diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2010-03-01 09:00:29 -0800 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-03-01 09:00:29 -0800 |
commit | b1bf9368407ae7e89d8a005bb40beb70a41df539 (patch) | |
tree | 3815c8aab19c6c186736673c624fef5f3faab716 /include/linux/blkdev.h | |
parent | 524df55725217b13d5a232fb5badb5846418ea0e (diff) | |
parent | 4671a1322052425afa38fcb7980d2fd2bb0fc99b (diff) |
Merge branch 'for-2.6.34' of git://git.kernel.dk/linux-2.6-block
* 'for-2.6.34' of git://git.kernel.dk/linux-2.6-block: (38 commits)
block: don't access jiffies when initialising io_context
cfq: remove 8 bytes of padding from cfq_rb_root on 64 bit builds
block: fix for "Consolidate phys_segment and hw_segment limits"
cfq-iosched: quantum check tweak
blktrace: perform cleanup after setup error
blkdev: fix merge_bvec_fn return value checks
cfq-iosched: requests "in flight" vs "in driver" clarification
cciss: Fix problem with scatter gather elements in the scsi half of the driver
cciss: eliminate unnecessary pointer use in cciss scsi code
cciss: do not use void pointer for scsi hba data
cciss: factor out scatter gather chain block mapping code
cciss: fix scatter gather chain block dma direction kludge
cciss: simplify scatter gather code
cciss: factor out scatter gather chain block allocation and freeing
cciss: detect bad alignment of scsi commands at build time
cciss: clarify command list padding calculation
cfq-iosched: rethink seeky detection for SSDs
cfq-iosched: rework seeky detection
block: remove padding from io_context on 64bit builds
block: Consolidate phys_segment and hw_segment limits
...
Diffstat (limited to 'include/linux/blkdev.h')
-rw-r--r-- | include/linux/blkdev.h | 65 |
1 files changed, 38 insertions, 27 deletions
diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h index 1896e868854..ebd22dbed86 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -316,8 +316,7 @@ struct queue_limits { unsigned int discard_alignment; unsigned short logical_block_size; - unsigned short max_hw_segments; - unsigned short max_phys_segments; + unsigned short max_segments; unsigned char misaligned; unsigned char discard_misaligned; @@ -462,6 +461,7 @@ struct request_queue #define QUEUE_FLAG_VIRT QUEUE_FLAG_NONROT /* paravirt device */ #define QUEUE_FLAG_IO_STAT 15 /* do IO stats */ #define QUEUE_FLAG_DISCARD 16 /* supports DISCARD */ +#define QUEUE_FLAG_NOXMERGES 17 /* No extended merges */ #define QUEUE_FLAG_DEFAULT ((1 << QUEUE_FLAG_IO_STAT) | \ (1 << QUEUE_FLAG_CLUSTER) | \ @@ -587,6 +587,8 @@ enum { #define blk_queue_tagged(q) test_bit(QUEUE_FLAG_QUEUED, &(q)->queue_flags) #define blk_queue_stopped(q) test_bit(QUEUE_FLAG_STOPPED, &(q)->queue_flags) #define blk_queue_nomerges(q) test_bit(QUEUE_FLAG_NOMERGES, &(q)->queue_flags) +#define blk_queue_noxmerges(q) \ + test_bit(QUEUE_FLAG_NOXMERGES, &(q)->queue_flags) #define blk_queue_nonrot(q) test_bit(QUEUE_FLAG_NONROT, &(q)->queue_flags) #define blk_queue_io_stat(q) test_bit(QUEUE_FLAG_IO_STAT, &(q)->queue_flags) #define blk_queue_flushing(q) ((q)->ordseq) @@ -918,10 +920,27 @@ extern struct request_queue *blk_init_queue(request_fn_proc *, spinlock_t *); extern void blk_cleanup_queue(struct request_queue *); extern void blk_queue_make_request(struct request_queue *, make_request_fn *); extern void blk_queue_bounce_limit(struct request_queue *, u64); -extern void blk_queue_max_sectors(struct request_queue *, unsigned int); extern void blk_queue_max_hw_sectors(struct request_queue *, unsigned int); -extern void blk_queue_max_phys_segments(struct request_queue *, unsigned short); -extern void blk_queue_max_hw_segments(struct request_queue *, unsigned short); + +/* Temporary compatibility wrapper */ +static inline void blk_queue_max_sectors(struct request_queue *q, unsigned int max) +{ + blk_queue_max_hw_sectors(q, max); +} + +extern void blk_queue_max_segments(struct request_queue *, unsigned short); + +static inline void blk_queue_max_phys_segments(struct request_queue *q, unsigned short max) +{ + blk_queue_max_segments(q, max); +} + +static inline void blk_queue_max_hw_segments(struct request_queue *q, unsigned short max) +{ + blk_queue_max_segments(q, max); +} + + extern void blk_queue_max_segment_size(struct request_queue *, unsigned int); extern void blk_queue_max_discard_sectors(struct request_queue *q, unsigned int max_discard_sectors); @@ -1014,11 +1033,15 @@ extern int blk_verify_command(unsigned char *cmd, fmode_t has_write_perm); #define MAX_PHYS_SEGMENTS 128 #define MAX_HW_SEGMENTS 128 #define SAFE_MAX_SECTORS 255 -#define BLK_DEF_MAX_SECTORS 1024 - #define MAX_SEGMENT_SIZE 65536 -#define BLK_SEG_BOUNDARY_MASK 0xFFFFFFFFUL +enum blk_default_limits { + BLK_MAX_SEGMENTS = 128, + BLK_SAFE_MAX_SECTORS = 255, + BLK_DEF_MAX_SECTORS = 1024, + BLK_MAX_SEGMENT_SIZE = 65536, + BLK_SEG_BOUNDARY_MASK = 0xFFFFFFFFUL, +}; #define blkdev_entry_to_request(entry) list_entry((entry), struct request, queuelist) @@ -1042,14 +1065,9 @@ static inline unsigned int queue_max_hw_sectors(struct request_queue *q) return q->limits.max_hw_sectors; } -static inline unsigned short queue_max_hw_segments(struct request_queue *q) -{ - return q->limits.max_hw_segments; -} - -static inline unsigned short queue_max_phys_segments(struct request_queue *q) +static inline unsigned short queue_max_segments(struct request_queue *q) { - return q->limits.max_phys_segments; + return q->limits.max_segments; } static inline unsigned int queue_max_segment_size(struct request_queue *q) @@ -1110,18 +1128,13 @@ static inline int queue_alignment_offset(struct request_queue *q) return q->limits.alignment_offset; } -static inline int queue_limit_alignment_offset(struct queue_limits *lim, sector_t offset) +static inline int queue_limit_alignment_offset(struct queue_limits *lim, sector_t sector) { unsigned int granularity = max(lim->physical_block_size, lim->io_min); + unsigned int alignment = (sector << 9) & (granularity - 1); - offset &= granularity - 1; - return (granularity + lim->alignment_offset - offset) & (granularity - 1); -} - -static inline int queue_sector_alignment_offset(struct request_queue *q, - sector_t sector) -{ - return queue_limit_alignment_offset(&q->limits, sector << 9); + return (granularity + lim->alignment_offset - alignment) + & (granularity - 1); } static inline int bdev_alignment_offset(struct block_device *bdev) @@ -1145,10 +1158,8 @@ static inline int queue_discard_alignment(struct request_queue *q) return q->limits.discard_alignment; } -static inline int queue_sector_discard_alignment(struct request_queue *q, - sector_t sector) +static inline int queue_limit_discard_alignment(struct queue_limits *lim, sector_t sector) { - struct queue_limits *lim = &q->limits; unsigned int alignment = (sector << 9) & (lim->discard_granularity - 1); return (lim->discard_granularity + lim->discard_alignment - alignment) |