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#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>
static MBVGADevice* s_the;
MBVGADevice& MBVGADevice::the()
{
return *s_the;
}
MBVGADevice::MBVGADevice(PhysicalAddress addr, int pitch, int width, int height)
: BlockDevice(29, 0)
, m_framebuffer_address(addr)
, m_framebuffer_pitch(pitch)
, m_framebuffer_width(width)
, m_framebuffer_height(height)
{
dbg() << "MBVGADevice address=" << addr << ", pitch=" << pitch << ", width=" << width << ", height=" << height;
s_the = this;
}
KResultOr<Region*> MBVGADevice::mmap(Process& process, FileDescription&, VirtualAddress preferred_vaddr, size_t offset, size_t size, int prot)
{
ASSERT(offset == 0);
ASSERT(size == framebuffer_size_in_bytes());
auto vmobject = AnonymousVMObject::create_for_physical_range(m_framebuffer_address, framebuffer_size_in_bytes());
auto* region = process.allocate_region_with_vmobject(
preferred_vaddr,
framebuffer_size_in_bytes(),
move(vmobject),
0,
"MBVGA Framebuffer",
prot);
kprintf("MBVGA: %s(%u) created Region{%p} with size %u for framebuffer P%x with vaddr V%p\n",
process.name().characters(), process.pid(),
region, region->size(), m_framebuffer_address.as_ptr(), region->vaddr().get());
ASSERT(region);
return region;
}
int MBVGADevice::ioctl(FileDescription&, unsigned request, unsigned arg)
{
switch (request) {
case FB_IOCTL_GET_SIZE_IN_BYTES: {
auto* out = (size_t*)arg;
if (!current->process().validate_write_typed(out))
return -EFAULT;
*out = framebuffer_size_in_bytes();
return 0;
}
case FB_IOCTL_GET_BUFFER: {
auto* index = (int*)arg;
if (!current->process().validate_write_typed(index))
return -EFAULT;
*index = 0;
return 0;
}
case FB_IOCTL_GET_RESOLUTION: {
auto* resolution = (FBResolution*)arg;
if (!current->process().validate_write_typed(resolution))
return -EFAULT;
resolution->pitch = m_framebuffer_pitch;
resolution->width = m_framebuffer_width;
resolution->height = m_framebuffer_height;
return 0;
}
case FB_IOCTL_SET_RESOLUTION: {
auto* resolution = (FBResolution*)arg;
if (!current->process().validate_read_typed(resolution) || !current->process().validate_write_typed(resolution))
return -EFAULT;
resolution->pitch = m_framebuffer_pitch;
resolution->width = m_framebuffer_width;
resolution->height = m_framebuffer_height;
return 0;
}
default:
return -EINVAL;
};
}
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