Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752794AbcCAXVe (ORCPT ); Tue, 1 Mar 2016 18:21:34 -0500 Received: from userp1040.oracle.com ([156.151.31.81]:35354 "EHLO userp1040.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752380AbcCAXV0 (ORCPT ); Tue, 1 Mar 2016 18:21:26 -0500 From: Santosh Shilimkar To: netdev@vger.kernel.org, davem@davemloft.net Cc: linux-kernel@vger.kernel.org, Santosh Shilimkar Subject: [net-next][PATCH v3 11/13] RDS: IB: add Fastreg MR (FRMR) detection support Date: Tue, 1 Mar 2016 15:20:52 -0800 Message-Id: <1456874454-10355-12-git-send-email-santosh.shilimkar@oracle.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1456874454-10355-1-git-send-email-santosh.shilimkar@oracle.com> References: <1456874454-10355-1-git-send-email-santosh.shilimkar@oracle.com> X-Source-IP: aserv0022.oracle.com [141.146.126.234] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2653 Lines: 75 Discovere Fast Memmory Registration support using IB device IB_DEVICE_MEM_MGT_EXTENSIONS. Certain HCA might support just FRMR or FMR or both FMR and FRWR. In case both mr type are supported, default FMR is used. Default MR is still kept as FMR against what everyone else is following. Default will be changed to FRMR once the RDS performance with FRMR is comparable with FMR. The work is in progress for the same. Signed-off-by: Santosh Shilimkar Signed-off-by: Santosh Shilimkar --- net/rds/ib.c | 10 ++++++++++ net/rds/ib.h | 4 ++++ net/rds/ib_mr.h | 1 + 3 files changed, 15 insertions(+) diff --git a/net/rds/ib.c b/net/rds/ib.c index bb32cb9..b5342fd 100644 --- a/net/rds/ib.c +++ b/net/rds/ib.c @@ -140,6 +140,12 @@ static void rds_ib_add_one(struct ib_device *device) rds_ibdev->max_wrs = device->attrs.max_qp_wr; rds_ibdev->max_sge = min(device->attrs.max_sge, RDS_IB_MAX_SGE); + rds_ibdev->has_fr = (device->attrs.device_cap_flags & + IB_DEVICE_MEM_MGT_EXTENSIONS); + rds_ibdev->has_fmr = (device->alloc_fmr && device->dealloc_fmr && + device->map_phys_fmr && device->unmap_fmr); + rds_ibdev->use_fastreg = (rds_ibdev->has_fr && !rds_ibdev->has_fmr); + rds_ibdev->fmr_max_remaps = device->attrs.max_map_per_fmr?: 32; rds_ibdev->max_1m_mrs = device->attrs.max_mr ? min_t(unsigned int, (device->attrs.max_mr / 2), @@ -178,6 +184,10 @@ static void rds_ib_add_one(struct ib_device *device) rds_ibdev->fmr_max_remaps, rds_ibdev->max_1m_mrs, rds_ibdev->max_8k_mrs); + pr_info("RDS/IB: %s: %s supported and preferred\n", + device->name, + rds_ibdev->use_fastreg ? "FRMR" : "FMR"); + INIT_LIST_HEAD(&rds_ibdev->ipaddr_list); INIT_LIST_HEAD(&rds_ibdev->conn_list); diff --git a/net/rds/ib.h b/net/rds/ib.h index 62fe7d5..c5eddc2 100644 --- a/net/rds/ib.h +++ b/net/rds/ib.h @@ -200,6 +200,10 @@ struct rds_ib_device { struct list_head conn_list; struct ib_device *dev; struct ib_pd *pd; + bool has_fmr; + bool has_fr; + bool use_fastreg; + unsigned int max_mrs; struct rds_ib_mr_pool *mr_1m_pool; struct rds_ib_mr_pool *mr_8k_pool; diff --git a/net/rds/ib_mr.h b/net/rds/ib_mr.h index add7725..2f9b9c3 100644 --- a/net/rds/ib_mr.h +++ b/net/rds/ib_mr.h @@ -93,6 +93,7 @@ struct rds_ib_mr_pool { extern struct workqueue_struct *rds_ib_mr_wq; extern unsigned int rds_ib_mr_1m_pool_size; extern unsigned int rds_ib_mr_8k_pool_size; +extern bool prefer_frmr; struct rds_ib_mr_pool *rds_ib_create_mr_pool(struct rds_ib_device *rds_dev, int npages); -- 1.9.1