pci.h
上传用户:jlfgdled
上传日期:2013-04-10
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文件大小:7k
- #ifndef __SPARC64_PCI_H
- #define __SPARC64_PCI_H
- #ifdef __KERNEL__
- #include <linux/fs.h>
- #include <linux/mm.h>
- /* Can be used to override the logic in pci_scan_bus for skipping
- * already-configured bus numbers - to be used for buggy BIOSes
- * or architectures with incomplete PCI setup by the loader.
- */
- #define pcibios_assign_all_busses() 0
- #define PCIBIOS_MIN_IO 0UL
- #define PCIBIOS_MIN_MEM 0UL
- #define PCI_IRQ_NONE 0xffffffff
- extern inline void pcibios_set_master(struct pci_dev *dev)
- {
- /* No special bus mastering setup handling */
- }
- extern inline void pcibios_penalize_isa_irq(int irq)
- {
- /* We don't do dynamic PCI IRQ allocation */
- }
- /* Dynamic DMA mapping stuff.
- */
- /* The PCI address space does not equal the physical memory
- * address space. The networking and block device layers use
- * this boolean for bounce buffer decisions.
- */
- #define PCI_DMA_BUS_IS_PHYS (0)
- #include <asm/scatterlist.h>
- struct pci_dev;
- /* Allocate and map kernel buffer using consistent mode DMA for a device.
- * hwdev should be valid struct pci_dev pointer for PCI devices.
- */
- extern void *pci_alloc_consistent(struct pci_dev *hwdev, size_t size, dma_addr_t *dma_handle);
- /* Free and unmap a consistent DMA buffer.
- * cpu_addr is what was returned from pci_alloc_consistent,
- * size must be the same as what as passed into pci_alloc_consistent,
- * and likewise dma_addr must be the same as what *dma_addrp was set to.
- *
- * References to the memory and mappings assosciated with cpu_addr/dma_addr
- * past this call are illegal.
- */
- extern void pci_free_consistent(struct pci_dev *hwdev, size_t size, void *vaddr, dma_addr_t dma_handle);
- /* Map a single buffer of the indicated size for DMA in streaming mode.
- * The 32-bit bus address to use is returned.
- *
- * Once the device is given the dma address, the device owns this memory
- * until either pci_unmap_single or pci_dma_sync_single is performed.
- */
- extern dma_addr_t pci_map_single(struct pci_dev *hwdev, void *ptr, size_t size, int direction);
- /* Unmap a single streaming mode DMA translation. The dma_addr and size
- * must match what was provided for in a previous pci_map_single call. All
- * other usages are undefined.
- *
- * After this call, reads by the cpu to the buffer are guarenteed to see
- * whatever the device wrote there.
- */
- extern void pci_unmap_single(struct pci_dev *hwdev, dma_addr_t dma_addr, size_t size, int direction);
- /* No highmem on sparc64, plus we have an IOMMU, so mapping pages is easy. */
- #define pci_map_page(dev, page, off, size, dir)
- pci_map_single(dev, (page_address(page) + (off)), size, dir)
- #define pci_unmap_page(dev,addr,sz,dir) pci_unmap_single(dev,addr,sz,dir)
- /* pci_unmap_{single,page} is not a nop, thus... */
- #define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME)
- dma_addr_t ADDR_NAME;
- #define DECLARE_PCI_UNMAP_LEN(LEN_NAME)
- __u32 LEN_NAME;
- #define pci_unmap_addr(PTR, ADDR_NAME)
- ((PTR)->ADDR_NAME)
- #define pci_unmap_addr_set(PTR, ADDR_NAME, VAL)
- (((PTR)->ADDR_NAME) = (VAL))
- #define pci_unmap_len(PTR, LEN_NAME)
- ((PTR)->LEN_NAME)
- #define pci_unmap_len_set(PTR, LEN_NAME, VAL)
- (((PTR)->LEN_NAME) = (VAL))
- /* Map a set of buffers described by scatterlist in streaming
- * mode for DMA. This is the scather-gather version of the
- * above pci_map_single interface. Here the scatter gather list
- * elements are each tagged with the appropriate dma address
- * and length. They are obtained via sg_dma_{address,length}(SG).
- *
- * NOTE: An implementation may be able to use a smaller number of
- * DMA address/length pairs than there are SG table elements.
- * (for example via virtual mapping capabilities)
- * The routine returns the number of addr/length pairs actually
- * used, at most nents.
- *
- * Device ownership issues as mentioned above for pci_map_single are
- * the same here.
- */
- extern int pci_map_sg(struct pci_dev *hwdev, struct scatterlist *sg,
- int nents, int direction);
- /* Unmap a set of streaming mode DMA translations.
- * Again, cpu read rules concerning calls here are the same as for
- * pci_unmap_single() above.
- */
- extern void pci_unmap_sg(struct pci_dev *hwdev, struct scatterlist *sg,
- int nhwents, int direction);
- /* Make physical memory consistent for a single
- * streaming mode DMA translation after a transfer.
- *
- * If you perform a pci_map_single() but wish to interrogate the
- * buffer using the cpu, yet do not wish to teardown the PCI dma
- * mapping, you must call this function before doing so. At the
- * next point you give the PCI dma address back to the card, the
- * device again owns the buffer.
- */
- extern void pci_dma_sync_single(struct pci_dev *hwdev, dma_addr_t dma_handle,
- size_t size, int direction);
- /* Make physical memory consistent for a set of streaming
- * mode DMA translations after a transfer.
- *
- * The same as pci_dma_sync_single but for a scatter-gather list,
- * same rules and usage.
- */
- extern void pci_dma_sync_sg(struct pci_dev *hwdev, struct scatterlist *sg, int nelems, int direction);
- /* Return whether the given PCI device DMA address mask can
- * be supported properly. For example, if your device can
- * only drive the low 24-bits during PCI bus mastering, then
- * you would pass 0x00ffffff as the mask to this function.
- */
- extern int pci_dma_supported(struct pci_dev *hwdev, u64 mask);
- /* PCI IOMMU mapping bypass support. */
- /* PCI 64-bit addressing works for all slots on all controller
- * types on sparc64. However, it requires that the device
- * can drive enough of the 64 bits.
- */
- #define PCI64_REQUIRED_MASK (~(dma64_addr_t)0)
- #define PCI64_ADDR_BASE 0xfffc000000000000
- /* Usage of the pci_dac_foo interfaces is only valid if this
- * test passes.
- */
- #define pci_dac_dma_supported(pci_dev, mask)
- ((((mask) & PCI64_REQUIRED_MASK) == PCI64_REQUIRED_MASK) ? 1 : 0)
- static __inline__ dma64_addr_t
- pci_dac_page_to_dma(struct pci_dev *pdev, struct page *page, unsigned long offset, int direction)
- {
- return (PCI64_ADDR_BASE +
- __pa(page_address(page)) + offset);
- }
- static __inline__ struct page *
- pci_dac_dma_to_page(struct pci_dev *pdev, dma64_addr_t dma_addr)
- {
- unsigned long paddr = (dma_addr & PAGE_MASK) - PCI64_ADDR_BASE;
- return virt_to_page(__va(paddr));
- }
- static __inline__ unsigned long
- pci_dac_dma_to_offset(struct pci_dev *pdev, dma64_addr_t dma_addr)
- {
- return (dma_addr & ~PAGE_MASK);
- }
- static __inline__ void
- pci_dac_dma_sync_single(struct pci_dev *pdev, dma64_addr_t dma_addr, size_t len, int direction)
- {
- /* DAC cycle addressing does not make use of the
- * PCI controller's streaming cache, so nothing to do.
- */
- }
- /* Return the index of the PCI controller for device PDEV. */
- extern int pci_controller_num(struct pci_dev *pdev);
- /* Platform support for /proc/bus/pci/X/Y mmap()s. */
- #define HAVE_PCI_MMAP
- #define HAVE_ARCH_PCI_GET_UNMAPPED_AREA
- #define get_pci_unmapped_area get_fb_unmapped_area
- extern int pci_mmap_page_range(struct pci_dev *dev, struct vm_area_struct *vma,
- enum pci_mmap_state mmap_state,
- int write_combine);
- #endif /* __KERNEL__ */
- #endif /* __SPARC64_PCI_H */