1 #ifndef _ASM_POWERPC_PCI_BRIDGE_H
2 #define _ASM_POWERPC_PCI_BRIDGE_H
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License
7 * as published by the Free Software Foundation; either version
8 * 2 of the License, or (at your option) any later version.
10 #include <linux/pci.h>
11 #include <linux/list.h>
12 #include <linux/ioport.h>
17 /* Force re-assigning all resources (ignore firmware
20 PPC_PCI_REASSIGN_ALL_RSRC
= 0x00000001,
22 /* Re-assign all bus numbers */
23 PPC_PCI_REASSIGN_ALL_BUS
= 0x00000002,
25 /* Do not try to assign, just use existing setup */
26 PPC_PCI_PROBE_ONLY
= 0x00000004,
28 /* Don't bother with ISA alignment unless the bridge has
29 * ISA forwarding enabled
31 PPC_PCI_CAN_SKIP_ISA_ALIGN
= 0x00000008,
33 /* Enable domain numbers in /proc */
34 PPC_PCI_ENABLE_PROC_DOMAINS
= 0x00000010,
35 /* ... except for domain 0 */
36 PPC_PCI_COMPAT_DOMAIN_0
= 0x00000020,
39 extern unsigned int ppc_pci_flags
;
41 static inline void ppc_pci_set_flags(int flags
)
43 ppc_pci_flags
= flags
;
46 static inline void ppc_pci_add_flags(int flags
)
48 ppc_pci_flags
|= flags
;
51 static inline int ppc_pci_has_flag(int flag
)
53 return (ppc_pci_flags
& flag
);
56 static inline void ppc_pci_set_flags(int flags
) { }
57 static inline void ppc_pci_add_flags(int flags
) { }
58 static inline int ppc_pci_has_flag(int flag
)
66 * Structure of a PCI controller (host bridge)
68 struct pci_controller
{
74 struct device_node
*dn
;
75 struct list_head list_node
;
76 struct device
*parent
;
82 void __iomem
*io_base_virt
;
86 resource_size_t io_base_phys
;
87 resource_size_t pci_io_size
;
89 /* Some machines (PReP) have a non 1:1 mapping of
90 * the PCI memory space in the CPU bus space
92 resource_size_t pci_mem_offset
;
94 /* Some machines have a special region to forward the ISA
95 * "memory" cycles such as VGA memory regions. Left to 0
98 resource_size_t isa_mem_phys
;
99 resource_size_t isa_mem_size
;
102 unsigned int __iomem
*cfg_addr
;
103 void __iomem
*cfg_data
;
106 * Used for variants of PCI indirect handling and possible quirks:
107 * SET_CFG_TYPE - used on 4xx or any PHB that does explicit type0/1
108 * EXT_REG - provides access to PCI-e extended registers
109 * SURPRESS_PRIMARY_BUS - we suppress the setting of PCI_PRIMARY_BUS
110 * on Freescale PCI-e controllers since they used the PCI_PRIMARY_BUS
111 * to determine which bus number to match on when generating type0
113 * NO_PCIE_LINK - the Freescale PCI-e controllers have issues with
114 * hanging if we don't have link and try to do config cycles to
115 * anything but the PHB. Only allow talking to the PHB if this is
117 * BIG_ENDIAN - cfg_addr is a big endian register
118 * BROKEN_MRM - the 440EPx/GRx chips have an errata that causes hangs on
119 * the PLB4. Effectively disable MRM commands by setting this.
121 #define PPC_INDIRECT_TYPE_SET_CFG_TYPE 0x00000001
122 #define PPC_INDIRECT_TYPE_EXT_REG 0x00000002
123 #define PPC_INDIRECT_TYPE_SURPRESS_PRIMARY_BUS 0x00000004
124 #define PPC_INDIRECT_TYPE_NO_PCIE_LINK 0x00000008
125 #define PPC_INDIRECT_TYPE_BIG_ENDIAN 0x00000010
126 #define PPC_INDIRECT_TYPE_BROKEN_MRM 0x00000020
128 /* Currently, we limit ourselves to 1 IO range and 3 mem
129 * ranges since the common pci_bus structure can't handle more
131 struct resource io_resource
;
132 struct resource mem_resources
[3];
133 int global_number
; /* PCI domain number */
135 resource_size_t dma_window_base_cur
;
136 resource_size_t dma_window_size
;
142 #endif /* CONFIG_PPC64 */
145 /* These are used for config access before all the PCI probing
147 extern int early_read_config_byte(struct pci_controller
*hose
, int bus
,
148 int dev_fn
, int where
, u8
*val
);
149 extern int early_read_config_word(struct pci_controller
*hose
, int bus
,
150 int dev_fn
, int where
, u16
*val
);
151 extern int early_read_config_dword(struct pci_controller
*hose
, int bus
,
152 int dev_fn
, int where
, u32
*val
);
153 extern int early_write_config_byte(struct pci_controller
*hose
, int bus
,
154 int dev_fn
, int where
, u8 val
);
155 extern int early_write_config_word(struct pci_controller
*hose
, int bus
,
156 int dev_fn
, int where
, u16 val
);
157 extern int early_write_config_dword(struct pci_controller
*hose
, int bus
,
158 int dev_fn
, int where
, u32 val
);
160 extern int early_find_capability(struct pci_controller
*hose
, int bus
,
161 int dev_fn
, int cap
);
163 extern void setup_indirect_pci(struct pci_controller
* hose
,
164 resource_size_t cfg_addr
,
165 resource_size_t cfg_data
, u32 flags
);
167 static inline struct pci_controller
*pci_bus_to_host(const struct pci_bus
*bus
)
172 static inline struct device_node
*pci_device_to_OF_node(struct pci_dev
*dev
)
174 return dev
->dev
.of_node
;
177 static inline struct device_node
*pci_bus_to_OF_node(struct pci_bus
*bus
)
179 return bus
->dev
.of_node
;
184 extern int pci_device_from_OF_node(struct device_node
*node
,
186 extern void pci_create_OF_bus_map(void);
188 static inline int isa_vaddr_is_ioport(void __iomem
*address
)
190 /* No specific ISA handling on ppc32 at this stage, it
191 * all goes through PCI
196 #else /* CONFIG_PPC64 */
199 * PCI stuff, for nodes representing PCI devices, pointed to
200 * by device_node->data.
205 int busno
; /* pci bus number */
206 int devfn
; /* pci device and function number */
208 struct pci_controller
*phb
; /* for pci devices */
209 struct iommu_table
*iommu_table
; /* for phb's or bridges */
210 struct device_node
*node
; /* back-pointer to the device_node */
212 int pci_ext_config_space
; /* for pci devices */
215 struct pci_dev
*pcidev
; /* back-pointer to the pci device */
216 int class_code
; /* pci device class */
217 int eeh_mode
; /* See eeh.h for possible EEH_MODEs */
219 int eeh_pe_config_addr
; /* new-style partition endpoint address */
220 int eeh_check_count
; /* # times driver ignored error */
221 int eeh_freeze_count
; /* # times this device froze up. */
222 int eeh_false_positives
; /* # times this device reported #ff's */
223 u32 config_space
[16]; /* saved PCI config space */
227 /* Get the pointer to a device_node's pci_dn */
228 #define PCI_DN(dn) ((struct pci_dn *) (dn)->data)
230 extern void * update_dn_pci_info(struct device_node
*dn
, void *data
);
232 static inline int pci_device_from_OF_node(struct device_node
*np
,
237 *bus
= PCI_DN(np
)->busno
;
238 *devfn
= PCI_DN(np
)->devfn
;
242 /** Find the bus corresponding to the indicated device node */
243 extern struct pci_bus
*pcibios_find_pci_bus(struct device_node
*dn
);
245 /** Remove all of the PCI devices under this bus */
246 extern void pcibios_remove_pci_devices(struct pci_bus
*bus
);
248 /** Discover new pci devices under this bus, and add them */
249 extern void pcibios_add_pci_devices(struct pci_bus
*bus
);
252 extern void isa_bridge_find_early(struct pci_controller
*hose
);
254 static inline int isa_vaddr_is_ioport(void __iomem
*address
)
256 /* Check if address hits the reserved legacy IO range */
257 unsigned long ea
= (unsigned long)address
;
258 return ea
>= ISA_IO_BASE
&& ea
< ISA_IO_END
;
261 extern int pcibios_unmap_io_space(struct pci_bus
*bus
);
262 extern int pcibios_map_io_space(struct pci_bus
*bus
);
265 #define PHB_SET_NODE(PHB, NODE) ((PHB)->node = (NODE))
267 #define PHB_SET_NODE(PHB, NODE) ((PHB)->node = -1)
270 #endif /* CONFIG_PPC64 */
272 /* Get the PCI host controller for an OF device */
273 extern struct pci_controller
*pci_find_hose_for_OF_device(
274 struct device_node
* node
);
276 /* Fill up host controller resources from the OF node */
277 extern void pci_process_bridge_OF_ranges(struct pci_controller
*hose
,
278 struct device_node
*dev
, int primary
);
280 /* Allocate & free a PCI host bridge structure */
281 extern struct pci_controller
*pcibios_alloc_controller(struct device_node
*dev
);
282 extern void pcibios_free_controller(struct pci_controller
*phb
);
283 extern void pcibios_setup_phb_resources(struct pci_controller
*hose
);
286 extern int pcibios_vaddr_is_ioport(void __iomem
*address
);
288 static inline int pcibios_vaddr_is_ioport(void __iomem
*address
)
292 #endif /* CONFIG_PCI */
294 #endif /* __KERNEL__ */
295 #endif /* _ASM_POWERPC_PCI_BRIDGE_H */