Introduce function rproc_set_mcu_sync_state() to set the synchronisation
state of the MCU at various stages of the lifecycle process.
Signed-off-by: Mathieu Poirier <mathieu.poirier@xxxxxxxxxx>
---
drivers/remoteproc/remoteproc_internal.h | 38 ++++++++++++++++++++++++
1 file changed, 38 insertions(+)
diff --git a/drivers/remoteproc/remoteproc_internal.h b/drivers/remoteproc/remoteproc_internal.h
index 5c93de5e00bb..73ea32df0156 100644
--- a/drivers/remoteproc/remoteproc_internal.h
+++ b/drivers/remoteproc/remoteproc_internal.h
@@ -24,6 +24,26 @@ struct rproc_debug_trace {
struct rproc_mem_entry trace_mem;
};
+/*
+ * enum rproc_sync_states - remote processsor sync states
+ * @RPROC_SYNC_STATE_INIT state to use when the remoteproc core
+ * is initialising.
+ * @RPROC_SYNC_STATE_SHUTDOWN state to use after the remoteproc core
+ * has shutdown (rproc_shutdown()) the MCU.
+ * @RPROC_SYNC_STATE_CRASHED state to use after the MCU has crashed but
+ * has not been recovered by the remoteproc
+ * core yet.
+ *
+ * Keeping these separate from the enum rproc_state in order to avoid
+ * introducing coupling between the state of the MCU and the synchronisation
+ * operation to use.
+ */
+enum rproc_mcu_sync_states {
+ RPROC_SYNC_STATE_INIT,
+ RPROC_SYNC_STATE_SHUTDOWN,
+ RPROC_SYNC_STATE_CRASHED,
+};
+
/* from remoteproc_core.c */
void rproc_release(struct kref *kref);
irqreturn_t rproc_vq_interrupt(struct rproc *rproc, int vq_id);
@@ -68,6 +88,24 @@ static inline bool rproc_sync_with_mcu(struct rproc *rproc)
return rproc->sync_with_mcu;
}
+static inline void rproc_set_mcu_sync_state(struct rproc *rproc,
+ unsigned int state)
+{
+ switch (state) {
+ case RPROC_SYNC_STATE_INIT:
+ rproc->sync_with_mcu = rproc->sync_states->on_init;
+ break;
+ case RPROC_SYNC_STATE_SHUTDOWN:
+ rproc->sync_with_mcu = rproc->sync_states->after_stop;
+ break;
+ case RPROC_SYNC_STATE_CRASHED:
+ rproc->sync_with_mcu = rproc->sync_states->after_crash;
+ break;
+ default:
+ break;
+ }
+}
+
static inline
int rproc_fw_sanity_check(struct rproc *rproc, const struct firmware *fw)
{
--
2.20.1
