linux-kernel - RE: pcie: xilinx: kernel hang

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Date:   Fri, 31 Jan 2020 11:33:03 +0000
From:   David Laight <David.Laight@...LAB.COM>
To:     'Bjorn Helgaas' <helgaas@...nel.org>,
        Muni Sekhar <munisekharrms@...il.com>
CC:     "linux-pci@...r.kernel.org" <linux-pci@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: pcie: xilinx: kernel hang - ISR readl()

From: Bjorn Helgaas
> Sent: 30 January 2020 19:01
..
> > > You could learn this either via a PCIe analyzer (expensive piece of
> > > hardware) or possibly some logic in the FPGA that would log PCIe
> > > transactions in a buffer and make them accessible via some other
> > > interface (you mentioned it had parallel and other interfaces).

You can probably use the Xilinx equivalent of Altera 'signaltap'
to work out what is happening within the fpga.

	David

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