FreeBSD/Linux Kernel Cross Reference
sys/dev/scsipi/scsi_base.c

     /*      $NetBSD: scsi_base.c,v 1.77.18.1 2004/09/11 12:52:07 he Exp $   */
     
     /*-
      * Copyright (c) 1998 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.
     * 3. All advertising materials mentioning features or use of this software
     *    must display the following acknowledgement:
     *        This product includes software developed by the NetBSD
     *        Foundation, Inc. and its contributors.
     * 4. Neither the name of The NetBSD Foundation nor the names of its
     *    contributors may be used to endorse or promote products derived
     *    from this software without specific prior written permission.
     *
     * 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.
     */
    
    #include <sys/cdefs.h>
    __KERNEL_RCSID(0, "$NetBSD: scsi_base.c,v 1.77.18.1 2004/09/11 12:52:07 he Exp $");
    
    #include <sys/param.h>
    #include <sys/systm.h>
    #include <sys/kernel.h>
    #include <sys/buf.h>
    #include <sys/uio.h>
    #include <sys/malloc.h>
    #include <sys/errno.h>
    #include <sys/device.h>
    #include <sys/proc.h>
    
    #include <dev/scsipi/scsipi_all.h>
    #include <dev/scsipi/scsi_all.h>
    #include <dev/scsipi/scsi_disk.h>
    #include <dev/scsipi/scsiconf.h>
    #include <dev/scsipi/scsipi_base.h>
    
    /*
     * Do a scsi operation, asking a device to run as SCSI-II if it can.
     */
    int
    scsi_change_def(periph, flags)
            struct scsipi_periph *periph;
            int flags;
    {
            struct scsi_changedef scsipi_cmd;
    
            memset(&scsipi_cmd, 0, sizeof(scsipi_cmd));
            scsipi_cmd.opcode = SCSI_CHANGE_DEFINITION;
            scsipi_cmd.how = SC_SCSI_2;
    
            return (scsipi_command(periph, NULL,
                (struct scsipi_generic *) &scsipi_cmd, sizeof(scsipi_cmd),
                0, 0, SCSIPIRETRIES, 100000, NULL, flags));
    }
    
    /*
     * ask the scsi driver to perform a command for us.
     * tell it where to read/write the data, and how
     * long the data is supposed to be. If we have  a buf
     * to associate with the transfer, we need that too.
     */
    int
    scsi_scsipi_cmd(periph, xs, scsipi_cmd, cmdlen, data, datalen,
            retries, timeout, bp, flags)
            struct scsipi_periph *periph;
            struct scsipi_xfer *xs;
            struct scsipi_generic *scsipi_cmd;
            int cmdlen;
            void *data;
            size_t datalen;
            int retries;
            int timeout;
            struct buf *bp;
            int flags;
    {
            int error;
    
            SC_DEBUG(periph, SCSIPI_DB2, ("scsi_scsipi_cmd\n"));
   
   #ifdef DIAGNOSTIC
           if (bp != NULL && (flags & XS_CTL_ASYNC) == 0)
                   panic("scsi_scsipi_cmd: buffer without async");
   #endif
   
           if (xs == NULL) {
                   if ((xs = scsipi_make_xs(periph, scsipi_cmd, cmdlen, data,
                       datalen, retries, timeout, bp, flags)) == NULL) {
                           /* let the caller deal with this */
                           return (ENOMEM);
                   }
           }
   
           /*
            * Set the LUN in the CDB if we have an older device.  We also
            * set it for more modern SCSI-2 devices "just in case".
            */
           if (periph->periph_version <= 2)
                   xs->cmd->bytes[0] |=
                       ((periph->periph_lun << SCSI_CMD_LUN_SHIFT) &
                           SCSI_CMD_LUN_MASK);
   
           if ((error = scsipi_execute_xs(xs)) == EJUSTRETURN)
                   return (0);
           return (error);
   }
   
   /*
    * Utility routines often used in SCSI stuff
    */
   
   /*
    * Print out the periph's address info.
    */
   void
   scsi_print_addr(periph)
           struct scsipi_periph *periph;
   {
           struct scsipi_channel *chan = periph->periph_channel;
           struct scsipi_adapter *adapt = chan->chan_adapter;
   
           printf("%s(%s:%d:%d:%d): ", periph->periph_dev != NULL ?
               periph->periph_dev->dv_xname : "probe",
               adapt->adapt_dev->dv_xname,
               chan->chan_channel, periph->periph_target,
               periph->periph_lun);
   }
   
   /*
    * Kill off all pending xfers for a periph.
    *
    * Must be called at splbio().
    */
   void
   scsi_kill_pending(periph)
           struct scsipi_periph *periph;
   {
           struct scsipi_xfer *xs;
   
           while ((xs = TAILQ_FIRST(&periph->periph_xferq)) != NULL) {
                   xs->error = XS_DRIVER_STUFFUP;
                   scsipi_done(xs);
           }
   }

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