1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * NXP Wireless LAN device driver: WMM
4 *
5 * Copyright 2011-2020 NXP
6 */
7
8 #include "decl.h"
9 #include "ioctl.h"
10 #include "util.h"
11 #include "fw.h"
12 #include "main.h"
13 #include "wmm.h"
14 #include "11n.h"
15
16
17 /* Maximum value FW can accept for driver delay in packet transmission */
18 #define DRV_PKT_DELAY_TO_FW_MAX 512
19
20
21 #define WMM_QUEUED_PACKET_LOWER_LIMIT 180
22
23 #define WMM_QUEUED_PACKET_UPPER_LIMIT 200
24
25 /* Offset for TOS field in the IP header */
26 #define IPTOS_OFFSET 5
27
28 static bool disable_tx_amsdu;
29 module_param(disable_tx_amsdu, bool, 0644);
30
31 /* This table inverses the tos_to_tid operation to get a priority
32 * which is in sequential order, and can be compared.
33 * Use this to compare the priority of two different TIDs.
34 */
35 const u8 tos_to_tid_inv[] = {
36 0x02, /* from tos_to_tid[2] = 0 */
37 0x00, /* from tos_to_tid[0] = 1 */
38 0x01, /* from tos_to_tid[1] = 2 */
39 0x03,
40 0x04,
41 0x05,
42 0x06,
43 0x07
44 };
45
46 /* WMM information IE */
47 static const u8 wmm_info_ie[] = { WLAN_EID_VENDOR_SPECIFIC, 0x07,
48 0x00, 0x50, 0xf2, 0x02,
49 0x00, 0x01, 0x00
50 };
51
52 static const u8 wmm_aci_to_qidx_map[] = { WMM_AC_BE,
53 WMM_AC_BK,
54 WMM_AC_VI,
55 WMM_AC_VO
56 };
57
58 static u8 tos_to_tid[] = {
59 /* TID DSCP_P2 DSCP_P1 DSCP_P0 WMM_AC */
60 0x01, /* 0 1 0 AC_BK */
61 0x02, /* 0 0 0 AC_BK */
62 0x00, /* 0 0 1 AC_BE */
63 0x03, /* 0 1 1 AC_BE */
64 0x04, /* 1 0 0 AC_VI */
65 0x05, /* 1 0 1 AC_VI */
66 0x06, /* 1 1 0 AC_VO */
67 0x07 /* 1 1 1 AC_VO */
68 };
69
70 static u8 ac_to_tid[4][2] = { {1, 2}, {0, 3}, {4, 5}, {6, 7} };
71
72 /*
73 * This function debug prints the priority parameters for a WMM AC.
74 */
75 static void
mwifiex_wmm_ac_debug_print(const struct ieee_types_wmm_ac_parameters * ac_param)76 mwifiex_wmm_ac_debug_print(const struct ieee_types_wmm_ac_parameters *ac_param)
77 {
78 const char *ac_str[] = { "BK", "BE", "VI", "VO" };
79
80 pr_debug("info: WMM AC_%s: ACI=%d, ACM=%d, Aifsn=%d, "
81 "EcwMin=%d, EcwMax=%d, TxopLimit=%d\n",
82 ac_str[wmm_aci_to_qidx_map[(ac_param->aci_aifsn_bitmap
83 & MWIFIEX_ACI) >> 5]],
84 (ac_param->aci_aifsn_bitmap & MWIFIEX_ACI) >> 5,
85 (ac_param->aci_aifsn_bitmap & MWIFIEX_ACM) >> 4,
86 ac_param->aci_aifsn_bitmap & MWIFIEX_AIFSN,
87 ac_param->ecw_bitmap & MWIFIEX_ECW_MIN,
88 (ac_param->ecw_bitmap & MWIFIEX_ECW_MAX) >> 4,
89 le16_to_cpu(ac_param->tx_op_limit));
90 }
91
92 /*
93 * This function allocates a route address list.
94 *
95 * The function also initializes the list with the provided RA.
96 */
97 static struct mwifiex_ra_list_tbl *
mwifiex_wmm_allocate_ralist_node(struct mwifiex_adapter * adapter,const u8 * ra)98 mwifiex_wmm_allocate_ralist_node(struct mwifiex_adapter *adapter, const u8 *ra)
99 {
100 struct mwifiex_ra_list_tbl *ra_list;
101
102 ra_list = kzalloc(sizeof(struct mwifiex_ra_list_tbl), GFP_ATOMIC);
103 if (!ra_list)
104 return NULL;
105
106 INIT_LIST_HEAD(&ra_list->list);
107 skb_queue_head_init(&ra_list->skb_head);
108
109 memcpy(ra_list->ra, ra, ETH_ALEN);
110
111 ra_list->total_pkt_count = 0;
112
113 mwifiex_dbg(adapter, INFO, "info: allocated ra_list %p\n", ra_list);
114
115 return ra_list;
116 }
117
118 /* This function returns random no between 16 and 32 to be used as threshold
119 * for no of packets after which BA setup is initiated.
120 */
mwifiex_get_random_ba_threshold(void)121 static u8 mwifiex_get_random_ba_threshold(void)
122 {
123 u64 ns;
124 /* setup ba_packet_threshold here random number between
125 * [BA_SETUP_PACKET_OFFSET,
126 * BA_SETUP_PACKET_OFFSET+BA_SETUP_MAX_PACKET_THRESHOLD-1]
127 */
128 ns = ktime_get_ns();
129 ns += (ns >> 32) + (ns >> 16);
130
131 return ((u8)ns % BA_SETUP_MAX_PACKET_THRESHOLD) + BA_SETUP_PACKET_OFFSET;
132 }
133
134 /*
135 * This function allocates and adds a RA list for all TIDs
136 * with the given RA.
137 */
mwifiex_ralist_add(struct mwifiex_private * priv,const u8 * ra)138 void mwifiex_ralist_add(struct mwifiex_private *priv, const u8 *ra)
139 {
140 int i;
141 struct mwifiex_ra_list_tbl *ra_list;
142 struct mwifiex_adapter *adapter = priv->adapter;
143 struct mwifiex_sta_node *node;
144
145
146 for (i = 0; i < MAX_NUM_TID; ++i) {
147 ra_list = mwifiex_wmm_allocate_ralist_node(adapter, ra);
148 mwifiex_dbg(adapter, INFO,
149 "info: created ra_list %p\n", ra_list);
150
151 if (!ra_list)
152 break;
153
154 ra_list->is_11n_enabled = 0;
155 ra_list->tdls_link = false;
156 ra_list->ba_status = BA_SETUP_NONE;
157 ra_list->amsdu_in_ampdu = false;
158 if (!mwifiex_queuing_ra_based(priv)) {
159 if (mwifiex_is_tdls_link_setup
160 (mwifiex_get_tdls_link_status(priv, ra))) {
161 ra_list->tdls_link = true;
162 ra_list->is_11n_enabled =
163 mwifiex_tdls_peer_11n_enabled(priv, ra);
164 } else {
165 ra_list->is_11n_enabled = IS_11N_ENABLED(priv);
166 }
167 } else {
168 spin_lock_bh(&priv->sta_list_spinlock);
169 node = mwifiex_get_sta_entry(priv, ra);
170 if (node)
171 ra_list->tx_paused = node->tx_pause;
172 ra_list->is_11n_enabled =
173 mwifiex_is_sta_11n_enabled(priv, node);
174 if (ra_list->is_11n_enabled)
175 ra_list->max_amsdu = node->max_amsdu;
176 spin_unlock_bh(&priv->sta_list_spinlock);
177 }
178
179 mwifiex_dbg(adapter, DATA, "data: ralist %p: is_11n_enabled=%d\n",
180 ra_list, ra_list->is_11n_enabled);
181
182 if (ra_list->is_11n_enabled) {
183 ra_list->ba_pkt_count = 0;
184 ra_list->ba_packet_thr =
185 mwifiex_get_random_ba_threshold();
186 }
187 list_add_tail(&ra_list->list,
188 &priv->wmm.tid_tbl_ptr[i].ra_list);
189 }
190 }
191
192 /*
193 * This function sets the WMM queue priorities to their default values.
194 */
mwifiex_wmm_default_queue_priorities(struct mwifiex_private * priv)195 static void mwifiex_wmm_default_queue_priorities(struct mwifiex_private *priv)
196 {
197 /* Default queue priorities: VO->VI->BE->BK */
198 priv->wmm.queue_priority[0] = WMM_AC_VO;
199 priv->wmm.queue_priority[1] = WMM_AC_VI;
200 priv->wmm.queue_priority[2] = WMM_AC_BE;
201 priv->wmm.queue_priority[3] = WMM_AC_BK;
202 }
203
204 /*
205 * This function map ACs to TIDs.
206 */
207 static void
mwifiex_wmm_queue_priorities_tid(struct mwifiex_private * priv)208 mwifiex_wmm_queue_priorities_tid(struct mwifiex_private *priv)
209 {
210 struct mwifiex_wmm_desc *wmm = &priv->wmm;
211 u8 *queue_priority = wmm->queue_priority;
212 int i;
213
214 for (i = 0; i < 4; ++i) {
215 tos_to_tid[7 - (i * 2)] = ac_to_tid[queue_priority[i]][1];
216 tos_to_tid[6 - (i * 2)] = ac_to_tid[queue_priority[i]][0];
217 }
218
219 for (i = 0; i < MAX_NUM_TID; ++i)
220 priv->tos_to_tid_inv[tos_to_tid[i]] = (u8)i;
221
222 atomic_set(&wmm->highest_queued_prio, HIGH_PRIO_TID);
223 }
224
225 /*
226 * This function initializes WMM priority queues.
227 */
228 void
mwifiex_wmm_setup_queue_priorities(struct mwifiex_private * priv,struct ieee_types_wmm_parameter * wmm_ie)229 mwifiex_wmm_setup_queue_priorities(struct mwifiex_private *priv,
230 struct ieee_types_wmm_parameter *wmm_ie)
231 {
232 u16 cw_min, avg_back_off, tmp[4];
233 u32 i, j, num_ac;
234 u8 ac_idx;
235
236 if (!wmm_ie || !priv->wmm_enabled) {
237 /* WMM is not enabled, just set the defaults and return */
238 mwifiex_wmm_default_queue_priorities(priv);
239 return;
240 }
241
242 mwifiex_dbg(priv->adapter, INFO,
243 "info: WMM Parameter IE: version=%d,\t"
244 "qos_info Parameter Set Count=%d, Reserved=%#x\n",
245 wmm_ie->version, wmm_ie->qos_info_bitmap &
246 IEEE80211_WMM_IE_AP_QOSINFO_PARAM_SET_CNT_MASK,
247 wmm_ie->reserved);
248
249 for (num_ac = 0; num_ac < ARRAY_SIZE(wmm_ie->ac_params); num_ac++) {
250 u8 ecw = wmm_ie->ac_params[num_ac].ecw_bitmap;
251 u8 aci_aifsn = wmm_ie->ac_params[num_ac].aci_aifsn_bitmap;
252 cw_min = (1 << (ecw & MWIFIEX_ECW_MIN)) - 1;
253 avg_back_off = (cw_min >> 1) + (aci_aifsn & MWIFIEX_AIFSN);
254
255 ac_idx = wmm_aci_to_qidx_map[(aci_aifsn & MWIFIEX_ACI) >> 5];
256 priv->wmm.queue_priority[ac_idx] = ac_idx;
257 tmp[ac_idx] = avg_back_off;
258
259 mwifiex_dbg(priv->adapter, INFO,
260 "info: WMM: CWmax=%d CWmin=%d Avg Back-off=%d\n",
261 (1 << ((ecw & MWIFIEX_ECW_MAX) >> 4)) - 1,
262 cw_min, avg_back_off);
263 mwifiex_wmm_ac_debug_print(&wmm_ie->ac_params[num_ac]);
264 }
265
266 /* Bubble sort */
267 for (i = 0; i < num_ac; i++) {
268 for (j = 1; j < num_ac - i; j++) {
269 if (tmp[j - 1] > tmp[j]) {
270 swap(tmp[j - 1], tmp[j]);
271 swap(priv->wmm.queue_priority[j - 1],
272 priv->wmm.queue_priority[j]);
273 } else if (tmp[j - 1] == tmp[j]) {
274 if (priv->wmm.queue_priority[j - 1]
275 < priv->wmm.queue_priority[j])
276 swap(priv->wmm.queue_priority[j - 1],
277 priv->wmm.queue_priority[j]);
278 }
279 }
280 }
281
282 mwifiex_wmm_queue_priorities_tid(priv);
283 }
284
285 /*
286 * This function evaluates whether or not an AC is to be downgraded.
287 *
288 * In case the AC is not enabled, the highest AC is returned that is
289 * enabled and does not require admission control.
290 */
291 static enum mwifiex_wmm_ac_e
mwifiex_wmm_eval_downgrade_ac(struct mwifiex_private * priv,enum mwifiex_wmm_ac_e eval_ac)292 mwifiex_wmm_eval_downgrade_ac(struct mwifiex_private *priv,
293 enum mwifiex_wmm_ac_e eval_ac)
294 {
295 int down_ac;
296 enum mwifiex_wmm_ac_e ret_ac;
297 struct mwifiex_wmm_ac_status *ac_status;
298
299 ac_status = &priv->wmm.ac_status[eval_ac];
300
301 if (!ac_status->disabled)
302 /* Okay to use this AC, its enabled */
303 return eval_ac;
304
305 /* Setup a default return value of the lowest priority */
306 ret_ac = WMM_AC_BK;
307
308 /*
309 * Find the highest AC that is enabled and does not require
310 * admission control. The spec disallows downgrading to an AC,
311 * which is enabled due to a completed admission control.
312 * Unadmitted traffic is not to be sent on an AC with admitted
313 * traffic.
314 */
315 for (down_ac = WMM_AC_BK; down_ac < eval_ac; down_ac++) {
316 ac_status = &priv->wmm.ac_status[down_ac];
317
318 if (!ac_status->disabled && !ac_status->flow_required)
319 /* AC is enabled and does not require admission
320 control */
321 ret_ac = (enum mwifiex_wmm_ac_e) down_ac;
322 }
323
324 return ret_ac;
325 }
326
327 /*
328 * This function downgrades WMM priority queue.
329 */
330 void
mwifiex_wmm_setup_ac_downgrade(struct mwifiex_private * priv)331 mwifiex_wmm_setup_ac_downgrade(struct mwifiex_private *priv)
332 {
333 int ac_val;
334
335 mwifiex_dbg(priv->adapter, INFO, "info: WMM: AC Priorities:\t"
336 "BK(0), BE(1), VI(2), VO(3)\n");
337
338 if (!priv->wmm_enabled) {
339 /* WMM is not enabled, default priorities */
340 for (ac_val = WMM_AC_BK; ac_val <= WMM_AC_VO; ac_val++)
341 priv->wmm.ac_down_graded_vals[ac_val] =
342 (enum mwifiex_wmm_ac_e) ac_val;
343 } else {
344 for (ac_val = WMM_AC_BK; ac_val <= WMM_AC_VO; ac_val++) {
345 priv->wmm.ac_down_graded_vals[ac_val]
346 = mwifiex_wmm_eval_downgrade_ac(priv,
347 (enum mwifiex_wmm_ac_e) ac_val);
348 mwifiex_dbg(priv->adapter, INFO,
349 "info: WMM: AC PRIO %d maps to %d\n",
350 ac_val,
351 priv->wmm.ac_down_graded_vals[ac_val]);
352 }
353 }
354 }
355
356 /*
357 * This function converts the IP TOS field to an WMM AC
358 * Queue assignment.
359 */
360 static enum mwifiex_wmm_ac_e
mwifiex_wmm_convert_tos_to_ac(struct mwifiex_adapter * adapter,u32 tos)361 mwifiex_wmm_convert_tos_to_ac(struct mwifiex_adapter *adapter, u32 tos)
362 {
363 /* Map of TOS UP values to WMM AC */
364 static const enum mwifiex_wmm_ac_e tos_to_ac[] = {
365 WMM_AC_BE,
366 WMM_AC_BK,
367 WMM_AC_BK,
368 WMM_AC_BE,
369 WMM_AC_VI,
370 WMM_AC_VI,
371 WMM_AC_VO,
372 WMM_AC_VO
373 };
374
375 if (tos >= ARRAY_SIZE(tos_to_ac))
376 return WMM_AC_BE;
377
378 return tos_to_ac[tos];
379 }
380
381 /*
382 * This function evaluates a given TID and downgrades it to a lower
383 * TID if the WMM Parameter IE received from the AP indicates that the
384 * AP is disabled (due to call admission control (ACM bit). Mapping
385 * of TID to AC is taken care of internally.
386 */
mwifiex_wmm_downgrade_tid(struct mwifiex_private * priv,u32 tid)387 u8 mwifiex_wmm_downgrade_tid(struct mwifiex_private *priv, u32 tid)
388 {
389 enum mwifiex_wmm_ac_e ac, ac_down;
390 u8 new_tid;
391
392 ac = mwifiex_wmm_convert_tos_to_ac(priv->adapter, tid);
393 ac_down = priv->wmm.ac_down_graded_vals[ac];
394
395 /* Send the index to tid array, picking from the array will be
396 * taken care by dequeuing function
397 */
398 new_tid = ac_to_tid[ac_down][tid % 2];
399
400 return new_tid;
401 }
402
403 /*
404 * This function initializes the WMM state information and the
405 * WMM data path queues.
406 */
407 void
mwifiex_wmm_init(struct mwifiex_adapter * adapter)408 mwifiex_wmm_init(struct mwifiex_adapter *adapter)
409 {
410 int i, j;
411 struct mwifiex_private *priv;
412
413 for (j = 0; j < adapter->priv_num; ++j) {
414 priv = adapter->priv[j];
415 if (!priv)
416 continue;
417
418 for (i = 0; i < MAX_NUM_TID; ++i) {
419 if (!disable_tx_amsdu &&
420 adapter->tx_buf_size > MWIFIEX_TX_DATA_BUF_SIZE_2K)
421 priv->aggr_prio_tbl[i].amsdu =
422 priv->tos_to_tid_inv[i];
423 else
424 priv->aggr_prio_tbl[i].amsdu =
425 BA_STREAM_NOT_ALLOWED;
426 priv->aggr_prio_tbl[i].ampdu_ap =
427 priv->tos_to_tid_inv[i];
428 priv->aggr_prio_tbl[i].ampdu_user =
429 priv->tos_to_tid_inv[i];
430 }
431
432 priv->aggr_prio_tbl[6].amsdu
433 = priv->aggr_prio_tbl[6].ampdu_ap
434 = priv->aggr_prio_tbl[6].ampdu_user
435 = BA_STREAM_NOT_ALLOWED;
436
437 priv->aggr_prio_tbl[7].amsdu = priv->aggr_prio_tbl[7].ampdu_ap
438 = priv->aggr_prio_tbl[7].ampdu_user
439 = BA_STREAM_NOT_ALLOWED;
440
441 mwifiex_set_ba_params(priv);
442 mwifiex_reset_11n_rx_seq_num(priv);
443
444 priv->wmm.drv_pkt_delay_max = MWIFIEX_WMM_DRV_DELAY_MAX;
445 atomic_set(&priv->wmm.tx_pkts_queued, 0);
446 atomic_set(&priv->wmm.highest_queued_prio, HIGH_PRIO_TID);
447 }
448 }
449
mwifiex_bypass_txlist_empty(struct mwifiex_adapter * adapter)450 int mwifiex_bypass_txlist_empty(struct mwifiex_adapter *adapter)
451 {
452 struct mwifiex_private *priv;
453 int i;
454
455 for (i = 0; i < adapter->priv_num; i++) {
456 priv = adapter->priv[i];
457 if (!priv)
458 continue;
459 if (adapter->if_ops.is_port_ready &&
460 !adapter->if_ops.is_port_ready(priv))
461 continue;
462 if (!skb_queue_empty(&priv->bypass_txq))
463 return false;
464 }
465
466 return true;
467 }
468
469 /*
470 * This function checks if WMM Tx queue is empty.
471 */
472 int
mwifiex_wmm_lists_empty(struct mwifiex_adapter * adapter)473 mwifiex_wmm_lists_empty(struct mwifiex_adapter *adapter)
474 {
475 int i;
476 struct mwifiex_private *priv;
477
478 for (i = 0; i < adapter->priv_num; ++i) {
479 priv = adapter->priv[i];
480 if (!priv)
481 continue;
482 if (!priv->port_open &&
483 (priv->bss_mode != NL80211_IFTYPE_ADHOC))
484 continue;
485 if (adapter->if_ops.is_port_ready &&
486 !adapter->if_ops.is_port_ready(priv))
487 continue;
488 if (atomic_read(&priv->wmm.tx_pkts_queued))
489 return false;
490 }
491
492 return true;
493 }
494
495 /*
496 * This function deletes all packets in an RA list node.
497 *
498 * The packet sent completion callback handler are called with
499 * status failure, after they are dequeued to ensure proper
500 * cleanup. The RA list node itself is freed at the end.
501 */
502 static void
mwifiex_wmm_del_pkts_in_ralist_node(struct mwifiex_private * priv,struct mwifiex_ra_list_tbl * ra_list)503 mwifiex_wmm_del_pkts_in_ralist_node(struct mwifiex_private *priv,
504 struct mwifiex_ra_list_tbl *ra_list)
505 {
506 struct mwifiex_adapter *adapter = priv->adapter;
507 struct sk_buff *skb, *tmp;
508
509 skb_queue_walk_safe(&ra_list->skb_head, skb, tmp) {
510 skb_unlink(skb, &ra_list->skb_head);
511 mwifiex_write_data_complete(adapter, skb, 0, -1);
512 }
513 }
514
515 /*
516 * This function deletes all packets in an RA list.
517 *
518 * Each nodes in the RA list are freed individually first, and then
519 * the RA list itself is freed.
520 */
521 static void
mwifiex_wmm_del_pkts_in_ralist(struct mwifiex_private * priv,struct list_head * ra_list_head)522 mwifiex_wmm_del_pkts_in_ralist(struct mwifiex_private *priv,
523 struct list_head *ra_list_head)
524 {
525 struct mwifiex_ra_list_tbl *ra_list;
526
527 list_for_each_entry(ra_list, ra_list_head, list)
528 mwifiex_wmm_del_pkts_in_ralist_node(priv, ra_list);
529 }
530
531 /*
532 * This function deletes all packets in all RA lists.
533 */
mwifiex_wmm_cleanup_queues(struct mwifiex_private * priv)534 static void mwifiex_wmm_cleanup_queues(struct mwifiex_private *priv)
535 {
536 int i;
537
538 for (i = 0; i < MAX_NUM_TID; i++)
539 mwifiex_wmm_del_pkts_in_ralist(priv, &priv->wmm.tid_tbl_ptr[i].
540 ra_list);
541
542 atomic_set(&priv->wmm.tx_pkts_queued, 0);
543 atomic_set(&priv->wmm.highest_queued_prio, HIGH_PRIO_TID);
544 }
545
546 /*
547 * This function deletes all route addresses from all RA lists.
548 */
mwifiex_wmm_delete_all_ralist(struct mwifiex_private * priv)549 static void mwifiex_wmm_delete_all_ralist(struct mwifiex_private *priv)
550 {
551 struct mwifiex_ra_list_tbl *ra_list, *tmp_node;
552 int i;
553
554 for (i = 0; i < MAX_NUM_TID; ++i) {
555 mwifiex_dbg(priv->adapter, INFO,
556 "info: ra_list: freeing buf for tid %d\n", i);
557 list_for_each_entry_safe(ra_list, tmp_node,
558 &priv->wmm.tid_tbl_ptr[i].ra_list,
559 list) {
560 list_del(&ra_list->list);
561 kfree(ra_list);
562 }
563
564 INIT_LIST_HEAD(&priv->wmm.tid_tbl_ptr[i].ra_list);
565 }
566 }
567
mwifiex_free_ack_frame(int id,void * p,void * data)568 static int mwifiex_free_ack_frame(int id, void *p, void *data)
569 {
570 pr_warn("Have pending ack frames!\n");
571 kfree_skb(p);
572 return 0;
573 }
574
575 /*
576 * This function cleans up the Tx and Rx queues.
577 *
578 * Cleanup includes -
579 * - All packets in RA lists
580 * - All entries in Rx reorder table
581 * - All entries in Tx BA stream table
582 * - MPA buffer (if required)
583 * - All RA lists
584 */
585 void
mwifiex_clean_txrx(struct mwifiex_private * priv)586 mwifiex_clean_txrx(struct mwifiex_private *priv)
587 {
588 struct sk_buff *skb, *tmp;
589
590 mwifiex_11n_cleanup_reorder_tbl(priv);
591 spin_lock_bh(&priv->wmm.ra_list_spinlock);
592
593 mwifiex_wmm_cleanup_queues(priv);
594 mwifiex_11n_delete_all_tx_ba_stream_tbl(priv);
595
596 if (priv->adapter->if_ops.cleanup_mpa_buf)
597 priv->adapter->if_ops.cleanup_mpa_buf(priv->adapter);
598
599 mwifiex_wmm_delete_all_ralist(priv);
600 memcpy(tos_to_tid, ac_to_tid, sizeof(tos_to_tid));
601
602 if (priv->adapter->if_ops.clean_pcie_ring &&
603 !test_bit(MWIFIEX_SURPRISE_REMOVED, &priv->adapter->work_flags))
604 priv->adapter->if_ops.clean_pcie_ring(priv->adapter);
605 spin_unlock_bh(&priv->wmm.ra_list_spinlock);
606
607 skb_queue_walk_safe(&priv->tdls_txq, skb, tmp) {
608 skb_unlink(skb, &priv->tdls_txq);
609 mwifiex_write_data_complete(priv->adapter, skb, 0, -1);
610 }
611
612 skb_queue_walk_safe(&priv->bypass_txq, skb, tmp) {
613 skb_unlink(skb, &priv->bypass_txq);
614 mwifiex_write_data_complete(priv->adapter, skb, 0, -1);
615 }
616 atomic_set(&priv->adapter->bypass_tx_pending, 0);
617
618 idr_for_each(&priv->ack_status_frames, mwifiex_free_ack_frame, NULL);
619 idr_destroy(&priv->ack_status_frames);
620 }
621
622 /*
623 * This function retrieves a particular RA list node, matching with the
624 * given TID and RA address.
625 */
626 struct mwifiex_ra_list_tbl *
mwifiex_wmm_get_ralist_node(struct mwifiex_private * priv,u8 tid,const u8 * ra_addr)627 mwifiex_wmm_get_ralist_node(struct mwifiex_private *priv, u8 tid,
628 const u8 *ra_addr)
629 {
630 struct mwifiex_ra_list_tbl *ra_list;
631
632 list_for_each_entry(ra_list, &priv->wmm.tid_tbl_ptr[tid].ra_list,
633 list) {
634 if (!memcmp(ra_list->ra, ra_addr, ETH_ALEN))
635 return ra_list;
636 }
637
638 return NULL;
639 }
640
mwifiex_update_ralist_tx_pause(struct mwifiex_private * priv,u8 * mac,u8 tx_pause)641 void mwifiex_update_ralist_tx_pause(struct mwifiex_private *priv, u8 *mac,
642 u8 tx_pause)
643 {
644 struct mwifiex_ra_list_tbl *ra_list;
645 u32 pkt_cnt = 0, tx_pkts_queued;
646 int i;
647
648 spin_lock_bh(&priv->wmm.ra_list_spinlock);
649
650 for (i = 0; i < MAX_NUM_TID; ++i) {
651 ra_list = mwifiex_wmm_get_ralist_node(priv, i, mac);
652 if (ra_list && ra_list->tx_paused != tx_pause) {
653 pkt_cnt += ra_list->total_pkt_count;
654 ra_list->tx_paused = tx_pause;
655 if (tx_pause)
656 priv->wmm.pkts_paused[i] +=
657 ra_list->total_pkt_count;
658 else
659 priv->wmm.pkts_paused[i] -=
660 ra_list->total_pkt_count;
661 }
662 }
663
664 if (pkt_cnt) {
665 tx_pkts_queued = atomic_read(&priv->wmm.tx_pkts_queued);
666 if (tx_pause)
667 tx_pkts_queued -= pkt_cnt;
668 else
669 tx_pkts_queued += pkt_cnt;
670
671 atomic_set(&priv->wmm.tx_pkts_queued, tx_pkts_queued);
672 atomic_set(&priv->wmm.highest_queued_prio, HIGH_PRIO_TID);
673 }
674 spin_unlock_bh(&priv->wmm.ra_list_spinlock);
675 }
676
677 /* This function updates non-tdls peer ralist tx_pause while
678 * tdls channel switching
679 */
mwifiex_update_ralist_tx_pause_in_tdls_cs(struct mwifiex_private * priv,u8 * mac,u8 tx_pause)680 void mwifiex_update_ralist_tx_pause_in_tdls_cs(struct mwifiex_private *priv,
681 u8 *mac, u8 tx_pause)
682 {
683 struct mwifiex_ra_list_tbl *ra_list;
684 u32 pkt_cnt = 0, tx_pkts_queued;
685 int i;
686
687 spin_lock_bh(&priv->wmm.ra_list_spinlock);
688
689 for (i = 0; i < MAX_NUM_TID; ++i) {
690 list_for_each_entry(ra_list, &priv->wmm.tid_tbl_ptr[i].ra_list,
691 list) {
692 if (!memcmp(ra_list->ra, mac, ETH_ALEN))
693 continue;
694
695 if (ra_list->tx_paused != tx_pause) {
696 pkt_cnt += ra_list->total_pkt_count;
697 ra_list->tx_paused = tx_pause;
698 if (tx_pause)
699 priv->wmm.pkts_paused[i] +=
700 ra_list->total_pkt_count;
701 else
702 priv->wmm.pkts_paused[i] -=
703 ra_list->total_pkt_count;
704 }
705 }
706 }
707
708 if (pkt_cnt) {
709 tx_pkts_queued = atomic_read(&priv->wmm.tx_pkts_queued);
710 if (tx_pause)
711 tx_pkts_queued -= pkt_cnt;
712 else
713 tx_pkts_queued += pkt_cnt;
714
715 atomic_set(&priv->wmm.tx_pkts_queued, tx_pkts_queued);
716 atomic_set(&priv->wmm.highest_queued_prio, HIGH_PRIO_TID);
717 }
718 spin_unlock_bh(&priv->wmm.ra_list_spinlock);
719 }
720
721 /*
722 * This function retrieves an RA list node for a given TID and
723 * RA address pair.
724 *
725 * If no such node is found, a new node is added first and then
726 * retrieved.
727 */
728 struct mwifiex_ra_list_tbl *
mwifiex_wmm_get_queue_raptr(struct mwifiex_private * priv,u8 tid,const u8 * ra_addr)729 mwifiex_wmm_get_queue_raptr(struct mwifiex_private *priv, u8 tid,
730 const u8 *ra_addr)
731 {
732 struct mwifiex_ra_list_tbl *ra_list;
733
734 ra_list = mwifiex_wmm_get_ralist_node(priv, tid, ra_addr);
735 if (ra_list)
736 return ra_list;
737 mwifiex_ralist_add(priv, ra_addr);
738
739 return mwifiex_wmm_get_ralist_node(priv, tid, ra_addr);
740 }
741
742 /*
743 * This function deletes RA list nodes for given mac for all TIDs.
744 * Function also decrements TX pending count accordingly.
745 */
746 void
mwifiex_wmm_del_peer_ra_list(struct mwifiex_private * priv,const u8 * ra_addr)747 mwifiex_wmm_del_peer_ra_list(struct mwifiex_private *priv, const u8 *ra_addr)
748 {
749 struct mwifiex_ra_list_tbl *ra_list;
750 int i;
751
752 spin_lock_bh(&priv->wmm.ra_list_spinlock);
753
754 for (i = 0; i < MAX_NUM_TID; ++i) {
755 ra_list = mwifiex_wmm_get_ralist_node(priv, i, ra_addr);
756
757 if (!ra_list)
758 continue;
759 mwifiex_wmm_del_pkts_in_ralist_node(priv, ra_list);
760 if (ra_list->tx_paused)
761 priv->wmm.pkts_paused[i] -= ra_list->total_pkt_count;
762 else
763 atomic_sub(ra_list->total_pkt_count,
764 &priv->wmm.tx_pkts_queued);
765 list_del(&ra_list->list);
766 kfree(ra_list);
767 }
768 spin_unlock_bh(&priv->wmm.ra_list_spinlock);
769 }
770
771 /*
772 * This function checks if a particular RA list node exists in a given TID
773 * table index.
774 */
775 int
mwifiex_is_ralist_valid(struct mwifiex_private * priv,struct mwifiex_ra_list_tbl * ra_list,int ptr_index)776 mwifiex_is_ralist_valid(struct mwifiex_private *priv,
777 struct mwifiex_ra_list_tbl *ra_list, int ptr_index)
778 {
779 struct mwifiex_ra_list_tbl *rlist;
780
781 list_for_each_entry(rlist, &priv->wmm.tid_tbl_ptr[ptr_index].ra_list,
782 list) {
783 if (rlist == ra_list)
784 return true;
785 }
786
787 return false;
788 }
789
790 /*
791 * This function adds a packet to bypass TX queue.
792 * This is special TX queue for packets which can be sent even when port_open
793 * is false.
794 */
795 void
mwifiex_wmm_add_buf_bypass_txqueue(struct mwifiex_private * priv,struct sk_buff * skb)796 mwifiex_wmm_add_buf_bypass_txqueue(struct mwifiex_private *priv,
797 struct sk_buff *skb)
798 {
799 skb_queue_tail(&priv->bypass_txq, skb);
800 }
801
802 /*
803 * This function adds a packet to WMM queue.
804 *
805 * In disconnected state the packet is immediately dropped and the
806 * packet send completion callback is called with status failure.
807 *
808 * Otherwise, the correct RA list node is located and the packet
809 * is queued at the list tail.
810 */
811 void
mwifiex_wmm_add_buf_txqueue(struct mwifiex_private * priv,struct sk_buff * skb)812 mwifiex_wmm_add_buf_txqueue(struct mwifiex_private *priv,
813 struct sk_buff *skb)
814 {
815 struct mwifiex_adapter *adapter = priv->adapter;
816 u32 tid;
817 struct mwifiex_ra_list_tbl *ra_list;
818 u8 ra[ETH_ALEN], tid_down;
819 struct list_head list_head;
820 int tdls_status = TDLS_NOT_SETUP;
821 struct ethhdr *eth_hdr = (struct ethhdr *)skb->data;
822 struct mwifiex_txinfo *tx_info = MWIFIEX_SKB_TXCB(skb);
823
824 memcpy(ra, eth_hdr->h_dest, ETH_ALEN);
825
826 if (GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_STA &&
827 ISSUPP_TDLS_ENABLED(adapter->fw_cap_info)) {
828 if (ntohs(eth_hdr->h_proto) == ETH_P_TDLS)
829 mwifiex_dbg(adapter, DATA,
830 "TDLS setup packet for %pM.\t"
831 "Don't block\n", ra);
832 else if (memcmp(priv->cfg_bssid, ra, ETH_ALEN))
833 tdls_status = mwifiex_get_tdls_link_status(priv, ra);
834 }
835
836 if (!priv->media_connected && !mwifiex_is_skb_mgmt_frame(skb)) {
837 mwifiex_dbg(adapter, DATA, "data: drop packet in disconnect\n");
838 mwifiex_write_data_complete(adapter, skb, 0, -1);
839 return;
840 }
841
842 tid = skb->priority;
843
844 spin_lock_bh(&priv->wmm.ra_list_spinlock);
845
846 tid_down = mwifiex_wmm_downgrade_tid(priv, tid);
847
848 /* In case of infra as we have already created the list during
849 association we just don't have to call get_queue_raptr, we will
850 have only 1 raptr for a tid in case of infra */
851 if (!mwifiex_queuing_ra_based(priv) &&
852 !mwifiex_is_skb_mgmt_frame(skb)) {
853 switch (tdls_status) {
854 case TDLS_SETUP_COMPLETE:
855 case TDLS_CHAN_SWITCHING:
856 case TDLS_IN_BASE_CHAN:
857 case TDLS_IN_OFF_CHAN:
858 ra_list = mwifiex_wmm_get_queue_raptr(priv, tid_down,
859 ra);
860 tx_info->flags |= MWIFIEX_BUF_FLAG_TDLS_PKT;
861 break;
862 case TDLS_SETUP_INPROGRESS:
863 skb_queue_tail(&priv->tdls_txq, skb);
864 spin_unlock_bh(&priv->wmm.ra_list_spinlock);
865 return;
866 default:
867 list_head = priv->wmm.tid_tbl_ptr[tid_down].ra_list;
868 ra_list = list_first_entry_or_null(&list_head,
869 struct mwifiex_ra_list_tbl, list);
870 break;
871 }
872 } else {
873 memcpy(ra, skb->data, ETH_ALEN);
874 if (ra[0] & 0x01 || mwifiex_is_skb_mgmt_frame(skb))
875 eth_broadcast_addr(ra);
876 ra_list = mwifiex_wmm_get_queue_raptr(priv, tid_down, ra);
877 }
878
879 if (!ra_list) {
880 spin_unlock_bh(&priv->wmm.ra_list_spinlock);
881 mwifiex_write_data_complete(adapter, skb, 0, -1);
882 return;
883 }
884
885 skb_queue_tail(&ra_list->skb_head, skb);
886
887 ra_list->ba_pkt_count++;
888 ra_list->total_pkt_count++;
889
890 if (atomic_read(&priv->wmm.highest_queued_prio) <
891 priv->tos_to_tid_inv[tid_down])
892 atomic_set(&priv->wmm.highest_queued_prio,
893 priv->tos_to_tid_inv[tid_down]);
894
895 if (ra_list->tx_paused)
896 priv->wmm.pkts_paused[tid_down]++;
897 else
898 atomic_inc(&priv->wmm.tx_pkts_queued);
899
900 spin_unlock_bh(&priv->wmm.ra_list_spinlock);
901 }
902
903 /*
904 * This function processes the get WMM status command response from firmware.
905 *
906 * The response may contain multiple TLVs -
907 * - AC Queue status TLVs
908 * - Current WMM Parameter IE TLV
909 * - Admission Control action frame TLVs
910 *
911 * This function parses the TLVs and then calls further specific functions
912 * to process any changes in the queue prioritize or state.
913 */
mwifiex_ret_wmm_get_status(struct mwifiex_private * priv,const struct host_cmd_ds_command * resp)914 int mwifiex_ret_wmm_get_status(struct mwifiex_private *priv,
915 const struct host_cmd_ds_command *resp)
916 {
917 u8 *curr = (u8 *) &resp->params.get_wmm_status;
918 uint16_t resp_len = le16_to_cpu(resp->size), tlv_len;
919 int mask = IEEE80211_WMM_IE_AP_QOSINFO_PARAM_SET_CNT_MASK;
920 bool valid = true;
921
922 struct mwifiex_ie_types_data *tlv_hdr;
923 struct mwifiex_ie_types_wmm_queue_status *tlv_wmm_qstatus;
924 struct ieee_types_wmm_parameter *wmm_param_ie = NULL;
925 struct mwifiex_wmm_ac_status *ac_status;
926
927 mwifiex_dbg(priv->adapter, INFO,
928 "info: WMM: WMM_GET_STATUS cmdresp received: %d\n",
929 resp_len);
930
931 while ((resp_len >= sizeof(tlv_hdr->header)) && valid) {
932 tlv_hdr = (struct mwifiex_ie_types_data *) curr;
933 tlv_len = le16_to_cpu(tlv_hdr->header.len);
934
935 if (resp_len < tlv_len + sizeof(tlv_hdr->header))
936 break;
937
938 switch (le16_to_cpu(tlv_hdr->header.type)) {
939 case TLV_TYPE_WMMQSTATUS:
940 tlv_wmm_qstatus =
941 (struct mwifiex_ie_types_wmm_queue_status *)
942 tlv_hdr;
943 mwifiex_dbg(priv->adapter, CMD,
944 "info: CMD_RESP: WMM_GET_STATUS:\t"
945 "QSTATUS TLV: %d, %d, %d\n",
946 tlv_wmm_qstatus->queue_index,
947 tlv_wmm_qstatus->flow_required,
948 tlv_wmm_qstatus->disabled);
949
950 ac_status = &priv->wmm.ac_status[tlv_wmm_qstatus->
951 queue_index];
952 ac_status->disabled = tlv_wmm_qstatus->disabled;
953 ac_status->flow_required =
954 tlv_wmm_qstatus->flow_required;
955 ac_status->flow_created = tlv_wmm_qstatus->flow_created;
956 break;
957
958 case WLAN_EID_VENDOR_SPECIFIC:
959 /*
960 * Point the regular IEEE IE 2 bytes into the Marvell IE
961 * and setup the IEEE IE type and length byte fields
962 */
963
964 wmm_param_ie =
965 (struct ieee_types_wmm_parameter *) (curr +
966 2);
967 wmm_param_ie->vend_hdr.len = (u8) tlv_len;
968 wmm_param_ie->vend_hdr.element_id =
969 WLAN_EID_VENDOR_SPECIFIC;
970
971 mwifiex_dbg(priv->adapter, CMD,
972 "info: CMD_RESP: WMM_GET_STATUS:\t"
973 "WMM Parameter Set Count: %d\n",
974 wmm_param_ie->qos_info_bitmap & mask);
975
976 if (wmm_param_ie->vend_hdr.len + 2 >
977 sizeof(struct ieee_types_wmm_parameter))
978 break;
979
980 memcpy((u8 *) &priv->curr_bss_params.bss_descriptor.
981 wmm_ie, wmm_param_ie,
982 wmm_param_ie->vend_hdr.len + 2);
983
984 break;
985
986 default:
987 valid = false;
988 break;
989 }
990
991 curr += (tlv_len + sizeof(tlv_hdr->header));
992 resp_len -= (tlv_len + sizeof(tlv_hdr->header));
993 }
994
995 mwifiex_wmm_setup_queue_priorities(priv, wmm_param_ie);
996 mwifiex_wmm_setup_ac_downgrade(priv);
997
998 return 0;
999 }
1000
1001 /*
1002 * Callback handler from the command module to allow insertion of a WMM TLV.
1003 *
1004 * If the BSS we are associating to supports WMM, this function adds the
1005 * required WMM Information IE to the association request command buffer in
1006 * the form of a Marvell extended IEEE IE.
1007 */
1008 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)1009 mwifiex_wmm_process_association_req(struct mwifiex_private *priv,
1010 u8 **assoc_buf,
1011 struct ieee_types_wmm_parameter *wmm_ie,
1012 struct ieee80211_ht_cap *ht_cap)
1013 {
1014 struct mwifiex_ie_types_wmm_param_set *wmm_tlv;
1015 u32 ret_len = 0;
1016
1017 /* Null checks */
1018 if (!assoc_buf)
1019 return 0;
1020 if (!(*assoc_buf))
1021 return 0;
1022
1023 if (!wmm_ie)
1024 return 0;
1025
1026 mwifiex_dbg(priv->adapter, INFO,
1027 "info: WMM: process assoc req: bss->wmm_ie=%#x\n",
1028 wmm_ie->vend_hdr.element_id);
1029
1030 if ((priv->wmm_required ||
1031 (ht_cap && (priv->adapter->config_bands & BAND_GN ||
1032 priv->adapter->config_bands & BAND_AN))) &&
1033 wmm_ie->vend_hdr.element_id == WLAN_EID_VENDOR_SPECIFIC) {
1034 wmm_tlv = (struct mwifiex_ie_types_wmm_param_set *) *assoc_buf;
1035 wmm_tlv->header.type = cpu_to_le16((u16) wmm_info_ie[0]);
1036 wmm_tlv->header.len = cpu_to_le16((u16) wmm_info_ie[1]);
1037 memcpy(wmm_tlv->wmm_ie, &wmm_info_ie[2],
1038 le16_to_cpu(wmm_tlv->header.len));
1039 if (wmm_ie->qos_info_bitmap & IEEE80211_WMM_IE_AP_QOSINFO_UAPSD)
1040 memcpy((u8 *) (wmm_tlv->wmm_ie
1041 + le16_to_cpu(wmm_tlv->header.len)
1042 - sizeof(priv->wmm_qosinfo)),
1043 &priv->wmm_qosinfo, sizeof(priv->wmm_qosinfo));
1044
1045 ret_len = sizeof(wmm_tlv->header)
1046 + le16_to_cpu(wmm_tlv->header.len);
1047
1048 *assoc_buf += ret_len;
1049 }
1050
1051 return ret_len;
1052 }
1053
1054 /*
1055 * This function computes the time delay in the driver queues for a
1056 * given packet.
1057 *
1058 * When the packet is received at the OS/Driver interface, the current
1059 * time is set in the packet structure. The difference between the present
1060 * time and that received time is computed in this function and limited
1061 * based on pre-compiled limits in the driver.
1062 */
1063 u8
mwifiex_wmm_compute_drv_pkt_delay(struct mwifiex_private * priv,const struct sk_buff * skb)1064 mwifiex_wmm_compute_drv_pkt_delay(struct mwifiex_private *priv,
1065 const struct sk_buff *skb)
1066 {
1067 u32 queue_delay = ktime_to_ms(net_timedelta(skb->tstamp));
1068 u8 ret_val;
1069
1070 /*
1071 * Queue delay is passed as a uint8 in units of 2ms (ms shifted
1072 * by 1). Min value (other than 0) is therefore 2ms, max is 510ms.
1073 *
1074 * Pass max value if queue_delay is beyond the uint8 range
1075 */
1076 ret_val = (u8) (min(queue_delay, priv->wmm.drv_pkt_delay_max) >> 1);
1077
1078 mwifiex_dbg(priv->adapter, DATA, "data: WMM: Pkt Delay: %d ms,\t"
1079 "%d ms sent to FW\n", queue_delay, ret_val);
1080
1081 return ret_val;
1082 }
1083
1084 /*
1085 * This function retrieves the highest priority RA list table pointer.
1086 */
1087 static struct mwifiex_ra_list_tbl *
mwifiex_wmm_get_highest_priolist_ptr(struct mwifiex_adapter * adapter,struct mwifiex_private ** priv,int * tid)1088 mwifiex_wmm_get_highest_priolist_ptr(struct mwifiex_adapter *adapter,
1089 struct mwifiex_private **priv, int *tid)
1090 {
1091 struct mwifiex_private *priv_tmp;
1092 struct mwifiex_ra_list_tbl *ptr;
1093 struct mwifiex_tid_tbl *tid_ptr;
1094 atomic_t *hqp;
1095 int i, j;
1096
1097 /* check the BSS with highest priority first */
1098 for (j = adapter->priv_num - 1; j >= 0; --j) {
1099 /* iterate over BSS with the equal priority */
1100 list_for_each_entry(adapter->bss_prio_tbl[j].bss_prio_cur,
1101 &adapter->bss_prio_tbl[j].bss_prio_head,
1102 list) {
1103
1104 try_again:
1105 priv_tmp = adapter->bss_prio_tbl[j].bss_prio_cur->priv;
1106
1107 if (((priv_tmp->bss_mode != NL80211_IFTYPE_ADHOC) &&
1108 !priv_tmp->port_open) ||
1109 (atomic_read(&priv_tmp->wmm.tx_pkts_queued) == 0))
1110 continue;
1111
1112 if (adapter->if_ops.is_port_ready &&
1113 !adapter->if_ops.is_port_ready(priv_tmp))
1114 continue;
1115
1116 /* iterate over the WMM queues of the BSS */
1117 hqp = &priv_tmp->wmm.highest_queued_prio;
1118 for (i = atomic_read(hqp); i >= LOW_PRIO_TID; --i) {
1119
1120 spin_lock_bh(&priv_tmp->wmm.ra_list_spinlock);
1121
1122 tid_ptr = &(priv_tmp)->wmm.
1123 tid_tbl_ptr[tos_to_tid[i]];
1124
1125 /* iterate over receiver addresses */
1126 list_for_each_entry(ptr, &tid_ptr->ra_list,
1127 list) {
1128
1129 if (!ptr->tx_paused &&
1130 !skb_queue_empty(&ptr->skb_head))
1131 /* holds both locks */
1132 goto found;
1133 }
1134
1135 spin_unlock_bh(&priv_tmp->wmm.ra_list_spinlock);
1136 }
1137
1138 if (atomic_read(&priv_tmp->wmm.tx_pkts_queued) != 0) {
1139 atomic_set(&priv_tmp->wmm.highest_queued_prio,
1140 HIGH_PRIO_TID);
1141 /* Iterate current private once more, since
1142 * there still exist packets in data queue
1143 */
1144 goto try_again;
1145 } else
1146 atomic_set(&priv_tmp->wmm.highest_queued_prio,
1147 NO_PKT_PRIO_TID);
1148 }
1149 }
1150
1151 return NULL;
1152
1153 found:
1154 /* holds ra_list_spinlock */
1155 if (atomic_read(hqp) > i)
1156 atomic_set(hqp, i);
1157 spin_unlock_bh(&priv_tmp->wmm.ra_list_spinlock);
1158
1159 *priv = priv_tmp;
1160 *tid = tos_to_tid[i];
1161
1162 return ptr;
1163 }
1164
1165 /* This functions rotates ra and bss lists so packets are picked round robin.
1166 *
1167 * After a packet is successfully transmitted, rotate the ra list, so the ra
1168 * next to the one transmitted, will come first in the list. This way we pick
1169 * the ra' in a round robin fashion. Same applies to bss nodes of equal
1170 * priority.
1171 *
1172 * Function also increments wmm.packets_out counter.
1173 */
mwifiex_rotate_priolists(struct mwifiex_private * priv,struct mwifiex_ra_list_tbl * ra,int tid)1174 void mwifiex_rotate_priolists(struct mwifiex_private *priv,
1175 struct mwifiex_ra_list_tbl *ra,
1176 int tid)
1177 {
1178 struct mwifiex_adapter *adapter = priv->adapter;
1179 struct mwifiex_bss_prio_tbl *tbl = adapter->bss_prio_tbl;
1180 struct mwifiex_tid_tbl *tid_ptr = &priv->wmm.tid_tbl_ptr[tid];
1181
1182 spin_lock_bh(&tbl[priv->bss_priority].bss_prio_lock);
1183 /*
1184 * dirty trick: we remove 'head' temporarily and reinsert it after
1185 * curr bss node. imagine list to stay fixed while head is moved
1186 */
1187 list_move(&tbl[priv->bss_priority].bss_prio_head,
1188 &tbl[priv->bss_priority].bss_prio_cur->list);
1189 spin_unlock_bh(&tbl[priv->bss_priority].bss_prio_lock);
1190
1191 spin_lock_bh(&priv->wmm.ra_list_spinlock);
1192 if (mwifiex_is_ralist_valid(priv, ra, tid)) {
1193 priv->wmm.packets_out[tid]++;
1194 /* same as above */
1195 list_move(&tid_ptr->ra_list, &ra->list);
1196 }
1197 spin_unlock_bh(&priv->wmm.ra_list_spinlock);
1198 }
1199
1200 /*
1201 * This function checks if 11n aggregation is possible.
1202 */
1203 static int
mwifiex_is_11n_aggragation_possible(struct mwifiex_private * priv,struct mwifiex_ra_list_tbl * ptr,int max_buf_size)1204 mwifiex_is_11n_aggragation_possible(struct mwifiex_private *priv,
1205 struct mwifiex_ra_list_tbl *ptr,
1206 int max_buf_size)
1207 {
1208 int count = 0, total_size = 0;
1209 struct sk_buff *skb, *tmp;
1210 int max_amsdu_size;
1211
1212 if (priv->bss_role == MWIFIEX_BSS_ROLE_UAP && priv->ap_11n_enabled &&
1213 ptr->is_11n_enabled)
1214 max_amsdu_size = min_t(int, ptr->max_amsdu, max_buf_size);
1215 else
1216 max_amsdu_size = max_buf_size;
1217
1218 skb_queue_walk_safe(&ptr->skb_head, skb, tmp) {
1219 total_size += skb->len;
1220 if (total_size >= max_amsdu_size)
1221 break;
1222 if (++count >= MIN_NUM_AMSDU)
1223 return true;
1224 }
1225
1226 return false;
1227 }
1228
1229 /*
1230 * This function sends a single packet to firmware for transmission.
1231 */
1232 static void
mwifiex_send_single_packet(struct mwifiex_private * priv,struct mwifiex_ra_list_tbl * ptr,int ptr_index)1233 mwifiex_send_single_packet(struct mwifiex_private *priv,
1234 struct mwifiex_ra_list_tbl *ptr, int ptr_index)
1235 __releases(&priv->wmm.ra_list_spinlock)
1236 {
1237 struct sk_buff *skb, *skb_next;
1238 struct mwifiex_tx_param tx_param;
1239 struct mwifiex_adapter *adapter = priv->adapter;
1240 struct mwifiex_txinfo *tx_info;
1241
1242 if (skb_queue_empty(&ptr->skb_head)) {
1243 spin_unlock_bh(&priv->wmm.ra_list_spinlock);
1244 mwifiex_dbg(adapter, DATA, "data: nothing to send\n");
1245 return;
1246 }
1247
1248 skb = skb_dequeue(&ptr->skb_head);
1249
1250 tx_info = MWIFIEX_SKB_TXCB(skb);
1251 mwifiex_dbg(adapter, DATA,
1252 "data: dequeuing the packet %p %p\n", ptr, skb);
1253
1254 ptr->total_pkt_count--;
1255
1256 if (!skb_queue_empty(&ptr->skb_head))
1257 skb_next = skb_peek(&ptr->skb_head);
1258 else
1259 skb_next = NULL;
1260
1261 spin_unlock_bh(&priv->wmm.ra_list_spinlock);
1262
1263 tx_param.next_pkt_len = ((skb_next) ? skb_next->len +
1264 sizeof(struct txpd) : 0);
1265
1266 if (mwifiex_process_tx(priv, skb, &tx_param) == -EBUSY) {
1267 /* Queue the packet back at the head */
1268 spin_lock_bh(&priv->wmm.ra_list_spinlock);
1269
1270 if (!mwifiex_is_ralist_valid(priv, ptr, ptr_index)) {
1271 spin_unlock_bh(&priv->wmm.ra_list_spinlock);
1272 mwifiex_write_data_complete(adapter, skb, 0, -1);
1273 return;
1274 }
1275
1276 skb_queue_tail(&ptr->skb_head, skb);
1277
1278 ptr->total_pkt_count++;
1279 ptr->ba_pkt_count++;
1280 tx_info->flags |= MWIFIEX_BUF_FLAG_REQUEUED_PKT;
1281 spin_unlock_bh(&priv->wmm.ra_list_spinlock);
1282 } else {
1283 mwifiex_rotate_priolists(priv, ptr, ptr_index);
1284 atomic_dec(&priv->wmm.tx_pkts_queued);
1285 }
1286 }
1287
1288 /*
1289 * This function checks if the first packet in the given RA list
1290 * is already processed or not.
1291 */
1292 static int
mwifiex_is_ptr_processed(struct mwifiex_private * priv,struct mwifiex_ra_list_tbl * ptr)1293 mwifiex_is_ptr_processed(struct mwifiex_private *priv,
1294 struct mwifiex_ra_list_tbl *ptr)
1295 {
1296 struct sk_buff *skb;
1297 struct mwifiex_txinfo *tx_info;
1298
1299 if (skb_queue_empty(&ptr->skb_head))
1300 return false;
1301
1302 skb = skb_peek(&ptr->skb_head);
1303
1304 tx_info = MWIFIEX_SKB_TXCB(skb);
1305 if (tx_info->flags & MWIFIEX_BUF_FLAG_REQUEUED_PKT)
1306 return true;
1307
1308 return false;
1309 }
1310
1311 /*
1312 * This function sends a single processed packet to firmware for
1313 * transmission.
1314 */
1315 static void
mwifiex_send_processed_packet(struct mwifiex_private * priv,struct mwifiex_ra_list_tbl * ptr,int ptr_index)1316 mwifiex_send_processed_packet(struct mwifiex_private *priv,
1317 struct mwifiex_ra_list_tbl *ptr, int ptr_index)
1318 __releases(&priv->wmm.ra_list_spinlock)
1319 {
1320 struct mwifiex_tx_param tx_param;
1321 struct mwifiex_adapter *adapter = priv->adapter;
1322 int ret = -1;
1323 struct sk_buff *skb, *skb_next;
1324 struct mwifiex_txinfo *tx_info;
1325
1326 if (skb_queue_empty(&ptr->skb_head)) {
1327 spin_unlock_bh(&priv->wmm.ra_list_spinlock);
1328 return;
1329 }
1330
1331 skb = skb_dequeue(&ptr->skb_head);
1332
1333 if (adapter->data_sent || adapter->tx_lock_flag) {
1334 ptr->total_pkt_count--;
1335 spin_unlock_bh(&priv->wmm.ra_list_spinlock);
1336 skb_queue_tail(&adapter->tx_data_q, skb);
1337 atomic_dec(&priv->wmm.tx_pkts_queued);
1338 atomic_inc(&adapter->tx_queued);
1339 return;
1340 }
1341
1342 if (!skb_queue_empty(&ptr->skb_head))
1343 skb_next = skb_peek(&ptr->skb_head);
1344 else
1345 skb_next = NULL;
1346
1347 tx_info = MWIFIEX_SKB_TXCB(skb);
1348
1349 spin_unlock_bh(&priv->wmm.ra_list_spinlock);
1350
1351 tx_param.next_pkt_len =
1352 ((skb_next) ? skb_next->len +
1353 sizeof(struct txpd) : 0);
1354 if (adapter->iface_type == MWIFIEX_USB) {
1355 ret = adapter->if_ops.host_to_card(adapter, priv->usb_port,
1356 skb, &tx_param);
1357 } else {
1358 ret = adapter->if_ops.host_to_card(adapter, MWIFIEX_TYPE_DATA,
1359 skb, &tx_param);
1360 }
1361
1362 switch (ret) {
1363 case -EBUSY:
1364 mwifiex_dbg(adapter, ERROR, "data: -EBUSY is returned\n");
1365 spin_lock_bh(&priv->wmm.ra_list_spinlock);
1366
1367 if (!mwifiex_is_ralist_valid(priv, ptr, ptr_index)) {
1368 spin_unlock_bh(&priv->wmm.ra_list_spinlock);
1369 mwifiex_write_data_complete(adapter, skb, 0, -1);
1370 return;
1371 }
1372
1373 skb_queue_tail(&ptr->skb_head, skb);
1374
1375 tx_info->flags |= MWIFIEX_BUF_FLAG_REQUEUED_PKT;
1376 spin_unlock_bh(&priv->wmm.ra_list_spinlock);
1377 break;
1378 case -1:
1379 mwifiex_dbg(adapter, ERROR, "host_to_card failed: %#x\n", ret);
1380 adapter->dbg.num_tx_host_to_card_failure++;
1381 mwifiex_write_data_complete(adapter, skb, 0, ret);
1382 break;
1383 case -EINPROGRESS:
1384 break;
1385 case 0:
1386 mwifiex_write_data_complete(adapter, skb, 0, ret);
1387 break;
1388 default:
1389 break;
1390 }
1391 if (ret != -EBUSY) {
1392 mwifiex_rotate_priolists(priv, ptr, ptr_index);
1393 atomic_dec(&priv->wmm.tx_pkts_queued);
1394 spin_lock_bh(&priv->wmm.ra_list_spinlock);
1395 ptr->total_pkt_count--;
1396 spin_unlock_bh(&priv->wmm.ra_list_spinlock);
1397 }
1398 }
1399
1400 /*
1401 * This function dequeues a packet from the highest priority list
1402 * and transmits it.
1403 */
1404 static int
mwifiex_dequeue_tx_packet(struct mwifiex_adapter * adapter)1405 mwifiex_dequeue_tx_packet(struct mwifiex_adapter *adapter)
1406 {
1407 struct mwifiex_ra_list_tbl *ptr;
1408 struct mwifiex_private *priv = NULL;
1409 int ptr_index = 0;
1410 u8 ra[ETH_ALEN];
1411 int tid_del = 0, tid = 0;
1412
1413 ptr = mwifiex_wmm_get_highest_priolist_ptr(adapter, &priv, &ptr_index);
1414 if (!ptr)
1415 return -1;
1416
1417 tid = mwifiex_get_tid(ptr);
1418
1419 mwifiex_dbg(adapter, DATA, "data: tid=%d\n", tid);
1420
1421 spin_lock_bh(&priv->wmm.ra_list_spinlock);
1422 if (!mwifiex_is_ralist_valid(priv, ptr, ptr_index)) {
1423 spin_unlock_bh(&priv->wmm.ra_list_spinlock);
1424 return -1;
1425 }
1426
1427 if (mwifiex_is_ptr_processed(priv, ptr)) {
1428 mwifiex_send_processed_packet(priv, ptr, ptr_index);
1429 /* ra_list_spinlock has been freed in
1430 mwifiex_send_processed_packet() */
1431 return 0;
1432 }
1433
1434 if (!ptr->is_11n_enabled ||
1435 ptr->ba_status ||
1436 priv->wps.session_enable) {
1437 if (ptr->is_11n_enabled &&
1438 ptr->ba_status &&
1439 ptr->amsdu_in_ampdu &&
1440 mwifiex_is_amsdu_allowed(priv, tid) &&
1441 mwifiex_is_11n_aggragation_possible(priv, ptr,
1442 adapter->tx_buf_size))
1443 mwifiex_11n_aggregate_pkt(priv, ptr, ptr_index);
1444 /* ra_list_spinlock has been freed in
1445 * mwifiex_11n_aggregate_pkt()
1446 */
1447 else
1448 mwifiex_send_single_packet(priv, ptr, ptr_index);
1449 /* ra_list_spinlock has been freed in
1450 * mwifiex_send_single_packet()
1451 */
1452 } else {
1453 if (mwifiex_is_ampdu_allowed(priv, ptr, tid) &&
1454 ptr->ba_pkt_count > ptr->ba_packet_thr) {
1455 if (mwifiex_space_avail_for_new_ba_stream(adapter)) {
1456 mwifiex_create_ba_tbl(priv, ptr->ra, tid,
1457 BA_SETUP_INPROGRESS);
1458 mwifiex_send_addba(priv, tid, ptr->ra);
1459 } else if (mwifiex_find_stream_to_delete
1460 (priv, tid, &tid_del, ra)) {
1461 mwifiex_create_ba_tbl(priv, ptr->ra, tid,
1462 BA_SETUP_INPROGRESS);
1463 mwifiex_send_delba(priv, tid_del, ra, 1);
1464 }
1465 }
1466 if (mwifiex_is_amsdu_allowed(priv, tid) &&
1467 mwifiex_is_11n_aggragation_possible(priv, ptr,
1468 adapter->tx_buf_size))
1469 mwifiex_11n_aggregate_pkt(priv, ptr, ptr_index);
1470 /* ra_list_spinlock has been freed in
1471 mwifiex_11n_aggregate_pkt() */
1472 else
1473 mwifiex_send_single_packet(priv, ptr, ptr_index);
1474 /* ra_list_spinlock has been freed in
1475 mwifiex_send_single_packet() */
1476 }
1477 return 0;
1478 }
1479
mwifiex_process_bypass_tx(struct mwifiex_adapter * adapter)1480 void mwifiex_process_bypass_tx(struct mwifiex_adapter *adapter)
1481 {
1482 struct mwifiex_tx_param tx_param;
1483 struct sk_buff *skb;
1484 struct mwifiex_txinfo *tx_info;
1485 struct mwifiex_private *priv;
1486 int i;
1487
1488 if (adapter->data_sent || adapter->tx_lock_flag)
1489 return;
1490
1491 for (i = 0; i < adapter->priv_num; ++i) {
1492 priv = adapter->priv[i];
1493
1494 if (!priv)
1495 continue;
1496
1497 if (adapter->if_ops.is_port_ready &&
1498 !adapter->if_ops.is_port_ready(priv))
1499 continue;
1500
1501 if (skb_queue_empty(&priv->bypass_txq))
1502 continue;
1503
1504 skb = skb_dequeue(&priv->bypass_txq);
1505 tx_info = MWIFIEX_SKB_TXCB(skb);
1506
1507 /* no aggregation for bypass packets */
1508 tx_param.next_pkt_len = 0;
1509
1510 if (mwifiex_process_tx(priv, skb, &tx_param) == -EBUSY) {
1511 skb_queue_head(&priv->bypass_txq, skb);
1512 tx_info->flags |= MWIFIEX_BUF_FLAG_REQUEUED_PKT;
1513 } else {
1514 atomic_dec(&adapter->bypass_tx_pending);
1515 }
1516 }
1517 }
1518
1519 /*
1520 * This function transmits the highest priority packet awaiting in the
1521 * WMM Queues.
1522 */
1523 void
mwifiex_wmm_process_tx(struct mwifiex_adapter * adapter)1524 mwifiex_wmm_process_tx(struct mwifiex_adapter *adapter)
1525 {
1526 do {
1527 if (mwifiex_dequeue_tx_packet(adapter))
1528 break;
1529 if (adapter->iface_type != MWIFIEX_SDIO) {
1530 if (adapter->data_sent ||
1531 adapter->tx_lock_flag)
1532 break;
1533 } else {
1534 if (atomic_read(&adapter->tx_queued) >=
1535 MWIFIEX_MAX_PKTS_TXQ)
1536 break;
1537 }
1538 } while (!mwifiex_wmm_lists_empty(adapter));
1539 }
1540