Edit File: 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; /* 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); int bsg_setup_queue(struct device *dev, struct request_queue *q, char *name, bsg_job_fn *job_fn, int dd_job_size); void bsg_request_fn(struct request_queue *q); #endif