Linux 4.16.11
[linux/fpc-iii.git] / drivers / pci / pci.h
blobfcd81911b1278486572a2845a2cdbe9829d1ad99
1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef DRIVERS_PCI_H
3 #define DRIVERS_PCI_H
5 #define PCI_FIND_CAP_TTL 48
7 #define PCI_VSEC_ID_INTEL_TBT 0x1234 /* Thunderbolt */
9 extern const unsigned char pcie_link_speed[];
11 bool pcie_cap_has_lnkctl(const struct pci_dev *dev);
13 /* Functions internal to the PCI core code */
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);
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> */
32 int pci_mmap_fits(struct pci_dev *pdev, int resno, struct vm_area_struct *vmai,
33 enum pci_mmap_api mmap_api);
35 int pci_probe_reset_function(struct pci_dev *dev);
37 /**
38 * struct pci_platform_pm_ops - Firmware PM callbacks
40 * @is_manageable: returns 'true' if given device is power manageable by the
41 * platform firmware
43 * @set_state: invokes the platform firmware to set the device's power state
45 * @get_state: queries the platform firmware for a device's current power state
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
51 * @set_wakeup: enables/disables wakeup capability for the device
53 * @need_resume: returns 'true' if the given device (which is currently
54 * suspended) needs to be resumed to be configured for system
55 * wakeup.
57 * If given platform is generally capable of power managing PCI devices, all of
58 * these callbacks are mandatory.
60 struct pci_platform_pm_ops {
61 bool (*is_manageable)(struct pci_dev *dev);
62 int (*set_state)(struct pci_dev *dev, pci_power_t state);
63 pci_power_t (*get_state)(struct pci_dev *dev);
64 pci_power_t (*choose_state)(struct pci_dev *dev);
65 int (*set_wakeup)(struct pci_dev *dev, bool enable);
66 bool (*need_resume)(struct pci_dev *dev);
69 int pci_set_platform_pm(const struct pci_platform_pm_ops *ops);
70 void pci_update_current_state(struct pci_dev *dev, pci_power_t state);
71 void pci_power_up(struct pci_dev *dev);
72 void pci_disable_enabled_device(struct pci_dev *dev);
73 int pci_finish_runtime_suspend(struct pci_dev *dev);
74 int __pci_pme_wakeup(struct pci_dev *dev, void *ign);
75 void pci_pme_restore(struct pci_dev *dev);
76 bool pci_dev_keep_suspended(struct pci_dev *dev);
77 void pci_dev_complete_resume(struct pci_dev *pci_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_ea_init(struct pci_dev *dev);
82 void pci_allocate_cap_save_buffers(struct pci_dev *dev);
83 void pci_free_cap_save_buffers(struct pci_dev *dev);
84 bool pci_bridge_d3_possible(struct pci_dev *dev);
85 void pci_bridge_d3_update(struct pci_dev *dev);
87 static inline void pci_wakeup_event(struct pci_dev *dev)
89 /* Wait 100 ms before the system can be put into a sleep state. */
90 pm_wakeup_event(&dev->dev, 100);
93 static inline bool pci_has_subordinate(struct pci_dev *pci_dev)
95 return !!(pci_dev->subordinate);
98 static inline bool pci_power_manageable(struct pci_dev *pci_dev)
101 * Currently we allow normal PCI devices and PCI bridges transition
102 * into D3 if their bridge_d3 is set.
104 return !pci_has_subordinate(pci_dev) || pci_dev->bridge_d3;
107 struct pci_vpd_ops {
108 ssize_t (*read)(struct pci_dev *dev, loff_t pos, size_t count, void *buf);
109 ssize_t (*write)(struct pci_dev *dev, loff_t pos, size_t count, const void *buf);
110 int (*set_size)(struct pci_dev *dev, size_t len);
113 struct pci_vpd {
114 const struct pci_vpd_ops *ops;
115 struct bin_attribute *attr; /* Descriptor for sysfs VPD entry */
116 struct mutex lock;
117 unsigned int len;
118 u16 flag;
119 u8 cap;
120 u8 busy:1;
121 u8 valid:1;
124 int pci_vpd_init(struct pci_dev *dev);
125 void pci_vpd_release(struct pci_dev *dev);
127 /* PCI /proc functions */
128 #ifdef CONFIG_PROC_FS
129 int pci_proc_attach_device(struct pci_dev *dev);
130 int pci_proc_detach_device(struct pci_dev *dev);
131 int pci_proc_detach_bus(struct pci_bus *bus);
132 #else
133 static inline int pci_proc_attach_device(struct pci_dev *dev) { return 0; }
134 static inline int pci_proc_detach_device(struct pci_dev *dev) { return 0; }
135 static inline int pci_proc_detach_bus(struct pci_bus *bus) { return 0; }
136 #endif
138 /* Functions for PCI Hotplug drivers to use */
139 int pci_hp_add_bridge(struct pci_dev *dev);
141 #ifdef HAVE_PCI_LEGACY
142 void pci_create_legacy_files(struct pci_bus *bus);
143 void pci_remove_legacy_files(struct pci_bus *bus);
144 #else
145 static inline void pci_create_legacy_files(struct pci_bus *bus) { return; }
146 static inline void pci_remove_legacy_files(struct pci_bus *bus) { return; }
147 #endif
149 /* Lock for read/write access to pci device and bus lists */
150 extern struct rw_semaphore pci_bus_sem;
152 extern raw_spinlock_t pci_lock;
154 extern unsigned int pci_pm_d3_delay;
156 #ifdef CONFIG_PCI_MSI
157 void pci_no_msi(void);
158 #else
159 static inline void pci_no_msi(void) { }
160 #endif
162 static inline void pci_msi_set_enable(struct pci_dev *dev, int enable)
164 u16 control;
166 pci_read_config_word(dev, dev->msi_cap + PCI_MSI_FLAGS, &control);
167 control &= ~PCI_MSI_FLAGS_ENABLE;
168 if (enable)
169 control |= PCI_MSI_FLAGS_ENABLE;
170 pci_write_config_word(dev, dev->msi_cap + PCI_MSI_FLAGS, control);
173 static inline void pci_msix_clear_and_set_ctrl(struct pci_dev *dev, u16 clear, u16 set)
175 u16 ctrl;
177 pci_read_config_word(dev, dev->msix_cap + PCI_MSIX_FLAGS, &ctrl);
178 ctrl &= ~clear;
179 ctrl |= set;
180 pci_write_config_word(dev, dev->msix_cap + PCI_MSIX_FLAGS, ctrl);
183 void pci_realloc_get_opt(char *);
185 static inline int pci_no_d1d2(struct pci_dev *dev)
187 unsigned int parent_dstates = 0;
189 if (dev->bus->self)
190 parent_dstates = dev->bus->self->no_d1d2;
191 return (dev->no_d1d2 || parent_dstates);
194 extern const struct attribute_group *pci_dev_groups[];
195 extern const struct attribute_group *pcibus_groups[];
196 extern const struct device_type pci_dev_type;
197 extern const struct attribute_group *pci_bus_groups[];
201 * pci_match_one_device - Tell if a PCI device structure has a matching
202 * PCI device id structure
203 * @id: single PCI device id structure to match
204 * @dev: the PCI device structure to match against
206 * Returns the matching pci_device_id structure or %NULL if there is no match.
208 static inline const struct pci_device_id *
209 pci_match_one_device(const struct pci_device_id *id, const struct pci_dev *dev)
211 if ((id->vendor == PCI_ANY_ID || id->vendor == dev->vendor) &&
212 (id->device == PCI_ANY_ID || id->device == dev->device) &&
213 (id->subvendor == PCI_ANY_ID || id->subvendor == dev->subsystem_vendor) &&
214 (id->subdevice == PCI_ANY_ID || id->subdevice == dev->subsystem_device) &&
215 !((id->class ^ dev->class) & id->class_mask))
216 return id;
217 return NULL;
220 /* PCI slot sysfs helper code */
221 #define to_pci_slot(s) container_of(s, struct pci_slot, kobj)
223 extern struct kset *pci_slots_kset;
225 struct pci_slot_attribute {
226 struct attribute attr;
227 ssize_t (*show)(struct pci_slot *, char *);
228 ssize_t (*store)(struct pci_slot *, const char *, size_t);
230 #define to_pci_slot_attr(s) container_of(s, struct pci_slot_attribute, attr)
232 enum pci_bar_type {
233 pci_bar_unknown, /* Standard PCI BAR probe */
234 pci_bar_io, /* An I/O port BAR */
235 pci_bar_mem32, /* A 32-bit memory BAR */
236 pci_bar_mem64, /* A 64-bit memory BAR */
239 int pci_configure_extended_tags(struct pci_dev *dev, void *ign);
240 bool pci_bus_read_dev_vendor_id(struct pci_bus *bus, int devfn, u32 *pl,
241 int crs_timeout);
242 int pci_setup_device(struct pci_dev *dev);
243 int __pci_read_base(struct pci_dev *dev, enum pci_bar_type type,
244 struct resource *res, unsigned int reg);
245 void pci_configure_ari(struct pci_dev *dev);
246 void __pci_bus_size_bridges(struct pci_bus *bus,
247 struct list_head *realloc_head);
248 void __pci_bus_assign_resources(const struct pci_bus *bus,
249 struct list_head *realloc_head,
250 struct list_head *fail_head);
251 bool pci_bus_clip_resource(struct pci_dev *dev, int idx);
253 void pci_reassigndev_resource_alignment(struct pci_dev *dev);
254 void pci_disable_bridge_window(struct pci_dev *dev);
256 /* Single Root I/O Virtualization */
257 struct pci_sriov {
258 int pos; /* Capability position */
259 int nres; /* Number of resources */
260 u32 cap; /* SR-IOV Capabilities */
261 u16 ctrl; /* SR-IOV Control */
262 u16 total_VFs; /* Total VFs associated with the PF */
263 u16 initial_VFs; /* Initial VFs associated with the PF */
264 u16 num_VFs; /* Number of VFs available */
265 u16 offset; /* First VF Routing ID offset */
266 u16 stride; /* Following VF stride */
267 u16 vf_device; /* VF device ID */
268 u32 pgsz; /* Page size for BAR alignment */
269 u8 link; /* Function Dependency Link */
270 u8 max_VF_buses; /* Max buses consumed by VFs */
271 u16 driver_max_VFs; /* Max num VFs driver supports */
272 struct pci_dev *dev; /* Lowest numbered PF */
273 struct pci_dev *self; /* This PF */
274 resource_size_t barsz[PCI_SRIOV_NUM_BARS]; /* VF BAR size */
275 bool drivers_autoprobe; /* Auto probing of VFs by driver */
278 /* pci_dev priv_flags */
279 #define PCI_DEV_DISCONNECTED 0
281 static inline int pci_dev_set_disconnected(struct pci_dev *dev, void *unused)
283 set_bit(PCI_DEV_DISCONNECTED, &dev->priv_flags);
284 return 0;
287 static inline bool pci_dev_is_disconnected(const struct pci_dev *dev)
289 return test_bit(PCI_DEV_DISCONNECTED, &dev->priv_flags);
292 #ifdef CONFIG_PCI_ATS
293 void pci_restore_ats_state(struct pci_dev *dev);
294 #else
295 static inline void pci_restore_ats_state(struct pci_dev *dev)
298 #endif /* CONFIG_PCI_ATS */
300 #ifdef CONFIG_PCI_IOV
301 int pci_iov_init(struct pci_dev *dev);
302 void pci_iov_release(struct pci_dev *dev);
303 void pci_iov_update_resource(struct pci_dev *dev, int resno);
304 resource_size_t pci_sriov_resource_alignment(struct pci_dev *dev, int resno);
305 void pci_restore_iov_state(struct pci_dev *dev);
306 int pci_iov_bus_range(struct pci_bus *bus);
308 #else
309 static inline int pci_iov_init(struct pci_dev *dev)
311 return -ENODEV;
313 static inline void pci_iov_release(struct pci_dev *dev)
317 static inline void pci_restore_iov_state(struct pci_dev *dev)
320 static inline int pci_iov_bus_range(struct pci_bus *bus)
322 return 0;
325 #endif /* CONFIG_PCI_IOV */
327 unsigned long pci_cardbus_resource_alignment(struct resource *);
329 static inline resource_size_t pci_resource_alignment(struct pci_dev *dev,
330 struct resource *res)
332 #ifdef CONFIG_PCI_IOV
333 int resno = res - dev->resource;
335 if (resno >= PCI_IOV_RESOURCES && resno <= PCI_IOV_RESOURCE_END)
336 return pci_sriov_resource_alignment(dev, resno);
337 #endif
338 if (dev->class >> 8 == PCI_CLASS_BRIDGE_CARDBUS)
339 return pci_cardbus_resource_alignment(res);
340 return resource_alignment(res);
343 void pci_enable_acs(struct pci_dev *dev);
345 #ifdef CONFIG_PCIEASPM
346 void pcie_aspm_init_link_state(struct pci_dev *pdev);
347 void pcie_aspm_exit_link_state(struct pci_dev *pdev);
348 void pcie_aspm_pm_state_change(struct pci_dev *pdev);
349 void pcie_aspm_powersave_config_link(struct pci_dev *pdev);
350 #else
351 static inline void pcie_aspm_init_link_state(struct pci_dev *pdev) { }
352 static inline void pcie_aspm_exit_link_state(struct pci_dev *pdev) { }
353 static inline void pcie_aspm_pm_state_change(struct pci_dev *pdev) { }
354 static inline void pcie_aspm_powersave_config_link(struct pci_dev *pdev) { }
355 #endif
357 #ifdef CONFIG_PCIEASPM_DEBUG
358 void pcie_aspm_create_sysfs_dev_files(struct pci_dev *pdev);
359 void pcie_aspm_remove_sysfs_dev_files(struct pci_dev *pdev);
360 #else
361 static inline void pcie_aspm_create_sysfs_dev_files(struct pci_dev *pdev) { }
362 static inline void pcie_aspm_remove_sysfs_dev_files(struct pci_dev *pdev) { }
363 #endif
365 #ifdef CONFIG_PCIE_PTM
366 void pci_ptm_init(struct pci_dev *dev);
367 #else
368 static inline void pci_ptm_init(struct pci_dev *dev) { }
369 #endif
371 struct pci_dev_reset_methods {
372 u16 vendor;
373 u16 device;
374 int (*reset)(struct pci_dev *dev, int probe);
377 #ifdef CONFIG_PCI_QUIRKS
378 int pci_dev_specific_reset(struct pci_dev *dev, int probe);
379 #else
380 static inline int pci_dev_specific_reset(struct pci_dev *dev, int probe)
382 return -ENOTTY;
384 #endif
386 #if defined(CONFIG_PCI_QUIRKS) && defined(CONFIG_ARM64)
387 int acpi_get_rc_resources(struct device *dev, const char *hid, u16 segment,
388 struct resource *res);
389 #endif
391 u32 pci_rebar_get_possible_sizes(struct pci_dev *pdev, int bar);
392 int pci_rebar_get_current_size(struct pci_dev *pdev, int bar);
393 int pci_rebar_set_size(struct pci_dev *pdev, int bar, int size);
394 static inline u64 pci_rebar_size_to_bytes(int size)
396 return 1ULL << (size + 20);
399 #endif /* DRIVERS_PCI_H */