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

     /*
      * FreeBSD OSM Library for the aic7xxx aic79xx based Adaptec SCSI controllers
      *
      * Copyright (c) 1994-2002 Justin T. Gibbs.
      * Copyright (c) 2001-2003 Adaptec Inc.
      * All rights reserved.
      *
      * Redistribution and use in source and binary forms, with or without
      * modification, are permitted provided that the following conditions
     * are met:
     * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions, and the following disclaimer,
     *    without modification.
     * 2. The name of the author may not be used to endorse or promote products
     *    derived from this software without specific prior written permission.
     *
     * Alternatively, this software may be distributed under the terms of the
     * GNU Public License ("GPL").
     *
     * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
     * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     *
     * $Id: //depot/aic7xxx/freebsd/dev/aic7xxx/aic_osm_lib.c#5 $
     */
    
    #include <sys/cdefs.h>
    __FBSDID("$FreeBSD: releng/5.3/sys/dev/aic7xxx/aic_osm_lib.c 133911 2004-08-17 00:14:31Z gibbs $");
    
    static void     aic_recovery_thread(void *arg);
    
    void
    aic_set_recoveryscb(struct aic_softc *aic, struct scb *scb)
    {
    
            if ((scb->flags & SCB_RECOVERY_SCB) == 0) {
                    struct scb *list_scb;
    
                    scb->flags |= SCB_RECOVERY_SCB;
    
                    AIC_SCB_DATA(aic)->recovery_scbs++;
    
                    /*
                     * Go through all of our pending SCBs and remove
                     * any scheduled timeouts for them.  We will reschedule
                     * them after we've successfully fixed this problem.
                     */
                    LIST_FOREACH(list_scb, &aic->pending_scbs, pending_links) {
                            union ccb *ccb;
    
                            ccb = list_scb->io_ctx;
                            untimeout(aic_platform_timeout, list_scb,
                                      ccb->ccb_h.timeout_ch);
                    }
            }
    }
    
    void
    aic_platform_timeout(void *arg)
    {
            struct  scb *scb;
            u_long  s;
            
            scb = (struct scb *)arg; 
            aic_lock(scb->aic_softc, &s);
            aic_timeout(scb);
            aic_unlock(scb->aic_softc, &s);
    }
    
    int
    aic_spawn_recovery_thread(struct aic_softc *aic)
    {
            int error;
    
            error = aic_kthread_create(aic_recovery_thread, aic,
                                   &aic->platform_data->recovery_thread,
                                   /*flags*/0, /*altstack*/0, "aic_recovery%d",
                                   aic->unit);
            return (error);
    }
    
    /*
     * Lock is not held on entry.
     */
    void
    aic_terminate_recovery_thread(struct aic_softc *aic)
    {
            u_long s;
    
            aic_lock(aic, &s);
            if (aic->platform_data->recovery_thread == NULL) {
                   aic_unlock(aic, &s);
                   return;
           }
           aic->flags |= AIC_SHUTDOWN_RECOVERY;
           wakeup(aic);
           /*
            * Sleep on a slightly different location 
            * for this interlock just for added safety.
            */
           tsleep(aic->platform_data, PUSER, "thtrm", 0);
           aic_unlock(aic, &s);
   }
   
   static void
   aic_recovery_thread(void *arg)
   {
           struct aic_softc *aic;
           u_long s;
   
   #if __FreeBSD_version >= 500000
           mtx_lock(&Giant);
   #endif
           aic = (struct aic_softc *)arg;
           aic_lock(aic, &s);
           for (;;) {
                   
                   if (LIST_EMPTY(&aic->timedout_scbs) != 0
                    && (aic->flags & AIC_SHUTDOWN_RECOVERY) == 0)
                           tsleep(aic, PUSER, "idle", 0);
   
                   if ((aic->flags & AIC_SHUTDOWN_RECOVERY) != 0)
                           break;
   
                   aic_unlock(aic, &s);
                   aic_recover_commands(aic);
                   aic_lock(aic, &s);
           }
           aic->platform_data->recovery_thread = NULL;
           wakeup(aic->platform_data);
           aic_unlock(aic, &s);
   #if __FreeBSD_version >= 500000
           mtx_unlock(&Giant);
   #endif
           kthread_exit(0);
   }
   
   void
   aic_calc_geometry(struct ccb_calc_geometry *ccg, int extended)
   {
   #if __FreeBSD_version >= 500000
           cam_calc_geometry(ccg, extended);
   #else
           uint32_t size_mb;
           uint32_t secs_per_cylinder;
   
           size_mb = ccg->volume_size / ((1024L * 1024L) / ccg->block_size);
           if (size_mb > 1024 && extended) {
                   ccg->heads = 255;
                   ccg->secs_per_track = 63;
           } else {
                   ccg->heads = 64;
                   ccg->secs_per_track = 32;
           }
           secs_per_cylinder = ccg->heads * ccg->secs_per_track;
           ccg->cylinders = ccg->volume_size / secs_per_cylinder;
           ccg->ccb_h.status = CAM_REQ_CMP;
   #endif
   }
   

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