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Kernel/Graphics: Move Bochs graphics related code into a separate folder
This commit is contained in:
Liav A
Andreas Kling
parent
3fee1cbe66
commit
2a1bf53435
4 changed files with 3 additions and 3 deletions
230
Kernel/Graphics/Bochs/GraphicsAdapter.cpp
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230
Kernel/Graphics/Bochs/GraphicsAdapter.cpp
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/*
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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/Singleton.h>
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#include <Kernel/Bus/PCI/Access.h>
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#include <Kernel/Bus/PCI/IDs.h>
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#include <Kernel/Debug.h>
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#include <Kernel/Graphics/Bochs/GraphicsAdapter.h>
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#include <Kernel/Graphics/Console/ContiguousFramebufferConsole.h>
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#include <Kernel/Graphics/GraphicsManagement.h>
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#include <Kernel/IO.h>
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#include <Kernel/Sections.h>
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#include <Kernel/VM/TypedMapping.h>
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#define VBE_DISPI_IOPORT_INDEX 0x01CE
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#define VBE_DISPI_IOPORT_DATA 0x01CF
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#define VBE_DISPI_INDEX_ID 0x0
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#define VBE_DISPI_INDEX_XRES 0x1
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#define VBE_DISPI_INDEX_YRES 0x2
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#define VBE_DISPI_INDEX_BPP 0x3
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#define VBE_DISPI_INDEX_ENABLE 0x4
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#define VBE_DISPI_INDEX_BANK 0x5
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#define VBE_DISPI_INDEX_VIRT_WIDTH 0x6
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#define VBE_DISPI_INDEX_VIRT_HEIGHT 0x7
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#define VBE_DISPI_INDEX_X_OFFSET 0x8
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#define VBE_DISPI_INDEX_Y_OFFSET 0x9
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#define VBE_DISPI_DISABLED 0x00
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#define VBE_DISPI_ENABLED 0x01
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#define VBE_DISPI_LFB_ENABLED 0x40
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namespace Kernel {
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struct [[gnu::packed]] DISPIInterface {
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u16 index_id;
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u16 xres;
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u16 yres;
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u16 bpp;
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u16 enable;
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u16 bank;
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u16 virt_width;
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u16 virt_height;
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u16 x_offset;
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u16 y_offset;
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};
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struct [[gnu::packed]] BochsDisplayMMIORegisters {
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u8 edid_data[0x400];
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u16 vga_ioports[0x10];
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u8 reserved[0xE0];
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DISPIInterface bochs_regs;
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};
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UNMAP_AFTER_INIT NonnullRefPtr<BochsGraphicsAdapter> BochsGraphicsAdapter::initialize(PCI::Address address)
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{
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PCI::ID id = PCI::get_id(address);
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VERIFY((id.vendor_id == PCI::VendorID::QEMUOld && id.device_id == 0x1111) || (id.vendor_id == PCI::VendorID::VirtualBox && id.device_id == 0xbeef));
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return adopt_ref(*new BochsGraphicsAdapter(address));
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}
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UNMAP_AFTER_INIT BochsGraphicsAdapter::BochsGraphicsAdapter(PCI::Address pci_address)
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: PCI::DeviceController(pci_address)
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, m_mmio_registers(PCI::get_BAR2(pci_address) & 0xfffffff0)
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, m_registers(map_typed_writable<BochsDisplayMMIORegisters volatile>(m_mmio_registers))
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{
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// We assume safe resolutio is 1024x768x32
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m_framebuffer_console = Graphics::ContiguousFramebufferConsole::initialize(PhysicalAddress(PCI::get_BAR0(pci_address) & 0xfffffff0), 1024, 768, 1024 * sizeof(u32));
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// FIXME: This is a very wrong way to do this...
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GraphicsManagement::the().m_console = m_framebuffer_console;
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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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auto id = PCI::get_id(pci_address);
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if (id.vendor_id == 0x80ee && id.device_id == 0xbeef)
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m_io_required = true;
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// FIXME: Although this helps with setting the screen to work on some cases,
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// we need to check we actually can access the VGA MMIO remapped ioports before
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// doing the unblanking.
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unblank();
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set_safe_resolution();
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}
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UNMAP_AFTER_INIT void BochsGraphicsAdapter::initialize_framebuffer_devices()
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{
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// FIXME: Find a better way to determine default resolution...
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m_framebuffer_device = FramebufferDevice::create(*this, 0, PhysicalAddress(PCI::get_BAR0(pci_address()) & 0xfffffff0), 1024, 768, 1024 * sizeof(u32));
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m_framebuffer_device->initialize();
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}
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GraphicsDevice::Type BochsGraphicsAdapter::type() const
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{
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if (PCI::get_class(pci_address()) == 0x3 && PCI::get_subclass(pci_address()) == 0x0)
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return Type::VGACompatible;
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return Type::Bochs;
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}
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void BochsGraphicsAdapter::unblank()
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{
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full_memory_barrier();
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m_registers->vga_ioports[0] = 0x20;
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full_memory_barrier();
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}
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void BochsGraphicsAdapter::set_safe_resolution()
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{
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VERIFY(m_framebuffer_console);
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auto result = try_to_set_resolution(0, 1024, 768);
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VERIFY(result);
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}
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static void set_register_with_io(u16 index, u16 data)
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{
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IO::out16(VBE_DISPI_IOPORT_INDEX, index);
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IO::out16(VBE_DISPI_IOPORT_DATA, data);
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}
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static u16 get_register_with_io(u16 index)
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{
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IO::out16(VBE_DISPI_IOPORT_INDEX, index);
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return IO::in16(VBE_DISPI_IOPORT_DATA);
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}
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void BochsGraphicsAdapter::set_resolution_registers_via_io(size_t width, size_t height)
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{
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dbgln_if(BXVGA_DEBUG, "BochsGraphicsAdapter resolution registers set to - {}x{}", width, height);
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set_register_with_io(VBE_DISPI_INDEX_ENABLE, VBE_DISPI_DISABLED);
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set_register_with_io(VBE_DISPI_INDEX_XRES, (u16)width);
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set_register_with_io(VBE_DISPI_INDEX_YRES, (u16)height);
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set_register_with_io(VBE_DISPI_INDEX_VIRT_WIDTH, (u16)width);
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set_register_with_io(VBE_DISPI_INDEX_VIRT_HEIGHT, (u16)height * 2);
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set_register_with_io(VBE_DISPI_INDEX_BPP, 32);
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set_register_with_io(VBE_DISPI_INDEX_ENABLE, VBE_DISPI_ENABLED | VBE_DISPI_LFB_ENABLED);
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set_register_with_io(VBE_DISPI_INDEX_BANK, 0);
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}
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void BochsGraphicsAdapter::set_resolution_registers(size_t width, size_t height)
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{
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dbgln_if(BXVGA_DEBUG, "BochsGraphicsAdapter resolution registers set to - {}x{}", width, height);
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m_registers->bochs_regs.enable = VBE_DISPI_DISABLED;
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full_memory_barrier();
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m_registers->bochs_regs.xres = width;
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m_registers->bochs_regs.yres = height;
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m_registers->bochs_regs.virt_width = width;
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m_registers->bochs_regs.virt_height = height * 2;
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m_registers->bochs_regs.bpp = 32;
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full_memory_barrier();
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m_registers->bochs_regs.enable = VBE_DISPI_ENABLED | VBE_DISPI_LFB_ENABLED;
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full_memory_barrier();
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m_registers->bochs_regs.bank = 0;
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}
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bool BochsGraphicsAdapter::try_to_set_resolution(size_t output_port_index, size_t width, size_t height)
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{
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// Note: There's only one output port for this adapter
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VERIFY(output_port_index == 0);
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VERIFY(m_framebuffer_console);
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if (Checked<size_t>::multiplication_would_overflow(width, height, sizeof(u32)))
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return false;
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if (m_io_required)
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set_resolution_registers_via_io(width, height);
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else
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set_resolution_registers(width, height);
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dbgln_if(BXVGA_DEBUG, "BochsGraphicsAdapter resolution test - {}x{}", width, height);
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if (m_io_required) {
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if (!validate_setup_resolution_with_io(width, height))
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return false;
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} else {
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if (!validate_setup_resolution(width, height))
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return false;
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}
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dbgln("BochsGraphicsAdapter: resolution set to {}x{}", width, height);
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m_framebuffer_console->set_resolution(width, height, width * sizeof(u32));
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return true;
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}
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bool BochsGraphicsAdapter::validate_setup_resolution_with_io(size_t width, size_t height)
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{
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if ((u16)width != get_register_with_io(VBE_DISPI_INDEX_XRES) || (u16)height != get_register_with_io(VBE_DISPI_INDEX_YRES)) {
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return false;
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}
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return true;
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}
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bool BochsGraphicsAdapter::validate_setup_resolution(size_t width, size_t height)
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{
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if ((u16)width != m_registers->bochs_regs.xres || (u16)height != m_registers->bochs_regs.yres) {
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return false;
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}
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return true;
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}
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bool BochsGraphicsAdapter::set_y_offset(size_t output_port_index, size_t y_offset)
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{
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VERIFY(output_port_index == 0);
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if (m_console_enabled)
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return false;
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m_registers->bochs_regs.y_offset = y_offset;
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return true;
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}
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void BochsGraphicsAdapter::enable_consoles()
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{
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ScopedSpinLock lock(m_console_mode_switch_lock);
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VERIFY(m_framebuffer_console);
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m_console_enabled = true;
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m_registers->bochs_regs.y_offset = 0;
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if (m_framebuffer_device)
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m_framebuffer_device->deactivate_writes();
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m_framebuffer_console->enable();
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}
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void BochsGraphicsAdapter::disable_consoles()
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{
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ScopedSpinLock lock(m_console_mode_switch_lock);
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VERIFY(m_framebuffer_console);
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VERIFY(m_framebuffer_device);
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m_console_enabled = false;
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m_registers->bochs_regs.y_offset = 0;
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m_framebuffer_console->disable();
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m_framebuffer_device->activate_writes();
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}
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}
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