From patchwork Wed Oct 2 10:48:37 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alexander Gordeev X-Patchwork-Id: 2976241 X-Patchwork-Delegate: bhelgaas@google.com Return-Path: X-Original-To: patchwork-linux-pci@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 B30D5BFF0B for ; Wed, 2 Oct 2013 16:52:18 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 93D70203AE for ; Wed, 2 Oct 2013 16:52:17 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 7C7552038C for ; Wed, 2 Oct 2013 16:52:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754290Ab3JBQvr (ORCPT ); Wed, 2 Oct 2013 12:51:47 -0400 Received: from 221-186-24-89.in-addr.arpa ([89.24.186.221]:24846 "EHLO dhcp-26-207.brq.redhat.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1754770Ab3JBQvp (ORCPT ); Wed, 2 Oct 2013 12:51:45 -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 r92AsWZl002483; Wed, 2 Oct 2013 12:54:33 +0200 Received: (from agordeev@localhost) by dhcp-26-207.brq.redhat.com (8.14.5/8.14.5/Submit) id r92AsP3r002482; Wed, 2 Oct 2013 12:54:25 +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 21/77] csiostor: Update MSI/MSI-X interrupts enablement code Date: Wed, 2 Oct 2013 12:48:37 +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 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=ham 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/scsi/csiostor/csio_isr.c | 18 ++++++++++++------ 1 files changed, 12 insertions(+), 6 deletions(-) diff --git a/drivers/scsi/csiostor/csio_isr.c b/drivers/scsi/csiostor/csio_isr.c index abf20ab..b8a840e 100644 --- a/drivers/scsi/csiostor/csio_isr.c +++ b/drivers/scsi/csiostor/csio_isr.c @@ -512,6 +512,16 @@ csio_enable_msix(struct csio_hw *hw) if (hw->flags & CSIO_HWF_USING_SOFT_PARAMS || !csio_is_hw_master(hw)) cnt = min_t(uint8_t, hw->cfg_niq, cnt); + rv = pci_msix_table_size(hw->pdev); + if (rv < 0) + return rv; + + cnt = min(cnt, rv); + if (cnt < min) { + csio_info(hw, "Not using MSI-X, remainder:%d\n", rv); + return -ENOSPC; + } + entries = kzalloc(sizeof(struct msix_entry) * cnt, GFP_KERNEL); if (!entries) return -ENOMEM; @@ -521,19 +531,15 @@ csio_enable_msix(struct csio_hw *hw) csio_dbg(hw, "FW supp #niq:%d, trying %d msix's\n", hw->cfg_niq, cnt); - while ((rv = pci_enable_msix(hw->pdev, entries, cnt)) >= min) - cnt = rv; + rv = pci_enable_msix(hw->pdev, entries, cnt); if (!rv) { if (cnt < (hw->num_sqsets + extra)) { csio_dbg(hw, "Reducing sqsets to %d\n", cnt - extra); csio_reduce_sqsets(hw, cnt - extra); } } else { - if (rv > 0) - csio_info(hw, "Not using MSI-X, remainder:%d\n", rv); - kfree(entries); - return -ENOSPC; + return rv; } /* Save off vectors */