pci.h 49.0 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 <asm/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 */
	DEVICE_COUNT_RESOURCE
};
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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_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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};

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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_state {
	struct hlist_node next;
	char cap_nr;
	u32 data[0];
};

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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;	/* PCI-E device/port type */
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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	d1_support:1;	/* Low power state D1 is supported */
	unsigned int	d2_support:1;	/* Low power state D2 is supported */
	unsigned int	no_d1d2:1;	/* Only allow D0 and D3 */
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	unsigned int	wakeup_prepared:1;
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	unsigned int	d3_delay;	/* D3->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_ucfg_access:1;	/* userspace 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:1;
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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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#endif
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	struct pci_vpd *vpd;
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#ifdef CONFIG_PCI_IOV
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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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static inline struct pci_cap_saved_state *pci_find_saved_cap(
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	struct pci_dev *pci_dev, char cap)
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{
	struct pci_cap_saved_state *tmp;
	struct hlist_node *pos;

	hlist_for_each_entry(tmp, pos, &pci_dev->saved_cap_space, next) {
		if (tmp->cap_nr == cap)
			return tmp;
	}
	return NULL;
}

static inline void pci_add_saved_cap(struct pci_dev *pci_dev,
	struct pci_cap_saved_state *new_cap)
{
	hlist_add_head(&new_cap->next, &pci_dev->saved_cap_space);
}

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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 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 */
	unsigned char	secondary;	/* number of secondary bridge */
	unsigned char	subordinate;	/* max number of subordinate buses */
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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

/* 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 */
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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,
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					   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;
	char *name;
	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;
};

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#define	to_pci_driver(drv) container_of(drv, struct pci_driver, driver)
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556
/**
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 * 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.
 */
563
#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
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 * 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
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 * @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

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 *);
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int __must_check pcibios_enable_device(struct pci_dev *, int mask);
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char *pcibios_setup(char *str);
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/* Used only when drivers/pci/setup.c is used */
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resource_size_t pcibios_align_resource(void *, const struct resource *,
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				resource_size_t,
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				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 */

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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static inline struct pci_bus * __devinit pci_scan_bus(int bus, struct pci_ops *ops,
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					   void *sysdata)
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{
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	struct pci_bus *root_bus;
	root_bus = pci_scan_bus_parented(NULL, bus, ops, sysdata);
	if (root_bus)
		pci_bus_add_devices(root_bus);
	return root_bus;
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}
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struct pci_bus *pci_create_bus(struct device *parent, int bus,
			       struct pci_ops *ops, void *sysdata);
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(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);
extern void pci_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);
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int pci_bus_find_ext_capability(struct pci_bus *bus, unsigned int devfn,
				int cap);
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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(struct pci_dev *dev, int where, u8 *val)
{
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	return pci_bus_read_config_byte(dev->bus, dev->devfn, where, val);
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}
static inline int pci_read_config_word(struct pci_dev *dev, int where, u16 *val)
{
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	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(struct pci_dev *dev, int where,
					u32 *val)
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{
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	return pci_bus_read_config_dword(dev->bus, dev->devfn, where, val);
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}
static inline int pci_write_config_byte(struct pci_dev *dev, int where, u8 val)
{
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	return pci_bus_write_config_byte(dev->bus, dev->devfn, where, val);
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}
static inline int pci_write_config_word(struct pci_dev *dev, int where, u16 val)
{
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	return pci_bus_write_config_word(dev->bus, dev->devfn, where, val);
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}
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static inline int pci_write_config_dword(struct pci_dev *dev, int where,
					 u32 val)
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{
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	return pci_bus_write_config_dword(dev->bus, dev->devfn, where, val);
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}

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int __must_check pci_enable_device(struct pci_dev *dev);
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int __must_check pci_enable_device_io(struct pci_dev *dev);
int __must_check pci_enable_device_mem(struct pci_dev *dev);
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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);

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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);
void pci_set_master(struct pci_dev *dev);
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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
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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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void pci_msi_off(struct pci_dev *dev);
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int pci_set_dma_max_seg_size(struct pci_dev *dev, unsigned int size);
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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);
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int pcie_get_readrq(struct pci_dev *dev);
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int pcie_set_readrq(struct pci_dev *dev, int rq);
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int __pci_reset_function(struct pci_dev *dev);
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int pci_reset_function(struct pci_dev *dev);
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void pci_update_resource(struct pci_dev *dev, int resno);
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int __must_check pci_assign_resource(struct pci_dev *dev, int i);
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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);
int pci_restore_state(struct pci_dev *dev);
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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);
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int pci_wake_from_d3(struct pci_dev *dev, bool enable);
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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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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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/* 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);

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/* Functions for PCI Hotplug drivers to use */
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int pci_bus_find_capability(struct pci_bus *bus, unsigned int devfn, int cap);
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#ifdef CONFIG_HOTPLUG
unsigned int pci_rescan_bus(struct pci_bus *bus);
#endif
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/* 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);
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int pci_vpd_truncate(struct pci_dev *dev, size_t size);
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/* Helper functions for low-level code (drivers/pci/setup-[bus,res].c) */
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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);
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void pci_assign_unassigned_bridge_resources(struct pci_dev *bridge);
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void pdev_enable_device(struct pci_dev *);
void pdev_sort_resources(struct pci_dev *, struct resource_list *);
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int pci_enable_resources(struct pci_dev *, int mask);
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void pci_fixup_irqs(u8 (*)(struct pci_dev *, u8 *),
		    int (*)(struct pci_dev *, u8, u8));
#define HAVE_PCI_REQ_REGIONS	2
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int __must_check pci_request_regions(struct pci_dev *, const char *);
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int __must_check pci_request_regions_exclusive(struct pci_dev *, const char *);
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void pci_release_regions(struct pci_dev *);
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int __must_check pci_request_region(struct pci_dev *, int, const char *);
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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);
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int pci_request_selected_regions(struct pci_dev *, int, const char *);
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int pci_request_selected_regions_exclusive(struct pci_dev *, int, const char *);
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void pci_release_selected_regions(struct pci_dev *, int);
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/* drivers/pci/bus.c */
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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);

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#define pci_bus_for_each_resource(bus, res, i)				\
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	for (i = 0;							\
	    (res = pci_bus_resource_n(bus, i)) || i < PCI_BRIDGE_RESOURCE_NUM; \
	     i++)
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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,
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			resource_size_t (*alignf)(void *,
						  const struct resource *,
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						  resource_size_t,
						  resource_size_t),
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			void *alignf_data);
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void pci_enable_bridges(struct pci_bus *bus);

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/* Proper probing supporting hot-pluggable devices */
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int __must_check __pci_register_driver(struct pci_driver *, struct module *,
				       const char *mod_name);
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/*
 * 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)
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void pci_unregister_driver(struct pci_driver *dev);
void pci_remove_behind_bridge(struct pci_dev *dev);
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);
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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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void pci_walk_bus(struct pci_bus *top, int (*cb)(struct pci_dev *, void *),
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		  void *userdata);
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int pci_cfg_space_size_ext(struct pci_dev *dev);
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int pci_cfg_space_size(struct pci_dev *dev);
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unsigned char pci_bus_max_busnr(struct pci_bus *bus);
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int pci_set_vga_state(struct pci_dev *pdev, bool decode,
		      unsigned int command_bits, bool change_bridge);
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/* kmem_cache style wrapper around pci_alloc_consistent() */

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#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)

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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
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static inline int pci_enable_msi_block(struct pci_dev *dev, unsigned int nvec)
942 943 944 945
{
	return -1;
}

946 947
static inline void pci_msi_shutdown(struct pci_dev *dev)
{ }
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static inline void pci_disable_msi(struct pci_dev *dev)
{ }

951 952 953 954
static inline int pci_msix_table_size(struct pci_dev *dev)
{
	return 0;
}
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static inline int pci_enable_msix(struct pci_dev *dev,
				  struct msix_entry *entries, int nvec)
{
	return -1;
}

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static inline void pci_msix_shutdown(struct pci_dev *dev)
{ }
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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)
{ }
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static inline int pci_msi_enabled(void)
{
	return 0;
}
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#else
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extern int pci_enable_msi_block(struct pci_dev *dev, unsigned int nvec);
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extern void pci_msi_shutdown(struct pci_dev *dev);
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extern void pci_disable_msi(struct pci_dev *dev);
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extern int pci_msix_table_size(struct pci_dev *dev);
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extern int pci_enable_msix(struct pci_dev *dev,
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	struct msix_entry *entries, int nvec);
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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);
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extern void pci_restore_msi_state(struct pci_dev *dev);
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extern int pci_msi_enabled(void);
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#endif

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#ifndef CONFIG_PCIEASPM
static inline int pcie_aspm_enabled(void)
{
	return 0;
}
#else
extern int pcie_aspm_enabled(void);
#endif

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#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

1009 1010
#define pci_enable_msi(pdev)	pci_enable_msi_block(pdev, 1)

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#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 */

1017 1018 1019
extern void pci_block_user_cfg_access(struct pci_dev *dev);
extern void pci_unblock_user_cfg_access(struct pci_dev *dev);

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/*
 * 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.
 */
1025 1026 1027 1028
#ifdef CONFIG_PCI_DOMAINS
extern int pci_domains_supported;
#else
enum { pci_domains_supported = 0 };
1029 1030 1031 1032 1033
static inline int pci_domain_nr(struct pci_bus *bus)
{
	return 0;
}

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static inline int pci_proc_domain(struct pci_bus *bus)
{
	return 0;
}
1038
#endif /* CONFIG_PCI_DOMAINS */
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/* some architectures require additional setup to direct VGA traffic */
typedef int (*arch_set_vga_state_t)(struct pci_dev *pdev, bool decode,
		      unsigned int command_bits, bool change_bridge);
extern void pci_register_set_vga_state(arch_set_vga_state_t func);

1045
#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.
 */

1052 1053 1054
#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; }
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#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,)

1063
static inline struct pci_dev *pci_get_device(unsigned int vendor,
1064 1065 1066 1067 1068
					     unsigned int device,
					     struct pci_dev *from)
{
	return NULL;
}
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static inline struct pci_dev *pci_get_subsys(unsigned int vendor,
					     unsigned int device,
					     unsigned int ss_vendor,
					     unsigned int ss_device,
1074
					     struct pci_dev *from)
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{
	return NULL;
}
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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)

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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;
}

1105 1106 1107 1108 1109
static inline int pci_set_consistent_dma_mask(struct pci_dev *dev, u64 mask)
{
	return -EIO;
}

1110 1111 1112 1113 1114 1115
static inline int pci_set_dma_max_seg_size(struct pci_dev *dev,
					unsigned int size)
{
	return -EIO;
}

1116 1117 1118 1119 1120 1121
static inline int pci_set_dma_seg_boundary(struct pci_dev *dev,
					unsigned long mask)
{
	return -EIO;
}

1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156
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 */
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static inline int pci_save_state(struct pci_dev *dev)
{
	return 0;
}

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

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;
}

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

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

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

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#define dev_is_pci(d) (false)
#define dev_is_pf(d) (false)
#define dev_num_vf(d) (0)
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#endif /* CONFIG_PCI */
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/* Include architecture-dependent settings and functions */

#include <asm/pci.h>
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#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 */
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#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) \
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	((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.
 */
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static inline void *pci_get_drvdata(struct pci_dev *pdev)
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{
	return dev_get_drvdata(&pdev->dev);
}

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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.
 */
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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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}

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/* 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,
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		const struct resource *rsrc, resource_size_t *start,
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		resource_size_t *end)
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{
	*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 {
	u16 vendor, device;	/* You can use PCI_ANY_ID here of course */
	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 */
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	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... */
#define DECLARE_PCI_FIXUP_SECTION(section, name, vendor, device, hook)	\
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	static const struct pci_fixup __pci_fixup_##name __used		\
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	__attribute__((__section__(#section))) = { vendor, device, hook };
#define DECLARE_PCI_FIXUP_EARLY(vendor, device, hook)			\
	DECLARE_PCI_FIXUP_SECTION(.pci_fixup_early,			\
			vendor##device##hook, vendor, device, hook)
#define DECLARE_PCI_FIXUP_HEADER(vendor, device, hook)			\
	DECLARE_PCI_FIXUP_SECTION(.pci_fixup_header,			\
			vendor##device##hook, vendor, device, hook)
#define DECLARE_PCI_FIXUP_FINAL(vendor, device, hook)			\
	DECLARE_PCI_FIXUP_SECTION(.pci_fixup_final,			\
			vendor##device##hook, vendor, device, hook)
#define DECLARE_PCI_FIXUP_ENABLE(vendor, device, hook)			\
	DECLARE_PCI_FIXUP_SECTION(.pci_fixup_enable,			\
			vendor##device##hook, vendor, device, hook)
1313 1314 1315
#define DECLARE_PCI_FIXUP_RESUME(vendor, device, hook)			\
	DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume,			\
			resume##vendor##device##hook, vendor, device, hook)
1316 1317 1318 1319 1320 1321
#define DECLARE_PCI_FIXUP_RESUME_EARLY(vendor, device, hook)		\
	DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume_early,		\
			resume_early##vendor##device##hook, vendor, device, hook)
#define DECLARE_PCI_FIXUP_SUSPEND(vendor, device, hook)			\
	DECLARE_PCI_FIXUP_SECTION(.pci_fixup_suspend,			\
			suspend##vendor##device##hook, vendor, device, 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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#else
static inline void pci_fixup_device(enum pci_fixup_pass pass,
				    struct pci_dev *dev) {}
#endif
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1330
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, u16 mask, const char *name);
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int pcim_iomap_regions_request_all(struct pci_dev *pdev, u16 mask,
				   const char *name);
1336
void pcim_iounmap_regions(struct pci_dev *pdev, u16 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;
1349
extern u8 __devinitdata pci_dfl_cache_line_size;
1350
extern u8 pci_cache_line_size;
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1352 1353 1354
extern unsigned long pci_hotplug_io_size;
extern unsigned long pci_hotplug_mem_size;

1355 1356 1357 1358
int pcibios_add_platform_entries(struct pci_dev *dev);
void pcibios_disable_device(struct pci_dev *dev);
int pcibios_set_pcie_reset_state(struct pci_dev *dev,
				 enum pcie_reset_state state);
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1360
#ifdef CONFIG_PCI_MMCONFIG
1361
extern void __init pci_mmcfg_early_init(void);
1362 1363
extern void __init pci_mmcfg_late_init(void);
#else
1364
static inline void pci_mmcfg_early_init(void) { }
1365 1366 1367
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);
1375
extern irqreturn_t pci_sriov_migration(struct pci_dev *dev);
1376
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)
{
}
1385 1386 1387 1388
static inline irqreturn_t pci_sriov_migration(struct pci_dev *dev)
{
	return IRQ_NONE;
}
1389 1390 1391 1392
static inline int pci_num_vf(struct pci_dev *dev)
{
	return 0;
}
1393 1394
#endif

1395 1396 1397 1398 1399
#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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1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451
#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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1453 1454
#define PCI_VPD_INFO_FLD_HDR_SIZE	3

1455 1456 1457 1458
#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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/**
 * 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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Linus Torvalds 已提交
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#endif /* __KERNEL__ */
#endif /* LINUX_PCI_H */