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=-9.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable 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 77906C35641 for ; Fri, 21 Feb 2020 08:07:08 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 4EC0A20722 for ; Fri, 21 Feb 2020 08:07:08 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1582272428; bh=sHMiD2s6qCYL0fQzvhMv7F2WRvsDG09B1rN0XDLI99Y=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=VvLnqm7BJ1nZz5qLndZe5CazCgdXxdb8z2fAPS2AedxYXnhvDdXJzliCnP3x1Q0bM Xf+RxGa18KpQoKNDpeexxS2gzA61k1OKFw8mJ0zJCP7SZoi4DAtLY4k6N77L1hEEDx Cj+GVwZkSLrKJK9KVRwhjqUEzsBzT2nTDKribA4s= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732027AbgBUIHH (ORCPT ); Fri, 21 Feb 2020 03:07:07 -0500 Received: from mail.kernel.org ([198.145.29.99]:41110 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731714AbgBUIHD (ORCPT ); Fri, 21 Feb 2020 03:07:03 -0500 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id D463520722; Fri, 21 Feb 2020 08:07:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1582272423; bh=sHMiD2s6qCYL0fQzvhMv7F2WRvsDG09B1rN0XDLI99Y=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=T3X1Yaao3dlkUitOzMeS2gxtjGr0zbKT5WZhsGkacXyYR76+/LmHE6LjFfM5SVsaf AfPTn2xuVSHl2G0EiEU2+EpvWDbTXjW1fEhEEJisQ9UbLu/lsk94NW1M7/2UdnB666 Mt6OMwzTDPK+28s4TGbNddF+82iFMOnZuWfGRusw= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, James Sewart , Bjorn Helgaas , Logan Gunthorpe , Sasha Levin Subject: [PATCH 5.4 136/344] PCI: Add DMA alias quirk for PLX PEX NTB Date: Fri, 21 Feb 2020 08:38:55 +0100 Message-Id: <20200221072401.183770270@linuxfoundation.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200221072349.335551332@linuxfoundation.org> References: <20200221072349.335551332@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: James Sewart [ Upstream commit 7b90dfc4873b87c468cc6046538f46a531c1d785 ] The PLX PEX NTB forwards DMA transactions using Requester IDs that don't exist as PCI devices. The devfn for a transaction is used as an index into a lookup table storing the origin of a transaction on the other side of the bridge. Alias all possible devfns to the NTB device so that any transaction coming in is governed by the mappings for the NTB. Signed-off-by: James Sewart Signed-off-by: Bjorn Helgaas Reviewed-by: Logan Gunthorpe Signed-off-by: Sasha Levin --- drivers/pci/quirks.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c index 67a9ad3734d18..2fdceaab73072 100644 --- a/drivers/pci/quirks.c +++ b/drivers/pci/quirks.c @@ -5352,6 +5352,21 @@ SWITCHTEC_QUIRK(0x8574); /* PFXI 64XG3 */ SWITCHTEC_QUIRK(0x8575); /* PFXI 80XG3 */ SWITCHTEC_QUIRK(0x8576); /* PFXI 96XG3 */ +/* + * The PLX NTB uses devfn proxy IDs to move TLPs between NT endpoints. + * These IDs are used to forward responses to the originator on the other + * side of the NTB. Alias all possible IDs to the NTB to permit access when + * the IOMMU is turned on. + */ +static void quirk_plx_ntb_dma_alias(struct pci_dev *pdev) +{ + pci_info(pdev, "Setting PLX NTB proxy ID aliases\n"); + /* PLX NTB may use all 256 devfns */ + pci_add_dma_alias(pdev, 0, 256); +} +DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_PLX, 0x87b0, quirk_plx_ntb_dma_alias); +DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_PLX, 0x87b1, quirk_plx_ntb_dma_alias); + /* * On Lenovo Thinkpad P50 SKUs with a Nvidia Quadro M1000M, the BIOS does * not always reset the secondary Nvidia GPU between reboots if the system -- 2.20.1