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https://github.com/RGBCube/serenity
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This ensures we safely handle interrupts (which can call virtual functions), so they don't happen in the constructor - this pattern can lead to a crash, if we are still in the constructor context because not all methods are available for usage (some are pure virtual, so it's possible to call __cxa_pure_virtual). Also, under some conditions like adding a PCI device via PCI-passthrough mechanism in QEMU, it became exposed to the eye that the code asserts on RNG::handle_device_config_change(). That device has no configuration but if the hypervisor still misbehaves and tries to configure it, we should simply return false to indicate nothing happened.
59 lines
1.8 KiB
C++
59 lines
1.8 KiB
C++
/*
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* Copyright (c) 2021, Sahan Fernando <sahan.h.fernando@gmail.com>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <Kernel/Bus/PCI/IDs.h>
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#include <Kernel/Graphics/Console/GenericFramebufferConsole.h>
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#include <Kernel/Graphics/GraphicsManagement.h>
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#include <Kernel/Graphics/VirtIOGPU/GPU.h>
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#include <Kernel/Graphics/VirtIOGPU/GraphicsAdapter.h>
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namespace Kernel::Graphics::VirtIOGPU {
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NonnullRefPtr<GraphicsAdapter> GraphicsAdapter::initialize(PCI::Address base_address)
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{
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VERIFY(PCI::get_id(base_address).vendor_id == PCI::VendorID::VirtIO);
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return adopt_ref(*new GraphicsAdapter(base_address));
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}
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GraphicsAdapter::GraphicsAdapter(PCI::Address base_address)
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: PCI::Device(base_address)
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{
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m_gpu_device = adopt_ref(*new GPU(base_address)).leak_ref();
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m_gpu_device->initialize();
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}
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void GraphicsAdapter::initialize_framebuffer_devices()
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{
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dbgln_if(VIRTIO_DEBUG, "GPU: Initializing framebuffer devices");
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VERIFY(!m_created_framebuffer_devices);
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m_gpu_device->create_framebuffer_devices();
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m_created_framebuffer_devices = true;
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// FIXME: This is a very wrong way to do this...
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GraphicsManagement::the().m_console = m_gpu_device->default_console();
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}
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void GraphicsAdapter::enable_consoles()
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{
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dbgln_if(VIRTIO_DEBUG, "GPU: Enabling consoles");
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m_gpu_device->for_each_framebuffer([&](auto& framebuffer, auto& console) {
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framebuffer.deactivate_writes();
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console.enable();
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return IterationDecision::Continue;
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});
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}
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void GraphicsAdapter::disable_consoles()
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{
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dbgln_if(VIRTIO_DEBUG, "GPU: Disabling consoles");
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m_gpu_device->for_each_framebuffer([&](auto& framebuffer, auto& console) {
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console.disable();
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framebuffer.activate_writes();
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return IterationDecision::Continue;
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});
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}
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}
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