From patchwork Wed Oct 2 10:49:07 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alexander Gordeev X-Patchwork-Id: 2975921 Return-Path: X-Original-To: patchwork-linux-rdma@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork2.web.kernel.org (Postfix) with ESMTP id ADDDEBFF0B for ; Wed, 2 Oct 2013 16:36:38 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id A55D020437 for ; Wed, 2 Oct 2013 16:36:37 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 1454220445 for ; Wed, 2 Oct 2013 16:36:32 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754063Ab3JBQg0 (ORCPT ); Wed, 2 Oct 2013 12:36:26 -0400 Received: from 221-186-24-89.in-addr.arpa ([89.24.186.221]:24664 "EHLO dhcp-26-207.brq.redhat.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1753527Ab3JBQgY (ORCPT ); Wed, 2 Oct 2013 12:36:24 -0400 Received: from dhcp-26-207.brq.redhat.com (localhost [127.0.0.1]) by dhcp-26-207.brq.redhat.com (8.14.5/8.14.5) with ESMTP id r92AwfJO002670; Wed, 2 Oct 2013 12:58:41 +0200 Received: (from agordeev@localhost) by dhcp-26-207.brq.redhat.com (8.14.5/8.14.5/Submit) id r92Awc2t002669; Wed, 2 Oct 2013 12:58:38 +0200 From: Alexander Gordeev To: linux-kernel@vger.kernel.org Cc: Alexander Gordeev , Bjorn Helgaas , Ralf Baechle , Michael Ellerman , Benjamin Herrenschmidt , Martin Schwidefsky , Ingo Molnar , Tejun Heo , Dan Williams , Andy King , Jon Mason , Matt Porter , linux-pci@vger.kernel.org, linux-mips@linux-mips.org, linuxppc-dev@lists.ozlabs.org, linux390@de.ibm.com, linux-s390@vger.kernel.org, x86@kernel.org, linux-ide@vger.kernel.org, iss_storagedev@hp.com, linux-nvme@lists.infradead.org, linux-rdma@vger.kernel.org, netdev@vger.kernel.org, e1000-devel@lists.sourceforge.net, linux-driver@qlogic.com, Solarflare linux maintainers , "VMware, Inc." , linux-scsi@vger.kernel.org Subject: [PATCH RFC 51/77] mthca: Update MSI/MSI-X interrupts enablement code Date: Wed, 2 Oct 2013 12:49:07 +0200 Message-Id: <9d424912ef78993dc75e2af5006cd12913e9e7e7.1380703263.git.agordeev@redhat.com> X-Mailer: git-send-email 1.7.7.6 In-Reply-To: References: Sender: linux-rdma-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-rdma@vger.kernel.org X-Spam-Status: No, score=-4.2 required=5.0 tests=BAYES_00,KHOP_BIG_TO_CC, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP As result of recent re-design of the MSI/MSI-X interrupts enabling pattern this driver has to be updated to use the new technique to obtain a optimal number of MSI/MSI-X interrupts required. Signed-off-by: Alexander Gordeev --- drivers/infiniband/hw/mthca/mthca_main.c | 16 +++++++++++----- 1 files changed, 11 insertions(+), 5 deletions(-) diff --git a/drivers/infiniband/hw/mthca/mthca_main.c b/drivers/infiniband/hw/mthca/mthca_main.c index 87897b9..3d44ca4 100644 --- a/drivers/infiniband/hw/mthca/mthca_main.c +++ b/drivers/infiniband/hw/mthca/mthca_main.c @@ -854,17 +854,23 @@ static int mthca_enable_msi_x(struct mthca_dev *mdev) struct msix_entry entries[3]; int err; + err = pci_msix_table_size(mdev->pdev); + if (err < 0) + return err; + if (err < ARRAY_SIZE(entries)) { + mthca_info(mdev, "Only %d MSI-X vectors available, " + "not using MSI-X\n", err); + + return -ENOSPC; + } + entries[0].entry = 0; entries[1].entry = 1; entries[2].entry = 2; err = pci_enable_msix(mdev->pdev, entries, ARRAY_SIZE(entries)); - if (err) { - if (err > 0) - mthca_info(mdev, "Only %d MSI-X vectors available, " - "not using MSI-X\n", err); + if (err) return err; - } mdev->eq_table.eq[MTHCA_EQ_COMP ].msi_x_vector = entries[0].vector; mdev->eq_table.eq[MTHCA_EQ_ASYNC].msi_x_vector = entries[1].vector;