From patchwork Tue Oct 31 22:39:20 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Niklas Cassel X-Patchwork-Id: 10035621 X-Patchwork-Delegate: bhelgaas@google.com Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 287BD602B5 for ; Tue, 31 Oct 2017 22:46:13 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 1A64028B19 for ; Tue, 31 Oct 2017 22:46:13 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 0D0D928B21; Tue, 31 Oct 2017 22:46:13 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 78C3528AFF for ; Tue, 31 Oct 2017 22:46:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753797AbdJaWjp (ORCPT ); Tue, 31 Oct 2017 18:39:45 -0400 Received: from bastet.se.axis.com ([195.60.68.11]:52247 "EHLO bastet.se.axis.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753866AbdJaWjm (ORCPT ); Tue, 31 Oct 2017 18:39:42 -0400 Received: from localhost (localhost [127.0.0.1]) by bastet.se.axis.com (Postfix) with ESMTP id 61BF118416; Tue, 31 Oct 2017 23:39:41 +0100 (CET) X-Virus-Scanned: Debian amavisd-new at bastet.se.axis.com Received: from bastet.se.axis.com ([IPv6:::ffff:127.0.0.1]) by localhost (bastet.se.axis.com [::ffff:127.0.0.1]) (amavisd-new, port 10024) with LMTP id khhQhiJZcwHH; Tue, 31 Oct 2017 23:39:39 +0100 (CET) Received: from boulder02.se.axis.com (boulder02.se.axis.com [10.0.8.16]) by bastet.se.axis.com (Postfix) with ESMTPS id 5A10B18735; Tue, 31 Oct 2017 23:39:39 +0100 (CET) Received: from boulder02.se.axis.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 496BB1A09A; Tue, 31 Oct 2017 23:39:39 +0100 (CET) Received: from boulder02.se.axis.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 3E2D91A091; Tue, 31 Oct 2017 23:39:39 +0100 (CET) Received: from thoth.se.axis.com (unknown [10.0.2.173]) by boulder02.se.axis.com (Postfix) with ESMTP; Tue, 31 Oct 2017 23:39:39 +0100 (CET) Received: from lnxartpec1.se.axis.com (lnxartpec1.se.axis.com [10.88.4.10]) by thoth.se.axis.com (Postfix) with ESMTP id 324F2235F; Tue, 31 Oct 2017 23:39:39 +0100 (CET) Received: by lnxartpec1.se.axis.com (Postfix, from userid 20283) id 2D53540101; Tue, 31 Oct 2017 23:39:39 +0100 (CET) From: Niklas Cassel To: Jingoo Han , Joao Pinto , Bjorn Helgaas Cc: Niklas Cassel , linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v3 02/17] PCI: designware-ep: dw_pcie_ep_set_msi() should only set MMC bits Date: Tue, 31 Oct 2017 23:39:20 +0100 Message-Id: <20171031223936.27549-3-niklas.cassel@axis.com> X-Mailer: git-send-email 2.14.2 In-Reply-To: <20171031223936.27549-1-niklas.cassel@axis.com> References: <20171031223936.27549-1-niklas.cassel@axis.com> X-TM-AS-GCONF: 00 Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Previously, dw_pcie_ep_set_msi() wrote all bits in the Message Control register, thus overwriting the PCI_MSI_FLAGS_64BIT bit. By clearing the PCI_MSI_FLAGS_64BIT bit, we break MSI on systems where the RC has set a 64 bit MSI address. Signed-off-by: Niklas Cassel --- V3: * No change. drivers/pci/dwc/pcie-designware-ep.c | 4 +++- drivers/pci/dwc/pcie-designware.h | 1 + 2 files changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/pci/dwc/pcie-designware-ep.c b/drivers/pci/dwc/pcie-designware-ep.c index d53d5f168363..c92ab87fd660 100644 --- a/drivers/pci/dwc/pcie-designware-ep.c +++ b/drivers/pci/dwc/pcie-designware-ep.c @@ -220,7 +220,9 @@ static int dw_pcie_ep_set_msi(struct pci_epc *epc, u8 encode_int) struct dw_pcie_ep *ep = epc_get_drvdata(epc); struct dw_pcie *pci = to_dw_pcie_from_ep(ep); - val = (encode_int << MSI_CAP_MMC_SHIFT); + val = dw_pcie_readw_dbi(pci, MSI_MESSAGE_CONTROL); + val &= ~MSI_CAP_MMC_MASK; + val |= (encode_int << MSI_CAP_MMC_SHIFT) & MSI_CAP_MMC_MASK; dw_pcie_writew_dbi(pci, MSI_MESSAGE_CONTROL, val); return 0; diff --git a/drivers/pci/dwc/pcie-designware.h b/drivers/pci/dwc/pcie-designware.h index ecdede68522a..9aaf0cd04dd6 100644 --- a/drivers/pci/dwc/pcie-designware.h +++ b/drivers/pci/dwc/pcie-designware.h @@ -101,6 +101,7 @@ #define MSI_MESSAGE_CONTROL 0x52 #define MSI_CAP_MMC_SHIFT 1 +#define MSI_CAP_MMC_MASK (7 << MSI_CAP_MMC_SHIFT) #define MSI_CAP_MME_SHIFT 4 #define MSI_CAP_MME_MASK (7 << MSI_CAP_MME_SHIFT) #define MSI_MESSAGE_ADDR_L32 0x54