From patchwork Tue Mar 22 10:39:38 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: John Garry X-Patchwork-Id: 553703 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 3080BC4332F for ; Tue, 22 Mar 2022 10:46:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233600AbiCVKrl (ORCPT ); Tue, 22 Mar 2022 06:47:41 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54028 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233511AbiCVKrd (ORCPT ); Tue, 22 Mar 2022 06:47:33 -0400 Received: from frasgout.his.huawei.com (frasgout.his.huawei.com [185.176.79.56]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D29AF8164B; Tue, 22 Mar 2022 03:45:57 -0700 (PDT) Received: from fraeml745-chm.china.huawei.com (unknown [172.18.147.226]) by frasgout.his.huawei.com (SkyGuard) with ESMTP id 4KN7QQ0YRSz67m9x; Tue, 22 Mar 2022 18:44:14 +0800 (CST) Received: from lhreml724-chm.china.huawei.com (10.201.108.75) by fraeml745-chm.china.huawei.com (10.206.15.226) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.24; Tue, 22 Mar 2022 11:45:55 +0100 Received: from localhost.localdomain (10.69.192.58) by lhreml724-chm.china.huawei.com (10.201.108.75) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2308.21; Tue, 22 Mar 2022 10:45:51 +0000 From: John Garry To: , , , , , , , CC: , , , , , , , John Garry Subject: [PATCH 04/11] scsi: libsas: Send SMP commands through the block layer Date: Tue, 22 Mar 2022 18:39:38 +0800 Message-ID: <1647945585-197349-5-git-send-email-john.garry@huawei.com> X-Mailer: git-send-email 2.8.1 In-Reply-To: <1647945585-197349-1-git-send-email-john.garry@huawei.com> References: <1647945585-197349-1-git-send-email-john.garry@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.69.192.58] X-ClientProxiedBy: dggems702-chm.china.huawei.com (10.3.19.179) To lhreml724-chm.china.huawei.com (10.201.108.75) X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org Send SMP commands through the block layer so that each command gets a unique tag associated. We can now also take advantage of the block layer request timeout handling. Signed-off-by: John Garry --- drivers/scsi/libsas/sas_expander.c | 38 +++++++++++++++------ drivers/scsi/libsas/sas_internal.h | 1 + drivers/scsi/libsas/sas_scsi_host.c | 53 +++++++++++++++++++++++++++++ 3 files changed, 81 insertions(+), 11 deletions(-) diff --git a/drivers/scsi/libsas/sas_expander.c b/drivers/scsi/libsas/sas_expander.c index 260e735d06fa..bd25b00912ac 100644 --- a/drivers/scsi/libsas/sas_expander.c +++ b/drivers/scsi/libsas/sas_expander.c @@ -39,10 +39,19 @@ static int smp_execute_task_sg(struct domain_device *dev, struct sas_internal *i = to_sas_internal(dev->port->ha->core.shost->transportt); struct sas_ha_struct *ha = dev->port->ha; + struct Scsi_Host *shost = ha->core.shost; + struct request_queue *request_queue; + struct request *rq; + + request_queue = sas_alloc_request_queue(shost); + if (IS_ERR(request_queue)) + return PTR_ERR(request_queue); pm_runtime_get_sync(ha->dev); mutex_lock(&dev->ex_dev.cmd_mutex); for (retry = 0; retry < 3; retry++) { + struct scsi_cmnd *scmd; + if (test_bit(SAS_DEV_GONE, &dev->state)) { res = -ECOMM; break; @@ -53,26 +62,30 @@ static int smp_execute_task_sg(struct domain_device *dev, res = -ENOMEM; break; } + + rq = scsi_alloc_request(request_queue, REQ_OP_DRV_IN, 0); + if (IS_ERR(rq)) { + res = PTR_ERR(rq); + break; + } + + scmd = blk_mq_rq_to_pdu(rq); + scmd->submitter = SUBMITTED_BY_SCSI_CUSTOM_OPS; + ASSIGN_SAS_TASK(scmd, task); + task->dev = dev; + task->uldd_task = scmd; task->task_proto = dev->tproto; task->smp_task.smp_req = *req; task->smp_task.smp_resp = *resp; - task->task_done = sas_task_internal_done; - task->slow_task->timer.function = sas_task_internal_timedout; - task->slow_task->timer.expires = jiffies + SMP_TIMEOUT*HZ; - add_timer(&task->slow_task->timer); + rq->timeout = SMP_TIMEOUT*HZ; - res = i->dft->lldd_execute_task(task, GFP_KERNEL); - - if (res) { - del_timer(&task->slow_task->timer); - pr_notice("executing SMP task failed:%d\n", res); - break; - } + blk_execute_rq_nowait(rq, true, NULL); wait_for_completion(&task->slow_task->completion); + __blk_mq_end_request(rq, BLK_STS_OK); res = -ECOMM; if ((task->task_state_flags & SAS_TASK_STATE_ABORTED)) { pr_notice("smp task timed out or aborted\n"); @@ -117,6 +130,9 @@ static int smp_execute_task_sg(struct domain_device *dev, BUG_ON(retry == 3 && task != NULL); sas_free_task(task); + + blk_cleanup_queue(request_queue); + return res; } diff --git a/drivers/scsi/libsas/sas_internal.h b/drivers/scsi/libsas/sas_internal.h index 13d0ffaada93..ca2bace16953 100644 --- a/drivers/scsi/libsas/sas_internal.h +++ b/drivers/scsi/libsas/sas_internal.h @@ -95,6 +95,7 @@ extern const work_func_t sas_port_event_fns[PORT_NUM_EVENTS]; void sas_task_internal_done(struct sas_task *task); void sas_task_internal_timedout(struct timer_list *t); +struct request_queue *sas_alloc_request_queue(struct Scsi_Host *shost); int sas_execute_tmf(struct domain_device *device, void *parameter, int para_len, int force_phy_id, struct sas_tmf_task *tmf); diff --git a/drivers/scsi/libsas/sas_scsi_host.c b/drivers/scsi/libsas/sas_scsi_host.c index 9c82e5dc4fcc..91133ad37ae8 100644 --- a/drivers/scsi/libsas/sas_scsi_host.c +++ b/drivers/scsi/libsas/sas_scsi_host.c @@ -920,6 +920,59 @@ void sas_task_internal_timedout(struct timer_list *t) #define TASK_TIMEOUT (20 * HZ) #define TASK_RETRY 3 +static enum blk_eh_timer_return sas_task_timedout(struct request *rq, bool resv) +{ + struct scsi_cmnd *scmd = blk_mq_rq_to_pdu(rq); + struct sas_task *task = TO_SAS_TASK(scmd); + bool is_completed = true; + unsigned long flags; + + spin_lock_irqsave(&task->task_state_lock, flags); + if (!(task->task_state_flags & SAS_TASK_STATE_DONE)) { + task->task_state_flags |= SAS_TASK_STATE_ABORTED; + is_completed = false; + } + spin_unlock_irqrestore(&task->task_state_lock, flags); + + if (!is_completed) + complete(&task->slow_task->completion); + return BLK_EH_DONE; +} + +static blk_status_t sas_exec_rq(struct blk_mq_hw_ctx *hctx, + const struct blk_mq_queue_data *bd) +{ + struct request *rq = bd->rq; + struct scsi_cmnd *scmd = blk_mq_rq_to_pdu(rq); + struct sas_task *task = (struct sas_task *)scmd->host_scribble; + struct domain_device *device = task->dev; + struct sas_ha_struct *ha = device->port->ha; + struct sas_internal *i = to_sas_internal(ha->core.shost->transportt); + int res; + + blk_mq_start_request(bd->rq); + + res = i->dft->lldd_execute_task(task, GFP_KERNEL); + if (res) { + pr_notice("executing task proto 0x%x failed:%d\n", task->task_proto, res); + task->task_status.resp = SAS_TASK_UNDELIVERED; + task->task_status.stat = SAS_DEVICE_UNKNOWN; + complete(&task->slow_task->completion); + } + + return BLK_STS_OK; +} + +static const struct blk_mq_ops sas_blk_mq_ops = { + .queue_rq = sas_exec_rq, + .timeout = sas_task_timedout, +}; + +struct request_queue *sas_alloc_request_queue(struct Scsi_Host *shost) +{ + return blk_mq_init_queue_ops(&shost->tag_set, &sas_blk_mq_ops); +} + static int sas_execute_internal_abort(struct domain_device *device, enum sas_internal_abort type, u16 tag, unsigned int qid, void *data)