From patchwork Wed Oct 2 10:49:25 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alexander Gordeev X-Patchwork-Id: 2976481 X-Patchwork-Delegate: bhelgaas@google.com Return-Path: X-Original-To: patchwork-linux-pci@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork1.web.kernel.org (Postfix) with ESMTP id A54BF9F288 for ; Wed, 2 Oct 2013 17:04:45 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 9884F20383 for ; Wed, 2 Oct 2013 17:04:44 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 738E020353 for ; Wed, 2 Oct 2013 17:04:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754456Ab3JBREX (ORCPT ); Wed, 2 Oct 2013 13:04:23 -0400 Received: from 221-186-24-89.in-addr.arpa ([89.24.186.221]:25621 "EHLO dhcp-26-207.brq.redhat.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1754340Ab3JBREV (ORCPT ); Wed, 2 Oct 2013 13:04:21 -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 r92B00Cr002763; Wed, 2 Oct 2013 13:00:01 +0200 Received: (from agordeev@localhost) by dhcp-26-207.brq.redhat.com (8.14.5/8.14.5/Submit) id r92Axqf1002754; Wed, 2 Oct 2013 12:59:52 +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 69/77] tg3: Update MSI/MSI-X interrupts enablement code Date: Wed, 2 Oct 2013 12:49:25 +0200 Message-Id: <7439a70d0bb225702097714d92df2169ffd94dd6.1380703263.git.agordeev@redhat.com> X-Mailer: git-send-email 1.7.7.6 In-Reply-To: References: Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@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/net/ethernet/broadcom/tg3.c | 24 +++++++++++++----------- 1 files changed, 13 insertions(+), 11 deletions(-) diff --git a/drivers/net/ethernet/broadcom/tg3.c b/drivers/net/ethernet/broadcom/tg3.c index 12d961c..2e842ef3 100644 --- a/drivers/net/ethernet/broadcom/tg3.c +++ b/drivers/net/ethernet/broadcom/tg3.c @@ -11241,6 +11241,10 @@ static bool tg3_enable_msix(struct tg3 *tp) int i, rc; struct msix_entry msix_ent[TG3_IRQ_MAX_VECS]; + rc = pci_msix_table_size(tp->pdev); + if (rc < 0) + return false; + tp->txq_cnt = tp->txq_req; tp->rxq_cnt = tp->rxq_req; if (!tp->rxq_cnt) @@ -11256,6 +11260,14 @@ static bool tg3_enable_msix(struct tg3 *tp) tp->txq_cnt = 1; tp->irq_cnt = tg3_irq_count(tp); + if (tp->irq_cnt > rc) { + netdev_notice(tp->dev, "Requested %d MSI-Xs, available %d\n", + tp->irq_cnt, rc); + tp->irq_cnt = rc; + tp->rxq_cnt = max(rc - 1, 1); + if (tp->txq_cnt) + tp->txq_cnt = min(tp->rxq_cnt, tp->txq_max); + } for (i = 0; i < tp->irq_max; i++) { msix_ent[i].entry = i; @@ -11263,18 +11275,8 @@ static bool tg3_enable_msix(struct tg3 *tp) } rc = pci_enable_msix(tp->pdev, msix_ent, tp->irq_cnt); - if (rc < 0) { + if (rc) return false; - } else if (rc != 0) { - if (pci_enable_msix(tp->pdev, msix_ent, rc)) - return false; - netdev_notice(tp->dev, "Requested %d MSI-X vectors, received %d\n", - tp->irq_cnt, rc); - tp->irq_cnt = rc; - tp->rxq_cnt = max(rc - 1, 1); - if (tp->txq_cnt) - tp->txq_cnt = min(tp->rxq_cnt, tp->txq_max); - } for (i = 0; i < tp->irq_max; i++) tp->napi[i].irq_vec = msix_ent[i].vector;