dpdk: fix crash with chelsio pmd - vpp - Vector Packet Processing

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author	Benoît Ganne <bganne@cisco.com>	2020-05-13 14:48:01 +0200
committer	Damjan Marion <dmarion@me.com>	2020-05-14 12:25:27 +0000
commit	31eb471d0cb0105ab74ee637028f4ab3cc00cf2a (patch)
tree	e0420f75015dc67db42dc14ca2c8d1620ecb13e6 /src/vppinfra/test_time_range.c
parent	3f0579e8df831d42745e0b97191eb5e4bcffb011 (diff)

dpdk: fix crash with chelsio pmd

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 <bganne@cisco.com>

Diffstat (limited to 'src/vppinfra/test_time_range.c')

0 files changed, 0 insertions, 0 deletions

/* * Copyright (c) 2016 Cisco and/or its affiliates. * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at: * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ #ifndef __FIB_WALK_H__ #define __FIB_WALK_H__ #include <vnet/fib/fib_node.h> /** * @brief Walk priorities. * Strict priorities. All walks a priority n are completed before n+1 is started. * Increasing numerical value implies decreasing priority. */ typedef enum fib_walk_priority_t_ { FIB_WALK_PRIORITY_HIGH = 0, FIB_WALK_PRIORITY_LOW = 1, } fib_walk_priority_t; #define FIB_WALK_PRIORITY_NUM ((fib_walk_priority_t)(FIB_WALK_PRIORITY_LOW+1)) #define FIB_WALK_PRIORITIES { \ [FIB_WALK_PRIORITY_HIGH] = "high", \ [FIB_WALK_PRIORITY_LOW] = "low", \ } #define FOR_EACH_FIB_WALK_PRIORITY(_prio) \ for ((_prio) = FIB_WALK_PRIORITY_HIGH; \ (_prio) < FIB_WALK_PRIORITY_NUM; \ (_prio)++) extern void fib_walk_module_init(void); extern void fib_walk_async(fib_node_type_t parent_type, fib_node_index_t parent_index, fib_walk_priority_t prio, fib_node_back_walk_ctx_t *ctx); extern void fib_walk_sync(fib_node_type_t parent_type, fib_node_index_t parent_index, fib_node_back_walk_ctx_t *ctx); extern u8* format_fib_walk_priority(u8 *s, va_list *ap); extern void fib_walk_process_enable(void); extern void fib_walk_process_disable(void); #endif


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