FreeBSD/Linux Kernel Cross Reference
sys/dev/isci/isci_domain.c

     /*-
      * BSD LICENSE
      *
      * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
      * All rights reserved.
      *
      * Redistribution and use in source and binary forms, with or without
      * modification, are permitted provided that the following conditions
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     *
     *   * Redistributions of source code must retain the above copyright
     *     notice, this list of conditions and the following disclaimer.
     *   * Redistributions in binary form must reproduce the above copyright
     *     notice, this list of conditions and the following disclaimer in
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     *     distribution.
     *
     * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
     * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
     * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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     * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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     * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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     * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     */
    
    #include <sys/cdefs.h>
    __FBSDID("$FreeBSD: releng/8.4/sys/dev/isci/isci_domain.c 233785 2012-04-02 16:31:53Z jimharris $");
    
    #include <dev/isci/isci.h>
    
    #include <cam/cam_periph.h>
    #include <cam/cam_xpt_periph.h>
    
    #include <dev/isci/scil/scif_domain.h>
    #include <dev/isci/scil/scif_remote_device.h>
    #include <dev/isci/scil/scif_controller.h>
    #include <dev/isci/scil/scif_user_callback.h>
    
    /**
     * @brief This callback method informs the framework user that something
     *        in the supplied domain has changed (e.g. a device was added or
     *        removed).
     *
     * This callback is called by the framework outside of discovery or
     * target reset processes.  Specifically, domain changes occurring
     * during these processes are handled by the framework.  For example,
     * in the case of Serial Attached SCSI, reception of a BROADCAST (CHANGE)
     * during discovery will cause discovery to restart.  Thus, discovery
     * does not complete until all BCNs are processed. Note, during controller
     * stopping/reset process, the framework user should not expect this call
     * back.
     *
     * @param[in]  controller This parameter specifies the controller object
     *             with which this callback is associated.
     * @param[in]  domain This parameter specifies the domain object with
     *             which this callback is associated.
     *
     * @return none
     */
    void
    scif_cb_domain_change_notification(SCI_CONTROLLER_HANDLE_T controller,
        SCI_DOMAIN_HANDLE_T domain)
    {
            struct ISCI_CONTROLLER *isci_controller =
                (struct ISCI_CONTROLLER *)sci_object_get_association(controller);
    
            /* When the controller start is complete, we will explicitly discover
             *  all of the domains then.  This is because SCIF will not allow
             *  any I/O to start until the controller is ready, meaning internal SMP
             *  requests triggered by domain discovery won't work until the controller
             *  is ready.
             */
            if (isci_controller->is_started == TRUE)
                scif_domain_discover(domain,
                    scif_domain_get_suggested_discover_timeout(domain),
                    DEVICE_TIMEOUT);
    }
    
    /**
     * @brief This callback method informs the framework user that a previously
     *        requested discovery operation on the domain has completed.
     *
     * @param[in]  controller This parameter specifies the controller object
     *             with which this callback is associated.
     * @param[in]  domain This parameter specifies the domain object with
     *             which this callback is associated.
     * @param[in]  completion_status This parameter indicates the results of the
     *             discovery operation.
     *
     * @return none
     */
    void
    scif_cb_domain_discovery_complete(SCI_CONTROLLER_HANDLE_T controller,
        SCI_DOMAIN_HANDLE_T domain, SCI_STATUS completion_status)
   {
   
           if(completion_status != SCI_SUCCESS)
                   isci_log_message(0, "ISCI",
                       "scif_cb_domain_discovery_complete status = 0x%x\n",
                       completion_status);
   
           isci_controller_domain_discovery_complete(
               (struct ISCI_CONTROLLER *)sci_object_get_association(controller),
               (struct ISCI_DOMAIN *) sci_object_get_association(domain));
   }
   
   /**
    * @brief This callback method informs the framework user that a previously
    *        requested reset operation on the domain has completed.
    *
    * @param[in]  controller This parameter specifies the controller object
    *             with which this callback is associated.
    * @param[in]  domain This parameter specifies the domain object with
    *             which this callback is associated.
    * @param[in]  completion_status This parameter indicates the results of the
    *             reset operation.
    *
    * @return none
    */
   void
   scif_cb_domain_reset_complete(SCI_CONTROLLER_HANDLE_T controller,
       SCI_DOMAIN_HANDLE_T domain, SCI_STATUS completion_status)
   {
   
   }
   
   /**
    * @brief This callback method informs the framework user that the domain
    *        is ready and capable of processing IO requests for devices found
    *        inside it.
    *
    * @param[in]  controller This parameter specifies the controller object
    *             with which this callback is associated.
    * @param[in]  domain This parameter specifies the domain object with
    *             which this callback is associated.
    *
    * @return none
    */
   void
   scif_cb_domain_ready(SCI_CONTROLLER_HANDLE_T controller,
       SCI_DOMAIN_HANDLE_T domain)
   {
           uint32_t i;
           struct ISCI_DOMAIN *isci_domain = sci_object_get_association(domain);
           struct ISCI_CONTROLLER *isci_controller =
               sci_object_get_association(controller);
   
           for (i = 0; i < SCI_MAX_REMOTE_DEVICES; i++) {
                   struct ISCI_REMOTE_DEVICE *remote_device =
                       isci_controller->remote_device[i];
   
                   if (remote_device != NULL &&
                       remote_device->domain == isci_domain)
                           isci_remote_device_release_device_queue(remote_device);
           }
   }
   
   /**
    * @brief This callback method informs the framework user that the domain
    *        is no longer ready. Thus, it is incapable of processing IO
    *        requests for devices found inside it.
    *
    * @param[in]  controller This parameter specifies the controller object
    *             with which this callback is associated.
    * @param[in]  domain This parameter specifies the domain object with
    *             which this callback is associated.
    *
    * @return none
    */
   void
   scif_cb_domain_not_ready(SCI_CONTROLLER_HANDLE_T controller,
       SCI_DOMAIN_HANDLE_T domain)
   {
   
   }
   
   /**
    * @brief This callback method informs the framework user that a new
    *        direct attached device was found in the domain.
    *
    * @param[in]  controller This parameter specifies the controller object
    *             with which this callback is associated.
    * @param[in]  domain This parameter specifies the domain object with
    *             which this callback is associated.
    * @param[in]  sas_address This parameter specifies the SAS address of
    *             the new device.
    * @param[in]  protocols This parameter specifies the protocols
    *             supported by the newly discovered device.
    *
    * @return none
    */
   void
   scif_cb_domain_da_device_added(SCI_CONTROLLER_HANDLE_T controller,
       SCI_DOMAIN_HANDLE_T domain, SCI_SAS_ADDRESS_T *sas_address,
       SCI_SAS_IDENTIFY_ADDRESS_FRAME_PROTOCOLS_T *protocols)
   {
           struct ISCI_REMOTE_DEVICE *remote_device;
           struct ISCI_DOMAIN *isci_domain =
               (struct ISCI_DOMAIN *)sci_object_get_association(domain);
   
           /*
            * For direct-attached devices, do not pull the device object from
            *  the pool.  Rather, use the one stored in the domain object which
            *  will ensure that we always get consistent target ids for direct
            *  attached devices.
            */
           remote_device = isci_domain->da_remote_device;
   
           scif_remote_device_construct(domain,
               (uint8_t*)remote_device + sizeof(struct ISCI_REMOTE_DEVICE),
               &(remote_device->sci_object));
   
           sci_object_set_association(remote_device->sci_object, remote_device);
   
           scif_remote_device_da_construct(remote_device->sci_object, sas_address,
               protocols);
   
           /* We do not put the device in the ISCI_CONTROLLER's device array yet.
            *  That will happen once the device becomes ready (see
            *  scif_cb_remote_device_ready).
            */
   
           remote_device->domain = isci_domain;
   }
   
   /**
    * @brief This callback method informs the framework user that a new
    *        expander attached device was found in the domain.
    *
    * @param[in]  controller This parameter specifies the controller object
    *             with which this callback is associated.
    * @param[in]  domain This parameter specifies the domain object with
    *             which this callback is associated.
    * @param[in]  containing_device This parameter specifies the remote
    *             device that contains the device that was added.
    * @param[in]  smp_response This parameter specifies the SMP response
    *             data associated with the newly discovered device.
    *
    * @return none
    */
   void
   scif_cb_domain_ea_device_added(SCI_CONTROLLER_HANDLE_T controller,
       SCI_DOMAIN_HANDLE_T domain, SCI_REMOTE_DEVICE_HANDLE_T containing_device,
       SMP_RESPONSE_DISCOVER_T *smp_response)
   {
           struct ISCI_REMOTE_DEVICE *remote_device;
           struct ISCI_DOMAIN *isci_domain =
                   (struct ISCI_DOMAIN *)sci_object_get_association(domain);
           struct ISCI_CONTROLLER *isci_controller =
                   (struct ISCI_CONTROLLER *)sci_object_get_association(controller);
   
           sci_pool_get(isci_controller->remote_device_pool, remote_device);
   
           scif_remote_device_construct( domain,
               (uint8_t*)remote_device + sizeof(struct ISCI_REMOTE_DEVICE),
               &(remote_device->sci_object));
   
           sci_object_set_association(remote_device->sci_object, remote_device);
   
           scif_remote_device_ea_construct(remote_device->sci_object,
               containing_device, smp_response);
   
           /* We do not put the device in the ISCI_CONTROLLER's device array yet.
            *  That will happen once the device becomes ready (see
            *  scif_cb_remote_device_ready).
            */
           remote_device->domain = isci_domain;
   }
   
   /**
    * @brief This callback method informs the framework user that a device
    *        has been removed from the domain.
    *
    * @param[in]  controller This parameter specifies the controller object
    *             with which this callback is associated.
    * @param[in]  domain This parameter specifies the domain object with
    *             which this callback is associated.
    * @param[in]  remote_device This parameter specifies the device object with
    *             which this callback is associated.
    *
    * @return none
    */
   void
   scif_cb_domain_device_removed(SCI_CONTROLLER_HANDLE_T controller,
       SCI_DOMAIN_HANDLE_T domain, SCI_REMOTE_DEVICE_HANDLE_T remote_device)
   {
           struct ISCI_REMOTE_DEVICE *isci_remote_device =
               (struct ISCI_REMOTE_DEVICE *)sci_object_get_association(remote_device);
           struct ISCI_DOMAIN *isci_domain =
               (struct ISCI_DOMAIN *)sci_object_get_association(domain);
           struct ISCI_CONTROLLER *isci_controller =
               (struct ISCI_CONTROLLER *)sci_object_get_association(controller);
           uint32_t path = cam_sim_path(isci_controller->sim);
           union ccb *ccb = xpt_alloc_ccb_nowait();
   
           isci_controller->remote_device[isci_remote_device->index] = NULL;
   
           xpt_create_path(&ccb->ccb_h.path, xpt_periph, path,
               isci_remote_device->index, CAM_LUN_WILDCARD);
   
           xpt_rescan(ccb);
   
           scif_remote_device_destruct(remote_device);
   
           /*
            * Only put the remote device back into the pool if it was an
            *  expander-attached device.
            */
           if (isci_remote_device != isci_domain->da_remote_device)
                   sci_pool_put(isci_controller->remote_device_pool,
                       isci_remote_device);
   }
   
   void
   isci_domain_construct(struct ISCI_DOMAIN *domain, uint32_t domain_index,
       struct ISCI_CONTROLLER *controller)
   {
   
           scif_controller_get_domain_handle( controller->scif_controller_handle,
               domain_index, &domain->sci_object);
   
           domain->index = domain_index;
           domain->controller = controller;
           sci_object_set_association(domain->sci_object, (void *)domain);
   }

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