linux-kernel - [V4 1/2] remoteproc: qcom_q6v5

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Date:   Tue, 24 May 2022 18:15:34 +0530
From:   Sibi Sankar <quic_sibis@...cinc.com>
To:     <bjorn.andersson@...aro.org>
CC:     <agross@...nel.org>, <mathieu.poirier@...aro.org>,
        <linux-arm-msm@...r.kernel.org>,
        <linux-remoteproc@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        Sibi Sankar <quic_sibis@...cinc.com>
Subject: [V4 1/2] remoteproc: qcom_q6v5_mss: Update MBA log info

Update MBA text logs location/size in IMEM to aid tools extract
them after ramdump collection. The size of the MBA text logs is
pre-determined and limited to 4K.

Signed-off-by: Sibi Sankar <quic_sibis@...cinc.com>
---

We update the imem only for remoteprocs that support mba logging
otherwise the post mortem tools will show garbled data while
reading the first 4K region from MBA on unsupported SoCs.
(MBA logs are officially supported on SC7180/SC7280 SoCs only)

 drivers/remoteproc/qcom_q6v5_mss.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/remoteproc/qcom_q6v5_mss.c b/drivers/remoteproc/qcom_q6v5_mss.c
index 4b37e11fbb03..46ca841371c8 100644
--- a/drivers/remoteproc/qcom_q6v5_mss.c
+++ b/drivers/remoteproc/qcom_q6v5_mss.c
@@ -1128,6 +1128,9 @@ static int q6v5_mba_load(struct q6v5 *qproc)
 	if (ret)
 		goto reclaim_mba;
 
+	if (qproc->has_mba_logs)
+		qcom_pil_info_store("mba", qproc->mba_phys, MBA_LOG_SIZE);
+
 	ret = q6v5_rmb_mba_wait(qproc, 0, 5000);
 	if (ret == -ETIMEDOUT) {
 		dev_err(qproc->dev, "MBA boot timed out\n");
-- 
2.7.4