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0001 /*
0002  * Copyright (c) 2013-2015, Mellanox Technologies. All rights reserved.
0003  *
0004  * This software is available to you under a choice of one of two
0005  * licenses.  You may choose to be licensed under the terms of the GNU
0006  * General Public License (GPL) Version 2, available from the file
0007  * COPYING in the main directory of this source tree, or the
0008  * OpenIB.org BSD license below:
0009  *
0010  *     Redistribution and use in source and binary forms, with or
0011  *     without modification, are permitted provided that the following
0012  *     conditions are met:
0013  *
0014  *      - Redistributions of source code must retain the above
0015  *        copyright notice, this list of conditions and the following
0016  *        disclaimer.
0017  *
0018  *      - Redistributions in binary form must reproduce the above
0019  *        copyright notice, this list of conditions and the following
0020  *        disclaimer in the documentation and/or other materials
0021  *        provided with the distribution.
0022  *
0023  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
0024  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
0025  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
0026  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
0027  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
0028  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
0029  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
0030  * SOFTWARE.
0031  */
0032 
0033 #include <linux/mlx5/driver.h>
0034 #include <linux/mlx5/eswitch.h>
0035 #include <linux/mlx5/mlx5_ifc_vdpa.h>
0036 #include <linux/mlx5/vport.h>
0037 #include "mlx5_core.h"
0038 
0039 /* intf dev list mutex */
0040 static DEFINE_MUTEX(mlx5_intf_mutex);
0041 static DEFINE_IDA(mlx5_adev_ida);
0042 
0043 static bool is_eth_rep_supported(struct mlx5_core_dev *dev)
0044 {
0045     if (!IS_ENABLED(CONFIG_MLX5_ESWITCH))
0046         return false;
0047 
0048     if (!MLX5_ESWITCH_MANAGER(dev))
0049         return false;
0050 
0051     if (!is_mdev_switchdev_mode(dev))
0052         return false;
0053 
0054     return true;
0055 }
0056 
0057 bool mlx5_eth_supported(struct mlx5_core_dev *dev)
0058 {
0059     if (!IS_ENABLED(CONFIG_MLX5_CORE_EN))
0060         return false;
0061 
0062     if (MLX5_CAP_GEN(dev, port_type) != MLX5_CAP_PORT_TYPE_ETH)
0063         return false;
0064 
0065     if (!MLX5_CAP_GEN(dev, eth_net_offloads)) {
0066         mlx5_core_warn(dev, "Missing eth_net_offloads capability\n");
0067         return false;
0068     }
0069 
0070     if (!MLX5_CAP_GEN(dev, nic_flow_table)) {
0071         mlx5_core_warn(dev, "Missing nic_flow_table capability\n");
0072         return false;
0073     }
0074 
0075     if (!MLX5_CAP_ETH(dev, csum_cap)) {
0076         mlx5_core_warn(dev, "Missing csum_cap capability\n");
0077         return false;
0078     }
0079 
0080     if (!MLX5_CAP_ETH(dev, max_lso_cap)) {
0081         mlx5_core_warn(dev, "Missing max_lso_cap capability\n");
0082         return false;
0083     }
0084 
0085     if (!MLX5_CAP_ETH(dev, vlan_cap)) {
0086         mlx5_core_warn(dev, "Missing vlan_cap capability\n");
0087         return false;
0088     }
0089 
0090     if (!MLX5_CAP_ETH(dev, rss_ind_tbl_cap)) {
0091         mlx5_core_warn(dev, "Missing rss_ind_tbl_cap capability\n");
0092         return false;
0093     }
0094 
0095     if (MLX5_CAP_FLOWTABLE(dev,
0096                    flow_table_properties_nic_receive.max_ft_level) < 3) {
0097         mlx5_core_warn(dev, "max_ft_level < 3\n");
0098         return false;
0099     }
0100 
0101     if (!MLX5_CAP_ETH(dev, self_lb_en_modifiable))
0102         mlx5_core_warn(dev, "Self loop back prevention is not supported\n");
0103     if (!MLX5_CAP_GEN(dev, cq_moderation))
0104         mlx5_core_warn(dev, "CQ moderation is not supported\n");
0105 
0106     return true;
0107 }
0108 
0109 static bool is_eth_enabled(struct mlx5_core_dev *dev)
0110 {
0111     union devlink_param_value val;
0112     int err;
0113 
0114     err = devlink_param_driverinit_value_get(priv_to_devlink(dev),
0115                          DEVLINK_PARAM_GENERIC_ID_ENABLE_ETH,
0116                          &val);
0117     return err ? false : val.vbool;
0118 }
0119 
0120 bool mlx5_vnet_supported(struct mlx5_core_dev *dev)
0121 {
0122     if (!IS_ENABLED(CONFIG_MLX5_VDPA_NET))
0123         return false;
0124 
0125     if (mlx5_core_is_pf(dev))
0126         return false;
0127 
0128     if (!(MLX5_CAP_GEN_64(dev, general_obj_types) &
0129           MLX5_GENERAL_OBJ_TYPES_CAP_VIRTIO_NET_Q))
0130         return false;
0131 
0132     if (!(MLX5_CAP_DEV_VDPA_EMULATION(dev, event_mode) &
0133           MLX5_VIRTIO_Q_EVENT_MODE_QP_MODE))
0134         return false;
0135 
0136     if (!MLX5_CAP_DEV_VDPA_EMULATION(dev, eth_frame_offload_type))
0137         return false;
0138 
0139     return true;
0140 }
0141 
0142 static bool is_vnet_enabled(struct mlx5_core_dev *dev)
0143 {
0144     union devlink_param_value val;
0145     int err;
0146 
0147     err = devlink_param_driverinit_value_get(priv_to_devlink(dev),
0148                          DEVLINK_PARAM_GENERIC_ID_ENABLE_VNET,
0149                          &val);
0150     return err ? false : val.vbool;
0151 }
0152 
0153 static bool is_ib_rep_supported(struct mlx5_core_dev *dev)
0154 {
0155     if (!IS_ENABLED(CONFIG_MLX5_INFINIBAND))
0156         return false;
0157 
0158     if (dev->priv.flags & MLX5_PRIV_FLAGS_DISABLE_IB_ADEV)
0159         return false;
0160 
0161     if (!is_eth_rep_supported(dev))
0162         return false;
0163 
0164     if (!MLX5_ESWITCH_MANAGER(dev))
0165         return false;
0166 
0167     if (!is_mdev_switchdev_mode(dev))
0168         return false;
0169 
0170     if (mlx5_core_mp_enabled(dev))
0171         return false;
0172 
0173     return true;
0174 }
0175 
0176 static bool is_mp_supported(struct mlx5_core_dev *dev)
0177 {
0178     if (!IS_ENABLED(CONFIG_MLX5_INFINIBAND))
0179         return false;
0180 
0181     if (dev->priv.flags & MLX5_PRIV_FLAGS_DISABLE_IB_ADEV)
0182         return false;
0183 
0184     if (is_ib_rep_supported(dev))
0185         return false;
0186 
0187     if (MLX5_CAP_GEN(dev, port_type) != MLX5_CAP_PORT_TYPE_ETH)
0188         return false;
0189 
0190     if (!mlx5_core_is_mp_slave(dev))
0191         return false;
0192 
0193     return true;
0194 }
0195 
0196 bool mlx5_rdma_supported(struct mlx5_core_dev *dev)
0197 {
0198     if (!IS_ENABLED(CONFIG_MLX5_INFINIBAND))
0199         return false;
0200 
0201     if (dev->priv.flags & MLX5_PRIV_FLAGS_DISABLE_IB_ADEV)
0202         return false;
0203 
0204     if (is_ib_rep_supported(dev))
0205         return false;
0206 
0207     if (is_mp_supported(dev))
0208         return false;
0209 
0210     return true;
0211 }
0212 
0213 static bool is_ib_enabled(struct mlx5_core_dev *dev)
0214 {
0215     union devlink_param_value val;
0216     int err;
0217 
0218     err = devlink_param_driverinit_value_get(priv_to_devlink(dev),
0219                          DEVLINK_PARAM_GENERIC_ID_ENABLE_RDMA,
0220                          &val);
0221     return err ? false : val.vbool;
0222 }
0223 
0224 enum {
0225     MLX5_INTERFACE_PROTOCOL_ETH,
0226     MLX5_INTERFACE_PROTOCOL_ETH_REP,
0227 
0228     MLX5_INTERFACE_PROTOCOL_IB,
0229     MLX5_INTERFACE_PROTOCOL_IB_REP,
0230     MLX5_INTERFACE_PROTOCOL_MPIB,
0231 
0232     MLX5_INTERFACE_PROTOCOL_VNET,
0233 };
0234 
0235 static const struct mlx5_adev_device {
0236     const char *suffix;
0237     bool (*is_supported)(struct mlx5_core_dev *dev);
0238     bool (*is_enabled)(struct mlx5_core_dev *dev);
0239 } mlx5_adev_devices[] = {
0240     [MLX5_INTERFACE_PROTOCOL_VNET] = { .suffix = "vnet",
0241                        .is_supported = &mlx5_vnet_supported,
0242                        .is_enabled = &is_vnet_enabled },
0243     [MLX5_INTERFACE_PROTOCOL_IB] = { .suffix = "rdma",
0244                      .is_supported = &mlx5_rdma_supported,
0245                      .is_enabled = &is_ib_enabled },
0246     [MLX5_INTERFACE_PROTOCOL_ETH] = { .suffix = "eth",
0247                       .is_supported = &mlx5_eth_supported,
0248                       .is_enabled = &is_eth_enabled },
0249     [MLX5_INTERFACE_PROTOCOL_ETH_REP] = { .suffix = "eth-rep",
0250                        .is_supported = &is_eth_rep_supported },
0251     [MLX5_INTERFACE_PROTOCOL_IB_REP] = { .suffix = "rdma-rep",
0252                        .is_supported = &is_ib_rep_supported },
0253     [MLX5_INTERFACE_PROTOCOL_MPIB] = { .suffix = "multiport",
0254                        .is_supported = &is_mp_supported },
0255 };
0256 
0257 int mlx5_adev_idx_alloc(void)
0258 {
0259     return ida_alloc(&mlx5_adev_ida, GFP_KERNEL);
0260 }
0261 
0262 void mlx5_adev_idx_free(int idx)
0263 {
0264     ida_free(&mlx5_adev_ida, idx);
0265 }
0266 
0267 int mlx5_adev_init(struct mlx5_core_dev *dev)
0268 {
0269     struct mlx5_priv *priv = &dev->priv;
0270 
0271     priv->adev = kcalloc(ARRAY_SIZE(mlx5_adev_devices),
0272                  sizeof(struct mlx5_adev *), GFP_KERNEL);
0273     if (!priv->adev)
0274         return -ENOMEM;
0275 
0276     return 0;
0277 }
0278 
0279 void mlx5_adev_cleanup(struct mlx5_core_dev *dev)
0280 {
0281     struct mlx5_priv *priv = &dev->priv;
0282 
0283     kfree(priv->adev);
0284 }
0285 
0286 static void adev_release(struct device *dev)
0287 {
0288     struct mlx5_adev *mlx5_adev =
0289         container_of(dev, struct mlx5_adev, adev.dev);
0290     struct mlx5_priv *priv = &mlx5_adev->mdev->priv;
0291     int idx = mlx5_adev->idx;
0292 
0293     kfree(mlx5_adev);
0294     priv->adev[idx] = NULL;
0295 }
0296 
0297 static struct mlx5_adev *add_adev(struct mlx5_core_dev *dev, int idx)
0298 {
0299     const char *suffix = mlx5_adev_devices[idx].suffix;
0300     struct auxiliary_device *adev;
0301     struct mlx5_adev *madev;
0302     int ret;
0303 
0304     madev = kzalloc(sizeof(*madev), GFP_KERNEL);
0305     if (!madev)
0306         return ERR_PTR(-ENOMEM);
0307 
0308     adev = &madev->adev;
0309     adev->id = dev->priv.adev_idx;
0310     adev->name = suffix;
0311     adev->dev.parent = dev->device;
0312     adev->dev.release = adev_release;
0313     madev->mdev = dev;
0314     madev->idx = idx;
0315 
0316     ret = auxiliary_device_init(adev);
0317     if (ret) {
0318         kfree(madev);
0319         return ERR_PTR(ret);
0320     }
0321 
0322     ret = auxiliary_device_add(adev);
0323     if (ret) {
0324         auxiliary_device_uninit(adev);
0325         return ERR_PTR(ret);
0326     }
0327     return madev;
0328 }
0329 
0330 static void del_adev(struct auxiliary_device *adev)
0331 {
0332     auxiliary_device_delete(adev);
0333     auxiliary_device_uninit(adev);
0334 }
0335 
0336 int mlx5_attach_device(struct mlx5_core_dev *dev)
0337 {
0338     struct mlx5_priv *priv = &dev->priv;
0339     struct auxiliary_device *adev;
0340     struct auxiliary_driver *adrv;
0341     int ret = 0, i;
0342 
0343     devl_assert_locked(priv_to_devlink(dev));
0344     mutex_lock(&mlx5_intf_mutex);
0345     priv->flags &= ~MLX5_PRIV_FLAGS_DETACH;
0346     priv->flags |= MLX5_PRIV_FLAGS_MLX5E_LOCKED_FLOW;
0347     for (i = 0; i < ARRAY_SIZE(mlx5_adev_devices); i++) {
0348         if (!priv->adev[i]) {
0349             bool is_supported = false;
0350 
0351             if (mlx5_adev_devices[i].is_enabled) {
0352                 bool enabled;
0353 
0354                 enabled = mlx5_adev_devices[i].is_enabled(dev);
0355                 if (!enabled)
0356                     continue;
0357             }
0358 
0359             if (mlx5_adev_devices[i].is_supported)
0360                 is_supported = mlx5_adev_devices[i].is_supported(dev);
0361 
0362             if (!is_supported)
0363                 continue;
0364 
0365             priv->adev[i] = add_adev(dev, i);
0366             if (IS_ERR(priv->adev[i])) {
0367                 ret = PTR_ERR(priv->adev[i]);
0368                 priv->adev[i] = NULL;
0369             }
0370         } else {
0371             adev = &priv->adev[i]->adev;
0372 
0373             /* Pay attention that this is not PCI driver that
0374              * mlx5_core_dev is connected, but auxiliary driver.
0375              *
0376              * Here we can race of module unload with devlink
0377              * reload, but we don't need to take extra lock because
0378              * we are holding global mlx5_intf_mutex.
0379              */
0380             if (!adev->dev.driver)
0381                 continue;
0382             adrv = to_auxiliary_drv(adev->dev.driver);
0383 
0384             if (adrv->resume)
0385                 ret = adrv->resume(adev);
0386         }
0387         if (ret) {
0388             mlx5_core_warn(dev, "Device[%d] (%s) failed to load\n",
0389                        i, mlx5_adev_devices[i].suffix);
0390 
0391             break;
0392         }
0393     }
0394     priv->flags &= ~MLX5_PRIV_FLAGS_MLX5E_LOCKED_FLOW;
0395     mutex_unlock(&mlx5_intf_mutex);
0396     return ret;
0397 }
0398 
0399 void mlx5_detach_device(struct mlx5_core_dev *dev)
0400 {
0401     struct mlx5_priv *priv = &dev->priv;
0402     struct auxiliary_device *adev;
0403     struct auxiliary_driver *adrv;
0404     pm_message_t pm = {};
0405     int i;
0406 
0407     devl_assert_locked(priv_to_devlink(dev));
0408     mutex_lock(&mlx5_intf_mutex);
0409     priv->flags |= MLX5_PRIV_FLAGS_MLX5E_LOCKED_FLOW;
0410     for (i = ARRAY_SIZE(mlx5_adev_devices) - 1; i >= 0; i--) {
0411         if (!priv->adev[i])
0412             continue;
0413 
0414         if (mlx5_adev_devices[i].is_enabled) {
0415             bool enabled;
0416 
0417             enabled = mlx5_adev_devices[i].is_enabled(dev);
0418             if (!enabled)
0419                 goto skip_suspend;
0420         }
0421 
0422         adev = &priv->adev[i]->adev;
0423         /* Auxiliary driver was unbind manually through sysfs */
0424         if (!adev->dev.driver)
0425             goto skip_suspend;
0426 
0427         adrv = to_auxiliary_drv(adev->dev.driver);
0428 
0429         if (adrv->suspend) {
0430             adrv->suspend(adev, pm);
0431             continue;
0432         }
0433 
0434 skip_suspend:
0435         del_adev(&priv->adev[i]->adev);
0436         priv->adev[i] = NULL;
0437     }
0438     priv->flags &= ~MLX5_PRIV_FLAGS_MLX5E_LOCKED_FLOW;
0439     priv->flags |= MLX5_PRIV_FLAGS_DETACH;
0440     mutex_unlock(&mlx5_intf_mutex);
0441 }
0442 
0443 int mlx5_register_device(struct mlx5_core_dev *dev)
0444 {
0445     int ret;
0446 
0447     devl_assert_locked(priv_to_devlink(dev));
0448     mutex_lock(&mlx5_intf_mutex);
0449     dev->priv.flags &= ~MLX5_PRIV_FLAGS_DISABLE_ALL_ADEV;
0450     ret = mlx5_rescan_drivers_locked(dev);
0451     mutex_unlock(&mlx5_intf_mutex);
0452     if (ret)
0453         mlx5_unregister_device(dev);
0454 
0455     return ret;
0456 }
0457 
0458 void mlx5_unregister_device(struct mlx5_core_dev *dev)
0459 {
0460     devl_assert_locked(priv_to_devlink(dev));
0461     mutex_lock(&mlx5_intf_mutex);
0462     dev->priv.flags = MLX5_PRIV_FLAGS_DISABLE_ALL_ADEV;
0463     mlx5_rescan_drivers_locked(dev);
0464     mutex_unlock(&mlx5_intf_mutex);
0465 }
0466 
0467 static int add_drivers(struct mlx5_core_dev *dev)
0468 {
0469     struct mlx5_priv *priv = &dev->priv;
0470     int i, ret = 0;
0471 
0472     for (i = 0; i < ARRAY_SIZE(mlx5_adev_devices); i++) {
0473         bool is_supported = false;
0474 
0475         if (priv->adev[i])
0476             continue;
0477 
0478         if (mlx5_adev_devices[i].is_supported)
0479             is_supported = mlx5_adev_devices[i].is_supported(dev);
0480 
0481         if (!is_supported)
0482             continue;
0483 
0484         priv->adev[i] = add_adev(dev, i);
0485         if (IS_ERR(priv->adev[i])) {
0486             mlx5_core_warn(dev, "Device[%d] (%s) failed to load\n",
0487                        i, mlx5_adev_devices[i].suffix);
0488             /* We continue to rescan drivers and leave to the caller
0489              * to make decision if to release everything or continue.
0490              */
0491             ret = PTR_ERR(priv->adev[i]);
0492             priv->adev[i] = NULL;
0493         }
0494     }
0495     return ret;
0496 }
0497 
0498 static void delete_drivers(struct mlx5_core_dev *dev)
0499 {
0500     struct mlx5_priv *priv = &dev->priv;
0501     bool delete_all;
0502     int i;
0503 
0504     delete_all = priv->flags & MLX5_PRIV_FLAGS_DISABLE_ALL_ADEV;
0505 
0506     for (i = ARRAY_SIZE(mlx5_adev_devices) - 1; i >= 0; i--) {
0507         bool is_supported = false;
0508 
0509         if (!priv->adev[i])
0510             continue;
0511 
0512         if (mlx5_adev_devices[i].is_enabled) {
0513             bool enabled;
0514 
0515             enabled = mlx5_adev_devices[i].is_enabled(dev);
0516             if (!enabled)
0517                 goto del_adev;
0518         }
0519 
0520         if (mlx5_adev_devices[i].is_supported && !delete_all)
0521             is_supported = mlx5_adev_devices[i].is_supported(dev);
0522 
0523         if (is_supported)
0524             continue;
0525 
0526 del_adev:
0527         del_adev(&priv->adev[i]->adev);
0528         priv->adev[i] = NULL;
0529     }
0530 }
0531 
0532 /* This function is used after mlx5_core_dev is reconfigured.
0533  */
0534 int mlx5_rescan_drivers_locked(struct mlx5_core_dev *dev)
0535 {
0536     struct mlx5_priv *priv = &dev->priv;
0537     int err = 0;
0538 
0539     lockdep_assert_held(&mlx5_intf_mutex);
0540     if (priv->flags & MLX5_PRIV_FLAGS_DETACH)
0541         return 0;
0542 
0543     priv->flags |= MLX5_PRIV_FLAGS_MLX5E_LOCKED_FLOW;
0544     delete_drivers(dev);
0545     if (priv->flags & MLX5_PRIV_FLAGS_DISABLE_ALL_ADEV)
0546         goto out;
0547 
0548     err = add_drivers(dev);
0549 
0550 out:
0551     priv->flags &= ~MLX5_PRIV_FLAGS_MLX5E_LOCKED_FLOW;
0552     return err;
0553 }
0554 
0555 bool mlx5_same_hw_devs(struct mlx5_core_dev *dev, struct mlx5_core_dev *peer_dev)
0556 {
0557     u64 fsystem_guid, psystem_guid;
0558 
0559     fsystem_guid = mlx5_query_nic_system_image_guid(dev);
0560     psystem_guid = mlx5_query_nic_system_image_guid(peer_dev);
0561 
0562     return (fsystem_guid && psystem_guid && fsystem_guid == psystem_guid);
0563 }
0564 
0565 static u32 mlx5_gen_pci_id(const struct mlx5_core_dev *dev)
0566 {
0567     return (u32)((pci_domain_nr(dev->pdev->bus) << 16) |
0568              (dev->pdev->bus->number << 8) |
0569              PCI_SLOT(dev->pdev->devfn));
0570 }
0571 
0572 static int _next_phys_dev(struct mlx5_core_dev *mdev,
0573               const struct mlx5_core_dev *curr)
0574 {
0575     if (!mlx5_core_is_pf(mdev))
0576         return 0;
0577 
0578     if (mdev == curr)
0579         return 0;
0580 
0581     if (!mlx5_same_hw_devs(mdev, (struct mlx5_core_dev *)curr) &&
0582         mlx5_gen_pci_id(mdev) != mlx5_gen_pci_id(curr))
0583         return 0;
0584 
0585     return 1;
0586 }
0587 
0588 static void *pci_get_other_drvdata(struct device *this, struct device *other)
0589 {
0590     if (this->driver != other->driver)
0591         return NULL;
0592 
0593     return pci_get_drvdata(to_pci_dev(other));
0594 }
0595 
0596 static int next_phys_dev_lag(struct device *dev, const void *data)
0597 {
0598     struct mlx5_core_dev *mdev, *this = (struct mlx5_core_dev *)data;
0599 
0600     mdev = pci_get_other_drvdata(this->device, dev);
0601     if (!mdev)
0602         return 0;
0603 
0604     if (!MLX5_CAP_GEN(mdev, vport_group_manager) ||
0605         !MLX5_CAP_GEN(mdev, lag_master) ||
0606         (MLX5_CAP_GEN(mdev, num_lag_ports) > MLX5_MAX_PORTS ||
0607          MLX5_CAP_GEN(mdev, num_lag_ports) <= 1))
0608         return 0;
0609 
0610     return _next_phys_dev(mdev, data);
0611 }
0612 
0613 static struct mlx5_core_dev *mlx5_get_next_dev(struct mlx5_core_dev *dev,
0614                            int (*match)(struct device *dev, const void *data))
0615 {
0616     struct device *next;
0617 
0618     if (!mlx5_core_is_pf(dev))
0619         return NULL;
0620 
0621     next = bus_find_device(&pci_bus_type, NULL, dev, match);
0622     if (!next)
0623         return NULL;
0624 
0625     put_device(next);
0626     return pci_get_drvdata(to_pci_dev(next));
0627 }
0628 
0629 /* Must be called with intf_mutex held */
0630 struct mlx5_core_dev *mlx5_get_next_phys_dev_lag(struct mlx5_core_dev *dev)
0631 {
0632     lockdep_assert_held(&mlx5_intf_mutex);
0633     return mlx5_get_next_dev(dev, &next_phys_dev_lag);
0634 }
0635 
0636 void mlx5_dev_list_lock(void)
0637 {
0638     mutex_lock(&mlx5_intf_mutex);
0639 }
0640 void mlx5_dev_list_unlock(void)
0641 {
0642     mutex_unlock(&mlx5_intf_mutex);
0643 }
0644 
0645 int mlx5_dev_list_trylock(void)
0646 {
0647     return mutex_trylock(&mlx5_intf_mutex);
0648 }
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