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 #ifndef CONFIG_PPC64 81 int self_busno; 82 #endif 83 84 void __iomem *io_base_virt; 85 #ifdef CONFIG_PPC64 86 void *io_base_alloc; 87 #endif 88 resource_size_t io_base_phys; 89 resource_size_t pci_io_size; 90 91 /* Some machines (PReP) have a non 1:1 mapping of 92 * the PCI memory space in the CPU bus space 93 */ 94 resource_size_t pci_mem_offset; 95 96 /* Some machines have a special region to forward the ISA 97 * "memory" cycles such as VGA memory regions. Left to 0 98 * if unsupported 99 */ 100 resource_size_t isa_mem_phys; 101 resource_size_t isa_mem_size; 102 103 struct pci_ops *ops; 104 unsigned int __iomem *cfg_addr; 105 void __iomem *cfg_data; 106 107 #ifndef CONFIG_PPC64 108 /* 109 * Used for variants of PCI indirect handling and possible quirks: 110 * SET_CFG_TYPE - used on 4xx or any PHB that does explicit type0/1 111 * EXT_REG - provides access to PCI-e extended registers 112 * SURPRESS_PRIMARY_BUS - we surpress the setting of PCI_PRIMARY_BUS 113 * on Freescale PCI-e controllers since they used the PCI_PRIMARY_BUS 114 * to determine which bus number to match on when generating type0 115 * config cycles 116 * NO_PCIE_LINK - the Freescale PCI-e controllers have issues with 117 * hanging if we don't have link and try to do config cycles to 118 * anything but the PHB. Only allow talking to the PHB if this is 119 * set. 120 * BIG_ENDIAN - cfg_addr is a big endian register 121 * BROKEN_MRM - the 440EPx/GRx chips have an errata that causes hangs on 122 * the PLB4. Effectively disable MRM commands by setting this. 123 */ 124 #define PPC_INDIRECT_TYPE_SET_CFG_TYPE 0x00000001 125 #define PPC_INDIRECT_TYPE_EXT_REG 0x00000002 126 #define PPC_INDIRECT_TYPE_SURPRESS_PRIMARY_BUS 0x00000004 127 #define PPC_INDIRECT_TYPE_NO_PCIE_LINK 0x00000008 128 #define PPC_INDIRECT_TYPE_BIG_ENDIAN 0x00000010 129 #define PPC_INDIRECT_TYPE_BROKEN_MRM 0x00000020 130 u32 indirect_type; 131 #endif /* !CONFIG_PPC64 */ 132 /* Currently, we limit ourselves to 1 IO range and 3 mem 133 * ranges since the common pci_bus structure can't handle more 134 */ 135 struct resource io_resource; 136 struct resource mem_resources[3]; 137 int global_number; /* PCI domain number */ 138 139 resource_size_t dma_window_base_cur; 140 resource_size_t dma_window_size; 141 142 #ifdef CONFIG_PPC64 143 unsigned long buid; 144 145 void *private_data; 146 #endif /* CONFIG_PPC64 */ 147 }; 148 149 #ifndef CONFIG_PPC64 150 151 static inline struct pci_controller *pci_bus_to_host(const struct pci_bus *bus) 152 { 153 return bus->sysdata; 154 } 155 156 static inline int isa_vaddr_is_ioport(void __iomem *address) 157 { 158 /* No specific ISA handling on ppc32 at this stage, it 159 * all goes through PCI 160 */ 161 return 0; 162 } 163 164 /* These are used for config access before all the PCI probing 165 has been done. */ 166 extern int early_read_config_byte(struct pci_controller *hose, int bus, 167 int dev_fn, int where, u8 *val); 168 extern int early_read_config_word(struct pci_controller *hose, int bus, 169 int dev_fn, int where, u16 *val); 170 extern int early_read_config_dword(struct pci_controller *hose, int bus, 171 int dev_fn, int where, u32 *val); 172 extern int early_write_config_byte(struct pci_controller *hose, int bus, 173 int dev_fn, int where, u8 val); 174 extern int early_write_config_word(struct pci_controller *hose, int bus, 175 int dev_fn, int where, u16 val); 176 extern int early_write_config_dword(struct pci_controller *hose, int bus, 177 int dev_fn, int where, u32 val); 178 179 extern int early_find_capability(struct pci_controller *hose, int bus, 180 int dev_fn, int cap); 181 182 extern void setup_indirect_pci(struct pci_controller* hose, 183 resource_size_t cfg_addr, 184 resource_size_t cfg_data, u32 flags); 185 #else /* CONFIG_PPC64 */ 186 187 /* 188 * PCI stuff, for nodes representing PCI devices, pointed to 189 * by device_node->data. 190 */ 191 struct iommu_table; 192 193 struct pci_dn { 194 int busno; /* pci bus number */ 195 int devfn; /* pci device and function number */ 196 197 struct pci_controller *phb; /* for pci devices */ 198 struct iommu_table *iommu_table; /* for phb's or bridges */ 199 struct device_node *node; /* back-pointer to the device_node */ 200 201 int pci_ext_config_space; /* for pci devices */ 202 203 #ifdef CONFIG_EEH 204 struct pci_dev *pcidev; /* back-pointer to the pci device */ 205 int class_code; /* pci device class */ 206 int eeh_mode; /* See eeh.h for possible EEH_MODEs */ 207 int eeh_config_addr; 208 int eeh_pe_config_addr; /* new-style partition endpoint address */ 209 int eeh_check_count; /* # times driver ignored error */ 210 int eeh_freeze_count; /* # times this device froze up. */ 211 int eeh_false_positives; /* # times this device reported #ff's */ 212 u32 config_space[16]; /* saved PCI config space */ 213 #endif 214 }; 215 216 /* Get the pointer to a device_node's pci_dn */ 217 #define PCI_DN(dn) ((struct pci_dn *) (dn)->data) 218 219 extern struct device_node *fetch_dev_dn(struct pci_dev *dev); 220 extern void * update_dn_pci_info(struct device_node *dn, void *data); 221 222 /* Get a device_node from a pci_dev. This code must be fast except 223 * in the case where the sysdata is incorrect and needs to be fixed 224 * up (this will only happen once). 225 * In this case the sysdata will have been inherited from a PCI host 226 * bridge or a PCI-PCI bridge further up the tree, so it will point 227 * to a valid struct pci_dn, just not the one we want. 228 */ 229 static inline struct device_node *pci_device_to_OF_node(struct pci_dev *dev) 230 { 231 struct device_node *dn = dev->sysdata; 232 struct pci_dn *pdn = dn->data; 233 234 if (pdn && pdn->devfn == dev->devfn && pdn->busno == dev->bus->number) 235 return dn; /* fast path. sysdata is good */ 236 return fetch_dev_dn(dev); 237 } 238 239 static inline int pci_device_from_OF_node(struct device_node *np, 240 u8 *bus, u8 *devfn) 241 { 242 if (!PCI_DN(np)) 243 return -ENODEV; 244 *bus = PCI_DN(np)->busno; 245 *devfn = PCI_DN(np)->devfn; 246 return 0; 247 } 248 249 static inline struct device_node *pci_bus_to_OF_node(struct pci_bus *bus) 250 { 251 if (bus->self) 252 return pci_device_to_OF_node(bus->self); 253 else 254 return bus->sysdata; /* Must be root bus (PHB) */ 255 } 256 257 /** Find the bus corresponding to the indicated device node */ 258 extern struct pci_bus *pcibios_find_pci_bus(struct device_node *dn); 259 260 /** Remove all of the PCI devices under this bus */ 261 extern void pcibios_remove_pci_devices(struct pci_bus *bus); 262 263 /** Discover new pci devices under this bus, and add them */ 264 extern void pcibios_add_pci_devices(struct pci_bus *bus); 265 266 static inline struct pci_controller *pci_bus_to_host(const struct pci_bus *bus) 267 { 268 struct device_node *busdn = bus->sysdata; 269 270 BUG_ON(busdn == NULL); 271 return PCI_DN(busdn)->phb; 272 } 273 274 275 extern void isa_bridge_find_early(struct pci_controller *hose); 276 277 static inline int isa_vaddr_is_ioport(void __iomem *address) 278 { 279 /* Check if address hits the reserved legacy IO range */ 280 unsigned long ea = (unsigned long)address; 281 return ea >= ISA_IO_BASE && ea < ISA_IO_END; 282 } 283 284 extern int pcibios_unmap_io_space(struct pci_bus *bus); 285 extern int pcibios_map_io_space(struct pci_bus *bus); 286 287 /* Return values for ppc_md.pci_probe_mode function */ 288 #define PCI_PROBE_NONE -1 /* Don't look at this bus at all */ 289 #define PCI_PROBE_NORMAL 0 /* Do normal PCI probing */ 290 #define PCI_PROBE_DEVTREE 1 /* Instantiate from device tree */ 291 292 #ifdef CONFIG_NUMA 293 #define PHB_SET_NODE(PHB, NODE) ((PHB)->node = (NODE)) 294 #else 295 #define PHB_SET_NODE(PHB, NODE) ((PHB)->node = -1) 296 #endif 297 298 #endif /* CONFIG_PPC64 */ 299 300 /* Get the PCI host controller for an OF device */ 301 extern struct pci_controller *pci_find_hose_for_OF_device( 302 struct device_node* node); 303 304 /* Fill up host controller resources from the OF node */ 305 extern void pci_process_bridge_OF_ranges(struct pci_controller *hose, 306 struct device_node *dev, int primary); 307 308 /* Allocate & free a PCI host bridge structure */ 309 extern struct pci_controller *pcibios_alloc_controller(struct device_node *dev); 310 extern void pcibios_free_controller(struct pci_controller *phb); 311 extern void pcibios_setup_phb_resources(struct pci_controller *hose); 312 313 #ifdef CONFIG_PCI 314 extern unsigned long pci_address_to_pio(phys_addr_t address); 315 extern int pcibios_vaddr_is_ioport(void __iomem *address); 316 #else 317 static inline unsigned long pci_address_to_pio(phys_addr_t address) 318 { 319 return (unsigned long)-1; 320 } 321 static inline int pcibios_vaddr_is_ioport(void __iomem *address) 322 { 323 return 0; 324 } 325 #endif /* CONFIG_PCI */ 326 327 #endif /* __KERNEL__ */ 328 #endif /* _ASM_POWERPC_PCI_BRIDGE_H */ 329