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 "mlx5_core.h" 37 38 /* intf dev list mutex */ 39 static DEFINE_MUTEX(mlx5_intf_mutex); 40 static DEFINE_IDA(mlx5_adev_ida); 41 42 static bool is_eth_rep_supported(struct mlx5_core_dev *dev) 43 { 44 if (!IS_ENABLED(CONFIG_MLX5_ESWITCH)) 45 return false; 46 47 if (!MLX5_ESWITCH_MANAGER(dev)) 48 return false; 49 50 if (!is_mdev_switchdev_mode(dev)) 51 return false; 52 53 return true; 54 } 55 56 static bool is_eth_supported(struct mlx5_core_dev *dev) 57 { 58 if (!IS_ENABLED(CONFIG_MLX5_CORE_EN)) 59 return false; 60 61 if (is_eth_rep_supported(dev)) 62 return false; 63 64 if (MLX5_CAP_GEN(dev, port_type) != MLX5_CAP_PORT_TYPE_ETH) 65 return false; 66 67 if (!MLX5_CAP_GEN(dev, eth_net_offloads)) { 68 mlx5_core_warn(dev, "Missing eth_net_offloads capability\n"); 69 return false; 70 } 71 72 if (!MLX5_CAP_GEN(dev, nic_flow_table)) { 73 mlx5_core_warn(dev, "Missing nic_flow_table capability\n"); 74 return false; 75 } 76 77 if (!MLX5_CAP_ETH(dev, csum_cap)) { 78 mlx5_core_warn(dev, "Missing csum_cap capability\n"); 79 return false; 80 } 81 82 if (!MLX5_CAP_ETH(dev, max_lso_cap)) { 83 mlx5_core_warn(dev, "Missing max_lso_cap capability\n"); 84 return false; 85 } 86 87 if (!MLX5_CAP_ETH(dev, vlan_cap)) { 88 mlx5_core_warn(dev, "Missing vlan_cap capability\n"); 89 return false; 90 } 91 92 if (!MLX5_CAP_ETH(dev, rss_ind_tbl_cap)) { 93 mlx5_core_warn(dev, "Missing rss_ind_tbl_cap capability\n"); 94 return false; 95 } 96 97 if (MLX5_CAP_FLOWTABLE(dev, 98 flow_table_properties_nic_receive.max_ft_level) < 3) { 99 mlx5_core_warn(dev, "max_ft_level < 3\n"); 100 return false; 101 } 102 103 if (!MLX5_CAP_ETH(dev, self_lb_en_modifiable)) 104 mlx5_core_warn(dev, "Self loop back prevention is not supported\n"); 105 if (!MLX5_CAP_GEN(dev, cq_moderation)) 106 mlx5_core_warn(dev, "CQ moderation is not supported\n"); 107 108 return true; 109 } 110 111 static bool is_vnet_supported(struct mlx5_core_dev *dev) 112 { 113 if (!IS_ENABLED(CONFIG_MLX5_VDPA_NET)) 114 return false; 115 116 if (mlx5_core_is_pf(dev)) 117 return false; 118 119 if (!(MLX5_CAP_GEN_64(dev, general_obj_types) & 120 MLX5_GENERAL_OBJ_TYPES_CAP_VIRTIO_NET_Q)) 121 return false; 122 123 if (!(MLX5_CAP_DEV_VDPA_EMULATION(dev, event_mode) & 124 MLX5_VIRTIO_Q_EVENT_MODE_QP_MODE)) 125 return false; 126 127 if (!MLX5_CAP_DEV_VDPA_EMULATION(dev, eth_frame_offload_type)) 128 return false; 129 130 return true; 131 } 132 133 static bool is_ib_rep_supported(struct mlx5_core_dev *dev) 134 { 135 if (!IS_ENABLED(CONFIG_MLX5_INFINIBAND)) 136 return false; 137 138 if (dev->priv.flags & MLX5_PRIV_FLAGS_DISABLE_IB_ADEV) 139 return false; 140 141 if (!is_eth_rep_supported(dev)) 142 return false; 143 144 if (!MLX5_ESWITCH_MANAGER(dev)) 145 return false; 146 147 if (!is_mdev_switchdev_mode(dev)) 148 return false; 149 150 if (mlx5_core_mp_enabled(dev)) 151 return false; 152 153 return true; 154 } 155 156 static bool is_mp_supported(struct mlx5_core_dev *dev) 157 { 158 if (!IS_ENABLED(CONFIG_MLX5_INFINIBAND)) 159 return false; 160 161 if (dev->priv.flags & MLX5_PRIV_FLAGS_DISABLE_IB_ADEV) 162 return false; 163 164 if (is_ib_rep_supported(dev)) 165 return false; 166 167 if (MLX5_CAP_GEN(dev, port_type) != MLX5_CAP_PORT_TYPE_ETH) 168 return false; 169 170 if (!mlx5_core_is_mp_slave(dev)) 171 return false; 172 173 return true; 174 } 175 176 static bool is_ib_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 (is_mp_supported(dev)) 188 return false; 189 190 return true; 191 } 192 193 enum { 194 MLX5_INTERFACE_PROTOCOL_ETH_REP, 195 MLX5_INTERFACE_PROTOCOL_ETH, 196 197 MLX5_INTERFACE_PROTOCOL_IB_REP, 198 MLX5_INTERFACE_PROTOCOL_MPIB, 199 MLX5_INTERFACE_PROTOCOL_IB, 200 201 MLX5_INTERFACE_PROTOCOL_VNET, 202 }; 203 204 static const struct mlx5_adev_device { 205 const char *suffix; 206 bool (*is_supported)(struct mlx5_core_dev *dev); 207 } mlx5_adev_devices[] = { 208 [MLX5_INTERFACE_PROTOCOL_VNET] = { .suffix = "vnet", 209 .is_supported = &is_vnet_supported }, 210 [MLX5_INTERFACE_PROTOCOL_IB] = { .suffix = "rdma", 211 .is_supported = &is_ib_supported }, 212 [MLX5_INTERFACE_PROTOCOL_ETH] = { .suffix = "eth", 213 .is_supported = &is_eth_supported }, 214 [MLX5_INTERFACE_PROTOCOL_ETH_REP] = { .suffix = "eth-rep", 215 .is_supported = &is_eth_rep_supported }, 216 [MLX5_INTERFACE_PROTOCOL_IB_REP] = { .suffix = "rdma-rep", 217 .is_supported = &is_ib_rep_supported }, 218 [MLX5_INTERFACE_PROTOCOL_MPIB] = { .suffix = "multiport", 219 .is_supported = &is_mp_supported }, 220 }; 221 222 int mlx5_adev_idx_alloc(void) 223 { 224 return ida_alloc(&mlx5_adev_ida, GFP_KERNEL); 225 } 226 227 void mlx5_adev_idx_free(int idx) 228 { 229 ida_free(&mlx5_adev_ida, idx); 230 } 231 232 int mlx5_adev_init(struct mlx5_core_dev *dev) 233 { 234 struct mlx5_priv *priv = &dev->priv; 235 236 priv->adev = kcalloc(ARRAY_SIZE(mlx5_adev_devices), 237 sizeof(struct mlx5_adev *), GFP_KERNEL); 238 if (!priv->adev) 239 return -ENOMEM; 240 241 return 0; 242 } 243 244 void mlx5_adev_cleanup(struct mlx5_core_dev *dev) 245 { 246 struct mlx5_priv *priv = &dev->priv; 247 248 kfree(priv->adev); 249 } 250 251 static void adev_release(struct device *dev) 252 { 253 struct mlx5_adev *mlx5_adev = 254 container_of(dev, struct mlx5_adev, adev.dev); 255 struct mlx5_priv *priv = &mlx5_adev->mdev->priv; 256 int idx = mlx5_adev->idx; 257 258 kfree(mlx5_adev); 259 priv->adev[idx] = NULL; 260 } 261 262 static struct mlx5_adev *add_adev(struct mlx5_core_dev *dev, int idx) 263 { 264 const char *suffix = mlx5_adev_devices[idx].suffix; 265 struct auxiliary_device *adev; 266 struct mlx5_adev *madev; 267 int ret; 268 269 madev = kzalloc(sizeof(*madev), GFP_KERNEL); 270 if (!madev) 271 return ERR_PTR(-ENOMEM); 272 273 adev = &madev->adev; 274 adev->id = dev->priv.adev_idx; 275 adev->name = suffix; 276 adev->dev.parent = dev->device; 277 adev->dev.release = adev_release; 278 madev->mdev = dev; 279 madev->idx = idx; 280 281 ret = auxiliary_device_init(adev); 282 if (ret) { 283 kfree(madev); 284 return ERR_PTR(ret); 285 } 286 287 ret = auxiliary_device_add(adev); 288 if (ret) { 289 auxiliary_device_uninit(adev); 290 return ERR_PTR(ret); 291 } 292 return madev; 293 } 294 295 static void del_adev(struct auxiliary_device *adev) 296 { 297 auxiliary_device_delete(adev); 298 auxiliary_device_uninit(adev); 299 } 300 301 int mlx5_attach_device(struct mlx5_core_dev *dev) 302 { 303 struct mlx5_priv *priv = &dev->priv; 304 struct auxiliary_device *adev; 305 struct auxiliary_driver *adrv; 306 int ret = 0, i; 307 308 mutex_lock(&mlx5_intf_mutex); 309 for (i = 0; i < ARRAY_SIZE(mlx5_adev_devices); i++) { 310 if (!priv->adev[i]) { 311 bool is_supported = false; 312 313 if (mlx5_adev_devices[i].is_supported) 314 is_supported = mlx5_adev_devices[i].is_supported(dev); 315 316 if (!is_supported) 317 continue; 318 319 priv->adev[i] = add_adev(dev, i); 320 if (IS_ERR(priv->adev[i])) { 321 ret = PTR_ERR(priv->adev[i]); 322 priv->adev[i] = NULL; 323 } 324 } else { 325 adev = &priv->adev[i]->adev; 326 adrv = to_auxiliary_drv(adev->dev.driver); 327 328 if (adrv->resume) 329 ret = adrv->resume(adev); 330 } 331 if (ret) { 332 mlx5_core_warn(dev, "Device[%d] (%s) failed to load\n", 333 i, mlx5_adev_devices[i].suffix); 334 335 break; 336 } 337 } 338 mutex_unlock(&mlx5_intf_mutex); 339 return ret; 340 } 341 342 void mlx5_detach_device(struct mlx5_core_dev *dev) 343 { 344 struct mlx5_priv *priv = &dev->priv; 345 struct auxiliary_device *adev; 346 struct auxiliary_driver *adrv; 347 pm_message_t pm = {}; 348 int i; 349 350 mutex_lock(&mlx5_intf_mutex); 351 for (i = ARRAY_SIZE(mlx5_adev_devices) - 1; i >= 0; i--) { 352 if (!priv->adev[i]) 353 continue; 354 355 adev = &priv->adev[i]->adev; 356 adrv = to_auxiliary_drv(adev->dev.driver); 357 358 if (adrv->suspend) { 359 adrv->suspend(adev, pm); 360 continue; 361 } 362 363 del_adev(&priv->adev[i]->adev); 364 priv->adev[i] = NULL; 365 } 366 mutex_unlock(&mlx5_intf_mutex); 367 } 368 369 int mlx5_register_device(struct mlx5_core_dev *dev) 370 { 371 int ret; 372 373 mutex_lock(&mlx5_intf_mutex); 374 dev->priv.flags &= ~MLX5_PRIV_FLAGS_DISABLE_ALL_ADEV; 375 ret = mlx5_rescan_drivers_locked(dev); 376 mutex_unlock(&mlx5_intf_mutex); 377 if (ret) 378 mlx5_unregister_device(dev); 379 380 return ret; 381 } 382 383 void mlx5_unregister_device(struct mlx5_core_dev *dev) 384 { 385 mutex_lock(&mlx5_intf_mutex); 386 dev->priv.flags |= MLX5_PRIV_FLAGS_DISABLE_ALL_ADEV; 387 mlx5_rescan_drivers_locked(dev); 388 mutex_unlock(&mlx5_intf_mutex); 389 } 390 391 static int add_drivers(struct mlx5_core_dev *dev) 392 { 393 struct mlx5_priv *priv = &dev->priv; 394 int i, ret = 0; 395 396 for (i = 0; i < ARRAY_SIZE(mlx5_adev_devices); i++) { 397 bool is_supported = false; 398 399 if (priv->adev[i]) 400 continue; 401 402 if (mlx5_adev_devices[i].is_supported) 403 is_supported = mlx5_adev_devices[i].is_supported(dev); 404 405 if (!is_supported) 406 continue; 407 408 priv->adev[i] = add_adev(dev, i); 409 if (IS_ERR(priv->adev[i])) { 410 mlx5_core_warn(dev, "Device[%d] (%s) failed to load\n", 411 i, mlx5_adev_devices[i].suffix); 412 /* We continue to rescan drivers and leave to the caller 413 * to make decision if to release everything or continue. 414 */ 415 ret = PTR_ERR(priv->adev[i]); 416 priv->adev[i] = NULL; 417 } 418 } 419 return ret; 420 } 421 422 static void delete_drivers(struct mlx5_core_dev *dev) 423 { 424 struct mlx5_priv *priv = &dev->priv; 425 bool delete_all; 426 int i; 427 428 delete_all = priv->flags & MLX5_PRIV_FLAGS_DISABLE_ALL_ADEV; 429 430 for (i = ARRAY_SIZE(mlx5_adev_devices) - 1; i >= 0; i--) { 431 bool is_supported = false; 432 433 if (!priv->adev[i]) 434 continue; 435 436 if (mlx5_adev_devices[i].is_supported && !delete_all) 437 is_supported = mlx5_adev_devices[i].is_supported(dev); 438 439 if (is_supported) 440 continue; 441 442 del_adev(&priv->adev[i]->adev); 443 priv->adev[i] = NULL; 444 } 445 } 446 447 /* This function is used after mlx5_core_dev is reconfigured. 448 */ 449 int mlx5_rescan_drivers_locked(struct mlx5_core_dev *dev) 450 { 451 struct mlx5_priv *priv = &dev->priv; 452 453 lockdep_assert_held(&mlx5_intf_mutex); 454 455 delete_drivers(dev); 456 if (priv->flags & MLX5_PRIV_FLAGS_DISABLE_ALL_ADEV) 457 return 0; 458 459 return add_drivers(dev); 460 } 461 462 static u32 mlx5_gen_pci_id(const struct mlx5_core_dev *dev) 463 { 464 return (u32)((pci_domain_nr(dev->pdev->bus) << 16) | 465 (dev->pdev->bus->number << 8) | 466 PCI_SLOT(dev->pdev->devfn)); 467 } 468 469 static int next_phys_dev(struct device *dev, const void *data) 470 { 471 struct mlx5_adev *madev = container_of(dev, struct mlx5_adev, adev.dev); 472 struct mlx5_core_dev *mdev = madev->mdev; 473 const struct mlx5_core_dev *curr = data; 474 475 if (!mlx5_core_is_pf(mdev)) 476 return 0; 477 478 if (mdev == curr) 479 return 0; 480 481 if (mlx5_gen_pci_id(mdev) != mlx5_gen_pci_id(curr)) 482 return 0; 483 484 return 1; 485 } 486 487 /* This function is called with two flows: 488 * 1. During initialization of mlx5_core_dev and we don't need to lock it. 489 * 2. During LAG configure stage and caller holds &mlx5_intf_mutex. 490 */ 491 struct mlx5_core_dev *mlx5_get_next_phys_dev(struct mlx5_core_dev *dev) 492 { 493 struct auxiliary_device *adev; 494 struct mlx5_adev *madev; 495 496 if (!mlx5_core_is_pf(dev)) 497 return NULL; 498 499 adev = auxiliary_find_device(NULL, dev, &next_phys_dev); 500 if (!adev) 501 return NULL; 502 503 madev = container_of(adev, struct mlx5_adev, adev); 504 put_device(&adev->dev); 505 return madev->mdev; 506 } 507 508 void mlx5_dev_list_lock(void) 509 { 510 mutex_lock(&mlx5_intf_mutex); 511 } 512 void mlx5_dev_list_unlock(void) 513 { 514 mutex_unlock(&mlx5_intf_mutex); 515 } 516 517 int mlx5_dev_list_trylock(void) 518 { 519 return mutex_trylock(&mlx5_intf_mutex); 520 } 521