Hi,
Adding all mlx5 maintainers.
On Tue, Mar 25, 2025 at 06:39:00PM +0800, Wenbo Liu wrote:
> Test Environment: ARM architecture, OpenEuler operating system
> CPU: HUAWEI Kunpeng 920 5220, BIOS Vendor ID: HiSilicon
> Network Card: Mellanox Technologies MT27800 Family [ConnectX-5]
> DPDK program sending self-encapsulated packets with MAC, IP, and UDP headers
> continuously prints the following errors and ceases packet transmission
>
> mlx5_common: Failed to modify SQ using DevX
> mlx5_net: Cannot change the Tx SQ state to RESET Remote I/O error
>
> Signed-off-by: Wenbo Liu <liuwenbo...@gmail.com>
> ---
> drivers/net/mlx5/mlx5_tx.c | 6 +++++-
> 1 file changed, 5 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/net/mlx5/mlx5_tx.c b/drivers/net/mlx5/mlx5_tx.c
> index 4286876..5cf9873 100644
> --- a/drivers/net/mlx5/mlx5_tx.c
> +++ b/drivers/net/mlx5/mlx5_tx.c
> @@ -186,6 +186,7 @@
> volatile struct mlx5_cqe *last_cqe = NULL;
> bool ring_doorbell = false;
> int ret;
> + int offset = 0;
>
> do {
> volatile struct mlx5_cqe *cqe;
> @@ -205,8 +206,11 @@
> * here, before we might perform SQ reset.
> */
> rte_wmb();
> +#if (RTE_CACHE_LINE_SIZE == 128)
> + offset = 64;
> +#endif
> ret = mlx5_tx_error_cqe_handle
> - (txq, (volatile struct mlx5_error_cqe *)cqe);
> + (txq, (volatile struct mlx5_err_cqe *)(((char
> *)cqe) + offset));
Could you please elaborate what exactly that changes?
I think I'm missing something.
mlx5_error_cqe, used here originally, takes into account the
possibility of cache line being 128B
(https://github.com/DPDK/dpdk/blob/main/drivers/common/mlx5/mlx5_prm.h#L427)
and this achieves the equivalent to the above diff.
> if (unlikely(ret < 0)) {
> /*
> * Some error occurred on queue error
> --
> 1.8.3.1
>
Best regards,
Dariusz Sosnowski
