1 files changed, 28 insertions, 67 deletions

diff --git a/arch/blackfin/kernel/dma-mapping.c b/arch/blackfin/kernel/dma-mapping.c
index 2f62a9f4058a..e937f323d82c 100644
--- a/arch/blackfin/kernel/dma-mapping.c
+++ b/arch/blackfin/kernel/dma-mapping.c
@@ -1,57 +1,31 @@
 /*
- * File:         arch/blackfin/kernel/dma-mapping.c
- * Based on:
- * Author:
+ * Dynamic DMA mapping support
  *
- * Created:
- * Description:  Dynamic DMA mapping support.
+ * Copyright 2005-2009 Analog Devices Inc.
  *
- * Modified:
- *               Copyright 2004-2006 Analog Devices Inc.
- *
- * Bugs:         Enter bugs at http://blackfin.uclinux.org/
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, see the file COPYING, or write
- * to the Free Software Foundation, Inc.,
- * 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ * Licensed under the GPL-2 or later
  */
 
 #include <linux/types.h>
-#include <linux/mm.h>
+#include <linux/gfp.h>
 #include <linux/string.h>
-#include <linux/bootmem.h>
 #include <linux/spinlock.h>
-#include <linux/device.h>
 #include <linux/dma-mapping.h>
-#include <linux/io.h>
 #include <linux/scatterlist.h>
-#include <asm/cacheflush.h>
-#include <asm/bfin-global.h>
 
 static spinlock_t dma_page_lock;
-static unsigned int *dma_page;
+static unsigned long *dma_page;
 static unsigned int dma_pages;
 static unsigned long dma_base;
 static unsigned long dma_size;
 static unsigned int dma_initialized;
 
-void dma_alloc_init(unsigned long start, unsigned long end)
+static void dma_alloc_init(unsigned long start, unsigned long end)
 {
         spin_lock_init(&dma_page_lock);
         dma_initialized = 0;
 
-        dma_page = (unsigned int *)__get_free_page(GFP_KERNEL);
+        dma_page = (unsigned long *)__get_free_page(GFP_KERNEL);
         memset(dma_page, 0, PAGE_SIZE);
         dma_base = PAGE_ALIGN(start);
         dma_size = PAGE_ALIGN(end) - PAGE_ALIGN(start);
@@ -79,10 +53,11 @@ static unsigned long __alloc_dma_pages(unsigned int pages)
         spin_lock_irqsave(&dma_page_lock, flags);
 
         for (i = 0; i < dma_pages;) {
-                if (dma_page[i++] == 0) {
+                if (test_bit(i++, dma_page) == 0) {
                         if (++count == pages) {
                                 while (count--)
-                                        dma_page[--i] = 1;
+                                        __set_bit(--i, dma_page);
+
                                 ret = dma_base + (i << PAGE_SHIFT);
                                 break;
                         }
@@ -105,14 +80,14 @@ static void __free_dma_pages(unsigned long addr, unsigned int pages)
         }
 
         spin_lock_irqsave(&dma_page_lock, flags);
-        for (i = page; i < page + pages; i++) {
-                dma_page[i] = 0;
-        }
+        for (i = page; i < page + pages; i++)
+                __clear_bit(i, dma_page);
+
         spin_unlock_irqrestore(&dma_page_lock, flags);
 }
 
 void *dma_alloc_coherent(struct device *dev, size_t size,
-                         dma_addr_t * dma_handle, gfp_t gfp)
+                         dma_addr_t *dma_handle, gfp_t gfp)
 {
         void *ret;
 
@@ -136,21 +111,14 @@ dma_free_coherent(struct device *dev, size_t size, void *vaddr,
 EXPORT_SYMBOL(dma_free_coherent);
 
 /*
- * Dummy functions defined for some existing drivers
+ * Streaming DMA mappings
  */
-
-dma_addr_t
-dma_map_single(struct device *dev, void *ptr, size_t size,
-               enum dma_data_direction direction)
+void __dma_sync(dma_addr_t addr, size_t size,
+                enum dma_data_direction dir)
 {
-        BUG_ON(direction == DMA_NONE);
-
-        invalidate_dcache_range((unsigned long)ptr,
-                        (unsigned long)ptr + size);
-
-        return (dma_addr_t) ptr;
+        _dma_sync(addr, size, dir);
 }
-EXPORT_SYMBOL(dma_map_single);
+EXPORT_SYMBOL(__dma_sync);
 
 int
 dma_map_sg(struct device *dev, struct scatterlist *sg, int nents,
@@ -158,30 +126,23 @@ dma_map_sg(struct device *dev, struct scatterlist *sg, int nents,
 {
         int i;
 
-        BUG_ON(direction == DMA_NONE);
-
         for (i = 0; i < nents; i++, sg++) {
                 sg->dma_address = (dma_addr_t) sg_virt(sg);
-
-                invalidate_dcache_range(sg_dma_address(sg),
-                                        sg_dma_address(sg) +
-                                        sg_dma_len(sg));
+                __dma_sync(sg_dma_address(sg), sg_dma_len(sg), direction);
         }
 
         return nents;
 }
 EXPORT_SYMBOL(dma_map_sg);
 
-void dma_unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size,
-                enum dma_data_direction direction)
+void dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg,
+                            int nelems, enum dma_data_direction direction)
 {
-        BUG_ON(direction == DMA_NONE);
-}
-EXPORT_SYMBOL(dma_unmap_single);
+        int i;
 
-void dma_unmap_sg(struct device *dev, struct scatterlist *sg,
-                int nhwentries, enum dma_data_direction direction)
-{
-        BUG_ON(direction == DMA_NONE);
+        for (i = 0; i < nelems; i++, sg++) {
+                sg->dma_address = (dma_addr_t) sg_virt(sg);
+                __dma_sync(sg_dma_address(sg), sg_dma_len(sg), direction);
+        }
 }
-EXPORT_SYMBOL(dma_unmap_sg);
+EXPORT_SYMBOL(dma_sync_sg_for_device);