From patchwork Thu Dec 24 09:18:06 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kamal Heib X-Patchwork-Id: 7916071 Return-Path: X-Original-To: patchwork-linux-rdma@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 270C29F1AF for ; Thu, 24 Dec 2015 09:20:33 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 2E87720444 for ; Thu, 24 Dec 2015 09:20:32 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 8615820604 for ; Thu, 24 Dec 2015 09:20:30 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933264AbbLXJU2 (ORCPT ); Thu, 24 Dec 2015 04:20:28 -0500 Received: from [193.47.165.129] ([193.47.165.129]:33093 "EHLO mellanox.co.il" rhost-flags-FAIL-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S933070AbbLXJU1 (ORCPT ); Thu, 24 Dec 2015 04:20:27 -0500 Received: from Internal Mail-Server by MTLPINE1 (envelope-from kamalh@mellanox.com) with ESMTPS (AES256-SHA encrypted); 24 Dec 2015 11:19:08 +0200 Received: from dev-h-vrt-008.mth.labs.mlnx (dev-h-vrt-008.mth.labs.mlnx [10.194.8.1]) by labmailer.mlnx (8.13.8/8.13.8) with ESMTP id tBO9J5qf029430; Thu, 24 Dec 2015 11:19:08 +0200 From: Kamal Heib To: Doug Ledford Cc: Kamal Heib , linux-rdma@vger.kernel.org, Tal Alon , Liran Liss , Amir Vadai Subject: [PATCH rdma-next V2 20/32] IB/rxe: Multicast implementation Date: Thu, 24 Dec 2015 11:18:06 +0200 Message-Id: <1450948698-13383-21-git-send-email-kamalh@mellanox.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1450948698-13383-1-git-send-email-kamalh@mellanox.com> References: <1450948698-13383-1-git-send-email-kamalh@mellanox.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, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=ham 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 Multicast groups handling. Signed-off-by: Kamal Heib Signed-off-by: Amir Vadai Reviewed-by: Haggai Eran --- drivers/staging/rdma/rxe/rxe_mcast.c | 190 +++++++++++++++++++++++++++++++++++ 1 file changed, 190 insertions(+) create mode 100644 drivers/staging/rdma/rxe/rxe_mcast.c diff --git a/drivers/staging/rdma/rxe/rxe_mcast.c b/drivers/staging/rdma/rxe/rxe_mcast.c new file mode 100644 index 0000000..bcf37be --- /dev/null +++ b/drivers/staging/rdma/rxe/rxe_mcast.c @@ -0,0 +1,190 @@ +/* + * Copyright (c) 2015 Mellanox Technologies Ltd. All rights reserved. + * Copyright (c) 2015 System Fabric Works, Inc. All rights reserved. + * + * This software is available to you under a choice of one of two + * licenses. You may choose to be licensed under the terms of the GNU + * General Public License (GPL) Version 2, available from the file + * COPYING in the main directory of this source tree, or the + * OpenIB.org BSD license below: + * + * Redistribution and use in source and binary forms, with or + * without modification, are permitted provided that the following + * conditions are met: + * + * - Redistributions of source code must retain the above + * copyright notice, this list of conditions and the following + * disclaimer. + * + * - Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials + * provided with the distribution. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +#include "rxe.h" +#include "rxe_loc.h" + +int rxe_mcast_get_grp(struct rxe_dev *rxe, union ib_gid *mgid, + struct rxe_mc_grp **grp_p) +{ + int err; + struct rxe_mc_grp *grp; + + if (rxe->attr.max_mcast_qp_attach == 0) { + err = -EINVAL; + goto err1; + } + + grp = rxe_pool_get_key(&rxe->mc_grp_pool, mgid); + if (grp) + goto done; + + grp = rxe_alloc(&rxe->mc_grp_pool); + if (!grp) { + err = -ENOMEM; + goto err1; + } + + INIT_LIST_HEAD(&grp->qp_list); + spin_lock_init(&grp->mcg_lock); + grp->rxe = rxe; + + rxe_add_key(grp, mgid); + + err = rxe->ifc_ops->mcast_add(rxe, mgid); + if (err) + goto err2; + +done: + *grp_p = grp; + return 0; + +err2: + rxe_drop_ref(grp); +err1: + return err; +} + +int rxe_mcast_add_grp_elem(struct rxe_dev *rxe, struct rxe_qp *qp, + struct rxe_mc_grp *grp) +{ + int err; + struct rxe_mc_elem *elem; + + /* check to see of the qp is already a member of the group */ + spin_lock_bh(&qp->grp_lock); + spin_lock_bh(&grp->mcg_lock); + list_for_each_entry(elem, &grp->qp_list, qp_list) { + if (elem->qp == qp) { + err = 0; + goto out; + } + } + + if (grp->num_qp >= rxe->attr.max_mcast_qp_attach) { + err = -ENOMEM; + goto out; + } + + elem = rxe_alloc(&rxe->mc_elem_pool); + if (!elem) { + err = -ENOMEM; + goto out; + } + + /* each qp holds a ref on the grp */ + rxe_add_ref(grp); + + grp->num_qp++; + elem->qp = qp; + elem->grp = grp; + + list_add(&elem->qp_list, &grp->qp_list); + list_add(&elem->grp_list, &qp->grp_list); + + err = 0; +out: + spin_unlock_bh(&grp->mcg_lock); + spin_unlock_bh(&qp->grp_lock); + return err; +} + +int rxe_mcast_drop_grp_elem(struct rxe_dev *rxe, struct rxe_qp *qp, + union ib_gid *mgid) +{ + struct rxe_mc_grp *grp; + struct rxe_mc_elem *elem, *tmp; + + grp = rxe_pool_get_key(&rxe->mc_grp_pool, mgid); + if (!grp) + goto err1; + + spin_lock_bh(&qp->grp_lock); + spin_lock_bh(&grp->mcg_lock); + + list_for_each_entry_safe(elem, tmp, &grp->qp_list, qp_list) { + if (elem->qp == qp) { + list_del(&elem->qp_list); + list_del(&elem->grp_list); + grp->num_qp--; + + spin_unlock_bh(&grp->mcg_lock); + spin_unlock_bh(&qp->grp_lock); + rxe_drop_ref(elem); + rxe_drop_ref(grp); /* ref held by QP */ + rxe_drop_ref(grp); /* ref from get_key */ + return 0; + } + } + + spin_unlock_bh(&grp->mcg_lock); + spin_unlock_bh(&qp->grp_lock); + rxe_drop_ref(grp); /* ref from get_key */ +err1: + return -EINVAL; +} + +void rxe_drop_all_mcast_groups(struct rxe_qp *qp) +{ + struct rxe_mc_grp *grp; + struct rxe_mc_elem *elem; + + while (1) { + spin_lock_bh(&qp->grp_lock); + if (list_empty(&qp->grp_list)) { + spin_unlock_bh(&qp->grp_lock); + break; + } + elem = list_first_entry(&qp->grp_list, struct rxe_mc_elem, + grp_list); + list_del(&elem->grp_list); + spin_unlock_bh(&qp->grp_lock); + + grp = elem->grp; + spin_lock_bh(&grp->mcg_lock); + list_del(&elem->qp_list); + grp->num_qp--; + spin_unlock_bh(&grp->mcg_lock); + rxe_drop_ref(grp); + rxe_drop_ref(elem); + } +} + +void rxe_mc_cleanup(void *arg) +{ + struct rxe_mc_grp *grp = arg; + struct rxe_dev *rxe = grp->rxe; + + rxe_drop_key(grp); + rxe->ifc_ops->mcast_delete(rxe, &grp->mgid); +}