arch/mips/include/asm/pci.h

   1 /*
   2  * This file is subject to the terms and conditions of the GNU General Public
   3  * License.  See the file "COPYING" in the main directory of this archive
   4  * for more details.
   5  */
   6 #ifndef _ASM_PCI_H
   7 #define _ASM_PCI_H
   8
   9 #include <linux/mm.h>
  10
  11 #ifdef __KERNEL__
  12
  13 /*
  14  * This file essentially defines the interface between board
  15  * specific PCI code and MIPS common PCI code.  Should potentially put
  16  * into include/asm/pci.h file.
  17  */
  18
  19 #include <linux/ioport.h>
  20
  21 /*
  22  * Each pci channel is a top-level PCI bus seem by CPU.  A machine  with
  23  * multiple PCI channels may have multiple PCI host controllers or a
  24  * single controller supporting multiple channels.
  25  */
  26 struct pci_controller {
  27         struct pci_controller *next;
  28         struct pci_bus *bus;
  29
  30         struct pci_ops *pci_ops;
  31         struct resource *mem_resource;
  32         unsigned long mem_offset;
  33         struct resource *io_resource;
  34         unsigned long io_offset;
  35         unsigned long io_map_base;
  36
  37         unsigned int index;
  38         /* For compatibility with current (as of July 2003) pciutils
  39            and XFree86. Eventually will be removed. */
  40         unsigned int need_domain_info;
  41
  42         int iommu;
  43
  44         /* Optional access methods for reading/writing the bus number
  45            of the PCI controller */
  46         int (*get_busno)(void);
  47         void (*set_busno)(int busno);
  48 };
  49
  50 /*
  51  * Used by boards to register their PCI busses before the actual scanning.
  52  */
  53 extern struct pci_controller * alloc_pci_controller(void);
  54 extern void register_pci_controller(struct pci_controller *hose);
  55
  56 /*
  57  * board supplied pci irq fixup routine
  58  */
  59 extern int pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin);
  60
  61
  62 /* Can be used to override the logic in pci_scan_bus for skipping
  63    already-configured bus numbers - to be used for buggy BIOSes
  64    or architectures with incomplete PCI setup by the loader */
  65
  66 extern unsigned int pcibios_assign_all_busses(void);
  67
  68 #define pcibios_scan_all_fns(a, b)      0
  69
  70 extern unsigned long PCIBIOS_MIN_IO;
  71 extern unsigned long PCIBIOS_MIN_MEM;
  72
  73 #define PCIBIOS_MIN_CARDBUS_IO  0x4000
  74
  75 extern void pcibios_set_master(struct pci_dev *dev);
  76
  77 static inline void pcibios_penalize_isa_irq(int irq, int active)
  78 {
  79         /* We don't do dynamic PCI IRQ allocation */
  80 }
  81
  82 #define HAVE_PCI_MMAP
  83
  84 extern int pci_mmap_page_range(struct pci_dev *dev, struct vm_area_struct *vma,
  85         enum pci_mmap_state mmap_state, int write_combine);
  86
  87 /*
  88  * Dynamic DMA mapping stuff.
  89  * MIPS has everything mapped statically.
  90  */
  91
  92 #include <linux/types.h>
  93 #include <linux/slab.h>
  94 #include <asm/scatterlist.h>
  95 #include <linux/string.h>
  96 #include <asm/io.h>
  97
  98 struct pci_dev;
  99
 100 /*
 101  * The PCI address space does equal the physical memory address space.  The
 102  * networking and block device layers use this boolean for bounce buffer
 103  * decisions.  This is set if any hose does not have an IOMMU.
 104  */
 105 extern unsigned int PCI_DMA_BUS_IS_PHYS;
 106
 107 #ifdef CONFIG_DMA_NEED_PCI_MAP_STATE
 108
 109 /* pci_unmap_{single,page} is not a nop, thus... */
 110 #define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME)       dma_addr_t ADDR_NAME;
 111 #define DECLARE_PCI_UNMAP_LEN(LEN_NAME)         __u32 LEN_NAME;
 112 #define pci_unmap_addr(PTR, ADDR_NAME)          ((PTR)->ADDR_NAME)
 113 #define pci_unmap_addr_set(PTR, ADDR_NAME, VAL) (((PTR)->ADDR_NAME) = (VAL))
 114 #define pci_unmap_len(PTR, LEN_NAME)            ((PTR)->LEN_NAME)
 115 #define pci_unmap_len_set(PTR, LEN_NAME, VAL)   (((PTR)->LEN_NAME) = (VAL))
 116
 117 #else /* CONFIG_DMA_NEED_PCI_MAP_STATE  */
 118
 119 /* pci_unmap_{page,single} is a nop so... */
 120 #define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME)
 121 #define DECLARE_PCI_UNMAP_LEN(LEN_NAME)
 122 #define pci_unmap_addr(PTR, ADDR_NAME)          (0)
 123 #define pci_unmap_addr_set(PTR, ADDR_NAME, VAL) do { } while (0)
 124 #define pci_unmap_len(PTR, LEN_NAME)            (0)
 125 #define pci_unmap_len_set(PTR, LEN_NAME, VAL)   do { } while (0)
 126
 127 #endif /* CONFIG_DMA_NEED_PCI_MAP_STATE  */
 128
 129 #ifdef CONFIG_PCI
 130 static inline void pci_dma_burst_advice(struct pci_dev *pdev,
 131                                         enum pci_dma_burst_strategy *strat,
 132                                         unsigned long *strategy_parameter)
 133 {
 134         *strat = PCI_DMA_BURST_INFINITY;
 135         *strategy_parameter = ~0UL;
 136 }
 137 #endif
 138
 139 extern void pcibios_resource_to_bus(struct pci_dev *dev,
 140         struct pci_bus_region *region, struct resource *res);
 141
 142 extern void pcibios_bus_to_resource(struct pci_dev *dev, struct resource *res,
 143                                     struct pci_bus_region *region);
 144
 145 #define pci_domain_nr(bus) ((struct pci_controller *)(bus)->sysdata)->index
 146
 147 static inline int pci_proc_domain(struct pci_bus *bus)
 148 {
 149         struct pci_controller *hose = bus->sysdata;
 150         return hose->need_domain_info;
 151 }
 152
 153 #endif /* __KERNEL__ */
 154
 155 /* implement the pci_ DMA API in terms of the generic device dma_ one */
 156 #include <asm-generic/pci-dma-compat.h>
 157
 158 /* Do platform specific device initialization at pci_enable_device() time */
 159 extern int pcibios_plat_dev_init(struct pci_dev *dev);
 160
 161 /* Chances are this interrupt is wired PC-style ...  */
 162 static inline int pci_get_legacy_ide_irq(struct pci_dev *dev, int channel)
 163 {
 164         return channel ? 15 : 14;
 165 }
 166
 167 extern int pci_probe_only;
 168
 169 extern char * (*pcibios_plat_setup)(char *str);
 170
 171 #endif /* _ASM_PCI_H */