From patchwork Wed Oct 2 10:49:22 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alexander Gordeev X-Patchwork-Id: 279939 Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Received: from ozlabs.org (localhost [IPv6:::1]) by ozlabs.org (Postfix) with ESMTP id D0C992C0520 for ; Thu, 3 Oct 2013 03:20:29 +1000 (EST) Received: from dhcp-26-207.brq.redhat.com (unknown [89.24.186.221]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client did not present a certificate) by ozlabs.org (Postfix) with ESMTPS id 28A4F2C00A2 for ; Thu, 3 Oct 2013 03:19:50 +1000 (EST) 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 r92AxfE0002743; Wed, 2 Oct 2013 12:59:41 +0200 Received: (from agordeev@localhost) by dhcp-26-207.brq.redhat.com (8.14.5/8.14.5/Submit) id r92Axdfq002742; Wed, 2 Oct 2013 12:59:39 +0200 From: Alexander Gordeev To: linux-kernel@vger.kernel.org Subject: [PATCH RFC 66/77] qlge: Update MSI/MSI-X interrupts enablement code Date: Wed, 2 Oct 2013 12:49:22 +0200 Message-Id: <5161bfdf162c8edd77d03e96312d48edb54242bc.1380703263.git.agordeev@redhat.com> X-Mailer: git-send-email 1.7.7.6 In-Reply-To: References: Cc: linux-mips@linux-mips.org, "VMware, Inc." , linux-nvme@lists.infradead.org, linux-ide@vger.kernel.org, linux-s390@vger.kernel.org, Andy King , linux-scsi@vger.kernel.org, linux-rdma@vger.kernel.org, x86@kernel.org, Alexander Gordeev , linux-pci@vger.kernel.org, iss_storagedev@hp.com, linux-driver@qlogic.com, Tejun Heo , Bjorn Helgaas , Dan Williams , Jon Mason , Ingo Molnar , Solarflare linux maintainers , netdev@vger.kernel.org, Ralf Baechle , e1000-devel@lists.sourceforge.net, Martin Schwidefsky , linux390@de.ibm.com, linuxppc-dev@lists.ozlabs.org X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.16rc2 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" 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/qlge/qlge_main.c | 39 +++++++++++-------------- 1 files changed, 17 insertions(+), 22 deletions(-) diff --git a/drivers/net/ethernet/qlogic/qlge/qlge_main.c b/drivers/net/ethernet/qlogic/qlge/qlge_main.c index ac54cb0..d6fdd93 100644 --- a/drivers/net/ethernet/qlogic/qlge/qlge_main.c +++ b/drivers/net/ethernet/qlogic/qlge/qlge_main.c @@ -3258,45 +3258,40 @@ static void ql_enable_msix(struct ql_adapter *qdev) /* Get the MSIX vectors. */ if (qlge_irq_type == MSIX_IRQ) { + err = pci_msix_table_size(qdev->pdev); + if (err < 0) + goto msix_fail; + + qdev->intr_count = min_t(u32, qdev->intr_count, err); + /* Try to alloc space for the msix struct, * if it fails then go to MSI/legacy. */ qdev->msi_x_entry = kcalloc(qdev->intr_count, sizeof(struct msix_entry), GFP_KERNEL); - if (!qdev->msi_x_entry) { - qlge_irq_type = MSI_IRQ; - goto msi; - } + if (!qdev->msi_x_entry) + goto msix_fail; for (i = 0; i < qdev->intr_count; i++) qdev->msi_x_entry[i].entry = i; - /* Loop to get our vectors. We start with - * what we want and settle for what we get. - */ - do { - err = pci_enable_msix(qdev->pdev, - qdev->msi_x_entry, qdev->intr_count); - if (err > 0) - qdev->intr_count = err; - } while (err > 0); - - if (err < 0) { - kfree(qdev->msi_x_entry); - qdev->msi_x_entry = NULL; - netif_warn(qdev, ifup, qdev->ndev, - "MSI-X Enable failed, trying MSI.\n"); - qlge_irq_type = MSI_IRQ; - } else if (err == 0) { + if (!pci_enable_msix(qdev->pdev, + qdev->msi_x_entry, qdev->intr_count)) { set_bit(QL_MSIX_ENABLED, &qdev->flags); netif_info(qdev, ifup, qdev->ndev, "MSI-X Enabled, got %d vectors.\n", qdev->intr_count); return; } + + kfree(qdev->msi_x_entry); + qdev->msi_x_entry = NULL; +msix_fail: + netif_warn(qdev, ifup, qdev->ndev, + "MSI-X Enable failed, trying MSI.\n"); + qlge_irq_type = MSI_IRQ; } -msi: qdev->intr_count = 1; if (qlge_irq_type == MSI_IRQ) { if (!pci_enable_msi(qdev->pdev)) {