linux-kernel - [PATCH] remoteproc: qcom: Add fallback mechanism for full coredump collection

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Date:   Wed, 6 Apr 2022 23:57:42 +0530
From:   Yogesh Lal <quic_ylal@...cinc.com>
To:     <bjorn.andersson@...aro.org>, <quic_sibis@...cinc.com>
CC:     <linux-arm-msm@...r.kernel.org>,
        <linux-remoteproc@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        Yogesh Lal <quic_ylal@...cinc.com>
Subject: [PATCH] remoteproc: qcom: Add fallback mechanism for full coredump collection

In case remoteproc's firmware missing minidump support, during crash
scenario coredump does not collected. This change adds a fallback
mechanism for full coredump collection in the event of a crash.

Signed-off-by: Yogesh Lal <quic_ylal@...cinc.com>
---
 drivers/remoteproc/qcom_common.c   | 11 ++++++++---
 drivers/remoteproc/qcom_q6v5_pas.c |  1 +
 2 files changed, 9 insertions(+), 3 deletions(-)

diff --git a/drivers/remoteproc/qcom_common.c b/drivers/remoteproc/qcom_common.c
index 4b91e3c..68bd0bc 100644
--- a/drivers/remoteproc/qcom_common.c
+++ b/drivers/remoteproc/qcom_common.c
@@ -162,13 +162,18 @@ void qcom_minidump(struct rproc *rproc, unsigned int minidump_id)
 	 * is initialized in memory and encryption status is set.
 	 */
 	if (subsystem->regions_baseptr == 0 ||
-	    le32_to_cpu(subsystem->status) != 1 ||
-	    le32_to_cpu(subsystem->enabled) != MD_SS_ENABLED ||
-	    le32_to_cpu(subsystem->encryption_status) != MD_SS_ENCR_DONE) {
+		le32_to_cpu(subsystem->status) != 1 ||
+		le32_to_cpu(subsystem->enabled) != MD_SS_ENABLED) {
+			return rproc_coredump(rproc);
+		}
+
+	if (le32_to_cpu(subsystem->encryption_status) != MD_SS_ENCR_DONE) {
 		dev_err(&rproc->dev, "Minidump not ready, skipping\n");
 		return;
 	}
 
+	rproc_coredump_cleanup(rproc);
+
 	ret = qcom_add_minidump_segments(rproc, subsystem);
 	if (ret) {
 		dev_err(&rproc->dev, "Failed with error: %d while adding minidump entries\n", ret);
diff --git a/drivers/remoteproc/qcom_q6v5_pas.c b/drivers/remoteproc/qcom_q6v5_pas.c
index 1ae47cc..40bf747 100644
--- a/drivers/remoteproc/qcom_q6v5_pas.c
+++ b/drivers/remoteproc/qcom_q6v5_pas.c
@@ -293,6 +293,7 @@ static const struct rproc_ops adsp_minidump_ops = {
 	.start = adsp_start,
 	.stop = adsp_stop,
 	.da_to_va = adsp_da_to_va,
+	.parse_fw = qcom_register_dump_segments,
 	.load = adsp_load,
 	.panic = adsp_panic,
 	.coredump = adsp_minidump,
-- 
2.7.4