pci.h
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上传日期:2013-02-24
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文件大小:7k
- #ifndef __ALPHA_PCI_H
- #define __ALPHA_PCI_H
- #ifdef __KERNEL__
- #include <linux/spinlock.h>
- #include <asm/scatterlist.h>
- #include <asm/machvec.h>
- /*
- * The following structure is used to manage multiple PCI busses.
- */
- struct pci_dev;
- struct pci_bus;
- struct resource;
- struct pci_iommu_arena;
- struct page;
- /* A controller. Used to manage multiple PCI busses. */
- struct pci_controller {
- struct pci_controller *next;
- struct pci_bus *bus;
- struct resource *io_space;
- struct resource *mem_space;
- /* The following are for reporting to userland. The invariant is
- that if we report a BWX-capable dense memory, we do not report
- a sparse memory at all, even if it exists. */
- unsigned long sparse_mem_base;
- unsigned long dense_mem_base;
- unsigned long sparse_io_base;
- unsigned long dense_io_base;
- /* This one's for the kernel only. It's in KSEG somewhere. */
- unsigned long config_space_base;
- unsigned int index;
- unsigned int first_busno;
- unsigned int last_busno;
- struct pci_iommu_arena *sg_pci;
- struct pci_iommu_arena *sg_isa;
- };
- /* Override the logic in pci_scan_bus for skipping already-configured
- bus numbers. */
- #define pcibios_assign_all_busses() 1
- #define PCIBIOS_MIN_IO alpha_mv.min_io_address
- #define PCIBIOS_MIN_MEM alpha_mv.min_mem_address
- extern void pcibios_set_master(struct pci_dev *dev);
- extern inline void pcibios_penalize_isa_irq(int irq)
- {
- /* We don't do dynamic PCI IRQ allocation */
- }
- /* IOMMU controls. */
- /* 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
- /* Allocate and map kernel buffer using consistant mode DMA for PCI
- device. Returns non-NULL cpu-view pointer to the buffer if
- successful and sets *DMA_ADDRP to the pci side dma address as well,
- else DMA_ADDRP is undefined. */
- extern void *pci_alloc_consistent(struct pci_dev *, size_t, dma_addr_t *);
- /* Free and unmap a consistant DMA buffer. CPU_ADDR and DMA_ADDR must
- be values that were returned from pci_alloc_consistant. SIZE must
- be the same as what as passed into pci_alloc_consistant.
- References to the memory and mappings assosciated with CPU_ADDR or
- DMA_ADDR past this call are illegal. */
- extern void pci_free_consistent(struct pci_dev *, size_t, void *, dma_addr_t);
- /* Map a single buffer of the indicate size for PCI DMA in streaming
- mode. The 32-bit PCI bus mastering 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 *, void *, size_t, int);
- /* Likewise, but for a page instead of an address. */
- extern dma_addr_t pci_map_page(struct pci_dev *, struct page *,
- unsigned long, size_t, int);
- /* 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 *, dma_addr_t, size_t, int);
- extern void pci_unmap_page(struct pci_dev *, dma_addr_t, size_t, int);
- /* 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
- PCI 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 PCI 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 *, struct scatterlist *, int, int);
- /* 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 *, struct scatterlist *, int, int);
- /* Make physical memory consistant 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. */
- static inline void
- pci_dma_sync_single(struct pci_dev *dev, dma_addr_t dma_addr, long size,
- int direction)
- {
- /* Nothing to do. */
- }
- /* Make physical memory consistant 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. */
- static inline void
- pci_dma_sync_sg(struct pci_dev *dev, struct scatterlist *sg, int nents,
- int direction)
- {
- /* Nothing to do. */
- }
- /* 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);
- /* True if the machine supports DAC addressing, and DEV can
- make use of it given MASK. */
- extern int pci_dac_dma_supported(struct pci_dev *hwdev, u64 mask);
- /* Convert to/from DAC dma address and struct page. */
- extern dma64_addr_t pci_dac_page_to_dma(struct pci_dev *, struct page *, unsigned long, int);
- extern struct page *pci_dac_dma_to_page(struct pci_dev *, dma64_addr_t);
- extern unsigned long pci_dac_dma_to_offset(struct pci_dev *, dma64_addr_t);
- static __inline__ void
- pci_dac_dma_sync_single(struct pci_dev *pdev, dma64_addr_t dma_addr, size_t len, int direction)
- {
- /* Nothing to do. */
- }
- /* Return the index of the PCI controller for device PDEV. */
- extern int pci_controller_num(struct pci_dev *pdev);
- #endif /* __KERNEL__ */
- /* Values for the `which' argument to sys_pciconfig_iobase. */
- #define IOBASE_HOSE 0
- #define IOBASE_SPARSE_MEM 1
- #define IOBASE_DENSE_MEM 2
- #define IOBASE_SPARSE_IO 3
- #define IOBASE_DENSE_IO 4
- #define IOBASE_ROOT_BUS 5
- #define IOBASE_FROM_HOSE 0x10000
- #endif /* __ALPHA_PCI_H */