Home | History | Annotate | Line # | Download | only in scsipi
scsi_base.c revision 1.79 
      1 /*	$NetBSD: scsi_base.c,v 1.79 2004/08/21 21:29:39 thorpej 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 #include <sys/cdefs.h>
     40 __KERNEL_RCSID(0, "$NetBSD: scsi_base.c,v 1.79 2004/08/21 21:29:39 thorpej Exp $");
     41 
     42 #include <sys/param.h>
     43 #include <sys/systm.h>
     44 #include <sys/kernel.h>
     45 #include <sys/buf.h>
     46 #include <sys/uio.h>
     47 #include <sys/malloc.h>
     48 #include <sys/errno.h>
     49 #include <sys/device.h>
     50 #include <sys/proc.h>
     51 
     52 #include <dev/scsipi/scsipi_all.h>
     53 #include <dev/scsipi/scsi_all.h>
     54 #include <dev/scsipi/scsi_disk.h>
     55 #include <dev/scsipi/scsiconf.h>
     56 #include <dev/scsipi/scsipi_base.h>
     57 
     58 /*
     59  * Do a scsi operation, asking a device to run as SCSI-II if it can.
     60  */
     61 int
     62 scsi_change_def(struct scsipi_periph *periph, int flags)
     63 {
     64 	struct scsi_changedef scsipi_cmd;
     65 
     66 	memset(&scsipi_cmd, 0, sizeof(scsipi_cmd));
     67 	scsipi_cmd.opcode = SCSI_CHANGE_DEFINITION;
     68 	scsipi_cmd.how = SC_SCSI_2;
     69 
     70 	return (scsipi_command(periph,
     71 	    (struct scsipi_generic *) &scsipi_cmd, sizeof(scsipi_cmd),
     72 	    0, 0, SCSIPIRETRIES, 100000, NULL, flags));
     73 }
     74 
     75 /*
     76  * ask the scsi driver to perform a command for us.
     77  * tell it where to read/write the data, and how
     78  * long the data is supposed to be. If we have  a buf
     79  * to associate with the transfer, we need that too.
     80  */
     81 int
     82 scsi_scsipi_cmd(struct scsipi_periph *periph, struct scsipi_generic *scsipi_cmd,
     83     int cmdlen, void *data, size_t datalen, int retries, int timeout,
     84     struct buf *bp, int flags)
     85 {
     86 	struct scsipi_xfer *xs;
     87 	int error, s;
     88 
     89 	SC_DEBUG(periph, SCSIPI_DB2, ("scsi_scsipi_cmd\n"));
     90 
     91 #ifdef DIAGNOSTIC
     92 	if (bp != NULL && (flags & XS_CTL_ASYNC) == 0)
     93 		panic("scsi_scsipi_cmd: buffer without async");
     94 #endif
     95 
     96 	if ((xs = scsipi_make_xs(periph, scsipi_cmd, cmdlen, data,
     97 	    datalen, retries, timeout, bp, flags)) == NULL) {
     98 		if (bp != NULL) {
     99 			s = splbio();
    100 			bp->b_flags |= B_ERROR;
    101 			bp->b_error = ENOMEM;
    102 			biodone(bp);
    103 			splx(s);
    104 		}
    105 		return (ENOMEM);
    106 	}
    107 
    108 	/*
    109 	 * Set the LUN in the CDB if we have an older device.  We also
    110 	 * set it for more modern SCSI-2 devices "just in case".
    111 	 */
    112 	if (periph->periph_version <= 2)
    113 		xs->cmd->bytes[0] |=
    114 		    ((periph->periph_lun << SCSI_CMD_LUN_SHIFT) &
    115 			SCSI_CMD_LUN_MASK);
    116 
    117 	if ((error = scsipi_execute_xs(xs)) == EJUSTRETURN)
    118 		return (0);
    119 	return (error);
    120 }
    121 
    122 /*
    123  * Utility routines often used in SCSI stuff
    124  */
    125 
    126 /*
    127  * Print out the periph's address info.
    128  */
    129 void
    130 scsi_print_addr(struct scsipi_periph *periph)
    131 {
    132 	struct scsipi_channel *chan = periph->periph_channel;
    133 	struct scsipi_adapter *adapt = chan->chan_adapter;
    134 
    135 	printf("%s(%s:%d:%d:%d): ", periph->periph_dev != NULL ?
    136 	    periph->periph_dev->dv_xname : "probe",
    137 	    adapt->adapt_dev->dv_xname,
    138 	    chan->chan_channel, periph->periph_target,
    139 	    periph->periph_lun);
    140 }
    141 
    142 /*
    143  * Kill off all pending xfers for a periph.
    144  *
    145  * Must be called at splbio().
    146  */
    147 void
    148 scsi_kill_pending(struct scsipi_periph *periph)
    149 {
    150 }
    151