1 /* $NetBSD: scsi_base.c,v 1.77 2001/11/15 09:48:16 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 1.77 2001/11/15 09:48:16 lukem 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(periph, flags) 63 struct scsipi_periph *periph; 64 int flags; 65 { 66 struct scsi_changedef scsipi_cmd; 67 68 memset(&scsipi_cmd, 0, sizeof(scsipi_cmd)); 69 scsipi_cmd.opcode = SCSI_CHANGE_DEFINITION; 70 scsipi_cmd.how = SC_SCSI_2; 71 72 return (scsipi_command(periph, 73 (struct scsipi_generic *) &scsipi_cmd, sizeof(scsipi_cmd), 74 0, 0, SCSIPIRETRIES, 100000, NULL, flags)); 75 } 76 77 /* 78 * ask the scsi driver to perform a command for us. 79 * tell it where to read/write the data, and how 80 * long the data is supposed to be. If we have a buf 81 * to associate with the transfer, we need that too. 82 */ 83 int 84 scsi_scsipi_cmd(periph, scsipi_cmd, cmdlen, data, datalen, 85 retries, timeout, bp, flags) 86 struct scsipi_periph *periph; 87 struct scsipi_generic *scsipi_cmd; 88 int cmdlen; 89 void *data; 90 size_t datalen; 91 int retries; 92 int timeout; 93 struct buf *bp; 94 int flags; 95 { 96 struct scsipi_xfer *xs; 97 int error, s; 98 99 SC_DEBUG(periph, SCSIPI_DB2, ("scsi_scsipi_cmd\n")); 100 101 #ifdef DIAGNOSTIC 102 if (bp != NULL && (flags & XS_CTL_ASYNC) == 0) 103 panic("scsi_scsipi_cmd: buffer without async"); 104 #endif 105 106 if ((xs = scsipi_make_xs(periph, scsipi_cmd, cmdlen, data, 107 datalen, retries, timeout, bp, flags)) == NULL) { 108 if (bp != NULL) { 109 s = splbio(); 110 bp->b_flags |= B_ERROR; 111 bp->b_error = ENOMEM; 112 biodone(bp); 113 splx(s); 114 } 115 return (ENOMEM); 116 } 117 118 /* 119 * Set the LUN in the CDB if we have an older device. We also 120 * set it for more modern SCSI-2 devices "just in case". 121 */ 122 if (periph->periph_version <= 2) 123 xs->cmd->bytes[0] |= 124 ((periph->periph_lun << SCSI_CMD_LUN_SHIFT) & 125 SCSI_CMD_LUN_MASK); 126 127 if ((error = scsipi_execute_xs(xs)) == EJUSTRETURN) 128 return (0); 129 return (error); 130 } 131 132 /* 133 * Utility routines often used in SCSI stuff 134 */ 135 136 /* 137 * Print out the periph's address info. 138 */ 139 void 140 scsi_print_addr(periph) 141 struct scsipi_periph *periph; 142 { 143 struct scsipi_channel *chan = periph->periph_channel; 144 struct scsipi_adapter *adapt = chan->chan_adapter; 145 146 printf("%s(%s:%d:%d:%d): ", periph->periph_dev != NULL ? 147 periph->periph_dev->dv_xname : "probe", 148 adapt->adapt_dev->dv_xname, 149 chan->chan_channel, periph->periph_target, 150 periph->periph_lun); 151 } 152 153 /* 154 * Kill off all pending xfers for a periph. 155 * 156 * Must be called at splbio(). 157 */ 158 void 159 scsi_kill_pending(periph) 160 struct scsipi_periph *periph; 161 { 162 struct scsipi_xfer *xs; 163 164 while ((xs = TAILQ_FIRST(&periph->periph_xferq)) != NULL) { 165 xs->error = XS_DRIVER_STUFFUP; 166 scsipi_done(xs); 167 } 168 } 169