From patchwork Mon Jul 10 07:17:31 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Sagi Grimberg X-Patchwork-Id: 9832391 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 2ACAF60318 for ; Mon, 10 Jul 2017 07:18:20 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 6449C26256 for ; Mon, 10 Jul 2017 07:18:15 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 58B69283C4; Mon, 10 Jul 2017 07:18:15 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.8 required=2.0 tests=BAYES_00,DKIM_SIGNED, RCVD_IN_DNSWL_HI,T_DKIM_INVALID autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id AA1DE26256 for ; Mon, 10 Jul 2017 07:18:14 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752491AbdGJHSN (ORCPT ); Mon, 10 Jul 2017 03:18:13 -0400 Received: from bombadil.infradead.org ([65.50.211.133]:55765 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752486AbdGJHSN (ORCPT ); Mon, 10 Jul 2017 03:18:13 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20170209; h=Content-Transfer-Encoding: Content-Type:MIME-Version:References:In-Reply-To:Message-Id:Date:Subject:Cc: To:From:Sender:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id: List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=WD1wHR/imoHq+5nZt91V59IXTTdtQ2MBbFda63RpA+E=; b=qCBRetolaNgv5JPI8QOoKrN8J 8+eTi8zTGMNJmrFZ7iDRVqdJW0x+j01XoHD5C6lRi8FN3jaarxtAfMt6kyfyo/VuhoYV0ojqo+HDU zc4dtE464lb8yHTSnG8P0eU4eFoG45VtRSBRjU/SJxr99ePXSmrWPfVi/XFLvBBK63IFEM1chFjxK M0T27beD3+fO3cWNlq/jjwxzXd15hOejjlAlCLk7lXidJ3J4zEbXnNwC6+YW4iGidyb2LaHxLYE76 WgC7Gf9HTVLHOcxfu/uLi3ihGnvKElK9CSEsuNd/mt+O3u+ELN3xQj4f3q2SVTmBYS6Jh3K5VP6oO 13inCTnZQ==; Received: from bzq-82-81-101-184.red.bezeqint.net ([82.81.101.184] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtpsa (Exim 4.87 #1 (Red Hat Linux)) id 1dUSx1-0008H4-DE; Mon, 10 Jul 2017 07:17:47 +0000 From: Sagi Grimberg To: Doug Ledford , linux-rdma@vger.kernel.org Cc: linux-nvme@lists.infradead.org, Christoph Hellwig , Leon Romanovsky , Saeed Mahameed Subject: [PATCH v7 for-4.13 4/7] RDMA/core: expose affinity mappings per completion vector Date: Mon, 10 Jul 2017 10:17:31 +0300 Message-Id: <1499671054-23899-5-git-send-email-sagi@grimberg.me> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1499671054-23899-1-git-send-email-sagi@grimberg.me> References: <1499671054-23899-1-git-send-email-sagi@grimberg.me> MIME-Version: 1.0 Sender: linux-rdma-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-rdma@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP This will allow ULPs to intelligently locate threads based on completion vector cpu affinity mappings. In case the driver does not expose a get_vector_affinity callout, return NULL so the caller can maintain a fallback logic. Reviewed-by: Christoph Hellwig Reviewed-by: Håkon Bugge Acked-by: Doug Ledford Signed-off-by: Sagi Grimberg --- include/rdma/ib_verbs.h | 25 ++++++++++++++++++++++++- 1 file changed, 24 insertions(+), 1 deletion(-) diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h index 9d4d2a74c95e..8d5621cada90 100644 --- a/include/rdma/ib_verbs.h +++ b/include/rdma/ib_verbs.h @@ -2248,6 +2248,8 @@ struct ib_device { */ int (*get_port_immutable)(struct ib_device *, u8, struct ib_port_immutable *); void (*get_dev_fw_str)(struct ib_device *, char *str, size_t str_len); + const struct cpumask *(*get_vector_affinity)(struct ib_device *ibdev, + int comp_vector); }; struct ib_client { @@ -3612,7 +3614,6 @@ static inline void rdma_ah_set_interface_id(struct rdma_ah_attr *attr, grh->dgid.global.interface_id = if_id; } - static inline void rdma_ah_set_grh(struct rdma_ah_attr *attr, union ib_gid *dgid, u32 flow_label, u8 sgid_index, u8 hop_limit, @@ -3642,4 +3643,26 @@ static inline enum rdma_ah_attr_type rdma_ah_find_type(struct ib_device *dev, else return RDMA_AH_ATTR_TYPE_IB; } + +/** + * ib_get_vector_affinity - Get the affinity mappings of a given completion + * vector + * @device: the rdma device + * @comp_vector: index of completion vector + * + * Returns NULL on failure, otherwise a corresponding cpu map of the + * completion vector (returns all-cpus map if the device driver doesn't + * implement get_vector_affinity). + */ +static inline const struct cpumask * +ib_get_vector_affinity(struct ib_device *device, int comp_vector) +{ + if (comp_vector < 0 || comp_vector >= device->num_comp_vectors || + !device->get_vector_affinity) + return NULL; + + return device->get_vector_affinity(device, comp_vector); + +} + #endif /* IB_VERBS_H */