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