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Date: Mon, 23 Apr 2012 15:18:50 +0300
From: Yevgeny Petrilin <yevgenyp@...lanox.co.il>
To: <davem@...emloft.net>
CC: <netdev@...r.kernel.org>, <yevgenyp@...lanox.co.il>
Subject: [PATCH net-next 3/3] mlx4_en: Byte Queue Limit support
Signed-off-by: Yevgeny Petrilin <yevgenyp@...lanox.co.il>
---
drivers/net/ethernet/mellanox/mlx4/en_netdev.c | 4 ++++
drivers/net/ethernet/mellanox/mlx4/en_tx.c | 15 +++++++++++----
drivers/net/ethernet/mellanox/mlx4/mlx4_en.h | 2 ++
3 files changed, 17 insertions(+), 4 deletions(-)
diff --git a/drivers/net/ethernet/mellanox/mlx4/en_netdev.c b/drivers/net/ethernet/mellanox/mlx4/en_netdev.c
index 35ad097..eaa8fad 100644
--- a/drivers/net/ethernet/mellanox/mlx4/en_netdev.c
+++ b/drivers/net/ethernet/mellanox/mlx4/en_netdev.c
@@ -667,6 +667,7 @@ int mlx4_en_start_port(struct net_device *dev)
mlx4_en_deactivate_cq(priv, cq);
goto tx_err;
}
+ tx_ring->tx_queue = netdev_get_tx_queue(dev, i);
/* Arm CQ for TX completions */
mlx4_en_arm_cq(priv, cq);
@@ -812,12 +813,15 @@ static void mlx4_en_restart(struct work_struct *work)
watchdog_task);
struct mlx4_en_dev *mdev = priv->mdev;
struct net_device *dev = priv->dev;
+ int i;
en_dbg(DRV, priv, "Watchdog task called for port %d\n", priv->port);
mutex_lock(&mdev->state_lock);
if (priv->port_up) {
mlx4_en_stop_port(dev);
+ for (i = 0; i < priv->tx_ring_num; i++)
+ netdev_tx_reset_queue(priv->tx_ring[i].tx_queue);
if (mlx4_en_start_port(dev))
en_err(priv, "Failed restarting port %d\n", priv->port);
}
diff --git a/drivers/net/ethernet/mellanox/mlx4/en_tx.c b/drivers/net/ethernet/mellanox/mlx4/en_tx.c
index 2d49342..9a38483 100644
--- a/drivers/net/ethernet/mellanox/mlx4/en_tx.c
+++ b/drivers/net/ethernet/mellanox/mlx4/en_tx.c
@@ -315,6 +315,8 @@ static void mlx4_en_process_tx_cq(struct net_device *dev, struct mlx4_en_cq *cq)
int size = cq->size;
u32 size_mask = ring->size_mask;
struct mlx4_cqe *buf = cq->buf;
+ u32 packets = 0;
+ u32 bytes = 0;
if (!priv->port_up)
return;
@@ -343,6 +345,8 @@ static void mlx4_en_process_tx_cq(struct net_device *dev, struct mlx4_en_cq *cq)
priv, ring, ring_index,
!!((ring->cons + txbbs_skipped) &
ring->size));
+ packets++;
+ bytes += ring->tx_info[ring_index].nr_bytes;
} while (ring_index != new_index);
++cons_index;
@@ -359,13 +363,14 @@ static void mlx4_en_process_tx_cq(struct net_device *dev, struct mlx4_en_cq *cq)
mlx4_cq_set_ci(mcq);
wmb();
ring->cons += txbbs_skipped;
+ netdev_tx_completed_queue(ring->tx_queue, packets, bytes);
/* Wakeup Tx queue if this ring stopped it */
if (unlikely(ring->blocked)) {
if ((u32) (ring->prod - ring->cons) <=
ring->size - HEADROOM - MAX_DESC_TXBBS) {
ring->blocked = 0;
- netif_tx_wake_queue(netdev_get_tx_queue(dev, cq->ring));
+ netif_tx_wake_queue(ring->tx_queue);
priv->port_stats.wake_queue++;
}
}
@@ -583,7 +588,7 @@ netdev_tx_t mlx4_en_xmit(struct sk_buff *skb, struct net_device *dev)
if (unlikely(((int)(ring->prod - ring->cons)) >
ring->size - HEADROOM - MAX_DESC_TXBBS)) {
/* every full Tx ring stops queue */
- netif_tx_stop_queue(netdev_get_tx_queue(dev, tx_ind));
+ netif_tx_stop_queue(ring->tx_queue);
ring->blocked = 1;
priv->port_stats.queue_stopped++;
@@ -649,7 +654,7 @@ netdev_tx_t mlx4_en_xmit(struct sk_buff *skb, struct net_device *dev)
priv->port_stats.tso_packets++;
i = ((skb->len - lso_header_size) / skb_shinfo(skb)->gso_size) +
!!((skb->len - lso_header_size) % skb_shinfo(skb)->gso_size);
- ring->bytes += skb->len + (i - 1) * lso_header_size;
+ tx_info->nr_bytes = skb->len + (i - 1) * lso_header_size;
ring->packets += i;
} else {
/* Normal (Non LSO) packet */
@@ -657,10 +662,12 @@ netdev_tx_t mlx4_en_xmit(struct sk_buff *skb, struct net_device *dev)
((ring->prod & ring->size) ?
cpu_to_be32(MLX4_EN_BIT_DESC_OWN) : 0);
data = &tx_desc->data;
- ring->bytes += max(skb->len, (unsigned int) ETH_ZLEN);
+ tx_info->nr_bytes = max_t(unsigned int, skb->len, ETH_ZLEN);
ring->packets++;
}
+ ring->bytes += tx_info->nr_bytes;
+ netdev_tx_sent_queue(ring->tx_queue, tx_info->nr_bytes);
AVG_PERF_COUNTER(priv->pstats.tx_pktsz_avg, skb->len);
diff --git a/drivers/net/ethernet/mellanox/mlx4/mlx4_en.h b/drivers/net/ethernet/mellanox/mlx4/mlx4_en.h
index ed8bdd9..14a18c6 100644
--- a/drivers/net/ethernet/mellanox/mlx4/mlx4_en.h
+++ b/drivers/net/ethernet/mellanox/mlx4/mlx4_en.h
@@ -199,6 +199,7 @@ enum cq_type {
struct mlx4_en_tx_info {
struct sk_buff *skb;
u32 nr_txbb;
+ u32 nr_bytes;
u8 linear;
u8 data_offset;
u8 inl;
@@ -256,6 +257,7 @@ struct mlx4_en_tx_ring {
unsigned long tx_csum;
struct mlx4_bf bf;
bool bf_enabled;
+ struct netdev_queue *tx_queue;
};
struct mlx4_en_rx_desc {
--
1.7.7
--
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