m68k: merge the MMU and non-MMU versions of the arch dma code

The majority of the m68k architecture dma code is the same, so merge the
current separated files dma_no.c and dma_mm.c back into a single dma.c

The main alloc and free routines are a little different, so we keep a
single #ifdef based on CONFIG_MMU for them. All the other support functions
are now identical.

Signed-off-by: Greg Ungerer <gerg@uclinux.org>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>

diff --git a/arch/m68k/kernel/dma.c b/arch/m68k/kernel/dma.c
index 90e8cb726c8ca25bdfaa31178672ee8a99af6f4f..f6daf6e15d2e6e1f8f0c02bf02dde1666393260c 100644 (file)
--- a/arch/m68k/kernel/dma.c
+++ b/arch/m68k/kernel/dma.c
@@ -1,5 +1,164 @@
+/*
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License.  See the file COPYING in the main directory of this archive
+ * for more details.
+ */
+
+#undef DEBUG
+
+#include <linux/dma-mapping.h>
+#include <linux/device.h>
+#include <linux/kernel.h>
+#include <linux/scatterlist.h>
+#include <linux/slab.h>
+#include <linux/vmalloc.h>
+#include <linux/export.h>
+
+#include <asm/pgalloc.h>
+
 #ifdef CONFIG_MMU
-#include "dma_mm.c"
+
+void *dma_alloc_coherent(struct device *dev, size_t size,
+                        dma_addr_t *handle, gfp_t flag)
+{
+       struct page *page, **map;
+       pgprot_t pgprot;
+       void *addr;
+       int i, order;
+
+       pr_debug("dma_alloc_coherent: %d,%x\n", size, flag);
+
+       size = PAGE_ALIGN(size);
+       order = get_order(size);
+
+       page = alloc_pages(flag, order);
+       if (!page)
+               return NULL;
+
+       *handle = page_to_phys(page);
+       map = kmalloc(sizeof(struct page *) << order, flag & ~__GFP_DMA);
+       if (!map) {
+               __free_pages(page, order);
+               return NULL;
+       }
+       split_page(page, order);
+
+       order = 1 << order;
+       size >>= PAGE_SHIFT;
+       map[0] = page;
+       for (i = 1; i < size; i++)
+               map[i] = page + i;
+       for (; i < order; i++)
+               __free_page(page + i);
+       pgprot = __pgprot(_PAGE_PRESENT | _PAGE_ACCESSED | _PAGE_DIRTY);
+       if (CPU_IS_040_OR_060)
+               pgprot_val(pgprot) |= _PAGE_GLOBAL040 | _PAGE_NOCACHE_S;
+       else
+               pgprot_val(pgprot) |= _PAGE_NOCACHE030;
+       addr = vmap(map, size, VM_MAP, pgprot);
+       kfree(map);
+
+       return addr;
+}
+
+void dma_free_coherent(struct device *dev, size_t size,
+                      void *addr, dma_addr_t handle)
+{
+       pr_debug("dma_free_coherent: %p, %x\n", addr, handle);
+       vfree(addr);
+}
+
 #else
-#include "dma_no.c"
-#endif
+
+#include <asm/cacheflush.h>
+
+void *dma_alloc_coherent(struct device *dev, size_t size,
+                          dma_addr_t *dma_handle, gfp_t gfp)
+{
+       void *ret;
+       /* ignore region specifiers */
+       gfp &= ~(__GFP_DMA | __GFP_HIGHMEM);
+
+       if (dev == NULL || (*dev->dma_mask < 0xffffffff))
+               gfp |= GFP_DMA;
+       ret = (void *)__get_free_pages(gfp, get_order(size));
+
+       if (ret != NULL) {
+               memset(ret, 0, size);
+               *dma_handle = virt_to_phys(ret);
+       }
+       return ret;
+}
+
+void dma_free_coherent(struct device *dev, size_t size,
+                        void *vaddr, dma_addr_t dma_handle)
+{
+       free_pages((unsigned long)vaddr, get_order(size));
+}
+
+#endif /* CONFIG_MMU */
+
+EXPORT_SYMBOL(dma_alloc_coherent);
+EXPORT_SYMBOL(dma_free_coherent);
+
+void dma_sync_single_for_device(struct device *dev, dma_addr_t handle,
+                               size_t size, enum dma_data_direction dir)
+{
+       switch (dir) {
+       case DMA_TO_DEVICE:
+               cache_push(handle, size);
+               break;
+       case DMA_FROM_DEVICE:
+               cache_clear(handle, size);
+               break;
+       default:
+               if (printk_ratelimit())
+                       printk("dma_sync_single_for_device: unsupported dir %u\n", dir);
+               break;
+       }
+}
+EXPORT_SYMBOL(dma_sync_single_for_device);
+
+void dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg, int nents,
+                           enum dma_data_direction dir)
+{
+       int i;
+
+       for (i = 0; i < nents; sg++, i++)
+               dma_sync_single_for_device(dev, sg->dma_address, sg->length, dir);
+}
+EXPORT_SYMBOL(dma_sync_sg_for_device);
+
+dma_addr_t dma_map_single(struct device *dev, void *addr, size_t size,
+                         enum dma_data_direction dir)
+{
+       dma_addr_t handle = virt_to_bus(addr);
+
+       dma_sync_single_for_device(dev, handle, size, dir);
+       return handle;
+}
+EXPORT_SYMBOL(dma_map_single);
+
+dma_addr_t dma_map_page(struct device *dev, struct page *page,
+                       unsigned long offset, size_t size,
+                       enum dma_data_direction dir)
+{
+       dma_addr_t handle = page_to_phys(page) + offset;
+
+       dma_sync_single_for_device(dev, handle, size, dir);
+       return handle;
+}
+EXPORT_SYMBOL(dma_map_page);
+
+int dma_map_sg(struct device *dev, struct scatterlist *sg, int nents,
+              enum dma_data_direction dir)
+{
+       int i;
+
+       for (i = 0; i < nents; sg++, i++) {
+               sg->dma_address = sg_phys(sg);
+               dma_sync_single_for_device(dev, sg->dma_address, sg->length, dir);
+       }
+       return nents;
+}
+EXPORT_SYMBOL(dma_map_sg);

diff --git a/arch/m68k/kernel/dma_mm.c b/arch/m68k/kernel/dma_mm.c
deleted file mode 100644 (file)
index a3c471b..0000000
--- a/arch/m68k/kernel/dma_mm.c
+++ /dev/null
@@ -1,131 +0,0 @@
-/*
- * This file is subject to the terms and conditions of the GNU General Public
- * License.  See the file COPYING in the main directory of this archive
- * for more details.
- */
-
-#undef DEBUG
-
-#include <linux/dma-mapping.h>
-#include <linux/device.h>
-#include <linux/kernel.h>
-#include <linux/scatterlist.h>
-#include <linux/slab.h>
-#include <linux/vmalloc.h>
-#include <linux/export.h>
-
-#include <asm/pgalloc.h>
-
-void *dma_alloc_coherent(struct device *dev, size_t size,
-                        dma_addr_t *handle, gfp_t flag)
-{
-       struct page *page, **map;
-       pgprot_t pgprot;
-       void *addr;
-       int i, order;
-
-       pr_debug("dma_alloc_coherent: %d,%x\n", size, flag);
-
-       size = PAGE_ALIGN(size);
-       order = get_order(size);
-
-       page = alloc_pages(flag, order);
-       if (!page)
-               return NULL;
-
-       *handle = page_to_phys(page);
-       map = kmalloc(sizeof(struct page *) << order, flag & ~__GFP_DMA);
-       if (!map) {
-               __free_pages(page, order);
-               return NULL;
-       }
-       split_page(page, order);
-
-       order = 1 << order;
-       size >>= PAGE_SHIFT;
-       map[0] = page;
-       for (i = 1; i < size; i++)
-               map[i] = page + i;
-       for (; i < order; i++)
-               __free_page(page + i);
-       pgprot = __pgprot(_PAGE_PRESENT | _PAGE_ACCESSED | _PAGE_DIRTY);
-       if (CPU_IS_040_OR_060)
-               pgprot_val(pgprot) |= _PAGE_GLOBAL040 | _PAGE_NOCACHE_S;
-       else
-               pgprot_val(pgprot) |= _PAGE_NOCACHE030;
-       addr = vmap(map, size, VM_MAP, pgprot);
-       kfree(map);
-
-       return addr;
-}
-EXPORT_SYMBOL(dma_alloc_coherent);
-
-void dma_free_coherent(struct device *dev, size_t size,
-                      void *addr, dma_addr_t handle)
-{
-       pr_debug("dma_free_coherent: %p, %x\n", addr, handle);
-       vfree(addr);
-}
-EXPORT_SYMBOL(dma_free_coherent);
-
-void dma_sync_single_for_device(struct device *dev, dma_addr_t handle,
-                               size_t size, enum dma_data_direction dir)
-{
-       switch (dir) {
-       case DMA_TO_DEVICE:
-               cache_push(handle, size);
-               break;
-       case DMA_FROM_DEVICE:
-               cache_clear(handle, size);
-               break;
-       default:
-               if (printk_ratelimit())
-                       printk("dma_sync_single_for_device: unsupported dir %u\n", dir);
-               break;
-       }
-}
-EXPORT_SYMBOL(dma_sync_single_for_device);
-
-void dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg, int nents,
-                           enum dma_data_direction dir)
-{
-       int i;
-
-       for (i = 0; i < nents; sg++, i++)
-               dma_sync_single_for_device(dev, sg->dma_address, sg->length, dir);
-}
-EXPORT_SYMBOL(dma_sync_sg_for_device);
-
-dma_addr_t dma_map_single(struct device *dev, void *addr, size_t size,
-                         enum dma_data_direction dir)
-{
-       dma_addr_t handle = virt_to_bus(addr);
-
-       dma_sync_single_for_device(dev, handle, size, dir);
-       return handle;
-}
-EXPORT_SYMBOL(dma_map_single);
-
-dma_addr_t dma_map_page(struct device *dev, struct page *page,
-                       unsigned long offset, size_t size,
-                       enum dma_data_direction dir)
-{
-       dma_addr_t handle = page_to_phys(page) + offset;
-
-       dma_sync_single_for_device(dev, handle, size, dir);
-       return handle;
-}
-EXPORT_SYMBOL(dma_map_page);
-
-int dma_map_sg(struct device *dev, struct scatterlist *sg, int nents,
-              enum dma_data_direction dir)
-{
-       int i;
-
-       for (i = 0; i < nents; sg++, i++) {
-               sg->dma_address = sg_phys(sg);
-               dma_sync_single_for_device(dev, sg->dma_address, sg->length, dir);
-       }
-       return nents;
-}
-EXPORT_SYMBOL(dma_map_sg);

diff --git a/arch/m68k/kernel/dma_no.c b/arch/m68k/kernel/dma_no.c
deleted file mode 100644 (file)
index f1dc3fc..0000000
--- a/arch/m68k/kernel/dma_no.c
+++ /dev/null
@@ -1,75 +0,0 @@
-/*
- * Dynamic DMA mapping support.
- *
- * We never have any address translations to worry about, so this
- * is just alloc/free.
- */
-
-#include <linux/types.h>
-#include <linux/gfp.h>
-#include <linux/mm.h>
-#include <linux/device.h>
-#include <linux/dma-mapping.h>
-#include <linux/export.h>
-#include <asm/cacheflush.h>
-
-void *dma_alloc_coherent(struct device *dev, size_t size,
-                          dma_addr_t *dma_handle, gfp_t gfp)
-{
-       void *ret;
-       /* ignore region specifiers */
-       gfp &= ~(__GFP_DMA | __GFP_HIGHMEM);
-
-       if (dev == NULL || (*dev->dma_mask < 0xffffffff))
-               gfp |= GFP_DMA;
-       ret = (void *)__get_free_pages(gfp, get_order(size));
-
-       if (ret != NULL) {
-               memset(ret, 0, size);
-               *dma_handle = virt_to_phys(ret);
-       }
-       return ret;
-}
-
-void dma_free_coherent(struct device *dev, size_t size,
-                        void *vaddr, dma_addr_t dma_handle)
-{
-       free_pages((unsigned long)vaddr, get_order(size));
-}
-
-void dma_sync_single_for_device(struct device *dev, dma_addr_t handle,
-                               size_t size, enum dma_data_direction dir)
-{
-       switch (dir) {
-       case DMA_TO_DEVICE:
-               flush_dcache_range(handle, size);
-               break;
-       case DMA_FROM_DEVICE:
-               /* Should be clear already */
-               break;
-       default:
-               if (printk_ratelimit())
-                       printk("dma_sync_single_for_device: unsupported dir %u\n", dir);
-               break;
-       }
-}
-
-EXPORT_SYMBOL(dma_sync_single_for_device);
-dma_addr_t dma_map_single(struct device *dev, void *addr, size_t size,
-                         enum dma_data_direction dir)
-{
-       dma_addr_t handle = virt_to_phys(addr);
-       flush_dcache_range(handle, size);
-       return handle;
-}
-EXPORT_SYMBOL(dma_map_single);
-
-dma_addr_t dma_map_page(struct device *dev, struct page *page,
-                       unsigned long offset, size_t size,
-                       enum dma_data_direction dir)
-{
-       dma_addr_t handle = page_to_phys(page) + offset;
-       dma_sync_single_for_device(dev, handle, size, dir);
-       return handle;
-}
-EXPORT_SYMBOL(dma_map_page);