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.
10 #define pcibios_assign_all_busses() 0
11 #define pcibios_scan_all_fns(a, b) 0
13 #define PCIBIOS_MIN_IO 0UL
14 #define PCIBIOS_MIN_MEM 0UL
16 #define PCI_IRQ_NONE 0xffffffff
18 extern inline void pcibios_set_master(struct pci_dev *dev)
20 /* No special bus mastering setup handling */
23 extern inline void pcibios_penalize_isa_irq(int irq)
25 /* We don't do dynamic PCI IRQ allocation */
28 /* Dynamic DMA mapping stuff.
30 #define PCI_DMA_BUS_IS_PHYS (0)
32 #include <asm/scatterlist.h>
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.
39 extern void *pci_alloc_consistent(struct pci_dev *hwdev, size_t size, dma_addr_t *dma_handle);
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.
46 * References to the memory and mappings assosciated with cpu_addr/dma_addr
47 * past this call are illegal.
49 extern void pci_free_consistent(struct pci_dev *hwdev, size_t size, void *vaddr, dma_addr_t dma_handle);
51 /* Map a single buffer of the indicated size for DMA in streaming mode.
52 * The 32-bit bus address to use is returned.
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.
57 extern dma_addr_t pci_map_single(struct pci_dev *hwdev, void *ptr, size_t size, int direction);
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.
63 * After this call, reads by the cpu to the buffer are guaranteed to see
64 * whatever the device wrote there.
66 extern void pci_unmap_single(struct pci_dev *hwdev, dma_addr_t dma_addr, size_t size, int direction);
68 /* pci_unmap_{single,page} is not a nop, thus... */
69 #define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME) \
71 #define DECLARE_PCI_UNMAP_LEN(LEN_NAME) \
73 #define pci_unmap_addr(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) \
79 #define pci_unmap_len_set(PTR, LEN_NAME, VAL) \
80 (((PTR)->LEN_NAME) = (VAL))
83 * Same as above, only with pages instead of mapped addresses.
85 extern dma_addr_t pci_map_page(struct pci_dev *hwdev, struct page *page,
86 unsigned long offset, size_t size, int direction);
87 extern void pci_unmap_page(struct pci_dev *hwdev,
88 dma_addr_t dma_address, size_t size, int direction);
90 /* map_page and map_single cannot fail */
91 static inline int pci_dma_mapping_error(dma_addr_t dma_addr)
96 /* Map a set of buffers described by scatterlist in streaming
97 * mode for DMA. This is the scather-gather version of the
98 * above pci_map_single interface. Here the scatter gather list
99 * elements are each tagged with the appropriate dma address
100 * and length. They are obtained via sg_dma_{address,length}(SG).
102 * NOTE: An implementation may be able to use a smaller number of
103 * DMA address/length pairs than there are SG table elements.
104 * (for example via virtual mapping capabilities)
105 * The routine returns the number of addr/length pairs actually
106 * used, at most nents.
108 * Device ownership issues as mentioned above for pci_map_single are
111 extern int pci_map_sg(struct pci_dev *hwdev, struct scatterlist *sg, int nents, int direction);
113 /* Unmap a set of streaming mode DMA translations.
114 * Again, cpu read rules concerning calls here are the same as for
115 * pci_unmap_single() above.
117 extern void pci_unmap_sg(struct pci_dev *hwdev, struct scatterlist *sg, int nhwents, int direction);
119 /* Make physical memory consistent for a single
120 * streaming mode DMA translation after a transfer.
122 * If you perform a pci_map_single() but wish to interrogate the
123 * buffer using the cpu, yet do not wish to teardown the PCI dma
124 * mapping, you must call this function before doing so. At the
125 * next point you give the PCI dma address back to the card, you
126 * must first perform a pci_dma_sync_for_device, and then the device
127 * again owns the buffer.
129 extern void pci_dma_sync_single_for_cpu(struct pci_dev *hwdev, dma_addr_t dma_handle, size_t size, int direction);
130 extern void pci_dma_sync_single_for_device(struct pci_dev *hwdev, dma_addr_t dma_handle, size_t size, int direction);
132 /* Make physical memory consistent for a set of streaming
133 * mode DMA translations after a transfer.
135 * The same as pci_dma_sync_single_* but for a scatter-gather list,
136 * same rules and usage.
138 extern void pci_dma_sync_sg_for_cpu(struct pci_dev *hwdev, struct scatterlist *sg, int nelems, int direction);
139 extern void pci_dma_sync_sg_for_device(struct pci_dev *hwdev, struct scatterlist *sg, int nelems, int direction);
141 /* Return whether the given PCI device DMA address mask can
142 * be supported properly. For example, if your device can
143 * only drive the low 24-bits during PCI bus mastering, then
144 * you would pass 0x00ffffff as the mask to this function.
146 extern inline int pci_dma_supported(struct pci_dev *hwdev, u64 mask)
151 #define pci_dac_dma_supported(dev, mask) (0)
153 static inline void pcibios_add_platform_entries(struct pci_dev *dev)
157 #endif /* __KERNEL__ */
159 /* generic pci stuff */
160 #include <asm-generic/pci.h>
162 #endif /* __SPARC_PCI_H */