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5e6e3a92 BZ |
1 | /* |
2 | * Marvell Wireless LAN device driver: WMM | |
3 | * | |
4 | * Copyright (C) 2011, 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 | ||
28 | ||
29 | /* Maximum value FW can accept for driver delay in packet transmission */ | |
30 | #define DRV_PKT_DELAY_TO_FW_MAX 512 | |
31 | ||
32 | ||
33 | #define WMM_QUEUED_PACKET_LOWER_LIMIT 180 | |
34 | ||
35 | #define WMM_QUEUED_PACKET_UPPER_LIMIT 200 | |
36 | ||
37 | /* Offset for TOS field in the IP header */ | |
38 | #define IPTOS_OFFSET 5 | |
39 | ||
40 | /* WMM information IE */ | |
41 | static const u8 wmm_info_ie[] = { WLAN_EID_VENDOR_SPECIFIC, 0x07, | |
42 | 0x00, 0x50, 0xf2, 0x02, | |
43 | 0x00, 0x01, 0x00 | |
44 | }; | |
45 | ||
46 | static const u8 wmm_aci_to_qidx_map[] = { WMM_AC_BE, | |
47 | WMM_AC_BK, | |
48 | WMM_AC_VI, | |
49 | WMM_AC_VO | |
50 | }; | |
51 | ||
52 | static u8 tos_to_tid[] = { | |
53 | /* TID DSCP_P2 DSCP_P1 DSCP_P0 WMM_AC */ | |
54 | 0x01, /* 0 1 0 AC_BK */ | |
55 | 0x02, /* 0 0 0 AC_BK */ | |
56 | 0x00, /* 0 0 1 AC_BE */ | |
57 | 0x03, /* 0 1 1 AC_BE */ | |
58 | 0x04, /* 1 0 0 AC_VI */ | |
59 | 0x05, /* 1 0 1 AC_VI */ | |
60 | 0x06, /* 1 1 0 AC_VO */ | |
61 | 0x07 /* 1 1 1 AC_VO */ | |
62 | }; | |
63 | ||
64 | /* | |
65 | * This table inverses the tos_to_tid operation to get a priority | |
66 | * which is in sequential order, and can be compared. | |
67 | * Use this to compare the priority of two different TIDs. | |
68 | */ | |
69 | static u8 tos_to_tid_inv[] = { | |
70 | 0x02, /* from tos_to_tid[2] = 0 */ | |
71 | 0x00, /* from tos_to_tid[0] = 1 */ | |
72 | 0x01, /* from tos_to_tid[1] = 2 */ | |
73 | 0x03, | |
74 | 0x04, | |
75 | 0x05, | |
76 | 0x06, | |
77 | 0x07}; | |
78 | ||
79 | static u8 ac_to_tid[4][2] = { {1, 2}, {0, 3}, {4, 5}, {6, 7} }; | |
80 | ||
81 | /* | |
82 | * This function debug prints the priority parameters for a WMM AC. | |
83 | */ | |
84 | static void | |
85 | mwifiex_wmm_ac_debug_print(const struct ieee_types_wmm_ac_parameters *ac_param) | |
86 | { | |
87 | const char *ac_str[] = { "BK", "BE", "VI", "VO" }; | |
88 | ||
89 | pr_debug("info: WMM AC_%s: ACI=%d, ACM=%d, Aifsn=%d, " | |
c65a30f3 YAP |
90 | "EcwMin=%d, EcwMax=%d, TxopLimit=%d\n", |
91 | ac_str[wmm_aci_to_qidx_map[(ac_param->aci_aifsn_bitmap | |
92 | & MWIFIEX_ACI) >> 5]], | |
93 | (ac_param->aci_aifsn_bitmap & MWIFIEX_ACI) >> 5, | |
94 | (ac_param->aci_aifsn_bitmap & MWIFIEX_ACM) >> 4, | |
95 | ac_param->aci_aifsn_bitmap & MWIFIEX_AIFSN, | |
96 | ac_param->ecw_bitmap & MWIFIEX_ECW_MIN, | |
97 | (ac_param->ecw_bitmap & MWIFIEX_ECW_MAX) >> 4, | |
98 | le16_to_cpu(ac_param->tx_op_limit)); | |
5e6e3a92 BZ |
99 | } |
100 | ||
101 | /* | |
102 | * This function allocates a route address list. | |
103 | * | |
104 | * The function also initializes the list with the provided RA. | |
105 | */ | |
106 | static struct mwifiex_ra_list_tbl * | |
107 | mwifiex_wmm_allocate_ralist_node(struct mwifiex_adapter *adapter, u8 *ra) | |
108 | { | |
109 | struct mwifiex_ra_list_tbl *ra_list; | |
110 | ||
111 | ra_list = kzalloc(sizeof(struct mwifiex_ra_list_tbl), GFP_ATOMIC); | |
0d2e7a5c | 112 | if (!ra_list) |
5e6e3a92 | 113 | return NULL; |
0d2e7a5c | 114 | |
5e6e3a92 BZ |
115 | INIT_LIST_HEAD(&ra_list->list); |
116 | skb_queue_head_init(&ra_list->skb_head); | |
117 | ||
118 | memcpy(ra_list->ra, ra, ETH_ALEN); | |
119 | ||
120 | ra_list->total_pkts_size = 0; | |
121 | ||
122 | dev_dbg(adapter->dev, "info: allocated ra_list %p\n", ra_list); | |
123 | ||
124 | return ra_list; | |
125 | } | |
126 | ||
5a009adf AP |
127 | /* This function returns random no between 16 and 32 to be used as threshold |
128 | * for no of packets after which BA setup is initiated. | |
129 | */ | |
130 | static u8 mwifiex_get_random_ba_threshold(void) | |
131 | { | |
132 | u32 sec, usec; | |
133 | struct timeval ba_tstamp; | |
134 | u8 ba_threshold; | |
135 | ||
136 | /* setup ba_packet_threshold here random number between | |
137 | * [BA_SETUP_PACKET_OFFSET, | |
138 | * BA_SETUP_PACKET_OFFSET+BA_SETUP_MAX_PACKET_THRESHOLD-1] | |
139 | */ | |
140 | ||
141 | do_gettimeofday(&ba_tstamp); | |
142 | sec = (ba_tstamp.tv_sec & 0xFFFF) + (ba_tstamp.tv_sec >> 16); | |
143 | usec = (ba_tstamp.tv_usec & 0xFFFF) + (ba_tstamp.tv_usec >> 16); | |
144 | ba_threshold = (((sec << 16) + usec) % BA_SETUP_MAX_PACKET_THRESHOLD) | |
145 | + BA_SETUP_PACKET_OFFSET; | |
146 | ||
147 | return ba_threshold; | |
148 | } | |
149 | ||
5e6e3a92 BZ |
150 | /* |
151 | * This function allocates and adds a RA list for all TIDs | |
152 | * with the given RA. | |
153 | */ | |
154 | void | |
155 | mwifiex_ralist_add(struct mwifiex_private *priv, u8 *ra) | |
156 | { | |
157 | int i; | |
158 | struct mwifiex_ra_list_tbl *ra_list; | |
159 | struct mwifiex_adapter *adapter = priv->adapter; | |
5a009adf AP |
160 | struct mwifiex_sta_node *node; |
161 | unsigned long flags; | |
162 | ||
163 | spin_lock_irqsave(&priv->sta_list_spinlock, flags); | |
164 | node = mwifiex_get_sta_entry(priv, ra); | |
165 | spin_unlock_irqrestore(&priv->sta_list_spinlock, flags); | |
5e6e3a92 BZ |
166 | |
167 | for (i = 0; i < MAX_NUM_TID; ++i) { | |
168 | ra_list = mwifiex_wmm_allocate_ralist_node(adapter, ra); | |
169 | dev_dbg(adapter->dev, "info: created ra_list %p\n", ra_list); | |
170 | ||
171 | if (!ra_list) | |
172 | break; | |
173 | ||
5a009adf AP |
174 | ra_list->is_11n_enabled = 0; |
175 | if (!mwifiex_queuing_ra_based(priv)) { | |
5e6e3a92 | 176 | ra_list->is_11n_enabled = IS_11N_ENABLED(priv); |
5a009adf AP |
177 | } else { |
178 | ra_list->is_11n_enabled = | |
179 | mwifiex_is_sta_11n_enabled(priv, node); | |
180 | if (ra_list->is_11n_enabled) | |
181 | ra_list->max_amsdu = node->max_amsdu; | |
182 | } | |
5e6e3a92 BZ |
183 | |
184 | dev_dbg(adapter->dev, "data: ralist %p: is_11n_enabled=%d\n", | |
185 | ra_list, ra_list->is_11n_enabled); | |
186 | ||
5a009adf AP |
187 | if (ra_list->is_11n_enabled) { |
188 | ra_list->pkt_count = 0; | |
189 | ra_list->ba_packet_thr = | |
190 | mwifiex_get_random_ba_threshold(); | |
191 | } | |
5e6e3a92 | 192 | list_add_tail(&ra_list->list, |
c65a30f3 | 193 | &priv->wmm.tid_tbl_ptr[i].ra_list); |
5e6e3a92 BZ |
194 | } |
195 | } | |
196 | ||
197 | /* | |
198 | * This function sets the WMM queue priorities to their default values. | |
199 | */ | |
200 | static void mwifiex_wmm_default_queue_priorities(struct mwifiex_private *priv) | |
201 | { | |
202 | /* Default queue priorities: VO->VI->BE->BK */ | |
203 | priv->wmm.queue_priority[0] = WMM_AC_VO; | |
204 | priv->wmm.queue_priority[1] = WMM_AC_VI; | |
205 | priv->wmm.queue_priority[2] = WMM_AC_BE; | |
206 | priv->wmm.queue_priority[3] = WMM_AC_BK; | |
207 | } | |
208 | ||
209 | /* | |
210 | * This function map ACs to TIDs. | |
211 | */ | |
212 | static void | |
49729ff6 | 213 | mwifiex_wmm_queue_priorities_tid(struct mwifiex_wmm_desc *wmm) |
5e6e3a92 | 214 | { |
49729ff6 | 215 | u8 *queue_priority = wmm->queue_priority; |
5e6e3a92 BZ |
216 | int i; |
217 | ||
218 | for (i = 0; i < 4; ++i) { | |
219 | tos_to_tid[7 - (i * 2)] = ac_to_tid[queue_priority[i]][1]; | |
220 | tos_to_tid[6 - (i * 2)] = ac_to_tid[queue_priority[i]][0]; | |
221 | } | |
49729ff6 MY |
222 | |
223 | for (i = 0; i < MAX_NUM_TID; ++i) | |
224 | tos_to_tid_inv[tos_to_tid[i]] = (u8)i; | |
225 | ||
226 | atomic_set(&wmm->highest_queued_prio, HIGH_PRIO_TID); | |
5e6e3a92 BZ |
227 | } |
228 | ||
229 | /* | |
230 | * This function initializes WMM priority queues. | |
231 | */ | |
232 | void | |
233 | mwifiex_wmm_setup_queue_priorities(struct mwifiex_private *priv, | |
234 | struct ieee_types_wmm_parameter *wmm_ie) | |
235 | { | |
236 | u16 cw_min, avg_back_off, tmp[4]; | |
237 | u32 i, j, num_ac; | |
238 | u8 ac_idx; | |
239 | ||
240 | if (!wmm_ie || !priv->wmm_enabled) { | |
241 | /* WMM is not enabled, just set the defaults and return */ | |
242 | mwifiex_wmm_default_queue_priorities(priv); | |
243 | return; | |
244 | } | |
245 | ||
246 | dev_dbg(priv->adapter->dev, "info: WMM Parameter IE: version=%d, " | |
247 | "qos_info Parameter Set Count=%d, Reserved=%#x\n", | |
248 | wmm_ie->vend_hdr.version, wmm_ie->qos_info_bitmap & | |
249 | IEEE80211_WMM_IE_AP_QOSINFO_PARAM_SET_CNT_MASK, | |
250 | wmm_ie->reserved); | |
251 | ||
252 | for (num_ac = 0; num_ac < ARRAY_SIZE(wmm_ie->ac_params); num_ac++) { | |
c65a30f3 YAP |
253 | u8 ecw = wmm_ie->ac_params[num_ac].ecw_bitmap; |
254 | u8 aci_aifsn = wmm_ie->ac_params[num_ac].aci_aifsn_bitmap; | |
255 | cw_min = (1 << (ecw & MWIFIEX_ECW_MIN)) - 1; | |
256 | avg_back_off = (cw_min >> 1) + (aci_aifsn & MWIFIEX_AIFSN); | |
257 | ||
258 | ac_idx = wmm_aci_to_qidx_map[(aci_aifsn & MWIFIEX_ACI) >> 5]; | |
5e6e3a92 BZ |
259 | priv->wmm.queue_priority[ac_idx] = ac_idx; |
260 | tmp[ac_idx] = avg_back_off; | |
261 | ||
c65a30f3 YAP |
262 | dev_dbg(priv->adapter->dev, |
263 | "info: WMM: CWmax=%d CWmin=%d Avg Back-off=%d\n", | |
264 | (1 << ((ecw & MWIFIEX_ECW_MAX) >> 4)) - 1, | |
265 | cw_min, avg_back_off); | |
5e6e3a92 BZ |
266 | mwifiex_wmm_ac_debug_print(&wmm_ie->ac_params[num_ac]); |
267 | } | |
268 | ||
269 | /* Bubble sort */ | |
270 | for (i = 0; i < num_ac; i++) { | |
271 | for (j = 1; j < num_ac - i; j++) { | |
272 | if (tmp[j - 1] > tmp[j]) { | |
273 | swap(tmp[j - 1], tmp[j]); | |
274 | swap(priv->wmm.queue_priority[j - 1], | |
275 | priv->wmm.queue_priority[j]); | |
276 | } else if (tmp[j - 1] == tmp[j]) { | |
277 | if (priv->wmm.queue_priority[j - 1] | |
278 | < priv->wmm.queue_priority[j]) | |
279 | swap(priv->wmm.queue_priority[j - 1], | |
280 | priv->wmm.queue_priority[j]); | |
281 | } | |
282 | } | |
283 | } | |
284 | ||
49729ff6 | 285 | mwifiex_wmm_queue_priorities_tid(&priv->wmm); |
5e6e3a92 BZ |
286 | } |
287 | ||
288 | /* | |
289 | * This function evaluates whether or not an AC is to be downgraded. | |
290 | * | |
291 | * In case the AC is not enabled, the highest AC is returned that is | |
292 | * enabled and does not require admission control. | |
293 | */ | |
294 | static enum mwifiex_wmm_ac_e | |
295 | mwifiex_wmm_eval_downgrade_ac(struct mwifiex_private *priv, | |
296 | enum mwifiex_wmm_ac_e eval_ac) | |
297 | { | |
298 | int down_ac; | |
299 | enum mwifiex_wmm_ac_e ret_ac; | |
300 | struct mwifiex_wmm_ac_status *ac_status; | |
301 | ||
302 | ac_status = &priv->wmm.ac_status[eval_ac]; | |
303 | ||
304 | if (!ac_status->disabled) | |
305 | /* Okay to use this AC, its enabled */ | |
306 | return eval_ac; | |
307 | ||
308 | /* Setup a default return value of the lowest priority */ | |
309 | ret_ac = WMM_AC_BK; | |
310 | ||
311 | /* | |
312 | * Find the highest AC that is enabled and does not require | |
313 | * admission control. The spec disallows downgrading to an AC, | |
314 | * which is enabled due to a completed admission control. | |
315 | * Unadmitted traffic is not to be sent on an AC with admitted | |
316 | * traffic. | |
317 | */ | |
318 | for (down_ac = WMM_AC_BK; down_ac < eval_ac; down_ac++) { | |
319 | ac_status = &priv->wmm.ac_status[down_ac]; | |
320 | ||
321 | if (!ac_status->disabled && !ac_status->flow_required) | |
322 | /* AC is enabled and does not require admission | |
323 | control */ | |
324 | ret_ac = (enum mwifiex_wmm_ac_e) down_ac; | |
325 | } | |
326 | ||
327 | return ret_ac; | |
328 | } | |
329 | ||
330 | /* | |
331 | * This function downgrades WMM priority queue. | |
332 | */ | |
333 | void | |
334 | mwifiex_wmm_setup_ac_downgrade(struct mwifiex_private *priv) | |
335 | { | |
336 | int ac_val; | |
337 | ||
338 | dev_dbg(priv->adapter->dev, "info: WMM: AC Priorities:" | |
339 | "BK(0), BE(1), VI(2), VO(3)\n"); | |
340 | ||
341 | if (!priv->wmm_enabled) { | |
342 | /* WMM is not enabled, default priorities */ | |
343 | for (ac_val = WMM_AC_BK; ac_val <= WMM_AC_VO; ac_val++) | |
344 | priv->wmm.ac_down_graded_vals[ac_val] = | |
c65a30f3 | 345 | (enum mwifiex_wmm_ac_e) ac_val; |
5e6e3a92 BZ |
346 | } else { |
347 | for (ac_val = WMM_AC_BK; ac_val <= WMM_AC_VO; ac_val++) { | |
348 | priv->wmm.ac_down_graded_vals[ac_val] | |
349 | = mwifiex_wmm_eval_downgrade_ac(priv, | |
350 | (enum mwifiex_wmm_ac_e) ac_val); | |
c65a30f3 YAP |
351 | dev_dbg(priv->adapter->dev, |
352 | "info: WMM: AC PRIO %d maps to %d\n", | |
5e6e3a92 BZ |
353 | ac_val, priv->wmm.ac_down_graded_vals[ac_val]); |
354 | } | |
355 | } | |
356 | } | |
357 | ||
358 | /* | |
359 | * This function converts the IP TOS field to an WMM AC | |
360 | * Queue assignment. | |
361 | */ | |
362 | static enum mwifiex_wmm_ac_e | |
363 | mwifiex_wmm_convert_tos_to_ac(struct mwifiex_adapter *adapter, u32 tos) | |
364 | { | |
365 | /* Map of TOS UP values to WMM AC */ | |
366 | const enum mwifiex_wmm_ac_e tos_to_ac[] = { WMM_AC_BE, | |
367 | WMM_AC_BK, | |
368 | WMM_AC_BK, | |
369 | WMM_AC_BE, | |
370 | WMM_AC_VI, | |
371 | WMM_AC_VI, | |
372 | WMM_AC_VO, | |
373 | WMM_AC_VO | |
374 | }; | |
375 | ||
376 | if (tos >= ARRAY_SIZE(tos_to_ac)) | |
377 | return WMM_AC_BE; | |
378 | ||
379 | return tos_to_ac[tos]; | |
380 | } | |
381 | ||
382 | /* | |
383 | * This function evaluates a given TID and downgrades it to a lower | |
384 | * TID if the WMM Parameter IE received from the AP indicates that the | |
385 | * AP is disabled (due to call admission control (ACM bit). Mapping | |
386 | * of TID to AC is taken care of internally. | |
387 | */ | |
388 | static u8 | |
389 | mwifiex_wmm_downgrade_tid(struct mwifiex_private *priv, u32 tid) | |
390 | { | |
391 | enum mwifiex_wmm_ac_e ac, ac_down; | |
392 | u8 new_tid; | |
393 | ||
394 | ac = mwifiex_wmm_convert_tos_to_ac(priv->adapter, tid); | |
395 | ac_down = priv->wmm.ac_down_graded_vals[ac]; | |
396 | ||
397 | /* Send the index to tid array, picking from the array will be | |
398 | * taken care by dequeuing function | |
399 | */ | |
400 | new_tid = ac_to_tid[ac_down][tid % 2]; | |
401 | ||
402 | return new_tid; | |
403 | } | |
404 | ||
405 | /* | |
406 | * This function initializes the WMM state information and the | |
407 | * WMM data path queues. | |
408 | */ | |
409 | void | |
410 | mwifiex_wmm_init(struct mwifiex_adapter *adapter) | |
411 | { | |
412 | int i, j; | |
413 | struct mwifiex_private *priv; | |
414 | ||
415 | for (j = 0; j < adapter->priv_num; ++j) { | |
416 | priv = adapter->priv[j]; | |
417 | if (!priv) | |
418 | continue; | |
419 | ||
420 | for (i = 0; i < MAX_NUM_TID; ++i) { | |
421 | priv->aggr_prio_tbl[i].amsdu = tos_to_tid_inv[i]; | |
422 | priv->aggr_prio_tbl[i].ampdu_ap = tos_to_tid_inv[i]; | |
423 | priv->aggr_prio_tbl[i].ampdu_user = tos_to_tid_inv[i]; | |
5e6e3a92 BZ |
424 | } |
425 | ||
426 | priv->aggr_prio_tbl[6].amsdu | |
c65a30f3 YAP |
427 | = priv->aggr_prio_tbl[6].ampdu_ap |
428 | = priv->aggr_prio_tbl[6].ampdu_user | |
429 | = BA_STREAM_NOT_ALLOWED; | |
5e6e3a92 BZ |
430 | |
431 | priv->aggr_prio_tbl[7].amsdu = priv->aggr_prio_tbl[7].ampdu_ap | |
c65a30f3 YAP |
432 | = priv->aggr_prio_tbl[7].ampdu_user |
433 | = BA_STREAM_NOT_ALLOWED; | |
5e6e3a92 | 434 | |
04abc0a3 | 435 | mwifiex_set_ba_params(priv); |
92583924 SP |
436 | mwifiex_reset_11n_rx_seq_num(priv); |
437 | ||
f699254c | 438 | atomic_set(&priv->wmm.tx_pkts_queued, 0); |
49729ff6 | 439 | atomic_set(&priv->wmm.highest_queued_prio, HIGH_PRIO_TID); |
5e6e3a92 BZ |
440 | } |
441 | } | |
442 | ||
443 | /* | |
444 | * This function checks if WMM Tx queue is empty. | |
445 | */ | |
446 | int | |
447 | mwifiex_wmm_lists_empty(struct mwifiex_adapter *adapter) | |
448 | { | |
f699254c | 449 | int i; |
5e6e3a92 BZ |
450 | struct mwifiex_private *priv; |
451 | ||
f699254c MY |
452 | for (i = 0; i < adapter->priv_num; ++i) { |
453 | priv = adapter->priv[i]; | |
454 | if (priv && atomic_read(&priv->wmm.tx_pkts_queued)) | |
a8aa69dc | 455 | return false; |
5e6e3a92 BZ |
456 | } |
457 | ||
458 | return true; | |
459 | } | |
460 | ||
461 | /* | |
462 | * This function deletes all packets in an RA list node. | |
463 | * | |
464 | * The packet sent completion callback handler are called with | |
465 | * status failure, after they are dequeued to ensure proper | |
466 | * cleanup. The RA list node itself is freed at the end. | |
467 | */ | |
468 | static void | |
469 | mwifiex_wmm_del_pkts_in_ralist_node(struct mwifiex_private *priv, | |
470 | struct mwifiex_ra_list_tbl *ra_list) | |
471 | { | |
472 | struct mwifiex_adapter *adapter = priv->adapter; | |
473 | struct sk_buff *skb, *tmp; | |
474 | ||
475 | skb_queue_walk_safe(&ra_list->skb_head, skb, tmp) | |
47411a06 | 476 | mwifiex_write_data_complete(adapter, skb, 0, -1); |
5e6e3a92 BZ |
477 | } |
478 | ||
479 | /* | |
480 | * This function deletes all packets in an RA list. | |
481 | * | |
482 | * Each nodes in the RA list are freed individually first, and then | |
483 | * the RA list itself is freed. | |
484 | */ | |
485 | static void | |
486 | mwifiex_wmm_del_pkts_in_ralist(struct mwifiex_private *priv, | |
487 | struct list_head *ra_list_head) | |
488 | { | |
489 | struct mwifiex_ra_list_tbl *ra_list; | |
490 | ||
491 | list_for_each_entry(ra_list, ra_list_head, list) | |
492 | mwifiex_wmm_del_pkts_in_ralist_node(priv, ra_list); | |
493 | } | |
494 | ||
495 | /* | |
496 | * This function deletes all packets in all RA lists. | |
497 | */ | |
498 | static void mwifiex_wmm_cleanup_queues(struct mwifiex_private *priv) | |
499 | { | |
500 | int i; | |
501 | ||
502 | for (i = 0; i < MAX_NUM_TID; i++) | |
503 | mwifiex_wmm_del_pkts_in_ralist(priv, &priv->wmm.tid_tbl_ptr[i]. | |
c65a30f3 | 504 | ra_list); |
f699254c MY |
505 | |
506 | atomic_set(&priv->wmm.tx_pkts_queued, 0); | |
49729ff6 | 507 | atomic_set(&priv->wmm.highest_queued_prio, HIGH_PRIO_TID); |
5e6e3a92 BZ |
508 | } |
509 | ||
510 | /* | |
511 | * This function deletes all route addresses from all RA lists. | |
512 | */ | |
513 | static void mwifiex_wmm_delete_all_ralist(struct mwifiex_private *priv) | |
514 | { | |
515 | struct mwifiex_ra_list_tbl *ra_list, *tmp_node; | |
516 | int i; | |
517 | ||
518 | for (i = 0; i < MAX_NUM_TID; ++i) { | |
519 | dev_dbg(priv->adapter->dev, | |
c65a30f3 | 520 | "info: ra_list: freeing buf for tid %d\n", i); |
5e6e3a92 | 521 | list_for_each_entry_safe(ra_list, tmp_node, |
c65a30f3 YAP |
522 | &priv->wmm.tid_tbl_ptr[i].ra_list, |
523 | list) { | |
5e6e3a92 BZ |
524 | list_del(&ra_list->list); |
525 | kfree(ra_list); | |
526 | } | |
527 | ||
528 | INIT_LIST_HEAD(&priv->wmm.tid_tbl_ptr[i].ra_list); | |
5e6e3a92 BZ |
529 | } |
530 | } | |
531 | ||
532 | /* | |
533 | * This function cleans up the Tx and Rx queues. | |
534 | * | |
535 | * Cleanup includes - | |
536 | * - All packets in RA lists | |
537 | * - All entries in Rx reorder table | |
538 | * - All entries in Tx BA stream table | |
539 | * - MPA buffer (if required) | |
540 | * - All RA lists | |
541 | */ | |
542 | void | |
543 | mwifiex_clean_txrx(struct mwifiex_private *priv) | |
544 | { | |
545 | unsigned long flags; | |
546 | ||
547 | mwifiex_11n_cleanup_reorder_tbl(priv); | |
548 | spin_lock_irqsave(&priv->wmm.ra_list_spinlock, flags); | |
549 | ||
550 | mwifiex_wmm_cleanup_queues(priv); | |
551 | mwifiex_11n_delete_all_tx_ba_stream_tbl(priv); | |
552 | ||
553 | if (priv->adapter->if_ops.cleanup_mpa_buf) | |
554 | priv->adapter->if_ops.cleanup_mpa_buf(priv->adapter); | |
555 | ||
556 | mwifiex_wmm_delete_all_ralist(priv); | |
557 | memcpy(tos_to_tid, ac_to_tid, sizeof(tos_to_tid)); | |
558 | ||
fbd7e7ac AP |
559 | if (priv->adapter->if_ops.clean_pcie_ring) |
560 | priv->adapter->if_ops.clean_pcie_ring(priv->adapter); | |
5e6e3a92 BZ |
561 | spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, flags); |
562 | } | |
563 | ||
564 | /* | |
565 | * This function retrieves a particular RA list node, matching with the | |
566 | * given TID and RA address. | |
567 | */ | |
568 | static struct mwifiex_ra_list_tbl * | |
569 | mwifiex_wmm_get_ralist_node(struct mwifiex_private *priv, u8 tid, | |
570 | u8 *ra_addr) | |
571 | { | |
572 | struct mwifiex_ra_list_tbl *ra_list; | |
573 | ||
574 | list_for_each_entry(ra_list, &priv->wmm.tid_tbl_ptr[tid].ra_list, | |
575 | list) { | |
576 | if (!memcmp(ra_list->ra, ra_addr, ETH_ALEN)) | |
577 | return ra_list; | |
578 | } | |
579 | ||
580 | return NULL; | |
581 | } | |
582 | ||
583 | /* | |
584 | * This function retrieves an RA list node for a given TID and | |
585 | * RA address pair. | |
586 | * | |
587 | * If no such node is found, a new node is added first and then | |
588 | * retrieved. | |
589 | */ | |
590 | static struct mwifiex_ra_list_tbl * | |
591 | mwifiex_wmm_get_queue_raptr(struct mwifiex_private *priv, u8 tid, u8 *ra_addr) | |
592 | { | |
593 | struct mwifiex_ra_list_tbl *ra_list; | |
594 | ||
595 | ra_list = mwifiex_wmm_get_ralist_node(priv, tid, ra_addr); | |
596 | if (ra_list) | |
597 | return ra_list; | |
598 | mwifiex_ralist_add(priv, ra_addr); | |
599 | ||
600 | return mwifiex_wmm_get_ralist_node(priv, tid, ra_addr); | |
601 | } | |
602 | ||
603 | /* | |
604 | * This function checks if a particular RA list node exists in a given TID | |
605 | * table index. | |
606 | */ | |
607 | int | |
608 | mwifiex_is_ralist_valid(struct mwifiex_private *priv, | |
609 | struct mwifiex_ra_list_tbl *ra_list, int ptr_index) | |
610 | { | |
611 | struct mwifiex_ra_list_tbl *rlist; | |
612 | ||
613 | list_for_each_entry(rlist, &priv->wmm.tid_tbl_ptr[ptr_index].ra_list, | |
614 | list) { | |
615 | if (rlist == ra_list) | |
616 | return true; | |
617 | } | |
618 | ||
619 | return false; | |
620 | } | |
621 | ||
622 | /* | |
623 | * This function adds a packet to WMM queue. | |
624 | * | |
625 | * In disconnected state the packet is immediately dropped and the | |
626 | * packet send completion callback is called with status failure. | |
627 | * | |
628 | * Otherwise, the correct RA list node is located and the packet | |
629 | * is queued at the list tail. | |
630 | */ | |
631 | void | |
2690e1bb | 632 | mwifiex_wmm_add_buf_txqueue(struct mwifiex_private *priv, |
5e6e3a92 BZ |
633 | struct sk_buff *skb) |
634 | { | |
2690e1bb | 635 | struct mwifiex_adapter *adapter = priv->adapter; |
5e6e3a92 BZ |
636 | u32 tid; |
637 | struct mwifiex_ra_list_tbl *ra_list; | |
638 | u8 ra[ETH_ALEN], tid_down; | |
639 | unsigned long flags; | |
640 | ||
e39faa73 | 641 | if (!priv->media_connected && !mwifiex_is_skb_mgmt_frame(skb)) { |
5e6e3a92 | 642 | dev_dbg(adapter->dev, "data: drop packet in disconnect\n"); |
47411a06 | 643 | mwifiex_write_data_complete(adapter, skb, 0, -1); |
5e6e3a92 BZ |
644 | return; |
645 | } | |
646 | ||
647 | tid = skb->priority; | |
648 | ||
649 | spin_lock_irqsave(&priv->wmm.ra_list_spinlock, flags); | |
650 | ||
651 | tid_down = mwifiex_wmm_downgrade_tid(priv, tid); | |
652 | ||
653 | /* In case of infra as we have already created the list during | |
654 | association we just don't have to call get_queue_raptr, we will | |
655 | have only 1 raptr for a tid in case of infra */ | |
e39faa73 SP |
656 | if (!mwifiex_queuing_ra_based(priv) && |
657 | !mwifiex_is_skb_mgmt_frame(skb)) { | |
5e6e3a92 BZ |
658 | if (!list_empty(&priv->wmm.tid_tbl_ptr[tid_down].ra_list)) |
659 | ra_list = list_first_entry( | |
660 | &priv->wmm.tid_tbl_ptr[tid_down].ra_list, | |
661 | struct mwifiex_ra_list_tbl, list); | |
662 | else | |
663 | ra_list = NULL; | |
664 | } else { | |
665 | memcpy(ra, skb->data, ETH_ALEN); | |
e39faa73 | 666 | if (ra[0] & 0x01 || mwifiex_is_skb_mgmt_frame(skb)) |
4e3c4420 | 667 | memset(ra, 0xff, ETH_ALEN); |
5e6e3a92 BZ |
668 | ra_list = mwifiex_wmm_get_queue_raptr(priv, tid_down, ra); |
669 | } | |
670 | ||
671 | if (!ra_list) { | |
672 | spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, flags); | |
47411a06 | 673 | mwifiex_write_data_complete(adapter, skb, 0, -1); |
5e6e3a92 BZ |
674 | return; |
675 | } | |
676 | ||
677 | skb_queue_tail(&ra_list->skb_head, skb); | |
678 | ||
679 | ra_list->total_pkts_size += skb->len; | |
5a009adf | 680 | ra_list->pkt_count++; |
5e6e3a92 | 681 | |
49729ff6 MY |
682 | if (atomic_read(&priv->wmm.highest_queued_prio) < |
683 | tos_to_tid_inv[tid_down]) | |
684 | atomic_set(&priv->wmm.highest_queued_prio, | |
c65a30f3 | 685 | tos_to_tid_inv[tid_down]); |
49729ff6 | 686 | |
2716fd7d AF |
687 | atomic_inc(&priv->wmm.tx_pkts_queued); |
688 | ||
5e6e3a92 BZ |
689 | spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, flags); |
690 | } | |
691 | ||
692 | /* | |
693 | * This function processes the get WMM status command response from firmware. | |
694 | * | |
695 | * The response may contain multiple TLVs - | |
696 | * - AC Queue status TLVs | |
697 | * - Current WMM Parameter IE TLV | |
698 | * - Admission Control action frame TLVs | |
699 | * | |
700 | * This function parses the TLVs and then calls further specific functions | |
701 | * to process any changes in the queue prioritize or state. | |
702 | */ | |
703 | int mwifiex_ret_wmm_get_status(struct mwifiex_private *priv, | |
704 | const struct host_cmd_ds_command *resp) | |
705 | { | |
706 | u8 *curr = (u8 *) &resp->params.get_wmm_status; | |
707 | uint16_t resp_len = le16_to_cpu(resp->size), tlv_len; | |
708 | int valid = true; | |
709 | ||
710 | struct mwifiex_ie_types_data *tlv_hdr; | |
711 | struct mwifiex_ie_types_wmm_queue_status *tlv_wmm_qstatus; | |
712 | struct ieee_types_wmm_parameter *wmm_param_ie = NULL; | |
713 | struct mwifiex_wmm_ac_status *ac_status; | |
714 | ||
715 | dev_dbg(priv->adapter->dev, "info: WMM: WMM_GET_STATUS cmdresp received: %d\n", | |
c65a30f3 | 716 | resp_len); |
5e6e3a92 BZ |
717 | |
718 | while ((resp_len >= sizeof(tlv_hdr->header)) && valid) { | |
719 | tlv_hdr = (struct mwifiex_ie_types_data *) curr; | |
720 | tlv_len = le16_to_cpu(tlv_hdr->header.len); | |
721 | ||
722 | switch (le16_to_cpu(tlv_hdr->header.type)) { | |
723 | case TLV_TYPE_WMMQSTATUS: | |
724 | tlv_wmm_qstatus = | |
725 | (struct mwifiex_ie_types_wmm_queue_status *) | |
726 | tlv_hdr; | |
727 | dev_dbg(priv->adapter->dev, | |
728 | "info: CMD_RESP: WMM_GET_STATUS:" | |
729 | " QSTATUS TLV: %d, %d, %d\n", | |
c65a30f3 YAP |
730 | tlv_wmm_qstatus->queue_index, |
731 | tlv_wmm_qstatus->flow_required, | |
732 | tlv_wmm_qstatus->disabled); | |
5e6e3a92 BZ |
733 | |
734 | ac_status = &priv->wmm.ac_status[tlv_wmm_qstatus-> | |
735 | queue_index]; | |
736 | ac_status->disabled = tlv_wmm_qstatus->disabled; | |
737 | ac_status->flow_required = | |
c65a30f3 | 738 | tlv_wmm_qstatus->flow_required; |
5e6e3a92 BZ |
739 | ac_status->flow_created = tlv_wmm_qstatus->flow_created; |
740 | break; | |
741 | ||
742 | case WLAN_EID_VENDOR_SPECIFIC: | |
743 | /* | |
744 | * Point the regular IEEE IE 2 bytes into the Marvell IE | |
745 | * and setup the IEEE IE type and length byte fields | |
746 | */ | |
747 | ||
748 | wmm_param_ie = | |
749 | (struct ieee_types_wmm_parameter *) (curr + | |
750 | 2); | |
751 | wmm_param_ie->vend_hdr.len = (u8) tlv_len; | |
752 | wmm_param_ie->vend_hdr.element_id = | |
753 | WLAN_EID_VENDOR_SPECIFIC; | |
754 | ||
755 | dev_dbg(priv->adapter->dev, | |
756 | "info: CMD_RESP: WMM_GET_STATUS:" | |
757 | " WMM Parameter Set Count: %d\n", | |
758 | wmm_param_ie->qos_info_bitmap & | |
759 | IEEE80211_WMM_IE_AP_QOSINFO_PARAM_SET_CNT_MASK); | |
760 | ||
761 | memcpy((u8 *) &priv->curr_bss_params.bss_descriptor. | |
762 | wmm_ie, wmm_param_ie, | |
763 | wmm_param_ie->vend_hdr.len + 2); | |
764 | ||
765 | break; | |
766 | ||
767 | default: | |
768 | valid = false; | |
769 | break; | |
770 | } | |
771 | ||
772 | curr += (tlv_len + sizeof(tlv_hdr->header)); | |
773 | resp_len -= (tlv_len + sizeof(tlv_hdr->header)); | |
774 | } | |
775 | ||
776 | mwifiex_wmm_setup_queue_priorities(priv, wmm_param_ie); | |
777 | mwifiex_wmm_setup_ac_downgrade(priv); | |
778 | ||
779 | return 0; | |
780 | } | |
781 | ||
782 | /* | |
783 | * Callback handler from the command module to allow insertion of a WMM TLV. | |
784 | * | |
785 | * If the BSS we are associating to supports WMM, this function adds the | |
786 | * required WMM Information IE to the association request command buffer in | |
787 | * the form of a Marvell extended IEEE IE. | |
788 | */ | |
789 | u32 | |
790 | mwifiex_wmm_process_association_req(struct mwifiex_private *priv, | |
791 | u8 **assoc_buf, | |
792 | struct ieee_types_wmm_parameter *wmm_ie, | |
793 | struct ieee80211_ht_cap *ht_cap) | |
794 | { | |
795 | struct mwifiex_ie_types_wmm_param_set *wmm_tlv; | |
796 | u32 ret_len = 0; | |
797 | ||
798 | /* Null checks */ | |
799 | if (!assoc_buf) | |
800 | return 0; | |
801 | if (!(*assoc_buf)) | |
802 | return 0; | |
803 | ||
804 | if (!wmm_ie) | |
805 | return 0; | |
806 | ||
c65a30f3 YAP |
807 | dev_dbg(priv->adapter->dev, |
808 | "info: WMM: process assoc req: bss->wmm_ie=%#x\n", | |
809 | wmm_ie->vend_hdr.element_id); | |
5e6e3a92 | 810 | |
c65a30f3 YAP |
811 | if ((priv->wmm_required || |
812 | (ht_cap && (priv->adapter->config_bands & BAND_GN || | |
813 | priv->adapter->config_bands & BAND_AN))) && | |
814 | wmm_ie->vend_hdr.element_id == WLAN_EID_VENDOR_SPECIFIC) { | |
5e6e3a92 BZ |
815 | wmm_tlv = (struct mwifiex_ie_types_wmm_param_set *) *assoc_buf; |
816 | wmm_tlv->header.type = cpu_to_le16((u16) wmm_info_ie[0]); | |
817 | wmm_tlv->header.len = cpu_to_le16((u16) wmm_info_ie[1]); | |
818 | memcpy(wmm_tlv->wmm_ie, &wmm_info_ie[2], | |
c65a30f3 | 819 | le16_to_cpu(wmm_tlv->header.len)); |
5e6e3a92 BZ |
820 | if (wmm_ie->qos_info_bitmap & IEEE80211_WMM_IE_AP_QOSINFO_UAPSD) |
821 | memcpy((u8 *) (wmm_tlv->wmm_ie | |
c65a30f3 YAP |
822 | + le16_to_cpu(wmm_tlv->header.len) |
823 | - sizeof(priv->wmm_qosinfo)), | |
824 | &priv->wmm_qosinfo, sizeof(priv->wmm_qosinfo)); | |
5e6e3a92 BZ |
825 | |
826 | ret_len = sizeof(wmm_tlv->header) | |
c65a30f3 | 827 | + le16_to_cpu(wmm_tlv->header.len); |
5e6e3a92 BZ |
828 | |
829 | *assoc_buf += ret_len; | |
830 | } | |
831 | ||
832 | return ret_len; | |
833 | } | |
834 | ||
835 | /* | |
836 | * This function computes the time delay in the driver queues for a | |
837 | * given packet. | |
838 | * | |
839 | * When the packet is received at the OS/Driver interface, the current | |
840 | * time is set in the packet structure. The difference between the present | |
841 | * time and that received time is computed in this function and limited | |
842 | * based on pre-compiled limits in the driver. | |
843 | */ | |
844 | u8 | |
845 | mwifiex_wmm_compute_drv_pkt_delay(struct mwifiex_private *priv, | |
c65a30f3 | 846 | const struct sk_buff *skb) |
5e6e3a92 | 847 | { |
270e58e8 | 848 | u8 ret_val; |
5e6e3a92 BZ |
849 | struct timeval out_tstamp, in_tstamp; |
850 | u32 queue_delay; | |
851 | ||
852 | do_gettimeofday(&out_tstamp); | |
853 | in_tstamp = ktime_to_timeval(skb->tstamp); | |
854 | ||
855 | queue_delay = (out_tstamp.tv_sec - in_tstamp.tv_sec) * 1000; | |
856 | queue_delay += (out_tstamp.tv_usec - in_tstamp.tv_usec) / 1000; | |
857 | ||
858 | /* | |
859 | * Queue delay is passed as a uint8 in units of 2ms (ms shifted | |
860 | * by 1). Min value (other than 0) is therefore 2ms, max is 510ms. | |
861 | * | |
862 | * Pass max value if queue_delay is beyond the uint8 range | |
863 | */ | |
864 | ret_val = (u8) (min(queue_delay, priv->wmm.drv_pkt_delay_max) >> 1); | |
865 | ||
866 | dev_dbg(priv->adapter->dev, "data: WMM: Pkt Delay: %d ms," | |
867 | " %d ms sent to FW\n", queue_delay, ret_val); | |
868 | ||
869 | return ret_val; | |
870 | } | |
871 | ||
872 | /* | |
873 | * This function retrieves the highest priority RA list table pointer. | |
874 | */ | |
875 | static struct mwifiex_ra_list_tbl * | |
876 | mwifiex_wmm_get_highest_priolist_ptr(struct mwifiex_adapter *adapter, | |
877 | struct mwifiex_private **priv, int *tid) | |
878 | { | |
879 | struct mwifiex_private *priv_tmp; | |
2e237319 | 880 | struct mwifiex_ra_list_tbl *ptr; |
5e6e3a92 | 881 | struct mwifiex_tid_tbl *tid_ptr; |
bb7de2ba | 882 | atomic_t *hqp; |
2716fd7d | 883 | unsigned long flags_bss, flags_ra; |
5e6e3a92 BZ |
884 | int i, j; |
885 | ||
b006ed54 | 886 | /* check the BSS with highest priority first */ |
5e6e3a92 BZ |
887 | for (j = adapter->priv_num - 1; j >= 0; --j) { |
888 | spin_lock_irqsave(&adapter->bss_prio_tbl[j].bss_prio_lock, | |
2716fd7d AF |
889 | flags_bss); |
890 | ||
b006ed54 AF |
891 | /* iterate over BSS with the equal priority */ |
892 | list_for_each_entry(adapter->bss_prio_tbl[j].bss_prio_cur, | |
893 | &adapter->bss_prio_tbl[j].bss_prio_head, | |
894 | list) { | |
16051b0e | 895 | |
b006ed54 | 896 | priv_tmp = adapter->bss_prio_tbl[j].bss_prio_cur->priv; |
5e6e3a92 | 897 | |
333f6b22 | 898 | if (atomic_read(&priv_tmp->wmm.tx_pkts_queued) == 0) |
b006ed54 | 899 | continue; |
333f6b22 AF |
900 | |
901 | /* iterate over the WMM queues of the BSS */ | |
902 | hqp = &priv_tmp->wmm.highest_queued_prio; | |
49729ff6 | 903 | for (i = atomic_read(hqp); i >= LOW_PRIO_TID; --i) { |
5e6e3a92 | 904 | |
2716fd7d AF |
905 | spin_lock_irqsave(&priv_tmp->wmm. |
906 | ra_list_spinlock, flags_ra); | |
907 | ||
5e6e3a92 BZ |
908 | tid_ptr = &(priv_tmp)->wmm. |
909 | tid_tbl_ptr[tos_to_tid[i]]; | |
910 | ||
2e237319 AF |
911 | /* iterate over receiver addresses */ |
912 | list_for_each_entry(ptr, &tid_ptr->ra_list, | |
913 | list) { | |
5e6e3a92 | 914 | |
2716fd7d AF |
915 | if (!skb_queue_empty(&ptr->skb_head)) |
916 | /* holds both locks */ | |
bb7de2ba | 917 | goto found; |
2e237319 | 918 | } |
bb7de2ba | 919 | |
2716fd7d AF |
920 | spin_unlock_irqrestore(&priv_tmp->wmm. |
921 | ra_list_spinlock, | |
922 | flags_ra); | |
5e6e3a92 | 923 | } |
b006ed54 | 924 | } |
5e6e3a92 | 925 | |
2716fd7d AF |
926 | spin_unlock_irqrestore(&adapter->bss_prio_tbl[j].bss_prio_lock, |
927 | flags_bss); | |
5e6e3a92 | 928 | } |
2716fd7d | 929 | |
5e6e3a92 | 930 | return NULL; |
bb7de2ba YAP |
931 | |
932 | found: | |
2716fd7d | 933 | /* holds bss_prio_lock / ra_list_spinlock */ |
bb7de2ba YAP |
934 | if (atomic_read(hqp) > i) |
935 | atomic_set(hqp, i); | |
2716fd7d AF |
936 | spin_unlock_irqrestore(&priv_tmp->wmm.ra_list_spinlock, flags_ra); |
937 | spin_unlock_irqrestore(&adapter->bss_prio_tbl[j].bss_prio_lock, | |
938 | flags_bss); | |
bb7de2ba YAP |
939 | |
940 | *priv = priv_tmp; | |
941 | *tid = tos_to_tid[i]; | |
942 | ||
943 | return ptr; | |
5e6e3a92 BZ |
944 | } |
945 | ||
b006ed54 | 946 | /* This functions rotates ra and bss lists so packets are picked round robin. |
2e237319 AF |
947 | * |
948 | * After a packet is successfully transmitted, rotate the ra list, so the ra | |
949 | * next to the one transmitted, will come first in the list. This way we pick | |
b006ed54 AF |
950 | * the ra' in a round robin fashion. Same applies to bss nodes of equal |
951 | * priority. | |
2e237319 AF |
952 | * |
953 | * Function also increments wmm.packets_out counter. | |
954 | */ | |
955 | void mwifiex_rotate_priolists(struct mwifiex_private *priv, | |
956 | struct mwifiex_ra_list_tbl *ra, | |
957 | int tid) | |
958 | { | |
b006ed54 AF |
959 | struct mwifiex_adapter *adapter = priv->adapter; |
960 | struct mwifiex_bss_prio_tbl *tbl = adapter->bss_prio_tbl; | |
2e237319 AF |
961 | struct mwifiex_tid_tbl *tid_ptr = &priv->wmm.tid_tbl_ptr[tid]; |
962 | unsigned long flags; | |
963 | ||
b006ed54 AF |
964 | spin_lock_irqsave(&tbl[priv->bss_priority].bss_prio_lock, flags); |
965 | /* | |
966 | * dirty trick: we remove 'head' temporarily and reinsert it after | |
967 | * curr bss node. imagine list to stay fixed while head is moved | |
968 | */ | |
969 | list_move(&tbl[priv->bss_priority].bss_prio_head, | |
970 | &tbl[priv->bss_priority].bss_prio_cur->list); | |
971 | spin_unlock_irqrestore(&tbl[priv->bss_priority].bss_prio_lock, flags); | |
972 | ||
2e237319 AF |
973 | spin_lock_irqsave(&priv->wmm.ra_list_spinlock, flags); |
974 | if (mwifiex_is_ralist_valid(priv, ra, tid)) { | |
975 | priv->wmm.packets_out[tid]++; | |
b006ed54 | 976 | /* same as above */ |
2e237319 AF |
977 | list_move(&tid_ptr->ra_list, &ra->list); |
978 | } | |
979 | spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, flags); | |
980 | } | |
981 | ||
d85c5fe4 AK |
982 | /* |
983 | * This function checks if 11n aggregation is possible. | |
984 | */ | |
985 | static int | |
986 | mwifiex_is_11n_aggragation_possible(struct mwifiex_private *priv, | |
987 | struct mwifiex_ra_list_tbl *ptr, | |
988 | int max_buf_size) | |
989 | { | |
990 | int count = 0, total_size = 0; | |
991 | struct sk_buff *skb, *tmp; | |
5a009adf AP |
992 | int max_amsdu_size; |
993 | ||
994 | if (priv->bss_role == MWIFIEX_BSS_ROLE_UAP && priv->ap_11n_enabled && | |
995 | ptr->is_11n_enabled) | |
996 | max_amsdu_size = min_t(int, ptr->max_amsdu, max_buf_size); | |
997 | else | |
998 | max_amsdu_size = max_buf_size; | |
d85c5fe4 AK |
999 | |
1000 | skb_queue_walk_safe(&ptr->skb_head, skb, tmp) { | |
1001 | total_size += skb->len; | |
5a009adf | 1002 | if (total_size >= max_amsdu_size) |
d85c5fe4 AK |
1003 | break; |
1004 | if (++count >= MIN_NUM_AMSDU) | |
1005 | return true; | |
1006 | } | |
1007 | ||
1008 | return false; | |
1009 | } | |
1010 | ||
5e6e3a92 BZ |
1011 | /* |
1012 | * This function sends a single packet to firmware for transmission. | |
1013 | */ | |
1014 | static void | |
1015 | mwifiex_send_single_packet(struct mwifiex_private *priv, | |
1016 | struct mwifiex_ra_list_tbl *ptr, int ptr_index, | |
1017 | unsigned long ra_list_flags) | |
1018 | __releases(&priv->wmm.ra_list_spinlock) | |
1019 | { | |
1020 | struct sk_buff *skb, *skb_next; | |
1021 | struct mwifiex_tx_param tx_param; | |
1022 | struct mwifiex_adapter *adapter = priv->adapter; | |
5e6e3a92 BZ |
1023 | struct mwifiex_txinfo *tx_info; |
1024 | ||
1025 | if (skb_queue_empty(&ptr->skb_head)) { | |
1026 | spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, | |
1027 | ra_list_flags); | |
1028 | dev_dbg(adapter->dev, "data: nothing to send\n"); | |
1029 | return; | |
1030 | } | |
1031 | ||
1032 | skb = skb_dequeue(&ptr->skb_head); | |
1033 | ||
1034 | tx_info = MWIFIEX_SKB_TXCB(skb); | |
1035 | dev_dbg(adapter->dev, "data: dequeuing the packet %p %p\n", ptr, skb); | |
1036 | ||
1037 | ptr->total_pkts_size -= skb->len; | |
1038 | ||
1039 | if (!skb_queue_empty(&ptr->skb_head)) | |
1040 | skb_next = skb_peek(&ptr->skb_head); | |
1041 | else | |
1042 | skb_next = NULL; | |
1043 | ||
1044 | spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, ra_list_flags); | |
1045 | ||
1046 | tx_param.next_pkt_len = ((skb_next) ? skb_next->len + | |
1047 | sizeof(struct txpd) : 0); | |
1048 | ||
636c4598 | 1049 | if (mwifiex_process_tx(priv, skb, &tx_param) == -EBUSY) { |
5e6e3a92 BZ |
1050 | /* Queue the packet back at the head */ |
1051 | spin_lock_irqsave(&priv->wmm.ra_list_spinlock, ra_list_flags); | |
1052 | ||
1053 | if (!mwifiex_is_ralist_valid(priv, ptr, ptr_index)) { | |
1054 | spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, | |
1055 | ra_list_flags); | |
47411a06 | 1056 | mwifiex_write_data_complete(adapter, skb, 0, -1); |
5e6e3a92 BZ |
1057 | return; |
1058 | } | |
1059 | ||
1060 | skb_queue_tail(&ptr->skb_head, skb); | |
1061 | ||
1062 | ptr->total_pkts_size += skb->len; | |
5a009adf | 1063 | ptr->pkt_count++; |
5e6e3a92 BZ |
1064 | tx_info->flags |= MWIFIEX_BUF_FLAG_REQUEUED_PKT; |
1065 | spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, | |
1066 | ra_list_flags); | |
1067 | } else { | |
2e237319 | 1068 | mwifiex_rotate_priolists(priv, ptr, ptr_index); |
f699254c | 1069 | atomic_dec(&priv->wmm.tx_pkts_queued); |
5e6e3a92 BZ |
1070 | } |
1071 | } | |
1072 | ||
1073 | /* | |
1074 | * This function checks if the first packet in the given RA list | |
1075 | * is already processed or not. | |
1076 | */ | |
1077 | static int | |
1078 | mwifiex_is_ptr_processed(struct mwifiex_private *priv, | |
1079 | struct mwifiex_ra_list_tbl *ptr) | |
1080 | { | |
1081 | struct sk_buff *skb; | |
1082 | struct mwifiex_txinfo *tx_info; | |
1083 | ||
1084 | if (skb_queue_empty(&ptr->skb_head)) | |
1085 | return false; | |
1086 | ||
1087 | skb = skb_peek(&ptr->skb_head); | |
1088 | ||
1089 | tx_info = MWIFIEX_SKB_TXCB(skb); | |
1090 | if (tx_info->flags & MWIFIEX_BUF_FLAG_REQUEUED_PKT) | |
1091 | return true; | |
1092 | ||
1093 | return false; | |
1094 | } | |
1095 | ||
1096 | /* | |
1097 | * This function sends a single processed packet to firmware for | |
1098 | * transmission. | |
1099 | */ | |
1100 | static void | |
1101 | mwifiex_send_processed_packet(struct mwifiex_private *priv, | |
1102 | struct mwifiex_ra_list_tbl *ptr, int ptr_index, | |
1103 | unsigned long ra_list_flags) | |
1104 | __releases(&priv->wmm.ra_list_spinlock) | |
1105 | { | |
1106 | struct mwifiex_tx_param tx_param; | |
1107 | struct mwifiex_adapter *adapter = priv->adapter; | |
1108 | int ret = -1; | |
1109 | struct sk_buff *skb, *skb_next; | |
1110 | struct mwifiex_txinfo *tx_info; | |
1111 | ||
1112 | if (skb_queue_empty(&ptr->skb_head)) { | |
1113 | spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, | |
1114 | ra_list_flags); | |
1115 | return; | |
1116 | } | |
1117 | ||
1118 | skb = skb_dequeue(&ptr->skb_head); | |
1119 | ||
1120 | if (!skb_queue_empty(&ptr->skb_head)) | |
1121 | skb_next = skb_peek(&ptr->skb_head); | |
1122 | else | |
1123 | skb_next = NULL; | |
1124 | ||
1125 | tx_info = MWIFIEX_SKB_TXCB(skb); | |
1126 | ||
1127 | spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, ra_list_flags); | |
4daffe35 AK |
1128 | |
1129 | if (adapter->iface_type == MWIFIEX_USB) { | |
1130 | adapter->data_sent = true; | |
1131 | ret = adapter->if_ops.host_to_card(adapter, MWIFIEX_USB_EP_DATA, | |
1132 | skb, NULL); | |
1133 | } else { | |
1134 | tx_param.next_pkt_len = | |
1135 | ((skb_next) ? skb_next->len + | |
1136 | sizeof(struct txpd) : 0); | |
1137 | ret = adapter->if_ops.host_to_card(adapter, MWIFIEX_TYPE_DATA, | |
1138 | skb, &tx_param); | |
1139 | } | |
1140 | ||
5e6e3a92 BZ |
1141 | switch (ret) { |
1142 | case -EBUSY: | |
1143 | dev_dbg(adapter->dev, "data: -EBUSY is returned\n"); | |
1144 | spin_lock_irqsave(&priv->wmm.ra_list_spinlock, ra_list_flags); | |
1145 | ||
1146 | if (!mwifiex_is_ralist_valid(priv, ptr, ptr_index)) { | |
1147 | spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, | |
1148 | ra_list_flags); | |
47411a06 | 1149 | mwifiex_write_data_complete(adapter, skb, 0, -1); |
5e6e3a92 BZ |
1150 | return; |
1151 | } | |
1152 | ||
1153 | skb_queue_tail(&ptr->skb_head, skb); | |
1154 | ||
1155 | tx_info->flags |= MWIFIEX_BUF_FLAG_REQUEUED_PKT; | |
1156 | spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, | |
1157 | ra_list_flags); | |
1158 | break; | |
1159 | case -1: | |
e7f767a7 AP |
1160 | if (adapter->iface_type != MWIFIEX_PCIE) |
1161 | adapter->data_sent = false; | |
5e6e3a92 BZ |
1162 | dev_err(adapter->dev, "host_to_card failed: %#x\n", ret); |
1163 | adapter->dbg.num_tx_host_to_card_failure++; | |
47411a06 | 1164 | mwifiex_write_data_complete(adapter, skb, 0, ret); |
5e6e3a92 BZ |
1165 | break; |
1166 | case -EINPROGRESS: | |
e7f767a7 AP |
1167 | if (adapter->iface_type != MWIFIEX_PCIE) |
1168 | adapter->data_sent = false; | |
5e6e3a92 BZ |
1169 | default: |
1170 | break; | |
1171 | } | |
1172 | if (ret != -EBUSY) { | |
2e237319 | 1173 | mwifiex_rotate_priolists(priv, ptr, ptr_index); |
f699254c | 1174 | atomic_dec(&priv->wmm.tx_pkts_queued); |
5e6e3a92 BZ |
1175 | } |
1176 | } | |
1177 | ||
1178 | /* | |
1179 | * This function dequeues a packet from the highest priority list | |
1180 | * and transmits it. | |
1181 | */ | |
1182 | static int | |
1183 | mwifiex_dequeue_tx_packet(struct mwifiex_adapter *adapter) | |
1184 | { | |
1185 | struct mwifiex_ra_list_tbl *ptr; | |
1186 | struct mwifiex_private *priv = NULL; | |
1187 | int ptr_index = 0; | |
1188 | u8 ra[ETH_ALEN]; | |
1189 | int tid_del = 0, tid = 0; | |
1190 | unsigned long flags; | |
1191 | ||
1192 | ptr = mwifiex_wmm_get_highest_priolist_ptr(adapter, &priv, &ptr_index); | |
1193 | if (!ptr) | |
1194 | return -1; | |
1195 | ||
572e8f3e | 1196 | tid = mwifiex_get_tid(ptr); |
5e6e3a92 BZ |
1197 | |
1198 | dev_dbg(adapter->dev, "data: tid=%d\n", tid); | |
1199 | ||
1200 | spin_lock_irqsave(&priv->wmm.ra_list_spinlock, flags); | |
1201 | if (!mwifiex_is_ralist_valid(priv, ptr, ptr_index)) { | |
1202 | spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, flags); | |
1203 | return -1; | |
1204 | } | |
1205 | ||
1206 | if (mwifiex_is_ptr_processed(priv, ptr)) { | |
1207 | mwifiex_send_processed_packet(priv, ptr, ptr_index, flags); | |
1208 | /* ra_list_spinlock has been freed in | |
1209 | mwifiex_send_processed_packet() */ | |
1210 | return 0; | |
1211 | } | |
1212 | ||
c65a30f3 YAP |
1213 | if (!ptr->is_11n_enabled || |
1214 | mwifiex_is_ba_stream_setup(priv, ptr, tid) || | |
f03ba7e9 | 1215 | priv->wps.session_enable || |
c65a30f3 YAP |
1216 | ((priv->sec_info.wpa_enabled || |
1217 | priv->sec_info.wpa2_enabled) && | |
1218 | !priv->wpa_is_gtk_set)) { | |
5e6e3a92 BZ |
1219 | mwifiex_send_single_packet(priv, ptr, ptr_index, flags); |
1220 | /* ra_list_spinlock has been freed in | |
1221 | mwifiex_send_single_packet() */ | |
1222 | } else { | |
5a009adf AP |
1223 | if (mwifiex_is_ampdu_allowed(priv, tid) && |
1224 | ptr->pkt_count > ptr->ba_packet_thr) { | |
53d7938e | 1225 | if (mwifiex_space_avail_for_new_ba_stream(adapter)) { |
3e822635 YAP |
1226 | mwifiex_create_ba_tbl(priv, ptr->ra, tid, |
1227 | BA_SETUP_INPROGRESS); | |
5e6e3a92 BZ |
1228 | mwifiex_send_addba(priv, tid, ptr->ra); |
1229 | } else if (mwifiex_find_stream_to_delete | |
572e8f3e | 1230 | (priv, tid, &tid_del, ra)) { |
3e822635 YAP |
1231 | mwifiex_create_ba_tbl(priv, ptr->ra, tid, |
1232 | BA_SETUP_INPROGRESS); | |
5e6e3a92 BZ |
1233 | mwifiex_send_delba(priv, tid_del, ra, 1); |
1234 | } | |
1235 | } | |
572e8f3e | 1236 | if (mwifiex_is_amsdu_allowed(priv, tid) && |
d85c5fe4 AK |
1237 | mwifiex_is_11n_aggragation_possible(priv, ptr, |
1238 | adapter->tx_buf_size)) | |
5e6e3a92 BZ |
1239 | mwifiex_11n_aggregate_pkt(priv, ptr, INTF_HEADER_LEN, |
1240 | ptr_index, flags); | |
1241 | /* ra_list_spinlock has been freed in | |
1242 | mwifiex_11n_aggregate_pkt() */ | |
1243 | else | |
1244 | mwifiex_send_single_packet(priv, ptr, ptr_index, flags); | |
1245 | /* ra_list_spinlock has been freed in | |
1246 | mwifiex_send_single_packet() */ | |
1247 | } | |
1248 | return 0; | |
1249 | } | |
1250 | ||
1251 | /* | |
1252 | * This function transmits the highest priority packet awaiting in the | |
1253 | * WMM Queues. | |
1254 | */ | |
1255 | void | |
1256 | mwifiex_wmm_process_tx(struct mwifiex_adapter *adapter) | |
1257 | { | |
1258 | do { | |
1259 | /* Check if busy */ | |
1260 | if (adapter->data_sent || adapter->tx_lock_flag) | |
1261 | break; | |
1262 | ||
1263 | if (mwifiex_dequeue_tx_packet(adapter)) | |
1264 | break; | |
93968147 | 1265 | } while (!mwifiex_wmm_lists_empty(adapter)); |
5e6e3a92 | 1266 | } |