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;
32 void __iomem *io_base_virt;
33 unsigned long io_base_phys;
35 /* Some machines have a non 1:1 mapping of
36 * the PCI memory space in the CPU bus space
38 unsigned long pci_mem_offset;
39 unsigned long pci_io_size;
42 volatile unsigned int __iomem *cfg_addr;
43 volatile void __iomem *cfg_data;
45 /* Currently, we limit ourselves to 1 IO range and 3 mem
46 * ranges since the common pci_bus structure can't handle more
48 struct resource io_resource;
49 struct resource mem_resources[3];
53 unsigned long dma_window_base_cur;
54 unsigned long dma_window_size;
58 * PCI stuff, for nodes representing PCI devices, pointed to
59 * by device_node->data.
61 struct pci_controller;
65 int busno; /* pci bus number */
66 int bussubno; /* pci subordinate bus number */
67 int devfn; /* pci device and function number */
68 int class_code; /* pci device class */
70 #ifdef CONFIG_PPC_PSERIES
71 int eeh_mode; /* See eeh.h for possible EEH_MODEs */
73 int eeh_pe_config_addr; /* new-style partition endpoint address */
74 int eeh_check_count; /* # times driver ignored error */
75 int eeh_freeze_count; /* # times this device froze up. */
77 int pci_ext_config_space; /* for pci devices */
78 struct pci_controller *phb; /* for pci devices */
79 struct iommu_table *iommu_table; /* for phb's or bridges */
80 struct pci_dev *pcidev; /* back-pointer to the pci device */
81 struct device_node *node; /* back-pointer to the device_node */
82 u32 config_space[16]; /* saved PCI config space */
85 /* Get the pointer to a device_node's pci_dn */
86 #define PCI_DN(dn) ((struct pci_dn *) (dn)->data)
88 struct device_node *fetch_dev_dn(struct pci_dev *dev);
90 /* Get a device_node from a pci_dev. This code must be fast except
91 * in the case where the sysdata is incorrect and needs to be fixed
92 * up (this will only happen once).
93 * In this case the sysdata will have been inherited from a PCI host
94 * bridge or a PCI-PCI bridge further up the tree, so it will point
95 * to a valid struct pci_dn, just not the one we want.
97 static inline struct device_node *pci_device_to_OF_node(struct pci_dev *dev)
99 struct device_node *dn = dev->sysdata;
100 struct pci_dn *pdn = dn->data;
102 if (pdn && pdn->devfn == dev->devfn && pdn->busno == dev->bus->number)
103 return dn; /* fast path. sysdata is good */
104 return fetch_dev_dn(dev);
107 static inline int pci_device_from_OF_node(struct device_node *np,
112 *bus = PCI_DN(np)->busno;
113 *devfn = PCI_DN(np)->devfn;
117 static inline struct device_node *pci_bus_to_OF_node(struct pci_bus *bus)
120 return pci_device_to_OF_node(bus->self);
122 return bus->sysdata; /* Must be root bus (PHB) */
125 /** Find the bus corresponding to the indicated device node */
126 struct pci_bus * pcibios_find_pci_bus(struct device_node *dn);
128 extern void pci_process_bridge_OF_ranges(struct pci_controller *hose,
129 struct device_node *dev, int primary);
131 /** Remove all of the PCI devices under this bus */
132 void pcibios_remove_pci_devices(struct pci_bus *bus);
134 /** Discover new pci devices under this bus, and add them */
135 void pcibios_add_pci_devices(struct pci_bus * bus);
136 void pcibios_fixup_new_pci_devices(struct pci_bus *bus, int fix_bus);
138 extern int pcibios_remove_root_bus(struct pci_controller *phb);
140 static inline struct pci_controller *pci_bus_to_host(struct pci_bus *bus)
142 struct device_node *busdn = bus->sysdata;
144 BUG_ON(busdn == NULL);
145 return PCI_DN(busdn)->phb;
148 extern struct pci_controller*
149 pci_find_hose_for_OF_device(struct device_node* node);
151 extern struct pci_controller *
152 pcibios_alloc_controller(struct device_node *dev);
153 extern void pcibios_free_controller(struct pci_controller *phb);
156 extern unsigned long pci_address_to_pio(phys_addr_t address);
158 static inline unsigned long pci_address_to_pio(phys_addr_t address)
160 return (unsigned long)-1;
164 /* Return values for ppc_md.pci_probe_mode function */
165 #define PCI_PROBE_NONE -1 /* Don't look at this bus at all */
166 #define PCI_PROBE_NORMAL 0 /* Do normal PCI probing */
167 #define PCI_PROBE_DEVTREE 1 /* Instantiate from device tree */
170 #define PHB_SET_NODE(PHB, NODE) ((PHB)->node = (NODE))
172 #define PHB_SET_NODE(PHB, NODE) ((PHB)->node = -1)
175 #endif /* CONFIG_PPC64 */
176 #endif /* __KERNEL__ */