text: /*
   * Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
   * 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.
   *
   * 2. 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 HOLDER 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 <AK/Memory.h>
  #include <AK/StringView.h>
  #include <Kernel/FileSystem/FileDescription.h>
  #include <Kernel/Storage/IDEChannel.h>
  #include <Kernel/Storage/IDEController.h>
  #include <Kernel/Storage/PATADiskDevice.h>
  
  namespace Kernel {
  
  UNMAP_AFTER_INIT NonnullRefPtr<PATADiskDevice> PATADiskDevice::create(const IDEController& controller, IDEChannel& channel, DriveType type, InterfaceType interface_type, u16 cylinders, u16 heads, u16 spt, u16 capabilities, int major, int minor)
  {
      return adopt(*new PATADiskDevice(controller, channel, type, interface_type, cylinders, heads, spt, capabilities, major, minor));
  }
  
  UNMAP_AFTER_INIT PATADiskDevice::PATADiskDevice(const IDEController& controller, IDEChannel& channel, DriveType type, InterfaceType interface_type, u16 cylinders, u16 heads, u16 spt, u16 capabilities, int major, int minor)
      : StorageDevice(controller, major, minor, 512, 0)
      , m_cylinders(cylinders)
      , m_heads(heads)
      , m_sectors_per_track(spt)
      , m_capabilities(capabilities)
      , m_channel(channel)
      , m_drive_type(type)
      , m_interface_type(interface_type)
  {
  }
  
  UNMAP_AFTER_INIT PATADiskDevice::~PATADiskDevice()
  {
  }
  
  const char* PATADiskDevice::class_name() const
  {
      return "PATADiskDevice";
  }
  
  void PATADiskDevice::start_request(AsyncBlockDeviceRequest& request)
  {
      bool use_dma = !m_channel.m_io_group.bus_master_base().is_null() && m_channel.m_dma_enabled.resource();
      m_channel.start_request(request, use_dma, is_slave(), m_capabilities);
  }
  
  String PATADiskDevice::device_name() const
  {
      return String::formatted("hd{:c}", 'a' + minor());
  }
  
  size_t PATADiskDevice::max_addressable_block() const
  {
      return m_cylinders * m_heads * m_sectors_per_track;
  }
  
  bool PATADiskDevice::is_slave() const
  {
      return m_drive_type == DriveType::Slave;
  }
  
  }
  