summaryrefslogtreecommitdiffstats
path: root/drivers/net/ethernet/netronome/nfp/abm/main.c
blob: 4d4ff5844c4735ef36f5a135e1df190e0089ee24 (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
// SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
/* Copyright (C) 2018 Netronome Systems, Inc. */

#include <linux/bitfield.h>
#include <linux/bitmap.h>
#include <linux/etherdevice.h>
#include <linux/lockdep.h>
#include <linux/netdevice.h>
#include <linux/rcupdate.h>
#include <linux/rtnetlink.h>
#include <linux/slab.h>

#include "../nfpcore/nfp.h"
#include "../nfpcore/nfp_cpp.h"
#include "../nfpcore/nfp_nsp.h"
#include "../nfp_app.h"
#include "../nfp_main.h"
#include "../nfp_net.h"
#include "../nfp_net_repr.h"
#include "../nfp_port.h"
#include "main.h"

static u32 nfp_abm_portid(enum nfp_repr_type rtype, unsigned int id)
{
	return FIELD_PREP(NFP_ABM_PORTID_TYPE, rtype) |
	       FIELD_PREP(NFP_ABM_PORTID_ID, id);
}

static int
nfp_abm_setup_tc(struct nfp_app *app, struct net_device *netdev,
		 enum tc_setup_type type, void *type_data)
{
	struct nfp_repr *repr = netdev_priv(netdev);
	struct nfp_port *port;

	port = nfp_port_from_netdev(netdev);
	if (!port || port->type != NFP_PORT_PF_PORT)
		return -EOPNOTSUPP;

	switch (type) {
	case TC_SETUP_ROOT_QDISC:
		return nfp_abm_setup_root(netdev, repr->app_priv, type_data);
	case TC_SETUP_QDISC_MQ:
		return nfp_abm_setup_tc_mq(netdev, repr->app_priv, type_data);
	case TC_SETUP_QDISC_RED:
		return nfp_abm_setup_tc_red(netdev, repr->app_priv, type_data);
	case TC_SETUP_QDISC_GRED:
		return nfp_abm_setup_tc_gred(netdev, repr->app_priv, type_data);
	case TC_SETUP_BLOCK:
		return nfp_abm_setup_cls_block(netdev, repr, type_data);
	default:
		return -EOPNOTSUPP;
	}
}

static struct net_device *nfp_abm_repr_get(struct nfp_app *app, u32 port_id)
{
	enum nfp_repr_type rtype;
	struct nfp_reprs *reprs;
	u8 port;

	rtype = FIELD_GET(NFP_ABM_PORTID_TYPE, port_id);
	port = FIELD_GET(NFP_ABM_PORTID_ID, port_id);

	reprs = rcu_dereference(app->reprs[rtype]);
	if (!reprs)
		return NULL;

	if (port >= reprs->num_reprs)
		return NULL;

	return rcu_dereference(reprs->reprs[port]);
}

static int
nfp_abm_spawn_repr(struct nfp_app *app, struct nfp_abm_link *alink,
		   enum nfp_port_type ptype)
{
	struct net_device *netdev;
	enum nfp_repr_type rtype;
	struct nfp_reprs *reprs;
	struct nfp_repr *repr;
	struct nfp_port *port;
	unsigned int txqs;
	int err;

	if (ptype == NFP_PORT_PHYS_PORT) {
		rtype = NFP_REPR_TYPE_PHYS_PORT;
		txqs = 1;
	} else {
		rtype = NFP_REPR_TYPE_PF;
		txqs = alink->vnic->max_rx_rings;
	}

	netdev = nfp_repr_alloc_mqs(app, txqs, 1);
	if (!netdev)
		return -ENOMEM;
	repr = netdev_priv(netdev);
	repr->app_priv = alink;

	port = nfp_port_alloc(app, ptype, netdev);
	if (IS_ERR(port)) {
		err = PTR_ERR(port);
		goto err_free_repr;
	}

	if (ptype == NFP_PORT_PHYS_PORT) {
		port->eth_forced = true;
		err = nfp_port_init_phy_port(app->pf, app, port, alink->id);
		if (err)
			goto err_free_port;
	} else {
		port->pf_id = alink->abm->pf_id;
		port->pf_split = app->pf->max_data_vnics > 1;
		port->pf_split_id = alink->id;
		port->vnic = alink->vnic->dp.ctrl_bar;
	}

	SET_NETDEV_DEV(netdev, &alink->vnic->pdev->dev);
	eth_hw_addr_random(netdev);

	err = nfp_repr_init(app, netdev, nfp_abm_portid(rtype, alink->id),
			    port, alink->vnic->dp.netdev);
	if (err)
		goto err_free_port;

	reprs = nfp_reprs_get_locked(app, rtype);
	WARN(nfp_repr_get_locked(app, reprs, alink->id), "duplicate repr");
	rtnl_lock();
	rcu_assign_pointer(reprs->reprs[alink->id], netdev);
	rtnl_unlock();

	nfp_info(app->cpp, "%s Port %d Representor(%s) created\n",
		 ptype == NFP_PORT_PF_PORT ? "PCIe" : "Phys",
		 alink->id, netdev->name);

	return 0;

err_free_port:
	nfp_port_free(port);
err_free_repr:
	nfp_repr_free(netdev);
	return err;
}

static void
nfp_abm_kill_repr(struct nfp_app *app, struct nfp_abm_link *alink,
		  enum nfp_repr_type rtype)
{
	struct net_device *netdev;
	struct nfp_reprs *reprs;

	reprs = nfp_reprs_get_locked(app, rtype);
	netdev = nfp_repr_get_locked(app, reprs, alink->id);
	if (!netdev)
		return;
	rtnl_lock();
	rcu_assign_pointer(reprs->reprs[alink->id], NULL);
	rtnl_unlock();
	synchronize_rcu();
	/* Cast to make sure nfp_repr_clean_and_free() takes a nfp_repr */
	nfp_repr_clean_and_free((struct nfp_repr *)netdev_priv(netdev));
}

static void
nfp_abm_kill_reprs(struct nfp_abm *abm, struct nfp_abm_link *alink)
{
	nfp_abm_kill_repr(abm->app, alink, NFP_REPR_TYPE_PF);
	nfp_abm_kill_repr(abm->app, alink, NFP_REPR_TYPE_PHYS_PORT);
}

static void nfp_abm_kill_reprs_all(struct nfp_abm *abm)
{
	struct nfp_pf *pf = abm->app->pf;
	struct nfp_net *nn;

	list_for_each_entry(nn, &pf->vnics, vnic_list)
		nfp_abm_kill_reprs(abm, (struct nfp_abm_link *)nn->app_priv);
}

static enum devlink_eswitch_mode nfp_abm_eswitch_mode_get(struct nfp_app *app)
{
	struct nfp_abm *abm = app->priv;

	return abm->eswitch_mode;
}

static int nfp_abm_eswitch_set_legacy(struct nfp_abm *abm)
{
	nfp_abm_kill_reprs_all(abm);
	nfp_abm_ctrl_qm_disable(abm);

	abm->eswitch_mode = DEVLINK_ESWITCH_MODE_LEGACY;
	return 0;
}

static void nfp_abm_eswitch_clean_up(struct nfp_abm *abm)
{
	if (abm->eswitch_mode != DEVLINK_ESWITCH_MODE_LEGACY)
		WARN_ON(nfp_abm_eswitch_set_legacy(abm));
}

static int nfp_abm_eswitch_set_switchdev(struct nfp_abm *abm)
{
	struct nfp_app *app = abm->app;
	struct nfp_pf *pf = app->pf;
	struct nfp_net *nn;
	int err;

	if (!abm->red_support)
		return -EOPNOTSUPP;

	err = nfp_abm_ctrl_qm_enable(abm);
	if (err)
		return err;

	list_for_each_entry(nn, &pf->vnics, vnic_list) {
		struct nfp_abm_link *alink = nn->app_priv;

		err = nfp_abm_spawn_repr(app, alink, NFP_PORT_PHYS_PORT);
		if (err)
			goto err_kill_all_reprs;

		err = nfp_abm_spawn_repr(app, alink, NFP_PORT_PF_PORT);
		if (err)
			goto err_kill_all_reprs;
	}

	abm->eswitch_mode = DEVLINK_ESWITCH_MODE_SWITCHDEV;
	return 0;

err_kill_all_reprs:
	nfp_abm_kill_reprs_all(abm);
	nfp_abm_ctrl_qm_disable(abm);
	return err;
}

static int nfp_abm_eswitch_mode_set(struct nfp_app *app, u16 mode)
{
	struct nfp_abm *abm = app->priv;

	if (abm->eswitch_mode == mode)
		return 0;

	switch (mode) {
	case DEVLINK_ESWITCH_MODE_LEGACY:
		return nfp_abm_eswitch_set_legacy(abm);
	case DEVLINK_ESWITCH_MODE_SWITCHDEV:
		return nfp_abm_eswitch_set_switchdev(abm);
	default:
		return -EINVAL;
	}
}

static void
nfp_abm_vnic_set_mac(struct nfp_pf *pf, struct nfp_abm *abm, struct nfp_net *nn,
		     unsigned int id)
{
	struct nfp_eth_table_port *eth_port = &pf->eth_tbl->ports[id];
	u8 mac_addr[ETH_ALEN];
	struct nfp_nsp *nsp;
	char hwinfo[32];
	int err;

	if (id > pf->eth_tbl->count) {
		nfp_warn(pf->cpp, "No entry for persistent MAC address\n");
		eth_hw_addr_random(nn->dp.netdev);
		return;
	}

	snprintf(hwinfo, sizeof(hwinfo), "eth%u.mac.pf%u",
		 eth_port->eth_index, abm->pf_id);

	nsp = nfp_nsp_open(pf->cpp);
	if (IS_ERR(nsp)) {
		nfp_warn(pf->cpp, "Failed to access the NSP for persistent MAC address: %ld\n",
			 PTR_ERR(nsp));
		eth_hw_addr_random(nn->dp.netdev);
		return;
	}

	if (!nfp_nsp_has_hwinfo_lookup(nsp)) {
		nfp_warn(pf->cpp, "NSP doesn't support PF MAC generation\n");
		eth_hw_addr_random(nn->dp.netdev);
		return;
	}

	err = nfp_nsp_hwinfo_lookup(nsp, hwinfo, sizeof(hwinfo));
	nfp_nsp_close(nsp);
	if (err) {
		nfp_warn(pf->cpp, "Reading persistent MAC address failed: %d\n",
			 err);
		eth_hw_addr_random(nn->dp.netdev);
		return;
	}

	if (sscanf(hwinfo, "%02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx",
		   &mac_addr[0], &mac_addr[1], &mac_addr[2],
		   &mac_addr[3], &mac_addr[4], &mac_addr[5]) != 6) {
		nfp_warn(pf->cpp, "Can't parse persistent MAC address (%s)\n",
			 hwinfo);
		eth_hw_addr_random(nn->dp.netdev);
		return;
	}

	ether_addr_copy(nn->dp.netdev->dev_addr, mac_addr);
	ether_addr_copy(nn->dp.netdev->perm_addr, mac_addr);
}

static int
nfp_abm_vnic_alloc(struct nfp_app *app, struct nfp_net *nn, unsigned int id)
{
	struct nfp_eth_table_port *eth_port = &app->pf->eth_tbl->ports[id];
	struct nfp_abm *abm = app->priv;
	struct nfp_abm_link *alink;
	int err;

	alink = kzalloc(sizeof(*alink), GFP_KERNEL);
	if (!alink)
		return -ENOMEM;
	nn->app_priv = alink;
	alink->abm = abm;
	alink->vnic = nn;
	alink->id = id;
	alink->total_queues = alink->vnic->max_rx_rings;

	INIT_LIST_HEAD(&alink->dscp_map);

	err = nfp_abm_ctrl_read_params(alink);
	if (err)
		goto err_free_alink;

	alink->prio_map = kzalloc(abm->prio_map_len, GFP_KERNEL);
	if (!alink->prio_map)
		goto err_free_alink;

	/* This is a multi-host app, make sure MAC/PHY is up, but don't
	 * make the MAC/PHY state follow the state of any of the ports.
	 */
	err = nfp_eth_set_configured(app->cpp, eth_port->index, true);
	if (err < 0)
		goto err_free_priomap;

	netif_keep_dst(nn->dp.netdev);

	nfp_abm_vnic_set_mac(app->pf, abm, nn, id);
	INIT_RADIX_TREE(&alink->qdiscs, GFP_KERNEL);

	return 0;

err_free_priomap:
	kfree(alink->prio_map);
err_free_alink:
	kfree(alink);
	return err;
}

static void nfp_abm_vnic_free(struct nfp_app *app, struct nfp_net *nn)
{
	struct nfp_abm_link *alink = nn->app_priv;

	nfp_abm_kill_reprs(alink->abm, alink);
	WARN(!radix_tree_empty(&alink->qdiscs), "left over qdiscs\n");
	kfree(alink->prio_map);
	kfree(alink);
}

static int nfp_abm_vnic_init(struct nfp_app *app, struct nfp_net *nn)
{
	struct nfp_abm_link *alink = nn->app_priv;

	if (nfp_abm_has_prio(alink->abm))
		return nfp_abm_ctrl_prio_map_update(alink, alink->prio_map);
	return 0;
}

static u64 *
nfp_abm_port_get_stats(struct nfp_app *app, struct nfp_port *port, u64 *data)
{
	struct nfp_repr *repr = netdev_priv(port->netdev);
	struct nfp_abm_link *alink;
	unsigned int i;

	if (port->type != NFP_PORT_PF_PORT)
		return data;
	alink = repr->app_priv;
	for (i = 0; i < alink->vnic->dp.num_r_vecs; i++) {
		*data++ = nfp_abm_ctrl_stat_non_sto(alink, i);
		*data++ = nfp_abm_ctrl_stat_sto(alink, i);
	}
	return data;
}

static int
nfp_abm_port_get_stats_count(struct nfp_app *app, struct nfp_port *port)
{
	struct nfp_repr *repr = netdev_priv(port->netdev);
	struct nfp_abm_link *alink;

	if (port->type != NFP_PORT_PF_PORT)
		return 0;
	alink = repr->app_priv;
	return alink->vnic->dp.num_r_vecs * 2;
}

static u8 *
nfp_abm_port_get_stats_strings(struct nfp_app *app, struct nfp_port *port,
			       u8 *data)
{
	struct nfp_repr *repr = netdev_priv(port->netdev);
	struct nfp_abm_link *alink;
	unsigned int i;

	if (port->type != NFP_PORT_PF_PORT)
		return data;
	alink = repr->app_priv;
	for (i = 0; i < alink->vnic->dp.num_r_vecs; i++) {
		data = nfp_pr_et(data, "q%u_no_wait", i);
		data = nfp_pr_et(data, "q%u_delayed", i);
	}
	return data;
}

static int nfp_abm_fw_init_reset(struct nfp_abm *abm)
{
	unsigned int i;

	if (!abm->red_support)
		return 0;

	for (i = 0; i < abm->num_bands * NFP_NET_MAX_RX_RINGS; i++) {
		__nfp_abm_ctrl_set_q_lvl(abm, i, NFP_ABM_LVL_INFINITY);
		__nfp_abm_ctrl_set_q_act(abm, i, NFP_ABM_ACT_DROP);
	}

	return nfp_abm_ctrl_qm_disable(abm);
}

static int nfp_abm_init(struct nfp_app *app)
{
	struct nfp_pf *pf = app->pf;
	struct nfp_reprs *reprs;
	struct nfp_abm *abm;
	int err;

	if (!pf->eth_tbl) {
		nfp_err(pf->cpp, "ABM NIC requires ETH table\n");
		return -EINVAL;
	}
	if (pf->max_data_vnics != pf->eth_tbl->count) {
		nfp_err(pf->cpp, "ETH entries don't match vNICs (%d vs %d)\n",
			pf->max_data_vnics, pf->eth_tbl->count);
		return -EINVAL;
	}
	if (!pf->mac_stats_bar) {
		nfp_warn(app->cpp, "ABM NIC requires mac_stats symbol\n");
		return -EINVAL;
	}

	abm = kzalloc(sizeof(*abm), GFP_KERNEL);
	if (!abm)
		return -ENOMEM;
	app->priv = abm;
	abm->app = app;

	err = nfp_abm_ctrl_find_addrs(abm);
	if (err)
		goto err_free_abm;

	err = -ENOMEM;
	abm->num_thresholds = array_size(abm->num_bands, NFP_NET_MAX_RX_RINGS);
	abm->threshold_undef = bitmap_zalloc(abm->num_thresholds, GFP_KERNEL);
	if (!abm->threshold_undef)
		goto err_free_abm;

	abm->thresholds = kvcalloc(abm->num_thresholds,
				   sizeof(*abm->thresholds), GFP_KERNEL);
	if (!abm->thresholds)
		goto err_free_thresh_umap;

	abm->actions = kvcalloc(abm->num_thresholds, sizeof(*abm->actions),
				GFP_KERNEL);
	if (!abm->actions)
		goto err_free_thresh;

	/* We start in legacy mode, make sure advanced queuing is disabled */
	err = nfp_abm_fw_init_reset(abm);
	if (err)
		goto err_free_act;

	err = -ENOMEM;
	reprs = nfp_reprs_alloc(pf->max_data_vnics);
	if (!reprs)
		goto err_free_act;
	RCU_INIT_POINTER(app->reprs[NFP_REPR_TYPE_PHYS_PORT], reprs);

	reprs = nfp_reprs_alloc(pf->max_data_vnics);
	if (!reprs)
		goto err_free_phys;
	RCU_INIT_POINTER(app->reprs[NFP_REPR_TYPE_PF], reprs);

	return 0;

err_free_phys:
	nfp_reprs_clean_and_free_by_type(app, NFP_REPR_TYPE_PHYS_PORT);
err_free_act:
	kvfree(abm->actions);
err_free_thresh:
	kvfree(abm->thresholds);
err_free_thresh_umap:
	bitmap_free(abm->threshold_undef);
err_free_abm:
	kfree(abm);
	app->priv = NULL;
	return err;
}

static void nfp_abm_clean(struct nfp_app *app)
{
	struct nfp_abm *abm = app->priv;

	nfp_abm_eswitch_clean_up(abm);
	nfp_reprs_clean_and_free_by_type(app, NFP_REPR_TYPE_PF);
	nfp_reprs_clean_and_free_by_type(app, NFP_REPR_TYPE_PHYS_PORT);
	bitmap_free(abm->threshold_undef);
	kvfree(abm->actions);
	kvfree(abm->thresholds);
	kfree(abm);
	app->priv = NULL;
}

const struct nfp_app_type app_abm = {
	.id		= NFP_APP_ACTIVE_BUFFER_MGMT_NIC,
	.name		= "abm",

	.init		= nfp_abm_init,
	.clean		= nfp_abm_clean,

	.vnic_alloc	= nfp_abm_vnic_alloc,
	.vnic_free	= nfp_abm_vnic_free,
	.vnic_init	= nfp_abm_vnic_init,

	.port_get_stats		= nfp_abm_port_get_stats,
	.port_get_stats_count	= nfp_abm_port_get_stats_count,
	.port_get_stats_strings	= nfp_abm_port_get_stats_strings,

	.setup_tc	= nfp_abm_setup_tc,

	.eswitch_mode_get	= nfp_abm_eswitch_mode_get,
	.eswitch_mode_set	= nfp_abm_eswitch_mode_set,

	.repr_get	= nfp_abm_repr_get,
};