Commit | Line | Data |
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5e6e3a92 BZ |
1 | /* |
2 | * Marvell Wireless LAN device driver: 802.11n RX Re-ordering | |
3 | * | |
65da33f5 | 4 | * Copyright (C) 2011-2014, Marvell International Ltd. |
5e6e3a92 BZ |
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 | ||
4c9f9fb2 AK |
29 | /* This function will dispatch amsdu packet and forward it to kernel/upper |
30 | * layer. | |
31 | */ | |
32 | static int mwifiex_11n_dispatch_amsdu_pkt(struct mwifiex_private *priv, | |
33 | struct sk_buff *skb) | |
34 | { | |
35 | struct rxpd *local_rx_pd = (struct rxpd *)(skb->data); | |
36 | int ret; | |
37 | ||
38 | if (le16_to_cpu(local_rx_pd->rx_pkt_type) == PKT_TYPE_AMSDU) { | |
39 | struct sk_buff_head list; | |
40 | struct sk_buff *rx_skb; | |
41 | ||
42 | __skb_queue_head_init(&list); | |
43 | ||
44 | skb_pull(skb, le16_to_cpu(local_rx_pd->rx_pkt_offset)); | |
45 | skb_trim(skb, le16_to_cpu(local_rx_pd->rx_pkt_length)); | |
46 | ||
47 | ieee80211_amsdu_to_8023s(skb, &list, priv->curr_addr, | |
48 | priv->wdev->iftype, 0, false); | |
49 | ||
50 | while (!skb_queue_empty(&list)) { | |
51 | rx_skb = __skb_dequeue(&list); | |
52 | ret = mwifiex_recv_packet(priv, rx_skb); | |
53 | if (ret == -1) | |
54 | dev_err(priv->adapter->dev, | |
55 | "Rx of A-MSDU failed"); | |
56 | } | |
57 | return 0; | |
58 | } | |
59 | ||
60 | return -1; | |
61 | } | |
62 | ||
5e6e43eb AK |
63 | /* This function will process the rx packet and forward it to kernel/upper |
64 | * layer. | |
65 | */ | |
66 | static int mwifiex_11n_dispatch_pkt(struct mwifiex_private *priv, void *payload) | |
67 | { | |
4c9f9fb2 AK |
68 | int ret = mwifiex_11n_dispatch_amsdu_pkt(priv, payload); |
69 | ||
70 | if (!ret) | |
71 | return 0; | |
72 | ||
5e6e43eb AK |
73 | if (priv->bss_role == MWIFIEX_BSS_ROLE_UAP) |
74 | return mwifiex_handle_uap_rx_forward(priv, payload); | |
75 | ||
76 | return mwifiex_process_rx_packet(priv, payload); | |
77 | } | |
78 | ||
5e6e3a92 | 79 | /* |
8c00228e YAP |
80 | * This function dispatches all packets in the Rx reorder table until the |
81 | * start window. | |
5e6e3a92 BZ |
82 | * |
83 | * There could be holes in the buffer, which are skipped by the function. | |
84 | * Since the buffer is linear, the function uses rotation to simulate | |
85 | * circular buffer. | |
86 | */ | |
ab581472 | 87 | static void |
5e6e43eb AK |
88 | mwifiex_11n_dispatch_pkt_until_start_win(struct mwifiex_private *priv, |
89 | struct mwifiex_rx_reorder_tbl *tbl, | |
90 | int start_win) | |
5e6e3a92 | 91 | { |
8c00228e | 92 | int pkt_to_send, i; |
270e58e8 | 93 | void *rx_tmp_ptr; |
5e6e3a92 BZ |
94 | unsigned long flags; |
95 | ||
8c00228e YAP |
96 | pkt_to_send = (start_win > tbl->start_win) ? |
97 | min((start_win - tbl->start_win), tbl->win_size) : | |
98 | tbl->win_size; | |
5e6e3a92 | 99 | |
8c00228e | 100 | for (i = 0; i < pkt_to_send; ++i) { |
5e6e3a92 BZ |
101 | spin_lock_irqsave(&priv->rx_pkt_lock, flags); |
102 | rx_tmp_ptr = NULL; | |
8c00228e YAP |
103 | if (tbl->rx_reorder_ptr[i]) { |
104 | rx_tmp_ptr = tbl->rx_reorder_ptr[i]; | |
105 | tbl->rx_reorder_ptr[i] = NULL; | |
5e6e3a92 BZ |
106 | } |
107 | spin_unlock_irqrestore(&priv->rx_pkt_lock, flags); | |
5e6e43eb AK |
108 | if (rx_tmp_ptr) |
109 | mwifiex_11n_dispatch_pkt(priv, rx_tmp_ptr); | |
5e6e3a92 BZ |
110 | } |
111 | ||
112 | spin_lock_irqsave(&priv->rx_pkt_lock, flags); | |
113 | /* | |
114 | * We don't have a circular buffer, hence use rotation to simulate | |
115 | * circular buffer | |
116 | */ | |
8c00228e YAP |
117 | for (i = 0; i < tbl->win_size - pkt_to_send; ++i) { |
118 | tbl->rx_reorder_ptr[i] = tbl->rx_reorder_ptr[pkt_to_send + i]; | |
119 | tbl->rx_reorder_ptr[pkt_to_send + i] = NULL; | |
5e6e3a92 BZ |
120 | } |
121 | ||
8c00228e | 122 | tbl->start_win = start_win; |
5e6e3a92 | 123 | spin_unlock_irqrestore(&priv->rx_pkt_lock, flags); |
5e6e3a92 BZ |
124 | } |
125 | ||
126 | /* | |
127 | * This function dispatches all packets in the Rx reorder table until | |
128 | * a hole is found. | |
129 | * | |
130 | * The start window is adjusted automatically when a hole is located. | |
131 | * Since the buffer is linear, the function uses rotation to simulate | |
132 | * circular buffer. | |
133 | */ | |
ab581472 | 134 | static void |
5e6e3a92 | 135 | mwifiex_11n_scan_and_dispatch(struct mwifiex_private *priv, |
8c00228e | 136 | struct mwifiex_rx_reorder_tbl *tbl) |
5e6e3a92 BZ |
137 | { |
138 | int i, j, xchg; | |
270e58e8 | 139 | void *rx_tmp_ptr; |
5e6e3a92 BZ |
140 | unsigned long flags; |
141 | ||
8c00228e | 142 | for (i = 0; i < tbl->win_size; ++i) { |
5e6e3a92 | 143 | spin_lock_irqsave(&priv->rx_pkt_lock, flags); |
8c00228e | 144 | if (!tbl->rx_reorder_ptr[i]) { |
5e6e3a92 BZ |
145 | spin_unlock_irqrestore(&priv->rx_pkt_lock, flags); |
146 | break; | |
147 | } | |
8c00228e YAP |
148 | rx_tmp_ptr = tbl->rx_reorder_ptr[i]; |
149 | tbl->rx_reorder_ptr[i] = NULL; | |
5e6e3a92 | 150 | spin_unlock_irqrestore(&priv->rx_pkt_lock, flags); |
5e6e43eb | 151 | mwifiex_11n_dispatch_pkt(priv, rx_tmp_ptr); |
5e6e3a92 BZ |
152 | } |
153 | ||
154 | spin_lock_irqsave(&priv->rx_pkt_lock, flags); | |
155 | /* | |
156 | * We don't have a circular buffer, hence use rotation to simulate | |
157 | * circular buffer | |
158 | */ | |
159 | if (i > 0) { | |
8c00228e | 160 | xchg = tbl->win_size - i; |
5e6e3a92 | 161 | for (j = 0; j < xchg; ++j) { |
8c00228e YAP |
162 | tbl->rx_reorder_ptr[j] = tbl->rx_reorder_ptr[i + j]; |
163 | tbl->rx_reorder_ptr[i + j] = NULL; | |
5e6e3a92 BZ |
164 | } |
165 | } | |
8c00228e | 166 | tbl->start_win = (tbl->start_win + i) & (MAX_TID_VALUE - 1); |
5e6e3a92 | 167 | spin_unlock_irqrestore(&priv->rx_pkt_lock, flags); |
5e6e3a92 BZ |
168 | } |
169 | ||
170 | /* | |
171 | * This function deletes the Rx reorder table and frees the memory. | |
172 | * | |
173 | * The function stops the associated timer and dispatches all the | |
174 | * pending packets in the Rx reorder table before deletion. | |
175 | */ | |
176 | static void | |
8c00228e YAP |
177 | mwifiex_del_rx_reorder_entry(struct mwifiex_private *priv, |
178 | struct mwifiex_rx_reorder_tbl *tbl) | |
5e6e3a92 BZ |
179 | { |
180 | unsigned long flags; | |
63410c37 | 181 | int start_win; |
5e6e3a92 | 182 | |
8c00228e | 183 | if (!tbl) |
5e6e3a92 BZ |
184 | return; |
185 | ||
6e251174 AP |
186 | spin_lock_irqsave(&priv->adapter->rx_proc_lock, flags); |
187 | priv->adapter->rx_locked = true; | |
188 | if (priv->adapter->rx_processing) { | |
189 | spin_unlock_irqrestore(&priv->adapter->rx_proc_lock, flags); | |
190 | flush_workqueue(priv->adapter->rx_workqueue); | |
191 | } else { | |
192 | spin_unlock_irqrestore(&priv->adapter->rx_proc_lock, flags); | |
193 | } | |
194 | ||
63410c37 | 195 | start_win = (tbl->start_win + tbl->win_size) & (MAX_TID_VALUE - 1); |
5e6e43eb | 196 | mwifiex_11n_dispatch_pkt_until_start_win(priv, tbl, start_win); |
5e6e3a92 | 197 | |
629873f2 | 198 | del_timer_sync(&tbl->timer_context.timer); |
3a8fede1 | 199 | tbl->timer_context.timer_is_set = false; |
5e6e3a92 BZ |
200 | |
201 | spin_lock_irqsave(&priv->rx_reorder_tbl_lock, flags); | |
8c00228e | 202 | list_del(&tbl->list); |
5e6e3a92 BZ |
203 | spin_unlock_irqrestore(&priv->rx_reorder_tbl_lock, flags); |
204 | ||
8c00228e YAP |
205 | kfree(tbl->rx_reorder_ptr); |
206 | kfree(tbl); | |
6e251174 AP |
207 | |
208 | spin_lock_irqsave(&priv->adapter->rx_proc_lock, flags); | |
209 | priv->adapter->rx_locked = false; | |
210 | spin_unlock_irqrestore(&priv->adapter->rx_proc_lock, flags); | |
211 | ||
5e6e3a92 BZ |
212 | } |
213 | ||
214 | /* | |
215 | * This function returns the pointer to an entry in Rx reordering | |
216 | * table which matches the given TA/TID pair. | |
217 | */ | |
d1cf3b95 | 218 | struct mwifiex_rx_reorder_tbl * |
5e6e3a92 BZ |
219 | mwifiex_11n_get_rx_reorder_tbl(struct mwifiex_private *priv, int tid, u8 *ta) |
220 | { | |
8c00228e | 221 | struct mwifiex_rx_reorder_tbl *tbl; |
5e6e3a92 BZ |
222 | unsigned long flags; |
223 | ||
224 | spin_lock_irqsave(&priv->rx_reorder_tbl_lock, flags); | |
8c00228e YAP |
225 | list_for_each_entry(tbl, &priv->rx_reorder_tbl_ptr, list) { |
226 | if (!memcmp(tbl->ta, ta, ETH_ALEN) && tbl->tid == tid) { | |
5e6e3a92 BZ |
227 | spin_unlock_irqrestore(&priv->rx_reorder_tbl_lock, |
228 | flags); | |
8c00228e | 229 | return tbl; |
5e6e3a92 BZ |
230 | } |
231 | } | |
232 | spin_unlock_irqrestore(&priv->rx_reorder_tbl_lock, flags); | |
233 | ||
234 | return NULL; | |
235 | } | |
236 | ||
3e238a11 AP |
237 | /* This function retrieves the pointer to an entry in Rx reordering |
238 | * table which matches the given TA and deletes it. | |
239 | */ | |
240 | void mwifiex_11n_del_rx_reorder_tbl_by_ta(struct mwifiex_private *priv, u8 *ta) | |
241 | { | |
242 | struct mwifiex_rx_reorder_tbl *tbl, *tmp; | |
243 | unsigned long flags; | |
244 | ||
245 | if (!ta) | |
246 | return; | |
247 | ||
248 | spin_lock_irqsave(&priv->rx_reorder_tbl_lock, flags); | |
249 | list_for_each_entry_safe(tbl, tmp, &priv->rx_reorder_tbl_ptr, list) { | |
250 | if (!memcmp(tbl->ta, ta, ETH_ALEN)) { | |
251 | spin_unlock_irqrestore(&priv->rx_reorder_tbl_lock, | |
252 | flags); | |
253 | mwifiex_del_rx_reorder_entry(priv, tbl); | |
254 | spin_lock_irqsave(&priv->rx_reorder_tbl_lock, flags); | |
255 | } | |
256 | } | |
257 | spin_unlock_irqrestore(&priv->rx_reorder_tbl_lock, flags); | |
258 | ||
259 | return; | |
260 | } | |
261 | ||
5e6e3a92 BZ |
262 | /* |
263 | * This function finds the last sequence number used in the packets | |
264 | * buffered in Rx reordering table. | |
265 | */ | |
266 | static int | |
2d702830 | 267 | mwifiex_11n_find_last_seq_num(struct reorder_tmr_cnxt *ctx) |
5e6e3a92 | 268 | { |
2d702830 AK |
269 | struct mwifiex_rx_reorder_tbl *rx_reorder_tbl_ptr = ctx->ptr; |
270 | struct mwifiex_private *priv = ctx->priv; | |
271 | unsigned long flags; | |
5e6e3a92 BZ |
272 | int i; |
273 | ||
2d702830 AK |
274 | spin_lock_irqsave(&priv->rx_reorder_tbl_lock, flags); |
275 | for (i = rx_reorder_tbl_ptr->win_size - 1; i >= 0; --i) { | |
276 | if (rx_reorder_tbl_ptr->rx_reorder_ptr[i]) { | |
277 | spin_unlock_irqrestore(&priv->rx_reorder_tbl_lock, | |
278 | flags); | |
5e6e3a92 | 279 | return i; |
2d702830 AK |
280 | } |
281 | } | |
282 | spin_unlock_irqrestore(&priv->rx_reorder_tbl_lock, flags); | |
5e6e3a92 BZ |
283 | |
284 | return -1; | |
285 | } | |
286 | ||
287 | /* | |
288 | * This function flushes all the packets in Rx reordering table. | |
289 | * | |
290 | * The function checks if any packets are currently buffered in the | |
291 | * table or not. In case there are packets available, it dispatches | |
292 | * them and then dumps the Rx reordering table. | |
293 | */ | |
294 | static void | |
295 | mwifiex_flush_data(unsigned long context) | |
296 | { | |
8c00228e | 297 | struct reorder_tmr_cnxt *ctx = |
5e6e3a92 | 298 | (struct reorder_tmr_cnxt *) context; |
63410c37 | 299 | int start_win, seq_num; |
5e6e3a92 | 300 | |
3a8fede1 | 301 | ctx->timer_is_set = false; |
2d702830 | 302 | seq_num = mwifiex_11n_find_last_seq_num(ctx); |
bb7de2ba | 303 | |
63410c37 | 304 | if (seq_num < 0) |
bb7de2ba YAP |
305 | return; |
306 | ||
63410c37 AK |
307 | dev_dbg(ctx->priv->adapter->dev, "info: flush data %d\n", seq_num); |
308 | start_win = (ctx->ptr->start_win + seq_num + 1) & (MAX_TID_VALUE - 1); | |
5e6e43eb AK |
309 | mwifiex_11n_dispatch_pkt_until_start_win(ctx->priv, ctx->ptr, |
310 | start_win); | |
5e6e3a92 BZ |
311 | } |
312 | ||
313 | /* | |
314 | * This function creates an entry in Rx reordering table for the | |
315 | * given TA/TID. | |
316 | * | |
317 | * The function also initializes the entry with sequence number, window | |
318 | * size as well as initializes the timer. | |
319 | * | |
320 | * If the received TA/TID pair is already present, all the packets are | |
321 | * dispatched and the window size is moved until the SSN. | |
322 | */ | |
323 | static void | |
324 | mwifiex_11n_create_rx_reorder_tbl(struct mwifiex_private *priv, u8 *ta, | |
84266841 | 325 | int tid, int win_size, int seq_num) |
5e6e3a92 BZ |
326 | { |
327 | int i; | |
8c00228e | 328 | struct mwifiex_rx_reorder_tbl *tbl, *new_node; |
5e6e3a92 BZ |
329 | u16 last_seq = 0; |
330 | unsigned long flags; | |
5a009adf | 331 | struct mwifiex_sta_node *node; |
5e6e3a92 BZ |
332 | |
333 | /* | |
334 | * If we get a TID, ta pair which is already present dispatch all the | |
335 | * the packets and move the window size until the ssn | |
336 | */ | |
8c00228e YAP |
337 | tbl = mwifiex_11n_get_rx_reorder_tbl(priv, tid, ta); |
338 | if (tbl) { | |
5e6e43eb | 339 | mwifiex_11n_dispatch_pkt_until_start_win(priv, tbl, seq_num); |
5e6e3a92 BZ |
340 | return; |
341 | } | |
8c00228e | 342 | /* if !tbl then create one */ |
5e6e3a92 | 343 | new_node = kzalloc(sizeof(struct mwifiex_rx_reorder_tbl), GFP_KERNEL); |
0d2e7a5c | 344 | if (!new_node) |
5e6e3a92 | 345 | return; |
5e6e3a92 BZ |
346 | |
347 | INIT_LIST_HEAD(&new_node->list); | |
348 | new_node->tid = tid; | |
349 | memcpy(new_node->ta, ta, ETH_ALEN); | |
350 | new_node->start_win = seq_num; | |
8acbea61 PS |
351 | new_node->init_win = seq_num; |
352 | new_node->flags = 0; | |
5a009adf | 353 | |
c11fb985 | 354 | spin_lock_irqsave(&priv->sta_list_spinlock, flags); |
5a009adf | 355 | if (mwifiex_queuing_ra_based(priv)) { |
5e6e3a92 | 356 | dev_dbg(priv->adapter->dev, |
5a009adf | 357 | "info: AP/ADHOC:last_seq=%d start_win=%d\n", |
5e6e3a92 | 358 | last_seq, new_node->start_win); |
5a009adf AP |
359 | if (priv->bss_role == MWIFIEX_BSS_ROLE_UAP) { |
360 | node = mwifiex_get_sta_entry(priv, ta); | |
361 | if (node) | |
362 | last_seq = node->rx_seq[tid]; | |
363 | } | |
364 | } else { | |
daeb5bb4 AP |
365 | node = mwifiex_get_sta_entry(priv, ta); |
366 | if (node) | |
367 | last_seq = node->rx_seq[tid]; | |
368 | else | |
369 | last_seq = priv->rx_seq[tid]; | |
5a009adf | 370 | } |
c11fb985 | 371 | spin_unlock_irqrestore(&priv->sta_list_spinlock, flags); |
5e6e3a92 | 372 | |
92583924 | 373 | if (last_seq != MWIFIEX_DEF_11N_RX_SEQ_NUM && |
8acbea61 | 374 | last_seq >= new_node->start_win) { |
5e6e3a92 | 375 | new_node->start_win = last_seq + 1; |
8acbea61 PS |
376 | new_node->flags |= RXREOR_INIT_WINDOW_SHIFT; |
377 | } | |
5e6e3a92 BZ |
378 | |
379 | new_node->win_size = win_size; | |
380 | ||
381 | new_node->rx_reorder_ptr = kzalloc(sizeof(void *) * win_size, | |
382 | GFP_KERNEL); | |
383 | if (!new_node->rx_reorder_ptr) { | |
384 | kfree((u8 *) new_node); | |
385 | dev_err(priv->adapter->dev, | |
386 | "%s: failed to alloc reorder_ptr\n", __func__); | |
387 | return; | |
388 | } | |
389 | ||
390 | new_node->timer_context.ptr = new_node; | |
391 | new_node->timer_context.priv = priv; | |
3a8fede1 | 392 | new_node->timer_context.timer_is_set = false; |
5e6e3a92 BZ |
393 | |
394 | init_timer(&new_node->timer_context.timer); | |
395 | new_node->timer_context.timer.function = mwifiex_flush_data; | |
396 | new_node->timer_context.timer.data = | |
397 | (unsigned long) &new_node->timer_context; | |
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); | |
5e6e3a92 BZ |
405 | } |
406 | ||
3a8fede1 MY |
407 | static void |
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 | ||
5e6e3a92 BZ |
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 | */ | |
572e8f3e | 431 | int mwifiex_cmd_11n_addba_req(struct host_cmd_ds_command *cmd, void *data_buf) |
5e6e3a92 | 432 | { |
2c208890 | 433 | struct host_cmd_ds_11n_addba_req *add_ba_req = &cmd->params.add_ba_req; |
5e6e3a92 BZ |
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 | */ | |
450 | int mwifiex_cmd_11n_addba_rsp_gen(struct mwifiex_private *priv, | |
451 | struct host_cmd_ds_command *cmd, | |
a5ffddb7 AK |
452 | struct host_cmd_ds_11n_addba_req |
453 | *cmd_addba_req) | |
5e6e3a92 | 454 | { |
2c208890 | 455 | struct host_cmd_ds_11n_addba_rsp *add_ba_rsp = &cmd->params.add_ba_rsp; |
b06c5321 AP |
456 | struct mwifiex_sta_node *sta_ptr; |
457 | u32 rx_win_size = priv->add_ba_param.rx_win_size; | |
270e58e8 YAP |
458 | u8 tid; |
459 | int win_size; | |
c11fb985 | 460 | unsigned long flags; |
5e6e3a92 BZ |
461 | uint16_t block_ack_param_set; |
462 | ||
b06c5321 AP |
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)) { | |
c11fb985 | 467 | spin_lock_irqsave(&priv->sta_list_spinlock, flags); |
b06c5321 AP |
468 | sta_ptr = mwifiex_get_sta_entry(priv, |
469 | cmd_addba_req->peer_mac_addr); | |
470 | if (!sta_ptr) { | |
471 | dev_warn(priv->adapter->dev, | |
472 | "BA setup with unknown TDLS peer %pM!\n", | |
473 | cmd_addba_req->peer_mac_addr); | |
c11fb985 | 474 | spin_unlock_irqrestore(&priv->sta_list_spinlock, flags); |
b06c5321 AP |
475 | return -1; |
476 | } | |
477 | if (sta_ptr->is_11ac_enabled) | |
478 | rx_win_size = MWIFIEX_11AC_STA_AMPDU_DEF_RXWINSIZE; | |
c11fb985 | 479 | spin_unlock_irqrestore(&priv->sta_list_spinlock, flags); |
b06c5321 AP |
480 | } |
481 | ||
5e6e3a92 BZ |
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; | |
4c9f9fb2 AK |
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; | |
b06c5321 | 501 | block_ack_param_set |= rx_win_size << BLOCKACKPARAM_WINSIZE_POS; |
5e6e3a92 BZ |
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, | |
84266841 YAP |
509 | tid, win_size, |
510 | le16_to_cpu(cmd_addba_req->ssn)); | |
5e6e3a92 BZ |
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 | */ | |
572e8f3e | 522 | int mwifiex_cmd_11n_delba(struct host_cmd_ds_command *cmd, void *data_buf) |
5e6e3a92 | 523 | { |
2c208890 | 524 | struct host_cmd_ds_11n_delba *del_ba = &cmd->params.del_ba; |
5e6e3a92 BZ |
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 | */ | |
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 | { | |
8c00228e | 550 | struct mwifiex_rx_reorder_tbl *tbl; |
3a8fede1 | 551 | int prev_start_win, start_win, end_win, win_size; |
270e58e8 | 552 | u16 pkt_index; |
8acbea61 | 553 | bool init_window_shift = false; |
3a8fede1 | 554 | int ret = 0; |
5e6e3a92 | 555 | |
2c208890 | 556 | tbl = mwifiex_11n_get_rx_reorder_tbl(priv, tid, ta); |
8c00228e | 557 | if (!tbl) { |
5e6e43eb AK |
558 | if (pkt_type != PKT_TYPE_BAR) |
559 | mwifiex_11n_dispatch_pkt(priv, payload); | |
3a8fede1 | 560 | return ret; |
5e6e3a92 | 561 | } |
4c9f9fb2 AK |
562 | |
563 | if ((pkt_type == PKT_TYPE_AMSDU) && !tbl->amsdu) { | |
564 | mwifiex_11n_dispatch_pkt(priv, payload); | |
3a8fede1 | 565 | return ret; |
4c9f9fb2 AK |
566 | } |
567 | ||
8c00228e | 568 | start_win = tbl->start_win; |
3a8fede1 | 569 | prev_start_win = start_win; |
8c00228e | 570 | win_size = tbl->win_size; |
5e6e3a92 | 571 | end_win = ((start_win + win_size) - 1) & (MAX_TID_VALUE - 1); |
8acbea61 PS |
572 | if (tbl->flags & RXREOR_INIT_WINDOW_SHIFT) { |
573 | init_window_shift = true; | |
574 | tbl->flags &= ~RXREOR_INIT_WINDOW_SHIFT; | |
575 | } | |
5e6e3a92 | 576 | |
2db96c3d AP |
577 | if (tbl->flags & RXREOR_FORCE_NO_DROP) { |
578 | dev_dbg(priv->adapter->dev, | |
579 | "RXREOR_FORCE_NO_DROP when HS is activated\n"); | |
580 | tbl->flags &= ~RXREOR_FORCE_NO_DROP; | |
8acbea61 PS |
581 | } else if (init_window_shift && seq_num < start_win && |
582 | seq_num >= tbl->init_win) { | |
583 | dev_dbg(priv->adapter->dev, | |
584 | "Sender TID sequence number reset %d->%d for SSN %d\n", | |
585 | start_win, seq_num, tbl->init_win); | |
586 | tbl->start_win = start_win = seq_num; | |
587 | end_win = ((start_win + win_size) - 1) & (MAX_TID_VALUE - 1); | |
2db96c3d | 588 | } else { |
8acbea61 PS |
589 | /* |
590 | * If seq_num is less then starting win then ignore and drop | |
591 | * the packet | |
592 | */ | |
2db96c3d AP |
593 | if ((start_win + TWOPOW11) > (MAX_TID_VALUE - 1)) { |
594 | if (seq_num >= ((start_win + TWOPOW11) & | |
595 | (MAX_TID_VALUE - 1)) && | |
3a8fede1 MY |
596 | seq_num < start_win) { |
597 | ret = -1; | |
598 | goto done; | |
599 | } | |
2db96c3d | 600 | } else if ((seq_num < start_win) || |
3a8fede1 MY |
601 | (seq_num >= (start_win + TWOPOW11))) { |
602 | ret = -1; | |
603 | goto done; | |
2db96c3d | 604 | } |
5e6e3a92 BZ |
605 | } |
606 | ||
607 | /* | |
608 | * If this packet is a BAR we adjust seq_num as | |
609 | * WinStart = seq_num | |
610 | */ | |
611 | if (pkt_type == PKT_TYPE_BAR) | |
612 | seq_num = ((seq_num + win_size) - 1) & (MAX_TID_VALUE - 1); | |
613 | ||
84266841 | 614 | if (((end_win < start_win) && |
2db96c3d | 615 | (seq_num < start_win) && (seq_num > end_win)) || |
84266841 YAP |
616 | ((end_win > start_win) && ((seq_num > end_win) || |
617 | (seq_num < start_win)))) { | |
5e6e3a92 BZ |
618 | end_win = seq_num; |
619 | if (((seq_num - win_size) + 1) >= 0) | |
620 | start_win = (end_win - win_size) + 1; | |
621 | else | |
622 | start_win = (MAX_TID_VALUE - (win_size - seq_num)) + 1; | |
5e6e43eb | 623 | mwifiex_11n_dispatch_pkt_until_start_win(priv, tbl, start_win); |
5e6e3a92 BZ |
624 | } |
625 | ||
626 | if (pkt_type != PKT_TYPE_BAR) { | |
627 | if (seq_num >= start_win) | |
628 | pkt_index = seq_num - start_win; | |
629 | else | |
630 | pkt_index = (seq_num+MAX_TID_VALUE) - start_win; | |
631 | ||
3a8fede1 MY |
632 | if (tbl->rx_reorder_ptr[pkt_index]) { |
633 | ret = -1; | |
634 | goto done; | |
635 | } | |
5e6e3a92 | 636 | |
8c00228e | 637 | tbl->rx_reorder_ptr[pkt_index] = payload; |
5e6e3a92 BZ |
638 | } |
639 | ||
640 | /* | |
641 | * Dispatch all packets sequentially from start_win until a | |
642 | * hole is found and adjust the start_win appropriately | |
643 | */ | |
8c00228e | 644 | mwifiex_11n_scan_and_dispatch(priv, tbl); |
5e6e3a92 | 645 | |
3a8fede1 MY |
646 | done: |
647 | if (!tbl->timer_context.timer_is_set || | |
648 | prev_start_win != tbl->start_win) | |
649 | mwifiex_11n_rxreorder_timer_restart(tbl); | |
650 | return ret; | |
5e6e3a92 BZ |
651 | } |
652 | ||
653 | /* | |
654 | * This function deletes an entry for a given TID/TA pair. | |
655 | * | |
656 | * The TID/TA are taken from del BA event body. | |
657 | */ | |
658 | void | |
3e822635 YAP |
659 | mwifiex_del_ba_tbl(struct mwifiex_private *priv, int tid, u8 *peer_mac, |
660 | u8 type, int initiator) | |
5e6e3a92 | 661 | { |
8c00228e | 662 | struct mwifiex_rx_reorder_tbl *tbl; |
5e6e3a92 BZ |
663 | struct mwifiex_tx_ba_stream_tbl *ptx_tbl; |
664 | u8 cleanup_rx_reorder_tbl; | |
665 | unsigned long flags; | |
666 | ||
667 | if (type == TYPE_DELBA_RECEIVE) | |
668 | cleanup_rx_reorder_tbl = (initiator) ? true : false; | |
669 | else | |
670 | cleanup_rx_reorder_tbl = (initiator) ? false : true; | |
671 | ||
84266841 YAP |
672 | dev_dbg(priv->adapter->dev, "event: DELBA: %pM tid=%d initiator=%d\n", |
673 | peer_mac, tid, initiator); | |
5e6e3a92 BZ |
674 | |
675 | if (cleanup_rx_reorder_tbl) { | |
8c00228e | 676 | tbl = mwifiex_11n_get_rx_reorder_tbl(priv, tid, |
5e6e3a92 | 677 | peer_mac); |
8c00228e | 678 | if (!tbl) { |
5e6e3a92 | 679 | dev_dbg(priv->adapter->dev, |
84266841 | 680 | "event: TID, TA not found in table\n"); |
5e6e3a92 BZ |
681 | return; |
682 | } | |
8c00228e | 683 | mwifiex_del_rx_reorder_entry(priv, tbl); |
5e6e3a92 | 684 | } else { |
3e822635 | 685 | ptx_tbl = mwifiex_get_ba_tbl(priv, tid, peer_mac); |
5e6e3a92 BZ |
686 | if (!ptx_tbl) { |
687 | dev_dbg(priv->adapter->dev, | |
84266841 | 688 | "event: TID, RA not found in table\n"); |
5e6e3a92 BZ |
689 | return; |
690 | } | |
691 | ||
692 | spin_lock_irqsave(&priv->tx_ba_stream_tbl_lock, flags); | |
693 | mwifiex_11n_delete_tx_ba_stream_tbl_entry(priv, ptx_tbl); | |
694 | spin_unlock_irqrestore(&priv->tx_ba_stream_tbl_lock, flags); | |
695 | } | |
696 | } | |
697 | ||
698 | /* | |
699 | * This function handles the command response of an add BA response. | |
700 | * | |
701 | * Handling includes changing the header fields into CPU format and | |
702 | * creating the stream, provided the add BA is accepted. | |
703 | */ | |
704 | int mwifiex_ret_11n_addba_resp(struct mwifiex_private *priv, | |
705 | struct host_cmd_ds_command *resp) | |
706 | { | |
2c208890 | 707 | struct host_cmd_ds_11n_addba_rsp *add_ba_rsp = &resp->params.add_ba_rsp; |
5e6e3a92 | 708 | int tid, win_size; |
8c00228e | 709 | struct mwifiex_rx_reorder_tbl *tbl; |
5e6e3a92 BZ |
710 | uint16_t block_ack_param_set; |
711 | ||
712 | block_ack_param_set = le16_to_cpu(add_ba_rsp->block_ack_param_set); | |
713 | ||
714 | tid = (block_ack_param_set & IEEE80211_ADDBA_PARAM_TID_MASK) | |
715 | >> BLOCKACKPARAM_TID_POS; | |
716 | /* | |
717 | * Check if we had rejected the ADDBA, if yes then do not create | |
718 | * the stream | |
719 | */ | |
63410c37 | 720 | if (le16_to_cpu(add_ba_rsp->status_code) != BA_RESULT_SUCCESS) { |
5e6e3a92 | 721 | dev_err(priv->adapter->dev, "ADDBA RSP: failed %pM tid=%d)\n", |
84266841 | 722 | add_ba_rsp->peer_mac_addr, tid); |
5e6e3a92 | 723 | |
8c00228e YAP |
724 | tbl = mwifiex_11n_get_rx_reorder_tbl(priv, tid, |
725 | add_ba_rsp->peer_mac_addr); | |
726 | if (tbl) | |
727 | mwifiex_del_rx_reorder_entry(priv, tbl); | |
63410c37 AK |
728 | |
729 | return 0; | |
5e6e3a92 BZ |
730 | } |
731 | ||
63410c37 AK |
732 | win_size = (block_ack_param_set & IEEE80211_ADDBA_PARAM_BUF_SIZE_MASK) |
733 | >> BLOCKACKPARAM_WINSIZE_POS; | |
734 | ||
4c9f9fb2 AK |
735 | tbl = mwifiex_11n_get_rx_reorder_tbl(priv, tid, |
736 | add_ba_rsp->peer_mac_addr); | |
737 | if (tbl) { | |
738 | if ((block_ack_param_set & BLOCKACKPARAM_AMSDU_SUPP_MASK) && | |
739 | priv->add_ba_param.rx_amsdu && | |
740 | (priv->aggr_prio_tbl[tid].amsdu != BA_STREAM_NOT_ALLOWED)) | |
741 | tbl->amsdu = true; | |
742 | else | |
743 | tbl->amsdu = false; | |
744 | } | |
745 | ||
63410c37 AK |
746 | dev_dbg(priv->adapter->dev, |
747 | "cmd: ADDBA RSP: %pM tid=%d ssn=%d win_size=%d\n", | |
748 | add_ba_rsp->peer_mac_addr, tid, add_ba_rsp->ssn, win_size); | |
749 | ||
5e6e3a92 BZ |
750 | return 0; |
751 | } | |
752 | ||
753 | /* | |
754 | * This function handles BA stream timeout event by preparing and sending | |
755 | * a command to the firmware. | |
756 | */ | |
757 | void mwifiex_11n_ba_stream_timeout(struct mwifiex_private *priv, | |
758 | struct host_cmd_ds_11n_batimeout *event) | |
759 | { | |
760 | struct host_cmd_ds_11n_delba delba; | |
761 | ||
762 | memset(&delba, 0, sizeof(struct host_cmd_ds_11n_delba)); | |
763 | memcpy(delba.peer_mac_addr, event->peer_mac_addr, ETH_ALEN); | |
764 | ||
765 | delba.del_ba_param_set |= | |
766 | cpu_to_le16((u16) event->tid << DELBA_TID_POS); | |
767 | delba.del_ba_param_set |= cpu_to_le16( | |
768 | (u16) event->origninator << DELBA_INITIATOR_POS); | |
769 | delba.reason_code = cpu_to_le16(WLAN_REASON_QSTA_TIMEOUT); | |
fa0ecbb9 | 770 | mwifiex_send_cmd(priv, HostCmd_CMD_11N_DELBA, 0, 0, &delba, false); |
5e6e3a92 BZ |
771 | } |
772 | ||
773 | /* | |
774 | * This function cleans up the Rx reorder table by deleting all the entries | |
775 | * and re-initializing. | |
776 | */ | |
777 | void mwifiex_11n_cleanup_reorder_tbl(struct mwifiex_private *priv) | |
778 | { | |
779 | struct mwifiex_rx_reorder_tbl *del_tbl_ptr, *tmp_node; | |
780 | unsigned long flags; | |
781 | ||
782 | spin_lock_irqsave(&priv->rx_reorder_tbl_lock, flags); | |
783 | list_for_each_entry_safe(del_tbl_ptr, tmp_node, | |
784 | &priv->rx_reorder_tbl_ptr, list) { | |
785 | spin_unlock_irqrestore(&priv->rx_reorder_tbl_lock, flags); | |
8c00228e | 786 | mwifiex_del_rx_reorder_entry(priv, del_tbl_ptr); |
5e6e3a92 BZ |
787 | spin_lock_irqsave(&priv->rx_reorder_tbl_lock, flags); |
788 | } | |
2d702830 | 789 | INIT_LIST_HEAD(&priv->rx_reorder_tbl_ptr); |
5e6e3a92 BZ |
790 | spin_unlock_irqrestore(&priv->rx_reorder_tbl_lock, flags); |
791 | ||
92583924 | 792 | mwifiex_reset_11n_rx_seq_num(priv); |
5e6e3a92 | 793 | } |
2db96c3d AP |
794 | |
795 | /* | |
796 | * This function updates all rx_reorder_tbl's flags. | |
797 | */ | |
798 | void mwifiex_update_rxreor_flags(struct mwifiex_adapter *adapter, u8 flags) | |
799 | { | |
800 | struct mwifiex_private *priv; | |
801 | struct mwifiex_rx_reorder_tbl *tbl; | |
802 | unsigned long lock_flags; | |
803 | int i; | |
804 | ||
805 | for (i = 0; i < adapter->priv_num; i++) { | |
806 | priv = adapter->priv[i]; | |
807 | if (!priv) | |
808 | continue; | |
2db96c3d AP |
809 | |
810 | spin_lock_irqsave(&priv->rx_reorder_tbl_lock, lock_flags); | |
2d702830 AK |
811 | if (list_empty(&priv->rx_reorder_tbl_ptr)) { |
812 | spin_unlock_irqrestore(&priv->rx_reorder_tbl_lock, | |
813 | lock_flags); | |
814 | continue; | |
815 | } | |
816 | ||
2db96c3d AP |
817 | list_for_each_entry(tbl, &priv->rx_reorder_tbl_ptr, list) |
818 | tbl->flags = flags; | |
819 | spin_unlock_irqrestore(&priv->rx_reorder_tbl_lock, lock_flags); | |
820 | } | |
821 | ||
822 | return; | |
823 | } |