aic_osm_lib.c

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    1 /*-
    2  * FreeBSD OSM Library for the aic7xxx aic79xx based Adaptec SCSI controllers
    3  *
    4  * Copyright (c) 1994-2002 Justin T. Gibbs.
    5  * Copyright (c) 2001-2003 Adaptec Inc.
    6  * All rights reserved.
    7  *
    8  * Redistribution and use in source and binary forms, with or without
    9  * modification, are permitted provided that the following conditions
   10  * are met:
   11  * 1. Redistributions of source code must retain the above copyright
   12  *    notice, this list of conditions, and the following disclaimer,
   13  *    without modification.
   14  * 2. The name of the author may not be used to endorse or promote products
   15  *    derived from this software without specific prior written permission.
   16  *
   17  * Alternatively, this software may be distributed under the terms of the
   18  * GNU Public License ("GPL").
   19  *
   20  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
   21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   23  * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
   24  * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   30  * SUCH DAMAGE.
   31  *
   32  * $Id: //depot/aic7xxx/freebsd/dev/aic7xxx/aic_osm_lib.c#5 $
   33  */
   34 
   35 #include <sys/cdefs.h>
   36 __FBSDID("$FreeBSD$");
   37 
   38 static void     aic_recovery_thread(void *arg);
   39 
   40 void
   41 aic_set_recoveryscb(struct aic_softc *aic, struct scb *scb)
   42 {
   43 
   44         if ((scb->flags & SCB_RECOVERY_SCB) == 0) {
   45                 struct scb *list_scb;
   46 
   47                 scb->flags |= SCB_RECOVERY_SCB;
   48 
   49                 AIC_SCB_DATA(aic)->recovery_scbs++;
   50 
   51                 /*
   52                  * Go through all of our pending SCBs and remove
   53                  * any scheduled timeouts for them.  We will reschedule
   54                  * them after we've successfully fixed this problem.
   55                  */
   56                 LIST_FOREACH(list_scb, &aic->pending_scbs, pending_links) {
   57                         callout_stop(&scb->io_timer);
   58                 }
   59         }
   60 }
   61 
   62 void
   63 aic_platform_timeout(void *arg)
   64 {
   65         struct  scb *scb;
   66 
   67         scb = (struct scb *)arg; 
   68         aic_lock(scb->aic_softc);
   69         aic_timeout(scb);
   70         aic_unlock(scb->aic_softc);
   71 }
   72 
   73 int
   74 aic_spawn_recovery_thread(struct aic_softc *aic)
   75 {
   76         int error;
   77 
   78         error = aic_kthread_create(aic_recovery_thread, aic,
   79                                &aic->platform_data->recovery_thread,
   80                                /*flags*/0, /*altstack*/0, "aic_recovery%d",
   81                                aic->unit);
   82         return (error);
   83 }
   84 
   85 /*
   86  * Lock is not held on entry.
   87  */
   88 void
   89 aic_terminate_recovery_thread(struct aic_softc *aic)
   90 {
   91 
   92         if (aic->platform_data->recovery_thread == NULL) {
   93                 return;
   94         }
   95         aic->flags |= AIC_SHUTDOWN_RECOVERY;
   96         wakeup(aic);
   97         /*
   98          * Sleep on a slightly different location 
   99          * for this interlock just for added safety.
  100          */
  101         msleep(aic->platform_data, &aic->platform_data->mtx, PUSER, "thtrm", 0);
  102 }
  103 
  104 static void
  105 aic_recovery_thread(void *arg)
  106 {
  107         struct aic_softc *aic;
  108 
  109         aic = (struct aic_softc *)arg;
  110         aic_lock(aic);
  111         for (;;) {
  112                 
  113                 if (LIST_EMPTY(&aic->timedout_scbs) != 0
  114                  && (aic->flags & AIC_SHUTDOWN_RECOVERY) == 0)
  115                         msleep(aic, &aic->platform_data->mtx, PUSER, "idle", 0);
  116 
  117                 if ((aic->flags & AIC_SHUTDOWN_RECOVERY) != 0)
  118                         break;
  119 
  120                 aic_recover_commands(aic);
  121         }
  122         aic->platform_data->recovery_thread = NULL;
  123         wakeup(aic->platform_data);
  124         aic_unlock(aic);
  125         kproc_exit(0);
  126 }
  127 
  128 void
  129 aic_calc_geometry(struct ccb_calc_geometry *ccg, int extended)
  130 {
  131         cam_calc_geometry(ccg, extended);
  132 }

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FreeBSD/Linux Kernel Cross Reference sys/dev/aic7xxx/aic_osm_lib.c

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sys/dev/aic7xxx/aic_osm_lib.c