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