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 #include <asm-generic/pci-bridge.h> 14 15 struct device_node; 16 17 /* 18 * Structure of a PCI controller (host bridge) 19 */ 20 struct pci_controller { 21 struct pci_bus *bus; 22 char is_dynamic; 23 #ifdef CONFIG_PPC64 24 int node; 25 #endif 26 struct device_node *dn; 27 struct list_head list_node; 28 struct device *parent; 29 30 int first_busno; 31 int last_busno; 32 int self_busno; 33 struct resource busn; 34 35 void __iomem *io_base_virt; 36 #ifdef CONFIG_PPC64 37 void *io_base_alloc; 38 #endif 39 resource_size_t io_base_phys; 40 resource_size_t pci_io_size; 41 42 /* Some machines have a special region to forward the ISA 43 * "memory" cycles such as VGA memory regions. Left to 0 44 * if unsupported 45 */ 46 resource_size_t isa_mem_phys; 47 resource_size_t isa_mem_size; 48 49 struct pci_ops *ops; 50 unsigned int __iomem *cfg_addr; 51 void __iomem *cfg_data; 52 53 /* 54 * Used for variants of PCI indirect handling and possible quirks: 55 * SET_CFG_TYPE - used on 4xx or any PHB that does explicit type0/1 56 * EXT_REG - provides access to PCI-e extended registers 57 * SURPRESS_PRIMARY_BUS - we suppress the setting of PCI_PRIMARY_BUS 58 * on Freescale PCI-e controllers since they used the PCI_PRIMARY_BUS 59 * to determine which bus number to match on when generating type0 60 * config cycles 61 * NO_PCIE_LINK - the Freescale PCI-e controllers have issues with 62 * hanging if we don't have link and try to do config cycles to 63 * anything but the PHB. Only allow talking to the PHB if this is 64 * set. 65 * BIG_ENDIAN - cfg_addr is a big endian register 66 * BROKEN_MRM - the 440EPx/GRx chips have an errata that causes hangs on 67 * the PLB4. Effectively disable MRM commands by setting this. 68 * FSL_CFG_REG_LINK - Freescale controller version in which the PCIe 69 * link status is in a RC PCIe cfg register (vs being a SoC register) 70 */ 71 #define PPC_INDIRECT_TYPE_SET_CFG_TYPE 0x00000001 72 #define PPC_INDIRECT_TYPE_EXT_REG 0x00000002 73 #define PPC_INDIRECT_TYPE_SURPRESS_PRIMARY_BUS 0x00000004 74 #define PPC_INDIRECT_TYPE_NO_PCIE_LINK 0x00000008 75 #define PPC_INDIRECT_TYPE_BIG_ENDIAN 0x00000010 76 #define PPC_INDIRECT_TYPE_BROKEN_MRM 0x00000020 77 #define PPC_INDIRECT_TYPE_FSL_CFG_REG_LINK 0x00000040 78 u32 indirect_type; 79 /* Currently, we limit ourselves to 1 IO range and 3 mem 80 * ranges since the common pci_bus structure can't handle more 81 */ 82 struct resource io_resource; 83 struct resource mem_resources[3]; 84 resource_size_t mem_offset[3]; 85 int global_number; /* PCI domain number */ 86 87 resource_size_t dma_window_base_cur; 88 resource_size_t dma_window_size; 89 90 #ifdef CONFIG_PPC64 91 unsigned long buid; 92 #endif /* CONFIG_PPC64 */ 93 94 void *private_data; 95 }; 96 97 /* These are used for config access before all the PCI probing 98 has been done. */ 99 extern int early_read_config_byte(struct pci_controller *hose, int bus, 100 int dev_fn, int where, u8 *val); 101 extern int early_read_config_word(struct pci_controller *hose, int bus, 102 int dev_fn, int where, u16 *val); 103 extern int early_read_config_dword(struct pci_controller *hose, int bus, 104 int dev_fn, int where, u32 *val); 105 extern int early_write_config_byte(struct pci_controller *hose, int bus, 106 int dev_fn, int where, u8 val); 107 extern int early_write_config_word(struct pci_controller *hose, int bus, 108 int dev_fn, int where, u16 val); 109 extern int early_write_config_dword(struct pci_controller *hose, int bus, 110 int dev_fn, int where, u32 val); 111 112 extern int early_find_capability(struct pci_controller *hose, int bus, 113 int dev_fn, int cap); 114 115 extern void setup_indirect_pci(struct pci_controller* hose, 116 resource_size_t cfg_addr, 117 resource_size_t cfg_data, u32 flags); 118 119 extern int indirect_read_config(struct pci_bus *bus, unsigned int devfn, 120 int offset, int len, u32 *val); 121 122 extern int indirect_write_config(struct pci_bus *bus, unsigned int devfn, 123 int offset, int len, u32 val); 124 125 static inline struct pci_controller *pci_bus_to_host(const struct pci_bus *bus) 126 { 127 return bus->sysdata; 128 } 129 130 #ifndef CONFIG_PPC64 131 132 extern int pci_device_from_OF_node(struct device_node *node, 133 u8 *bus, u8 *devfn); 134 extern void pci_create_OF_bus_map(void); 135 136 static inline int isa_vaddr_is_ioport(void __iomem *address) 137 { 138 /* No specific ISA handling on ppc32 at this stage, it 139 * all goes through PCI 140 */ 141 return 0; 142 } 143 144 #else /* CONFIG_PPC64 */ 145 146 /* 147 * PCI stuff, for nodes representing PCI devices, pointed to 148 * by device_node->data. 149 */ 150 struct iommu_table; 151 152 struct pci_dn { 153 int busno; /* pci bus number */ 154 int devfn; /* pci device and function number */ 155 156 struct pci_controller *phb; /* for pci devices */ 157 struct iommu_table *iommu_table; /* for phb's or bridges */ 158 struct device_node *node; /* back-pointer to the device_node */ 159 160 int pci_ext_config_space; /* for pci devices */ 161 162 bool force_32bit_msi; 163 164 struct pci_dev *pcidev; /* back-pointer to the pci device */ 165 #ifdef CONFIG_EEH 166 struct eeh_dev *edev; /* eeh device */ 167 #endif 168 #define IODA_INVALID_PE (-1) 169 #ifdef CONFIG_PPC_POWERNV 170 int pe_number; 171 #endif 172 }; 173 174 /* Get the pointer to a device_node's pci_dn */ 175 #define PCI_DN(dn) ((struct pci_dn *) (dn)->data) 176 177 extern struct pci_dn *pci_get_pdn(struct pci_dev *pdev); 178 179 extern void * update_dn_pci_info(struct device_node *dn, void *data); 180 181 static inline int pci_device_from_OF_node(struct device_node *np, 182 u8 *bus, u8 *devfn) 183 { 184 if (!PCI_DN(np)) 185 return -ENODEV; 186 *bus = PCI_DN(np)->busno; 187 *devfn = PCI_DN(np)->devfn; 188 return 0; 189 } 190 191 #if defined(CONFIG_EEH) 192 static inline struct eeh_dev *of_node_to_eeh_dev(struct device_node *dn) 193 { 194 /* 195 * For those OF nodes whose parent isn't PCI bridge, they 196 * don't have PCI_DN actually. So we have to skip them for 197 * any EEH operations. 198 */ 199 if (!dn || !PCI_DN(dn)) 200 return NULL; 201 202 return PCI_DN(dn)->edev; 203 } 204 #else 205 #define of_node_to_eeh_dev(x) (NULL) 206 #endif 207 208 /** Find the bus corresponding to the indicated device node */ 209 extern struct pci_bus *pcibios_find_pci_bus(struct device_node *dn); 210 211 /** Remove all of the PCI devices under this bus */ 212 extern void pcibios_remove_pci_devices(struct pci_bus *bus); 213 214 /** Discover new pci devices under this bus, and add them */ 215 extern void pcibios_add_pci_devices(struct pci_bus *bus); 216 217 218 extern void isa_bridge_find_early(struct pci_controller *hose); 219 220 static inline int isa_vaddr_is_ioport(void __iomem *address) 221 { 222 /* Check if address hits the reserved legacy IO range */ 223 unsigned long ea = (unsigned long)address; 224 return ea >= ISA_IO_BASE && ea < ISA_IO_END; 225 } 226 227 extern int pcibios_unmap_io_space(struct pci_bus *bus); 228 extern int pcibios_map_io_space(struct pci_bus *bus); 229 230 #ifdef CONFIG_NUMA 231 #define PHB_SET_NODE(PHB, NODE) ((PHB)->node = (NODE)) 232 #else 233 #define PHB_SET_NODE(PHB, NODE) ((PHB)->node = -1) 234 #endif 235 236 #endif /* CONFIG_PPC64 */ 237 238 /* Get the PCI host controller for an OF device */ 239 extern struct pci_controller *pci_find_hose_for_OF_device( 240 struct device_node* node); 241 242 /* Fill up host controller resources from the OF node */ 243 extern void pci_process_bridge_OF_ranges(struct pci_controller *hose, 244 struct device_node *dev, int primary); 245 246 /* Allocate & free a PCI host bridge structure */ 247 extern struct pci_controller *pcibios_alloc_controller(struct device_node *dev); 248 extern void pcibios_free_controller(struct pci_controller *phb); 249 250 #ifdef CONFIG_PCI 251 extern int pcibios_vaddr_is_ioport(void __iomem *address); 252 #else 253 static inline int pcibios_vaddr_is_ioport(void __iomem *address) 254 { 255 return 0; 256 } 257 #endif /* CONFIG_PCI */ 258 259 #endif /* __KERNEL__ */ 260 #endif /* _ASM_POWERPC_PCI_BRIDGE_H */ 261