From patchwork Mon Nov 25 16:56:55 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Roman Bolshakov X-Patchwork-Id: 11260689 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id B645E138C for ; Mon, 25 Nov 2019 16:57:26 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 96DAA20740 for ; Mon, 25 Nov 2019 16:57:26 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=yadro.com header.i=@yadro.com header.b="KSahFrQe" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728989AbfKYQ5Z (ORCPT ); Mon, 25 Nov 2019 11:57:25 -0500 Received: from mta-02.yadro.com ([89.207.88.252]:39630 "EHLO mta-01.yadro.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1728853AbfKYQ5T (ORCPT ); Mon, 25 Nov 2019 11:57:19 -0500 Received: from localhost (unknown [127.0.0.1]) by mta-01.yadro.com (Postfix) with ESMTP id 5503E43E1B; Mon, 25 Nov 2019 16:57:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=yadro.com; h= content-type:content-type:content-transfer-encoding:mime-version :references:in-reply-to:x-mailer:message-id:date:date:subject :subject:from:from:received:received:received; s=mta-01; t= 1574701036; x=1576515437; bh=RGl9Y1wcxFdhzHYOksJaiTWGnbIV50A9rlN hMV+th24=; b=KSahFrQerY1fLAUwxHVW3DkHnbHo3tyST5u0FHkRi8fx58rUOBg E49v1XOtiv7ZCwWTprE9wOZqIyl4oFHtnKm/WJPH6P7WZhi4zYeu2+jei6VuvTHJ GSdYwzGKpXjZZA4QdJQ04BO4oONf+EDRls0+JMuUCzCZ2r0WPkHHhBKg= X-Virus-Scanned: amavisd-new at yadro.com Received: from mta-01.yadro.com ([127.0.0.1]) by localhost (mta-01.yadro.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id WRO3z6D13aev; Mon, 25 Nov 2019 19:57:16 +0300 (MSK) Received: from T-EXCH-02.corp.yadro.com (t-exch-02.corp.yadro.com [172.17.10.102]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-SHA384 (256/256 bits)) (No client certificate requested) by mta-01.yadro.com (Postfix) with ESMTPS id 6DB5443E04; Mon, 25 Nov 2019 19:57:15 +0300 (MSK) Received: from localhost (172.17.128.60) by T-EXCH-02.corp.yadro.com (172.17.10.102) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384_P384) id 15.1.669.32; Mon, 25 Nov 2019 19:57:15 +0300 From: Roman Bolshakov To: , CC: , Roman Bolshakov , Quinn Tran , Himanshu Madhani Subject: [PATCH v3 06/13] scsi: qla2xxx: Allow PLOGI in target mode Date: Mon, 25 Nov 2019 19:56:55 +0300 Message-ID: <20191125165702.1013-7-r.bolshakov@yadro.com> X-Mailer: git-send-email 2.24.0 In-Reply-To: <20191125165702.1013-1-r.bolshakov@yadro.com> References: <20191125165702.1013-1-r.bolshakov@yadro.com> MIME-Version: 1.0 X-Originating-IP: [172.17.128.60] X-ClientProxiedBy: T-EXCH-01.corp.yadro.com (172.17.10.101) To T-EXCH-02.corp.yadro.com (172.17.10.102) Sender: linux-scsi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org According to FC-LS-3 (Fibre Channel Link Services) 6.3.2.4 "N_Port Login - No Fabric present", if both parties in the point-to-point connection know N_Port_Names of each other, Nx_Port with the highest N_Port_name shall transmit PLOGI. The specification sets no restrictions on the port role that should send PLOGI. However, FCP-4 (Fibre Channel Protocol for SCSI, Fourth Version) 6.2 "Overview of Process Login and Process Logout", instructs that in point-to-point topology, initiator shall send explicit PRLI ELS. The change fixes stuck P2P login, when target WWPN is higher than initiator WWPN. Cc: Quinn Tran Cc: Himanshu Madhani Signed-off-by: Roman Bolshakov --- drivers/scsi/qla2xxx/qla_init.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/drivers/scsi/qla2xxx/qla_init.c b/drivers/scsi/qla2xxx/qla_init.c index fcb309be50d9..b4283a3126d0 100644 --- a/drivers/scsi/qla2xxx/qla_init.c +++ b/drivers/scsi/qla2xxx/qla_init.c @@ -1527,8 +1527,8 @@ int qla24xx_fcport_handle_login(struct scsi_qla_host *vha, fc_port_t *fcport) } } - /* for pure Target Mode. Login will not be initiated */ - if (vha->host->active_mode == MODE_TARGET) + /* Target won't initiate port login if fabric is present */ + if (vha->host->active_mode == MODE_TARGET && !N2N_TOPO(vha->hw)) return 0; if (fcport->flags & FCF_ASYNC_SENT) { @@ -1720,6 +1720,10 @@ void qla24xx_handle_relogin_event(scsi_qla_host_t *vha, void qla_handle_els_plogi_done(scsi_qla_host_t *vha, struct event_arg *ea) { + /* for pure Target Mode, PRLI will not be initiated */ + if (vha->host->active_mode == MODE_TARGET) + return; + ql_dbg(ql_dbg_disc, vha, 0x2118, "%s %d %8phC post PRLI\n", __func__, __LINE__, ea->fcport->port_name);