diff options
| author | Jim Paris <jim@jtan.com> | 2009-01-06 11:32:10 +0000 |
|---|---|---|
| committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2009-01-08 16:25:14 +1100 |
| commit | cffb4add03b1fc83026b06dc3664279cfbf70155 (patch) | |
| tree | f9b2b351a3a330768b81919897f3be193fd9e88d /arch/powerpc | |
| parent | d2b4397bf87cf6547ca9fa75b6b84eada96c0848 (diff) | |
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: Vivien Chappelier <vivien.chappelier@free.fr>
Signed-off-by: Jim Paris <jim@jtan.com>
Acked-by: Geoff Levand <geoffrey.levand@am.sony.com>
Acked-by: David Woodhouse <David.Woodhouse@intel.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc')
| -rw-r--r-- | arch/powerpc/include/asm/ps3.h | 1 | ||||
| -rw-r--r-- | arch/powerpc/platforms/ps3/device-init.c | 37 |
2 files changed, 38 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/ps3.h b/arch/powerpc/include/asm/ps3.h index cff30c0ef1f..66b650532ad 100644 --- a/arch/powerpc/include/asm/ps3.h +++ b/arch/powerpc/include/asm/ps3.h @@ -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" diff --git a/arch/powerpc/platforms/ps3/device-init.c b/arch/powerpc/platforms/ps3/device-init.c index dbc124e0564..ca71a12b764 100644 --- a/arch/powerpc/platforms/ps3/device-init.c +++ b/arch/powerpc/platforms/ps3/device-init.c @@ -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; } |