From nobody Thu Dec 26 23:06:06 2024 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 149A715697B for ; Fri, 29 Nov 2024 20:36:51 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.133.124 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1732912613; cv=none; b=HsjZssza/gFxh0GcOO1Cqpjzkx5qEHhm9TdBwnP/0rQ1xKjDJmkG97L9vnJBONubMqTrHFLoJCW7nBwrsmW/IqpSVfHjJQsV/Dqe3sbOvjMwlIL0vU/Xb9Nqr1HyTafbV5XAaEpuoep5cnFqwjmU9jp2jAjVoSgJ9xFGYfP2GzM= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1732912613; c=relaxed/simple; bh=YZlE/jBpFo+64Z8yAfT8C1Ta79oTRVsY9z4cyYBUpFg=; h=From:To:Subject:Date:Message-ID:MIME-Version; b=IqjaFuEb9mrdOodygTE22M795fYv29fYMmIpWXse2efFEklMCHQSFNHz99i3KfydRxpEK3owpVwhgmO4/uCXpcGelTV4btRkDhBa/K9FJ3HhSOKMvMLIOrB7kqbjkvMTG7AXJrxWqZ5BhE4zh5CBISU9PEyYwmXgONvA2cohsL4= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=redhat.com; spf=pass smtp.mailfrom=redhat.com; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b=DxrP20O0; arc=none smtp.client-ip=170.10.133.124 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=redhat.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=redhat.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="DxrP20O0" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1732912611; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding; bh=/a5M7IdP8lXOGSSM/sXvBBskiEQyvgFUKp3QFL06WRg=; b=DxrP20O0fskGJ3v8vmBNSBZaTSFQ9CPs+ofLCLdIoSbB/IHof5vfNYVFrvRDnN9u2eC/aw XdRtvhMo16tvOyXPeZ5PgVJOpL7HevjcsGGKCNTrv9KO/iLiU5kkxiChvemryqc+7h+OZp 1LeifA1gAkcDF/EG/dS+kIBwvvAJK7k= Received: from mx-prod-mc-03.mail-002.prod.us-west-2.aws.redhat.com (ec2-54-186-198-63.us-west-2.compute.amazonaws.com [54.186.198.63]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-454-jRuj2I_4OEG2qe8KdOixPw-1; Fri, 29 Nov 2024 15:36:45 -0500 X-MC-Unique: jRuj2I_4OEG2qe8KdOixPw-1 X-Mimecast-MFC-AGG-ID: jRuj2I_4OEG2qe8KdOixPw Received: from mx-prod-int-04.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-04.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.40]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-03.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 6E69E1955DCA; Fri, 29 Nov 2024 20:36:43 +0000 (UTC) Received: from lszubowi.redhat.com (unknown [10.22.88.155]) by mx-prod-int-04.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id EF86E195605A; Fri, 29 Nov 2024 20:36:40 +0000 (UTC) From: Lenny Szubowicz To: pavan.chebbi@broadcom.com, mchan@broadcom.com, andrew+netdev@lunn.ch, davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, george.shuklin@gmail.com, andrea.fois@eventsense.it, netdev@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [patch v2] tg3: Disable tg3 PCIe AER on system reboot Date: Fri, 29 Nov 2024 15:36:40 -0500 Message-ID: <20241129203640.54492-1-lszubowi@redhat.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.0 on 10.30.177.40 Content-Type: text/plain; charset="utf-8" Disable PCIe AER on the tg3 device on system reboot on a limited list of Dell PowerEdge systems. This prevents a fatal PCIe AER event on the tg3 device during the ACPI _PTS (prepare to sleep) method for S5 on those systems. The _PTS is invoked by acpi_enter_sleep_state_prep() as part of the kernel's reboot sequence as a result of commit 38f34dba806a ("PM: ACPI: reboot: Reinstate S5 for reboot"). There was an earlier fix for this problem by commit 2ca1c94ce0b6 ("tg3: Disable tg3 device on system reboot to avoid triggering AER"). But it was discovered that this earlier fix caused a reboot hang when some Dell PowerEdge servers were booted via ipxe. To address this reboot hang, the earlier fix was essentially reverted by commit 9fc3bc764334 ("tg3: power down device only on SYSTEM_POWER_OFF"). This re-exposed the tg3 PCIe AER on reboot problem. This fix is not an ideal solution because the root cause of the AER is in system firmware. Instead, it's a targeted work-around in the tg3 driver. Note also that the PCIe AER must be disabled on the tg3 device even if the system is configured to use "firmware first" error handling. Fixes: 9fc3bc764334 ("tg3: power down device only on SYSTEM_POWER_OFF") Signed-off-by: Lenny Szubowicz --- drivers/net/ethernet/broadcom/tg3.c | 59 +++++++++++++++++++++++++++++ 1 file changed, 59 insertions(+) diff --git a/drivers/net/ethernet/broadcom/tg3.c b/drivers/net/ethernet/bro= adcom/tg3.c index 9cc8db10a8d6..12ae5a976ca7 100644 --- a/drivers/net/ethernet/broadcom/tg3.c +++ b/drivers/net/ethernet/broadcom/tg3.c @@ -55,6 +55,7 @@ #include #include #include +#include =20 #include #include @@ -18192,6 +18193,51 @@ static int tg3_resume(struct device *device) =20 static SIMPLE_DEV_PM_OPS(tg3_pm_ops, tg3_suspend, tg3_resume); =20 +/* + * Systems where ACPI _PTS (Prepare To Sleep) S5 will result in a fatal + * PCIe AER event on the tg3 device if the tg3 device is not, or cannot + * be, powered down. + */ +static const struct dmi_system_id tg3_restart_aer_quirk_table[] =3D { + { + .matches =3D { + DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), + DMI_MATCH(DMI_PRODUCT_NAME, "PowerEdge R440"), + }, + }, + { + .matches =3D { + DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), + DMI_MATCH(DMI_PRODUCT_NAME, "PowerEdge R540"), + }, + }, + { + .matches =3D { + DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), + DMI_MATCH(DMI_PRODUCT_NAME, "PowerEdge R640"), + }, + }, + { + .matches =3D { + DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), + DMI_MATCH(DMI_PRODUCT_NAME, "PowerEdge R650"), + }, + }, + { + .matches =3D { + DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), + DMI_MATCH(DMI_PRODUCT_NAME, "PowerEdge R740"), + }, + }, + { + .matches =3D { + DMI_MATCH(DMI_SYS_VENDOR, "Dell Inc."), + DMI_MATCH(DMI_PRODUCT_NAME, "PowerEdge R750"), + }, + }, + {} +}; + static void tg3_shutdown(struct pci_dev *pdev) { struct net_device *dev =3D pci_get_drvdata(pdev); @@ -18208,6 +18254,19 @@ static void tg3_shutdown(struct pci_dev *pdev) =20 if (system_state =3D=3D SYSTEM_POWER_OFF) tg3_power_down(tp); + else if (system_state =3D=3D SYSTEM_RESTART && + dmi_first_match(tg3_restart_aer_quirk_table) && + pdev->current_state <=3D PCI_D3hot) { + /* + * Disable PCIe AER on the tg3 to avoid a fatal + * error during this system restart. + */ + pcie_capability_clear_word(pdev, PCI_EXP_DEVCTL, + PCI_EXP_DEVCTL_CERE | + PCI_EXP_DEVCTL_NFERE | + PCI_EXP_DEVCTL_FERE | + PCI_EXP_DEVCTL_URRE); + } =20 rtnl_unlock(); =20 --=20 2.45.2