ips.c

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   METHOD_TRACE("ips_release", 1);

   for (i = 0; i < IPS_MAX_ADAPTERS && ips_sh[i] != sh; i++);

   if (i == IPS_MAX_ADAPTERS)
      panic("(%s) release, invalid Scsi_Host pointer.\n",
            ips_name);

   ha = IPS_HA(sh);

   if (!ha)
      return (FALSE);

   /* flush the cache on the controller */
   scb = &ha->scbs[ha->max_cmds-1];

   ips_init_scb(ha, scb);

   scb->timeout = ips_cmd_timeout;
   scb->cdb[0] = IPS_CMD_FLUSH;

   scb->cmd.flush_cache.op_code = IPS_CMD_FLUSH;
   scb->cmd.flush_cache.command_id = IPS_COMMAND_ID(ha, scb);
   scb->cmd.flush_cache.state = IPS_NORM_STATE;
   scb->cmd.flush_cache.reserved = 0;
   scb->cmd.flush_cache.reserved2 = 0;
   scb->cmd.flush_cache.reserved3 = 0;
   scb->cmd.flush_cache.reserved4 = 0;

   printk("(%s%d) Flushing Cache.\n", ips_name, ha->host_num);

   /* send command */
   if (ips_send_wait(ha, scb, ips_cmd_timeout, IPS_INTR_ON) == IPS_FAILURE)
      printk("(%s%d) Incomplete Flush.\n", ips_name, ha->host_num);

   printk("(%s%d) Flushing Complete.\n", ips_name, ha->host_num);

   ips_sh[i] = NULL;
   ips_ha[i] = NULL;

   /* free extra memory */
   ips_free(ha);

   /* Free I/O Region */
   if (ha->io_addr)
      release_region(ha->io_addr, ha->io_len);

#if LINUX_VERSION_CODE >= LinuxVersionCode(2,3,17)
   if (ha->mem_addr)
      release_mem_region(ha->mem_addr, ha->mem_len);
#endif

   /* free IRQ */
   free_irq(ha->irq, ha);

   ips_released_controllers++;

   if (ips_num_controllers == ips_released_controllers)
      unregister_reboot_notifier(&ips_notifier);

   return (FALSE);
}

/****************************************************************************/
/*                                                                          */
/* Routine Name: ips_halt                                                   */
/*                                                                          */
/* Routine Description:                                                     */
/*                                                                          */
/*   Perform cleanup when the system reboots                                */
/*                                                                          */
/****************************************************************************/
static int
ips_halt(struct notifier_block *nb, ulong event, void *buf) {
   ips_scb_t *scb;
   ips_ha_t  *ha;
   int        i;

   if ((event != SYS_RESTART) && (event != SYS_HALT) &&
       (event != SYS_POWER_OFF))
      return (NOTIFY_DONE);

   for (i = 0; i < ips_next_controller; i++) {
      ha = (ips_ha_t *) ips_ha[i];

      if (!ha)
         continue;

      if (!ha->active)
         continue;

      /* flush the cache on the controller */
      scb = &ha->scbs[ha->max_cmds-1];

      ips_init_scb(ha, scb);

      scb->timeout = ips_cmd_timeout;
      scb->cdb[0] = IPS_CMD_FLUSH;

      scb->cmd.flush_cache.op_code = IPS_CMD_FLUSH;
      scb->cmd.flush_cache.command_id = IPS_COMMAND_ID(ha, scb);
      scb->cmd.flush_cache.state = IPS_NORM_STATE;
      scb->cmd.flush_cache.reserved = 0;
      scb->cmd.flush_cache.reserved2 = 0;
      scb->cmd.flush_cache.reserved3 = 0;
      scb->cmd.flush_cache.reserved4 = 0;

      printk("(%s%d) Flushing Cache.\n", ips_name, ha->host_num);

      /* send command */
      if (ips_send_wait(ha, scb, ips_cmd_timeout, IPS_INTR_ON) == IPS_FAILURE)
         printk("(%s%d) Incomplete Flush.\n", ips_name, ha->host_num);
      else
         printk("(%s%d) Flushing Complete.\n", ips_name, ha->host_num);
   }

   unregister_reboot_notifier(&ips_notifier);
   return (NOTIFY_OK);
}

/****************************************************************************/
/*                                                                          */
/* Routine Name: ips_eh_abort                                               */
/*                                                                          */
/* Routine Description:                                                     */
/*                                                                          */
/*   Abort a command (using the new error code stuff)                       */
/*                                                                          */
/****************************************************************************/
int
ips_eh_abort(Scsi_Cmnd *SC) {
   ips_ha_t         *ha;
   ips_copp_wait_item_t *item;

   METHOD_TRACE("ips_eh_abort", 1);

   if (!SC)
      return (FAILED);

   ha = (ips_ha_t *) SC->host->hostdata;

   if (!ha)
      return (FAILED);

   if (!ha->active)
      return (FAILED);

   if (SC->serial_number != SC->serial_number_at_timeout) {
      /* HMM, looks like a bogus command */
      DEBUG(1, "Abort called with bogus scsi command");

      return (FAILED);
   }

   if (test_and_set_bit(IPS_IN_ABORT, &ha->flags))
      return (FAILED);

   /* See if the command is on the copp queue */
   IPS_QUEUE_LOCK(&ha->copp_waitlist);
   item = ha->copp_waitlist.head;
   while ((item) && (item->scsi_cmd != SC))
      item = item->next;
   IPS_QUEUE_UNLOCK(&ha->copp_waitlist);

   if (item) {
      /* Found it */
      ips_removeq_copp(&ha->copp_waitlist, item);
      clear_bit(IPS_IN_ABORT, &ha->flags);

      return (SUCCESS);
   }

   /* See if the command is on the wait queue */
   if (ips_removeq_wait(&ha->scb_waitlist, SC)) {
      /* command not sent yet */
      clear_bit(IPS_IN_ABORT, &ha->flags);

      return (SUCCESS);
   } else {
      /* command must have already been sent */
      clear_bit(IPS_IN_ABORT, &ha->flags);

      return (FAILED);
   }
}

/****************************************************************************/
/*                                                                          */
/* Routine Name: ips_eh_reset                                               */
/*                                                                          */
/* Routine Description:                                                     */
/*                                                                          */
/*   Reset the controller (with new eh error code)                          */
/*                                                                          */
/* NOTE: this routine is called under the io_request_lock spinlock          */
/*                                                                          */
/****************************************************************************/
int
ips_eh_reset(Scsi_Cmnd *SC) {
   int                   ret;
   int                   i;
   u32                   cpu_flags;
   ips_ha_t             *ha;
   ips_scb_t            *scb;
   ips_copp_wait_item_t *item;

   METHOD_TRACE("ips_eh_reset", 1);

#ifdef NO_IPS_RESET
   return (FAILED);
#else

   if (!SC) {
      DEBUG(1, "Reset called with NULL scsi command");

      return (FAILED);
   }

   ha = (ips_ha_t *) SC->host->hostdata;

   if (!ha) {
      DEBUG(1, "Reset called with NULL ha struct");

      return (FAILED);
   }

   if (!ha->active)
      return (FAILED);

   if (test_and_set_bit(IPS_IN_RESET, &ha->flags))
      return (FAILED);

   /* See if the command is on the copp queue */
   IPS_QUEUE_LOCK(&ha->copp_waitlist);
   item = ha->copp_waitlist.head;
   while ((item) && (item->scsi_cmd != SC))
      item = item->next;
   IPS_QUEUE_UNLOCK(&ha->copp_waitlist);

   if (item) {
      /* Found it */
      ips_removeq_copp(&ha->copp_waitlist, item);
      clear_bit(IPS_IN_RESET, &ha->flags);

      return (SUCCESS);
   }

   /* See if the command is on the wait queue */
   if (ips_removeq_wait(&ha->scb_waitlist, SC)) {
      /* command not sent yet */
      clear_bit(IPS_IN_RESET, &ha->flags);

      return (SUCCESS);
   }

   /*
    * command must have already been sent
    * reset the controller
    */
   printk(KERN_NOTICE "(%s%d) Resetting controller.\n",
          ips_name, ha->host_num);
   ret = (*ha->func.reset)(ha);

   if (!ret) {
      Scsi_Cmnd *scsi_cmd;

      printk(KERN_NOTICE 
             "(%s%d) Controller reset failed - controller now offline.\n",
             ips_name, ha->host_num);

      /* Now fail all of the active commands */
      DEBUG_VAR(1, "(%s%d) Failing active commands",
                ips_name, ha->host_num);

      while ((scb = ips_removeq_scb_head(&ha->scb_activelist))) {
         scb->scsi_cmd->result = DID_ERROR << 16;
         scb->scsi_cmd->scsi_done(scb->scsi_cmd);
         ips_freescb(ha, scb);
      }

      /* Now fail all of the pending commands */
      DEBUG_VAR(1, "(%s%d) Failing pending commands",
                ips_name, ha->host_num);

      while ((scsi_cmd = ips_removeq_wait_head(&ha->scb_waitlist))) {
         scsi_cmd->result = DID_ERROR;
         scsi_cmd->scsi_done(scsi_cmd);
      }

      ha->active = FALSE;
      clear_bit(IPS_IN_RESET, &ha->flags);

      return (FAILED);
   }

   if (!ips_clear_adapter(ha, IPS_INTR_IORL)) {
      Scsi_Cmnd *scsi_cmd;

      printk(KERN_NOTICE 
             "(%s%d) Controller reset failed - controller now offline.\n",
             ips_name, ha->host_num);

      /* Now fail all of the active commands */
      DEBUG_VAR(1, "(%s%d) Failing active commands",
                ips_name, ha->host_num);

      while ((scb = ips_removeq_scb_head(&ha->scb_activelist))) {
         scb->scsi_cmd->result = DID_ERROR << 16;
         scb->scsi_cmd->scsi_done(scb->scsi_cmd);
         ips_freescb(ha, scb);
      }

      /* Now fail all of the pending commands */
      DEBUG_VAR(1, "(%s%d) Failing pending commands",
                ips_name, ha->host_num);

      while ((scsi_cmd = ips_removeq_wait_head(&ha->scb_waitlist))) {
         scsi_cmd->result = DID_ERROR << 16;
         scsi_cmd->scsi_done(scsi_cmd);
      }

      ha->active = FALSE;
      clear_bit(IPS_IN_RESET, &ha->flags);

      return (FAILED);
   }

   /* FFDC */
   if (ha->subsys->param[3] & 0x300000) {
      struct timeval tv;

      do_gettimeofday(&tv);
      IPS_HA_LOCK(cpu_flags);
      ha->last_ffdc = tv.tv_sec;
      ha->reset_count++;
      IPS_HA_UNLOCK(cpu_flags);
      ips_ffdc_reset(ha, IPS_INTR_IORL);
   }

   /* Now fail all of the active commands */
   DEBUG_VAR(1, "(%s%d) Failing active commands",
             ips_name, ha->host_num);

   while ((scb = ips_removeq_scb_head(&ha->scb_activelist))) {
      scb->scsi_cmd->result = (DID_RESET << 16) | (SUGGEST_RETRY << 24);
      scb->scsi_cmd->scsi_done(scb->scsi_cmd);
      ips_freescb(ha, scb);
   }

   /* Reset DCDB active command bits */
   for (i = 1; i < ha->nbus; i++)
      ha->dcdb_active[i-1] = 0;

   /* Reset the number of active IOCTLs */
   IPS_HA_LOCK(cpu_flags);
   ha->num_ioctl = 0;
   IPS_HA_UNLOCK(cpu_flags);

   clear_bit(IPS_IN_RESET, &ha->flags);

   if (!test_bit(IPS_IN_INTR, &ha->flags)) {
      /*
       * Only execute the next command when
       * we are not being called from the
       * interrupt handler.  The interrupt
       * handler wants to do this and since
       * interrupts are turned off here....
       */
      ips_next(ha, IPS_INTR_IORL);