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C6678 做pcie的 RC端,通过switch不能访问EP设备的配置空间!急急急!!!



我想实现这样一个功能:C6678做PCIE的RC端,通过SWITCH芯片连接其他pcie设备,并通信。SWITCH芯片用的是PEX8743。

现在已经能够通过C6678的remote空间访问到SWITCH芯片的Upstream Port和Downstream port的Configuration Space了,并且为每一个端口分配了BUS Number,但是通过bus number 找不到挂载在Downstream port上的EP设备,有谁做过相关的功能,能否指点一下?感激不尽