X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=include%2Flinux%2Fbsg.h;h=102dc096e1cb62c7f89ee1a58f6a77e5bb8c3180;hb=b0d44c0dbbd52effb731b1c0af9afd56215c48de;hp=f415f89e0ac84ae77ba4309bb9eb023007c8f399;hpb=39dca558a5b52b63e49bc234a7e887be092aa690;p=firefly-linux-kernel-4.4.55.git

diff --git a/include/linux/bsg.h b/include/linux/bsg.h
index f415f89e0ac8..ecb4730d0868 100644
--- a/include/linux/bsg.h
+++ b/include/linux/bsg.h
@@ -1,12 +1,22 @@
 #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 , .... */
@@ -15,14 +25,18 @@ struct sg_io_v4 {
 
 	__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_tag;	/* [i] {SCSI: task tag (only if flagged)} */
 	__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) */
+        /* "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] */
@@ -39,8 +53,9 @@ struct sg_io_v4 {
 	__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} */
+	__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;
@@ -50,18 +65,28 @@ struct sg_io_v4 {
 
 #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 list_head list;
 	struct request_queue *queue;
+	struct kref ref;
+	void (*release)(struct device *);
 };
 
-extern int bsg_register_queue(struct request_queue *, struct device *, const char *);
+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
-#define bsg_register_queue(disk, dev, name)		(0)
-#define bsg_unregister_queue(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__ */