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Linus Torvalds1da177e2005-04-16 15:20:36 -07001#ifdef __KERNEL__
2#ifndef _ASM_PCI_BRIDGE_H
3#define _ASM_PCI_BRIDGE_H
4
Stephen Rothwell426c1a12005-10-14 14:51:42 +10005#include <linux/config.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -07006#include <linux/pci.h>
Paul Mackerras76f9f872005-10-10 22:52:26 +10007#include <linux/list.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -07008
9/*
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public License
12 * as published by the Free Software Foundation; either version
13 * 2 of the License, or (at your option) any later version.
14 */
15
16/*
17 * Structure of a PCI controller (host bridge)
18 */
19struct pci_controller {
20 struct pci_bus *bus;
21 char is_dynamic;
22 void *arch_data;
23 struct list_head list_node;
24
25 int first_busno;
26 int last_busno;
27
28 void __iomem *io_base_virt;
29 unsigned long io_base_phys;
30
31 /* Some machines have a non 1:1 mapping of
32 * the PCI memory space in the CPU bus space
33 */
34 unsigned long pci_mem_offset;
35 unsigned long pci_io_size;
36
37 struct pci_ops *ops;
38 volatile unsigned int __iomem *cfg_addr;
Paul Mackerras17a63922005-10-20 21:10:09 +100039 volatile void __iomem *cfg_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -070040
41 /* Currently, we limit ourselves to 1 IO range and 3 mem
42 * ranges since the common pci_bus structure can't handle more
43 */
44 struct resource io_resource;
45 struct resource mem_resources[3];
46 int global_number;
47 int local_number;
48 unsigned long buid;
49 unsigned long dma_window_base_cur;
50 unsigned long dma_window_size;
51};
52
Paul Mackerras16353172005-09-06 13:17:54 +100053/*
54 * PCI stuff, for nodes representing PCI devices, pointed to
55 * by device_node->data.
56 */
57struct pci_controller;
58struct iommu_table;
59
60struct pci_dn {
61 int busno; /* for pci devices */
62 int bussubno; /* for pci devices */
63 int devfn; /* for pci devices */
64 int eeh_mode; /* See eeh.h for possible EEH_MODEs */
65 int eeh_config_addr;
66 int eeh_capable; /* from firmware */
67 int eeh_check_count; /* # times driver ignored error */
68 int eeh_freeze_count; /* # times this device froze up. */
69 int eeh_is_bridge; /* device is pci-to-pci bridge */
70
71 int pci_ext_config_space; /* for pci devices */
72 struct pci_controller *phb; /* for pci devices */
73 struct iommu_table *iommu_table; /* for phb's or bridges */
74 struct pci_dev *pcidev; /* back-pointer to the pci device */
75 struct device_node *node; /* back-pointer to the device_node */
Stephen Rothwell252e75a2005-09-28 14:40:40 +100076#ifdef CONFIG_PPC_ISERIES
Paul Mackerras76f9f872005-10-10 22:52:26 +100077 struct list_head Device_List;
Stephen Rothwell252e75a2005-09-28 14:40:40 +100078 int Irq; /* Assigned IRQ */
79 int Flags; /* Possible flags(disable/bist)*/
80 u8 LogicalSlot; /* Hv Slot Index for Tces */
81#endif
Paul Mackerras16353172005-09-06 13:17:54 +100082 u32 config_space[16]; /* saved PCI config space */
83};
84
85/* Get the pointer to a device_node's pci_dn */
86#define PCI_DN(dn) ((struct pci_dn *) (dn)->data)
87
Linus Torvalds1da177e2005-04-16 15:20:36 -070088struct device_node *fetch_dev_dn(struct pci_dev *dev);
89
Paul Mackerras16353172005-09-06 13:17:54 +100090/* 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.
Linus Torvalds1da177e2005-04-16 15:20:36 -070096 */
97static inline struct device_node *pci_device_to_OF_node(struct pci_dev *dev)
98{
99 struct device_node *dn = dev->sysdata;
Paul Mackerras16353172005-09-06 13:17:54 +1000100 struct pci_dn *pdn = dn->data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700101
Paul Mackerras16353172005-09-06 13:17:54 +1000102 if (pdn && pdn->devfn == dev->devfn && pdn->busno == dev->bus->number)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700103 return dn; /* fast path. sysdata is good */
Paul Mackerras16353172005-09-06 13:17:54 +1000104 return fetch_dev_dn(dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700105}
106
Paul Mackerras40ef8cb2005-10-10 22:50:37 +1000107static inline int pci_device_from_OF_node(struct device_node *np,
108 u8 *bus, u8 *devfn)
109{
110 if (!PCI_DN(np))
111 return -ENODEV;
112 *bus = PCI_DN(np)->busno;
113 *devfn = PCI_DN(np)->devfn;
114 return 0;
115}
116
Linus Torvalds1da177e2005-04-16 15:20:36 -0700117static inline struct device_node *pci_bus_to_OF_node(struct pci_bus *bus)
118{
119 if (bus->self)
120 return pci_device_to_OF_node(bus->self);
121 else
122 return bus->sysdata; /* Must be root bus (PHB) */
123}
124
125extern void pci_process_bridge_OF_ranges(struct pci_controller *hose,
Paul Mackerrasf7abbc12005-10-22 15:03:21 +1000126 struct device_node *dev, int primary);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700127
128extern int pcibios_remove_root_bus(struct pci_controller *phb);
129
130extern void phbs_remap_io(void);
131
132static inline struct pci_controller *pci_bus_to_host(struct pci_bus *bus)
133{
134 struct device_node *busdn = bus->sysdata;
135
136 BUG_ON(busdn == NULL);
Paul Mackerras16353172005-09-06 13:17:54 +1000137 return PCI_DN(busdn)->phb;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700138}
139
Paul Mackerras42672922005-09-12 17:17:36 +1000140/* Return values for ppc_md.pci_probe_mode function */
141#define PCI_PROBE_NONE -1 /* Don't look at this bus at all */
142#define PCI_PROBE_NORMAL 0 /* Do normal PCI probing */
143#define PCI_PROBE_DEVTREE 1 /* Instantiate from device tree */
144
Linus Torvalds1da177e2005-04-16 15:20:36 -0700145#endif
146#endif /* __KERNEL__ */