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Commit f507cd22 authored by Geert Uytterhoeven's avatar Geert Uytterhoeven Committed by Benjamin Herrenschmidt
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ps3/block: Replace mtd/ps3vram by block/ps3vram 



Convert the PS3 Video RAM Storage Driver from an MTD driver to a plain block
device driver.

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

The new driver is ca. 50% faster for reading, and ca. 10% for writing.

Signed-off-by: default avatarGeert Uytterhoeven <Geert.Uytterhoeven@sonycom.com>
Acked-by: default avatarGeoff Levand <geoffrey.levand@am.sony.com>
Signed-off-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
parent 9ead6497

arch/powerpc/platforms/ps3/Kconfig

+7 −0
Original line number Diff line number Diff line
@@ -128,6 +128,13 @@ config PS3_FLASH 
	  be disabled on the kernel command line using "ps3flash=off", to

	  not allocate this fixed buffer.



config PS3_VRAM

	tristate "PS3 Video RAM Storage Driver"

	depends on FB_PS3=y && BLOCK && m

	help

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

	  storage or system swap.



config PS3_LPM

	tristate "PS3 Logical Performance Monitor support"

	depends on PPC_PS3

drivers/block/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -9,6 +9,7 @@ obj-$(CONFIG_MAC_FLOPPY) += swim3.o 
obj-$(CONFIG_BLK_DEV_FD)	+= floppy.o

obj-$(CONFIG_AMIGA_FLOPPY)	+= amiflop.o

obj-$(CONFIG_PS3_DISK)		+= ps3disk.o

obj-$(CONFIG_PS3_VRAM)		+= ps3vram.o

obj-$(CONFIG_ATARI_FLOPPY)	+= ataflop.o

obj-$(CONFIG_AMIGA_Z2RAM)	+= z2ram.o

obj-$(CONFIG_BLK_DEV_RAM)	+= brd.o

drivers/mtd/devices/ps3vram.c→drivers/block/ps3vram.c

+865 −0

File changed and moved.

Preview size limit exceeded, changes collapsed.

drivers/mtd/devices/Kconfig

+0 −7
Original line number Diff line number Diff line
@@ -120,13 +120,6 @@ 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

+0 −1
Original line number Diff line number Diff line
@@ -16,4 +16,3 @@ 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