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Linux 4.16.11
[linux/fpc-iii.git] / drivers / net / wireless / marvell / mwifiex / 11n_rxreorder.c
blob1edcddaf7b4b61455d29dc6a1cad2bacf85dc08b
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, NULL, NULL);
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
82 int ret;
83
84 if (!payload) {
85 mwifiex_dbg(priv->adapter, INFO, "info: fw drop data\n");
86 return 0;
87 }
88
89 ret = mwifiex_11n_dispatch_amsdu_pkt(priv, payload);
90 if (!ret)
91 return 0;
92
93 if (priv->bss_role == MWIFIEX_BSS_ROLE_UAP)
94 return mwifiex_handle_uap_rx_forward(priv, payload);
95
96 return mwifiex_process_rx_packet(priv, payload);
97 }
98
99 /*
100 * This function dispatches all packets in the Rx reorder table until the
101 * start window.
102 *
103 * There could be holes in the buffer, which are skipped by the function.
104 * Since the buffer is linear, the function uses rotation to simulate
105 * circular buffer.
106 */
107 static void
108 mwifiex_11n_dispatch_pkt_until_start_win(struct mwifiex_private *priv,
109 struct mwifiex_rx_reorder_tbl *tbl,
110 int start_win)
111 {
112 int pkt_to_send, i;
113 void *rx_tmp_ptr;
114 unsigned long flags;
115
116 pkt_to_send = (start_win > tbl->start_win) ?
117 min((start_win - tbl->start_win), tbl->win_size) :
118 tbl->win_size;
119
120 for (i = 0; i < pkt_to_send; ++i) {
121 spin_lock_irqsave(&priv->rx_pkt_lock, flags);
122 rx_tmp_ptr = NULL;
123 if (tbl->rx_reorder_ptr[i]) {
124 rx_tmp_ptr = tbl->rx_reorder_ptr[i];
125 tbl->rx_reorder_ptr[i] = NULL;
126 }
127 spin_unlock_irqrestore(&priv->rx_pkt_lock, flags);
128 if (rx_tmp_ptr)
129 mwifiex_11n_dispatch_pkt(priv, rx_tmp_ptr);
130 }
131
132 spin_lock_irqsave(&priv->rx_pkt_lock, flags);
133 /*
134 * We don't have a circular buffer, hence use rotation to simulate
135 * circular buffer
136 */
137 for (i = 0; i < tbl->win_size - pkt_to_send; ++i) {
138 tbl->rx_reorder_ptr[i] = tbl->rx_reorder_ptr[pkt_to_send + i];
139 tbl->rx_reorder_ptr[pkt_to_send + i] = NULL;
140 }
141
142 tbl->start_win = start_win;
143 spin_unlock_irqrestore(&priv->rx_pkt_lock, flags);
144 }
145
146 /*
147 * This function dispatches all packets in the Rx reorder table until
148 * a hole is found.
149 *
150 * The start window is adjusted automatically when a hole is located.
151 * Since the buffer is linear, the function uses rotation to simulate
152 * circular buffer.
153 */
154 static void
155 mwifiex_11n_scan_and_dispatch(struct mwifiex_private *priv,
156 struct mwifiex_rx_reorder_tbl *tbl)
157 {
158 int i, j, xchg;
159 void *rx_tmp_ptr;
160 unsigned long flags;
161
162 for (i = 0; i < tbl->win_size; ++i) {
163 spin_lock_irqsave(&priv->rx_pkt_lock, flags);
164 if (!tbl->rx_reorder_ptr[i]) {
165 spin_unlock_irqrestore(&priv->rx_pkt_lock, flags);
166 break;
167 }
168 rx_tmp_ptr = tbl->rx_reorder_ptr[i];
169 tbl->rx_reorder_ptr[i] = NULL;
170 spin_unlock_irqrestore(&priv->rx_pkt_lock, flags);
171 mwifiex_11n_dispatch_pkt(priv, rx_tmp_ptr);
172 }
173
174 spin_lock_irqsave(&priv->rx_pkt_lock, flags);
175 /*
176 * We don't have a circular buffer, hence use rotation to simulate
177 * circular buffer
178 */
179 if (i > 0) {
180 xchg = tbl->win_size - i;
181 for (j = 0; j < xchg; ++j) {
182 tbl->rx_reorder_ptr[j] = tbl->rx_reorder_ptr[i + j];
183 tbl->rx_reorder_ptr[i + j] = NULL;
184 }
185 }
186 tbl->start_win = (tbl->start_win + i) & (MAX_TID_VALUE - 1);
187 spin_unlock_irqrestore(&priv->rx_pkt_lock, flags);
188 }
189
190 /*
191 * This function deletes the Rx reorder table and frees the memory.
192 *
193 * The function stops the associated timer and dispatches all the
194 * pending packets in the Rx reorder table before deletion.
195 */
196 static void
197 mwifiex_del_rx_reorder_entry(struct mwifiex_private *priv,
198 struct mwifiex_rx_reorder_tbl *tbl)
199 {
200 unsigned long flags;
201 int start_win;
202
203 if (!tbl)
204 return;
205
206 spin_lock_irqsave(&priv->adapter->rx_proc_lock, flags);
207 priv->adapter->rx_locked = true;
208 if (priv->adapter->rx_processing) {
209 spin_unlock_irqrestore(&priv->adapter->rx_proc_lock, flags);
210 flush_workqueue(priv->adapter->rx_workqueue);
211 } else {
212 spin_unlock_irqrestore(&priv->adapter->rx_proc_lock, flags);
213 }
214
215 start_win = (tbl->start_win + tbl->win_size) & (MAX_TID_VALUE - 1);
216 mwifiex_11n_dispatch_pkt_until_start_win(priv, tbl, start_win);
217
218 del_timer_sync(&tbl->timer_context.timer);
219 tbl->timer_context.timer_is_set = false;
220
221 spin_lock_irqsave(&priv->rx_reorder_tbl_lock, flags);
222 list_del(&tbl->list);
223 spin_unlock_irqrestore(&priv->rx_reorder_tbl_lock, flags);
224
225 kfree(tbl->rx_reorder_ptr);
226 kfree(tbl);
227
228 spin_lock_irqsave(&priv->adapter->rx_proc_lock, flags);
229 priv->adapter->rx_locked = false;
230 spin_unlock_irqrestore(&priv->adapter->rx_proc_lock, flags);
231
232 }
233
234 /*
235 * This function returns the pointer to an entry in Rx reordering
236 * table which matches the given TA/TID pair.
237 */
238 struct mwifiex_rx_reorder_tbl *
239 mwifiex_11n_get_rx_reorder_tbl(struct mwifiex_private *priv, int tid, u8 *ta)
240 {
241 struct mwifiex_rx_reorder_tbl *tbl;
242 unsigned long flags;
243
244 spin_lock_irqsave(&priv->rx_reorder_tbl_lock, flags);
245 list_for_each_entry(tbl, &priv->rx_reorder_tbl_ptr, list) {
246 if (!memcmp(tbl->ta, ta, ETH_ALEN) && tbl->tid == tid) {
247 spin_unlock_irqrestore(&priv->rx_reorder_tbl_lock,
248 flags);
249 return tbl;
250 }
251 }
252 spin_unlock_irqrestore(&priv->rx_reorder_tbl_lock, flags);
253
254 return NULL;
255 }
256
257 /* This function retrieves the pointer to an entry in Rx reordering
258 * table which matches the given TA and deletes it.
259 */
260 void mwifiex_11n_del_rx_reorder_tbl_by_ta(struct mwifiex_private *priv, u8 *ta)
261 {
262 struct mwifiex_rx_reorder_tbl *tbl, *tmp;
263 unsigned long flags;
264
265 if (!ta)
266 return;
267
268 spin_lock_irqsave(&priv->rx_reorder_tbl_lock, flags);
269 list_for_each_entry_safe(tbl, tmp, &priv->rx_reorder_tbl_ptr, list) {
270 if (!memcmp(tbl->ta, ta, ETH_ALEN)) {
271 spin_unlock_irqrestore(&priv->rx_reorder_tbl_lock,
272 flags);
273 mwifiex_del_rx_reorder_entry(priv, tbl);
274 spin_lock_irqsave(&priv->rx_reorder_tbl_lock, flags);
275 }
276 }
277 spin_unlock_irqrestore(&priv->rx_reorder_tbl_lock, flags);
278
279 return;
280 }
281
282 /*
283 * This function finds the last sequence number used in the packets
284 * buffered in Rx reordering table.
285 */
286 static int
287 mwifiex_11n_find_last_seq_num(struct reorder_tmr_cnxt *ctx)
288 {
289 struct mwifiex_rx_reorder_tbl *rx_reorder_tbl_ptr = ctx->ptr;
290 struct mwifiex_private *priv = ctx->priv;
291 unsigned long flags;
292 int i;
293
294 spin_lock_irqsave(&priv->rx_reorder_tbl_lock, flags);
295 for (i = rx_reorder_tbl_ptr->win_size - 1; i >= 0; --i) {
296 if (rx_reorder_tbl_ptr->rx_reorder_ptr[i]) {
297 spin_unlock_irqrestore(&priv->rx_reorder_tbl_lock,
298 flags);
299 return i;
300 }
301 }
302 spin_unlock_irqrestore(&priv->rx_reorder_tbl_lock, flags);
303
304 return -1;
305 }
306
307 /*
308 * This function flushes all the packets in Rx reordering table.
309 *
310 * The function checks if any packets are currently buffered in the
311 * table or not. In case there are packets available, it dispatches
312 * them and then dumps the Rx reordering table.
313 */
314 static void
315 mwifiex_flush_data(struct timer_list *t)
316 {
317 struct reorder_tmr_cnxt *ctx =
318 from_timer(ctx, t, timer);
319 int start_win, seq_num;
320
321 ctx->timer_is_set = false;
322 seq_num = mwifiex_11n_find_last_seq_num(ctx);
323
324 if (seq_num < 0)
325 return;
326
327 mwifiex_dbg(ctx->priv->adapter, INFO, "info: flush data %d\n", seq_num);
328 start_win = (ctx->ptr->start_win + seq_num + 1) & (MAX_TID_VALUE - 1);
329 mwifiex_11n_dispatch_pkt_until_start_win(ctx->priv, ctx->ptr,
330 start_win);
331 }
332
333 /*
334 * This function creates an entry in Rx reordering table for the
335 * given TA/TID.
336 *
337 * The function also initializes the entry with sequence number, window
338 * size as well as initializes the timer.
339 *
340 * If the received TA/TID pair is already present, all the packets are
341 * dispatched and the window size is moved until the SSN.
342 */
343 static void
344 mwifiex_11n_create_rx_reorder_tbl(struct mwifiex_private *priv, u8 *ta,
345 int tid, int win_size, int seq_num)
346 {
347 int i;
348 struct mwifiex_rx_reorder_tbl *tbl, *new_node;
349 u16 last_seq = 0;
350 unsigned long flags;
351 struct mwifiex_sta_node *node;
352
353 /*
354 * If we get a TID, ta pair which is already present dispatch all the
355 * the packets and move the window size until the ssn
356 */
357 tbl = mwifiex_11n_get_rx_reorder_tbl(priv, tid, ta);
358 if (tbl) {
359 mwifiex_11n_dispatch_pkt_until_start_win(priv, tbl, seq_num);
360 return;
361 }
362 /* if !tbl then create one */
363 new_node = kzalloc(sizeof(struct mwifiex_rx_reorder_tbl), GFP_KERNEL);
364 if (!new_node)
365 return;
366
367 INIT_LIST_HEAD(&new_node->list);
368 new_node->tid = tid;
369 memcpy(new_node->ta, ta, ETH_ALEN);
370 new_node->start_win = seq_num;
371 new_node->init_win = seq_num;
372 new_node->flags = 0;
373
374 spin_lock_irqsave(&priv->sta_list_spinlock, flags);
375 if (mwifiex_queuing_ra_based(priv)) {
376 if (priv->bss_role == MWIFIEX_BSS_ROLE_UAP) {
377 node = mwifiex_get_sta_entry(priv, ta);
378 if (node)
379 last_seq = node->rx_seq[tid];
380 }
381 } else {
382 node = mwifiex_get_sta_entry(priv, ta);
383 if (node)
384 last_seq = node->rx_seq[tid];
385 else
386 last_seq = priv->rx_seq[tid];
387 }
388 spin_unlock_irqrestore(&priv->sta_list_spinlock, flags);
389
390 mwifiex_dbg(priv->adapter, INFO,
391 "info: last_seq=%d start_win=%d\n",
392 last_seq, new_node->start_win);
393
394 if (last_seq != MWIFIEX_DEF_11N_RX_SEQ_NUM &&
395 last_seq >= new_node->start_win) {
396 new_node->start_win = last_seq + 1;
397 new_node->flags |= RXREOR_INIT_WINDOW_SHIFT;
398 }
399
400 new_node->win_size = win_size;
401
402 new_node->rx_reorder_ptr = kzalloc(sizeof(void *) * win_size,
403 GFP_KERNEL);
404 if (!new_node->rx_reorder_ptr) {
405 kfree((u8 *) new_node);
406 mwifiex_dbg(priv->adapter, ERROR,
407 "%s: failed to alloc reorder_ptr\n", __func__);
408 return;
409 }
410
411 new_node->timer_context.ptr = new_node;
412 new_node->timer_context.priv = priv;
413 new_node->timer_context.timer_is_set = false;
414
415 timer_setup(&new_node->timer_context.timer, mwifiex_flush_data, 0);
416
417 for (i = 0; i < win_size; ++i)
418 new_node->rx_reorder_ptr[i] = NULL;
419
420 spin_lock_irqsave(&priv->rx_reorder_tbl_lock, flags);
421 list_add_tail(&new_node->list, &priv->rx_reorder_tbl_ptr);
422 spin_unlock_irqrestore(&priv->rx_reorder_tbl_lock, flags);
423 }
424
425 static void
426 mwifiex_11n_rxreorder_timer_restart(struct mwifiex_rx_reorder_tbl *tbl)
427 {
428 u32 min_flush_time;
429
430 if (tbl->win_size >= MWIFIEX_BA_WIN_SIZE_32)
431 min_flush_time = MIN_FLUSH_TIMER_15_MS;
432 else
433 min_flush_time = MIN_FLUSH_TIMER_MS;
434
435 mod_timer(&tbl->timer_context.timer,
436 jiffies + msecs_to_jiffies(min_flush_time * tbl->win_size));
437
438 tbl->timer_context.timer_is_set = true;
439 }
440
441 /*
442 * This function prepares command for adding a BA request.
443 *
444 * Preparation includes -
445 * - Setting command ID and proper size
446 * - Setting add BA request buffer
447 * - Ensuring correct endian-ness
448 */
449 int mwifiex_cmd_11n_addba_req(struct host_cmd_ds_command *cmd, void *data_buf)
450 {
451 struct host_cmd_ds_11n_addba_req *add_ba_req = &cmd->params.add_ba_req;
452
453 cmd->command = cpu_to_le16(HostCmd_CMD_11N_ADDBA_REQ);
454 cmd->size = cpu_to_le16(sizeof(*add_ba_req) + S_DS_GEN);
455 memcpy(add_ba_req, data_buf, sizeof(*add_ba_req));
456
457 return 0;
458 }
459
460 /*
461 * This function prepares command for adding a BA response.
462 *
463 * Preparation includes -
464 * - Setting command ID and proper size
465 * - Setting add BA response buffer
466 * - Ensuring correct endian-ness
467 */
468 int mwifiex_cmd_11n_addba_rsp_gen(struct mwifiex_private *priv,
469 struct host_cmd_ds_command *cmd,
470 struct host_cmd_ds_11n_addba_req
471 *cmd_addba_req)
472 {
473 struct host_cmd_ds_11n_addba_rsp *add_ba_rsp = &cmd->params.add_ba_rsp;
474 struct mwifiex_sta_node *sta_ptr;
475 u32 rx_win_size = priv->add_ba_param.rx_win_size;
476 u8 tid;
477 int win_size;
478 unsigned long flags;
479 uint16_t block_ack_param_set;
480
481 if ((GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_STA) &&
482 ISSUPP_TDLS_ENABLED(priv->adapter->fw_cap_info) &&
483 priv->adapter->is_hw_11ac_capable &&
484 memcmp(priv->cfg_bssid, cmd_addba_req->peer_mac_addr, ETH_ALEN)) {
485 spin_lock_irqsave(&priv->sta_list_spinlock, flags);
486 sta_ptr = mwifiex_get_sta_entry(priv,
487 cmd_addba_req->peer_mac_addr);
488 if (!sta_ptr) {
489 spin_unlock_irqrestore(&priv->sta_list_spinlock, flags);
490 mwifiex_dbg(priv->adapter, ERROR,
491 "BA setup with unknown TDLS peer %pM!\n",
492 cmd_addba_req->peer_mac_addr);
493 return -1;
494 }
495 if (sta_ptr->is_11ac_enabled)
496 rx_win_size = MWIFIEX_11AC_STA_AMPDU_DEF_RXWINSIZE;
497 spin_unlock_irqrestore(&priv->sta_list_spinlock, flags);
498 }
499
500 cmd->command = cpu_to_le16(HostCmd_CMD_11N_ADDBA_RSP);
501 cmd->size = cpu_to_le16(sizeof(*add_ba_rsp) + S_DS_GEN);
502
503 memcpy(add_ba_rsp->peer_mac_addr, cmd_addba_req->peer_mac_addr,
504 ETH_ALEN);
505 add_ba_rsp->dialog_token = cmd_addba_req->dialog_token;
506 add_ba_rsp->block_ack_tmo = cmd_addba_req->block_ack_tmo;
507 add_ba_rsp->ssn = cmd_addba_req->ssn;
508
509 block_ack_param_set = le16_to_cpu(cmd_addba_req->block_ack_param_set);
510 tid = (block_ack_param_set & IEEE80211_ADDBA_PARAM_TID_MASK)
511 >> BLOCKACKPARAM_TID_POS;
512 add_ba_rsp->status_code = cpu_to_le16(ADDBA_RSP_STATUS_ACCEPT);
513 block_ack_param_set &= ~IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK;
514
515 /* If we don't support AMSDU inside AMPDU, reset the bit */
516 if (!priv->add_ba_param.rx_amsdu ||
517 (priv->aggr_prio_tbl[tid].amsdu == BA_STREAM_NOT_ALLOWED))
518 block_ack_param_set &= ~BLOCKACKPARAM_AMSDU_SUPP_MASK;
519 block_ack_param_set |= rx_win_size << BLOCKACKPARAM_WINSIZE_POS;
520 add_ba_rsp->block_ack_param_set = cpu_to_le16(block_ack_param_set);
521 win_size = (le16_to_cpu(add_ba_rsp->block_ack_param_set)
522 & IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK)
523 >> BLOCKACKPARAM_WINSIZE_POS;
524 cmd_addba_req->block_ack_param_set = cpu_to_le16(block_ack_param_set);
525
526 mwifiex_11n_create_rx_reorder_tbl(priv, cmd_addba_req->peer_mac_addr,
527 tid, win_size,
528 le16_to_cpu(cmd_addba_req->ssn));
529 return 0;
530 }
531
532 /*
533 * This function prepares command for deleting a BA request.
534 *
535 * Preparation includes -
536 * - Setting command ID and proper size
537 * - Setting del BA request buffer
538 * - Ensuring correct endian-ness
539 */
540 int mwifiex_cmd_11n_delba(struct host_cmd_ds_command *cmd, void *data_buf)
541 {
542 struct host_cmd_ds_11n_delba *del_ba = &cmd->params.del_ba;
543
544 cmd->command = cpu_to_le16(HostCmd_CMD_11N_DELBA);
545 cmd->size = cpu_to_le16(sizeof(*del_ba) + S_DS_GEN);
546 memcpy(del_ba, data_buf, sizeof(*del_ba));
547
548 return 0;
549 }
550
551 /*
552 * This function identifies if Rx reordering is needed for a received packet.
553 *
554 * In case reordering is required, the function will do the reordering
555 * before sending it to kernel.
556 *
557 * The Rx reorder table is checked first with the received TID/TA pair. If
558 * not found, the received packet is dispatched immediately. But if found,
559 * the packet is reordered and all the packets in the updated Rx reordering
560 * table is dispatched until a hole is found.
561 *
562 * For sequence number less than the starting window, the packet is dropped.
563 */
564 int mwifiex_11n_rx_reorder_pkt(struct mwifiex_private *priv,
565 u16 seq_num, u16 tid,
566 u8 *ta, u8 pkt_type, void *payload)
567 {
568 struct mwifiex_rx_reorder_tbl *tbl;
569 int prev_start_win, start_win, end_win, win_size;
570 u16 pkt_index;
571 bool init_window_shift = false;
572 int ret = 0;
573
574 tbl = mwifiex_11n_get_rx_reorder_tbl(priv, tid, ta);
575 if (!tbl) {
576 if (pkt_type != PKT_TYPE_BAR)
577 mwifiex_11n_dispatch_pkt(priv, payload);
578 return ret;
579 }
580
581 if ((pkt_type == PKT_TYPE_AMSDU) && !tbl->amsdu) {
582 mwifiex_11n_dispatch_pkt(priv, payload);
583 return ret;
584 }
585
586 start_win = tbl->start_win;
587 prev_start_win = start_win;
588 win_size = tbl->win_size;
589 end_win = ((start_win + win_size) - 1) & (MAX_TID_VALUE - 1);
590 if (tbl->flags & RXREOR_INIT_WINDOW_SHIFT) {
591 init_window_shift = true;
592 tbl->flags &= ~RXREOR_INIT_WINDOW_SHIFT;
593 }
594
595 if (tbl->flags & RXREOR_FORCE_NO_DROP) {
596 mwifiex_dbg(priv->adapter, INFO,
597 "RXREOR_FORCE_NO_DROP when HS is activated\n");
598 tbl->flags &= ~RXREOR_FORCE_NO_DROP;
599 } else if (init_window_shift && seq_num < start_win &&
600 seq_num >= tbl->init_win) {
601 mwifiex_dbg(priv->adapter, INFO,
602 "Sender TID sequence number reset %d->%d for SSN %d\n",
603 start_win, seq_num, tbl->init_win);
604 tbl->start_win = start_win = seq_num;
605 end_win = ((start_win + win_size) - 1) & (MAX_TID_VALUE - 1);
606 } else {
607 /*
608 * If seq_num is less then starting win then ignore and drop
609 * the packet
610 */
611 if ((start_win + TWOPOW11) > (MAX_TID_VALUE - 1)) {
612 if (seq_num >= ((start_win + TWOPOW11) &
613 (MAX_TID_VALUE - 1)) &&
614 seq_num < start_win) {
615 ret = -1;
616 goto done;
617 }
618 } else if ((seq_num < start_win) ||
619 (seq_num >= (start_win + TWOPOW11))) {
620 ret = -1;
621 goto done;
622 }
623 }
624
625 /*
626 * If this packet is a BAR we adjust seq_num as
627 * WinStart = seq_num
628 */
629 if (pkt_type == PKT_TYPE_BAR)
630 seq_num = ((seq_num + win_size) - 1) & (MAX_TID_VALUE - 1);
631
632 if (((end_win < start_win) &&
633 (seq_num < start_win) && (seq_num > end_win)) ||
634 ((end_win > start_win) && ((seq_num > end_win) ||
635 (seq_num < start_win)))) {
636 end_win = seq_num;
637 if (((end_win - win_size) + 1) >= 0)
638 start_win = (end_win - win_size) + 1;
639 else
640 start_win = (MAX_TID_VALUE - (win_size - end_win)) + 1;
641 mwifiex_11n_dispatch_pkt_until_start_win(priv, tbl, start_win);
642 }
643
644 if (pkt_type != PKT_TYPE_BAR) {
645 if (seq_num >= start_win)
646 pkt_index = seq_num - start_win;
647 else
648 pkt_index = (seq_num+MAX_TID_VALUE) - start_win;
649
650 if (tbl->rx_reorder_ptr[pkt_index]) {
651 ret = -1;
652 goto done;
653 }
654
655 tbl->rx_reorder_ptr[pkt_index] = payload;
656 }
657
658 /*
659 * Dispatch all packets sequentially from start_win until a
660 * hole is found and adjust the start_win appropriately
661 */
662 mwifiex_11n_scan_and_dispatch(priv, tbl);
663
664 done:
665 if (!tbl->timer_context.timer_is_set ||
666 prev_start_win != tbl->start_win)
667 mwifiex_11n_rxreorder_timer_restart(tbl);
668 return ret;
669 }
670
671 /*
672 * This function deletes an entry for a given TID/TA pair.
673 *
674 * The TID/TA are taken from del BA event body.
675 */
676 void
677 mwifiex_del_ba_tbl(struct mwifiex_private *priv, int tid, u8 *peer_mac,
678 u8 type, int initiator)
679 {
680 struct mwifiex_rx_reorder_tbl *tbl;
681 struct mwifiex_tx_ba_stream_tbl *ptx_tbl;
682 struct mwifiex_ra_list_tbl *ra_list;
683 u8 cleanup_rx_reorder_tbl;
684 unsigned long flags;
685 int tid_down;
686
687 if (type == TYPE_DELBA_RECEIVE)
688 cleanup_rx_reorder_tbl = (initiator) ? true : false;
689 else
690 cleanup_rx_reorder_tbl = (initiator) ? false : true;
691
692 mwifiex_dbg(priv->adapter, EVENT, "event: DELBA: %pM tid=%d initiator=%d\n",
693 peer_mac, tid, initiator);
694
695 if (cleanup_rx_reorder_tbl) {
696 tbl = mwifiex_11n_get_rx_reorder_tbl(priv, tid,
697 peer_mac);
698 if (!tbl) {
699 mwifiex_dbg(priv->adapter, EVENT,
700 "event: TID, TA not found in table\n");
701 return;
702 }
703 mwifiex_del_rx_reorder_entry(priv, tbl);
704 } else {
705 ptx_tbl = mwifiex_get_ba_tbl(priv, tid, peer_mac);
706 if (!ptx_tbl) {
707 mwifiex_dbg(priv->adapter, EVENT,
708 "event: TID, RA not found in table\n");
709 return;
710 }
711
712 tid_down = mwifiex_wmm_downgrade_tid(priv, tid);
713 ra_list = mwifiex_wmm_get_ralist_node(priv, tid_down, peer_mac);
714 if (ra_list) {
715 ra_list->amsdu_in_ampdu = false;
716 ra_list->ba_status = BA_SETUP_NONE;
717 }
718 spin_lock_irqsave(&priv->tx_ba_stream_tbl_lock, flags);
719 mwifiex_11n_delete_tx_ba_stream_tbl_entry(priv, ptx_tbl);
720 spin_unlock_irqrestore(&priv->tx_ba_stream_tbl_lock, flags);
721 }
722 }
723
724 /*
725 * This function handles the command response of an add BA response.
726 *
727 * Handling includes changing the header fields into CPU format and
728 * creating the stream, provided the add BA is accepted.
729 */
730 int mwifiex_ret_11n_addba_resp(struct mwifiex_private *priv,
731 struct host_cmd_ds_command *resp)
732 {
733 struct host_cmd_ds_11n_addba_rsp *add_ba_rsp = &resp->params.add_ba_rsp;
734 int tid, win_size;
735 struct mwifiex_rx_reorder_tbl *tbl;
736 uint16_t block_ack_param_set;
737
738 block_ack_param_set = le16_to_cpu(add_ba_rsp->block_ack_param_set);
739
740 tid = (block_ack_param_set & IEEE80211_ADDBA_PARAM_TID_MASK)
741 >> BLOCKACKPARAM_TID_POS;
742 /*
743 * Check if we had rejected the ADDBA, if yes then do not create
744 * the stream
745 */
746 if (le16_to_cpu(add_ba_rsp->status_code) != BA_RESULT_SUCCESS) {
747 mwifiex_dbg(priv->adapter, ERROR, "ADDBA RSP: failed %pM tid=%d)\n",
748 add_ba_rsp->peer_mac_addr, tid);
749
750 tbl = mwifiex_11n_get_rx_reorder_tbl(priv, tid,
751 add_ba_rsp->peer_mac_addr);
752 if (tbl)
753 mwifiex_del_rx_reorder_entry(priv, tbl);
754
755 return 0;
756 }
757
758 win_size = (block_ack_param_set & IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK)
759 >> BLOCKACKPARAM_WINSIZE_POS;
760
761 tbl = mwifiex_11n_get_rx_reorder_tbl(priv, tid,
762 add_ba_rsp->peer_mac_addr);
763 if (tbl) {
764 if ((block_ack_param_set & BLOCKACKPARAM_AMSDU_SUPP_MASK) &&
765 priv->add_ba_param.rx_amsdu &&
766 (priv->aggr_prio_tbl[tid].amsdu != BA_STREAM_NOT_ALLOWED))
767 tbl->amsdu = true;
768 else
769 tbl->amsdu = false;
770 }
771
772 mwifiex_dbg(priv->adapter, CMD,
773 "cmd: ADDBA RSP: %pM tid=%d ssn=%d win_size=%d\n",
774 add_ba_rsp->peer_mac_addr, tid, add_ba_rsp->ssn, win_size);
775
776 return 0;
777 }
778
779 /*
780 * This function handles BA stream timeout event by preparing and sending
781 * a command to the firmware.
782 */
783 void mwifiex_11n_ba_stream_timeout(struct mwifiex_private *priv,
784 struct host_cmd_ds_11n_batimeout *event)
785 {
786 struct host_cmd_ds_11n_delba delba;
787
788 memset(&delba, 0, sizeof(struct host_cmd_ds_11n_delba));
789 memcpy(delba.peer_mac_addr, event->peer_mac_addr, ETH_ALEN);
790
791 delba.del_ba_param_set |=
792 cpu_to_le16((u16) event->tid << DELBA_TID_POS);
793 delba.del_ba_param_set |= cpu_to_le16(
794 (u16) event->origninator << DELBA_INITIATOR_POS);
795 delba.reason_code = cpu_to_le16(WLAN_REASON_QSTA_TIMEOUT);
796 mwifiex_send_cmd(priv, HostCmd_CMD_11N_DELBA, 0, 0, &delba, false);
797 }
798
799 /*
800 * This function cleans up the Rx reorder table by deleting all the entries
801 * and re-initializing.
802 */
803 void mwifiex_11n_cleanup_reorder_tbl(struct mwifiex_private *priv)
804 {
805 struct mwifiex_rx_reorder_tbl *del_tbl_ptr, *tmp_node;
806 unsigned long flags;
807
808 spin_lock_irqsave(&priv->rx_reorder_tbl_lock, flags);
809 list_for_each_entry_safe(del_tbl_ptr, tmp_node,
810 &priv->rx_reorder_tbl_ptr, list) {
811 spin_unlock_irqrestore(&priv->rx_reorder_tbl_lock, flags);
812 mwifiex_del_rx_reorder_entry(priv, del_tbl_ptr);
813 spin_lock_irqsave(&priv->rx_reorder_tbl_lock, flags);
814 }
815 INIT_LIST_HEAD(&priv->rx_reorder_tbl_ptr);
816 spin_unlock_irqrestore(&priv->rx_reorder_tbl_lock, flags);
817
818 mwifiex_reset_11n_rx_seq_num(priv);
819 }
820
821 /*
822 * This function updates all rx_reorder_tbl's flags.
823 */
824 void mwifiex_update_rxreor_flags(struct mwifiex_adapter *adapter, u8 flags)
825 {
826 struct mwifiex_private *priv;
827 struct mwifiex_rx_reorder_tbl *tbl;
828 unsigned long lock_flags;
829 int i;
830
831 for (i = 0; i < adapter->priv_num; i++) {
832 priv = adapter->priv[i];
833 if (!priv)
834 continue;
835
836 spin_lock_irqsave(&priv->rx_reorder_tbl_lock, lock_flags);
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 }
924
925 /* This function handles rxba_sync event
926 */
927 void mwifiex_11n_rxba_sync_event(struct mwifiex_private *priv,
928 u8 *event_buf, u16 len)
929 {
930 struct mwifiex_ie_types_rxba_sync *tlv_rxba = (void *)event_buf;
931 u16 tlv_type, tlv_len;
932 struct mwifiex_rx_reorder_tbl *rx_reor_tbl_ptr;
933 u8 i, j;
934 u16 seq_num, tlv_seq_num, tlv_bitmap_len;
935 int tlv_buf_left = len;
936 int ret;
937 u8 *tmp;
938
939 mwifiex_dbg_dump(priv->adapter, EVT_D, "RXBA_SYNC event:",
940 event_buf, len);
941 while (tlv_buf_left >= sizeof(*tlv_rxba)) {
942 tlv_type = le16_to_cpu(tlv_rxba->header.type);
943 tlv_len = le16_to_cpu(tlv_rxba->header.len);
944 if (tlv_type != TLV_TYPE_RXBA_SYNC) {
945 mwifiex_dbg(priv->adapter, ERROR,
946 "Wrong TLV id=0x%x\n", tlv_type);
947 return;
948 }
949
950 tlv_seq_num = le16_to_cpu(tlv_rxba->seq_num);
951 tlv_bitmap_len = le16_to_cpu(tlv_rxba->bitmap_len);
952 mwifiex_dbg(priv->adapter, INFO,
953 "%pM tid=%d seq_num=%d bitmap_len=%d\n",
954 tlv_rxba->mac, tlv_rxba->tid, tlv_seq_num,
955 tlv_bitmap_len);
956
957 rx_reor_tbl_ptr =
958 mwifiex_11n_get_rx_reorder_tbl(priv, tlv_rxba->tid,
959 tlv_rxba->mac);
960 if (!rx_reor_tbl_ptr) {
961 mwifiex_dbg(priv->adapter, ERROR,
962 "Can not find rx_reorder_tbl!");
963 return;
964 }
965
966 for (i = 0; i < tlv_bitmap_len; i++) {
967 for (j = 0 ; j < 8; j++) {
968 if (tlv_rxba->bitmap[i] & (1 << j)) {
969 seq_num = (MAX_TID_VALUE - 1) &
970 (tlv_seq_num + i * 8 + j);
971
972 mwifiex_dbg(priv->adapter, ERROR,
973 "drop packet,seq=%d\n",
974 seq_num);
975
976 ret = mwifiex_11n_rx_reorder_pkt
977 (priv, seq_num, tlv_rxba->tid,
978 tlv_rxba->mac, 0, NULL);
979
980 if (ret)
981 mwifiex_dbg(priv->adapter,
982 ERROR,
983 "Fail to drop packet");
984 }
985 }
986 }
987
988 tlv_buf_left -= (sizeof(*tlv_rxba) + tlv_len);
989 tmp = (u8 *)tlv_rxba + tlv_len + sizeof(*tlv_rxba);
990 tlv_rxba = (struct mwifiex_ie_types_rxba_sync *)tmp;
991 }
992 }
Linux with added FPC-III support