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Zhao, Yu557848c2008-10-13 19:18:07 +08001#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
Wei Yangfff905f2015-06-30 09:16:41 +08007#define PCI_FIND_CAP_TTL 48
8
Jacob Keller343e51a2013-07-31 06:53:16 +00009extern const unsigned char pcie_link_speed[];
10
Yinghai Lu7a1562d2014-11-11 12:09:46 -080011bool pcie_cap_has_lnkctl(const struct pci_dev *dev);
12
Linus Torvalds1da177e2005-04-16 15:20:36 -070013/* Functions internal to the PCI core code */
14
Bjorn Helgaasf39d5b72013-04-12 12:02:59 -060015int pci_create_sysfs_dev_files(struct pci_dev *pdev);
16void pci_remove_sysfs_dev_files(struct pci_dev *pdev);
Narendra_K@Dell.com60589892011-03-02 22:34:17 +053017#if !defined(CONFIG_DMI) && !defined(CONFIG_ACPI)
Narendra K911e1c92010-07-26 05:56:50 -050018static inline void pci_create_firmware_label_files(struct pci_dev *pdev)
Narendra Kb879743f2010-08-02 07:44:29 -050019{ return; }
Narendra K911e1c92010-07-26 05:56:50 -050020static inline void pci_remove_firmware_label_files(struct pci_dev *pdev)
Narendra Kb879743f2010-08-02 07:44:29 -050021{ return; }
Narendra K911e1c92010-07-26 05:56:50 -050022#else
Bjorn Helgaasf39d5b72013-04-12 12:02:59 -060023void pci_create_firmware_label_files(struct pci_dev *pdev);
24void pci_remove_firmware_label_files(struct pci_dev *pdev);
Narendra K911e1c92010-07-26 05:56:50 -050025#endif
Bjorn Helgaasf39d5b72013-04-12 12:02:59 -060026void pci_cleanup_rom(struct pci_dev *dev);
Jesse Barnes9eff02e2008-10-24 10:32:33 -070027#ifdef HAVE_PCI_MMAP
Martin Wilck3b519e42010-11-10 11:03:21 +010028enum 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};
Bjorn Helgaasf39d5b72013-04-12 12:02:59 -060032int pci_mmap_fits(struct pci_dev *pdev, int resno, struct vm_area_struct *vmai,
33 enum pci_mmap_api mmap_api);
Jesse Barnes9eff02e2008-10-24 10:32:33 -070034#endif
Michael S. Tsirkin711d5772009-07-27 23:37:48 +030035int pci_probe_reset_function(struct pci_dev *dev);
Kumar Galace5ccde2007-07-16 23:27:10 -050036
Rafael J. Wysocki961d9122008-07-07 03:32:02 +020037/**
Randy Dunlapb33bfde2009-01-09 17:04:26 -080038 * struct pci_platform_pm_ops - Firmware PM callbacks
Rafael J. Wysocki961d9122008-07-07 03:32:02 +020039 *
Randy Dunlapb33bfde2009-01-09 17:04:26 -080040 * @is_manageable: returns 'true' if given device is power manageable by the
41 * platform firmware
Rafael J. Wysocki961d9122008-07-07 03:32:02 +020042 *
Randy Dunlapb33bfde2009-01-09 17:04:26 -080043 * @set_state: invokes the platform firmware to set the device's power state
Rafael J. Wysocki961d9122008-07-07 03:32:02 +020044 *
Randy Dunlapb33bfde2009-01-09 17:04:26 -080045 * @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
Rafael J. Wysocki961d9122008-07-07 03:32:02 +020048 *
Randy Dunlapb33bfde2009-01-09 17:04:26 -080049 * @sleep_wake: enables/disables the system wake up capability of given device
Rafael J. Wysockieb9d0fe2008-07-07 03:34:48 +020050 *
Rafael J. Wysockib67ea762010-02-17 23:44:09 +010051 * @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 *
Rafael J. Wysockibac2a902015-01-21 02:17:42 +010055 * @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 *
Rafael J. Wysocki961d9122008-07-07 03:32:02 +020059 * If given platform is generally capable of power managing PCI devices, all of
60 * these callbacks are mandatory.
61 */
62struct 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);
Rafael J. Wysockieb9d0fe2008-07-07 03:34:48 +020066 int (*sleep_wake)(struct pci_dev *dev, bool enable);
Rafael J. Wysockib67ea762010-02-17 23:44:09 +010067 int (*run_wake)(struct pci_dev *dev, bool enable);
Rafael J. Wysockibac2a902015-01-21 02:17:42 +010068 bool (*need_resume)(struct pci_dev *dev);
Rafael J. Wysocki961d9122008-07-07 03:32:02 +020069};
70
Bjorn Helgaasf39d5b72013-04-12 12:02:59 -060071int pci_set_platform_pm(struct pci_platform_pm_ops *ops);
72void pci_update_current_state(struct pci_dev *dev, pci_power_t state);
73void pci_power_up(struct pci_dev *dev);
74void pci_disable_enabled_device(struct pci_dev *dev);
75int pci_finish_runtime_suspend(struct pci_dev *dev);
76int __pci_pme_wakeup(struct pci_dev *dev, void *ign);
Rafael J. Wysockibac2a902015-01-21 02:17:42 +010077bool pci_dev_keep_suspended(struct pci_dev *dev);
Rafael J. Wysocki2cef5482015-09-30 01:10:24 +020078void pci_dev_complete_resume(struct pci_dev *pci_dev);
Bjorn Helgaasf39d5b72013-04-12 12:02:59 -060079void pci_config_pm_runtime_get(struct pci_dev *dev);
80void pci_config_pm_runtime_put(struct pci_dev *dev);
81void pci_pm_init(struct pci_dev *dev);
Sean O. Stalley938174e2015-10-29 17:35:39 -050082void pci_ea_init(struct pci_dev *dev);
Bjorn Helgaasf39d5b72013-04-12 12:02:59 -060083void pci_allocate_cap_save_buffers(struct pci_dev *dev);
Yinghai Luf7968412012-02-11 00:18:30 -080084void pci_free_cap_save_buffers(struct pci_dev *dev);
Rafael J. Wysockiaa8c6c92009-01-16 21:54:43 +010085
Rafael J. Wysockib6e335a2010-12-29 13:21:23 +010086static inline void pci_wakeup_event(struct pci_dev *dev)
87{
88 /* Wait 100 ms before the system can be put into a sleep state. */
89 pm_wakeup_event(&dev->dev, 100);
90}
91
Yijing Wang326c1cd2014-05-04 12:23:36 +080092static inline bool pci_has_subordinate(struct pci_dev *pci_dev)
Rafael J. Wysockiaa8c6c92009-01-16 21:54:43 +010093{
94 return !!(pci_dev->subordinate);
95}
David Shaohua Li0f644742005-03-19 00:15:48 -050096
Ben Hutchings94e61082008-03-05 16:52:39 +000097struct pci_vpd_ops {
Stephen Hemminger287d19c2008-12-18 09:17:16 -080098 ssize_t (*read)(struct pci_dev *dev, loff_t pos, size_t count, void *buf);
99 ssize_t (*write)(struct pci_dev *dev, loff_t pos, size_t count, const void *buf);
Ben Hutchings94e61082008-03-05 16:52:39 +0000100 void (*release)(struct pci_dev *dev);
101};
102
103struct pci_vpd {
Benjamin Li99cb233d2008-07-02 10:59:04 -0700104 unsigned int len;
Stephen Hemminger287d19c2008-12-18 09:17:16 -0800105 const struct pci_vpd_ops *ops;
Ben Hutchings94e61082008-03-05 16:52:39 +0000106 struct bin_attribute *attr; /* descriptor for sysfs VPD entry */
107};
108
Bjorn Helgaasf39d5b72013-04-12 12:02:59 -0600109int pci_vpd_pci22_init(struct pci_dev *dev);
Ben Hutchings94e61082008-03-05 16:52:39 +0000110static inline void pci_vpd_release(struct pci_dev *dev)
111{
112 if (dev->vpd)
113 dev->vpd->ops->release(dev);
114}
115
Linus Torvalds1da177e2005-04-16 15:20:36 -0700116/* PCI /proc functions */
117#ifdef CONFIG_PROC_FS
Bjorn Helgaasf39d5b72013-04-12 12:02:59 -0600118int pci_proc_attach_device(struct pci_dev *dev);
119int pci_proc_detach_device(struct pci_dev *dev);
120int pci_proc_detach_bus(struct pci_bus *bus);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700121#else
122static inline int pci_proc_attach_device(struct pci_dev *dev) { return 0; }
123static inline int pci_proc_detach_device(struct pci_dev *dev) { return 0; }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700124static inline int pci_proc_detach_bus(struct pci_bus *bus) { return 0; }
125#endif
126
127/* Functions for PCI Hotplug drivers to use */
Yinghai Lua8e4b9c2012-05-18 13:46:34 -0600128int pci_hp_add_bridge(struct pci_dev *dev);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700129
Benjamin Herrenschmidtf19aeb12008-10-03 19:49:32 +1000130#ifdef HAVE_PCI_LEGACY
Bjorn Helgaasf39d5b72013-04-12 12:02:59 -0600131void pci_create_legacy_files(struct pci_bus *bus);
132void pci_remove_legacy_files(struct pci_bus *bus);
Benjamin Herrenschmidtf19aeb12008-10-03 19:49:32 +1000133#else
134static inline void pci_create_legacy_files(struct pci_bus *bus) { return; }
135static inline void pci_remove_legacy_files(struct pci_bus *bus) { return; }
136#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700137
138/* Lock for read/write access to pci device and bus lists */
Zhang Yanmind71374d2006-06-02 12:35:43 +0800139extern struct rw_semaphore pci_bus_sem;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700140
Jan Kiszkaa2e27782011-11-04 09:46:00 +0100141extern raw_spinlock_t pci_lock;
142
Kristen Carlson Accardiffadcc22006-07-12 08:59:00 -0700143extern unsigned int pci_pm_d3_delay;
Michael Ellerman88187df2007-01-25 19:34:07 +1100144
Andrew Morton4b47b0e2005-08-16 15:16:05 -0700145#ifdef CONFIG_PCI_MSI
Matthew Wilcox309e57d2006-03-05 22:33:34 -0700146void pci_no_msi(void);
Bjorn Helgaasf39d5b72013-04-12 12:02:59 -0600147void pci_msi_init_pci_dev(struct pci_dev *dev);
Andrew Morton4b47b0e2005-08-16 15:16:05 -0700148#else
Matthew Wilcox309e57d2006-03-05 22:33:34 -0700149static inline void pci_no_msi(void) { }
Michael Ellerman4aa9bc92007-04-05 17:19:10 +1000150static inline void pci_msi_init_pci_dev(struct pci_dev *dev) { }
Andrew Morton4b47b0e2005-08-16 15:16:05 -0700151#endif
Michael Ellerman8fed4b62007-01-25 19:34:08 +1100152
Michael S. Tsirkin6a25f5e2015-05-07 09:52:21 -0500153static inline void pci_msi_set_enable(struct pci_dev *dev, int enable)
154{
155 u16 control;
156
157 pci_read_config_word(dev, dev->msi_cap + PCI_MSI_FLAGS, &control);
158 control &= ~PCI_MSI_FLAGS_ENABLE;
159 if (enable)
160 control |= PCI_MSI_FLAGS_ENABLE;
161 pci_write_config_word(dev, dev->msi_cap + PCI_MSI_FLAGS, control);
162}
163
164static inline void pci_msix_clear_and_set_ctrl(struct pci_dev *dev, u16 clear, u16 set)
165{
166 u16 ctrl;
167
168 pci_read_config_word(dev, dev->msix_cap + PCI_MSIX_FLAGS, &ctrl);
169 ctrl &= ~clear;
170 ctrl |= set;
171 pci_write_config_word(dev, dev->msix_cap + PCI_MSIX_FLAGS, ctrl);
172}
173
Yinghai Lub55438f2012-02-23 19:23:30 -0800174void pci_realloc_get_opt(char *);
Ram Paif483d392011-07-07 11:19:10 -0700175
Kristen Carlson Accardiffadcc22006-07-12 08:59:00 -0700176static inline int pci_no_d1d2(struct pci_dev *dev)
177{
178 unsigned int parent_dstates = 0;
Andrew Morton4b47b0e2005-08-16 15:16:05 -0700179
Kristen Carlson Accardiffadcc22006-07-12 08:59:00 -0700180 if (dev->bus->self)
181 parent_dstates = dev->bus->self->no_d1d2;
182 return (dev->no_d1d2 || parent_dstates);
183
184}
Greg Kroah-Hartman5136b2d2013-10-06 23:55:40 -0700185extern const struct attribute_group *pci_dev_groups[];
Greg Kroah-Hartman56039e62013-07-24 15:05:17 -0700186extern const struct attribute_group *pcibus_groups[];
Yinghai Lu4e15c462012-11-05 15:20:34 -0500187extern struct device_type pci_dev_type;
Greg Kroah-Hartman0f49ba52013-10-07 14:51:02 -0600188extern const struct attribute_group *pci_bus_groups[];
Alex Chiang705b1aa2009-03-20 14:56:31 -0600189
Linus Torvalds1da177e2005-04-16 15:20:36 -0700190
191/**
192 * pci_match_one_device - Tell if a PCI device structure has a matching
193 * PCI device id structure
194 * @id: single PCI device id structure to match
195 * @dev: the PCI device structure to match against
Greg Kroah-Hartman367b09f2008-01-30 15:21:33 -0800196 *
Linus Torvalds1da177e2005-04-16 15:20:36 -0700197 * Returns the matching pci_device_id structure or %NULL if there is no match.
198 */
199static inline const struct pci_device_id *
200pci_match_one_device(const struct pci_device_id *id, const struct pci_dev *dev)
201{
202 if ((id->vendor == PCI_ANY_ID || id->vendor == dev->vendor) &&
203 (id->device == PCI_ANY_ID || id->device == dev->device) &&
204 (id->subvendor == PCI_ANY_ID || id->subvendor == dev->subsystem_vendor) &&
205 (id->subdevice == PCI_ANY_ID || id->subdevice == dev->subsystem_device) &&
206 !((id->class ^ dev->class) & id->class_mask))
207 return id;
208 return NULL;
209}
210
Alex Chiangf46753c2008-06-10 15:28:50 -0600211/* PCI slot sysfs helper code */
212#define to_pci_slot(s) container_of(s, struct pci_slot, kobj)
213
214extern struct kset *pci_slots_kset;
215
216struct pci_slot_attribute {
217 struct attribute attr;
218 ssize_t (*show)(struct pci_slot *, char *);
219 ssize_t (*store)(struct pci_slot *, const char *, size_t);
220};
221#define to_pci_slot_attr(s) container_of(s, struct pci_slot_attribute, attr)
222
Yu Zhao0b400c72008-11-22 02:40:40 +0800223enum pci_bar_type {
224 pci_bar_unknown, /* Standard PCI BAR probe */
225 pci_bar_io, /* An io port BAR */
226 pci_bar_mem32, /* A 32-bit memory BAR */
227 pci_bar_mem64, /* A 64-bit memory BAR */
228};
229
Yinghai Luefdc87d2012-01-27 10:55:10 -0800230bool pci_bus_read_dev_vendor_id(struct pci_bus *bus, int devfn, u32 *pl,
231 int crs_timeout);
Bjorn Helgaasf39d5b72013-04-12 12:02:59 -0600232int pci_setup_device(struct pci_dev *dev);
233int __pci_read_base(struct pci_dev *dev, enum pci_bar_type type,
234 struct resource *res, unsigned int reg);
235int pci_resource_bar(struct pci_dev *dev, int resno, enum pci_bar_type *type);
236void pci_configure_ari(struct pci_dev *dev);
Bjorn Helgaas10874f52014-04-14 16:11:40 -0600237void __pci_bus_size_bridges(struct pci_bus *bus,
Jiang Liud66ecb72013-06-23 01:01:35 +0200238 struct list_head *realloc_head);
Bjorn Helgaas10874f52014-04-14 16:11:40 -0600239void __pci_bus_assign_resources(const struct pci_bus *bus,
240 struct list_head *realloc_head,
241 struct list_head *fail_head);
Yinghai Lu0f7e7ae2015-01-15 16:21:49 -0600242bool pci_bus_clip_resource(struct pci_dev *dev, int idx);
Bjorn Helgaas939de1d2013-01-26 17:35:58 -0700243
Yinghai Lu2069ecf2012-02-15 21:40:31 -0800244void pci_reassigndev_resource_alignment(struct pci_dev *dev);
Bjorn Helgaasf39d5b72013-04-12 12:02:59 -0600245void pci_disable_bridge_window(struct pci_dev *dev);
Yuji Shimada32a9a6822009-03-16 17:13:39 +0900246
Yu Zhaod1b054d2009-03-20 11:25:11 +0800247/* Single Root I/O Virtualization */
248struct pci_sriov {
249 int pos; /* capability position */
250 int nres; /* number of resources */
251 u32 cap; /* SR-IOV Capabilities */
252 u16 ctrl; /* SR-IOV Control */
Bjorn Helgaas6b136722012-11-09 20:27:53 -0700253 u16 total_VFs; /* total VFs associated with the PF */
254 u16 initial_VFs; /* initial VFs associated with the PF */
255 u16 num_VFs; /* number of VFs available */
Yu Zhaod1b054d2009-03-20 11:25:11 +0800256 u16 offset; /* first VF Routing ID offset */
257 u16 stride; /* following VF stride */
258 u32 pgsz; /* page size for BAR alignment */
259 u8 link; /* Function Dependency Link */
Wei Yang4449f072015-03-25 16:23:47 +0800260 u8 max_VF_buses; /* max buses consumed by VFs */
Bjorn Helgaas6b136722012-11-09 20:27:53 -0700261 u16 driver_max_VFs; /* max num VFs driver supports */
Yu Zhaod1b054d2009-03-20 11:25:11 +0800262 struct pci_dev *dev; /* lowest numbered PF */
263 struct pci_dev *self; /* this PF */
264 struct mutex lock; /* lock for VF bus */
Wei Yang0e6c9122015-03-25 16:23:44 +0800265 resource_size_t barsz[PCI_SRIOV_NUM_BARS]; /* VF BAR size */
Yu Zhaod1b054d2009-03-20 11:25:11 +0800266};
267
Hao, Xudong1900ca12011-12-17 21:24:40 +0800268#ifdef CONFIG_PCI_ATS
Bjorn Helgaasf39d5b72013-04-12 12:02:59 -0600269void pci_restore_ats_state(struct pci_dev *dev);
Hao, Xudong1900ca12011-12-17 21:24:40 +0800270#else
271static inline void pci_restore_ats_state(struct pci_dev *dev)
272{
273}
274#endif /* CONFIG_PCI_ATS */
275
Yu Zhaod1b054d2009-03-20 11:25:11 +0800276#ifdef CONFIG_PCI_IOV
Bjorn Helgaasf39d5b72013-04-12 12:02:59 -0600277int pci_iov_init(struct pci_dev *dev);
278void pci_iov_release(struct pci_dev *dev);
Myron Stowe26ff46c2014-11-11 08:04:50 -0700279int pci_iov_resource_bar(struct pci_dev *dev, int resno);
Bjorn Helgaasf39d5b72013-04-12 12:02:59 -0600280resource_size_t pci_sriov_resource_alignment(struct pci_dev *dev, int resno);
281void pci_restore_iov_state(struct pci_dev *dev);
282int pci_iov_bus_range(struct pci_bus *bus);
Yu Zhao302b4212009-05-18 13:51:32 +0800283
Yu Zhaod1b054d2009-03-20 11:25:11 +0800284#else
285static inline int pci_iov_init(struct pci_dev *dev)
286{
287 return -ENODEV;
288}
289static inline void pci_iov_release(struct pci_dev *dev)
290
291{
292}
Myron Stowe26ff46c2014-11-11 08:04:50 -0700293static inline int pci_iov_resource_bar(struct pci_dev *dev, int resno)
Yu Zhaod1b054d2009-03-20 11:25:11 +0800294{
295 return 0;
296}
Yu Zhao8c5cdb62009-03-20 11:25:12 +0800297static inline void pci_restore_iov_state(struct pci_dev *dev)
298{
299}
Yu Zhaoa28724b2009-03-20 11:25:13 +0800300static inline int pci_iov_bus_range(struct pci_bus *bus)
301{
302 return 0;
303}
Yu Zhao302b4212009-05-18 13:51:32 +0800304
Yu Zhaod1b054d2009-03-20 11:25:11 +0800305#endif /* CONFIG_PCI_IOV */
306
Bjorn Helgaasf39d5b72013-04-12 12:02:59 -0600307unsigned long pci_cardbus_resource_alignment(struct resource *);
Ram Pai0a2daa12011-07-25 13:08:41 -0700308
Cam Macdonell0e522472010-09-07 17:25:20 -0700309static inline resource_size_t pci_resource_alignment(struct pci_dev *dev,
Bjorn Helgaasf39d5b72013-04-12 12:02:59 -0600310 struct resource *res)
Chris Wright6faf17f2009-08-28 13:00:06 -0700311{
312#ifdef CONFIG_PCI_IOV
313 int resno = res - dev->resource;
314
315 if (resno >= PCI_IOV_RESOURCES && resno <= PCI_IOV_RESOURCE_END)
316 return pci_sriov_resource_alignment(dev, resno);
317#endif
Ram Pai0a2daa12011-07-25 13:08:41 -0700318 if (dev->class >> 8 == PCI_CLASS_BRIDGE_CARDBUS)
319 return pci_cardbus_resource_alignment(res);
Chris Wright6faf17f2009-08-28 13:00:06 -0700320 return resource_alignment(res);
321}
322
Bjorn Helgaasf39d5b72013-04-12 12:02:59 -0600323void pci_enable_acs(struct pci_dev *dev);
Allen Kayae21ee62009-10-07 10:27:17 -0700324
Dexuan Cuib9c3b262009-12-07 13:03:21 +0800325struct pci_dev_reset_methods {
326 u16 vendor;
327 u16 device;
328 int (*reset)(struct pci_dev *dev, int probe);
329};
330
Rafael J. Wysocki93177a72010-01-02 22:57:24 +0100331#ifdef CONFIG_PCI_QUIRKS
Bjorn Helgaasf39d5b72013-04-12 12:02:59 -0600332int pci_dev_specific_reset(struct pci_dev *dev, int probe);
Rafael J. Wysocki93177a72010-01-02 22:57:24 +0100333#else
334static inline int pci_dev_specific_reset(struct pci_dev *dev, int probe)
335{
336 return -ENOTTY;
337}
338#endif
Dexuan Cuib9c3b262009-12-07 13:03:21 +0800339
Aaron Lu3390e082015-03-25 14:32:25 +0800340struct pci_host_bridge *pci_find_host_bridge(struct pci_bus *bus);
341
Zhao, Yu557848c2008-10-13 19:18:07 +0800342#endif /* DRIVERS_PCI_H */