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#define pcibios_scan_all_fns(a, b) 0 12 13#define PCIBIOS_MIN_IO 0UL 14#define PCIBIOS_MIN_MEM 0UL 15 16#define PCI_IRQ_NONE 0xffffffff 17 18static inline void pcibios_set_master(struct pci_dev *dev) 19{ 20 /* No special bus mastering setup handling */ 21} 22 23static inline void pcibios_penalize_isa_irq(int irq, int active) 24{ 25 /* We don't do dynamic PCI IRQ allocation */ 26} 27 28/* Dynamic DMA mapping stuff. 29 */ 30#define PCI_DMA_BUS_IS_PHYS (0) 31 32#include <asm/scatterlist.h> 33 34struct pci_dev; 35 36/* Allocate and map kernel buffer using consistent mode DMA for a device. 37 * hwdev should be valid struct pci_dev pointer for PCI devices. 38 */ 39extern void *pci_alloc_consistent(struct pci_dev *hwdev, size_t size, dma_addr_t *dma_handle); 40 41/* Free and unmap a consistent DMA buffer. 42 * cpu_addr is what was returned from pci_alloc_consistent, 43 * size must be the same as what as passed into pci_alloc_consistent, 44 * and likewise dma_addr must be the same as what *dma_addrp was set to. 45 * 46 * References to the memory and mappings assosciated with cpu_addr/dma_addr 47 * past this call are illegal. 48 */ 49extern void pci_free_consistent(struct pci_dev *hwdev, size_t size, void *vaddr, dma_addr_t dma_handle); 50 51/* Map a single buffer of the indicated size for DMA in streaming mode. 52 * The 32-bit bus address to use is returned. 53 * 54 * Once the device is given the dma address, the device owns this memory 55 * until either pci_unmap_single or pci_dma_sync_single_for_cpu is performed. 56 */ 57extern dma_addr_t pci_map_single(struct pci_dev *hwdev, void *ptr, size_t size, int direction); 58 59/* Unmap a single streaming mode DMA translation. The dma_addr and size 60 * must match what was provided for in a previous pci_map_single call. All 61 * other usages are undefined. 62 * 63 * After this call, reads by the cpu to the buffer are guaranteed to see 64 * whatever the device wrote there. 65 */ 66extern void pci_unmap_single(struct pci_dev *hwdev, dma_addr_t dma_addr, size_t size, int direction); 67 68/* pci_unmap_{single,page} is not a nop, thus... */ 69#define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME) \ 70 dma_addr_t ADDR_NAME; 71#define DECLARE_PCI_UNMAP_LEN(LEN_NAME) \ 72 __u32 LEN_NAME; 73#define pci_unmap_addr(PTR, ADDR_NAME) \ 74 ((PTR)->ADDR_NAME) 75#define pci_unmap_addr_set(PTR, ADDR_NAME, VAL) \ 76 (((PTR)->ADDR_NAME) = (VAL)) 77#define pci_unmap_len(PTR, LEN_NAME) \ 78 ((PTR)->LEN_NAME) 79#define pci_unmap_len_set(PTR, LEN_NAME, VAL) \ 80 (((PTR)->LEN_NAME) = (VAL)) 81 82/* 83 * Same as above, only with pages instead of mapped addresses. 84 */ 85extern dma_addr_t pci_map_page(struct pci_dev *hwdev, struct page *page, 86 unsigned long offset, size_t size, int direction); 87extern void pci_unmap_page(struct pci_dev *hwdev, 88 dma_addr_t dma_address, size_t size, int direction); 89 90/* Map a set of buffers described by scatterlist in streaming 91 * mode for DMA. This is the scather-gather version of the 92 * above pci_map_single interface. Here the scatter gather list 93 * elements are each tagged with the appropriate dma address 94 * and length. They are obtained via sg_dma_{address,length}(SG). 95 * 96 * NOTE: An implementation may be able to use a smaller number of 97 * DMA address/length pairs than there are SG table elements. 98 * (for example via virtual mapping capabilities) 99 * The routine returns the number of addr/length pairs actually 100 * used, at most nents. 101 * 102 * Device ownership issues as mentioned above for pci_map_single are 103 * the same here. 104 */ 105extern int pci_map_sg(struct pci_dev *hwdev, struct scatterlist *sg, int nents, int direction); 106 107/* Unmap a set of streaming mode DMA translations. 108 * Again, cpu read rules concerning calls here are the same as for 109 * pci_unmap_single() above. 110 */ 111extern void pci_unmap_sg(struct pci_dev *hwdev, struct scatterlist *sg, int nhwents, int direction); 112 113/* Make physical memory consistent for a single 114 * streaming mode DMA translation after a transfer. 115 * 116 * If you perform a pci_map_single() but wish to interrogate the 117 * buffer using the cpu, yet do not wish to teardown the PCI dma 118 * mapping, you must call this function before doing so. At the 119 * next point you give the PCI dma address back to the card, you 120 * must first perform a pci_dma_sync_for_device, and then the device 121 * again owns the buffer. 122 */ 123extern void pci_dma_sync_single_for_cpu(struct pci_dev *hwdev, dma_addr_t dma_handle, size_t size, int direction); 124extern void pci_dma_sync_single_for_device(struct pci_dev *hwdev, dma_addr_t dma_handle, size_t size, int direction); 125 126/* Make physical memory consistent for a set of streaming 127 * mode DMA translations after a transfer. 128 * 129 * The same as pci_dma_sync_single_* but for a scatter-gather list, 130 * same rules and usage. 131 */ 132extern void pci_dma_sync_sg_for_cpu(struct pci_dev *hwdev, struct scatterlist *sg, int nelems, int direction); 133extern void pci_dma_sync_sg_for_device(struct pci_dev *hwdev, struct scatterlist *sg, int nelems, int direction); 134 135/* Return whether the given PCI device DMA address mask can 136 * be supported properly. For example, if your device can 137 * only drive the low 24-bits during PCI bus mastering, then 138 * you would pass 0x00ffffff as the mask to this function. 139 */ 140static inline int pci_dma_supported(struct pci_dev *hwdev, u64 mask) 141{ 142 return 1; 143} 144 145#define pci_dac_dma_supported(dev, mask) (0) 146 147#ifdef CONFIG_PCI 148static inline void pci_dma_burst_advice(struct pci_dev *pdev, 149 enum pci_dma_burst_strategy *strat, 150 unsigned long *strategy_parameter) 151{ 152 *strat = PCI_DMA_BURST_INFINITY; 153 *strategy_parameter = ~0UL; 154} 155#endif 156 157static inline void pcibios_add_platform_entries(struct pci_dev *dev) 158{ 159} 160 161#define PCI_DMA_ERROR_CODE (~(dma_addr_t)0x0) 162 163static inline int pci_dma_mapping_error(dma_addr_t dma_addr) 164{ 165 return (dma_addr == PCI_DMA_ERROR_CODE); 166} 167 168struct device_node; 169extern struct device_node *pci_device_to_OF_node(struct pci_dev *pdev); 170 171#endif /* __KERNEL__ */ 172 173/* generic pci stuff */ 174#include <asm-generic/pci.h> 175 176#endif /* __SPARC_PCI_H */ 177