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SPDX License Identifiers are a more compact / standardized way of representing file license information. See: https://spdx.dev/resources/use/#identifiers This was done with the `ambr` search and replace tool. ambr --no-parent-ignore --key-from-file --rep-from-file key.txt rep.txt *
104 lines
2.8 KiB
C++
104 lines
2.8 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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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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UNMAP_AFTER_INIT MBVGADevice::MBVGADevice(PhysicalAddress addr, size_t pitch, size_t width, size_t 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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dbgln("MBVGADevice address={}, pitch={}, width={}, height={}", addr, pitch, width, height);
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s_the = this;
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}
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KResultOr<Region*> MBVGADevice::mmap(Process& process, FileDescription&, const Range& range, u64 offset, int prot, bool shared)
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{
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REQUIRE_PROMISE(video);
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if (!shared)
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return ENODEV;
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if (offset != 0)
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return ENXIO;
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if (range.size() != page_round_up(framebuffer_size_in_bytes()))
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return EOVERFLOW;
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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 ENOMEM;
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return process.space().allocate_region_with_vmobject(
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range,
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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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shared);
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}
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int MBVGADevice::ioctl(FileDescription&, unsigned request, FlatPtr 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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size_t value = framebuffer_size_in_bytes();
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if (!copy_to_user(out, &value))
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return -EFAULT;
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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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int value = 0;
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if (!copy_to_user(index, &value))
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return -EFAULT;
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return 0;
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}
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case FB_IOCTL_GET_RESOLUTION: {
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auto* user_resolution = (FBResolution*)arg;
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FBResolution resolution;
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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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if (!copy_to_user(user_resolution, &resolution))
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return -EFAULT;
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return 0;
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}
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case FB_IOCTL_SET_RESOLUTION: {
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auto* user_resolution = (FBResolution*)arg;
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FBResolution resolution;
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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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if (!copy_to_user(user_resolution, &resolution))
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return -EFAULT;
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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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String MBVGADevice::device_name() const
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{
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return String::formatted("fb{}", minor());
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}
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}
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