1 #ifndef _ASM_POWERPC_PCI_BRIDGE_H 2 #define _ASM_POWERPC_PCI_BRIDGE_H 3 #ifdef __KERNEL__ 4 /* 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. 9 */ 10 #include <linux/pci.h> 11 #include <linux/list.h> 12 #include <linux/ioport.h> 13 14 struct device_node; 15 16 enum { 17 /* Force re-assigning all resources (ignore firmware 18 * setup completely) 19 */ 20 PPC_PCI_REASSIGN_ALL_RSRC = 0x00000001, 21 22 /* Re-assign all bus numbers */ 23 PPC_PCI_REASSIGN_ALL_BUS = 0x00000002, 24 25 /* Do not try to assign, just use existing setup */ 26 PPC_PCI_PROBE_ONLY = 0x00000004, 27 28 /* Don't bother with ISA alignment unless the bridge has 29 * ISA forwarding enabled 30 */ 31 PPC_PCI_CAN_SKIP_ISA_ALIGN = 0x00000008, 32 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, 37 }; 38 #ifdef CONFIG_PCI 39 extern unsigned int ppc_pci_flags; 40 41 static inline void ppc_pci_set_flags(int flags) 42 { 43 ppc_pci_flags = flags; 44 } 45 46 static inline void ppc_pci_add_flags(int flags) 47 { 48 ppc_pci_flags |= flags; 49 } 50 51 static inline int ppc_pci_has_flag(int flag) 52 { 53 return (ppc_pci_flags & flag); 54 } 55 #else 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) 59 { 60 return 0; 61 } 62 #endif 63 64 65 /* 66 * Structure of a PCI controller (host bridge) 67 */ 68 struct pci_controller { 69 struct pci_bus *bus; 70 char is_dynamic; 71 #ifdef CONFIG_PPC64 72 int node; 73 #endif 74 struct device_node *dn; 75 struct list_head list_node; 76 struct device *parent; 77 78 int first_busno; 79 int last_busno; 80 int self_busno; 81 82 void __iomem *io_base_virt; 83 #ifdef CONFIG_PPC64 84 void *io_base_alloc; 85 #endif 86 resource_size_t io_base_phys; 87 resource_size_t pci_io_size; 88 89 /* Some machines (PReP) have a non 1:1 mapping of 90 * the PCI memory space in the CPU bus space 91 */ 92 resource_size_t pci_mem_offset; 93 94 /* Some machines have a special region to forward the ISA 95 * "memory" cycles such as VGA memory regions. Left to 0 96 * if unsupported 97 */ 98 resource_size_t isa_mem_phys; 99 resource_size_t isa_mem_size; 100 101 struct pci_ops *ops; 102 unsigned int __iomem *cfg_addr; 103 void __iomem *cfg_data; 104 105 /* 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 surpress 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 112 * config cycles 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 116 * set. 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. 120 */ 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 127 u32 indirect_type; 128 /* Currently, we limit ourselves to 1 IO range and 3 mem 129 * ranges since the common pci_bus structure can't handle more 130 */ 131 struct resource io_resource; 132 struct resource mem_resources[3]; 133 int global_number; /* PCI domain number */ 134 135 resource_size_t dma_window_base_cur; 136 resource_size_t dma_window_size; 137 138 #ifdef CONFIG_PPC64 139 unsigned long buid; 140 141 void *private_data; 142 #endif /* CONFIG_PPC64 */ 143 }; 144 145 /* These are used for config access before all the PCI probing 146 has been done. */ 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); 159 160 extern int early_find_capability(struct pci_controller *hose, int bus, 161 int dev_fn, int cap); 162 163 extern void setup_indirect_pci(struct pci_controller* hose, 164 resource_size_t cfg_addr, 165 resource_size_t cfg_data, u32 flags); 166 167 #ifndef CONFIG_PPC64 168 169 static inline struct pci_controller *pci_bus_to_host(const struct pci_bus *bus) 170 { 171 return bus->sysdata; 172 } 173 174 static inline int isa_vaddr_is_ioport(void __iomem *address) 175 { 176 /* No specific ISA handling on ppc32 at this stage, it 177 * all goes through PCI 178 */ 179 return 0; 180 } 181 182 #else /* CONFIG_PPC64 */ 183 184 /* 185 * PCI stuff, for nodes representing PCI devices, pointed to 186 * by device_node->data. 187 */ 188 struct iommu_table; 189 190 struct pci_dn { 191 int busno; /* pci bus number */ 192 int devfn; /* pci device and function number */ 193 194 struct pci_controller *phb; /* for pci devices */ 195 struct iommu_table *iommu_table; /* for phb's or bridges */ 196 struct device_node *node; /* back-pointer to the device_node */ 197 198 int pci_ext_config_space; /* for pci devices */ 199 200 #ifdef CONFIG_EEH 201 struct pci_dev *pcidev; /* back-pointer to the pci device */ 202 int class_code; /* pci device class */ 203 int eeh_mode; /* See eeh.h for possible EEH_MODEs */ 204 int eeh_config_addr; 205 int eeh_pe_config_addr; /* new-style partition endpoint address */ 206 int eeh_check_count; /* # times driver ignored error */ 207 int eeh_freeze_count; /* # times this device froze up. */ 208 int eeh_false_positives; /* # times this device reported #ff's */ 209 u32 config_space[16]; /* saved PCI config space */ 210 #endif 211 }; 212 213 /* Get the pointer to a device_node's pci_dn */ 214 #define PCI_DN(dn) ((struct pci_dn *) (dn)->data) 215 216 extern struct device_node *fetch_dev_dn(struct pci_dev *dev); 217 extern void * update_dn_pci_info(struct device_node *dn, void *data); 218 219 /* Get a device_node from a pci_dev. This code must be fast except 220 * in the case where the sysdata is incorrect and needs to be fixed 221 * up (this will only happen once). 222 * In this case the sysdata will have been inherited from a PCI host 223 * bridge or a PCI-PCI bridge further up the tree, so it will point 224 * to a valid struct pci_dn, just not the one we want. 225 */ 226 static inline struct device_node *pci_device_to_OF_node(struct pci_dev *dev) 227 { 228 struct device_node *dn = dev->sysdata; 229 struct pci_dn *pdn = dn->data; 230 231 if (pdn && pdn->devfn == dev->devfn && pdn->busno == dev->bus->number) 232 return dn; /* fast path. sysdata is good */ 233 return fetch_dev_dn(dev); 234 } 235 236 static inline int pci_device_from_OF_node(struct device_node *np, 237 u8 *bus, u8 *devfn) 238 { 239 if (!PCI_DN(np)) 240 return -ENODEV; 241 *bus = PCI_DN(np)->busno; 242 *devfn = PCI_DN(np)->devfn; 243 return 0; 244 } 245 246 static inline struct device_node *pci_bus_to_OF_node(struct pci_bus *bus) 247 { 248 if (bus->self) 249 return pci_device_to_OF_node(bus->self); 250 else 251 return bus->sysdata; /* Must be root bus (PHB) */ 252 } 253 254 /** Find the bus corresponding to the indicated device node */ 255 extern struct pci_bus *pcibios_find_pci_bus(struct device_node *dn); 256 257 /** Remove all of the PCI devices under this bus */ 258 extern void pcibios_remove_pci_devices(struct pci_bus *bus); 259 260 /** Discover new pci devices under this bus, and add them */ 261 extern void pcibios_add_pci_devices(struct pci_bus *bus); 262 263 static inline struct pci_controller *pci_bus_to_host(const struct pci_bus *bus) 264 { 265 struct device_node *busdn = bus->sysdata; 266 267 BUG_ON(busdn == NULL); 268 return PCI_DN(busdn)->phb; 269 } 270 271 272 extern void isa_bridge_find_early(struct pci_controller *hose); 273 274 static inline int isa_vaddr_is_ioport(void __iomem *address) 275 { 276 /* Check if address hits the reserved legacy IO range */ 277 unsigned long ea = (unsigned long)address; 278 return ea >= ISA_IO_BASE && ea < ISA_IO_END; 279 } 280 281 extern int pcibios_unmap_io_space(struct pci_bus *bus); 282 extern int pcibios_map_io_space(struct pci_bus *bus); 283 284 #ifdef CONFIG_NUMA 285 #define PHB_SET_NODE(PHB, NODE) ((PHB)->node = (NODE)) 286 #else 287 #define PHB_SET_NODE(PHB, NODE) ((PHB)->node = -1) 288 #endif 289 290 #endif /* CONFIG_PPC64 */ 291 292 /* Get the PCI host controller for an OF device */ 293 extern struct pci_controller *pci_find_hose_for_OF_device( 294 struct device_node* node); 295 296 /* Fill up host controller resources from the OF node */ 297 extern void pci_process_bridge_OF_ranges(struct pci_controller *hose, 298 struct device_node *dev, int primary); 299 300 /* Allocate & free a PCI host bridge structure */ 301 extern struct pci_controller *pcibios_alloc_controller(struct device_node *dev); 302 extern void pcibios_free_controller(struct pci_controller *phb); 303 extern void pcibios_setup_phb_resources(struct pci_controller *hose); 304 305 #ifdef CONFIG_PCI 306 extern unsigned long pci_address_to_pio(phys_addr_t address); 307 extern int pcibios_vaddr_is_ioport(void __iomem *address); 308 #else 309 static inline unsigned long pci_address_to_pio(phys_addr_t address) 310 { 311 return (unsigned long)-1; 312 } 313 static inline int pcibios_vaddr_is_ioport(void __iomem *address) 314 { 315 return 0; 316 } 317 #endif /* CONFIG_PCI */ 318 319 #endif /* __KERNEL__ */ 320 #endif /* _ASM_POWERPC_PCI_BRIDGE_H */ 321