From patchwork Wed Sep 28 12:27:09 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: John Garry X-Patchwork-Id: 610520 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 DF975C54EE9 for ; Wed, 28 Sep 2022 12:33:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233948AbiI1Md4 (ORCPT ); Wed, 28 Sep 2022 08:33:56 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51200 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233954AbiI1Mdy (ORCPT ); Wed, 28 Sep 2022 08:33:54 -0400 Received: from frasgout.his.huawei.com (frasgout.his.huawei.com [185.176.79.56]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 452C89C200; Wed, 28 Sep 2022 05:33:52 -0700 (PDT) Received: from fraeml712-chm.china.huawei.com (unknown [172.18.147.200]) by frasgout.his.huawei.com (SkyGuard) with ESMTP id 4Mcwql6nlrz6H75m; Wed, 28 Sep 2022 20:32:35 +0800 (CST) Received: from lhrpeml500003.china.huawei.com (7.191.162.67) by fraeml712-chm.china.huawei.com (10.206.15.61) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.31; Wed, 28 Sep 2022 14:33:50 +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; Wed, 28 Sep 2022 13:33:46 +0100 From: John Garry To: , , , CC: , , , , , , , John Garry Subject: [PATCH 1/6] scsi: libsas: Add sas_task_find_rq() Date: Wed, 28 Sep 2022 20:27:09 +0800 Message-ID: <1664368034-114991-2-git-send-email-john.garry@huawei.com> X-Mailer: git-send-email 2.8.1 In-Reply-To: <1664368034-114991-1-git-send-email-john.garry@huawei.com> References: <1664368034-114991-1-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 lhrpeml500003.china.huawei.com (7.191.162.67) X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org blk-mq already provides a unique tag per request. Some libsas LLDDs - like hisi_sas - already use this tag as the unique per-IO HW tag. Add a common function to provide the request associated with a sas_task for all libsas LLDDs. Signed-off-by: John Garry --- include/scsi/libsas.h | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+) diff --git a/include/scsi/libsas.h b/include/scsi/libsas.h index f86b56bf7833..bc51756a3317 100644 --- a/include/scsi/libsas.h +++ b/include/scsi/libsas.h @@ -644,6 +644,28 @@ static inline bool sas_is_internal_abort(struct sas_task *task) return task->task_proto == SAS_PROTOCOL_INTERNAL_ABORT; } +static inline struct request *sas_task_find_rq(struct sas_task *task) +{ + struct scsi_cmnd *scmd; + + if (!task || !task->uldd_task) + return NULL; + + if (task->task_proto & SAS_PROTOCOL_STP_ALL) { + struct ata_queued_cmd *qc; + + qc = task->uldd_task; + scmd = qc->scsicmd; + } else { + scmd = task->uldd_task; + } + + if (!scmd) + return NULL; + + return scsi_cmd_to_rq(scmd); +} + struct sas_domain_function_template { /* The class calls these to notify the LLDD of an event. */ void (*lldd_port_formed)(struct asd_sas_phy *); From patchwork Wed Sep 28 12:27:10 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: John Garry X-Patchwork-Id: 610840 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 2996BC32771 for ; Wed, 28 Sep 2022 12:34:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233961AbiI1MeC (ORCPT ); Wed, 28 Sep 2022 08:34:02 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51378 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233972AbiI1Md6 (ORCPT ); Wed, 28 Sep 2022 08:33:58 -0400 Received: from frasgout.his.huawei.com (frasgout.his.huawei.com [185.176.79.56]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A1D939B862; Wed, 28 Sep 2022 05:33:55 -0700 (PDT) Received: from fraeml711-chm.china.huawei.com (unknown [172.18.147.207]) by frasgout.his.huawei.com (SkyGuard) with ESMTP id 4Mcwpq0lsvz67KPY; Wed, 28 Sep 2022 20:31:47 +0800 (CST) Received: from lhrpeml500003.china.huawei.com (7.191.162.67) by fraeml711-chm.china.huawei.com (10.206.15.60) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.31; Wed, 28 Sep 2022 14:33:53 +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; Wed, 28 Sep 2022 13:33:50 +0100 From: John Garry To: , , , CC: , , , , , , , John Garry Subject: [PATCH 2/6] scsi: hisi_sas: Use sas_task_find_rq() Date: Wed, 28 Sep 2022 20:27:10 +0800 Message-ID: <1664368034-114991-3-git-send-email-john.garry@huawei.com> X-Mailer: git-send-email 2.8.1 In-Reply-To: <1664368034-114991-1-git-send-email-john.garry@huawei.com> References: <1664368034-114991-1-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 lhrpeml500003.china.huawei.com (7.191.162.67) X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org Use sas_task_find_rq() to lookup the request per task for its driver tag. Signed-off-by: John Garry --- drivers/scsi/hisi_sas/hisi_sas_main.c | 26 ++++++++------------------ 1 file changed, 8 insertions(+), 18 deletions(-) diff --git a/drivers/scsi/hisi_sas/hisi_sas_main.c b/drivers/scsi/hisi_sas/hisi_sas_main.c index 4c37ae9eb6b6..1011dffed51f 100644 --- a/drivers/scsi/hisi_sas/hisi_sas_main.c +++ b/drivers/scsi/hisi_sas/hisi_sas_main.c @@ -177,13 +177,13 @@ static void hisi_sas_slot_index_set(struct hisi_hba *hisi_hba, int slot_idx) } static int hisi_sas_slot_index_alloc(struct hisi_hba *hisi_hba, - struct scsi_cmnd *scsi_cmnd) + struct request *rq) { int index; void *bitmap = hisi_hba->slot_index_tags; - if (scsi_cmnd) - return scsi_cmd_to_rq(scsi_cmnd)->tag; + if (rq) + return rq->tag; spin_lock(&hisi_hba->lock); index = find_next_zero_bit(bitmap, hisi_hba->slot_index_count, @@ -461,11 +461,11 @@ static int hisi_sas_queue_command(struct sas_task *task, gfp_t gfp_flags) struct asd_sas_port *sas_port = device->port; struct hisi_sas_device *sas_dev = device->lldd_dev; bool internal_abort = sas_is_internal_abort(task); - struct scsi_cmnd *scmd = NULL; struct hisi_sas_dq *dq = NULL; struct hisi_sas_port *port; struct hisi_hba *hisi_hba; struct hisi_sas_slot *slot; + struct request *rq = NULL; struct device *dev; int rc; @@ -520,22 +520,12 @@ static int hisi_sas_queue_command(struct sas_task *task, gfp_t gfp_flags) return -ECOMM; } - if (task->uldd_task) { - struct ata_queued_cmd *qc; - - if (dev_is_sata(device)) { - qc = task->uldd_task; - scmd = qc->scsicmd; - } else { - scmd = task->uldd_task; - } - } - - if (scmd) { + rq = sas_task_find_rq(task); + if (rq) { unsigned int dq_index; u32 blk_tag; - blk_tag = blk_mq_unique_tag(scsi_cmd_to_rq(scmd)); + blk_tag = blk_mq_unique_tag(rq); dq_index = blk_mq_unique_tag_to_hwq(blk_tag); dq = &hisi_hba->dq[dq_index]; } else { @@ -580,7 +570,7 @@ static int hisi_sas_queue_command(struct sas_task *task, gfp_t gfp_flags) if (!internal_abort && hisi_hba->hw->slot_index_alloc) rc = hisi_hba->hw->slot_index_alloc(hisi_hba, device); else - rc = hisi_sas_slot_index_alloc(hisi_hba, scmd); + rc = hisi_sas_slot_index_alloc(hisi_hba, rq); if (rc < 0) goto err_out_dif_dma_unmap; From patchwork Wed Sep 28 12:27:11 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: John Garry X-Patchwork-Id: 610519 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 C7B9AC32771 for ; Wed, 28 Sep 2022 12:34:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234008AbiI1MeI (ORCPT ); Wed, 28 Sep 2022 08:34:08 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51510 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233968AbiI1MeD (ORCPT ); Wed, 28 Sep 2022 08:34:03 -0400 Received: from frasgout.his.huawei.com (frasgout.his.huawei.com [185.176.79.56]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C179A9C7C4; Wed, 28 Sep 2022 05:33:58 -0700 (PDT) Received: from fraeml707-chm.china.huawei.com (unknown [172.18.147.206]) by frasgout.his.huawei.com (SkyGuard) with ESMTP id 4Mcwpt1crfz67MLY; Wed, 28 Sep 2022 20:31:50 +0800 (CST) Received: from lhrpeml500003.china.huawei.com (7.191.162.67) by fraeml707-chm.china.huawei.com (10.206.15.35) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.31; Wed, 28 Sep 2022 14:33:56 +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; Wed, 28 Sep 2022 13:33:53 +0100 From: John Garry To: , , , CC: , , , , , , , John Garry Subject: [PATCH 3/6] scsi: pm8001: Remove pm8001_tag_init() Date: Wed, 28 Sep 2022 20:27:11 +0800 Message-ID: <1664368034-114991-4-git-send-email-john.garry@huawei.com> X-Mailer: git-send-email 2.8.1 In-Reply-To: <1664368034-114991-1-git-send-email-john.garry@huawei.com> References: <1664368034-114991-1-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 lhrpeml500003.china.huawei.com (7.191.162.67) X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org From: Igor Pylypiv In commit 5a141315ed7c ("scsi: pm80xx: Increase the number of outstanding I/O supported to 1024") the pm8001_ha->tags allocation was moved into pm8001_init_ccb_tag(). This changed the execution order of allocation. pm8001_tag_init() used to be called after the pm8001_ha->tags allocation and now it is called before the allocation. Before: pm8001_pci_probe() `--> pm8001_pci_alloc() `--> pm8001_alloc() `--> pm8001_ha->tags = kzalloc(...) `--> pm8001_tag_init(pm8001_ha); // OK: tags are allocated After: pm8001_pci_probe() `--> pm8001_pci_alloc() | `--> pm8001_alloc() | `--> pm8001_tag_init(pm8001_ha); // NOK: tags are not allocated | `--> pm8001_init_ccb_tag() `--> pm8001_ha->tags = kzalloc(...) // today it is bitmap_zalloc() Since pm8001_ha->tags_num is zero when pm8001_tag_init() is called it does nothing. Tags memory is allocated with bitmap_zalloc() so there is no need to manually clear each bit with pm8001_tag_free(). Reviewed-by: Changyuan Lyu Signed-off-by: Igor Pylypiv Signed-off-by: John Garry Reviewed-by: Damien Le Moal --- drivers/scsi/pm8001/pm8001_init.c | 2 -- drivers/scsi/pm8001/pm8001_sas.c | 7 ------- drivers/scsi/pm8001/pm8001_sas.h | 1 - 3 files changed, 10 deletions(-) diff --git a/drivers/scsi/pm8001/pm8001_init.c b/drivers/scsi/pm8001/pm8001_init.c index a0028e130a7e..0edc9857a8bd 100644 --- a/drivers/scsi/pm8001/pm8001_init.c +++ b/drivers/scsi/pm8001/pm8001_init.c @@ -436,8 +436,6 @@ static int pm8001_alloc(struct pm8001_hba_info *pm8001_ha, atomic_set(&pm8001_ha->devices[i].running_req, 0); } pm8001_ha->flags = PM8001F_INIT_TIME; - /* Initialize tags */ - pm8001_tag_init(pm8001_ha); return 0; err_out_nodev: diff --git a/drivers/scsi/pm8001/pm8001_sas.c b/drivers/scsi/pm8001/pm8001_sas.c index d5ec29f69be3..066dfa9f4683 100644 --- a/drivers/scsi/pm8001/pm8001_sas.c +++ b/drivers/scsi/pm8001/pm8001_sas.c @@ -96,13 +96,6 @@ int pm8001_tag_alloc(struct pm8001_hba_info *pm8001_ha, u32 *tag_out) return 0; } -void pm8001_tag_init(struct pm8001_hba_info *pm8001_ha) -{ - int i; - for (i = 0; i < pm8001_ha->tags_num; ++i) - pm8001_tag_free(pm8001_ha, i); -} - /** * pm8001_mem_alloc - allocate memory for pm8001. * @pdev: pci device. diff --git a/drivers/scsi/pm8001/pm8001_sas.h b/drivers/scsi/pm8001/pm8001_sas.h index 8ab0654327f9..9acaadf02150 100644 --- a/drivers/scsi/pm8001/pm8001_sas.h +++ b/drivers/scsi/pm8001/pm8001_sas.h @@ -632,7 +632,6 @@ extern struct workqueue_struct *pm8001_wq; /******************** function prototype *********************/ int pm8001_tag_alloc(struct pm8001_hba_info *pm8001_ha, u32 *tag_out); -void pm8001_tag_init(struct pm8001_hba_info *pm8001_ha); u32 pm8001_get_ncq_tag(struct sas_task *task, u32 *tag); void pm8001_ccb_task_free(struct pm8001_hba_info *pm8001_ha, struct pm8001_ccb_info *ccb); From patchwork Wed Sep 28 12:27:12 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: John Garry X-Patchwork-Id: 610839 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 5774CC32771 for ; Wed, 28 Sep 2022 12:34:24 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234047AbiI1MeX (ORCPT ); Wed, 28 Sep 2022 08:34:23 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51464 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234011AbiI1MeJ (ORCPT ); Wed, 28 Sep 2022 08:34:09 -0400 Received: from frasgout.his.huawei.com (frasgout.his.huawei.com [185.176.79.56]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 06F789B861; Wed, 28 Sep 2022 05:34:01 -0700 (PDT) Received: from fraeml737-chm.china.huawei.com (unknown [172.18.147.207]) by frasgout.his.huawei.com (SkyGuard) with ESMTP id 4Mcwqx2vYkz6864m; Wed, 28 Sep 2022 20:32:45 +0800 (CST) Received: from lhrpeml500003.china.huawei.com (7.191.162.67) by fraeml737-chm.china.huawei.com (10.206.15.218) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.31; Wed, 28 Sep 2022 14:33:59 +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; Wed, 28 Sep 2022 13:33:56 +0100 From: John Garry To: , , , CC: , , , , , , , John Garry Subject: [PATCH 4/6] scsi: pm8001: Use sas_task_find_rq() for tagging Date: Wed, 28 Sep 2022 20:27:12 +0800 Message-ID: <1664368034-114991-5-git-send-email-john.garry@huawei.com> X-Mailer: git-send-email 2.8.1 In-Reply-To: <1664368034-114991-1-git-send-email-john.garry@huawei.com> References: <1664368034-114991-1-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 lhrpeml500003.china.huawei.com (7.191.162.67) X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org The request associated with a scsi command coming from the block layer has a unique tag, so use that when possible for getting a CCB. Unfortunately we don't support reserved commands in the SCSI midlayer yet, so in the interim continue to manage those tags internally (along with tags for private commands). Signed-off-by: John Garry --- drivers/scsi/pm8001/pm8001_init.c | 10 ++++------ drivers/scsi/pm8001/pm8001_sas.c | 8 ++++++++ drivers/scsi/pm8001/pm8001_sas.h | 6 +++++- 3 files changed, 17 insertions(+), 7 deletions(-) diff --git a/drivers/scsi/pm8001/pm8001_init.c b/drivers/scsi/pm8001/pm8001_init.c index 0edc9857a8bd..0868836e7391 100644 --- a/drivers/scsi/pm8001/pm8001_init.c +++ b/drivers/scsi/pm8001/pm8001_init.c @@ -1208,17 +1208,14 @@ static int pm8001_init_ccb_tag(struct pm8001_hba_info *pm8001_ha) struct Scsi_Host *shost = pm8001_ha->shost; struct device *dev = pm8001_ha->dev; u32 max_out_io, ccb_count; - u32 can_queue; int i; max_out_io = pm8001_ha->main_cfg_tbl.pm80xx_tbl.max_out_io; ccb_count = min_t(int, PM8001_MAX_CCB, max_out_io); - /* Update to the scsi host*/ - can_queue = ccb_count - PM8001_RESERVE_SLOT; - shost->can_queue = can_queue; + shost->can_queue = ccb_count - PM8001_RESERVE_SLOT; - pm8001_ha->tags = bitmap_zalloc(ccb_count, GFP_KERNEL); + pm8001_ha->tags = bitmap_zalloc(PM8001_RESERVE_SLOT, GFP_KERNEL); if (!pm8001_ha->tags) goto err_out; @@ -1244,9 +1241,10 @@ static int pm8001_init_ccb_tag(struct pm8001_hba_info *pm8001_ha) pm8001_ha->ccb_info[i].task = NULL; pm8001_ha->ccb_info[i].ccb_tag = PM8001_INVALID_TAG; pm8001_ha->ccb_info[i].device = NULL; - ++pm8001_ha->tags_num; } + pm8001_ha->tags_num = PM8001_RESERVE_SLOT; + return 0; err_out_noccb: diff --git a/drivers/scsi/pm8001/pm8001_sas.c b/drivers/scsi/pm8001/pm8001_sas.c index 066dfa9f4683..9d25855af657 100644 --- a/drivers/scsi/pm8001/pm8001_sas.c +++ b/drivers/scsi/pm8001/pm8001_sas.c @@ -68,6 +68,11 @@ void pm8001_tag_free(struct pm8001_hba_info *pm8001_ha, u32 tag) void *bitmap = pm8001_ha->tags; unsigned long flags; + if (tag < pm8001_ha->shost->can_queue) + return; + + tag -= pm8001_ha->shost->can_queue; + spin_lock_irqsave(&pm8001_ha->bitmap_lock, flags); __clear_bit(tag, bitmap); spin_unlock_irqrestore(&pm8001_ha->bitmap_lock, flags); @@ -92,6 +97,9 @@ int pm8001_tag_alloc(struct pm8001_hba_info *pm8001_ha, u32 *tag_out) } __set_bit(tag, bitmap); spin_unlock_irqrestore(&pm8001_ha->bitmap_lock, flags); + + /* reserved tags are in the upper region of the tagset */ + tag += pm8001_ha->shost->can_queue; *tag_out = tag; return 0; } diff --git a/drivers/scsi/pm8001/pm8001_sas.h b/drivers/scsi/pm8001/pm8001_sas.h index 9acaadf02150..9ff8d1fa84b0 100644 --- a/drivers/scsi/pm8001/pm8001_sas.h +++ b/drivers/scsi/pm8001/pm8001_sas.h @@ -737,9 +737,13 @@ pm8001_ccb_alloc(struct pm8001_hba_info *pm8001_ha, struct pm8001_device *dev, struct sas_task *task) { struct pm8001_ccb_info *ccb; + struct request *rq = NULL; u32 tag; - if (pm8001_tag_alloc(pm8001_ha, &tag)) { + rq = sas_task_find_rq(task); + if (rq) { + tag = rq->tag; + } else if (pm8001_tag_alloc(pm8001_ha, &tag)) { pm8001_dbg(pm8001_ha, FAIL, "Failed to allocate a tag\n"); return NULL; } From patchwork Wed Sep 28 12:27:13 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: John Garry X-Patchwork-Id: 610838 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 04920C32771 for ; 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Wed, 28 Sep 2022 13:33:59 +0100 From: John Garry To: , , , CC: , , , , , , , John Garry Subject: [PATCH 5/6] scsi: mvsas: Delete mvs_tag_init() Date: Wed, 28 Sep 2022 20:27:13 +0800 Message-ID: <1664368034-114991-6-git-send-email-john.garry@huawei.com> X-Mailer: git-send-email 2.8.1 In-Reply-To: <1664368034-114991-1-git-send-email-john.garry@huawei.com> References: <1664368034-114991-1-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 lhrpeml500003.china.huawei.com (7.191.162.67) X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org All mvs_tag_init() does is zero the tag bitmap, but this is already done with the kzalloc() call to alloc the tags, so delete this unneeded function. Signed-off-by: John Garry Reviewed-by: Damien Le Moal --- drivers/scsi/mvsas/mv_init.c | 2 -- drivers/scsi/mvsas/mv_sas.c | 7 ------- drivers/scsi/mvsas/mv_sas.h | 1 - 3 files changed, 10 deletions(-) diff --git a/drivers/scsi/mvsas/mv_init.c b/drivers/scsi/mvsas/mv_init.c index 2fde496fff5f..c85fb812ad43 100644 --- a/drivers/scsi/mvsas/mv_init.c +++ b/drivers/scsi/mvsas/mv_init.c @@ -286,8 +286,6 @@ static int mvs_alloc(struct mvs_info *mvi, struct Scsi_Host *shost) } mvi->tags_num = slot_nr; - /* Initialize tags */ - mvs_tag_init(mvi); return 0; err_out: return 1; diff --git a/drivers/scsi/mvsas/mv_sas.c b/drivers/scsi/mvsas/mv_sas.c index a6867dae0e7c..0810e6c930e1 100644 --- a/drivers/scsi/mvsas/mv_sas.c +++ b/drivers/scsi/mvsas/mv_sas.c @@ -51,13 +51,6 @@ inline int mvs_tag_alloc(struct mvs_info *mvi, u32 *tag_out) return 0; } -void mvs_tag_init(struct mvs_info *mvi) -{ - int i; - for (i = 0; i < mvi->tags_num; ++i) - mvs_tag_clear(mvi, i); -} - static struct mvs_info *mvs_find_dev_mvi(struct domain_device *dev) { unsigned long i = 0, j = 0, hi = 0; diff --git a/drivers/scsi/mvsas/mv_sas.h b/drivers/scsi/mvsas/mv_sas.h index 509d8f32a04f..fe57665bdb50 100644 --- a/drivers/scsi/mvsas/mv_sas.h +++ b/drivers/scsi/mvsas/mv_sas.h @@ -428,7 +428,6 @@ void mvs_tag_clear(struct mvs_info *mvi, u32 tag); void mvs_tag_free(struct mvs_info *mvi, u32 tag); void mvs_tag_set(struct mvs_info *mvi, unsigned int tag); int mvs_tag_alloc(struct mvs_info *mvi, u32 *tag_out); -void mvs_tag_init(struct mvs_info *mvi); void mvs_iounmap(void __iomem *regs); int mvs_ioremap(struct mvs_info *mvi, int bar, int bar_ex); void mvs_phys_reset(struct mvs_info *mvi, u32 phy_mask, int hard); From patchwork Wed Sep 28 12:27:14 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: John Garry X-Patchwork-Id: 610518 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 1071DC04A95 for ; Wed, 28 Sep 2022 12:34:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234060AbiI1Mea (ORCPT ); Wed, 28 Sep 2022 08:34:30 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52092 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234028AbiI1MeP (ORCPT ); Wed, 28 Sep 2022 08:34:15 -0400 Received: from frasgout.his.huawei.com (frasgout.his.huawei.com [185.176.79.56]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0051E9C2FC; Wed, 28 Sep 2022 05:34:08 -0700 (PDT) Received: from fraeml734-chm.china.huawei.com (unknown [172.18.147.206]) by frasgout.his.huawei.com (SkyGuard) with ESMTP id 4Mcwr36m9yz6H75m; Wed, 28 Sep 2022 20:32:51 +0800 (CST) Received: from lhrpeml500003.china.huawei.com (7.191.162.67) by fraeml734-chm.china.huawei.com (10.206.15.215) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.31; Wed, 28 Sep 2022 14:34:06 +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; Wed, 28 Sep 2022 13:34:02 +0100 From: John Garry To: , , , CC: , , , , , , , John Garry Subject: [PATCH 6/6] scsi: mvsas: Use sas_task_find_rq() for tagging Date: Wed, 28 Sep 2022 20:27:14 +0800 Message-ID: <1664368034-114991-7-git-send-email-john.garry@huawei.com> X-Mailer: git-send-email 2.8.1 In-Reply-To: <1664368034-114991-1-git-send-email-john.garry@huawei.com> References: <1664368034-114991-1-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 lhrpeml500003.china.huawei.com (7.191.162.67) X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org The request associated with a scsi command coming from the block layer has a unique tag, so use that when possible for getting a slot. Unfortunately we don't support reserved commands in the SCSI midlayer yet. As such, SMP tasks - as an example - will not have a request associated, so in the interim continue to manage those tags for that type of sas_task internally. We reserve an arbitrary 4 tags for these internal tags. Indeed, we already decrement MVS_RSVD_SLOTS by 2 for the shost can_queue when flag MVF_FLAG_SOC is set. This change was made in commit 20b09c2992fef ("[PATCH] [SCSI] mvsas: add support for 94xx; layout change; bug fixes"), but what those 2 slots are used for is not obvious. Signed-off-by: John Garry --- drivers/scsi/mvsas/mv_defs.h | 1 + drivers/scsi/mvsas/mv_init.c | 4 ++-- drivers/scsi/mvsas/mv_sas.c | 22 +++++++++++++++++----- drivers/scsi/mvsas/mv_sas.h | 1 - 4 files changed, 20 insertions(+), 8 deletions(-) diff --git a/drivers/scsi/mvsas/mv_defs.h b/drivers/scsi/mvsas/mv_defs.h index 7123a2efbf58..8ef174cd4d37 100644 --- a/drivers/scsi/mvsas/mv_defs.h +++ b/drivers/scsi/mvsas/mv_defs.h @@ -40,6 +40,7 @@ enum driver_configuration { MVS_ATA_CMD_SZ = 96, /* SATA command table buffer size */ MVS_OAF_SZ = 64, /* Open address frame buffer size */ MVS_QUEUE_SIZE = 64, /* Support Queue depth */ + MVS_RSVD_SLOTS = 4, MVS_SOC_CAN_QUEUE = MVS_SOC_SLOTS - 2, }; diff --git a/drivers/scsi/mvsas/mv_init.c b/drivers/scsi/mvsas/mv_init.c index c85fb812ad43..d834ed9e8e4a 100644 --- a/drivers/scsi/mvsas/mv_init.c +++ b/drivers/scsi/mvsas/mv_init.c @@ -284,7 +284,7 @@ static int mvs_alloc(struct mvs_info *mvi, struct Scsi_Host *shost) printk(KERN_DEBUG "failed to create dma pool %s.\n", pool_name); goto err_out; } - mvi->tags_num = slot_nr; + mvi->tags_num = MVS_RSVD_SLOTS; return 0; err_out: @@ -367,7 +367,7 @@ static struct mvs_info *mvs_pci_alloc(struct pci_dev *pdev, mvi->sas = sha; mvi->shost = shost; - mvi->tags = kzalloc(MVS_CHIP_SLOT_SZ>>3, GFP_KERNEL); + mvi->tags = kzalloc(MVS_RSVD_SLOTS, GFP_KERNEL); if (!mvi->tags) goto err_out; diff --git a/drivers/scsi/mvsas/mv_sas.c b/drivers/scsi/mvsas/mv_sas.c index 0810e6c930e1..549d2ec89f60 100644 --- a/drivers/scsi/mvsas/mv_sas.c +++ b/drivers/scsi/mvsas/mv_sas.c @@ -20,7 +20,7 @@ static int mvs_find_tag(struct mvs_info *mvi, struct sas_task *task, u32 *tag) return 0; } -void mvs_tag_clear(struct mvs_info *mvi, u32 tag) +static void mvs_tag_clear(struct mvs_info *mvi, u32 tag) { void *bitmap = mvi->tags; clear_bit(tag, bitmap); @@ -28,6 +28,11 @@ void mvs_tag_clear(struct mvs_info *mvi, u32 tag) void mvs_tag_free(struct mvs_info *mvi, u32 tag) { + if (tag < mvi->shost->can_queue) + return; + + tag -= mvi->shost->can_queue; + mvs_tag_clear(mvi, tag); } @@ -47,6 +52,7 @@ inline int mvs_tag_alloc(struct mvs_info *mvi, u32 *tag_out) if (tag >= mvi->tags_num) return -SAS_QUEUE_FULL; mvs_tag_set(mvi, tag); + tag += mvi->shost->can_queue; *tag_out = tag; return 0; } @@ -696,6 +702,7 @@ static int mvs_task_prep(struct sas_task *task, struct mvs_info *mvi, int is_tmf struct mvs_task_exec_info tei; struct mvs_slot_info *slot; u32 tag = 0xdeadbeef, n_elem = 0; + struct request *rq; int rc = 0; if (!dev->port) { @@ -760,9 +767,14 @@ static int mvs_task_prep(struct sas_task *task, struct mvs_info *mvi, int is_tmf n_elem = task->num_scatter; } - rc = mvs_tag_alloc(mvi, &tag); - if (rc) - goto err_out; + rq = sas_task_find_rq(task); + if (rq) { + tag = rq->tag; + } else { + rc = mvs_tag_alloc(mvi, &tag); + if (rc) + goto err_out; + } slot = &mvi->slot_info[tag]; @@ -857,7 +869,7 @@ int mvs_queue_command(struct sas_task *task, gfp_t gfp_flags) static void mvs_slot_free(struct mvs_info *mvi, u32 rx_desc) { u32 slot_idx = rx_desc & RXQ_SLOT_MASK; - mvs_tag_clear(mvi, slot_idx); + mvs_tag_free(mvi, slot_idx); } static void mvs_slot_task_free(struct mvs_info *mvi, struct sas_task *task, diff --git a/drivers/scsi/mvsas/mv_sas.h b/drivers/scsi/mvsas/mv_sas.h index fe57665bdb50..e6c70786ded9 100644 --- a/drivers/scsi/mvsas/mv_sas.h +++ b/drivers/scsi/mvsas/mv_sas.h @@ -424,7 +424,6 @@ struct mvs_task_exec_info { /******************** function prototype *********************/ void mvs_get_sas_addr(void *buf, u32 buflen); -void mvs_tag_clear(struct mvs_info *mvi, u32 tag); void mvs_tag_free(struct mvs_info *mvi, u32 tag); void mvs_tag_set(struct mvs_info *mvi, unsigned int tag); int mvs_tag_alloc(struct mvs_info *mvi, u32 *tag_out);