xdmapcie_caps.c File Reference

Overview

Implements all of supportive functions to expose PCIe capabilities.

MODIFICATION HISTORY:

Ver   Who  Date     Changes



1.0     tk      01/30/2019      First release

Functions
u8	XDmaPcie_HasCapability (XDmaPcie *InstancePtr, u8 Bus, u8 Device, u8 Function, u8 CapId)
	This function returns whether capability Id is available or not for the particular Function. More...
u64	XDmaPcie_GetCapability (XDmaPcie *InstancePtr, u8 Bus, u8 Device, u8 Function, u8 CapId)
	This function returns offset to the matching capability ID from the Function's Linked list of the capability registers. More...
u8	XDmaPcie_PrintAllCapabilites (XDmaPcie *InstancePtr, u8 Bus, u8 Device, u8 Function)
	This function prints all the available capabilities in the Function. More...

Function Documentation

u64 XDmaPcie_GetCapability	(	XDmaPcie *	InstancePtr,
		u8	Bus,
		u8	Device,
		u8	Function,
		u8	CapId
	)

This function returns offset to the matching capability ID from the Function's Linked list of the capability registers.

Parameters

InstancePtr	pointer to XDmaPcie Instance Pointer
Bus	is the number of the Bus
Device	is the number of the Device
Function	is number of the Function
cap	id to get capability pointer offset

Returns

u64 capability pointer if available 0 if not available.

References XDmaPcie::Config, XDmaPcie_Config::Ecam, and XDmaPcie_ReadRemoteConfigSpace().

u8 XDmaPcie_HasCapability	(	XDmaPcie *	InstancePtr,
		u8	Bus,
		u8	Device,
		u8	Function,
		u8	CapId
	)

This function returns whether capability Id is available or not for the particular Function.

Parameters

InstancePtr	pointer to XDmaPcie Instance Pointer
Bus	is the number of the Bus
Device	is the number of the Device
Function	is number of the Function
cap	id to check capability pointer availability

Returns

u32 0 if capability is not available 1 if capability is available

References XDmaPcie_ReadRemoteConfigSpace().

u8 XDmaPcie_PrintAllCapabilites	(	XDmaPcie *	InstancePtr,
		u8	Bus,
		u8	Device,
		u8	Function
	)

This function prints all the available capabilities in the Function.

Parameters

InstancePtr	pointer to XDmaPcie Instance Pointer
Bus	is the number of the Bus
Device	is the number of the Device
Function	is number of the Function

Returns

XST_SUCCESS on success XST_FAILURE on failure.

References XDmaPcie_ReadRemoteConfigSpace().