netdev - [net-next 13/13] net/mlx5e: Enhance ICOSQ WQE info fields

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Date:   Sat,  9 May 2020 01:28:56 -0700
From:   Saeed Mahameed <saeedm@...lanox.com>
To:     "David S. Miller" <davem@...emloft.net>, kuba@...nel.org
Cc:     netdev@...r.kernel.org, Tariq Toukan <tariqt@...lanox.com>,
        Maxim Mikityanskiy <maximmi@...lanox.com>,
        Saeed Mahameed <saeedm@...lanox.com>
Subject: [net-next 13/13] net/mlx5e: Enhance ICOSQ WQE info fields

From: Tariq Toukan <tariqt@...lanox.com>

The same WQE opcode might be used in different ICOSQ flows
and WQE types.
To have a better distinguishability, replace it with an enum that
better indicates the WQE type and flow it is used for.

Signed-off-by: Tariq Toukan <tariqt@...lanox.com>
Reviewed-by: Maxim Mikityanskiy <maximmi@...lanox.com>
Signed-off-by: Saeed Mahameed <saeedm@...lanox.com>
---
 .../net/ethernet/mellanox/mlx5/core/en/txrx.h   | 11 ++++++++---
 drivers/net/ethernet/mellanox/mlx5/core/en_rx.c | 17 ++++++++++-------
 .../net/ethernet/mellanox/mlx5/core/en_txrx.c   |  2 +-
 3 files changed, 19 insertions(+), 11 deletions(-)

diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en/txrx.h b/drivers/net/ethernet/mellanox/mlx5/core/en/txrx.h
index 9e150d160cde..dce2bbbf9109 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en/txrx.h
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en/txrx.h
@@ -27,6 +27,11 @@
 
 #define INL_HDR_START_SZ (sizeof(((struct mlx5_wqe_eth_seg *)NULL)->inline_hdr.start))
 
+enum mlx5e_icosq_wqe_type {
+	MLX5E_ICOSQ_WQE_NOP,
+	MLX5E_ICOSQ_WQE_UMR_RX,
+};
+
 static inline bool
 mlx5e_wqc_has_room_for(struct mlx5_wq_cyc *wq, u16 cc, u16 pc, u16 n)
 {
@@ -120,10 +125,10 @@ static inline u16 mlx5e_txqsq_get_next_pi(struct mlx5e_txqsq *sq, u16 size)
 }
 
 struct mlx5e_icosq_wqe_info {
-	u8 opcode;
+	u8 wqe_type;
 	u8 num_wqebbs;
 
-	/* Auxiliary data for different opcodes. */
+	/* Auxiliary data for different wqe types. */
 	union {
 		struct {
 			struct mlx5e_rq *rq;
@@ -147,7 +152,7 @@ static inline u16 mlx5e_icosq_get_next_pi(struct mlx5e_icosq *sq, u16 size)
 		/* Fill SQ frag edge with NOPs to avoid WQE wrapping two pages. */
 		for (; wi < edge_wi; wi++) {
 			*wi = (struct mlx5e_icosq_wqe_info) {
-				.opcode = MLX5_OPCODE_NOP,
+				.wqe_type   = MLX5E_ICOSQ_WQE_NOP,
 				.num_wqebbs = 1,
 			};
 			mlx5e_post_nop(wq, sq->sqn, &sq->pc);
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_rx.c b/drivers/net/ethernet/mellanox/mlx5/core/en_rx.c
index 8142b6e70857..779600bebcca 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_rx.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_rx.c
@@ -506,7 +506,7 @@ static int mlx5e_alloc_rx_mpwqe(struct mlx5e_rq *rq, u16 ix)
 	umr_wqe->uctrl.xlt_offset = cpu_to_be16(xlt_offset);
 
 	sq->db.wqe_info[pi] = (struct mlx5e_icosq_wqe_info) {
-		.opcode     = MLX5_OPCODE_UMR,
+		.wqe_type   = MLX5E_ICOSQ_WQE_UMR_RX,
 		.num_wqebbs = MLX5E_UMR_WQEBBS,
 		.umr.rq     = rq,
 	};
@@ -619,15 +619,18 @@ int mlx5e_poll_ico_cq(struct mlx5e_cq *cq)
 				break;
 			}
 
-			if (likely(wi->opcode == MLX5_OPCODE_UMR))
+			switch (wi->wqe_type) {
+			case MLX5E_ICOSQ_WQE_UMR_RX:
 				wi->umr.rq->mpwqe.umr_completed++;
-			else if (unlikely(wi->opcode != MLX5_OPCODE_NOP))
+				break;
+			case MLX5E_ICOSQ_WQE_NOP:
+				break;
+			default:
 				netdev_WARN_ONCE(cq->channel->netdev,
-						 "Bad OPCODE in ICOSQ WQE info: 0x%x\n",
-						 wi->opcode);
-
+						 "Bad WQE type in ICOSQ WQE info: 0x%x\n",
+						 wi->wqe_type);
+			}
 		} while (!last_wqe);
-
 	} while ((++i < MLX5E_TX_CQ_POLL_BUDGET) && (cqe = mlx5_cqwq_get_cqe(&cq->wq)));
 
 	sq->cc = sqcc;
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en_txrx.c b/drivers/net/ethernet/mellanox/mlx5/core/en_txrx.c
index 73293f9c3f63..8480278f2ee2 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/en_txrx.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/en_txrx.c
@@ -79,7 +79,7 @@ void mlx5e_trigger_irq(struct mlx5e_icosq *sq)
 	u16 pi = mlx5_wq_cyc_ctr2ix(wq, sq->pc);
 
 	sq->db.wqe_info[pi] = (struct mlx5e_icosq_wqe_info) {
-		.opcode     = MLX5_OPCODE_NOP,
+		.wqe_type   = MLX5E_ICOSQ_WQE_NOP,
 		.num_wqebbs = 1,
 	};
 
-- 
2.25.4