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 */
mwifiex_11n_dispatch_amsdu_pkt(struct mwifiex_private * priv,struct sk_buff * skb)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 */
mwifiex_11n_dispatch_pkt(struct mwifiex_private * priv,void * payload)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 * The caller must hold rx_reorder_tbl_lock spinlock.
108 */
109 static void
mwifiex_11n_dispatch_pkt_until_start_win(struct mwifiex_private * priv,struct mwifiex_rx_reorder_tbl * tbl,int start_win)110 mwifiex_11n_dispatch_pkt_until_start_win(struct mwifiex_private *priv,
111 struct mwifiex_rx_reorder_tbl *tbl,
112 int start_win)
113 {
114 int pkt_to_send, i;
115 void *rx_tmp_ptr;
116
117 pkt_to_send = (start_win > tbl->start_win) ?
118 min((start_win - tbl->start_win), tbl->win_size) :
119 tbl->win_size;
120
121 for (i = 0; i < pkt_to_send; ++i) {
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 if (rx_tmp_ptr)
128 mwifiex_11n_dispatch_pkt(priv, rx_tmp_ptr);
129 }
130
131 /*
132 * We don't have a circular buffer, hence use rotation to simulate
133 * circular buffer
134 */
135 for (i = 0; i < tbl->win_size - pkt_to_send; ++i) {
136 tbl->rx_reorder_ptr[i] = tbl->rx_reorder_ptr[pkt_to_send + i];
137 tbl->rx_reorder_ptr[pkt_to_send + i] = NULL;
138 }
139
140 tbl->start_win = start_win;
141 }
142
143 /*
144 * This function dispatches all packets in the Rx reorder table until
145 * a hole is found.
146 *
147 * The start window is adjusted automatically when a hole is located.
148 * Since the buffer is linear, the function uses rotation to simulate
149 * circular buffer.
150 *
151 * The caller must hold rx_reorder_tbl_lock spinlock.
152 */
153 static void
mwifiex_11n_scan_and_dispatch(struct mwifiex_private * priv,struct mwifiex_rx_reorder_tbl * tbl)154 mwifiex_11n_scan_and_dispatch(struct mwifiex_private *priv,
155 struct mwifiex_rx_reorder_tbl *tbl)
156 {
157 int i, j, xchg;
158 void *rx_tmp_ptr;
159
160 for (i = 0; i < tbl->win_size; ++i) {
161 if (!tbl->rx_reorder_ptr[i])
162 break;
163 rx_tmp_ptr = tbl->rx_reorder_ptr[i];
164 tbl->rx_reorder_ptr[i] = NULL;
165 mwifiex_11n_dispatch_pkt(priv, rx_tmp_ptr);
166 }
167
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 }
181
182 /*
183 * This function deletes the Rx reorder table and frees the memory.
184 *
185 * The function stops the associated timer and dispatches all the
186 * pending packets in the Rx reorder table before deletion.
187 *
188 * The caller must hold rx_reorder_tbl_lock spinlock.
189 */
190 static void
mwifiex_del_rx_reorder_entry(struct mwifiex_private * priv,struct mwifiex_rx_reorder_tbl * tbl)191 mwifiex_del_rx_reorder_entry(struct mwifiex_private *priv,
192 struct mwifiex_rx_reorder_tbl *tbl)
193 {
194 unsigned long flags;
195 int start_win;
196
197 if (!tbl)
198 return;
199
200 spin_lock_irqsave(&priv->adapter->rx_proc_lock, flags);
201 priv->adapter->rx_locked = true;
202 if (priv->adapter->rx_processing) {
203 spin_unlock_irqrestore(&priv->adapter->rx_proc_lock, flags);
204 flush_workqueue(priv->adapter->rx_workqueue);
205 } else {
206 spin_unlock_irqrestore(&priv->adapter->rx_proc_lock, flags);
207 }
208
209 start_win = (tbl->start_win + tbl->win_size) & (MAX_TID_VALUE - 1);
210 mwifiex_11n_dispatch_pkt_until_start_win(priv, tbl, start_win);
211
212 del_timer_sync(&tbl->timer_context.timer);
213 tbl->timer_context.timer_is_set = false;
214 list_del(&tbl->list);
215 kfree(tbl->rx_reorder_ptr);
216 kfree(tbl);
217
218 spin_lock_irqsave(&priv->adapter->rx_proc_lock, flags);
219 priv->adapter->rx_locked = false;
220 spin_unlock_irqrestore(&priv->adapter->rx_proc_lock, flags);
221
222 }
223
224 /*
225 * This function returns the pointer to an entry in Rx reordering
226 * table which matches the given TA/TID pair.
227 *
228 * The caller must hold rx_reorder_tbl_lock spinlock.
229 */
230 struct mwifiex_rx_reorder_tbl *
mwifiex_11n_get_rx_reorder_tbl(struct mwifiex_private * priv,int tid,u8 * ta)231 mwifiex_11n_get_rx_reorder_tbl(struct mwifiex_private *priv, int tid, u8 *ta)
232 {
233 struct mwifiex_rx_reorder_tbl *tbl;
234
235 list_for_each_entry(tbl, &priv->rx_reorder_tbl_ptr, list)
236 if (!memcmp(tbl->ta, ta, ETH_ALEN) && tbl->tid == tid)
237 return tbl;
238
239 return NULL;
240 }
241
242 /* This function retrieves the pointer to an entry in Rx reordering
243 * table which matches the given TA and deletes it.
244 */
mwifiex_11n_del_rx_reorder_tbl_by_ta(struct mwifiex_private * priv,u8 * ta)245 void mwifiex_11n_del_rx_reorder_tbl_by_ta(struct mwifiex_private *priv, u8 *ta)
246 {
247 struct mwifiex_rx_reorder_tbl *tbl, *tmp;
248 unsigned long flags;
249
250 if (!ta)
251 return;
252
253 spin_lock_irqsave(&priv->rx_reorder_tbl_lock, flags);
254 list_for_each_entry_safe(tbl, tmp, &priv->rx_reorder_tbl_ptr, list)
255 if (!memcmp(tbl->ta, ta, ETH_ALEN))
256 mwifiex_del_rx_reorder_entry(priv, tbl);
257 spin_unlock_irqrestore(&priv->rx_reorder_tbl_lock, flags);
258
259 return;
260 }
261
262 /*
263 * This function finds the last sequence number used in the packets
264 * buffered in Rx reordering table.
265 *
266 * The caller must hold rx_reorder_tbl_lock spinlock.
267 */
268 static int
mwifiex_11n_find_last_seq_num(struct reorder_tmr_cnxt * ctx)269 mwifiex_11n_find_last_seq_num(struct reorder_tmr_cnxt *ctx)
270 {
271 struct mwifiex_rx_reorder_tbl *rx_reorder_tbl_ptr = ctx->ptr;
272 int i;
273
274 for (i = rx_reorder_tbl_ptr->win_size - 1; i >= 0; --i)
275 if (rx_reorder_tbl_ptr->rx_reorder_ptr[i])
276 return i;
277
278 return -1;
279 }
280
281 /*
282 * This function flushes all the packets in Rx reordering table.
283 *
284 * The function checks if any packets are currently buffered in the
285 * table or not. In case there are packets available, it dispatches
286 * them and then dumps the Rx reordering table.
287 */
288 static void
mwifiex_flush_data(struct timer_list * t)289 mwifiex_flush_data(struct timer_list *t)
290 {
291 struct reorder_tmr_cnxt *ctx =
292 from_timer(ctx, t, timer);
293 int start_win, seq_num;
294 unsigned long flags;
295
296 ctx->timer_is_set = false;
297 spin_lock_irqsave(&ctx->priv->rx_reorder_tbl_lock, flags);
298 seq_num = mwifiex_11n_find_last_seq_num(ctx);
299
300 if (seq_num < 0) {
301 spin_unlock_irqrestore(&ctx->priv->rx_reorder_tbl_lock, flags);
302 return;
303 }
304
305 mwifiex_dbg(ctx->priv->adapter, INFO, "info: flush data %d\n", seq_num);
306 start_win = (ctx->ptr->start_win + seq_num + 1) & (MAX_TID_VALUE - 1);
307 mwifiex_11n_dispatch_pkt_until_start_win(ctx->priv, ctx->ptr,
308 start_win);
309 spin_unlock_irqrestore(&ctx->priv->rx_reorder_tbl_lock, flags);
310 }
311
312 /*
313 * This function creates an entry in Rx reordering table for the
314 * given TA/TID.
315 *
316 * The function also initializes the entry with sequence number, window
317 * size as well as initializes the timer.
318 *
319 * If the received TA/TID pair is already present, all the packets are
320 * dispatched and the window size is moved until the SSN.
321 */
322 static void
mwifiex_11n_create_rx_reorder_tbl(struct mwifiex_private * priv,u8 * ta,int tid,int win_size,int seq_num)323 mwifiex_11n_create_rx_reorder_tbl(struct mwifiex_private *priv, u8 *ta,
324 int tid, int win_size, int seq_num)
325 {
326 int i;
327 struct mwifiex_rx_reorder_tbl *tbl, *new_node;
328 u16 last_seq = 0;
329 unsigned long flags;
330 struct mwifiex_sta_node *node;
331
332 /*
333 * If we get a TID, ta pair which is already present dispatch all the
334 * the packets and move the window size until the ssn
335 */
336 spin_lock_irqsave(&priv->rx_reorder_tbl_lock, flags);
337 tbl = mwifiex_11n_get_rx_reorder_tbl(priv, tid, ta);
338 if (tbl) {
339 mwifiex_11n_dispatch_pkt_until_start_win(priv, tbl, seq_num);
340 spin_unlock_irqrestore(&priv->rx_reorder_tbl_lock, flags);
341 return;
342 }
343 spin_unlock_irqrestore(&priv->rx_reorder_tbl_lock, flags);
344 /* if !tbl then create one */
345 new_node = kzalloc(sizeof(struct mwifiex_rx_reorder_tbl), GFP_KERNEL);
346 if (!new_node)
347 return;
348
349 INIT_LIST_HEAD(&new_node->list);
350 new_node->tid = tid;
351 memcpy(new_node->ta, ta, ETH_ALEN);
352 new_node->start_win = seq_num;
353 new_node->init_win = seq_num;
354 new_node->flags = 0;
355
356 spin_lock_irqsave(&priv->sta_list_spinlock, flags);
357 if (mwifiex_queuing_ra_based(priv)) {
358 if (priv->bss_role == MWIFIEX_BSS_ROLE_UAP) {
359 node = mwifiex_get_sta_entry(priv, ta);
360 if (node)
361 last_seq = node->rx_seq[tid];
362 }
363 } else {
364 node = mwifiex_get_sta_entry(priv, ta);
365 if (node)
366 last_seq = node->rx_seq[tid];
367 else
368 last_seq = priv->rx_seq[tid];
369 }
370 spin_unlock_irqrestore(&priv->sta_list_spinlock, flags);
371
372 mwifiex_dbg(priv->adapter, INFO,
373 "info: last_seq=%d start_win=%d\n",
374 last_seq, new_node->start_win);
375
376 if (last_seq != MWIFIEX_DEF_11N_RX_SEQ_NUM &&
377 last_seq >= new_node->start_win) {
378 new_node->start_win = last_seq + 1;
379 new_node->flags |= RXREOR_INIT_WINDOW_SHIFT;
380 }
381
382 new_node->win_size = win_size;
383
384 new_node->rx_reorder_ptr = kcalloc(win_size, sizeof(void *),
385 GFP_KERNEL);
386 if (!new_node->rx_reorder_ptr) {
387 kfree((u8 *) new_node);
388 mwifiex_dbg(priv->adapter, ERROR,
389 "%s: failed to alloc reorder_ptr\n", __func__);
390 return;
391 }
392
393 new_node->timer_context.ptr = new_node;
394 new_node->timer_context.priv = priv;
395 new_node->timer_context.timer_is_set = false;
396
397 timer_setup(&new_node->timer_context.timer, mwifiex_flush_data, 0);
398
399 for (i = 0; i < win_size; ++i)
400 new_node->rx_reorder_ptr[i] = NULL;
401
402 spin_lock_irqsave(&priv->rx_reorder_tbl_lock, flags);
403 list_add_tail(&new_node->list, &priv->rx_reorder_tbl_ptr);
404 spin_unlock_irqrestore(&priv->rx_reorder_tbl_lock, flags);
405 }
406
407 static void
mwifiex_11n_rxreorder_timer_restart(struct mwifiex_rx_reorder_tbl * tbl)408 mwifiex_11n_rxreorder_timer_restart(struct mwifiex_rx_reorder_tbl *tbl)
409 {
410 u32 min_flush_time;
411
412 if (tbl->win_size >= MWIFIEX_BA_WIN_SIZE_32)
413 min_flush_time = MIN_FLUSH_TIMER_15_MS;
414 else
415 min_flush_time = MIN_FLUSH_TIMER_MS;
416
417 mod_timer(&tbl->timer_context.timer,
418 jiffies + msecs_to_jiffies(min_flush_time * tbl->win_size));
419
420 tbl->timer_context.timer_is_set = true;
421 }
422
423 /*
424 * This function prepares command for adding a BA request.
425 *
426 * Preparation includes -
427 * - Setting command ID and proper size
428 * - Setting add BA request buffer
429 * - Ensuring correct endian-ness
430 */
mwifiex_cmd_11n_addba_req(struct host_cmd_ds_command * cmd,void * data_buf)431 int mwifiex_cmd_11n_addba_req(struct host_cmd_ds_command *cmd, void *data_buf)
432 {
433 struct host_cmd_ds_11n_addba_req *add_ba_req = &cmd->params.add_ba_req;
434
435 cmd->command = cpu_to_le16(HostCmd_CMD_11N_ADDBA_REQ);
436 cmd->size = cpu_to_le16(sizeof(*add_ba_req) + S_DS_GEN);
437 memcpy(add_ba_req, data_buf, sizeof(*add_ba_req));
438
439 return 0;
440 }
441
442 /*
443 * This function prepares command for adding a BA response.
444 *
445 * Preparation includes -
446 * - Setting command ID and proper size
447 * - Setting add BA response buffer
448 * - Ensuring correct endian-ness
449 */
mwifiex_cmd_11n_addba_rsp_gen(struct mwifiex_private * priv,struct host_cmd_ds_command * cmd,struct host_cmd_ds_11n_addba_req * cmd_addba_req)450 int mwifiex_cmd_11n_addba_rsp_gen(struct mwifiex_private *priv,
451 struct host_cmd_ds_command *cmd,
452 struct host_cmd_ds_11n_addba_req
453 *cmd_addba_req)
454 {
455 struct host_cmd_ds_11n_addba_rsp *add_ba_rsp = &cmd->params.add_ba_rsp;
456 struct mwifiex_sta_node *sta_ptr;
457 u32 rx_win_size = priv->add_ba_param.rx_win_size;
458 u8 tid;
459 int win_size;
460 unsigned long flags;
461 uint16_t block_ack_param_set;
462
463 if ((GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_STA) &&
464 ISSUPP_TDLS_ENABLED(priv->adapter->fw_cap_info) &&
465 priv->adapter->is_hw_11ac_capable &&
466 memcmp(priv->cfg_bssid, cmd_addba_req->peer_mac_addr, ETH_ALEN)) {
467 spin_lock_irqsave(&priv->sta_list_spinlock, flags);
468 sta_ptr = mwifiex_get_sta_entry(priv,
469 cmd_addba_req->peer_mac_addr);
470 if (!sta_ptr) {
471 spin_unlock_irqrestore(&priv->sta_list_spinlock, flags);
472 mwifiex_dbg(priv->adapter, ERROR,
473 "BA setup with unknown TDLS peer %pM!\n",
474 cmd_addba_req->peer_mac_addr);
475 return -1;
476 }
477 if (sta_ptr->is_11ac_enabled)
478 rx_win_size = MWIFIEX_11AC_STA_AMPDU_DEF_RXWINSIZE;
479 spin_unlock_irqrestore(&priv->sta_list_spinlock, flags);
480 }
481
482 cmd->command = cpu_to_le16(HostCmd_CMD_11N_ADDBA_RSP);
483 cmd->size = cpu_to_le16(sizeof(*add_ba_rsp) + S_DS_GEN);
484
485 memcpy(add_ba_rsp->peer_mac_addr, cmd_addba_req->peer_mac_addr,
486 ETH_ALEN);
487 add_ba_rsp->dialog_token = cmd_addba_req->dialog_token;
488 add_ba_rsp->block_ack_tmo = cmd_addba_req->block_ack_tmo;
489 add_ba_rsp->ssn = cmd_addba_req->ssn;
490
491 block_ack_param_set = le16_to_cpu(cmd_addba_req->block_ack_param_set);
492 tid = (block_ack_param_set & IEEE80211_ADDBA_PARAM_TID_MASK)
493 >> BLOCKACKPARAM_TID_POS;
494 add_ba_rsp->status_code = cpu_to_le16(ADDBA_RSP_STATUS_ACCEPT);
495 block_ack_param_set &= ~IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK;
496
497 /* If we don't support AMSDU inside AMPDU, reset the bit */
498 if (!priv->add_ba_param.rx_amsdu ||
499 (priv->aggr_prio_tbl[tid].amsdu == BA_STREAM_NOT_ALLOWED))
500 block_ack_param_set &= ~BLOCKACKPARAM_AMSDU_SUPP_MASK;
501 block_ack_param_set |= rx_win_size << BLOCKACKPARAM_WINSIZE_POS;
502 add_ba_rsp->block_ack_param_set = cpu_to_le16(block_ack_param_set);
503 win_size = (le16_to_cpu(add_ba_rsp->block_ack_param_set)
504 & IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK)
505 >> BLOCKACKPARAM_WINSIZE_POS;
506 cmd_addba_req->block_ack_param_set = cpu_to_le16(block_ack_param_set);
507
508 mwifiex_11n_create_rx_reorder_tbl(priv, cmd_addba_req->peer_mac_addr,
509 tid, win_size,
510 le16_to_cpu(cmd_addba_req->ssn));
511 return 0;
512 }
513
514 /*
515 * This function prepares command for deleting a BA request.
516 *
517 * Preparation includes -
518 * - Setting command ID and proper size
519 * - Setting del BA request buffer
520 * - Ensuring correct endian-ness
521 */
mwifiex_cmd_11n_delba(struct host_cmd_ds_command * cmd,void * data_buf)522 int mwifiex_cmd_11n_delba(struct host_cmd_ds_command *cmd, void *data_buf)
523 {
524 struct host_cmd_ds_11n_delba *del_ba = &cmd->params.del_ba;
525
526 cmd->command = cpu_to_le16(HostCmd_CMD_11N_DELBA);
527 cmd->size = cpu_to_le16(sizeof(*del_ba) + S_DS_GEN);
528 memcpy(del_ba, data_buf, sizeof(*del_ba));
529
530 return 0;
531 }
532
533 /*
534 * This function identifies if Rx reordering is needed for a received packet.
535 *
536 * In case reordering is required, the function will do the reordering
537 * before sending it to kernel.
538 *
539 * The Rx reorder table is checked first with the received TID/TA pair. If
540 * not found, the received packet is dispatched immediately. But if found,
541 * the packet is reordered and all the packets in the updated Rx reordering
542 * table is dispatched until a hole is found.
543 *
544 * For sequence number less than the starting window, the packet is dropped.
545 */
mwifiex_11n_rx_reorder_pkt(struct mwifiex_private * priv,u16 seq_num,u16 tid,u8 * ta,u8 pkt_type,void * payload)546 int mwifiex_11n_rx_reorder_pkt(struct mwifiex_private *priv,
547 u16 seq_num, u16 tid,
548 u8 *ta, u8 pkt_type, void *payload)
549 {
550 struct mwifiex_rx_reorder_tbl *tbl;
551 int prev_start_win, start_win, end_win, win_size;
552 u16 pkt_index;
553 bool init_window_shift = false;
554 unsigned long flags;
555 int ret = 0;
556
557 spin_lock_irqsave(&priv->rx_reorder_tbl_lock, flags);
558 tbl = mwifiex_11n_get_rx_reorder_tbl(priv, tid, ta);
559 if (!tbl) {
560 spin_unlock_irqrestore(&priv->rx_reorder_tbl_lock, flags);
561 if (pkt_type != PKT_TYPE_BAR)
562 mwifiex_11n_dispatch_pkt(priv, payload);
563 return ret;
564 }
565
566 if ((pkt_type == PKT_TYPE_AMSDU) && !tbl->amsdu) {
567 spin_unlock_irqrestore(&priv->rx_reorder_tbl_lock, flags);
568 mwifiex_11n_dispatch_pkt(priv, payload);
569 return ret;
570 }
571
572 start_win = tbl->start_win;
573 prev_start_win = start_win;
574 win_size = tbl->win_size;
575 end_win = ((start_win + win_size) - 1) & (MAX_TID_VALUE - 1);
576 if (tbl->flags & RXREOR_INIT_WINDOW_SHIFT) {
577 init_window_shift = true;
578 tbl->flags &= ~RXREOR_INIT_WINDOW_SHIFT;
579 }
580
581 if (tbl->flags & RXREOR_FORCE_NO_DROP) {
582 mwifiex_dbg(priv->adapter, INFO,
583 "RXREOR_FORCE_NO_DROP when HS is activated\n");
584 tbl->flags &= ~RXREOR_FORCE_NO_DROP;
585 } else if (init_window_shift && seq_num < start_win &&
586 seq_num >= tbl->init_win) {
587 mwifiex_dbg(priv->adapter, INFO,
588 "Sender TID sequence number reset %d->%d for SSN %d\n",
589 start_win, seq_num, tbl->init_win);
590 tbl->start_win = start_win = seq_num;
591 end_win = ((start_win + win_size) - 1) & (MAX_TID_VALUE - 1);
592 } else {
593 /*
594 * If seq_num is less then starting win then ignore and drop
595 * the packet
596 */
597 if ((start_win + TWOPOW11) > (MAX_TID_VALUE - 1)) {
598 if (seq_num >= ((start_win + TWOPOW11) &
599 (MAX_TID_VALUE - 1)) &&
600 seq_num < start_win) {
601 ret = -1;
602 goto done;
603 }
604 } else if ((seq_num < start_win) ||
605 (seq_num >= (start_win + TWOPOW11))) {
606 ret = -1;
607 goto done;
608 }
609 }
610
611 /*
612 * If this packet is a BAR we adjust seq_num as
613 * WinStart = seq_num
614 */
615 if (pkt_type == PKT_TYPE_BAR)
616 seq_num = ((seq_num + win_size) - 1) & (MAX_TID_VALUE - 1);
617
618 if (((end_win < start_win) &&
619 (seq_num < start_win) && (seq_num > end_win)) ||
620 ((end_win > start_win) && ((seq_num > end_win) ||
621 (seq_num < start_win)))) {
622 end_win = seq_num;
623 if (((end_win - win_size) + 1) >= 0)
624 start_win = (end_win - win_size) + 1;
625 else
626 start_win = (MAX_TID_VALUE - (win_size - end_win)) + 1;
627 mwifiex_11n_dispatch_pkt_until_start_win(priv, tbl, start_win);
628 }
629
630 if (pkt_type != PKT_TYPE_BAR) {
631 if (seq_num >= start_win)
632 pkt_index = seq_num - start_win;
633 else
634 pkt_index = (seq_num+MAX_TID_VALUE) - start_win;
635
636 if (tbl->rx_reorder_ptr[pkt_index]) {
637 ret = -1;
638 goto done;
639 }
640
641 tbl->rx_reorder_ptr[pkt_index] = payload;
642 }
643
644 /*
645 * Dispatch all packets sequentially from start_win until a
646 * hole is found and adjust the start_win appropriately
647 */
648 mwifiex_11n_scan_and_dispatch(priv, tbl);
649
650 done:
651 if (!tbl->timer_context.timer_is_set ||
652 prev_start_win != tbl->start_win)
653 mwifiex_11n_rxreorder_timer_restart(tbl);
654
655 spin_unlock_irqrestore(&priv->rx_reorder_tbl_lock, flags);
656 return ret;
657 }
658
659 /*
660 * This function deletes an entry for a given TID/TA pair.
661 *
662 * The TID/TA are taken from del BA event body.
663 */
664 void
mwifiex_del_ba_tbl(struct mwifiex_private * priv,int tid,u8 * peer_mac,u8 type,int initiator)665 mwifiex_del_ba_tbl(struct mwifiex_private *priv, int tid, u8 *peer_mac,
666 u8 type, int initiator)
667 {
668 struct mwifiex_rx_reorder_tbl *tbl;
669 struct mwifiex_tx_ba_stream_tbl *ptx_tbl;
670 struct mwifiex_ra_list_tbl *ra_list;
671 u8 cleanup_rx_reorder_tbl;
672 unsigned long flags;
673 int tid_down;
674
675 if (type == TYPE_DELBA_RECEIVE)
676 cleanup_rx_reorder_tbl = (initiator) ? true : false;
677 else
678 cleanup_rx_reorder_tbl = (initiator) ? false : true;
679
680 mwifiex_dbg(priv->adapter, EVENT, "event: DELBA: %pM tid=%d initiator=%d\n",
681 peer_mac, tid, initiator);
682
683 if (cleanup_rx_reorder_tbl) {
684 spin_lock_irqsave(&priv->rx_reorder_tbl_lock, flags);
685 tbl = mwifiex_11n_get_rx_reorder_tbl(priv, tid,
686 peer_mac);
687 if (!tbl) {
688 spin_unlock_irqrestore(&priv->rx_reorder_tbl_lock,
689 flags);
690 mwifiex_dbg(priv->adapter, EVENT,
691 "event: TID, TA not found in table\n");
692 return;
693 }
694 mwifiex_del_rx_reorder_entry(priv, tbl);
695 spin_unlock_irqrestore(&priv->rx_reorder_tbl_lock, flags);
696 } else {
697 ptx_tbl = mwifiex_get_ba_tbl(priv, tid, peer_mac);
698 if (!ptx_tbl) {
699 mwifiex_dbg(priv->adapter, EVENT,
700 "event: TID, RA not found in table\n");
701 return;
702 }
703
704 tid_down = mwifiex_wmm_downgrade_tid(priv, tid);
705 ra_list = mwifiex_wmm_get_ralist_node(priv, tid_down, peer_mac);
706 if (ra_list) {
707 ra_list->amsdu_in_ampdu = false;
708 ra_list->ba_status = BA_SETUP_NONE;
709 }
710 spin_lock_irqsave(&priv->tx_ba_stream_tbl_lock, flags);
711 mwifiex_11n_delete_tx_ba_stream_tbl_entry(priv, ptx_tbl);
712 spin_unlock_irqrestore(&priv->tx_ba_stream_tbl_lock, flags);
713 }
714 }
715
716 /*
717 * This function handles the command response of an add BA response.
718 *
719 * Handling includes changing the header fields into CPU format and
720 * creating the stream, provided the add BA is accepted.
721 */
mwifiex_ret_11n_addba_resp(struct mwifiex_private * priv,struct host_cmd_ds_command * resp)722 int mwifiex_ret_11n_addba_resp(struct mwifiex_private *priv,
723 struct host_cmd_ds_command *resp)
724 {
725 struct host_cmd_ds_11n_addba_rsp *add_ba_rsp = &resp->params.add_ba_rsp;
726 int tid, win_size;
727 struct mwifiex_rx_reorder_tbl *tbl;
728 uint16_t block_ack_param_set;
729 unsigned long flags;
730
731 block_ack_param_set = le16_to_cpu(add_ba_rsp->block_ack_param_set);
732
733 tid = (block_ack_param_set & IEEE80211_ADDBA_PARAM_TID_MASK)
734 >> BLOCKACKPARAM_TID_POS;
735 /*
736 * Check if we had rejected the ADDBA, if yes then do not create
737 * the stream
738 */
739 if (le16_to_cpu(add_ba_rsp->status_code) != BA_RESULT_SUCCESS) {
740 mwifiex_dbg(priv->adapter, ERROR, "ADDBA RSP: failed %pM tid=%d)\n",
741 add_ba_rsp->peer_mac_addr, tid);
742
743 spin_lock_irqsave(&priv->rx_reorder_tbl_lock, flags);
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 spin_unlock_irqrestore(&priv->rx_reorder_tbl_lock, flags);
750 return 0;
751 }
752
753 win_size = (block_ack_param_set & IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK)
754 >> BLOCKACKPARAM_WINSIZE_POS;
755
756 spin_lock_irqsave(&priv->rx_reorder_tbl_lock, flags);
757 tbl = mwifiex_11n_get_rx_reorder_tbl(priv, tid,
758 add_ba_rsp->peer_mac_addr);
759 if (tbl) {
760 if ((block_ack_param_set & BLOCKACKPARAM_AMSDU_SUPP_MASK) &&
761 priv->add_ba_param.rx_amsdu &&
762 (priv->aggr_prio_tbl[tid].amsdu != BA_STREAM_NOT_ALLOWED))
763 tbl->amsdu = true;
764 else
765 tbl->amsdu = false;
766 }
767 spin_unlock_irqrestore(&priv->rx_reorder_tbl_lock, flags);
768
769 mwifiex_dbg(priv->adapter, CMD,
770 "cmd: ADDBA RSP: %pM tid=%d ssn=%d win_size=%d\n",
771 add_ba_rsp->peer_mac_addr, tid, add_ba_rsp->ssn, win_size);
772
773 return 0;
774 }
775
776 /*
777 * This function handles BA stream timeout event by preparing and sending
778 * a command to the firmware.
779 */
mwifiex_11n_ba_stream_timeout(struct mwifiex_private * priv,struct host_cmd_ds_11n_batimeout * event)780 void mwifiex_11n_ba_stream_timeout(struct mwifiex_private *priv,
781 struct host_cmd_ds_11n_batimeout *event)
782 {
783 struct host_cmd_ds_11n_delba delba;
784
785 memset(&delba, 0, sizeof(struct host_cmd_ds_11n_delba));
786 memcpy(delba.peer_mac_addr, event->peer_mac_addr, ETH_ALEN);
787
788 delba.del_ba_param_set |=
789 cpu_to_le16((u16) event->tid << DELBA_TID_POS);
790 delba.del_ba_param_set |= cpu_to_le16(
791 (u16) event->origninator << DELBA_INITIATOR_POS);
792 delba.reason_code = cpu_to_le16(WLAN_REASON_QSTA_TIMEOUT);
793 mwifiex_send_cmd(priv, HostCmd_CMD_11N_DELBA, 0, 0, &delba, false);
794 }
795
796 /*
797 * This function cleans up the Rx reorder table by deleting all the entries
798 * and re-initializing.
799 */
mwifiex_11n_cleanup_reorder_tbl(struct mwifiex_private * priv)800 void mwifiex_11n_cleanup_reorder_tbl(struct mwifiex_private *priv)
801 {
802 struct mwifiex_rx_reorder_tbl *del_tbl_ptr, *tmp_node;
803 unsigned long flags;
804
805 spin_lock_irqsave(&priv->rx_reorder_tbl_lock, flags);
806 list_for_each_entry_safe(del_tbl_ptr, tmp_node,
807 &priv->rx_reorder_tbl_ptr, list)
808 mwifiex_del_rx_reorder_entry(priv, del_tbl_ptr);
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 */
mwifiex_update_rxreor_flags(struct mwifiex_adapter * adapter,u8 flags)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 list_for_each_entry(tbl, &priv->rx_reorder_tbl_ptr, list)
832 tbl->flags = flags;
833 spin_unlock_irqrestore(&priv->rx_reorder_tbl_lock, lock_flags);
834 }
835
836 return;
837 }
838
839 /* This function update all the rx_win_size based on coex flag
840 */
mwifiex_update_ampdu_rxwinsize(struct mwifiex_adapter * adapter,bool coex_flag)841 static void mwifiex_update_ampdu_rxwinsize(struct mwifiex_adapter *adapter,
842 bool coex_flag)
843 {
844 u8 i;
845 u32 rx_win_size;
846 struct mwifiex_private *priv;
847
848 dev_dbg(adapter->dev, "Update rxwinsize %d\n", coex_flag);
849
850 for (i = 0; i < adapter->priv_num; i++) {
851 if (!adapter->priv[i])
852 continue;
853 priv = adapter->priv[i];
854 rx_win_size = priv->add_ba_param.rx_win_size;
855 if (coex_flag) {
856 if (priv->bss_type == MWIFIEX_BSS_TYPE_STA)
857 priv->add_ba_param.rx_win_size =
858 MWIFIEX_STA_COEX_AMPDU_DEF_RXWINSIZE;
859 if (priv->bss_type == MWIFIEX_BSS_TYPE_P2P)
860 priv->add_ba_param.rx_win_size =
861 MWIFIEX_STA_COEX_AMPDU_DEF_RXWINSIZE;
862 if (priv->bss_type == MWIFIEX_BSS_TYPE_UAP)
863 priv->add_ba_param.rx_win_size =
864 MWIFIEX_UAP_COEX_AMPDU_DEF_RXWINSIZE;
865 } else {
866 if (priv->bss_type == MWIFIEX_BSS_TYPE_STA)
867 priv->add_ba_param.rx_win_size =
868 MWIFIEX_STA_AMPDU_DEF_RXWINSIZE;
869 if (priv->bss_type == MWIFIEX_BSS_TYPE_P2P)
870 priv->add_ba_param.rx_win_size =
871 MWIFIEX_STA_AMPDU_DEF_RXWINSIZE;
872 if (priv->bss_type == MWIFIEX_BSS_TYPE_UAP)
873 priv->add_ba_param.rx_win_size =
874 MWIFIEX_UAP_AMPDU_DEF_RXWINSIZE;
875 }
876
877 if (adapter->coex_win_size && adapter->coex_rx_win_size)
878 priv->add_ba_param.rx_win_size =
879 adapter->coex_rx_win_size;
880
881 if (rx_win_size != priv->add_ba_param.rx_win_size) {
882 if (!priv->media_connected)
883 continue;
884 for (i = 0; i < MAX_NUM_TID; i++)
885 mwifiex_11n_delba(priv, i);
886 }
887 }
888 }
889
890 /* This function check coex for RX BA
891 */
mwifiex_coex_ampdu_rxwinsize(struct mwifiex_adapter * adapter)892 void mwifiex_coex_ampdu_rxwinsize(struct mwifiex_adapter *adapter)
893 {
894 u8 i;
895 struct mwifiex_private *priv;
896 u8 count = 0;
897
898 for (i = 0; i < adapter->priv_num; i++) {
899 if (adapter->priv[i]) {
900 priv = adapter->priv[i];
901 if (GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_STA) {
902 if (priv->media_connected)
903 count++;
904 }
905 if (GET_BSS_ROLE(priv) == MWIFIEX_BSS_ROLE_UAP) {
906 if (priv->bss_started)
907 count++;
908 }
909 }
910 if (count >= MWIFIEX_BSS_COEX_COUNT)
911 break;
912 }
913 if (count >= MWIFIEX_BSS_COEX_COUNT)
914 mwifiex_update_ampdu_rxwinsize(adapter, true);
915 else
916 mwifiex_update_ampdu_rxwinsize(adapter, false);
917 }
918
919 /* This function handles rxba_sync event
920 */
mwifiex_11n_rxba_sync_event(struct mwifiex_private * priv,u8 * event_buf,u16 len)921 void mwifiex_11n_rxba_sync_event(struct mwifiex_private *priv,
922 u8 *event_buf, u16 len)
923 {
924 struct mwifiex_ie_types_rxba_sync *tlv_rxba = (void *)event_buf;
925 u16 tlv_type, tlv_len;
926 struct mwifiex_rx_reorder_tbl *rx_reor_tbl_ptr;
927 u8 i, j;
928 u16 seq_num, tlv_seq_num, tlv_bitmap_len;
929 int tlv_buf_left = len;
930 int ret;
931 u8 *tmp;
932 unsigned long flags;
933
934 mwifiex_dbg_dump(priv->adapter, EVT_D, "RXBA_SYNC event:",
935 event_buf, len);
936 while (tlv_buf_left >= sizeof(*tlv_rxba)) {
937 tlv_type = le16_to_cpu(tlv_rxba->header.type);
938 tlv_len = le16_to_cpu(tlv_rxba->header.len);
939 if (tlv_type != TLV_TYPE_RXBA_SYNC) {
940 mwifiex_dbg(priv->adapter, ERROR,
941 "Wrong TLV id=0x%x\n", tlv_type);
942 return;
943 }
944
945 tlv_seq_num = le16_to_cpu(tlv_rxba->seq_num);
946 tlv_bitmap_len = le16_to_cpu(tlv_rxba->bitmap_len);
947 mwifiex_dbg(priv->adapter, INFO,
948 "%pM tid=%d seq_num=%d bitmap_len=%d\n",
949 tlv_rxba->mac, tlv_rxba->tid, tlv_seq_num,
950 tlv_bitmap_len);
951
952 spin_lock_irqsave(&priv->rx_reorder_tbl_lock, flags);
953 rx_reor_tbl_ptr =
954 mwifiex_11n_get_rx_reorder_tbl(priv, tlv_rxba->tid,
955 tlv_rxba->mac);
956 if (!rx_reor_tbl_ptr) {
957 spin_unlock_irqrestore(&priv->rx_reorder_tbl_lock,
958 flags);
959 mwifiex_dbg(priv->adapter, ERROR,
960 "Can not find rx_reorder_tbl!");
961 return;
962 }
963 spin_unlock_irqrestore(&priv->rx_reorder_tbl_lock, flags);
964
965 for (i = 0; i < tlv_bitmap_len; i++) {
966 for (j = 0 ; j < 8; j++) {
967 if (tlv_rxba->bitmap[i] & (1 << j)) {
968 seq_num = (MAX_TID_VALUE - 1) &
969 (tlv_seq_num + i * 8 + j);
970
971 mwifiex_dbg(priv->adapter, ERROR,
972 "drop packet,seq=%d\n",
973 seq_num);
974
975 ret = mwifiex_11n_rx_reorder_pkt
976 (priv, seq_num, tlv_rxba->tid,
977 tlv_rxba->mac, 0, NULL);
978
979 if (ret)
980 mwifiex_dbg(priv->adapter,
981 ERROR,
982 "Fail to drop packet");
983 }
984 }
985 }
986
987 tlv_buf_left -= (sizeof(*tlv_rxba) + tlv_len);
988 tmp = (u8 *)tlv_rxba + tlv_len + sizeof(*tlv_rxba);
989 tlv_rxba = (struct mwifiex_ie_types_rxba_sync *)tmp;
990 }
991 }
992
