remoteproc: core: Add ops to enable custom coredump functionality

Each remoteproc might have different requirements for coredumps and might
want to choose the type of dumps it wants to collect. This change allows
remoteproc drivers to specify their own custom dump function to be executed
in place of rproc_coredump. If the coredump op is not specified by the
remoteproc driver it will be set to rproc_coredump by default.

Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Siddharth Gupta <sidgup@codeaurora.org>
Link: https://lore.kernel.org/r/1605819935-10726-2-git-send-email-sidgup@codeaurora.org
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>

diff --git a/drivers/remoteproc/remoteproc_core.c b/drivers/remoteproc/remoteproc_core.c
index 46c2937ebea9644ec6c8edc4a06d0067465f2bf5..2394eef383e351f1083f9ee3bac297249fff9035 100644 (file)
--- a/drivers/remoteproc/remoteproc_core.c
+++ b/drivers/remoteproc/remoteproc_core.c
@@ -1704,7 +1704,7 @@ int rproc_trigger_recovery(struct rproc *rproc)
                goto unlock_mutex;
 
        /* generate coredump */
-       rproc_coredump(rproc);
+       rproc->ops->coredump(rproc);
 
        /* load firmware */
        ret = request_firmware(&firmware_p, rproc->firmware, dev);
@@ -2189,6 +2189,10 @@ static int rproc_alloc_ops(struct rproc *rproc, const struct rproc_ops *ops)
        if (!rproc->ops)
                return -ENOMEM;
 
+       /* Default to rproc_coredump if no coredump function is specified */
+       if (!rproc->ops->coredump)
+               rproc->ops->coredump = rproc_coredump;
+
        if (rproc->ops->load)
                return 0;
 

diff --git a/include/linux/remoteproc.h b/include/linux/remoteproc.h
index e8ac041c64d9f260577387e9baed6ab44db4140a..121c55eff3d20f7ec77212749ff37bebcdb8e7e3 100644 (file)
--- a/include/linux/remoteproc.h
+++ b/include/linux/remoteproc.h
@@ -375,6 +375,7 @@ enum rsc_handling_status {
  * @get_boot_addr:     get boot address to entry point specified in firmware
  * @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
  */
 struct rproc_ops {
        int (*prepare)(struct rproc *rproc);
@@ -393,6 +394,7 @@ struct rproc_ops {
        int (*sanity_check)(struct rproc *rproc, const struct firmware *fw);
        u64 (*get_boot_addr)(struct rproc *rproc, const struct firmware *fw);
        unsigned long (*panic)(struct rproc *rproc);
+       void (*coredump)(struct rproc *rproc);
 };
 
 /**