[PATCH v3 03/14] remoteproc: Add new operation and flags for synchronistation

Mathieu Poirier
2020-04-24T20:01:46Z

Add a new sync_ops to support use cases where the remoteproc
core is synchronising with the remote processor. Exactly when to use
the synchronisation operations is directed by the flags in structure
rproc_sync_flags.

Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
---
include/linux/remoteproc.h | 24 ++++++++++++++++++++++++
1 file changed, 24 insertions(+)

diff --git a/include/linux/remoteproc.h b/include/linux/remoteproc.h
index ac4082f12e8b..ceb3b2bba824 100644
--- a/include/linux/remoteproc.h
+++ b/include/linux/remoteproc.h
@@ -353,6 +353,23 @@ enum rsc_handling_status {
RSC_IGNORED = 1,
};

+/**
+ * struct rproc_sync_flags - platform specific flags indicating which
+ * rproc_ops to use at specific times during
+ * the rproc lifecycle.
+ * @on_init: true if synchronising with the remote processor at
+ * initialisation time
+ * @after_stop: true if synchronising with the remote processor after it was
+ * stopped from the cmmand line
+ * @after_crash: true if synchronising with the remote processor after
+ * it has crashed
+ */
+struct rproc_sync_flags {
+ bool on_init;
+ bool after_stop;
+ bool after_crash;
+};
+
/**
* struct rproc_ops - platform-specific device handlers
* @start: power on the device and boot it
@@ -459,6 +476,9 @@ struct rproc_dump_segment {
* @firmware: name of firmware file to be loaded
* @priv: private data which belongs to the platform-specific rproc module
* @ops: platform-specific start/stop rproc handlers
+ * @sync_ops: platform-specific start/stop rproc handlers when
+ * synchronising with a remote processor.
+ * @sync_flags: Determine the rproc_ops to choose in specific states.
* @dev: virtual device for refcounting and common remoteproc behavior
* @power: refcount of users who need this rproc powered up
* @state: state of the device
@@ -482,6 +502,7 @@ struct rproc_dump_segment {
* @table_sz: size of @cached_table
* @has_iommu: flag to indicate if remote processor is behind an MMU
* @auto_boot: flag to indicate if remote processor should be auto-started
+ * @sync_with_rproc: true if currently synchronising with the rproc
* @dump_segments: list of segments in the firmware
* @nb_vdev: number of vdev currently handled by rproc
*/
@@ -492,6 +513,8 @@ struct rproc {
const char *firmware;
void *priv;
struct rproc_ops *ops;
+ struct rproc_ops *sync_ops;
+ struct rproc_sync_flags sync_flags;
struct device dev;
atomic_t power;
unsigned int state;
@@ -515,6 +538,7 @@ struct rproc {
size_t table_sz;
bool has_iommu;
bool auto_boot;
+ bool sync_with_rproc;
struct list_head dump_segments;
int nb_vdev;
u8 elf_class;
--
2.20.1