[PATCH v11 4/7] remoteproc: Introduce release_fw optional operation

Arnaud Pouliquen
2024-10-09T08:03:54Z

This patch updates the rproc_ops struct to include an optional
release_fw function.

The release_fw ops is responsible for releasing the remote processor
firmware image. The ops is called in the following cases:

- An error occurs in rproc_start() between the loading of the segments and
the start of the remote processor.
- after stopping the remote processor.

Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@foss.st.com>
---
Update vs v9 revision:
- New commit that preplace previous one to introduce ops->release_fw
---
drivers/remoteproc/remoteproc_core.c | 5 +++++
include/linux/remoteproc.h | 3 +++
2 files changed, 8 insertions(+)

diff --git a/drivers/remoteproc/remoteproc_core.c b/drivers/remoteproc/remoteproc_core.c
index 7694817f25d4..46863e1ca307 100644
--- a/drivers/remoteproc/remoteproc_core.c
+++ b/drivers/remoteproc/remoteproc_core.c
@@ -1258,6 +1258,9 @@ static int rproc_alloc_registered_carveouts(struct rproc *rproc)

static void rproc_release_fw(struct rproc *rproc)
{
+ if (rproc->ops->release_fw)
+ rproc->ops->release_fw(rproc);
+
/* Free the copy of the resource table */
kfree(rproc->cached_table);
rproc->cached_table = NULL;
@@ -1377,6 +1380,8 @@ static int rproc_start(struct rproc *rproc, const struct firmware *fw)
unprepare_subdevices:
rproc_unprepare_subdevices(rproc);
reset_table_ptr:
+ if (rproc->ops->release_fw)
+ rproc->ops->release_fw(rproc);
rproc->table_ptr = rproc->cached_table;

return ret;
diff --git a/include/linux/remoteproc.h b/include/linux/remoteproc.h
index 73f640dd0fc0..bdf4d94a9e63 100644
--- a/include/linux/remoteproc.h
+++ b/include/linux/remoteproc.h
@@ -381,6 +381,8 @@ enum rsc_handling_status {
* @panic: optional callback to react to system panic, core will delay
* panic at least the returned number of milliseconds
* @coredump: collect firmware dump after the subsystem is shutdown
+ * @release_fw: optional function to release the firmware image from ROM memories.
+ * This function is called after stopping the process or in case of an error
*/
struct rproc_ops {
int (*prepare)(struct rproc *rproc);
@@ -403,6 +405,7 @@ struct rproc_ops {
u64 (*get_boot_addr)(struct rproc *rproc, const struct firmware *fw);
unsigned long (*panic)(struct rproc *rproc);
void (*coredump)(struct rproc *rproc);
+ void (*release_fw)(struct rproc *rproc);
};

/**
--
2.25.1