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From: "Chen, BoX C" <box.c.chen@intel.com>
To: "Wang, ShougangX" <shougangx.wang@intel.com>,
	"dev@dpdk.org" <dev@dpdk.org>
Cc: "Xing, Beilei" <beilei.xing@intel.com>,
	"Guo, Jia" <jia.guo@intel.com>,
	"Wang, ShougangX" <shougangx.wang@intel.com>,
	"stable@dpdk.org" <stable@dpdk.org>
Subject: Re: [dpdk-stable] [dpdk-dev] [PATCH] net/i40e: fix incorrect hash look up table
Date: Wed, 15 Jul 2020 09:07:32 +0000
Message-ID: <BN6PR11MB16674F432499443F98F1172CD97E0@BN6PR11MB1667.namprd11.prod.outlook.com> (raw)
In-Reply-To: <20200715063515.9262-1-shougangx.wang@intel.com>

Tested-by: zhang,xi <xix.zhang@intel.com>

Regards,
Chen Bo

> -----Original Message-----
> From: dev <dev-bounces@dpdk.org> On Behalf Of Shougang Wang
> Sent: July 15, 2020 14:35
> To: dev@dpdk.org
> Cc: Xing, Beilei <beilei.xing@intel.com>; Guo, Jia <jia.guo@intel.com>; Wang,
> ShougangX <shougangx.wang@intel.com>; stable@dpdk.org
> Subject: [dpdk-dev] [PATCH] net/i40e: fix incorrect hash look up table
> 
> The hash look up table(LUT) will not be initializing when starting testpmd with
> --disable-rss. So that some queues in LUT will be invalid if rx queues is less
> than last time. When enable RSS by creating RSS rule, some packets will not
> be into the valid queues.
> This patch fixes this issue by initializing the LUT when creating an RSS rule.
> 
> Fixes: feaae285b342 ("net/i40e: support hash configuration in RSS flow")
> Cc: stable@dpdk.org
> 
> Signed-off-by: Shougang Wang <shougangx.wang@intel.com>
> ---
>  drivers/net/i40e/i40e_ethdev.c | 52
> ++++++++++++++++++++++++++++++++++
>  1 file changed, 52 insertions(+)
> 
> diff --git a/drivers/net/i40e/i40e_ethdev.c b/drivers/net/i40e/i40e_ethdev.c
> index 393b5320f..2a92bd8ef 100644
> --- a/drivers/net/i40e/i40e_ethdev.c
> +++ b/drivers/net/i40e/i40e_ethdev.c
> @@ -13070,6 +13070,49 @@ i40e_rss_conf_init(struct
> i40e_rte_flow_rss_conf *out,
>  	return 0;
>  }
> 
> +static int
> +i40e_rss_init_lut(struct i40e_pf *pf)
> +{
> +	struct i40e_hw *hw = I40E_PF_TO_HW(pf);
> +	uint32_t lut = 0;
> +	uint16_t j, num;
> +	uint32_t i;
> +
> +	/*
> +	 * If both VMDQ and RSS enabled, not all of PF queues are configured.
> +	 * It's necessary to calculate the actual PF queues that are configured.
> +	 */
> +	if (pf->dev_data->dev_conf.rxmode.mq_mode &
> ETH_MQ_RX_VMDQ_FLAG)
> +		num = i40e_pf_calc_configured_queues_num(pf);
> +	else
> +		num = pf->dev_data->nb_rx_queues;
> +
> +	num = RTE_MIN(num, I40E_MAX_Q_PER_TC);
> +	PMD_INIT_LOG(INFO, "Max of contiguous %u PF queues are
> configured",
> +		     num);
> +
> +	if (num == 0) {
> +		PMD_INIT_LOG(ERR,
> +			"No PF queues are configured to enable RSS for
> port %u",
> +			pf->dev_data->port_id);
> +		return -ENOTSUP;
> +	}
> +
> +	if (pf->adapter->rss_reta_updated == 0) {
> +		for (i = 0, j = 0; i < hw->func_caps.rss_table_size; i++, j++) {
> +			if (j == num)
> +				j = 0;
> +			lut = (lut << 8) | (j & ((0x1 <<
> +				hw->func_caps.rss_table_entry_width) - 1));
> +			if ((i & 3) == 3)
> +				I40E_WRITE_REG(hw, I40E_PFQF_HLUT(i >>
> 2),
> +					       rte_bswap32(lut));
> +		}
> +	}
> +
> +	return 0;
> +}
> +
>  /* Write HENA register to enable hash */  static int  i40e_rss_hash_set(struct
> i40e_pf *pf, struct i40e_rte_flow_rss_conf *rss_conf) @@ -13318,12
> +13361,21 @@ static int  i40e_rss_enable_hash(struct i40e_pf *pf,
>  		struct i40e_rte_flow_rss_conf *conf)
>  {
> +	enum rte_eth_rx_mq_mode mq_mode =
> +pf->dev_data->dev_conf.rxmode.mq_mode;
>  	struct i40e_rte_flow_rss_conf *rss_info = &pf->rss_info;
>  	struct i40e_rte_flow_rss_conf rss_conf;
> 
>  	if (!(conf->conf.types & pf->adapter->flow_types_mask))
>  		return -ENOTSUP;
> 
> +	/*
> +	 * If the RSS is disabled before this, the LUT is uninitialized.
> +	 * So it is necessary to initialize it here.
> +	 */
> +	if (!(mq_mode & ETH_MQ_RX_RSS_FLAG) && !pf-
> >rss_info.conf.queue_num)
> +		if (i40e_rss_init_lut(pf))
> +			return -ENOTSUP;
> +
>  	memset(&rss_conf, 0, sizeof(rss_conf));
>  	rte_memcpy(&rss_conf, conf, sizeof(rss_conf));
> 
> --
> 2.17.1


  reply	other threads:[~2020-07-15  9:07 UTC|newest]

Thread overview: 23+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-07-15  6:35 [dpdk-stable] " Shougang Wang
2020-07-15  9:07 ` Chen, BoX C [this message]
2020-07-18  4:07   ` [dpdk-stable] [dpdk-dev] " Jeff Guo
2020-07-21  5:49 ` [dpdk-stable] [PATCH v2] " Shougang Wang
2020-07-21  6:41   ` [dpdk-stable] [dpdk-dev] " Xie, WeiX
2020-07-22  5:50     ` Jeff Guo
2020-07-22  6:39       ` Wang, ShougangX
2020-07-22  5:31   ` Zhang, Qi Z
2020-07-22  6:20     ` Wang, ShougangX
2020-07-22  8:15 ` [dpdk-stable] [PATCH v3] " Shougang Wang
2020-07-23  1:57   ` [dpdk-stable] [dpdk-dev] " Yang, Qiming
2020-07-23 12:53     ` Zhang, Qi Z
2020-07-24  2:34       ` Wang, ShougangX
2020-07-24  2:47 ` [dpdk-stable] [PATCH v4] " Shougang Wang
2020-07-24  3:57   ` Jeff Guo
2020-07-24  4:49     ` Wang, ShougangX
2020-07-24  5:07   ` [dpdk-stable] [dpdk-dev] " Yang, Qiming
2020-07-24  5:42     ` Wang, ShougangX
2020-07-24  8:12 ` [dpdk-stable] [PATCH v5] " Shougang Wang
2020-07-24  9:00   ` [dpdk-stable] [dpdk-dev] " Xie, WeiX
2020-07-24  9:38 ` [dpdk-stable] [PATCH v6] " Shougang Wang
2020-07-24  9:54   ` Jeff Guo
2020-07-24  9:58     ` [dpdk-stable] [dpdk-dev] " Zhang, Qi Z

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