Home | History | Annotate | Line # | Download | only in scsipi 
      1 /*	$NetBSD: scsipi_base.h,v 1.24 2017/02/26 10:58:47 maya Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 1998, 2004 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  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #ifndef _DEV_SCSIPI_SCSIPI_BASE_H_
     33 #define _DEV_SCSIPI_SCSIPI_BASE_H_
     34 
     35 struct scsipi_xfer *scsipi_get_xs(struct scsipi_periph *, int);
     36 void	scsipi_put_xs(struct scsipi_xfer *);
     37 
     38 static __inline struct scsipi_xfer *scsipi_make_xs_internal(struct scsipi_periph *,
     39 	    struct scsipi_generic *, int cmdlen, u_char *data_addr,
     40 	    int datalen, int retries, int timeout, struct buf *,
     41 	    int flags) __unused;
     42 
     43 static __inline struct scsipi_xfer *scsipi_make_xs_unlocked(struct scsipi_periph *,
     44 	    struct scsipi_generic *, int cmdlen, u_char *data_addr,
     45 	    int datalen, int retries, int timeout, struct buf *,
     46 	    int flags) __unused;
     47 
     48 static __inline struct scsipi_xfer *scsipi_make_xs_locked(struct scsipi_periph *,
     49 	    struct scsipi_generic *, int cmdlen, u_char *data_addr,
     50 	    int datalen, int retries, int timeout, struct buf *,
     51 	    int flags) __unused;
     52 
     53 /*
     54  * Make a scsipi_xfer, and return a pointer to it.
     55  */
     56 
     57 static __inline struct scsipi_xfer *
     58 scsipi_make_xs_internal(struct scsipi_periph *periph, struct scsipi_generic *cmd,
     59     int cmdlen, u_char *data_addr, int datalen, int retries, int timeout,
     60     struct buf *bp, int flags)
     61 {
     62 	struct scsipi_xfer *xs;
     63 
     64 	if ((xs = scsipi_get_xs(periph, flags)) == NULL)
     65 		return (NULL);
     66 
     67 	/*
     68 	 * Fill out the scsipi_xfer structure.  We don't know whose context
     69 	 * the cmd is in, so copy it.
     70 	 */
     71 	memcpy(&xs->cmdstore, cmd, cmdlen);
     72 	xs->cmd = &xs->cmdstore;
     73 	xs->cmdlen = cmdlen;
     74 	xs->data = data_addr;
     75 	xs->datalen = datalen;
     76 	xs->xs_retries = retries;
     77 	xs->timeout = timeout;
     78 	xs->bp = bp;
     79 
     80 	return (xs);
     81 }
     82 
     83 static __inline struct scsipi_xfer *
     84 scsipi_make_xs_unlocked(struct scsipi_periph *periph, struct scsipi_generic *cmd,
     85     int cmdlen, u_char *data_addr, int datalen, int retries, int timeout,
     86     struct buf *bp, int flags)
     87 {
     88 
     89 	return scsipi_make_xs_internal(periph, cmd, cmdlen, data_addr,
     90 	    datalen, retries, timeout, bp, flags & ~XS_CTL_NOSLEEP);
     91 }
     92 
     93 static __inline struct scsipi_xfer *
     94 scsipi_make_xs_locked(struct scsipi_periph *periph, struct scsipi_generic *cmd,
     95     int cmdlen, u_char *data_addr, int datalen, int retries, int timeout,
     96     struct buf *bp, int flags)
     97 {
     98 
     99 	KDASSERT(mutex_owned(chan_mtx(periph->periph_channel)));
    100 	return scsipi_make_xs_internal(periph, cmd, cmdlen, data_addr,
    101 	    datalen, retries, timeout, bp, flags | XS_CTL_NOSLEEP);
    102 }
    103 
    104 #endif /* _DEV_SCSIPI_SCSIPI_BASE_H_ */
    105