Aviv Heller | 7907f23 | 2016-04-17 16:57:32 +0300 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2016, Mellanox Technologies. All rights reserved. |
| 3 | * |
| 4 | * This software is available to you under a choice of one of two |
| 5 | * licenses. You may choose to be licensed under the terms of the GNU |
| 6 | * General Public License (GPL) Version 2, available from the file |
| 7 | * COPYING in the main directory of this source tree, or the |
| 8 | * OpenIB.org BSD license below: |
| 9 | * |
| 10 | * Redistribution and use in source and binary forms, with or |
| 11 | * without modification, are permitted provided that the following |
| 12 | * conditions are met: |
| 13 | * |
| 14 | * - Redistributions of source code must retain the above |
| 15 | * copyright notice, this list of conditions and the following |
| 16 | * disclaimer. |
| 17 | * |
| 18 | * - Redistributions in binary form must reproduce the above |
| 19 | * copyright notice, this list of conditions and the following |
| 20 | * disclaimer in the documentation and/or other materials |
| 21 | * provided with the distribution. |
| 22 | * |
| 23 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, |
| 24 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF |
| 25 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
| 26 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS |
| 27 | * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN |
| 28 | * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN |
| 29 | * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| 30 | * SOFTWARE. |
| 31 | */ |
| 32 | |
| 33 | #include <linux/netdevice.h> |
| 34 | #include <linux/mlx5/driver.h> |
| 35 | #include <linux/mlx5/vport.h> |
| 36 | #include "mlx5_core.h" |
| 37 | |
| 38 | enum { |
| 39 | MLX5_LAG_FLAG_BONDED = 1 << 0, |
| 40 | }; |
| 41 | |
| 42 | struct lag_func { |
| 43 | struct mlx5_core_dev *dev; |
| 44 | struct net_device *netdev; |
| 45 | }; |
| 46 | |
| 47 | /* Used for collection of netdev event info. */ |
| 48 | struct lag_tracker { |
| 49 | enum netdev_lag_tx_type tx_type; |
| 50 | struct netdev_lag_lower_state_info netdev_state[MLX5_MAX_PORTS]; |
| 51 | bool is_bonded; |
| 52 | }; |
| 53 | |
| 54 | /* LAG data of a ConnectX card. |
| 55 | * It serves both its phys functions. |
| 56 | */ |
| 57 | struct mlx5_lag { |
| 58 | u8 flags; |
| 59 | u8 v2p_map[MLX5_MAX_PORTS]; |
| 60 | struct lag_func pf[MLX5_MAX_PORTS]; |
| 61 | struct lag_tracker tracker; |
| 62 | struct delayed_work bond_work; |
| 63 | struct notifier_block nb; |
| 64 | }; |
| 65 | |
| 66 | /* General purpose, use for short periods of time. |
| 67 | * Beware of lock dependencies (preferably, no locks should be acquired |
| 68 | * under it). |
| 69 | */ |
| 70 | static DEFINE_MUTEX(lag_mutex); |
| 71 | |
| 72 | static int mlx5_cmd_create_lag(struct mlx5_core_dev *dev, u8 remap_port1, |
| 73 | u8 remap_port2) |
| 74 | { |
| 75 | u32 in[MLX5_ST_SZ_DW(create_lag_in)] = {0}; |
| 76 | u32 out[MLX5_ST_SZ_DW(create_lag_out)] = {0}; |
| 77 | void *lag_ctx = MLX5_ADDR_OF(create_lag_in, in, ctx); |
| 78 | |
| 79 | MLX5_SET(create_lag_in, in, opcode, MLX5_CMD_OP_CREATE_LAG); |
| 80 | |
| 81 | MLX5_SET(lagc, lag_ctx, tx_remap_affinity_1, remap_port1); |
| 82 | MLX5_SET(lagc, lag_ctx, tx_remap_affinity_2, remap_port2); |
| 83 | |
| 84 | return mlx5_cmd_exec(dev, in, sizeof(in), out, sizeof(out)); |
| 85 | } |
| 86 | |
| 87 | static int mlx5_cmd_modify_lag(struct mlx5_core_dev *dev, u8 remap_port1, |
| 88 | u8 remap_port2) |
| 89 | { |
| 90 | u32 in[MLX5_ST_SZ_DW(modify_lag_in)] = {0}; |
| 91 | u32 out[MLX5_ST_SZ_DW(modify_lag_out)] = {0}; |
| 92 | void *lag_ctx = MLX5_ADDR_OF(modify_lag_in, in, ctx); |
| 93 | |
| 94 | MLX5_SET(modify_lag_in, in, opcode, MLX5_CMD_OP_MODIFY_LAG); |
| 95 | MLX5_SET(modify_lag_in, in, field_select, 0x1); |
| 96 | |
| 97 | MLX5_SET(lagc, lag_ctx, tx_remap_affinity_1, remap_port1); |
| 98 | MLX5_SET(lagc, lag_ctx, tx_remap_affinity_2, remap_port2); |
| 99 | |
| 100 | return mlx5_cmd_exec(dev, in, sizeof(in), out, sizeof(out)); |
| 101 | } |
| 102 | |
| 103 | static int mlx5_cmd_destroy_lag(struct mlx5_core_dev *dev) |
| 104 | { |
| 105 | u32 in[MLX5_ST_SZ_DW(destroy_lag_in)] = {0}; |
| 106 | u32 out[MLX5_ST_SZ_DW(destroy_lag_out)] = {0}; |
| 107 | |
| 108 | MLX5_SET(destroy_lag_in, in, opcode, MLX5_CMD_OP_DESTROY_LAG); |
| 109 | |
| 110 | return mlx5_cmd_exec(dev, in, sizeof(in), out, sizeof(out)); |
| 111 | } |
| 112 | |
| 113 | static struct mlx5_lag *mlx5_lag_dev_get(struct mlx5_core_dev *dev) |
| 114 | { |
| 115 | return dev->priv.lag; |
| 116 | } |
| 117 | |
| 118 | static int mlx5_lag_dev_get_netdev_idx(struct mlx5_lag *ldev, |
| 119 | struct net_device *ndev) |
| 120 | { |
| 121 | int i; |
| 122 | |
| 123 | for (i = 0; i < MLX5_MAX_PORTS; i++) |
| 124 | if (ldev->pf[i].netdev == ndev) |
| 125 | return i; |
| 126 | |
| 127 | return -1; |
| 128 | } |
| 129 | |
| 130 | static bool mlx5_lag_is_bonded(struct mlx5_lag *ldev) |
| 131 | { |
| 132 | return !!(ldev->flags & MLX5_LAG_FLAG_BONDED); |
| 133 | } |
| 134 | |
| 135 | static void mlx5_infer_tx_affinity_mapping(struct lag_tracker *tracker, |
| 136 | u8 *port1, u8 *port2) |
| 137 | { |
| 138 | if (tracker->tx_type == NETDEV_LAG_TX_TYPE_ACTIVEBACKUP) { |
| 139 | if (tracker->netdev_state[0].tx_enabled) { |
| 140 | *port1 = 1; |
| 141 | *port2 = 1; |
| 142 | } else { |
| 143 | *port1 = 2; |
| 144 | *port2 = 2; |
| 145 | } |
| 146 | } else { |
| 147 | *port1 = 1; |
| 148 | *port2 = 2; |
| 149 | if (!tracker->netdev_state[0].link_up) |
| 150 | *port1 = 2; |
| 151 | else if (!tracker->netdev_state[1].link_up) |
| 152 | *port2 = 1; |
| 153 | } |
| 154 | } |
| 155 | |
| 156 | static void mlx5_activate_lag(struct mlx5_lag *ldev, |
| 157 | struct lag_tracker *tracker) |
| 158 | { |
| 159 | struct mlx5_core_dev *dev0 = ldev->pf[0].dev; |
| 160 | int err; |
| 161 | |
| 162 | ldev->flags |= MLX5_LAG_FLAG_BONDED; |
| 163 | |
| 164 | mlx5_infer_tx_affinity_mapping(tracker, &ldev->v2p_map[0], |
| 165 | &ldev->v2p_map[1]); |
| 166 | |
| 167 | err = mlx5_cmd_create_lag(dev0, ldev->v2p_map[0], ldev->v2p_map[1]); |
| 168 | if (err) |
| 169 | mlx5_core_err(dev0, |
| 170 | "Failed to create LAG (%d)\n", |
| 171 | err); |
| 172 | } |
| 173 | |
| 174 | static void mlx5_deactivate_lag(struct mlx5_lag *ldev) |
| 175 | { |
| 176 | struct mlx5_core_dev *dev0 = ldev->pf[0].dev; |
| 177 | int err; |
| 178 | |
| 179 | ldev->flags &= ~MLX5_LAG_FLAG_BONDED; |
| 180 | |
| 181 | err = mlx5_cmd_destroy_lag(dev0); |
| 182 | if (err) |
| 183 | mlx5_core_err(dev0, |
| 184 | "Failed to destroy LAG (%d)\n", |
| 185 | err); |
| 186 | } |
| 187 | |
| 188 | static void mlx5_do_bond(struct mlx5_lag *ldev) |
| 189 | { |
| 190 | struct mlx5_core_dev *dev0 = ldev->pf[0].dev; |
| 191 | struct mlx5_core_dev *dev1 = ldev->pf[1].dev; |
| 192 | struct lag_tracker tracker; |
| 193 | u8 v2p_port1, v2p_port2; |
| 194 | int i, err; |
| 195 | |
| 196 | if (!dev0 || !dev1) |
| 197 | return; |
| 198 | |
| 199 | mutex_lock(&lag_mutex); |
| 200 | tracker = ldev->tracker; |
| 201 | mutex_unlock(&lag_mutex); |
| 202 | |
| 203 | if (tracker.is_bonded && !mlx5_lag_is_bonded(ldev)) { |
| 204 | for (i = 0; i < MLX5_MAX_PORTS; i++) |
| 205 | mlx5_remove_dev_by_protocol(ldev->pf[i].dev, |
| 206 | MLX5_INTERFACE_PROTOCOL_IB); |
| 207 | |
| 208 | mlx5_activate_lag(ldev, &tracker); |
| 209 | |
| 210 | mlx5_add_dev_by_protocol(dev0, MLX5_INTERFACE_PROTOCOL_IB); |
| 211 | mlx5_nic_vport_enable_roce(dev1); |
| 212 | } else if (tracker.is_bonded && mlx5_lag_is_bonded(ldev)) { |
| 213 | mlx5_infer_tx_affinity_mapping(&tracker, &v2p_port1, |
| 214 | &v2p_port2); |
| 215 | |
| 216 | if ((v2p_port1 != ldev->v2p_map[0]) || |
| 217 | (v2p_port2 != ldev->v2p_map[1])) { |
| 218 | ldev->v2p_map[0] = v2p_port1; |
| 219 | ldev->v2p_map[1] = v2p_port2; |
| 220 | |
| 221 | err = mlx5_cmd_modify_lag(dev0, v2p_port1, v2p_port2); |
| 222 | if (err) |
| 223 | mlx5_core_err(dev0, |
| 224 | "Failed to modify LAG (%d)\n", |
| 225 | err); |
| 226 | } |
| 227 | } else if (!tracker.is_bonded && mlx5_lag_is_bonded(ldev)) { |
| 228 | mlx5_remove_dev_by_protocol(dev0, MLX5_INTERFACE_PROTOCOL_IB); |
| 229 | mlx5_nic_vport_disable_roce(dev1); |
| 230 | |
| 231 | mlx5_deactivate_lag(ldev); |
| 232 | |
| 233 | for (i = 0; i < MLX5_MAX_PORTS; i++) |
| 234 | if (ldev->pf[i].dev) |
| 235 | mlx5_add_dev_by_protocol(ldev->pf[i].dev, |
| 236 | MLX5_INTERFACE_PROTOCOL_IB); |
| 237 | } |
| 238 | } |
| 239 | |
| 240 | static void mlx5_queue_bond_work(struct mlx5_lag *ldev, unsigned long delay) |
| 241 | { |
| 242 | schedule_delayed_work(&ldev->bond_work, delay); |
| 243 | } |
| 244 | |
| 245 | static void mlx5_do_bond_work(struct work_struct *work) |
| 246 | { |
| 247 | struct delayed_work *delayed_work = to_delayed_work(work); |
| 248 | struct mlx5_lag *ldev = container_of(delayed_work, struct mlx5_lag, |
| 249 | bond_work); |
| 250 | int status; |
| 251 | |
| 252 | status = mutex_trylock(&mlx5_intf_mutex); |
| 253 | if (!status) { |
| 254 | /* 1 sec delay. */ |
| 255 | mlx5_queue_bond_work(ldev, HZ); |
| 256 | return; |
| 257 | } |
| 258 | |
| 259 | mlx5_do_bond(ldev); |
| 260 | mutex_unlock(&mlx5_intf_mutex); |
| 261 | } |
| 262 | |
| 263 | static int mlx5_handle_changeupper_event(struct mlx5_lag *ldev, |
| 264 | struct lag_tracker *tracker, |
| 265 | struct net_device *ndev, |
| 266 | struct netdev_notifier_changeupper_info *info) |
| 267 | { |
| 268 | struct net_device *upper = info->upper_dev, *ndev_tmp; |
| 269 | struct netdev_lag_upper_info *lag_upper_info; |
| 270 | bool is_bonded; |
| 271 | int bond_status = 0; |
| 272 | int num_slaves = 0; |
| 273 | int idx; |
| 274 | |
| 275 | if (!netif_is_lag_master(upper)) |
| 276 | return 0; |
| 277 | |
| 278 | lag_upper_info = info->upper_info; |
| 279 | |
| 280 | /* The event may still be of interest if the slave does not belong to |
| 281 | * us, but is enslaved to a master which has one or more of our netdevs |
| 282 | * as slaves (e.g., if a new slave is added to a master that bonds two |
| 283 | * of our netdevs, we should unbond). |
| 284 | */ |
| 285 | rcu_read_lock(); |
| 286 | for_each_netdev_in_bond_rcu(upper, ndev_tmp) { |
| 287 | idx = mlx5_lag_dev_get_netdev_idx(ldev, ndev_tmp); |
| 288 | if (idx > -1) |
| 289 | bond_status |= (1 << idx); |
| 290 | |
| 291 | num_slaves++; |
| 292 | } |
| 293 | rcu_read_unlock(); |
| 294 | |
| 295 | /* None of this lagdev's netdevs are slaves of this master. */ |
| 296 | if (!(bond_status & 0x3)) |
| 297 | return 0; |
| 298 | |
| 299 | if (lag_upper_info) |
| 300 | tracker->tx_type = lag_upper_info->tx_type; |
| 301 | |
| 302 | /* Determine bonding status: |
| 303 | * A device is considered bonded if both its physical ports are slaves |
| 304 | * of the same lag master, and only them. |
| 305 | * Lag mode must be activebackup or hash. |
| 306 | */ |
| 307 | is_bonded = (num_slaves == MLX5_MAX_PORTS) && |
| 308 | (bond_status == 0x3) && |
| 309 | ((tracker->tx_type == NETDEV_LAG_TX_TYPE_ACTIVEBACKUP) || |
| 310 | (tracker->tx_type == NETDEV_LAG_TX_TYPE_HASH)); |
| 311 | |
| 312 | if (tracker->is_bonded != is_bonded) { |
| 313 | tracker->is_bonded = is_bonded; |
| 314 | return 1; |
| 315 | } |
| 316 | |
| 317 | return 0; |
| 318 | } |
| 319 | |
| 320 | static int mlx5_handle_changelowerstate_event(struct mlx5_lag *ldev, |
| 321 | struct lag_tracker *tracker, |
| 322 | struct net_device *ndev, |
| 323 | struct netdev_notifier_changelowerstate_info *info) |
| 324 | { |
| 325 | struct netdev_lag_lower_state_info *lag_lower_info; |
| 326 | int idx; |
| 327 | |
| 328 | if (!netif_is_lag_port(ndev)) |
| 329 | return 0; |
| 330 | |
| 331 | idx = mlx5_lag_dev_get_netdev_idx(ldev, ndev); |
| 332 | if (idx == -1) |
| 333 | return 0; |
| 334 | |
| 335 | /* This information is used to determine virtual to physical |
| 336 | * port mapping. |
| 337 | */ |
| 338 | lag_lower_info = info->lower_state_info; |
| 339 | if (!lag_lower_info) |
| 340 | return 0; |
| 341 | |
| 342 | tracker->netdev_state[idx] = *lag_lower_info; |
| 343 | |
| 344 | return 1; |
| 345 | } |
| 346 | |
| 347 | static int mlx5_lag_netdev_event(struct notifier_block *this, |
| 348 | unsigned long event, void *ptr) |
| 349 | { |
| 350 | struct net_device *ndev = netdev_notifier_info_to_dev(ptr); |
| 351 | struct lag_tracker tracker; |
| 352 | struct mlx5_lag *ldev; |
| 353 | int changed = 0; |
| 354 | |
| 355 | if (!net_eq(dev_net(ndev), &init_net)) |
| 356 | return NOTIFY_DONE; |
| 357 | |
| 358 | if ((event != NETDEV_CHANGEUPPER) && (event != NETDEV_CHANGELOWERSTATE)) |
| 359 | return NOTIFY_DONE; |
| 360 | |
| 361 | ldev = container_of(this, struct mlx5_lag, nb); |
| 362 | tracker = ldev->tracker; |
| 363 | |
| 364 | switch (event) { |
| 365 | case NETDEV_CHANGEUPPER: |
| 366 | changed = mlx5_handle_changeupper_event(ldev, &tracker, ndev, |
| 367 | ptr); |
| 368 | break; |
| 369 | case NETDEV_CHANGELOWERSTATE: |
| 370 | changed = mlx5_handle_changelowerstate_event(ldev, &tracker, |
| 371 | ndev, ptr); |
| 372 | break; |
| 373 | } |
| 374 | |
| 375 | mutex_lock(&lag_mutex); |
| 376 | ldev->tracker = tracker; |
| 377 | mutex_unlock(&lag_mutex); |
| 378 | |
| 379 | if (changed) |
| 380 | mlx5_queue_bond_work(ldev, 0); |
| 381 | |
| 382 | return NOTIFY_DONE; |
| 383 | } |
| 384 | |
| 385 | static struct mlx5_lag *mlx5_lag_dev_alloc(void) |
| 386 | { |
| 387 | struct mlx5_lag *ldev; |
| 388 | |
| 389 | ldev = kzalloc(sizeof(*ldev), GFP_KERNEL); |
| 390 | if (!ldev) |
| 391 | return NULL; |
| 392 | |
| 393 | INIT_DELAYED_WORK(&ldev->bond_work, mlx5_do_bond_work); |
| 394 | |
| 395 | return ldev; |
| 396 | } |
| 397 | |
| 398 | static void mlx5_lag_dev_free(struct mlx5_lag *ldev) |
| 399 | { |
| 400 | kfree(ldev); |
| 401 | } |
| 402 | |
| 403 | static void mlx5_lag_dev_add_pf(struct mlx5_lag *ldev, |
| 404 | struct mlx5_core_dev *dev, |
| 405 | struct net_device *netdev) |
| 406 | { |
| 407 | unsigned int fn = PCI_FUNC(dev->pdev->devfn); |
| 408 | |
| 409 | if (fn >= MLX5_MAX_PORTS) |
| 410 | return; |
| 411 | |
| 412 | mutex_lock(&lag_mutex); |
| 413 | ldev->pf[fn].dev = dev; |
| 414 | ldev->pf[fn].netdev = netdev; |
| 415 | ldev->tracker.netdev_state[fn].link_up = 0; |
| 416 | ldev->tracker.netdev_state[fn].tx_enabled = 0; |
| 417 | |
| 418 | dev->priv.lag = ldev; |
| 419 | mutex_unlock(&lag_mutex); |
| 420 | } |
| 421 | |
| 422 | static void mlx5_lag_dev_remove_pf(struct mlx5_lag *ldev, |
| 423 | struct mlx5_core_dev *dev) |
| 424 | { |
| 425 | int i; |
| 426 | |
| 427 | for (i = 0; i < MLX5_MAX_PORTS; i++) |
| 428 | if (ldev->pf[i].dev == dev) |
| 429 | break; |
| 430 | |
| 431 | if (i == MLX5_MAX_PORTS) |
| 432 | return; |
| 433 | |
| 434 | mutex_lock(&lag_mutex); |
| 435 | memset(&ldev->pf[i], 0, sizeof(*ldev->pf)); |
| 436 | |
| 437 | dev->priv.lag = NULL; |
| 438 | mutex_unlock(&lag_mutex); |
| 439 | } |
| 440 | |
| 441 | static u16 mlx5_gen_pci_id(struct mlx5_core_dev *dev) |
| 442 | { |
| 443 | return (u16)((dev->pdev->bus->number << 8) | |
| 444 | PCI_SLOT(dev->pdev->devfn)); |
| 445 | } |
| 446 | |
| 447 | /* Must be called with intf_mutex held */ |
| 448 | void mlx5_lag_add(struct mlx5_core_dev *dev, struct net_device *netdev) |
| 449 | { |
| 450 | struct mlx5_lag *ldev = NULL; |
| 451 | struct mlx5_core_dev *tmp_dev; |
| 452 | struct mlx5_priv *priv; |
| 453 | u16 pci_id; |
| 454 | |
| 455 | if (!MLX5_CAP_GEN(dev, vport_group_manager) || |
| 456 | !MLX5_CAP_GEN(dev, lag_master) || |
| 457 | (MLX5_CAP_GEN(dev, num_lag_ports) != MLX5_MAX_PORTS)) |
| 458 | return; |
| 459 | |
| 460 | pci_id = mlx5_gen_pci_id(dev); |
| 461 | |
| 462 | mlx5_core_for_each_priv(priv) { |
| 463 | tmp_dev = container_of(priv, struct mlx5_core_dev, priv); |
| 464 | if ((dev != tmp_dev) && |
| 465 | (mlx5_gen_pci_id(tmp_dev) == pci_id)) { |
| 466 | ldev = tmp_dev->priv.lag; |
| 467 | break; |
| 468 | } |
| 469 | } |
| 470 | |
| 471 | if (!ldev) { |
| 472 | ldev = mlx5_lag_dev_alloc(); |
| 473 | if (!ldev) { |
| 474 | mlx5_core_err(dev, "Failed to alloc lag dev\n"); |
| 475 | return; |
| 476 | } |
| 477 | } |
| 478 | |
| 479 | mlx5_lag_dev_add_pf(ldev, dev, netdev); |
| 480 | |
| 481 | if (!ldev->nb.notifier_call) { |
| 482 | ldev->nb.notifier_call = mlx5_lag_netdev_event; |
| 483 | if (register_netdevice_notifier(&ldev->nb)) { |
| 484 | ldev->nb.notifier_call = NULL; |
| 485 | mlx5_core_err(dev, "Failed to register LAG netdev notifier\n"); |
| 486 | } |
| 487 | } |
| 488 | } |
| 489 | |
| 490 | /* Must be called with intf_mutex held */ |
| 491 | void mlx5_lag_remove(struct mlx5_core_dev *dev) |
| 492 | { |
| 493 | struct mlx5_lag *ldev; |
| 494 | int i; |
| 495 | |
| 496 | ldev = mlx5_lag_dev_get(dev); |
| 497 | if (!ldev) |
| 498 | return; |
| 499 | |
| 500 | if (mlx5_lag_is_bonded(ldev)) |
| 501 | mlx5_deactivate_lag(ldev); |
| 502 | |
| 503 | mlx5_lag_dev_remove_pf(ldev, dev); |
| 504 | |
| 505 | for (i = 0; i < MLX5_MAX_PORTS; i++) |
| 506 | if (ldev->pf[i].dev) |
| 507 | break; |
| 508 | |
| 509 | if (i == MLX5_MAX_PORTS) { |
| 510 | if (ldev->nb.notifier_call) |
| 511 | unregister_netdevice_notifier(&ldev->nb); |
| 512 | cancel_delayed_work_sync(&ldev->bond_work); |
| 513 | mlx5_lag_dev_free(ldev); |
| 514 | } |
| 515 | } |
| 516 | |
| 517 | bool mlx5_lag_is_active(struct mlx5_core_dev *dev) |
| 518 | { |
| 519 | struct mlx5_lag *ldev; |
| 520 | bool res; |
| 521 | |
| 522 | mutex_lock(&lag_mutex); |
| 523 | ldev = mlx5_lag_dev_get(dev); |
| 524 | res = ldev && mlx5_lag_is_bonded(ldev); |
| 525 | mutex_unlock(&lag_mutex); |
| 526 | |
| 527 | return res; |
| 528 | } |
| 529 | EXPORT_SYMBOL(mlx5_lag_is_active); |
| 530 | |
Aviv Heller | 6a32047 | 2016-05-09 11:06:44 +0000 | [diff] [blame^] | 531 | struct net_device *mlx5_lag_get_roce_netdev(struct mlx5_core_dev *dev) |
| 532 | { |
| 533 | struct net_device *ndev = NULL; |
| 534 | struct mlx5_lag *ldev; |
| 535 | |
| 536 | mutex_lock(&lag_mutex); |
| 537 | ldev = mlx5_lag_dev_get(dev); |
| 538 | |
| 539 | if (!(ldev && mlx5_lag_is_bonded(ldev))) |
| 540 | goto unlock; |
| 541 | |
| 542 | if (ldev->tracker.tx_type == NETDEV_LAG_TX_TYPE_ACTIVEBACKUP) { |
| 543 | ndev = ldev->tracker.netdev_state[0].tx_enabled ? |
| 544 | ldev->pf[0].netdev : ldev->pf[1].netdev; |
| 545 | } else { |
| 546 | ndev = ldev->pf[0].netdev; |
| 547 | } |
| 548 | if (ndev) |
| 549 | dev_hold(ndev); |
| 550 | |
| 551 | unlock: |
| 552 | mutex_unlock(&lag_mutex); |
| 553 | |
| 554 | return ndev; |
| 555 | } |
| 556 | EXPORT_SYMBOL(mlx5_lag_get_roce_netdev); |
| 557 | |