Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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sys/contrib/dev/ath/ath_hal/ar9300/ar9300_keycache.c
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1 /* 2 * Copyright (c) 2013 Qualcomm Atheros, Inc. 3 * 4 * Permission to use, copy, modify, and/or distribute this software for any 5 * purpose with or without fee is hereby granted, provided that the above 6 * copyright notice and this permission notice appear in all copies. 7 * 8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH 9 * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY 10 * AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, 11 * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM 12 * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR 13 * OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR 14 * PERFORMANCE OF THIS SOFTWARE. 15 */ 16 17 #include "opt_ah.h" 18 19 #include "ah.h" 20 #include "ah_internal.h" 21 22 #include "ar9300/ar9300.h" 23 #include "ar9300/ar9300reg.h" 24 25 /* 26 * Note: The key cache hardware requires that each double-word 27 * pair be written in even/odd order (since the destination is 28 * a 64-bit register). Don't reorder the writes in this code 29 * w/o considering this! 30 */ 31 #define KEY_XOR 0xaa 32 33 #define IS_MIC_ENABLED(ah) \ 34 (AH9300(ah)->ah_sta_id1_defaults & AR_STA_ID1_CRPT_MIC_ENABLE) 35 36 /* 37 * This isn't the keytable type; this is actually something separate 38 * for the TX descriptor. 39 */ 40 static const int keyType[] = { 41 1, /* HAL_CIPHER_WEP */ 42 0, /* HAL_CIPHER_AES_OCB */ 43 2, /* HAL_CIPHER_AES_CCM */ 44 0, /* HAL_CIPHER_CKIP */ 45 3, /* HAL_CIPHER_TKIP */ 46 0 /* HAL_CIPHER_CLR */ 47 }; 48 49 /* 50 * Return the size of the hardware key cache. 51 */ 52 u_int32_t 53 ar9300_get_key_cache_size(struct ath_hal *ah) 54 { 55 return AH_PRIVATE(ah)->ah_caps.halKeyCacheSize; 56 } 57 58 /* 59 * Return AH_TRUE if the specific key cache entry is valid. 60 */ 61 HAL_BOOL 62 ar9300_is_key_cache_entry_valid(struct ath_hal *ah, u_int16_t entry) 63 { 64 if (entry < AH_PRIVATE(ah)->ah_caps.halKeyCacheSize) { 65 u_int32_t val = OS_REG_READ(ah, AR_KEYTABLE_MAC1(entry)); 66 if (val & AR_KEYTABLE_VALID) { 67 return AH_TRUE; 68 } 69 } 70 return AH_FALSE; 71 } 72 73 /* 74 * Clear the specified key cache entry and any associated MIC entry. 75 */ 76 HAL_BOOL 77 ar9300_reset_key_cache_entry(struct ath_hal *ah, u_int16_t entry) 78 { 79 u_int32_t key_type; 80 struct ath_hal_9300 *ahp = AH9300(ah); 81 82 if (entry >= AH_PRIVATE(ah)->ah_caps.halKeyCacheSize) { 83 HALDEBUG(ah, HAL_DEBUG_KEYCACHE, 84 "%s: entry %u out of range\n", __func__, entry); 85 return AH_FALSE; 86 } 87 88 ahp->ah_keytype[entry] = keyType[HAL_CIPHER_CLR]; 89 90 key_type = OS_REG_READ(ah, AR_KEYTABLE_TYPE(entry)); 91 92 /* XXX why not clear key type/valid bit first? */ 93 OS_REG_WRITE(ah, AR_KEYTABLE_KEY0(entry), 0); 94 OS_REG_WRITE(ah, AR_KEYTABLE_KEY1(entry), 0); 95 OS_REG_WRITE(ah, AR_KEYTABLE_KEY2(entry), 0); 96 OS_REG_WRITE(ah, AR_KEYTABLE_KEY3(entry), 0); 97 OS_REG_WRITE(ah, AR_KEYTABLE_KEY4(entry), 0); 98 OS_REG_WRITE(ah, AR_KEYTABLE_TYPE(entry), AR_KEYTABLE_TYPE_CLR); 99 OS_REG_WRITE(ah, AR_KEYTABLE_MAC0(entry), 0); 100 OS_REG_WRITE(ah, AR_KEYTABLE_MAC1(entry), 0); 101 if (key_type == AR_KEYTABLE_TYPE_TKIP && IS_MIC_ENABLED(ah)) { 102 u_int16_t micentry = entry + 64; /* MIC goes at slot+64 */ 103 104 HALASSERT(micentry < AH_PRIVATE(ah)->ah_caps.halKeyCacheSize); 105 OS_REG_WRITE(ah, AR_KEYTABLE_KEY0(micentry), 0); 106 OS_REG_WRITE(ah, AR_KEYTABLE_KEY1(micentry), 0); 107 OS_REG_WRITE(ah, AR_KEYTABLE_KEY2(micentry), 0); 108 OS_REG_WRITE(ah, AR_KEYTABLE_KEY3(micentry), 0); 109 /* NB: key type and MAC are known to be ok */ 110 } 111 112 if (AH_PRIVATE(ah)->ah_curchan == AH_NULL) { 113 return AH_TRUE; 114 } 115 116 if (ar9300_get_capability(ah, HAL_CAP_BB_RIFS_HANG, 0, AH_NULL) 117 == HAL_OK) { 118 if (key_type == AR_KEYTABLE_TYPE_TKIP || 119 key_type == AR_KEYTABLE_TYPE_40 || 120 key_type == AR_KEYTABLE_TYPE_104 || 121 key_type == AR_KEYTABLE_TYPE_128) { 122 /* SW WAR for Bug 31602 */ 123 if (--ahp->ah_rifs_sec_cnt == 0) { 124 HALDEBUG(ah, HAL_DEBUG_KEYCACHE, 125 "%s: Count = %d, enabling RIFS\n", 126 __func__, ahp->ah_rifs_sec_cnt); 127 ar9300_set_rifs_delay(ah, AH_TRUE); 128 } 129 } 130 } 131 return AH_TRUE; 132 } 133 134 /* 135 * Sets the mac part of the specified key cache entry (and any 136 * associated MIC entry) and mark them valid. 137 */ 138 HAL_BOOL 139 ar9300_set_key_cache_entry_mac( 140 struct ath_hal *ah, 141 u_int16_t entry, 142 const u_int8_t *mac) 143 { 144 u_int32_t mac_hi, mac_lo; 145 u_int32_t unicast_addr = AR_KEYTABLE_VALID; 146 147 if (entry >= AH_PRIVATE(ah)->ah_caps.halKeyCacheSize) { 148 HALDEBUG(ah, HAL_DEBUG_KEYCACHE, 149 "%s: entry %u out of range\n", __func__, entry); 150 return AH_FALSE; 151 } 152 /* 153 * Set MAC address -- shifted right by 1. mac_lo is 154 * the 4 MSBs, and mac_hi is the 2 LSBs. 155 */ 156 if (mac != AH_NULL) { 157 /* 158 * If upper layers have requested mcast MACaddr lookup, then 159 * signify this to the hw by setting the (poorly named) valid_bit 160 * to 0. Yes, really 0. The hardware specs, pcu_registers.txt, is 161 * has incorrectly named valid_bit. It should be called "Unicast". 162 * When the Key Cache entry is to decrypt Unicast frames, this bit 163 * should be '1'; for multicast and broadcast frames, this bit is ''. 164 */ 165 if (mac[0] & 0x01) { 166 unicast_addr = 0; /* Not an unicast address */ 167 } 168 169 mac_hi = (mac[5] << 8) | mac[4]; 170 mac_lo = (mac[3] << 24) | (mac[2] << 16) 171 | (mac[1] << 8) | mac[0]; 172 mac_lo >>= 1; /* Note that the bit 0 is shifted out. This bit is used to 173 * indicate that this is a multicast key cache. */ 174 mac_lo |= (mac_hi & 1) << 31; /* carry */ 175 mac_hi >>= 1; 176 } else { 177 mac_lo = mac_hi = 0; 178 } 179 OS_REG_WRITE(ah, AR_KEYTABLE_MAC0(entry), mac_lo); 180 OS_REG_WRITE(ah, AR_KEYTABLE_MAC1(entry), mac_hi | unicast_addr); 181 return AH_TRUE; 182 } 183 184 /* 185 * Sets the contents of the specified key cache entry 186 * and any associated MIC entry. 187 */ 188 HAL_BOOL 189 ar9300_set_key_cache_entry(struct ath_hal *ah, u_int16_t entry, 190 const HAL_KEYVAL *k, const u_int8_t *mac, 191 int xor_key) 192 { 193 const HAL_CAPABILITIES *p_cap = &AH_PRIVATE(ah)->ah_caps; 194 u_int32_t key0, key1, key2, key3, key4; 195 u_int32_t key_type; 196 u_int32_t xor_mask = xor_key ? 197 (KEY_XOR << 24 | KEY_XOR << 16 | KEY_XOR << 8 | KEY_XOR) : 0; 198 struct ath_hal_9300 *ahp = AH9300(ah); 199 u_int32_t pwrmgt, pwrmgt_mic, uapsd_cfg, psta = 0; 200 int is_proxysta_key = k->kv_type & HAL_KEY_PROXY_STA_MASK; 201 202 203 if (entry >= p_cap->halKeyCacheSize) { 204 HALDEBUG(ah, HAL_DEBUG_KEYCACHE, 205 "%s: entry %u out of range\n", __func__, entry); 206 return AH_FALSE; 207 } 208 HALDEBUG(ah, HAL_DEBUG_KEYCACHE, "%s[%d] mac %s proxy %d\n", 209 __func__, __LINE__, mac ? ath_hal_ether_sprintf(mac) : "null", 210 is_proxysta_key); 211 212 switch (k->kv_type & AH_KEYTYPE_MASK) { 213 case HAL_CIPHER_AES_OCB: 214 key_type = AR_KEYTABLE_TYPE_AES; 215 break; 216 case HAL_CIPHER_AES_CCM: 217 if (!p_cap->halCipherAesCcmSupport) { 218 HALDEBUG(ah, HAL_DEBUG_KEYCACHE, "%s: AES-CCM not supported by " 219 "mac rev 0x%x\n", 220 __func__, AH_PRIVATE(ah)->ah_macRev); 221 return AH_FALSE; 222 } 223 key_type = AR_KEYTABLE_TYPE_CCM; 224 break; 225 case HAL_CIPHER_TKIP: 226 key_type = AR_KEYTABLE_TYPE_TKIP; 227 if (IS_MIC_ENABLED(ah) && entry + 64 >= p_cap->halKeyCacheSize) { 228 HALDEBUG(ah, HAL_DEBUG_KEYCACHE, 229 "%s: entry %u inappropriate for TKIP\n", 230 __func__, entry); 231 return AH_FALSE; 232 } 233 break; 234 case HAL_CIPHER_WEP: 235 if (k->kv_len < 40 / NBBY) { 236 HALDEBUG(ah, HAL_DEBUG_KEYCACHE, "%s: WEP key length %u too small\n", 237 __func__, k->kv_len); 238 return AH_FALSE; 239 } 240 if (k->kv_len <= 40 / NBBY) { 241 key_type = AR_KEYTABLE_TYPE_40; 242 } else if (k->kv_len <= 104 / NBBY) { 243 key_type = AR_KEYTABLE_TYPE_104; 244 } else { 245 key_type = AR_KEYTABLE_TYPE_128; 246 } 247 break; 248 case HAL_CIPHER_CLR: 249 key_type = AR_KEYTABLE_TYPE_CLR; 250 break; 251 default: 252 HALDEBUG(ah, HAL_DEBUG_KEYCACHE, "%s: cipher %u not supported\n", 253 __func__, k->kv_type); 254 return AH_FALSE; 255 } 256 257 key0 = LE_READ_4(k->kv_val + 0) ^ xor_mask; 258 key1 = (LE_READ_2(k->kv_val + 4) ^ xor_mask) & 0xffff; 259 key2 = LE_READ_4(k->kv_val + 6) ^ xor_mask; 260 key3 = (LE_READ_2(k->kv_val + 10) ^ xor_mask) & 0xffff; 261 key4 = LE_READ_4(k->kv_val + 12) ^ xor_mask; 262 if (k->kv_len <= 104 / NBBY) { 263 key4 &= 0xff; 264 } 265 266 /* Extract the UAPSD AC bits and shift it appropriately */ 267 uapsd_cfg = k->kv_apsd; 268 uapsd_cfg = (u_int32_t) SM(uapsd_cfg, AR_KEYTABLE_UAPSD); 269 270 /* Need to preserve the power management bit used by MAC */ 271 pwrmgt = OS_REG_READ(ah, AR_KEYTABLE_TYPE(entry)) & AR_KEYTABLE_PWRMGT; 272 273 if (is_proxysta_key) { 274 u_int8_t bcast_mac[6] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff}; 275 if (!mac || OS_MEMCMP(mac, bcast_mac, 6)) { 276 psta = AR_KEYTABLE_DIR_ACK_BIT; 277 } 278 } 279 /* 280 * Note: key cache hardware requires that each double-word 281 * pair be written in even/odd order (since the destination is 282 * a 64-bit register). Don't reorder these writes w/o 283 * considering this! 284 */ 285 if (key_type == AR_KEYTABLE_TYPE_TKIP && IS_MIC_ENABLED(ah)) { 286 u_int16_t micentry = entry + 64; /* MIC goes at slot+64 */ 287 288 /* Need to preserve the power management bit used by MAC */ 289 pwrmgt_mic = 290 OS_REG_READ(ah, AR_KEYTABLE_TYPE(micentry)) & AR_KEYTABLE_PWRMGT; 291 292 /* 293 * Invalidate the encrypt/decrypt key until the MIC 294 * key is installed so pending rx frames will fail 295 * with decrypt errors rather than a MIC error. 296 */ 297 OS_REG_WRITE(ah, AR_KEYTABLE_KEY0(entry), ~key0); 298 OS_REG_WRITE(ah, AR_KEYTABLE_KEY1(entry), ~key1); 299 OS_REG_WRITE(ah, AR_KEYTABLE_KEY2(entry), key2); 300 OS_REG_WRITE(ah, AR_KEYTABLE_KEY3(entry), key3); 301 OS_REG_WRITE(ah, AR_KEYTABLE_KEY4(entry), key4); 302 OS_REG_WRITE(ah, AR_KEYTABLE_TYPE(entry), 303 key_type | pwrmgt | uapsd_cfg | psta); 304 ar9300_set_key_cache_entry_mac(ah, entry, mac); 305 306 /* 307 * since the AR_MISC_MODE register was written with the contents of 308 * ah_misc_mode (if any) in ar9300_attach, just check ah_misc_mode and 309 * save a pci read per key set. 310 */ 311 if (ahp->ah_misc_mode & AR_PCU_MIC_NEW_LOC_ENA) { 312 u_int32_t mic0, mic1, mic2, mic3, mic4; 313 /* 314 * both RX and TX mic values can be combined into 315 * one cache slot entry. 316 * 8*N + 800 31:0 RX Michael key 0 317 * 8*N + 804 15:0 TX Michael key 0 [31:16] 318 * 8*N + 808 31:0 RX Michael key 1 319 * 8*N + 80C 15:0 TX Michael key 0 [15:0] 320 * 8*N + 810 31:0 TX Michael key 1 321 * 8*N + 814 15:0 reserved 322 * 8*N + 818 31:0 reserved 323 * 8*N + 81C 14:0 reserved 324 * 15 key valid == 0 325 */ 326 /* RX mic */ 327 mic0 = LE_READ_4(k->kv_mic + 0); 328 mic2 = LE_READ_4(k->kv_mic + 4); 329 /* TX mic */ 330 mic1 = LE_READ_2(k->kv_txmic + 2) & 0xffff; 331 mic3 = LE_READ_2(k->kv_txmic + 0) & 0xffff; 332 mic4 = LE_READ_4(k->kv_txmic + 4); 333 OS_REG_WRITE(ah, AR_KEYTABLE_KEY0(micentry), mic0); 334 OS_REG_WRITE(ah, AR_KEYTABLE_KEY1(micentry), mic1); 335 OS_REG_WRITE(ah, AR_KEYTABLE_KEY2(micentry), mic2); 336 OS_REG_WRITE(ah, AR_KEYTABLE_KEY3(micentry), mic3); 337 OS_REG_WRITE(ah, AR_KEYTABLE_KEY4(micentry), mic4); 338 OS_REG_WRITE(ah, AR_KEYTABLE_TYPE(micentry), 339 AR_KEYTABLE_TYPE_CLR | pwrmgt_mic | uapsd_cfg); 340 341 } else { 342 u_int32_t mic0, mic2; 343 344 mic0 = LE_READ_4(k->kv_mic + 0); 345 mic2 = LE_READ_4(k->kv_mic + 4); 346 OS_REG_WRITE(ah, AR_KEYTABLE_KEY0(micentry), mic0); 347 OS_REG_WRITE(ah, AR_KEYTABLE_KEY1(micentry), 0); 348 OS_REG_WRITE(ah, AR_KEYTABLE_KEY2(micentry), mic2); 349 OS_REG_WRITE(ah, AR_KEYTABLE_KEY3(micentry), 0); 350 OS_REG_WRITE(ah, AR_KEYTABLE_KEY4(micentry), 0); 351 OS_REG_WRITE(ah, 352 AR_KEYTABLE_TYPE(micentry | pwrmgt_mic | uapsd_cfg), 353 AR_KEYTABLE_TYPE_CLR); 354 } 355 /* NB: MIC key is not marked valid and has no MAC address */ 356 OS_REG_WRITE(ah, AR_KEYTABLE_MAC0(micentry), 0); 357 OS_REG_WRITE(ah, AR_KEYTABLE_MAC1(micentry), 0); 358 359 /* correct intentionally corrupted key */ 360 OS_REG_WRITE(ah, AR_KEYTABLE_KEY0(entry), key0); 361 OS_REG_WRITE(ah, AR_KEYTABLE_KEY1(entry), key1); 362 } else { 363 OS_REG_WRITE(ah, AR_KEYTABLE_KEY0(entry), key0); 364 OS_REG_WRITE(ah, AR_KEYTABLE_KEY1(entry), key1); 365 OS_REG_WRITE(ah, AR_KEYTABLE_KEY2(entry), key2); 366 OS_REG_WRITE(ah, AR_KEYTABLE_KEY3(entry), key3); 367 OS_REG_WRITE(ah, AR_KEYTABLE_KEY4(entry), key4); 368 OS_REG_WRITE(ah, AR_KEYTABLE_TYPE(entry), 369 key_type | pwrmgt | uapsd_cfg | psta); 370 371 /* 372 ath_hal_printf(ah, "%s[%d] mac %s proxy %d\n", 373 __func__, __LINE__, mac ? ath_hal_ether_sprintf(mac) : "null", 374 is_proxysta_key); 375 */ 376 377 ar9300_set_key_cache_entry_mac(ah, entry, mac); 378 } 379 380 ahp->ah_keytype[entry] = keyType[k->kv_type]; 381 HALDEBUG(ah, HAL_DEBUG_KEYCACHE, "%s: entry=%d, k->kv_type=%d," 382 "keyType=%d\n", __func__, entry, k->kv_type, keyType[k->kv_type]); 383 384 385 if (AH_PRIVATE(ah)->ah_curchan == AH_NULL) { 386 return AH_TRUE; 387 } 388 389 if (ar9300_get_capability(ah, HAL_CAP_BB_RIFS_HANG, 0, AH_NULL) 390 == HAL_OK) { 391 if (key_type == AR_KEYTABLE_TYPE_TKIP || 392 key_type == AR_KEYTABLE_TYPE_40 || 393 key_type == AR_KEYTABLE_TYPE_104 || 394 key_type == AR_KEYTABLE_TYPE_128) { 395 /* SW WAR for Bug 31602 */ 396 ahp->ah_rifs_sec_cnt++; 397 HALDEBUG(ah, HAL_DEBUG_KEYCACHE, 398 "%s: Count = %d, disabling RIFS\n", 399 __func__, ahp->ah_rifs_sec_cnt); 400 ar9300_set_rifs_delay(ah, AH_FALSE); 401 } 402 } 403 HALDEBUG(ah, HAL_DEBUG_KEYCACHE, "%s[%d] mac %s proxy %d\n", 404 __func__, __LINE__, mac ? ath_hal_ether_sprintf(mac) : "null", 405 is_proxysta_key); 406 407 return AH_TRUE; 408 } 409 410 /* 411 * Enable the Keysearch for every subframe of an aggregate 412 */ 413 void 414 ar9300_enable_keysearch_always(struct ath_hal *ah, int enable) 415 { 416 u_int32_t val; 417 418 if (!ah) { 419 return; 420 } 421 val = OS_REG_READ(ah, AR_PCU_MISC); 422 if (enable) { 423 val |= AR_PCU_ALWAYS_PERFORM_KEYSEARCH; 424 } else { 425 val &= ~AR_PCU_ALWAYS_PERFORM_KEYSEARCH; 426 } 427 OS_REG_WRITE(ah, AR_PCU_MISC, val); 428 } 429 void ar9300_dump_keycache(struct ath_hal *ah, int n, u_int32_t *entry) 430 { 431 #define AH_KEY_REG_SIZE 8 432 int i; 433 434 for (i = 0; i < AH_KEY_REG_SIZE; i++) { 435 entry[i] = OS_REG_READ(ah, AR_KEYTABLE_KEY0(n) + i * 4); 436 } 437 #undef AH_KEY_REG_SIZE 438 } 439 440 #if ATH_SUPPORT_KEYPLUMB_WAR 441 /* 442 * Check the contents of the specified key cache entry 443 * and any associated MIC entry. 444 */ 445 HAL_BOOL 446 ar9300_check_key_cache_entry(struct ath_hal *ah, u_int16_t entry, 447 const HAL_KEYVAL *k, int xorKey) 448 { 449 const HAL_CAPABILITIES *pCap = &AH_PRIVATE(ah)->ah_caps; 450 u_int32_t key0, key1, key2, key3, key4; 451 u_int32_t keyType; 452 u_int32_t xorMask = xorKey ? 453 (KEY_XOR << 24 | KEY_XOR << 16 | KEY_XOR << 8 | KEY_XOR) : 0; 454 struct ath_hal_9300 *ahp = AH9300(ah); 455 456 457 if (entry >= pCap->hal_key_cache_size) { 458 HALDEBUG(ah, HAL_DEBUG_KEYCACHE, 459 "%s: entry %u out of range\n", __func__, entry); 460 return AH_FALSE; 461 } 462 switch (k->kv_type) { 463 case HAL_CIPHER_AES_OCB: 464 keyType = AR_KEYTABLE_TYPE_AES; 465 break; 466 case HAL_CIPHER_AES_CCM: 467 if (!pCap->hal_cipher_aes_ccm_support) { 468 HALDEBUG(ah, HAL_DEBUG_KEYCACHE, "%s: AES-CCM not supported by " 469 "mac rev 0x%x\n", 470 __func__, AH_PRIVATE(ah)->ah_macRev); 471 return AH_FALSE; 472 } 473 keyType = AR_KEYTABLE_TYPE_CCM; 474 break; 475 case HAL_CIPHER_TKIP: 476 keyType = AR_KEYTABLE_TYPE_TKIP; 477 if (IS_MIC_ENABLED(ah) && entry + 64 >= pCap->hal_key_cache_size) { 478 HALDEBUG(ah, HAL_DEBUG_KEYCACHE, 479 "%s: entry %u inappropriate for TKIP\n", 480 __func__, entry); 481 return AH_FALSE; 482 } 483 break; 484 case HAL_CIPHER_WEP: 485 if (k->kv_len < 40 / NBBY) { 486 HALDEBUG(ah, HAL_DEBUG_KEYCACHE, "%s: WEP key length %u too small\n", 487 __func__, k->kv_len); 488 return AH_FALSE; 489 } 490 if (k->kv_len <= 40 / NBBY) { 491 keyType = AR_KEYTABLE_TYPE_40; 492 } else if (k->kv_len <= 104 / NBBY) { 493 keyType = AR_KEYTABLE_TYPE_104; 494 } else { 495 keyType = AR_KEYTABLE_TYPE_128; 496 } 497 break; 498 case HAL_CIPHER_CLR: 499 keyType = AR_KEYTABLE_TYPE_CLR; 500 return AH_TRUE; 501 default: 502 HALDEBUG(ah, HAL_DEBUG_KEYCACHE, "%s: cipher %u not supported\n", 503 __func__, k->kv_type); 504 return AH_TRUE; 505 } 506 507 key0 = LE_READ_4(k->kv_val + 0) ^ xorMask; 508 key1 = (LE_READ_2(k->kv_val + 4) ^ xorMask) & 0xffff; 509 key2 = LE_READ_4(k->kv_val + 6) ^ xorMask; 510 key3 = (LE_READ_2(k->kv_val + 10) ^ xorMask) & 0xffff; 511 key4 = LE_READ_4(k->kv_val + 12) ^ xorMask; 512 if (k->kv_len <= 104 / NBBY) { 513 key4 &= 0xff; 514 } 515 516 /* 517 * Note: key cache hardware requires that each double-word 518 * pair be written in even/odd order (since the destination is 519 * a 64-bit register). Don't reorder these writes w/o 520 * considering this! 521 */ 522 if (keyType == AR_KEYTABLE_TYPE_TKIP && IS_MIC_ENABLED(ah)) { 523 u_int16_t micentry = entry + 64; /* MIC goes at slot+64 */ 524 525 526 /* 527 * Invalidate the encrypt/decrypt key until the MIC 528 * key is installed so pending rx frames will fail 529 * with decrypt errors rather than a MIC error. 530 */ 531 if ((OS_REG_READ(ah, AR_KEYTABLE_KEY0(entry)) == key0) && 532 (OS_REG_READ(ah, AR_KEYTABLE_KEY1(entry)) == key1) && 533 (OS_REG_READ(ah, AR_KEYTABLE_KEY2(entry)) == key2) && 534 (OS_REG_READ(ah, AR_KEYTABLE_KEY3(entry)) == key3) && 535 (OS_REG_READ(ah, AR_KEYTABLE_KEY4(entry)) == key4) && 536 ((OS_REG_READ(ah, AR_KEYTABLE_TYPE(entry)) & AR_KEY_TYPE) == (keyType & AR_KEY_TYPE))) 537 { 538 539 /* 540 * since the AR_MISC_MODE register was written with the contents of 541 * ah_miscMode (if any) in ar9300Attach, just check ah_miscMode and 542 * save a pci read per key set. 543 */ 544 if (ahp->ah_misc_mode & AR_PCU_MIC_NEW_LOC_ENA) { 545 u_int32_t mic0,mic1,mic2,mic3,mic4; 546 /* 547 * both RX and TX mic values can be combined into 548 * one cache slot entry. 549 * 8*N + 800 31:0 RX Michael key 0 550 * 8*N + 804 15:0 TX Michael key 0 [31:16] 551 * 8*N + 808 31:0 RX Michael key 1 552 * 8*N + 80C 15:0 TX Michael key 0 [15:0] 553 * 8*N + 810 31:0 TX Michael key 1 554 * 8*N + 814 15:0 reserved 555 * 8*N + 818 31:0 reserved 556 * 8*N + 81C 14:0 reserved 557 * 15 key valid == 0 558 */ 559 /* RX mic */ 560 mic0 = LE_READ_4(k->kv_mic + 0); 561 mic2 = LE_READ_4(k->kv_mic + 4); 562 /* TX mic */ 563 mic1 = LE_READ_2(k->kv_txmic + 2) & 0xffff; 564 mic3 = LE_READ_2(k->kv_txmic + 0) & 0xffff; 565 mic4 = LE_READ_4(k->kv_txmic + 4); 566 if ((OS_REG_READ(ah, AR_KEYTABLE_KEY0(micentry)) == mic0) && 567 (OS_REG_READ(ah, AR_KEYTABLE_KEY1(micentry)) == mic1) && 568 (OS_REG_READ(ah, AR_KEYTABLE_KEY2(micentry)) == mic2) && 569 (OS_REG_READ(ah, AR_KEYTABLE_KEY3(micentry)) == mic3) && 570 (OS_REG_READ(ah, AR_KEYTABLE_KEY4(micentry)) == mic4) && 571 ((OS_REG_READ(ah, AR_KEYTABLE_TYPE(micentry)) & AR_KEY_TYPE) == (AR_KEYTABLE_TYPE_CLR & AR_KEY_TYPE))) { 572 return AH_TRUE; 573 } 574 575 } else { 576 return AH_TRUE; 577 } 578 } 579 } else { 580 if ((OS_REG_READ(ah, AR_KEYTABLE_KEY0(entry)) == key0) && 581 (OS_REG_READ(ah, AR_KEYTABLE_KEY1(entry)) == key1) && 582 (OS_REG_READ(ah, AR_KEYTABLE_KEY2(entry)) == key2) && 583 (OS_REG_READ(ah, AR_KEYTABLE_KEY3(entry)) == key3) && 584 (OS_REG_READ(ah, AR_KEYTABLE_KEY4(entry)) == key4) && 585 ((OS_REG_READ(ah, AR_KEYTABLE_TYPE(entry)) & AR_KEY_TYPE) == (keyType & AR_KEY_TYPE))) { 586 return AH_TRUE; 587 } 588 } 589 return AH_FALSE; 590 } 591 #endif
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