main.c revision fa99e963b1976374db1d89aea854e8740b92796d
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_vif *vif, u8 *node_addr) 24{ 25 struct ath6kl *ar = vif->ar; 26 struct ath6kl_sta *conn = NULL; 27 u8 i, max_conn; 28 29 max_conn = (vif->nw_type == AP_NETWORK) ? AP_MAX_NUM_STA : 0; 30 31 for (i = 0; i < max_conn; i++) { 32 if (memcmp(node_addr, ar->sta_list[i].mac, ETH_ALEN) == 0) { 33 conn = &ar->sta_list[i]; 34 break; 35 } 36 } 37 38 return conn; 39} 40 41struct ath6kl_sta *ath6kl_find_sta_by_aid(struct ath6kl *ar, u8 aid) 42{ 43 struct ath6kl_sta *conn = NULL; 44 u8 ctr; 45 46 for (ctr = 0; ctr < AP_MAX_NUM_STA; ctr++) { 47 if (ar->sta_list[ctr].aid == aid) { 48 conn = &ar->sta_list[ctr]; 49 break; 50 } 51 } 52 return conn; 53} 54 55static void ath6kl_add_new_sta(struct ath6kl *ar, u8 *mac, u16 aid, u8 *wpaie, 56 u8 ielen, u8 keymgmt, u8 ucipher, u8 auth) 57{ 58 struct ath6kl_sta *sta; 59 u8 free_slot; 60 61 free_slot = aid - 1; 62 63 sta = &ar->sta_list[free_slot]; 64 memcpy(sta->mac, mac, ETH_ALEN); 65 if (ielen <= ATH6KL_MAX_IE) 66 memcpy(sta->wpa_ie, wpaie, ielen); 67 sta->aid = aid; 68 sta->keymgmt = keymgmt; 69 sta->ucipher = ucipher; 70 sta->auth = auth; 71 72 ar->sta_list_index = ar->sta_list_index | (1 << free_slot); 73 ar->ap_stats.sta[free_slot].aid = cpu_to_le32(aid); 74} 75 76static void ath6kl_sta_cleanup(struct ath6kl *ar, u8 i) 77{ 78 struct ath6kl_sta *sta = &ar->sta_list[i]; 79 80 /* empty the queued pkts in the PS queue if any */ 81 spin_lock_bh(&sta->psq_lock); 82 skb_queue_purge(&sta->psq); 83 spin_unlock_bh(&sta->psq_lock); 84 85 memset(&ar->ap_stats.sta[sta->aid - 1], 0, 86 sizeof(struct wmi_per_sta_stat)); 87 memset(sta->mac, 0, ETH_ALEN); 88 memset(sta->wpa_ie, 0, ATH6KL_MAX_IE); 89 sta->aid = 0; 90 sta->sta_flags = 0; 91 92 ar->sta_list_index = ar->sta_list_index & ~(1 << i); 93 94} 95 96static u8 ath6kl_remove_sta(struct ath6kl *ar, u8 *mac, u16 reason) 97{ 98 u8 i, removed = 0; 99 100 if (is_zero_ether_addr(mac)) 101 return removed; 102 103 if (is_broadcast_ether_addr(mac)) { 104 ath6kl_dbg(ATH6KL_DBG_TRC, "deleting all station\n"); 105 106 for (i = 0; i < AP_MAX_NUM_STA; i++) { 107 if (!is_zero_ether_addr(ar->sta_list[i].mac)) { 108 ath6kl_sta_cleanup(ar, i); 109 removed = 1; 110 } 111 } 112 } else { 113 for (i = 0; i < AP_MAX_NUM_STA; i++) { 114 if (memcmp(ar->sta_list[i].mac, mac, ETH_ALEN) == 0) { 115 ath6kl_dbg(ATH6KL_DBG_TRC, 116 "deleting station %pM aid=%d reason=%d\n", 117 mac, ar->sta_list[i].aid, reason); 118 ath6kl_sta_cleanup(ar, i); 119 removed = 1; 120 break; 121 } 122 } 123 } 124 125 return removed; 126} 127 128enum htc_endpoint_id ath6kl_ac2_endpoint_id(void *devt, u8 ac) 129{ 130 struct ath6kl *ar = devt; 131 return ar->ac2ep_map[ac]; 132} 133 134struct ath6kl_cookie *ath6kl_alloc_cookie(struct ath6kl *ar) 135{ 136 struct ath6kl_cookie *cookie; 137 138 cookie = ar->cookie_list; 139 if (cookie != NULL) { 140 ar->cookie_list = cookie->arc_list_next; 141 ar->cookie_count--; 142 } 143 144 return cookie; 145} 146 147void ath6kl_cookie_init(struct ath6kl *ar) 148{ 149 u32 i; 150 151 ar->cookie_list = NULL; 152 ar->cookie_count = 0; 153 154 memset(ar->cookie_mem, 0, sizeof(ar->cookie_mem)); 155 156 for (i = 0; i < MAX_COOKIE_NUM; i++) 157 ath6kl_free_cookie(ar, &ar->cookie_mem[i]); 158} 159 160void ath6kl_cookie_cleanup(struct ath6kl *ar) 161{ 162 ar->cookie_list = NULL; 163 ar->cookie_count = 0; 164} 165 166void ath6kl_free_cookie(struct ath6kl *ar, struct ath6kl_cookie *cookie) 167{ 168 /* Insert first */ 169 170 if (!ar || !cookie) 171 return; 172 173 cookie->arc_list_next = ar->cookie_list; 174 ar->cookie_list = cookie; 175 ar->cookie_count++; 176} 177 178/* set the window address register (using 4-byte register access ). */ 179static int ath6kl_set_addrwin_reg(struct ath6kl *ar, u32 reg_addr, u32 addr) 180{ 181 int status; 182 s32 i; 183 __le32 addr_val; 184 185 /* 186 * Write bytes 1,2,3 of the register to set the upper address bytes, 187 * the LSB is written last to initiate the access cycle 188 */ 189 190 for (i = 1; i <= 3; i++) { 191 /* 192 * Fill the buffer with the address byte value we want to 193 * hit 4 times. No need to worry about endianness as the 194 * same byte is copied to all four bytes of addr_val at 195 * any time. 196 */ 197 memset((u8 *)&addr_val, ((u8 *)&addr)[i], 4); 198 199 /* 200 * Hit each byte of the register address with a 4-byte 201 * write operation to the same address, this is a harmless 202 * operation. 203 */ 204 status = hif_read_write_sync(ar, reg_addr + i, (u8 *)&addr_val, 205 4, HIF_WR_SYNC_BYTE_FIX); 206 if (status) 207 break; 208 } 209 210 if (status) { 211 ath6kl_err("failed to write initial bytes of 0x%x to window reg: 0x%X\n", 212 addr, reg_addr); 213 return status; 214 } 215 216 /* 217 * Write the address register again, this time write the whole 218 * 4-byte value. The effect here is that the LSB write causes the 219 * cycle to start, the extra 3 byte write to bytes 1,2,3 has no 220 * effect since we are writing the same values again 221 */ 222 addr_val = cpu_to_le32(addr); 223 status = hif_read_write_sync(ar, reg_addr, 224 (u8 *)&(addr_val), 225 4, HIF_WR_SYNC_BYTE_INC); 226 227 if (status) { 228 ath6kl_err("failed to write 0x%x to window reg: 0x%X\n", 229 addr, reg_addr); 230 return status; 231 } 232 233 return 0; 234} 235 236/* 237 * Read from the hardware through its diagnostic window. No cooperation 238 * from the firmware is required for this. 239 */ 240int ath6kl_diag_read32(struct ath6kl *ar, u32 address, u32 *value) 241{ 242 int ret; 243 244 /* set window register to start read cycle */ 245 ret = ath6kl_set_addrwin_reg(ar, WINDOW_READ_ADDR_ADDRESS, address); 246 if (ret) 247 return ret; 248 249 /* read the data */ 250 ret = hif_read_write_sync(ar, WINDOW_DATA_ADDRESS, (u8 *) value, 251 sizeof(*value), HIF_RD_SYNC_BYTE_INC); 252 if (ret) { 253 ath6kl_warn("failed to read32 through diagnose window: %d\n", 254 ret); 255 return ret; 256 } 257 258 return 0; 259} 260 261/* 262 * Write to the ATH6KL through its diagnostic window. No cooperation from 263 * the Target is required for this. 264 */ 265int ath6kl_diag_write32(struct ath6kl *ar, u32 address, __le32 value) 266{ 267 int ret; 268 269 /* set write data */ 270 ret = hif_read_write_sync(ar, WINDOW_DATA_ADDRESS, (u8 *) &value, 271 sizeof(value), HIF_WR_SYNC_BYTE_INC); 272 if (ret) { 273 ath6kl_err("failed to write 0x%x during diagnose window to 0x%d\n", 274 address, value); 275 return ret; 276 } 277 278 /* set window register, which starts the write cycle */ 279 return ath6kl_set_addrwin_reg(ar, WINDOW_WRITE_ADDR_ADDRESS, 280 address); 281} 282 283int ath6kl_diag_read(struct ath6kl *ar, u32 address, void *data, u32 length) 284{ 285 u32 count, *buf = data; 286 int ret; 287 288 if (WARN_ON(length % 4)) 289 return -EINVAL; 290 291 for (count = 0; count < length / 4; count++, address += 4) { 292 ret = ath6kl_diag_read32(ar, address, &buf[count]); 293 if (ret) 294 return ret; 295 } 296 297 return 0; 298} 299 300int ath6kl_diag_write(struct ath6kl *ar, u32 address, void *data, u32 length) 301{ 302 u32 count; 303 __le32 *buf = data; 304 int ret; 305 306 if (WARN_ON(length % 4)) 307 return -EINVAL; 308 309 for (count = 0; count < length / 4; count++, address += 4) { 310 ret = ath6kl_diag_write32(ar, address, buf[count]); 311 if (ret) 312 return ret; 313 } 314 315 return 0; 316} 317 318int ath6kl_read_fwlogs(struct ath6kl *ar) 319{ 320 struct ath6kl_dbglog_hdr debug_hdr; 321 struct ath6kl_dbglog_buf debug_buf; 322 u32 address, length, dropped, firstbuf, debug_hdr_addr; 323 int ret = 0, loop; 324 u8 *buf; 325 326 buf = kmalloc(ATH6KL_FWLOG_PAYLOAD_SIZE, GFP_KERNEL); 327 if (!buf) 328 return -ENOMEM; 329 330 address = TARG_VTOP(ar->target_type, 331 ath6kl_get_hi_item_addr(ar, 332 HI_ITEM(hi_dbglog_hdr))); 333 334 ret = ath6kl_diag_read32(ar, address, &debug_hdr_addr); 335 if (ret) 336 goto out; 337 338 /* Get the contents of the ring buffer */ 339 if (debug_hdr_addr == 0) { 340 ath6kl_warn("Invalid address for debug_hdr_addr\n"); 341 ret = -EINVAL; 342 goto out; 343 } 344 345 address = TARG_VTOP(ar->target_type, debug_hdr_addr); 346 ath6kl_diag_read(ar, address, &debug_hdr, sizeof(debug_hdr)); 347 348 address = TARG_VTOP(ar->target_type, 349 le32_to_cpu(debug_hdr.dbuf_addr)); 350 firstbuf = address; 351 dropped = le32_to_cpu(debug_hdr.dropped); 352 ath6kl_diag_read(ar, address, &debug_buf, sizeof(debug_buf)); 353 354 loop = 100; 355 356 do { 357 address = TARG_VTOP(ar->target_type, 358 le32_to_cpu(debug_buf.buffer_addr)); 359 length = le32_to_cpu(debug_buf.length); 360 361 if (length != 0 && (le32_to_cpu(debug_buf.length) <= 362 le32_to_cpu(debug_buf.bufsize))) { 363 length = ALIGN(length, 4); 364 365 ret = ath6kl_diag_read(ar, address, 366 buf, length); 367 if (ret) 368 goto out; 369 370 ath6kl_debug_fwlog_event(ar, buf, length); 371 } 372 373 address = TARG_VTOP(ar->target_type, 374 le32_to_cpu(debug_buf.next)); 375 ath6kl_diag_read(ar, address, &debug_buf, sizeof(debug_buf)); 376 if (ret) 377 goto out; 378 379 loop--; 380 381 if (WARN_ON(loop == 0)) { 382 ret = -ETIMEDOUT; 383 goto out; 384 } 385 } while (address != firstbuf); 386 387out: 388 kfree(buf); 389 390 return ret; 391} 392 393/* FIXME: move to a better place, target.h? */ 394#define AR6003_RESET_CONTROL_ADDRESS 0x00004000 395#define AR6004_RESET_CONTROL_ADDRESS 0x00004000 396 397void ath6kl_reset_device(struct ath6kl *ar, u32 target_type, 398 bool wait_fot_compltn, bool cold_reset) 399{ 400 int status = 0; 401 u32 address; 402 __le32 data; 403 404 if (target_type != TARGET_TYPE_AR6003 && 405 target_type != TARGET_TYPE_AR6004) 406 return; 407 408 data = cold_reset ? cpu_to_le32(RESET_CONTROL_COLD_RST) : 409 cpu_to_le32(RESET_CONTROL_MBOX_RST); 410 411 switch (target_type) { 412 case TARGET_TYPE_AR6003: 413 address = AR6003_RESET_CONTROL_ADDRESS; 414 break; 415 case TARGET_TYPE_AR6004: 416 address = AR6004_RESET_CONTROL_ADDRESS; 417 break; 418 default: 419 address = AR6003_RESET_CONTROL_ADDRESS; 420 break; 421 } 422 423 status = ath6kl_diag_write32(ar, address, data); 424 425 if (status) 426 ath6kl_err("failed to reset target\n"); 427} 428 429static void ath6kl_install_static_wep_keys(struct ath6kl_vif *vif) 430{ 431 u8 index; 432 u8 keyusage; 433 434 for (index = WMI_MIN_KEY_INDEX; index <= WMI_MAX_KEY_INDEX; index++) { 435 if (vif->wep_key_list[index].key_len) { 436 keyusage = GROUP_USAGE; 437 if (index == vif->def_txkey_index) 438 keyusage |= TX_USAGE; 439 440 ath6kl_wmi_addkey_cmd(vif->ar->wmi, vif->fw_vif_idx, 441 index, 442 WEP_CRYPT, 443 keyusage, 444 vif->wep_key_list[index].key_len, 445 NULL, 446 vif->wep_key_list[index].key, 447 KEY_OP_INIT_VAL, NULL, 448 NO_SYNC_WMIFLAG); 449 } 450 } 451} 452 453void ath6kl_connect_ap_mode_bss(struct ath6kl_vif *vif, u16 channel) 454{ 455 struct ath6kl *ar = vif->ar; 456 struct ath6kl_req_key *ik; 457 int res; 458 u8 key_rsc[ATH6KL_KEY_SEQ_LEN]; 459 460 ik = &ar->ap_mode_bkey; 461 462 ath6kl_dbg(ATH6KL_DBG_WLAN_CFG, "AP mode started on %u MHz\n", channel); 463 464 switch (vif->auth_mode) { 465 case NONE_AUTH: 466 if (vif->prwise_crypto == WEP_CRYPT) 467 ath6kl_install_static_wep_keys(vif); 468 break; 469 case WPA_PSK_AUTH: 470 case WPA2_PSK_AUTH: 471 case (WPA_PSK_AUTH | WPA2_PSK_AUTH): 472 if (!ik->valid) 473 break; 474 475 ath6kl_dbg(ATH6KL_DBG_WLAN_CFG, "Delayed addkey for " 476 "the initial group key for AP mode\n"); 477 memset(key_rsc, 0, sizeof(key_rsc)); 478 res = ath6kl_wmi_addkey_cmd( 479 ar->wmi, vif->fw_vif_idx, ik->key_index, ik->key_type, 480 GROUP_USAGE, ik->key_len, key_rsc, ik->key, 481 KEY_OP_INIT_VAL, NULL, SYNC_BOTH_WMIFLAG); 482 if (res) { 483 ath6kl_dbg(ATH6KL_DBG_WLAN_CFG, "Delayed " 484 "addkey failed: %d\n", res); 485 } 486 break; 487 } 488 489 ath6kl_wmi_bssfilter_cmd(ar->wmi, vif->fw_vif_idx, NONE_BSS_FILTER, 0); 490 set_bit(CONNECTED, &vif->flags); 491 netif_carrier_on(vif->ndev); 492} 493 494void ath6kl_connect_ap_mode_sta(struct ath6kl_vif *vif, u16 aid, u8 *mac_addr, 495 u8 keymgmt, u8 ucipher, u8 auth, 496 u8 assoc_req_len, u8 *assoc_info) 497{ 498 struct ath6kl *ar = vif->ar; 499 u8 *ies = NULL, *wpa_ie = NULL, *pos; 500 size_t ies_len = 0; 501 struct station_info sinfo; 502 503 ath6kl_dbg(ATH6KL_DBG_TRC, "new station %pM aid=%d\n", mac_addr, aid); 504 505 if (assoc_req_len > sizeof(struct ieee80211_hdr_3addr)) { 506 struct ieee80211_mgmt *mgmt = 507 (struct ieee80211_mgmt *) assoc_info; 508 if (ieee80211_is_assoc_req(mgmt->frame_control) && 509 assoc_req_len >= sizeof(struct ieee80211_hdr_3addr) + 510 sizeof(mgmt->u.assoc_req)) { 511 ies = mgmt->u.assoc_req.variable; 512 ies_len = assoc_info + assoc_req_len - ies; 513 } else if (ieee80211_is_reassoc_req(mgmt->frame_control) && 514 assoc_req_len >= sizeof(struct ieee80211_hdr_3addr) 515 + sizeof(mgmt->u.reassoc_req)) { 516 ies = mgmt->u.reassoc_req.variable; 517 ies_len = assoc_info + assoc_req_len - ies; 518 } 519 } 520 521 pos = ies; 522 while (pos && pos + 1 < ies + ies_len) { 523 if (pos + 2 + pos[1] > ies + ies_len) 524 break; 525 if (pos[0] == WLAN_EID_RSN) 526 wpa_ie = pos; /* RSN IE */ 527 else if (pos[0] == WLAN_EID_VENDOR_SPECIFIC && 528 pos[1] >= 4 && 529 pos[2] == 0x00 && pos[3] == 0x50 && pos[4] == 0xf2) { 530 if (pos[5] == 0x01) 531 wpa_ie = pos; /* WPA IE */ 532 else if (pos[5] == 0x04) { 533 wpa_ie = pos; /* WPS IE */ 534 break; /* overrides WPA/RSN IE */ 535 } 536 } 537 pos += 2 + pos[1]; 538 } 539 540 ath6kl_add_new_sta(ar, mac_addr, aid, wpa_ie, 541 wpa_ie ? 2 + wpa_ie[1] : 0, 542 keymgmt, ucipher, auth); 543 544 /* send event to application */ 545 memset(&sinfo, 0, sizeof(sinfo)); 546 547 /* TODO: sinfo.generation */ 548 549 sinfo.assoc_req_ies = ies; 550 sinfo.assoc_req_ies_len = ies_len; 551 sinfo.filled |= STATION_INFO_ASSOC_REQ_IES; 552 553 cfg80211_new_sta(vif->ndev, mac_addr, &sinfo, GFP_KERNEL); 554 555 netif_wake_queue(vif->ndev); 556} 557 558/* Functions for Tx credit handling */ 559void ath6kl_credit_init(struct htc_credit_state_info *cred_info, 560 struct list_head *ep_list, 561 int tot_credits) 562{ 563 struct htc_endpoint_credit_dist *cur_ep_dist; 564 int count; 565 566 cred_info->cur_free_credits = tot_credits; 567 cred_info->total_avail_credits = tot_credits; 568 569 list_for_each_entry(cur_ep_dist, ep_list, list) { 570 if (cur_ep_dist->endpoint == ENDPOINT_0) 571 continue; 572 573 cur_ep_dist->cred_min = cur_ep_dist->cred_per_msg; 574 575 if (tot_credits > 4) { 576 if ((cur_ep_dist->svc_id == WMI_DATA_BK_SVC) || 577 (cur_ep_dist->svc_id == WMI_DATA_BE_SVC)) { 578 ath6kl_deposit_credit_to_ep(cred_info, 579 cur_ep_dist, 580 cur_ep_dist->cred_min); 581 cur_ep_dist->dist_flags |= HTC_EP_ACTIVE; 582 } 583 } 584 585 if (cur_ep_dist->svc_id == WMI_CONTROL_SVC) { 586 ath6kl_deposit_credit_to_ep(cred_info, cur_ep_dist, 587 cur_ep_dist->cred_min); 588 /* 589 * Control service is always marked active, it 590 * never goes inactive EVER. 591 */ 592 cur_ep_dist->dist_flags |= HTC_EP_ACTIVE; 593 } else if (cur_ep_dist->svc_id == WMI_DATA_BK_SVC) 594 /* this is the lowest priority data endpoint */ 595 cred_info->lowestpri_ep_dist = cur_ep_dist->list; 596 597 /* 598 * Streams have to be created (explicit | implicit) for all 599 * kinds of traffic. BE endpoints are also inactive in the 600 * beginning. When BE traffic starts it creates implicit 601 * streams that redistributes credits. 602 * 603 * Note: all other endpoints have minimums set but are 604 * initially given NO credits. credits will be distributed 605 * as traffic activity demands 606 */ 607 } 608 609 WARN_ON(cred_info->cur_free_credits <= 0); 610 611 list_for_each_entry(cur_ep_dist, ep_list, list) { 612 if (cur_ep_dist->endpoint == ENDPOINT_0) 613 continue; 614 615 if (cur_ep_dist->svc_id == WMI_CONTROL_SVC) 616 cur_ep_dist->cred_norm = cur_ep_dist->cred_per_msg; 617 else { 618 /* 619 * For the remaining data endpoints, we assume that 620 * each cred_per_msg are the same. We use a simple 621 * calculation here, we take the remaining credits 622 * and determine how many max messages this can 623 * cover and then set each endpoint's normal value 624 * equal to 3/4 this amount. 625 */ 626 count = (cred_info->cur_free_credits / 627 cur_ep_dist->cred_per_msg) 628 * cur_ep_dist->cred_per_msg; 629 count = (count * 3) >> 2; 630 count = max(count, cur_ep_dist->cred_per_msg); 631 cur_ep_dist->cred_norm = count; 632 633 } 634 } 635} 636 637/* initialize and setup credit distribution */ 638int ath6kl_setup_credit_dist(void *htc_handle, 639 struct htc_credit_state_info *cred_info) 640{ 641 u16 servicepriority[5]; 642 643 memset(cred_info, 0, sizeof(struct htc_credit_state_info)); 644 645 servicepriority[0] = WMI_CONTROL_SVC; /* highest */ 646 servicepriority[1] = WMI_DATA_VO_SVC; 647 servicepriority[2] = WMI_DATA_VI_SVC; 648 servicepriority[3] = WMI_DATA_BE_SVC; 649 servicepriority[4] = WMI_DATA_BK_SVC; /* lowest */ 650 651 /* set priority list */ 652 ath6kl_htc_set_credit_dist(htc_handle, cred_info, servicepriority, 5); 653 654 return 0; 655} 656 657/* reduce an ep's credits back to a set limit */ 658static void ath6kl_reduce_credits(struct htc_credit_state_info *cred_info, 659 struct htc_endpoint_credit_dist *ep_dist, 660 int limit) 661{ 662 int credits; 663 664 ep_dist->cred_assngd = limit; 665 666 if (ep_dist->credits <= limit) 667 return; 668 669 credits = ep_dist->credits - limit; 670 ep_dist->credits -= credits; 671 cred_info->cur_free_credits += credits; 672} 673 674static void ath6kl_credit_update(struct htc_credit_state_info *cred_info, 675 struct list_head *epdist_list) 676{ 677 struct htc_endpoint_credit_dist *cur_dist_list; 678 679 list_for_each_entry(cur_dist_list, epdist_list, list) { 680 if (cur_dist_list->endpoint == ENDPOINT_0) 681 continue; 682 683 if (cur_dist_list->cred_to_dist > 0) { 684 cur_dist_list->credits += 685 cur_dist_list->cred_to_dist; 686 cur_dist_list->cred_to_dist = 0; 687 if (cur_dist_list->credits > 688 cur_dist_list->cred_assngd) 689 ath6kl_reduce_credits(cred_info, 690 cur_dist_list, 691 cur_dist_list->cred_assngd); 692 693 if (cur_dist_list->credits > 694 cur_dist_list->cred_norm) 695 ath6kl_reduce_credits(cred_info, cur_dist_list, 696 cur_dist_list->cred_norm); 697 698 if (!(cur_dist_list->dist_flags & HTC_EP_ACTIVE)) { 699 if (cur_dist_list->txq_depth == 0) 700 ath6kl_reduce_credits(cred_info, 701 cur_dist_list, 0); 702 } 703 } 704 } 705} 706 707/* 708 * HTC has an endpoint that needs credits, ep_dist is the endpoint in 709 * question. 710 */ 711void ath6kl_seek_credits(struct htc_credit_state_info *cred_info, 712 struct htc_endpoint_credit_dist *ep_dist) 713{ 714 struct htc_endpoint_credit_dist *curdist_list; 715 int credits = 0; 716 int need; 717 718 if (ep_dist->svc_id == WMI_CONTROL_SVC) 719 goto out; 720 721 if ((ep_dist->svc_id == WMI_DATA_VI_SVC) || 722 (ep_dist->svc_id == WMI_DATA_VO_SVC)) 723 if ((ep_dist->cred_assngd >= ep_dist->cred_norm)) 724 goto out; 725 726 /* 727 * For all other services, we follow a simple algorithm of: 728 * 729 * 1. checking the free pool for credits 730 * 2. checking lower priority endpoints for credits to take 731 */ 732 733 credits = min(cred_info->cur_free_credits, ep_dist->seek_cred); 734 735 if (credits >= ep_dist->seek_cred) 736 goto out; 737 738 /* 739 * We don't have enough in the free pool, try taking away from 740 * lower priority services The rule for taking away credits: 741 * 742 * 1. Only take from lower priority endpoints 743 * 2. Only take what is allocated above the minimum (never 744 * starve an endpoint completely) 745 * 3. Only take what you need. 746 */ 747 748 list_for_each_entry_reverse(curdist_list, 749 &cred_info->lowestpri_ep_dist, 750 list) { 751 if (curdist_list == ep_dist) 752 break; 753 754 need = ep_dist->seek_cred - cred_info->cur_free_credits; 755 756 if ((curdist_list->cred_assngd - need) >= 757 curdist_list->cred_min) { 758 /* 759 * The current one has been allocated more than 760 * it's minimum and it has enough credits assigned 761 * above it's minimum to fulfill our need try to 762 * take away just enough to fulfill our need. 763 */ 764 ath6kl_reduce_credits(cred_info, curdist_list, 765 curdist_list->cred_assngd - need); 766 767 if (cred_info->cur_free_credits >= 768 ep_dist->seek_cred) 769 break; 770 } 771 772 if (curdist_list->endpoint == ENDPOINT_0) 773 break; 774 } 775 776 credits = min(cred_info->cur_free_credits, ep_dist->seek_cred); 777 778out: 779 /* did we find some credits? */ 780 if (credits) 781 ath6kl_deposit_credit_to_ep(cred_info, ep_dist, credits); 782 783 ep_dist->seek_cred = 0; 784} 785 786/* redistribute credits based on activity change */ 787static void ath6kl_redistribute_credits(struct htc_credit_state_info *info, 788 struct list_head *ep_dist_list) 789{ 790 struct htc_endpoint_credit_dist *curdist_list; 791 792 list_for_each_entry(curdist_list, ep_dist_list, list) { 793 if (curdist_list->endpoint == ENDPOINT_0) 794 continue; 795 796 if ((curdist_list->svc_id == WMI_DATA_BK_SVC) || 797 (curdist_list->svc_id == WMI_DATA_BE_SVC)) 798 curdist_list->dist_flags |= HTC_EP_ACTIVE; 799 800 if ((curdist_list->svc_id != WMI_CONTROL_SVC) && 801 !(curdist_list->dist_flags & HTC_EP_ACTIVE)) { 802 if (curdist_list->txq_depth == 0) 803 ath6kl_reduce_credits(info, curdist_list, 0); 804 else 805 ath6kl_reduce_credits(info, 806 curdist_list, 807 curdist_list->cred_min); 808 } 809 } 810} 811 812/* 813 * 814 * This function is invoked whenever endpoints require credit 815 * distributions. A lock is held while this function is invoked, this 816 * function shall NOT block. The ep_dist_list is a list of distribution 817 * structures in prioritized order as defined by the call to the 818 * htc_set_credit_dist() api. 819 */ 820void ath6kl_credit_distribute(struct htc_credit_state_info *cred_info, 821 struct list_head *ep_dist_list, 822 enum htc_credit_dist_reason reason) 823{ 824 switch (reason) { 825 case HTC_CREDIT_DIST_SEND_COMPLETE: 826 ath6kl_credit_update(cred_info, ep_dist_list); 827 break; 828 case HTC_CREDIT_DIST_ACTIVITY_CHANGE: 829 ath6kl_redistribute_credits(cred_info, ep_dist_list); 830 break; 831 default: 832 break; 833 } 834 835 WARN_ON(cred_info->cur_free_credits > cred_info->total_avail_credits); 836 WARN_ON(cred_info->cur_free_credits < 0); 837} 838 839void disconnect_timer_handler(unsigned long ptr) 840{ 841 struct net_device *dev = (struct net_device *)ptr; 842 struct ath6kl_vif *vif = netdev_priv(dev); 843 844 ath6kl_init_profile_info(vif); 845 ath6kl_disconnect(vif); 846} 847 848void ath6kl_disconnect(struct ath6kl_vif *vif) 849{ 850 if (test_bit(CONNECTED, &vif->flags) || 851 test_bit(CONNECT_PEND, &vif->flags)) { 852 ath6kl_wmi_disconnect_cmd(vif->ar->wmi, vif->fw_vif_idx); 853 /* 854 * Disconnect command is issued, clear the connect pending 855 * flag. The connected flag will be cleared in 856 * disconnect event notification. 857 */ 858 clear_bit(CONNECT_PEND, &vif->flags); 859 } 860} 861 862void ath6kl_deep_sleep_enable(struct ath6kl *ar) 863{ 864 struct ath6kl_vif *vif; 865 866 /* FIXME: for multi vif */ 867 vif = ath6kl_vif_first(ar); 868 if (!vif) { 869 /* save the current power mode before enabling power save */ 870 ar->wmi->saved_pwr_mode = ar->wmi->pwr_mode; 871 872 if (ath6kl_wmi_powermode_cmd(ar->wmi, 0, REC_POWER) != 0) 873 ath6kl_warn("ath6kl_deep_sleep_enable: " 874 "wmi_powermode_cmd failed\n"); 875 return; 876 } 877 878 switch (vif->sme_state) { 879 case SME_CONNECTING: 880 cfg80211_connect_result(vif->ndev, vif->bssid, NULL, 0, 881 NULL, 0, 882 WLAN_STATUS_UNSPECIFIED_FAILURE, 883 GFP_KERNEL); 884 break; 885 case SME_CONNECTED: 886 default: 887 /* 888 * FIXME: oddly enough smeState is in DISCONNECTED during 889 * suspend, why? Need to send disconnected event in that 890 * state. 891 */ 892 cfg80211_disconnected(vif->ndev, 0, NULL, 0, GFP_KERNEL); 893 break; 894 } 895 896 if (test_bit(CONNECTED, &vif->flags) || 897 test_bit(CONNECT_PEND, &vif->flags)) 898 ath6kl_wmi_disconnect_cmd(ar->wmi, vif->fw_vif_idx); 899 900 vif->sme_state = SME_DISCONNECTED; 901 902 /* disable scanning */ 903 if (ath6kl_wmi_scanparams_cmd(ar->wmi, vif->fw_vif_idx, 0xFFFF, 0, 0, 904 0, 0, 0, 0, 0, 0, 0) != 0) 905 printk(KERN_WARNING "ath6kl: failed to disable scan " 906 "during suspend\n"); 907 908 ath6kl_cfg80211_scan_complete_event(vif, -ECANCELED); 909 910 /* save the current power mode before enabling power save */ 911 ar->wmi->saved_pwr_mode = ar->wmi->pwr_mode; 912 913 if (ath6kl_wmi_powermode_cmd(ar->wmi, 0, REC_POWER) != 0) 914 ath6kl_warn("ath6kl_deep_sleep_enable: " 915 "wmi_powermode_cmd failed\n"); 916} 917 918/* WMI Event handlers */ 919 920static const char *get_hw_id_string(u32 id) 921{ 922 switch (id) { 923 case AR6003_REV1_VERSION: 924 return "1.0"; 925 case AR6003_REV2_VERSION: 926 return "2.0"; 927 case AR6003_REV3_VERSION: 928 return "2.1.1"; 929 default: 930 return "unknown"; 931 } 932} 933 934void ath6kl_ready_event(void *devt, u8 *datap, u32 sw_ver, u32 abi_ver) 935{ 936 struct ath6kl *ar = devt; 937 938 memcpy(ar->mac_addr, datap, ETH_ALEN); 939 ath6kl_dbg(ATH6KL_DBG_TRC, "%s: mac addr = %pM\n", 940 __func__, ar->mac_addr); 941 942 ar->version.wlan_ver = sw_ver; 943 ar->version.abi_ver = abi_ver; 944 945 snprintf(ar->wiphy->fw_version, 946 sizeof(ar->wiphy->fw_version), 947 "%u.%u.%u.%u", 948 (ar->version.wlan_ver & 0xf0000000) >> 28, 949 (ar->version.wlan_ver & 0x0f000000) >> 24, 950 (ar->version.wlan_ver & 0x00ff0000) >> 16, 951 (ar->version.wlan_ver & 0x0000ffff)); 952 953 /* indicate to the waiting thread that the ready event was received */ 954 set_bit(WMI_READY, &ar->flag); 955 wake_up(&ar->event_wq); 956 957 ath6kl_info("hw %s fw %s%s\n", 958 get_hw_id_string(ar->wiphy->hw_version), 959 ar->wiphy->fw_version, 960 test_bit(TESTMODE, &ar->flag) ? " testmode" : ""); 961} 962 963void ath6kl_scan_complete_evt(struct ath6kl_vif *vif, int status) 964{ 965 struct ath6kl *ar = vif->ar; 966 967 ath6kl_cfg80211_scan_complete_event(vif, status); 968 969 if (!ar->usr_bss_filter) { 970 clear_bit(CLEAR_BSSFILTER_ON_BEACON, &vif->flags); 971 ath6kl_wmi_bssfilter_cmd(ar->wmi, vif->fw_vif_idx, 972 NONE_BSS_FILTER, 0); 973 } 974 975 ath6kl_dbg(ATH6KL_DBG_WLAN_SCAN, "scan complete: %d\n", status); 976} 977 978void ath6kl_connect_event(struct ath6kl_vif *vif, u16 channel, u8 *bssid, 979 u16 listen_int, u16 beacon_int, 980 enum network_type net_type, u8 beacon_ie_len, 981 u8 assoc_req_len, u8 assoc_resp_len, 982 u8 *assoc_info) 983{ 984 struct ath6kl *ar = vif->ar; 985 986 ath6kl_cfg80211_connect_event(vif, channel, bssid, 987 listen_int, beacon_int, 988 net_type, beacon_ie_len, 989 assoc_req_len, assoc_resp_len, 990 assoc_info); 991 992 memcpy(vif->bssid, bssid, sizeof(vif->bssid)); 993 vif->bss_ch = channel; 994 995 if ((vif->nw_type == INFRA_NETWORK)) 996 ath6kl_wmi_listeninterval_cmd(ar->wmi, vif->fw_vif_idx, 997 ar->listen_intvl_t, 998 ar->listen_intvl_b); 999 1000 netif_wake_queue(vif->ndev); 1001 1002 /* Update connect & link status atomically */ 1003 spin_lock_bh(&vif->if_lock); 1004 set_bit(CONNECTED, &vif->flags); 1005 clear_bit(CONNECT_PEND, &vif->flags); 1006 netif_carrier_on(vif->ndev); 1007 spin_unlock_bh(&vif->if_lock); 1008 1009 aggr_reset_state(vif->aggr_cntxt); 1010 vif->reconnect_flag = 0; 1011 1012 if ((vif->nw_type == ADHOC_NETWORK) && ar->ibss_ps_enable) { 1013 memset(ar->node_map, 0, sizeof(ar->node_map)); 1014 ar->node_num = 0; 1015 ar->next_ep_id = ENDPOINT_2; 1016 } 1017 1018 if (!ar->usr_bss_filter) { 1019 set_bit(CLEAR_BSSFILTER_ON_BEACON, &vif->flags); 1020 ath6kl_wmi_bssfilter_cmd(ar->wmi, vif->fw_vif_idx, 1021 CURRENT_BSS_FILTER, 0); 1022 } 1023} 1024 1025void ath6kl_tkip_micerr_event(struct ath6kl_vif *vif, u8 keyid, bool ismcast) 1026{ 1027 struct ath6kl_sta *sta; 1028 struct ath6kl *ar = vif->ar; 1029 u8 tsc[6]; 1030 1031 /* 1032 * For AP case, keyid will have aid of STA which sent pkt with 1033 * MIC error. Use this aid to get MAC & send it to hostapd. 1034 */ 1035 if (vif->nw_type == AP_NETWORK) { 1036 sta = ath6kl_find_sta_by_aid(ar, (keyid >> 2)); 1037 if (!sta) 1038 return; 1039 1040 ath6kl_dbg(ATH6KL_DBG_TRC, 1041 "ap tkip mic error received from aid=%d\n", keyid); 1042 1043 memset(tsc, 0, sizeof(tsc)); /* FIX: get correct TSC */ 1044 cfg80211_michael_mic_failure(vif->ndev, sta->mac, 1045 NL80211_KEYTYPE_PAIRWISE, keyid, 1046 tsc, GFP_KERNEL); 1047 } else 1048 ath6kl_cfg80211_tkip_micerr_event(vif, keyid, ismcast); 1049 1050} 1051 1052static void ath6kl_update_target_stats(struct ath6kl_vif *vif, u8 *ptr, u32 len) 1053{ 1054 struct wmi_target_stats *tgt_stats = 1055 (struct wmi_target_stats *) ptr; 1056 struct ath6kl *ar = vif->ar; 1057 struct target_stats *stats = &vif->target_stats; 1058 struct tkip_ccmp_stats *ccmp_stats; 1059 u8 ac; 1060 1061 if (len < sizeof(*tgt_stats)) 1062 return; 1063 1064 ath6kl_dbg(ATH6KL_DBG_TRC, "updating target stats\n"); 1065 1066 stats->tx_pkt += le32_to_cpu(tgt_stats->stats.tx.pkt); 1067 stats->tx_byte += le32_to_cpu(tgt_stats->stats.tx.byte); 1068 stats->tx_ucast_pkt += le32_to_cpu(tgt_stats->stats.tx.ucast_pkt); 1069 stats->tx_ucast_byte += le32_to_cpu(tgt_stats->stats.tx.ucast_byte); 1070 stats->tx_mcast_pkt += le32_to_cpu(tgt_stats->stats.tx.mcast_pkt); 1071 stats->tx_mcast_byte += le32_to_cpu(tgt_stats->stats.tx.mcast_byte); 1072 stats->tx_bcast_pkt += le32_to_cpu(tgt_stats->stats.tx.bcast_pkt); 1073 stats->tx_bcast_byte += le32_to_cpu(tgt_stats->stats.tx.bcast_byte); 1074 stats->tx_rts_success_cnt += 1075 le32_to_cpu(tgt_stats->stats.tx.rts_success_cnt); 1076 1077 for (ac = 0; ac < WMM_NUM_AC; ac++) 1078 stats->tx_pkt_per_ac[ac] += 1079 le32_to_cpu(tgt_stats->stats.tx.pkt_per_ac[ac]); 1080 1081 stats->tx_err += le32_to_cpu(tgt_stats->stats.tx.err); 1082 stats->tx_fail_cnt += le32_to_cpu(tgt_stats->stats.tx.fail_cnt); 1083 stats->tx_retry_cnt += le32_to_cpu(tgt_stats->stats.tx.retry_cnt); 1084 stats->tx_mult_retry_cnt += 1085 le32_to_cpu(tgt_stats->stats.tx.mult_retry_cnt); 1086 stats->tx_rts_fail_cnt += 1087 le32_to_cpu(tgt_stats->stats.tx.rts_fail_cnt); 1088 stats->tx_ucast_rate = 1089 ath6kl_wmi_get_rate(a_sle32_to_cpu(tgt_stats->stats.tx.ucast_rate)); 1090 1091 stats->rx_pkt += le32_to_cpu(tgt_stats->stats.rx.pkt); 1092 stats->rx_byte += le32_to_cpu(tgt_stats->stats.rx.byte); 1093 stats->rx_ucast_pkt += le32_to_cpu(tgt_stats->stats.rx.ucast_pkt); 1094 stats->rx_ucast_byte += le32_to_cpu(tgt_stats->stats.rx.ucast_byte); 1095 stats->rx_mcast_pkt += le32_to_cpu(tgt_stats->stats.rx.mcast_pkt); 1096 stats->rx_mcast_byte += le32_to_cpu(tgt_stats->stats.rx.mcast_byte); 1097 stats->rx_bcast_pkt += le32_to_cpu(tgt_stats->stats.rx.bcast_pkt); 1098 stats->rx_bcast_byte += le32_to_cpu(tgt_stats->stats.rx.bcast_byte); 1099 stats->rx_frgment_pkt += le32_to_cpu(tgt_stats->stats.rx.frgment_pkt); 1100 stats->rx_err += le32_to_cpu(tgt_stats->stats.rx.err); 1101 stats->rx_crc_err += le32_to_cpu(tgt_stats->stats.rx.crc_err); 1102 stats->rx_key_cache_miss += 1103 le32_to_cpu(tgt_stats->stats.rx.key_cache_miss); 1104 stats->rx_decrypt_err += le32_to_cpu(tgt_stats->stats.rx.decrypt_err); 1105 stats->rx_dupl_frame += le32_to_cpu(tgt_stats->stats.rx.dupl_frame); 1106 stats->rx_ucast_rate = 1107 ath6kl_wmi_get_rate(a_sle32_to_cpu(tgt_stats->stats.rx.ucast_rate)); 1108 1109 ccmp_stats = &tgt_stats->stats.tkip_ccmp_stats; 1110 1111 stats->tkip_local_mic_fail += 1112 le32_to_cpu(ccmp_stats->tkip_local_mic_fail); 1113 stats->tkip_cnter_measures_invoked += 1114 le32_to_cpu(ccmp_stats->tkip_cnter_measures_invoked); 1115 stats->tkip_fmt_err += le32_to_cpu(ccmp_stats->tkip_fmt_err); 1116 1117 stats->ccmp_fmt_err += le32_to_cpu(ccmp_stats->ccmp_fmt_err); 1118 stats->ccmp_replays += le32_to_cpu(ccmp_stats->ccmp_replays); 1119 1120 stats->pwr_save_fail_cnt += 1121 le32_to_cpu(tgt_stats->pm_stats.pwr_save_failure_cnt); 1122 stats->noise_floor_calib = 1123 a_sle32_to_cpu(tgt_stats->noise_floor_calib); 1124 1125 stats->cs_bmiss_cnt += 1126 le32_to_cpu(tgt_stats->cserv_stats.cs_bmiss_cnt); 1127 stats->cs_low_rssi_cnt += 1128 le32_to_cpu(tgt_stats->cserv_stats.cs_low_rssi_cnt); 1129 stats->cs_connect_cnt += 1130 le16_to_cpu(tgt_stats->cserv_stats.cs_connect_cnt); 1131 stats->cs_discon_cnt += 1132 le16_to_cpu(tgt_stats->cserv_stats.cs_discon_cnt); 1133 1134 stats->cs_ave_beacon_rssi = 1135 a_sle16_to_cpu(tgt_stats->cserv_stats.cs_ave_beacon_rssi); 1136 1137 stats->cs_last_roam_msec = 1138 tgt_stats->cserv_stats.cs_last_roam_msec; 1139 stats->cs_snr = tgt_stats->cserv_stats.cs_snr; 1140 stats->cs_rssi = a_sle16_to_cpu(tgt_stats->cserv_stats.cs_rssi); 1141 1142 stats->lq_val = le32_to_cpu(tgt_stats->lq_val); 1143 1144 stats->wow_pkt_dropped += 1145 le32_to_cpu(tgt_stats->wow_stats.wow_pkt_dropped); 1146 stats->wow_host_pkt_wakeups += 1147 tgt_stats->wow_stats.wow_host_pkt_wakeups; 1148 stats->wow_host_evt_wakeups += 1149 tgt_stats->wow_stats.wow_host_evt_wakeups; 1150 stats->wow_evt_discarded += 1151 le16_to_cpu(tgt_stats->wow_stats.wow_evt_discarded); 1152 1153 if (test_bit(STATS_UPDATE_PEND, &vif->flags)) { 1154 clear_bit(STATS_UPDATE_PEND, &vif->flags); 1155 wake_up(&ar->event_wq); 1156 } 1157} 1158 1159static void ath6kl_add_le32(__le32 *var, __le32 val) 1160{ 1161 *var = cpu_to_le32(le32_to_cpu(*var) + le32_to_cpu(val)); 1162} 1163 1164void ath6kl_tgt_stats_event(struct ath6kl_vif *vif, u8 *ptr, u32 len) 1165{ 1166 struct wmi_ap_mode_stat *p = (struct wmi_ap_mode_stat *) ptr; 1167 struct ath6kl *ar = vif->ar; 1168 struct wmi_ap_mode_stat *ap = &ar->ap_stats; 1169 struct wmi_per_sta_stat *st_ap, *st_p; 1170 u8 ac; 1171 1172 if (vif->nw_type == AP_NETWORK) { 1173 if (len < sizeof(*p)) 1174 return; 1175 1176 for (ac = 0; ac < AP_MAX_NUM_STA; ac++) { 1177 st_ap = &ap->sta[ac]; 1178 st_p = &p->sta[ac]; 1179 1180 ath6kl_add_le32(&st_ap->tx_bytes, st_p->tx_bytes); 1181 ath6kl_add_le32(&st_ap->tx_pkts, st_p->tx_pkts); 1182 ath6kl_add_le32(&st_ap->tx_error, st_p->tx_error); 1183 ath6kl_add_le32(&st_ap->tx_discard, st_p->tx_discard); 1184 ath6kl_add_le32(&st_ap->rx_bytes, st_p->rx_bytes); 1185 ath6kl_add_le32(&st_ap->rx_pkts, st_p->rx_pkts); 1186 ath6kl_add_le32(&st_ap->rx_error, st_p->rx_error); 1187 ath6kl_add_le32(&st_ap->rx_discard, st_p->rx_discard); 1188 } 1189 1190 } else { 1191 ath6kl_update_target_stats(vif, ptr, len); 1192 } 1193} 1194 1195void ath6kl_wakeup_event(void *dev) 1196{ 1197 struct ath6kl *ar = (struct ath6kl *) dev; 1198 1199 wake_up(&ar->event_wq); 1200} 1201 1202void ath6kl_txpwr_rx_evt(void *devt, u8 tx_pwr) 1203{ 1204 struct ath6kl *ar = (struct ath6kl *) devt; 1205 1206 ar->tx_pwr = tx_pwr; 1207 wake_up(&ar->event_wq); 1208} 1209 1210void ath6kl_pspoll_event(struct ath6kl_vif *vif, u8 aid) 1211{ 1212 struct ath6kl_sta *conn; 1213 struct sk_buff *skb; 1214 bool psq_empty = false; 1215 struct ath6kl *ar = vif->ar; 1216 1217 conn = ath6kl_find_sta_by_aid(ar, aid); 1218 1219 if (!conn) 1220 return; 1221 /* 1222 * Send out a packet queued on ps queue. When the ps queue 1223 * becomes empty update the PVB for this station. 1224 */ 1225 spin_lock_bh(&conn->psq_lock); 1226 psq_empty = skb_queue_empty(&conn->psq); 1227 spin_unlock_bh(&conn->psq_lock); 1228 1229 if (psq_empty) 1230 /* TODO: Send out a NULL data frame */ 1231 return; 1232 1233 spin_lock_bh(&conn->psq_lock); 1234 skb = skb_dequeue(&conn->psq); 1235 spin_unlock_bh(&conn->psq_lock); 1236 1237 conn->sta_flags |= STA_PS_POLLED; 1238 ath6kl_data_tx(skb, vif->ndev); 1239 conn->sta_flags &= ~STA_PS_POLLED; 1240 1241 spin_lock_bh(&conn->psq_lock); 1242 psq_empty = skb_queue_empty(&conn->psq); 1243 spin_unlock_bh(&conn->psq_lock); 1244 1245 if (psq_empty) 1246 ath6kl_wmi_set_pvb_cmd(ar->wmi, vif->fw_vif_idx, conn->aid, 0); 1247} 1248 1249void ath6kl_dtimexpiry_event(struct ath6kl_vif *vif) 1250{ 1251 bool mcastq_empty = false; 1252 struct sk_buff *skb; 1253 struct ath6kl *ar = vif->ar; 1254 1255 /* 1256 * If there are no associated STAs, ignore the DTIM expiry event. 1257 * There can be potential race conditions where the last associated 1258 * STA may disconnect & before the host could clear the 'Indicate 1259 * DTIM' request to the firmware, the firmware would have just 1260 * indicated a DTIM expiry event. The race is between 'clear DTIM 1261 * expiry cmd' going from the host to the firmware & the DTIM 1262 * expiry event happening from the firmware to the host. 1263 */ 1264 if (!ar->sta_list_index) 1265 return; 1266 1267 spin_lock_bh(&ar->mcastpsq_lock); 1268 mcastq_empty = skb_queue_empty(&ar->mcastpsq); 1269 spin_unlock_bh(&ar->mcastpsq_lock); 1270 1271 if (mcastq_empty) 1272 return; 1273 1274 /* set the STA flag to dtim_expired for the frame to go out */ 1275 set_bit(DTIM_EXPIRED, &vif->flags); 1276 1277 spin_lock_bh(&ar->mcastpsq_lock); 1278 while ((skb = skb_dequeue(&ar->mcastpsq)) != NULL) { 1279 spin_unlock_bh(&ar->mcastpsq_lock); 1280 1281 ath6kl_data_tx(skb, vif->ndev); 1282 1283 spin_lock_bh(&ar->mcastpsq_lock); 1284 } 1285 spin_unlock_bh(&ar->mcastpsq_lock); 1286 1287 clear_bit(DTIM_EXPIRED, &vif->flags); 1288 1289 /* clear the LSB of the BitMapCtl field of the TIM IE */ 1290 ath6kl_wmi_set_pvb_cmd(ar->wmi, vif->fw_vif_idx, MCAST_AID, 0); 1291} 1292 1293void ath6kl_disconnect_event(struct ath6kl_vif *vif, u8 reason, u8 *bssid, 1294 u8 assoc_resp_len, u8 *assoc_info, 1295 u16 prot_reason_status) 1296{ 1297 struct ath6kl *ar = vif->ar; 1298 1299 if (vif->nw_type == AP_NETWORK) { 1300 if (!ath6kl_remove_sta(ar, bssid, prot_reason_status)) 1301 return; 1302 1303 /* if no more associated STAs, empty the mcast PS q */ 1304 if (ar->sta_list_index == 0) { 1305 spin_lock_bh(&ar->mcastpsq_lock); 1306 skb_queue_purge(&ar->mcastpsq); 1307 spin_unlock_bh(&ar->mcastpsq_lock); 1308 1309 /* clear the LSB of the TIM IE's BitMapCtl field */ 1310 if (test_bit(WMI_READY, &ar->flag)) 1311 ath6kl_wmi_set_pvb_cmd(ar->wmi, vif->fw_vif_idx, 1312 MCAST_AID, 0); 1313 } 1314 1315 if (!is_broadcast_ether_addr(bssid)) { 1316 /* send event to application */ 1317 cfg80211_del_sta(vif->ndev, bssid, GFP_KERNEL); 1318 } 1319 1320 if (memcmp(vif->ndev->dev_addr, bssid, ETH_ALEN) == 0) { 1321 memset(vif->wep_key_list, 0, sizeof(vif->wep_key_list)); 1322 clear_bit(CONNECTED, &vif->flags); 1323 } 1324 return; 1325 } 1326 1327 ath6kl_cfg80211_disconnect_event(vif, reason, bssid, 1328 assoc_resp_len, assoc_info, 1329 prot_reason_status); 1330 1331 aggr_reset_state(vif->aggr_cntxt); 1332 1333 del_timer(&vif->disconnect_timer); 1334 1335 ath6kl_dbg(ATH6KL_DBG_WLAN_CONNECT, 1336 "disconnect reason is %d\n", reason); 1337 1338 /* 1339 * If the event is due to disconnect cmd from the host, only they 1340 * the target would stop trying to connect. Under any other 1341 * condition, target would keep trying to connect. 1342 */ 1343 if (reason == DISCONNECT_CMD) { 1344 if (!ar->usr_bss_filter && test_bit(WMI_READY, &ar->flag)) 1345 ath6kl_wmi_bssfilter_cmd(ar->wmi, vif->fw_vif_idx, 1346 NONE_BSS_FILTER, 0); 1347 } else { 1348 set_bit(CONNECT_PEND, &vif->flags); 1349 if (((reason == ASSOC_FAILED) && 1350 (prot_reason_status == 0x11)) || 1351 ((reason == ASSOC_FAILED) && (prot_reason_status == 0x0) 1352 && (vif->reconnect_flag == 1))) { 1353 set_bit(CONNECTED, &vif->flags); 1354 return; 1355 } 1356 } 1357 1358 /* update connect & link status atomically */ 1359 spin_lock_bh(&vif->if_lock); 1360 clear_bit(CONNECTED, &vif->flags); 1361 netif_carrier_off(vif->ndev); 1362 spin_unlock_bh(&vif->if_lock); 1363 1364 if ((reason != CSERV_DISCONNECT) || (vif->reconnect_flag != 1)) 1365 vif->reconnect_flag = 0; 1366 1367 if (reason != CSERV_DISCONNECT) 1368 ar->user_key_ctrl = 0; 1369 1370 netif_stop_queue(vif->ndev); 1371 memset(vif->bssid, 0, sizeof(vif->bssid)); 1372 vif->bss_ch = 0; 1373 1374 ath6kl_tx_data_cleanup(ar); 1375} 1376 1377struct ath6kl_vif *ath6kl_vif_first(struct ath6kl *ar) 1378{ 1379 struct ath6kl_vif *vif; 1380 1381 spin_lock(&ar->list_lock); 1382 if (list_empty(&ar->vif_list)) { 1383 spin_unlock(&ar->list_lock); 1384 return NULL; 1385 } 1386 1387 vif = list_first_entry(&ar->vif_list, struct ath6kl_vif, list); 1388 1389 spin_unlock(&ar->list_lock); 1390 1391 return vif; 1392} 1393 1394static int ath6kl_open(struct net_device *dev) 1395{ 1396 struct ath6kl_vif *vif = netdev_priv(dev); 1397 1398 set_bit(WLAN_ENABLED, &vif->flags); 1399 1400 if (test_bit(CONNECTED, &vif->flags)) { 1401 netif_carrier_on(dev); 1402 netif_wake_queue(dev); 1403 } else 1404 netif_carrier_off(dev); 1405 1406 return 0; 1407} 1408 1409static int ath6kl_close(struct net_device *dev) 1410{ 1411 struct ath6kl *ar = ath6kl_priv(dev); 1412 struct ath6kl_vif *vif = netdev_priv(dev); 1413 1414 netif_stop_queue(dev); 1415 1416 ath6kl_disconnect(vif); 1417 1418 if (test_bit(WMI_READY, &ar->flag)) { 1419 if (ath6kl_wmi_scanparams_cmd(ar->wmi, vif->fw_vif_idx, 0xFFFF, 1420 0, 0, 0, 0, 0, 0, 0, 0, 0)) 1421 return -EIO; 1422 1423 clear_bit(WLAN_ENABLED, &vif->flags); 1424 } 1425 1426 ath6kl_cfg80211_scan_complete_event(vif, -ECANCELED); 1427 1428 return 0; 1429} 1430 1431static struct net_device_stats *ath6kl_get_stats(struct net_device *dev) 1432{ 1433 struct ath6kl_vif *vif = netdev_priv(dev); 1434 1435 return &vif->net_stats; 1436} 1437 1438static struct net_device_ops ath6kl_netdev_ops = { 1439 .ndo_open = ath6kl_open, 1440 .ndo_stop = ath6kl_close, 1441 .ndo_start_xmit = ath6kl_data_tx, 1442 .ndo_get_stats = ath6kl_get_stats, 1443}; 1444 1445void init_netdev(struct net_device *dev) 1446{ 1447 dev->netdev_ops = &ath6kl_netdev_ops; 1448 dev->destructor = free_netdev; 1449 dev->watchdog_timeo = ATH6KL_TX_TIMEOUT; 1450 1451 dev->needed_headroom = ETH_HLEN; 1452 dev->needed_headroom += sizeof(struct ath6kl_llc_snap_hdr) + 1453 sizeof(struct wmi_data_hdr) + HTC_HDR_LENGTH 1454 + WMI_MAX_TX_META_SZ + ATH6KL_HTC_ALIGN_BYTES; 1455 1456 return; 1457} 1458