From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754075AbdBARxW (ORCPT ); Wed, 1 Feb 2017 12:53:22 -0500 Received: from mx0a-00082601.pphosted.com ([67.231.145.42]:50726 "EHLO mx0a-00082601.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753117AbdBARxT (ORCPT ); Wed, 1 Feb 2017 12:53:19 -0500 Smtp-Origin-Hostprefix: devbig From: Shaohua Li Smtp-Origin-Hostname: devbig638.prn2.facebook.com To: , CC: , , Smtp-Origin-Cluster: prn2c22 Subject: [PATCH V2 2/3] PCI: add an API to get node from vector Date: Wed, 1 Feb 2017 09:53:15 -0800 Message-ID: X-Mailer: git-send-email 2.9.3 In-Reply-To: References: X-FB-Internal: Safe MIME-Version: 1.0 Content-Type: text/plain X-Proofpoint-Spam-Reason: safe X-FB-Internal: Safe X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:,, definitions=2017-02-01_13:,, signatures=0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Next patch will use the API to get the node from vector for nvme device Signed-off-by: Shaohua Li --- drivers/pci/msi.c | 16 ++++++++++++++++ include/linux/pci.h | 6 ++++++ 2 files changed, 22 insertions(+) diff --git a/drivers/pci/msi.c b/drivers/pci/msi.c index 50c5003..ab7aee7 100644 --- a/drivers/pci/msi.c +++ b/drivers/pci/msi.c @@ -1313,6 +1313,22 @@ const struct cpumask *pci_irq_get_affinity(struct pci_dev *dev, int nr) } EXPORT_SYMBOL(pci_irq_get_affinity); +/** + * pci_irq_get_node - return the numa node of a particular msi vector + * @pdev: PCI device to operate on + * @vec: device-relative interrupt vector index (0-based). + */ +int pci_irq_get_node(struct pci_dev *pdev, int vec) +{ + const struct cpumask *mask; + + mask = pci_irq_get_affinity(pdev, vec); + if (mask) + return local_memory_node(cpu_to_node(cpumask_first(mask))); + return dev_to_node(&pdev->dev); +} +EXPORT_SYMBOL(pci_irq_get_node); + struct pci_dev *msi_desc_to_pci_dev(struct msi_desc *desc) { return to_pci_dev(desc->dev); diff --git a/include/linux/pci.h b/include/linux/pci.h index e2d1a12..df2c649 100644 --- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -1334,6 +1334,7 @@ int pci_alloc_irq_vectors_affinity(struct pci_dev *dev, unsigned int min_vecs, void pci_free_irq_vectors(struct pci_dev *dev); int pci_irq_vector(struct pci_dev *dev, unsigned int nr); const struct cpumask *pci_irq_get_affinity(struct pci_dev *pdev, int vec); +int pci_irq_get_node(struct pci_dev *pdev, int vec); #else static inline int pci_msi_vec_count(struct pci_dev *dev) { return -ENOSYS; } @@ -1384,6 +1385,11 @@ static inline const struct cpumask *pci_irq_get_affinity(struct pci_dev *pdev, { return cpu_possible_mask; } + +static inline int pci_irq_get_node(struct pci_dev *pdev, int vec) +{ + return first_online_node; +} #endif static inline int -- 2.9.3