diff options
Diffstat (limited to 'include/asm-sparc64/pci.h')
| -rw-r--r-- | include/asm-sparc64/pci.h | 264 |
1 files changed, 264 insertions, 0 deletions
diff --git a/include/asm-sparc64/pci.h b/include/asm-sparc64/pci.h new file mode 100644 index 000000000000..2a0c85cd1c11 --- /dev/null +++ b/include/asm-sparc64/pci.h @@ -0,0 +1,264 @@ +#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_scan_all_fns(a, b) 0 + +#define PCIBIOS_MIN_IO 0UL +#define PCIBIOS_MIN_MEM 0UL + +#define PCI_IRQ_NONE 0xffffffff + +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) +{ + /* 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 associated 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_for_cpu 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 guaranteed 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 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. + */ +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, you + * must first perform a pci_dma_sync_for_device, and then the + * device again owns the buffer. + */ +extern void pci_dma_sync_single_for_cpu(struct pci_dev *hwdev, dma_addr_t dma_handle, + size_t size, int 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. + */ +extern void pci_dma_sync_sg_for_cpu(struct pci_dev *hwdev, struct scatterlist *sg, int nelems, int 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); +} + +/* 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); + +/* Platform specific MWI support. */ +#define HAVE_ARCH_PCI_MWI +extern int pcibios_prep_mwi(struct pci_dev *dev); + +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); + +static inline void pcibios_add_platform_entries(struct pci_dev *dev) +{ +} + +static inline int pci_get_legacy_ide_irq(struct pci_dev *dev, int channel) +{ + return PCI_IRQ_NONE; +} + +#endif /* __KERNEL__ */ + +#endif /* __SPARC64_PCI_H */ |
