net/mlx5e: Move XDP completion functions to rx file

XDP code belongs to RX path, move mlx5e_poll_xdp_tx_cq and
mlx5e_free_xdp_tx_descs to en_rx.c.

Rename them to mlx5e_poll_xdpsq_cq and mlx5e_free_xdpsq_descs.

Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Reviewed-by: Tariq Toukan <tariqt@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 82 insertions, 0 deletions

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_rx.c b/drivers/net/ethernet/mellanox/mlx5/core/en_rx.c
index 873b3085756c..bc74d6032a5c 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_rx.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_rx.c
@@ -989,3 +989,85 @@ int mlx5e_poll_rx_cq(struct mlx5e_cq *cq, int budget)
 
 	return work_done;
 }
+
+bool mlx5e_poll_xdpsq_cq(struct mlx5e_cq *cq)
+{
+	struct mlx5e_sq *sq;
+	u16 sqcc;
+	int i;
+
+	sq = container_of(cq, struct mlx5e_sq, cq);
+
+	if (unlikely(!test_bit(MLX5E_SQ_STATE_ENABLED, &sq->state)))
+		return false;
+
+	/* sq->cc must be updated only after mlx5_cqwq_update_db_record(),
+	 * otherwise a cq overrun may occur
+	 */
+	sqcc = sq->cc;
+
+	for (i = 0; i < MLX5E_TX_CQ_POLL_BUDGET; i++) {
+		struct mlx5_cqe64 *cqe;
+		u16 wqe_counter;
+		bool last_wqe;
+
+		cqe = mlx5e_get_cqe(cq);
+		if (!cqe)
+			break;
+
+		mlx5_cqwq_pop(&cq->wq);
+
+		wqe_counter = be16_to_cpu(cqe->wqe_counter);
+
+		do {
+			struct mlx5e_sq_wqe_info *wi;
+			struct mlx5e_dma_info *di;
+			u16 ci;
+
+			last_wqe = (sqcc == wqe_counter);
+
+			ci = sqcc & sq->wq.sz_m1;
+			di = &sq->db.xdp.di[ci];
+			wi = &sq->db.xdp.wqe_info[ci];
+
+			if (unlikely(wi->opcode == MLX5_OPCODE_NOP)) {
+				sqcc++;
+				continue;
+			}
+
+			sqcc += wi->num_wqebbs;
+			/* Recycle RX page */
+			mlx5e_page_release(&sq->channel->rq, di, true);
+		} while (!last_wqe);
+	}
+
+	mlx5_cqwq_update_db_record(&cq->wq);
+
+	/* ensure cq space is freed before enabling more cqes */
+	wmb();
+
+	sq->cc = sqcc;
+	return (i == MLX5E_TX_CQ_POLL_BUDGET);
+}
+
+void mlx5e_free_xdpsq_descs(struct mlx5e_sq *sq)
+{
+	struct mlx5e_sq_wqe_info *wi;
+	struct mlx5e_dma_info *di;
+	u16 ci;
+
+	while (sq->cc != sq->pc) {
+		ci = sq->cc & sq->wq.sz_m1;
+		di = &sq->db.xdp.di[ci];
+		wi = &sq->db.xdp.wqe_info[ci];
+
+		if (wi->opcode == MLX5_OPCODE_NOP) {
+			sq->cc++;
+			continue;
+		}
+
+		sq->cc += wi->num_wqebbs;
+
+		mlx5e_page_release(&sq->channel->rq, di, false);
+	}
+}