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