Merge branch 'misc' of master.kernel.org:/pub/scm/linux/kernel/git/galak/powerpc...

[pandora-kernel.git] / include / linux / blkdev.h

diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index fb09853..59e1259 100644 (file)
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -17,11 +17,14 @@
 
 #include <asm/scatterlist.h>
 
+struct scsi_ioctl_command;
+
 struct request_queue;
 typedef struct request_queue request_queue_t;
 struct elevator_queue;
 typedef struct elevator_queue elevator_t;
 struct request_pm_state;
+struct blk_trace;
 
 #define BLKDEV_MIN_RQ  4
 #define BLKDEV_MAX_RQ  128     /* Default maximum */
@@ -54,23 +57,29 @@ struct as_io_context {
 
 struct cfq_queue;
 struct cfq_io_context {
-       /*
-        * circular list of cfq_io_contexts belonging to a process io context
-        */
-       struct list_head list;
-       struct cfq_queue *cfqq;
+       struct rb_node rb_node;
        void *key;
 
+       struct cfq_queue *cfqq[2];
+
        struct io_context *ioc;
 
        unsigned long last_end_request;
-       unsigned long last_queue;
+       sector_t last_request_pos;
+       unsigned long last_queue;
+
        unsigned long ttime_total;
        unsigned long ttime_samples;
        unsigned long ttime_mean;
 
-       void (*dtor)(struct cfq_io_context *);
-       void (*exit)(struct cfq_io_context *);
+       unsigned int seek_samples;
+       u64 seek_total;
+       sector_t seek_mean;
+
+       struct list_head queue_list;
+
+       void (*dtor)(struct io_context *); /* destructor */
+       void (*exit)(struct io_context *); /* called on task exit */
 };
 
 /*
@@ -91,7 +100,7 @@ struct io_context {
        int nr_batch_requests;     /* Number of requests left in the batch */
 
        struct as_io_context *aic;
-       struct cfq_io_context *cic;
+       struct rb_root cic_root;
 };
 
 void put_io_context(struct io_context *ioc);
@@ -118,9 +127,9 @@ struct request_list {
  * try to put the fields that are referenced together in the same cacheline
  */
 struct request {
-       struct list_head queuelist; /* looking for ->queue? you must _not_
-                                    * access it directly, use
-                                    * blkdev_dequeue_request! */
+       struct list_head queuelist;
+       struct list_head donelist;
+
        unsigned long flags;            /* see REQ_ bits below */
 
        /* Maintain bio traversal state for part by part I/O submission.
@@ -141,6 +150,7 @@ struct request {
        struct bio *biotail;
 
        void *elevator_private;
+       void *completion_data;
 
        unsigned short ioprio;
 
@@ -291,6 +301,7 @@ typedef int (merge_bvec_fn) (request_queue_t *, struct bio *, struct bio_vec *);
 typedef void (activity_fn) (void *data, int rw);
 typedef int (issue_flush_fn) (request_queue_t *, struct gendisk *, sector_t *);
 typedef void (prepare_flush_fn) (request_queue_t *, struct request *);
+typedef void (softirq_done_fn)(struct request *);
 
 enum blk_queue_state {
        Queue_down,
@@ -332,6 +343,7 @@ struct request_queue
        activity_fn             *activity_fn;
        issue_flush_fn          *issue_flush_fn;
        prepare_flush_fn        *prepare_flush_fn;
+       softirq_done_fn         *softirq_done_fn;
 
        /*
         * Dispatch queue sorting
@@ -389,8 +401,8 @@ struct request_queue
        unsigned int            nr_congestion_off;
        unsigned int            nr_batching;
 
-       unsigned short          max_sectors;
-       unsigned short          max_hw_sectors;
+       unsigned int            max_sectors;
+       unsigned int            max_hw_sectors;
        unsigned short          max_phys_segments;
        unsigned short          max_hw_segments;
        unsigned short          hardsect_size;
@@ -401,8 +413,6 @@ struct request_queue
 
        struct blk_queue_tag    *queue_tags;
 
-       atomic_t                refcnt;
-
        unsigned int            nr_sorted;
        unsigned int            in_flight;
 
@@ -413,6 +423,8 @@ struct request_queue
        unsigned int            sg_reserved_size;
        int                     node;
 
+       struct blk_trace        *blk_trace;
+
        /*
         * reserved for flush operations
         */
@@ -421,6 +433,8 @@ struct request_queue
        struct request          pre_flush_rq, bar_rq, post_flush_rq;
        struct request          *orig_bar_rq;
        unsigned int            bi_size;
+
+       struct mutex            sysfs_lock;
 };
 
 #define RQ_INACTIVE            (-1)
@@ -592,7 +606,6 @@ extern void generic_make_request(struct bio *bio);
 extern void blk_put_request(struct request *);
 extern void __blk_put_request(request_queue_t *, struct request *);
 extern void blk_end_sync_rq(struct request *rq, int error);
-extern void blk_attempt_remerge(request_queue_t *, struct request *);
 extern struct request *blk_get_request(request_queue_t *, int, gfp_t);
 extern void blk_insert_request(request_queue_t *, struct request *, int, void *);
 extern void blk_requeue_request(request_queue_t *, struct request *);
@@ -600,6 +613,8 @@ extern void blk_plug_device(request_queue_t *);
 extern int blk_remove_plug(request_queue_t *);
 extern void blk_recount_segments(request_queue_t *, struct bio *);
 extern int scsi_cmd_ioctl(struct file *, struct gendisk *, unsigned int, void __user *);
+extern int sg_scsi_ioctl(struct file *, struct request_queue *,
+               struct gendisk *, struct scsi_ioctl_command __user *);
 extern void blk_start_queue(request_queue_t *q);
 extern void blk_stop_queue(request_queue_t *q);
 extern void blk_sync_queue(struct request_queue *q);
@@ -646,6 +661,17 @@ 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 blk_complete_request(struct request *);
+
+static inline int rq_all_done(struct request *rq, unsigned int nr_bytes)
+{
+       if (blk_fs_request(rq))
+               return (nr_bytes >= (rq->hard_nr_sectors << 9));
+       else if (blk_pc_request(rq))
+               return nr_bytes >= rq->data_len;
+
+       return 0;
+}
 
 /*
  * end_that_request_first/chunk() takes an uptodate argument. we account
@@ -684,7 +710,7 @@ extern request_queue_t *blk_init_queue(request_fn_proc *, spinlock_t *);
 extern void blk_cleanup_queue(request_queue_t *);
 extern void blk_queue_make_request(request_queue_t *, make_request_fn *);
 extern void blk_queue_bounce_limit(request_queue_t *, u64);
-extern void blk_queue_max_sectors(request_queue_t *, unsigned short);
+extern void blk_queue_max_sectors(request_queue_t *, unsigned int);
 extern void blk_queue_max_phys_segments(request_queue_t *, unsigned short);
 extern void blk_queue_max_hw_segments(request_queue_t *, unsigned short);
 extern void blk_queue_max_segment_size(request_queue_t *, unsigned int);
@@ -694,6 +720,7 @@ extern void blk_queue_segment_boundary(request_queue_t *, unsigned long);
 extern void blk_queue_prep_rq(request_queue_t *, prep_rq_fn *pfn);
 extern void blk_queue_merge_bvec(request_queue_t *, merge_bvec_fn *);
 extern void blk_queue_dma_alignment(request_queue_t *, int);
+extern void blk_queue_softirq_done(request_queue_t *, softirq_done_fn *);
 extern struct backing_dev_info *blk_get_backing_dev_info(struct block_device *bdev);
 extern int blk_queue_ordered(request_queue_t *, unsigned, prepare_flush_fn *);
 extern void blk_queue_issue_flush_fn(request_queue_t *, issue_flush_fn *);
@@ -711,7 +738,7 @@ extern long nr_blockdev_pages(void);
 int blk_get_queue(request_queue_t *);
 request_queue_t *blk_alloc_queue(gfp_t);
 request_queue_t *blk_alloc_queue_node(gfp_t, int);
-#define blk_put_queue(q) blk_cleanup_queue((q))
+extern void blk_put_queue(request_queue_t *);
 
 /*
  * tag stuff