remoteproc: Add mechanism for custom dump function assignment

This patch adds a mechanism for assigning each rproc dump segment with
a custom dump function and private data. The dump function is to be
called for each rproc segment during coredump if assigned.

Signed-off-by: Sibi Sankar <sibis@codeaurora.org>
[bjorn: reordred arguments to rproc_coredump_add_custom_segment()]
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>

1 files changed, 38 insertions, 0 deletions

diff --git a/drivers/remoteproc/remoteproc_core.c b/drivers/remoteproc/remoteproc_core.c
index 6bed40d01dbf..54ec38fc5dca 100644
--- a/drivers/remoteproc/remoteproc_core.c
+++ b/drivers/remoteproc/remoteproc_core.c
@@ -1447,6 +1447,44 @@ int rproc_coredump_add_segment(struct rproc *rproc, dma_addr_t da, size_t size)
 EXPORT_SYMBOL(rproc_coredump_add_segment);
 
 /**
+ * rproc_coredump_add_custom_segment() - add custom coredump segment
+ * @rproc:	handle of a remote processor
+ * @da:		device address
+ * @size:	size of segment
+ * @dumpfn:	custom dump function called for each segment during coredump
+ * @priv:	private data
+ *
+ * Add device memory to the list of segments to be included in the coredump
+ * and associate the segment with the given custom dump function and private
+ * data.
+ *
+ * Return: 0 on success, negative errno on error.
+ */
+int rproc_coredump_add_custom_segment(struct rproc *rproc,
+				      dma_addr_t da, size_t size,
+				      void (*dumpfn)(struct rproc *rproc,
+						     struct rproc_dump_segment *segment,
+						     void *dest),
+				      void *priv)
+{
+	struct rproc_dump_segment *segment;
+
+	segment = kzalloc(sizeof(*segment), GFP_KERNEL);
+	if (!segment)
+		return -ENOMEM;
+
+	segment->da = da;
+	segment->size = size;
+	segment->priv = priv;
+	segment->dump = dumpfn;
+
+	list_add_tail(&segment->node, &rproc->dump_segments);
+
+	return 0;
+}
+EXPORT_SYMBOL(rproc_coredump_add_custom_segment);
+
+/**
  * rproc_coredump() - perform coredump
  * @rproc:	rproc handle
  *