1 /**********************************************************************
2  * Author: Cavium, Inc.
3  *
4  * Contact: support@cavium.com
5  *          Please include "LiquidIO" in the subject.
6  *
7  * Copyright (c) 2003-2017 Cavium, Inc.
8  *
9  * This file is free software; you can redistribute it and/or modify
10  * it under the terms of the GNU General Public License, Version 2, as
11  * published by the Free Software Foundation.
12  *
13  * This file is distributed in the hope that it will be useful, but
14  * AS-IS and WITHOUT ANY WARRANTY; without even the implied warranty
15  * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, TITLE, or
16  * NONINFRINGEMENT.  See the GNU General Public License for more details.
17  ***********************************************************************/
18 #include <linux/pci.h>
19 #include <linux/if_vlan.h>
20 #include "liquidio_common.h"
21 #include "octeon_droq.h"
22 #include "octeon_iq.h"
23 #include "response_manager.h"
24 #include "octeon_device.h"
25 #include "octeon_nic.h"
26 #include "octeon_main.h"
27 #include "octeon_network.h"
28 #include "lio_vf_rep.h"
29 
30 static int lio_vf_rep_open(struct net_device *ndev);
31 static int lio_vf_rep_stop(struct net_device *ndev);
32 static netdev_tx_t lio_vf_rep_pkt_xmit(struct sk_buff *skb,
33 				       struct net_device *ndev);
34 static void lio_vf_rep_tx_timeout(struct net_device *netdev, unsigned int txqueue);
35 static int lio_vf_rep_phys_port_name(struct net_device *dev,
36 				     char *buf, size_t len);
37 static void lio_vf_rep_get_stats64(struct net_device *dev,
38 				   struct rtnl_link_stats64 *stats64);
39 static int lio_vf_rep_change_mtu(struct net_device *ndev, int new_mtu);
40 static int lio_vf_get_port_parent_id(struct net_device *dev,
41 				     struct netdev_phys_item_id *ppid);
42 
43 static const struct net_device_ops lio_vf_rep_ndev_ops = {
44 	.ndo_open = lio_vf_rep_open,
45 	.ndo_stop = lio_vf_rep_stop,
46 	.ndo_start_xmit = lio_vf_rep_pkt_xmit,
47 	.ndo_tx_timeout = lio_vf_rep_tx_timeout,
48 	.ndo_get_phys_port_name = lio_vf_rep_phys_port_name,
49 	.ndo_get_stats64 = lio_vf_rep_get_stats64,
50 	.ndo_change_mtu = lio_vf_rep_change_mtu,
51 	.ndo_get_port_parent_id = lio_vf_get_port_parent_id,
52 };
53 
54 static int
55 lio_vf_rep_send_soft_command(struct octeon_device *oct,
56 			     void *req, int req_size,
57 			     void *resp, int resp_size)
58 {
59 	int tot_resp_size = sizeof(struct lio_vf_rep_resp) + resp_size;
60 	struct octeon_soft_command *sc = NULL;
61 	struct lio_vf_rep_resp *rep_resp;
62 	void *sc_req;
63 	int err;
64 
65 	sc = (struct octeon_soft_command *)
66 		octeon_alloc_soft_command(oct, req_size,
67 					  tot_resp_size, 0);
68 	if (!sc)
69 		return -ENOMEM;
70 
71 	init_completion(&sc->complete);
72 	sc->sc_status = OCTEON_REQUEST_PENDING;
73 
74 	sc_req = (struct lio_vf_rep_req *)sc->virtdptr;
75 	memcpy(sc_req, req, req_size);
76 
77 	rep_resp = (struct lio_vf_rep_resp *)sc->virtrptr;
78 	memset(rep_resp, 0, tot_resp_size);
79 	WRITE_ONCE(rep_resp->status, 1);
80 
81 	sc->iq_no = 0;
82 	octeon_prepare_soft_command(oct, sc, OPCODE_NIC,
83 				    OPCODE_NIC_VF_REP_CMD, 0, 0, 0);
84 
85 	err = octeon_send_soft_command(oct, sc);
86 	if (err == IQ_SEND_FAILED)
87 		goto free_buff;
88 
89 	err = wait_for_sc_completion_timeout(oct, sc, 0);
90 	if (err)
91 		return err;
92 
93 	err = READ_ONCE(rep_resp->status) ? -EBUSY : 0;
94 	if (err)
95 		dev_err(&oct->pci_dev->dev, "VF rep send config failed\n");
96 	else if (resp)
97 		memcpy(resp, (rep_resp + 1), resp_size);
98 
99 	WRITE_ONCE(sc->caller_is_done, true);
100 	return err;
101 
102 free_buff:
103 	octeon_free_soft_command(oct, sc);
104 
105 	return err;
106 }
107 
108 static int
109 lio_vf_rep_open(struct net_device *ndev)
110 {
111 	struct lio_vf_rep_desc *vf_rep = netdev_priv(ndev);
112 	struct lio_vf_rep_req rep_cfg;
113 	struct octeon_device *oct;
114 	int ret;
115 
116 	oct = vf_rep->oct;
117 
118 	memset(&rep_cfg, 0, sizeof(rep_cfg));
119 	rep_cfg.req_type = LIO_VF_REP_REQ_STATE;
120 	rep_cfg.ifidx = vf_rep->ifidx;
121 	rep_cfg.rep_state.state = LIO_VF_REP_STATE_UP;
122 
123 	ret = lio_vf_rep_send_soft_command(oct, &rep_cfg,
124 					   sizeof(rep_cfg), NULL, 0);
125 
126 	if (ret) {
127 		dev_err(&oct->pci_dev->dev,
128 			"VF_REP open failed with err %d\n", ret);
129 		return -EIO;
130 	}
131 
132 	atomic_set(&vf_rep->ifstate, (atomic_read(&vf_rep->ifstate) |
133 				      LIO_IFSTATE_RUNNING));
134 
135 	netif_carrier_on(ndev);
136 	netif_start_queue(ndev);
137 
138 	return 0;
139 }
140 
141 static int
142 lio_vf_rep_stop(struct net_device *ndev)
143 {
144 	struct lio_vf_rep_desc *vf_rep = netdev_priv(ndev);
145 	struct lio_vf_rep_req rep_cfg;
146 	struct octeon_device *oct;
147 	int ret;
148 
149 	oct = vf_rep->oct;
150 
151 	memset(&rep_cfg, 0, sizeof(rep_cfg));
152 	rep_cfg.req_type = LIO_VF_REP_REQ_STATE;
153 	rep_cfg.ifidx = vf_rep->ifidx;
154 	rep_cfg.rep_state.state = LIO_VF_REP_STATE_DOWN;
155 
156 	ret = lio_vf_rep_send_soft_command(oct, &rep_cfg,
157 					   sizeof(rep_cfg), NULL, 0);
158 
159 	if (ret) {
160 		dev_err(&oct->pci_dev->dev,
161 			"VF_REP dev stop failed with err %d\n", ret);
162 		return -EIO;
163 	}
164 
165 	atomic_set(&vf_rep->ifstate, (atomic_read(&vf_rep->ifstate) &
166 				      ~LIO_IFSTATE_RUNNING));
167 
168 	netif_tx_disable(ndev);
169 	netif_carrier_off(ndev);
170 
171 	return 0;
172 }
173 
174 static void
175 lio_vf_rep_tx_timeout(struct net_device *ndev, unsigned int txqueue)
176 {
177 	netif_trans_update(ndev);
178 
179 	netif_wake_queue(ndev);
180 }
181 
182 static void
183 lio_vf_rep_get_stats64(struct net_device *dev,
184 		       struct rtnl_link_stats64 *stats64)
185 {
186 	struct lio_vf_rep_desc *vf_rep = netdev_priv(dev);
187 
188 	/* Swap tx and rx stats as VF rep is a switch port */
189 	stats64->tx_packets = vf_rep->stats.rx_packets;
190 	stats64->tx_bytes   = vf_rep->stats.rx_bytes;
191 	stats64->tx_dropped = vf_rep->stats.rx_dropped;
192 
193 	stats64->rx_packets = vf_rep->stats.tx_packets;
194 	stats64->rx_bytes   = vf_rep->stats.tx_bytes;
195 	stats64->rx_dropped = vf_rep->stats.tx_dropped;
196 }
197 
198 static int
199 lio_vf_rep_change_mtu(struct net_device *ndev, int new_mtu)
200 {
201 	struct lio_vf_rep_desc *vf_rep = netdev_priv(ndev);
202 	struct lio_vf_rep_req rep_cfg;
203 	struct octeon_device *oct;
204 	int ret;
205 
206 	oct = vf_rep->oct;
207 
208 	memset(&rep_cfg, 0, sizeof(rep_cfg));
209 	rep_cfg.req_type = LIO_VF_REP_REQ_MTU;
210 	rep_cfg.ifidx = vf_rep->ifidx;
211 	rep_cfg.rep_mtu.mtu = cpu_to_be32(new_mtu);
212 
213 	ret = lio_vf_rep_send_soft_command(oct, &rep_cfg,
214 					   sizeof(rep_cfg), NULL, 0);
215 	if (ret) {
216 		dev_err(&oct->pci_dev->dev,
217 			"Change MTU failed with err %d\n", ret);
218 		return -EIO;
219 	}
220 
221 	ndev->mtu = new_mtu;
222 
223 	return 0;
224 }
225 
226 static int
227 lio_vf_rep_phys_port_name(struct net_device *dev,
228 			  char *buf, size_t len)
229 {
230 	struct lio_vf_rep_desc *vf_rep = netdev_priv(dev);
231 	struct octeon_device *oct = vf_rep->oct;
232 	int ret;
233 
234 	ret = snprintf(buf, len, "pf%dvf%d", oct->pf_num,
235 		       vf_rep->ifidx - oct->pf_num * 64 - 1);
236 	if (ret >= len)
237 		return -EOPNOTSUPP;
238 
239 	return 0;
240 }
241 
242 static struct net_device *
243 lio_vf_rep_get_ndev(struct octeon_device *oct, int ifidx)
244 {
245 	int vf_id, max_vfs = CN23XX_MAX_VFS_PER_PF + 1;
246 	int vfid_mask = max_vfs - 1;
247 
248 	if (ifidx <= oct->pf_num * max_vfs ||
249 	    ifidx >= oct->pf_num * max_vfs + max_vfs)
250 		return NULL;
251 
252 	/* ifidx 1-63 for PF0 VFs
253 	 * ifidx 65-127 for PF1 VFs
254 	 */
255 	vf_id = (ifidx & vfid_mask) - 1;
256 
257 	return oct->vf_rep_list.ndev[vf_id];
258 }
259 
260 static void
261 lio_vf_rep_copy_packet(struct octeon_device *oct,
262 		       struct sk_buff *skb,
263 		       int len)
264 {
265 	if (likely(len > MIN_SKB_SIZE)) {
266 		struct octeon_skb_page_info *pg_info;
267 		unsigned char *va;
268 
269 		pg_info = ((struct octeon_skb_page_info *)(skb->cb));
270 		if (pg_info->page) {
271 			va = page_address(pg_info->page) +
272 				pg_info->page_offset;
273 			memcpy(skb->data, va, MIN_SKB_SIZE);
274 			skb_put(skb, MIN_SKB_SIZE);
275 		}
276 
277 		skb_add_rx_frag(skb, skb_shinfo(skb)->nr_frags,
278 				pg_info->page,
279 				pg_info->page_offset + MIN_SKB_SIZE,
280 				len - MIN_SKB_SIZE,
281 				LIO_RXBUFFER_SZ);
282 	} else {
283 		struct octeon_skb_page_info *pg_info =
284 			((struct octeon_skb_page_info *)(skb->cb));
285 
286 		skb_copy_to_linear_data(skb, page_address(pg_info->page) +
287 					pg_info->page_offset, len);
288 		skb_put(skb, len);
289 		put_page(pg_info->page);
290 	}
291 }
292 
293 static int
294 lio_vf_rep_pkt_recv(struct octeon_recv_info *recv_info, void *buf)
295 {
296 	struct octeon_recv_pkt *recv_pkt = recv_info->recv_pkt;
297 	struct lio_vf_rep_desc *vf_rep;
298 	struct net_device *vf_ndev;
299 	struct octeon_device *oct;
300 	union octeon_rh *rh;
301 	struct sk_buff *skb;
302 	int i, ifidx;
303 
304 	oct = lio_get_device(recv_pkt->octeon_id);
305 	if (!oct)
306 		goto free_buffers;
307 
308 	skb = recv_pkt->buffer_ptr[0];
309 	rh = &recv_pkt->rh;
310 	ifidx = rh->r.ossp;
311 
312 	vf_ndev = lio_vf_rep_get_ndev(oct, ifidx);
313 	if (!vf_ndev)
314 		goto free_buffers;
315 
316 	vf_rep = netdev_priv(vf_ndev);
317 	if (!(atomic_read(&vf_rep->ifstate) & LIO_IFSTATE_RUNNING) ||
318 	    recv_pkt->buffer_count > 1)
319 		goto free_buffers;
320 
321 	skb->dev = vf_ndev;
322 
323 	/* Multiple buffers are not used for vf_rep packets.
324 	 * So just buffer_size[0] is valid.
325 	 */
326 	lio_vf_rep_copy_packet(oct, skb, recv_pkt->buffer_size[0]);
327 
328 	skb_pull(skb, rh->r_dh.len * BYTES_PER_DHLEN_UNIT);
329 	skb->protocol = eth_type_trans(skb, skb->dev);
330 	skb->ip_summed = CHECKSUM_NONE;
331 
332 	netif_rx(skb);
333 
334 	octeon_free_recv_info(recv_info);
335 
336 	return 0;
337 
338 free_buffers:
339 	for (i = 0; i < recv_pkt->buffer_count; i++)
340 		recv_buffer_free(recv_pkt->buffer_ptr[i]);
341 
342 	octeon_free_recv_info(recv_info);
343 
344 	return 0;
345 }
346 
347 static void
348 lio_vf_rep_packet_sent_callback(struct octeon_device *oct,
349 				u32 status, void *buf)
350 {
351 	struct octeon_soft_command *sc = (struct octeon_soft_command *)buf;
352 	struct sk_buff *skb = sc->ctxptr;
353 	struct net_device *ndev = skb->dev;
354 	u32 iq_no;
355 
356 	dma_unmap_single(&oct->pci_dev->dev, sc->dmadptr,
357 			 sc->datasize, DMA_TO_DEVICE);
358 	dev_kfree_skb_any(skb);
359 	iq_no = sc->iq_no;
360 	octeon_free_soft_command(oct, sc);
361 
362 	if (octnet_iq_is_full(oct, iq_no))
363 		return;
364 
365 	if (netif_queue_stopped(ndev))
366 		netif_wake_queue(ndev);
367 }
368 
369 static netdev_tx_t
370 lio_vf_rep_pkt_xmit(struct sk_buff *skb, struct net_device *ndev)
371 {
372 	struct lio_vf_rep_desc *vf_rep = netdev_priv(ndev);
373 	struct net_device *parent_ndev = vf_rep->parent_ndev;
374 	struct octeon_device *oct = vf_rep->oct;
375 	struct octeon_instr_pki_ih3 *pki_ih3;
376 	struct octeon_soft_command *sc;
377 	struct lio *parent_lio;
378 	int status;
379 
380 	parent_lio = GET_LIO(parent_ndev);
381 
382 	if (!(atomic_read(&vf_rep->ifstate) & LIO_IFSTATE_RUNNING) ||
383 	    skb->len <= 0)
384 		goto xmit_failed;
385 
386 	if (octnet_iq_is_full(vf_rep->oct, parent_lio->txq)) {
387 		dev_err(&oct->pci_dev->dev, "VF rep: Device IQ full\n");
388 		netif_stop_queue(ndev);
389 		return NETDEV_TX_BUSY;
390 	}
391 
392 	sc = (struct octeon_soft_command *)
393 		octeon_alloc_soft_command(oct, 0, 16, 0);
394 	if (!sc) {
395 		dev_err(&oct->pci_dev->dev, "VF rep: Soft command alloc failed\n");
396 		goto xmit_failed;
397 	}
398 
399 	/* Multiple buffers are not used for vf_rep packets. */
400 	if (skb_shinfo(skb)->nr_frags != 0) {
401 		dev_err(&oct->pci_dev->dev, "VF rep: nr_frags != 0. Dropping packet\n");
402 		octeon_free_soft_command(oct, sc);
403 		goto xmit_failed;
404 	}
405 
406 	sc->dmadptr = dma_map_single(&oct->pci_dev->dev,
407 				     skb->data, skb->len, DMA_TO_DEVICE);
408 	if (dma_mapping_error(&oct->pci_dev->dev, sc->dmadptr)) {
409 		dev_err(&oct->pci_dev->dev, "VF rep: DMA mapping failed\n");
410 		octeon_free_soft_command(oct, sc);
411 		goto xmit_failed;
412 	}
413 
414 	sc->virtdptr = skb->data;
415 	sc->datasize = skb->len;
416 	sc->ctxptr = skb;
417 	sc->iq_no = parent_lio->txq;
418 
419 	octeon_prepare_soft_command(oct, sc, OPCODE_NIC, OPCODE_NIC_VF_REP_PKT,
420 				    vf_rep->ifidx, 0, 0);
421 	pki_ih3 = (struct octeon_instr_pki_ih3 *)&sc->cmd.cmd3.pki_ih3;
422 	pki_ih3->tagtype = ORDERED_TAG;
423 
424 	sc->callback = lio_vf_rep_packet_sent_callback;
425 	sc->callback_arg = sc;
426 
427 	status = octeon_send_soft_command(oct, sc);
428 	if (status == IQ_SEND_FAILED) {
429 		dma_unmap_single(&oct->pci_dev->dev, sc->dmadptr,
430 				 sc->datasize, DMA_TO_DEVICE);
431 		octeon_free_soft_command(oct, sc);
432 		goto xmit_failed;
433 	}
434 
435 	if (status == IQ_SEND_STOP)
436 		netif_stop_queue(ndev);
437 
438 	netif_trans_update(ndev);
439 
440 	return NETDEV_TX_OK;
441 
442 xmit_failed:
443 	dev_kfree_skb_any(skb);
444 
445 	return NETDEV_TX_OK;
446 }
447 
448 static int lio_vf_get_port_parent_id(struct net_device *dev,
449 				     struct netdev_phys_item_id *ppid)
450 {
451 	struct lio_vf_rep_desc *vf_rep = netdev_priv(dev);
452 	struct net_device *parent_ndev = vf_rep->parent_ndev;
453 	struct lio *lio = GET_LIO(parent_ndev);
454 
455 	ppid->id_len = ETH_ALEN;
456 	ether_addr_copy(ppid->id, (void *)&lio->linfo.hw_addr + 2);
457 
458 	return 0;
459 }
460 
461 static void
462 lio_vf_rep_fetch_stats(struct work_struct *work)
463 {
464 	struct cavium_wk *wk = (struct cavium_wk *)work;
465 	struct lio_vf_rep_desc *vf_rep = wk->ctxptr;
466 	struct lio_vf_rep_stats stats;
467 	struct lio_vf_rep_req rep_cfg;
468 	struct octeon_device *oct;
469 	int ret;
470 
471 	oct = vf_rep->oct;
472 
473 	memset(&rep_cfg, 0, sizeof(rep_cfg));
474 	rep_cfg.req_type = LIO_VF_REP_REQ_STATS;
475 	rep_cfg.ifidx = vf_rep->ifidx;
476 
477 	ret = lio_vf_rep_send_soft_command(oct, &rep_cfg, sizeof(rep_cfg),
478 					   &stats, sizeof(stats));
479 
480 	if (!ret) {
481 		octeon_swap_8B_data((u64 *)&stats, (sizeof(stats) >> 3));
482 		memcpy(&vf_rep->stats, &stats, sizeof(stats));
483 	}
484 
485 	schedule_delayed_work(&vf_rep->stats_wk.work,
486 			      msecs_to_jiffies(LIO_VF_REP_STATS_POLL_TIME_MS));
487 }
488 
489 int
490 lio_vf_rep_create(struct octeon_device *oct)
491 {
492 	struct lio_vf_rep_desc *vf_rep;
493 	struct net_device *ndev;
494 	int i, num_vfs;
495 
496 	if (oct->eswitch_mode != DEVLINK_ESWITCH_MODE_SWITCHDEV)
497 		return 0;
498 
499 	if (!oct->sriov_info.sriov_enabled)
500 		return 0;
501 
502 	num_vfs = oct->sriov_info.num_vfs_alloced;
503 
504 	oct->vf_rep_list.num_vfs = 0;
505 	for (i = 0; i < num_vfs; i++) {
506 		ndev = alloc_etherdev(sizeof(struct lio_vf_rep_desc));
507 
508 		if (!ndev) {
509 			dev_err(&oct->pci_dev->dev,
510 				"VF rep device %d creation failed\n", i);
511 			goto cleanup;
512 		}
513 
514 		ndev->min_mtu = LIO_MIN_MTU_SIZE;
515 		ndev->max_mtu = LIO_MAX_MTU_SIZE;
516 		ndev->netdev_ops = &lio_vf_rep_ndev_ops;
517 
518 		vf_rep = netdev_priv(ndev);
519 		memset(vf_rep, 0, sizeof(*vf_rep));
520 
521 		vf_rep->ndev = ndev;
522 		vf_rep->oct = oct;
523 		vf_rep->parent_ndev = oct->props[0].netdev;
524 		vf_rep->ifidx = (oct->pf_num * 64) + i + 1;
525 
526 		eth_hw_addr_random(ndev);
527 
528 		if (register_netdev(ndev)) {
529 			dev_err(&oct->pci_dev->dev, "VF rep nerdev registration failed\n");
530 
531 			free_netdev(ndev);
532 			goto cleanup;
533 		}
534 
535 		netif_carrier_off(ndev);
536 
537 		INIT_DELAYED_WORK(&vf_rep->stats_wk.work,
538 				  lio_vf_rep_fetch_stats);
539 		vf_rep->stats_wk.ctxptr = (void *)vf_rep;
540 		schedule_delayed_work(&vf_rep->stats_wk.work,
541 				      msecs_to_jiffies
542 				      (LIO_VF_REP_STATS_POLL_TIME_MS));
543 		oct->vf_rep_list.num_vfs++;
544 		oct->vf_rep_list.ndev[i] = ndev;
545 	}
546 
547 	if (octeon_register_dispatch_fn(oct, OPCODE_NIC,
548 					OPCODE_NIC_VF_REP_PKT,
549 					lio_vf_rep_pkt_recv, oct)) {
550 		dev_err(&oct->pci_dev->dev, "VF rep Dispatch func registration failed\n");
551 
552 		goto cleanup;
553 	}
554 
555 	return 0;
556 
557 cleanup:
558 	for (i = 0; i < oct->vf_rep_list.num_vfs; i++) {
559 		ndev = oct->vf_rep_list.ndev[i];
560 		oct->vf_rep_list.ndev[i] = NULL;
561 		if (ndev) {
562 			vf_rep = netdev_priv(ndev);
563 			cancel_delayed_work_sync
564 				(&vf_rep->stats_wk.work);
565 			unregister_netdev(ndev);
566 			free_netdev(ndev);
567 		}
568 	}
569 
570 	oct->vf_rep_list.num_vfs = 0;
571 
572 	return -1;
573 }
574 
575 void
576 lio_vf_rep_destroy(struct octeon_device *oct)
577 {
578 	struct lio_vf_rep_desc *vf_rep;
579 	struct net_device *ndev;
580 	int i;
581 
582 	if (oct->eswitch_mode != DEVLINK_ESWITCH_MODE_SWITCHDEV)
583 		return;
584 
585 	if (!oct->sriov_info.sriov_enabled)
586 		return;
587 
588 	for (i = 0; i < oct->vf_rep_list.num_vfs; i++) {
589 		ndev = oct->vf_rep_list.ndev[i];
590 		oct->vf_rep_list.ndev[i] = NULL;
591 		if (ndev) {
592 			vf_rep = netdev_priv(ndev);
593 			cancel_delayed_work_sync
594 				(&vf_rep->stats_wk.work);
595 			netif_tx_disable(ndev);
596 			netif_carrier_off(ndev);
597 
598 			unregister_netdev(ndev);
599 			free_netdev(ndev);
600 		}
601 	}
602 
603 	oct->vf_rep_list.num_vfs = 0;
604 }
605 
606 static int
607 lio_vf_rep_netdev_event(struct notifier_block *nb,
608 			unsigned long event, void *ptr)
609 {
610 	struct net_device *ndev = netdev_notifier_info_to_dev(ptr);
611 	struct lio_vf_rep_desc *vf_rep;
612 	struct lio_vf_rep_req rep_cfg;
613 	struct octeon_device *oct;
614 	int ret;
615 
616 	switch (event) {
617 	case NETDEV_REGISTER:
618 	case NETDEV_CHANGENAME:
619 		break;
620 
621 	default:
622 		return NOTIFY_DONE;
623 	}
624 
625 	if (ndev->netdev_ops != &lio_vf_rep_ndev_ops)
626 		return NOTIFY_DONE;
627 
628 	vf_rep = netdev_priv(ndev);
629 	oct = vf_rep->oct;
630 
631 	if (strlen(ndev->name) > LIO_IF_NAME_SIZE) {
632 		dev_err(&oct->pci_dev->dev,
633 			"Device name change sync failed as the size is > %d\n",
634 			LIO_IF_NAME_SIZE);
635 		return NOTIFY_DONE;
636 	}
637 
638 	memset(&rep_cfg, 0, sizeof(rep_cfg));
639 	rep_cfg.req_type = LIO_VF_REP_REQ_DEVNAME;
640 	rep_cfg.ifidx = vf_rep->ifidx;
641 	strncpy(rep_cfg.rep_name.name, ndev->name, LIO_IF_NAME_SIZE);
642 
643 	ret = lio_vf_rep_send_soft_command(oct, &rep_cfg,
644 					   sizeof(rep_cfg), NULL, 0);
645 	if (ret)
646 		dev_err(&oct->pci_dev->dev,
647 			"vf_rep netdev name change failed with err %d\n", ret);
648 
649 	return NOTIFY_DONE;
650 }
651 
652 static struct notifier_block lio_vf_rep_netdev_notifier = {
653 	.notifier_call = lio_vf_rep_netdev_event,
654 };
655 
656 int
657 lio_vf_rep_modinit(void)
658 {
659 	if (register_netdevice_notifier(&lio_vf_rep_netdev_notifier)) {
660 		pr_err("netdev notifier registration failed\n");
661 		return -EFAULT;
662 	}
663 
664 	return 0;
665 }
666 
667 void
668 lio_vf_rep_modexit(void)
669 {
670 	if (unregister_netdevice_notifier(&lio_vf_rep_netdev_notifier))
671 		pr_err("netdev notifier unregister failed\n");
672 }
673