From patchwork Thu Apr 6 10:36:35 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Sagi Grimberg X-Patchwork-Id: 9666813 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 17DF760365 for ; Thu, 6 Apr 2017 10:37:15 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 919C227FE4 for ; Thu, 6 Apr 2017 10:37:14 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 836B626223; Thu, 6 Apr 2017 10:37:14 +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 341E326E48 for ; Thu, 6 Apr 2017 10:37:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934503AbdDFKhG (ORCPT ); Thu, 6 Apr 2017 06:37:06 -0400 Received: from bombadil.infradead.org ([65.50.211.133]:59014 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S934490AbdDFKg7 (ORCPT ); Thu, 6 Apr 2017 06:36:59 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20170209; h=References:In-Reply-To:Message-Id: Date:Subject:Cc:To:From:Sender:Reply-To:MIME-Version:Content-Type: Content-Transfer-Encoding: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=qZCTdJiRIJV2yBZRGHe3OI21thaPNr/SIkokQQQcnTc=; b=uTCzd1VcjxNrJUiHL4ZhKH7/G hTriBEcyc5zjpkrHpUVLJ5UCkOqc2Mj2xWsX7LV6naeoSVWF9p92JLZikAmtU4vCpBnQHQ9yYUN0w WAcMcUS++CwUSlupTaBnIVr968WZo7tWPapf0NiNGJhUJAWp9k70dM3ILXVzf8owGKIlQq6bl/usv YI1bVtjbW+URgGhMJeEKYG9XIysGMmtBAnyHPYxGz2DAP5Tf5XMwhSL/4zGLAyNreiF+clSu+Fn7I EZ0EtZddKB88hD5AboxilSKu0wQ/aqm+iyjpHAulIDAK+XOcs9ja+Yz+doOEbwTp6yxF2ZE+ywkws GyDw83KFg==; 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 1cw4mZ-0002Aw-IG; Thu, 06 Apr 2017 10:36:52 +0000 From: Sagi Grimberg To: Jens Axboe , linux-nvme@lists.infradead.org, linux-block@vger.kernel.org, linux-rdma@vger.kernel.org Cc: Christoph Hellwig , Or Gerlitz , Saeed Mahameed , Leon Romanovsky Subject: [PATCH v2 3/6] RDMA/core: expose affinity mappings per completion vector Date: Thu, 6 Apr 2017 13:36:35 +0300 Message-Id: <1491474998-16423-4-git-send-email-sagi@grimberg.me> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1491474998-16423-1-git-send-email-sagi@grimberg.me> References: <1491474998-16423-1-git-send-email-sagi@grimberg.me> 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 Signed-off-by: Sagi Grimberg Acked-by: Doug Ledford Reviewed-by: Håkon Bugge --- include/rdma/ib_verbs.h | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h index 0f1813c13687..d44b62791c64 100644 --- a/include/rdma/ib_verbs.h +++ b/include/rdma/ib_verbs.h @@ -2150,6 +2150,8 @@ 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 { @@ -3377,4 +3379,26 @@ void ib_drain_qp(struct ib_qp *qp); int ib_resolve_eth_dmac(struct ib_device *device, struct ib_ah_attr *ah_attr); + +/** + * 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 > device->num_comp_vectors || + !device->get_vector_affinity) + return NULL; + + return device->get_vector_affinity(device, comp_vector); + +} + #endif /* IB_VERBS_H */