1#ifndef __x8664_PCI_H
2#define __x8664_PCI_H
3
4#include <asm/io.h>
5
6#ifdef __KERNEL__
7
8#include <linux/mm.h> /* for struct page */
9
10/* Can be used to override the logic in pci_scan_bus for skipping
11   already-configured bus numbers - to be used for buggy BIOSes
12   or architectures with incomplete PCI setup by the loader */
13
14#ifdef CONFIG_PCI
15extern unsigned int pcibios_assign_all_busses(void);
16#else
17#define pcibios_assign_all_busses()	0
18#endif
19#define pcibios_scan_all_fns(a, b)	0
20
21extern unsigned long pci_mem_start;
22#define PCIBIOS_MIN_IO		0x1000
23#define PCIBIOS_MIN_MEM		(pci_mem_start)
24
25#define PCIBIOS_MIN_CARDBUS_IO	0x4000
26
27void pcibios_config_init(void);
28struct pci_bus * pcibios_scan_root(int bus);
29extern int (*pci_config_read)(int seg, int bus, int dev, int fn, int reg, int len, u32 *value);
30extern int (*pci_config_write)(int seg, int bus, int dev, int fn, int reg, int len, u32 value);
31
32void pcibios_set_master(struct pci_dev *dev);
33void pcibios_penalize_isa_irq(int irq, int active);
34struct irq_routing_table *pcibios_get_irq_routing_table(void);
35int pcibios_set_irq_routing(struct pci_dev *dev, int pin, int irq);
36
37#include <linux/types.h>
38#include <linux/slab.h>
39#include <asm/scatterlist.h>
40#include <linux/string.h>
41#include <asm/page.h>
42
43extern void pci_iommu_alloc(void);
44extern int iommu_setup(char *opt);
45
46/* The PCI address space does equal the physical memory
47 * address space.  The networking and block device layers use
48 * this boolean for bounce buffer decisions
49 *
50 * On AMD64 it mostly equals, but we set it to zero if a hardware
51 * IOMMU (gart) of sotware IOMMU (swiotlb) is available.
52 */
53#define PCI_DMA_BUS_IS_PHYS (dma_ops->is_phys)
54
55#if defined(CONFIG_IOMMU) || defined(CONFIG_CALGARY_IOMMU)
56
57/*
58 * x86-64 always supports DAC, but sometimes it is useful to force
59 * devices through the IOMMU to get automatic sg list merging.
60 * Optional right now.
61 */
62extern int iommu_sac_force;
63#define pci_dac_dma_supported(pci_dev, mask)	(!iommu_sac_force)
64
65#define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME)	\
66	dma_addr_t ADDR_NAME;
67#define DECLARE_PCI_UNMAP_LEN(LEN_NAME)		\
68	__u32 LEN_NAME;
69#define pci_unmap_addr(PTR, ADDR_NAME)			\
70	((PTR)->ADDR_NAME)
71#define pci_unmap_addr_set(PTR, ADDR_NAME, VAL)		\
72	(((PTR)->ADDR_NAME) = (VAL))
73#define pci_unmap_len(PTR, LEN_NAME)			\
74	((PTR)->LEN_NAME)
75#define pci_unmap_len_set(PTR, LEN_NAME, VAL)		\
76	(((PTR)->LEN_NAME) = (VAL))
77
78#else
79/* No IOMMU */
80
81#define pci_dac_dma_supported(pci_dev, mask)    1
82
83#define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME)
84#define DECLARE_PCI_UNMAP_LEN(LEN_NAME)
85#define pci_unmap_addr(PTR, ADDR_NAME)		(0)
86#define pci_unmap_addr_set(PTR, ADDR_NAME, VAL)	do { } while (0)
87#define pci_unmap_len(PTR, LEN_NAME)		(0)
88#define pci_unmap_len_set(PTR, LEN_NAME, VAL)	do { } while (0)
89
90#endif
91
92#include <asm-generic/pci-dma-compat.h>
93
94static inline dma64_addr_t
95pci_dac_page_to_dma(struct pci_dev *pdev, struct page *page, unsigned long offset, int direction)
96{
97	return ((dma64_addr_t) page_to_phys(page) +
98		(dma64_addr_t) offset);
99}
100
101static inline struct page *
102pci_dac_dma_to_page(struct pci_dev *pdev, dma64_addr_t dma_addr)
103{
104	return virt_to_page(__va(dma_addr));
105}
106
107static inline unsigned long
108pci_dac_dma_to_offset(struct pci_dev *pdev, dma64_addr_t dma_addr)
109{
110	return (dma_addr & ~PAGE_MASK);
111}
112
113static inline void
114pci_dac_dma_sync_single_for_cpu(struct pci_dev *pdev, dma64_addr_t dma_addr, size_t len, int direction)
115{
116}
117
118static inline void
119pci_dac_dma_sync_single_for_device(struct pci_dev *pdev, dma64_addr_t dma_addr, size_t len, int direction)
120{
121	flush_write_buffers();
122}
123
124#ifdef CONFIG_PCI
125static inline void pci_dma_burst_advice(struct pci_dev *pdev,
126					enum pci_dma_burst_strategy *strat,
127					unsigned long *strategy_parameter)
128{
129	*strat = PCI_DMA_BURST_INFINITY;
130	*strategy_parameter = ~0UL;
131}
132#endif
133
134#define HAVE_PCI_MMAP
135extern int pci_mmap_page_range(struct pci_dev *dev, struct vm_area_struct *vma,
136			       enum pci_mmap_state mmap_state, int write_combine);
137
138static inline void pcibios_add_platform_entries(struct pci_dev *dev)
139{
140}
141
142#endif /* __KERNEL__ */
143
144/* generic pci stuff */
145#ifdef CONFIG_PCI
146#include <asm-generic/pci.h>
147#endif
148
149#endif /* __x8664_PCI_H */
150