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 /* intf dev list mutex */
42 static DEFINE_MUTEX(mlx5_intf_mutex);
43 static DEFINE_IDA(mlx5_adev_ida);
44 
is_eth_rep_supported(struct mlx5_core_dev * dev)45 static bool is_eth_rep_supported(struct mlx5_core_dev *dev)
46 {
47 	if (!IS_ENABLED(CONFIG_MLX5_ESWITCH))
48 		return false;
49 
50 	if (!MLX5_ESWITCH_MANAGER(dev))
51 		return false;
52 
53 	if (!is_mdev_switchdev_mode(dev))
54 		return false;
55 
56 	return true;
57 }
58 
mlx5_eth_supported(struct mlx5_core_dev * dev)59 bool mlx5_eth_supported(struct mlx5_core_dev *dev)
60 {
61 	if (!IS_ENABLED(CONFIG_MLX5_CORE_EN))
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 
mlx5_vnet_supported(struct mlx5_core_dev * dev)111 bool mlx5_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 
is_vnet_enabled(struct mlx5_core_dev * dev)133 static bool is_vnet_enabled(struct mlx5_core_dev *dev)
134 {
135 	union devlink_param_value val;
136 	int err;
137 
138 	err = devl_param_driverinit_value_get(priv_to_devlink(dev),
139 					      DEVLINK_PARAM_GENERIC_ID_ENABLE_VNET,
140 					      &val);
141 	return err ? false : val.vbool;
142 }
143 
is_ib_rep_supported(struct mlx5_core_dev * dev)144 static bool is_ib_rep_supported(struct mlx5_core_dev *dev)
145 {
146 	if (!IS_ENABLED(CONFIG_MLX5_INFINIBAND))
147 		return false;
148 
149 	if (dev->priv.flags & MLX5_PRIV_FLAGS_DISABLE_IB_ADEV)
150 		return false;
151 
152 	if (!is_eth_rep_supported(dev))
153 		return false;
154 
155 	if (mlx5_core_mp_enabled(dev))
156 		return false;
157 
158 	return true;
159 }
160 
is_mp_supported(struct mlx5_core_dev * dev)161 static bool is_mp_supported(struct mlx5_core_dev *dev)
162 {
163 	if (!IS_ENABLED(CONFIG_MLX5_INFINIBAND))
164 		return false;
165 
166 	if (dev->priv.flags & MLX5_PRIV_FLAGS_DISABLE_IB_ADEV)
167 		return false;
168 
169 	if (is_ib_rep_supported(dev))
170 		return false;
171 
172 	if (MLX5_CAP_GEN(dev, port_type) != MLX5_CAP_PORT_TYPE_ETH)
173 		return false;
174 
175 	if (!mlx5_core_is_mp_slave(dev))
176 		return false;
177 
178 	return true;
179 }
180 
mlx5_rdma_supported(struct mlx5_core_dev * dev)181 bool mlx5_rdma_supported(struct mlx5_core_dev *dev)
182 {
183 	if (!IS_ENABLED(CONFIG_MLX5_INFINIBAND))
184 		return false;
185 
186 	if (dev->priv.flags & MLX5_PRIV_FLAGS_DISABLE_IB_ADEV)
187 		return false;
188 
189 	if (is_ib_rep_supported(dev))
190 		return false;
191 
192 	if (is_mp_supported(dev))
193 		return false;
194 
195 	return true;
196 }
197 
is_ib_enabled(struct mlx5_core_dev * dev)198 static bool is_ib_enabled(struct mlx5_core_dev *dev)
199 {
200 	union devlink_param_value val;
201 	int err;
202 
203 	err = devl_param_driverinit_value_get(priv_to_devlink(dev),
204 					      DEVLINK_PARAM_GENERIC_ID_ENABLE_RDMA,
205 					      &val);
206 	return err ? false : val.vbool;
207 }
208 
209 enum {
210 	MLX5_INTERFACE_PROTOCOL_ETH,
211 	MLX5_INTERFACE_PROTOCOL_ETH_REP,
212 
213 	MLX5_INTERFACE_PROTOCOL_IB,
214 	MLX5_INTERFACE_PROTOCOL_IB_REP,
215 	MLX5_INTERFACE_PROTOCOL_MPIB,
216 
217 	MLX5_INTERFACE_PROTOCOL_VNET,
218 };
219 
220 static const struct mlx5_adev_device {
221 	const char *suffix;
222 	bool (*is_supported)(struct mlx5_core_dev *dev);
223 	bool (*is_enabled)(struct mlx5_core_dev *dev);
224 } mlx5_adev_devices[] = {
225 	[MLX5_INTERFACE_PROTOCOL_VNET] = { .suffix = "vnet",
226 					   .is_supported = &mlx5_vnet_supported,
227 					   .is_enabled = &is_vnet_enabled },
228 	[MLX5_INTERFACE_PROTOCOL_IB] = { .suffix = "rdma",
229 					 .is_supported = &mlx5_rdma_supported,
230 					 .is_enabled = &is_ib_enabled },
231 	[MLX5_INTERFACE_PROTOCOL_ETH] = { .suffix = "eth",
232 					  .is_supported = &mlx5_eth_supported,
233 					  .is_enabled = &mlx5_core_is_eth_enabled },
234 	[MLX5_INTERFACE_PROTOCOL_ETH_REP] = { .suffix = "eth-rep",
235 					   .is_supported = &is_eth_rep_supported },
236 	[MLX5_INTERFACE_PROTOCOL_IB_REP] = { .suffix = "rdma-rep",
237 					   .is_supported = &is_ib_rep_supported },
238 	[MLX5_INTERFACE_PROTOCOL_MPIB] = { .suffix = "multiport",
239 					   .is_supported = &is_mp_supported },
240 };
241 
mlx5_adev_idx_alloc(void)242 int mlx5_adev_idx_alloc(void)
243 {
244 	return ida_alloc(&mlx5_adev_ida, GFP_KERNEL);
245 }
246 
mlx5_adev_idx_free(int idx)247 void mlx5_adev_idx_free(int idx)
248 {
249 	ida_free(&mlx5_adev_ida, idx);
250 }
251 
mlx5_adev_init(struct mlx5_core_dev * dev)252 int mlx5_adev_init(struct mlx5_core_dev *dev)
253 {
254 	struct mlx5_priv *priv = &dev->priv;
255 
256 	priv->adev = kcalloc(ARRAY_SIZE(mlx5_adev_devices),
257 			     sizeof(struct mlx5_adev *), GFP_KERNEL);
258 	if (!priv->adev)
259 		return -ENOMEM;
260 
261 	return 0;
262 }
263 
mlx5_adev_cleanup(struct mlx5_core_dev * dev)264 void mlx5_adev_cleanup(struct mlx5_core_dev *dev)
265 {
266 	struct mlx5_priv *priv = &dev->priv;
267 
268 	kfree(priv->adev);
269 }
270 
adev_release(struct device * dev)271 static void adev_release(struct device *dev)
272 {
273 	struct mlx5_adev *mlx5_adev =
274 		container_of(dev, struct mlx5_adev, adev.dev);
275 	struct mlx5_priv *priv = &mlx5_adev->mdev->priv;
276 	int idx = mlx5_adev->idx;
277 
278 	kfree(mlx5_adev);
279 	priv->adev[idx] = NULL;
280 }
281 
add_adev(struct mlx5_core_dev * dev,int idx)282 static struct mlx5_adev *add_adev(struct mlx5_core_dev *dev, int idx)
283 {
284 	const char *suffix = mlx5_adev_devices[idx].suffix;
285 	struct auxiliary_device *adev;
286 	struct mlx5_adev *madev;
287 	int ret;
288 
289 	madev = kzalloc(sizeof(*madev), GFP_KERNEL);
290 	if (!madev)
291 		return ERR_PTR(-ENOMEM);
292 
293 	adev = &madev->adev;
294 	adev->id = dev->priv.adev_idx;
295 	adev->name = suffix;
296 	adev->dev.parent = dev->device;
297 	adev->dev.release = adev_release;
298 	madev->mdev = dev;
299 	madev->idx = idx;
300 
301 	ret = auxiliary_device_init(adev);
302 	if (ret) {
303 		kfree(madev);
304 		return ERR_PTR(ret);
305 	}
306 
307 	ret = auxiliary_device_add(adev);
308 	if (ret) {
309 		auxiliary_device_uninit(adev);
310 		return ERR_PTR(ret);
311 	}
312 	return madev;
313 }
314 
del_adev(struct auxiliary_device * adev)315 static void del_adev(struct auxiliary_device *adev)
316 {
317 	auxiliary_device_delete(adev);
318 	auxiliary_device_uninit(adev);
319 }
320 
mlx5_dev_set_lightweight(struct mlx5_core_dev * dev)321 void mlx5_dev_set_lightweight(struct mlx5_core_dev *dev)
322 {
323 	mutex_lock(&mlx5_intf_mutex);
324 	dev->priv.flags |= MLX5_PRIV_FLAGS_DISABLE_ALL_ADEV;
325 	mutex_unlock(&mlx5_intf_mutex);
326 }
327 
mlx5_dev_is_lightweight(struct mlx5_core_dev * dev)328 bool mlx5_dev_is_lightweight(struct mlx5_core_dev *dev)
329 {
330 	return dev->priv.flags & MLX5_PRIV_FLAGS_DISABLE_ALL_ADEV;
331 }
332 
mlx5_attach_device(struct mlx5_core_dev * dev)333 int mlx5_attach_device(struct mlx5_core_dev *dev)
334 {
335 	struct mlx5_priv *priv = &dev->priv;
336 	struct auxiliary_device *adev;
337 	struct auxiliary_driver *adrv;
338 	int ret = 0, i;
339 
340 	devl_assert_locked(priv_to_devlink(dev));
341 	mutex_lock(&mlx5_intf_mutex);
342 	priv->flags &= ~MLX5_PRIV_FLAGS_DETACH;
343 	for (i = 0; i < ARRAY_SIZE(mlx5_adev_devices); i++) {
344 		if (!priv->adev[i]) {
345 			bool is_supported = false;
346 
347 			if (mlx5_adev_devices[i].is_enabled) {
348 				bool enabled;
349 
350 				enabled = mlx5_adev_devices[i].is_enabled(dev);
351 				if (!enabled)
352 					continue;
353 			}
354 
355 			if (mlx5_adev_devices[i].is_supported)
356 				is_supported = mlx5_adev_devices[i].is_supported(dev);
357 
358 			if (!is_supported)
359 				continue;
360 
361 			priv->adev[i] = add_adev(dev, i);
362 			if (IS_ERR(priv->adev[i])) {
363 				ret = PTR_ERR(priv->adev[i]);
364 				priv->adev[i] = NULL;
365 			}
366 		} else {
367 			adev = &priv->adev[i]->adev;
368 
369 			/* Pay attention that this is not PCI driver that
370 			 * mlx5_core_dev is connected, but auxiliary driver.
371 			 */
372 			if (!adev->dev.driver)
373 				continue;
374 			adrv = to_auxiliary_drv(adev->dev.driver);
375 
376 			if (adrv->resume)
377 				ret = adrv->resume(adev);
378 		}
379 		if (ret) {
380 			mlx5_core_warn(dev, "Device[%d] (%s) failed to load\n",
381 				       i, mlx5_adev_devices[i].suffix);
382 
383 			break;
384 		}
385 	}
386 	mutex_unlock(&mlx5_intf_mutex);
387 	return ret;
388 }
389 
mlx5_detach_device(struct mlx5_core_dev * dev,bool suspend)390 void mlx5_detach_device(struct mlx5_core_dev *dev, bool suspend)
391 {
392 	struct mlx5_priv *priv = &dev->priv;
393 	struct auxiliary_device *adev;
394 	struct auxiliary_driver *adrv;
395 	pm_message_t pm = {};
396 	int i;
397 
398 	devl_assert_locked(priv_to_devlink(dev));
399 	mutex_lock(&mlx5_intf_mutex);
400 	for (i = ARRAY_SIZE(mlx5_adev_devices) - 1; i >= 0; i--) {
401 		if (!priv->adev[i])
402 			continue;
403 
404 		if (mlx5_adev_devices[i].is_enabled) {
405 			bool enabled;
406 
407 			enabled = mlx5_adev_devices[i].is_enabled(dev);
408 			if (!enabled)
409 				goto skip_suspend;
410 		}
411 
412 		adev = &priv->adev[i]->adev;
413 		/* Auxiliary driver was unbind manually through sysfs */
414 		if (!adev->dev.driver)
415 			goto skip_suspend;
416 
417 		adrv = to_auxiliary_drv(adev->dev.driver);
418 
419 		if (adrv->suspend && suspend) {
420 			adrv->suspend(adev, pm);
421 			continue;
422 		}
423 
424 skip_suspend:
425 		del_adev(&priv->adev[i]->adev);
426 		priv->adev[i] = NULL;
427 	}
428 	priv->flags |= MLX5_PRIV_FLAGS_DETACH;
429 	mutex_unlock(&mlx5_intf_mutex);
430 }
431 
mlx5_register_device(struct mlx5_core_dev * dev)432 int mlx5_register_device(struct mlx5_core_dev *dev)
433 {
434 	int ret;
435 
436 	devl_assert_locked(priv_to_devlink(dev));
437 	mutex_lock(&mlx5_intf_mutex);
438 	dev->priv.flags &= ~MLX5_PRIV_FLAGS_DISABLE_ALL_ADEV;
439 	ret = mlx5_rescan_drivers_locked(dev);
440 	mutex_unlock(&mlx5_intf_mutex);
441 	if (ret)
442 		mlx5_unregister_device(dev);
443 
444 	return ret;
445 }
446 
mlx5_unregister_device(struct mlx5_core_dev * dev)447 void mlx5_unregister_device(struct mlx5_core_dev *dev)
448 {
449 	devl_assert_locked(priv_to_devlink(dev));
450 	mutex_lock(&mlx5_intf_mutex);
451 	dev->priv.flags = MLX5_PRIV_FLAGS_DISABLE_ALL_ADEV;
452 	mlx5_rescan_drivers_locked(dev);
453 	mutex_unlock(&mlx5_intf_mutex);
454 }
455 
add_drivers(struct mlx5_core_dev * dev)456 static int add_drivers(struct mlx5_core_dev *dev)
457 {
458 	struct mlx5_priv *priv = &dev->priv;
459 	int i, ret = 0;
460 
461 	for (i = 0; i < ARRAY_SIZE(mlx5_adev_devices); i++) {
462 		bool is_supported = false;
463 
464 		if (priv->adev[i])
465 			continue;
466 
467 		if (mlx5_adev_devices[i].is_enabled &&
468 		    !(mlx5_adev_devices[i].is_enabled(dev)))
469 			continue;
470 
471 		if (mlx5_adev_devices[i].is_supported)
472 			is_supported = mlx5_adev_devices[i].is_supported(dev);
473 
474 		if (!is_supported)
475 			continue;
476 
477 		priv->adev[i] = add_adev(dev, i);
478 		if (IS_ERR(priv->adev[i])) {
479 			mlx5_core_warn(dev, "Device[%d] (%s) failed to load\n",
480 				       i, mlx5_adev_devices[i].suffix);
481 			/* We continue to rescan drivers and leave to the caller
482 			 * to make decision if to release everything or continue.
483 			 */
484 			ret = PTR_ERR(priv->adev[i]);
485 			priv->adev[i] = NULL;
486 		}
487 	}
488 	return ret;
489 }
490 
delete_drivers(struct mlx5_core_dev * dev)491 static void delete_drivers(struct mlx5_core_dev *dev)
492 {
493 	struct mlx5_priv *priv = &dev->priv;
494 	bool delete_all;
495 	int i;
496 
497 	delete_all = priv->flags & MLX5_PRIV_FLAGS_DISABLE_ALL_ADEV;
498 
499 	for (i = ARRAY_SIZE(mlx5_adev_devices) - 1; i >= 0; i--) {
500 		bool is_supported = false;
501 
502 		if (!priv->adev[i])
503 			continue;
504 
505 		if (mlx5_adev_devices[i].is_enabled) {
506 			bool enabled;
507 
508 			enabled = mlx5_adev_devices[i].is_enabled(dev);
509 			if (!enabled)
510 				goto del_adev;
511 		}
512 
513 		if (mlx5_adev_devices[i].is_supported && !delete_all)
514 			is_supported = mlx5_adev_devices[i].is_supported(dev);
515 
516 		if (is_supported)
517 			continue;
518 
519 del_adev:
520 		del_adev(&priv->adev[i]->adev);
521 		priv->adev[i] = NULL;
522 	}
523 }
524 
525 /* This function is used after mlx5_core_dev is reconfigured.
526  */
mlx5_rescan_drivers_locked(struct mlx5_core_dev * dev)527 int mlx5_rescan_drivers_locked(struct mlx5_core_dev *dev)
528 {
529 	struct mlx5_priv *priv = &dev->priv;
530 
531 	lockdep_assert_held(&mlx5_intf_mutex);
532 	if (priv->flags & MLX5_PRIV_FLAGS_DETACH)
533 		return 0;
534 
535 	delete_drivers(dev);
536 	if (priv->flags & MLX5_PRIV_FLAGS_DISABLE_ALL_ADEV)
537 		return 0;
538 
539 	return add_drivers(dev);
540 }
541 
mlx5_same_hw_devs(struct mlx5_core_dev * dev,struct mlx5_core_dev * peer_dev)542 bool mlx5_same_hw_devs(struct mlx5_core_dev *dev, struct mlx5_core_dev *peer_dev)
543 {
544 	u64 fsystem_guid, psystem_guid;
545 
546 	fsystem_guid = mlx5_query_nic_system_image_guid(dev);
547 	psystem_guid = mlx5_query_nic_system_image_guid(peer_dev);
548 
549 	return (fsystem_guid && psystem_guid && fsystem_guid == psystem_guid);
550 }
551 
mlx5_gen_pci_id(const struct mlx5_core_dev * dev)552 static u32 mlx5_gen_pci_id(const struct mlx5_core_dev *dev)
553 {
554 	return (u32)((pci_domain_nr(dev->pdev->bus) << 16) |
555 		     (dev->pdev->bus->number << 8) |
556 		     PCI_SLOT(dev->pdev->devfn));
557 }
558 
_next_phys_dev(struct mlx5_core_dev * mdev,const struct mlx5_core_dev * curr)559 static int _next_phys_dev(struct mlx5_core_dev *mdev,
560 			  const struct mlx5_core_dev *curr)
561 {
562 	if (!mlx5_core_is_pf(mdev))
563 		return 0;
564 
565 	if (mdev == curr)
566 		return 0;
567 
568 	if (!mlx5_same_hw_devs(mdev, (struct mlx5_core_dev *)curr) &&
569 	    mlx5_gen_pci_id(mdev) != mlx5_gen_pci_id(curr))
570 		return 0;
571 
572 	return 1;
573 }
574 
pci_get_other_drvdata(struct device * this,struct device * other)575 static void *pci_get_other_drvdata(struct device *this, struct device *other)
576 {
577 	if (this->driver != other->driver)
578 		return NULL;
579 
580 	return pci_get_drvdata(to_pci_dev(other));
581 }
582 
next_phys_dev_lag(struct device * dev,const void * data)583 static int next_phys_dev_lag(struct device *dev, const void *data)
584 {
585 	struct mlx5_core_dev *mdev, *this = (struct mlx5_core_dev *)data;
586 
587 	mdev = pci_get_other_drvdata(this->device, dev);
588 	if (!mdev)
589 		return 0;
590 
591 	if (!mlx5_lag_is_supported(mdev))
592 		return 0;
593 
594 	return _next_phys_dev(mdev, data);
595 }
596 
mlx5_get_next_dev(struct mlx5_core_dev * dev,int (* match)(struct device * dev,const void * data))597 static struct mlx5_core_dev *mlx5_get_next_dev(struct mlx5_core_dev *dev,
598 					       int (*match)(struct device *dev, const void *data))
599 {
600 	struct device *next;
601 
602 	if (!mlx5_core_is_pf(dev))
603 		return NULL;
604 
605 	next = bus_find_device(&pci_bus_type, NULL, dev, match);
606 	if (!next)
607 		return NULL;
608 
609 	put_device(next);
610 	return pci_get_drvdata(to_pci_dev(next));
611 }
612 
613 /* Must be called with intf_mutex held */
mlx5_get_next_phys_dev_lag(struct mlx5_core_dev * dev)614 struct mlx5_core_dev *mlx5_get_next_phys_dev_lag(struct mlx5_core_dev *dev)
615 {
616 	lockdep_assert_held(&mlx5_intf_mutex);
617 	return mlx5_get_next_dev(dev, &next_phys_dev_lag);
618 }
619 
mlx5_dev_list_lock(void)620 void mlx5_dev_list_lock(void)
621 {
622 	mutex_lock(&mlx5_intf_mutex);
623 }
mlx5_dev_list_unlock(void)624 void mlx5_dev_list_unlock(void)
625 {
626 	mutex_unlock(&mlx5_intf_mutex);
627 }
628 
mlx5_dev_list_trylock(void)629 int mlx5_dev_list_trylock(void)
630 {
631 	return mutex_trylock(&mlx5_intf_mutex);
632 }
633