FreeBSD/Linux Kernel Cross Reference
sys/dev/scsipi/scsipi_base.h

     /*      $NetBSD: scsipi_base.h,v 1.24 2017/02/26 10:58:47 maya Exp $    */
     
     /*-
      * Copyright (c) 1998, 2004 The NetBSD Foundation, Inc.
      * All rights reserved.
      *
      * This code is derived from software contributed to The NetBSD Foundation
      * by Charles M. Hannum.
      *
     * Redistribution and use in source and binary forms, with or without
     * modification, are permitted provided that the following conditions
     * are met:
     * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     *
     * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     * POSSIBILITY OF SUCH DAMAGE.
     */
    
    #ifndef _DEV_SCSIPI_SCSIPI_BASE_H_
    #define _DEV_SCSIPI_SCSIPI_BASE_H_
    
    struct scsipi_xfer *scsipi_get_xs(struct scsipi_periph *, int);
    void    scsipi_put_xs(struct scsipi_xfer *);
    
    static __inline struct scsipi_xfer *scsipi_make_xs_internal(struct scsipi_periph *,
                struct scsipi_generic *, int cmdlen, u_char *data_addr,
                int datalen, int retries, int timeout, struct buf *,
                int flags) __unused;
    
    static __inline struct scsipi_xfer *scsipi_make_xs_unlocked(struct scsipi_periph *,
                struct scsipi_generic *, int cmdlen, u_char *data_addr,
                int datalen, int retries, int timeout, struct buf *,
                int flags) __unused;
    
    static __inline struct scsipi_xfer *scsipi_make_xs_locked(struct scsipi_periph *,
                struct scsipi_generic *, int cmdlen, u_char *data_addr,
                int datalen, int retries, int timeout, struct buf *,
                int flags) __unused;
    
    /*
     * Make a scsipi_xfer, and return a pointer to it.
     */
    
    static __inline struct scsipi_xfer *
    scsipi_make_xs_internal(struct scsipi_periph *periph, struct scsipi_generic *cmd,
        int cmdlen, u_char *data_addr, int datalen, int retries, int timeout,
        struct buf *bp, int flags)
    {
            struct scsipi_xfer *xs;
    
            if ((xs = scsipi_get_xs(periph, flags)) == NULL)
                    return (NULL);
    
            /*
             * Fill out the scsipi_xfer structure.  We don't know whose context
             * the cmd is in, so copy it.
             */
            memcpy(&xs->cmdstore, cmd, cmdlen);
            xs->cmd = &xs->cmdstore;
            xs->cmdlen = cmdlen;
            xs->data = data_addr;
            xs->datalen = datalen;
            xs->xs_retries = retries;
            xs->timeout = timeout;
            xs->bp = bp;
    
            return (xs);
    }
    
    static __inline struct scsipi_xfer *
    scsipi_make_xs_unlocked(struct scsipi_periph *periph, struct scsipi_generic *cmd,
        int cmdlen, u_char *data_addr, int datalen, int retries, int timeout,
        struct buf *bp, int flags)
    {
    
            return scsipi_make_xs_internal(periph, cmd, cmdlen, data_addr,
                datalen, retries, timeout, bp, flags & ~XS_CTL_NOSLEEP);
    }
    
    static __inline struct scsipi_xfer *
    scsipi_make_xs_locked(struct scsipi_periph *periph, struct scsipi_generic *cmd,
        int cmdlen, u_char *data_addr, int datalen, int retries, int timeout,
        struct buf *bp, int flags)
    {
    
            KDASSERT(mutex_owned(chan_mtx(periph->periph_channel)));
           return scsipi_make_xs_internal(periph, cmd, cmdlen, data_addr,
               datalen, retries, timeout, bp, flags | XS_CTL_NOSLEEP);
   }
   
   #endif /* _DEV_SCSIPI_SCSIPI_BASE_H_ */

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