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Kernel: Move all Graphics-related code into Devices/GPU directory

Like the HID, Audio and Storage subsystem, the Graphics subsystem (which
handles GPUs technically) exposes unix device files (typically in /dev).
To ensure consistency across the repository, move all related files to a
new directory under Kernel/Devices called "GPU".

Also remove the redundant "GPU" word from the VirtIO driver directory,
and the word "Graphics" from GraphicsManagement.{h,cpp} filenames.
This commit is contained in:
Liav A 2023-06-03 14:47:47 +03:00 committed by Jelle Raaijmakers
parent 31a7dabf02
commit 9ee098b119
69 changed files with 167 additions and 167 deletions

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/*
* Copyright (c) 2022, Liav A. <liavalb@hotmail.co.il>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/Types.h>
namespace Kernel {
#define VBE_DISPI_IOPORT_INDEX 0x01CE
#define VBE_DISPI_IOPORT_DATA 0x01CF
#define BOCHS_DISPLAY_LITTLE_ENDIAN 0x1e1e1e1e
#define BOCHS_DISPLAY_BIG_ENDIAN 0xbebebebe
#define VBE_DISPI_ID5 0xB0C5
enum class BochsFramebufferSettings {
Enabled = 0x1,
LinearFramebuffer = 0x40,
};
enum class BochsDISPIRegisters {
ID = 0x0,
XRES = 0x1,
YRES = 0x2,
BPP = 0x3,
ENABLE = 0x4,
BANK = 0x5,
VIRT_WIDTH = 0x6,
VIRT_HEIGHT = 0x7,
X_OFFSET = 0x8,
Y_OFFSET = 0x9,
VIDEO_RAM_64K_CHUNKS_COUNT = 0xA,
};
struct [[gnu::packed]] DISPIInterface {
u16 index_id;
u16 xres;
u16 yres;
u16 bpp;
u16 enable;
u16 bank;
u16 virt_width;
u16 virt_height;
u16 x_offset;
u16 y_offset;
u16 vram_64k_chunks_count;
};
struct [[gnu::packed]] ExtensionRegisters {
u32 region_size;
u32 framebuffer_byteorder;
};
struct [[gnu::packed]] BochsDisplayMMIORegisters {
u8 edid_data[0x400];
u16 vga_ioports[0x10];
u8 reserved[0xE0];
DISPIInterface bochs_regs;
u8 reserved2[0x100 - sizeof(DISPIInterface)];
ExtensionRegisters extension_regs;
};
}

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/*
* Copyright (c) 2021, Liav A. <liavalb@hotmail.co.il>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <AK/Atomic.h>
#include <AK/Checked.h>
#include <AK/Try.h>
#if ARCH(X86_64)
# include <Kernel/Arch/x86_64/Hypervisor/BochsDisplayConnector.h>
#endif
#include <Kernel/Bus/PCI/API.h>
#include <Kernel/Bus/PCI/IDs.h>
#include <Kernel/Devices/GPU/Bochs/Definitions.h>
#include <Kernel/Devices/GPU/Bochs/GraphicsAdapter.h>
#include <Kernel/Devices/GPU/Bochs/QEMUDisplayConnector.h>
#include <Kernel/Devices/GPU/Console/ContiguousFramebufferConsole.h>
#include <Kernel/Devices/GPU/Management.h>
#include <Kernel/Memory/TypedMapping.h>
#include <Kernel/Sections.h>
namespace Kernel {
UNMAP_AFTER_INIT ErrorOr<bool> BochsGraphicsAdapter::probe(PCI::DeviceIdentifier const& pci_device_identifier)
{
PCI::HardwareID id = pci_device_identifier.hardware_id();
if (id.vendor_id == PCI::VendorID::QEMUOld && id.device_id == 0x1111)
return true;
if (id.vendor_id == PCI::VendorID::VirtualBox && id.device_id == 0xbeef)
return true;
return false;
}
UNMAP_AFTER_INIT ErrorOr<NonnullLockRefPtr<GenericGraphicsAdapter>> BochsGraphicsAdapter::create(PCI::DeviceIdentifier const& pci_device_identifier)
{
auto adapter = TRY(adopt_nonnull_lock_ref_or_enomem(new (nothrow) BochsGraphicsAdapter(pci_device_identifier)));
MUST(adapter->initialize_adapter(pci_device_identifier));
return adapter;
}
UNMAP_AFTER_INIT BochsGraphicsAdapter::BochsGraphicsAdapter(PCI::DeviceIdentifier const& device_identifier)
: PCI::Device(const_cast<PCI::DeviceIdentifier&>(device_identifier))
{
}
UNMAP_AFTER_INIT ErrorOr<void> BochsGraphicsAdapter::initialize_adapter(PCI::DeviceIdentifier const& pci_device_identifier)
{
// 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.
auto bar0_space_size = PCI::get_BAR_space_size(pci_device_identifier, PCI::HeaderType0BaseRegister::BAR0);
#if ARCH(X86_64)
bool virtual_box_hardware = (pci_device_identifier.hardware_id().vendor_id == 0x80ee && pci_device_identifier.hardware_id().device_id == 0xbeef);
if (pci_device_identifier.revision_id().value() == 0x0 || virtual_box_hardware) {
m_display_connector = BochsDisplayConnector::must_create(PhysicalAddress(PCI::get_BAR0(pci_device_identifier) & PCI::bar_address_mask), bar0_space_size, virtual_box_hardware);
} else {
auto registers_mapping = TRY(Memory::map_typed_writable<BochsDisplayMMIORegisters volatile>(PhysicalAddress(PCI::get_BAR2(pci_device_identifier) & PCI::bar_address_mask)));
VERIFY(registers_mapping.region);
m_display_connector = QEMUDisplayConnector::must_create(PhysicalAddress(PCI::get_BAR0(pci_device_identifier) & PCI::bar_address_mask), bar0_space_size, move(registers_mapping));
}
#else
auto registers_mapping = TRY(Memory::map_typed_writable<BochsDisplayMMIORegisters volatile>(PhysicalAddress(PCI::get_BAR2(pci_device_identifier) & PCI::bar_address_mask)));
VERIFY(registers_mapping.region);
m_display_connector = QEMUDisplayConnector::must_create(PhysicalAddress(PCI::get_BAR0(pci_device_identifier) & PCI::bar_address_mask), 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
// it also has no bad side effect".
// FIXME: If the error is ENOTIMPL, ignore it for now until we implement
// unblank support for VBoxDisplayConnector class too.
auto result = m_display_connector->unblank();
if (result.is_error() && result.error().code() != ENOTIMPL)
return result;
TRY(m_display_connector->set_safe_mode_setting());
return {};
}
}

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/*
* Copyright (c) 2021, Liav A. <liavalb@hotmail.co.il>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/Types.h>
#include <Kernel/Bus/PCI/Device.h>
#include <Kernel/Devices/GPU/Bochs/Definitions.h>
#include <Kernel/Devices/GPU/Console/GenericFramebufferConsole.h>
#include <Kernel/Devices/GPU/GenericGraphicsAdapter.h>
#include <Kernel/Memory/PhysicalAddress.h>
#include <Kernel/Memory/TypedMapping.h>
namespace Kernel {
class GraphicsManagement;
struct BochsDisplayMMIORegisters;
class BochsGraphicsAdapter final : public GenericGraphicsAdapter
, public PCI::Device {
friend class GraphicsManagement;
public:
static ErrorOr<bool> probe(PCI::DeviceIdentifier const&);
static ErrorOr<NonnullLockRefPtr<GenericGraphicsAdapter>> create(PCI::DeviceIdentifier const&);
virtual ~BochsGraphicsAdapter() = default;
virtual StringView device_name() const override { return "BochsGraphicsAdapter"sv; }
private:
ErrorOr<void> initialize_adapter(PCI::DeviceIdentifier const&);
explicit BochsGraphicsAdapter(PCI::DeviceIdentifier const&);
LockRefPtr<DisplayConnector> m_display_connector;
};
}

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/*
* Copyright (c) 2022, Liav A. <liavalb@hotmail.co.il>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <Kernel/Debug.h>
#include <Kernel/Devices/DeviceManagement.h>
#include <Kernel/Devices/GPU/Bochs/QEMUDisplayConnector.h>
#include <Kernel/Devices/GPU/Console/ContiguousFramebufferConsole.h>
#include <Kernel/Devices/GPU/Management.h>
#include <LibEDID/Definitions.h>
namespace Kernel {
NonnullLockRefPtr<QEMUDisplayConnector> QEMUDisplayConnector::must_create(PhysicalAddress framebuffer_address, size_t framebuffer_resource_size, Memory::TypedMapping<BochsDisplayMMIORegisters volatile> registers_mapping)
{
auto device_or_error = DeviceManagement::try_create_device<QEMUDisplayConnector>(framebuffer_address, framebuffer_resource_size, move(registers_mapping));
VERIFY(!device_or_error.is_error());
auto connector = device_or_error.release_value();
MUST(connector->create_attached_framebuffer_console());
MUST(connector->fetch_and_initialize_edid());
return connector;
}
ErrorOr<void> QEMUDisplayConnector::fetch_and_initialize_edid()
{
Array<u8, 128> bochs_edid;
static_assert(sizeof(BochsDisplayMMIORegisters::edid_data) >= sizeof(EDID::Definitions::EDID));
memcpy(bochs_edid.data(), (u8 const*)(m_registers.base_address().offset(__builtin_offsetof(BochsDisplayMMIORegisters, edid_data)).as_ptr()), sizeof(bochs_edid));
set_edid_bytes(bochs_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)
: DisplayConnector(framebuffer_address, framebuffer_resource_size, false)
, m_registers(move(registers_mapping))
{
}
QEMUDisplayConnector::IndexID QEMUDisplayConnector::index_id() const
{
return m_registers->bochs_regs.index_id;
}
void QEMUDisplayConnector::set_framebuffer_to_big_endian_format()
{
VERIFY(m_modeset_lock.is_locked());
dbgln_if(BXVGA_DEBUG, "QEMUDisplayConnector set_framebuffer_to_big_endian_format");
full_memory_barrier();
if (m_registers->extension_regs.region_size == 0xFFFFFFFF || m_registers->extension_regs.region_size == 0)
return;
full_memory_barrier();
m_registers->extension_regs.framebuffer_byteorder = BOCHS_DISPLAY_BIG_ENDIAN;
full_memory_barrier();
}
void QEMUDisplayConnector::set_framebuffer_to_little_endian_format()
{
VERIFY(m_modeset_lock.is_locked());
dbgln_if(BXVGA_DEBUG, "QEMUDisplayConnector set_framebuffer_to_little_endian_format");
full_memory_barrier();
if (m_registers->extension_regs.region_size == 0xFFFFFFFF || m_registers->extension_regs.region_size == 0)
return;
full_memory_barrier();
m_registers->extension_regs.framebuffer_byteorder = BOCHS_DISPLAY_LITTLE_ENDIAN;
full_memory_barrier();
}
ErrorOr<void> QEMUDisplayConnector::unblank()
{
SpinlockLocker locker(m_modeset_lock);
full_memory_barrier();
m_registers->vga_ioports[0] = 0x20;
full_memory_barrier();
return {};
}
ErrorOr<void> QEMUDisplayConnector::set_y_offset(size_t y_offset)
{
VERIFY(m_modeset_lock.is_locked());
m_registers->bochs_regs.y_offset = y_offset;
return {};
}
ErrorOr<void> QEMUDisplayConnector::set_mode_setting(ModeSetting const& mode_setting)
{
SpinlockLocker locker(m_modeset_lock);
VERIFY(m_framebuffer_console);
size_t width = mode_setting.horizontal_active;
size_t height = mode_setting.vertical_active;
if (Checked<size_t>::multiplication_would_overflow(width, height, sizeof(u32)))
return EOVERFLOW;
dbgln_if(BXVGA_DEBUG, "QEMUDisplayConnector resolution registers set to - {}x{}", width, height);
m_registers->bochs_regs.enable = 0;
full_memory_barrier();
m_registers->bochs_regs.xres = width;
m_registers->bochs_regs.yres = height;
m_registers->bochs_regs.virt_width = width;
m_registers->bochs_regs.virt_height = height * 2;
m_registers->bochs_regs.bpp = 32;
full_memory_barrier();
m_registers->bochs_regs.enable = to_underlying(BochsFramebufferSettings::Enabled) | to_underlying(BochsFramebufferSettings::LinearFramebuffer);
full_memory_barrier();
m_registers->bochs_regs.bank = 0;
if (index_id().value() == VBE_DISPI_ID5) {
set_framebuffer_to_little_endian_format();
}
if ((u16)width != m_registers->bochs_regs.xres || (u16)height != m_registers->bochs_regs.yres) {
return Error::from_errno(ENOTIMPL);
}
m_framebuffer_console->set_resolution(width, height, width * sizeof(u32));
DisplayConnector::ModeSetting mode_set {
.horizontal_stride = m_registers->bochs_regs.xres * sizeof(u32),
.pixel_clock_in_khz = 0, // Note: There's no pixel clock in paravirtualized hardware
.horizontal_active = m_registers->bochs_regs.xres,
.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 = m_registers->bochs_regs.yres,
.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 {};
}
}

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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/Devices/GPU/Bochs/Definitions.h>
#include <Kernel/Devices/GPU/Console/GenericFramebufferConsole.h>
#include <Kernel/Devices/GPU/DisplayConnector.h>
#include <Kernel/Library/LockRefPtr.h>
#include <Kernel/Locking/Spinlock.h>
#include <Kernel/Memory/TypedMapping.h>
namespace Kernel {
struct BochsDisplayMMIORegisters;
class QEMUDisplayConnector final
: 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>);
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();
virtual void enable_console() override final;
virtual void disable_console() override final;
LockRefPtr<Graphics::GenericFramebufferConsole> m_framebuffer_console;
Memory::TypedMapping<BochsDisplayMMIORegisters volatile> m_registers;
};
}