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net: qca_spi: Introduce stat about bad signature

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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>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Stefan Wahren 2021-05-08 14:36:35 +02:00 committed by David S. Miller
parent 6e03f3ff29
commit a539356745
3 changed files with 6 additions and 0 deletions
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1
drivers/net/ethernet/qualcomm/qca_debug.c
View File

@ -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

4
drivers/net/ethernet/qualcomm/qca_spi.c
View File

@ -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;

1
drivers/net/ethernet/qualcomm/qca_spi.h
View File

@ -75,6 +75,7 @@ struct qcaspi_stats {
u64 spi_err;
u64 write_verify_failed;
u64 buf_avail_err;
u64 bad_signature;
};
struct qcaspi {