From patchwork Tue Oct 25 10:18:03 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: John Garry X-Patchwork-Id: 619469 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 4CC10C38A2D for ; Tue, 25 Oct 2022 09:50:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231961AbiJYJum (ORCPT ); Tue, 25 Oct 2022 05:50:42 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33320 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231806AbiJYJt5 (ORCPT ); Tue, 25 Oct 2022 05:49:57 -0400 Received: from frasgout.his.huawei.com (frasgout.his.huawei.com [185.176.79.56]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 50A2615746D; Tue, 25 Oct 2022 02:48:33 -0700 (PDT) Received: from frapeml500005.china.huawei.com (unknown [172.18.147.207]) by frasgout.his.huawei.com (SkyGuard) with ESMTP id 4MxRtQ3D83z6HJMX; Tue, 25 Oct 2022 17:47:10 +0800 (CST) Received: from lhrpeml500003.china.huawei.com (7.191.162.67) by frapeml500005.china.huawei.com (7.182.85.13) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.31; Tue, 25 Oct 2022 11:48:31 +0200 Received: from localhost.localdomain (10.69.192.58) by lhrpeml500003.china.huawei.com (7.191.162.67) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.31; Tue, 25 Oct 2022 10:48:27 +0100 From: John Garry To: , , , , , , , , , CC: , , , , , John Garry Subject: [PATCH RFC v3 09/22] scsi: libsas: Add sas_alloc_slow_task_rq() Date: Tue, 25 Oct 2022 18:18:03 +0800 Message-ID: <1666693096-180008-10-git-send-email-john.garry@huawei.com> X-Mailer: git-send-email 2.8.1 In-Reply-To: <1666693096-180008-1-git-send-email-john.garry@huawei.com> References: <1666693096-180008-1-git-send-email-john.garry@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.69.192.58] X-ClientProxiedBy: dggems705-chm.china.huawei.com (10.3.19.182) To lhrpeml500003.china.huawei.com (7.191.162.67) X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org Add a function to add a slow task with a request associated. The next step will be to send tasks same as we do for other requests - through the block layer. Signed-off-by: John Garry --- drivers/scsi/libsas/sas_init.c | 51 ++++++++++++++++++++++++++++++ drivers/scsi/libsas/sas_internal.h | 1 + include/scsi/libsas.h | 2 +- 3 files changed, 53 insertions(+), 1 deletion(-) diff --git a/drivers/scsi/libsas/sas_init.c b/drivers/scsi/libsas/sas_init.c index f2c05ebeb72f..90e63ff5e966 100644 --- a/drivers/scsi/libsas/sas_init.c +++ b/drivers/scsi/libsas/sas_init.c @@ -56,9 +56,60 @@ struct sas_task *sas_alloc_slow_task(gfp_t flags) return task; } +struct sas_task *sas_alloc_slow_task_rq(struct domain_device *device, gfp_t flags) +{ + struct sas_ha_struct *sas_ha = device->port->ha; + struct Scsi_Host *shost = sas_ha->core.shost; + struct scsi_device *sdev, *found_sdev = NULL; + struct scsi_cmnd *scmd; + struct sas_task *task; + struct request *rq; + + shost_for_each_device(sdev, shost) { + struct scsi_target *starget = sdev->sdev_target; + + if (starget->hostdata == device) { + found_sdev = sdev; + break; + } + } + + if (!found_sdev) + return NULL; + + scsi_device_put(found_sdev); + + task = sas_alloc_slow_task(flags); + if (!task) + return NULL; + + task->dev = device; + + rq = scsi_alloc_request(sdev->request_queue, REQ_OP_DRV_IN, + BLK_MQ_REQ_RESERVED | BLK_MQ_REQ_NOWAIT); + if (IS_ERR(rq)) { + sas_free_task(task); + return NULL; + } + + scmd = blk_mq_rq_to_pdu(rq); + + task->uldd_task = scmd; + rq->end_io_data = task; + + return task; +} + void sas_free_task(struct sas_task *task) { if (task) { + if (task->slow_task && task->uldd_task) { + struct scsi_cmnd *scmd = task->uldd_task; + struct request *rq = scsi_cmd_to_rq(scmd); + + BUG_ON(!blk_mq_is_reserved_rq(rq)); + blk_mq_free_request(rq); + } kfree(task->slow_task); kmem_cache_free(sas_task_cache, task); } diff --git a/drivers/scsi/libsas/sas_internal.h b/drivers/scsi/libsas/sas_internal.h index 6cf190ade35e..f5ae4de382f7 100644 --- a/drivers/scsi/libsas/sas_internal.h +++ b/drivers/scsi/libsas/sas_internal.h @@ -54,6 +54,7 @@ void sas_free_event(struct asd_sas_event *event); struct sas_task *sas_alloc_task(gfp_t flags); struct sas_task *sas_alloc_slow_task(gfp_t flags); +struct sas_task *sas_alloc_slow_task_rq(struct domain_device *device, gfp_t flags); void sas_free_task(struct sas_task *task); int sas_register_ports(struct sas_ha_struct *sas_ha); diff --git a/include/scsi/libsas.h b/include/scsi/libsas.h index 1aee3d0ebbb2..4c4d8c91b1c1 100644 --- a/include/scsi/libsas.h +++ b/include/scsi/libsas.h @@ -648,7 +648,7 @@ static inline struct request *sas_task_find_rq(struct sas_task *task) { struct scsi_cmnd *scmd; - if (task->task_proto & SAS_PROTOCOL_STP_ALL) { + if (!task->slow_task && task->task_proto & SAS_PROTOCOL_STP_ALL) { struct ata_queued_cmd *qc = task->uldd_task; scmd = qc ? qc->scsicmd : NULL;