Merge branches 'core/iommu', 'x86/amd-iommu' and 'x86/iommu' into x86-v28-for-linus...

[mv-sheeva.git] / include / asm-x86 / dma-mapping.h

diff --git a/include/asm-x86/dma-mapping.h b/include/asm-x86/dma-mapping.h
index 5d200e78bd81e18b7e315f8f2d9660cd13c23a1d..219c33d6361cdfa640878431cd6e6523dc2a475a 100644 (file)
--- a/include/asm-x86/dma-mapping.h
+++ b/include/asm-x86/dma-mapping.h
@@ -9,12 +9,12 @@
 #include <linux/scatterlist.h>
 #include <asm/io.h>
 #include <asm/swiotlb.h>
+#include <asm-generic/dma-coherent.h>
 
 extern dma_addr_t bad_dma_address;
 extern int iommu_merge;
-extern struct device fallback_dev;
+extern struct device x86_dma_fallback_dev;
 extern int panic_on_overflow;
-extern int force_iommu;
 
 struct dma_mapping_ops {
        int             (*mapping_error)(struct device *dev,
@@ -25,9 +25,6 @@ struct dma_mapping_ops {
                                void *vaddr, dma_addr_t dma_handle);
        dma_addr_t      (*map_single)(struct device *hwdev, phys_addr_t ptr,
                                size_t size, int direction);
-       /* like map_single, but doesn't check the device mask */
-       dma_addr_t      (*map_simple)(struct device *hwdev, phys_addr_t ptr,
-                               size_t size, int direction);
        void            (*unmap_single)(struct device *dev, dma_addr_t addr,
                                size_t size, int direction);
        void            (*sync_single_for_cpu)(struct device *hwdev,
@@ -68,7 +65,7 @@ static inline struct dma_mapping_ops *get_dma_ops(struct device *dev)
                return dma_ops;
        else
                return dev->archdata.dma_ops;
-#endif
+#endif /* ASM_X86__DMA_MAPPING_H */
 }
 
 /* Make sure we keep the same behaviour */
@@ -87,17 +84,14 @@ static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
 
 #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)
-
-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);
-
+#define dma_is_consistent(d, h)        (1)
 
 extern int dma_supported(struct device *hwdev, u64 mask);
 extern int dma_set_mask(struct device *dev, u64 mask);
 
+extern void *dma_generic_alloc_coherent(struct device *dev, size_t size,
+                                       dma_addr_t *dma_addr, gfp_t flag);
+
 static inline dma_addr_t
 dma_map_single(struct device *hwdev, void *ptr, size_t size,
               int direction)
@@ -247,7 +241,68 @@ static inline int dma_get_cache_alignment(void)
        return boot_cpu_data.x86_clflush_size;
 }
 
-#define dma_is_consistent(d, h)        (1)
+static inline unsigned long dma_alloc_coherent_mask(struct device *dev,
+                                                   gfp_t gfp)
+{
+       unsigned long dma_mask = 0;
 
-#include <asm-generic/dma-coherent.h>
-#endif /* ASM_X86__DMA_MAPPING_H */
+       dma_mask = dev->coherent_dma_mask;
+       if (!dma_mask)
+               dma_mask = (gfp & GFP_DMA) ? DMA_24BIT_MASK : DMA_32BIT_MASK;
+
+       return dma_mask;
+}
+
+static inline gfp_t dma_alloc_coherent_gfp_flags(struct device *dev, gfp_t gfp)
+{
+#ifdef CONFIG_X86_64
+       unsigned long dma_mask = dma_alloc_coherent_mask(dev, gfp);
+
+       if (dma_mask <= DMA_32BIT_MASK && !(gfp & GFP_DMA))
+               gfp |= GFP_DMA32;
+#endif
+       return gfp;
+}
+
+static inline void *
+dma_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_handle,
+               gfp_t gfp)
+{
+       struct dma_mapping_ops *ops = get_dma_ops(dev);
+       void *memory;
+
+       gfp &= ~(__GFP_DMA | __GFP_HIGHMEM | __GFP_DMA32);
+
+       if (dma_alloc_from_coherent(dev, size, dma_handle, &memory))
+               return memory;
+
+       if (!dev) {
+               dev = &x86_dma_fallback_dev;
+               gfp |= GFP_DMA;
+       }
+
+       if (!is_device_dma_capable(dev))
+               return NULL;
+
+       if (!ops->alloc_coherent)
+               return NULL;
+
+       return ops->alloc_coherent(dev, size, dma_handle,
+                                  dma_alloc_coherent_gfp_flags(dev, gfp));
+}
+
+static inline void dma_free_coherent(struct device *dev, size_t size,
+                                    void *vaddr, dma_addr_t bus)
+{
+       struct dma_mapping_ops *ops = get_dma_ops(dev);
+
+       WARN_ON(irqs_disabled());       /* for portability */
+
+       if (dma_release_from_coherent(dev, get_order(size), vaddr))
+               return;
+
+       if (ops->free_coherent)
+               ops->free_coherent(dev, size, vaddr, bus);
+}
+
+#endif