| /* |
| * This file is subject to the terms and conditions of the GNU General Public |
| * License. See the file "COPYING" in the main directory of this archive |
| * for more details. |
| * |
| * Copyright (C) 2000 Ani Joshi <ajoshi@unixbox.com> |
| * Copyright (C) 2000, 2001 Ralf Baechle <ralf@gnu.org> |
| * swiped from i386, and cloned for MIPS by Geert, polished by Ralf. |
| */ |
| #include <linux/types.h> |
| #include <linux/mm.h> |
| #include <linux/module.h> |
| #include <linux/string.h> |
| #include <linux/pci.h> |
| |
| #include <asm/cache.h> |
| #include <asm/pci/bridge.h> |
| |
| #define pdev_to_baddr(pdev, addr) \ |
| (BRIDGE_CONTROLLER(pdev->bus)->baddr + (addr)) |
| #define dev_to_baddr(dev, addr) \ |
| pdev_to_baddr(to_pci_dev(dev), (addr)) |
| |
| void *dma_alloc_noncoherent(struct device *dev, size_t size, |
| dma_addr_t * dma_handle, gfp_t gfp) |
| { |
| void *ret; |
| |
| /* ignore region specifiers */ |
| gfp &= ~(__GFP_DMA | __GFP_HIGHMEM); |
| |
| if (dev == NULL || (dev->coherent_dma_mask < 0xffffffff)) |
| gfp |= GFP_DMA; |
| ret = (void *) __get_free_pages(gfp, get_order(size)); |
| |
| if (ret != NULL) { |
| memset(ret, 0, size); |
| *dma_handle = dev_to_baddr(dev, virt_to_phys(ret)); |
| } |
| |
| return ret; |
| } |
| |
| EXPORT_SYMBOL(dma_alloc_noncoherent); |
| |
| void *dma_alloc_coherent(struct device *dev, size_t size, |
| dma_addr_t * dma_handle, gfp_t gfp) |
| __attribute__((alias("dma_alloc_noncoherent"))); |
| |
| EXPORT_SYMBOL(dma_alloc_coherent); |
| |
| void dma_free_noncoherent(struct device *dev, size_t size, void *vaddr, |
| dma_addr_t dma_handle) |
| { |
| unsigned long addr = (unsigned long) vaddr; |
| |
| free_pages(addr, get_order(size)); |
| } |
| |
| EXPORT_SYMBOL(dma_free_noncoherent); |
| |
| void dma_free_coherent(struct device *dev, size_t size, void *vaddr, |
| dma_addr_t dma_handle) __attribute__((alias("dma_free_noncoherent"))); |
| |
| EXPORT_SYMBOL(dma_free_coherent); |
| |
| dma_addr_t dma_map_single(struct device *dev, void *ptr, size_t size, |
| enum dma_data_direction direction) |
| { |
| BUG_ON(direction == DMA_NONE); |
| |
| return dev_to_baddr(dev, __pa(ptr)); |
| } |
| |
| EXPORT_SYMBOL(dma_map_single); |
| |
| void dma_unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size, |
| enum dma_data_direction direction) |
| { |
| BUG_ON(direction == DMA_NONE); |
| } |
| |
| EXPORT_SYMBOL(dma_unmap_single); |
| |
| int dma_map_sg(struct device *dev, struct scatterlist *sg, int nents, |
| enum dma_data_direction direction) |
| { |
| int i; |
| |
| BUG_ON(direction == DMA_NONE); |
| |
| for (i = 0; i < nents; i++, sg++) { |
| sg->dma_address = (dma_addr_t) dev_to_baddr(dev, |
| page_to_phys(sg->page) + sg->offset); |
| } |
| |
| return nents; |
| } |
| |
| EXPORT_SYMBOL(dma_map_sg); |
| |
| dma_addr_t dma_map_page(struct device *dev, struct page *page, |
| unsigned long offset, size_t size, enum dma_data_direction direction) |
| { |
| BUG_ON(direction == DMA_NONE); |
| |
| return dev_to_baddr(dev, page_to_phys(page) + offset); |
| } |
| |
| EXPORT_SYMBOL(dma_map_page); |
| |
| void dma_unmap_page(struct device *dev, dma_addr_t dma_address, size_t size, |
| enum dma_data_direction direction) |
| { |
| BUG_ON(direction == DMA_NONE); |
| } |
| |
| EXPORT_SYMBOL(dma_unmap_page); |
| |
| void dma_unmap_sg(struct device *dev, struct scatterlist *sg, int nhwentries, |
| enum dma_data_direction direction) |
| { |
| BUG_ON(direction == DMA_NONE); |
| } |
| |
| EXPORT_SYMBOL(dma_unmap_sg); |
| |
| void dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle, size_t size, |
| enum dma_data_direction direction) |
| { |
| BUG_ON(direction == DMA_NONE); |
| } |
| |
| EXPORT_SYMBOL(dma_sync_single_for_cpu); |
| |
| void dma_sync_single_for_device(struct device *dev, dma_addr_t dma_handle, size_t size, |
| enum dma_data_direction direction) |
| { |
| BUG_ON(direction == DMA_NONE); |
| } |
| |
| EXPORT_SYMBOL(dma_sync_single_for_device); |
| |
| void dma_sync_single_range_for_cpu(struct device *dev, dma_addr_t dma_handle, |
| unsigned long offset, size_t size, |
| enum dma_data_direction direction) |
| { |
| BUG_ON(direction == DMA_NONE); |
| } |
| |
| EXPORT_SYMBOL(dma_sync_single_range_for_cpu); |
| |
| void dma_sync_single_range_for_device(struct device *dev, dma_addr_t dma_handle, |
| unsigned long offset, size_t size, |
| enum dma_data_direction direction) |
| { |
| BUG_ON(direction == DMA_NONE); |
| } |
| |
| EXPORT_SYMBOL(dma_sync_single_range_for_device); |
| |
| void dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg, int nelems, |
| enum dma_data_direction direction) |
| { |
| BUG_ON(direction == DMA_NONE); |
| } |
| |
| EXPORT_SYMBOL(dma_sync_sg_for_cpu); |
| |
| void dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg, int nelems, |
| enum dma_data_direction direction) |
| { |
| BUG_ON(direction == DMA_NONE); |
| } |
| |
| EXPORT_SYMBOL(dma_sync_sg_for_device); |
| |
| int dma_mapping_error(dma_addr_t dma_addr) |
| { |
| return 0; |
| } |
| |
| EXPORT_SYMBOL(dma_mapping_error); |
| |
| int dma_supported(struct device *dev, u64 mask) |
| { |
| /* |
| * we fall back to GFP_DMA when the mask isn't all 1s, |
| * so we can't guarantee allocations that must be |
| * within a tighter range than GFP_DMA.. |
| */ |
| if (mask < 0x00ffffff) |
| return 0; |
| |
| return 1; |
| } |
| |
| EXPORT_SYMBOL(dma_supported); |
| |
| int dma_is_consistent(struct device *dev, dma_addr_t dma_addr) |
| { |
| return 1; |
| } |
| |
| EXPORT_SYMBOL(dma_is_consistent); |
| |
| void dma_cache_sync(void *vaddr, size_t size, |
| enum dma_data_direction direction) |
| { |
| BUG_ON(direction == DMA_NONE); |
| } |
| |
| EXPORT_SYMBOL(dma_cache_sync); |
| |
| dma64_addr_t pci_dac_page_to_dma(struct pci_dev *pdev, |
| struct page *page, unsigned long offset, int direction) |
| { |
| dma64_addr_t addr = page_to_phys(page) + offset; |
| |
| return (dma64_addr_t) pdev_to_baddr(pdev, addr); |
| } |
| |
| EXPORT_SYMBOL(pci_dac_page_to_dma); |
| |
| struct page *pci_dac_dma_to_page(struct pci_dev *pdev, |
| dma64_addr_t dma_addr) |
| { |
| struct bridge_controller *bc = BRIDGE_CONTROLLER(pdev->bus); |
| |
| return pfn_to_page((dma_addr - bc->baddr) >> PAGE_SHIFT); |
| } |
| |
| EXPORT_SYMBOL(pci_dac_dma_to_page); |
| |
| unsigned long pci_dac_dma_to_offset(struct pci_dev *pdev, |
| dma64_addr_t dma_addr) |
| { |
| return dma_addr & ~PAGE_MASK; |
| } |
| |
| EXPORT_SYMBOL(pci_dac_dma_to_offset); |
| |
| void pci_dac_dma_sync_single_for_cpu(struct pci_dev *pdev, |
| dma64_addr_t dma_addr, size_t len, int direction) |
| { |
| BUG_ON(direction == PCI_DMA_NONE); |
| } |
| |
| EXPORT_SYMBOL(pci_dac_dma_sync_single_for_cpu); |
| |
| void pci_dac_dma_sync_single_for_device(struct pci_dev *pdev, |
| dma64_addr_t dma_addr, size_t len, int direction) |
| { |
| BUG_ON(direction == PCI_DMA_NONE); |
| } |
| |
| EXPORT_SYMBOL(pci_dac_dma_sync_single_for_device); |