From owner-dev-commits-src-branches@freebsd.org Mon Jul 26 16:13:14 2021 Return-Path: Delivered-To: dev-commits-src-branches@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id 7864766F689; Mon, 26 Jul 2021 16:13:14 +0000 (UTC) (envelope-from git@FreeBSD.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "R3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4GYQ2L0g00z3pLF; Mon, 26 Jul 2021 16:13:13 +0000 (UTC) (envelope-from git@FreeBSD.org) Received: from gitrepo.freebsd.org (gitrepo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:5]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (Client did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id BFB9F1A291; Mon, 26 Jul 2021 16:13:13 +0000 (UTC) (envelope-from git@FreeBSD.org) Received: from gitrepo.freebsd.org ([127.0.1.44]) by gitrepo.freebsd.org (8.16.1/8.16.1) with ESMTP id 16QGDDfO005161; Mon, 26 Jul 2021 16:13:13 GMT (envelope-from git@gitrepo.freebsd.org) Received: (from git@localhost) by gitrepo.freebsd.org (8.16.1/8.16.1/Submit) id 16QGDDQc005160; Mon, 26 Jul 2021 16:13:13 GMT (envelope-from git) Date: Mon, 26 Jul 2021 16:13:13 GMT Message-Id: <202107261613.16QGDDQc005160@gitrepo.freebsd.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-branches@FreeBSD.org From: Hans Petter Selasky Subject: git: 6c80d908d671 - stable/13 - ibcore: Remove unused and erroneous msg sequence encoding. MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Git-Committer: hselasky X-Git-Repository: src X-Git-Refname: refs/heads/stable/13 X-Git-Reftype: branch X-Git-Commit: 6c80d908d671c327bc81551460a6aa21f0547c8e Auto-Submitted: auto-generated X-BeenThere: dev-commits-src-branches@freebsd.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Commits to the stable branches of the FreeBSD src repository List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 26 Jul 2021 16:13:14 -0000 The branch stable/13 has been updated by hselasky: URL: https://cgit.FreeBSD.org/src/commit/?id=6c80d908d671c327bc81551460a6aa21f0547c8e commit 6c80d908d671c327bc81551460a6aa21f0547c8e Author: Hans Petter Selasky AuthorDate: 2021-06-16 13:01:33 +0000 Commit: Hans Petter Selasky CommitDate: 2021-07-26 16:04:29 +0000 ibcore: Remove unused and erroneous msg sequence encoding. In cm_form_tid(), a two bit message sequence number is OR'ed into bit 31-30 of the lower TID value. After Linux commit f06d26537559 ("IB/cm: Randomize starting comm ID"), the local_id is XOR'ed with a 32-bit random value. Hence, bit 31-30 in the lower TID now has an arbitrarily value and it makes no sense to OR in the message sequence number. Adding to that, the evolution in use of IDR routines in cm_alloc_id() has always had the possibility of returning a value with bit 30 set. In addition, said bits are never checked. Hence, remove the encoding and the corresponding enum. Linux commit: 87a37ce9e400e40daee537ff95343e3c94743c6d Reviewed by: kib Sponsored by: Mellanox Technologies // NVIDIA Networking (cherry picked from commit 315627b7191dd4fe30a9293609feaf7eeb62e478) --- sys/ofed/drivers/infiniband/core/cm_msgs.h | 7 ------- sys/ofed/drivers/infiniband/core/ib_cm.c | 14 ++++++-------- 2 files changed, 6 insertions(+), 15 deletions(-) diff --git a/sys/ofed/drivers/infiniband/core/cm_msgs.h b/sys/ofed/drivers/infiniband/core/cm_msgs.h index 9b8ef9a93d5b..fa88aa711aa3 100644 --- a/sys/ofed/drivers/infiniband/core/cm_msgs.h +++ b/sys/ofed/drivers/infiniband/core/cm_msgs.h @@ -49,13 +49,6 @@ #define IB_CM_CLASS_VERSION 2 /* IB specification 1.2 */ -enum cm_msg_sequence { - CM_MSG_SEQUENCE_REQ, - CM_MSG_SEQUENCE_LAP, - CM_MSG_SEQUENCE_DREQ, - CM_MSG_SEQUENCE_SIDR -}; - struct cm_req_msg { struct ib_mad_hdr hdr; diff --git a/sys/ofed/drivers/infiniband/core/ib_cm.c b/sys/ofed/drivers/infiniband/core/ib_cm.c index 95b442eb0dd1..5d0229f57260 100644 --- a/sys/ofed/drivers/infiniband/core/ib_cm.c +++ b/sys/ofed/drivers/infiniband/core/ib_cm.c @@ -1130,14 +1130,12 @@ new_id: } EXPORT_SYMBOL(ib_cm_insert_listen); -static __be64 cm_form_tid(struct cm_id_private *cm_id_priv, - enum cm_msg_sequence msg_seq) +static __be64 cm_form_tid(struct cm_id_private *cm_id_priv) { u64 hi_tid, low_tid; hi_tid = ((u64) cm_id_priv->av.port->mad_agent->hi_tid) << 32; - low_tid = (u64) ((__force u32)cm_id_priv->id.local_id | - (msg_seq << 30)); + low_tid = (u64)cm_id_priv->id.local_id; return cpu_to_be64(hi_tid | low_tid); } @@ -1160,7 +1158,7 @@ static void cm_format_req(struct cm_req_msg *req_msg, struct ib_sa_path_rec *alt_path = param->alternate_path; cm_format_mad_hdr(&req_msg->hdr, CM_REQ_ATTR_ID, - cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_REQ)); + cm_form_tid(cm_id_priv)); req_msg->local_comm_id = cm_id_priv->id.local_id; req_msg->service_id = param->service_id; @@ -2171,7 +2169,7 @@ static void cm_format_dreq(struct cm_dreq_msg *dreq_msg, u8 private_data_len) { cm_format_mad_hdr(&dreq_msg->hdr, CM_DREQ_ATTR_ID, - cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_DREQ)); + cm_form_tid(cm_id_priv)); dreq_msg->local_comm_id = cm_id_priv->id.local_id; dreq_msg->remote_comm_id = cm_id_priv->id.remote_id; cm_dreq_set_remote_qpn(dreq_msg, cm_id_priv->remote_qpn); @@ -2775,7 +2773,7 @@ static void cm_format_lap(struct cm_lap_msg *lap_msg, u8 private_data_len) { cm_format_mad_hdr(&lap_msg->hdr, CM_LAP_ATTR_ID, - cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_LAP)); + cm_form_tid(cm_id_priv)); lap_msg->local_comm_id = cm_id_priv->id.local_id; lap_msg->remote_comm_id = cm_id_priv->id.remote_id; cm_lap_set_remote_qpn(lap_msg, cm_id_priv->remote_qpn); @@ -3110,7 +3108,7 @@ static void cm_format_sidr_req(struct cm_sidr_req_msg *sidr_req_msg, struct ib_cm_sidr_req_param *param) { cm_format_mad_hdr(&sidr_req_msg->hdr, CM_SIDR_REQ_ATTR_ID, - cm_form_tid(cm_id_priv, CM_MSG_SEQUENCE_SIDR)); + cm_form_tid(cm_id_priv)); sidr_req_msg->request_id = cm_id_priv->id.local_id; sidr_req_msg->pkey = param->path->pkey; sidr_req_msg->service_id = param->service_id;