pci.h 59.1 KB
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/*
 *	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

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#include <linux/pci_regs.h>	/* The pci register defines */
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/*
 * 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
 */
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#define PCI_DEVFN(slot, func)	((((slot) & 0x1f) << 3) | ((func) & 0x07))
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#define PCI_SLOT(devfn)		(((devfn) >> 3) & 0x1f)
#define PCI_FUNC(devfn)		((devfn) & 0x07)

/* Ioctls for /proc/bus/pci/X/Y nodes. */
#define PCIIOC_BASE		('P' << 24 | 'C' << 16 | 'I' << 8)
#define PCIIOC_CONTROLLER	(PCIIOC_BASE | 0x00)	/* Get controller for PCI device. */
#define PCIIOC_MMAP_IS_IO	(PCIIOC_BASE | 0x01)	/* Set mmap state to I/O space. */
#define PCIIOC_MMAP_IS_MEM	(PCIIOC_BASE | 0x02)	/* Set mmap state to MEM space. */
#define PCIIOC_WRITE_COMBINE	(PCIIOC_BASE | 0x03)	/* Enable/disable write-combining. */

#ifdef __KERNEL__

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#include <linux/mod_devicetable.h>

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#include <linux/types.h>
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#include <linux/init.h>
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#include <linux/ioport.h>
#include <linux/list.h>
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#include <linux/compiler.h>
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#include <linux/errno.h>
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#include <linux/kobject.h>
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#include <linux/atomic.h>
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#include <linux/device.h>
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#include <linux/io.h>
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#include <linux/irqreturn.h>
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/* Include the ID list */
#include <linux/pci_ids.h>

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/* 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;
};

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

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/* File state for mmap()s on /proc/bus/pci/X/Y */
enum pci_mmap_state {
	pci_mmap_io,
	pci_mmap_mem
};

/* This defines the direction arg to the DMA mapping routines. */
#define PCI_DMA_BIDIRECTIONAL	0
#define PCI_DMA_TODEVICE	1
#define PCI_DMA_FROMDEVICE	2
#define PCI_DMA_NONE		3

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/*
 *  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,

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	/* device specific resources */
#ifdef CONFIG_PCI_IOV
	PCI_IOV_RESOURCES,
	PCI_IOV_RESOURCE_END = PCI_IOV_RESOURCES + PCI_SRIOV_NUM_BARS - 1,
#endif

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	/* 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 */
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	DEVICE_COUNT_RESOURCE = PCI_NUM_RESOURCES,
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};
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typedef int __bitwise pci_power_t;

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#define PCI_D0		((pci_power_t __force) 0)
#define PCI_D1		((pci_power_t __force) 1)
#define PCI_D2		((pci_power_t __force) 2)
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#define PCI_D3hot	((pci_power_t __force) 3)
#define PCI_D3cold	((pci_power_t __force) 4)
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#define PCI_UNKNOWN	((pci_power_t __force) 5)
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#define PCI_POWER_ERROR	((pci_power_t __force) -1)
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/* 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];
}

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#define PCI_PM_D2_DELAY		200
#define PCI_PM_D3_WAIT		10
#define PCI_PM_D3COLD_WAIT	100
#define PCI_PM_BUS_WAIT		50
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/** 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,
};

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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,

	/* Use #PERST to reset PCI-E device */
	pcie_warm_reset = (__force pcie_reset_state_t) 2,

	/* Use PCI-E Hot Reset to reset device */
	pcie_hot_reset = (__force pcie_reset_state_t) 3
};

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typedef unsigned short __bitwise pci_dev_flags_t;
enum pci_dev_flags {
	/* INTX_DISABLE in PCI_COMMAND register disables MSI
	 * generation too.
	 */
	PCI_DEV_FLAGS_MSI_INTX_DISABLE_BUG = (__force pci_dev_flags_t) 1,
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	/* Device configuration is irrevocably lost if disabled into D3 */
	PCI_DEV_FLAGS_NO_D3 = (__force pci_dev_flags_t) 2,
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	/* Provide indication device is assigned by a Virtual Machine Manager */
	PCI_DEV_FLAGS_ASSIGNED = (__force pci_dev_flags_t) 4,
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};

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enum pci_irq_reroute_variant {
	INTEL_IRQ_REROUTE_VARIANT = 1,
	MAX_IRQ_REROUTE_VARIANTS = 3
};

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typedef unsigned short __bitwise pci_bus_flags_t;
enum pci_bus_flags {
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	PCI_BUS_FLAGS_NO_MSI   = (__force pci_bus_flags_t) 1,
	PCI_BUS_FLAGS_NO_MMRBC = (__force pci_bus_flags_t) 2,
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};

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/* 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,
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	AGP_UNKNOWN			= 0x0c,
	AGP_1X				= 0x0d,
	AGP_2X				= 0x0e,
	AGP_4X				= 0x0f,
	AGP_8X				= 0x10,
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	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,
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	PCIE_SPEED_8_0GT		= 0x16,
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	PCI_SPEED_UNKNOWN		= 0xff,
};

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struct pci_cap_saved_data {
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	char cap_nr;
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	unsigned int size;
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	u32 data[0];
};

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struct pci_cap_saved_state {
	struct hlist_node next;
	struct pci_cap_saved_data cap;
};

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struct pcie_link_state;
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struct pci_vpd;
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struct pci_sriov;
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struct pci_ats;
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/*
 * 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 */
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	struct pci_slot	*slot;		/* Physical slot this device is in */
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	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) */
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	u8		revision;	/* PCI revision, low byte of class word */
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	u8		hdr_type;	/* PCI header type (`multi' flag masked out) */
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	u8		pcie_cap;	/* PCI-E capability offset */
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	u8		pcie_type:4;	/* PCI-E device/port type */
	u8		pcie_mpss:3;	/* PCI-E Max Payload Size Supported */
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	u8		rom_base_reg;	/* which config register controls the ROM */
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	u8		pin;  		/* which interrupt pin this device uses */
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	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.  */

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	struct device_dma_parameters dma_parms;

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	pci_power_t     current_state;  /* Current operating state. In ACPI-speak,
					   this is D0-D3, D0 being fully functional,
					   and D3 being off. */
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	int		pm_cap;		/* PM capability offset in the
					   configuration space */
	unsigned int	pme_support:5;	/* Bitmask of states from which PME#
					   can be generated */
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	unsigned int	pme_interrupt:1;
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	unsigned int	pme_poll:1;	/* Poll device's PME status bit */
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	unsigned int	d1_support:1;	/* Low power state D1 is supported */
	unsigned int	d2_support:1;	/* Low power state D2 is supported */
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	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 */
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	unsigned int	mmio_always_on:1;	/* disallow turning off io/mem
						   decoding during bar sizing */
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	unsigned int	wakeup_prepared:1;
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	unsigned int	runtime_d3cold:1;	/* whether go through runtime
						   D3cold, not set for devices
						   powered on/off by the
						   corresponding bridge */
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	unsigned int	d3_delay;	/* D3->D0 transition time in ms */
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	unsigned int	d3cold_delay;	/* D3cold->D0 transition time in ms */
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#ifdef CONFIG_PCIEASPM
	struct pcie_link_state	*link_state;	/* ASPM link state. */
#endif

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	pci_channel_state_t error_state;	/* current connectivity state */
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	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 */

	/* These fields are used by common fixups */
	unsigned int	transparent:1;	/* Transparent PCI bridge */
	unsigned int	multifunction:1;/* Part of multi-function device */
	/* keep track of device state */
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	unsigned int	is_added:1;
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	unsigned int	is_busmaster:1; /* device is busmaster */
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	unsigned int	no_msi:1;	/* device may not use msi */
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	unsigned int	block_cfg_access:1;	/* config space access is blocked */
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	unsigned int	broken_parity_status:1;	/* Device generates false positive parity */
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	unsigned int	irq_reroute_variant:2;	/* device needs IRQ rerouting variant */
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	unsigned int 	msi_enabled:1;
	unsigned int	msix_enabled:1;
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	unsigned int	ari_enabled:1;	/* ARI forwarding */
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	unsigned int	is_managed:1;
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	unsigned int	is_pcie:1;	/* Obsolete. Will be removed.
					   Use pci_is_pcie() instead */
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	unsigned int    needs_freset:1; /* Dev requires fundamental reset */
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	unsigned int	state_saved:1;
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	unsigned int	is_physfn:1;
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	unsigned int	is_virtfn:1;
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	unsigned int	reset_fn:1;
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	unsigned int    is_hotplug_bridge:1;
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	unsigned int    __aer_firmware_first_valid:1;
	unsigned int	__aer_firmware_first:1;
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	unsigned int	broken_intx_masking:1;
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	unsigned int	io_window_1k:1;	/* Intel P2P bridge 1K I/O windows */
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	pci_dev_flags_t dev_flags;
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	atomic_t	enable_cnt;	/* pci_enable_device has been called */
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	u32		saved_config_space[16]; /* config space saved at suspend time */
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	struct hlist_head saved_cap_space;
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	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 */
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	struct bin_attribute *res_attr_wc[DEVICE_COUNT_RESOURCE]; /* sysfs file for WC mapping of resources */
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#ifdef CONFIG_PCI_MSI
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	struct list_head msi_list;
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	struct kset *msi_kset;
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#endif
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	struct pci_vpd *vpd;
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#ifdef CONFIG_PCI_ATS
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	union {
		struct pci_sriov *sriov;	/* SR-IOV capability related */
		struct pci_dev *physfn;	/* the PF this VF is associated with */
	};
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	struct pci_ats	*ats;	/* Address Translation Service */
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#endif
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};

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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;
}

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extern struct pci_dev *alloc_pci_dev(void);

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#define pci_dev_b(n) list_entry(n, struct pci_dev, bus_list)
#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)

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

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extern struct resource busn_resource;

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struct pci_host_bridge_window {
	struct list_head list;
	struct resource *res;		/* host bridge aperture (CPU address) */
	resource_size_t offset;		/* bus address + offset = CPU address */
};
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struct pci_host_bridge {
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	struct device dev;
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	struct pci_bus *bus;		/* root bus */
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	struct list_head windows;	/* pci_host_bridge_windows */
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	void (*release_fn)(struct pci_host_bridge *);
	void *release_data;
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};
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#define	to_pci_host_bridge(n) container_of(n, struct pci_host_bridge, dev)
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void pci_set_host_bridge_release(struct pci_host_bridge *bridge,
		     void (*release_fn)(struct pci_host_bridge *),
		     void *release_data);
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/*
 * 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;
};
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#define PCI_REGION_FLAG_MASK	0x0fU	/* These bits of resource flags tell us the PCI region flags */
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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 */
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	struct list_head slots;		/* list of slots on this bus */
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	struct resource *resource[PCI_BRIDGE_RESOURCE_NUM];
	struct list_head resources;	/* address space routed to this bus */
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	struct resource busn_res;	/* bus numbers routed to this bus */
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	struct pci_ops	*ops;		/* configuration access functions */
	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 */
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	unsigned char	max_bus_speed;	/* enum pci_bus_speed */
	unsigned char	cur_bus_speed;	/* enum pci_bus_speed */
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	char		name[48];

	unsigned short  bridge_ctl;	/* manage NO_ISA/FBB/et al behaviors */
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	pci_bus_flags_t bus_flags;	/* Inherited by child busses */
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	struct device		*bridge;
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	struct device		dev;
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	struct bin_attribute	*legacy_io; /* legacy I/O for this bus */
	struct bin_attribute	*legacy_mem; /* legacy mem */
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	unsigned int		is_added:1;
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};

#define pci_bus_b(n)	list_entry(n, struct pci_bus, node)
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#define to_pci_bus(n)	container_of(n, struct pci_bus, dev)
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/*
 * Returns true if the pci bus is root (behind host-pci bridge),
 * false otherwise
 */
static inline bool pci_is_root_bus(struct pci_bus *pbus)
{
	return !(pbus->parent);
}

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#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

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/*
 * 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

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/*
 * Translate above to generic errno for passing back through non-pci.
 */
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:
		return -EINVAL;
	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;
	}

	return -ENOTTY;
}

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/* Low-level architecture-dependent routines */

struct pci_ops {
	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);
};

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/*
 * ACPI needs to be able to access PCI config space before we've done a
 * PCI bus scan and created pci_bus structures.
 */
extern int raw_pci_read(unsigned int domain, unsigned int bus,
			unsigned int devfn, int reg, int len, u32 *val);
extern int raw_pci_write(unsigned int domain, unsigned int bus,
			unsigned int devfn, int reg, int len, u32 val);
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struct pci_bus_region {
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	resource_size_t start;
	resource_size_t end;
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};

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

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/* ---------------------------------------------------------------- */
/** PCI Error Recovery System (PCI-ERS).  If a PCI device driver provides
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 *  a set of callbacks in struct pci_error_handlers, then that device driver
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 *  will be notified of PCI bus errors, and will be driven to recovery
 *  when an error occurs.
 */

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,
};

/* PCI bus error event callbacks */
567
struct pci_error_handlers {
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	/* PCI bus error detected on this device */
	pci_ers_result_t (*error_detected)(struct pci_dev *dev,
570
					   enum pci_channel_state error);
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	/* 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);

	/* Device driver may resume normal operations */
	void (*resume)(struct pci_dev *dev);
};

/* ---------------------------------------------------------------- */

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struct module;
struct pci_driver {
	struct list_head node;
590
	const char *name;
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	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 */
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	int  (*suspend_late) (struct pci_dev *dev, pm_message_t state);
	int  (*resume_early) (struct pci_dev *dev);
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	int  (*resume) (struct pci_dev *dev);	                /* Device woken up */
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	void (*shutdown) (struct pci_dev *dev);
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	struct pci_error_handlers *err_handler;
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	struct device_driver	driver;
	struct pci_dynids dynids;
};

604
#define	to_pci_driver(drv) container_of(drv, struct pci_driver, driver)
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606
/**
607
 * DEFINE_PCI_DEVICE_TABLE - macro used to describe a pci device table
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 * @_table: device table name
 *
 * This macro is used to create a struct pci_device_id array (a device table)
 * in a generic manner.
 */
613
#define DEFINE_PCI_DEVICE_TABLE(_table) \
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	const struct pci_device_id _table[] __devinitconst

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/**
 * 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

/**
 * 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
635
 * specific PCI class.  The vendor, device, subvendor, and subdevice
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 * 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

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/**
 * PCI_VDEVICE - macro used to describe a specific pci device in short form
645 646
 * @vendor: the vendor name
 * @device: the 16 bit PCI Device ID
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 *
 * 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.
 */

#define PCI_VDEVICE(vendor, device)		\
	PCI_VENDOR_ID_##vendor, (device),	\
	PCI_ANY_ID, PCI_ANY_ID, 0, 0

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/* these external functions are only available when PCI support is enabled */
#ifdef CONFIG_PCI

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extern void pcie_bus_configure_settings(struct pci_bus *bus, u8 smpss);

enum pcie_bus_config_types {
664
	PCIE_BUS_TUNE_OFF,
665
	PCIE_BUS_SAFE,
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	PCIE_BUS_PERFORMANCE,
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	PCIE_BUS_PEER2PEER,
};

extern enum pcie_bus_config_types pcie_bus_config;

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extern struct bus_type pci_bus_type;

/* Do NOT directly access these two variables, unless you are arch specific pci
 * code, or pci core code. */
extern struct list_head pci_root_buses;	/* list of all known PCI buses */
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/* Some device drivers need know if pci is initiated */
extern int no_pci_devices(void);
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void pcibios_fixup_bus(struct pci_bus *);
681
int __must_check pcibios_enable_device(struct pci_dev *, int mask);
682
/* Architecture specific versions may override this (weak) */
683
char *pcibios_setup(char *str);
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/* Used only when drivers/pci/setup.c is used */
686
resource_size_t pcibios_align_resource(void *, const struct resource *,
687
				resource_size_t,
688
				resource_size_t);
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void pcibios_update_irq(struct pci_dev *, int irq);

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

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/* Generic PCI functions used internally */

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void pcibios_resource_to_bus(struct pci_dev *dev, struct pci_bus_region *region,
			     struct resource *res);
void pcibios_bus_to_resource(struct pci_dev *dev, struct resource *res,
			     struct pci_bus_region *region);
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void pcibios_scan_specific_bus(int busn);
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extern struct pci_bus *pci_find_bus(int domain, int busnr);
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void pci_bus_add_devices(const struct pci_bus *bus);
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struct pci_bus *pci_scan_bus_parented(struct device *parent, int bus,
				      struct pci_ops *ops, void *sysdata);
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struct pci_bus *pci_scan_bus(int bus, struct pci_ops *ops, void *sysdata);
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struct pci_bus *pci_create_root_bus(struct device *parent, int bus,
				    struct pci_ops *ops, void *sysdata,
				    struct list_head *resources);
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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);
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struct pci_bus * __devinit pci_scan_root_bus(struct device *parent, int bus,
					     struct pci_ops *ops, void *sysdata,
					     struct list_head *resources);
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struct pci_bus *pci_add_new_bus(struct pci_bus *parent, struct pci_dev *dev,
				int busnr);
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void pcie_update_link_speed(struct pci_bus *bus, u16 link_status);
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struct pci_slot *pci_create_slot(struct pci_bus *parent, int slot_nr,
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				 const char *name,
				 struct hotplug_slot *hotplug);
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void pci_destroy_slot(struct pci_slot *slot);
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void pci_renumber_slot(struct pci_slot *slot, int slot_nr);
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int pci_scan_slot(struct pci_bus *bus, int devfn);
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struct pci_dev *pci_scan_single_device(struct pci_bus *bus, int devfn);
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void pci_device_add(struct pci_dev *dev, struct pci_bus *bus);
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unsigned int pci_scan_child_bus(struct pci_bus *bus);
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int __must_check pci_bus_add_device(struct pci_dev *dev);
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void pci_read_bridge_bases(struct pci_bus *child);
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struct resource *pci_find_parent_resource(const struct pci_dev *dev,
					  struct resource *res);
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u8 pci_swizzle_interrupt_pin(const struct pci_dev *dev, u8 pin);
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int pci_get_interrupt_pin(struct pci_dev *dev, struct pci_dev **bridge);
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u8 pci_common_swizzle(struct pci_dev *dev, u8 *pinp);
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extern struct pci_dev *pci_dev_get(struct pci_dev *dev);
extern void pci_dev_put(struct pci_dev *dev);
extern void pci_remove_bus(struct pci_bus *b);
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extern void __pci_remove_bus_device(struct pci_dev *dev);
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extern void pci_stop_and_remove_bus_device(struct pci_dev *dev);
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extern void pci_stop_bus_device(struct pci_dev *dev);
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void pci_setup_cardbus(struct pci_bus *bus);
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extern void pci_sort_breadthfirst(void);
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#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))
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/* Generic PCI functions exported to card drivers */

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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);
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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);
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);
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struct pci_bus *pci_find_next_bus(const struct pci_bus *from);
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struct pci_dev *pci_get_device(unsigned int vendor, unsigned int device,
				struct pci_dev *from);
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struct pci_dev *pci_get_subsys(unsigned int vendor, unsigned int device,
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				unsigned int ss_vendor, unsigned int ss_device,
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				struct pci_dev *from);
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struct pci_dev *pci_get_slot(struct pci_bus *bus, unsigned int devfn);
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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);
}
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struct pci_dev *pci_get_class(unsigned int class, struct pci_dev *from);
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int pci_dev_present(const struct pci_device_id *ids);

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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);
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struct pci_ops *pci_bus_set_ops(struct pci_bus *bus, struct pci_ops *ops);
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static inline int pci_read_config_byte(const struct pci_dev *dev, int where, u8 *val)
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{
794
	return pci_bus_read_config_byte(dev->bus, dev->devfn, where, val);
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}
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static inline int pci_read_config_word(const struct pci_dev *dev, int where, u16 *val)
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{
798
	return pci_bus_read_config_word(dev->bus, dev->devfn, where, val);
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}
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static inline int pci_read_config_dword(const struct pci_dev *dev, int where,
801
					u32 *val)
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{
803
	return pci_bus_read_config_dword(dev->bus, dev->devfn, where, val);
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}
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static inline int pci_write_config_byte(const struct pci_dev *dev, int where, u8 val)
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{
807
	return pci_bus_write_config_byte(dev->bus, dev->devfn, where, val);
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}
809
static inline int pci_write_config_word(const struct pci_dev *dev, int where, u16 val)
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{
811
	return pci_bus_write_config_word(dev->bus, dev->devfn, where, val);
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}
813
static inline int pci_write_config_dword(const struct pci_dev *dev, int where,
814
					 u32 val)
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{
816
	return pci_bus_write_config_dword(dev->bus, dev->devfn, where, val);
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}

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/* 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);

827
int __must_check pci_enable_device(struct pci_dev *dev);
828 829
int __must_check pci_enable_device_io(struct pci_dev *dev);
int __must_check pci_enable_device_mem(struct pci_dev *dev);
830
int __must_check pci_reenable_device(struct pci_dev *);
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int __must_check pcim_enable_device(struct pci_dev *pdev);
void pcim_pin_device(struct pci_dev *pdev);

834 835 836 837 838
static inline int pci_is_enabled(struct pci_dev *pdev)
{
	return (atomic_read(&pdev->enable_cnt) > 0);
}

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static inline int pci_is_managed(struct pci_dev *pdev)
{
	return pdev->is_managed;
}

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void pci_disable_device(struct pci_dev *dev);
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extern unsigned int pcibios_max_latency;
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void pci_set_master(struct pci_dev *dev);
848
void pci_clear_master(struct pci_dev *dev);
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int pci_set_pcie_reset_state(struct pci_dev *dev, enum pcie_reset_state state);
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int pci_set_cacheline_size(struct pci_dev *dev);
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#define HAVE_PCI_SET_MWI
853
int __must_check pci_set_mwi(struct pci_dev *dev);
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int pci_try_set_mwi(struct pci_dev *dev);
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void pci_clear_mwi(struct pci_dev *dev);
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void pci_intx(struct pci_dev *dev, int enable);
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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);
860
void pci_msi_off(struct pci_dev *dev);
861
int pci_set_dma_max_seg_size(struct pci_dev *dev, unsigned int size);
862
int pci_set_dma_seg_boundary(struct pci_dev *dev, unsigned long mask);
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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);
866
int pcie_get_readrq(struct pci_dev *dev);
867
int pcie_set_readrq(struct pci_dev *dev, int rq);
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int pcie_get_mps(struct pci_dev *dev);
int pcie_set_mps(struct pci_dev *dev, int mps);
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int __pci_reset_function(struct pci_dev *dev);
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int __pci_reset_function_locked(struct pci_dev *dev);
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int pci_reset_function(struct pci_dev *dev);
873
void pci_update_resource(struct pci_dev *dev, int resno);
874
int __must_check pci_assign_resource(struct pci_dev *dev, int i);
875
int __must_check pci_reassign_resource(struct pci_dev *dev, int i, resource_size_t add_size, resource_size_t align);
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int pci_select_bars(struct pci_dev *dev, unsigned long flags);
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/* ROM control related routines */
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int pci_enable_rom(struct pci_dev *pdev);
void pci_disable_rom(struct pci_dev *pdev);
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void __iomem __must_check *pci_map_rom(struct pci_dev *pdev, size_t *size);
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void pci_unmap_rom(struct pci_dev *pdev, void __iomem *rom);
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size_t pci_get_rom_size(struct pci_dev *pdev, void __iomem *rom, size_t size);
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/* Power management related routines */
int pci_save_state(struct pci_dev *dev);
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void pci_restore_state(struct pci_dev *dev);
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struct pci_saved_state *pci_store_saved_state(struct pci_dev *dev);
int pci_load_saved_state(struct pci_dev *dev, struct pci_saved_state *state);
int pci_load_and_free_saved_state(struct pci_dev *dev,
				  struct pci_saved_state **state);
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int __pci_complete_power_transition(struct pci_dev *dev, pci_power_t state);
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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);
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bool pci_pme_capable(struct pci_dev *dev, pci_power_t state);
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void pci_pme_active(struct pci_dev *dev, bool enable);
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int __pci_enable_wake(struct pci_dev *dev, pci_power_t state,
		      bool runtime, bool enable);
899
int pci_wake_from_d3(struct pci_dev *dev, bool enable);
900
pci_power_t pci_target_state(struct pci_dev *dev);
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int pci_prepare_to_sleep(struct pci_dev *dev);
int pci_back_from_sleep(struct pci_dev *dev);
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bool pci_dev_run_wake(struct pci_dev *dev);
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bool pci_check_pme_status(struct pci_dev *dev);
void pci_pme_wakeup_bus(struct pci_bus *bus);
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static inline int pci_enable_wake(struct pci_dev *dev, pci_power_t state,
				  bool enable)
{
	return __pci_enable_wake(dev, state, false, enable);
}
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#define PCI_EXP_IDO_REQUEST	(1<<0)
#define PCI_EXP_IDO_COMPLETION	(1<<1)
void pci_enable_ido(struct pci_dev *dev, unsigned long type);
void pci_disable_ido(struct pci_dev *dev, unsigned long type);

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enum pci_obff_signal_type {
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	PCI_EXP_OBFF_SIGNAL_L0 = 0,
	PCI_EXP_OBFF_SIGNAL_ALWAYS = 1,
921 922 923 924
};
int pci_enable_obff(struct pci_dev *dev, enum pci_obff_signal_type);
void pci_disable_obff(struct pci_dev *dev);

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int pci_enable_ltr(struct pci_dev *dev);
void pci_disable_ltr(struct pci_dev *dev);
int pci_set_ltr(struct pci_dev *dev, int snoop_lat_ns, int nosnoop_lat_ns);

929 930 931 932
/* 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);

933
/* Functions for PCI Hotplug drivers to use */
934
int pci_bus_find_capability(struct pci_bus *bus, unsigned int devfn, int cap);
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#ifdef CONFIG_HOTPLUG
936
unsigned int pci_rescan_bus_bridge_resize(struct pci_dev *bridge);
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unsigned int pci_rescan_bus(struct pci_bus *bus);
#endif
939

940 941 942
/* 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);
943
int pci_vpd_truncate(struct pci_dev *dev, size_t size);
944

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/* Helper functions for low-level code (drivers/pci/setup-[bus,res].c) */
946
resource_size_t pcibios_retrieve_fw_addr(struct pci_dev *dev, int idx);
947
void pci_bus_assign_resources(const struct pci_bus *bus);
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void pci_bus_size_bridges(struct pci_bus *bus);
int pci_claim_resource(struct pci_dev *, int);
void pci_assign_unassigned_resources(void);
951
void pci_assign_unassigned_bridge_resources(struct pci_dev *bridge);
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void pdev_enable_device(struct pci_dev *);
953
int pci_enable_resources(struct pci_dev *, int mask);
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void pci_fixup_irqs(u8 (*)(struct pci_dev *, u8 *),
955
		    int (*)(const struct pci_dev *, u8, u8));
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#define HAVE_PCI_REQ_REGIONS	2
957
int __must_check pci_request_regions(struct pci_dev *, const char *);
958
int __must_check pci_request_regions_exclusive(struct pci_dev *, const char *);
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void pci_release_regions(struct pci_dev *);
960
int __must_check pci_request_region(struct pci_dev *, int, const char *);
961
int __must_check pci_request_region_exclusive(struct pci_dev *, int, const char *);
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void pci_release_region(struct pci_dev *, int);
963
int pci_request_selected_regions(struct pci_dev *, int, const char *);
964
int pci_request_selected_regions_exclusive(struct pci_dev *, int, const char *);
965
void pci_release_selected_regions(struct pci_dev *, int);
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/* drivers/pci/bus.c */
968
void pci_add_resource(struct list_head *resources, struct resource *res);
969 970
void pci_add_resource_offset(struct list_head *resources, struct resource *res,
			     resource_size_t offset);
971
void pci_free_resource_list(struct list_head *resources);
972 973 974 975
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);

976
#define pci_bus_for_each_resource(bus, res, i)				\
977 978 979
	for (i = 0;							\
	    (res = pci_bus_resource_n(bus, i)) || i < PCI_BRIDGE_RESOURCE_NUM; \
	     i++)
980

981 982 983 984
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,
			unsigned int type_mask,
985 986
			resource_size_t (*alignf)(void *,
						  const struct resource *,
987 988
						  resource_size_t,
						  resource_size_t),
989
			void *alignf_data);
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void pci_enable_bridges(struct pci_bus *bus);

992
/* Proper probing supporting hot-pluggable devices */
993 994
int __must_check __pci_register_driver(struct pci_driver *, struct module *,
				       const char *mod_name);
995 996 997 998 999 1000

/*
 * 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)
1001

1002
void pci_unregister_driver(struct pci_driver *dev);
1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015

/**
 * 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)

1016
void pci_stop_and_remove_behind_bridge(struct pci_dev *dev);
1017
struct pci_driver *pci_dev_driver(const struct pci_dev *dev);
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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);
1023 1024 1025 1026
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);
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1028
void pci_walk_bus(struct pci_bus *top, int (*cb)(struct pci_dev *, void *),
1029
		  void *userdata);
1030
int pci_cfg_space_size_ext(struct pci_dev *dev);
1031
int pci_cfg_space_size(struct pci_dev *dev);
1032
unsigned char pci_bus_max_busnr(struct pci_bus *bus);
1033
void pci_setup_bridge(struct pci_bus *bus);
1034

1035 1036 1037
#define PCI_VGA_STATE_CHANGE_BRIDGE (1 << 0)
#define PCI_VGA_STATE_CHANGE_DECODES (1 << 1)

1038
int pci_set_vga_state(struct pci_dev *pdev, bool decode,
1039
		      unsigned int command_bits, u32 flags);
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/* kmem_cache style wrapper around pci_alloc_consistent() */

1042
#include <linux/pci-dma.h>
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#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)
#define	pci_pool_free(pool, vaddr, addr) dma_pool_free(pool, vaddr, addr)

1052 1053 1054 1055 1056 1057 1058 1059 1060
enum pci_dma_burst_strategy {
	PCI_DMA_BURST_INFINITY,	/* make bursts as large as possible,
				   strategy_parameter is N/A */
	PCI_DMA_BURST_BOUNDARY, /* disconnect at every strategy_parameter
				   byte boundaries */
	PCI_DMA_BURST_MULTIPLE, /* disconnect at some multiple of
				   strategy_parameter byte boundaries */
};

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struct msix_entry {
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	u32	vector;	/* kernel uses to write allocated vector */
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	u16	entry;	/* driver uses to specify entry, OS writes */
};

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#ifndef CONFIG_PCI_MSI
1068
static inline int pci_enable_msi_block(struct pci_dev *dev, unsigned int nvec)
1069 1070 1071 1072
{
	return -1;
}

1073 1074
static inline void pci_msi_shutdown(struct pci_dev *dev)
{ }
1075 1076 1077
static inline void pci_disable_msi(struct pci_dev *dev)
{ }

1078 1079 1080 1081
static inline int pci_msix_table_size(struct pci_dev *dev)
{
	return 0;
}
1082 1083 1084 1085 1086 1087
static inline int pci_enable_msix(struct pci_dev *dev,
				  struct msix_entry *entries, int nvec)
{
	return -1;
}

1088 1089
static inline void pci_msix_shutdown(struct pci_dev *dev)
{ }
1090 1091 1092 1093 1094 1095 1096 1097
static inline void pci_disable_msix(struct pci_dev *dev)
{ }

static inline void msi_remove_pci_irq_vectors(struct pci_dev *dev)
{ }

static inline void pci_restore_msi_state(struct pci_dev *dev)
{ }
1098 1099 1100 1101
static inline int pci_msi_enabled(void)
{
	return 0;
}
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#else
1103
extern int pci_enable_msi_block(struct pci_dev *dev, unsigned int nvec);
1104
extern void pci_msi_shutdown(struct pci_dev *dev);
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extern void pci_disable_msi(struct pci_dev *dev);
1106
extern int pci_msix_table_size(struct pci_dev *dev);
1107
extern int pci_enable_msix(struct pci_dev *dev,
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	struct msix_entry *entries, int nvec);
1109
extern void pci_msix_shutdown(struct pci_dev *dev);
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extern void pci_disable_msix(struct pci_dev *dev);
extern void msi_remove_pci_irq_vectors(struct pci_dev *dev);
1112
extern void pci_restore_msi_state(struct pci_dev *dev);
1113
extern int pci_msi_enabled(void);
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#endif

1116
#ifdef CONFIG_PCIEPORTBUS
1117 1118
extern bool pcie_ports_disabled;
extern bool pcie_ports_auto;
1119 1120 1121 1122
#else
#define pcie_ports_disabled	true
#define pcie_ports_auto		false
#endif
1123

1124
#ifndef CONFIG_PCIEASPM
1125 1126
static inline int pcie_aspm_enabled(void) { return 0; }
static inline bool pcie_aspm_support_enabled(void) { return false; }
1127 1128
#else
extern int pcie_aspm_enabled(void);
1129
extern bool pcie_aspm_support_enabled(void);
1130 1131
#endif

1132 1133 1134 1135 1136 1137 1138 1139
#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

1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150
#ifndef CONFIG_PCIE_ECRC
static inline void pcie_set_ecrc_checking(struct pci_dev *dev)
{
	return;
}
static inline void pcie_ecrc_get_policy(char *str) {};
#else
extern void pcie_set_ecrc_checking(struct pci_dev *dev);
extern void pcie_ecrc_get_policy(char *str);
#endif

1151 1152
#define pci_enable_msi(pdev)	pci_enable_msi_block(pdev, 1)

1153 1154 1155 1156 1157 1158
#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 */

1159 1160 1161
extern void pci_cfg_access_lock(struct pci_dev *dev);
extern bool pci_cfg_access_trylock(struct pci_dev *dev);
extern void pci_cfg_access_unlock(struct pci_dev *dev);
1162

1163 1164 1165 1166 1167
/*
 * PCI domain support.  Sometimes called PCI segment (eg by ACPI),
 * a PCI domain is defined to be a set of PCI busses which share
 * configuration space.
 */
1168 1169 1170 1171
#ifdef CONFIG_PCI_DOMAINS
extern int pci_domains_supported;
#else
enum { pci_domains_supported = 0 };
1172 1173 1174 1175 1176
static inline int pci_domain_nr(struct pci_bus *bus)
{
	return 0;
}

1177 1178 1179 1180
static inline int pci_proc_domain(struct pci_bus *bus)
{
	return 0;
}
1181
#endif /* CONFIG_PCI_DOMAINS */
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1183 1184
/* some architectures require additional setup to direct VGA traffic */
typedef int (*arch_set_vga_state_t)(struct pci_dev *pdev, bool decode,
1185
		      unsigned int command_bits, u32 flags);
1186 1187
extern void pci_register_set_vga_state(arch_set_vga_state_t func);

1188
#else /* CONFIG_PCI is not enabled */
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/*
 *  If the system does not have PCI, clearly these return errors.  Define
 *  these as simple inline functions to avoid hair in drivers.
 */

1195 1196 1197
#define _PCI_NOP(o, s, t) \
	static inline int pci_##o##_config_##s(struct pci_dev *dev, \
						int where, t val) \
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		{ return PCIBIOS_FUNC_NOT_SUPPORTED; }
1199 1200 1201 1202

#define _PCI_NOP_ALL(o, x)	_PCI_NOP(o, byte, u8 x) \
				_PCI_NOP(o, word, u16 x) \
				_PCI_NOP(o, dword, u32 x)
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_PCI_NOP_ALL(read, *)
_PCI_NOP_ALL(write,)

1206
static inline struct pci_dev *pci_get_device(unsigned int vendor,
1207 1208 1209 1210 1211
					     unsigned int device,
					     struct pci_dev *from)
{
	return NULL;
}
1212

1213 1214 1215 1216
static inline struct pci_dev *pci_get_subsys(unsigned int vendor,
					     unsigned int device,
					     unsigned int ss_vendor,
					     unsigned int ss_device,
1217
					     struct pci_dev *from)
1218 1219 1220
{
	return NULL;
}
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1222 1223 1224 1225 1226
static inline struct pci_dev *pci_get_class(unsigned int class,
					    struct pci_dev *from)
{
	return NULL;
}
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#define pci_dev_present(ids)	(0)
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#define no_pci_devices()	(1)
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#define pci_dev_put(dev)	do { } while (0)

1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247
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)
{ }

static inline int pci_set_dma_mask(struct pci_dev *dev, u64 mask)
{
	return -EIO;
}

1248 1249 1250 1251 1252
static inline int pci_set_consistent_dma_mask(struct pci_dev *dev, u64 mask)
{
	return -EIO;
}

1253 1254 1255 1256 1257 1258
static inline int pci_set_dma_max_seg_size(struct pci_dev *dev,
					unsigned int size)
{
	return -EIO;
}

1259 1260 1261 1262 1263 1264
static inline int pci_set_dma_seg_boundary(struct pci_dev *dev,
					unsigned long mask)
{
	return -EIO;
}

1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299
static inline int pci_assign_resource(struct pci_dev *dev, int i)
{
	return -EBUSY;
}

static inline int __pci_register_driver(struct pci_driver *drv,
					struct module *owner)
{
	return 0;
}

static inline int pci_register_driver(struct pci_driver *drv)
{
	return 0;
}

static inline void pci_unregister_driver(struct pci_driver *drv)
{ }

static inline int pci_find_capability(struct pci_dev *dev, int cap)
{
	return 0;
}

static inline int pci_find_next_capability(struct pci_dev *dev, u8 post,
					   int cap)
{
	return 0;
}

static inline int pci_find_ext_capability(struct pci_dev *dev, int cap)
{
	return 0;
}

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/* Power management related routines */
1301 1302 1303 1304 1305
static inline int pci_save_state(struct pci_dev *dev)
{
	return 0;
}

1306 1307
static inline void pci_restore_state(struct pci_dev *dev)
{ }
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1309 1310 1311 1312 1313
static inline int pci_set_power_state(struct pci_dev *dev, pci_power_t state)
{
	return 0;
}

1314 1315 1316 1317 1318
static inline int pci_wake_from_d3(struct pci_dev *dev, bool enable)
{
	return 0;
}

1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330
static inline pci_power_t pci_choose_state(struct pci_dev *dev,
					   pm_message_t state)
{
	return PCI_D0;
}

static inline int pci_enable_wake(struct pci_dev *dev, pci_power_t state,
				  int enable)
{
	return 0;
}

1331 1332 1333 1334 1335 1336 1337 1338
static inline void pci_enable_ido(struct pci_dev *dev, unsigned long type)
{
}

static inline void pci_disable_ido(struct pci_dev *dev, unsigned long type)
{
}

1339 1340 1341 1342 1343 1344 1345 1346 1347
static inline int pci_enable_obff(struct pci_dev *dev, unsigned long type)
{
	return 0;
}

static inline void pci_disable_obff(struct pci_dev *dev)
{
}

1348 1349 1350 1351 1352 1353 1354
static inline int pci_request_regions(struct pci_dev *dev, const char *res_name)
{
	return -EIO;
}

static inline void pci_release_regions(struct pci_dev *dev)
{ }
1355

1356 1357
#define pci_dma_burst_advice(pdev, strat, strategy_parameter) do { } while (0)

1358
static inline void pci_block_cfg_access(struct pci_dev *dev)
1359 1360
{ }

1361 1362 1363 1364
static inline int pci_block_cfg_access_in_atomic(struct pci_dev *dev)
{ return 0; }

static inline void pci_unblock_cfg_access(struct pci_dev *dev)
1365
{ }
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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; }

1378 1379 1380
static inline int pci_domain_nr(struct pci_bus *bus)
{ return 0; }

1381 1382 1383
static inline struct pci_dev *pci_dev_get(struct pci_dev *dev)
{ return NULL; }

1384 1385 1386
#define dev_is_pci(d) (false)
#define dev_is_pf(d) (false)
#define dev_num_vf(d) (0)
1387
#endif /* CONFIG_PCI */
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1389 1390 1391
/* Include architecture-dependent settings and functions */

#include <asm/pci.h>
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1393 1394 1395 1396
#ifndef PCIBIOS_MAX_MEM_32
#define PCIBIOS_MAX_MEM_32 (-1)
#endif

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/* these helpers provide future and backwards compatibility
 * for accessing popular PCI BAR info */
1399 1400 1401
#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)
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#define pci_resource_len(dev,bar) \
1403 1404 1405 1406 1407 1408
	((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))
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/* 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.
 */
1414
static inline void *pci_get_drvdata(struct pci_dev *pdev)
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{
	return dev_get_drvdata(&pdev->dev);
}

1419
static inline void pci_set_drvdata(struct pci_dev *pdev, void *data)
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{
	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.
 */
1427
static inline const char *pci_name(const struct pci_dev *pdev)
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{
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	return dev_name(&pdev->dev);
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}

1432 1433 1434 1435 1436 1437

/* 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,
1438
		const struct resource *rsrc, resource_size_t *start,
1439
		resource_size_t *end)
1440 1441 1442 1443 1444 1445 1446
{
	*start = rsrc->start;
	*end = rsrc->end;
}
#endif /* HAVE_ARCH_PCI_RESOURCE_TO_USER */


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/*
 *  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 {
1455 1456 1457 1458
	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 */
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	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 */
1467 1468 1469
	pci_fixup_resume,	/* pci_device_resume() */
	pci_fixup_suspend,	/* pci_device_suspend */
	pci_fixup_resume_early, /* pci_device_resume_early() */
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};

/* Anonymous variables would be nice... */
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#define DECLARE_PCI_FIXUP_SECTION(section, name, vendor, device, class,	\
				  class_shift, hook)			\
	static const struct pci_fixup const __pci_fixup_##name __used	\
	__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,			\
		vendor##device##hook, vendor, device, class, class_shift, hook)
#define DECLARE_PCI_FIXUP_CLASS_HEADER(vendor, device, class,		\
					 class_shift, hook)		\
	DECLARE_PCI_FIXUP_SECTION(.pci_fixup_header,			\
		vendor##device##hook, vendor, device, class, class_shift, hook)
#define DECLARE_PCI_FIXUP_CLASS_FINAL(vendor, device, class,		\
					 class_shift, hook)		\
	DECLARE_PCI_FIXUP_SECTION(.pci_fixup_final,			\
		vendor##device##hook, vendor, device, class, class_shift, hook)
#define DECLARE_PCI_FIXUP_CLASS_ENABLE(vendor, device, class,		\
					 class_shift, hook)		\
	DECLARE_PCI_FIXUP_SECTION(.pci_fixup_enable,			\
		vendor##device##hook, vendor, device, class, class_shift, hook)
#define DECLARE_PCI_FIXUP_CLASS_RESUME(vendor, device, class,		\
					 class_shift, hook)		\
	DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume,			\
		resume##vendor##device##hook, vendor, device, class,	\
		class_shift, hook)
#define DECLARE_PCI_FIXUP_CLASS_RESUME_EARLY(vendor, device, class,	\
					 class_shift, hook)		\
	DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume_early,		\
		resume_early##vendor##device##hook, vendor, device,	\
		class, class_shift, hook)
#define DECLARE_PCI_FIXUP_CLASS_SUSPEND(vendor, device, class,		\
					 class_shift, hook)		\
	DECLARE_PCI_FIXUP_SECTION(.pci_fixup_suspend,			\
		suspend##vendor##device##hook, vendor, device, class,	\
		class_shift, hook)

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#define DECLARE_PCI_FIXUP_EARLY(vendor, device, hook)			\
	DECLARE_PCI_FIXUP_SECTION(.pci_fixup_early,			\
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		vendor##device##hook, vendor, device, PCI_ANY_ID, 0, hook)
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#define DECLARE_PCI_FIXUP_HEADER(vendor, device, hook)			\
	DECLARE_PCI_FIXUP_SECTION(.pci_fixup_header,			\
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		vendor##device##hook, vendor, device, PCI_ANY_ID, 0, hook)
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#define DECLARE_PCI_FIXUP_FINAL(vendor, device, hook)			\
	DECLARE_PCI_FIXUP_SECTION(.pci_fixup_final,			\
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		vendor##device##hook, vendor, device, PCI_ANY_ID, 0, hook)
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#define DECLARE_PCI_FIXUP_ENABLE(vendor, device, hook)			\
	DECLARE_PCI_FIXUP_SECTION(.pci_fixup_enable,			\
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		vendor##device##hook, vendor, device, PCI_ANY_ID, 0, hook)
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#define DECLARE_PCI_FIXUP_RESUME(vendor, device, hook)			\
	DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume,			\
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		resume##vendor##device##hook, vendor, device,		\
		PCI_ANY_ID, 0, hook)
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#define DECLARE_PCI_FIXUP_RESUME_EARLY(vendor, device, hook)		\
	DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume_early,		\
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		resume_early##vendor##device##hook, vendor, device,	\
		PCI_ANY_ID, 0, hook)
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#define DECLARE_PCI_FIXUP_SUSPEND(vendor, device, hook)			\
	DECLARE_PCI_FIXUP_SECTION(.pci_fixup_suspend,			\
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		suspend##vendor##device##hook, vendor, device,		\
		PCI_ANY_ID, 0, hook)
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#ifdef CONFIG_PCI_QUIRKS
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void pci_fixup_device(enum pci_fixup_pass pass, struct pci_dev *dev);
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struct pci_dev *pci_get_dma_source(struct pci_dev *dev);
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int pci_dev_specific_acs_enabled(struct pci_dev *dev, u16 acs_flags);
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#else
static inline void pci_fixup_device(enum pci_fixup_pass pass,
				    struct pci_dev *dev) {}
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static inline struct pci_dev *pci_get_dma_source(struct pci_dev *dev)
{
	return pci_dev_get(dev);
}
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static inline int pci_dev_specific_acs_enabled(struct pci_dev *dev,
					       u16 acs_flags)
{
	return -ENOTTY;
}
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#endif
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void __iomem *pcim_iomap(struct pci_dev *pdev, int bar, unsigned long maxlen);
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void pcim_iounmap(struct pci_dev *pdev, void __iomem *addr);
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void __iomem * const *pcim_iomap_table(struct pci_dev *pdev);
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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,
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				   const char *name);
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void pcim_iounmap_regions(struct pci_dev *pdev, int mask);
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extern int pci_pci_problems;
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#define PCIPCI_FAIL		1	/* No PCI PCI DMA */
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#define PCIPCI_TRITON		2
#define PCIPCI_NATOMA		4
#define PCIPCI_VIAETBF		8
#define PCIPCI_VSFX		16
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#define PCIPCI_ALIMAGIK		32	/* Need low latency setting */
#define PCIAGP_FAIL		64	/* No PCI to AGP DMA */
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extern unsigned long pci_cardbus_io_size;
extern unsigned long pci_cardbus_mem_size;
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extern u8 __devinitdata pci_dfl_cache_line_size;
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extern u8 pci_cache_line_size;
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extern unsigned long pci_hotplug_io_size;
extern unsigned long pci_hotplug_mem_size;

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/* Architecture specific versions may override these (weak) */
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int pcibios_add_platform_entries(struct pci_dev *dev);
void pcibios_disable_device(struct pci_dev *dev);
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void pcibios_set_master(struct pci_dev *dev);
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int pcibios_set_pcie_reset_state(struct pci_dev *dev,
				 enum pcie_reset_state state);
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#ifdef CONFIG_PCI_MMCONFIG
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extern void __init pci_mmcfg_early_init(void);
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extern void __init pci_mmcfg_late_init(void);
#else
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static inline void pci_mmcfg_early_init(void) { }
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static inline void pci_mmcfg_late_init(void) { }
#endif

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int pci_ext_cfg_avail(struct pci_dev *dev);

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void __iomem *pci_ioremap_bar(struct pci_dev *pdev, int bar);
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#ifdef CONFIG_PCI_IOV
extern int pci_enable_sriov(struct pci_dev *dev, int nr_virtfn);
extern void pci_disable_sriov(struct pci_dev *dev);
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extern irqreturn_t pci_sriov_migration(struct pci_dev *dev);
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extern int pci_num_vf(struct pci_dev *dev);
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#else
static inline int pci_enable_sriov(struct pci_dev *dev, int nr_virtfn)
{
	return -ENODEV;
}
static inline void pci_disable_sriov(struct pci_dev *dev)
{
}
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static inline irqreturn_t pci_sriov_migration(struct pci_dev *dev)
{
	return IRQ_NONE;
}
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static inline int pci_num_vf(struct pci_dev *dev)
{
	return 0;
}
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#endif

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#if defined(CONFIG_HOTPLUG_PCI) || defined(CONFIG_HOTPLUG_PCI_MODULE)
extern void pci_hp_create_module_link(struct pci_slot *pci_slot);
extern void pci_hp_remove_module_link(struct pci_slot *pci_slot);
#endif

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/**
 * 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;
}

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/**
 * pci_is_pcie - check if the PCI device is PCI Express capable
 * @dev: PCI device
 *
 * Retrun true if the PCI device is PCI Express capable, false otherwise.
 */
static inline bool pci_is_pcie(struct pci_dev *dev)
{
	return !!pci_pcie_cap(dev);
}

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void pci_request_acs(void);
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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);
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#define PCI_VPD_LRDT			0x80	/* Large Resource Data Type */
#define PCI_VPD_LRDT_ID(x)		(x | PCI_VPD_LRDT)

/* 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 */
#define PCI_VPD_STIN_END		0x78	/* End */

#define PCI_VPD_SRDT_END		PCI_VPD_STIN_END

#define PCI_VPD_SRDT_TIN_MASK		0x78
#define PCI_VPD_SRDT_LEN_MASK		0x07

#define PCI_VPD_LRDT_TAG_SIZE		3
#define PCI_VPD_SRDT_TAG_SIZE		1
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#define PCI_VPD_INFO_FLD_HDR_SIZE	3

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#define PCI_VPD_RO_KEYWORD_PARTNO	"PN"
#define PCI_VPD_RO_KEYWORD_MFR_ID	"MN"
#define PCI_VPD_RO_KEYWORD_VENDOR0	"V0"
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#define PCI_VPD_RO_KEYWORD_CHKSUM	"RV"
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/**
 * 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);
}

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/**
 * 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;
}

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/**
 * 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];
}

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/**
 * 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);

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/**
 * 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);

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/* PCI <-> OF binding helpers */
#ifdef CONFIG_OF
struct device_node;
extern void pci_set_of_node(struct pci_dev *dev);
extern void pci_release_of_node(struct pci_dev *dev);
extern void pci_set_bus_of_node(struct pci_bus *bus);
extern void pci_release_bus_of_node(struct pci_bus *bus);

/* Arch may override this (weak) */
extern struct device_node * __weak pcibios_get_phb_of_node(struct pci_bus *bus);

1757 1758
static inline struct device_node *
pci_device_to_OF_node(const struct pci_dev *pdev)
1759 1760 1761 1762
{
	return pdev ? pdev->dev.of_node : NULL;
}

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

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#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) { }
#endif  /* CONFIG_OF */

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#ifdef CONFIG_EEH
static inline struct eeh_dev *pci_dev_to_eeh_dev(struct pci_dev *pdev)
{
	return pdev->dev.archdata.edev;
}
#endif

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/**
 * pci_find_upstream_pcie_bridge - find upstream PCIe-to-PCI bridge of a device
 * @pdev: the PCI device
 *
 * if the device is PCIE, return NULL
 * if the device isn't connected to a PCIe bridge (that is its parent is a
 * legacy PCI bridge and the bridge is directly connected to bus 0), return its
 * parent
 */
struct pci_dev *pci_find_upstream_pcie_bridge(struct pci_dev *pdev);

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#endif /* __KERNEL__ */
#endif /* LINUX_PCI_H */