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Merge tag 'chrome-platform-for-linus-4.13' of git://git.kernel.org/pub/scm/linux...
[linux/fpc-iii.git] / drivers / net / wireless / marvell / mwifiex / 11n_rxreorder.c
blob274dd5a1574a3f4a936637b60f6f78fca645bdbc
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(unsigned long context)
316 {
317 struct reorder_tmr_cnxt *ctx =
318 (struct reorder_tmr_cnxt *) context;
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 setup_timer(&new_node->timer_context.timer, mwifiex_flush_data,
416 (unsigned long)&new_node->timer_context);
417
418 for (i = 0; i < win_size; ++i)
419 new_node->rx_reorder_ptr[i] = NULL;
420
421 spin_lock_irqsave(&priv->rx_reorder_tbl_lock, flags);
422 list_add_tail(&new_node->list, &priv->rx_reorder_tbl_ptr);
423 spin_unlock_irqrestore(&priv->rx_reorder_tbl_lock, flags);
424 }
425
426 static void
427 mwifiex_11n_rxreorder_timer_restart(struct mwifiex_rx_reorder_tbl *tbl)
428 {
429 u32 min_flush_time;
430
431 if (tbl->win_size >= MWIFIEX_BA_WIN_SIZE_32)
432 min_flush_time = MIN_FLUSH_TIMER_15_MS;
433 else
434 min_flush_time = MIN_FLUSH_TIMER_MS;
435
436 mod_timer(&tbl->timer_context.timer,
437 jiffies + msecs_to_jiffies(min_flush_time * tbl->win_size));
438
439 tbl->timer_context.timer_is_set = true;
440 }
441
442 /*
443 * This function prepares command for adding a BA request.
444 *
445 * Preparation includes -
446 * - Setting command ID and proper size
447 * - Setting add BA request buffer
448 * - Ensuring correct endian-ness
449 */
450 int mwifiex_cmd_11n_addba_req(struct host_cmd_ds_command *cmd, void *data_buf)
451 {
452 struct host_cmd_ds_11n_addba_req *add_ba_req = &cmd->params.add_ba_req;
453
454 cmd->command = cpu_to_le16(HostCmd_CMD_11N_ADDBA_REQ);
455 cmd->size = cpu_to_le16(sizeof(*add_ba_req) + S_DS_GEN);
456 memcpy(add_ba_req, data_buf, sizeof(*add_ba_req));
457
458 return 0;
459 }
460
461 /*
462 * This function prepares command for adding a BA response.
463 *
464 * Preparation includes -
465 * - Setting command ID and proper size
466 * - Setting add BA response buffer
467 * - Ensuring correct endian-ness
468 */
469 int mwifiex_cmd_11n_addba_rsp_gen(struct mwifiex_private *priv,
470 struct host_cmd_ds_command *cmd,
471 struct host_cmd_ds_11n_addba_req
472 *cmd_addba_req)
473 {
474 struct host_cmd_ds_11n_addba_rsp *add_ba_rsp = &cmd->params.add_ba_rsp;
475 struct mwifiex_sta_node *sta_ptr;
476 u32 rx_win_size = priv->add_ba_param.rx_win_size;
477 u8 tid;
478 int win_size;
479 unsigned long flags;
480 uint16_t block_ack_param_set;
481
482 if ((GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_STA) &&
483 ISSUPP_TDLS_ENABLED(priv->adapter->fw_cap_info) &&
484 priv->adapter->is_hw_11ac_capable &&
485 memcmp(priv->cfg_bssid, cmd_addba_req->peer_mac_addr, ETH_ALEN)) {
486 spin_lock_irqsave(&priv->sta_list_spinlock, flags);
487 sta_ptr = mwifiex_get_sta_entry(priv,
488 cmd_addba_req->peer_mac_addr);
489 if (!sta_ptr) {
490 spin_unlock_irqrestore(&priv->sta_list_spinlock, flags);
491 mwifiex_dbg(priv->adapter, ERROR,
492 "BA setup with unknown TDLS peer %pM!\n",
493 cmd_addba_req->peer_mac_addr);
494 return -1;
495 }
496 if (sta_ptr->is_11ac_enabled)
497 rx_win_size = MWIFIEX_11AC_STA_AMPDU_DEF_RXWINSIZE;
498 spin_unlock_irqrestore(&priv->sta_list_spinlock, flags);
499 }
500
501 cmd->command = cpu_to_le16(HostCmd_CMD_11N_ADDBA_RSP);
502 cmd->size = cpu_to_le16(sizeof(*add_ba_rsp) + S_DS_GEN);
503
504 memcpy(add_ba_rsp->peer_mac_addr, cmd_addba_req->peer_mac_addr,
505 ETH_ALEN);
506 add_ba_rsp->dialog_token = cmd_addba_req->dialog_token;
507 add_ba_rsp->block_ack_tmo = cmd_addba_req->block_ack_tmo;
508 add_ba_rsp->ssn = cmd_addba_req->ssn;
509
510 block_ack_param_set = le16_to_cpu(cmd_addba_req->block_ack_param_set);
511 tid = (block_ack_param_set & IEEE80211_ADDBA_PARAM_TID_MASK)
512 >> BLOCKACKPARAM_TID_POS;
513 add_ba_rsp->status_code = cpu_to_le16(ADDBA_RSP_STATUS_ACCEPT);
514 block_ack_param_set &= ~IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK;
515
516 /* If we don't support AMSDU inside AMPDU, reset the bit */
517 if (!priv->add_ba_param.rx_amsdu ||
518 (priv->aggr_prio_tbl[tid].amsdu == BA_STREAM_NOT_ALLOWED))
519 block_ack_param_set &= ~BLOCKACKPARAM_AMSDU_SUPP_MASK;
520 block_ack_param_set |= rx_win_size << BLOCKACKPARAM_WINSIZE_POS;
521 add_ba_rsp->block_ack_param_set = cpu_to_le16(block_ack_param_set);
522 win_size = (le16_to_cpu(add_ba_rsp->block_ack_param_set)
523 & IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK)
524 >> BLOCKACKPARAM_WINSIZE_POS;
525 cmd_addba_req->block_ack_param_set = cpu_to_le16(block_ack_param_set);
526
527 mwifiex_11n_create_rx_reorder_tbl(priv, cmd_addba_req->peer_mac_addr,
528 tid, win_size,
529 le16_to_cpu(cmd_addba_req->ssn));
530 return 0;
531 }
532
533 /*
534 * This function prepares command for deleting a BA request.
535 *
536 * Preparation includes -
537 * - Setting command ID and proper size
538 * - Setting del BA request buffer
539 * - Ensuring correct endian-ness
540 */
541 int mwifiex_cmd_11n_delba(struct host_cmd_ds_command *cmd, void *data_buf)
542 {
543 struct host_cmd_ds_11n_delba *del_ba = &cmd->params.del_ba;
544
545 cmd->command = cpu_to_le16(HostCmd_CMD_11N_DELBA);
546 cmd->size = cpu_to_le16(sizeof(*del_ba) + S_DS_GEN);
547 memcpy(del_ba, data_buf, sizeof(*del_ba));
548
549 return 0;
550 }
551
552 /*
553 * This function identifies if Rx reordering is needed for a received packet.
554 *
555 * In case reordering is required, the function will do the reordering
556 * before sending it to kernel.
557 *
558 * The Rx reorder table is checked first with the received TID/TA pair. If
559 * not found, the received packet is dispatched immediately. But if found,
560 * the packet is reordered and all the packets in the updated Rx reordering
561 * table is dispatched until a hole is found.
562 *
563 * For sequence number less than the starting window, the packet is dropped.
564 */
565 int mwifiex_11n_rx_reorder_pkt(struct mwifiex_private *priv,
566 u16 seq_num, u16 tid,
567 u8 *ta, u8 pkt_type, void *payload)
568 {
569 struct mwifiex_rx_reorder_tbl *tbl;
570 int prev_start_win, start_win, end_win, win_size;
571 u16 pkt_index;
572 bool init_window_shift = false;
573 int ret = 0;
574
575 tbl = mwifiex_11n_get_rx_reorder_tbl(priv, tid, ta);
576 if (!tbl) {
577 if (pkt_type != PKT_TYPE_BAR)
578 mwifiex_11n_dispatch_pkt(priv, payload);
579 return ret;
580 }
581
582 if ((pkt_type == PKT_TYPE_AMSDU) && !tbl->amsdu) {
583 mwifiex_11n_dispatch_pkt(priv, payload);
584 return ret;
585 }
586
587 start_win = tbl->start_win;
588 prev_start_win = start_win;
589 win_size = tbl->win_size;
590 end_win = ((start_win + win_size) - 1) & (MAX_TID_VALUE - 1);
591 if (tbl->flags & RXREOR_INIT_WINDOW_SHIFT) {
592 init_window_shift = true;
593 tbl->flags &= ~RXREOR_INIT_WINDOW_SHIFT;
594 }
595
596 if (tbl->flags & RXREOR_FORCE_NO_DROP) {
597 mwifiex_dbg(priv->adapter, INFO,
598 "RXREOR_FORCE_NO_DROP when HS is activated\n");
599 tbl->flags &= ~RXREOR_FORCE_NO_DROP;
600 } else if (init_window_shift && seq_num < start_win &&
601 seq_num >= tbl->init_win) {
602 mwifiex_dbg(priv->adapter, INFO,
603 "Sender TID sequence number reset %d->%d for SSN %d\n",
604 start_win, seq_num, tbl->init_win);
605 tbl->start_win = start_win = seq_num;
606 end_win = ((start_win + win_size) - 1) & (MAX_TID_VALUE - 1);
607 } else {
608 /*
609 * If seq_num is less then starting win then ignore and drop
610 * the packet
611 */
612 if ((start_win + TWOPOW11) > (MAX_TID_VALUE - 1)) {
613 if (seq_num >= ((start_win + TWOPOW11) &
614 (MAX_TID_VALUE - 1)) &&
615 seq_num < start_win) {
616 ret = -1;
617 goto done;
618 }
619 } else if ((seq_num < start_win) ||
620 (seq_num >= (start_win + TWOPOW11))) {
621 ret = -1;
622 goto done;
623 }
624 }
625
626 /*
627 * If this packet is a BAR we adjust seq_num as
628 * WinStart = seq_num
629 */
630 if (pkt_type == PKT_TYPE_BAR)
631 seq_num = ((seq_num + win_size) - 1) & (MAX_TID_VALUE - 1);
632
633 if (((end_win < start_win) &&
634 (seq_num < start_win) && (seq_num > end_win)) ||
635 ((end_win > start_win) && ((seq_num > end_win) ||
636 (seq_num < start_win)))) {
637 end_win = seq_num;
638 if (((end_win - win_size) + 1) >= 0)
639 start_win = (end_win - win_size) + 1;
640 else
641 start_win = (MAX_TID_VALUE - (win_size - end_win)) + 1;
642 mwifiex_11n_dispatch_pkt_until_start_win(priv, tbl, start_win);
643 }
644
645 if (pkt_type != PKT_TYPE_BAR) {
646 if (seq_num >= start_win)
647 pkt_index = seq_num - start_win;
648 else
649 pkt_index = (seq_num+MAX_TID_VALUE) - start_win;
650
651 if (tbl->rx_reorder_ptr[pkt_index]) {
652 ret = -1;
653 goto done;
654 }
655
656 tbl->rx_reorder_ptr[pkt_index] = payload;
657 }
658
659 /*
660 * Dispatch all packets sequentially from start_win until a
661 * hole is found and adjust the start_win appropriately
662 */
663 mwifiex_11n_scan_and_dispatch(priv, tbl);
664
665 done:
666 if (!tbl->timer_context.timer_is_set ||
667 prev_start_win != tbl->start_win)
668 mwifiex_11n_rxreorder_timer_restart(tbl);
669 return ret;
670 }
671
672 /*
673 * This function deletes an entry for a given TID/TA pair.
674 *
675 * The TID/TA are taken from del BA event body.
676 */
677 void
678 mwifiex_del_ba_tbl(struct mwifiex_private *priv, int tid, u8 *peer_mac,
679 u8 type, int initiator)
680 {
681 struct mwifiex_rx_reorder_tbl *tbl;
682 struct mwifiex_tx_ba_stream_tbl *ptx_tbl;
683 struct mwifiex_ra_list_tbl *ra_list;
684 u8 cleanup_rx_reorder_tbl;
685 unsigned long flags;
686 int tid_down;
687
688 if (type == TYPE_DELBA_RECEIVE)
689 cleanup_rx_reorder_tbl = (initiator) ? true : false;
690 else
691 cleanup_rx_reorder_tbl = (initiator) ? false : true;
692
693 mwifiex_dbg(priv->adapter, EVENT, "event: DELBA: %pM tid=%d initiator=%d\n",
694 peer_mac, tid, initiator);
695
696 if (cleanup_rx_reorder_tbl) {
697 tbl = mwifiex_11n_get_rx_reorder_tbl(priv, tid,
698 peer_mac);
699 if (!tbl) {
700 mwifiex_dbg(priv->adapter, EVENT,
701 "event: TID, TA not found in table\n");
702 return;
703 }
704 mwifiex_del_rx_reorder_entry(priv, tbl);
705 } else {
706 ptx_tbl = mwifiex_get_ba_tbl(priv, tid, peer_mac);
707 if (!ptx_tbl) {
708 mwifiex_dbg(priv->adapter, EVENT,
709 "event: TID, RA not found in table\n");
710 return;
711 }
712
713 tid_down = mwifiex_wmm_downgrade_tid(priv, tid);
714 ra_list = mwifiex_wmm_get_ralist_node(priv, tid_down, peer_mac);
715 if (ra_list) {
716 ra_list->amsdu_in_ampdu = false;
717 ra_list->ba_status = BA_SETUP_NONE;
718 }
719 spin_lock_irqsave(&priv->tx_ba_stream_tbl_lock, flags);
720 mwifiex_11n_delete_tx_ba_stream_tbl_entry(priv, ptx_tbl);
721 spin_unlock_irqrestore(&priv->tx_ba_stream_tbl_lock, flags);
722 }
723 }
724
725 /*
726 * This function handles the command response of an add BA response.
727 *
728 * Handling includes changing the header fields into CPU format and
729 * creating the stream, provided the add BA is accepted.
730 */
731 int mwifiex_ret_11n_addba_resp(struct mwifiex_private *priv,
732 struct host_cmd_ds_command *resp)
733 {
734 struct host_cmd_ds_11n_addba_rsp *add_ba_rsp = &resp->params.add_ba_rsp;
735 int tid, win_size;
736 struct mwifiex_rx_reorder_tbl *tbl;
737 uint16_t block_ack_param_set;
738
739 block_ack_param_set = le16_to_cpu(add_ba_rsp->block_ack_param_set);
740
741 tid = (block_ack_param_set & IEEE80211_ADDBA_PARAM_TID_MASK)
742 >> BLOCKACKPARAM_TID_POS;
743 /*
744 * Check if we had rejected the ADDBA, if yes then do not create
745 * the stream
746 */
747 if (le16_to_cpu(add_ba_rsp->status_code) != BA_RESULT_SUCCESS) {
748 mwifiex_dbg(priv->adapter, ERROR, "ADDBA RSP: failed %pM tid=%d)\n",
749 add_ba_rsp->peer_mac_addr, tid);
750
751 tbl = mwifiex_11n_get_rx_reorder_tbl(priv, tid,
752 add_ba_rsp->peer_mac_addr);
753 if (tbl)
754 mwifiex_del_rx_reorder_entry(priv, tbl);
755
756 return 0;
757 }
758
759 win_size = (block_ack_param_set & IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK)
760 >> BLOCKACKPARAM_WINSIZE_POS;
761
762 tbl = mwifiex_11n_get_rx_reorder_tbl(priv, tid,
763 add_ba_rsp->peer_mac_addr);
764 if (tbl) {
765 if ((block_ack_param_set & BLOCKACKPARAM_AMSDU_SUPP_MASK) &&
766 priv->add_ba_param.rx_amsdu &&
767 (priv->aggr_prio_tbl[tid].amsdu != BA_STREAM_NOT_ALLOWED))
768 tbl->amsdu = true;
769 else
770 tbl->amsdu = false;
771 }
772
773 mwifiex_dbg(priv->adapter, CMD,
774 "cmd: ADDBA RSP: %pM tid=%d ssn=%d win_size=%d\n",
775 add_ba_rsp->peer_mac_addr, tid, add_ba_rsp->ssn, win_size);
776
777 return 0;
778 }
779
780 /*
781 * This function handles BA stream timeout event by preparing and sending
782 * a command to the firmware.
783 */
784 void mwifiex_11n_ba_stream_timeout(struct mwifiex_private *priv,
785 struct host_cmd_ds_11n_batimeout *event)
786 {
787 struct host_cmd_ds_11n_delba delba;
788
789 memset(&delba, 0, sizeof(struct host_cmd_ds_11n_delba));
790 memcpy(delba.peer_mac_addr, event->peer_mac_addr, ETH_ALEN);
791
792 delba.del_ba_param_set |=
793 cpu_to_le16((u16) event->tid << DELBA_TID_POS);
794 delba.del_ba_param_set |= cpu_to_le16(
795 (u16) event->origninator << DELBA_INITIATOR_POS);
796 delba.reason_code = cpu_to_le16(WLAN_REASON_QSTA_TIMEOUT);
797 mwifiex_send_cmd(priv, HostCmd_CMD_11N_DELBA, 0, 0, &delba, false);
798 }
799
800 /*
801 * This function cleans up the Rx reorder table by deleting all the entries
802 * and re-initializing.
803 */
804 void mwifiex_11n_cleanup_reorder_tbl(struct mwifiex_private *priv)
805 {
806 struct mwifiex_rx_reorder_tbl *del_tbl_ptr, *tmp_node;
807 unsigned long flags;
808
809 spin_lock_irqsave(&priv->rx_reorder_tbl_lock, flags);
810 list_for_each_entry_safe(del_tbl_ptr, tmp_node,
811 &priv->rx_reorder_tbl_ptr, list) {
812 spin_unlock_irqrestore(&priv->rx_reorder_tbl_lock, flags);
813 mwifiex_del_rx_reorder_entry(priv, del_tbl_ptr);
814 spin_lock_irqsave(&priv->rx_reorder_tbl_lock, flags);
815 }
816 INIT_LIST_HEAD(&priv->rx_reorder_tbl_ptr);
817 spin_unlock_irqrestore(&priv->rx_reorder_tbl_lock, flags);
818
819 mwifiex_reset_11n_rx_seq_num(priv);
820 }
821
822 /*
823 * This function updates all rx_reorder_tbl's flags.
824 */
825 void mwifiex_update_rxreor_flags(struct mwifiex_adapter *adapter, u8 flags)
826 {
827 struct mwifiex_private *priv;
828 struct mwifiex_rx_reorder_tbl *tbl;
829 unsigned long lock_flags;
830 int i;
831
832 for (i = 0; i < adapter->priv_num; i++) {
833 priv = adapter->priv[i];
834 if (!priv)
835 continue;
836
837 spin_lock_irqsave(&priv->rx_reorder_tbl_lock, lock_flags);
838 if (list_empty(&priv->rx_reorder_tbl_ptr)) {
839 spin_unlock_irqrestore(&priv->rx_reorder_tbl_lock,
840 lock_flags);
841 continue;
842 }
843
844 list_for_each_entry(tbl, &priv->rx_reorder_tbl_ptr, list)
845 tbl->flags = flags;
846 spin_unlock_irqrestore(&priv->rx_reorder_tbl_lock, lock_flags);
847 }
848
849 return;
850 }
851
852 /* This function update all the rx_win_size based on coex flag
853 */
854 static void mwifiex_update_ampdu_rxwinsize(struct mwifiex_adapter *adapter,
855 bool coex_flag)
856 {
857 u8 i;
858 u32 rx_win_size;
859 struct mwifiex_private *priv;
860
861 dev_dbg(adapter->dev, "Update rxwinsize %d\n", coex_flag);
862
863 for (i = 0; i < adapter->priv_num; i++) {
864 if (!adapter->priv[i])
865 continue;
866 priv = adapter->priv[i];
867 rx_win_size = priv->add_ba_param.rx_win_size;
868 if (coex_flag) {
869 if (priv->bss_type == MWIFIEX_BSS_TYPE_STA)
870 priv->add_ba_param.rx_win_size =
871 MWIFIEX_STA_COEX_AMPDU_DEF_RXWINSIZE;
872 if (priv->bss_type == MWIFIEX_BSS_TYPE_P2P)
873 priv->add_ba_param.rx_win_size =
874 MWIFIEX_STA_COEX_AMPDU_DEF_RXWINSIZE;
875 if (priv->bss_type == MWIFIEX_BSS_TYPE_UAP)
876 priv->add_ba_param.rx_win_size =
877 MWIFIEX_UAP_COEX_AMPDU_DEF_RXWINSIZE;
878 } else {
879 if (priv->bss_type == MWIFIEX_BSS_TYPE_STA)
880 priv->add_ba_param.rx_win_size =
881 MWIFIEX_STA_AMPDU_DEF_RXWINSIZE;
882 if (priv->bss_type == MWIFIEX_BSS_TYPE_P2P)
883 priv->add_ba_param.rx_win_size =
884 MWIFIEX_STA_AMPDU_DEF_RXWINSIZE;
885 if (priv->bss_type == MWIFIEX_BSS_TYPE_UAP)
886 priv->add_ba_param.rx_win_size =
887 MWIFIEX_UAP_AMPDU_DEF_RXWINSIZE;
888 }
889
890 if (adapter->coex_win_size && adapter->coex_rx_win_size)
891 priv->add_ba_param.rx_win_size =
892 adapter->coex_rx_win_size;
893
894 if (rx_win_size != priv->add_ba_param.rx_win_size) {
895 if (!priv->media_connected)
896 continue;
897 for (i = 0; i < MAX_NUM_TID; i++)
898 mwifiex_11n_delba(priv, i);
899 }
900 }
901 }
902
903 /* This function check coex for RX BA
904 */
905 void mwifiex_coex_ampdu_rxwinsize(struct mwifiex_adapter *adapter)
906 {
907 u8 i;
908 struct mwifiex_private *priv;
909 u8 count = 0;
910
911 for (i = 0; i < adapter->priv_num; i++) {
912 if (adapter->priv[i]) {
913 priv = adapter->priv[i];
914 if (GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_STA) {
915 if (priv->media_connected)
916 count++;
917 }
918 if (GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_UAP) {
919 if (priv->bss_started)
920 count++;
921 }
922 }
923 if (count >= MWIFIEX_BSS_COEX_COUNT)
924 break;
925 }
926 if (count >= MWIFIEX_BSS_COEX_COUNT)
927 mwifiex_update_ampdu_rxwinsize(adapter, true);
928 else
929 mwifiex_update_ampdu_rxwinsize(adapter, false);
930 }
931
932 /* This function handles rxba_sync event
933 */
934 void mwifiex_11n_rxba_sync_event(struct mwifiex_private *priv,
935 u8 *event_buf, u16 len)
936 {
937 struct mwifiex_ie_types_rxba_sync *tlv_rxba = (void *)event_buf;
938 u16 tlv_type, tlv_len;
939 struct mwifiex_rx_reorder_tbl *rx_reor_tbl_ptr;
940 u8 i, j;
941 u16 seq_num, tlv_seq_num, tlv_bitmap_len;
942 int tlv_buf_left = len;
943 int ret;
944 u8 *tmp;
945
946 mwifiex_dbg_dump(priv->adapter, EVT_D, "RXBA_SYNC event:",
947 event_buf, len);
948 while (tlv_buf_left >= sizeof(*tlv_rxba)) {
949 tlv_type = le16_to_cpu(tlv_rxba->header.type);
950 tlv_len = le16_to_cpu(tlv_rxba->header.len);
951 if (tlv_type != TLV_TYPE_RXBA_SYNC) {
952 mwifiex_dbg(priv->adapter, ERROR,
953 "Wrong TLV id=0x%x\n", tlv_type);
954 return;
955 }
956
957 tlv_seq_num = le16_to_cpu(tlv_rxba->seq_num);
958 tlv_bitmap_len = le16_to_cpu(tlv_rxba->bitmap_len);
959 mwifiex_dbg(priv->adapter, INFO,
960 "%pM tid=%d seq_num=%d bitmap_len=%d\n",
961 tlv_rxba->mac, tlv_rxba->tid, tlv_seq_num,
962 tlv_bitmap_len);
963
964 rx_reor_tbl_ptr =
965 mwifiex_11n_get_rx_reorder_tbl(priv, tlv_rxba->tid,
966 tlv_rxba->mac);
967 if (!rx_reor_tbl_ptr) {
968 mwifiex_dbg(priv->adapter, ERROR,
969 "Can not find rx_reorder_tbl!");
970 return;
971 }
972
973 for (i = 0; i < tlv_bitmap_len; i++) {
974 for (j = 0 ; j < 8; j++) {
975 if (tlv_rxba->bitmap[i] & (1 << j)) {
976 seq_num = (MAX_TID_VALUE - 1) &
977 (tlv_seq_num + i * 8 + j);
978
979 mwifiex_dbg(priv->adapter, ERROR,
980 "drop packet,seq=%d\n",
981 seq_num);
982
983 ret = mwifiex_11n_rx_reorder_pkt
984 (priv, seq_num, tlv_rxba->tid,
985 tlv_rxba->mac, 0, NULL);
986
987 if (ret)
988 mwifiex_dbg(priv->adapter,
989 ERROR,
990 "Fail to drop packet");
991 }
992 }
993 }
994
995 tlv_buf_left -= (sizeof(*tlv_rxba) + tlv_len);
996 tmp = (u8 *)tlv_rxba + tlv_len + sizeof(*tlv_rxba);
997 tlv_rxba = (struct mwifiex_ie_types_rxba_sync *)tmp;
998 }
999 }
Linux with added FPC-III support