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https://github.com/RGBCube/serenity
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9ee098b119
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.
85 lines
4 KiB
C++
85 lines
4 KiB
C++
/*
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* Copyright (c) 2021, Liav A. <liavalb@hotmail.co.il>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <AK/Atomic.h>
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#include <AK/Checked.h>
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#include <AK/Try.h>
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#if ARCH(X86_64)
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# include <Kernel/Arch/x86_64/Hypervisor/BochsDisplayConnector.h>
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#endif
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#include <Kernel/Bus/PCI/API.h>
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#include <Kernel/Bus/PCI/IDs.h>
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#include <Kernel/Devices/GPU/Bochs/Definitions.h>
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#include <Kernel/Devices/GPU/Bochs/GraphicsAdapter.h>
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#include <Kernel/Devices/GPU/Bochs/QEMUDisplayConnector.h>
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#include <Kernel/Devices/GPU/Console/ContiguousFramebufferConsole.h>
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#include <Kernel/Devices/GPU/Management.h>
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#include <Kernel/Memory/TypedMapping.h>
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#include <Kernel/Sections.h>
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namespace Kernel {
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UNMAP_AFTER_INIT ErrorOr<bool> BochsGraphicsAdapter::probe(PCI::DeviceIdentifier const& pci_device_identifier)
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{
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PCI::HardwareID id = pci_device_identifier.hardware_id();
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if (id.vendor_id == PCI::VendorID::QEMUOld && id.device_id == 0x1111)
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return true;
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if (id.vendor_id == PCI::VendorID::VirtualBox && id.device_id == 0xbeef)
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return true;
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return false;
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}
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UNMAP_AFTER_INIT ErrorOr<NonnullLockRefPtr<GenericGraphicsAdapter>> BochsGraphicsAdapter::create(PCI::DeviceIdentifier const& pci_device_identifier)
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{
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auto adapter = TRY(adopt_nonnull_lock_ref_or_enomem(new (nothrow) BochsGraphicsAdapter(pci_device_identifier)));
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MUST(adapter->initialize_adapter(pci_device_identifier));
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return adapter;
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}
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UNMAP_AFTER_INIT BochsGraphicsAdapter::BochsGraphicsAdapter(PCI::DeviceIdentifier const& device_identifier)
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: PCI::Device(const_cast<PCI::DeviceIdentifier&>(device_identifier))
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{
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}
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UNMAP_AFTER_INIT ErrorOr<void> BochsGraphicsAdapter::initialize_adapter(PCI::DeviceIdentifier const& pci_device_identifier)
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{
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// Note: If we use VirtualBox graphics adapter (which is based on Bochs one), we need to use IO ports
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// Note: Bochs (the real bochs graphics adapter in the Bochs emulator) uses revision ID of 0x0
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// and doesn't support memory-mapped IO registers.
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// Note: In non x86-builds, we should never encounter VirtualBox hardware nor Pure Bochs VBE graphics,
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// so just assume we can use the QEMU BochsVBE-compatible graphics adapter only.
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auto bar0_space_size = PCI::get_BAR_space_size(pci_device_identifier, PCI::HeaderType0BaseRegister::BAR0);
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#if ARCH(X86_64)
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bool virtual_box_hardware = (pci_device_identifier.hardware_id().vendor_id == 0x80ee && pci_device_identifier.hardware_id().device_id == 0xbeef);
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if (pci_device_identifier.revision_id().value() == 0x0 || virtual_box_hardware) {
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m_display_connector = BochsDisplayConnector::must_create(PhysicalAddress(PCI::get_BAR0(pci_device_identifier) & PCI::bar_address_mask), bar0_space_size, virtual_box_hardware);
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} else {
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auto registers_mapping = TRY(Memory::map_typed_writable<BochsDisplayMMIORegisters volatile>(PhysicalAddress(PCI::get_BAR2(pci_device_identifier) & PCI::bar_address_mask)));
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VERIFY(registers_mapping.region);
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m_display_connector = QEMUDisplayConnector::must_create(PhysicalAddress(PCI::get_BAR0(pci_device_identifier) & PCI::bar_address_mask), bar0_space_size, move(registers_mapping));
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}
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#else
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auto registers_mapping = TRY(Memory::map_typed_writable<BochsDisplayMMIORegisters volatile>(PhysicalAddress(PCI::get_BAR2(pci_device_identifier) & PCI::bar_address_mask)));
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VERIFY(registers_mapping.region);
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m_display_connector = QEMUDisplayConnector::must_create(PhysicalAddress(PCI::get_BAR0(pci_device_identifier) & PCI::bar_address_mask), bar0_space_size, move(registers_mapping));
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#endif
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// Note: According to Gerd Hoffmann - "The linux driver simply does
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// the unblank unconditionally. With bochs-display this is not needed but
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// it also has no bad side effect".
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// FIXME: If the error is ENOTIMPL, ignore it for now until we implement
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// unblank support for VBoxDisplayConnector class too.
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auto result = m_display_connector->unblank();
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if (result.is_error() && result.error().code() != ENOTIMPL)
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return result;
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TRY(m_display_connector->set_safe_mode_setting());
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return {};
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}
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}
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