[SCSI] remove scsi_request infrastructure

With Achim patch the last user (gdth) is switched away from scsi_request
so we an kill it now.  Also disables some code in i2o_scsi that was
broken since the sg driver stopped using scsi_requests.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>

include/scsi/scsi_cmnd.h

@@ -9,7 +9,6 @@
 struct request;
 struct scatterlist;
 struct scsi_device;
-struct scsi_request;
 
 
 /* embedded in scsi_cmnd */
@@ -29,13 +28,8 @@ struct scsi_pointer {
 };
 
 struct scsi_cmnd {
-	int     sc_magic;
-
 	struct scsi_device *device;
-	struct scsi_request *sc_request;
-
 	struct list_head list;  /* scsi_cmnd participates in queue lists */
-
 	struct list_head eh_entry; /* entry for the host eh_cmd_q */
 	int eh_eflags;		/* Used by error handlr */
 	void (*done) (struct scsi_cmnd *);	/* Mid-level done function */

include/scsi/scsi_dbg.h

@@ -2,14 +2,12 @@
 #define _SCSI_SCSI_DBG_H
 
 struct scsi_cmnd;
-struct scsi_request;
 struct scsi_sense_hdr;
 
 extern void scsi_print_command(struct scsi_cmnd *);
 extern void scsi_print_sense_hdr(const char *, struct scsi_sense_hdr *);
 extern void __scsi_print_command(unsigned char *);
 extern void scsi_print_sense(const char *, struct scsi_cmnd *);
-extern void scsi_print_req_sense(const char *, struct scsi_request *);
 extern void __scsi_print_sense(const char *name,
 			       const unsigned char *sense_buffer,
 			       int sense_len);

include/scsi/scsi_eh.h

@@ -3,7 +3,6 @@
 
 struct scsi_cmnd;
 struct scsi_device;
-struct scsi_request;
 struct Scsi_Host;
 
 /*
@@ -43,8 +42,6 @@ extern void scsi_report_device_reset(struct Scsi_Host *, int, int);
 extern int scsi_block_when_processing_errors(struct scsi_device *);
 extern int scsi_normalize_sense(const u8 *sense_buffer, int sb_len,
 		struct scsi_sense_hdr *sshdr);
-extern int scsi_request_normalize_sense(struct scsi_request *sreq,
-		struct scsi_sense_hdr *sshdr);
 extern int scsi_command_normalize_sense(struct scsi_cmnd *cmd,
 		struct scsi_sense_hdr *sshdr);
 

include/scsi/scsi_request.h

@@ -1,54 +0,0 @@
-#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 *, gfp_t);
-extern void scsi_release_request(struct scsi_request *);
-extern void scsi_do_req(struct scsi_request *, const void *cmnd,
-			void *buffer, unsigned bufflen,
-			void (*done) (struct scsi_cmnd *),
-			int timeout, int retries);
-#endif /* _SCSI_SCSI_REQUEST_H */

include/scsi/sg_request.h

@@ -1,26 +0,0 @@
-typedef struct scsi_request Scsi_Request;
-
-static Scsi_Request *dummy_cmdp;	/* only used for sizeof */
-
-typedef struct sg_scatter_hold { /* holding area for scsi scatter gather info */
-	unsigned short k_use_sg; /* Count of kernel scatter-gather pieces */
-	unsigned short sglist_len; /* size of malloc'd scatter-gather list ++ */
-	unsigned bufflen;	/* Size of (aggregate) data buffer */
-	unsigned b_malloc_len;	/* actual len malloc'ed in buffer */
-	void *buffer;		/* Data buffer or scatter list (k_use_sg>0) */
-	char dio_in_use;	/* 0->indirect IO (or mmap), 1->dio */
-	unsigned char cmd_opcode; /* first byte of command */
-} Sg_scatter_hold;
-
-typedef struct sg_request {	/* SG_MAX_QUEUE requests outstanding per file */
-	Scsi_Request *my_cmdp;	/* != 0  when request with lower levels */
-	struct sg_request *nextrp;	/* NULL -> tail request (slist) */
-	struct sg_fd *parentfp;	/* NULL -> not in use */
-	Sg_scatter_hold data;	/* hold buffer, perhaps scatter list */
-	sg_io_hdr_t header;	/* scsi command+info, see <scsi/sg.h> */
-	unsigned char sense_b[sizeof (dummy_cmdp->sr_sense_buffer)];
-	char res_used;		/* 1 -> using reserve buffer, 0 -> not ... */
-	char orphan;		/* 1 -> drop on sight, 0 -> normal */
-	char sg_io_owned;	/* 1 -> packet belongs to SG_IO */
-	volatile char done;	/* 0->before bh, 1->before read, 2->read */
-} Sg_request;