+From f507cd22035fdadd5dbb476dd05e9e7ee21c3b84 Mon Sep 17 00:00:00 2001
+From: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com>
+Date: Fri, 6 Mar 2009 02:54:09 +0000
+Subject: [PATCH] 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: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com>
+Acked-by: Geoff Levand <geoffrey.levand@am.sony.com>
+Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
+---
+ arch/powerpc/platforms/ps3/Kconfig | 7 +
+ drivers/block/Makefile | 1 +
+ drivers/block/ps3vram.c | 865 ++++++++++++++++++++++++++++++++++++
+ drivers/mtd/devices/Kconfig | 7 -
+ drivers/mtd/devices/Makefile | 1 -
+ drivers/mtd/devices/ps3vram.c | 768 --------------------------------
+ 6 files changed, 873 insertions(+), 776 deletions(-)
+ create mode 100644 drivers/block/ps3vram.c
+ delete mode 100644 drivers/mtd/devices/ps3vram.c
+
+diff --git a/arch/powerpc/platforms/ps3/Kconfig b/arch/powerpc/platforms/ps3/Kconfig
+index 920cf7a..740ef56 100644
+--- a/arch/powerpc/platforms/ps3/Kconfig
++++ b/arch/powerpc/platforms/ps3/Kconfig
+@@ -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
+diff --git a/drivers/block/Makefile b/drivers/block/Makefile
+index 204332b..87e120e 100644
+--- a/drivers/block/Makefile
++++ b/drivers/block/Makefile
+@@ -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
+diff --git a/drivers/block/ps3vram.c b/drivers/block/ps3vram.c
+new file mode 100644
+index 0000000..393ed67
+--- /dev/null
++++ b/drivers/block/ps3vram.c
+@@ -0,0 +1,865 @@
++/*
++ * ps3vram - Use extra PS3 video ram as MTD block device.
++ *
++ * Copyright 2009 Sony Corporation
++ *
++ * Based on the MTD ps3vram driver, which is
++ * Copyright (c) 2007-2008 Jim Paris <jim@jtan.com>
++ * Added support RSX DMA Vivien Chappelier <vivien.chappelier@free.fr>
++ */
++
++#include <linux/blkdev.h>
++#include <linux/delay.h>
++#include <linux/proc_fs.h>
++#include <linux/seq_file.h>
++
++#include <asm/firmware.h>
++#include <asm/lv1call.h>
++#include <asm/ps3.h>
++
++
++#define DEVICE_NAME "ps3vram"
++
++
++#define XDR_BUF_SIZE (2 * 1024 * 1024) /* XDR buffer (must be 1MiB 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
++
++#define CACHE_PAGE_PRESENT 1
++#define CACHE_PAGE_DIRTY 2
++
++struct ps3vram_tag {
++ unsigned int address;
++ unsigned int flags;
++};
++
++struct ps3vram_cache {
++ unsigned int page_count;
++ unsigned int page_size;
++ struct ps3vram_tag *tags;
++ unsigned int hit;
++ unsigned int miss;
++};
++
++struct ps3vram_priv {
++ struct request_queue *queue;
++ struct gendisk *gendisk;
++
++ u64 size;
++
++ u64 memory_handle;
++ u64 context_handle;
++ u32 *ctrl;
++ u32 *reports;
++ u8 __iomem *ddr_base;
++ u8 *xdr_buf;
++
++ u32 *fifo_base;
++ u32 *fifo_ptr;
++
++ struct ps3vram_cache cache;
++
++ /* Used to serialize cache/DMA operations */
++ struct mutex lock;
++};
++
++
++static int ps3vram_major;
++
++
++static struct block_device_operations ps3vram_fops = {
++ .owner = THIS_MODULE,
++};
++
++
++#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 NOTIFIER 7 /* notifier used for completion report */
++
++static char *size = "256M";
++module_param(size, charp, 0);
++MODULE_PARM_DESC(size, "memory size");
++
++static u32 *ps3vram_get_notifier(u32 *reports, int notifier)
++{
++ return (void *)reports + DMA_NOTIFIER_OFFSET_BASE +
++ DMA_NOTIFIER_SIZE * notifier;
++}
++
++static void ps3vram_notifier_reset(struct ps3_system_bus_device *dev)
++{
++ struct ps3vram_priv *priv = dev->core.driver_data;
++ u32 *notify = ps3vram_get_notifier(priv->reports, NOTIFIER);
++ int i;
++
++ for (i = 0; i < 4; i++)
++ notify[i] = 0xffffffff;
++}
++
++static int ps3vram_notifier_wait(struct ps3_system_bus_device *dev,
++ unsigned int timeout_ms)
++{
++ struct ps3vram_priv *priv = dev->core.driver_data;
++ u32 *notify = ps3vram_get_notifier(priv->reports, NOTIFIER);
++ unsigned long timeout = jiffies + msecs_to_jiffies(timeout_ms);
++
++ do {
++ if (!notify[3])
++ return 0;
++ msleep(1);
++ } while (time_before(jiffies, timeout));
++
++ return -ETIMEDOUT;
++}
++
++static void ps3vram_init_ring(struct ps3_system_bus_device *dev)
++{
++ struct ps3vram_priv *priv = dev->core.driver_data;
++
++ priv->ctrl[CTRL_PUT] = FIFO_BASE + FIFO_OFFSET;
++ priv->ctrl[CTRL_GET] = FIFO_BASE + FIFO_OFFSET;
++}
++
++static int ps3vram_wait_ring(struct ps3_system_bus_device *dev,
++ unsigned int timeout_ms)
++{
++ struct ps3vram_priv *priv = dev->core.driver_data;
++ unsigned long timeout = jiffies + msecs_to_jiffies(timeout_ms);
++
++ do {
++ if (priv->ctrl[CTRL_PUT] == priv->ctrl[CTRL_GET])
++ return 0;
++ msleep(1);
++ } while (time_before(jiffies, timeout));
++
++ dev_warn(&dev->core, "FIFO timeout (%08x/%08x/%08x)\n",
++ priv->ctrl[CTRL_PUT], priv->ctrl[CTRL_GET],
++ priv->ctrl[CTRL_TOP]);
++
++ return -ETIMEDOUT;
++}
++
++static void ps3vram_out_ring(struct ps3vram_priv *priv, u32 data)
++{
++ *(priv->fifo_ptr)++ = data;
++}
++
++static void ps3vram_begin_ring(struct ps3vram_priv *priv, u32 chan, u32 tag,
++ u32 size)
++{
++ ps3vram_out_ring(priv, (size << 18) | (chan << 13) | tag);
++}
++
++static void ps3vram_rewind_ring(struct ps3_system_bus_device *dev)
++{
++ struct ps3vram_priv *priv = dev->core.driver_data;
++ int 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)
++ dev_err(&dev->core,
++ "%s: lv1_gpu_context_attribute failed %d\n", __func__,
++ status);
++
++ priv->fifo_ptr = priv->fifo_base;
++}
++
++static void ps3vram_fire_ring(struct ps3_system_bus_device *dev)
++{
++ struct ps3vram_priv *priv = dev->core.driver_data;
++ int status;
++
++ mutex_lock(&ps3_gpu_mutex);
++
++ priv->ctrl[CTRL_PUT] = FIFO_BASE + FIFO_OFFSET +
++ (priv->fifo_ptr - priv->fifo_base) * sizeof(u32);
++
++ /* 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)
++ dev_err(&dev->core,
++ "%s: lv1_gpu_context_attribute failed %d\n", __func__,
++ status);
++
++ if ((priv->fifo_ptr - priv->fifo_base) * sizeof(u32) >
++ FIFO_SIZE - 1024) {
++ dev_dbg(&dev->core, "FIFO full, rewinding\n");
++ ps3vram_wait_ring(dev, 200);
++ ps3vram_rewind_ring(dev);
++ }
++
++ mutex_unlock(&ps3_gpu_mutex);
++}
++
++static void ps3vram_bind(struct ps3_system_bus_device *dev)
++{
++ struct ps3vram_priv *priv = dev->core.driver_data;
++
++ 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(dev);
++}
++
++static int ps3vram_upload(struct ps3_system_bus_device *dev,
++ unsigned int src_offset, unsigned int dst_offset,
++ int len, int count)
++{
++ struct ps3vram_priv *priv = dev->core.driver_data;
++
++ 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(dev);
++ 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(dev);
++ if (ps3vram_notifier_wait(dev, 200) < 0) {
++ dev_warn(&dev->core, "%s: Notifier timeout\n", __func__);
++ return -1;
++ }
++
++ return 0;
++}
++
++static int ps3vram_download(struct ps3_system_bus_device *dev,
++ unsigned int src_offset, unsigned int dst_offset,
++ int len, int count)
++{
++ struct ps3vram_priv *priv = dev->core.driver_data;
++
++ 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(dev);
++ 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(dev);
++ if (ps3vram_notifier_wait(dev, 200) < 0) {
++ dev_warn(&dev->core, "%s: Notifier timeout\n", __func__);
++ return -1;
++ }
++
++ return 0;
++}
++
++static void ps3vram_cache_evict(struct ps3_system_bus_device *dev, int entry)
++{
++ struct ps3vram_priv *priv = dev->core.driver_data;
++ struct ps3vram_cache *cache = &priv->cache;
++
++ if (!(cache->tags[entry].flags & CACHE_PAGE_DIRTY))
++ return;
++
++ dev_dbg(&dev->core, "Flushing %d: 0x%08x\n", entry,
++ cache->tags[entry].address);
++ if (ps3vram_upload(dev, CACHE_OFFSET + entry * cache->page_size,
++ cache->tags[entry].address, DMA_PAGE_SIZE,
++ cache->page_size / DMA_PAGE_SIZE) < 0) {
++ dev_err(&dev->core,
++ "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 ps3_system_bus_device *dev, int entry,
++ unsigned int address)
++{
++ struct ps3vram_priv *priv = dev->core.driver_data;
++ struct ps3vram_cache *cache = &priv->cache;
++
++ dev_dbg(&dev->core, "Fetching %d: 0x%08x\n", entry, address);
++ if (ps3vram_download(dev, address,
++ CACHE_OFFSET + entry * cache->page_size,
++ DMA_PAGE_SIZE,
++ cache->page_size / DMA_PAGE_SIZE) < 0) {
++ dev_err(&dev->core,
++ "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 ps3_system_bus_device *dev)
++{
++ struct ps3vram_priv *priv = dev->core.driver_data;
++ struct ps3vram_cache *cache = &priv->cache;
++ int i;
++
++ dev_dbg(&dev->core, "FLUSH\n");
++ for (i = 0; i < cache->page_count; i++) {
++ ps3vram_cache_evict(dev, i);
++ cache->tags[i].flags = 0;
++ }
++}
++
++static unsigned int ps3vram_cache_match(struct ps3_system_bus_device *dev,
++ loff_t address)
++{
++ struct ps3vram_priv *priv = dev->core.driver_data;
++ 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) {
++ cache->hit++;
++ dev_dbg(&dev->core, "Found entry %d: 0x%08x\n", i,
++ cache->tags[i].address);
++ return i;
++ }
++ }
++
++ /* choose a random entry */
++ i = (jiffies + (counter++)) % cache->page_count;
++ dev_dbg(&dev->core, "Using entry %d\n", i);
++
++ ps3vram_cache_evict(dev, i);
++ ps3vram_cache_load(dev, i, base);
++
++ cache->miss++;
++ return i;
++}
++
++static int ps3vram_cache_init(struct ps3_system_bus_device *dev)
++{
++ struct ps3vram_priv *priv = dev->core.driver_data;
++
++ 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) {
++ dev_err(&dev->core, "Could not allocate cache tags\n");
++ return -ENOMEM;
++ }
++
++ dev_info(&dev->core, "Created ram cache: %d entries, %d KiB each\n",
++ CACHE_PAGE_COUNT, CACHE_PAGE_SIZE / 1024);
++
++ return 0;
++}
++
++static void ps3vram_cache_cleanup(struct ps3_system_bus_device *dev)
++{
++ struct ps3vram_priv *priv = dev->core.driver_data;
++
++ ps3vram_cache_flush(dev);
++ kfree(priv->cache.tags);
++}
++
++static int ps3vram_read(struct ps3_system_bus_device *dev, loff_t from,
++ size_t len, size_t *retlen, u_char *buf)
++{
++ struct ps3vram_priv *priv = dev->core.driver_data;
++ unsigned int cached, count;
++
++ dev_dbg(&dev->core, "%s: from=0x%08x len=0x%zx\n", __func__,
++ (unsigned int)from, len);
++
++ if (from >= priv->size)
++ return -EIO;
++
++ if (len > priv->size - from)
++ len = priv->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(dev, from);
++ cached = CACHE_OFFSET + entry * priv->cache.page_size + offset;
++
++ dev_dbg(&dev->core, "%s: from=%08x cached=%08x offset=%08x "
++ "avail=%08x count=%08x\n", __func__,
++ (unsigned int)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 ps3_system_bus_device *dev, loff_t to,
++ size_t len, size_t *retlen, const u_char *buf)
++{
++ struct ps3vram_priv *priv = dev->core.driver_data;
++ unsigned int cached, count;
++
++ if (to >= priv->size)
++ return -EIO;
++
++ if (len > priv->size - to)
++ len = priv->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(dev, to);
++ cached = CACHE_OFFSET + entry * priv->cache.page_size + offset;
++
++ dev_dbg(&dev->core, "%s: to=%08x cached=%08x offset=%08x "
++ "avail=%08x count=%08x\n", __func__, (unsigned int)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 ps3vram_proc_show(struct seq_file *m, void *v)
++{
++ struct ps3vram_priv *priv = m->private;
++
++ seq_printf(m, "hit:%u\nmiss:%u\n", priv->cache.hit, priv->cache.miss);
++ return 0;
++}
++
++static int ps3vram_proc_open(struct inode *inode, struct file *file)
++{
++ return single_open(file, ps3vram_proc_show, PDE(inode)->data);
++}
++
++static const struct file_operations ps3vram_proc_fops = {
++ .owner = THIS_MODULE,
++ .open = ps3vram_proc_open,
++ .read = seq_read,
++ .llseek = seq_lseek,
++ .release = single_release,
++};
++
++static void __devinit ps3vram_proc_init(struct ps3_system_bus_device *dev)
++{
++ struct ps3vram_priv *priv = dev->core.driver_data;
++ struct proc_dir_entry *pde;
++
++ pde = proc_create(DEVICE_NAME, 0444, NULL, &ps3vram_proc_fops);
++ if (!pde) {
++ dev_warn(&dev->core, "failed to create /proc entry\n");
++ return;
++ }
++
++ pde->owner = THIS_MODULE;
++ pde->data = priv;
++}
++
++static int ps3vram_make_request(struct request_queue *q, struct bio *bio)
++{
++ struct ps3_system_bus_device *dev = q->queuedata;
++ int write = bio_data_dir(bio) == WRITE;
++ const char *op = write ? "write" : "read";
++ loff_t offset = bio->bi_sector << 9;
++ int error = 0;
++ struct bio_vec *bvec;
++ unsigned int i;
++
++ dev_dbg(&dev->core, "%s\n", __func__);
++
++ bio_for_each_segment(bvec, bio, i) {
++ /* PS3 is ppc64, so we don't handle highmem */
++ char *ptr = page_address(bvec->bv_page) + bvec->bv_offset;
++ size_t len = bvec->bv_len, retlen;
++
++ dev_dbg(&dev->core, " %s %zu bytes at offset %llu\n", op,
++ len, offset);
++ if (write)
++ error = ps3vram_write(dev, offset, len, &retlen, ptr);
++ else
++ error = ps3vram_read(dev, offset, len, &retlen, ptr);
++
++ if (error) {
++ dev_err(&dev->core, "%s failed\n", op);
++ goto out;
++ }
++
++ if (retlen != len) {
++ dev_err(&dev->core, "Short %s\n", op);
++ goto out;
++ }
++
++ offset += len;
++ }
++
++ dev_dbg(&dev->core, "%s completed\n", op);
++
++out:
++ bio_endio(bio, error);
++ return 0;
++}
++
++static int __devinit ps3vram_probe(struct ps3_system_bus_device *dev)
++{
++ struct ps3vram_priv *priv;
++ int error, status;
++ struct request_queue *queue;
++ struct gendisk *gendisk;
++ u64 ddr_lpar, ctrl_lpar, info_lpar, reports_lpar, ddr_size,
++ reports_size;
++ char *rest;
++
++ priv = kzalloc(sizeof(*priv), GFP_KERNEL);
++ if (!priv) {
++ error = -ENOMEM;
++ goto fail;
++ }
++
++ mutex_init(&priv->lock);
++ dev->core.driver_data = priv;
++
++ priv = dev->core.driver_data;
++
++ /* Allocate XDR buffer (1MiB aligned) */
++ priv->xdr_buf = (void *)__get_free_pages(GFP_KERNEL,
++ get_order(XDR_BUF_SIZE));
++ if (priv->xdr_buf == NULL) {
++ dev_err(&dev->core, "Could not allocate XDR buffer\n");
++ error = -ENOMEM;
++ goto fail_free_priv;
++ }
++
++ /* Put FIFO at begginning of XDR buffer */
++ priv->fifo_base = (u32 *) (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)) {
++ dev_err(&dev->core, "ps3_open_hv_device failed\n");
++ error = -EAGAIN;
++ goto out_close_gpu;
++ }
++
++ /* Request memory */
++ status = -1;
++ ddr_size = ALIGN(memparse(size, &rest), 1024*1024);
++ if (!ddr_size) {
++ dev_err(&dev->core, "Specified size is too small\n");
++ error = -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)
++ break;
++ ddr_size -= 1024*1024;
++ }
++ if (status) {
++ dev_err(&dev->core, "lv1_gpu_memory_allocate failed %d\n",
++ status);
++ error = -ENOMEM;
++ goto out_free_xdr_buf;
++ }
++
++ /* Request context */
++ status = lv1_gpu_context_allocate(priv->memory_handle, 0,
++ &priv->context_handle, &ctrl_lpar,
++ &info_lpar, &reports_lpar,
++ &reports_size);
++ if (status) {
++ dev_err(&dev->core, "lv1_gpu_context_allocate failed %d\n",
++ status);
++ error = -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) {
++ dev_err(&dev->core, "lv1_gpu_context_iomap failed %d\n",
++ status);
++ error = -ENOMEM;
++ goto out_free_context;
++ }
++
++ priv->ddr_base = ioremap_flags(ddr_lpar, ddr_size, _PAGE_NO_CACHE);
++
++ if (!priv->ddr_base) {
++ dev_err(&dev->core, "ioremap DDR failed\n");
++ error = -ENOMEM;
++ goto out_free_context;
++ }
++
++ priv->ctrl = ioremap(ctrl_lpar, 64 * 1024);
++ if (!priv->ctrl) {
++ dev_err(&dev->core, "ioremap CTRL failed\n");
++ error = -ENOMEM;
++ goto out_unmap_vram;
++ }
++
++ priv->reports = ioremap(reports_lpar, reports_size);
++ if (!priv->reports) {
++ dev_err(&dev->core, "ioremap REPORTS failed\n");
++ error = -ENOMEM;
++ goto out_unmap_ctrl;
++ }
++
++ mutex_lock(&ps3_gpu_mutex);
++ ps3vram_init_ring(dev);
++ mutex_unlock(&ps3_gpu_mutex);
++
++ priv->size = ddr_size;
++
++ ps3vram_bind(dev);
++
++ mutex_lock(&ps3_gpu_mutex);
++ error = ps3vram_wait_ring(dev, 100);
++ mutex_unlock(&ps3_gpu_mutex);
++ if (error < 0) {
++ dev_err(&dev->core, "Failed to initialize channels\n");
++ error = -ETIMEDOUT;
++ goto out_unmap_reports;
++ }
++
++ ps3vram_cache_init(dev);
++ ps3vram_proc_init(dev);
++
++ queue = blk_alloc_queue(GFP_KERNEL);
++ if (!queue) {
++ dev_err(&dev->core, "blk_alloc_queue failed\n");
++ error = -ENOMEM;
++ goto out_cache_cleanup;
++ }
++
++ priv->queue = queue;
++ queue->queuedata = dev;
++ blk_queue_make_request(queue, ps3vram_make_request);
++ blk_queue_max_phys_segments(queue, MAX_PHYS_SEGMENTS);
++ blk_queue_max_hw_segments(queue, MAX_HW_SEGMENTS);
++ blk_queue_max_segment_size(queue, MAX_SEGMENT_SIZE);
++ blk_queue_max_sectors(queue, SAFE_MAX_SECTORS);
++
++ gendisk = alloc_disk(1);
++ if (!gendisk) {
++ dev_err(&dev->core, "alloc_disk failed\n");
++ error = -ENOMEM;
++ goto fail_cleanup_queue;
++ }
++
++ priv->gendisk = gendisk;
++ gendisk->major = ps3vram_major;
++ gendisk->first_minor = 0;
++ gendisk->fops = &ps3vram_fops;
++ gendisk->queue = queue;
++ gendisk->private_data = dev;
++ gendisk->driverfs_dev = &dev->core;
++ strlcpy(gendisk->disk_name, DEVICE_NAME, sizeof(gendisk->disk_name));
++ set_capacity(gendisk, priv->size >> 9);
++
++ dev_info(&dev->core, "%s: Using %lu MiB of GPU memory\n",
++ gendisk->disk_name, get_capacity(gendisk) >> 11);
++
++ add_disk(gendisk);
++ return 0;
++
++fail_cleanup_queue:
++ blk_cleanup_queue(queue);
++out_cache_cleanup:
++ remove_proc_entry(DEVICE_NAME, NULL);
++ ps3vram_cache_cleanup(dev);
++out_unmap_reports:
++ iounmap(priv->reports);
++out_unmap_ctrl:
++ iounmap(priv->ctrl);
++out_unmap_vram:
++ iounmap(priv->ddr_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));
++fail_free_priv:
++ kfree(priv);
++ dev->core.driver_data = NULL;
++fail:
++ return error;
++}
++
++static int ps3vram_remove(struct ps3_system_bus_device *dev)
++{
++ struct ps3vram_priv *priv = dev->core.driver_data;
++
++ del_gendisk(priv->gendisk);
++ put_disk(priv->gendisk);
++ blk_cleanup_queue(priv->queue);
++ remove_proc_entry(DEVICE_NAME, NULL);
++ ps3vram_cache_cleanup(dev);
++ iounmap(priv->reports);
++ iounmap(priv->ctrl);
++ iounmap(priv->ddr_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);
++ dev->core.driver_data = NULL;
++ return 0;
++}
++
++static struct ps3_system_bus_driver ps3vram = {
++ .match_id = PS3_MATCH_ID_GPU,
++ .match_sub_id = PS3_MATCH_SUB_ID_GPU_RAMDISK,
++ .core.name = DEVICE_NAME,
++ .core.owner = THIS_MODULE,
++ .probe = ps3vram_probe,
++ .remove = ps3vram_remove,
++ .shutdown = ps3vram_remove,
++};
++
++
++static int __init ps3vram_init(void)
++{
++ int error;
++
++ if (!firmware_has_feature(FW_FEATURE_PS3_LV1))
++ return -ENODEV;
++
++ error = register_blkdev(0, DEVICE_NAME);
++ if (error <= 0) {
++ pr_err("%s: register_blkdev failed %d\n", DEVICE_NAME, error);
++ return error;
++ }
++ ps3vram_major = error;
++
++ pr_info("%s: registered block device major %d\n", DEVICE_NAME,
++ ps3vram_major);
++
++ error = ps3_system_bus_driver_register(&ps3vram);
++ if (error)
++ unregister_blkdev(ps3vram_major, DEVICE_NAME);
++
++ return error;
++}
++
++static void __exit ps3vram_exit(void)
++{
++ ps3_system_bus_driver_unregister(&ps3vram);
++ unregister_blkdev(ps3vram_major, DEVICE_NAME);
++}
++
++module_init(ps3vram_init);
++module_exit(ps3vram_exit);
++
++MODULE_LICENSE("GPL");
++MODULE_DESCRIPTION("PS3 Video RAM Storage Driver");
++MODULE_AUTHOR("Sony Corporation");
++MODULE_ALIAS(PS3_MODULE_ALIAS_GPU_RAMDISK);
+diff --git a/drivers/mtd/devices/Kconfig b/drivers/mtd/devices/Kconfig
+index bc33200..6fde0a2 100644
+--- a/drivers/mtd/devices/Kconfig
++++ b/drivers/mtd/devices/Kconfig
+@@ -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
+diff --git a/drivers/mtd/devices/Makefile b/drivers/mtd/devices/Makefile
+index e51521d..0993d5c 100644
+--- a/drivers/mtd/devices/Makefile
++++ b/drivers/mtd/devices/Makefile
+@@ -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
+diff --git a/drivers/mtd/devices/ps3vram.c b/drivers/mtd/devices/ps3vram.c
+deleted file mode 100644
+index d21e9be..0000000
+--- a/drivers/mtd/devices/ps3vram.c
++++ /dev/null
+@@ -1,768 +0,0 @@
+-/**
+- * 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/mm.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 1MiB 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
+-
+-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 {
+- u64 memory_handle;
+- u64 context_handle;
+- u32 *ctrl;
+- u32 *reports;
+- u8 __iomem *ddr_base;
+- u8 *xdr_buf;
+-
+- u32 *fifo_base;
+- u32 *fifo_ptr;
+-
+- struct device *dev;
+- 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 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 u32 *ps3vram_get_notifier(u32 *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;
+- u32 *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, unsigned int timeout_ms)
+-{
+- struct ps3vram_priv *priv = mtd->priv;
+- u32 *notify = ps3vram_get_notifier(priv->reports, NOTIFIER);
+- unsigned long timeout = jiffies + msecs_to_jiffies(timeout_ms);
+-
+- do {
+- if (!notify[3])
+- return 0;
+- msleep(1);
+- } while (time_before(jiffies, timeout));
+-
+- return -ETIMEDOUT;
+-}
+-
+-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, unsigned int timeout_ms)
+-{
+- struct ps3vram_priv *priv = mtd->priv;
+- unsigned long timeout = jiffies + msecs_to_jiffies(timeout_ms);
+-
+- do {
+- if (priv->ctrl[CTRL_PUT] == priv->ctrl[CTRL_GET])
+- return 0;
+- msleep(1);
+- } while (time_before(jiffies, timeout));
+-
+- dev_dbg(priv->dev, "%s:%d: FIFO timeout (%08x/%08x/%08x)\n", __func__,
+- __LINE__, priv->ctrl[CTRL_PUT], priv->ctrl[CTRL_GET],
+- priv->ctrl[CTRL_TOP]);
+-
+- return -ETIMEDOUT;
+-}
+-
+-static void ps3vram_out_ring(struct ps3vram_priv *priv, u32 data)
+-{
+- *(priv->fifo_ptr)++ = data;
+-}
+-
+-static void ps3vram_begin_ring(struct ps3vram_priv *priv, u32 chan,
+- u32 tag, u32 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)
+- dev_err(priv->dev, "%s:%d: lv1_gpu_context_attribute failed\n",
+- __func__, __LINE__);
+-
+- 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(u32);
+-
+- /* 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)
+- dev_err(priv->dev, "%s:%d: lv1_gpu_context_attribute failed\n",
+- __func__, __LINE__);
+-
+- if ((priv->fifo_ptr - priv->fifo_base) * sizeof(u32) >
+- FIFO_SIZE - 1024) {
+- dev_dbg(priv->dev, "%s:%d: fifo full, rewinding\n", __func__,
+- __LINE__);
+- 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) {
+- dev_dbg(priv->dev, "%s:%d: notifier timeout\n", __func__,
+- __LINE__);
+- 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) {
+- dev_dbg(priv->dev, "%s:%d: notifier timeout\n", __func__,
+- __LINE__);
+- 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) {
+- dev_dbg(priv->dev, "%s:%d: flushing %d : 0x%08x\n", __func__,
+- __LINE__, 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) {
+- dev_dbg(priv->dev, "%s:%d: failed to upload from "
+- "0x%x to 0x%x size 0x%x\n", __func__, __LINE__,
+- 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;
+-
+- dev_dbg(priv->dev, "%s:%d: fetching %d : 0x%08x\n", __func__, __LINE__,
+- entry, address);
+- if (ps3vram_download(mtd,
+- address,
+- CACHE_OFFSET + entry * cache->page_size,
+- DMA_PAGE_SIZE,
+- cache->page_size / DMA_PAGE_SIZE) < 0) {
+- dev_err(priv->dev, "%s:%d: failed to download from "
+- "0x%x to 0x%x size 0x%x\n", __func__, __LINE__, 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;
+-
+- dev_dbg(priv->dev, "%s:%d: FLUSH\n", __func__, __LINE__);
+- 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) {
+- dev_dbg(priv->dev, "%s:%d: found entry %d : 0x%08x\n",
+- __func__, __LINE__, i, cache->tags[i].address);
+- return i;
+- }
+- }
+-
+- /* choose a random entry */
+- i = (jiffies + (counter++)) % cache->page_count;
+- dev_dbg(priv->dev, "%s:%d: using entry %d\n", __func__, __LINE__, 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;
+-
+- 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) {
+- dev_err(priv->dev, "%s:%d: could not allocate cache tags\n",
+- __func__, __LINE__);
+- return -ENOMEM;
+- }
+-
+- dev_info(priv->dev, "created ram cache: %d entries, %d KiB each\n",
+- CACHE_PAGE_COUNT, CACHE_PAGE_SIZE / 1024);
+-
+- 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_io(priv->ddr_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;
+-
+- dev_dbg(priv->dev, "%s:%d: from=0x%08x len=0x%zx\n", __func__, __LINE__,
+- (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;
+-
+- dev_dbg(priv->dev, "%s:%d: from=%08x cached=%08x offset=%08x "
+- "avail=%08x count=%08x\n", __func__, __LINE__,
+- (unsigned int)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;
+-
+- dev_dbg(priv->dev, "%s:%d: to=%08x cached=%08x offset=%08x "
+- "avail=%08x count=%08x\n", __func__, __LINE__,
+- (unsigned int)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;
+- int status;
+- u64 ddr_lpar;
+- u64 ctrl_lpar;
+- u64 info_lpar;
+- u64 reports_lpar;
+- u64 ddr_size;
+- u64 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);
+- priv->dev = &dev->core;
+-
+- /* Allocate XDR buffer (1MiB aligned) */
+- priv->xdr_buf = (void *)__get_free_pages(GFP_KERNEL,
+- get_order(XDR_BUF_SIZE));
+- if (priv->xdr_buf == NULL) {
+- dev_dbg(&dev->core, "%s:%d: could not allocate XDR buffer\n",
+- __func__, __LINE__);
+- ret = -ENOMEM;
+- goto out_free_priv;
+- }
+-
+- /* Put FIFO at begginning of XDR buffer */
+- priv->fifo_base = (u32 *) (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)) {
+- dev_err(&dev->core, "%s:%d: ps3_open_hv_device failed\n",
+- __func__, __LINE__);
+- 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) {
+- dev_err(&dev->core, "%s:%d: specified size is too small\n",
+- __func__, __LINE__);
+- 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)
+- break;
+- ddr_size -= 1024*1024;
+- }
+- if (status || ddr_size <= 0) {
+- dev_err(&dev->core, "%s:%d: lv1_gpu_memory_allocate failed\n",
+- __func__, __LINE__);
+- ret = -ENOMEM;
+- goto out_free_xdr_buf;
+- }
+-
+- /* Request context */
+- status = lv1_gpu_context_allocate(priv->memory_handle,
+- 0,
+- &priv->context_handle,
+- &ctrl_lpar,
+- &info_lpar,
+- &reports_lpar,
+- &reports_size);
+- if (status) {
+- dev_err(&dev->core, "%s:%d: lv1_gpu_context_allocate failed\n",
+- __func__, __LINE__);
+- 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) {
+- dev_err(&dev->core, "%s:%d: lv1_gpu_context_iomap failed\n",
+- __func__, __LINE__);
+- ret = -ENOMEM;
+- goto out_free_context;
+- }
+-
+- priv->ddr_base = ioremap_flags(ddr_lpar, ddr_size, _PAGE_NO_CACHE);
+-
+- if (!priv->ddr_base) {
+- dev_err(&dev->core, "%s:%d: ioremap failed\n", __func__,
+- __LINE__);
+- ret = -ENOMEM;
+- goto out_free_context;
+- }
+-
+- priv->ctrl = ioremap(ctrl_lpar, 64 * 1024);
+- if (!priv->ctrl) {
+- dev_err(&dev->core, "%s:%d: ioremap failed\n", __func__,
+- __LINE__);
+- ret = -ENOMEM;
+- goto out_unmap_vram;
+- }
+-
+- priv->reports = ioremap(reports_lpar, reports_size);
+- if (!priv->reports) {
+- dev_err(&dev->core, "%s:%d: ioremap failed\n", __func__,
+- __LINE__);
+- 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) {
+- dev_err(&dev->core, "%s:%d: failed to initialize channels\n",
+- __func__, __LINE__);
+- ret = -ETIMEDOUT;
+- goto out_unmap_reports;
+- }
+-
+- ps3vram_cache_init(&ps3vram_mtd);
+-
+- if (add_mtd_device(&ps3vram_mtd)) {
+- dev_err(&dev->core, "%s:%d: add_mtd_device failed\n",
+- __func__, __LINE__);
+- ret = -EAGAIN;
+- goto out_cache_cleanup;
+- }
+-
+- dev_info(&dev->core, "reserved %u MiB of gpu memory\n",
+- (unsigned int)(ddr_size / 1024 / 1024));
+-
+- 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->ddr_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->ddr_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_GPU,
+- .match_sub_id = PS3_MATCH_SUB_ID_GPU_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");
+-MODULE_ALIAS(PS3_MODULE_ALIAS_GPU_RAMDISK);
+--
+1.6.0.4
+
projects / openwrt.git / commitdiff