Merge branch 'wip-2.6.34' into old-private-masterarchived-private-master

1 files changed, 60 insertions, 173 deletions

diff --git a/arch/sh/include/asm/dma-mapping.h b/arch/sh/include/asm/dma-mapping.h
index 69d56dd4c968..bea3337a426a 100644
--- a/arch/sh/include/asm/dma-mapping.h
+++ b/arch/sh/include/asm/dma-mapping.h
@@ -1,219 +1,106 @@
 #ifndef __ASM_SH_DMA_MAPPING_H
 #define __ASM_SH_DMA_MAPPING_H
 
-#include <linux/mm.h>
-#include <linux/scatterlist.h>
-#include <linux/dma-debug.h>
-#include <asm/cacheflush.h>
-#include <asm/io.h>
+extern struct dma_map_ops *dma_ops;
+extern void no_iommu_init(void);
+
+static inline struct dma_map_ops *get_dma_ops(struct device *dev)
+{
+        return dma_ops;
+}
+
 #include <asm-generic/dma-coherent.h>
+#include <asm-generic/dma-mapping-common.h>
+
+static inline int dma_supported(struct device *dev, u64 mask)
+{
+        struct dma_map_ops *ops = get_dma_ops(dev);
 
-extern struct bus_type pci_bus_type;
+        if (ops->dma_supported)
+                return ops->dma_supported(dev, mask);
 
-#define dma_supported(dev, mask)        (1)
+        return 1;
+}
 
 static inline int dma_set_mask(struct device *dev, u64 mask)
 {
+        struct dma_map_ops *ops = get_dma_ops(dev);
+
         if (!dev->dma_mask || !dma_supported(dev, mask))
                 return -EIO;
+        if (ops->set_dma_mask)
+                return ops->set_dma_mask(dev, mask);
 
         *dev->dma_mask = mask;
 
         return 0;
 }
 
-void *dma_alloc_coherent(struct device *dev, size_t size,
-                         dma_addr_t *dma_handle, gfp_t flag);
-
-void dma_free_coherent(struct device *dev, size_t size,
-                       void *vaddr, dma_addr_t dma_handle);
-
 void dma_cache_sync(struct device *dev, void *vaddr, size_t size,
                     enum dma_data_direction dir);
 
 #define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f)
 #define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h)
-#define dma_is_consistent(d, h) (1)
-
-static inline dma_addr_t dma_map_single(struct device *dev,
-                                        void *ptr, size_t size,
-                                        enum dma_data_direction dir)
-{
-        dma_addr_t addr = virt_to_phys(ptr);
-
-#if defined(CONFIG_PCI) && !defined(CONFIG_SH_PCIDMA_NONCOHERENT)
-        if (dev->bus == &pci_bus_type)
-                return addr;
-#endif
-        dma_cache_sync(dev, ptr, size, dir);
 
-        debug_dma_map_page(dev, virt_to_page(ptr),
-                           (unsigned long)ptr & ~PAGE_MASK, size,
-                           dir, addr, true);
-
-        return addr;
-}
-
-static inline void dma_unmap_single(struct device *dev, dma_addr_t addr,
-                                    size_t size, enum dma_data_direction dir)
-{
-        debug_dma_unmap_page(dev, addr, size, dir, true);
-}
-
-static inline int dma_map_sg(struct device *dev, struct scatterlist *sg,
-                             int nents, enum dma_data_direction dir)
-{
-        int i;
-
-        for (i = 0; i < nents; i++) {
-#if !defined(CONFIG_PCI) || defined(CONFIG_SH_PCIDMA_NONCOHERENT)
-                dma_cache_sync(dev, sg_virt(&sg[i]), sg[i].length, dir);
-#endif
-                sg[i].dma_address = sg_phys(&sg[i]);
-                sg[i].dma_length = sg[i].length;
-        }
-
-        debug_dma_map_sg(dev, sg, nents, i, dir);
-
-        return nents;
-}
-
-static inline void dma_unmap_sg(struct device *dev, struct scatterlist *sg,
-                                int nents, enum dma_data_direction dir)
-{
-        debug_dma_unmap_sg(dev, sg, nents, dir);
-}
-
-static inline dma_addr_t dma_map_page(struct device *dev, struct page *page,
-                                      unsigned long offset, size_t size,
-                                      enum dma_data_direction dir)
-{
-        return dma_map_single(dev, page_address(page) + offset, size, dir);
-}
-
-static inline void dma_unmap_page(struct device *dev, dma_addr_t dma_address,
-                                  size_t size, enum dma_data_direction dir)
-{
-        dma_unmap_single(dev, dma_address, size, dir);
-}
-
-static inline void __dma_sync_single(struct device *dev, dma_addr_t dma_handle,
-                                   size_t size, enum dma_data_direction dir)
-{
-#if defined(CONFIG_PCI) && !defined(CONFIG_SH_PCIDMA_NONCOHERENT)
-        if (dev->bus == &pci_bus_type)
-                return;
+#ifdef CONFIG_DMA_COHERENT
+#define dma_is_consistent(d, h) (1)
+#else
+#define dma_is_consistent(d, h) (0)
 #endif
-        dma_cache_sync(dev, phys_to_virt(dma_handle), size, dir);
-}
 
-static inline void dma_sync_single_range(struct device *dev,
-                                         dma_addr_t dma_handle,
-                                         unsigned long offset, size_t size,
-                                         enum dma_data_direction dir)
+static inline int dma_get_cache_alignment(void)
 {
-#if defined(CONFIG_PCI) && !defined(CONFIG_SH_PCIDMA_NONCOHERENT)
-        if (dev->bus == &pci_bus_type)
-                return;
-#endif
-        dma_cache_sync(dev, phys_to_virt(dma_handle) + offset, size, dir);
+        /*
+         * Each processor family will define its own L1_CACHE_SHIFT,
+         * L1_CACHE_BYTES wraps to this, so this is always safe.
+         */
+        return L1_CACHE_BYTES;
 }
 
-static inline void __dma_sync_sg(struct device *dev, struct scatterlist *sg,
-                               int nelems, enum dma_data_direction dir)
+static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
 {
-        int i;
+        struct dma_map_ops *ops = get_dma_ops(dev);
 
-        for (i = 0; i < nelems; i++) {
-#if !defined(CONFIG_PCI) || defined(CONFIG_SH_PCIDMA_NONCOHERENT)
-                dma_cache_sync(dev, sg_virt(&sg[i]), sg[i].length, dir);
-#endif
-                sg[i].dma_address = sg_phys(&sg[i]);
-                sg[i].dma_length = sg[i].length;
-        }
-}
+        if (ops->mapping_error)
+                return ops->mapping_error(dev, dma_addr);
 
-static inline void dma_sync_single_for_cpu(struct device *dev,
-                                           dma_addr_t dma_handle, size_t size,
-                                           enum dma_data_direction dir)
-{
-        __dma_sync_single(dev, dma_handle, size, dir);
-        debug_dma_sync_single_for_cpu(dev, dma_handle, size, dir);
-}
-
-static inline void dma_sync_single_for_device(struct device *dev,
-                                              dma_addr_t dma_handle,
-                                              size_t size,
-                                              enum dma_data_direction dir)
-{
-        __dma_sync_single(dev, dma_handle, size, dir);
-        debug_dma_sync_single_for_device(dev, dma_handle, size, dir);
+        return dma_addr == 0;
 }
 
-static inline void dma_sync_single_range_for_cpu(struct device *dev,
-                                                 dma_addr_t dma_handle,
-                                                 unsigned long offset,
-                                                 size_t size,
-                                                 enum dma_data_direction direction)
+static inline void *dma_alloc_coherent(struct device *dev, size_t size,
+                                       dma_addr_t *dma_handle, gfp_t gfp)
 {
-        dma_sync_single_for_cpu(dev, dma_handle+offset, size, direction);
-        debug_dma_sync_single_range_for_cpu(dev, dma_handle,
-                                            offset, size, direction);
-}
+        struct dma_map_ops *ops = get_dma_ops(dev);
+        void *memory;
 
-static inline void dma_sync_single_range_for_device(struct device *dev,
-                                                    dma_addr_t dma_handle,
-                                                    unsigned long offset,
-                                                    size_t size,
-                                                    enum dma_data_direction direction)
-{
-        dma_sync_single_for_device(dev, dma_handle+offset, size, direction);
-        debug_dma_sync_single_range_for_device(dev, dma_handle,
-                                               offset, size, direction);
-}
+        if (dma_alloc_from_coherent(dev, size, dma_handle, &memory))
+                return memory;
+        if (!ops->alloc_coherent)
+                return NULL;
 
+        memory = ops->alloc_coherent(dev, size, dma_handle, gfp);
+        debug_dma_alloc_coherent(dev, size, *dma_handle, memory);
 
-static inline void dma_sync_sg_for_cpu(struct device *dev,
-                                       struct scatterlist *sg, int nelems,
-                                       enum dma_data_direction dir)
-{
-        __dma_sync_sg(dev, sg, nelems, dir);
-        debug_dma_sync_sg_for_cpu(dev, sg, nelems, dir);
+        return memory;
 }
 
-static inline void dma_sync_sg_for_device(struct device *dev,
-                                          struct scatterlist *sg, int nelems,
-                                          enum dma_data_direction dir)
+static inline void dma_free_coherent(struct device *dev, size_t size,
+                                     void *vaddr, dma_addr_t dma_handle)
 {
-        __dma_sync_sg(dev, sg, nelems, dir);
-        debug_dma_sync_sg_for_device(dev, sg, nelems, dir);
-}
+        struct dma_map_ops *ops = get_dma_ops(dev);
 
-static inline int dma_get_cache_alignment(void)
-{
-        /*
-         * Each processor family will define its own L1_CACHE_SHIFT,
-         * L1_CACHE_BYTES wraps to this, so this is always safe.
-         */
-        return L1_CACHE_BYTES;
-}
+        if (dma_release_from_coherent(dev, get_order(size), vaddr))
+                return;
 
-static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
-{
-        return dma_addr == 0;
+        debug_dma_free_coherent(dev, size, vaddr, dma_handle);
+        if (ops->free_coherent)
+                ops->free_coherent(dev, size, vaddr, dma_handle);
 }
 
-#define ARCH_HAS_DMA_DECLARE_COHERENT_MEMORY
-
-extern int
-dma_declare_coherent_memory(struct device *dev, dma_addr_t bus_addr,
-                            dma_addr_t device_addr, size_t size, int flags);
-
-extern void
-dma_release_declared_memory(struct device *dev);
-
-extern void *
-dma_mark_declared_memory_occupied(struct device *dev,
-                                  dma_addr_t device_addr, size_t size);
+/* arch/sh/mm/consistent.c */
+extern void *dma_generic_alloc_coherent(struct device *dev, size_t size,
+                                        dma_addr_t *dma_addr, gfp_t flag);
+extern void dma_generic_free_coherent(struct device *dev, size_t size,
+                                      void *vaddr, dma_addr_t dma_handle);
 
 #endif /* __ASM_SH_DMA_MAPPING_H */