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1bba5b73 BR |
1 | /* |
2 | * Copyright (c) 2009 Atheros Communications Inc. | |
3 | * Copyright (c) 2010 Bruno Randolf <br1@einfach.org> | |
4 | * | |
5 | * Permission to use, copy, modify, and/or distribute this software for any | |
6 | * purpose with or without fee is hereby granted, provided that the above | |
7 | * copyright notice and this permission notice appear in all copies. | |
8 | * | |
9 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES | |
10 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF | |
11 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR | |
12 | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES | |
13 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | |
14 | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF | |
15 | * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | |
16 | */ | |
17 | ||
18 | #include <asm/unaligned.h> | |
19 | #include <net/mac80211.h> | |
20 | ||
21 | #include "ath.h" | |
22 | #include "reg.h" | |
23 | #include "debug.h" | |
24 | ||
25 | #define REG_READ (common->ops->read) | |
26 | #define REG_WRITE(_ah, _reg, _val) (common->ops->write)(_ah, _val, _reg) | |
27 | ||
28 | #define IEEE80211_WEP_NKID 4 /* number of key ids */ | |
29 | ||
30 | /************************/ | |
31 | /* Key Cache Management */ | |
32 | /************************/ | |
33 | ||
34 | bool ath_hw_keyreset(struct ath_common *common, u16 entry) | |
35 | { | |
36 | u32 keyType; | |
37 | void *ah = common->ah; | |
38 | ||
39 | if (entry >= common->keymax) { | |
3800276a | 40 | ath_err(common, "keycache entry %u out of range\n", entry); |
1bba5b73 BR |
41 | return false; |
42 | } | |
43 | ||
44 | keyType = REG_READ(ah, AR_KEYTABLE_TYPE(entry)); | |
45 | ||
46 | REG_WRITE(ah, AR_KEYTABLE_KEY0(entry), 0); | |
47 | REG_WRITE(ah, AR_KEYTABLE_KEY1(entry), 0); | |
48 | REG_WRITE(ah, AR_KEYTABLE_KEY2(entry), 0); | |
49 | REG_WRITE(ah, AR_KEYTABLE_KEY3(entry), 0); | |
50 | REG_WRITE(ah, AR_KEYTABLE_KEY4(entry), 0); | |
51 | REG_WRITE(ah, AR_KEYTABLE_TYPE(entry), AR_KEYTABLE_TYPE_CLR); | |
52 | REG_WRITE(ah, AR_KEYTABLE_MAC0(entry), 0); | |
53 | REG_WRITE(ah, AR_KEYTABLE_MAC1(entry), 0); | |
54 | ||
55 | if (keyType == AR_KEYTABLE_TYPE_TKIP) { | |
56 | u16 micentry = entry + 64; | |
57 | ||
58 | REG_WRITE(ah, AR_KEYTABLE_KEY0(micentry), 0); | |
59 | REG_WRITE(ah, AR_KEYTABLE_KEY1(micentry), 0); | |
60 | REG_WRITE(ah, AR_KEYTABLE_KEY2(micentry), 0); | |
61 | REG_WRITE(ah, AR_KEYTABLE_KEY3(micentry), 0); | |
62 | ||
63 | } | |
64 | ||
65 | return true; | |
66 | } | |
67 | EXPORT_SYMBOL(ath_hw_keyreset); | |
68 | ||
a3685d11 LR |
69 | static bool ath_hw_keysetmac(struct ath_common *common, |
70 | u16 entry, const u8 *mac) | |
1bba5b73 BR |
71 | { |
72 | u32 macHi, macLo; | |
73 | u32 unicast_flag = AR_KEYTABLE_VALID; | |
74 | void *ah = common->ah; | |
75 | ||
76 | if (entry >= common->keymax) { | |
3800276a | 77 | ath_err(common, "keycache entry %u out of range\n", entry); |
1bba5b73 BR |
78 | return false; |
79 | } | |
80 | ||
81 | if (mac != NULL) { | |
82 | /* | |
83 | * AR_KEYTABLE_VALID indicates that the address is a unicast | |
84 | * address, which must match the transmitter address for | |
85 | * decrypting frames. | |
86 | * Not setting this bit allows the hardware to use the key | |
87 | * for multicast frame decryption. | |
88 | */ | |
89 | if (mac[0] & 0x01) | |
90 | unicast_flag = 0; | |
91 | ||
92 | macHi = (mac[5] << 8) | mac[4]; | |
93 | macLo = (mac[3] << 24) | | |
94 | (mac[2] << 16) | | |
95 | (mac[1] << 8) | | |
96 | mac[0]; | |
97 | macLo >>= 1; | |
98 | macLo |= (macHi & 1) << 31; | |
99 | macHi >>= 1; | |
100 | } else { | |
101 | macLo = macHi = 0; | |
102 | } | |
103 | REG_WRITE(ah, AR_KEYTABLE_MAC0(entry), macLo); | |
104 | REG_WRITE(ah, AR_KEYTABLE_MAC1(entry), macHi | unicast_flag); | |
105 | ||
106 | return true; | |
107 | } | |
108 | ||
f8c2a087 LR |
109 | static bool ath_hw_set_keycache_entry(struct ath_common *common, u16 entry, |
110 | const struct ath_keyval *k, | |
111 | const u8 *mac) | |
1bba5b73 BR |
112 | { |
113 | void *ah = common->ah; | |
114 | u32 key0, key1, key2, key3, key4; | |
115 | u32 keyType; | |
116 | ||
117 | if (entry >= common->keymax) { | |
3800276a | 118 | ath_err(common, "keycache entry %u out of range\n", entry); |
1bba5b73 BR |
119 | return false; |
120 | } | |
121 | ||
122 | switch (k->kv_type) { | |
123 | case ATH_CIPHER_AES_OCB: | |
124 | keyType = AR_KEYTABLE_TYPE_AES; | |
125 | break; | |
126 | case ATH_CIPHER_AES_CCM: | |
127 | if (!(common->crypt_caps & ATH_CRYPT_CAP_CIPHER_AESCCM)) { | |
128 | ath_print(common, ATH_DBG_ANY, | |
129 | "AES-CCM not supported by this mac rev\n"); | |
130 | return false; | |
131 | } | |
132 | keyType = AR_KEYTABLE_TYPE_CCM; | |
133 | break; | |
134 | case ATH_CIPHER_TKIP: | |
135 | keyType = AR_KEYTABLE_TYPE_TKIP; | |
136 | if (entry + 64 >= common->keymax) { | |
137 | ath_print(common, ATH_DBG_ANY, | |
138 | "entry %u inappropriate for TKIP\n", entry); | |
139 | return false; | |
140 | } | |
141 | break; | |
142 | case ATH_CIPHER_WEP: | |
143 | if (k->kv_len < WLAN_KEY_LEN_WEP40) { | |
144 | ath_print(common, ATH_DBG_ANY, | |
145 | "WEP key length %u too small\n", k->kv_len); | |
146 | return false; | |
147 | } | |
148 | if (k->kv_len <= WLAN_KEY_LEN_WEP40) | |
149 | keyType = AR_KEYTABLE_TYPE_40; | |
150 | else if (k->kv_len <= WLAN_KEY_LEN_WEP104) | |
151 | keyType = AR_KEYTABLE_TYPE_104; | |
152 | else | |
153 | keyType = AR_KEYTABLE_TYPE_128; | |
154 | break; | |
155 | case ATH_CIPHER_CLR: | |
156 | keyType = AR_KEYTABLE_TYPE_CLR; | |
157 | break; | |
158 | default: | |
3800276a | 159 | ath_err(common, "cipher %u not supported\n", k->kv_type); |
1bba5b73 BR |
160 | return false; |
161 | } | |
162 | ||
163 | key0 = get_unaligned_le32(k->kv_val + 0); | |
164 | key1 = get_unaligned_le16(k->kv_val + 4); | |
165 | key2 = get_unaligned_le32(k->kv_val + 6); | |
166 | key3 = get_unaligned_le16(k->kv_val + 10); | |
167 | key4 = get_unaligned_le32(k->kv_val + 12); | |
168 | if (k->kv_len <= WLAN_KEY_LEN_WEP104) | |
169 | key4 &= 0xff; | |
170 | ||
171 | /* | |
172 | * Note: Key cache registers access special memory area that requires | |
173 | * two 32-bit writes to actually update the values in the internal | |
174 | * memory. Consequently, the exact order and pairs used here must be | |
175 | * maintained. | |
176 | */ | |
177 | ||
178 | if (keyType == AR_KEYTABLE_TYPE_TKIP) { | |
179 | u16 micentry = entry + 64; | |
180 | ||
181 | /* | |
182 | * Write inverted key[47:0] first to avoid Michael MIC errors | |
183 | * on frames that could be sent or received at the same time. | |
184 | * The correct key will be written in the end once everything | |
185 | * else is ready. | |
186 | */ | |
187 | REG_WRITE(ah, AR_KEYTABLE_KEY0(entry), ~key0); | |
188 | REG_WRITE(ah, AR_KEYTABLE_KEY1(entry), ~key1); | |
189 | ||
190 | /* Write key[95:48] */ | |
191 | REG_WRITE(ah, AR_KEYTABLE_KEY2(entry), key2); | |
192 | REG_WRITE(ah, AR_KEYTABLE_KEY3(entry), key3); | |
193 | ||
194 | /* Write key[127:96] and key type */ | |
195 | REG_WRITE(ah, AR_KEYTABLE_KEY4(entry), key4); | |
196 | REG_WRITE(ah, AR_KEYTABLE_TYPE(entry), keyType); | |
197 | ||
198 | /* Write MAC address for the entry */ | |
199 | (void) ath_hw_keysetmac(common, entry, mac); | |
200 | ||
117675d0 | 201 | if (common->crypt_caps & ATH_CRYPT_CAP_MIC_COMBINED) { |
1bba5b73 BR |
202 | /* |
203 | * TKIP uses two key cache entries: | |
204 | * Michael MIC TX/RX keys in the same key cache entry | |
205 | * (idx = main index + 64): | |
206 | * key0 [31:0] = RX key [31:0] | |
207 | * key1 [15:0] = TX key [31:16] | |
208 | * key1 [31:16] = reserved | |
209 | * key2 [31:0] = RX key [63:32] | |
210 | * key3 [15:0] = TX key [15:0] | |
211 | * key3 [31:16] = reserved | |
212 | * key4 [31:0] = TX key [63:32] | |
213 | */ | |
214 | u32 mic0, mic1, mic2, mic3, mic4; | |
215 | ||
216 | mic0 = get_unaligned_le32(k->kv_mic + 0); | |
217 | mic2 = get_unaligned_le32(k->kv_mic + 4); | |
218 | mic1 = get_unaligned_le16(k->kv_txmic + 2) & 0xffff; | |
219 | mic3 = get_unaligned_le16(k->kv_txmic + 0) & 0xffff; | |
220 | mic4 = get_unaligned_le32(k->kv_txmic + 4); | |
221 | ||
222 | /* Write RX[31:0] and TX[31:16] */ | |
223 | REG_WRITE(ah, AR_KEYTABLE_KEY0(micentry), mic0); | |
224 | REG_WRITE(ah, AR_KEYTABLE_KEY1(micentry), mic1); | |
225 | ||
226 | /* Write RX[63:32] and TX[15:0] */ | |
227 | REG_WRITE(ah, AR_KEYTABLE_KEY2(micentry), mic2); | |
228 | REG_WRITE(ah, AR_KEYTABLE_KEY3(micentry), mic3); | |
229 | ||
230 | /* Write TX[63:32] and keyType(reserved) */ | |
231 | REG_WRITE(ah, AR_KEYTABLE_KEY4(micentry), mic4); | |
232 | REG_WRITE(ah, AR_KEYTABLE_TYPE(micentry), | |
233 | AR_KEYTABLE_TYPE_CLR); | |
234 | ||
235 | } else { | |
236 | /* | |
237 | * TKIP uses four key cache entries (two for group | |
238 | * keys): | |
239 | * Michael MIC TX/RX keys are in different key cache | |
240 | * entries (idx = main index + 64 for TX and | |
241 | * main index + 32 + 96 for RX): | |
242 | * key0 [31:0] = TX/RX MIC key [31:0] | |
243 | * key1 [31:0] = reserved | |
244 | * key2 [31:0] = TX/RX MIC key [63:32] | |
245 | * key3 [31:0] = reserved | |
246 | * key4 [31:0] = reserved | |
247 | * | |
248 | * Upper layer code will call this function separately | |
249 | * for TX and RX keys when these registers offsets are | |
250 | * used. | |
251 | */ | |
252 | u32 mic0, mic2; | |
253 | ||
254 | mic0 = get_unaligned_le32(k->kv_mic + 0); | |
255 | mic2 = get_unaligned_le32(k->kv_mic + 4); | |
256 | ||
257 | /* Write MIC key[31:0] */ | |
258 | REG_WRITE(ah, AR_KEYTABLE_KEY0(micentry), mic0); | |
259 | REG_WRITE(ah, AR_KEYTABLE_KEY1(micentry), 0); | |
260 | ||
261 | /* Write MIC key[63:32] */ | |
262 | REG_WRITE(ah, AR_KEYTABLE_KEY2(micentry), mic2); | |
263 | REG_WRITE(ah, AR_KEYTABLE_KEY3(micentry), 0); | |
264 | ||
265 | /* Write TX[63:32] and keyType(reserved) */ | |
266 | REG_WRITE(ah, AR_KEYTABLE_KEY4(micentry), 0); | |
267 | REG_WRITE(ah, AR_KEYTABLE_TYPE(micentry), | |
268 | AR_KEYTABLE_TYPE_CLR); | |
269 | } | |
270 | ||
271 | /* MAC address registers are reserved for the MIC entry */ | |
272 | REG_WRITE(ah, AR_KEYTABLE_MAC0(micentry), 0); | |
273 | REG_WRITE(ah, AR_KEYTABLE_MAC1(micentry), 0); | |
274 | ||
275 | /* | |
276 | * Write the correct (un-inverted) key[47:0] last to enable | |
277 | * TKIP now that all other registers are set with correct | |
278 | * values. | |
279 | */ | |
280 | REG_WRITE(ah, AR_KEYTABLE_KEY0(entry), key0); | |
281 | REG_WRITE(ah, AR_KEYTABLE_KEY1(entry), key1); | |
282 | } else { | |
283 | /* Write key[47:0] */ | |
284 | REG_WRITE(ah, AR_KEYTABLE_KEY0(entry), key0); | |
285 | REG_WRITE(ah, AR_KEYTABLE_KEY1(entry), key1); | |
286 | ||
287 | /* Write key[95:48] */ | |
288 | REG_WRITE(ah, AR_KEYTABLE_KEY2(entry), key2); | |
289 | REG_WRITE(ah, AR_KEYTABLE_KEY3(entry), key3); | |
290 | ||
291 | /* Write key[127:96] and key type */ | |
292 | REG_WRITE(ah, AR_KEYTABLE_KEY4(entry), key4); | |
293 | REG_WRITE(ah, AR_KEYTABLE_TYPE(entry), keyType); | |
294 | ||
295 | /* Write MAC address for the entry */ | |
296 | (void) ath_hw_keysetmac(common, entry, mac); | |
297 | } | |
298 | ||
299 | return true; | |
300 | } | |
301 | ||
302 | static int ath_setkey_tkip(struct ath_common *common, u16 keyix, const u8 *key, | |
303 | struct ath_keyval *hk, const u8 *addr, | |
304 | bool authenticator) | |
305 | { | |
306 | const u8 *key_rxmic; | |
307 | const u8 *key_txmic; | |
308 | ||
309 | key_txmic = key + NL80211_TKIP_DATA_OFFSET_TX_MIC_KEY; | |
310 | key_rxmic = key + NL80211_TKIP_DATA_OFFSET_RX_MIC_KEY; | |
311 | ||
312 | if (addr == NULL) { | |
313 | /* | |
314 | * Group key installation - only two key cache entries are used | |
315 | * regardless of splitmic capability since group key is only | |
316 | * used either for TX or RX. | |
317 | */ | |
318 | if (authenticator) { | |
319 | memcpy(hk->kv_mic, key_txmic, sizeof(hk->kv_mic)); | |
320 | memcpy(hk->kv_txmic, key_txmic, sizeof(hk->kv_mic)); | |
321 | } else { | |
322 | memcpy(hk->kv_mic, key_rxmic, sizeof(hk->kv_mic)); | |
323 | memcpy(hk->kv_txmic, key_rxmic, sizeof(hk->kv_mic)); | |
324 | } | |
325 | return ath_hw_set_keycache_entry(common, keyix, hk, addr); | |
326 | } | |
117675d0 | 327 | if (common->crypt_caps & ATH_CRYPT_CAP_MIC_COMBINED) { |
1bba5b73 BR |
328 | /* TX and RX keys share the same key cache entry. */ |
329 | memcpy(hk->kv_mic, key_rxmic, sizeof(hk->kv_mic)); | |
330 | memcpy(hk->kv_txmic, key_txmic, sizeof(hk->kv_txmic)); | |
331 | return ath_hw_set_keycache_entry(common, keyix, hk, addr); | |
332 | } | |
333 | ||
334 | /* Separate key cache entries for TX and RX */ | |
335 | ||
336 | /* TX key goes at first index, RX key at +32. */ | |
337 | memcpy(hk->kv_mic, key_txmic, sizeof(hk->kv_mic)); | |
338 | if (!ath_hw_set_keycache_entry(common, keyix, hk, NULL)) { | |
339 | /* TX MIC entry failed. No need to proceed further */ | |
3800276a | 340 | ath_err(common, "Setting TX MIC Key Failed\n"); |
1bba5b73 BR |
341 | return 0; |
342 | } | |
343 | ||
344 | memcpy(hk->kv_mic, key_rxmic, sizeof(hk->kv_mic)); | |
345 | /* XXX delete tx key on failure? */ | |
346 | return ath_hw_set_keycache_entry(common, keyix + 32, hk, addr); | |
347 | } | |
348 | ||
349 | static int ath_reserve_key_cache_slot_tkip(struct ath_common *common) | |
350 | { | |
351 | int i; | |
352 | ||
353 | for (i = IEEE80211_WEP_NKID; i < common->keymax / 2; i++) { | |
354 | if (test_bit(i, common->keymap) || | |
355 | test_bit(i + 64, common->keymap)) | |
356 | continue; /* At least one part of TKIP key allocated */ | |
117675d0 | 357 | if (!(common->crypt_caps & ATH_CRYPT_CAP_MIC_COMBINED) && |
1bba5b73 BR |
358 | (test_bit(i + 32, common->keymap) || |
359 | test_bit(i + 64 + 32, common->keymap))) | |
360 | continue; /* At least one part of TKIP key allocated */ | |
361 | ||
362 | /* Found a free slot for a TKIP key */ | |
363 | return i; | |
364 | } | |
365 | return -1; | |
366 | } | |
367 | ||
368 | static int ath_reserve_key_cache_slot(struct ath_common *common, | |
369 | u32 cipher) | |
370 | { | |
371 | int i; | |
372 | ||
373 | if (cipher == WLAN_CIPHER_SUITE_TKIP) | |
374 | return ath_reserve_key_cache_slot_tkip(common); | |
375 | ||
376 | /* First, try to find slots that would not be available for TKIP. */ | |
117675d0 | 377 | if (!(common->crypt_caps & ATH_CRYPT_CAP_MIC_COMBINED)) { |
1bba5b73 BR |
378 | for (i = IEEE80211_WEP_NKID; i < common->keymax / 4; i++) { |
379 | if (!test_bit(i, common->keymap) && | |
380 | (test_bit(i + 32, common->keymap) || | |
381 | test_bit(i + 64, common->keymap) || | |
382 | test_bit(i + 64 + 32, common->keymap))) | |
383 | return i; | |
384 | if (!test_bit(i + 32, common->keymap) && | |
385 | (test_bit(i, common->keymap) || | |
386 | test_bit(i + 64, common->keymap) || | |
387 | test_bit(i + 64 + 32, common->keymap))) | |
388 | return i + 32; | |
389 | if (!test_bit(i + 64, common->keymap) && | |
390 | (test_bit(i , common->keymap) || | |
391 | test_bit(i + 32, common->keymap) || | |
392 | test_bit(i + 64 + 32, common->keymap))) | |
393 | return i + 64; | |
394 | if (!test_bit(i + 64 + 32, common->keymap) && | |
395 | (test_bit(i, common->keymap) || | |
396 | test_bit(i + 32, common->keymap) || | |
397 | test_bit(i + 64, common->keymap))) | |
398 | return i + 64 + 32; | |
399 | } | |
400 | } else { | |
401 | for (i = IEEE80211_WEP_NKID; i < common->keymax / 2; i++) { | |
402 | if (!test_bit(i, common->keymap) && | |
403 | test_bit(i + 64, common->keymap)) | |
404 | return i; | |
405 | if (test_bit(i, common->keymap) && | |
406 | !test_bit(i + 64, common->keymap)) | |
407 | return i + 64; | |
408 | } | |
409 | } | |
410 | ||
411 | /* No partially used TKIP slots, pick any available slot */ | |
412 | for (i = IEEE80211_WEP_NKID; i < common->keymax; i++) { | |
413 | /* Do not allow slots that could be needed for TKIP group keys | |
414 | * to be used. This limitation could be removed if we know that | |
415 | * TKIP will not be used. */ | |
416 | if (i >= 64 && i < 64 + IEEE80211_WEP_NKID) | |
417 | continue; | |
117675d0 | 418 | if (!(common->crypt_caps & ATH_CRYPT_CAP_MIC_COMBINED)) { |
1bba5b73 BR |
419 | if (i >= 32 && i < 32 + IEEE80211_WEP_NKID) |
420 | continue; | |
421 | if (i >= 64 + 32 && i < 64 + 32 + IEEE80211_WEP_NKID) | |
422 | continue; | |
423 | } | |
424 | ||
425 | if (!test_bit(i, common->keymap)) | |
426 | return i; /* Found a free slot for a key */ | |
427 | } | |
428 | ||
429 | /* No free slot found */ | |
430 | return -1; | |
431 | } | |
432 | ||
433 | /* | |
434 | * Configure encryption in the HW. | |
435 | */ | |
436 | int ath_key_config(struct ath_common *common, | |
437 | struct ieee80211_vif *vif, | |
438 | struct ieee80211_sta *sta, | |
439 | struct ieee80211_key_conf *key) | |
440 | { | |
441 | struct ath_keyval hk; | |
442 | const u8 *mac = NULL; | |
443 | u8 gmac[ETH_ALEN]; | |
444 | int ret = 0; | |
445 | int idx; | |
446 | ||
447 | memset(&hk, 0, sizeof(hk)); | |
448 | ||
449 | switch (key->cipher) { | |
450 | case WLAN_CIPHER_SUITE_WEP40: | |
451 | case WLAN_CIPHER_SUITE_WEP104: | |
452 | hk.kv_type = ATH_CIPHER_WEP; | |
453 | break; | |
454 | case WLAN_CIPHER_SUITE_TKIP: | |
455 | hk.kv_type = ATH_CIPHER_TKIP; | |
456 | break; | |
457 | case WLAN_CIPHER_SUITE_CCMP: | |
458 | hk.kv_type = ATH_CIPHER_AES_CCM; | |
459 | break; | |
460 | default: | |
461 | return -EOPNOTSUPP; | |
462 | } | |
463 | ||
464 | hk.kv_len = key->keylen; | |
465 | memcpy(hk.kv_val, key->key, key->keylen); | |
466 | ||
467 | if (!(key->flags & IEEE80211_KEY_FLAG_PAIRWISE)) { | |
468 | switch (vif->type) { | |
469 | case NL80211_IFTYPE_AP: | |
470 | memcpy(gmac, vif->addr, ETH_ALEN); | |
471 | gmac[0] |= 0x01; | |
472 | mac = gmac; | |
473 | idx = ath_reserve_key_cache_slot(common, key->cipher); | |
474 | break; | |
475 | case NL80211_IFTYPE_ADHOC: | |
476 | if (!sta) { | |
477 | idx = key->keyidx; | |
478 | break; | |
479 | } | |
480 | memcpy(gmac, sta->addr, ETH_ALEN); | |
481 | gmac[0] |= 0x01; | |
482 | mac = gmac; | |
483 | idx = ath_reserve_key_cache_slot(common, key->cipher); | |
484 | break; | |
485 | default: | |
486 | idx = key->keyidx; | |
487 | break; | |
488 | } | |
489 | } else if (key->keyidx) { | |
490 | if (WARN_ON(!sta)) | |
491 | return -EOPNOTSUPP; | |
492 | mac = sta->addr; | |
493 | ||
494 | if (vif->type != NL80211_IFTYPE_AP) { | |
495 | /* Only keyidx 0 should be used with unicast key, but | |
496 | * allow this for client mode for now. */ | |
497 | idx = key->keyidx; | |
498 | } else | |
499 | return -EIO; | |
500 | } else { | |
501 | if (WARN_ON(!sta)) | |
502 | return -EOPNOTSUPP; | |
503 | mac = sta->addr; | |
504 | ||
505 | idx = ath_reserve_key_cache_slot(common, key->cipher); | |
506 | } | |
507 | ||
508 | if (idx < 0) | |
509 | return -ENOSPC; /* no free key cache entries */ | |
510 | ||
511 | if (key->cipher == WLAN_CIPHER_SUITE_TKIP) | |
512 | ret = ath_setkey_tkip(common, idx, key->key, &hk, mac, | |
513 | vif->type == NL80211_IFTYPE_AP); | |
514 | else | |
515 | ret = ath_hw_set_keycache_entry(common, idx, &hk, mac); | |
516 | ||
517 | if (!ret) | |
518 | return -EIO; | |
519 | ||
520 | set_bit(idx, common->keymap); | |
521 | if (key->cipher == WLAN_CIPHER_SUITE_TKIP) { | |
522 | set_bit(idx + 64, common->keymap); | |
523 | set_bit(idx, common->tkip_keymap); | |
524 | set_bit(idx + 64, common->tkip_keymap); | |
117675d0 | 525 | if (!(common->crypt_caps & ATH_CRYPT_CAP_MIC_COMBINED)) { |
1bba5b73 BR |
526 | set_bit(idx + 32, common->keymap); |
527 | set_bit(idx + 64 + 32, common->keymap); | |
528 | set_bit(idx + 32, common->tkip_keymap); | |
529 | set_bit(idx + 64 + 32, common->tkip_keymap); | |
530 | } | |
531 | } | |
532 | ||
533 | return idx; | |
534 | } | |
535 | EXPORT_SYMBOL(ath_key_config); | |
536 | ||
537 | /* | |
538 | * Delete Key. | |
539 | */ | |
540 | void ath_key_delete(struct ath_common *common, struct ieee80211_key_conf *key) | |
541 | { | |
542 | ath_hw_keyreset(common, key->hw_key_idx); | |
543 | if (key->hw_key_idx < IEEE80211_WEP_NKID) | |
544 | return; | |
545 | ||
546 | clear_bit(key->hw_key_idx, common->keymap); | |
547 | if (key->cipher != WLAN_CIPHER_SUITE_TKIP) | |
548 | return; | |
549 | ||
550 | clear_bit(key->hw_key_idx + 64, common->keymap); | |
551 | ||
552 | clear_bit(key->hw_key_idx, common->tkip_keymap); | |
553 | clear_bit(key->hw_key_idx + 64, common->tkip_keymap); | |
554 | ||
117675d0 | 555 | if (!(common->crypt_caps & ATH_CRYPT_CAP_MIC_COMBINED)) { |
1bba5b73 BR |
556 | ath_hw_keyreset(common, key->hw_key_idx + 32); |
557 | clear_bit(key->hw_key_idx + 32, common->keymap); | |
558 | clear_bit(key->hw_key_idx + 64 + 32, common->keymap); | |
559 | ||
560 | clear_bit(key->hw_key_idx + 32, common->tkip_keymap); | |
561 | clear_bit(key->hw_key_idx + 64 + 32, common->tkip_keymap); | |
562 | } | |
563 | } | |
564 | EXPORT_SYMBOL(ath_key_delete); |