[PATCH] ps3: Virtual Frame Buffer Driver

Add the PS3 Virtual Frame Buffer Driver.

As the actual graphics hardware cannot be accessed directly by Linux, ps3fb
uses a virtual frame buffer in main memory.  The actual screen image is copied
to graphics memory by the GPU on every vertical blank, by making a hypervisor
call.

Signed-off-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com>
Cc: James Simmons <jsimmons@infradead.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

drivers/video/Kconfig

@@ -1598,6 +1598,26 @@ config FB_IBM_GXT4500
 	  Say Y here to enable support for the IBM GXT4500P display
 	  adaptor, found on some IBM System P (pSeries) machines.
 
+config FB_PS3
+	bool "PS3 GPU framebuffer driver"
+	depends on FB && PPC_PS3
+	select PS3_PS3AV
+	select FB_CFB_FILLRECT
+	select FB_CFB_COPYAREA
+	select FB_CFB_IMAGEBLIT
+	---help---
+	  Include support for the virtual frame buffer in the PS3 platform.
+
+config FB_PS3_DEFAULT_SIZE_M
+	int "PS3 default frame buffer size (in MiB)"
+	depends on FB_PS3
+	default 18
+	---help---
+	  This is the default size (in MiB) of the virtual frame buffer in
+	  the PS3.
+	  The default value can be overridden on the kernel command line
+	  using the "ps3fb" option (e.g. "ps3fb=9M");
+
 config FB_VIRTUAL
 	tristate "Virtual Frame Buffer support (ONLY FOR TESTING!)"
 	depends on FB

drivers/video/Makefile

@@ -97,6 +97,7 @@ obj-$(CONFIG_FB_S3C2410)	  += s3c2410fb.o
 obj-$(CONFIG_FB_PNX4008_DUM)	  += pnx4008/
 obj-$(CONFIG_FB_PNX4008_DUM_RGB)  += pnx4008/
 obj-$(CONFIG_FB_IBM_GXT4500)	  += gxt4500.o
+obj-$(CONFIG_FB_PS3)		  += ps3fb.o
 
 # Platform or fallback drivers go here
 obj-$(CONFIG_FB_VESA)             += vesafb.o

include/asm-powerpc/Kbuild

@@ -23,6 +23,7 @@ header-y += linkage.h
 header-y += resource.h
 header-y += sigcontext.h
 header-y += statfs.h
+header-y += ps3fb.h
 
 unifdef-y += a.out.h
 unifdef-y += asm-compat.h

include/asm-powerpc/ps3fb.h

@@ -0,0 +1,44 @@
+/*
+ * Copyright (C) 2006 Sony Computer Entertainment Inc.
+ * Copyright 2006, 2007 Sony Corporation
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published
+ * by the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifndef _ASM_POWERPC_PS3FB_H_
+#define _ASM_POWERPC_PS3FB_H_
+
+#include <linux/ioctl.h>
+
+/* ioctl */
+#define PS3FB_IOCTL_SETMODE       _IOW('r',  1, int) /* set video mode */
+#define PS3FB_IOCTL_GETMODE       _IOR('r',  2, int) /* get video mode */
+#define PS3FB_IOCTL_SCREENINFO    _IOR('r',  3, int) /* get screen info */
+#define PS3FB_IOCTL_ON            _IO('r', 4)        /* use IOCTL_FSEL */
+#define PS3FB_IOCTL_OFF           _IO('r', 5)        /* return to normal-flip */
+#define PS3FB_IOCTL_FSEL          _IOW('r', 6, int)  /* blit and flip request */
+
+#ifndef FBIO_WAITFORVSYNC
+#define FBIO_WAITFORVSYNC         _IOW('F', 0x20, __u32) /* wait for vsync */
+#endif
+
+struct ps3fb_ioctl_res {
+	__u32 xres; /* frame buffer x_size */
+	__u32 yres; /* frame buffer y_size */
+	__u32 xoff; /* margine x  */
+	__u32 yoff; /* margine y */
+	__u32 num_frames; /* num of frame buffers */
+};
+
+#endif /* _ASM_POWERPC_PS3FB_H_ */