From patchwork Thu Apr 16 08:14:09 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Michael Wang X-Patchwork-Id: 6224751 Return-Path: X-Original-To: patchwork-linux-rdma@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 839E5BF4A6 for ; Thu, 16 Apr 2015 08:14:55 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 98A40202E9 for ; Thu, 16 Apr 2015 08:14:54 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id A06B620270 for ; Thu, 16 Apr 2015 08:14:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933887AbbDPIOa (ORCPT ); Thu, 16 Apr 2015 04:14:30 -0400 Received: from mail-wi0-f177.google.com ([209.85.212.177]:33169 "EHLO mail-wi0-f177.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933692AbbDPIOM (ORCPT ); Thu, 16 Apr 2015 04:14:12 -0400 Received: by wiax7 with SMTP id x7so5784875wia.0 for ; Thu, 16 Apr 2015 01:14:11 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:message-id:date:from:user-agent:mime-version:to :cc:subject:references:in-reply-to:content-type :content-transfer-encoding; bh=l4rGFkULn7KWYk8dDcTEbPsjxYgZst/7WcA1MH9QMW0=; b=SiJaRpAIDyPgWrVTvGYgWpu8lJJHvrwFPRU+lvDNe4iF71cBdloWTIBEPibYM3KR6T liuu9nBvcNjQJsNDtbViLVjeRDLdqVc10ui9M47LU4fxzfHP++QjqqK8oDPU2qMQEzw2 wIfXyb642N/Uy0Ztt4X3SQ796xMz8WRUNbIFZzAnfFlvfYxNf9D+DfrSz0/HV6IHYmJn sszCaYj3gztzZB77YFl1wdkbCp/me05XjJJw1UJrNcMDrebMDECFK+OdYsU7ytmS2Z78 Io+TzKqtzvqLcfOGR9niBLqSUt0jUhmLY+ZvJB1142joPNxf/IPF1mAdq0ywJudUzmKh RwCw== X-Gm-Message-State: ALoCoQnVVO6GfZxNNNEVRvt+4CgdtIy5p+Gj76k8O1rgqxiwfktFumxOR3D+RAc7hZJpXj5lSHug X-Received: by 10.180.103.231 with SMTP id fz7mr5404210wib.35.1429172051419; Thu, 16 Apr 2015 01:14:11 -0700 (PDT) Received: from [192.168.71.52] ([62.217.45.26]) by mx.google.com with ESMTPSA id gs7sm24928990wib.10.2015.04.16.01.14.09 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 16 Apr 2015 01:14:10 -0700 (PDT) Message-ID: <552F6F51.8080508@profitbricks.com> Date: Thu, 16 Apr 2015 10:14:09 +0200 From: Michael Wang User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.6.0 MIME-Version: 1.0 To: Roland Dreier , Sean Hefty , Hal Rosenstock , linux-rdma@vger.kernel.org, linux-kernel@vger.kernel.org CC: Tom Tucker , Steve Wise , Hoang-Nam Nguyen , Christoph Raisch , Mike Marciniszyn , Eli Cohen , Faisal Latif , Jack Morgenstein , Or Gerlitz , Haggai Eran , Ira Weiny , Tom Talpey , Jason Gunthorpe , Doug Ledford , hal@dev.mellanox.co.il, Michael Wang Subject: [PATCH v4 23/27] IB/Verbs: Use management helper cap_read_multi_sge() References: <552F6CF2.4000606@profitbricks.com> In-Reply-To: <552F6CF2.4000606@profitbricks.com> Sender: linux-rdma-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-rdma@vger.kernel.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable 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 Introduce helper cap_read_multi_sge() to help us check if the port of an IB device support RDMA Read Multiple Scatter-Gather Entries. Cc: Steve Wise Cc: Tom Talpey Cc: Jason Gunthorpe Cc: Doug Ledford Cc: Ira Weiny Cc: Sean Hefty Signed-off-by: Michael Wang --- include/rdma/ib_verbs.h | 15 +++++++++++++++ net/sunrpc/xprtrdma/svc_rdma_recvfrom.c | 3 ++- 2 files changed, 17 insertions(+), 1 deletion(-) diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h index ac62b3a..60f7efb 100644 --- a/include/rdma/ib_verbs.h +++ b/include/rdma/ib_verbs.h @@ -1878,6 +1878,21 @@ static inline int cap_ipoib(struct ib_device *device, u8 port_num) return rdma_tech_ib(device, port_num); } +/** + * cap_read_multi_sge - Check if the port of device has the capability + * RDMA Read Multiple Scatter-Gather Entries. + * + * @device: Device to be checked + * @port_num: Port number of the device + * + * Return 0 when port of the device don't support + * RDMA Read Multiple Scatter-Gather Entries. + */ +static inline int cap_read_multi_sge(struct ib_device *device, u8 port_num) +{ + return !rdma_tech_iwarp(device, port_num); +} + int ib_query_gid(struct ib_device *device, u8 port_num, int index, union ib_gid *gid); diff --git a/net/sunrpc/xprtrdma/svc_rdma_recvfrom.c b/net/sunrpc/xprtrdma/svc_rdma_recvfrom.c index a5bed5b..7711b7a 100644 --- a/net/sunrpc/xprtrdma/svc_rdma_recvfrom.c +++ b/net/sunrpc/xprtrdma/svc_rdma_recvfrom.c @@ -117,7 +117,8 @@ static void rdma_build_arg_xdr(struct svc_rqst *rqstp, static int rdma_read_max_sge(struct svcxprt_rdma *xprt, int sge_count) { - if (rdma_tech_iwarp(xprt->sc_cm_id->device, xprt->sc_cm_id->port_num)) + if (!cap_read_multi_sge(xprt->sc_cm_id->device, + xprt->sc_cm_id->port_num)) return 1; else return min_t(int, sge_count, xprt->sc_max_sge);