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/*
* Copyright (c) 2021, Liav A. <liavalb@hotmail.co.il>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <AK/Checked.h>
#include <AK/Singleton.h>
#include <Kernel/CommandLine.h>
#include <Kernel/Debug.h>
#include <Kernel/Graphics/BochsGraphicsAdapter.h>
#include <Kernel/Graphics/Console/FramebufferConsole.h>
#include <Kernel/Graphics/Console/TextModeConsole.h>
#include <Kernel/Graphics/GraphicsManagement.h>
#include <Kernel/Graphics/IntelNativeGraphicsAdapter.h>
#include <Kernel/Graphics/VGACompatibleAdapter.h>
#include <Kernel/IO.h>
#include <Kernel/Multiboot.h>
#include <Kernel/VM/AnonymousVMObject.h>
namespace Kernel {
static AK::Singleton<GraphicsManagement> s_the;
GraphicsManagement& GraphicsManagement::the()
{
return *s_the;
}
bool GraphicsManagement::is_initialized()
{
return s_the.is_initialized();
}
UNMAP_AFTER_INIT GraphicsManagement::GraphicsManagement()
: m_vga_font_region(MM.allocate_kernel_region(PAGE_SIZE, "VGA font", Region::Access::Read | Region::Access::Write, AllocationStrategy::AllocateNow).release_nonnull())
, m_framebuffer_devices_allowed(!kernel_command_line().is_no_framebuffer_devices_mode())
{
}
void GraphicsManagement::deactivate_graphical_mode()
{
for (auto& graphics_device : m_graphics_devices) {
graphics_device.enable_consoles();
}
}
void GraphicsManagement::activate_graphical_mode()
{
for (auto& graphics_device : m_graphics_devices) {
graphics_device.disable_consoles();
}
}
UNMAP_AFTER_INIT RefPtr<GraphicsDevice> GraphicsManagement::determine_graphics_device(PCI::Address address, PCI::ID id) const
{
if ((id.vendor_id == 0x1234 && id.device_id == 0x1111) || (id.vendor_id == 0x80ee && id.device_id == 0xbeef)) {
return BochsGraphicsAdapter::initialize(address);
}
if (PCI::get_class(address) == 0x3 && PCI::get_subclass(address) == 0x0) {
if (id.vendor_id == 0x8086) {
auto adapter = IntelNativeGraphicsAdapter::initialize(address);
if (!adapter.is_null())
return adapter;
}
if (multiboot_info_ptr->framebuffer_type == MULTIBOOT_FRAMEBUFFER_TYPE_RGB) {
dmesgln("Graphics: Using a preset resolution from the bootloader");
return VGACompatibleAdapter::initialize_with_preset_resolution(address,
PhysicalAddress((u32)(multiboot_info_ptr->framebuffer_addr)),
multiboot_info_ptr->framebuffer_width,
multiboot_info_ptr->framebuffer_height,
multiboot_info_ptr->framebuffer_pitch);
}
return VGACompatibleAdapter::initialize(address);
}
return {};
}
UNMAP_AFTER_INIT bool GraphicsManagement::initialize()
{
/* Explanation on the flow when not requesting to force not creating any
* framebuffer devices:
* If the user wants to use a Console instead of the graphical environment,
* they doesn't need to request text mode.
* Graphical mode might not be accessible on bare-metal hardware because
* the bootloader didn't set a framebuffer and we don't have a native driver
* to set a framebuffer for it. We don't have VBE modesetting capabilities
* in the kernel yet, so what will happen is one of the following situations:
* 1. The bootloader didn't specify settings of a pre-set framebuffer. The
* kernel has a native driver for a detected display adapter, therefore
* the kernel can still set a framebuffer.
* 2. The bootloader specified settings of a pre-set framebuffer, and the
* kernel has a native driver for a detected display adapter, therefore
* the kernel can still set a framebuffer and change the settings of it.
* In that situation, the kernel will simply ignore the Multiboot pre-set
* framebuffer.
* 2. The bootloader specified settings of a pre-set framebuffer, and the
* kernel does not have a native driver for a detected display adapter,
* therefore the kernel will use the pre-set framebuffer. Modesetting is not
* availabe in this situation.
* 3. The bootloader didn't specify settings of a pre-set framebuffer, and
* the kernel does not have a native driver for a detected display adapter,
* therefore the kernel will try to initialize a VGA text mode console.
* In that situation, the kernel will assume that VGA text mode was already
* initialized, but will still try to modeset it. No switching to graphical
* enviroment is allowed in this case.
*
* By default, the kernel assumes that no framebuffer was created until it
* was proven that there's an existing framebuffer or we can modeset the
* screen resolution to create a framebuffer.
*
* If the user requests to force no initialization of framebuffer devices
* the same flow above will happen, except that no framebuffer device will
* be created, so SystemServer will not try to initialize WindowServer.
*/
if (kernel_command_line().is_no_framebuffer_devices_mode()) {
dbgln("Forcing no initialization of framebuffer devices");
}
PCI::enumerate([&](const PCI::Address& address, PCI::ID id) {
// Note: Each graphics controller will try to set its native screen resolution
// upon creation. Later on, if we don't want to have framebuffer devices, a
// framebuffer console will take the control instead.
auto adapter = determine_graphics_device(address, id);
if (!adapter)
return;
// If IO space is enabled, this VGA adapter is operating in VGA mode.
if (adapter->type() == GraphicsDevice::Type::VGACompatible && PCI::is_io_space_enabled(address)) {
VERIFY(m_vga_adapter.is_null());
dbgln("Graphics adapter @ {} is operating in VGA mode", address);
m_vga_adapter = adapter;
}
auto display_adapter = adapter.release_nonnull();
m_graphics_devices.append(display_adapter);
if (!m_framebuffer_devices_allowed) {
display_adapter->enable_consoles();
return;
}
display_adapter->initialize_framebuffer_devices();
});
return true;
}
bool GraphicsManagement::framebuffer_devices_exist() const
{
for (auto& graphics_device : m_graphics_devices) {
if (graphics_device.framebuffer_devices_initialized())
return true;
}
return false;
}
}
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