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Diffstat (limited to 'include/linux/dma-mapping.h')
-rw-r--r--include/linux/dma-mapping.h69
1 files changed, 38 insertions, 31 deletions
diff --git a/include/linux/dma-mapping.h b/include/linux/dma-mapping.h
index f6ded992c183..75e60be91e5f 100644
--- a/include/linux/dma-mapping.h
+++ b/include/linux/dma-mapping.h
@@ -130,6 +130,7 @@ struct dma_map_ops {
enum dma_data_direction direction);
int (*dma_supported)(struct device *dev, u64 mask);
u64 (*get_required_mask)(struct device *dev);
+ size_t (*max_mapping_size)(struct device *dev);
};
#define DMA_MAPPING_ERROR (~(dma_addr_t)0)
@@ -153,7 +154,7 @@ static inline int is_device_dma_capable(struct device *dev)
return dev->dma_mask != NULL && *dev->dma_mask != DMA_MASK_NONE;
}
-#ifdef CONFIG_HAVE_GENERIC_DMA_COHERENT
+#ifdef CONFIG_DMA_DECLARE_COHERENT
/*
* These three functions are only for dma allocator.
* Don't use them in device drivers.
@@ -192,7 +193,7 @@ static inline int dma_mmap_from_global_coherent(struct vm_area_struct *vma,
{
return 0;
}
-#endif /* CONFIG_HAVE_GENERIC_DMA_COHERENT */
+#endif /* CONFIG_DMA_DECLARE_COHERENT */
static inline bool dma_is_direct(const struct dma_map_ops *ops)
{
@@ -208,6 +209,8 @@ dma_addr_t dma_direct_map_page(struct device *dev, struct page *page,
unsigned long attrs);
int dma_direct_map_sg(struct device *dev, struct scatterlist *sgl, int nents,
enum dma_data_direction dir, unsigned long attrs);
+dma_addr_t dma_direct_map_resource(struct device *dev, phys_addr_t paddr,
+ size_t size, enum dma_data_direction dir, unsigned long attrs);
#if defined(CONFIG_ARCH_HAS_SYNC_DMA_FOR_DEVICE) || \
defined(CONFIG_SWIOTLB)
@@ -257,6 +260,8 @@ static inline void dma_direct_sync_sg_for_cpu(struct device *dev,
}
#endif
+size_t dma_direct_max_mapping_size(struct device *dev);
+
#ifdef CONFIG_HAS_DMA
#include <asm/dma-mapping.h>
@@ -346,19 +351,20 @@ static inline dma_addr_t dma_map_resource(struct device *dev,
unsigned long attrs)
{
const struct dma_map_ops *ops = get_dma_ops(dev);
- dma_addr_t addr;
+ dma_addr_t addr = DMA_MAPPING_ERROR;
BUG_ON(!valid_dma_direction(dir));
/* Don't allow RAM to be mapped */
- BUG_ON(pfn_valid(PHYS_PFN(phys_addr)));
+ if (WARN_ON_ONCE(pfn_valid(PHYS_PFN(phys_addr))))
+ return DMA_MAPPING_ERROR;
- addr = phys_addr;
- if (ops && ops->map_resource)
+ if (dma_is_direct(ops))
+ addr = dma_direct_map_resource(dev, phys_addr, size, dir, attrs);
+ else if (ops->map_resource)
addr = ops->map_resource(dev, phys_addr, size, dir, attrs);
debug_dma_map_resource(dev, phys_addr, size, dir, addr);
-
return addr;
}
@@ -369,7 +375,7 @@ static inline void dma_unmap_resource(struct device *dev, dma_addr_t addr,
const struct dma_map_ops *ops = get_dma_ops(dev);
BUG_ON(!valid_dma_direction(dir));
- if (ops && ops->unmap_resource)
+ if (!dma_is_direct(ops) && ops->unmap_resource)
ops->unmap_resource(dev, addr, size, dir, attrs);
debug_dma_unmap_resource(dev, addr, size, dir);
}
@@ -460,6 +466,7 @@ int dma_supported(struct device *dev, u64 mask);
int dma_set_mask(struct device *dev, u64 mask);
int dma_set_coherent_mask(struct device *dev, u64 mask);
u64 dma_get_required_mask(struct device *dev);
+size_t dma_max_mapping_size(struct device *dev);
#else /* CONFIG_HAS_DMA */
static inline dma_addr_t dma_map_page_attrs(struct device *dev,
struct page *page, size_t offset, size_t size,
@@ -561,6 +568,10 @@ static inline u64 dma_get_required_mask(struct device *dev)
{
return 0;
}
+static inline size_t dma_max_mapping_size(struct device *dev)
+{
+ return 0;
+}
#endif /* CONFIG_HAS_DMA */
static inline dma_addr_t dma_map_single_attrs(struct device *dev, void *ptr,
@@ -668,15 +679,23 @@ static inline int dma_coerce_mask_and_coherent(struct device *dev, u64 mask)
return dma_set_mask_and_coherent(dev, mask);
}
-#ifndef arch_setup_dma_ops
+#ifdef CONFIG_ARCH_HAS_SETUP_DMA_OPS
+void arch_setup_dma_ops(struct device *dev, u64 dma_base, u64 size,
+ const struct iommu_ops *iommu, bool coherent);
+#else
static inline void arch_setup_dma_ops(struct device *dev, u64 dma_base,
- u64 size, const struct iommu_ops *iommu,
- bool coherent) { }
-#endif
+ u64 size, const struct iommu_ops *iommu, bool coherent)
+{
+}
+#endif /* CONFIG_ARCH_HAS_SETUP_DMA_OPS */
-#ifndef arch_teardown_dma_ops
-static inline void arch_teardown_dma_ops(struct device *dev) { }
-#endif
+#ifdef CONFIG_ARCH_HAS_TEARDOWN_DMA_OPS
+void arch_teardown_dma_ops(struct device *dev);
+#else
+static inline void arch_teardown_dma_ops(struct device *dev)
+{
+}
+#endif /* CONFIG_ARCH_HAS_TEARDOWN_DMA_OPS */
static inline unsigned int dma_get_max_seg_size(struct device *dev)
{
@@ -725,19 +744,14 @@ static inline int dma_get_cache_alignment(void)
return 1;
}
-/* flags for the coherent memory api */
-#define DMA_MEMORY_EXCLUSIVE 0x01
-
-#ifdef CONFIG_HAVE_GENERIC_DMA_COHERENT
+#ifdef CONFIG_DMA_DECLARE_COHERENT
int dma_declare_coherent_memory(struct device *dev, phys_addr_t phys_addr,
- dma_addr_t device_addr, size_t size, int flags);
+ dma_addr_t device_addr, size_t size);
void dma_release_declared_memory(struct device *dev);
-void *dma_mark_declared_memory_occupied(struct device *dev,
- dma_addr_t device_addr, size_t size);
#else
static inline int
dma_declare_coherent_memory(struct device *dev, phys_addr_t phys_addr,
- dma_addr_t device_addr, size_t size, int flags)
+ dma_addr_t device_addr, size_t size)
{
return -ENOSYS;
}
@@ -746,14 +760,7 @@ static inline void
dma_release_declared_memory(struct device *dev)
{
}
-
-static inline void *
-dma_mark_declared_memory_occupied(struct device *dev,
- dma_addr_t device_addr, size_t size)
-{
- return ERR_PTR(-EBUSY);
-}
-#endif /* CONFIG_HAVE_GENERIC_DMA_COHERENT */
+#endif /* CONFIG_DMA_DECLARE_COHERENT */
static inline void *dmam_alloc_coherent(struct device *dev, size_t size,
dma_addr_t *dma_handle, gfp_t gfp)