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Date: Tue, 13 Mar 2012 19:22:03 +0200
From: Amir Vadai <amirv@...lanox.com>
To: "David S. Miller" <davem@...emloft.net>
Cc: netdev@...r.kernel.org, Roland Dreier <roland@...estorage.com>,
Oren Duer <oren@...lanox.com>,
Amir Vadai <amirv@...lanox.co.il>
Subject: [PATCH 8/8] net/mlx4_en: num cores tx rings for every UP
From: Amir Vadai <amirv@...lanox.co.il>
Instead of having num cores tx rings for untagged traffic and only 1 tx ring
per UP, allocate num cores * num UP's tx rings - There is no reason why all
cores will share the same tx_ring when using tagged traffic.
Signed-off-by: Amir Vadai <amirv@...lanox.co.il>
---
drivers/net/ethernet/mellanox/mlx4/en_main.c | 6 ++++--
drivers/net/ethernet/mellanox/mlx4/en_netdev.c | 23 ++++++++++++++++++++---
drivers/net/ethernet/mellanox/mlx4/en_tx.c | 5 +++--
drivers/net/ethernet/mellanox/mlx4/mlx4_en.h | 6 ++++--
4 files changed, 31 insertions(+), 9 deletions(-)
diff --git a/drivers/net/ethernet/mellanox/mlx4/en_main.c b/drivers/net/ethernet/mellanox/mlx4/en_main.c
index 346fdb2..988b242 100644
--- a/drivers/net/ethernet/mellanox/mlx4/en_main.c
+++ b/drivers/net/ethernet/mellanox/mlx4/en_main.c
@@ -101,6 +101,8 @@ static int mlx4_en_get_profile(struct mlx4_en_dev *mdev)
int i;
params->udp_rss = udp_rss;
+ params->num_tx_rings_p_up = min_t(int, num_online_cpus(),
+ MLX4_EN_MAX_TX_RING_P_UP);
if (params->udp_rss && !(mdev->dev->caps.flags
& MLX4_DEV_CAP_FLAG_UDP_RSS)) {
mlx4_warn(mdev, "UDP RSS is not supported on this device.\n");
@@ -113,8 +115,8 @@ static int mlx4_en_get_profile(struct mlx4_en_dev *mdev)
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;
- params->prof[i].tx_ring_num = MLX4_EN_NUM_TX_RINGS +
- MLX4_EN_NUM_PPP_RINGS;
+ params->prof[i].tx_ring_num = params->num_tx_rings_p_up *
+ MLX4_EN_NUM_UP;
params->prof[i].rss_rings = 0;
}
diff --git a/drivers/net/ethernet/mellanox/mlx4/en_netdev.c b/drivers/net/ethernet/mellanox/mlx4/en_netdev.c
index 22c4da6..993e148 100644
--- a/drivers/net/ethernet/mellanox/mlx4/en_netdev.c
+++ b/drivers/net/ethernet/mellanox/mlx4/en_netdev.c
@@ -659,7 +659,7 @@ int mlx4_en_start_port(struct net_device *dev)
/* Configure ring */
tx_ring = &priv->tx_ring[i];
err = mlx4_en_activate_tx_ring(priv, tx_ring, cq->mcq.cqn,
- max(0, i - MLX4_EN_NUM_TX_RINGS));
+ i / priv->mdev->profile.num_tx_rings_p_up);
if (err) {
en_err(priv, "Failed allocating Tx ring\n");
mlx4_en_deactivate_cq(priv, cq);
@@ -991,6 +991,8 @@ void mlx4_en_destroy_netdev(struct net_device *dev)
#ifdef CONFIG_MLX4_EN_DCB
vfree(priv->mlx4_en_ieee_ets);
#endif
+ vfree(priv->tx_ring);
+ vfree(priv->tx_cq);
free_netdev(dev);
}
@@ -1073,6 +1075,7 @@ int mlx4_en_init_netdev(struct mlx4_en_dev *mdev, int port,
struct mlx4_en_priv *priv;
int i;
int err;
+ unsigned int q, offset = 0;
dev = alloc_etherdev_mqs(sizeof(struct mlx4_en_priv),
prof->tx_ring_num, prof->rx_ring_num);
@@ -1098,6 +1101,17 @@ int mlx4_en_init_netdev(struct mlx4_en_dev *mdev, int port,
priv->ctrl_flags = cpu_to_be32(MLX4_WQE_CTRL_CQ_UPDATE |
MLX4_WQE_CTRL_SOLICITED);
priv->tx_ring_num = prof->tx_ring_num;
+ priv->tx_ring = vzalloc(sizeof(struct mlx4_en_tx_ring) *
+ priv->tx_ring_num);
+ if (!priv->tx_ring) {
+ err = -ENOMEM;
+ goto out;
+ }
+ priv->tx_cq = vzalloc(sizeof(struct mlx4_en_cq) * priv->tx_ring_num);
+ if (!priv->tx_cq) {
+ err = -ENOMEM;
+ goto out;
+ }
priv->rx_ring_num = prof->rx_ring_num;
priv->mac_index = -1;
priv->msg_enable = MLX4_EN_MSG_LEVEL;
@@ -1155,8 +1169,11 @@ int mlx4_en_init_netdev(struct mlx4_en_dev *mdev, int port,
netdev_set_num_tc(dev, MLX4_EN_NUM_UP);
/* Partition Tx queues evenly amongst UP's */
- for (i = 0; i < MLX4_EN_NUM_UP; i++)
- netdev_set_tc_queue(dev, i, 1, MLX4_EN_NUM_TX_RINGS + i);
+ q = priv->tx_ring_num / MLX4_EN_NUM_UP;
+ for (i = 0; i < MLX4_EN_NUM_UP; i++) {
+ netdev_set_tc_queue(dev, i, q, offset);
+ offset += q;
+ }
SET_ETHTOOL_OPS(dev, &mlx4_en_ethtool_ops);
diff --git a/drivers/net/ethernet/mellanox/mlx4/en_tx.c b/drivers/net/ethernet/mellanox/mlx4/en_tx.c
index d0d96e3..c9b9e84 100644
--- a/drivers/net/ethernet/mellanox/mlx4/en_tx.c
+++ b/drivers/net/ethernet/mellanox/mlx4/en_tx.c
@@ -570,6 +570,8 @@ static void build_inline_wqe(struct mlx4_en_tx_desc *tx_desc, struct sk_buff *sk
u16 mlx4_en_select_queue(struct net_device *dev, struct sk_buff *skb)
{
+ struct mlx4_en_priv *priv = netdev_priv(dev);
+ u16 qcount = priv->mdev->profile.num_tx_rings_p_up;
int up = 0;
if (vlan_tx_tag_present(skb))
@@ -577,8 +579,7 @@ u16 mlx4_en_select_queue(struct net_device *dev, struct sk_buff *skb)
else if (dev->num_tc)
up = netdev_get_prio_tc_map(dev, skb->priority);
- return __skb_tx_hash(dev, skb, MLX4_EN_NUM_TX_RINGS,
- MLX4_EN_NUM_TX_RINGS + up, 1);
+ return __skb_tx_hash(dev, skb, qcount, qcount * up, qcount);
}
static void mlx4_bf_copy(void __iomem *dst, unsigned long *src, unsigned bytecnt)
diff --git a/drivers/net/ethernet/mellanox/mlx4/mlx4_en.h b/drivers/net/ethernet/mellanox/mlx4/mlx4_en.h
index 32b447d..a739d3e 100644
--- a/drivers/net/ethernet/mellanox/mlx4/mlx4_en.h
+++ b/drivers/net/ethernet/mellanox/mlx4/mlx4_en.h
@@ -113,6 +113,7 @@ enum {
#define MLX4_EN_NUM_TX_RINGS 8
#define MLX4_EN_NUM_PPP_RINGS 8
#define MAX_TX_RINGS (MLX4_EN_NUM_TX_RINGS + MLX4_EN_NUM_PPP_RINGS)
+#define MLX4_EN_MAX_TX_RING_P_UP 32
#define MLX4_EN_NUM_UP 8
#define MLX4_EN_DEF_TX_RING_SIZE 512
#define MLX4_EN_DEF_RX_RING_SIZE 1024
@@ -339,6 +340,7 @@ struct mlx4_en_profile {
u32 active_ports;
u32 small_pkt_int;
u8 no_reset;
+ u8 num_tx_rings_p_up;
struct mlx4_en_port_profile prof[MLX4_MAX_PORTS + 1];
};
@@ -477,9 +479,9 @@ struct mlx4_en_priv {
u16 num_frags;
u16 log_rx_info;
- struct mlx4_en_tx_ring tx_ring[MAX_TX_RINGS];
+ struct mlx4_en_tx_ring *tx_ring;
struct mlx4_en_rx_ring rx_ring[MAX_RX_RINGS];
- struct mlx4_en_cq tx_cq[MAX_TX_RINGS];
+ struct mlx4_en_cq *tx_cq;
struct mlx4_en_cq rx_cq[MAX_RX_RINGS];
struct work_struct mcast_task;
struct work_struct mac_task;
--
1.7.8.2
--
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