From patchwork Thu Jan 14 20:31:39 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tyrel Datwyler X-Patchwork-Id: 364254 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=-16.8 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 D3AF5C433E0 for ; Thu, 14 Jan 2021 20:33:35 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9B3E823A5F for ; Thu, 14 Jan 2021 20:33:35 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728134AbhANUcq (ORCPT ); Thu, 14 Jan 2021 15:32:46 -0500 Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:48542 "EHLO mx0b-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727954AbhANUcp (ORCPT ); Thu, 14 Jan 2021 15:32:45 -0500 Received: from pps.filterd (m0127361.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.16.0.42/8.16.0.42) with SMTP id 10EKKnAP186082; Thu, 14 Jan 2021 15:31:59 -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=l431NZQBSk+btUL8OiC0lBjrprIvUfWPsnRrx67uZ3g=; b=HY4RpHhBJN2zRnZ7PE6O0aj4pvEqTQm0RnqzOUUa3EpuJRFMOiKtO53M5vPt28X9aiOt GTNUbdfvK38ZYYT8tcpCteyuJTbzzMbKzg4anyLyZdm9k5bW+0VPbRMPwNqP7mBGA2zK 8ApYLN3f+kKg0MrjNQrC64yfylU1Lq8xp6AIW0rjWgEA9Dt8Dwkj4oBjbAYsrh3xtex+ gDfYwUCoZ+QMwEqittul21WyCXFtNfla608IQfZ3c5nJhexy5XOFqegGC1UIGLwzRgYb TIldi0w9Pz8xruBYh7bK3gIkzhjg4dhckSr6/Kow/19xJpvdppBmtSa3zJwAFTyNSsfu 9Q== Received: from ppma03wdc.us.ibm.com (ba.79.3fa9.ip4.static.sl-reverse.com [169.63.121.186]) by mx0a-001b2d01.pphosted.com with ESMTP id 362vwr07db-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 14 Jan 2021 15:31:58 -0500 Received: from pps.filterd (ppma03wdc.us.ibm.com [127.0.0.1]) by ppma03wdc.us.ibm.com (8.16.0.42/8.16.0.42) with SMTP id 10EKRSh4013849; Thu, 14 Jan 2021 20:31:56 GMT Received: from b03cxnp08027.gho.boulder.ibm.com (b03cxnp08027.gho.boulder.ibm.com [9.17.130.19]) by ppma03wdc.us.ibm.com with ESMTP id 35y449fsv2-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 14 Jan 2021 20:31:56 +0000 Received: from b03ledav001.gho.boulder.ibm.com (b03ledav001.gho.boulder.ibm.com [9.17.130.232]) by b03cxnp08027.gho.boulder.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 10EKVtLN10158564 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 14 Jan 2021 20:31:55 GMT Received: from b03ledav001.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 4FF7D6E04C; Thu, 14 Jan 2021 20:31:55 +0000 (GMT) Received: from b03ledav001.gho.boulder.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id F07A16E050; Thu, 14 Jan 2021 20:31:54 +0000 (GMT) Received: from vios4361.aus.stglabs.ibm.com (unknown [9.3.43.61]) by b03ledav001.gho.boulder.ibm.com (Postfix) with ESMTP; Thu, 14 Jan 2021 20:31:54 +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 , Brian King Subject: [PATCH v5 12/21] ibmvfc: implement channel enquiry and setup commands Date: Thu, 14 Jan 2021 14:31:39 -0600 Message-Id: <20210114203148.246656-13-tyreld@linux.ibm.com> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20210114203148.246656-1-tyreld@linux.ibm.com> References: <20210114203148.246656-1-tyreld@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.343, 18.0.737 definitions=2021-01-14_07:2021-01-14,2021-01-14 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 adultscore=0 suspectscore=0 impostorscore=0 priorityscore=1501 mlxscore=0 phishscore=0 lowpriorityscore=0 clxscore=1015 malwarescore=0 mlxlogscore=999 bulkscore=0 spamscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2009150000 definitions=main-2101140115 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 d3d7c6b53d4f..a00f38558613 100644 --- a/drivers/scsi/ibmvscsi/ibmvfc.c +++ b/drivers/scsi/ibmvscsi/ibmvfc.c @@ -909,6 +909,8 @@ static int ibmvfc_reset_crq(struct ibmvfc_host *vhost) spin_lock(vhost->crq.q_lock); vhost->state = IBMVFC_NO_CRQ; vhost->logged_in = 0; + vhost->do_enquiry = 1; + vhost->using_channels = 0; /* Clean out the queue */ memset(crq->msgs.crq, 0, PAGE_SIZE); @@ -4586,6 +4588,118 @@ 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->crq); + + 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->crq); + + 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 @@ -4667,8 +4781,14 @@ 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); + } } /** @@ -5477,9 +5597,20 @@ 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 bdafe9956649..3d76cd3c1fd9 100644 --- a/drivers/scsi/ibmvscsi/ibmvfc.h +++ b/drivers/scsi/ibmvscsi/ibmvfc.h @@ -854,10 +854,13 @@ 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;