wireless: mwifiex: initial commit for Marvell mwifiex driver
[linux-2.6.git] / drivers / net / wireless / mwifiex / wmm.c
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 */
41 static const u8 wmm_info_ie[] = { WLAN_EID_VENDOR_SPECIFIC, 0x07,
42         0x00, 0x50, 0xf2, 0x02,
43         0x00, 0x01, 0x00
44 };
45
46 static const u8 wmm_aci_to_qidx_map[] = { WMM_AC_BE,
47         WMM_AC_BK,
48         WMM_AC_VI,
49         WMM_AC_VO
50 };
51
52 static 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  */
69 static 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
79 static 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  */
84 static void
85 mwifiex_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  */
106 static struct mwifiex_ra_list_tbl *
107 mwifiex_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  */
134 void
135 mwifiex_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  */
167 static 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  */
179 static void
180 mwifiex_wmm_queue_priorities_tid(struct mwifiex_private *priv,
181                                  u8 queue_priority[])
182 {
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
191 /*
192  * This function initializes WMM priority queues.
193  */
194 void
195 mwifiex_wmm_setup_queue_priorities(struct mwifiex_private *priv,
196                                    struct ieee_types_wmm_parameter *wmm_ie)
197 {
198         u16 cw_min, avg_back_off, tmp[4];
199         u32 i, j, num_ac;
200         u8 ac_idx;
201
202         if (!wmm_ie || !priv->wmm_enabled) {
203                 /* WMM is not enabled, just set the defaults and return */
204                 mwifiex_wmm_default_queue_priorities(priv);
205                 return;
206         }
207
208         dev_dbg(priv->adapter->dev, "info: WMM Parameter IE: version=%d, "
209                 "qos_info Parameter Set Count=%d, Reserved=%#x\n",
210                 wmm_ie->vend_hdr.version, wmm_ie->qos_info_bitmap &
211                 IEEE80211_WMM_IE_AP_QOSINFO_PARAM_SET_CNT_MASK,
212                 wmm_ie->reserved);
213
214         for (num_ac = 0; num_ac < ARRAY_SIZE(wmm_ie->ac_params); num_ac++) {
215                 cw_min = (1 << (wmm_ie->ac_params[num_ac].ecw_bitmap &
216                         MWIFIEX_ECW_MIN)) - 1;
217                 avg_back_off = (cw_min >> 1) +
218                         (wmm_ie->ac_params[num_ac].aci_aifsn_bitmap &
219                         MWIFIEX_AIFSN);
220
221                 ac_idx = wmm_aci_to_qidx_map[(wmm_ie->ac_params[num_ac].
222                                              aci_aifsn_bitmap &
223                                              MWIFIEX_ACI) >> 5];
224                 priv->wmm.queue_priority[ac_idx] = ac_idx;
225                 tmp[ac_idx] = avg_back_off;
226
227                 dev_dbg(priv->adapter->dev, "info: WMM: CWmax=%d CWmin=%d Avg Back-off=%d\n",
228                        (1 << ((wmm_ie->ac_params[num_ac].ecw_bitmap &
229                        MWIFIEX_ECW_MAX) >> 4)) - 1,
230                        cw_min, avg_back_off);
231                 mwifiex_wmm_ac_debug_print(&wmm_ie->ac_params[num_ac]);
232         }
233
234         /* Bubble sort */
235         for (i = 0; i < num_ac; i++) {
236                 for (j = 1; j < num_ac - i; j++) {
237                         if (tmp[j - 1] > tmp[j]) {
238                                 swap(tmp[j - 1], tmp[j]);
239                                 swap(priv->wmm.queue_priority[j - 1],
240                                      priv->wmm.queue_priority[j]);
241                         } else if (tmp[j - 1] == tmp[j]) {
242                                 if (priv->wmm.queue_priority[j - 1]
243                                     < priv->wmm.queue_priority[j])
244                                         swap(priv->wmm.queue_priority[j - 1],
245                                              priv->wmm.queue_priority[j]);
246                         }
247                 }
248         }
249
250         mwifiex_wmm_queue_priorities_tid(priv, priv->wmm.queue_priority);
251 }
252
253 /*
254  * This function evaluates whether or not an AC is to be downgraded.
255  *
256  * In case the AC is not enabled, the highest AC is returned that is
257  * enabled and does not require admission control.
258  */
259 static enum mwifiex_wmm_ac_e
260 mwifiex_wmm_eval_downgrade_ac(struct mwifiex_private *priv,
261                               enum mwifiex_wmm_ac_e eval_ac)
262 {
263         int down_ac;
264         enum mwifiex_wmm_ac_e ret_ac;
265         struct mwifiex_wmm_ac_status *ac_status;
266
267         ac_status = &priv->wmm.ac_status[eval_ac];
268
269         if (!ac_status->disabled)
270                 /* Okay to use this AC, its enabled */
271                 return eval_ac;
272
273         /* Setup a default return value of the lowest priority */
274         ret_ac = WMM_AC_BK;
275
276         /*
277          *  Find the highest AC that is enabled and does not require
278          *  admission control. The spec disallows downgrading to an AC,
279          *  which is enabled due to a completed admission control.
280          *  Unadmitted traffic is not to be sent on an AC with admitted
281          *  traffic.
282          */
283         for (down_ac = WMM_AC_BK; down_ac < eval_ac; down_ac++) {
284                 ac_status = &priv->wmm.ac_status[down_ac];
285
286                 if (!ac_status->disabled && !ac_status->flow_required)
287                         /* AC is enabled and does not require admission
288                            control */
289                         ret_ac = (enum mwifiex_wmm_ac_e) down_ac;
290         }
291
292         return ret_ac;
293 }
294
295 /*
296  * This function downgrades WMM priority queue.
297  */
298 void
299 mwifiex_wmm_setup_ac_downgrade(struct mwifiex_private *priv)
300 {
301         int ac_val;
302
303         dev_dbg(priv->adapter->dev, "info: WMM: AC Priorities:"
304                         "BK(0), BE(1), VI(2), VO(3)\n");
305
306         if (!priv->wmm_enabled) {
307                 /* WMM is not enabled, default priorities */
308                 for (ac_val = WMM_AC_BK; ac_val <= WMM_AC_VO; ac_val++)
309                         priv->wmm.ac_down_graded_vals[ac_val] =
310                                 (enum mwifiex_wmm_ac_e) ac_val;
311         } else {
312                 for (ac_val = WMM_AC_BK; ac_val <= WMM_AC_VO; ac_val++) {
313                         priv->wmm.ac_down_graded_vals[ac_val]
314                                 = mwifiex_wmm_eval_downgrade_ac(priv,
315                                                 (enum mwifiex_wmm_ac_e) ac_val);
316                         dev_dbg(priv->adapter->dev, "info: WMM: AC PRIO %d maps to %d\n",
317                                 ac_val, priv->wmm.ac_down_graded_vals[ac_val]);
318                 }
319         }
320 }
321
322 /*
323  * This function converts the IP TOS field to an WMM AC
324  * Queue assignment.
325  */
326 static enum mwifiex_wmm_ac_e
327 mwifiex_wmm_convert_tos_to_ac(struct mwifiex_adapter *adapter, u32 tos)
328 {
329         /* Map of TOS UP values to WMM AC */
330         const enum mwifiex_wmm_ac_e tos_to_ac[] = { WMM_AC_BE,
331                 WMM_AC_BK,
332                 WMM_AC_BK,
333                 WMM_AC_BE,
334                 WMM_AC_VI,
335                 WMM_AC_VI,
336                 WMM_AC_VO,
337                 WMM_AC_VO
338         };
339
340         if (tos >= ARRAY_SIZE(tos_to_ac))
341                 return WMM_AC_BE;
342
343         return tos_to_ac[tos];
344 }
345
346 /*
347  * This function evaluates a given TID and downgrades it to a lower
348  * TID if the WMM Parameter IE received from the AP indicates that the
349  * AP is disabled (due to call admission control (ACM bit). Mapping
350  * of TID to AC is taken care of internally.
351  */
352 static u8
353 mwifiex_wmm_downgrade_tid(struct mwifiex_private *priv, u32 tid)
354 {
355         enum mwifiex_wmm_ac_e ac, ac_down;
356         u8 new_tid;
357
358         ac = mwifiex_wmm_convert_tos_to_ac(priv->adapter, tid);
359         ac_down = priv->wmm.ac_down_graded_vals[ac];
360
361         /* Send the index to tid array, picking from the array will be
362          * taken care by dequeuing function
363          */
364         new_tid = ac_to_tid[ac_down][tid % 2];
365
366         return new_tid;
367 }
368
369 /*
370  * This function initializes the WMM state information and the
371  * WMM data path queues.
372  */
373 void
374 mwifiex_wmm_init(struct mwifiex_adapter *adapter)
375 {
376         int i, j;
377         struct mwifiex_private *priv;
378
379         for (j = 0; j < adapter->priv_num; ++j) {
380                 priv = adapter->priv[j];
381                 if (!priv)
382                         continue;
383
384                 for (i = 0; i < MAX_NUM_TID; ++i) {
385                         priv->aggr_prio_tbl[i].amsdu = tos_to_tid_inv[i];
386                         priv->aggr_prio_tbl[i].ampdu_ap = tos_to_tid_inv[i];
387                         priv->aggr_prio_tbl[i].ampdu_user = tos_to_tid_inv[i];
388                         priv->wmm.tid_tbl_ptr[i].ra_list_curr = NULL;
389                 }
390
391                 priv->aggr_prio_tbl[6].amsdu
392                         = priv->aggr_prio_tbl[6].ampdu_ap
393                         = priv->aggr_prio_tbl[6].ampdu_user
394                         = BA_STREAM_NOT_ALLOWED;
395
396                 priv->aggr_prio_tbl[7].amsdu = priv->aggr_prio_tbl[7].ampdu_ap
397                         = priv->aggr_prio_tbl[7].ampdu_user
398                         = BA_STREAM_NOT_ALLOWED;
399
400                 priv->add_ba_param.timeout = MWIFIEX_DEFAULT_BLOCK_ACK_TIMEOUT;
401                 priv->add_ba_param.tx_win_size = MWIFIEX_AMPDU_DEF_TXWINSIZE;
402                 priv->add_ba_param.rx_win_size = MWIFIEX_AMPDU_DEF_RXWINSIZE;
403         }
404 }
405
406 /*
407  * This function checks if WMM Tx queue is empty.
408  */
409 int
410 mwifiex_wmm_lists_empty(struct mwifiex_adapter *adapter)
411 {
412         int i, j;
413         struct mwifiex_private *priv;
414
415         for (j = 0; j < adapter->priv_num; ++j) {
416                 priv = adapter->priv[j];
417                 if (priv) {
418                         for (i = 0; i < MAX_NUM_TID; i++)
419                                 if (!mwifiex_wmm_is_ra_list_empty(adapter,
420                                              &priv->wmm.tid_tbl_ptr[i].ra_list))
421                                         return false;
422                 }
423         }
424
425         return true;
426 }
427
428 /*
429  * This function deletes all packets in an RA list node.
430  *
431  * The packet sent completion callback handler are called with
432  * status failure, after they are dequeued to ensure proper
433  * cleanup. The RA list node itself is freed at the end.
434  */
435 static void
436 mwifiex_wmm_del_pkts_in_ralist_node(struct mwifiex_private *priv,
437                                     struct mwifiex_ra_list_tbl *ra_list)
438 {
439         struct mwifiex_adapter *adapter = priv->adapter;
440         struct sk_buff *skb, *tmp;
441
442         skb_queue_walk_safe(&ra_list->skb_head, skb, tmp)
443                 mwifiex_write_data_complete(adapter, skb, -1);
444 }
445
446 /*
447  * This function deletes all packets in an RA list.
448  *
449  * Each nodes in the RA list are freed individually first, and then
450  * the RA list itself is freed.
451  */
452 static void
453 mwifiex_wmm_del_pkts_in_ralist(struct mwifiex_private *priv,
454                                struct list_head *ra_list_head)
455 {
456         struct mwifiex_ra_list_tbl *ra_list;
457
458         list_for_each_entry(ra_list, ra_list_head, list)
459                 mwifiex_wmm_del_pkts_in_ralist_node(priv, ra_list);
460 }
461
462 /*
463  * This function deletes all packets in all RA lists.
464  */
465 static void mwifiex_wmm_cleanup_queues(struct mwifiex_private *priv)
466 {
467         int i;
468
469         for (i = 0; i < MAX_NUM_TID; i++)
470                 mwifiex_wmm_del_pkts_in_ralist(priv, &priv->wmm.tid_tbl_ptr[i].
471                                                      ra_list);
472 }
473
474 /*
475  * This function deletes all route addresses from all RA lists.
476  */
477 static void mwifiex_wmm_delete_all_ralist(struct mwifiex_private *priv)
478 {
479         struct mwifiex_ra_list_tbl *ra_list, *tmp_node;
480         int i;
481
482         for (i = 0; i < MAX_NUM_TID; ++i) {
483                 dev_dbg(priv->adapter->dev,
484                                 "info: ra_list: freeing buf for tid %d\n", i);
485                 list_for_each_entry_safe(ra_list, tmp_node,
486                                 &priv->wmm.tid_tbl_ptr[i].ra_list, list) {
487                         list_del(&ra_list->list);
488                         kfree(ra_list);
489                 }
490
491                 INIT_LIST_HEAD(&priv->wmm.tid_tbl_ptr[i].ra_list);
492
493                 priv->wmm.tid_tbl_ptr[i].ra_list_curr = NULL;
494         }
495 }
496
497 /*
498  * This function cleans up the Tx and Rx queues.
499  *
500  * Cleanup includes -
501  *      - All packets in RA lists
502  *      - All entries in Rx reorder table
503  *      - All entries in Tx BA stream table
504  *      - MPA buffer (if required)
505  *      - All RA lists
506  */
507 void
508 mwifiex_clean_txrx(struct mwifiex_private *priv)
509 {
510         unsigned long flags;
511
512         mwifiex_11n_cleanup_reorder_tbl(priv);
513         spin_lock_irqsave(&priv->wmm.ra_list_spinlock, flags);
514
515         mwifiex_wmm_cleanup_queues(priv);
516         mwifiex_11n_delete_all_tx_ba_stream_tbl(priv);
517
518         if (priv->adapter->if_ops.cleanup_mpa_buf)
519                 priv->adapter->if_ops.cleanup_mpa_buf(priv->adapter);
520
521         mwifiex_wmm_delete_all_ralist(priv);
522         memcpy(tos_to_tid, ac_to_tid, sizeof(tos_to_tid));
523
524         spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, flags);
525 }
526
527 /*
528  * This function retrieves a particular RA list node, matching with the
529  * given TID and RA address.
530  */
531 static struct mwifiex_ra_list_tbl *
532 mwifiex_wmm_get_ralist_node(struct mwifiex_private *priv, u8 tid,
533                             u8 *ra_addr)
534 {
535         struct mwifiex_ra_list_tbl *ra_list;
536
537         list_for_each_entry(ra_list, &priv->wmm.tid_tbl_ptr[tid].ra_list,
538                             list) {
539                 if (!memcmp(ra_list->ra, ra_addr, ETH_ALEN))
540                         return ra_list;
541         }
542
543         return NULL;
544 }
545
546 /*
547  * This function retrieves an RA list node for a given TID and
548  * RA address pair.
549  *
550  * If no such node is found, a new node is added first and then
551  * retrieved.
552  */
553 static struct mwifiex_ra_list_tbl *
554 mwifiex_wmm_get_queue_raptr(struct mwifiex_private *priv, u8 tid, u8 *ra_addr)
555 {
556         struct mwifiex_ra_list_tbl *ra_list;
557
558         ra_list = mwifiex_wmm_get_ralist_node(priv, tid, ra_addr);
559         if (ra_list)
560                 return ra_list;
561         mwifiex_ralist_add(priv, ra_addr);
562
563         return mwifiex_wmm_get_ralist_node(priv, tid, ra_addr);
564 }
565
566 /*
567  * This function checks if a particular RA list node exists in a given TID
568  * table index.
569  */
570 int
571 mwifiex_is_ralist_valid(struct mwifiex_private *priv,
572                         struct mwifiex_ra_list_tbl *ra_list, int ptr_index)
573 {
574         struct mwifiex_ra_list_tbl *rlist;
575
576         list_for_each_entry(rlist, &priv->wmm.tid_tbl_ptr[ptr_index].ra_list,
577                             list) {
578                 if (rlist == ra_list)
579                         return true;
580         }
581
582         return false;
583 }
584
585 /*
586  * This function adds a packet to WMM queue.
587  *
588  * In disconnected state the packet is immediately dropped and the
589  * packet send completion callback is called with status failure.
590  *
591  * Otherwise, the correct RA list node is located and the packet
592  * is queued at the list tail.
593  */
594 void
595 mwifiex_wmm_add_buf_txqueue(struct mwifiex_adapter *adapter,
596                             struct sk_buff *skb)
597 {
598         struct mwifiex_txinfo *tx_info = MWIFIEX_SKB_TXCB(skb);
599         struct mwifiex_private *priv = adapter->priv[tx_info->bss_index];
600         u32 tid;
601         struct mwifiex_ra_list_tbl *ra_list;
602         u8 ra[ETH_ALEN], tid_down;
603         unsigned long flags;
604
605         if (!priv->media_connected) {
606                 dev_dbg(adapter->dev, "data: drop packet in disconnect\n");
607                 mwifiex_write_data_complete(adapter, skb, -1);
608                 return;
609         }
610
611         tid = skb->priority;
612
613         spin_lock_irqsave(&priv->wmm.ra_list_spinlock, flags);
614
615         tid_down = mwifiex_wmm_downgrade_tid(priv, tid);
616
617         /* In case of infra as we have already created the list during
618            association we just don't have to call get_queue_raptr, we will
619            have only 1 raptr for a tid in case of infra */
620         if (!mwifiex_queuing_ra_based(priv)) {
621                 if (!list_empty(&priv->wmm.tid_tbl_ptr[tid_down].ra_list))
622                         ra_list = list_first_entry(
623                                 &priv->wmm.tid_tbl_ptr[tid_down].ra_list,
624                                 struct mwifiex_ra_list_tbl, list);
625                 else
626                         ra_list = NULL;
627         } else {
628                 memcpy(ra, skb->data, ETH_ALEN);
629                 ra_list = mwifiex_wmm_get_queue_raptr(priv, tid_down, ra);
630         }
631
632         if (!ra_list) {
633                 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, flags);
634                 mwifiex_write_data_complete(adapter, skb, -1);
635                 return;
636         }
637
638         skb_queue_tail(&ra_list->skb_head, skb);
639
640         ra_list->total_pkts_size += skb->len;
641
642         spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, flags);
643 }
644
645 /*
646  * This function processes the get WMM status command response from firmware.
647  *
648  * The response may contain multiple TLVs -
649  *      - AC Queue status TLVs
650  *      - Current WMM Parameter IE TLV
651  *      - Admission Control action frame TLVs
652  *
653  * This function parses the TLVs and then calls further specific functions
654  * to process any changes in the queue prioritize or state.
655  */
656 int mwifiex_ret_wmm_get_status(struct mwifiex_private *priv,
657                                const struct host_cmd_ds_command *resp)
658 {
659         u8 *curr = (u8 *) &resp->params.get_wmm_status;
660         uint16_t resp_len = le16_to_cpu(resp->size), tlv_len;
661         int valid = true;
662
663         struct mwifiex_ie_types_data *tlv_hdr;
664         struct mwifiex_ie_types_wmm_queue_status *tlv_wmm_qstatus;
665         struct ieee_types_wmm_parameter *wmm_param_ie = NULL;
666         struct mwifiex_wmm_ac_status *ac_status;
667
668         dev_dbg(priv->adapter->dev, "info: WMM: WMM_GET_STATUS cmdresp received: %d\n",
669                         resp_len);
670
671         while ((resp_len >= sizeof(tlv_hdr->header)) && valid) {
672                 tlv_hdr = (struct mwifiex_ie_types_data *) curr;
673                 tlv_len = le16_to_cpu(tlv_hdr->header.len);
674
675                 switch (le16_to_cpu(tlv_hdr->header.type)) {
676                 case TLV_TYPE_WMMQSTATUS:
677                         tlv_wmm_qstatus =
678                                 (struct mwifiex_ie_types_wmm_queue_status *)
679                                 tlv_hdr;
680                         dev_dbg(priv->adapter->dev,
681                                 "info: CMD_RESP: WMM_GET_STATUS:"
682                                 " QSTATUS TLV: %d, %d, %d\n",
683                                tlv_wmm_qstatus->queue_index,
684                                tlv_wmm_qstatus->flow_required,
685                                tlv_wmm_qstatus->disabled);
686
687                         ac_status = &priv->wmm.ac_status[tlv_wmm_qstatus->
688                                                          queue_index];
689                         ac_status->disabled = tlv_wmm_qstatus->disabled;
690                         ac_status->flow_required =
691                                 tlv_wmm_qstatus->flow_required;
692                         ac_status->flow_created = tlv_wmm_qstatus->flow_created;
693                         break;
694
695                 case WLAN_EID_VENDOR_SPECIFIC:
696                         /*
697                          * Point the regular IEEE IE 2 bytes into the Marvell IE
698                          *   and setup the IEEE IE type and length byte fields
699                          */
700
701                         wmm_param_ie =
702                                 (struct ieee_types_wmm_parameter *) (curr +
703                                                                     2);
704                         wmm_param_ie->vend_hdr.len = (u8) tlv_len;
705                         wmm_param_ie->vend_hdr.element_id =
706                                                 WLAN_EID_VENDOR_SPECIFIC;
707
708                         dev_dbg(priv->adapter->dev,
709                                 "info: CMD_RESP: WMM_GET_STATUS:"
710                                 " WMM Parameter Set Count: %d\n",
711                                 wmm_param_ie->qos_info_bitmap &
712                                 IEEE80211_WMM_IE_AP_QOSINFO_PARAM_SET_CNT_MASK);
713
714                         memcpy((u8 *) &priv->curr_bss_params.bss_descriptor.
715                                wmm_ie, wmm_param_ie,
716                                wmm_param_ie->vend_hdr.len + 2);
717
718                         break;
719
720                 default:
721                         valid = false;
722                         break;
723                 }
724
725                 curr += (tlv_len + sizeof(tlv_hdr->header));
726                 resp_len -= (tlv_len + sizeof(tlv_hdr->header));
727         }
728
729         mwifiex_wmm_setup_queue_priorities(priv, wmm_param_ie);
730         mwifiex_wmm_setup_ac_downgrade(priv);
731
732         return 0;
733 }
734
735 /*
736  * Callback handler from the command module to allow insertion of a WMM TLV.
737  *
738  * If the BSS we are associating to supports WMM, this function adds the
739  * required WMM Information IE to the association request command buffer in
740  * the form of a Marvell extended IEEE IE.
741  */
742 u32
743 mwifiex_wmm_process_association_req(struct mwifiex_private *priv,
744                                     u8 **assoc_buf,
745                                     struct ieee_types_wmm_parameter *wmm_ie,
746                                     struct ieee80211_ht_cap *ht_cap)
747 {
748         struct mwifiex_ie_types_wmm_param_set *wmm_tlv;
749         u32 ret_len = 0;
750
751         /* Null checks */
752         if (!assoc_buf)
753                 return 0;
754         if (!(*assoc_buf))
755                 return 0;
756
757         if (!wmm_ie)
758                 return 0;
759
760         dev_dbg(priv->adapter->dev, "info: WMM: process assoc req:"
761                         "bss->wmmIe=0x%x\n",
762                         wmm_ie->vend_hdr.element_id);
763
764         if ((priv->wmm_required
765              || (ht_cap && (priv->adapter->config_bands & BAND_GN
766                      || priv->adapter->config_bands & BAND_AN))
767             )
768             && wmm_ie->vend_hdr.element_id == WLAN_EID_VENDOR_SPECIFIC) {
769                 wmm_tlv = (struct mwifiex_ie_types_wmm_param_set *) *assoc_buf;
770                 wmm_tlv->header.type = cpu_to_le16((u16) wmm_info_ie[0]);
771                 wmm_tlv->header.len = cpu_to_le16((u16) wmm_info_ie[1]);
772                 memcpy(wmm_tlv->wmm_ie, &wmm_info_ie[2],
773                         le16_to_cpu(wmm_tlv->header.len));
774                 if (wmm_ie->qos_info_bitmap & IEEE80211_WMM_IE_AP_QOSINFO_UAPSD)
775                         memcpy((u8 *) (wmm_tlv->wmm_ie
776                                         + le16_to_cpu(wmm_tlv->header.len)
777                                          - sizeof(priv->wmm_qosinfo)),
778                                         &priv->wmm_qosinfo,
779                                         sizeof(priv->wmm_qosinfo));
780
781                 ret_len = sizeof(wmm_tlv->header)
782                         + le16_to_cpu(wmm_tlv->header.len);
783
784                 *assoc_buf += ret_len;
785         }
786
787         return ret_len;
788 }
789
790 /*
791  * This function computes the time delay in the driver queues for a
792  * given packet.
793  *
794  * When the packet is received at the OS/Driver interface, the current
795  * time is set in the packet structure. The difference between the present
796  * time and that received time is computed in this function and limited
797  * based on pre-compiled limits in the driver.
798  */
799 u8
800 mwifiex_wmm_compute_drv_pkt_delay(struct mwifiex_private *priv,
801                                         const struct sk_buff *skb)
802 {
803         u8 ret_val = 0;
804         struct timeval out_tstamp, in_tstamp;
805         u32 queue_delay;
806
807         do_gettimeofday(&out_tstamp);
808         in_tstamp = ktime_to_timeval(skb->tstamp);
809
810         queue_delay = (out_tstamp.tv_sec - in_tstamp.tv_sec) * 1000;
811         queue_delay += (out_tstamp.tv_usec - in_tstamp.tv_usec) / 1000;
812
813         /*
814          * Queue delay is passed as a uint8 in units of 2ms (ms shifted
815          *  by 1). Min value (other than 0) is therefore 2ms, max is 510ms.
816          *
817          * Pass max value if queue_delay is beyond the uint8 range
818          */
819         ret_val = (u8) (min(queue_delay, priv->wmm.drv_pkt_delay_max) >> 1);
820
821         dev_dbg(priv->adapter->dev, "data: WMM: Pkt Delay: %d ms,"
822                                 " %d ms sent to FW\n", queue_delay, ret_val);
823
824         return ret_val;
825 }
826
827 /*
828  * This function retrieves the highest priority RA list table pointer.
829  */
830 static struct mwifiex_ra_list_tbl *
831 mwifiex_wmm_get_highest_priolist_ptr(struct mwifiex_adapter *adapter,
832                                      struct mwifiex_private **priv, int *tid)
833 {
834         struct mwifiex_private *priv_tmp;
835         struct mwifiex_ra_list_tbl *ptr, *head;
836         struct mwifiex_bss_prio_node *bssprio_node, *bssprio_head;
837         struct mwifiex_tid_tbl *tid_ptr;
838         int is_list_empty;
839         unsigned long flags;
840         int i, j;
841
842         for (j = adapter->priv_num - 1; j >= 0; --j) {
843                 spin_lock_irqsave(&adapter->bss_prio_tbl[j].bss_prio_lock,
844                                 flags);
845                 is_list_empty = list_empty(&adapter->bss_prio_tbl[j]
846                                 .bss_prio_head);
847                 spin_unlock_irqrestore(&adapter->bss_prio_tbl[j].bss_prio_lock,
848                                 flags);
849                 if (is_list_empty)
850                         continue;
851
852                 if (adapter->bss_prio_tbl[j].bss_prio_cur ==
853                     (struct mwifiex_bss_prio_node *)
854                     &adapter->bss_prio_tbl[j].bss_prio_head) {
855                         bssprio_node =
856                                 list_first_entry(&adapter->bss_prio_tbl[j]
857                                                  .bss_prio_head,
858                                                  struct mwifiex_bss_prio_node,
859                                                  list);
860                         bssprio_head = bssprio_node;
861                 } else {
862                         bssprio_node = adapter->bss_prio_tbl[j].bss_prio_cur;
863                         bssprio_head = bssprio_node;
864                 }
865
866                 do {
867                         priv_tmp = bssprio_node->priv;
868
869                         for (i = HIGH_PRIO_TID; i >= LOW_PRIO_TID; --i) {
870
871                                 tid_ptr = &(priv_tmp)->wmm.
872                                         tid_tbl_ptr[tos_to_tid[i]];
873
874                                 spin_lock_irqsave(&tid_ptr->tid_tbl_lock,
875                                                   flags);
876                                 is_list_empty =
877                                         list_empty(&adapter->bss_prio_tbl[j]
878                                                    .bss_prio_head);
879                                 spin_unlock_irqrestore(&tid_ptr->tid_tbl_lock,
880                                                        flags);
881                                 if (is_list_empty)
882                                         continue;
883
884                                 /*
885                                  * Always choose the next ra we transmitted
886                                  * last time, this way we pick the ra's in
887                                  * round robin fashion.
888                                  */
889                                 ptr = list_first_entry(
890                                                 &tid_ptr->ra_list_curr->list,
891                                                 struct mwifiex_ra_list_tbl,
892                                                 list);
893
894                                 head = ptr;
895                                 if (ptr == (struct mwifiex_ra_list_tbl *)
896                                                 &tid_ptr->ra_list) {
897                                         /* Get next ra */
898                                         ptr = list_first_entry(&ptr->list,
899                                             struct mwifiex_ra_list_tbl, list);
900                                         head = ptr;
901                                 }
902
903                                 do {
904                                         is_list_empty =
905                                                 skb_queue_empty(&ptr->skb_head);
906                                         if (!is_list_empty) {
907                                                 *priv = priv_tmp;
908                                                 *tid = tos_to_tid[i];
909                                                 return ptr;
910                                         }
911                                         /* Get next ra */
912                                         ptr = list_first_entry(&ptr->list,
913                                                  struct mwifiex_ra_list_tbl,
914                                                  list);
915                                         if (ptr ==
916                                             (struct mwifiex_ra_list_tbl *)
917                                             &tid_ptr->ra_list)
918                                                 ptr = list_first_entry(
919                                                     &ptr->list,
920                                                     struct mwifiex_ra_list_tbl,
921                                                     list);
922                                 } while (ptr != head);
923                         }
924
925                         /* Get next bss priority node */
926                         bssprio_node = list_first_entry(&bssprio_node->list,
927                                                 struct mwifiex_bss_prio_node,
928                                                 list);
929
930                         if (bssprio_node ==
931                             (struct mwifiex_bss_prio_node *)
932                             &adapter->bss_prio_tbl[j].bss_prio_head)
933                                 /* Get next bss priority node */
934                                 bssprio_node = list_first_entry(
935                                                 &bssprio_node->list,
936                                                 struct mwifiex_bss_prio_node,
937                                                 list);
938                 } while (bssprio_node != bssprio_head);
939         }
940         return NULL;
941 }
942
943 /*
944  * This function gets the number of packets in the Tx queue of a
945  * particular RA list.
946  */
947 static int
948 mwifiex_num_pkts_in_txq(struct mwifiex_private *priv,
949                         struct mwifiex_ra_list_tbl *ptr, int max_buf_size)
950 {
951         int count = 0, total_size = 0;
952         struct sk_buff *skb, *tmp;
953
954         skb_queue_walk_safe(&ptr->skb_head, skb, tmp) {
955                 total_size += skb->len;
956                 if (total_size < max_buf_size)
957                         ++count;
958                 else
959                         break;
960         }
961
962         return count;
963 }
964
965 /*
966  * This function sends a single packet to firmware for transmission.
967  */
968 static void
969 mwifiex_send_single_packet(struct mwifiex_private *priv,
970                            struct mwifiex_ra_list_tbl *ptr, int ptr_index,
971                            unsigned long ra_list_flags)
972                            __releases(&priv->wmm.ra_list_spinlock)
973 {
974         struct sk_buff *skb, *skb_next;
975         struct mwifiex_tx_param tx_param;
976         struct mwifiex_adapter *adapter = priv->adapter;
977         int status = 0;
978         struct mwifiex_txinfo *tx_info;
979
980         if (skb_queue_empty(&ptr->skb_head)) {
981                 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
982                                        ra_list_flags);
983                 dev_dbg(adapter->dev, "data: nothing to send\n");
984                 return;
985         }
986
987         skb = skb_dequeue(&ptr->skb_head);
988
989         tx_info = MWIFIEX_SKB_TXCB(skb);
990         dev_dbg(adapter->dev, "data: dequeuing the packet %p %p\n", ptr, skb);
991
992         ptr->total_pkts_size -= skb->len;
993
994         if (!skb_queue_empty(&ptr->skb_head))
995                 skb_next = skb_peek(&ptr->skb_head);
996         else
997                 skb_next = NULL;
998
999         spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, ra_list_flags);
1000
1001         tx_param.next_pkt_len = ((skb_next) ? skb_next->len +
1002                                 sizeof(struct txpd) : 0);
1003
1004         status = mwifiex_process_tx(priv, skb, &tx_param);
1005
1006         if (status == -EBUSY) {
1007                 /* Queue the packet back at the head */
1008                 spin_lock_irqsave(&priv->wmm.ra_list_spinlock, ra_list_flags);
1009
1010                 if (!mwifiex_is_ralist_valid(priv, ptr, ptr_index)) {
1011                         spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
1012                                                ra_list_flags);
1013                         mwifiex_write_data_complete(adapter, skb, -1);
1014                         return;
1015                 }
1016
1017                 skb_queue_tail(&ptr->skb_head, skb);
1018
1019                 ptr->total_pkts_size += skb->len;
1020                 tx_info->flags |= MWIFIEX_BUF_FLAG_REQUEUED_PKT;
1021                 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
1022                                        ra_list_flags);
1023         } else {
1024                 spin_lock_irqsave(&priv->wmm.ra_list_spinlock, ra_list_flags);
1025                 if (mwifiex_is_ralist_valid(priv, ptr, ptr_index)) {
1026                         priv->wmm.packets_out[ptr_index]++;
1027                         priv->wmm.tid_tbl_ptr[ptr_index].ra_list_curr = ptr;
1028                 }
1029                 adapter->bss_prio_tbl[priv->bss_priority].bss_prio_cur =
1030                         list_first_entry(
1031                                 &adapter->bss_prio_tbl[priv->bss_priority]
1032                                 .bss_prio_cur->list,
1033                                 struct mwifiex_bss_prio_node,
1034                                 list);
1035                 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
1036                                        ra_list_flags);
1037         }
1038 }
1039
1040 /*
1041  * This function checks if the first packet in the given RA list
1042  * is already processed or not.
1043  */
1044 static int
1045 mwifiex_is_ptr_processed(struct mwifiex_private *priv,
1046                          struct mwifiex_ra_list_tbl *ptr)
1047 {
1048         struct sk_buff *skb;
1049         struct mwifiex_txinfo *tx_info;
1050
1051         if (skb_queue_empty(&ptr->skb_head))
1052                 return false;
1053
1054         skb = skb_peek(&ptr->skb_head);
1055
1056         tx_info = MWIFIEX_SKB_TXCB(skb);
1057         if (tx_info->flags & MWIFIEX_BUF_FLAG_REQUEUED_PKT)
1058                 return true;
1059
1060         return false;
1061 }
1062
1063 /*
1064  * This function sends a single processed packet to firmware for
1065  * transmission.
1066  */
1067 static void
1068 mwifiex_send_processed_packet(struct mwifiex_private *priv,
1069                               struct mwifiex_ra_list_tbl *ptr, int ptr_index,
1070                               unsigned long ra_list_flags)
1071                                 __releases(&priv->wmm.ra_list_spinlock)
1072 {
1073         struct mwifiex_tx_param tx_param;
1074         struct mwifiex_adapter *adapter = priv->adapter;
1075         int ret = -1;
1076         struct sk_buff *skb, *skb_next;
1077         struct mwifiex_txinfo *tx_info;
1078
1079         if (skb_queue_empty(&ptr->skb_head)) {
1080                 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
1081                                        ra_list_flags);
1082                 return;
1083         }
1084
1085         skb = skb_dequeue(&ptr->skb_head);
1086
1087         if (!skb_queue_empty(&ptr->skb_head))
1088                 skb_next = skb_peek(&ptr->skb_head);
1089         else
1090                 skb_next = NULL;
1091
1092         tx_info = MWIFIEX_SKB_TXCB(skb);
1093
1094         spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, ra_list_flags);
1095         tx_param.next_pkt_len =
1096                 ((skb_next) ? skb_next->len +
1097                  sizeof(struct txpd) : 0);
1098         ret = adapter->if_ops.host_to_card(adapter, MWIFIEX_TYPE_DATA,
1099                                            skb->data, skb->len, &tx_param);
1100         switch (ret) {
1101         case -EBUSY:
1102                 dev_dbg(adapter->dev, "data: -EBUSY is returned\n");
1103                 spin_lock_irqsave(&priv->wmm.ra_list_spinlock, ra_list_flags);
1104
1105                 if (!mwifiex_is_ralist_valid(priv, ptr, ptr_index)) {
1106                         spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
1107                                                ra_list_flags);
1108                         mwifiex_write_data_complete(adapter, skb, -1);
1109                         return;
1110                 }
1111
1112                 skb_queue_tail(&ptr->skb_head, skb);
1113
1114                 tx_info->flags |= MWIFIEX_BUF_FLAG_REQUEUED_PKT;
1115                 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
1116                                        ra_list_flags);
1117                 break;
1118         case -1:
1119                 adapter->data_sent = false;
1120                 dev_err(adapter->dev, "host_to_card failed: %#x\n", ret);
1121                 adapter->dbg.num_tx_host_to_card_failure++;
1122                 mwifiex_write_data_complete(adapter, skb, ret);
1123                 break;
1124         case -EINPROGRESS:
1125                 adapter->data_sent = false;
1126         default:
1127                 break;
1128         }
1129         if (ret != -EBUSY) {
1130                 spin_lock_irqsave(&priv->wmm.ra_list_spinlock, ra_list_flags);
1131                 if (mwifiex_is_ralist_valid(priv, ptr, ptr_index)) {
1132                         priv->wmm.packets_out[ptr_index]++;
1133                         priv->wmm.tid_tbl_ptr[ptr_index].ra_list_curr = ptr;
1134                 }
1135                 adapter->bss_prio_tbl[priv->bss_priority].bss_prio_cur =
1136                         list_first_entry(
1137                                 &adapter->bss_prio_tbl[priv->bss_priority]
1138                                 .bss_prio_cur->list,
1139                                 struct mwifiex_bss_prio_node,
1140                                 list);
1141                 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock,
1142                                        ra_list_flags);
1143         }
1144 }
1145
1146 /*
1147  * This function dequeues a packet from the highest priority list
1148  * and transmits it.
1149  */
1150 static int
1151 mwifiex_dequeue_tx_packet(struct mwifiex_adapter *adapter)
1152 {
1153         struct mwifiex_ra_list_tbl *ptr;
1154         struct mwifiex_private *priv = NULL;
1155         int ptr_index = 0;
1156         u8 ra[ETH_ALEN];
1157         int tid_del = 0, tid = 0;
1158         unsigned long flags;
1159
1160         ptr = mwifiex_wmm_get_highest_priolist_ptr(adapter, &priv, &ptr_index);
1161         if (!ptr)
1162                 return -1;
1163
1164         tid = mwifiex_get_tid(priv->adapter, ptr);
1165
1166         dev_dbg(adapter->dev, "data: tid=%d\n", tid);
1167
1168         spin_lock_irqsave(&priv->wmm.ra_list_spinlock, flags);
1169         if (!mwifiex_is_ralist_valid(priv, ptr, ptr_index)) {
1170                 spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, flags);
1171                 return -1;
1172         }
1173
1174         if (mwifiex_is_ptr_processed(priv, ptr)) {
1175                 mwifiex_send_processed_packet(priv, ptr, ptr_index, flags);
1176                 /* ra_list_spinlock has been freed in
1177                    mwifiex_send_processed_packet() */
1178                 return 0;
1179         }
1180
1181         if (!ptr->is_11n_enabled || mwifiex_is_ba_stream_setup(priv, ptr, tid)
1182             || ((priv->sec_info.wpa_enabled
1183                   || priv->sec_info.wpa2_enabled) && !priv->wpa_is_gtk_set)
1184                 ) {
1185                 mwifiex_send_single_packet(priv, ptr, ptr_index, flags);
1186                 /* ra_list_spinlock has been freed in
1187                    mwifiex_send_single_packet() */
1188         } else {
1189                 if (mwifiex_is_ampdu_allowed(priv, ptr, tid)) {
1190                         if (mwifiex_is_ba_stream_avail(priv)) {
1191                                 mwifiex_11n_create_tx_ba_stream_tbl(priv,
1192                                                 ptr->ra, tid,
1193                                                 BA_STREAM_SETUP_INPROGRESS);
1194                                 mwifiex_send_addba(priv, tid, ptr->ra);
1195                         } else if (mwifiex_find_stream_to_delete
1196                                    (priv, ptr, tid, &tid_del, ra)) {
1197                                 mwifiex_11n_create_tx_ba_stream_tbl(priv,
1198                                                 ptr->ra, tid,
1199                                                 BA_STREAM_SETUP_INPROGRESS);
1200                                 mwifiex_send_delba(priv, tid_del, ra, 1);
1201                         }
1202                 }
1203 /* Minimum number of AMSDU */
1204 #define MIN_NUM_AMSDU 2
1205                 if (mwifiex_is_amsdu_allowed(priv, ptr, tid) &&
1206                     (mwifiex_num_pkts_in_txq(priv, ptr, adapter->tx_buf_size) >=
1207                      MIN_NUM_AMSDU))
1208                         mwifiex_11n_aggregate_pkt(priv, ptr, INTF_HEADER_LEN,
1209                                                   ptr_index, flags);
1210                         /* ra_list_spinlock has been freed in
1211                            mwifiex_11n_aggregate_pkt() */
1212                 else
1213                         mwifiex_send_single_packet(priv, ptr, ptr_index, flags);
1214                         /* ra_list_spinlock has been freed in
1215                            mwifiex_send_single_packet() */
1216         }
1217         return 0;
1218 }
1219
1220 /*
1221  * This function transmits the highest priority packet awaiting in the
1222  * WMM Queues.
1223  */
1224 void
1225 mwifiex_wmm_process_tx(struct mwifiex_adapter *adapter)
1226 {
1227         do {
1228                 /* Check if busy */
1229                 if (adapter->data_sent || adapter->tx_lock_flag)
1230                         break;
1231
1232                 if (mwifiex_dequeue_tx_packet(adapter))
1233                         break;
1234         } while (true);
1235
1236         return;
1237 }