RGBCube/serenity
1
Fork 0
mirror of https://github.com/RGBCube/serenity synced 2025-07-25 17:27:35 +00:00
Code Issues Activity Actions

Kernel: Implement generic framebuffer ioctls in BXVGA

Browse source 
This also hides some functions that were previously public, since that
same functionality is now exposed via ioctl functions.
This commit is contained in:
Conrad Pankoff 2019-08-18 12:29:58 +10:00 • committed by Andreas Kling
parent 5e46122a82
commit 3932dfbb04
2 changed files with 47 additions and 27 deletions
Download patch file Download diff file Expand all files Collapse all files

61
Kernel/Devices/BXVGADevice.cpp
View file

@ -5,6 +5,7 @@
#include <Kernel/VM/AnonymousVMObject.h>
#include <Kernel/VM/MemoryManager.h>
#include <LibC/errno_numbers.h>
#include <LibC/sys/ioctl_numbers.h>
#define VBE_DISPI_IOPORT_INDEX 0x01CE
#define VBE_DISPI_IOPORT_DATA 0x01CF
@ -23,13 +24,6 @@
#define VBE_DISPI_ENABLED 0x01
#define VBE_DISPI_LFB_ENABLED 0x40
#define BXVGA_DEV_IOCTL_SET_Y_OFFSET 1982
#define BXVGA_DEV_IOCTL_SET_RESOLUTION 1985
struct BXVGAResolution {
int width;
int height;
};
static BXVGADevice* s_the;
BXVGADevice& BXVGADevice::the()
@ -52,6 +46,7 @@ void BXVGADevice::set_register(u16 index, u16 data)
void BXVGADevice::set_resolution(int width, int height)
{
m_framebuffer_pitch = width * sizeof(u32);
m_framebuffer_width = width;
m_framebuffer_height = height;
@ -65,10 +60,11 @@ void BXVGADevice::set_resolution(int width, int height)
set_register(VBE_DISPI_INDEX_BANK, 0);
}
void BXVGADevice::set_y_offset(int offset)
void BXVGADevice::set_y_offset(int y_offset)
{
ASSERT(offset <= m_framebuffer_height);
set_register(VBE_DISPI_INDEX_Y_OFFSET, (u16)offset);
ASSERT(y_offset == 0 || y_offset == m_framebuffer_height);
m_y_offset = y_offset;
set_register(VBE_DISPI_INDEX_Y_OFFSET, (u16)y_offset);
}
u32 BXVGADevice::find_framebuffer_address()
@ -90,7 +86,7 @@ KResultOr<Region*> BXVGADevice::mmap(Process& process, FileDescription&, Virtual
{
ASSERT(offset == 0);
ASSERT(size == framebuffer_size_in_bytes());
auto vmo = AnonymousVMObject::create_for_physical_range(framebuffer_address(), framebuffer_size_in_bytes());
auto vmo = AnonymousVMObject::create_for_physical_range(m_framebuffer_address, framebuffer_size_in_bytes());
auto* region = process.allocate_region_with_vmo(
preferred_vaddr,
framebuffer_size_in_bytes(),
@ -100,7 +96,7 @@ KResultOr<Region*> BXVGADevice::mmap(Process& process, FileDescription&, Virtual
prot);
kprintf("BXVGA: %s(%u) created Region{%p} with size %u for framebuffer P%x with vaddr L%x\n",
process.name().characters(), process.pid(),
region, region->size(), framebuffer_address().as_ptr(), region->vaddr().get());
region, region->size(), m_framebuffer_address.as_ptr(), region->vaddr().get());
ASSERT(region);
return region;
}
@ -108,16 +104,43 @@ KResultOr<Region*> BXVGADevice::mmap(Process& process, FileDescription&, Virtual
int BXVGADevice::ioctl(FileDescription&, unsigned request, unsigned arg)
{
switch (request) {
case BXVGA_DEV_IOCTL_SET_Y_OFFSET:
if (arg > (unsigned)m_framebuffer_height * 2)
return -EINVAL;
set_y_offset((int)arg);
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 BXVGA_DEV_IOCTL_SET_RESOLUTION: {
auto* resolution = (const BXVGAResolution*)arg;
if (!current->process().validate_read_typed(resolution))
}
case FB_IOCTL_GET_BUFFER: {
auto* index = (int*)arg;
if (!current->process().validate_write_typed(index))
return -EFAULT;
*index = m_y_offset == 0 ? 0 : 1;
return 0;
}
case FB_IOCTL_SET_BUFFER: {
if (arg != 0 && arg != 1)
return -EINVAL;
set_y_offset(arg == 0 ? 0 : m_framebuffer_height);
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;
set_resolution(resolution->width, resolution->height);
resolution->pitch = m_framebuffer_pitch;
resolution->width = m_framebuffer_width;
resolution->height = m_framebuffer_height;
return 0;
}
default: