Release 4.12 include/linux/bsg-lib.h

/*
 *  BSG helper library
 *
 *  Copyright (C) 2008   James Smart, Emulex Corporation
 *  Copyright (C) 2011   Red Hat, Inc.  All rights reserved.
 *  Copyright (C) 2011   Mike Christie
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 */
#ifndef _BLK_BSG_

#define _BLK_BSG_

#include <linux/blkdev.h>

struct request;
struct device;
struct scatterlist;
struct request_queue;


struct bsg_buffer {
	
unsigned int payload_len;
	
int sg_cnt;
	
struct scatterlist *sg_list;
};


struct bsg_job {
	
struct device *dev;
	
struct request *req;

	
struct kref kref;

	/* Transport/driver specific request/reply structs */
	
void *request;
	
void *reply;

	
unsigned int request_len;
	
unsigned int reply_len;
	/*
         * On entry : reply_len indicates the buffer size allocated for
         * the reply.
         *
         * Upon completion : the message handler must set reply_len
         *  to indicates the size of the reply to be returned to the
         *  caller.
         */

	/* DMA payloads for the request/response */
	
struct bsg_buffer request_payload;
	
struct bsg_buffer reply_payload;

	
void *dd_data;		/* Used for driver-specific storage */
};

void bsg_job_done(struct bsg_job *job, int result,
		  unsigned int reply_payload_rcv_len);
struct request_queue *bsg_setup_queue(struct device *dev, char *name,
		bsg_job_fn *job_fn, int dd_job_size);
void bsg_job_put(struct bsg_job *job);
int __must_check bsg_job_get(struct bsg_job *job);

#endif
Overall Contributors
Person
Tokens
Prop
Commits
CommitProp
Mike Christie
124
83.22%
1
20.00%
Johannes Thumshirn
22
14.77%
3
60.00%
Christoph Hellwig
3
2.01%
1
20.00%
Total
149
100.00%
5
100.00%
Directory: include/linux

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