pci.h 11.4 KB
Newer Older
1 2 3
#ifndef DRIVERS_PCI_H
#define DRIVERS_PCI_H

4 5
#define PCI_FIND_CAP_TTL	48

6 7
#define PCI_VSEC_ID_INTEL_TBT	0x1234	/* Thunderbolt */

8 9
extern const unsigned char pcie_link_speed[];

10 11
bool pcie_cap_has_lnkctl(const struct pci_dev *dev);

L
Linus Torvalds 已提交
12 13
/* Functions internal to the PCI core code */

14 15
int pci_create_sysfs_dev_files(struct pci_dev *pdev);
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 23
void pci_create_firmware_label_files(struct pci_dev *pdev);
void pci_remove_firmware_label_files(struct pci_dev *pdev);
24
#endif
25
void pci_cleanup_rom(struct pci_dev *dev);
26

27 28 29 30
enum pci_mmap_api {
	PCI_MMAP_SYSFS,	/* mmap on /sys/bus/pci/devices/<BDF>/resource<N> */
	PCI_MMAP_PROCFS	/* mmap on /proc/bus/pci/<BDF> */
};
31 32
int pci_mmap_fits(struct pci_dev *pdev, int resno, struct vm_area_struct *vmai,
		  enum pci_mmap_api mmap_api);
33

34
int pci_probe_reset_function(struct pci_dev *dev);
35

36
/**
37
 * struct pci_platform_pm_ops - Firmware PM callbacks
38
 *
39 40
 * @is_manageable: returns 'true' if given device is power manageable by the
 *                 platform firmware
41
 *
42
 * @set_state: invokes the platform firmware to set the device's power state
43
 *
44 45
 * @get_state: queries the platform firmware for a device's current power state
 *
46 47 48
 * @choose_state: returns PCI power state of given device preferred by the
 *                platform; to be used during system-wide transitions from a
 *                sleeping state to the working state and vice versa
49
 *
50
 * @set_wakeup: enables/disables wakeup capability for the device
51
 *
52 53 54 55
 * @need_resume: returns 'true' if the given device (which is currently
 *		suspended) needs to be resumed to be configured for system
 *		wakeup.
 *
56 57 58 59 60 61
 * If given platform is generally capable of power managing PCI devices, all of
 * these callbacks are mandatory.
 */
struct pci_platform_pm_ops {
	bool (*is_manageable)(struct pci_dev *dev);
	int (*set_state)(struct pci_dev *dev, pci_power_t state);
62
	pci_power_t (*get_state)(struct pci_dev *dev);
63
	pci_power_t (*choose_state)(struct pci_dev *dev);
64
	int (*set_wakeup)(struct pci_dev *dev, bool enable);
65
	bool (*need_resume)(struct pci_dev *dev);
66 67
};

68
int pci_set_platform_pm(const struct pci_platform_pm_ops *ops);
69 70 71 72 73
void pci_update_current_state(struct pci_dev *dev, pci_power_t state);
void pci_power_up(struct pci_dev *dev);
void pci_disable_enabled_device(struct pci_dev *dev);
int pci_finish_runtime_suspend(struct pci_dev *dev);
int __pci_pme_wakeup(struct pci_dev *dev, void *ign);
74
void pci_pme_restore(struct pci_dev *dev);
75
bool pci_dev_keep_suspended(struct pci_dev *dev);
76
void pci_dev_complete_resume(struct pci_dev *pci_dev);
77 78 79
void pci_config_pm_runtime_get(struct pci_dev *dev);
void pci_config_pm_runtime_put(struct pci_dev *dev);
void pci_pm_init(struct pci_dev *dev);
80
void pci_ea_init(struct pci_dev *dev);
81
void pci_allocate_cap_save_buffers(struct pci_dev *dev);
82
void pci_free_cap_save_buffers(struct pci_dev *dev);
83
bool pci_bridge_d3_possible(struct pci_dev *dev);
84
void pci_bridge_d3_update(struct pci_dev *dev);
85

86 87 88 89 90 91
static inline void pci_wakeup_event(struct pci_dev *dev)
{
	/* Wait 100 ms before the system can be put into a sleep state. */
	pm_wakeup_event(&dev->dev, 100);
}

92
static inline bool pci_has_subordinate(struct pci_dev *pci_dev)
93 94 95
{
	return !!(pci_dev->subordinate);
}
96

97 98 99 100 101 102 103 104 105
static inline bool pci_power_manageable(struct pci_dev *pci_dev)
{
	/*
	 * Currently we allow normal PCI devices and PCI bridges transition
	 * into D3 if their bridge_d3 is set.
	 */
	return !pci_has_subordinate(pci_dev) || pci_dev->bridge_d3;
}

106
struct pci_vpd_ops {
107 108
	ssize_t (*read)(struct pci_dev *dev, loff_t pos, size_t count, void *buf);
	ssize_t (*write)(struct pci_dev *dev, loff_t pos, size_t count, const void *buf);
109
	int (*set_size)(struct pci_dev *dev, size_t len);
110 111 112
};

struct pci_vpd {
113
	const struct pci_vpd_ops *ops;
114
	struct bin_attribute *attr; /* descriptor for sysfs VPD entry */
115 116 117 118 119 120
	struct mutex	lock;
	unsigned int	len;
	u16		flag;
	u8		cap;
	u8		busy:1;
	u8		valid:1;
121 122
};

123
int pci_vpd_init(struct pci_dev *dev);
124
void pci_vpd_release(struct pci_dev *dev);
125

L
Linus Torvalds 已提交
126 127
/* PCI /proc functions */
#ifdef CONFIG_PROC_FS
128 129 130
int pci_proc_attach_device(struct pci_dev *dev);
int pci_proc_detach_device(struct pci_dev *dev);
int pci_proc_detach_bus(struct pci_bus *bus);
L
Linus Torvalds 已提交
131 132 133 134 135 136 137
#else
static inline int pci_proc_attach_device(struct pci_dev *dev) { return 0; }
static inline int pci_proc_detach_device(struct pci_dev *dev) { return 0; }
static inline int pci_proc_detach_bus(struct pci_bus *bus) { return 0; }
#endif

/* Functions for PCI Hotplug drivers to use */
138
int pci_hp_add_bridge(struct pci_dev *dev);
L
Linus Torvalds 已提交
139

140
#ifdef HAVE_PCI_LEGACY
141 142
void pci_create_legacy_files(struct pci_bus *bus);
void pci_remove_legacy_files(struct pci_bus *bus);
143 144 145 146
#else
static inline void pci_create_legacy_files(struct pci_bus *bus) { return; }
static inline void pci_remove_legacy_files(struct pci_bus *bus) { return; }
#endif
L
Linus Torvalds 已提交
147 148

/* Lock for read/write access to pci device and bus lists */
149
extern struct rw_semaphore pci_bus_sem;
L
Linus Torvalds 已提交
150

151 152
extern raw_spinlock_t pci_lock;

153
extern unsigned int pci_pm_d3_delay;
154

155
#ifdef CONFIG_PCI_MSI
156
void pci_no_msi(void);
157
#else
158
static inline void pci_no_msi(void) { }
159
#endif
160

161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181
static inline void pci_msi_set_enable(struct pci_dev *dev, int enable)
{
	u16 control;

	pci_read_config_word(dev, dev->msi_cap + PCI_MSI_FLAGS, &control);
	control &= ~PCI_MSI_FLAGS_ENABLE;
	if (enable)
		control |= PCI_MSI_FLAGS_ENABLE;
	pci_write_config_word(dev, dev->msi_cap + PCI_MSI_FLAGS, control);
}

static inline void pci_msix_clear_and_set_ctrl(struct pci_dev *dev, u16 clear, u16 set)
{
	u16 ctrl;

	pci_read_config_word(dev, dev->msix_cap + PCI_MSIX_FLAGS, &ctrl);
	ctrl &= ~clear;
	ctrl |= set;
	pci_write_config_word(dev, dev->msix_cap + PCI_MSIX_FLAGS, ctrl);
}

182
void pci_realloc_get_opt(char *);
183

184 185 186
static inline int pci_no_d1d2(struct pci_dev *dev)
{
	unsigned int parent_dstates = 0;
187

188 189 190 191 192
	if (dev->bus->self)
		parent_dstates = dev->bus->self->no_d1d2;
	return (dev->no_d1d2 || parent_dstates);

}
193
extern const struct attribute_group *pci_dev_groups[];
194
extern const struct attribute_group *pcibus_groups[];
195
extern struct device_type pci_dev_type;
196
extern const struct attribute_group *pci_bus_groups[];
A
Alex Chiang 已提交
197

L
Linus Torvalds 已提交
198 199 200 201 202 203

/**
 * pci_match_one_device - Tell if a PCI device structure has a matching
 *                        PCI device id structure
 * @id: single PCI device id structure to match
 * @dev: the PCI device structure to match against
204
 *
L
Linus Torvalds 已提交
205 206 207 208 209 210 211 212 213 214 215 216 217 218
 * Returns the matching pci_device_id structure or %NULL if there is no match.
 */
static inline const struct pci_device_id *
pci_match_one_device(const struct pci_device_id *id, const struct pci_dev *dev)
{
	if ((id->vendor == PCI_ANY_ID || id->vendor == dev->vendor) &&
	    (id->device == PCI_ANY_ID || id->device == dev->device) &&
	    (id->subvendor == PCI_ANY_ID || id->subvendor == dev->subsystem_vendor) &&
	    (id->subdevice == PCI_ANY_ID || id->subdevice == dev->subsystem_device) &&
	    !((id->class ^ dev->class) & id->class_mask))
		return id;
	return NULL;
}

A
Alex Chiang 已提交
219 220 221 222 223 224 225 226 227 228 229 230
/* PCI slot sysfs helper code */
#define to_pci_slot(s) container_of(s, struct pci_slot, kobj)

extern struct kset *pci_slots_kset;

struct pci_slot_attribute {
	struct attribute attr;
	ssize_t (*show)(struct pci_slot *, char *);
	ssize_t (*store)(struct pci_slot *, const char *, size_t);
};
#define to_pci_slot_attr(s) container_of(s, struct pci_slot_attribute, attr)

Y
Yu Zhao 已提交
231 232 233 234 235 236 237
enum pci_bar_type {
	pci_bar_unknown,	/* Standard PCI BAR probe */
	pci_bar_io,		/* An io port BAR */
	pci_bar_mem32,		/* A 32-bit memory BAR */
	pci_bar_mem64,		/* A 64-bit memory BAR */
};

238
int pci_configure_extended_tags(struct pci_dev *dev, void *ign);
239 240
bool pci_bus_read_dev_vendor_id(struct pci_bus *bus, int devfn, u32 *pl,
				int crs_timeout);
241 242 243 244
int pci_setup_device(struct pci_dev *dev);
int __pci_read_base(struct pci_dev *dev, enum pci_bar_type type,
		    struct resource *res, unsigned int reg);
void pci_configure_ari(struct pci_dev *dev);
245
void __pci_bus_size_bridges(struct pci_bus *bus,
246
			struct list_head *realloc_head);
247 248 249
void __pci_bus_assign_resources(const struct pci_bus *bus,
				struct list_head *realloc_head,
				struct list_head *fail_head);
250
bool pci_bus_clip_resource(struct pci_dev *dev, int idx);
251

252
void pci_reassigndev_resource_alignment(struct pci_dev *dev);
253
void pci_disable_bridge_window(struct pci_dev *dev);
254

255 256 257 258 259 260
/* Single Root I/O Virtualization */
struct pci_sriov {
	int pos;		/* capability position */
	int nres;		/* number of resources */
	u32 cap;		/* SR-IOV Capabilities */
	u16 ctrl;		/* SR-IOV Control */
261 262 263
	u16 total_VFs;		/* total VFs associated with the PF */
	u16 initial_VFs;	/* initial VFs associated with the PF */
	u16 num_VFs;		/* number of VFs available */
264 265 266 267
	u16 offset;		/* first VF Routing ID offset */
	u16 stride;		/* following VF stride */
	u32 pgsz;		/* page size for BAR alignment */
	u8 link;		/* Function Dependency Link */
268
	u8 max_VF_buses;	/* max buses consumed by VFs */
269
	u16 driver_max_VFs;	/* max num VFs driver supports */
270 271
	struct pci_dev *dev;	/* lowest numbered PF */
	struct pci_dev *self;	/* this PF */
272
	resource_size_t barsz[PCI_SRIOV_NUM_BARS];	/* VF BAR size */
273
	bool drivers_autoprobe;	/* auto probing of VFs by driver */
274 275
};

K
Keith Busch 已提交
276 277 278 279 280 281 282 283 284 285 286 287 288 289
/* pci_dev priv_flags */
#define PCI_DEV_DISCONNECTED 0

static inline int pci_dev_set_disconnected(struct pci_dev *dev, void *unused)
{
	set_bit(PCI_DEV_DISCONNECTED, &dev->priv_flags);
	return 0;
}

static inline bool pci_dev_is_disconnected(const struct pci_dev *dev)
{
	return test_bit(PCI_DEV_DISCONNECTED, &dev->priv_flags);
}

290
#ifdef CONFIG_PCI_ATS
291
void pci_restore_ats_state(struct pci_dev *dev);
292 293 294 295 296 297
#else
static inline void pci_restore_ats_state(struct pci_dev *dev)
{
}
#endif /* CONFIG_PCI_ATS */

298
#ifdef CONFIG_PCI_IOV
299 300
int pci_iov_init(struct pci_dev *dev);
void pci_iov_release(struct pci_dev *dev);
301
void pci_iov_update_resource(struct pci_dev *dev, int resno);
302 303 304
resource_size_t pci_sriov_resource_alignment(struct pci_dev *dev, int resno);
void pci_restore_iov_state(struct pci_dev *dev);
int pci_iov_bus_range(struct pci_bus *bus);
Y
Yu Zhao 已提交
305

306 307 308 309 310 311 312 313 314
#else
static inline int pci_iov_init(struct pci_dev *dev)
{
	return -ENODEV;
}
static inline void pci_iov_release(struct pci_dev *dev)

{
}
Y
Yu Zhao 已提交
315 316 317
static inline void pci_restore_iov_state(struct pci_dev *dev)
{
}
318 319 320 321
static inline int pci_iov_bus_range(struct pci_bus *bus)
{
	return 0;
}
Y
Yu Zhao 已提交
322

323 324
#endif /* CONFIG_PCI_IOV */

325
unsigned long pci_cardbus_resource_alignment(struct resource *);
326

327
static inline resource_size_t pci_resource_alignment(struct pci_dev *dev,
328
						     struct resource *res)
329 330 331 332 333 334 335
{
#ifdef CONFIG_PCI_IOV
	int resno = res - dev->resource;

	if (resno >= PCI_IOV_RESOURCES && resno <= PCI_IOV_RESOURCE_END)
		return pci_sriov_resource_alignment(dev, resno);
#endif
336 337
	if (dev->class >> 8  == PCI_CLASS_BRIDGE_CARDBUS)
		return pci_cardbus_resource_alignment(res);
338 339 340
	return resource_alignment(res);
}

341
void pci_enable_acs(struct pci_dev *dev);
342

343 344 345 346 347 348
#ifdef CONFIG_PCIE_PTM
void pci_ptm_init(struct pci_dev *dev);
#else
static inline void pci_ptm_init(struct pci_dev *dev) { }
#endif

349 350 351 352 353 354
struct pci_dev_reset_methods {
	u16 vendor;
	u16 device;
	int (*reset)(struct pci_dev *dev, int probe);
};

355
#ifdef CONFIG_PCI_QUIRKS
356
int pci_dev_specific_reset(struct pci_dev *dev, int probe);
357 358 359 360 361 362
#else
static inline int pci_dev_specific_reset(struct pci_dev *dev, int probe)
{
	return -ENOTTY;
}
#endif
363

364 365 366 367 368
#if defined(CONFIG_PCI_QUIRKS) && defined(CONFIG_ARM64)
int acpi_get_rc_resources(struct device *dev, const char *hid, u16 segment,
			  struct resource *res);
#endif

369
#endif /* DRIVERS_PCI_H */