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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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3
Kernel/Graphics/Bochs/DisplayConnector.cpp → Kernel/Arch/x86/Hypervisor/BochsDisplayConnector.cpp
View file

@ -4,11 +4,12 @@
* 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/Bochs/DisplayConnector.h>
#include <Kernel/Graphics/Console/ContiguousFramebufferConsole.h>
#include <Kernel/Graphics/GraphicsManagement.h>

4
Kernel/Graphics/Bochs/DisplayConnector.h → Kernel/Arch/x86/Hypervisor/BochsDisplayConnector.h
View file

@ -26,9 +26,9 @@ public:
static NonnullLockRefPtr<BochsDisplayConnector> must_create(PhysicalAddress framebuffer_address, size_t framebuffer_resource_size, bool virtual_box_hardware);
virtual IndexID index_id() const;
private:
IndexID index_id() const;
protected:
ErrorOr<void> create_attached_framebuffer_console();
BochsDisplayConnector(PhysicalAddress framebuffer_address, size_t framebuffer_resource_size);

2
Kernel/CMakeLists.txt
View file

@ -66,7 +66,6 @@ set(KERNEL_SOURCES
Devices/HID/KeyboardDevice.cpp
Devices/HID/MouseDevice.cpp
GlobalProcessExposed.cpp
Graphics/Bochs/DisplayConnector.cpp
Graphics/Bochs/GraphicsAdapter.cpp
Graphics/Bochs/QEMUDisplayConnector.cpp
Graphics/Console/BootFramebufferConsole.cpp
@ -333,6 +332,7 @@ if ("${SERENITY_ARCH}" STREQUAL "i686" OR "${SERENITY_ARCH}" STREQUAL "x86_64")
Arch/x86/common/SmapDisabler.cpp
Arch/x86/common/Shutdown.cpp
Arch/x86/Hypervisor/BochsDisplayConnector.cpp
Arch/x86/Hypervisor/VMWareBackdoor.cpp
Arch/x86/ISABus/HID/PS2KeyboardDevice.cpp

13
Kernel/Graphics/Bochs/GraphicsAdapter.cpp
View file

@ -7,11 +7,13 @@
#include <AK/Atomic.h>
#include <AK/Checked.h>
#include <AK/Try.h>
#if ARCH(I386) || ARCH(X86_64)
# include <Kernel/Arch/x86/Hypervisor/BochsDisplayConnector.h>
#endif
#include <Kernel/Bus/PCI/API.h>
#include <Kernel/Bus/PCI/IDs.h>
#include <Kernel/Debug.h>
#include <Kernel/Graphics/Bochs/Definitions.h>
#include <Kernel/Graphics/Bochs/DisplayConnector.h>
#include <Kernel/Graphics/Bochs/GraphicsAdapter.h>
#include <Kernel/Graphics/Bochs/QEMUDisplayConnector.h>
#include <Kernel/Graphics/Console/ContiguousFramebufferConsole.h>
@ -40,6 +42,10 @@ UNMAP_AFTER_INIT ErrorOr<void> BochsGraphicsAdapter::initialize_adapter(PCI::Dev
// Note: If we use VirtualBox graphics adapter (which is based on Bochs one), we need to use IO ports
// Note: Bochs (the real bochs graphics adapter in the Bochs emulator) uses revision ID of 0x0
// and doesn't support memory-mapped IO registers.
// Note: In non x86-builds, we should never encounter VirtualBox hardware nor Pure Bochs VBE graphics,
// so just assume we can use the QEMU BochsVBE-compatible graphics adapter only.
#if ARCH(I386) || ARCH(X86_64)
bool virtual_box_hardware = (pci_device_identifier.hardware_id().vendor_id == 0x80ee && pci_device_identifier.hardware_id().device_id == 0xbeef);
auto bar0_space_size = PCI::get_BAR_space_size(pci_device_identifier.address(), PCI::HeaderType0BaseRegister::BAR0);
if (pci_device_identifier.revision_id().value() == 0x0 || virtual_box_hardware) {
@ -49,6 +55,11 @@ UNMAP_AFTER_INIT ErrorOr<void> BochsGraphicsAdapter::initialize_adapter(PCI::Dev
VERIFY(registers_mapping.region);
m_display_connector = QEMUDisplayConnector::must_create(PhysicalAddress(PCI::get_BAR0(pci_device_identifier.address()) & 0xfffffff0), bar0_space_size, move(registers_mapping));
}
#else
auto registers_mapping = TRY(Memory::map_typed_writable<BochsDisplayMMIORegisters volatile>(PhysicalAddress(PCI::get_BAR2(pci_device_identifier.address()) & 0xfffffff0)));
VERIFY(registers_mapping.region);
m_display_connector = QEMUDisplayConnector::must_create(PhysicalAddress(PCI::get_BAR0(pci_device_identifier.address()) & 0xfffffff0), bar0_space_size, move(registers_mapping));
#endif
// Note: According to Gerd Hoffmann - "The linux driver simply does
// the unblank unconditionally. With bochs-display this is not needed but

3
Kernel/Graphics/Bochs/GraphicsAdapter.h
View file

@ -19,7 +19,6 @@ namespace Kernel {
class GraphicsManagement;
struct BochsDisplayMMIORegisters;
class BochsDisplayConnector;
class BochsGraphicsAdapter final : public GenericGraphicsAdapter
, public PCI::Device {
friend class GraphicsManagement;
@ -33,6 +32,6 @@ private:
explicit BochsGraphicsAdapter(PCI::DeviceIdentifier const&);
LockRefPtr<BochsDisplayConnector> m_display_connector;
LockRefPtr<DisplayConnector> m_display_connector;
};
}

49
Kernel/Graphics/Bochs/QEMUDisplayConnector.cpp
View file

@ -7,6 +7,7 @@
#include <Kernel/Debug.h>
#include <Kernel/Devices/DeviceManagement.h>
#include <Kernel/Graphics/Bochs/QEMUDisplayConnector.h>
#include <Kernel/Graphics/Console/ContiguousFramebufferConsole.h>
#include <Kernel/Graphics/GraphicsManagement.h>
#include <LibEDID/Definitions.h>
@ -31,8 +32,54 @@ ErrorOr<void> QEMUDisplayConnector::fetch_and_initialize_edid()
return {};
}
ErrorOr<void> QEMUDisplayConnector::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 {};
}
void QEMUDisplayConnector::enable_console()
{
VERIFY(m_control_lock.is_locked());
VERIFY(m_framebuffer_console);
m_framebuffer_console->enable();
}
void QEMUDisplayConnector::disable_console()
{
VERIFY(m_control_lock.is_locked());
VERIFY(m_framebuffer_console);
m_framebuffer_console->disable();
}
ErrorOr<void> QEMUDisplayConnector::flush_first_surface()
{
return Error::from_errno(ENOTSUP);
}
ErrorOr<void> QEMUDisplayConnector::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);
}
QEMUDisplayConnector::QEMUDisplayConnector(PhysicalAddress framebuffer_address, size_t framebuffer_resource_size, Memory::TypedMapping<BochsDisplayMMIORegisters volatile> registers_mapping)
: BochsDisplayConnector(framebuffer_address, framebuffer_resource_size)
: DisplayConnector(framebuffer_address, framebuffer_resource_size, false)
, m_registers(move(registers_mapping))
{
}

25
Kernel/Graphics/Bochs/QEMUDisplayConnector.h
View file

@ -7,8 +7,9 @@
#pragma once
#include <AK/Try.h>
#include <Kernel/Graphics/Bochs/DisplayConnector.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>
@ -17,28 +18,42 @@ namespace Kernel {
struct BochsDisplayMMIORegisters;
class QEMUDisplayConnector final
: public BochsDisplayConnector {
: public DisplayConnector {
friend class BochsGraphicsAdapter;
friend class DeviceManagement;
public:
AK_TYPEDEF_DISTINCT_ORDERED_ID(u16, IndexID);
static NonnullLockRefPtr<QEMUDisplayConnector> must_create(PhysicalAddress framebuffer_address, size_t framebuffer_resource_size, Memory::TypedMapping<BochsDisplayMMIORegisters volatile>);
virtual IndexID index_id() const override;
private:
IndexID index_id() const;
ErrorOr<void> fetch_and_initialize_edid();
ErrorOr<void> create_attached_framebuffer_console();
QEMUDisplayConnector(PhysicalAddress framebuffer_address, size_t framebuffer_resource_size, Memory::TypedMapping<BochsDisplayMMIORegisters volatile>);
virtual bool mutable_mode_setting_capable() const override final { return true; }
virtual bool double_framebuffering_capable() const override { return true; }
virtual ErrorOr<void> set_mode_setting(ModeSetting const&) override;
virtual ErrorOr<void> set_y_offset(size_t y) override;
virtual ErrorOr<void> set_safe_mode_setting() override final;
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;
void set_framebuffer_to_big_endian_format();
void set_framebuffer_to_little_endian_format();
private:
virtual void enable_console() override final;
virtual void disable_console() override final;
LockRefPtr<Graphics::GenericFramebufferConsole> m_framebuffer_console;
Memory::TypedMapping<BochsDisplayMMIORegisters volatile> m_registers;
};
}