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-rw-r--r--include/asm-powerpc/pci-bridge.h153
1 files changed, 153 insertions, 0 deletions
diff --git a/include/asm-powerpc/pci-bridge.h b/include/asm-powerpc/pci-bridge.h
new file mode 100644
index 000000000000..223ec7bd81da
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+++ b/include/asm-powerpc/pci-bridge.h
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1#ifndef _ASM_POWERPC_PCI_BRIDGE_H
2#define _ASM_POWERPC_PCI_BRIDGE_H
3
4#ifndef CONFIG_PPC64
5#include <asm-ppc/pci-bridge.h>
6#else
7
8#include <linux/pci.h>
9#include <linux/list.h>
10
11/*
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License
14 * as published by the Free Software Foundation; either version
15 * 2 of the License, or (at your option) any later version.
16 */
17
18/*
19 * Structure of a PCI controller (host bridge)
20 */
21struct pci_controller {
22 struct pci_bus *bus;
23 char is_dynamic;
24 void *arch_data;
25 struct list_head list_node;
26
27 int first_busno;
28 int last_busno;
29
30 void __iomem *io_base_virt;
31 unsigned long io_base_phys;
32
33 /* Some machines have a non 1:1 mapping of
34 * the PCI memory space in the CPU bus space
35 */
36 unsigned long pci_mem_offset;
37 unsigned long pci_io_size;
38
39 struct pci_ops *ops;
40 volatile unsigned int __iomem *cfg_addr;
41 volatile void __iomem *cfg_data;
42
43 /* Currently, we limit ourselves to 1 IO range and 3 mem
44 * ranges since the common pci_bus structure can't handle more
45 */
46 struct resource io_resource;
47 struct resource mem_resources[3];
48 int global_number;
49 int local_number;
50 unsigned long buid;
51 unsigned long dma_window_base_cur;
52 unsigned long dma_window_size;
53};
54
55/*
56 * PCI stuff, for nodes representing PCI devices, pointed to
57 * by device_node->data.
58 */
59struct pci_controller;
60struct iommu_table;
61
62struct pci_dn {
63 int busno; /* for pci devices */
64 int bussubno; /* for pci devices */
65 int devfn; /* for pci devices */
66
67#ifdef CONFIG_PPC_PSERIES
68 int eeh_mode; /* See eeh.h for possible EEH_MODEs */
69 int eeh_config_addr;
70 int eeh_check_count; /* # times driver ignored error */
71 int eeh_freeze_count; /* # times this device froze up. */
72 int eeh_is_bridge; /* device is pci-to-pci bridge */
73#endif
74 int pci_ext_config_space; /* for pci devices */
75 struct pci_controller *phb; /* for pci devices */
76 struct iommu_table *iommu_table; /* for phb's or bridges */
77 struct pci_dev *pcidev; /* back-pointer to the pci device */
78 struct device_node *node; /* back-pointer to the device_node */
79#ifdef CONFIG_PPC_ISERIES
80 struct list_head Device_List;
81 int Irq; /* Assigned IRQ */
82 int Flags; /* Possible flags(disable/bist)*/
83 u8 LogicalSlot; /* Hv Slot Index for Tces */
84#endif
85 u32 config_space[16]; /* saved PCI config space */
86};
87
88/* Get the pointer to a device_node's pci_dn */
89#define PCI_DN(dn) ((struct pci_dn *) (dn)->data)
90
91struct device_node *fetch_dev_dn(struct pci_dev *dev);
92
93/* Get a device_node from a pci_dev. This code must be fast except
94 * in the case where the sysdata is incorrect and needs to be fixed
95 * up (this will only happen once).
96 * In this case the sysdata will have been inherited from a PCI host
97 * bridge or a PCI-PCI bridge further up the tree, so it will point
98 * to a valid struct pci_dn, just not the one we want.
99 */
100static inline struct device_node *pci_device_to_OF_node(struct pci_dev *dev)
101{
102 struct device_node *dn = dev->sysdata;
103 struct pci_dn *pdn = dn->data;
104
105 if (pdn && pdn->devfn == dev->devfn && pdn->busno == dev->bus->number)
106 return dn; /* fast path. sysdata is good */
107 return fetch_dev_dn(dev);
108}
109
110static inline int pci_device_from_OF_node(struct device_node *np,
111 u8 *bus, u8 *devfn)
112{
113 if (!PCI_DN(np))
114 return -ENODEV;
115 *bus = PCI_DN(np)->busno;
116 *devfn = PCI_DN(np)->devfn;
117 return 0;
118}
119
120static inline struct device_node *pci_bus_to_OF_node(struct pci_bus *bus)
121{
122 if (bus->self)
123 return pci_device_to_OF_node(bus->self);
124 else
125 return bus->sysdata; /* Must be root bus (PHB) */
126}
127
128extern void pci_process_bridge_OF_ranges(struct pci_controller *hose,
129 struct device_node *dev, int primary);
130
131extern int pcibios_remove_root_bus(struct pci_controller *phb);
132
133extern void phbs_remap_io(void);
134
135static inline struct pci_controller *pci_bus_to_host(struct pci_bus *bus)
136{
137 struct device_node *busdn = bus->sysdata;
138
139 BUG_ON(busdn == NULL);
140 return PCI_DN(busdn)->phb;
141}
142
143extern struct pci_controller *
144pcibios_alloc_controller(struct device_node *dev);
145extern void pcibios_free_controller(struct pci_controller *phb);
146
147/* Return values for ppc_md.pci_probe_mode function */
148#define PCI_PROBE_NONE -1 /* Don't look at this bus at all */
149#define PCI_PROBE_NORMAL 0 /* Do normal PCI probing */
150#define PCI_PROBE_DEVTREE 1 /* Instantiate from device tree */
151
152#endif /* CONFIG_PPC64 */
153#endif
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