main.c revision addb44be036dd5fc814be770ec4b90f08c820e76
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 23struct 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 40struct 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 54static 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 75static 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 95static 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 127enum 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 133struct 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 146void 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 159void ath6kl_cookie_cleanup(struct ath6kl *ar) 160{ 161 ar->cookie_list = NULL; 162 ar->cookie_count = 0; 163} 164 165void 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 ). */ 178static 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 hardware through its diagnostic window. No cooperation 233 * from the firmware is required for this. 234 */ 235int ath6kl_diag_read32(struct ath6kl *ar, u32 address, u32 *value) 236{ 237 int ret; 238 239 /* set window register to start read cycle */ 240 ret = ath6kl_set_addrwin_reg(ar, WINDOW_READ_ADDR_ADDRESS, address); 241 if (ret) 242 return ret; 243 244 /* read the data */ 245 ret = hif_read_write_sync(ar, WINDOW_DATA_ADDRESS, (u8 *) value, 246 sizeof(*value), HIF_RD_SYNC_BYTE_INC); 247 if (ret) { 248 ath6kl_warn("failed to read32 through diagnose window: %d\n", 249 ret); 250 return ret; 251 } 252 253 return 0; 254} 255 256/* 257 * Write to the ATH6KL through its diagnostic window. No cooperation from 258 * the Target is required for this. 259 */ 260static int ath6kl_diag_write32(struct ath6kl *ar, u32 address, u32 value) 261{ 262 int ret; 263 264 /* set write data */ 265 ret = hif_read_write_sync(ar, WINDOW_DATA_ADDRESS, (u8 *) &value, 266 sizeof(value), HIF_WR_SYNC_BYTE_INC); 267 if (ret) { 268 ath6kl_err("failed to write 0x%x during diagnose window to 0x%d\n", 269 address, value); 270 return ret; 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 278int ath6kl_diag_read(struct ath6kl *ar, u32 address, void *data, u32 length) 279{ 280 u32 count, *buf = data; 281 int ret; 282 283 if (WARN_ON(length % 4)) 284 return -EINVAL; 285 286 for (count = 0; count < length / 4; count++, address += 4) { 287 ret = ath6kl_diag_read32(ar, address, &buf[count]); 288 if (ret) 289 return ret; 290 } 291 292 return 0; 293} 294 295int ath6kl_diag_write(struct ath6kl *ar, u32 address, void *data, u32 length) 296{ 297 u32 count, *buf = data; 298 int ret; 299 300 if (WARN_ON(length % 4)) 301 return -EINVAL; 302 303 for (count = 0; count < length / 4; count++, address += 4) { 304 ret = ath6kl_diag_write32(ar, address, buf[count]); 305 if (ret) 306 return ret; 307 } 308 309 return 0; 310} 311 312/* FIXME: move to a better place, target.h? */ 313#define AR6003_RESET_CONTROL_ADDRESS 0x00004000 314#define AR6004_RESET_CONTROL_ADDRESS 0x00004000 315 316static void ath6kl_reset_device(struct ath6kl *ar, u32 target_type, 317 bool wait_fot_compltn, bool cold_reset) 318{ 319 int status = 0; 320 u32 address; 321 u32 data; 322 323 if (target_type != TARGET_TYPE_AR6003 && 324 target_type != TARGET_TYPE_AR6004) 325 return; 326 327 data = cold_reset ? RESET_CONTROL_COLD_RST : RESET_CONTROL_MBOX_RST; 328 329 switch (target_type) { 330 case TARGET_TYPE_AR6003: 331 address = AR6003_RESET_CONTROL_ADDRESS; 332 break; 333 case TARGET_TYPE_AR6004: 334 address = AR6004_RESET_CONTROL_ADDRESS; 335 break; 336 default: 337 address = AR6003_RESET_CONTROL_ADDRESS; 338 break; 339 } 340 341 status = ath6kl_diag_write32(ar, address, data); 342 343 if (status) 344 ath6kl_err("failed to reset target\n"); 345} 346 347void ath6kl_stop_endpoint(struct net_device *dev, bool keep_profile, 348 bool get_dbglogs) 349{ 350 struct ath6kl *ar = ath6kl_priv(dev); 351 static u8 bcast_mac[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff}; 352 bool discon_issued; 353 354 netif_stop_queue(dev); 355 356 /* disable the target and the interrupts associated with it */ 357 if (test_bit(WMI_READY, &ar->flag)) { 358 discon_issued = (test_bit(CONNECTED, &ar->flag) || 359 test_bit(CONNECT_PEND, &ar->flag)); 360 ath6kl_disconnect(ar); 361 if (!keep_profile) 362 ath6kl_init_profile_info(ar); 363 364 del_timer(&ar->disconnect_timer); 365 366 clear_bit(WMI_READY, &ar->flag); 367 ath6kl_wmi_shutdown(ar->wmi); 368 clear_bit(WMI_ENABLED, &ar->flag); 369 ar->wmi = NULL; 370 371 /* 372 * After wmi_shudown all WMI events will be dropped. We 373 * need to cleanup the buffers allocated in AP mode and 374 * give disconnect notification to stack, which usually 375 * happens in the disconnect_event. Simulate the disconnect 376 * event by calling the function directly. Sometimes 377 * disconnect_event will be received when the debug logs 378 * are collected. 379 */ 380 if (discon_issued) 381 ath6kl_disconnect_event(ar, DISCONNECT_CMD, 382 (ar->nw_type & AP_NETWORK) ? 383 bcast_mac : ar->bssid, 384 0, NULL, 0); 385 386 ar->user_key_ctrl = 0; 387 388 } else { 389 ath6kl_dbg(ATH6KL_DBG_TRC, 390 "%s: wmi is not ready 0x%p 0x%p\n", 391 __func__, ar, ar->wmi); 392 393 /* Shut down WMI if we have started it */ 394 if (test_bit(WMI_ENABLED, &ar->flag)) { 395 ath6kl_dbg(ATH6KL_DBG_TRC, 396 "%s: shut down wmi\n", __func__); 397 ath6kl_wmi_shutdown(ar->wmi); 398 clear_bit(WMI_ENABLED, &ar->flag); 399 ar->wmi = NULL; 400 } 401 } 402 403 if (ar->htc_target) { 404 ath6kl_dbg(ATH6KL_DBG_TRC, "%s: shut down htc\n", __func__); 405 ath6kl_htc_stop(ar->htc_target); 406 } 407 408 /* 409 * Try to reset the device if we can. The driver may have been 410 * configure NOT to reset the target during a debug session. 411 */ 412 ath6kl_dbg(ATH6KL_DBG_TRC, 413 "attempting to reset target on instance destroy\n"); 414 ath6kl_reset_device(ar, ar->target_type, true, true); 415} 416 417static void ath6kl_install_static_wep_keys(struct ath6kl *ar) 418{ 419 u8 index; 420 u8 keyusage; 421 422 for (index = WMI_MIN_KEY_INDEX; index <= WMI_MAX_KEY_INDEX; index++) { 423 if (ar->wep_key_list[index].key_len) { 424 keyusage = GROUP_USAGE; 425 if (index == ar->def_txkey_index) 426 keyusage |= TX_USAGE; 427 428 ath6kl_wmi_addkey_cmd(ar->wmi, 429 index, 430 WEP_CRYPT, 431 keyusage, 432 ar->wep_key_list[index].key_len, 433 NULL, 434 ar->wep_key_list[index].key, 435 KEY_OP_INIT_VAL, NULL, 436 NO_SYNC_WMIFLAG); 437 } 438 } 439} 440 441static void ath6kl_connect_ap_mode(struct ath6kl *ar, u16 channel, u8 *bssid, 442 u16 listen_int, u16 beacon_int, 443 u8 assoc_req_len, u8 *assoc_info) 444{ 445 struct net_device *dev = ar->net_dev; 446 u8 *ies = NULL, *wpa_ie = NULL, *pos; 447 size_t ies_len = 0; 448 struct station_info sinfo; 449 struct ath6kl_req_key *ik; 450 int res; 451 u8 key_rsc[ATH6KL_KEY_SEQ_LEN]; 452 453 if (memcmp(dev->dev_addr, bssid, ETH_ALEN) == 0) { 454 ik = &ar->ap_mode_bkey; 455 456 ath6kl_dbg(ATH6KL_DBG_WLAN_CFG, "AP mode started on %u MHz\n", 457 channel); 458 459 switch (ar->auth_mode) { 460 case NONE_AUTH: 461 if (ar->prwise_crypto == WEP_CRYPT) 462 ath6kl_install_static_wep_keys(ar); 463 break; 464 case WPA_PSK_AUTH: 465 case WPA2_PSK_AUTH: 466 case (WPA_PSK_AUTH|WPA2_PSK_AUTH): 467 if (!ik->valid) 468 break; 469 470 ath6kl_dbg(ATH6KL_DBG_WLAN_CFG, "Delayed addkey for " 471 "the initial group key for AP mode\n"); 472 memset(key_rsc, 0, sizeof(key_rsc)); 473 res = ath6kl_wmi_addkey_cmd( 474 ar->wmi, ik->key_index, ik->key_type, 475 GROUP_USAGE, ik->key_len, key_rsc, ik->key, 476 KEY_OP_INIT_VAL, NULL, SYNC_BOTH_WMIFLAG); 477 if (res) { 478 ath6kl_dbg(ATH6KL_DBG_WLAN_CFG, "Delayed " 479 "addkey failed: %d\n", res); 480 } 481 break; 482 } 483 484 ath6kl_wmi_bssfilter_cmd(ar->wmi, NONE_BSS_FILTER, 0); 485 set_bit(CONNECTED, &ar->flag); 486 netif_carrier_on(ar->net_dev); 487 return; 488 } 489 490 ath6kl_dbg(ATH6KL_DBG_TRC, "new station %pM aid=%d\n", 491 bssid, channel); 492 493 if (assoc_req_len > sizeof(struct ieee80211_hdr_3addr)) { 494 struct ieee80211_mgmt *mgmt = 495 (struct ieee80211_mgmt *) assoc_info; 496 if (ieee80211_is_assoc_req(mgmt->frame_control) && 497 assoc_req_len >= sizeof(struct ieee80211_hdr_3addr) + 498 sizeof(mgmt->u.assoc_req)) { 499 ies = mgmt->u.assoc_req.variable; 500 ies_len = assoc_info + assoc_req_len - ies; 501 } else if (ieee80211_is_reassoc_req(mgmt->frame_control) && 502 assoc_req_len >= sizeof(struct ieee80211_hdr_3addr) 503 + sizeof(mgmt->u.reassoc_req)) { 504 ies = mgmt->u.reassoc_req.variable; 505 ies_len = assoc_info + assoc_req_len - ies; 506 } 507 } 508 509 pos = ies; 510 while (pos && pos + 1 < ies + ies_len) { 511 if (pos + 2 + pos[1] > ies + ies_len) 512 break; 513 if (pos[0] == WLAN_EID_RSN) 514 wpa_ie = pos; /* RSN IE */ 515 else if (pos[0] == WLAN_EID_VENDOR_SPECIFIC && 516 pos[1] >= 4 && 517 pos[2] == 0x00 && pos[3] == 0x50 && pos[4] == 0xf2) { 518 if (pos[5] == 0x01) 519 wpa_ie = pos; /* WPA IE */ 520 else if (pos[5] == 0x04) { 521 wpa_ie = pos; /* WPS IE */ 522 break; /* overrides WPA/RSN IE */ 523 } 524 } 525 pos += 2 + pos[1]; 526 } 527 528 ath6kl_add_new_sta(ar, bssid, channel, wpa_ie, 529 wpa_ie ? 2 + wpa_ie[1] : 0, 530 listen_int & 0xFF, beacon_int, 531 (listen_int >> 8) & 0xFF); 532 533 /* send event to application */ 534 memset(&sinfo, 0, sizeof(sinfo)); 535 536 /* TODO: sinfo.generation */ 537 538 sinfo.assoc_req_ies = ies; 539 sinfo.assoc_req_ies_len = ies_len; 540 sinfo.filled |= STATION_INFO_ASSOC_REQ_IES; 541 542 cfg80211_new_sta(ar->net_dev, bssid, &sinfo, GFP_KERNEL); 543 544 netif_wake_queue(ar->net_dev); 545 546 return; 547} 548 549/* Functions for Tx credit handling */ 550void ath6k_credit_init(struct htc_credit_state_info *cred_info, 551 struct list_head *ep_list, 552 int tot_credits) 553{ 554 struct htc_endpoint_credit_dist *cur_ep_dist; 555 int count; 556 557 cred_info->cur_free_credits = tot_credits; 558 cred_info->total_avail_credits = tot_credits; 559 560 list_for_each_entry(cur_ep_dist, ep_list, list) { 561 if (cur_ep_dist->endpoint == ENDPOINT_0) 562 continue; 563 564 cur_ep_dist->cred_min = cur_ep_dist->cred_per_msg; 565 566 if (tot_credits > 4) 567 if ((cur_ep_dist->svc_id == WMI_DATA_BK_SVC) || 568 (cur_ep_dist->svc_id == WMI_DATA_BE_SVC)) { 569 ath6kl_deposit_credit_to_ep(cred_info, 570 cur_ep_dist, 571 cur_ep_dist->cred_min); 572 cur_ep_dist->dist_flags |= HTC_EP_ACTIVE; 573 } 574 575 if (cur_ep_dist->svc_id == WMI_CONTROL_SVC) { 576 ath6kl_deposit_credit_to_ep(cred_info, cur_ep_dist, 577 cur_ep_dist->cred_min); 578 /* 579 * Control service is always marked active, it 580 * never goes inactive EVER. 581 */ 582 cur_ep_dist->dist_flags |= HTC_EP_ACTIVE; 583 } else if (cur_ep_dist->svc_id == WMI_DATA_BK_SVC) 584 /* this is the lowest priority data endpoint */ 585 cred_info->lowestpri_ep_dist = cur_ep_dist->list; 586 587 /* 588 * Streams have to be created (explicit | implicit) for all 589 * kinds of traffic. BE endpoints are also inactive in the 590 * beginning. When BE traffic starts it creates implicit 591 * streams that redistributes credits. 592 * 593 * Note: all other endpoints have minimums set but are 594 * initially given NO credits. credits will be distributed 595 * as traffic activity demands 596 */ 597 } 598 599 WARN_ON(cred_info->cur_free_credits <= 0); 600 601 list_for_each_entry(cur_ep_dist, ep_list, list) { 602 if (cur_ep_dist->endpoint == ENDPOINT_0) 603 continue; 604 605 if (cur_ep_dist->svc_id == WMI_CONTROL_SVC) 606 cur_ep_dist->cred_norm = cur_ep_dist->cred_per_msg; 607 else { 608 /* 609 * For the remaining data endpoints, we assume that 610 * each cred_per_msg are the same. We use a simple 611 * calculation here, we take the remaining credits 612 * and determine how many max messages this can 613 * cover and then set each endpoint's normal value 614 * equal to 3/4 this amount. 615 */ 616 count = (cred_info->cur_free_credits / 617 cur_ep_dist->cred_per_msg) 618 * cur_ep_dist->cred_per_msg; 619 count = (count * 3) >> 2; 620 count = max(count, cur_ep_dist->cred_per_msg); 621 cur_ep_dist->cred_norm = count; 622 623 } 624 } 625} 626 627/* initialize and setup credit distribution */ 628int ath6k_setup_credit_dist(void *htc_handle, 629 struct htc_credit_state_info *cred_info) 630{ 631 u16 servicepriority[5]; 632 633 memset(cred_info, 0, sizeof(struct htc_credit_state_info)); 634 635 servicepriority[0] = WMI_CONTROL_SVC; /* highest */ 636 servicepriority[1] = WMI_DATA_VO_SVC; 637 servicepriority[2] = WMI_DATA_VI_SVC; 638 servicepriority[3] = WMI_DATA_BE_SVC; 639 servicepriority[4] = WMI_DATA_BK_SVC; /* lowest */ 640 641 /* set priority list */ 642 ath6kl_htc_set_credit_dist(htc_handle, cred_info, servicepriority, 5); 643 644 return 0; 645} 646 647/* reduce an ep's credits back to a set limit */ 648static void ath6k_reduce_credits(struct htc_credit_state_info *cred_info, 649 struct htc_endpoint_credit_dist *ep_dist, 650 int limit) 651{ 652 int credits; 653 654 ep_dist->cred_assngd = limit; 655 656 if (ep_dist->credits <= limit) 657 return; 658 659 credits = ep_dist->credits - limit; 660 ep_dist->credits -= credits; 661 cred_info->cur_free_credits += credits; 662} 663 664static void ath6k_credit_update(struct htc_credit_state_info *cred_info, 665 struct list_head *epdist_list) 666{ 667 struct htc_endpoint_credit_dist *cur_dist_list; 668 669 list_for_each_entry(cur_dist_list, epdist_list, list) { 670 if (cur_dist_list->endpoint == ENDPOINT_0) 671 continue; 672 673 if (cur_dist_list->cred_to_dist > 0) { 674 cur_dist_list->credits += 675 cur_dist_list->cred_to_dist; 676 cur_dist_list->cred_to_dist = 0; 677 if (cur_dist_list->credits > 678 cur_dist_list->cred_assngd) 679 ath6k_reduce_credits(cred_info, 680 cur_dist_list, 681 cur_dist_list->cred_assngd); 682 683 if (cur_dist_list->credits > 684 cur_dist_list->cred_norm) 685 ath6k_reduce_credits(cred_info, cur_dist_list, 686 cur_dist_list->cred_norm); 687 688 if (!(cur_dist_list->dist_flags & HTC_EP_ACTIVE)) { 689 if (cur_dist_list->txq_depth == 0) 690 ath6k_reduce_credits(cred_info, 691 cur_dist_list, 0); 692 } 693 } 694 } 695} 696 697/* 698 * HTC has an endpoint that needs credits, ep_dist is the endpoint in 699 * question. 700 */ 701void ath6k_seek_credits(struct htc_credit_state_info *cred_info, 702 struct htc_endpoint_credit_dist *ep_dist) 703{ 704 struct htc_endpoint_credit_dist *curdist_list; 705 int credits = 0; 706 int need; 707 708 if (ep_dist->svc_id == WMI_CONTROL_SVC) 709 goto out; 710 711 if ((ep_dist->svc_id == WMI_DATA_VI_SVC) || 712 (ep_dist->svc_id == WMI_DATA_VO_SVC)) 713 if ((ep_dist->cred_assngd >= ep_dist->cred_norm)) 714 goto out; 715 716 /* 717 * For all other services, we follow a simple algorithm of: 718 * 719 * 1. checking the free pool for credits 720 * 2. checking lower priority endpoints for credits to take 721 */ 722 723 credits = min(cred_info->cur_free_credits, ep_dist->seek_cred); 724 725 if (credits >= ep_dist->seek_cred) 726 goto out; 727 728 /* 729 * We don't have enough in the free pool, try taking away from 730 * lower priority services The rule for taking away credits: 731 * 732 * 1. Only take from lower priority endpoints 733 * 2. Only take what is allocated above the minimum (never 734 * starve an endpoint completely) 735 * 3. Only take what you need. 736 */ 737 738 list_for_each_entry_reverse(curdist_list, 739 &cred_info->lowestpri_ep_dist, 740 list) { 741 if (curdist_list == ep_dist) 742 break; 743 744 need = ep_dist->seek_cred - cred_info->cur_free_credits; 745 746 if ((curdist_list->cred_assngd - need) >= 747 curdist_list->cred_min) { 748 /* 749 * The current one has been allocated more than 750 * it's minimum and it has enough credits assigned 751 * above it's minimum to fulfill our need try to 752 * take away just enough to fulfill our need. 753 */ 754 ath6k_reduce_credits(cred_info, curdist_list, 755 curdist_list->cred_assngd - need); 756 757 if (cred_info->cur_free_credits >= 758 ep_dist->seek_cred) 759 break; 760 } 761 762 if (curdist_list->endpoint == ENDPOINT_0) 763 break; 764 } 765 766 credits = min(cred_info->cur_free_credits, ep_dist->seek_cred); 767 768out: 769 /* did we find some credits? */ 770 if (credits) 771 ath6kl_deposit_credit_to_ep(cred_info, ep_dist, credits); 772 773 ep_dist->seek_cred = 0; 774} 775 776/* redistribute credits based on activity change */ 777static void ath6k_redistribute_credits(struct htc_credit_state_info *info, 778 struct list_head *ep_dist_list) 779{ 780 struct htc_endpoint_credit_dist *curdist_list; 781 782 list_for_each_entry(curdist_list, ep_dist_list, list) { 783 if (curdist_list->endpoint == ENDPOINT_0) 784 continue; 785 786 if ((curdist_list->svc_id == WMI_DATA_BK_SVC) || 787 (curdist_list->svc_id == WMI_DATA_BE_SVC)) 788 curdist_list->dist_flags |= HTC_EP_ACTIVE; 789 790 if ((curdist_list->svc_id != WMI_CONTROL_SVC) && 791 !(curdist_list->dist_flags & HTC_EP_ACTIVE)) { 792 if (curdist_list->txq_depth == 0) 793 ath6k_reduce_credits(info, 794 curdist_list, 0); 795 else 796 ath6k_reduce_credits(info, 797 curdist_list, 798 curdist_list->cred_min); 799 } 800 } 801} 802 803/* 804 * 805 * This function is invoked whenever endpoints require credit 806 * distributions. A lock is held while this function is invoked, this 807 * function shall NOT block. The ep_dist_list is a list of distribution 808 * structures in prioritized order as defined by the call to the 809 * htc_set_credit_dist() api. 810 */ 811void ath6k_credit_distribute(struct htc_credit_state_info *cred_info, 812 struct list_head *ep_dist_list, 813 enum htc_credit_dist_reason reason) 814{ 815 switch (reason) { 816 case HTC_CREDIT_DIST_SEND_COMPLETE: 817 ath6k_credit_update(cred_info, ep_dist_list); 818 break; 819 case HTC_CREDIT_DIST_ACTIVITY_CHANGE: 820 ath6k_redistribute_credits(cred_info, ep_dist_list); 821 break; 822 default: 823 break; 824 } 825 826 WARN_ON(cred_info->cur_free_credits > cred_info->total_avail_credits); 827 WARN_ON(cred_info->cur_free_credits < 0); 828} 829 830void disconnect_timer_handler(unsigned long ptr) 831{ 832 struct net_device *dev = (struct net_device *)ptr; 833 struct ath6kl *ar = ath6kl_priv(dev); 834 835 ath6kl_init_profile_info(ar); 836 ath6kl_disconnect(ar); 837} 838 839void ath6kl_disconnect(struct ath6kl *ar) 840{ 841 if (test_bit(CONNECTED, &ar->flag) || 842 test_bit(CONNECT_PEND, &ar->flag)) { 843 ath6kl_wmi_disconnect_cmd(ar->wmi); 844 /* 845 * Disconnect command is issued, clear the connect pending 846 * flag. The connected flag will be cleared in 847 * disconnect event notification. 848 */ 849 clear_bit(CONNECT_PEND, &ar->flag); 850 } 851} 852 853void ath6kl_deep_sleep_enable(struct ath6kl *ar) 854{ 855 switch (ar->sme_state) { 856 case SME_CONNECTING: 857 cfg80211_connect_result(ar->net_dev, ar->bssid, NULL, 0, 858 NULL, 0, 859 WLAN_STATUS_UNSPECIFIED_FAILURE, 860 GFP_KERNEL); 861 break; 862 case SME_CONNECTED: 863 default: 864 /* 865 * FIXME: oddly enough smeState is in DISCONNECTED during 866 * suspend, why? Need to send disconnected event in that 867 * state. 868 */ 869 cfg80211_disconnected(ar->net_dev, 0, NULL, 0, GFP_KERNEL); 870 break; 871 } 872 873 if (test_bit(CONNECTED, &ar->flag) || 874 test_bit(CONNECT_PEND, &ar->flag)) 875 ath6kl_wmi_disconnect_cmd(ar->wmi); 876 877 ar->sme_state = SME_DISCONNECTED; 878 879 /* disable scanning */ 880 if (ath6kl_wmi_scanparams_cmd(ar->wmi, 0xFFFF, 0, 0, 0, 0, 0, 0, 0, 881 0, 0) != 0) 882 printk(KERN_WARNING "ath6kl: failed to disable scan " 883 "during suspend\n"); 884 885 ath6kl_cfg80211_scan_complete_event(ar, -ECANCELED); 886} 887 888/* WMI Event handlers */ 889 890static const char *get_hw_id_string(u32 id) 891{ 892 switch (id) { 893 case AR6003_REV1_VERSION: 894 return "1.0"; 895 case AR6003_REV2_VERSION: 896 return "2.0"; 897 case AR6003_REV3_VERSION: 898 return "2.1.1"; 899 default: 900 return "unknown"; 901 } 902} 903 904void ath6kl_ready_event(void *devt, u8 *datap, u32 sw_ver, u32 abi_ver) 905{ 906 struct ath6kl *ar = devt; 907 struct net_device *dev = ar->net_dev; 908 909 memcpy(dev->dev_addr, datap, ETH_ALEN); 910 ath6kl_dbg(ATH6KL_DBG_TRC, "%s: mac addr = %pM\n", 911 __func__, dev->dev_addr); 912 913 ar->version.wlan_ver = sw_ver; 914 ar->version.abi_ver = abi_ver; 915 916 snprintf(ar->wdev->wiphy->fw_version, 917 sizeof(ar->wdev->wiphy->fw_version), 918 "%u.%u.%u.%u", 919 (ar->version.wlan_ver & 0xf0000000) >> 28, 920 (ar->version.wlan_ver & 0x0f000000) >> 24, 921 (ar->version.wlan_ver & 0x00ff0000) >> 16, 922 (ar->version.wlan_ver & 0x0000ffff)); 923 924 /* indicate to the waiting thread that the ready event was received */ 925 set_bit(WMI_READY, &ar->flag); 926 wake_up(&ar->event_wq); 927 928 ath6kl_info("hw %s fw %s%s\n", 929 get_hw_id_string(ar->wdev->wiphy->hw_version), 930 ar->wdev->wiphy->fw_version, 931 test_bit(TESTMODE, &ar->flag) ? " testmode" : ""); 932} 933 934void ath6kl_scan_complete_evt(struct ath6kl *ar, int status) 935{ 936 ath6kl_cfg80211_scan_complete_event(ar, status); 937 938 if (!ar->usr_bss_filter) 939 ath6kl_wmi_bssfilter_cmd(ar->wmi, NONE_BSS_FILTER, 0); 940 941 ath6kl_dbg(ATH6KL_DBG_WLAN_SCAN, "scan complete: %d\n", status); 942} 943 944void ath6kl_connect_event(struct ath6kl *ar, u16 channel, u8 *bssid, 945 u16 listen_int, u16 beacon_int, 946 enum network_type net_type, u8 beacon_ie_len, 947 u8 assoc_req_len, u8 assoc_resp_len, 948 u8 *assoc_info) 949{ 950 unsigned long flags; 951 952 if (ar->nw_type == AP_NETWORK) { 953 ath6kl_connect_ap_mode(ar, channel, bssid, listen_int, 954 beacon_int, assoc_req_len, 955 assoc_info + beacon_ie_len); 956 return; 957 } 958 959 ath6kl_cfg80211_connect_event(ar, channel, bssid, 960 listen_int, beacon_int, 961 net_type, beacon_ie_len, 962 assoc_req_len, assoc_resp_len, 963 assoc_info); 964 965 memcpy(ar->bssid, bssid, sizeof(ar->bssid)); 966 ar->bss_ch = channel; 967 968 if ((ar->nw_type == INFRA_NETWORK)) 969 ath6kl_wmi_listeninterval_cmd(ar->wmi, ar->listen_intvl_t, 970 ar->listen_intvl_b); 971 972 netif_wake_queue(ar->net_dev); 973 974 /* Update connect & link status atomically */ 975 spin_lock_irqsave(&ar->lock, flags); 976 set_bit(CONNECTED, &ar->flag); 977 clear_bit(CONNECT_PEND, &ar->flag); 978 netif_carrier_on(ar->net_dev); 979 spin_unlock_irqrestore(&ar->lock, flags); 980 981 aggr_reset_state(ar->aggr_cntxt); 982 ar->reconnect_flag = 0; 983 984 if ((ar->nw_type == ADHOC_NETWORK) && ar->ibss_ps_enable) { 985 memset(ar->node_map, 0, sizeof(ar->node_map)); 986 ar->node_num = 0; 987 ar->next_ep_id = ENDPOINT_2; 988 } 989 990 if (!ar->usr_bss_filter) 991 ath6kl_wmi_bssfilter_cmd(ar->wmi, NONE_BSS_FILTER, 0); 992} 993 994void ath6kl_tkip_micerr_event(struct ath6kl *ar, u8 keyid, bool ismcast) 995{ 996 struct ath6kl_sta *sta; 997 u8 tsc[6]; 998 /* 999 * For AP case, keyid will have aid of STA which sent pkt with 1000 * MIC error. Use this aid to get MAC & send it to hostapd. 1001 */ 1002 if (ar->nw_type == AP_NETWORK) { 1003 sta = ath6kl_find_sta_by_aid(ar, (keyid >> 2)); 1004 if (!sta) 1005 return; 1006 1007 ath6kl_dbg(ATH6KL_DBG_TRC, 1008 "ap tkip mic error received from aid=%d\n", keyid); 1009 1010 memset(tsc, 0, sizeof(tsc)); /* FIX: get correct TSC */ 1011 cfg80211_michael_mic_failure(ar->net_dev, sta->mac, 1012 NL80211_KEYTYPE_PAIRWISE, keyid, 1013 tsc, GFP_KERNEL); 1014 } else 1015 ath6kl_cfg80211_tkip_micerr_event(ar, keyid, ismcast); 1016 1017} 1018 1019static void ath6kl_update_target_stats(struct ath6kl *ar, u8 *ptr, u32 len) 1020{ 1021 struct wmi_target_stats *tgt_stats = 1022 (struct wmi_target_stats *) ptr; 1023 struct target_stats *stats = &ar->target_stats; 1024 struct tkip_ccmp_stats *ccmp_stats; 1025 struct bss *conn_bss = NULL; 1026 struct cserv_stats *c_stats; 1027 u8 ac; 1028 1029 if (len < sizeof(*tgt_stats)) 1030 return; 1031 1032 /* update the RSSI of the connected bss */ 1033 if (test_bit(CONNECTED, &ar->flag)) { 1034 conn_bss = ath6kl_wmi_find_node(ar->wmi, ar->bssid); 1035 if (conn_bss) { 1036 c_stats = &tgt_stats->cserv_stats; 1037 conn_bss->ni_rssi = 1038 a_sle16_to_cpu(c_stats->cs_ave_beacon_rssi); 1039 conn_bss->ni_snr = 1040 tgt_stats->cserv_stats.cs_ave_beacon_snr; 1041 ath6kl_wmi_node_return(ar->wmi, conn_bss); 1042 } 1043 } 1044 1045 ath6kl_dbg(ATH6KL_DBG_TRC, "updating target stats\n"); 1046 1047 stats->tx_pkt += le32_to_cpu(tgt_stats->stats.tx.pkt); 1048 stats->tx_byte += le32_to_cpu(tgt_stats->stats.tx.byte); 1049 stats->tx_ucast_pkt += le32_to_cpu(tgt_stats->stats.tx.ucast_pkt); 1050 stats->tx_ucast_byte += le32_to_cpu(tgt_stats->stats.tx.ucast_byte); 1051 stats->tx_mcast_pkt += le32_to_cpu(tgt_stats->stats.tx.mcast_pkt); 1052 stats->tx_mcast_byte += le32_to_cpu(tgt_stats->stats.tx.mcast_byte); 1053 stats->tx_bcast_pkt += le32_to_cpu(tgt_stats->stats.tx.bcast_pkt); 1054 stats->tx_bcast_byte += le32_to_cpu(tgt_stats->stats.tx.bcast_byte); 1055 stats->tx_rts_success_cnt += 1056 le32_to_cpu(tgt_stats->stats.tx.rts_success_cnt); 1057 1058 for (ac = 0; ac < WMM_NUM_AC; ac++) 1059 stats->tx_pkt_per_ac[ac] += 1060 le32_to_cpu(tgt_stats->stats.tx.pkt_per_ac[ac]); 1061 1062 stats->tx_err += le32_to_cpu(tgt_stats->stats.tx.err); 1063 stats->tx_fail_cnt += le32_to_cpu(tgt_stats->stats.tx.fail_cnt); 1064 stats->tx_retry_cnt += le32_to_cpu(tgt_stats->stats.tx.retry_cnt); 1065 stats->tx_mult_retry_cnt += 1066 le32_to_cpu(tgt_stats->stats.tx.mult_retry_cnt); 1067 stats->tx_rts_fail_cnt += 1068 le32_to_cpu(tgt_stats->stats.tx.rts_fail_cnt); 1069 stats->tx_ucast_rate = 1070 ath6kl_wmi_get_rate(a_sle32_to_cpu(tgt_stats->stats.tx.ucast_rate)); 1071 1072 stats->rx_pkt += le32_to_cpu(tgt_stats->stats.rx.pkt); 1073 stats->rx_byte += le32_to_cpu(tgt_stats->stats.rx.byte); 1074 stats->rx_ucast_pkt += le32_to_cpu(tgt_stats->stats.rx.ucast_pkt); 1075 stats->rx_ucast_byte += le32_to_cpu(tgt_stats->stats.rx.ucast_byte); 1076 stats->rx_mcast_pkt += le32_to_cpu(tgt_stats->stats.rx.mcast_pkt); 1077 stats->rx_mcast_byte += le32_to_cpu(tgt_stats->stats.rx.mcast_byte); 1078 stats->rx_bcast_pkt += le32_to_cpu(tgt_stats->stats.rx.bcast_pkt); 1079 stats->rx_bcast_byte += le32_to_cpu(tgt_stats->stats.rx.bcast_byte); 1080 stats->rx_frgment_pkt += le32_to_cpu(tgt_stats->stats.rx.frgment_pkt); 1081 stats->rx_err += le32_to_cpu(tgt_stats->stats.rx.err); 1082 stats->rx_crc_err += le32_to_cpu(tgt_stats->stats.rx.crc_err); 1083 stats->rx_key_cache_miss += 1084 le32_to_cpu(tgt_stats->stats.rx.key_cache_miss); 1085 stats->rx_decrypt_err += le32_to_cpu(tgt_stats->stats.rx.decrypt_err); 1086 stats->rx_dupl_frame += le32_to_cpu(tgt_stats->stats.rx.dupl_frame); 1087 stats->rx_ucast_rate = 1088 ath6kl_wmi_get_rate(a_sle32_to_cpu(tgt_stats->stats.rx.ucast_rate)); 1089 1090 ccmp_stats = &tgt_stats->stats.tkip_ccmp_stats; 1091 1092 stats->tkip_local_mic_fail += 1093 le32_to_cpu(ccmp_stats->tkip_local_mic_fail); 1094 stats->tkip_cnter_measures_invoked += 1095 le32_to_cpu(ccmp_stats->tkip_cnter_measures_invoked); 1096 stats->tkip_fmt_err += le32_to_cpu(ccmp_stats->tkip_fmt_err); 1097 1098 stats->ccmp_fmt_err += le32_to_cpu(ccmp_stats->ccmp_fmt_err); 1099 stats->ccmp_replays += le32_to_cpu(ccmp_stats->ccmp_replays); 1100 1101 stats->pwr_save_fail_cnt += 1102 le32_to_cpu(tgt_stats->pm_stats.pwr_save_failure_cnt); 1103 stats->noise_floor_calib = 1104 a_sle32_to_cpu(tgt_stats->noise_floor_calib); 1105 1106 stats->cs_bmiss_cnt += 1107 le32_to_cpu(tgt_stats->cserv_stats.cs_bmiss_cnt); 1108 stats->cs_low_rssi_cnt += 1109 le32_to_cpu(tgt_stats->cserv_stats.cs_low_rssi_cnt); 1110 stats->cs_connect_cnt += 1111 le16_to_cpu(tgt_stats->cserv_stats.cs_connect_cnt); 1112 stats->cs_discon_cnt += 1113 le16_to_cpu(tgt_stats->cserv_stats.cs_discon_cnt); 1114 1115 stats->cs_ave_beacon_rssi = 1116 a_sle16_to_cpu(tgt_stats->cserv_stats.cs_ave_beacon_rssi); 1117 1118 stats->cs_last_roam_msec = 1119 tgt_stats->cserv_stats.cs_last_roam_msec; 1120 stats->cs_snr = tgt_stats->cserv_stats.cs_snr; 1121 stats->cs_rssi = a_sle16_to_cpu(tgt_stats->cserv_stats.cs_rssi); 1122 1123 stats->lq_val = le32_to_cpu(tgt_stats->lq_val); 1124 1125 stats->wow_pkt_dropped += 1126 le32_to_cpu(tgt_stats->wow_stats.wow_pkt_dropped); 1127 stats->wow_host_pkt_wakeups += 1128 tgt_stats->wow_stats.wow_host_pkt_wakeups; 1129 stats->wow_host_evt_wakeups += 1130 tgt_stats->wow_stats.wow_host_evt_wakeups; 1131 stats->wow_evt_discarded += 1132 le16_to_cpu(tgt_stats->wow_stats.wow_evt_discarded); 1133 1134 if (test_bit(STATS_UPDATE_PEND, &ar->flag)) { 1135 clear_bit(STATS_UPDATE_PEND, &ar->flag); 1136 wake_up(&ar->event_wq); 1137 } 1138} 1139 1140static void ath6kl_add_le32(__le32 *var, __le32 val) 1141{ 1142 *var = cpu_to_le32(le32_to_cpu(*var) + le32_to_cpu(val)); 1143} 1144 1145void ath6kl_tgt_stats_event(struct ath6kl *ar, u8 *ptr, u32 len) 1146{ 1147 struct wmi_ap_mode_stat *p = (struct wmi_ap_mode_stat *) ptr; 1148 struct wmi_ap_mode_stat *ap = &ar->ap_stats; 1149 struct wmi_per_sta_stat *st_ap, *st_p; 1150 u8 ac; 1151 1152 if (ar->nw_type == AP_NETWORK) { 1153 if (len < sizeof(*p)) 1154 return; 1155 1156 for (ac = 0; ac < AP_MAX_NUM_STA; ac++) { 1157 st_ap = &ap->sta[ac]; 1158 st_p = &p->sta[ac]; 1159 1160 ath6kl_add_le32(&st_ap->tx_bytes, st_p->tx_bytes); 1161 ath6kl_add_le32(&st_ap->tx_pkts, st_p->tx_pkts); 1162 ath6kl_add_le32(&st_ap->tx_error, st_p->tx_error); 1163 ath6kl_add_le32(&st_ap->tx_discard, st_p->tx_discard); 1164 ath6kl_add_le32(&st_ap->rx_bytes, st_p->rx_bytes); 1165 ath6kl_add_le32(&st_ap->rx_pkts, st_p->rx_pkts); 1166 ath6kl_add_le32(&st_ap->rx_error, st_p->rx_error); 1167 ath6kl_add_le32(&st_ap->rx_discard, st_p->rx_discard); 1168 } 1169 1170 } else { 1171 ath6kl_update_target_stats(ar, ptr, len); 1172 } 1173} 1174 1175void ath6kl_wakeup_event(void *dev) 1176{ 1177 struct ath6kl *ar = (struct ath6kl *) dev; 1178 1179 wake_up(&ar->event_wq); 1180} 1181 1182void ath6kl_txpwr_rx_evt(void *devt, u8 tx_pwr) 1183{ 1184 struct ath6kl *ar = (struct ath6kl *) devt; 1185 1186 ar->tx_pwr = tx_pwr; 1187 wake_up(&ar->event_wq); 1188} 1189 1190void ath6kl_pspoll_event(struct ath6kl *ar, u8 aid) 1191{ 1192 struct ath6kl_sta *conn; 1193 struct sk_buff *skb; 1194 bool psq_empty = false; 1195 1196 conn = ath6kl_find_sta_by_aid(ar, aid); 1197 1198 if (!conn) 1199 return; 1200 /* 1201 * Send out a packet queued on ps queue. When the ps queue 1202 * becomes empty update the PVB for this station. 1203 */ 1204 spin_lock_bh(&conn->psq_lock); 1205 psq_empty = skb_queue_empty(&conn->psq); 1206 spin_unlock_bh(&conn->psq_lock); 1207 1208 if (psq_empty) 1209 /* TODO: Send out a NULL data frame */ 1210 return; 1211 1212 spin_lock_bh(&conn->psq_lock); 1213 skb = skb_dequeue(&conn->psq); 1214 spin_unlock_bh(&conn->psq_lock); 1215 1216 conn->sta_flags |= STA_PS_POLLED; 1217 ath6kl_data_tx(skb, ar->net_dev); 1218 conn->sta_flags &= ~STA_PS_POLLED; 1219 1220 spin_lock_bh(&conn->psq_lock); 1221 psq_empty = skb_queue_empty(&conn->psq); 1222 spin_unlock_bh(&conn->psq_lock); 1223 1224 if (psq_empty) 1225 ath6kl_wmi_set_pvb_cmd(ar->wmi, conn->aid, 0); 1226} 1227 1228void ath6kl_dtimexpiry_event(struct ath6kl *ar) 1229{ 1230 bool mcastq_empty = false; 1231 struct sk_buff *skb; 1232 1233 /* 1234 * If there are no associated STAs, ignore the DTIM expiry event. 1235 * There can be potential race conditions where the last associated 1236 * STA may disconnect & before the host could clear the 'Indicate 1237 * DTIM' request to the firmware, the firmware would have just 1238 * indicated a DTIM expiry event. The race is between 'clear DTIM 1239 * expiry cmd' going from the host to the firmware & the DTIM 1240 * expiry event happening from the firmware to the host. 1241 */ 1242 if (!ar->sta_list_index) 1243 return; 1244 1245 spin_lock_bh(&ar->mcastpsq_lock); 1246 mcastq_empty = skb_queue_empty(&ar->mcastpsq); 1247 spin_unlock_bh(&ar->mcastpsq_lock); 1248 1249 if (mcastq_empty) 1250 return; 1251 1252 /* set the STA flag to dtim_expired for the frame to go out */ 1253 set_bit(DTIM_EXPIRED, &ar->flag); 1254 1255 spin_lock_bh(&ar->mcastpsq_lock); 1256 while ((skb = skb_dequeue(&ar->mcastpsq)) != NULL) { 1257 spin_unlock_bh(&ar->mcastpsq_lock); 1258 1259 ath6kl_data_tx(skb, ar->net_dev); 1260 1261 spin_lock_bh(&ar->mcastpsq_lock); 1262 } 1263 spin_unlock_bh(&ar->mcastpsq_lock); 1264 1265 clear_bit(DTIM_EXPIRED, &ar->flag); 1266 1267 /* clear the LSB of the BitMapCtl field of the TIM IE */ 1268 ath6kl_wmi_set_pvb_cmd(ar->wmi, MCAST_AID, 0); 1269} 1270 1271void ath6kl_disconnect_event(struct ath6kl *ar, u8 reason, u8 *bssid, 1272 u8 assoc_resp_len, u8 *assoc_info, 1273 u16 prot_reason_status) 1274{ 1275 struct bss *wmi_ssid_node = NULL; 1276 unsigned long flags; 1277 1278 if (ar->nw_type == AP_NETWORK) { 1279 if (!ath6kl_remove_sta(ar, bssid, prot_reason_status)) 1280 return; 1281 1282 /* if no more associated STAs, empty the mcast PS q */ 1283 if (ar->sta_list_index == 0) { 1284 spin_lock_bh(&ar->mcastpsq_lock); 1285 skb_queue_purge(&ar->mcastpsq); 1286 spin_unlock_bh(&ar->mcastpsq_lock); 1287 1288 /* clear the LSB of the TIM IE's BitMapCtl field */ 1289 if (test_bit(WMI_READY, &ar->flag)) 1290 ath6kl_wmi_set_pvb_cmd(ar->wmi, MCAST_AID, 0); 1291 } 1292 1293 if (!is_broadcast_ether_addr(bssid)) { 1294 /* send event to application */ 1295 cfg80211_del_sta(ar->net_dev, bssid, GFP_KERNEL); 1296 } 1297 1298 if (memcmp(ar->net_dev->dev_addr, bssid, ETH_ALEN) == 0) 1299 clear_bit(CONNECTED, &ar->flag); 1300 return; 1301 } 1302 1303 ath6kl_cfg80211_disconnect_event(ar, reason, bssid, 1304 assoc_resp_len, assoc_info, 1305 prot_reason_status); 1306 1307 aggr_reset_state(ar->aggr_cntxt); 1308 1309 del_timer(&ar->disconnect_timer); 1310 1311 ath6kl_dbg(ATH6KL_DBG_WLAN_CONNECT, 1312 "disconnect reason is %d\n", reason); 1313 1314 /* 1315 * If the event is due to disconnect cmd from the host, only they 1316 * the target would stop trying to connect. Under any other 1317 * condition, target would keep trying to connect. 1318 */ 1319 if (reason == DISCONNECT_CMD) { 1320 if (!ar->usr_bss_filter && test_bit(WMI_READY, &ar->flag)) 1321 ath6kl_wmi_bssfilter_cmd(ar->wmi, NONE_BSS_FILTER, 0); 1322 } else { 1323 set_bit(CONNECT_PEND, &ar->flag); 1324 if (((reason == ASSOC_FAILED) && 1325 (prot_reason_status == 0x11)) || 1326 ((reason == ASSOC_FAILED) && (prot_reason_status == 0x0) 1327 && (ar->reconnect_flag == 1))) { 1328 set_bit(CONNECTED, &ar->flag); 1329 return; 1330 } 1331 } 1332 1333 if ((reason == NO_NETWORK_AVAIL) && test_bit(WMI_READY, &ar->flag)) { 1334 ath6kl_wmi_node_free(ar->wmi, bssid); 1335 1336 /* 1337 * In case any other same SSID nodes are present remove it, 1338 * since those nodes also not available now. 1339 */ 1340 do { 1341 /* 1342 * Find the nodes based on SSID and remove it 1343 * 1344 * Note: This case will not work out for 1345 * Hidden-SSID 1346 */ 1347 wmi_ssid_node = ath6kl_wmi_find_ssid_node(ar->wmi, 1348 ar->ssid, 1349 ar->ssid_len, 1350 false, 1351 true); 1352 1353 if (wmi_ssid_node) 1354 ath6kl_wmi_node_free(ar->wmi, 1355 wmi_ssid_node->ni_macaddr); 1356 1357 } while (wmi_ssid_node); 1358 } 1359 1360 /* update connect & link status atomically */ 1361 spin_lock_irqsave(&ar->lock, flags); 1362 clear_bit(CONNECTED, &ar->flag); 1363 netif_carrier_off(ar->net_dev); 1364 spin_unlock_irqrestore(&ar->lock, flags); 1365 1366 if ((reason != CSERV_DISCONNECT) || (ar->reconnect_flag != 1)) 1367 ar->reconnect_flag = 0; 1368 1369 if (reason != CSERV_DISCONNECT) 1370 ar->user_key_ctrl = 0; 1371 1372 netif_stop_queue(ar->net_dev); 1373 memset(ar->bssid, 0, sizeof(ar->bssid)); 1374 ar->bss_ch = 0; 1375 1376 ath6kl_tx_data_cleanup(ar); 1377} 1378 1379static int ath6kl_open(struct net_device *dev) 1380{ 1381 struct ath6kl *ar = ath6kl_priv(dev); 1382 unsigned long flags; 1383 1384 spin_lock_irqsave(&ar->lock, flags); 1385 1386 set_bit(WLAN_ENABLED, &ar->flag); 1387 1388 if (test_bit(CONNECTED, &ar->flag)) { 1389 netif_carrier_on(dev); 1390 netif_wake_queue(dev); 1391 } else 1392 netif_carrier_off(dev); 1393 1394 spin_unlock_irqrestore(&ar->lock, flags); 1395 1396 return 0; 1397} 1398 1399static int ath6kl_close(struct net_device *dev) 1400{ 1401 struct ath6kl *ar = ath6kl_priv(dev); 1402 1403 netif_stop_queue(dev); 1404 1405 ath6kl_disconnect(ar); 1406 1407 if (test_bit(WMI_READY, &ar->flag)) { 1408 if (ath6kl_wmi_scanparams_cmd(ar->wmi, 0xFFFF, 0, 0, 0, 0, 0, 0, 1409 0, 0, 0)) 1410 return -EIO; 1411 1412 clear_bit(WLAN_ENABLED, &ar->flag); 1413 } 1414 1415 ath6kl_cfg80211_scan_complete_event(ar, -ECANCELED); 1416 1417 return 0; 1418} 1419 1420static struct net_device_stats *ath6kl_get_stats(struct net_device *dev) 1421{ 1422 struct ath6kl *ar = ath6kl_priv(dev); 1423 1424 return &ar->net_stats; 1425} 1426 1427static struct net_device_ops ath6kl_netdev_ops = { 1428 .ndo_open = ath6kl_open, 1429 .ndo_stop = ath6kl_close, 1430 .ndo_start_xmit = ath6kl_data_tx, 1431 .ndo_get_stats = ath6kl_get_stats, 1432}; 1433 1434void init_netdev(struct net_device *dev) 1435{ 1436 dev->netdev_ops = &ath6kl_netdev_ops; 1437 dev->watchdog_timeo = ATH6KL_TX_TIMEOUT; 1438 1439 dev->needed_headroom = ETH_HLEN; 1440 dev->needed_headroom += sizeof(struct ath6kl_llc_snap_hdr) + 1441 sizeof(struct wmi_data_hdr) + HTC_HDR_LENGTH 1442 + WMI_MAX_TX_META_SZ + ATH6KL_HTC_ALIGN_BYTES; 1443 1444 return; 1445} 1446