| 1 | /* $NetBSD: scsi_base.c,v 1.91 2016/11/20 15:37:19 mlelstv 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 1.91 2016/11/20 15:37:19 mlelstv 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 with channel lock held |
| 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_locked(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_locked(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 | |