[PATCH v14 5/8] remoteproc: Make load_segments and load_fw ops exclusive and optional

Arnaud Pouliquen
2024-11-26T09:13:28Z

The two methods to load the firmware to memory should be exclusive.

- make load_segments optional returning 0 if not set in
rproc_load_segments(),
- ensure that load_segments() and load_fw() are not both set,
- do not set default rproc::ops fields if load_fw() is set.

Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@foss.st.com>
---
drivers/remoteproc/remoteproc_core.c | 4 ++++
drivers/remoteproc/remoteproc_internal.h | 2 +-
include/linux/remoteproc.h | 7 +++++--
3 files changed, 10 insertions(+), 3 deletions(-)

diff --git a/drivers/remoteproc/remoteproc_core.c b/drivers/remoteproc/remoteproc_core.c
index e4ad024efcda..deadec0f3474 100644
--- a/drivers/remoteproc/remoteproc_core.c
+++ b/drivers/remoteproc/remoteproc_core.c
@@ -2477,6 +2477,10 @@ static int rproc_alloc_firmware(struct rproc *rproc,

static int rproc_alloc_ops(struct rproc *rproc, const struct rproc_ops *ops)
{
+ /* A processor with a load_segments() and a load_fw() functions makes no sense. */
+ if (ops->load_segments && ops->load_fw)
+ return -EINVAL;
+
rproc->ops = kmemdup(ops, sizeof(*ops), GFP_KERNEL);
if (!rproc->ops)
return -ENOMEM;
diff --git a/drivers/remoteproc/remoteproc_internal.h b/drivers/remoteproc/remoteproc_internal.h
index b898494600cf..3a4161eaf291 100644
--- a/drivers/remoteproc/remoteproc_internal.h
+++ b/drivers/remoteproc/remoteproc_internal.h
@@ -170,7 +170,7 @@ int rproc_load_segments(struct rproc *rproc, const struct firmware *fw)
if (rproc->ops->load_segments)
return rproc->ops->load_segments(rproc, fw);

- return -EINVAL;
+ return 0;
}

static inline int rproc_parse_fw(struct rproc *rproc, const struct firmware *fw)
diff --git a/include/linux/remoteproc.h b/include/linux/remoteproc.h
index 55c20424a99f..4f4c65ce74af 100644
--- a/include/linux/remoteproc.h
+++ b/include/linux/remoteproc.h
@@ -374,8 +374,9 @@ enum rsc_handling_status {
* @find_loaded_rsc_table: find the loaded resource table from firmware image
* @get_loaded_rsc_table: get resource table installed in memory
* by external entity
- * @load_segments: load firmware ELF segment to memory, where the remote processor
- * expects to find it
+ * @load_segments: optional load firmware ELF segments to memory, where the remote processor
+ * expects to find it.
+ * This operation is exclusive with the load_fw()
* @sanity_check: sanity check the fw image
* @get_boot_addr: get boot address to entry point specified in firmware
* @panic: optional callback to react to system panic, core will delay
@@ -383,8 +384,10 @@ enum rsc_handling_status {
* @coredump: collect firmware dump after the subsystem is shutdown
* @load_fw: optional function to load non-ELF firmware image to memory, where the remote
* processor expects to find it.
+ * This operation is exclusive with the load_segments()
* @release_fw: optional function to release the firmware image from memories.
* This function is called after stopping the remote processor or in case of error
+ *
*/
struct rproc_ops {
int (*prepare)(struct rproc *rproc);
--
2.25.1