[dpdk-stable] [PATCH v2 19.11.6 3/7] net/hns3: report Tx descriptor segment limitations

[oulijun]

在 2020/11/25 17:16, Luca Boccassi 写道:
> On Wed, 2020-11-25 at 11:24 +0800, Lijun Ou wrote:
>> [ upstream commit eb8b3a0d829bc109dfb13de9c8cdeacda5449e69 ]
>>
>> According to the user manual of Kunpeng920 SoC, the max allowed number
>> of segments per whole packet is 63 and the max number of segments per
>> packet is 8 in datapath.
>>
>> This patch reports the Two segment parameters of Tx descriptor
>> limitations to DPDK framework.
>>
>> Signed-off-by: Lijun Ou <oulijun at huawei.com>
>> Signed-off-by: Wei Hu (Xavier) <xavier.huwei at huawei.com>
>> ---
>>   drivers/net/hns3/hns3_ethdev.c    | 2 ++
>>   drivers/net/hns3/hns3_ethdev_vf.c | 2 ++
>>   2 files changed, 4 insertions(+)
>>
>> diff --git a/drivers/net/hns3/hns3_ethdev.c b/drivers/net/hns3/hns3_ethdev.c
>> index 3a92bd4..7fd0f7f 100644
>> --- a/drivers/net/hns3/hns3_ethdev.c
>> +++ b/drivers/net/hns3/hns3_ethdev.c
>> @@ -2499,6 +2499,8 @@ hns3_dev_infos_get(struct rte_eth_dev *eth_dev, struct rte_eth_dev_info *info)
>>   		.nb_max = HNS3_MAX_RING_DESC,
>>   		.nb_min = HNS3_MIN_RING_DESC,
>>   		.nb_align = HNS3_ALIGN_RING_DESC,
>> +		.nb_seg_max = HNS3_MAX_TSO_BD_PER_PKT,
>> +		.nb_mtu_seg_max = HNS3_MAX_NON_TSO_BD_PER_PKT,
>>   	};
>>   
>>   	info->vmdq_queue_num = 0;
>> diff --git a/drivers/net/hns3/hns3_ethdev_vf.c b/drivers/net/hns3/hns3_ethdev_vf.c
>> index 4359b2e..0b5d3d4 100644
>> --- a/drivers/net/hns3/hns3_ethdev_vf.c
>> +++ b/drivers/net/hns3/hns3_ethdev_vf.c
>> @@ -866,6 +866,8 @@ hns3vf_dev_infos_get(struct rte_eth_dev *eth_dev, struct rte_eth_dev_info *info)
>>   		.nb_max = HNS3_MAX_RING_DESC,
>>   		.nb_min = HNS3_MIN_RING_DESC,
>>   		.nb_align = HNS3_ALIGN_RING_DESC,
>> +		.nb_seg_max = HNS3_MAX_TSO_BD_PER_PKT,
>> +		.nb_mtu_seg_max = HNS3_MAX_NON_TSO_BD_PER_PKT,
>>   	};
>>   
>>   	info->vmdq_queue_num = 0;
> 
> Hi,
> 
> Thanks for the series, but it fails to build, because of this patch:
> 
> ../drivers/net/hns3/hns3_ethdev.c: In function ‘hns3_dev_infos_get’:
> ../drivers/net/hns3/hns3_ethdev.c:2502:17: error: ‘HNS3_MAX_TSO_BD_PER_PKT’ undeclared (first use in this function); did you mean ‘HNS3_MAX_TX_BD_PER_PKT’?
>     .nb_seg_max = HNS3_MAX_TSO_BD_PER_PKT,
>                   ^~~~~~~~~~~~~~~~~~~~~~~
>                   HNS3_MAX_TX_BD_PER_PKT
> ../drivers/net/hns3/hns3_ethdev.c:2502:17: note: each undeclared identifier is reported only once for each function it appears in
> ../drivers/net/hns3/hns3_ethdev.c:2503:21: error: ‘HNS3_MAX_NON_TSO_BD_PER_PKT’ undeclared (first use in this function); did you mean ‘HNS3_MAX_TX_BD_PER_PKT’?
>     .nb_mtu_seg_max = HNS3_MAX_NON_TSO_BD_PER_PKT,
>                       ^~~~~~~~~~~~~~~~~~~~~~~~~~~
>                       HNS3_MAX_TX_BD_PER_PKT
> [3/32] Compiling C object 'drivers/a715181@@tmp_rte_pmd_hns3 at sta/net_hns3_hns3_intr.c.o'.
> ninja: build stopped: subcommand failed.
> 
Sorry， I will remove it and send the V3.