mtd/ps3vram: Use _PAGE_NO_CACHE in memory ioremap

Use _PAGE_NO_CACHE for gpu memory ioremap.  Also,
add __iomem attribute to gpu memory pointer and
change use of memset() to memset_io().

Signed-off-by: Geoff Levand <geoffrey.levand@am.sony.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

1 files changed, 8 insertions, 6 deletions

diff --git a/drivers/mtd/devices/ps3vram.c b/drivers/mtd/devices/ps3vram.c
index d5924142d909..d21e9beb7ed2 100644
--- a/drivers/mtd/devices/ps3vram.c
+++ b/drivers/mtd/devices/ps3vram.c
@@ -6,6 +6,7 @@
  */
 
 #include <linux/io.h>
+#include <linux/mm.h>
 #include <linux/init.h>
 #include <linux/kernel.h>
 #include <linux/list.h>
@@ -69,7 +70,7 @@ struct ps3vram_priv {
         u64 context_handle;
         u32 *ctrl;
         u32 *reports;
-        u8 *base;
+        u8 __iomem *ddr_base;
         u8 *xdr_buf;
 
         u32 *fifo_base;
@@ -425,7 +426,7 @@ static int ps3vram_erase(struct mtd_info *mtd, struct erase_info *instr)
         ps3vram_cache_flush(mtd);
 
         /* Set bytes to 0xFF */
-        memset(priv->base + instr->addr, 0xFF, instr->len);
+        memset_io(priv->ddr_base + instr->addr, 0xFF, instr->len);
 
         mutex_unlock(&priv->lock);
 
@@ -628,8 +629,9 @@ static int __devinit ps3vram_probe(struct ps3_system_bus_device *dev)
                 goto out_free_context;
         }
 
-        priv->base = ioremap(ddr_lpar, ddr_size);
-        if (!priv->base) {
+        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;
@@ -702,7 +704,7 @@ out_unmap_reports:
 out_unmap_ctrl:
         iounmap(priv->ctrl);
 out_unmap_vram:
-        iounmap(priv->base);
+        iounmap(priv->ddr_base);
 out_free_context:
         lv1_gpu_context_free(priv->context_handle);
 out_free_memory:
@@ -728,7 +730,7 @@ static int ps3vram_shutdown(struct ps3_system_bus_device *dev)
         ps3vram_cache_cleanup(&ps3vram_mtd);
         iounmap(priv->reports);
         iounmap(priv->ctrl);
-        iounmap(priv->base);
+        iounmap(priv->ddr_base);
         lv1_gpu_context_free(priv->context_handle);
         lv1_gpu_memory_free(priv->memory_handle);
         ps3_close_hv_device(dev);