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-rw-r--r--drivers/net/wireless/mwifiex/wmm.c1264
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diff --git a/drivers/net/wireless/mwifiex/wmm.c b/drivers/net/wireless/mwifiex/wmm.c
new file mode 100644
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1/*
2 * Marvell Wireless LAN device driver: WMM
3 *
4 * Copyright (C) 2011, 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
40/* WMM information IE */
41static const u8 wmm_info_ie[] = { WLAN_EID_VENDOR_SPECIFIC, 0x07,
42 0x00, 0x50, 0xf2, 0x02,
43 0x00, 0x01, 0x00
44};
45
46static const u8 wmm_aci_to_qidx_map[] = { WMM_AC_BE,
47 WMM_AC_BK,
48 WMM_AC_VI,
49 WMM_AC_VO
50};
51
52static u8 tos_to_tid[] = {
53 /* TID DSCP_P2 DSCP_P1 DSCP_P0 WMM_AC */
54 0x01, /* 0 1 0 AC_BK */
55 0x02, /* 0 0 0 AC_BK */
56 0x00, /* 0 0 1 AC_BE */
57 0x03, /* 0 1 1 AC_BE */
58 0x04, /* 1 0 0 AC_VI */
59 0x05, /* 1 0 1 AC_VI */
60 0x06, /* 1 1 0 AC_VO */
61 0x07 /* 1 1 1 AC_VO */
62};
63
64/*
65 * This table inverses the tos_to_tid operation to get a priority
66 * which is in sequential order, and can be compared.
67 * Use this to compare the priority of two different TIDs.
68 */
69static u8 tos_to_tid_inv[] = {
70 0x02, /* from tos_to_tid[2] = 0 */
71 0x00, /* from tos_to_tid[0] = 1 */
72 0x01, /* from tos_to_tid[1] = 2 */
73 0x03,
74 0x04,
75 0x05,
76 0x06,
77 0x07};
78
79static u8 ac_to_tid[4][2] = { {1, 2}, {0, 3}, {4, 5}, {6, 7} };
80
81/*
82 * This function debug prints the priority parameters for a WMM AC.
83 */
84static void
85mwifiex_wmm_ac_debug_print(const struct ieee_types_wmm_ac_parameters *ac_param)
86{
87 const char *ac_str[] = { "BK", "BE", "VI", "VO" };
88
89 pr_debug("info: WMM AC_%s: ACI=%d, ACM=%d, Aifsn=%d, "
90 "EcwMin=%d, EcwMax=%d, TxopLimit=%d\n",
91 ac_str[wmm_aci_to_qidx_map[(ac_param->aci_aifsn_bitmap
92 & MWIFIEX_ACI) >> 5]],
93 (ac_param->aci_aifsn_bitmap & MWIFIEX_ACI) >> 5,
94 (ac_param->aci_aifsn_bitmap & MWIFIEX_ACM) >> 4,
95 ac_param->aci_aifsn_bitmap & MWIFIEX_AIFSN,
96 ac_param->ecw_bitmap & MWIFIEX_ECW_MIN,
97 (ac_param->ecw_bitmap & MWIFIEX_ECW_MAX) >> 4,
98 le16_to_cpu(ac_param->tx_op_limit));
99}
100
101/*
102 * This function allocates a route address list.
103 *
104 * The function also initializes the list with the provided RA.
105 */
106static struct mwifiex_ra_list_tbl *
107mwifiex_wmm_allocate_ralist_node(struct mwifiex_adapter *adapter, u8 *ra)
108{
109 struct mwifiex_ra_list_tbl *ra_list;
110
111 ra_list = kzalloc(sizeof(struct mwifiex_ra_list_tbl), GFP_ATOMIC);
112
113 if (!ra_list) {
114 dev_err(adapter->dev, "%s: failed to alloc ra_list\n",
115 __func__);
116 return NULL;
117 }
118 INIT_LIST_HEAD(&ra_list->list);
119 skb_queue_head_init(&ra_list->skb_head);
120
121 memcpy(ra_list->ra, ra, ETH_ALEN);
122
123 ra_list->total_pkts_size = 0;
124
125 dev_dbg(adapter->dev, "info: allocated ra_list %p\n", ra_list);
126
127 return ra_list;
128}
129
130/*
131 * This function allocates and adds a RA list for all TIDs
132 * with the given RA.
133 */
134void
135mwifiex_ralist_add(struct mwifiex_private *priv, u8 *ra)
136{
137 int i;
138 struct mwifiex_ra_list_tbl *ra_list;
139 struct mwifiex_adapter *adapter = priv->adapter;
140
141 for (i = 0; i < MAX_NUM_TID; ++i) {
142 ra_list = mwifiex_wmm_allocate_ralist_node(adapter, ra);
143 dev_dbg(adapter->dev, "info: created ra_list %p\n", ra_list);
144
145 if (!ra_list)
146 break;
147
148 if (!mwifiex_queuing_ra_based(priv))
149 ra_list->is_11n_enabled = IS_11N_ENABLED(priv);
150 else
151 ra_list->is_11n_enabled = false;
152
153 dev_dbg(adapter->dev, "data: ralist %p: is_11n_enabled=%d\n",
154 ra_list, ra_list->is_11n_enabled);
155
156 list_add_tail(&ra_list->list,
157 &priv->wmm.tid_tbl_ptr[i].ra_list);
158
159 if (!priv->wmm.tid_tbl_ptr[i].ra_list_curr)
160 priv->wmm.tid_tbl_ptr[i].ra_list_curr = ra_list;
161 }
162}
163
164/*
165 * This function sets the WMM queue priorities to their default values.
166 */
167static void mwifiex_wmm_default_queue_priorities(struct mwifiex_private *priv)
168{
169 /* Default queue priorities: VO->VI->BE->BK */
170 priv->wmm.queue_priority[0] = WMM_AC_VO;
171 priv->wmm.queue_priority[1] = WMM_AC_VI;
172 priv->wmm.queue_priority[2] = WMM_AC_BE;
173 priv->wmm.queue_priority[3] = WMM_AC_BK;
174}
175
176/*
177 * This function map ACs to TIDs.
178 */
179static void
180mwifiex_wmm_queue_priorities_tid(struct mwifiex_wmm_desc *wmm)
181{
182 u8 *queue_priority = wmm->queue_priority;
183 int i;
184
185 for (i = 0; i < 4; ++i) {
186 tos_to_tid[7 - (i * 2)] = ac_to_tid[queue_priority[i]][1];
187 tos_to_tid[6 - (i * 2)] = ac_to_tid[queue_priority[i]][0];
188 }
189
190 for (i = 0; i < MAX_NUM_TID; ++i)
191 tos_to_tid_inv[tos_to_tid[i]] = (u8)i;
192
193 atomic_set(&wmm->highest_queued_prio, HIGH_PRIO_TID);
194}
195
196/*
197 * This function initializes WMM priority queues.
198 */
199void
200mwifiex_wmm_setup_queue_priorities(struct mwifiex_private *priv,
201 struct ieee_types_wmm_parameter *wmm_ie)
202{
203 u16 cw_min, avg_back_off, tmp[4];
204 u32 i, j, num_ac;
205 u8 ac_idx;
206
207 if (!wmm_ie || !priv->wmm_enabled) {
208 /* WMM is not enabled, just set the defaults and return */
209 mwifiex_wmm_default_queue_priorities(priv);
210 return;
211 }
212
213 dev_dbg(priv->adapter->dev, "info: WMM Parameter IE: version=%d, "
214 "qos_info Parameter Set Count=%d, Reserved=%#x\n",
215 wmm_ie->vend_hdr.version, wmm_ie->qos_info_bitmap &
216 IEEE80211_WMM_IE_AP_QOSINFO_PARAM_SET_CNT_MASK,
217 wmm_ie->reserved);
218
219 for (num_ac = 0; num_ac < ARRAY_SIZE(wmm_ie->ac_params); num_ac++) {
220 cw_min = (1 << (wmm_ie->ac_params[num_ac].ecw_bitmap &
221 MWIFIEX_ECW_MIN)) - 1;
222 avg_back_off = (cw_min >> 1) +
223 (wmm_ie->ac_params[num_ac].aci_aifsn_bitmap &
224 MWIFIEX_AIFSN);
225
226 ac_idx = wmm_aci_to_qidx_map[(wmm_ie->ac_params[num_ac].
227 aci_aifsn_bitmap &
228 MWIFIEX_ACI) >> 5];
229 priv->wmm.queue_priority[ac_idx] = ac_idx;
230 tmp[ac_idx] = avg_back_off;
231
232 dev_dbg(priv->adapter->dev, "info: WMM: CWmax=%d CWmin=%d Avg Back-off=%d\n",
233 (1 << ((wmm_ie->ac_params[num_ac].ecw_bitmap &
234 MWIFIEX_ECW_MAX) >> 4)) - 1,
235 cw_min, avg_back_off);
236 mwifiex_wmm_ac_debug_print(&wmm_ie->ac_params[num_ac]);
237 }
238
239 /* Bubble sort */
240 for (i = 0; i < num_ac; i++) {
241 for (j = 1; j < num_ac - i; j++) {
242 if (tmp[j - 1] > tmp[j]) {
243 swap(tmp[j - 1], tmp[j]);
244 swap(priv->wmm.queue_priority[j - 1],
245 priv->wmm.queue_priority[j]);
246 } else if (tmp[j - 1] == tmp[j]) {
247 if (priv->wmm.queue_priority[j - 1]
248 < priv->wmm.queue_priority[j])
249 swap(priv->wmm.queue_priority[j - 1],
250 priv->wmm.queue_priority[j]);
251 }
252 }
253 }
254
255 mwifiex_wmm_queue_priorities_tid(&priv->wmm);
256}
257
258/*
259 * This function evaluates whether or not an AC is to be downgraded.
260 *
261 * In case the AC is not enabled, the highest AC is returned that is
262 * enabled and does not require admission control.
263 */
264static enum mwifiex_wmm_ac_e
265mwifiex_wmm_eval_downgrade_ac(struct mwifiex_private *priv,
266 enum mwifiex_wmm_ac_e eval_ac)
267{
268 int down_ac;
269 enum mwifiex_wmm_ac_e ret_ac;
270 struct mwifiex_wmm_ac_status *ac_status;
271
272 ac_status = &priv->wmm.ac_status[eval_ac];
273
274 if (!ac_status->disabled)
275 /* Okay to use this AC, its enabled */
276 return eval_ac;
277
278 /* Setup a default return value of the lowest priority */
279 ret_ac = WMM_AC_BK;
280
281 /*
282 * Find the highest AC that is enabled and does not require
283 * admission control. The spec disallows downgrading to an AC,
284 * which is enabled due to a completed admission control.
285 * Unadmitted traffic is not to be sent on an AC with admitted
286 * traffic.
287 */
288 for (down_ac = WMM_AC_BK; down_ac < eval_ac; down_ac++) {
289 ac_status = &priv->wmm.ac_status[down_ac];
290
291 if (!ac_status->disabled && !ac_status->flow_required)
292 /* AC is enabled and does not require admission
293 control */
294 ret_ac = (enum mwifiex_wmm_ac_e) down_ac;
295 }
296
297 return ret_ac;
298}
299
300/*
301 * This function downgrades WMM priority queue.
302 */
303void
304mwifiex_wmm_setup_ac_downgrade(struct mwifiex_private *priv)
305{
306 int ac_val;
307
308 dev_dbg(priv->adapter->dev, "info: WMM: AC Priorities:"
309 "BK(0), BE(1), VI(2), VO(3)\n");
310
311 if (!priv->wmm_enabled) {
312 /* WMM is not enabled, default priorities */
313 for (ac_val = WMM_AC_BK; ac_val <= WMM_AC_VO; ac_val++)
314 priv->wmm.ac_down_graded_vals[ac_val] =
315 (enum mwifiex_wmm_ac_e) ac_val;
316 } else {
317 for (ac_val = WMM_AC_BK; ac_val <= WMM_AC_VO; ac_val++) {
318 priv->wmm.ac_down_graded_vals[ac_val]
319 = mwifiex_wmm_eval_downgrade_ac(priv,
320 (enum mwifiex_wmm_ac_e) ac_val);
321 dev_dbg(priv->adapter->dev, "info: WMM: AC PRIO %d maps to %d\n",
322 ac_val, priv->wmm.ac_down_graded_vals[ac_val]);
323 }
324 }
325}
326
327/*
328 * This function converts the IP TOS field to an WMM AC
329 * Queue assignment.
330 */
331static enum mwifiex_wmm_ac_e
332mwifiex_wmm_convert_tos_to_ac(struct mwifiex_adapter *adapter, u32 tos)
333{
334 /* Map of TOS UP values to WMM AC */
335 const enum mwifiex_wmm_ac_e tos_to_ac[] = { WMM_AC_BE,
336 WMM_AC_BK,
337 WMM_AC_BK,
338 WMM_AC_BE,
339 WMM_AC_VI,
340 WMM_AC_VI,
341 WMM_AC_VO,
342 WMM_AC_VO
343 };
344
345 if (tos >= ARRAY_SIZE(tos_to_ac))
346 return WMM_AC_BE;
347
348 return tos_to_ac[tos];
349}
350
351/*
352 * This function evaluates a given TID and downgrades it to a lower
353 * TID if the WMM Parameter IE received from the AP indicates that the
354 * AP is disabled (due to call admission control (ACM bit). Mapping
355 * of TID to AC is taken care of internally.
356 */
357static u8
358mwifiex_wmm_downgrade_tid(struct mwifiex_private *priv, u32 tid)
359{
360 enum mwifiex_wmm_ac_e ac, ac_down;
361 u8 new_tid;
362
363 ac = mwifiex_wmm_convert_tos_to_ac(priv->adapter, tid);
364 ac_down = priv->wmm.ac_down_graded_vals[ac];
365
366 /* Send the index to tid array, picking from the array will be
367 * taken care by dequeuing function
368 */
369 new_tid = ac_to_tid[ac_down][tid % 2];
370
371 return new_tid;
372}
373
374/*
375 * This function initializes the WMM state information and the
376 * WMM data path queues.
377 */
378void
379mwifiex_wmm_init(struct mwifiex_adapter *adapter)
380{
381 int i, j;
382 struct mwifiex_private *priv;
383
384 for (j = 0; j < adapter->priv_num; ++j) {
385 priv = adapter->priv[j];
386 if (!priv)
387 continue;
388
389 for (i = 0; i < MAX_NUM_TID; ++i) {
390 priv->aggr_prio_tbl[i].amsdu = tos_to_tid_inv[i];
391 priv->aggr_prio_tbl[i].ampdu_ap = tos_to_tid_inv[i];
392 priv->aggr_prio_tbl[i].ampdu_user = tos_to_tid_inv[i];
393 priv->wmm.tid_tbl_ptr[i].ra_list_curr = NULL;
394 }
395
396 priv->aggr_prio_tbl[6].amsdu
397 = priv->aggr_prio_tbl[6].ampdu_ap
398 = priv->aggr_prio_tbl[6].ampdu_user
399 = BA_STREAM_NOT_ALLOWED;
400
401 priv->aggr_prio_tbl[7].amsdu = priv->aggr_prio_tbl[7].ampdu_ap
402 = priv->aggr_prio_tbl[7].ampdu_user
403 = BA_STREAM_NOT_ALLOWED;
404
405 priv->add_ba_param.timeout = MWIFIEX_DEFAULT_BLOCK_ACK_TIMEOUT;
406 priv->add_ba_param.tx_win_size = MWIFIEX_AMPDU_DEF_TXWINSIZE;
407 priv->add_ba_param.rx_win_size = MWIFIEX_AMPDU_DEF_RXWINSIZE;
408
409 atomic_set(&priv->wmm.tx_pkts_queued, 0);
410 atomic_set(&priv->wmm.highest_queued_prio, HIGH_PRIO_TID);
411 }
412}
413
414/*
415 * This function checks if WMM Tx queue is empty.
416 */
417int
418mwifiex_wmm_lists_empty(struct mwifiex_adapter *adapter)
419{
420 int i;
421 struct mwifiex_private *priv;
422
423 for (i = 0; i < adapter->priv_num; ++i) {
424 priv = adapter->priv[i];
425 if (priv && atomic_read(&priv->wmm.tx_pkts_queued))
426 return false;
427 }
428
429 return true;
430}
431
432/*
433 * This function deletes all packets in an RA list node.
434 *
435 * The packet sent completion callback handler are called with
436 * status failure, after they are dequeued to ensure proper
437 * cleanup. The RA list node itself is freed at the end.
438 */
439static void
440mwifiex_wmm_del_pkts_in_ralist_node(struct mwifiex_private *priv,
441 struct mwifiex_ra_list_tbl *ra_list)
442{
443 struct mwifiex_adapter *adapter = priv->adapter;
444 struct sk_buff *skb, *tmp;
445
446 skb_queue_walk_safe(&ra_list->skb_head, skb, tmp)
447 mwifiex_write_data_complete(adapter, skb, -1);
448}
449
450/*
451 * This function deletes all packets in an RA list.
452 *
453 * Each nodes in the RA list are freed individually first, and then
454 * the RA list itself is freed.
455 */
456static void
457mwifiex_wmm_del_pkts_in_ralist(struct mwifiex_private *priv,
458 struct list_head *ra_list_head)
459{
460 struct mwifiex_ra_list_tbl *ra_list;
461
462 list_for_each_entry(ra_list, ra_list_head, list)
463 mwifiex_wmm_del_pkts_in_ralist_node(priv, ra_list);
464}
465
466/*
467 * This function deletes all packets in all RA lists.
468 */
469static void mwifiex_wmm_cleanup_queues(struct mwifiex_private *priv)
470{
471 int i;
472
473 for (i = 0; i < MAX_NUM_TID; i++)
474 mwifiex_wmm_del_pkts_in_ralist(priv, &priv->wmm.tid_tbl_ptr[i].
475 ra_list);
476
477 atomic_set(&priv->wmm.tx_pkts_queued, 0);
478 atomic_set(&priv->wmm.highest_queued_prio, HIGH_PRIO_TID);
479}
480
481/*
482 * This function deletes all route addresses from all RA lists.
483 */
484static void mwifiex_wmm_delete_all_ralist(struct mwifiex_private *priv)
485{
486 struct mwifiex_ra_list_tbl *ra_list, *tmp_node;
487 int i;
488
489 for (i = 0; i < MAX_NUM_TID; ++i) {
490 dev_dbg(priv->adapter->dev,
491 "info: ra_list: freeing buf for tid %d\n", i);
492 list_for_each_entry_safe(ra_list, tmp_node,
493 &priv->wmm.tid_tbl_ptr[i].ra_list, list) {
494 list_del(&ra_list->list);
495 kfree(ra_list);
496 }
497
498 INIT_LIST_HEAD(&priv->wmm.tid_tbl_ptr[i].ra_list);
499
500 priv->wmm.tid_tbl_ptr[i].ra_list_curr = NULL;
501 }
502}
503
504/*
505 * This function cleans up the Tx and Rx queues.
506 *
507 * Cleanup includes -
508 * - All packets in RA lists
509 * - All entries in Rx reorder table
510 * - All entries in Tx BA stream table
511 * - MPA buffer (if required)
512 * - All RA lists
513 */
514void
515mwifiex_clean_txrx(struct mwifiex_private *priv)
516{
517 unsigned long flags;
518
519 mwifiex_11n_cleanup_reorder_tbl(priv);
520 spin_lock_irqsave(&priv->wmm.ra_list_spinlock, flags);
521
522 mwifiex_wmm_cleanup_queues(priv);
523 mwifiex_11n_delete_all_tx_ba_stream_tbl(priv);
524
525 if (priv->adapter->if_ops.cleanup_mpa_buf)
526 priv->adapter->if_ops.cleanup_mpa_buf(priv->adapter);
527
528 mwifiex_wmm_delete_all_ralist(priv);
529 memcpy(tos_to_tid, ac_to_tid, sizeof(tos_to_tid));
530
531 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, flags);
532}
533
534/*
535 * This function retrieves a particular RA list node, matching with the
536 * given TID and RA address.
537 */
538static struct mwifiex_ra_list_tbl *
539mwifiex_wmm_get_ralist_node(struct mwifiex_private *priv, u8 tid,
540 u8 *ra_addr)
541{
542 struct mwifiex_ra_list_tbl *ra_list;
543
544 list_for_each_entry(ra_list, &priv->wmm.tid_tbl_ptr[tid].ra_list,
545 list) {
546 if (!memcmp(ra_list->ra, ra_addr, ETH_ALEN))
547 return ra_list;
548 }
549
550 return NULL;
551}
552
553/*
554 * This function retrieves an RA list node for a given TID and
555 * RA address pair.
556 *
557 * If no such node is found, a new node is added first and then
558 * retrieved.
559 */
560static struct mwifiex_ra_list_tbl *
561mwifiex_wmm_get_queue_raptr(struct mwifiex_private *priv, u8 tid, u8 *ra_addr)
562{
563 struct mwifiex_ra_list_tbl *ra_list;
564
565 ra_list = mwifiex_wmm_get_ralist_node(priv, tid, ra_addr);
566 if (ra_list)
567 return ra_list;
568 mwifiex_ralist_add(priv, ra_addr);
569
570 return mwifiex_wmm_get_ralist_node(priv, tid, ra_addr);
571}
572
573/*
574 * This function checks if a particular RA list node exists in a given TID
575 * table index.
576 */
577int
578mwifiex_is_ralist_valid(struct mwifiex_private *priv,
579 struct mwifiex_ra_list_tbl *ra_list, int ptr_index)
580{
581 struct mwifiex_ra_list_tbl *rlist;
582
583 list_for_each_entry(rlist, &priv->wmm.tid_tbl_ptr[ptr_index].ra_list,
584 list) {
585 if (rlist == ra_list)
586 return true;
587 }
588
589 return false;
590}
591
592/*
593 * This function adds a packet to WMM queue.
594 *
595 * In disconnected state the packet is immediately dropped and the
596 * packet send completion callback is called with status failure.
597 *
598 * Otherwise, the correct RA list node is located and the packet
599 * is queued at the list tail.
600 */
601void
602mwifiex_wmm_add_buf_txqueue(struct mwifiex_adapter *adapter,
603 struct sk_buff *skb)
604{
605 struct mwifiex_txinfo *tx_info = MWIFIEX_SKB_TXCB(skb);
606 struct mwifiex_private *priv = adapter->priv[tx_info->bss_index];
607 u32 tid;
608 struct mwifiex_ra_list_tbl *ra_list;
609 u8 ra[ETH_ALEN], tid_down;
610 unsigned long flags;
611
612 if (!priv->media_connected) {
613 dev_dbg(adapter->dev, "data: drop packet in disconnect\n");
614 mwifiex_write_data_complete(adapter, skb, -1);
615 return;
616 }
617
618 tid = skb->priority;
619
620 spin_lock_irqsave(&priv->wmm.ra_list_spinlock, flags);
621
622 tid_down = mwifiex_wmm_downgrade_tid(priv, tid);
623
624 /* In case of infra as we have already created the list during
625 association we just don't have to call get_queue_raptr, we will
626 have only 1 raptr for a tid in case of infra */
627 if (!mwifiex_queuing_ra_based(priv)) {
628 if (!list_empty(&priv->wmm.tid_tbl_ptr[tid_down].ra_list))
629 ra_list = list_first_entry(
630 &priv->wmm.tid_tbl_ptr[tid_down].ra_list,
631 struct mwifiex_ra_list_tbl, list);
632 else
633 ra_list = NULL;
634 } else {
635 memcpy(ra, skb->data, ETH_ALEN);
636 ra_list = mwifiex_wmm_get_queue_raptr(priv, tid_down, ra);
637 }
638
639 if (!ra_list) {
640 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, flags);
641 mwifiex_write_data_complete(adapter, skb, -1);
642 return;
643 }
644
645 skb_queue_tail(&ra_list->skb_head, skb);
646
647 ra_list->total_pkts_size += skb->len;
648
649 atomic_inc(&priv->wmm.tx_pkts_queued);
650
651 if (atomic_read(&priv->wmm.highest_queued_prio) <
652 tos_to_tid_inv[tid_down])
653 atomic_set(&priv->wmm.highest_queued_prio,
654 tos_to_tid_inv[tid_down]);
655
656 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, flags);
657}
658
659/*
660 * This function processes the get WMM status command response from firmware.
661 *
662 * The response may contain multiple TLVs -
663 * - AC Queue status TLVs
664 * - Current WMM Parameter IE TLV
665 * - Admission Control action frame TLVs
666 *
667 * This function parses the TLVs and then calls further specific functions
668 * to process any changes in the queue prioritize or state.
669 */
670int mwifiex_ret_wmm_get_status(struct mwifiex_private *priv,
671 const struct host_cmd_ds_command *resp)
672{
673 u8 *curr = (u8 *) &resp->params.get_wmm_status;
674 uint16_t resp_len = le16_to_cpu(resp->size), tlv_len;
675 int valid = true;
676
677 struct mwifiex_ie_types_data *tlv_hdr;
678 struct mwifiex_ie_types_wmm_queue_status *tlv_wmm_qstatus;
679 struct ieee_types_wmm_parameter *wmm_param_ie = NULL;
680 struct mwifiex_wmm_ac_status *ac_status;
681
682 dev_dbg(priv->adapter->dev, "info: WMM: WMM_GET_STATUS cmdresp received: %d\n",
683 resp_len);
684
685 while ((resp_len >= sizeof(tlv_hdr->header)) && valid) {
686 tlv_hdr = (struct mwifiex_ie_types_data *) curr;
687 tlv_len = le16_to_cpu(tlv_hdr->header.len);
688
689 switch (le16_to_cpu(tlv_hdr->header.type)) {
690 case TLV_TYPE_WMMQSTATUS:
691 tlv_wmm_qstatus =
692 (struct mwifiex_ie_types_wmm_queue_status *)
693 tlv_hdr;
694 dev_dbg(priv->adapter->dev,
695 "info: CMD_RESP: WMM_GET_STATUS:"
696 " QSTATUS TLV: %d, %d, %d\n",
697 tlv_wmm_qstatus->queue_index,
698 tlv_wmm_qstatus->flow_required,
699 tlv_wmm_qstatus->disabled);
700
701 ac_status = &priv->wmm.ac_status[tlv_wmm_qstatus->
702 queue_index];
703 ac_status->disabled = tlv_wmm_qstatus->disabled;
704 ac_status->flow_required =
705 tlv_wmm_qstatus->flow_required;
706 ac_status->flow_created = tlv_wmm_qstatus->flow_created;
707 break;
708
709 case WLAN_EID_VENDOR_SPECIFIC:
710 /*
711 * Point the regular IEEE IE 2 bytes into the Marvell IE
712 * and setup the IEEE IE type and length byte fields
713 */
714
715 wmm_param_ie =
716 (struct ieee_types_wmm_parameter *) (curr +
717 2);
718 wmm_param_ie->vend_hdr.len = (u8) tlv_len;
719 wmm_param_ie->vend_hdr.element_id =
720 WLAN_EID_VENDOR_SPECIFIC;
721
722 dev_dbg(priv->adapter->dev,
723 "info: CMD_RESP: WMM_GET_STATUS:"
724 " WMM Parameter Set Count: %d\n",
725 wmm_param_ie->qos_info_bitmap &
726 IEEE80211_WMM_IE_AP_QOSINFO_PARAM_SET_CNT_MASK);
727
728 memcpy((u8 *) &priv->curr_bss_params.bss_descriptor.
729 wmm_ie, wmm_param_ie,
730 wmm_param_ie->vend_hdr.len + 2);
731
732 break;
733
734 default:
735 valid = false;
736 break;
737 }
738
739 curr += (tlv_len + sizeof(tlv_hdr->header));
740 resp_len -= (tlv_len + sizeof(tlv_hdr->header));
741 }
742
743 mwifiex_wmm_setup_queue_priorities(priv, wmm_param_ie);
744 mwifiex_wmm_setup_ac_downgrade(priv);
745
746 return 0;
747}
748
749/*
750 * Callback handler from the command module to allow insertion of a WMM TLV.
751 *
752 * If the BSS we are associating to supports WMM, this function adds the
753 * required WMM Information IE to the association request command buffer in
754 * the form of a Marvell extended IEEE IE.
755 */
756u32
757mwifiex_wmm_process_association_req(struct mwifiex_private *priv,
758 u8 **assoc_buf,
759 struct ieee_types_wmm_parameter *wmm_ie,
760 struct ieee80211_ht_cap *ht_cap)
761{
762 struct mwifiex_ie_types_wmm_param_set *wmm_tlv;
763 u32 ret_len = 0;
764
765 /* Null checks */
766 if (!assoc_buf)
767 return 0;
768 if (!(*assoc_buf))
769 return 0;
770
771 if (!wmm_ie)
772 return 0;
773
774 dev_dbg(priv->adapter->dev, "info: WMM: process assoc req:"
775 "bss->wmmIe=0x%x\n",
776 wmm_ie->vend_hdr.element_id);
777
778 if ((priv->wmm_required
779 || (ht_cap && (priv->adapter->config_bands & BAND_GN
780 || priv->adapter->config_bands & BAND_AN))
781 )
782 && wmm_ie->vend_hdr.element_id == WLAN_EID_VENDOR_SPECIFIC) {
783 wmm_tlv = (struct mwifiex_ie_types_wmm_param_set *) *assoc_buf;
784 wmm_tlv->header.type = cpu_to_le16((u16) wmm_info_ie[0]);
785 wmm_tlv->header.len = cpu_to_le16((u16) wmm_info_ie[1]);
786 memcpy(wmm_tlv->wmm_ie, &wmm_info_ie[2],
787 le16_to_cpu(wmm_tlv->header.len));
788 if (wmm_ie->qos_info_bitmap & IEEE80211_WMM_IE_AP_QOSINFO_UAPSD)
789 memcpy((u8 *) (wmm_tlv->wmm_ie
790 + le16_to_cpu(wmm_tlv->header.len)
791 - sizeof(priv->wmm_qosinfo)),
792 &priv->wmm_qosinfo,
793 sizeof(priv->wmm_qosinfo));
794
795 ret_len = sizeof(wmm_tlv->header)
796 + le16_to_cpu(wmm_tlv->header.len);
797
798 *assoc_buf += ret_len;
799 }
800
801 return ret_len;
802}
803
804/*
805 * This function computes the time delay in the driver queues for a
806 * given packet.
807 *
808 * When the packet is received at the OS/Driver interface, the current
809 * time is set in the packet structure. The difference between the present
810 * time and that received time is computed in this function and limited
811 * based on pre-compiled limits in the driver.
812 */
813u8
814mwifiex_wmm_compute_drv_pkt_delay(struct mwifiex_private *priv,
815 const struct sk_buff *skb)
816{
817 u8 ret_val;
818 struct timeval out_tstamp, in_tstamp;
819 u32 queue_delay;
820
821 do_gettimeofday(&out_tstamp);
822 in_tstamp = ktime_to_timeval(skb->tstamp);
823
824 queue_delay = (out_tstamp.tv_sec - in_tstamp.tv_sec) * 1000;
825 queue_delay += (out_tstamp.tv_usec - in_tstamp.tv_usec) / 1000;
826
827 /*
828 * Queue delay is passed as a uint8 in units of 2ms (ms shifted
829 * by 1). Min value (other than 0) is therefore 2ms, max is 510ms.
830 *
831 * Pass max value if queue_delay is beyond the uint8 range
832 */
833 ret_val = (u8) (min(queue_delay, priv->wmm.drv_pkt_delay_max) >> 1);
834
835 dev_dbg(priv->adapter->dev, "data: WMM: Pkt Delay: %d ms,"
836 " %d ms sent to FW\n", queue_delay, ret_val);
837
838 return ret_val;
839}
840
841/*
842 * This function retrieves the highest priority RA list table pointer.
843 */
844static struct mwifiex_ra_list_tbl *
845mwifiex_wmm_get_highest_priolist_ptr(struct mwifiex_adapter *adapter,
846 struct mwifiex_private **priv, int *tid)
847{
848 struct mwifiex_private *priv_tmp;
849 struct mwifiex_ra_list_tbl *ptr, *head;
850 struct mwifiex_bss_prio_node *bssprio_node, *bssprio_head;
851 struct mwifiex_tid_tbl *tid_ptr;
852 int is_list_empty;
853 unsigned long flags;
854 int i, j;
855
856 for (j = adapter->priv_num - 1; j >= 0; --j) {
857 spin_lock_irqsave(&adapter->bss_prio_tbl[j].bss_prio_lock,
858 flags);
859 is_list_empty = list_empty(&adapter->bss_prio_tbl[j]
860 .bss_prio_head);
861 spin_unlock_irqrestore(&adapter->bss_prio_tbl[j].bss_prio_lock,
862 flags);
863 if (is_list_empty)
864 continue;
865
866 if (adapter->bss_prio_tbl[j].bss_prio_cur ==
867 (struct mwifiex_bss_prio_node *)
868 &adapter->bss_prio_tbl[j].bss_prio_head) {
869 bssprio_node =
870 list_first_entry(&adapter->bss_prio_tbl[j]
871 .bss_prio_head,
872 struct mwifiex_bss_prio_node,
873 list);
874 bssprio_head = bssprio_node;
875 } else {
876 bssprio_node = adapter->bss_prio_tbl[j].bss_prio_cur;
877 bssprio_head = bssprio_node;
878 }
879
880 do {
881 atomic_t *hqp;
882 spinlock_t *lock;
883
884 priv_tmp = bssprio_node->priv;
885 hqp = &priv_tmp->wmm.highest_queued_prio;
886 lock = &priv_tmp->wmm.ra_list_spinlock;
887
888 for (i = atomic_read(hqp); i >= LOW_PRIO_TID; --i) {
889
890 tid_ptr = &(priv_tmp)->wmm.
891 tid_tbl_ptr[tos_to_tid[i]];
892
893 spin_lock_irqsave(&tid_ptr->tid_tbl_lock,
894 flags);
895 is_list_empty =
896 list_empty(&adapter->bss_prio_tbl[j]
897 .bss_prio_head);
898 spin_unlock_irqrestore(&tid_ptr->tid_tbl_lock,
899 flags);
900 if (is_list_empty)
901 continue;
902
903 /*
904 * Always choose the next ra we transmitted
905 * last time, this way we pick the ra's in
906 * round robin fashion.
907 */
908 ptr = list_first_entry(
909 &tid_ptr->ra_list_curr->list,
910 struct mwifiex_ra_list_tbl,
911 list);
912
913 head = ptr;
914 if (ptr == (struct mwifiex_ra_list_tbl *)
915 &tid_ptr->ra_list) {
916 /* Get next ra */
917 ptr = list_first_entry(&ptr->list,
918 struct mwifiex_ra_list_tbl, list);
919 head = ptr;
920 }
921
922 do {
923 is_list_empty =
924 skb_queue_empty(&ptr->skb_head);
925 if (!is_list_empty) {
926 spin_lock_irqsave(lock, flags);
927 if (atomic_read(hqp) > i)
928 atomic_set(hqp, i);
929 spin_unlock_irqrestore(lock,
930 flags);
931 *priv = priv_tmp;
932 *tid = tos_to_tid[i];
933 return ptr;
934 }
935 /* Get next ra */
936 ptr = list_first_entry(&ptr->list,
937 struct mwifiex_ra_list_tbl,
938 list);
939 if (ptr ==
940 (struct mwifiex_ra_list_tbl *)
941 &tid_ptr->ra_list)
942 ptr = list_first_entry(
943 &ptr->list,
944 struct mwifiex_ra_list_tbl,
945 list);
946 } while (ptr != head);
947 }
948
949 /* No packet at any TID for this priv. Mark as such
950 * to skip checking TIDs for this priv (until pkt is
951 * added).
952 */
953 atomic_set(hqp, NO_PKT_PRIO_TID);
954
955 /* Get next bss priority node */
956 bssprio_node = list_first_entry(&bssprio_node->list,
957 struct mwifiex_bss_prio_node,
958 list);
959
960 if (bssprio_node ==
961 (struct mwifiex_bss_prio_node *)
962 &adapter->bss_prio_tbl[j].bss_prio_head)
963 /* Get next bss priority node */
964 bssprio_node = list_first_entry(
965 &bssprio_node->list,
966 struct mwifiex_bss_prio_node,
967 list);
968 } while (bssprio_node != bssprio_head);
969 }
970 return NULL;
971}
972
973/*
974 * This function gets the number of packets in the Tx queue of a
975 * particular RA list.
976 */
977static int
978mwifiex_num_pkts_in_txq(struct mwifiex_private *priv,
979 struct mwifiex_ra_list_tbl *ptr, int max_buf_size)
980{
981 int count = 0, total_size = 0;
982 struct sk_buff *skb, *tmp;
983
984 skb_queue_walk_safe(&ptr->skb_head, skb, tmp) {
985 total_size += skb->len;
986 if (total_size < max_buf_size)
987 ++count;
988 else
989 break;
990 }
991
992 return count;
993}
994
995/*
996 * This function sends a single packet to firmware for transmission.
997 */
998static void
999mwifiex_send_single_packet(struct mwifiex_private *priv,
1000 struct mwifiex_ra_list_tbl *ptr, int ptr_index,
1001 unsigned long ra_list_flags)
1002 __releases(&priv->wmm.ra_list_spinlock)
1003{
1004 struct sk_buff *skb, *skb_next;
1005 struct mwifiex_tx_param tx_param;
1006 struct mwifiex_adapter *adapter = priv->adapter;
1007 struct mwifiex_txinfo *tx_info;
1008
1009 if (skb_queue_empty(&ptr->skb_head)) {
1010 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
1011 ra_list_flags);
1012 dev_dbg(adapter->dev, "data: nothing to send\n");
1013 return;
1014 }
1015
1016 skb = skb_dequeue(&ptr->skb_head);
1017
1018 tx_info = MWIFIEX_SKB_TXCB(skb);
1019 dev_dbg(adapter->dev, "data: dequeuing the packet %p %p\n", ptr, skb);
1020
1021 ptr->total_pkts_size -= skb->len;
1022
1023 if (!skb_queue_empty(&ptr->skb_head))
1024 skb_next = skb_peek(&ptr->skb_head);
1025 else
1026 skb_next = NULL;
1027
1028 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, ra_list_flags);
1029
1030 tx_param.next_pkt_len = ((skb_next) ? skb_next->len +
1031 sizeof(struct txpd) : 0);
1032
1033 if (mwifiex_process_tx(priv, skb, &tx_param) == -EBUSY) {
1034 /* Queue the packet back at the head */
1035 spin_lock_irqsave(&priv->wmm.ra_list_spinlock, ra_list_flags);
1036
1037 if (!mwifiex_is_ralist_valid(priv, ptr, ptr_index)) {
1038 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
1039 ra_list_flags);
1040 mwifiex_write_data_complete(adapter, skb, -1);
1041 return;
1042 }
1043
1044 skb_queue_tail(&ptr->skb_head, skb);
1045
1046 ptr->total_pkts_size += skb->len;
1047 tx_info->flags |= MWIFIEX_BUF_FLAG_REQUEUED_PKT;
1048 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
1049 ra_list_flags);
1050 } else {
1051 spin_lock_irqsave(&priv->wmm.ra_list_spinlock, ra_list_flags);
1052 if (mwifiex_is_ralist_valid(priv, ptr, ptr_index)) {
1053 priv->wmm.packets_out[ptr_index]++;
1054 priv->wmm.tid_tbl_ptr[ptr_index].ra_list_curr = ptr;
1055 }
1056 adapter->bss_prio_tbl[priv->bss_priority].bss_prio_cur =
1057 list_first_entry(
1058 &adapter->bss_prio_tbl[priv->bss_priority]
1059 .bss_prio_cur->list,
1060 struct mwifiex_bss_prio_node,
1061 list);
1062 atomic_dec(&priv->wmm.tx_pkts_queued);
1063 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
1064 ra_list_flags);
1065 }
1066}
1067
1068/*
1069 * This function checks if the first packet in the given RA list
1070 * is already processed or not.
1071 */
1072static int
1073mwifiex_is_ptr_processed(struct mwifiex_private *priv,
1074 struct mwifiex_ra_list_tbl *ptr)
1075{
1076 struct sk_buff *skb;
1077 struct mwifiex_txinfo *tx_info;
1078
1079 if (skb_queue_empty(&ptr->skb_head))
1080 return false;
1081
1082 skb = skb_peek(&ptr->skb_head);
1083
1084 tx_info = MWIFIEX_SKB_TXCB(skb);
1085 if (tx_info->flags & MWIFIEX_BUF_FLAG_REQUEUED_PKT)
1086 return true;
1087
1088 return false;
1089}
1090
1091/*
1092 * This function sends a single processed packet to firmware for
1093 * transmission.
1094 */
1095static void
1096mwifiex_send_processed_packet(struct mwifiex_private *priv,
1097 struct mwifiex_ra_list_tbl *ptr, int ptr_index,
1098 unsigned long ra_list_flags)
1099 __releases(&priv->wmm.ra_list_spinlock)
1100{
1101 struct mwifiex_tx_param tx_param;
1102 struct mwifiex_adapter *adapter = priv->adapter;
1103 int ret = -1;
1104 struct sk_buff *skb, *skb_next;
1105 struct mwifiex_txinfo *tx_info;
1106
1107 if (skb_queue_empty(&ptr->skb_head)) {
1108 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
1109 ra_list_flags);
1110 return;
1111 }
1112
1113 skb = skb_dequeue(&ptr->skb_head);
1114
1115 if (!skb_queue_empty(&ptr->skb_head))
1116 skb_next = skb_peek(&ptr->skb_head);
1117 else
1118 skb_next = NULL;
1119
1120 tx_info = MWIFIEX_SKB_TXCB(skb);
1121
1122 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, ra_list_flags);
1123 tx_param.next_pkt_len =
1124 ((skb_next) ? skb_next->len +
1125 sizeof(struct txpd) : 0);
1126 ret = adapter->if_ops.host_to_card(adapter, MWIFIEX_TYPE_DATA,
1127 skb->data, skb->len, &tx_param);
1128 switch (ret) {
1129 case -EBUSY:
1130 dev_dbg(adapter->dev, "data: -EBUSY is returned\n");
1131 spin_lock_irqsave(&priv->wmm.ra_list_spinlock, ra_list_flags);
1132
1133 if (!mwifiex_is_ralist_valid(priv, ptr, ptr_index)) {
1134 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
1135 ra_list_flags);
1136 mwifiex_write_data_complete(adapter, skb, -1);
1137 return;
1138 }
1139
1140 skb_queue_tail(&ptr->skb_head, skb);
1141
1142 tx_info->flags |= MWIFIEX_BUF_FLAG_REQUEUED_PKT;
1143 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
1144 ra_list_flags);
1145 break;
1146 case -1:
1147 adapter->data_sent = false;
1148 dev_err(adapter->dev, "host_to_card failed: %#x\n", ret);
1149 adapter->dbg.num_tx_host_to_card_failure++;
1150 mwifiex_write_data_complete(adapter, skb, ret);
1151 break;
1152 case -EINPROGRESS:
1153 adapter->data_sent = false;
1154 default:
1155 break;
1156 }
1157 if (ret != -EBUSY) {
1158 spin_lock_irqsave(&priv->wmm.ra_list_spinlock, ra_list_flags);
1159 if (mwifiex_is_ralist_valid(priv, ptr, ptr_index)) {
1160 priv->wmm.packets_out[ptr_index]++;
1161 priv->wmm.tid_tbl_ptr[ptr_index].ra_list_curr = ptr;
1162 }
1163 adapter->bss_prio_tbl[priv->bss_priority].bss_prio_cur =
1164 list_first_entry(
1165 &adapter->bss_prio_tbl[priv->bss_priority]
1166 .bss_prio_cur->list,
1167 struct mwifiex_bss_prio_node,
1168 list);
1169 atomic_dec(&priv->wmm.tx_pkts_queued);
1170 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
1171 ra_list_flags);
1172 }
1173}
1174
1175/*
1176 * This function dequeues a packet from the highest priority list
1177 * and transmits it.
1178 */
1179static int
1180mwifiex_dequeue_tx_packet(struct mwifiex_adapter *adapter)
1181{
1182 struct mwifiex_ra_list_tbl *ptr;
1183 struct mwifiex_private *priv = NULL;
1184 int ptr_index = 0;
1185 u8 ra[ETH_ALEN];
1186 int tid_del = 0, tid = 0;
1187 unsigned long flags;
1188
1189 ptr = mwifiex_wmm_get_highest_priolist_ptr(adapter, &priv, &ptr_index);
1190 if (!ptr)
1191 return -1;
1192
1193 tid = mwifiex_get_tid(ptr);
1194
1195 dev_dbg(adapter->dev, "data: tid=%d\n", tid);
1196
1197 spin_lock_irqsave(&priv->wmm.ra_list_spinlock, flags);
1198 if (!mwifiex_is_ralist_valid(priv, ptr, ptr_index)) {
1199 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, flags);
1200 return -1;
1201 }
1202
1203 if (mwifiex_is_ptr_processed(priv, ptr)) {
1204 mwifiex_send_processed_packet(priv, ptr, ptr_index, flags);
1205 /* ra_list_spinlock has been freed in
1206 mwifiex_send_processed_packet() */
1207 return 0;
1208 }
1209
1210 if (!ptr->is_11n_enabled || mwifiex_is_ba_stream_setup(priv, ptr, tid)
1211 || ((priv->sec_info.wpa_enabled
1212 || priv->sec_info.wpa2_enabled) && !priv->wpa_is_gtk_set)
1213 ) {
1214 mwifiex_send_single_packet(priv, ptr, ptr_index, flags);
1215 /* ra_list_spinlock has been freed in
1216 mwifiex_send_single_packet() */
1217 } else {
1218 if (mwifiex_is_ampdu_allowed(priv, tid)) {
1219 if (mwifiex_space_avail_for_new_ba_stream(adapter)) {
1220 mwifiex_11n_create_tx_ba_stream_tbl(priv,
1221 ptr->ra, tid,
1222 BA_STREAM_SETUP_INPROGRESS);
1223 mwifiex_send_addba(priv, tid, ptr->ra);
1224 } else if (mwifiex_find_stream_to_delete
1225 (priv, tid, &tid_del, ra)) {
1226 mwifiex_11n_create_tx_ba_stream_tbl(priv,
1227 ptr->ra, tid,
1228 BA_STREAM_SETUP_INPROGRESS);
1229 mwifiex_send_delba(priv, tid_del, ra, 1);
1230 }
1231 }
1232/* Minimum number of AMSDU */
1233#define MIN_NUM_AMSDU 2
1234 if (mwifiex_is_amsdu_allowed(priv, tid) &&
1235 (mwifiex_num_pkts_in_txq(priv, ptr, adapter->tx_buf_size) >=
1236 MIN_NUM_AMSDU))
1237 mwifiex_11n_aggregate_pkt(priv, ptr, INTF_HEADER_LEN,
1238 ptr_index, flags);
1239 /* ra_list_spinlock has been freed in
1240 mwifiex_11n_aggregate_pkt() */
1241 else
1242 mwifiex_send_single_packet(priv, ptr, ptr_index, flags);
1243 /* ra_list_spinlock has been freed in
1244 mwifiex_send_single_packet() */
1245 }
1246 return 0;
1247}
1248
1249/*
1250 * This function transmits the highest priority packet awaiting in the
1251 * WMM Queues.
1252 */
1253void
1254mwifiex_wmm_process_tx(struct mwifiex_adapter *adapter)
1255{
1256 do {
1257 /* Check if busy */
1258 if (adapter->data_sent || adapter->tx_lock_flag)
1259 break;
1260
1261 if (mwifiex_dequeue_tx_packet(adapter))
1262 break;
1263 } while (!mwifiex_wmm_lists_empty(adapter));
1264}
generated by cgit v1.2.2 (git 2.25.0) at 2025-04-09 22:03:54 -0400