From patchwork Sun Oct 25 23:03:14 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mike Christie X-Patchwork-Id: 11855601 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 F107C14B7 for ; Sun, 25 Oct 2020 23:03:43 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D6E18222EC for ; Sun, 25 Oct 2020 23:03:43 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=oracle.com header.i=@oracle.com header.b="aG2kVVZd" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1420354AbgJYXDj (ORCPT ); Sun, 25 Oct 2020 19:03:39 -0400 Received: from aserp2130.oracle.com ([141.146.126.79]:40702 "EHLO aserp2130.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1419475AbgJYXDh (ORCPT ); Sun, 25 Oct 2020 19:03:37 -0400 Received: from pps.filterd (aserp2130.oracle.com [127.0.0.1]) by aserp2130.oracle.com (8.16.0.42/8.16.0.42) with SMTP id 09PMxD8I149169; Sun, 25 Oct 2020 23:03:27 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h=from : to : cc : subject : date : message-id : in-reply-to : references; s=corp-2020-01-29; bh=j0e80+39/vPLi7qwyAw/9GrLFt2fQ3NQre3X7U3tIBs=; b=aG2kVVZdz0dl79JIFgbhWDGhQMbCeECFQz28sgFhWceuLag48HF/qdoNOAjhMoY4XY3K jEfkazzMHpVt9s3JxBTTAKB44k/8e9zPvahSIBii2hwLmta0udbPLB35H+OR2FSfXS1x gez9k4whHAafhzP5wfCa/F6apSGeCtGnSa3+TmFehY/MKPF5H90xkHoGWAF+5gaAvZW2 IBYfSE5+TJOFwi4eLARIi9gzSUG2ASojGnEY727zbyNULMGhy4JTgYRHKcyYyJL88lb7 2OePi1Sdp7o1EFUOr1OB5H9+DpAcDkSgzAOnI5/hx43yvV68bA4d+4nBJHK5kPaKXs68 uw== Received: from userp3020.oracle.com (userp3020.oracle.com [156.151.31.79]) by aserp2130.oracle.com with ESMTP id 34c9sajmmr-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Sun, 25 Oct 2020 23:03:27 +0000 Received: from pps.filterd (userp3020.oracle.com [127.0.0.1]) by userp3020.oracle.com (8.16.0.42/8.16.0.42) with SMTP id 09PN0Ea4140643; Sun, 25 Oct 2020 23:03:26 GMT Received: from aserv0121.oracle.com (aserv0121.oracle.com [141.146.126.235]) by userp3020.oracle.com with ESMTP id 34cx1p1t8j-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Sun, 25 Oct 2020 23:03:26 +0000 Received: from abhmp0016.oracle.com (abhmp0016.oracle.com [141.146.116.22]) by aserv0121.oracle.com (8.14.4/8.13.8) with ESMTP id 09PN3PXa013501; Sun, 25 Oct 2020 23:03:25 GMT Received: from ol2.localdomain (/73.88.28.6) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Sun, 25 Oct 2020 16:03:25 -0700 From: Mike Christie To: himanshu.madhani@oracle.com, linux-scsi@vger.kernel.org, target-devel@vger.kernel.org Cc: Nilesh Javali Subject: [PATCH 3/7] tcm qlaxx: move sess cmd list/lock to driver Date: Sun, 25 Oct 2020 18:03:14 -0500 Message-Id: <1603666998-8086-4-git-send-email-michael.christie@oracle.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1603666998-8086-1-git-send-email-michael.christie@oracle.com> References: <1603666998-8086-1-git-send-email-michael.christie@oracle.com> X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9785 signatures=668682 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 spamscore=0 phishscore=0 bulkscore=0 suspectscore=2 malwarescore=0 mlxlogscore=999 mlxscore=0 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2009150000 definitions=main-2010250174 X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9785 signatures=668682 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 mlxscore=0 impostorscore=0 mlxlogscore=999 malwarescore=0 lowpriorityscore=0 bulkscore=0 priorityscore=1501 spamscore=0 phishscore=0 clxscore=1015 suspectscore=2 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2009150000 definitions=main-2010250174 Precedence: bulk List-ID: X-Mailing-List: target-devel@vger.kernel.org Except for debug output in the shutdown path, tcm qla2xxx is the only driver using the se_session sess_cmd_list. This moves the list to that driver so in the next patches we can remove the sess_cmd_lock from the main IO path for the rest of the drivers. Cc: Nilesh Javali Cc: Himanshu Madhani Signed-off-by: Mike Christie --- drivers/scsi/qla2xxx/qla_def.h | 2 ++ drivers/scsi/qla2xxx/qla_target.c | 2 +- drivers/scsi/qla2xxx/qla_target.h | 1 + drivers/scsi/qla2xxx/tcm_qla2xxx.c | 47 +++++++++++++++++++++++--------------- 4 files changed, 32 insertions(+), 20 deletions(-) diff --git a/drivers/scsi/qla2xxx/qla_def.h b/drivers/scsi/qla2xxx/qla_def.h index a165120..b6284ad 100644 --- a/drivers/scsi/qla2xxx/qla_def.h +++ b/drivers/scsi/qla2xxx/qla_def.h @@ -2484,6 +2484,8 @@ enum rscn_addr_format { int generation; struct se_session *se_sess; + struct list_head sess_cmd_list; + spinlock_t sess_cmd_lock; struct kref sess_kref; struct qla_tgt *tgt; unsigned long expires; diff --git a/drivers/scsi/qla2xxx/qla_target.c b/drivers/scsi/qla2xxx/qla_target.c index 5c417d3..6cb4348 100644 --- a/drivers/scsi/qla2xxx/qla_target.c +++ b/drivers/scsi/qla2xxx/qla_target.c @@ -4366,7 +4366,7 @@ static int qlt_handle_cmd_for_atio(struct scsi_qla_host *vha, cmd->trc_flags |= TRC_NEW_CMD; spin_lock_irqsave(&vha->cmd_list_lock, flags); - list_add_tail(&cmd->cmd_list, &vha->qla_cmd_list); + list_add_tail(&cmd->sess_cmd_list, &vha->qla_cmd_list); spin_unlock_irqrestore(&vha->cmd_list_lock, flags); INIT_WORK(&cmd->work, qlt_do_work); diff --git a/drivers/scsi/qla2xxx/qla_target.h b/drivers/scsi/qla2xxx/qla_target.h index 1cff7c6..10e5e6c8 100644 --- a/drivers/scsi/qla2xxx/qla_target.h +++ b/drivers/scsi/qla2xxx/qla_target.h @@ -856,6 +856,7 @@ struct qla_tgt_cmd { uint8_t cmd_type; uint8_t pad[7]; struct se_cmd se_cmd; + struct list_head sess_cmd_list; struct fc_port *sess; struct qla_qpair *qpair; uint32_t reset_count; diff --git a/drivers/scsi/qla2xxx/tcm_qla2xxx.c b/drivers/scsi/qla2xxx/tcm_qla2xxx.c index 4abf24c..076e0ab 100644 --- a/drivers/scsi/qla2xxx/tcm_qla2xxx.c +++ b/drivers/scsi/qla2xxx/tcm_qla2xxx.c @@ -255,6 +255,7 @@ static void tcm_qla2xxx_free_mcmd(struct qla_tgt_mgmt_cmd *mcmd) static void tcm_qla2xxx_complete_free(struct work_struct *work) { struct qla_tgt_cmd *cmd = container_of(work, struct qla_tgt_cmd, work); + unsigned long flags; cmd->cmd_in_wq = 0; @@ -265,6 +266,10 @@ static void tcm_qla2xxx_complete_free(struct work_struct *work) cmd->trc_flags |= TRC_CMD_FREE; cmd->cmd_sent_to_fw = 0; + spin_lock_irqsave(&cmd->sess->sess_cmd_lock, flags); + list_del_init(&cmd->sess_cmd_list); + spin_unlock_irqrestore(&cmd->sess->sess_cmd_lock, flags); + transport_generic_free_cmd(&cmd->se_cmd, 0); } @@ -451,13 +456,14 @@ static int tcm_qla2xxx_handle_cmd(scsi_qla_host_t *vha, struct qla_tgt_cmd *cmd, struct se_portal_group *se_tpg; struct tcm_qla2xxx_tpg *tpg; #endif - int flags = TARGET_SCF_ACK_KREF; + int target_flags = TARGET_SCF_ACK_KREF, ret; + unsigned long flags; if (bidi) - flags |= TARGET_SCF_BIDI_OP; + target_flags |= TARGET_SCF_BIDI_OP; if (se_cmd->cpuid != WORK_CPU_UNBOUND) - flags |= TARGET_SCF_USE_CPUID; + target_flags |= TARGET_SCF_USE_CPUID; sess = cmd->sess; if (!sess) { @@ -479,11 +485,17 @@ static int tcm_qla2xxx_handle_cmd(scsi_qla_host_t *vha, struct qla_tgt_cmd *cmd, return 0; } #endif - cmd->qpair->tgt_counters.qla_core_sbt_cmd++; - return target_submit_cmd(se_cmd, se_sess, cdb, &cmd->sense_buffer[0], + ret = target_submit_cmd(se_cmd, se_sess, cdb, &cmd->sense_buffer[0], cmd->unpacked_lun, data_length, fcp_task_attr, - data_dir, flags); + data_dir, target_flags); + if (!ret) { + spin_lock_irqsave(&sess->sess_cmd_lock, flags); + list_add_tail(&cmd->sess_cmd_list, &sess->sess_cmd_list); + spin_unlock_irqrestore(&sess->sess_cmd_lock, flags); + } + + return ret; } static void tcm_qla2xxx_handle_data_work(struct work_struct *work) @@ -617,25 +629,20 @@ static int tcm_qla2xxx_handle_tmr(struct qla_tgt_mgmt_cmd *mcmd, u64 lun, static struct qla_tgt_cmd *tcm_qla2xxx_find_cmd_by_tag(struct fc_port *sess, uint64_t tag) { - struct qla_tgt_cmd *cmd = NULL; - struct se_cmd *secmd; + struct qla_tgt_cmd *cmd; unsigned long flags; if (!sess->se_sess) return NULL; - spin_lock_irqsave(&sess->se_sess->sess_cmd_lock, flags); - list_for_each_entry(secmd, &sess->se_sess->sess_cmd_list, se_cmd_list) { - /* skip task management functions, including tmr->task_cmd */ - if (secmd->se_cmd_flags & SCF_SCSI_TMR_CDB) - continue; - - if (secmd->tag == tag) { - cmd = container_of(secmd, struct qla_tgt_cmd, se_cmd); - break; - } + spin_lock_irqsave(&sess->sess_cmd_lock, flags); + list_for_each_entry(cmd, &sess->sess_cmd_list, sess_cmd_list) { + if (cmd->se_cmd.tag == tag) + goto done; } - spin_unlock_irqrestore(&sess->se_sess->sess_cmd_lock, flags); + cmd = NULL; +done: + spin_unlock_irqrestore(&sess->sess_cmd_lock, flags); return cmd; } @@ -1426,6 +1433,8 @@ static int tcm_qla2xxx_session_cb(struct se_portal_group *se_tpg, uint16_t loop_id = qlat_sess->loop_id; unsigned long flags; + INIT_LIST_HEAD(&qlat_sess->sess_cmd_list); + spin_lock_init(&qlat_sess->sess_cmd_lock); /* * And now setup se_nacl and session pointers into HW lport internal * mappings for fabric S_ID and LOOP_ID.