diff options
| author | Amir Vadai <amirv@mellanox.com> | 2012-07-18 22:33:52 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2012-07-19 08:34:37 -0700 |
| commit | 1eb8c695bda92ccaec30e9a3351e37a1896da54f (patch) | |
| tree | a5c73ef50598f37bc3bdead53425dcedb7ae9bca /drivers/net/ethernet/mellanox/mlx4/mlx4_en.h | |
| parent | d9236c3f10490cd0b3fd4516af12ba62dcbae0b0 (diff) | |
net/mlx4_en: Add accelerated RFS support
Use RFS infrastructure and flow steering in HW to keep CPU
affinity of rx interrupts and application per TCP stream.
A flow steering filter is added to the HW whenever the RFS
ndo callback is invoked by core networking code.
Because the invocation takes place in interrupt context, the
actual setup of HW is done using workqueue. Whenever new filter
is added, the driver checks for expiry of existing filters.
Since there's window in time between the point where the core
RFS code invoked the ndo callback, to the point where the HW
is configured from the workqueue context, the 2nd, 3rd etc
packets from that stream will cause the net core to invoke
the callback again and again.
To prevent inefficient/double configuration of the HW, the filters
are kept in a database which is indexed using hash function to enable
fast access.
Signed-off-by: Amir Vadai <amirv@mellanox.com>
Signed-off-by: Or Gerlitz <ogerlitz@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/mellanox/mlx4/mlx4_en.h')
| -rw-r--r-- | drivers/net/ethernet/mellanox/mlx4/mlx4_en.h | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/drivers/net/ethernet/mellanox/mlx4/mlx4_en.h b/drivers/net/ethernet/mellanox/mlx4/mlx4_en.h index a12632150b3..af34c98d43e 100644 --- a/drivers/net/ethernet/mellanox/mlx4/mlx4_en.h +++ b/drivers/net/ethernet/mellanox/mlx4/mlx4_en.h @@ -43,6 +43,7 @@ #ifdef CONFIG_MLX4_EN_DCB #include <linux/dcbnl.h> #endif +#include <linux/cpu_rmap.h> #include <linux/mlx4/device.h> #include <linux/mlx4/qp.h> @@ -77,6 +78,9 @@ #define STATS_DELAY (HZ / 4) #define MAX_NUM_OF_FS_RULES 256 +#define MLX4_EN_FILTER_HASH_SHIFT 4 +#define MLX4_EN_FILTER_EXPIRY_QUOTA 60 + /* Typical TSO descriptor with 16 gather entries is 352 bytes... */ #define MAX_DESC_SIZE 512 #define MAX_DESC_TXBBS (MAX_DESC_SIZE / TXBB_SIZE) @@ -523,6 +527,13 @@ struct mlx4_en_priv { struct ieee_ets ets; u16 maxrate[IEEE_8021QAZ_MAX_TCS]; #endif +#ifdef CONFIG_RFS_ACCEL + spinlock_t filters_lock; + int last_filter_id; + struct list_head filters; + struct hlist_head filter_hash[1 << MLX4_EN_FILTER_HASH_SHIFT]; +#endif + }; enum mlx4_en_wol { @@ -602,6 +613,11 @@ int mlx4_en_QUERY_PORT(struct mlx4_en_dev *mdev, u8 port); extern const struct dcbnl_rtnl_ops mlx4_en_dcbnl_ops; #endif +#ifdef CONFIG_RFS_ACCEL +void mlx4_en_cleanup_filters(struct mlx4_en_priv *priv, + struct mlx4_en_rx_ring *rx_ring); +#endif + #define MLX4_EN_NUM_SELF_TEST 5 void mlx4_en_ex_selftest(struct net_device *dev, u32 *flags, u64 *buf); u64 mlx4_en_mac_to_u64(u8 *addr); |