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QNX SDP is a cross-compiling and debugging environment, including an IDE and command-line tools, for building binary images and programs for target boards running the QNX OS 8.0.
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pci_device_cfg_cap_isenabled()
Check to see if a capability is enabled or disabled

QNX Momentics IDE User's Guide
This User's Guide describes version 8.0 of the Integrated Development Environment (IDE) that's part of the QNX Tool Suite.
QNX Software Development Platform
QNX SDP is a cross-compiling and debugging environment, including an IDE and command-line tools, for building binary images and programs for target boards running the QNX OS 8.0.
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    - PCI Server Overview
      The PCI server manages the hierarchy of PCI devices attached to a system.
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      Partitioning and segmentation provide flexibility in using the PCI subsystem, and specifically the pci-server. It provides the ability to achieve:
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    - API Reference
      - pci_bdf()
        Get the Bus/Device/Function associated with a device handle
      - pci_bdf_t
        Base type that encodes a Bus/Device/Function
      - pci_chassis_slot_bridge()
        Get the Bus/Device/Function of the bridge that's connected to the specified chassis and slot
      - pci_chassis_slot_device()
        Get the Bus/Device/Function of the device that resides in the specified chassis and slot
      - pci_device_attach()
        Attach a device
      - pci_device_cfg_cap_disable(), pci_device_cfg_cap_enable()
        Enable or disable a capability
      - pci_device_cfg_cap_isenabled()
        Check to see if a capability is enabled or disabled
      - pci_device_cfg_rd*()
        Read from the device-specific PCI configuration space registers
      - pci_device_cfg_wr*()
        Write to the device-specific PCI configuration space registers
      - pci_device_chassis_slot()
        Get the chassis and slot for a device
      - pci_device_detach()
        Detach a device
      - pci_device_find()
        Locate a device that matches the specified criteria
      - pci_device_find_capid()
        Get the index of a capability for a device
      - pci_device_find_capid_next()
        Get the index of the next occurrence of a specific capability of a device
      - pci_device_is_multi_func()
        Determine whether or not a device is a multifunction device
      - pci_device_map_as()
        Get the translation between CPU memory addresses and PCI addresses
      - pci_device_read_*()
        Read information from the common PCI configuration space registers
      - pci_device_read_ba()
        Get the base addresses of a device
      - pci_device_read_cap()
        Load a capability module
      - pci_device_read_capid()
        Get the ID of the nth capability that a device supports
      - pci_device_read_irq()
        Get the IRQs associated with a device
      - pci_device_reset()
        Reset a device
      - pci_device_rom_disable(), pci_device_rom_enable()
        Enable or disable expansion ROM
      - pci_device_write_cmd(), pci_device_write_status()
        Write a value in the device command or status register
      - pci_mux_command()
        Send a command to the PCI connector or multiplexer
      - pci_mux_connect(), pci_mux_direct_connect()
        Open a connection and send a connection message
      - pci_mux_disconnect()
        Ends a connection
      - pci_mux_fini()
        Clean a connection
      - pci_mux_init()
        Initiate and allocate connection structure
      - pci_mux_version()
        Get the PCI version
      - pci_strerror()
        Get the description of an error code
    - Capability Modules and APIs
      This appendix describes some general-purpose capability modules and their APIs.
    - Example
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QNX Software in the Cloud
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QNX Toolkit for Visual Studio Code
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QNX Hypervisor User's Guide
This User's Guide explains the QNX hypervisor architecture and provides instructions for installing and running a QNX Hypervisor system, changing system components and configuration, and using hypervisor features such as virtual devices (vdevs).
Typographical Conventions, Support, and Licensing
This section describes the typographical conventions used throughout the documentation, explains how to obtain technical support, and provides some information about licensing.

pci_device_cfg_cap_isenabled()

QNX SDP8.0PCI Server User's GuideAPIConfiguration

Check to see if a capability is enabled or disabled

Synopsis:

#include <pci/pci.h>

bool_t pci_device_cfg_cap_isenabled( pci_devhdl_t hdl,
                                     pci_cap_t cap );

Arguments:

hdl: The handle of the device, obtained by calling pci_device_attach().
cap: A pointer to a capability structure.

Library:

libpci

Use the -l pci option to qcc to link against this library.

Description:

This function determines whether the capability identified by cap for the device identified by hdl is enabled or disabled. You must have already attached to the device by successfully calling pci_device_attach(). You can obtain the device capability by calling pci_device_read_cap().

Returns:

true or false, depending on the capability state.

Classification:


Safety:
Cancellation point	No
Signal handler	No
Thread	Yes

See also:

pci_device_cfg_cap_disable(), pci_device_cfg_cap_enable()

Page updated: March 05, 2025