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/config.h>
  10 #include <linux/mm.h>
  11
  12 #ifdef __KERNEL__
  13
  14 /*
  15  * This file essentially defines the interface between board
  16  * specific PCI code and MIPS common PCI code.  Should potentially put
  17  * into include/asm/pci.h file.
  18  */
  19
  20 #include <linux/ioport.h>
  21
  22 /*
  23  * Each pci channel is a top-level PCI bus seem by CPU.  A machine  with
  24  * multiple PCI channels may have multiple PCI host controllers or a
  25  * single controller supporting multiple channels.
  26  */
  27 struct pci_controller {
  28         struct pci_controller *next;
  29         struct pci_bus *bus;
  30
  31         struct pci_ops *pci_ops;
  32         struct resource *mem_resource;
  33         unsigned long mem_offset;
  34         struct resource *io_resource;
  35         unsigned long io_offset;
  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
  45 /*
  46  * Used by boards to register their PCI busses before the actual scanning.
  47  */
  48 extern struct pci_controller * alloc_pci_controller(void);
  49 extern void register_pci_controller(struct pci_controller *hose);
  50
  51 /*
  52  * board supplied pci irq fixup routine
  53  */
  54 extern int pcibios_map_irq(struct pci_dev *dev, u8 slot, u8 pin);
  55
  56
  57 /* Can be used to override the logic in pci_scan_bus for skipping
  58    already-configured bus numbers - to be used for buggy BIOSes
  59    or architectures with incomplete PCI setup by the loader */
  60
  61 extern unsigned int pcibios_assign_all_busses(void);
  62
  63 #define pcibios_scan_all_fns(a, b)      0
  64
  65 extern unsigned long PCIBIOS_MIN_IO;
  66 extern unsigned long PCIBIOS_MIN_MEM;
  67
  68 #define PCIBIOS_MIN_CARDBUS_IO  0x4000
  69
  70 extern void pcibios_set_master(struct pci_dev *dev);
  71
  72 static inline void pcibios_penalize_isa_irq(int irq)
  73 {
  74         /* We don't do dynamic PCI IRQ allocation */
  75 }
  76
  77 /*
  78  * Dynamic DMA mapping stuff.
  79  * MIPS has everything mapped statically.
  80  */
  81
  82 #include <linux/types.h>
  83 #include <linux/slab.h>
  84 #include <asm/scatterlist.h>
  85 #include <linux/string.h>
  86 #include <asm/io.h>
  87
  88 struct pci_dev;
  89
  90 /*
  91  * The PCI address space does equal the physical memory address space.  The
  92  * networking and block device layers use this boolean for bounce buffer
  93  * decisions.  This is set if any hose does not have an IOMMU.
  94  */
  95 extern unsigned int PCI_DMA_BUS_IS_PHYS;
  96
  97 #ifdef CONFIG_MAPPED_DMA_IO
  98
  99 /* pci_unmap_{single,page} is not a nop, thus... */
 100 #define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME)       dma_addr_t ADDR_NAME;
 101 #define DECLARE_PCI_UNMAP_LEN(LEN_NAME)         __u32 LEN_NAME;
 102 #define pci_unmap_addr(PTR, ADDR_NAME)          ((PTR)->ADDR_NAME)
 103 #define pci_unmap_addr_set(PTR, ADDR_NAME, VAL) (((PTR)->ADDR_NAME) = (VAL))
 104 #define pci_unmap_len(PTR, LEN_NAME)            ((PTR)->LEN_NAME)
 105 #define pci_unmap_len_set(PTR, LEN_NAME, VAL)   (((PTR)->LEN_NAME) = (VAL))
 106
 107 #else /* CONFIG_MAPPED_DMA_IO  */
 108
 109 /* pci_unmap_{page,single} is a nop so... */
 110 #define DECLARE_PCI_UNMAP_ADDR(ADDR_NAME)
 111 #define DECLARE_PCI_UNMAP_LEN(LEN_NAME)
 112 #define pci_unmap_addr(PTR, ADDR_NAME)          (0)
 113 #define pci_unmap_addr_set(PTR, ADDR_NAME, VAL) do { } while (0)
 114 #define pci_unmap_len(PTR, LEN_NAME)            (0)
 115 #define pci_unmap_len_set(PTR, LEN_NAME, VAL)   do { } while (0)
 116
 117 #endif /* CONFIG_MAPPED_DMA_IO  */
 118
 119 /* This is always fine. */
 120 #define pci_dac_dma_supported(pci_dev, mask)    (1)
 121
 122 extern dma64_addr_t pci_dac_page_to_dma(struct pci_dev *pdev,
 123         struct page *page, unsigned long offset, int direction);
 124 extern struct page *pci_dac_dma_to_page(struct pci_dev *pdev,
 125         dma64_addr_t dma_addr);
 126 extern unsigned long pci_dac_dma_to_offset(struct pci_dev *pdev,
 127         dma64_addr_t dma_addr);
 128 extern void pci_dac_dma_sync_single_for_cpu(struct pci_dev *pdev,
 129         dma64_addr_t dma_addr, size_t len, int direction);
 130 extern void pci_dac_dma_sync_single_for_device(struct pci_dev *pdev,
 131         dma64_addr_t dma_addr, size_t len, int direction);
 132
 133 static inline void pci_dma_burst_advice(struct pci_dev *pdev,
 134                                         enum pci_dma_burst_strategy *strat,
 135                                         unsigned long *strategy_parameter)
 136 {
 137         *strat = PCI_DMA_BURST_INFINITY;
 138         *strategy_parameter = ~0UL;
 139 }
 140
 141 extern void pcibios_resource_to_bus(struct pci_dev *dev,
 142         struct pci_bus_region *region, struct resource *res);
 143
 144 #ifdef CONFIG_PCI_DOMAINS
 145
 146 #define pci_domain_nr(bus) ((struct pci_controller *)(bus)->sysdata)->index
 147
 148 static inline int pci_proc_domain(struct pci_bus *bus)
 149 {
 150         struct pci_controller *hose = bus->sysdata;
 151         return hose->need_domain_info;
 152 }
 153
 154 #endif /* CONFIG_PCI_DOMAINS */
 155
 156 #endif /* __KERNEL__ */
 157
 158 /* implement the pci_ DMA API in terms of the generic device dma_ one */
 159 #include <asm-generic/pci-dma-compat.h>
 160
 161 static inline void pcibios_add_platform_entries(struct pci_dev *dev)
 162 {
 163 }
 164
 165 /* Do platform specific device initialization at pci_enable_device() time */
 166 extern int pcibios_plat_dev_init(struct pci_dev *dev);
 167
 168 #endif /* _ASM_PCI_H */