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sh: Convert to asm-generic/dma-mapping-common.h
This converts the old DMA mapping support to the new generic dma-mapping-common.h abstraction. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
Paul Mundt
parent
14c011deb4
commit
73c926bee0
@ -16,6 +16,7 @@ config SUPERH
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select HAVE_IOREMAP_PROT if MMU
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select HAVE_ARCH_TRACEHOOK
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select HAVE_DMA_API_DEBUG
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select HAVE_DMA_ATTRS
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select HAVE_PERF_EVENTS
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select HAVE_KERNEL_GZIP
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select HAVE_KERNEL_BZIP2
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@ -1,21 +1,32 @@
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#ifndef __ASM_SH_DMA_MAPPING_H
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#define __ASM_SH_DMA_MAPPING_H
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#include <linux/mm.h>
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#include <linux/scatterlist.h>
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#include <linux/dma-debug.h>
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#include <asm/cacheflush.h>
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#include <asm/io.h>
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#include <asm-generic/dma-coherent.h>
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extern struct dma_map_ops *dma_ops;
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extern void no_iommu_init(void);
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extern struct bus_type pci_bus_type;
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static inline struct dma_map_ops *get_dma_ops(struct device *dev)
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{
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return dma_ops;
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}
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#define dma_supported(dev, mask) (1)
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static inline int dma_supported(struct device *dev, u64 mask)
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{
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struct dma_map_ops *ops = get_dma_ops(dev);
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if (ops->dma_supported)
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return ops->dma_supported(dev, mask);
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return 1;
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}
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static inline int dma_set_mask(struct device *dev, u64 mask)
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{
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struct dma_map_ops *ops = get_dma_ops(dev);
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if (!dev->dma_mask || !dma_supported(dev, mask))
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return -EIO;
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if (ops->set_dma_mask)
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return ops->set_dma_mask(dev, mask);
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*dev->dma_mask = mask;
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@ -35,160 +46,6 @@ void dma_cache_sync(struct device *dev, void *vaddr, size_t size,
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#define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h)
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#define dma_is_consistent(d, h) (1)
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static inline dma_addr_t dma_map_single(struct device *dev,
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void *ptr, size_t size,
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enum dma_data_direction dir)
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{
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dma_addr_t addr = virt_to_phys(ptr);
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#if defined(CONFIG_PCI) && !defined(CONFIG_SH_PCIDMA_NONCOHERENT)
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if (dev->bus == &pci_bus_type)
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return addr;
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#endif
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dma_cache_sync(dev, ptr, size, dir);
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debug_dma_map_page(dev, virt_to_page(ptr),
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(unsigned long)ptr & ~PAGE_MASK, size,
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dir, addr, true);
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return addr;
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}
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static inline void dma_unmap_single(struct device *dev, dma_addr_t addr,
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size_t size, enum dma_data_direction dir)
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{
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debug_dma_unmap_page(dev, addr, size, dir, true);
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}
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static inline int dma_map_sg(struct device *dev, struct scatterlist *sg,
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int nents, enum dma_data_direction dir)
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{
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int i;
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for (i = 0; i < nents; i++) {
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#if !defined(CONFIG_PCI) || defined(CONFIG_SH_PCIDMA_NONCOHERENT)
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dma_cache_sync(dev, sg_virt(&sg[i]), sg[i].length, dir);
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#endif
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sg[i].dma_address = sg_phys(&sg[i]);
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sg[i].dma_length = sg[i].length;
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}
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debug_dma_map_sg(dev, sg, nents, i, dir);
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return nents;
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}
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static inline void dma_unmap_sg(struct device *dev, struct scatterlist *sg,
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int nents, enum dma_data_direction dir)
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{
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debug_dma_unmap_sg(dev, sg, nents, dir);
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}
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static inline dma_addr_t 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 dir)
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{
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return dma_map_single(dev, page_address(page) + offset, size, dir);
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}
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static inline void dma_unmap_page(struct device *dev, dma_addr_t dma_address,
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size_t size, enum dma_data_direction dir)
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{
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dma_unmap_single(dev, dma_address, size, dir);
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}
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static inline void __dma_sync_single(struct device *dev, dma_addr_t dma_handle,
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size_t size, enum dma_data_direction dir)
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{
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#if defined(CONFIG_PCI) && !defined(CONFIG_SH_PCIDMA_NONCOHERENT)
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if (dev->bus == &pci_bus_type)
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return;
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#endif
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dma_cache_sync(dev, phys_to_virt(dma_handle), size, dir);
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}
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static inline void dma_sync_single_range(struct device *dev,
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dma_addr_t dma_handle,
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unsigned long offset, size_t size,
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enum dma_data_direction dir)
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{
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#if defined(CONFIG_PCI) && !defined(CONFIG_SH_PCIDMA_NONCOHERENT)
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if (dev->bus == &pci_bus_type)
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return;
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#endif
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dma_cache_sync(dev, phys_to_virt(dma_handle) + offset, size, dir);
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}
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static inline void __dma_sync_sg(struct device *dev, struct scatterlist *sg,
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int nelems, enum dma_data_direction dir)
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{
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int i;
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for (i = 0; i < nelems; i++) {
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#if !defined(CONFIG_PCI) || defined(CONFIG_SH_PCIDMA_NONCOHERENT)
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dma_cache_sync(dev, sg_virt(&sg[i]), sg[i].length, dir);
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#endif
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sg[i].dma_address = sg_phys(&sg[i]);
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sg[i].dma_length = sg[i].length;
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}
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}
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static inline void dma_sync_single_for_cpu(struct device *dev,
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dma_addr_t dma_handle, size_t size,
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enum dma_data_direction dir)
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{
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__dma_sync_single(dev, dma_handle, size, dir);
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debug_dma_sync_single_for_cpu(dev, dma_handle, size, dir);
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}
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static inline void dma_sync_single_for_device(struct device *dev,
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dma_addr_t dma_handle,
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size_t size,
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enum dma_data_direction dir)
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{
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__dma_sync_single(dev, dma_handle, size, dir);
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debug_dma_sync_single_for_device(dev, dma_handle, size, dir);
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}
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static inline void dma_sync_single_range_for_cpu(struct device *dev,
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dma_addr_t dma_handle,
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unsigned long offset,
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size_t size,
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enum dma_data_direction direction)
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{
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dma_sync_single_for_cpu(dev, dma_handle+offset, size, direction);
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debug_dma_sync_single_range_for_cpu(dev, dma_handle,
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offset, size, direction);
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}
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static inline void dma_sync_single_range_for_device(struct device *dev,
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dma_addr_t dma_handle,
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unsigned long offset,
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size_t size,
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enum dma_data_direction direction)
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{
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dma_sync_single_for_device(dev, dma_handle+offset, size, direction);
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debug_dma_sync_single_range_for_device(dev, dma_handle,
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offset, size, direction);
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}
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static inline void dma_sync_sg_for_cpu(struct device *dev,
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struct scatterlist *sg, int nelems,
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enum dma_data_direction dir)
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{
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__dma_sync_sg(dev, sg, nelems, dir);
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debug_dma_sync_sg_for_cpu(dev, sg, nelems, dir);
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}
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static inline void dma_sync_sg_for_device(struct device *dev,
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struct scatterlist *sg, int nelems,
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enum dma_data_direction dir)
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{
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__dma_sync_sg(dev, sg, nelems, dir);
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debug_dma_sync_sg_for_device(dev, sg, nelems, dir);
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}
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static inline int dma_get_cache_alignment(void)
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{
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/*
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@ -200,20 +57,15 @@ static inline int dma_get_cache_alignment(void)
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static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
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{
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struct dma_map_ops *ops = get_dma_ops(dev);
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if (ops->mapping_error)
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return ops->mapping_error(dev, dma_addr);
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return dma_addr == 0;
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}
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#define ARCH_HAS_DMA_DECLARE_COHERENT_MEMORY
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extern int
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dma_declare_coherent_memory(struct device *dev, dma_addr_t bus_addr,
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dma_addr_t device_addr, size_t size, int flags);
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extern void
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dma_release_declared_memory(struct device *dev);
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extern void *
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dma_mark_declared_memory_occupied(struct device *dev,
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dma_addr_t device_addr, size_t size);
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#include <asm-generic/dma-coherent.h>
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#include <asm-generic/dma-mapping-common.h>
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#endif /* __ASM_SH_DMA_MAPPING_H */
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@ -3,8 +3,6 @@
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#ifdef __KERNEL__
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#include <linux/dma-mapping.h>
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/* Can be used to override the logic in pci_scan_bus for skipping
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already-configured bus numbers - to be used for buggy BIOSes
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or architectures with incomplete PCI setup by the loader */
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@ -54,13 +52,7 @@ static inline void pcibios_penalize_isa_irq(int irq, int active)
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* address space. The networking and block device layers use
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* this boolean for bounce buffer decisions.
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*/
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#define PCI_DMA_BUS_IS_PHYS (1)
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#include <linux/types.h>
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#include <linux/slab.h>
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#include <asm/scatterlist.h>
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#include <linux/string.h>
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#include <asm/io.h>
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#define PCI_DMA_BUS_IS_PHYS (dma_ops->is_phys)
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/* pci_unmap_{single,page} being a nop depends upon the
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* configuration.
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@ -11,7 +11,8 @@ endif
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CFLAGS_REMOVE_return_address.o = -pg
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obj-y := debugtraps.o dumpstack.o idle.o io.o io_generic.o irq.o \
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obj-y := debugtraps.o dma-nommu.o dumpstack.o \
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idle.o io.o io_generic.o irq.o \
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irq_$(BITS).o machvec.o nmi_debug.o process_$(BITS).o \
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ptrace_$(BITS).o return_address.o \
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setup.o signal_$(BITS).o sys_sh.o sys_sh$(BITS).o \
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76
arch/sh/kernel/dma-nommu.c
Normal file
76
arch/sh/kernel/dma-nommu.c
Normal file
@ -0,0 +1,76 @@
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/*
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* DMA mapping support for platforms lacking IOMMUs.
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*
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* Copyright (C) 2009 Paul Mundt
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*/
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#include <linux/dma-mapping.h>
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#include <linux/io.h>
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static dma_addr_t nommu_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 dir,
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struct dma_attrs *attrs)
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{
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dma_addr_t addr = page_to_phys(page) + offset;
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WARN_ON(size == 0);
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dma_cache_sync(dev, page_address(page) + offset, size, dir);
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return addr;
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}
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static int nommu_map_sg(struct device *dev, struct scatterlist *sg,
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int nents, enum dma_data_direction dir,
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struct dma_attrs *attrs)
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{
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struct scatterlist *s;
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int i;
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WARN_ON(nents == 0 || sg[0].length == 0);
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for_each_sg(sg, s, nents, i) {
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BUG_ON(!sg_page(s));
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dma_cache_sync(dev, sg_virt(s), s->length, dir);
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s->dma_address = sg_phys(s);
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s->dma_length = s->length;
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}
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return nents;
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}
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static void nommu_sync_single(struct device *dev, dma_addr_t addr,
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size_t size, enum dma_data_direction dir)
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{
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dma_cache_sync(dev, phys_to_virt(addr), size, dir);
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}
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static void nommu_sync_sg(struct device *dev, struct scatterlist *sg,
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int nelems, enum dma_data_direction dir)
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{
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struct scatterlist *s;
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int i;
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for_each_sg(sg, s, nelems, i)
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dma_cache_sync(dev, sg_virt(s), s->length, dir);
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}
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struct dma_map_ops nommu_dma_ops = {
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.map_page = nommu_map_page,
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.map_sg = nommu_map_sg,
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.sync_single_for_device = nommu_sync_single,
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.sync_sg_for_device = nommu_sync_sg,
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.is_phys = 1,
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};
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void __init no_iommu_init(void)
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{
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if (dma_ops)
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return;
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dma_ops = &nommu_dma_ops;
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}
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@ -15,14 +15,20 @@
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#include <linux/dma-mapping.h>
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#include <linux/dma-debug.h>
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#include <linux/io.h>
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#include <linux/module.h>
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#include <asm/cacheflush.h>
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#include <asm/addrspace.h>
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#define PREALLOC_DMA_DEBUG_ENTRIES 4096
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struct dma_map_ops *dma_ops;
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EXPORT_SYMBOL(dma_ops);
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static int __init dma_init(void)
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{
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dma_debug_init(PREALLOC_DMA_DEBUG_ENTRIES);
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no_iommu_init();
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return 0;
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}
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fs_initcall(dma_init);
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