diff options
Diffstat (limited to 'drivers/ieee1394/dma.h')
| -rw-r--r-- | drivers/ieee1394/dma.h | 78 |
1 files changed, 0 insertions, 78 deletions
diff --git a/drivers/ieee1394/dma.h b/drivers/ieee1394/dma.h deleted file mode 100644 index 061550a6fb9..00000000000 --- a/drivers/ieee1394/dma.h +++ /dev/null @@ -1,78 +0,0 @@ -/* - * DMA region bookkeeping routines - * - * Copyright (C) 2002 Maas Digital LLC - * - * This code is licensed under the GPL. See the file COPYING in the root - * directory of the kernel sources for details. - */ - -#ifndef IEEE1394_DMA_H -#define IEEE1394_DMA_H - -#include <linux/pci.h> -#include <asm/scatterlist.h> - -/* struct dma_prog_region - - a small, physically-contiguous DMA buffer with random-access, - synchronous usage characteristics -*/ - -struct dma_prog_region { - unsigned char *kvirt; /* kernel virtual address */ - struct pci_dev *dev; /* PCI device */ - unsigned int n_pages; /* # of kernel pages */ - dma_addr_t bus_addr; /* base bus address */ -}; - -/* clear out all fields but do not allocate any memory */ -void dma_prog_region_init(struct dma_prog_region *prog); -int dma_prog_region_alloc(struct dma_prog_region *prog, unsigned long n_bytes, struct pci_dev *dev); -void dma_prog_region_free(struct dma_prog_region *prog); - -static inline dma_addr_t dma_prog_region_offset_to_bus(struct dma_prog_region *prog, unsigned long offset) -{ - return prog->bus_addr + offset; -} - -/* struct dma_region - - a large, non-physically-contiguous DMA buffer with streaming, - asynchronous usage characteristics -*/ - -struct dma_region { - unsigned char *kvirt; /* kernel virtual address */ - struct pci_dev *dev; /* PCI device */ - unsigned int n_pages; /* # of kernel pages */ - unsigned int n_dma_pages; /* # of IOMMU pages */ - struct scatterlist *sglist; /* IOMMU mapping */ - int direction; /* PCI_DMA_TODEVICE, etc */ -}; - -/* clear out all fields but do not allocate anything */ -void dma_region_init(struct dma_region *dma); - -/* allocate the buffer and map it to the IOMMU */ -int dma_region_alloc(struct dma_region *dma, unsigned long n_bytes, struct pci_dev *dev, int direction); - -/* unmap and free the buffer */ -void dma_region_free(struct dma_region *dma); - -/* sync the CPU's view of the buffer */ -void dma_region_sync_for_cpu(struct dma_region *dma, unsigned long offset, unsigned long len); -/* sync the IO bus' view of the buffer */ -void dma_region_sync_for_device(struct dma_region *dma, unsigned long offset, unsigned long len); - -/* map the buffer into a user space process */ -int dma_region_mmap(struct dma_region *dma, struct file *file, struct vm_area_struct *vma); - -/* macro to index into a DMA region (or dma_prog_region) */ -#define dma_region_i(_dma, _type, _index) ( ((_type*) ((_dma)->kvirt)) + (_index) ) - -/* return the DMA bus address of the byte with the given offset - relative to the beginning of the dma_region */ -dma_addr_t dma_region_offset_to_bus(struct dma_region *dma, unsigned long offset); - -#endif /* IEEE1394_DMA_H */ |
