1 /* SPDX-License-Identifier: GPL-2.0-or-later */ 2 #ifndef _ASM_POWERPC_PCI_BRIDGE_H 3 #define _ASM_POWERPC_PCI_BRIDGE_H 4 #ifdef __KERNEL__ 5 /* 6 */ 7 #include <linux/pci.h> 8 #include <linux/list.h> 9 #include <linux/ioport.h> 10 #include <linux/numa.h> 11 12 struct device_node; 13 14 /* 15 * PCI controller operations 16 */ 17 struct pci_controller_ops { 18 void (*dma_dev_setup)(struct pci_dev *pdev); 19 void (*dma_bus_setup)(struct pci_bus *bus); 20 bool (*iommu_bypass_supported)(struct pci_dev *pdev, 21 u64 mask); 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 (*setup_bridge)(struct pci_bus *bus, 37 unsigned long type); 38 void (*reset_secondary_bus)(struct pci_dev *pdev); 39 40 #ifdef CONFIG_PCI_MSI 41 int (*setup_msi_irqs)(struct pci_dev *pdev, 42 int nvec, int type); 43 void (*teardown_msi_irqs)(struct pci_dev *pdev); 44 #endif 45 46 void (*shutdown)(struct pci_controller *hose); 47 }; 48 49 /* 50 * Structure of a PCI controller (host bridge) 51 */ 52 struct pci_controller { 53 struct pci_bus *bus; 54 char is_dynamic; 55 #ifdef CONFIG_PPC64 56 int node; 57 #endif 58 struct device_node *dn; 59 struct list_head list_node; 60 struct device *parent; 61 62 int first_busno; 63 int last_busno; 64 int self_busno; 65 struct resource busn; 66 67 void __iomem *io_base_virt; 68 #ifdef CONFIG_PPC64 69 void __iomem *io_base_alloc; 70 #endif 71 resource_size_t io_base_phys; 72 resource_size_t pci_io_size; 73 74 /* Some machines have a special region to forward the ISA 75 * "memory" cycles such as VGA memory regions. Left to 0 76 * if unsupported 77 */ 78 resource_size_t isa_mem_phys; 79 resource_size_t isa_mem_size; 80 81 struct pci_controller_ops controller_ops; 82 struct pci_ops *ops; 83 unsigned int __iomem *cfg_addr; 84 void __iomem *cfg_data; 85 86 /* 87 * Used for variants of PCI indirect handling and possible quirks: 88 * SET_CFG_TYPE - used on 4xx or any PHB that does explicit type0/1 89 * EXT_REG - provides access to PCI-e extended registers 90 * SURPRESS_PRIMARY_BUS - we suppress the setting of PCI_PRIMARY_BUS 91 * on Freescale PCI-e controllers since they used the PCI_PRIMARY_BUS 92 * to determine which bus number to match on when generating type0 93 * config cycles 94 * NO_PCIE_LINK - the Freescale PCI-e controllers have issues with 95 * hanging if we don't have link and try to do config cycles to 96 * anything but the PHB. Only allow talking to the PHB if this is 97 * set. 98 * BIG_ENDIAN - cfg_addr is a big endian register 99 * BROKEN_MRM - the 440EPx/GRx chips have an errata that causes hangs on 100 * the PLB4. Effectively disable MRM commands by setting this. 101 * FSL_CFG_REG_LINK - Freescale controller version in which the PCIe 102 * link status is in a RC PCIe cfg register (vs being a SoC register) 103 */ 104 #define PPC_INDIRECT_TYPE_SET_CFG_TYPE 0x00000001 105 #define PPC_INDIRECT_TYPE_EXT_REG 0x00000002 106 #define PPC_INDIRECT_TYPE_SURPRESS_PRIMARY_BUS 0x00000004 107 #define PPC_INDIRECT_TYPE_NO_PCIE_LINK 0x00000008 108 #define PPC_INDIRECT_TYPE_BIG_ENDIAN 0x00000010 109 #define PPC_INDIRECT_TYPE_BROKEN_MRM 0x00000020 110 #define PPC_INDIRECT_TYPE_FSL_CFG_REG_LINK 0x00000040 111 u32 indirect_type; 112 /* Currently, we limit ourselves to 1 IO range and 3 mem 113 * ranges since the common pci_bus structure can't handle more 114 */ 115 struct resource io_resource; 116 struct resource mem_resources[3]; 117 resource_size_t mem_offset[3]; 118 int global_number; /* PCI domain number */ 119 120 resource_size_t dma_window_base_cur; 121 resource_size_t dma_window_size; 122 123 #ifdef CONFIG_PPC64 124 unsigned long buid; 125 struct pci_dn *pci_data; 126 #endif /* CONFIG_PPC64 */ 127 128 void *private_data; 129 struct npu *npu; 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 #else /* CONFIG_PPC64 */ 176 177 /* 178 * PCI stuff, for nodes representing PCI devices, pointed to 179 * by device_node->data. 180 */ 181 struct iommu_table; 182 183 struct pci_dn { 184 int flags; 185 #define PCI_DN_FLAG_IOV_VF 0x01 186 #define PCI_DN_FLAG_DEAD 0x02 /* Device has been hot-removed */ 187 188 int busno; /* pci bus number */ 189 int devfn; /* pci device and function number */ 190 int vendor_id; /* Vendor ID */ 191 int device_id; /* Device ID */ 192 int class_code; /* Device class code */ 193 194 struct pci_dn *parent; 195 struct pci_controller *phb; /* for pci devices */ 196 struct iommu_table_group *table_group; /* for phb's or bridges */ 197 198 int pci_ext_config_space; /* for pci devices */ 199 #ifdef CONFIG_EEH 200 struct eeh_dev *edev; /* eeh device */ 201 #endif 202 #define IODA_INVALID_PE 0xFFFFFFFF 203 unsigned int pe_number; 204 #ifdef CONFIG_PCI_IOV 205 u16 vfs_expanded; /* number of VFs IOV BAR expanded */ 206 u16 num_vfs; /* number of VFs enabled*/ 207 unsigned int *pe_num_map; /* PE# for the first VF PE or array */ 208 bool m64_single_mode; /* Use M64 BAR in Single Mode */ 209 #define IODA_INVALID_M64 (-1) 210 int (*m64_map)[PCI_SRIOV_NUM_BARS]; /* Only used on powernv */ 211 int last_allow_rc; /* Only used on pseries */ 212 #endif /* CONFIG_PCI_IOV */ 213 int mps; /* Maximum Payload Size */ 214 struct list_head child_list; 215 struct list_head list; 216 struct resource holes[PCI_SRIOV_NUM_BARS]; 217 }; 218 219 /* Get the pointer to a device_node's pci_dn */ 220 #define PCI_DN(dn) ((struct pci_dn *) (dn)->data) 221 222 extern struct pci_dn *pci_get_pdn_by_devfn(struct pci_bus *bus, 223 int devfn); 224 extern struct pci_dn *pci_get_pdn(struct pci_dev *pdev); 225 extern struct pci_dn *pci_add_device_node_info(struct pci_controller *hose, 226 struct device_node *dn); 227 extern void pci_remove_device_node_info(struct device_node *dn); 228 229 #ifdef CONFIG_PCI_IOV 230 struct pci_dn *add_sriov_vf_pdns(struct pci_dev *pdev); 231 void remove_sriov_vf_pdns(struct pci_dev *pdev); 232 #endif 233 234 static inline int pci_device_from_OF_node(struct device_node *np, 235 u8 *bus, u8 *devfn) 236 { 237 if (!PCI_DN(np)) 238 return -ENODEV; 239 *bus = PCI_DN(np)->busno; 240 *devfn = PCI_DN(np)->devfn; 241 return 0; 242 } 243 244 #if defined(CONFIG_EEH) 245 static inline struct eeh_dev *pdn_to_eeh_dev(struct pci_dn *pdn) 246 { 247 return pdn ? pdn->edev : NULL; 248 } 249 #else 250 #define pdn_to_eeh_dev(x) (NULL) 251 #endif 252 253 /** Find the bus corresponding to the indicated device node */ 254 extern struct pci_bus *pci_find_bus_by_node(struct device_node *dn); 255 256 /** Remove all of the PCI devices under this bus */ 257 extern void pci_hp_remove_devices(struct pci_bus *bus); 258 259 /** Discover new pci devices under this bus, and add them */ 260 extern void pci_hp_add_devices(struct pci_bus *bus); 261 262 extern int pcibios_unmap_io_space(struct pci_bus *bus); 263 extern int pcibios_map_io_space(struct pci_bus *bus); 264 265 #ifdef CONFIG_NUMA 266 #define PHB_SET_NODE(PHB, NODE) ((PHB)->node = (NODE)) 267 #else 268 #define PHB_SET_NODE(PHB, NODE) ((PHB)->node = NUMA_NO_NODE) 269 #endif 270 271 #endif /* CONFIG_PPC64 */ 272 273 /* Get the PCI host controller for an OF device */ 274 extern struct pci_controller *pci_find_hose_for_OF_device( 275 struct device_node* node); 276 277 extern struct pci_controller *pci_find_controller_for_domain(int domain_nr); 278 279 /* Fill up host controller resources from the OF node */ 280 extern void pci_process_bridge_OF_ranges(struct pci_controller *hose, 281 struct device_node *dev, int primary); 282 283 /* Allocate & free a PCI host bridge structure */ 284 extern struct pci_controller *pcibios_alloc_controller(struct device_node *dev); 285 extern void pcibios_free_controller(struct pci_controller *phb); 286 extern void pcibios_free_controller_deferred(struct pci_host_bridge *bridge); 287 288 #ifdef CONFIG_PCI 289 extern int pcibios_vaddr_is_ioport(void __iomem *address); 290 #else 291 static inline int pcibios_vaddr_is_ioport(void __iomem *address) 292 { 293 return 0; 294 } 295 #endif /* CONFIG_PCI */ 296 297 #endif /* __KERNEL__ */ 298 #endif /* _ASM_POWERPC_PCI_BRIDGE_H */ 299