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
is_eth_rep_supported(struct mlx5_core_dev * dev)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
is_eth_supported(struct mlx5_core_dev * dev)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 (MLX5_CAP_GEN(dev, port_type) != MLX5_CAP_PORT_TYPE_ETH)
62 return false;
63
64 if (!MLX5_CAP_GEN(dev, eth_net_offloads)) {
65 mlx5_core_warn(dev, "Missing eth_net_offloads capability\n");
66 return false;
67 }
68
69 if (!MLX5_CAP_GEN(dev, nic_flow_table)) {
70 mlx5_core_warn(dev, "Missing nic_flow_table capability\n");
71 return false;
72 }
73
74 if (!MLX5_CAP_ETH(dev, csum_cap)) {
75 mlx5_core_warn(dev, "Missing csum_cap capability\n");
76 return false;
77 }
78
79 if (!MLX5_CAP_ETH(dev, max_lso_cap)) {
80 mlx5_core_warn(dev, "Missing max_lso_cap capability\n");
81 return false;
82 }
83
84 if (!MLX5_CAP_ETH(dev, vlan_cap)) {
85 mlx5_core_warn(dev, "Missing vlan_cap capability\n");
86 return false;
87 }
88
89 if (!MLX5_CAP_ETH(dev, rss_ind_tbl_cap)) {
90 mlx5_core_warn(dev, "Missing rss_ind_tbl_cap capability\n");
91 return false;
92 }
93
94 if (MLX5_CAP_FLOWTABLE(dev,
95 flow_table_properties_nic_receive.max_ft_level) < 3) {
96 mlx5_core_warn(dev, "max_ft_level < 3\n");
97 return false;
98 }
99
100 if (!MLX5_CAP_ETH(dev, self_lb_en_modifiable))
101 mlx5_core_warn(dev, "Self loop back prevention is not supported\n");
102 if (!MLX5_CAP_GEN(dev, cq_moderation))
103 mlx5_core_warn(dev, "CQ moderation is not supported\n");
104
105 return true;
106 }
107
is_vnet_supported(struct mlx5_core_dev * dev)108 static bool is_vnet_supported(struct mlx5_core_dev *dev)
109 {
110 if (!IS_ENABLED(CONFIG_MLX5_VDPA_NET))
111 return false;
112
113 if (mlx5_core_is_pf(dev))
114 return false;
115
116 if (!(MLX5_CAP_GEN_64(dev, general_obj_types) &
117 MLX5_GENERAL_OBJ_TYPES_CAP_VIRTIO_NET_Q))
118 return false;
119
120 if (!(MLX5_CAP_DEV_VDPA_EMULATION(dev, event_mode) &
121 MLX5_VIRTIO_Q_EVENT_MODE_QP_MODE))
122 return false;
123
124 if (!MLX5_CAP_DEV_VDPA_EMULATION(dev, eth_frame_offload_type))
125 return false;
126
127 return true;
128 }
129
is_ib_rep_supported(struct mlx5_core_dev * dev)130 static bool is_ib_rep_supported(struct mlx5_core_dev *dev)
131 {
132 if (!IS_ENABLED(CONFIG_MLX5_INFINIBAND))
133 return false;
134
135 if (dev->priv.flags & MLX5_PRIV_FLAGS_DISABLE_IB_ADEV)
136 return false;
137
138 if (!is_eth_rep_supported(dev))
139 return false;
140
141 if (!MLX5_ESWITCH_MANAGER(dev))
142 return false;
143
144 if (!is_mdev_switchdev_mode(dev))
145 return false;
146
147 if (mlx5_core_mp_enabled(dev))
148 return false;
149
150 return true;
151 }
152
is_mp_supported(struct mlx5_core_dev * dev)153 static bool is_mp_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_ib_rep_supported(dev))
162 return false;
163
164 if (MLX5_CAP_GEN(dev, port_type) != MLX5_CAP_PORT_TYPE_ETH)
165 return false;
166
167 if (!mlx5_core_is_mp_slave(dev))
168 return false;
169
170 return true;
171 }
172
is_ib_supported(struct mlx5_core_dev * dev)173 static bool is_ib_supported(struct mlx5_core_dev *dev)
174 {
175 if (!IS_ENABLED(CONFIG_MLX5_INFINIBAND))
176 return false;
177
178 if (dev->priv.flags & MLX5_PRIV_FLAGS_DISABLE_IB_ADEV)
179 return false;
180
181 if (is_ib_rep_supported(dev))
182 return false;
183
184 if (is_mp_supported(dev))
185 return false;
186
187 return true;
188 }
189
190 enum {
191 MLX5_INTERFACE_PROTOCOL_ETH,
192 MLX5_INTERFACE_PROTOCOL_ETH_REP,
193
194 MLX5_INTERFACE_PROTOCOL_IB,
195 MLX5_INTERFACE_PROTOCOL_IB_REP,
196 MLX5_INTERFACE_PROTOCOL_MPIB,
197
198 MLX5_INTERFACE_PROTOCOL_VNET,
199 };
200
201 static const struct mlx5_adev_device {
202 const char *suffix;
203 bool (*is_supported)(struct mlx5_core_dev *dev);
204 } mlx5_adev_devices[] = {
205 [MLX5_INTERFACE_PROTOCOL_VNET] = { .suffix = "vnet",
206 .is_supported = &is_vnet_supported },
207 [MLX5_INTERFACE_PROTOCOL_IB] = { .suffix = "rdma",
208 .is_supported = &is_ib_supported },
209 [MLX5_INTERFACE_PROTOCOL_ETH] = { .suffix = "eth",
210 .is_supported = &is_eth_supported },
211 [MLX5_INTERFACE_PROTOCOL_ETH_REP] = { .suffix = "eth-rep",
212 .is_supported = &is_eth_rep_supported },
213 [MLX5_INTERFACE_PROTOCOL_IB_REP] = { .suffix = "rdma-rep",
214 .is_supported = &is_ib_rep_supported },
215 [MLX5_INTERFACE_PROTOCOL_MPIB] = { .suffix = "multiport",
216 .is_supported = &is_mp_supported },
217 };
218
mlx5_adev_idx_alloc(void)219 int mlx5_adev_idx_alloc(void)
220 {
221 return ida_alloc(&mlx5_adev_ida, GFP_KERNEL);
222 }
223
mlx5_adev_idx_free(int idx)224 void mlx5_adev_idx_free(int idx)
225 {
226 ida_free(&mlx5_adev_ida, idx);
227 }
228
mlx5_adev_init(struct mlx5_core_dev * dev)229 int mlx5_adev_init(struct mlx5_core_dev *dev)
230 {
231 struct mlx5_priv *priv = &dev->priv;
232
233 priv->adev = kcalloc(ARRAY_SIZE(mlx5_adev_devices),
234 sizeof(struct mlx5_adev *), GFP_KERNEL);
235 if (!priv->adev)
236 return -ENOMEM;
237
238 return 0;
239 }
240
mlx5_adev_cleanup(struct mlx5_core_dev * dev)241 void mlx5_adev_cleanup(struct mlx5_core_dev *dev)
242 {
243 struct mlx5_priv *priv = &dev->priv;
244
245 kfree(priv->adev);
246 }
247
adev_release(struct device * dev)248 static void adev_release(struct device *dev)
249 {
250 struct mlx5_adev *mlx5_adev =
251 container_of(dev, struct mlx5_adev, adev.dev);
252 struct mlx5_priv *priv = &mlx5_adev->mdev->priv;
253 int idx = mlx5_adev->idx;
254
255 kfree(mlx5_adev);
256 priv->adev[idx] = NULL;
257 }
258
add_adev(struct mlx5_core_dev * dev,int idx)259 static struct mlx5_adev *add_adev(struct mlx5_core_dev *dev, int idx)
260 {
261 const char *suffix = mlx5_adev_devices[idx].suffix;
262 struct auxiliary_device *adev;
263 struct mlx5_adev *madev;
264 int ret;
265
266 madev = kzalloc(sizeof(*madev), GFP_KERNEL);
267 if (!madev)
268 return ERR_PTR(-ENOMEM);
269
270 adev = &madev->adev;
271 adev->id = dev->priv.adev_idx;
272 adev->name = suffix;
273 adev->dev.parent = dev->device;
274 adev->dev.release = adev_release;
275 madev->mdev = dev;
276 madev->idx = idx;
277
278 ret = auxiliary_device_init(adev);
279 if (ret) {
280 kfree(madev);
281 return ERR_PTR(ret);
282 }
283
284 ret = auxiliary_device_add(adev);
285 if (ret) {
286 auxiliary_device_uninit(adev);
287 return ERR_PTR(ret);
288 }
289 return madev;
290 }
291
del_adev(struct auxiliary_device * adev)292 static void del_adev(struct auxiliary_device *adev)
293 {
294 auxiliary_device_delete(adev);
295 auxiliary_device_uninit(adev);
296 }
297
mlx5_attach_device(struct mlx5_core_dev * dev)298 int mlx5_attach_device(struct mlx5_core_dev *dev)
299 {
300 struct mlx5_priv *priv = &dev->priv;
301 struct auxiliary_device *adev;
302 struct auxiliary_driver *adrv;
303 int ret = 0, i;
304
305 mutex_lock(&mlx5_intf_mutex);
306 for (i = 0; i < ARRAY_SIZE(mlx5_adev_devices); i++) {
307 if (!priv->adev[i]) {
308 bool is_supported = false;
309
310 if (mlx5_adev_devices[i].is_supported)
311 is_supported = mlx5_adev_devices[i].is_supported(dev);
312
313 if (!is_supported)
314 continue;
315
316 priv->adev[i] = add_adev(dev, i);
317 if (IS_ERR(priv->adev[i])) {
318 ret = PTR_ERR(priv->adev[i]);
319 priv->adev[i] = NULL;
320 }
321 } else {
322 adev = &priv->adev[i]->adev;
323 adrv = to_auxiliary_drv(adev->dev.driver);
324
325 if (adrv->resume)
326 ret = adrv->resume(adev);
327 }
328 if (ret) {
329 mlx5_core_warn(dev, "Device[%d] (%s) failed to load\n",
330 i, mlx5_adev_devices[i].suffix);
331
332 break;
333 }
334 }
335 mutex_unlock(&mlx5_intf_mutex);
336 return ret;
337 }
338
mlx5_detach_device(struct mlx5_core_dev * dev)339 void mlx5_detach_device(struct mlx5_core_dev *dev)
340 {
341 struct mlx5_priv *priv = &dev->priv;
342 struct auxiliary_device *adev;
343 struct auxiliary_driver *adrv;
344 pm_message_t pm = {};
345 int i;
346
347 mutex_lock(&mlx5_intf_mutex);
348 for (i = ARRAY_SIZE(mlx5_adev_devices) - 1; i >= 0; i--) {
349 if (!priv->adev[i])
350 continue;
351
352 adev = &priv->adev[i]->adev;
353 adrv = to_auxiliary_drv(adev->dev.driver);
354
355 if (adrv->suspend) {
356 adrv->suspend(adev, pm);
357 continue;
358 }
359
360 del_adev(&priv->adev[i]->adev);
361 priv->adev[i] = NULL;
362 }
363 mutex_unlock(&mlx5_intf_mutex);
364 }
365
mlx5_register_device(struct mlx5_core_dev * dev)366 int mlx5_register_device(struct mlx5_core_dev *dev)
367 {
368 int ret;
369
370 mutex_lock(&mlx5_intf_mutex);
371 dev->priv.flags &= ~MLX5_PRIV_FLAGS_DISABLE_ALL_ADEV;
372 ret = mlx5_rescan_drivers_locked(dev);
373 mutex_unlock(&mlx5_intf_mutex);
374 if (ret)
375 mlx5_unregister_device(dev);
376
377 return ret;
378 }
379
mlx5_unregister_device(struct mlx5_core_dev * dev)380 void mlx5_unregister_device(struct mlx5_core_dev *dev)
381 {
382 mutex_lock(&mlx5_intf_mutex);
383 dev->priv.flags |= MLX5_PRIV_FLAGS_DISABLE_ALL_ADEV;
384 mlx5_rescan_drivers_locked(dev);
385 mutex_unlock(&mlx5_intf_mutex);
386 }
387
add_drivers(struct mlx5_core_dev * dev)388 static int add_drivers(struct mlx5_core_dev *dev)
389 {
390 struct mlx5_priv *priv = &dev->priv;
391 int i, ret = 0;
392
393 for (i = 0; i < ARRAY_SIZE(mlx5_adev_devices); i++) {
394 bool is_supported = false;
395
396 if (priv->adev[i])
397 continue;
398
399 if (mlx5_adev_devices[i].is_supported)
400 is_supported = mlx5_adev_devices[i].is_supported(dev);
401
402 if (!is_supported)
403 continue;
404
405 priv->adev[i] = add_adev(dev, i);
406 if (IS_ERR(priv->adev[i])) {
407 mlx5_core_warn(dev, "Device[%d] (%s) failed to load\n",
408 i, mlx5_adev_devices[i].suffix);
409 /* We continue to rescan drivers and leave to the caller
410 * to make decision if to release everything or continue.
411 */
412 ret = PTR_ERR(priv->adev[i]);
413 priv->adev[i] = NULL;
414 }
415 }
416 return ret;
417 }
418
delete_drivers(struct mlx5_core_dev * dev)419 static void delete_drivers(struct mlx5_core_dev *dev)
420 {
421 struct mlx5_priv *priv = &dev->priv;
422 bool delete_all;
423 int i;
424
425 delete_all = priv->flags & MLX5_PRIV_FLAGS_DISABLE_ALL_ADEV;
426
427 for (i = ARRAY_SIZE(mlx5_adev_devices) - 1; i >= 0; i--) {
428 bool is_supported = false;
429
430 if (!priv->adev[i])
431 continue;
432
433 if (mlx5_adev_devices[i].is_supported && !delete_all)
434 is_supported = mlx5_adev_devices[i].is_supported(dev);
435
436 if (is_supported)
437 continue;
438
439 del_adev(&priv->adev[i]->adev);
440 priv->adev[i] = NULL;
441 }
442 }
443
444 /* This function is used after mlx5_core_dev is reconfigured.
445 */
mlx5_rescan_drivers_locked(struct mlx5_core_dev * dev)446 int mlx5_rescan_drivers_locked(struct mlx5_core_dev *dev)
447 {
448 struct mlx5_priv *priv = &dev->priv;
449
450 lockdep_assert_held(&mlx5_intf_mutex);
451
452 delete_drivers(dev);
453 if (priv->flags & MLX5_PRIV_FLAGS_DISABLE_ALL_ADEV)
454 return 0;
455
456 return add_drivers(dev);
457 }
458
mlx5_gen_pci_id(const struct mlx5_core_dev * dev)459 static u32 mlx5_gen_pci_id(const struct mlx5_core_dev *dev)
460 {
461 return (u32)((pci_domain_nr(dev->pdev->bus) << 16) |
462 (dev->pdev->bus->number << 8) |
463 PCI_SLOT(dev->pdev->devfn));
464 }
465
next_phys_dev(struct device * dev,const void * data)466 static int next_phys_dev(struct device *dev, const void *data)
467 {
468 struct mlx5_adev *madev = container_of(dev, struct mlx5_adev, adev.dev);
469 struct mlx5_core_dev *mdev = madev->mdev;
470 const struct mlx5_core_dev *curr = data;
471
472 if (!mlx5_core_is_pf(mdev))
473 return 0;
474
475 if (mdev == curr)
476 return 0;
477
478 if (mlx5_gen_pci_id(mdev) != mlx5_gen_pci_id(curr))
479 return 0;
480
481 return 1;
482 }
483
484 /* This function is called with two flows:
485 * 1. During initialization of mlx5_core_dev and we don't need to lock it.
486 * 2. During LAG configure stage and caller holds &mlx5_intf_mutex.
487 */
mlx5_get_next_phys_dev(struct mlx5_core_dev * dev)488 struct mlx5_core_dev *mlx5_get_next_phys_dev(struct mlx5_core_dev *dev)
489 {
490 struct auxiliary_device *adev;
491 struct mlx5_adev *madev;
492
493 if (!mlx5_core_is_pf(dev))
494 return NULL;
495
496 adev = auxiliary_find_device(NULL, dev, &next_phys_dev);
497 if (!adev)
498 return NULL;
499
500 madev = container_of(adev, struct mlx5_adev, adev);
501 put_device(&adev->dev);
502 return madev->mdev;
503 }
504
mlx5_dev_list_lock(void)505 void mlx5_dev_list_lock(void)
506 {
507 mutex_lock(&mlx5_intf_mutex);
508 }
mlx5_dev_list_unlock(void)509 void mlx5_dev_list_unlock(void)
510 {
511 mutex_unlock(&mlx5_intf_mutex);
512 }
513
mlx5_dev_list_trylock(void)514 int mlx5_dev_list_trylock(void)
515 {
516 return mutex_trylock(&mlx5_intf_mutex);
517 }
518