summaryrefslogtreecommitdiff
path: root/drivers/net/ethernet/hisilicon/hns3/hnae3.c
blob: 67b0bf310daaafd1f4a6f4b3bf6c64d06d99e10f (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
// SPDX-License-Identifier: GPL-2.0+
// Copyright (c) 2016-2017 Hisilicon Limited.

#include <linux/list.h>
#include <linux/spinlock.h>

#include "hnae3.h"

static LIST_HEAD(hnae3_ae_algo_list);
static LIST_HEAD(hnae3_client_list);
static LIST_HEAD(hnae3_ae_dev_list);

void hnae3_unregister_ae_algo_prepare(struct hnae3_ae_algo *ae_algo)
{
	const struct pci_device_id *pci_id;
	struct hnae3_ae_dev *ae_dev;

	if (!ae_algo)
		return;

	list_for_each_entry(ae_dev, &hnae3_ae_dev_list, node) {
		if (!hnae3_get_bit(ae_dev->flag, HNAE3_DEV_INITED_B))
			continue;

		pci_id = pci_match_id(ae_algo->pdev_id_table, ae_dev->pdev);
		if (!pci_id)
			continue;
		if (IS_ENABLED(CONFIG_PCI_IOV))
			pci_disable_sriov(ae_dev->pdev);
	}
}
EXPORT_SYMBOL(hnae3_unregister_ae_algo_prepare);

/* we are keeping things simple and using single lock for all the
 * list. This is a non-critical code so other updations, if happen
 * in parallel, can wait.
 */
static DEFINE_MUTEX(hnae3_common_lock);

static bool hnae3_client_match(enum hnae3_client_type client_type)
{
	if (client_type == HNAE3_CLIENT_KNIC ||
	    client_type == HNAE3_CLIENT_ROCE)
		return true;

	return false;
}

void hnae3_set_client_init_flag(struct hnae3_client *client,
				struct hnae3_ae_dev *ae_dev,
				unsigned int inited)
{
	if (!client || !ae_dev)
		return;

	switch (client->type) {
	case HNAE3_CLIENT_KNIC:
		hnae3_set_bit(ae_dev->flag, HNAE3_KNIC_CLIENT_INITED_B, inited);
		break;
	case HNAE3_CLIENT_ROCE:
		hnae3_set_bit(ae_dev->flag, HNAE3_ROCE_CLIENT_INITED_B, inited);
		break;
	default:
		break;
	}
}
EXPORT_SYMBOL(hnae3_set_client_init_flag);

static int hnae3_get_client_init_flag(struct hnae3_client *client,
				      struct hnae3_ae_dev *ae_dev)
{
	int inited = 0;

	switch (client->type) {
	case HNAE3_CLIENT_KNIC:
		inited = hnae3_get_bit(ae_dev->flag,
				       HNAE3_KNIC_CLIENT_INITED_B);
		break;
	case HNAE3_CLIENT_ROCE:
		inited = hnae3_get_bit(ae_dev->flag,
				       HNAE3_ROCE_CLIENT_INITED_B);
		break;
	default:
		break;
	}

	return inited;
}

static int hnae3_init_client_instance(struct hnae3_client *client,
				      struct hnae3_ae_dev *ae_dev)
{
	int ret;

	/* check if this client matches the type of ae_dev */
	if (!(hnae3_client_match(client->type) &&
	      hnae3_get_bit(ae_dev->flag, HNAE3_DEV_INITED_B))) {
		return 0;
	}

	ret = ae_dev->ops->init_client_instance(client, ae_dev);
	if (ret)
		dev_err(&ae_dev->pdev->dev,
			"fail to instantiate client, ret = %d\n", ret);

	return ret;
}

static void hnae3_uninit_client_instance(struct hnae3_client *client,
					 struct hnae3_ae_dev *ae_dev)
{
	/* check if this client matches the type of ae_dev */
	if (!(hnae3_client_match(client->type) &&
	      hnae3_get_bit(ae_dev->flag, HNAE3_DEV_INITED_B)))
		return;

	if (hnae3_get_client_init_flag(client, ae_dev)) {
		ae_dev->ops->uninit_client_instance(client, ae_dev);

		hnae3_set_client_init_flag(client, ae_dev, 0);
	}
}

int hnae3_register_client(struct hnae3_client *client)
{
	struct hnae3_client *client_tmp;
	struct hnae3_ae_dev *ae_dev;

	if (!client)
		return -ENODEV;

	mutex_lock(&hnae3_common_lock);
	/* one system should only have one client for every type */
	list_for_each_entry(client_tmp, &hnae3_client_list, node) {
		if (client_tmp->type == client->type)
			goto exit;
	}

	list_add_tail(&client->node, &hnae3_client_list);

	/* initialize the client on every matched port */
	list_for_each_entry(ae_dev, &hnae3_ae_dev_list, node) {
		/* if the client could not be initialized on current port, for
		 * any error reasons, move on to next available port
		 */
		int ret = hnae3_init_client_instance(client, ae_dev);
		if (ret)
			dev_err(&ae_dev->pdev->dev,
				"match and instantiation failed for port, ret = %d\n",
				ret);
	}

exit:
	mutex_unlock(&hnae3_common_lock);

	return 0;
}
EXPORT_SYMBOL(hnae3_register_client);

void hnae3_unregister_client(struct hnae3_client *client)
{
	struct hnae3_client *client_tmp;
	struct hnae3_ae_dev *ae_dev;
	bool existed = false;

	if (!client)
		return;

	mutex_lock(&hnae3_common_lock);
	/* one system should only have one client for every type */
	list_for_each_entry(client_tmp, &hnae3_client_list, node) {
		if (client_tmp->type == client->type) {
			existed = true;
			break;
		}
	}

	if (!existed) {
		mutex_unlock(&hnae3_common_lock);
		pr_err("client %s does not exist!\n", client->name);
		return;
	}

	/* un-initialize the client on every matched port */
	list_for_each_entry(ae_dev, &hnae3_ae_dev_list, node) {
		hnae3_uninit_client_instance(client, ae_dev);
	}

	list_del(&client->node);
	mutex_unlock(&hnae3_common_lock);
}
EXPORT_SYMBOL(hnae3_unregister_client);

/* hnae3_register_ae_algo - register a AE algorithm to hnae3 framework
 * @ae_algo: AE algorithm
 * NOTE: the duplicated name will not be checked
 */
void hnae3_register_ae_algo(struct hnae3_ae_algo *ae_algo)
{
	const struct pci_device_id *id;
	struct hnae3_ae_dev *ae_dev;
	struct hnae3_client *client;
	int ret;

	if (!ae_algo)
		return;

	mutex_lock(&hnae3_common_lock);

	list_add_tail(&ae_algo->node, &hnae3_ae_algo_list);

	/* Check if this algo/ops matches the list of ae_devs */
	list_for_each_entry(ae_dev, &hnae3_ae_dev_list, node) {
		id = pci_match_id(ae_algo->pdev_id_table, ae_dev->pdev);
		if (!id)
			continue;

		if (!ae_algo->ops) {
			dev_err(&ae_dev->pdev->dev, "ae_algo ops are null\n");
			continue;
		}
		ae_dev->ops = ae_algo->ops;

		ret = ae_algo->ops->init_ae_dev(ae_dev);
		if (ret) {
			dev_err(&ae_dev->pdev->dev,
				"init ae_dev error, ret = %d\n", ret);
			continue;
		}

		/* ae_dev init should set flag */
		hnae3_set_bit(ae_dev->flag, HNAE3_DEV_INITED_B, 1);

		/* check the client list for the match with this ae_dev type and
		 * initialize the figure out client instance
		 */
		list_for_each_entry(client, &hnae3_client_list, node) {
			ret = hnae3_init_client_instance(client, ae_dev);
			if (ret)
				dev_err(&ae_dev->pdev->dev,
					"match and instantiation failed, ret = %d\n",
					ret);
		}
	}

	mutex_unlock(&hnae3_common_lock);
}
EXPORT_SYMBOL(hnae3_register_ae_algo);

/* hnae3_unregister_ae_algo - unregisters a AE algorithm
 * @ae_algo: the AE algorithm to unregister
 */
void hnae3_unregister_ae_algo(struct hnae3_ae_algo *ae_algo)
{
	const struct pci_device_id *id;
	struct hnae3_ae_dev *ae_dev;
	struct hnae3_client *client;

	if (!ae_algo)
		return;

	mutex_lock(&hnae3_common_lock);
	/* Check if there are matched ae_dev */
	list_for_each_entry(ae_dev, &hnae3_ae_dev_list, node) {
		if (!hnae3_get_bit(ae_dev->flag, HNAE3_DEV_INITED_B))
			continue;

		id = pci_match_id(ae_algo->pdev_id_table, ae_dev->pdev);
		if (!id)
			continue;

		/* check the client list for the match with this ae_dev type and
		 * un-initialize the figure out client instance
		 */
		list_for_each_entry(client, &hnae3_client_list, node)
			hnae3_uninit_client_instance(client, ae_dev);

		ae_algo->ops->uninit_ae_dev(ae_dev);
		hnae3_set_bit(ae_dev->flag, HNAE3_DEV_INITED_B, 0);
		ae_dev->ops = NULL;
	}

	list_del(&ae_algo->node);
	mutex_unlock(&hnae3_common_lock);
}
EXPORT_SYMBOL(hnae3_unregister_ae_algo);

/* hnae3_register_ae_dev - registers a AE device to hnae3 framework
 * @ae_dev: the AE device
 * NOTE: the duplicated name will not be checked
 */
int hnae3_register_ae_dev(struct hnae3_ae_dev *ae_dev)
{
	const struct pci_device_id *id;
	struct hnae3_ae_algo *ae_algo;
	struct hnae3_client *client;
	int ret;

	if (!ae_dev)
		return -ENODEV;

	mutex_lock(&hnae3_common_lock);

	list_add_tail(&ae_dev->node, &hnae3_ae_dev_list);

	/* Check if there are matched ae_algo */
	list_for_each_entry(ae_algo, &hnae3_ae_algo_list, node) {
		id = pci_match_id(ae_algo->pdev_id_table, ae_dev->pdev);
		if (!id)
			continue;

		if (!ae_algo->ops) {
			dev_err(&ae_dev->pdev->dev, "ae_algo ops are null\n");
			ret = -EOPNOTSUPP;
			goto out_err;
		}
		ae_dev->ops = ae_algo->ops;

		ret = ae_dev->ops->init_ae_dev(ae_dev);
		if (ret) {
			dev_err(&ae_dev->pdev->dev,
				"init ae_dev error, ret = %d\n", ret);
			goto out_err;
		}

		/* ae_dev init should set flag */
		hnae3_set_bit(ae_dev->flag, HNAE3_DEV_INITED_B, 1);
		break;
	}

	/* check the client list for the match with this ae_dev type and
	 * initialize the figure out client instance
	 */
	list_for_each_entry(client, &hnae3_client_list, node) {
		ret = hnae3_init_client_instance(client, ae_dev);
		if (ret)
			dev_err(&ae_dev->pdev->dev,
				"match and instantiation failed, ret = %d\n",
				ret);
	}

	mutex_unlock(&hnae3_common_lock);

	return 0;

out_err:
	list_del(&ae_dev->node);
	mutex_unlock(&hnae3_common_lock);

	return ret;
}
EXPORT_SYMBOL(hnae3_register_ae_dev);

/* hnae3_unregister_ae_dev - unregisters a AE device
 * @ae_dev: the AE device to unregister
 */
void hnae3_unregister_ae_dev(struct hnae3_ae_dev *ae_dev)
{
	const struct pci_device_id *id;
	struct hnae3_ae_algo *ae_algo;
	struct hnae3_client *client;

	if (!ae_dev)
		return;

	mutex_lock(&hnae3_common_lock);
	/* Check if there are matched ae_algo */
	list_for_each_entry(ae_algo, &hnae3_ae_algo_list, node) {
		if (!hnae3_get_bit(ae_dev->flag, HNAE3_DEV_INITED_B))
			continue;

		id = pci_match_id(ae_algo->pdev_id_table, ae_dev->pdev);
		if (!id)
			continue;

		list_for_each_entry(client, &hnae3_client_list, node)
			hnae3_uninit_client_instance(client, ae_dev);

		ae_algo->ops->uninit_ae_dev(ae_dev);
		hnae3_set_bit(ae_dev->flag, HNAE3_DEV_INITED_B, 0);
		ae_dev->ops = NULL;
	}

	list_del(&ae_dev->node);
	mutex_unlock(&hnae3_common_lock);
}
EXPORT_SYMBOL(hnae3_unregister_ae_dev);

MODULE_AUTHOR("Huawei Tech. Co., Ltd.");
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION("HNAE3(Hisilicon Network Acceleration Engine) Framework");
MODULE_VERSION(HNAE3_MOD_VERSION);