pci.h 71.0 KB
Newer Older
L
Linus Torvalds 已提交
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19
/*
 *	pci.h
 *
 *	PCI defines and function prototypes
 *	Copyright 1994, Drew Eckhardt
 *	Copyright 1997--1999 Martin Mares <mj@ucw.cz>
 *
 *	For more information, please consult the following manuals (look at
 *	http://www.pcisig.com/ for how to get them):
 *
 *	PCI BIOS Specification
 *	PCI Local Bus Specification
 *	PCI to PCI Bridge Specification
 *	PCI System Design Guide
 */
#ifndef LINUX_PCI_H
#define LINUX_PCI_H


20 21
#include <linux/mod_devicetable.h>

L
Linus Torvalds 已提交
22
#include <linux/types.h>
23
#include <linux/init.h>
L
Linus Torvalds 已提交
24 25
#include <linux/ioport.h>
#include <linux/list.h>
26
#include <linux/compiler.h>
L
Linus Torvalds 已提交
27
#include <linux/errno.h>
A
Alex Chiang 已提交
28
#include <linux/kobject.h>
29
#include <linux/atomic.h>
L
Linus Torvalds 已提交
30
#include <linux/device.h>
31
#include <linux/io.h>
32
#include <linux/resource_ext.h>
33
#include <uapi/linux/pci.h>
L
Linus Torvalds 已提交
34

35 36
#include <linux/pci_ids.h>

37 38 39 40 41 42 43
/*
 * The PCI interface treats multi-function devices as independent
 * devices.  The slot/function address of each device is encoded
 * in a single byte as follows:
 *
 *	7:3 = slot
 *	2:0 = function
44 45
 *
 * PCI_DEVFN(), PCI_SLOT(), and PCI_FUNC() are defined in uapi/linux/pci.h.
46
 * In the interest of not exposing interfaces to user-space unnecessarily,
47
 * the following kernel-only defines are being added here.
48
 */
49
#define PCI_DEVID(bus, devfn)  ((((u16)(bus)) << 8) | (devfn))
50 51 52
/* return bus from PCI devid = ((u16)bus_number) << 8) | devfn */
#define PCI_BUS_NUM(x) (((x) >> 8) & 0xff)

A
Alex Chiang 已提交
53 54 55 56 57 58 59 60 61
/* pci_slot represents a physical slot */
struct pci_slot {
	struct pci_bus *bus;		/* The bus this slot is on */
	struct list_head list;		/* node in list of slots on this bus */
	struct hotplug_slot *hotplug;	/* Hotplug info (migrate over time) */
	unsigned char number;		/* PCI_SLOT(pci_dev->devfn) */
	struct kobject kobj;
};

62 63 64 65 66
static inline const char *pci_slot_name(const struct pci_slot *slot)
{
	return kobject_name(&slot->kobj);
}

L
Linus Torvalds 已提交
67 68 69 70 71 72
/* File state for mmap()s on /proc/bus/pci/X/Y */
enum pci_mmap_state {
	pci_mmap_io,
	pci_mmap_mem
};

73 74 75 76 77 78 79 80 81 82 83
/*
 *  For PCI devices, the region numbers are assigned this way:
 */
enum {
	/* #0-5: standard PCI resources */
	PCI_STD_RESOURCES,
	PCI_STD_RESOURCE_END = 5,

	/* #6: expansion ROM resource */
	PCI_ROM_RESOURCE,

84 85 86 87 88 89
	/* device specific resources */
#ifdef CONFIG_PCI_IOV
	PCI_IOV_RESOURCES,
	PCI_IOV_RESOURCE_END = PCI_IOV_RESOURCES + PCI_SRIOV_NUM_BARS - 1,
#endif

90 91 92 93 94 95 96 97 98 99 100
	/* resources assigned to buses behind the bridge */
#define PCI_BRIDGE_RESOURCE_NUM 4

	PCI_BRIDGE_RESOURCES,
	PCI_BRIDGE_RESOURCE_END = PCI_BRIDGE_RESOURCES +
				  PCI_BRIDGE_RESOURCE_NUM - 1,

	/* total resources associated with a PCI device */
	PCI_NUM_RESOURCES,

	/* preserve this for compatibility */
101
	DEVICE_COUNT_RESOURCE = PCI_NUM_RESOURCES,
102
};
L
Linus Torvalds 已提交
103 104 105

typedef int __bitwise pci_power_t;

106 107 108
#define PCI_D0		((pci_power_t __force) 0)
#define PCI_D1		((pci_power_t __force) 1)
#define PCI_D2		((pci_power_t __force) 2)
L
Linus Torvalds 已提交
109 110
#define PCI_D3hot	((pci_power_t __force) 3)
#define PCI_D3cold	((pci_power_t __force) 4)
111
#define PCI_UNKNOWN	((pci_power_t __force) 5)
112
#define PCI_POWER_ERROR	((pci_power_t __force) -1)
L
Linus Torvalds 已提交
113

114 115 116 117 118 119 120 121
/* Remember to update this when the list above changes! */
extern const char *pci_power_names[];

static inline const char *pci_power_name(pci_power_t state)
{
	return pci_power_names[1 + (int) state];
}

122 123 124 125
#define PCI_PM_D2_DELAY		200
#define PCI_PM_D3_WAIT		10
#define PCI_PM_D3COLD_WAIT	100
#define PCI_PM_BUS_WAIT		50
126

127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143
/** The pci_channel state describes connectivity between the CPU and
 *  the pci device.  If some PCI bus between here and the pci device
 *  has crashed or locked up, this info is reflected here.
 */
typedef unsigned int __bitwise pci_channel_state_t;

enum pci_channel_state {
	/* I/O channel is in normal state */
	pci_channel_io_normal = (__force pci_channel_state_t) 1,

	/* I/O to channel is blocked */
	pci_channel_io_frozen = (__force pci_channel_state_t) 2,

	/* PCI card is dead */
	pci_channel_io_perm_failure = (__force pci_channel_state_t) 3,
};

B
Brian King 已提交
144 145 146 147 148 149
typedef unsigned int __bitwise pcie_reset_state_t;

enum pcie_reset_state {
	/* Reset is NOT asserted (Use to deassert reset) */
	pcie_deassert_reset = (__force pcie_reset_state_t) 1,

150
	/* Use #PERST to reset PCIe device */
B
Brian King 已提交
151 152
	pcie_warm_reset = (__force pcie_reset_state_t) 2,

153
	/* Use PCIe Hot Reset to reset device */
B
Brian King 已提交
154 155 156
	pcie_hot_reset = (__force pcie_reset_state_t) 3
};

157 158 159 160 161
typedef unsigned short __bitwise pci_dev_flags_t;
enum pci_dev_flags {
	/* INTX_DISABLE in PCI_COMMAND register disables MSI
	 * generation too.
	 */
162
	PCI_DEV_FLAGS_MSI_INTX_DISABLE_BUG = (__force pci_dev_flags_t) (1 << 0),
163
	/* Device configuration is irrevocably lost if disabled into D3 */
164
	PCI_DEV_FLAGS_NO_D3 = (__force pci_dev_flags_t) (1 << 1),
165
	/* Provide indication device is assigned by a Virtual Machine Manager */
166
	PCI_DEV_FLAGS_ASSIGNED = (__force pci_dev_flags_t) (1 << 2),
167
	/* Flag for quirk use to store if quirk-specific ACS is enabled */
168
	PCI_DEV_FLAGS_ACS_ENABLED_QUIRK = (__force pci_dev_flags_t) (1 << 3),
169 170
	/* Flag to indicate the device uses dma_alias_devfn */
	PCI_DEV_FLAGS_DMA_ALIAS_DEVFN = (__force pci_dev_flags_t) (1 << 4),
171 172
	/* Use a PCIe-to-PCI bridge alias even if !pci_is_pcie */
	PCI_DEV_FLAG_PCIE_BRIDGE_ALIAS = (__force pci_dev_flags_t) (1 << 5),
173 174
	/* Do not use bus resets for device */
	PCI_DEV_FLAGS_NO_BUS_RESET = (__force pci_dev_flags_t) (1 << 6),
175 176
	/* Do not use PM reset even if device advertises NoSoftRst- */
	PCI_DEV_FLAGS_NO_PM_RESET = (__force pci_dev_flags_t) (1 << 7),
177 178
	/* Get VPD from function 0 VPD */
	PCI_DEV_FLAGS_VPD_REF_F0 = (__force pci_dev_flags_t) (1 << 8),
179 180
};

181 182 183 184 185
enum pci_irq_reroute_variant {
	INTEL_IRQ_REROUTE_VARIANT = 1,
	MAX_IRQ_REROUTE_VARIANTS = 3
};

186 187
typedef unsigned short __bitwise pci_bus_flags_t;
enum pci_bus_flags {
188 189
	PCI_BUS_FLAGS_NO_MSI   = (__force pci_bus_flags_t) 1,
	PCI_BUS_FLAGS_NO_MMRBC = (__force pci_bus_flags_t) 2,
190 191
};

192 193 194 195 196 197 198 199 200 201 202 203 204
/* These values come from the PCI Express Spec */
enum pcie_link_width {
	PCIE_LNK_WIDTH_RESRV	= 0x00,
	PCIE_LNK_X1		= 0x01,
	PCIE_LNK_X2		= 0x02,
	PCIE_LNK_X4		= 0x04,
	PCIE_LNK_X8		= 0x08,
	PCIE_LNK_X12		= 0x0C,
	PCIE_LNK_X16		= 0x10,
	PCIE_LNK_X32		= 0x20,
	PCIE_LNK_WIDTH_UNKNOWN  = 0xFF,
};

205 206 207 208 209 210 211 212 213 214 215 216 217
/* Based on the PCI Hotplug Spec, but some values are made up by us */
enum pci_bus_speed {
	PCI_SPEED_33MHz			= 0x00,
	PCI_SPEED_66MHz			= 0x01,
	PCI_SPEED_66MHz_PCIX		= 0x02,
	PCI_SPEED_100MHz_PCIX		= 0x03,
	PCI_SPEED_133MHz_PCIX		= 0x04,
	PCI_SPEED_66MHz_PCIX_ECC	= 0x05,
	PCI_SPEED_100MHz_PCIX_ECC	= 0x06,
	PCI_SPEED_133MHz_PCIX_ECC	= 0x07,
	PCI_SPEED_66MHz_PCIX_266	= 0x09,
	PCI_SPEED_100MHz_PCIX_266	= 0x0a,
	PCI_SPEED_133MHz_PCIX_266	= 0x0b,
218 219 220 221 222
	AGP_UNKNOWN			= 0x0c,
	AGP_1X				= 0x0d,
	AGP_2X				= 0x0e,
	AGP_4X				= 0x0f,
	AGP_8X				= 0x10,
223 224 225 226 227
	PCI_SPEED_66MHz_PCIX_533	= 0x11,
	PCI_SPEED_100MHz_PCIX_533	= 0x12,
	PCI_SPEED_133MHz_PCIX_533	= 0x13,
	PCIE_SPEED_2_5GT		= 0x14,
	PCIE_SPEED_5_0GT		= 0x15,
228
	PCIE_SPEED_8_0GT		= 0x16,
229 230 231
	PCI_SPEED_UNKNOWN		= 0xff,
};

232
struct pci_cap_saved_data {
233 234
	u16 cap_nr;
	bool cap_extended;
235
	unsigned int size;
236 237 238
	u32 data[0];
};

239 240 241 242 243
struct pci_cap_saved_state {
	struct hlist_node next;
	struct pci_cap_saved_data cap;
};

244
struct pcie_link_state;
245
struct pci_vpd;
246
struct pci_sriov;
Y
Yu Zhao 已提交
247
struct pci_ats;
248

L
Linus Torvalds 已提交
249 250 251 252 253 254 255 256 257 258
/*
 * The pci_dev structure is used to describe PCI devices.
 */
struct pci_dev {
	struct list_head bus_list;	/* node in per-bus list */
	struct pci_bus	*bus;		/* bus this device is on */
	struct pci_bus	*subordinate;	/* bus this device bridges to */

	void		*sysdata;	/* hook for sys-specific extension */
	struct proc_dir_entry *procent;	/* device entry in /proc/bus/pci */
A
Alex Chiang 已提交
259
	struct pci_slot	*slot;		/* Physical slot this device is in */
L
Linus Torvalds 已提交
260 261 262 263 264 265 266

	unsigned int	devfn;		/* encoded device & function index */
	unsigned short	vendor;
	unsigned short	device;
	unsigned short	subsystem_vendor;
	unsigned short	subsystem_device;
	unsigned int	class;		/* 3 bytes: (base,sub,prog-if) */
267
	u8		revision;	/* PCI revision, low byte of class word */
L
Linus Torvalds 已提交
268
	u8		hdr_type;	/* PCI header type (`multi' flag masked out) */
269
	u8		pcie_cap;	/* PCIe capability offset */
270 271
	u8		msi_cap;	/* MSI capability offset */
	u8		msix_cap;	/* MSI-X capability offset */
272
	u8		pcie_mpss:3;	/* PCIe Max Payload Size Supported */
L
Linus Torvalds 已提交
273
	u8		rom_base_reg;	/* which config register controls the ROM */
274 275
	u8		pin;		/* which interrupt pin this device uses */
	u16		pcie_flags_reg;	/* cached PCIe Capabilities Register */
276
	u8		dma_alias_devfn;/* devfn of DMA alias, if any */
L
Linus Torvalds 已提交
277 278 279 280 281 282 283 284

	struct pci_driver *driver;	/* which driver has allocated this device */
	u64		dma_mask;	/* Mask of the bits of bus address this
					   device implements.  Normally this is
					   0xffffffff.  You only need to change
					   this if your device has broken DMA
					   or supports 64-bit transfers.  */

285 286
	struct device_dma_parameters dma_parms;

L
Linus Torvalds 已提交
287 288 289
	pci_power_t     current_state;  /* Current operating state. In ACPI-speak,
					   this is D0-D3, D0 being fully functional,
					   and D3 being off. */
290
	u8		pm_cap;		/* PM capability offset */
291 292
	unsigned int	pme_support:5;	/* Bitmask of states from which PME#
					   can be generated */
293
	unsigned int	pme_interrupt:1;
294
	unsigned int	pme_poll:1;	/* Poll device's PME status bit */
295 296
	unsigned int	d1_support:1;	/* Low power state D1 is supported */
	unsigned int	d2_support:1;	/* Low power state D2 is supported */
297 298 299
	unsigned int	no_d1d2:1;	/* D1 and D2 are forbidden */
	unsigned int	no_d3cold:1;	/* D3cold is forbidden */
	unsigned int	d3cold_allowed:1;	/* D3cold is allowed by user */
300 301
	unsigned int	mmio_always_on:1;	/* disallow turning off io/mem
						   decoding during bar sizing */
302
	unsigned int	wakeup_prepared:1;
303 304 305 306
	unsigned int	runtime_d3cold:1;	/* whether go through runtime
						   D3cold, not set for devices
						   powered on/off by the
						   corresponding bridge */
307
	unsigned int	ignore_hotplug:1;	/* Ignore hotplug events */
308
	unsigned int	d3_delay;	/* D3->D0 transition time in ms */
309
	unsigned int	d3cold_delay;	/* D3cold->D0 transition time in ms */
L
Linus Torvalds 已提交
310

311
#ifdef CONFIG_PCIEASPM
312
	struct pcie_link_state	*link_state;	/* ASPM link state */
313 314
#endif

315
	pci_channel_state_t error_state;	/* current connectivity state */
L
Linus Torvalds 已提交
316 317 318 319 320 321 322 323 324 325 326
	struct	device	dev;		/* Generic device interface */

	int		cfg_size;	/* Size of configuration space */

	/*
	 * Instead of touching interrupt line and base address registers
	 * directly, use the values stored here. They might be different!
	 */
	unsigned int	irq;
	struct resource resource[DEVICE_COUNT_RESOURCE]; /* I/O and memory regions + expansion ROMs */

327
	bool match_driver;		/* Skip attaching driver */
L
Linus Torvalds 已提交
328
	/* These fields are used by common fixups */
329
	unsigned int	transparent:1;	/* Subtractive decode PCI bridge */
L
Linus Torvalds 已提交
330 331
	unsigned int	multifunction:1;/* Part of multi-function device */
	/* keep track of device state */
332
	unsigned int	is_added:1;
L
Linus Torvalds 已提交
333
	unsigned int	is_busmaster:1; /* device is busmaster */
334
	unsigned int	no_msi:1;	/* device may not use msi */
335
	unsigned int	no_64bit_msi:1; /* device may only use 32-bit MSIs */
336
	unsigned int	block_cfg_access:1;	/* config space access is blocked */
337
	unsigned int	broken_parity_status:1;	/* Device generates false positive parity */
338
	unsigned int	irq_reroute_variant:2;	/* device needs IRQ rerouting variant */
339
	unsigned int	msi_enabled:1;
340
	unsigned int	msix_enabled:1;
341
	unsigned int	ari_enabled:1;	/* ARI forwarding */
342
	unsigned int	ats_enabled:1;	/* Address Translation Service */
343
	unsigned int	is_managed:1;
344
	unsigned int    needs_freset:1; /* Dev requires fundamental reset */
345
	unsigned int	state_saved:1;
346
	unsigned int	is_physfn:1;
347
	unsigned int	is_virtfn:1;
348
	unsigned int	reset_fn:1;
349
	unsigned int    is_hotplug_bridge:1;
350 351
	unsigned int    __aer_firmware_first_valid:1;
	unsigned int	__aer_firmware_first:1;
352
	unsigned int	broken_intx_masking:1;
353
	unsigned int	io_window_1k:1;	/* Intel P2P bridge 1K I/O windows */
354
	unsigned int	irq_managed:1;
355
	unsigned int	has_secondary_link:1;
356
	pci_dev_flags_t dev_flags;
357
	atomic_t	enable_cnt;	/* pci_enable_device has been called */
358

L
Linus Torvalds 已提交
359
	u32		saved_config_space[16]; /* config space saved at suspend time */
360
	struct hlist_head saved_cap_space;
L
Linus Torvalds 已提交
361 362 363
	struct bin_attribute *rom_attr; /* attribute descriptor for sysfs ROM entry */
	int rom_attr_enabled;		/* has display of the rom attribute been enabled? */
	struct bin_attribute *res_attr[DEVICE_COUNT_RESOURCE]; /* sysfs file for resources */
364
	struct bin_attribute *res_attr_wc[DEVICE_COUNT_RESOURCE]; /* sysfs file for WC mapping of resources */
365
#ifdef CONFIG_PCI_MSI
366
	const struct attribute_group **msi_irq_groups;
367
#endif
368
	struct pci_vpd *vpd;
369
#ifdef CONFIG_PCI_ATS
370 371 372 373
	union {
		struct pci_sriov *sriov;	/* SR-IOV capability related */
		struct pci_dev *physfn;	/* the PF this VF is associated with */
	};
374 375
	u16		ats_cap;	/* ATS Capability offset */
	u8		ats_stu;	/* ATS Smallest Translation Unit */
376
	atomic_t	ats_ref_cnt;	/* number of VFs with ATS enabled */
377
#endif
378
	phys_addr_t rom; /* Physical address of ROM if it's not from the BAR */
379
	size_t romlen; /* Length of ROM if it's not from the BAR */
380
	char *driver_override; /* Driver name to force a match */
L
Linus Torvalds 已提交
381 382
};

383 384 385 386 387 388 389 390 391
static inline struct pci_dev *pci_physfn(struct pci_dev *dev)
{
#ifdef CONFIG_PCI_IOV
	if (dev->is_virtfn)
		dev = dev->physfn;
#endif
	return dev;
}

392
struct pci_dev *pci_alloc_dev(struct pci_bus *bus);
393

L
Linus Torvalds 已提交
394 395 396
#define	to_pci_dev(n) container_of(n, struct pci_dev, dev)
#define for_each_pci_dev(d) while ((d = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, d)) != NULL)

397 398 399 400 401
static inline int pci_channel_offline(struct pci_dev *pdev)
{
	return (pdev->error_state != pci_channel_io_normal);
}

402
struct pci_host_bridge {
403
	struct device dev;
404
	struct pci_bus *bus;		/* root bus */
405
	struct list_head windows;	/* resource_entry */
406 407
	void (*release_fn)(struct pci_host_bridge *);
	void *release_data;
408
	unsigned int ignore_reset_delay:1;	/* for entire hierarchy */
409 410 411 412 413 414
	/* Resource alignment requirements */
	resource_size_t (*align_resource)(struct pci_dev *dev,
			const struct resource *res,
			resource_size_t start,
			resource_size_t size,
			resource_size_t align);
415
};
416

417
#define	to_pci_host_bridge(n) container_of(n, struct pci_host_bridge, dev)
418 419 420

struct pci_host_bridge *pci_find_host_bridge(struct pci_bus *bus);

421 422 423
void pci_set_host_bridge_release(struct pci_host_bridge *bridge,
		     void (*release_fn)(struct pci_host_bridge *),
		     void *release_data);
424

425 426
int pcibios_root_bridge_prepare(struct pci_host_bridge *bridge);

427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446
/*
 * The first PCI_BRIDGE_RESOURCE_NUM PCI bus resources (those that correspond
 * to P2P or CardBus bridge windows) go in a table.  Additional ones (for
 * buses below host bridges or subtractive decode bridges) go in the list.
 * Use pci_bus_for_each_resource() to iterate through all the resources.
 */

/*
 * PCI_SUBTRACTIVE_DECODE means the bridge forwards the window implicitly
 * and there's no way to program the bridge with the details of the window.
 * This does not apply to ACPI _CRS windows, even with the _DEC subtractive-
 * decode bit set, because they are explicit and can be programmed with _SRS.
 */
#define PCI_SUBTRACTIVE_DECODE	0x1

struct pci_bus_resource {
	struct list_head list;
	struct resource *res;
	unsigned int flags;
};
447 448

#define PCI_REGION_FLAG_MASK	0x0fU	/* These bits of resource flags tell us the PCI region flags */
L
Linus Torvalds 已提交
449 450 451 452 453 454 455

struct pci_bus {
	struct list_head node;		/* node in list of buses */
	struct pci_bus	*parent;	/* parent bus this bridge is on */
	struct list_head children;	/* list of child buses */
	struct list_head devices;	/* list of devices on this bus */
	struct pci_dev	*self;		/* bridge device as seen by parent */
456 457
	struct list_head slots;		/* list of slots on this bus;
					   protected by pci_slot_mutex */
458 459
	struct resource *resource[PCI_BRIDGE_RESOURCE_NUM];
	struct list_head resources;	/* address space routed to this bus */
460
	struct resource busn_res;	/* bus numbers routed to this bus */
L
Linus Torvalds 已提交
461 462

	struct pci_ops	*ops;		/* configuration access functions */
463
	struct msi_controller *msi;	/* MSI controller */
L
Linus Torvalds 已提交
464 465 466 467 468
	void		*sysdata;	/* hook for sys-specific extension */
	struct proc_dir_entry *procdir;	/* directory entry in /proc/bus/pci */

	unsigned char	number;		/* bus number */
	unsigned char	primary;	/* number of primary bridge */
469 470
	unsigned char	max_bus_speed;	/* enum pci_bus_speed */
	unsigned char	cur_bus_speed;	/* enum pci_bus_speed */
471 472 473
#ifdef CONFIG_PCI_DOMAINS_GENERIC
	int		domain_nr;
#endif
L
Linus Torvalds 已提交
474 475 476 477

	char		name[48];

	unsigned short  bridge_ctl;	/* manage NO_ISA/FBB/et al behaviors */
478
	pci_bus_flags_t bus_flags;	/* inherited by child buses */
L
Linus Torvalds 已提交
479
	struct device		*bridge;
480
	struct device		dev;
L
Linus Torvalds 已提交
481 482
	struct bin_attribute	*legacy_io; /* legacy I/O for this bus */
	struct bin_attribute	*legacy_mem; /* legacy mem */
483
	unsigned int		is_added:1;
L
Linus Torvalds 已提交
484 485
};

486
#define to_pci_bus(n)	container_of(n, struct pci_bus, dev)
L
Linus Torvalds 已提交
487

488
/*
489
 * Returns true if the PCI bus is root (behind host-PCI bridge),
490
 * false otherwise
491 492 493 494
 *
 * Some code assumes that "bus->self == NULL" means that bus is a root bus.
 * This is incorrect because "virtual" buses added for SR-IOV (via
 * virtfn_add_bus()) have "bus->self == NULL" but are not root buses.
495 496 497 498 499 500
 */
static inline bool pci_is_root_bus(struct pci_bus *pbus)
{
	return !(pbus->parent);
}

501 502 503 504 505 506 507 508 509 510 511 512 513
/**
 * pci_is_bridge - check if the PCI device is a bridge
 * @dev: PCI device
 *
 * Return true if the PCI device is bridge whether it has subordinate
 * or not.
 */
static inline bool pci_is_bridge(struct pci_dev *dev)
{
	return dev->hdr_type == PCI_HEADER_TYPE_BRIDGE ||
		dev->hdr_type == PCI_HEADER_TYPE_CARDBUS;
}

514 515 516 517 518 519 520 521 522
static inline struct pci_dev *pci_upstream_bridge(struct pci_dev *dev)
{
	dev = pci_physfn(dev);
	if (pci_is_root_bus(dev->bus))
		return NULL;

	return dev->bus->self;
}

523 524 525
struct device *pci_get_host_bridge_device(struct pci_dev *dev);
void pci_put_host_bridge_device(struct device *dev);

526 527 528 529 530 531 532 533 534
#ifdef CONFIG_PCI_MSI
static inline bool pci_dev_msi_enabled(struct pci_dev *pci_dev)
{
	return pci_dev->msi_enabled || pci_dev->msix_enabled;
}
#else
static inline bool pci_dev_msi_enabled(struct pci_dev *pci_dev) { return false; }
#endif

L
Linus Torvalds 已提交
535 536 537 538 539 540 541 542 543 544 545
/*
 * Error values that may be returned by PCI functions.
 */
#define PCIBIOS_SUCCESSFUL		0x00
#define PCIBIOS_FUNC_NOT_SUPPORTED	0x81
#define PCIBIOS_BAD_VENDOR_ID		0x83
#define PCIBIOS_DEVICE_NOT_FOUND	0x86
#define PCIBIOS_BAD_REGISTER_NUMBER	0x87
#define PCIBIOS_SET_FAILED		0x88
#define PCIBIOS_BUFFER_TOO_SMALL	0x89

546
/*
547
 * Translate above to generic errno for passing back through non-PCI code.
548 549 550 551 552 553 554 555 556 557
 */
static inline int pcibios_err_to_errno(int err)
{
	if (err <= PCIBIOS_SUCCESSFUL)
		return err; /* Assume already errno */

	switch (err) {
	case PCIBIOS_FUNC_NOT_SUPPORTED:
		return -ENOENT;
	case PCIBIOS_BAD_VENDOR_ID:
558
		return -ENOTTY;
559 560 561 562 563 564 565 566 567 568
	case PCIBIOS_DEVICE_NOT_FOUND:
		return -ENODEV;
	case PCIBIOS_BAD_REGISTER_NUMBER:
		return -EFAULT;
	case PCIBIOS_SET_FAILED:
		return -EIO;
	case PCIBIOS_BUFFER_TOO_SMALL:
		return -ENOSPC;
	}

569
	return -ERANGE;
570 571
}

L
Linus Torvalds 已提交
572 573 574
/* Low-level architecture-dependent routines */

struct pci_ops {
575 576
	int (*add_bus)(struct pci_bus *bus);
	void (*remove_bus)(struct pci_bus *bus);
577
	void __iomem *(*map_bus)(struct pci_bus *bus, unsigned int devfn, int where);
L
Linus Torvalds 已提交
578 579 580 581
	int (*read)(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 *val);
	int (*write)(struct pci_bus *bus, unsigned int devfn, int where, int size, u32 val);
};

582 583 584 585
/*
 * ACPI needs to be able to access PCI config space before we've done a
 * PCI bus scan and created pci_bus structures.
 */
586 587 588 589
int raw_pci_read(unsigned int domain, unsigned int bus, unsigned int devfn,
		 int reg, int len, u32 *val);
int raw_pci_write(unsigned int domain, unsigned int bus, unsigned int devfn,
		  int reg, int len, u32 val);
L
Linus Torvalds 已提交
590

Y
Yinghai Lu 已提交
591 592 593 594 595 596
#ifdef CONFIG_PCI_BUS_ADDR_T_64BIT
typedef u64 pci_bus_addr_t;
#else
typedef u32 pci_bus_addr_t;
#endif

L
Linus Torvalds 已提交
597
struct pci_bus_region {
Y
Yinghai Lu 已提交
598 599
	pci_bus_addr_t start;
	pci_bus_addr_t end;
L
Linus Torvalds 已提交
600 601 602 603 604 605 606
};

struct pci_dynids {
	spinlock_t lock;            /* protects list, index */
	struct list_head list;      /* for IDs added at runtime */
};

607 608 609 610 611 612

/*
 * PCI Error Recovery System (PCI-ERS).  If a PCI device driver provides
 * a set of callbacks in struct pci_error_handlers, that device driver
 * will be notified of PCI bus errors, and will be driven to recovery
 * when an error occurs.
613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631
 */

typedef unsigned int __bitwise pci_ers_result_t;

enum pci_ers_result {
	/* no result/none/not supported in device driver */
	PCI_ERS_RESULT_NONE = (__force pci_ers_result_t) 1,

	/* Device driver can recover without slot reset */
	PCI_ERS_RESULT_CAN_RECOVER = (__force pci_ers_result_t) 2,

	/* Device driver wants slot to be reset. */
	PCI_ERS_RESULT_NEED_RESET = (__force pci_ers_result_t) 3,

	/* Device has completely failed, is unrecoverable */
	PCI_ERS_RESULT_DISCONNECT = (__force pci_ers_result_t) 4,

	/* Device driver is fully recovered and operational */
	PCI_ERS_RESULT_RECOVERED = (__force pci_ers_result_t) 5,
632 633 634

	/* No AER capabilities registered for the driver */
	PCI_ERS_RESULT_NO_AER_DRIVER = (__force pci_ers_result_t) 6,
635 636 637
};

/* PCI bus error event callbacks */
638
struct pci_error_handlers {
639 640
	/* PCI bus error detected on this device */
	pci_ers_result_t (*error_detected)(struct pci_dev *dev,
641
					   enum pci_channel_state error);
642 643 644 645 646 647 648 649 650 651

	/* MMIO has been re-enabled, but not DMA */
	pci_ers_result_t (*mmio_enabled)(struct pci_dev *dev);

	/* PCI Express link has been reset */
	pci_ers_result_t (*link_reset)(struct pci_dev *dev);

	/* PCI slot has been reset */
	pci_ers_result_t (*slot_reset)(struct pci_dev *dev);

652 653 654
	/* PCI function reset prepare or completed */
	void (*reset_notify)(struct pci_dev *dev, bool prepare);

655 656 657 658 659
	/* Device driver may resume normal operations */
	void (*resume)(struct pci_dev *dev);
};


L
Linus Torvalds 已提交
660 661 662
struct module;
struct pci_driver {
	struct list_head node;
663
	const char *name;
L
Linus Torvalds 已提交
664 665 666 667
	const struct pci_device_id *id_table;	/* must be non-NULL for probe to be called */
	int  (*probe)  (struct pci_dev *dev, const struct pci_device_id *id);	/* New device inserted */
	void (*remove) (struct pci_dev *dev);	/* Device removed (NULL if not a hot-plug capable driver) */
	int  (*suspend) (struct pci_dev *dev, pm_message_t state);	/* Device suspended */
668 669
	int  (*suspend_late) (struct pci_dev *dev, pm_message_t state);
	int  (*resume_early) (struct pci_dev *dev);
L
Linus Torvalds 已提交
670
	int  (*resume) (struct pci_dev *dev);	                /* Device woken up */
671
	void (*shutdown) (struct pci_dev *dev);
672
	int (*sriov_configure) (struct pci_dev *dev, int num_vfs); /* PF pdev */
673
	const struct pci_error_handlers *err_handler;
L
Linus Torvalds 已提交
674 675 676 677
	struct device_driver	driver;
	struct pci_dynids dynids;
};

678
#define	to_pci_driver(drv) container_of(drv, struct pci_driver, driver)
L
Linus Torvalds 已提交
679

680
/**
681
 * DEFINE_PCI_DEVICE_TABLE - macro used to describe a pci device table
682 683
 * @_table: device table name
 *
684
 * This macro is deprecated and should not be used in new code.
685
 */
686
#define DEFINE_PCI_DEVICE_TABLE(_table) \
687
	const struct pci_device_id _table[]
688

L
Linus Torvalds 已提交
689 690 691 692 693 694 695 696 697 698 699 700 701
/**
 * PCI_DEVICE - macro used to describe a specific pci device
 * @vend: the 16 bit PCI Vendor ID
 * @dev: the 16 bit PCI Device ID
 *
 * This macro is used to create a struct pci_device_id that matches a
 * specific device.  The subvendor and subdevice fields will be set to
 * PCI_ANY_ID.
 */
#define PCI_DEVICE(vend,dev) \
	.vendor = (vend), .device = (dev), \
	.subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID

702 703 704 705 706 707 708 709 710 711 712 713 714 715
/**
 * PCI_DEVICE_SUB - macro used to describe a specific pci device with subsystem
 * @vend: the 16 bit PCI Vendor ID
 * @dev: the 16 bit PCI Device ID
 * @subvend: the 16 bit PCI Subvendor ID
 * @subdev: the 16 bit PCI Subdevice ID
 *
 * This macro is used to create a struct pci_device_id that matches a
 * specific device with subsystem information.
 */
#define PCI_DEVICE_SUB(vend, dev, subvend, subdev) \
	.vendor = (vend), .device = (dev), \
	.subvendor = (subvend), .subdevice = (subdev)

L
Linus Torvalds 已提交
716 717 718 719 720 721
/**
 * PCI_DEVICE_CLASS - macro used to describe a specific pci device class
 * @dev_class: the class, subclass, prog-if triple for this device
 * @dev_class_mask: the class mask for this device
 *
 * This macro is used to create a struct pci_device_id that matches a
722
 * specific PCI class.  The vendor, device, subvendor, and subdevice
L
Linus Torvalds 已提交
723 724 725 726 727 728 729
 * fields will be set to PCI_ANY_ID.
 */
#define PCI_DEVICE_CLASS(dev_class,dev_class_mask) \
	.class = (dev_class), .class_mask = (dev_class_mask), \
	.vendor = PCI_ANY_ID, .device = PCI_ANY_ID, \
	.subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID

730 731
/**
 * PCI_VDEVICE - macro used to describe a specific pci device in short form
732 733
 * @vend: the vendor name
 * @dev: the 16 bit PCI Device ID
734 735 736 737 738 739 740
 *
 * This macro is used to create a struct pci_device_id that matches a
 * specific PCI device.  The subvendor, and subdevice fields will be set
 * to PCI_ANY_ID. The macro allows the next field to follow as the device
 * private data.
 */

741 742 743
#define PCI_VDEVICE(vend, dev) \
	.vendor = PCI_VENDOR_ID_##vend, .device = (dev), \
	.subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID, 0, 0
744

745 746 747 748 749 750 751 752 753 754
enum {
	PCI_REASSIGN_ALL_RSRC	= 0x00000001,	/* ignore firmware setup */
	PCI_REASSIGN_ALL_BUS	= 0x00000002,	/* reassign all bus numbers */
	PCI_PROBE_ONLY		= 0x00000004,	/* use existing setup */
	PCI_CAN_SKIP_ISA_ALIGN	= 0x00000008,	/* don't do ISA alignment */
	PCI_ENABLE_PROC_DOMAINS	= 0x00000010,	/* enable domains in /proc */
	PCI_COMPAT_DOMAIN_0	= 0x00000020,	/* ... except domain 0 */
	PCI_SCAN_ALL_PCIE_DEVS	= 0x00000040,	/* scan all, not just dev 0 */
};

L
Linus Torvalds 已提交
755 756 757
/* these external functions are only available when PCI support is enabled */
#ifdef CONFIG_PCI

758 759 760 761 762 763 764
extern unsigned int pci_flags;

static inline void pci_set_flags(int flags) { pci_flags = flags; }
static inline void pci_add_flags(int flags) { pci_flags |= flags; }
static inline void pci_clear_flags(int flags) { pci_flags &= ~flags; }
static inline int pci_has_flag(int flag) { return pci_flags & flag; }

765
void pcie_bus_configure_settings(struct pci_bus *bus);
766 767

enum pcie_bus_config_types {
768 769 770 771 772
	PCIE_BUS_TUNE_OFF,	/* don't touch MPS at all */
	PCIE_BUS_DEFAULT,	/* ensure MPS matches upstream bridge */
	PCIE_BUS_SAFE,		/* use largest MPS boot-time devices support */
	PCIE_BUS_PERFORMANCE,	/* use MPS and MRRS for best performance */
	PCIE_BUS_PEER2PEER,	/* set MPS = 128 for all devices */
773 774 775 776
};

extern enum pcie_bus_config_types pcie_bus_config;

L
Linus Torvalds 已提交
777 778
extern struct bus_type pci_bus_type;

779 780
/* Do NOT directly access these two variables, unless you are arch-specific PCI
 * code, or PCI core code. */
L
Linus Torvalds 已提交
781
extern struct list_head pci_root_buses;	/* list of all known PCI buses */
782
/* Some device drivers need know if PCI is initiated */
783
int no_pci_devices(void);
L
Linus Torvalds 已提交
784

785
void pcibios_resource_survey_bus(struct pci_bus *bus);
786 787
void pcibios_add_bus(struct pci_bus *bus);
void pcibios_remove_bus(struct pci_bus *bus);
L
Linus Torvalds 已提交
788
void pcibios_fixup_bus(struct pci_bus *);
789
int __must_check pcibios_enable_device(struct pci_dev *, int mask);
790
/* Architecture-specific versions may override this (weak) */
791
char *pcibios_setup(char *str);
L
Linus Torvalds 已提交
792 793

/* Used only when drivers/pci/setup.c is used */
794
resource_size_t pcibios_align_resource(void *, const struct resource *,
795
				resource_size_t,
796
				resource_size_t);
L
Linus Torvalds 已提交
797 798
void pcibios_update_irq(struct pci_dev *, int irq);

799 800 801
/* Weak but can be overriden by arch */
void pci_fixup_cardbus(struct pci_bus *);

L
Linus Torvalds 已提交
802 803
/* Generic PCI functions used internally */

804
void pcibios_resource_to_bus(struct pci_bus *bus, struct pci_bus_region *region,
805
			     struct resource *res);
806
void pcibios_bus_to_resource(struct pci_bus *bus, struct resource *res,
807
			     struct pci_bus_region *region);
808
void pcibios_scan_specific_bus(int busn);
809
struct pci_bus *pci_find_bus(int domain, int busnr);
810
void pci_bus_add_devices(const struct pci_bus *bus);
811
struct pci_bus *pci_scan_bus(int bus, struct pci_ops *ops, void *sysdata);
812 813 814
struct pci_bus *pci_create_root_bus(struct device *parent, int bus,
				    struct pci_ops *ops, void *sysdata,
				    struct list_head *resources);
815 816 817
int pci_bus_insert_busn_res(struct pci_bus *b, int bus, int busmax);
int pci_bus_update_busn_res_end(struct pci_bus *b, int busmax);
void pci_bus_release_busn_res(struct pci_bus *b);
818 819 820 821
struct pci_bus *pci_scan_root_bus_msi(struct device *parent, int bus,
				      struct pci_ops *ops, void *sysdata,
				      struct list_head *resources,
				      struct msi_controller *msi);
822
struct pci_bus *pci_scan_root_bus(struct device *parent, int bus,
823 824
					     struct pci_ops *ops, void *sysdata,
					     struct list_head *resources);
825 826
struct pci_bus *pci_add_new_bus(struct pci_bus *parent, struct pci_dev *dev,
				int busnr);
827
void pcie_update_link_speed(struct pci_bus *bus, u16 link_status);
A
Alex Chiang 已提交
828
struct pci_slot *pci_create_slot(struct pci_bus *parent, int slot_nr,
829 830
				 const char *name,
				 struct hotplug_slot *hotplug);
A
Alex Chiang 已提交
831
void pci_destroy_slot(struct pci_slot *slot);
832 833 834 835 836
#ifdef CONFIG_SYSFS
void pci_dev_assign_slot(struct pci_dev *dev);
#else
static inline void pci_dev_assign_slot(struct pci_dev *dev) { }
#endif
L
Linus Torvalds 已提交
837
int pci_scan_slot(struct pci_bus *bus, int devfn);
838
struct pci_dev *pci_scan_single_device(struct pci_bus *bus, int devfn);
839
void pci_device_add(struct pci_dev *dev, struct pci_bus *bus);
L
Linus Torvalds 已提交
840
unsigned int pci_scan_child_bus(struct pci_bus *bus);
841
void pci_bus_add_device(struct pci_dev *dev);
L
Linus Torvalds 已提交
842
void pci_read_bridge_bases(struct pci_bus *child);
843 844
struct resource *pci_find_parent_resource(const struct pci_dev *dev,
					  struct resource *res);
845
struct pci_dev *pci_find_pcie_root_port(struct pci_dev *dev);
846
u8 pci_swizzle_interrupt_pin(const struct pci_dev *dev, u8 pin);
L
Linus Torvalds 已提交
847
int pci_get_interrupt_pin(struct pci_dev *dev, struct pci_dev **bridge);
848
u8 pci_common_swizzle(struct pci_dev *dev, u8 *pinp);
849 850 851 852
struct pci_dev *pci_dev_get(struct pci_dev *dev);
void pci_dev_put(struct pci_dev *dev);
void pci_remove_bus(struct pci_bus *b);
void pci_stop_and_remove_bus_device(struct pci_dev *dev);
853
void pci_stop_and_remove_bus_device_locked(struct pci_dev *dev);
854 855
void pci_stop_root_bus(struct pci_bus *bus);
void pci_remove_root_bus(struct pci_bus *bus);
856
void pci_setup_cardbus(struct pci_bus *bus);
857
void pci_sort_breadthfirst(void);
858 859 860
#define dev_is_pci(d) ((d)->bus == &pci_bus_type)
#define dev_is_pf(d) ((dev_is_pci(d) ? to_pci_dev(d)->is_physfn : false))
#define dev_num_vf(d) ((dev_is_pci(d) ? pci_num_vf(to_pci_dev(d)) : 0))
L
Linus Torvalds 已提交
861 862 863

/* Generic PCI functions exported to card drivers */

864 865 866 867 868 869 870
enum pci_lost_interrupt_reason {
	PCI_LOST_IRQ_NO_INFORMATION = 0,
	PCI_LOST_IRQ_DISABLE_MSI,
	PCI_LOST_IRQ_DISABLE_MSIX,
	PCI_LOST_IRQ_DISABLE_ACPI,
};
enum pci_lost_interrupt_reason pci_lost_interrupt(struct pci_dev *dev);
871 872 873
int pci_find_capability(struct pci_dev *dev, int cap);
int pci_find_next_capability(struct pci_dev *dev, u8 pos, int cap);
int pci_find_ext_capability(struct pci_dev *dev, int cap);
874
int pci_find_next_ext_capability(struct pci_dev *dev, int pos, int cap);
875 876
int pci_find_ht_capability(struct pci_dev *dev, int ht_cap);
int pci_find_next_ht_capability(struct pci_dev *dev, int pos, int ht_cap);
877
struct pci_bus *pci_find_next_bus(const struct pci_bus *from);
L
Linus Torvalds 已提交
878

879 880
struct pci_dev *pci_get_device(unsigned int vendor, unsigned int device,
				struct pci_dev *from);
881
struct pci_dev *pci_get_subsys(unsigned int vendor, unsigned int device,
L
Linus Torvalds 已提交
882
				unsigned int ss_vendor, unsigned int ss_device,
883
				struct pci_dev *from);
884
struct pci_dev *pci_get_slot(struct pci_bus *bus, unsigned int devfn);
885 886 887 888 889 890 891
struct pci_dev *pci_get_domain_bus_and_slot(int domain, unsigned int bus,
					    unsigned int devfn);
static inline struct pci_dev *pci_get_bus_and_slot(unsigned int bus,
						   unsigned int devfn)
{
	return pci_get_domain_bus_and_slot(0, bus, devfn);
}
892
struct pci_dev *pci_get_class(unsigned int class, struct pci_dev *from);
L
Linus Torvalds 已提交
893 894
int pci_dev_present(const struct pci_device_id *ids);

895 896 897 898 899 900 901 902 903 904 905 906
int pci_bus_read_config_byte(struct pci_bus *bus, unsigned int devfn,
			     int where, u8 *val);
int pci_bus_read_config_word(struct pci_bus *bus, unsigned int devfn,
			     int where, u16 *val);
int pci_bus_read_config_dword(struct pci_bus *bus, unsigned int devfn,
			      int where, u32 *val);
int pci_bus_write_config_byte(struct pci_bus *bus, unsigned int devfn,
			      int where, u8 val);
int pci_bus_write_config_word(struct pci_bus *bus, unsigned int devfn,
			      int where, u16 val);
int pci_bus_write_config_dword(struct pci_bus *bus, unsigned int devfn,
			       int where, u32 val);
907 908 909 910 911 912 913 914 915 916

int pci_generic_config_read(struct pci_bus *bus, unsigned int devfn,
			    int where, int size, u32 *val);
int pci_generic_config_write(struct pci_bus *bus, unsigned int devfn,
			    int where, int size, u32 val);
int pci_generic_config_read32(struct pci_bus *bus, unsigned int devfn,
			      int where, int size, u32 *val);
int pci_generic_config_write32(struct pci_bus *bus, unsigned int devfn,
			       int where, int size, u32 val);

H
Huang Ying 已提交
917
struct pci_ops *pci_bus_set_ops(struct pci_bus *bus, struct pci_ops *ops);
L
Linus Torvalds 已提交
918

919
static inline int pci_read_config_byte(const struct pci_dev *dev, int where, u8 *val)
L
Linus Torvalds 已提交
920
{
921
	return pci_bus_read_config_byte(dev->bus, dev->devfn, where, val);
L
Linus Torvalds 已提交
922
}
923
static inline int pci_read_config_word(const struct pci_dev *dev, int where, u16 *val)
L
Linus Torvalds 已提交
924
{
925
	return pci_bus_read_config_word(dev->bus, dev->devfn, where, val);
L
Linus Torvalds 已提交
926
}
927
static inline int pci_read_config_dword(const struct pci_dev *dev, int where,
928
					u32 *val)
L
Linus Torvalds 已提交
929
{
930
	return pci_bus_read_config_dword(dev->bus, dev->devfn, where, val);
L
Linus Torvalds 已提交
931
}
932
static inline int pci_write_config_byte(const struct pci_dev *dev, int where, u8 val)
L
Linus Torvalds 已提交
933
{
934
	return pci_bus_write_config_byte(dev->bus, dev->devfn, where, val);
L
Linus Torvalds 已提交
935
}
936
static inline int pci_write_config_word(const struct pci_dev *dev, int where, u16 val)
L
Linus Torvalds 已提交
937
{
938
	return pci_bus_write_config_word(dev->bus, dev->devfn, where, val);
L
Linus Torvalds 已提交
939
}
940
static inline int pci_write_config_dword(const struct pci_dev *dev, int where,
941
					 u32 val)
L
Linus Torvalds 已提交
942
{
943
	return pci_bus_write_config_dword(dev->bus, dev->devfn, where, val);
L
Linus Torvalds 已提交
944 945
}

946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978
int pcie_capability_read_word(struct pci_dev *dev, int pos, u16 *val);
int pcie_capability_read_dword(struct pci_dev *dev, int pos, u32 *val);
int pcie_capability_write_word(struct pci_dev *dev, int pos, u16 val);
int pcie_capability_write_dword(struct pci_dev *dev, int pos, u32 val);
int pcie_capability_clear_and_set_word(struct pci_dev *dev, int pos,
				       u16 clear, u16 set);
int pcie_capability_clear_and_set_dword(struct pci_dev *dev, int pos,
					u32 clear, u32 set);

static inline int pcie_capability_set_word(struct pci_dev *dev, int pos,
					   u16 set)
{
	return pcie_capability_clear_and_set_word(dev, pos, 0, set);
}

static inline int pcie_capability_set_dword(struct pci_dev *dev, int pos,
					    u32 set)
{
	return pcie_capability_clear_and_set_dword(dev, pos, 0, set);
}

static inline int pcie_capability_clear_word(struct pci_dev *dev, int pos,
					     u16 clear)
{
	return pcie_capability_clear_and_set_word(dev, pos, clear, 0);
}

static inline int pcie_capability_clear_dword(struct pci_dev *dev, int pos,
					      u32 clear)
{
	return pcie_capability_clear_and_set_dword(dev, pos, clear, 0);
}

979 980 981 982 983 984 985 986
/* user-space driven config access */
int pci_user_read_config_byte(struct pci_dev *dev, int where, u8 *val);
int pci_user_read_config_word(struct pci_dev *dev, int where, u16 *val);
int pci_user_read_config_dword(struct pci_dev *dev, int where, u32 *val);
int pci_user_write_config_byte(struct pci_dev *dev, int where, u8 val);
int pci_user_write_config_word(struct pci_dev *dev, int where, u16 val);
int pci_user_write_config_dword(struct pci_dev *dev, int where, u32 val);

987
int __must_check pci_enable_device(struct pci_dev *dev);
988 989
int __must_check pci_enable_device_io(struct pci_dev *dev);
int __must_check pci_enable_device_mem(struct pci_dev *dev);
990
int __must_check pci_reenable_device(struct pci_dev *);
991 992 993
int __must_check pcim_enable_device(struct pci_dev *pdev);
void pcim_pin_device(struct pci_dev *pdev);

994 995 996 997 998
static inline int pci_is_enabled(struct pci_dev *pdev)
{
	return (atomic_read(&pdev->enable_cnt) > 0);
}

999 1000 1001 1002 1003
static inline int pci_is_managed(struct pci_dev *pdev)
{
	return pdev->is_managed;
}

1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020
static inline void pci_set_managed_irq(struct pci_dev *pdev, unsigned int irq)
{
	pdev->irq = irq;
	pdev->irq_managed = 1;
}

static inline void pci_reset_managed_irq(struct pci_dev *pdev)
{
	pdev->irq = 0;
	pdev->irq_managed = 0;
}

static inline bool pci_has_managed_irq(struct pci_dev *pdev)
{
	return pdev->irq_managed && pdev->irq > 0;
}

L
Linus Torvalds 已提交
1021
void pci_disable_device(struct pci_dev *dev);
1022 1023

extern unsigned int pcibios_max_latency;
L
Linus Torvalds 已提交
1024
void pci_set_master(struct pci_dev *dev);
1025
void pci_clear_master(struct pci_dev *dev);
1026

B
Brian King 已提交
1027
int pci_set_pcie_reset_state(struct pci_dev *dev, enum pcie_reset_state state);
1028
int pci_set_cacheline_size(struct pci_dev *dev);
L
Linus Torvalds 已提交
1029
#define HAVE_PCI_SET_MWI
1030
int __must_check pci_set_mwi(struct pci_dev *dev);
R
Randy Dunlap 已提交
1031
int pci_try_set_mwi(struct pci_dev *dev);
L
Linus Torvalds 已提交
1032
void pci_clear_mwi(struct pci_dev *dev);
1033
void pci_intx(struct pci_dev *dev, int enable);
1034 1035 1036
bool pci_intx_mask_supported(struct pci_dev *dev);
bool pci_check_and_mask_intx(struct pci_dev *dev);
bool pci_check_and_unmask_intx(struct pci_dev *dev);
1037
int pci_wait_for_pending(struct pci_dev *dev, int pos, u16 mask);
1038
int pci_wait_for_pending_transaction(struct pci_dev *dev);
1039 1040 1041
int pcix_get_max_mmrbc(struct pci_dev *dev);
int pcix_get_mmrbc(struct pci_dev *dev);
int pcix_set_mmrbc(struct pci_dev *dev, int mmrbc);
1042
int pcie_get_readrq(struct pci_dev *dev);
1043
int pcie_set_readrq(struct pci_dev *dev, int rq);
1044 1045
int pcie_get_mps(struct pci_dev *dev);
int pcie_set_mps(struct pci_dev *dev, int mps);
1046 1047
int pcie_get_minimum_link(struct pci_dev *dev, enum pci_bus_speed *speed,
			  enum pcie_link_width *width);
1048
int __pci_reset_function(struct pci_dev *dev);
1049
int __pci_reset_function_locked(struct pci_dev *dev);
1050
int pci_reset_function(struct pci_dev *dev);
1051
int pci_try_reset_function(struct pci_dev *dev);
1052
int pci_probe_reset_slot(struct pci_slot *slot);
1053
int pci_reset_slot(struct pci_slot *slot);
1054
int pci_try_reset_slot(struct pci_slot *slot);
1055
int pci_probe_reset_bus(struct pci_bus *bus);
1056
int pci_reset_bus(struct pci_bus *bus);
1057
int pci_try_reset_bus(struct pci_bus *bus);
1058 1059
void pci_reset_secondary_bus(struct pci_dev *dev);
void pcibios_reset_secondary_bus(struct pci_dev *dev);
1060
void pci_reset_bridge_secondary_bus(struct pci_dev *dev);
1061
void pci_update_resource(struct pci_dev *dev, int resno);
1062
int __must_check pci_assign_resource(struct pci_dev *dev, int i);
1063
int __must_check pci_reassign_resource(struct pci_dev *dev, int i, resource_size_t add_size, resource_size_t align);
1064
int pci_select_bars(struct pci_dev *dev, unsigned long flags);
1065
bool pci_device_is_present(struct pci_dev *pdev);
1066
void pci_ignore_hotplug(struct pci_dev *dev);
L
Linus Torvalds 已提交
1067 1068

/* ROM control related routines */
1069 1070
int pci_enable_rom(struct pci_dev *pdev);
void pci_disable_rom(struct pci_dev *pdev);
1071
void __iomem __must_check *pci_map_rom(struct pci_dev *pdev, size_t *size);
L
Linus Torvalds 已提交
1072
void pci_unmap_rom(struct pci_dev *pdev, void __iomem *rom);
1073
size_t pci_get_rom_size(struct pci_dev *pdev, void __iomem *rom, size_t size);
1074
void __iomem __must_check *pci_platform_rom(struct pci_dev *pdev, size_t *size);
L
Linus Torvalds 已提交
1075 1076 1077

/* Power management related routines */
int pci_save_state(struct pci_dev *dev);
1078
void pci_restore_state(struct pci_dev *dev);
1079
struct pci_saved_state *pci_store_saved_state(struct pci_dev *dev);
1080 1081
int pci_load_saved_state(struct pci_dev *dev,
			 struct pci_saved_state *state);
1082 1083
int pci_load_and_free_saved_state(struct pci_dev *dev,
				  struct pci_saved_state **state);
1084 1085 1086 1087 1088 1089
struct pci_cap_saved_state *pci_find_saved_cap(struct pci_dev *dev, char cap);
struct pci_cap_saved_state *pci_find_saved_ext_cap(struct pci_dev *dev,
						   u16 cap);
int pci_add_cap_save_buffer(struct pci_dev *dev, char cap, unsigned int size);
int pci_add_ext_cap_save_buffer(struct pci_dev *dev,
				u16 cap, unsigned int size);
1090
int __pci_complete_power_transition(struct pci_dev *dev, pci_power_t state);
1091 1092
int pci_set_power_state(struct pci_dev *dev, pci_power_t state);
pci_power_t pci_choose_state(struct pci_dev *dev, pm_message_t state);
1093
bool pci_pme_capable(struct pci_dev *dev, pci_power_t state);
1094
void pci_pme_active(struct pci_dev *dev, bool enable);
1095 1096
int __pci_enable_wake(struct pci_dev *dev, pci_power_t state,
		      bool runtime, bool enable);
1097
int pci_wake_from_d3(struct pci_dev *dev, bool enable);
1098 1099
int pci_prepare_to_sleep(struct pci_dev *dev);
int pci_back_from_sleep(struct pci_dev *dev);
1100
bool pci_dev_run_wake(struct pci_dev *dev);
1101 1102
bool pci_check_pme_status(struct pci_dev *dev);
void pci_pme_wakeup_bus(struct pci_bus *bus);
L
Linus Torvalds 已提交
1103

1104 1105 1106 1107 1108
static inline int pci_enable_wake(struct pci_dev *dev, pci_power_t state,
				  bool enable)
{
	return __pci_enable_wake(dev, state, false, enable);
}
L
Linus Torvalds 已提交
1109

1110 1111 1112 1113
/* PCI Virtual Channel */
int pci_save_vc_state(struct pci_dev *dev);
void pci_restore_vc_state(struct pci_dev *dev);
void pci_allocate_vc_save_buffers(struct pci_dev *dev);
1114

1115 1116 1117 1118
/* For use by arch with custom probe code */
void set_pcie_port_type(struct pci_dev *pdev);
void set_pcie_hotplug_bridge(struct pci_dev *pdev);

1119
/* Functions for PCI Hotplug drivers to use */
1120
int pci_bus_find_capability(struct pci_bus *bus, unsigned int devfn, int cap);
1121
unsigned int pci_rescan_bus_bridge_resize(struct pci_dev *bridge);
1122
unsigned int pci_rescan_bus(struct pci_bus *bus);
1123 1124
void pci_lock_rescan_remove(void);
void pci_unlock_rescan_remove(void);
1125

1126 1127 1128 1129
/* Vital product data routines */
ssize_t pci_read_vpd(struct pci_dev *dev, loff_t pos, size_t count, void *buf);
ssize_t pci_write_vpd(struct pci_dev *dev, loff_t pos, size_t count, const void *buf);

L
Linus Torvalds 已提交
1130
/* Helper functions for low-level code (drivers/pci/setup-[bus,res].c) */
1131
resource_size_t pcibios_retrieve_fw_addr(struct pci_dev *dev, int idx);
1132
void pci_bus_assign_resources(const struct pci_bus *bus);
L
Linus Torvalds 已提交
1133 1134
void pci_bus_size_bridges(struct pci_bus *bus);
int pci_claim_resource(struct pci_dev *, int);
1135
int pci_claim_bridge_resource(struct pci_dev *bridge, int i);
L
Linus Torvalds 已提交
1136
void pci_assign_unassigned_resources(void);
1137
void pci_assign_unassigned_bridge_resources(struct pci_dev *bridge);
1138
void pci_assign_unassigned_bus_resources(struct pci_bus *bus);
1139
void pci_assign_unassigned_root_bus_resources(struct pci_bus *bus);
L
Linus Torvalds 已提交
1140
void pdev_enable_device(struct pci_dev *);
1141
int pci_enable_resources(struct pci_dev *, int mask);
L
Linus Torvalds 已提交
1142
void pci_fixup_irqs(u8 (*)(struct pci_dev *, u8 *),
1143
		    int (*)(const struct pci_dev *, u8, u8));
L
Linus Torvalds 已提交
1144
#define HAVE_PCI_REQ_REGIONS	2
1145
int __must_check pci_request_regions(struct pci_dev *, const char *);
1146
int __must_check pci_request_regions_exclusive(struct pci_dev *, const char *);
L
Linus Torvalds 已提交
1147
void pci_release_regions(struct pci_dev *);
1148
int __must_check pci_request_region(struct pci_dev *, int, const char *);
1149
int __must_check pci_request_region_exclusive(struct pci_dev *, int, const char *);
L
Linus Torvalds 已提交
1150
void pci_release_region(struct pci_dev *, int);
1151
int pci_request_selected_regions(struct pci_dev *, int, const char *);
1152
int pci_request_selected_regions_exclusive(struct pci_dev *, int, const char *);
1153
void pci_release_selected_regions(struct pci_dev *, int);
L
Linus Torvalds 已提交
1154 1155

/* drivers/pci/bus.c */
1156 1157
struct pci_bus *pci_bus_get(struct pci_bus *bus);
void pci_bus_put(struct pci_bus *bus);
1158
void pci_add_resource(struct list_head *resources, struct resource *res);
1159 1160
void pci_add_resource_offset(struct list_head *resources, struct resource *res,
			     resource_size_t offset);
1161
void pci_free_resource_list(struct list_head *resources);
1162 1163 1164 1165
void pci_bus_add_resource(struct pci_bus *bus, struct resource *res, unsigned int flags);
struct resource *pci_bus_resource_n(const struct pci_bus *bus, int n);
void pci_bus_remove_resources(struct pci_bus *bus);

1166
#define pci_bus_for_each_resource(bus, res, i)				\
1167 1168 1169
	for (i = 0;							\
	    (res = pci_bus_resource_n(bus, i)) || i < PCI_BRIDGE_RESOURCE_NUM; \
	     i++)
1170

1171 1172 1173
int __must_check pci_bus_alloc_resource(struct pci_bus *bus,
			struct resource *res, resource_size_t size,
			resource_size_t align, resource_size_t min,
1174
			unsigned long type_mask,
1175 1176
			resource_size_t (*alignf)(void *,
						  const struct resource *,
1177 1178
						  resource_size_t,
						  resource_size_t),
1179
			void *alignf_data);
L
Linus Torvalds 已提交
1180

1181 1182 1183

int pci_remap_iospace(const struct resource *res, phys_addr_t phys_addr);

Y
Yinghai Lu 已提交
1184
static inline pci_bus_addr_t pci_bus_address(struct pci_dev *pdev, int bar)
1185 1186 1187 1188 1189 1190 1191
{
	struct pci_bus_region region;

	pcibios_resource_to_bus(pdev->bus, &region, &pdev->resource[bar]);
	return region.start;
}

1192
/* Proper probing supporting hot-pluggable devices */
1193 1194
int __must_check __pci_register_driver(struct pci_driver *, struct module *,
				       const char *mod_name);
1195 1196 1197 1198 1199 1200

/*
 * pci_register_driver must be a macro so that KBUILD_MODNAME can be expanded
 */
#define pci_register_driver(driver)		\
	__pci_register_driver(driver, THIS_MODULE, KBUILD_MODNAME)
1201

1202
void pci_unregister_driver(struct pci_driver *dev);
1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215

/**
 * module_pci_driver() - Helper macro for registering a PCI driver
 * @__pci_driver: pci_driver struct
 *
 * Helper macro for PCI drivers which do not do anything special in module
 * init/exit. This eliminates a lot of boilerplate. Each module may only
 * use this macro once, and calling it replaces module_init() and module_exit()
 */
#define module_pci_driver(__pci_driver) \
	module_driver(__pci_driver, pci_register_driver, \
		       pci_unregister_driver)

1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226
/**
 * builtin_pci_driver() - Helper macro for registering a PCI driver
 * @__pci_driver: pci_driver struct
 *
 * Helper macro for PCI drivers which do not do anything special in their
 * init code. This eliminates a lot of boilerplate. Each driver may only
 * use this macro once, and calling it replaces device_initcall(...)
 */
#define builtin_pci_driver(__pci_driver) \
	builtin_driver(__pci_driver, pci_register_driver)

1227
struct pci_driver *pci_dev_driver(const struct pci_dev *dev);
1228 1229 1230 1231 1232
int pci_add_dynid(struct pci_driver *drv,
		  unsigned int vendor, unsigned int device,
		  unsigned int subvendor, unsigned int subdevice,
		  unsigned int class, unsigned int class_mask,
		  unsigned long driver_data);
1233 1234 1235 1236
const struct pci_device_id *pci_match_id(const struct pci_device_id *ids,
					 struct pci_dev *dev);
int pci_scan_bridge(struct pci_bus *bus, struct pci_dev *dev, int max,
		    int pass);
L
Linus Torvalds 已提交
1237

1238
void pci_walk_bus(struct pci_bus *top, int (*cb)(struct pci_dev *, void *),
1239
		  void *userdata);
1240
int pci_cfg_space_size(struct pci_dev *dev);
1241
unsigned char pci_bus_max_busnr(struct pci_bus *bus);
1242
void pci_setup_bridge(struct pci_bus *bus);
1243 1244
resource_size_t pcibios_window_alignment(struct pci_bus *bus,
					 unsigned long type);
1245
resource_size_t pcibios_iov_resource_alignment(struct pci_dev *dev, int resno);
1246

1247 1248 1249
#define PCI_VGA_STATE_CHANGE_BRIDGE (1 << 0)
#define PCI_VGA_STATE_CHANGE_DECODES (1 << 1)

1250
int pci_set_vga_state(struct pci_dev *pdev, bool decode,
1251
		      unsigned int command_bits, u32 flags);
1252

L
Linus Torvalds 已提交
1253 1254
/* kmem_cache style wrapper around pci_alloc_consistent() */

1255
#include <linux/pci-dma.h>
L
Linus Torvalds 已提交
1256 1257 1258 1259 1260 1261 1262
#include <linux/dmapool.h>

#define	pci_pool dma_pool
#define pci_pool_create(name, pdev, size, align, allocation) \
		dma_pool_create(name, &pdev->dev, size, align, allocation)
#define	pci_pool_destroy(pool) dma_pool_destroy(pool)
#define	pci_pool_alloc(pool, flags, handle) dma_pool_alloc(pool, flags, handle)
1263 1264
#define	pci_pool_zalloc(pool, flags, handle) \
		dma_pool_zalloc(pool, flags, handle)
L
Linus Torvalds 已提交
1265 1266 1267
#define	pci_pool_free(pool, vaddr, addr) dma_pool_free(pool, vaddr, addr)

struct msix_entry {
1268
	u32	vector;	/* kernel uses to write allocated vector */
L
Linus Torvalds 已提交
1269 1270 1271
	u16	entry;	/* driver uses to specify entry, OS writes */
};

1272 1273
#ifdef CONFIG_PCI_MSI
int pci_msi_vec_count(struct pci_dev *dev);
1274 1275
void pci_msi_shutdown(struct pci_dev *dev);
void pci_disable_msi(struct pci_dev *dev);
1276
int pci_msix_vec_count(struct pci_dev *dev);
1277 1278 1279 1280 1281
int pci_enable_msix(struct pci_dev *dev, struct msix_entry *entries, int nvec);
void pci_msix_shutdown(struct pci_dev *dev);
void pci_disable_msix(struct pci_dev *dev);
void pci_restore_msi_state(struct pci_dev *dev);
int pci_msi_enabled(void);
1282
int pci_enable_msi_range(struct pci_dev *dev, int minvec, int maxvec);
1283 1284 1285 1286 1287 1288 1289
static inline int pci_enable_msi_exact(struct pci_dev *dev, int nvec)
{
	int rc = pci_enable_msi_range(dev, nvec, nvec);
	if (rc < 0)
		return rc;
	return 0;
}
1290 1291
int pci_enable_msix_range(struct pci_dev *dev, struct msix_entry *entries,
			  int minvec, int maxvec);
1292 1293 1294 1295 1296 1297 1298 1299
static inline int pci_enable_msix_exact(struct pci_dev *dev,
					struct msix_entry *entries, int nvec)
{
	int rc = pci_enable_msix_range(dev, entries, nvec, nvec);
	if (rc < 0)
		return rc;
	return 0;
}
1300
#else
1301 1302 1303 1304
static inline int pci_msi_vec_count(struct pci_dev *dev) { return -ENOSYS; }
static inline void pci_msi_shutdown(struct pci_dev *dev) { }
static inline void pci_disable_msi(struct pci_dev *dev) { }
static inline int pci_msix_vec_count(struct pci_dev *dev) { return -ENOSYS; }
1305 1306
static inline int pci_enable_msix(struct pci_dev *dev,
				  struct msix_entry *entries, int nvec)
1307 1308 1309 1310 1311
{ return -ENOSYS; }
static inline void pci_msix_shutdown(struct pci_dev *dev) { }
static inline void pci_disable_msix(struct pci_dev *dev) { }
static inline void pci_restore_msi_state(struct pci_dev *dev) { }
static inline int pci_msi_enabled(void) { return 0; }
1312 1313
static inline int pci_enable_msi_range(struct pci_dev *dev, int minvec,
				       int maxvec)
1314
{ return -ENOSYS; }
1315 1316
static inline int pci_enable_msi_exact(struct pci_dev *dev, int nvec)
{ return -ENOSYS; }
1317 1318
static inline int pci_enable_msix_range(struct pci_dev *dev,
		      struct msix_entry *entries, int minvec, int maxvec)
1319
{ return -ENOSYS; }
1320 1321 1322
static inline int pci_enable_msix_exact(struct pci_dev *dev,
		      struct msix_entry *entries, int nvec)
{ return -ENOSYS; }
L
Linus Torvalds 已提交
1323 1324
#endif

1325
#ifdef CONFIG_PCIEPORTBUS
1326 1327
extern bool pcie_ports_disabled;
extern bool pcie_ports_auto;
1328 1329 1330 1331
#else
#define pcie_ports_disabled	true
#define pcie_ports_auto		false
#endif
1332

1333
#ifdef CONFIG_PCIEASPM
1334
bool pcie_aspm_support_enabled(void);
1335 1336
#else
static inline bool pcie_aspm_support_enabled(void) { return false; }
1337 1338
#endif

1339 1340 1341 1342 1343 1344 1345 1346
#ifdef CONFIG_PCIEAER
void pci_no_aer(void);
bool pci_aer_available(void);
#else
static inline void pci_no_aer(void) { }
static inline bool pci_aer_available(void) { return false; }
#endif

1347
#ifdef CONFIG_PCIE_ECRC
1348 1349
void pcie_set_ecrc_checking(struct pci_dev *dev);
void pcie_ecrc_get_policy(char *str);
1350
#else
1351 1352
static inline void pcie_set_ecrc_checking(struct pci_dev *dev) { }
static inline void pcie_ecrc_get_policy(char *str) { }
1353 1354
#endif

1355
#define pci_enable_msi(pdev)	pci_enable_msi_exact(pdev, 1)
1356

1357 1358 1359 1360 1361 1362
#ifdef CONFIG_HT_IRQ
/* The functions a driver should call */
int  ht_create_irq(struct pci_dev *dev, int idx);
void ht_destroy_irq(unsigned int irq);
#endif /* CONFIG_HT_IRQ */

1363 1364 1365
#ifdef CONFIG_PCI_ATS
/* Address Translation Service */
void pci_ats_init(struct pci_dev *dev);
1366 1367 1368
int pci_enable_ats(struct pci_dev *dev, int ps);
void pci_disable_ats(struct pci_dev *dev);
int pci_ats_queue_depth(struct pci_dev *dev);
1369
#else
1370 1371 1372 1373
static inline void pci_ats_init(struct pci_dev *d) { }
static inline int pci_enable_ats(struct pci_dev *d, int ps) { return -ENODEV; }
static inline void pci_disable_ats(struct pci_dev *d) { }
static inline int pci_ats_queue_depth(struct pci_dev *d) { return -ENODEV; }
1374 1375
#endif

1376 1377 1378
void pci_cfg_access_lock(struct pci_dev *dev);
bool pci_cfg_access_trylock(struct pci_dev *dev);
void pci_cfg_access_unlock(struct pci_dev *dev);
1379

1380 1381
/*
 * PCI domain support.  Sometimes called PCI segment (eg by ACPI),
1382
 * a PCI domain is defined to be a set of PCI buses which share
1383 1384
 * configuration space.
 */
1385 1386
#ifdef CONFIG_PCI_DOMAINS
extern int pci_domains_supported;
1387
int pci_get_new_domain_nr(void);
1388 1389
#else
enum { pci_domains_supported = 0 };
1390 1391
static inline int pci_domain_nr(struct pci_bus *bus) { return 0; }
static inline int pci_proc_domain(struct pci_bus *bus) { return 0; }
1392
static inline int pci_get_new_domain_nr(void) { return -ENOSYS; }
1393
#endif /* CONFIG_PCI_DOMAINS */
L
Linus Torvalds 已提交
1394

1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409 1410 1411 1412
/*
 * Generic implementation for PCI domain support. If your
 * architecture does not need custom management of PCI
 * domains then this implementation will be used
 */
#ifdef CONFIG_PCI_DOMAINS_GENERIC
static inline int pci_domain_nr(struct pci_bus *bus)
{
	return bus->domain_nr;
}
void pci_bus_assign_domain_nr(struct pci_bus *bus, struct device *parent);
#else
static inline void pci_bus_assign_domain_nr(struct pci_bus *bus,
					struct device *parent)
{
}
#endif

1413 1414
/* some architectures require additional setup to direct VGA traffic */
typedef int (*arch_set_vga_state_t)(struct pci_dev *pdev, bool decode,
1415
		      unsigned int command_bits, u32 flags);
1416
void pci_register_set_vga_state(arch_set_vga_state_t func);
1417

1418
#else /* CONFIG_PCI is not enabled */
L
Linus Torvalds 已提交
1419

1420 1421 1422 1423 1424
static inline void pci_set_flags(int flags) { }
static inline void pci_add_flags(int flags) { }
static inline void pci_clear_flags(int flags) { }
static inline int pci_has_flag(int flag) { return 0; }

L
Linus Torvalds 已提交
1425 1426 1427 1428 1429
/*
 *  If the system does not have PCI, clearly these return errors.  Define
 *  these as simple inline functions to avoid hair in drivers.
 */

1430 1431 1432
#define _PCI_NOP(o, s, t) \
	static inline int pci_##o##_config_##s(struct pci_dev *dev, \
						int where, t val) \
L
Linus Torvalds 已提交
1433
		{ return PCIBIOS_FUNC_NOT_SUPPORTED; }
1434 1435 1436 1437

#define _PCI_NOP_ALL(o, x)	_PCI_NOP(o, byte, u8 x) \
				_PCI_NOP(o, word, u16 x) \
				_PCI_NOP(o, dword, u32 x)
L
Linus Torvalds 已提交
1438 1439 1440
_PCI_NOP_ALL(read, *)
_PCI_NOP_ALL(write,)

1441
static inline struct pci_dev *pci_get_device(unsigned int vendor,
1442 1443
					     unsigned int device,
					     struct pci_dev *from)
1444
{ return NULL; }
1445

1446 1447 1448 1449
static inline struct pci_dev *pci_get_subsys(unsigned int vendor,
					     unsigned int device,
					     unsigned int ss_vendor,
					     unsigned int ss_device,
1450
					     struct pci_dev *from)
1451
{ return NULL; }
L
Linus Torvalds 已提交
1452

1453 1454
static inline struct pci_dev *pci_get_class(unsigned int class,
					    struct pci_dev *from)
1455
{ return NULL; }
L
Linus Torvalds 已提交
1456 1457

#define pci_dev_present(ids)	(0)
1458
#define no_pci_devices()	(1)
L
Linus Torvalds 已提交
1459 1460
#define pci_dev_put(dev)	do { } while (0)

1461 1462 1463
static inline void pci_set_master(struct pci_dev *dev) { }
static inline int pci_enable_device(struct pci_dev *dev) { return -EIO; }
static inline void pci_disable_device(struct pci_dev *dev) { }
1464
static inline int pci_assign_resource(struct pci_dev *dev, int i)
1465
{ return -EBUSY; }
1466 1467
static inline int __pci_register_driver(struct pci_driver *drv,
					struct module *owner)
1468
{ return 0; }
1469
static inline int pci_register_driver(struct pci_driver *drv)
1470 1471
{ return 0; }
static inline void pci_unregister_driver(struct pci_driver *drv) { }
1472
static inline int pci_find_capability(struct pci_dev *dev, int cap)
1473
{ return 0; }
1474 1475
static inline int pci_find_next_capability(struct pci_dev *dev, u8 post,
					   int cap)
1476
{ return 0; }
1477
static inline int pci_find_ext_capability(struct pci_dev *dev, int cap)
1478
{ return 0; }
1479

L
Linus Torvalds 已提交
1480
/* Power management related routines */
1481 1482
static inline int pci_save_state(struct pci_dev *dev) { return 0; }
static inline void pci_restore_state(struct pci_dev *dev) { }
1483
static inline int pci_set_power_state(struct pci_dev *dev, pci_power_t state)
1484
{ return 0; }
1485
static inline int pci_wake_from_d3(struct pci_dev *dev, bool enable)
1486
{ return 0; }
1487 1488
static inline pci_power_t pci_choose_state(struct pci_dev *dev,
					   pm_message_t state)
1489
{ return PCI_D0; }
1490 1491
static inline int pci_enable_wake(struct pci_dev *dev, pci_power_t state,
				  int enable)
1492
{ return 0; }
1493

1494
static inline int pci_request_regions(struct pci_dev *dev, const char *res_name)
1495 1496
{ return -EIO; }
static inline void pci_release_regions(struct pci_dev *dev) { }
1497

1498
static inline void pci_block_cfg_access(struct pci_dev *dev) { }
1499 1500
static inline int pci_block_cfg_access_in_atomic(struct pci_dev *dev)
{ return 0; }
1501
static inline void pci_unblock_cfg_access(struct pci_dev *dev) { }
1502

1503 1504 1505 1506 1507 1508 1509 1510 1511
static inline struct pci_bus *pci_find_next_bus(const struct pci_bus *from)
{ return NULL; }
static inline struct pci_dev *pci_get_slot(struct pci_bus *bus,
						unsigned int devfn)
{ return NULL; }
static inline struct pci_dev *pci_get_bus_and_slot(unsigned int bus,
						unsigned int devfn)
{ return NULL; }

1512 1513
static inline int pci_domain_nr(struct pci_bus *bus) { return 0; }
static inline struct pci_dev *pci_dev_get(struct pci_dev *dev) { return NULL; }
1514
static inline int pci_get_new_domain_nr(void) { return -ENOSYS; }
1515

1516 1517 1518
#define dev_is_pci(d) (false)
#define dev_is_pf(d) (false)
#define dev_num_vf(d) (0)
1519
#endif /* CONFIG_PCI */
L
Linus Torvalds 已提交
1520

1521 1522 1523
/* Include architecture-dependent settings and functions */

#include <asm/pci.h>
L
Linus Torvalds 已提交
1524

1525 1526 1527 1528
#ifndef pci_root_bus_fwnode
#define pci_root_bus_fwnode(bus)	NULL
#endif

L
Linus Torvalds 已提交
1529 1530
/* these helpers provide future and backwards compatibility
 * for accessing popular PCI BAR info */
1531 1532 1533
#define pci_resource_start(dev, bar)	((dev)->resource[(bar)].start)
#define pci_resource_end(dev, bar)	((dev)->resource[(bar)].end)
#define pci_resource_flags(dev, bar)	((dev)->resource[(bar)].flags)
L
Linus Torvalds 已提交
1534
#define pci_resource_len(dev,bar) \
1535 1536 1537 1538 1539 1540
	((pci_resource_start((dev), (bar)) == 0 &&	\
	  pci_resource_end((dev), (bar)) ==		\
	  pci_resource_start((dev), (bar))) ? 0 :	\
							\
	 (pci_resource_end((dev), (bar)) -		\
	  pci_resource_start((dev), (bar)) + 1))
L
Linus Torvalds 已提交
1541 1542 1543 1544 1545

/* Similar to the helpers above, these manipulate per-pci_dev
 * driver-specific data.  They are really just a wrapper around
 * the generic device structure functions of these calls.
 */
1546
static inline void *pci_get_drvdata(struct pci_dev *pdev)
L
Linus Torvalds 已提交
1547 1548 1549 1550
{
	return dev_get_drvdata(&pdev->dev);
}

1551
static inline void pci_set_drvdata(struct pci_dev *pdev, void *data)
L
Linus Torvalds 已提交
1552 1553 1554 1555 1556 1557 1558
{
	dev_set_drvdata(&pdev->dev, data);
}

/* If you want to know what to call your pci_dev, ask this function.
 * Again, it's a wrapper around the generic device.
 */
1559
static inline const char *pci_name(const struct pci_dev *pdev)
L
Linus Torvalds 已提交
1560
{
G
Greg KH 已提交
1561
	return dev_name(&pdev->dev);
L
Linus Torvalds 已提交
1562 1563
}

1564 1565 1566 1567 1568 1569

/* Some archs don't want to expose struct resource to userland as-is
 * in sysfs and /proc
 */
#ifndef HAVE_ARCH_PCI_RESOURCE_TO_USER
static inline void pci_resource_to_user(const struct pci_dev *dev, int bar,
1570
		const struct resource *rsrc, resource_size_t *start,
1571
		resource_size_t *end)
1572 1573 1574 1575 1576 1577 1578
{
	*start = rsrc->start;
	*end = rsrc->end;
}
#endif /* HAVE_ARCH_PCI_RESOURCE_TO_USER */


L
Linus Torvalds 已提交
1579 1580 1581 1582 1583 1584 1585 1586
/*
 *  The world is not perfect and supplies us with broken PCI devices.
 *  For at least a part of these bugs we need a work-around, so both
 *  generic (drivers/pci/quirks.c) and per-architecture code can define
 *  fixup hooks to be called for particular buggy devices.
 */

struct pci_fixup {
1587 1588 1589 1590
	u16 vendor;		/* You can use PCI_ANY_ID here of course */
	u16 device;		/* You can use PCI_ANY_ID here of course */
	u32 class;		/* You can use PCI_ANY_ID here too */
	unsigned int class_shift;	/* should be 0, 8, 16 */
L
Linus Torvalds 已提交
1591 1592 1593 1594 1595 1596 1597 1598
	void (*hook)(struct pci_dev *dev);
};

enum pci_fixup_pass {
	pci_fixup_early,	/* Before probing BARs */
	pci_fixup_header,	/* After reading configuration header */
	pci_fixup_final,	/* Final phase of device fixups */
	pci_fixup_enable,	/* pci_enable_device() time */
1599
	pci_fixup_resume,	/* pci_device_resume() */
1600
	pci_fixup_suspend,	/* pci_device_suspend() */
1601
	pci_fixup_resume_early, /* pci_device_resume_early() */
1602
	pci_fixup_suspend_late,	/* pci_device_suspend_late() */
L
Linus Torvalds 已提交
1603 1604 1605
};

/* Anonymous variables would be nice... */
1606 1607
#define DECLARE_PCI_FIXUP_SECTION(section, name, vendor, device, class,	\
				  class_shift, hook)			\
1608
	static const struct pci_fixup __PASTE(__pci_fixup_##name,__LINE__) __used	\
1609 1610 1611 1612 1613 1614
	__attribute__((__section__(#section), aligned((sizeof(void *)))))    \
		= { vendor, device, class, class_shift, hook };

#define DECLARE_PCI_FIXUP_CLASS_EARLY(vendor, device, class,		\
					 class_shift, hook)		\
	DECLARE_PCI_FIXUP_SECTION(.pci_fixup_early,			\
1615
		hook, vendor, device, class, class_shift, hook)
1616 1617 1618
#define DECLARE_PCI_FIXUP_CLASS_HEADER(vendor, device, class,		\
					 class_shift, hook)		\
	DECLARE_PCI_FIXUP_SECTION(.pci_fixup_header,			\
1619
		hook, vendor, device, class, class_shift, hook)
1620 1621 1622
#define DECLARE_PCI_FIXUP_CLASS_FINAL(vendor, device, class,		\
					 class_shift, hook)		\
	DECLARE_PCI_FIXUP_SECTION(.pci_fixup_final,			\
1623
		hook, vendor, device, class, class_shift, hook)
1624 1625 1626
#define DECLARE_PCI_FIXUP_CLASS_ENABLE(vendor, device, class,		\
					 class_shift, hook)		\
	DECLARE_PCI_FIXUP_SECTION(.pci_fixup_enable,			\
1627
		hook, vendor, device, class, class_shift, hook)
1628 1629 1630
#define DECLARE_PCI_FIXUP_CLASS_RESUME(vendor, device, class,		\
					 class_shift, hook)		\
	DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume,			\
1631
		resume##hook, vendor, device, class,	\
1632 1633 1634 1635
		class_shift, hook)
#define DECLARE_PCI_FIXUP_CLASS_RESUME_EARLY(vendor, device, class,	\
					 class_shift, hook)		\
	DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume_early,		\
1636
		resume_early##hook, vendor, device,	\
1637 1638 1639 1640
		class, class_shift, hook)
#define DECLARE_PCI_FIXUP_CLASS_SUSPEND(vendor, device, class,		\
					 class_shift, hook)		\
	DECLARE_PCI_FIXUP_SECTION(.pci_fixup_suspend,			\
1641
		suspend##hook, vendor, device, class,	\
1642
		class_shift, hook)
1643 1644 1645 1646 1647
#define DECLARE_PCI_FIXUP_CLASS_SUSPEND_LATE(vendor, device, class,	\
					 class_shift, hook)		\
	DECLARE_PCI_FIXUP_SECTION(.pci_fixup_suspend_late,		\
		suspend_late##hook, vendor, device,	\
		class, class_shift, hook)
1648

L
Linus Torvalds 已提交
1649 1650
#define DECLARE_PCI_FIXUP_EARLY(vendor, device, hook)			\
	DECLARE_PCI_FIXUP_SECTION(.pci_fixup_early,			\
1651
		hook, vendor, device, PCI_ANY_ID, 0, hook)
L
Linus Torvalds 已提交
1652 1653
#define DECLARE_PCI_FIXUP_HEADER(vendor, device, hook)			\
	DECLARE_PCI_FIXUP_SECTION(.pci_fixup_header,			\
1654
		hook, vendor, device, PCI_ANY_ID, 0, hook)
L
Linus Torvalds 已提交
1655 1656
#define DECLARE_PCI_FIXUP_FINAL(vendor, device, hook)			\
	DECLARE_PCI_FIXUP_SECTION(.pci_fixup_final,			\
1657
		hook, vendor, device, PCI_ANY_ID, 0, hook)
L
Linus Torvalds 已提交
1658 1659
#define DECLARE_PCI_FIXUP_ENABLE(vendor, device, hook)			\
	DECLARE_PCI_FIXUP_SECTION(.pci_fixup_enable,			\
1660
		hook, vendor, device, PCI_ANY_ID, 0, hook)
1661 1662
#define DECLARE_PCI_FIXUP_RESUME(vendor, device, hook)			\
	DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume,			\
1663
		resume##hook, vendor, device,		\
1664
		PCI_ANY_ID, 0, hook)
1665 1666
#define DECLARE_PCI_FIXUP_RESUME_EARLY(vendor, device, hook)		\
	DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume_early,		\
1667
		resume_early##hook, vendor, device,	\
1668
		PCI_ANY_ID, 0, hook)
1669 1670
#define DECLARE_PCI_FIXUP_SUSPEND(vendor, device, hook)			\
	DECLARE_PCI_FIXUP_SECTION(.pci_fixup_suspend,			\
1671
		suspend##hook, vendor, device,		\
1672
		PCI_ANY_ID, 0, hook)
1673 1674 1675 1676
#define DECLARE_PCI_FIXUP_SUSPEND_LATE(vendor, device, hook)		\
	DECLARE_PCI_FIXUP_SECTION(.pci_fixup_suspend_late,		\
		suspend_late##hook, vendor, device,	\
		PCI_ANY_ID, 0, hook)
L
Linus Torvalds 已提交
1677

1678
#ifdef CONFIG_PCI_QUIRKS
L
Linus Torvalds 已提交
1679
void pci_fixup_device(enum pci_fixup_pass pass, struct pci_dev *dev);
1680
int pci_dev_specific_acs_enabled(struct pci_dev *dev, u16 acs_flags);
1681
void pci_dev_specific_enable_acs(struct pci_dev *dev);
1682 1683
#else
static inline void pci_fixup_device(enum pci_fixup_pass pass,
1684
				    struct pci_dev *dev) { }
1685 1686 1687 1688 1689
static inline int pci_dev_specific_acs_enabled(struct pci_dev *dev,
					       u16 acs_flags)
{
	return -ENOTTY;
}
1690
static inline void pci_dev_specific_enable_acs(struct pci_dev *dev) { }
1691
#endif
L
Linus Torvalds 已提交
1692

1693
void __iomem *pcim_iomap(struct pci_dev *pdev, int bar, unsigned long maxlen);
1694
void pcim_iounmap(struct pci_dev *pdev, void __iomem *addr);
1695
void __iomem * const *pcim_iomap_table(struct pci_dev *pdev);
1696 1697
int pcim_iomap_regions(struct pci_dev *pdev, int mask, const char *name);
int pcim_iomap_regions_request_all(struct pci_dev *pdev, int mask,
1698
				   const char *name);
1699
void pcim_iounmap_regions(struct pci_dev *pdev, int mask);
1700

L
Linus Torvalds 已提交
1701
extern int pci_pci_problems;
A
Alan Cox 已提交
1702
#define PCIPCI_FAIL		1	/* No PCI PCI DMA */
L
Linus Torvalds 已提交
1703 1704 1705 1706
#define PCIPCI_TRITON		2
#define PCIPCI_NATOMA		4
#define PCIPCI_VIAETBF		8
#define PCIPCI_VSFX		16
A
Alan Cox 已提交
1707 1708
#define PCIPCI_ALIMAGIK		32	/* Need low latency setting */
#define PCIAGP_FAIL		64	/* No PCI to AGP DMA */
L
Linus Torvalds 已提交
1709

1710 1711
extern unsigned long pci_cardbus_io_size;
extern unsigned long pci_cardbus_mem_size;
1712
extern u8 pci_dfl_cache_line_size;
1713
extern u8 pci_cache_line_size;
1714

1715 1716 1717
extern unsigned long pci_hotplug_io_size;
extern unsigned long pci_hotplug_mem_size;

1718
/* Architecture-specific versions may override these (weak) */
1719
void pcibios_disable_device(struct pci_dev *dev);
1720
void pcibios_set_master(struct pci_dev *dev);
1721 1722
int pcibios_set_pcie_reset_state(struct pci_dev *dev,
				 enum pcie_reset_state state);
1723
int pcibios_add_device(struct pci_dev *dev);
1724
void pcibios_release_device(struct pci_dev *dev);
1725
void pcibios_penalize_isa_irq(int irq, int active);
1726 1727
int pcibios_alloc_irq(struct pci_dev *dev);
void pcibios_free_irq(struct pci_dev *dev);
1728

1729 1730 1731 1732
#ifdef CONFIG_HIBERNATE_CALLBACKS
extern struct dev_pm_ops pcibios_pm_ops;
#endif

1733
#ifdef CONFIG_PCI_MMCONFIG
1734 1735
void __init pci_mmcfg_early_init(void);
void __init pci_mmcfg_late_init(void);
1736
#else
1737
static inline void pci_mmcfg_early_init(void) { }
1738 1739 1740
static inline void pci_mmcfg_late_init(void) { }
#endif

1741
int pci_ext_cfg_avail(void);
1742

1743
void __iomem *pci_ioremap_bar(struct pci_dev *pdev, int bar);
1744
void __iomem *pci_ioremap_wc_bar(struct pci_dev *pdev, int bar);
1745

1746
#ifdef CONFIG_PCI_IOV
1747 1748 1749
int pci_iov_virtfn_bus(struct pci_dev *dev, int id);
int pci_iov_virtfn_devfn(struct pci_dev *dev, int id);

1750 1751 1752
int pci_enable_sriov(struct pci_dev *dev, int nr_virtfn);
void pci_disable_sriov(struct pci_dev *dev);
int pci_num_vf(struct pci_dev *dev);
1753
int pci_vfs_assigned(struct pci_dev *dev);
1754 1755
int pci_sriov_set_totalvfs(struct pci_dev *dev, u16 numvfs);
int pci_sriov_get_totalvfs(struct pci_dev *dev);
1756
resource_size_t pci_iov_resource_size(struct pci_dev *dev, int resno);
1757
#else
1758 1759 1760 1761 1762 1763 1764 1765
static inline int pci_iov_virtfn_bus(struct pci_dev *dev, int id)
{
	return -ENOSYS;
}
static inline int pci_iov_virtfn_devfn(struct pci_dev *dev, int id)
{
	return -ENOSYS;
}
1766
static inline int pci_enable_sriov(struct pci_dev *dev, int nr_virtfn)
1767 1768 1769
{ return -ENODEV; }
static inline void pci_disable_sriov(struct pci_dev *dev) { }
static inline int pci_num_vf(struct pci_dev *dev) { return 0; }
1770
static inline int pci_vfs_assigned(struct pci_dev *dev)
1771
{ return 0; }
1772
static inline int pci_sriov_set_totalvfs(struct pci_dev *dev, u16 numvfs)
1773
{ return 0; }
1774
static inline int pci_sriov_get_totalvfs(struct pci_dev *dev)
1775
{ return 0; }
1776 1777
static inline resource_size_t pci_iov_resource_size(struct pci_dev *dev, int resno)
{ return 0; }
1778 1779
#endif

1780
#if defined(CONFIG_HOTPLUG_PCI) || defined(CONFIG_HOTPLUG_PCI_MODULE)
1781 1782
void pci_hp_create_module_link(struct pci_slot *pci_slot);
void pci_hp_remove_module_link(struct pci_slot *pci_slot);
1783 1784
#endif

1785 1786 1787 1788 1789 1790 1791 1792 1793 1794 1795 1796 1797 1798 1799 1800
/**
 * pci_pcie_cap - get the saved PCIe capability offset
 * @dev: PCI device
 *
 * PCIe capability offset is calculated at PCI device initialization
 * time and saved in the data structure. This function returns saved
 * PCIe capability offset. Using this instead of pci_find_capability()
 * reduces unnecessary search in the PCI configuration space. If you
 * need to calculate PCIe capability offset from raw device for some
 * reasons, please use pci_find_capability() instead.
 */
static inline int pci_pcie_cap(struct pci_dev *dev)
{
	return dev->pcie_cap;
}

1801 1802 1803 1804
/**
 * pci_is_pcie - check if the PCI device is PCI Express capable
 * @dev: PCI device
 *
1805
 * Returns: true if the PCI device is PCI Express capable, false otherwise.
1806 1807 1808
 */
static inline bool pci_is_pcie(struct pci_dev *dev)
{
1809
	return pci_pcie_cap(dev);
1810 1811
}

1812 1813 1814 1815 1816 1817 1818 1819 1820
/**
 * pcie_caps_reg - get the PCIe Capabilities Register
 * @dev: PCI device
 */
static inline u16 pcie_caps_reg(const struct pci_dev *dev)
{
	return dev->pcie_flags_reg;
}

1821 1822 1823 1824 1825 1826
/**
 * pci_pcie_type - get the PCIe device/port type
 * @dev: PCI device
 */
static inline int pci_pcie_type(const struct pci_dev *dev)
{
1827
	return (pcie_caps_reg(dev) & PCI_EXP_FLAGS_TYPE) >> 4;
1828 1829
}

C
Chris Wright 已提交
1830
void pci_request_acs(void);
1831 1832 1833
bool pci_acs_enabled(struct pci_dev *pdev, u16 acs_flags);
bool pci_acs_path_enabled(struct pci_dev *start,
			  struct pci_dev *end, u16 acs_flags);
1834

1835
#define PCI_VPD_LRDT			0x80	/* Large Resource Data Type */
1836
#define PCI_VPD_LRDT_ID(x)		((x) | PCI_VPD_LRDT)
1837 1838 1839 1840 1841 1842 1843 1844 1845 1846 1847

/* Large Resource Data Type Tag Item Names */
#define PCI_VPD_LTIN_ID_STRING		0x02	/* Identifier String */
#define PCI_VPD_LTIN_RO_DATA		0x10	/* Read-Only Data */
#define PCI_VPD_LTIN_RW_DATA		0x11	/* Read-Write Data */

#define PCI_VPD_LRDT_ID_STRING		PCI_VPD_LRDT_ID(PCI_VPD_LTIN_ID_STRING)
#define PCI_VPD_LRDT_RO_DATA		PCI_VPD_LRDT_ID(PCI_VPD_LTIN_RO_DATA)
#define PCI_VPD_LRDT_RW_DATA		PCI_VPD_LRDT_ID(PCI_VPD_LTIN_RW_DATA)

/* Small Resource Data Type Tag Item Names */
1848
#define PCI_VPD_STIN_END		0x0f	/* End */
1849

1850
#define PCI_VPD_SRDT_END		(PCI_VPD_STIN_END << 3)
1851 1852 1853

#define PCI_VPD_SRDT_TIN_MASK		0x78
#define PCI_VPD_SRDT_LEN_MASK		0x07
1854
#define PCI_VPD_LRDT_TIN_MASK		0x7f
1855 1856 1857

#define PCI_VPD_LRDT_TAG_SIZE		3
#define PCI_VPD_SRDT_TAG_SIZE		1
1858

1859 1860
#define PCI_VPD_INFO_FLD_HDR_SIZE	3

1861 1862 1863
#define PCI_VPD_RO_KEYWORD_PARTNO	"PN"
#define PCI_VPD_RO_KEYWORD_MFR_ID	"MN"
#define PCI_VPD_RO_KEYWORD_VENDOR0	"V0"
1864
#define PCI_VPD_RO_KEYWORD_CHKSUM	"RV"
1865

1866 1867 1868 1869 1870 1871 1872 1873 1874 1875 1876
/**
 * pci_vpd_lrdt_size - Extracts the Large Resource Data Type length
 * @lrdt: Pointer to the beginning of the Large Resource Data Type tag
 *
 * Returns the extracted Large Resource Data Type length.
 */
static inline u16 pci_vpd_lrdt_size(const u8 *lrdt)
{
	return (u16)lrdt[1] + ((u16)lrdt[2] << 8);
}

1877 1878 1879 1880 1881 1882 1883 1884 1885 1886 1887
/**
 * pci_vpd_lrdt_tag - Extracts the Large Resource Data Type Tag Item
 * @lrdt: Pointer to the beginning of the Large Resource Data Type tag
 *
 * Returns the extracted Large Resource Data Type Tag item.
 */
static inline u16 pci_vpd_lrdt_tag(const u8 *lrdt)
{
    return (u16)(lrdt[0] & PCI_VPD_LRDT_TIN_MASK);
}

1888 1889 1890 1891 1892 1893 1894 1895 1896 1897 1898
/**
 * pci_vpd_srdt_size - Extracts the Small Resource Data Type length
 * @lrdt: Pointer to the beginning of the Small Resource Data Type tag
 *
 * Returns the extracted Small Resource Data Type length.
 */
static inline u8 pci_vpd_srdt_size(const u8 *srdt)
{
	return (*srdt) & PCI_VPD_SRDT_LEN_MASK;
}

1899 1900 1901 1902 1903 1904 1905 1906 1907 1908 1909
/**
 * pci_vpd_srdt_tag - Extracts the Small Resource Data Type Tag Item
 * @lrdt: Pointer to the beginning of the Small Resource Data Type tag
 *
 * Returns the extracted Small Resource Data Type Tag Item.
 */
static inline u8 pci_vpd_srdt_tag(const u8 *srdt)
{
	return ((*srdt) & PCI_VPD_SRDT_TIN_MASK) >> 3;
}

1910 1911 1912 1913 1914 1915 1916 1917 1918 1919 1920
/**
 * pci_vpd_info_field_size - Extracts the information field length
 * @lrdt: Pointer to the beginning of an information field header
 *
 * Returns the extracted information field length.
 */
static inline u8 pci_vpd_info_field_size(const u8 *info_field)
{
	return info_field[2];
}

1921 1922 1923 1924 1925 1926 1927 1928 1929 1930 1931 1932
/**
 * pci_vpd_find_tag - Locates the Resource Data Type tag provided
 * @buf: Pointer to buffered vpd data
 * @off: The offset into the buffer at which to begin the search
 * @len: The length of the vpd buffer
 * @rdt: The Resource Data Type to search for
 *
 * Returns the index where the Resource Data Type was found or
 * -ENOENT otherwise.
 */
int pci_vpd_find_tag(const u8 *buf, unsigned int off, unsigned int len, u8 rdt);

1933 1934 1935 1936 1937 1938 1939 1940 1941 1942 1943 1944 1945
/**
 * pci_vpd_find_info_keyword - Locates an information field keyword in the VPD
 * @buf: Pointer to buffered vpd data
 * @off: The offset into the buffer at which to begin the search
 * @len: The length of the buffer area, relative to off, in which to search
 * @kw: The keyword to search for
 *
 * Returns the index where the information field keyword was found or
 * -ENOENT otherwise.
 */
int pci_vpd_find_info_keyword(const u8 *buf, unsigned int off,
			      unsigned int len, const char *kw);

1946 1947 1948
/* PCI <-> OF binding helpers */
#ifdef CONFIG_OF
struct device_node;
1949
struct irq_domain;
1950 1951 1952 1953
void pci_set_of_node(struct pci_dev *dev);
void pci_release_of_node(struct pci_dev *dev);
void pci_set_bus_of_node(struct pci_bus *bus);
void pci_release_bus_of_node(struct pci_bus *bus);
1954
struct irq_domain *pci_host_bridge_of_msi_domain(struct pci_bus *bus);
1955 1956

/* Arch may override this (weak) */
1957
struct device_node *pcibios_get_phb_of_node(struct pci_bus *bus);
1958

1959 1960
static inline struct device_node *
pci_device_to_OF_node(const struct pci_dev *pdev)
1961 1962 1963 1964
{
	return pdev ? pdev->dev.of_node : NULL;
}

1965 1966 1967 1968 1969
static inline struct device_node *pci_bus_to_OF_node(struct pci_bus *bus)
{
	return bus ? bus->dev.of_node : NULL;
}

1970 1971 1972 1973 1974
#else /* CONFIG_OF */
static inline void pci_set_of_node(struct pci_dev *dev) { }
static inline void pci_release_of_node(struct pci_dev *dev) { }
static inline void pci_set_bus_of_node(struct pci_bus *bus) { }
static inline void pci_release_bus_of_node(struct pci_bus *bus) { }
1975 1976
static inline struct device_node *
pci_device_to_OF_node(const struct pci_dev *pdev) { return NULL; }
1977 1978
static inline struct irq_domain *
pci_host_bridge_of_msi_domain(struct pci_bus *bus) { return NULL; }
1979 1980
#endif  /* CONFIG_OF */

1981 1982 1983 1984 1985 1986 1987 1988 1989 1990
#ifdef CONFIG_ACPI
struct irq_domain *pci_host_bridge_acpi_msi_domain(struct pci_bus *bus);

void
pci_msi_register_fwnode_provider(struct fwnode_handle *(*fn)(struct device *));
#else
static inline struct irq_domain *
pci_host_bridge_acpi_msi_domain(struct pci_bus *bus) { return NULL; }
#endif

1991 1992 1993 1994 1995 1996 1997
#ifdef CONFIG_EEH
static inline struct eeh_dev *pci_dev_to_eeh_dev(struct pci_dev *pdev)
{
	return pdev->dev.archdata.edev;
}
#endif

1998 1999 2000 2001
int pci_for_each_dma_alias(struct pci_dev *pdev,
			   int (*fn)(struct pci_dev *pdev,
				     u16 alias, void *data), void *data);

2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014
/* helper functions for operation of device flag */
static inline void pci_set_dev_assigned(struct pci_dev *pdev)
{
	pdev->dev_flags |= PCI_DEV_FLAGS_ASSIGNED;
}
static inline void pci_clear_dev_assigned(struct pci_dev *pdev)
{
	pdev->dev_flags &= ~PCI_DEV_FLAGS_ASSIGNED;
}
static inline bool pci_is_dev_assigned(struct pci_dev *pdev)
{
	return (pdev->dev_flags & PCI_DEV_FLAGS_ASSIGNED) == PCI_DEV_FLAGS_ASSIGNED;
}
2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025

/**
 * pci_ari_enabled - query ARI forwarding status
 * @bus: the PCI bus
 *
 * Returns true if ARI forwarding is enabled.
 */
static inline bool pci_ari_enabled(struct pci_bus *bus)
{
	return bus->self && bus->self->ari_enabled;
}
2026 2027 2028 2029

/* provide the legacy pci_dma_* API */
#include <linux/pci-dma-compat.h>

L
Linus Torvalds 已提交
2030
#endif /* LINUX_PCI_H */
新手
引导
客服 返回
顶部