1 #ifndef DRIVERS_PCI_H 2 #define DRIVERS_PCI_H 3 4 #include <linux/workqueue.h> 5 6 #define PCI_CFG_SPACE_SIZE 256 7 #define PCI_CFG_SPACE_EXP_SIZE 4096 8 9 extern const unsigned char pcix_bus_speed[]; 10 extern const unsigned char pcie_link_speed[]; 11 12 /* Functions internal to the PCI core code */ 13 14 int pci_create_sysfs_dev_files(struct pci_dev *pdev); 15 void pci_remove_sysfs_dev_files(struct pci_dev *pdev); 16 #if !defined(CONFIG_DMI) && !defined(CONFIG_ACPI) 17 static inline void pci_create_firmware_label_files(struct pci_dev *pdev) 18 { return; } 19 static inline void pci_remove_firmware_label_files(struct pci_dev *pdev) 20 { return; } 21 #else 22 void pci_create_firmware_label_files(struct pci_dev *pdev); 23 void pci_remove_firmware_label_files(struct pci_dev *pdev); 24 #endif 25 void pci_cleanup_rom(struct pci_dev *dev); 26 #ifdef HAVE_PCI_MMAP 27 enum pci_mmap_api { 28 PCI_MMAP_SYSFS, /* mmap on /sys/bus/pci/devices/<BDF>/resource<N> */ 29 PCI_MMAP_PROCFS /* mmap on /proc/bus/pci/<BDF> */ 30 }; 31 int pci_mmap_fits(struct pci_dev *pdev, int resno, struct vm_area_struct *vmai, 32 enum pci_mmap_api mmap_api); 33 #endif 34 int pci_probe_reset_function(struct pci_dev *dev); 35 36 /** 37 * struct pci_platform_pm_ops - Firmware PM callbacks 38 * 39 * @is_manageable: returns 'true' if given device is power manageable by the 40 * platform firmware 41 * 42 * @set_state: invokes the platform firmware to set the device's power state 43 * 44 * @choose_state: returns PCI power state of given device preferred by the 45 * platform; to be used during system-wide transitions from a 46 * sleeping state to the working state and vice versa 47 * 48 * @sleep_wake: enables/disables the system wake up capability of given device 49 * 50 * @run_wake: enables/disables the platform to generate run-time wake-up events 51 * for given device (the device's wake-up capability has to be 52 * enabled by @sleep_wake for this feature to work) 53 * 54 * If given platform is generally capable of power managing PCI devices, all of 55 * these callbacks are mandatory. 56 */ 57 struct pci_platform_pm_ops { 58 bool (*is_manageable)(struct pci_dev *dev); 59 int (*set_state)(struct pci_dev *dev, pci_power_t state); 60 pci_power_t (*choose_state)(struct pci_dev *dev); 61 int (*sleep_wake)(struct pci_dev *dev, bool enable); 62 int (*run_wake)(struct pci_dev *dev, bool enable); 63 }; 64 65 int pci_set_platform_pm(struct pci_platform_pm_ops *ops); 66 void pci_update_current_state(struct pci_dev *dev, pci_power_t state); 67 void pci_power_up(struct pci_dev *dev); 68 void pci_disable_enabled_device(struct pci_dev *dev); 69 int pci_finish_runtime_suspend(struct pci_dev *dev); 70 int __pci_pme_wakeup(struct pci_dev *dev, void *ign); 71 void pci_wakeup_bus(struct pci_bus *bus); 72 void pci_config_pm_runtime_get(struct pci_dev *dev); 73 void pci_config_pm_runtime_put(struct pci_dev *dev); 74 void pci_pm_init(struct pci_dev *dev); 75 void pci_allocate_cap_save_buffers(struct pci_dev *dev); 76 void pci_free_cap_save_buffers(struct pci_dev *dev); 77 78 static inline void pci_wakeup_event(struct pci_dev *dev) 79 { 80 /* Wait 100 ms before the system can be put into a sleep state. */ 81 pm_wakeup_event(&dev->dev, 100); 82 } 83 84 static inline bool pci_is_bridge(struct pci_dev *pci_dev) 85 { 86 return !!(pci_dev->subordinate); 87 } 88 89 struct pci_vpd_ops { 90 ssize_t (*read)(struct pci_dev *dev, loff_t pos, size_t count, void *buf); 91 ssize_t (*write)(struct pci_dev *dev, loff_t pos, size_t count, const void *buf); 92 void (*release)(struct pci_dev *dev); 93 }; 94 95 struct pci_vpd { 96 unsigned int len; 97 const struct pci_vpd_ops *ops; 98 struct bin_attribute *attr; /* descriptor for sysfs VPD entry */ 99 }; 100 101 int pci_vpd_pci22_init(struct pci_dev *dev); 102 static inline void pci_vpd_release(struct pci_dev *dev) 103 { 104 if (dev->vpd) 105 dev->vpd->ops->release(dev); 106 } 107 108 /* PCI /proc functions */ 109 #ifdef CONFIG_PROC_FS 110 int pci_proc_attach_device(struct pci_dev *dev); 111 int pci_proc_detach_device(struct pci_dev *dev); 112 int pci_proc_detach_bus(struct pci_bus *bus); 113 #else 114 static inline int pci_proc_attach_device(struct pci_dev *dev) { return 0; } 115 static inline int pci_proc_detach_device(struct pci_dev *dev) { return 0; } 116 static inline int pci_proc_detach_bus(struct pci_bus *bus) { return 0; } 117 #endif 118 119 /* Functions for PCI Hotplug drivers to use */ 120 int pci_hp_add_bridge(struct pci_dev *dev); 121 122 #ifdef HAVE_PCI_LEGACY 123 void pci_create_legacy_files(struct pci_bus *bus); 124 void pci_remove_legacy_files(struct pci_bus *bus); 125 #else 126 static inline void pci_create_legacy_files(struct pci_bus *bus) { return; } 127 static inline void pci_remove_legacy_files(struct pci_bus *bus) { return; } 128 #endif 129 130 /* Lock for read/write access to pci device and bus lists */ 131 extern struct rw_semaphore pci_bus_sem; 132 133 extern raw_spinlock_t pci_lock; 134 135 extern unsigned int pci_pm_d3_delay; 136 137 #ifdef CONFIG_PCI_MSI 138 void pci_no_msi(void); 139 void pci_msi_init_pci_dev(struct pci_dev *dev); 140 #else 141 static inline void pci_no_msi(void) { } 142 static inline void pci_msi_init_pci_dev(struct pci_dev *dev) { } 143 #endif 144 145 void pci_realloc_get_opt(char *); 146 147 static inline int pci_no_d1d2(struct pci_dev *dev) 148 { 149 unsigned int parent_dstates = 0; 150 151 if (dev->bus->self) 152 parent_dstates = dev->bus->self->no_d1d2; 153 return (dev->no_d1d2 || parent_dstates); 154 155 } 156 extern struct device_attribute pci_dev_attrs[]; 157 extern const struct attribute_group *pcibus_groups[]; 158 extern struct device_type pci_dev_type; 159 extern struct bus_attribute pci_bus_attrs[]; 160 161 162 /** 163 * pci_match_one_device - Tell if a PCI device structure has a matching 164 * PCI device id structure 165 * @id: single PCI device id structure to match 166 * @dev: the PCI device structure to match against 167 * 168 * Returns the matching pci_device_id structure or %NULL if there is no match. 169 */ 170 static inline const struct pci_device_id * 171 pci_match_one_device(const struct pci_device_id *id, const struct pci_dev *dev) 172 { 173 if ((id->vendor == PCI_ANY_ID || id->vendor == dev->vendor) && 174 (id->device == PCI_ANY_ID || id->device == dev->device) && 175 (id->subvendor == PCI_ANY_ID || id->subvendor == dev->subsystem_vendor) && 176 (id->subdevice == PCI_ANY_ID || id->subdevice == dev->subsystem_device) && 177 !((id->class ^ dev->class) & id->class_mask)) 178 return id; 179 return NULL; 180 } 181 182 /* PCI slot sysfs helper code */ 183 #define to_pci_slot(s) container_of(s, struct pci_slot, kobj) 184 185 extern struct kset *pci_slots_kset; 186 187 struct pci_slot_attribute { 188 struct attribute attr; 189 ssize_t (*show)(struct pci_slot *, char *); 190 ssize_t (*store)(struct pci_slot *, const char *, size_t); 191 }; 192 #define to_pci_slot_attr(s) container_of(s, struct pci_slot_attribute, attr) 193 194 enum pci_bar_type { 195 pci_bar_unknown, /* Standard PCI BAR probe */ 196 pci_bar_io, /* An io port BAR */ 197 pci_bar_mem32, /* A 32-bit memory BAR */ 198 pci_bar_mem64, /* A 64-bit memory BAR */ 199 }; 200 201 bool pci_bus_read_dev_vendor_id(struct pci_bus *bus, int devfn, u32 *pl, 202 int crs_timeout); 203 int pci_setup_device(struct pci_dev *dev); 204 int __pci_read_base(struct pci_dev *dev, enum pci_bar_type type, 205 struct resource *res, unsigned int reg); 206 int pci_resource_bar(struct pci_dev *dev, int resno, enum pci_bar_type *type); 207 void pci_configure_ari(struct pci_dev *dev); 208 void __ref __pci_bus_size_bridges(struct pci_bus *bus, 209 struct list_head *realloc_head); 210 void __ref __pci_bus_assign_resources(const struct pci_bus *bus, 211 struct list_head *realloc_head, 212 struct list_head *fail_head); 213 214 /** 215 * pci_ari_enabled - query ARI forwarding status 216 * @bus: the PCI bus 217 * 218 * Returns 1 if ARI forwarding is enabled, or 0 if not enabled; 219 */ 220 static inline int pci_ari_enabled(struct pci_bus *bus) 221 { 222 return bus->self && bus->self->ari_enabled; 223 } 224 225 void pci_reassigndev_resource_alignment(struct pci_dev *dev); 226 void pci_disable_bridge_window(struct pci_dev *dev); 227 228 /* Single Root I/O Virtualization */ 229 struct pci_sriov { 230 int pos; /* capability position */ 231 int nres; /* number of resources */ 232 u32 cap; /* SR-IOV Capabilities */ 233 u16 ctrl; /* SR-IOV Control */ 234 u16 total_VFs; /* total VFs associated with the PF */ 235 u16 initial_VFs; /* initial VFs associated with the PF */ 236 u16 num_VFs; /* number of VFs available */ 237 u16 offset; /* first VF Routing ID offset */ 238 u16 stride; /* following VF stride */ 239 u32 pgsz; /* page size for BAR alignment */ 240 u8 link; /* Function Dependency Link */ 241 u16 driver_max_VFs; /* max num VFs driver supports */ 242 struct pci_dev *dev; /* lowest numbered PF */ 243 struct pci_dev *self; /* this PF */ 244 struct mutex lock; /* lock for VF bus */ 245 struct work_struct mtask; /* VF Migration task */ 246 u8 __iomem *mstate; /* VF Migration State Array */ 247 }; 248 249 #ifdef CONFIG_PCI_ATS 250 void pci_restore_ats_state(struct pci_dev *dev); 251 #else 252 static inline void pci_restore_ats_state(struct pci_dev *dev) 253 { 254 } 255 #endif /* CONFIG_PCI_ATS */ 256 257 #ifdef CONFIG_PCI_IOV 258 int pci_iov_init(struct pci_dev *dev); 259 void pci_iov_release(struct pci_dev *dev); 260 int pci_iov_resource_bar(struct pci_dev *dev, int resno, 261 enum pci_bar_type *type); 262 resource_size_t pci_sriov_resource_alignment(struct pci_dev *dev, int resno); 263 void pci_restore_iov_state(struct pci_dev *dev); 264 int pci_iov_bus_range(struct pci_bus *bus); 265 266 #else 267 static inline int pci_iov_init(struct pci_dev *dev) 268 { 269 return -ENODEV; 270 } 271 static inline void pci_iov_release(struct pci_dev *dev) 272 273 { 274 } 275 static inline int pci_iov_resource_bar(struct pci_dev *dev, int resno, 276 enum pci_bar_type *type) 277 { 278 return 0; 279 } 280 static inline void pci_restore_iov_state(struct pci_dev *dev) 281 { 282 } 283 static inline int pci_iov_bus_range(struct pci_bus *bus) 284 { 285 return 0; 286 } 287 288 #endif /* CONFIG_PCI_IOV */ 289 290 unsigned long pci_cardbus_resource_alignment(struct resource *); 291 292 static inline resource_size_t pci_resource_alignment(struct pci_dev *dev, 293 struct resource *res) 294 { 295 #ifdef CONFIG_PCI_IOV 296 int resno = res - dev->resource; 297 298 if (resno >= PCI_IOV_RESOURCES && resno <= PCI_IOV_RESOURCE_END) 299 return pci_sriov_resource_alignment(dev, resno); 300 #endif 301 if (dev->class >> 8 == PCI_CLASS_BRIDGE_CARDBUS) 302 return pci_cardbus_resource_alignment(res); 303 return resource_alignment(res); 304 } 305 306 void pci_enable_acs(struct pci_dev *dev); 307 308 struct pci_dev_reset_methods { 309 u16 vendor; 310 u16 device; 311 int (*reset)(struct pci_dev *dev, int probe); 312 }; 313 314 #ifdef CONFIG_PCI_QUIRKS 315 int pci_dev_specific_reset(struct pci_dev *dev, int probe); 316 #else 317 static inline int pci_dev_specific_reset(struct pci_dev *dev, int probe) 318 { 319 return -ENOTTY; 320 } 321 #endif 322 323 #endif /* DRIVERS_PCI_H */ 324