#define _ASM_X86_DMA_MAPPING_H
/*
- * IOMMU interface. See Documentation/DMA-mapping.txt and DMA-API.txt for
- * documentation.
+ * IOMMU interface. See Documentation/PCI/PCI-DMA-mapping.txt and
+ * Documentation/DMA-API.txt for documentation.
*/
+#include <linux/kmemcheck.h>
#include <linux/scatterlist.h>
+#include <linux/dma-debug.h>
#include <linux/dma-attrs.h>
#include <asm/io.h>
#include <asm/swiotlb.h>
#include <asm-generic/dma-coherent.h>
+#ifdef CONFIG_ISA
+# define ISA_DMA_BIT_MASK DMA_BIT_MASK(24)
+#else
+# define ISA_DMA_BIT_MASK DMA_BIT_MASK(32)
+#endif
+
extern dma_addr_t bad_dma_address;
extern int iommu_merge;
extern struct device x86_dma_fallback_dev;
extern int panic_on_overflow;
-struct dma_mapping_ops {
- int (*mapping_error)(struct device *dev,
- dma_addr_t dma_addr);
- void* (*alloc_coherent)(struct device *dev, size_t size,
- dma_addr_t *dma_handle, gfp_t gfp);
- void (*free_coherent)(struct device *dev, size_t size,
- void *vaddr, dma_addr_t dma_handle);
- void (*sync_single_for_cpu)(struct device *hwdev,
- dma_addr_t dma_handle, size_t size,
- int direction);
- void (*sync_single_for_device)(struct device *hwdev,
- dma_addr_t dma_handle, size_t size,
- int direction);
- void (*sync_single_range_for_cpu)(struct device *hwdev,
- dma_addr_t dma_handle, unsigned long offset,
- size_t size, int direction);
- void (*sync_single_range_for_device)(struct device *hwdev,
- dma_addr_t dma_handle, unsigned long offset,
- size_t size, int direction);
- void (*sync_sg_for_cpu)(struct device *hwdev,
- struct scatterlist *sg, int nelems,
- int direction);
- void (*sync_sg_for_device)(struct device *hwdev,
- struct scatterlist *sg, int nelems,
- int direction);
- int (*map_sg)(struct device *hwdev, struct scatterlist *sg,
- int nents, int direction);
- void (*unmap_sg)(struct device *hwdev,
- struct scatterlist *sg, int nents,
- int direction);
- dma_addr_t (*map_page)(struct device *dev, struct page *page,
- unsigned long offset, size_t size,
- enum dma_data_direction dir,
- struct dma_attrs *attrs);
- void (*unmap_page)(struct device *dev, dma_addr_t dma_handle,
- size_t size, enum dma_data_direction dir,
- struct dma_attrs *attrs);
- int (*dma_supported)(struct device *hwdev, u64 mask);
- int is_phys;
-};
-
-extern struct dma_mapping_ops *dma_ops;
-
-static inline struct dma_mapping_ops *get_dma_ops(struct device *dev)
+extern struct dma_map_ops *dma_ops;
+
+static inline struct dma_map_ops *get_dma_ops(struct device *dev)
{
#ifdef CONFIG_X86_32
return dma_ops;
#endif
}
+#include <asm-generic/dma-mapping-common.h>
+
/* Make sure we keep the same behaviour */
static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
{
- struct dma_mapping_ops *ops = get_dma_ops(dev);
+ struct dma_map_ops *ops = get_dma_ops(dev);
if (ops->mapping_error)
return ops->mapping_error(dev, dma_addr);
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)
-{
- struct dma_mapping_ops *ops = get_dma_ops(hwdev);
-
- BUG_ON(!valid_dma_direction(direction));
- return ops->map_page(hwdev, virt_to_page(ptr),
- (unsigned long)ptr & ~PAGE_MASK, size,
- direction, NULL);
-}
-
-static inline void
-dma_unmap_single(struct device *dev, dma_addr_t addr, size_t size,
- int direction)
-{
- struct dma_mapping_ops *ops = get_dma_ops(dev);
-
- BUG_ON(!valid_dma_direction(direction));
- if (ops->unmap_page)
- ops->unmap_page(dev, addr, size, direction, NULL);
-}
-
-static inline int
-dma_map_sg(struct device *hwdev, struct scatterlist *sg,
- int nents, int direction)
-{
- struct dma_mapping_ops *ops = get_dma_ops(hwdev);
-
- BUG_ON(!valid_dma_direction(direction));
- return ops->map_sg(hwdev, sg, nents, direction);
-}
-
-static inline void
-dma_unmap_sg(struct device *hwdev, struct scatterlist *sg, int nents,
- int direction)
+static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size)
{
- struct dma_mapping_ops *ops = get_dma_ops(hwdev);
+ if (!dev->dma_mask)
+ return 0;
- BUG_ON(!valid_dma_direction(direction));
- if (ops->unmap_sg)
- ops->unmap_sg(hwdev, sg, nents, direction);
+ return addr + size <= *dev->dma_mask;
}
-static inline void
-dma_sync_single_for_cpu(struct device *hwdev, dma_addr_t dma_handle,
- size_t size, int direction)
+static inline dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr)
{
- struct dma_mapping_ops *ops = get_dma_ops(hwdev);
-
- BUG_ON(!valid_dma_direction(direction));
- if (ops->sync_single_for_cpu)
- ops->sync_single_for_cpu(hwdev, dma_handle, size, direction);
- flush_write_buffers();
+ return paddr;
}
-static inline void
-dma_sync_single_for_device(struct device *hwdev, dma_addr_t dma_handle,
- size_t size, int direction)
+static inline phys_addr_t dma_to_phys(struct device *dev, dma_addr_t daddr)
{
- struct dma_mapping_ops *ops = get_dma_ops(hwdev);
-
- BUG_ON(!valid_dma_direction(direction));
- if (ops->sync_single_for_device)
- ops->sync_single_for_device(hwdev, dma_handle, size, direction);
- flush_write_buffers();
-}
-
-static inline void
-dma_sync_single_range_for_cpu(struct device *hwdev, dma_addr_t dma_handle,
- unsigned long offset, size_t size, int direction)
-{
- struct dma_mapping_ops *ops = get_dma_ops(hwdev);
-
- BUG_ON(!valid_dma_direction(direction));
- if (ops->sync_single_range_for_cpu)
- ops->sync_single_range_for_cpu(hwdev, dma_handle, offset,
- size, direction);
- flush_write_buffers();
-}
-
-static inline void
-dma_sync_single_range_for_device(struct device *hwdev, dma_addr_t dma_handle,
- unsigned long offset, size_t size,
- int direction)
-{
- struct dma_mapping_ops *ops = get_dma_ops(hwdev);
-
- BUG_ON(!valid_dma_direction(direction));
- if (ops->sync_single_range_for_device)
- ops->sync_single_range_for_device(hwdev, dma_handle,
- offset, size, direction);
- flush_write_buffers();
-}
-
-static inline void
-dma_sync_sg_for_cpu(struct device *hwdev, struct scatterlist *sg,
- int nelems, int direction)
-{
- struct dma_mapping_ops *ops = get_dma_ops(hwdev);
-
- BUG_ON(!valid_dma_direction(direction));
- if (ops->sync_sg_for_cpu)
- ops->sync_sg_for_cpu(hwdev, sg, nelems, direction);
- flush_write_buffers();
-}
-
-static inline void
-dma_sync_sg_for_device(struct device *hwdev, struct scatterlist *sg,
- int nelems, int direction)
-{
- struct dma_mapping_ops *ops = get_dma_ops(hwdev);
-
- BUG_ON(!valid_dma_direction(direction));
- if (ops->sync_sg_for_device)
- ops->sync_sg_for_device(hwdev, sg, nelems, direction);
-
- flush_write_buffers();
-}
-
-static inline dma_addr_t dma_map_page(struct device *dev, struct page *page,
- size_t offset, size_t size,
- int direction)
-{
- struct dma_mapping_ops *ops = get_dma_ops(dev);
-
- BUG_ON(!valid_dma_direction(direction));
- return ops->map_page(dev, page, offset, size, direction, NULL);
-}
-
-static inline void dma_unmap_page(struct device *dev, dma_addr_t addr,
- size_t size, int direction)
-{
- dma_unmap_single(dev, addr, size, direction);
+ return daddr;
}
static inline void
dma_mask = dev->coherent_dma_mask;
if (!dma_mask)
- dma_mask = (gfp & GFP_DMA) ? DMA_24BIT_MASK : DMA_32BIT_MASK;
+ dma_mask = (gfp & GFP_DMA) ? DMA_BIT_MASK(24) : DMA_BIT_MASK(32);
return dma_mask;
}
{
unsigned long dma_mask = dma_alloc_coherent_mask(dev, gfp);
- if (dma_mask <= DMA_24BIT_MASK)
+ if (dma_mask <= DMA_BIT_MASK(24))
gfp |= GFP_DMA;
#ifdef CONFIG_X86_64
- if (dma_mask <= DMA_32BIT_MASK && !(gfp & GFP_DMA))
+ if (dma_mask <= DMA_BIT_MASK(32) && !(gfp & GFP_DMA))
gfp |= GFP_DMA32;
#endif
return gfp;
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);
+ struct dma_map_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) {
+ 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));
+ memory = ops->alloc_coherent(dev, size, dma_handle,
+ dma_alloc_coherent_gfp_flags(dev, gfp));
+ debug_dma_alloc_coherent(dev, size, *dma_handle, memory);
+
+ return memory;
}
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);
+ struct dma_map_ops *ops = get_dma_ops(dev);
WARN_ON(irqs_disabled()); /* for portability */
if (dma_release_from_coherent(dev, get_order(size), vaddr))
return;
+ debug_dma_free_coherent(dev, size, vaddr, bus);
if (ops->free_coherent)
ops->free_coherent(dev, size, vaddr, bus);
}
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