From patchwork Sat Sep 19 02:02:27 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bhaumik Bhatt X-Patchwork-Id: 11786555 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 86572112E for ; Sat, 19 Sep 2020 02:03:17 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 686F421707 for ; Sat, 19 Sep 2020 02:03:17 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=mg.codeaurora.org header.i=@mg.codeaurora.org header.b="nxlG7hBF" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726440AbgISCDI (ORCPT ); Fri, 18 Sep 2020 22:03:08 -0400 Received: from so254-54.mailgun.net ([198.61.254.54]:49074 "EHLO so254-54.mailgun.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726405AbgISCDC (ORCPT ); Fri, 18 Sep 2020 22:03:02 -0400 DKIM-Signature: a=rsa-sha256; v=1; c=relaxed/relaxed; d=mg.codeaurora.org; q=dns/txt; s=smtp; t=1600480982; h=References: In-Reply-To: Message-Id: Date: Subject: Cc: To: From: Sender; bh=ntU9ESFtCMTZuTbwP8UstmSzL85B3vm8HNNo34Ro4RM=; b=nxlG7hBFt9imNaEIHeAR5whOTKo17Vd5WggiFdBOsHzyV9etzlyQ08E2G27Xjfl/e/r32+20 6WqVK73Ulxk2wWPF0pZta1iFWtljIUMKfEEZviwUWRE9pJyDkfHXDA7J4kj8t913R3mfdMWn ONVtrxHohmjguc41R/QfoHXUzbY= X-Mailgun-Sending-Ip: 198.61.254.54 X-Mailgun-Sid: WyI1MzIzYiIsICJsaW51eC1hcm0tbXNtQHZnZXIua2VybmVsLm9yZyIsICJiZTllNGEiXQ== Received: from smtp.codeaurora.org (ec2-35-166-182-171.us-west-2.compute.amazonaws.com [35.166.182.171]) by smtp-out-n02.prod.us-west-2.postgun.com with SMTP id 5f6566c52131f7663aca9fad (version=TLS1.2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256); Sat, 19 Sep 2020 02:02:45 GMT Sender: bbhatt=codeaurora.org@mg.codeaurora.org Received: by smtp.codeaurora.org (Postfix, from userid 1001) id 3FA57C433C8; Sat, 19 Sep 2020 02:02:45 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-caf-mail-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.9 required=2.0 tests=ALL_TRUSTED,BAYES_00,SPF_FAIL, URIBL_BLOCKED autolearn=no autolearn_force=no version=3.4.0 Received: from malabar-linux.qualcomm.com (i-global254.qualcomm.com [199.106.103.254]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: bbhatt) by smtp.codeaurora.org (Postfix) with ESMTPSA id 3F65BC433CB; Sat, 19 Sep 2020 02:02:44 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org 3F65BC433CB Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; spf=fail smtp.mailfrom=bbhatt@codeaurora.org From: Bhaumik Bhatt To: manivannan.sadhasivam@linaro.org Cc: linux-arm-msm@vger.kernel.org, hemantk@codeaurora.org, jhugo@codeaurora.org, linux-kernel@vger.kernel.org, Bhaumik Bhatt Subject: [PATCH v1 02/10] bus: mhi: core: Move to using high priority workqueue Date: Fri, 18 Sep 2020 19:02:27 -0700 Message-Id: <1600480955-16827-3-git-send-email-bbhatt@codeaurora.org> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1600480955-16827-1-git-send-email-bbhatt@codeaurora.org> References: <1600480955-16827-1-git-send-email-bbhatt@codeaurora.org> Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org MHI work is currently scheduled on the global/system workqueue and can encounter delays on a stressed system. To avoid those unforeseen delays which can hamper bootup or shutdown times, use a dedicated high priority workqueue instead of the global/system workqueue. Signed-off-by: Bhaumik Bhatt --- drivers/bus/mhi/core/init.c | 7 +++++++ drivers/bus/mhi/core/pm.c | 2 +- include/linux/mhi.h | 2 ++ 3 files changed, 10 insertions(+), 1 deletion(-) diff --git a/drivers/bus/mhi/core/init.c b/drivers/bus/mhi/core/init.c index 1b4161e..ca32563 100644 --- a/drivers/bus/mhi/core/init.c +++ b/drivers/bus/mhi/core/init.c @@ -890,6 +890,11 @@ int mhi_register_controller(struct mhi_controller *mhi_cntrl, INIT_WORK(&mhi_cntrl->st_worker, mhi_pm_st_worker); init_waitqueue_head(&mhi_cntrl->state_event); + mhi_cntrl->hiprio_wq = alloc_ordered_workqueue + ("mhi_hiprio_wq", WQ_MEM_RECLAIM | WQ_HIGHPRI); + if (!mhi_cntrl->hiprio_wq) + goto error_alloc_cmd; + mhi_cmd = mhi_cntrl->mhi_cmd; for (i = 0; i < NR_OF_CMD_RINGS; i++, mhi_cmd++) spin_lock_init(&mhi_cmd->lock); @@ -977,10 +982,12 @@ int mhi_register_controller(struct mhi_controller *mhi_cntrl, error_alloc_dev: kfree(mhi_cntrl->mhi_cmd); + destroy_workqueue(mhi_cntrl->hiprio_wq); error_alloc_cmd: vfree(mhi_cntrl->mhi_chan); kfree(mhi_cntrl->mhi_event); + destroy_workqueue(mhi_cntrl->hiprio_wq); return ret; } diff --git a/drivers/bus/mhi/core/pm.c b/drivers/bus/mhi/core/pm.c index ce4d969..9d4789d 100644 --- a/drivers/bus/mhi/core/pm.c +++ b/drivers/bus/mhi/core/pm.c @@ -597,7 +597,7 @@ int mhi_queue_state_transition(struct mhi_controller *mhi_cntrl, list_add_tail(&item->node, &mhi_cntrl->transition_list); spin_unlock_irqrestore(&mhi_cntrl->transition_lock, flags); - schedule_work(&mhi_cntrl->st_worker); + queue_work(mhi_cntrl->hiprio_wq, &mhi_cntrl->st_worker); return 0; } diff --git a/include/linux/mhi.h b/include/linux/mhi.h index fb45a0f..7677676 100644 --- a/include/linux/mhi.h +++ b/include/linux/mhi.h @@ -338,6 +338,7 @@ struct mhi_controller_config { * @wlock: Lock for protecting device wakeup * @mhi_link_info: Device bandwidth info * @st_worker: State transition worker + * @hiprio_wq: High priority workqueue * @state_event: State change event * @status_cb: CB function to notify power states of the device (required) * @wake_get: CB function to assert device wake (optional) @@ -421,6 +422,7 @@ struct mhi_controller { spinlock_t wlock; struct mhi_link_info mhi_link_info; struct work_struct st_worker; + struct workqueue_struct *hiprio_wq; wait_queue_head_t state_event; void (*status_cb)(struct mhi_controller *mhi_cntrl,