[dpdk-dev] 答复: [PATCH v5 14/15] net/hinic: add tx/rx package burst

[Ferruh Yigit]

On 6/26/2019 4:58 PM, Xuanziyang (William, Chip Application Design Logic and
Hardware Development Dept IT_Products & Solutions) wrote:
>> On 6/19/2019 5:20 PM, Ziyang Xuan wrote:
>>> This patch add package sending and receiving function codes.
>>>
>>> Signed-off-by: Ziyang Xuan <xuanziyang2 at huawei.com>
>>
>> <...>
>>
>>> @@ -543,6 +728,113 @@ void hinic_free_all_rx_skbs(struct hinic_rxq *rxq)
>>>  	}
>>>  }
>>>
>>> +static inline void hinic_rq_cqe_be_to_cpu32(void *dst_le32,
>>> +					    volatile void *src_be32)
>>> +{
>>> +#ifndef __ARM64_NEON__
>>> +	volatile __m128i *wqe_be = (volatile __m128i *)src_be32;
>>> +	__m128i *wqe_le = (__m128i *)dst_le32;
>>> +	__m128i shuf_mask =  _mm_set_epi8(12, 13, 14, 15, 8, 9, 10,
>>> +					  11, 4, 5, 6, 7, 0, 1, 2, 3);
>>> +
>>> +	/* l2nic just use first 128 bits */
>>> +	wqe_le[0] = _mm_shuffle_epi8(wqe_be[0], shuf_mask); #else
>>> +	volatile uint8x16_t *wqe_be = (volatile uint8x16_t *)src_be32;
>>> +	uint8x16_t *wqe_le = (uint8x16_t *)dst_le32;
>>> +	const uint8x16_t shuf_mask = {3, 2, 1, 0, 7, 6, 5, 4, 11, 10,
>>> +					9, 8, 15, 14, 13, 12};
>>> +
>>> +	/* l2nic just use first 128 bits */
>>> +	wqe_le[0] = vqtbl1q_u8(wqe_be[0], shuf_mask); #endif }
>>
>> I am aware documentation says only arm64 and x86_64 are supported and
>> default config files default values implemented that way, still I believe it is
>> safer to not just assume it is either one or other.
>> What do you think explicitly check X86_64 too, as done for ARM64?
> 
> Hi Ferruh,
> 
> As you said, we just support arm64 and x86_64. First we determine arm64 using 
> "CONFIG_RTE_ARCH_ARM64" to define "__ARM64_NEON__" micro in Makefile.
> If it has not defined "__ARM64_NEON__", it must be X86_64. This is our present situation.
> 
> 
> I think we can use the same method to determine "X86_64" using "CONFIG_RTE_ARCH_X86_64".
> If it is neither "ARM64" nor "X86_64", we can use "rte_be_to_cpu_32" and "rte_cpu_to_be_32".
> How do you think about this?

+1

> 
> Looking forward to your comments.
> 
> Thank you!
> 
> Best Regards,
> Ziyang Xuan
>