Lines Matching +full:out +full:- +full:volume +full:- +full:limit
1 // SPDX-License-Identifier: GPL-2.0-or-later
37 /* Maximum number of comma-separated items in the 'mtd=' parameter */
50 * struct mtd_dev_param - MTD device parameter description data structure.
56 * @enable_fm: enable fastmap when value is non-zero
72 /* UBI module parameter to enable fastmap automatically on non-fastmap images */
77 /* Slab cache for wear-leveling entries */
93 /* Protects @ubi_devices and @ubi->ref_count */
147 * ubi_volume_notify - send a volume change notification.
149 * @vol: volume description object of the changed volume
152 * This is a helper function which notifies all subscribers about a volume
153 * change event (creation, removal, re-sizing, re-naming, updating). Returns
178 * ubi_notify_all - send a notification to all volumes.
184 * notification for each volume. If @nb is %NULL, then all registered notifiers
195 mutex_lock(&ubi->device_mutex); in ubi_notify_all()
196 for (i = 0; i < ubi->vtbl_slots; i++) { in ubi_notify_all()
198 * Since the @ubi->device is locked, and we are not going to in ubi_notify_all()
199 * change @ubi->volumes, we do not have to lock in ubi_notify_all()
200 * @ubi->volumes_lock. in ubi_notify_all()
202 if (!ubi->volumes[i]) in ubi_notify_all()
205 ubi_do_get_volume_info(ubi, ubi->volumes[i], &nt.vi); in ubi_notify_all()
207 nb->notifier_call(nb, ntype, &nt); in ubi_notify_all()
213 mutex_unlock(&ubi->device_mutex); in ubi_notify_all()
219 * ubi_enumerate_volumes - send "add" notification for all existing volumes.
223 * %UBI_VOLUME_ADDED notification for each volume. If @nb is %NULL, then all
247 * ubi_get_device - get UBI device.
262 ubi_assert(ubi->ref_count >= 0); in ubi_get_device()
263 ubi->ref_count += 1; in ubi_get_device()
264 get_device(&ubi->dev); in ubi_get_device()
272 * ubi_put_device - drop an UBI device reference.
278 ubi->ref_count -= 1; in ubi_put_device()
279 put_device(&ubi->dev); in ubi_put_device()
284 * ubi_get_by_major - get UBI device by character device major number.
298 if (ubi && MAJOR(ubi->cdev.dev) == major) { in ubi_get_by_major()
299 ubi_assert(ubi->ref_count >= 0); in ubi_get_by_major()
300 ubi->ref_count += 1; in ubi_get_by_major()
301 get_device(&ubi->dev); in ubi_get_by_major()
312 * ubi_major2num - get UBI device number by character device major number.
316 * device was not found, this function returns -ENODEV, otherwise the UBI device
321 int i, ubi_num = -ENODEV; in ubi_major2num()
327 if (ubi && MAJOR(ubi->cdev.dev) == major) { in ubi_major2num()
328 ubi_num = ubi->ubi_num; in ubi_major2num()
349 * 'ubi_get_device()' will return -ENODEV and we fail. in dev_attribute_show()
352 * we still can use 'ubi->ubi_num'. in dev_attribute_show()
357 ret = sprintf(buf, "%d\n", ubi->leb_size); in dev_attribute_show()
359 ret = sprintf(buf, "%d\n", ubi->avail_pebs); in dev_attribute_show()
361 ret = sprintf(buf, "%d\n", ubi->good_peb_count); in dev_attribute_show()
363 ret = sprintf(buf, "%d\n", ubi->vol_count - UBI_INT_VOL_COUNT); in dev_attribute_show()
365 ret = sprintf(buf, "%d\n", ubi->max_ec); in dev_attribute_show()
367 ret = sprintf(buf, "%d\n", ubi->beb_rsvd_pebs); in dev_attribute_show()
369 ret = sprintf(buf, "%d\n", ubi->bad_peb_count); in dev_attribute_show()
371 ret = sprintf(buf, "%d\n", ubi->vtbl_slots); in dev_attribute_show()
373 ret = sprintf(buf, "%d\n", ubi->min_io_size); in dev_attribute_show()
375 ret = sprintf(buf, "%d\n", ubi->thread_enabled); in dev_attribute_show()
377 ret = sprintf(buf, "%d\n", ubi->mtd->index); in dev_attribute_show()
379 ret = sprintf(buf, "%d\n", ubi->ro_mode); in dev_attribute_show()
381 ret = -EINVAL; in dev_attribute_show()
411 * kill_volumes - destroy all user volumes.
418 for (i = 0; i < ubi->vtbl_slots; i++) in kill_volumes()
419 if (ubi->volumes[i]) in kill_volumes()
420 ubi_free_volume(ubi, ubi->volumes[i]); in kill_volumes()
424 * uif_init - initialize user interfaces for an UBI device.
439 sprintf(ubi->ubi_name, UBI_NAME_STR "%d", ubi->ubi_num); in uif_init()
443 * dynamically. Major numbers of volume character devices are in uif_init()
446 * volume character devices start from 1. Thus, we allocate one major in uif_init()
447 * number and ubi->vtbl_slots + 1 minor numbers. in uif_init()
449 err = alloc_chrdev_region(&dev, 0, ubi->vtbl_slots + 1, ubi->ubi_name); in uif_init()
455 ubi->dev.devt = dev; in uif_init()
458 cdev_init(&ubi->cdev, &ubi_cdev_operations); in uif_init()
459 dbg_gen("%s major is %u", ubi->ubi_name, MAJOR(dev)); in uif_init()
460 ubi->cdev.owner = THIS_MODULE; in uif_init()
462 dev_set_name(&ubi->dev, UBI_NAME_STR "%d", ubi->ubi_num); in uif_init()
463 err = cdev_device_add(&ubi->cdev, &ubi->dev); in uif_init()
467 for (i = 0; i < ubi->vtbl_slots; i++) in uif_init()
468 if (ubi->volumes[i]) { in uif_init()
469 err = ubi_add_volume(ubi, ubi->volumes[i]); in uif_init()
471 ubi_err(ubi, "cannot add volume %d", i); in uif_init()
472 ubi->volumes[i] = NULL; in uif_init()
481 cdev_device_del(&ubi->cdev, &ubi->dev); in uif_init()
483 unregister_chrdev_region(ubi->cdev.dev, ubi->vtbl_slots + 1); in uif_init()
485 ubi->ubi_name, err); in uif_init()
490 * uif_close - close user interfaces for an UBI device.
493 * Note, since this function un-registers UBI volume device objects (@vol->dev),
500 cdev_device_del(&ubi->cdev, &ubi->dev); in uif_close()
501 unregister_chrdev_region(ubi->cdev.dev, ubi->vtbl_slots + 1); in uif_close()
505 * ubi_free_volumes_from - free volumes from specific index.
507 * @from: the start index used for volume free.
513 for (i = from; i < ubi->vtbl_slots + UBI_INT_VOL_COUNT; i++) { in ubi_free_volumes_from()
514 if (!ubi->volumes[i]) in ubi_free_volumes_from()
516 ubi_eba_replace_table(ubi->volumes[i], NULL); in ubi_free_volumes_from()
517 ubi_fastmap_destroy_checkmap(ubi->volumes[i]); in ubi_free_volumes_from()
518 kfree(ubi->volumes[i]); in ubi_free_volumes_from()
519 ubi->volumes[i] = NULL; in ubi_free_volumes_from()
524 * ubi_free_all_volumes - free all volumes.
533 * ubi_free_internal_volumes - free internal volumes.
538 ubi_free_volumes_from(ubi, ubi->vtbl_slots); in ubi_free_internal_volumes()
543 int limit, device_pebs; in get_bad_peb_limit() local
550 * limit if it is supported by the device. in get_bad_peb_limit()
552 limit = mtd_max_bad_blocks(ubi->mtd, 0, ubi->mtd->size); in get_bad_peb_limit()
553 if (limit < 0) in get_bad_peb_limit()
555 return limit; in get_bad_peb_limit()
565 * the MTD partition we are attaching (ubi->mtd). in get_bad_peb_limit()
567 device_size = mtd_get_device_size(ubi->mtd); in get_bad_peb_limit()
568 device_pebs = mtd_div_by_eb(device_size, ubi->mtd); in get_bad_peb_limit()
569 limit = mult_frac(device_pebs, max_beb_per1024, 1024); in get_bad_peb_limit()
572 if (mult_frac(limit, 1024, max_beb_per1024) < device_pebs) in get_bad_peb_limit()
573 limit += 1; in get_bad_peb_limit()
575 return limit; in get_bad_peb_limit()
579 * io_init - initialize I/O sub-system for a given UBI device.
583 * If @ubi->vid_hdr_offset or @ubi->leb_start is zero, default offsets are
585 * o EC header is always at offset zero - this cannot be changed;
587 * aligned to @io->hdrs_min_io_size;
589 * @io->min_io_size
599 if (ubi->mtd->numeraseregions != 0) { in io_init()
603 * characteristics. It looks like mostly multi-region flashes in io_init()
610 return -EINVAL; in io_init()
613 if (ubi->vid_hdr_offset < 0) in io_init()
614 return -EINVAL; in io_init()
621 ubi->peb_size = ubi->mtd->erasesize; in io_init()
622 ubi->peb_count = mtd_div_by_eb(ubi->mtd->size, ubi->mtd); in io_init()
623 ubi->flash_size = ubi->mtd->size; in io_init()
625 if (mtd_can_have_bb(ubi->mtd)) { in io_init()
626 ubi->bad_allowed = 1; in io_init()
627 ubi->bad_peb_limit = get_bad_peb_limit(ubi, max_beb_per1024); in io_init()
630 if (ubi->mtd->type == MTD_NORFLASH) in io_init()
631 ubi->nor_flash = 1; in io_init()
633 ubi->min_io_size = ubi->mtd->writesize; in io_init()
634 ubi->hdrs_min_io_size = ubi->mtd->writesize >> ubi->mtd->subpage_sft; in io_init()
641 if (!is_power_of_2(ubi->min_io_size)) { in io_init()
643 ubi->min_io_size); in io_init()
644 return -EINVAL; in io_init()
647 ubi_assert(ubi->hdrs_min_io_size > 0); in io_init()
648 ubi_assert(ubi->hdrs_min_io_size <= ubi->min_io_size); in io_init()
649 ubi_assert(ubi->min_io_size % ubi->hdrs_min_io_size == 0); in io_init()
651 ubi->max_write_size = ubi->mtd->writebufsize; in io_init()
656 if (ubi->max_write_size < ubi->min_io_size || in io_init()
657 ubi->max_write_size % ubi->min_io_size || in io_init()
658 !is_power_of_2(ubi->max_write_size)) { in io_init()
660 ubi->max_write_size, ubi->min_io_size); in io_init()
661 return -EINVAL; in io_init()
665 ubi->ec_hdr_alsize = ALIGN(UBI_EC_HDR_SIZE, ubi->hdrs_min_io_size); in io_init()
666 ubi->vid_hdr_alsize = ALIGN(UBI_VID_HDR_SIZE, ubi->hdrs_min_io_size); in io_init()
668 dbg_gen("min_io_size %d", ubi->min_io_size); in io_init()
669 dbg_gen("max_write_size %d", ubi->max_write_size); in io_init()
670 dbg_gen("hdrs_min_io_size %d", ubi->hdrs_min_io_size); in io_init()
671 dbg_gen("ec_hdr_alsize %d", ubi->ec_hdr_alsize); in io_init()
672 dbg_gen("vid_hdr_alsize %d", ubi->vid_hdr_alsize); in io_init()
674 if (ubi->vid_hdr_offset == 0) in io_init()
676 ubi->vid_hdr_offset = ubi->vid_hdr_aloffset = in io_init()
677 ubi->ec_hdr_alsize; in io_init()
679 ubi->vid_hdr_aloffset = ubi->vid_hdr_offset & in io_init()
680 ~(ubi->hdrs_min_io_size - 1); in io_init()
681 ubi->vid_hdr_shift = ubi->vid_hdr_offset - in io_init()
682 ubi->vid_hdr_aloffset; in io_init()
686 * Memory allocation for VID header is ubi->vid_hdr_alsize in io_init()
689 * ubi->vid_hdr_alsize, so that all vid header operations in io_init()
690 * won't access memory out of bounds. in io_init()
692 if ((ubi->vid_hdr_shift + UBI_VID_HDR_SIZE) > ubi->vid_hdr_alsize) { in io_init()
695 ubi->vid_hdr_offset, ubi->vid_hdr_shift, in io_init()
696 UBI_VID_HDR_SIZE, ubi->vid_hdr_alsize); in io_init()
697 return -EINVAL; in io_init()
701 ubi->leb_start = ubi->vid_hdr_offset + UBI_VID_HDR_SIZE; in io_init()
702 ubi->leb_start = ALIGN(ubi->leb_start, ubi->min_io_size); in io_init()
704 dbg_gen("vid_hdr_offset %d", ubi->vid_hdr_offset); in io_init()
705 dbg_gen("vid_hdr_aloffset %d", ubi->vid_hdr_aloffset); in io_init()
706 dbg_gen("vid_hdr_shift %d", ubi->vid_hdr_shift); in io_init()
707 dbg_gen("leb_start %d", ubi->leb_start); in io_init()
709 /* The shift must be aligned to 32-bit boundary */ in io_init()
710 if (ubi->vid_hdr_shift % 4) { in io_init()
712 ubi->vid_hdr_shift); in io_init()
713 return -EINVAL; in io_init()
717 if (ubi->vid_hdr_offset < UBI_EC_HDR_SIZE || in io_init()
718 ubi->leb_start < ubi->vid_hdr_offset + UBI_VID_HDR_SIZE || in io_init()
719 ubi->leb_start > ubi->peb_size - UBI_VID_HDR_SIZE || in io_init()
720 ubi->leb_start & (ubi->min_io_size - 1)) { in io_init()
722 ubi->vid_hdr_offset, ubi->leb_start); in io_init()
723 return -EINVAL; in io_init()
730 ubi->max_erroneous = ubi->peb_count / 10; in io_init()
731 if (ubi->max_erroneous < 16) in io_init()
732 ubi->max_erroneous = 16; in io_init()
733 dbg_gen("max_erroneous %d", ubi->max_erroneous); in io_init()
738 * read-only mode. in io_init()
740 if (ubi->vid_hdr_offset + UBI_VID_HDR_SIZE <= ubi->hdrs_min_io_size) { in io_init()
741 ubi_warn(ubi, "EC and VID headers are in the same minimal I/O unit, switch to read-only mode"); in io_init()
742 ubi->ro_mode = 1; in io_init()
745 ubi->leb_size = ubi->peb_size - ubi->leb_start; in io_init()
747 if (!(ubi->mtd->flags & MTD_WRITEABLE)) { in io_init()
748 ubi_msg(ubi, "MTD device %d is write-protected, attach in read-only mode", in io_init()
749 ubi->mtd->index); in io_init()
750 ubi->ro_mode = 1; in io_init()
754 * Note, ideally, we have to initialize @ubi->bad_peb_count here. But in io_init()
756 * over all physical eraseblocks and invoke mtd->block_is_bad() for in io_init()
757 * each physical eraseblock. So, we leave @ubi->bad_peb_count in io_init()
765 * autoresize - re-size the volume which has the "auto-resize" flag set.
767 * @vol_id: ID of the volume to re-size
769 * This function re-sizes the volume marked by the %UBI_VTBL_AUTORESIZE_FLG in
770 * the volume table to the largest possible size. See comments in ubi-header.h
777 struct ubi_volume *vol = ubi->volumes[vol_id]; in autoresize()
778 int err, old_reserved_pebs = vol->reserved_pebs; in autoresize()
780 if (ubi->ro_mode) { in autoresize()
781 ubi_warn(ubi, "skip auto-resize because of R/O mode"); in autoresize()
786 * Clear the auto-resize flag in the volume in-memory copy of the in autoresize()
787 * volume table, and 'ubi_resize_volume()' will propagate this change in autoresize()
790 ubi->vtbl[vol_id].flags &= ~UBI_VTBL_AUTORESIZE_FLG; in autoresize()
792 if (ubi->avail_pebs == 0) { in autoresize()
796 * No available PEBs to re-size the volume, clear the flag on in autoresize()
799 vtbl_rec = ubi->vtbl[vol_id]; in autoresize()
802 ubi_err(ubi, "cannot clean auto-resize flag for volume %d", in autoresize()
807 old_reserved_pebs + ubi->avail_pebs); in autoresize()
809 ubi_err(ubi, "cannot auto-resize volume %d", in autoresize()
816 ubi_msg(ubi, "volume %d (\"%s\") re-sized from %d to %d LEBs", in autoresize()
817 vol_id, vol->name, old_reserved_pebs, vol->reserved_pebs); in autoresize()
822 * ubi_attach_mtd_dev - attach an MTD device.
849 return -EINVAL; in ubi_attach_mtd_dev()
862 if (ubi && mtd->index == ubi->mtd->index) { in ubi_attach_mtd_dev()
864 mtd->index, i); in ubi_attach_mtd_dev()
865 return -EEXIST; in ubi_attach_mtd_dev()
870 * Make sure this MTD device is not emulated on top of an UBI volume in ubi_attach_mtd_dev()
877 if (mtd->type == MTD_UBIVOLUME) { in ubi_attach_mtd_dev()
878 pr_err("ubi: refuse attaching mtd%d - it is already emulated on top of UBI\n", in ubi_attach_mtd_dev()
879 mtd->index); in ubi_attach_mtd_dev()
880 return -EINVAL; in ubi_attach_mtd_dev()
890 if (mtd->type == MTD_MLCNANDFLASH && in ubi_attach_mtd_dev()
891 !(mtd->flags & MTD_SLC_ON_MLC_EMULATION)) { in ubi_attach_mtd_dev()
892 pr_err("ubi: refuse attaching mtd%d - MLC NAND is not supported\n", in ubi_attach_mtd_dev()
893 mtd->index); in ubi_attach_mtd_dev()
894 return -EINVAL; in ubi_attach_mtd_dev()
898 if (!mtd->erasesize) { in ubi_attach_mtd_dev()
899 pr_err("ubi: refuse attaching mtd%d - zero erasesize flash is not supported\n", in ubi_attach_mtd_dev()
900 mtd->index); in ubi_attach_mtd_dev()
901 return -EINVAL; in ubi_attach_mtd_dev()
912 return -ENFILE; in ubi_attach_mtd_dev()
916 return -EINVAL; in ubi_attach_mtd_dev()
921 return -EEXIST; in ubi_attach_mtd_dev()
927 return -ENOMEM; in ubi_attach_mtd_dev()
929 device_initialize(&ubi->dev); in ubi_attach_mtd_dev()
930 ubi->dev.release = dev_release; in ubi_attach_mtd_dev()
931 ubi->dev.class = &ubi_class; in ubi_attach_mtd_dev()
932 ubi->dev.groups = ubi_dev_groups; in ubi_attach_mtd_dev()
933 ubi->dev.parent = &mtd->dev; in ubi_attach_mtd_dev()
935 ubi->mtd = mtd; in ubi_attach_mtd_dev()
936 ubi->ubi_num = ubi_num; in ubi_attach_mtd_dev()
937 ubi->vid_hdr_offset = vid_hdr_offset; in ubi_attach_mtd_dev()
938 ubi->autoresize_vol_id = -1; in ubi_attach_mtd_dev()
941 ubi->fm_pool.used = ubi->fm_pool.size = 0; in ubi_attach_mtd_dev()
942 ubi->fm_wl_pool.used = ubi->fm_wl_pool.size = 0; in ubi_attach_mtd_dev()
948 ubi->fm_pool.max_size = min(((int)mtd_div_by_eb(ubi->mtd->size, in ubi_attach_mtd_dev()
949 ubi->mtd) / 100) * 5, UBI_FM_MAX_POOL_SIZE); in ubi_attach_mtd_dev()
950 ubi->fm_pool.max_size = max(ubi->fm_pool.max_size, in ubi_attach_mtd_dev()
953 ubi->fm_wl_pool.max_size = ubi->fm_pool.max_size / 2; in ubi_attach_mtd_dev()
954 ubi->fm_disabled = (!fm_autoconvert || disable_fm) ? 1 : 0; in ubi_attach_mtd_dev()
958 if (!ubi->fm_disabled && (int)mtd_div_by_eb(ubi->mtd->size, ubi->mtd) in ubi_attach_mtd_dev()
962 ubi->fm_disabled = 1; in ubi_attach_mtd_dev()
965 ubi_msg(ubi, "default fastmap pool size: %d", ubi->fm_pool.max_size); in ubi_attach_mtd_dev()
967 ubi->fm_wl_pool.max_size); in ubi_attach_mtd_dev()
969 ubi->fm_disabled = 1; in ubi_attach_mtd_dev()
971 mutex_init(&ubi->buf_mutex); in ubi_attach_mtd_dev()
972 mutex_init(&ubi->ckvol_mutex); in ubi_attach_mtd_dev()
973 mutex_init(&ubi->device_mutex); in ubi_attach_mtd_dev()
974 spin_lock_init(&ubi->volumes_lock); in ubi_attach_mtd_dev()
975 init_rwsem(&ubi->fm_protect); in ubi_attach_mtd_dev()
976 init_rwsem(&ubi->fm_eba_sem); in ubi_attach_mtd_dev()
978 ubi_msg(ubi, "attaching mtd%d", mtd->index); in ubi_attach_mtd_dev()
984 err = -ENOMEM; in ubi_attach_mtd_dev()
985 ubi->peb_buf = vmalloc(ubi->peb_size); in ubi_attach_mtd_dev()
986 if (!ubi->peb_buf) in ubi_attach_mtd_dev()
990 ubi->fm_size = ubi_calc_fm_size(ubi); in ubi_attach_mtd_dev()
991 ubi->fm_buf = vzalloc(ubi->fm_size); in ubi_attach_mtd_dev()
992 if (!ubi->fm_buf) in ubi_attach_mtd_dev()
998 mtd->index, err); in ubi_attach_mtd_dev()
1002 if (ubi->autoresize_vol_id != -1) { in ubi_attach_mtd_dev()
1003 err = autoresize(ubi, ubi->autoresize_vol_id); in ubi_attach_mtd_dev()
1016 ubi->bgt_thread = kthread_create(ubi_thread, ubi, "%s", ubi->bgt_name); in ubi_attach_mtd_dev()
1017 if (IS_ERR(ubi->bgt_thread)) { in ubi_attach_mtd_dev()
1018 err = PTR_ERR(ubi->bgt_thread); in ubi_attach_mtd_dev()
1020 ubi->bgt_name, err); in ubi_attach_mtd_dev()
1025 mtd->index, mtd->name, ubi->flash_size >> 20); in ubi_attach_mtd_dev()
1027 ubi->peb_size, ubi->peb_size >> 10, ubi->leb_size); in ubi_attach_mtd_dev()
1028 ubi_msg(ubi, "min./max. I/O unit sizes: %d/%d, sub-page size %d", in ubi_attach_mtd_dev()
1029 ubi->min_io_size, ubi->max_write_size, ubi->hdrs_min_io_size); in ubi_attach_mtd_dev()
1031 ubi->vid_hdr_offset, ubi->vid_hdr_aloffset, ubi->leb_start); in ubi_attach_mtd_dev()
1033 ubi->good_peb_count, ubi->bad_peb_count, ubi->corr_peb_count); in ubi_attach_mtd_dev()
1034 ubi_msg(ubi, "user volume: %d, internal volumes: %d, max. volumes count: %d", in ubi_attach_mtd_dev()
1035 ubi->vol_count - UBI_INT_VOL_COUNT, UBI_INT_VOL_COUNT, in ubi_attach_mtd_dev()
1036 ubi->vtbl_slots); in ubi_attach_mtd_dev()
1038 ubi->max_ec, ubi->mean_ec, CONFIG_MTD_UBI_WL_THRESHOLD, in ubi_attach_mtd_dev()
1039 ubi->image_seq); in ubi_attach_mtd_dev()
1041 ubi->avail_pebs, ubi->rsvd_pebs, ubi->beb_rsvd_pebs); in ubi_attach_mtd_dev()
1045 * checks @ubi->thread_enabled. Otherwise we may fail to wake it up. in ubi_attach_mtd_dev()
1047 spin_lock(&ubi->wl_lock); in ubi_attach_mtd_dev()
1048 ubi->thread_enabled = 1; in ubi_attach_mtd_dev()
1049 wake_up_process(ubi->bgt_thread); in ubi_attach_mtd_dev()
1050 spin_unlock(&ubi->wl_lock); in ubi_attach_mtd_dev()
1063 vfree(ubi->vtbl); in ubi_attach_mtd_dev()
1065 vfree(ubi->peb_buf); in ubi_attach_mtd_dev()
1066 vfree(ubi->fm_buf); in ubi_attach_mtd_dev()
1067 put_device(&ubi->dev); in ubi_attach_mtd_dev()
1072 * ubi_detach_mtd_dev - detach an MTD device.
1077 * underlying MTD device. Returns zero in case of success and %-EBUSY if the
1078 * UBI device is busy and cannot be destroyed, and %-EINVAL if it does not
1089 return -EINVAL; in ubi_detach_mtd_dev()
1093 return -EINVAL; in ubi_detach_mtd_dev()
1096 put_device(&ubi->dev); in ubi_detach_mtd_dev()
1097 ubi->ref_count -= 1; in ubi_detach_mtd_dev()
1098 if (ubi->ref_count) { in ubi_detach_mtd_dev()
1101 return -EBUSY; in ubi_detach_mtd_dev()
1105 ubi->ubi_name, ubi->ref_count); in ubi_detach_mtd_dev()
1110 ubi_assert(ubi_num == ubi->ubi_num); in ubi_detach_mtd_dev()
1112 ubi_msg(ubi, "detaching mtd%d", ubi->mtd->index); in ubi_detach_mtd_dev()
1125 if (ubi->bgt_thread) in ubi_detach_mtd_dev()
1126 kthread_stop(ubi->bgt_thread); in ubi_detach_mtd_dev()
1129 cancel_work_sync(&ubi->fm_work); in ubi_detach_mtd_dev()
1136 vfree(ubi->vtbl); in ubi_detach_mtd_dev()
1137 vfree(ubi->peb_buf); in ubi_detach_mtd_dev()
1138 vfree(ubi->fm_buf); in ubi_detach_mtd_dev()
1139 ubi_msg(ubi, "mtd%d is detached", ubi->mtd->index); in ubi_detach_mtd_dev()
1140 put_mtd_device(ubi->mtd); in ubi_detach_mtd_dev()
1141 put_device(&ubi->dev); in ubi_detach_mtd_dev()
1146 * open_mtd_by_chdev - open an MTD device by its character device node path.
1171 return ERR_PTR(-EINVAL); in open_mtd_by_chdev()
1180 return ERR_PTR(-EINVAL); in open_mtd_by_chdev()
1186 * open_mtd_device - open MTD device by name, character device path, or number.
1208 if (PTR_ERR(mtd) == -ENODEV) in open_mtd_device()
1228 return -EINVAL; in ubi_init()
1239 goto out; in ubi_init()
1246 err = -ENOMEM; in ubi_init()
1262 mtd = open_mtd_device(p->name); in ubi_init()
1266 p->name, err); in ubi_init()
1267 /* See comment below re-ubi_is_module(). */ in ubi_init()
1274 err = ubi_attach_mtd_dev(mtd, p->ubi_num, in ubi_init()
1275 p->vid_hdr_offs, p->max_beb_per1024, in ubi_init()
1276 p->enable_fm == 0); in ubi_init()
1280 mtd->index); in ubi_init()
1285 * However, later on it was found out that this in ubi_init()
1292 * non-module case, but preserved the old behavior for in ubi_init()
1305 /* See comment above re-ubi_is_module(). */ in ubi_init()
1316 ubi_detach_mtd_dev(ubi_devices[k]->ubi_num, 1); in ubi_init()
1324 out: in ubi_init()
1340 ubi_detach_mtd_dev(ubi_devices[i]->ubi_num, 1); in ubi_exit()
1351 * bytes_str_to_int - convert a number of bytes string into an integer.
1365 return -EINVAL; in bytes_str_to_int()
1382 return -EINVAL; in bytes_str_to_int()
1389 * ubi_mtd_param_parse - parse the 'mtd=' UBI parameter.
1405 return -EINVAL; in ubi_mtd_param_parse()
1410 return -EINVAL; in ubi_mtd_param_parse()
1417 return -EINVAL; in ubi_mtd_param_parse()
1421 pr_warn("UBI warning: empty 'mtd=' parameter - ignored\n"); in ubi_mtd_param_parse()
1428 if (buf[len - 1] == '\n') in ubi_mtd_param_parse()
1429 buf[len - 1] = '\0'; in ubi_mtd_param_parse()
1436 return -EINVAL; in ubi_mtd_param_parse()
1440 strcpy(&p->name[0], tokens[0]); in ubi_mtd_param_parse()
1444 p->vid_hdr_offs = bytes_str_to_int(token); in ubi_mtd_param_parse()
1446 if (p->vid_hdr_offs < 0) in ubi_mtd_param_parse()
1447 return p->vid_hdr_offs; in ubi_mtd_param_parse()
1452 int err = kstrtoint(token, 10, &p->max_beb_per1024); in ubi_mtd_param_parse()
1457 return -EINVAL; in ubi_mtd_param_parse()
1463 int err = kstrtoint(token, 10, &p->ubi_num); in ubi_mtd_param_parse()
1465 if (err || p->ubi_num < UBI_DEV_NUM_AUTO) { in ubi_mtd_param_parse()
1468 return -EINVAL; in ubi_mtd_param_parse()
1471 p->ubi_num = UBI_DEV_NUM_AUTO; in ubi_mtd_param_parse()
1475 int err = kstrtoint(token, 10, &p->enable_fm); in ubi_mtd_param_parse()
1480 return -EINVAL; in ubi_mtd_param_parse()
1483 p->enable_fm = 0; in ubi_mtd_param_parse()
1497 …eter determines whether to enable fastmap during attach. If the value is non-zero, fastmap is enab…
1499 "Example 1: mtd=/dev/mtd0 - attach MTD device /dev/mtd0.\n"
1500 …"Example 2: mtd=content,1984 mtd=4 - attach MTD device with name \"content\" using VID header offs…
1501 …"Example 3: mtd=/dev/mtd1,0,25 - attach MTD device /dev/mtd1 using default VID header offset and r…
1502 …"Example 4: mtd=/dev/mtd1,0,0,5 - attach MTD device /dev/mtd1 to UBI 5 and using default values fo…
1503 …"example 5: mtd=1,0,0,5 mtd=2,0,0,6,1 - attach MTD device /dev/mtd1 to UBI 5 and disable fastmap; …
1512 MODULE_DESCRIPTION("UBI - Unsorted Block Images");