#ifndef __SPARC64_PCI_H #define __SPARC64_PCI_H #ifdef __KERNEL__ #include #include /* 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_scan_all_fns(a, b) 0 #define PCIBIOS_MIN_IO 0UL #define PCIBIOS_MIN_MEM 0UL #define PCI_IRQ_NONE 0xffffffff #define PCI_CACHE_LINE_BYTES 64 static inline void pcibios_set_master(struct pci_dev *dev) { /* No special bus mastering setup handling */ } static inline void pcibios_penalize_isa_irq(int irq, int active) { /* 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 struct pci_dev; struct pci_iommu_ops { void *(*alloc_consistent)(struct pci_dev *, size_t, dma_addr_t *, gfp_t); void (*free_consistent)(struct pci_dev *, size_t, void *, dma_addr_t); dma_addr_t (*map_single)(struct pci_dev *, void *, size_t, int); void (*unmap_single)(struct pci_dev *, dma_addr_t, size_t, int); int (*map_sg)(struct pci_dev *, struct scatterlist *, int, int); void (*unmap_sg)(struct pci_dev *, struct scatterlist *, int, int); void (*dma_sync_single_for_cpu)(struct pci_dev *, dma_addr_t, size_t, int); void (*dma_sync_sg_for_cpu)(struct pci_dev *, struct scatterlist *, int, int); }; extern const struct pci_iommu_ops *pci_iommu_ops; /* Allocate and map kernel buffer using consistent mode DMA for a device. * hwdev should be valid struct pci_dev pointer for PCI devices. */ static inline void *pci_alloc_consistent(struct pci_dev *hwdev, size_t size, dma_addr_t *dma_handle) { return pci_iommu_ops->alloc_consistent(hwdev, size, dma_handle, GFP_ATOMIC); } /* 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 associated with cpu_addr/dma_addr * past this call are illegal. */ static inline void pci_free_consistent(struct pci_dev *hwdev, size_t size, void *vaddr, dma_addr_t dma_handle) { return pci_iommu_ops->free_consistent(hwdev, size, vaddr, 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_for_cpu is performed. */ static inline dma_addr_t pci_map_single(struct pci_dev *hwdev, void *ptr, size_t size, int direction) { return pci_iommu_ops->map_single(hwdev, ptr, size, 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 guaranteed to see * whatever the device wrote there. */ static inline void pci_unmap_single(struct pci_dev *hwdev, dma_addr_t dma_addr, size_t size, int direction) { pci_iommu_ops->unmap_single(hwdev, dma_addr, size, 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 scatter-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. */ static inline int pci_map_sg(struct pci_dev *hwdev, struct scatterlist *sg, int nents, int direction) { return pci_iommu_ops->map_sg(hwdev, sg, nents, 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. */ static inline void pci_unmap_sg(struct pci_dev *hwdev, struct scatterlist *sg, int nhwents, int direction) { pci_iommu_ops->unmap_sg(hwdev, sg, nhwents, 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, you * must first perform a pci_dma_sync_for_device, and then the * device again owns the buffer. */ static inline void pci_dma_sync_single_for_cpu(struct pci_dev *hwdev, dma_addr_t dma_handle, size_t size, int direction) { pci_iommu_ops->dma_sync_single_for_cpu(hwdev, dma_handle, size, direction); } static inline void pci_dma_sync_single_for_device(struct pci_dev *hwdev, dma_addr_t dma_handle, size_t size, int direction) { /* No flushing needed to sync cpu writes to the device. */ BUG_ON(direction == PCI_DMA_NONE); } /* 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. */ static inline void pci_dma_sync_sg_for_cpu(struct pci_dev *hwdev, struct scatterlist *sg, int nelems, int direction) { pci_iommu_ops->dma_sync_sg_for_cpu(hwdev, sg, nelems, direction); } static inline void pci_dma_sync_sg_for_device(struct pci_dev *hwdev, struct scatterlist *sg, int nelems, int direction) { /* No flushing needed to sync cpu writes to the device. */ BUG_ON(direction == PCI_DMA_NONE); } /* 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 0xfffc000000000000UL /* 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_for_cpu(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. */ } static inline void pci_dac_dma_sync_single_for_device(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. */ } #define PCI_DMA_ERROR_CODE (~(dma_addr_t)0x0) static inline int pci_dma_mapping_error(dma_addr_t dma_addr) { return (dma_addr == PCI_DMA_ERROR_CODE); } #ifdef CONFIG_PCI static inline void pci_dma_burst_advice(struct pci_dev *pdev, enum pci_dma_burst_strategy *strat, unsigned long *strategy_parameter) { unsigned long cacheline_size; u8 byte; pci_read_config_byte(pdev, PCI_CACHE_LINE_SIZE, &byte); if (byte == 0) cacheline_size = 1024; else cacheline_size = (int) byte * 4; *strat = PCI_DMA_BURST_BOUNDARY; *strategy_parameter = cacheline_size; } #endif /* Return the index of the PCI controller for device PDEV. */ extern int pci_domain_nr(struct pci_bus *bus); static inline int pci_proc_domain(struct pci_bus *bus) { return 1; } /* 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); extern void pcibios_resource_to_bus(struct pci_dev *dev, struct pci_bus_region *region, struct resource *res); extern void pcibios_bus_to_resource(struct pci_dev *dev, struct resource *res, struct pci_bus_region *region); extern struct resource *pcibios_select_root(struct pci_dev *, struct resource *); static inline int pci_get_legacy_ide_irq(struct pci_dev *dev, int channel) { return PCI_IRQ_NONE; } struct device_node; extern struct device_node *pci_device_to_OF_node(struct pci_dev *pdev); #endif /* __KERNEL__ */ #endif /* __SPARC64_PCI_H */