- patches.suse/slab-handle-memoryless-nodes-v2a.patch: Refresh.

[linux-flexiantxendom0-3.2.10.git] / arch / blackfin / kernel / dma-mapping.c

diff --git a/arch/blackfin/kernel/dma-mapping.c b/arch/blackfin/kernel/dma-mapping.c
index e74e74d..e937f32 100644 (file)
--- a/arch/blackfin/kernel/dma-mapping.c
+++ b/arch/blackfin/kernel/dma-mapping.c
@@ -7,30 +7,25 @@
  */
 
 #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);
@@ -58,10 +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;
                        }
@@ -84,14 +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;
 
@@ -115,21 +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,
@@ -137,30 +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);