1 #ifndef _ASM_POWERPC_PCI_BRIDGE_H
2 #define _ASM_POWERPC_PCI_BRIDGE_H
6 #include <asm-ppc/pci-bridge.h>
10 #include <linux/list.h>
13 * This program is free software; you can redistribute it and/or
14 * modify it under the terms of the GNU General Public License
15 * as published by the Free Software Foundation; either version
16 * 2 of the License, or (at your option) any later version.
20 * Structure of a PCI controller (host bridge)
22 struct pci_controller {
27 struct list_head list_node;
28 struct device *parent;
33 void __iomem *io_base_virt;
35 resource_size_t io_base_phys;
37 /* Some machines have a non 1:1 mapping of
38 * the PCI memory space in the CPU bus space
40 resource_size_t pci_mem_offset;
41 unsigned long pci_io_size;
44 volatile unsigned int __iomem *cfg_addr;
45 volatile void __iomem *cfg_data;
47 /* Currently, we limit ourselves to 1 IO range and 3 mem
48 * ranges since the common pci_bus structure can't handle more
50 struct resource io_resource;
51 struct resource mem_resources[3];
55 unsigned long dma_window_base_cur;
56 unsigned long dma_window_size;
62 * PCI stuff, for nodes representing PCI devices, pointed to
63 * by device_node->data.
65 struct pci_controller;
69 int busno; /* pci bus number */
70 int bussubno; /* pci subordinate bus number */
71 int devfn; /* pci device and function number */
72 int class_code; /* pci device class */
74 struct pci_controller *phb; /* for pci devices */
75 struct iommu_table *iommu_table; /* for phb's or bridges */
76 struct pci_dev *pcidev; /* back-pointer to the pci device */
77 struct device_node *node; /* back-pointer to the device_node */
79 int pci_ext_config_space; /* for pci devices */
82 int eeh_mode; /* See eeh.h for possible EEH_MODEs */
84 int eeh_pe_config_addr; /* new-style partition endpoint address */
85 int eeh_check_count; /* # times driver ignored error */
86 int eeh_freeze_count; /* # times this device froze up. */
87 int eeh_false_positives; /* # times this device reported #ff's */
88 u32 config_space[16]; /* saved PCI config space */
92 /* Get the pointer to a device_node's pci_dn */
93 #define PCI_DN(dn) ((struct pci_dn *) (dn)->data)
95 struct device_node *fetch_dev_dn(struct pci_dev *dev);
97 /* Get a device_node from a pci_dev. This code must be fast except
98 * in the case where the sysdata is incorrect and needs to be fixed
99 * up (this will only happen once).
100 * In this case the sysdata will have been inherited from a PCI host
101 * bridge or a PCI-PCI bridge further up the tree, so it will point
102 * to a valid struct pci_dn, just not the one we want.
104 static inline struct device_node *pci_device_to_OF_node(struct pci_dev *dev)
106 struct device_node *dn = dev->sysdata;
107 struct pci_dn *pdn = dn->data;
109 if (pdn && pdn->devfn == dev->devfn && pdn->busno == dev->bus->number)
110 return dn; /* fast path. sysdata is good */
111 return fetch_dev_dn(dev);
114 static inline int pci_device_from_OF_node(struct device_node *np,
119 *bus = PCI_DN(np)->busno;
120 *devfn = PCI_DN(np)->devfn;
124 static inline struct device_node *pci_bus_to_OF_node(struct pci_bus *bus)
127 return pci_device_to_OF_node(bus->self);
129 return bus->sysdata; /* Must be root bus (PHB) */
132 /** Find the bus corresponding to the indicated device node */
133 struct pci_bus * pcibios_find_pci_bus(struct device_node *dn);
135 extern void pci_process_bridge_OF_ranges(struct pci_controller *hose,
136 struct device_node *dev, int primary);
138 /** Remove all of the PCI devices under this bus */
139 void pcibios_remove_pci_devices(struct pci_bus *bus);
141 /** Discover new pci devices under this bus, and add them */
142 void pcibios_add_pci_devices(struct pci_bus * bus);
143 void pcibios_fixup_new_pci_devices(struct pci_bus *bus, int fix_bus);
145 extern int pcibios_remove_root_bus(struct pci_controller *phb);
147 static inline struct pci_controller *pci_bus_to_host(struct pci_bus *bus)
149 struct device_node *busdn = bus->sysdata;
151 BUG_ON(busdn == NULL);
152 return PCI_DN(busdn)->phb;
155 extern struct pci_controller*
156 pci_find_hose_for_OF_device(struct device_node* node);
158 extern struct pci_controller *
159 pcibios_alloc_controller(struct device_node *dev);
160 extern void pcibios_free_controller(struct pci_controller *phb);
163 extern unsigned long pci_address_to_pio(phys_addr_t address);
165 static inline unsigned long pci_address_to_pio(phys_addr_t address)
167 return (unsigned long)-1;
171 extern void isa_bridge_find_early(struct pci_controller *hose);
173 extern int pcibios_unmap_io_space(struct pci_bus *bus);
174 extern int pcibios_map_io_space(struct pci_bus *bus);
176 /* Return values for ppc_md.pci_probe_mode function */
177 #define PCI_PROBE_NONE -1 /* Don't look at this bus at all */
178 #define PCI_PROBE_NORMAL 0 /* Do normal PCI probing */
179 #define PCI_PROBE_DEVTREE 1 /* Instantiate from device tree */
182 #define PHB_SET_NODE(PHB, NODE) ((PHB)->node = (NODE))
184 #define PHB_SET_NODE(PHB, NODE) ((PHB)->node = -1)
187 #endif /* CONFIG_PPC64 */
188 #endif /* __KERNEL__ */