include/asm-x86_64/pci.h

   1 #ifndef __x8664_PCI_H
   2 #define __x8664_PCI_H
   3
   4 #include <linux/config.h>
   5 #include <asm/io.h>
   6
   7 #ifdef __KERNEL__
   8
   9 #include <linux/mm.h> /* for struct page */
  10
  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 */
  14
  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
  21
  22 extern int no_iommu, force_iommu;
  23
  24 extern unsigned long pci_mem_start;
  25 #define PCIBIOS_MIN_IO          0x1000
  26 #define PCIBIOS_MIN_MEM         (pci_mem_start)
  27
  28 #define PCIBIOS_MIN_CARDBUS_IO  0x4000
  29
  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);
  34
  35 void pcibios_set_master(struct pci_dev *dev);
  36 void pcibios_penalize_isa_irq(int irq, int active);
  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);
  39
  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>
  45
  46 extern int iommu_setup(char *opt);
  47
  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 x86-64 it mostly equals, but we set it to zero to tell some subsystems
  54  * that an hard or soft IOMMU is available.
  55  */
  56 #define PCI_DMA_BUS_IS_PHYS 0
  57
  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)
  65
  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))
  78
  79 #else
  80 /* No IOMMU */
  81
  82 #define PCI_DMA_BUS_IS_PHYS     1
  83 #define pci_dac_dma_supported(pci_dev, mask)    1
  84
  85 #define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME)
  86 #define DECLARE_PCI_UNMAP_LEN(LEN_NAME)
  87 #define pci_unmap_addr(PTR, ADDR_NAME)          (0)
  88 #define pci_unmap_addr_set(PTR, ADDR_NAME, VAL) do { } while (0)
  89 #define pci_unmap_len(PTR, LEN_NAME)            (0)
  90 #define pci_unmap_len_set(PTR, LEN_NAME, VAL)   do { } while (0)
  91
  92 #endif
  93
  94 #include <asm-generic/pci-dma-compat.h>
  95
  96 static inline dma64_addr_t
  97 pci_dac_page_to_dma(struct pci_dev *pdev, struct page *page, unsigned long offset, int direction)
  98 {
  99         return ((dma64_addr_t) page_to_phys(page) +
 100                 (dma64_addr_t) offset);
 101 }
 102
 103 static inline struct page *
 104 pci_dac_dma_to_page(struct pci_dev *pdev, dma64_addr_t dma_addr)
 105 {
 106         return virt_to_page(__va(dma_addr));
 107 }
 108
 109 static inline unsigned long
 110 pci_dac_dma_to_offset(struct pci_dev *pdev, dma64_addr_t dma_addr)
 111 {
 112         return (dma_addr & ~PAGE_MASK);
 113 }
 114
 115 static inline void
 116 pci_dac_dma_sync_single_for_cpu(struct pci_dev *pdev, dma64_addr_t dma_addr, size_t len, int direction)
 117 {
 118 }
 119
 120 static inline void
 121 pci_dac_dma_sync_single_for_device(struct pci_dev *pdev, dma64_addr_t dma_addr, size_t len, int direction)
 122 {
 123         flush_write_buffers();
 124 }
 125
 126 #ifdef CONFIG_PCI
 127 static inline void pci_dma_burst_advice(struct pci_dev *pdev,
 128                                         enum pci_dma_burst_strategy *strat,
 129                                         unsigned long *strategy_parameter)
 130 {
 131         *strat = PCI_DMA_BURST_INFINITY;
 132         *strategy_parameter = ~0UL;
 133 }
 134 #endif
 135
 136 #define HAVE_PCI_MMAP
 137 extern int pci_mmap_page_range(struct pci_dev *dev, struct vm_area_struct *vma,
 138                                enum pci_mmap_state mmap_state, int write_combine);
 139
 140 static inline void pcibios_add_platform_entries(struct pci_dev *dev)
 141 {
 142 }
 143
 144 #endif /* __KERNEL__ */
 145
 146 /* generic pci stuff */
 147 #ifdef CONFIG_PCI
 148 #include <asm-generic/pci.h>
 149 #endif
 150
 151 #endif /* __x8664_PCI_H */