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 devl_assert_locked(priv_to_devlink(dev)); 344 mutex_lock(&mlx5_intf_mutex); 345 priv->flags &= ~MLX5_PRIV_FLAGS_DETACH; 346 priv->flags |= MLX5_PRIV_FLAGS_MLX5E_LOCKED_FLOW; 347 for (i = 0; i < ARRAY_SIZE(mlx5_adev_devices); i++) { 348 if (!priv->adev[i]) { 349 bool is_supported = false; 350 351 if (mlx5_adev_devices[i].is_enabled) { 352 bool enabled; 353 354 enabled = mlx5_adev_devices[i].is_enabled(dev); 355 if (!enabled) 356 continue; 357 } 358 359 if (mlx5_adev_devices[i].is_supported) 360 is_supported = mlx5_adev_devices[i].is_supported(dev); 361 362 if (!is_supported) 363 continue; 364 365 priv->adev[i] = add_adev(dev, i); 366 if (IS_ERR(priv->adev[i])) { 367 ret = PTR_ERR(priv->adev[i]); 368 priv->adev[i] = NULL; 369 } 370 } else { 371 adev = &priv->adev[i]->adev; 372 373 /* Pay attention that this is not PCI driver that 374 * mlx5_core_dev is connected, but auxiliary driver. 375 * 376 * Here we can race of module unload with devlink 377 * reload, but we don't need to take extra lock because 378 * we are holding global mlx5_intf_mutex. 379 */ 380 if (!adev->dev.driver) 381 continue; 382 adrv = to_auxiliary_drv(adev->dev.driver); 383 384 if (adrv->resume) 385 ret = adrv->resume(adev); 386 } 387 if (ret) { 388 mlx5_core_warn(dev, "Device[%d] (%s) failed to load\n", 389 i, mlx5_adev_devices[i].suffix); 390 391 break; 392 } 393 } 394 priv->flags &= ~MLX5_PRIV_FLAGS_MLX5E_LOCKED_FLOW; 395 mutex_unlock(&mlx5_intf_mutex); 396 return ret; 397 } 398 399 void mlx5_detach_device(struct mlx5_core_dev *dev) 400 { 401 struct mlx5_priv *priv = &dev->priv; 402 struct auxiliary_device *adev; 403 struct auxiliary_driver *adrv; 404 pm_message_t pm = {}; 405 int i; 406 407 devl_assert_locked(priv_to_devlink(dev)); 408 mutex_lock(&mlx5_intf_mutex); 409 priv->flags |= MLX5_PRIV_FLAGS_MLX5E_LOCKED_FLOW; 410 for (i = ARRAY_SIZE(mlx5_adev_devices) - 1; i >= 0; i--) { 411 if (!priv->adev[i]) 412 continue; 413 414 if (mlx5_adev_devices[i].is_enabled) { 415 bool enabled; 416 417 enabled = mlx5_adev_devices[i].is_enabled(dev); 418 if (!enabled) 419 goto skip_suspend; 420 } 421 422 adev = &priv->adev[i]->adev; 423 /* Auxiliary driver was unbind manually through sysfs */ 424 if (!adev->dev.driver) 425 goto skip_suspend; 426 427 adrv = to_auxiliary_drv(adev->dev.driver); 428 429 if (adrv->suspend) { 430 adrv->suspend(adev, pm); 431 continue; 432 } 433 434 skip_suspend: 435 del_adev(&priv->adev[i]->adev); 436 priv->adev[i] = NULL; 437 } 438 priv->flags &= ~MLX5_PRIV_FLAGS_MLX5E_LOCKED_FLOW; 439 priv->flags |= MLX5_PRIV_FLAGS_DETACH; 440 mutex_unlock(&mlx5_intf_mutex); 441 } 442 443 int mlx5_register_device(struct mlx5_core_dev *dev) 444 { 445 int ret; 446 447 devl_assert_locked(priv_to_devlink(dev)); 448 mutex_lock(&mlx5_intf_mutex); 449 dev->priv.flags &= ~MLX5_PRIV_FLAGS_DISABLE_ALL_ADEV; 450 ret = mlx5_rescan_drivers_locked(dev); 451 mutex_unlock(&mlx5_intf_mutex); 452 if (ret) 453 mlx5_unregister_device(dev); 454 455 return ret; 456 } 457 458 void mlx5_unregister_device(struct mlx5_core_dev *dev) 459 { 460 devl_assert_locked(priv_to_devlink(dev)); 461 mutex_lock(&mlx5_intf_mutex); 462 dev->priv.flags = MLX5_PRIV_FLAGS_DISABLE_ALL_ADEV; 463 mlx5_rescan_drivers_locked(dev); 464 mutex_unlock(&mlx5_intf_mutex); 465 } 466 467 static int add_drivers(struct mlx5_core_dev *dev) 468 { 469 struct mlx5_priv *priv = &dev->priv; 470 int i, ret = 0; 471 472 for (i = 0; i < ARRAY_SIZE(mlx5_adev_devices); i++) { 473 bool is_supported = false; 474 475 if (priv->adev[i]) 476 continue; 477 478 if (mlx5_adev_devices[i].is_supported) 479 is_supported = mlx5_adev_devices[i].is_supported(dev); 480 481 if (!is_supported) 482 continue; 483 484 priv->adev[i] = add_adev(dev, i); 485 if (IS_ERR(priv->adev[i])) { 486 mlx5_core_warn(dev, "Device[%d] (%s) failed to load\n", 487 i, mlx5_adev_devices[i].suffix); 488 /* We continue to rescan drivers and leave to the caller 489 * to make decision if to release everything or continue. 490 */ 491 ret = PTR_ERR(priv->adev[i]); 492 priv->adev[i] = NULL; 493 } 494 } 495 return ret; 496 } 497 498 static void delete_drivers(struct mlx5_core_dev *dev) 499 { 500 struct mlx5_priv *priv = &dev->priv; 501 bool delete_all; 502 int i; 503 504 delete_all = priv->flags & MLX5_PRIV_FLAGS_DISABLE_ALL_ADEV; 505 506 for (i = ARRAY_SIZE(mlx5_adev_devices) - 1; i >= 0; i--) { 507 bool is_supported = false; 508 509 if (!priv->adev[i]) 510 continue; 511 512 if (mlx5_adev_devices[i].is_enabled) { 513 bool enabled; 514 515 enabled = mlx5_adev_devices[i].is_enabled(dev); 516 if (!enabled) 517 goto del_adev; 518 } 519 520 if (mlx5_adev_devices[i].is_supported && !delete_all) 521 is_supported = mlx5_adev_devices[i].is_supported(dev); 522 523 if (is_supported) 524 continue; 525 526 del_adev: 527 del_adev(&priv->adev[i]->adev); 528 priv->adev[i] = NULL; 529 } 530 } 531 532 /* This function is used after mlx5_core_dev is reconfigured. 533 */ 534 int mlx5_rescan_drivers_locked(struct mlx5_core_dev *dev) 535 { 536 struct mlx5_priv *priv = &dev->priv; 537 int err = 0; 538 539 lockdep_assert_held(&mlx5_intf_mutex); 540 if (priv->flags & MLX5_PRIV_FLAGS_DETACH) 541 return 0; 542 543 priv->flags |= MLX5_PRIV_FLAGS_MLX5E_LOCKED_FLOW; 544 delete_drivers(dev); 545 if (priv->flags & MLX5_PRIV_FLAGS_DISABLE_ALL_ADEV) 546 goto out; 547 548 err = add_drivers(dev); 549 550 out: 551 priv->flags &= ~MLX5_PRIV_FLAGS_MLX5E_LOCKED_FLOW; 552 return err; 553 } 554 555 bool mlx5_same_hw_devs(struct mlx5_core_dev *dev, struct mlx5_core_dev *peer_dev) 556 { 557 u64 fsystem_guid, psystem_guid; 558 559 fsystem_guid = mlx5_query_nic_system_image_guid(dev); 560 psystem_guid = mlx5_query_nic_system_image_guid(peer_dev); 561 562 return (fsystem_guid && psystem_guid && fsystem_guid == psystem_guid); 563 } 564 565 static u32 mlx5_gen_pci_id(const struct mlx5_core_dev *dev) 566 { 567 return (u32)((pci_domain_nr(dev->pdev->bus) << 16) | 568 (dev->pdev->bus->number << 8) | 569 PCI_SLOT(dev->pdev->devfn)); 570 } 571 572 static int _next_phys_dev(struct mlx5_core_dev *mdev, 573 const struct mlx5_core_dev *curr) 574 { 575 if (!mlx5_core_is_pf(mdev)) 576 return 0; 577 578 if (mdev == curr) 579 return 0; 580 581 if (!mlx5_same_hw_devs(mdev, (struct mlx5_core_dev *)curr) && 582 mlx5_gen_pci_id(mdev) != mlx5_gen_pci_id(curr)) 583 return 0; 584 585 return 1; 586 } 587 588 static void *pci_get_other_drvdata(struct device *this, struct device *other) 589 { 590 if (this->driver != other->driver) 591 return NULL; 592 593 return pci_get_drvdata(to_pci_dev(other)); 594 } 595 596 static int next_phys_dev_lag(struct device *dev, const void *data) 597 { 598 struct mlx5_core_dev *mdev, *this = (struct mlx5_core_dev *)data; 599 600 mdev = pci_get_other_drvdata(this->device, dev); 601 if (!mdev) 602 return 0; 603 604 if (!MLX5_CAP_GEN(mdev, vport_group_manager) || 605 !MLX5_CAP_GEN(mdev, lag_master) || 606 (MLX5_CAP_GEN(mdev, num_lag_ports) > MLX5_MAX_PORTS || 607 MLX5_CAP_GEN(mdev, num_lag_ports) <= 1)) 608 return 0; 609 610 return _next_phys_dev(mdev, data); 611 } 612 613 static struct mlx5_core_dev *mlx5_get_next_dev(struct mlx5_core_dev *dev, 614 int (*match)(struct device *dev, const void *data)) 615 { 616 struct device *next; 617 618 if (!mlx5_core_is_pf(dev)) 619 return NULL; 620 621 next = bus_find_device(&pci_bus_type, NULL, dev, match); 622 if (!next) 623 return NULL; 624 625 put_device(next); 626 return pci_get_drvdata(to_pci_dev(next)); 627 } 628 629 /* Must be called with intf_mutex held */ 630 struct mlx5_core_dev *mlx5_get_next_phys_dev_lag(struct mlx5_core_dev *dev) 631 { 632 lockdep_assert_held(&mlx5_intf_mutex); 633 return mlx5_get_next_dev(dev, &next_phys_dev_lag); 634 } 635 636 void mlx5_dev_list_lock(void) 637 { 638 mutex_lock(&mlx5_intf_mutex); 639 } 640 void mlx5_dev_list_unlock(void) 641 { 642 mutex_unlock(&mlx5_intf_mutex); 643 } 644 645 int mlx5_dev_list_trylock(void) 646 { 647 return mutex_trylock(&mlx5_intf_mutex); 648 } 649