PS3 GPU Driver

Introduction

• FreeBSD character device which gives you direct access to PS3 GPU from user-space.

Features

• Upto 3 GPU contexts simultaneously (LV1 limit is 3 contexts per LPAR).
• Direct control of GPU FIFO from user-space.
• Support of hardware cursors.
• Dynamic allocation of GART memory.
• Mapping of GART memory into GPU address space is done by the driver. That means user-space applications do not have to worry about it.
• Access to GART and VRAM memory through mmap syscall.
• Heap management for GART and VRAM memory.
• Support of display buffers.

Kernel Driver

• http://gitorious.ps3dev.net/ps3freebsd/ps3gpu

Building

• You can cross-compile the kernel module or build it natively on PS3 FreeBSD.
• The kernel module and the kernel should match. That means the kernel module should be build against the same kernel source else the kernel module cannot be loaded (The same applies on Linux).

cd /usr/devel
env MAKEOBJDIRPREFIX=/usr/obj/PS3 SYSDIR=/usr/devel/sys make TARGET=powerpc TARGET_ARCH=powerpc64 buildenv
cd /home/glevand/ps3gpu
make
ls -l ps3gpu.ko

Test

• ps3gpu_test is a user-space application for testing ps3gpu kernel driver.
• The application demonstrates how to allocate GART and VRAM memory, how to load, set and move cursor and how to flip.
• http://gitorious.ps3dev.net/ps3freebsd/ps3gpu_test

kldload ./ps3gpu.ko

cd ps3gpu_test
make

sudo ./ps3gpu_test
context id 0
control handle 0x10000000000 size 4096
fifo handle 0x40000000000 gpu addr 0x08d000000
FIFO put 0x0d000000 get 0x0d000000 ref 0xdeadbabe
reset GPU state handle 0x50000000000 gpu addr 0x0d010000
FIFO put 0x0d00000c get 0x0d00000c ref 0xcafef00d
VRAM handle 0x60000000000 gpu addr 0x00000000
cursor handle 0x70000000000 gpu addr 0x00900000

To restore your console:

vidcontrol < /dev/ttyv0 80x25

X11 Driver

• You need this driver to run X11 server on PS3.
• http://gitorious.ps3dev.net/ps3freebsd/xf86-video-ps3gpu

Future Work

• Use ps3gpu driver for syscons.