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 
is_eth_rep_supported(struct mlx5_core_dev * dev)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 
mlx5_eth_supported(struct mlx5_core_dev * dev)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 
mlx5_vnet_supported(struct mlx5_core_dev * dev)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 
is_vnet_enabled(struct mlx5_core_dev * dev)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 
is_ib_rep_supported(struct mlx5_core_dev * dev)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 
is_mp_supported(struct mlx5_core_dev * dev)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 
mlx5_rdma_supported(struct mlx5_core_dev * dev)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 
is_ib_enabled(struct mlx5_core_dev * dev)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 
is_dpll_supported(struct mlx5_core_dev * dev)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 
mlx5_adev_idx_alloc(void)257 int mlx5_adev_idx_alloc(void)
258 {
259 	return ida_alloc(&mlx5_adev_ida, GFP_KERNEL);
260 }
261 
mlx5_adev_idx_free(int idx)262 void mlx5_adev_idx_free(int idx)
263 {
264 	ida_free(&mlx5_adev_ida, idx);
265 }
266 
mlx5_adev_init(struct mlx5_core_dev * dev)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 
mlx5_adev_cleanup(struct mlx5_core_dev * dev)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 
adev_release(struct device * dev)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 
add_adev(struct mlx5_core_dev * dev,int idx)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 
del_adev(struct auxiliary_device * adev)330 static void del_adev(struct auxiliary_device *adev)
331 {
332 	auxiliary_device_delete(adev);
333 	auxiliary_device_uninit(adev);
334 }
335 
mlx5_dev_set_lightweight(struct mlx5_core_dev * dev)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 
mlx5_dev_is_lightweight(struct mlx5_core_dev * dev)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 
mlx5_attach_device(struct mlx5_core_dev * dev)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 
mlx5_detach_device(struct mlx5_core_dev * dev,bool suspend)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 
mlx5_register_device(struct mlx5_core_dev * dev)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 
mlx5_unregister_device(struct mlx5_core_dev * dev)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 
add_drivers(struct mlx5_core_dev * dev)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 
delete_drivers(struct mlx5_core_dev * dev)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  */
mlx5_rescan_drivers_locked(struct mlx5_core_dev * dev)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 
mlx5_same_hw_devs(struct mlx5_core_dev * dev,struct mlx5_core_dev * peer_dev)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 }
565