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https://github.com/LadybirdBrowser/ladybird.git
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48f7c28a5c
Suggested by Sergey. The currently running Thread and Process are now Thread::current and Process::current respectively. :^)
116 lines
4.1 KiB
C++
116 lines
4.1 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <Kernel/Devices/MBVGADevice.h>
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#include <Kernel/Process.h>
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#include <Kernel/VM/AnonymousVMObject.h>
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#include <Kernel/VM/MemoryManager.h>
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#include <LibC/errno_numbers.h>
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#include <LibC/sys/ioctl_numbers.h>
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namespace Kernel {
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static MBVGADevice* s_the;
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MBVGADevice& MBVGADevice::the()
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{
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return *s_the;
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}
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MBVGADevice::MBVGADevice(PhysicalAddress addr, int pitch, int width, int height)
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: BlockDevice(29, 0)
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, m_framebuffer_address(addr)
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, m_framebuffer_pitch(pitch)
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, m_framebuffer_width(width)
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, m_framebuffer_height(height)
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{
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dbg() << "MBVGADevice address=" << addr << ", pitch=" << pitch << ", width=" << width << ", height=" << height;
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s_the = this;
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}
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KResultOr<Region*> MBVGADevice::mmap(Process& process, FileDescription&, VirtualAddress preferred_vaddr, size_t offset, size_t size, int prot)
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{
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REQUIRE_PROMISE(video);
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ASSERT(offset == 0);
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ASSERT(size == framebuffer_size_in_bytes());
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auto vmobject = AnonymousVMObject::create_for_physical_range(m_framebuffer_address, framebuffer_size_in_bytes());
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if (!vmobject)
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return KResult(-ENOMEM);
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auto* region = process.allocate_region_with_vmobject(
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preferred_vaddr,
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framebuffer_size_in_bytes(),
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vmobject.release_nonnull(),
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0,
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"MBVGA Framebuffer",
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prot);
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dbg() << "MBVGADevice: mmap with size " << region->size() << " at " << region->vaddr();
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ASSERT(region);
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return region;
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}
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int MBVGADevice::ioctl(FileDescription&, unsigned request, unsigned arg)
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{
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REQUIRE_PROMISE(video);
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switch (request) {
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case FB_IOCTL_GET_SIZE_IN_BYTES: {
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auto* out = (size_t*)arg;
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if (!Process::current->validate_write_typed(out))
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return -EFAULT;
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*out = framebuffer_size_in_bytes();
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return 0;
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}
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case FB_IOCTL_GET_BUFFER: {
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auto* index = (int*)arg;
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if (!Process::current->validate_write_typed(index))
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return -EFAULT;
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*index = 0;
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return 0;
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}
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case FB_IOCTL_GET_RESOLUTION: {
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auto* resolution = (FBResolution*)arg;
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if (!Process::current->validate_write_typed(resolution))
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return -EFAULT;
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resolution->pitch = m_framebuffer_pitch;
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resolution->width = m_framebuffer_width;
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resolution->height = m_framebuffer_height;
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return 0;
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}
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case FB_IOCTL_SET_RESOLUTION: {
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auto* resolution = (FBResolution*)arg;
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if (!Process::current->validate_read_typed(resolution) || !Process::current->validate_write_typed(resolution))
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return -EFAULT;
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resolution->pitch = m_framebuffer_pitch;
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resolution->width = m_framebuffer_width;
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resolution->height = m_framebuffer_height;
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return 0;
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}
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default:
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return -EINVAL;
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};
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}
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}
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