From patchwork Thu Oct 7 20:40:49 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bob Pearson X-Patchwork-Id: 12543267 X-Patchwork-Delegate: jgg@ziepe.ca Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id B3E99C4332F for ; Thu, 7 Oct 2021 20:41:35 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 99BDB60F90 for ; Thu, 7 Oct 2021 20:41:35 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233168AbhJGUn2 (ORCPT ); Thu, 7 Oct 2021 16:43:28 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59750 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230467AbhJGUn2 (ORCPT ); Thu, 7 Oct 2021 16:43:28 -0400 Received: from mail-ot1-x330.google.com (mail-ot1-x330.google.com [IPv6:2607:f8b0:4864:20::330]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 01192C061570 for ; Thu, 7 Oct 2021 13:41:34 -0700 (PDT) Received: by mail-ot1-x330.google.com with SMTP id u20-20020a9d7214000000b0054e170300adso8986251otj.13 for ; Thu, 07 Oct 2021 13:41:33 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=lBxkpKC/Ie6Rn+yTC69M869crKSuud+tFzqyCacmKP8=; b=nMXTotcVtAjvqZnAIleAXAT6LviaZpPAli99KVVbRhZ/NnZ2WdH3Qy8Al6CxsUEgcH H1doknBMHlpLVQGCZIAGNG+JQT3qhHCsf1qLBjZ4TK2f9s6jLzWjh8Uk7ZrEYCOZPqZt 1+o8nhG4a0B0pVfUnfaFVuTUzyy6APHsT7g7Bz2aYhQ3hEW0lPfXVSV8Dy7weOlbxdUU sFJWuMfqBNgAqKpd+Opixqzgjcf9n+dsjiatj5A3uO/aSIPQc12nSPoxPrtIdsElXs2d W9vMabSpP6Ew3uMS/CMllfcTTdqJITC27rtWBXOZii8GJEWdWvex1LmLq4hwNiddXQrJ tJ1g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=lBxkpKC/Ie6Rn+yTC69M869crKSuud+tFzqyCacmKP8=; b=xEaNiZil1ZLrSyBVr7D0GTqrkTi8dj4GQJ2r6K8sgJja279yU95NTi19lASHhcdM9y yNKPMjxEgCxaK+xNxTTIPA0JFkG26ntme1rhSCe3RwXwESJ4ouOxs5cNzuJkJuyR/o8b qM6irlv7ACAYDVqRnBlyNPjwkaHRwsgu1THiwXV/3GBJkJNdRm+UWfvN1d9pnPOKA6kj m9jTj/9Jdk8AHOHAjjI6n/h/Tl2JtShUzGoQ1pGHFSk4dsPiH5Vg1koBhnY+jMNKR8yN tRsrfba1pcbBDhczZaV1oRQAPIrw5uncsuwMJGGbC7KoMg18pS9afpw0F9KqeR1EdT26 B46w== X-Gm-Message-State: AOAM531my8KYqVitBzchnL1w6oPALHDRv2Bxu2WnGotxh/OahWILiFGK 6pMlR4MKwu4SqC4PLKEBeqE= X-Google-Smtp-Source: ABdhPJzzNU/mlVCdLI4w/GOSwRx6HNbx7qhMMS1+28WT3MDeYuC8PVqYsEavMf3RaVY4rpFxZoKjTw== X-Received: by 2002:a9d:6092:: with SMTP id m18mr5461337otj.215.1633639293439; Thu, 07 Oct 2021 13:41:33 -0700 (PDT) Received: from ubunto-21.tx.rr.com (2603-8081-140c-1a00-1259-16f0-10f5-1724.res6.spectrum.com. [2603:8081:140c:1a00:1259:16f0:10f5:1724]) by smtp.gmail.com with ESMTPSA id f10sm71607ooh.42.2021.10.07.13.41.33 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 07 Oct 2021 13:41:33 -0700 (PDT) From: Bob Pearson To: jgg@nvidia.com, zyjzyj2000@gmail.com, linux-rdma@vger.kernel.org Cc: Bob Pearson Subject: [PATCH for-next v6 3/6] RDMA/rxe: Create AH index and return to user space Date: Thu, 7 Oct 2021 15:40:49 -0500 Message-Id: <20211007204051.10086-4-rpearsonhpe@gmail.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20211007204051.10086-1-rpearsonhpe@gmail.com> References: <20211007204051.10086-1-rpearsonhpe@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-rdma@vger.kernel.org Make changes to rdma_user_rxe.h to allow indexing AH objects, passing the index in UD send WRs to the driver and returning the index to the rxe provider. Modify rxe_create_ah() to add an index to AH when created and if called from a new user provider return it to user space. If called from an old provider mark the AH as not having a useful index. Modify rxe_destroy_ah to drop the index before deleting the object. Signed-off-by: Bob Pearson --- drivers/infiniband/sw/rxe/rxe_verbs.c | 31 ++++++++++++++++++++++++++- drivers/infiniband/sw/rxe/rxe_verbs.h | 2 ++ include/uapi/rdma/rdma_user_rxe.h | 8 ++++++- 3 files changed, 39 insertions(+), 2 deletions(-) diff --git a/drivers/infiniband/sw/rxe/rxe_verbs.c b/drivers/infiniband/sw/rxe/rxe_verbs.c index c09e1c25ce66..8854ace63acd 100644 --- a/drivers/infiniband/sw/rxe/rxe_verbs.c +++ b/drivers/infiniband/sw/rxe/rxe_verbs.c @@ -158,9 +158,19 @@ static int rxe_create_ah(struct ib_ah *ibah, struct ib_udata *udata) { - int err; struct rxe_dev *rxe = to_rdev(ibah->device); struct rxe_ah *ah = to_rah(ibah); + struct rxe_create_ah_resp __user *uresp = NULL; + int err; + + if (udata) { + /* test if new user provider */ + if (udata->outlen >= sizeof(*uresp)) + uresp = udata->outbuf; + ah->is_user = true; + } else { + ah->is_user = false; + } err = rxe_av_chk_attr(rxe, init_attr->ah_attr); if (err) @@ -170,6 +180,24 @@ static int rxe_create_ah(struct ib_ah *ibah, if (err) return err; + /* create index > 0 */ + rxe_add_index(ah); + ah->ah_num = ah->pelem.index; + + if (uresp) { + /* only if new user provider */ + err = copy_to_user(&uresp->ah_num, &ah->ah_num, + sizeof(uresp->ah_num)); + if (err) { + rxe_drop_index(ah); + rxe_drop_ref(ah); + return -EFAULT; + } + } else if (ah->is_user) { + /* only if old user provider */ + ah->ah_num = 0; + } + rxe_init_av(init_attr->ah_attr, &ah->av); return 0; } @@ -202,6 +230,7 @@ static int rxe_destroy_ah(struct ib_ah *ibah, u32 flags) { struct rxe_ah *ah = to_rah(ibah); + rxe_drop_index(ah); rxe_drop_ref(ah); return 0; } diff --git a/drivers/infiniband/sw/rxe/rxe_verbs.h b/drivers/infiniband/sw/rxe/rxe_verbs.h index c807639435eb..9cd203f1fa22 100644 --- a/drivers/infiniband/sw/rxe/rxe_verbs.h +++ b/drivers/infiniband/sw/rxe/rxe_verbs.h @@ -48,6 +48,8 @@ struct rxe_ah { struct rxe_pool_entry pelem; struct rxe_pd *pd; struct rxe_av av; + bool is_user; + int ah_num; }; struct rxe_cqe { diff --git a/include/uapi/rdma/rdma_user_rxe.h b/include/uapi/rdma/rdma_user_rxe.h index 2f1ebbe96434..dc9f7a5e203a 100644 --- a/include/uapi/rdma/rdma_user_rxe.h +++ b/include/uapi/rdma/rdma_user_rxe.h @@ -99,7 +99,8 @@ struct rxe_send_wr { __u32 remote_qkey; __u16 pkey_index; __u16 reserved; - __u32 pad[5]; + __u32 ah_num; + __u32 pad[4]; struct rxe_av av; } ud; struct { @@ -170,6 +171,11 @@ struct rxe_recv_wqe { struct rxe_dma_info dma; }; +struct rxe_create_ah_resp { + __u32 ah_num; + __u32 reserved; +}; + struct rxe_create_cq_resp { struct mminfo mi; };