ps3/block: Replace mtd/ps3vram by block/ps3vram
authorGeert Uytterhoeven <Geert.Uytterhoeven@sonycom.com>
Fri, 6 Mar 2009 02:54:09 +0000 (02:54 +0000)
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>
Fri, 13 Mar 2009 05:07:19 +0000 (16:07 +1100)
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
drivers/block/Makefile
drivers/block/ps3vram.c [new file with mode: 0644]
drivers/mtd/devices/Kconfig
drivers/mtd/devices/Makefile
drivers/mtd/devices/ps3vram.c [deleted file]

index 920cf7a454b1d26df440baf93409dad33c9b2394..740ef56a1550c75af26e8cf551655e03906aa08e 100644 (file)
@@ -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
index 204332b29578f7911ba4b73eb808ddfe21ff1246..87e120e0a79c2f458ccbbceb3e7932aed9d37d1c 100644 (file)
@@ -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 (file)
index 0000000..393ed67
--- /dev/null
@@ -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);
index bc33200535fc3857a474892eec8340dbfabfbc64..6fde0a2e3567d589fb4757a12eb49929b1c6c463 100644 (file)
@@ -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
index e51521df4e40278d08a098a3d6dcd7425f35cea8..0993d5cf3923f3a4895a6579aa18759bb76a3c72 100644 (file)
@@ -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 (file)
index d21e9be..0000000
+++ /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);