fs: use kmem_cache_zalloc instead
[pv_ops_mirror.git] / include / asm-sparc / pci.h
blobb93b6c79e08f6d48692f1539ced9fb7dbfeb8629
1 #ifndef __SPARC_PCI_H
2 #define __SPARC_PCI_H
4 #ifdef __KERNEL__
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
13 #define PCIBIOS_MIN_IO 0UL
14 #define PCIBIOS_MIN_MEM 0UL
16 #define PCI_IRQ_NONE 0xffffffff
18 static inline void pcibios_set_master(struct pci_dev *dev)
20 /* No special bus mastering setup handling */
23 static inline void pcibios_penalize_isa_irq(int irq, int active)
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>
34 struct pci_dev;
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) \
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))
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 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).
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.
102 * Device ownership issues as mentioned above for pci_map_single are
103 * the same here.
105 extern int pci_map_sg(struct pci_dev *hwdev, struct scatterlist *sg, int nents, int direction);
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.
111 extern void pci_unmap_sg(struct pci_dev *hwdev, struct scatterlist *sg, int nhwents, int direction);
113 /* Make physical memory consistent for a single
114 * streaming mode DMA translation after a transfer.
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.
123 extern void pci_dma_sync_single_for_cpu(struct pci_dev *hwdev, dma_addr_t dma_handle, size_t size, int direction);
124 extern void pci_dma_sync_single_for_device(struct pci_dev *hwdev, dma_addr_t dma_handle, size_t size, int direction);
126 /* Make physical memory consistent for a set of streaming
127 * mode DMA translations after a transfer.
129 * The same as pci_dma_sync_single_* but for a scatter-gather list,
130 * same rules and usage.
132 extern void pci_dma_sync_sg_for_cpu(struct pci_dev *hwdev, struct scatterlist *sg, int nelems, int direction);
133 extern void pci_dma_sync_sg_for_device(struct pci_dev *hwdev, struct scatterlist *sg, int nelems, int direction);
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.
140 static inline int pci_dma_supported(struct pci_dev *hwdev, u64 mask)
142 return 1;
145 #ifdef CONFIG_PCI
146 static inline void pci_dma_burst_advice(struct pci_dev *pdev,
147 enum pci_dma_burst_strategy *strat,
148 unsigned long *strategy_parameter)
150 *strat = PCI_DMA_BURST_INFINITY;
151 *strategy_parameter = ~0UL;
153 #endif
155 #define PCI_DMA_ERROR_CODE (~(dma_addr_t)0x0)
157 static inline int pci_dma_mapping_error(dma_addr_t dma_addr)
159 return (dma_addr == PCI_DMA_ERROR_CODE);
162 struct device_node;
163 extern struct device_node *pci_device_to_OF_node(struct pci_dev *pdev);
165 #endif /* __KERNEL__ */
167 /* generic pci stuff */
168 #include <asm-generic/pci.h>
170 #endif /* __SPARC_PCI_H */