1 files changed, 73 insertions, 0 deletions
diff --git a/include/scsi/scsi_request.h b/include/scsi/scsi_request.h
new file mode 100644
index 000000000000..98719407d554
--- /dev/null
+++ b/include/scsi/scsi_request.h
@@ -0,0 +1,73 @@
+#ifndef _SCSI_SCSI_REQUEST_H
+#define _SCSI_SCSI_REQUEST_H
+
+#include <scsi/scsi_cmnd.h>
+
+struct request;
+struct scsi_cmnd;
+struct scsi_device;
+struct Scsi_Host;
+
+
+/*
+ * This is essentially a slimmed down version of Scsi_Cmnd.  The point of
+ * having this is that requests that are injected into the queue as result
+ * of things like ioctls and character devices shouldn't be using a
+ * Scsi_Cmnd until such a time that the command is actually at the head
+ * of the queue and being sent to the driver.
+ */
+struct scsi_request {
+	int     sr_magic;
+	int     sr_result;	/* Status code from lower level driver */
+	unsigned char sr_sense_buffer[SCSI_SENSE_BUFFERSIZE];		/* obtained by REQUEST SENSE
+						 * when CHECK CONDITION is
+						 * received on original command 
+						 * (auto-sense) */
+
+	struct Scsi_Host *sr_host;
+	struct scsi_device *sr_device;
+	struct scsi_cmnd *sr_command;
+	struct request *sr_request;	/* A copy of the command we are
+				   working on */
+	unsigned sr_bufflen;	/* Size of data buffer */
+	void *sr_buffer;		/* Data buffer */
+	int sr_allowed;
+	enum dma_data_direction sr_data_direction;
+	unsigned char sr_cmd_len;
+	unsigned char sr_cmnd[MAX_COMMAND_SIZE];
+	void (*sr_done) (struct scsi_cmnd *);	/* Mid-level done function */
+	int sr_timeout_per_command;
+	unsigned short sr_use_sg;	/* Number of pieces of scatter-gather */
+	unsigned short sr_sglist_len;	/* size of malloc'd scatter-gather list */
+	unsigned sr_underflow;	/* Return error if less than
+				   this amount is transferred */
+ 	void *upper_private_data;	/* reserved for owner (usually upper
+ 					   level driver) of this request */
+};
+
+extern struct scsi_request *scsi_allocate_request(struct scsi_device *, int);
+extern void scsi_release_request(struct scsi_request *);
+extern void scsi_wait_req(struct scsi_request *, const void *cmnd,
+			  void *buffer, unsigned bufflen,
+			  int timeout, int retries);
+extern void scsi_do_req(struct scsi_request *, const void *cmnd,
+			void *buffer, unsigned bufflen,
+			void (*done) (struct scsi_cmnd *),
+			int timeout, int retries);
+
+struct scsi_mode_data {
+	__u32	length;
+	__u16	block_descriptor_length;
+	__u8	medium_type;
+	__u8	device_specific;
+	__u8	header_length;
+	__u8	longlba:1;
+};
+
+extern int __scsi_mode_sense(struct scsi_request *SRpnt, int dbd,
+			     int modepage, unsigned char *buffer, int len,
+			     int timeout, int retries,
+			     struct scsi_mode_data *data);
+
+
+#endif /* _SCSI_SCSI_REQUEST_H */