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net/mlx4_en: use napi_complete_done() in TX completion 

In order to benefit from the new napi_defer_hard_irqs feature,
we need to use napi_complete_done() variant in this driver.

RX path is already using it, this patch implements TX completion side.

mlx4_en_process_tx_cq() now returns the amount of retired packets,
instead of a boolean, so that mlx4_en_poll_tx_cq() can pass
this value to napi_complete_done().

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet 2020-04-22 09:13:29 -07:00 committed by David S. Miller
parent 7e417a66b8
commit cf4058dbaa
3 changed files with 13 additions and 13 deletions
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2
drivers/net/ethernet/mellanox/mlx4/en_rx.c
View File

@ -946,7 +946,7 @@ int mlx4_en_poll_rx_cq(struct napi_struct *napi, int budget)
xdp_tx_cq = priv->tx_cq[TX_XDP][cq->ring];
if (xdp_tx_cq->xdp_busy) {
clean_complete = mlx4_en_process_tx_cq(dev, xdp_tx_cq,
budget);
budget) < budget;
xdp_tx_cq->xdp_busy = !clean_complete;
}
}

20
drivers/net/ethernet/mellanox/mlx4/en_tx.c
View File

@ -382,8 +382,8 @@ int mlx4_en_free_tx_buf(struct net_device *dev, struct mlx4_en_tx_ring *ring)
return cnt;
}
bool mlx4_en_process_tx_cq(struct net_device *dev,
struct mlx4_en_cq *cq, int napi_budget)
int mlx4_en_process_tx_cq(struct net_device *dev,
struct mlx4_en_cq *cq, int napi_budget)
{
struct mlx4_en_priv *priv = netdev_priv(dev);
struct mlx4_cq *mcq = &cq->mcq;
@ -405,7 +405,7 @@ bool mlx4_en_process_tx_cq(struct net_device *dev,
u32 ring_cons;
if (unlikely(!priv->port_up))
return true;
return 0;
netdev_txq_bql_complete_prefetchw(ring->tx_queue);
@ -480,7 +480,7 @@ bool mlx4_en_process_tx_cq(struct net_device *dev,
WRITE_ONCE(ring->cons, ring_cons + txbbs_skipped);
if (cq->type == TX_XDP)
return done < budget;
return done;
netdev_tx_completed_queue(ring->tx_queue, packets, bytes);
@ -492,7 +492,7 @@ bool mlx4_en_process_tx_cq(struct net_device *dev,
ring->wake_queue++;
}
return done < budget;
return done;
}
void mlx4_en_tx_irq(struct mlx4_cq *mcq)
@ -512,14 +512,14 @@ int mlx4_en_poll_tx_cq(struct napi_struct *napi, int budget)
struct mlx4_en_cq *cq = container_of(napi, struct mlx4_en_cq, napi);
struct net_device *dev = cq->dev;
struct mlx4_en_priv *priv = netdev_priv(dev);
bool clean_complete;
int work_done;
clean_complete = mlx4_en_process_tx_cq(dev, cq, budget);
if (!clean_complete)
work_done = mlx4_en_process_tx_cq(dev, cq, budget);
if (work_done >= budget)
return budget;
napi_complete(napi);
mlx4_en_arm_cq(priv, cq);
if (napi_complete_done(napi, work_done))
mlx4_en_arm_cq(priv, cq);
return 0;
}

4
drivers/net/ethernet/mellanox/mlx4/mlx4_en.h
View File

@ -737,8 +737,8 @@ int mlx4_en_process_rx_cq(struct net_device *dev,
int budget);
int mlx4_en_poll_rx_cq(struct napi_struct *napi, int budget);
int mlx4_en_poll_tx_cq(struct napi_struct *napi, int budget);
bool mlx4_en_process_tx_cq(struct net_device *dev,
struct mlx4_en_cq *cq, int napi_budget);
int mlx4_en_process_tx_cq(struct net_device *dev,
struct mlx4_en_cq *cq, int napi_budget);
u32 mlx4_en_free_tx_desc(struct mlx4_en_priv *priv,
struct mlx4_en_tx_ring *ring,
int index, u64 timestamp,