block: add queue flag for SSD/non-rotational devices

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

diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index e34999d14c16d9df9f663a6e48a3d2a754522165..0cf3e619fb21ec65e2a046e98e2ef4a6e2f6512a 100644 (file)
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -441,6 +441,8 @@ struct request_queue
 #define QUEUE_FLAG_NOMERGES    10      /* disable merge attempts */
 #define QUEUE_FLAG_SAME_COMP   11      /* force complete on same CPU */
 #define QUEUE_FLAG_FAIL_IO     12      /* fake timeout */
+#define QUEUE_FLAG_STACKABLE   13      /* supports request stacking */
+#define QUEUE_FLAG_NONROT      14      /* non-rotational device (SSD) */
 
 static inline int queue_is_locked(struct request_queue *q)
 {
@@ -546,7 +548,10 @@ 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_nonrot(q)    test_bit(QUEUE_FLAG_NONROT, &(q)->queue_flags)
 #define blk_queue_flushing(q)  ((q)->ordseq)
+#define blk_queue_stackable(q) \
+       test_bit(QUEUE_FLAG_STACKABLE, &(q)->queue_flags)
 
 #define blk_fs_request(rq)     ((rq)->cmd_type == REQ_TYPE_FS)
 #define blk_pc_request(rq)     ((rq)->cmd_type == REQ_TYPE_BLOCK_PC)
@@ -693,6 +698,9 @@ extern void __blk_put_request(struct request_queue *, struct request *);
 extern struct request *blk_get_request(struct request_queue *, int, gfp_t);
 extern void blk_insert_request(struct request_queue *, struct request *, int, void *);
 extern void blk_requeue_request(struct request_queue *, struct request *);
+extern int blk_rq_check_limits(struct request_queue *q, struct request *rq);
+extern int blk_insert_cloned_request(struct request_queue *q,
+                                    struct request *rq);
 extern void blk_plug_device(struct request_queue *);
 extern void blk_plug_device_unlocked(struct request_queue *);
 extern int blk_remove_plug(struct request_queue *);
@@ -791,6 +799,8 @@ extern void blk_complete_request(struct request *);
 extern void __blk_complete_request(struct request *);
 extern void blk_abort_request(struct request *);
 extern void blk_abort_queue(struct request_queue *);
+extern void blk_update_request(struct request *rq, int error,
+                              unsigned int nr_bytes);
 
 /*
  * blk_end_request() takes bytes instead of sectors as a complete size.
@@ -1004,47 +1014,6 @@ extern int blk_integrity_compare(struct block_device *, struct block_device *);
 extern int blk_rq_map_integrity_sg(struct request *, struct scatterlist *);
 extern int blk_rq_count_integrity_sg(struct request *);
 
-static inline unsigned short blk_integrity_tuple_size(struct blk_integrity *bi)
-{
-       if (bi)
-               return bi->tuple_size;
-
-       return 0;
-}
-
-static inline struct blk_integrity *bdev_get_integrity(struct block_device *bdev)
-{
-       return bdev->bd_disk->integrity;
-}
-
-static inline unsigned int bdev_get_tag_size(struct block_device *bdev)
-{
-       struct blk_integrity *bi = bdev_get_integrity(bdev);
-
-       if (bi)
-               return bi->tag_size;
-
-       return 0;
-}
-
-static inline int bdev_integrity_enabled(struct block_device *bdev, int rw)
-{
-       struct blk_integrity *bi = bdev_get_integrity(bdev);
-
-       if (bi == NULL)
-               return 0;
-
-       if (rw == READ && bi->verify_fn != NULL &&
-           (bi->flags & INTEGRITY_FLAG_READ))
-               return 1;
-
-       if (rw == WRITE && bi->generate_fn != NULL &&
-           (bi->flags & INTEGRITY_FLAG_WRITE))
-               return 1;
-
-       return 0;
-}
-
 static inline int blk_integrity_rq(struct request *rq)
 {
        if (rq->bio == NULL)
@@ -1058,8 +1027,6 @@ static inline int blk_integrity_rq(struct request *rq)
 #define blk_integrity_rq(rq)                   (0)
 #define blk_rq_count_integrity_sg(a)           (0)
 #define blk_rq_map_integrity_sg(a, b)          (0)
-#define bdev_get_integrity(a)                  (0)
-#define bdev_get_tag_size(a)                   (0)
 #define blk_integrity_compare(a, b)            (0)
 #define blk_integrity_register(a, b)           (0)
 #define blk_integrity_unregister(a)            do { } while (0);