diff options
| author | Tariq Toukan <tariqt@mellanox.com> | 2019-10-07 14:01:29 +0300 |
|---|---|---|
| committer | Saeed Mahameed <saeedm@mellanox.com> | 2019-10-18 12:11:53 -0700 |
| commit | 84d1bb2b139e0184b1754aa1b5776186b475fce8 (patch) | |
| tree | 175d38cba24679813ba96c48ad4d332355bee665 /drivers/net/ethernet/mellanox/mlx5/core/en_accel/ktls.h | |
| parent | 700ec497424069fa4d8f3715759c4aaec016e840 (diff) | |
net/mlx5e: kTLS, Limit DUMP wqe size
HW expects the data size in DUMP WQEs to be up to MTU.
Make sure they are in range.
We elevate the frag page refcount by 'n-1', in addition to the
one obtained in tx_sync_info_get(), having an overall of 'n'
references. We bulk increments by using a single page_ref_add()
command, to optimize perfermance.
The refcounts are released one by one, by the corresponding completions.
Fixes: d2ead1f360e8 ("net/mlx5e: Add kTLS TX HW offload support")
Signed-off-by: Tariq Toukan <tariqt@mellanox.com>
Reviewed-by: Eran Ben Elisha <eranbe@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Diffstat (limited to 'drivers/net/ethernet/mellanox/mlx5/core/en_accel/ktls.h')
| -rw-r--r-- | drivers/net/ethernet/mellanox/mlx5/core/en_accel/ktls.h | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_accel/ktls.h b/drivers/net/ethernet/mellanox/mlx5/core/en_accel/ktls.h index eb692feba4a6..929966e6fbc4 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/en_accel/ktls.h +++ b/drivers/net/ethernet/mellanox/mlx5/core/en_accel/ktls.h @@ -94,7 +94,16 @@ struct sk_buff *mlx5e_ktls_handle_tx_skb(struct net_device *netdev, void mlx5e_ktls_tx_handle_resync_dump_comp(struct mlx5e_txqsq *sq, struct mlx5e_tx_wqe_info *wi, u32 *dma_fifo_cc); - +static inline u8 +mlx5e_ktls_dumps_num_wqebbs(struct mlx5e_txqsq *sq, unsigned int nfrags, + unsigned int sync_len) +{ + /* Given the MTU and sync_len, calculates an upper bound for the + * number of WQEBBs needed for the TX resync DUMP WQEs of a record. + */ + return MLX5E_KTLS_DUMP_WQEBBS * + (nfrags + DIV_ROUND_UP(sync_len, sq->hw_mtu)); +} #else static inline void mlx5e_ktls_build_netdev(struct mlx5e_priv *priv) |