net/mlx5e: Introduce extended version for mlx5e_xmit_data

Introduce struct mlx5e_xmit_data_frags to be used for non-linear xmit
buffers. Let it include sinfo pointer.

Take one bit from the len field to indicate if the descriptor has
fragments and can be casted-up into the extended version.

Zero-init to make sure has_frags, and potentially future fields, are
zero when not explicitly assigned.

Another field will be added in a downstream patch to indicate and point
to dma addresses of the different frags, for redirect-in requests.

This simplifies the mlx5e_xmit_xdp_frame/mlx5e_xmit_xdp_frame_mpwqe
functions params.

Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 7 insertions, 1 deletions

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en/txrx.h b/drivers/net/ethernet/mellanox/mlx5/core/en/txrx.h
index 6f7ebedda279..1302f52db883 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en/txrx.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en/txrx.h
@@ -80,7 +80,13 @@ static inline bool mlx5e_rx_hw_stamp(struct hwtstamp_config *config)
 struct mlx5e_xmit_data {
 	dma_addr_t  dma_addr;
 	void       *data;
-	u32         len;
+	u32         len : 31;
+	u32         has_frags : 1;
+};
+
+struct mlx5e_xmit_data_frags {
+	struct mlx5e_xmit_data xd;
+	struct skb_shared_info *sinfo;
 };
 
 netdev_tx_t mlx5e_xmit(struct sk_buff *skb, struct net_device *dev);