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
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.
19 #include <linux/ioport.h>
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.
26 struct pci_controller {
27 struct pci_controller *next;
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;
37 /* For compatibility with current (as of July 2003) pciutils
38 and XFree86. Eventually will be removed. */
39 unsigned int need_domain_info;
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);
50 * Used by boards to register their PCI busses before the actual scanning.
52 extern struct pci_controller * alloc_pci_controller(void);
53 extern void register_pci_controller(struct pci_controller *hose);
56 * board supplied pci irq fixup routine
58 extern int pcibios_map_irq(struct pci_dev *dev, u8 slot, u8 pin);
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 */
65 extern unsigned int pcibios_assign_all_busses(void);
67 #define pcibios_scan_all_fns(a, b) 0
69 extern unsigned long PCIBIOS_MIN_IO;
70 extern unsigned long PCIBIOS_MIN_MEM;
72 #define PCIBIOS_MIN_CARDBUS_IO 0x4000
74 extern void pcibios_set_master(struct pci_dev *dev);
76 static inline void pcibios_penalize_isa_irq(int irq, int active)
78 /* We don't do dynamic PCI IRQ allocation */
82 * Dynamic DMA mapping stuff.
83 * MIPS has everything mapped statically.
86 #include <linux/types.h>
87 #include <linux/slab.h>
88 #include <asm/scatterlist.h>
89 #include <linux/string.h>
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.
99 extern unsigned int PCI_DMA_BUS_IS_PHYS;
101 #ifdef CONFIG_DMA_NEED_PCI_MAP_STATE
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))
111 #else /* CONFIG_DMA_NEED_PCI_MAP_STATE */
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)
121 #endif /* CONFIG_DMA_NEED_PCI_MAP_STATE */
123 /* This is always fine. */
124 #define pci_dac_dma_supported(pci_dev, mask) (1)
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);
138 static inline void pci_dma_burst_advice(struct pci_dev *pdev,
139 enum pci_dma_burst_strategy *strat,
140 unsigned long *strategy_parameter)
142 *strat = PCI_DMA_BURST_INFINITY;
143 *strategy_parameter = ~0UL;
147 extern void pcibios_resource_to_bus(struct pci_dev *dev,
148 struct pci_bus_region *region, struct resource *res);
150 extern void pcibios_bus_to_resource(struct pci_dev *dev, struct resource *res,
151 struct pci_bus_region *region);
153 static inline struct resource *
154 pcibios_select_root(struct pci_dev *pdev, struct resource *res)
156 struct resource *root = NULL;
158 if (res->flags & IORESOURCE_IO)
159 root = &ioport_resource;
160 if (res->flags & IORESOURCE_MEM)
161 root = &iomem_resource;
166 #ifdef CONFIG_PCI_DOMAINS
168 #define pci_domain_nr(bus) ((struct pci_controller *)(bus)->sysdata)->index
170 static inline int pci_proc_domain(struct pci_bus *bus)
172 struct pci_controller *hose = bus->sysdata;
173 return hose->need_domain_info;
176 #endif /* CONFIG_PCI_DOMAINS */
178 #endif /* __KERNEL__ */
180 /* implement the pci_ DMA API in terms of the generic device dma_ one */
181 #include <asm-generic/pci-dma-compat.h>
183 static inline void pcibios_add_platform_entries(struct pci_dev *dev)
187 /* Do platform specific device initialization at pci_enable_device() time */
188 extern int pcibios_plat_dev_init(struct pci_dev *dev);
190 #endif /* _ASM_PCI_H */