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 * @choose_state: returns PCI power state of given device preferred by the 46 * platform; to be used during system-wide transitions from a 47 * sleeping state to the working state and vice versa 48 * 49 * @sleep_wake: enables/disables the system wake up capability of given device 50 * 51 * @run_wake: enables/disables the platform to generate run-time wake-up events 52 * for given device (the device's wake-up capability has to be 53 * enabled by @sleep_wake for this feature to work) 54 * 55 * @need_resume: returns 'true' if the given device (which is currently 56 * suspended) needs to be resumed to be configured for system 57 * wakeup. 58 * 59 * If given platform is generally capable of power managing PCI devices, all of 60 * these callbacks are mandatory. 61 */ 62 struct pci_platform_pm_ops { 63 bool (*is_manageable)(struct pci_dev *dev); 64 int (*set_state)(struct pci_dev *dev, pci_power_t state); 65 pci_power_t (*choose_state)(struct pci_dev *dev); 66 int (*sleep_wake)(struct pci_dev *dev, bool enable); 67 int (*run_wake)(struct pci_dev *dev, bool enable); 68 bool (*need_resume)(struct pci_dev *dev); 69 }; 70 71 int pci_set_platform_pm(struct pci_platform_pm_ops *ops); 72 void pci_update_current_state(struct pci_dev *dev, pci_power_t state); 73 void pci_power_up(struct pci_dev *dev); 74 void pci_disable_enabled_device(struct pci_dev *dev); 75 int pci_finish_runtime_suspend(struct pci_dev *dev); 76 int __pci_pme_wakeup(struct pci_dev *dev, void *ign); 77 bool pci_dev_keep_suspended(struct pci_dev *dev); 78 void pci_config_pm_runtime_get(struct pci_dev *dev); 79 void pci_config_pm_runtime_put(struct pci_dev *dev); 80 void pci_pm_init(struct pci_dev *dev); 81 void pci_allocate_cap_save_buffers(struct pci_dev *dev); 82 void pci_free_cap_save_buffers(struct pci_dev *dev); 83 84 static inline void pci_wakeup_event(struct pci_dev *dev) 85 { 86 /* Wait 100 ms before the system can be put into a sleep state. */ 87 pm_wakeup_event(&dev->dev, 100); 88 } 89 90 static inline bool pci_has_subordinate(struct pci_dev *pci_dev) 91 { 92 return !!(pci_dev->subordinate); 93 } 94 95 struct pci_vpd_ops { 96 ssize_t (*read)(struct pci_dev *dev, loff_t pos, size_t count, void *buf); 97 ssize_t (*write)(struct pci_dev *dev, loff_t pos, size_t count, const void *buf); 98 void (*release)(struct pci_dev *dev); 99 }; 100 101 struct pci_vpd { 102 unsigned int len; 103 const struct pci_vpd_ops *ops; 104 struct bin_attribute *attr; /* descriptor for sysfs VPD entry */ 105 }; 106 107 int pci_vpd_pci22_init(struct pci_dev *dev); 108 static inline void pci_vpd_release(struct pci_dev *dev) 109 { 110 if (dev->vpd) 111 dev->vpd->ops->release(dev); 112 } 113 114 /* PCI /proc functions */ 115 #ifdef CONFIG_PROC_FS 116 int pci_proc_attach_device(struct pci_dev *dev); 117 int pci_proc_detach_device(struct pci_dev *dev); 118 int pci_proc_detach_bus(struct pci_bus *bus); 119 #else 120 static inline int pci_proc_attach_device(struct pci_dev *dev) { return 0; } 121 static inline int pci_proc_detach_device(struct pci_dev *dev) { return 0; } 122 static inline int pci_proc_detach_bus(struct pci_bus *bus) { return 0; } 123 #endif 124 125 /* Functions for PCI Hotplug drivers to use */ 126 int pci_hp_add_bridge(struct pci_dev *dev); 127 128 #ifdef HAVE_PCI_LEGACY 129 void pci_create_legacy_files(struct pci_bus *bus); 130 void pci_remove_legacy_files(struct pci_bus *bus); 131 #else 132 static inline void pci_create_legacy_files(struct pci_bus *bus) { return; } 133 static inline void pci_remove_legacy_files(struct pci_bus *bus) { return; } 134 #endif 135 136 /* Lock for read/write access to pci device and bus lists */ 137 extern struct rw_semaphore pci_bus_sem; 138 139 extern raw_spinlock_t pci_lock; 140 141 extern unsigned int pci_pm_d3_delay; 142 143 #ifdef CONFIG_PCI_MSI 144 void pci_no_msi(void); 145 void pci_msi_init_pci_dev(struct pci_dev *dev); 146 #else 147 static inline void pci_no_msi(void) { } 148 static inline void pci_msi_init_pci_dev(struct pci_dev *dev) { } 149 #endif 150 151 static inline void pci_msi_set_enable(struct pci_dev *dev, int enable) 152 { 153 u16 control; 154 155 pci_read_config_word(dev, dev->msi_cap + PCI_MSI_FLAGS, &control); 156 control &= ~PCI_MSI_FLAGS_ENABLE; 157 if (enable) 158 control |= PCI_MSI_FLAGS_ENABLE; 159 pci_write_config_word(dev, dev->msi_cap + PCI_MSI_FLAGS, control); 160 } 161 162 static inline void pci_msix_clear_and_set_ctrl(struct pci_dev *dev, u16 clear, u16 set) 163 { 164 u16 ctrl; 165 166 pci_read_config_word(dev, dev->msix_cap + PCI_MSIX_FLAGS, &ctrl); 167 ctrl &= ~clear; 168 ctrl |= set; 169 pci_write_config_word(dev, dev->msix_cap + PCI_MSIX_FLAGS, ctrl); 170 } 171 172 void pci_realloc_get_opt(char *); 173 174 static inline int pci_no_d1d2(struct pci_dev *dev) 175 { 176 unsigned int parent_dstates = 0; 177 178 if (dev->bus->self) 179 parent_dstates = dev->bus->self->no_d1d2; 180 return (dev->no_d1d2 || parent_dstates); 181 182 } 183 extern const struct attribute_group *pci_dev_groups[]; 184 extern const struct attribute_group *pcibus_groups[]; 185 extern struct device_type pci_dev_type; 186 extern const struct attribute_group *pci_bus_groups[]; 187 188 189 /** 190 * pci_match_one_device - Tell if a PCI device structure has a matching 191 * PCI device id structure 192 * @id: single PCI device id structure to match 193 * @dev: the PCI device structure to match against 194 * 195 * Returns the matching pci_device_id structure or %NULL if there is no match. 196 */ 197 static inline const struct pci_device_id * 198 pci_match_one_device(const struct pci_device_id *id, const struct pci_dev *dev) 199 { 200 if ((id->vendor == PCI_ANY_ID || id->vendor == dev->vendor) && 201 (id->device == PCI_ANY_ID || id->device == dev->device) && 202 (id->subvendor == PCI_ANY_ID || id->subvendor == dev->subsystem_vendor) && 203 (id->subdevice == PCI_ANY_ID || id->subdevice == dev->subsystem_device) && 204 !((id->class ^ dev->class) & id->class_mask)) 205 return id; 206 return NULL; 207 } 208 209 /* PCI slot sysfs helper code */ 210 #define to_pci_slot(s) container_of(s, struct pci_slot, kobj) 211 212 extern struct kset *pci_slots_kset; 213 214 struct pci_slot_attribute { 215 struct attribute attr; 216 ssize_t (*show)(struct pci_slot *, char *); 217 ssize_t (*store)(struct pci_slot *, const char *, size_t); 218 }; 219 #define to_pci_slot_attr(s) container_of(s, struct pci_slot_attribute, attr) 220 221 enum pci_bar_type { 222 pci_bar_unknown, /* Standard PCI BAR probe */ 223 pci_bar_io, /* An io port BAR */ 224 pci_bar_mem32, /* A 32-bit memory BAR */ 225 pci_bar_mem64, /* A 64-bit memory BAR */ 226 }; 227 228 bool pci_bus_read_dev_vendor_id(struct pci_bus *bus, int devfn, u32 *pl, 229 int crs_timeout); 230 int pci_setup_device(struct pci_dev *dev); 231 int __pci_read_base(struct pci_dev *dev, enum pci_bar_type type, 232 struct resource *res, unsigned int reg); 233 int pci_resource_bar(struct pci_dev *dev, int resno, enum pci_bar_type *type); 234 void pci_configure_ari(struct pci_dev *dev); 235 void __pci_bus_size_bridges(struct pci_bus *bus, 236 struct list_head *realloc_head); 237 void __pci_bus_assign_resources(const struct pci_bus *bus, 238 struct list_head *realloc_head, 239 struct list_head *fail_head); 240 bool pci_bus_clip_resource(struct pci_dev *dev, int idx); 241 242 void pci_reassigndev_resource_alignment(struct pci_dev *dev); 243 void pci_disable_bridge_window(struct pci_dev *dev); 244 245 /* Single Root I/O Virtualization */ 246 struct pci_sriov { 247 int pos; /* capability position */ 248 int nres; /* number of resources */ 249 u32 cap; /* SR-IOV Capabilities */ 250 u16 ctrl; /* SR-IOV Control */ 251 u16 total_VFs; /* total VFs associated with the PF */ 252 u16 initial_VFs; /* initial VFs associated with the PF */ 253 u16 num_VFs; /* number of VFs available */ 254 u16 offset; /* first VF Routing ID offset */ 255 u16 stride; /* following VF stride */ 256 u32 pgsz; /* page size for BAR alignment */ 257 u8 link; /* Function Dependency Link */ 258 u8 max_VF_buses; /* max buses consumed by VFs */ 259 u16 driver_max_VFs; /* max num VFs driver supports */ 260 struct pci_dev *dev; /* lowest numbered PF */ 261 struct pci_dev *self; /* this PF */ 262 struct mutex lock; /* lock for VF bus */ 263 resource_size_t barsz[PCI_SRIOV_NUM_BARS]; /* VF BAR size */ 264 }; 265 266 #ifdef CONFIG_PCI_ATS 267 void pci_restore_ats_state(struct pci_dev *dev); 268 #else 269 static inline void pci_restore_ats_state(struct pci_dev *dev) 270 { 271 } 272 #endif /* CONFIG_PCI_ATS */ 273 274 #ifdef CONFIG_PCI_IOV 275 int pci_iov_init(struct pci_dev *dev); 276 void pci_iov_release(struct pci_dev *dev); 277 int pci_iov_resource_bar(struct pci_dev *dev, int resno); 278 resource_size_t pci_sriov_resource_alignment(struct pci_dev *dev, int resno); 279 void pci_restore_iov_state(struct pci_dev *dev); 280 int pci_iov_bus_range(struct pci_bus *bus); 281 282 #else 283 static inline int pci_iov_init(struct pci_dev *dev) 284 { 285 return -ENODEV; 286 } 287 static inline void pci_iov_release(struct pci_dev *dev) 288 289 { 290 } 291 static inline int pci_iov_resource_bar(struct pci_dev *dev, int resno) 292 { 293 return 0; 294 } 295 static inline void pci_restore_iov_state(struct pci_dev *dev) 296 { 297 } 298 static inline int pci_iov_bus_range(struct pci_bus *bus) 299 { 300 return 0; 301 } 302 303 #endif /* CONFIG_PCI_IOV */ 304 305 unsigned long pci_cardbus_resource_alignment(struct resource *); 306 307 static inline resource_size_t pci_resource_alignment(struct pci_dev *dev, 308 struct resource *res) 309 { 310 #ifdef CONFIG_PCI_IOV 311 int resno = res - dev->resource; 312 313 if (resno >= PCI_IOV_RESOURCES && resno <= PCI_IOV_RESOURCE_END) 314 return pci_sriov_resource_alignment(dev, resno); 315 #endif 316 if (dev->class >> 8 == PCI_CLASS_BRIDGE_CARDBUS) 317 return pci_cardbus_resource_alignment(res); 318 return resource_alignment(res); 319 } 320 321 void pci_enable_acs(struct pci_dev *dev); 322 323 struct pci_dev_reset_methods { 324 u16 vendor; 325 u16 device; 326 int (*reset)(struct pci_dev *dev, int probe); 327 }; 328 329 #ifdef CONFIG_PCI_QUIRKS 330 int pci_dev_specific_reset(struct pci_dev *dev, int probe); 331 #else 332 static inline int pci_dev_specific_reset(struct pci_dev *dev, int probe) 333 { 334 return -ENOTTY; 335 } 336 #endif 337 338 struct pci_host_bridge *pci_find_host_bridge(struct pci_bus *bus); 339 340 #endif /* DRIVERS_PCI_H */ 341