bnxt: add pause frame stats

These stats are already reported in ethtool -S.
Michael confirms they are equivalent to standard stats.

v2: - fix sparse warning about endian by using the macro
    - use u64 for pointer type

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Reviewed-by: Saeed Mahameed <saeedm@nvidia.com>
Reviewed-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c b/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c
index d0928334bdc85906289f940ee6042db46d719e71..5a65f28ef7714bd8466bcdf6800460a8e0e4353f 100644 (file)
--- a/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c
+++ b/drivers/net/ethernet/broadcom/bnxt/bnxt_ethtool.c
@@ -1778,6 +1778,22 @@ static void bnxt_get_pauseparam(struct net_device *dev,
        epause->tx_pause = !!(link_info->req_flow_ctrl & BNXT_LINK_PAUSE_TX);
 }
 
+static void bnxt_get_pause_stats(struct net_device *dev,
+                                struct ethtool_pause_stats *epstat)
+{
+       struct bnxt *bp = netdev_priv(dev);
+       u64 *rx, *tx;
+
+       if (BNXT_VF(bp) || !(bp->flags & BNXT_FLAG_PORT_STATS))
+               return;
+
+       rx = bp->port_stats.sw_stats;
+       tx = bp->port_stats.sw_stats + BNXT_TX_PORT_STATS_BYTE_OFFSET / 8;
+
+       epstat->rx_pause_frames = BNXT_GET_RX_PORT_STATS64(rx, rx_pause_frames);
+       epstat->tx_pause_frames = BNXT_GET_TX_PORT_STATS64(tx, tx_pause_frames);
+}
+
 static int bnxt_set_pauseparam(struct net_device *dev,
                               struct ethtool_pauseparam *epause)
 {
@@ -3645,6 +3661,7 @@ const struct ethtool_ops bnxt_ethtool_ops = {
                                     ETHTOOL_COALESCE_USE_ADAPTIVE_RX,
        .get_link_ksettings     = bnxt_get_link_ksettings,
        .set_link_ksettings     = bnxt_set_link_ksettings,
+       .get_pause_stats        = bnxt_get_pause_stats,
        .get_pauseparam         = bnxt_get_pauseparam,
        .set_pauseparam         = bnxt_set_pauseparam,
        .get_drvinfo            = bnxt_get_drvinfo,