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 #include <stddef.h> 35 #include <errno.h> 36 #include <assert.h> 37 #include <stdint.h> 38 39 #include <rte_ethdev.h> 40 #include <rte_common.h> 41 42 #include "mlx5_utils.h" 43 #include "mlx5.h" 44 #include "mlx5_autoconf.h" 45 46 /** 47 * DPDK callback to configure a VLAN filter. 48 * 49 * @param dev 50 * Pointer to Ethernet device structure. 51 * @param vlan_id 52 * VLAN ID to filter. 53 * @param on 54 * Toggle filter. 55 * 56 * @return 57 * 0 on success, negative errno value on failure. 58 */ 59 int 60 mlx5_vlan_filter_set(struct rte_eth_dev *dev, uint16_t vlan_id, int on) 61 { 62 struct priv *priv = dev->data->dev_private; 63 unsigned int i; 64 int ret = 0; 65 66 priv_lock(priv); 67 DEBUG("%p: %s VLAN filter ID %" PRIu16, 68 (void *)dev, (on ? "enable" : "disable"), vlan_id); 69 assert(priv->vlan_filter_n <= RTE_DIM(priv->vlan_filter)); 70 for (i = 0; (i != priv->vlan_filter_n); ++i) 71 if (priv->vlan_filter[i] == vlan_id) 72 break; 73 /* Check if there's room for another VLAN filter. */ 74 if (i == RTE_DIM(priv->vlan_filter)) { 75 ret = -ENOMEM; 76 goto out; 77 } 78 if (i < priv->vlan_filter_n) { 79 assert(priv->vlan_filter_n != 0); 80 /* Enabling an existing VLAN filter has no effect. */ 81 if (on) 82 goto out; 83 /* Remove VLAN filter from list. */ 84 --priv->vlan_filter_n; 85 memmove(&priv->vlan_filter[i], 86 &priv->vlan_filter[i + 1], 87 sizeof(priv->vlan_filter[i]) * 88 (priv->vlan_filter_n - i)); 89 priv->vlan_filter[priv->vlan_filter_n] = 0; 90 } else { 91 assert(i == priv->vlan_filter_n); 92 /* Disabling an unknown VLAN filter has no effect. */ 93 if (!on) 94 goto out; 95 /* Add new VLAN filter. */ 96 priv->vlan_filter[priv->vlan_filter_n] = vlan_id; 97 ++priv->vlan_filter_n; 98 } 99 if (dev->data->dev_started) 100 priv_dev_traffic_restart(priv, dev); 101 out: 102 priv_unlock(priv); 103 return ret; 104 } 105 106 /** 107 * Set/reset VLAN stripping for a specific queue. 108 * 109 * @param priv 110 * Pointer to private structure. 111 * @param idx 112 * RX queue index. 113 * @param on 114 * Enable/disable VLAN stripping. 115 */ 116 static void 117 priv_vlan_strip_queue_set(struct priv *priv, uint16_t idx, int on) 118 { 119 struct mlx5_rxq_data *rxq = (*priv->rxqs)[idx]; 120 struct mlx5_rxq_ctrl *rxq_ctrl = 121 container_of(rxq, struct mlx5_rxq_ctrl, rxq); 122 struct ibv_wq_attr mod; 123 uint16_t vlan_offloads = 124 (on ? IBV_WQ_FLAGS_CVLAN_STRIPPING : 0) | 125 0; 126 int err; 127 128 DEBUG("set VLAN offloads 0x%x for port %d queue %d", 129 vlan_offloads, rxq->port_id, idx); 130 if (!rxq_ctrl->ibv) { 131 /* Update related bits in RX queue. */ 132 rxq->vlan_strip = !!on; 133 return; 134 } 135 mod = (struct ibv_wq_attr){ 136 .attr_mask = IBV_WQ_ATTR_FLAGS, 137 .flags_mask = IBV_WQ_FLAGS_CVLAN_STRIPPING, 138 .flags = vlan_offloads, 139 }; 140 141 err = ibv_modify_wq(rxq_ctrl->ibv->wq, &mod); 142 if (err) { 143 ERROR("%p: failed to modified stripping mode: %s", 144 (void *)priv, strerror(err)); 145 return; 146 } 147 148 /* Update related bits in RX queue. */ 149 rxq->vlan_strip = !!on; 150 } 151 152 /** 153 * Callback to set/reset VLAN stripping for a specific queue. 154 * 155 * @param dev 156 * Pointer to Ethernet device structure. 157 * @param queue 158 * RX queue index. 159 * @param on 160 * Enable/disable VLAN stripping. 161 */ 162 void 163 mlx5_vlan_strip_queue_set(struct rte_eth_dev *dev, uint16_t queue, int on) 164 { 165 struct priv *priv = dev->data->dev_private; 166 167 /* Validate hw support */ 168 if (!priv->hw_vlan_strip) { 169 ERROR("VLAN stripping is not supported"); 170 return; 171 } 172 173 /* Validate queue number */ 174 if (queue >= priv->rxqs_n) { 175 ERROR("VLAN stripping, invalid queue number %d", queue); 176 return; 177 } 178 179 priv_lock(priv); 180 priv_vlan_strip_queue_set(priv, queue, on); 181 priv_unlock(priv); 182 } 183 184 /** 185 * Callback to set/reset VLAN offloads for a port. 186 * 187 * @param dev 188 * Pointer to Ethernet device structure. 189 * @param mask 190 * VLAN offload bit mask. 191 */ 192 int 193 mlx5_vlan_offload_set(struct rte_eth_dev *dev, int mask) 194 { 195 struct priv *priv = dev->data->dev_private; 196 unsigned int i; 197 198 if (mask & ETH_VLAN_STRIP_MASK) { 199 int hw_vlan_strip = !!dev->data->dev_conf.rxmode.hw_vlan_strip; 200 201 if (!priv->hw_vlan_strip) { 202 ERROR("VLAN stripping is not supported"); 203 return 0; 204 } 205 206 /* Run on every RX queue and set/reset VLAN stripping. */ 207 priv_lock(priv); 208 for (i = 0; (i != priv->rxqs_n); i++) 209 priv_vlan_strip_queue_set(priv, i, hw_vlan_strip); 210 priv_unlock(priv); 211 } 212 213 return 0; 214 } 215