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TOMOYO Linux Cross Reference
Linux/include/linux/bsg-lib.h

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  1 /*
  2  *  BSG helper library
  3  *
  4  *  Copyright (C) 2008   James Smart, Emulex Corporation
  5  *  Copyright (C) 2011   Red Hat, Inc.  All rights reserved.
  6  *  Copyright (C) 2011   Mike Christie
  7  *
  8  *  This program is free software; you can redistribute it and/or modify
  9  *  it under the terms of the GNU General Public License as published by
 10  *  the Free Software Foundation; either version 2 of the License, or
 11  *  (at your option) any later version.
 12  *
 13  *  This program is distributed in the hope that it will be useful,
 14  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 15  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 16  *  GNU General Public License for more details.
 17  *
 18  *  You should have received a copy of the GNU General Public License
 19  *  along with this program; if not, write to the Free Software
 20  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 21  *
 22  */
 23 #ifndef _BLK_BSG_
 24 #define _BLK_BSG_
 25 
 26 #include <linux/blkdev.h>
 27 
 28 struct request;
 29 struct device;
 30 struct scatterlist;
 31 struct request_queue;
 32 
 33 struct bsg_buffer {
 34         unsigned int payload_len;
 35         int sg_cnt;
 36         struct scatterlist *sg_list;
 37 };
 38 
 39 struct bsg_job {
 40         struct device *dev;
 41         struct request *req;
 42 
 43         /* Transport/driver specific request/reply structs */
 44         void *request;
 45         void *reply;
 46 
 47         unsigned int request_len;
 48         unsigned int reply_len;
 49         /*
 50          * On entry : reply_len indicates the buffer size allocated for
 51          * the reply.
 52          *
 53          * Upon completion : the message handler must set reply_len
 54          *  to indicates the size of the reply to be returned to the
 55          *  caller.
 56          */
 57 
 58         /* DMA payloads for the request/response */
 59         struct bsg_buffer request_payload;
 60         struct bsg_buffer reply_payload;
 61 
 62         void *dd_data;          /* Used for driver-specific storage */
 63 };
 64 
 65 void bsg_job_done(struct bsg_job *job, int result,
 66                   unsigned int reply_payload_rcv_len);
 67 int bsg_setup_queue(struct device *dev, struct request_queue *q, char *name,
 68                     bsg_job_fn *job_fn, int dd_job_size);
 69 void bsg_request_fn(struct request_queue *q);
 70 
 71 #endif
 72 

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