summaryrefslogtreecommitdiff
path: root/include/asm-x86/dma-mapping.h
diff options
context:
space:
mode:
Diffstat (limited to 'include/asm-x86/dma-mapping.h')
-rw-r--r--include/asm-x86/dma-mapping.h308
1 files changed, 0 insertions, 308 deletions
diff --git a/include/asm-x86/dma-mapping.h b/include/asm-x86/dma-mapping.h
deleted file mode 100644
index 219c33d6361c..000000000000
--- a/include/asm-x86/dma-mapping.h
+++ /dev/null
@@ -1,308 +0,0 @@
-#ifndef ASM_X86__DMA_MAPPING_H
-#define ASM_X86__DMA_MAPPING_H
-
-/*
- * IOMMU interface. See Documentation/DMA-mapping.txt and DMA-API.txt for
- * documentation.
- */
-
-#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 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);
- dma_addr_t (*map_single)(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,
- 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);
- 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)
-{
-#ifdef CONFIG_X86_32
- return dma_ops;
-#else
- if (unlikely(!dev) || !dev->archdata.dma_ops)
- return dma_ops;
- else
- return dev->archdata.dma_ops;
-#endif /* ASM_X86__DMA_MAPPING_H */
-}
-
-/* Make sure we keep the same behaviour */
-static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
-{
-#ifdef CONFIG_X86_32
- return 0;
-#else
- struct dma_mapping_ops *ops = get_dma_ops(dev);
- if (ops->mapping_error)
- return ops->mapping_error(dev, dma_addr);
-
- return (dma_addr == bad_dma_address);
-#endif
-}
-
-#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)
-
-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)
-{
- struct dma_mapping_ops *ops = get_dma_ops(hwdev);
-
- BUG_ON(!valid_dma_direction(direction));
- return ops->map_single(hwdev, virt_to_phys(ptr), size, direction);
-}
-
-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_single)
- ops->unmap_single(dev, addr, size, direction);
-}
-
-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)
-{
- struct dma_mapping_ops *ops = get_dma_ops(hwdev);
-
- BUG_ON(!valid_dma_direction(direction));
- if (ops->unmap_sg)
- ops->unmap_sg(hwdev, sg, nents, direction);
-}
-
-static inline void
-dma_sync_single_for_cpu(struct device *hwdev, dma_addr_t dma_handle,
- size_t size, int direction)
-{
- 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();
-}
-
-static inline void
-dma_sync_single_for_device(struct device *hwdev, dma_addr_t dma_handle,
- size_t size, int direction)
-{
- 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_single(dev, page_to_phys(page) + offset,
- size, direction);
-}
-
-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);
-}
-
-static inline void
-dma_cache_sync(struct device *dev, void *vaddr, size_t size,
- enum dma_data_direction dir)
-{
- flush_write_buffers();
-}
-
-static inline int dma_get_cache_alignment(void)
-{
- /* no easy way to get cache size on all x86, so return the
- * maximum possible, to be safe */
- return boot_cpu_data.x86_clflush_size;
-}
-
-static inline unsigned long dma_alloc_coherent_mask(struct device *dev,
- gfp_t gfp)
-{
- unsigned long dma_mask = 0;
-
- 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
generated by cgit v1.2.3 (git 2.39.0) at 2024-12-27 19:10:14 +0300