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[
    {
        "id": 116550,
        "web_url": "https://patches.dpdk.org/comment/116550/",
        "msgid": "<039ED4275CED7440929022BC67E7061154864F86@SHSMSX103.ccr.corp.intel.com>",
        "date": "2020-07-23T12:53:23",
        "subject": "Re: [dpdk-dev] [PATCH v3] net/i40e: fix incorrect hash look up table",
        "submitter": {
            "id": 504,
            "url": "https://patches.dpdk.org/api/people/504/",
            "name": "Zhang, Qi Z",
            "email": "qi.z.zhang@intel.com"
        },
        "content": "> -----Original Message-----\n> From: dev <dev-bounces@dpdk.org> On Behalf Of Yang, Qiming\n> Sent: Thursday, July 23, 2020 9:57 AM\n> To: Wang, ShougangX <shougangx.wang@intel.com>; dev@dpdk.org\n> Cc: Xing, Beilei <beilei.xing@intel.com>; Guo, Jia <jia.guo@intel.com>; Wang,\n> ShougangX <shougangx.wang@intel.com>; stable@dpdk.org\n> Subject: Re: [dpdk-dev] [PATCH v3] net/i40e: fix incorrect hash look up table\n> \n> I don't understand why you add new function and new function mostly do the\n> same thing.\n> Why don't add fix in original code.\n> \n> > -----Original Message-----\n> > From: dev <dev-bounces@dpdk.org> On Behalf Of Shougang Wang\n> > Sent: Wednesday, July 22, 2020 16:16\n> > To: dev@dpdk.org\n> > Cc: Xing, Beilei <beilei.xing@intel.com>; Guo, Jia\n> > <jia.guo@intel.com>; Wang, ShougangX <shougangx.wang@intel.com>;\n> > stable@dpdk.org\n> > Subject: [dpdk-dev] [PATCH v3] net/i40e: fix incorrect hash look up\n> > table\n> >\n> > The hash look up table (LUT) is managed by global register but it is\n> > not initialized when RSS is disabled. Once user wants to enable RSS\n> > during runtime, the LUT will not be initialized.\n> > This patch fixes the issue by initializing the LUT whether RSS enabled or not.\n> >\n> > Fixes: feaae285b342 (\"net/i40e: support hash configuration in RSS\n> > flow\")\n> > Cc: stable@dpdk.org\n> >\n> > Signed-off-by: Shougang Wang <shougangx.wang@intel.com>\n> > ---\n> > v3:\n> > -Updated the time of initializing the look up table\n> > ---\n> >  drivers/net/i40e/i40e_ethdev.c | 85\n> > ++++++++++++++++++++--------------\n> >  1 file changed, 49 insertions(+), 36 deletions(-)\n> >\n> > diff --git a/drivers/net/i40e/i40e_ethdev.c\n> > b/drivers/net/i40e/i40e_ethdev.c index 05d5f2861..e35590d96 100644\n> > --- a/drivers/net/i40e/i40e_ethdev.c\n> > +++ b/drivers/net/i40e/i40e_ethdev.c\n> > @@ -8984,42 +8984,7 @@ i40e_pf_calc_configured_queues_num(struct\n> > i40e_pf *pf)  static int  i40e_pf_config_rss(struct i40e_pf *pf)  {\n> > -\tstruct i40e_hw *hw = I40E_PF_TO_HW(pf);\n> >  \tstruct rte_eth_rss_conf rss_conf;\n> > -\tuint32_t i, lut = 0;\n> > -\tuint16_t j, num;\n> > -\n> > -\t/*\n> > -\t * If both VMDQ and RSS enabled, not all of PF queues are\n> > configured.\n> > -\t * It's necessary to calculate the actual PF queues that are configured.\n> > -\t */\n> > -\tif (pf->dev_data->dev_conf.rxmode.mq_mode &\n> > ETH_MQ_RX_VMDQ_FLAG)\n> > -\t\tnum = i40e_pf_calc_configured_queues_num(pf);\n> > -\telse\n> > -\t\tnum = pf->dev_data->nb_rx_queues;\n> > -\n> > -\tnum = RTE_MIN(num, I40E_MAX_Q_PER_TC);\n> > -\tPMD_INIT_LOG(INFO, \"Max of contiguous %u PF queues are\n> > configured\",\n> > -\t\t\tnum);\n> > -\n> > -\tif (num == 0) {\n> > -\t\tPMD_INIT_LOG(ERR,\n> > -\t\t\t\"No PF queues are configured to enable RSS for port\n> > %u\",\n> > -\t\t\tpf->dev_data->port_id);\n> > -\t\treturn -ENOTSUP;\n> > -\t}\n> > -\n> > -\tif (pf->adapter->rss_reta_updated == 0) {\n> > -\t\tfor (i = 0, j = 0; i < hw->func_caps.rss_table_size; i++, j++) {\n> > -\t\t\tif (j == num)\n> > -\t\t\t\tj = 0;\n> > -\t\t\tlut = (lut << 8) | (j & ((0x1 <<\n> > -\t\t\t\thw->func_caps.rss_table_entry_width) - 1));\n> > -\t\t\tif ((i & 3) == 3)\n> > -\t\t\t\tI40E_WRITE_REG(hw, I40E_PFQF_HLUT(i >>\n> > 2),\n> > -\t\t\t\t\t       rte_bswap32(lut));\n> > -\t\t}\n> > -\t}\n> >\n> >  \trss_conf = pf->dev_data->dev_conf.rx_adv_conf.rss_conf;\n> >  \tif ((rss_conf.rss_hf & pf->adapter->flow_types_mask) == 0) { @@ -\n> > 9195,12 +9160,60 @@ i40e_tunnel_filter_handle(struct rte_eth_dev *dev,\n> >  \treturn ret;\n> >  }\n> >\n> > +/* Initialize the hash look up table */ static int\n> > +i40e_pf_init_rss_lut(struct i40e_pf *pf) {\n> > +\tstruct i40e_hw *hw = I40E_PF_TO_HW(pf);\n> > +\tuint32_t lut = 0;\n> > +\tuint16_t j, num;\n> > +\tuint32_t i;\n> > +\n> > +\t/* If both VMDQ and RSS enabled, not all of PF queues are\n> > configured.\n> > +\t * It's necessary to calculate the actual PF queues that are configured.\n> > +\t */\n> > +\tif (pf->dev_data->dev_conf.rxmode.mq_mode &\n> > ETH_MQ_RX_VMDQ_FLAG)\n> > +\t\tnum = i40e_pf_calc_configured_queues_num(pf);\n> > +\telse\n> > +\t\tnum = pf->dev_data->nb_rx_queues;\n> > +\n> > +\tnum = RTE_MIN(num, I40E_MAX_Q_PER_TC);\n> > +\tPMD_INIT_LOG(INFO, \"Max of contiguous %u PF queues are\n> > configured\",\n> > +\t\t     num);\n> > +\n> > +\tif (num == 0) {\n> > +\t\tPMD_INIT_LOG(ERR,\n> > +\t\t\t\"No PF queues are configured to enable RSS for port\n> > %u\",\n> > +\t\t\tpf->dev_data->port_id);\n> > +\t\treturn -ENOTSUP;\n> > +\t}\n> > +\n> > +\tif (pf->adapter->rss_reta_updated == 0) {\n> > +\t\tfor (i = 0, j = 0; i < hw->func_caps.rss_table_size; i++, j++) {\n> > +\t\t\tif (j == num)\n> > +\t\t\t\tj = 0;\n> > +\t\t\tlut = (lut << 8) | (j & ((0x1 <<\n> > +\t\t\t\thw->func_caps.rss_table_entry_width) - 1));\n> > +\t\t\tif ((i & 3) == 3)\n> > +\t\t\t\tI40E_WRITE_REG(hw, I40E_PFQF_HLUT(i >>\n> > 2),\n> > +\t\t\t\t\t       rte_bswap32(lut));\n> > +\t\t}\n> > +\t}\n> > +\n> > +\treturn 0;\n> > +}\n> > +\n> >  static int\n> >  i40e_pf_config_mq_rx(struct i40e_pf *pf)  {\n> > -\tint ret = 0;\n> > +\tint ret;\n> >  \tenum rte_eth_rx_mq_mode mq_mode = pf->dev_data-\n> > >dev_conf.rxmode.mq_mode;\n> >\n> > +\t/* Initialize hash look up table */\n> > +\tret = i40e_pf_init_rss_lut(pf);\n> > +\tif (ret)\n> > +\t\treturn ret;\n> > +\n> >  \t/* RSS setup */\n> >  \tif (mq_mode & ETH_MQ_RX_RSS_FLAG)\n\nI agree with Qiming, if we move this check into i40e_pf_config_rss, dose that looks we don't need to create a new function?\n\n> >  \t\tret = i40e_pf_config_rss(pf);\n> > --\n> > 2.17.1",
        "headers": {
            "Return-Path": "<dev-bounces@dpdk.org>",
            "dlp-version": "11.2.0.6",
            "dlp-reaction": "no-action",
            "References": "<20200715063515.9262-1-shougangx.wang@intel.com>\n <20200722081543.52396-1-shougangx.wang@intel.com>\n <BN6PR11MB0017E2387CBB71123F8F74DFE5760@BN6PR11MB0017.namprd11.prod.outlook.com>",
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                "E=Sophos;i=\"5.75,386,1589266800\"; d=\"scan'208\";a=\"488819830\""
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            "From": "\"Zhang, Qi Z\" <qi.z.zhang@intel.com>",
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            "CC": "\"Xing, Beilei\" <beilei.xing@intel.com>, \"Guo, Jia\" <jia.guo@intel.com>,\n \"Wang, ShougangX\" <shougangx.wang@intel.com>, \"stable@dpdk.org\"\n <stable@dpdk.org>",
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            ],
            "Subject": "Re: [dpdk-dev] [PATCH v3] net/i40e: fix incorrect hash look up table",
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            "Thread-Topic": "[dpdk-dev] [PATCH v3] net/i40e: fix incorrect hash look up table",
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            "To": "\"Yang, Qiming\" <qiming.yang@intel.com>, \"Wang, ShougangX\"\n <shougangx.wang@intel.com>, \"dev@dpdk.org\" <dev@dpdk.org>",
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    },
    {
        "id": 116527,
        "web_url": "https://patches.dpdk.org/comment/116527/",
        "msgid": "<BN6PR11MB0017E2387CBB71123F8F74DFE5760@BN6PR11MB0017.namprd11.prod.outlook.com>",
        "date": "2020-07-23T01:57:03",
        "subject": "Re: [dpdk-dev] [PATCH v3] net/i40e: fix incorrect hash look up table",
        "submitter": {
            "id": 522,
            "url": "https://patches.dpdk.org/api/people/522/",
            "name": "Yang, Qiming",
            "email": "qiming.yang@intel.com"
        },
        "content": "I don't understand why you add new function and new function mostly do the same thing.\nWhy don't add fix in original code.\n\n> -----Original Message-----\n> From: dev <dev-bounces@dpdk.org> On Behalf Of Shougang Wang\n> Sent: Wednesday, July 22, 2020 16:16\n> To: dev@dpdk.org\n> Cc: Xing, Beilei <beilei.xing@intel.com>; Guo, Jia <jia.guo@intel.com>; Wang,\n> ShougangX <shougangx.wang@intel.com>; stable@dpdk.org\n> Subject: [dpdk-dev] [PATCH v3] net/i40e: fix incorrect hash look up table\n> \n> The hash look up table (LUT) is managed by global register but it is not\n> initialized when RSS is disabled. Once user wants to enable RSS during\n> runtime, the LUT will not be initialized.\n> This patch fixes the issue by initializing the LUT whether RSS enabled or not.\n> \n> Fixes: feaae285b342 (\"net/i40e: support hash configuration in RSS flow\")\n> Cc: stable@dpdk.org\n> \n> Signed-off-by: Shougang Wang <shougangx.wang@intel.com>\n> ---\n> v3:\n> -Updated the time of initializing the look up table\n> ---\n>  drivers/net/i40e/i40e_ethdev.c | 85 ++++++++++++++++++++--------------\n>  1 file changed, 49 insertions(+), 36 deletions(-)\n> \n> diff --git a/drivers/net/i40e/i40e_ethdev.c b/drivers/net/i40e/i40e_ethdev.c\n> index 05d5f2861..e35590d96 100644\n> --- a/drivers/net/i40e/i40e_ethdev.c\n> +++ b/drivers/net/i40e/i40e_ethdev.c\n> @@ -8984,42 +8984,7 @@ i40e_pf_calc_configured_queues_num(struct\n> i40e_pf *pf)  static int  i40e_pf_config_rss(struct i40e_pf *pf)  {\n> -\tstruct i40e_hw *hw = I40E_PF_TO_HW(pf);\n>  \tstruct rte_eth_rss_conf rss_conf;\n> -\tuint32_t i, lut = 0;\n> -\tuint16_t j, num;\n> -\n> -\t/*\n> -\t * If both VMDQ and RSS enabled, not all of PF queues are\n> configured.\n> -\t * It's necessary to calculate the actual PF queues that are configured.\n> -\t */\n> -\tif (pf->dev_data->dev_conf.rxmode.mq_mode &\n> ETH_MQ_RX_VMDQ_FLAG)\n> -\t\tnum = i40e_pf_calc_configured_queues_num(pf);\n> -\telse\n> -\t\tnum = pf->dev_data->nb_rx_queues;\n> -\n> -\tnum = RTE_MIN(num, I40E_MAX_Q_PER_TC);\n> -\tPMD_INIT_LOG(INFO, \"Max of contiguous %u PF queues are\n> configured\",\n> -\t\t\tnum);\n> -\n> -\tif (num == 0) {\n> -\t\tPMD_INIT_LOG(ERR,\n> -\t\t\t\"No PF queues are configured to enable RSS for port\n> %u\",\n> -\t\t\tpf->dev_data->port_id);\n> -\t\treturn -ENOTSUP;\n> -\t}\n> -\n> -\tif (pf->adapter->rss_reta_updated == 0) {\n> -\t\tfor (i = 0, j = 0; i < hw->func_caps.rss_table_size; i++, j++) {\n> -\t\t\tif (j == num)\n> -\t\t\t\tj = 0;\n> -\t\t\tlut = (lut << 8) | (j & ((0x1 <<\n> -\t\t\t\thw->func_caps.rss_table_entry_width) - 1));\n> -\t\t\tif ((i & 3) == 3)\n> -\t\t\t\tI40E_WRITE_REG(hw, I40E_PFQF_HLUT(i >>\n> 2),\n> -\t\t\t\t\t       rte_bswap32(lut));\n> -\t\t}\n> -\t}\n> \n>  \trss_conf = pf->dev_data->dev_conf.rx_adv_conf.rss_conf;\n>  \tif ((rss_conf.rss_hf & pf->adapter->flow_types_mask) == 0) { @@ -\n> 9195,12 +9160,60 @@ i40e_tunnel_filter_handle(struct rte_eth_dev *dev,\n>  \treturn ret;\n>  }\n> \n> +/* Initialize the hash look up table */ static int\n> +i40e_pf_init_rss_lut(struct i40e_pf *pf) {\n> +\tstruct i40e_hw *hw = I40E_PF_TO_HW(pf);\n> +\tuint32_t lut = 0;\n> +\tuint16_t j, num;\n> +\tuint32_t i;\n> +\n> +\t/* If both VMDQ and RSS enabled, not all of PF queues are\n> configured.\n> +\t * It's necessary to calculate the actual PF queues that are configured.\n> +\t */\n> +\tif (pf->dev_data->dev_conf.rxmode.mq_mode &\n> ETH_MQ_RX_VMDQ_FLAG)\n> +\t\tnum = i40e_pf_calc_configured_queues_num(pf);\n> +\telse\n> +\t\tnum = pf->dev_data->nb_rx_queues;\n> +\n> +\tnum = RTE_MIN(num, I40E_MAX_Q_PER_TC);\n> +\tPMD_INIT_LOG(INFO, \"Max of contiguous %u PF queues are\n> configured\",\n> +\t\t     num);\n> +\n> +\tif (num == 0) {\n> +\t\tPMD_INIT_LOG(ERR,\n> +\t\t\t\"No PF queues are configured to enable RSS for port\n> %u\",\n> +\t\t\tpf->dev_data->port_id);\n> +\t\treturn -ENOTSUP;\n> +\t}\n> +\n> +\tif (pf->adapter->rss_reta_updated == 0) {\n> +\t\tfor (i = 0, j = 0; i < hw->func_caps.rss_table_size; i++, j++) {\n> +\t\t\tif (j == num)\n> +\t\t\t\tj = 0;\n> +\t\t\tlut = (lut << 8) | (j & ((0x1 <<\n> +\t\t\t\thw->func_caps.rss_table_entry_width) - 1));\n> +\t\t\tif ((i & 3) == 3)\n> +\t\t\t\tI40E_WRITE_REG(hw, I40E_PFQF_HLUT(i >>\n> 2),\n> +\t\t\t\t\t       rte_bswap32(lut));\n> +\t\t}\n> +\t}\n> +\n> +\treturn 0;\n> +}\n> +\n>  static int\n>  i40e_pf_config_mq_rx(struct i40e_pf *pf)  {\n> -\tint ret = 0;\n> +\tint ret;\n>  \tenum rte_eth_rx_mq_mode mq_mode = pf->dev_data-\n> >dev_conf.rxmode.mq_mode;\n> \n> +\t/* Initialize hash look up table */\n> +\tret = i40e_pf_init_rss_lut(pf);\n> +\tif (ret)\n> +\t\treturn ret;\n> +\n>  \t/* RSS setup */\n>  \tif (mq_mode & ETH_MQ_RX_RSS_FLAG)\n>  \t\tret = i40e_pf_config_rss(pf);\n> --\n> 2.17.1",
        "headers": {
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            "References": "<20200715063515.9262-1-shougangx.wang@intel.com>\n <20200722081543.52396-1-shougangx.wang@intel.com>",
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            "CC": "\"Xing, Beilei\" <beilei.xing@intel.com>, \"Guo, Jia\" <jia.guo@intel.com>,\n \"Wang, ShougangX\" <shougangx.wang@intel.com>, \"stable@dpdk.org\"\n <stable@dpdk.org>",
            "Thread-Topic": "[dpdk-dev] [PATCH v3] net/i40e: fix incorrect hash look up table",
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    {
        "id": 116565,
        "web_url": "https://patches.dpdk.org/comment/116565/",
        "msgid": "<BYAPR11MB3477A02730D77D5AC29B4E6088770@BYAPR11MB3477.namprd11.prod.outlook.com>",
        "date": "2020-07-24T02:34:41",
        "subject": "Re: [dpdk-dev] [PATCH v3] net/i40e: fix incorrect hash look up table",
        "submitter": {
            "id": 1418,
            "url": "https://patches.dpdk.org/api/people/1418/",
            "name": "Shougang Wang",
            "email": "shougangx.wang@intel.com"
        },
        "content": "> -----Original Message-----\n> From: Zhang, Qi Z <qi.z.zhang@intel.com>\n> Sent: Thursday, July 23, 2020 8:53 PM\n> To: Yang, Qiming <qiming.yang@intel.com>; Wang, ShougangX\n> <shougangx.wang@intel.com>; dev@dpdk.org\n> Cc: Xing, Beilei <beilei.xing@intel.com>; Guo, Jia <jia.guo@intel.com>; Wang,\n> ShougangX <shougangx.wang@intel.com>; stable@dpdk.org\n> Subject: RE: [dpdk-dev] [PATCH v3] net/i40e: fix incorrect hash look up table\n> \n> \n> \n> > -----Original Message-----\n> > From: dev <dev-bounces@dpdk.org> On Behalf Of Yang, Qiming\n> > Sent: Thursday, July 23, 2020 9:57 AM\n> > To: Wang, ShougangX <shougangx.wang@intel.com>; dev@dpdk.org\n> > Cc: Xing, Beilei <beilei.xing@intel.com>; Guo, Jia\n> > <jia.guo@intel.com>; Wang, ShougangX <shougangx.wang@intel.com>;\n> > stable@dpdk.org\n> > Subject: Re: [dpdk-dev] [PATCH v3] net/i40e: fix incorrect hash look\n> > up table\n> >\n> > I don't understand why you add new function and new function mostly do\n> > the same thing.\n> > Why don't add fix in original code.\n> >\n<snip>\n> > >  static int\n> > >  i40e_pf_config_mq_rx(struct i40e_pf *pf)  {\n> > > -\tint ret = 0;\n> > > +\tint ret;\n> > >  \tenum rte_eth_rx_mq_mode mq_mode = pf->dev_data-\n> > > >dev_conf.rxmode.mq_mode;\n> > >\n> > > +\t/* Initialize hash look up table */\n> > > +\tret = i40e_pf_init_rss_lut(pf);\n> > > +\tif (ret)\n> > > +\t\treturn ret;\n> > > +\n> > >  \t/* RSS setup */\n> > >  \tif (mq_mode & ETH_MQ_RX_RSS_FLAG)\n> \n> I agree with Qiming, if we move this check into i40e_pf_config_rss, dose that\n> looks we don't need to create a new function?\nIndeed, I will do like this.\n> \n> > >  \t\tret = i40e_pf_config_rss(pf);\n> > > --\n> > > 2.17.1\n>",
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