Re: [dpdk-dev] [PATCH v3 2/2] ethdev: fix VLAN offloads set if no relative capabilities

["Wei Hu (Xavier)" <xavier.huwei@huawei.com>]

Hi, Sachin Saxena


On 2020/6/22 13:10, Sachin Saxena (OSS) wrote:
>
> On 22-Jun-20 8:17 AM, Wei Hu (Xavier) wrote:
>> Currently, there is a potential problem that calling the API function
>> rte_eth_dev_set_vlan_offload to start VLAN hardware offloads which the
>> driver does not support. If the PMD driver does not support certain VLAN
>> hardware offloads and does not check for it, the hardware setting will
>> not change, but the VLAN offloads in dev->data->dev_conf.rxmode.offloads
>> will be turned on.
>>
>> It is supposed to check the hardware capabilities to decide whether the
>> relative callback needs to be called just like the behavior in the API
>> function named rte_eth_dev_configure. And it is also needed to cleanup
>> duplicated checks which are done in some PMDs. Also, note that it is
>> behaviour change for some PMDs which simply ignore (with 
>> error/warning log
>> message) unsupported VLAN offloads, but now it will fail.
>>
>> Fixes: a4996bd89c42 ("ethdev: new Rx/Tx offloads API")
>> Cc: stable@dpdk.org
>>
>> Signed-off-by: Chengchang Tang <tangchengchang@huawei.com>
>> Signed-off-by: Wei Hu (Xavier) <xavier.huwei@huawei.com>
>> Acked-by: Andrew Rybchenko <arybchenko@solarflare.com>
>> ---
>> v2 -> v3: Add __rte_unused to avoid unused parameter 'dev' and 'mask'
>>       warning.
>> v1 -> v2: cleanup duplicated checks which are done in some PMDs.
>> ---
>>   drivers/net/dpaa2/dpaa2_ethdev.c           |  5 -----
>>   drivers/net/enic/enic_ethdev.c             | 12 ------------
>>   drivers/net/fm10k/fm10k_ethdev.c           | 23 
>> ++---------------------
>>   drivers/net/hinic/hinic_pmd_ethdev.c       |  6 ------
>>   drivers/net/i40e/i40e_ethdev.c             |  5 -----
>>   drivers/net/nfp/nfp_net.c                  |  5 -----
>>   drivers/net/octeontx/octeontx_ethdev_ops.c | 10 ----------
>>   drivers/net/octeontx2/otx2_vlan.c          |  5 -----
>>   drivers/net/qede/qede_ethdev.c             |  3 ---
>>   lib/librte_ethdev/rte_ethdev.c             | 21 +++++++++++++++++++++
>>   10 files changed, 23 insertions(+), 72 deletions(-)
>>
>> diff --git a/drivers/net/dpaa2/dpaa2_ethdev.c 
>> b/drivers/net/dpaa2/dpaa2_ethdev.c
>> index 2f031ec..da5018f 100644
>> --- a/drivers/net/dpaa2/dpaa2_ethdev.c
>> +++ b/drivers/net/dpaa2/dpaa2_ethdev.c
>> @@ -169,11 +169,6 @@ dpaa2_vlan_offload_set(struct rte_eth_dev *dev, 
>> int mask)
>>               DPAA2_PMD_INFO("Unable to set vlan filter = %d", ret);
>>       }
>>   next_mask:
>
> The changes looks good but the label "next_mask" and its usage above 
> should also be deleted/replaced.
OK, I will delete "next_mask" and modify the function that when the offload
is not supported the function fail as below,
what do you think of it? Looking forward to your comment.

static int
dpaa2_vlan_offload_set(struct rte_eth_dev *dev, int mask)
{
     struct dpaa2_dev_priv *priv = dev->data->dev_private;
     struct fsl_mc_io *dpni = dev->process_private;
     int ret = 0;

     PMD_INIT_FUNC_TRACE();

     if (mask & ETH_VLAN_FILTER_MASK) {
         /* VLAN Filter not avaialble */
         if (!priv->max_vlan_filters) {
             DPAA2_PMD_INFO("VLAN filter not available");
             return -ENOTSUP;
         }

         if (dev->data->dev_conf.rxmode.offloads &
             DEV_RX_OFFLOAD_VLAN_FILTER)
             ret = dpni_enable_vlan_filter(dpni, CMD_PRI_LOW,
                               priv->token, true);
         else
             ret = dpni_enable_vlan_filter(dpni, CMD_PRI_LOW,
                               priv->token, false);
         if (ret < 0)
             DPAA2_PMD_INFO("Unable to set vlan filter = %d", ret);
     }

     return ret;
}

Thanks, Xavier
>
>
>> -    if (mask & ETH_VLAN_EXTEND_MASK) {
>> -        if (dev->data->dev_conf.rxmode.offloads &
>> -            DEV_RX_OFFLOAD_VLAN_EXTEND)
>> -            DPAA2_PMD_INFO("VLAN extend offload not supported");
>> -    }
>>         return 0;
>>   }
>> diff --git a/drivers/net/enic/enic_ethdev.c 
>> b/drivers/net/enic/enic_ethdev.c
>> index 32d5397..ef8900d 100644
>> --- a/drivers/net/enic/enic_ethdev.c
>> +++ b/drivers/net/enic/enic_ethdev.c
>> @@ -374,18 +374,6 @@ static int enicpmd_vlan_offload_set(struct 
>> rte_eth_dev *eth_dev, int mask)
>>               enic->ig_vlan_strip_en = 0;
>>       }
>>   -    if ((mask & ETH_VLAN_FILTER_MASK) &&
>> -        (offloads & DEV_RX_OFFLOAD_VLAN_FILTER)) {
>> -        dev_warning(enic,
>> -            "Configuration of VLAN filter is not supported\n");
>> -    }
>> -
>> -    if ((mask & ETH_VLAN_EXTEND_MASK) &&
>> -        (offloads & DEV_RX_OFFLOAD_VLAN_EXTEND)) {
>> -        dev_warning(enic,
>> -            "Configuration of extended VLAN is not supported\n");
>> -    }
>> -
>>       return enic_set_vlan_strip(enic);
>>   }
>>   diff --git a/drivers/net/fm10k/fm10k_ethdev.c 
>> b/drivers/net/fm10k/fm10k_ethdev.c
>> index f537ab2..f5b854e 100644
>> --- a/drivers/net/fm10k/fm10k_ethdev.c
>> +++ b/drivers/net/fm10k/fm10k_ethdev.c
>> @@ -1575,28 +1575,9 @@ fm10k_vlan_filter_set(struct rte_eth_dev *dev, 
>> uint16_t vlan_id, int on)
>>   }
>>     static int
>> -fm10k_vlan_offload_set(struct rte_eth_dev *dev, int mask)
>> +fm10k_vlan_offload_set(struct rte_eth_dev *dev __rte_unused,
>> +               int mask __rte_unused)
>>   {
>> -    if (mask & ETH_VLAN_STRIP_MASK) {
>> -        if (!(dev->data->dev_conf.rxmode.offloads &
>> -            DEV_RX_OFFLOAD_VLAN_STRIP))
>> -            PMD_INIT_LOG(ERR, "VLAN stripping is "
>> -                    "always on in fm10k");
>> -    }
>> -
>> -    if (mask & ETH_VLAN_EXTEND_MASK) {
>> -        if (dev->data->dev_conf.rxmode.offloads &
>> -            DEV_RX_OFFLOAD_VLAN_EXTEND)
>> -            PMD_INIT_LOG(ERR, "VLAN QinQ is not "
>> -                    "supported in fm10k");
>> -    }
>> -
>> -    if (mask & ETH_VLAN_FILTER_MASK) {
>> -        if (!(dev->data->dev_conf.rxmode.offloads &
>> -            DEV_RX_OFFLOAD_VLAN_FILTER))
>> -            PMD_INIT_LOG(ERR, "VLAN filter is always on in fm10k");
>> -    }
>> -
>>       return 0;
>>   }
>>   diff --git a/drivers/net/hinic/hinic_pmd_ethdev.c 
>> b/drivers/net/hinic/hinic_pmd_ethdev.c
>> index 0c3e1c0..0009a61 100644
>> --- a/drivers/net/hinic/hinic_pmd_ethdev.c
>> +++ b/drivers/net/hinic/hinic_pmd_ethdev.c
>> @@ -1701,12 +1701,6 @@ static int hinic_vlan_offload_set(struct 
>> rte_eth_dev *dev, int mask)
>>                 nic_dev->proc_dev_name, dev->data->port_id);
>>       }
>>   -    if (mask & ETH_VLAN_EXTEND_MASK) {
>> -        PMD_DRV_LOG(ERR, "Don't support vlan qinq, device: %s, 
>> port_id: %d",
>> -              nic_dev->proc_dev_name, dev->data->port_id);
>> -        return -ENOTSUP;
>> -    }
>> -
>>       return 0;
>>   }
>>   diff --git a/drivers/net/i40e/i40e_ethdev.c 
>> b/drivers/net/i40e/i40e_ethdev.c
>> index 970a31c..9211cf5 100644
>> --- a/drivers/net/i40e/i40e_ethdev.c
>> +++ b/drivers/net/i40e/i40e_ethdev.c
>> @@ -3877,11 +3877,6 @@ i40e_vlan_offload_set(struct rte_eth_dev *dev, 
>> int mask)
>>       struct i40e_vsi *vsi = pf->main_vsi;
>>       struct rte_eth_rxmode *rxmode;
>>   -    if (mask & ETH_QINQ_STRIP_MASK) {
>> -        PMD_DRV_LOG(ERR, "Strip qinq is not supported.");
>> -        return -ENOTSUP;
>> -    }
>> -
>>       rxmode = &dev->data->dev_conf.rxmode;
>>       if (mask & ETH_VLAN_FILTER_MASK) {
>>           if (rxmode->offloads & DEV_RX_OFFLOAD_VLAN_FILTER)
>> diff --git a/drivers/net/nfp/nfp_net.c b/drivers/net/nfp/nfp_net.c
>> index 2460ee1..b7a91ae 100644
>> --- a/drivers/net/nfp/nfp_net.c
>> +++ b/drivers/net/nfp/nfp_net.c
>> @@ -2353,11 +2353,6 @@ nfp_net_vlan_offload_set(struct rte_eth_dev 
>> *dev, int mask)
>>       hw = NFP_NET_DEV_PRIVATE_TO_HW(dev->data->dev_private);
>>       new_ctrl = 0;
>>   -    if ((mask & ETH_VLAN_FILTER_OFFLOAD) ||
>> -        (mask & ETH_VLAN_EXTEND_OFFLOAD))
>> -        PMD_DRV_LOG(INFO, "No support for ETH_VLAN_FILTER_OFFLOAD or"
>> -            " ETH_VLAN_EXTEND_OFFLOAD");
>> -
>>       /* Enable vlan strip if it is not configured yet */
>>       if ((mask & ETH_VLAN_STRIP_OFFLOAD) &&
>>           !(hw->ctrl & NFP_NET_CFG_CTRL_RXVLAN))
>> diff --git a/drivers/net/octeontx/octeontx_ethdev_ops.c 
>> b/drivers/net/octeontx/octeontx_ethdev_ops.c
>> index ff627a6..dbe13ce 100644
>> --- a/drivers/net/octeontx/octeontx_ethdev_ops.c
>> +++ b/drivers/net/octeontx/octeontx_ethdev_ops.c
>> @@ -43,16 +43,6 @@ octeontx_dev_vlan_offload_set(struct rte_eth_dev 
>> *dev, int mask)
>>         rxmode = &dev->data->dev_conf.rxmode;
>>   -    if (mask & ETH_VLAN_EXTEND_MASK) {
>> -        octeontx_log_err("Extend offload not supported");
>> -        return -ENOTSUP;
>> -    }
>> -
>> -    if (mask & ETH_VLAN_STRIP_MASK) {
>> -        octeontx_log_err("VLAN strip offload not supported");
>> -        return -ENOTSUP;
>> -    }
>> -
>>       if (mask & ETH_VLAN_FILTER_MASK) {
>>           if (rxmode->offloads & DEV_RX_OFFLOAD_VLAN_FILTER) {
>>               rc = octeontx_vlan_hw_filter(nic, true);
>> diff --git a/drivers/net/octeontx2/otx2_vlan.c 
>> b/drivers/net/octeontx2/otx2_vlan.c
>> index 322a565..7357b06 100644
>> --- a/drivers/net/octeontx2/otx2_vlan.c
>> +++ b/drivers/net/octeontx2/otx2_vlan.c
>> @@ -717,11 +717,6 @@ otx2_nix_vlan_offload_set(struct rte_eth_dev 
>> *eth_dev, int mask)
>>         rxmode = &eth_dev->data->dev_conf.rxmode;
>>   -    if (mask & ETH_VLAN_EXTEND_MASK) {
>> -        otx2_err("Extend offload not supported");
>> -        return -ENOTSUP;
>> -    }
>> -
>>       if (mask & ETH_VLAN_STRIP_MASK) {
>>           if (rxmode->offloads & DEV_RX_OFFLOAD_VLAN_STRIP) {
>>               offloads |= DEV_RX_OFFLOAD_VLAN_STRIP;
>> diff --git a/drivers/net/qede/qede_ethdev.c 
>> b/drivers/net/qede/qede_ethdev.c
>> index c4f8f12..04d17c7 100644
>> --- a/drivers/net/qede/qede_ethdev.c
>> +++ b/drivers/net/qede/qede_ethdev.c
>> @@ -1036,9 +1036,6 @@ static int qede_vlan_offload_set(struct 
>> rte_eth_dev *eth_dev, int mask)
>>           }
>>       }
>>   -    if (mask & ETH_VLAN_EXTEND_MASK)
>> -        DP_ERR(edev, "Extend VLAN not supported\n");
>> -
>>       qdev->vlan_offload_mask = mask;
>>         DP_INFO(edev, "VLAN offload mask %d\n", mask);
>> diff --git a/lib/librte_ethdev/rte_ethdev.c 
>> b/lib/librte_ethdev/rte_ethdev.c
>> index b0b0474..bf79749 100644
>> --- a/lib/librte_ethdev/rte_ethdev.c
>> +++ b/lib/librte_ethdev/rte_ethdev.c
>> @@ -3260,12 +3260,14 @@ rte_eth_dev_set_vlan_ether_type(uint16_t 
>> port_id,
>>   int
>>   rte_eth_dev_set_vlan_offload(uint16_t port_id, int offload_mask)
>>   {
>> +    struct rte_eth_dev_info dev_info;
>>       struct rte_eth_dev *dev;
>>       int ret = 0;
>>       int mask = 0;
>>       int cur, org = 0;
>>       uint64_t orig_offloads;
>>       uint64_t dev_offloads;
>> +    uint64_t new_offloads;
>>         RTE_ETH_VALID_PORTID_OR_ERR_RET(port_id, -ENODEV);
>>       dev = &rte_eth_devices[port_id];
>> @@ -3319,6 +3321,25 @@ rte_eth_dev_set_vlan_offload(uint16_t port_id, 
>> int offload_mask)
>>       if (mask == 0)
>>           return ret;
>>   +    ret = rte_eth_dev_info_get(port_id, &dev_info);
>> +    if (ret != 0)
>> +        return ret;
>> +
>> +    /*
>> +     * New added Rx VLAN offloading which are not enabled in
>> +     * rte_eth_dev_configure() must be within its device capabilities
>> +     */
>> +    if ((dev_offloads & dev_info.rx_offload_capa) != dev_offloads) {
>> +        new_offloads = dev_offloads & ~orig_offloads;
>> +        RTE_ETHDEV_LOG(ERR,
>> +            "Ethdev port_id=%u requested new added VLAN offloads "
>> +            "0x%" PRIx64 " must be within Rx offloads capabilities "
>> +            "0x%" PRIx64 " in %s()\n",
>> +            port_id, new_offloads, dev_info.rx_offload_capa,
>> +            __func__);
>> +        return -EINVAL;
>> +    }
>> +
>> RTE_FUNC_PTR_OR_ERR_RET(*dev->dev_ops->vlan_offload_set, -ENOTSUP);
>>       dev->data->dev_conf.rxmode.offloads = dev_offloads;
>>       ret = (*dev->dev_ops->vlan_offload_set)(dev, mask);
>
> .
>