From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from dpdk.org (dpdk.org [92.243.14.124]) by inbox.dpdk.org (Postfix) with ESMTP id 71EDBA2EDB for ; Fri, 6 Sep 2019 06:30:29 +0200 (CEST) Received: from [92.243.14.124] (localhost [127.0.0.1]) by dpdk.org (Postfix) with ESMTP id 345871C1C4; Fri, 6 Sep 2019 06:30:28 +0200 (CEST) Received: from mga01.intel.com (mga01.intel.com [192.55.52.88]) by dpdk.org (Postfix) with ESMTP id 889761BFC1; Fri, 6 Sep 2019 06:30:25 +0200 (CEST) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga008.fm.intel.com ([10.253.24.58]) by fmsmga101.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 05 Sep 2019 21:30:24 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.64,472,1559545200"; d="scan'208";a="183028887" Received: from fmsmsx104.amr.corp.intel.com ([10.18.124.202]) by fmsmga008.fm.intel.com with ESMTP; 05 Sep 2019 21:30:24 -0700 Received: from FMSMSX109.amr.corp.intel.com (10.18.116.9) by fmsmsx104.amr.corp.intel.com (10.18.124.202) with Microsoft SMTP Server (TLS) id 14.3.439.0; Thu, 5 Sep 2019 21:30:24 -0700 Received: from shsmsx151.ccr.corp.intel.com (10.239.6.50) by fmsmsx109.amr.corp.intel.com (10.18.116.9) with Microsoft SMTP Server (TLS) id 14.3.439.0; Thu, 5 Sep 2019 21:30:23 -0700 Received: from shsmsx105.ccr.corp.intel.com ([169.254.11.23]) by SHSMSX151.ccr.corp.intel.com ([169.254.3.53]) with mapi id 14.03.0439.000; Fri, 6 Sep 2019 12:30:22 +0800 From: "Zhang, Xiao" To: "Gavin Hu (Arm Technology China)" , "dev@dpdk.org" CC: "Lu, Wenzhuo" , "Zhao1, Wei" , "Ye, Xiaolong" , "stable@dpdk.org" Thread-Topic: [dpdk-dev] [v8] net/e1000: fix i219 hang on reset/close Thread-Index: AQHVQFUKyCnwQYEpNEy6OdlrdASVZKccWWyAgAHl4lA= Date: Fri, 6 Sep 2019 04:30:20 +0000 Message-ID: References: <1563797960-58560-1-git-send-email-xiao.zhang@intel.com> <1563808312-64145-1-git-send-email-xiao.zhang@intel.com> In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.239.127.40] Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Subject: Re: [dpdk-dev] [v8] net/e1000: fix i219 hang on reset/close X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" Hi Gavin, > -----Original Message----- > From: Gavin Hu (Arm Technology China) [mailto:Gavin.Hu@arm.com] > Sent: Thursday, September 5, 2019 2:07 PM > To: Zhang, Xiao ; dev@dpdk.org > Cc: Lu, Wenzhuo ; Zhao1, Wei ; > Ye, Xiaolong ; stable@dpdk.org > Subject: RE: [dpdk-dev] [v8] net/e1000: fix i219 hang on reset/close >=20 > Hi Xiao, >=20 > > -----Original Message----- > > From: dev On Behalf Of Xiao Zhang > > Sent: Monday, July 22, 2019 11:12 PM > > To: dev@dpdk.org > > Cc: wenzhuo.lu@intel.com; wei.zhao1@intel.com; xiaolong.ye@intel.com; > > Xiao Zhang ; stable@dpdk.org > > Subject: [dpdk-dev] [v8] net/e1000: fix i219 hang on reset/close > > > > Unit hang may occur if multiple descriptors are available in the rings > > during reset or close. This state can be detected by configure status > > by bit 8 in register. If the bit is set and there are pending > > descriptors in one of the rings, we must flush them before reset or > > close. > > > > Fixes: 80580344("e1000: support EM devices (also known as > > e1000/e1000e)") > > Cc: stable@dpdk.org > > > > Signed-off-by: Xiao Zhang > > --- > > v8 Modify to follow code style of dpdk community. > > v7 Add fix line. > > v6 Change the fix on em driver instead of igb driver and update the > > register address according to C-Spec. > > v5 Change the subject. > > v4 Correct the tail descriptor of tx ring. > > v3 Add loop to handle all tx and rx queues. > > v2 Use configuration register instead of NVM7 to get the hang state. > > --- > > drivers/net/e1000/e1000_ethdev.h | 4 ++ > > drivers/net/e1000/em_ethdev.c | 5 ++ > > drivers/net/e1000/em_rxtx.c | 111 > > +++++++++++++++++++++++++++++++++++++++ > > 3 files changed, 120 insertions(+) > > > > diff --git a/drivers/net/e1000/e1000_ethdev.h > > b/drivers/net/e1000/e1000_ethdev.h > > index 67acb73..01ff943 100644 > > --- a/drivers/net/e1000/e1000_ethdev.h > > +++ b/drivers/net/e1000/e1000_ethdev.h > > @@ -35,6 +35,9 @@ > > #define IGB_MAX_RX_QUEUE_NUM 8 > > #define IGB_MAX_RX_QUEUE_NUM_82576 16 > > > > +#define E1000_I219_MAX_RX_QUEUE_NUM 2 > > +#define E1000_I219_MAX_TX_QUEUE_NUM 2 > > + > > #define E1000_SYN_FILTER_ENABLE 0x00000001 /* syn filter enable= field > > */ > > #define E1000_SYN_FILTER_QUEUE 0x0000000E /* syn filter queue = field > > */ > > #define E1000_SYN_FILTER_QUEUE_SHIFT 1 /* syn filter queue = field */ > > @@ -522,5 +525,6 @@ int igb_action_rss_same(const struct > > rte_flow_action_rss *comp, int igb_config_rss_filter(struct > > rte_eth_dev *dev, > > struct igb_rte_flow_rss_conf *conf, > > bool add); > > +void em_flush_desc_rings(struct rte_eth_dev *dev); > > > > #endif /* _E1000_ETHDEV_H_ */ > > diff --git a/drivers/net/e1000/em_ethdev.c > > b/drivers/net/e1000/em_ethdev.c index dc88661..62d3a95 100644 > > --- a/drivers/net/e1000/em_ethdev.c > > +++ b/drivers/net/e1000/em_ethdev.c > > @@ -738,6 +738,11 @@ eth_em_stop(struct rte_eth_dev *dev) > > em_lsc_intr_disable(hw); > > > > e1000_reset_hw(hw); > > + > > + /* Flush desc rings for i219 */ > > + if (hw->mac.type >=3D e1000_pch_spt) > > + em_flush_desc_rings(dev); > > + > > if (hw->mac.type >=3D e1000_82544) > > E1000_WRITE_REG(hw, E1000_WUC, 0); > > > > diff --git a/drivers/net/e1000/em_rxtx.c b/drivers/net/e1000/em_rxtx.c > > index 708f832..55d8a67 100644 > > --- a/drivers/net/e1000/em_rxtx.c > > +++ b/drivers/net/e1000/em_rxtx.c > > @@ -18,6 +18,7 @@ > > #include > > #include > > #include > > +#include > > #include > > #include > > #include > > @@ -59,6 +60,11 @@ > > #define E1000_TX_OFFLOAD_NOTSUP_MASK \ > > (PKT_TX_OFFLOAD_MASK ^ E1000_TX_OFFLOAD_MASK) > > > > +/* PCI offset for querying configuration status register */ > > +#define PCI_CFG_STATUS_REG 0x06 > > +#define FLUSH_DESC_REQUIRED 0x100 > > + > > + > > /** > > * Structure associated with each descriptor of the RX ring of a RX qu= eue. > > */ > > @@ -2000,3 +2006,108 @@ em_txq_info_get(struct rte_eth_dev *dev, > > uint16_t queue_id, > > qinfo->conf.tx_rs_thresh =3D txq->tx_rs_thresh; > > qinfo->conf.offloads =3D txq->offloads; } > > + > > +static void > > +e1000_flush_tx_ring(struct rte_eth_dev *dev) { > > + struct e1000_hw *hw =3D E1000_DEV_PRIVATE_TO_HW(dev->data- > > >dev_private); > > + volatile struct e1000_data_desc *tx_desc; > > + volatile uint32_t *tdt_reg_addr; > > + uint32_t tdt, tctl, txd_lower =3D E1000_TXD_CMD_IFCS; > > + uint16_t size =3D 512; > > + struct em_tx_queue *txq; > > + int i; > > + > > + if (dev->data->tx_queues =3D=3D NULL) > > + return; > > + tctl =3D E1000_READ_REG(hw, E1000_TCTL); > > + E1000_WRITE_REG(hw, E1000_TCTL, tctl | E1000_TCTL_EN); > > + for (i =3D 0; i < dev->data->nb_tx_queues && > > + i < E1000_I219_MAX_TX_QUEUE_NUM; i++) { > > + txq =3D dev->data->tx_queues[i]; > > + tdt =3D E1000_READ_REG(hw, E1000_TDT(i)); > > + if (tdt !=3D txq->tx_tail) > > + return; > > + tx_desc =3D &txq->tx_ring[txq->tx_tail]; > > + tx_desc->buffer_addr =3D rte_cpu_to_le_64(txq- > > >tx_ring_phys_addr); > > + tx_desc->lower.data =3D rte_cpu_to_le_32(txd_lower | size= ); > > + tx_desc->upper.data =3D 0; > > + > > + rte_wmb(); > Tx_desc is CIO memory, should rte_cio_wmb be used here? >=20 Yes, will replay with rte_cio_wmb. > > + txq->tx_tail++; > > + if (txq->tx_tail =3D=3D txq->nb_tx_desc) > > + txq->tx_tail =3D 0; > > + rte_io_wmb(); > This line can be merged into the following line and use E1000_PCI_REG_WRI= TE > API instead, which has an rte_io_wmb included. > This not only looks better but also better for understanding. Yes it's better to remove rte_io_wmb() and replace E1000_PCI_WRITE_RELAXED = by E1000_PCI_REG_WRITE. > > + tdt_reg_addr =3D E1000_PCI_REG_ADDR(hw, E1000_TDT(i)); > > + E1000_PCI_REG_WRITE_RELAXED(tdt_reg_addr, txq->tx_tail); > > + usec_delay(250); > > + } > > +} > > + > > +static void > > +e1000_flush_rx_ring(struct rte_eth_dev *dev) { > > + uint32_t rctl, rxdctl; > > + struct e1000_hw *hw =3D E1000_DEV_PRIVATE_TO_HW(dev->data- > > >dev_private); > > + int i; > > + > > + rctl =3D E1000_READ_REG(hw, E1000_RCTL); > > + E1000_WRITE_REG(hw, E1000_RCTL, rctl & ~E1000_RCTL_EN); > > + E1000_WRITE_FLUSH(hw); > > + usec_delay(150); > > + > > + for (i =3D 0; i < dev->data->nb_rx_queues && > > + i < E1000_I219_MAX_RX_QUEUE_NUM; i++) { > > + rxdctl =3D E1000_READ_REG(hw, E1000_RXDCTL(i)); > > + /* zero the lower 14 bits (prefetch and host thresholds) = */ > > + rxdctl &=3D 0xffffc000; > > + > > + /* update thresholds: prefetch threshold to 31, > > + * host threshold to 1 and make sure the granularity > > + * is "descriptors" and not "cache lines" > > + */ > > + rxdctl |=3D (0x1F | (1UL << 8) | > > E1000_RXDCTL_THRESH_UNIT_DESC); > > + > > + E1000_WRITE_REG(hw, E1000_RXDCTL(i), rxdctl); > > + } > > + /* momentarily enable the RX ring for the changes to take effect = */ > > + E1000_WRITE_REG(hw, E1000_RCTL, rctl | E1000_RCTL_EN); > > + E1000_WRITE_FLUSH(hw); > > + usec_delay(150); > > + E1000_WRITE_REG(hw, E1000_RCTL, rctl & ~E1000_RCTL_EN); } > > + > > +/** > > + * em_flush_desc_rings - remove all descriptors from the descriptor > > +rings > > + * > > + * In i219, the descriptor rings must be emptied before > > +resetting/closing the > > + * HW. Failure to do this will cause the HW to enter a unit hang > > +state which > > + * can only be released by PCI reset on the device > > + * > > + */ > > + > > +void > > +em_flush_desc_rings(struct rte_eth_dev *dev) { > > + uint32_t fextnvm11, tdlen; > > + struct e1000_hw *hw =3D E1000_DEV_PRIVATE_TO_HW(dev->data- > > >dev_private); > > + struct rte_pci_device *pci_dev =3D RTE_ETH_DEV_TO_PCI(dev); > > + uint16_t pci_cfg_status =3D 0; > > + > > + fextnvm11 =3D E1000_READ_REG(hw, E1000_FEXTNVM11); > > + E1000_WRITE_REG(hw, E1000_FEXTNVM11, > > + fextnvm11 | > > E1000_FEXTNVM11_DISABLE_MULR_FIX); > > + tdlen =3D E1000_READ_REG(hw, E1000_TDLEN(0)); > > + rte_pci_read_config(pci_dev, &pci_cfg_status, sizeof(pci_cfg_stat= us), > > + PCI_CFG_STATUS_REG); > > + > > + /* do nothing if we're not in faulty state, or if the queue is em= pty */ > > + if ((pci_cfg_status & FLUSH_DESC_REQUIRED) && tdlen) { > > + /* flush desc ring */ > > + e1000_flush_tx_ring(dev); > > + rte_pci_read_config(pci_dev, &pci_cfg_status, > > + sizeof(pci_cfg_status), > > PCI_CFG_STATUS_REG); > > + if (pci_cfg_status & FLUSH_DESC_REQUIRED) > > + e1000_flush_rx_ring(dev); > > + } > > +} > > -- > > 2.7.4 >=20 > IMPORTANT NOTICE: The contents of this email and any attachments are > confidential and may also be privileged. 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