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>
16 extern unsigned int ppc_pci_flags;
18 /* Force re-assigning all resources (ignore firmware
21 PPC_PCI_REASSIGN_ALL_RSRC = 0x00000001,
23 /* Re-assign all bus numbers */
24 PPC_PCI_REASSIGN_ALL_BUS = 0x00000002,
26 /* Do not try to assign, just use existing setup */
27 PPC_PCI_PROBE_ONLY = 0x00000004,
29 /* Don't bother with ISA alignment unless the bridge has
30 * ISA forwarding enabled
32 PPC_PCI_CAN_SKIP_ISA_ALIGN = 0x00000008,
34 /* Enable domain numbers in /proc */
35 PPC_PCI_ENABLE_PROC_DOMAINS = 0x00000010,
36 /* ... except for domain 0 */
37 PPC_PCI_COMPAT_DOMAIN_0 = 0x00000020,
42 * Structure of a PCI controller (host bridge)
44 struct pci_controller {
50 struct device_node *dn;
51 struct list_head list_node;
52 struct device *parent;
60 void __iomem *io_base_virt;
64 resource_size_t io_base_phys;
66 resource_size_t pci_io_size;
69 /* Some machines (PReP) have a non 1:1 mapping of
70 * the PCI memory space in the CPU bus space
72 resource_size_t pci_mem_offset;
74 unsigned long pci_io_size;
78 unsigned int __iomem *cfg_addr;
79 void __iomem *cfg_data;
83 * Used for variants of PCI indirect handling and possible quirks:
84 * SET_CFG_TYPE - used on 4xx or any PHB that does explicit type0/1
85 * EXT_REG - provides access to PCI-e extended registers
86 * SURPRESS_PRIMARY_BUS - we surpress the setting of PCI_PRIMARY_BUS
87 * on Freescale PCI-e controllers since they used the PCI_PRIMARY_BUS
88 * to determine which bus number to match on when generating type0
90 * NO_PCIE_LINK - the Freescale PCI-e controllers have issues with
91 * hanging if we don't have link and try to do config cycles to
92 * anything but the PHB. Only allow talking to the PHB if this is
94 * BIG_ENDIAN - cfg_addr is a big endian register
95 * BROKEN_MRM - the 440EPx/GRx chips have an errata that causes hangs on
96 * the PLB4. Effectively disable MRM commands by setting this.
98 #define PPC_INDIRECT_TYPE_SET_CFG_TYPE 0x00000001
99 #define PPC_INDIRECT_TYPE_EXT_REG 0x00000002
100 #define PPC_INDIRECT_TYPE_SURPRESS_PRIMARY_BUS 0x00000004
101 #define PPC_INDIRECT_TYPE_NO_PCIE_LINK 0x00000008
102 #define PPC_INDIRECT_TYPE_BIG_ENDIAN 0x00000010
103 #define PPC_INDIRECT_TYPE_BROKEN_MRM 0x00000020
105 #endif /* !CONFIG_PPC64 */
106 /* Currently, we limit ourselves to 1 IO range and 3 mem
107 * ranges since the common pci_bus structure can't handle more
109 struct resource io_resource;
110 struct resource mem_resources[3];
111 int global_number; /* PCI domain number */
114 unsigned long dma_window_base_cur;
115 unsigned long dma_window_size;
118 #endif /* CONFIG_PPC64 */
123 static inline struct pci_controller *pci_bus_to_host(const struct pci_bus *bus)
128 static inline int isa_vaddr_is_ioport(void __iomem *address)
130 /* No specific ISA handling on ppc32 at this stage, it
131 * all goes through PCI
136 /* These are used for config access before all the PCI probing
138 extern int early_read_config_byte(struct pci_controller *hose, int bus,
139 int dev_fn, int where, u8 *val);
140 extern int early_read_config_word(struct pci_controller *hose, int bus,
141 int dev_fn, int where, u16 *val);
142 extern int early_read_config_dword(struct pci_controller *hose, int bus,
143 int dev_fn, int where, u32 *val);
144 extern int early_write_config_byte(struct pci_controller *hose, int bus,
145 int dev_fn, int where, u8 val);
146 extern int early_write_config_word(struct pci_controller *hose, int bus,
147 int dev_fn, int where, u16 val);
148 extern int early_write_config_dword(struct pci_controller *hose, int bus,
149 int dev_fn, int where, u32 val);
151 extern int early_find_capability(struct pci_controller *hose, int bus,
152 int dev_fn, int cap);
154 extern void setup_indirect_pci(struct pci_controller* hose,
155 resource_size_t cfg_addr,
156 resource_size_t cfg_data, u32 flags);
157 extern void setup_grackle(struct pci_controller *hose);
158 #else /* CONFIG_PPC64 */
161 * PCI stuff, for nodes representing PCI devices, pointed to
162 * by device_node->data.
167 int busno; /* pci bus number */
168 int devfn; /* pci device and function number */
170 struct pci_controller *phb; /* for pci devices */
171 struct iommu_table *iommu_table; /* for phb's or bridges */
172 struct device_node *node; /* back-pointer to the device_node */
174 int pci_ext_config_space; /* for pci devices */
177 struct pci_dev *pcidev; /* back-pointer to the pci device */
178 int class_code; /* pci device class */
179 int eeh_mode; /* See eeh.h for possible EEH_MODEs */
181 int eeh_pe_config_addr; /* new-style partition endpoint address */
182 int eeh_check_count; /* # times driver ignored error */
183 int eeh_freeze_count; /* # times this device froze up. */
184 int eeh_false_positives; /* # times this device reported #ff's */
185 u32 config_space[16]; /* saved PCI config space */
189 /* Get the pointer to a device_node's pci_dn */
190 #define PCI_DN(dn) ((struct pci_dn *) (dn)->data)
192 extern struct device_node *fetch_dev_dn(struct pci_dev *dev);
194 /* Get a device_node from a pci_dev. This code must be fast except
195 * in the case where the sysdata is incorrect and needs to be fixed
196 * up (this will only happen once).
197 * In this case the sysdata will have been inherited from a PCI host
198 * bridge or a PCI-PCI bridge further up the tree, so it will point
199 * to a valid struct pci_dn, just not the one we want.
201 static inline struct device_node *pci_device_to_OF_node(struct pci_dev *dev)
203 struct device_node *dn = dev->sysdata;
204 struct pci_dn *pdn = dn->data;
206 if (pdn && pdn->devfn == dev->devfn && pdn->busno == dev->bus->number)
207 return dn; /* fast path. sysdata is good */
208 return fetch_dev_dn(dev);
211 static inline int pci_device_from_OF_node(struct device_node *np,
216 *bus = PCI_DN(np)->busno;
217 *devfn = PCI_DN(np)->devfn;
221 static inline struct device_node *pci_bus_to_OF_node(struct pci_bus *bus)
224 return pci_device_to_OF_node(bus->self);
226 return bus->sysdata; /* Must be root bus (PHB) */
229 /** Find the bus corresponding to the indicated device node */
230 extern struct pci_bus *pcibios_find_pci_bus(struct device_node *dn);
232 /** Remove all of the PCI devices under this bus */
233 extern void pcibios_remove_pci_devices(struct pci_bus *bus);
235 /** Discover new pci devices under this bus, and add them */
236 extern void pcibios_add_pci_devices(struct pci_bus *bus);
237 extern void pcibios_fixup_new_pci_devices(struct pci_bus *bus);
239 extern int pcibios_remove_root_bus(struct pci_controller *phb);
241 static inline struct pci_controller *pci_bus_to_host(const struct pci_bus *bus)
243 struct device_node *busdn = bus->sysdata;
245 BUG_ON(busdn == NULL);
246 return PCI_DN(busdn)->phb;
250 extern void isa_bridge_find_early(struct pci_controller *hose);
252 static inline int isa_vaddr_is_ioport(void __iomem *address)
254 /* Check if address hits the reserved legacy IO range */
255 unsigned long ea = (unsigned long)address;
256 return ea >= ISA_IO_BASE && ea < ISA_IO_END;
259 extern int pcibios_unmap_io_space(struct pci_bus *bus);
260 extern int pcibios_map_io_space(struct pci_bus *bus);
262 /* Return values for ppc_md.pci_probe_mode function */
263 #define PCI_PROBE_NONE -1 /* Don't look at this bus at all */
264 #define PCI_PROBE_NORMAL 0 /* Do normal PCI probing */
265 #define PCI_PROBE_DEVTREE 1 /* Instantiate from device tree */
268 #define PHB_SET_NODE(PHB, NODE) ((PHB)->node = (NODE))
270 #define PHB_SET_NODE(PHB, NODE) ((PHB)->node = -1)
273 #endif /* CONFIG_PPC64 */
275 /* Get the PCI host controller for an OF device */
276 extern struct pci_controller *pci_find_hose_for_OF_device(
277 struct device_node* node);
279 /* Fill up host controller resources from the OF node */
280 extern void pci_process_bridge_OF_ranges(struct pci_controller *hose,
281 struct device_node *dev, int primary);
283 /* Allocate & free a PCI host bridge structure */
284 extern struct pci_controller *pcibios_alloc_controller(struct device_node *dev);
285 extern void pcibios_free_controller(struct pci_controller *phb);
288 extern unsigned long pci_address_to_pio(phys_addr_t address);
289 extern int pcibios_vaddr_is_ioport(void __iomem *address);
291 static inline unsigned long pci_address_to_pio(phys_addr_t address)
293 return (unsigned long)-1;
295 static inline int pcibios_vaddr_is_ioport(void __iomem *address)
299 #endif /* CONFIG_PCI */
301 #endif /* __KERNEL__ */
302 #endif /* _ASM_POWERPC_PCI_BRIDGE_H */