1 files changed, 87 insertions, 43 deletions

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_rx.c b/drivers/net/ethernet/mellanox/mlx5/core/en_rx.c
index c3b3002ff62f..13133e7f088e 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_rx.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_rx.c
@@ -409,14 +409,15 @@ mlx5e_free_rx_mpwqe(struct mlx5e_rq *rq, struct mlx5e_mpw_info *wi, bool recycle
 			mlx5e_page_release(rq, &dma_info[i], recycle);
 }
 
-static void mlx5e_post_rx_mpwqe(struct mlx5e_rq *rq)
+static void mlx5e_post_rx_mpwqe(struct mlx5e_rq *rq, u8 n)
 {
 	struct mlx5_wq_ll *wq = &rq->mpwqe.wq;
-	struct mlx5e_rx_wqe_ll *wqe = mlx5_wq_ll_get_wqe(wq, wq->head);
 
-	rq->mpwqe.umr_in_progress = false;
+	do {
+		u16 next_wqe_index = mlx5_wq_ll_get_wqe_next_ix(wq, wq->head);
 
-	mlx5_wq_ll_push(wq, be16_to_cpu(wqe->next.next_wqe_index));
+		mlx5_wq_ll_push(wq, next_wqe_index);
+	} while (--n);
 
 	/* ensure wqes are visible to device before updating doorbell record */
 	dma_wmb();
@@ -426,7 +427,7 @@ static void mlx5e_post_rx_mpwqe(struct mlx5e_rq *rq)
 
 static inline u16 mlx5e_icosq_wrap_cnt(struct mlx5e_icosq *sq)
 {
-	return sq->pc >> MLX5E_PARAMS_MINIMUM_LOG_SQ_SIZE;
+	return mlx5_wq_cyc_get_ctr_wrap_cnt(&sq->wq, sq->pc);
 }
 
 static inline void mlx5e_fill_icosq_frag_edge(struct mlx5e_icosq *sq,
@@ -478,8 +479,6 @@ static int mlx5e_alloc_rx_mpwqe(struct mlx5e_rq *rq, u16 ix)
 	bitmap_zero(wi->xdp_xmit_bitmap, MLX5_MPWRQ_PAGES_PER_WQE);
 	wi->consumed_strides = 0;
 
-	rq->mpwqe.umr_in_progress = true;
-
 	umr_wqe->ctrl.opmod_idx_opcode =
 		cpu_to_be32((sq->pc << MLX5_WQE_CTRL_WQE_INDEX_SHIFT) |
 			    MLX5_OPCODE_UMR);
@@ -487,7 +486,8 @@ static int mlx5e_alloc_rx_mpwqe(struct mlx5e_rq *rq, u16 ix)
 
 	sq->db.ico_wqe[pi].opcode = MLX5_OPCODE_UMR;
 	sq->pc += MLX5E_UMR_WQEBBS;
-	mlx5e_notify_hw(wq, sq->pc, sq->uar_map, &umr_wqe->ctrl);
+
+	sq->doorbell_cseg = &umr_wqe->ctrl;
 
 	return 0;
 
@@ -542,37 +542,13 @@ bool mlx5e_post_rx_wqes(struct mlx5e_rq *rq)
 	return !!err;
 }
 
-static inline void mlx5e_poll_ico_single_cqe(struct mlx5e_cq *cq,
-					     struct mlx5e_icosq *sq,
-					     struct mlx5e_rq *rq,
-					     struct mlx5_cqe64 *cqe)
-{
-	struct mlx5_wq_cyc *wq = &sq->wq;
-	u16 ci = mlx5_wq_cyc_ctr2ix(wq, be16_to_cpu(cqe->wqe_counter));
-	struct mlx5e_sq_wqe_info *icowi = &sq->db.ico_wqe[ci];
-
-	mlx5_cqwq_pop(&cq->wq);
-
-	if (unlikely(get_cqe_opcode(cqe) != MLX5_CQE_REQ)) {
-		netdev_WARN_ONCE(cq->channel->netdev,
-				 "Bad OP in ICOSQ CQE: 0x%x\n", get_cqe_opcode(cqe));
-		return;
-	}
-
-	if (likely(icowi->opcode == MLX5_OPCODE_UMR)) {
-		mlx5e_post_rx_mpwqe(rq);
-		return;
-	}
-
-	if (unlikely(icowi->opcode != MLX5_OPCODE_NOP))
-		netdev_WARN_ONCE(cq->channel->netdev,
-				 "Bad OPCODE in ICOSQ WQE info: 0x%x\n", icowi->opcode);
-}
-
 static void mlx5e_poll_ico_cq(struct mlx5e_cq *cq, struct mlx5e_rq *rq)
 {
 	struct mlx5e_icosq *sq = container_of(cq, struct mlx5e_icosq, cq);
 	struct mlx5_cqe64 *cqe;
+	u8  completed_umr = 0;
+	u16 sqcc;
+	int i;
 
 	if (unlikely(!test_bit(MLX5E_SQ_STATE_ENABLED, &sq->state)))
 		return;
@@ -581,28 +557,96 @@ static void mlx5e_poll_ico_cq(struct mlx5e_cq *cq, struct mlx5e_rq *rq)
 	if (likely(!cqe))
 		return;
 
-	/* by design, there's only a single cqe */
-	mlx5e_poll_ico_single_cqe(cq, sq, rq, cqe);
+	/* sq->cc must be updated only after mlx5_cqwq_update_db_record(),
+	 * otherwise a cq overrun may occur
+	 */
+	sqcc = sq->cc;
+
+	i = 0;
+	do {
+		u16 wqe_counter;
+		bool last_wqe;
+
+		mlx5_cqwq_pop(&cq->wq);
+
+		wqe_counter = be16_to_cpu(cqe->wqe_counter);
+
+		if (unlikely(get_cqe_opcode(cqe) != MLX5_CQE_REQ)) {
+			netdev_WARN_ONCE(cq->channel->netdev,
+					 "Bad OP in ICOSQ CQE: 0x%x\n", get_cqe_opcode(cqe));
+			break;
+		}
+		do {
+			struct mlx5e_sq_wqe_info *wi;
+			u16 ci;
+
+			last_wqe = (sqcc == wqe_counter);
+
+			ci = mlx5_wq_cyc_ctr2ix(&sq->wq, sqcc);
+			wi = &sq->db.ico_wqe[ci];
+
+			if (likely(wi->opcode == MLX5_OPCODE_UMR)) {
+				sqcc += MLX5E_UMR_WQEBBS;
+				completed_umr++;
+			} else if (likely(wi->opcode == MLX5_OPCODE_NOP)) {
+				sqcc++;
+			} else {
+				netdev_WARN_ONCE(cq->channel->netdev,
+						 "Bad OPCODE in ICOSQ WQE info: 0x%x\n",
+						 wi->opcode);
+			}
+
+		} while (!last_wqe);
+
+	} while ((++i < MLX5E_TX_CQ_POLL_BUDGET) && (cqe = mlx5_cqwq_get_cqe(&cq->wq)));
+
+	sq->cc = sqcc;
 
 	mlx5_cqwq_update_db_record(&cq->wq);
+
+	if (likely(completed_umr)) {
+		mlx5e_post_rx_mpwqe(rq, completed_umr);
+		rq->mpwqe.umr_in_progress -= completed_umr;
+	}
 }
 
 bool mlx5e_post_rx_mpwqes(struct mlx5e_rq *rq)
 {
+	struct mlx5e_icosq *sq = &rq->channel->icosq;
 	struct mlx5_wq_ll *wq = &rq->mpwqe.wq;
+	u8  missing, i;
+	u16 head;
 
 	if (unlikely(!test_bit(MLX5E_RQ_STATE_ENABLED, &rq->state)))
 		return false;
 
-	mlx5e_poll_ico_cq(&rq->channel->icosq.cq, rq);
+	mlx5e_poll_ico_cq(&sq->cq, rq);
+
+	missing = mlx5_wq_ll_missing(wq) - rq->mpwqe.umr_in_progress;
 
-	if (mlx5_wq_ll_is_full(wq))
+	if (unlikely(rq->mpwqe.umr_in_progress > rq->mpwqe.umr_last_bulk))
+		rq->stats->congst_umr++;
+
+#define UMR_WQE_BULK (2)
+	if (likely(missing < UMR_WQE_BULK))
 		return false;
 
-	if (!rq->mpwqe.umr_in_progress)
-		mlx5e_alloc_rx_mpwqe(rq, wq->head);
-	else
-		rq->stats->congst_umr += mlx5_wq_ll_missing(wq) > 2;
+	head = rq->mpwqe.actual_wq_head;
+	i = missing;
+	do {
+		if (unlikely(mlx5e_alloc_rx_mpwqe(rq, head)))
+			break;
+		head = mlx5_wq_ll_get_wqe_next_ix(wq, head);
+	} while (--i);
+
+	rq->mpwqe.umr_last_bulk    = missing - i;
+	if (sq->doorbell_cseg) {
+		mlx5e_notify_hw(&sq->wq, sq->pc, sq->uar_map, sq->doorbell_cseg);
+		sq->doorbell_cseg = NULL;
+	}
+
+	rq->mpwqe.umr_in_progress += rq->mpwqe.umr_last_bulk;
+	rq->mpwqe.actual_wq_head   = head;
 
 	return false;
 }