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