From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mga01.intel.com (mga01.intel.com [192.55.52.88]) by dpdk.org (Postfix) with ESMTP id 9DF3E2B96 for ; Thu, 29 Jun 2017 17:08:12 +0200 (CEST) Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by fmsmga101.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 29 Jun 2017 08:08:11 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.40,281,1496127600"; d="scan'208";a="1188552214" Received: from dpdk6.bj.intel.com ([172.16.182.81]) by fmsmga002.fm.intel.com with ESMTP; 29 Jun 2017 08:08:09 -0700 From: Wei Dai To: thomas@monjalon.net, wenzhuo.lu@intel.com, konstantin.ananyev@intel.com, helin.zhang@intel.com, jingjing.wu@intel.com, yuan.pntel.com Cc: dev@dpdk.org, Wei Dai Date: Thu, 29 Jun 2017 22:57:57 +0800 Message-Id: <1498748282-69914-1-git-send-email-wei.dai@intel.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <20170629083404.1271-1-wei.dai@intel.com> References: <20170629083404.1271-1-wei.dai@intel.com> Subject: [dpdk-dev] [PATCH v4 0/5] Support NIC reset and keep same port id 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: , X-List-Received-Date: Thu, 29 Jun 2017 15:08:13 -0000 Sometimes a port have to be reset. For example PF is reset, all its VF should also be reset. After reset, if the port goes through PCI remove() and then PCI probe() for restoration, its port id may be changed and this is not expected by some customer DPDK application. Normally, PCI probe() includes two parts: one is in rte_ethdev layer and the other is calling PMD dev_init(). PCI remove( ) release all resource allocated from rte_ethdev layer in PCI probe( ) and calls PMD dev_unit( ). To keep same port id and reset the port, only dev_uninit() and dev_init( ) in PMD can be called and keep all resources allocated from rte_ethdev layer poart in PCI probe( ). New rte_eth_dev_reset( ) calls rte_eth_dev_stop( ), PMD dev_uninit( ) and then PMD dev_init( ) to reset a port and keep same port id. And then application can go through rte_eth_dev_configure( ), rte_eth_rx_queue_setup( ), rte_eth_tx_queue_setup( ) and rte_eth_dev_start( ) again to restore its previous settings or to reconfigure itself with different settings. To test this new feature, a testpmd command "port reset port_id" is added. The mapping between port number and its PCI address can be monitored to confirm its port number is kept. And following test case can also be used to confirm the port can work again after reset. A typical test steps are listed as follows: For example, run "ifconfig PF-name down" will trigger a reset to VF. 1. run testpmd with 2 ixgbe VF ports belonging to same PF 2. testpmd > set verbose 1 //to observe VF working 3. testpmd > show port info all //show port number, PCI addr and MAC addr 4. testpmd > start 5. let all ports forwarding work for a while 6. testpmd > show port stats all 7. ifconfig name-of-PF down 8. A message is shown in testmd to indicate PF reset 9. ifconfig name-of-PF up 10. testpmd > stop // stop forwarding to avoid crash during reset 11. testpmd > port reset all 12. testpmd > port stop all 13. testpmd > port start all //recofnig all ports 14. testpmd > show port info all //confirm same mapping of port id and PCI addr 15. testpmd > start // restore forwarding 14. let all ports forwarding work for a while 15. testpmd > show port stats all //confirm all port can work again 16. repeat above step 7 - 15 chagnes: v4: add PCI address to confirm its port number keep same correct test method in cover letter v3: update testpmd command v2: only reset PMD layer resource and keep same port id, but not restore settings Wei Dai (5): ethdev: add support of NIC reset net/ixgbe: add support of reset net/i40e: add support of reset app/testpmd: display PCI address in port info app/testpmd: enhance command to test NIC reset app/test-pmd/cmdline.c | 10 ++++-- app/test-pmd/config.c | 5 +++ app/test-pmd/testpmd.c | 61 ++++++++++++++++++++++++++++++++-- app/test-pmd/testpmd.h | 1 + drivers/net/i40e/i40e_ethdev.c | 16 +++++++++ drivers/net/i40e/i40e_ethdev_vf.c | 16 +++++++++ drivers/net/ixgbe/ixgbe_ethdev.c | 38 +++++++++++++++++++++ lib/librte_ether/rte_ethdev.c | 16 +++++++++ lib/librte_ether/rte_ethdev.h | 12 +++++++ lib/librte_ether/rte_ether_version.map | 2 +- 10 files changed, 170 insertions(+), 7 deletions(-) -- 2.7.4