include/asm-mips/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 /*
  83  * Dynamic DMA mapping stuff.
  84  * MIPS has everything mapped statically.
  85  */
  86
  87 #include <linux/types.h>
  88 #include <linux/slab.h>
  89 #include <asm/scatterlist.h>
  90 #include <linux/string.h>
  91 #include <asm/io.h>
  92
  93 struct pci_dev;
  94
  95 /*
  96  * The PCI address space does equal the physical memory address space.  The
  97  * networking and block device layers use this boolean for bounce buffer
  98  * decisions.  This is set if any hose does not have an IOMMU.
  99  */
 100 extern unsigned int PCI_DMA_BUS_IS_PHYS;
 101
 102 #ifdef CONFIG_DMA_NEED_PCI_MAP_STATE
 103
 104 /* pci_unmap_{single,page} is not a nop, thus... */
 105 #define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME)       dma_addr_t ADDR_NAME;
 106 #define DECLARE_PCI_UNMAP_LEN(LEN_NAME)         __u32 LEN_NAME;
 107 #define pci_unmap_addr(PTR, ADDR_NAME)          ((PTR)->ADDR_NAME)
 108 #define pci_unmap_addr_set(PTR, ADDR_NAME, VAL) (((PTR)->ADDR_NAME) = (VAL))
 109 #define pci_unmap_len(PTR, LEN_NAME)            ((PTR)->LEN_NAME)
 110 #define pci_unmap_len_set(PTR, LEN_NAME, VAL)   (((PTR)->LEN_NAME) = (VAL))
 111
 112 #else /* CONFIG_DMA_NEED_PCI_MAP_STATE  */
 113
 114 /* pci_unmap_{page,single} is a nop so... */
 115 #define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME)
 116 #define DECLARE_PCI_UNMAP_LEN(LEN_NAME)
 117 #define pci_unmap_addr(PTR, ADDR_NAME)          (0)
 118 #define pci_unmap_addr_set(PTR, ADDR_NAME, VAL) do { } while (0)
 119 #define pci_unmap_len(PTR, LEN_NAME)            (0)
 120 #define pci_unmap_len_set(PTR, LEN_NAME, VAL)   do { } while (0)
 121
 122 #endif /* CONFIG_DMA_NEED_PCI_MAP_STATE  */
 123
 124 #ifdef CONFIG_PCI
 125 static inline void pci_dma_burst_advice(struct pci_dev *pdev,
 126                                         enum pci_dma_burst_strategy *strat,
 127                                         unsigned long *strategy_parameter)
 128 {
 129         *strat = PCI_DMA_BURST_INFINITY;
 130         *strategy_parameter = ~0UL;
 131 }
 132 #endif
 133
 134 extern void pcibios_resource_to_bus(struct pci_dev *dev,
 135         struct pci_bus_region *region, struct resource *res);
 136
 137 extern void pcibios_bus_to_resource(struct pci_dev *dev, struct resource *res,
 138                                     struct pci_bus_region *region);
 139
 140 static inline struct resource *
 141 pcibios_select_root(struct pci_dev *pdev, struct resource *res)
 142 {
 143         struct resource *root = NULL;
 144
 145         if (res->flags & IORESOURCE_IO)
 146                 root = &ioport_resource;
 147         if (res->flags & IORESOURCE_MEM)
 148                 root = &iomem_resource;
 149
 150         return root;
 151 }
 152
 153 #define pci_domain_nr(bus) ((struct pci_controller *)(bus)->sysdata)->index
 154
 155 static inline int pci_proc_domain(struct pci_bus *bus)
 156 {
 157         struct pci_controller *hose = bus->sysdata;
 158         return hose->need_domain_info;
 159 }
 160
 161 #endif /* __KERNEL__ */
 162
 163 /* implement the pci_ DMA API in terms of the generic device dma_ one */
 164 #include <asm-generic/pci-dma-compat.h>
 165
 166 /* Do platform specific device initialization at pci_enable_device() time */
 167 extern int pcibios_plat_dev_init(struct pci_dev *dev);
 168
 169 /* Chances are this interrupt is wired PC-style ...  */
 170 static inline int pci_get_legacy_ide_irq(struct pci_dev *dev, int channel)
 171 {
 172         return channel ? 15 : 14;
 173 }
 174
 175 #endif /* _ASM_PCI_H */