scsi_base.c revision 1.89.38.1
1 /* $NetBSD: scsi_base.c,v 1.89.38.1 2012/04/29 23:04:59 mrg Exp $ */ 2 3 /*- 4 * Copyright (c) 1998, 2004 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 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 __KERNEL_RCSID(0, "$NetBSD: scsi_base.c,v 1.89.38.1 2012/04/29 23:04:59 mrg Exp $"); 34 35 #include <sys/param.h> 36 #include <sys/systm.h> 37 #include <sys/kernel.h> 38 #include <sys/buf.h> 39 #include <sys/uio.h> 40 #include <sys/malloc.h> 41 #include <sys/errno.h> 42 #include <sys/device.h> 43 #include <sys/proc.h> 44 45 #include <dev/scsipi/scsipi_all.h> 46 #include <dev/scsipi/scsi_all.h> 47 #include <dev/scsipi/scsi_disk.h> 48 #include <dev/scsipi/scsiconf.h> 49 #include <dev/scsipi/scsipi_base.h> 50 51 static void scsi_print_xfer_mode(struct scsipi_periph *); 52 /* 53 * Do a scsi operation, asking a device to run as SCSI-II if it can. 54 */ 55 int 56 scsi_change_def(struct scsipi_periph *periph, int flags) 57 { 58 struct scsi_changedef cmd; 59 60 memset(&cmd, 0, sizeof(cmd)); 61 cmd.opcode = SCSI_CHANGE_DEFINITION; 62 cmd.how = SC_SCSI_2; 63 64 return (scsipi_command(periph, (void *)&cmd, sizeof(cmd), 0, 0, 65 SCSIPIRETRIES, 100000, NULL, flags)); 66 } 67 68 /* 69 * ask the scsi driver to perform a command for us. 70 * tell it where to read/write the data, and how 71 * long the data is supposed to be. If we have a buf 72 * to associate with the transfer, we need that too. 73 */ 74 void 75 scsi_scsipi_cmd(struct scsipi_xfer *xs) 76 { 77 struct scsipi_periph *periph = xs->xs_periph; 78 79 SC_DEBUG(periph, SCSIPI_DB2, ("scsi_scsipi_cmd\n")); 80 81 /* 82 * Set the LUN in the CDB if we have an older device. We also 83 * set it for more modern SCSI-2 devices "just in case". 84 */ 85 if (periph->periph_version <= 2) 86 xs->cmd->bytes[0] |= 87 ((periph->periph_lun << SCSI_CMD_LUN_SHIFT) & 88 SCSI_CMD_LUN_MASK); 89 } 90 91 /* 92 * Utility routines often used in SCSI stuff 93 */ 94 95 /* 96 * Print out the periph's address info. 97 */ 98 void 99 scsi_print_addr(struct scsipi_periph *periph) 100 { 101 struct scsipi_channel *chan = periph->periph_channel; 102 struct scsipi_adapter *adapt = chan->chan_adapter; 103 104 printf("%s(%s:%d:%d:%d): ", periph->periph_dev != NULL ? 105 device_xname(periph->periph_dev) : "probe", 106 device_xname(adapt->adapt_dev), 107 chan->chan_channel, periph->periph_target, 108 periph->periph_lun); 109 } 110 111 /* 112 * Kill off all pending xfers for a periph. 113 * 114 * Must be called at splbio(). 115 */ 116 void 117 scsi_kill_pending(struct scsipi_periph *periph) 118 { 119 } 120 121 /* 122 * scsi_print_xfer_mode: 123 * 124 * Print a parallel SCSI periph's capabilities. 125 */ 126 static void 127 scsi_print_xfer_mode(struct scsipi_periph *periph) 128 { 129 int period, freq, speed, mbs; 130 131 aprint_normal_dev(periph->periph_dev, ""); 132 if (periph->periph_mode & (PERIPH_CAP_SYNC | PERIPH_CAP_DT)) { 133 period = scsipi_sync_factor_to_period(periph->periph_period); 134 aprint_normal("sync (%d.%02dns offset %d)", 135 period / 100, period % 100, periph->periph_offset); 136 } else 137 aprint_normal("async"); 138 139 if (periph->periph_mode & PERIPH_CAP_WIDE32) 140 aprint_normal(", 32-bit"); 141 else if (periph->periph_mode & (PERIPH_CAP_WIDE16 | PERIPH_CAP_DT)) 142 aprint_normal(", 16-bit"); 143 else 144 aprint_normal(", 8-bit"); 145 146 if (periph->periph_mode & (PERIPH_CAP_SYNC | PERIPH_CAP_DT)) { 147 freq = scsipi_sync_factor_to_freq(periph->periph_period); 148 speed = freq; 149 if (periph->periph_mode & PERIPH_CAP_WIDE32) 150 speed *= 4; 151 else if (periph->periph_mode & 152 (PERIPH_CAP_WIDE16 | PERIPH_CAP_DT)) 153 speed *= 2; 154 mbs = speed / 1000; 155 if (mbs > 0) { 156 aprint_normal(" (%d.%03dMB/s)", mbs, 157 speed % 1000); 158 } else 159 aprint_normal(" (%dKB/s)", speed % 1000); 160 } 161 162 aprint_normal(" transfers"); 163 164 if (periph->periph_mode & PERIPH_CAP_TQING) 165 aprint_normal(", tagged queueing"); 166 167 aprint_normal("\n"); 168 } 169 170 /* 171 * scsi_async_event_xfer_mode: 172 * 173 * Update the xfer mode for all parallel SCSI periphs sharing the 174 * specified I_T Nexus. 175 */ 176 void 177 scsi_async_event_xfer_mode(struct scsipi_channel *chan, void *arg) 178 { 179 struct scsipi_xfer_mode *xm = arg; 180 struct scsipi_periph *periph; 181 int lun, announce, mode, period, offset; 182 183 for (lun = 0; lun < chan->chan_nluns; lun++) { 184 periph = scsipi_lookup_periph(chan, xm->xm_target, lun); 185 if (periph == NULL) 186 continue; 187 announce = 0; 188 189 /* 190 * Clamp the xfer mode down to this periph's capabilities. 191 */ 192 mode = xm->xm_mode & periph->periph_cap; 193 if (mode & PERIPH_CAP_SYNC) { 194 period = xm->xm_period; 195 offset = xm->xm_offset; 196 } else { 197 period = 0; 198 offset = 0; 199 } 200 201 /* 202 * If we do not have a valid xfer mode yet, or the parameters 203 * are different, announce them. 204 */ 205 if ((periph->periph_flags & PERIPH_MODE_VALID) == 0 || 206 periph->periph_mode != mode || 207 periph->periph_period != period || 208 periph->periph_offset != offset) 209 announce = 1; 210 211 periph->periph_mode = mode; 212 periph->periph_period = period; 213 periph->periph_offset = offset; 214 periph->periph_flags |= PERIPH_MODE_VALID; 215 216 if (announce) 217 scsi_print_xfer_mode(periph); 218 } 219 } 220 221 /* 222 * scsipi_async_event_xfer_mode: 223 * 224 * Update the xfer mode for all SAS/FC periphs sharing the 225 * specified I_T Nexus. 226 */ 227 void 228 scsi_fc_sas_async_event_xfer_mode(struct scsipi_channel *chan, void *arg) 229 { 230 struct scsipi_xfer_mode *xm = arg; 231 struct scsipi_periph *periph; 232 int lun, announce, mode; 233 234 for (lun = 0; lun < chan->chan_nluns; lun++) { 235 periph = scsipi_lookup_periph(chan, xm->xm_target, lun); 236 if (periph == NULL) 237 continue; 238 announce = 0; 239 240 /* 241 * Clamp the xfer mode down to this periph's capabilities. 242 */ 243 mode = xm->xm_mode & periph->periph_cap; 244 /* 245 * If we do not have a valid xfer mode yet, or the parameters 246 * are different, announce them. 247 */ 248 if ((periph->periph_flags & PERIPH_MODE_VALID) == 0 || 249 periph->periph_mode != mode) 250 announce = 1; 251 252 periph->periph_mode = mode; 253 periph->periph_flags |= PERIPH_MODE_VALID; 254 255 if (announce && 256 (periph->periph_mode & PERIPH_CAP_TQING) != 0) { 257 aprint_normal_dev(periph->periph_dev, 258 "tagged queueing\n"); 259 } 260 } 261 } 262
Indexes created Fri Sep 26 08:10:20 GMT 2025