From patchwork Fri Jun 18 09:36:06 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Wenkai Lin X-Patchwork-Id: 463208 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id C974CC48BDF for ; Fri, 18 Jun 2021 09:36:46 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B2A43613EB for ; Fri, 18 Jun 2021 09:36:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232256AbhFRJiy (ORCPT ); Fri, 18 Jun 2021 05:38:54 -0400 Received: from szxga08-in.huawei.com ([45.249.212.255]:8271 "EHLO szxga08-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232666AbhFRJiv (ORCPT ); Fri, 18 Jun 2021 05:38:51 -0400 Received: from dggemv703-chm.china.huawei.com (unknown [172.30.72.55]) by szxga08-in.huawei.com (SkyGuard) with ESMTP id 4G5twS56bLz1BNSw; Fri, 18 Jun 2021 17:31:36 +0800 (CST) Received: from dggema713-chm.china.huawei.com (10.3.20.77) by dggemv703-chm.china.huawei.com (10.3.19.46) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256) id 15.1.2176.2; Fri, 18 Jun 2021 17:36:40 +0800 Received: from localhost.localdomain (10.69.192.56) by dggema713-chm.china.huawei.com (10.3.20.77) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.2176.2; Fri, 18 Jun 2021 17:36:39 +0800 From: Wenkai Lin To: , CC: , , , Subject: [PATCH] crypto: hisilicon/qm - implement for querying hardware tasks status. Date: Fri, 18 Jun 2021 17:36:06 +0800 Message-ID: <1624008966-1395-1-git-send-email-linwenkai6@hisilicon.com> X-Mailer: git-send-email 2.7.4 MIME-Version: 1.0 X-Originating-IP: [10.69.192.56] X-ClientProxiedBy: dggems705-chm.china.huawei.com (10.3.19.182) To dggema713-chm.china.huawei.com (10.3.20.77) X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-crypto@vger.kernel.org This patch adds a function hisi_qm_is_q_updated to check if the task is ready in hardware queue when user polls an UACCE queue.This prevents users from repeatedly querying whether the accelerator has completed tasks, which wastes CPU resources. Signed-off-by: Wenkai Lin --- drivers/crypto/hisilicon/qm.c | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) diff --git a/drivers/crypto/hisilicon/qm.c b/drivers/crypto/hisilicon/qm.c index 5807094..1d67f94 100644 --- a/drivers/crypto/hisilicon/qm.c +++ b/drivers/crypto/hisilicon/qm.c @@ -2926,6 +2926,23 @@ static void hisi_qm_uacce_stop_queue(struct uacce_queue *q) hisi_qm_stop_qp(q->priv); } +static int hisi_qm_is_q_updated(struct uacce_queue *q) +{ + struct hisi_qp *qp = q->priv; + struct qm_cqe *cqe = qp->cqe + qp->qp_status.cq_head; + int updated = 0; + + while (QM_CQE_PHASE(cqe) == qp->qp_status.cqc_phase) { + /* make sure to read data from memory */ + dma_rmb(); + qm_cq_head_update(qp); + cqe = qp->cqe + qp->qp_status.cq_head; + updated = 1; + } + + return updated; +} + static void qm_set_sqctype(struct uacce_queue *q, u16 type) { struct hisi_qm *qm = q->uacce->priv; @@ -2971,6 +2988,7 @@ static const struct uacce_ops uacce_qm_ops = { .stop_queue = hisi_qm_uacce_stop_queue, .mmap = hisi_qm_uacce_mmap, .ioctl = hisi_qm_uacce_ioctl, + .is_q_updated = hisi_qm_is_q_updated, }; static int qm_alloc_uacce(struct hisi_qm *qm)