Commit e9142f5c authored by Bjorn Andersson's avatar Bjorn Andersson
Browse files

remoteproc: qcom: q6v5: Add common panic handler 



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: default avatarMathieu Poirier <mathieu.poirier@linaro.org>
Link: https://lore.kernel.org/r/20200324052904.738594-4-bjorn.andersson@linaro.org


Signed-off-by: default avatarBjorn Andersson <bjorn.andersson@linaro.org>
parent dc5192c4

drivers/remoteproc/qcom_q6v5.c

+20 −0
Original line number Diff line number Diff line
@@ -15,6 +15,8 @@ 
#include <linux/remoteproc.h>

#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

drivers/remoteproc/qcom_q6v5.h

+1 −0
Original line number Diff line number Diff line
@@ -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

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