Linux-2.6.33.2/include/linux/pci.h
/*
* 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
#include <linux/pci_regs.h> /* The pci register defines */
/*
* 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
*/
#define PCI_DEVFN(slot, func) ((((slot) & 0x1f) << 3) | ((func) & 0x07))
#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__
#include <linux/mod_devicetable.h>
#include <linux/types.h>
#include <linux/init.h>
#include <linux/ioport.h>
#include <linux/list.h>
#include <linux/compiler.h>
#include <linux/errno.h>
#include <linux/kobject.h>
#include <asm/atomic.h>
#include <linux/device.h>
#include <linux/io.h>
#include <linux/irqreturn.h>
/* Include the ID list */
#include <linux/pci_ids.h>
/* 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;
};
static inline const char *pci_slot_name(const struct pci_slot *slot)
{
return kobject_name(&slot->kobj);
}
/* 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
/*
* 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,
/* device specific resources */
#ifdef CONFIG_PCI_IOV
PCI_IOV_RESOURCES,
PCI_IOV_RESOURCE_END = PCI_IOV_RESOURCES + PCI_SRIOV_NUM_BARS - 1,
#endif
/* 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
};
typedef int __bitwise pci_power_t;
#define PCI_D0 ((pci_power_t __force) 0)
#define PCI_D1 ((pci_power_t __force) 1)
#define PCI_D2 ((pci_power_t __force) 2)
#define PCI_D3hot ((pci_power_t __force) 3)
#define PCI_D3cold ((pci_power_t __force) 4)
#define PCI_UNKNOWN ((pci_power_t __force) 5)
#define PCI_POWER_ERROR ((pci_power_t __force) -1)
/* 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];
}
#define PCI_PM_D2_DELAY 200
#define PCI_PM_D3_WAIT 10
#define PCI_PM_BUS_WAIT 50
/** 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,
};
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
};
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,
/* Device configuration is irrevocably lost if disabled into D3 */
PCI_DEV_FLAGS_NO_D3 = (__force pci_dev_flags_t) 2,
};
enum pci_irq_reroute_variant {
INTEL_IRQ_REROUTE_VARIANT = 1,
MAX_IRQ_REROUTE_VARIANTS = 3
};
typedef unsigned short __bitwise pci_bus_flags_t;
enum pci_bus_flags {
PCI_BUS_FLAGS_NO_MSI = (__force pci_bus_flags_t) 1,
PCI_BUS_FLAGS_NO_MMRBC = (__force pci_bus_flags_t) 2,
};
struct pci_cap_saved_state {
struct hlist_node next;
char cap_nr;
u32 data[0];
};
struct pcie_link_state;
struct pci_vpd;
struct pci_sriov;
struct pci_ats;
/*
* 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 */
struct pci_slot *slot; /* Physical slot this device is in */
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) */
u8 revision; /* PCI revision, low byte of class word */
u8 hdr_type; /* PCI header type (`multi' flag masked out) */
u8 pcie_cap; /* PCI-E capability offset */
u8 pcie_type; /* PCI-E device/port type */
u8 rom_base_reg; /* which config register controls the ROM */
u8 pin; /* which interrupt pin this device uses */
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. */
struct device_dma_parameters dma_parms;
pci_power_t current_state; /* Current operating state. In ACPI-speak,
this is D0-D3, D0 being fully functional,
and D3 being off. */
int pm_cap; /* PM capability offset in the
configuration space */
unsigned int pme_support:5; /* Bitmask of states from which PME#
can be generated */
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 */
unsigned int wakeup_prepared:1;
unsigned int d3_delay; /* D3->D0 transition time in ms */
#ifdef CONFIG_PCIEASPM
struct pcie_link_state *link_state; /* ASPM link state. */
#endif
pci_channel_state_t error_state; /* current connectivity state */
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 */
unsigned int is_added:1;
unsigned int is_busmaster:1; /* device is busmaster */
unsigned int no_msi:1; /* device may not use msi */
unsigned int block_ucfg_access:1; /* userspace config space access is blocked */
unsigned int broken_parity_status:1; /* Device generates false positive parity */
unsigned int irq_reroute_variant:2; /* device needs IRQ rerouting variant */
unsigned int msi_enabled:1;
unsigned int msix_enabled:1;
unsigned int ari_enabled:1; /* ARI forwarding */
unsigned int is_managed:1;
unsigned int is_pcie:1;
unsigned int needs_freset:1; /* Dev requires fundamental reset */
unsigned int state_saved:1;
unsigned int is_physfn:1;
unsigned int is_virtfn:1;
unsigned int reset_fn:1;
unsigned int is_hotplug_bridge:1;
unsigned int aer_firmware_first:1;
pci_dev_flags_t dev_flags;
atomic_t enable_cnt; /* pci_enable_device has been called */
u32 saved_config_space[16]; /* config space saved at suspend time */
struct hlist_head saved_cap_space;
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 */
struct bin_attribute *res_attr_wc[DEVICE_COUNT_RESOURCE]; /* sysfs file for WC mapping of resources */
#ifdef CONFIG_PCI_MSI
struct list_head msi_list;
#endif
struct pci_vpd *vpd;
#ifdef CONFIG_PCI_IOV
union {
struct pci_sriov *sriov; /* SR-IOV capability related */
struct pci_dev *physfn; /* the PF this VF is associated with */
};
struct pci_ats *ats; /* Address Translation Service */
#endif
};
extern struct pci_dev *alloc_pci_dev(void);
#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)
static inline int pci_channel_offline(struct pci_dev *pdev)
{
return (pdev->error_state != pci_channel_io_normal);
}
static inline struct pci_cap_saved_state *pci_find_saved_cap(
struct pci_dev *pci_dev, char cap)
{
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);
}
#ifndef PCI_BUS_NUM_RESOURCES
#define PCI_BUS_NUM_RESOURCES 16
#endif
#define PCI_REGION_FLAG_MASK 0x0fU /* These bits of resource flags tell us the PCI region flags */
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 */
struct list_head slots; /* list of slots on this bus */
struct resource *resource[PCI_BUS_NUM_RESOURCES];
/* address space routed to this bus */
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 */
char name[48];
unsigned short bridge_ctl; /* manage NO_ISA/FBB/et al behaviors */
pci_bus_flags_t bus_flags; /* Inherited by child busses */
struct device *bridge;
struct device dev;
struct bin_attribute *legacy_io; /* legacy I/O for this bus */
struct bin_attribute *legacy_mem; /* legacy mem */
unsigned int is_added:1;
};
#define pci_bus_b(n) list_entry(n, struct pci_bus, node)
#define to_pci_bus(n) container_of(n, struct pci_bus, dev)
/*
* 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);
}
#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
/*
* 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);
};
/*
* 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);
struct pci_bus_region {
resource_size_t start;
resource_size_t end;
};
struct pci_dynids {
spinlock_t lock; /* protects list, index */
struct list_head list; /* for IDs added at runtime */
};
/* ---------------------------------------------------------------- */
/** PCI Error Recovery System (PCI-ERS). If a PCI device driver provides
* a set of callbacks in struct pci_error_handlers, then that device driver
* 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 */
struct pci_error_handlers {
/* PCI bus error detected on this device */
pci_ers_result_t (*error_detected)(struct pci_dev *dev,
enum pci_channel_state error);
/* 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);
};
/* ---------------------------------------------------------------- */
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 */
int (*suspend_late) (struct pci_dev *dev, pm_message_t state);
int (*resume_early) (struct pci_dev *dev);
int (*resume) (struct pci_dev *dev); /* Device woken up */
void (*shutdown) (struct pci_dev *dev);
struct pci_error_handlers *err_handler;
struct device_driver driver;
struct pci_dynids dynids;
};
#define to_pci_driver(drv) container_of(drv, struct pci_driver, driver)
/**
* DEFINE_PCI_DEVICE_TABLE - macro used to describe a pci device table
* @_table: device table name
*
* This macro is used to create a struct pci_device_id array (a device table)
* in a generic manner.
*/
#define DEFINE_PCI_DEVICE_TABLE(_table) \
const struct pci_device_id _table[] __devinitconst
/**
* 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
* specific PCI class. The vendor, device, subvendor, and subdevice
* 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
/**
* PCI_VDEVICE - macro used to describe a specific pci device in short form
* @vendor: the vendor name
* @device: the 16 bit PCI Device ID
*
* 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
/* 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 */
/* Some device drivers need know if pci is initiated */
extern int no_pci_devices(void);
void pcibios_fixup_bus(struct pci_bus *);
int __must_check pcibios_enable_device(struct pci_dev *, int mask);
char *pcibios_setup(char *str);
/* Used only when drivers/pci/setup.c is used */
void pcibios_align_resource(void *, struct resource *, resource_size_t,
resource_size_t);
void pcibios_update_irq(struct pci_dev *, int irq);
/* Weak but can be overriden by arch */
void pci_fixup_cardbus(struct pci_bus *);
/* Generic PCI functions used internally */
extern struct pci_bus *pci_find_bus(int domain, int busnr);
void pci_bus_add_devices(const struct pci_bus *bus);
struct pci_bus *pci_scan_bus_parented(struct device *parent, int bus,
struct pci_ops *ops, void *sysdata);
static inline struct pci_bus * __devinit pci_scan_bus(int bus, struct pci_ops *ops,
void *sysdata)
{
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;
}
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);
struct pci_slot *pci_create_slot(struct pci_bus *parent, int slot_nr,
const char *name,
struct hotplug_slot *hotplug);
void pci_destroy_slot(struct pci_slot *slot);
void pci_renumber_slot(struct pci_slot *slot, int slot_nr);
int pci_scan_slot(struct pci_bus *bus, int devfn);
struct pci_dev *pci_scan_single_device(struct pci_bus *bus, int devfn);
void pci_device_add(struct pci_dev *dev, struct pci_bus *bus);
unsigned int pci_scan_child_bus(struct pci_bus *bus);
int __must_check pci_bus_add_device(struct pci_dev *dev);
void pci_read_bridge_bases(struct pci_bus *child);
struct resource *pci_find_parent_resource(const struct pci_dev *dev,
struct resource *res);
u8 pci_swizzle_interrupt_pin(struct pci_dev *dev, u8 pin);
int pci_get_interrupt_pin(struct pci_dev *dev, struct pci_dev **bridge);
u8 pci_common_swizzle(struct pci_dev *dev, u8 *pinp);
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);
extern void pci_stop_bus_device(struct pci_dev *dev);
void pci_setup_cardbus(struct pci_bus *bus);
extern void pci_sort_breadthfirst(void);
/* Generic PCI functions exported to card drivers */
#ifdef CONFIG_PCI_LEGACY
struct pci_dev __deprecated *pci_find_device(unsigned int vendor,
unsigned int device,
struct pci_dev *from);
#endif /* CONFIG_PCI_LEGACY */
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);
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);
struct pci_bus *pci_find_next_bus(const struct pci_bus *from);
struct pci_dev *pci_get_device(unsigned int vendor, unsigned int device,
struct pci_dev *from);
struct pci_dev *pci_get_subsys(unsigned int vendor, unsigned int device,
unsigned int ss_vendor, unsigned int ss_device,
struct pci_dev *from);
struct pci_dev *pci_get_slot(struct pci_bus *bus, unsigned int devfn);
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);
}
struct pci_dev *pci_get_class(unsigned int class, struct pci_dev *from);
int pci_dev_present(const struct pci_device_id *ids);
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);
struct pci_ops *pci_bus_set_ops(struct pci_bus *bus, struct pci_ops *ops);
static inline int pci_read_config_byte(struct pci_dev *dev, int where, u8 *val)
{
return pci_bus_read_config_byte(dev->bus, dev->devfn, where, val);
}
static inline int pci_read_config_word(struct pci_dev *dev, int where, u16 *val)
{
return pci_bus_read_config_word(dev->bus, dev->devfn, where, val);
}
static inline int pci_read_config_dword(struct pci_dev *dev, int where,
u32 *val)
{
return pci_bus_read_config_dword(dev->bus, dev->devfn, where, val);
}
static inline int pci_write_config_byte(struct pci_dev *dev, int where, u8 val)
{
return pci_bus_write_config_byte(dev->bus, dev->devfn, where, val);
}
static inline int pci_write_config_word(struct pci_dev *dev, int where, u16 val)
{
return pci_bus_write_config_word(dev->bus, dev->devfn, where, val);
}
static inline int pci_write_config_dword(struct pci_dev *dev, int where,
u32 val)
{
return pci_bus_write_config_dword(dev->bus, dev->devfn, where, val);
}
int __must_check pci_enable_device(struct pci_dev *dev);
int __must_check pci_enable_device_io(struct pci_dev *dev);
int __must_check pci_enable_device_mem(struct pci_dev *dev);
int __must_check pci_reenable_device(struct pci_dev *);
int __must_check pcim_enable_device(struct pci_dev *pdev);
void pcim_pin_device(struct pci_dev *pdev);
static inline int pci_is_enabled(struct pci_dev *pdev)
{
return (atomic_read(&pdev->enable_cnt) > 0);
}
static inline int pci_is_managed(struct pci_dev *pdev)
{
return pdev->is_managed;
}
void pci_disable_device(struct pci_dev *dev);
void pci_set_master(struct pci_dev *dev);
void pci_clear_master(struct pci_dev *dev);
int pci_set_pcie_reset_state(struct pci_dev *dev, enum pcie_reset_state state);
int pci_set_cacheline_size(struct pci_dev *dev);
#define HAVE_PCI_SET_MWI
int __must_check pci_set_mwi(struct pci_dev *dev);
int pci_try_set_mwi(struct pci_dev *dev);
void pci_clear_mwi(struct pci_dev *dev);
void pci_intx(struct pci_dev *dev, int enable);
void pci_msi_off(struct pci_dev *dev);
int pci_set_dma_mask(struct pci_dev *dev, u64 mask);
int pci_set_consistent_dma_mask(struct pci_dev *dev, u64 mask);
int pci_set_dma_max_seg_size(struct pci_dev *dev, unsigned int size);
int pci_set_dma_seg_boundary(struct pci_dev *dev, unsigned long mask);
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);
int pcie_get_readrq(struct pci_dev *dev);
int pcie_set_readrq(struct pci_dev *dev, int rq);
int __pci_reset_function(struct pci_dev *dev);
int pci_reset_function(struct pci_dev *dev);
void pci_update_resource(struct pci_dev *dev, int resno);
int __must_check pci_assign_resource(struct pci_dev *dev, int i);
int pci_select_bars(struct pci_dev *dev, unsigned long flags);
/* ROM control related routines */
int pci_enable_rom(struct pci_dev *pdev);
void pci_disable_rom(struct pci_dev *pdev);
void __iomem __must_check *pci_map_rom(struct pci_dev *pdev, size_t *size);
void pci_unmap_rom(struct pci_dev *pdev, void __iomem *rom);
size_t pci_get_rom_size(struct pci_dev *pdev, void __iomem *rom, size_t size);
/* Power management related routines */
int pci_save_state(struct pci_dev *dev);
int pci_restore_state(struct pci_dev *dev);
int __pci_complete_power_transition(struct pci_dev *dev, pci_power_t state);
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);
bool pci_pme_capable(struct pci_dev *dev, pci_power_t state);
void pci_pme_active(struct pci_dev *dev, bool enable);
int pci_enable_wake(struct pci_dev *dev, pci_power_t state, bool enable);
int pci_wake_from_d3(struct pci_dev *dev, bool enable);
pci_power_t pci_target_state(struct pci_dev *dev);
int pci_prepare_to_sleep(struct pci_dev *dev);
int pci_back_from_sleep(struct pci_dev *dev);
/* 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);
/* Functions for PCI Hotplug drivers to use */
int pci_bus_find_capability(struct pci_bus *bus, unsigned int devfn, int cap);
#ifdef CONFIG_HOTPLUG
unsigned int pci_rescan_bus(struct pci_bus *bus);
#endif
/* 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);
int pci_vpd_truncate(struct pci_dev *dev, size_t size);
/* Helper functions for low-level code (drivers/pci/setup-[bus,res].c) */
void pci_bus_assign_resources(const struct pci_bus *bus);
void pci_bus_size_bridges(struct pci_bus *bus);
int pci_claim_resource(struct pci_dev *, int);
void pci_assign_unassigned_resources(void);
void pdev_enable_device(struct pci_dev *);
void pdev_sort_resources(struct pci_dev *, struct resource_list *);
int pci_enable_resources(struct pci_dev *, int mask);
void pci_fixup_irqs(u8 (*)(struct pci_dev *, u8 *),
int (*)(struct pci_dev *, u8, u8));
#define HAVE_PCI_REQ_REGIONS 2
int __must_check pci_request_regions(struct pci_dev *, const char *);
int __must_check pci_request_regions_exclusive(struct pci_dev *, const char *);
void pci_release_regions(struct pci_dev *);
int __must_check pci_request_region(struct pci_dev *, int, const char *);
int __must_check pci_request_region_exclusive(struct pci_dev *, int, const char *);
void pci_release_region(struct pci_dev *, int);
int pci_request_selected_regions(struct pci_dev *, int, const char *);
int pci_request_selected_regions_exclusive(struct pci_dev *, int, const char *);
void pci_release_selected_regions(struct pci_dev *, int);
/* drivers/pci/bus.c */
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,
void (*alignf)(void *, struct resource *,
resource_size_t, resource_size_t),
void *alignf_data);
void pci_enable_bridges(struct pci_bus *bus);
/* Proper probing supporting hot-pluggable devices */
int __must_check __pci_register_driver(struct pci_driver *, struct module *,
const char *mod_name);
/*
* 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)
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);
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);
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);
void pci_walk_bus(struct pci_bus *top, int (*cb)(struct pci_dev *, void *),
void *userdata);
int pci_cfg_space_size_ext(struct pci_dev *dev);
int pci_cfg_space_size(struct pci_dev *dev);
unsigned char pci_bus_max_busnr(struct pci_bus *bus);
int pci_set_vga_state(struct pci_dev *pdev, bool decode,
unsigned int command_bits, bool change_bridge);
/* kmem_cache style wrapper around pci_alloc_consistent() */
#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)
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 */
};
struct msix_entry {
u32 vector; /* kernel uses to write allocated vector */
u16 entry; /* driver uses to specify entry, OS writes */
};
#ifndef CONFIG_PCI_MSI
static inline int pci_enable_msi_block(struct pci_dev *dev, unsigned int nvec)
{
return -1;
}
static inline void pci_msi_shutdown(struct pci_dev *dev)
{ }
static inline void pci_disable_msi(struct pci_dev *dev)
{ }
static inline int pci_msix_table_size(struct pci_dev *dev)
{
return 0;
}
static inline int pci_enable_msix(struct pci_dev *dev,
struct msix_entry *entries, int nvec)
{
return -1;
}
static inline void pci_msix_shutdown(struct pci_dev *dev)
{ }
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)
{ }
static inline int pci_msi_enabled(void)
{
return 0;
}
#else
extern int pci_enable_msi_block(struct pci_dev *dev, unsigned int nvec);
extern void pci_msi_shutdown(struct pci_dev *dev);
extern void pci_disable_msi(struct pci_dev *dev);
extern int pci_msix_table_size(struct pci_dev *dev);
extern int pci_enable_msix(struct pci_dev *dev,
struct msix_entry *entries, int nvec);
extern void pci_msix_shutdown(struct pci_dev *dev);
extern void pci_disable_msix(struct pci_dev *dev);
extern void msi_remove_pci_irq_vectors(struct pci_dev *dev);
extern void pci_restore_msi_state(struct pci_dev *dev);
extern int pci_msi_enabled(void);
#endif
#ifndef CONFIG_PCIEASPM
static inline int pcie_aspm_enabled(void)
{
return 0;
}
#else
extern int pcie_aspm_enabled(void);
#endif
#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
#define pci_enable_msi(pdev) pci_enable_msi_block(pdev, 1)
#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 */
extern void pci_block_user_cfg_access(struct pci_dev *dev);
extern void pci_unblock_user_cfg_access(struct pci_dev *dev);
/*
* 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.
*/
#ifdef CONFIG_PCI_DOMAINS
extern int pci_domains_supported;
#else
enum { pci_domains_supported = 0 };
static inline int pci_domain_nr(struct pci_bus *bus)
{
return 0;
}
static inline int pci_proc_domain(struct pci_bus *bus)
{
return 0;
}
#endif /* CONFIG_PCI_DOMAINS */
#else /* CONFIG_PCI is not enabled */
/*
* If the system does not have PCI, clearly these return errors. Define
* these as simple inline functions to avoid hair in drivers.
*/
#define _PCI_NOP(o, s, t) \
static inline int pci_##o##_config_##s(struct pci_dev *dev, \
int where, t val) \
{ return PCIBIOS_FUNC_NOT_SUPPORTED; }
#define _PCI_NOP_ALL(o, x) _PCI_NOP(o, byte, u8 x) \
_PCI_NOP(o, word, u16 x) \
_PCI_NOP(o, dword, u32 x)
_PCI_NOP_ALL(read, *)
_PCI_NOP_ALL(write,)
static inline struct pci_dev *pci_find_device(unsigned int vendor,
unsigned int device,
struct pci_dev *from)
{
return NULL;
}
static inline struct pci_dev *pci_get_device(unsigned int vendor,
unsigned int device,
struct pci_dev *from)
{
return NULL;
}
static inline struct pci_dev *pci_get_subsys(unsigned int vendor,
unsigned int device,
unsigned int ss_vendor,
unsigned int ss_device,
struct pci_dev *from)
{
return NULL;
}
static inline struct pci_dev *pci_get_class(unsigned int class,
struct pci_dev *from)
{
return NULL;
}
#define pci_dev_present(ids) (0)
#define no_pci_devices() (1)
#define pci_dev_put(dev) do { } while (0)
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;
}
static inline int pci_set_consistent_dma_mask(struct pci_dev *dev, u64 mask)
{
return -EIO;
}
static inline int pci_set_dma_max_seg_size(struct pci_dev *dev,
unsigned int size)
{
return -EIO;
}
static inline int pci_set_dma_seg_boundary(struct pci_dev *dev,
unsigned long mask)
{
return -EIO;
}
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;
}
/* Power management related routines */
static inline int pci_save_state(struct pci_dev *dev)
{
return 0;
}
static inline int pci_restore_state(struct pci_dev *dev)
{
return 0;
}
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)
{ }
#define pci_dma_burst_advice(pdev, strat, strategy_parameter) do { } while (0)
static inline void pci_block_user_cfg_access(struct pci_dev *dev)
{ }
static inline void pci_unblock_user_cfg_access(struct pci_dev *dev)
{ }
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; }
#endif /* CONFIG_PCI */
/* Include architecture-dependent settings and functions */
#include <asm/pci.h>
#ifndef PCIBIOS_MAX_MEM_32
#define PCIBIOS_MAX_MEM_32 (-1)
#endif
/* these helpers provide future and backwards compatibility
* for accessing popular PCI BAR info */
#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)
#define pci_resource_len(dev,bar) \
((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))
/* 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.
*/
static inline void *pci_get_drvdata(struct pci_dev *pdev)
{
return dev_get_drvdata(&pdev->dev);
}
static inline void pci_set_drvdata(struct pci_dev *pdev, void *data)
{
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.
*/
static inline const char *pci_name(const struct pci_dev *pdev)
{
return dev_name(&pdev->dev);
}
/* 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,
const struct resource *rsrc, resource_size_t *start,
resource_size_t *end)
{
*start = rsrc->start;
*end = rsrc->end;
}
#endif /* HAVE_ARCH_PCI_RESOURCE_TO_USER */
/*
* 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 */
pci_fixup_resume, /* pci_device_resume() */
pci_fixup_suspend, /* pci_device_suspend */
pci_fixup_resume_early, /* pci_device_resume_early() */
};
/* Anonymous variables would be nice... */
#define DECLARE_PCI_FIXUP_SECTION(section, name, vendor, device, hook) \
static const struct pci_fixup __pci_fixup_##name __used \
__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)
#define DECLARE_PCI_FIXUP_RESUME(vendor, device, hook) \
DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume, \
resume##vendor##device##hook, vendor, device, hook)
#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)
void pci_fixup_device(enum pci_fixup_pass pass, struct pci_dev *dev);
void __iomem *pcim_iomap(struct pci_dev *pdev, int bar, unsigned long maxlen);
void pcim_iounmap(struct pci_dev *pdev, void __iomem *addr);
void __iomem * const *pcim_iomap_table(struct pci_dev *pdev);
int pcim_iomap_regions(struct pci_dev *pdev, u16 mask, const char *name);
int pcim_iomap_regions_request_all(struct pci_dev *pdev, u16 mask,
const char *name);
void pcim_iounmap_regions(struct pci_dev *pdev, u16 mask);
extern int pci_pci_problems;
#define PCIPCI_FAIL 1 /* No PCI PCI DMA */
#define PCIPCI_TRITON 2
#define PCIPCI_NATOMA 4
#define PCIPCI_VIAETBF 8
#define PCIPCI_VSFX 16
#define PCIPCI_ALIMAGIK 32 /* Need low latency setting */
#define PCIAGP_FAIL 64 /* No PCI to AGP DMA */
extern unsigned long pci_cardbus_io_size;
extern unsigned long pci_cardbus_mem_size;
extern u8 __devinitdata pci_dfl_cache_line_size;
extern u8 pci_cache_line_size;
extern unsigned long pci_hotplug_io_size;
extern unsigned long pci_hotplug_mem_size;
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);
#ifdef CONFIG_PCI_MMCONFIG
extern void __init pci_mmcfg_early_init(void);
extern void __init pci_mmcfg_late_init(void);
#else
static inline void pci_mmcfg_early_init(void) { }
static inline void pci_mmcfg_late_init(void) { }
#endif
int pci_ext_cfg_avail(struct pci_dev *dev);
void __iomem *pci_ioremap_bar(struct pci_dev *pdev, int bar);
#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);
extern irqreturn_t pci_sriov_migration(struct pci_dev *dev);
#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)
{
}
static inline irqreturn_t pci_sriov_migration(struct pci_dev *dev)
{
return IRQ_NONE;
}
#endif
#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
/**
* 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;
}
/**
* 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);
}
void pci_request_acs(void);
#endif /* __KERNEL__ */
#endif /* LINUX_PCI_H */