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Message-Id: <20200716123630.21892-3-sibis@codeaurora.org>
Date: Thu, 16 Jul 2020 18:06:29 +0530
From: Sibi Sankar <sibis@...eaurora.org>
To: bjorn.andersson@...aro.org
Cc: agross@...nel.org, linux-arm-msm@...r.kernel.org,
linux-remoteproc@...r.kernel.org, linux-kernel@...r.kernel.org,
evgreen@...omium.org, ohad@...ery.com,
Sibi Sankar <sibis@...eaurora.org>
Subject: [PATCH 2/3] remoteproc: qcom_q6v5_mss: Add MBA log extraction support
On SC7180 the MBA firmware stores the bootup text logs in a 4K segment
at the beginning of the MBA region. Add support to extract the logs
which will be useful to debug mba boot/authentication issues.
Signed-off-by: Sibi Sankar <sibis@...eaurora.org>
---
drivers/remoteproc/qcom_q6v5_mss.c | 41 ++++++++++++++++++++++++++----
1 file changed, 36 insertions(+), 5 deletions(-)
diff --git a/drivers/remoteproc/qcom_q6v5_mss.c b/drivers/remoteproc/qcom_q6v5_mss.c
index 95e21ed607cb9..4ddf084b2c6fc 100644
--- a/drivers/remoteproc/qcom_q6v5_mss.c
+++ b/drivers/remoteproc/qcom_q6v5_mss.c
@@ -9,6 +9,7 @@
#include <linux/clk.h>
#include <linux/delay.h>
+#include <linux/devcoredump.h>
#include <linux/dma-mapping.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
@@ -37,6 +38,8 @@
#define MPSS_CRASH_REASON_SMEM 421
+#define MBA_LOG_SIZE SZ_4K
+
/* RMB Status Register Values */
#define RMB_PBL_SUCCESS 0x1
@@ -139,6 +142,7 @@ struct rproc_hexagon_res {
int version;
bool need_mem_protection;
bool has_alt_reset;
+ bool has_mba_logs;
bool has_spare_reg;
};
@@ -200,6 +204,7 @@ struct q6v5 {
struct qcom_sysmon *sysmon;
bool need_mem_protection;
bool has_alt_reset;
+ bool has_mba_logs;
bool has_spare_reg;
int mpss_perm;
int mba_perm;
@@ -518,6 +523,19 @@ static int q6v5_rmb_mba_wait(struct q6v5 *qproc, u32 status, int ms)
return val;
}
+static void q6v5_dump_mba_logs(struct q6v5 *qproc)
+{
+ struct rproc *rproc = qproc->rproc;
+ void *data;
+
+ data = vmalloc(MBA_LOG_SIZE);
+ if (!data)
+ return;
+
+ memcpy(data, qproc->mba_region, MBA_LOG_SIZE);
+ dev_coredumpv(&rproc->dev, data, MBA_LOG_SIZE, GFP_KERNEL);
+}
+
static int q6v5proc_reset(struct q6v5 *qproc)
{
u32 val;
@@ -838,6 +856,7 @@ static int q6v5_mba_load(struct q6v5 *qproc)
{
int ret;
int xfermemop_ret;
+ bool mba_load_err = false;
qcom_q6v5_prepare(&qproc->q6v5);
@@ -931,7 +950,7 @@ static int q6v5_mba_load(struct q6v5 *qproc)
q6v5proc_halt_axi_port(qproc, qproc->halt_map, qproc->halt_q6);
q6v5proc_halt_axi_port(qproc, qproc->halt_map, qproc->halt_modem);
q6v5proc_halt_axi_port(qproc, qproc->halt_map, qproc->halt_nc);
-
+ mba_load_err = true;
reclaim_mba:
xfermemop_ret = q6v5_xfer_mem_ownership(qproc, &qproc->mba_perm, true,
false, qproc->mba_phys,
@@ -939,6 +958,8 @@ static int q6v5_mba_load(struct q6v5 *qproc)
if (xfermemop_ret) {
dev_err(qproc->dev,
"Failed to reclaim mba buffer, system may become unstable\n");
+ } else if (qproc->has_mba_logs & mba_load_err) {
+ q6v5_dump_mba_logs(qproc);
}
disable_active_clks:
@@ -968,7 +989,7 @@ static int q6v5_mba_load(struct q6v5 *qproc)
return ret;
}
-static void q6v5_mba_reclaim(struct q6v5 *qproc)
+static void q6v5_mba_reclaim(struct q6v5 *qproc, bool err_path)
{
int ret;
u32 val;
@@ -1006,6 +1027,9 @@ static void q6v5_mba_reclaim(struct q6v5 *qproc)
qproc->mba_size);
WARN_ON(ret);
+ if (qproc->has_mba_logs && err_path && !ret)
+ q6v5_dump_mba_logs(qproc);
+
ret = qcom_q6v5_unprepare(&qproc->q6v5);
if (ret) {
q6v5_pds_disable(qproc, qproc->proxy_pds,
@@ -1255,7 +1279,7 @@ static void qcom_q6v5_dump_segment(struct rproc *rproc,
false, true,
qproc->mpss_phys,
qproc->mpss_size);
- q6v5_mba_reclaim(qproc);
+ q6v5_mba_reclaim(qproc, false);
}
}
}
@@ -1297,7 +1321,7 @@ static int q6v5_start(struct rproc *rproc)
return 0;
reclaim_mpss:
- q6v5_mba_reclaim(qproc);
+ q6v5_mba_reclaim(qproc, true);
return ret;
}
@@ -1313,7 +1337,7 @@ static int q6v5_stop(struct rproc *rproc)
if (ret == -ETIMEDOUT)
dev_err(qproc->dev, "timed out on wait\n");
- q6v5_mba_reclaim(qproc);
+ q6v5_mba_reclaim(qproc, false);
return 0;
}
@@ -1717,6 +1741,7 @@ static int q6v5_probe(struct platform_device *pdev)
qproc->version = desc->version;
qproc->need_mem_protection = desc->need_mem_protection;
+ qproc->has_mba_logs = desc->has_mba_logs;
ret = qcom_q6v5_init(&qproc->q6v5, pdev, rproc, MPSS_CRASH_REASON_SMEM,
qcom_msa_handover);
@@ -1808,6 +1833,7 @@ static const struct rproc_hexagon_res sc7180_mss = {
},
.need_mem_protection = true,
.has_alt_reset = false,
+ .has_mba_logs = true,
.has_spare_reg = true,
.version = MSS_SC7180,
};
@@ -1843,6 +1869,7 @@ static const struct rproc_hexagon_res sdm845_mss = {
},
.need_mem_protection = true,
.has_alt_reset = true,
+ .has_mba_logs = true,
.has_spare_reg = false,
.version = MSS_SDM845,
};
@@ -1870,6 +1897,7 @@ static const struct rproc_hexagon_res msm8998_mss = {
},
.need_mem_protection = true,
.has_alt_reset = false,
+ .has_mba_logs = false,
.has_spare_reg = false,
.version = MSS_MSM8998,
};
@@ -1900,6 +1928,7 @@ static const struct rproc_hexagon_res msm8996_mss = {
},
.need_mem_protection = true,
.has_alt_reset = false,
+ .has_mba_logs = false,
.has_spare_reg = false,
.version = MSS_MSM8996,
};
@@ -1933,6 +1962,7 @@ static const struct rproc_hexagon_res msm8916_mss = {
},
.need_mem_protection = false,
.has_alt_reset = false,
+ .has_mba_logs = false,
.has_spare_reg = false,
.version = MSS_MSM8916,
};
@@ -1974,6 +2004,7 @@ static const struct rproc_hexagon_res msm8974_mss = {
},
.need_mem_protection = false,
.has_alt_reset = false,
+ .has_mba_logs = false,
.has_spare_reg = false,
.version = MSS_MSM8974,
};
--
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