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
{
26 struct list_head list_node
;
31 void __iomem
*io_base_virt
;
32 unsigned long io_base_phys
;
34 /* Some machines have a non 1:1 mapping of
35 * the PCI memory space in the CPU bus space
37 unsigned long pci_mem_offset
;
38 unsigned long pci_io_size
;
41 volatile unsigned int __iomem
*cfg_addr
;
42 volatile void __iomem
*cfg_data
;
44 /* Currently, we limit ourselves to 1 IO range and 3 mem
45 * ranges since the common pci_bus structure can't handle more
47 struct resource io_resource
;
48 struct resource mem_resources
[3];
52 unsigned long dma_window_base_cur
;
53 unsigned long dma_window_size
;
57 * PCI stuff, for nodes representing PCI devices, pointed to
58 * by device_node->data.
60 struct pci_controller
;
64 int busno
; /* for pci devices */
65 int bussubno
; /* for pci devices */
66 int devfn
; /* for pci devices */
68 #ifdef CONFIG_PPC_PSERIES
69 int eeh_mode
; /* See eeh.h for possible EEH_MODEs */
71 int eeh_check_count
; /* # times driver ignored error */
72 int eeh_freeze_count
; /* # times this device froze up. */
73 int eeh_is_bridge
; /* device is pci-to-pci bridge */
75 int pci_ext_config_space
; /* for pci devices */
76 struct pci_controller
*phb
; /* for pci devices */
77 struct iommu_table
*iommu_table
; /* for phb's or bridges */
78 struct pci_dev
*pcidev
; /* back-pointer to the pci device */
79 struct device_node
*node
; /* back-pointer to the device_node */
80 #ifdef CONFIG_PPC_ISERIES
81 struct list_head Device_List
;
82 int Irq
; /* Assigned IRQ */
83 int Flags
; /* Possible flags(disable/bist)*/
84 u8 LogicalSlot
; /* Hv Slot Index for Tces */
86 u32 config_space
[16]; /* saved PCI config space */
89 /* Get the pointer to a device_node's pci_dn */
90 #define PCI_DN(dn) ((struct pci_dn *) (dn)->data)
92 struct device_node
*fetch_dev_dn(struct pci_dev
*dev
);
94 /* Get a device_node from a pci_dev. This code must be fast except
95 * in the case where the sysdata is incorrect and needs to be fixed
96 * up (this will only happen once).
97 * In this case the sysdata will have been inherited from a PCI host
98 * bridge or a PCI-PCI bridge further up the tree, so it will point
99 * to a valid struct pci_dn, just not the one we want.
101 static inline struct device_node
*pci_device_to_OF_node(struct pci_dev
*dev
)
103 struct device_node
*dn
= dev
->sysdata
;
104 struct pci_dn
*pdn
= dn
->data
;
106 if (pdn
&& pdn
->devfn
== dev
->devfn
&& pdn
->busno
== dev
->bus
->number
)
107 return dn
; /* fast path. sysdata is good */
108 return fetch_dev_dn(dev
);
111 static inline int pci_device_from_OF_node(struct device_node
*np
,
116 *bus
= PCI_DN(np
)->busno
;
117 *devfn
= PCI_DN(np
)->devfn
;
121 static inline struct device_node
*pci_bus_to_OF_node(struct pci_bus
*bus
)
124 return pci_device_to_OF_node(bus
->self
);
126 return bus
->sysdata
; /* Must be root bus (PHB) */
129 /** Find the bus corresponding to the indicated device node */
130 struct pci_bus
* pcibios_find_pci_bus(struct device_node
*dn
);
132 extern void pci_process_bridge_OF_ranges(struct pci_controller
*hose
,
133 struct device_node
*dev
, int primary
);
135 /** Remove all of the PCI devices under this bus */
136 void pcibios_remove_pci_devices(struct pci_bus
*bus
);
138 /** Discover new pci devices under this bus, and add them */
139 void pcibios_add_pci_devices(struct pci_bus
* bus
);
140 void pcibios_fixup_new_pci_devices(struct pci_bus
*bus
, int fix_bus
);
142 extern int pcibios_remove_root_bus(struct pci_controller
*phb
);
144 extern void phbs_remap_io(void);
146 static inline struct pci_controller
*pci_bus_to_host(struct pci_bus
*bus
)
148 struct device_node
*busdn
= bus
->sysdata
;
150 BUG_ON(busdn
== NULL
);
151 return PCI_DN(busdn
)->phb
;
154 extern struct pci_controller
*
155 pci_find_hose_for_OF_device(struct device_node
* node
);
157 extern struct pci_controller
*
158 pcibios_alloc_controller(struct device_node
*dev
);
159 extern void pcibios_free_controller(struct pci_controller
*phb
);
162 extern unsigned long pci_address_to_pio(phys_addr_t address
);
164 static inline unsigned long pci_address_to_pio(phys_addr_t address
)
166 return (unsigned long)-1;
170 /* Return values for ppc_md.pci_probe_mode function */
171 #define PCI_PROBE_NONE -1 /* Don't look at this bus at all */
172 #define PCI_PROBE_NORMAL 0 /* Do normal PCI probing */
173 #define PCI_PROBE_DEVTREE 1 /* Instantiate from device tree */
175 #endif /* CONFIG_PPC64 */
176 #endif /* __KERNEL__ */