1 #ifndef DRIVERS_PCI_H 2 #define DRIVERS_PCI_H 3 4 #define PCI_CFG_SPACE_SIZE 256 5 #define PCI_CFG_SPACE_EXP_SIZE 4096 6 7 #define PCI_FIND_CAP_TTL 48 8 9 extern const unsigned char pcie_link_speed[]; 10 11 bool pcie_cap_has_lnkctl(const struct pci_dev *dev); 12 13 /* Functions internal to the PCI core code */ 14 15 int pci_create_sysfs_dev_files(struct pci_dev *pdev); 16 void pci_remove_sysfs_dev_files(struct pci_dev *pdev); 17 #if !defined(CONFIG_DMI) && !defined(CONFIG_ACPI) 18 static inline void pci_create_firmware_label_files(struct pci_dev *pdev) 19 { return; } 20 static inline void pci_remove_firmware_label_files(struct pci_dev *pdev) 21 { return; } 22 #else 23 void pci_create_firmware_label_files(struct pci_dev *pdev); 24 void pci_remove_firmware_label_files(struct pci_dev *pdev); 25 #endif 26 void pci_cleanup_rom(struct pci_dev *dev); 27 #ifdef HAVE_PCI_MMAP 28 enum pci_mmap_api { 29 PCI_MMAP_SYSFS, /* mmap on /sys/bus/pci/devices/<BDF>/resource<N> */ 30 PCI_MMAP_PROCFS /* mmap on /proc/bus/pci/<BDF> */ 31 }; 32 int pci_mmap_fits(struct pci_dev *pdev, int resno, struct vm_area_struct *vmai, 33 enum pci_mmap_api mmap_api); 34 #endif 35 int pci_probe_reset_function(struct pci_dev *dev); 36 37 /** 38 * struct pci_platform_pm_ops - Firmware PM callbacks 39 * 40 * @is_manageable: returns 'true' if given device is power manageable by the 41 * platform firmware 42 * 43 * @set_state: invokes the platform firmware to set the device's power state 44 * 45 * @get_state: queries the platform firmware for a device's current power state 46 * 47 * @choose_state: returns PCI power state of given device preferred by the 48 * platform; to be used during system-wide transitions from a 49 * sleeping state to the working state and vice versa 50 * 51 * @sleep_wake: enables/disables the system wake up capability of given device 52 * 53 * @run_wake: enables/disables the platform to generate run-time wake-up events 54 * for given device (the device's wake-up capability has to be 55 * enabled by @sleep_wake for this feature to work) 56 * 57 * @need_resume: returns 'true' if the given device (which is currently 58 * suspended) needs to be resumed to be configured for system 59 * wakeup. 60 * 61 * If given platform is generally capable of power managing PCI devices, all of 62 * these callbacks are mandatory. 63 */ 64 struct pci_platform_pm_ops { 65 bool (*is_manageable)(struct pci_dev *dev); 66 int (*set_state)(struct pci_dev *dev, pci_power_t state); 67 pci_power_t (*get_state)(struct pci_dev *dev); 68 pci_power_t (*choose_state)(struct pci_dev *dev); 69 int (*sleep_wake)(struct pci_dev *dev, bool enable); 70 int (*run_wake)(struct pci_dev *dev, bool enable); 71 bool (*need_resume)(struct pci_dev *dev); 72 }; 73 74 int pci_set_platform_pm(const struct pci_platform_pm_ops *ops); 75 void pci_update_current_state(struct pci_dev *dev, pci_power_t state); 76 void pci_power_up(struct pci_dev *dev); 77 void pci_disable_enabled_device(struct pci_dev *dev); 78 int pci_finish_runtime_suspend(struct pci_dev *dev); 79 int __pci_pme_wakeup(struct pci_dev *dev, void *ign); 80 bool pci_dev_keep_suspended(struct pci_dev *dev); 81 void pci_dev_complete_resume(struct pci_dev *pci_dev); 82 void pci_config_pm_runtime_get(struct pci_dev *dev); 83 void pci_config_pm_runtime_put(struct pci_dev *dev); 84 void pci_pm_init(struct pci_dev *dev); 85 void pci_ea_init(struct pci_dev *dev); 86 void pci_allocate_cap_save_buffers(struct pci_dev *dev); 87 void pci_free_cap_save_buffers(struct pci_dev *dev); 88 void pci_bridge_d3_device_changed(struct pci_dev *dev); 89 void pci_bridge_d3_device_removed(struct pci_dev *dev); 90 91 static inline void pci_wakeup_event(struct pci_dev *dev) 92 { 93 /* Wait 100 ms before the system can be put into a sleep state. */ 94 pm_wakeup_event(&dev->dev, 100); 95 } 96 97 static inline bool pci_has_subordinate(struct pci_dev *pci_dev) 98 { 99 return !!(pci_dev->subordinate); 100 } 101 102 static inline bool pci_power_manageable(struct pci_dev *pci_dev) 103 { 104 /* 105 * Currently we allow normal PCI devices and PCI bridges transition 106 * into D3 if their bridge_d3 is set. 107 */ 108 return !pci_has_subordinate(pci_dev) || pci_dev->bridge_d3; 109 } 110 111 struct pci_vpd_ops { 112 ssize_t (*read)(struct pci_dev *dev, loff_t pos, size_t count, void *buf); 113 ssize_t (*write)(struct pci_dev *dev, loff_t pos, size_t count, const void *buf); 114 int (*set_size)(struct pci_dev *dev, size_t len); 115 }; 116 117 struct pci_vpd { 118 const struct pci_vpd_ops *ops; 119 struct bin_attribute *attr; /* descriptor for sysfs VPD entry */ 120 struct mutex lock; 121 unsigned int len; 122 u16 flag; 123 u8 cap; 124 u8 busy:1; 125 u8 valid:1; 126 }; 127 128 int pci_vpd_init(struct pci_dev *dev); 129 void pci_vpd_release(struct pci_dev *dev); 130 131 /* PCI /proc functions */ 132 #ifdef CONFIG_PROC_FS 133 int pci_proc_attach_device(struct pci_dev *dev); 134 int pci_proc_detach_device(struct pci_dev *dev); 135 int pci_proc_detach_bus(struct pci_bus *bus); 136 #else 137 static inline int pci_proc_attach_device(struct pci_dev *dev) { return 0; } 138 static inline int pci_proc_detach_device(struct pci_dev *dev) { return 0; } 139 static inline int pci_proc_detach_bus(struct pci_bus *bus) { return 0; } 140 #endif 141 142 /* Functions for PCI Hotplug drivers to use */ 143 int pci_hp_add_bridge(struct pci_dev *dev); 144 145 #ifdef HAVE_PCI_LEGACY 146 void pci_create_legacy_files(struct pci_bus *bus); 147 void pci_remove_legacy_files(struct pci_bus *bus); 148 #else 149 static inline void pci_create_legacy_files(struct pci_bus *bus) { return; } 150 static inline void pci_remove_legacy_files(struct pci_bus *bus) { return; } 151 #endif 152 153 /* Lock for read/write access to pci device and bus lists */ 154 extern struct rw_semaphore pci_bus_sem; 155 156 extern raw_spinlock_t pci_lock; 157 158 extern unsigned int pci_pm_d3_delay; 159 160 #ifdef CONFIG_PCI_MSI 161 void pci_no_msi(void); 162 #else 163 static inline void pci_no_msi(void) { } 164 #endif 165 166 static inline void pci_msi_set_enable(struct pci_dev *dev, int enable) 167 { 168 u16 control; 169 170 pci_read_config_word(dev, dev->msi_cap + PCI_MSI_FLAGS, &control); 171 control &= ~PCI_MSI_FLAGS_ENABLE; 172 if (enable) 173 control |= PCI_MSI_FLAGS_ENABLE; 174 pci_write_config_word(dev, dev->msi_cap + PCI_MSI_FLAGS, control); 175 } 176 177 static inline void pci_msix_clear_and_set_ctrl(struct pci_dev *dev, u16 clear, u16 set) 178 { 179 u16 ctrl; 180 181 pci_read_config_word(dev, dev->msix_cap + PCI_MSIX_FLAGS, &ctrl); 182 ctrl &= ~clear; 183 ctrl |= set; 184 pci_write_config_word(dev, dev->msix_cap + PCI_MSIX_FLAGS, ctrl); 185 } 186 187 void pci_realloc_get_opt(char *); 188 189 static inline int pci_no_d1d2(struct pci_dev *dev) 190 { 191 unsigned int parent_dstates = 0; 192 193 if (dev->bus->self) 194 parent_dstates = dev->bus->self->no_d1d2; 195 return (dev->no_d1d2 || parent_dstates); 196 197 } 198 extern const struct attribute_group *pci_dev_groups[]; 199 extern const struct attribute_group *pcibus_groups[]; 200 extern struct device_type pci_dev_type; 201 extern const struct attribute_group *pci_bus_groups[]; 202 203 204 /** 205 * pci_match_one_device - Tell if a PCI device structure has a matching 206 * PCI device id structure 207 * @id: single PCI device id structure to match 208 * @dev: the PCI device structure to match against 209 * 210 * Returns the matching pci_device_id structure or %NULL if there is no match. 211 */ 212 static inline const struct pci_device_id * 213 pci_match_one_device(const struct pci_device_id *id, const struct pci_dev *dev) 214 { 215 if ((id->vendor == PCI_ANY_ID || id->vendor == dev->vendor) && 216 (id->device == PCI_ANY_ID || id->device == dev->device) && 217 (id->subvendor == PCI_ANY_ID || id->subvendor == dev->subsystem_vendor) && 218 (id->subdevice == PCI_ANY_ID || id->subdevice == dev->subsystem_device) && 219 !((id->class ^ dev->class) & id->class_mask)) 220 return id; 221 return NULL; 222 } 223 224 /* PCI slot sysfs helper code */ 225 #define to_pci_slot(s) container_of(s, struct pci_slot, kobj) 226 227 extern struct kset *pci_slots_kset; 228 229 struct pci_slot_attribute { 230 struct attribute attr; 231 ssize_t (*show)(struct pci_slot *, char *); 232 ssize_t (*store)(struct pci_slot *, const char *, size_t); 233 }; 234 #define to_pci_slot_attr(s) container_of(s, struct pci_slot_attribute, attr) 235 236 enum pci_bar_type { 237 pci_bar_unknown, /* Standard PCI BAR probe */ 238 pci_bar_io, /* An io port BAR */ 239 pci_bar_mem32, /* A 32-bit memory BAR */ 240 pci_bar_mem64, /* A 64-bit memory BAR */ 241 }; 242 243 bool pci_bus_read_dev_vendor_id(struct pci_bus *bus, int devfn, u32 *pl, 244 int crs_timeout); 245 int pci_setup_device(struct pci_dev *dev); 246 int __pci_read_base(struct pci_dev *dev, enum pci_bar_type type, 247 struct resource *res, unsigned int reg); 248 int pci_resource_bar(struct pci_dev *dev, int resno, enum pci_bar_type *type); 249 void pci_configure_ari(struct pci_dev *dev); 250 void __pci_bus_size_bridges(struct pci_bus *bus, 251 struct list_head *realloc_head); 252 void __pci_bus_assign_resources(const struct pci_bus *bus, 253 struct list_head *realloc_head, 254 struct list_head *fail_head); 255 bool pci_bus_clip_resource(struct pci_dev *dev, int idx); 256 257 void pci_reassigndev_resource_alignment(struct pci_dev *dev); 258 void pci_disable_bridge_window(struct pci_dev *dev); 259 260 /* Single Root I/O Virtualization */ 261 struct pci_sriov { 262 int pos; /* capability position */ 263 int nres; /* number of resources */ 264 u32 cap; /* SR-IOV Capabilities */ 265 u16 ctrl; /* SR-IOV Control */ 266 u16 total_VFs; /* total VFs associated with the PF */ 267 u16 initial_VFs; /* initial VFs associated with the PF */ 268 u16 num_VFs; /* number of VFs available */ 269 u16 offset; /* first VF Routing ID offset */ 270 u16 stride; /* following VF stride */ 271 u32 pgsz; /* page size for BAR alignment */ 272 u8 link; /* Function Dependency Link */ 273 u8 max_VF_buses; /* max buses consumed by VFs */ 274 u16 driver_max_VFs; /* max num VFs driver supports */ 275 struct pci_dev *dev; /* lowest numbered PF */ 276 struct pci_dev *self; /* this PF */ 277 struct mutex lock; /* lock for VF bus */ 278 resource_size_t barsz[PCI_SRIOV_NUM_BARS]; /* VF BAR size */ 279 }; 280 281 #ifdef CONFIG_PCI_ATS 282 void pci_restore_ats_state(struct pci_dev *dev); 283 #else 284 static inline void pci_restore_ats_state(struct pci_dev *dev) 285 { 286 } 287 #endif /* CONFIG_PCI_ATS */ 288 289 #ifdef CONFIG_PCI_IOV 290 int pci_iov_init(struct pci_dev *dev); 291 void pci_iov_release(struct pci_dev *dev); 292 int pci_iov_resource_bar(struct pci_dev *dev, int resno); 293 resource_size_t pci_sriov_resource_alignment(struct pci_dev *dev, int resno); 294 void pci_restore_iov_state(struct pci_dev *dev); 295 int pci_iov_bus_range(struct pci_bus *bus); 296 297 #else 298 static inline int pci_iov_init(struct pci_dev *dev) 299 { 300 return -ENODEV; 301 } 302 static inline void pci_iov_release(struct pci_dev *dev) 303 304 { 305 } 306 static inline int pci_iov_resource_bar(struct pci_dev *dev, int resno) 307 { 308 return 0; 309 } 310 static inline void pci_restore_iov_state(struct pci_dev *dev) 311 { 312 } 313 static inline int pci_iov_bus_range(struct pci_bus *bus) 314 { 315 return 0; 316 } 317 318 #endif /* CONFIG_PCI_IOV */ 319 320 unsigned long pci_cardbus_resource_alignment(struct resource *); 321 322 static inline resource_size_t pci_resource_alignment(struct pci_dev *dev, 323 struct resource *res) 324 { 325 #ifdef CONFIG_PCI_IOV 326 int resno = res - dev->resource; 327 328 if (resno >= PCI_IOV_RESOURCES && resno <= PCI_IOV_RESOURCE_END) 329 return pci_sriov_resource_alignment(dev, resno); 330 #endif 331 if (dev->class >> 8 == PCI_CLASS_BRIDGE_CARDBUS) 332 return pci_cardbus_resource_alignment(res); 333 return resource_alignment(res); 334 } 335 336 void pci_enable_acs(struct pci_dev *dev); 337 338 #ifdef CONFIG_PCIE_PTM 339 void pci_ptm_init(struct pci_dev *dev); 340 #else 341 static inline void pci_ptm_init(struct pci_dev *dev) { } 342 #endif 343 344 struct pci_dev_reset_methods { 345 u16 vendor; 346 u16 device; 347 int (*reset)(struct pci_dev *dev, int probe); 348 }; 349 350 #ifdef CONFIG_PCI_QUIRKS 351 int pci_dev_specific_reset(struct pci_dev *dev, int probe); 352 #else 353 static inline int pci_dev_specific_reset(struct pci_dev *dev, int probe) 354 { 355 return -ENOTTY; 356 } 357 #endif 358 359 #endif /* DRIVERS_PCI_H */ 360