summaryrefslogtreecommitdiffstats
path: root/drivers/net/ethernet/intel/iavf/iavf_client.c
blob: 0c77e4171808a8e95c5af8830032357235899863 (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
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
// SPDX-License-Identifier: GPL-2.0
/* Copyright(c) 2013 - 2018 Intel Corporation. */

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

#include "iavf.h"
#include "iavf_prototype.h"
#include "iavf_client.h"

static
const char iavf_client_interface_version_str[] = IAVF_CLIENT_VERSION_STR;
static struct iavf_client *vf_registered_client;
static LIST_HEAD(iavf_devices);
static DEFINE_MUTEX(iavf_device_mutex);

static u32 iavf_client_virtchnl_send(struct iavf_info *ldev,
				     struct iavf_client *client,
				     u8 *msg, u16 len);

static int iavf_client_setup_qvlist(struct iavf_info *ldev,
				    struct iavf_client *client,
				    struct iavf_qvlist_info *qvlist_info);

static struct iavf_ops iavf_lan_ops = {
	.virtchnl_send = iavf_client_virtchnl_send,
	.setup_qvlist = iavf_client_setup_qvlist,
};

/**
 * iavf_client_get_params - retrieve relevant client parameters
 * @vsi: VSI with parameters
 * @params: client param struct
 **/
static
void iavf_client_get_params(struct iavf_vsi *vsi, struct iavf_params *params)
{
	int i;

	memset(params, 0, sizeof(struct iavf_params));
	params->mtu = vsi->netdev->mtu;
	params->link_up = vsi->back->link_up;

	for (i = 0; i < IAVF_MAX_USER_PRIORITY; i++) {
		params->qos.prio_qos[i].tc = 0;
		params->qos.prio_qos[i].qs_handle = vsi->qs_handle;
	}
}

/**
 * iavf_notify_client_message - call the client message receive callback
 * @vsi: the VSI associated with this client
 * @msg: message buffer
 * @len: length of message
 *
 * If there is a client to this VSI, call the client
 **/
void iavf_notify_client_message(struct iavf_vsi *vsi, u8 *msg, u16 len)
{
	struct iavf_client_instance *cinst;

	if (!vsi)
		return;

	cinst = vsi->back->cinst;
	if (!cinst || !cinst->client || !cinst->client->ops ||
	    !cinst->client->ops->virtchnl_receive) {
		dev_dbg(&vsi->back->pdev->dev,
			"Cannot locate client instance virtchnl_receive function\n");
		return;
	}
	cinst->client->ops->virtchnl_receive(&cinst->lan_info,  cinst->client,
					     msg, len);
}

/**
 * iavf_notify_client_l2_params - call the client notify callback
 * @vsi: the VSI with l2 param changes
 *
 * If there is a client to this VSI, call the client
 **/
void iavf_notify_client_l2_params(struct iavf_vsi *vsi)
{
	struct iavf_client_instance *cinst;
	struct iavf_params params;

	if (!vsi)
		return;

	cinst = vsi->back->cinst;

	if (!cinst || !cinst->client || !cinst->client->ops ||
	    !cinst->client->ops->l2_param_change) {
		dev_dbg(&vsi->back->pdev->dev,
			"Cannot locate client instance l2_param_change function\n");
		return;
	}
	iavf_client_get_params(vsi, &params);
	cinst->lan_info.params = params;
	cinst->client->ops->l2_param_change(&cinst->lan_info, cinst->client,
					    &params);
}

/**
 * iavf_notify_client_open - call the client open callback
 * @vsi: the VSI with netdev opened
 *
 * If there is a client to this netdev, call the client with open
 **/
void iavf_notify_client_open(struct iavf_vsi *vsi)
{
	struct iavf_adapter *adapter = vsi->back;
	struct iavf_client_instance *cinst = adapter->cinst;
	int ret;

	if (!cinst || !cinst->client || !cinst->client->ops ||
	    !cinst->client->ops->open) {
		dev_dbg(&vsi->back->pdev->dev,
			"Cannot locate client instance open function\n");
		return;
	}
	if (!(test_bit(__IAVF_CLIENT_INSTANCE_OPENED, &cinst->state))) {
		ret = cinst->client->ops->open(&cinst->lan_info, cinst->client);
		if (!ret)
			set_bit(__IAVF_CLIENT_INSTANCE_OPENED, &cinst->state);
	}
}

/**
 * iavf_client_release_qvlist - send a message to the PF to release iwarp qv map
 * @ldev: pointer to L2 context.
 *
 * Return 0 on success or < 0 on error
 **/
static int iavf_client_release_qvlist(struct iavf_info *ldev)
{
	struct iavf_adapter *adapter = ldev->vf;
	enum iavf_status err;

	if (adapter->aq_required)
		return -EAGAIN;

	err = iavf_aq_send_msg_to_pf(&adapter->hw,
				     VIRTCHNL_OP_RELEASE_IWARP_IRQ_MAP,
				     IAVF_SUCCESS, NULL, 0, NULL);

	if (err)
		dev_err(&adapter->pdev->dev,
			"Unable to send iWarp vector release message to PF, error %d, aq status %d\n",
			err, adapter->hw.aq.asq_last_status);

	return err;
}

/**
 * iavf_notify_client_close - call the client close callback
 * @vsi: the VSI with netdev closed
 * @reset: true when close called due to reset pending
 *
 * If there is a client to this netdev, call the client with close
 **/
void iavf_notify_client_close(struct iavf_vsi *vsi, bool reset)
{
	struct iavf_adapter *adapter = vsi->back;
	struct iavf_client_instance *cinst = adapter->cinst;

	if (!cinst || !cinst->client || !cinst->client->ops ||
	    !cinst->client->ops->close) {
		dev_dbg(&vsi->back->pdev->dev,
			"Cannot locate client instance close function\n");
		return;
	}
	cinst->client->ops->close(&cinst->lan_info, cinst->client, reset);
	iavf_client_release_qvlist(&cinst->lan_info);
	clear_bit(__IAVF_CLIENT_INSTANCE_OPENED, &cinst->state);
}

/**
 * iavf_client_add_instance - add a client instance to the instance list
 * @adapter: pointer to the board struct
 *
 * Returns cinst ptr on success, NULL on failure
 **/
static struct iavf_client_instance *
iavf_client_add_instance(struct iavf_adapter *adapter)
{
	struct iavf_client_instance *cinst = NULL;
	struct iavf_vsi *vsi = &adapter->vsi;
	struct netdev_hw_addr *mac = NULL;
	struct iavf_params params;

	if (!vf_registered_client)
		goto out;

	if (adapter->cinst) {
		cinst = adapter->cinst;
		goto out;
	}

	cinst = kzalloc(sizeof(*cinst), GFP_KERNEL);
	if (!cinst)
		goto out;

	cinst->lan_info.vf = (void *)adapter;
	cinst->lan_info.netdev = vsi->netdev;
	cinst->lan_info.pcidev = adapter->pdev;
	cinst->lan_info.fid = 0;
	cinst->lan_info.ftype = IAVF_CLIENT_FTYPE_VF;
	cinst->lan_info.hw_addr = adapter->hw.hw_addr;
	cinst->lan_info.ops = &iavf_lan_ops;
	cinst->lan_info.version.major = IAVF_CLIENT_VERSION_MAJOR;
	cinst->lan_info.version.minor = IAVF_CLIENT_VERSION_MINOR;
	cinst->lan_info.version.build = IAVF_CLIENT_VERSION_BUILD;
	iavf_client_get_params(vsi, &params);
	cinst->lan_info.params = params;
	set_bit(__IAVF_CLIENT_INSTANCE_NONE, &cinst->state);

	cinst->lan_info.msix_count = adapter->num_iwarp_msix;
	cinst->lan_info.msix_entries =
			&adapter->msix_entries[adapter->iwarp_base_vector];

	mac = list_first_entry(&cinst->lan_info.netdev->dev_addrs.list,
			       struct netdev_hw_addr, list);
	if (mac)
		ether_addr_copy(cinst->lan_info.lanmac, mac->addr);
	else
		dev_err(&adapter->pdev->dev, "MAC address list is empty!\n");

	cinst->client = vf_registered_client;
	adapter->cinst = cinst;
out:
	return cinst;
}

/**
 * iavf_client_del_instance - removes a client instance from the list
 * @adapter: pointer to the board struct
 *
 **/
static
void iavf_client_del_instance(struct iavf_adapter *adapter)
{
	kfree(adapter->cinst);
	adapter->cinst = NULL;
}

/**
 * iavf_client_subtask - client maintenance work
 * @adapter: board private structure
 **/
void iavf_client_subtask(struct iavf_adapter *adapter)
{
	struct iavf_client *client = vf_registered_client;
	struct iavf_client_instance *cinst;
	int ret = 0;

	if (adapter->state < __IAVF_DOWN)
		return;

	/* first check client is registered */
	if (!client)
		return;

	/* Add the client instance to the instance list */
	cinst = iavf_client_add_instance(adapter);
	if (!cinst)
		return;

	dev_info(&adapter->pdev->dev, "Added instance of Client %s\n",
		 client->name);

	if (!test_bit(__IAVF_CLIENT_INSTANCE_OPENED, &cinst->state)) {
		/* Send an Open request to the client */

		if (client->ops && client->ops->open)
			ret = client->ops->open(&cinst->lan_info, client);
		if (!ret)
			set_bit(__IAVF_CLIENT_INSTANCE_OPENED,
				&cinst->state);
		else
			/* remove client instance */
			iavf_client_del_instance(adapter);
	}
}

/**
 * iavf_lan_add_device - add a lan device struct to the list of lan devices
 * @adapter: pointer to the board struct
 *
 * Returns 0 on success or none 0 on error
 **/
int iavf_lan_add_device(struct iavf_adapter *adapter)
{
	struct iavf_device *ldev;
	int ret = 0;

	mutex_lock(&iavf_device_mutex);
	list_for_each_entry(ldev, &iavf_devices, list) {
		if (ldev->vf == adapter) {
			ret = -EEXIST;
			goto out;
		}
	}
	ldev = kzalloc(sizeof(*ldev), GFP_KERNEL);
	if (!ldev) {
		ret = -ENOMEM;
		goto out;
	}
	ldev->vf = adapter;
	INIT_LIST_HEAD(&ldev->list);
	list_add(&ldev->list, &iavf_devices);
	dev_info(&adapter->pdev->dev, "Added LAN device bus=0x%02x dev=0x%02x func=0x%02x\n",
		 adapter->hw.bus.bus_id, adapter->hw.bus.device,
		 adapter->hw.bus.func);

	/* Since in some cases register may have happened before a device gets
	 * added, we can schedule a subtask to go initiate the clients.
	 */
	adapter->flags |= IAVF_FLAG_SERVICE_CLIENT_REQUESTED;

out:
	mutex_unlock(&iavf_device_mutex);
	return ret;
}

/**
 * iavf_lan_del_device - removes a lan device from the device list
 * @adapter: pointer to the board struct
 *
 * Returns 0 on success or non-0 on error
 **/
int iavf_lan_del_device(struct iavf_adapter *adapter)
{
	struct iavf_device *ldev, *tmp;
	int ret = -ENODEV;

	mutex_lock(&iavf_device_mutex);
	list_for_each_entry_safe(ldev, tmp, &iavf_devices, list) {
		if (ldev->vf == adapter) {
			dev_info(&adapter->pdev->dev,
				 "Deleted LAN device bus=0x%02x dev=0x%02x func=0x%02x\n",
				 adapter->hw.bus.bus_id, adapter->hw.bus.device,
				 adapter->hw.bus.func);
			list_del(&ldev->list);
			kfree(ldev);
			ret = 0;
			break;
		}
	}

	mutex_unlock(&iavf_device_mutex);
	return ret;
}

/**
 * iavf_client_release - release client specific resources
 * @client: pointer to the registered client
 *
 **/
static void iavf_client_release(struct iavf_client *client)
{
	struct iavf_client_instance *cinst;
	struct iavf_device *ldev;
	struct iavf_adapter *adapter;

	mutex_lock(&iavf_device_mutex);
	list_for_each_entry(ldev, &iavf_devices, list) {
		adapter = ldev->vf;
		cinst = adapter->cinst;
		if (!cinst)
			continue;
		if (test_bit(__IAVF_CLIENT_INSTANCE_OPENED, &cinst->state)) {
			if (client->ops && client->ops->close)
				client->ops->close(&cinst->lan_info, client,
						   false);
			iavf_client_release_qvlist(&cinst->lan_info);
			clear_bit(__IAVF_CLIENT_INSTANCE_OPENED, &cinst->state);

			dev_warn(&adapter->pdev->dev,
				 "Client %s instance closed\n", client->name);
		}
		/* delete the client instance */
		iavf_client_del_instance(adapter);
		dev_info(&adapter->pdev->dev, "Deleted client instance of Client %s\n",
			 client->name);
	}
	mutex_unlock(&iavf_device_mutex);
}

/**
 * iavf_client_prepare - prepare client specific resources
 * @client: pointer to the registered client
 *
 **/
static void iavf_client_prepare(struct iavf_client *client)
{
	struct iavf_device *ldev;
	struct iavf_adapter *adapter;

	mutex_lock(&iavf_device_mutex);
	list_for_each_entry(ldev, &iavf_devices, list) {
		adapter = ldev->vf;
		/* Signal the watchdog to service the client */
		adapter->flags |= IAVF_FLAG_SERVICE_CLIENT_REQUESTED;
	}
	mutex_unlock(&iavf_device_mutex);
}

/**
 * iavf_client_virtchnl_send - send a message to the PF instance
 * @ldev: pointer to L2 context.
 * @client: Client pointer.
 * @msg: pointer to message buffer
 * @len: message length
 *
 * Return 0 on success or < 0 on error
 **/
static u32 iavf_client_virtchnl_send(struct iavf_info *ldev,
				     struct iavf_client *client,
				     u8 *msg, u16 len)
{
	struct iavf_adapter *adapter = ldev->vf;
	enum iavf_status err;

	if (adapter->aq_required)
		return -EAGAIN;

	err = iavf_aq_send_msg_to_pf(&adapter->hw, VIRTCHNL_OP_IWARP,
				     IAVF_SUCCESS, msg, len, NULL);
	if (err)
		dev_err(&adapter->pdev->dev, "Unable to send iWarp message to PF, error %d, aq status %d\n",
			err, adapter->hw.aq.asq_last_status);

	return err;
}

/**
 * iavf_client_setup_qvlist - send a message to the PF to setup iwarp qv map
 * @ldev: pointer to L2 context.
 * @client: Client pointer.
 * @qvlist_info: queue and vector list
 *
 * Return 0 on success or < 0 on error
 **/
static int iavf_client_setup_qvlist(struct iavf_info *ldev,
				    struct iavf_client *client,
				    struct iavf_qvlist_info *qvlist_info)
{
	struct virtchnl_iwarp_qvlist_info *v_qvlist_info;
	struct iavf_adapter *adapter = ldev->vf;
	struct iavf_qv_info *qv_info;
	enum iavf_status err;
	u32 v_idx, i;
	size_t msg_size;

	if (adapter->aq_required)
		return -EAGAIN;

	/* A quick check on whether the vectors belong to the client */
	for (i = 0; i < qvlist_info->num_vectors; i++) {
		qv_info = &qvlist_info->qv_info[i];
		if (!qv_info)
			continue;
		v_idx = qv_info->v_idx;
		if ((v_idx >=
		    (adapter->iwarp_base_vector + adapter->num_iwarp_msix)) ||
		    (v_idx < adapter->iwarp_base_vector))
			return -EINVAL;
	}

	v_qvlist_info = (struct virtchnl_iwarp_qvlist_info *)qvlist_info;
	msg_size = struct_size(v_qvlist_info, qv_info,
			       v_qvlist_info->num_vectors - 1);

	adapter->client_pending |= BIT(VIRTCHNL_OP_CONFIG_IWARP_IRQ_MAP);
	err = iavf_aq_send_msg_to_pf(&adapter->hw,
				VIRTCHNL_OP_CONFIG_IWARP_IRQ_MAP, IAVF_SUCCESS,
				(u8 *)v_qvlist_info, msg_size, NULL);

	if (err) {
		dev_err(&adapter->pdev->dev,
			"Unable to send iWarp vector config message to PF, error %d, aq status %d\n",
			err, adapter->hw.aq.asq_last_status);
		goto out;
	}

	err = -EBUSY;
	for (i = 0; i < 5; i++) {
		msleep(100);
		if (!(adapter->client_pending &
		      BIT(VIRTCHNL_OP_CONFIG_IWARP_IRQ_MAP))) {
			err = 0;
			break;
		}
	}
out:
	return err;
}

/**
 * iavf_register_client - Register a iavf client driver with the L2 driver
 * @client: pointer to the iavf_client struct
 *
 * Returns 0 on success or non-0 on error
 **/
int iavf_register_client(struct iavf_client *client)
{
	int ret = 0;

	if (!client) {
		ret = -EIO;
		goto out;
	}

	if (strlen(client->name) == 0) {
		pr_info("iavf: Failed to register client with no name\n");
		ret = -EIO;
		goto out;
	}

	if (vf_registered_client) {
		pr_info("iavf: Client %s has already been registered!\n",
			client->name);
		ret = -EEXIST;
		goto out;
	}

	if ((client->version.major != IAVF_CLIENT_VERSION_MAJOR) ||
	    (client->version.minor != IAVF_CLIENT_VERSION_MINOR)) {
		pr_info("iavf: Failed to register client %s due to mismatched client interface version\n",
			client->name);
		pr_info("Client is using version: %02d.%02d.%02d while LAN driver supports %s\n",
			client->version.major, client->version.minor,
			client->version.build,
			iavf_client_interface_version_str);
		ret = -EIO;
		goto out;
	}

	vf_registered_client = client;

	iavf_client_prepare(client);

	pr_info("iavf: Registered client %s with return code %d\n",
		client->name, ret);
out:
	return ret;
}
EXPORT_SYMBOL(iavf_register_client);

/**
 * iavf_unregister_client - Unregister a iavf client driver with the L2 driver
 * @client: pointer to the iavf_client struct
 *
 * Returns 0 on success or non-0 on error
 **/
int iavf_unregister_client(struct iavf_client *client)
{
	int ret = 0;

	/* When a unregister request comes through we would have to send
	 * a close for each of the client instances that were opened.
	 * client_release function is called to handle this.
	 */
	iavf_client_release(client);

	if (vf_registered_client != client) {
		pr_info("iavf: Client %s has not been registered\n",
			client->name);
		ret = -ENODEV;
		goto out;
	}
	vf_registered_client = NULL;
	pr_info("iavf: Unregistered client %s\n", client->name);
out:
	return ret;
}
EXPORT_SYMBOL(iavf_unregister_client);