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 39 /* intf dev list mutex */ 40 static DEFINE_MUTEX(mlx5_intf_mutex); 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 static bool is_eth_enabled(struct mlx5_core_dev *dev) 110 { 111 union devlink_param_value val; 112 int err; 113 114 err = devlink_param_driverinit_value_get(priv_to_devlink(dev), 115 DEVLINK_PARAM_GENERIC_ID_ENABLE_ETH, 116 &val); 117 return err ? false : val.vbool; 118 } 119 120 bool mlx5_vnet_supported(struct mlx5_core_dev *dev) 121 { 122 if (!IS_ENABLED(CONFIG_MLX5_VDPA_NET)) 123 return false; 124 125 if (mlx5_core_is_pf(dev)) 126 return false; 127 128 if (!(MLX5_CAP_GEN_64(dev, general_obj_types) & 129 MLX5_GENERAL_OBJ_TYPES_CAP_VIRTIO_NET_Q)) 130 return false; 131 132 if (!(MLX5_CAP_DEV_VDPA_EMULATION(dev, event_mode) & 133 MLX5_VIRTIO_Q_EVENT_MODE_QP_MODE)) 134 return false; 135 136 if (!MLX5_CAP_DEV_VDPA_EMULATION(dev, eth_frame_offload_type)) 137 return false; 138 139 return true; 140 } 141 142 static bool is_vnet_enabled(struct mlx5_core_dev *dev) 143 { 144 union devlink_param_value val; 145 int err; 146 147 err = devlink_param_driverinit_value_get(priv_to_devlink(dev), 148 DEVLINK_PARAM_GENERIC_ID_ENABLE_VNET, 149 &val); 150 return err ? false : val.vbool; 151 } 152 153 static bool is_ib_rep_supported(struct mlx5_core_dev *dev) 154 { 155 if (!IS_ENABLED(CONFIG_MLX5_INFINIBAND)) 156 return false; 157 158 if (dev->priv.flags & MLX5_PRIV_FLAGS_DISABLE_IB_ADEV) 159 return false; 160 161 if (!is_eth_rep_supported(dev)) 162 return false; 163 164 if (!MLX5_ESWITCH_MANAGER(dev)) 165 return false; 166 167 if (!is_mdev_switchdev_mode(dev)) 168 return false; 169 170 if (mlx5_core_mp_enabled(dev)) 171 return false; 172 173 return true; 174 } 175 176 static bool is_mp_supported(struct mlx5_core_dev *dev) 177 { 178 if (!IS_ENABLED(CONFIG_MLX5_INFINIBAND)) 179 return false; 180 181 if (dev->priv.flags & MLX5_PRIV_FLAGS_DISABLE_IB_ADEV) 182 return false; 183 184 if (is_ib_rep_supported(dev)) 185 return false; 186 187 if (MLX5_CAP_GEN(dev, port_type) != MLX5_CAP_PORT_TYPE_ETH) 188 return false; 189 190 if (!mlx5_core_is_mp_slave(dev)) 191 return false; 192 193 return true; 194 } 195 196 bool mlx5_rdma_supported(struct mlx5_core_dev *dev) 197 { 198 if (!IS_ENABLED(CONFIG_MLX5_INFINIBAND)) 199 return false; 200 201 if (dev->priv.flags & MLX5_PRIV_FLAGS_DISABLE_IB_ADEV) 202 return false; 203 204 if (is_ib_rep_supported(dev)) 205 return false; 206 207 if (is_mp_supported(dev)) 208 return false; 209 210 return true; 211 } 212 213 static bool is_ib_enabled(struct mlx5_core_dev *dev) 214 { 215 union devlink_param_value val; 216 int err; 217 218 err = devlink_param_driverinit_value_get(priv_to_devlink(dev), 219 DEVLINK_PARAM_GENERIC_ID_ENABLE_RDMA, 220 &val); 221 return err ? false : val.vbool; 222 } 223 224 enum { 225 MLX5_INTERFACE_PROTOCOL_ETH, 226 MLX5_INTERFACE_PROTOCOL_ETH_REP, 227 228 MLX5_INTERFACE_PROTOCOL_IB, 229 MLX5_INTERFACE_PROTOCOL_IB_REP, 230 MLX5_INTERFACE_PROTOCOL_MPIB, 231 232 MLX5_INTERFACE_PROTOCOL_VNET, 233 }; 234 235 static const struct mlx5_adev_device { 236 const char *suffix; 237 bool (*is_supported)(struct mlx5_core_dev *dev); 238 bool (*is_enabled)(struct mlx5_core_dev *dev); 239 } mlx5_adev_devices[] = { 240 [MLX5_INTERFACE_PROTOCOL_VNET] = { .suffix = "vnet", 241 .is_supported = &mlx5_vnet_supported, 242 .is_enabled = &is_vnet_enabled }, 243 [MLX5_INTERFACE_PROTOCOL_IB] = { .suffix = "rdma", 244 .is_supported = &mlx5_rdma_supported, 245 .is_enabled = &is_ib_enabled }, 246 [MLX5_INTERFACE_PROTOCOL_ETH] = { .suffix = "eth", 247 .is_supported = &mlx5_eth_supported, 248 .is_enabled = &is_eth_enabled }, 249 [MLX5_INTERFACE_PROTOCOL_ETH_REP] = { .suffix = "eth-rep", 250 .is_supported = &is_eth_rep_supported }, 251 [MLX5_INTERFACE_PROTOCOL_IB_REP] = { .suffix = "rdma-rep", 252 .is_supported = &is_ib_rep_supported }, 253 [MLX5_INTERFACE_PROTOCOL_MPIB] = { .suffix = "multiport", 254 .is_supported = &is_mp_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 int mlx5_attach_device(struct mlx5_core_dev *dev) 337 { 338 struct mlx5_priv *priv = &dev->priv; 339 struct auxiliary_device *adev; 340 struct auxiliary_driver *adrv; 341 int ret = 0, i; 342 343 mutex_lock(&mlx5_intf_mutex); 344 priv->flags &= ~MLX5_PRIV_FLAGS_DETACH; 345 for (i = 0; i < ARRAY_SIZE(mlx5_adev_devices); i++) { 346 if (!priv->adev[i]) { 347 bool is_supported = false; 348 349 if (mlx5_adev_devices[i].is_enabled) { 350 bool enabled; 351 352 enabled = mlx5_adev_devices[i].is_enabled(dev); 353 if (!enabled) 354 continue; 355 } 356 357 if (mlx5_adev_devices[i].is_supported) 358 is_supported = mlx5_adev_devices[i].is_supported(dev); 359 360 if (!is_supported) 361 continue; 362 363 priv->adev[i] = add_adev(dev, i); 364 if (IS_ERR(priv->adev[i])) { 365 ret = PTR_ERR(priv->adev[i]); 366 priv->adev[i] = NULL; 367 } 368 } else { 369 adev = &priv->adev[i]->adev; 370 371 /* Pay attention that this is not PCI driver that 372 * mlx5_core_dev is connected, but auxiliary driver. 373 * 374 * Here we can race of module unload with devlink 375 * reload, but we don't need to take extra lock because 376 * we are holding global mlx5_intf_mutex. 377 */ 378 if (!adev->dev.driver) 379 continue; 380 adrv = to_auxiliary_drv(adev->dev.driver); 381 382 if (adrv->resume) 383 ret = adrv->resume(adev); 384 } 385 if (ret) { 386 mlx5_core_warn(dev, "Device[%d] (%s) failed to load\n", 387 i, mlx5_adev_devices[i].suffix); 388 389 break; 390 } 391 } 392 mutex_unlock(&mlx5_intf_mutex); 393 return ret; 394 } 395 396 void mlx5_detach_device(struct mlx5_core_dev *dev) 397 { 398 struct mlx5_priv *priv = &dev->priv; 399 struct auxiliary_device *adev; 400 struct auxiliary_driver *adrv; 401 pm_message_t pm = {}; 402 int i; 403 404 mutex_lock(&mlx5_intf_mutex); 405 for (i = ARRAY_SIZE(mlx5_adev_devices) - 1; i >= 0; i--) { 406 if (!priv->adev[i]) 407 continue; 408 409 if (mlx5_adev_devices[i].is_enabled) { 410 bool enabled; 411 412 enabled = mlx5_adev_devices[i].is_enabled(dev); 413 if (!enabled) 414 goto skip_suspend; 415 } 416 417 adev = &priv->adev[i]->adev; 418 /* Auxiliary driver was unbind manually through sysfs */ 419 if (!adev->dev.driver) 420 goto skip_suspend; 421 422 adrv = to_auxiliary_drv(adev->dev.driver); 423 424 if (adrv->suspend) { 425 adrv->suspend(adev, pm); 426 continue; 427 } 428 429 skip_suspend: 430 del_adev(&priv->adev[i]->adev); 431 priv->adev[i] = NULL; 432 } 433 priv->flags |= MLX5_PRIV_FLAGS_DETACH; 434 mutex_unlock(&mlx5_intf_mutex); 435 } 436 437 int mlx5_register_device(struct mlx5_core_dev *dev) 438 { 439 int ret; 440 441 mutex_lock(&mlx5_intf_mutex); 442 dev->priv.flags &= ~MLX5_PRIV_FLAGS_DISABLE_ALL_ADEV; 443 ret = mlx5_rescan_drivers_locked(dev); 444 mutex_unlock(&mlx5_intf_mutex); 445 if (ret) 446 mlx5_unregister_device(dev); 447 448 return ret; 449 } 450 451 void mlx5_unregister_device(struct mlx5_core_dev *dev) 452 { 453 mutex_lock(&mlx5_intf_mutex); 454 dev->priv.flags = MLX5_PRIV_FLAGS_DISABLE_ALL_ADEV; 455 mlx5_rescan_drivers_locked(dev); 456 mutex_unlock(&mlx5_intf_mutex); 457 } 458 459 static int add_drivers(struct mlx5_core_dev *dev) 460 { 461 struct mlx5_priv *priv = &dev->priv; 462 int i, ret = 0; 463 464 for (i = 0; i < ARRAY_SIZE(mlx5_adev_devices); i++) { 465 bool is_supported = false; 466 467 if (priv->adev[i]) 468 continue; 469 470 if (mlx5_adev_devices[i].is_supported) 471 is_supported = mlx5_adev_devices[i].is_supported(dev); 472 473 if (!is_supported) 474 continue; 475 476 priv->adev[i] = add_adev(dev, i); 477 if (IS_ERR(priv->adev[i])) { 478 mlx5_core_warn(dev, "Device[%d] (%s) failed to load\n", 479 i, mlx5_adev_devices[i].suffix); 480 /* We continue to rescan drivers and leave to the caller 481 * to make decision if to release everything or continue. 482 */ 483 ret = PTR_ERR(priv->adev[i]); 484 priv->adev[i] = NULL; 485 } 486 } 487 return ret; 488 } 489 490 static void delete_drivers(struct mlx5_core_dev *dev) 491 { 492 struct mlx5_priv *priv = &dev->priv; 493 bool delete_all; 494 int i; 495 496 delete_all = priv->flags & MLX5_PRIV_FLAGS_DISABLE_ALL_ADEV; 497 498 for (i = ARRAY_SIZE(mlx5_adev_devices) - 1; i >= 0; i--) { 499 bool is_supported = false; 500 501 if (!priv->adev[i]) 502 continue; 503 504 if (mlx5_adev_devices[i].is_enabled) { 505 bool enabled; 506 507 enabled = mlx5_adev_devices[i].is_enabled(dev); 508 if (!enabled) 509 goto del_adev; 510 } 511 512 if (mlx5_adev_devices[i].is_supported && !delete_all) 513 is_supported = mlx5_adev_devices[i].is_supported(dev); 514 515 if (is_supported) 516 continue; 517 518 del_adev: 519 del_adev(&priv->adev[i]->adev); 520 priv->adev[i] = NULL; 521 } 522 } 523 524 /* This function is used after mlx5_core_dev is reconfigured. 525 */ 526 int mlx5_rescan_drivers_locked(struct mlx5_core_dev *dev) 527 { 528 struct mlx5_priv *priv = &dev->priv; 529 530 lockdep_assert_held(&mlx5_intf_mutex); 531 if (priv->flags & MLX5_PRIV_FLAGS_DETACH) 532 return 0; 533 534 delete_drivers(dev); 535 if (priv->flags & MLX5_PRIV_FLAGS_DISABLE_ALL_ADEV) 536 return 0; 537 538 return add_drivers(dev); 539 } 540 541 bool mlx5_same_hw_devs(struct mlx5_core_dev *dev, struct mlx5_core_dev *peer_dev) 542 { 543 u64 fsystem_guid, psystem_guid; 544 545 fsystem_guid = mlx5_query_nic_system_image_guid(dev); 546 psystem_guid = mlx5_query_nic_system_image_guid(peer_dev); 547 548 return (fsystem_guid && psystem_guid && fsystem_guid == psystem_guid); 549 } 550 551 static u32 mlx5_gen_pci_id(const struct mlx5_core_dev *dev) 552 { 553 return (u32)((pci_domain_nr(dev->pdev->bus) << 16) | 554 (dev->pdev->bus->number << 8) | 555 PCI_SLOT(dev->pdev->devfn)); 556 } 557 558 static int _next_phys_dev(struct mlx5_core_dev *mdev, 559 const struct mlx5_core_dev *curr) 560 { 561 if (!mlx5_core_is_pf(mdev)) 562 return 0; 563 564 if (mdev == curr) 565 return 0; 566 567 if (!mlx5_same_hw_devs(mdev, (struct mlx5_core_dev *)curr) && 568 mlx5_gen_pci_id(mdev) != mlx5_gen_pci_id(curr)) 569 return 0; 570 571 return 1; 572 } 573 574 static int next_phys_dev(struct device *dev, const void *data) 575 { 576 struct mlx5_adev *madev = container_of(dev, struct mlx5_adev, adev.dev); 577 struct mlx5_core_dev *mdev = madev->mdev; 578 579 return _next_phys_dev(mdev, data); 580 } 581 582 static int next_phys_dev_lag(struct device *dev, const void *data) 583 { 584 struct mlx5_adev *madev = container_of(dev, struct mlx5_adev, adev.dev); 585 struct mlx5_core_dev *mdev = madev->mdev; 586 587 if (!MLX5_CAP_GEN(mdev, vport_group_manager) || 588 !MLX5_CAP_GEN(mdev, lag_master) || 589 MLX5_CAP_GEN(mdev, num_lag_ports) != MLX5_MAX_PORTS) 590 return 0; 591 592 return _next_phys_dev(mdev, data); 593 } 594 595 static struct mlx5_core_dev *mlx5_get_next_dev(struct mlx5_core_dev *dev, 596 int (*match)(struct device *dev, const void *data)) 597 { 598 struct auxiliary_device *adev; 599 struct mlx5_adev *madev; 600 601 if (!mlx5_core_is_pf(dev)) 602 return NULL; 603 604 adev = auxiliary_find_device(NULL, dev, match); 605 if (!adev) 606 return NULL; 607 608 madev = container_of(adev, struct mlx5_adev, adev); 609 put_device(&adev->dev); 610 return madev->mdev; 611 } 612 613 /* Must be called with intf_mutex held */ 614 struct mlx5_core_dev *mlx5_get_next_phys_dev(struct mlx5_core_dev *dev) 615 { 616 lockdep_assert_held(&mlx5_intf_mutex); 617 return mlx5_get_next_dev(dev, &next_phys_dev); 618 } 619 620 /* Must be called with intf_mutex held */ 621 struct mlx5_core_dev *mlx5_get_next_phys_dev_lag(struct mlx5_core_dev *dev) 622 { 623 lockdep_assert_held(&mlx5_intf_mutex); 624 return mlx5_get_next_dev(dev, &next_phys_dev_lag); 625 } 626 627 void mlx5_dev_list_lock(void) 628 { 629 mutex_lock(&mlx5_intf_mutex); 630 } 631 void mlx5_dev_list_unlock(void) 632 { 633 mutex_unlock(&mlx5_intf_mutex); 634 } 635 636 int mlx5_dev_list_trylock(void) 637 { 638 return mutex_trylock(&mlx5_intf_mutex); 639 } 640