[dpdk-dev] [PATCH] net/mlx5: extend debug logs verbosity

[Shahaf Shuler <shahafs@mellanox.com>]

Extend debug logs verbosity by printing the full completion with error
along with the entire txq in case of error. For the Rx case no logs were
added since such errors are counted and recovered by the Rx data path.

Such prints are essential to understand the root cause for the error.

Signed-off-by: Shahaf Shuler <shahafs@mellanox.com>
Signed-off-by: Xueming Li <xuemingl@mellanox.com>
---

This patch should be applied only after the series:
http://dpdk.org/dev/patchwork/patch/27367/

---
 drivers/net/mlx5/mlx5_rxtx.h | 20 +++++++++++++++++---
 1 file changed, 17 insertions(+), 3 deletions(-)

diff --git a/drivers/net/mlx5/mlx5_rxtx.h b/drivers/net/mlx5/mlx5_rxtx.h
index 7de1d1086..43debb309 100644
--- a/drivers/net/mlx5/mlx5_rxtx.h
+++ b/drivers/net/mlx5/mlx5_rxtx.h
@@ -55,6 +55,7 @@
 #include <rte_mbuf.h>
 #include <rte_mempool.h>
 #include <rte_common.h>
+#include <rte_hexdump.h>
 #ifdef PEDANTIC
 #pragma GCC diagnostic error "-Wpedantic"
 #endif
@@ -419,16 +420,24 @@ check_cqe(volatile struct mlx5_cqe *cqe,
 		if ((syndrome == MLX5_CQE_SYNDROME_LOCAL_LENGTH_ERR) ||
 		    (syndrome == MLX5_CQE_SYNDROME_REMOTE_ABORTED_ERR))
 			return 0;
-		if (!check_cqe_seen(cqe))
+		if (!check_cqe_seen(cqe)) {
 			ERROR("unexpected CQE error %u (0x%02x)"
 			      " syndrome 0x%02x",
 			      op_code, op_code, syndrome);
+			rte_hexdump(stderr, "MLX5 Error CQE:",
+				    (const void *)((uintptr_t)err_cqe),
+				    sizeof(*err_cqe));
+		}
 		return 1;
 	} else if ((op_code != MLX5_CQE_RESP_SEND) &&
 		   (op_code != MLX5_CQE_REQ)) {
-		if (!check_cqe_seen(cqe))
+		if (!check_cqe_seen(cqe)) {
 			ERROR("unexpected CQE opcode %u (0x%02x)",
 			      op_code, op_code);
+			rte_hexdump(stderr, "MLX5 CQE:",
+				    (const void *)((uintptr_t)cqe),
+				    sizeof(*cqe));
+		}
 		return 1;
 	}
 #endif /* NDEBUG */
@@ -483,8 +492,13 @@ mlx5_tx_complete(struct txq *txq)
 #ifndef NDEBUG
 	if ((MLX5_CQE_OPCODE(cqe->op_own) == MLX5_CQE_RESP_ERR) ||
 	    (MLX5_CQE_OPCODE(cqe->op_own) == MLX5_CQE_REQ_ERR)) {
-		if (!check_cqe_seen(cqe))
+		if (!check_cqe_seen(cqe)) {
 			ERROR("unexpected error CQE, TX stopped");
+			rte_hexdump(stderr, "MLX5 TXQ:",
+				    (const void *)((uintptr_t)txq->wqes),
+				    ((1 << txq->wqe_n) *
+				     MLX5_WQE_SIZE));
+		}
 		return;
 	}
 #endif /* NDEBUG */
-- 
2.12.0