From 31eb471d0cb0105ab74ee637028f4ab3cc00cf2a Mon Sep 17 00:00:00 2001 From: =?utf8?q?Beno=C3=AEt=20Ganne?= Date: Wed, 13 May 2020 14:48:01 +0200 Subject: [PATCH] dpdk: fix crash with chelsio pmd MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit cxgbe PMD initializes its control channel as part of dev_configure(), and trying to get link status prior to it will lead to a crash. DPDK documentation loosely hints that we should not call any device function before dev_start(), call link_state() only for the relevant PMDs. From DPDK API documentation: The functions exported by the application Ethernet API to setup a device designated by its port identifier must be invoked in the following order: rte_eth_dev_configure() rte_eth_tx_queue_setup() rte_eth_rx_queue_setup() rte_eth_dev_start() Then, the network application can invoke, in any order, the functions exported by the Ethernet API to get the MAC address of a given device, to get the speed and the status of a device physical link, to receive/transmit [burst of] packets, and so on. Type: fix Change-Id: I12d2ab4d84e6bd72a9f695447e86f3222929c804 Signed-off-by: Benoît Ganne --- src/plugins/dpdk/device/init.c | 18 ++++++++++++------ 1 file changed, 12 insertions(+), 6 deletions(-) diff --git a/src/plugins/dpdk/device/init.c b/src/plugins/dpdk/device/init.c index ae50b7aa253..0b80f5d4906 100644 --- a/src/plugins/dpdk/device/init.c +++ b/src/plugins/dpdk/device/init.c @@ -259,7 +259,6 @@ dpdk_lib_init (dpdk_main_t * dm) int vlan_off; struct rte_eth_dev_info dev_info; struct rte_pci_device *pci_dev; - struct rte_eth_link l; dpdk_portid_t next_port_id; dpdk_device_config_t *devconf = 0; vlib_pci_addr_t pci_addr; @@ -268,7 +267,6 @@ dpdk_lib_init (dpdk_main_t * dm) if (!rte_eth_dev_is_valid_port(i)) continue; - rte_eth_link_get_nowait (i, &l); rte_eth_dev_info_get (i, &dev_info); if (dev_info.device == 0) @@ -519,9 +517,13 @@ dpdk_lib_init (dpdk_main_t * dm) /* Cisco VIC */ case VNET_DPDK_PMD_ENIC: - xd->port_type = port_type_from_link_speed (l.link_speed); - if (dm->conf->enable_tcp_udp_checksum) - dpdk_enable_l4_csum_offload (xd); + { + struct rte_eth_link l; + rte_eth_link_get_nowait (i, &l); + xd->port_type = port_type_from_link_speed (l.link_speed); + if (dm->conf->enable_tcp_udp_checksum) + dpdk_enable_l4_csum_offload (xd); + } break; /* Intel Red Rock Canyon */ @@ -566,7 +568,11 @@ dpdk_lib_init (dpdk_main_t * dm) break; case VNET_DPDK_PMD_NETVSC: - xd->port_type = port_type_from_link_speed (l.link_speed); + { + struct rte_eth_link l; + rte_eth_link_get_nowait (i, &l); + xd->port_type = port_type_from_link_speed (l.link_speed); + } break; default: -- 2.16.6