Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit cffb4add authored by Jim Paris's avatar Jim Paris Committed by Benjamin Herrenschmidt
Browse files

mtd/ps3vram: Add ps3vram driver for accessing video RAM as MTD 



Add ps3vram driver, which exposes unused video RAM on the PS3 as a MTD
device suitable for storage or swap.  Fast data transfer is achieved
using a local cache in system RAM and DMA transfers via the GPU.

Signed-off-by: default avatarVivien Chappelier <vivien.chappelier@free.fr>
Signed-off-by: default avatarJim Paris <jim@jtan.com>
Acked-by: default avatarGeoff Levand <geoffrey.levand@am.sony.com>
Acked-by: default avatarDavid Woodhouse <David.Woodhouse@intel.com>
Signed-off-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
parent d2b4397b

MAINTAINERS

+6 −0
Original line number Diff line number Diff line
@@ -3484,6 +3484,12 @@ L: linuxppc-dev@ozlabs.org 
L:	cbe-oss-dev@ozlabs.org

S:	Supported



PS3VRAM DRIVER

P:	Jim Paris

M:	jim@jtan.com

L:	cbe-oss-dev@ozlabs.org

S:	Maintained



PVRUSB2 VIDEO4LINUX DRIVER

P:	Mike Isely

M:	isely@pobox.com

arch/powerpc/include/asm/ps3.h

+1 −0
Original line number Diff line number Diff line
@@ -320,6 +320,7 @@ enum ps3_match_id { 


enum ps3_match_sub_id {

	PS3_MATCH_SUB_ID_GPU_FB		= 1,

	PS3_MATCH_SUB_ID_GPU_RAMDISK	= 2,

};



#define PS3_MODULE_ALIAS_EHCI		"ps3:1:0"

arch/powerpc/platforms/ps3/device-init.c

+37 −0
Original line number Diff line number Diff line
@@ -518,6 +518,41 @@ fail_device_register: 
	return result;

}



static int __init ps3_register_ramdisk_device(void)

{

	int result;

	struct layout {

		struct ps3_system_bus_device dev;

	} *p;



	pr_debug(" -> %s:%d\n", __func__, __LINE__);



	p = kzalloc(sizeof(struct layout), GFP_KERNEL);



	if (!p)

		return -ENOMEM;



	p->dev.match_id = PS3_MATCH_ID_GPU;

	p->dev.match_sub_id = PS3_MATCH_SUB_ID_GPU_RAMDISK;

	p->dev.dev_type = PS3_DEVICE_TYPE_IOC0;



	result = ps3_system_bus_device_register(&p->dev);



	if (result) {

		pr_debug("%s:%d ps3_system_bus_device_register failed\n",

			__func__, __LINE__);

		goto fail_device_register;

	}



	pr_debug(" <- %s:%d\n", __func__, __LINE__);

	return 0;



fail_device_register:

	kfree(p);

	pr_debug(" <- %s:%d failed\n", __func__, __LINE__);

	return result;

}



/**

 * ps3_setup_dynamic_device - Setup a dynamic device from the repository

 */
@@ -946,6 +981,8 @@ static int __init ps3_register_devices(void) 


	ps3_register_lpm_devices();



	ps3_register_ramdisk_device();



	pr_debug(" <- %s:%d\n", __func__, __LINE__);

	return 0;

}

drivers/mtd/devices/Kconfig

+7 −0
Original line number Diff line number Diff line
@@ -120,6 +120,13 @@ config MTD_PHRAM 
	  doesn't have access to, memory beyond the mem=xxx limit, nvram,

	  memory on the video card, etc...



config MTD_PS3VRAM

	tristate "PS3 video RAM"

	depends on FB_PS3

	help

	  This driver allows you to use excess PS3 video RAM as volatile

	  storage or system swap.



config MTD_LART

	tristate "28F160xx flash driver for LART"

	depends on SA1100_LART

drivers/mtd/devices/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -16,3 +16,4 @@ obj-$(CONFIG_MTD_LART) += lart.o 
obj-$(CONFIG_MTD_BLOCK2MTD)	+= block2mtd.o

obj-$(CONFIG_MTD_DATAFLASH)	+= mtd_dataflash.o

obj-$(CONFIG_MTD_M25P80)	+= m25p80.o

obj-$(CONFIG_MTD_PS3VRAM)	+= ps3vram.o