Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1#ifndef BSG_H
2#define BSG_H
3
4#define BSG_PROTOCOL_SCSI 0
5
6#define BSG_SUB_PROTOCOL_SCSI_CMD 0
7#define BSG_SUB_PROTOCOL_SCSI_TMF 1
8#define BSG_SUB_PROTOCOL_SCSI_TRANSPORT 2
9
10struct sg_io_v4 {
11 __s32 guard; /* [i] 'Q' to differentiate from v3 */
12 __u32 protocol; /* [i] 0 -> SCSI , .... */
13 __u32 subprotocol; /* [i] 0 -> SCSI command, 1 -> SCSI task
14 management function, .... */
15
16 __u32 request_len; /* [i] in bytes */
17 __u64 request; /* [i], [*i] {SCSI: cdb} */
18 __u64 request_tag; /* [i] {SCSI: task tag (only if flagged)} */
19 __u32 request_attr; /* [i] {SCSI: task attribute} */
20 __u32 request_priority; /* [i] {SCSI: task priority} */
21 __u32 request_extra; /* [i] {spare, for padding} */
22 __u32 max_response_len; /* [i] in bytes */
23 __u64 response; /* [i], [*o] {SCSI: (auto)sense data} */
24
25 /* "dout_": data out (to device); "din_": data in (from device) */
26 __u32 dout_iovec_count; /* [i] 0 -> "flat" dout transfer else
27 dout_xfer points to array of iovec */
28 __u32 dout_xfer_len; /* [i] bytes to be transferred to device */
29 __u32 din_iovec_count; /* [i] 0 -> "flat" din transfer */
30 __u32 din_xfer_len; /* [i] bytes to be transferred from device */
31 __u64 dout_xferp; /* [i], [*i] */
32 __u64 din_xferp; /* [i], [*o] */
33
34 __u32 timeout; /* [i] units: millisecond */
35 __u32 flags; /* [i] bit mask */
36 __u64 usr_ptr; /* [i->o] unused internally */
37 __u32 spare_in; /* [i] */
38
39 __u32 driver_status; /* [o] 0 -> ok */
40 __u32 transport_status; /* [o] 0 -> ok */
41 __u32 device_status; /* [o] {SCSI: command completion status} */
42 __u32 retry_delay; /* [o] {SCSI: status auxiliary information} */
43 __u32 info; /* [o] additional information */
44 __u32 duration; /* [o] time to complete, in milliseconds */
45 __u32 response_len; /* [o] bytes of response actually written */
46 __s32 din_resid; /* [o] din_xfer_len - actual_din_xfer_len */
47 __s32 dout_resid; /* [o] dout_xfer_len - actual_dout_xfer_len */
48 __u64 generated_tag; /* [o] {SCSI: transport generated task tag} */
49 __u32 spare_out; /* [o] */
50
51 __u32 padding;
52};
53
54#ifdef __KERNEL__
55
56#if defined(CONFIG_BLK_DEV_BSG)
57struct bsg_class_device {
58 struct class_device *class_dev;
59 struct device *dev;
60 int minor;
61 struct request_queue *queue;
62};
63
64extern int bsg_register_queue(struct request_queue *, struct device *, const char *);
65extern void bsg_unregister_queue(struct request_queue *);
66#else
67static inline int bsg_register_queue(struct request_queue * rq, struct device *dev, const char *name)
68{
69 return 0;
70}
71static inline void bsg_unregister_queue(struct request_queue *rq)
72{
73}
74#endif
75
76#endif /* __KERNEL__ */
77
78#endif