228 строки
5.7 KiB
C
228 строки
5.7 KiB
C
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/* dma.c: PCI and SBUS DMA accessors for 32-bit sparc.
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*
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* Copyright (C) 2008 David S. Miller <davem@davemloft.net>
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/dma-mapping.h>
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#include <linux/scatterlist.h>
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#include <linux/mm.h>
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#ifdef CONFIG_PCI
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#include <linux/pci.h>
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#endif
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#include "dma.h"
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int dma_supported(struct device *dev, u64 mask)
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{
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#ifdef CONFIG_PCI
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if (dev->bus == &pci_bus_type)
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return pci_dma_supported(to_pci_dev(dev), mask);
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#endif
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return 0;
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}
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EXPORT_SYMBOL(dma_supported);
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int dma_set_mask(struct device *dev, u64 dma_mask)
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{
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#ifdef CONFIG_PCI
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if (dev->bus == &pci_bus_type)
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return pci_set_dma_mask(to_pci_dev(dev), dma_mask);
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#endif
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return -EOPNOTSUPP;
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}
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EXPORT_SYMBOL(dma_set_mask);
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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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#ifdef CONFIG_PCI
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if (dev->bus == &pci_bus_type)
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return pci_alloc_consistent(to_pci_dev(dev), size, dma_handle);
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#endif
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return sbus_alloc_consistent(dev, size, dma_handle);
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}
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EXPORT_SYMBOL(dma_alloc_coherent);
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void dma_free_coherent(struct device *dev, size_t size,
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void *cpu_addr, dma_addr_t dma_handle)
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{
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#ifdef CONFIG_PCI
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if (dev->bus == &pci_bus_type) {
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pci_free_consistent(to_pci_dev(dev), size,
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cpu_addr, dma_handle);
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return;
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}
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#endif
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sbus_free_consistent(dev, size, cpu_addr, dma_handle);
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}
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EXPORT_SYMBOL(dma_free_coherent);
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dma_addr_t dma_map_single(struct device *dev, void *cpu_addr,
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size_t size, enum dma_data_direction direction)
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{
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#ifdef CONFIG_PCI
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if (dev->bus == &pci_bus_type)
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return pci_map_single(to_pci_dev(dev), cpu_addr,
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size, (int)direction);
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#endif
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return sbus_map_single(dev, cpu_addr, size, (int)direction);
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}
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EXPORT_SYMBOL(dma_map_single);
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void dma_unmap_single(struct device *dev, dma_addr_t dma_addr,
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size_t size,
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enum dma_data_direction direction)
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{
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#ifdef CONFIG_PCI
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if (dev->bus == &pci_bus_type) {
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pci_unmap_single(to_pci_dev(dev), dma_addr,
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size, (int)direction);
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return;
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}
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#endif
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sbus_unmap_single(dev, dma_addr, size, (int)direction);
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}
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EXPORT_SYMBOL(dma_unmap_single);
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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 direction)
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{
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#ifdef CONFIG_PCI
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if (dev->bus == &pci_bus_type)
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return pci_map_page(to_pci_dev(dev), page, offset,
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size, (int)direction);
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#endif
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return sbus_map_single(dev, page_address(page) + offset,
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size, (int)direction);
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}
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EXPORT_SYMBOL(dma_map_page);
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void dma_unmap_page(struct device *dev, dma_addr_t dma_address,
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size_t size, enum dma_data_direction direction)
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{
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#ifdef CONFIG_PCI
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if (dev->bus == &pci_bus_type) {
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pci_unmap_page(to_pci_dev(dev), dma_address,
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size, (int)direction);
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return;
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}
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#endif
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sbus_unmap_single(dev, dma_address, size, (int)direction);
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}
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EXPORT_SYMBOL(dma_unmap_page);
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int dma_map_sg(struct device *dev, struct scatterlist *sg,
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int nents, enum dma_data_direction direction)
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{
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#ifdef CONFIG_PCI
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if (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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#endif
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return sbus_map_sg(dev, sg, nents, direction);
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}
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EXPORT_SYMBOL(dma_map_sg);
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void dma_unmap_sg(struct device *dev, struct scatterlist *sg,
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int nents, enum dma_data_direction direction)
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{
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#ifdef CONFIG_PCI
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if (dev->bus == &pci_bus_type) {
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pci_unmap_sg(to_pci_dev(dev), sg, nents, (int)direction);
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return;
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}
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#endif
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sbus_unmap_sg(dev, sg, nents, (int)direction);
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}
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EXPORT_SYMBOL(dma_unmap_sg);
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void dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle,
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size_t size, enum dma_data_direction direction)
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{
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#ifdef CONFIG_PCI
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if (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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return;
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}
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#endif
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sbus_dma_sync_single_for_cpu(dev, dma_handle, size, (int) direction);
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}
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EXPORT_SYMBOL(dma_sync_single_for_cpu);
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void dma_sync_single_for_device(struct device *dev, dma_addr_t dma_handle,
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size_t size, enum dma_data_direction direction)
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{
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#ifdef CONFIG_PCI
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if (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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return;
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}
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#endif
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sbus_dma_sync_single_for_device(dev, dma_handle, size, (int) direction);
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}
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EXPORT_SYMBOL(dma_sync_single_for_device);
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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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}
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EXPORT_SYMBOL(dma_sync_single_range_for_cpu);
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void dma_sync_single_range_for_device(struct device *dev, dma_addr_t dma_handle,
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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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dma_sync_single_for_device(dev, dma_handle+offset, size, direction);
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}
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EXPORT_SYMBOL(dma_sync_single_range_for_device);
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void dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg,
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int nelems, enum dma_data_direction direction)
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{
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#ifdef CONFIG_PCI
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if (dev->bus == &pci_bus_type) {
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pci_dma_sync_sg_for_cpu(to_pci_dev(dev), sg,
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nelems, (int)direction);
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return;
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}
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#endif
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BUG();
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}
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EXPORT_SYMBOL(dma_sync_sg_for_cpu);
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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 direction)
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{
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#ifdef CONFIG_PCI
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if (dev->bus == &pci_bus_type) {
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pci_dma_sync_sg_for_device(to_pci_dev(dev), sg,
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nelems, (int)direction);
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return;
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}
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#endif
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BUG();
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}
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EXPORT_SYMBOL(dma_sync_sg_for_device);
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int dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
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{
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return (dma_addr == DMA_ERROR_CODE);
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}
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EXPORT_SYMBOL(dma_mapping_error);
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int dma_get_cache_alignment(void)
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{
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return 32;
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}
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EXPORT_SYMBOL(dma_get_cache_alignment);
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