direct-io.hg

view linux-2.6-xen-sparse/include/asm-i386/mach-xen/asm/pci.h @ 14362:8cd8e9e4e1ad

linux: No need to force pcibios_scan_all_fns() on modern Xen.
Signed-off-by: Keir Fraser <keir@xensource.com>
author kfraser@localhost.localdomain
date Tue Mar 13 13:28:26 2007 +0000 (2007-03-13)
parents 3adf00179a63
children
line source
1 #ifndef __i386_PCI_H
2 #define __i386_PCI_H
5 #ifdef __KERNEL__
6 #include <linux/mm.h> /* for struct page */
8 /* Can be used to override the logic in pci_scan_bus for skipping
9 already-configured bus numbers - to be used for buggy BIOSes
10 or architectures with incomplete PCI setup by the loader */
12 #ifdef CONFIG_PCI
13 extern unsigned int pcibios_assign_all_busses(void);
14 #else
15 #define pcibios_assign_all_busses() 0
16 #endif
17 #define pcibios_scan_all_fns(a, b) 0
19 extern unsigned long pci_mem_start;
20 #define PCIBIOS_MIN_IO 0x1000
21 #define PCIBIOS_MIN_MEM (pci_mem_start)
23 #define PCIBIOS_MIN_CARDBUS_IO 0x4000
25 void pcibios_config_init(void);
26 struct pci_bus * pcibios_scan_root(int bus);
28 void pcibios_set_master(struct pci_dev *dev);
29 void pcibios_penalize_isa_irq(int irq, int active);
30 struct irq_routing_table *pcibios_get_irq_routing_table(void);
31 int pcibios_set_irq_routing(struct pci_dev *dev, int pin, int irq);
33 /* Dynamic DMA mapping stuff.
34 * i386 has everything mapped statically.
35 */
37 #include <linux/types.h>
38 #include <linux/slab.h>
39 #include <asm/scatterlist.h>
40 #include <linux/string.h>
41 #include <asm/io.h>
43 struct pci_dev;
45 #ifdef CONFIG_SWIOTLB
48 /* On Xen we use SWIOTLB instead of blk-specific bounce buffers. */
49 #define PCI_DMA_BUS_IS_PHYS (0)
51 #define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME) \
52 dma_addr_t ADDR_NAME;
53 #define DECLARE_PCI_UNMAP_LEN(LEN_NAME) \
54 __u32 LEN_NAME;
55 #define pci_unmap_addr(PTR, ADDR_NAME) \
56 ((PTR)->ADDR_NAME)
57 #define pci_unmap_addr_set(PTR, ADDR_NAME, VAL) \
58 (((PTR)->ADDR_NAME) = (VAL))
59 #define pci_unmap_len(PTR, LEN_NAME) \
60 ((PTR)->LEN_NAME)
61 #define pci_unmap_len_set(PTR, LEN_NAME, VAL) \
62 (((PTR)->LEN_NAME) = (VAL))
64 #else
66 /* The PCI address space does equal the physical memory
67 * address space. The networking and block device layers use
68 * this boolean for bounce buffer decisions.
69 */
70 #define PCI_DMA_BUS_IS_PHYS (1)
72 /* pci_unmap_{page,single} is a nop so... */
73 #define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME)
74 #define DECLARE_PCI_UNMAP_LEN(LEN_NAME)
75 #define pci_unmap_addr(PTR, ADDR_NAME) (0)
76 #define pci_unmap_addr_set(PTR, ADDR_NAME, VAL) do { } while (0)
77 #define pci_unmap_len(PTR, LEN_NAME) (0)
78 #define pci_unmap_len_set(PTR, LEN_NAME, VAL) do { } while (0)
80 #endif
82 /* This is always fine. */
83 #define pci_dac_dma_supported(pci_dev, mask) (1)
85 static inline dma64_addr_t
86 pci_dac_page_to_dma(struct pci_dev *pdev, struct page *page, unsigned long offset, int direction)
87 {
88 return ((dma64_addr_t) page_to_phys(page) +
89 (dma64_addr_t) offset);
90 }
92 static inline struct page *
93 pci_dac_dma_to_page(struct pci_dev *pdev, dma64_addr_t dma_addr)
94 {
95 return pfn_to_page(dma_addr >> PAGE_SHIFT);
96 }
98 static inline unsigned long
99 pci_dac_dma_to_offset(struct pci_dev *pdev, dma64_addr_t dma_addr)
100 {
101 return (dma_addr & ~PAGE_MASK);
102 }
104 static inline void
105 pci_dac_dma_sync_single_for_cpu(struct pci_dev *pdev, dma64_addr_t dma_addr, size_t len, int direction)
106 {
107 }
109 static inline void
110 pci_dac_dma_sync_single_for_device(struct pci_dev *pdev, dma64_addr_t dma_addr, size_t len, int direction)
111 {
112 flush_write_buffers();
113 }
115 #define HAVE_PCI_MMAP
116 extern int pci_mmap_page_range(struct pci_dev *dev, struct vm_area_struct *vma,
117 enum pci_mmap_state mmap_state, int write_combine);
120 static inline void pcibios_add_platform_entries(struct pci_dev *dev)
121 {
122 }
124 #ifdef CONFIG_PCI
125 static 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
134 #endif /* __KERNEL__ */
136 #ifdef CONFIG_XEN_PCIDEV_FRONTEND
137 #include <xen/pcifront.h>
138 #endif /* CONFIG_XEN_PCIDEV_FRONTEND */
140 /* implement the pci_ DMA API in terms of the generic device dma_ one */
141 #include <asm-generic/pci-dma-compat.h>
143 /* generic pci stuff */
144 #include <asm-generic/pci.h>
146 #endif /* __i386_PCI_H */