Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S965259Ab3IEMv3 (ORCPT ); Thu, 5 Sep 2013 08:51:29 -0400 Received: from mx1.redhat.com ([209.132.183.28]:57022 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1763374Ab3IEMv1 (ORCPT ); Thu, 5 Sep 2013 08:51:27 -0400 Date: Thu, 5 Sep 2013 14:53:19 +0200 From: Alexander Gordeev To: linux-kernel@vger.kernel.org Cc: x86@kernel.org, linux-pci@vger.kernel.org, linux-ide@vger.kernel.org, Tejun Heo , Ingo Molnar , Joerg Roedel , Jan Beulich , Bjorn Helgaas Subject: [PATCH v2 3/6] MSI/x86: Support pci_enable_msi_block_part() interface Message-ID: <1519938bbcfd083c0e091e5ac69b573c39664e40.1378383792.git.agordeev@redhat.com> References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2295 Lines: 70 This change is a prerequisite for the forthcoming update of the AHCI device driver to conserve 10/16 MSIs on Intel chipsets. The update makes use of 'nvec_mme' parameter for pci_enable_msi_block_part() interface. Signed-off-by: Alexander Gordeev --- drivers/iommu/irq_remapping.c | 12 ++++++------ 1 files changed, 6 insertions(+), 6 deletions(-) diff --git a/drivers/iommu/irq_remapping.c b/drivers/iommu/irq_remapping.c index 1a220a0..7671da3 100644 --- a/drivers/iommu/irq_remapping.c +++ b/drivers/iommu/irq_remapping.c @@ -49,9 +49,9 @@ static void irq_remapping_disable_io_apic(void) disconnect_bsp_APIC(0); } -static int do_setup_msi_irqs(struct pci_dev *dev, int nvec) +static int do_setup_msi_irqs(struct pci_dev *dev, int nvec, int nvec_mme) { - int node, ret, sub_handle, nvec_pow2, index = 0; + int node, ret, sub_handle, index = 0; unsigned int irq; struct msi_desc *msidesc; @@ -60,18 +60,18 @@ static int do_setup_msi_irqs(struct pci_dev *dev, int nvec) WARN_ON(msidesc->irq); WARN_ON(msidesc->msi_attrib.multiple); WARN_ON(msidesc->nvec_used); + BUG_ON(!is_power_of_2(nvec_mme)); node = dev_to_node(&dev->dev); irq = __create_irqs(get_nr_irqs_gsi(), nvec, node); if (irq == 0) return -ENOSPC; - nvec_pow2 = __roundup_pow_of_two(nvec); msidesc->nvec_used = nvec; - msidesc->msi_attrib.multiple = ilog2(nvec_pow2); + msidesc->msi_attrib.multiple = ilog2(nvec_mme); for (sub_handle = 0; sub_handle < nvec; sub_handle++) { if (!sub_handle) { - index = msi_alloc_remapped_irq(dev, irq, nvec_pow2); + index = msi_alloc_remapped_irq(dev, irq, nvec_mme); if (index < 0) { ret = index; goto error; @@ -145,7 +145,7 @@ static int irq_remapping_setup_msi_irqs(struct pci_dev *dev, int nvec, int nvec_mme, int type) { if (type == PCI_CAP_ID_MSI) - return do_setup_msi_irqs(dev, nvec); + return do_setup_msi_irqs(dev, nvec, nvec_mme); else return do_setup_msix_irqs(dev, nvec); } -- 1.7.7.6 -- Regards, Alexander Gordeev agordeev@redhat.com -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/