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[deliverable/linux.git] / drivers / net / wireless / marvell / mwifiex / 11n_rxreorder.c
1 /*
2 * Marvell Wireless LAN device driver: 802.11n RX Re-ordering
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 #include "11n_rxreorder.h"
28
29 /* This function will dispatch amsdu packet and forward it to kernel/upper
30 * layer.
31 */
32 static int mwifiex_11n_dispatch_amsdu_pkt(struct mwifiex_private *priv,
33 struct sk_buff *skb)
34 {
35 struct rxpd *local_rx_pd = (struct rxpd *)(skb->data);
36 int ret;
37
38 if (le16_to_cpu(local_rx_pd->rx_pkt_type) == PKT_TYPE_AMSDU) {
39 struct sk_buff_head list;
40 struct sk_buff *rx_skb;
41
42 __skb_queue_head_init(&list);
43
44 skb_pull(skb, le16_to_cpu(local_rx_pd->rx_pkt_offset));
45 skb_trim(skb, le16_to_cpu(local_rx_pd->rx_pkt_length));
46
47 ieee80211_amsdu_to_8023s(skb, &list, priv->curr_addr,
48 priv->wdev.iftype, 0, false);
49
50 while (!skb_queue_empty(&list)) {
51 struct rx_packet_hdr *rx_hdr;
52
53 rx_skb = __skb_dequeue(&list);
54 rx_hdr = (struct rx_packet_hdr *)rx_skb->data;
55 if (ISSUPP_TDLS_ENABLED(priv->adapter->fw_cap_info) &&
56 ntohs(rx_hdr->eth803_hdr.h_proto) == ETH_P_TDLS) {
57 mwifiex_process_tdls_action_frame(priv,
58 (u8 *)rx_hdr,
59 skb->len);
60 }
61
62 if (priv->bss_role == MWIFIEX_BSS_ROLE_UAP)
63 ret = mwifiex_uap_recv_packet(priv, rx_skb);
64 else
65 ret = mwifiex_recv_packet(priv, rx_skb);
66 if (ret == -1)
67 mwifiex_dbg(priv->adapter, ERROR,
68 "Rx of A-MSDU failed");
69 }
70 return 0;
71 }
72
73 return -1;
74 }
75
76 /* This function will process the rx packet and forward it to kernel/upper
77 * layer.
78 */
79 static int mwifiex_11n_dispatch_pkt(struct mwifiex_private *priv, void *payload)
80 {
81 int ret = mwifiex_11n_dispatch_amsdu_pkt(priv, payload);
82
83 if (!ret)
84 return 0;
85
86 if (priv->bss_role == MWIFIEX_BSS_ROLE_UAP)
87 return mwifiex_handle_uap_rx_forward(priv, payload);
88
89 return mwifiex_process_rx_packet(priv, payload);
90 }
91
92 /*
93 * This function dispatches all packets in the Rx reorder table until the
94 * start window.
95 *
96 * There could be holes in the buffer, which are skipped by the function.
97 * Since the buffer is linear, the function uses rotation to simulate
98 * circular buffer.
99 */
100 static void
101 mwifiex_11n_dispatch_pkt_until_start_win(struct mwifiex_private *priv,
102 struct mwifiex_rx_reorder_tbl *tbl,
103 int start_win)
104 {
105 int pkt_to_send, i;
106 void *rx_tmp_ptr;
107 unsigned long flags;
108
109 pkt_to_send = (start_win > tbl->start_win) ?
110 min((start_win - tbl->start_win), tbl->win_size) :
111 tbl->win_size;
112
113 for (i = 0; i < pkt_to_send; ++i) {
114 spin_lock_irqsave(&priv->rx_pkt_lock, flags);
115 rx_tmp_ptr = NULL;
116 if (tbl->rx_reorder_ptr[i]) {
117 rx_tmp_ptr = tbl->rx_reorder_ptr[i];
118 tbl->rx_reorder_ptr[i] = NULL;
119 }
120 spin_unlock_irqrestore(&priv->rx_pkt_lock, flags);
121 if (rx_tmp_ptr)
122 mwifiex_11n_dispatch_pkt(priv, rx_tmp_ptr);
123 }
124
125 spin_lock_irqsave(&priv->rx_pkt_lock, flags);
126 /*
127 * We don't have a circular buffer, hence use rotation to simulate
128 * circular buffer
129 */
130 for (i = 0; i < tbl->win_size - pkt_to_send; ++i) {
131 tbl->rx_reorder_ptr[i] = tbl->rx_reorder_ptr[pkt_to_send + i];
132 tbl->rx_reorder_ptr[pkt_to_send + i] = NULL;
133 }
134
135 tbl->start_win = start_win;
136 spin_unlock_irqrestore(&priv->rx_pkt_lock, flags);
137 }
138
139 /*
140 * This function dispatches all packets in the Rx reorder table until
141 * a hole is found.
142 *
143 * The start window is adjusted automatically when a hole is located.
144 * Since the buffer is linear, the function uses rotation to simulate
145 * circular buffer.
146 */
147 static void
148 mwifiex_11n_scan_and_dispatch(struct mwifiex_private *priv,
149 struct mwifiex_rx_reorder_tbl *tbl)
150 {
151 int i, j, xchg;
152 void *rx_tmp_ptr;
153 unsigned long flags;
154
155 for (i = 0; i < tbl->win_size; ++i) {
156 spin_lock_irqsave(&priv->rx_pkt_lock, flags);
157 if (!tbl->rx_reorder_ptr[i]) {
158 spin_unlock_irqrestore(&priv->rx_pkt_lock, flags);
159 break;
160 }
161 rx_tmp_ptr = tbl->rx_reorder_ptr[i];
162 tbl->rx_reorder_ptr[i] = NULL;
163 spin_unlock_irqrestore(&priv->rx_pkt_lock, flags);
164 mwifiex_11n_dispatch_pkt(priv, rx_tmp_ptr);
165 }
166
167 spin_lock_irqsave(&priv->rx_pkt_lock, flags);
168 /*
169 * We don't have a circular buffer, hence use rotation to simulate
170 * circular buffer
171 */
172 if (i > 0) {
173 xchg = tbl->win_size - i;
174 for (j = 0; j < xchg; ++j) {
175 tbl->rx_reorder_ptr[j] = tbl->rx_reorder_ptr[i + j];
176 tbl->rx_reorder_ptr[i + j] = NULL;
177 }
178 }
179 tbl->start_win = (tbl->start_win + i) & (MAX_TID_VALUE - 1);
180 spin_unlock_irqrestore(&priv->rx_pkt_lock, flags);
181 }
182
183 /*
184 * This function deletes the Rx reorder table and frees the memory.
185 *
186 * The function stops the associated timer and dispatches all the
187 * pending packets in the Rx reorder table before deletion.
188 */
189 static void
190 mwifiex_del_rx_reorder_entry(struct mwifiex_private *priv,
191 struct mwifiex_rx_reorder_tbl *tbl)
192 {
193 unsigned long flags;
194 int start_win;
195
196 if (!tbl)
197 return;
198
199 spin_lock_irqsave(&priv->adapter->rx_proc_lock, flags);
200 priv->adapter->rx_locked = true;
201 if (priv->adapter->rx_processing) {
202 spin_unlock_irqrestore(&priv->adapter->rx_proc_lock, flags);
203 flush_workqueue(priv->adapter->rx_workqueue);
204 } else {
205 spin_unlock_irqrestore(&priv->adapter->rx_proc_lock, flags);
206 }
207
208 start_win = (tbl->start_win + tbl->win_size) & (MAX_TID_VALUE - 1);
209 mwifiex_11n_dispatch_pkt_until_start_win(priv, tbl, start_win);
210
211 del_timer_sync(&tbl->timer_context.timer);
212 tbl->timer_context.timer_is_set = false;
213
214 spin_lock_irqsave(&priv->rx_reorder_tbl_lock, flags);
215 list_del(&tbl->list);
216 spin_unlock_irqrestore(&priv->rx_reorder_tbl_lock, flags);
217
218 kfree(tbl->rx_reorder_ptr);
219 kfree(tbl);
220
221 spin_lock_irqsave(&priv->adapter->rx_proc_lock, flags);
222 priv->adapter->rx_locked = false;
223 spin_unlock_irqrestore(&priv->adapter->rx_proc_lock, flags);
224
225 }
226
227 /*
228 * This function returns the pointer to an entry in Rx reordering
229 * table which matches the given TA/TID pair.
230 */
231 struct mwifiex_rx_reorder_tbl *
232 mwifiex_11n_get_rx_reorder_tbl(struct mwifiex_private *priv, int tid, u8 *ta)
233 {
234 struct mwifiex_rx_reorder_tbl *tbl;
235 unsigned long flags;
236
237 spin_lock_irqsave(&priv->rx_reorder_tbl_lock, flags);
238 list_for_each_entry(tbl, &priv->rx_reorder_tbl_ptr, list) {
239 if (!memcmp(tbl->ta, ta, ETH_ALEN) && tbl->tid == tid) {
240 spin_unlock_irqrestore(&priv->rx_reorder_tbl_lock,
241 flags);
242 return tbl;
243 }
244 }
245 spin_unlock_irqrestore(&priv->rx_reorder_tbl_lock, flags);
246
247 return NULL;
248 }
249
250 /* This function retrieves the pointer to an entry in Rx reordering
251 * table which matches the given TA and deletes it.
252 */
253 void mwifiex_11n_del_rx_reorder_tbl_by_ta(struct mwifiex_private *priv, u8 *ta)
254 {
255 struct mwifiex_rx_reorder_tbl *tbl, *tmp;
256 unsigned long flags;
257
258 if (!ta)
259 return;
260
261 spin_lock_irqsave(&priv->rx_reorder_tbl_lock, flags);
262 list_for_each_entry_safe(tbl, tmp, &priv->rx_reorder_tbl_ptr, list) {
263 if (!memcmp(tbl->ta, ta, ETH_ALEN)) {
264 spin_unlock_irqrestore(&priv->rx_reorder_tbl_lock,
265 flags);
266 mwifiex_del_rx_reorder_entry(priv, tbl);
267 spin_lock_irqsave(&priv->rx_reorder_tbl_lock, flags);
268 }
269 }
270 spin_unlock_irqrestore(&priv->rx_reorder_tbl_lock, flags);
271
272 return;
273 }
274
275 /*
276 * This function finds the last sequence number used in the packets
277 * buffered in Rx reordering table.
278 */
279 static int
280 mwifiex_11n_find_last_seq_num(struct reorder_tmr_cnxt *ctx)
281 {
282 struct mwifiex_rx_reorder_tbl *rx_reorder_tbl_ptr = ctx->ptr;
283 struct mwifiex_private *priv = ctx->priv;
284 unsigned long flags;
285 int i;
286
287 spin_lock_irqsave(&priv->rx_reorder_tbl_lock, flags);
288 for (i = rx_reorder_tbl_ptr->win_size - 1; i >= 0; --i) {
289 if (rx_reorder_tbl_ptr->rx_reorder_ptr[i]) {
290 spin_unlock_irqrestore(&priv->rx_reorder_tbl_lock,
291 flags);
292 return i;
293 }
294 }
295 spin_unlock_irqrestore(&priv->rx_reorder_tbl_lock, flags);
296
297 return -1;
298 }
299
300 /*
301 * This function flushes all the packets in Rx reordering table.
302 *
303 * The function checks if any packets are currently buffered in the
304 * table or not. In case there are packets available, it dispatches
305 * them and then dumps the Rx reordering table.
306 */
307 static void
308 mwifiex_flush_data(unsigned long context)
309 {
310 struct reorder_tmr_cnxt *ctx =
311 (struct reorder_tmr_cnxt *) context;
312 int start_win, seq_num;
313
314 ctx->timer_is_set = false;
315 seq_num = mwifiex_11n_find_last_seq_num(ctx);
316
317 if (seq_num < 0)
318 return;
319
320 mwifiex_dbg(ctx->priv->adapter, INFO, "info: flush data %d\n", seq_num);
321 start_win = (ctx->ptr->start_win + seq_num + 1) & (MAX_TID_VALUE - 1);
322 mwifiex_11n_dispatch_pkt_until_start_win(ctx->priv, ctx->ptr,
323 start_win);
324 }
325
326 /*
327 * This function creates an entry in Rx reordering table for the
328 * given TA/TID.
329 *
330 * The function also initializes the entry with sequence number, window
331 * size as well as initializes the timer.
332 *
333 * If the received TA/TID pair is already present, all the packets are
334 * dispatched and the window size is moved until the SSN.
335 */
336 static void
337 mwifiex_11n_create_rx_reorder_tbl(struct mwifiex_private *priv, u8 *ta,
338 int tid, int win_size, int seq_num)
339 {
340 int i;
341 struct mwifiex_rx_reorder_tbl *tbl, *new_node;
342 u16 last_seq = 0;
343 unsigned long flags;
344 struct mwifiex_sta_node *node;
345
346 /*
347 * If we get a TID, ta pair which is already present dispatch all the
348 * the packets and move the window size until the ssn
349 */
350 tbl = mwifiex_11n_get_rx_reorder_tbl(priv, tid, ta);
351 if (tbl) {
352 mwifiex_11n_dispatch_pkt_until_start_win(priv, tbl, seq_num);
353 return;
354 }
355 /* if !tbl then create one */
356 new_node = kzalloc(sizeof(struct mwifiex_rx_reorder_tbl), GFP_KERNEL);
357 if (!new_node)
358 return;
359
360 INIT_LIST_HEAD(&new_node->list);
361 new_node->tid = tid;
362 memcpy(new_node->ta, ta, ETH_ALEN);
363 new_node->start_win = seq_num;
364 new_node->init_win = seq_num;
365 new_node->flags = 0;
366
367 spin_lock_irqsave(&priv->sta_list_spinlock, flags);
368 if (mwifiex_queuing_ra_based(priv)) {
369 if (priv->bss_role == MWIFIEX_BSS_ROLE_UAP) {
370 node = mwifiex_get_sta_entry(priv, ta);
371 if (node)
372 last_seq = node->rx_seq[tid];
373 }
374 } else {
375 node = mwifiex_get_sta_entry(priv, ta);
376 if (node)
377 last_seq = node->rx_seq[tid];
378 else
379 last_seq = priv->rx_seq[tid];
380 }
381 spin_unlock_irqrestore(&priv->sta_list_spinlock, flags);
382
383 mwifiex_dbg(priv->adapter, INFO,
384 "info: last_seq=%d start_win=%d\n",
385 last_seq, new_node->start_win);
386
387 if (last_seq != MWIFIEX_DEF_11N_RX_SEQ_NUM &&
388 last_seq >= new_node->start_win) {
389 new_node->start_win = last_seq + 1;
390 new_node->flags |= RXREOR_INIT_WINDOW_SHIFT;
391 }
392
393 new_node->win_size = win_size;
394
395 new_node->rx_reorder_ptr = kzalloc(sizeof(void *) * win_size,
396 GFP_KERNEL);
397 if (!new_node->rx_reorder_ptr) {
398 kfree((u8 *) new_node);
399 mwifiex_dbg(priv->adapter, ERROR,
400 "%s: failed to alloc reorder_ptr\n", __func__);
401 return;
402 }
403
404 new_node->timer_context.ptr = new_node;
405 new_node->timer_context.priv = priv;
406 new_node->timer_context.timer_is_set = false;
407
408 setup_timer(&new_node->timer_context.timer, mwifiex_flush_data,
409 (unsigned long)&new_node->timer_context);
410
411 for (i = 0; i < win_size; ++i)
412 new_node->rx_reorder_ptr[i] = NULL;
413
414 spin_lock_irqsave(&priv->rx_reorder_tbl_lock, flags);
415 list_add_tail(&new_node->list, &priv->rx_reorder_tbl_ptr);
416 spin_unlock_irqrestore(&priv->rx_reorder_tbl_lock, flags);
417 }
418
419 static void
420 mwifiex_11n_rxreorder_timer_restart(struct mwifiex_rx_reorder_tbl *tbl)
421 {
422 u32 min_flush_time;
423
424 if (tbl->win_size >= MWIFIEX_BA_WIN_SIZE_32)
425 min_flush_time = MIN_FLUSH_TIMER_15_MS;
426 else
427 min_flush_time = MIN_FLUSH_TIMER_MS;
428
429 mod_timer(&tbl->timer_context.timer,
430 jiffies + msecs_to_jiffies(min_flush_time * tbl->win_size));
431
432 tbl->timer_context.timer_is_set = true;
433 }
434
435 /*
436 * This function prepares command for adding a BA request.
437 *
438 * Preparation includes -
439 * - Setting command ID and proper size
440 * - Setting add BA request buffer
441 * - Ensuring correct endian-ness
442 */
443 int mwifiex_cmd_11n_addba_req(struct host_cmd_ds_command *cmd, void *data_buf)
444 {
445 struct host_cmd_ds_11n_addba_req *add_ba_req = &cmd->params.add_ba_req;
446
447 cmd->command = cpu_to_le16(HostCmd_CMD_11N_ADDBA_REQ);
448 cmd->size = cpu_to_le16(sizeof(*add_ba_req) + S_DS_GEN);
449 memcpy(add_ba_req, data_buf, sizeof(*add_ba_req));
450
451 return 0;
452 }
453
454 /*
455 * This function prepares command for adding a BA response.
456 *
457 * Preparation includes -
458 * - Setting command ID and proper size
459 * - Setting add BA response buffer
460 * - Ensuring correct endian-ness
461 */
462 int mwifiex_cmd_11n_addba_rsp_gen(struct mwifiex_private *priv,
463 struct host_cmd_ds_command *cmd,
464 struct host_cmd_ds_11n_addba_req
465 *cmd_addba_req)
466 {
467 struct host_cmd_ds_11n_addba_rsp *add_ba_rsp = &cmd->params.add_ba_rsp;
468 struct mwifiex_sta_node *sta_ptr;
469 u32 rx_win_size = priv->add_ba_param.rx_win_size;
470 u8 tid;
471 int win_size;
472 unsigned long flags;
473 uint16_t block_ack_param_set;
474
475 if ((GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_STA) &&
476 ISSUPP_TDLS_ENABLED(priv->adapter->fw_cap_info) &&
477 priv->adapter->is_hw_11ac_capable &&
478 memcmp(priv->cfg_bssid, cmd_addba_req->peer_mac_addr, ETH_ALEN)) {
479 spin_lock_irqsave(&priv->sta_list_spinlock, flags);
480 sta_ptr = mwifiex_get_sta_entry(priv,
481 cmd_addba_req->peer_mac_addr);
482 if (!sta_ptr) {
483 spin_unlock_irqrestore(&priv->sta_list_spinlock, flags);
484 mwifiex_dbg(priv->adapter, ERROR,
485 "BA setup with unknown TDLS peer %pM!\n",
486 cmd_addba_req->peer_mac_addr);
487 return -1;
488 }
489 if (sta_ptr->is_11ac_enabled)
490 rx_win_size = MWIFIEX_11AC_STA_AMPDU_DEF_RXWINSIZE;
491 spin_unlock_irqrestore(&priv->sta_list_spinlock, flags);
492 }
493
494 cmd->command = cpu_to_le16(HostCmd_CMD_11N_ADDBA_RSP);
495 cmd->size = cpu_to_le16(sizeof(*add_ba_rsp) + S_DS_GEN);
496
497 memcpy(add_ba_rsp->peer_mac_addr, cmd_addba_req->peer_mac_addr,
498 ETH_ALEN);
499 add_ba_rsp->dialog_token = cmd_addba_req->dialog_token;
500 add_ba_rsp->block_ack_tmo = cmd_addba_req->block_ack_tmo;
501 add_ba_rsp->ssn = cmd_addba_req->ssn;
502
503 block_ack_param_set = le16_to_cpu(cmd_addba_req->block_ack_param_set);
504 tid = (block_ack_param_set & IEEE80211_ADDBA_PARAM_TID_MASK)
505 >> BLOCKACKPARAM_TID_POS;
506 add_ba_rsp->status_code = cpu_to_le16(ADDBA_RSP_STATUS_ACCEPT);
507 block_ack_param_set &= ~IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK;
508
509 /* If we don't support AMSDU inside AMPDU, reset the bit */
510 if (!priv->add_ba_param.rx_amsdu ||
511 (priv->aggr_prio_tbl[tid].amsdu == BA_STREAM_NOT_ALLOWED))
512 block_ack_param_set &= ~BLOCKACKPARAM_AMSDU_SUPP_MASK;
513 block_ack_param_set |= rx_win_size << BLOCKACKPARAM_WINSIZE_POS;
514 add_ba_rsp->block_ack_param_set = cpu_to_le16(block_ack_param_set);
515 win_size = (le16_to_cpu(add_ba_rsp->block_ack_param_set)
516 & IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK)
517 >> BLOCKACKPARAM_WINSIZE_POS;
518 cmd_addba_req->block_ack_param_set = cpu_to_le16(block_ack_param_set);
519
520 mwifiex_11n_create_rx_reorder_tbl(priv, cmd_addba_req->peer_mac_addr,
521 tid, win_size,
522 le16_to_cpu(cmd_addba_req->ssn));
523 return 0;
524 }
525
526 /*
527 * This function prepares command for deleting a BA request.
528 *
529 * Preparation includes -
530 * - Setting command ID and proper size
531 * - Setting del BA request buffer
532 * - Ensuring correct endian-ness
533 */
534 int mwifiex_cmd_11n_delba(struct host_cmd_ds_command *cmd, void *data_buf)
535 {
536 struct host_cmd_ds_11n_delba *del_ba = &cmd->params.del_ba;
537
538 cmd->command = cpu_to_le16(HostCmd_CMD_11N_DELBA);
539 cmd->size = cpu_to_le16(sizeof(*del_ba) + S_DS_GEN);
540 memcpy(del_ba, data_buf, sizeof(*del_ba));
541
542 return 0;
543 }
544
545 /*
546 * This function identifies if Rx reordering is needed for a received packet.
547 *
548 * In case reordering is required, the function will do the reordering
549 * before sending it to kernel.
550 *
551 * The Rx reorder table is checked first with the received TID/TA pair. If
552 * not found, the received packet is dispatched immediately. But if found,
553 * the packet is reordered and all the packets in the updated Rx reordering
554 * table is dispatched until a hole is found.
555 *
556 * For sequence number less than the starting window, the packet is dropped.
557 */
558 int mwifiex_11n_rx_reorder_pkt(struct mwifiex_private *priv,
559 u16 seq_num, u16 tid,
560 u8 *ta, u8 pkt_type, void *payload)
561 {
562 struct mwifiex_rx_reorder_tbl *tbl;
563 int prev_start_win, start_win, end_win, win_size;
564 u16 pkt_index;
565 bool init_window_shift = false;
566 int ret = 0;
567
568 tbl = mwifiex_11n_get_rx_reorder_tbl(priv, tid, ta);
569 if (!tbl) {
570 if (pkt_type != PKT_TYPE_BAR)
571 mwifiex_11n_dispatch_pkt(priv, payload);
572 return ret;
573 }
574
575 if ((pkt_type == PKT_TYPE_AMSDU) && !tbl->amsdu) {
576 mwifiex_11n_dispatch_pkt(priv, payload);
577 return ret;
578 }
579
580 start_win = tbl->start_win;
581 prev_start_win = start_win;
582 win_size = tbl->win_size;
583 end_win = ((start_win + win_size) - 1) & (MAX_TID_VALUE - 1);
584 if (tbl->flags & RXREOR_INIT_WINDOW_SHIFT) {
585 init_window_shift = true;
586 tbl->flags &= ~RXREOR_INIT_WINDOW_SHIFT;
587 }
588
589 if (tbl->flags & RXREOR_FORCE_NO_DROP) {
590 mwifiex_dbg(priv->adapter, INFO,
591 "RXREOR_FORCE_NO_DROP when HS is activated\n");
592 tbl->flags &= ~RXREOR_FORCE_NO_DROP;
593 } else if (init_window_shift && seq_num < start_win &&
594 seq_num >= tbl->init_win) {
595 mwifiex_dbg(priv->adapter, INFO,
596 "Sender TID sequence number reset %d->%d for SSN %d\n",
597 start_win, seq_num, tbl->init_win);
598 tbl->start_win = start_win = seq_num;
599 end_win = ((start_win + win_size) - 1) & (MAX_TID_VALUE - 1);
600 } else {
601 /*
602 * If seq_num is less then starting win then ignore and drop
603 * the packet
604 */
605 if ((start_win + TWOPOW11) > (MAX_TID_VALUE - 1)) {
606 if (seq_num >= ((start_win + TWOPOW11) &
607 (MAX_TID_VALUE - 1)) &&
608 seq_num < start_win) {
609 ret = -1;
610 goto done;
611 }
612 } else if ((seq_num < start_win) ||
613 (seq_num >= (start_win + TWOPOW11))) {
614 ret = -1;
615 goto done;
616 }
617 }
618
619 /*
620 * If this packet is a BAR we adjust seq_num as
621 * WinStart = seq_num
622 */
623 if (pkt_type == PKT_TYPE_BAR)
624 seq_num = ((seq_num + win_size) - 1) & (MAX_TID_VALUE - 1);
625
626 if (((end_win < start_win) &&
627 (seq_num < start_win) && (seq_num > end_win)) ||
628 ((end_win > start_win) && ((seq_num > end_win) ||
629 (seq_num < start_win)))) {
630 end_win = seq_num;
631 if (((end_win - win_size) + 1) >= 0)
632 start_win = (end_win - win_size) + 1;
633 else
634 start_win = (MAX_TID_VALUE - (win_size - end_win)) + 1;
635 mwifiex_11n_dispatch_pkt_until_start_win(priv, tbl, start_win);
636 }
637
638 if (pkt_type != PKT_TYPE_BAR) {
639 if (seq_num >= start_win)
640 pkt_index = seq_num - start_win;
641 else
642 pkt_index = (seq_num+MAX_TID_VALUE) - start_win;
643
644 if (tbl->rx_reorder_ptr[pkt_index]) {
645 ret = -1;
646 goto done;
647 }
648
649 tbl->rx_reorder_ptr[pkt_index] = payload;
650 }
651
652 /*
653 * Dispatch all packets sequentially from start_win until a
654 * hole is found and adjust the start_win appropriately
655 */
656 mwifiex_11n_scan_and_dispatch(priv, tbl);
657
658 done:
659 if (!tbl->timer_context.timer_is_set ||
660 prev_start_win != tbl->start_win)
661 mwifiex_11n_rxreorder_timer_restart(tbl);
662 return ret;
663 }
664
665 /*
666 * This function deletes an entry for a given TID/TA pair.
667 *
668 * The TID/TA are taken from del BA event body.
669 */
670 void
671 mwifiex_del_ba_tbl(struct mwifiex_private *priv, int tid, u8 *peer_mac,
672 u8 type, int initiator)
673 {
674 struct mwifiex_rx_reorder_tbl *tbl;
675 struct mwifiex_tx_ba_stream_tbl *ptx_tbl;
676 struct mwifiex_ra_list_tbl *ra_list;
677 u8 cleanup_rx_reorder_tbl;
678 unsigned long flags;
679 int tid_down;
680
681 if (type == TYPE_DELBA_RECEIVE)
682 cleanup_rx_reorder_tbl = (initiator) ? true : false;
683 else
684 cleanup_rx_reorder_tbl = (initiator) ? false : true;
685
686 mwifiex_dbg(priv->adapter, EVENT, "event: DELBA: %pM tid=%d initiator=%d\n",
687 peer_mac, tid, initiator);
688
689 if (cleanup_rx_reorder_tbl) {
690 tbl = mwifiex_11n_get_rx_reorder_tbl(priv, tid,
691 peer_mac);
692 if (!tbl) {
693 mwifiex_dbg(priv->adapter, EVENT,
694 "event: TID, TA not found in table\n");
695 return;
696 }
697 mwifiex_del_rx_reorder_entry(priv, tbl);
698 } else {
699 ptx_tbl = mwifiex_get_ba_tbl(priv, tid, peer_mac);
700 if (!ptx_tbl) {
701 mwifiex_dbg(priv->adapter, EVENT,
702 "event: TID, RA not found in table\n");
703 return;
704 }
705
706 tid_down = mwifiex_wmm_downgrade_tid(priv, tid);
707 ra_list = mwifiex_wmm_get_ralist_node(priv, tid_down, peer_mac);
708 if (ra_list) {
709 ra_list->amsdu_in_ampdu = false;
710 ra_list->ba_status = BA_SETUP_NONE;
711 }
712 spin_lock_irqsave(&priv->tx_ba_stream_tbl_lock, flags);
713 mwifiex_11n_delete_tx_ba_stream_tbl_entry(priv, ptx_tbl);
714 spin_unlock_irqrestore(&priv->tx_ba_stream_tbl_lock, flags);
715 }
716 }
717
718 /*
719 * This function handles the command response of an add BA response.
720 *
721 * Handling includes changing the header fields into CPU format and
722 * creating the stream, provided the add BA is accepted.
723 */
724 int mwifiex_ret_11n_addba_resp(struct mwifiex_private *priv,
725 struct host_cmd_ds_command *resp)
726 {
727 struct host_cmd_ds_11n_addba_rsp *add_ba_rsp = &resp->params.add_ba_rsp;
728 int tid, win_size;
729 struct mwifiex_rx_reorder_tbl *tbl;
730 uint16_t block_ack_param_set;
731
732 block_ack_param_set = le16_to_cpu(add_ba_rsp->block_ack_param_set);
733
734 tid = (block_ack_param_set & IEEE80211_ADDBA_PARAM_TID_MASK)
735 >> BLOCKACKPARAM_TID_POS;
736 /*
737 * Check if we had rejected the ADDBA, if yes then do not create
738 * the stream
739 */
740 if (le16_to_cpu(add_ba_rsp->status_code) != BA_RESULT_SUCCESS) {
741 mwifiex_dbg(priv->adapter, ERROR, "ADDBA RSP: failed %pM tid=%d)\n",
742 add_ba_rsp->peer_mac_addr, tid);
743
744 tbl = mwifiex_11n_get_rx_reorder_tbl(priv, tid,
745 add_ba_rsp->peer_mac_addr);
746 if (tbl)
747 mwifiex_del_rx_reorder_entry(priv, tbl);
748
749 return 0;
750 }
751
752 win_size = (block_ack_param_set & IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK)
753 >> BLOCKACKPARAM_WINSIZE_POS;
754
755 tbl = mwifiex_11n_get_rx_reorder_tbl(priv, tid,
756 add_ba_rsp->peer_mac_addr);
757 if (tbl) {
758 if ((block_ack_param_set & BLOCKACKPARAM_AMSDU_SUPP_MASK) &&
759 priv->add_ba_param.rx_amsdu &&
760 (priv->aggr_prio_tbl[tid].amsdu != BA_STREAM_NOT_ALLOWED))
761 tbl->amsdu = true;
762 else
763 tbl->amsdu = false;
764 }
765
766 mwifiex_dbg(priv->adapter, CMD,
767 "cmd: ADDBA RSP: %pM tid=%d ssn=%d win_size=%d\n",
768 add_ba_rsp->peer_mac_addr, tid, add_ba_rsp->ssn, win_size);
769
770 return 0;
771 }
772
773 /*
774 * This function handles BA stream timeout event by preparing and sending
775 * a command to the firmware.
776 */
777 void mwifiex_11n_ba_stream_timeout(struct mwifiex_private *priv,
778 struct host_cmd_ds_11n_batimeout *event)
779 {
780 struct host_cmd_ds_11n_delba delba;
781
782 memset(&delba, 0, sizeof(struct host_cmd_ds_11n_delba));
783 memcpy(delba.peer_mac_addr, event->peer_mac_addr, ETH_ALEN);
784
785 delba.del_ba_param_set |=
786 cpu_to_le16((u16) event->tid << DELBA_TID_POS);
787 delba.del_ba_param_set |= cpu_to_le16(
788 (u16) event->origninator << DELBA_INITIATOR_POS);
789 delba.reason_code = cpu_to_le16(WLAN_REASON_QSTA_TIMEOUT);
790 mwifiex_send_cmd(priv, HostCmd_CMD_11N_DELBA, 0, 0, &delba, false);
791 }
792
793 /*
794 * This function cleans up the Rx reorder table by deleting all the entries
795 * and re-initializing.
796 */
797 void mwifiex_11n_cleanup_reorder_tbl(struct mwifiex_private *priv)
798 {
799 struct mwifiex_rx_reorder_tbl *del_tbl_ptr, *tmp_node;
800 unsigned long flags;
801
802 spin_lock_irqsave(&priv->rx_reorder_tbl_lock, flags);
803 list_for_each_entry_safe(del_tbl_ptr, tmp_node,
804 &priv->rx_reorder_tbl_ptr, list) {
805 spin_unlock_irqrestore(&priv->rx_reorder_tbl_lock, flags);
806 mwifiex_del_rx_reorder_entry(priv, del_tbl_ptr);
807 spin_lock_irqsave(&priv->rx_reorder_tbl_lock, flags);
808 }
809 INIT_LIST_HEAD(&priv->rx_reorder_tbl_ptr);
810 spin_unlock_irqrestore(&priv->rx_reorder_tbl_lock, flags);
811
812 mwifiex_reset_11n_rx_seq_num(priv);
813 }
814
815 /*
816 * This function updates all rx_reorder_tbl's flags.
817 */
818 void mwifiex_update_rxreor_flags(struct mwifiex_adapter *adapter, u8 flags)
819 {
820 struct mwifiex_private *priv;
821 struct mwifiex_rx_reorder_tbl *tbl;
822 unsigned long lock_flags;
823 int i;
824
825 for (i = 0; i < adapter->priv_num; i++) {
826 priv = adapter->priv[i];
827 if (!priv)
828 continue;
829
830 spin_lock_irqsave(&priv->rx_reorder_tbl_lock, lock_flags);
831 if (list_empty(&priv->rx_reorder_tbl_ptr)) {
832 spin_unlock_irqrestore(&priv->rx_reorder_tbl_lock,
833 lock_flags);
834 continue;
835 }
836
837 list_for_each_entry(tbl, &priv->rx_reorder_tbl_ptr, list)
838 tbl->flags = flags;
839 spin_unlock_irqrestore(&priv->rx_reorder_tbl_lock, lock_flags);
840 }
841
842 return;
843 }
844
845 /* This function update all the rx_win_size based on coex flag
846 */
847 static void mwifiex_update_ampdu_rxwinsize(struct mwifiex_adapter *adapter,
848 bool coex_flag)
849 {
850 u8 i;
851 u32 rx_win_size;
852 struct mwifiex_private *priv;
853
854 dev_dbg(adapter->dev, "Update rxwinsize %d\n", coex_flag);
855
856 for (i = 0; i < adapter->priv_num; i++) {
857 if (!adapter->priv[i])
858 continue;
859 priv = adapter->priv[i];
860 rx_win_size = priv->add_ba_param.rx_win_size;
861 if (coex_flag) {
862 if (priv->bss_type == MWIFIEX_BSS_TYPE_STA)
863 priv->add_ba_param.rx_win_size =
864 MWIFIEX_STA_COEX_AMPDU_DEF_RXWINSIZE;
865 if (priv->bss_type == MWIFIEX_BSS_TYPE_P2P)
866 priv->add_ba_param.rx_win_size =
867 MWIFIEX_STA_COEX_AMPDU_DEF_RXWINSIZE;
868 if (priv->bss_type == MWIFIEX_BSS_TYPE_UAP)
869 priv->add_ba_param.rx_win_size =
870 MWIFIEX_UAP_COEX_AMPDU_DEF_RXWINSIZE;
871 } else {
872 if (priv->bss_type == MWIFIEX_BSS_TYPE_STA)
873 priv->add_ba_param.rx_win_size =
874 MWIFIEX_STA_AMPDU_DEF_RXWINSIZE;
875 if (priv->bss_type == MWIFIEX_BSS_TYPE_P2P)
876 priv->add_ba_param.rx_win_size =
877 MWIFIEX_STA_AMPDU_DEF_RXWINSIZE;
878 if (priv->bss_type == MWIFIEX_BSS_TYPE_UAP)
879 priv->add_ba_param.rx_win_size =
880 MWIFIEX_UAP_AMPDU_DEF_RXWINSIZE;
881 }
882
883 if (adapter->coex_win_size && adapter->coex_rx_win_size)
884 priv->add_ba_param.rx_win_size =
885 adapter->coex_rx_win_size;
886
887 if (rx_win_size != priv->add_ba_param.rx_win_size) {
888 if (!priv->media_connected)
889 continue;
890 for (i = 0; i < MAX_NUM_TID; i++)
891 mwifiex_11n_delba(priv, i);
892 }
893 }
894 }
895
896 /* This function check coex for RX BA
897 */
898 void mwifiex_coex_ampdu_rxwinsize(struct mwifiex_adapter *adapter)
899 {
900 u8 i;
901 struct mwifiex_private *priv;
902 u8 count = 0;
903
904 for (i = 0; i < adapter->priv_num; i++) {
905 if (adapter->priv[i]) {
906 priv = adapter->priv[i];
907 if (GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_STA) {
908 if (priv->media_connected)
909 count++;
910 }
911 if (GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_UAP) {
912 if (priv->bss_started)
913 count++;
914 }
915 }
916 if (count >= MWIFIEX_BSS_COEX_COUNT)
917 break;
918 }
919 if (count >= MWIFIEX_BSS_COEX_COUNT)
920 mwifiex_update_ampdu_rxwinsize(adapter, true);
921 else
922 mwifiex_update_ampdu_rxwinsize(adapter, false);
923 }
Linux kernel - Deliverables
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