For changes in the mlx4 ethernet driver, please use "net/mlx4_en" prefix
in patch subject.
On 9/28/2021 4:26 PM, Joshua Roys wrote:
Address feedback for XDP_REDIRECT patch.
Description is not helpful at all.
Please provide technical description of the content, motivation, why it
is needed, etc...
Signed-off-by: Joshua Roys <roysjosh@xxxxxxxxx>
---
.../net/ethernet/mellanox/mlx4/en_ethtool.c | 8 ++++++++
drivers/net/ethernet/mellanox/mlx4/en_port.c | 18 +++++++++++-------
drivers/net/ethernet/mellanox/mlx4/en_rx.c | 4 +++-
drivers/net/ethernet/mellanox/mlx4/mlx4_en.h | 2 ++
.../net/ethernet/mellanox/mlx4/mlx4_stats.h | 4 +++-
5 files changed, 27 insertions(+), 9 deletions(-)
Tested with VPP 21.06 on Fedora 34.
diff --git a/drivers/net/ethernet/mellanox/mlx4/en_ethtool.c b/drivers/net/ethernet/mellanox/mlx4/en_ethtool.c
index ef518b1040f7..66c8ae29bc7a 100644
--- a/drivers/net/ethernet/mellanox/mlx4/en_ethtool.c
+++ b/drivers/net/ethernet/mellanox/mlx4/en_ethtool.c
@@ -197,6 +197,8 @@ static const char main_strings[][ETH_GSTRING_LEN] = {
/* xdp statistics */
"rx_xdp_drop",
+ "rx_xdp_redirect",
+ "rx_xdp_redirect_fail",
"rx_xdp_tx",
"rx_xdp_tx_full",
@@ -428,6 +430,8 @@ static void mlx4_en_get_ethtool_stats(struct net_device *dev,
data[index++] = priv->rx_ring[i]->bytes;
data[index++] = priv->rx_ring[i]->dropped;
data[index++] = priv->rx_ring[i]->xdp_drop;
+ data[index++] = priv->rx_ring[i]->xdp_redirect;
+ data[index++] = priv->rx_ring[i]->xdp_redirect_fail;
data[index++] = priv->rx_ring[i]->xdp_tx;
data[index++] = priv->rx_ring[i]->xdp_tx_full;
}
@@ -519,6 +523,10 @@ static void mlx4_en_get_strings(struct net_device *dev,
"rx%d_dropped", i);
sprintf(data + (index++) * ETH_GSTRING_LEN,
"rx%d_xdp_drop", i);
+ sprintf(data + (index++) * ETH_GSTRING_LEN,
+ "rx%d_xdp_redirect", i);
+ sprintf(data + (index++) * ETH_GSTRING_LEN,
+ "rx%d_xdp_redirect_fail", i);
sprintf(data + (index++) * ETH_GSTRING_LEN,
"rx%d_xdp_tx", i);
sprintf(data + (index++) * ETH_GSTRING_LEN,
diff --git a/drivers/net/ethernet/mellanox/mlx4/en_port.c b/drivers/net/ethernet/mellanox/mlx4/en_port.c
index 0158b88bea5b..043cc9d75b3e 100644
--- a/drivers/net/ethernet/mellanox/mlx4/en_port.c
+++ b/drivers/net/ethernet/mellanox/mlx4/en_port.c
@@ -239,13 +239,15 @@ int mlx4_en_DUMP_ETH_STATS(struct mlx4_en_dev *mdev, u8 port, u8 reset)
mlx4_en_fold_software_stats(dev);
- priv->port_stats.rx_chksum_good = 0;
- priv->port_stats.rx_chksum_none = 0;
- priv->port_stats.rx_chksum_complete = 0;
- priv->port_stats.rx_alloc_pages = 0;
- priv->xdp_stats.rx_xdp_drop = 0;
- priv->xdp_stats.rx_xdp_tx = 0;
- priv->xdp_stats.rx_xdp_tx_full = 0;
+ priv->port_stats.rx_chksum_good = 0;
+ priv->port_stats.rx_chksum_none = 0;
+ priv->port_stats.rx_chksum_complete = 0;
+ priv->port_stats.rx_alloc_pages = 0;
+ priv->xdp_stats.rx_xdp_drop = 0;
+ priv->xdp_stats.rx_xdp_redirect = 0;
+ priv->xdp_stats.rx_xdp_redirect_fail = 0;
+ priv->xdp_stats.rx_xdp_tx = 0;
+ priv->xdp_stats.rx_xdp_tx_full = 0;
No need to touch existing lines.
Add yours without fixing the existing indintations.
for (i = 0; i < priv->rx_ring_num; i++) {
const struct mlx4_en_rx_ring *ring = priv->rx_ring[i];
@@ -255,6 +257,8 @@ int mlx4_en_DUMP_ETH_STATS(struct mlx4_en_dev *mdev, u8 port, u8 reset)
priv->port_stats.rx_chksum_complete += READ_ONCE(ring->csum_complete);
priv->port_stats.rx_alloc_pages += READ_ONCE(ring->rx_alloc_pages);
priv->xdp_stats.rx_xdp_drop += READ_ONCE(ring->xdp_drop);
+ priv->xdp_stats.rx_xdp_redirect += READ_ONCE(ring->xdp_redirect);
+ priv->xdp_stats.rx_xdp_redirect_fail += READ_ONCE(ring->xdp_redirect_fail);
priv->xdp_stats.rx_xdp_tx += READ_ONCE(ring->xdp_tx);
priv->xdp_stats.rx_xdp_tx_full += READ_ONCE(ring->xdp_tx_full);
}
diff --git a/drivers/net/ethernet/mellanox/mlx4/en_rx.c b/drivers/net/ethernet/mellanox/mlx4/en_rx.c
index 557d7daac2d3..8f09b1de4125 100644
--- a/drivers/net/ethernet/mellanox/mlx4/en_rx.c
+++ b/drivers/net/ethernet/mellanox/mlx4/en_rx.c
@@ -793,11 +793,13 @@ int mlx4_en_process_rx_cq(struct net_device *dev, struct mlx4_en_cq *cq, int bud
case XDP_PASS:
break;
case XDP_REDIRECT:
- if (xdp_do_redirect(dev, &xdp, xdp_prog) >= 0) {
+ if (!xdp_do_redirect(dev, &xdp, xdp_prog)) {
use likely()
+ ring->xdp_redirect++;
xdp_redir_flush = true;
frags[0].page = NULL;
goto next;
}
+ ring->xdp_redirect_fail++;
trace_xdp_exception(dev, xdp_prog, act);
goto xdp_drop_no_cnt;
case XDP_TX:
diff --git a/drivers/net/ethernet/mellanox/mlx4/mlx4_en.h b/drivers/net/ethernet/mellanox/mlx4/mlx4_en.h
index f3d1a20201ef..f6c90e97b4cd 100644
--- a/drivers/net/ethernet/mellanox/mlx4/mlx4_en.h
+++ b/drivers/net/ethernet/mellanox/mlx4/mlx4_en.h
@@ -340,6 +340,8 @@ struct mlx4_en_rx_ring {
unsigned long csum_complete;
unsigned long rx_alloc_pages;
unsigned long xdp_drop;
+ unsigned long xdp_redirect;
+ unsigned long xdp_redirect_fail;
unsigned long xdp_tx;
unsigned long xdp_tx_full;
unsigned long dropped;
diff --git a/drivers/net/ethernet/mellanox/mlx4/mlx4_stats.h b/drivers/net/ethernet/mellanox/mlx4/mlx4_stats.h
index 7b51ae8cf759..e9cd4bb6f83d 100644
--- a/drivers/net/ethernet/mellanox/mlx4/mlx4_stats.h
+++ b/drivers/net/ethernet/mellanox/mlx4/mlx4_stats.h
@@ -42,9 +42,11 @@ struct mlx4_en_port_stats {
struct mlx4_en_xdp_stats {
unsigned long rx_xdp_drop;
+ unsigned long rx_xdp_redirect;
+ unsigned long rx_xdp_redirect_fail;
unsigned long rx_xdp_tx;
unsigned long rx_xdp_tx_full;
-#define NUM_XDP_STATS 3
+#define NUM_XDP_STATS 5
};
struct mlx4_en_phy_stats {
