xref: /linux/drivers/net/ethernet/aquantia/atlantic/aq_macsec.c (revision cdd5b5a9761fd66d17586e4f4ba6588c70e640ea)
1 // SPDX-License-Identifier: GPL-2.0-only
2 /* Atlantic Network Driver
3  * Copyright (C) 2020 Marvell International Ltd.
4  */
5 
6 #include "aq_macsec.h"
7 #include "aq_nic.h"
8 #include <linux/rtnetlink.h>
9 
10 #include "macsec/macsec_api.h"
11 #define AQ_MACSEC_KEY_LEN_128_BIT 16
12 #define AQ_MACSEC_KEY_LEN_192_BIT 24
13 #define AQ_MACSEC_KEY_LEN_256_BIT 32
14 
15 enum aq_clear_type {
16 	/* update HW configuration */
17 	AQ_CLEAR_HW = BIT(0),
18 	/* update SW configuration (busy bits, pointers) */
19 	AQ_CLEAR_SW = BIT(1),
20 	/* update both HW and SW configuration */
21 	AQ_CLEAR_ALL = AQ_CLEAR_HW | AQ_CLEAR_SW,
22 };
23 
24 static int aq_clear_txsc(struct aq_nic_s *nic, const int txsc_idx,
25 			 enum aq_clear_type clear_type);
26 static int aq_clear_txsa(struct aq_nic_s *nic, struct aq_macsec_txsc *aq_txsc,
27 			 const int sa_num, enum aq_clear_type clear_type);
28 static int aq_clear_rxsc(struct aq_nic_s *nic, const int rxsc_idx,
29 			 enum aq_clear_type clear_type);
30 static int aq_clear_rxsa(struct aq_nic_s *nic, struct aq_macsec_rxsc *aq_rxsc,
31 			 const int sa_num, enum aq_clear_type clear_type);
32 static int aq_clear_secy(struct aq_nic_s *nic, const struct macsec_secy *secy,
33 			 enum aq_clear_type clear_type);
34 static int aq_apply_macsec_cfg(struct aq_nic_s *nic);
35 static int aq_apply_secy_cfg(struct aq_nic_s *nic,
36 			     const struct macsec_secy *secy);
37 
aq_ether_addr_to_mac(u32 mac[2],const unsigned char * emac)38 static void aq_ether_addr_to_mac(u32 mac[2], const unsigned char *emac)
39 {
40 	u32 tmp[2] = { 0 };
41 
42 	memcpy(((u8 *)tmp) + 2, emac, ETH_ALEN);
43 
44 	mac[0] = swab32(tmp[1]);
45 	mac[1] = swab32(tmp[0]);
46 }
47 
48 /* There's a 1:1 mapping between SecY and TX SC */
aq_get_txsc_idx_from_secy(struct aq_macsec_cfg * macsec_cfg,const struct macsec_secy * secy)49 static int aq_get_txsc_idx_from_secy(struct aq_macsec_cfg *macsec_cfg,
50 				     const struct macsec_secy *secy)
51 {
52 	int i;
53 
54 	if (unlikely(!secy))
55 		return -1;
56 
57 	for (i = 0; i < AQ_MACSEC_MAX_SC; i++) {
58 		if (macsec_cfg->aq_txsc[i].sw_secy == secy)
59 			return i;
60 	}
61 	return -1;
62 }
63 
aq_get_rxsc_idx_from_rxsc(struct aq_macsec_cfg * macsec_cfg,const struct macsec_rx_sc * rxsc)64 static int aq_get_rxsc_idx_from_rxsc(struct aq_macsec_cfg *macsec_cfg,
65 				     const struct macsec_rx_sc *rxsc)
66 {
67 	int i;
68 
69 	if (unlikely(!rxsc))
70 		return -1;
71 
72 	for (i = 0; i < AQ_MACSEC_MAX_SC; i++) {
73 		if (macsec_cfg->aq_rxsc[i].sw_rxsc == rxsc)
74 			return i;
75 	}
76 
77 	return -1;
78 }
79 
aq_get_txsc_idx_from_sc_idx(const enum aq_macsec_sc_sa sc_sa,const int sc_idx)80 static int aq_get_txsc_idx_from_sc_idx(const enum aq_macsec_sc_sa sc_sa,
81 				       const int sc_idx)
82 {
83 	switch (sc_sa) {
84 	case aq_macsec_sa_sc_4sa_8sc:
85 		return sc_idx >> 2;
86 	case aq_macsec_sa_sc_2sa_16sc:
87 		return sc_idx >> 1;
88 	case aq_macsec_sa_sc_1sa_32sc:
89 		return sc_idx;
90 	default:
91 		WARN_ONCE(true, "Invalid sc_sa");
92 	}
93 	return -1;
94 }
95 
96 /* Rotate keys u32[8] */
aq_rotate_keys(u32 (* key)[8],const int key_len)97 static void aq_rotate_keys(u32 (*key)[8], const int key_len)
98 {
99 	u32 tmp[8] = { 0 };
100 
101 	memcpy(&tmp, key, sizeof(tmp));
102 	memset(*key, 0, sizeof(*key));
103 
104 	if (key_len == AQ_MACSEC_KEY_LEN_128_BIT) {
105 		(*key)[0] = swab32(tmp[3]);
106 		(*key)[1] = swab32(tmp[2]);
107 		(*key)[2] = swab32(tmp[1]);
108 		(*key)[3] = swab32(tmp[0]);
109 	} else if (key_len == AQ_MACSEC_KEY_LEN_192_BIT) {
110 		(*key)[0] = swab32(tmp[5]);
111 		(*key)[1] = swab32(tmp[4]);
112 		(*key)[2] = swab32(tmp[3]);
113 		(*key)[3] = swab32(tmp[2]);
114 		(*key)[4] = swab32(tmp[1]);
115 		(*key)[5] = swab32(tmp[0]);
116 	} else if (key_len == AQ_MACSEC_KEY_LEN_256_BIT) {
117 		(*key)[0] = swab32(tmp[7]);
118 		(*key)[1] = swab32(tmp[6]);
119 		(*key)[2] = swab32(tmp[5]);
120 		(*key)[3] = swab32(tmp[4]);
121 		(*key)[4] = swab32(tmp[3]);
122 		(*key)[5] = swab32(tmp[2]);
123 		(*key)[6] = swab32(tmp[1]);
124 		(*key)[7] = swab32(tmp[0]);
125 	} else {
126 		pr_warn("Rotate_keys: invalid key_len\n");
127 	}
128 }
129 
130 #define STATS_2x32_TO_64(stat_field)                                           \
131 	(((u64)stat_field[1] << 32) | stat_field[0])
132 
aq_get_macsec_common_stats(struct aq_hw_s * hw,struct aq_macsec_common_stats * stats)133 static int aq_get_macsec_common_stats(struct aq_hw_s *hw,
134 				      struct aq_macsec_common_stats *stats)
135 {
136 	struct aq_mss_ingress_common_counters ingress_counters;
137 	struct aq_mss_egress_common_counters egress_counters;
138 	int ret;
139 
140 	/* MACSEC counters */
141 	ret = aq_mss_get_ingress_common_counters(hw, &ingress_counters);
142 	if (unlikely(ret))
143 		return ret;
144 
145 	stats->in.ctl_pkts = STATS_2x32_TO_64(ingress_counters.ctl_pkts);
146 	stats->in.tagged_miss_pkts =
147 		STATS_2x32_TO_64(ingress_counters.tagged_miss_pkts);
148 	stats->in.untagged_miss_pkts =
149 		STATS_2x32_TO_64(ingress_counters.untagged_miss_pkts);
150 	stats->in.notag_pkts = STATS_2x32_TO_64(ingress_counters.notag_pkts);
151 	stats->in.untagged_pkts =
152 		STATS_2x32_TO_64(ingress_counters.untagged_pkts);
153 	stats->in.bad_tag_pkts =
154 		STATS_2x32_TO_64(ingress_counters.bad_tag_pkts);
155 	stats->in.no_sci_pkts = STATS_2x32_TO_64(ingress_counters.no_sci_pkts);
156 	stats->in.unknown_sci_pkts =
157 		STATS_2x32_TO_64(ingress_counters.unknown_sci_pkts);
158 	stats->in.ctrl_prt_pass_pkts =
159 		STATS_2x32_TO_64(ingress_counters.ctrl_prt_pass_pkts);
160 	stats->in.unctrl_prt_pass_pkts =
161 		STATS_2x32_TO_64(ingress_counters.unctrl_prt_pass_pkts);
162 	stats->in.ctrl_prt_fail_pkts =
163 		STATS_2x32_TO_64(ingress_counters.ctrl_prt_fail_pkts);
164 	stats->in.unctrl_prt_fail_pkts =
165 		STATS_2x32_TO_64(ingress_counters.unctrl_prt_fail_pkts);
166 	stats->in.too_long_pkts =
167 		STATS_2x32_TO_64(ingress_counters.too_long_pkts);
168 	stats->in.igpoc_ctl_pkts =
169 		STATS_2x32_TO_64(ingress_counters.igpoc_ctl_pkts);
170 	stats->in.ecc_error_pkts =
171 		STATS_2x32_TO_64(ingress_counters.ecc_error_pkts);
172 	stats->in.unctrl_hit_drop_redir =
173 		STATS_2x32_TO_64(ingress_counters.unctrl_hit_drop_redir);
174 
175 	ret = aq_mss_get_egress_common_counters(hw, &egress_counters);
176 	if (unlikely(ret))
177 		return ret;
178 	stats->out.ctl_pkts = STATS_2x32_TO_64(egress_counters.ctl_pkt);
179 	stats->out.unknown_sa_pkts =
180 		STATS_2x32_TO_64(egress_counters.unknown_sa_pkts);
181 	stats->out.untagged_pkts =
182 		STATS_2x32_TO_64(egress_counters.untagged_pkts);
183 	stats->out.too_long = STATS_2x32_TO_64(egress_counters.too_long);
184 	stats->out.ecc_error_pkts =
185 		STATS_2x32_TO_64(egress_counters.ecc_error_pkts);
186 	stats->out.unctrl_hit_drop_redir =
187 		STATS_2x32_TO_64(egress_counters.unctrl_hit_drop_redir);
188 
189 	return 0;
190 }
191 
aq_get_rxsa_stats(struct aq_hw_s * hw,const int sa_idx,struct aq_macsec_rx_sa_stats * stats)192 static int aq_get_rxsa_stats(struct aq_hw_s *hw, const int sa_idx,
193 			     struct aq_macsec_rx_sa_stats *stats)
194 {
195 	struct aq_mss_ingress_sa_counters i_sa_counters;
196 	int ret;
197 
198 	ret = aq_mss_get_ingress_sa_counters(hw, &i_sa_counters, sa_idx);
199 	if (unlikely(ret))
200 		return ret;
201 
202 	stats->untagged_hit_pkts =
203 		STATS_2x32_TO_64(i_sa_counters.untagged_hit_pkts);
204 	stats->ctrl_hit_drop_redir_pkts =
205 		STATS_2x32_TO_64(i_sa_counters.ctrl_hit_drop_redir_pkts);
206 	stats->not_using_sa = STATS_2x32_TO_64(i_sa_counters.not_using_sa);
207 	stats->unused_sa = STATS_2x32_TO_64(i_sa_counters.unused_sa);
208 	stats->not_valid_pkts = STATS_2x32_TO_64(i_sa_counters.not_valid_pkts);
209 	stats->invalid_pkts = STATS_2x32_TO_64(i_sa_counters.invalid_pkts);
210 	stats->ok_pkts = STATS_2x32_TO_64(i_sa_counters.ok_pkts);
211 	stats->late_pkts = STATS_2x32_TO_64(i_sa_counters.late_pkts);
212 	stats->delayed_pkts = STATS_2x32_TO_64(i_sa_counters.delayed_pkts);
213 	stats->unchecked_pkts = STATS_2x32_TO_64(i_sa_counters.unchecked_pkts);
214 	stats->validated_octets =
215 		STATS_2x32_TO_64(i_sa_counters.validated_octets);
216 	stats->decrypted_octets =
217 		STATS_2x32_TO_64(i_sa_counters.decrypted_octets);
218 
219 	return 0;
220 }
221 
aq_get_txsa_stats(struct aq_hw_s * hw,const int sa_idx,struct aq_macsec_tx_sa_stats * stats)222 static int aq_get_txsa_stats(struct aq_hw_s *hw, const int sa_idx,
223 			     struct aq_macsec_tx_sa_stats *stats)
224 {
225 	struct aq_mss_egress_sa_counters e_sa_counters;
226 	int ret;
227 
228 	ret = aq_mss_get_egress_sa_counters(hw, &e_sa_counters, sa_idx);
229 	if (unlikely(ret))
230 		return ret;
231 
232 	stats->sa_hit_drop_redirect =
233 		STATS_2x32_TO_64(e_sa_counters.sa_hit_drop_redirect);
234 	stats->sa_protected2_pkts =
235 		STATS_2x32_TO_64(e_sa_counters.sa_protected2_pkts);
236 	stats->sa_protected_pkts =
237 		STATS_2x32_TO_64(e_sa_counters.sa_protected_pkts);
238 	stats->sa_encrypted_pkts =
239 		STATS_2x32_TO_64(e_sa_counters.sa_encrypted_pkts);
240 
241 	return 0;
242 }
243 
aq_get_txsa_next_pn(struct aq_hw_s * hw,const int sa_idx,u32 * pn)244 static int aq_get_txsa_next_pn(struct aq_hw_s *hw, const int sa_idx, u32 *pn)
245 {
246 	struct aq_mss_egress_sa_record sa_rec;
247 	int ret;
248 
249 	ret = aq_mss_get_egress_sa_record(hw, &sa_rec, sa_idx);
250 	if (likely(!ret))
251 		*pn = sa_rec.next_pn;
252 
253 	return ret;
254 }
255 
aq_get_rxsa_next_pn(struct aq_hw_s * hw,const int sa_idx,u32 * pn)256 static int aq_get_rxsa_next_pn(struct aq_hw_s *hw, const int sa_idx, u32 *pn)
257 {
258 	struct aq_mss_ingress_sa_record sa_rec;
259 	int ret;
260 
261 	ret = aq_mss_get_ingress_sa_record(hw, &sa_rec, sa_idx);
262 	if (likely(!ret))
263 		*pn = (!sa_rec.sat_nextpn) ? sa_rec.next_pn : 0;
264 
265 	return ret;
266 }
267 
aq_get_txsc_stats(struct aq_hw_s * hw,const int sc_idx,struct aq_macsec_tx_sc_stats * stats)268 static int aq_get_txsc_stats(struct aq_hw_s *hw, const int sc_idx,
269 			     struct aq_macsec_tx_sc_stats *stats)
270 {
271 	struct aq_mss_egress_sc_counters e_sc_counters;
272 	int ret;
273 
274 	ret = aq_mss_get_egress_sc_counters(hw, &e_sc_counters, sc_idx);
275 	if (unlikely(ret))
276 		return ret;
277 
278 	stats->sc_protected_pkts =
279 		STATS_2x32_TO_64(e_sc_counters.sc_protected_pkts);
280 	stats->sc_encrypted_pkts =
281 		STATS_2x32_TO_64(e_sc_counters.sc_encrypted_pkts);
282 	stats->sc_protected_octets =
283 		STATS_2x32_TO_64(e_sc_counters.sc_protected_octets);
284 	stats->sc_encrypted_octets =
285 		STATS_2x32_TO_64(e_sc_counters.sc_encrypted_octets);
286 
287 	return 0;
288 }
289 
aq_mdo_dev_open(struct macsec_context * ctx)290 static int aq_mdo_dev_open(struct macsec_context *ctx)
291 {
292 	struct aq_nic_s *nic = macsec_netdev_priv(ctx->netdev);
293 	int ret = 0;
294 
295 	if (netif_carrier_ok(nic->ndev))
296 		ret = aq_apply_secy_cfg(nic, ctx->secy);
297 
298 	return ret;
299 }
300 
aq_mdo_dev_stop(struct macsec_context * ctx)301 static int aq_mdo_dev_stop(struct macsec_context *ctx)
302 {
303 	struct aq_nic_s *nic = macsec_netdev_priv(ctx->netdev);
304 	int i;
305 
306 	for (i = 0; i < AQ_MACSEC_MAX_SC; i++) {
307 		if (nic->macsec_cfg->txsc_idx_busy & BIT(i))
308 			aq_clear_secy(nic, nic->macsec_cfg->aq_txsc[i].sw_secy,
309 				      AQ_CLEAR_HW);
310 	}
311 
312 	return 0;
313 }
314 
aq_set_txsc(struct aq_nic_s * nic,const int txsc_idx)315 static int aq_set_txsc(struct aq_nic_s *nic, const int txsc_idx)
316 {
317 	struct aq_macsec_txsc *aq_txsc = &nic->macsec_cfg->aq_txsc[txsc_idx];
318 	struct aq_mss_egress_class_record tx_class_rec = { 0 };
319 	const struct macsec_secy *secy = aq_txsc->sw_secy;
320 	struct aq_mss_egress_sc_record sc_rec = { 0 };
321 	unsigned int sc_idx = aq_txsc->hw_sc_idx;
322 	struct aq_hw_s *hw = nic->aq_hw;
323 	int ret = 0;
324 
325 	aq_ether_addr_to_mac(tx_class_rec.mac_sa, secy->netdev->dev_addr);
326 
327 	put_unaligned_be64((__force u64)secy->sci, tx_class_rec.sci);
328 	tx_class_rec.sci_mask = 0;
329 
330 	tx_class_rec.sa_mask = 0x3f;
331 
332 	tx_class_rec.action = 0; /* forward to SA/SC table */
333 	tx_class_rec.valid = 1;
334 
335 	tx_class_rec.sc_idx = sc_idx;
336 
337 	tx_class_rec.sc_sa = nic->macsec_cfg->sc_sa;
338 
339 	ret = aq_mss_set_egress_class_record(hw, &tx_class_rec, txsc_idx);
340 	if (ret)
341 		return ret;
342 
343 	sc_rec.protect = secy->protect_frames;
344 	if (secy->tx_sc.encrypt)
345 		sc_rec.tci |= BIT(1);
346 	if (secy->tx_sc.scb)
347 		sc_rec.tci |= BIT(2);
348 	if (secy->tx_sc.send_sci)
349 		sc_rec.tci |= BIT(3);
350 	if (secy->tx_sc.end_station)
351 		sc_rec.tci |= BIT(4);
352 	/* The C bit is clear if and only if the Secure Data is
353 	 * exactly the same as the User Data and the ICV is 16 octets long.
354 	 */
355 	if (!(secy->icv_len == 16 && !secy->tx_sc.encrypt))
356 		sc_rec.tci |= BIT(0);
357 
358 	sc_rec.an_roll = 0;
359 
360 	switch (secy->key_len) {
361 	case AQ_MACSEC_KEY_LEN_128_BIT:
362 		sc_rec.sak_len = 0;
363 		break;
364 	case AQ_MACSEC_KEY_LEN_192_BIT:
365 		sc_rec.sak_len = 1;
366 		break;
367 	case AQ_MACSEC_KEY_LEN_256_BIT:
368 		sc_rec.sak_len = 2;
369 		break;
370 	default:
371 		WARN_ONCE(true, "Invalid sc_sa");
372 		return -EINVAL;
373 	}
374 
375 	sc_rec.curr_an = secy->tx_sc.encoding_sa;
376 	sc_rec.valid = 1;
377 	sc_rec.fresh = 1;
378 
379 	return aq_mss_set_egress_sc_record(hw, &sc_rec, sc_idx);
380 }
381 
aq_sc_idx_max(const enum aq_macsec_sc_sa sc_sa)382 static u32 aq_sc_idx_max(const enum aq_macsec_sc_sa sc_sa)
383 {
384 	u32 result = 0;
385 
386 	switch (sc_sa) {
387 	case aq_macsec_sa_sc_4sa_8sc:
388 		result = 8;
389 		break;
390 	case aq_macsec_sa_sc_2sa_16sc:
391 		result = 16;
392 		break;
393 	case aq_macsec_sa_sc_1sa_32sc:
394 		result = 32;
395 		break;
396 	default:
397 		break;
398 	}
399 
400 	return result;
401 }
402 
aq_to_hw_sc_idx(const u32 sc_idx,const enum aq_macsec_sc_sa sc_sa)403 static u32 aq_to_hw_sc_idx(const u32 sc_idx, const enum aq_macsec_sc_sa sc_sa)
404 {
405 	switch (sc_sa) {
406 	case aq_macsec_sa_sc_4sa_8sc:
407 		return sc_idx << 2;
408 	case aq_macsec_sa_sc_2sa_16sc:
409 		return sc_idx << 1;
410 	case aq_macsec_sa_sc_1sa_32sc:
411 		return sc_idx;
412 	default:
413 		WARN_ONCE(true, "Invalid sc_sa");
414 	}
415 
416 	return sc_idx;
417 }
418 
sc_sa_from_num_an(const int num_an)419 static enum aq_macsec_sc_sa sc_sa_from_num_an(const int num_an)
420 {
421 	enum aq_macsec_sc_sa sc_sa = aq_macsec_sa_sc_not_used;
422 
423 	switch (num_an) {
424 	case 4:
425 		sc_sa = aq_macsec_sa_sc_4sa_8sc;
426 		break;
427 	case 2:
428 		sc_sa = aq_macsec_sa_sc_2sa_16sc;
429 		break;
430 	case 1:
431 		sc_sa = aq_macsec_sa_sc_1sa_32sc;
432 		break;
433 	default:
434 		break;
435 	}
436 
437 	return sc_sa;
438 }
439 
aq_mdo_add_secy(struct macsec_context * ctx)440 static int aq_mdo_add_secy(struct macsec_context *ctx)
441 {
442 	struct aq_nic_s *nic = macsec_netdev_priv(ctx->netdev);
443 	struct aq_macsec_cfg *cfg = nic->macsec_cfg;
444 	const struct macsec_secy *secy = ctx->secy;
445 	enum aq_macsec_sc_sa sc_sa;
446 	u32 txsc_idx;
447 	int ret = 0;
448 
449 	if (secy->xpn)
450 		return -EOPNOTSUPP;
451 
452 	sc_sa = sc_sa_from_num_an(MACSEC_NUM_AN);
453 	if (sc_sa == aq_macsec_sa_sc_not_used)
454 		return -EINVAL;
455 
456 	if (hweight32(cfg->txsc_idx_busy) >= aq_sc_idx_max(sc_sa))
457 		return -ENOSPC;
458 
459 	txsc_idx = ffz(cfg->txsc_idx_busy);
460 	if (txsc_idx == AQ_MACSEC_MAX_SC)
461 		return -ENOSPC;
462 
463 	cfg->sc_sa = sc_sa;
464 	cfg->aq_txsc[txsc_idx].hw_sc_idx = aq_to_hw_sc_idx(txsc_idx, sc_sa);
465 	cfg->aq_txsc[txsc_idx].sw_secy = secy;
466 
467 	if (netif_carrier_ok(nic->ndev) && netif_running(secy->netdev))
468 		ret = aq_set_txsc(nic, txsc_idx);
469 
470 	set_bit(txsc_idx, &cfg->txsc_idx_busy);
471 
472 	return ret;
473 }
474 
aq_mdo_upd_secy(struct macsec_context * ctx)475 static int aq_mdo_upd_secy(struct macsec_context *ctx)
476 {
477 	struct aq_nic_s *nic = macsec_netdev_priv(ctx->netdev);
478 	const struct macsec_secy *secy = ctx->secy;
479 	int txsc_idx;
480 	int ret = 0;
481 
482 	txsc_idx = aq_get_txsc_idx_from_secy(nic->macsec_cfg, secy);
483 	if (txsc_idx < 0)
484 		return -ENOENT;
485 
486 	if (netif_carrier_ok(nic->ndev) && netif_running(secy->netdev))
487 		ret = aq_set_txsc(nic, txsc_idx);
488 
489 	return ret;
490 }
491 
aq_clear_txsc(struct aq_nic_s * nic,const int txsc_idx,enum aq_clear_type clear_type)492 static int aq_clear_txsc(struct aq_nic_s *nic, const int txsc_idx,
493 			 enum aq_clear_type clear_type)
494 {
495 	struct aq_macsec_txsc *tx_sc = &nic->macsec_cfg->aq_txsc[txsc_idx];
496 	struct aq_mss_egress_class_record tx_class_rec = { 0 };
497 	struct aq_mss_egress_sc_record sc_rec = { 0 };
498 	struct aq_hw_s *hw = nic->aq_hw;
499 	int ret = 0;
500 	int sa_num;
501 
502 	for_each_set_bit (sa_num, &tx_sc->tx_sa_idx_busy, AQ_MACSEC_MAX_SA) {
503 		ret = aq_clear_txsa(nic, tx_sc, sa_num, clear_type);
504 		if (ret)
505 			return ret;
506 	}
507 
508 	if (clear_type & AQ_CLEAR_HW) {
509 		ret = aq_mss_set_egress_class_record(hw, &tx_class_rec,
510 						     txsc_idx);
511 		if (ret)
512 			return ret;
513 
514 		sc_rec.fresh = 1;
515 		ret = aq_mss_set_egress_sc_record(hw, &sc_rec,
516 						  tx_sc->hw_sc_idx);
517 		if (ret)
518 			return ret;
519 	}
520 
521 	if (clear_type & AQ_CLEAR_SW) {
522 		clear_bit(txsc_idx, &nic->macsec_cfg->txsc_idx_busy);
523 		nic->macsec_cfg->aq_txsc[txsc_idx].sw_secy = NULL;
524 	}
525 
526 	return ret;
527 }
528 
aq_mdo_del_secy(struct macsec_context * ctx)529 static int aq_mdo_del_secy(struct macsec_context *ctx)
530 {
531 	struct aq_nic_s *nic = macsec_netdev_priv(ctx->netdev);
532 	int ret = 0;
533 
534 	if (!nic->macsec_cfg)
535 		return 0;
536 
537 	ret = aq_clear_secy(nic, ctx->secy, AQ_CLEAR_ALL);
538 
539 	return ret;
540 }
541 
aq_update_txsa(struct aq_nic_s * nic,const unsigned int sc_idx,const struct macsec_secy * secy,const struct macsec_tx_sa * tx_sa,const unsigned char * key,const unsigned char an)542 static int aq_update_txsa(struct aq_nic_s *nic, const unsigned int sc_idx,
543 			  const struct macsec_secy *secy,
544 			  const struct macsec_tx_sa *tx_sa,
545 			  const unsigned char *key, const unsigned char an)
546 {
547 	const u32 next_pn = tx_sa->next_pn_halves.lower;
548 	struct aq_mss_egress_sakey_record key_rec;
549 	const unsigned int sa_idx = sc_idx | an;
550 	struct aq_mss_egress_sa_record sa_rec;
551 	struct aq_hw_s *hw = nic->aq_hw;
552 	int ret = 0;
553 
554 	memset(&sa_rec, 0, sizeof(sa_rec));
555 	sa_rec.valid = tx_sa->active;
556 	sa_rec.fresh = 1;
557 	sa_rec.next_pn = next_pn;
558 
559 	ret = aq_mss_set_egress_sa_record(hw, &sa_rec, sa_idx);
560 	if (ret)
561 		return ret;
562 
563 	if (!key)
564 		return ret;
565 
566 	memset(&key_rec, 0, sizeof(key_rec));
567 	memcpy(&key_rec.key, key, secy->key_len);
568 
569 	aq_rotate_keys(&key_rec.key, secy->key_len);
570 
571 	ret = aq_mss_set_egress_sakey_record(hw, &key_rec, sa_idx);
572 
573 	memzero_explicit(&key_rec, sizeof(key_rec));
574 	return ret;
575 }
576 
aq_mdo_add_txsa(struct macsec_context * ctx)577 static int aq_mdo_add_txsa(struct macsec_context *ctx)
578 {
579 	struct aq_nic_s *nic = macsec_netdev_priv(ctx->netdev);
580 	struct aq_macsec_cfg *cfg = nic->macsec_cfg;
581 	const struct macsec_secy *secy = ctx->secy;
582 	struct aq_macsec_txsc *aq_txsc;
583 	int txsc_idx;
584 	int ret = 0;
585 
586 	txsc_idx = aq_get_txsc_idx_from_secy(cfg, secy);
587 	if (txsc_idx < 0)
588 		return -EINVAL;
589 
590 	aq_txsc = &cfg->aq_txsc[txsc_idx];
591 	set_bit(ctx->sa.assoc_num, &aq_txsc->tx_sa_idx_busy);
592 
593 	memcpy(aq_txsc->tx_sa_key[ctx->sa.assoc_num], ctx->sa.key,
594 	       secy->key_len);
595 
596 	if (netif_carrier_ok(nic->ndev) && netif_running(secy->netdev))
597 		ret = aq_update_txsa(nic, aq_txsc->hw_sc_idx, secy,
598 				     ctx->sa.tx_sa, ctx->sa.key,
599 				     ctx->sa.assoc_num);
600 
601 	return ret;
602 }
603 
aq_mdo_upd_txsa(struct macsec_context * ctx)604 static int aq_mdo_upd_txsa(struct macsec_context *ctx)
605 {
606 	struct aq_nic_s *nic = macsec_netdev_priv(ctx->netdev);
607 	struct aq_macsec_cfg *cfg = nic->macsec_cfg;
608 	const struct macsec_secy *secy = ctx->secy;
609 	struct aq_macsec_txsc *aq_txsc;
610 	int txsc_idx;
611 	int ret = 0;
612 
613 	txsc_idx = aq_get_txsc_idx_from_secy(cfg, secy);
614 	if (txsc_idx < 0)
615 		return -EINVAL;
616 
617 	aq_txsc = &cfg->aq_txsc[txsc_idx];
618 	if (netif_carrier_ok(nic->ndev) && netif_running(secy->netdev))
619 		ret = aq_update_txsa(nic, aq_txsc->hw_sc_idx, secy,
620 				     ctx->sa.tx_sa, NULL, ctx->sa.assoc_num);
621 
622 	return ret;
623 }
624 
aq_clear_txsa(struct aq_nic_s * nic,struct aq_macsec_txsc * aq_txsc,const int sa_num,enum aq_clear_type clear_type)625 static int aq_clear_txsa(struct aq_nic_s *nic, struct aq_macsec_txsc *aq_txsc,
626 			 const int sa_num, enum aq_clear_type clear_type)
627 {
628 	const int sa_idx = aq_txsc->hw_sc_idx | sa_num;
629 	struct aq_hw_s *hw = nic->aq_hw;
630 	int ret = 0;
631 
632 	if (clear_type & AQ_CLEAR_SW)
633 		clear_bit(sa_num, &aq_txsc->tx_sa_idx_busy);
634 
635 	if ((clear_type & AQ_CLEAR_HW) && netif_carrier_ok(nic->ndev)) {
636 		struct aq_mss_egress_sakey_record key_rec;
637 		struct aq_mss_egress_sa_record sa_rec;
638 
639 		memset(&sa_rec, 0, sizeof(sa_rec));
640 		sa_rec.fresh = 1;
641 
642 		ret = aq_mss_set_egress_sa_record(hw, &sa_rec, sa_idx);
643 		if (ret)
644 			return ret;
645 
646 		memset(&key_rec, 0, sizeof(key_rec));
647 		return aq_mss_set_egress_sakey_record(hw, &key_rec, sa_idx);
648 	}
649 
650 	return 0;
651 }
652 
aq_mdo_del_txsa(struct macsec_context * ctx)653 static int aq_mdo_del_txsa(struct macsec_context *ctx)
654 {
655 	struct aq_nic_s *nic = macsec_netdev_priv(ctx->netdev);
656 	struct aq_macsec_cfg *cfg = nic->macsec_cfg;
657 	int txsc_idx;
658 	int ret = 0;
659 
660 	txsc_idx = aq_get_txsc_idx_from_secy(cfg, ctx->secy);
661 	if (txsc_idx < 0)
662 		return -EINVAL;
663 
664 	ret = aq_clear_txsa(nic, &cfg->aq_txsc[txsc_idx], ctx->sa.assoc_num,
665 			    AQ_CLEAR_ALL);
666 
667 	return ret;
668 }
669 
aq_rxsc_validate_frames(const enum macsec_validation_type validate)670 static int aq_rxsc_validate_frames(const enum macsec_validation_type validate)
671 {
672 	switch (validate) {
673 	case MACSEC_VALIDATE_DISABLED:
674 		return 2;
675 	case MACSEC_VALIDATE_CHECK:
676 		return 1;
677 	case MACSEC_VALIDATE_STRICT:
678 		return 0;
679 	default:
680 		WARN_ONCE(true, "Invalid validation type");
681 	}
682 
683 	return 0;
684 }
685 
aq_set_rxsc(struct aq_nic_s * nic,const u32 rxsc_idx)686 static int aq_set_rxsc(struct aq_nic_s *nic, const u32 rxsc_idx)
687 {
688 	const struct aq_macsec_rxsc *aq_rxsc =
689 		&nic->macsec_cfg->aq_rxsc[rxsc_idx];
690 	struct aq_mss_ingress_preclass_record pre_class_record;
691 	const struct macsec_rx_sc *rx_sc = aq_rxsc->sw_rxsc;
692 	const struct macsec_secy *secy = aq_rxsc->sw_secy;
693 	const u32 hw_sc_idx = aq_rxsc->hw_sc_idx;
694 	struct aq_mss_ingress_sc_record sc_record;
695 	struct aq_hw_s *hw = nic->aq_hw;
696 	int ret = 0;
697 
698 	memset(&pre_class_record, 0, sizeof(pre_class_record));
699 	put_unaligned_be64((__force u64)rx_sc->sci, pre_class_record.sci);
700 	pre_class_record.sci_mask = 0xff;
701 	/* match all MACSEC ethertype packets */
702 	pre_class_record.eth_type = ETH_P_MACSEC;
703 	pre_class_record.eth_type_mask = 0x3;
704 
705 	aq_ether_addr_to_mac(pre_class_record.mac_sa, (char *)&rx_sc->sci);
706 	pre_class_record.sa_mask = 0x3f;
707 
708 	pre_class_record.an_mask = nic->macsec_cfg->sc_sa;
709 	pre_class_record.sc_idx = hw_sc_idx;
710 	/* strip SecTAG & forward for decryption */
711 	pre_class_record.action = 0x0;
712 	pre_class_record.valid = 1;
713 
714 	ret = aq_mss_set_ingress_preclass_record(hw, &pre_class_record,
715 						 2 * rxsc_idx + 1);
716 	if (ret)
717 		return ret;
718 
719 	/* If SCI is absent, then match by SA alone */
720 	pre_class_record.sci_mask = 0;
721 	pre_class_record.sci_from_table = 1;
722 
723 	ret = aq_mss_set_ingress_preclass_record(hw, &pre_class_record,
724 						 2 * rxsc_idx);
725 	if (ret)
726 		return ret;
727 
728 	memset(&sc_record, 0, sizeof(sc_record));
729 	sc_record.validate_frames =
730 		aq_rxsc_validate_frames(secy->validate_frames);
731 	if (secy->replay_protect) {
732 		sc_record.replay_protect = 1;
733 		sc_record.anti_replay_window = secy->replay_window;
734 	}
735 	sc_record.valid = 1;
736 	sc_record.fresh = 1;
737 
738 	ret = aq_mss_set_ingress_sc_record(hw, &sc_record, hw_sc_idx);
739 	if (ret)
740 		return ret;
741 
742 	return ret;
743 }
744 
aq_mdo_add_rxsc(struct macsec_context * ctx)745 static int aq_mdo_add_rxsc(struct macsec_context *ctx)
746 {
747 	struct aq_nic_s *nic = macsec_netdev_priv(ctx->netdev);
748 	struct aq_macsec_cfg *cfg = nic->macsec_cfg;
749 	const u32 rxsc_idx_max = aq_sc_idx_max(cfg->sc_sa);
750 	u32 rxsc_idx;
751 	int ret = 0;
752 
753 	if (hweight32(cfg->rxsc_idx_busy) >= rxsc_idx_max)
754 		return -ENOSPC;
755 
756 	rxsc_idx = ffz(cfg->rxsc_idx_busy);
757 	if (rxsc_idx >= rxsc_idx_max)
758 		return -ENOSPC;
759 
760 	cfg->aq_rxsc[rxsc_idx].hw_sc_idx = aq_to_hw_sc_idx(rxsc_idx,
761 							   cfg->sc_sa);
762 	cfg->aq_rxsc[rxsc_idx].sw_secy = ctx->secy;
763 	cfg->aq_rxsc[rxsc_idx].sw_rxsc = ctx->rx_sc;
764 
765 	if (netif_carrier_ok(nic->ndev) && netif_running(ctx->secy->netdev))
766 		ret = aq_set_rxsc(nic, rxsc_idx);
767 
768 	if (ret < 0)
769 		return ret;
770 
771 	set_bit(rxsc_idx, &cfg->rxsc_idx_busy);
772 
773 	return 0;
774 }
775 
aq_mdo_upd_rxsc(struct macsec_context * ctx)776 static int aq_mdo_upd_rxsc(struct macsec_context *ctx)
777 {
778 	struct aq_nic_s *nic = macsec_netdev_priv(ctx->netdev);
779 	int rxsc_idx;
780 	int ret = 0;
781 
782 	rxsc_idx = aq_get_rxsc_idx_from_rxsc(nic->macsec_cfg, ctx->rx_sc);
783 	if (rxsc_idx < 0)
784 		return -ENOENT;
785 
786 	if (netif_carrier_ok(nic->ndev) && netif_running(ctx->secy->netdev))
787 		ret = aq_set_rxsc(nic, rxsc_idx);
788 
789 	return ret;
790 }
791 
aq_clear_rxsc(struct aq_nic_s * nic,const int rxsc_idx,enum aq_clear_type clear_type)792 static int aq_clear_rxsc(struct aq_nic_s *nic, const int rxsc_idx,
793 			 enum aq_clear_type clear_type)
794 {
795 	struct aq_macsec_rxsc *rx_sc = &nic->macsec_cfg->aq_rxsc[rxsc_idx];
796 	struct aq_hw_s *hw = nic->aq_hw;
797 	int ret = 0;
798 	int sa_num;
799 
800 	for_each_set_bit (sa_num, &rx_sc->rx_sa_idx_busy, AQ_MACSEC_MAX_SA) {
801 		ret = aq_clear_rxsa(nic, rx_sc, sa_num, clear_type);
802 		if (ret)
803 			return ret;
804 	}
805 
806 	if (clear_type & AQ_CLEAR_HW) {
807 		struct aq_mss_ingress_preclass_record pre_class_record;
808 		struct aq_mss_ingress_sc_record sc_record;
809 
810 		memset(&pre_class_record, 0, sizeof(pre_class_record));
811 		memset(&sc_record, 0, sizeof(sc_record));
812 
813 		ret = aq_mss_set_ingress_preclass_record(hw, &pre_class_record,
814 							 2 * rxsc_idx);
815 		if (ret)
816 			return ret;
817 
818 		ret = aq_mss_set_ingress_preclass_record(hw, &pre_class_record,
819 							 2 * rxsc_idx + 1);
820 		if (ret)
821 			return ret;
822 
823 		sc_record.fresh = 1;
824 		ret = aq_mss_set_ingress_sc_record(hw, &sc_record,
825 						   rx_sc->hw_sc_idx);
826 		if (ret)
827 			return ret;
828 	}
829 
830 	if (clear_type & AQ_CLEAR_SW) {
831 		clear_bit(rxsc_idx, &nic->macsec_cfg->rxsc_idx_busy);
832 		rx_sc->sw_secy = NULL;
833 		rx_sc->sw_rxsc = NULL;
834 	}
835 
836 	return ret;
837 }
838 
aq_mdo_del_rxsc(struct macsec_context * ctx)839 static int aq_mdo_del_rxsc(struct macsec_context *ctx)
840 {
841 	struct aq_nic_s *nic = macsec_netdev_priv(ctx->netdev);
842 	enum aq_clear_type clear_type = AQ_CLEAR_SW;
843 	int rxsc_idx;
844 	int ret = 0;
845 
846 	rxsc_idx = aq_get_rxsc_idx_from_rxsc(nic->macsec_cfg, ctx->rx_sc);
847 	if (rxsc_idx < 0)
848 		return -ENOENT;
849 
850 	if (netif_carrier_ok(nic->ndev))
851 		clear_type = AQ_CLEAR_ALL;
852 
853 	ret = aq_clear_rxsc(nic, rxsc_idx, clear_type);
854 
855 	return ret;
856 }
857 
aq_update_rxsa(struct aq_nic_s * nic,const unsigned int sc_idx,const struct macsec_secy * secy,const struct macsec_rx_sa * rx_sa,const unsigned char * key,const unsigned char an)858 static int aq_update_rxsa(struct aq_nic_s *nic, const unsigned int sc_idx,
859 			  const struct macsec_secy *secy,
860 			  const struct macsec_rx_sa *rx_sa,
861 			  const unsigned char *key, const unsigned char an)
862 {
863 	struct aq_mss_ingress_sakey_record sa_key_record;
864 	const u32 next_pn = rx_sa->next_pn_halves.lower;
865 	struct aq_mss_ingress_sa_record sa_record;
866 	struct aq_hw_s *hw = nic->aq_hw;
867 	const int sa_idx = sc_idx | an;
868 	int ret = 0;
869 
870 	memset(&sa_record, 0, sizeof(sa_record));
871 	sa_record.valid = rx_sa->active;
872 	sa_record.fresh = 1;
873 	sa_record.next_pn = next_pn;
874 
875 	ret = aq_mss_set_ingress_sa_record(hw, &sa_record, sa_idx);
876 	if (ret)
877 		return ret;
878 
879 	if (!key)
880 		return ret;
881 
882 	memset(&sa_key_record, 0, sizeof(sa_key_record));
883 	memcpy(&sa_key_record.key, key, secy->key_len);
884 
885 	switch (secy->key_len) {
886 	case AQ_MACSEC_KEY_LEN_128_BIT:
887 		sa_key_record.key_len = 0;
888 		break;
889 	case AQ_MACSEC_KEY_LEN_192_BIT:
890 		sa_key_record.key_len = 1;
891 		break;
892 	case AQ_MACSEC_KEY_LEN_256_BIT:
893 		sa_key_record.key_len = 2;
894 		break;
895 	default:
896 		return -1;
897 	}
898 
899 	aq_rotate_keys(&sa_key_record.key, secy->key_len);
900 
901 	ret = aq_mss_set_ingress_sakey_record(hw, &sa_key_record, sa_idx);
902 
903 	memzero_explicit(&sa_key_record, sizeof(sa_key_record));
904 	return ret;
905 }
906 
aq_mdo_add_rxsa(struct macsec_context * ctx)907 static int aq_mdo_add_rxsa(struct macsec_context *ctx)
908 {
909 	struct aq_nic_s *nic = macsec_netdev_priv(ctx->netdev);
910 	const struct macsec_rx_sc *rx_sc = ctx->sa.rx_sa->sc;
911 	const struct macsec_secy *secy = ctx->secy;
912 	struct aq_macsec_rxsc *aq_rxsc;
913 	int rxsc_idx;
914 	int ret = 0;
915 
916 	rxsc_idx = aq_get_rxsc_idx_from_rxsc(nic->macsec_cfg, rx_sc);
917 	if (rxsc_idx < 0)
918 		return -EINVAL;
919 
920 	aq_rxsc = &nic->macsec_cfg->aq_rxsc[rxsc_idx];
921 	set_bit(ctx->sa.assoc_num, &aq_rxsc->rx_sa_idx_busy);
922 
923 	memcpy(aq_rxsc->rx_sa_key[ctx->sa.assoc_num], ctx->sa.key,
924 	       secy->key_len);
925 
926 	if (netif_carrier_ok(nic->ndev) && netif_running(secy->netdev))
927 		ret = aq_update_rxsa(nic, aq_rxsc->hw_sc_idx, secy,
928 				     ctx->sa.rx_sa, ctx->sa.key,
929 				     ctx->sa.assoc_num);
930 
931 	return ret;
932 }
933 
aq_mdo_upd_rxsa(struct macsec_context * ctx)934 static int aq_mdo_upd_rxsa(struct macsec_context *ctx)
935 {
936 	struct aq_nic_s *nic = macsec_netdev_priv(ctx->netdev);
937 	const struct macsec_rx_sc *rx_sc = ctx->sa.rx_sa->sc;
938 	struct aq_macsec_cfg *cfg = nic->macsec_cfg;
939 	const struct macsec_secy *secy = ctx->secy;
940 	int rxsc_idx;
941 	int ret = 0;
942 
943 	rxsc_idx = aq_get_rxsc_idx_from_rxsc(cfg, rx_sc);
944 	if (rxsc_idx < 0)
945 		return -EINVAL;
946 
947 	if (netif_carrier_ok(nic->ndev) && netif_running(secy->netdev))
948 		ret = aq_update_rxsa(nic, cfg->aq_rxsc[rxsc_idx].hw_sc_idx,
949 				     secy, ctx->sa.rx_sa, NULL,
950 				     ctx->sa.assoc_num);
951 
952 	return ret;
953 }
954 
aq_clear_rxsa(struct aq_nic_s * nic,struct aq_macsec_rxsc * aq_rxsc,const int sa_num,enum aq_clear_type clear_type)955 static int aq_clear_rxsa(struct aq_nic_s *nic, struct aq_macsec_rxsc *aq_rxsc,
956 			 const int sa_num, enum aq_clear_type clear_type)
957 {
958 	int sa_idx = aq_rxsc->hw_sc_idx | sa_num;
959 	struct aq_hw_s *hw = nic->aq_hw;
960 	int ret = 0;
961 
962 	if (clear_type & AQ_CLEAR_SW)
963 		clear_bit(sa_num, &aq_rxsc->rx_sa_idx_busy);
964 
965 	if ((clear_type & AQ_CLEAR_HW) && netif_carrier_ok(nic->ndev)) {
966 		struct aq_mss_ingress_sakey_record sa_key_record;
967 		struct aq_mss_ingress_sa_record sa_record;
968 
969 		memset(&sa_key_record, 0, sizeof(sa_key_record));
970 		memset(&sa_record, 0, sizeof(sa_record));
971 		sa_record.fresh = 1;
972 		ret = aq_mss_set_ingress_sa_record(hw, &sa_record, sa_idx);
973 		if (ret)
974 			return ret;
975 
976 		return aq_mss_set_ingress_sakey_record(hw, &sa_key_record,
977 						       sa_idx);
978 	}
979 
980 	return ret;
981 }
982 
aq_mdo_del_rxsa(struct macsec_context * ctx)983 static int aq_mdo_del_rxsa(struct macsec_context *ctx)
984 {
985 	struct aq_nic_s *nic = macsec_netdev_priv(ctx->netdev);
986 	const struct macsec_rx_sc *rx_sc = ctx->sa.rx_sa->sc;
987 	struct aq_macsec_cfg *cfg = nic->macsec_cfg;
988 	int rxsc_idx;
989 	int ret = 0;
990 
991 	rxsc_idx = aq_get_rxsc_idx_from_rxsc(cfg, rx_sc);
992 	if (rxsc_idx < 0)
993 		return -EINVAL;
994 
995 	ret = aq_clear_rxsa(nic, &cfg->aq_rxsc[rxsc_idx], ctx->sa.assoc_num,
996 			    AQ_CLEAR_ALL);
997 
998 	return ret;
999 }
1000 
aq_mdo_get_dev_stats(struct macsec_context * ctx)1001 static int aq_mdo_get_dev_stats(struct macsec_context *ctx)
1002 {
1003 	struct aq_nic_s *nic = macsec_netdev_priv(ctx->netdev);
1004 	struct aq_macsec_common_stats *stats = &nic->macsec_cfg->stats;
1005 	struct aq_hw_s *hw = nic->aq_hw;
1006 
1007 	aq_get_macsec_common_stats(hw, stats);
1008 
1009 	ctx->stats.dev_stats->OutPktsUntagged = stats->out.untagged_pkts;
1010 	ctx->stats.dev_stats->InPktsUntagged = stats->in.untagged_pkts;
1011 	ctx->stats.dev_stats->OutPktsTooLong = stats->out.too_long;
1012 	ctx->stats.dev_stats->InPktsNoTag = stats->in.notag_pkts;
1013 	ctx->stats.dev_stats->InPktsBadTag = stats->in.bad_tag_pkts;
1014 	ctx->stats.dev_stats->InPktsUnknownSCI = stats->in.unknown_sci_pkts;
1015 	ctx->stats.dev_stats->InPktsNoSCI = stats->in.no_sci_pkts;
1016 	ctx->stats.dev_stats->InPktsOverrun = 0;
1017 
1018 	return 0;
1019 }
1020 
aq_mdo_get_tx_sc_stats(struct macsec_context * ctx)1021 static int aq_mdo_get_tx_sc_stats(struct macsec_context *ctx)
1022 {
1023 	struct aq_nic_s *nic = macsec_netdev_priv(ctx->netdev);
1024 	struct aq_macsec_tx_sc_stats *stats;
1025 	struct aq_hw_s *hw = nic->aq_hw;
1026 	struct aq_macsec_txsc *aq_txsc;
1027 	int txsc_idx;
1028 
1029 	txsc_idx = aq_get_txsc_idx_from_secy(nic->macsec_cfg, ctx->secy);
1030 	if (txsc_idx < 0)
1031 		return -ENOENT;
1032 
1033 	aq_txsc = &nic->macsec_cfg->aq_txsc[txsc_idx];
1034 	stats = &aq_txsc->stats;
1035 	aq_get_txsc_stats(hw, aq_txsc->hw_sc_idx, stats);
1036 
1037 	ctx->stats.tx_sc_stats->OutPktsProtected = stats->sc_protected_pkts;
1038 	ctx->stats.tx_sc_stats->OutPktsEncrypted = stats->sc_encrypted_pkts;
1039 	ctx->stats.tx_sc_stats->OutOctetsProtected = stats->sc_protected_octets;
1040 	ctx->stats.tx_sc_stats->OutOctetsEncrypted = stats->sc_encrypted_octets;
1041 
1042 	return 0;
1043 }
1044 
aq_mdo_get_tx_sa_stats(struct macsec_context * ctx)1045 static int aq_mdo_get_tx_sa_stats(struct macsec_context *ctx)
1046 {
1047 	struct aq_nic_s *nic = macsec_netdev_priv(ctx->netdev);
1048 	struct aq_macsec_cfg *cfg = nic->macsec_cfg;
1049 	struct aq_macsec_tx_sa_stats *stats;
1050 	struct aq_hw_s *hw = nic->aq_hw;
1051 	const struct macsec_secy *secy;
1052 	struct aq_macsec_txsc *aq_txsc;
1053 	struct macsec_tx_sa *tx_sa;
1054 	unsigned int sa_idx;
1055 	int txsc_idx;
1056 	u32 next_pn;
1057 	int ret;
1058 
1059 	txsc_idx = aq_get_txsc_idx_from_secy(cfg, ctx->secy);
1060 	if (txsc_idx < 0)
1061 		return -EINVAL;
1062 
1063 	aq_txsc = &cfg->aq_txsc[txsc_idx];
1064 	sa_idx = aq_txsc->hw_sc_idx | ctx->sa.assoc_num;
1065 	stats = &aq_txsc->tx_sa_stats[ctx->sa.assoc_num];
1066 	ret = aq_get_txsa_stats(hw, sa_idx, stats);
1067 	if (ret)
1068 		return ret;
1069 
1070 	ctx->stats.tx_sa_stats->OutPktsProtected = stats->sa_protected_pkts;
1071 	ctx->stats.tx_sa_stats->OutPktsEncrypted = stats->sa_encrypted_pkts;
1072 
1073 	secy = aq_txsc->sw_secy;
1074 	tx_sa = rcu_dereference_bh(secy->tx_sc.sa[ctx->sa.assoc_num]);
1075 	ret = aq_get_txsa_next_pn(hw, sa_idx, &next_pn);
1076 	if (ret == 0) {
1077 		spin_lock_bh(&tx_sa->lock);
1078 		tx_sa->next_pn = next_pn;
1079 		spin_unlock_bh(&tx_sa->lock);
1080 	}
1081 
1082 	return ret;
1083 }
1084 
aq_mdo_get_rx_sc_stats(struct macsec_context * ctx)1085 static int aq_mdo_get_rx_sc_stats(struct macsec_context *ctx)
1086 {
1087 	struct aq_nic_s *nic = macsec_netdev_priv(ctx->netdev);
1088 	struct aq_macsec_cfg *cfg = nic->macsec_cfg;
1089 	struct aq_macsec_rx_sa_stats *stats;
1090 	struct aq_hw_s *hw = nic->aq_hw;
1091 	struct aq_macsec_rxsc *aq_rxsc;
1092 	unsigned int sa_idx;
1093 	int rxsc_idx;
1094 	int ret = 0;
1095 	int i;
1096 
1097 	rxsc_idx = aq_get_rxsc_idx_from_rxsc(cfg, ctx->rx_sc);
1098 	if (rxsc_idx < 0)
1099 		return -ENOENT;
1100 
1101 	aq_rxsc = &cfg->aq_rxsc[rxsc_idx];
1102 	for (i = 0; i < MACSEC_NUM_AN; i++) {
1103 		if (!test_bit(i, &aq_rxsc->rx_sa_idx_busy))
1104 			continue;
1105 
1106 		stats = &aq_rxsc->rx_sa_stats[i];
1107 		sa_idx = aq_rxsc->hw_sc_idx | i;
1108 		ret = aq_get_rxsa_stats(hw, sa_idx, stats);
1109 		if (ret)
1110 			break;
1111 
1112 		ctx->stats.rx_sc_stats->InOctetsValidated +=
1113 			stats->validated_octets;
1114 		ctx->stats.rx_sc_stats->InOctetsDecrypted +=
1115 			stats->decrypted_octets;
1116 		ctx->stats.rx_sc_stats->InPktsUnchecked +=
1117 			stats->unchecked_pkts;
1118 		ctx->stats.rx_sc_stats->InPktsDelayed += stats->delayed_pkts;
1119 		ctx->stats.rx_sc_stats->InPktsOK += stats->ok_pkts;
1120 		ctx->stats.rx_sc_stats->InPktsInvalid += stats->invalid_pkts;
1121 		ctx->stats.rx_sc_stats->InPktsLate += stats->late_pkts;
1122 		ctx->stats.rx_sc_stats->InPktsNotValid += stats->not_valid_pkts;
1123 		ctx->stats.rx_sc_stats->InPktsNotUsingSA += stats->not_using_sa;
1124 		ctx->stats.rx_sc_stats->InPktsUnusedSA += stats->unused_sa;
1125 	}
1126 
1127 	return ret;
1128 }
1129 
aq_mdo_get_rx_sa_stats(struct macsec_context * ctx)1130 static int aq_mdo_get_rx_sa_stats(struct macsec_context *ctx)
1131 {
1132 	struct aq_nic_s *nic = macsec_netdev_priv(ctx->netdev);
1133 	struct aq_macsec_cfg *cfg = nic->macsec_cfg;
1134 	struct aq_macsec_rx_sa_stats *stats;
1135 	struct aq_hw_s *hw = nic->aq_hw;
1136 	struct aq_macsec_rxsc *aq_rxsc;
1137 	struct macsec_rx_sa *rx_sa;
1138 	unsigned int sa_idx;
1139 	int rxsc_idx;
1140 	u32 next_pn;
1141 	int ret;
1142 
1143 	rxsc_idx = aq_get_rxsc_idx_from_rxsc(cfg, ctx->rx_sc);
1144 	if (rxsc_idx < 0)
1145 		return -EINVAL;
1146 
1147 	aq_rxsc = &cfg->aq_rxsc[rxsc_idx];
1148 	stats = &aq_rxsc->rx_sa_stats[ctx->sa.assoc_num];
1149 	sa_idx = aq_rxsc->hw_sc_idx | ctx->sa.assoc_num;
1150 	ret = aq_get_rxsa_stats(hw, sa_idx, stats);
1151 	if (ret)
1152 		return ret;
1153 
1154 	ctx->stats.rx_sa_stats->InPktsOK = stats->ok_pkts;
1155 	ctx->stats.rx_sa_stats->InPktsInvalid = stats->invalid_pkts;
1156 	ctx->stats.rx_sa_stats->InPktsNotValid = stats->not_valid_pkts;
1157 	ctx->stats.rx_sa_stats->InPktsNotUsingSA = stats->not_using_sa;
1158 	ctx->stats.rx_sa_stats->InPktsUnusedSA = stats->unused_sa;
1159 
1160 	rx_sa = rcu_dereference_bh(aq_rxsc->sw_rxsc->sa[ctx->sa.assoc_num]);
1161 	ret = aq_get_rxsa_next_pn(hw, sa_idx, &next_pn);
1162 	if (ret == 0) {
1163 		spin_lock_bh(&rx_sa->lock);
1164 		rx_sa->next_pn = next_pn;
1165 		spin_unlock_bh(&rx_sa->lock);
1166 	}
1167 
1168 	return ret;
1169 }
1170 
apply_txsc_cfg(struct aq_nic_s * nic,const int txsc_idx)1171 static int apply_txsc_cfg(struct aq_nic_s *nic, const int txsc_idx)
1172 {
1173 	struct aq_macsec_txsc *aq_txsc = &nic->macsec_cfg->aq_txsc[txsc_idx];
1174 	const struct macsec_secy *secy = aq_txsc->sw_secy;
1175 	struct macsec_tx_sa *tx_sa;
1176 	int ret = 0;
1177 	int i;
1178 
1179 	if (!netif_running(secy->netdev))
1180 		return ret;
1181 
1182 	ret = aq_set_txsc(nic, txsc_idx);
1183 	if (ret)
1184 		return ret;
1185 
1186 	for (i = 0; i < MACSEC_NUM_AN; i++) {
1187 		tx_sa = rcu_dereference_bh(secy->tx_sc.sa[i]);
1188 		if (tx_sa) {
1189 			ret = aq_update_txsa(nic, aq_txsc->hw_sc_idx, secy,
1190 					     tx_sa, aq_txsc->tx_sa_key[i], i);
1191 			if (ret)
1192 				return ret;
1193 		}
1194 	}
1195 
1196 	return ret;
1197 }
1198 
apply_rxsc_cfg(struct aq_nic_s * nic,const int rxsc_idx)1199 static int apply_rxsc_cfg(struct aq_nic_s *nic, const int rxsc_idx)
1200 {
1201 	struct aq_macsec_rxsc *aq_rxsc = &nic->macsec_cfg->aq_rxsc[rxsc_idx];
1202 	const struct macsec_secy *secy = aq_rxsc->sw_secy;
1203 	struct macsec_rx_sa *rx_sa;
1204 	int ret = 0;
1205 	int i;
1206 
1207 	if (!netif_running(secy->netdev))
1208 		return ret;
1209 
1210 	ret = aq_set_rxsc(nic, rxsc_idx);
1211 	if (ret)
1212 		return ret;
1213 
1214 	for (i = 0; i < MACSEC_NUM_AN; i++) {
1215 		rx_sa = rcu_dereference_bh(aq_rxsc->sw_rxsc->sa[i]);
1216 		if (rx_sa) {
1217 			ret = aq_update_rxsa(nic, aq_rxsc->hw_sc_idx, secy,
1218 					     rx_sa, aq_rxsc->rx_sa_key[i], i);
1219 			if (ret)
1220 				return ret;
1221 		}
1222 	}
1223 
1224 	return ret;
1225 }
1226 
aq_clear_secy(struct aq_nic_s * nic,const struct macsec_secy * secy,enum aq_clear_type clear_type)1227 static int aq_clear_secy(struct aq_nic_s *nic, const struct macsec_secy *secy,
1228 			 enum aq_clear_type clear_type)
1229 {
1230 	struct macsec_rx_sc *rx_sc;
1231 	int txsc_idx;
1232 	int rxsc_idx;
1233 	int ret = 0;
1234 
1235 	txsc_idx = aq_get_txsc_idx_from_secy(nic->macsec_cfg, secy);
1236 	if (txsc_idx >= 0) {
1237 		ret = aq_clear_txsc(nic, txsc_idx, clear_type);
1238 		if (ret)
1239 			return ret;
1240 	}
1241 
1242 	for (rx_sc = rcu_dereference_bh(secy->rx_sc); rx_sc;
1243 	     rx_sc = rcu_dereference_bh(rx_sc->next)) {
1244 		rxsc_idx = aq_get_rxsc_idx_from_rxsc(nic->macsec_cfg, rx_sc);
1245 		if (rxsc_idx < 0)
1246 			continue;
1247 
1248 		ret = aq_clear_rxsc(nic, rxsc_idx, clear_type);
1249 		if (ret)
1250 			return ret;
1251 	}
1252 
1253 	return ret;
1254 }
1255 
aq_apply_secy_cfg(struct aq_nic_s * nic,const struct macsec_secy * secy)1256 static int aq_apply_secy_cfg(struct aq_nic_s *nic,
1257 			     const struct macsec_secy *secy)
1258 {
1259 	struct macsec_rx_sc *rx_sc;
1260 	int txsc_idx;
1261 	int rxsc_idx;
1262 	int ret = 0;
1263 
1264 	txsc_idx = aq_get_txsc_idx_from_secy(nic->macsec_cfg, secy);
1265 	if (txsc_idx >= 0)
1266 		apply_txsc_cfg(nic, txsc_idx);
1267 
1268 	for (rx_sc = rcu_dereference_bh(secy->rx_sc); rx_sc && rx_sc->active;
1269 	     rx_sc = rcu_dereference_bh(rx_sc->next)) {
1270 		rxsc_idx = aq_get_rxsc_idx_from_rxsc(nic->macsec_cfg, rx_sc);
1271 		if (unlikely(rxsc_idx < 0))
1272 			continue;
1273 
1274 		ret = apply_rxsc_cfg(nic, rxsc_idx);
1275 		if (ret)
1276 			return ret;
1277 	}
1278 
1279 	return ret;
1280 }
1281 
aq_apply_macsec_cfg(struct aq_nic_s * nic)1282 static int aq_apply_macsec_cfg(struct aq_nic_s *nic)
1283 {
1284 	int ret = 0;
1285 	int i;
1286 
1287 	for (i = 0; i < AQ_MACSEC_MAX_SC; i++) {
1288 		if (nic->macsec_cfg->txsc_idx_busy & BIT(i)) {
1289 			ret = apply_txsc_cfg(nic, i);
1290 			if (ret)
1291 				return ret;
1292 		}
1293 	}
1294 
1295 	for (i = 0; i < AQ_MACSEC_MAX_SC; i++) {
1296 		if (nic->macsec_cfg->rxsc_idx_busy & BIT(i)) {
1297 			ret = apply_rxsc_cfg(nic, i);
1298 			if (ret)
1299 				return ret;
1300 		}
1301 	}
1302 
1303 	return ret;
1304 }
1305 
aq_sa_from_sa_idx(const enum aq_macsec_sc_sa sc_sa,const int sa_idx)1306 static int aq_sa_from_sa_idx(const enum aq_macsec_sc_sa sc_sa, const int sa_idx)
1307 {
1308 	switch (sc_sa) {
1309 	case aq_macsec_sa_sc_4sa_8sc:
1310 		return sa_idx & 3;
1311 	case aq_macsec_sa_sc_2sa_16sc:
1312 		return sa_idx & 1;
1313 	case aq_macsec_sa_sc_1sa_32sc:
1314 		return 0;
1315 	default:
1316 		WARN_ONCE(true, "Invalid sc_sa");
1317 	}
1318 	return -EINVAL;
1319 }
1320 
aq_sc_idx_from_sa_idx(const enum aq_macsec_sc_sa sc_sa,const int sa_idx)1321 static int aq_sc_idx_from_sa_idx(const enum aq_macsec_sc_sa sc_sa,
1322 				 const int sa_idx)
1323 {
1324 	switch (sc_sa) {
1325 	case aq_macsec_sa_sc_4sa_8sc:
1326 		return sa_idx & ~3;
1327 	case aq_macsec_sa_sc_2sa_16sc:
1328 		return sa_idx & ~1;
1329 	case aq_macsec_sa_sc_1sa_32sc:
1330 		return sa_idx;
1331 	default:
1332 		WARN_ONCE(true, "Invalid sc_sa");
1333 	}
1334 	return -EINVAL;
1335 }
1336 
aq_check_txsa_expiration(struct aq_nic_s * nic)1337 static void aq_check_txsa_expiration(struct aq_nic_s *nic)
1338 {
1339 	u32 egress_sa_expired, egress_sa_threshold_expired;
1340 	struct aq_macsec_cfg *cfg = nic->macsec_cfg;
1341 	struct aq_hw_s *hw = nic->aq_hw;
1342 	struct aq_macsec_txsc *aq_txsc;
1343 	const struct macsec_secy *secy;
1344 	int sc_idx = 0, txsc_idx = 0;
1345 	enum aq_macsec_sc_sa sc_sa;
1346 	struct macsec_tx_sa *tx_sa;
1347 	unsigned char an = 0;
1348 	int ret;
1349 	int i;
1350 
1351 	sc_sa = cfg->sc_sa;
1352 
1353 	ret = aq_mss_get_egress_sa_expired(hw, &egress_sa_expired);
1354 	if (unlikely(ret))
1355 		return;
1356 
1357 	ret = aq_mss_get_egress_sa_threshold_expired(hw,
1358 		&egress_sa_threshold_expired);
1359 
1360 	for (i = 0; i < AQ_MACSEC_MAX_SA; i++) {
1361 		if (egress_sa_expired & BIT(i)) {
1362 			an = aq_sa_from_sa_idx(sc_sa, i);
1363 			sc_idx = aq_sc_idx_from_sa_idx(sc_sa, i);
1364 			txsc_idx = aq_get_txsc_idx_from_sc_idx(sc_sa, sc_idx);
1365 			if (txsc_idx < 0)
1366 				continue;
1367 
1368 			aq_txsc = &cfg->aq_txsc[txsc_idx];
1369 			if (!(cfg->txsc_idx_busy & BIT(txsc_idx))) {
1370 				netdev_warn(nic->ndev,
1371 					"PN threshold expired on invalid TX SC");
1372 				continue;
1373 			}
1374 
1375 			secy = aq_txsc->sw_secy;
1376 			if (!netif_running(secy->netdev)) {
1377 				netdev_warn(nic->ndev,
1378 					"PN threshold expired on down TX SC");
1379 				continue;
1380 			}
1381 
1382 			if (unlikely(!(aq_txsc->tx_sa_idx_busy & BIT(an)))) {
1383 				netdev_warn(nic->ndev,
1384 					"PN threshold expired on invalid TX SA");
1385 				continue;
1386 			}
1387 
1388 			tx_sa = rcu_dereference_bh(secy->tx_sc.sa[an]);
1389 			macsec_pn_wrapped((struct macsec_secy *)secy, tx_sa);
1390 		}
1391 	}
1392 
1393 	aq_mss_set_egress_sa_expired(hw, egress_sa_expired);
1394 	if (likely(!ret))
1395 		aq_mss_set_egress_sa_threshold_expired(hw,
1396 			egress_sa_threshold_expired);
1397 }
1398 
1399 #define AQ_LOCKED_MDO_DEF(mdo)						\
1400 static int aq_locked_mdo_##mdo(struct macsec_context *ctx)		\
1401 {									\
1402 	struct aq_nic_s *nic = macsec_netdev_priv(ctx->netdev);		\
1403 	int ret;							\
1404 	mutex_lock(&nic->macsec_mutex);					\
1405 	ret = aq_mdo_##mdo(ctx);					\
1406 	mutex_unlock(&nic->macsec_mutex);				\
1407 	return ret;							\
1408 }
1409 
1410 AQ_LOCKED_MDO_DEF(dev_open)
1411 AQ_LOCKED_MDO_DEF(dev_stop)
1412 AQ_LOCKED_MDO_DEF(add_secy)
1413 AQ_LOCKED_MDO_DEF(upd_secy)
1414 AQ_LOCKED_MDO_DEF(del_secy)
1415 AQ_LOCKED_MDO_DEF(add_rxsc)
1416 AQ_LOCKED_MDO_DEF(upd_rxsc)
1417 AQ_LOCKED_MDO_DEF(del_rxsc)
1418 AQ_LOCKED_MDO_DEF(add_rxsa)
1419 AQ_LOCKED_MDO_DEF(upd_rxsa)
1420 AQ_LOCKED_MDO_DEF(del_rxsa)
1421 AQ_LOCKED_MDO_DEF(add_txsa)
1422 AQ_LOCKED_MDO_DEF(upd_txsa)
1423 AQ_LOCKED_MDO_DEF(del_txsa)
1424 AQ_LOCKED_MDO_DEF(get_dev_stats)
1425 AQ_LOCKED_MDO_DEF(get_tx_sc_stats)
1426 AQ_LOCKED_MDO_DEF(get_tx_sa_stats)
1427 AQ_LOCKED_MDO_DEF(get_rx_sc_stats)
1428 AQ_LOCKED_MDO_DEF(get_rx_sa_stats)
1429 
1430 const struct macsec_ops aq_macsec_ops = {
1431 	.mdo_dev_open = aq_locked_mdo_dev_open,
1432 	.mdo_dev_stop = aq_locked_mdo_dev_stop,
1433 	.mdo_add_secy = aq_locked_mdo_add_secy,
1434 	.mdo_upd_secy = aq_locked_mdo_upd_secy,
1435 	.mdo_del_secy = aq_locked_mdo_del_secy,
1436 	.mdo_add_rxsc = aq_locked_mdo_add_rxsc,
1437 	.mdo_upd_rxsc = aq_locked_mdo_upd_rxsc,
1438 	.mdo_del_rxsc = aq_locked_mdo_del_rxsc,
1439 	.mdo_add_rxsa = aq_locked_mdo_add_rxsa,
1440 	.mdo_upd_rxsa = aq_locked_mdo_upd_rxsa,
1441 	.mdo_del_rxsa = aq_locked_mdo_del_rxsa,
1442 	.mdo_add_txsa = aq_locked_mdo_add_txsa,
1443 	.mdo_upd_txsa = aq_locked_mdo_upd_txsa,
1444 	.mdo_del_txsa = aq_locked_mdo_del_txsa,
1445 	.mdo_get_dev_stats = aq_locked_mdo_get_dev_stats,
1446 	.mdo_get_tx_sc_stats = aq_locked_mdo_get_tx_sc_stats,
1447 	.mdo_get_tx_sa_stats = aq_locked_mdo_get_tx_sa_stats,
1448 	.mdo_get_rx_sc_stats = aq_locked_mdo_get_rx_sc_stats,
1449 	.mdo_get_rx_sa_stats = aq_locked_mdo_get_rx_sa_stats,
1450 };
1451 
aq_macsec_init(struct aq_nic_s * nic)1452 int aq_macsec_init(struct aq_nic_s *nic)
1453 {
1454 	struct aq_macsec_cfg *cfg;
1455 	u32 caps_lo;
1456 
1457 	if (!nic->aq_fw_ops->get_link_capabilities)
1458 		return 0;
1459 
1460 	caps_lo = nic->aq_fw_ops->get_link_capabilities(nic->aq_hw);
1461 
1462 	if (!(caps_lo & BIT(CAPS_LO_MACSEC)))
1463 		return 0;
1464 
1465 	nic->macsec_cfg = kzalloc(sizeof(*cfg), GFP_KERNEL);
1466 	if (!nic->macsec_cfg)
1467 		return -ENOMEM;
1468 
1469 	nic->ndev->features |= NETIF_F_HW_MACSEC;
1470 	nic->ndev->macsec_ops = &aq_macsec_ops;
1471 	mutex_init(&nic->macsec_mutex);
1472 
1473 	return 0;
1474 }
1475 
aq_macsec_free(struct aq_nic_s * nic)1476 void aq_macsec_free(struct aq_nic_s *nic)
1477 {
1478 	kfree(nic->macsec_cfg);
1479 	nic->macsec_cfg = NULL;
1480 }
1481 
aq_macsec_enable(struct aq_nic_s * nic)1482 int aq_macsec_enable(struct aq_nic_s *nic)
1483 {
1484 	u32 ctl_ether_types[1] = { ETH_P_PAE };
1485 	struct macsec_msg_fw_response resp = { 0 };
1486 	struct macsec_msg_fw_request msg = { 0 };
1487 	struct aq_hw_s *hw = nic->aq_hw;
1488 	int num_ctl_ether_types = 0;
1489 	int index = 0, tbl_idx;
1490 	int ret;
1491 
1492 	if (!nic->macsec_cfg)
1493 		return 0;
1494 
1495 	mutex_lock(&nic->macsec_mutex);
1496 
1497 	if (nic->aq_fw_ops->send_macsec_req) {
1498 		struct macsec_cfg_request cfg = { 0 };
1499 
1500 		cfg.enabled = 1;
1501 		cfg.egress_threshold = 0xffffffff;
1502 		cfg.ingress_threshold = 0xffffffff;
1503 		cfg.interrupts_enabled = 1;
1504 
1505 		msg.msg_type = macsec_cfg_msg;
1506 		msg.cfg = cfg;
1507 
1508 		ret = nic->aq_fw_ops->send_macsec_req(hw, &msg, &resp);
1509 		if (ret)
1510 			goto unlock;
1511 	}
1512 
1513 	/* Init Ethertype bypass filters */
1514 	for (index = 0; index < ARRAY_SIZE(ctl_ether_types); index++) {
1515 		struct aq_mss_ingress_prectlf_record rx_prectlf_rec;
1516 		struct aq_mss_egress_ctlf_record tx_ctlf_rec;
1517 
1518 		if (ctl_ether_types[index] == 0)
1519 			continue;
1520 
1521 		memset(&tx_ctlf_rec, 0, sizeof(tx_ctlf_rec));
1522 		tx_ctlf_rec.eth_type = ctl_ether_types[index];
1523 		tx_ctlf_rec.match_type = 4; /* Match eth_type only */
1524 		tx_ctlf_rec.match_mask = 0xf; /* match for eth_type */
1525 		tx_ctlf_rec.action = 0; /* Bypass MACSEC modules */
1526 		tbl_idx = NUMROWS_EGRESSCTLFRECORD - num_ctl_ether_types - 1;
1527 		aq_mss_set_egress_ctlf_record(hw, &tx_ctlf_rec, tbl_idx);
1528 
1529 		memset(&rx_prectlf_rec, 0, sizeof(rx_prectlf_rec));
1530 		rx_prectlf_rec.eth_type = ctl_ether_types[index];
1531 		rx_prectlf_rec.match_type = 4; /* Match eth_type only */
1532 		rx_prectlf_rec.match_mask = 0xf; /* match for eth_type */
1533 		rx_prectlf_rec.action = 0; /* Bypass MACSEC modules */
1534 		tbl_idx =
1535 			NUMROWS_INGRESSPRECTLFRECORD - num_ctl_ether_types - 1;
1536 		aq_mss_set_ingress_prectlf_record(hw, &rx_prectlf_rec, tbl_idx);
1537 
1538 		num_ctl_ether_types++;
1539 	}
1540 
1541 	ret = aq_apply_macsec_cfg(nic);
1542 
1543 unlock:
1544 	mutex_unlock(&nic->macsec_mutex);
1545 	return ret;
1546 }
1547 
aq_macsec_work(struct aq_nic_s * nic)1548 void aq_macsec_work(struct aq_nic_s *nic)
1549 {
1550 	if (!nic->macsec_cfg)
1551 		return;
1552 
1553 	if (!netif_carrier_ok(nic->ndev))
1554 		return;
1555 
1556 	mutex_lock(&nic->macsec_mutex);
1557 	aq_check_txsa_expiration(nic);
1558 	mutex_unlock(&nic->macsec_mutex);
1559 }
1560 
aq_macsec_rx_sa_cnt(struct aq_nic_s * nic)1561 int aq_macsec_rx_sa_cnt(struct aq_nic_s *nic)
1562 {
1563 	struct aq_macsec_cfg *cfg = nic->macsec_cfg;
1564 	int i, cnt = 0;
1565 
1566 	if (!cfg)
1567 		return 0;
1568 
1569 	mutex_lock(&nic->macsec_mutex);
1570 
1571 	for (i = 0; i < AQ_MACSEC_MAX_SC; i++) {
1572 		if (!test_bit(i, &cfg->rxsc_idx_busy))
1573 			continue;
1574 		cnt += hweight_long(cfg->aq_rxsc[i].rx_sa_idx_busy);
1575 	}
1576 
1577 	mutex_unlock(&nic->macsec_mutex);
1578 	return cnt;
1579 }
1580 
aq_macsec_tx_sc_cnt(struct aq_nic_s * nic)1581 int aq_macsec_tx_sc_cnt(struct aq_nic_s *nic)
1582 {
1583 	int cnt;
1584 
1585 	if (!nic->macsec_cfg)
1586 		return 0;
1587 
1588 	mutex_lock(&nic->macsec_mutex);
1589 	cnt = hweight_long(nic->macsec_cfg->txsc_idx_busy);
1590 	mutex_unlock(&nic->macsec_mutex);
1591 
1592 	return cnt;
1593 }
1594 
aq_macsec_tx_sa_cnt(struct aq_nic_s * nic)1595 int aq_macsec_tx_sa_cnt(struct aq_nic_s *nic)
1596 {
1597 	struct aq_macsec_cfg *cfg = nic->macsec_cfg;
1598 	int i, cnt = 0;
1599 
1600 	if (!cfg)
1601 		return 0;
1602 
1603 	mutex_lock(&nic->macsec_mutex);
1604 
1605 	for (i = 0; i < AQ_MACSEC_MAX_SC; i++) {
1606 		if (!test_bit(i, &cfg->txsc_idx_busy))
1607 			continue;
1608 		cnt += hweight_long(cfg->aq_txsc[i].tx_sa_idx_busy);
1609 	}
1610 
1611 	mutex_unlock(&nic->macsec_mutex);
1612 	return cnt;
1613 }
1614 
aq_macsec_update_stats(struct aq_nic_s * nic)1615 static int aq_macsec_update_stats(struct aq_nic_s *nic)
1616 {
1617 	struct aq_macsec_cfg *cfg = nic->macsec_cfg;
1618 	struct aq_hw_s *hw = nic->aq_hw;
1619 	struct aq_macsec_txsc *aq_txsc;
1620 	struct aq_macsec_rxsc *aq_rxsc;
1621 	int i, sa_idx, assoc_num;
1622 	int ret = 0;
1623 
1624 	aq_get_macsec_common_stats(hw, &cfg->stats);
1625 
1626 	for (i = 0; i < AQ_MACSEC_MAX_SC; i++) {
1627 		if (!(cfg->txsc_idx_busy & BIT(i)))
1628 			continue;
1629 		aq_txsc = &cfg->aq_txsc[i];
1630 
1631 		ret = aq_get_txsc_stats(hw, aq_txsc->hw_sc_idx,
1632 					&aq_txsc->stats);
1633 		if (ret)
1634 			return ret;
1635 
1636 		for (assoc_num = 0; assoc_num < MACSEC_NUM_AN; assoc_num++) {
1637 			if (!test_bit(assoc_num, &aq_txsc->tx_sa_idx_busy))
1638 				continue;
1639 			sa_idx = aq_txsc->hw_sc_idx | assoc_num;
1640 			ret = aq_get_txsa_stats(hw, sa_idx,
1641 					      &aq_txsc->tx_sa_stats[assoc_num]);
1642 			if (ret)
1643 				return ret;
1644 		}
1645 	}
1646 
1647 	for (i = 0; i < AQ_MACSEC_MAX_SC; i++) {
1648 		if (!(test_bit(i, &cfg->rxsc_idx_busy)))
1649 			continue;
1650 		aq_rxsc = &cfg->aq_rxsc[i];
1651 
1652 		for (assoc_num = 0; assoc_num < MACSEC_NUM_AN; assoc_num++) {
1653 			if (!test_bit(assoc_num, &aq_rxsc->rx_sa_idx_busy))
1654 				continue;
1655 			sa_idx = aq_rxsc->hw_sc_idx | assoc_num;
1656 
1657 			ret = aq_get_rxsa_stats(hw, sa_idx,
1658 					      &aq_rxsc->rx_sa_stats[assoc_num]);
1659 			if (ret)
1660 				return ret;
1661 		}
1662 	}
1663 
1664 	return ret;
1665 }
1666 
aq_macsec_get_stats(struct aq_nic_s * nic,u64 * data)1667 u64 *aq_macsec_get_stats(struct aq_nic_s *nic, u64 *data)
1668 {
1669 	struct aq_macsec_cfg *cfg = nic->macsec_cfg;
1670 	struct aq_macsec_common_stats *common_stats;
1671 	struct aq_macsec_tx_sc_stats *txsc_stats;
1672 	struct aq_macsec_tx_sa_stats *txsa_stats;
1673 	struct aq_macsec_rx_sa_stats *rxsa_stats;
1674 	struct aq_macsec_txsc *aq_txsc;
1675 	struct aq_macsec_rxsc *aq_rxsc;
1676 	unsigned int assoc_num;
1677 	unsigned int sc_num;
1678 	unsigned int i = 0U;
1679 
1680 	if (!cfg)
1681 		return data;
1682 
1683 	mutex_lock(&nic->macsec_mutex);
1684 
1685 	aq_macsec_update_stats(nic);
1686 
1687 	common_stats = &cfg->stats;
1688 	data[i] = common_stats->in.ctl_pkts;
1689 	data[++i] = common_stats->in.tagged_miss_pkts;
1690 	data[++i] = common_stats->in.untagged_miss_pkts;
1691 	data[++i] = common_stats->in.notag_pkts;
1692 	data[++i] = common_stats->in.untagged_pkts;
1693 	data[++i] = common_stats->in.bad_tag_pkts;
1694 	data[++i] = common_stats->in.no_sci_pkts;
1695 	data[++i] = common_stats->in.unknown_sci_pkts;
1696 	data[++i] = common_stats->in.ctrl_prt_pass_pkts;
1697 	data[++i] = common_stats->in.unctrl_prt_pass_pkts;
1698 	data[++i] = common_stats->in.ctrl_prt_fail_pkts;
1699 	data[++i] = common_stats->in.unctrl_prt_fail_pkts;
1700 	data[++i] = common_stats->in.too_long_pkts;
1701 	data[++i] = common_stats->in.igpoc_ctl_pkts;
1702 	data[++i] = common_stats->in.ecc_error_pkts;
1703 	data[++i] = common_stats->in.unctrl_hit_drop_redir;
1704 	data[++i] = common_stats->out.ctl_pkts;
1705 	data[++i] = common_stats->out.unknown_sa_pkts;
1706 	data[++i] = common_stats->out.untagged_pkts;
1707 	data[++i] = common_stats->out.too_long;
1708 	data[++i] = common_stats->out.ecc_error_pkts;
1709 	data[++i] = common_stats->out.unctrl_hit_drop_redir;
1710 
1711 	for (sc_num = 0; sc_num < AQ_MACSEC_MAX_SC; sc_num++) {
1712 		if (!(test_bit(sc_num, &cfg->txsc_idx_busy)))
1713 			continue;
1714 
1715 		aq_txsc = &cfg->aq_txsc[sc_num];
1716 		txsc_stats = &aq_txsc->stats;
1717 
1718 		data[++i] = txsc_stats->sc_protected_pkts;
1719 		data[++i] = txsc_stats->sc_encrypted_pkts;
1720 		data[++i] = txsc_stats->sc_protected_octets;
1721 		data[++i] = txsc_stats->sc_encrypted_octets;
1722 
1723 		for (assoc_num = 0; assoc_num < MACSEC_NUM_AN; assoc_num++) {
1724 			if (!test_bit(assoc_num, &aq_txsc->tx_sa_idx_busy))
1725 				continue;
1726 
1727 			txsa_stats = &aq_txsc->tx_sa_stats[assoc_num];
1728 
1729 			data[++i] = txsa_stats->sa_hit_drop_redirect;
1730 			data[++i] = txsa_stats->sa_protected2_pkts;
1731 			data[++i] = txsa_stats->sa_protected_pkts;
1732 			data[++i] = txsa_stats->sa_encrypted_pkts;
1733 		}
1734 	}
1735 
1736 	for (sc_num = 0; sc_num < AQ_MACSEC_MAX_SC; sc_num++) {
1737 		if (!(test_bit(sc_num, &cfg->rxsc_idx_busy)))
1738 			continue;
1739 
1740 		aq_rxsc = &cfg->aq_rxsc[sc_num];
1741 
1742 		for (assoc_num = 0; assoc_num < MACSEC_NUM_AN; assoc_num++) {
1743 			if (!test_bit(assoc_num, &aq_rxsc->rx_sa_idx_busy))
1744 				continue;
1745 
1746 			rxsa_stats = &aq_rxsc->rx_sa_stats[assoc_num];
1747 
1748 			data[++i] = rxsa_stats->untagged_hit_pkts;
1749 			data[++i] = rxsa_stats->ctrl_hit_drop_redir_pkts;
1750 			data[++i] = rxsa_stats->not_using_sa;
1751 			data[++i] = rxsa_stats->unused_sa;
1752 			data[++i] = rxsa_stats->not_valid_pkts;
1753 			data[++i] = rxsa_stats->invalid_pkts;
1754 			data[++i] = rxsa_stats->ok_pkts;
1755 			data[++i] = rxsa_stats->late_pkts;
1756 			data[++i] = rxsa_stats->delayed_pkts;
1757 			data[++i] = rxsa_stats->unchecked_pkts;
1758 			data[++i] = rxsa_stats->validated_octets;
1759 			data[++i] = rxsa_stats->decrypted_octets;
1760 		}
1761 	}
1762 
1763 	i++;
1764 
1765 	data += i;
1766 
1767 	mutex_unlock(&nic->macsec_mutex);
1768 
1769 	return data;
1770 }
1771