diff options
Diffstat (limited to 'include/asm-sparc/pci.h')
| -rw-r--r-- | include/asm-sparc/pci.h | 163 |
1 files changed, 163 insertions, 0 deletions
diff --git a/include/asm-sparc/pci.h b/include/asm-sparc/pci.h new file mode 100644 index 00000000000..d200a25a737 --- /dev/null +++ b/include/asm-sparc/pci.h @@ -0,0 +1,163 @@ +#ifndef __SPARC_PCI_H +#define __SPARC_PCI_H + +#ifdef __KERNEL__ + +/* 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 + +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. + */ +#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_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); + +/* 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)) + +/* + * Same as above, only with pages instead of mapped addresses. + */ +extern dma_addr_t pci_map_page(struct pci_dev *hwdev, struct page *page, + unsigned long offset, size_t size, int direction); +extern void pci_unmap_page(struct pci_dev *hwdev, + dma_addr_t dma_address, size_t size, int direction); + +/* 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, 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); +extern void pci_dma_sync_single_for_device(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_for_cpu(struct pci_dev *hwdev, struct scatterlist *sg, int nelems, int direction); +extern void pci_dma_sync_sg_for_device(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 inline int pci_dma_supported(struct pci_dev *hwdev, u64 mask) +{ + return 1; +} + +#define pci_dac_dma_supported(dev, mask) (0) + +static inline void pcibios_add_platform_entries(struct pci_dev *dev) +{ +} + +#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); +} + +#endif /* __KERNEL__ */ + +/* generic pci stuff */ +#include <asm-generic/pci.h> + +#endif /* __SPARC_PCI_H */ |