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net/mlx4_en: Fix mixed PFC and Global pause user control requests 

Global pause and PFC configuration should be mutually exclusive (i.e. only
one of them at most can be set). However, once PFC was turned off,
driver automatically turned Global pause on. This is a bug.

Fix the driver behaviour to turn off PFC/Global once the user turned the
other on.

This also fixed a weird behaviour that at a current time, the profile
had both PFC and global pause configuration turned on, which is
Hardware-wise impossible and caused returning false positive indication
to query tools.

In addition, fix error code when setting global pause or PFC to change
metadata only upon successful change.

Also, removed useless debug print.

Fixes: af7d518526 ("net/mlx4_en: Add DCB PFC support through CEE netlink commands")
Fixes: c27a02cd94 ("mlx4_en: Add driver for Mellanox ConnectX 10GbE NIC")
Signed-off-by: Eran Ben Elisha <eranbe@mellanox.com>
Signed-off-by: Tariq Toukan <tariqt@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eran Ben Elisha 2018-03-27 14:41:18 +03:00 committed by David S. Miller
parent ab6f6dd18a
commit 6e8814ceb7
3 changed files with 62 additions and 47 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

72
drivers/net/ethernet/mellanox/mlx4/en_dcb_nl.c
View File

@ -156,57 +156,63 @@ static int mlx4_en_dcbnl_getnumtcs(struct net_device *netdev, int tcid, u8 *num)
static u8 mlx4_en_dcbnl_set_all(struct net_device *netdev)
{
struct mlx4_en_priv *priv = netdev_priv(netdev);
struct mlx4_en_port_profile *prof = priv->prof;
struct mlx4_en_dev *mdev = priv->mdev;
u8 tx_pause, tx_ppp, rx_pause, rx_ppp;
if (!(priv->dcbx_cap & DCB_CAP_DCBX_VER_CEE))
return 1;
if (priv->cee_config.pfc_state) {
int tc;
rx_ppp = prof->rx_ppp;
tx_ppp = prof->tx_ppp;
priv->prof->rx_pause = 0;
priv->prof->tx_pause = 0;
for (tc = 0; tc < CEE_DCBX_MAX_PRIO; tc++) {
u8 tc_mask = 1 << tc;
switch (priv->cee_config.dcb_pfc[tc]) {
case pfc_disabled:
priv->prof->tx_ppp &= ~tc_mask;
priv->prof->rx_ppp &= ~tc_mask;
tx_ppp &= ~tc_mask;
rx_ppp &= ~tc_mask;
break;
case pfc_enabled_full:
priv->prof->tx_ppp |= tc_mask;
priv->prof->rx_ppp |= tc_mask;
tx_ppp |= tc_mask;
rx_ppp |= tc_mask;
break;
case pfc_enabled_tx:
priv->prof->tx_ppp |= tc_mask;
priv->prof->rx_ppp &= ~tc_mask;
tx_ppp |= tc_mask;
rx_ppp &= ~tc_mask;
break;
case pfc_enabled_rx:
priv->prof->tx_ppp &= ~tc_mask;
priv->prof->rx_ppp |= tc_mask;
tx_ppp &= ~tc_mask;
rx_ppp |= tc_mask;
break;
default:
break;
}
}
en_dbg(DRV, priv, "Set pfc on\n");
rx_pause = !!(rx_ppp || tx_ppp) ? 0 : prof->rx_pause;
tx_pause = !!(rx_ppp || tx_ppp) ? 0 : prof->tx_pause;
} else {
priv->prof->rx_pause = 1;
priv->prof->tx_pause = 1;
en_dbg(DRV, priv, "Set pfc off\n");
rx_ppp = 0;
tx_ppp = 0;
rx_pause = prof->rx_pause;
tx_pause = prof->tx_pause;
}
if (mlx4_SET_PORT_general(mdev->dev, priv->port,
priv->rx_skb_size + ETH_FCS_LEN,
priv->prof->tx_pause,
priv->prof->tx_ppp,
priv->prof->rx_pause,
priv->prof->rx_ppp)) {
tx_pause, tx_ppp, rx_pause, rx_ppp)) {
en_err(priv, "Failed setting pause params\n");
return 1;
}
prof->tx_ppp = tx_ppp;
prof->rx_ppp = rx_ppp;
prof->tx_pause = tx_pause;
prof->rx_pause = rx_pause;
return 0;
}
@ -408,6 +414,7 @@ static int mlx4_en_dcbnl_ieee_setpfc(struct net_device *dev,
struct mlx4_en_priv *priv = netdev_priv(dev);
struct mlx4_en_port_profile *prof = priv->prof;
struct mlx4_en_dev *mdev = priv->mdev;
u32 tx_pause, tx_ppp, rx_pause, rx_ppp;
int err;
en_dbg(DRV, priv, "cap: 0x%x en: 0x%x mbc: 0x%x delay: %d\n",
@ -416,23 +423,26 @@ static int mlx4_en_dcbnl_ieee_setpfc(struct net_device *dev,
pfc->mbc,
pfc->delay);
prof->rx_pause = !pfc->pfc_en;
prof->tx_pause = !pfc->pfc_en;
prof->rx_ppp = pfc->pfc_en;
prof->tx_ppp = pfc->pfc_en;
rx_pause = prof->rx_pause && !pfc->pfc_en;
tx_pause = prof->tx_pause && !pfc->pfc_en;
rx_ppp = pfc->pfc_en;
tx_ppp = pfc->pfc_en;
err = mlx4_SET_PORT_general(mdev->dev, priv->port,
priv->rx_skb_size + ETH_FCS_LEN,
prof->tx_pause,
prof->tx_ppp,
prof->rx_pause,
prof->rx_ppp);
if (err)
tx_pause, tx_ppp, rx_pause, rx_ppp);
if (err) {
en_err(priv, "Failed setting pause params\n");
else
mlx4_en_update_pfc_stats_bitmap(mdev->dev, &priv->stats_bitmap,
prof->rx_ppp, prof->rx_pause,
prof->tx_ppp, prof->tx_pause);
return err;
}
mlx4_en_update_pfc_stats_bitmap(mdev->dev, &priv->stats_bitmap,
rx_ppp, rx_pause, tx_ppp, tx_pause);
prof->tx_ppp = tx_ppp;
prof->rx_ppp = rx_ppp;
prof->rx_pause = rx_pause;
prof->tx_pause = tx_pause;
return err;
}

33
drivers/net/ethernet/mellanox/mlx4/en_ethtool.c
View File

@ -1046,27 +1046,32 @@ static int mlx4_en_set_pauseparam(struct net_device *dev,
{
struct mlx4_en_priv *priv = netdev_priv(dev);
struct mlx4_en_dev *mdev = priv->mdev;
u8 tx_pause, tx_ppp, rx_pause, rx_ppp;
int err;
if (pause->autoneg)
return -EINVAL;
priv->prof->tx_pause = pause->tx_pause != 0;
priv->prof->rx_pause = pause->rx_pause != 0;
tx_pause = !!(pause->tx_pause);
rx_pause = !!(pause->rx_pause);
rx_ppp = priv->prof->rx_ppp && !(tx_pause || rx_pause);
tx_ppp = priv->prof->tx_ppp && !(tx_pause || rx_pause);
err = mlx4_SET_PORT_general(mdev->dev, priv->port,
priv->rx_skb_size + ETH_FCS_LEN,
priv->prof->tx_pause,
priv->prof->tx_ppp,
priv->prof->rx_pause,
priv->prof->rx_ppp);
if (err)
en_err(priv, "Failed setting pause params\n");
else
mlx4_en_update_pfc_stats_bitmap(mdev->dev, &priv->stats_bitmap,
priv->prof->rx_ppp,
priv->prof->rx_pause,
priv->prof->tx_ppp,
priv->prof->tx_pause);
tx_pause, tx_ppp, rx_pause, rx_ppp);
if (err) {
en_err(priv, "Failed setting pause params, err = %d\n", err);
return err;
}
mlx4_en_update_pfc_stats_bitmap(mdev->dev, &priv->stats_bitmap,
rx_ppp, rx_pause, tx_ppp, tx_pause);
priv->prof->tx_pause = tx_pause;
priv->prof->rx_pause = rx_pause;
priv->prof->tx_ppp = tx_ppp;
priv->prof->rx_ppp = rx_ppp;
return err;
}

4
drivers/net/ethernet/mellanox/mlx4/en_main.c
View File

@ -163,9 +163,9 @@ static void mlx4_en_get_profile(struct mlx4_en_dev *mdev)
params->udp_rss = 0;
}
for (i = 1; i <= MLX4_MAX_PORTS; i++) {
params->prof[i].rx_pause = 1;
params->prof[i].rx_pause = !(pfcrx || pfctx);
params->prof[i].rx_ppp = pfcrx;
params->prof[i].tx_pause = 1;
params->prof[i].tx_pause = !(pfcrx || pfctx);
params->prof[i].tx_ppp = pfctx;
params->prof[i].tx_ring_size = MLX4_EN_DEF_TX_RING_SIZE;
params->prof[i].rx_ring_size = MLX4_EN_DEF_RX_RING_SIZE;