40de84ba67
This replaces the current disk detection and disk access code with code based on https://wiki.osdev.org/IDE This allows the system to boot on VirtualBox with serial debugging enabled and VMWare Player. I believe there were several issues with the current code: - It didn't utilise the last 8 bits of the LBA in 24-bit mode. - {read,write}_sectors_with_dma was not setting the obsolete bits, which according to OSdev wiki aren't used but should be set. - The PIO and DMA methods were using slightly different copy and pasted access code, which is now put into a single function called "ata_access" - PIO mode doesn't work. This doesn't fix that and should be looked into in the future. - The detection code was not checking for ATA/ATAPI. - The detection code accidentally had cyls/heads/spt as 8-bit, when they're 16-bit. - The capabilities of the device were not considered. This is now brought in and is currently used to check if the device supports LBA. If not, use CHS.
83 lines
3.1 KiB
C++
83 lines
3.1 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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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)
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{
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return adopt(*new PATADiskDevice(controller, channel, type, interface_type, cylinders, heads, spt, capabilities, major, minor));
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}
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PATADiskDevice::PATADiskDevice(const IDEController& controller, IDEChannel& channel, DriveType type, InterfaceType interface_type, u16 cylinders, u16 heads, u16 spt, u16 capabilities, int major, int minor)
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: StorageDevice(controller, major, minor, 512, 0)
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, m_cylinders(cylinders)
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, m_heads(heads)
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, m_sectors_per_track(spt)
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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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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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bool use_dma = !m_channel.m_io_group.bus_master_base().is_null() && m_channel.m_dma_enabled.resource();
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m_channel.start_request(request, use_dma, 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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size_t PATADiskDevice::max_addressable_block() const
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{
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return m_cylinders * m_heads * m_sectors_per_track;
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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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