From patchwork Wed Oct 2 10:49:19 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alexander Gordeev X-Patchwork-Id: 279955 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by ozlabs.org (Postfix) with ESMTP id 758A62C04CA for ; Thu, 3 Oct 2013 03:26:11 +1000 (EST) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754867Ab3JBRZY (ORCPT ); Wed, 2 Oct 2013 13:25:24 -0400 Received: from 221-186-24-89.in-addr.arpa ([89.24.186.221]:26071 "EHLO dhcp-26-207.brq.redhat.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1754182Ab3JBRZV (ORCPT ); Wed, 2 Oct 2013 13:25:21 -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 r92AxUex002731; Wed, 2 Oct 2013 12:59:30 +0200 Received: (from agordeev@localhost) by dhcp-26-207.brq.redhat.com (8.14.5/8.14.5/Submit) id r92AxS4J002730; Wed, 2 Oct 2013 12:59:28 +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 63/77] qlcnic: Update MSI/MSI-X interrupts enablement code Date: Wed, 2 Oct 2013 12:49:19 +0200 Message-Id: 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 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/qlogic/qlcnic/qlcnic_main.c | 56 ++++++++++++--------- 1 files changed, 32 insertions(+), 24 deletions(-) diff --git a/drivers/net/ethernet/qlogic/qlcnic/qlcnic_main.c b/drivers/net/ethernet/qlogic/qlcnic/qlcnic_main.c index b94e679..a137c14 100644 --- a/drivers/net/ethernet/qlogic/qlcnic/qlcnic_main.c +++ b/drivers/net/ethernet/qlogic/qlcnic/qlcnic_main.c @@ -590,7 +590,37 @@ int qlcnic_enable_msix(struct qlcnic_adapter *adapter, u32 num_msix) adapter->flags &= ~(QLCNIC_MSI_ENABLED | QLCNIC_MSIX_ENABLED); if (adapter->ahw->msix_supported) { - enable_msix: + err = pci_msix_table_size(pdev); + if (err < 0) + goto fail; + + if (err < num_msix) { + dev_info(&pdev->dev, + "Unable to allocate %d MSI-X interrupt vectors\n", + num_msix); + if (qlcnic_83xx_check(adapter)) { + if (err < (QLC_83XX_MINIMUM_VECTOR - tx_vector)) + return -ENOSPC; + err -= (max_tx_rings + 1); + num_msix = rounddown_pow_of_two(err); + num_msix += (max_tx_rings + 1); + } else { + num_msix = rounddown_pow_of_two(err); + if (qlcnic_check_multi_tx(adapter)) + num_msix += max_tx_rings; + } + + if (!num_msix) { + err = -ENOSPC; + goto fail; + } + + dev_info(&pdev->dev, + "Trying to allocate %d MSI-X interrupt vectors\n", + num_msix); + } + } + for (i = 0; i < num_msix; i++) adapter->msix_entries[i].entry = i; err = pci_enable_msix(pdev, adapter->msix_entries, num_msix); @@ -613,30 +643,8 @@ int qlcnic_enable_msix(struct qlcnic_adapter *adapter, u32 num_msix) adapter->max_sds_rings = max_sds_rings; } dev_info(&pdev->dev, "using msi-x interrupts\n"); - } else if (err > 0) { - dev_info(&pdev->dev, - "Unable to allocate %d MSI-X interrupt vectors\n", - num_msix); - if (qlcnic_83xx_check(adapter)) { - if (err < (QLC_83XX_MINIMUM_VECTOR - tx_vector)) - return -ENOSPC; - err -= (max_tx_rings + 1); - num_msix = rounddown_pow_of_two(err); - num_msix += (max_tx_rings + 1); - } else { - num_msix = rounddown_pow_of_two(err); - if (qlcnic_check_multi_tx(adapter)) - num_msix += max_tx_rings; - } - - if (num_msix) { - dev_info(&pdev->dev, - "Trying to allocate %d MSI-X interrupt vectors\n", - num_msix); - goto enable_msix; - } - err = -ENOSPC; } else { +fail: dev_info(&pdev->dev, "Unable to allocate %d MSI-X interrupt vectors\n", num_msix);