sys/dev/aic7xxx/aic_osm_lib.c

   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                         union ccb *ccb;
  58
  59                         ccb = list_scb->io_ctx;
  60                         callout_stop(&scb->io_timer);
  61                 }
  62         }
  63 }
  64
  65 void
  66 aic_platform_timeout(void *arg)
  67 {
  68         struct  scb *scb;
  69
  70         scb = (struct scb *)arg;
  71         aic_lock(scb->aic_softc);
  72         aic_timeout(scb);
  73         aic_unlock(scb->aic_softc);
  74 }
  75
  76 int
  77 aic_spawn_recovery_thread(struct aic_softc *aic)
  78 {
  79         int error;
  80
  81         error = aic_kthread_create(aic_recovery_thread, aic,
  82                                &aic->platform_data->recovery_thread,
  83                                /*flags*/0, /*altstack*/0, "aic_recovery%d",
  84                                aic->unit);
  85         return (error);
  86 }
  87
  88 /*
  89  * Lock is not held on entry.
  90  */
  91 void
  92 aic_terminate_recovery_thread(struct aic_softc *aic)
  93 {
  94
  95         if (aic->platform_data->recovery_thread == NULL) {
  96                 return;
  97         }
  98         aic->flags |= AIC_SHUTDOWN_RECOVERY;
  99         wakeup(aic);
 100         /*
 101          * Sleep on a slightly different location
 102          * for this interlock just for added safety.
 103          */
 104         msleep(aic->platform_data, &aic->platform_data->mtx, PUSER, "thtrm", 0);
 105 }
 106
 107 static void
 108 aic_recovery_thread(void *arg)
 109 {
 110         struct aic_softc *aic;
 111
 112         aic = (struct aic_softc *)arg;
 113         aic_lock(aic);
 114         for (;;) {
 115
 116                 if (LIST_EMPTY(&aic->timedout_scbs) != 0
 117                  && (aic->flags & AIC_SHUTDOWN_RECOVERY) == 0)
 118                         msleep(aic, &aic->platform_data->mtx, PUSER, "idle", 0);
 119
 120                 if ((aic->flags & AIC_SHUTDOWN_RECOVERY) != 0)
 121                         break;
 122
 123                 aic_recover_commands(aic);
 124         }
 125         aic->platform_data->recovery_thread = NULL;
 126         wakeup(aic->platform_data);
 127         aic_unlock(aic);
 128         kproc_exit(0);
 129 }
 130
 131 void
 132 aic_calc_geometry(struct ccb_calc_geometry *ccg, int extended)
 133 {
 134 #if __FreeBSD_version >= 500000
 135         cam_calc_geometry(ccg, extended);
 136 #else
 137         uint32_t size_mb;
 138         uint32_t secs_per_cylinder;
 139
 140         size_mb = ccg->volume_size / ((1024L * 1024L) / ccg->block_size);
 141         if (size_mb > 1024 && extended) {
 142                 ccg->heads = 255;
 143                 ccg->secs_per_track = 63;
 144         } else {
 145                 ccg->heads = 64;
 146                 ccg->secs_per_track = 32;
 147         }
 148         secs_per_cylinder = ccg->heads * ccg->secs_per_track;
 149         ccg->cylinders = ccg->volume_size / secs_per_cylinder;
 150         ccg->ccb_h.status = CAM_REQ_CMP;
 151 #endif
 152 }
 153