linux-kernel - [PATCH v3 4/6] remoteproc: qcom: q6v5-pil: Add custom dump function for modem

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Message-Id: <20180727152003.11663-5-sibis@codeaurora.org>
Date:   Fri, 27 Jul 2018 20:50:01 +0530
From:   Sibi Sankar <sibis@...eaurora.org>
To:     bjorn.andersson@...aro.org
Cc:     linux-remoteproc@...r.kernel.org, linux-kernel@...r.kernel.org,
        ohad@...ery.com, kyan@...eaurora.org, sricharan@...eaurora.org,
        akdwived@...eaurora.org, linux-arm-msm@...r.kernel.org,
        tsoni@...eaurora.org, Sibi Sankar <sibis@...eaurora.org>
Subject: [PATCH v3 4/6] remoteproc: qcom: q6v5-pil: Add custom dump function for modem

The per segment dump function is responsible for loading the mba
before device memory segments associated with coredump can be populated
and for cleaning up the resources post coredump.

Signed-off-by: Sibi Sankar <sibis@...eaurora.org>
---
 drivers/remoteproc/qcom_q6v5_pil.c | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/drivers/remoteproc/qcom_q6v5_pil.c b/drivers/remoteproc/qcom_q6v5_pil.c
index eacf9f0bf49e..ac3342f9ea5a 100644
--- a/drivers/remoteproc/qcom_q6v5_pil.c
+++ b/drivers/remoteproc/qcom_q6v5_pil.c
@@ -182,6 +182,7 @@ struct q6v5 {
 	struct qcom_sysmon *sysmon;
 	bool need_mem_protection;
 	bool has_alt_reset;
+	u32 valid_mask;
 	int mpss_perm;
 	int mba_perm;
 	int version;
@@ -924,6 +925,30 @@ static int q6v5_mpss_load(struct q6v5 *qproc)
 	return ret < 0 ? ret : 0;
 }
 
+static void qcom_q6v5_dump_segment(struct rproc *rproc, void *ptr, size_t len,
+								   void *priv)
+{
+	int ret = 0;
+	struct q6v5 *qproc = (struct q6v5 *)rproc->priv;
+	static u32 pending_mask;
+
+	/* Unlock mba before copying segments */
+	if (!qproc->mba_loaded)
+		ret = q6v5_mba_load(qproc);
+
+	if (!ptr || ret)
+		memset(priv, 0xff, len);
+	else
+		memcpy(priv, ptr, len);
+
+	pending_mask++;
+	if (pending_mask == qproc->valid_mask) {
+		if (qproc->mba_loaded)
+			q6v5_mba_reclaim(qproc);
+		pending_mask = 0;
+	}
+}
+
 static int q6v5_start(struct rproc *rproc)
 {
 	struct q6v5 *qproc = (struct q6v5 *)rproc->priv;
-- 
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