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| author | Bjorn Andersson <bjorn.andersson@linaro.org> | 2020-03-23 22:29:03 -0700 |
|---|---|---|
| committer | Bjorn Andersson <bjorn.andersson@linaro.org> | 2020-03-25 22:29:45 -0700 |
| commit | e9142f5c28e997ab45fac23bc27a3bc01725bb49 (patch) | |
| tree | 666689a2d8d1809b58f50e63e7db7f65ff03063c /drivers/remoteproc | |
| parent | dc5192c449368eed3385f4405670aa3ed21d6270 (diff) | |
| download | linux-stable-e9142f5c28e997ab45fac23bc27a3bc01725bb49.tar.gz linux-stable-e9142f5c28e997ab45fac23bc27a3bc01725bb49.tar.bz2 linux-stable-e9142f5c28e997ab45fac23bc27a3bc01725bb49.zip | |
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: Mathieu Poirier <mathieu.poirier@linaro.org>
Link: https://lore.kernel.org/r/20200324052904.738594-4-bjorn.andersson@linaro.org
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Diffstat (limited to 'drivers/remoteproc')
| -rw-r--r-- | drivers/remoteproc/qcom_q6v5.c | 20 | ||||
| -rw-r--r-- | drivers/remoteproc/qcom_q6v5.h | 1 |
2 files changed, 21 insertions, 0 deletions
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 <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 @@ -163,6 +165,24 @@ 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 * @pdev: platform_device reference for acquiring resources 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 |