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PCI: initialize and release SR-IOV capability
[mirror_ubuntu-bionic-kernel.git] / drivers / pci / pci.h
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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/* Functions internal to the PCI core code */
8
9extern int pci_uevent(struct device *dev, struct kobj_uevent_env *env);
10extern int pci_create_sysfs_dev_files(struct pci_dev *pdev);
11extern void pci_remove_sysfs_dev_files(struct pci_dev *pdev);
12extern void pci_cleanup_rom(struct pci_dev *dev);
13#ifdef HAVE_PCI_MMAP
14extern int pci_mmap_fits(struct pci_dev *pdev, int resno,
15 struct vm_area_struct *vma);
16#endif
17
18/**
19 * struct pci_platform_pm_ops - Firmware PM callbacks
20 *
21 * @is_manageable: returns 'true' if given device is power manageable by the
22 * platform firmware
23 *
24 * @set_state: invokes the platform firmware to set the device's power state
25 *
26 * @choose_state: returns PCI power state of given device preferred by the
27 * platform; to be used during system-wide transitions from a
28 * sleeping state to the working state and vice versa
29 *
30 * @can_wakeup: returns 'true' if given device is capable of waking up the
31 * system from a sleeping state
32 *
33 * @sleep_wake: enables/disables the system wake up capability of given device
34 *
35 * If given platform is generally capable of power managing PCI devices, all of
36 * these callbacks are mandatory.
37 */
38struct pci_platform_pm_ops {
39 bool (*is_manageable)(struct pci_dev *dev);
40 int (*set_state)(struct pci_dev *dev, pci_power_t state);
41 pci_power_t (*choose_state)(struct pci_dev *dev);
42 bool (*can_wakeup)(struct pci_dev *dev);
43 int (*sleep_wake)(struct pci_dev *dev, bool enable);
44};
45
46extern int pci_set_platform_pm(struct pci_platform_pm_ops *ops);
47extern void pci_update_current_state(struct pci_dev *dev, pci_power_t state);
48extern void pci_disable_enabled_device(struct pci_dev *dev);
49extern void pci_pm_init(struct pci_dev *dev);
50extern void platform_pci_wakeup_init(struct pci_dev *dev);
51extern void pci_allocate_cap_save_buffers(struct pci_dev *dev);
52extern int pci_restore_standard_config(struct pci_dev *dev);
53
54static inline bool pci_is_bridge(struct pci_dev *pci_dev)
55{
56 return !!(pci_dev->subordinate);
57}
58
59extern int pci_user_read_config_byte(struct pci_dev *dev, int where, u8 *val);
60extern int pci_user_read_config_word(struct pci_dev *dev, int where, u16 *val);
61extern int pci_user_read_config_dword(struct pci_dev *dev, int where, u32 *val);
62extern int pci_user_write_config_byte(struct pci_dev *dev, int where, u8 val);
63extern int pci_user_write_config_word(struct pci_dev *dev, int where, u16 val);
64extern int pci_user_write_config_dword(struct pci_dev *dev, int where, u32 val);
65
66struct pci_vpd_ops {
67 ssize_t (*read)(struct pci_dev *dev, loff_t pos, size_t count, void *buf);
68 ssize_t (*write)(struct pci_dev *dev, loff_t pos, size_t count, const void *buf);
69 void (*release)(struct pci_dev *dev);
70};
71
72struct pci_vpd {
73 unsigned int len;
74 const struct pci_vpd_ops *ops;
75 struct bin_attribute *attr; /* descriptor for sysfs VPD entry */
76};
77
78extern int pci_vpd_pci22_init(struct pci_dev *dev);
79static inline void pci_vpd_release(struct pci_dev *dev)
80{
81 if (dev->vpd)
82 dev->vpd->ops->release(dev);
83}
84
85/* PCI /proc functions */
86#ifdef CONFIG_PROC_FS
87extern int pci_proc_attach_device(struct pci_dev *dev);
88extern int pci_proc_detach_device(struct pci_dev *dev);
89extern int pci_proc_detach_bus(struct pci_bus *bus);
90#else
91static inline int pci_proc_attach_device(struct pci_dev *dev) { return 0; }
92static inline int pci_proc_detach_device(struct pci_dev *dev) { return 0; }
93static inline int pci_proc_detach_bus(struct pci_bus *bus) { return 0; }
94#endif
95
96/* Functions for PCI Hotplug drivers to use */
97extern unsigned int pci_do_scan_bus(struct pci_bus *bus);
98
99#ifdef HAVE_PCI_LEGACY
100extern void pci_create_legacy_files(struct pci_bus *bus);
101extern void pci_remove_legacy_files(struct pci_bus *bus);
102#else
103static inline void pci_create_legacy_files(struct pci_bus *bus) { return; }
104static inline void pci_remove_legacy_files(struct pci_bus *bus) { return; }
105#endif
106
107/* Lock for read/write access to pci device and bus lists */
108extern struct rw_semaphore pci_bus_sem;
109
110extern unsigned int pci_pm_d3_delay;
111
112#ifdef CONFIG_PCI_MSI
113void pci_no_msi(void);
114extern void pci_msi_init_pci_dev(struct pci_dev *dev);
115#else
116static inline void pci_no_msi(void) { }
117static inline void pci_msi_init_pci_dev(struct pci_dev *dev) { }
118#endif
119
120#ifdef CONFIG_PCIEAER
121void pci_no_aer(void);
122#else
123static inline void pci_no_aer(void) { }
124#endif
125
126static inline int pci_no_d1d2(struct pci_dev *dev)
127{
128 unsigned int parent_dstates = 0;
129
130 if (dev->bus->self)
131 parent_dstates = dev->bus->self->no_d1d2;
132 return (dev->no_d1d2 || parent_dstates);
133
134}
135extern int pcie_mch_quirk;
136extern struct device_attribute pci_dev_attrs[];
137extern struct device_attribute dev_attr_cpuaffinity;
138extern struct device_attribute dev_attr_cpulistaffinity;
139
140/**
141 * pci_match_one_device - Tell if a PCI device structure has a matching
142 * PCI device id structure
143 * @id: single PCI device id structure to match
144 * @dev: the PCI device structure to match against
145 *
146 * Returns the matching pci_device_id structure or %NULL if there is no match.
147 */
148static inline const struct pci_device_id *
149pci_match_one_device(const struct pci_device_id *id, const struct pci_dev *dev)
150{
151 if ((id->vendor == PCI_ANY_ID || id->vendor == dev->vendor) &&
152 (id->device == PCI_ANY_ID || id->device == dev->device) &&
153 (id->subvendor == PCI_ANY_ID || id->subvendor == dev->subsystem_vendor) &&
154 (id->subdevice == PCI_ANY_ID || id->subdevice == dev->subsystem_device) &&
155 !((id->class ^ dev->class) & id->class_mask))
156 return id;
157 return NULL;
158}
159
160struct pci_dev *pci_find_upstream_pcie_bridge(struct pci_dev *pdev);
161
162/* PCI slot sysfs helper code */
163#define to_pci_slot(s) container_of(s, struct pci_slot, kobj)
164
165extern struct kset *pci_slots_kset;
166
167struct pci_slot_attribute {
168 struct attribute attr;
169 ssize_t (*show)(struct pci_slot *, char *);
170 ssize_t (*store)(struct pci_slot *, const char *, size_t);
171};
172#define to_pci_slot_attr(s) container_of(s, struct pci_slot_attribute, attr)
173
174enum pci_bar_type {
175 pci_bar_unknown, /* Standard PCI BAR probe */
176 pci_bar_io, /* An io port BAR */
177 pci_bar_mem32, /* A 32-bit memory BAR */
178 pci_bar_mem64, /* A 64-bit memory BAR */
179};
180
181extern int __pci_read_base(struct pci_dev *dev, enum pci_bar_type type,
182 struct resource *res, unsigned int reg);
183extern int pci_resource_bar(struct pci_dev *dev, int resno,
184 enum pci_bar_type *type);
185extern int pci_bus_add_child(struct pci_bus *bus);
186extern void pci_enable_ari(struct pci_dev *dev);
187/**
188 * pci_ari_enabled - query ARI forwarding status
189 * @bus: the PCI bus
190 *
191 * Returns 1 if ARI forwarding is enabled, or 0 if not enabled;
192 */
193static inline int pci_ari_enabled(struct pci_bus *bus)
194{
195 return bus->self && bus->self->ari_enabled;
196}
197
198#ifdef CONFIG_PCI_QUIRKS
199extern int pci_is_reassigndev(struct pci_dev *dev);
200resource_size_t pci_specified_resource_alignment(struct pci_dev *dev);
201extern void pci_disable_bridge_window(struct pci_dev *dev);
202#endif
203
204/* Single Root I/O Virtualization */
205struct pci_sriov {
206 int pos; /* capability position */
207 int nres; /* number of resources */
208 u32 cap; /* SR-IOV Capabilities */
209 u16 ctrl; /* SR-IOV Control */
210 u16 total; /* total VFs associated with the PF */
211 u16 offset; /* first VF Routing ID offset */
212 u16 stride; /* following VF stride */
213 u32 pgsz; /* page size for BAR alignment */
214 u8 link; /* Function Dependency Link */
215 struct pci_dev *dev; /* lowest numbered PF */
216 struct pci_dev *self; /* this PF */
217 struct mutex lock; /* lock for VF bus */
218};
219
220#ifdef CONFIG_PCI_IOV
221extern int pci_iov_init(struct pci_dev *dev);
222extern void pci_iov_release(struct pci_dev *dev);
223extern int pci_iov_resource_bar(struct pci_dev *dev, int resno,
224 enum pci_bar_type *type);
225#else
226static inline int pci_iov_init(struct pci_dev *dev)
227{
228 return -ENODEV;
229}
230static inline void pci_iov_release(struct pci_dev *dev)
231
232{
233}
234static inline int pci_iov_resource_bar(struct pci_dev *dev, int resno,
235 enum pci_bar_type *type)
236{
237 return 0;
238}
239#endif /* CONFIG_PCI_IOV */
240
241#endif /* DRIVERS_PCI_H */
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