From patchwork Wed Dec 2 00:53:21 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tyrel Datwyler X-Patchwork-Id: 11944441 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=-16.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable 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 F1A2EC83017 for ; Wed, 2 Dec 2020 00:55:07 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B2C672076C for ; Wed, 2 Dec 2020 00:55:07 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727543AbgLBAy2 (ORCPT ); Tue, 1 Dec 2020 19:54:28 -0500 Received: from mx0a-001b2d01.pphosted.com ([148.163.156.1]:48432 "EHLO mx0a-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727272AbgLBAy2 (ORCPT ); Tue, 1 Dec 2020 19:54:28 -0500 Received: from pps.filterd (m0098399.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.42/8.16.0.42) with SMTP id 0B20Vgd9182364; Tue, 1 Dec 2020 19:53:39 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-transfer-encoding; s=pp1; bh=L83EmJDiaA6vBN/K32hRfSX4Wt5CrI64fp/NIF2CTmI=; b=g6WaWGk1qgJg4977Pfc8ypP32Z7Hm/Z5TiH2VTp26Buipu30hPtiev8pqP/oo83vUr6J g+lcdq26ZglVWK3kfDcFaJSseCorGpBzG+MsXSIGA7yAbTE6a1joF3cWrn+vdGb/xJFU SijI+GT40elwHar2HnH9qZtW0Kd0V+4JpELiWlnzpenOaoB/XWjENfxjIuS9tozu9vKw VQMeGuvF1X26chniepb4MyPJylL7EXvprra/fd327g+BiRGCy8Ena9/1Z+gdkEljufed s7kCeJ44iOfYPK0UCF89SjK0hr5WbCVgzXYHQNraOBA+vOeE1DL2x3XQcPAtym/QQWB4 Lw== Received: from ppma02wdc.us.ibm.com (aa.5b.37a9.ip4.static.sl-reverse.com [169.55.91.170]) by mx0a-001b2d01.pphosted.com with ESMTP id 355he4en0k-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 01 Dec 2020 19:53:39 -0500 Received: from pps.filterd (ppma02wdc.us.ibm.com [127.0.0.1]) by ppma02wdc.us.ibm.com (8.16.0.42/8.16.0.42) with SMTP id 0B20cJCq006782; Wed, 2 Dec 2020 00:53:38 GMT Received: from b03cxnp07028.gho.boulder.ibm.com (b03cxnp07028.gho.boulder.ibm.com [9.17.130.15]) by ppma02wdc.us.ibm.com with ESMTP id 353e694e57-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 02 Dec 2020 00:53:37 +0000 Received: from b03ledav004.gho.boulder.ibm.com (b03ledav004.gho.boulder.ibm.com [9.17.130.235]) by b03cxnp07028.gho.boulder.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 0B20raTk24117578 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 2 Dec 2020 00:53:36 GMT Received: from b03ledav004.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id E8B697805C; Wed, 2 Dec 2020 00:53:35 +0000 (GMT) Received: from b03ledav004.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 8B1587805F; Wed, 2 Dec 2020 00:53:35 +0000 (GMT) Received: from vios4361.aus.stglabs.ibm.com (unknown [9.3.43.61]) by b03ledav004.gho.boulder.ibm.com (Postfix) with ESMTP; Wed, 2 Dec 2020 00:53:35 +0000 (GMT) From: Tyrel Datwyler To: james.bottomley@hansenpartnership.com Cc: martin.petersen@oracle.com, linux-scsi@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org, brking@linux.ibm.com, Tyrel Datwyler Subject: [PATCH v2 09/17] ibmvfc: implement channel enquiry and setup commands Date: Tue, 1 Dec 2020 18:53:21 -0600 Message-Id: <20201202005329.4538-10-tyreld@linux.ibm.com> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20201202005329.4538-1-tyreld@linux.ibm.com> References: <20201202005329.4538-1-tyreld@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.312,18.0.737 definitions=2020-12-01_12:2020-11-30,2020-12-01 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 phishscore=0 impostorscore=0 lowpriorityscore=0 spamscore=0 priorityscore=1501 clxscore=1015 malwarescore=0 suspectscore=4 bulkscore=0 mlxscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2009150000 definitions=main-2012010142 Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org New NPIV_ENQUIRY_CHANNEL and NPIV_SETUP_CHANNEL management datagrams (MADs) were defined in a previous patchset. If the client advertises a desire to use channels and the partner VIOS is channel capable then the client must proceed with channel enquiry to determine the maximum number of channels the VIOS is capable of providing, and registering SubCRQs via channel setup with the VIOS immediately following NPIV Login. This handshaking should not be performed for subsequent NPIV Logins unless the CRQ connection has been reset. Implement these two new MADs and issue them following a successful NPIV login where the VIOS has set the SUPPORT_CHANNELS capability bit in the NPIV Login response. Signed-off-by: Tyrel Datwyler Reviewed-by: Brian King --- drivers/scsi/ibmvscsi/ibmvfc.c | 135 ++++++++++++++++++++++++++++++++- drivers/scsi/ibmvscsi/ibmvfc.h | 3 + 2 files changed, 136 insertions(+), 2 deletions(-) diff --git a/drivers/scsi/ibmvscsi/ibmvfc.c b/drivers/scsi/ibmvscsi/ibmvfc.c index 0336833a6950..bfd3340eb0b6 100644 --- a/drivers/scsi/ibmvscsi/ibmvfc.c +++ b/drivers/scsi/ibmvscsi/ibmvfc.c @@ -806,6 +806,8 @@ static int ibmvfc_reset_crq(struct ibmvfc_host *vhost) spin_lock_irqsave(vhost->host->host_lock, flags); vhost->state = IBMVFC_NO_CRQ; vhost->logged_in = 0; + vhost->do_enquiry = 1; + vhost->using_channels = 0; /* Clean out the queue */ memset(crq->msgs, 0, PAGE_SIZE); @@ -4473,6 +4475,118 @@ static void ibmvfc_discover_targets(struct ibmvfc_host *vhost) ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); } +static void ibmvfc_channel_setup_done(struct ibmvfc_event *evt) +{ + struct ibmvfc_host *vhost = evt->vhost; + u32 mad_status = be16_to_cpu(evt->xfer_iu->channel_setup.common.status); + int level = IBMVFC_DEFAULT_LOG_LEVEL; + + ibmvfc_free_event(evt); + + switch (mad_status) { + case IBMVFC_MAD_SUCCESS: + ibmvfc_dbg(vhost, "Channel Setup succeded\n"); + vhost->do_enquiry = 0; + break; + case IBMVFC_MAD_FAILED: + level += ibmvfc_retry_host_init(vhost); + ibmvfc_log(vhost, level, "Channel Setup failed\n"); + fallthrough; + case IBMVFC_MAD_DRIVER_FAILED: + return; + default: + dev_err(vhost->dev, "Invalid Channel Setup response: 0x%x\n", + mad_status); + ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); + return; + } + + ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); + wake_up(&vhost->work_wait_q); +} + +static void ibmvfc_channel_setup(struct ibmvfc_host *vhost) +{ + struct ibmvfc_channel_setup_mad *mad; + struct ibmvfc_channel_setup *setup_buf = vhost->channel_setup_buf; + struct ibmvfc_event *evt = ibmvfc_get_event(vhost); + + memset(setup_buf, 0, sizeof(*setup_buf)); + setup_buf->flags = cpu_to_be32(IBMVFC_CANCEL_CHANNELS); + + ibmvfc_init_event(evt, ibmvfc_channel_setup_done, IBMVFC_MAD_FORMAT); + mad = &evt->iu.channel_setup; + memset(mad, 0, sizeof(*mad)); + mad->common.version = cpu_to_be32(1); + mad->common.opcode = cpu_to_be32(IBMVFC_CHANNEL_SETUP); + mad->common.length = cpu_to_be16(sizeof(*mad)); + mad->buffer.va = cpu_to_be64(vhost->channel_setup_dma); + mad->buffer.len = cpu_to_be32(sizeof(*vhost->channel_setup_buf)); + + ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT); + + if (!ibmvfc_send_event(evt, vhost, default_timeout)) + ibmvfc_dbg(vhost, "Sent channel setup\n"); + else + ibmvfc_link_down(vhost, IBMVFC_LINK_DOWN); +} + +static void ibmvfc_channel_enquiry_done(struct ibmvfc_event *evt) +{ + struct ibmvfc_host *vhost = evt->vhost; + struct ibmvfc_channel_enquiry *rsp = &evt->xfer_iu->channel_enquiry; + u32 mad_status = be16_to_cpu(rsp->common.status); + int level = IBMVFC_DEFAULT_LOG_LEVEL; + + switch (mad_status) { + case IBMVFC_MAD_SUCCESS: + ibmvfc_dbg(vhost, "Channel Enquiry succeeded\n"); + vhost->max_vios_scsi_channels = be32_to_cpu(rsp->num_scsi_subq_channels); + ibmvfc_free_event(evt); + break; + case IBMVFC_MAD_FAILED: + level += ibmvfc_retry_host_init(vhost); + ibmvfc_log(vhost, level, "Channel Enquiry failed\n"); + fallthrough; + case IBMVFC_MAD_DRIVER_FAILED: + ibmvfc_free_event(evt); + return; + default: + dev_err(vhost->dev, "Invalid Channel Enquiry response: 0x%x\n", + mad_status); + ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); + ibmvfc_free_event(evt); + return; + } + + ibmvfc_channel_setup(vhost); +} + +static void ibmvfc_channel_enquiry(struct ibmvfc_host *vhost) +{ + struct ibmvfc_channel_enquiry *mad; + struct ibmvfc_event *evt = ibmvfc_get_event(vhost); + + ibmvfc_init_event(evt, ibmvfc_channel_enquiry_done, IBMVFC_MAD_FORMAT); + mad = &evt->iu.channel_enquiry; + memset(mad, 0, sizeof(*mad)); + mad->common.version = cpu_to_be32(1); + mad->common.opcode = cpu_to_be32(IBMVFC_CHANNEL_ENQUIRY); + mad->common.length = cpu_to_be16(sizeof(*mad)); + + if (IBMVFC_MIG_NO_SUB_TO_CRQ) + mad->flags |= cpu_to_be32(IBMVFC_NO_CHANNELS_TO_CRQ_SUPPORT); + if (IBMVFC_MIG_NO_N_TO_M) + mad->flags |= cpu_to_be32(IBMVFC_NO_N_TO_M_CHANNELS_SUPPORT); + + ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_INIT_WAIT); + + if (!ibmvfc_send_event(evt, vhost, default_timeout)) + ibmvfc_dbg(vhost, "Send channel enquiry\n"); + else + ibmvfc_link_down(vhost, IBMVFC_LINK_DEAD); +} + /** * ibmvfc_npiv_login_done - Completion handler for NPIV Login * @evt: ibmvfc event struct @@ -4554,8 +4668,14 @@ static void ibmvfc_npiv_login_done(struct ibmvfc_event *evt) vhost->host->can_queue = be32_to_cpu(rsp->max_cmds) - IBMVFC_NUM_INTERNAL_REQ; vhost->host->max_sectors = npiv_max_sectors; - ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); - wake_up(&vhost->work_wait_q); + + if (ibmvfc_check_caps(vhost, IBMVFC_CAN_SUPPORT_CHANNELS) && vhost->do_enquiry) { + ibmvfc_channel_enquiry(vhost); + } else { + vhost->do_enquiry = 0; + ibmvfc_set_host_action(vhost, IBMVFC_HOST_ACTION_QUERY); + wake_up(&vhost->work_wait_q); + } } /** @@ -5327,9 +5447,20 @@ static int ibmvfc_alloc_mem(struct ibmvfc_host *vhost) goto free_trace; } + vhost->channel_setup_buf = dma_alloc_coherent(dev, sizeof(*vhost->channel_setup_buf), + &vhost->channel_setup_dma, + GFP_KERNEL); + + if (!vhost->channel_setup_buf) { + dev_err(dev, "Couldn't allocate Channel Setup buffer\n"); + goto free_tgt_pool; + } + LEAVE; return 0; +free_tgt_pool: + mempool_destroy(vhost->tgt_pool); free_trace: kfree(vhost->trace); free_disc_buffer: diff --git a/drivers/scsi/ibmvscsi/ibmvfc.h b/drivers/scsi/ibmvscsi/ibmvfc.h index 986ce4530382..dff26dbd912c 100644 --- a/drivers/scsi/ibmvscsi/ibmvfc.h +++ b/drivers/scsi/ibmvscsi/ibmvfc.h @@ -842,10 +842,13 @@ struct ibmvfc_host { struct ibmvfc_npiv_login login_info; union ibmvfc_npiv_login_data *login_buf; dma_addr_t login_buf_dma; + struct ibmvfc_channel_setup *channel_setup_buf; + dma_addr_t channel_setup_dma; int disc_buf_sz; int log_level; struct ibmvfc_discover_targets_entry *disc_buf; struct mutex passthru_mutex; + int max_vios_scsi_channels; int task_set; int init_retries; int discovery_threads;