[net-next Patch v4 3/4] octeontx2-pf: ethtool: Implement get_fec_stats

From: Hariprasad Kelam
Date: Mon Dec 05 2022 - 02:06:07 EST


This patch registers a callback for get_fec_stats such that
FEC stats can be queried from the below command

"ethtool -I --show-fec eth0"

Signed-off-by: Hariprasad Kelam <hkelam@xxxxxxxxxxx>
Signed-off-by: Sunil Kovvuri Goutham <sgoutham@xxxxxxxxxxx>
---
v3 * Dont remove existing FEC stats support over
ethtool statistics (ethtool -S)
v4 * Update MAC fec stats first instead of updating
them on otx2_get_fwdata failure.

.../marvell/octeontx2/nic/otx2_ethtool.c | 34 +++++++++++++++++++
1 file changed, 34 insertions(+)

diff --git a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_ethtool.c b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_ethtool.c
index 0eb74e8c553d..0f8d1a69139f 100644
--- a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_ethtool.c
+++ b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_ethtool.c
@@ -1268,6 +1268,39 @@ static int otx2_set_link_ksettings(struct net_device *netdev,
return err;
}

+static void otx2_get_fec_stats(struct net_device *netdev,
+ struct ethtool_fec_stats *fec_stats)
+{
+ struct otx2_nic *pfvf = netdev_priv(netdev);
+ struct cgx_fw_data *rsp;
+
+ otx2_update_lmac_fec_stats(pfvf);
+
+ /* Report MAC FEC stats */
+ fec_stats->corrected_blocks.total = pfvf->hw.cgx_fec_corr_blks;
+ fec_stats->uncorrectable_blocks.total = pfvf->hw.cgx_fec_uncorr_blks;
+
+ rsp = otx2_get_fwdata(pfvf);
+ if (!IS_ERR(rsp) && rsp->fwdata.phy.misc.has_fec_stats &&
+ !otx2_get_phy_fec_stats(pfvf)) {
+ /* Fetch fwdata again because it's been recently populated with
+ * latest PHY FEC stats.
+ */
+ rsp = otx2_get_fwdata(pfvf);
+ if (!IS_ERR(rsp)) {
+ struct fec_stats_s *p = &rsp->fwdata.phy.fec_stats;
+
+ if (pfvf->linfo.fec == OTX2_FEC_BASER) {
+ fec_stats->corrected_blocks.total = p->brfec_corr_blks;
+ fec_stats->uncorrectable_blocks.total = p->brfec_uncorr_blks;
+ } else {
+ fec_stats->corrected_blocks.total = p->rsfec_corr_cws;
+ fec_stats->uncorrectable_blocks.total = p->rsfec_uncorr_cws;
+ }
+ }
+ }
+}
+
static const struct ethtool_ops otx2_ethtool_ops = {
.supported_coalesce_params = ETHTOOL_COALESCE_USECS |
ETHTOOL_COALESCE_MAX_FRAMES |
@@ -1298,6 +1331,7 @@ static const struct ethtool_ops otx2_ethtool_ops = {
.get_pauseparam = otx2_get_pauseparam,
.set_pauseparam = otx2_set_pauseparam,
.get_ts_info = otx2_get_ts_info,
+ .get_fec_stats = otx2_get_fec_stats,
.get_fecparam = otx2_get_fecparam,
.set_fecparam = otx2_set_fecparam,
.get_link_ksettings = otx2_get_link_ksettings,
--
2.17.1