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/*
* Copyright (c) 2021, Sahan Fernando <sahan.h.fernando@gmail.com>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <Kernel/API/VirGL.h>
#include <Kernel/Devices/DeviceManagement.h>
#include <Kernel/Graphics/GraphicsManagement.h>
#include <Kernel/Graphics/VirtIOGPU/Console.h>
#include <Kernel/Graphics/VirtIOGPU/DisplayConnector.h>
#include <Kernel/Graphics/VirtIOGPU/GraphicsAdapter.h>
#include <Kernel/Graphics/VirtIOGPU/Protocol.h>
#include <Kernel/Security/Random.h>
namespace Kernel {
NonnullLockRefPtr<VirtIODisplayConnector> VirtIODisplayConnector::must_create(VirtIOGraphicsAdapter& graphics_adapter, Graphics::VirtIOGPU::ScanoutID scanout_id)
{
auto device_or_error = DeviceManagement::try_create_device<VirtIODisplayConnector>(graphics_adapter, scanout_id);
VERIFY(!device_or_error.is_error());
auto connector = device_or_error.release_value();
return connector;
}
static_assert((MAX_VIRTIOGPU_RESOLUTION_WIDTH * MAX_VIRTIOGPU_RESOLUTION_HEIGHT * sizeof(u32) * 2) % PAGE_SIZE == 0);
VirtIODisplayConnector::VirtIODisplayConnector(VirtIOGraphicsAdapter& graphics_adapter, Graphics::VirtIOGPU::ScanoutID scanout_id)
: DisplayConnector((MAX_VIRTIOGPU_RESOLUTION_WIDTH * MAX_VIRTIOGPU_RESOLUTION_HEIGHT * sizeof(u32) * 2), false)
, m_graphics_adapter(graphics_adapter)
, m_scanout_id(scanout_id)
{
}
void VirtIODisplayConnector::initialize_console(Badge<VirtIOGraphicsAdapter>)
{
m_console = Kernel::Graphics::VirtIOGPU::Console::initialize(*this);
GraphicsManagement::the().set_console(*m_console);
}
void VirtIODisplayConnector::set_safe_mode_setting_after_initialization(Badge<VirtIOGraphicsAdapter>)
{
MUST(set_safe_mode_setting());
}
ErrorOr<void> VirtIODisplayConnector::set_mode_setting(ModeSetting const& mode_setting)
{
SpinlockLocker locker(m_modeset_lock);
if (mode_setting.horizontal_active > MAX_VIRTIOGPU_RESOLUTION_WIDTH || mode_setting.vertical_active > MAX_VIRTIOGPU_RESOLUTION_HEIGHT)
return Error::from_errno(ENOTSUP);
auto& info = m_display_info;
info.rect = {
.x = 0,
.y = 0,
.width = (u32)mode_setting.horizontal_active,
.height = (u32)mode_setting.vertical_active,
};
TRY(m_graphics_adapter->mode_set_resolution({}, *this, mode_setting.horizontal_active, mode_setting.vertical_active));
if (m_console)
m_console->set_resolution(info.rect.width, info.rect.height, info.rect.width * sizeof(u32));
DisplayConnector::ModeSetting mode_set {
.horizontal_stride = info.rect.width * sizeof(u32),
.pixel_clock_in_khz = 0, // Note: There's no pixel clock in paravirtualized hardware
.horizontal_active = info.rect.width,
.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 = info.rect.height,
.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;
m_display_info.enabled = 1;
return {};
}
ErrorOr<void> VirtIODisplayConnector::set_safe_mode_setting()
{
DisplayConnector::ModeSetting safe_mode_setting {
.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_setting);
}
ErrorOr<void> VirtIODisplayConnector::set_y_offset(size_t)
{
// NOTE (FIXME?): We don't do double buffering because when using double buffering,
// perfomance visually looks terrible (everything look sluggish) compared to not using it,
// so until we figure out why (and we might not figure this and double buffering is simply not needed)
// this happens, we simply don't support it.
return Error::from_errno(ENOTSUP);
}
ErrorOr<void> VirtIODisplayConnector::unblank()
{
return Error::from_errno(ENOTIMPL);
}
ErrorOr<void> VirtIODisplayConnector::flush_rectangle(size_t buffer_index, FBRect const& rect)
{
VERIFY(m_flushing_lock.is_locked());
if (!is_valid_buffer_index(buffer_index))
return Error::from_errno(EINVAL);
SpinlockLocker locker(m_graphics_adapter->operation_lock());
Graphics::VirtIOGPU::Protocol::Rect dirty_rect {
.x = rect.x,
.y = rect.y,
.width = rect.width,
.height = rect.height
};
TRY(m_graphics_adapter->transfer_framebuffer_data_to_host({}, *this, dirty_rect, true));
// Flushing directly to screen
TRY(flush_displayed_image(dirty_rect, true));
return {};
}
ErrorOr<void> VirtIODisplayConnector::flush_first_surface()
{
VERIFY(m_flushing_lock.is_locked());
SpinlockLocker locker(m_graphics_adapter->operation_lock());
Graphics::VirtIOGPU::Protocol::Rect dirty_rect {
.x = 0,
.y = 0,
.width = m_display_info.rect.width,
.height = m_display_info.rect.height
};
TRY(m_graphics_adapter->transfer_framebuffer_data_to_host({}, *this, dirty_rect, true));
// Flushing directly to screen
TRY(flush_displayed_image(dirty_rect, true));
return {};
}
void VirtIODisplayConnector::enable_console()
{
VERIFY(m_control_lock.is_locked());
VERIFY(m_console);
m_console->enable();
}
void VirtIODisplayConnector::disable_console()
{
VERIFY(m_control_lock.is_locked());
VERIFY(m_console);
m_console->disable();
}
void VirtIODisplayConnector::set_edid_bytes(Badge<VirtIOGraphicsAdapter>, Array<u8, 128> const& edid_bytes)
{
DisplayConnector::set_edid_bytes(edid_bytes);
}
Graphics::VirtIOGPU::Protocol::DisplayInfoResponse::Display VirtIODisplayConnector::display_information(Badge<VirtIOGraphicsAdapter>) const
{
return m_display_info;
}
void VirtIODisplayConnector::clear_to_black()
{
size_t width = m_display_info.rect.width;
size_t height = m_display_info.rect.height;
u8* data = framebuffer_data();
for (size_t i = 0; i < width * height; ++i) {
data[4 * i + 0] = 0x00;
data[4 * i + 1] = 0x00;
data[4 * i + 2] = 0x00;
data[4 * i + 3] = 0xff;
}
}
ErrorOr<void> VirtIODisplayConnector::flush_displayed_image(Graphics::VirtIOGPU::Protocol::Rect const& dirty_rect, bool main_buffer)
{
VERIFY(m_graphics_adapter->operation_lock().is_locked());
TRY(m_graphics_adapter->flush_displayed_image({}, *this, dirty_rect, main_buffer));
return {};
}
void VirtIODisplayConnector::set_dirty_displayed_rect(Graphics::VirtIOGPU::Protocol::Rect const& dirty_rect, bool main_buffer)
{
VERIFY(m_graphics_adapter->operation_lock().is_locked());
m_graphics_adapter->set_dirty_displayed_rect({}, *this, dirty_rect, main_buffer);
}
}
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