| /* dma.c: PCI and SBUS DMA accessors for 32-bit sparc. |
| * |
| * Copyright (C) 2008 David S. Miller <davem@davemloft.net> |
| */ |
| |
| #include <linux/kernel.h> |
| #include <linux/module.h> |
| #include <linux/dma-mapping.h> |
| #include <linux/scatterlist.h> |
| #include <linux/mm.h> |
| |
| #ifdef CONFIG_PCI |
| #include <linux/pci.h> |
| #endif |
| |
| #include "dma.h" |
| |
| int dma_supported(struct device *dev, u64 mask) |
| { |
| #ifdef CONFIG_PCI |
| if (dev->bus == &pci_bus_type) |
| return pci_dma_supported(to_pci_dev(dev), mask); |
| #endif |
| return 0; |
| } |
| EXPORT_SYMBOL(dma_supported); |
| |
| int dma_set_mask(struct device *dev, u64 dma_mask) |
| { |
| #ifdef CONFIG_PCI |
| if (dev->bus == &pci_bus_type) |
| return pci_set_dma_mask(to_pci_dev(dev), dma_mask); |
| #endif |
| return -EOPNOTSUPP; |
| } |
| EXPORT_SYMBOL(dma_set_mask); |
| |
| static void *dma32_alloc_coherent(struct device *dev, size_t size, |
| dma_addr_t *dma_handle, gfp_t flag) |
| { |
| #ifdef CONFIG_PCI |
| if (dev->bus == &pci_bus_type) |
| return pci_alloc_consistent(to_pci_dev(dev), size, dma_handle); |
| #endif |
| return sbus_alloc_consistent(dev, size, dma_handle); |
| } |
| |
| static void dma32_free_coherent(struct device *dev, size_t size, |
| void *cpu_addr, dma_addr_t dma_handle) |
| { |
| #ifdef CONFIG_PCI |
| if (dev->bus == &pci_bus_type) { |
| pci_free_consistent(to_pci_dev(dev), size, |
| cpu_addr, dma_handle); |
| return; |
| } |
| #endif |
| sbus_free_consistent(dev, size, cpu_addr, dma_handle); |
| } |
| |
| static dma_addr_t dma32_map_page(struct device *dev, struct page *page, |
| unsigned long offset, size_t size, |
| enum dma_data_direction direction, |
| struct dma_attrs *attrs) |
| { |
| #ifdef CONFIG_PCI |
| if (dev->bus == &pci_bus_type) |
| return pci_map_page(to_pci_dev(dev), page, offset, |
| size, (int)direction); |
| #endif |
| return sbus_map_single(dev, page_address(page) + offset, |
| size, (int)direction); |
| } |
| |
| static void dma32_unmap_page(struct device *dev, dma_addr_t dma_address, |
| size_t size, enum dma_data_direction direction, |
| struct dma_attrs *attrs) |
| { |
| #ifdef CONFIG_PCI |
| if (dev->bus == &pci_bus_type) { |
| pci_unmap_page(to_pci_dev(dev), dma_address, |
| size, (int)direction); |
| return; |
| } |
| #endif |
| sbus_unmap_single(dev, dma_address, size, (int)direction); |
| } |
| |
| static int dma32_map_sg(struct device *dev, struct scatterlist *sg, |
| int nents, enum dma_data_direction direction, |
| struct dma_attrs *attrs) |
| { |
| #ifdef CONFIG_PCI |
| if (dev->bus == &pci_bus_type) |
| return pci_map_sg(to_pci_dev(dev), sg, nents, (int)direction); |
| #endif |
| return sbus_map_sg(dev, sg, nents, direction); |
| } |
| |
| void dma32_unmap_sg(struct device *dev, struct scatterlist *sg, |
| int nents, enum dma_data_direction direction, |
| struct dma_attrs *attrs) |
| { |
| #ifdef CONFIG_PCI |
| if (dev->bus == &pci_bus_type) { |
| pci_unmap_sg(to_pci_dev(dev), sg, nents, (int)direction); |
| return; |
| } |
| #endif |
| sbus_unmap_sg(dev, sg, nents, (int)direction); |
| } |
| |
| static void dma32_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle, |
| size_t size, |
| enum dma_data_direction direction) |
| { |
| #ifdef CONFIG_PCI |
| if (dev->bus == &pci_bus_type) { |
| pci_dma_sync_single_for_cpu(to_pci_dev(dev), dma_handle, |
| size, (int)direction); |
| return; |
| } |
| #endif |
| sbus_dma_sync_single_for_cpu(dev, dma_handle, size, (int) direction); |
| } |
| |
| static void dma32_sync_single_for_device(struct device *dev, |
| dma_addr_t dma_handle, size_t size, |
| enum dma_data_direction direction) |
| { |
| #ifdef CONFIG_PCI |
| if (dev->bus == &pci_bus_type) { |
| pci_dma_sync_single_for_device(to_pci_dev(dev), dma_handle, |
| size, (int)direction); |
| return; |
| } |
| #endif |
| sbus_dma_sync_single_for_device(dev, dma_handle, size, (int) direction); |
| } |
| |
| static void dma32_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg, |
| int nelems, enum dma_data_direction direction) |
| { |
| #ifdef CONFIG_PCI |
| if (dev->bus == &pci_bus_type) { |
| pci_dma_sync_sg_for_cpu(to_pci_dev(dev), sg, |
| nelems, (int)direction); |
| return; |
| } |
| #endif |
| BUG(); |
| } |
| |
| static void dma32_sync_sg_for_device(struct device *dev, |
| struct scatterlist *sg, int nelems, |
| enum dma_data_direction direction) |
| { |
| #ifdef CONFIG_PCI |
| if (dev->bus == &pci_bus_type) { |
| pci_dma_sync_sg_for_device(to_pci_dev(dev), sg, |
| nelems, (int)direction); |
| return; |
| } |
| #endif |
| BUG(); |
| } |
| |
| static struct dma_map_ops dma32_dma_ops = { |
| .alloc_coherent = dma32_alloc_coherent, |
| .free_coherent = dma32_free_coherent, |
| .map_page = dma32_map_page, |
| .unmap_page = dma32_unmap_page, |
| .map_sg = dma32_map_sg, |
| .unmap_sg = dma32_unmap_sg, |
| .sync_single_for_cpu = dma32_sync_single_for_cpu, |
| .sync_single_for_device = dma32_sync_single_for_device, |
| .sync_sg_for_cpu = dma32_sync_sg_for_cpu, |
| .sync_sg_for_device = dma32_sync_sg_for_device, |
| }; |
| |
| struct dma_map_ops *dma_ops = &dma32_dma_ops; |
| EXPORT_SYMBOL(dma_ops); |