42f142371e
Using asm-generic/dma-mapping.h does not work because pushing the call down to pci_alloc_coherent() causes the gfp_t argument of dma_alloc_coherent() to be ignored. Fix this by implementing things directly, and adding a gfp_t argument we can use in the internal call down to the PCI DMA implementation of pci_alloc_coherent(). This fixes massive memory corruption when using the sound driver layer, which passes things like __GFP_COMP down into these routines and (correctly) expects that to work. Signed-off-by: David S. Miller <davem@davemloft.net>
167 lines
3.9 KiB
C
167 lines
3.9 KiB
C
#ifndef _ASM_SPARC64_DMA_MAPPING_H
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#define _ASM_SPARC64_DMA_MAPPING_H
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#include <linux/config.h>
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#ifdef CONFIG_PCI
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/* we implement the API below in terms of the existing PCI one,
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* so include it */
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#include <linux/pci.h>
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/* need struct page definitions */
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#include <linux/mm.h>
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static inline int
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dma_supported(struct device *dev, u64 mask)
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{
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BUG_ON(dev->bus != &pci_bus_type);
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return pci_dma_supported(to_pci_dev(dev), mask);
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}
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static inline int
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dma_set_mask(struct device *dev, u64 dma_mask)
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{
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BUG_ON(dev->bus != &pci_bus_type);
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return pci_set_dma_mask(to_pci_dev(dev), dma_mask);
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}
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static inline void *
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dma_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_handle,
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gfp_t flag)
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{
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BUG_ON(dev->bus != &pci_bus_type);
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return pci_iommu_ops->alloc_consistent(to_pci_dev(dev), size, dma_handle, flag);
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}
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static inline void
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dma_free_coherent(struct device *dev, size_t size, void *cpu_addr,
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dma_addr_t dma_handle)
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{
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BUG_ON(dev->bus != &pci_bus_type);
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pci_free_consistent(to_pci_dev(dev), size, cpu_addr, dma_handle);
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}
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static inline dma_addr_t
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dma_map_single(struct device *dev, void *cpu_addr, size_t size,
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enum dma_data_direction direction)
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{
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BUG_ON(dev->bus != &pci_bus_type);
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return pci_map_single(to_pci_dev(dev), cpu_addr, size, (int)direction);
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}
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static inline void
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dma_unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size,
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enum dma_data_direction direction)
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{
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BUG_ON(dev->bus != &pci_bus_type);
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pci_unmap_single(to_pci_dev(dev), dma_addr, size, (int)direction);
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}
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static inline dma_addr_t
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dma_map_page(struct device *dev, struct page *page,
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unsigned long offset, size_t size,
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enum dma_data_direction direction)
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{
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BUG_ON(dev->bus != &pci_bus_type);
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return pci_map_page(to_pci_dev(dev), page, offset, size, (int)direction);
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}
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static inline void
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dma_unmap_page(struct device *dev, dma_addr_t dma_address, size_t size,
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enum dma_data_direction direction)
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{
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BUG_ON(dev->bus != &pci_bus_type);
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pci_unmap_page(to_pci_dev(dev), dma_address, size, (int)direction);
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}
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static inline int
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dma_map_sg(struct device *dev, struct scatterlist *sg, int nents,
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enum dma_data_direction direction)
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{
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BUG_ON(dev->bus != &pci_bus_type);
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return pci_map_sg(to_pci_dev(dev), sg, nents, (int)direction);
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}
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static inline void
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dma_unmap_sg(struct device *dev, struct scatterlist *sg, int nhwentries,
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enum dma_data_direction direction)
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{
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BUG_ON(dev->bus != &pci_bus_type);
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pci_unmap_sg(to_pci_dev(dev), sg, nhwentries, (int)direction);
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}
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static inline void
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dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle, size_t size,
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enum dma_data_direction direction)
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{
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BUG_ON(dev->bus != &pci_bus_type);
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pci_dma_sync_single_for_cpu(to_pci_dev(dev), dma_handle,
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size, (int)direction);
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}
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static inline void
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dma_sync_single_for_device(struct device *dev, dma_addr_t dma_handle, size_t size,
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enum dma_data_direction direction)
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{
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BUG_ON(dev->bus != &pci_bus_type);
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pci_dma_sync_single_for_device(to_pci_dev(dev), dma_handle,
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size, (int)direction);
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}
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static inline void
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dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg, int nelems,
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enum dma_data_direction direction)
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{
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BUG_ON(dev->bus != &pci_bus_type);
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pci_dma_sync_sg_for_cpu(to_pci_dev(dev), sg, nelems, (int)direction);
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}
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static inline void
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dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg, int nelems,
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enum dma_data_direction direction)
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{
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BUG_ON(dev->bus != &pci_bus_type);
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pci_dma_sync_sg_for_device(to_pci_dev(dev), sg, nelems, (int)direction);
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}
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static inline int
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dma_mapping_error(dma_addr_t dma_addr)
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{
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return pci_dma_mapping_error(dma_addr);
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}
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#else
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struct device;
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static inline void *dma_alloc_coherent(struct device *dev, size_t size,
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dma_addr_t *dma_handle, gfp_t flag)
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{
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BUG();
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return NULL;
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}
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static inline void dma_free_coherent(struct device *dev, size_t size,
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void *vaddr, dma_addr_t dma_handle)
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{
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BUG();
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}
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#endif /* PCI */
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#endif /* _ASM_SPARC64_DMA_MAPPING_H */
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