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=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham 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 475DCC2BA83 for ; Fri, 14 Feb 2020 18:10:13 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 11FAD2168B for ; Fri, 14 Feb 2020 18:10:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1581703813; bh=Nst9ebLRaE3NHXB6enkxe0pAhC967ktXa0/Y8kcJryM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=xxAjsUyxE1Q4+xFuXqPP1IWjMzItIAkUCXlaSkgrCRxnYFf20/sZj0nL2thu9rBzD G/9KWIZL0selQRLjuFRmdvtQl/0Y9Bc42GKMI9uGduL5Oq+cWChdG+OHgorCcplDy+ SR/tkuzEYZaJSA0VHheqz67ZsgoWfbIRnGyfS3TM= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2403793AbgBNSKM (ORCPT ); Fri, 14 Feb 2020 13:10:12 -0500 Received: from mail.kernel.org ([198.145.29.99]:33246 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730625AbgBNPxr (ORCPT ); Fri, 14 Feb 2020 10:53:47 -0500 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 2876E24673; Fri, 14 Feb 2020 15:53:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1581695626; bh=Nst9ebLRaE3NHXB6enkxe0pAhC967ktXa0/Y8kcJryM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=STR/sTvcOG4aW1cJXdIS8++wLS/gUL1EZtiEjH6mywJUnKjPknhFazI0/BsKVlz6v hW0mLlN5Cy7cu3J8/KD++IoI4zBTgeBt5kqf9HZl2HgibtKaX0DY1/EZU/JmvKPUMu 8eAaIra4I/4BLeKHyZ7QuQp1eCLxsZriSNZKyGLI= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: James Sewart , Bjorn Helgaas , Logan Gunthorpe , Sasha Levin , linux-pci@vger.kernel.org Subject: [PATCH AUTOSEL 5.5 225/542] PCI: Add DMA alias quirk for PLX PEX NTB Date: Fri, 14 Feb 2020 10:43:37 -0500 Message-Id: <20200214154854.6746-225-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200214154854.6746-1-sashal@kernel.org> References: <20200214154854.6746-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore 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 9aa590eb712fe..83953752337c4 100644 --- a/drivers/pci/quirks.c +++ b/drivers/pci/quirks.c @@ -5371,6 +5371,21 @@ 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