1 /* 2 * Copyright (c) 2004-2011 Atheros Communications 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 9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 15 */ 16 17 #include "core.h" 18 #include "hif-ops.h" 19 #include "cfg80211.h" 20 #include "target.h" 21 #include "debug.h" 22 23 struct ath6kl_sta *ath6kl_find_sta(struct ath6kl *ar, u8 *node_addr) 24 { 25 struct ath6kl_sta *conn = NULL; 26 u8 i, max_conn; 27 28 max_conn = (ar->nw_type == AP_NETWORK) ? AP_MAX_NUM_STA : 0; 29 30 for (i = 0; i < max_conn; i++) { 31 if (memcmp(node_addr, ar->sta_list[i].mac, ETH_ALEN) == 0) { 32 conn = &ar->sta_list[i]; 33 break; 34 } 35 } 36 37 return conn; 38 } 39 40 struct ath6kl_sta *ath6kl_find_sta_by_aid(struct ath6kl *ar, u8 aid) 41 { 42 struct ath6kl_sta *conn = NULL; 43 u8 ctr; 44 45 for (ctr = 0; ctr < AP_MAX_NUM_STA; ctr++) { 46 if (ar->sta_list[ctr].aid == aid) { 47 conn = &ar->sta_list[ctr]; 48 break; 49 } 50 } 51 return conn; 52 } 53 54 static void ath6kl_add_new_sta(struct ath6kl *ar, u8 *mac, u16 aid, u8 *wpaie, 55 u8 ielen, u8 keymgmt, u8 ucipher, u8 auth) 56 { 57 struct ath6kl_sta *sta; 58 u8 free_slot; 59 60 free_slot = aid - 1; 61 62 sta = &ar->sta_list[free_slot]; 63 memcpy(sta->mac, mac, ETH_ALEN); 64 if (ielen <= ATH6KL_MAX_IE) 65 memcpy(sta->wpa_ie, wpaie, ielen); 66 sta->aid = aid; 67 sta->keymgmt = keymgmt; 68 sta->ucipher = ucipher; 69 sta->auth = auth; 70 71 ar->sta_list_index = ar->sta_list_index | (1 << free_slot); 72 ar->ap_stats.sta[free_slot].aid = cpu_to_le32(aid); 73 } 74 75 static void ath6kl_sta_cleanup(struct ath6kl *ar, u8 i) 76 { 77 struct ath6kl_sta *sta = &ar->sta_list[i]; 78 79 /* empty the queued pkts in the PS queue if any */ 80 spin_lock_bh(&sta->psq_lock); 81 skb_queue_purge(&sta->psq); 82 spin_unlock_bh(&sta->psq_lock); 83 84 memset(&ar->ap_stats.sta[sta->aid - 1], 0, 85 sizeof(struct wmi_per_sta_stat)); 86 memset(sta->mac, 0, ETH_ALEN); 87 memset(sta->wpa_ie, 0, ATH6KL_MAX_IE); 88 sta->aid = 0; 89 sta->sta_flags = 0; 90 91 ar->sta_list_index = ar->sta_list_index & ~(1 << i); 92 93 } 94 95 static u8 ath6kl_remove_sta(struct ath6kl *ar, u8 *mac, u16 reason) 96 { 97 u8 i, removed = 0; 98 99 if (is_zero_ether_addr(mac)) 100 return removed; 101 102 if (is_broadcast_ether_addr(mac)) { 103 ath6kl_dbg(ATH6KL_DBG_TRC, "deleting all station\n"); 104 105 for (i = 0; i < AP_MAX_NUM_STA; i++) { 106 if (!is_zero_ether_addr(ar->sta_list[i].mac)) { 107 ath6kl_sta_cleanup(ar, i); 108 removed = 1; 109 } 110 } 111 } else { 112 for (i = 0; i < AP_MAX_NUM_STA; i++) { 113 if (memcmp(ar->sta_list[i].mac, mac, ETH_ALEN) == 0) { 114 ath6kl_dbg(ATH6KL_DBG_TRC, 115 "deleting station %pM aid=%d reason=%d\n", 116 mac, ar->sta_list[i].aid, reason); 117 ath6kl_sta_cleanup(ar, i); 118 removed = 1; 119 break; 120 } 121 } 122 } 123 124 return removed; 125 } 126 127 enum htc_endpoint_id ath6kl_ac2_endpoint_id(void *devt, u8 ac) 128 { 129 struct ath6kl *ar = devt; 130 return ar->ac2ep_map[ac]; 131 } 132 133 struct ath6kl_cookie *ath6kl_alloc_cookie(struct ath6kl *ar) 134 { 135 struct ath6kl_cookie *cookie; 136 137 cookie = ar->cookie_list; 138 if (cookie != NULL) { 139 ar->cookie_list = cookie->arc_list_next; 140 ar->cookie_count--; 141 } 142 143 return cookie; 144 } 145 146 void ath6kl_cookie_init(struct ath6kl *ar) 147 { 148 u32 i; 149 150 ar->cookie_list = NULL; 151 ar->cookie_count = 0; 152 153 memset(ar->cookie_mem, 0, sizeof(ar->cookie_mem)); 154 155 for (i = 0; i < MAX_COOKIE_NUM; i++) 156 ath6kl_free_cookie(ar, &ar->cookie_mem[i]); 157 } 158 159 void ath6kl_cookie_cleanup(struct ath6kl *ar) 160 { 161 ar->cookie_list = NULL; 162 ar->cookie_count = 0; 163 } 164 165 void ath6kl_free_cookie(struct ath6kl *ar, struct ath6kl_cookie *cookie) 166 { 167 /* Insert first */ 168 169 if (!ar || !cookie) 170 return; 171 172 cookie->arc_list_next = ar->cookie_list; 173 ar->cookie_list = cookie; 174 ar->cookie_count++; 175 } 176 177 /* set the window address register (using 4-byte register access ). */ 178 static int ath6kl_set_addrwin_reg(struct ath6kl *ar, u32 reg_addr, u32 addr) 179 { 180 int status; 181 u8 addr_val[4]; 182 s32 i; 183 184 /* 185 * Write bytes 1,2,3 of the register to set the upper address bytes, 186 * the LSB is written last to initiate the access cycle 187 */ 188 189 for (i = 1; i <= 3; i++) { 190 /* 191 * Fill the buffer with the address byte value we want to 192 * hit 4 times. 193 */ 194 memset(addr_val, ((u8 *)&addr)[i], 4); 195 196 /* 197 * Hit each byte of the register address with a 4-byte 198 * write operation to the same address, this is a harmless 199 * operation. 200 */ 201 status = hif_read_write_sync(ar, reg_addr + i, addr_val, 202 4, HIF_WR_SYNC_BYTE_FIX); 203 if (status) 204 break; 205 } 206 207 if (status) { 208 ath6kl_err("failed to write initial bytes of 0x%x to window reg: 0x%X\n", 209 addr, reg_addr); 210 return status; 211 } 212 213 /* 214 * Write the address register again, this time write the whole 215 * 4-byte value. The effect here is that the LSB write causes the 216 * cycle to start, the extra 3 byte write to bytes 1,2,3 has no 217 * effect since we are writing the same values again 218 */ 219 status = hif_read_write_sync(ar, reg_addr, (u8 *)(&addr), 220 4, HIF_WR_SYNC_BYTE_INC); 221 222 if (status) { 223 ath6kl_err("failed to write 0x%x to window reg: 0x%X\n", 224 addr, reg_addr); 225 return status; 226 } 227 228 return 0; 229 } 230 231 /* 232 * Read from the ATH6KL through its diagnostic window. No cooperation from 233 * the Target is required for this. 234 */ 235 int ath6kl_read_reg_diag(struct ath6kl *ar, u32 *address, u32 *data) 236 { 237 int status; 238 239 /* set window register to start read cycle */ 240 status = ath6kl_set_addrwin_reg(ar, WINDOW_READ_ADDR_ADDRESS, 241 *address); 242 243 if (status) 244 return status; 245 246 /* read the data */ 247 status = hif_read_write_sync(ar, WINDOW_DATA_ADDRESS, (u8 *)data, 248 sizeof(u32), HIF_RD_SYNC_BYTE_INC); 249 if (status) { 250 ath6kl_err("failed to read from window data addr\n"); 251 return status; 252 } 253 254 return status; 255 } 256 257 258 /* 259 * Write to the ATH6KL through its diagnostic window. No cooperation from 260 * the Target is required for this. 261 */ 262 static int ath6kl_write_reg_diag(struct ath6kl *ar, u32 *address, u32 *data) 263 { 264 int status; 265 266 /* set write data */ 267 status = hif_read_write_sync(ar, WINDOW_DATA_ADDRESS, (u8 *)data, 268 sizeof(u32), HIF_WR_SYNC_BYTE_INC); 269 if (status) { 270 ath6kl_err("failed to write 0x%x to window data addr\n", *data); 271 return status; 272 } 273 274 /* set window register, which starts the write cycle */ 275 return ath6kl_set_addrwin_reg(ar, WINDOW_WRITE_ADDR_ADDRESS, 276 *address); 277 } 278 279 int ath6kl_access_datadiag(struct ath6kl *ar, u32 address, 280 u8 *data, u32 length, bool read) 281 { 282 u32 count; 283 int status = 0; 284 285 for (count = 0; count < length; count += 4, address += 4) { 286 if (read) { 287 status = ath6kl_read_reg_diag(ar, &address, 288 (u32 *) &data[count]); 289 if (status) 290 break; 291 } else { 292 status = ath6kl_write_reg_diag(ar, &address, 293 (u32 *) &data[count]); 294 if (status) 295 break; 296 } 297 } 298 299 return status; 300 } 301 302 /* FIXME: move to a better place, target.h? */ 303 #define AR6003_RESET_CONTROL_ADDRESS 0x00004000 304 #define AR6004_RESET_CONTROL_ADDRESS 0x00004000 305 306 static void ath6kl_reset_device(struct ath6kl *ar, u32 target_type, 307 bool wait_fot_compltn, bool cold_reset) 308 { 309 int status = 0; 310 u32 address; 311 u32 data; 312 313 if (target_type != TARGET_TYPE_AR6003 && 314 target_type != TARGET_TYPE_AR6004) 315 return; 316 317 data = cold_reset ? RESET_CONTROL_COLD_RST : RESET_CONTROL_MBOX_RST; 318 319 switch (target_type) { 320 case TARGET_TYPE_AR6003: 321 address = AR6003_RESET_CONTROL_ADDRESS; 322 break; 323 case TARGET_TYPE_AR6004: 324 address = AR6004_RESET_CONTROL_ADDRESS; 325 break; 326 default: 327 address = AR6003_RESET_CONTROL_ADDRESS; 328 break; 329 } 330 331 status = ath6kl_write_reg_diag(ar, &address, &data); 332 333 if (status) 334 ath6kl_err("failed to reset target\n"); 335 } 336 337 void ath6kl_stop_endpoint(struct net_device *dev, bool keep_profile, 338 bool get_dbglogs) 339 { 340 struct ath6kl *ar = ath6kl_priv(dev); 341 static u8 bcast_mac[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff}; 342 bool discon_issued; 343 344 netif_stop_queue(dev); 345 346 /* disable the target and the interrupts associated with it */ 347 if (test_bit(WMI_READY, &ar->flag)) { 348 discon_issued = (test_bit(CONNECTED, &ar->flag) || 349 test_bit(CONNECT_PEND, &ar->flag)); 350 ath6kl_disconnect(ar); 351 if (!keep_profile) 352 ath6kl_init_profile_info(ar); 353 354 del_timer(&ar->disconnect_timer); 355 356 clear_bit(WMI_READY, &ar->flag); 357 ath6kl_wmi_shutdown(ar->wmi); 358 clear_bit(WMI_ENABLED, &ar->flag); 359 ar->wmi = NULL; 360 361 /* 362 * After wmi_shudown all WMI events will be dropped. We 363 * need to cleanup the buffers allocated in AP mode and 364 * give disconnect notification to stack, which usually 365 * happens in the disconnect_event. Simulate the disconnect 366 * event by calling the function directly. Sometimes 367 * disconnect_event will be received when the debug logs 368 * are collected. 369 */ 370 if (discon_issued) 371 ath6kl_disconnect_event(ar, DISCONNECT_CMD, 372 (ar->nw_type & AP_NETWORK) ? 373 bcast_mac : ar->bssid, 374 0, NULL, 0); 375 376 ar->user_key_ctrl = 0; 377 378 } else { 379 ath6kl_dbg(ATH6KL_DBG_TRC, 380 "%s: wmi is not ready 0x%p 0x%p\n", 381 __func__, ar, ar->wmi); 382 383 /* Shut down WMI if we have started it */ 384 if (test_bit(WMI_ENABLED, &ar->flag)) { 385 ath6kl_dbg(ATH6KL_DBG_TRC, 386 "%s: shut down wmi\n", __func__); 387 ath6kl_wmi_shutdown(ar->wmi); 388 clear_bit(WMI_ENABLED, &ar->flag); 389 ar->wmi = NULL; 390 } 391 } 392 393 if (ar->htc_target) { 394 ath6kl_dbg(ATH6KL_DBG_TRC, "%s: shut down htc\n", __func__); 395 ath6kl_htc_stop(ar->htc_target); 396 } 397 398 /* 399 * Try to reset the device if we can. The driver may have been 400 * configure NOT to reset the target during a debug session. 401 */ 402 ath6kl_dbg(ATH6KL_DBG_TRC, 403 "attempting to reset target on instance destroy\n"); 404 ath6kl_reset_device(ar, ar->target_type, true, true); 405 } 406 407 static void ath6kl_install_static_wep_keys(struct ath6kl *ar) 408 { 409 u8 index; 410 u8 keyusage; 411 412 for (index = WMI_MIN_KEY_INDEX; index <= WMI_MAX_KEY_INDEX; index++) { 413 if (ar->wep_key_list[index].key_len) { 414 keyusage = GROUP_USAGE; 415 if (index == ar->def_txkey_index) 416 keyusage |= TX_USAGE; 417 418 ath6kl_wmi_addkey_cmd(ar->wmi, 419 index, 420 WEP_CRYPT, 421 keyusage, 422 ar->wep_key_list[index].key_len, 423 NULL, 424 ar->wep_key_list[index].key, 425 KEY_OP_INIT_VAL, NULL, 426 NO_SYNC_WMIFLAG); 427 } 428 } 429 } 430 431 static void ath6kl_connect_ap_mode(struct ath6kl *ar, u16 channel, u8 *bssid, 432 u16 listen_int, u16 beacon_int, 433 u8 assoc_req_len, u8 *assoc_info) 434 { 435 struct net_device *dev = ar->net_dev; 436 u8 *ies = NULL, *wpa_ie = NULL, *pos; 437 size_t ies_len = 0; 438 struct station_info sinfo; 439 struct ath6kl_req_key *ik; 440 enum crypto_type keyType = NONE_CRYPT; 441 442 if (memcmp(dev->dev_addr, bssid, ETH_ALEN) == 0) { 443 ik = &ar->ap_mode_bkey; 444 445 switch (ar->auth_mode) { 446 case NONE_AUTH: 447 if (ar->prwise_crypto == WEP_CRYPT) 448 ath6kl_install_static_wep_keys(ar); 449 break; 450 case WPA_PSK_AUTH: 451 case WPA2_PSK_AUTH: 452 case (WPA_PSK_AUTH|WPA2_PSK_AUTH): 453 switch (ik->ik_type) { 454 case ATH6KL_CIPHER_TKIP: 455 keyType = TKIP_CRYPT; 456 break; 457 case ATH6KL_CIPHER_AES_CCM: 458 keyType = AES_CRYPT; 459 break; 460 default: 461 goto skip_key; 462 } 463 ath6kl_wmi_addkey_cmd(ar->wmi, ik->ik_keyix, keyType, 464 GROUP_USAGE, ik->ik_keylen, 465 (u8 *)&ik->ik_keyrsc, 466 ik->ik_keydata, 467 KEY_OP_INIT_VAL, ik->ik_macaddr, 468 SYNC_BOTH_WMIFLAG); 469 break; 470 } 471 skip_key: 472 set_bit(CONNECTED, &ar->flag); 473 return; 474 } 475 476 ath6kl_dbg(ATH6KL_DBG_TRC, "new station %pM aid=%d\n", 477 bssid, channel); 478 479 if (assoc_req_len > sizeof(struct ieee80211_hdr_3addr)) { 480 struct ieee80211_mgmt *mgmt = 481 (struct ieee80211_mgmt *) assoc_info; 482 if (ieee80211_is_assoc_req(mgmt->frame_control) && 483 assoc_req_len >= sizeof(struct ieee80211_hdr_3addr) + 484 sizeof(mgmt->u.assoc_req)) { 485 ies = mgmt->u.assoc_req.variable; 486 ies_len = assoc_info + assoc_req_len - ies; 487 } else if (ieee80211_is_reassoc_req(mgmt->frame_control) && 488 assoc_req_len >= sizeof(struct ieee80211_hdr_3addr) 489 + sizeof(mgmt->u.reassoc_req)) { 490 ies = mgmt->u.reassoc_req.variable; 491 ies_len = assoc_info + assoc_req_len - ies; 492 } 493 } 494 495 pos = ies; 496 while (pos && pos + 1 < ies + ies_len) { 497 if (pos + 2 + pos[1] > ies + ies_len) 498 break; 499 if (pos[0] == WLAN_EID_RSN) 500 wpa_ie = pos; /* RSN IE */ 501 else if (pos[0] == WLAN_EID_VENDOR_SPECIFIC && 502 pos[1] >= 4 && 503 pos[2] == 0x00 && pos[3] == 0x50 && pos[4] == 0xf2) { 504 if (pos[5] == 0x01) 505 wpa_ie = pos; /* WPA IE */ 506 else if (pos[5] == 0x04) { 507 wpa_ie = pos; /* WPS IE */ 508 break; /* overrides WPA/RSN IE */ 509 } 510 } 511 pos += 2 + pos[1]; 512 } 513 514 ath6kl_add_new_sta(ar, bssid, channel, wpa_ie, 515 wpa_ie ? 2 + wpa_ie[1] : 0, 516 listen_int & 0xFF, beacon_int, 517 (listen_int >> 8) & 0xFF); 518 519 /* send event to application */ 520 memset(&sinfo, 0, sizeof(sinfo)); 521 522 /* TODO: sinfo.generation */ 523 524 sinfo.assoc_req_ies = ies; 525 sinfo.assoc_req_ies_len = ies_len; 526 sinfo.filled |= STATION_INFO_ASSOC_REQ_IES; 527 528 cfg80211_new_sta(ar->net_dev, bssid, &sinfo, GFP_KERNEL); 529 530 netif_wake_queue(ar->net_dev); 531 532 return; 533 } 534 535 /* Functions for Tx credit handling */ 536 void ath6k_credit_init(struct htc_credit_state_info *cred_info, 537 struct list_head *ep_list, 538 int tot_credits) 539 { 540 struct htc_endpoint_credit_dist *cur_ep_dist; 541 int count; 542 543 cred_info->cur_free_credits = tot_credits; 544 cred_info->total_avail_credits = tot_credits; 545 546 list_for_each_entry(cur_ep_dist, ep_list, list) { 547 if (cur_ep_dist->endpoint == ENDPOINT_0) 548 continue; 549 550 cur_ep_dist->cred_min = cur_ep_dist->cred_per_msg; 551 552 if (tot_credits > 4) 553 if ((cur_ep_dist->svc_id == WMI_DATA_BK_SVC) || 554 (cur_ep_dist->svc_id == WMI_DATA_BE_SVC)) { 555 ath6kl_deposit_credit_to_ep(cred_info, 556 cur_ep_dist, 557 cur_ep_dist->cred_min); 558 cur_ep_dist->dist_flags |= HTC_EP_ACTIVE; 559 } 560 561 if (cur_ep_dist->svc_id == WMI_CONTROL_SVC) { 562 ath6kl_deposit_credit_to_ep(cred_info, cur_ep_dist, 563 cur_ep_dist->cred_min); 564 /* 565 * Control service is always marked active, it 566 * never goes inactive EVER. 567 */ 568 cur_ep_dist->dist_flags |= HTC_EP_ACTIVE; 569 } else if (cur_ep_dist->svc_id == WMI_DATA_BK_SVC) 570 /* this is the lowest priority data endpoint */ 571 cred_info->lowestpri_ep_dist = cur_ep_dist->list; 572 573 /* 574 * Streams have to be created (explicit | implicit) for all 575 * kinds of traffic. BE endpoints are also inactive in the 576 * beginning. When BE traffic starts it creates implicit 577 * streams that redistributes credits. 578 * 579 * Note: all other endpoints have minimums set but are 580 * initially given NO credits. credits will be distributed 581 * as traffic activity demands 582 */ 583 } 584 585 WARN_ON(cred_info->cur_free_credits <= 0); 586 587 list_for_each_entry(cur_ep_dist, ep_list, list) { 588 if (cur_ep_dist->endpoint == ENDPOINT_0) 589 continue; 590 591 if (cur_ep_dist->svc_id == WMI_CONTROL_SVC) 592 cur_ep_dist->cred_norm = cur_ep_dist->cred_per_msg; 593 else { 594 /* 595 * For the remaining data endpoints, we assume that 596 * each cred_per_msg are the same. We use a simple 597 * calculation here, we take the remaining credits 598 * and determine how many max messages this can 599 * cover and then set each endpoint's normal value 600 * equal to 3/4 this amount. 601 */ 602 count = (cred_info->cur_free_credits / 603 cur_ep_dist->cred_per_msg) 604 * cur_ep_dist->cred_per_msg; 605 count = (count * 3) >> 2; 606 count = max(count, cur_ep_dist->cred_per_msg); 607 cur_ep_dist->cred_norm = count; 608 609 } 610 } 611 } 612 613 /* initialize and setup credit distribution */ 614 int ath6k_setup_credit_dist(void *htc_handle, 615 struct htc_credit_state_info *cred_info) 616 { 617 u16 servicepriority[5]; 618 619 memset(cred_info, 0, sizeof(struct htc_credit_state_info)); 620 621 servicepriority[0] = WMI_CONTROL_SVC; /* highest */ 622 servicepriority[1] = WMI_DATA_VO_SVC; 623 servicepriority[2] = WMI_DATA_VI_SVC; 624 servicepriority[3] = WMI_DATA_BE_SVC; 625 servicepriority[4] = WMI_DATA_BK_SVC; /* lowest */ 626 627 /* set priority list */ 628 ath6kl_htc_set_credit_dist(htc_handle, cred_info, servicepriority, 5); 629 630 return 0; 631 } 632 633 /* reduce an ep's credits back to a set limit */ 634 static void ath6k_reduce_credits(struct htc_credit_state_info *cred_info, 635 struct htc_endpoint_credit_dist *ep_dist, 636 int limit) 637 { 638 int credits; 639 640 ep_dist->cred_assngd = limit; 641 642 if (ep_dist->credits <= limit) 643 return; 644 645 credits = ep_dist->credits - limit; 646 ep_dist->credits -= credits; 647 cred_info->cur_free_credits += credits; 648 } 649 650 static void ath6k_credit_update(struct htc_credit_state_info *cred_info, 651 struct list_head *epdist_list) 652 { 653 struct htc_endpoint_credit_dist *cur_dist_list; 654 655 list_for_each_entry(cur_dist_list, epdist_list, list) { 656 if (cur_dist_list->endpoint == ENDPOINT_0) 657 continue; 658 659 if (cur_dist_list->cred_to_dist > 0) { 660 cur_dist_list->credits += 661 cur_dist_list->cred_to_dist; 662 cur_dist_list->cred_to_dist = 0; 663 if (cur_dist_list->credits > 664 cur_dist_list->cred_assngd) 665 ath6k_reduce_credits(cred_info, 666 cur_dist_list, 667 cur_dist_list->cred_assngd); 668 669 if (cur_dist_list->credits > 670 cur_dist_list->cred_norm) 671 ath6k_reduce_credits(cred_info, cur_dist_list, 672 cur_dist_list->cred_norm); 673 674 if (!(cur_dist_list->dist_flags & HTC_EP_ACTIVE)) { 675 if (cur_dist_list->txq_depth == 0) 676 ath6k_reduce_credits(cred_info, 677 cur_dist_list, 0); 678 } 679 } 680 } 681 } 682 683 /* 684 * HTC has an endpoint that needs credits, ep_dist is the endpoint in 685 * question. 686 */ 687 void ath6k_seek_credits(struct htc_credit_state_info *cred_info, 688 struct htc_endpoint_credit_dist *ep_dist) 689 { 690 struct htc_endpoint_credit_dist *curdist_list; 691 int credits = 0; 692 int need; 693 694 if (ep_dist->svc_id == WMI_CONTROL_SVC) 695 goto out; 696 697 if ((ep_dist->svc_id == WMI_DATA_VI_SVC) || 698 (ep_dist->svc_id == WMI_DATA_VO_SVC)) 699 if ((ep_dist->cred_assngd >= ep_dist->cred_norm)) 700 goto out; 701 702 /* 703 * For all other services, we follow a simple algorithm of: 704 * 705 * 1. checking the free pool for credits 706 * 2. checking lower priority endpoints for credits to take 707 */ 708 709 credits = min(cred_info->cur_free_credits, ep_dist->seek_cred); 710 711 if (credits >= ep_dist->seek_cred) 712 goto out; 713 714 /* 715 * We don't have enough in the free pool, try taking away from 716 * lower priority services The rule for taking away credits: 717 * 718 * 1. Only take from lower priority endpoints 719 * 2. Only take what is allocated above the minimum (never 720 * starve an endpoint completely) 721 * 3. Only take what you need. 722 */ 723 724 list_for_each_entry_reverse(curdist_list, 725 &cred_info->lowestpri_ep_dist, 726 list) { 727 if (curdist_list == ep_dist) 728 break; 729 730 need = ep_dist->seek_cred - cred_info->cur_free_credits; 731 732 if ((curdist_list->cred_assngd - need) >= 733 curdist_list->cred_min) { 734 /* 735 * The current one has been allocated more than 736 * it's minimum and it has enough credits assigned 737 * above it's minimum to fulfill our need try to 738 * take away just enough to fulfill our need. 739 */ 740 ath6k_reduce_credits(cred_info, curdist_list, 741 curdist_list->cred_assngd - need); 742 743 if (cred_info->cur_free_credits >= 744 ep_dist->seek_cred) 745 break; 746 } 747 748 if (curdist_list->endpoint == ENDPOINT_0) 749 break; 750 } 751 752 credits = min(cred_info->cur_free_credits, ep_dist->seek_cred); 753 754 out: 755 /* did we find some credits? */ 756 if (credits) 757 ath6kl_deposit_credit_to_ep(cred_info, ep_dist, credits); 758 759 ep_dist->seek_cred = 0; 760 } 761 762 /* redistribute credits based on activity change */ 763 static void ath6k_redistribute_credits(struct htc_credit_state_info *info, 764 struct list_head *ep_dist_list) 765 { 766 struct htc_endpoint_credit_dist *curdist_list; 767 768 list_for_each_entry(curdist_list, ep_dist_list, list) { 769 if (curdist_list->endpoint == ENDPOINT_0) 770 continue; 771 772 if ((curdist_list->svc_id == WMI_DATA_BK_SVC) || 773 (curdist_list->svc_id == WMI_DATA_BE_SVC)) 774 curdist_list->dist_flags |= HTC_EP_ACTIVE; 775 776 if ((curdist_list->svc_id != WMI_CONTROL_SVC) && 777 !(curdist_list->dist_flags & HTC_EP_ACTIVE)) { 778 if (curdist_list->txq_depth == 0) 779 ath6k_reduce_credits(info, 780 curdist_list, 0); 781 else 782 ath6k_reduce_credits(info, 783 curdist_list, 784 curdist_list->cred_min); 785 } 786 } 787 } 788 789 /* 790 * 791 * This function is invoked whenever endpoints require credit 792 * distributions. A lock is held while this function is invoked, this 793 * function shall NOT block. The ep_dist_list is a list of distribution 794 * structures in prioritized order as defined by the call to the 795 * htc_set_credit_dist() api. 796 */ 797 void ath6k_credit_distribute(struct htc_credit_state_info *cred_info, 798 struct list_head *ep_dist_list, 799 enum htc_credit_dist_reason reason) 800 { 801 switch (reason) { 802 case HTC_CREDIT_DIST_SEND_COMPLETE: 803 ath6k_credit_update(cred_info, ep_dist_list); 804 break; 805 case HTC_CREDIT_DIST_ACTIVITY_CHANGE: 806 ath6k_redistribute_credits(cred_info, ep_dist_list); 807 break; 808 default: 809 break; 810 } 811 812 WARN_ON(cred_info->cur_free_credits > cred_info->total_avail_credits); 813 WARN_ON(cred_info->cur_free_credits < 0); 814 } 815 816 void disconnect_timer_handler(unsigned long ptr) 817 { 818 struct net_device *dev = (struct net_device *)ptr; 819 struct ath6kl *ar = ath6kl_priv(dev); 820 821 ath6kl_init_profile_info(ar); 822 ath6kl_disconnect(ar); 823 } 824 825 void ath6kl_disconnect(struct ath6kl *ar) 826 { 827 if (test_bit(CONNECTED, &ar->flag) || 828 test_bit(CONNECT_PEND, &ar->flag)) { 829 ath6kl_wmi_disconnect_cmd(ar->wmi); 830 /* 831 * Disconnect command is issued, clear the connect pending 832 * flag. The connected flag will be cleared in 833 * disconnect event notification. 834 */ 835 clear_bit(CONNECT_PEND, &ar->flag); 836 } 837 } 838 839 void ath6kl_deep_sleep_enable(struct ath6kl *ar) 840 { 841 switch (ar->sme_state) { 842 case SME_CONNECTING: 843 cfg80211_connect_result(ar->net_dev, ar->bssid, NULL, 0, 844 NULL, 0, 845 WLAN_STATUS_UNSPECIFIED_FAILURE, 846 GFP_KERNEL); 847 break; 848 case SME_CONNECTED: 849 default: 850 /* 851 * FIXME: oddly enough smeState is in DISCONNECTED during 852 * suspend, why? Need to send disconnected event in that 853 * state. 854 */ 855 cfg80211_disconnected(ar->net_dev, 0, NULL, 0, GFP_KERNEL); 856 break; 857 } 858 859 if (test_bit(CONNECTED, &ar->flag) || 860 test_bit(CONNECT_PEND, &ar->flag)) 861 ath6kl_wmi_disconnect_cmd(ar->wmi); 862 863 ar->sme_state = SME_DISCONNECTED; 864 865 /* disable scanning */ 866 if (ath6kl_wmi_scanparams_cmd(ar->wmi, 0xFFFF, 0, 0, 0, 0, 0, 0, 0, 867 0, 0) != 0) 868 printk(KERN_WARNING "ath6kl: failed to disable scan " 869 "during suspend\n"); 870 871 ath6kl_cfg80211_scan_complete_event(ar, -ECANCELED); 872 } 873 874 /* WMI Event handlers */ 875 876 static const char *get_hw_id_string(u32 id) 877 { 878 switch (id) { 879 case AR6003_REV1_VERSION: 880 return "1.0"; 881 case AR6003_REV2_VERSION: 882 return "2.0"; 883 case AR6003_REV3_VERSION: 884 return "2.1.1"; 885 default: 886 return "unknown"; 887 } 888 } 889 890 void ath6kl_ready_event(void *devt, u8 *datap, u32 sw_ver, u32 abi_ver) 891 { 892 struct ath6kl *ar = devt; 893 struct net_device *dev = ar->net_dev; 894 895 memcpy(dev->dev_addr, datap, ETH_ALEN); 896 ath6kl_dbg(ATH6KL_DBG_TRC, "%s: mac addr = %pM\n", 897 __func__, dev->dev_addr); 898 899 ar->version.wlan_ver = sw_ver; 900 ar->version.abi_ver = abi_ver; 901 902 snprintf(ar->wdev->wiphy->fw_version, 903 sizeof(ar->wdev->wiphy->fw_version), 904 "%u.%u.%u.%u", 905 (ar->version.wlan_ver & 0xf0000000) >> 28, 906 (ar->version.wlan_ver & 0x0f000000) >> 24, 907 (ar->version.wlan_ver & 0x00ff0000) >> 16, 908 (ar->version.wlan_ver & 0x0000ffff)); 909 910 /* indicate to the waiting thread that the ready event was received */ 911 set_bit(WMI_READY, &ar->flag); 912 wake_up(&ar->event_wq); 913 914 ath6kl_info("hw %s fw %s\n", 915 get_hw_id_string(ar->wdev->wiphy->hw_version), 916 ar->wdev->wiphy->fw_version); 917 } 918 919 void ath6kl_scan_complete_evt(struct ath6kl *ar, int status) 920 { 921 ath6kl_cfg80211_scan_complete_event(ar, status); 922 923 if (!ar->usr_bss_filter) 924 ath6kl_wmi_bssfilter_cmd(ar->wmi, NONE_BSS_FILTER, 0); 925 926 ath6kl_dbg(ATH6KL_DBG_WLAN_SCAN, "scan complete: %d\n", status); 927 } 928 929 void ath6kl_connect_event(struct ath6kl *ar, u16 channel, u8 *bssid, 930 u16 listen_int, u16 beacon_int, 931 enum network_type net_type, u8 beacon_ie_len, 932 u8 assoc_req_len, u8 assoc_resp_len, 933 u8 *assoc_info) 934 { 935 unsigned long flags; 936 937 if (ar->nw_type == AP_NETWORK) { 938 ath6kl_connect_ap_mode(ar, channel, bssid, listen_int, 939 beacon_int, assoc_req_len, 940 assoc_info + beacon_ie_len); 941 return; 942 } 943 944 ath6kl_cfg80211_connect_event(ar, channel, bssid, 945 listen_int, beacon_int, 946 net_type, beacon_ie_len, 947 assoc_req_len, assoc_resp_len, 948 assoc_info); 949 950 memcpy(ar->bssid, bssid, sizeof(ar->bssid)); 951 ar->bss_ch = channel; 952 953 if ((ar->nw_type == INFRA_NETWORK)) 954 ath6kl_wmi_listeninterval_cmd(ar->wmi, ar->listen_intvl_t, 955 ar->listen_intvl_b); 956 957 netif_wake_queue(ar->net_dev); 958 959 /* Update connect & link status atomically */ 960 spin_lock_irqsave(&ar->lock, flags); 961 set_bit(CONNECTED, &ar->flag); 962 clear_bit(CONNECT_PEND, &ar->flag); 963 netif_carrier_on(ar->net_dev); 964 spin_unlock_irqrestore(&ar->lock, flags); 965 966 aggr_reset_state(ar->aggr_cntxt); 967 ar->reconnect_flag = 0; 968 969 if ((ar->nw_type == ADHOC_NETWORK) && ar->ibss_ps_enable) { 970 memset(ar->node_map, 0, sizeof(ar->node_map)); 971 ar->node_num = 0; 972 ar->next_ep_id = ENDPOINT_2; 973 } 974 975 if (!ar->usr_bss_filter) 976 ath6kl_wmi_bssfilter_cmd(ar->wmi, NONE_BSS_FILTER, 0); 977 } 978 979 void ath6kl_tkip_micerr_event(struct ath6kl *ar, u8 keyid, bool ismcast) 980 { 981 struct ath6kl_sta *sta; 982 u8 tsc[6]; 983 /* 984 * For AP case, keyid will have aid of STA which sent pkt with 985 * MIC error. Use this aid to get MAC & send it to hostapd. 986 */ 987 if (ar->nw_type == AP_NETWORK) { 988 sta = ath6kl_find_sta_by_aid(ar, (keyid >> 2)); 989 if (!sta) 990 return; 991 992 ath6kl_dbg(ATH6KL_DBG_TRC, 993 "ap tkip mic error received from aid=%d\n", keyid); 994 995 memset(tsc, 0, sizeof(tsc)); /* FIX: get correct TSC */ 996 cfg80211_michael_mic_failure(ar->net_dev, sta->mac, 997 NL80211_KEYTYPE_PAIRWISE, keyid, 998 tsc, GFP_KERNEL); 999 } else 1000 ath6kl_cfg80211_tkip_micerr_event(ar, keyid, ismcast); 1001 1002 } 1003 1004 static void ath6kl_update_target_stats(struct ath6kl *ar, u8 *ptr, u32 len) 1005 { 1006 struct wmi_target_stats *tgt_stats = 1007 (struct wmi_target_stats *) ptr; 1008 struct target_stats *stats = &ar->target_stats; 1009 struct tkip_ccmp_stats *ccmp_stats; 1010 struct bss *conn_bss = NULL; 1011 struct cserv_stats *c_stats; 1012 u8 ac; 1013 1014 if (len < sizeof(*tgt_stats)) 1015 return; 1016 1017 /* update the RSSI of the connected bss */ 1018 if (test_bit(CONNECTED, &ar->flag)) { 1019 conn_bss = ath6kl_wmi_find_node(ar->wmi, ar->bssid); 1020 if (conn_bss) { 1021 c_stats = &tgt_stats->cserv_stats; 1022 conn_bss->ni_rssi = 1023 a_sle16_to_cpu(c_stats->cs_ave_beacon_rssi); 1024 conn_bss->ni_snr = 1025 tgt_stats->cserv_stats.cs_ave_beacon_snr; 1026 ath6kl_wmi_node_return(ar->wmi, conn_bss); 1027 } 1028 } 1029 1030 ath6kl_dbg(ATH6KL_DBG_TRC, "updating target stats\n"); 1031 1032 stats->tx_pkt += le32_to_cpu(tgt_stats->stats.tx.pkt); 1033 stats->tx_byte += le32_to_cpu(tgt_stats->stats.tx.byte); 1034 stats->tx_ucast_pkt += le32_to_cpu(tgt_stats->stats.tx.ucast_pkt); 1035 stats->tx_ucast_byte += le32_to_cpu(tgt_stats->stats.tx.ucast_byte); 1036 stats->tx_mcast_pkt += le32_to_cpu(tgt_stats->stats.tx.mcast_pkt); 1037 stats->tx_mcast_byte += le32_to_cpu(tgt_stats->stats.tx.mcast_byte); 1038 stats->tx_bcast_pkt += le32_to_cpu(tgt_stats->stats.tx.bcast_pkt); 1039 stats->tx_bcast_byte += le32_to_cpu(tgt_stats->stats.tx.bcast_byte); 1040 stats->tx_rts_success_cnt += 1041 le32_to_cpu(tgt_stats->stats.tx.rts_success_cnt); 1042 1043 for (ac = 0; ac < WMM_NUM_AC; ac++) 1044 stats->tx_pkt_per_ac[ac] += 1045 le32_to_cpu(tgt_stats->stats.tx.pkt_per_ac[ac]); 1046 1047 stats->tx_err += le32_to_cpu(tgt_stats->stats.tx.err); 1048 stats->tx_fail_cnt += le32_to_cpu(tgt_stats->stats.tx.fail_cnt); 1049 stats->tx_retry_cnt += le32_to_cpu(tgt_stats->stats.tx.retry_cnt); 1050 stats->tx_mult_retry_cnt += 1051 le32_to_cpu(tgt_stats->stats.tx.mult_retry_cnt); 1052 stats->tx_rts_fail_cnt += 1053 le32_to_cpu(tgt_stats->stats.tx.rts_fail_cnt); 1054 stats->tx_ucast_rate = 1055 ath6kl_wmi_get_rate(a_sle32_to_cpu(tgt_stats->stats.tx.ucast_rate)); 1056 1057 stats->rx_pkt += le32_to_cpu(tgt_stats->stats.rx.pkt); 1058 stats->rx_byte += le32_to_cpu(tgt_stats->stats.rx.byte); 1059 stats->rx_ucast_pkt += le32_to_cpu(tgt_stats->stats.rx.ucast_pkt); 1060 stats->rx_ucast_byte += le32_to_cpu(tgt_stats->stats.rx.ucast_byte); 1061 stats->rx_mcast_pkt += le32_to_cpu(tgt_stats->stats.rx.mcast_pkt); 1062 stats->rx_mcast_byte += le32_to_cpu(tgt_stats->stats.rx.mcast_byte); 1063 stats->rx_bcast_pkt += le32_to_cpu(tgt_stats->stats.rx.bcast_pkt); 1064 stats->rx_bcast_byte += le32_to_cpu(tgt_stats->stats.rx.bcast_byte); 1065 stats->rx_frgment_pkt += le32_to_cpu(tgt_stats->stats.rx.frgment_pkt); 1066 stats->rx_err += le32_to_cpu(tgt_stats->stats.rx.err); 1067 stats->rx_crc_err += le32_to_cpu(tgt_stats->stats.rx.crc_err); 1068 stats->rx_key_cache_miss += 1069 le32_to_cpu(tgt_stats->stats.rx.key_cache_miss); 1070 stats->rx_decrypt_err += le32_to_cpu(tgt_stats->stats.rx.decrypt_err); 1071 stats->rx_dupl_frame += le32_to_cpu(tgt_stats->stats.rx.dupl_frame); 1072 stats->rx_ucast_rate = 1073 ath6kl_wmi_get_rate(a_sle32_to_cpu(tgt_stats->stats.rx.ucast_rate)); 1074 1075 ccmp_stats = &tgt_stats->stats.tkip_ccmp_stats; 1076 1077 stats->tkip_local_mic_fail += 1078 le32_to_cpu(ccmp_stats->tkip_local_mic_fail); 1079 stats->tkip_cnter_measures_invoked += 1080 le32_to_cpu(ccmp_stats->tkip_cnter_measures_invoked); 1081 stats->tkip_fmt_err += le32_to_cpu(ccmp_stats->tkip_fmt_err); 1082 1083 stats->ccmp_fmt_err += le32_to_cpu(ccmp_stats->ccmp_fmt_err); 1084 stats->ccmp_replays += le32_to_cpu(ccmp_stats->ccmp_replays); 1085 1086 stats->pwr_save_fail_cnt += 1087 le32_to_cpu(tgt_stats->pm_stats.pwr_save_failure_cnt); 1088 stats->noise_floor_calib = 1089 a_sle32_to_cpu(tgt_stats->noise_floor_calib); 1090 1091 stats->cs_bmiss_cnt += 1092 le32_to_cpu(tgt_stats->cserv_stats.cs_bmiss_cnt); 1093 stats->cs_low_rssi_cnt += 1094 le32_to_cpu(tgt_stats->cserv_stats.cs_low_rssi_cnt); 1095 stats->cs_connect_cnt += 1096 le16_to_cpu(tgt_stats->cserv_stats.cs_connect_cnt); 1097 stats->cs_discon_cnt += 1098 le16_to_cpu(tgt_stats->cserv_stats.cs_discon_cnt); 1099 1100 stats->cs_ave_beacon_rssi = 1101 a_sle16_to_cpu(tgt_stats->cserv_stats.cs_ave_beacon_rssi); 1102 1103 stats->cs_last_roam_msec = 1104 tgt_stats->cserv_stats.cs_last_roam_msec; 1105 stats->cs_snr = tgt_stats->cserv_stats.cs_snr; 1106 stats->cs_rssi = a_sle16_to_cpu(tgt_stats->cserv_stats.cs_rssi); 1107 1108 stats->lq_val = le32_to_cpu(tgt_stats->lq_val); 1109 1110 stats->wow_pkt_dropped += 1111 le32_to_cpu(tgt_stats->wow_stats.wow_pkt_dropped); 1112 stats->wow_host_pkt_wakeups += 1113 tgt_stats->wow_stats.wow_host_pkt_wakeups; 1114 stats->wow_host_evt_wakeups += 1115 tgt_stats->wow_stats.wow_host_evt_wakeups; 1116 stats->wow_evt_discarded += 1117 le16_to_cpu(tgt_stats->wow_stats.wow_evt_discarded); 1118 1119 if (test_bit(STATS_UPDATE_PEND, &ar->flag)) { 1120 clear_bit(STATS_UPDATE_PEND, &ar->flag); 1121 wake_up(&ar->event_wq); 1122 } 1123 } 1124 1125 static void ath6kl_add_le32(__le32 *var, __le32 val) 1126 { 1127 *var = cpu_to_le32(le32_to_cpu(*var) + le32_to_cpu(val)); 1128 } 1129 1130 void ath6kl_tgt_stats_event(struct ath6kl *ar, u8 *ptr, u32 len) 1131 { 1132 struct wmi_ap_mode_stat *p = (struct wmi_ap_mode_stat *) ptr; 1133 struct wmi_ap_mode_stat *ap = &ar->ap_stats; 1134 struct wmi_per_sta_stat *st_ap, *st_p; 1135 u8 ac; 1136 1137 if (ar->nw_type == AP_NETWORK) { 1138 if (len < sizeof(*p)) 1139 return; 1140 1141 for (ac = 0; ac < AP_MAX_NUM_STA; ac++) { 1142 st_ap = &ap->sta[ac]; 1143 st_p = &p->sta[ac]; 1144 1145 ath6kl_add_le32(&st_ap->tx_bytes, st_p->tx_bytes); 1146 ath6kl_add_le32(&st_ap->tx_pkts, st_p->tx_pkts); 1147 ath6kl_add_le32(&st_ap->tx_error, st_p->tx_error); 1148 ath6kl_add_le32(&st_ap->tx_discard, st_p->tx_discard); 1149 ath6kl_add_le32(&st_ap->rx_bytes, st_p->rx_bytes); 1150 ath6kl_add_le32(&st_ap->rx_pkts, st_p->rx_pkts); 1151 ath6kl_add_le32(&st_ap->rx_error, st_p->rx_error); 1152 ath6kl_add_le32(&st_ap->rx_discard, st_p->rx_discard); 1153 } 1154 1155 } else { 1156 ath6kl_update_target_stats(ar, ptr, len); 1157 } 1158 } 1159 1160 void ath6kl_wakeup_event(void *dev) 1161 { 1162 struct ath6kl *ar = (struct ath6kl *) dev; 1163 1164 wake_up(&ar->event_wq); 1165 } 1166 1167 void ath6kl_txpwr_rx_evt(void *devt, u8 tx_pwr) 1168 { 1169 struct ath6kl *ar = (struct ath6kl *) devt; 1170 1171 ar->tx_pwr = tx_pwr; 1172 wake_up(&ar->event_wq); 1173 } 1174 1175 void ath6kl_pspoll_event(struct ath6kl *ar, u8 aid) 1176 { 1177 struct ath6kl_sta *conn; 1178 struct sk_buff *skb; 1179 bool psq_empty = false; 1180 1181 conn = ath6kl_find_sta_by_aid(ar, aid); 1182 1183 if (!conn) 1184 return; 1185 /* 1186 * Send out a packet queued on ps queue. When the ps queue 1187 * becomes empty update the PVB for this station. 1188 */ 1189 spin_lock_bh(&conn->psq_lock); 1190 psq_empty = skb_queue_empty(&conn->psq); 1191 spin_unlock_bh(&conn->psq_lock); 1192 1193 if (psq_empty) 1194 /* TODO: Send out a NULL data frame */ 1195 return; 1196 1197 spin_lock_bh(&conn->psq_lock); 1198 skb = skb_dequeue(&conn->psq); 1199 spin_unlock_bh(&conn->psq_lock); 1200 1201 conn->sta_flags |= STA_PS_POLLED; 1202 ath6kl_data_tx(skb, ar->net_dev); 1203 conn->sta_flags &= ~STA_PS_POLLED; 1204 1205 spin_lock_bh(&conn->psq_lock); 1206 psq_empty = skb_queue_empty(&conn->psq); 1207 spin_unlock_bh(&conn->psq_lock); 1208 1209 if (psq_empty) 1210 ath6kl_wmi_set_pvb_cmd(ar->wmi, conn->aid, 0); 1211 } 1212 1213 void ath6kl_dtimexpiry_event(struct ath6kl *ar) 1214 { 1215 bool mcastq_empty = false; 1216 struct sk_buff *skb; 1217 1218 /* 1219 * If there are no associated STAs, ignore the DTIM expiry event. 1220 * There can be potential race conditions where the last associated 1221 * STA may disconnect & before the host could clear the 'Indicate 1222 * DTIM' request to the firmware, the firmware would have just 1223 * indicated a DTIM expiry event. The race is between 'clear DTIM 1224 * expiry cmd' going from the host to the firmware & the DTIM 1225 * expiry event happening from the firmware to the host. 1226 */ 1227 if (!ar->sta_list_index) 1228 return; 1229 1230 spin_lock_bh(&ar->mcastpsq_lock); 1231 mcastq_empty = skb_queue_empty(&ar->mcastpsq); 1232 spin_unlock_bh(&ar->mcastpsq_lock); 1233 1234 if (mcastq_empty) 1235 return; 1236 1237 /* set the STA flag to dtim_expired for the frame to go out */ 1238 set_bit(DTIM_EXPIRED, &ar->flag); 1239 1240 spin_lock_bh(&ar->mcastpsq_lock); 1241 while ((skb = skb_dequeue(&ar->mcastpsq)) != NULL) { 1242 spin_unlock_bh(&ar->mcastpsq_lock); 1243 1244 ath6kl_data_tx(skb, ar->net_dev); 1245 1246 spin_lock_bh(&ar->mcastpsq_lock); 1247 } 1248 spin_unlock_bh(&ar->mcastpsq_lock); 1249 1250 clear_bit(DTIM_EXPIRED, &ar->flag); 1251 1252 /* clear the LSB of the BitMapCtl field of the TIM IE */ 1253 ath6kl_wmi_set_pvb_cmd(ar->wmi, MCAST_AID, 0); 1254 } 1255 1256 void ath6kl_disconnect_event(struct ath6kl *ar, u8 reason, u8 *bssid, 1257 u8 assoc_resp_len, u8 *assoc_info, 1258 u16 prot_reason_status) 1259 { 1260 struct bss *wmi_ssid_node = NULL; 1261 unsigned long flags; 1262 1263 if (ar->nw_type == AP_NETWORK) { 1264 if (!ath6kl_remove_sta(ar, bssid, prot_reason_status)) 1265 return; 1266 1267 /* if no more associated STAs, empty the mcast PS q */ 1268 if (ar->sta_list_index == 0) { 1269 spin_lock_bh(&ar->mcastpsq_lock); 1270 skb_queue_purge(&ar->mcastpsq); 1271 spin_unlock_bh(&ar->mcastpsq_lock); 1272 1273 /* clear the LSB of the TIM IE's BitMapCtl field */ 1274 if (test_bit(WMI_READY, &ar->flag)) 1275 ath6kl_wmi_set_pvb_cmd(ar->wmi, MCAST_AID, 0); 1276 } 1277 1278 if (!is_broadcast_ether_addr(bssid)) { 1279 /* send event to application */ 1280 cfg80211_del_sta(ar->net_dev, bssid, GFP_KERNEL); 1281 } 1282 1283 clear_bit(CONNECTED, &ar->flag); 1284 return; 1285 } 1286 1287 ath6kl_cfg80211_disconnect_event(ar, reason, bssid, 1288 assoc_resp_len, assoc_info, 1289 prot_reason_status); 1290 1291 aggr_reset_state(ar->aggr_cntxt); 1292 1293 del_timer(&ar->disconnect_timer); 1294 1295 ath6kl_dbg(ATH6KL_DBG_WLAN_CONNECT, 1296 "disconnect reason is %d\n", reason); 1297 1298 /* 1299 * If the event is due to disconnect cmd from the host, only they 1300 * the target would stop trying to connect. Under any other 1301 * condition, target would keep trying to connect. 1302 */ 1303 if (reason == DISCONNECT_CMD) { 1304 if (!ar->usr_bss_filter && test_bit(WMI_READY, &ar->flag)) 1305 ath6kl_wmi_bssfilter_cmd(ar->wmi, NONE_BSS_FILTER, 0); 1306 } else { 1307 set_bit(CONNECT_PEND, &ar->flag); 1308 if (((reason == ASSOC_FAILED) && 1309 (prot_reason_status == 0x11)) || 1310 ((reason == ASSOC_FAILED) && (prot_reason_status == 0x0) 1311 && (ar->reconnect_flag == 1))) { 1312 set_bit(CONNECTED, &ar->flag); 1313 return; 1314 } 1315 } 1316 1317 if ((reason == NO_NETWORK_AVAIL) && test_bit(WMI_READY, &ar->flag)) { 1318 ath6kl_wmi_node_free(ar->wmi, bssid); 1319 1320 /* 1321 * In case any other same SSID nodes are present remove it, 1322 * since those nodes also not available now. 1323 */ 1324 do { 1325 /* 1326 * Find the nodes based on SSID and remove it 1327 * 1328 * Note: This case will not work out for 1329 * Hidden-SSID 1330 */ 1331 wmi_ssid_node = ath6kl_wmi_find_ssid_node(ar->wmi, 1332 ar->ssid, 1333 ar->ssid_len, 1334 false, 1335 true); 1336 1337 if (wmi_ssid_node) 1338 ath6kl_wmi_node_free(ar->wmi, 1339 wmi_ssid_node->ni_macaddr); 1340 1341 } while (wmi_ssid_node); 1342 } 1343 1344 /* update connect & link status atomically */ 1345 spin_lock_irqsave(&ar->lock, flags); 1346 clear_bit(CONNECTED, &ar->flag); 1347 netif_carrier_off(ar->net_dev); 1348 spin_unlock_irqrestore(&ar->lock, flags); 1349 1350 if ((reason != CSERV_DISCONNECT) || (ar->reconnect_flag != 1)) 1351 ar->reconnect_flag = 0; 1352 1353 if (reason != CSERV_DISCONNECT) 1354 ar->user_key_ctrl = 0; 1355 1356 netif_stop_queue(ar->net_dev); 1357 memset(ar->bssid, 0, sizeof(ar->bssid)); 1358 ar->bss_ch = 0; 1359 1360 ath6kl_tx_data_cleanup(ar); 1361 } 1362 1363 static int ath6kl_open(struct net_device *dev) 1364 { 1365 struct ath6kl *ar = ath6kl_priv(dev); 1366 unsigned long flags; 1367 1368 spin_lock_irqsave(&ar->lock, flags); 1369 1370 set_bit(WLAN_ENABLED, &ar->flag); 1371 1372 if (test_bit(CONNECTED, &ar->flag)) { 1373 netif_carrier_on(dev); 1374 netif_wake_queue(dev); 1375 } else 1376 netif_carrier_off(dev); 1377 1378 spin_unlock_irqrestore(&ar->lock, flags); 1379 1380 return 0; 1381 } 1382 1383 static int ath6kl_close(struct net_device *dev) 1384 { 1385 struct ath6kl *ar = ath6kl_priv(dev); 1386 1387 netif_stop_queue(dev); 1388 1389 ath6kl_disconnect(ar); 1390 1391 if (test_bit(WMI_READY, &ar->flag)) { 1392 if (ath6kl_wmi_scanparams_cmd(ar->wmi, 0xFFFF, 0, 0, 0, 0, 0, 0, 1393 0, 0, 0)) 1394 return -EIO; 1395 1396 clear_bit(WLAN_ENABLED, &ar->flag); 1397 } 1398 1399 ath6kl_cfg80211_scan_complete_event(ar, -ECANCELED); 1400 1401 return 0; 1402 } 1403 1404 static struct net_device_stats *ath6kl_get_stats(struct net_device *dev) 1405 { 1406 struct ath6kl *ar = ath6kl_priv(dev); 1407 1408 return &ar->net_stats; 1409 } 1410 1411 static struct net_device_ops ath6kl_netdev_ops = { 1412 .ndo_open = ath6kl_open, 1413 .ndo_stop = ath6kl_close, 1414 .ndo_start_xmit = ath6kl_data_tx, 1415 .ndo_get_stats = ath6kl_get_stats, 1416 }; 1417 1418 void init_netdev(struct net_device *dev) 1419 { 1420 dev->netdev_ops = &ath6kl_netdev_ops; 1421 dev->watchdog_timeo = ATH6KL_TX_TIMEOUT; 1422 1423 dev->needed_headroom = ETH_HLEN; 1424 dev->needed_headroom += sizeof(struct ath6kl_llc_snap_hdr) + 1425 sizeof(struct wmi_data_hdr) + HTC_HDR_LENGTH 1426 + WMI_MAX_TX_META_SZ + ATH6KL_HTC_ALIGN_BYTES; 1427 1428 return; 1429 } 1430