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                         untimeout(aic_platform_timeout, list_scb,
  61                                   ccb->ccb_h.timeout_ch);
  62                 }
  63         }
  64 }
  65
  66 void
  67 aic_platform_timeout(void *arg)
  68 {
  69         struct  scb *scb;
  70         u_long  s;
  71
  72         scb = (struct scb *)arg;
  73         aic_lock(scb->aic_softc, &s);
  74         aic_timeout(scb);
  75         aic_unlock(scb->aic_softc, &s);
  76 }
  77
  78 int
  79 aic_spawn_recovery_thread(struct aic_softc *aic)
  80 {
  81         int error;
  82
  83         error = aic_kthread_create(aic_recovery_thread, aic,
  84                                &aic->platform_data->recovery_thread,
  85                                /*flags*/0, /*altstack*/0, "aic_recovery%d",
  86                                aic->unit);
  87         return (error);
  88 }
  89
  90 /*
  91  * Lock is not held on entry.
  92  */
  93 void
  94 aic_terminate_recovery_thread(struct aic_softc *aic)
  95 {
  96         u_long s;
  97
  98         aic_lock(aic, &s);
  99         if (aic->platform_data->recovery_thread == NULL) {
 100                 aic_unlock(aic, &s);
 101                 return;
 102         }
 103         aic->flags |= AIC_SHUTDOWN_RECOVERY;
 104         wakeup(aic);
 105         /*
 106          * Sleep on a slightly different location
 107          * for this interlock just for added safety.
 108          */
 109         tsleep(aic->platform_data, PUSER, "thtrm", 0);
 110         aic_unlock(aic, &s);
 111 }
 112
 113 static void
 114 aic_recovery_thread(void *arg)
 115 {
 116         struct aic_softc *aic;
 117         u_long s;
 118
 119 #if __FreeBSD_version >= 500000
 120         mtx_lock(&Giant);
 121 #endif
 122         aic = (struct aic_softc *)arg;
 123         aic_lock(aic, &s);
 124         for (;;) {
 125
 126                 if (LIST_EMPTY(&aic->timedout_scbs) != 0
 127                  && (aic->flags & AIC_SHUTDOWN_RECOVERY) == 0)
 128                         tsleep(aic, PUSER, "idle", 0);
 129
 130                 if ((aic->flags & AIC_SHUTDOWN_RECOVERY) != 0)
 131                         break;
 132
 133                 aic_unlock(aic, &s);
 134                 aic_recover_commands(aic);
 135                 aic_lock(aic, &s);
 136         }
 137         aic->platform_data->recovery_thread = NULL;
 138         wakeup(aic->platform_data);
 139         aic_unlock(aic, &s);
 140 #if __FreeBSD_version >= 500000
 141         mtx_unlock(&Giant);
 142 #endif
 143         kthread_exit(0);
 144 }
 145
 146 void
 147 aic_calc_geometry(struct ccb_calc_geometry *ccg, int extended)
 148 {
 149 #if __FreeBSD_version >= 500000
 150         cam_calc_geometry(ccg, extended);
 151 #else
 152         uint32_t size_mb;
 153         uint32_t secs_per_cylinder;
 154
 155         size_mb = ccg->volume_size / ((1024L * 1024L) / ccg->block_size);
 156         if (size_mb > 1024 && extended) {
 157                 ccg->heads = 255;
 158                 ccg->secs_per_track = 63;
 159         } else {
 160                 ccg->heads = 64;
 161                 ccg->secs_per_track = 32;
 162         }
 163         secs_per_cylinder = ccg->heads * ccg->secs_per_track;
 164         ccg->cylinders = ccg->volume_size / secs_per_cylinder;
 165         ccg->ccb_h.status = CAM_REQ_CMP;
 166 #endif
 167 }
 168