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serenity/Kernel/Graphics/VirtIOGPU/GraphicsAdapter.cpp
Liav A efae6e2270 Kernel/Graphics: Propagate errors properly around in the VirtIO driver 
This happens to be a sad truth for the VirtIOGPU driver - it lacked any
error propagation measures and generally relied on clunky assumptions
that most operations with the GPU device are infallible, although in
reality much of them could fail, so we do need to handle errors.

To fix this, synchronous GPU commands no longer rely on the wait queue
mechanism anymore, so instead we introduce a timeout-based mechanism,
similar to how other Kernel drivers use a polling based mechanism with
the assumption that hardware could get stuck in an error state and we
could abort gracefully.

Then, we change most of the VirtIOGraphicsAdapter methods to propagate
errors properly to the original callers, to ensure that if a synchronous
GPU command failed, either the Kernel or userspace could do something
meaningful about this situation.
2022-12-19 10:19:57 +00:00

555 lines
27 KiB
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/*
* Copyright (c) 2021, Sahan Fernando <sahan.h.fernando@gmail.com>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <AK/BinaryBufferWriter.h>
#include <Kernel/Arch/Delay.h>
#include <Kernel/Bus/PCI/API.h>
#include <Kernel/Bus/PCI/IDs.h>
#include <Kernel/Devices/DeviceManagement.h>
#include <Kernel/Graphics/Console/GenericFramebufferConsole.h>
#include <Kernel/Graphics/GraphicsManagement.h>
#include <Kernel/Graphics/VirtIOGPU/Console.h>
#include <Kernel/Graphics/VirtIOGPU/DisplayConnector.h>
#include <Kernel/Graphics/VirtIOGPU/GPU3DDevice.h>
#include <Kernel/Graphics/VirtIOGPU/GraphicsAdapter.h>
namespace Kernel {
#define DEVICE_EVENTS_READ 0x0
#define DEVICE_EVENTS_CLEAR 0x4
#define DEVICE_NUM_SCANOUTS 0x8
NonnullLockRefPtr<VirtIOGraphicsAdapter> VirtIOGraphicsAdapter::initialize(PCI::DeviceIdentifier const& device_identifier)
{
VERIFY(device_identifier.hardware_id().vendor_id == PCI::VendorID::VirtIO);
// Setup memory transfer region
auto scratch_space_region = MUST(MM.allocate_contiguous_kernel_region(
32 * PAGE_SIZE,
"VirtGPU Scratch Space"sv,
Memory::Region::Access::ReadWrite));
auto active_context_ids = Bitmap::must_create(VREND_MAX_CTX, false);
auto adapter = adopt_lock_ref(*new (nothrow) VirtIOGraphicsAdapter(device_identifier, move(active_context_ids), move(scratch_space_region)));
adapter->initialize();
MUST(adapter->initialize_adapter());
return adapter;
}
ErrorOr<void> VirtIOGraphicsAdapter::initialize_adapter()
{
VERIFY(m_num_scanouts <= VIRTIO_GPU_MAX_SCANOUTS);
TRY(initialize_3d_device());
for (size_t index = 0; index < m_num_scanouts; index++) {
auto display_connector = VirtIODisplayConnector::must_create(*this, index);
m_scanouts[index].display_connector = display_connector;
MUST(query_and_set_edid(index, *display_connector));
display_connector->set_safe_mode_setting_after_initialization({});
}
return {};
}
ErrorOr<void> VirtIOGraphicsAdapter::mode_set_resolution(Badge<VirtIODisplayConnector>, VirtIODisplayConnector& connector, size_t width, size_t height)
{
SpinlockLocker locker(m_operation_lock);
VERIFY(connector.scanout_id() < VIRTIO_GPU_MAX_SCANOUTS);
auto rounded_buffer_size = TRY(calculate_framebuffer_size(width, height));
TRY(attach_physical_range_to_framebuffer(connector, true, 0, rounded_buffer_size));
return {};
}
void VirtIOGraphicsAdapter::set_dirty_displayed_rect(Badge<VirtIODisplayConnector>, VirtIODisplayConnector& connector, Graphics::VirtIOGPU::Protocol::Rect const& dirty_rect, bool main_buffer)
{
VERIFY(m_operation_lock.is_locked());
VERIFY(connector.scanout_id() < VIRTIO_GPU_MAX_SCANOUTS);
Scanout::PhysicalBuffer& buffer = main_buffer ? m_scanouts[connector.scanout_id().value()].main_buffer : m_scanouts[connector.scanout_id().value()].back_buffer;
if (buffer.dirty_rect.width == 0 || buffer.dirty_rect.height == 0) {
buffer.dirty_rect = dirty_rect;
} else {
auto current_dirty_right = buffer.dirty_rect.x + buffer.dirty_rect.width;
auto current_dirty_bottom = buffer.dirty_rect.y + buffer.dirty_rect.height;
buffer.dirty_rect.x = min(buffer.dirty_rect.x, dirty_rect.x);
buffer.dirty_rect.y = min(buffer.dirty_rect.y, dirty_rect.y);
buffer.dirty_rect.width = max(current_dirty_right, dirty_rect.x + dirty_rect.width) - buffer.dirty_rect.x;
buffer.dirty_rect.height = max(current_dirty_bottom, dirty_rect.y + dirty_rect.height) - buffer.dirty_rect.y;
}
}
ErrorOr<void> VirtIOGraphicsAdapter::flush_displayed_image(Badge<VirtIODisplayConnector>, VirtIODisplayConnector& connector, Graphics::VirtIOGPU::Protocol::Rect const& dirty_rect, bool main_buffer)
{
VERIFY(m_operation_lock.is_locked());
VERIFY(connector.scanout_id() < VIRTIO_GPU_MAX_SCANOUTS);
Scanout::PhysicalBuffer& buffer = main_buffer ? m_scanouts[connector.scanout_id().value()].main_buffer : m_scanouts[connector.scanout_id().value()].back_buffer;
TRY(flush_displayed_image(buffer.resource_id, dirty_rect));
buffer.dirty_rect = {};
return {};
}
ErrorOr<void> VirtIOGraphicsAdapter::transfer_framebuffer_data_to_host(Badge<VirtIODisplayConnector>, VirtIODisplayConnector& connector, Graphics::VirtIOGPU::Protocol::Rect const& rect, bool main_buffer)
{
VERIFY(m_operation_lock.is_locked());
VERIFY(connector.scanout_id() < VIRTIO_GPU_MAX_SCANOUTS);
Scanout::PhysicalBuffer& buffer = main_buffer ? m_scanouts[connector.scanout_id().value()].main_buffer : m_scanouts[connector.scanout_id().value()].back_buffer;
TRY(transfer_framebuffer_data_to_host(connector.scanout_id(), buffer.resource_id, rect));
return {};
}
ErrorOr<void> VirtIOGraphicsAdapter::attach_physical_range_to_framebuffer(VirtIODisplayConnector& connector, bool main_buffer, size_t framebuffer_offset, size_t framebuffer_size)
{
VERIFY(m_operation_lock.is_locked());
Scanout::PhysicalBuffer& buffer = main_buffer ? m_scanouts[connector.scanout_id().value()].main_buffer : m_scanouts[connector.scanout_id().value()].back_buffer;
buffer.framebuffer_offset = framebuffer_offset;
// 1. Create BUFFER using VIRTIO_GPU_CMD_RESOURCE_CREATE_2D
if (buffer.resource_id.value() != 0) {
// FIXME: Do we need to remove the resource regardless of this condition?
// Do we need to remove it if any of the code below fails for some reason?
TRY(delete_resource(buffer.resource_id));
}
auto display_info = connector.display_information({});
buffer.resource_id = TRY(create_2d_resource(display_info.rect));
// 2. Attach backing storage using VIRTIO_GPU_CMD_RESOURCE_ATTACH_BACKING
TRY(ensure_backing_storage(buffer.resource_id, connector.framebuffer_region(), buffer.framebuffer_offset, framebuffer_size));
// 3. Use VIRTIO_GPU_CMD_SET_SCANOUT to link the framebuffer to a display scanout.
TRY(set_scanout_resource(connector.scanout_id(), buffer.resource_id, display_info.rect));
// 4. Render our test pattern
connector.draw_ntsc_test_pattern({});
// 5. Use VIRTIO_GPU_CMD_TRANSFER_TO_HOST_2D to update the host resource from guest memory.
TRY(transfer_framebuffer_data_to_host(connector.scanout_id(), buffer.resource_id, display_info.rect));
// 6. Use VIRTIO_GPU_CMD_RESOURCE_FLUSH to flush the updated resource to the display.
TRY(flush_displayed_image(buffer.resource_id, display_info.rect));
// Make sure we constrain the existing dirty rect (if any)
if (buffer.dirty_rect.width != 0 || buffer.dirty_rect.height != 0) {
auto dirty_right = buffer.dirty_rect.x + buffer.dirty_rect.width;
auto dirty_bottom = buffer.dirty_rect.y + buffer.dirty_rect.height;
buffer.dirty_rect.width = min(dirty_right, display_info.rect.x + display_info.rect.width) - buffer.dirty_rect.x;
buffer.dirty_rect.height = min(dirty_bottom, display_info.rect.y + display_info.rect.height) - buffer.dirty_rect.y;
}
return {};
}
VirtIOGraphicsAdapter::VirtIOGraphicsAdapter(PCI::DeviceIdentifier const& device_identifier, Bitmap&& active_context_ids, NonnullOwnPtr<Memory::Region> scratch_space_region)
: VirtIO::Device(device_identifier)
, m_scratch_space(move(scratch_space_region))
{
m_active_context_ids.with([&](Bitmap& my_active_context_ids) {
my_active_context_ids = move(active_context_ids);
// Note: Context ID 0 is invalid, so mark it as in use.
my_active_context_ids.set(0, true);
});
}
void VirtIOGraphicsAdapter::initialize()
{
VirtIO::Device::initialize();
if (auto* config = get_config(VirtIO::ConfigurationType::Device)) {
m_device_configuration = config;
bool success = negotiate_features([&](u64 supported_features) {
u64 negotiated = 0;
if (is_feature_set(supported_features, VIRTIO_GPU_F_VIRGL)) {
dbgln_if(VIRTIO_DEBUG, "VirtIO::GraphicsAdapter: VirGL is available, enabling");
negotiated |= VIRTIO_GPU_F_VIRGL;
m_has_virgl_support = true;
}
if (is_feature_set(supported_features, VIRTIO_GPU_F_EDID))
negotiated |= VIRTIO_GPU_F_EDID;
return negotiated;
});
if (success) {
read_config_atomic([&]() {
m_num_scanouts = config_read32(*config, DEVICE_NUM_SCANOUTS);
});
dbgln_if(VIRTIO_DEBUG, "VirtIO::GraphicsAdapter: num_scanouts: {}", m_num_scanouts);
success = setup_queues(2); // CONTROLQ + CURSORQ
}
VERIFY(success);
finish_init();
} else {
VERIFY_NOT_REACHED();
}
}
bool VirtIOGraphicsAdapter::handle_device_config_change()
{
auto events = get_pending_events();
if (events & VIRTIO_GPU_EVENT_DISPLAY) {
// The host window was resized, in SerenityOS we completely ignore this event
dbgln_if(VIRTIO_DEBUG, "VirtIO::GraphicsAdapter: Ignoring virtio gpu display resize event");
clear_pending_events(VIRTIO_GPU_EVENT_DISPLAY);
}
if (events & ~VIRTIO_GPU_EVENT_DISPLAY) {
dbgln("VirtIO::GraphicsAdapter: Got unknown device config change event: {:#x}", events);
return false;
}
return true;
}
void VirtIOGraphicsAdapter::handle_queue_update(u16)
{
}
u32 VirtIOGraphicsAdapter::get_pending_events()
{
return config_read32(*m_device_configuration, DEVICE_EVENTS_READ);
}
void VirtIOGraphicsAdapter::clear_pending_events(u32 event_bitmask)
{
config_write32(*m_device_configuration, DEVICE_EVENTS_CLEAR, event_bitmask);
}
static void populate_virtio_gpu_request_header(Graphics::VirtIOGPU::Protocol::ControlHeader& header, Graphics::VirtIOGPU::Protocol::CommandType ctrl_type, u32 flags)
{
header.type = to_underlying(ctrl_type);
header.flags = flags;
header.fence_id = 0;
header.context_id = 0;
header.padding = 0;
}
ErrorOr<void> VirtIOGraphicsAdapter::query_and_set_edid(u32 scanout_id, VirtIODisplayConnector& display_connector)
{
SpinlockLocker locker(m_operation_lock);
if (!is_feature_accepted(VIRTIO_GPU_F_EDID))
return Error::from_errno(ENOTSUP);
auto writer = create_scratchspace_writer();
auto& request = writer.append_structure<Graphics::VirtIOGPU::Protocol::GetEDID>();
auto& response = writer.append_structure<Graphics::VirtIOGPU::Protocol::GetEDIDResponse>();
populate_virtio_gpu_request_header(request.header, Graphics::VirtIOGPU::Protocol::CommandType::VIRTIO_GPU_CMD_GET_EDID, 0);
request.scanout_id = scanout_id;
request.padding = 0;
TRY(synchronous_virtio_gpu_command(100, start_of_scratch_space(), sizeof(request), sizeof(response)));
if (response.header.type != to_underlying(Graphics::VirtIOGPU::Protocol::CommandType::VIRTIO_GPU_RESP_OK_EDID))
return Error::from_string_literal("VirtIO::GraphicsAdapter: Failed to get EDID");
if (response.size == 0)
return Error::from_string_literal("VirtIO::GraphicsAdapter: Failed to get EDID, empty buffer");
Array<u8, 128> raw_edid;
memcpy(raw_edid.data(), response.edid, min(sizeof(raw_edid), response.size));
display_connector.set_edid_bytes({}, raw_edid);
return {};
}
ErrorOr<Graphics::VirtIOGPU::ResourceID> VirtIOGraphicsAdapter::create_2d_resource(Graphics::VirtIOGPU::Protocol::Rect rect)
{
VERIFY(m_operation_lock.is_locked());
auto writer = create_scratchspace_writer();
auto& request = writer.append_structure<Graphics::VirtIOGPU::Protocol::ResourceCreate2D>();
auto& response = writer.append_structure<Graphics::VirtIOGPU::Protocol::ControlHeader>();
populate_virtio_gpu_request_header(request.header, Graphics::VirtIOGPU::Protocol::CommandType::VIRTIO_GPU_CMD_RESOURCE_CREATE_2D, 0);
auto resource_id = allocate_resource_id();
request.resource_id = resource_id.value();
request.width = rect.width;
request.height = rect.height;
request.format = to_underlying(Graphics::VirtIOGPU::Protocol::TextureFormat::VIRTIO_GPU_FORMAT_B8G8R8X8_UNORM);
TRY(synchronous_virtio_gpu_command(100, start_of_scratch_space(), sizeof(request), sizeof(response)));
if (response.type == to_underlying(Graphics::VirtIOGPU::Protocol::CommandType::VIRTIO_GPU_RESP_OK_NODATA)) {
dbgln_if(VIRTIO_DEBUG, "VirtIO::GraphicsAdapter: Allocated 2d resource with id {}", resource_id.value());
return resource_id;
}
return EIO;
}
ErrorOr<Graphics::VirtIOGPU::ResourceID> VirtIOGraphicsAdapter::create_3d_resource(Graphics::VirtIOGPU::Protocol::Resource3DSpecification const& resource_3d_specification)
{
VERIFY(m_operation_lock.is_locked());
auto writer = create_scratchspace_writer();
auto& request = writer.append_structure<Graphics::VirtIOGPU::Protocol::ResourceCreate3D>();
auto& response = writer.append_structure<Graphics::VirtIOGPU::Protocol::ControlHeader>();
populate_virtio_gpu_request_header(request.header, Graphics::VirtIOGPU::Protocol::CommandType::VIRTIO_GPU_CMD_RESOURCE_CREATE_3D, 0);
// FIXME: What would be an appropriate resource free-ing mechanism to use in case anything
// after this fails?
auto resource_id = allocate_resource_id();
request.resource_id = resource_id.value();
// TODO: Abstract this out a bit more
u32* start_of_copied_fields = &request.target;
// Validate that the sub copy from the resource_3d_specification to the offset of the request fits.
static_assert((sizeof(request) - offsetof(Graphics::VirtIOGPU::Protocol::ResourceCreate3D, target) == sizeof(resource_3d_specification)));
memcpy(start_of_copied_fields, &resource_3d_specification, sizeof(resource_3d_specification));
TRY(synchronous_virtio_gpu_command(100, start_of_scratch_space(), sizeof(request), sizeof(response)));
if (response.type == to_underlying(Graphics::VirtIOGPU::Protocol::CommandType::VIRTIO_GPU_RESP_OK_NODATA)) {
dbgln_if(VIRTIO_DEBUG, "VirtIO::GraphicsAdapter: Allocated 3d resource with id {}", resource_id.value());
return resource_id;
}
return EIO;
}
ErrorOr<void> VirtIOGraphicsAdapter::ensure_backing_storage(Graphics::VirtIOGPU::ResourceID resource_id, Memory::Region const& region, size_t buffer_offset, size_t buffer_length)
{
VERIFY(m_operation_lock.is_locked());
VERIFY(buffer_offset % PAGE_SIZE == 0);
VERIFY(buffer_length % PAGE_SIZE == 0);
auto first_page_index = buffer_offset / PAGE_SIZE;
size_t num_mem_regions = buffer_length / PAGE_SIZE;
auto writer = create_scratchspace_writer();
auto& request = writer.append_structure<Graphics::VirtIOGPU::Protocol::ResourceAttachBacking>();
const size_t header_block_size = sizeof(request) + num_mem_regions * sizeof(Graphics::VirtIOGPU::Protocol::MemoryEntry);
populate_virtio_gpu_request_header(request.header, Graphics::VirtIOGPU::Protocol::CommandType::VIRTIO_GPU_CMD_RESOURCE_ATTACH_BACKING, 0);
request.resource_id = resource_id.value();
request.num_entries = num_mem_regions;
for (size_t i = 0; i < num_mem_regions; ++i) {
auto& memory_entry = writer.append_structure<Graphics::VirtIOGPU::Protocol::MemoryEntry>();
memory_entry.address = region.physical_page(first_page_index + i)->paddr().get();
memory_entry.length = PAGE_SIZE;
}
auto& response = writer.append_structure<Graphics::VirtIOGPU::Protocol::ControlHeader>();
TRY(synchronous_virtio_gpu_command(100, start_of_scratch_space(), header_block_size, sizeof(response)));
if (response.type == to_underlying(Graphics::VirtIOGPU::Protocol::CommandType::VIRTIO_GPU_RESP_OK_NODATA)) {
dbgln_if(VIRTIO_DEBUG, "VirtIO::GraphicsAdapter: Allocated backing storage");
return {};
}
return EIO;
}
ErrorOr<void> VirtIOGraphicsAdapter::detach_backing_storage(Graphics::VirtIOGPU::ResourceID resource_id)
{
VERIFY(m_operation_lock.is_locked());
auto writer = create_scratchspace_writer();
auto& request = writer.append_structure<Graphics::VirtIOGPU::Protocol::ResourceDetachBacking>();
auto& response = writer.append_structure<Graphics::VirtIOGPU::Protocol::ControlHeader>();
populate_virtio_gpu_request_header(request.header, Graphics::VirtIOGPU::Protocol::CommandType::VIRTIO_GPU_CMD_RESOURCE_DETACH_BACKING, 0);
request.resource_id = resource_id.value();
TRY(synchronous_virtio_gpu_command(100, start_of_scratch_space(), sizeof(request), sizeof(response)));
if (response.type == to_underlying(Graphics::VirtIOGPU::Protocol::CommandType::VIRTIO_GPU_RESP_OK_NODATA)) {
dbgln_if(VIRTIO_DEBUG, "VirtIO::GraphicsAdapter: Detached backing storage");
return {};
}
return EIO;
}
ErrorOr<void> VirtIOGraphicsAdapter::set_scanout_resource(Graphics::VirtIOGPU::ScanoutID scanout, Graphics::VirtIOGPU::ResourceID resource_id, Graphics::VirtIOGPU::Protocol::Rect rect)
{
VERIFY(m_operation_lock.is_locked());
// We need to scope the request/response here so that we can query display information later on
auto writer = create_scratchspace_writer();
auto& request = writer.append_structure<Graphics::VirtIOGPU::Protocol::SetScanOut>();
auto& response = writer.append_structure<Graphics::VirtIOGPU::Protocol::ControlHeader>();
populate_virtio_gpu_request_header(request.header, Graphics::VirtIOGPU::Protocol::CommandType::VIRTIO_GPU_CMD_SET_SCANOUT, 0);
request.resource_id = resource_id.value();
request.scanout_id = scanout.value();
request.rect = rect;
TRY(synchronous_virtio_gpu_command(100, start_of_scratch_space(), sizeof(request), sizeof(response)));
if (response.type == to_underlying(Graphics::VirtIOGPU::Protocol::CommandType::VIRTIO_GPU_RESP_OK_NODATA)) {
dbgln_if(VIRTIO_DEBUG, "VirtIO::GraphicsAdapter: Set backing scanout");
return {};
}
return EIO;
}
ErrorOr<void> VirtIOGraphicsAdapter::transfer_framebuffer_data_to_host(Graphics::VirtIOGPU::ScanoutID scanout, Graphics::VirtIOGPU::ResourceID resource_id, Graphics::VirtIOGPU::Protocol::Rect const& dirty_rect)
{
VERIFY(m_operation_lock.is_locked());
auto writer = create_scratchspace_writer();
auto& request = writer.append_structure<Graphics::VirtIOGPU::Protocol::TransferToHost2D>();
auto& response = writer.append_structure<Graphics::VirtIOGPU::Protocol::ControlHeader>();
populate_virtio_gpu_request_header(request.header, Graphics::VirtIOGPU::Protocol::CommandType::VIRTIO_GPU_CMD_TRANSFER_TO_HOST_2D, 0);
request.offset = (dirty_rect.x + (dirty_rect.y * m_scanouts[scanout.value()].display_connector->display_information({}).rect.width)) * sizeof(u32);
request.resource_id = resource_id.value();
request.rect = dirty_rect;
TRY(synchronous_virtio_gpu_command(100, start_of_scratch_space(), sizeof(request), sizeof(response)));
if (response.type == to_underlying(Graphics::VirtIOGPU::Protocol::CommandType::VIRTIO_GPU_RESP_OK_NODATA))
return {};
return EIO;
}
ErrorOr<void> VirtIOGraphicsAdapter::flush_displayed_image(Graphics::VirtIOGPU::ResourceID resource_id, Graphics::VirtIOGPU::Protocol::Rect const& dirty_rect)
{
VERIFY(m_operation_lock.is_locked());
auto writer = create_scratchspace_writer();
auto& request = writer.append_structure<Graphics::VirtIOGPU::Protocol::ResourceFlush>();
auto& response = writer.append_structure<Graphics::VirtIOGPU::Protocol::ControlHeader>();
populate_virtio_gpu_request_header(request.header, Graphics::VirtIOGPU::Protocol::CommandType::VIRTIO_GPU_CMD_RESOURCE_FLUSH, 0);
request.resource_id = resource_id.value();
request.rect = dirty_rect;
TRY(synchronous_virtio_gpu_command(100, start_of_scratch_space(), sizeof(request), sizeof(response)));
if (response.type == to_underlying(Graphics::VirtIOGPU::Protocol::CommandType::VIRTIO_GPU_RESP_OK_NODATA))
return {};
return EIO;
}
ErrorOr<void> VirtIOGraphicsAdapter::synchronous_virtio_gpu_command(size_t microseconds_timeout, PhysicalAddress buffer_start, size_t request_size, size_t response_size)
{
VERIFY(m_operation_lock.is_locked());
VERIFY(microseconds_timeout > 10);
VERIFY(microseconds_timeout < 100000);
auto& queue = get_queue(CONTROLQ);
queue.disable_interrupts();
SpinlockLocker lock(queue.lock());
VirtIO::QueueChain chain { queue };
chain.add_buffer_to_chain(buffer_start, request_size, VirtIO::BufferType::DeviceReadable);
chain.add_buffer_to_chain(buffer_start.offset(request_size), response_size, VirtIO::BufferType::DeviceWritable);
supply_chain_and_notify(CONTROLQ, chain);
full_memory_barrier();
size_t current_time = 0;
ScopeGuard clear_used_buffers([&] {
queue.discard_used_buffers();
});
while (current_time < microseconds_timeout) {
if (queue.new_data_available())
return {};
microseconds_delay(1);
current_time++;
}
return Error::from_errno(EBUSY);
}
ErrorOr<void> VirtIOGraphicsAdapter::flush_dirty_rectangle(Graphics::VirtIOGPU::ScanoutID scanout_id, Graphics::VirtIOGPU::ResourceID resource_id, Graphics::VirtIOGPU::Protocol::Rect const& dirty_rect)
{
VERIFY(m_operation_lock.is_locked());
TRY(transfer_framebuffer_data_to_host(scanout_id, resource_id, dirty_rect));
TRY(flush_displayed_image(resource_id, dirty_rect));
return {};
}
Graphics::VirtIOGPU::ResourceID VirtIOGraphicsAdapter::allocate_resource_id()
{
return m_resource_id_counter++;
}
ErrorOr<void> VirtIOGraphicsAdapter::delete_resource(Graphics::VirtIOGPU::ResourceID resource_id)
{
VERIFY(m_operation_lock.is_locked());
auto writer = create_scratchspace_writer();
auto& request = writer.append_structure<Graphics::VirtIOGPU::Protocol::ResourceUnref>();
auto& response = writer.append_structure<Graphics::VirtIOGPU::Protocol::ControlHeader>();
populate_virtio_gpu_request_header(request.header, Graphics::VirtIOGPU::Protocol::CommandType::VIRTIO_GPU_CMD_RESOURCE_UNREF, 0);
request.resource_id = resource_id.value();
TRY(synchronous_virtio_gpu_command(100, start_of_scratch_space(), sizeof(request), sizeof(response)));
if (response.type == to_underlying(Graphics::VirtIOGPU::Protocol::CommandType::VIRTIO_GPU_RESP_OK_NODATA))
return {};
return EIO;
}
ErrorOr<void> VirtIOGraphicsAdapter::initialize_3d_device()
{
if (m_has_virgl_support) {
SpinlockLocker locker(m_operation_lock);
m_3d_device = TRY(VirtIOGPU3DDevice::try_create(*this));
}
return {};
}
ErrorOr<Graphics::VirtIOGPU::ContextID> VirtIOGraphicsAdapter::create_context()
{
VERIFY(m_operation_lock.is_locked());
return m_active_context_ids.with([&](Bitmap& active_context_ids) -> ErrorOr<Graphics::VirtIOGPU::ContextID> {
auto maybe_available_id = active_context_ids.find_first_unset();
if (!maybe_available_id.has_value()) {
dmesgln("VirtIO::GraphicsAdapter: No available context IDs.");
return Error::from_errno(ENXIO);
}
auto new_context_id = static_cast<u32>(maybe_available_id.value());
auto writer = create_scratchspace_writer();
auto& request = writer.append_structure<Graphics::VirtIOGPU::Protocol::ContextCreate>();
auto& response = writer.append_structure<Graphics::VirtIOGPU::Protocol::ControlHeader>();
constexpr char const* region_name = "Serenity VirGL3D Context";
populate_virtio_gpu_request_header(request.header, Graphics::VirtIOGPU::Protocol::CommandType::VIRTIO_GPU_CMD_CTX_CREATE, 0);
request.header.context_id = new_context_id;
request.name_length = strlen(region_name);
memset(request.debug_name.data(), 0, 64);
VERIFY(request.name_length <= 64);
memcpy(request.debug_name.data(), region_name, request.name_length);
TRY(synchronous_virtio_gpu_command(100, start_of_scratch_space(), sizeof(request), sizeof(response)));
if (response.type == to_underlying(Graphics::VirtIOGPU::Protocol::CommandType::VIRTIO_GPU_RESP_OK_NODATA)) {
active_context_ids.set(maybe_available_id.value(), true);
return static_cast<Graphics::VirtIOGPU::ContextID>(new_context_id);
}
return Error::from_errno(EIO);
});
}
ErrorOr<void> VirtIOGraphicsAdapter::submit_command_buffer(Graphics::VirtIOGPU::ContextID context_id, Function<size_t(Bytes)> buffer_writer)
{
VERIFY(m_operation_lock.is_locked());
auto writer = create_scratchspace_writer();
auto& request = writer.append_structure<Graphics::VirtIOGPU::Protocol::CommandSubmit>();
populate_virtio_gpu_request_header(request.header, Graphics::VirtIOGPU::Protocol::CommandType::VIRTIO_GPU_CMD_SUBMIT_3D, 0);
request.header.context_id = context_id.value();
auto max_command_buffer_length = m_scratch_space->size() - sizeof(request) - sizeof(Graphics::VirtIOGPU::Protocol::ControlHeader);
// Truncate to nearest multiple of alignment, to ensure padding loop doesn't exhaust allocated space
max_command_buffer_length -= max_command_buffer_length % alignof(Graphics::VirtIOGPU::Protocol::ControlHeader);
Bytes command_buffer_buffer(m_scratch_space->vaddr().offset(sizeof(request)).as_ptr(), max_command_buffer_length);
request.size = buffer_writer(command_buffer_buffer);
writer.skip_bytes(request.size);
// The alignment of a ControlHeader may be a few words larger than the length of a command buffer, so
// we pad with no-ops until we reach the correct alignment
while (writer.current_offset() % alignof(Graphics::VirtIOGPU::Protocol::ControlHeader) != 0) {
VERIFY((writer.current_offset() % alignof(Graphics::VirtIOGPU::Protocol::ControlHeader)) % sizeof(u32) == 0);
writer.append_structure<u32>() = to_underlying(Graphics::VirtIOGPU::VirGLCommand::NOP);
request.size += 4;
}
dbgln_if(VIRTIO_DEBUG, "VirtIO::GraphicsAdapter: Sending command buffer of length {}", request.size);
auto& response = writer.append_structure<Graphics::VirtIOGPU::Protocol::ControlHeader>();
TRY(synchronous_virtio_gpu_command(100, start_of_scratch_space(), sizeof(request) + request.size, sizeof(response)));
if (response.type == to_underlying(Graphics::VirtIOGPU::Protocol::CommandType::VIRTIO_GPU_RESP_OK_NODATA))
return {};
return EIO;
}
ErrorOr<void> VirtIOGraphicsAdapter::attach_resource_to_context(Graphics::VirtIOGPU::ResourceID resource_id, Graphics::VirtIOGPU::ContextID context_id)
{
VERIFY(m_operation_lock.is_locked());
auto writer = create_scratchspace_writer();
auto& request = writer.append_structure<Graphics::VirtIOGPU::Protocol::ContextAttachResource>();
auto& response = writer.append_structure<Graphics::VirtIOGPU::Protocol::ControlHeader>();
populate_virtio_gpu_request_header(request.header, Graphics::VirtIOGPU::Protocol::CommandType::VIRTIO_GPU_CMD_CTX_ATTACH_RESOURCE, 0);
request.header.context_id = context_id.value();
request.resource_id = resource_id.value();
TRY(synchronous_virtio_gpu_command(100, start_of_scratch_space(), sizeof(request), sizeof(response)));
if (response.type == to_underlying(Graphics::VirtIOGPU::Protocol::CommandType::VIRTIO_GPU_RESP_OK_NODATA))
return {};
return EIO;
}
}
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