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Everywhere: Purge all support and usage of framebuffer devices

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Long live the DisplayConnector object!
This commit is contained in:
Liav A 2022-04-30 15:27:42 +03:00 • committed by Andreas Kling
parent aad968cc5e
commit e301af8352
25 changed files with 90 additions and 995 deletions
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26
Kernel/API/FB.h
View file

@ -18,32 +18,6 @@ ALWAYS_INLINE int graphics_connector_get_properties(int fd, GraphicsConnectorPro
return ioctl(fd, GRAPHICS_IOCTL_GET_PROPERTIES, info);
}
// FIXME: Remove this once framebuffer devices are removed.
ALWAYS_INLINE int fb_get_head_properties(int fd, FBHeadProperties* info)
{
return ioctl(fd, GRAPHICS_IOCTL_GET_HEAD_PROPERTIES, info);
}
// FIXME: Remove this once framebuffer devices are removed.
ALWAYS_INLINE int fb_get_resolution(int fd, FBHeadResolution* info)
{
FBHeadProperties head_properties;
head_properties.head_index = info->head_index;
if (auto rc = ioctl(fd, GRAPHICS_IOCTL_GET_HEAD_PROPERTIES, &head_properties); rc < 0)
return rc;
info->head_index = head_properties.head_index;
info->pitch = head_properties.pitch;
info->width = head_properties.width;
info->height = head_properties.height;
return 0;
}
// FIXME: Remove this once framebuffer devices are removed.
ALWAYS_INLINE int fb_set_resolution(int fd, FBHeadResolution* info)
{
return ioctl(fd, GRAPHICS_IOCTL_SET_HEAD_RESOLUTION, info);
}
ALWAYS_INLINE int graphics_connector_get_head_edid(int fd, GraphicsHeadEDID* info)
{
return ioctl(fd, GRAPHICS_IOCTL_GET_HEAD_EDID, info);

2
Kernel/CMakeLists.txt
View file

@ -83,7 +83,6 @@ set(KERNEL_SOURCES
Graphics/Console/TextModeConsole.cpp
Graphics/Console/VGAConsole.cpp
Graphics/DisplayConnector.cpp
Graphics/FramebufferDevice.cpp
Graphics/GraphicsManagement.cpp
Graphics/Intel/NativeDisplayConnector.cpp
Graphics/Intel/NativeGraphicsAdapter.cpp
@ -95,7 +94,6 @@ set(KERNEL_SOURCES
Graphics/VirtIOGPU/Console.cpp
Graphics/VirtIOGPU/GPU3DDevice.cpp
Graphics/VirtIOGPU/GraphicsAdapter.cpp
Graphics/GenericFramebufferDevice.cpp
SanCov.cpp
Storage/ATA/AHCIController.cpp
Storage/ATA/AHCIPort.cpp

1
Kernel/Graphics/Bochs/GraphicsAdapter.h
View file

@ -10,7 +10,6 @@
#include <Kernel/Bus/PCI/Device.h>
#include <Kernel/Graphics/Bochs/Definitions.h>
#include <Kernel/Graphics/Console/GenericFramebufferConsole.h>
#include <Kernel/Graphics/FramebufferDevice.h>
#include <Kernel/Graphics/GenericGraphicsAdapter.h>
#include <Kernel/Memory/TypedMapping.h>
#include <Kernel/PhysicalAddress.h>

258
Kernel/Graphics/FramebufferDevice.cpp
View file

@ -1,258 +0,0 @@
/*
* Copyright (c) 2021, Liav A. <liavalb@hotmail.co.il>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <AK/Checked.h>
#include <AK/Try.h>
#include <Kernel/API/POSIX/errno.h>
#include <Kernel/Debug.h>
#include <Kernel/Devices/DeviceManagement.h>
#include <Kernel/Graphics/FramebufferDevice.h>
#include <Kernel/Graphics/GraphicsManagement.h>
#include <Kernel/Memory/AnonymousVMObject.h>
#include <Kernel/Memory/MemoryManager.h>
#include <Kernel/Process.h>
#include <Kernel/Sections.h>
#include <LibC/sys/ioctl_numbers.h>
namespace Kernel {
NonnullRefPtr<FramebufferDevice> FramebufferDevice::create(GenericGraphicsAdapter const& adapter, PhysicalAddress paddr, size_t width, size_t height, size_t pitch)
{
auto framebuffer_device_or_error = DeviceManagement::try_create_device<FramebufferDevice>(adapter, paddr, width, height, pitch);
// FIXME: Find a way to propagate errors
VERIFY(!framebuffer_device_or_error.is_error());
return framebuffer_device_or_error.release_value();
}
ErrorOr<Memory::Region*> FramebufferDevice::mmap(Process& process, OpenFileDescription&, Memory::VirtualRange const& range, u64 offset, int prot, bool shared)
{
TRY(process.require_promise(Pledge::video));
SpinlockLocker lock(m_activation_lock);
if (!shared)
return ENODEV;
if (offset != 0)
return ENXIO;
auto framebuffer_length = TRY(buffer_length(0));
framebuffer_length = TRY(Memory::page_round_up(framebuffer_length));
if (range.size() != framebuffer_length)
return EOVERFLOW;
m_userspace_real_framebuffer_vmobject = TRY(Memory::AnonymousVMObject::try_create_for_physical_range(m_framebuffer_address, framebuffer_length));
m_real_framebuffer_vmobject = TRY(Memory::AnonymousVMObject::try_create_for_physical_range(m_framebuffer_address, framebuffer_length));
m_swapped_framebuffer_vmobject = TRY(Memory::AnonymousVMObject::try_create_with_size(framebuffer_length, AllocationStrategy::AllocateNow));
m_real_framebuffer_region = TRY(MM.allocate_kernel_region_with_vmobject(*m_real_framebuffer_vmobject, framebuffer_length, "Framebuffer", Memory::Region::Access::ReadWrite));
m_swapped_framebuffer_region = TRY(MM.allocate_kernel_region_with_vmobject(*m_swapped_framebuffer_vmobject, framebuffer_length, "Framebuffer Swap (Blank)", Memory::Region::Access::ReadWrite));
RefPtr<Memory::VMObject> chosen_vmobject;
if (m_graphical_writes_enabled) {
chosen_vmobject = m_real_framebuffer_vmobject;
} else {
chosen_vmobject = m_swapped_framebuffer_vmobject;
}
m_userspace_framebuffer_region = TRY(process.address_space().allocate_region_with_vmobject(
range,
chosen_vmobject.release_nonnull(),
0,
"Framebuffer",
prot,
shared));
if (m_write_combine) {
if (auto result = m_userspace_framebuffer_region->set_write_combine(true); result.is_error())
dbgln("FramebufferDevice: Failed to enable Write-Combine on Framebuffer: {}", result.error());
}
return m_userspace_framebuffer_region;
}
void FramebufferDevice::deactivate_writes()
{
SpinlockLocker lock(m_activation_lock);
if (!m_userspace_framebuffer_region)
return;
auto framebuffer_length_or_error = buffer_length(0);
VERIFY(!framebuffer_length_or_error.is_error());
size_t rounded_framebuffer_length = Memory::page_round_up(framebuffer_length_or_error.release_value()).release_value_but_fixme_should_propagate_errors();
memcpy(m_swapped_framebuffer_region->vaddr().as_ptr(), m_real_framebuffer_region->vaddr().as_ptr(), rounded_framebuffer_length);
auto vmobject = m_swapped_framebuffer_vmobject;
m_userspace_framebuffer_region->set_vmobject(vmobject.release_nonnull());
m_userspace_framebuffer_region->remap();
m_graphical_writes_enabled = false;
}
void FramebufferDevice::activate_writes()
{
SpinlockLocker lock(m_activation_lock);
if (!m_userspace_framebuffer_region || !m_real_framebuffer_vmobject)
return;
// restore the image we had in the void area
// FIXME: if we happen to have multiple Framebuffers that are writing to that location
// we will experience glitches...
auto framebuffer_length_or_error = buffer_length(0);
VERIFY(!framebuffer_length_or_error.is_error());
size_t rounded_framebuffer_length = Memory::page_round_up(framebuffer_length_or_error.release_value()).release_value_but_fixme_should_propagate_errors();
memcpy(m_real_framebuffer_region->vaddr().as_ptr(), m_swapped_framebuffer_region->vaddr().as_ptr(), rounded_framebuffer_length);
auto vmobject = m_userspace_real_framebuffer_vmobject;
m_userspace_framebuffer_region->set_vmobject(vmobject.release_nonnull());
m_userspace_framebuffer_region->remap();
m_graphical_writes_enabled = true;
}
UNMAP_AFTER_INIT ErrorOr<void> FramebufferDevice::try_to_initialize()
{
// FIXME: Would be nice to be able to unify this with mmap above, but this
// function is UNMAP_AFTER_INIT for the time being.
auto framebuffer_length = TRY(buffer_length(0));
framebuffer_length = TRY(Memory::page_round_up(framebuffer_length));
m_real_framebuffer_vmobject = TRY(Memory::AnonymousVMObject::try_create_for_physical_range(m_framebuffer_address, framebuffer_length));
m_swapped_framebuffer_vmobject = TRY(Memory::AnonymousVMObject::try_create_with_size(framebuffer_length, AllocationStrategy::AllocateNow));
m_real_framebuffer_region = TRY(MM.allocate_kernel_region_with_vmobject(*m_real_framebuffer_vmobject, framebuffer_length, "Framebuffer", Memory::Region::Access::ReadWrite));
m_swapped_framebuffer_region = TRY(MM.allocate_kernel_region_with_vmobject(*m_swapped_framebuffer_vmobject, framebuffer_length, "Framebuffer Swap (Blank)", Memory::Region::Access::ReadWrite));
return {};
}
UNMAP_AFTER_INIT FramebufferDevice::FramebufferDevice(GenericGraphicsAdapter const& adapter, PhysicalAddress addr, size_t width, size_t height, size_t pitch)
: GenericFramebufferDevice(adapter)
, m_framebuffer_address(addr)
, m_framebuffer_pitch(pitch)
, m_framebuffer_width(width)
, m_framebuffer_height(height)
{
VERIFY(!m_framebuffer_address.is_null());
VERIFY(m_framebuffer_pitch);
VERIFY(m_framebuffer_width);
VERIFY(m_framebuffer_height);
dbgln("Framebuffer {}: address={}, pitch={}, width={}, height={}", minor(), addr, pitch, width, height);
}
ErrorOr<size_t> FramebufferDevice::buffer_length(size_t head) const
{
// Note: This FramebufferDevice class doesn't support multihead setup.
// We take care to verify this at the GenericFramebufferDevice::ioctl method
// so if we happen to accidentally have a value different than 0, assert.
VERIFY(head == 0);
SpinlockLocker locker(m_resolution_lock);
auto adapter = m_graphics_adapter.strong_ref();
if (!adapter)
return Error::from_errno(EIO);
if (adapter->double_framebuffering_capable())
return m_framebuffer_pitch * m_framebuffer_height * 2;
return m_framebuffer_pitch * m_framebuffer_height;
}
ErrorOr<size_t> FramebufferDevice::pitch(size_t head) const
{
// Note: This FramebufferDevice class doesn't support multihead setup.
// We take care to verify this at the GenericFramebufferDevice::ioctl method
// so if we happen to accidentally have a value different than 0, assert.
VERIFY(head == 0);
SpinlockLocker locker(m_resolution_lock);
return m_framebuffer_pitch;
}
ErrorOr<size_t> FramebufferDevice::height(size_t head) const
{
// Note: This FramebufferDevice class doesn't support multihead setup.
// We take care to verify this at the GenericFramebufferDevice::ioctl method
// so if we happen to accidentally have a value different than 0, assert.
VERIFY(head == 0);
SpinlockLocker locker(m_resolution_lock);
return m_framebuffer_height;
}
ErrorOr<size_t> FramebufferDevice::width(size_t head) const
{
// Note: This FramebufferDevice class doesn't support multihead setup.
// We take care to verify this at the GenericFramebufferDevice::ioctl method
// so if we happen to accidentally have a value different than 0, assert.
VERIFY(head == 0);
SpinlockLocker locker(m_resolution_lock);
return m_framebuffer_width;
}
ErrorOr<size_t> FramebufferDevice::vertical_offset(size_t head) const
{
// Note: This FramebufferDevice class doesn't support multihead setup.
// We take care to verify this at the GenericFramebufferDevice::ioctl method
// so if we happen to accidentally have a value different than 0, assert.
VERIFY(head == 0);
SpinlockLocker locker(m_buffer_offset_lock);
return m_y_offset;
}
ErrorOr<bool> FramebufferDevice::vertical_offsetted(size_t head) const
{
// Note: This FramebufferDevice class doesn't support multihead setup.
// We take care to verify this at the GenericFramebufferDevice::ioctl method
// so if we happen to accidentally have a value different than 0, assert.
VERIFY(head == 0);
SpinlockLocker locker(m_buffer_offset_lock);
return m_y_offset == 0 ? 0 : 1;
}
ErrorOr<void> FramebufferDevice::set_head_resolution(size_t head, size_t width, size_t height, size_t)
{
// Note: This FramebufferDevice class doesn't support multihead setup.
// We take care to verify this at the GenericFramebufferDevice::ioctl method
// so if we happen to accidentally have a value different than 0, assert.
VERIFY(head == 0);
SpinlockLocker buffer_offset_locker(m_buffer_offset_lock);
SpinlockLocker resolution_locker(m_resolution_lock);
auto adapter = m_graphics_adapter.strong_ref();
if (!adapter)
return Error::from_errno(EIO);
auto result = adapter->try_to_set_resolution(0, width, height);
// FIXME: Find a better way to return here a ErrorOr<void>.
if (!result)
return Error::from_errno(ENOTSUP);
m_framebuffer_width = width;
m_framebuffer_height = height;
m_framebuffer_pitch = width * sizeof(u32);
return {};
}
ErrorOr<void> FramebufferDevice::set_head_buffer(size_t head, bool second_buffer)
{
// Note: This FramebufferDevice class doesn't support multihead setup.
// We take care to verify this at the GenericFramebufferDevice::ioctl method
// so if we happen to accidentally have a value different than 0, assert.
VERIFY(head == 0);
SpinlockLocker locker(m_buffer_offset_lock);
auto adapter = m_graphics_adapter.strong_ref();
if (!adapter)
return Error::from_errno(EIO);
if (second_buffer) {
if (!adapter->set_y_offset(0, m_framebuffer_height)) {
// FIXME: Find a better ErrorOr<void> here.
return Error::from_errno(ENOTSUP);
}
m_y_offset = m_framebuffer_height;
} else {
if (!adapter->set_y_offset(0, 0)) {
// FIXME: Find a better ErrorOr<void> here.
return Error::from_errno(ENOTSUP);
}
m_y_offset = 0;
}
return {};
}
ErrorOr<void> FramebufferDevice::flush_head_buffer(size_t)
{
// Note: This FramebufferDevice class doesn't support flushing.
// We take care to verify this at the GenericFramebufferDevice::ioctl method
// so if we happen to accidentally reach this code, assert.
VERIFY_NOT_REACHED();
}
ErrorOr<void> FramebufferDevice::flush_rectangle(size_t, FBRect const&)
{
// Note: This FramebufferDevice class doesn't support partial flushing.
// We take care to verify this at the GenericFramebufferDevice::ioctl method
// so if we happen to accidentally reach this code, assert.
VERIFY_NOT_REACHED();
}
ErrorOr<ByteBuffer> FramebufferDevice::get_edid(size_t head) const
{
auto adapter = m_graphics_adapter.strong_ref();
if (!adapter)
return Error::from_errno(EIO);
return adapter->get_edid(head);
}
}

77
Kernel/Graphics/FramebufferDevice.h
View file

@ -1,77 +0,0 @@
/*
* Copyright (c) 2021, Liav A. <liavalb@hotmail.co.il>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/NonnullOwnPtr.h>
#include <AK/Types.h>
#include <Kernel/Graphics/GenericFramebufferDevice.h>
#include <Kernel/Graphics/GenericGraphicsAdapter.h>
#include <Kernel/Locking/Spinlock.h>
#include <Kernel/Memory/AnonymousVMObject.h>
#include <Kernel/PhysicalAddress.h>
namespace Kernel {
class FramebufferDevice final : public GenericFramebufferDevice {
friend class DeviceManagement;
public:
static NonnullRefPtr<FramebufferDevice> create(GenericGraphicsAdapter const&, PhysicalAddress, size_t, size_t, size_t);
virtual ErrorOr<Memory::Region*> mmap(Process&, OpenFileDescription&, Memory::VirtualRange const&, u64 offset, int prot, bool shared) override;
virtual void deactivate_writes() override;
virtual void activate_writes() override;
virtual ErrorOr<void> try_to_initialize() override;
virtual bool multihead_support() const override { return false; }
virtual bool flushing_support() const override { return false; }
virtual bool partial_flushing_support() const override { return false; }
virtual size_t heads_count() const override { return 1; }
virtual ErrorOr<size_t> buffer_length(size_t head) const override;
virtual ErrorOr<size_t> pitch(size_t head) const override;
virtual ErrorOr<size_t> height(size_t head) const override;
virtual ErrorOr<size_t> width(size_t head) const override;
virtual ErrorOr<size_t> vertical_offset(size_t head) const override;
virtual ErrorOr<bool> vertical_offsetted(size_t head) const override;
virtual ErrorOr<ByteBuffer> get_edid(size_t head) const override;
void enable_write_combine(bool write_combine) { m_write_combine = write_combine; }
private:
virtual ErrorOr<void> set_head_resolution(size_t head, size_t width, size_t height, size_t pitch) override;
virtual ErrorOr<void> set_head_buffer(size_t head, bool second_buffer) override;
virtual ErrorOr<void> flush_head_buffer(size_t head) override;
virtual ErrorOr<void> flush_rectangle(size_t head, FBRect const&) override;
FramebufferDevice(GenericGraphicsAdapter const&, PhysicalAddress, size_t, size_t, size_t);
PhysicalAddress m_framebuffer_address;
size_t m_framebuffer_pitch { 0 };
size_t m_framebuffer_width { 0 };
size_t m_framebuffer_height { 0 };
Spinlock m_activation_lock;
mutable Spinlock m_buffer_offset_lock;
RefPtr<Memory::AnonymousVMObject> m_real_framebuffer_vmobject;
RefPtr<Memory::AnonymousVMObject> m_swapped_framebuffer_vmobject;
OwnPtr<Memory::Region> m_real_framebuffer_region;
OwnPtr<Memory::Region> m_swapped_framebuffer_region;
bool m_graphical_writes_enabled { true };
bool m_write_combine { true };
RefPtr<Memory::AnonymousVMObject> m_userspace_real_framebuffer_vmobject;
Memory::Region* m_userspace_framebuffer_region { nullptr };
size_t m_y_offset { 0 };
};
}

158
Kernel/Graphics/GenericFramebufferDevice.cpp
View file

@ -1,158 +0,0 @@
/*
* Copyright (c) 2021, Liav A. <liavalb@hotmail.co.il>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <AK/Checked.h>
#include <AK/Try.h>
#include <Kernel/API/POSIX/errno.h>
#include <Kernel/Debug.h>
#include <Kernel/Devices/DeviceManagement.h>
#include <Kernel/Graphics/FramebufferDevice.h>
#include <Kernel/Graphics/GraphicsManagement.h>
#include <Kernel/Memory/AnonymousVMObject.h>
#include <Kernel/Memory/MemoryManager.h>
#include <Kernel/Process.h>
#include <Kernel/Sections.h>
#include <Kernel/StdLib.h>
#define MAX_RESOLUTION_WIDTH 4096
#define MAX_RESOLUTION_HEIGHT 2160
namespace Kernel {
ErrorOr<void> GenericFramebufferDevice::verify_head_index(int head_index) const
{
if (head_index < 0)
return Error::from_errno(EINVAL);
if (!multihead_support() && head_index > 0)
return Error::from_errno(ENOTSUP);
return {};
}
ErrorOr<void> GenericFramebufferDevice::ioctl(OpenFileDescription&, unsigned request, Userspace<void*> arg)
{
if (request != GRAPHICS_IOCTL_GET_HEAD_EDID) {
// Allow anyone to query the EDID. Eventually we'll publish the current EDID on /sys
// so it doesn't really make sense to require the video pledge to query it.
TRY(Process::current().require_promise(Pledge::video));
}
switch (request) {
case GRAPHICS_IOCTL_GET_PROPERTIES: {
auto user_properties = static_ptr_cast<GraphicsConnectorProperties*>(arg);
GraphicsConnectorProperties properties {};
auto adapter = m_graphics_adapter.strong_ref();
if (!adapter)
return Error::from_errno(EIO);
properties.multihead_support = multihead_support();
properties.flushing_support = flushing_support();
properties.doublebuffer_support = adapter->double_framebuffering_capable();
properties.partial_flushing_support = partial_flushing_support();
return copy_to_user(user_properties, &properties);
}
case GRAPHICS_IOCTL_GET_HEAD_PROPERTIES: {
auto user_head_properties = static_ptr_cast<FBHeadProperties*>(arg);
FBHeadProperties head_properties {};
TRY(copy_from_user(&head_properties, user_head_properties));
TRY(verify_head_index(head_properties.head_index));
head_properties.pitch = TRY(pitch(head_properties.head_index));
head_properties.width = TRY(width(head_properties.head_index));
head_properties.height = TRY(height(head_properties.head_index));
head_properties.buffer_length = TRY(buffer_length(head_properties.head_index));
head_properties.offset = TRY(vertical_offset(head_properties.head_index));
return copy_to_user(user_head_properties, &head_properties);
}
case GRAPHICS_IOCTL_GET_HEAD_EDID: {
auto user_head_edid = static_ptr_cast<GraphicsHeadEDID*>(arg);
GraphicsHeadEDID head_edid {};
TRY(copy_from_user(&head_edid, user_head_edid));
TRY(verify_head_index(head_edid.head_index));
auto edid_bytes = TRY(get_edid(head_edid.head_index));
if (head_edid.bytes != nullptr) {
// Only return the EDID if a buffer was provided. Either way,
// we'll write back the bytes_size with the actual size
if (head_edid.bytes_size < edid_bytes.size()) {
head_edid.bytes_size = edid_bytes.size();
TRY(copy_to_user(user_head_edid, &head_edid));
return Error::from_errno(EOVERFLOW);
}
TRY(copy_to_user(head_edid.bytes, (void const*)edid_bytes.data(), edid_bytes.size()));
}
head_edid.bytes_size = edid_bytes.size();
return copy_to_user(user_head_edid, &head_edid);
}
case GRAPHICS_IOCTL_SET_HEAD_RESOLUTION: {
auto user_head_resolution = static_ptr_cast<FBHeadResolution const*>(arg);
auto head_resolution = TRY(copy_typed_from_user(user_head_resolution));
TRY(verify_head_index(head_resolution.head_index));
if (head_resolution.pitch < 0)
return Error::from_errno(EINVAL);
if (head_resolution.width < 0)
return Error::from_errno(EINVAL);
if (head_resolution.height < 0)
return Error::from_errno(EINVAL);
TRY(set_head_resolution(head_resolution.head_index, head_resolution.width, head_resolution.height, head_resolution.pitch));
return {};
}
case GRAPHICS_IOCTL_SET_HEAD_VERTICAL_OFFSET_BUFFER: {
auto user_head_vertical_buffer_offset = static_ptr_cast<GraphicsHeadVerticalOffset const*>(arg);
auto head_vertical_buffer_offset = TRY(copy_typed_from_user(user_head_vertical_buffer_offset));
TRY(verify_head_index(head_vertical_buffer_offset.head_index));
if (head_vertical_buffer_offset.offsetted < 0 || head_vertical_buffer_offset.offsetted > 1)
return Error::from_errno(EINVAL);
TRY(set_head_buffer(head_vertical_buffer_offset.head_index, head_vertical_buffer_offset.offsetted));
return {};
}
case GRAPHICS_IOCTL_GET_HEAD_VERTICAL_OFFSET_BUFFER: {
auto user_head_vertical_buffer_offset = static_ptr_cast<GraphicsHeadVerticalOffset*>(arg);
GraphicsHeadVerticalOffset head_vertical_buffer_offset {};
TRY(copy_from_user(&head_vertical_buffer_offset, user_head_vertical_buffer_offset));
TRY(verify_head_index(head_vertical_buffer_offset.head_index));
head_vertical_buffer_offset.offsetted = TRY(vertical_offsetted(head_vertical_buffer_offset.head_index));
return copy_to_user(user_head_vertical_buffer_offset, &head_vertical_buffer_offset);
}
case GRAPHICS_IOCTL_FLUSH_HEAD_BUFFERS: {
if (!partial_flushing_support())
return Error::from_errno(ENOTSUP);
auto user_flush_rects = static_ptr_cast<FBFlushRects const*>(arg);
auto flush_rects = TRY(copy_typed_from_user(user_flush_rects));
if (Checked<unsigned>::multiplication_would_overflow(flush_rects.count, sizeof(FBRect)))
return Error::from_errno(EFAULT);
SpinlockLocker locker(m_flushing_lock);
if (flush_rects.count > 0) {
for (unsigned i = 0; i < flush_rects.count; i++) {
FBRect user_dirty_rect;
TRY(copy_from_user(&user_dirty_rect, &flush_rects.rects[i]));
TRY(flush_rectangle(flush_rects.buffer_index, user_dirty_rect));
}
}
return {};
};
case GRAPHICS_IOCTL_FLUSH_HEAD: {
if (!flushing_support())
return Error::from_errno(ENOTSUP);
// Note: We accept a FBRect, but we only really care about the head_index value.
auto user_rect = static_ptr_cast<FBRect const*>(arg);
auto rect = TRY(copy_typed_from_user(user_rect));
TRY(verify_head_index(rect.head_index));
TRY(flush_head_buffer(rect.head_index));
return {};
}
default:
return EINVAL;
};
}
GenericFramebufferDevice::GenericFramebufferDevice(GenericGraphicsAdapter const& adapter)
: BlockDevice(29, GraphicsManagement::the().allocate_minor_device_number())
, m_graphics_adapter(adapter)
{
}
}

70
Kernel/Graphics/GenericFramebufferDevice.h
View file

@ -1,70 +0,0 @@
/*
* Copyright (c) 2021, Liav A. <liavalb@hotmail.co.il>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/Error.h>
#include <AK/Types.h>
#include <Kernel/Devices/BlockDevice.h>
#include <Kernel/Graphics/GenericGraphicsAdapter.h>
#include <Kernel/Locking/Spinlock.h>
#include <LibC/sys/ioctl_numbers.h>
namespace Kernel {
class GenericFramebufferDevice : public BlockDevice {
friend class DeviceManagement;
public:
virtual ErrorOr<void> try_to_initialize() = 0;
virtual void deactivate_writes() = 0;
virtual void activate_writes() = 0;
virtual ~GenericFramebufferDevice() = default;
// ^File
virtual ErrorOr<Memory::Region*> mmap(Process&, OpenFileDescription&, Memory::VirtualRange const&, u64 offset, int prot, bool shared) override = 0;
virtual ErrorOr<void> ioctl(OpenFileDescription&, unsigned request, Userspace<void*> arg) override final;
virtual StringView class_name() const override final { return "FramebufferDevice"sv; }
private:
// ^File
virtual bool can_read(OpenFileDescription const&, u64) const override final { return true; }
virtual bool can_write(OpenFileDescription const&, u64) const override final { return true; }
virtual void start_request(AsyncBlockDeviceRequest& request) override final { request.complete(AsyncDeviceRequest::Failure); }
virtual ErrorOr<size_t> read(OpenFileDescription&, u64, UserOrKernelBuffer&, size_t) override { return EINVAL; }
virtual ErrorOr<size_t> write(OpenFileDescription&, u64, UserOrKernelBuffer const&, size_t) override { return EINVAL; }
protected:
virtual bool multihead_support() const = 0;
virtual bool flushing_support() const = 0;
virtual bool partial_flushing_support() const = 0;
virtual size_t heads_count() const = 0;
virtual ErrorOr<size_t> buffer_length(size_t head) const = 0;
virtual ErrorOr<size_t> pitch(size_t head) const = 0;
virtual ErrorOr<size_t> height(size_t head) const = 0;
virtual ErrorOr<size_t> width(size_t head) const = 0;
virtual ErrorOr<size_t> vertical_offset(size_t head) const = 0;
virtual ErrorOr<bool> vertical_offsetted(size_t head) const = 0;
virtual ErrorOr<void> set_head_resolution(size_t head, size_t width, size_t height, size_t pitch) = 0;
virtual ErrorOr<void> set_head_buffer(size_t head, bool second_buffer) = 0;
virtual ErrorOr<void> flush_head_buffer(size_t head) = 0;
// FIXME: This method is too much specific to the VirtIO implementation (especially the buffer_index parameter)
virtual ErrorOr<void> flush_rectangle(size_t buffer_index, FBRect const&) = 0;
virtual ErrorOr<ByteBuffer> get_edid(size_t head) const = 0;
ErrorOr<void> verify_head_index(int head_index) const;
GenericFramebufferDevice(GenericGraphicsAdapter const&);
mutable WeakPtr<GenericGraphicsAdapter> m_graphics_adapter;
mutable Spinlock m_flushing_lock;
mutable Spinlock m_resolution_lock;
};
}

1
Kernel/Graphics/VGA/ISAAdapter.h
View file

@ -9,7 +9,6 @@
#include <AK/Types.h>
#include <Kernel/Bus/PCI/Device.h>
#include <Kernel/Graphics/Console/Console.h>
#include <Kernel/Graphics/FramebufferDevice.h>
#include <Kernel/Graphics/GenericGraphicsAdapter.h>
#include <Kernel/Graphics/VGA/VGACompatibleAdapter.h>
#include <Kernel/PhysicalAddress.h>

1
Kernel/Graphics/VGA/PCIAdapter.h
View file

@ -9,7 +9,6 @@
#include <AK/Types.h>
#include <Kernel/Bus/PCI/Device.h>
#include <Kernel/Graphics/Console/Console.h>
#include <Kernel/Graphics/FramebufferDevice.h>
#include <Kernel/Graphics/GenericGraphicsAdapter.h>
#include <Kernel/PhysicalAddress.h>