--- /dev/null
+From: Jim Paris <jim@jtan.com>
+Subject: Add ps3vram driver, which exposes unused video RAM on the PS3 as a 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>
+CC: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com>
+CC: Geoff Levand <geoffrey.levand@am.sony.com>
+Signed-off-by: Jim Paris <jim@jtan.com>
+Signed-off-by: Stefan Assmann <sassmann@suse.de>
+---
+This version has been updated to work with PS3 firmware 2.50, and
+to use ps3_gpu_mutex.
+
+Please consider for 2.6.29.
+
+ MAINTAINERS | 6
+ arch/powerpc/include/asm/ps3.h | 1
+ arch/powerpc/platforms/ps3/device-init.c | 37 +
+ drivers/mtd/devices/Kconfig | 7
+ drivers/mtd/devices/Makefile | 1
+ MAINTAINERS | 6
+ arch/powerpc/include/asm/ps3.h | 1
+ arch/powerpc/platforms/ps3/device-init.c | 37 +
+ drivers/mtd/devices/Kconfig | 7
+ drivers/mtd/devices/Makefile | 1
+ drivers/mtd/devices/ps3vram.c | 776 +++++++++++++++++++++++++++++++
+ 6 files changed, 828 insertions(+)
+ create mode 100644 drivers/mtd/devices/ps3vram.c
+
+--- a/arch/powerpc/include/asm/ps3.h
++++ b/arch/powerpc/include/asm/ps3.h
+@@ -340,6 +340,7 @@ enum ps3_system_bus_device_type {
+ enum ps3_match_sub_id {
+ /* for PS3_MATCH_ID_GRAPHICS */
+ PS3_MATCH_SUB_ID_FB = 1,
++ PS3_MATCH_SUB_ID_RAMDISK = 2,
+ };
+
+ /**
+--- a/arch/powerpc/platforms/ps3/device-init.c
++++ b/arch/powerpc/platforms/ps3/device-init.c
+@@ -499,6 +499,41 @@ static int __init ps3_register_graphics_
+ 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_GRAPHICS;
++ p->dev.match_sub_id = PS3_MATCH_SUB_ID_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
+ */
+@@ -927,6 +962,8 @@ static int __init ps3_register_devices(v
+
+ ps3_register_lpm_devices();
+
++ ps3_register_ramdisk_device();
++
+ pr_debug(" <- %s:%d\n", __func__, __LINE__);
+ return 0;
+ }
+--- a/drivers/mtd/devices/Kconfig
++++ b/drivers/mtd/devices/Kconfig
+@@ -99,6 +99,13 @@ 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
+--- a/drivers/mtd/devices/Makefile
++++ b/drivers/mtd/devices/Makefile
+@@ -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
+--- /dev/null
++++ b/drivers/mtd/devices/ps3vram.c
+@@ -0,0 +1,776 @@
++/**
++ * ps3vram - Use extra PS3 video ram as MTD block device.
++ *
++ * Copyright (c) 2007-2008 Jim Paris <jim@jtan.com>
++ * Added support RSX DMA Vivien Chappelier <vivien.chappelier@free.fr>
++ */
++
++#include <linux/io.h>
++#include <linux/init.h>
++#include <linux/kernel.h>
++#include <linux/list.h>
++#include <linux/module.h>
++#include <linux/moduleparam.h>
++#include <linux/slab.h>
++#include <linux/version.h>
++#include <linux/gfp.h>
++#include <linux/delay.h>
++#include <linux/mtd/mtd.h>
++
++#include <asm/lv1call.h>
++#include <asm/ps3.h>
++
++#define DEVICE_NAME "ps3vram"
++
++#define XDR_BUF_SIZE (2 * 1024 * 1024) /* XDR buffer (must be 1MB aligned) */
++#define XDR_IOIF 0x0c000000
++
++#define FIFO_BASE XDR_IOIF
++#define FIFO_SIZE (64 * 1024)
++
++#define DMA_PAGE_SIZE (4 * 1024)
++
++#define CACHE_PAGE_SIZE (256 * 1024)
++#define CACHE_PAGE_COUNT ((XDR_BUF_SIZE - FIFO_SIZE) / CACHE_PAGE_SIZE)
++
++#define CACHE_OFFSET CACHE_PAGE_SIZE
++#define FIFO_OFFSET 0
++
++#define CTRL_PUT 0x10
++#define CTRL_GET 0x11
++#define CTRL_TOP 0x15
++
++#define UPLOAD_SUBCH 1
++#define DOWNLOAD_SUBCH 2
++
++#define NV_MEMORY_TO_MEMORY_FORMAT_OFFSET_IN 0x0000030c
++#define NV_MEMORY_TO_MEMORY_FORMAT_NOTIFY 0x00000104
++
++#define L1GPU_CONTEXT_ATTRIBUTE_FB_BLIT 0x601
++
++struct mtd_info ps3vram_mtd;
++
++#define CACHE_PAGE_PRESENT 1
++#define CACHE_PAGE_DIRTY 2
++
++#define dbg(fmt, args...) \
++ pr_debug("%s:%d " fmt "\n", __func__, __LINE__, ## args)
++
++struct ps3vram_tag {
++ unsigned int address;
++ unsigned int flags;
++};
++
++struct ps3vram_cache {
++ unsigned int page_count;
++ unsigned int page_size;
++ struct ps3vram_tag *tags;
++};
++
++struct ps3vram_priv {
++ uint64_t memory_handle;
++ uint64_t context_handle;
++ uint8_t *base;
++ uint32_t *ctrl;
++ uint32_t *reports;
++ uint8_t *xdr_buf;
++
++ uint32_t *fifo_base;
++ uint32_t *fifo_ptr;
++
++ struct ps3vram_cache cache;
++
++ /* Used to serialize cache/DMA operations */
++ struct mutex lock;
++};
++
++#define DMA_NOTIFIER_HANDLE_BASE 0x66604200 /* first DMA notifier handle */
++#define DMA_NOTIFIER_OFFSET_BASE 0x1000 /* first DMA notifier offset */
++#define DMA_NOTIFIER_SIZE 0x40
++
++#define NUM_NOTIFIERS 16
++
++#define NOTIFIER 7 /* notifier used for completion report */
++
++/* A trailing '-' means to subtract off ps3fb_videomemory.size */
++char *size = "256M-";
++module_param(size, charp, 0);
++MODULE_PARM_DESC(size, "memory size");
++
++static inline uint32_t *ps3vram_get_notifier(uint32_t *reports, int notifier)
++{
++ return (void *) reports +
++ DMA_NOTIFIER_OFFSET_BASE +
++ DMA_NOTIFIER_SIZE * notifier;
++}
++
++static void ps3vram_notifier_reset(struct mtd_info *mtd)
++{
++ int i;
++ struct ps3vram_priv *priv = mtd->priv;
++ uint32_t *notify = ps3vram_get_notifier(priv->reports, NOTIFIER);
++ for (i = 0; i < 4; i++)
++ notify[i] = 0xffffffff;
++}
++
++static int ps3vram_notifier_wait(struct mtd_info *mtd, int timeout_ms)
++{
++ struct ps3vram_priv *priv = mtd->priv;
++ uint32_t *notify = ps3vram_get_notifier(priv->reports, NOTIFIER);
++
++ timeout_ms *= 1000;
++
++ do {
++ if (notify[3] == 0)
++ return 0;
++
++ if (timeout_ms)
++ udelay(1);
++ } while (timeout_ms--);
++
++ return -1;
++}
++
++static void ps3vram_dump_ring(struct mtd_info *mtd)
++{
++ struct ps3vram_priv *priv = mtd->priv;
++ uint32_t *fifo;
++
++ pr_info("PUT = %08x GET = %08x\n", priv->ctrl[CTRL_PUT],
++ priv->ctrl[CTRL_GET]);
++ for (fifo = priv->fifo_base; fifo < priv->fifo_ptr; fifo++)
++ pr_info("%p: %08x\n", fifo, *fifo);
++}
++
++static void ps3vram_dump_reports(struct mtd_info *mtd)
++{
++ struct ps3vram_priv *priv = mtd->priv;
++ int i;
++
++ for (i = 0; i < NUM_NOTIFIERS; i++) {
++ uint32_t *n = ps3vram_get_notifier(priv->reports, i);
++ pr_info("%p: %08x\n", n, *n);
++ }
++}
++
++static void ps3vram_init_ring(struct mtd_info *mtd)
++{
++ struct ps3vram_priv *priv = mtd->priv;
++
++ priv->ctrl[CTRL_PUT] = FIFO_BASE + FIFO_OFFSET;
++ priv->ctrl[CTRL_GET] = FIFO_BASE + FIFO_OFFSET;
++}
++
++static int ps3vram_wait_ring(struct mtd_info *mtd, int timeout)
++{
++ struct ps3vram_priv *priv = mtd->priv;
++
++ /* wait until setup commands are processed */
++ timeout *= 1000;
++ while (--timeout) {
++ if (priv->ctrl[CTRL_PUT] == priv->ctrl[CTRL_GET])
++ break;
++ udelay(1);
++ }
++ if (timeout == 0) {
++ pr_err("FIFO timeout (%08x/%08x/%08x)\n", priv->ctrl[CTRL_PUT],
++ priv->ctrl[CTRL_GET], priv->ctrl[CTRL_TOP]);
++ return -ETIMEDOUT;
++ }
++
++ return 0;
++}
++
++static inline void ps3vram_out_ring(struct ps3vram_priv *priv, uint32_t data)
++{
++ *(priv->fifo_ptr)++ = data;
++}
++
++static inline void ps3vram_begin_ring(struct ps3vram_priv *priv, uint32_t chan,
++ uint32_t tag, uint32_t size)
++{
++ ps3vram_out_ring(priv, (size << 18) | (chan << 13) | tag);
++}
++
++static void ps3vram_rewind_ring(struct mtd_info *mtd)
++{
++ struct ps3vram_priv *priv = mtd->priv;
++ u64 status;
++
++ ps3vram_out_ring(priv, 0x20000000 | (FIFO_BASE + FIFO_OFFSET));
++
++ priv->ctrl[CTRL_PUT] = FIFO_BASE + FIFO_OFFSET;
++
++ /* asking the HV for a blit will kick the fifo */
++ status = lv1_gpu_context_attribute(priv->context_handle,
++ L1GPU_CONTEXT_ATTRIBUTE_FB_BLIT,
++ 0, 0, 0, 0);
++ if (status)
++ pr_err("ps3vram: lv1_gpu_context_attribute FB_BLIT failed\n");
++
++ priv->fifo_ptr = priv->fifo_base;
++}
++
++static void ps3vram_fire_ring(struct mtd_info *mtd)
++{
++ struct ps3vram_priv *priv = mtd->priv;
++ u64 status;
++
++ mutex_lock(&ps3_gpu_mutex);
++
++ priv->ctrl[CTRL_PUT] = FIFO_BASE + FIFO_OFFSET +
++ (priv->fifo_ptr - priv->fifo_base) * sizeof(uint32_t);
++
++ /* asking the HV for a blit will kick the fifo */
++ status = lv1_gpu_context_attribute(priv->context_handle,
++ L1GPU_CONTEXT_ATTRIBUTE_FB_BLIT,
++ 0, 0, 0, 0);
++ if (status)
++ pr_err("ps3vram: lv1_gpu_context_attribute FB_BLIT failed\n");
++
++ if ((priv->fifo_ptr - priv->fifo_base) * sizeof(uint32_t) >
++ FIFO_SIZE - 1024) {
++ dbg("fifo full, rewinding");
++ ps3vram_wait_ring(mtd, 200);
++ ps3vram_rewind_ring(mtd);
++ }
++
++ mutex_unlock(&ps3_gpu_mutex);
++}
++
++static void ps3vram_bind(struct mtd_info *mtd)
++{
++ struct ps3vram_priv *priv = mtd->priv;
++
++ ps3vram_begin_ring(priv, UPLOAD_SUBCH, 0, 1);
++ ps3vram_out_ring(priv, 0x31337303);
++ ps3vram_begin_ring(priv, UPLOAD_SUBCH, 0x180, 3);
++ ps3vram_out_ring(priv, DMA_NOTIFIER_HANDLE_BASE + NOTIFIER);
++ ps3vram_out_ring(priv, 0xfeed0001); /* DMA system RAM instance */
++ ps3vram_out_ring(priv, 0xfeed0000); /* DMA video RAM instance */
++
++ ps3vram_begin_ring(priv, DOWNLOAD_SUBCH, 0, 1);
++ ps3vram_out_ring(priv, 0x3137c0de);
++ ps3vram_begin_ring(priv, DOWNLOAD_SUBCH, 0x180, 3);
++ ps3vram_out_ring(priv, DMA_NOTIFIER_HANDLE_BASE + NOTIFIER);
++ ps3vram_out_ring(priv, 0xfeed0000); /* DMA video RAM instance */
++ ps3vram_out_ring(priv, 0xfeed0001); /* DMA system RAM instance */
++
++ ps3vram_fire_ring(mtd);
++}
++
++static int ps3vram_upload(struct mtd_info *mtd, unsigned int src_offset,
++ unsigned int dst_offset, int len, int count)
++{
++ struct ps3vram_priv *priv = mtd->priv;
++
++ ps3vram_begin_ring(priv, UPLOAD_SUBCH,
++ NV_MEMORY_TO_MEMORY_FORMAT_OFFSET_IN, 8);
++ ps3vram_out_ring(priv, XDR_IOIF + src_offset);
++ ps3vram_out_ring(priv, dst_offset);
++ ps3vram_out_ring(priv, len);
++ ps3vram_out_ring(priv, len);
++ ps3vram_out_ring(priv, len);
++ ps3vram_out_ring(priv, count);
++ ps3vram_out_ring(priv, (1 << 8) | 1);
++ ps3vram_out_ring(priv, 0);
++
++ ps3vram_notifier_reset(mtd);
++ ps3vram_begin_ring(priv, UPLOAD_SUBCH,
++ NV_MEMORY_TO_MEMORY_FORMAT_NOTIFY, 1);
++ ps3vram_out_ring(priv, 0);
++ ps3vram_begin_ring(priv, UPLOAD_SUBCH, 0x100, 1);
++ ps3vram_out_ring(priv, 0);
++ ps3vram_fire_ring(mtd);
++ if (ps3vram_notifier_wait(mtd, 200) < 0) {
++ pr_err("notifier timeout\n");
++ ps3vram_dump_ring(mtd);
++ ps3vram_dump_reports(mtd);
++ return -1;
++ }
++
++ return 0;
++}
++
++static int ps3vram_download(struct mtd_info *mtd, unsigned int src_offset,
++ unsigned int dst_offset, int len, int count)
++{
++ struct ps3vram_priv *priv = mtd->priv;
++
++ ps3vram_begin_ring(priv, DOWNLOAD_SUBCH,
++ NV_MEMORY_TO_MEMORY_FORMAT_OFFSET_IN, 8);
++ ps3vram_out_ring(priv, src_offset);
++ ps3vram_out_ring(priv, XDR_IOIF + dst_offset);
++ ps3vram_out_ring(priv, len);
++ ps3vram_out_ring(priv, len);
++ ps3vram_out_ring(priv, len);
++ ps3vram_out_ring(priv, count);
++ ps3vram_out_ring(priv, (1 << 8) | 1);
++ ps3vram_out_ring(priv, 0);
++
++ ps3vram_notifier_reset(mtd);
++ ps3vram_begin_ring(priv, DOWNLOAD_SUBCH,
++ NV_MEMORY_TO_MEMORY_FORMAT_NOTIFY, 1);
++ ps3vram_out_ring(priv, 0);
++ ps3vram_begin_ring(priv, DOWNLOAD_SUBCH, 0x100, 1);
++ ps3vram_out_ring(priv, 0);
++ ps3vram_fire_ring(mtd);
++ if (ps3vram_notifier_wait(mtd, 200) < 0) {
++ pr_err("notifier timeout\n");
++ ps3vram_dump_ring(mtd);
++ ps3vram_dump_reports(mtd);
++ return -1;
++ }
++
++ return 0;
++}
++
++static void ps3vram_cache_evict(struct mtd_info *mtd, int entry)
++{
++ struct ps3vram_priv *priv = mtd->priv;
++ struct ps3vram_cache *cache = &priv->cache;
++
++ if (cache->tags[entry].flags & CACHE_PAGE_DIRTY) {
++ dbg("flushing %d : 0x%08x", entry, cache->tags[entry].address);
++ if (ps3vram_upload(mtd,
++ CACHE_OFFSET + entry * cache->page_size,
++ cache->tags[entry].address,
++ DMA_PAGE_SIZE,
++ cache->page_size / DMA_PAGE_SIZE) < 0) {
++ pr_err("failed to upload from 0x%x to 0x%x size 0x%x\n",
++ entry * cache->page_size,
++ cache->tags[entry].address,
++ cache->page_size);
++ }
++ cache->tags[entry].flags &= ~CACHE_PAGE_DIRTY;
++ }
++}
++
++static void ps3vram_cache_load(struct mtd_info *mtd, int entry,
++ unsigned int address)
++{
++ struct ps3vram_priv *priv = mtd->priv;
++ struct ps3vram_cache *cache = &priv->cache;
++
++ dbg("fetching %d : 0x%08x", entry, address);
++ if (ps3vram_download(mtd,
++ address,
++ CACHE_OFFSET + entry * cache->page_size,
++ DMA_PAGE_SIZE,
++ cache->page_size / DMA_PAGE_SIZE) < 0) {
++ pr_err("failed to download from 0x%x to 0x%x size 0x%x\n",
++ address,
++ entry * cache->page_size,
++ cache->page_size);
++ }
++
++ cache->tags[entry].address = address;
++ cache->tags[entry].flags |= CACHE_PAGE_PRESENT;
++}
++
++
++static void ps3vram_cache_flush(struct mtd_info *mtd)
++{
++ struct ps3vram_priv *priv = mtd->priv;
++ struct ps3vram_cache *cache = &priv->cache;
++ int i;
++
++ dbg("FLUSH");
++ for (i = 0; i < cache->page_count; i++) {
++ ps3vram_cache_evict(mtd, i);
++ cache->tags[i].flags = 0;
++ }
++}
++
++static unsigned int ps3vram_cache_match(struct mtd_info *mtd, loff_t address)
++{
++ struct ps3vram_priv *priv = mtd->priv;
++ struct ps3vram_cache *cache = &priv->cache;
++ unsigned int base;
++ unsigned int offset;
++ int i;
++ static int counter;
++
++ offset = (unsigned int) (address & (cache->page_size - 1));
++ base = (unsigned int) (address - offset);
++
++ /* fully associative check */
++ for (i = 0; i < cache->page_count; i++) {
++ if ((cache->tags[i].flags & CACHE_PAGE_PRESENT) &&
++ cache->tags[i].address == base) {
++ dbg("found entry %d : 0x%08x",
++ i, cache->tags[i].address);
++ return i;
++ }
++ }
++
++ /* choose a random entry */
++ i = (jiffies + (counter++)) % cache->page_count;
++ dbg("using cache entry %d", i);
++
++ ps3vram_cache_evict(mtd, i);
++ ps3vram_cache_load(mtd, i, base);
++
++ return i;
++}
++
++static int ps3vram_cache_init(struct mtd_info *mtd)
++{
++ struct ps3vram_priv *priv = mtd->priv;
++
++ pr_info("creating cache: %d entries, %d bytes pages\n",
++ CACHE_PAGE_COUNT, CACHE_PAGE_SIZE);
++
++ priv->cache.page_count = CACHE_PAGE_COUNT;
++ priv->cache.page_size = CACHE_PAGE_SIZE;
++ priv->cache.tags = kzalloc(sizeof(struct ps3vram_tag) *
++ CACHE_PAGE_COUNT, GFP_KERNEL);
++ if (priv->cache.tags == NULL) {
++ pr_err("could not allocate cache tags\n");
++ return -ENOMEM;
++ }
++
++ return 0;
++}
++
++static void ps3vram_cache_cleanup(struct mtd_info *mtd)
++{
++ struct ps3vram_priv *priv = mtd->priv;
++
++ ps3vram_cache_flush(mtd);
++ kfree(priv->cache.tags);
++}
++
++static int ps3vram_erase(struct mtd_info *mtd, struct erase_info *instr)
++{
++ struct ps3vram_priv *priv = mtd->priv;
++
++ if (instr->addr + instr->len > mtd->size)
++ return -EINVAL;
++
++ mutex_lock(&priv->lock);
++
++ ps3vram_cache_flush(mtd);
++
++ /* Set bytes to 0xFF */
++ memset(priv->base + instr->addr, 0xFF, instr->len);
++
++ mutex_unlock(&priv->lock);
++
++ instr->state = MTD_ERASE_DONE;
++ mtd_erase_callback(instr);
++
++ return 0;
++}
++
++
++static int ps3vram_read(struct mtd_info *mtd, loff_t from, size_t len,
++ size_t *retlen, u_char *buf)
++{
++ struct ps3vram_priv *priv = mtd->priv;
++ unsigned int cached, count;
++
++ dbg("from = 0x%08x len = 0x%zx", (unsigned int) from, len);
++
++ if (from >= mtd->size)
++ return -EINVAL;
++
++ if (len > mtd->size - from)
++ len = mtd->size - from;
++
++ /* Copy from vram to buf */
++ count = len;
++ while (count) {
++ unsigned int offset, avail;
++ unsigned int entry;
++
++ offset = (unsigned int) (from & (priv->cache.page_size - 1));
++ avail = priv->cache.page_size - offset;
++
++ mutex_lock(&priv->lock);
++
++ entry = ps3vram_cache_match(mtd, from);
++ cached = CACHE_OFFSET + entry * priv->cache.page_size + offset;
++
++ dbg("from=%08x cached=%08x offset=%08x avail=%08x count=%08x",
++ (unsigned)from, cached, offset, avail, count);
++
++ if (avail > count)
++ avail = count;
++ memcpy(buf, priv->xdr_buf + cached, avail);
++
++ mutex_unlock(&priv->lock);
++
++ buf += avail;
++ count -= avail;
++ from += avail;
++ }
++
++ *retlen = len;
++ return 0;
++}
++
++static int ps3vram_write(struct mtd_info *mtd, loff_t to, size_t len,
++ size_t *retlen, const u_char *buf)
++{
++ struct ps3vram_priv *priv = mtd->priv;
++ unsigned int cached, count;
++
++ if (to >= mtd->size)
++ return -EINVAL;
++
++ if (len > mtd->size - to)
++ len = mtd->size - to;
++
++ /* Copy from buf to vram */
++ count = len;
++ while (count) {
++ unsigned int offset, avail;
++ unsigned int entry;
++
++ offset = (unsigned int) (to & (priv->cache.page_size - 1));
++ avail = priv->cache.page_size - offset;
++
++ mutex_lock(&priv->lock);
++
++ entry = ps3vram_cache_match(mtd, to);
++ cached = CACHE_OFFSET + entry * priv->cache.page_size + offset;
++
++ dbg("to=%08x cached=%08x offset=%08x avail=%08x count=%08x",
++ (unsigned) to, cached, offset, avail, count);
++
++ if (avail > count)
++ avail = count;
++ memcpy(priv->xdr_buf + cached, buf, avail);
++
++ priv->cache.tags[entry].flags |= CACHE_PAGE_DIRTY;
++
++ mutex_unlock(&priv->lock);
++
++ buf += avail;
++ count -= avail;
++ to += avail;
++ }
++
++ *retlen = len;
++ return 0;
++}
++
++static int __devinit ps3vram_probe(struct ps3_system_bus_device *dev)
++{
++ struct ps3vram_priv *priv;
++ uint64_t status;
++ uint64_t ddr_lpar, ctrl_lpar, info_lpar, reports_lpar;
++ int64_t ddr_size;
++ uint64_t reports_size;
++ int ret = -ENOMEM;
++ char *rest;
++
++ ret = -EIO;
++ ps3vram_mtd.priv = kzalloc(sizeof(struct ps3vram_priv), GFP_KERNEL);
++ if (!ps3vram_mtd.priv)
++ goto out;
++ priv = ps3vram_mtd.priv;
++
++ mutex_init(&priv->lock);
++
++ /* Allocate XDR buffer (1MB aligned) */
++ priv->xdr_buf = (uint8_t *) __get_free_pages(GFP_KERNEL,
++ get_order(XDR_BUF_SIZE));
++ if (priv->xdr_buf == NULL) {
++ pr_err("ps3vram: could not allocate XDR buffer\n");
++ ret = -ENOMEM;
++ goto out_free_priv;
++ }
++
++ /* Put FIFO at begginning of XDR buffer */
++ priv->fifo_base = (uint32_t *) (priv->xdr_buf + FIFO_OFFSET);
++ priv->fifo_ptr = priv->fifo_base;
++
++ /* XXX: Need to open GPU, in case ps3fb or snd_ps3 aren't loaded */
++ if (ps3_open_hv_device(dev)) {
++ pr_err("ps3vram: ps3_open_hv_device failed\n");
++ ret = -EAGAIN;
++ goto out_close_gpu;
++ }
++
++ /* Request memory */
++ status = -1;
++ ddr_size = memparse(size, &rest);
++ if (*rest == '-')
++ ddr_size -= ps3fb_videomemory.size;
++ ddr_size = ALIGN(ddr_size, 1024*1024);
++ if (ddr_size <= 0) {
++ printk(KERN_ERR "ps3vram: specified size is too small\n");
++ ret = -EINVAL;
++ goto out_close_gpu;
++ }
++
++ while (ddr_size > 0) {
++ status = lv1_gpu_memory_allocate(ddr_size, 0, 0, 0, 0,
++ &priv->memory_handle,
++ &ddr_lpar);
++ if (status == 0)
++ break;
++ ddr_size -= 1024*1024;
++ }
++ if (status != 0 || ddr_size <= 0) {
++ pr_err("ps3vram: lv1_gpu_memory_allocate failed\n");
++ ret = -ENOMEM;
++ goto out_free_xdr_buf;
++ }
++ pr_info("ps3vram: allocated %u MiB of DDR memory\n",
++ (unsigned int) (ddr_size / 1024 / 1024));
++
++ /* Request context */
++ status = lv1_gpu_context_allocate(priv->memory_handle,
++ 0,
++ &priv->context_handle,
++ &ctrl_lpar,
++ &info_lpar,
++ &reports_lpar,
++ &reports_size);
++ if (status) {
++ pr_err("ps3vram: lv1_gpu_context_allocate failed\n");
++ ret = -ENOMEM;
++ goto out_free_memory;
++ }
++
++ /* Map XDR buffer to RSX */
++ status = lv1_gpu_context_iomap(priv->context_handle, XDR_IOIF,
++ ps3_mm_phys_to_lpar(__pa(priv->xdr_buf)),
++ XDR_BUF_SIZE, 0);
++ if (status) {
++ pr_err("ps3vram: lv1_gpu_context_iomap failed\n");
++ ret = -ENOMEM;
++ goto out_free_context;
++ }
++
++ priv->base = ioremap(ddr_lpar, ddr_size);
++ if (!priv->base) {
++ pr_err("ps3vram: ioremap failed\n");
++ ret = -ENOMEM;
++ goto out_free_context;
++ }
++
++ priv->ctrl = ioremap(ctrl_lpar, 64 * 1024);
++ if (!priv->ctrl) {
++ pr_err("ps3vram: ioremap failed\n");
++ ret = -ENOMEM;
++ goto out_unmap_vram;
++ }
++
++ priv->reports = ioremap(reports_lpar, reports_size);
++ if (!priv->reports) {
++ pr_err("ps3vram: ioremap failed\n");
++ ret = -ENOMEM;
++ goto out_unmap_ctrl;
++ }
++
++ mutex_lock(&ps3_gpu_mutex);
++ ps3vram_init_ring(&ps3vram_mtd);
++ mutex_unlock(&ps3_gpu_mutex);
++
++ ps3vram_mtd.name = "ps3vram";
++ ps3vram_mtd.size = ddr_size;
++ ps3vram_mtd.flags = MTD_CAP_RAM;
++ ps3vram_mtd.erase = ps3vram_erase;
++ ps3vram_mtd.point = NULL;
++ ps3vram_mtd.unpoint = NULL;
++ ps3vram_mtd.read = ps3vram_read;
++ ps3vram_mtd.write = ps3vram_write;
++ ps3vram_mtd.owner = THIS_MODULE;
++ ps3vram_mtd.type = MTD_RAM;
++ ps3vram_mtd.erasesize = CACHE_PAGE_SIZE;
++ ps3vram_mtd.writesize = 1;
++
++ ps3vram_bind(&ps3vram_mtd);
++
++ mutex_lock(&ps3_gpu_mutex);
++ ret = ps3vram_wait_ring(&ps3vram_mtd, 100);
++ mutex_unlock(&ps3_gpu_mutex);
++ if (ret < 0) {
++ pr_err("failed to initialize channels\n");
++ ret = -ETIMEDOUT;
++ goto out_unmap_reports;
++ }
++
++ ps3vram_cache_init(&ps3vram_mtd);
++
++ if (add_mtd_device(&ps3vram_mtd)) {
++ pr_err("ps3vram: failed to register device\n");
++ ret = -EAGAIN;
++ goto out_cache_cleanup;
++ }
++
++ pr_info("ps3vram mtd device registered, %lu bytes\n", ddr_size);
++ return 0;
++
++out_cache_cleanup:
++ ps3vram_cache_cleanup(&ps3vram_mtd);
++out_unmap_reports:
++ iounmap(priv->reports);
++out_unmap_ctrl:
++ iounmap(priv->ctrl);
++out_unmap_vram:
++ iounmap(priv->base);
++out_free_context:
++ lv1_gpu_context_free(priv->context_handle);
++out_free_memory:
++ lv1_gpu_memory_free(priv->memory_handle);
++out_close_gpu:
++ ps3_close_hv_device(dev);
++out_free_xdr_buf:
++ free_pages((unsigned long) priv->xdr_buf, get_order(XDR_BUF_SIZE));
++out_free_priv:
++ kfree(ps3vram_mtd.priv);
++ ps3vram_mtd.priv = NULL;
++out:
++ return ret;
++}
++
++static int ps3vram_shutdown(struct ps3_system_bus_device *dev)
++{
++ struct ps3vram_priv *priv;
++
++ priv = ps3vram_mtd.priv;
++
++ del_mtd_device(&ps3vram_mtd);
++ ps3vram_cache_cleanup(&ps3vram_mtd);
++ iounmap(priv->reports);
++ iounmap(priv->ctrl);
++ iounmap(priv->base);
++ lv1_gpu_context_free(priv->context_handle);
++ lv1_gpu_memory_free(priv->memory_handle);
++ ps3_close_hv_device(dev);
++ free_pages((unsigned long) priv->xdr_buf, get_order(XDR_BUF_SIZE));
++ kfree(priv);
++ return 0;
++}
++
++static struct ps3_system_bus_driver ps3vram_driver = {
++ .match_id = PS3_MATCH_ID_GRAPHICS,
++ .match_sub_id = PS3_MATCH_SUB_ID_RAMDISK,
++ .core.name = DEVICE_NAME,
++ .core.owner = THIS_MODULE,
++ .probe = ps3vram_probe,
++ .remove = ps3vram_shutdown,
++ .shutdown = ps3vram_shutdown,
++};
++
++static int __init ps3vram_init(void)
++{
++ return ps3_system_bus_driver_register(&ps3vram_driver);
++}
++
++static void __exit ps3vram_exit(void)
++{
++ ps3_system_bus_driver_unregister(&ps3vram_driver);
++}
++
++module_init(ps3vram_init);
++module_exit(ps3vram_exit);
++
++MODULE_LICENSE("GPL");
++MODULE_AUTHOR("Jim Paris <jim@jtan.com>");
++MODULE_DESCRIPTION("MTD driver for PS3 video RAM");
+--- a/MAINTAINERS
++++ b/MAINTAINERS
+@@ -3353,6 +3353,12 @@ 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
projects / people / teissler / ipfire-2.x.git / blobdiff