LXR linux/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
  24void pcibios_config_init(void);
  25
  26struct 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 */
  42extern unsigned long ia64_max_iommu_merge_mask;
  43#define PCI_DMA_BUS_IS_PHYS     (ia64_max_iommu_merge_mask == ~0UL)
  44
  45static inline void
  46pcibios_set_master (struct pci_dev *dev)
  47{
  48        /* No special bus mastering setup handling */
  49}
  50
  51static inline void
  52pcibios_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
  60static 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
  79extern 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
  82extern 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
  90struct pci_window {
  91        struct resource resource;
  92        u64 offset;
  93};
  94
  95struct 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
 110extern struct pci_ops pci_root_ops;
 111
 112static inline int pci_proc_domain(struct pci_bus *bus)
 113{
 114        return (pci_domain_nr(bus) != 0);
 115}
 116
 117extern void pcibios_resource_to_bus(struct pci_dev *dev,
 118                struct pci_bus_region *region, struct resource *res);
 119
 120extern void pcibios_bus_to_resource(struct pci_dev *dev,
 121                struct resource *res, struct pci_bus_region *region);
 122
 123static inline struct resource *
 124pcibios_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
 137static 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_INTEL_IOMMU
 143extern void pci_iommu_alloc(void);
 144#endif
 145#endif /* _ASM_IA64_PCI_H */
 146