Lines Matching refs:STp
245 struct scsi_tape *STp = NULL; in scsi_tape_get() local
250 STp = idr_find(&st_index_idr, dev); in scsi_tape_get()
251 if (!STp) goto out; in scsi_tape_get()
253 kref_get(&STp->kref); in scsi_tape_get()
255 if (!STp->device) in scsi_tape_get()
258 if (scsi_device_get(STp->device)) in scsi_tape_get()
264 kref_put(&STp->kref, scsi_tape_release); in scsi_tape_get()
265 STp = NULL; in scsi_tape_get()
269 return STp; in scsi_tape_get()
272 static void scsi_tape_put(struct scsi_tape *STp) in scsi_tape_put() argument
274 struct scsi_device *sdev = STp->device; in scsi_tape_put()
277 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 = STp->name; 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
480 now = ktime_sub(now, STp->stats->write_time); in st_do_stats()
481 atomic64_add(ktime_to_ns(now), &STp->stats->tot_write_time); in st_do_stats()
482 atomic64_add(ktime_to_ns(now), &STp->stats->tot_io_time); in st_do_stats()
483 atomic64_inc(&STp->stats->write_cnt); in st_do_stats()
485 atomic64_add(atomic_read(&STp->stats->last_write_size) in st_do_stats()
486 - STp->buffer->cmdstat.residual, in st_do_stats()
487 &STp->stats->write_byte_cnt); in st_do_stats()
488 if (STp->buffer->cmdstat.residual > 0) in st_do_stats()
489 atomic64_inc(&STp->stats->resid_cnt); in st_do_stats()
491 atomic64_add(atomic_read(&STp->stats->last_write_size), in st_do_stats()
492 &STp->stats->write_byte_cnt); in st_do_stats()
494 now = ktime_sub(now, STp->stats->read_time); in st_do_stats()
495 atomic64_add(ktime_to_ns(now), &STp->stats->tot_read_time); in st_do_stats()
496 atomic64_add(ktime_to_ns(now), &STp->stats->tot_io_time); in st_do_stats()
497 atomic64_inc(&STp->stats->read_cnt); in st_do_stats()
499 atomic64_add(atomic_read(&STp->stats->last_read_size) in st_do_stats()
500 - STp->buffer->cmdstat.residual, in st_do_stats()
501 &STp->stats->read_byte_cnt); in st_do_stats()
502 if (STp->buffer->cmdstat.residual > 0) in st_do_stats()
503 atomic64_inc(&STp->stats->resid_cnt); in st_do_stats()
505 atomic64_add(atomic_read(&STp->stats->last_read_size), in st_do_stats()
506 &STp->stats->read_byte_cnt); in st_do_stats()
508 now = ktime_sub(now, STp->stats->other_time); in st_do_stats()
509 atomic64_add(ktime_to_ns(now), &STp->stats->tot_io_time); in st_do_stats()
510 atomic64_inc(&STp->stats->other_cnt); in st_do_stats()
512 atomic64_dec(&STp->stats->in_flight); in st_do_stats()
520 struct scsi_tape *STp = SRpnt->stp; in st_scsi_execute_end() local
523 STp->buffer->cmdstat.midlevel_result = SRpnt->result = scmd->result; in st_scsi_execute_end()
524 STp->buffer->cmdstat.residual = scmd->resid_len; in st_scsi_execute_end()
526 st_do_stats(STp, req); in st_scsi_execute_end()
546 struct scsi_tape *STp = SRpnt->stp; in st_scsi_execute() local
568 atomic64_inc(&STp->stats->in_flight); in st_scsi_execute()
570 atomic_set(&STp->stats->last_write_size, bufflen); in st_scsi_execute()
571 STp->stats->write_time = ktime_get(); in st_scsi_execute()
573 atomic_set(&STp->stats->last_read_size, bufflen); in st_scsi_execute()
574 STp->stats->read_time = ktime_get(); in st_scsi_execute()
576 STp->stats->other_time = ktime_get(); in st_scsi_execute()
595 st_do_scsi(struct st_request * SRpnt, struct scsi_tape * STp, unsigned char *cmd, in st_do_scsi() argument
599 struct rq_map_data *mdata = &STp->buffer->map_data; in st_do_scsi()
603 if (!do_wait && ((STp->buffer)->last_SRpnt)) { in st_do_scsi()
604 st_printk(KERN_ERR, STp, in st_do_scsi()
607 (STp->buffer)->syscall_result = (-EINTR); in st_do_scsi()
609 (STp->buffer)->syscall_result = (-EBUSY); in st_do_scsi()
614 SRpnt = st_allocate_request(STp); in st_do_scsi()
622 (STp->buffer)->last_SRpnt = SRpnt; in st_do_scsi()
624 waiting = &STp->wait; in st_do_scsi()
628 if (STp->buffer->do_dio) { in st_do_scsi()
630 mdata->nr_entries = STp->buffer->sg_segs; in st_do_scsi()
631 mdata->pages = STp->buffer->mapped_pages; in st_do_scsi()
633 mdata->page_order = STp->buffer->reserved_page_order; in st_do_scsi()
636 mdata->pages = STp->buffer->reserved_pages; in st_do_scsi()
641 STp->buffer->cmdstat.have_sense = 0; in st_do_scsi()
642 STp->buffer->syscall_result = 0; in st_do_scsi()
648 (STp->buffer)->syscall_result = (-EBUSY); in st_do_scsi()
649 (STp->buffer)->last_SRpnt = NULL; in st_do_scsi()
653 (STp->buffer)->syscall_result = st_chk_result(STp, SRpnt); in st_do_scsi()
664 static int write_behind_check(struct scsi_tape * STp) in write_behind_check() argument
672 STbuffer = STp->buffer; in write_behind_check()
677 if (STp->write_pending) in write_behind_check()
678 STp->nbr_waits++; in write_behind_check()
680 STp->nbr_finished++; in write_behind_check()
683 wait_for_completion(&(STp->wait)); in write_behind_check()
688 (STp->buffer)->syscall_result = st_chk_result(STp, SRpnt); in write_behind_check()
692 STps = &(STp->ps[STp->partition]); in write_behind_check()
694 if (STp->block_size == 0) in write_behind_check()
697 STps->drv_block += STbuffer->writing / STp->block_size; in write_behind_check()
718 st_printk(ST_DEB_MSG, STp, in write_behind_check()
728 static int cross_eof(struct scsi_tape * STp, int forward) in cross_eof() argument
742 DEBC_printk(STp, "Stepping over filemark %s.\n", in cross_eof()
745 SRpnt = st_do_scsi(NULL, STp, cmd, 0, DMA_NONE, in cross_eof()
746 STp->device->request_queue->rq_timeout, in cross_eof()
749 return (STp->buffer)->syscall_result; in cross_eof()
754 if ((STp->buffer)->cmdstat.midlevel_result != 0) in cross_eof()
755 st_printk(KERN_ERR, STp, in cross_eof()
759 return (STp->buffer)->syscall_result; in cross_eof()
764 static int st_flush_write_buffer(struct scsi_tape * STp) in st_flush_write_buffer() argument
772 result = write_behind_check(STp); in st_flush_write_buffer()
777 if (STp->dirty == 1) { in st_flush_write_buffer()
779 transfer = STp->buffer->buffer_bytes; in st_flush_write_buffer()
780 DEBC_printk(STp, "Flushing %d bytes.\n", transfer); in st_flush_write_buffer()
785 blks = transfer / STp->block_size; in st_flush_write_buffer()
790 SRpnt = st_do_scsi(NULL, STp, cmd, transfer, DMA_TO_DEVICE, in st_flush_write_buffer()
791 STp->device->request_queue->rq_timeout, in st_flush_write_buffer()
794 return (STp->buffer)->syscall_result; in st_flush_write_buffer()
796 STps = &(STp->ps[STp->partition]); in st_flush_write_buffer()
797 if ((STp->buffer)->syscall_result != 0) { in st_flush_write_buffer()
798 struct st_cmdstatus *cmdstatp = &STp->buffer->cmdstat; in st_flush_write_buffer()
806 STp->dirty = 0; in st_flush_write_buffer()
807 (STp->buffer)->buffer_bytes = 0; in st_flush_write_buffer()
812 st_printk(KERN_ERR, STp, "Error on flush.\n"); in st_flush_write_buffer()
819 STp->dirty = 0; in st_flush_write_buffer()
820 (STp->buffer)->buffer_bytes = 0; in st_flush_write_buffer()
831 static int flush_buffer(struct scsi_tape *STp, int seek_next) in flush_buffer() argument
840 if (STp->pos_unknown) in flush_buffer()
843 if (STp->ready != ST_READY) in flush_buffer()
845 STps = &(STp->ps[STp->partition]); in flush_buffer()
847 return st_flush_write_buffer(STp); in flush_buffer()
849 if (STp->block_size == 0) in flush_buffer()
852 backspace = ((STp->buffer)->buffer_bytes + in flush_buffer()
853 (STp->buffer)->read_pointer) / STp->block_size - in flush_buffer()
854 ((STp->buffer)->read_pointer + STp->block_size - 1) / in flush_buffer()
855 STp->block_size; in flush_buffer()
856 (STp->buffer)->buffer_bytes = 0; in flush_buffer()
857 (STp->buffer)->read_pointer = 0; in flush_buffer()
861 result = cross_eof(STp, 0); /* Back over the EOF hit */ in flush_buffer()
871 result = st_int_ioctl(STp, MTBSR, backspace); in flush_buffer()
883 static int set_mode_densblk(struct scsi_tape * STp, struct st_modedef * STm) in set_mode_densblk() argument
888 if (!STp->density_changed && in set_mode_densblk()
890 STm->default_density != STp->density) { in set_mode_densblk()
894 arg = STp->density; in set_mode_densblk()
896 if (!STp->blksize_changed && in set_mode_densblk()
898 STm->default_blksize != STp->block_size) { in set_mode_densblk()
902 arg |= STp->block_size; in set_mode_densblk()
904 st_int_ioctl(STp, SET_DENS_AND_BLK, arg)) { in set_mode_densblk()
905 st_printk(KERN_WARNING, STp, in set_mode_densblk()
917 static int do_door_lock(struct scsi_tape * STp, int do_lock) in do_door_lock() argument
921 DEBC_printk(STp, "%socking drive door.\n", do_lock ? "L" : "Unl"); in do_door_lock()
923 retval = scsi_set_medium_removal(STp->device, in do_door_lock()
926 STp->door_locked = do_lock ? ST_LOCKED_EXPLICIT : ST_UNLOCKED; in do_door_lock()
928 STp->door_locked = ST_LOCK_FAILS; in do_door_lock()
934 static void reset_state(struct scsi_tape *STp) in reset_state() argument
939 STp->pos_unknown = 0; in reset_state()
941 STps = &(STp->ps[i]); in reset_state()
949 if (STp->can_partitions) { in reset_state()
950 STp->partition = find_partition(STp); in reset_state()
951 if (STp->partition < 0) in reset_state()
952 STp->partition = 0; in reset_state()
953 STp->new_partition = STp->partition; in reset_state()
966 static int test_ready(struct scsi_tape *STp, int do_wait) in test_ready() argument
972 struct st_cmdstatus *cmdstatp = &STp->buffer->cmdstat; in test_ready()
979 SRpnt = st_do_scsi(SRpnt, STp, cmd, 0, DMA_NONE, in test_ready()
980 STp->long_timeout, MAX_READY_RETRIES, 1); in test_ready()
983 retval = (STp->buffer)->syscall_result; in test_ready()
1013 if ((STp->device)->scsi_level >= SCSI_2 && in test_ready()
1023 retval = (STp->buffer)->syscall_result; in test_ready()
1040 static int check_tape(struct scsi_tape *STp, struct file *filp) in check_tape() argument
1051 STp->ready = ST_READY; in check_tape()
1053 if (mode != STp->current_mode) { in check_tape()
1054 DEBC_printk(STp, "Mode change from %d to %d.\n", in check_tape()
1055 STp->current_mode, mode); in check_tape()
1057 STp->current_mode = mode; in check_tape()
1059 STm = &(STp->modes[STp->current_mode]); in check_tape()
1061 saved_cleaning = STp->cleaning_req; in check_tape()
1062 STp->cleaning_req = 0; in check_tape()
1065 retval = test_ready(STp, do_wait); in check_tape()
1071 STp->pos_unknown = 0; in check_tape()
1072 STp->partition = STp->new_partition = 0; in check_tape()
1073 if (STp->can_partitions) in check_tape()
1074 STp->nbr_partitions = 1; /* This guess will be updated later in check_tape()
1077 STps = &(STp->ps[i]); in check_tape()
1088 STp->cleaning_req |= saved_cleaning; in check_tape()
1092 STp->ready = ST_NO_TAPE; in check_tape()
1094 STp->ready = ST_NOT_READY; in check_tape()
1096 STp->density = 0; /* Clear the erroneous "residue" */ in check_tape()
1097 STp->write_prot = 0; in check_tape()
1098 STp->block_size = 0; in check_tape()
1099 STp->ps[0].drv_file = STp->ps[0].drv_block = (-1); in check_tape()
1100 STp->partition = STp->new_partition = 0; in check_tape()
1101 STp->door_locked = ST_UNLOCKED; in check_tape()
1106 if (STp->omit_blklims) in check_tape()
1107 STp->min_block = STp->max_block = (-1); in check_tape()
1112 SRpnt = st_do_scsi(SRpnt, STp, cmd, 6, DMA_FROM_DEVICE, in check_tape()
1113 STp->device->request_queue->rq_timeout, in check_tape()
1116 retval = (STp->buffer)->syscall_result; in check_tape()
1120 if (!SRpnt->result && !STp->buffer->cmdstat.have_sense) { in check_tape()
1121 STp->max_block = ((STp->buffer)->b_data[1] << 16) | in check_tape()
1122 ((STp->buffer)->b_data[2] << 8) | (STp->buffer)->b_data[3]; in check_tape()
1123 STp->min_block = ((STp->buffer)->b_data[4] << 8) | in check_tape()
1124 (STp->buffer)->b_data[5]; in check_tape()
1125 if ( DEB( debugging || ) !STp->inited) in check_tape()
1126 st_printk(KERN_INFO, STp, in check_tape()
1128 STp->min_block, STp->max_block); in check_tape()
1130 STp->min_block = STp->max_block = (-1); in check_tape()
1131 DEBC_printk(STp, "Can't read block limits.\n"); in check_tape()
1139 SRpnt = st_do_scsi(SRpnt, STp, cmd, 12, DMA_FROM_DEVICE, in check_tape()
1140 STp->device->request_queue->rq_timeout, in check_tape()
1143 retval = (STp->buffer)->syscall_result; in check_tape()
1147 if ((STp->buffer)->syscall_result != 0) { in check_tape()
1148 DEBC_printk(STp, "No Mode Sense.\n"); in check_tape()
1149 STp->block_size = ST_DEFAULT_BLOCK; /* Educated guess (?) */ in check_tape()
1150 (STp->buffer)->syscall_result = 0; /* Prevent error propagation */ in check_tape()
1151 STp->drv_write_prot = 0; in check_tape()
1153 DEBC_printk(STp,"Mode sense. Length %d, " in check_tape()
1155 (STp->buffer)->b_data[0], in check_tape()
1156 (STp->buffer)->b_data[1], in check_tape()
1157 (STp->buffer)->b_data[2], in check_tape()
1158 (STp->buffer)->b_data[3]); in check_tape()
1160 if ((STp->buffer)->b_data[3] >= 8) { in check_tape()
1161 STp->drv_buffer = ((STp->buffer)->b_data[2] >> 4) & 7; in check_tape()
1162 STp->density = (STp->buffer)->b_data[4]; in check_tape()
1163 STp->block_size = (STp->buffer)->b_data[9] * 65536 + in check_tape()
1164 (STp->buffer)->b_data[10] * 256 + (STp->buffer)->b_data[11]; in check_tape()
1165 DEBC_printk(STp, "Density %x, tape length: %x, " in check_tape()
1167 STp->density, in check_tape()
1168 (STp->buffer)->b_data[5] * 65536 + in check_tape()
1169 (STp->buffer)->b_data[6] * 256 + in check_tape()
1170 (STp->buffer)->b_data[7], in check_tape()
1171 STp->drv_buffer); in check_tape()
1173 STp->drv_write_prot = ((STp->buffer)->b_data[2] & 0x80) != 0; in check_tape()
1174 if (!STp->drv_buffer && STp->immediate_filemark) { in check_tape()
1175 st_printk(KERN_WARNING, STp, in check_tape()
1178 STp->immediate_filemark = 0; in check_tape()
1183 STp->inited = 1; in check_tape()
1185 if (STp->block_size > 0) in check_tape()
1186 (STp->buffer)->buffer_blocks = in check_tape()
1187 (STp->buffer)->buffer_size / STp->block_size; in check_tape()
1189 (STp->buffer)->buffer_blocks = 1; in check_tape()
1190 (STp->buffer)->buffer_bytes = (STp->buffer)->read_pointer = 0; in check_tape()
1192 DEBC_printk(STp, "Block size: %d, buffer size: %d (%d blocks).\n", in check_tape()
1193 STp->block_size, (STp->buffer)->buffer_size, in check_tape()
1194 (STp->buffer)->buffer_blocks); in check_tape()
1196 if (STp->drv_write_prot) { in check_tape()
1197 STp->write_prot = 1; in check_tape()
1199 DEBC_printk(STp, "Write protected\n"); in check_tape()
1209 if (STp->can_partitions && STp->nbr_partitions < 1) { in check_tape()
1213 DEBC_printk(STp, "Updating partition number in status.\n"); in check_tape()
1214 if ((STp->partition = find_partition(STp)) < 0) { in check_tape()
1215 retval = STp->partition; in check_tape()
1218 STp->new_partition = STp->partition; in check_tape()
1219 STp->nbr_partitions = 1; /* This guess will be updated when necessary */ in check_tape()
1223 STp->density_changed = STp->blksize_changed = 0; in check_tape()
1224 STp->compression_changed = 0; in check_tape()
1226 (retval = set_mode_densblk(STp, STm)) < 0) in check_tape()
1229 if (STp->default_drvbuffer != 0xff) { in check_tape()
1230 if (st_int_ioctl(STp, MTSETDRVBUFFER, STp->default_drvbuffer)) in check_tape()
1231 st_printk(KERN_WARNING, STp, in check_tape()
1234 STp->default_drvbuffer); in check_tape()
1251 struct scsi_tape *STp; in st_open() local
1262 if (!(STp = scsi_tape_get(dev))) { in st_open()
1266 filp->private_data = STp; in st_open()
1269 if (STp->in_use) { in st_open()
1271 DEBC_printk(STp, "Device already in use.\n"); in st_open()
1272 scsi_tape_put(STp); in st_open()
1276 STp->in_use = 1; in st_open()
1278 STp->rew_at_close = STp->autorew_dev = (iminor(inode) & 0x80) == 0; in st_open()
1280 if (scsi_autopm_get_device(STp->device) < 0) { in st_open()
1285 if (!scsi_block_when_processing_errors(STp->device)) { in st_open()
1291 if (!enlarge_buffer(STp->buffer, PAGE_SIZE)) { in st_open()
1292 st_printk(KERN_WARNING, STp, in st_open()
1298 (STp->buffer)->cleared = 0; in st_open()
1299 (STp->buffer)->writing = 0; in st_open()
1300 (STp->buffer)->syscall_result = 0; in st_open()
1302 STp->write_prot = ((filp->f_flags & O_ACCMODE) == O_RDONLY); in st_open()
1304 STp->dirty = 0; in st_open()
1306 STps = &(STp->ps[i]); in st_open()
1309 STp->try_dio_now = STp->try_dio; in st_open()
1310 STp->recover_count = 0; in st_open()
1311 DEB( STp->nbr_waits = STp->nbr_finished = 0; in st_open()
1312 STp->nbr_requests = STp->nbr_dio = STp->nbr_pages = 0; ) in st_open()
1314 retval = check_tape(STp, filp); in st_open()
1319 if (STp->ready == NO_TAPE) in st_open()
1328 normalize_buffer(STp->buffer); in st_open()
1330 STp->in_use = 0; in st_open()
1333 scsi_autopm_put_device(STp->device); in st_open()
1334 scsi_tape_put(STp); in st_open()
1346 struct scsi_tape *STp = filp->private_data; in st_flush() local
1347 struct st_modedef *STm = &(STp->modes[STp->current_mode]); in st_flush()
1348 struct st_partstat *STps = &(STp->ps[STp->partition]); in st_flush()
1353 if (STps->rw == ST_WRITING && !STp->pos_unknown) { in st_flush()
1354 result = st_flush_write_buffer(STp); in st_flush()
1359 if (STp->can_partitions && in st_flush()
1360 (result2 = switch_partition(STp)) < 0) { in st_flush()
1361 DEBC_printk(STp, "switch_partition at close failed.\n"); in st_flush()
1367 DEBC( if (STp->nbr_requests) in st_flush()
1368 st_printk(KERN_DEBUG, STp, in st_flush()
1370 "pages %d.\n", STp->nbr_requests, STp->nbr_dio, in st_flush()
1371 STp->nbr_pages)); in st_flush()
1373 if (STps->rw == ST_WRITING && !STp->pos_unknown) { in st_flush()
1374 struct st_cmdstatus *cmdstatp = &STp->buffer->cmdstat; in st_flush()
1377 DEBC_printk(STp, "Async write waits %d, finished %d.\n", in st_flush()
1378 STp->nbr_waits, STp->nbr_finished); in st_flush()
1382 if (STp->immediate_filemark) in st_flush()
1384 cmd[4] = 1 + STp->two_fm; in st_flush()
1386 SRpnt = st_do_scsi(NULL, STp, cmd, 0, DMA_NONE, in st_flush()
1387 STp->device->request_queue->rq_timeout, in st_flush()
1390 result = (STp->buffer)->syscall_result; in st_flush()
1394 if (STp->buffer->syscall_result == 0 || in st_flush()
1406 if (STp->two_fm) in st_flush()
1407 cross_eof(STp, 0); in st_flush()
1413 st_printk(KERN_ERR, STp, in st_flush()
1419 DEBC_printk(STp, "Buffer flushed, %d EOF(s) written\n", cmd[4]); in st_flush()
1420 } else if (!STp->rew_at_close) { in st_flush()
1421 STps = &(STp->ps[STp->partition]); in st_flush()
1423 if (STp->can_bsr) in st_flush()
1424 result = flush_buffer(STp, 0); in st_flush()
1426 result = cross_eof(STp, 0); in st_flush()
1436 !(result = cross_eof(STp, 1))) || in st_flush()
1446 if (STp->rew_at_close) { in st_flush()
1447 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()
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()
1978 if (STp->block_size == 0) in read_tape()
1985 if (STp->block_size == 0 && in read_tape()
1987 st_printk(KERN_NOTICE, STp, in read_tape()
1997 } else if (STp->block_size == 0) { in read_tape()
2003 st_printk(KERN_NOTICE, STp, in read_tape()
2008 st_int_ioctl(STp, MTBSR, 1); in read_tape()
2013 STp->block_size; in read_tape()
2014 DEBC_printk(STp, "ILI but " in read_tape()
2021 if (st_int_ioctl(STp, MTBSR, 1)) in read_tape()
2029 if (STp->block_size == 0) in read_tape()
2033 bytes - transfer * STp->block_size; in read_tape()
2034 DEBC_printk(STp, "EOF detected (%d " in read_tape()
2042 if (STp->block_size == 0) in read_tape()
2046 bytes - transfer * STp->block_size; in read_tape()
2048 DEBC_printk(STp, "EOM detected (%d " in read_tape()
2055 DEBC_printk(STp, "Tape error while reading.\n"); in read_tape()
2059 DEBC_printk(STp, "Zero returned for " in read_tape()
2079 if (STp->sili) /* In fixed block mode residual is always zero here */ in read_tape()
2080 STbp->buffer_bytes -= STp->buffer->cmdstat.residual; in read_tape()
2084 if (STp->block_size == 0) in read_tape()
2087 STps->drv_block += STbp->buffer_bytes / STp->block_size; in read_tape()
2102 struct scsi_tape *STp = filp->private_data; in st_read() local
2105 struct st_buffer *STbp = STp->buffer; in st_read()
2107 if (mutex_lock_interruptible(&STp->lock)) in st_read()
2110 retval = rw_checks(STp, filp, count); in st_read()
2114 STm = &(STp->modes[STp->current_mode]); in st_read()
2115 if (STp->block_size != 0 && (count % STp->block_size) != 0) { in st_read()
2120 STp->try_dio_now = 0; /* Direct i/o can't handle split blocks */ in st_read()
2123 STps = &(STp->ps[STp->partition]); in st_read()
2125 retval = flush_buffer(STp, 0); in st_read()
2132 st_printk(ST_DEB_MSG, STp, in st_read()
2137 retval = setup_buffering(STp, buf, count, 1); in st_read()
2173 special = read_tape(STp, count - total, &SRpnt); in st_read()
2184 st_printk(ST_DEB_MSG, STp, in st_read()
2202 if (STp->block_size == 0) in st_read()
2232 release_buffering(STp, 1); in st_read()
2235 mutex_unlock(&STp->lock); in st_read()
2244 static void st_log_options(struct scsi_tape * STp, struct st_modedef * STm) in DEB() argument
2247 st_printk(KERN_INFO, STp, in DEB()
2250 STp->current_mode, STm->do_buffer_writes, in DEB()
2252 st_printk(KERN_INFO, STp, in DEB()
2255 STp->can_bsr, STp->two_fm, STp->fast_mteom, in DEB()
2256 STp->do_auto_lock); in DEB()
2257 st_printk(KERN_INFO, STp, in DEB()
2260 STm->defaults_for_writes, STp->omit_blklims, in DEB()
2261 STp->can_partitions, STp->scsi2_logical); in DEB()
2262 st_printk(KERN_INFO, STp, in DEB()
2265 STm->sysv, STp->immediate, STp->sili, in DEB()
2266 STp->immediate_filemark); in DEB()
2267 st_printk(KERN_INFO, STp, " debugging: %d\n", debugging); in DEB()
2273 static int st_set_options(struct scsi_tape *STp, long options)
2281 STm = &(STp->modes[STp->current_mode]);
2287 memcpy(STm, &(STp->modes[0]), sizeof(struct st_modedef));
2293 DEBC_printk(STp, "Initialized mode %d definition from mode 0\n",
2294 STp->current_mode);
2303 STp->two_fm = (options & MT_ST_TWO_FM) != 0;
2304 STp->fast_mteom = (options & MT_ST_FAST_MTEOM) != 0;
2305 STp->do_auto_lock = (options & MT_ST_AUTO_LOCK) != 0;
2306 STp->can_bsr = (options & MT_ST_CAN_BSR) != 0;
2307 STp->omit_blklims = (options & MT_ST_NO_BLKLIMS) != 0;
2308 if ((STp->device)->scsi_level >= SCSI_2)
2309 STp->can_partitions = (options & MT_ST_CAN_PARTITIONS) != 0;
2310 STp->scsi2_logical = (options & MT_ST_SCSI2LOGICAL) != 0;
2311 STp->immediate = (options & MT_ST_NOWAIT) != 0;
2312 STp->immediate_filemark = (options & MT_ST_NOWAIT_EOF) != 0;
2314 STp->sili = (options & MT_ST_SILI) != 0;
2316 st_log_options(STp, STm); )
2328 STp->two_fm = value;
2330 STp->fast_mteom = value;
2332 STp->do_auto_lock = value;
2334 STp->can_bsr = value;
2336 STp->omit_blklims = value;
2337 if ((STp->device)->scsi_level >= SCSI_2 &&
2339 STp->can_partitions = value;
2341 STp->scsi2_logical = value;
2343 STp->immediate = value;
2345 STp->immediate_filemark = value;
2349 STp->sili = value;
2353 st_log_options(STp, STm); )
2360 DEBC_printk(STp, "Default block size disabled.\n");
2363 DEBC_printk(STp,"Default block size set to "
2365 if (STp->ready == ST_READY) {
2366 STp->blksize_changed = 0;
2367 set_mode_densblk(STp, STm);
2373 STp->long_timeout = (value & ~MT_ST_SET_LONG_TIMEOUT) * HZ;
2374 DEBC_printk(STp, "Long timeout set to %d seconds.\n",
2377 blk_queue_rq_timeout(STp->device->request_queue,
2379 DEBC_printk(STp, "Normal timeout set to %d seconds.\n",
2388 STp->cln_mode = value;
2389 STp->cln_sense_mask = (options >> 8) & 0xff;
2390 STp->cln_sense_value = (options >> 16) & 0xff;
2391 st_printk(KERN_INFO, STp,
2393 value, STp->cln_sense_mask, STp->cln_sense_value);
2400 DEBC_printk(STp,
2404 DEBC_printk(STp, "Density default set to %x\n",
2406 if (STp->ready == ST_READY) {
2407 STp->density_changed = 0;
2408 set_mode_densblk(STp, STm);
2413 STp->default_drvbuffer = 0xff;
2414 DEBC_printk(STp,
2417 STp->default_drvbuffer = value & 7;
2418 DEBC_printk(STp,
2420 STp->default_drvbuffer);
2421 if (STp->ready == ST_READY)
2422 st_int_ioctl(STp, MTSETDRVBUFFER, STp->default_drvbuffer);
2427 DEBC_printk(STp,
2431 STp->c_algo = (value & 0xff00) >> 8;
2432 DEBC_printk(STp, "Compression "
2434 STp->c_algo);
2438 DEBC_printk(STp, "Compression default "
2441 if (STp->ready == ST_READY) {
2442 STp->compression_changed = 0;
2443 st_compression(STp, (STm->default_compression == ST_YES));
2476 static int read_mode_page(struct scsi_tape *STp, int page, int omit_block_descs) in read_mode_page() argument
2488 SRpnt = st_do_scsi(NULL, STp, cmd, cmd[4], DMA_FROM_DEVICE, in read_mode_page()
2489 STp->device->request_queue->rq_timeout, 0, 1); in read_mode_page()
2491 return (STp->buffer)->syscall_result; in read_mode_page()
2495 return STp->buffer->syscall_result; in read_mode_page()
2501 static int write_mode_page(struct scsi_tape *STp, int page, int slow) in write_mode_page() argument
2511 pgo = MODE_HEADER_LENGTH + (STp->buffer)->b_data[MH_OFF_BDESCS_LENGTH]; in write_mode_page()
2512 cmd[4] = pgo + (STp->buffer)->b_data[pgo + MP_OFF_PAGE_LENGTH] + 2; in write_mode_page()
2515 (STp->buffer)->b_data[MH_OFF_DATA_LENGTH] = 0; in write_mode_page()
2516 (STp->buffer)->b_data[MH_OFF_MEDIUM_TYPE] = 0; in write_mode_page()
2517 (STp->buffer)->b_data[MH_OFF_DEV_SPECIFIC] &= ~MH_BIT_WP; in write_mode_page()
2518 (STp->buffer)->b_data[pgo + MP_OFF_PAGE_NBR] &= MP_MSK_PAGE_NBR; in write_mode_page()
2521 STp->long_timeout : STp->device->request_queue->rq_timeout; in write_mode_page()
2522 SRpnt = st_do_scsi(NULL, STp, cmd, cmd[4], DMA_TO_DEVICE, in write_mode_page()
2525 return (STp->buffer)->syscall_result; in write_mode_page()
2529 return STp->buffer->syscall_result; in write_mode_page()
2550 static int st_compression(struct scsi_tape * STp, int state) in st_compression() argument
2554 unsigned char *b_data = (STp->buffer)->b_data; in st_compression()
2556 if (STp->ready != ST_READY) in st_compression()
2560 retval = read_mode_page(STp, COMPRESSION_PAGE, 0); in st_compression()
2562 DEBC_printk(STp, "Compression mode page not supported.\n"); in st_compression()
2567 DEBC_printk(STp, "Compression state is %d.\n", in st_compression()
2572 DEBC_printk(STp, "Compression not supported.\n"); in st_compression()
2579 if (STp->c_algo != 0) in st_compression()
2580 b_data[mpoffs + CP_OFF_C_ALGO] = STp->c_algo; in st_compression()
2584 if (STp->c_algo != 0) in st_compression()
2588 retval = write_mode_page(STp, COMPRESSION_PAGE, 0); in st_compression()
2590 DEBC_printk(STp, "Compression change failed.\n"); in st_compression()
2593 DEBC_printk(STp, "Compression state changed to %d.\n", state); in st_compression()
2595 STp->compression_changed = 1; in st_compression()
2601 static int do_load_unload(struct scsi_tape *STp, struct file *filp, int load_code) in do_load_unload() argument
2608 if (STp->ready != ST_READY && !load_code) { in do_load_unload()
2609 if (STp->ready == ST_NO_TAPE) in do_load_unload()
2624 DEBC_printk(STp, " Enhanced %sload slot %2d.\n", in do_load_unload()
2629 if (STp->immediate) { in do_load_unload()
2631 timeout = STp->device->request_queue->rq_timeout; in do_load_unload()
2634 timeout = STp->long_timeout; in do_load_unload()
2638 st_printk(ST_DEB_MSG, STp, "Unloading tape.\n"); in do_load_unload()
2640 st_printk(ST_DEB_MSG, STp, "Loading tape.\n"); in do_load_unload()
2643 SRpnt = st_do_scsi(NULL, STp, cmd, 0, DMA_NONE, in do_load_unload()
2646 return (STp->buffer)->syscall_result; in do_load_unload()
2648 retval = (STp->buffer)->syscall_result; in do_load_unload()
2654 STp->rew_at_close = 0; in do_load_unload()
2655 STp->ready = ST_NO_TAPE; in do_load_unload()
2658 STp->rew_at_close = STp->autorew_dev; in do_load_unload()
2659 retval = check_tape(STp, filp); in do_load_unload()
2665 STps = &(STp->ps[STp->partition]); in do_load_unload()
2675 static void deb_space_print(struct scsi_tape *STp, int direction, char *units, unsigned char *cmd) in deb_space_print() argument
2685 st_printk(ST_DEB_MSG, STp, "Spacing tape %s over %d %s.\n", in deb_space_print()
2691 static void deb_space_print(struct scsi_tape *STp, int direction, char *units, unsigned char *cmd) … in deb_space_print() argument
2696 static int st_int_ioctl(struct scsi_tape *STp, unsigned int cmd_in, unsigned long arg) in st_int_ioctl() argument
2708 WARN_ON(STp->buffer->do_dio != 0); in st_int_ioctl()
2709 if (STp->ready != ST_READY) { in st_int_ioctl()
2710 if (STp->ready == ST_NO_TAPE) in st_int_ioctl()
2715 timeout = STp->long_timeout; in st_int_ioctl()
2716 STps = &(STp->ps[STp->partition]); in st_int_ioctl()
2732 deb_space_print(STp, ST_DEB_FORWARD, "filemarks", cmd); in st_int_ioctl()
2748 deb_space_print(STp, ST_DEB_BACKWARD, "filemarks", cmd); in st_int_ioctl()
2760 deb_space_print(STp, ST_DEB_FORWARD, "blocks", cmd); in st_int_ioctl()
2772 deb_space_print(STp, ST_DEB_BACKWARD, "blocks", cmd); in st_int_ioctl()
2783 deb_space_print(STp, ST_DEB_FORWARD, "setmarks", cmd); in st_int_ioctl()
2796 deb_space_print(STp, ST_DEB_BACKWARD, "setmarks", cmd); in st_int_ioctl()
2805 if (STp->write_prot) in st_int_ioctl()
2811 (cmd_in == MTWEOF && STp->immediate_filemark)) in st_int_ioctl()
2816 timeout = STp->device->request_queue->rq_timeout; in st_int_ioctl()
2819 st_printk(ST_DEB_MSG, STp, in st_int_ioctl()
2825 st_printk(ST_DEB_MSG, STp, in st_int_ioctl()
2838 if (STp->immediate) { in st_int_ioctl()
2840 timeout = STp->device->request_queue->rq_timeout; in st_int_ioctl()
2842 DEBC_printk(STp, "Rewinding tape.\n"); in st_int_ioctl()
2846 DEBC_printk(STp, "No op on tape.\n"); in st_int_ioctl()
2850 if (STp->immediate) { in st_int_ioctl()
2852 timeout = STp->device->request_queue->rq_timeout; in st_int_ioctl()
2855 DEBC_printk(STp, "Retensioning tape.\n"); in st_int_ioctl()
2859 if (!STp->fast_mteom) { in st_int_ioctl()
2861 ioctl_result = st_int_ioctl(STp, MTFSF, 0x7fffff); in st_int_ioctl()
2873 DEBC_printk(STp, "Spacing to end of recorded medium.\n"); in st_int_ioctl()
2878 if (STp->write_prot) in st_int_ioctl()
2882 if (STp->immediate) { in st_int_ioctl()
2884 timeout = STp->device->request_queue->rq_timeout; in st_int_ioctl()
2887 timeout = STp->long_timeout * 8; in st_int_ioctl()
2889 DEBC_printk(STp, "Erasing tape.\n"); in st_int_ioctl()
2897 if (STp->dirty || (STp->buffer)->buffer_bytes != 0) in st_int_ioctl()
2901 STp->max_block > 0 && in st_int_ioctl()
2902 ((arg & MT_ST_BLKSIZE_MASK) < STp->min_block || in st_int_ioctl()
2903 (arg & MT_ST_BLKSIZE_MASK) > STp->max_block)) { in st_int_ioctl()
2904 st_printk(KERN_WARNING, STp, "Illegal block size.\n"); in st_int_ioctl()
2908 if ((STp->use_pf & USE_PF)) in st_int_ioctl()
2913 memset((STp->buffer)->b_data, 0, 12); in st_int_ioctl()
2915 (STp->buffer)->b_data[2] = (arg & 7) << 4; in st_int_ioctl()
2917 (STp->buffer)->b_data[2] = in st_int_ioctl()
2918 STp->drv_buffer << 4; in st_int_ioctl()
2919 (STp->buffer)->b_data[3] = 8; /* block descriptor length */ in st_int_ioctl()
2921 (STp->buffer)->b_data[4] = arg; in st_int_ioctl()
2922 STp->density_changed = 1; /* At least we tried ;-) */ in st_int_ioctl()
2924 (STp->buffer)->b_data[4] = arg >> 24; in st_int_ioctl()
2926 (STp->buffer)->b_data[4] = STp->density; in st_int_ioctl()
2930 STp->blksize_changed = 1; /* At least we tried ;-) */ in st_int_ioctl()
2932 ltmp = STp->block_size; in st_int_ioctl()
2933 (STp->buffer)->b_data[9] = (ltmp >> 16); in st_int_ioctl()
2934 (STp->buffer)->b_data[10] = (ltmp >> 8); in st_int_ioctl()
2935 (STp->buffer)->b_data[11] = ltmp; in st_int_ioctl()
2936 timeout = STp->device->request_queue->rq_timeout; in st_int_ioctl()
2939 st_printk(ST_DEB_MSG, STp, in st_int_ioctl()
2941 (STp->buffer)->b_data[9] * 65536 + in st_int_ioctl()
2942 (STp->buffer)->b_data[10] * 256 + in st_int_ioctl()
2943 (STp->buffer)->b_data[11]); in st_int_ioctl()
2945 st_printk(ST_DEB_MSG, STp, in st_int_ioctl()
2947 (STp->buffer)->b_data[4]); in st_int_ioctl()
2949 st_printk(ST_DEB_MSG, STp, in st_int_ioctl()
2951 ((STp->buffer)->b_data[2] >> 4) & 7); in st_int_ioctl()
2958 SRpnt = st_do_scsi(NULL, STp, cmd, datalen, direction, in st_int_ioctl()
2961 return (STp->buffer)->syscall_result; in st_int_ioctl()
2963 ioctl_result = (STp->buffer)->syscall_result; in st_int_ioctl()
2973 ioctl_result = st_int_ioctl(STp, MTFSF, 1); in st_int_ioctl()
2975 ioctl_result = st_int_ioctl(STp, MTBSF, 1); in st_int_ioctl()
2978 STp->block_size = arg & MT_ST_BLKSIZE_MASK; in st_int_ioctl()
2979 if (STp->block_size != 0) { in st_int_ioctl()
2980 (STp->buffer)->buffer_blocks = in st_int_ioctl()
2981 (STp->buffer)->buffer_size / STp->block_size; in st_int_ioctl()
2983 (STp->buffer)->buffer_bytes = (STp->buffer)->read_pointer = 0; in st_int_ioctl()
2985 STp->density = arg >> MT_ST_DENSITY_SHIFT; in st_int_ioctl()
2987 STp->drv_buffer = (arg & 7); in st_int_ioctl()
2989 STp->density = arg; in st_int_ioctl()
3002 struct st_cmdstatus *cmdstatp = &STp->buffer->cmdstat; in st_int_ioctl()
3077 !(STp->use_pf & PF_TESTED)) { in st_int_ioctl()
3080 STp->use_pf = (STp->use_pf ^ USE_PF) | PF_TESTED; in st_int_ioctl()
3083 return st_int_ioctl(STp, cmd_in, arg); in st_int_ioctl()
3102 static int get_location(struct scsi_tape *STp, unsigned int *block, int *partition, in get_location() argument
3109 if (STp->ready != ST_READY) in get_location()
3113 if ((STp->device)->scsi_level < SCSI_2) { in get_location()
3118 if (!logical && !STp->scsi2_logical) in get_location()
3121 SRpnt = st_do_scsi(NULL, STp, scmd, 20, DMA_FROM_DEVICE, in get_location()
3122 STp->device->request_queue->rq_timeout, in get_location()
3125 return (STp->buffer)->syscall_result; in get_location()
3127 if ((STp->buffer)->syscall_result != 0 || in get_location()
3128 (STp->device->scsi_level >= SCSI_2 && in get_location()
3129 ((STp->buffer)->b_data[0] & 4) != 0)) { in get_location()
3131 DEBC_printk(STp, " Can't read tape position.\n"); in get_location()
3135 if ((STp->device)->scsi_level < SCSI_2) { in get_location()
3136 *block = ((STp->buffer)->b_data[0] << 16) in get_location()
3137 + ((STp->buffer)->b_data[1] << 8) in get_location()
3138 + (STp->buffer)->b_data[2]; in get_location()
3141 *block = ((STp->buffer)->b_data[4] << 24) in get_location()
3142 + ((STp->buffer)->b_data[5] << 16) in get_location()
3143 + ((STp->buffer)->b_data[6] << 8) in get_location()
3144 + (STp->buffer)->b_data[7]; in get_location()
3145 *partition = (STp->buffer)->b_data[1]; in get_location()
3146 if (((STp->buffer)->b_data[0] & 0x80) && in get_location()
3147 (STp->buffer)->b_data[1] == 0) /* BOP of partition 0 */ in get_location()
3148 STp->ps[0].drv_block = STp->ps[0].drv_file = 0; in get_location()
3150 DEBC_printk(STp, "Got tape pos. blk %d part %d.\n", in get_location()
3162 static int set_location(struct scsi_tape *STp, unsigned int block, int partition, in set_location() argument
3172 if (STp->ready != ST_READY) in set_location()
3174 timeout = STp->long_timeout; in set_location()
3175 STps = &(STp->ps[STp->partition]); in set_location()
3177 DEBC_printk(STp, "Setting block to %d and partition to %d.\n", in set_location()
3183 if ((!STp->can_partitions && partition != 0) || in set_location()
3186 if (partition != STp->partition) { in set_location()
3187 if (get_location(STp, &blk, &p, 1)) in set_location()
3192 DEBC_printk(STp, "Visited block %d for " in set_location()
3194 blk, STp->partition); in set_location()
3199 if ((STp->device)->scsi_level < SCSI_2) { in set_location()
3211 if (!logical && !STp->scsi2_logical) in set_location()
3213 if (STp->partition != partition) { in set_location()
3216 DEBC_printk(STp, "Trying to change partition " in set_location()
3217 "from %d to %d\n", STp->partition, in set_location()
3221 if (STp->immediate) { in set_location()
3223 timeout = STp->device->request_queue->rq_timeout; in set_location()
3226 SRpnt = st_do_scsi(NULL, STp, scmd, 0, DMA_NONE, in set_location()
3229 return (STp->buffer)->syscall_result; in set_location()
3233 if ((STp->buffer)->syscall_result != 0) { in set_location()
3235 if (STp->can_partitions && in set_location()
3236 (STp->device)->scsi_level >= SCSI_2 && in set_location()
3237 (p = find_partition(STp)) >= 0) in set_location()
3238 STp->partition = p; in set_location()
3240 if (STp->can_partitions) { in set_location()
3241 STp->partition = partition; in set_location()
3242 STps = &(STp->ps[partition]); in set_location()
3264 static int find_partition(struct scsi_tape *STp) in find_partition() argument
3269 if ((i = get_location(STp, &block, &partition, 1)) < 0) in find_partition()
3278 static int switch_partition(struct scsi_tape *STp) in switch_partition() argument
3282 if (STp->partition == STp->new_partition) in switch_partition()
3284 STps = &(STp->ps[STp->new_partition]); in switch_partition()
3287 return set_location(STp, STps->last_block_visited, STp->new_partition, 1); in switch_partition()
3309 static int nbr_partitions(struct scsi_tape *STp) in nbr_partitions() argument
3313 if (STp->ready != ST_READY) in nbr_partitions()
3316 result = read_mode_page(STp, PART_PAGE, 1); in nbr_partitions()
3319 DEBC_printk(STp, "Can't read medium partition page.\n"); in nbr_partitions()
3322 result = (STp->buffer)->b_data[MODE_HEADER_LENGTH + in nbr_partitions()
3324 DEBC_printk(STp, "Number of partitions %d.\n", result); in nbr_partitions()
3331 static int format_medium(struct scsi_tape *STp, int format) in format_medium() argument
3334 int timeout = STp->long_timeout; in format_medium()
3341 if (STp->immediate) { in format_medium()
3343 timeout = STp->device->request_queue->rq_timeout; in format_medium()
3345 DEBC_printk(STp, "Sending FORMAT MEDIUM\n"); in format_medium()
3346 SRpnt = st_do_scsi(NULL, STp, scmd, 0, DMA_NONE, in format_medium()
3349 result = STp->buffer->syscall_result; in format_medium()
3375 static int partition_tape(struct scsi_tape *STp, int size) in partition_tape() argument
3379 bool scsi3 = STp->device->scsi_level >= SCSI_3, needs_format = false; in partition_tape()
3384 result = read_mode_page(STp, PART_PAGE, 0); in partition_tape()
3386 DEBC_printk(STp, "Can't read partition mode page.\n"); in partition_tape()
3396 bp = (STp->buffer)->b_data; in partition_tape()
3398 DEBC_printk(STp, "Partition page length is %d bytes.\n", in partition_tape()
3409 DEBC_printk(STp, "Formatting tape with one partition.\n"); in partition_tape()
3410 result = format_medium(STp, 0); in partition_tape()
3452 DEBC_printk(STp, "psd_cnt %d, max.parts %d, nbr_parts %d\n", in partition_tape()
3460 DEBC_printk(STp, "Formatting tape with one partition.\n"); in partition_tape()
3469 DEBC_printk(STp, in partition_tape()
3484 result = write_mode_page(STp, PART_PAGE, 1); in partition_tape()
3487 result = format_medium(STp, 1); in partition_tape()
3490 st_printk(KERN_INFO, STp, "Partitioning of tape failed.\n"); in partition_tape()
3507 struct scsi_tape *STp = file->private_data; in st_ioctl() local
3511 if (mutex_lock_interruptible(&STp->lock)) in st_ioctl()
3515 if (debugging && !STp->in_use) { in st_ioctl()
3516 st_printk(ST_DEB_MSG, STp, "Incorrect device.\n"); in st_ioctl()
3521 STm = &(STp->modes[STp->current_mode]); in st_ioctl()
3522 STps = &(STp->ps[STp->partition]); in st_ioctl()
3530 retval = scsi_ioctl_block_when_processing_errors(STp->device, cmd_in, in st_ioctl()
3553 st_printk(KERN_WARNING, STp, in st_ioctl()
3565 if (!STp->pos_unknown) { in st_ioctl()
3583 i = !STp->can_partitions || in st_ioctl()
3584 (STp->new_partition != STp->partition); in st_ioctl()
3593 i = flush_buffer(STp, i); in st_ioctl()
3602 i = st_int_ioctl(STp, MTWEOF, 1); in st_ioctl()
3627 reset_state(STp); in st_ioctl()
3629 STp->device->was_reset = 0; in st_ioctl()
3637 if (mtc.mt_op == MTOFFL && STp->door_locked != ST_UNLOCKED) in st_ioctl()
3638 do_door_lock(STp, 0); /* Ignore result! */ in st_ioctl()
3642 retval = st_set_options(STp, mtc.mt_count); in st_ioctl()
3647 if (!STp->can_partitions || in st_ioctl()
3652 if (mtc.mt_count >= STp->nbr_partitions && in st_ioctl()
3653 (STp->nbr_partitions = nbr_partitions(STp)) < 0) { in st_ioctl()
3657 if (mtc.mt_count >= STp->nbr_partitions) { in st_ioctl()
3661 STp->new_partition = mtc.mt_count; in st_ioctl()
3667 if (!STp->can_partitions) { in st_ioctl()
3671 i = do_load_unload(STp, file, 1); in st_ioctl()
3676 i = partition_tape(STp, mtc.mt_count); in st_ioctl()
3682 STp->ps[i].rw = ST_IDLE; in st_ioctl()
3683 STp->ps[i].at_sm = 0; in st_ioctl()
3684 STp->ps[i].last_block_valid = 0; in st_ioctl()
3686 STp->partition = STp->new_partition = 0; in st_ioctl()
3687 STp->nbr_partitions = mtc.mt_count != 0 ? 2 : 1; in st_ioctl()
3694 i = set_location(STp, mtc.mt_count, STp->new_partition, 0); in st_ioctl()
3695 if (!STp->can_partitions) in st_ioctl()
3696 STp->ps[0].rw = ST_IDLE; in st_ioctl()
3702 retval = do_load_unload(STp, file, 0); in st_ioctl()
3707 retval = do_load_unload(STp, file, max(1, mtc.mt_count)); in st_ioctl()
3712 retval = do_door_lock(STp, (mtc.mt_op == MTLOCK)); in st_ioctl()
3716 if (STp->can_partitions && STp->ready == ST_READY && in st_ioctl()
3717 (i = switch_partition(STp)) < 0) { in st_ioctl()
3723 retval = st_compression(STp, (mtc.mt_count & 1)); in st_ioctl()
3725 retval = st_int_ioctl(STp, mtc.mt_op, mtc.mt_count); in st_ioctl()
3733 if ((i = flush_buffer(STp, 0)) < 0) { in st_ioctl()
3737 if (STp->can_partitions && in st_ioctl()
3738 (i = switch_partition(STp)) < 0) { in st_ioctl()
3751 mt_status.mt_type = STp->tape_type; in st_ioctl()
3753 ((STp->block_size << MT_ST_BLKSIZE_SHIFT) & MT_ST_BLKSIZE_MASK) | in st_ioctl()
3754 ((STp->density << MT_ST_DENSITY_SHIFT) & MT_ST_DENSITY_MASK); in st_ioctl()
3757 if (STp->block_size != 0) { in st_ioctl()
3760 (STp->buffer)->buffer_bytes / STp->block_size; in st_ioctl()
3763 ((STp->buffer)->buffer_bytes + in st_ioctl()
3764 STp->block_size - 1) / STp->block_size; in st_ioctl()
3768 if (STp->drv_write_prot) in st_ioctl()
3776 mt_status.mt_erreg = (STp->recover_reg << MT_ST_SOFTERR_SHIFT); in st_ioctl()
3777 mt_status.mt_resid = STp->partition; in st_ioctl()
3782 if (STp->density == 1) in st_ioctl()
3784 else if (STp->density == 2) in st_ioctl()
3786 else if (STp->density == 3) in st_ioctl()
3788 if (STp->ready == ST_READY) in st_ioctl()
3790 if (STp->ready == ST_NO_TAPE) in st_ioctl()
3795 (STm->do_buffer_writes && STp->block_size != 0) || in st_ioctl()
3796 STp->drv_buffer != 0) in st_ioctl()
3798 if (STp->cleaning_req) in st_ioctl()
3805 STp->recover_reg = 0; /* Clear after read */ in st_ioctl()
3814 if ((i = get_location(STp, &blk, &bt, 0)) < 0) { in st_ioctl()
3822 mutex_unlock(&STp->lock); in st_ioctl()
3835 retval = scsi_ioctl(STp->device, file->f_mode, cmd_in, p); in st_ioctl()
3838 STp->rew_at_close = 0; in st_ioctl()
3839 STp->ready = ST_NO_TAPE; in st_ioctl()
3844 mutex_unlock(&STp->lock); in st_ioctl()
4619 struct scsi_tape *STp = STm->tape; in options_show() local
4627 options |= STp->two_fm ? MT_ST_TWO_FM : 0; in options_show()
4628 options |= STp->fast_mteom ? MT_ST_FAST_MTEOM : 0; in options_show()
4630 options |= STp->can_bsr ? MT_ST_CAN_BSR : 0; in options_show()
4631 options |= STp->omit_blklims ? MT_ST_NO_BLKLIMS : 0; in options_show()
4632 options |= STp->can_partitions ? MT_ST_CAN_PARTITIONS : 0; in options_show()
4633 options |= STp->scsi2_logical ? MT_ST_SCSI2LOGICAL : 0; in options_show()
4635 options |= STp->immediate ? MT_ST_NOWAIT : 0; in options_show()
4636 options |= STp->immediate_filemark ? MT_ST_NOWAIT_EOF : 0; in options_show()
4637 options |= STp->sili ? MT_ST_SILI : 0; in options_show()