Re: [dpdk-dev] [PATCH v2 1/1] net/e1000: igbvf VLAN offload implementation

["Wang, Haiyue" <haiyue.wang@intel.com>]

> -----Original Message-----
> From: Renata Saiakhova <Renata.Saiakhova@ekinops.com>
> Sent: Wednesday, September 15, 2021 22:52
> To: Wang, Haiyue <haiyue.wang@intel.com>
> Cc: dev@dpdk.org; Renata Saiakhova <Renata.Saiakhova@ekinops.com>
> Subject: [PATCH v2 1/1] net/e1000: igbvf VLAN offload implementation
> 
> igbvf_vlan_offload_config and igbvf_vlan_offload_set primal
> implementation, setting vlan filter mask at igbvf_dev_start time.
> Without the above a vlan filter for igbvf is not functional.
> 
> Signed-off-by: Renata Saiakhova <Renata.Saiakhova@ekinops.com>
> ---
>  drivers/net/e1000/igb_ethdev.c | 28 ++++++++++++++++++++++++++++
>  1 file changed, 28 insertions(+)
> 
> diff --git a/drivers/net/e1000/igb_ethdev.c b/drivers/net/e1000/igb_ethdev.c
> index 10ee0f3341..4c8478427c 100644
> --- a/drivers/net/e1000/igb_ethdev.c
> +++ b/drivers/net/e1000/igb_ethdev.c
> @@ -171,6 +171,8 @@ static int eth_igbvf_xstats_get_names(struct rte_eth_dev *dev,
>  static int eth_igbvf_stats_reset(struct rte_eth_dev *dev);
>  static int igbvf_vlan_filter_set(struct rte_eth_dev *dev,
>  		uint16_t vlan_id, int on);
> +static int igbvf_vlan_offload_config(struct rte_eth_dev *dev, int mask);
> +static int igbvf_vlan_offload_set(struct rte_eth_dev *dev, int mask);
>  static int igbvf_set_vfta(struct e1000_hw *hw, uint16_t vid, bool on);
>  static void igbvf_set_vfta_all(struct rte_eth_dev *dev, bool on);
>  static int igbvf_default_mac_addr_set(struct rte_eth_dev *dev,
> @@ -410,6 +412,7 @@ static const struct eth_dev_ops igbvf_eth_dev_ops = {
>  	.xstats_get_names     = eth_igbvf_xstats_get_names,
>  	.stats_reset          = eth_igbvf_stats_reset,
>  	.xstats_reset         = eth_igbvf_stats_reset,
> +	.vlan_offload_set     = igbvf_vlan_offload_set,
>  	.vlan_filter_set      = igbvf_vlan_filter_set,
>  	.dev_infos_get        = eth_igbvf_infos_get,
>  	.dev_supported_ptypes_get = eth_igb_supported_ptypes_get,
> @@ -3304,6 +3307,8 @@ igbvf_dev_start(struct rte_eth_dev *dev)
>  	struct rte_intr_handle *intr_handle = &pci_dev->intr_handle;
>  	int ret;
>  	uint32_t intr_vector = 0;
> +	int mask;
> +	int err;
> 
>  	PMD_INIT_FUNC_TRACE();
> 
> @@ -3313,6 +3318,14 @@ igbvf_dev_start(struct rte_eth_dev *dev)
>  	/* Set all vfta */
>  	igbvf_set_vfta_all(dev,1);
> 
> +	/* Set vlan filter mask */
> +	mask = ETH_VLAN_FILTER_MASK;
> +	err = igbvf_vlan_offload_config(dev, mask);
> +	if (err) {
> +		PMD_INIT_LOG(ERR, "Unable to set VLAN offload (%d)", err);
> +		return err;
> +	}

since igbvf_vlan_offload_config is dummy function, we no need to call
it here.

> +
>  	eth_igbvf_tx_init(dev);
> 
>  	/* This can fail when allocating mbufs for descriptor rings */
> @@ -3531,6 +3544,21 @@ static void igbvf_set_vfta_all(struct rte_eth_dev *dev, bool on)
> 
>  }
> 
> +static int
> +igbvf_vlan_offload_config(__rte_unused struct rte_eth_dev *dev, int mask)
> +{
> +	if (mask & ETH_VLAN_STRIP_MASK)
> +		return -ENOTSUP;
> +	return 0;
> +}
> +
> +static int
> +igbvf_vlan_offload_set(struct rte_eth_dev *dev, int mask)
> +{
> +	igbvf_vlan_offload_config(dev, mask);
> +	return 0;
> +}

I think we can simplify it to just implement the missed VLAN offload
ops, it will make the VLAN filter by ID to work.

BTW, the API 'rte_eth_dev_set_vlan_offload' will check the mask vs
capabilities, so we can just always "return 0", that means a dummy
function for VF.

static int
eth_igbvf_vlan_offload_set(__rte_unused struct rte_eth_dev *dev,
				   __rte_unused int mask)
{
	return 0;
}

> +
>  static int
>  igbvf_vlan_filter_set(struct rte_eth_dev *dev, uint16_t vlan_id, int on)
>  {
> --
> 2.17.2