[PATCH v2 0/1] net/mlx5: fix incorrect rx/tx descriptor limitations in rte_eth_dev_info

[Igor Gutorov <igootorov@gmail.com>]

Hi, Slava

> 1. The absolute max descriptor number supported by ConnectX hardware is 32768.
> 2. The actual max descriptor number supported by the port (and its related representors)
>     reported in log_max_wq_sz in HCA.caps.  This value should be queried and save in mlx5_devx_cmd_query_hca_attr() routine.
> 3. mlx5_rx_queue_pre_setup() should check requested descriptor number and reject if it exceeds log_max_wq_sz

Thank you for the guidelines! I've also added the same check to mlx5_tx_queue_pre_setup(),
I'm assuming log_max_wq_sz can be used for both RX and TX.

Is an `int` appropriate for `log_max_wq_sz`? Seems like a `uint8_t` is sufficient, but I've left it
an `int` for consistency with the other `log_max_*` values.

Also, I've noticed a similar issue with MTU, it is also reported as 65535 in
`rte_eth_dev_info.max_mtu`. I'd like to send a separate patch to fix that too. What's
the procedure for reading max supported MTU?

> 4. Please, format your patch according to the "fix" template.

I've reworded the commit message a little bit. But I don't see these issues on Bugzilla, I've
stumbled upon them independently. If you'd like the bug reports to be created, let me know.

Sincerely,
Igor

Igor Gutorov (1):
  net/mlx5: fix incorrect rx/tx descriptor limitations in
    rte_eth_dev_info

 drivers/common/mlx5/mlx5_devx_cmds.c | 1 +
 drivers/common/mlx5/mlx5_devx_cmds.h | 1 +
 drivers/net/mlx5/mlx5_ethdev.c       | 4 ++++
 drivers/net/mlx5/mlx5_rxq.c          | 8 ++++++++
 drivers/net/mlx5/mlx5_txq.c          | 8 ++++++++
 5 files changed, 22 insertions(+)

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2.45.2