From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-0.9 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id A9245C43603 for ; Mon, 9 Dec 2019 12:24:22 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 6D2832073D for ; Mon, 9 Dec 2019 12:24:22 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="Q0eO0j9t" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727541AbfLIMYV (ORCPT ); Mon, 9 Dec 2019 07:24:21 -0500 Received: from us-smtp-delivery-1.mimecast.com ([207.211.31.120]:51533 "EHLO us-smtp-1.mimecast.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726687AbfLIMYU (ORCPT ); Mon, 9 Dec 2019 07:24:20 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1575894258; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=Om3e8U2zV0QaZB81qgLCidrh7Jm1jTyKjoRsq4wAO1A=; b=Q0eO0j9trDdYlBH+N5djComR9zXXOFh5QzSEOidW3mWMGsFqvyHvR/VFaQIrd99vtAo2R5 TXLwr6sUcb+TStMwukCbjecer8KPk26JkdlDQ6T17UkdyDt7tdWN78iNZt1k/VNWR6ZqYk M1OLEo8R/d1a42BLKm/i+T5Iv49XXH0= Received: from mail-qk1-f199.google.com (mail-qk1-f199.google.com [209.85.222.199]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-195-BAM8xrFbPMW4qMDZ__CMSw-1; Mon, 09 Dec 2019 07:24:17 -0500 Received: by mail-qk1-f199.google.com with SMTP id b9so9832562qkl.13 for ; Mon, 09 Dec 2019 04:24:17 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=R2wkCojmmyM/eMvArR6da0gzEriG+0Vl5wpoIupE6a0=; b=IwiZRCP72uA7VdVP/W2aZE+b/0IhuCrfAn7hgXK3jWWsKXsjTQKvyblbg4OfoDZuuz 0sny4E+9fB7kK+3k+6i2NojpKgyJA0uYOfYNhFcDYeCX1pE6Td63K58egIwLuKPbaPO6 RFFnMn4ulMLGIimPA9ldZI4DDNaRLoVn31QLkNJfFfo81I8LyF8bY6WogKJXrPtoMbZC 85AgW+zTVZU3sKjhsVWvISALnGthZrcO1Bi4PbVD+Ln4OZFwVZ30u/oJNCGLaWjARst0 Sbzy+cSgApIg4fg72SF35L1DmCuiWOxViQ+2e2SAwVguR5UNjHT0RIg2CwIoDhp38HpJ ZsPg== X-Gm-Message-State: APjAAAVP/VU8qaArOkoBpJz01OKyC3z3sBGcgU3720PbqSCnGhf2iEKh ZSzC6rhZrf2Ie1r+M3zYijIjhqNgstf86SsGgVq/GjC3M+D3xWyWBhIXvGqvJWC3lQzCOJCOQvl F77yg8CagZDF1NHglQuq+L9/Ku1rKBHDv5TMDXZY9 X-Received: by 2002:a37:c57:: with SMTP id 84mr6830057qkm.157.1575894256892; Mon, 09 Dec 2019 04:24:16 -0800 (PST) X-Google-Smtp-Source: APXvYqzuZX+dUghHi7wPyOkamBRcZ36z3Od2tRPaKnHnAmGQD/DMSGgIgQOLFSwroihlGD9ll8sjWxVfTu+lqQTAIVU= X-Received: by 2002:a37:c57:: with SMTP id 84mr6830033qkm.157.1575894256520; Mon, 09 Dec 2019 04:24:16 -0800 (PST) MIME-Version: 1.0 References: <20191121112821.GU11621@lahna.fi.intel.com> <20191121114610.GW11621@lahna.fi.intel.com> <20191127114856.GZ11621@lahna.fi.intel.com> In-Reply-To: From: Karol Herbst Date: Mon, 9 Dec 2019 13:24:04 +0100 Message-ID: Subject: Re: [PATCH v4] pci: prevent putting nvidia GPUs into lower device states on certain intel bridges To: "Rafael J. Wysocki" Cc: Lyude Paul , Mika Westerberg , Bjorn Helgaas , LKML , "Rafael J . Wysocki" , Linux PCI , Linux PM , dri-devel , nouveau , Dave Airlie , Mario Limonciello X-MC-Unique: BAM8xrFbPMW4qMDZ__CMSw-1 X-Mimecast-Spam-Score: 0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Dec 9, 2019 at 12:39 PM Rafael J. Wysocki wrote= : > > On Mon, Dec 9, 2019 at 12:17 PM Karol Herbst wrote: > > > > anybody any other ideas? > > Not yet, but I'm trying to collect some more information. > > > It seems that both patches don't really fix > > the issue and I have no idea left on my side to try out. The only > > thing left I could do to further investigate would be to reverse > > engineer the Nvidia driver as they support runpm on Turing+ GPUs now, > > but I've heard users having similar issues to the one Lyude told us > > about... and I couldn't verify that the patches help there either in a > > reliable way. > > It looks like the newer (8+) versions of Windows expect the GPU driver > to prepare the GPU for power removal in some specific way and the > latter fails if the GPU has not been prepared as expected. > > Because testing indicates that the Windows 7 path in the platform > firmware works, it may be worth trying to do what it does to the PCIe > link before invoking the _OFF method for the power resource > controlling the GPU power. > ohh, that actually makes sense. Didn't think of that yet. > If the Mika's theory that the Win7 path simply turns the PCIe link off > is correct, then whatever the _OFF method tries to do to the link > after that should not matter. > By the way, and I was only thinking about it after sending my last email out, do you think we should fail the runtime resume path if the device gets stuck in a power state? Currently pci core always calls into the driver regardless, but maybe for D3cold it really makes sense to just bail and refuse to resume? I think I tried that as an early "fix" and might even have a patch around. This should at least prevent crashes inside drivers trying to access invalid memory or getting stuck in loops. > > On Wed, Nov 27, 2019 at 8:55 PM Lyude Paul wrote: > > > > > > On Wed, 2019-11-27 at 12:51 +0100, Karol Herbst wrote: > > > > On Wed, Nov 27, 2019 at 12:49 PM Mika Westerberg > > > > wrote: > > > > > On Tue, Nov 26, 2019 at 06:10:36PM -0500, Lyude Paul wrote: > > > > > > Hey-this is almost certainly not the right place in this thread= to > > > > > > respond, > > > > > > but this thread has gotten so deep evolution can't push the sub= ject > > > > > > further to > > > > > > the right, heh. So I'll just respond here. > > > > > > > > > > :) > > > > > > > > > > > I've been following this and helping out Karol with testing her= e and > > > > > > there. > > > > > > They had me test Bjorn's PCI branch on the X1 Extreme 2nd gener= ation, > > > > > > which > > > > > > has a turing GPU and 8086:1901 PCI bridge. > > > > > > > > > > > > I was about to say "the patch fixed things, hooray!" but it see= ms that > > > > > > after > > > > > > trying runtime suspend/resume a couple times things fall apart = again: > > > > > > > > > > You mean $subject patch, no? > > > > > > > > > > > > > no, I told Lyude to test the pci/pm branch as the runpm errors we s= aw > > > > on that machine looked different. Some BAR error the GPU reported > > > > after it got resumed, so I was wondering if the delays were helping > > > > with that. But after some cycles it still caused the same issue, th= at > > > > the GPU disappeared. Later testing also showed that my patch also > > > > didn't seem to help with this error sadly :/ > > > > > > > > > > [ 686.883247] nouveau 0000:01:00.0: DRM: suspending object tre= e... > > > > > > [ 752.866484] ACPI Error: Aborting method \_SB.PCI0.PEG0.PEGP.= NVPO due > > > > > > to previous error (AE_AML_LOOP_TIMEOUT) (20190816/psparse-529) > > > > > > [ 752.866508] ACPI Error: Aborting method \_SB.PCI0.PGON due t= o > > > > > > previous error (AE_AML_LOOP_TIMEOUT) (20190816/psparse-529) > > > > > > [ 752.866521] ACPI Error: Aborting method \_SB.PCI0.PEG0.PG00.= _ON due > > > > > > to previous error (AE_AML_LOOP_TIMEOUT) (20190816/psparse-529) > > > > > > > > > > This is probably the culprit. The same AML code fails to properly= turn > > > > > on the device. > > > > > > > > > > Is acpidump from this system available somewhere? > > > > > > Attached it to this email > > > > > > > > > > > -- > > > Cheers, > > > Lyude Paul > > > From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-0.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 33699C00454 for ; Mon, 9 Dec 2019 12:24:24 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 1256D20726 for ; Mon, 9 Dec 2019 12:24:24 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 1256D20726 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=dri-devel-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 0BDFF6E433; Mon, 9 Dec 2019 12:24:23 +0000 (UTC) Received: from us-smtp-1.mimecast.com (us-smtp-delivery-1.mimecast.com [207.211.31.120]) by gabe.freedesktop.org (Postfix) with ESMTPS id 951A76E439 for ; Mon, 9 Dec 2019 12:24:21 +0000 (UTC) Received: from mail-qk1-f200.google.com (mail-qk1-f200.google.com [209.85.222.200]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-231-9vbQ7jKzNFq1dk4si83Nzg-1; Mon, 09 Dec 2019 07:24:17 -0500 Received: by mail-qk1-f200.google.com with SMTP id m13so9838959qka.9 for ; Mon, 09 Dec 2019 04:24:17 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=R2wkCojmmyM/eMvArR6da0gzEriG+0Vl5wpoIupE6a0=; b=IIyJ8cEvd/jORvTW5vU/DBCxhDw17Q7rMu946hSaX/FR6ED+DR9GIyszVb5nw2AjRX J/isYBmSm2sGltuhJQctoWwe8JWfO/hQQkXBFU4iQKbEXyHdH7TMi773c6ne3hS+lqB6 PopEFJ7tttwV0a96/4T+W5JlSwwI/0+/tZTq4qKepc+3tOd0wpGUtupStgsA1yYgREAI ALRB2hx2vbWCtdzXc4lUFhqPFRZMjwmzK7NZxJ9CLwIeN/DWH9E+HGtG4yWuzSi5UR7h Akq0vaaHrS1TlLjG88sEyMKmPLRQxJtN4l9w8F/FTeqj4t17+lSDwYdscrpH3h+1+X5y hP+w== X-Gm-Message-State: APjAAAXEVuiCiyqpHeVXaGKdqfMoDpqNolqR5mtAvM/FlKb7y9YyLATP Gxn/T8z/P6bHFXQP/QQGVCpoLa49BhtgMHnNhA4mE7ls0NP7yyLniiQHPCp36QH7ZE5SYDXhQTr fwjSSZ+TKClgzJcrfcSzNllbxiiF9WwD5vX4MkaE8BHd6 X-Received: by 2002:a37:c57:: with SMTP id 84mr6830061qkm.157.1575894256893; Mon, 09 Dec 2019 04:24:16 -0800 (PST) X-Google-Smtp-Source: APXvYqzuZX+dUghHi7wPyOkamBRcZ36z3Od2tRPaKnHnAmGQD/DMSGgIgQOLFSwroihlGD9ll8sjWxVfTu+lqQTAIVU= X-Received: by 2002:a37:c57:: with SMTP id 84mr6830033qkm.157.1575894256520; Mon, 09 Dec 2019 04:24:16 -0800 (PST) MIME-Version: 1.0 References: <20191121112821.GU11621@lahna.fi.intel.com> <20191121114610.GW11621@lahna.fi.intel.com> <20191127114856.GZ11621@lahna.fi.intel.com> In-Reply-To: From: Karol Herbst Date: Mon, 9 Dec 2019 13:24:04 +0100 Message-ID: Subject: Re: [PATCH v4] pci: prevent putting nvidia GPUs into lower device states on certain intel bridges To: "Rafael J. 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Wysocki" , LKML , dri-devel , Bjorn Helgaas , nouveau Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" T24gTW9uLCBEZWMgOSwgMjAxOSBhdCAxMjozOSBQTSBSYWZhZWwgSi4gV3lzb2NraSA8cmFmYWVs QGtlcm5lbC5vcmc+IHdyb3RlOgo+Cj4gT24gTW9uLCBEZWMgOSwgMjAxOSBhdCAxMjoxNyBQTSBL YXJvbCBIZXJic3QgPGtoZXJic3RAcmVkaGF0LmNvbT4gd3JvdGU6Cj4gPgo+ID4gYW55Ym9keSBh bnkgb3RoZXIgaWRlYXM/Cj4KPiBOb3QgeWV0LCBidXQgSSdtIHRyeWluZyB0byBjb2xsZWN0IHNv bWUgbW9yZSBpbmZvcm1hdGlvbi4KPgo+ID4gSXQgc2VlbXMgdGhhdCBib3RoIHBhdGNoZXMgZG9u J3QgcmVhbGx5IGZpeAo+ID4gdGhlIGlzc3VlIGFuZCBJIGhhdmUgbm8gaWRlYSBsZWZ0IG9uIG15 IHNpZGUgdG8gdHJ5IG91dC4gVGhlIG9ubHkKPiA+IHRoaW5nIGxlZnQgSSBjb3VsZCBkbyB0byBm dXJ0aGVyIGludmVzdGlnYXRlIHdvdWxkIGJlIHRvIHJldmVyc2UKPiA+IGVuZ2luZWVyIHRoZSBO dmlkaWEgZHJpdmVyIGFzIHRoZXkgc3VwcG9ydCBydW5wbSBvbiBUdXJpbmcrIEdQVXMgbm93LAo+ ID4gYnV0IEkndmUgaGVhcmQgdXNlcnMgaGF2aW5nIHNpbWlsYXIgaXNzdWVzIHRvIHRoZSBvbmUg 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