From mboxrd@z Thu Jan 1 00:00:00 1970 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=-9.9 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham 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 D1976C2BAEE for ; Tue, 24 Mar 2020 05:29:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id A895420663 for ; Tue, 24 Mar 2020 05:29:15 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=linaro.org header.i=@linaro.org header.b="hEM/rlGO" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726034AbgCXF3O (ORCPT ); Tue, 24 Mar 2020 01:29:14 -0400 Received: from mail-pf1-f194.google.com ([209.85.210.194]:37027 "EHLO mail-pf1-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727107AbgCXF3N (ORCPT ); Tue, 24 Mar 2020 01:29:13 -0400 Received: by mail-pf1-f194.google.com with SMTP id h72so6516955pfe.4 for ; Mon, 23 Mar 2020 22:29:13 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=prgc5yenFbqVYl3a5KSc8kSrf0HkGH2FfV3zRCvqmKU=; b=hEM/rlGONfHazJadGQTiOmWEjAXm+vqSTfam1wcplNH/Q+O2ztDaFBFhwMOXpkHSfD uuYUDr2Kd4VIN3SYFxZa2n/0SfPhX4KVBJ+zsS9ydwuzklU5ahb6KHiH9whRc/hDkOlu UAk/4bXjXKiKat4+ig6OgvxgoOgjI+S1WSwW5do5L8dDH2+XMbOvo+DodnHyUGgMHgOD KNPwc0fUdvDZG3yEUWniIG/YNqBiKOT5fIefa0zVBZLgLpDLvTe3/w2B0h/qCPCCcDdx 1pU0J5yqCCONt/pov1CbLsk2VtWgOAbg4M1sBE8G3pYh17w9zom/Cn0d9ZMV3MtyTggK uU4A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=prgc5yenFbqVYl3a5KSc8kSrf0HkGH2FfV3zRCvqmKU=; b=X7rd56sPWij5dqTnop8l5SeyWv2dzYfOHFAEf5OtgFdHUpHE8SNKmEi0NbOqcnnNpx tT5TohlpHEwDPmwprxLQ3ji9qrl7P12Rtck5gjzEt1rwpzjJ6WP6RIWsg3RKUxHAvQiJ auNHvuKrVe9NraFp685wUBOhmTB2/DXCkruUDoSDIemjQ8Vsx19WOk2tE+MaTPYMrvwY TbqObhIKZWp4m805KNUwTojYSErLbH+Xe8KXiMnLMre6VsyWQi8SM7g4FqzHKkzFQP4l 59cYpYUn1EUMf2XS1FKV0eaGXXKcxX82GsE+CUZM0kR3j+KwJ+JBNOrnCGNtt9cFXE1L vlLA== X-Gm-Message-State: ANhLgQ2XZMPyGBFA9YA8MZSo6II5JlrAG47CpllK38aVNGzLlccX2ada OjKieNO3JKn/M24BJ1YClJKZ+zf5Y9o= X-Google-Smtp-Source: ADFU+vtgBsqLCxc1WIyurKzcIGq00eupxNzzBQUA9Hm7fC7RVe5GrYL7SrWGnfmVf04T87Ro1s1FLg== X-Received: by 2002:a63:fd0d:: with SMTP id d13mr22612146pgh.302.1585027752740; Mon, 23 Mar 2020 22:29:12 -0700 (PDT) Received: from localhost.localdomain (104-188-17-28.lightspeed.sndgca.sbcglobal.net. [104.188.17.28]) by smtp.gmail.com with ESMTPSA id j14sm2795413pgk.74.2020.03.23.22.29.11 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 23 Mar 2020 22:29:12 -0700 (PDT) From: Bjorn Andersson To: Andy Gross , Bjorn Andersson , Ohad Ben-Cohen Cc: linux-arm-msm@vger.kernel.org, linux-remoteproc@vger.kernel.org, linux-kernel@vger.kernel.org, Mathieu Poirier Subject: [PATCH v5 3/4] remoteproc: qcom: q6v5: Add common panic handler Date: Mon, 23 Mar 2020 22:29:03 -0700 Message-Id: <20200324052904.738594-4-bjorn.andersson@linaro.org> X-Mailer: git-send-email 2.24.0 In-Reply-To: <20200324052904.738594-1-bjorn.andersson@linaro.org> References: <20200324052904.738594-1-bjorn.andersson@linaro.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-arm-msm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org Add a common panic handler that invokes a stop request and sleep enough to let the remoteproc flush it's caches etc in order to aid post mortem debugging. For now a hard coded 200ms is returned to the remoteproc core, this value is taken from the downstream kernel. Reviewed-by: Mathieu Poirier Signed-off-by: Bjorn Andersson --- Changes since v4: - Picked up Mathieu's r-b drivers/remoteproc/qcom_q6v5.c | 20 ++++++++++++++++++++ drivers/remoteproc/qcom_q6v5.h | 1 + 2 files changed, 21 insertions(+) diff --git a/drivers/remoteproc/qcom_q6v5.c b/drivers/remoteproc/qcom_q6v5.c index cb0f4a0be032..111a442c993c 100644 --- a/drivers/remoteproc/qcom_q6v5.c +++ b/drivers/remoteproc/qcom_q6v5.c @@ -15,6 +15,8 @@ #include #include "qcom_q6v5.h" +#define Q6V5_PANIC_DELAY_MS 200 + /** * qcom_q6v5_prepare() - reinitialize the qcom_q6v5 context before start * @q6v5: reference to qcom_q6v5 context to be reinitialized @@ -162,6 +164,24 @@ int qcom_q6v5_request_stop(struct qcom_q6v5 *q6v5) } EXPORT_SYMBOL_GPL(qcom_q6v5_request_stop); +/** + * qcom_q6v5_panic() - panic handler to invoke a stop on the remote + * @q6v5: reference to qcom_q6v5 context + * + * Set the stop bit and sleep in order to allow the remote processor to flush + * its caches etc for post mortem debugging. + * + * Return: 200ms + */ +unsigned long qcom_q6v5_panic(struct qcom_q6v5 *q6v5) +{ + qcom_smem_state_update_bits(q6v5->state, + BIT(q6v5->stop_bit), BIT(q6v5->stop_bit)); + + return Q6V5_PANIC_DELAY_MS; +} +EXPORT_SYMBOL_GPL(qcom_q6v5_panic); + /** * qcom_q6v5_init() - initializer of the q6v5 common struct * @q6v5: handle to be initialized diff --git a/drivers/remoteproc/qcom_q6v5.h b/drivers/remoteproc/qcom_q6v5.h index 7ac92c1e0f49..c4ed887c1499 100644 --- a/drivers/remoteproc/qcom_q6v5.h +++ b/drivers/remoteproc/qcom_q6v5.h @@ -42,5 +42,6 @@ int qcom_q6v5_prepare(struct qcom_q6v5 *q6v5); int qcom_q6v5_unprepare(struct qcom_q6v5 *q6v5); int qcom_q6v5_request_stop(struct qcom_q6v5 *q6v5); int qcom_q6v5_wait_for_start(struct qcom_q6v5 *q6v5, int timeout); +unsigned long qcom_q6v5_panic(struct qcom_q6v5 *q6v5); #endif -- 2.24.0