172 lines
6.0 KiB
C
172 lines
6.0 KiB
C
#ifndef __SPARC_PCI_H
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#define __SPARC_PCI_H
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#ifdef __KERNEL__
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/* Can be used to override the logic in pci_scan_bus for skipping
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* already-configured bus numbers - to be used for buggy BIOSes
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* or architectures with incomplete PCI setup by the loader.
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*/
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#define pcibios_assign_all_busses() 0
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#define pcibios_scan_all_fns(a, b) 0
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#define PCIBIOS_MIN_IO 0UL
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#define PCIBIOS_MIN_MEM 0UL
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#define PCI_IRQ_NONE 0xffffffff
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static inline void pcibios_set_master(struct pci_dev *dev)
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{
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/* No special bus mastering setup handling */
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}
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static inline void pcibios_penalize_isa_irq(int irq, int active)
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{
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/* We don't do dynamic PCI IRQ allocation */
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}
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/* Dynamic DMA mapping stuff.
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*/
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#define PCI_DMA_BUS_IS_PHYS (0)
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#include <asm/scatterlist.h>
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struct pci_dev;
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/* Allocate and map kernel buffer using consistent mode DMA for a device.
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* hwdev should be valid struct pci_dev pointer for PCI devices.
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*/
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extern void *pci_alloc_consistent(struct pci_dev *hwdev, size_t size, dma_addr_t *dma_handle);
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/* Free and unmap a consistent DMA buffer.
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* cpu_addr is what was returned from pci_alloc_consistent,
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* size must be the same as what as passed into pci_alloc_consistent,
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* and likewise dma_addr must be the same as what *dma_addrp was set to.
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*
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* References to the memory and mappings assosciated with cpu_addr/dma_addr
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* past this call are illegal.
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*/
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extern void pci_free_consistent(struct pci_dev *hwdev, size_t size, void *vaddr, dma_addr_t dma_handle);
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/* Map a single buffer of the indicated size for DMA in streaming mode.
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* The 32-bit bus address to use is returned.
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*
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* Once the device is given the dma address, the device owns this memory
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* until either pci_unmap_single or pci_dma_sync_single_for_cpu is performed.
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*/
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extern dma_addr_t pci_map_single(struct pci_dev *hwdev, void *ptr, size_t size, int direction);
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/* Unmap a single streaming mode DMA translation. The dma_addr and size
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* must match what was provided for in a previous pci_map_single call. All
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* other usages are undefined.
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*
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* After this call, reads by the cpu to the buffer are guaranteed to see
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* whatever the device wrote there.
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*/
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extern void pci_unmap_single(struct pci_dev *hwdev, dma_addr_t dma_addr, size_t size, int direction);
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/* pci_unmap_{single,page} is not a nop, thus... */
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#define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME) \
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dma_addr_t ADDR_NAME;
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#define DECLARE_PCI_UNMAP_LEN(LEN_NAME) \
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__u32 LEN_NAME;
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#define pci_unmap_addr(PTR, ADDR_NAME) \
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((PTR)->ADDR_NAME)
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#define pci_unmap_addr_set(PTR, ADDR_NAME, VAL) \
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(((PTR)->ADDR_NAME) = (VAL))
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#define pci_unmap_len(PTR, LEN_NAME) \
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((PTR)->LEN_NAME)
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#define pci_unmap_len_set(PTR, LEN_NAME, VAL) \
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(((PTR)->LEN_NAME) = (VAL))
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/*
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* Same as above, only with pages instead of mapped addresses.
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*/
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extern dma_addr_t pci_map_page(struct pci_dev *hwdev, struct page *page,
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unsigned long offset, size_t size, int direction);
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extern void pci_unmap_page(struct pci_dev *hwdev,
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dma_addr_t dma_address, size_t size, int direction);
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/* Map a set of buffers described by scatterlist in streaming
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* mode for DMA. This is the scather-gather version of the
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* above pci_map_single interface. Here the scatter gather list
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* elements are each tagged with the appropriate dma address
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* and length. They are obtained via sg_dma_{address,length}(SG).
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*
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* NOTE: An implementation may be able to use a smaller number of
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* DMA address/length pairs than there are SG table elements.
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* (for example via virtual mapping capabilities)
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* The routine returns the number of addr/length pairs actually
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* used, at most nents.
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*
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* Device ownership issues as mentioned above for pci_map_single are
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* the same here.
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*/
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extern int pci_map_sg(struct pci_dev *hwdev, struct scatterlist *sg, int nents, int direction);
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/* Unmap a set of streaming mode DMA translations.
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* Again, cpu read rules concerning calls here are the same as for
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* pci_unmap_single() above.
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*/
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extern void pci_unmap_sg(struct pci_dev *hwdev, struct scatterlist *sg, int nhwents, int direction);
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/* Make physical memory consistent for a single
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* streaming mode DMA translation after a transfer.
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*
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* If you perform a pci_map_single() but wish to interrogate the
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* buffer using the cpu, yet do not wish to teardown the PCI dma
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* mapping, you must call this function before doing so. At the
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* next point you give the PCI dma address back to the card, you
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* must first perform a pci_dma_sync_for_device, and then the device
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* again owns the buffer.
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*/
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extern void pci_dma_sync_single_for_cpu(struct pci_dev *hwdev, dma_addr_t dma_handle, size_t size, int direction);
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extern void pci_dma_sync_single_for_device(struct pci_dev *hwdev, dma_addr_t dma_handle, size_t size, int direction);
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/* Make physical memory consistent for a set of streaming
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* mode DMA translations after a transfer.
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*
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* The same as pci_dma_sync_single_* but for a scatter-gather list,
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* same rules and usage.
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*/
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extern void pci_dma_sync_sg_for_cpu(struct pci_dev *hwdev, struct scatterlist *sg, int nelems, int direction);
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extern void pci_dma_sync_sg_for_device(struct pci_dev *hwdev, struct scatterlist *sg, int nelems, int direction);
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/* Return whether the given PCI device DMA address mask can
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* be supported properly. For example, if your device can
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* only drive the low 24-bits during PCI bus mastering, then
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* you would pass 0x00ffffff as the mask to this function.
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*/
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static inline int pci_dma_supported(struct pci_dev *hwdev, u64 mask)
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{
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return 1;
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}
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#ifdef CONFIG_PCI
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static inline void pci_dma_burst_advice(struct pci_dev *pdev,
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enum pci_dma_burst_strategy *strat,
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unsigned long *strategy_parameter)
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{
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*strat = PCI_DMA_BURST_INFINITY;
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*strategy_parameter = ~0UL;
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}
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#endif
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#define PCI_DMA_ERROR_CODE (~(dma_addr_t)0x0)
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static inline int pci_dma_mapping_error(struct pci_dev *pdev,
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dma_addr_t dma_addr)
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{
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return (dma_addr == PCI_DMA_ERROR_CODE);
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}
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struct device_node;
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extern struct device_node *pci_device_to_OF_node(struct pci_dev *pdev);
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#endif /* __KERNEL__ */
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/* generic pci stuff */
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#include <asm-generic/pci.h>
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#endif /* __SPARC_PCI_H */
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