1/* 2 * Marvell Wireless LAN device driver: WMM 3 * 4 * Copyright (C) 2011-2014, Marvell International Ltd. 5 * 6 * This software file (the "File") is distributed by Marvell International 7 * Ltd. under the terms of the GNU General Public License Version 2, June 1991 8 * (the "License"). You may use, redistribute and/or modify this File in 9 * accordance with the terms and conditions of the License, a copy of which 10 * is available by writing to the Free Software Foundation, Inc., 11 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the 12 * worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt. 13 * 14 * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE 16 * ARE EXPRESSLY DISCLAIMED. The License provides additional details about 17 * this warranty disclaimer. 18 */ 19 20#include "decl.h" 21#include "ioctl.h" 22#include "util.h" 23#include "fw.h" 24#include "main.h" 25#include "wmm.h" 26#include "11n.h" 27 28 29/* Maximum value FW can accept for driver delay in packet transmission */ 30#define DRV_PKT_DELAY_TO_FW_MAX 512 31 32 33#define WMM_QUEUED_PACKET_LOWER_LIMIT 180 34 35#define WMM_QUEUED_PACKET_UPPER_LIMIT 200 36 37/* Offset for TOS field in the IP header */ 38#define IPTOS_OFFSET 5 39 40static bool disable_tx_amsdu; 41module_param(disable_tx_amsdu, bool, 0644); 42 43/* WMM information IE */ 44static const u8 wmm_info_ie[] = { WLAN_EID_VENDOR_SPECIFIC, 0x07, 45 0x00, 0x50, 0xf2, 0x02, 46 0x00, 0x01, 0x00 47}; 48 49static const u8 wmm_aci_to_qidx_map[] = { WMM_AC_BE, 50 WMM_AC_BK, 51 WMM_AC_VI, 52 WMM_AC_VO 53}; 54 55static u8 tos_to_tid[] = { 56 /* TID DSCP_P2 DSCP_P1 DSCP_P0 WMM_AC */ 57 0x01, /* 0 1 0 AC_BK */ 58 0x02, /* 0 0 0 AC_BK */ 59 0x00, /* 0 0 1 AC_BE */ 60 0x03, /* 0 1 1 AC_BE */ 61 0x04, /* 1 0 0 AC_VI */ 62 0x05, /* 1 0 1 AC_VI */ 63 0x06, /* 1 1 0 AC_VO */ 64 0x07 /* 1 1 1 AC_VO */ 65}; 66 67static u8 ac_to_tid[4][2] = { {1, 2}, {0, 3}, {4, 5}, {6, 7} }; 68 69/* 70 * This function debug prints the priority parameters for a WMM AC. 71 */ 72static void 73mwifiex_wmm_ac_debug_print(const struct ieee_types_wmm_ac_parameters *ac_param) 74{ 75 const char *ac_str[] = { "BK", "BE", "VI", "VO" }; 76 77 pr_debug("info: WMM AC_%s: ACI=%d, ACM=%d, Aifsn=%d, " 78 "EcwMin=%d, EcwMax=%d, TxopLimit=%d\n", 79 ac_str[wmm_aci_to_qidx_map[(ac_param->aci_aifsn_bitmap 80 & MWIFIEX_ACI) >> 5]], 81 (ac_param->aci_aifsn_bitmap & MWIFIEX_ACI) >> 5, 82 (ac_param->aci_aifsn_bitmap & MWIFIEX_ACM) >> 4, 83 ac_param->aci_aifsn_bitmap & MWIFIEX_AIFSN, 84 ac_param->ecw_bitmap & MWIFIEX_ECW_MIN, 85 (ac_param->ecw_bitmap & MWIFIEX_ECW_MAX) >> 4, 86 le16_to_cpu(ac_param->tx_op_limit)); 87} 88 89/* 90 * This function allocates a route address list. 91 * 92 * The function also initializes the list with the provided RA. 93 */ 94static struct mwifiex_ra_list_tbl * 95mwifiex_wmm_allocate_ralist_node(struct mwifiex_adapter *adapter, const u8 *ra) 96{ 97 struct mwifiex_ra_list_tbl *ra_list; 98 99 ra_list = kzalloc(sizeof(struct mwifiex_ra_list_tbl), GFP_ATOMIC); 100 if (!ra_list) 101 return NULL; 102 103 INIT_LIST_HEAD(&ra_list->list); 104 skb_queue_head_init(&ra_list->skb_head); 105 106 memcpy(ra_list->ra, ra, ETH_ALEN); 107 108 ra_list->total_pkt_count = 0; 109 110 dev_dbg(adapter->dev, "info: allocated ra_list %p\n", ra_list); 111 112 return ra_list; 113} 114 115/* This function returns random no between 16 and 32 to be used as threshold 116 * for no of packets after which BA setup is initiated. 117 */ 118static u8 mwifiex_get_random_ba_threshold(void) 119{ 120 u32 sec, usec; 121 struct timeval ba_tstamp; 122 u8 ba_threshold; 123 124 /* setup ba_packet_threshold here random number between 125 * [BA_SETUP_PACKET_OFFSET, 126 * BA_SETUP_PACKET_OFFSET+BA_SETUP_MAX_PACKET_THRESHOLD-1] 127 */ 128 129 do_gettimeofday(&ba_tstamp); 130 sec = (ba_tstamp.tv_sec & 0xFFFF) + (ba_tstamp.tv_sec >> 16); 131 usec = (ba_tstamp.tv_usec & 0xFFFF) + (ba_tstamp.tv_usec >> 16); 132 ba_threshold = (((sec << 16) + usec) % BA_SETUP_MAX_PACKET_THRESHOLD) 133 + BA_SETUP_PACKET_OFFSET; 134 135 return ba_threshold; 136} 137 138/* 139 * This function allocates and adds a RA list for all TIDs 140 * with the given RA. 141 */ 142void mwifiex_ralist_add(struct mwifiex_private *priv, const u8 *ra) 143{ 144 int i; 145 struct mwifiex_ra_list_tbl *ra_list; 146 struct mwifiex_adapter *adapter = priv->adapter; 147 struct mwifiex_sta_node *node; 148 unsigned long flags; 149 150 151 for (i = 0; i < MAX_NUM_TID; ++i) { 152 ra_list = mwifiex_wmm_allocate_ralist_node(adapter, ra); 153 dev_dbg(adapter->dev, "info: created ra_list %p\n", ra_list); 154 155 if (!ra_list) 156 break; 157 158 ra_list->is_11n_enabled = 0; 159 ra_list->tdls_link = false; 160 ra_list->ba_status = BA_SETUP_NONE; 161 ra_list->amsdu_in_ampdu = false; 162 if (!mwifiex_queuing_ra_based(priv)) { 163 if (mwifiex_get_tdls_link_status(priv, ra) == 164 TDLS_SETUP_COMPLETE) { 165 ra_list->tdls_link = true; 166 ra_list->is_11n_enabled = 167 mwifiex_tdls_peer_11n_enabled(priv, ra); 168 } else { 169 ra_list->is_11n_enabled = IS_11N_ENABLED(priv); 170 } 171 } else { 172 spin_lock_irqsave(&priv->sta_list_spinlock, flags); 173 node = mwifiex_get_sta_entry(priv, ra); 174 ra_list->is_11n_enabled = 175 mwifiex_is_sta_11n_enabled(priv, node); 176 if (ra_list->is_11n_enabled) 177 ra_list->max_amsdu = node->max_amsdu; 178 spin_unlock_irqrestore(&priv->sta_list_spinlock, flags); 179 } 180 181 dev_dbg(adapter->dev, "data: ralist %p: is_11n_enabled=%d\n", 182 ra_list, ra_list->is_11n_enabled); 183 184 if (ra_list->is_11n_enabled) { 185 ra_list->ba_pkt_count = 0; 186 ra_list->ba_packet_thr = 187 mwifiex_get_random_ba_threshold(); 188 } 189 list_add_tail(&ra_list->list, 190 &priv->wmm.tid_tbl_ptr[i].ra_list); 191 } 192} 193 194/* 195 * This function sets the WMM queue priorities to their default values. 196 */ 197static void mwifiex_wmm_default_queue_priorities(struct mwifiex_private *priv) 198{ 199 /* Default queue priorities: VO->VI->BE->BK */ 200 priv->wmm.queue_priority[0] = WMM_AC_VO; 201 priv->wmm.queue_priority[1] = WMM_AC_VI; 202 priv->wmm.queue_priority[2] = WMM_AC_BE; 203 priv->wmm.queue_priority[3] = WMM_AC_BK; 204} 205 206/* 207 * This function map ACs to TIDs. 208 */ 209static void 210mwifiex_wmm_queue_priorities_tid(struct mwifiex_private *priv) 211{ 212 struct mwifiex_wmm_desc *wmm = &priv->wmm; 213 u8 *queue_priority = wmm->queue_priority; 214 int i; 215 216 for (i = 0; i < 4; ++i) { 217 tos_to_tid[7 - (i * 2)] = ac_to_tid[queue_priority[i]][1]; 218 tos_to_tid[6 - (i * 2)] = ac_to_tid[queue_priority[i]][0]; 219 } 220 221 for (i = 0; i < MAX_NUM_TID; ++i) 222 priv->tos_to_tid_inv[tos_to_tid[i]] = (u8)i; 223 224 atomic_set(&wmm->highest_queued_prio, HIGH_PRIO_TID); 225} 226 227/* 228 * This function initializes WMM priority queues. 229 */ 230void 231mwifiex_wmm_setup_queue_priorities(struct mwifiex_private *priv, 232 struct ieee_types_wmm_parameter *wmm_ie) 233{ 234 u16 cw_min, avg_back_off, tmp[4]; 235 u32 i, j, num_ac; 236 u8 ac_idx; 237 238 if (!wmm_ie || !priv->wmm_enabled) { 239 /* WMM is not enabled, just set the defaults and return */ 240 mwifiex_wmm_default_queue_priorities(priv); 241 return; 242 } 243 244 dev_dbg(priv->adapter->dev, "info: WMM Parameter IE: version=%d, " 245 "qos_info Parameter Set Count=%d, Reserved=%#x\n", 246 wmm_ie->vend_hdr.version, wmm_ie->qos_info_bitmap & 247 IEEE80211_WMM_IE_AP_QOSINFO_PARAM_SET_CNT_MASK, 248 wmm_ie->reserved); 249 250 for (num_ac = 0; num_ac < ARRAY_SIZE(wmm_ie->ac_params); num_ac++) { 251 u8 ecw = wmm_ie->ac_params[num_ac].ecw_bitmap; 252 u8 aci_aifsn = wmm_ie->ac_params[num_ac].aci_aifsn_bitmap; 253 cw_min = (1 << (ecw & MWIFIEX_ECW_MIN)) - 1; 254 avg_back_off = (cw_min >> 1) + (aci_aifsn & MWIFIEX_AIFSN); 255 256 ac_idx = wmm_aci_to_qidx_map[(aci_aifsn & MWIFIEX_ACI) >> 5]; 257 priv->wmm.queue_priority[ac_idx] = ac_idx; 258 tmp[ac_idx] = avg_back_off; 259 260 dev_dbg(priv->adapter->dev, 261 "info: WMM: CWmax=%d CWmin=%d Avg Back-off=%d\n", 262 (1 << ((ecw & MWIFIEX_ECW_MAX) >> 4)) - 1, 263 cw_min, avg_back_off); 264 mwifiex_wmm_ac_debug_print(&wmm_ie->ac_params[num_ac]); 265 } 266 267 /* Bubble sort */ 268 for (i = 0; i < num_ac; i++) { 269 for (j = 1; j < num_ac - i; j++) { 270 if (tmp[j - 1] > tmp[j]) { 271 swap(tmp[j - 1], tmp[j]); 272 swap(priv->wmm.queue_priority[j - 1], 273 priv->wmm.queue_priority[j]); 274 } else if (tmp[j - 1] == tmp[j]) { 275 if (priv->wmm.queue_priority[j - 1] 276 < priv->wmm.queue_priority[j]) 277 swap(priv->wmm.queue_priority[j - 1], 278 priv->wmm.queue_priority[j]); 279 } 280 } 281 } 282 283 mwifiex_wmm_queue_priorities_tid(priv); 284} 285 286/* 287 * This function evaluates whether or not an AC is to be downgraded. 288 * 289 * In case the AC is not enabled, the highest AC is returned that is 290 * enabled and does not require admission control. 291 */ 292static enum mwifiex_wmm_ac_e 293mwifiex_wmm_eval_downgrade_ac(struct mwifiex_private *priv, 294 enum mwifiex_wmm_ac_e eval_ac) 295{ 296 int down_ac; 297 enum mwifiex_wmm_ac_e ret_ac; 298 struct mwifiex_wmm_ac_status *ac_status; 299 300 ac_status = &priv->wmm.ac_status[eval_ac]; 301 302 if (!ac_status->disabled) 303 /* Okay to use this AC, its enabled */ 304 return eval_ac; 305 306 /* Setup a default return value of the lowest priority */ 307 ret_ac = WMM_AC_BK; 308 309 /* 310 * Find the highest AC that is enabled and does not require 311 * admission control. The spec disallows downgrading to an AC, 312 * which is enabled due to a completed admission control. 313 * Unadmitted traffic is not to be sent on an AC with admitted 314 * traffic. 315 */ 316 for (down_ac = WMM_AC_BK; down_ac < eval_ac; down_ac++) { 317 ac_status = &priv->wmm.ac_status[down_ac]; 318 319 if (!ac_status->disabled && !ac_status->flow_required) 320 /* AC is enabled and does not require admission 321 control */ 322 ret_ac = (enum mwifiex_wmm_ac_e) down_ac; 323 } 324 325 return ret_ac; 326} 327 328/* 329 * This function downgrades WMM priority queue. 330 */ 331void 332mwifiex_wmm_setup_ac_downgrade(struct mwifiex_private *priv) 333{ 334 int ac_val; 335 336 dev_dbg(priv->adapter->dev, "info: WMM: AC Priorities:" 337 "BK(0), BE(1), VI(2), VO(3)\n"); 338 339 if (!priv->wmm_enabled) { 340 /* WMM is not enabled, default priorities */ 341 for (ac_val = WMM_AC_BK; ac_val <= WMM_AC_VO; ac_val++) 342 priv->wmm.ac_down_graded_vals[ac_val] = 343 (enum mwifiex_wmm_ac_e) ac_val; 344 } else { 345 for (ac_val = WMM_AC_BK; ac_val <= WMM_AC_VO; ac_val++) { 346 priv->wmm.ac_down_graded_vals[ac_val] 347 = mwifiex_wmm_eval_downgrade_ac(priv, 348 (enum mwifiex_wmm_ac_e) ac_val); 349 dev_dbg(priv->adapter->dev, 350 "info: WMM: AC PRIO %d maps to %d\n", 351 ac_val, priv->wmm.ac_down_graded_vals[ac_val]); 352 } 353 } 354} 355 356/* 357 * This function converts the IP TOS field to an WMM AC 358 * Queue assignment. 359 */ 360static enum mwifiex_wmm_ac_e 361mwifiex_wmm_convert_tos_to_ac(struct mwifiex_adapter *adapter, u32 tos) 362{ 363 /* Map of TOS UP values to WMM AC */ 364 const enum mwifiex_wmm_ac_e tos_to_ac[] = { WMM_AC_BE, 365 WMM_AC_BK, 366 WMM_AC_BK, 367 WMM_AC_BE, 368 WMM_AC_VI, 369 WMM_AC_VI, 370 WMM_AC_VO, 371 WMM_AC_VO 372 }; 373 374 if (tos >= ARRAY_SIZE(tos_to_ac)) 375 return WMM_AC_BE; 376 377 return tos_to_ac[tos]; 378} 379 380/* 381 * This function evaluates a given TID and downgrades it to a lower 382 * TID if the WMM Parameter IE received from the AP indicates that the 383 * AP is disabled (due to call admission control (ACM bit). Mapping 384 * of TID to AC is taken care of internally. 385 */ 386u8 mwifiex_wmm_downgrade_tid(struct mwifiex_private *priv, u32 tid) 387{ 388 enum mwifiex_wmm_ac_e ac, ac_down; 389 u8 new_tid; 390 391 ac = mwifiex_wmm_convert_tos_to_ac(priv->adapter, tid); 392 ac_down = priv->wmm.ac_down_graded_vals[ac]; 393 394 /* Send the index to tid array, picking from the array will be 395 * taken care by dequeuing function 396 */ 397 new_tid = ac_to_tid[ac_down][tid % 2]; 398 399 return new_tid; 400} 401 402/* 403 * This function initializes the WMM state information and the 404 * WMM data path queues. 405 */ 406void 407mwifiex_wmm_init(struct mwifiex_adapter *adapter) 408{ 409 int i, j; 410 struct mwifiex_private *priv; 411 412 for (j = 0; j < adapter->priv_num; ++j) { 413 priv = adapter->priv[j]; 414 if (!priv) 415 continue; 416 417 for (i = 0; i < MAX_NUM_TID; ++i) { 418 if (!disable_tx_amsdu && 419 adapter->tx_buf_size > MWIFIEX_TX_DATA_BUF_SIZE_2K) 420 priv->aggr_prio_tbl[i].amsdu = 421 priv->tos_to_tid_inv[i]; 422 else 423 priv->aggr_prio_tbl[i].amsdu = 424 BA_STREAM_NOT_ALLOWED; 425 priv->aggr_prio_tbl[i].ampdu_ap = 426 priv->tos_to_tid_inv[i]; 427 priv->aggr_prio_tbl[i].ampdu_user = 428 priv->tos_to_tid_inv[i]; 429 } 430 431 mwifiex_set_ba_params(priv); 432 mwifiex_reset_11n_rx_seq_num(priv); 433 434 atomic_set(&priv->wmm.tx_pkts_queued, 0); 435 atomic_set(&priv->wmm.highest_queued_prio, HIGH_PRIO_TID); 436 } 437} 438 439/* 440 * This function checks if WMM Tx queue is empty. 441 */ 442int 443mwifiex_wmm_lists_empty(struct mwifiex_adapter *adapter) 444{ 445 int i; 446 struct mwifiex_private *priv; 447 448 for (i = 0; i < adapter->priv_num; ++i) { 449 priv = adapter->priv[i]; 450 if (priv && atomic_read(&priv->wmm.tx_pkts_queued)) 451 return false; 452 } 453 454 return true; 455} 456 457/* 458 * This function deletes all packets in an RA list node. 459 * 460 * The packet sent completion callback handler are called with 461 * status failure, after they are dequeued to ensure proper 462 * cleanup. The RA list node itself is freed at the end. 463 */ 464static void 465mwifiex_wmm_del_pkts_in_ralist_node(struct mwifiex_private *priv, 466 struct mwifiex_ra_list_tbl *ra_list) 467{ 468 struct mwifiex_adapter *adapter = priv->adapter; 469 struct sk_buff *skb, *tmp; 470 471 skb_queue_walk_safe(&ra_list->skb_head, skb, tmp) 472 mwifiex_write_data_complete(adapter, skb, 0, -1); 473} 474 475/* 476 * This function deletes all packets in an RA list. 477 * 478 * Each nodes in the RA list are freed individually first, and then 479 * the RA list itself is freed. 480 */ 481static void 482mwifiex_wmm_del_pkts_in_ralist(struct mwifiex_private *priv, 483 struct list_head *ra_list_head) 484{ 485 struct mwifiex_ra_list_tbl *ra_list; 486 487 list_for_each_entry(ra_list, ra_list_head, list) 488 mwifiex_wmm_del_pkts_in_ralist_node(priv, ra_list); 489} 490 491/* 492 * This function deletes all packets in all RA lists. 493 */ 494static void mwifiex_wmm_cleanup_queues(struct mwifiex_private *priv) 495{ 496 int i; 497 498 for (i = 0; i < MAX_NUM_TID; i++) 499 mwifiex_wmm_del_pkts_in_ralist(priv, &priv->wmm.tid_tbl_ptr[i]. 500 ra_list); 501 502 atomic_set(&priv->wmm.tx_pkts_queued, 0); 503 atomic_set(&priv->wmm.highest_queued_prio, HIGH_PRIO_TID); 504} 505 506/* 507 * This function deletes all route addresses from all RA lists. 508 */ 509static void mwifiex_wmm_delete_all_ralist(struct mwifiex_private *priv) 510{ 511 struct mwifiex_ra_list_tbl *ra_list, *tmp_node; 512 int i; 513 514 for (i = 0; i < MAX_NUM_TID; ++i) { 515 dev_dbg(priv->adapter->dev, 516 "info: ra_list: freeing buf for tid %d\n", i); 517 list_for_each_entry_safe(ra_list, tmp_node, 518 &priv->wmm.tid_tbl_ptr[i].ra_list, 519 list) { 520 list_del(&ra_list->list); 521 kfree(ra_list); 522 } 523 524 INIT_LIST_HEAD(&priv->wmm.tid_tbl_ptr[i].ra_list); 525 } 526} 527 528static int mwifiex_free_ack_frame(int id, void *p, void *data) 529{ 530 pr_warn("Have pending ack frames!\n"); 531 kfree_skb(p); 532 return 0; 533} 534 535/* 536 * This function cleans up the Tx and Rx queues. 537 * 538 * Cleanup includes - 539 * - All packets in RA lists 540 * - All entries in Rx reorder table 541 * - All entries in Tx BA stream table 542 * - MPA buffer (if required) 543 * - All RA lists 544 */ 545void 546mwifiex_clean_txrx(struct mwifiex_private *priv) 547{ 548 unsigned long flags; 549 struct sk_buff *skb, *tmp; 550 551 mwifiex_11n_cleanup_reorder_tbl(priv); 552 spin_lock_irqsave(&priv->wmm.ra_list_spinlock, flags); 553 554 mwifiex_wmm_cleanup_queues(priv); 555 mwifiex_11n_delete_all_tx_ba_stream_tbl(priv); 556 557 if (priv->adapter->if_ops.cleanup_mpa_buf) 558 priv->adapter->if_ops.cleanup_mpa_buf(priv->adapter); 559 560 mwifiex_wmm_delete_all_ralist(priv); 561 memcpy(tos_to_tid, ac_to_tid, sizeof(tos_to_tid)); 562 563 if (priv->adapter->if_ops.clean_pcie_ring && 564 !priv->adapter->surprise_removed) 565 priv->adapter->if_ops.clean_pcie_ring(priv->adapter); 566 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, flags); 567 568 skb_queue_walk_safe(&priv->tdls_txq, skb, tmp) 569 mwifiex_write_data_complete(priv->adapter, skb, 0, -1); 570 571 idr_for_each(&priv->ack_status_frames, mwifiex_free_ack_frame, NULL); 572 idr_destroy(&priv->ack_status_frames); 573} 574 575/* 576 * This function retrieves a particular RA list node, matching with the 577 * given TID and RA address. 578 */ 579struct mwifiex_ra_list_tbl * 580mwifiex_wmm_get_ralist_node(struct mwifiex_private *priv, u8 tid, 581 const u8 *ra_addr) 582{ 583 struct mwifiex_ra_list_tbl *ra_list; 584 585 list_for_each_entry(ra_list, &priv->wmm.tid_tbl_ptr[tid].ra_list, 586 list) { 587 if (!memcmp(ra_list->ra, ra_addr, ETH_ALEN)) 588 return ra_list; 589 } 590 591 return NULL; 592} 593 594/* 595 * This function retrieves an RA list node for a given TID and 596 * RA address pair. 597 * 598 * If no such node is found, a new node is added first and then 599 * retrieved. 600 */ 601struct mwifiex_ra_list_tbl * 602mwifiex_wmm_get_queue_raptr(struct mwifiex_private *priv, u8 tid, 603 const u8 *ra_addr) 604{ 605 struct mwifiex_ra_list_tbl *ra_list; 606 607 ra_list = mwifiex_wmm_get_ralist_node(priv, tid, ra_addr); 608 if (ra_list) 609 return ra_list; 610 mwifiex_ralist_add(priv, ra_addr); 611 612 return mwifiex_wmm_get_ralist_node(priv, tid, ra_addr); 613} 614 615/* 616 * This function deletes RA list nodes for given mac for all TIDs. 617 * Function also decrements TX pending count accordingly. 618 */ 619void 620mwifiex_wmm_del_peer_ra_list(struct mwifiex_private *priv, const u8 *ra_addr) 621{ 622 struct mwifiex_ra_list_tbl *ra_list; 623 unsigned long flags; 624 int i; 625 626 spin_lock_irqsave(&priv->wmm.ra_list_spinlock, flags); 627 628 for (i = 0; i < MAX_NUM_TID; ++i) { 629 ra_list = mwifiex_wmm_get_ralist_node(priv, i, ra_addr); 630 631 if (!ra_list) 632 continue; 633 mwifiex_wmm_del_pkts_in_ralist_node(priv, ra_list); 634 atomic_sub(ra_list->total_pkt_count, &priv->wmm.tx_pkts_queued); 635 list_del(&ra_list->list); 636 kfree(ra_list); 637 } 638 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, flags); 639} 640 641/* 642 * This function checks if a particular RA list node exists in a given TID 643 * table index. 644 */ 645int 646mwifiex_is_ralist_valid(struct mwifiex_private *priv, 647 struct mwifiex_ra_list_tbl *ra_list, int ptr_index) 648{ 649 struct mwifiex_ra_list_tbl *rlist; 650 651 list_for_each_entry(rlist, &priv->wmm.tid_tbl_ptr[ptr_index].ra_list, 652 list) { 653 if (rlist == ra_list) 654 return true; 655 } 656 657 return false; 658} 659 660/* 661 * This function adds a packet to WMM queue. 662 * 663 * In disconnected state the packet is immediately dropped and the 664 * packet send completion callback is called with status failure. 665 * 666 * Otherwise, the correct RA list node is located and the packet 667 * is queued at the list tail. 668 */ 669void 670mwifiex_wmm_add_buf_txqueue(struct mwifiex_private *priv, 671 struct sk_buff *skb) 672{ 673 struct mwifiex_adapter *adapter = priv->adapter; 674 u32 tid; 675 struct mwifiex_ra_list_tbl *ra_list; 676 u8 ra[ETH_ALEN], tid_down; 677 unsigned long flags; 678 struct list_head list_head; 679 int tdls_status = TDLS_NOT_SETUP; 680 struct ethhdr *eth_hdr = (struct ethhdr *)skb->data; 681 struct mwifiex_txinfo *tx_info = MWIFIEX_SKB_TXCB(skb); 682 683 memcpy(ra, eth_hdr->h_dest, ETH_ALEN); 684 685 if (GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_STA && 686 ISSUPP_TDLS_ENABLED(adapter->fw_cap_info)) { 687 if (ntohs(eth_hdr->h_proto) == ETH_P_TDLS) 688 dev_dbg(adapter->dev, 689 "TDLS setup packet for %pM. Don't block\n", ra); 690 else if (memcmp(priv->cfg_bssid, ra, ETH_ALEN)) 691 tdls_status = mwifiex_get_tdls_link_status(priv, ra); 692 } 693 694 if (!priv->media_connected && !mwifiex_is_skb_mgmt_frame(skb)) { 695 dev_dbg(adapter->dev, "data: drop packet in disconnect\n"); 696 mwifiex_write_data_complete(adapter, skb, 0, -1); 697 return; 698 } 699 700 tid = skb->priority; 701 702 spin_lock_irqsave(&priv->wmm.ra_list_spinlock, flags); 703 704 tid_down = mwifiex_wmm_downgrade_tid(priv, tid); 705 706 /* In case of infra as we have already created the list during 707 association we just don't have to call get_queue_raptr, we will 708 have only 1 raptr for a tid in case of infra */ 709 if (!mwifiex_queuing_ra_based(priv) && 710 !mwifiex_is_skb_mgmt_frame(skb)) { 711 switch (tdls_status) { 712 case TDLS_SETUP_COMPLETE: 713 ra_list = mwifiex_wmm_get_queue_raptr(priv, tid_down, 714 ra); 715 tx_info->flags |= MWIFIEX_BUF_FLAG_TDLS_PKT; 716 break; 717 case TDLS_SETUP_INPROGRESS: 718 skb_queue_tail(&priv->tdls_txq, skb); 719 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, 720 flags); 721 return; 722 default: 723 list_head = priv->wmm.tid_tbl_ptr[tid_down].ra_list; 724 if (!list_empty(&list_head)) 725 ra_list = list_first_entry( 726 &list_head, struct mwifiex_ra_list_tbl, 727 list); 728 else 729 ra_list = NULL; 730 break; 731 } 732 } else { 733 memcpy(ra, skb->data, ETH_ALEN); 734 if (ra[0] & 0x01 || mwifiex_is_skb_mgmt_frame(skb)) 735 eth_broadcast_addr(ra); 736 ra_list = mwifiex_wmm_get_queue_raptr(priv, tid_down, ra); 737 } 738 739 if (!ra_list) { 740 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, flags); 741 mwifiex_write_data_complete(adapter, skb, 0, -1); 742 return; 743 } 744 745 skb_queue_tail(&ra_list->skb_head, skb); 746 747 ra_list->ba_pkt_count++; 748 ra_list->total_pkt_count++; 749 750 if (atomic_read(&priv->wmm.highest_queued_prio) < 751 priv->tos_to_tid_inv[tid_down]) 752 atomic_set(&priv->wmm.highest_queued_prio, 753 priv->tos_to_tid_inv[tid_down]); 754 755 atomic_inc(&priv->wmm.tx_pkts_queued); 756 757 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, flags); 758} 759 760/* 761 * This function processes the get WMM status command response from firmware. 762 * 763 * The response may contain multiple TLVs - 764 * - AC Queue status TLVs 765 * - Current WMM Parameter IE TLV 766 * - Admission Control action frame TLVs 767 * 768 * This function parses the TLVs and then calls further specific functions 769 * to process any changes in the queue prioritize or state. 770 */ 771int mwifiex_ret_wmm_get_status(struct mwifiex_private *priv, 772 const struct host_cmd_ds_command *resp) 773{ 774 u8 *curr = (u8 *) &resp->params.get_wmm_status; 775 uint16_t resp_len = le16_to_cpu(resp->size), tlv_len; 776 bool valid = true; 777 778 struct mwifiex_ie_types_data *tlv_hdr; 779 struct mwifiex_ie_types_wmm_queue_status *tlv_wmm_qstatus; 780 struct ieee_types_wmm_parameter *wmm_param_ie = NULL; 781 struct mwifiex_wmm_ac_status *ac_status; 782 783 dev_dbg(priv->adapter->dev, "info: WMM: WMM_GET_STATUS cmdresp received: %d\n", 784 resp_len); 785 786 while ((resp_len >= sizeof(tlv_hdr->header)) && valid) { 787 tlv_hdr = (struct mwifiex_ie_types_data *) curr; 788 tlv_len = le16_to_cpu(tlv_hdr->header.len); 789 790 if (resp_len < tlv_len + sizeof(tlv_hdr->header)) 791 break; 792 793 switch (le16_to_cpu(tlv_hdr->header.type)) { 794 case TLV_TYPE_WMMQSTATUS: 795 tlv_wmm_qstatus = 796 (struct mwifiex_ie_types_wmm_queue_status *) 797 tlv_hdr; 798 dev_dbg(priv->adapter->dev, 799 "info: CMD_RESP: WMM_GET_STATUS:" 800 " QSTATUS TLV: %d, %d, %d\n", 801 tlv_wmm_qstatus->queue_index, 802 tlv_wmm_qstatus->flow_required, 803 tlv_wmm_qstatus->disabled); 804 805 ac_status = &priv->wmm.ac_status[tlv_wmm_qstatus-> 806 queue_index]; 807 ac_status->disabled = tlv_wmm_qstatus->disabled; 808 ac_status->flow_required = 809 tlv_wmm_qstatus->flow_required; 810 ac_status->flow_created = tlv_wmm_qstatus->flow_created; 811 break; 812 813 case WLAN_EID_VENDOR_SPECIFIC: 814 /* 815 * Point the regular IEEE IE 2 bytes into the Marvell IE 816 * and setup the IEEE IE type and length byte fields 817 */ 818 819 wmm_param_ie = 820 (struct ieee_types_wmm_parameter *) (curr + 821 2); 822 wmm_param_ie->vend_hdr.len = (u8) tlv_len; 823 wmm_param_ie->vend_hdr.element_id = 824 WLAN_EID_VENDOR_SPECIFIC; 825 826 dev_dbg(priv->adapter->dev, 827 "info: CMD_RESP: WMM_GET_STATUS:" 828 " WMM Parameter Set Count: %d\n", 829 wmm_param_ie->qos_info_bitmap & 830 IEEE80211_WMM_IE_AP_QOSINFO_PARAM_SET_CNT_MASK); 831 832 memcpy((u8 *) &priv->curr_bss_params.bss_descriptor. 833 wmm_ie, wmm_param_ie, 834 wmm_param_ie->vend_hdr.len + 2); 835 836 break; 837 838 default: 839 valid = false; 840 break; 841 } 842 843 curr += (tlv_len + sizeof(tlv_hdr->header)); 844 resp_len -= (tlv_len + sizeof(tlv_hdr->header)); 845 } 846 847 mwifiex_wmm_setup_queue_priorities(priv, wmm_param_ie); 848 mwifiex_wmm_setup_ac_downgrade(priv); 849 850 return 0; 851} 852 853/* 854 * Callback handler from the command module to allow insertion of a WMM TLV. 855 * 856 * If the BSS we are associating to supports WMM, this function adds the 857 * required WMM Information IE to the association request command buffer in 858 * the form of a Marvell extended IEEE IE. 859 */ 860u32 861mwifiex_wmm_process_association_req(struct mwifiex_private *priv, 862 u8 **assoc_buf, 863 struct ieee_types_wmm_parameter *wmm_ie, 864 struct ieee80211_ht_cap *ht_cap) 865{ 866 struct mwifiex_ie_types_wmm_param_set *wmm_tlv; 867 u32 ret_len = 0; 868 869 /* Null checks */ 870 if (!assoc_buf) 871 return 0; 872 if (!(*assoc_buf)) 873 return 0; 874 875 if (!wmm_ie) 876 return 0; 877 878 dev_dbg(priv->adapter->dev, 879 "info: WMM: process assoc req: bss->wmm_ie=%#x\n", 880 wmm_ie->vend_hdr.element_id); 881 882 if ((priv->wmm_required || 883 (ht_cap && (priv->adapter->config_bands & BAND_GN || 884 priv->adapter->config_bands & BAND_AN))) && 885 wmm_ie->vend_hdr.element_id == WLAN_EID_VENDOR_SPECIFIC) { 886 wmm_tlv = (struct mwifiex_ie_types_wmm_param_set *) *assoc_buf; 887 wmm_tlv->header.type = cpu_to_le16((u16) wmm_info_ie[0]); 888 wmm_tlv->header.len = cpu_to_le16((u16) wmm_info_ie[1]); 889 memcpy(wmm_tlv->wmm_ie, &wmm_info_ie[2], 890 le16_to_cpu(wmm_tlv->header.len)); 891 if (wmm_ie->qos_info_bitmap & IEEE80211_WMM_IE_AP_QOSINFO_UAPSD) 892 memcpy((u8 *) (wmm_tlv->wmm_ie 893 + le16_to_cpu(wmm_tlv->header.len) 894 - sizeof(priv->wmm_qosinfo)), 895 &priv->wmm_qosinfo, sizeof(priv->wmm_qosinfo)); 896 897 ret_len = sizeof(wmm_tlv->header) 898 + le16_to_cpu(wmm_tlv->header.len); 899 900 *assoc_buf += ret_len; 901 } 902 903 return ret_len; 904} 905 906/* 907 * This function computes the time delay in the driver queues for a 908 * given packet. 909 * 910 * When the packet is received at the OS/Driver interface, the current 911 * time is set in the packet structure. The difference between the present 912 * time and that received time is computed in this function and limited 913 * based on pre-compiled limits in the driver. 914 */ 915u8 916mwifiex_wmm_compute_drv_pkt_delay(struct mwifiex_private *priv, 917 const struct sk_buff *skb) 918{ 919 u32 queue_delay = ktime_to_ms(net_timedelta(skb->tstamp)); 920 u8 ret_val; 921 922 /* 923 * Queue delay is passed as a uint8 in units of 2ms (ms shifted 924 * by 1). Min value (other than 0) is therefore 2ms, max is 510ms. 925 * 926 * Pass max value if queue_delay is beyond the uint8 range 927 */ 928 ret_val = (u8) (min(queue_delay, priv->wmm.drv_pkt_delay_max) >> 1); 929 930 dev_dbg(priv->adapter->dev, "data: WMM: Pkt Delay: %d ms," 931 " %d ms sent to FW\n", queue_delay, ret_val); 932 933 return ret_val; 934} 935 936/* 937 * This function retrieves the highest priority RA list table pointer. 938 */ 939static struct mwifiex_ra_list_tbl * 940mwifiex_wmm_get_highest_priolist_ptr(struct mwifiex_adapter *adapter, 941 struct mwifiex_private **priv, int *tid) 942{ 943 struct mwifiex_private *priv_tmp; 944 struct mwifiex_ra_list_tbl *ptr; 945 struct mwifiex_tid_tbl *tid_ptr; 946 atomic_t *hqp; 947 unsigned long flags_ra; 948 int i, j; 949 950 /* check the BSS with highest priority first */ 951 for (j = adapter->priv_num - 1; j >= 0; --j) { 952 /* iterate over BSS with the equal priority */ 953 list_for_each_entry(adapter->bss_prio_tbl[j].bss_prio_cur, 954 &adapter->bss_prio_tbl[j].bss_prio_head, 955 list) { 956 957 priv_tmp = adapter->bss_prio_tbl[j].bss_prio_cur->priv; 958 959 if (atomic_read(&priv_tmp->wmm.tx_pkts_queued) == 0) 960 continue; 961 962 /* iterate over the WMM queues of the BSS */ 963 hqp = &priv_tmp->wmm.highest_queued_prio; 964 for (i = atomic_read(hqp); i >= LOW_PRIO_TID; --i) { 965 966 spin_lock_irqsave(&priv_tmp->wmm. 967 ra_list_spinlock, flags_ra); 968 969 tid_ptr = &(priv_tmp)->wmm. 970 tid_tbl_ptr[tos_to_tid[i]]; 971 972 /* iterate over receiver addresses */ 973 list_for_each_entry(ptr, &tid_ptr->ra_list, 974 list) { 975 976 if (!skb_queue_empty(&ptr->skb_head)) 977 /* holds both locks */ 978 goto found; 979 } 980 981 spin_unlock_irqrestore(&priv_tmp->wmm. 982 ra_list_spinlock, 983 flags_ra); 984 } 985 } 986 987 } 988 989 return NULL; 990 991found: 992 /* holds ra_list_spinlock */ 993 if (atomic_read(hqp) > i) 994 atomic_set(hqp, i); 995 spin_unlock_irqrestore(&priv_tmp->wmm.ra_list_spinlock, flags_ra); 996 997 *priv = priv_tmp; 998 *tid = tos_to_tid[i]; 999 1000 return ptr; 1001} 1002 1003/* This functions rotates ra and bss lists so packets are picked round robin. 1004 * 1005 * After a packet is successfully transmitted, rotate the ra list, so the ra 1006 * next to the one transmitted, will come first in the list. This way we pick 1007 * the ra' in a round robin fashion. Same applies to bss nodes of equal 1008 * priority. 1009 * 1010 * Function also increments wmm.packets_out counter. 1011 */ 1012void mwifiex_rotate_priolists(struct mwifiex_private *priv, 1013 struct mwifiex_ra_list_tbl *ra, 1014 int tid) 1015{ 1016 struct mwifiex_adapter *adapter = priv->adapter; 1017 struct mwifiex_bss_prio_tbl *tbl = adapter->bss_prio_tbl; 1018 struct mwifiex_tid_tbl *tid_ptr = &priv->wmm.tid_tbl_ptr[tid]; 1019 unsigned long flags; 1020 1021 spin_lock_irqsave(&tbl[priv->bss_priority].bss_prio_lock, flags); 1022 /* 1023 * dirty trick: we remove 'head' temporarily and reinsert it after 1024 * curr bss node. imagine list to stay fixed while head is moved 1025 */ 1026 list_move(&tbl[priv->bss_priority].bss_prio_head, 1027 &tbl[priv->bss_priority].bss_prio_cur->list); 1028 spin_unlock_irqrestore(&tbl[priv->bss_priority].bss_prio_lock, flags); 1029 1030 spin_lock_irqsave(&priv->wmm.ra_list_spinlock, flags); 1031 if (mwifiex_is_ralist_valid(priv, ra, tid)) { 1032 priv->wmm.packets_out[tid]++; 1033 /* same as above */ 1034 list_move(&tid_ptr->ra_list, &ra->list); 1035 } 1036 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, flags); 1037} 1038 1039/* 1040 * This function checks if 11n aggregation is possible. 1041 */ 1042static int 1043mwifiex_is_11n_aggragation_possible(struct mwifiex_private *priv, 1044 struct mwifiex_ra_list_tbl *ptr, 1045 int max_buf_size) 1046{ 1047 int count = 0, total_size = 0; 1048 struct sk_buff *skb, *tmp; 1049 int max_amsdu_size; 1050 1051 if (priv->bss_role == MWIFIEX_BSS_ROLE_UAP && priv->ap_11n_enabled && 1052 ptr->is_11n_enabled) 1053 max_amsdu_size = min_t(int, ptr->max_amsdu, max_buf_size); 1054 else 1055 max_amsdu_size = max_buf_size; 1056 1057 skb_queue_walk_safe(&ptr->skb_head, skb, tmp) { 1058 total_size += skb->len; 1059 if (total_size >= max_amsdu_size) 1060 break; 1061 if (++count >= MIN_NUM_AMSDU) 1062 return true; 1063 } 1064 1065 return false; 1066} 1067 1068/* 1069 * This function sends a single packet to firmware for transmission. 1070 */ 1071static void 1072mwifiex_send_single_packet(struct mwifiex_private *priv, 1073 struct mwifiex_ra_list_tbl *ptr, int ptr_index, 1074 unsigned long ra_list_flags) 1075 __releases(&priv->wmm.ra_list_spinlock) 1076{ 1077 struct sk_buff *skb, *skb_next; 1078 struct mwifiex_tx_param tx_param; 1079 struct mwifiex_adapter *adapter = priv->adapter; 1080 struct mwifiex_txinfo *tx_info; 1081 1082 if (skb_queue_empty(&ptr->skb_head)) { 1083 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, 1084 ra_list_flags); 1085 dev_dbg(adapter->dev, "data: nothing to send\n"); 1086 return; 1087 } 1088 1089 skb = skb_dequeue(&ptr->skb_head); 1090 1091 tx_info = MWIFIEX_SKB_TXCB(skb); 1092 dev_dbg(adapter->dev, "data: dequeuing the packet %p %p\n", ptr, skb); 1093 1094 ptr->total_pkt_count--; 1095 1096 if (!skb_queue_empty(&ptr->skb_head)) 1097 skb_next = skb_peek(&ptr->skb_head); 1098 else 1099 skb_next = NULL; 1100 1101 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, ra_list_flags); 1102 1103 tx_param.next_pkt_len = ((skb_next) ? skb_next->len + 1104 sizeof(struct txpd) : 0); 1105 1106 if (mwifiex_process_tx(priv, skb, &tx_param) == -EBUSY) { 1107 /* Queue the packet back at the head */ 1108 spin_lock_irqsave(&priv->wmm.ra_list_spinlock, ra_list_flags); 1109 1110 if (!mwifiex_is_ralist_valid(priv, ptr, ptr_index)) { 1111 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, 1112 ra_list_flags); 1113 mwifiex_write_data_complete(adapter, skb, 0, -1); 1114 return; 1115 } 1116 1117 skb_queue_tail(&ptr->skb_head, skb); 1118 1119 ptr->total_pkt_count++; 1120 ptr->ba_pkt_count++; 1121 tx_info->flags |= MWIFIEX_BUF_FLAG_REQUEUED_PKT; 1122 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, 1123 ra_list_flags); 1124 } else { 1125 mwifiex_rotate_priolists(priv, ptr, ptr_index); 1126 atomic_dec(&priv->wmm.tx_pkts_queued); 1127 } 1128} 1129 1130/* 1131 * This function checks if the first packet in the given RA list 1132 * is already processed or not. 1133 */ 1134static int 1135mwifiex_is_ptr_processed(struct mwifiex_private *priv, 1136 struct mwifiex_ra_list_tbl *ptr) 1137{ 1138 struct sk_buff *skb; 1139 struct mwifiex_txinfo *tx_info; 1140 1141 if (skb_queue_empty(&ptr->skb_head)) 1142 return false; 1143 1144 skb = skb_peek(&ptr->skb_head); 1145 1146 tx_info = MWIFIEX_SKB_TXCB(skb); 1147 if (tx_info->flags & MWIFIEX_BUF_FLAG_REQUEUED_PKT) 1148 return true; 1149 1150 return false; 1151} 1152 1153/* 1154 * This function sends a single processed packet to firmware for 1155 * transmission. 1156 */ 1157static void 1158mwifiex_send_processed_packet(struct mwifiex_private *priv, 1159 struct mwifiex_ra_list_tbl *ptr, int ptr_index, 1160 unsigned long ra_list_flags) 1161 __releases(&priv->wmm.ra_list_spinlock) 1162{ 1163 struct mwifiex_tx_param tx_param; 1164 struct mwifiex_adapter *adapter = priv->adapter; 1165 int ret = -1; 1166 struct sk_buff *skb, *skb_next; 1167 struct mwifiex_txinfo *tx_info; 1168 1169 if (skb_queue_empty(&ptr->skb_head)) { 1170 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, 1171 ra_list_flags); 1172 return; 1173 } 1174 1175 skb = skb_dequeue(&ptr->skb_head); 1176 1177 if (adapter->data_sent || adapter->tx_lock_flag) { 1178 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, 1179 ra_list_flags); 1180 skb_queue_tail(&adapter->tx_data_q, skb); 1181 atomic_inc(&adapter->tx_queued); 1182 return; 1183 } 1184 1185 if (!skb_queue_empty(&ptr->skb_head)) 1186 skb_next = skb_peek(&ptr->skb_head); 1187 else 1188 skb_next = NULL; 1189 1190 tx_info = MWIFIEX_SKB_TXCB(skb); 1191 1192 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, ra_list_flags); 1193 1194 if (adapter->iface_type == MWIFIEX_USB) { 1195 adapter->data_sent = true; 1196 ret = adapter->if_ops.host_to_card(adapter, MWIFIEX_USB_EP_DATA, 1197 skb, NULL); 1198 } else { 1199 tx_param.next_pkt_len = 1200 ((skb_next) ? skb_next->len + 1201 sizeof(struct txpd) : 0); 1202 ret = adapter->if_ops.host_to_card(adapter, MWIFIEX_TYPE_DATA, 1203 skb, &tx_param); 1204 } 1205 1206 switch (ret) { 1207 case -EBUSY: 1208 dev_dbg(adapter->dev, "data: -EBUSY is returned\n"); 1209 spin_lock_irqsave(&priv->wmm.ra_list_spinlock, ra_list_flags); 1210 1211 if (!mwifiex_is_ralist_valid(priv, ptr, ptr_index)) { 1212 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, 1213 ra_list_flags); 1214 mwifiex_write_data_complete(adapter, skb, 0, -1); 1215 return; 1216 } 1217 1218 skb_queue_tail(&ptr->skb_head, skb); 1219 1220 tx_info->flags |= MWIFIEX_BUF_FLAG_REQUEUED_PKT; 1221 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, 1222 ra_list_flags); 1223 break; 1224 case -1: 1225 if (adapter->iface_type != MWIFIEX_PCIE) 1226 adapter->data_sent = false; 1227 dev_err(adapter->dev, "host_to_card failed: %#x\n", ret); 1228 adapter->dbg.num_tx_host_to_card_failure++; 1229 mwifiex_write_data_complete(adapter, skb, 0, ret); 1230 break; 1231 case -EINPROGRESS: 1232 if (adapter->iface_type != MWIFIEX_PCIE) 1233 adapter->data_sent = false; 1234 break; 1235 case 0: 1236 mwifiex_write_data_complete(adapter, skb, 0, ret); 1237 default: 1238 break; 1239 } 1240 if (ret != -EBUSY) { 1241 mwifiex_rotate_priolists(priv, ptr, ptr_index); 1242 atomic_dec(&priv->wmm.tx_pkts_queued); 1243 } 1244} 1245 1246/* 1247 * This function dequeues a packet from the highest priority list 1248 * and transmits it. 1249 */ 1250static int 1251mwifiex_dequeue_tx_packet(struct mwifiex_adapter *adapter) 1252{ 1253 struct mwifiex_ra_list_tbl *ptr; 1254 struct mwifiex_private *priv = NULL; 1255 int ptr_index = 0; 1256 u8 ra[ETH_ALEN]; 1257 int tid_del = 0, tid = 0; 1258 unsigned long flags; 1259 1260 ptr = mwifiex_wmm_get_highest_priolist_ptr(adapter, &priv, &ptr_index); 1261 if (!ptr) 1262 return -1; 1263 1264 tid = mwifiex_get_tid(ptr); 1265 1266 dev_dbg(adapter->dev, "data: tid=%d\n", tid); 1267 1268 spin_lock_irqsave(&priv->wmm.ra_list_spinlock, flags); 1269 if (!mwifiex_is_ralist_valid(priv, ptr, ptr_index)) { 1270 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, flags); 1271 return -1; 1272 } 1273 1274 if (mwifiex_is_ptr_processed(priv, ptr)) { 1275 mwifiex_send_processed_packet(priv, ptr, ptr_index, flags); 1276 /* ra_list_spinlock has been freed in 1277 mwifiex_send_processed_packet() */ 1278 return 0; 1279 } 1280 1281 if (!ptr->is_11n_enabled || 1282 ptr->ba_status || 1283 priv->wps.session_enable) { 1284 if (ptr->is_11n_enabled && 1285 ptr->ba_status && 1286 ptr->amsdu_in_ampdu && 1287 mwifiex_is_amsdu_allowed(priv, tid) && 1288 mwifiex_is_11n_aggragation_possible(priv, ptr, 1289 adapter->tx_buf_size)) 1290 mwifiex_11n_aggregate_pkt(priv, ptr, ptr_index, flags); 1291 /* ra_list_spinlock has been freed in 1292 * mwifiex_11n_aggregate_pkt() 1293 */ 1294 else 1295 mwifiex_send_single_packet(priv, ptr, ptr_index, flags); 1296 /* ra_list_spinlock has been freed in 1297 * mwifiex_send_single_packet() 1298 */ 1299 } else { 1300 if (mwifiex_is_ampdu_allowed(priv, ptr, tid) && 1301 ptr->ba_pkt_count > ptr->ba_packet_thr) { 1302 if (mwifiex_space_avail_for_new_ba_stream(adapter)) { 1303 mwifiex_create_ba_tbl(priv, ptr->ra, tid, 1304 BA_SETUP_INPROGRESS); 1305 mwifiex_send_addba(priv, tid, ptr->ra); 1306 } else if (mwifiex_find_stream_to_delete 1307 (priv, tid, &tid_del, ra)) { 1308 mwifiex_create_ba_tbl(priv, ptr->ra, tid, 1309 BA_SETUP_INPROGRESS); 1310 mwifiex_send_delba(priv, tid_del, ra, 1); 1311 } 1312 } 1313 if (mwifiex_is_amsdu_allowed(priv, tid) && 1314 mwifiex_is_11n_aggragation_possible(priv, ptr, 1315 adapter->tx_buf_size)) 1316 mwifiex_11n_aggregate_pkt(priv, ptr, ptr_index, flags); 1317 /* ra_list_spinlock has been freed in 1318 mwifiex_11n_aggregate_pkt() */ 1319 else 1320 mwifiex_send_single_packet(priv, ptr, ptr_index, flags); 1321 /* ra_list_spinlock has been freed in 1322 mwifiex_send_single_packet() */ 1323 } 1324 return 0; 1325} 1326 1327/* 1328 * This function transmits the highest priority packet awaiting in the 1329 * WMM Queues. 1330 */ 1331void 1332mwifiex_wmm_process_tx(struct mwifiex_adapter *adapter) 1333{ 1334 do { 1335 if (mwifiex_dequeue_tx_packet(adapter)) 1336 break; 1337 if (adapter->iface_type != MWIFIEX_SDIO) { 1338 if (adapter->data_sent || 1339 adapter->tx_lock_flag) 1340 break; 1341 } else { 1342 if (atomic_read(&adapter->tx_queued) >= 1343 MWIFIEX_MAX_PKTS_TXQ) 1344 break; 1345 } 1346 } while (!mwifiex_wmm_lists_empty(adapter)); 1347} 1348