From: Stefan Wahren <stefan.wahren@i2se.com>
To: "David S. Miller" <davem@davemloft.net>,
Jakub Kicinski <kuba@kernel.org>
Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
Stefan Wahren <stefan.wahren@i2se.com>
Subject: [PATCH 3/3 net-next] net: qca_spi: Introduce stat about bad signature
Date: Sat, 8 May 2021 14:36:35 +0200 [thread overview]
Message-ID: <1620477395-12740-4-git-send-email-stefan.wahren@i2se.com> (raw)
In-Reply-To: <1620477395-12740-1-git-send-email-stefan.wahren@i2se.com>
In order to identify significant signature issues add a new stat counter,
which increases on bad signature values that causes a sync loss.
Signed-off-by: Stefan Wahren <stefan.wahren@i2se.com>
---
drivers/net/ethernet/qualcomm/qca_debug.c | 1 +
drivers/net/ethernet/qualcomm/qca_spi.c | 4 ++++
drivers/net/ethernet/qualcomm/qca_spi.h | 1 +
3 files changed, 6 insertions(+)
diff --git a/drivers/net/ethernet/qualcomm/qca_debug.c b/drivers/net/ethernet/qualcomm/qca_debug.c
index 702aa21..d59fff2 100644
--- a/drivers/net/ethernet/qualcomm/qca_debug.c
+++ b/drivers/net/ethernet/qualcomm/qca_debug.c
@@ -62,6 +62,7 @@ static const char qcaspi_gstrings_stats[][ETH_GSTRING_LEN] = {
"SPI errors",
"Write verify errors",
"Buffer available errors",
+ "Bad signature",
};
#ifdef CONFIG_DEBUG_FS
diff --git a/drivers/net/ethernet/qualcomm/qca_spi.c b/drivers/net/ethernet/qualcomm/qca_spi.c
index 0937ceb..79fe3ec 100644
--- a/drivers/net/ethernet/qualcomm/qca_spi.c
+++ b/drivers/net/ethernet/qualcomm/qca_spi.c
@@ -504,6 +504,9 @@ qcaspi_qca7k_sync(struct qcaspi *qca, int event)
qcaspi_read_register(qca, SPI_REG_SIGNATURE, &signature);
qcaspi_read_register(qca, SPI_REG_SIGNATURE, &signature);
if (signature != QCASPI_GOOD_SIGNATURE) {
+ if (qca->sync == QCASPI_SYNC_READY)
+ qca->stats.bad_signature++;
+
qca->sync = QCASPI_SYNC_UNKNOWN;
netdev_dbg(qca->net_dev, "sync: got CPU on, but signature was invalid, restart\n");
return;
@@ -531,6 +534,7 @@ qcaspi_qca7k_sync(struct qcaspi *qca, int event)
if (signature != QCASPI_GOOD_SIGNATURE) {
qca->sync = QCASPI_SYNC_UNKNOWN;
+ qca->stats.bad_signature++;
netdev_dbg(qca->net_dev, "sync: bad signature, restart\n");
/* don't reset right away */
return;
diff --git a/drivers/net/ethernet/qualcomm/qca_spi.h b/drivers/net/ethernet/qualcomm/qca_spi.h
index d13a67e..3067356 100644
--- a/drivers/net/ethernet/qualcomm/qca_spi.h
+++ b/drivers/net/ethernet/qualcomm/qca_spi.h
@@ -75,6 +75,7 @@ struct qcaspi_stats {
u64 spi_err;
u64 write_verify_failed;
u64 buf_avail_err;
+ u64 bad_signature;
};
struct qcaspi {
--
2.7.4
next prev parent reply other threads:[~2021-05-08 12:37 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-05-08 12:36 [PATCH 0/3 net-next] net: qca_spi: Improve sync handling Stefan Wahren
2021-05-08 12:36 ` [PATCH 1/3 net-next] net: qca_spi: Avoid reading signature three times in a row Stefan Wahren
2021-05-08 12:36 ` [PATCH 2/3 net-next] net: qca_spi: Avoid re-sync for single signature error Stefan Wahren
2021-05-08 12:36 ` Stefan Wahren [this message]
2021-05-10 21:40 ` [PATCH 0/3 net-next] net: qca_spi: Improve sync handling patchwork-bot+netdevbpf
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