From patchwork Wed Sep 29 07:00:46 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Po-Wen Kao X-Patchwork-Id: 12524723 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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id C7146C433EF for ; Wed, 29 Sep 2021 07:03:34 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id AA2AD6138E for ; Wed, 29 Sep 2021 07:03:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S244395AbhI2HFO (ORCPT ); Wed, 29 Sep 2021 03:05:14 -0400 Received: from mailgw02.mediatek.com ([210.61.82.184]:55520 "EHLO mailgw02.mediatek.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S244487AbhI2HDH (ORCPT ); Wed, 29 Sep 2021 03:03:07 -0400 X-UUID: 09f38eee42fc49fd9aa086be41ebcf0d-20210929 X-UUID: 09f38eee42fc49fd9aa086be41ebcf0d-20210929 Received: from mtkcas11.mediatek.inc [(172.21.101.40)] by mailgw02.mediatek.com (envelope-from ) (Generic MTA with TLSv1.2 ECDHE-RSA-AES256-SHA384 256/256) with ESMTP id 179617446; Wed, 29 Sep 2021 15:01:20 +0800 Received: from mtkcas11.mediatek.inc (172.21.101.40) by mtkmbs10n2.mediatek.inc (172.21.101.183) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384) id 15.2.792.3; Wed, 29 Sep 2021 15:01:18 +0800 Received: from mtksdccf07.mediatek.inc (172.21.84.99) by mtkcas11.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Wed, 29 Sep 2021 15:01:18 +0800 From: Po-Wen Kao To: , , , , , , , , CC: , , , , , , , , , Subject: [PATCH 1/2] blk-mq: new busy request iterator for driver Date: Wed, 29 Sep 2021 15:00:46 +0800 Message-ID: <20210929070047.4223-2-powen.kao@mediatek.com> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20210929070047.4223-1-powen.kao@mediatek.com> References: <20210929070047.4223-1-powen.kao@mediatek.com> MIME-Version: 1.0 X-MTK: N Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org Driver occasionally execute allocated request directly without dispatching to block layer, thus request never appears in tags->rqs. To allow driver to iterate through requests in static_rqs, a new interface blk_mq_drv_tagset_busy_iter() is introduced. Signed-off-by: Po-Wen Kao --- block/blk-mq-tag.c | 36 ++++++++++++++++++++++++++++++------ include/linux/blk-mq.h | 4 ++++ 2 files changed, 34 insertions(+), 6 deletions(-) diff --git a/block/blk-mq-tag.c b/block/blk-mq-tag.c index 86f87346232a..7723689e7714 100644 --- a/block/blk-mq-tag.c +++ b/block/blk-mq-tag.c @@ -365,6 +365,31 @@ void blk_mq_all_tag_iter(struct blk_mq_tags *tags, busy_tag_iter_fn *fn, /** * blk_mq_tagset_busy_iter - iterate over all started requests in a tag set + * Refer to __blk_mq_tagset_iter() for parameter details. + */ +void blk_mq_tagset_busy_iter(struct blk_mq_tag_set *tagset, + busy_tag_iter_fn *fn, void *priv) +{ + __blk_mq_tagset_iter(tagset, fn, priv, + BT_TAG_ITER_STARTED); +} +EXPORT_SYMBOL(blk_mq_tagset_busy_iter); + +/** + * blk_mq_drv_tagset_busy_iter - iterate over all started static requests + * in a tag set. + * Refer to __blk_mq_tagset_iter() for parameter details. + */ +void blk_mq_drv_tagset_busy_iter(struct blk_mq_tag_set *tagset, + busy_tag_iter_fn *fn, void *priv) +{ + __blk_mq_tagset_iter(tagset, fn, priv, + BT_TAG_ITER_STARTED | BT_TAG_ITER_STATIC_RQS); +} +EXPORT_SYMBOL(blk_mq_drv_tagset_busy_iter); + +/** + * blk_mq_tm_tagset_busy_iter - iterate over all requests in a tagset. * @tagset: Tag set to iterate over. * @fn: Pointer to the function that will be called for each started * request. @fn will be called as follows: @fn(rq, @priv, @@ -375,19 +400,18 @@ void blk_mq_all_tag_iter(struct blk_mq_tags *tags, busy_tag_iter_fn *fn, * * We grab one request reference before calling @fn and release it after * @fn returns. + * @flags: BT_TAG_ITER_* */ -void blk_mq_tagset_busy_iter(struct blk_mq_tag_set *tagset, - busy_tag_iter_fn *fn, void *priv) +void __blk_mq_tagset_iter(struct blk_mq_tag_set *tagset, + busy_tag_iter_fn *fn, void *priv, unsigned int flags) { int i; - for (i = 0; i < tagset->nr_hw_queues; i++) { if (tagset->tags && tagset->tags[i]) - __blk_mq_all_tag_iter(tagset->tags[i], fn, priv, - BT_TAG_ITER_STARTED); + __blk_mq_all_tag_iter(tagset->tags[i], fn, priv, flags); } } -EXPORT_SYMBOL(blk_mq_tagset_busy_iter); + static bool blk_mq_tagset_count_completed_rqs(struct request *rq, void *data, bool reserved) diff --git a/include/linux/blk-mq.h b/include/linux/blk-mq.h index 13ba1861e688..29c851192093 100644 --- a/include/linux/blk-mq.h +++ b/include/linux/blk-mq.h @@ -545,6 +545,10 @@ void blk_mq_run_hw_queues(struct request_queue *q, bool async); void blk_mq_delay_run_hw_queues(struct request_queue *q, unsigned long msecs); void blk_mq_tagset_busy_iter(struct blk_mq_tag_set *tagset, busy_tag_iter_fn *fn, void *priv); +void blk_mq_drv_tagset_busy_iter(struct blk_mq_tag_set *tagset, + busy_tag_iter_fn *fn, void *priv); +void __blk_mq_tagset_iter(struct blk_mq_tag_set *tagset, + busy_tag_iter_fn *fn, void *priv, unsigned int flags); void blk_mq_tagset_wait_completed_request(struct blk_mq_tag_set *tagset); void blk_mq_freeze_queue(struct request_queue *q); void blk_mq_unfreeze_queue(struct request_queue *q);