From patchwork Thu May 28 03:34:43 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Rishabh Bhatnagar X-Patchwork-Id: 11574313 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 B32FE913 for ; Thu, 28 May 2020 03:35:14 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 932D620C56 for ; Thu, 28 May 2020 03:35:14 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=mg.codeaurora.org header.i=@mg.codeaurora.org header.b="jgCv1B8l" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726530AbgE1DfN (ORCPT ); Wed, 27 May 2020 23:35:13 -0400 Received: from mail27.static.mailgun.info ([104.130.122.27]:64021 "EHLO mail27.static.mailgun.info" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726793AbgE1DfN (ORCPT ); Wed, 27 May 2020 23:35:13 -0400 DKIM-Signature: a=rsa-sha256; v=1; c=relaxed/relaxed; d=mg.codeaurora.org; q=dns/txt; s=smtp; t=1590636912; h=References: In-Reply-To: Message-Id: Date: Subject: Cc: To: From: Sender; bh=/1x1zy/A8SDtBlEw9Z+6IaVtjY/aex4rjqibXdLZ1NU=; b=jgCv1B8lir6JUXCgb37yUXRTxZtPCr1VFYCz0lU2f9kvhqz0LUk4Fpt75Lk/guiWbfgCR7r/ L6+XiCB5aozt6JV+RDiJLoxPKFeXMjbWSM6HlHpK7ucnQhkfABHPzB/LsxTxeOvIdyGbE+cK G+A91NAGL6sPMjXLOwZ026bZ0Fs= X-Mailgun-Sending-Ip: 104.130.122.27 X-Mailgun-Sid: WyI4ZWZiZiIsICJsaW51eC1yZW1vdGVwcm9jQHZnZXIua2VybmVsLm9yZyIsICJiZTllNGEiXQ== Received: from smtp.codeaurora.org (ec2-35-166-182-171.us-west-2.compute.amazonaws.com [35.166.182.171]) by smtp-out-n03.prod.us-east-1.postgun.com with SMTP id 5ecf315c2738686126a7fdbe (version=TLS1.2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256); Thu, 28 May 2020 03:34:52 GMT Received: by smtp.codeaurora.org (Postfix, from userid 1001) id 29A13C433CA; Thu, 28 May 2020 03:34:52 +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=-1.0 required=2.0 tests=ALL_TRUSTED,SPF_NONE autolearn=unavailable autolearn_force=no version=3.4.0 Received: from rishabhb-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: rishabhb) by smtp.codeaurora.org (Postfix) with ESMTPSA id 5155CC433CB; Thu, 28 May 2020 03:34:51 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org 5155CC433CB 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=none smtp.mailfrom=rishabhb@codeaurora.org From: Rishabh Bhatnagar To: linux-remoteproc@vger.kernel.org, linux-kernel@vger.kernel.org Cc: bjorn.andersson@linaro.org, tsoni@codeaurora.org, psodagud@codeaurora.org, sidgup@codeaurora.org, Rishabh Bhatnagar Subject: [PATCH v4 2/2] remoteproc: qcom: Add notification types to SSR Date: Wed, 27 May 2020 20:34:43 -0700 Message-Id: <1590636883-30866-3-git-send-email-rishabhb@codeaurora.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1590636883-30866-1-git-send-email-rishabhb@codeaurora.org> References: <1590636883-30866-1-git-send-email-rishabhb@codeaurora.org> Sender: linux-remoteproc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-remoteproc@vger.kernel.org From: Siddharth Gupta The SSR subdevice only adds callback for the unprepare event. Add callbacks for unprepare, start and prepare events. The client driver for a particular remoteproc might be interested in knowing the status of the remoteproc while undergoing SSR, not just when the remoteproc has finished shutting down. Signed-off-by: Siddharth Gupta Signed-off-by: Rishabh Bhatnagar --- drivers/remoteproc/qcom_common.c | 46 +++++++++++++++++++++++++++++++++-- include/linux/remoteproc/qcom_rproc.h | 14 +++++++++++ 2 files changed, 58 insertions(+), 2 deletions(-) diff --git a/drivers/remoteproc/qcom_common.c b/drivers/remoteproc/qcom_common.c index 61ff2dd..5c5a1eb 100644 --- a/drivers/remoteproc/qcom_common.c +++ b/drivers/remoteproc/qcom_common.c @@ -228,7 +228,7 @@ struct qcom_ssr_subsystem *qcom_ssr_get_subsys(const char *name) * * This registers the @nb notifier block as part the notifier chain for a * remoteproc associated with @name. The notifier block's callback - * will be invoked when the particular remote processor is stopped. + * will be invoked when the particular remote processor is started/stopped. */ void *qcom_register_ssr_notifier(const char *name, struct notifier_block *nb) { @@ -258,6 +258,44 @@ int qcom_unregister_ssr_notifier(void *notify, struct notifier_block *nb) } EXPORT_SYMBOL_GPL(qcom_unregister_ssr_notifier); +static int ssr_notify_prepare(struct rproc_subdev *subdev) +{ + struct qcom_rproc_ssr *ssr = to_ssr_subdev(subdev); + struct qcom_ssr_notif_data data = { + .name = ssr->info->name, + .crashed = false, + }; + + srcu_notifier_call_chain(&ssr->info->notifier_list, + QCOM_SSR_BEFORE_POWERUP, &data); + return 0; +} + +static int ssr_notify_start(struct rproc_subdev *subdev) +{ + struct qcom_rproc_ssr *ssr = to_ssr_subdev(subdev); + struct qcom_ssr_notif_data data = { + .name = ssr->info->name, + .crashed = false, + }; + + srcu_notifier_call_chain(&ssr->info->notifier_list, + QCOM_SSR_AFTER_POWERUP, &data); + return 0; +} + +static void ssr_notify_stop(struct rproc_subdev *subdev, bool crashed) +{ + struct qcom_rproc_ssr *ssr = to_ssr_subdev(subdev); + struct qcom_ssr_notif_data data = { + .name = ssr->info->name, + .crashed = crashed, + }; + + srcu_notifier_call_chain(&ssr->info->notifier_list, + QCOM_SSR_BEFORE_SHUTDOWN, &data); +} + static void ssr_notify_unprepare(struct rproc_subdev *subdev) { struct qcom_rproc_ssr *ssr = to_ssr_subdev(subdev); @@ -266,7 +304,8 @@ static void ssr_notify_unprepare(struct rproc_subdev *subdev) .crashed = false, }; - srcu_notifier_call_chain(&ssr->info->notifier_list, 0, &data); + srcu_notifier_call_chain(&ssr->info->notifier_list, + QCOM_SSR_AFTER_SHUTDOWN, &data); } @@ -294,6 +333,9 @@ void qcom_add_ssr_subdev(struct rproc *rproc, struct qcom_rproc_ssr *ssr, mutex_unlock(&qcom_ssr_subsys_lock); ssr->info = info; + ssr->subdev.prepare = ssr_notify_prepare; + ssr->subdev.start = ssr_notify_start; + ssr->subdev.stop = ssr_notify_stop; ssr->subdev.unprepare = ssr_notify_unprepare; rproc_add_subdev(rproc, &ssr->subdev); diff --git a/include/linux/remoteproc/qcom_rproc.h b/include/linux/remoteproc/qcom_rproc.h index 58422b1..a558183 100644 --- a/include/linux/remoteproc/qcom_rproc.h +++ b/include/linux/remoteproc/qcom_rproc.h @@ -5,6 +5,20 @@ #if IS_ENABLED(CONFIG_QCOM_RPROC_COMMON) +/** + * enum qcom_ssr_notif_type - Different stages of remoteproc notifications + * @QCOM_SSR_BEFORE_SHUTDOWN: unprepare stage of remoteproc + * @QCOM_SSR_AFTER_SHUTDOWN: stop stage of remoteproc + * @QCOM_SSR_BEFORE_POWERUP: prepare stage of remoteproc + * @QCOM_SSR_AFTER_POWERUP: start stage of remoteproc + */ +enum qcom_ssr_notif_type { + QCOM_SSR_BEFORE_SHUTDOWN, + QCOM_SSR_AFTER_SHUTDOWN, + QCOM_SSR_BEFORE_POWERUP, + QCOM_SSR_AFTER_POWERUP, +}; + struct qcom_ssr_notif_data { const char *name; bool crashed;