[v7,0/7] pci: Work around ASMedia ASM2824 PCIe link training failures

Message ID	alpine.DEB.2.21.2304042200040.37565@angie.orcam.me.uk (mailing list archive)
Headers	show Return-Path: <netdev-owner@vger.kernel.org> X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 7E1F5C761AF for <netdev@archiver.kernel.org>; Tue, 4 Apr 2023 21:56:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236559AbjDDV4E (ORCPT <rfc822;netdev@archiver.kernel.org>); Tue, 4 Apr 2023 17:56:04 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58070 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236377AbjDDV4A (ORCPT <rfc822;netdev@vger.kernel.org>); Tue, 4 Apr 2023 17:56:00 -0400 Received: from angie.orcam.me.uk (angie.orcam.me.uk [IPv6:2001:4190:8020::34]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 1307B2D50; Tue, 4 Apr 2023 14:55:57 -0700 (PDT) Received: by angie.orcam.me.uk (Postfix, from userid 500) id D974592009C; Tue, 4 Apr 2023 23:55:51 +0200 (CEST) Received: from localhost (localhost [127.0.0.1]) by angie.orcam.me.uk (Postfix) with ESMTP id D399B92009B; Tue, 4 Apr 2023 22:55:51 +0100 (BST) Date: Tue, 4 Apr 2023 22:55:51 +0100 (BST) From: "Maciej W. Rozycki" <macro@orcam.me.uk> To: Bjorn Helgaas <bhelgaas@google.com>, Mahesh J Salgaonkar <mahesh@linux.ibm.com>, Oliver O'Halloran <oohall@gmail.com>, Michael Ellerman <mpe@ellerman.id.au>, Nicholas Piggin <npiggin@gmail.com>, Christophe Leroy <christophe.leroy@csgroup.eu>, Saeed Mahameed <saeedm@nvidia.com>, Leon Romanovsky <leon@kernel.org>, "David S. Miller" <davem@davemloft.net>, Eric Dumazet <edumazet@google.com>, Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com> cc: Alex Williamson <alex.williamson@redhat.com>, Lukas Wunner <lukas@wunner.de>, Mika Westerberg <mika.westerberg@linux.intel.com>, Stefan Roese <sr@denx.de>, Jim Wilson <wilson@tuliptree.org>, David Abdurachmanov <david.abdurachmanov@gmail.com>, =?utf-8?q?Pali_Roh?= =?utf-8?q?=C3=A1r?= <pali@kernel.org>, linux-pci@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-rdma@vger.kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v7 0/7] pci: Work around ASMedia ASM2824 PCIe link training failures Message-ID: <alpine.DEB.2.21.2304042200040.37565@angie.orcam.me.uk> User-Agent: Alpine 2.21 (DEB 202 2017-01-01) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Precedence: bulk List-ID: <netdev.vger.kernel.org> X-Mailing-List: netdev@vger.kernel.org
Series	pci: Work around ASMedia ASM2824 PCIe link training failures \| expand [v7,0/7] pci: Work around ASMedia ASM2824 PCIe link training failures [v7,1/7] PCI: Export PCI link retrain timeout [v7,2/7] PCI: Execute `quirk_enable_clear_retrain_link' earlier [v7,3/7] PCI: Initialize `link_active_reporting' earlier [v7,4/7] powerpc/eeh: Rely on `link_active_reporting' [v7,5/7] net/mlx5: Rely on `link_active_reporting' [v7,6/7] PCI: pciehp: Rely on `link_active_reporting' [v7,7/7] PCI: Work around PCIe link training failures

Message ID

alpine.DEB.2.21.2304042200040.37565@angie.orcam.me.uk (mailing list archive)

Headers

Date: Tue, 4 Apr 2023 22:55:51 +0100 (BST)
From: "Maciej W. Rozycki" <macro@orcam.me.uk>
To: Bjorn Helgaas <bhelgaas@google.com>,
        Mahesh J Salgaonkar <mahesh@linux.ibm.com>,
        Oliver O'Halloran <oohall@gmail.com>,
        Michael Ellerman <mpe@ellerman.id.au>,
        Nicholas Piggin <npiggin@gmail.com>,
        Christophe Leroy <christophe.leroy@csgroup.eu>,
        Saeed Mahameed <saeedm@nvidia.com>,
        Leon Romanovsky <leon@kernel.org>,
        "David S. Miller" <davem@davemloft.net>,
        Eric Dumazet <edumazet@google.com>,
        Jakub Kicinski <kuba@kernel.org>,
        Paolo Abeni <pabeni@redhat.com>
cc: Alex Williamson <alex.williamson@redhat.com>,
 Lukas Wunner <lukas@wunner.de>,
 Mika Westerberg <mika.westerberg@linux.intel.com>, Stefan Roese <sr@denx.de>,
 Jim Wilson <wilson@tuliptree.org>,
 David Abdurachmanov <david.abdurachmanov@gmail.com>, =?utf-8?q?Pali_Roh?=
	=?utf-8?q?=C3=A1r?= <pali@kernel.org>, linux-pci@vger.kernel.org,
 linuxppc-dev@lists.ozlabs.org, linux-rdma@vger.kernel.org,
 netdev@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH v7 0/7] pci: Work around ASMedia ASM2824 PCIe link training
 failures
Message-ID: <alpine.DEB.2.21.2304042200040.37565@angie.orcam.me.uk>
User-Agent: Alpine 2.21 (DEB 202 2017-01-01)
MIME-Version: 1.0
Content-Type: text/plain; charset=US-ASCII
Precedence: bulk

Series

pci: Work around ASMedia ASM2824 PCIe link training failures | expand

Message

Maciej W. Rozycki April 4, 2023, 9:55 p.m. UTC

Hi,

 This is v7 of the change to work around a PCIe link training phenomenon 
where a pair of devices both capable of operating at a link speed above 
2.5GT/s seems unable to negotiate the link speed and continues training 
indefinitely with the Link Training bit switching on and off repeatedly 
and the data link layer never reaching the active state.

 This version has been trivially rebased on top of 6.3-rc5 and verified at 
run time.  

 Previous iteration: 
<https://lore.kernel.org/r/alpine.DEB.2.21.2302022022230.45310@angie.orcam.me.uk/>.

  Maciej