#ifndef BSG_H
#define BSG_H
+#include <linux/types.h>
+
+#define BSG_PROTOCOL_SCSI 0
+
+#define BSG_SUB_PROTOCOL_SCSI_CMD 0
+#define BSG_SUB_PROTOCOL_SCSI_TMF 1
+#define BSG_SUB_PROTOCOL_SCSI_TRANSPORT 2
+
+/*
+ * For flags member below
+ * sg.h sg_io_hdr also has bits defined for it's flags member. However
+ * none of these bits are implemented/used by bsg. The bits below are
+ * allocated to not conflict with sg.h ones anyway.
+ */
+#define BSG_FLAG_Q_AT_TAIL 0x10 /* default, == 0 at this bit, is Q_AT_HEAD */
+
struct sg_io_v4 {
- s32 guard; /* [i] 'Q' to differentiate from v3 */
- u32 protocol; /* [i] 0 -> SCSI , .... */
- u32 subprotocol; /* [i] 0 -> SCSI command, 1 -> SCSI task
+ __s32 guard; /* [i] 'Q' to differentiate from v3 */
+ __u32 protocol; /* [i] 0 -> SCSI , .... */
+ __u32 subprotocol; /* [i] 0 -> SCSI command, 1 -> SCSI task
management function, .... */
- u32 request_len; /* [i] in bytes */
- u64 request; /* [i], [*i] {SCSI: cdb} */
- u32 request_attr; /* [i] {SCSI: task attribute} */
- u32 request_tag; /* [i] {SCSI: task tag (only if flagged)} */
- u32 request_priority; /* [i] {SCSI: task priority} */
- u32 max_response_len; /* [i] in bytes */
- u64 response; /* [i], [*o] {SCSI: (auto)sense data} */
+ __u32 request_len; /* [i] in bytes */
+ __u64 request; /* [i], [*i] {SCSI: cdb} */
+ __u64 request_tag; /* [i] {SCSI: task tag (only if flagged)} */
+ __u32 request_attr; /* [i] {SCSI: task attribute} */
+ __u32 request_priority; /* [i] {SCSI: task priority} */
+ __u32 request_extra; /* [i] {spare, for padding} */
+ __u32 max_response_len; /* [i] in bytes */
+ __u64 response; /* [i], [*o] {SCSI: (auto)sense data} */
- /* "din_" for data in (from device); "dout_" for data out (to device) */
- u32 dout_xfer_len; /* [i] bytes to be transferred to device */
- u32 din_xfer_len; /* [i] bytes to be transferred from device */
- u64 dout_xferp; /* [i], [*i] */
- u64 din_xferp; /* [i], [*o] */
+ /* "dout_": data out (to device); "din_": data in (from device) */
+ __u32 dout_iovec_count; /* [i] 0 -> "flat" dout transfer else
+ dout_xfer points to array of iovec */
+ __u32 dout_xfer_len; /* [i] bytes to be transferred to device */
+ __u32 din_iovec_count; /* [i] 0 -> "flat" din transfer */
+ __u32 din_xfer_len; /* [i] bytes to be transferred from device */
+ __u64 dout_xferp; /* [i], [*i] */
+ __u64 din_xferp; /* [i], [*o] */
- u32 timeout; /* [i] units: millisecond */
- u32 flags; /* [i] bit mask */
- u64 usr_ptr; /* [i->o] unused internally */
- u32 spare_in; /* [i] */
+ __u32 timeout; /* [i] units: millisecond */
+ __u32 flags; /* [i] bit mask */
+ __u64 usr_ptr; /* [i->o] unused internally */
+ __u32 spare_in; /* [i] */
- u32 driver_status; /* [o] 0 -> ok */
- u32 transport_status; /* [o] 0 -> ok */
- u32 device_status; /* [o] {SCSI: command completion status} */
- u32 retry_delay; /* [o] {SCSI: status auxiliary information} */
- u32 info; /* [o] additional information */
- u32 duration; /* [o] time to complete, in milliseconds */
- u32 response_len; /* [o] bytes of response actually written */
- s32 din_resid; /* [o] actual_din_xfer_len - din_xfer_len */
- u32 generated_tag; /* [o] {SCSI: task tag that transport chose} */
- u32 spare_out; /* [o] */
+ __u32 driver_status; /* [o] 0 -> ok */
+ __u32 transport_status; /* [o] 0 -> ok */
+ __u32 device_status; /* [o] {SCSI: command completion status} */
+ __u32 retry_delay; /* [o] {SCSI: status auxiliary information} */
+ __u32 info; /* [o] additional information */
+ __u32 duration; /* [o] time to complete, in milliseconds */
+ __u32 response_len; /* [o] bytes of response actually written */
+ __s32 din_resid; /* [o] din_xfer_len - actual_din_xfer_len */
+ __s32 dout_resid; /* [o] dout_xfer_len - actual_dout_xfer_len */
+ __u64 generated_tag; /* [o] {SCSI: transport generated task tag} */
+ __u32 spare_out; /* [o] */
- u32 padding;
+ __u32 padding;
};
#ifdef __KERNEL__
#if defined(CONFIG_BLK_DEV_BSG)
struct bsg_class_device {
- struct class_device *class_dev;
- struct device *dev;
+ struct device *class_dev;
+ struct device *parent;
int minor;
- struct gendisk *disk;
- struct list_head list;
+ struct request_queue *queue;
+ struct kref ref;
+ void (*release)(struct device *);
};
-extern int bsg_register_disk(struct gendisk *);
-extern void bsg_unregister_disk(struct gendisk *);
+extern int bsg_register_queue(struct request_queue *q,
+ struct device *parent, const char *name,
+ void (*release)(struct device *));
+extern void bsg_unregister_queue(struct request_queue *);
#else
-struct bsg_class_device { };
-#define bsg_register_disk(disk) (0)
-#define bsg_unregister_disk(disk) do { } while (0)
+static inline int bsg_register_queue(struct request_queue *q,
+ struct device *parent, const char *name,
+ void (*release)(struct device *))
+{
+ return 0;
+}
+static inline void bsg_unregister_queue(struct request_queue *q)
+{
+}
#endif
#endif /* __KERNEL__ */
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