[PATCH v3 1/6] remoteproc: Introduce custom dump function for each remoteproc segment

[Sibi Sankar]

Introduce custom dump function per remoteproc segment. It is responsible
for filling the device memory segment associated with coredump

Signed-off-by: Sibi Sankar <si...@codeaurora.org>
---
 drivers/remoteproc/remoteproc_core.c | 15 ++++++++++-----
 include/linux/remoteproc.h           |  3 +++
 2 files changed, 13 insertions(+), 5 deletions(-)

diff --git a/drivers/remoteproc/remoteproc_core.c 
b/drivers/remoteproc/remoteproc_core.c
index 283b258f5e0f..ec56cd822b26 100644
--- a/drivers/remoteproc/remoteproc_core.c
+++ b/drivers/remoteproc/remoteproc_core.c
@@ -1183,13 +1183,18 @@ static void rproc_coredump(struct rproc *rproc)
                phdr->p_align = 0;
 
                ptr = rproc_da_to_va(rproc, segment->da, segment->size);
-               if (!ptr) {
-                       dev_err(&rproc->dev,
+
+               if (segment->dump) {
+                       segment->dump(rproc, ptr, segment->size, data + offset);
+               } else {
+                       if (!ptr) {
+                               dev_err(&rproc->dev,
                                "invalid coredump segment (%pad, %zu)\n",
                                &segment->da, segment->size);
-                       memset(data + offset, 0xff, segment->size);
-               } else {
-                       memcpy(data + offset, ptr, segment->size);
+                               memset(data + offset, 0xff, segment->size);
+                       } else {
+                               memcpy(data + offset, ptr, segment->size);
+                       }
                }
 
                offset += phdr->p_filesz;
diff --git a/include/linux/remoteproc.h b/include/linux/remoteproc.h
index e3c5d856b6da..0fbb01a9955c 100644
--- a/include/linux/remoteproc.h
+++ b/include/linux/remoteproc.h
@@ -399,6 +399,8 @@ enum rproc_crash_type {
  * @node:      list node related to the rproc segment list
  * @da:                device address of the segment
  * @size:      size of the segment
+ * @dump:      custom dump function to fill device memory segment associated
+ *             with coredump
  */
 struct rproc_dump_segment {
        struct list_head node;
@@ -406,6 +408,7 @@ struct rproc_dump_segment {
        dma_addr_t da;
        size_t size;
 
+       void (*dump)(struct rproc *rproc, void *ptr, size_t len, void *priv);
        loff_t offset;
 };
 
-- 
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