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 /* 17 * PCI controller operations 18 */ 19 struct pci_controller_ops { 20 void (*dma_dev_setup)(struct pci_dev *pdev); 21 void (*dma_bus_setup)(struct pci_bus *bus); 22 23 int (*probe_mode)(struct pci_bus *bus); 24 25 /* Called when pci_enable_device() is called. Returns true to 26 * allow assignment/enabling of the device. */ 27 bool (*enable_device_hook)(struct pci_dev *pdev); 28 29 void (*disable_device)(struct pci_dev *pdev); 30 31 void (*release_device)(struct pci_dev *pdev); 32 33 /* Called during PCI resource reassignment */ 34 resource_size_t (*window_alignment)(struct pci_bus *bus, 35 unsigned long type); 36 void (*reset_secondary_bus)(struct pci_dev *pdev); 37 38 #ifdef CONFIG_PCI_MSI 39 int (*setup_msi_irqs)(struct pci_dev *pdev, 40 int nvec, int type); 41 void (*teardown_msi_irqs)(struct pci_dev *pdev); 42 #endif 43 44 int (*dma_set_mask)(struct pci_dev *pdev, u64 dma_mask); 45 u64 (*dma_get_required_mask)(struct pci_dev *pdev); 46 47 void (*shutdown)(struct pci_controller *hose); 48 }; 49 50 /* 51 * Structure of a PCI controller (host bridge) 52 */ 53 struct pci_controller { 54 struct pci_bus *bus; 55 char is_dynamic; 56 #ifdef CONFIG_PPC64 57 int node; 58 #endif 59 struct device_node *dn; 60 struct list_head list_node; 61 struct device *parent; 62 63 int first_busno; 64 int last_busno; 65 int self_busno; 66 struct resource busn; 67 68 void __iomem *io_base_virt; 69 #ifdef CONFIG_PPC64 70 void *io_base_alloc; 71 #endif 72 resource_size_t io_base_phys; 73 resource_size_t pci_io_size; 74 75 /* Some machines have a special region to forward the ISA 76 * "memory" cycles such as VGA memory regions. Left to 0 77 * if unsupported 78 */ 79 resource_size_t isa_mem_phys; 80 resource_size_t isa_mem_size; 81 82 struct pci_controller_ops controller_ops; 83 struct pci_ops *ops; 84 unsigned int __iomem *cfg_addr; 85 void __iomem *cfg_data; 86 87 /* 88 * Used for variants of PCI indirect handling and possible quirks: 89 * SET_CFG_TYPE - used on 4xx or any PHB that does explicit type0/1 90 * EXT_REG - provides access to PCI-e extended registers 91 * SURPRESS_PRIMARY_BUS - we suppress the setting of PCI_PRIMARY_BUS 92 * on Freescale PCI-e controllers since they used the PCI_PRIMARY_BUS 93 * to determine which bus number to match on when generating type0 94 * config cycles 95 * NO_PCIE_LINK - the Freescale PCI-e controllers have issues with 96 * hanging if we don't have link and try to do config cycles to 97 * anything but the PHB. Only allow talking to the PHB if this is 98 * set. 99 * BIG_ENDIAN - cfg_addr is a big endian register 100 * BROKEN_MRM - the 440EPx/GRx chips have an errata that causes hangs on 101 * the PLB4. Effectively disable MRM commands by setting this. 102 * FSL_CFG_REG_LINK - Freescale controller version in which the PCIe 103 * link status is in a RC PCIe cfg register (vs being a SoC register) 104 */ 105 #define PPC_INDIRECT_TYPE_SET_CFG_TYPE 0x00000001 106 #define PPC_INDIRECT_TYPE_EXT_REG 0x00000002 107 #define PPC_INDIRECT_TYPE_SURPRESS_PRIMARY_BUS 0x00000004 108 #define PPC_INDIRECT_TYPE_NO_PCIE_LINK 0x00000008 109 #define PPC_INDIRECT_TYPE_BIG_ENDIAN 0x00000010 110 #define PPC_INDIRECT_TYPE_BROKEN_MRM 0x00000020 111 #define PPC_INDIRECT_TYPE_FSL_CFG_REG_LINK 0x00000040 112 u32 indirect_type; 113 /* Currently, we limit ourselves to 1 IO range and 3 mem 114 * ranges since the common pci_bus structure can't handle more 115 */ 116 struct resource io_resource; 117 struct resource mem_resources[3]; 118 resource_size_t mem_offset[3]; 119 int global_number; /* PCI domain number */ 120 121 resource_size_t dma_window_base_cur; 122 resource_size_t dma_window_size; 123 124 #ifdef CONFIG_PPC64 125 unsigned long buid; 126 struct pci_dn *pci_data; 127 #endif /* CONFIG_PPC64 */ 128 129 void *private_data; 130 }; 131 132 /* These are used for config access before all the PCI probing 133 has been done. */ 134 extern int early_read_config_byte(struct pci_controller *hose, int bus, 135 int dev_fn, int where, u8 *val); 136 extern int early_read_config_word(struct pci_controller *hose, int bus, 137 int dev_fn, int where, u16 *val); 138 extern int early_read_config_dword(struct pci_controller *hose, int bus, 139 int dev_fn, int where, u32 *val); 140 extern int early_write_config_byte(struct pci_controller *hose, int bus, 141 int dev_fn, int where, u8 val); 142 extern int early_write_config_word(struct pci_controller *hose, int bus, 143 int dev_fn, int where, u16 val); 144 extern int early_write_config_dword(struct pci_controller *hose, int bus, 145 int dev_fn, int where, u32 val); 146 147 extern int early_find_capability(struct pci_controller *hose, int bus, 148 int dev_fn, int cap); 149 150 extern void setup_indirect_pci(struct pci_controller* hose, 151 resource_size_t cfg_addr, 152 resource_size_t cfg_data, u32 flags); 153 154 extern int indirect_read_config(struct pci_bus *bus, unsigned int devfn, 155 int offset, int len, u32 *val); 156 157 extern int __indirect_read_config(struct pci_controller *hose, 158 unsigned char bus_number, unsigned int devfn, 159 int offset, int len, u32 *val); 160 161 extern int indirect_write_config(struct pci_bus *bus, unsigned int devfn, 162 int offset, int len, u32 val); 163 164 static inline struct pci_controller *pci_bus_to_host(const struct pci_bus *bus) 165 { 166 return bus->sysdata; 167 } 168 169 #ifndef CONFIG_PPC64 170 171 extern int pci_device_from_OF_node(struct device_node *node, 172 u8 *bus, u8 *devfn); 173 extern void pci_create_OF_bus_map(void); 174 175 static inline int isa_vaddr_is_ioport(void __iomem *address) 176 { 177 /* No specific ISA handling on ppc32 at this stage, it 178 * all goes through PCI 179 */ 180 return 0; 181 } 182 183 #else /* CONFIG_PPC64 */ 184 185 /* 186 * PCI stuff, for nodes representing PCI devices, pointed to 187 * by device_node->data. 188 */ 189 struct iommu_table; 190 191 struct pci_dn { 192 int flags; 193 #define PCI_DN_FLAG_IOV_VF 0x01 194 195 int busno; /* pci bus number */ 196 int devfn; /* pci device and function number */ 197 int vendor_id; /* Vendor ID */ 198 int device_id; /* Device ID */ 199 int class_code; /* Device class code */ 200 201 struct pci_dn *parent; 202 struct pci_controller *phb; /* for pci devices */ 203 struct iommu_table_group *table_group; /* for phb's or bridges */ 204 struct device_node *node; /* back-pointer to the device_node */ 205 206 int pci_ext_config_space; /* for pci devices */ 207 208 struct pci_dev *pcidev; /* back-pointer to the pci device */ 209 #ifdef CONFIG_EEH 210 struct eeh_dev *edev; /* eeh device */ 211 #endif 212 #define IODA_INVALID_PE 0xFFFFFFFF 213 #ifdef CONFIG_PPC_POWERNV 214 unsigned int pe_number; 215 int vf_index; /* VF index in the PF */ 216 #ifdef CONFIG_PCI_IOV 217 u16 vfs_expanded; /* number of VFs IOV BAR expanded */ 218 u16 num_vfs; /* number of VFs enabled*/ 219 unsigned int *pe_num_map; /* PE# for the first VF PE or array */ 220 bool m64_single_mode; /* Use M64 BAR in Single Mode */ 221 #define IODA_INVALID_M64 (-1) 222 int (*m64_map)[PCI_SRIOV_NUM_BARS]; 223 #endif /* CONFIG_PCI_IOV */ 224 int mps; /* Maximum Payload Size */ 225 #endif 226 struct list_head child_list; 227 struct list_head list; 228 }; 229 230 /* Get the pointer to a device_node's pci_dn */ 231 #define PCI_DN(dn) ((struct pci_dn *) (dn)->data) 232 233 extern struct pci_dn *pci_get_pdn_by_devfn(struct pci_bus *bus, 234 int devfn); 235 extern struct pci_dn *pci_get_pdn(struct pci_dev *pdev); 236 extern struct pci_dn *add_dev_pci_data(struct pci_dev *pdev); 237 extern void remove_dev_pci_data(struct pci_dev *pdev); 238 extern struct pci_dn *pci_add_device_node_info(struct pci_controller *hose, 239 struct device_node *dn); 240 extern void pci_remove_device_node_info(struct device_node *dn); 241 242 static inline int pci_device_from_OF_node(struct device_node *np, 243 u8 *bus, u8 *devfn) 244 { 245 if (!PCI_DN(np)) 246 return -ENODEV; 247 *bus = PCI_DN(np)->busno; 248 *devfn = PCI_DN(np)->devfn; 249 return 0; 250 } 251 252 #if defined(CONFIG_EEH) 253 static inline struct eeh_dev *pdn_to_eeh_dev(struct pci_dn *pdn) 254 { 255 return pdn ? pdn->edev : NULL; 256 } 257 #else 258 #define pdn_to_eeh_dev(x) (NULL) 259 #endif 260 261 /** Find the bus corresponding to the indicated device node */ 262 extern struct pci_bus *pci_find_bus_by_node(struct device_node *dn); 263 264 /** Remove all of the PCI devices under this bus */ 265 extern void pci_hp_remove_devices(struct pci_bus *bus); 266 267 /** Discover new pci devices under this bus, and add them */ 268 extern void pci_hp_add_devices(struct pci_bus *bus); 269 270 271 extern void isa_bridge_find_early(struct pci_controller *hose); 272 273 static inline int isa_vaddr_is_ioport(void __iomem *address) 274 { 275 /* Check if address hits the reserved legacy IO range */ 276 unsigned long ea = (unsigned long)address; 277 return ea >= ISA_IO_BASE && ea < ISA_IO_END; 278 } 279 280 extern int pcibios_unmap_io_space(struct pci_bus *bus); 281 extern int pcibios_map_io_space(struct pci_bus *bus); 282 283 #ifdef CONFIG_NUMA 284 #define PHB_SET_NODE(PHB, NODE) ((PHB)->node = (NODE)) 285 #else 286 #define PHB_SET_NODE(PHB, NODE) ((PHB)->node = -1) 287 #endif 288 289 #endif /* CONFIG_PPC64 */ 290 291 /* Get the PCI host controller for an OF device */ 292 extern struct pci_controller *pci_find_hose_for_OF_device( 293 struct device_node* node); 294 295 /* Fill up host controller resources from the OF node */ 296 extern void pci_process_bridge_OF_ranges(struct pci_controller *hose, 297 struct device_node *dev, int primary); 298 299 /* Allocate & free a PCI host bridge structure */ 300 extern struct pci_controller *pcibios_alloc_controller(struct device_node *dev); 301 extern void pcibios_free_controller(struct pci_controller *phb); 302 303 #ifdef CONFIG_PCI 304 extern int pcibios_vaddr_is_ioport(void __iomem *address); 305 #else 306 static inline int pcibios_vaddr_is_ioport(void __iomem *address) 307 { 308 return 0; 309 } 310 #endif /* CONFIG_PCI */ 311 312 #endif /* __KERNEL__ */ 313 #endif /* _ASM_POWERPC_PCI_BRIDGE_H */ 314