ia64/xen-unstable

view linux-2.6-xen-sparse/include/asm-xen/asm-x86_64/pci.h @ 6538:84ee014ebd41

Merge xen-vtx-unstable.hg
author adsharma@los-vmm.sc.intel.com
date Wed Aug 17 12:34:38 2005 -0800 (2005-08-17)
parents 23979fb12c49 3d187585c141
children 99914b54f7bf
line source
1 #ifndef __x8664_PCI_H
2 #define __x8664_PCI_H
4 #include <linux/config.h>
5 #include <asm/io.h>
7 #ifdef __KERNEL__
9 #include <linux/mm.h> /* for struct page */
11 /* Can be used to override the logic in pci_scan_bus for skipping
12 already-configured bus numbers - to be used for buggy BIOSes
13 or architectures with incomplete PCI setup by the loader */
15 #ifdef CONFIG_PCI
16 extern unsigned int pcibios_assign_all_busses(void);
17 #else
18 #define pcibios_assign_all_busses() 0
19 #endif
20 #define pcibios_scan_all_fns(a, b) 0
22 extern int no_iommu, force_iommu;
24 extern unsigned long pci_mem_start;
25 #define PCIBIOS_MIN_IO 0x1000
26 #define PCIBIOS_MIN_MEM (pci_mem_start)
28 #define PCIBIOS_MIN_CARDBUS_IO 0x4000
30 void pcibios_config_init(void);
31 struct pci_bus * pcibios_scan_root(int bus);
32 extern int (*pci_config_read)(int seg, int bus, int dev, int fn, int reg, int len, u32 *value);
33 extern int (*pci_config_write)(int seg, int bus, int dev, int fn, int reg, int len, u32 value);
35 void pcibios_set_master(struct pci_dev *dev);
36 void pcibios_penalize_isa_irq(int irq);
37 struct irq_routing_table *pcibios_get_irq_routing_table(void);
38 int pcibios_set_irq_routing(struct pci_dev *dev, int pin, int irq);
40 #include <linux/types.h>
41 #include <linux/slab.h>
42 #include <asm/scatterlist.h>
43 #include <linux/string.h>
44 #include <asm/page.h>
46 extern int iommu_setup(char *opt);
48 #ifdef CONFIG_GART_IOMMU
49 /* The PCI address space does equal the physical memory
50 * address space. The networking and block device layers use
51 * this boolean for bounce buffer decisions
52 *
53 * On AMD64 it mostly equals, but we set it to zero to tell some subsystems
54 * that an IOMMU is available.
55 */
56 #define PCI_DMA_BUS_IS_PHYS (no_iommu ? 1 : 0)
58 /*
59 * x86-64 always supports DAC, but sometimes it is useful to force
60 * devices through the IOMMU to get automatic sg list merging.
61 * Optional right now.
62 */
63 extern int iommu_sac_force;
64 #define pci_dac_dma_supported(pci_dev, mask) (!iommu_sac_force)
66 #define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME) \
67 dma_addr_t ADDR_NAME;
68 #define DECLARE_PCI_UNMAP_LEN(LEN_NAME) \
69 __u32 LEN_NAME;
70 #define pci_unmap_addr(PTR, ADDR_NAME) \
71 ((PTR)->ADDR_NAME)
72 #define pci_unmap_addr_set(PTR, ADDR_NAME, VAL) \
73 (((PTR)->ADDR_NAME) = (VAL))
74 #define pci_unmap_len(PTR, LEN_NAME) \
75 ((PTR)->LEN_NAME)
76 #define pci_unmap_len_set(PTR, LEN_NAME, VAL) \
77 (((PTR)->LEN_NAME) = (VAL))
79 #else
80 /* No IOMMU */
82 /* On Xen we use SWIOTLB instead of blk-specific bounce buffers. */
83 #define PCI_DMA_BUS_IS_PHYS (0)
85 #define pci_dac_dma_supported(pci_dev, mask) 1
87 #define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME)
88 #define DECLARE_PCI_UNMAP_LEN(LEN_NAME)
89 #define pci_unmap_addr(PTR, ADDR_NAME) (0)
90 #define pci_unmap_addr_set(PTR, ADDR_NAME, VAL) do { } while (0)
91 #define pci_unmap_len(PTR, LEN_NAME) (0)
92 #define pci_unmap_len_set(PTR, LEN_NAME, VAL) do { } while (0)
94 #endif
96 #include <asm-generic/pci-dma-compat.h>
98 static inline dma64_addr_t
99 pci_dac_page_to_dma(struct pci_dev *pdev, struct page *page, unsigned long offset, int direction)
100 {
101 return ((dma64_addr_t) page_to_phys(page) +
102 (dma64_addr_t) offset);
103 }
105 static inline struct page *
106 pci_dac_dma_to_page(struct pci_dev *pdev, dma64_addr_t dma_addr)
107 {
108 return virt_to_page(__va(dma_addr));
109 }
111 static inline unsigned long
112 pci_dac_dma_to_offset(struct pci_dev *pdev, dma64_addr_t dma_addr)
113 {
114 return (dma_addr & ~PAGE_MASK);
115 }
117 static inline void
118 pci_dac_dma_sync_single_for_cpu(struct pci_dev *pdev, dma64_addr_t dma_addr, size_t len, int direction)
119 {
120 }
122 static inline void
123 pci_dac_dma_sync_single_for_device(struct pci_dev *pdev, dma64_addr_t dma_addr, size_t len, int direction)
124 {
125 flush_write_buffers();
126 }
128 #define HAVE_PCI_MMAP
129 extern int pci_mmap_page_range(struct pci_dev *dev, struct vm_area_struct *vma,
130 enum pci_mmap_state mmap_state, int write_combine);
132 static inline void pcibios_add_platform_entries(struct pci_dev *dev)
133 {
134 }
136 #endif /* __KERNEL__ */
138 /* generic pci stuff */
139 #ifdef CONFIG_PCI
140 #include <asm-generic/pci.h>
141 #endif
143 /* On Xen we have to scan all functions since Xen hides bridges from
144 * us. If a bridge is at fn=0 and that slot has a multifunction
145 * device, we won't find the additional devices without scanning all
146 * functions. */
147 #undef pcibios_scan_all_fns
148 #define pcibios_scan_all_fns(a, b) 1
150 #endif /* __x8664_PCI_H */