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833a6bd047
If the user requests to force PIO mode, we just create IDEChannel objects which are capable of sending PIO commands only. However, if the user doesn't force PIO mode, we create BMIDEChannel objects, which are sending DMA commands. This change is somewhat simplifying the code, so each class is supporting its type of operation - PIO or DMA. The PATADiskDevice should not care if DMA is enabled or not. Later on, we could write an IDEChannel class for UDMA modes, that are available and documented on Intel specifications for their IDE controllers.
75 lines
2.8 KiB
C++
75 lines
2.8 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <AK/Memory.h>
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#include <AK/StringView.h>
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#include <Kernel/FileSystem/FileDescription.h>
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#include <Kernel/Storage/IDEChannel.h>
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#include <Kernel/Storage/IDEController.h>
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#include <Kernel/Storage/PATADiskDevice.h>
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namespace Kernel {
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UNMAP_AFTER_INIT NonnullRefPtr<PATADiskDevice> PATADiskDevice::create(const IDEController& controller, IDEChannel& channel, DriveType type, InterfaceType interface_type, u16 capabilities, u64 max_addressable_block)
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{
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return adopt(*new PATADiskDevice(controller, channel, type, interface_type, capabilities, max_addressable_block));
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}
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UNMAP_AFTER_INIT PATADiskDevice::PATADiskDevice(const IDEController& controller, IDEChannel& channel, DriveType type, InterfaceType interface_type, u16 capabilities, u64 max_addressable_block)
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: StorageDevice(controller, 512, max_addressable_block)
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, m_capabilities(capabilities)
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, m_channel(channel)
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, m_drive_type(type)
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, m_interface_type(interface_type)
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{
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}
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UNMAP_AFTER_INIT PATADiskDevice::~PATADiskDevice()
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{
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}
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const char* PATADiskDevice::class_name() const
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{
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return "PATADiskDevice";
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}
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void PATADiskDevice::start_request(AsyncBlockDeviceRequest& request)
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{
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m_channel->start_request(request, is_slave(), m_capabilities);
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}
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String PATADiskDevice::device_name() const
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{
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return String::formatted("hd{:c}", 'a' + minor());
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}
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bool PATADiskDevice::is_slave() const
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{
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return m_drive_type == DriveType::Slave;
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}
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}
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