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scsipi_base.h revision 1.8 
      1 /*	$NetBSD: scsipi_base.h,v 1.8 1998/08/15 10:10:58 mycroft Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 1998 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Charles M. Hannum.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  * 3. All advertising materials mentioning features or use of this software
     19  *    must display the following acknowledgement:
     20  *        This product includes software developed by the NetBSD
     21  *        Foundation, Inc. and its contributors.
     22  * 4. Neither the name of The NetBSD Foundation nor the names of its
     23  *    contributors may be used to endorse or promote products derived
     24  *    from this software without specific prior written permission.
     25  *
     26  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     27  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     28  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     29  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     30  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     31  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     32  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     33  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     34  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     35  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     36  * POSSIBILITY OF SUCH DAMAGE.
     37  */
     38 
     39 extern LIST_HEAD(xs_free_list, scsipi_xfer) xs_free_list;
     40 
     41 struct scsipi_xfer *scsipi_get_xs __P((struct scsipi_link *, int));
     42 void scsipi_free_xs __P((struct scsipi_xfer *, int));
     43 
     44 static __inline struct scsipi_xfer *scsipi_make_xs __P((struct scsipi_link *,
     45 	    struct scsipi_generic *, int cmdlen, u_char *data_addr,
     46 	    int datalen, int retries, int timeout, struct buf *,
     47 	    int flags)) __attribute__ ((unused));
     48 
     49 /*
     50  * Make a scsipi_xfer, and return a pointer to it.
     51  */
     52 
     53 static __inline struct scsipi_xfer *
     54 scsipi_make_xs(sc_link, scsipi_cmd, cmdlen, data_addr, datalen,
     55     retries, timeout, bp, flags)
     56 	struct scsipi_link *sc_link;
     57 	struct scsipi_generic *scsipi_cmd;
     58 	int cmdlen;
     59 	u_char *data_addr;
     60 	int datalen;
     61 	int retries;
     62 	int timeout;
     63 	struct buf *bp;
     64 	int flags;
     65 {
     66 	struct scsipi_xfer *xs;
     67 
     68 	if ((xs = scsipi_get_xs(sc_link, flags)) == NULL)
     69 		return (NULL);
     70 
     71 	/*
     72 	 * Fill out the scsipi_xfer structure.  We don't know whose context
     73 	 * the cmd is in, so copy it.
     74 	 */
     75 	xs->sc_link = sc_link;
     76 	bcopy(scsipi_cmd, &xs->cmdstore, cmdlen);
     77 	xs->cmd = &xs->cmdstore;
     78 	xs->cmdlen = cmdlen;
     79 	xs->data = data_addr;
     80 	xs->datalen = datalen;
     81 	xs->retries = retries;
     82 	xs->timeout = timeout;
     83 	xs->bp = bp;
     84 
     85 	return (xs);
     86 }
     87