Re: [dpdk-dev] [RFC PATCH v4 3/3] app/testpmd: handle device recovery event

[Ophir Munk <ophirmu@nvidia.com>]

Hi Kalesh,
Please find a few comments.
The name you gave to the event (EVENT_RESET) is very close to an already existing one: "EVENT_INTR_RESET".
But they are different.
EVENT_INTR_RESET originates from a port reset. It requires application reaction. It is widely used. It is documented in *.rst files.
EVENT_RESET originates from FW error (or maybe any error). It requires no application reaction (PMD manages by itself). It is not documented.
I therefore suggest renaming it (maybe EVENT_ERR_RECOVERING) and please document it in *.rst files.
More comments below:

> -----Original Message-----
> From: dev <dev-bounces@dpdk.org> On Behalf Of Kalesh A P
> Sent: Wednesday, September 30, 2020 3:33 PM
> To: dev@dpdk.org
> Subject: [dpdk-dev] [RFC PATCH v4 3/3] app/testpmd: handle device recovery
> event
> 
> From: Kalesh AP <kalesh-anakkur.purayil@broadcom.com>
> 
> Added code to handle device reset and recovery event in testpmd.
> This is an indication from the PMD that device has reset and recovered error
> condition.
> 
> Signed-off-by: Kalesh AP <kalesh-anakkur.purayil@broadcom.com>
> Reviewed-by: Ajit Kumar Khaparde <ajit.khaparde@broadcom.com>
> ---
>  app/test-pmd/testpmd.c | 6 +++++-
>  1 file changed, 5 insertions(+), 1 deletion(-)
> 
> diff --git a/app/test-pmd/testpmd.c b/app/test-pmd/testpmd.c index
> fe6450c..1c8fb46 100644
> --- a/app/test-pmd/testpmd.c
> +++ b/app/test-pmd/testpmd.c
> @@ -380,6 +380,8 @@ static const char * const eth_event_desc[] = {
>  	[RTE_ETH_EVENT_NEW] = "device probed",
>  	[RTE_ETH_EVENT_DESTROY] = "device released",
>  	[RTE_ETH_EVENT_FLOW_AGED] = "flow aged",
> +	[RTE_ETH_EVENT_RESET] = "device reset",

"device reset" is similar to the existing "reset" string. Can you suggest a different one? Maybe "error under recovery" ?

> +	[RTE_ETH_EVENT_RECOVERED] = "device recovery",

Wouldn't you prefer "device recovered" ?

>  	[RTE_ETH_EVENT_MAX] = NULL,
>  };
> 
> @@ -394,7 +396,9 @@ uint32_t event_print_mask = (UINT32_C(1) <<
> RTE_ETH_EVENT_UNKNOWN) |
>  			    (UINT32_C(1) << RTE_ETH_EVENT_IPSEC) |
>  			    (UINT32_C(1) << RTE_ETH_EVENT_MACSEC) |
>  			    (UINT32_C(1) << RTE_ETH_EVENT_INTR_RMV) |
> -			    (UINT32_C(1) << RTE_ETH_EVENT_FLOW_AGED);
> +			    (UINT32_C(1) << RTE_ETH_EVENT_FLOW_AGED) |
> +			    (UINT32_C(1) << RTE_ETH_EVENT_RESET) |
> +			    (UINT32_C(1) << RTE_ETH_EVENT_RECOVERED);
>  /*
>   * Decide if all memory are locked for performance.
>   */
> --
> 2.10.1