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[104.188.17.28]) by smtp.gmail.com with ESMTPSA id u7sm86070777pfm.96.2019.08.06.22.39.54 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 06 Aug 2019 22:39:54 -0700 (PDT) From: Bjorn Andersson To: Ohad Ben-Cohen , Bjorn Andersson Cc: Andy Gross , Sibi Sankar , linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-remoteproc@vger.kernel.org Subject: [PATCH 8/9] remoteproc: qcom: q6v5: Add common panic handler Date: Tue, 6 Aug 2019 22:39:41 -0700 Message-Id: <20190807053942.9836-9-bjorn.andersson@linaro.org> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20190807053942.9836-1-bjorn.andersson@linaro.org> References: <20190807053942.9836-1-bjorn.andersson@linaro.org> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@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. Signed-off-by: Bjorn Andersson --- drivers/remoteproc/qcom_q6v5.c | 19 +++++++++++++++++++ drivers/remoteproc/qcom_q6v5.h | 1 + 2 files changed, 20 insertions(+) diff --git a/drivers/remoteproc/qcom_q6v5.c b/drivers/remoteproc/qcom_q6v5.c index 0d33e3079f0d..0aebae893362 100644 --- a/drivers/remoteproc/qcom_q6v5.c +++ b/drivers/remoteproc/qcom_q6v5.c @@ -6,6 +6,7 @@ * Copyright (C) 2014 Sony Mobile Communications AB * Copyright (c) 2012-2013, The Linux Foundation. All rights reserved. */ +#include #include #include #include @@ -15,6 +16,8 @@ #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 +165,22 @@ 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. + */ +void qcom_q6v5_panic(struct qcom_q6v5 *q6v5) +{ + qcom_smem_state_update_bits(q6v5->state, + BIT(q6v5->stop_bit), BIT(q6v5->stop_bit)); + + mdelay(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..c37e6fd063e4 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); +void qcom_q6v5_panic(struct qcom_q6v5 *q6v5); #endif -- 2.18.0