summaryrefslogtreecommitdiff
path: root/drivers/net/ethernet/broadcom/bnxt/bnxt_vfr.c
blob: f760921389a304214f854a4604f6233e6eafbfe5 (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
/* Broadcom NetXtreme-C/E network driver.
 *
 * Copyright (c) 2016-2017 Broadcom Limited
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation.
 */
#include <linux/pci.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/rtnetlink.h>
#include <linux/jhash.h>
#include <net/pkt_cls.h>

#include "bnxt_hsi.h"
#include "bnxt.h"
#include "bnxt_vfr.h"
#include "bnxt_devlink.h"
#include "bnxt_tc.h"

#ifdef CONFIG_BNXT_SRIOV

#define CFA_HANDLE_INVALID		0xffff
#define VF_IDX_INVALID			0xffff

static int hwrm_cfa_vfr_alloc(struct bnxt *bp, u16 vf_idx,
			      u16 *tx_cfa_action, u16 *rx_cfa_code)
{
	struct hwrm_cfa_vfr_alloc_output *resp = bp->hwrm_cmd_resp_addr;
	struct hwrm_cfa_vfr_alloc_input req = { 0 };
	int rc;

	bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_CFA_VFR_ALLOC, -1, -1);
	req.vf_id = cpu_to_le16(vf_idx);
	sprintf(req.vfr_name, "vfr%d", vf_idx);

	mutex_lock(&bp->hwrm_cmd_lock);
	rc = _hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT);
	if (!rc) {
		*tx_cfa_action = le16_to_cpu(resp->tx_cfa_action);
		*rx_cfa_code = le16_to_cpu(resp->rx_cfa_code);
		netdev_dbg(bp->dev, "tx_cfa_action=0x%x, rx_cfa_code=0x%x",
			   *tx_cfa_action, *rx_cfa_code);
	} else {
		netdev_info(bp->dev, "%s error rc=%d", __func__, rc);
	}

	mutex_unlock(&bp->hwrm_cmd_lock);
	return rc;
}

static int hwrm_cfa_vfr_free(struct bnxt *bp, u16 vf_idx)
{
	struct hwrm_cfa_vfr_free_input req = { 0 };
	int rc;

	bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_CFA_VFR_FREE, -1, -1);
	sprintf(req.vfr_name, "vfr%d", vf_idx);

	rc = hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT);
	if (rc)
		netdev_info(bp->dev, "%s error rc=%d", __func__, rc);
	return rc;
}

static int bnxt_hwrm_vfr_qcfg(struct bnxt *bp, struct bnxt_vf_rep *vf_rep,
			      u16 *max_mtu)
{
	struct hwrm_func_qcfg_output *resp = bp->hwrm_cmd_resp_addr;
	struct hwrm_func_qcfg_input req = {0};
	u16 mtu;
	int rc;

	bnxt_hwrm_cmd_hdr_init(bp, &req, HWRM_FUNC_QCFG, -1, -1);
	req.fid = cpu_to_le16(bp->pf.vf[vf_rep->vf_idx].fw_fid);

	mutex_lock(&bp->hwrm_cmd_lock);

	rc = _hwrm_send_message(bp, &req, sizeof(req), HWRM_CMD_TIMEOUT);
	if (!rc) {
		mtu = le16_to_cpu(resp->max_mtu_configured);
		if (!mtu)
			*max_mtu = BNXT_MAX_MTU;
		else
			*max_mtu = mtu;
	}
	mutex_unlock(&bp->hwrm_cmd_lock);
	return rc;
}

static int bnxt_vf_rep_open(struct net_device *dev)
{
	struct bnxt_vf_rep *vf_rep = netdev_priv(dev);
	struct bnxt *bp = vf_rep->bp;

	/* Enable link and TX only if the parent PF is open. */
	if (netif_running(bp->dev)) {
		netif_carrier_on(dev);
		netif_tx_start_all_queues(dev);
	}
	return 0;
}

static int bnxt_vf_rep_close(struct net_device *dev)
{
	netif_carrier_off(dev);
	netif_tx_disable(dev);

	return 0;
}

static netdev_tx_t bnxt_vf_rep_xmit(struct sk_buff *skb,
				    struct net_device *dev)
{
	struct bnxt_vf_rep *vf_rep = netdev_priv(dev);
	int rc, len = skb->len;

	skb_dst_drop(skb);
	dst_hold((struct dst_entry *)vf_rep->dst);
	skb_dst_set(skb, (struct dst_entry *)vf_rep->dst);
	skb->dev = vf_rep->dst->u.port_info.lower_dev;

	rc = dev_queue_xmit(skb);
	if (!rc) {
		vf_rep->tx_stats.packets++;
		vf_rep->tx_stats.bytes += len;
	}
	return rc;
}

static void
bnxt_vf_rep_get_stats64(struct net_device *dev,
			struct rtnl_link_stats64 *stats)
{
	struct bnxt_vf_rep *vf_rep = netdev_priv(dev);

	stats->rx_packets = vf_rep->rx_stats.packets;
	stats->rx_bytes = vf_rep->rx_stats.bytes;
	stats->tx_packets = vf_rep->tx_stats.packets;
	stats->tx_bytes = vf_rep->tx_stats.bytes;
}

static int bnxt_vf_rep_setup_tc_block_cb(enum tc_setup_type type,
					 void *type_data,
					 void *cb_priv)
{
	struct bnxt_vf_rep *vf_rep = cb_priv;
	struct bnxt *bp = vf_rep->bp;
	int vf_fid = bp->pf.vf[vf_rep->vf_idx].fw_fid;

	if (!bnxt_tc_flower_enabled(vf_rep->bp) ||
	    !tc_cls_can_offload_and_chain0(bp->dev, type_data))
		return -EOPNOTSUPP;

	switch (type) {
	case TC_SETUP_CLSFLOWER:
		return bnxt_tc_setup_flower(bp, vf_fid, type_data);
	default:
		return -EOPNOTSUPP;
	}
}

static int bnxt_vf_rep_setup_tc_block(struct net_device *dev,
				      struct tc_block_offload *f)
{
	struct bnxt_vf_rep *vf_rep = netdev_priv(dev);

	if (f->binder_type != TCF_BLOCK_BINDER_TYPE_CLSACT_INGRESS)
		return -EOPNOTSUPP;

	switch (f->command) {
	case TC_BLOCK_BIND:
		return tcf_block_cb_register(f->block,
					     bnxt_vf_rep_setup_tc_block_cb,
					     vf_rep, vf_rep, f->extack);
	case TC_BLOCK_UNBIND:
		tcf_block_cb_unregister(f->block,
					bnxt_vf_rep_setup_tc_block_cb, vf_rep);
		return 0;
	default:
		return -EOPNOTSUPP;
	}
}

static int bnxt_vf_rep_setup_tc(struct net_device *dev, enum tc_setup_type type,
				void *type_data)
{
	switch (type) {
	case TC_SETUP_BLOCK:
		return bnxt_vf_rep_setup_tc_block(dev, type_data);
	default:
		return -EOPNOTSUPP;
	}
}

struct net_device *bnxt_get_vf_rep(struct bnxt *bp, u16 cfa_code)
{
	u16 vf_idx;

	if (cfa_code && bp->cfa_code_map && BNXT_PF(bp)) {
		vf_idx = bp->cfa_code_map[cfa_code];
		if (vf_idx != VF_IDX_INVALID)
			return bp->vf_reps[vf_idx]->dev;
	}
	return NULL;
}

void bnxt_vf_rep_rx(struct bnxt *bp, struct sk_buff *skb)
{
	struct bnxt_vf_rep *vf_rep = netdev_priv(skb->dev);

	vf_rep->rx_stats.bytes += skb->len;
	vf_rep->rx_stats.packets++;

	netif_receive_skb(skb);
}

static int bnxt_vf_rep_get_phys_port_name(struct net_device *dev, char *buf,
					  size_t len)
{
	struct bnxt_vf_rep *vf_rep = netdev_priv(dev);
	struct pci_dev *pf_pdev = vf_rep->bp->pdev;
	int rc;

	rc = snprintf(buf, len, "pf%dvf%d", PCI_FUNC(pf_pdev->devfn),
		      vf_rep->vf_idx);
	if (rc >= len)
		return -EOPNOTSUPP;
	return 0;
}

static void bnxt_vf_rep_get_drvinfo(struct net_device *dev,
				    struct ethtool_drvinfo *info)
{
	strlcpy(info->driver, DRV_MODULE_NAME, sizeof(info->driver));
	strlcpy(info->version, DRV_MODULE_VERSION, sizeof(info->version));
}

static int bnxt_vf_rep_get_port_parent_id(struct net_device *dev,
					  struct netdev_phys_item_id *ppid)
{
	struct bnxt_vf_rep *vf_rep = netdev_priv(dev);

	/* as only PORT_PARENT_ID is supported currently use common code
	 * between PF and VF-rep for now.
	 */
	return bnxt_get_port_parent_id(vf_rep->bp->dev, ppid);
}

static const struct ethtool_ops bnxt_vf_rep_ethtool_ops = {
	.get_drvinfo		= bnxt_vf_rep_get_drvinfo
};

static const struct net_device_ops bnxt_vf_rep_netdev_ops = {
	.ndo_open		= bnxt_vf_rep_open,
	.ndo_stop		= bnxt_vf_rep_close,
	.ndo_start_xmit		= bnxt_vf_rep_xmit,
	.ndo_get_stats64	= bnxt_vf_rep_get_stats64,
	.ndo_setup_tc		= bnxt_vf_rep_setup_tc,
	.ndo_get_port_parent_id	= bnxt_vf_rep_get_port_parent_id,
	.ndo_get_phys_port_name = bnxt_vf_rep_get_phys_port_name
};

bool bnxt_dev_is_vf_rep(struct net_device *dev)
{
	return dev->netdev_ops == &bnxt_vf_rep_netdev_ops;
}

/* Called when the parent PF interface is closed:
 * As the mode transition from SWITCHDEV to LEGACY
 * happens under the rtnl_lock() this routine is safe
 * under the rtnl_lock()
 */
void bnxt_vf_reps_close(struct bnxt *bp)
{
	struct bnxt_vf_rep *vf_rep;
	u16 num_vfs, i;

	if (bp->eswitch_mode != DEVLINK_ESWITCH_MODE_SWITCHDEV)
		return;

	num_vfs = pci_num_vf(bp->pdev);
	for (i = 0; i < num_vfs; i++) {
		vf_rep = bp->vf_reps[i];
		if (netif_running(vf_rep->dev))
			bnxt_vf_rep_close(vf_rep->dev);
	}
}

/* Called when the parent PF interface is opened (re-opened):
 * As the mode transition from SWITCHDEV to LEGACY
 * happen under the rtnl_lock() this routine is safe
 * under the rtnl_lock()
 */
void bnxt_vf_reps_open(struct bnxt *bp)
{
	int i;

	if (bp->eswitch_mode != DEVLINK_ESWITCH_MODE_SWITCHDEV)
		return;

	for (i = 0; i < pci_num_vf(bp->pdev); i++)
		bnxt_vf_rep_open(bp->vf_reps[i]->dev);
}

static void __bnxt_vf_reps_destroy(struct bnxt *bp)
{
	u16 num_vfs = pci_num_vf(bp->pdev);
	struct bnxt_vf_rep *vf_rep;
	int i;

	for (i = 0; i < num_vfs; i++) {
		vf_rep = bp->vf_reps[i];
		if (vf_rep) {
			dst_release((struct dst_entry *)vf_rep->dst);

			if (vf_rep->tx_cfa_action != CFA_HANDLE_INVALID)
				hwrm_cfa_vfr_free(bp, vf_rep->vf_idx);

			if (vf_rep->dev) {
				/* if register_netdev failed, then netdev_ops
				 * would have been set to NULL
				 */
				if (vf_rep->dev->netdev_ops)
					unregister_netdev(vf_rep->dev);
				free_netdev(vf_rep->dev);
			}
		}
	}

	kfree(bp->vf_reps);
	bp->vf_reps = NULL;
}

void bnxt_vf_reps_destroy(struct bnxt *bp)
{
	bool closed = false;

	if (bp->eswitch_mode != DEVLINK_ESWITCH_MODE_SWITCHDEV)
		return;

	if (!bp->vf_reps)
		return;

	/* Ensure that parent PF's and VF-reps' RX/TX has been quiesced
	 * before proceeding with VF-rep cleanup.
	 */
	rtnl_lock();
	if (netif_running(bp->dev)) {
		bnxt_close_nic(bp, false, false);
		closed = true;
	}
	/* un-publish cfa_code_map so that RX path can't see it anymore */
	kfree(bp->cfa_code_map);
	bp->cfa_code_map = NULL;
	bp->eswitch_mode = DEVLINK_ESWITCH_MODE_LEGACY;

	if (closed)
		bnxt_open_nic(bp, false, false);
	rtnl_unlock();

	/* Need to call vf_reps_destroy() outside of rntl_lock
	 * as unregister_netdev takes rtnl_lock
	 */
	__bnxt_vf_reps_destroy(bp);
}

/* Use the OUI of the PF's perm addr and report the same mac addr
 * for the same VF-rep each time
 */
static void bnxt_vf_rep_eth_addr_gen(u8 *src_mac, u16 vf_idx, u8 *mac)
{
	u32 addr;

	ether_addr_copy(mac, src_mac);

	addr = jhash(src_mac, ETH_ALEN, 0) + vf_idx;
	mac[3] = (u8)(addr & 0xFF);
	mac[4] = (u8)((addr >> 8) & 0xFF);
	mac[5] = (u8)((addr >> 16) & 0xFF);
}

static void bnxt_vf_rep_netdev_init(struct bnxt *bp, struct bnxt_vf_rep *vf_rep,
				    struct net_device *dev)
{
	struct net_device *pf_dev = bp->dev;
	u16 max_mtu;

	dev->netdev_ops = &bnxt_vf_rep_netdev_ops;
	dev->ethtool_ops = &bnxt_vf_rep_ethtool_ops;
	/* Just inherit all the featues of the parent PF as the VF-R
	 * uses the RX/TX rings of the parent PF
	 */
	dev->hw_features = pf_dev->hw_features;
	dev->gso_partial_features = pf_dev->gso_partial_features;
	dev->vlan_features = pf_dev->vlan_features;
	dev->hw_enc_features = pf_dev->hw_enc_features;
	dev->features |= pf_dev->features;
	bnxt_vf_rep_eth_addr_gen(bp->pf.mac_addr, vf_rep->vf_idx,
				 dev->perm_addr);
	ether_addr_copy(dev->dev_addr, dev->perm_addr);
	/* Set VF-Rep's max-mtu to the corresponding VF's max-mtu */
	if (!bnxt_hwrm_vfr_qcfg(bp, vf_rep, &max_mtu))
		dev->max_mtu = max_mtu;
	dev->min_mtu = ETH_ZLEN;
}

static int bnxt_vf_reps_create(struct bnxt *bp)
{
	u16 *cfa_code_map = NULL, num_vfs = pci_num_vf(bp->pdev);
	struct bnxt_vf_rep *vf_rep;
	struct net_device *dev;
	int rc, i;

	bp->vf_reps = kcalloc(num_vfs, sizeof(vf_rep), GFP_KERNEL);
	if (!bp->vf_reps)
		return -ENOMEM;

	/* storage for cfa_code to vf-idx mapping */
	cfa_code_map = kmalloc_array(MAX_CFA_CODE, sizeof(*bp->cfa_code_map),
				     GFP_KERNEL);
	if (!cfa_code_map) {
		rc = -ENOMEM;
		goto err;
	}
	for (i = 0; i < MAX_CFA_CODE; i++)
		cfa_code_map[i] = VF_IDX_INVALID;

	for (i = 0; i < num_vfs; i++) {
		dev = alloc_etherdev(sizeof(*vf_rep));
		if (!dev) {
			rc = -ENOMEM;
			goto err;
		}

		vf_rep = netdev_priv(dev);
		bp->vf_reps[i] = vf_rep;
		vf_rep->dev = dev;
		vf_rep->bp = bp;
		vf_rep->vf_idx = i;
		vf_rep->tx_cfa_action = CFA_HANDLE_INVALID;

		/* get cfa handles from FW */
		rc = hwrm_cfa_vfr_alloc(bp, vf_rep->vf_idx,
					&vf_rep->tx_cfa_action,
					&vf_rep->rx_cfa_code);
		if (rc) {
			rc = -ENOLINK;
			goto err;
		}
		cfa_code_map[vf_rep->rx_cfa_code] = vf_rep->vf_idx;

		vf_rep->dst = metadata_dst_alloc(0, METADATA_HW_PORT_MUX,
						 GFP_KERNEL);
		if (!vf_rep->dst) {
			rc = -ENOMEM;
			goto err;
		}
		/* only cfa_action is needed to mux a packet while TXing */
		vf_rep->dst->u.port_info.port_id = vf_rep->tx_cfa_action;
		vf_rep->dst->u.port_info.lower_dev = bp->dev;

		bnxt_vf_rep_netdev_init(bp, vf_rep, dev);
		rc = register_netdev(dev);
		if (rc) {
			/* no need for unregister_netdev in cleanup */
			dev->netdev_ops = NULL;
			goto err;
		}
	}

	/* publish cfa_code_map only after all VF-reps have been initialized */
	bp->cfa_code_map = cfa_code_map;
	bp->eswitch_mode = DEVLINK_ESWITCH_MODE_SWITCHDEV;
	netif_keep_dst(bp->dev);
	return 0;

err:
	netdev_info(bp->dev, "%s error=%d", __func__, rc);
	kfree(cfa_code_map);
	__bnxt_vf_reps_destroy(bp);
	return rc;
}

/* Devlink related routines */
int bnxt_dl_eswitch_mode_get(struct devlink *devlink, u16 *mode)
{
	struct bnxt *bp = bnxt_get_bp_from_dl(devlink);

	*mode = bp->eswitch_mode;
	return 0;
}

int bnxt_dl_eswitch_mode_set(struct devlink *devlink, u16 mode,
			     struct netlink_ext_ack *extack)
{
	struct bnxt *bp = bnxt_get_bp_from_dl(devlink);
	int rc = 0;

	mutex_lock(&bp->sriov_lock);
	if (bp->eswitch_mode == mode) {
		netdev_info(bp->dev, "already in %s eswitch mode",
			    mode == DEVLINK_ESWITCH_MODE_LEGACY ?
			    "legacy" : "switchdev");
		rc = -EINVAL;
		goto done;
	}

	switch (mode) {
	case DEVLINK_ESWITCH_MODE_LEGACY:
		bnxt_vf_reps_destroy(bp);
		break;

	case DEVLINK_ESWITCH_MODE_SWITCHDEV:
		if (bp->hwrm_spec_code < 0x10803) {
			netdev_warn(bp->dev, "FW does not support SRIOV E-Switch SWITCHDEV mode\n");
			rc = -ENOTSUPP;
			goto done;
		}

		if (pci_num_vf(bp->pdev) == 0) {
			netdev_info(bp->dev, "Enable VFs before setting switchdev mode");
			rc = -EPERM;
			goto done;
		}
		rc = bnxt_vf_reps_create(bp);
		break;

	default:
		rc = -EINVAL;
		goto done;
	}
done:
	mutex_unlock(&bp->sriov_lock);
	return rc;
}

#endif