wmm.c 35.6 KB
Newer Older
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89
/*
 * Marvell Wireless LAN device driver: WMM
 *
 * Copyright (C) 2011, Marvell International Ltd.
 *
 * This software file (the "File") is distributed by Marvell International
 * Ltd. under the terms of the GNU General Public License Version 2, June 1991
 * (the "License").  You may use, redistribute and/or modify this File in
 * accordance with the terms and conditions of the License, a copy of which
 * is available by writing to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or on the
 * worldwide web at http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt.
 *
 * THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE
 * ARE EXPRESSLY DISCLAIMED.  The License provides additional details about
 * this warranty disclaimer.
 */

#include "decl.h"
#include "ioctl.h"
#include "util.h"
#include "fw.h"
#include "main.h"
#include "wmm.h"
#include "11n.h"


/* Maximum value FW can accept for driver delay in packet transmission */
#define DRV_PKT_DELAY_TO_FW_MAX   512


#define WMM_QUEUED_PACKET_LOWER_LIMIT   180

#define WMM_QUEUED_PACKET_UPPER_LIMIT   200

/* Offset for TOS field in the IP header */
#define IPTOS_OFFSET 5

/* WMM information IE */
static const u8 wmm_info_ie[] = { WLAN_EID_VENDOR_SPECIFIC, 0x07,
	0x00, 0x50, 0xf2, 0x02,
	0x00, 0x01, 0x00
};

static const u8 wmm_aci_to_qidx_map[] = { WMM_AC_BE,
	WMM_AC_BK,
	WMM_AC_VI,
	WMM_AC_VO
};

static u8 tos_to_tid[] = {
	/* TID DSCP_P2 DSCP_P1 DSCP_P0 WMM_AC */
	0x01,			/* 0 1 0 AC_BK */
	0x02,			/* 0 0 0 AC_BK */
	0x00,			/* 0 0 1 AC_BE */
	0x03,			/* 0 1 1 AC_BE */
	0x04,			/* 1 0 0 AC_VI */
	0x05,			/* 1 0 1 AC_VI */
	0x06,			/* 1 1 0 AC_VO */
	0x07			/* 1 1 1 AC_VO */
};

/*
 * This table inverses the tos_to_tid operation to get a priority
 * which is in sequential order, and can be compared.
 * Use this to compare the priority of two different TIDs.
 */
static u8 tos_to_tid_inv[] = {
	0x02,  /* from tos_to_tid[2] = 0 */
	0x00,  /* from tos_to_tid[0] = 1 */
	0x01,  /* from tos_to_tid[1] = 2 */
	0x03,
	0x04,
	0x05,
	0x06,
	0x07};

static u8 ac_to_tid[4][2] = { {1, 2}, {0, 3}, {4, 5}, {6, 7} };

/*
 * This function debug prints the priority parameters for a WMM AC.
 */
static void
mwifiex_wmm_ac_debug_print(const struct ieee_types_wmm_ac_parameters *ac_param)
{
	const char *ac_str[] = { "BK", "BE", "VI", "VO" };

	pr_debug("info: WMM AC_%s: ACI=%d, ACM=%d, Aifsn=%d, "
90 91 92 93 94 95 96 97 98
		 "EcwMin=%d, EcwMax=%d, TxopLimit=%d\n",
		 ac_str[wmm_aci_to_qidx_map[(ac_param->aci_aifsn_bitmap
					     & MWIFIEX_ACI) >> 5]],
		 (ac_param->aci_aifsn_bitmap & MWIFIEX_ACI) >> 5,
		 (ac_param->aci_aifsn_bitmap & MWIFIEX_ACM) >> 4,
		 ac_param->aci_aifsn_bitmap & MWIFIEX_AIFSN,
		 ac_param->ecw_bitmap & MWIFIEX_ECW_MIN,
		 (ac_param->ecw_bitmap & MWIFIEX_ECW_MAX) >> 4,
		 le16_to_cpu(ac_param->tx_op_limit));
99 100 101 102 103 104 105 106 107 108 109 110 111
}

/*
 * This function allocates a route address list.
 *
 * The function also initializes the list with the provided RA.
 */
static struct mwifiex_ra_list_tbl *
mwifiex_wmm_allocate_ralist_node(struct mwifiex_adapter *adapter, u8 *ra)
{
	struct mwifiex_ra_list_tbl *ra_list;

	ra_list = kzalloc(sizeof(struct mwifiex_ra_list_tbl), GFP_ATOMIC);
112
	if (!ra_list)
113
		return NULL;
114

115 116 117 118 119 120 121 122 123 124 125 126
	INIT_LIST_HEAD(&ra_list->list);
	skb_queue_head_init(&ra_list->skb_head);

	memcpy(ra_list->ra, ra, ETH_ALEN);

	ra_list->total_pkts_size = 0;

	dev_dbg(adapter->dev, "info: allocated ra_list %p\n", ra_list);

	return ra_list;
}

127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149
/* This function returns random no between 16 and 32 to be used as threshold
 * for no of packets after which BA setup is initiated.
 */
static u8 mwifiex_get_random_ba_threshold(void)
{
	u32 sec, usec;
	struct timeval ba_tstamp;
	u8 ba_threshold;

	/* setup ba_packet_threshold here random number between
	 * [BA_SETUP_PACKET_OFFSET,
	 * BA_SETUP_PACKET_OFFSET+BA_SETUP_MAX_PACKET_THRESHOLD-1]
	 */

	do_gettimeofday(&ba_tstamp);
	sec = (ba_tstamp.tv_sec & 0xFFFF) + (ba_tstamp.tv_sec >> 16);
	usec = (ba_tstamp.tv_usec & 0xFFFF) + (ba_tstamp.tv_usec >> 16);
	ba_threshold = (((sec << 16) + usec) % BA_SETUP_MAX_PACKET_THRESHOLD)
						      + BA_SETUP_PACKET_OFFSET;

	return ba_threshold;
}

150 151 152 153 154 155 156 157 158 159
/*
 * This function allocates and adds a RA list for all TIDs
 * with the given RA.
 */
void
mwifiex_ralist_add(struct mwifiex_private *priv, u8 *ra)
{
	int i;
	struct mwifiex_ra_list_tbl *ra_list;
	struct mwifiex_adapter *adapter = priv->adapter;
160 161 162 163 164 165
	struct mwifiex_sta_node *node;
	unsigned long flags;

	spin_lock_irqsave(&priv->sta_list_spinlock, flags);
	node = mwifiex_get_sta_entry(priv, ra);
	spin_unlock_irqrestore(&priv->sta_list_spinlock, flags);
166 167 168 169 170 171 172 173

	for (i = 0; i < MAX_NUM_TID; ++i) {
		ra_list = mwifiex_wmm_allocate_ralist_node(adapter, ra);
		dev_dbg(adapter->dev, "info: created ra_list %p\n", ra_list);

		if (!ra_list)
			break;

174 175
		ra_list->is_11n_enabled = 0;
		if (!mwifiex_queuing_ra_based(priv)) {
176
			ra_list->is_11n_enabled = IS_11N_ENABLED(priv);
177 178 179 180 181 182
		} else {
			ra_list->is_11n_enabled =
				      mwifiex_is_sta_11n_enabled(priv, node);
			if (ra_list->is_11n_enabled)
				ra_list->max_amsdu = node->max_amsdu;
		}
183 184 185 186

		dev_dbg(adapter->dev, "data: ralist %p: is_11n_enabled=%d\n",
			ra_list, ra_list->is_11n_enabled);

187 188 189 190 191
		if (ra_list->is_11n_enabled) {
			ra_list->pkt_count = 0;
			ra_list->ba_packet_thr =
					      mwifiex_get_random_ba_threshold();
		}
192
		list_add_tail(&ra_list->list,
193
			      &priv->wmm.tid_tbl_ptr[i].ra_list);
194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215

		if (!priv->wmm.tid_tbl_ptr[i].ra_list_curr)
			priv->wmm.tid_tbl_ptr[i].ra_list_curr = ra_list;
	}
}

/*
 * This function sets the WMM queue priorities to their default values.
 */
static void mwifiex_wmm_default_queue_priorities(struct mwifiex_private *priv)
{
	/* Default queue priorities: VO->VI->BE->BK */
	priv->wmm.queue_priority[0] = WMM_AC_VO;
	priv->wmm.queue_priority[1] = WMM_AC_VI;
	priv->wmm.queue_priority[2] = WMM_AC_BE;
	priv->wmm.queue_priority[3] = WMM_AC_BK;
}

/*
 * This function map ACs to TIDs.
 */
static void
216
mwifiex_wmm_queue_priorities_tid(struct mwifiex_wmm_desc *wmm)
217
{
218
	u8 *queue_priority = wmm->queue_priority;
219 220 221 222 223 224
	int i;

	for (i = 0; i < 4; ++i) {
		tos_to_tid[7 - (i * 2)] = ac_to_tid[queue_priority[i]][1];
		tos_to_tid[6 - (i * 2)] = ac_to_tid[queue_priority[i]][0];
	}
225 226 227 228 229

	for (i = 0; i < MAX_NUM_TID; ++i)
		tos_to_tid_inv[tos_to_tid[i]] = (u8)i;

	atomic_set(&wmm->highest_queued_prio, HIGH_PRIO_TID);
230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255
}

/*
 * This function initializes WMM priority queues.
 */
void
mwifiex_wmm_setup_queue_priorities(struct mwifiex_private *priv,
				   struct ieee_types_wmm_parameter *wmm_ie)
{
	u16 cw_min, avg_back_off, tmp[4];
	u32 i, j, num_ac;
	u8 ac_idx;

	if (!wmm_ie || !priv->wmm_enabled) {
		/* WMM is not enabled, just set the defaults and return */
		mwifiex_wmm_default_queue_priorities(priv);
		return;
	}

	dev_dbg(priv->adapter->dev, "info: WMM Parameter IE: version=%d, "
		"qos_info Parameter Set Count=%d, Reserved=%#x\n",
		wmm_ie->vend_hdr.version, wmm_ie->qos_info_bitmap &
		IEEE80211_WMM_IE_AP_QOSINFO_PARAM_SET_CNT_MASK,
		wmm_ie->reserved);

	for (num_ac = 0; num_ac < ARRAY_SIZE(wmm_ie->ac_params); num_ac++) {
256 257 258 259 260 261
		u8 ecw = wmm_ie->ac_params[num_ac].ecw_bitmap;
		u8 aci_aifsn = wmm_ie->ac_params[num_ac].aci_aifsn_bitmap;
		cw_min = (1 << (ecw & MWIFIEX_ECW_MIN)) - 1;
		avg_back_off = (cw_min >> 1) + (aci_aifsn & MWIFIEX_AIFSN);

		ac_idx = wmm_aci_to_qidx_map[(aci_aifsn & MWIFIEX_ACI) >> 5];
262 263 264
		priv->wmm.queue_priority[ac_idx] = ac_idx;
		tmp[ac_idx] = avg_back_off;

265 266 267 268
		dev_dbg(priv->adapter->dev,
			"info: WMM: CWmax=%d CWmin=%d Avg Back-off=%d\n",
			(1 << ((ecw & MWIFIEX_ECW_MAX) >> 4)) - 1,
			cw_min, avg_back_off);
269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287
		mwifiex_wmm_ac_debug_print(&wmm_ie->ac_params[num_ac]);
	}

	/* Bubble sort */
	for (i = 0; i < num_ac; i++) {
		for (j = 1; j < num_ac - i; j++) {
			if (tmp[j - 1] > tmp[j]) {
				swap(tmp[j - 1], tmp[j]);
				swap(priv->wmm.queue_priority[j - 1],
				     priv->wmm.queue_priority[j]);
			} else if (tmp[j - 1] == tmp[j]) {
				if (priv->wmm.queue_priority[j - 1]
				    < priv->wmm.queue_priority[j])
					swap(priv->wmm.queue_priority[j - 1],
					     priv->wmm.queue_priority[j]);
			}
		}
	}

288
	mwifiex_wmm_queue_priorities_tid(&priv->wmm);
289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347
}

/*
 * This function evaluates whether or not an AC is to be downgraded.
 *
 * In case the AC is not enabled, the highest AC is returned that is
 * enabled and does not require admission control.
 */
static enum mwifiex_wmm_ac_e
mwifiex_wmm_eval_downgrade_ac(struct mwifiex_private *priv,
			      enum mwifiex_wmm_ac_e eval_ac)
{
	int down_ac;
	enum mwifiex_wmm_ac_e ret_ac;
	struct mwifiex_wmm_ac_status *ac_status;

	ac_status = &priv->wmm.ac_status[eval_ac];

	if (!ac_status->disabled)
		/* Okay to use this AC, its enabled */
		return eval_ac;

	/* Setup a default return value of the lowest priority */
	ret_ac = WMM_AC_BK;

	/*
	 *  Find the highest AC that is enabled and does not require
	 *  admission control. The spec disallows downgrading to an AC,
	 *  which is enabled due to a completed admission control.
	 *  Unadmitted traffic is not to be sent on an AC with admitted
	 *  traffic.
	 */
	for (down_ac = WMM_AC_BK; down_ac < eval_ac; down_ac++) {
		ac_status = &priv->wmm.ac_status[down_ac];

		if (!ac_status->disabled && !ac_status->flow_required)
			/* AC is enabled and does not require admission
			   control */
			ret_ac = (enum mwifiex_wmm_ac_e) down_ac;
	}

	return ret_ac;
}

/*
 * This function downgrades WMM priority queue.
 */
void
mwifiex_wmm_setup_ac_downgrade(struct mwifiex_private *priv)
{
	int ac_val;

	dev_dbg(priv->adapter->dev, "info: WMM: AC Priorities:"
			"BK(0), BE(1), VI(2), VO(3)\n");

	if (!priv->wmm_enabled) {
		/* WMM is not enabled, default priorities */
		for (ac_val = WMM_AC_BK; ac_val <= WMM_AC_VO; ac_val++)
			priv->wmm.ac_down_graded_vals[ac_val] =
348
						(enum mwifiex_wmm_ac_e) ac_val;
349 350 351 352 353
	} else {
		for (ac_val = WMM_AC_BK; ac_val <= WMM_AC_VO; ac_val++) {
			priv->wmm.ac_down_graded_vals[ac_val]
				= mwifiex_wmm_eval_downgrade_ac(priv,
						(enum mwifiex_wmm_ac_e) ac_val);
354 355
			dev_dbg(priv->adapter->dev,
				"info: WMM: AC PRIO %d maps to %d\n",
356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430
				ac_val, priv->wmm.ac_down_graded_vals[ac_val]);
		}
	}
}

/*
 * This function converts the IP TOS field to an WMM AC
 * Queue assignment.
 */
static enum mwifiex_wmm_ac_e
mwifiex_wmm_convert_tos_to_ac(struct mwifiex_adapter *adapter, u32 tos)
{
	/* Map of TOS UP values to WMM AC */
	const enum mwifiex_wmm_ac_e tos_to_ac[] = { WMM_AC_BE,
		WMM_AC_BK,
		WMM_AC_BK,
		WMM_AC_BE,
		WMM_AC_VI,
		WMM_AC_VI,
		WMM_AC_VO,
		WMM_AC_VO
	};

	if (tos >= ARRAY_SIZE(tos_to_ac))
		return WMM_AC_BE;

	return tos_to_ac[tos];
}

/*
 * This function evaluates a given TID and downgrades it to a lower
 * TID if the WMM Parameter IE received from the AP indicates that the
 * AP is disabled (due to call admission control (ACM bit). Mapping
 * of TID to AC is taken care of internally.
 */
static u8
mwifiex_wmm_downgrade_tid(struct mwifiex_private *priv, u32 tid)
{
	enum mwifiex_wmm_ac_e ac, ac_down;
	u8 new_tid;

	ac = mwifiex_wmm_convert_tos_to_ac(priv->adapter, tid);
	ac_down = priv->wmm.ac_down_graded_vals[ac];

	/* Send the index to tid array, picking from the array will be
	 * taken care by dequeuing function
	 */
	new_tid = ac_to_tid[ac_down][tid % 2];

	return new_tid;
}

/*
 * This function initializes the WMM state information and the
 * WMM data path queues.
 */
void
mwifiex_wmm_init(struct mwifiex_adapter *adapter)
{
	int i, j;
	struct mwifiex_private *priv;

	for (j = 0; j < adapter->priv_num; ++j) {
		priv = adapter->priv[j];
		if (!priv)
			continue;

		for (i = 0; i < MAX_NUM_TID; ++i) {
			priv->aggr_prio_tbl[i].amsdu = tos_to_tid_inv[i];
			priv->aggr_prio_tbl[i].ampdu_ap = tos_to_tid_inv[i];
			priv->aggr_prio_tbl[i].ampdu_user = tos_to_tid_inv[i];
			priv->wmm.tid_tbl_ptr[i].ra_list_curr = NULL;
		}

		priv->aggr_prio_tbl[6].amsdu
431 432 433
					= priv->aggr_prio_tbl[6].ampdu_ap
					= priv->aggr_prio_tbl[6].ampdu_user
					= BA_STREAM_NOT_ALLOWED;
434 435

		priv->aggr_prio_tbl[7].amsdu = priv->aggr_prio_tbl[7].ampdu_ap
436 437
					= priv->aggr_prio_tbl[7].ampdu_user
					= BA_STREAM_NOT_ALLOWED;
438

439
		mwifiex_set_ba_params(priv);
440 441
		mwifiex_reset_11n_rx_seq_num(priv);

442
		atomic_set(&priv->wmm.tx_pkts_queued, 0);
443
		atomic_set(&priv->wmm.highest_queued_prio, HIGH_PRIO_TID);
444 445 446 447 448 449 450 451 452
	}
}

/*
 * This function checks if WMM Tx queue is empty.
 */
int
mwifiex_wmm_lists_empty(struct mwifiex_adapter *adapter)
{
453
	int i;
454 455
	struct mwifiex_private *priv;

456 457 458
	for (i = 0; i < adapter->priv_num; ++i) {
		priv = adapter->priv[i];
		if (priv && atomic_read(&priv->wmm.tx_pkts_queued))
S
Stone Piao 已提交
459
			return false;
460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479
	}

	return true;
}

/*
 * This function deletes all packets in an RA list node.
 *
 * The packet sent completion callback handler are called with
 * status failure, after they are dequeued to ensure proper
 * cleanup. The RA list node itself is freed at the end.
 */
static void
mwifiex_wmm_del_pkts_in_ralist_node(struct mwifiex_private *priv,
				    struct mwifiex_ra_list_tbl *ra_list)
{
	struct mwifiex_adapter *adapter = priv->adapter;
	struct sk_buff *skb, *tmp;

	skb_queue_walk_safe(&ra_list->skb_head, skb, tmp)
A
Avinash Patil 已提交
480
		mwifiex_write_data_complete(adapter, skb, 0, -1);
481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507
}

/*
 * This function deletes all packets in an RA list.
 *
 * Each nodes in the RA list are freed individually first, and then
 * the RA list itself is freed.
 */
static void
mwifiex_wmm_del_pkts_in_ralist(struct mwifiex_private *priv,
			       struct list_head *ra_list_head)
{
	struct mwifiex_ra_list_tbl *ra_list;

	list_for_each_entry(ra_list, ra_list_head, list)
		mwifiex_wmm_del_pkts_in_ralist_node(priv, ra_list);
}

/*
 * This function deletes all packets in all RA lists.
 */
static void mwifiex_wmm_cleanup_queues(struct mwifiex_private *priv)
{
	int i;

	for (i = 0; i < MAX_NUM_TID; i++)
		mwifiex_wmm_del_pkts_in_ralist(priv, &priv->wmm.tid_tbl_ptr[i].
508
								       ra_list);
509 510

	atomic_set(&priv->wmm.tx_pkts_queued, 0);
511
	atomic_set(&priv->wmm.highest_queued_prio, HIGH_PRIO_TID);
512 513 514 515 516 517 518 519 520 521 522 523
}

/*
 * This function deletes all route addresses from all RA lists.
 */
static void mwifiex_wmm_delete_all_ralist(struct mwifiex_private *priv)
{
	struct mwifiex_ra_list_tbl *ra_list, *tmp_node;
	int i;

	for (i = 0; i < MAX_NUM_TID; ++i) {
		dev_dbg(priv->adapter->dev,
524
			"info: ra_list: freeing buf for tid %d\n", i);
525
		list_for_each_entry_safe(ra_list, tmp_node,
526 527
					 &priv->wmm.tid_tbl_ptr[i].ra_list,
					 list) {
528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564
			list_del(&ra_list->list);
			kfree(ra_list);
		}

		INIT_LIST_HEAD(&priv->wmm.tid_tbl_ptr[i].ra_list);

		priv->wmm.tid_tbl_ptr[i].ra_list_curr = NULL;
	}
}

/*
 * This function cleans up the Tx and Rx queues.
 *
 * Cleanup includes -
 *      - All packets in RA lists
 *      - All entries in Rx reorder table
 *      - All entries in Tx BA stream table
 *      - MPA buffer (if required)
 *      - All RA lists
 */
void
mwifiex_clean_txrx(struct mwifiex_private *priv)
{
	unsigned long flags;

	mwifiex_11n_cleanup_reorder_tbl(priv);
	spin_lock_irqsave(&priv->wmm.ra_list_spinlock, flags);

	mwifiex_wmm_cleanup_queues(priv);
	mwifiex_11n_delete_all_tx_ba_stream_tbl(priv);

	if (priv->adapter->if_ops.cleanup_mpa_buf)
		priv->adapter->if_ops.cleanup_mpa_buf(priv->adapter);

	mwifiex_wmm_delete_all_ralist(priv);
	memcpy(tos_to_tid, ac_to_tid, sizeof(tos_to_tid));

565 566
	if (priv->adapter->if_ops.clean_pcie_ring)
		priv->adapter->if_ops.clean_pcie_ring(priv->adapter);
567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637
	spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, flags);
}

/*
 * This function retrieves a particular RA list node, matching with the
 * given TID and RA address.
 */
static struct mwifiex_ra_list_tbl *
mwifiex_wmm_get_ralist_node(struct mwifiex_private *priv, u8 tid,
			    u8 *ra_addr)
{
	struct mwifiex_ra_list_tbl *ra_list;

	list_for_each_entry(ra_list, &priv->wmm.tid_tbl_ptr[tid].ra_list,
			    list) {
		if (!memcmp(ra_list->ra, ra_addr, ETH_ALEN))
			return ra_list;
	}

	return NULL;
}

/*
 * This function retrieves an RA list node for a given TID and
 * RA address pair.
 *
 * If no such node is found, a new node is added first and then
 * retrieved.
 */
static struct mwifiex_ra_list_tbl *
mwifiex_wmm_get_queue_raptr(struct mwifiex_private *priv, u8 tid, u8 *ra_addr)
{
	struct mwifiex_ra_list_tbl *ra_list;

	ra_list = mwifiex_wmm_get_ralist_node(priv, tid, ra_addr);
	if (ra_list)
		return ra_list;
	mwifiex_ralist_add(priv, ra_addr);

	return mwifiex_wmm_get_ralist_node(priv, tid, ra_addr);
}

/*
 * This function checks if a particular RA list node exists in a given TID
 * table index.
 */
int
mwifiex_is_ralist_valid(struct mwifiex_private *priv,
			struct mwifiex_ra_list_tbl *ra_list, int ptr_index)
{
	struct mwifiex_ra_list_tbl *rlist;

	list_for_each_entry(rlist, &priv->wmm.tid_tbl_ptr[ptr_index].ra_list,
			    list) {
		if (rlist == ra_list)
			return true;
	}

	return false;
}

/*
 * This function adds a packet to WMM queue.
 *
 * In disconnected state the packet is immediately dropped and the
 * packet send completion callback is called with status failure.
 *
 * Otherwise, the correct RA list node is located and the packet
 * is queued at the list tail.
 */
void
638
mwifiex_wmm_add_buf_txqueue(struct mwifiex_private *priv,
639 640
			    struct sk_buff *skb)
{
641
	struct mwifiex_adapter *adapter = priv->adapter;
642 643 644 645 646
	u32 tid;
	struct mwifiex_ra_list_tbl *ra_list;
	u8 ra[ETH_ALEN], tid_down;
	unsigned long flags;

647
	if (!priv->media_connected && !mwifiex_is_skb_mgmt_frame(skb)) {
648
		dev_dbg(adapter->dev, "data: drop packet in disconnect\n");
A
Avinash Patil 已提交
649
		mwifiex_write_data_complete(adapter, skb, 0, -1);
650 651 652 653 654 655 656 657 658 659 660 661
		return;
	}

	tid = skb->priority;

	spin_lock_irqsave(&priv->wmm.ra_list_spinlock, flags);

	tid_down = mwifiex_wmm_downgrade_tid(priv, tid);

	/* In case of infra as we have already created the list during
	   association we just don't have to call get_queue_raptr, we will
	   have only 1 raptr for a tid in case of infra */
662 663
	if (!mwifiex_queuing_ra_based(priv) &&
	    !mwifiex_is_skb_mgmt_frame(skb)) {
664 665 666 667 668 669 670 671
		if (!list_empty(&priv->wmm.tid_tbl_ptr[tid_down].ra_list))
			ra_list = list_first_entry(
				&priv->wmm.tid_tbl_ptr[tid_down].ra_list,
				struct mwifiex_ra_list_tbl, list);
		else
			ra_list = NULL;
	} else {
		memcpy(ra, skb->data, ETH_ALEN);
672
		if (ra[0] & 0x01 || mwifiex_is_skb_mgmt_frame(skb))
673
			memset(ra, 0xff, ETH_ALEN);
674 675 676 677 678
		ra_list = mwifiex_wmm_get_queue_raptr(priv, tid_down, ra);
	}

	if (!ra_list) {
		spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, flags);
A
Avinash Patil 已提交
679
		mwifiex_write_data_complete(adapter, skb, 0, -1);
680 681 682 683 684 685
		return;
	}

	skb_queue_tail(&ra_list->skb_head, skb);

	ra_list->total_pkts_size += skb->len;
686
	ra_list->pkt_count++;
687

688 689 690
	if (atomic_read(&priv->wmm.highest_queued_prio) <
						tos_to_tid_inv[tid_down])
		atomic_set(&priv->wmm.highest_queued_prio,
691
			   tos_to_tid_inv[tid_down]);
692

693 694
	atomic_inc(&priv->wmm.tx_pkts_queued);

695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721
	spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, flags);
}

/*
 * This function processes the get WMM status command response from firmware.
 *
 * The response may contain multiple TLVs -
 *      - AC Queue status TLVs
 *      - Current WMM Parameter IE TLV
 *      - Admission Control action frame TLVs
 *
 * This function parses the TLVs and then calls further specific functions
 * to process any changes in the queue prioritize or state.
 */
int mwifiex_ret_wmm_get_status(struct mwifiex_private *priv,
			       const struct host_cmd_ds_command *resp)
{
	u8 *curr = (u8 *) &resp->params.get_wmm_status;
	uint16_t resp_len = le16_to_cpu(resp->size), tlv_len;
	int valid = true;

	struct mwifiex_ie_types_data *tlv_hdr;
	struct mwifiex_ie_types_wmm_queue_status *tlv_wmm_qstatus;
	struct ieee_types_wmm_parameter *wmm_param_ie = NULL;
	struct mwifiex_wmm_ac_status *ac_status;

	dev_dbg(priv->adapter->dev, "info: WMM: WMM_GET_STATUS cmdresp received: %d\n",
722
		resp_len);
723 724 725 726 727 728 729 730 731 732 733 734 735

	while ((resp_len >= sizeof(tlv_hdr->header)) && valid) {
		tlv_hdr = (struct mwifiex_ie_types_data *) curr;
		tlv_len = le16_to_cpu(tlv_hdr->header.len);

		switch (le16_to_cpu(tlv_hdr->header.type)) {
		case TLV_TYPE_WMMQSTATUS:
			tlv_wmm_qstatus =
				(struct mwifiex_ie_types_wmm_queue_status *)
				tlv_hdr;
			dev_dbg(priv->adapter->dev,
				"info: CMD_RESP: WMM_GET_STATUS:"
				" QSTATUS TLV: %d, %d, %d\n",
736 737 738
				tlv_wmm_qstatus->queue_index,
				tlv_wmm_qstatus->flow_required,
				tlv_wmm_qstatus->disabled);
739 740 741 742 743

			ac_status = &priv->wmm.ac_status[tlv_wmm_qstatus->
							 queue_index];
			ac_status->disabled = tlv_wmm_qstatus->disabled;
			ac_status->flow_required =
744
						tlv_wmm_qstatus->flow_required;
745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812
			ac_status->flow_created = tlv_wmm_qstatus->flow_created;
			break;

		case WLAN_EID_VENDOR_SPECIFIC:
			/*
			 * Point the regular IEEE IE 2 bytes into the Marvell IE
			 *   and setup the IEEE IE type and length byte fields
			 */

			wmm_param_ie =
				(struct ieee_types_wmm_parameter *) (curr +
								    2);
			wmm_param_ie->vend_hdr.len = (u8) tlv_len;
			wmm_param_ie->vend_hdr.element_id =
						WLAN_EID_VENDOR_SPECIFIC;

			dev_dbg(priv->adapter->dev,
				"info: CMD_RESP: WMM_GET_STATUS:"
				" WMM Parameter Set Count: %d\n",
				wmm_param_ie->qos_info_bitmap &
				IEEE80211_WMM_IE_AP_QOSINFO_PARAM_SET_CNT_MASK);

			memcpy((u8 *) &priv->curr_bss_params.bss_descriptor.
			       wmm_ie, wmm_param_ie,
			       wmm_param_ie->vend_hdr.len + 2);

			break;

		default:
			valid = false;
			break;
		}

		curr += (tlv_len + sizeof(tlv_hdr->header));
		resp_len -= (tlv_len + sizeof(tlv_hdr->header));
	}

	mwifiex_wmm_setup_queue_priorities(priv, wmm_param_ie);
	mwifiex_wmm_setup_ac_downgrade(priv);

	return 0;
}

/*
 * Callback handler from the command module to allow insertion of a WMM TLV.
 *
 * If the BSS we are associating to supports WMM, this function adds the
 * required WMM Information IE to the association request command buffer in
 * the form of a Marvell extended IEEE IE.
 */
u32
mwifiex_wmm_process_association_req(struct mwifiex_private *priv,
				    u8 **assoc_buf,
				    struct ieee_types_wmm_parameter *wmm_ie,
				    struct ieee80211_ht_cap *ht_cap)
{
	struct mwifiex_ie_types_wmm_param_set *wmm_tlv;
	u32 ret_len = 0;

	/* Null checks */
	if (!assoc_buf)
		return 0;
	if (!(*assoc_buf))
		return 0;

	if (!wmm_ie)
		return 0;

813 814 815
	dev_dbg(priv->adapter->dev,
		"info: WMM: process assoc req: bss->wmm_ie=%#x\n",
		wmm_ie->vend_hdr.element_id);
816

817 818 819 820
	if ((priv->wmm_required ||
	     (ht_cap && (priv->adapter->config_bands & BAND_GN ||
	     priv->adapter->config_bands & BAND_AN))) &&
	    wmm_ie->vend_hdr.element_id == WLAN_EID_VENDOR_SPECIFIC) {
821 822 823 824
		wmm_tlv = (struct mwifiex_ie_types_wmm_param_set *) *assoc_buf;
		wmm_tlv->header.type = cpu_to_le16((u16) wmm_info_ie[0]);
		wmm_tlv->header.len = cpu_to_le16((u16) wmm_info_ie[1]);
		memcpy(wmm_tlv->wmm_ie, &wmm_info_ie[2],
825
		       le16_to_cpu(wmm_tlv->header.len));
826 827
		if (wmm_ie->qos_info_bitmap & IEEE80211_WMM_IE_AP_QOSINFO_UAPSD)
			memcpy((u8 *) (wmm_tlv->wmm_ie
828 829 830
				       + le16_to_cpu(wmm_tlv->header.len)
				       - sizeof(priv->wmm_qosinfo)),
			       &priv->wmm_qosinfo, sizeof(priv->wmm_qosinfo));
831 832

		ret_len = sizeof(wmm_tlv->header)
833
			  + le16_to_cpu(wmm_tlv->header.len);
834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851

		*assoc_buf += ret_len;
	}

	return ret_len;
}

/*
 * This function computes the time delay in the driver queues for a
 * given packet.
 *
 * When the packet is received at the OS/Driver interface, the current
 * time is set in the packet structure. The difference between the present
 * time and that received time is computed in this function and limited
 * based on pre-compiled limits in the driver.
 */
u8
mwifiex_wmm_compute_drv_pkt_delay(struct mwifiex_private *priv,
852
				  const struct sk_buff *skb)
853
{
854
	u8 ret_val;
855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888
	struct timeval out_tstamp, in_tstamp;
	u32 queue_delay;

	do_gettimeofday(&out_tstamp);
	in_tstamp = ktime_to_timeval(skb->tstamp);

	queue_delay = (out_tstamp.tv_sec - in_tstamp.tv_sec) * 1000;
	queue_delay += (out_tstamp.tv_usec - in_tstamp.tv_usec) / 1000;

	/*
	 * Queue delay is passed as a uint8 in units of 2ms (ms shifted
	 *  by 1). Min value (other than 0) is therefore 2ms, max is 510ms.
	 *
	 * Pass max value if queue_delay is beyond the uint8 range
	 */
	ret_val = (u8) (min(queue_delay, priv->wmm.drv_pkt_delay_max) >> 1);

	dev_dbg(priv->adapter->dev, "data: WMM: Pkt Delay: %d ms,"
				" %d ms sent to FW\n", queue_delay, ret_val);

	return ret_val;
}

/*
 * This function retrieves the highest priority RA list table pointer.
 */
static struct mwifiex_ra_list_tbl *
mwifiex_wmm_get_highest_priolist_ptr(struct mwifiex_adapter *adapter,
				     struct mwifiex_private **priv, int *tid)
{
	struct mwifiex_private *priv_tmp;
	struct mwifiex_ra_list_tbl *ptr, *head;
	struct mwifiex_bss_prio_node *bssprio_node, *bssprio_head;
	struct mwifiex_tid_tbl *tid_ptr;
889
	atomic_t *hqp;
890
	unsigned long flags_bss, flags_ra;
891 892 893 894
	int i, j;

	for (j = adapter->priv_num - 1; j >= 0; --j) {
		spin_lock_irqsave(&adapter->bss_prio_tbl[j].bss_prio_lock,
895 896 897 898
				  flags_bss);

		if (list_empty(&adapter->bss_prio_tbl[j].bss_prio_head))
			goto skip_prio_tbl;
899 900 901 902

		if (adapter->bss_prio_tbl[j].bss_prio_cur ==
		    (struct mwifiex_bss_prio_node *)
		    &adapter->bss_prio_tbl[j].bss_prio_head) {
903
			adapter->bss_prio_tbl[j].bss_prio_cur =
904 905 906 907 908 909
				list_first_entry(&adapter->bss_prio_tbl[j]
						 .bss_prio_head,
						 struct mwifiex_bss_prio_node,
						 list);
		}

910 911 912
		bssprio_node = adapter->bss_prio_tbl[j].bss_prio_cur;
		bssprio_head = bssprio_node;

913 914 915
		do {
			priv_tmp = bssprio_node->priv;

916 917 918 919 920
			if (atomic_read(&priv_tmp->wmm.tx_pkts_queued) == 0)
				goto skip_bss;

			/* iterate over the WMM queues of the BSS */
			hqp = &priv_tmp->wmm.highest_queued_prio;
921
			for (i = atomic_read(hqp); i >= LOW_PRIO_TID; --i) {
922

923 924 925
				spin_lock_irqsave(&priv_tmp->wmm.
						  ra_list_spinlock, flags_ra);

926 927 928
				tid_ptr = &(priv_tmp)->wmm.
					tid_tbl_ptr[tos_to_tid[i]];

929 930
				/* For non-STA ra_list_curr may be NULL */
				if (!tid_ptr->ra_list_curr)
931
					goto skip_wmm_queue;
932

933 934
				if (list_empty(&tid_ptr->ra_list))
					goto skip_wmm_queue;
935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955

				/*
				 * Always choose the next ra we transmitted
				 * last time, this way we pick the ra's in
				 * round robin fashion.
				 */
				ptr = list_first_entry(
						&tid_ptr->ra_list_curr->list,
						struct mwifiex_ra_list_tbl,
						list);

				head = ptr;
				if (ptr == (struct mwifiex_ra_list_tbl *)
						&tid_ptr->ra_list) {
					/* Get next ra */
					ptr = list_first_entry(&ptr->list,
					    struct mwifiex_ra_list_tbl, list);
					head = ptr;
				}

				do {
956 957
					if (!skb_queue_empty(&ptr->skb_head))
						/* holds both locks */
958 959
						goto found;

960 961 962 963 964 965 966 967 968 969 970 971
					/* Get next ra */
					ptr = list_first_entry(&ptr->list,
						 struct mwifiex_ra_list_tbl,
						 list);
					if (ptr ==
					    (struct mwifiex_ra_list_tbl *)
					    &tid_ptr->ra_list)
						ptr = list_first_entry(
						    &ptr->list,
						    struct mwifiex_ra_list_tbl,
						    list);
				} while (ptr != head);
972 973 974 975 976

skip_wmm_queue:
				spin_unlock_irqrestore(&priv_tmp->wmm.
						       ra_list_spinlock,
						       flags_ra);
977 978
			}

979
skip_bss:
980 981 982 983 984 985 986 987 988 989 990 991 992 993
			/* Get next bss priority node */
			bssprio_node = list_first_entry(&bssprio_node->list,
						struct mwifiex_bss_prio_node,
						list);

			if (bssprio_node ==
			    (struct mwifiex_bss_prio_node *)
			    &adapter->bss_prio_tbl[j].bss_prio_head)
				/* Get next bss priority node */
				bssprio_node = list_first_entry(
						&bssprio_node->list,
						struct mwifiex_bss_prio_node,
						list);
		} while (bssprio_node != bssprio_head);
994 995 996 997

skip_prio_tbl:
		spin_unlock_irqrestore(&adapter->bss_prio_tbl[j].bss_prio_lock,
				       flags_bss);
998
	}
999

1000
	return NULL;
1001 1002

found:
1003
	/* holds bss_prio_lock / ra_list_spinlock */
1004 1005
	if (atomic_read(hqp) > i)
		atomic_set(hqp, i);
1006 1007 1008
	spin_unlock_irqrestore(&priv_tmp->wmm.ra_list_spinlock, flags_ra);
	spin_unlock_irqrestore(&adapter->bss_prio_tbl[j].bss_prio_lock,
			       flags_bss);
1009 1010 1011 1012 1013

	*priv = priv_tmp;
	*tid = tos_to_tid[i];

	return ptr;
1014 1015
}

1016 1017 1018 1019 1020 1021 1022 1023 1024 1025
/*
 * This function checks if 11n aggregation is possible.
 */
static int
mwifiex_is_11n_aggragation_possible(struct mwifiex_private *priv,
				    struct mwifiex_ra_list_tbl *ptr,
				    int max_buf_size)
{
	int count = 0, total_size = 0;
	struct sk_buff *skb, *tmp;
1026 1027 1028 1029 1030 1031 1032
	int max_amsdu_size;

	if (priv->bss_role == MWIFIEX_BSS_ROLE_UAP && priv->ap_11n_enabled &&
	    ptr->is_11n_enabled)
		max_amsdu_size = min_t(int, ptr->max_amsdu, max_buf_size);
	else
		max_amsdu_size = max_buf_size;
1033 1034 1035

	skb_queue_walk_safe(&ptr->skb_head, skb, tmp) {
		total_size += skb->len;
1036
		if (total_size >= max_amsdu_size)
1037 1038 1039 1040 1041 1042 1043 1044
			break;
		if (++count >= MIN_NUM_AMSDU)
			return true;
	}

	return false;
}

1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082
/*
 * This function sends a single packet to firmware for transmission.
 */
static void
mwifiex_send_single_packet(struct mwifiex_private *priv,
			   struct mwifiex_ra_list_tbl *ptr, int ptr_index,
			   unsigned long ra_list_flags)
			   __releases(&priv->wmm.ra_list_spinlock)
{
	struct sk_buff *skb, *skb_next;
	struct mwifiex_tx_param tx_param;
	struct mwifiex_adapter *adapter = priv->adapter;
	struct mwifiex_txinfo *tx_info;

	if (skb_queue_empty(&ptr->skb_head)) {
		spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
				       ra_list_flags);
		dev_dbg(adapter->dev, "data: nothing to send\n");
		return;
	}

	skb = skb_dequeue(&ptr->skb_head);

	tx_info = MWIFIEX_SKB_TXCB(skb);
	dev_dbg(adapter->dev, "data: dequeuing the packet %p %p\n", ptr, skb);

	ptr->total_pkts_size -= skb->len;

	if (!skb_queue_empty(&ptr->skb_head))
		skb_next = skb_peek(&ptr->skb_head);
	else
		skb_next = NULL;

	spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, ra_list_flags);

	tx_param.next_pkt_len = ((skb_next) ? skb_next->len +
				sizeof(struct txpd) : 0);

1083
	if (mwifiex_process_tx(priv, skb, &tx_param) == -EBUSY) {
1084 1085 1086 1087 1088 1089
		/* Queue the packet back at the head */
		spin_lock_irqsave(&priv->wmm.ra_list_spinlock, ra_list_flags);

		if (!mwifiex_is_ralist_valid(priv, ptr, ptr_index)) {
			spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
					       ra_list_flags);
A
Avinash Patil 已提交
1090
			mwifiex_write_data_complete(adapter, skb, 0, -1);
1091 1092 1093 1094 1095 1096
			return;
		}

		skb_queue_tail(&ptr->skb_head, skb);

		ptr->total_pkts_size += skb->len;
1097
		ptr->pkt_count++;
1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112
		tx_info->flags |= MWIFIEX_BUF_FLAG_REQUEUED_PKT;
		spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
				       ra_list_flags);
	} else {
		spin_lock_irqsave(&priv->wmm.ra_list_spinlock, ra_list_flags);
		if (mwifiex_is_ralist_valid(priv, ptr, ptr_index)) {
			priv->wmm.packets_out[ptr_index]++;
			priv->wmm.tid_tbl_ptr[ptr_index].ra_list_curr = ptr;
		}
		adapter->bss_prio_tbl[priv->bss_priority].bss_prio_cur =
			list_first_entry(
				&adapter->bss_prio_tbl[priv->bss_priority]
				.bss_prio_cur->list,
				struct mwifiex_bss_prio_node,
				list);
1113
		atomic_dec(&priv->wmm.tx_pkts_queued);
1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173
		spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
				       ra_list_flags);
	}
}

/*
 * This function checks if the first packet in the given RA list
 * is already processed or not.
 */
static int
mwifiex_is_ptr_processed(struct mwifiex_private *priv,
			 struct mwifiex_ra_list_tbl *ptr)
{
	struct sk_buff *skb;
	struct mwifiex_txinfo *tx_info;

	if (skb_queue_empty(&ptr->skb_head))
		return false;

	skb = skb_peek(&ptr->skb_head);

	tx_info = MWIFIEX_SKB_TXCB(skb);
	if (tx_info->flags & MWIFIEX_BUF_FLAG_REQUEUED_PKT)
		return true;

	return false;
}

/*
 * This function sends a single processed packet to firmware for
 * transmission.
 */
static void
mwifiex_send_processed_packet(struct mwifiex_private *priv,
			      struct mwifiex_ra_list_tbl *ptr, int ptr_index,
			      unsigned long ra_list_flags)
				__releases(&priv->wmm.ra_list_spinlock)
{
	struct mwifiex_tx_param tx_param;
	struct mwifiex_adapter *adapter = priv->adapter;
	int ret = -1;
	struct sk_buff *skb, *skb_next;
	struct mwifiex_txinfo *tx_info;

	if (skb_queue_empty(&ptr->skb_head)) {
		spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
				       ra_list_flags);
		return;
	}

	skb = skb_dequeue(&ptr->skb_head);

	if (!skb_queue_empty(&ptr->skb_head))
		skb_next = skb_peek(&ptr->skb_head);
	else
		skb_next = NULL;

	tx_info = MWIFIEX_SKB_TXCB(skb);

	spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, ra_list_flags);
1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184 1185 1186

	if (adapter->iface_type == MWIFIEX_USB) {
		adapter->data_sent = true;
		ret = adapter->if_ops.host_to_card(adapter, MWIFIEX_USB_EP_DATA,
						   skb, NULL);
	} else {
		tx_param.next_pkt_len =
			((skb_next) ? skb_next->len +
			 sizeof(struct txpd) : 0);
		ret = adapter->if_ops.host_to_card(adapter, MWIFIEX_TYPE_DATA,
						   skb, &tx_param);
	}

1187 1188 1189 1190 1191 1192 1193 1194
	switch (ret) {
	case -EBUSY:
		dev_dbg(adapter->dev, "data: -EBUSY is returned\n");
		spin_lock_irqsave(&priv->wmm.ra_list_spinlock, ra_list_flags);

		if (!mwifiex_is_ralist_valid(priv, ptr, ptr_index)) {
			spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
					       ra_list_flags);
A
Avinash Patil 已提交
1195
			mwifiex_write_data_complete(adapter, skb, 0, -1);
1196 1197 1198 1199 1200 1201 1202 1203 1204 1205
			return;
		}

		skb_queue_tail(&ptr->skb_head, skb);

		tx_info->flags |= MWIFIEX_BUF_FLAG_REQUEUED_PKT;
		spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
				       ra_list_flags);
		break;
	case -1:
1206 1207
		if (adapter->iface_type != MWIFIEX_PCIE)
			adapter->data_sent = false;
1208 1209
		dev_err(adapter->dev, "host_to_card failed: %#x\n", ret);
		adapter->dbg.num_tx_host_to_card_failure++;
A
Avinash Patil 已提交
1210
		mwifiex_write_data_complete(adapter, skb, 0, ret);
1211 1212
		break;
	case -EINPROGRESS:
1213 1214
		if (adapter->iface_type != MWIFIEX_PCIE)
			adapter->data_sent = false;
1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229
	default:
		break;
	}
	if (ret != -EBUSY) {
		spin_lock_irqsave(&priv->wmm.ra_list_spinlock, ra_list_flags);
		if (mwifiex_is_ralist_valid(priv, ptr, ptr_index)) {
			priv->wmm.packets_out[ptr_index]++;
			priv->wmm.tid_tbl_ptr[ptr_index].ra_list_curr = ptr;
		}
		adapter->bss_prio_tbl[priv->bss_priority].bss_prio_cur =
			list_first_entry(
				&adapter->bss_prio_tbl[priv->bss_priority]
				.bss_prio_cur->list,
				struct mwifiex_bss_prio_node,
				list);
1230
		atomic_dec(&priv->wmm.tx_pkts_queued);
1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253
		spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
				       ra_list_flags);
	}
}

/*
 * This function dequeues a packet from the highest priority list
 * and transmits it.
 */
static int
mwifiex_dequeue_tx_packet(struct mwifiex_adapter *adapter)
{
	struct mwifiex_ra_list_tbl *ptr;
	struct mwifiex_private *priv = NULL;
	int ptr_index = 0;
	u8 ra[ETH_ALEN];
	int tid_del = 0, tid = 0;
	unsigned long flags;

	ptr = mwifiex_wmm_get_highest_priolist_ptr(adapter, &priv, &ptr_index);
	if (!ptr)
		return -1;

1254
	tid = mwifiex_get_tid(ptr);
1255 1256 1257 1258 1259 1260 1261 1262 1263 1264 1265 1266 1267 1268 1269 1270

	dev_dbg(adapter->dev, "data: tid=%d\n", tid);

	spin_lock_irqsave(&priv->wmm.ra_list_spinlock, flags);
	if (!mwifiex_is_ralist_valid(priv, ptr, ptr_index)) {
		spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, flags);
		return -1;
	}

	if (mwifiex_is_ptr_processed(priv, ptr)) {
		mwifiex_send_processed_packet(priv, ptr, ptr_index, flags);
		/* ra_list_spinlock has been freed in
		   mwifiex_send_processed_packet() */
		return 0;
	}

1271 1272
	if (!ptr->is_11n_enabled ||
	    mwifiex_is_ba_stream_setup(priv, ptr, tid) ||
1273
	    priv->wps.session_enable ||
1274 1275 1276
	    ((priv->sec_info.wpa_enabled ||
	      priv->sec_info.wpa2_enabled) &&
	     !priv->wpa_is_gtk_set)) {
1277 1278 1279 1280
		mwifiex_send_single_packet(priv, ptr, ptr_index, flags);
		/* ra_list_spinlock has been freed in
		   mwifiex_send_single_packet() */
	} else {
1281 1282
		if (mwifiex_is_ampdu_allowed(priv, tid) &&
		    ptr->pkt_count > ptr->ba_packet_thr) {
1283
			if (mwifiex_space_avail_for_new_ba_stream(adapter)) {
1284 1285
				mwifiex_create_ba_tbl(priv, ptr->ra, tid,
						      BA_SETUP_INPROGRESS);
1286 1287
				mwifiex_send_addba(priv, tid, ptr->ra);
			} else if (mwifiex_find_stream_to_delete
1288
				   (priv, tid, &tid_del, ra)) {
1289 1290
				mwifiex_create_ba_tbl(priv, ptr->ra, tid,
						      BA_SETUP_INPROGRESS);
1291 1292 1293
				mwifiex_send_delba(priv, tid_del, ra, 1);
			}
		}
1294
		if (mwifiex_is_amsdu_allowed(priv, tid) &&
1295 1296
		    mwifiex_is_11n_aggragation_possible(priv, ptr,
							adapter->tx_buf_size))
1297 1298 1299 1300 1301 1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322
			mwifiex_11n_aggregate_pkt(priv, ptr, INTF_HEADER_LEN,
						  ptr_index, flags);
			/* ra_list_spinlock has been freed in
			   mwifiex_11n_aggregate_pkt() */
		else
			mwifiex_send_single_packet(priv, ptr, ptr_index, flags);
			/* ra_list_spinlock has been freed in
			   mwifiex_send_single_packet() */
	}
	return 0;
}

/*
 * This function transmits the highest priority packet awaiting in the
 * WMM Queues.
 */
void
mwifiex_wmm_process_tx(struct mwifiex_adapter *adapter)
{
	do {
		/* Check if busy */
		if (adapter->data_sent || adapter->tx_lock_flag)
			break;

		if (mwifiex_dequeue_tx_packet(adapter))
			break;
1323
	} while (!mwifiex_wmm_lists_empty(adapter));
1324
}