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 extern int pci_probe_only; 176 177 extern char * (*pcibios_plat_setup)(char *str); 178 179 #endif /* _ASM_PCI_H */ 180