xref: /openbmc/linux/net/ncsi/ncsi-rsp.c (revision dc6a81c3)
1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3  * Copyright Gavin Shan, IBM Corporation 2016.
4  */
5 
6 #include <linux/module.h>
7 #include <linux/kernel.h>
8 #include <linux/init.h>
9 #include <linux/netdevice.h>
10 #include <linux/etherdevice.h>
11 #include <linux/skbuff.h>
12 
13 #include <net/ncsi.h>
14 #include <net/net_namespace.h>
15 #include <net/sock.h>
16 #include <net/genetlink.h>
17 
18 #include "internal.h"
19 #include "ncsi-pkt.h"
20 #include "ncsi-netlink.h"
21 
22 static int ncsi_validate_rsp_pkt(struct ncsi_request *nr,
23 				 unsigned short payload)
24 {
25 	struct ncsi_rsp_pkt_hdr *h;
26 	u32 checksum;
27 	__be32 *pchecksum;
28 
29 	/* Check NCSI packet header. We don't need validate
30 	 * the packet type, which should have been checked
31 	 * before calling this function.
32 	 */
33 	h = (struct ncsi_rsp_pkt_hdr *)skb_network_header(nr->rsp);
34 
35 	if (h->common.revision != NCSI_PKT_REVISION) {
36 		netdev_dbg(nr->ndp->ndev.dev,
37 			   "NCSI: unsupported header revision\n");
38 		return -EINVAL;
39 	}
40 	if (ntohs(h->common.length) != payload) {
41 		netdev_dbg(nr->ndp->ndev.dev,
42 			   "NCSI: payload length mismatched\n");
43 		return -EINVAL;
44 	}
45 
46 	/* Check on code and reason */
47 	if (ntohs(h->code) != NCSI_PKT_RSP_C_COMPLETED ||
48 	    ntohs(h->reason) != NCSI_PKT_RSP_R_NO_ERROR) {
49 		netdev_dbg(nr->ndp->ndev.dev,
50 			   "NCSI: non zero response/reason code %04xh, %04xh\n",
51 			    ntohs(h->code), ntohs(h->reason));
52 		return -EPERM;
53 	}
54 
55 	/* Validate checksum, which might be zeroes if the
56 	 * sender doesn't support checksum according to NCSI
57 	 * specification.
58 	 */
59 	pchecksum = (__be32 *)((void *)(h + 1) + ALIGN(payload, 4) - 4);
60 	if (ntohl(*pchecksum) == 0)
61 		return 0;
62 
63 	checksum = ncsi_calculate_checksum((unsigned char *)h,
64 					   sizeof(*h) + payload - 4);
65 
66 	if (*pchecksum != htonl(checksum)) {
67 		netdev_dbg(nr->ndp->ndev.dev,
68 			   "NCSI: checksum mismatched; recd: %08x calc: %08x\n",
69 			   *pchecksum, htonl(checksum));
70 		return -EINVAL;
71 	}
72 
73 	return 0;
74 }
75 
76 static int ncsi_rsp_handler_cis(struct ncsi_request *nr)
77 {
78 	struct ncsi_rsp_pkt *rsp;
79 	struct ncsi_dev_priv *ndp = nr->ndp;
80 	struct ncsi_package *np;
81 	struct ncsi_channel *nc;
82 	unsigned char id;
83 
84 	rsp = (struct ncsi_rsp_pkt *)skb_network_header(nr->rsp);
85 	ncsi_find_package_and_channel(ndp, rsp->rsp.common.channel, &np, &nc);
86 	if (!nc) {
87 		if (ndp->flags & NCSI_DEV_PROBED)
88 			return -ENXIO;
89 
90 		id = NCSI_CHANNEL_INDEX(rsp->rsp.common.channel);
91 		nc = ncsi_add_channel(np, id);
92 	}
93 
94 	return nc ? 0 : -ENODEV;
95 }
96 
97 static int ncsi_rsp_handler_sp(struct ncsi_request *nr)
98 {
99 	struct ncsi_rsp_pkt *rsp;
100 	struct ncsi_dev_priv *ndp = nr->ndp;
101 	struct ncsi_package *np;
102 	unsigned char id;
103 
104 	/* Add the package if it's not existing. Otherwise,
105 	 * to change the state of its child channels.
106 	 */
107 	rsp = (struct ncsi_rsp_pkt *)skb_network_header(nr->rsp);
108 	ncsi_find_package_and_channel(ndp, rsp->rsp.common.channel,
109 				      &np, NULL);
110 	if (!np) {
111 		if (ndp->flags & NCSI_DEV_PROBED)
112 			return -ENXIO;
113 
114 		id = NCSI_PACKAGE_INDEX(rsp->rsp.common.channel);
115 		np = ncsi_add_package(ndp, id);
116 		if (!np)
117 			return -ENODEV;
118 	}
119 
120 	return 0;
121 }
122 
123 static int ncsi_rsp_handler_dp(struct ncsi_request *nr)
124 {
125 	struct ncsi_rsp_pkt *rsp;
126 	struct ncsi_dev_priv *ndp = nr->ndp;
127 	struct ncsi_package *np;
128 	struct ncsi_channel *nc;
129 	unsigned long flags;
130 
131 	/* Find the package */
132 	rsp = (struct ncsi_rsp_pkt *)skb_network_header(nr->rsp);
133 	ncsi_find_package_and_channel(ndp, rsp->rsp.common.channel,
134 				      &np, NULL);
135 	if (!np)
136 		return -ENODEV;
137 
138 	/* Change state of all channels attached to the package */
139 	NCSI_FOR_EACH_CHANNEL(np, nc) {
140 		spin_lock_irqsave(&nc->lock, flags);
141 		nc->state = NCSI_CHANNEL_INACTIVE;
142 		spin_unlock_irqrestore(&nc->lock, flags);
143 	}
144 
145 	return 0;
146 }
147 
148 static int ncsi_rsp_handler_ec(struct ncsi_request *nr)
149 {
150 	struct ncsi_rsp_pkt *rsp;
151 	struct ncsi_dev_priv *ndp = nr->ndp;
152 	struct ncsi_channel *nc;
153 	struct ncsi_channel_mode *ncm;
154 
155 	/* Find the package and channel */
156 	rsp = (struct ncsi_rsp_pkt *)skb_network_header(nr->rsp);
157 	ncsi_find_package_and_channel(ndp, rsp->rsp.common.channel,
158 				      NULL, &nc);
159 	if (!nc)
160 		return -ENODEV;
161 
162 	ncm = &nc->modes[NCSI_MODE_ENABLE];
163 	if (ncm->enable)
164 		return 0;
165 
166 	ncm->enable = 1;
167 	return 0;
168 }
169 
170 static int ncsi_rsp_handler_dc(struct ncsi_request *nr)
171 {
172 	struct ncsi_rsp_pkt *rsp;
173 	struct ncsi_dev_priv *ndp = nr->ndp;
174 	struct ncsi_channel *nc;
175 	struct ncsi_channel_mode *ncm;
176 	int ret;
177 
178 	ret = ncsi_validate_rsp_pkt(nr, 4);
179 	if (ret)
180 		return ret;
181 
182 	/* Find the package and channel */
183 	rsp = (struct ncsi_rsp_pkt *)skb_network_header(nr->rsp);
184 	ncsi_find_package_and_channel(ndp, rsp->rsp.common.channel,
185 				      NULL, &nc);
186 	if (!nc)
187 		return -ENODEV;
188 
189 	ncm = &nc->modes[NCSI_MODE_ENABLE];
190 	if (!ncm->enable)
191 		return 0;
192 
193 	ncm->enable = 0;
194 	return 0;
195 }
196 
197 static int ncsi_rsp_handler_rc(struct ncsi_request *nr)
198 {
199 	struct ncsi_rsp_pkt *rsp;
200 	struct ncsi_dev_priv *ndp = nr->ndp;
201 	struct ncsi_channel *nc;
202 	unsigned long flags;
203 
204 	/* Find the package and channel */
205 	rsp = (struct ncsi_rsp_pkt *)skb_network_header(nr->rsp);
206 	ncsi_find_package_and_channel(ndp, rsp->rsp.common.channel,
207 				      NULL, &nc);
208 	if (!nc)
209 		return -ENODEV;
210 
211 	/* Update state for the specified channel */
212 	spin_lock_irqsave(&nc->lock, flags);
213 	nc->state = NCSI_CHANNEL_INACTIVE;
214 	spin_unlock_irqrestore(&nc->lock, flags);
215 
216 	return 0;
217 }
218 
219 static int ncsi_rsp_handler_ecnt(struct ncsi_request *nr)
220 {
221 	struct ncsi_rsp_pkt *rsp;
222 	struct ncsi_dev_priv *ndp = nr->ndp;
223 	struct ncsi_channel *nc;
224 	struct ncsi_channel_mode *ncm;
225 
226 	/* Find the package and channel */
227 	rsp = (struct ncsi_rsp_pkt *)skb_network_header(nr->rsp);
228 	ncsi_find_package_and_channel(ndp, rsp->rsp.common.channel,
229 				      NULL, &nc);
230 	if (!nc)
231 		return -ENODEV;
232 
233 	ncm = &nc->modes[NCSI_MODE_TX_ENABLE];
234 	if (ncm->enable)
235 		return 0;
236 
237 	ncm->enable = 1;
238 	return 0;
239 }
240 
241 static int ncsi_rsp_handler_dcnt(struct ncsi_request *nr)
242 {
243 	struct ncsi_rsp_pkt *rsp;
244 	struct ncsi_dev_priv *ndp = nr->ndp;
245 	struct ncsi_channel *nc;
246 	struct ncsi_channel_mode *ncm;
247 
248 	/* Find the package and channel */
249 	rsp = (struct ncsi_rsp_pkt *)skb_network_header(nr->rsp);
250 	ncsi_find_package_and_channel(ndp, rsp->rsp.common.channel,
251 				      NULL, &nc);
252 	if (!nc)
253 		return -ENODEV;
254 
255 	ncm = &nc->modes[NCSI_MODE_TX_ENABLE];
256 	if (!ncm->enable)
257 		return 0;
258 
259 	ncm->enable = 0;
260 	return 0;
261 }
262 
263 static int ncsi_rsp_handler_ae(struct ncsi_request *nr)
264 {
265 	struct ncsi_cmd_ae_pkt *cmd;
266 	struct ncsi_rsp_pkt *rsp;
267 	struct ncsi_dev_priv *ndp = nr->ndp;
268 	struct ncsi_channel *nc;
269 	struct ncsi_channel_mode *ncm;
270 
271 	/* Find the package and channel */
272 	rsp = (struct ncsi_rsp_pkt *)skb_network_header(nr->rsp);
273 	ncsi_find_package_and_channel(ndp, rsp->rsp.common.channel,
274 				      NULL, &nc);
275 	if (!nc)
276 		return -ENODEV;
277 
278 	/* Check if the AEN has been enabled */
279 	ncm = &nc->modes[NCSI_MODE_AEN];
280 	if (ncm->enable)
281 		return 0;
282 
283 	/* Update to AEN configuration */
284 	cmd = (struct ncsi_cmd_ae_pkt *)skb_network_header(nr->cmd);
285 	ncm->enable = 1;
286 	ncm->data[0] = cmd->mc_id;
287 	ncm->data[1] = ntohl(cmd->mode);
288 
289 	return 0;
290 }
291 
292 static int ncsi_rsp_handler_sl(struct ncsi_request *nr)
293 {
294 	struct ncsi_cmd_sl_pkt *cmd;
295 	struct ncsi_rsp_pkt *rsp;
296 	struct ncsi_dev_priv *ndp = nr->ndp;
297 	struct ncsi_channel *nc;
298 	struct ncsi_channel_mode *ncm;
299 
300 	/* Find the package and channel */
301 	rsp = (struct ncsi_rsp_pkt *)skb_network_header(nr->rsp);
302 	ncsi_find_package_and_channel(ndp, rsp->rsp.common.channel,
303 				      NULL, &nc);
304 	if (!nc)
305 		return -ENODEV;
306 
307 	cmd = (struct ncsi_cmd_sl_pkt *)skb_network_header(nr->cmd);
308 	ncm = &nc->modes[NCSI_MODE_LINK];
309 	ncm->data[0] = ntohl(cmd->mode);
310 	ncm->data[1] = ntohl(cmd->oem_mode);
311 
312 	return 0;
313 }
314 
315 static int ncsi_rsp_handler_gls(struct ncsi_request *nr)
316 {
317 	struct ncsi_rsp_gls_pkt *rsp;
318 	struct ncsi_dev_priv *ndp = nr->ndp;
319 	struct ncsi_channel *nc;
320 	struct ncsi_channel_mode *ncm;
321 	unsigned long flags;
322 
323 	/* Find the package and channel */
324 	rsp = (struct ncsi_rsp_gls_pkt *)skb_network_header(nr->rsp);
325 	ncsi_find_package_and_channel(ndp, rsp->rsp.common.channel,
326 				      NULL, &nc);
327 	if (!nc)
328 		return -ENODEV;
329 
330 	ncm = &nc->modes[NCSI_MODE_LINK];
331 	ncm->data[2] = ntohl(rsp->status);
332 	ncm->data[3] = ntohl(rsp->other);
333 	ncm->data[4] = ntohl(rsp->oem_status);
334 
335 	if (nr->flags & NCSI_REQ_FLAG_EVENT_DRIVEN)
336 		return 0;
337 
338 	/* Reset the channel monitor if it has been enabled */
339 	spin_lock_irqsave(&nc->lock, flags);
340 	nc->monitor.state = NCSI_CHANNEL_MONITOR_START;
341 	spin_unlock_irqrestore(&nc->lock, flags);
342 
343 	return 0;
344 }
345 
346 static int ncsi_rsp_handler_svf(struct ncsi_request *nr)
347 {
348 	struct ncsi_cmd_svf_pkt *cmd;
349 	struct ncsi_rsp_pkt *rsp;
350 	struct ncsi_dev_priv *ndp = nr->ndp;
351 	struct ncsi_channel *nc;
352 	struct ncsi_channel_vlan_filter *ncf;
353 	unsigned long flags;
354 	void *bitmap;
355 
356 	/* Find the package and channel */
357 	rsp = (struct ncsi_rsp_pkt *)skb_network_header(nr->rsp);
358 	ncsi_find_package_and_channel(ndp, rsp->rsp.common.channel,
359 				      NULL, &nc);
360 	if (!nc)
361 		return -ENODEV;
362 
363 	cmd = (struct ncsi_cmd_svf_pkt *)skb_network_header(nr->cmd);
364 	ncf = &nc->vlan_filter;
365 	if (cmd->index == 0 || cmd->index > ncf->n_vids)
366 		return -ERANGE;
367 
368 	/* Add or remove the VLAN filter. Remember HW indexes from 1 */
369 	spin_lock_irqsave(&nc->lock, flags);
370 	bitmap = &ncf->bitmap;
371 	if (!(cmd->enable & 0x1)) {
372 		if (test_and_clear_bit(cmd->index - 1, bitmap))
373 			ncf->vids[cmd->index - 1] = 0;
374 	} else {
375 		set_bit(cmd->index - 1, bitmap);
376 		ncf->vids[cmd->index - 1] = ntohs(cmd->vlan);
377 	}
378 	spin_unlock_irqrestore(&nc->lock, flags);
379 
380 	return 0;
381 }
382 
383 static int ncsi_rsp_handler_ev(struct ncsi_request *nr)
384 {
385 	struct ncsi_cmd_ev_pkt *cmd;
386 	struct ncsi_rsp_pkt *rsp;
387 	struct ncsi_dev_priv *ndp = nr->ndp;
388 	struct ncsi_channel *nc;
389 	struct ncsi_channel_mode *ncm;
390 
391 	/* Find the package and channel */
392 	rsp = (struct ncsi_rsp_pkt *)skb_network_header(nr->rsp);
393 	ncsi_find_package_and_channel(ndp, rsp->rsp.common.channel,
394 				      NULL, &nc);
395 	if (!nc)
396 		return -ENODEV;
397 
398 	/* Check if VLAN mode has been enabled */
399 	ncm = &nc->modes[NCSI_MODE_VLAN];
400 	if (ncm->enable)
401 		return 0;
402 
403 	/* Update to VLAN mode */
404 	cmd = (struct ncsi_cmd_ev_pkt *)skb_network_header(nr->cmd);
405 	ncm->enable = 1;
406 	ncm->data[0] = ntohl(cmd->mode);
407 
408 	return 0;
409 }
410 
411 static int ncsi_rsp_handler_dv(struct ncsi_request *nr)
412 {
413 	struct ncsi_rsp_pkt *rsp;
414 	struct ncsi_dev_priv *ndp = nr->ndp;
415 	struct ncsi_channel *nc;
416 	struct ncsi_channel_mode *ncm;
417 
418 	/* Find the package and channel */
419 	rsp = (struct ncsi_rsp_pkt *)skb_network_header(nr->rsp);
420 	ncsi_find_package_and_channel(ndp, rsp->rsp.common.channel,
421 				      NULL, &nc);
422 	if (!nc)
423 		return -ENODEV;
424 
425 	/* Check if VLAN mode has been enabled */
426 	ncm = &nc->modes[NCSI_MODE_VLAN];
427 	if (!ncm->enable)
428 		return 0;
429 
430 	/* Update to VLAN mode */
431 	ncm->enable = 0;
432 	return 0;
433 }
434 
435 static int ncsi_rsp_handler_sma(struct ncsi_request *nr)
436 {
437 	struct ncsi_cmd_sma_pkt *cmd;
438 	struct ncsi_rsp_pkt *rsp;
439 	struct ncsi_dev_priv *ndp = nr->ndp;
440 	struct ncsi_channel *nc;
441 	struct ncsi_channel_mac_filter *ncf;
442 	unsigned long flags;
443 	void *bitmap;
444 	bool enabled;
445 	int index;
446 
447 
448 	/* Find the package and channel */
449 	rsp = (struct ncsi_rsp_pkt *)skb_network_header(nr->rsp);
450 	ncsi_find_package_and_channel(ndp, rsp->rsp.common.channel,
451 				      NULL, &nc);
452 	if (!nc)
453 		return -ENODEV;
454 
455 	/* According to NCSI spec 1.01, the mixed filter table
456 	 * isn't supported yet.
457 	 */
458 	cmd = (struct ncsi_cmd_sma_pkt *)skb_network_header(nr->cmd);
459 	enabled = cmd->at_e & 0x1;
460 	ncf = &nc->mac_filter;
461 	bitmap = &ncf->bitmap;
462 
463 	if (cmd->index == 0 ||
464 	    cmd->index > ncf->n_uc + ncf->n_mc + ncf->n_mixed)
465 		return -ERANGE;
466 
467 	index = (cmd->index - 1) * ETH_ALEN;
468 	spin_lock_irqsave(&nc->lock, flags);
469 	if (enabled) {
470 		set_bit(cmd->index - 1, bitmap);
471 		memcpy(&ncf->addrs[index], cmd->mac, ETH_ALEN);
472 	} else {
473 		clear_bit(cmd->index - 1, bitmap);
474 		memset(&ncf->addrs[index], 0, ETH_ALEN);
475 	}
476 	spin_unlock_irqrestore(&nc->lock, flags);
477 
478 	return 0;
479 }
480 
481 static int ncsi_rsp_handler_ebf(struct ncsi_request *nr)
482 {
483 	struct ncsi_cmd_ebf_pkt *cmd;
484 	struct ncsi_rsp_pkt *rsp;
485 	struct ncsi_dev_priv *ndp = nr->ndp;
486 	struct ncsi_channel *nc;
487 	struct ncsi_channel_mode *ncm;
488 
489 	/* Find the package and channel */
490 	rsp = (struct ncsi_rsp_pkt *)skb_network_header(nr->rsp);
491 	ncsi_find_package_and_channel(ndp, rsp->rsp.common.channel, NULL, &nc);
492 	if (!nc)
493 		return -ENODEV;
494 
495 	/* Check if broadcast filter has been enabled */
496 	ncm = &nc->modes[NCSI_MODE_BC];
497 	if (ncm->enable)
498 		return 0;
499 
500 	/* Update to broadcast filter mode */
501 	cmd = (struct ncsi_cmd_ebf_pkt *)skb_network_header(nr->cmd);
502 	ncm->enable = 1;
503 	ncm->data[0] = ntohl(cmd->mode);
504 
505 	return 0;
506 }
507 
508 static int ncsi_rsp_handler_dbf(struct ncsi_request *nr)
509 {
510 	struct ncsi_rsp_pkt *rsp;
511 	struct ncsi_dev_priv *ndp = nr->ndp;
512 	struct ncsi_channel *nc;
513 	struct ncsi_channel_mode *ncm;
514 
515 	rsp = (struct ncsi_rsp_pkt *)skb_network_header(nr->rsp);
516 	ncsi_find_package_and_channel(ndp, rsp->rsp.common.channel,
517 				      NULL, &nc);
518 	if (!nc)
519 		return -ENODEV;
520 
521 	/* Check if broadcast filter isn't enabled */
522 	ncm = &nc->modes[NCSI_MODE_BC];
523 	if (!ncm->enable)
524 		return 0;
525 
526 	/* Update to broadcast filter mode */
527 	ncm->enable = 0;
528 	ncm->data[0] = 0;
529 
530 	return 0;
531 }
532 
533 static int ncsi_rsp_handler_egmf(struct ncsi_request *nr)
534 {
535 	struct ncsi_cmd_egmf_pkt *cmd;
536 	struct ncsi_rsp_pkt *rsp;
537 	struct ncsi_dev_priv *ndp = nr->ndp;
538 	struct ncsi_channel *nc;
539 	struct ncsi_channel_mode *ncm;
540 
541 	/* Find the channel */
542 	rsp = (struct ncsi_rsp_pkt *)skb_network_header(nr->rsp);
543 	ncsi_find_package_and_channel(ndp, rsp->rsp.common.channel,
544 				      NULL, &nc);
545 	if (!nc)
546 		return -ENODEV;
547 
548 	/* Check if multicast filter has been enabled */
549 	ncm = &nc->modes[NCSI_MODE_MC];
550 	if (ncm->enable)
551 		return 0;
552 
553 	/* Update to multicast filter mode */
554 	cmd = (struct ncsi_cmd_egmf_pkt *)skb_network_header(nr->cmd);
555 	ncm->enable = 1;
556 	ncm->data[0] = ntohl(cmd->mode);
557 
558 	return 0;
559 }
560 
561 static int ncsi_rsp_handler_dgmf(struct ncsi_request *nr)
562 {
563 	struct ncsi_rsp_pkt *rsp;
564 	struct ncsi_dev_priv *ndp = nr->ndp;
565 	struct ncsi_channel *nc;
566 	struct ncsi_channel_mode *ncm;
567 
568 	rsp = (struct ncsi_rsp_pkt *)skb_network_header(nr->rsp);
569 	ncsi_find_package_and_channel(ndp, rsp->rsp.common.channel,
570 				      NULL, &nc);
571 	if (!nc)
572 		return -ENODEV;
573 
574 	/* Check if multicast filter has been enabled */
575 	ncm = &nc->modes[NCSI_MODE_MC];
576 	if (!ncm->enable)
577 		return 0;
578 
579 	/* Update to multicast filter mode */
580 	ncm->enable = 0;
581 	ncm->data[0] = 0;
582 
583 	return 0;
584 }
585 
586 static int ncsi_rsp_handler_snfc(struct ncsi_request *nr)
587 {
588 	struct ncsi_cmd_snfc_pkt *cmd;
589 	struct ncsi_rsp_pkt *rsp;
590 	struct ncsi_dev_priv *ndp = nr->ndp;
591 	struct ncsi_channel *nc;
592 	struct ncsi_channel_mode *ncm;
593 
594 	/* Find the channel */
595 	rsp = (struct ncsi_rsp_pkt *)skb_network_header(nr->rsp);
596 	ncsi_find_package_and_channel(ndp, rsp->rsp.common.channel,
597 				      NULL, &nc);
598 	if (!nc)
599 		return -ENODEV;
600 
601 	/* Check if flow control has been enabled */
602 	ncm = &nc->modes[NCSI_MODE_FC];
603 	if (ncm->enable)
604 		return 0;
605 
606 	/* Update to flow control mode */
607 	cmd = (struct ncsi_cmd_snfc_pkt *)skb_network_header(nr->cmd);
608 	ncm->enable = 1;
609 	ncm->data[0] = cmd->mode;
610 
611 	return 0;
612 }
613 
614 /* Response handler for Mellanox command Get Mac Address */
615 static int ncsi_rsp_handler_oem_mlx_gma(struct ncsi_request *nr)
616 {
617 	struct ncsi_dev_priv *ndp = nr->ndp;
618 	struct net_device *ndev = ndp->ndev.dev;
619 	const struct net_device_ops *ops = ndev->netdev_ops;
620 	struct ncsi_rsp_oem_pkt *rsp;
621 	struct sockaddr saddr;
622 	int ret = 0;
623 
624 	/* Get the response header */
625 	rsp = (struct ncsi_rsp_oem_pkt *)skb_network_header(nr->rsp);
626 
627 	saddr.sa_family = ndev->type;
628 	ndev->priv_flags |= IFF_LIVE_ADDR_CHANGE;
629 	memcpy(saddr.sa_data, &rsp->data[MLX_MAC_ADDR_OFFSET], ETH_ALEN);
630 	/* Set the flag for GMA command which should only be called once */
631 	ndp->gma_flag = 1;
632 
633 	ret = ops->ndo_set_mac_address(ndev, &saddr);
634 	if (ret < 0)
635 		netdev_warn(ndev, "NCSI: 'Writing mac address to device failed\n");
636 
637 	return ret;
638 }
639 
640 /* Response handler for Mellanox card */
641 static int ncsi_rsp_handler_oem_mlx(struct ncsi_request *nr)
642 {
643 	struct ncsi_rsp_oem_mlx_pkt *mlx;
644 	struct ncsi_rsp_oem_pkt *rsp;
645 
646 	/* Get the response header */
647 	rsp = (struct ncsi_rsp_oem_pkt *)skb_network_header(nr->rsp);
648 	mlx = (struct ncsi_rsp_oem_mlx_pkt *)(rsp->data);
649 
650 	if (mlx->cmd == NCSI_OEM_MLX_CMD_GMA &&
651 	    mlx->param == NCSI_OEM_MLX_CMD_GMA_PARAM)
652 		return ncsi_rsp_handler_oem_mlx_gma(nr);
653 	return 0;
654 }
655 
656 /* Response handler for Broadcom command Get Mac Address */
657 static int ncsi_rsp_handler_oem_bcm_gma(struct ncsi_request *nr)
658 {
659 	struct ncsi_dev_priv *ndp = nr->ndp;
660 	struct net_device *ndev = ndp->ndev.dev;
661 	const struct net_device_ops *ops = ndev->netdev_ops;
662 	struct ncsi_rsp_oem_pkt *rsp;
663 	struct sockaddr saddr;
664 	int ret = 0;
665 
666 	/* Get the response header */
667 	rsp = (struct ncsi_rsp_oem_pkt *)skb_network_header(nr->rsp);
668 
669 	saddr.sa_family = ndev->type;
670 	ndev->priv_flags |= IFF_LIVE_ADDR_CHANGE;
671 	memcpy(saddr.sa_data, &rsp->data[BCM_MAC_ADDR_OFFSET], ETH_ALEN);
672 	/* Increase mac address by 1 for BMC's address */
673 	eth_addr_inc((u8 *)saddr.sa_data);
674 	if (!is_valid_ether_addr((const u8 *)saddr.sa_data))
675 		return -ENXIO;
676 
677 	/* Set the flag for GMA command which should only be called once */
678 	ndp->gma_flag = 1;
679 
680 	ret = ops->ndo_set_mac_address(ndev, &saddr);
681 	if (ret < 0)
682 		netdev_warn(ndev, "NCSI: 'Writing mac address to device failed\n");
683 
684 	return ret;
685 }
686 
687 /* Response handler for Broadcom card */
688 static int ncsi_rsp_handler_oem_bcm(struct ncsi_request *nr)
689 {
690 	struct ncsi_rsp_oem_bcm_pkt *bcm;
691 	struct ncsi_rsp_oem_pkt *rsp;
692 
693 	/* Get the response header */
694 	rsp = (struct ncsi_rsp_oem_pkt *)skb_network_header(nr->rsp);
695 	bcm = (struct ncsi_rsp_oem_bcm_pkt *)(rsp->data);
696 
697 	if (bcm->type == NCSI_OEM_BCM_CMD_GMA)
698 		return ncsi_rsp_handler_oem_bcm_gma(nr);
699 	return 0;
700 }
701 
702 static struct ncsi_rsp_oem_handler {
703 	unsigned int	mfr_id;
704 	int		(*handler)(struct ncsi_request *nr);
705 } ncsi_rsp_oem_handlers[] = {
706 	{ NCSI_OEM_MFR_MLX_ID, ncsi_rsp_handler_oem_mlx },
707 	{ NCSI_OEM_MFR_BCM_ID, ncsi_rsp_handler_oem_bcm }
708 };
709 
710 /* Response handler for OEM command */
711 static int ncsi_rsp_handler_oem(struct ncsi_request *nr)
712 {
713 	struct ncsi_rsp_oem_handler *nrh = NULL;
714 	struct ncsi_rsp_oem_pkt *rsp;
715 	unsigned int mfr_id, i;
716 
717 	/* Get the response header */
718 	rsp = (struct ncsi_rsp_oem_pkt *)skb_network_header(nr->rsp);
719 	mfr_id = ntohl(rsp->mfr_id);
720 
721 	/* Check for manufacturer id and Find the handler */
722 	for (i = 0; i < ARRAY_SIZE(ncsi_rsp_oem_handlers); i++) {
723 		if (ncsi_rsp_oem_handlers[i].mfr_id == mfr_id) {
724 			if (ncsi_rsp_oem_handlers[i].handler)
725 				nrh = &ncsi_rsp_oem_handlers[i];
726 			else
727 				nrh = NULL;
728 
729 			break;
730 		}
731 	}
732 
733 	if (!nrh) {
734 		netdev_err(nr->ndp->ndev.dev, "Received unrecognized OEM packet with MFR-ID (0x%x)\n",
735 			   mfr_id);
736 		return -ENOENT;
737 	}
738 
739 	/* Process the packet */
740 	return nrh->handler(nr);
741 }
742 
743 static int ncsi_rsp_handler_gvi(struct ncsi_request *nr)
744 {
745 	struct ncsi_rsp_gvi_pkt *rsp;
746 	struct ncsi_dev_priv *ndp = nr->ndp;
747 	struct ncsi_channel *nc;
748 	struct ncsi_channel_version *ncv;
749 	int i;
750 
751 	/* Find the channel */
752 	rsp = (struct ncsi_rsp_gvi_pkt *)skb_network_header(nr->rsp);
753 	ncsi_find_package_and_channel(ndp, rsp->rsp.common.channel,
754 				      NULL, &nc);
755 	if (!nc)
756 		return -ENODEV;
757 
758 	/* Update to channel's version info */
759 	ncv = &nc->version;
760 	ncv->version = ntohl(rsp->ncsi_version);
761 	ncv->alpha2 = rsp->alpha2;
762 	memcpy(ncv->fw_name, rsp->fw_name, 12);
763 	ncv->fw_version = ntohl(rsp->fw_version);
764 	for (i = 0; i < ARRAY_SIZE(ncv->pci_ids); i++)
765 		ncv->pci_ids[i] = ntohs(rsp->pci_ids[i]);
766 	ncv->mf_id = ntohl(rsp->mf_id);
767 
768 	return 0;
769 }
770 
771 static int ncsi_rsp_handler_gc(struct ncsi_request *nr)
772 {
773 	struct ncsi_rsp_gc_pkt *rsp;
774 	struct ncsi_dev_priv *ndp = nr->ndp;
775 	struct ncsi_channel *nc;
776 	size_t size;
777 
778 	/* Find the channel */
779 	rsp = (struct ncsi_rsp_gc_pkt *)skb_network_header(nr->rsp);
780 	ncsi_find_package_and_channel(ndp, rsp->rsp.common.channel,
781 				      NULL, &nc);
782 	if (!nc)
783 		return -ENODEV;
784 
785 	/* Update channel's capabilities */
786 	nc->caps[NCSI_CAP_GENERIC].cap = ntohl(rsp->cap) &
787 					 NCSI_CAP_GENERIC_MASK;
788 	nc->caps[NCSI_CAP_BC].cap = ntohl(rsp->bc_cap) &
789 				    NCSI_CAP_BC_MASK;
790 	nc->caps[NCSI_CAP_MC].cap = ntohl(rsp->mc_cap) &
791 				    NCSI_CAP_MC_MASK;
792 	nc->caps[NCSI_CAP_BUFFER].cap = ntohl(rsp->buf_cap);
793 	nc->caps[NCSI_CAP_AEN].cap = ntohl(rsp->aen_cap) &
794 				     NCSI_CAP_AEN_MASK;
795 	nc->caps[NCSI_CAP_VLAN].cap = rsp->vlan_mode &
796 				      NCSI_CAP_VLAN_MASK;
797 
798 	size = (rsp->uc_cnt + rsp->mc_cnt + rsp->mixed_cnt) * ETH_ALEN;
799 	nc->mac_filter.addrs = kzalloc(size, GFP_ATOMIC);
800 	if (!nc->mac_filter.addrs)
801 		return -ENOMEM;
802 	nc->mac_filter.n_uc = rsp->uc_cnt;
803 	nc->mac_filter.n_mc = rsp->mc_cnt;
804 	nc->mac_filter.n_mixed = rsp->mixed_cnt;
805 
806 	nc->vlan_filter.vids = kcalloc(rsp->vlan_cnt,
807 				       sizeof(*nc->vlan_filter.vids),
808 				       GFP_ATOMIC);
809 	if (!nc->vlan_filter.vids)
810 		return -ENOMEM;
811 	/* Set VLAN filters active so they are cleared in the first
812 	 * configuration state
813 	 */
814 	nc->vlan_filter.bitmap = U64_MAX;
815 	nc->vlan_filter.n_vids = rsp->vlan_cnt;
816 
817 	return 0;
818 }
819 
820 static int ncsi_rsp_handler_gp(struct ncsi_request *nr)
821 {
822 	struct ncsi_channel_vlan_filter *ncvf;
823 	struct ncsi_channel_mac_filter *ncmf;
824 	struct ncsi_dev_priv *ndp = nr->ndp;
825 	struct ncsi_rsp_gp_pkt *rsp;
826 	struct ncsi_channel *nc;
827 	unsigned short enable;
828 	unsigned char *pdata;
829 	unsigned long flags;
830 	void *bitmap;
831 	int i;
832 
833 	/* Find the channel */
834 	rsp = (struct ncsi_rsp_gp_pkt *)skb_network_header(nr->rsp);
835 	ncsi_find_package_and_channel(ndp, rsp->rsp.common.channel,
836 				      NULL, &nc);
837 	if (!nc)
838 		return -ENODEV;
839 
840 	/* Modes with explicit enabled indications */
841 	if (ntohl(rsp->valid_modes) & 0x1) {	/* BC filter mode */
842 		nc->modes[NCSI_MODE_BC].enable = 1;
843 		nc->modes[NCSI_MODE_BC].data[0] = ntohl(rsp->bc_mode);
844 	}
845 	if (ntohl(rsp->valid_modes) & 0x2)	/* Channel enabled */
846 		nc->modes[NCSI_MODE_ENABLE].enable = 1;
847 	if (ntohl(rsp->valid_modes) & 0x4)	/* Channel Tx enabled */
848 		nc->modes[NCSI_MODE_TX_ENABLE].enable = 1;
849 	if (ntohl(rsp->valid_modes) & 0x8)	/* MC filter mode */
850 		nc->modes[NCSI_MODE_MC].enable = 1;
851 
852 	/* Modes without explicit enabled indications */
853 	nc->modes[NCSI_MODE_LINK].enable = 1;
854 	nc->modes[NCSI_MODE_LINK].data[0] = ntohl(rsp->link_mode);
855 	nc->modes[NCSI_MODE_VLAN].enable = 1;
856 	nc->modes[NCSI_MODE_VLAN].data[0] = rsp->vlan_mode;
857 	nc->modes[NCSI_MODE_FC].enable = 1;
858 	nc->modes[NCSI_MODE_FC].data[0] = rsp->fc_mode;
859 	nc->modes[NCSI_MODE_AEN].enable = 1;
860 	nc->modes[NCSI_MODE_AEN].data[0] = ntohl(rsp->aen_mode);
861 
862 	/* MAC addresses filter table */
863 	pdata = (unsigned char *)rsp + 48;
864 	enable = rsp->mac_enable;
865 	ncmf = &nc->mac_filter;
866 	spin_lock_irqsave(&nc->lock, flags);
867 	bitmap = &ncmf->bitmap;
868 	for (i = 0; i < rsp->mac_cnt; i++, pdata += 6) {
869 		if (!(enable & (0x1 << i)))
870 			clear_bit(i, bitmap);
871 		else
872 			set_bit(i, bitmap);
873 
874 		memcpy(&ncmf->addrs[i * ETH_ALEN], pdata, ETH_ALEN);
875 	}
876 	spin_unlock_irqrestore(&nc->lock, flags);
877 
878 	/* VLAN filter table */
879 	enable = ntohs(rsp->vlan_enable);
880 	ncvf = &nc->vlan_filter;
881 	bitmap = &ncvf->bitmap;
882 	spin_lock_irqsave(&nc->lock, flags);
883 	for (i = 0; i < rsp->vlan_cnt; i++, pdata += 2) {
884 		if (!(enable & (0x1 << i)))
885 			clear_bit(i, bitmap);
886 		else
887 			set_bit(i, bitmap);
888 
889 		ncvf->vids[i] = ntohs(*(__be16 *)pdata);
890 	}
891 	spin_unlock_irqrestore(&nc->lock, flags);
892 
893 	return 0;
894 }
895 
896 static int ncsi_rsp_handler_gcps(struct ncsi_request *nr)
897 {
898 	struct ncsi_rsp_gcps_pkt *rsp;
899 	struct ncsi_dev_priv *ndp = nr->ndp;
900 	struct ncsi_channel *nc;
901 	struct ncsi_channel_stats *ncs;
902 
903 	/* Find the channel */
904 	rsp = (struct ncsi_rsp_gcps_pkt *)skb_network_header(nr->rsp);
905 	ncsi_find_package_and_channel(ndp, rsp->rsp.common.channel,
906 				      NULL, &nc);
907 	if (!nc)
908 		return -ENODEV;
909 
910 	/* Update HNC's statistics */
911 	ncs = &nc->stats;
912 	ncs->hnc_cnt_hi         = ntohl(rsp->cnt_hi);
913 	ncs->hnc_cnt_lo         = ntohl(rsp->cnt_lo);
914 	ncs->hnc_rx_bytes       = ntohl(rsp->rx_bytes);
915 	ncs->hnc_tx_bytes       = ntohl(rsp->tx_bytes);
916 	ncs->hnc_rx_uc_pkts     = ntohl(rsp->rx_uc_pkts);
917 	ncs->hnc_rx_mc_pkts     = ntohl(rsp->rx_mc_pkts);
918 	ncs->hnc_rx_bc_pkts     = ntohl(rsp->rx_bc_pkts);
919 	ncs->hnc_tx_uc_pkts     = ntohl(rsp->tx_uc_pkts);
920 	ncs->hnc_tx_mc_pkts     = ntohl(rsp->tx_mc_pkts);
921 	ncs->hnc_tx_bc_pkts     = ntohl(rsp->tx_bc_pkts);
922 	ncs->hnc_fcs_err        = ntohl(rsp->fcs_err);
923 	ncs->hnc_align_err      = ntohl(rsp->align_err);
924 	ncs->hnc_false_carrier  = ntohl(rsp->false_carrier);
925 	ncs->hnc_runt_pkts      = ntohl(rsp->runt_pkts);
926 	ncs->hnc_jabber_pkts    = ntohl(rsp->jabber_pkts);
927 	ncs->hnc_rx_pause_xon   = ntohl(rsp->rx_pause_xon);
928 	ncs->hnc_rx_pause_xoff  = ntohl(rsp->rx_pause_xoff);
929 	ncs->hnc_tx_pause_xon   = ntohl(rsp->tx_pause_xon);
930 	ncs->hnc_tx_pause_xoff  = ntohl(rsp->tx_pause_xoff);
931 	ncs->hnc_tx_s_collision = ntohl(rsp->tx_s_collision);
932 	ncs->hnc_tx_m_collision = ntohl(rsp->tx_m_collision);
933 	ncs->hnc_l_collision    = ntohl(rsp->l_collision);
934 	ncs->hnc_e_collision    = ntohl(rsp->e_collision);
935 	ncs->hnc_rx_ctl_frames  = ntohl(rsp->rx_ctl_frames);
936 	ncs->hnc_rx_64_frames   = ntohl(rsp->rx_64_frames);
937 	ncs->hnc_rx_127_frames  = ntohl(rsp->rx_127_frames);
938 	ncs->hnc_rx_255_frames  = ntohl(rsp->rx_255_frames);
939 	ncs->hnc_rx_511_frames  = ntohl(rsp->rx_511_frames);
940 	ncs->hnc_rx_1023_frames = ntohl(rsp->rx_1023_frames);
941 	ncs->hnc_rx_1522_frames = ntohl(rsp->rx_1522_frames);
942 	ncs->hnc_rx_9022_frames = ntohl(rsp->rx_9022_frames);
943 	ncs->hnc_tx_64_frames   = ntohl(rsp->tx_64_frames);
944 	ncs->hnc_tx_127_frames  = ntohl(rsp->tx_127_frames);
945 	ncs->hnc_tx_255_frames  = ntohl(rsp->tx_255_frames);
946 	ncs->hnc_tx_511_frames  = ntohl(rsp->tx_511_frames);
947 	ncs->hnc_tx_1023_frames = ntohl(rsp->tx_1023_frames);
948 	ncs->hnc_tx_1522_frames = ntohl(rsp->tx_1522_frames);
949 	ncs->hnc_tx_9022_frames = ntohl(rsp->tx_9022_frames);
950 	ncs->hnc_rx_valid_bytes = ntohl(rsp->rx_valid_bytes);
951 	ncs->hnc_rx_runt_pkts   = ntohl(rsp->rx_runt_pkts);
952 	ncs->hnc_rx_jabber_pkts = ntohl(rsp->rx_jabber_pkts);
953 
954 	return 0;
955 }
956 
957 static int ncsi_rsp_handler_gns(struct ncsi_request *nr)
958 {
959 	struct ncsi_rsp_gns_pkt *rsp;
960 	struct ncsi_dev_priv *ndp = nr->ndp;
961 	struct ncsi_channel *nc;
962 	struct ncsi_channel_stats *ncs;
963 
964 	/* Find the channel */
965 	rsp = (struct ncsi_rsp_gns_pkt *)skb_network_header(nr->rsp);
966 	ncsi_find_package_and_channel(ndp, rsp->rsp.common.channel,
967 				      NULL, &nc);
968 	if (!nc)
969 		return -ENODEV;
970 
971 	/* Update HNC's statistics */
972 	ncs = &nc->stats;
973 	ncs->ncsi_rx_cmds       = ntohl(rsp->rx_cmds);
974 	ncs->ncsi_dropped_cmds  = ntohl(rsp->dropped_cmds);
975 	ncs->ncsi_cmd_type_errs = ntohl(rsp->cmd_type_errs);
976 	ncs->ncsi_cmd_csum_errs = ntohl(rsp->cmd_csum_errs);
977 	ncs->ncsi_rx_pkts       = ntohl(rsp->rx_pkts);
978 	ncs->ncsi_tx_pkts       = ntohl(rsp->tx_pkts);
979 	ncs->ncsi_tx_aen_pkts   = ntohl(rsp->tx_aen_pkts);
980 
981 	return 0;
982 }
983 
984 static int ncsi_rsp_handler_gnpts(struct ncsi_request *nr)
985 {
986 	struct ncsi_rsp_gnpts_pkt *rsp;
987 	struct ncsi_dev_priv *ndp = nr->ndp;
988 	struct ncsi_channel *nc;
989 	struct ncsi_channel_stats *ncs;
990 
991 	/* Find the channel */
992 	rsp = (struct ncsi_rsp_gnpts_pkt *)skb_network_header(nr->rsp);
993 	ncsi_find_package_and_channel(ndp, rsp->rsp.common.channel,
994 				      NULL, &nc);
995 	if (!nc)
996 		return -ENODEV;
997 
998 	/* Update HNC's statistics */
999 	ncs = &nc->stats;
1000 	ncs->pt_tx_pkts        = ntohl(rsp->tx_pkts);
1001 	ncs->pt_tx_dropped     = ntohl(rsp->tx_dropped);
1002 	ncs->pt_tx_channel_err = ntohl(rsp->tx_channel_err);
1003 	ncs->pt_tx_us_err      = ntohl(rsp->tx_us_err);
1004 	ncs->pt_rx_pkts        = ntohl(rsp->rx_pkts);
1005 	ncs->pt_rx_dropped     = ntohl(rsp->rx_dropped);
1006 	ncs->pt_rx_channel_err = ntohl(rsp->rx_channel_err);
1007 	ncs->pt_rx_us_err      = ntohl(rsp->rx_us_err);
1008 	ncs->pt_rx_os_err      = ntohl(rsp->rx_os_err);
1009 
1010 	return 0;
1011 }
1012 
1013 static int ncsi_rsp_handler_gps(struct ncsi_request *nr)
1014 {
1015 	struct ncsi_rsp_gps_pkt *rsp;
1016 	struct ncsi_dev_priv *ndp = nr->ndp;
1017 	struct ncsi_package *np;
1018 
1019 	/* Find the package */
1020 	rsp = (struct ncsi_rsp_gps_pkt *)skb_network_header(nr->rsp);
1021 	ncsi_find_package_and_channel(ndp, rsp->rsp.common.channel,
1022 				      &np, NULL);
1023 	if (!np)
1024 		return -ENODEV;
1025 
1026 	return 0;
1027 }
1028 
1029 static int ncsi_rsp_handler_gpuuid(struct ncsi_request *nr)
1030 {
1031 	struct ncsi_rsp_gpuuid_pkt *rsp;
1032 	struct ncsi_dev_priv *ndp = nr->ndp;
1033 	struct ncsi_package *np;
1034 
1035 	/* Find the package */
1036 	rsp = (struct ncsi_rsp_gpuuid_pkt *)skb_network_header(nr->rsp);
1037 	ncsi_find_package_and_channel(ndp, rsp->rsp.common.channel,
1038 				      &np, NULL);
1039 	if (!np)
1040 		return -ENODEV;
1041 
1042 	memcpy(np->uuid, rsp->uuid, sizeof(rsp->uuid));
1043 
1044 	return 0;
1045 }
1046 
1047 static int ncsi_rsp_handler_pldm(struct ncsi_request *nr)
1048 {
1049 	return 0;
1050 }
1051 
1052 static int ncsi_rsp_handler_netlink(struct ncsi_request *nr)
1053 {
1054 	struct ncsi_dev_priv *ndp = nr->ndp;
1055 	struct ncsi_rsp_pkt *rsp;
1056 	struct ncsi_package *np;
1057 	struct ncsi_channel *nc;
1058 	int ret;
1059 
1060 	/* Find the package */
1061 	rsp = (struct ncsi_rsp_pkt *)skb_network_header(nr->rsp);
1062 	ncsi_find_package_and_channel(ndp, rsp->rsp.common.channel,
1063 				      &np, &nc);
1064 	if (!np)
1065 		return -ENODEV;
1066 
1067 	ret = ncsi_send_netlink_rsp(nr, np, nc);
1068 
1069 	return ret;
1070 }
1071 
1072 static struct ncsi_rsp_handler {
1073 	unsigned char	type;
1074 	int             payload;
1075 	int		(*handler)(struct ncsi_request *nr);
1076 } ncsi_rsp_handlers[] = {
1077 	{ NCSI_PKT_RSP_CIS,     4, ncsi_rsp_handler_cis     },
1078 	{ NCSI_PKT_RSP_SP,      4, ncsi_rsp_handler_sp      },
1079 	{ NCSI_PKT_RSP_DP,      4, ncsi_rsp_handler_dp      },
1080 	{ NCSI_PKT_RSP_EC,      4, ncsi_rsp_handler_ec      },
1081 	{ NCSI_PKT_RSP_DC,      4, ncsi_rsp_handler_dc      },
1082 	{ NCSI_PKT_RSP_RC,      4, ncsi_rsp_handler_rc      },
1083 	{ NCSI_PKT_RSP_ECNT,    4, ncsi_rsp_handler_ecnt    },
1084 	{ NCSI_PKT_RSP_DCNT,    4, ncsi_rsp_handler_dcnt    },
1085 	{ NCSI_PKT_RSP_AE,      4, ncsi_rsp_handler_ae      },
1086 	{ NCSI_PKT_RSP_SL,      4, ncsi_rsp_handler_sl      },
1087 	{ NCSI_PKT_RSP_GLS,    16, ncsi_rsp_handler_gls     },
1088 	{ NCSI_PKT_RSP_SVF,     4, ncsi_rsp_handler_svf     },
1089 	{ NCSI_PKT_RSP_EV,      4, ncsi_rsp_handler_ev      },
1090 	{ NCSI_PKT_RSP_DV,      4, ncsi_rsp_handler_dv      },
1091 	{ NCSI_PKT_RSP_SMA,     4, ncsi_rsp_handler_sma     },
1092 	{ NCSI_PKT_RSP_EBF,     4, ncsi_rsp_handler_ebf     },
1093 	{ NCSI_PKT_RSP_DBF,     4, ncsi_rsp_handler_dbf     },
1094 	{ NCSI_PKT_RSP_EGMF,    4, ncsi_rsp_handler_egmf    },
1095 	{ NCSI_PKT_RSP_DGMF,    4, ncsi_rsp_handler_dgmf    },
1096 	{ NCSI_PKT_RSP_SNFC,    4, ncsi_rsp_handler_snfc    },
1097 	{ NCSI_PKT_RSP_GVI,    40, ncsi_rsp_handler_gvi     },
1098 	{ NCSI_PKT_RSP_GC,     32, ncsi_rsp_handler_gc      },
1099 	{ NCSI_PKT_RSP_GP,     -1, ncsi_rsp_handler_gp      },
1100 	{ NCSI_PKT_RSP_GCPS,  204, ncsi_rsp_handler_gcps    },
1101 	{ NCSI_PKT_RSP_GNS,    32, ncsi_rsp_handler_gns     },
1102 	{ NCSI_PKT_RSP_GNPTS,  48, ncsi_rsp_handler_gnpts   },
1103 	{ NCSI_PKT_RSP_GPS,     8, ncsi_rsp_handler_gps     },
1104 	{ NCSI_PKT_RSP_OEM,    -1, ncsi_rsp_handler_oem     },
1105 	{ NCSI_PKT_RSP_PLDM,   -1, ncsi_rsp_handler_pldm    },
1106 	{ NCSI_PKT_RSP_GPUUID, 20, ncsi_rsp_handler_gpuuid  },
1107 	{ NCSI_PKT_RSP_QPNPR,  -1, ncsi_rsp_handler_pldm    },
1108 	{ NCSI_PKT_RSP_SNPR,   -1, ncsi_rsp_handler_pldm    }
1109 };
1110 
1111 int ncsi_rcv_rsp(struct sk_buff *skb, struct net_device *dev,
1112 		 struct packet_type *pt, struct net_device *orig_dev)
1113 {
1114 	struct ncsi_rsp_handler *nrh = NULL;
1115 	struct ncsi_dev *nd;
1116 	struct ncsi_dev_priv *ndp;
1117 	struct ncsi_request *nr;
1118 	struct ncsi_pkt_hdr *hdr;
1119 	unsigned long flags;
1120 	int payload, i, ret;
1121 
1122 	/* Find the NCSI device */
1123 	nd = ncsi_find_dev(dev);
1124 	ndp = nd ? TO_NCSI_DEV_PRIV(nd) : NULL;
1125 	if (!ndp)
1126 		return -ENODEV;
1127 
1128 	/* Check if it is AEN packet */
1129 	hdr = (struct ncsi_pkt_hdr *)skb_network_header(skb);
1130 	if (hdr->type == NCSI_PKT_AEN)
1131 		return ncsi_aen_handler(ndp, skb);
1132 
1133 	/* Find the handler */
1134 	for (i = 0; i < ARRAY_SIZE(ncsi_rsp_handlers); i++) {
1135 		if (ncsi_rsp_handlers[i].type == hdr->type) {
1136 			if (ncsi_rsp_handlers[i].handler)
1137 				nrh = &ncsi_rsp_handlers[i];
1138 			else
1139 				nrh = NULL;
1140 
1141 			break;
1142 		}
1143 	}
1144 
1145 	if (!nrh) {
1146 		netdev_err(nd->dev, "Received unrecognized packet (0x%x)\n",
1147 			   hdr->type);
1148 		return -ENOENT;
1149 	}
1150 
1151 	/* Associate with the request */
1152 	spin_lock_irqsave(&ndp->lock, flags);
1153 	nr = &ndp->requests[hdr->id];
1154 	if (!nr->used) {
1155 		spin_unlock_irqrestore(&ndp->lock, flags);
1156 		return -ENODEV;
1157 	}
1158 
1159 	nr->rsp = skb;
1160 	if (!nr->enabled) {
1161 		spin_unlock_irqrestore(&ndp->lock, flags);
1162 		ret = -ENOENT;
1163 		goto out;
1164 	}
1165 
1166 	/* Validate the packet */
1167 	spin_unlock_irqrestore(&ndp->lock, flags);
1168 	payload = nrh->payload;
1169 	if (payload < 0)
1170 		payload = ntohs(hdr->length);
1171 	ret = ncsi_validate_rsp_pkt(nr, payload);
1172 	if (ret) {
1173 		netdev_warn(ndp->ndev.dev,
1174 			    "NCSI: 'bad' packet ignored for type 0x%x\n",
1175 			    hdr->type);
1176 
1177 		if (nr->flags == NCSI_REQ_FLAG_NETLINK_DRIVEN) {
1178 			if (ret == -EPERM)
1179 				goto out_netlink;
1180 			else
1181 				ncsi_send_netlink_err(ndp->ndev.dev,
1182 						      nr->snd_seq,
1183 						      nr->snd_portid,
1184 						      &nr->nlhdr,
1185 						      ret);
1186 		}
1187 		goto out;
1188 	}
1189 
1190 	/* Process the packet */
1191 	ret = nrh->handler(nr);
1192 	if (ret)
1193 		netdev_err(ndp->ndev.dev,
1194 			   "NCSI: Handler for packet type 0x%x returned %d\n",
1195 			   hdr->type, ret);
1196 
1197 out_netlink:
1198 	if (nr->flags == NCSI_REQ_FLAG_NETLINK_DRIVEN) {
1199 		ret = ncsi_rsp_handler_netlink(nr);
1200 		if (ret) {
1201 			netdev_err(ndp->ndev.dev,
1202 				   "NCSI: Netlink handler for packet type 0x%x returned %d\n",
1203 				   hdr->type, ret);
1204 		}
1205 	}
1206 
1207 out:
1208 	ncsi_free_request(nr);
1209 	return ret;
1210 }
1211