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| author |   Brenden Blanco <bblanco@plumgrid.com> | 2016-07-19 12:16:50 -0700 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2016-07-19 21:46:32 -0700 |
| commit | 47a38e155037f417c5740e24ccae6482aedf4b68 (patch) | |
| tree | c615b0df2ff096b528d723dc2aa029172fc31ac3 /drivers/net/ethernet/mellanox/mlx4/mlx4_en.h | |
| parent | rtnl: add option for setting link xdp prog (diff) | |
| download | linux-dev-47a38e155037f417c5740e24ccae6482aedf4b68.tar.xz linux-dev-47a38e155037f417c5740e24ccae6482aedf4b68.zip | |
net/mlx4_en: add support for fast rx drop bpf program
Add support for the BPF_PROG_TYPE_XDP hook in mlx4 driver.
In tc/socket bpf programs, helpers linearize skb fragments as needed
when the program touches the packet data. However, in the pursuit of
speed, XDP programs will not be allowed to use these slower functions,
especially if it involves allocating an skb.
Therefore, disallow MTU settings that would produce a multi-fragment
packet that XDP programs would fail to access. Future enhancements could
be done to increase the allowable MTU.
The xdp program is present as a per-ring data structure, but as of yet
it is not possible to set at that granularity through any ndo.
Signed-off-by: Brenden Blanco <bblanco@plumgrid.com>
Acked-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to '')
| -rw-r--r-- | drivers/net/ethernet/mellanox/mlx4/mlx4_en.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/net/ethernet/mellanox/mlx4/mlx4_en.h b/drivers/net/ethernet/mellanox/mlx4/mlx4_en.h index d39bf594abe4..eb1238d05ca8 100644 --- a/drivers/net/ethernet/mellanox/mlx4/mlx4_en.h +++ b/drivers/net/ethernet/mellanox/mlx4/mlx4_en.h @@ -164,6 +164,10 @@ enum { #define MLX4_LOOPBACK_TEST_PAYLOAD (HEADER_COPY_SIZE - ETH_HLEN) #define MLX4_EN_MIN_MTU 46 +/* VLAN_HLEN is added twice,to support skb vlan tagged with multiple + * headers. (For example: ETH_P_8021Q and ETH_P_8021AD). + */ +#define MLX4_EN_EFF_MTU(mtu) ((mtu) + ETH_HLEN + (2 * VLAN_HLEN)) #define ETH_BCAST 0xffffffffffffULL #define MLX4_EN_LOOPBACK_RETRIES 5 @@ -319,6 +323,7 @@ struct mlx4_en_rx_ring { u8 fcs_del; void *buf; void *rx_info; + struct bpf_prog *xdp_prog; unsigned long bytes; unsigned long packets; unsigned long csum_ok; @@ -558,6 +563,7 @@ struct mlx4_en_priv { struct mlx4_en_frag_info frag_info[MLX4_EN_MAX_RX_FRAGS]; u16 num_frags; u16 log_rx_info; + int xdp_ring_num; struct mlx4_en_tx_ring **tx_ring; struct mlx4_en_rx_ring *rx_ring[MAX_RX_RINGS]; |