@@ -1488,6 +1488,7 @@ static int rproc_fw_boot(struct rproc *rproc, const struct firmware *fw)
kfree(rproc->cached_table);
rproc->cached_table = NULL;
rproc->table_ptr = NULL;
+ rproc_release_fw(rproc);
unprepare_rproc:
/* release HW resources if needed */
rproc_unprepare_device(rproc);
@@ -1855,8 +1856,14 @@ static int rproc_boot_recovery(struct rproc *rproc)
return ret;
}
+ ret = rproc_load_fw(rproc, firmware_p);
+ if (ret)
+ return ret;
+
/* boot the remote processor up again */
ret = rproc_start(rproc, firmware_p);
+ if (ret)
+ rproc_release_fw(rproc);
release_firmware(firmware_p);
@@ -1997,7 +2004,13 @@ int rproc_boot(struct rproc *rproc)
goto downref_rproc;
}
+ ret = rproc_load_fw(rproc, firmware_p);
+ if (ret)
+ goto downref_rproc;
+
ret = rproc_fw_boot(rproc, firmware_p);
+ if (ret)
+ rproc_release_fw(rproc);
release_firmware(firmware_p);
}
@@ -2071,6 +2084,7 @@ int rproc_shutdown(struct rproc *rproc)
kfree(rproc->cached_table);
rproc->cached_table = NULL;
rproc->table_ptr = NULL;
+ rproc_release_fw(rproc);
out:
mutex_unlock(&rproc->lock);
return ret;
@@ -2471,7 +2485,7 @@ static int rproc_alloc_ops(struct rproc *rproc, const struct rproc_ops *ops)
if (!rproc->ops->coredump)
rproc->ops->coredump = rproc_coredump;
- if (rproc->ops->load)
+ if (rproc->ops->load || rproc->ops->load_fw)
return 0;
/* Default to ELF loader if no load function is specified */
@@ -221,4 +221,18 @@ bool rproc_u64_fit_in_size_t(u64 val)
return (val <= (size_t) -1);
}
+static inline void rproc_release_fw(struct rproc *rproc)
+{
+ if (rproc->ops->release_fw)
+ rproc->ops->release_fw(rproc);
+}
+
+static inline int rproc_load_fw(struct rproc *rproc, const struct firmware *fw)
+{
+ if (rproc->ops->load_fw)
+ return rproc->ops->load_fw(rproc, fw);
+
+ return 0;
+}
+
#endif /* REMOTEPROC_INTERNAL_H */
@@ -381,6 +381,10 @@ 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
+ * @load_fw: optional function to load non-ELF firmware image to memory, where the remote
+ * processor expects to find it.
+ * @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);
@@ -403,6 +407,8 @@ 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);
+ int (*load_fw)(struct rproc *rproc, const struct firmware *fw);
+ void (*release_fw)(struct rproc *rproc);
};
/**
This patch updates the rproc_ops structures to include two new optional operations. - The load_fw() op is responsible for loading the remote processor non-ELF firmware image before starting the boot sequence. This ops will be used, for instance, to call OP-TEE to authenticate an load the firmware image before accessing to its resources (a.e the resource table) - The release_fw op is responsible for releasing the remote processor firmware image. For instance to clean memories. The ops is called in the following cases: - An error occurs between the loading of the firmware image and the start of the remote processor. - after stopping the remote processor. Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@foss.st.com> --- Update vs previous revision: - Rework the commit to introduce load_fw() op. - remove rproc_release_fw() call from rproc_start() as called in rproc_boot() and rproc_boot_recovery() in case of error. - create rproc_load_fw() and rproc_release_fw() internal functions. --- drivers/remoteproc/remoteproc_core.c | 16 +++++++++++++++- drivers/remoteproc/remoteproc_internal.h | 14 ++++++++++++++ include/linux/remoteproc.h | 6 ++++++ 3 files changed, 35 insertions(+), 1 deletion(-)