LCOV - code coverage report
Current view: top level - lkbce/include/linux - bsg.h (source / functions) Hit Total Coverage
Test: coverage.info Lines: 2 2 100.0 %
Date: 2017-01-25 Functions: 0 0 -

          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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