diff options
Diffstat (limited to 'drivers/mtd/ubi/ubi.h')
| -rw-r--r-- | drivers/mtd/ubi/ubi.h | 85 |
1 files changed, 79 insertions, 6 deletions
diff --git a/drivers/mtd/ubi/ubi.h b/drivers/mtd/ubi/ubi.h index c5be82d9d345..c998212fc680 100644 --- a/drivers/mtd/ubi/ubi.h +++ b/drivers/mtd/ubi/ubi.h @@ -151,6 +151,17 @@ enum { UBI_BAD_FASTMAP, }; +/* + * Flags for emulate_power_cut in ubi_debug_info + * + * POWER_CUT_EC_WRITE: Emulate a power cut when writing an EC header + * POWER_CUT_VID_WRITE: Emulate a power cut when writing a VID header + */ +enum { + POWER_CUT_EC_WRITE = 0x01, + POWER_CUT_VID_WRITE = 0x02, +}; + /** * struct ubi_wl_entry - wear-leveling entry. * @u.rb: link in the corresponding (free/used) RB-tree @@ -356,30 +367,48 @@ struct ubi_wl_entry; * * @chk_gen: if UBI general extra checks are enabled * @chk_io: if UBI I/O extra checks are enabled + * @chk_fastmap: if UBI fastmap extra checks are enabled * @disable_bgt: disable the background task for testing purposes * @emulate_bitflips: emulate bit-flips for testing purposes * @emulate_io_failures: emulate write/erase failures for testing purposes + * @emulate_power_cut: emulate power cut for testing purposes + * @power_cut_counter: count down for writes left until emulated power cut + * @power_cut_min: minimum number of writes before emulating a power cut + * @power_cut_max: maximum number of writes until emulating a power cut * @dfs_dir_name: name of debugfs directory containing files of this UBI device * @dfs_dir: direntry object of the UBI device debugfs directory * @dfs_chk_gen: debugfs knob to enable UBI general extra checks * @dfs_chk_io: debugfs knob to enable UBI I/O extra checks + * @dfs_chk_fastmap: debugfs knob to enable UBI fastmap extra checks * @dfs_disable_bgt: debugfs knob to disable the background task * @dfs_emulate_bitflips: debugfs knob to emulate bit-flips * @dfs_emulate_io_failures: debugfs knob to emulate write/erase failures + * @dfs_emulate_power_cut: debugfs knob to emulate power cuts + * @dfs_power_cut_min: debugfs knob for minimum writes before power cut + * @dfs_power_cut_max: debugfs knob for maximum writes until power cut */ struct ubi_debug_info { unsigned int chk_gen:1; unsigned int chk_io:1; + unsigned int chk_fastmap:1; unsigned int disable_bgt:1; unsigned int emulate_bitflips:1; unsigned int emulate_io_failures:1; + unsigned int emulate_power_cut:2; + unsigned int power_cut_counter; + unsigned int power_cut_min; + unsigned int power_cut_max; char dfs_dir_name[UBI_DFS_DIR_LEN + 1]; struct dentry *dfs_dir; struct dentry *dfs_chk_gen; struct dentry *dfs_chk_io; + struct dentry *dfs_chk_fastmap; struct dentry *dfs_disable_bgt; struct dentry *dfs_emulate_bitflips; struct dentry *dfs_emulate_io_failures; + struct dentry *dfs_emulate_power_cut; + struct dentry *dfs_power_cut_min; + struct dentry *dfs_power_cut_max; }; /** @@ -426,11 +455,13 @@ struct ubi_debug_info { * @fm_pool: in-memory data structure of the fastmap pool * @fm_wl_pool: in-memory data structure of the fastmap pool used by the WL * sub-system - * @fm_mutex: serializes ubi_update_fastmap() and protects @fm_buf + * @fm_protect: serializes ubi_update_fastmap(), protects @fm_buf and makes sure + * that critical sections cannot be interrupted by ubi_update_fastmap() * @fm_buf: vmalloc()'d buffer which holds the raw fastmap * @fm_size: fastmap size in bytes - * @fm_sem: allows ubi_update_fastmap() to block EBA table changes + * @fm_eba_sem: allows ubi_update_fastmap() to block EBA table changes * @fm_work: fastmap work queue + * @fm_work_scheduled: non-zero if fastmap work was scheduled * * @used: RB-tree of used physical eraseblocks * @erroneous: RB-tree of erroneous used physical eraseblocks @@ -442,7 +473,8 @@ struct ubi_debug_info { * @pq_head: protection queue head * @wl_lock: protects the @used, @free, @pq, @pq_head, @lookuptbl, @move_from, * @move_to, @move_to_put @erase_pending, @wl_scheduled, @works, - * @erroneous, and @erroneous_peb_count fields + * @erroneous, @erroneous_peb_count, @fm_work_scheduled, @fm_pool, + * and @fm_wl_pool fields * @move_mutex: serializes eraseblock moves * @work_sem: used to wait for all the scheduled works to finish and prevent * new works from being submitted @@ -479,7 +511,7 @@ struct ubi_debug_info { * @vid_hdr_offset: starting offset of the volume identifier header (might be * unaligned) * @vid_hdr_aloffset: starting offset of the VID header aligned to - * @hdrs_min_io_size + * @hdrs_min_io_size * @vid_hdr_shift: contains @vid_hdr_offset - @vid_hdr_aloffset * @bad_allowed: whether the MTD device admits of bad physical eraseblocks or * not @@ -532,11 +564,12 @@ struct ubi_device { struct ubi_fastmap_layout *fm; struct ubi_fm_pool fm_pool; struct ubi_fm_pool fm_wl_pool; - struct rw_semaphore fm_sem; - struct mutex fm_mutex; + struct rw_semaphore fm_eba_sem; + struct rw_semaphore fm_protect; void *fm_buf; size_t fm_size; struct work_struct fm_work; + int fm_work_scheduled; /* Wear-leveling sub-system's stuff */ struct rb_root used; @@ -868,10 +901,14 @@ int ubi_compare_lebs(struct ubi_device *ubi, const struct ubi_ainf_peb *aeb, int pnum, const struct ubi_vid_hdr *vid_hdr); /* fastmap.c */ +#ifdef CONFIG_MTD_UBI_FASTMAP size_t ubi_calc_fm_size(struct ubi_device *ubi); int ubi_update_fastmap(struct ubi_device *ubi); int ubi_scan_fastmap(struct ubi_device *ubi, struct ubi_attach_info *ai, int fm_anchor); +#else +static inline int ubi_update_fastmap(struct ubi_device *ubi) { return 0; } +#endif /* block.c */ #ifdef CONFIG_MTD_UBI_BLOCK @@ -892,6 +929,42 @@ static inline int ubiblock_remove(struct ubi_volume_info *vi) } #endif +/* + * ubi_for_each_free_peb - walk the UBI free RB tree. + * @ubi: UBI device description object + * @e: a pointer to a ubi_wl_entry to use as cursor + * @pos: a pointer to RB-tree entry type to use as a loop counter + */ +#define ubi_for_each_free_peb(ubi, e, tmp_rb) \ + ubi_rb_for_each_entry((tmp_rb), (e), &(ubi)->free, u.rb) + +/* + * ubi_for_each_used_peb - walk the UBI used RB tree. + * @ubi: UBI device description object + * @e: a pointer to a ubi_wl_entry to use as cursor + * @pos: a pointer to RB-tree entry type to use as a loop counter + */ +#define ubi_for_each_used_peb(ubi, e, tmp_rb) \ + ubi_rb_for_each_entry((tmp_rb), (e), &(ubi)->used, u.rb) + +/* + * ubi_for_each_scub_peb - walk the UBI scub RB tree. + * @ubi: UBI device description object + * @e: a pointer to a ubi_wl_entry to use as cursor + * @pos: a pointer to RB-tree entry type to use as a loop counter + */ +#define ubi_for_each_scrub_peb(ubi, e, tmp_rb) \ + ubi_rb_for_each_entry((tmp_rb), (e), &(ubi)->scrub, u.rb) + +/* + * ubi_for_each_protected_peb - walk the UBI protection queue. + * @ubi: UBI device description object + * @i: a integer used as counter + * @e: a pointer to a ubi_wl_entry to use as cursor + */ +#define ubi_for_each_protected_peb(ubi, i, e) \ + for ((i) = 0; (i) < UBI_PROT_QUEUE_LEN; (i)++) \ + list_for_each_entry((e), &(ubi->pq[(i)]), u.list) /* * ubi_rb_for_each_entry - walk an RB-tree. |