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linux-stable/include/linux/pci.h
Amey Narkhede 6913924480 PCI: Cache PCIe Device Capabilities register 
Add a new member called devcap in struct pci_dev for caching the PCIe
Device Capabilities register to avoid reading PCI_EXP_DEVCAP multiple
times.

Refactor pcie_has_flr() to use cached device capabilities.

Link: https://lore.kernel.org/r/20210817180500.1253-2-ameynarkhede03@gmail.com
Signed-off-by: Amey Narkhede <ameynarkhede03@gmail.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Raphael Norwitz <raphael.norwitz@nutanix.com>
2021-08-17 15:21:35 -05:00

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/* SPDX-License-Identifier: GPL-2.0 */
/*
* pci.h
*
* PCI defines and function prototypes
* Copyright 1994, Drew Eckhardt
* Copyright 1997--1999 Martin Mares <mj@ucw.cz>
*
* PCI Express ASPM defines and function prototypes
* Copyright (c) 2007 Intel Corp.
* Zhang Yanmin (yanmin.zhang@intel.com)
* Shaohua Li (shaohua.li@intel.com)
*
* 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 Express Specification
* PCI System Design Guide
*/
#ifndef LINUX_PCI_H
#define LINUX_PCI_H
#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 <linux/atomic.h>
#include <linux/device.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/resource_ext.h>
#include <uapi/linux/pci.h>
#include <linux/pci_ids.h>
#define PCI_STATUS_ERROR_BITS (PCI_STATUS_DETECTED_PARITY | \
PCI_STATUS_SIG_SYSTEM_ERROR | \
PCI_STATUS_REC_MASTER_ABORT | \
PCI_STATUS_REC_TARGET_ABORT | \
PCI_STATUS_SIG_TARGET_ABORT | \
PCI_STATUS_PARITY)
/*
* 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
*
* PCI_DEVFN(), PCI_SLOT(), and PCI_FUNC() are defined in uapi/linux/pci.h.
* In the interest of not exposing interfaces to user-space unnecessarily,
* the following kernel-only defines are being added here.
*/
#define PCI_DEVID(bus, devfn) ((((u16)(bus)) << 8) | (devfn))
/* return bus from PCI devid = ((u16)bus_number) << 8) | devfn */
#define PCI_BUS_NUM(x) (((x) >> 8) & 0xff)
/* pci_slot represents a physical slot */
struct pci_slot {
struct pci_bus *bus; /* Bus this slot is on */
struct list_head list; /* Node in list of slots */
struct hotplug_slot *hotplug; /* Hotplug info (move here) */
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
};
/* For PCI devices, the region numbers are assigned this way: */
enum {
/* #0-5: standard PCI resources */
PCI_STD_RESOURCES,
PCI_STD_RESOURCE_END = PCI_STD_RESOURCES + PCI_STD_NUM_BARS - 1,
/* #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
/* PCI-to-PCI (P2P) bridge windows */
#define PCI_BRIDGE_IO_WINDOW (PCI_BRIDGE_RESOURCES + 0)
#define PCI_BRIDGE_MEM_WINDOW (PCI_BRIDGE_RESOURCES + 1)
#define PCI_BRIDGE_PREF_MEM_WINDOW (PCI_BRIDGE_RESOURCES + 2)
/* CardBus bridge windows */
#define PCI_CB_BRIDGE_IO_0_WINDOW (PCI_BRIDGE_RESOURCES + 0)
#define PCI_CB_BRIDGE_IO_1_WINDOW (PCI_BRIDGE_RESOURCES + 1)
#define PCI_CB_BRIDGE_MEM_0_WINDOW (PCI_BRIDGE_RESOURCES + 2)
#define PCI_CB_BRIDGE_MEM_1_WINDOW (PCI_BRIDGE_RESOURCES + 3)
/* Total number of bridge resources for P2P and CardBus */
#define PCI_BRIDGE_RESOURCE_NUM 4
/* Resources assigned to buses behind the bridge */
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 = PCI_NUM_RESOURCES,
};
/**
* enum pci_interrupt_pin - PCI INTx interrupt values
* @PCI_INTERRUPT_UNKNOWN: Unknown or unassigned interrupt
* @PCI_INTERRUPT_INTA: PCI INTA pin
* @PCI_INTERRUPT_INTB: PCI INTB pin
* @PCI_INTERRUPT_INTC: PCI INTC pin
* @PCI_INTERRUPT_INTD: PCI INTD pin
*
* Corresponds to values for legacy PCI INTx interrupts, as can be found in the
* PCI_INTERRUPT_PIN register.
*/
enum pci_interrupt_pin {
PCI_INTERRUPT_UNKNOWN,
PCI_INTERRUPT_INTA,
PCI_INTERRUPT_INTB,
PCI_INTERRUPT_INTC,
PCI_INTERRUPT_INTD,
};
/* The number of legacy PCI INTx interrupts */
#define PCI_NUM_INTX 4
/*
* pci_power_t values must match the bits in the Capabilities PME_Support
* and Control/Status PowerState fields in the Power Management capability.
*/
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 + (__force int) state];
}
/**
* typedef pci_channel_state_t
*
* 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 {
/* 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 PCIe device */
pcie_warm_reset = (__force pcie_reset_state_t) 2,
/* Use PCIe 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 too */
PCI_DEV_FLAGS_MSI_INTX_DISABLE_BUG = (__force pci_dev_flags_t) (1 << 0),
/* Device configuration is irrevocably lost if disabled into D3 */
PCI_DEV_FLAGS_NO_D3 = (__force pci_dev_flags_t) (1 << 1),
/* Provide indication device is assigned by a Virtual Machine Manager */
PCI_DEV_FLAGS_ASSIGNED = (__force pci_dev_flags_t) (1 << 2),
/* Flag for quirk use to store if quirk-specific ACS is enabled */
PCI_DEV_FLAGS_ACS_ENABLED_QUIRK = (__force pci_dev_flags_t) (1 << 3),
/* Use a PCIe-to-PCI bridge alias even if !pci_is_pcie */
PCI_DEV_FLAG_PCIE_BRIDGE_ALIAS = (__force pci_dev_flags_t) (1 << 5),
/* Do not use bus resets for device */
PCI_DEV_FLAGS_NO_BUS_RESET = (__force pci_dev_flags_t) (1 << 6),
/* Do not use PM reset even if device advertises NoSoftRst- */
PCI_DEV_FLAGS_NO_PM_RESET = (__force pci_dev_flags_t) (1 << 7),
/* Get VPD from function 0 VPD */
PCI_DEV_FLAGS_VPD_REF_F0 = (__force pci_dev_flags_t) (1 << 8),
/* A non-root bridge where translation occurs, stop alias search here */
PCI_DEV_FLAGS_BRIDGE_XLATE_ROOT = (__force pci_dev_flags_t) (1 << 9),
/* Do not use FLR even if device advertises PCI_AF_CAP */
PCI_DEV_FLAGS_NO_FLR_RESET = (__force pci_dev_flags_t) (1 << 10),
/* Don't use Relaxed Ordering for TLPs directed at this device */
PCI_DEV_FLAGS_NO_RELAXED_ORDERING = (__force pci_dev_flags_t) (1 << 11),
};
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,
PCI_BUS_FLAGS_NO_AERSID = (__force pci_bus_flags_t) 4,
PCI_BUS_FLAGS_NO_EXTCFG = (__force pci_bus_flags_t) 8,
};
/* Values from Link Status register, PCIe r3.1, sec 7.8.8 */
enum pcie_link_width {
PCIE_LNK_WIDTH_RESRV = 0x00,
PCIE_LNK_X1 = 0x01,
PCIE_LNK_X2 = 0x02,
PCIE_LNK_X4 = 0x04,
PCIE_LNK_X8 = 0x08,
PCIE_LNK_X12 = 0x0c,
PCIE_LNK_X16 = 0x10,
PCIE_LNK_X32 = 0x20,
PCIE_LNK_WIDTH_UNKNOWN = 0xff,
};
/* See matching string table in pci_speed_string() */
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,
AGP_UNKNOWN = 0x0c,
AGP_1X = 0x0d,
AGP_2X = 0x0e,
AGP_4X = 0x0f,
AGP_8X = 0x10,
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,
PCIE_SPEED_8_0GT = 0x16,
PCIE_SPEED_16_0GT = 0x17,
PCIE_SPEED_32_0GT = 0x18,
PCIE_SPEED_64_0GT = 0x19,
PCI_SPEED_UNKNOWN = 0xff,
};
enum pci_bus_speed pcie_get_speed_cap(struct pci_dev *dev);
enum pcie_link_width pcie_get_width_cap(struct pci_dev *dev);
struct pci_cap_saved_data {
u16 cap_nr;
bool cap_extended;
unsigned int size;
u32 data[];
};
struct pci_cap_saved_state {
struct hlist_node next;
struct pci_cap_saved_data cap;
};
struct irq_affinity;
struct pcie_link_state;
struct pci_vpd;
struct pci_sriov;
struct pci_p2pdma;
struct rcec_ea;
/* The pci_dev structure describes 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) */
#ifdef CONFIG_PCIEAER
u16 aer_cap; /* AER capability offset */
struct aer_stats *aer_stats; /* AER stats for this device */
#endif
#ifdef CONFIG_PCIEPORTBUS
struct rcec_ea *rcec_ea; /* RCEC cached endpoint association */
struct pci_dev *rcec; /* Associated RCEC device */
#endif
u32 devcap; /* PCIe Device Capabilities */
u8 pcie_cap; /* PCIe capability offset */
u8 msi_cap; /* MSI capability offset */
u8 msix_cap; /* MSI-X capability offset */
u8 pcie_mpss:3; /* PCIe Max Payload Size Supported */
u8 rom_base_reg; /* Config register controlling ROM */
u8 pin; /* Interrupt pin this device uses */
u16 pcie_flags_reg; /* Cached PCIe Capabilities Register */
unsigned long *dma_alias_mask;/* Mask of enabled devfn aliases */
struct pci_driver *driver; /* Driver bound to 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,
this is D0-D3, D0 being fully
functional, and D3 being off. */
unsigned int imm_ready:1; /* Supports Immediate Readiness */
u8 pm_cap; /* PM capability offset */
unsigned int pme_support:5; /* Bitmask of states from which PME#
can be generated */
unsigned int pme_poll:1; /* Poll device's PME status bit */
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; /* D1 and D2 are forbidden */
unsigned int no_d3cold:1; /* D3cold is forbidden */
unsigned int bridge_d3:1; /* Allow D3 for bridge */
unsigned int d3cold_allowed:1; /* D3cold is allowed by user */
unsigned int mmio_always_on:1; /* Disallow turning off io/mem
decoding during BAR sizing */
unsigned int wakeup_prepared:1;
unsigned int runtime_d3cold:1; /* Whether go through runtime
D3cold, not set for devices
powered on/off by the
corresponding bridge */
unsigned int skip_bus_pm:1; /* Internal: Skip bus-level PM */
unsigned int ignore_hotplug:1; /* Ignore hotplug events */
unsigned int hotplug_user_indicators:1; /* SlotCtl indicators
controlled exclusively by
user sysfs */
unsigned int clear_retrain_link:1; /* Need to clear Retrain Link
bit manually */
unsigned int d3hot_delay; /* D3hot->D0 transition time in ms */
unsigned int d3cold_delay; /* D3cold->D0 transition time in ms */
#ifdef CONFIG_PCIEASPM
struct pcie_link_state *link_state; /* ASPM link state */
unsigned int ltr_path:1; /* Latency Tolerance Reporting
supported from root to here */
u16 l1ss; /* L1SS Capability pointer */
#endif
unsigned int eetlp_prefix_path:1; /* End-to-End TLP Prefix */
pci_channel_state_t error_state; /* Current connectivity state */
struct device dev; /* Generic device interface */
int cfg_size; /* Size of config 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 */
bool match_driver; /* Skip attaching driver */
unsigned int transparent:1; /* Subtractive decode bridge */
unsigned int io_window:1; /* Bridge has I/O window */
unsigned int pref_window:1; /* Bridge has pref mem window */
unsigned int pref_64_window:1; /* Pref mem window is 64-bit */
unsigned int multifunction:1; /* Multi-function device */
unsigned int is_busmaster:1; /* Is busmaster */
unsigned int no_msi:1; /* May not use MSI */
unsigned int no_64bit_msi:1; /* May only use 32-bit MSIs */
unsigned int block_cfg_access:1; /* Config space access blocked */
unsigned int broken_parity_status:1; /* Generates false positive parity */
unsigned int irq_reroute_variant:2; /* Needs IRQ rerouting variant */
unsigned int msi_enabled:1;
unsigned int msix_enabled:1;
unsigned int ari_enabled:1; /* ARI forwarding */
unsigned int ats_enabled:1; /* Address Translation Svc */
unsigned int pasid_enabled:1; /* Process Address Space ID */
unsigned int pri_enabled:1; /* Page Request Interface */
unsigned int is_managed:1;
unsigned int needs_freset:1; /* 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 shpc_managed:1; /* SHPC owned by shpchp */
unsigned int is_thunderbolt:1; /* Thunderbolt controller */
/*
* Devices marked being untrusted are the ones that can potentially
* execute DMA attacks and similar. They are typically connected
* through external ports such as Thunderbolt but not limited to
* that. When an IOMMU is enabled they should be getting full
* mappings to make sure they cannot access arbitrary memory.
*/
unsigned int untrusted:1;
/*
* Info from the platform, e.g., ACPI or device tree, may mark a
* device as "external-facing". An external-facing device is
* itself internal but devices downstream from it are external.
*/
unsigned int external_facing:1;
unsigned int broken_intx_masking:1; /* INTx masking can't be used */
unsigned int io_window_1k:1; /* Intel bridge 1K I/O windows */
unsigned int irq_managed:1;
unsigned int non_compliant_bars:1; /* Broken BARs; ignore them */
unsigned int is_probed:1; /* Device probing in progress */
unsigned int link_active_reporting:1;/* Device capable of reporting link active */
unsigned int no_vf_scan:1; /* Don't scan for VFs after IOV enablement */
unsigned int no_command_memory:1; /* No PCI_COMMAND_MEMORY */
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;
int rom_attr_enabled; /* Display of ROM attribute 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_HOTPLUG_PCI_PCIE
unsigned int broken_cmd_compl:1; /* No compl for some cmds */
#endif
#ifdef CONFIG_PCIE_PTM
unsigned int ptm_root:1;
unsigned int ptm_enabled:1;
u8 ptm_granularity;
#endif
#ifdef CONFIG_PCI_MSI
const struct attribute_group **msi_irq_groups;
#endif
struct pci_vpd *vpd;
#ifdef CONFIG_PCIE_DPC
u16 dpc_cap;
unsigned int dpc_rp_extensions:1;
u8 dpc_rp_log_size;
#endif
#ifdef CONFIG_PCI_ATS
union {
struct pci_sriov *sriov; /* PF: SR-IOV info */
struct pci_dev *physfn; /* VF: related PF */
};
u16 ats_cap; /* ATS Capability offset */
u8 ats_stu; /* ATS Smallest Translation Unit */
#endif
#ifdef CONFIG_PCI_PRI
u16 pri_cap; /* PRI Capability offset */
u32 pri_reqs_alloc; /* Number of PRI requests allocated */
unsigned int pasid_required:1; /* PRG Response PASID Required */
#endif
#ifdef CONFIG_PCI_PASID
u16 pasid_cap; /* PASID Capability offset */
u16 pasid_features;
#endif
#ifdef CONFIG_PCI_P2PDMA
struct pci_p2pdma __rcu *p2pdma;
#endif
u16 acs_cap; /* ACS Capability offset */
phys_addr_t rom; /* Physical address if not from BAR */
size_t romlen; /* Length if not from BAR */
char *driver_override; /* Driver name to force a match */
unsigned long priv_flags; /* Private flags for the PCI driver */
};
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;
}
struct pci_dev *pci_alloc_dev(struct pci_bus *bus);
#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);
}
struct pci_host_bridge {
struct device dev;
struct pci_bus *bus; /* Root bus */
struct pci_ops *ops;
struct pci_ops *child_ops;
void *sysdata;
int busnr;
struct list_head windows; /* resource_entry */
struct list_head dma_ranges; /* dma ranges resource list */
u8 (*swizzle_irq)(struct pci_dev *, u8 *); /* Platform IRQ swizzler */
int (*map_irq)(const struct pci_dev *, u8, u8);
void (*release_fn)(struct pci_host_bridge *);
void *release_data;
unsigned int ignore_reset_delay:1; /* For entire hierarchy */
unsigned int no_ext_tags:1; /* No Extended Tags */
unsigned int native_aer:1; /* OS may use PCIe AER */
unsigned int native_pcie_hotplug:1; /* OS may use PCIe hotplug */
unsigned int native_shpc_hotplug:1; /* OS may use SHPC hotplug */
unsigned int native_pme:1; /* OS may use PCIe PME */
unsigned int native_ltr:1; /* OS may use PCIe LTR */
unsigned int native_dpc:1; /* OS may use PCIe DPC */
unsigned int preserve_config:1; /* Preserve FW resource setup */
unsigned int size_windows:1; /* Enable root bus sizing */
unsigned int msi_domain:1; /* Bridge wants MSI domain */
/* Resource alignment requirements */
resource_size_t (*align_resource)(struct pci_dev *dev,
const struct resource *res,
resource_size_t start,
resource_size_t size,
resource_size_t align);
unsigned long private[] ____cacheline_aligned;
};
#define to_pci_host_bridge(n) container_of(n, struct pci_host_bridge, dev)
static inline void *pci_host_bridge_priv(struct pci_host_bridge *bridge)
{
return (void *)bridge->private;
}
static inline struct pci_host_bridge *pci_host_bridge_from_priv(void *priv)
{
return container_of(priv, struct pci_host_bridge, private);
}
struct pci_host_bridge *pci_alloc_host_bridge(size_t priv);
struct pci_host_bridge *devm_pci_alloc_host_bridge(struct device *dev,
size_t priv);
void pci_free_host_bridge(struct pci_host_bridge *bridge);
struct pci_host_bridge *pci_find_host_bridge(struct pci_bus *bus);
void pci_set_host_bridge_release(struct pci_host_bridge *bridge,
void (*release_fn)(struct pci_host_bridge *),
void *release_data);
int pcibios_root_bridge_prepare(struct pci_host_bridge *bridge);
/*
* 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;
};
#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;
protected by pci_slot_mutex */
struct resource *resource[PCI_BRIDGE_RESOURCE_NUM];
struct list_head resources; /* Address space routed to this bus */
struct resource busn_res; /* Bus numbers 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 max_bus_speed; /* enum pci_bus_speed */
unsigned char cur_bus_speed; /* enum pci_bus_speed */
#ifdef CONFIG_PCI_DOMAINS_GENERIC
int domain_nr;
#endif
char name[48];
unsigned short bridge_ctl; /* Manage NO_ISA/FBB/et al behaviors */
pci_bus_flags_t bus_flags; /* Inherited by child buses */
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 to_pci_bus(n) container_of(n, struct pci_bus, dev)
static inline u16 pci_dev_id(struct pci_dev *dev)
{
return PCI_DEVID(dev->bus->number, dev->devfn);
}
/*
* Returns true if the PCI bus is root (behind host-PCI bridge),
* false otherwise
*
* Some code assumes that "bus->self == NULL" means that bus is a root bus.
* This is incorrect because "virtual" buses added for SR-IOV (via
* virtfn_add_bus()) have "bus->self == NULL" but are not root buses.
*/
static inline bool pci_is_root_bus(struct pci_bus *pbus)
{
return !(pbus->parent);
}
/**
* pci_is_bridge - check if the PCI device is a bridge
* @dev: PCI device
*
* Return true if the PCI device is bridge whether it has subordinate
* or not.
*/
static inline bool pci_is_bridge(struct pci_dev *dev)
{
return dev->hdr_type == PCI_HEADER_TYPE_BRIDGE ||
dev->hdr_type == PCI_HEADER_TYPE_CARDBUS;
}
#define for_each_pci_bridge(dev, bus) \
list_for_each_entry(dev, &bus->devices, bus_list) \
if (!pci_is_bridge(dev)) {} else
static inline struct pci_dev *pci_upstream_bridge(struct pci_dev *dev)
{
dev = pci_physfn(dev);
if (pci_is_root_bus(dev->bus))
return NULL;
return dev->bus->self;
}
#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
/* Translate above to generic errno for passing back through non-PCI code */
static inline int pcibios_err_to_errno(int err)
{
if (err <= PCIBIOS_SUCCESSFUL)
return err; /* Assume already errno */
switch (err) {
case PCIBIOS_FUNC_NOT_SUPPORTED:
return -ENOENT;
case PCIBIOS_BAD_VENDOR_ID:
return -ENOTTY;
case PCIBIOS_DEVICE_NOT_FOUND:
return -ENODEV;
case PCIBIOS_BAD_REGISTER_NUMBER:
return -EFAULT;
case PCIBIOS_SET_FAILED:
return -EIO;
case PCIBIOS_BUFFER_TOO_SMALL:
return -ENOSPC;
}
return -ERANGE;
}
/* Low-level architecture-dependent routines */
struct pci_ops {
int (*add_bus)(struct pci_bus *bus);
void (*remove_bus)(struct pci_bus *bus);
void __iomem *(*map_bus)(struct pci_bus *bus, unsigned int devfn, int where);
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.
*/
int raw_pci_read(unsigned int domain, unsigned int bus, unsigned int devfn,
int reg, int len, u32 *val);
int raw_pci_write(unsigned int domain, unsigned int bus, unsigned int devfn,
int reg, int len, u32 val);
#ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT
typedef u64 pci_bus_addr_t;
#else
typedef u32 pci_bus_addr_t;
#endif
struct pci_bus_region {
pci_bus_addr_t start;
pci_bus_addr_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, 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,
/* No AER capabilities registered for the driver */
PCI_ERS_RESULT_NO_AER_DRIVER = (__force pci_ers_result_t) 6,
};
/* 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,
pci_channel_state_t error);
/* MMIO has been re-enabled, but not DMA */
pci_ers_result_t (*mmio_enabled)(struct pci_dev *dev);
/* PCI slot has been reset */
pci_ers_result_t (*slot_reset)(struct pci_dev *dev);
/* PCI function reset prepare or completed */
void (*reset_prepare)(struct pci_dev *dev);
void (*reset_done)(struct pci_dev *dev);
/* Device driver may resume normal operations */
void (*resume)(struct pci_dev *dev);
};
struct module;
/**
* struct pci_driver - PCI driver structure
* @node: List of driver structures.
* @name: Driver name.
* @id_table: Pointer to table of device IDs the driver is
* interested in. Most drivers should export this
* table using MODULE_DEVICE_TABLE(pci,...).
* @probe: This probing function gets called (during execution
* of pci_register_driver() for already existing
* devices or later if a new device gets inserted) for
* all PCI devices which match the ID table and are not
* "owned" by the other drivers yet. This function gets
* passed a "struct pci_dev \*" for each device whose
* entry in the ID table matches the device. The probe
* function returns zero when the driver chooses to
* take "ownership" of the device or an error code
* (negative number) otherwise.
* The probe function always gets called from process
* context, so it can sleep.
* @remove: The remove() function gets called whenever a device
* being handled by this driver is removed (either during
* deregistration of the driver or when it's manually
* pulled out of a hot-pluggable slot).
* The remove function always gets called from process
* context, so it can sleep.
* @suspend: Put device into low power state.
* @resume: Wake device from low power state.
* (Please see Documentation/power/pci.rst for descriptions
* of PCI Power Management and the related functions.)
* @shutdown: Hook into reboot_notifier_list (kernel/sys.c).
* Intended to stop any idling DMA operations.
* Useful for enabling wake-on-lan (NIC) or changing
* the power state of a device before reboot.
* e.g. drivers/net/e100.c.
* @sriov_configure: Optional driver callback to allow configuration of
* number of VFs to enable via sysfs "sriov_numvfs" file.
* @sriov_set_msix_vec_count: PF Driver callback to change number of MSI-X
* vectors on a VF. Triggered via sysfs "sriov_vf_msix_count".
* This will change MSI-X Table Size in the VF Message Control
* registers.
* @sriov_get_vf_total_msix: PF driver callback to get the total number of
* MSI-X vectors available for distribution to the VFs.
* @err_handler: See Documentation/PCI/pci-error-recovery.rst
* @groups: Sysfs attribute groups.
* @dev_groups: Attributes attached to the device that will be
* created once it is bound to the driver.
* @driver: Driver model structure.
* @dynids: List of dynamically added device IDs.
*/
struct pci_driver {
struct list_head node;
const 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 (*resume)(struct pci_dev *dev); /* Device woken up */
void (*shutdown)(struct pci_dev *dev);
int (*sriov_configure)(struct pci_dev *dev, int num_vfs); /* On PF */
int (*sriov_set_msix_vec_count)(struct pci_dev *vf, int msix_vec_count); /* On PF */
u32 (*sriov_get_vf_total_msix)(struct pci_dev *pf);
const struct pci_error_handlers *err_handler;
const struct attribute_group **groups;
const struct attribute_group **dev_groups;
struct device_driver driver;
struct pci_dynids dynids;
};
#define to_pci_driver(drv) container_of(drv, struct pci_driver, driver)
/**
* 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_SUB - macro used to describe a specific PCI device with subsystem
* @vend: the 16 bit PCI Vendor ID
* @dev: the 16 bit PCI Device ID
* @subvend: the 16 bit PCI Subvendor ID
* @subdev: the 16 bit PCI Subdevice ID
*
* This macro is used to create a struct pci_device_id that matches a
* specific device with subsystem information.
*/
#define PCI_DEVICE_SUB(vend, dev, subvend, subdev) \
.vendor = (vend), .device = (dev), \
.subvendor = (subvend), .subdevice = (subdev)
/**
* 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
* @vend: the vendor name
* @dev: 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(vend, dev) \
.vendor = PCI_VENDOR_ID_##vend, .device = (dev), \
.subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID, 0, 0
/**
* PCI_DEVICE_DATA - macro used to describe a specific PCI device in very short form
* @vend: the vendor name (without PCI_VENDOR_ID_ prefix)
* @dev: the device name (without PCI_DEVICE_ID_<vend>_ prefix)
* @data: the driver data to be filled
*
* 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.
*/
#define PCI_DEVICE_DATA(vend, dev, data) \
.vendor = PCI_VENDOR_ID_##vend, .device = PCI_DEVICE_ID_##vend##_##dev, \
.subvendor = PCI_ANY_ID, .subdevice = PCI_ANY_ID, 0, 0, \
.driver_data = (kernel_ulong_t)(data)
enum {
PCI_REASSIGN_ALL_RSRC = 0x00000001, /* Ignore firmware setup */
PCI_REASSIGN_ALL_BUS = 0x00000002, /* Reassign all bus numbers */
PCI_PROBE_ONLY = 0x00000004, /* Use existing setup */
PCI_CAN_SKIP_ISA_ALIGN = 0x00000008, /* Don't do ISA alignment */
PCI_ENABLE_PROC_DOMAINS = 0x00000010, /* Enable domains in /proc */
PCI_COMPAT_DOMAIN_0 = 0x00000020, /* ... except domain 0 */
PCI_SCAN_ALL_PCIE_DEVS = 0x00000040, /* Scan all, not just dev 0 */
};
#define PCI_IRQ_LEGACY (1 << 0) /* Allow legacy interrupts */
#define PCI_IRQ_MSI (1 << 1) /* Allow MSI interrupts */
#define PCI_IRQ_MSIX (1 << 2) /* Allow MSI-X interrupts */
#define PCI_IRQ_AFFINITY (1 << 3) /* Auto-assign affinity */
/* These external functions are only available when PCI support is enabled */
#ifdef CONFIG_PCI
extern unsigned int pci_flags;
static inline void pci_set_flags(int flags) { pci_flags = flags; }
static inline void pci_add_flags(int flags) { pci_flags |= flags; }
static inline void pci_clear_flags(int flags) { pci_flags &= ~flags; }
static inline int pci_has_flag(int flag) { return pci_flags & flag; }
void pcie_bus_configure_settings(struct pci_bus *bus);
enum pcie_bus_config_types {
PCIE_BUS_TUNE_OFF, /* Don't touch MPS at all */
PCIE_BUS_DEFAULT, /* Ensure MPS matches upstream bridge */
PCIE_BUS_SAFE, /* Use largest MPS boot-time devices support */
PCIE_BUS_PERFORMANCE, /* Use MPS and MRRS for best performance */
PCIE_BUS_PEER2PEER, /* Set MPS = 128 for all devices */
};
extern enum pcie_bus_config_types pcie_bus_config;
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 */
int no_pci_devices(void);
void pcibios_resource_survey_bus(struct pci_bus *bus);
void pcibios_bus_add_device(struct pci_dev *pdev);
void pcibios_add_bus(struct pci_bus *bus);
void pcibios_remove_bus(struct pci_bus *bus);
void pcibios_fixup_bus(struct pci_bus *);
int __must_check pcibios_enable_device(struct pci_dev *, int mask);
/* Architecture-specific versions may override this (weak) */
char *pcibios_setup(char *str);
/* Used only when drivers/pci/setup.c is used */
resource_size_t pcibios_align_resource(void *, const struct resource *,
resource_size_t,
resource_size_t);
/* Weak but can be overridden by arch */
void pci_fixup_cardbus(struct pci_bus *);
/* Generic PCI functions used internally */
void pcibios_resource_to_bus(struct pci_bus *bus, struct pci_bus_region *region,
struct resource *res);
void pcibios_bus_to_resource(struct pci_bus *bus, struct resource *res,
struct pci_bus_region *region);
void pcibios_scan_specific_bus(int busn);
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(int bus, struct pci_ops *ops, void *sysdata);
struct pci_bus *pci_create_root_bus(struct device *parent, int bus,
struct pci_ops *ops, void *sysdata,
struct list_head *resources);
int pci_host_probe(struct pci_host_bridge *bridge);
int pci_bus_insert_busn_res(struct pci_bus *b, int bus, int busmax);
int pci_bus_update_busn_res_end(struct pci_bus *b, int busmax);
void pci_bus_release_busn_res(struct pci_bus *b);
struct pci_bus *pci_scan_root_bus(struct device *parent, int bus,
struct pci_ops *ops, void *sysdata,
struct list_head *resources);
int pci_scan_root_bus_bridge(struct pci_host_bridge *bridge);
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);
#ifdef CONFIG_SYSFS
void pci_dev_assign_slot(struct pci_dev *dev);
#else
static inline void pci_dev_assign_slot(struct pci_dev *dev) { }
#endif
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);
void 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(const 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);
struct pci_dev *pci_dev_get(struct pci_dev *dev);
void pci_dev_put(struct pci_dev *dev);
void pci_remove_bus(struct pci_bus *b);
void pci_stop_and_remove_bus_device(struct pci_dev *dev);
void pci_stop_and_remove_bus_device_locked(struct pci_dev *dev);
void pci_stop_root_bus(struct pci_bus *bus);
void pci_remove_root_bus(struct pci_bus *bus);
void pci_setup_cardbus(struct pci_bus *bus);
void pcibios_setup_bridge(struct pci_bus *bus, unsigned long type);
void pci_sort_breadthfirst(void);
#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))
/* Generic PCI functions exported to card drivers */
u8 pci_bus_find_capability(struct pci_bus *bus, unsigned int devfn, int cap);
u8 pci_find_capability(struct pci_dev *dev, int cap);
u8 pci_find_next_capability(struct pci_dev *dev, u8 pos, int cap);
u8 pci_find_ht_capability(struct pci_dev *dev, int ht_cap);
u8 pci_find_next_ht_capability(struct pci_dev *dev, u8 pos, int ht_cap);
u16 pci_find_ext_capability(struct pci_dev *dev, int cap);
u16 pci_find_next_ext_capability(struct pci_dev *dev, u16 pos, int cap);
struct pci_bus *pci_find_next_bus(const struct pci_bus *from);
u16 pci_find_vsec_capability(struct pci_dev *dev, u16 vendor, int cap);
u64 pci_get_dsn(struct pci_dev *dev);
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);
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);
int pci_generic_config_read(struct pci_bus *bus, unsigned int devfn,
int where, int size, u32 *val);
int pci_generic_config_write(struct pci_bus *bus, unsigned int devfn,
int where, int size, u32 val);
int pci_generic_config_read32(struct pci_bus *bus, unsigned int devfn,
int where, int size, u32 *val);
int pci_generic_config_write32(struct pci_bus *bus, unsigned int devfn,
int where, int size, u32 val);
struct pci_ops *pci_bus_set_ops(struct pci_bus *bus, struct pci_ops *ops);
int pci_read_config_byte(const struct pci_dev *dev, int where, u8 *val);
int pci_read_config_word(const struct pci_dev *dev, int where, u16 *val);
int pci_read_config_dword(const struct pci_dev *dev, int where, u32 *val);
int pci_write_config_byte(const struct pci_dev *dev, int where, u8 val);
int pci_write_config_word(const struct pci_dev *dev, int where, u16 val);
int pci_write_config_dword(const struct pci_dev *dev, int where, u32 val);
int pcie_capability_read_word(struct pci_dev *dev, int pos, u16 *val);
int pcie_capability_read_dword(struct pci_dev *dev, int pos, u32 *val);
int pcie_capability_write_word(struct pci_dev *dev, int pos, u16 val);
int pcie_capability_write_dword(struct pci_dev *dev, int pos, u32 val);
int pcie_capability_clear_and_set_word(struct pci_dev *dev, int pos,
u16 clear, u16 set);
int pcie_capability_clear_and_set_dword(struct pci_dev *dev, int pos,
u32 clear, u32 set);
static inline int pcie_capability_set_word(struct pci_dev *dev, int pos,
u16 set)
{
return pcie_capability_clear_and_set_word(dev, pos, 0, set);
}
static inline int pcie_capability_set_dword(struct pci_dev *dev, int pos,
u32 set)
{
return pcie_capability_clear_and_set_dword(dev, pos, 0, set);
}
static inline int pcie_capability_clear_word(struct pci_dev *dev, int pos,
u16 clear)
{
return pcie_capability_clear_and_set_word(dev, pos, clear, 0);
}
static inline int pcie_capability_clear_dword(struct pci_dev *dev, int pos,
u32 clear)
{
return pcie_capability_clear_and_set_dword(dev, pos, clear, 0);
}
/* User-space driven config access */
int pci_user_read_config_byte(struct pci_dev *dev, int where, u8 *val);
int pci_user_read_config_word(struct pci_dev *dev, int where, u16 *val);
int pci_user_read_config_dword(struct pci_dev *dev, int where, u32 *val);
int pci_user_write_config_byte(struct pci_dev *dev, int where, u8 val);
int pci_user_write_config_word(struct pci_dev *dev, int where, u16 val);
int pci_user_write_config_dword(struct pci_dev *dev, int where, u32 val);
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 bool pci_intx_mask_supported(struct pci_dev *pdev)
{
/*
* INTx masking is supported if PCI_COMMAND_INTX_DISABLE is
* writable and no quirk has marked the feature broken.
*/
return !pdev->broken_intx_masking;
}
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);
extern unsigned int pcibios_max_latency;
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);
int __must_check pci_set_mwi(struct pci_dev *dev);
int __must_check pcim_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_disable_parity(struct pci_dev *dev);
void pci_intx(struct pci_dev *dev, int enable);
bool pci_check_and_mask_intx(struct pci_dev *dev);
bool pci_check_and_unmask_intx(struct pci_dev *dev);
int pci_wait_for_pending(struct pci_dev *dev, int pos, u16 mask);
int pci_wait_for_pending_transaction(struct pci_dev *dev);
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 pcie_get_mps(struct pci_dev *dev);
int pcie_set_mps(struct pci_dev *dev, int mps);
u32 pcie_bandwidth_available(struct pci_dev *dev, struct pci_dev **limiting_dev,
enum pci_bus_speed *speed,
enum pcie_link_width *width);
void pcie_print_link_status(struct pci_dev *dev);
bool pcie_has_flr(struct pci_dev *dev);
int pcie_flr(struct pci_dev *dev);
int __pci_reset_function_locked(struct pci_dev *dev);
int pci_reset_function(struct pci_dev *dev);
int pci_reset_function_locked(struct pci_dev *dev);
int pci_try_reset_function(struct pci_dev *dev);
int pci_probe_reset_slot(struct pci_slot *slot);
int pci_probe_reset_bus(struct pci_bus *bus);
int pci_reset_bus(struct pci_dev *dev);
void pci_reset_secondary_bus(struct pci_dev *dev);
void pcibios_reset_secondary_bus(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 __must_check pci_reassign_resource(struct pci_dev *dev, int i, resource_size_t add_size, resource_size_t align);
void pci_release_resource(struct pci_dev *dev, int resno);
static inline int pci_rebar_bytes_to_size(u64 bytes)
{
bytes = roundup_pow_of_two(bytes);
/* Return BAR size as defined in the resizable BAR specification */
return max(ilog2(bytes), 20) - 20;
}
u32 pci_rebar_get_possible_sizes(struct pci_dev *pdev, int bar);
int __must_check pci_resize_resource(struct pci_dev *dev, int i, int size);
int pci_select_bars(struct pci_dev *dev, unsigned long flags);
bool pci_device_is_present(struct pci_dev *pdev);
void pci_ignore_hotplug(struct pci_dev *dev);
struct pci_dev *pci_real_dma_dev(struct pci_dev *dev);
int pci_status_get_and_clear_errors(struct pci_dev *pdev);
int __printf(6, 7) pci_request_irq(struct pci_dev *dev, unsigned int nr,
irq_handler_t handler, irq_handler_t thread_fn, void *dev_id,
const char *fmt, ...);
void pci_free_irq(struct pci_dev *dev, unsigned int nr, void *dev_id);
/* 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);
/* Power management related routines */
int pci_save_state(struct pci_dev *dev);
void pci_restore_state(struct pci_dev *dev);
struct pci_saved_state *pci_store_saved_state(struct pci_dev *dev);
int pci_load_saved_state(struct pci_dev *dev,
struct pci_saved_state *state);
int pci_load_and_free_saved_state(struct pci_dev *dev,
struct pci_saved_state **state);
struct pci_cap_saved_state *pci_find_saved_cap(struct pci_dev *dev, char cap);
struct pci_cap_saved_state *pci_find_saved_ext_cap(struct pci_dev *dev,
u16 cap);
int pci_add_cap_save_buffer(struct pci_dev *dev, char cap, unsigned int size);
int pci_add_ext_cap_save_buffer(struct pci_dev *dev,
u16 cap, unsigned int size);
int pci_platform_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);
int pci_prepare_to_sleep(struct pci_dev *dev);
int pci_back_from_sleep(struct pci_dev *dev);
bool pci_dev_run_wake(struct pci_dev *dev);
void pci_d3cold_enable(struct pci_dev *dev);
void pci_d3cold_disable(struct pci_dev *dev);
bool pcie_relaxed_ordering_enabled(struct pci_dev *dev);
void pci_resume_bus(struct pci_bus *bus);
void pci_bus_set_current_state(struct pci_bus *bus, pci_power_t state);
/* 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 */
unsigned int pci_rescan_bus_bridge_resize(struct pci_dev *bridge);
unsigned int pci_rescan_bus(struct pci_bus *bus);
void pci_lock_rescan_remove(void);
void pci_unlock_rescan_remove(void);
/* 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);
/* Helper functions for low-level code (drivers/pci/setup-[bus,res].c) */
resource_size_t pcibios_retrieve_fw_addr(struct pci_dev *dev, int idx);
void pci_bus_assign_resources(const struct pci_bus *bus);
void pci_bus_claim_resources(struct pci_bus *bus);
void pci_bus_size_bridges(struct pci_bus *bus);
int pci_claim_resource(struct pci_dev *, int);
int pci_claim_bridge_resource(struct pci_dev *bridge, int i);
void pci_assign_unassigned_resources(void);
void pci_assign_unassigned_bridge_resources(struct pci_dev *bridge);
void pci_assign_unassigned_bus_resources(struct pci_bus *bus);
void pci_assign_unassigned_root_bus_resources(struct pci_bus *bus);
int pci_reassign_bridge_resources(struct pci_dev *bridge, unsigned long type);
void pdev_enable_device(struct pci_dev *);
int pci_enable_resources(struct pci_dev *, int mask);
void pci_assign_irq(struct pci_dev *dev);
struct resource *pci_find_resource(struct pci_dev *dev, struct resource *res);
#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 *);
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 */
void pci_add_resource(struct list_head *resources, struct resource *res);
void pci_add_resource_offset(struct list_head *resources, struct resource *res,
resource_size_t offset);
void pci_free_resource_list(struct list_head *resources);
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);
int devm_request_pci_bus_resources(struct device *dev,
struct list_head *resources);
/* Temporary until new and working PCI SBR API in place */
int pci_bridge_secondary_bus_reset(struct pci_dev *dev);
#define pci_bus_for_each_resource(bus, res, i) \
for (i = 0; \
(res = pci_bus_resource_n(bus, i)) || i < PCI_BRIDGE_RESOURCE_NUM; \
i++)
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 long type_mask,
resource_size_t (*alignf)(void *,
const struct resource *,
resource_size_t,
resource_size_t),
void *alignf_data);
int pci_register_io_range(struct fwnode_handle *fwnode, phys_addr_t addr,
resource_size_t size);
unsigned long pci_address_to_pio(phys_addr_t addr);
phys_addr_t pci_pio_to_address(unsigned long pio);
int pci_remap_iospace(const struct resource *res, phys_addr_t phys_addr);
int devm_pci_remap_iospace(struct device *dev, const struct resource *res,
phys_addr_t phys_addr);
void pci_unmap_iospace(struct resource *res);
void __iomem *devm_pci_remap_cfgspace(struct device *dev,
resource_size_t offset,
resource_size_t size);
void __iomem *devm_pci_remap_cfg_resource(struct device *dev,
struct resource *res);
static inline pci_bus_addr_t pci_bus_address(struct pci_dev *pdev, int bar)
{
struct pci_bus_region region;
pcibios_resource_to_bus(pdev->bus, &region, &pdev->resource[bar]);
return region.start;
}
/* 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 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);
/**
* module_pci_driver() - Helper macro for registering a PCI driver
* @__pci_driver: pci_driver struct
*
* Helper macro for PCI drivers which do not do anything special in module
* init/exit. This eliminates a lot of boilerplate. Each module may only
* use this macro once, and calling it replaces module_init() and module_exit()
*/
#define module_pci_driver(__pci_driver) \
module_driver(__pci_driver, pci_register_driver, pci_unregister_driver)
/**
* builtin_pci_driver() - Helper macro for registering a PCI driver
* @__pci_driver: pci_driver struct
*
* Helper macro for PCI drivers which do not do anything special in their
* init code. This eliminates a lot of boilerplate. Each driver may only
* use this macro once, and calling it replaces device_initcall(...)
*/
#define builtin_pci_driver(__pci_driver) \
builtin_driver(__pci_driver, pci_register_driver)
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(struct pci_dev *dev);
unsigned char pci_bus_max_busnr(struct pci_bus *bus);
void pci_setup_bridge(struct pci_bus *bus);
resource_size_t pcibios_window_alignment(struct pci_bus *bus,
unsigned long type);
#define PCI_VGA_STATE_CHANGE_BRIDGE (1 << 0)
#define PCI_VGA_STATE_CHANGE_DECODES (1 << 1)
int pci_set_vga_state(struct pci_dev *pdev, bool decode,
unsigned int command_bits, u32 flags);
/*
* Virtual interrupts allow for more interrupts to be allocated
* than the device has interrupts for. These are not programmed
* into the device's MSI-X table and must be handled by some
* other driver means.
*/
#define PCI_IRQ_VIRTUAL (1 << 4)
#define PCI_IRQ_ALL_TYPES \
(PCI_IRQ_LEGACY | PCI_IRQ_MSI | PCI_IRQ_MSIX)
/* 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_zalloc(pool, flags, handle) \
dma_pool_zalloc(pool, flags, handle)
#define pci_pool_free(pool, vaddr, addr) dma_pool_free(pool, vaddr, addr)
struct msix_entry {
u32 vector; /* Kernel uses to write allocated vector */
u16 entry; /* Driver uses to specify entry, OS writes */
};
#ifdef CONFIG_PCI_MSI
int pci_msi_vec_count(struct pci_dev *dev);
void pci_disable_msi(struct pci_dev *dev);
int pci_msix_vec_count(struct pci_dev *dev);
void pci_disable_msix(struct pci_dev *dev);
void pci_restore_msi_state(struct pci_dev *dev);
int pci_msi_enabled(void);
int pci_enable_msi(struct pci_dev *dev);
int pci_enable_msix_range(struct pci_dev *dev, struct msix_entry *entries,
int minvec, int maxvec);
static inline int pci_enable_msix_exact(struct pci_dev *dev,
struct msix_entry *entries, int nvec)
{
int rc = pci_enable_msix_range(dev, entries, nvec, nvec);
if (rc < 0)
return rc;
return 0;
}
int pci_alloc_irq_vectors_affinity(struct pci_dev *dev, unsigned int min_vecs,
unsigned int max_vecs, unsigned int flags,
struct irq_affinity *affd);
void pci_free_irq_vectors(struct pci_dev *dev);
int pci_irq_vector(struct pci_dev *dev, unsigned int nr);
const struct cpumask *pci_irq_get_affinity(struct pci_dev *pdev, int vec);
#else
static inline int pci_msi_vec_count(struct pci_dev *dev) { return -ENOSYS; }
static inline void pci_disable_msi(struct pci_dev *dev) { }
static inline int pci_msix_vec_count(struct pci_dev *dev) { return -ENOSYS; }
static inline void pci_disable_msix(struct pci_dev *dev) { }
static inline void pci_restore_msi_state(struct pci_dev *dev) { }
static inline int pci_msi_enabled(void) { return 0; }
static inline int pci_enable_msi(struct pci_dev *dev)
{ return -ENOSYS; }
static inline int pci_enable_msix_range(struct pci_dev *dev,
struct msix_entry *entries, int minvec, int maxvec)
{ return -ENOSYS; }
static inline int pci_enable_msix_exact(struct pci_dev *dev,
struct msix_entry *entries, int nvec)
{ return -ENOSYS; }
static inline int
pci_alloc_irq_vectors_affinity(struct pci_dev *dev, unsigned int min_vecs,
unsigned int max_vecs, unsigned int flags,
struct irq_affinity *aff_desc)
{
if ((flags & PCI_IRQ_LEGACY) && min_vecs == 1 && dev->irq)
return 1;
return -ENOSPC;
}
static inline void pci_free_irq_vectors(struct pci_dev *dev)
{
}
static inline int pci_irq_vector(struct pci_dev *dev, unsigned int nr)
{
if (WARN_ON_ONCE(nr > 0))
return -EINVAL;
return dev->irq;
}
static inline const struct cpumask *pci_irq_get_affinity(struct pci_dev *pdev,
int vec)
{
return cpu_possible_mask;
}
#endif
/**
* pci_irqd_intx_xlate() - Translate PCI INTx value to an IRQ domain hwirq
* @d: the INTx IRQ domain
* @node: the DT node for the device whose interrupt we're translating
* @intspec: the interrupt specifier data from the DT
* @intsize: the number of entries in @intspec
* @out_hwirq: pointer at which to write the hwirq number
* @out_type: pointer at which to write the interrupt type
*
* Translate a PCI INTx interrupt number from device tree in the range 1-4, as
* stored in the standard PCI_INTERRUPT_PIN register, to a value in the range
* 0-3 suitable for use in a 4 entry IRQ domain. That is, subtract one from the
* INTx value to obtain the hwirq number.
*
* Returns 0 on success, or -EINVAL if the interrupt specifier is out of range.
*/
static inline int pci_irqd_intx_xlate(struct irq_domain *d,
struct device_node *node,
const u32 *intspec,
unsigned int intsize,
unsigned long *out_hwirq,
unsigned int *out_type)
{
const u32 intx = intspec[0];
if (intx < PCI_INTERRUPT_INTA || intx > PCI_INTERRUPT_INTD)
return -EINVAL;
*out_hwirq = intx - PCI_INTERRUPT_INTA;
return 0;
}
#ifdef CONFIG_PCIEPORTBUS
extern bool pcie_ports_disabled;
extern bool pcie_ports_native;
#else
#define pcie_ports_disabled true
#define pcie_ports_native false
#endif
#define PCIE_LINK_STATE_L0S BIT(0)
#define PCIE_LINK_STATE_L1 BIT(1)
#define PCIE_LINK_STATE_CLKPM BIT(2)
#define PCIE_LINK_STATE_L1_1 BIT(3)
#define PCIE_LINK_STATE_L1_2 BIT(4)
#define PCIE_LINK_STATE_L1_1_PCIPM BIT(5)
#define PCIE_LINK_STATE_L1_2_PCIPM BIT(6)
#ifdef CONFIG_PCIEASPM
int pci_disable_link_state(struct pci_dev *pdev, int state);
int pci_disable_link_state_locked(struct pci_dev *pdev, int state);
void pcie_no_aspm(void);
bool pcie_aspm_support_enabled(void);
bool pcie_aspm_enabled(struct pci_dev *pdev);
#else
static inline int pci_disable_link_state(struct pci_dev *pdev, int state)
{ return 0; }
static inline int pci_disable_link_state_locked(struct pci_dev *pdev, int state)
{ return 0; }
static inline void pcie_no_aspm(void) { }
static inline bool pcie_aspm_support_enabled(void) { return false; }
static inline bool pcie_aspm_enabled(struct pci_dev *pdev) { return false; }
#endif
#ifdef CONFIG_PCIEAER
bool pci_aer_available(void);
#else
static inline bool pci_aer_available(void) { return false; }
#endif
bool pci_ats_disabled(void);
void pci_cfg_access_lock(struct pci_dev *dev);
bool pci_cfg_access_trylock(struct pci_dev *dev);
void pci_cfg_access_unlock(struct pci_dev *dev);
int pci_dev_trylock(struct pci_dev *dev);
void pci_dev_unlock(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 buses 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 */
/*
* Generic implementation for PCI domain support. If your
* architecture does not need custom management of PCI
* domains then this implementation will be used
*/
#ifdef CONFIG_PCI_DOMAINS_GENERIC
static inline int pci_domain_nr(struct pci_bus *bus)
{
return bus->domain_nr;
}
#ifdef CONFIG_ACPI
int acpi_pci_bus_find_domain_nr(struct pci_bus *bus);
#else
static inline int acpi_pci_bus_find_domain_nr(struct pci_bus *bus)
{ return 0; }
#endif
int pci_bus_find_domain_nr(struct pci_bus *bus, struct device *parent);
#endif
/* 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, u32 flags);
void pci_register_set_vga_state(arch_set_vga_state_t func);
static inline int
pci_request_io_regions(struct pci_dev *pdev, const char *name)
{
return pci_request_selected_regions(pdev,
pci_select_bars(pdev, IORESOURCE_IO), name);
}
static inline void
pci_release_io_regions(struct pci_dev *pdev)
{
return pci_release_selected_regions(pdev,
pci_select_bars(pdev, IORESOURCE_IO));
}
static inline int
pci_request_mem_regions(struct pci_dev *pdev, const char *name)
{
return pci_request_selected_regions(pdev,
pci_select_bars(pdev, IORESOURCE_MEM), name);
}
static inline void
pci_release_mem_regions(struct pci_dev *pdev)
{
return pci_release_selected_regions(pdev,
pci_select_bars(pdev, IORESOURCE_MEM));
}
#else /* CONFIG_PCI is not enabled */
static inline void pci_set_flags(int flags) { }
static inline void pci_add_flags(int flags) { }
static inline void pci_clear_flags(int flags) { }
static inline int pci_has_flag(int flag) { return 0; }
/*
* 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_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 pcim_enable_device(struct pci_dev *pdev) { 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 u8 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; }
static inline u64 pci_get_dsn(struct pci_dev *dev)
{ return 0; }
/* Power management related routines */
static inline int pci_save_state(struct pci_dev *dev) { return 0; }
static inline void pci_restore_state(struct pci_dev *dev) { }
static inline int pci_set_power_state(struct pci_dev *dev, pci_power_t state)
{ return 0; }
static inline int pci_wake_from_d3(struct pci_dev *dev, bool enable)
{ 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 struct resource *pci_find_resource(struct pci_dev *dev,
struct resource *res)
{ return NULL; }
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) { }
static inline int pci_register_io_range(struct fwnode_handle *fwnode,
phys_addr_t addr, resource_size_t size)
{ return -EINVAL; }
static inline unsigned long pci_address_to_pio(phys_addr_t addr) { return -1; }
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_domain_bus_and_slot(int domain,
unsigned int bus, unsigned int devfn)
{ return NULL; }
static inline int pci_domain_nr(struct pci_bus *bus) { return 0; }
static inline struct pci_dev *pci_dev_get(struct pci_dev *dev) { return NULL; }
#define dev_is_pci(d) (false)
#define dev_is_pf(d) (false)
static inline bool pci_acs_enabled(struct pci_dev *pdev, u16 acs_flags)
{ return false; }
static inline int pci_irqd_intx_xlate(struct irq_domain *d,
struct device_node *node,
const u32 *intspec,
unsigned int intsize,
unsigned long *out_hwirq,
unsigned int *out_type)
{ return -EINVAL; }
static inline const struct pci_device_id *pci_match_id(const struct pci_device_id *ids,
struct pci_dev *dev)
{ return NULL; }
static inline bool pci_ats_disabled(void) { return true; }
static inline int pci_irq_vector(struct pci_dev *dev, unsigned int nr)
{
return -EINVAL;
}
static inline int
pci_alloc_irq_vectors_affinity(struct pci_dev *dev, unsigned int min_vecs,
unsigned int max_vecs, unsigned int flags,
struct irq_affinity *aff_desc)
{
return -ENOSPC;
}
#endif /* CONFIG_PCI */
static inline int
pci_alloc_irq_vectors(struct pci_dev *dev, unsigned int min_vecs,
unsigned int max_vecs, unsigned int flags)
{
return pci_alloc_irq_vectors_affinity(dev, min_vecs, max_vecs, flags,
NULL);
}
/* Include architecture-dependent settings and functions */
#include <asm/pci.h>
/* These two functions provide almost identical functionality. Depending
* on the architecture, one will be implemented as a wrapper around the
* other (in drivers/pci/mmap.c).
*
* pci_mmap_resource_range() maps a specific BAR, and vm->vm_pgoff
* is expected to be an offset within that region.
*
* pci_mmap_page_range() is the legacy architecture-specific interface,
* which accepts a "user visible" resource address converted by
* pci_resource_to_user(), as used in the legacy mmap() interface in
* /proc/bus/pci/.
*/
int pci_mmap_resource_range(struct pci_dev *dev, int bar,
struct vm_area_struct *vma,
enum pci_mmap_state mmap_state, int write_combine);
int pci_mmap_page_range(struct pci_dev *pdev, int bar,
struct vm_area_struct *vma,
enum pci_mmap_state mmap_state, int write_combine);
#ifndef arch_can_pci_mmap_wc
#define arch_can_pci_mmap_wc() 0
#endif
#ifndef arch_can_pci_mmap_io
#define arch_can_pci_mmap_io() 0
#define pci_iobar_pfn(pdev, bar, vma) (-EINVAL)
#else
int pci_iobar_pfn(struct pci_dev *pdev, int bar, struct vm_area_struct *vma);
#endif
#ifndef pci_root_bus_fwnode
#define pci_root_bus_fwnode(bus) NULL
#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);
}
static inline const char *pci_name(const struct pci_dev *pdev)
{
return dev_name(&pdev->dev);
}
void pci_resource_to_user(const struct pci_dev *dev, int bar,
const struct resource *rsrc,
resource_size_t *start, resource_size_t *end);
/*
* 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; /* Or PCI_ANY_ID */
u16 device; /* Or PCI_ANY_ID */
u32 class; /* Or PCI_ANY_ID */
unsigned int class_shift; /* should be 0, 8, 16 */
#ifdef CONFIG_HAVE_ARCH_PREL32_RELOCATIONS
int hook_offset;
#else
void (*hook)(struct pci_dev *dev);
#endif
};
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() */
pci_fixup_suspend_late, /* pci_device_suspend_late() */
};
#ifdef CONFIG_HAVE_ARCH_PREL32_RELOCATIONS
#define ___DECLARE_PCI_FIXUP_SECTION(sec, name, vendor, device, class, \
class_shift, hook) \
__ADDRESSABLE(hook) \
asm(".section " #sec ", \"a\" \n" \
".balign 16 \n" \
".short " #vendor ", " #device " \n" \
".long " #class ", " #class_shift " \n" \
".long " #hook " - . \n" \
".previous \n");
/*
* Clang's LTO may rename static functions in C, but has no way to
* handle such renamings when referenced from inline asm. To work
* around this, create global C stubs for these cases.
*/
#ifdef CONFIG_LTO_CLANG
#define __DECLARE_PCI_FIXUP_SECTION(sec, name, vendor, device, class, \
class_shift, hook, stub) \
void __cficanonical stub(struct pci_dev *dev); \
void __cficanonical stub(struct pci_dev *dev) \
{ \
hook(dev); \
} \
___DECLARE_PCI_FIXUP_SECTION(sec, name, vendor, device, class, \
class_shift, stub)
#else
#define __DECLARE_PCI_FIXUP_SECTION(sec, name, vendor, device, class, \
class_shift, hook, stub) \
___DECLARE_PCI_FIXUP_SECTION(sec, name, vendor, device, class, \
class_shift, hook)
#endif
#define DECLARE_PCI_FIXUP_SECTION(sec, name, vendor, device, class, \
class_shift, hook) \
__DECLARE_PCI_FIXUP_SECTION(sec, name, vendor, device, class, \
class_shift, hook, __UNIQUE_ID(hook))
#else
/* Anonymous variables would be nice... */
#define DECLARE_PCI_FIXUP_SECTION(section, name, vendor, device, class, \
class_shift, hook) \
static const struct pci_fixup __PASTE(__pci_fixup_##name,__LINE__) __used \
__attribute__((__section__(#section), aligned((sizeof(void *))))) \
= { vendor, device, class, class_shift, hook };
#endif
#define DECLARE_PCI_FIXUP_CLASS_EARLY(vendor, device, class, \
class_shift, hook) \
DECLARE_PCI_FIXUP_SECTION(.pci_fixup_early, \
hook, vendor, device, class, class_shift, hook)
#define DECLARE_PCI_FIXUP_CLASS_HEADER(vendor, device, class, \
class_shift, hook) \
DECLARE_PCI_FIXUP_SECTION(.pci_fixup_header, \
hook, vendor, device, class, class_shift, hook)
#define DECLARE_PCI_FIXUP_CLASS_FINAL(vendor, device, class, \
class_shift, hook) \
DECLARE_PCI_FIXUP_SECTION(.pci_fixup_final, \
hook, vendor, device, class, class_shift, hook)
#define DECLARE_PCI_FIXUP_CLASS_ENABLE(vendor, device, class, \
class_shift, hook) \
DECLARE_PCI_FIXUP_SECTION(.pci_fixup_enable, \
hook, vendor, device, class, class_shift, hook)
#define DECLARE_PCI_FIXUP_CLASS_RESUME(vendor, device, class, \
class_shift, hook) \
DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume, \
resume##hook, vendor, device, class, class_shift, hook)
#define DECLARE_PCI_FIXUP_CLASS_RESUME_EARLY(vendor, device, class, \
class_shift, hook) \
DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume_early, \
resume_early##hook, vendor, device, class, class_shift, hook)
#define DECLARE_PCI_FIXUP_CLASS_SUSPEND(vendor, device, class, \
class_shift, hook) \
DECLARE_PCI_FIXUP_SECTION(.pci_fixup_suspend, \
suspend##hook, vendor, device, class, class_shift, hook)
#define DECLARE_PCI_FIXUP_CLASS_SUSPEND_LATE(vendor, device, class, \
class_shift, hook) \
DECLARE_PCI_FIXUP_SECTION(.pci_fixup_suspend_late, \
suspend_late##hook, vendor, device, class, class_shift, hook)
#define DECLARE_PCI_FIXUP_EARLY(vendor, device, hook) \
DECLARE_PCI_FIXUP_SECTION(.pci_fixup_early, \
hook, vendor, device, PCI_ANY_ID, 0, hook)
#define DECLARE_PCI_FIXUP_HEADER(vendor, device, hook) \
DECLARE_PCI_FIXUP_SECTION(.pci_fixup_header, \
hook, vendor, device, PCI_ANY_ID, 0, hook)
#define DECLARE_PCI_FIXUP_FINAL(vendor, device, hook) \
DECLARE_PCI_FIXUP_SECTION(.pci_fixup_final, \
hook, vendor, device, PCI_ANY_ID, 0, hook)
#define DECLARE_PCI_FIXUP_ENABLE(vendor, device, hook) \
DECLARE_PCI_FIXUP_SECTION(.pci_fixup_enable, \
hook, vendor, device, PCI_ANY_ID, 0, hook)
#define DECLARE_PCI_FIXUP_RESUME(vendor, device, hook) \
DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume, \
resume##hook, vendor, device, PCI_ANY_ID, 0, hook)
#define DECLARE_PCI_FIXUP_RESUME_EARLY(vendor, device, hook) \
DECLARE_PCI_FIXUP_SECTION(.pci_fixup_resume_early, \
resume_early##hook, vendor, device, PCI_ANY_ID, 0, hook)
#define DECLARE_PCI_FIXUP_SUSPEND(vendor, device, hook) \
DECLARE_PCI_FIXUP_SECTION(.pci_fixup_suspend, \
suspend##hook, vendor, device, PCI_ANY_ID, 0, hook)
#define DECLARE_PCI_FIXUP_SUSPEND_LATE(vendor, device, hook) \
DECLARE_PCI_FIXUP_SECTION(.pci_fixup_suspend_late, \
suspend_late##hook, vendor, device, PCI_ANY_ID, 0, hook)
#ifdef CONFIG_PCI_QUIRKS
void pci_fixup_device(enum pci_fixup_pass pass, struct pci_dev *dev);
#else
static inline void pci_fixup_device(enum pci_fixup_pass pass,
struct pci_dev *dev) { }
#endif
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, int mask, const char *name);
int pcim_iomap_regions_request_all(struct pci_dev *pdev, int mask,
const char *name);
void pcim_iounmap_regions(struct pci_dev *pdev, int 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 pci_dfl_cache_line_size;
extern u8 pci_cache_line_size;
/* Architecture-specific versions may override these (weak) */
void pcibios_disable_device(struct pci_dev *dev);
void pcibios_set_master(struct pci_dev *dev);
int pcibios_set_pcie_reset_state(struct pci_dev *dev,
enum pcie_reset_state state);
int pcibios_add_device(struct pci_dev *dev);
void pcibios_release_device(struct pci_dev *dev);
#ifdef CONFIG_PCI
void pcibios_penalize_isa_irq(int irq, int active);
#else
static inline void pcibios_penalize_isa_irq(int irq, int active) {}
#endif
int pcibios_alloc_irq(struct pci_dev *dev);
void pcibios_free_irq(struct pci_dev *dev);
resource_size_t pcibios_default_alignment(void);
#if defined(CONFIG_PCI_MMCONFIG) || defined(CONFIG_ACPI_MCFG)
void __init pci_mmcfg_early_init(void);
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(void);
void __iomem *pci_ioremap_bar(struct pci_dev *pdev, int bar);
void __iomem *pci_ioremap_wc_bar(struct pci_dev *pdev, int bar);
#ifdef CONFIG_PCI_IOV
int pci_iov_virtfn_bus(struct pci_dev *dev, int id);
int pci_iov_virtfn_devfn(struct pci_dev *dev, int id);
int pci_enable_sriov(struct pci_dev *dev, int nr_virtfn);
void pci_disable_sriov(struct pci_dev *dev);
int pci_iov_sysfs_link(struct pci_dev *dev, struct pci_dev *virtfn, int id);
int pci_iov_add_virtfn(struct pci_dev *dev, int id);
void pci_iov_remove_virtfn(struct pci_dev *dev, int id);
int pci_num_vf(struct pci_dev *dev);
int pci_vfs_assigned(struct pci_dev *dev);
int pci_sriov_set_totalvfs(struct pci_dev *dev, u16 numvfs);
int pci_sriov_get_totalvfs(struct pci_dev *dev);
int pci_sriov_configure_simple(struct pci_dev *dev, int nr_virtfn);
resource_size_t pci_iov_resource_size(struct pci_dev *dev, int resno);
void pci_vf_drivers_autoprobe(struct pci_dev *dev, bool probe);
/* Arch may override these (weak) */
int pcibios_sriov_enable(struct pci_dev *pdev, u16 num_vfs);
int pcibios_sriov_disable(struct pci_dev *pdev);
resource_size_t pcibios_iov_resource_alignment(struct pci_dev *dev, int resno);
#else
static inline int pci_iov_virtfn_bus(struct pci_dev *dev, int id)
{
return -ENOSYS;
}
static inline int pci_iov_virtfn_devfn(struct pci_dev *dev, int id)
{
return -ENOSYS;
}
static inline int pci_enable_sriov(struct pci_dev *dev, int nr_virtfn)
{ return -ENODEV; }
static inline int pci_iov_sysfs_link(struct pci_dev *dev,
struct pci_dev *virtfn, int id)
{
return -ENODEV;
}
static inline int pci_iov_add_virtfn(struct pci_dev *dev, int id)
{
return -ENOSYS;
}
static inline void pci_iov_remove_virtfn(struct pci_dev *dev,
int id) { }
static inline void pci_disable_sriov(struct pci_dev *dev) { }
static inline int pci_num_vf(struct pci_dev *dev) { return 0; }
static inline int pci_vfs_assigned(struct pci_dev *dev)
{ return 0; }
static inline int pci_sriov_set_totalvfs(struct pci_dev *dev, u16 numvfs)
{ return 0; }
static inline int pci_sriov_get_totalvfs(struct pci_dev *dev)
{ return 0; }
#define pci_sriov_configure_simple NULL
static inline resource_size_t pci_iov_resource_size(struct pci_dev *dev, int resno)
{ return 0; }
static inline void pci_vf_drivers_autoprobe(struct pci_dev *dev, bool probe) { }
#endif
#if defined(CONFIG_HOTPLUG_PCI) || defined(CONFIG_HOTPLUG_PCI_MODULE)
void pci_hp_create_module_link(struct pci_slot *pci_slot);
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
*
* Returns: 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);
}
/**
* pcie_caps_reg - get the PCIe Capabilities Register
* @dev: PCI device
*/
static inline u16 pcie_caps_reg(const struct pci_dev *dev)
{
return dev->pcie_flags_reg;
}
/**
* pci_pcie_type - get the PCIe device/port type
* @dev: PCI device
*/
static inline int pci_pcie_type(const struct pci_dev *dev)
{
return (pcie_caps_reg(dev) & PCI_EXP_FLAGS_TYPE) >> 4;
}
/**
* pcie_find_root_port - Get the PCIe root port device
* @dev: PCI device
*
* Traverse up the parent chain and return the PCIe Root Port PCI Device
* for a given PCI/PCIe Device.
*/
static inline struct pci_dev *pcie_find_root_port(struct pci_dev *dev)
{
while (dev) {
if (pci_is_pcie(dev) &&
pci_pcie_type(dev) == PCI_EXP_TYPE_ROOT_PORT)
return dev;
dev = pci_upstream_bridge(dev);
}
return NULL;
}
void pci_request_acs(void);
bool pci_acs_enabled(struct pci_dev *pdev, u16 acs_flags);
bool pci_acs_path_enabled(struct pci_dev *start,
struct pci_dev *end, u16 acs_flags);
int pci_enable_atomic_ops_to_root(struct pci_dev *dev, u32 cap_mask);
#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 0x0f /* End */
#define PCI_VPD_SRDT_END (PCI_VPD_STIN_END << 3)
#define PCI_VPD_SRDT_TIN_MASK 0x78
#define PCI_VPD_SRDT_LEN_MASK 0x07
#define PCI_VPD_LRDT_TIN_MASK 0x7f
#define PCI_VPD_LRDT_TAG_SIZE 3
#define PCI_VPD_SRDT_TAG_SIZE 1
#define PCI_VPD_INFO_FLD_HDR_SIZE 3
#define PCI_VPD_RO_KEYWORD_PARTNO "PN"
#define PCI_VPD_RO_KEYWORD_SERIALNO "SN"
#define PCI_VPD_RO_KEYWORD_MFR_ID "MN"
#define PCI_VPD_RO_KEYWORD_VENDOR0 "V0"
#define PCI_VPD_RO_KEYWORD_CHKSUM "RV"
/**
* 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);
}
/**
* pci_vpd_lrdt_tag - Extracts the Large Resource Data Type Tag Item
* @lrdt: Pointer to the beginning of the Large Resource Data Type tag
*
* Returns the extracted Large Resource Data Type Tag item.
*/
static inline u16 pci_vpd_lrdt_tag(const u8 *lrdt)
{
return (u16)(lrdt[0] & PCI_VPD_LRDT_TIN_MASK);
}
/**
* pci_vpd_srdt_size - Extracts the Small Resource Data Type length
* @srdt: 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;
}
/**
* pci_vpd_srdt_tag - Extracts the Small Resource Data Type Tag Item
* @srdt: Pointer to the beginning of the Small Resource Data Type tag
*
* Returns the extracted Small Resource Data Type Tag Item.
*/
static inline u8 pci_vpd_srdt_tag(const u8 *srdt)
{
return ((*srdt) & PCI_VPD_SRDT_TIN_MASK) >> 3;
}
/**
* pci_vpd_info_field_size - Extracts the information field length
* @info_field: 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];
}
/**
* pci_vpd_find_tag - Locates the Resource Data Type tag provided
* @buf: Pointer to buffered vpd data
* @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 len, u8 rdt);
/**
* 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);
/* PCI <-> OF binding helpers */
#ifdef CONFIG_OF
struct device_node;
struct irq_domain;
struct irq_domain *pci_host_bridge_of_msi_domain(struct pci_bus *bus);
bool pci_host_of_has_msi_map(struct device *dev);
/* Arch may override this (weak) */
struct device_node *pcibios_get_phb_of_node(struct pci_bus *bus);
#else /* CONFIG_OF */
static inline struct irq_domain *
pci_host_bridge_of_msi_domain(struct pci_bus *bus) { return NULL; }
static inline bool pci_host_of_has_msi_map(struct device *dev) { return false; }
#endif /* CONFIG_OF */
static inline struct device_node *
pci_device_to_OF_node(const struct pci_dev *pdev)
{
return pdev ? pdev->dev.of_node : NULL;
}
static inline struct device_node *pci_bus_to_OF_node(struct pci_bus *bus)
{
return bus ? bus->dev.of_node : NULL;
}
#ifdef CONFIG_ACPI
struct irq_domain *pci_host_bridge_acpi_msi_domain(struct pci_bus *bus);
void
pci_msi_register_fwnode_provider(struct fwnode_handle *(*fn)(struct device *));
bool pci_pr3_present(struct pci_dev *pdev);
#else
static inline struct irq_domain *
pci_host_bridge_acpi_msi_domain(struct pci_bus *bus) { return NULL; }
static inline bool pci_pr3_present(struct pci_dev *pdev) { return false; }
#endif
#ifdef CONFIG_EEH
static inline struct eeh_dev *pci_dev_to_eeh_dev(struct pci_dev *pdev)
{
return pdev->dev.archdata.edev;
}
#endif
void pci_add_dma_alias(struct pci_dev *dev, u8 devfn_from, unsigned nr_devfns);
bool pci_devs_are_dma_aliases(struct pci_dev *dev1, struct pci_dev *dev2);
int pci_for_each_dma_alias(struct pci_dev *pdev,
int (*fn)(struct pci_dev *pdev,
u16 alias, void *data), void *data);
/* Helper functions for operation of device flag */
static inline void pci_set_dev_assigned(struct pci_dev *pdev)
{
pdev->dev_flags |= PCI_DEV_FLAGS_ASSIGNED;
}
static inline void pci_clear_dev_assigned(struct pci_dev *pdev)
{
pdev->dev_flags &= ~PCI_DEV_FLAGS_ASSIGNED;
}
static inline bool pci_is_dev_assigned(struct pci_dev *pdev)
{
return (pdev->dev_flags & PCI_DEV_FLAGS_ASSIGNED) == PCI_DEV_FLAGS_ASSIGNED;
}
/**
* pci_ari_enabled - query ARI forwarding status
* @bus: the PCI bus
*
* Returns true if ARI forwarding is enabled.
*/
static inline bool pci_ari_enabled(struct pci_bus *bus)
{
return bus->self && bus->self->ari_enabled;
}
/**
* pci_is_thunderbolt_attached - whether device is on a Thunderbolt daisy chain
* @pdev: PCI device to check
*
* Walk upwards from @pdev and check for each encountered bridge if it's part
* of a Thunderbolt controller. Reaching the host bridge means @pdev is not
* Thunderbolt-attached. (But rather soldered to the mainboard usually.)
*/
static inline bool pci_is_thunderbolt_attached(struct pci_dev *pdev)
{
struct pci_dev *parent = pdev;
if (pdev->is_thunderbolt)
return true;
while ((parent = pci_upstream_bridge(parent)))
if (parent->is_thunderbolt)
return true;
return false;
}
#if defined(CONFIG_PCIEPORTBUS) || defined(CONFIG_EEH)
void pci_uevent_ers(struct pci_dev *pdev, enum pci_ers_result err_type);
#endif
/* Provide the legacy pci_dma_* API */
#include <linux/pci-dma-compat.h>
#define pci_printk(level, pdev, fmt, arg...) \
dev_printk(level, &(pdev)->dev, fmt, ##arg)
#define pci_emerg(pdev, fmt, arg...) dev_emerg(&(pdev)->dev, fmt, ##arg)
#define pci_alert(pdev, fmt, arg...) dev_alert(&(pdev)->dev, fmt, ##arg)
#define pci_crit(pdev, fmt, arg...) dev_crit(&(pdev)->dev, fmt, ##arg)
#define pci_err(pdev, fmt, arg...) dev_err(&(pdev)->dev, fmt, ##arg)
#define pci_warn(pdev, fmt, arg...) dev_warn(&(pdev)->dev, fmt, ##arg)
#define pci_notice(pdev, fmt, arg...) dev_notice(&(pdev)->dev, fmt, ##arg)
#define pci_info(pdev, fmt, arg...) dev_info(&(pdev)->dev, fmt, ##arg)
#define pci_dbg(pdev, fmt, arg...) dev_dbg(&(pdev)->dev, fmt, ##arg)
#define pci_notice_ratelimited(pdev, fmt, arg...) \
dev_notice_ratelimited(&(pdev)->dev, fmt, ##arg)
#define pci_info_ratelimited(pdev, fmt, arg...) \
dev_info_ratelimited(&(pdev)->dev, fmt, ##arg)
#define pci_WARN(pdev, condition, fmt, arg...) \
WARN(condition, "%s %s: " fmt, \
dev_driver_string(&(pdev)->dev), pci_name(pdev), ##arg)
#define pci_WARN_ONCE(pdev, condition, fmt, arg...) \
WARN_ONCE(condition, "%s %s: " fmt, \
dev_driver_string(&(pdev)->dev), pci_name(pdev), ##arg)
#endif /* LINUX_PCI_H */
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