Re: [dpdk-dev] [PATCH v2] net/iavf: fix PF returning error

["Xing, Beilei" <beilei.xing@intel.com>]

> -----Original Message-----
> From: Zhang, AlvinX <alvinx.zhang@intel.com>
> Sent: Sunday, April 25, 2021 3:40 PM
> To: Wu, Jingjing <jingjing.wu@intel.com>; Xing, Beilei <beilei.xing@intel.com>
> Cc: dev@dpdk.org; Zhang, AlvinX <alvinx.zhang@intel.com>; stable@dpdk.org
> Subject: [PATCH v2] net/iavf: fix PF returning error
> 
> When the command sent by VF to PF fails, iavf may need to run different code
> paths according to the specific reason of the failure (not supported or other
> reasons).
> 
> This patch adds support of identifying PF return error type.
> 
> Fixes: 22b123a36d07 ("net/avf: initialize PMD")
> Cc: stable@dpdk.org
> 
> Signed-off-by: Alvin Zhang <alvinx.zhang@intel.com>
> ---
> 
> v2: Refine codes according to comments.
> ---
>  drivers/net/iavf/iavf.h       |  4 ++--
>  drivers/net/iavf/iavf_vchnl.c | 18 ++++++++++++------
>  2 files changed, 14 insertions(+), 8 deletions(-)
> 
> diff --git a/drivers/net/iavf/iavf.h b/drivers/net/iavf/iavf.h index
> d1ae5a3..4a2e203 100644
> --- a/drivers/net/iavf/iavf.h
> +++ b/drivers/net/iavf/iavf.h
> @@ -144,7 +144,7 @@ struct iavf_info {
>  	uint64_t supported_rxdid;
>  	uint8_t *proto_xtr; /* proto xtr type for all queues */
>  	volatile enum virtchnl_ops pend_cmd; /* pending command not
> finished */
> -	uint32_t cmd_retval; /* return value of the cmd response from PF */
> +	int cmd_retval; /* return value of the cmd response from PF */
>  	uint8_t *aq_resp; /* buffer to store the adminq response from PF */
> 
>  	/* Event from pf */
> @@ -264,7 +264,7 @@ struct iavf_cmd_info {
>   * _atomic_set_cmd successfully.
>   */
>  static inline void
> -_notify_cmd(struct iavf_info *vf, uint32_t msg_ret)
> +_notify_cmd(struct iavf_info *vf, int msg_ret)
>  {
>  	vf->cmd_retval = msg_ret;
>  	rte_wmb();
> diff --git a/drivers/net/iavf/iavf_vchnl.c b/drivers/net/iavf/iavf_vchnl.c index
> 45096cb..f2b46f1 100644
> --- a/drivers/net/iavf/iavf_vchnl.c
> +++ b/drivers/net/iavf/iavf_vchnl.c
> @@ -228,13 +228,19 @@
>  			rte_delay_ms(ASQ_DELAY_MS);
>  			/* If don't read msg or read sys event, continue */
>  		} while (i++ < MAX_TRY_TIMES);
> -		/* If there's no response is received, clear command */
> -		if (i >= MAX_TRY_TIMES  ||
> -		    vf->cmd_retval != VIRTCHNL_STATUS_SUCCESS) {
> -			err = -1;
> -			PMD_DRV_LOG(ERR, "No response or return failure
> (%d)"
> -				    " for cmd %d", vf->cmd_retval, args->ops);
> +
> +		if (i >= MAX_TRY_TIMES) {
> +			PMD_DRV_LOG(ERR, "No response for cmd %d", args-
> >ops);
>  			_clear_cmd(vf);
> +			err = -EIO;
> +		} else if (vf->cmd_retval ==
> +			   VIRTCHNL_STATUS_ERR_NOT_SUPPORTED) {
> +			PMD_DRV_LOG(ERR, "Cmd %d not supported", args-
> >ops);
> +			err = -ENOTSUP;
> +		} else if (vf->cmd_retval != VIRTCHNL_STATUS_SUCCESS) {
> +			PMD_DRV_LOG(ERR, "Return failure %d for cmd %d",
> +				    vf->cmd_retval, args->ops);
> +			err = -EINVAL;
>  		}
>  		break;
>  	}
> --
> 1.8.3.1

Acked-by: Beilei Xing <beilei.xing@intel.com>