FreeBSD/Linux Kernel Cross Reference
sys/dev/isci/scil/scif_sas_high_priority_request_queue.c

     /*-
      * SPDX-License-Identifier: BSD-2-Clause OR GPL-2.0
      *
      * This file is provided under a dual BSD/GPLv2 license.  When using or
      * redistributing this file, you may do so under either license.
      *
      * GPL LICENSE SUMMARY
      *
      * Copyright(c) 2008 - 2011 Intel Corporation. All rights reserved.
     *
     * This program is free software; you can redistribute it and/or modify
     * it under the terms of version 2 of the GNU General Public License as
     * published by the Free Software Foundation.
     *
     * This program is distributed in the hope that it will be useful, but
     * WITHOUT ANY WARRANTY; without even the implied warranty of
     * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     * General Public License for more details.
     *
     * You should have received a copy of the GNU General Public License
     * along with this program; if not, write to the Free Software
     * Foundation, Inc., 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
     * The full GNU General Public License is included in this distribution
     * in the file called LICENSE.GPL.
     *
     * 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
     * are met:
     *
     *   * 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
     *     the documentation and/or other materials provided with the
     *     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
     * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
     * OWNER 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.
     */
    
    #include <sys/cdefs.h>
    __FBSDID("$FreeBSD$");
    
    /**
     * @file
     *
     * @brief This file contains all of method implementations specific to
     *        the high priority request queue (HPRQ).  See the
     *        scif_sas_high_priority_request_queue.h file for additional
     *        information.
     */
    
    #include <dev/isci/scil/scif_sas_high_priority_request_queue.h>
    
    #include <dev/isci/scil/scif_sas_logger.h>
    #include <dev/isci/scil/scif_sas_io_request.h>
    #include <dev/isci/scil/scif_sas_controller.h>
    
    /**
     * @brief This method initializes the fields of the HPRQ.  It should be
     *        called during the construction of the object containing or
     *        utilizing it (i.e. SCIF_SAS_CONTROLLER).
     *
     * @param[in] fw_hprq This parameter specific the high priority request
     *            queue object being constructed.
     *
     * @return none
     */
    void scif_sas_high_priority_request_queue_construct(
       SCIF_SAS_HIGH_PRIORITY_REQUEST_QUEUE_T * fw_hprq,
       SCI_BASE_LOGGER_T                      * logger
    )
    {
       SCIF_LOG_TRACE((
          logger,
          SCIF_LOG_OBJECT_CONTROLLER | SCIF_LOG_OBJECT_DOMAIN_DISCOVERY,
          "scif_sas_high_priority_request_queue_construct(0x%x,0x%x) enter\n",
          fw_hprq, logger
       ));
    
       sci_base_object_construct((SCI_BASE_OBJECT_T*) &fw_hprq->lock, logger);
       fw_hprq->lock.level = SCI_LOCK_LEVEL_NONE;
    
       sci_pool_initialize(fw_hprq->pool);
    }
   
   /**
    * @brief This method will ensure all internal requests destined for
    *        devices contained in the supplied domain are properly removed
    *        from the high priority request queue.
    *
    * @param[in] fw_hprq This parameter specifies the high priority request
    *            queue object for which to attempt to remove elements.
    * @param[in] fw_domain This parameter specifies the domain for which to
    *            remove all high priority requests.
    *
    * @return none
    */
   void scif_sas_high_priority_request_queue_purge_domain(
      SCIF_SAS_HIGH_PRIORITY_REQUEST_QUEUE_T * fw_hprq,
      SCIF_SAS_DOMAIN_T                      * fw_domain
   )
   {
      SCIF_SAS_IO_REQUEST_T * fw_io;
      POINTER_UINT            io_address;
      U32                     index;
      U32                     element_count;
   
      SCIF_LOG_TRACE((
         sci_base_object_get_logger(&fw_hprq->lock),
         SCIF_LOG_OBJECT_CONTROLLER | SCIF_LOG_OBJECT_DOMAIN_DISCOVERY,
         "scif_sas_high_priority_request_queue_purge_domain(0x%x,0x%x) enter\n",
         fw_hprq, fw_domain
      ));
   
      element_count = sci_pool_count(fw_hprq->pool);
   
      scif_cb_lock_acquire(fw_domain->controller, &fw_hprq->lock);
   
      for (index = 0; index < element_count; index++)
      {
         sci_pool_get(fw_hprq->pool, io_address);
   
         fw_io = (SCIF_SAS_IO_REQUEST_T*) io_address;
   
         // If the high priority request is not intended for this domain,
         // then it can be left in the pool.
         if (fw_io->parent.device->domain != fw_domain)
         {
            sci_pool_put(fw_hprq->pool, io_address);
         }
         else
         {
            if (fw_io->parent.is_internal)
            {
               SCIF_SAS_INTERNAL_IO_REQUEST_T * fw_internal_io =
                  (SCIF_SAS_INTERNAL_IO_REQUEST_T *)fw_io;
   
               // The request was intended for a device in the domain.  Put it
               // back in the pool of freely available internal request memory
               // objects. The internal IO's timer is to be destoyed.
               scif_sas_internal_io_request_destruct(fw_domain->controller, fw_internal_io);
            }
         }
      }
   
      scif_cb_lock_release(fw_domain->controller, &fw_hprq->lock);
   }
   

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