1 /* $NetBSD: scsi_base.c,v 1.76 2001/11/13 06:56:39 lukem 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 1.76 2001/11/13 06:56:39 lukem Exp $"); 41 42 #include <sys/types.h> 43 #include <sys/param.h> 44 #include <sys/systm.h> 45 #include <sys/kernel.h> 46 #include <sys/buf.h> 47 #include <sys/uio.h> 48 #include <sys/malloc.h> 49 #include <sys/errno.h> 50 #include <sys/device.h> 51 #include <sys/proc.h> 52 53 #include <dev/scsipi/scsipi_all.h> 54 #include <dev/scsipi/scsi_all.h> 55 #include <dev/scsipi/scsi_disk.h> 56 #include <dev/scsipi/scsiconf.h> 57 #include <dev/scsipi/scsipi_base.h> 58 59 /* 60 * Do a scsi operation, asking a device to run as SCSI-II if it can. 61 */ 62 int 63 scsi_change_def(periph, flags) 64 struct scsipi_periph *periph; 65 int flags; 66 { 67 struct scsi_changedef scsipi_cmd; 68 69 memset(&scsipi_cmd, 0, sizeof(scsipi_cmd)); 70 scsipi_cmd.opcode = SCSI_CHANGE_DEFINITION; 71 scsipi_cmd.how = SC_SCSI_2; 72 73 return (scsipi_command(periph, 74 (struct scsipi_generic *) &scsipi_cmd, sizeof(scsipi_cmd), 75 0, 0, SCSIPIRETRIES, 100000, NULL, flags)); 76 } 77 78 /* 79 * ask the scsi driver to perform a command for us. 80 * tell it where to read/write the data, and how 81 * long the data is supposed to be. If we have a buf 82 * to associate with the transfer, we need that too. 83 */ 84 int 85 scsi_scsipi_cmd(periph, scsipi_cmd, cmdlen, data, datalen, 86 retries, timeout, bp, flags) 87 struct scsipi_periph *periph; 88 struct scsipi_generic *scsipi_cmd; 89 int cmdlen; 90 void *data; 91 size_t datalen; 92 int retries; 93 int timeout; 94 struct buf *bp; 95 int flags; 96 { 97 struct scsipi_xfer *xs; 98 int error, s; 99 100 SC_DEBUG(periph, SCSIPI_DB2, ("scsi_scsipi_cmd\n")); 101 102 #ifdef DIAGNOSTIC 103 if (bp != NULL && (flags & XS_CTL_ASYNC) == 0) 104 panic("scsi_scsipi_cmd: buffer without async"); 105 #endif 106 107 if ((xs = scsipi_make_xs(periph, scsipi_cmd, cmdlen, data, 108 datalen, retries, timeout, bp, flags)) == NULL) { 109 if (bp != NULL) { 110 s = splbio(); 111 bp->b_flags |= B_ERROR; 112 bp->b_error = ENOMEM; 113 biodone(bp); 114 splx(s); 115 } 116 return (ENOMEM); 117 } 118 119 /* 120 * Set the LUN in the CDB if we have an older device. We also 121 * set it for more modern SCSI-2 devices "just in case". 122 */ 123 if (periph->periph_version <= 2) 124 xs->cmd->bytes[0] |= 125 ((periph->periph_lun << SCSI_CMD_LUN_SHIFT) & 126 SCSI_CMD_LUN_MASK); 127 128 if ((error = scsipi_execute_xs(xs)) == EJUSTRETURN) 129 return (0); 130 return (error); 131 } 132 133 /* 134 * Utility routines often used in SCSI stuff 135 */ 136 137 /* 138 * Print out the periph's address info. 139 */ 140 void 141 scsi_print_addr(periph) 142 struct scsipi_periph *periph; 143 { 144 struct scsipi_channel *chan = periph->periph_channel; 145 struct scsipi_adapter *adapt = chan->chan_adapter; 146 147 printf("%s(%s:%d:%d:%d): ", periph->periph_dev != NULL ? 148 periph->periph_dev->dv_xname : "probe", 149 adapt->adapt_dev->dv_xname, 150 chan->chan_channel, periph->periph_target, 151 periph->periph_lun); 152 } 153 154 /* 155 * Kill off all pending xfers for a periph. 156 * 157 * Must be called at splbio(). 158 */ 159 void 160 scsi_kill_pending(periph) 161 struct scsipi_periph *periph; 162 { 163 struct scsipi_xfer *xs; 164 165 while ((xs = TAILQ_FIRST(&periph->periph_xferq)) != NULL) { 166 xs->error = XS_DRIVER_STUFFUP; 167 scsipi_done(xs); 168 } 169 } 170