From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4FE63C3A5A9 for ; Sat, 2 May 2020 12:36:34 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 369E824961 for ; Sat, 2 May 2020 12:36:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728002AbgEBMgc (ORCPT ); Sat, 2 May 2020 08:36:32 -0400 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:33674 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1727853AbgEBMgS (ORCPT ); Sat, 2 May 2020 08:36:18 -0400 Received: from pps.filterd (m0098419.ppops.net [127.0.0.1]) by mx0b-001b2d01.pphosted.com (8.16.0.42/8.16.0.42) with SMTP id 042CVNcU047210; Sat, 2 May 2020 08:36:14 -0400 Received: from ppma04fra.de.ibm.com (6a.4a.5195.ip4.static.sl-reverse.com [149.81.74.106]) by mx0b-001b2d01.pphosted.com with ESMTP id 30s1su0ga5-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Sat, 02 May 2020 08:36:14 -0400 Received: from pps.filterd (ppma04fra.de.ibm.com [127.0.0.1]) by ppma04fra.de.ibm.com (8.16.0.27/8.16.0.27) with SMTP id 042CZGP6027044; Sat, 2 May 2020 12:36:12 GMT Received: from b06cxnps4075.portsmouth.uk.ibm.com (d06relay12.portsmouth.uk.ibm.com [9.149.109.197]) by ppma04fra.de.ibm.com with ESMTP id 30s0g60a8p-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Sat, 02 May 2020 12:36:12 +0000 Received: from b06wcsmtp001.portsmouth.uk.ibm.com (b06wcsmtp001.portsmouth.uk.ibm.com [9.149.105.160]) by b06cxnps4075.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 042Ca9xa65601548 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Sat, 2 May 2020 12:36:09 GMT Received: from b06wcsmtp001.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id B79DBA4054; Sat, 2 May 2020 12:36:09 +0000 (GMT) Received: from b06wcsmtp001.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 799C4A405B; Sat, 2 May 2020 12:36:09 +0000 (GMT) Received: from tuxmaker.boeblingen.de.ibm.com (unknown [9.152.85.9]) by b06wcsmtp001.portsmouth.uk.ibm.com (Postfix) with ESMTP; Sat, 2 May 2020 12:36:09 +0000 (GMT) From: Karsten Graul To: davem@davemloft.net Cc: netdev@vger.kernel.org, linux-s390@vger.kernel.org, heiko.carstens@de.ibm.com, raspl@linux.ibm.com, ubraun@linux.ibm.com Subject: [PATCH net-next 04/13] net/smc: first part of add link processing as SMC server Date: Sat, 2 May 2020 14:35:43 +0200 Message-Id: <20200502123552.17204-5-kgraul@linux.ibm.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200502123552.17204-1-kgraul@linux.ibm.com> References: <20200502123552.17204-1-kgraul@linux.ibm.com> X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.138,18.0.676 definitions=2020-05-02_06:2020-05-01,2020-05-02 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 lowpriorityscore=0 malwarescore=0 phishscore=0 adultscore=0 impostorscore=0 mlxlogscore=999 bulkscore=0 clxscore=1015 suspectscore=1 mlxscore=0 spamscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2003020000 definitions=main-2005020109 Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org First set of functions to process an ADD_LINK LLC request as an SMC server. Find an alternate IB device, determine the new link group type and get the index for the new link. Then initialize the link and send the ADD_LINK LLC message to the peer. Save the contents of the response, ready the link, map all used buffers and register the buffers with the IB device. If any error occurs, stop the processing and clear the link. Signed-off-by: Karsten Graul Reviewed-by: Ursula Braun --- net/smc/smc_llc.c | 88 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 88 insertions(+) diff --git a/net/smc/smc_llc.c b/net/smc/smc_llc.c index d56ca60597d4..954eda708c91 100644 --- a/net/smc/smc_llc.c +++ b/net/smc/smc_llc.c @@ -863,6 +863,94 @@ static void smc_llc_process_cli_add_link(struct smc_link_group *lgr) mutex_unlock(&lgr->llc_conf_mutex); } +int smc_llc_srv_add_link(struct smc_link *link) +{ + enum smc_lgr_type lgr_new_t = SMC_LGR_SYMMETRIC; + struct smc_link_group *lgr = link->lgr; + struct smc_llc_msg_add_link *add_llc; + struct smc_llc_qentry *qentry = NULL; + struct smc_link *link_new; + struct smc_init_info ini; + int lnk_idx, rc = 0; + + /* ignore client add link recommendation, start new flow */ + ini.vlan_id = lgr->vlan_id; + smc_pnet_find_alt_roce(lgr, &ini, link->smcibdev); + if (!ini.ib_dev) { + lgr_new_t = SMC_LGR_ASYMMETRIC_LOCAL; + ini.ib_dev = link->smcibdev; + ini.ib_port = link->ibport; + } + lnk_idx = smc_llc_alloc_alt_link(lgr, lgr_new_t); + if (lnk_idx < 0) + return 0; + + rc = smcr_link_init(lgr, &lgr->lnk[lnk_idx], lnk_idx, &ini); + if (rc) + return rc; + link_new = &lgr->lnk[lnk_idx]; + rc = smc_llc_send_add_link(link, + link_new->smcibdev->mac[ini.ib_port - 1], + link_new->gid, link_new, SMC_LLC_REQ); + if (rc) + goto out_err; + /* receive ADD LINK response over the RoCE fabric */ + qentry = smc_llc_wait(lgr, link, SMC_LLC_WAIT_TIME, SMC_LLC_ADD_LINK); + if (!qentry) { + rc = -ETIMEDOUT; + goto out_err; + } + add_llc = &qentry->msg.add_link; + if (add_llc->hd.flags & SMC_LLC_FLAG_ADD_LNK_REJ) { + smc_llc_flow_qentry_del(&lgr->llc_flow_lcl); + rc = -ENOLINK; + goto out_err; + } + if (lgr->type == SMC_LGR_SINGLE && + (!memcmp(add_llc->sender_gid, link->peer_gid, SMC_GID_SIZE) && + !memcmp(add_llc->sender_mac, link->peer_mac, ETH_ALEN))) { + lgr_new_t = SMC_LGR_ASYMMETRIC_PEER; + } + smc_llc_save_add_link_info(link_new, add_llc); + smc_llc_flow_qentry_del(&lgr->llc_flow_lcl); + + rc = smc_ib_ready_link(link_new); + if (rc) + goto out_err; + rc = smcr_buf_map_lgr(link_new); + if (rc) + goto out_err; + rc = smcr_buf_reg_lgr(link_new); + if (rc) + goto out_err; + /* tbd: rc = smc_llc_srv_rkey_exchange(link, link_new); */ + if (rc) + goto out_err; + /* tbd: rc = smc_llc_srv_conf_link(link, link_new, lgr_new_t); */ + if (rc) + goto out_err; + return 0; +out_err: + smcr_link_clear(link_new); + return rc; +} + +static void smc_llc_process_srv_add_link(struct smc_link_group *lgr) +{ + struct smc_link *link = lgr->llc_flow_lcl.qentry->link; + int rc; + + smc_llc_flow_qentry_del(&lgr->llc_flow_lcl); + + mutex_lock(&lgr->llc_conf_mutex); + rc = smc_llc_srv_add_link(link); + if (!rc && lgr->type == SMC_LGR_SYMMETRIC) { + /* delete any asymmetric link */ + /* tbd: smc_llc_delete_asym_link(lgr); */ + } + mutex_unlock(&lgr->llc_conf_mutex); +} + /* worker to process an add link message */ static void smc_llc_add_link_work(struct work_struct *work) { -- 2.17.1