1#ifndef __SPARC_PCI_H 2#define __SPARC_PCI_H 3 4#ifdef __KERNEL__ 5 6/* Can be used to override the logic in pci_scan_bus for skipping 7 * already-configured bus numbers - to be used for buggy BIOSes 8 * or architectures with incomplete PCI setup by the loader. 9 */ 10#define pcibios_assign_all_busses() 0 11 12#define PCIBIOS_MIN_IO 0UL 13#define PCIBIOS_MIN_MEM 0UL 14 15#define PCI_IRQ_NONE 0xffffffff 16 17extern inline void pcibios_set_master(struct pci_dev *dev) 18{ 19 /* No special bus mastering setup handling */ 20} 21 22extern inline void pcibios_penalize_isa_irq(int irq) 23{ 24 /* We don't do dynamic PCI IRQ allocation */ 25} 26 27/* Dynamic DMA mapping stuff. 28 */ 29 30/* The PCI address space does not equal the physical memory 31 * address space. The networking and block device layers use 32 * this boolean for bounce buffer decisions. 33 */ 34#define PCI_DMA_BUS_IS_PHYS (0) 35 36#include <asm/scatterlist.h> 37 38struct pci_dev; 39 40/* Allocate and map kernel buffer using consistent mode DMA for a device. 41 * hwdev should be valid struct pci_dev pointer for PCI devices. 42 */ 43extern void *pci_alloc_consistent(struct pci_dev *hwdev, size_t size, dma_addr_t *dma_handle); 44 45/* Free and unmap a consistent DMA buffer. 46 * cpu_addr is what was returned from pci_alloc_consistent, 47 * size must be the same as what as passed into pci_alloc_consistent, 48 * and likewise dma_addr must be the same as what *dma_addrp was set to. 49 * 50 * References to the memory and mappings assosciated with cpu_addr/dma_addr 51 * past this call are illegal. 52 */ 53extern void pci_free_consistent(struct pci_dev *hwdev, size_t size, void *vaddr, dma_addr_t dma_handle); 54 55/* Map a single buffer of the indicated size for DMA in streaming mode. 56 * The 32-bit bus address to use is returned. 57 * 58 * Once the device is given the dma address, the device owns this memory 59 * until either pci_unmap_single or pci_dma_sync_single is performed. 60 */ 61extern dma_addr_t pci_map_single(struct pci_dev *hwdev, void *ptr, size_t size, int direction); 62 63/* Unmap a single streaming mode DMA translation. The dma_addr and size 64 * must match what was provided for in a previous pci_map_single call. All 65 * other usages are undefined. 66 * 67 * After this call, reads by the cpu to the buffer are guarenteed to see 68 * whatever the device wrote there. 69 */ 70extern void pci_unmap_single(struct pci_dev *hwdev, dma_addr_t dma_addr, size_t size, int direction); 71 72/* pci_unmap_{single,page} is not a nop, thus... */ 73#define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME) \ 74 dma_addr_t ADDR_NAME; 75#define DECLARE_PCI_UNMAP_LEN(LEN_NAME) \ 76 __u32 LEN_NAME; 77#define pci_unmap_addr(PTR, ADDR_NAME) \ 78 ((PTR)->ADDR_NAME) 79#define pci_unmap_addr_set(PTR, ADDR_NAME, VAL) \ 80 (((PTR)->ADDR_NAME) = (VAL)) 81#define pci_unmap_len(PTR, LEN_NAME) \ 82 ((PTR)->LEN_NAME) 83#define pci_unmap_len_set(PTR, LEN_NAME, VAL) \ 84 (((PTR)->LEN_NAME) = (VAL)) 85 86/* Map a set of buffers described by scatterlist in streaming 87 * mode for DMA. This is the scather-gather version of the 88 * above pci_map_single interface. Here the scatter gather list 89 * elements are each tagged with the appropriate dma address 90 * and length. They are obtained via sg_dma_{address,length}(SG). 91 * 92 * NOTE: An implementation may be able to use a smaller number of 93 * DMA address/length pairs than there are SG table elements. 94 * (for example via virtual mapping capabilities) 95 * The routine returns the number of addr/length pairs actually 96 * used, at most nents. 97 * 98 * Device ownership issues as mentioned above for pci_map_single are 99 * the same here. 100 */ 101extern int pci_map_sg(struct pci_dev *hwdev, struct scatterlist *sg, int nents, int direction); 102 103/* Unmap a set of streaming mode DMA translations. 104 * Again, cpu read rules concerning calls here are the same as for 105 * pci_unmap_single() above. 106 */ 107extern void pci_unmap_sg(struct pci_dev *hwdev, struct scatterlist *sg, int nhwents, int direction); 108 109/* Make physical memory consistent for a single 110 * streaming mode DMA translation after a transfer. 111 * 112 * If you perform a pci_map_single() but wish to interrogate the 113 * buffer using the cpu, yet do not wish to teardown the PCI dma 114 * mapping, you must call this function before doing so. At the 115 * next point you give the PCI dma address back to the card, the 116 * device again owns the buffer. 117 */ 118extern void pci_dma_sync_single(struct pci_dev *hwdev, dma_addr_t dma_handle, size_t size, int direction); 119 120/* Make physical memory consistent for a set of streaming 121 * mode DMA translations after a transfer. 122 * 123 * The same as pci_dma_sync_single but for a scatter-gather list, 124 * same rules and usage. 125 */ 126extern void pci_dma_sync_sg(struct pci_dev *hwdev, struct scatterlist *sg, int nelems, int direction); 127 128/* Return whether the given PCI device DMA address mask can 129 * be supported properly. For example, if your device can 130 * only drive the low 24-bits during PCI bus mastering, then 131 * you would pass 0x00ffffff as the mask to this function. 132 */ 133extern inline int pci_dma_supported(struct pci_dev *hwdev, u64 mask) 134{ 135 return 1; 136} 137 138#define pci_dac_dma_supported(dev, mask) (0) 139 140/* Return the index of the PCI controller for device PDEV. */ 141#define pci_controller_num(PDEV) (0) 142 143#endif /* __KERNEL__ */ 144 145#endif /* __SPARC_PCI_H */ 146