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 */