include/linux/bsg.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _LINUX_BSG_H
   3 #define _LINUX_BSG_H
   4
   5 #include <uapi/linux/bsg.h>
   6
   7 struct request;
   8
   9 #ifdef CONFIG_BLK_DEV_BSG
  10 struct bsg_ops {
  11         int     (*check_proto)(struct sg_io_v4 *hdr);
  12         int     (*fill_hdr)(struct request *rq, struct sg_io_v4 *hdr,
  13                                 fmode_t mode);
  14         int     (*complete_rq)(struct request *rq, struct sg_io_v4 *hdr);
  15         void    (*free_rq)(struct request *rq);
  16 };
  17
  18 struct bsg_class_device {
  19         struct device *class_dev;
  20         int minor;
  21         struct request_queue *queue;
  22         const struct bsg_ops *ops;
  23 };
  24
  25 int bsg_register_queue(struct request_queue *q, struct device *parent,
  26                 const char *name, const struct bsg_ops *ops);
  27 int bsg_scsi_register_queue(struct request_queue *q, struct device *parent);
  28 void bsg_unregister_queue(struct request_queue *q);
  29 #else
  30 static inline int bsg_scsi_register_queue(struct request_queue *q,
  31                 struct device *parent)
  32 {
  33         return 0;
  34 }
  35 static inline void bsg_unregister_queue(struct request_queue *q)
  36 {
  37 }
  38 #endif /* CONFIG_BLK_DEV_BSG */
  39 #endif /* _LINUX_BSG_H */