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 "-pedantic" 37 #endif 38 #include <rte_ether.h> 39 #include <rte_ethdev.h> 40 #ifdef PEDANTIC 41 #pragma GCC diagnostic error "-pedantic" 42 #endif 43 44 #include "mlx5.h" 45 #include "mlx5_rxtx.h" 46 #include "mlx5_utils.h" 47 48 /** 49 * DPDK callback to start the device. 50 * 51 * Simulate device start by attaching all configured flows. 52 * 53 * @param dev 54 * Pointer to Ethernet device structure. 55 * 56 * @return 57 * 0 on success, negative errno value on failure. 58 */ 59 int 60 mlx5_dev_start(struct rte_eth_dev *dev) 61 { 62 struct priv *priv = dev->data->dev_private; 63 unsigned int i = 0; 64 unsigned int r; 65 struct rxq *rxq; 66 67 priv_lock(priv); 68 if (priv->started) { 69 priv_unlock(priv); 70 return 0; 71 } 72 DEBUG("%p: attaching configured flows to all RX queues", (void *)dev); 73 priv->started = 1; 74 if (priv->rss) { 75 rxq = &priv->rxq_parent; 76 r = 1; 77 } else { 78 rxq = (*priv->rxqs)[0]; 79 r = priv->rxqs_n; 80 } 81 /* Iterate only once when RSS is enabled. */ 82 do { 83 int ret; 84 85 /* Ignore nonexistent RX queues. */ 86 if (rxq == NULL) 87 continue; 88 ret = rxq_mac_addrs_add(rxq); 89 if (!ret) 90 continue; 91 WARN("%p: QP flow attachment failed: %s", 92 (void *)dev, strerror(ret)); 93 /* Rollback. */ 94 while (i != 0) { 95 rxq = (*priv->rxqs)[--i]; 96 if (rxq != NULL) { 97 rxq_mac_addrs_del(rxq); 98 } 99 } 100 priv->started = 0; 101 priv_unlock(priv); 102 return -ret; 103 } while ((--r) && ((rxq = (*priv->rxqs)[++i]), i)); 104 priv_unlock(priv); 105 return 0; 106 } 107 108 /** 109 * DPDK callback to stop the device. 110 * 111 * Simulate device stop by detaching all configured flows. 112 * 113 * @param dev 114 * Pointer to Ethernet device structure. 115 */ 116 void 117 mlx5_dev_stop(struct rte_eth_dev *dev) 118 { 119 struct priv *priv = dev->data->dev_private; 120 unsigned int i = 0; 121 unsigned int r; 122 struct rxq *rxq; 123 124 priv_lock(priv); 125 if (!priv->started) { 126 priv_unlock(priv); 127 return; 128 } 129 DEBUG("%p: detaching flows from all RX queues", (void *)dev); 130 priv->started = 0; 131 if (priv->rss) { 132 rxq = &priv->rxq_parent; 133 r = 1; 134 } else { 135 rxq = (*priv->rxqs)[0]; 136 r = priv->rxqs_n; 137 } 138 /* Iterate only once when RSS is enabled. */ 139 do { 140 /* Ignore nonexistent RX queues. */ 141 if (rxq == NULL) 142 continue; 143 rxq_mac_addrs_del(rxq); 144 } while ((--r) && ((rxq = (*priv->rxqs)[++i]), i)); 145 priv_unlock(priv); 146 } 147