include/asm-ia64/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
  13 /*
  14  * Can be used to override the logic in pci_scan_bus for skipping already-configured bus
  15  * numbers - to be used for buggy BIOSes or architectures with incomplete PCI setup by the
  16  * loader.
  17  */
  18 #define pcibios_assign_all_busses()     0
  19 #define pcibios_scan_all_fns(a, b)      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 correspondence
  30  * between device bus addresses and CPU physical addresses.  Platforms with a hardware I/O
  31  * MMU _must_ turn this off to suppress the bounce buffer handling code in the block and
  32  * network device layers.  Platforms with separate bus address spaces _must_ turn this off
  33  * and provide a device DMA mapping implementation that takes care of the necessary
  34  * address translation.
  35  *
  36  * For now, the ia64 platforms which may have separate/multiple bus address spaces all
  37  * have I/O MMUs which support the merging of physically discontiguous buffers, so we can
  38  * use that as the sole factor to determine the setting of PCI_DMA_BUS_IS_PHYS.
  39  */
  40 extern unsigned long ia64_max_iommu_merge_mask;
  41 #define PCI_DMA_BUS_IS_PHYS     (ia64_max_iommu_merge_mask == ~0UL)
  42
  43 static inline void
  44 pcibios_set_master (struct pci_dev *dev)
  45 {
  46         /* No special bus mastering setup handling */
  47 }
  48
  49 static inline void
  50 pcibios_penalize_isa_irq (int irq, int active)
  51 {
  52         /* We don't do dynamic PCI IRQ allocation */
  53 }
  54
  55 #define HAVE_ARCH_PCI_MWI 1
  56 extern int pcibios_prep_mwi (struct pci_dev *);
  57
  58 #include <asm-generic/pci-dma-compat.h>
  59
  60 /* pci_unmap_{single,page} is not a nop, thus... */
  61 #define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME)       \
  62         dma_addr_t ADDR_NAME;
  63 #define DECLARE_PCI_UNMAP_LEN(LEN_NAME)         \
  64         __u32 LEN_NAME;
  65 #define pci_unmap_addr(PTR, ADDR_NAME)                  \
  66         ((PTR)->ADDR_NAME)
  67 #define pci_unmap_addr_set(PTR, ADDR_NAME, VAL)         \
  68         (((PTR)->ADDR_NAME) = (VAL))
  69 #define pci_unmap_len(PTR, LEN_NAME)                    \
  70         ((PTR)->LEN_NAME)
  71 #define pci_unmap_len_set(PTR, LEN_NAME, VAL)           \
  72         (((PTR)->LEN_NAME) = (VAL))
  73
  74 /* The ia64 platform always supports 64-bit addressing. */
  75 #define pci_dac_dma_supported(pci_dev, mask)            (1)
  76 #define pci_dac_page_to_dma(dev,pg,off,dir)             ((dma_addr_t) page_to_bus(pg) + (off))
  77 #define pci_dac_dma_to_page(dev,dma_addr)               (virt_to_page(bus_to_virt(dma_addr)))
  78 #define pci_dac_dma_to_offset(dev,dma_addr)             offset_in_page(dma_addr)
  79 #define pci_dac_dma_sync_single_for_cpu(dev,dma_addr,len,dir)   do { } while (0)
  80 #define pci_dac_dma_sync_single_for_device(dev,dma_addr,len,dir)        do { mb(); } while (0)
  81
  82 #define sg_dma_len(sg)          ((sg)->dma_length)
  83 #define sg_dma_address(sg)      ((sg)->dma_address)
  84
  85 #ifdef CONFIG_PCI
  86 static inline void pci_dma_burst_advice(struct pci_dev *pdev,
  87                                         enum pci_dma_burst_strategy *strat,
  88                                         unsigned long *strategy_parameter)
  89 {
  90         unsigned long cacheline_size;
  91         u8 byte;
  92
  93         pci_read_config_byte(pdev, PCI_CACHE_LINE_SIZE, &byte);
  94         if (byte == 0)
  95                 cacheline_size = 1024;
  96         else
  97                 cacheline_size = (int) byte * 4;
  98
  99         *strat = PCI_DMA_BURST_MULTIPLE;
 100         *strategy_parameter = cacheline_size;
 101 }
 102 #endif
 103
 104 #define HAVE_PCI_MMAP
 105 extern int pci_mmap_page_range (struct pci_dev *dev, struct vm_area_struct *vma,
 106                                 enum pci_mmap_state mmap_state, int write_combine);
 107 #define HAVE_PCI_LEGACY
 108 extern int pci_mmap_legacy_page_range(struct pci_bus *bus,
 109                                       struct vm_area_struct *vma);
 110 extern ssize_t pci_read_legacy_io(struct kobject *kobj, char *buf, loff_t off,
 111                                   size_t count);
 112 extern ssize_t pci_write_legacy_io(struct kobject *kobj, char *buf, loff_t off,
 113                                    size_t count);
 114 extern int pci_mmap_legacy_mem(struct kobject *kobj,
 115                                struct bin_attribute *attr,
 116                                struct vm_area_struct *vma);
 117
 118 #define pci_get_legacy_mem platform_pci_get_legacy_mem
 119 #define pci_legacy_read platform_pci_legacy_read
 120 #define pci_legacy_write platform_pci_legacy_write
 121
 122 struct pci_window {
 123         struct resource resource;
 124         u64 offset;
 125 };
 126
 127 struct pci_controller {
 128         void *acpi_handle;
 129         void *iommu;
 130         int segment;
 131         int node;               /* nearest node with memory or -1 for global allocation */
 132
 133         unsigned int windows;
 134         struct pci_window *window;
 135
 136         void *platform_data;
 137 };
 138
 139 #define PCI_CONTROLLER(busdev) ((struct pci_controller *) busdev->sysdata)
 140 #define pci_domain_nr(busdev)    (PCI_CONTROLLER(busdev)->segment)
 141
 142 extern struct pci_ops pci_root_ops;
 143
 144 static inline int pci_proc_domain(struct pci_bus *bus)
 145 {
 146         return (pci_domain_nr(bus) != 0);
 147 }
 148
 149 static inline void pcibios_add_platform_entries(struct pci_dev *dev)
 150 {
 151 }
 152
 153 extern void pcibios_resource_to_bus(struct pci_dev *dev,
 154                 struct pci_bus_region *region, struct resource *res);
 155
 156 extern void pcibios_bus_to_resource(struct pci_dev *dev,
 157                 struct resource *res, struct pci_bus_region *region);
 158
 159 static inline struct resource *
 160 pcibios_select_root(struct pci_dev *pdev, struct resource *res)
 161 {
 162         struct resource *root = NULL;
 163
 164         if (res->flags & IORESOURCE_IO)
 165                 root = &ioport_resource;
 166         if (res->flags & IORESOURCE_MEM)
 167                 root = &iomem_resource;
 168
 169         return root;
 170 }
 171
 172 #define pcibios_scan_all_fns(a, b)      0
 173
 174 #endif /* _ASM_IA64_PCI_H */