1#ifndef _ASM_POWERPC_PCI_BRIDGE_H
2#define _ASM_POWERPC_PCI_BRIDGE_H
3#ifdef __KERNEL__
4
5#ifndef CONFIG_PPC64
6#include <asm-ppc/pci-bridge.h>
7#else
8
9#include <linux/pci.h>
10#include <linux/list.h>
11
12/*
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.
17 */
18
19/*
20 * Structure of a PCI controller (host bridge)
21 */
22struct pci_controller {
23	struct pci_bus *bus;
24	char is_dynamic;
25	int node;
26	void *arch_data;
27	struct list_head list_node;
28	struct device *parent;
29
30	int first_busno;
31	int last_busno;
32
33	void __iomem *io_base_virt;
34	resource_size_t io_base_phys;
35
36	/* Some machines have a non 1:1 mapping of
37	 * the PCI memory space in the CPU bus space
38	 */
39	resource_size_t pci_mem_offset;
40	unsigned long pci_io_size;
41
42	struct pci_ops *ops;
43	volatile unsigned int __iomem *cfg_addr;
44	volatile void __iomem *cfg_data;
45
46	/* Currently, we limit ourselves to 1 IO range and 3 mem
47	 * ranges since the common pci_bus structure can't handle more
48	 */
49	struct resource io_resource;
50	struct resource mem_resources[3];
51	int global_number;
52	int local_number;
53	unsigned long buid;
54	unsigned long dma_window_base_cur;
55	unsigned long dma_window_size;
56
57	void *private_data;
58};
59
60/*
61 * PCI stuff, for nodes representing PCI devices, pointed to
62 * by device_node->data.
63 */
64struct pci_controller;
65struct iommu_table;
66
67struct pci_dn {
68	int	busno;			/* pci bus number */
69	int	bussubno;		/* pci subordinate bus number */
70	int	devfn;			/* pci device and function number */
71	int	class_code;		/* pci device class */
72
73#ifdef CONFIG_PPC_PSERIES
74	int	eeh_mode;		/* See eeh.h for possible EEH_MODEs */
75	int	eeh_config_addr;
76	int	eeh_pe_config_addr; /* new-style partition endpoint address */
77	int 	eeh_check_count;	/* # times driver ignored error */
78	int 	eeh_freeze_count;	/* # times this device froze up. */
79#endif
80	int	pci_ext_config_space;	/* for pci devices */
81	struct  pci_controller *phb;	/* for pci devices */
82	struct	iommu_table *iommu_table;	/* for phb's or bridges */
83	struct	pci_dev *pcidev;	/* back-pointer to the pci device */
84	struct	device_node *node;	/* back-pointer to the device_node */
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
128/** Find the bus corresponding to the indicated device node */
129struct pci_bus * pcibios_find_pci_bus(struct device_node *dn);
130
131extern void pci_process_bridge_OF_ranges(struct pci_controller *hose,
132					 struct device_node *dev, int primary);
133
134/** Remove all of the PCI devices under this bus */
135void pcibios_remove_pci_devices(struct pci_bus *bus);
136
137/** Discover new pci devices under this bus, and add them */
138void pcibios_add_pci_devices(struct pci_bus * bus);
139void pcibios_fixup_new_pci_devices(struct pci_bus *bus, int fix_bus);
140
141extern int pcibios_remove_root_bus(struct pci_controller *phb);
142
143static inline struct pci_controller *pci_bus_to_host(struct pci_bus *bus)
144{
145	struct device_node *busdn = bus->sysdata;
146
147	BUG_ON(busdn == NULL);
148	return PCI_DN(busdn)->phb;
149}
150
151extern struct pci_controller*
152pci_find_hose_for_OF_device(struct device_node* node);
153
154extern struct pci_controller *
155pcibios_alloc_controller(struct device_node *dev);
156extern void pcibios_free_controller(struct pci_controller *phb);
157
158#ifdef CONFIG_PCI
159extern unsigned long pci_address_to_pio(phys_addr_t address);
160#else
161static inline unsigned long pci_address_to_pio(phys_addr_t address)
162{
163	return (unsigned long)-1;
164}
165#endif
166
167/* Return values for ppc_md.pci_probe_mode function */
168#define PCI_PROBE_NONE		-1	/* Don't look at this bus at all */
169#define PCI_PROBE_NORMAL	0	/* Do normal PCI probing */
170#define PCI_PROBE_DEVTREE	1	/* Instantiate from device tree */
171
172#ifdef CONFIG_NUMA
173#define PHB_SET_NODE(PHB, NODE)		((PHB)->node = (NODE))
174#else
175#define PHB_SET_NODE(PHB, NODE)		((PHB)->node = -1)
176#endif
177
178#endif /* CONFIG_PPC64 */
179#endif /* __KERNEL__ */
180#endif
181