1 #ifndef _ASM_POWERPC_PCI_BRIDGE_H
2 #define _ASM_POWERPC_PCI_BRIDGE_H
6 #include <linux/list.h>
7 #include <linux/ioport.h>
12 struct pci_controller;
15 * Structure of a PCI controller (host bridge)
17 struct pci_controller {
21 struct list_head list_node;
22 struct device *parent;
28 void __iomem *io_base_virt;
29 resource_size_t io_base_phys;
31 /* Some machines (PReP) have a non 1:1 mapping of
32 * the PCI memory space in the CPU bus space
34 resource_size_t pci_mem_offset;
37 volatile unsigned int __iomem *cfg_addr;
38 volatile void __iomem *cfg_data;
41 * Used for variants of PCI indirect handling and possible quirks:
42 * SET_CFG_TYPE - used on 4xx or any PHB that does explicit type0/1
43 * EXT_REG - provides access to PCI-e extended registers
44 * SURPRESS_PRIMARY_BUS - we surpress the setting of PCI_PRIMARY_BUS
45 * on Freescale PCI-e controllers since they used the PCI_PRIMARY_BUS
46 * to determine which bus number to match on when generating type0
48 * NO_PCIE_LINK - the Freescale PCI-e controllers have issues with
49 * hanging if we don't have link and try to do config cycles to
50 * anything but the PHB. Only allow talking to the PHB if this is
52 * BIG_ENDIAN - cfg_addr is a big endian register
54 #define PPC_INDIRECT_TYPE_SET_CFG_TYPE (0x00000001)
55 #define PPC_INDIRECT_TYPE_EXT_REG (0x00000002)
56 #define PPC_INDIRECT_TYPE_SURPRESS_PRIMARY_BUS (0x00000004)
57 #define PPC_INDIRECT_TYPE_NO_PCIE_LINK (0x00000008)
58 #define PPC_INDIRECT_TYPE_BIG_ENDIAN (0x00000010)
61 /* Currently, we limit ourselves to 1 IO range and 3 mem
62 * ranges since the common pci_bus structure can't handle more
64 struct resource io_resource;
65 struct resource mem_resources[3];
66 int global_number; /* PCI domain number */
69 static inline struct pci_controller *pci_bus_to_host(struct pci_bus *bus)
74 static inline int isa_vaddr_is_ioport(void __iomem *address)
76 /* No specific ISA handling on ppc32 at this stage, it
77 * all goes through PCI
82 /* These are used for config access before all the PCI probing
84 int early_read_config_byte(struct pci_controller *hose, int bus, int dev_fn,
86 int early_read_config_word(struct pci_controller *hose, int bus, int dev_fn,
88 int early_read_config_dword(struct pci_controller *hose, int bus, int dev_fn,
90 int early_write_config_byte(struct pci_controller *hose, int bus, int dev_fn,
92 int early_write_config_word(struct pci_controller *hose, int bus, int dev_fn,
94 int early_write_config_dword(struct pci_controller *hose, int bus, int dev_fn,
97 extern int early_find_capability(struct pci_controller *hose, int bus,
100 extern void setup_indirect_pci(struct pci_controller* hose,
101 resource_size_t cfg_addr,
102 resource_size_t cfg_data, u32 flags);
103 extern void setup_grackle(struct pci_controller *hose);
104 extern void __init update_bridge_resource(struct pci_dev *dev,
105 struct resource *res);
111 * This program is free software; you can redistribute it and/or
112 * modify it under the terms of the GNU General Public License
113 * as published by the Free Software Foundation; either version
114 * 2 of the License, or (at your option) any later version.
118 * Structure of a PCI controller (host bridge)
120 struct pci_controller {
125 struct list_head list_node;
126 struct device *parent;
131 void __iomem *io_base_virt;
133 resource_size_t io_base_phys;
135 /* Some machines have a non 1:1 mapping of
136 * the PCI memory space in the CPU bus space
138 resource_size_t pci_mem_offset;
139 unsigned long pci_io_size;
142 volatile unsigned int __iomem *cfg_addr;
143 volatile void __iomem *cfg_data;
145 /* Currently, we limit ourselves to 1 IO range and 3 mem
146 * ranges since the common pci_bus structure can't handle more
148 struct resource io_resource;
149 struct resource mem_resources[3];
152 unsigned long dma_window_base_cur;
153 unsigned long dma_window_size;
159 * PCI stuff, for nodes representing PCI devices, pointed to
160 * by device_node->data.
162 struct pci_controller;
166 int busno; /* pci bus number */
167 int bussubno; /* pci subordinate bus number */
168 int devfn; /* pci device and function number */
169 int class_code; /* pci device class */
171 struct pci_controller *phb; /* for pci devices */
172 struct iommu_table *iommu_table; /* for phb's or bridges */
173 struct pci_dev *pcidev; /* back-pointer to the pci device */
174 struct device_node *node; /* back-pointer to the device_node */
176 int pci_ext_config_space; /* for pci devices */
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 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 struct pci_bus * pcibios_find_pci_bus(struct device_node *dn);
232 /** Remove all of the PCI devices under this bus */
233 void pcibios_remove_pci_devices(struct pci_bus *bus);
235 /** Discover new pci devices under this bus, and add them */
236 void pcibios_add_pci_devices(struct pci_bus * bus);
237 void pcibios_fixup_new_pci_devices(struct pci_bus *bus, int fix_bus);
239 extern int pcibios_remove_root_bus(struct pci_controller *phb);
241 static inline struct pci_controller *pci_bus_to_host(struct pci_bus *bus)
243 struct device_node *busdn = bus->sysdata;
245 BUG_ON(busdn == NULL);
246 return PCI_DN(busdn)->phb;
249 extern void pcibios_free_controller(struct pci_controller *phb);
251 extern void isa_bridge_find_early(struct pci_controller *hose);
253 static inline int isa_vaddr_is_ioport(void __iomem *address)
255 /* Check if address hits the reserved legacy IO range */
256 unsigned long ea = (unsigned long)address;
257 return ea >= ISA_IO_BASE && ea < ISA_IO_END;
260 extern int pcibios_unmap_io_space(struct pci_bus *bus);
261 extern int pcibios_map_io_space(struct pci_bus *bus);
263 /* Return values for ppc_md.pci_probe_mode function */
264 #define PCI_PROBE_NONE -1 /* Don't look at this bus at all */
265 #define PCI_PROBE_NORMAL 0 /* Do normal PCI probing */
266 #define PCI_PROBE_DEVTREE 1 /* Instantiate from device tree */
269 #define PHB_SET_NODE(PHB, NODE) ((PHB)->node = (NODE))
271 #define PHB_SET_NODE(PHB, NODE) ((PHB)->node = -1)
274 #endif /* CONFIG_PPC64 */
276 /* Get the PCI host controller for an OF device */
277 extern struct pci_controller*
278 pci_find_hose_for_OF_device(struct device_node* node);
280 /* Fill up host controller resources from the OF node */
282 pci_process_bridge_OF_ranges(struct pci_controller *hose,
283 struct device_node *dev, int primary);
285 /* Allocate a new PCI host bridge structure */
286 extern struct pci_controller *
287 pcibios_alloc_controller(struct device_node *dev);
289 extern unsigned long pci_address_to_pio(phys_addr_t address);
290 extern int pcibios_vaddr_is_ioport(void __iomem *address);
292 static inline unsigned long pci_address_to_pio(phys_addr_t address)
294 return (unsigned long)-1;
296 static inline int pcibios_vaddr_is_ioport(void __iomem *address)
304 #endif /* __KERNEL__ */