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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 | ||
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 | #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 |