scsi_base.c

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    1 /*      $NetBSD: scsi_base.c,v 1.93 2019/05/03 16:06:56 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 1.93 2019/05/03 16:06:56 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         struct scsipi_xfer *xs;
  120 
  121         TAILQ_FOREACH(xs, &periph->periph_xferq, device_q) {
  122                 callout_stop(&xs->xs_callout);
  123                 scsi_print_addr(periph);
  124                 printf("killed ");
  125                 scsipi_print_cdb(xs->cmd);
  126                 xs->error = XS_DRIVER_STUFFUP;
  127                 scsipi_done(xs);
  128         }
  129 }
  130 
  131 /*
  132  * scsi_print_xfer_mode:
  133  *
  134  *      Print a parallel SCSI periph's capabilities.
  135  */
  136 static void
  137 scsi_print_xfer_mode(struct scsipi_periph *periph)
  138 {
  139         struct scsipi_channel *chan = periph->periph_channel;
  140         struct scsipi_adapter *adapt = chan->chan_adapter;
  141         int period, freq, speed, mbs;
  142 
  143         if (periph->periph_dev)
  144                 aprint_normal_dev(periph->periph_dev, "");
  145         else
  146                 aprint_normal("probe(%s:%d:%d:%d): ",
  147                         device_xname(adapt->adapt_dev),
  148                         chan->chan_channel, periph->periph_target,
  149                         periph->periph_lun);
  150         if (periph->periph_mode & (PERIPH_CAP_SYNC | PERIPH_CAP_DT)) {
  151                 period = scsipi_sync_factor_to_period(periph->periph_period);
  152                 aprint_normal("sync (%d.%02dns offset %d)",
  153                     period / 100, period % 100, periph->periph_offset);
  154         } else
  155                 aprint_normal("async");
  156 
  157         if (periph->periph_mode & PERIPH_CAP_WIDE32)
  158                 aprint_normal(", 32-bit");
  159         else if (periph->periph_mode & (PERIPH_CAP_WIDE16 | PERIPH_CAP_DT))
  160                 aprint_normal(", 16-bit");
  161         else
  162                 aprint_normal(", 8-bit");
  163 
  164         if (periph->periph_mode & (PERIPH_CAP_SYNC | PERIPH_CAP_DT)) {
  165                 freq = scsipi_sync_factor_to_freq(periph->periph_period);
  166                 speed = freq;
  167                 if (periph->periph_mode & PERIPH_CAP_WIDE32)
  168                         speed *= 4;
  169                 else if (periph->periph_mode &
  170                     (PERIPH_CAP_WIDE16 | PERIPH_CAP_DT))
  171                         speed *= 2;
  172                 mbs = speed / 1000;
  173                 if (mbs > 0) {
  174                         aprint_normal(" (%d.%03dMB/s)", mbs,
  175                             speed % 1000);
  176                 } else
  177                         aprint_normal(" (%dKB/s)", speed % 1000);
  178         }
  179 
  180         aprint_normal(" transfers");
  181 
  182         if (periph->periph_mode & PERIPH_CAP_TQING)
  183                 aprint_normal(", tagged queueing");
  184 
  185         aprint_normal("\n");
  186 }
  187 
  188 /*
  189  * scsi_async_event_xfer_mode:
  190  *
  191  *      Update the xfer mode for all parallel SCSI periphs sharing the
  192  *      specified I_T Nexus.
  193  */
  194 void
  195 scsi_async_event_xfer_mode(struct scsipi_channel *chan, void *arg)
  196 {
  197         struct scsipi_xfer_mode *xm = arg;
  198         struct scsipi_periph *periph;
  199         int lun, announce, mode, period, offset;
  200 
  201         for (lun = 0; lun < chan->chan_nluns; lun++) {
  202                 periph = scsipi_lookup_periph_locked(chan, xm->xm_target, lun);
  203                 if (periph == NULL)
  204                         continue;
  205                 announce = 0;
  206 
  207                 /*
  208                  * Clamp the xfer mode down to this periph's capabilities.
  209                  */
  210                 mode = xm->xm_mode & periph->periph_cap;
  211                 if (mode & PERIPH_CAP_SYNC) {
  212                         period = xm->xm_period;
  213                         offset = xm->xm_offset;
  214                 } else {
  215                         period = 0;
  216                         offset = 0;
  217                 }
  218 
  219                 /*
  220                  * If we do not have a valid xfer mode yet, or the parameters
  221                  * are different, announce them.
  222                  */
  223                 if ((periph->periph_flags & PERIPH_MODE_VALID) == 0 ||
  224                     periph->periph_mode != mode ||
  225                     periph->periph_period != period ||
  226                     periph->periph_offset != offset)
  227                         announce = 1;
  228 
  229                 periph->periph_mode = mode;
  230                 periph->periph_period = period;
  231                 periph->periph_offset = offset;
  232                 periph->periph_flags |= PERIPH_MODE_VALID;
  233 
  234                 if (announce)
  235                         scsi_print_xfer_mode(periph);
  236         }
  237 }
  238 
  239 /*
  240  * scsipi_async_event_xfer_mode:
  241  *
  242  *      Update the xfer mode for all SAS/FC periphs sharing the
  243  *      specified I_T Nexus.
  244  */
  245 void
  246 scsi_fc_sas_async_event_xfer_mode(struct scsipi_channel *chan, void *arg)
  247 {
  248         struct scsipi_xfer_mode *xm = arg;
  249         struct scsipi_periph *periph;
  250         int lun, announce, mode;
  251 
  252         for (lun = 0; lun < chan->chan_nluns; lun++) {
  253                 periph = scsipi_lookup_periph_locked(chan, xm->xm_target, lun);
  254                 if (periph == NULL)
  255                         continue;
  256                 announce = 0;
  257 
  258                 /*
  259                  * Clamp the xfer mode down to this periph's capabilities.
  260                  */
  261                 mode = xm->xm_mode & periph->periph_cap;
  262                 /*
  263                  * If we do not have a valid xfer mode yet, or the parameters
  264                  * are different, announce them.
  265                  */
  266                 if ((periph->periph_flags & PERIPH_MODE_VALID) == 0 ||
  267                     periph->periph_mode != mode)
  268                         announce = 1;
  269 
  270                 periph->periph_mode = mode;
  271                 periph->periph_flags |= PERIPH_MODE_VALID;
  272 
  273                 if (announce &&
  274                     (periph->periph_mode & PERIPH_CAP_TQING) != 0) {
  275                         aprint_normal_dev(periph->periph_dev,
  276                             "tagged queueing\n");
  277                 }
  278         }
  279 }
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FreeBSD/Linux Kernel Cross Reference sys/dev/scsipi/scsi_base.c

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sys/dev/scsipi/scsi_base.c
