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
  36         unsigned int index;
  37         /* For compatibility with current (as of July 2003) pciutils
  38            and XFree86. Eventually will be removed. */
  39         unsigned int need_domain_info;
  40
  41         int iommu;
  42
  43         /* Optional access methods for reading/writing the bus number
  44            of the PCI controller */
  45         int (*get_busno)(void);
  46         void (*set_busno)(int busno);
  47 };
  48
  49 /*
  50  * Used by boards to register their PCI busses before the actual scanning.
  51  */
  52 extern struct pci_controller * alloc_pci_controller(void);
  53 extern void register_pci_controller(struct pci_controller *hose);
  54
  55 /*
  56  * board supplied pci irq fixup routine
  57  */
  58 extern int pcibios_map_irq(struct pci_dev *dev, u8 slot, u8 pin);
  59
  60
  61 /* Can be used to override the logic in pci_scan_bus for skipping
  62    already-configured bus numbers - to be used for buggy BIOSes
  63    or architectures with incomplete PCI setup by the loader */
  64
  65 extern unsigned int pcibios_assign_all_busses(void);
  66
  67 #define pcibios_scan_all_fns(a, b)      0
  68
  69 extern unsigned long PCIBIOS_MIN_IO;
  70 extern unsigned long PCIBIOS_MIN_MEM;
  71
  72 #define PCIBIOS_MIN_CARDBUS_IO  0x4000
  73
  74 extern void pcibios_set_master(struct pci_dev *dev);
  75
  76 static inline void pcibios_penalize_isa_irq(int irq, int active)
  77 {
  78         /* We don't do dynamic PCI IRQ allocation */
  79 }
  80
  81 /*
  82  * Dynamic DMA mapping stuff.
  83  * MIPS has everything mapped statically.
  84  */
  85
  86 #include <linux/types.h>
  87 #include <linux/slab.h>
  88 #include <asm/scatterlist.h>
  89 #include <linux/string.h>
  90 #include <asm/io.h>
  91
  92 struct pci_dev;
  93
  94 /*
  95  * The PCI address space does equal the physical memory address space.  The
  96  * networking and block device layers use this boolean for bounce buffer
  97  * decisions.  This is set if any hose does not have an IOMMU.
  98  */
  99 extern unsigned int PCI_DMA_BUS_IS_PHYS;
 100
 101 #ifdef CONFIG_DMA_NEED_PCI_MAP_STATE
 102
 103 /* pci_unmap_{single,page} is not a nop, thus... */
 104 #define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME)       dma_addr_t ADDR_NAME;
 105 #define DECLARE_PCI_UNMAP_LEN(LEN_NAME)         __u32 LEN_NAME;
 106 #define pci_unmap_addr(PTR, ADDR_NAME)          ((PTR)->ADDR_NAME)
 107 #define pci_unmap_addr_set(PTR, ADDR_NAME, VAL) (((PTR)->ADDR_NAME) = (VAL))
 108 #define pci_unmap_len(PTR, LEN_NAME)            ((PTR)->LEN_NAME)
 109 #define pci_unmap_len_set(PTR, LEN_NAME, VAL)   (((PTR)->LEN_NAME) = (VAL))
 110
 111 #else /* CONFIG_DMA_NEED_PCI_MAP_STATE  */
 112
 113 /* pci_unmap_{page,single} is a nop so... */
 114 #define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME)
 115 #define DECLARE_PCI_UNMAP_LEN(LEN_NAME)
 116 #define pci_unmap_addr(PTR, ADDR_NAME)          (0)
 117 #define pci_unmap_addr_set(PTR, ADDR_NAME, VAL) do { } while (0)
 118 #define pci_unmap_len(PTR, LEN_NAME)            (0)
 119 #define pci_unmap_len_set(PTR, LEN_NAME, VAL)   do { } while (0)
 120
 121 #endif /* CONFIG_DMA_NEED_PCI_MAP_STATE  */
 122
 123 /* This is always fine. */
 124 #define pci_dac_dma_supported(pci_dev, mask)    (1)
 125
 126 extern dma64_addr_t pci_dac_page_to_dma(struct pci_dev *pdev,
 127         struct page *page, unsigned long offset, int direction);
 128 extern struct page *pci_dac_dma_to_page(struct pci_dev *pdev,
 129         dma64_addr_t dma_addr);
 130 extern unsigned long pci_dac_dma_to_offset(struct pci_dev *pdev,
 131         dma64_addr_t dma_addr);
 132 extern void pci_dac_dma_sync_single_for_cpu(struct pci_dev *pdev,
 133         dma64_addr_t dma_addr, size_t len, int direction);
 134 extern void pci_dac_dma_sync_single_for_device(struct pci_dev *pdev,
 135         dma64_addr_t dma_addr, size_t len, int direction);
 136
 137 #ifdef CONFIG_PCI
 138 static inline void pci_dma_burst_advice(struct pci_dev *pdev,
 139                                         enum pci_dma_burst_strategy *strat,
 140                                         unsigned long *strategy_parameter)
 141 {
 142         *strat = PCI_DMA_BURST_INFINITY;
 143         *strategy_parameter = ~0UL;
 144 }
 145 #endif
 146
 147 extern void pcibios_resource_to_bus(struct pci_dev *dev,
 148         struct pci_bus_region *region, struct resource *res);
 149
 150 extern void pcibios_bus_to_resource(struct pci_dev *dev, struct resource *res,
 151                                     struct pci_bus_region *region);
 152
 153 static inline struct resource *
 154 pcibios_select_root(struct pci_dev *pdev, struct resource *res)
 155 {
 156         struct resource *root = NULL;
 157
 158         if (res->flags & IORESOURCE_IO)
 159                 root = &ioport_resource;
 160         if (res->flags & IORESOURCE_MEM)
 161                 root = &iomem_resource;
 162
 163         return root;
 164 }
 165
 166 #ifdef CONFIG_PCI_DOMAINS
 167
 168 #define pci_domain_nr(bus) ((struct pci_controller *)(bus)->sysdata)->index
 169
 170 static inline int pci_proc_domain(struct pci_bus *bus)
 171 {
 172         struct pci_controller *hose = bus->sysdata;
 173         return hose->need_domain_info;
 174 }
 175
 176 #endif /* CONFIG_PCI_DOMAINS */
 177
 178 #endif /* __KERNEL__ */
 179
 180 /* implement the pci_ DMA API in terms of the generic device dma_ one */
 181 #include <asm-generic/pci-dma-compat.h>
 182
 183 static inline void pcibios_add_platform_entries(struct pci_dev *dev)
 184 {
 185 }
 186
 187 /* Do platform specific device initialization at pci_enable_device() time */
 188 extern int pcibios_plat_dev_init(struct pci_dev *dev);
 189
 190 #endif /* _ASM_PCI_H */