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

[Sibi Sankar]

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 <si...@codeaurora.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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