drivers/net/ethernet/mellanox/mlx5/core/dev.c

   1 /*
   2  * Copyright (c) 2013-2015, 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/mlx5/driver.h>
  34 #include <linux/mlx5/eswitch.h>
  35 #include <linux/mlx5/mlx5_ifc_vdpa.h>
  36 #include <linux/mlx5/vport.h>
  37 #include "mlx5_core.h"
  38 #include "devlink.h"
  39 #include "lag/lag.h"
  40
  41 static DEFINE_IDA(mlx5_adev_ida);
  42
  43 static bool is_eth_rep_supported(struct mlx5_core_dev *dev)
  44 {
  45         if (!IS_ENABLED(CONFIG_MLX5_ESWITCH))
  46                 return false;
  47
  48         if (!MLX5_ESWITCH_MANAGER(dev))
  49                 return false;
  50
  51         if (!is_mdev_switchdev_mode(dev))
  52                 return false;
  53
  54         return true;
  55 }
  56
  57 bool mlx5_eth_supported(struct mlx5_core_dev *dev)
  58 {
  59         if (!IS_ENABLED(CONFIG_MLX5_CORE_EN))
  60                 return false;
  61
  62         if (MLX5_CAP_GEN(dev, port_type) != MLX5_CAP_PORT_TYPE_ETH)
  63                 return false;
  64
  65         if (!MLX5_CAP_GEN(dev, eth_net_offloads)) {
  66                 mlx5_core_warn(dev, "Missing eth_net_offloads capability\n");
  67                 return false;
  68         }
  69
  70         if (!MLX5_CAP_GEN(dev, nic_flow_table)) {
  71                 mlx5_core_warn(dev, "Missing nic_flow_table capability\n");
  72                 return false;
  73         }
  74
  75         if (!MLX5_CAP_ETH(dev, csum_cap)) {
  76                 mlx5_core_warn(dev, "Missing csum_cap capability\n");
  77                 return false;
  78         }
  79
  80         if (!MLX5_CAP_ETH(dev, max_lso_cap)) {
  81                 mlx5_core_warn(dev, "Missing max_lso_cap capability\n");
  82                 return false;
  83         }
  84
  85         if (!MLX5_CAP_ETH(dev, vlan_cap)) {
  86                 mlx5_core_warn(dev, "Missing vlan_cap capability\n");
  87                 return false;
  88         }
  89
  90         if (!MLX5_CAP_ETH(dev, rss_ind_tbl_cap)) {
  91                 mlx5_core_warn(dev, "Missing rss_ind_tbl_cap capability\n");
  92                 return false;
  93         }
  94
  95         if (MLX5_CAP_FLOWTABLE(dev,
  96                                flow_table_properties_nic_receive.max_ft_level) < 3) {
  97                 mlx5_core_warn(dev, "max_ft_level < 3\n");
  98                 return false;
  99         }
 100
 101         if (!MLX5_CAP_ETH(dev, self_lb_en_modifiable))
 102                 mlx5_core_warn(dev, "Self loop back prevention is not supported\n");
 103         if (!MLX5_CAP_GEN(dev, cq_moderation))
 104                 mlx5_core_warn(dev, "CQ moderation is not supported\n");
 105
 106         return true;
 107 }
 108
 109 bool mlx5_vnet_supported(struct mlx5_core_dev *dev)
 110 {
 111         if (!IS_ENABLED(CONFIG_MLX5_VDPA_NET))
 112                 return false;
 113
 114         if (mlx5_core_is_pf(dev))
 115                 return false;
 116
 117         if (!(MLX5_CAP_GEN_64(dev, general_obj_types) &
 118               MLX5_GENERAL_OBJ_TYPES_CAP_VIRTIO_NET_Q))
 119                 return false;
 120
 121         if (!(MLX5_CAP_DEV_VDPA_EMULATION(dev, event_mode) &
 122               MLX5_VIRTIO_Q_EVENT_MODE_QP_MODE))
 123                 return false;
 124
 125         if (!MLX5_CAP_DEV_VDPA_EMULATION(dev, eth_frame_offload_type))
 126                 return false;
 127
 128         return true;
 129 }
 130
 131 static bool is_vnet_enabled(struct mlx5_core_dev *dev)
 132 {
 133         union devlink_param_value val;
 134         int err;
 135
 136         err = devl_param_driverinit_value_get(priv_to_devlink(dev),
 137                                               DEVLINK_PARAM_GENERIC_ID_ENABLE_VNET,
 138                                               &val);
 139         return err ? false : val.vbool;
 140 }
 141
 142 static bool is_ib_rep_supported(struct mlx5_core_dev *dev)
 143 {
 144         if (!IS_ENABLED(CONFIG_MLX5_INFINIBAND))
 145                 return false;
 146
 147         if (dev->priv.flags & MLX5_PRIV_FLAGS_DISABLE_IB_ADEV)
 148                 return false;
 149
 150         if (!is_eth_rep_supported(dev))
 151                 return false;
 152
 153         if (mlx5_core_mp_enabled(dev))
 154                 return false;
 155
 156         return true;
 157 }
 158
 159 static bool is_mp_supported(struct mlx5_core_dev *dev)
 160 {
 161         if (!IS_ENABLED(CONFIG_MLX5_INFINIBAND))
 162                 return false;
 163
 164         if (dev->priv.flags & MLX5_PRIV_FLAGS_DISABLE_IB_ADEV)
 165                 return false;
 166
 167         if (is_ib_rep_supported(dev))
 168                 return false;
 169
 170         if (MLX5_CAP_GEN(dev, port_type) != MLX5_CAP_PORT_TYPE_ETH)
 171                 return false;
 172
 173         if (!mlx5_core_is_mp_slave(dev))
 174                 return false;
 175
 176         return true;
 177 }
 178
 179 bool mlx5_rdma_supported(struct mlx5_core_dev *dev)
 180 {
 181         if (!IS_ENABLED(CONFIG_MLX5_INFINIBAND))
 182                 return false;
 183
 184         if (dev->priv.flags & MLX5_PRIV_FLAGS_DISABLE_IB_ADEV)
 185                 return false;
 186
 187         if (is_ib_rep_supported(dev))
 188                 return false;
 189
 190         if (is_mp_supported(dev))
 191                 return false;
 192
 193         return true;
 194 }
 195
 196 static bool is_ib_enabled(struct mlx5_core_dev *dev)
 197 {
 198         union devlink_param_value val;
 199         int err;
 200
 201         err = devl_param_driverinit_value_get(priv_to_devlink(dev),
 202                                               DEVLINK_PARAM_GENERIC_ID_ENABLE_RDMA,
 203                                               &val);
 204         return err ? false : val.vbool;
 205 }
 206
 207 static bool is_dpll_supported(struct mlx5_core_dev *dev)
 208 {
 209         if (!IS_ENABLED(CONFIG_MLX5_DPLL))
 210                 return false;
 211
 212         if (!MLX5_CAP_MCAM_REG2(dev, synce_registers)) {
 213                 mlx5_core_dbg(dev, "Missing SyncE capability\n");
 214                 return false;
 215         }
 216
 217         return true;
 218 }
 219
 220 enum {
 221         MLX5_INTERFACE_PROTOCOL_ETH,
 222         MLX5_INTERFACE_PROTOCOL_ETH_REP,
 223
 224         MLX5_INTERFACE_PROTOCOL_IB,
 225         MLX5_INTERFACE_PROTOCOL_IB_REP,
 226         MLX5_INTERFACE_PROTOCOL_MPIB,
 227
 228         MLX5_INTERFACE_PROTOCOL_VNET,
 229
 230         MLX5_INTERFACE_PROTOCOL_DPLL,
 231 };
 232
 233 static const struct mlx5_adev_device {
 234         const char *suffix;
 235         bool (*is_supported)(struct mlx5_core_dev *dev);
 236         bool (*is_enabled)(struct mlx5_core_dev *dev);
 237 } mlx5_adev_devices[] = {
 238         [MLX5_INTERFACE_PROTOCOL_VNET] = { .suffix = "vnet",
 239                                            .is_supported = &mlx5_vnet_supported,
 240                                            .is_enabled = &is_vnet_enabled },
 241         [MLX5_INTERFACE_PROTOCOL_IB] = { .suffix = "rdma",
 242                                          .is_supported = &mlx5_rdma_supported,
 243                                          .is_enabled = &is_ib_enabled },
 244         [MLX5_INTERFACE_PROTOCOL_ETH] = { .suffix = "eth",
 245                                           .is_supported = &mlx5_eth_supported,
 246                                           .is_enabled = &mlx5_core_is_eth_enabled },
 247         [MLX5_INTERFACE_PROTOCOL_ETH_REP] = { .suffix = "eth-rep",
 248                                            .is_supported = &is_eth_rep_supported },
 249         [MLX5_INTERFACE_PROTOCOL_IB_REP] = { .suffix = "rdma-rep",
 250                                            .is_supported = &is_ib_rep_supported },
 251         [MLX5_INTERFACE_PROTOCOL_MPIB] = { .suffix = "multiport",
 252                                            .is_supported = &is_mp_supported },
 253         [MLX5_INTERFACE_PROTOCOL_DPLL] = { .suffix = "dpll",
 254                                            .is_supported = &is_dpll_supported },
 255 };
 256
 257 int mlx5_adev_idx_alloc(void)
 258 {
 259         return ida_alloc(&mlx5_adev_ida, GFP_KERNEL);
 260 }
 261
 262 void mlx5_adev_idx_free(int idx)
 263 {
 264         ida_free(&mlx5_adev_ida, idx);
 265 }
 266
 267 int mlx5_adev_init(struct mlx5_core_dev *dev)
 268 {
 269         struct mlx5_priv *priv = &dev->priv;
 270
 271         priv->adev = kcalloc(ARRAY_SIZE(mlx5_adev_devices),
 272                              sizeof(struct mlx5_adev *), GFP_KERNEL);
 273         if (!priv->adev)
 274                 return -ENOMEM;
 275
 276         return 0;
 277 }
 278
 279 void mlx5_adev_cleanup(struct mlx5_core_dev *dev)
 280 {
 281         struct mlx5_priv *priv = &dev->priv;
 282
 283         kfree(priv->adev);
 284 }
 285
 286 static void adev_release(struct device *dev)
 287 {
 288         struct mlx5_adev *mlx5_adev =
 289                 container_of(dev, struct mlx5_adev, adev.dev);
 290         struct mlx5_priv *priv = &mlx5_adev->mdev->priv;
 291         int idx = mlx5_adev->idx;
 292
 293         kfree(mlx5_adev);
 294         priv->adev[idx] = NULL;
 295 }
 296
 297 static struct mlx5_adev *add_adev(struct mlx5_core_dev *dev, int idx)
 298 {
 299         const char *suffix = mlx5_adev_devices[idx].suffix;
 300         struct auxiliary_device *adev;
 301         struct mlx5_adev *madev;
 302         int ret;
 303
 304         madev = kzalloc(sizeof(*madev), GFP_KERNEL);
 305         if (!madev)
 306                 return ERR_PTR(-ENOMEM);
 307
 308         adev = &madev->adev;
 309         adev->id = dev->priv.adev_idx;
 310         adev->name = suffix;
 311         adev->dev.parent = dev->device;
 312         adev->dev.release = adev_release;
 313         madev->mdev = dev;
 314         madev->idx = idx;
 315
 316         ret = auxiliary_device_init(adev);
 317         if (ret) {
 318                 kfree(madev);
 319                 return ERR_PTR(ret);
 320         }
 321
 322         ret = auxiliary_device_add(adev);
 323         if (ret) {
 324                 auxiliary_device_uninit(adev);
 325                 return ERR_PTR(ret);
 326         }
 327         return madev;
 328 }
 329
 330 static void del_adev(struct auxiliary_device *adev)
 331 {
 332         auxiliary_device_delete(adev);
 333         auxiliary_device_uninit(adev);
 334 }
 335
 336 void mlx5_dev_set_lightweight(struct mlx5_core_dev *dev)
 337 {
 338         mlx5_devcom_comp_lock(dev->priv.hca_devcom_comp);
 339         dev->priv.flags |= MLX5_PRIV_FLAGS_DISABLE_ALL_ADEV;
 340         mlx5_devcom_comp_unlock(dev->priv.hca_devcom_comp);
 341 }
 342
 343 bool mlx5_dev_is_lightweight(struct mlx5_core_dev *dev)
 344 {
 345         return dev->priv.flags & MLX5_PRIV_FLAGS_DISABLE_ALL_ADEV;
 346 }
 347
 348 int mlx5_attach_device(struct mlx5_core_dev *dev)
 349 {
 350         struct mlx5_priv *priv = &dev->priv;
 351         struct auxiliary_device *adev;
 352         const struct auxiliary_driver *adrv;
 353         int ret = 0, i;
 354
 355         devl_assert_locked(priv_to_devlink(dev));
 356         mlx5_devcom_comp_lock(dev->priv.hca_devcom_comp);
 357         priv->flags &= ~MLX5_PRIV_FLAGS_DETACH;
 358         for (i = 0; i < ARRAY_SIZE(mlx5_adev_devices); i++) {
 359                 if (!priv->adev[i]) {
 360                         bool is_supported = false;
 361
 362                         if (mlx5_adev_devices[i].is_enabled) {
 363                                 bool enabled;
 364
 365                                 enabled = mlx5_adev_devices[i].is_enabled(dev);
 366                                 if (!enabled)
 367                                         continue;
 368                         }
 369
 370                         if (mlx5_adev_devices[i].is_supported)
 371                                 is_supported = mlx5_adev_devices[i].is_supported(dev);
 372
 373                         if (!is_supported)
 374                                 continue;
 375
 376                         priv->adev[i] = add_adev(dev, i);
 377                         if (IS_ERR(priv->adev[i])) {
 378                                 ret = PTR_ERR(priv->adev[i]);
 379                                 priv->adev[i] = NULL;
 380                         }
 381                 } else {
 382                         adev = &priv->adev[i]->adev;
 383
 384                         /* Pay attention that this is not PCI driver that
 385                          * mlx5_core_dev is connected, but auxiliary driver.
 386                          */
 387                         if (!adev->dev.driver)
 388                                 continue;
 389                         adrv = to_auxiliary_drv(adev->dev.driver);
 390
 391                         if (adrv->resume)
 392                                 ret = adrv->resume(adev);
 393                 }
 394                 if (ret) {
 395                         mlx5_core_warn(dev, "Device[%d] (%s) failed to load\n",
 396                                        i, mlx5_adev_devices[i].suffix);
 397
 398                         break;
 399                 }
 400         }
 401         mlx5_devcom_comp_unlock(dev->priv.hca_devcom_comp);
 402         return ret;
 403 }
 404
 405 void mlx5_detach_device(struct mlx5_core_dev *dev, bool suspend)
 406 {
 407         struct mlx5_priv *priv = &dev->priv;
 408         struct auxiliary_device *adev;
 409         const struct auxiliary_driver *adrv;
 410         pm_message_t pm = {};
 411         int i;
 412
 413         devl_assert_locked(priv_to_devlink(dev));
 414         mlx5_devcom_comp_lock(dev->priv.hca_devcom_comp);
 415         for (i = ARRAY_SIZE(mlx5_adev_devices) - 1; i >= 0; i--) {
 416                 if (!priv->adev[i])
 417                         continue;
 418
 419                 if (mlx5_adev_devices[i].is_enabled) {
 420                         bool enabled;
 421
 422                         enabled = mlx5_adev_devices[i].is_enabled(dev);
 423                         if (!enabled)
 424                                 goto skip_suspend;
 425                 }
 426
 427                 adev = &priv->adev[i]->adev;
 428                 /* Auxiliary driver was unbind manually through sysfs */
 429                 if (!adev->dev.driver)
 430                         goto skip_suspend;
 431
 432                 adrv = to_auxiliary_drv(adev->dev.driver);
 433
 434                 if (adrv->suspend && suspend) {
 435                         adrv->suspend(adev, pm);
 436                         continue;
 437                 }
 438
 439 skip_suspend:
 440                 del_adev(&priv->adev[i]->adev);
 441                 priv->adev[i] = NULL;
 442         }
 443         priv->flags |= MLX5_PRIV_FLAGS_DETACH;
 444         mlx5_devcom_comp_unlock(dev->priv.hca_devcom_comp);
 445 }
 446
 447 int mlx5_register_device(struct mlx5_core_dev *dev)
 448 {
 449         int ret;
 450
 451         devl_assert_locked(priv_to_devlink(dev));
 452         mlx5_devcom_comp_lock(dev->priv.hca_devcom_comp);
 453         dev->priv.flags &= ~MLX5_PRIV_FLAGS_DISABLE_ALL_ADEV;
 454         ret = mlx5_rescan_drivers_locked(dev);
 455         mlx5_devcom_comp_unlock(dev->priv.hca_devcom_comp);
 456         if (ret)
 457                 mlx5_unregister_device(dev);
 458
 459         return ret;
 460 }
 461
 462 void mlx5_unregister_device(struct mlx5_core_dev *dev)
 463 {
 464         devl_assert_locked(priv_to_devlink(dev));
 465         mlx5_devcom_comp_lock(dev->priv.hca_devcom_comp);
 466         dev->priv.flags = MLX5_PRIV_FLAGS_DISABLE_ALL_ADEV;
 467         mlx5_rescan_drivers_locked(dev);
 468         mlx5_devcom_comp_unlock(dev->priv.hca_devcom_comp);
 469 }
 470
 471 static int add_drivers(struct mlx5_core_dev *dev)
 472 {
 473         struct mlx5_priv *priv = &dev->priv;
 474         int i, ret = 0;
 475
 476         for (i = 0; i < ARRAY_SIZE(mlx5_adev_devices); i++) {
 477                 bool is_supported = false;
 478
 479                 if (priv->adev[i])
 480                         continue;
 481
 482                 if (mlx5_adev_devices[i].is_enabled &&
 483                     !(mlx5_adev_devices[i].is_enabled(dev)))
 484                         continue;
 485
 486                 if (mlx5_adev_devices[i].is_supported)
 487                         is_supported = mlx5_adev_devices[i].is_supported(dev);
 488
 489                 if (!is_supported)
 490                         continue;
 491
 492                 priv->adev[i] = add_adev(dev, i);
 493                 if (IS_ERR(priv->adev[i])) {
 494                         mlx5_core_warn(dev, "Device[%d] (%s) failed to load\n",
 495                                        i, mlx5_adev_devices[i].suffix);
 496                         /* We continue to rescan drivers and leave to the caller
 497                          * to make decision if to release everything or continue.
 498                          */
 499                         ret = PTR_ERR(priv->adev[i]);
 500                         priv->adev[i] = NULL;
 501                 }
 502         }
 503         return ret;
 504 }
 505
 506 static void delete_drivers(struct mlx5_core_dev *dev)
 507 {
 508         struct mlx5_priv *priv = &dev->priv;
 509         bool delete_all;
 510         int i;
 511
 512         delete_all = priv->flags & MLX5_PRIV_FLAGS_DISABLE_ALL_ADEV;
 513
 514         for (i = ARRAY_SIZE(mlx5_adev_devices) - 1; i >= 0; i--) {
 515                 bool is_supported = false;
 516
 517                 if (!priv->adev[i])
 518                         continue;
 519
 520                 if (mlx5_adev_devices[i].is_enabled) {
 521                         bool enabled;
 522
 523                         enabled = mlx5_adev_devices[i].is_enabled(dev);
 524                         if (!enabled)
 525                                 goto del_adev;
 526                 }
 527
 528                 if (mlx5_adev_devices[i].is_supported && !delete_all)
 529                         is_supported = mlx5_adev_devices[i].is_supported(dev);
 530
 531                 if (is_supported)
 532                         continue;
 533
 534 del_adev:
 535                 del_adev(&priv->adev[i]->adev);
 536                 priv->adev[i] = NULL;
 537         }
 538 }
 539
 540 /* This function is used after mlx5_core_dev is reconfigured.
 541  */
 542 int mlx5_rescan_drivers_locked(struct mlx5_core_dev *dev)
 543 {
 544         struct mlx5_priv *priv = &dev->priv;
 545
 546         if (priv->flags & MLX5_PRIV_FLAGS_DETACH)
 547                 return 0;
 548
 549         delete_drivers(dev);
 550         if (priv->flags & MLX5_PRIV_FLAGS_DISABLE_ALL_ADEV)
 551                 return 0;
 552
 553         return add_drivers(dev);
 554 }
 555
 556 bool mlx5_same_hw_devs(struct mlx5_core_dev *dev, struct mlx5_core_dev *peer_dev)
 557 {
 558         u64 fsystem_guid, psystem_guid;
 559
 560         fsystem_guid = mlx5_query_nic_system_image_guid(dev);
 561         psystem_guid = mlx5_query_nic_system_image_guid(peer_dev);
 562
 563         return (fsystem_guid && psystem_guid && fsystem_guid == psystem_guid);
 564 }