1 /*- 2 * BSD LICENSE 3 * 4 * Copyright 2015 6WIND S.A. 5 * Copyright 2015 Mellanox. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 11 * * Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * * Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in 15 * the documentation and/or other materials provided with the 16 * distribution. 17 * * Neither the name of 6WIND S.A. nor the names of its 18 * contributors may be used to endorse or promote products derived 19 * from this software without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 22 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 24 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 25 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 26 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 27 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 28 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 29 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 30 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 31 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32 */ 33 34 /* DPDK headers don't like -pedantic. */ 35 #ifdef PEDANTIC 36 #pragma GCC diagnostic ignored "-Wpedantic" 37 #endif 38 #include <rte_ether.h> 39 #include <rte_ethdev.h> 40 #include <rte_interrupts.h> 41 #include <rte_alarm.h> 42 #ifdef PEDANTIC 43 #pragma GCC diagnostic error "-Wpedantic" 44 #endif 45 46 #include "mlx5.h" 47 #include "mlx5_rxtx.h" 48 #include "mlx5_utils.h" 49 50 /** 51 * DPDK callback to start the device. 52 * 53 * Simulate device start by attaching all configured flows. 54 * 55 * @param dev 56 * Pointer to Ethernet device structure. 57 * 58 * @return 59 * 0 on success, negative errno value on failure. 60 */ 61 int 62 mlx5_dev_start(struct rte_eth_dev *dev) 63 { 64 struct priv *priv = dev->data->dev_private; 65 int err; 66 67 if (mlx5_is_secondary()) 68 return -E_RTE_SECONDARY; 69 70 priv_lock(priv); 71 if (priv->started) { 72 priv_unlock(priv); 73 return 0; 74 } 75 DEBUG("%p: allocating and configuring hash RX queues", (void *)dev); 76 err = priv_create_hash_rxqs(priv); 77 if (!err) 78 err = priv_rehash_flows(priv); 79 if (!err) 80 priv->started = 1; 81 else { 82 ERROR("%p: an error occurred while configuring hash RX queues:" 83 " %s", 84 (void *)priv, strerror(err)); 85 /* Rollback. */ 86 priv_special_flow_disable_all(priv); 87 priv_mac_addrs_disable(priv); 88 priv_destroy_hash_rxqs(priv); 89 } 90 if (dev->data->dev_conf.fdir_conf.mode != RTE_FDIR_MODE_NONE) 91 priv_fdir_enable(priv); 92 priv_dev_interrupt_handler_install(priv, dev); 93 err = priv_flow_start(priv); 94 priv_unlock(priv); 95 return -err; 96 } 97 98 /** 99 * DPDK callback to stop the device. 100 * 101 * Simulate device stop by detaching all configured flows. 102 * 103 * @param dev 104 * Pointer to Ethernet device structure. 105 */ 106 void 107 mlx5_dev_stop(struct rte_eth_dev *dev) 108 { 109 struct priv *priv = dev->data->dev_private; 110 111 if (mlx5_is_secondary()) 112 return; 113 114 priv_lock(priv); 115 if (!priv->started) { 116 priv_unlock(priv); 117 return; 118 } 119 DEBUG("%p: cleaning up and destroying hash RX queues", (void *)dev); 120 priv_special_flow_disable_all(priv); 121 priv_mac_addrs_disable(priv); 122 priv_destroy_hash_rxqs(priv); 123 priv_fdir_disable(priv); 124 priv_flow_stop(priv); 125 priv_dev_interrupt_handler_uninstall(priv, dev); 126 priv->started = 0; 127 priv_unlock(priv); 128 } 129