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Mon, 4 Oct 2021 11:18:47 +0000 To: "Wu, Jingjing" , "Xing, Beilei" CC: "dev@dpdk.org" , "Doherty, Declan" , "Sinha, Abhijit" , "Zhang, Qi Z" , "Richardson, Bruce" , "Ananyev, Konstantin" References: <20210909142428.750634-1-radu.nicolau@intel.com> <20211001095130.3343083-1-radu.nicolau@intel.com> <20211001095130.3343083-7-radu.nicolau@intel.com> From: "Nicolau, Radu" Message-ID: <78f20f9f-9bc2-a033-7342-9ccf2d43e2aa@intel.com> Date: Mon, 4 Oct 2021 12:18:40 +0100 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:78.0) Gecko/20100101 Firefox/78.0 Thunderbird/78.14.0 In-Reply-To: Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 8bit Content-Language: en-GB X-ClientProxiedBy: DU2PR04CA0056.eurprd04.prod.outlook.com (2603:10a6:10:234::31) To CO1PR11MB4868.namprd11.prod.outlook.com (2603:10b6:303:90::19) MIME-Version: 1.0 Received: from [192.168.1.12] (109.255.186.106) by DU2PR04CA0056.eurprd04.prod.outlook.com (2603:10a6:10:234::31) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4566.13 via Frontend Transport; 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Xing, Beilei >> Cc: dev@dpdk.org; Doherty, Declan ; Sinha, Abhijit >> ; Zhang, Qi Z ; Richardson, Bruce >> ; Ananyev, Konstantin ; >> Nicolau, Radu >> Subject: [PATCH v4 6/6] net/iavf: add watchdog for VFLR >> >> Add watchdog to iAVF PMD which support monitoring the VFLR register. If >> the device is not already in reset then if a VF reset in progress is >> detected then notfiy user through callback and set into reset state. >> If the device is already in reset then poll for completion of reset. >> >> Signed-off-by: Declan Doherty >> Signed-off-by: Radu Nicolau >> --- >> drivers/net/iavf/iavf.h | 6 +++ >> drivers/net/iavf/iavf_ethdev.c | 97 ++++++++++++++++++++++++++++++++++ >> 2 files changed, 103 insertions(+) >> >> diff --git a/drivers/net/iavf/iavf.h b/drivers/net/iavf/iavf.h >> index d5f574b4b3..4481d2e134 100644 >> --- a/drivers/net/iavf/iavf.h >> +++ b/drivers/net/iavf/iavf.h >> @@ -212,6 +212,12 @@ struct iavf_info { >> int cmd_retval; /* return value of the cmd response from PF */ >> uint8_t *aq_resp; /* buffer to store the adminq response from PF */ >> >> + struct { >> + uint8_t enabled:1; >> + uint64_t period_us; >> + } watchdog; >> + /** iAVF watchdog configuration */ >> + >> /* Event from pf */ >> bool dev_closed; >> bool link_up; >> diff --git a/drivers/net/iavf/iavf_ethdev.c b/drivers/net/iavf/iavf_ethdev.c >> index aad6a28585..d02aa9c1c5 100644 >> --- a/drivers/net/iavf/iavf_ethdev.c >> +++ b/drivers/net/iavf/iavf_ethdev.c >> @@ -24,6 +24,7 @@ >> #include >> #include >> #include >> +#include >> >> #include "iavf.h" >> #include "iavf_rxtx.h" >> @@ -239,6 +240,94 @@ iavf_tm_ops_get(struct rte_eth_dev *dev __rte_unused, >> return 0; >> } >> >> + >> +static int >> +iavf_vfr_inprogress(struct iavf_hw *hw) >> +{ >> + int inprogress = 0; >> + >> + if ((IAVF_READ_REG(hw, IAVF_VFGEN_RSTAT) & >> + IAVF_VFGEN_RSTAT_VFR_STATE_MASK) == >> + VIRTCHNL_VFR_INPROGRESS) >> + inprogress = 1; >> + >> + if (inprogress) >> + PMD_DRV_LOG(INFO, "Watchdog detected VFR in progress"); >> + >> + return inprogress; >> +} >> + >> +static void >> +iavf_dev_watchdog(void *cb_arg) >> +{ >> + struct iavf_adapter *adapter = cb_arg; >> + struct iavf_hw *hw = IAVF_DEV_PRIVATE_TO_HW(adapter); >> + int vfr_inprogress = 0, rc = 0; >> + >> + /* check if watchdog has been disabled since last call */ >> + if (!adapter->vf.watchdog.enabled) >> + return; >> + >> + /* If in reset then poll vfr_inprogress register for completion */ >> + if (adapter->vf.vf_reset) { >> + vfr_inprogress = iavf_vfr_inprogress(hw); >> + >> + if (!vfr_inprogress) { >> + PMD_DRV_LOG(INFO, "VF \"%s\" reset has completed", >> + adapter->eth_dev->data->name); >> + adapter->vf.vf_reset = false; >> + } >> + /* If not in reset then poll vfr_inprogress register for VFLR event */ >> + } else { >> + vfr_inprogress = iavf_vfr_inprogress(hw); >> + >> + if (vfr_inprogress) { >> + PMD_DRV_LOG(INFO, >> + "VF \"%s\" reset event has been detected by watchdog", >> + adapter->eth_dev->data->name); >> + >> + /* enter reset state with VFLR event */ >> + adapter->vf.vf_reset = true; >> + >> + rte_eth_dev_callback_process(adapter->eth_dev, >> + RTE_ETH_EVENT_INTR_RESET, NULL); >> + } >> + } >> + >> + /* re-alarm watchdog */ >> + rc = rte_eal_alarm_set(adapter->vf.watchdog.period_us, >> + &iavf_dev_watchdog, cb_arg); >> + >> + if (rc) >> + PMD_DRV_LOG(ERR, "Failed \"%s\" to reset device watchdog alarm", >> + adapter->eth_dev->data->name); >> +} >> + >> +static void >> +iavf_dev_watchdog_enable(struct iavf_adapter *adapter, uint64_t period_us) >> +{ >> + int rc; >> + >> + PMD_DRV_LOG(INFO, "Enabling device watchdog"); >> + >> + adapter->vf.watchdog.enabled = 1; >> + adapter->vf.watchdog.period_us = period_us; >> + >> + rc = rte_eal_alarm_set(adapter->vf.watchdog.period_us, >> + &iavf_dev_watchdog, (void *)adapter); >> + if (rc) >> + PMD_DRV_LOG(ERR, "Failed to enabled device watchdog"); >> +} >> + >> +static void >> +iavf_dev_watchdog_disable(struct iavf_adapter *adapter) >> +{ >> + PMD_DRV_LOG(INFO, "Disabling device watchdog"); >> + >> + adapter->vf.watchdog.enabled = 0; >> + adapter->vf.watchdog.period_us = 0; >> +} >> + >> static int >> iavf_set_mc_addr_list(struct rte_eth_dev *dev, >> struct rte_ether_addr *mc_addrs, >> @@ -2448,6 +2537,11 @@ iavf_dev_init(struct rte_eth_dev *eth_dev) >> >> iavf_default_rss_disable(adapter); >> >> + >> + /* Start device watchdog, set polling period to 500us */ >> + iavf_dev_watchdog_enable(adapter, 500); >> + > Besides checking VFGEN_RSTAT, there is a process to handle VIRTCHNL_OP_EVENT from PF. What is the change for? Any scenario which VIRTCHNL_OP_EVENT doesn't cover? > And how is the 500us been determined? Hi Jingjing, thanks for reviewing, I think this can be handled with the VIRTCHNL_OP_EVENT  with no need for a watchdog alarm, I will rework the patch.