Merge branch 'for-4.5/nvme' of git://git.kernel.dk/linux-block

[cascardo/linux.git] / include / linux / blkdev.h

diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h
index c70e358..29189ae 100644 (file)
--- a/include/linux/blkdev.h
+++ b/include/linux/blkdev.h
@@ -15,6 +15,7 @@
 #include <linux/backing-dev-defs.h>
 #include <linux/wait.h>
 #include <linux/mempool.h>
+#include <linux/pfn.h>
 #include <linux/bio.h>
 #include <linux/stringify.h>
 #include <linux/gfp.h>
@@ -408,6 +409,7 @@ struct request_queue {
 
        unsigned int            rq_timeout;
        struct timer_list       timeout;
+       struct work_struct      timeout_work;
        struct list_head        timeout_list;
 
        struct list_head        icq_list;
@@ -794,7 +796,7 @@ extern int scsi_cmd_ioctl(struct request_queue *, struct gendisk *, fmode_t,
 extern int sg_scsi_ioctl(struct request_queue *, struct gendisk *, fmode_t,
                         struct scsi_ioctl_command __user *);
 
-extern int blk_queue_enter(struct request_queue *q, gfp_t gfp);
+extern int blk_queue_enter(struct request_queue *q, bool nowait);
 extern void blk_queue_exit(struct request_queue *q);
 extern void blk_start_queue(struct request_queue *q);
 extern void blk_start_queue_async(struct request_queue *q);
@@ -1617,6 +1619,20 @@ static inline bool integrity_req_gap_front_merge(struct request *req,
 
 #endif /* CONFIG_BLK_DEV_INTEGRITY */
 
+/**
+ * struct blk_dax_ctl - control and output parameters for ->direct_access
+ * @sector: (input) offset relative to a block_device
+ * @addr: (output) kernel virtual address for @sector populated by driver
+ * @pfn: (output) page frame number for @addr populated by driver
+ * @size: (input) number of bytes requested
+ */
+struct blk_dax_ctl {
+       sector_t sector;
+       void __pmem *addr;
+       long size;
+       pfn_t pfn;
+};
+
 struct block_device_operations {
        int (*open) (struct block_device *, fmode_t);
        void (*release) (struct gendisk *, fmode_t);
@@ -1624,7 +1640,7 @@ struct block_device_operations {
        int (*ioctl) (struct block_device *, fmode_t, unsigned, unsigned long);
        int (*compat_ioctl) (struct block_device *, fmode_t, unsigned, unsigned long);
        long (*direct_access)(struct block_device *, sector_t, void __pmem **,
-                       unsigned long *pfn);
+                       pfn_t *);
        unsigned int (*check_events) (struct gendisk *disk,
                                      unsigned int clearing);
        /* ->media_changed() is DEPRECATED, use ->check_events() instead */
@@ -1643,8 +1659,7 @@ extern int __blkdev_driver_ioctl(struct block_device *, fmode_t, unsigned int,
 extern int bdev_read_page(struct block_device *, sector_t, struct page *);
 extern int bdev_write_page(struct block_device *, sector_t, struct page *,
                                                struct writeback_control *);
-extern long bdev_direct_access(struct block_device *, sector_t,
-               void __pmem **addr, unsigned long *pfn, long size);
+extern long bdev_direct_access(struct block_device *, struct blk_dax_ctl *);
 #else /* CONFIG_BLOCK */
 
 struct block_device;