Line data Source code
1 : #ifndef BSG_H
2 : #define BSG_H
3 :
4 : #include <linux/types.h>
5 :
6 : #define BSG_PROTOCOL_SCSI 0
7 :
8 : #define BSG_SUB_PROTOCOL_SCSI_CMD 0
9 : #define BSG_SUB_PROTOCOL_SCSI_TMF 1
10 : #define BSG_SUB_PROTOCOL_SCSI_TRANSPORT 2
11 :
12 : /*
13 : * For flags member below
14 : * sg.h sg_io_hdr also has bits defined for it's flags member. However
15 : * none of these bits are implemented/used by bsg. The bits below are
16 : * allocated to not conflict with sg.h ones anyway.
17 : */
18 : #define BSG_FLAG_Q_AT_TAIL 0x10 /* default, == 0 at this bit, is Q_AT_HEAD */
19 :
20 : struct sg_io_v4 {
21 : __s32 guard; /* [i] 'Q' to differentiate from v3 */
22 : __u32 protocol; /* [i] 0 -> SCSI , .... */
23 : __u32 subprotocol; /* [i] 0 -> SCSI command, 1 -> SCSI task
24 : management function, .... */
25 :
26 : __u32 request_len; /* [i] in bytes */
27 : __u64 request; /* [i], [*i] {SCSI: cdb} */
28 : __u64 request_tag; /* [i] {SCSI: task tag (only if flagged)} */
29 : __u32 request_attr; /* [i] {SCSI: task attribute} */
30 : __u32 request_priority; /* [i] {SCSI: task priority} */
31 : __u32 request_extra; /* [i] {spare, for padding} */
32 : __u32 max_response_len; /* [i] in bytes */
33 : __u64 response; /* [i], [*o] {SCSI: (auto)sense data} */
34 :
35 : /* "dout_": data out (to device); "din_": data in (from device) */
36 : __u32 dout_iovec_count; /* [i] 0 -> "flat" dout transfer else
37 : dout_xfer points to array of iovec */
38 : __u32 dout_xfer_len; /* [i] bytes to be transferred to device */
39 : __u32 din_iovec_count; /* [i] 0 -> "flat" din transfer */
40 : __u32 din_xfer_len; /* [i] bytes to be transferred from device */
41 : __u64 dout_xferp; /* [i], [*i] */
42 : __u64 din_xferp; /* [i], [*o] */
43 :
44 : __u32 timeout; /* [i] units: millisecond */
45 : __u32 flags; /* [i] bit mask */
46 : __u64 usr_ptr; /* [i->o] unused internally */
47 : __u32 spare_in; /* [i] */
48 :
49 : __u32 driver_status; /* [o] 0 -> ok */
50 : __u32 transport_status; /* [o] 0 -> ok */
51 : __u32 device_status; /* [o] {SCSI: command completion status} */
52 : __u32 retry_delay; /* [o] {SCSI: status auxiliary information} */
53 : __u32 info; /* [o] additional information */
54 : __u32 duration; /* [o] time to complete, in milliseconds */
55 : __u32 response_len; /* [o] bytes of response actually written */
56 : __s32 din_resid; /* [o] din_xfer_len - actual_din_xfer_len */
57 : __s32 dout_resid; /* [o] dout_xfer_len - actual_dout_xfer_len */
58 : __u64 generated_tag; /* [o] {SCSI: transport generated task tag} */
59 : __u32 spare_out; /* [o] */
60 :
61 : __u32 padding;
62 : };
63 1 :
64 : #ifdef __KERNEL__
65 :
66 : #if defined(CONFIG_BLK_DEV_BSG)
67 : struct bsg_class_device {
68 : struct device *class_dev;
69 : struct device *parent;
70 : int minor;
71 : struct request_queue *queue;
72 : struct kref ref;
73 : void (*release)(struct device *);
74 : };
75 :
76 : extern int bsg_register_queue(struct request_queue *q,
77 : struct device *parent, const char *name,
78 : void (*release)(struct device *));
79 : extern void bsg_unregister_queue(struct request_queue *);
80 1 : #else
81 : static inline int bsg_register_queue(struct request_queue *q,
82 : struct device *parent, const char *name,
83 : void (*release)(struct device *))
84 : {
85 : return 0;
86 : }
87 : static inline void bsg_unregister_queue(struct request_queue *q)
88 : {
89 : }
90 : #endif
91 :
92 : #endif /* __KERNEL__ */
93 :
94 : #endif
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