1 /* $NetBSD: scsi_base.c,v 1.73 2000/04/03 03:37:33 enami 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/types.h> 40 #include <sys/param.h> 41 #include <sys/systm.h> 42 #include <sys/kernel.h> 43 #include <sys/buf.h> 44 #include <sys/uio.h> 45 #include <sys/malloc.h> 46 #include <sys/errno.h> 47 #include <sys/device.h> 48 #include <sys/proc.h> 49 50 #include <dev/scsipi/scsipi_all.h> 51 #include <dev/scsipi/scsi_all.h> 52 #include <dev/scsipi/scsi_disk.h> 53 #include <dev/scsipi/scsiconf.h> 54 #include <dev/scsipi/scsipi_base.h> 55 56 /* 57 * Do a scsi operation, asking a device to run as SCSI-II if it can. 58 */ 59 int 60 scsi_change_def(sc_link, flags) 61 struct scsipi_link *sc_link; 62 int flags; 63 { 64 struct scsi_changedef scsipi_cmd; 65 66 bzero(&scsipi_cmd, sizeof(scsipi_cmd)); 67 scsipi_cmd.opcode = SCSI_CHANGE_DEFINITION; 68 scsipi_cmd.how = SC_SCSI_2; 69 70 return (scsipi_command(sc_link, 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(sc_link, scsipi_cmd, cmdlen, data_addr, datalen, 83 retries, timeout, bp, flags) 84 struct scsipi_link *sc_link; 85 struct scsipi_generic *scsipi_cmd; 86 int cmdlen; 87 u_char *data_addr; 88 int datalen; 89 int retries; 90 int timeout; 91 struct buf *bp; 92 int flags; 93 { 94 struct scsipi_xfer *xs; 95 int error, s; 96 97 SC_DEBUG(sc_link, SDEV_DB2, ("scsi_scsipi_cmd\n")); 98 99 #ifdef DIAGNOSTIC 100 if (bp != NULL && (flags & XS_CTL_ASYNC) == 0) 101 panic("scsi_scsipi_cmd: buffer without async"); 102 #endif 103 104 if ((xs = scsipi_make_xs(sc_link, scsipi_cmd, cmdlen, data_addr, 105 datalen, retries, timeout, bp, flags)) == NULL) { 106 if (bp != NULL) { 107 s = splbio(); 108 bp->b_flags |= B_ERROR; 109 bp->b_error = ENOMEM; 110 biodone(bp); 111 splx(s); 112 } 113 return (ENOMEM); 114 } 115 116 /* 117 * Set the LUN in the CDB if we have an older device. We also 118 * set it for more modern SCSI-II devices "just in case". 119 */ 120 if ((sc_link->scsipi_scsi.scsi_version & SID_ANSII) <= 2) 121 xs->cmd->bytes[0] |= 122 ((sc_link->scsipi_scsi.lun << SCSI_CMD_LUN_SHIFT) & 123 SCSI_CMD_LUN_MASK); 124 125 if ((error = scsipi_execute_xs(xs)) == EJUSTRETURN) 126 return (0); 127 128 /* 129 * we have finished with the xfer stuct, free it and 130 * check if anyone else needs to be started up. 131 */ 132 s = splbio(); 133 scsipi_free_xs(xs, flags); 134 splx(s); 135 return (error); 136 } 137 138 /* 139 * Utility routines often used in SCSI stuff 140 */ 141 142 143 /* 144 * Print out the scsi_link structure's address info. 145 */ 146 void 147 scsi_print_addr(sc_link) 148 struct scsipi_link *sc_link; 149 { 150 151 printf("%s(%s:%d:%d): ", 152 sc_link->device_softc ? 153 ((struct device *)sc_link->device_softc)->dv_xname : "probe", 154 ((struct device *)sc_link->adapter_softc)->dv_xname, 155 sc_link->scsipi_scsi.target, sc_link->scsipi_scsi.lun); 156 } 157 158 /* 159 * Kill off all pending xfers for a scsipi_link. 160 * 161 * Must be called at splbio(). 162 */ 163 void 164 scsi_kill_pending(sc_link) 165 struct scsipi_link *sc_link; 166 { 167 struct scsipi_xfer *xs, *xs_next; 168 169 /* 170 * Note that the scsipi_done frees a xfer only if it is 171 * an asynchronous transaction. 172 */ 173 for (xs = TAILQ_FIRST(&sc_link->pending_xfers); xs != NULL; 174 xs = xs_next) { 175 xs_next = TAILQ_NEXT(xs, device_q); 176 xs->xs_status |= XS_STS_DONE; 177 xs->error = XS_DRIVER_STUFFUP; 178 scsipi_done(xs); 179 } 180 } 181 182 int 183 scsiprint(aux, pnp) 184 void *aux; 185 const char *pnp; 186 { 187 struct scsipi_link *l = aux; 188 189 /* only "scsibus"es can attach to "scsi"s; easy. */ 190 if (pnp) 191 printf("scsibus at %s", pnp); 192 193 /* don't print channel if the controller says there can be only one. */ 194 if (l->scsipi_scsi.channel != SCSI_CHANNEL_ONLY_ONE) 195 printf(" channel %d", l->scsipi_scsi.channel); 196 197 return (UNCONF); 198 } 199