From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753146AbdDKEk2 (ORCPT ); Tue, 11 Apr 2017 00:40:28 -0400 Received: from mx1.redhat.com ([209.132.183.28]:39692 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752832AbdDKEk0 (ORCPT ); Tue, 11 Apr 2017 00:40:26 -0400 DMARC-Filter: OpenDMARC Filter v1.3.2 mx1.redhat.com 4FA3B67EA3 Authentication-Results: ext-mx09.extmail.prod.ext.phx2.redhat.com; dmarc=none (p=none dis=none) header.from=redhat.com Authentication-Results: ext-mx09.extmail.prod.ext.phx2.redhat.com; spf=pass smtp.mailfrom=alex.williamson@redhat.com DKIM-Filter: OpenDKIM Filter v2.11.0 mx1.redhat.com 4FA3B67EA3 Date: Mon, 10 Apr 2017 22:40:18 -0600 From: Alex Williamson To: Jarod Wilson Cc: linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org, Bjorn Helgaas Subject: Re: [PATCH] pci/quirks: ITE 8893 needs quirk_use_pcie_bridge_dma_alias Message-ID: <20170410224018.1874ac78@t450s.home> In-Reply-To: <20170411010127.57858-1-jarod@redhat.com> References: <20170411010127.57858-1-jarod@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.38]); Tue, 11 Apr 2017 04:40:21 +0000 (UTC) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, 10 Apr 2017 21:01:27 -0400 Jarod Wilson wrote: > This bridge has the same problems as the ITE 8892, which were resulting in > crippling an older PCI 1Gbps NIC down to 45Mbps throughput with IOMMU and > VT-d enabled. With the patch, this old e1000 goes back up to ~900Mbps. > > Suggested-by: Alex Williamson > CC: linux-pci@vger.kernel.org > CC: Alex Williamson > CC: Bjorn Helgaas > Signed-off-by: Jarod Wilson > --- > drivers/pci/quirks.c | 2 ++ > 1 file changed, 2 insertions(+) > > diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c > index 9236e40ac055..c95fbf2431f8 100644 > --- a/drivers/pci/quirks.c > +++ b/drivers/pci/quirks.c > @@ -3914,6 +3914,8 @@ DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_ASMEDIA, 0x1080, > DECLARE_PCI_FIXUP_HEADER(0x10e3, 0x8113, quirk_use_pcie_bridge_dma_alias); > /* ITE 8892, https://bugzilla.kernel.org/show_bug.cgi?id=73551 */ > DECLARE_PCI_FIXUP_HEADER(0x1283, 0x8892, quirk_use_pcie_bridge_dma_alias); > +/* ITE 8893 has the same problem as the 8892 */ > +DECLARE_PCI_FIXUP_HEADER(0x1283, 0x8893, quirk_use_pcie_bridge_dma_alias); > /* Intel 82801, https://bugzilla.kernel.org/show_bug.cgi?id=44881#c49 */ > DECLARE_PCI_FIXUP_HEADER(0x8086, 0x244e, quirk_use_pcie_bridge_dma_alias); Reviewed-by: Alex Williamson