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Kernel: Move x86 Bochs VBE code to the Arch/x86 directory

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To do this, we make the QEMUDisplayConnector class more standalone so it
does not need to inherit from the BochsDisplayConnector class.
This commit is contained in:
Liav A 2022-09-03 12:30:39 +03:00 • committed by Linus Groh
parent c50a81e93e
commit 8d6da9863f
7 changed files with 86 additions and 13 deletions
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151
Kernel/Arch/x86/Hypervisor/BochsDisplayConnector.cpp Normal file
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/*
* Copyright (c) 2022, Liav A. <liavalb@hotmail.co.il>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <AK/Platform.h>
#include <Kernel/Arch/x86/Hypervisor/BochsDisplayConnector.h>
#include <Kernel/Arch/x86/IO.h>
#include <Kernel/Debug.h>
#include <Kernel/Devices/DeviceManagement.h>
#include <Kernel/Graphics/Bochs/Definitions.h>
#include <Kernel/Graphics/Console/ContiguousFramebufferConsole.h>
#include <Kernel/Graphics/GraphicsManagement.h>
namespace Kernel {
NonnullLockRefPtr<BochsDisplayConnector> BochsDisplayConnector::must_create(PhysicalAddress framebuffer_address, size_t framebuffer_resource_size, bool virtual_box_hardware)
{
auto device_or_error = DeviceManagement::try_create_device<BochsDisplayConnector>(framebuffer_address, framebuffer_resource_size);
VERIFY(!device_or_error.is_error());
auto connector = device_or_error.release_value();
MUST(connector->create_attached_framebuffer_console());
if (virtual_box_hardware)
MUST(connector->initialize_edid_for_generic_monitor(Array<u8, 3> { 'V', 'B', 'X' }));
else
MUST(connector->initialize_edid_for_generic_monitor({}));
return connector;
}
BochsDisplayConnector::BochsDisplayConnector(PhysicalAddress framebuffer_address, size_t framebuffer_resource_size)
: DisplayConnector(framebuffer_address, framebuffer_resource_size, false)
{
}
ErrorOr<void> BochsDisplayConnector::create_attached_framebuffer_console()
{
// We assume safe resolution is 1024x768x32
m_framebuffer_console = Graphics::ContiguousFramebufferConsole::initialize(m_framebuffer_address.value(), 1024, 768, 1024 * sizeof(u32));
GraphicsManagement::the().set_console(*m_framebuffer_console);
return {};
}
static void set_register_with_io(u16 index, u16 data)
{
IO::out16(VBE_DISPI_IOPORT_INDEX, index);
IO::out16(VBE_DISPI_IOPORT_DATA, data);
}
static u16 get_register_with_io(u16 index)
{
IO::out16(VBE_DISPI_IOPORT_INDEX, index);
return IO::in16(VBE_DISPI_IOPORT_DATA);
}
BochsDisplayConnector::IndexID BochsDisplayConnector::index_id() const
{
return get_register_with_io(0);
}
void BochsDisplayConnector::enable_console()
{
VERIFY(m_control_lock.is_locked());
VERIFY(m_framebuffer_console);
m_framebuffer_console->enable();
}
void BochsDisplayConnector::disable_console()
{
VERIFY(m_control_lock.is_locked());
VERIFY(m_framebuffer_console);
m_framebuffer_console->disable();
}
ErrorOr<void> BochsDisplayConnector::flush_first_surface()
{
return Error::from_errno(ENOTSUP);
}
ErrorOr<void> BochsDisplayConnector::set_safe_mode_setting()
{
DisplayConnector::ModeSetting safe_mode_set {
.horizontal_stride = 1024 * sizeof(u32),
.pixel_clock_in_khz = 0, // Note: There's no pixel clock in paravirtualized hardware
.horizontal_active = 1024,
.horizontal_front_porch_pixels = 0, // Note: There's no horizontal_front_porch_pixels in paravirtualized hardware
.horizontal_sync_time_pixels = 0, // Note: There's no horizontal_sync_time_pixels in paravirtualized hardware
.horizontal_blank_pixels = 0, // Note: There's no horizontal_blank_pixels in paravirtualized hardware
.vertical_active = 768,
.vertical_front_porch_lines = 0, // Note: There's no vertical_front_porch_lines in paravirtualized hardware
.vertical_sync_time_lines = 0, // Note: There's no vertical_sync_time_lines in paravirtualized hardware
.vertical_blank_lines = 0, // Note: There's no vertical_blank_lines in paravirtualized hardware
.horizontal_offset = 0,
.vertical_offset = 0,
};
return set_mode_setting(safe_mode_set);
}
ErrorOr<void> BochsDisplayConnector::set_mode_setting(ModeSetting const& mode_setting)
{
SpinlockLocker locker(m_modeset_lock);
size_t width = mode_setting.horizontal_active;
size_t height = mode_setting.vertical_active;
dbgln_if(BXVGA_DEBUG, "BochsDisplayConnector resolution registers set to - {}x{}", width, height);
set_register_with_io(to_underlying(BochsDISPIRegisters::ENABLE), 0);
set_register_with_io(to_underlying(BochsDISPIRegisters::XRES), (u16)width);
set_register_with_io(to_underlying(BochsDISPIRegisters::YRES), (u16)height);
set_register_with_io(to_underlying(BochsDISPIRegisters::VIRT_WIDTH), (u16)width);
set_register_with_io(to_underlying(BochsDISPIRegisters::VIRT_HEIGHT), (u16)height * 2);
set_register_with_io(to_underlying(BochsDISPIRegisters::BPP), 32);
set_register_with_io(to_underlying(BochsDISPIRegisters::ENABLE), to_underlying(BochsFramebufferSettings::Enabled) | to_underlying(BochsFramebufferSettings::LinearFramebuffer));
set_register_with_io(to_underlying(BochsDISPIRegisters::BANK), 0);
if ((u16)width != get_register_with_io(to_underlying(BochsDISPIRegisters::XRES)) || (u16)height != get_register_with_io(to_underlying(BochsDISPIRegisters::YRES))) {
return Error::from_errno(ENOTIMPL);
}
auto current_horizontal_active = get_register_with_io(to_underlying(BochsDISPIRegisters::XRES));
auto current_vertical_active = get_register_with_io(to_underlying(BochsDISPIRegisters::YRES));
DisplayConnector::ModeSetting mode_set {
.horizontal_stride = current_horizontal_active * sizeof(u32),
.pixel_clock_in_khz = 0, // Note: There's no pixel clock in paravirtualized hardware
.horizontal_active = current_horizontal_active,
.horizontal_front_porch_pixels = 0, // Note: There's no horizontal_front_porch_pixels in paravirtualized hardware
.horizontal_sync_time_pixels = 0, // Note: There's no horizontal_sync_time_pixels in paravirtualized hardware
.horizontal_blank_pixels = 0, // Note: There's no horizontal_blank_pixels in paravirtualized hardware
.vertical_active = current_vertical_active,
.vertical_front_porch_lines = 0, // Note: There's no vertical_front_porch_lines in paravirtualized hardware
.vertical_sync_time_lines = 0, // Note: There's no vertical_sync_time_lines in paravirtualized hardware
.vertical_blank_lines = 0, // Note: There's no vertical_blank_lines in paravirtualized hardware
.horizontal_offset = 0,
.vertical_offset = 0,
};
m_current_mode_setting = mode_set;
return {};
}
ErrorOr<void> BochsDisplayConnector::set_y_offset(size_t)
{
// Note: Although when using this device on QEMU we can actually set the horizontal and vertical offsets
// with IO ports, this class is meant to be used for plain old Bochs graphics which might not support
// this feature at all.
return Error::from_errno(ENOTIMPL);
}
ErrorOr<void> BochsDisplayConnector::unblank()
{
return Error::from_errno(ENOTIMPL);
}
}

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Kernel/Arch/x86/Hypervisor/BochsDisplayConnector.h Normal file
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/*
* Copyright (c) 2022, Liav A. <liavalb@hotmail.co.il>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/Try.h>
#include <Kernel/Graphics/Bochs/Definitions.h>
#include <Kernel/Graphics/Console/GenericFramebufferConsole.h>
#include <Kernel/Graphics/DisplayConnector.h>
#include <Kernel/Library/LockRefPtr.h>
#include <Kernel/Locking/Spinlock.h>
#include <Kernel/Memory/TypedMapping.h>
namespace Kernel {
class BochsDisplayConnector
: public DisplayConnector {
friend class BochsGraphicsAdapter;
friend class DeviceManagement;
public:
AK_TYPEDEF_DISTINCT_ORDERED_ID(u16, IndexID);
static NonnullLockRefPtr<BochsDisplayConnector> must_create(PhysicalAddress framebuffer_address, size_t framebuffer_resource_size, bool virtual_box_hardware);
private:
IndexID index_id() const;
ErrorOr<void> create_attached_framebuffer_console();
BochsDisplayConnector(PhysicalAddress framebuffer_address, size_t framebuffer_resource_size);
virtual bool mutable_mode_setting_capable() const override final { return true; }
virtual bool double_framebuffering_capable() const override { return false; }
virtual ErrorOr<void> set_mode_setting(ModeSetting const&) override;
virtual ErrorOr<void> set_safe_mode_setting() override final;
virtual ErrorOr<void> set_y_offset(size_t y) override;
virtual ErrorOr<void> unblank() override;
virtual bool partial_flush_support() const override final { return false; }
virtual bool flush_support() const override final { return false; }
// Note: Paravirtualized hardware doesn't require a defined refresh rate for modesetting.
virtual bool refresh_rate_support() const override final { return false; }
virtual ErrorOr<void> flush_first_surface() override final;
virtual void enable_console() override final;
virtual void disable_console() override final;
LockRefPtr<Graphics::GenericFramebufferConsole> m_framebuffer_console;
};
}