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| axipcie Xilinx SDK Drivers API Documentation

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axipcie Documentation

This file contains the software API definition of the Xilinx AXI PCIe IP (XAxiPcie). This driver provides "C" function interface to application/upper layer to access the hardware.

Features The driver provides its user with entry points

- To initialize and configure itself and the hardware
- To access PCIe configuration space locally
- To enable/disable and to report errors (interrupts).

IP Hardware Configuration The AXI PCIE IP supports only the endpoint for Virtex®-6 and Spartan®-6 families.

The AXI PCIE IP supports both the endpoint and Root Port for the Kintex® 7 devices.

Driver Initialization & Configuration

The XAxiPcie_Config structure is used by the driver to configure itself. This configuration structure is typically created by the tool-chain based on HW build properties.

To support multiple runtime loading and initialization strategies employed by various operating systems, the driver instance can be initialized in the following way:

- XAxiPcie_LookupConfig(DeviceId) - Use the device identifier to find the static configuration structure defined in xaxipcie_g.c. This is setup by the tools. For some operating systems the config structure will be initialized by the software and this call is not needed.
- XAxiPcie_CfgInitialize(InstancePtr, CfgPtr, EffectiveAddr) - Uses a configuration structure provided by the caller. If running in a system with address translation, the provided virtual memory base address replaces the physical address present in the configuration structure.

Interrupt Management

The XAxiPcie driver provides interrupt management functions. It allows the caller to enable/disable each individual interrupt as well as get/clear pending interrupts. Implementation of callback handlers is left to the user.

Note

    MODIFICATION HISTORY:

    Ver   Who  Date     Changes

    1.00a rkv  03/03/11 Original code.
    2.00a nm   10/19/11  Added support of pcie root complex functionality.
                   Changed these functions
                            -renamed function XAxiPcie_GetRequestId to
                    XAxiPcie_GetRequesterId
                    -added two functions arguments RootPortPtr &
                    ECAMSizePtr to XAxiPcie_GetBridgeInfo API
                   Added these new API for root complex support

    XAxiPcie_GetRootPortStatusCtrl
    XAxiPcie_SetRootPortStatusCtrl
    XAxiPcie_SetRootPortMSIBase
    XAxiPcie_GetRootPortErrFIFOMsg
    XAxiPcie_ClearRootPortErrFIFOMsg
    XAxiPcie_GetRootPortIntFIFOReg
    XAxiPcie_ClearRootPortIntFIFOReg
    XAxiPcie_WriteLocalConfigSpace
    XAxiPcie_ComposeExternalConfigAddress
    XAxiPcie_ReadRemoteConfigSpace
    XAxiPcie_WriteRemoteConfigSpace

    2.01a nm   04/01/12  Removed XAxiPcie_SetRequesterId and
                   XAxiPcie_SetBlPortNumber APIs as these are writing
                   to Read Only bits for CR638299.
    2.02a nm   08/01/12  Updated for removing compilation errors with C++,
                   changed XCOMPONENT_IS_READY to XIL_COMPONENT_IS_READY
                   Removed the Endian Swap in
                   XAxiPcie_ReadRemoteConfigSpace and
                   XAxiPcie_WriteRemoteConfigSpace APIs as the HW
                   has been fixed and the swapping is not required
                   in  the driver (CR 657412)
    2.03a srt  04/13/13  Removed Warnings (CR 705004).
    2.04a srt  09/06/13  Fixed CR 734175:
                   C_BASEADDR and C_HIGHADDR configuration parameters are
                           renamed to BASEADDR and HIGHADDR in Vivado builds.
                         Modified the tcl for this change.
    3.0   adk  19/12/13 Updated as per the New Tcl API's
    3.1   sk   11/10/15 Used UINTPTR instead of u32 for Baseaddress CR# 867425.
                        Changed the prototype of XAxiPcie_CfgInitialize API.
          ms   01/23/17 Added xil_printf statement in main function for all
                       examples to ensure that "Successfully ran" and "Failed"
                       strings are available in all examples. This is a fix
                       for CR-965028.
          ms   03/17/17 Added readme.txt file in examples folder for doxygen
                        generation.
          ms   04/05/17 Added tabspace for return statements in functions
                        of axipcie examples for proper documentation while
                        generating doxygen.