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Kernel: Implement generic framebuffer ioctls in BXVGA

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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
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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: