release/src-rt-6.x.4708/linux/linux-2.6.36/arch/ia64/include/asm/pci.h

   1 #ifndef _ASM_IA64_PCI_H
   2 #define _ASM_IA64_PCI_H
   3
   4 #include <linux/mm.h>
   5 #include <linux/slab.h>
   6 #include <linux/spinlock.h>
   7 #include <linux/string.h>
   8 #include <linux/types.h>
   9
  10 #include <asm/io.h>
  11 #include <asm/scatterlist.h>
  12 #include <asm/hw_irq.h>
  13
  14 /*
  15  * Can be used to override the logic in pci_scan_bus for skipping already-configured bus
  16  * numbers - to be used for buggy BIOSes or architectures with incomplete PCI setup by the
  17  * loader.
  18  */
  19 #define pcibios_assign_all_busses()     0
  20
  21 #define PCIBIOS_MIN_IO          0x1000
  22 #define PCIBIOS_MIN_MEM         0x10000000
  23
  24 void pcibios_config_init(void);
  25
  26 struct pci_dev;
  27
  28 /*
  29  * PCI_DMA_BUS_IS_PHYS should be set to 1 if there is _necessarily_ a direct
  30  * correspondence between device bus addresses and CPU physical addresses.
  31  * Platforms with a hardware I/O MMU _must_ turn this off to suppress the
  32  * bounce buffer handling code in the block and network device layers.
  33  * Platforms with separate bus address spaces _must_ turn this off and provide
  34  * a device DMA mapping implementation that takes care of the necessary
  35  * address translation.
  36  *
  37  * For now, the ia64 platforms which may have separate/multiple bus address
  38  * spaces all have I/O MMUs which support the merging of physically
  39  * discontiguous buffers, so we can use that as the sole factor to determine
  40  * the setting of PCI_DMA_BUS_IS_PHYS.
  41  */
  42 extern unsigned long ia64_max_iommu_merge_mask;
  43 #define PCI_DMA_BUS_IS_PHYS     (ia64_max_iommu_merge_mask == ~0UL)
  44
  45 static inline void
  46 pcibios_set_master (struct pci_dev *dev)
  47 {
  48         /* No special bus mastering setup handling */
  49 }
  50
  51 static inline void
  52 pcibios_penalize_isa_irq (int irq, int active)
  53 {
  54         /* We don't do dynamic PCI IRQ allocation */
  55 }
  56
  57 #include <asm-generic/pci-dma-compat.h>
  58
  59 #ifdef CONFIG_PCI
  60 static inline void pci_dma_burst_advice(struct pci_dev *pdev,
  61                                         enum pci_dma_burst_strategy *strat,
  62                                         unsigned long *strategy_parameter)
  63 {
  64         unsigned long cacheline_size;
  65         u8 byte;
  66
  67         pci_read_config_byte(pdev, PCI_CACHE_LINE_SIZE, &byte);
  68         if (byte == 0)
  69                 cacheline_size = 1024;
  70         else
  71                 cacheline_size = (int) byte * 4;
  72
  73         *strat = PCI_DMA_BURST_MULTIPLE;
  74         *strategy_parameter = cacheline_size;
  75 }
  76 #endif
  77
  78 #define HAVE_PCI_MMAP
  79 extern int pci_mmap_page_range (struct pci_dev *dev, struct vm_area_struct *vma,
  80                                 enum pci_mmap_state mmap_state, int write_combine);
  81 #define HAVE_PCI_LEGACY
  82 extern int pci_mmap_legacy_page_range(struct pci_bus *bus,
  83                                       struct vm_area_struct *vma,
  84                                       enum pci_mmap_state mmap_state);
  85
  86 #define pci_get_legacy_mem platform_pci_get_legacy_mem
  87 #define pci_legacy_read platform_pci_legacy_read
  88 #define pci_legacy_write platform_pci_legacy_write
  89
  90 struct pci_window {
  91         struct resource resource;
  92         u64 offset;
  93 };
  94
  95 struct pci_controller {
  96         void *acpi_handle;
  97         void *iommu;
  98         int segment;
  99         int node;               /* nearest node with memory or -1 for global allocation */
 100
 101         unsigned int windows;
 102         struct pci_window *window;
 103
 104         void *platform_data;
 105 };
 106
 107 #define PCI_CONTROLLER(busdev) ((struct pci_controller *) busdev->sysdata)
 108 #define pci_domain_nr(busdev)    (PCI_CONTROLLER(busdev)->segment)
 109
 110 extern struct pci_ops pci_root_ops;
 111
 112 static inline int pci_proc_domain(struct pci_bus *bus)
 113 {
 114         return (pci_domain_nr(bus) != 0);
 115 }
 116
 117 extern void pcibios_resource_to_bus(struct pci_dev *dev,
 118                 struct pci_bus_region *region, struct resource *res);
 119
 120 extern void pcibios_bus_to_resource(struct pci_dev *dev,
 121                 struct resource *res, struct pci_bus_region *region);
 122
 123 static inline struct resource *
 124 pcibios_select_root(struct pci_dev *pdev, struct resource *res)
 125 {
 126         struct resource *root = NULL;
 127
 128         if (res->flags & IORESOURCE_IO)
 129                 root = &ioport_resource;
 130         if (res->flags & IORESOURCE_MEM)
 131                 root = &iomem_resource;
 132
 133         return root;
 134 }
 135
 136 #define HAVE_ARCH_PCI_GET_LEGACY_IDE_IRQ
 137 static inline int pci_get_legacy_ide_irq(struct pci_dev *dev, int channel)
 138 {
 139         return channel ? isa_irq_to_vector(15) : isa_irq_to_vector(14);
 140 }
 141
 142 #ifdef CONFIG_DMAR
 143 extern void pci_iommu_alloc(void);
 144 #endif
 145 #endif /* _ASM_IA64_PCI_H */