, "Visited block %d for " in set_location()
3191 blk, STp->partition); in set_location()
3196 if ((STp->device)->scsi_level < SCSI_2) { in set_location()
3208 if (!logical && !STp->scsi2_logical) in set_location()
3210 if (STp->partition != partition) { in set_location()
3213 DEBC_printk(STp, "Trying to change partition " in set_location()
3214 "from %d to %d\n", STp->partition, in set_location()
3218 if (STp->immediate) { in set_location()
3220 timeout = STp->device->request_queue->rq_timeout; in set_location()
3223 SRpnt = st_do_scsi(NULL, STp, scmd, 0, DMA_NONE, in set_location()
3226 return (STp->buffer)->syscall_result; in set_location()
3230 if ((STp->buffer)->syscall_result != 0) { in set_location()
3232 if (STp->can_partitions && in set_location()
3233 (STp->device)->scsi_level >= SCSI_2 && in set_location()
3234 (p = find_partition(STp)) >= 0) in set_location()
3235 STp->partition = p; in set_location()
3237 if (STp->can_partitions) { in set_location()
3238 STp->partition = partition; in set_location()
3239 STps = &(STp->ps[partition]); in set_location()
3261 static int find_partition(struct scsi_tape *STp) in find_partition() argument
3266 if ((i = get_location(STp, &block, &partition, 1)) < 0) in find_partition()
3275 static int switch_partition(struct scsi_tape *STp) in switch_partition() argument
3279 if (STp->partition == STp->new_partition) in switch_partition()
3281 STps = &(STp->ps[STp->new_partition]); in switch_partition()
3284 return set_location(STp, STps->last_block_visited, STp->new_partition, 1); in switch_partition()
3303 static int nbr_partitions(struct scsi_tape *STp) in nbr_partitions() argument
3307 if (STp->ready != ST_READY) in nbr_partitions()
3310 result = read_mode_page(STp, PART_PAGE, 1); in nbr_partitions()
3313 DEBC_printk(STp, "Can't read medium partition page.\n"); in nbr_partitions()
3316 result = (STp->buffer)->b_data[MODE_HEADER_LENGTH + in nbr_partitions()
3318 DEBC_printk(STp, "Number of partitions %d.\n", result); in nbr_partitions()
3344 static int partition_tape(struct scsi_tape *STp, int size) in partition_tape() argument
3350 result = read_mode_page(STp, PART_PAGE, 0); in partition_tape()
3352 DEBC_printk(STp, "Can't read partition mode page.\n"); in partition_tape()
3356 bp = (STp->buffer)->b_data; in partition_tape()
3358 DEBC_printk(STp, "Partition page length is %d bytes.\n", in partition_tape()
3369 DEBC_printk(STp, "psd_cnt %d, max.parts %d, nbr_parts %d\n", in partition_tape()
3377 DEBC_printk(STp, "Formatting tape with one partition.\n"); in partition_tape()
3384 DEBC_printk(STp, "Formatting tape with two partitions " in partition_tape()
3391 result = write_mode_page(STp, PART_PAGE, 1); in partition_tape()
3393 st_printk(KERN_INFO, STp, "Partitioning of tape failed.\n"); in partition_tape()
3408 struct scsi_tape *STp = file->private_data; in st_ioctl() local
3413 if (mutex_lock_interruptible(&STp->lock)) in st_ioctl()
3417 if (debugging && !STp->in_use) { in st_ioctl()
3418 st_printk(ST_DEB_MSG, STp, "Incorrect device.\n"); in st_ioctl()
3423 STm = &(STp->modes[STp->current_mode]); in st_ioctl()
3424 STps = &(STp->ps[STp->partition]); in st_ioctl()
3432 retval = scsi_ioctl_block_when_processing_errors(STp->device, cmd_in, in st_ioctl()
3455 st_printk(KERN_WARNING, STp, in st_ioctl()
3467 if (!STp->pos_unknown) { in st_ioctl()
3485 i = !STp->can_partitions || in st_ioctl()
3486 (STp->new_partition != STp->partition); in st_ioctl()
3495 i = flush_buffer(STp, i); in st_ioctl()
3504 i = st_int_ioctl(STp, MTWEOF, 1); in st_ioctl()
3529 reset_state(STp); in st_ioctl()
3531 STp->device->was_reset = 0; in st_ioctl()
3539 if (mtc.mt_op == MTOFFL && STp->door_locked != ST_UNLOCKED) in st_ioctl()
3540 do_door_lock(STp, 0); /* Ignore result! */ in st_ioctl()
3544 retval = st_set_options(STp, mtc.mt_count); in st_ioctl()
3549 if (!STp->can_partitions || in st_ioctl()
3554 if (mtc.mt_count >= STp->nbr_partitions && in st_ioctl()
3555 (STp->nbr_partitions = nbr_partitions(STp)) < 0) { in st_ioctl()
3559 if (mtc.mt_count >= STp->nbr_partitions) { in st_ioctl()
3563 STp->new_partition = mtc.mt_count; in st_ioctl()
3569 if (!STp->can_partitions) { in st_ioctl()
3573 if ((i = st_int_ioctl(STp, MTREW, 0)) < 0 || in st_ioctl()
3574 (i = partition_tape(STp, mtc.mt_count)) < 0) { in st_ioctl()
3579 STp->ps[i].rw = ST_IDLE; in st_ioctl()
3580 STp->ps[i].at_sm = 0; in st_ioctl()
3581 STp->ps[i].last_block_valid = 0; in st_ioctl()
3583 STp->partition = STp->new_partition = 0; in st_ioctl()
3584 STp->nbr_partitions = 1; /* Bad guess ?-) */ in st_ioctl()
3591 i = set_location(STp, mtc.mt_count, STp->new_partition, 0); in st_ioctl()
3592 if (!STp->can_partitions) in st_ioctl()
3593 STp->ps[0].rw = ST_IDLE; in st_ioctl()
3599 retval = do_load_unload(STp, file, 0); in st_ioctl()
3604 retval = do_load_unload(STp, file, max(1, mtc.mt_count)); in st_ioctl()
3609 retval = do_door_lock(STp, (mtc.mt_op == MTLOCK)); in st_ioctl()
3613 if (STp->can_partitions && STp->ready == ST_READY && in st_ioctl()
3614 (i = switch_partition(STp)) < 0) { in st_ioctl()
3620 retval = st_compression(STp, (mtc.mt_count & 1)); in st_ioctl()
3622 retval = st_int_ioctl(STp, mtc.mt_op, mtc.mt_count); in st_ioctl()
3630 if ((i = flush_buffer(STp, 0)) < 0) { in st_ioctl()
3634 if (STp->can_partitions && in st_ioctl()
3635 (i = switch_partition(STp)) < 0) { in st_ioctl()
3648 mt_status.mt_type = STp->tape_type; in st_ioctl()
3650 ((STp->block_size << MT_ST_BLKSIZE_SHIFT) & MT_ST_BLKSIZE_MASK) | in st_ioctl()
3651 ((STp->density << MT_ST_DENSITY_SHIFT) & MT_ST_DENSITY_MASK); in st_ioctl()
3654 if (STp->block_size != 0) { in st_ioctl()
3657 (STp->buffer)->buffer_bytes / STp->block_size; in st_ioctl()
3660 ((STp->buffer)->buffer_bytes + in st_ioctl()
3661 STp->block_size - 1) / STp->block_size; in st_ioctl()
3665 if (STp->drv_write_prot) in st_ioctl()
3673 mt_status.mt_erreg = (STp->recover_reg << MT_ST_SOFTERR_SHIFT); in st_ioctl()
3674 mt_status.mt_resid = STp->partition; in st_ioctl()
3679 if (STp->density == 1) in st_ioctl()
3681 else if (STp->density == 2) in st_ioctl()
3683 else if (STp->density == 3) in st_ioctl()
3685 if (STp->ready == ST_READY) in st_ioctl()
3687 if (STp->ready == ST_NO_TAPE) in st_ioctl()
3692 (STm->do_buffer_writes && STp->block_size != 0) || in st_ioctl()
3693 STp->drv_buffer != 0) in st_ioctl()
3695 if (STp->cleaning_req) in st_ioctl()
3704 STp->recover_reg = 0; /* Clear after read */ in st_ioctl()
3714 if ((i = get_location(STp, &blk, &bt, 0)) < 0) { in st_ioctl()
3724 mutex_unlock(&STp->lock); in st_ioctl()
3736 i = scsi_cmd_ioctl(STp->disk->queue, STp->disk, in st_ioctl()
3742 retval = scsi_ioctl(STp->device, cmd_in, p); in st_ioctl()
3744 STp->rew_at_close = 0; in st_ioctl()
3745 STp->ready = ST_NO_TAPE; in st_ioctl()
3750 mutex_unlock(&STp->lock); in st_ioctl()
3757 struct scsi_tape *STp = file->private_data; in st_compat_ioctl() local
3758 struct scsi_device *sdev = STp->device; in st_compat_ioctl()
4549 struct scsi_tape *STp = STm->tape; in options_show() local
4557 options |= STp->two_fm ? MT_ST_TWO_FM : 0; in options_show()
4558 options |= STp->fast_mteom ? MT_ST_FAST_MTEOM : 0; in options_show()
4560 options |= STp->can_bsr ? MT_ST_CAN_BSR : 0; in options_show()
4561 options |= STp->omit_blklims ? MT_ST_NO_BLKLIMS : 0; in options_show()
4562 options |= STp->can_partitions ? MT_ST_CAN_PARTITIONS : 0; in options_show()
4563 options |= STp->scsi2_logical ? MT_ST_SCSI2LOGICAL : 0; in options_show()
4565 options |= STp->immediate ? MT_ST_NOWAIT : 0; in options_show()
4566 options |= STp->immediate_filemark ? MT_ST_NOWAIT_EOF : 0; in options_show()
4567 options |= STp->sili ? MT_ST_SILI : 0; in options_show()