Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1030537AbbD1PLZ (ORCPT ); Tue, 28 Apr 2015 11:11:25 -0400 Received: from mail-wg0-f52.google.com ([74.125.82.52]:34002 "EHLO mail-wg0-f52.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S965983AbbD1PLM (ORCPT ); Tue, 28 Apr 2015 11:11:12 -0400 From: Michael Wang To: Roland Dreier , Sean Hefty , Hal Rosenstock , linux-rdma@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Michael Wang , Steve Wise , Tom Talpey , Jason Gunthorpe , Doug Ledford , Ira Weiny , Tom Tucker , Hoang-Nam Nguyen , Christoph Raisch , Mike Marciniszyn , Eli Cohen , Faisal Latif , Jack Morgenstein , Or Gerlitz , Haggai Eran , Devesh Sharma , Liran Liss , Dave Goodell Subject: [PATCH v7 21/23] IB/Verbs: Use management helper cap_read_multi_sge() Date: Tue, 28 Apr 2015 17:10:21 +0200 Message-Id: <1430233823-7075-22-git-send-email-yun.wang@profitbricks.com> X-Mailer: git-send-email 2.1.0 In-Reply-To: <1430233823-7075-1-git-send-email-yun.wang@profitbricks.com> References: <1430233823-7075-1-git-send-email-yun.wang@profitbricks.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2249 Lines: 63 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: Hal Rosenstock 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 | 2 +- 2 files changed, 16 insertions(+), 1 deletion(-) diff --git a/include/rdma/ib_verbs.h b/include/rdma/ib_verbs.h index dde2aa9..cca0293 100644 --- a/include/rdma/ib_verbs.h +++ b/include/rdma/ib_verbs.h @@ -1864,6 +1864,21 @@ static inline int cap_ib_mcast(struct ib_device *device, u8 port_num) return cap_ib_sa(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_protocol_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 2cc625d..7711b7a 100644 --- a/net/sunrpc/xprtrdma/svc_rdma_recvfrom.c +++ b/net/sunrpc/xprtrdma/svc_rdma_recvfrom.c @@ -117,7 +117,7 @@ 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_protocol_iwarp(xprt->sc_cm_id->device, + if (!cap_read_multi_sge(xprt->sc_cm_id->device, xprt->sc_cm_id->port_num)) return 1; else -- 2.1.0 -- 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/