Merge git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6

[linux-2.6-omap-h63xx.git] / include / linux / blkdev.h

diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index b126c6f68e27b2080fe434fe15847a00058048fe..d18ee67b40f8198118e93336aee272324d9c30db 100644 (file)
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -1,6 +1,8 @@
 #ifndef _LINUX_BLKDEV_H
 #define _LINUX_BLKDEV_H
 
+#ifdef CONFIG_BLOCK
+
 #include <linux/sched.h>
 #include <linux/major.h>
 #include <linux/genhd.h>
@@ -18,22 +20,6 @@
 
 #include <asm/scatterlist.h>
 
-#ifdef CONFIG_LBD
-# include <asm/div64.h>
-# define sector_div(a, b) do_div(a, b)
-#else
-# define sector_div(n, b)( \
-{ \
-       int _res; \
-       _res = (n) % (b); \
-       (n) /= (b); \
-       _res; \
-} \
-)
-#endif
-
-#ifdef CONFIG_BLOCK
-
 struct scsi_ioctl_command;
 
 struct request_queue;
@@ -344,7 +330,6 @@ typedef void (unplug_fn) (struct request_queue *);
 
 struct bio_vec;
 typedef int (merge_bvec_fn) (struct request_queue *, struct bio *, struct bio_vec *);
-typedef int (issue_flush_fn) (struct request_queue *, struct gendisk *, sector_t *);
 typedef void (prepare_flush_fn) (struct request_queue *, struct request *);
 typedef void (softirq_done_fn)(struct request *);
 
@@ -356,7 +341,6 @@ enum blk_queue_state {
 struct blk_queue_tag {
        struct request **tag_index;     /* map of busy tags */
        unsigned long *tag_map;         /* bit map of free/busy tags */
-       struct list_head busy_list;     /* fifo list of busy tags */
        int busy;                       /* current depth */
        int max_depth;                  /* what we will send to device */
        int real_max_depth;             /* what the array can hold */
@@ -382,7 +366,6 @@ struct request_queue
        prep_rq_fn              *prep_rq_fn;
        unplug_fn               *unplug_fn;
        merge_bvec_fn           *merge_bvec_fn;
-       issue_flush_fn          *issue_flush_fn;
        prepare_flush_fn        *prepare_flush_fn;
        softirq_done_fn         *softirq_done_fn;
 
@@ -451,6 +434,7 @@ struct request_queue
        unsigned int            dma_alignment;
 
        struct blk_queue_tag    *queue_tags;
+       struct list_head        tag_busy_list;
 
        unsigned int            nr_sorted;
        unsigned int            in_flight;
@@ -471,7 +455,6 @@ struct request_queue
        int                     orderr, ordcolor;
        struct request          pre_flush_rq, bar_rq, post_flush_rq;
        struct request          *orig_bar_rq;
-       unsigned int            bi_size;
 
        struct mutex            sysfs_lock;
 
@@ -555,6 +538,7 @@ enum {
 #define blk_barrier_rq(rq)     ((rq)->cmd_flags & REQ_HARDBARRIER)
 #define blk_fua_rq(rq)         ((rq)->cmd_flags & REQ_FUA)
 #define blk_bidi_rq(rq)                ((rq)->next_rq != NULL)
+#define blk_empty_barrier(rq)  (blk_barrier_rq(rq) && blk_fs_request(rq) && !(rq)->hard_nr_sectors)
 
 #define list_entry_rq(ptr)     list_entry((ptr), struct request, queuelist)
 
@@ -637,10 +621,23 @@ static inline void blk_queue_bounce(struct request_queue *q, struct bio **bio)
 }
 #endif /* CONFIG_MMU */
 
-#define rq_for_each_bio(_bio, rq)      \
+struct req_iterator {
+       int i;
+       struct bio *bio;
+};
+
+/* This should not be used directly - use rq_for_each_segment */
+#define __rq_for_each_bio(_bio, rq)    \
        if ((rq->bio))                  \
                for (_bio = (rq)->bio; _bio; _bio = _bio->bi_next)
 
+#define rq_for_each_segment(bvl, _rq, _iter)                   \
+       __rq_for_each_bio(_iter.bio, _rq)                       \
+               bio_for_each_segment(bvl, _iter.bio, _iter.i)
+
+#define rq_iter_last(rq, _iter)                                        \
+               (_iter.bio->bi_next == NULL && _iter.i == _iter.bio->bi_vcnt-1)
+
 extern int blk_register_queue(struct gendisk *disk);
 extern void blk_unregister_queue(struct gendisk *disk);
 extern void register_disk(struct gendisk *dev);
@@ -662,8 +659,8 @@ extern int sg_scsi_ioctl(struct file *, struct request_queue *,
 /*
  * Temporary export, until SCSI gets fixed up.
  */
-extern int ll_back_merge_fn(struct request_queue *, struct request *,
-               struct bio *);
+extern int blk_rq_append_bio(struct request_queue *q, struct request *rq,
+                            struct bio *bio);
 
 /*
  * A queue has just exitted congestion.  Note this in the global counter of
@@ -700,6 +697,7 @@ extern int blk_execute_rq(struct request_queue *, struct gendisk *,
 extern void blk_execute_rq_nowait(struct request_queue *, struct gendisk *,
                                  struct request *, int, rq_end_io_fn *);
 extern int blk_verify_command(unsigned char *, int);
+extern void blk_unplug(struct request_queue *q);
 
 static inline struct request_queue *bdev_get_queue(struct block_device *bdev)
 {
@@ -731,7 +729,9 @@ static inline void blk_run_address_space(struct address_space *mapping)
 extern int end_that_request_first(struct request *, int, int);
 extern int end_that_request_chunk(struct request *, int, int);
 extern void end_that_request_last(struct request *, int);
-extern void end_request(struct request *req, int uptodate);
+extern void end_request(struct request *, int);
+extern void end_queued_request(struct request *, int);
+extern void end_dequeued_request(struct request *, int);
 extern void blk_complete_request(struct request *);
 
 /*
@@ -769,7 +769,6 @@ extern void blk_queue_dma_alignment(struct request_queue *, int);
 extern void blk_queue_softirq_done(struct request_queue *, softirq_done_fn *);
 extern struct backing_dev_info *blk_get_backing_dev_info(struct block_device *bdev);
 extern int blk_queue_ordered(struct request_queue *, unsigned, prepare_flush_fn *);
-extern void blk_queue_issue_flush_fn(struct request_queue *, issue_flush_fn *);
 extern int blk_do_ordered(struct request_queue *, struct request **);
 extern unsigned blk_ordered_cur_seq(struct request_queue *);
 extern unsigned blk_ordered_req_seq(struct request *);
@@ -810,7 +809,6 @@ static inline struct request *blk_map_queue_find_tag(struct blk_queue_tag *bqt,
        return bqt->tag_index[tag];
 }
 
-extern void blk_rq_bio_prep(struct request_queue *, struct request *, struct bio *);
 extern int blkdev_issue_flush(struct block_device *, sector_t *);
 
 #define MAX_PHYS_SEGMENTS 128