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/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <Kernel/Devices/MBVGADevice.h>
#include <Kernel/Process.h>
#include <Kernel/VM/AnonymousVMObject.h>
#include <Kernel/VM/MemoryManager.h>
#include <LibC/errno_numbers.h>
#include <LibC/sys/ioctl_numbers.h>
namespace Kernel {
static MBVGADevice* s_the;
MBVGADevice& MBVGADevice::the()
{
return *s_the;
}
UNMAP_AFTER_INIT MBVGADevice::MBVGADevice(PhysicalAddress addr, size_t pitch, size_t width, size_t height)
: BlockDevice(29, 0)
, m_framebuffer_address(addr)
, m_framebuffer_pitch(pitch)
, m_framebuffer_width(width)
, m_framebuffer_height(height)
{
dbgln("MBVGADevice address={}, pitch={}, width={}, height={}", addr, pitch, width, height);
s_the = this;
}
KResultOr<Region*> MBVGADevice::mmap(Process& process, FileDescription&, const Range& range, u64 offset, int prot, bool shared)
{
REQUIRE_PROMISE(video);
if (!shared)
return ENODEV;
if (offset != 0)
return ENXIO;
if (range.size() != page_round_up(framebuffer_size_in_bytes()))
return EOVERFLOW;
auto vmobject = AnonymousVMObject::create_for_physical_range(m_framebuffer_address, framebuffer_size_in_bytes());
if (!vmobject)
return ENOMEM;
return process.space().allocate_region_with_vmobject(
range,
vmobject.release_nonnull(),
0,
"MBVGA Framebuffer",
prot,
shared);
}
int MBVGADevice::ioctl(FileDescription&, unsigned request, FlatPtr arg)
{
REQUIRE_PROMISE(video);
switch (request) {
case FB_IOCTL_GET_SIZE_IN_BYTES: {
auto* out = (size_t*)arg;
size_t value = framebuffer_size_in_bytes();
if (!copy_to_user(out, &value))
return -EFAULT;
return 0;
}
case FB_IOCTL_GET_BUFFER: {
auto* index = (int*)arg;
int value = 0;
if (!copy_to_user(index, &value))
return -EFAULT;
return 0;
}
case FB_IOCTL_GET_RESOLUTION: {
auto* user_resolution = (FBResolution*)arg;
FBResolution resolution;
resolution.pitch = m_framebuffer_pitch;
resolution.width = m_framebuffer_width;
resolution.height = m_framebuffer_height;
if (!copy_to_user(user_resolution, &resolution))
return -EFAULT;
return 0;
}
case FB_IOCTL_SET_RESOLUTION: {
auto* user_resolution = (FBResolution*)arg;
FBResolution resolution;
resolution.pitch = m_framebuffer_pitch;
resolution.width = m_framebuffer_width;
resolution.height = m_framebuffer_height;
if (!copy_to_user(user_resolution, &resolution))
return -EFAULT;
return 0;
}
default:
return -EINVAL;
};
}
String MBVGADevice::device_name() const
{
return String::formatted("fb{}", minor());
}
}
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