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Date: Mon, 21 Nov 2011 10:43:48 +0200 From: Yevgeny Petrilin <yevgenyp@...lanox.co.il> To: <davem@...emloft.net> CC: <netdev@...r.kernel.org>, <yevgenyp@...lanox.co.il>, <ogerlitz@...lanox.com>, <oren@...lanox.co.il>, <amirv@...lanox.co.il> Subject: [PATCH 6/8] net/mlx4_en: allow setting number of rx rings for, RSS/TCP From: Amir Vadai <amirv@...lanox.co.il> Make RSS TCP divert packets only to part of the rx rings, other could be accessed by using flow steering or RFS acceleration Signed-off-by: Amir Vadai <amirv@...lanox.co.il> --- drivers/net/ethernet/mellanox/mlx4/en_main.c | 7 ++++--- drivers/net/ethernet/mellanox/mlx4/en_rx.c | 9 ++++++++- 2 files changed, 12 insertions(+), 4 deletions(-) diff --git a/drivers/net/ethernet/mellanox/mlx4/en_main.c b/drivers/net/ethernet/mellanox/mlx4/en_main.c index a06096f..f70bafb 100644 --- a/drivers/net/ethernet/mellanox/mlx4/en_main.c +++ b/drivers/net/ethernet/mellanox/mlx4/en_main.c @@ -63,9 +63,10 @@ static const char mlx4_en_version[] = */ -/* Enable RSS TCP traffic */ -MLX4_EN_PARM_INT(tcp_rss, 1, - "Enable RSS for incomming TCP traffic or disabled (0)"); +/* RSS TCP usage */ +MLX4_EN_PARM_INT(tcp_rss, -1, + "0 to disable RSS TCP, if n > 0, use n rx rings by RSS TCP. -1 " + "for all rx rings"); /* Enable RSS UDP traffic */ MLX4_EN_PARM_INT(udp_rss, 1, "Enable RSS for incomming UDP traffic or disabled (0)"); diff --git a/drivers/net/ethernet/mellanox/mlx4/en_rx.c b/drivers/net/ethernet/mellanox/mlx4/en_rx.c index 3c24e16..044123a 100644 --- a/drivers/net/ethernet/mellanox/mlx4/en_rx.c +++ b/drivers/net/ethernet/mellanox/mlx4/en_rx.c @@ -834,6 +834,7 @@ int mlx4_en_config_rss_steer(struct mlx4_en_priv *priv) struct mlx4_en_rss_map *rss_map = &priv->rss_map; struct mlx4_qp_context context; struct mlx4_rss_context *rss_context; + int tcp_rss_table_size; void *ptr; u8 rss_mask = (MLX4_RSS_IPV4 | MLX4_RSS_TCP_IPV4 | MLX4_RSS_IPV6 | MLX4_RSS_TCP_IPV6); @@ -874,10 +875,16 @@ int mlx4_en_config_rss_steer(struct mlx4_en_priv *priv) mlx4_en_fill_qp_context(priv, 0, 0, 0, 1, priv->base_qpn, priv->rx_ring[0].cqn, &context); + if (priv->mdev->profile.tcp_rss == -1 || + priv->mdev->profile.tcp_rss > priv->rx_ring_num) + tcp_rss_table_size = priv->rx_ring_num; + else + tcp_rss_table_size = max(1, priv->mdev->profile.tcp_rss); + ptr = ((void *) &context) + offsetof(struct mlx4_qp_context, pri_path) + MLX4_RSS_OFFSET_IN_QPC_PRI_PATH; rss_context = ptr; - rss_context->base_qpn = cpu_to_be32(ilog2(priv->rx_ring_num) << 24 | + rss_context->base_qpn = cpu_to_be32(ilog2(tcp_rss_table_size) << 24 | (rss_map->base_qpn)); if (priv->mdev->profile.udp_rss) { rss_mask |= MLX4_RSS_UDP_IPV4 | MLX4_RSS_UDP_IPV6; -- 1.7.7 -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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