diff options
Diffstat (limited to 'drivers/net/wireless/mwifiex/wmm.c')
-rw-r--r-- | drivers/net/wireless/mwifiex/wmm.c | 1237 |
1 files changed, 1237 insertions, 0 deletions
diff --git a/drivers/net/wireless/mwifiex/wmm.c b/drivers/net/wireless/mwifiex/wmm.c new file mode 100644 index 00000000000..1cfbc6bed69 --- /dev/null +++ b/drivers/net/wireless/mwifiex/wmm.c | |||
@@ -0,0 +1,1237 @@ | |||
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, " | ||
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)); | ||
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); | ||
112 | |||
113 | if (!ra_list) { | ||
114 | dev_err(adapter->dev, "%s: failed to alloc ra_list\n", | ||
115 | __func__); | ||
116 | return NULL; | ||
117 | } | ||
118 | INIT_LIST_HEAD(&ra_list->list); | ||
119 | skb_queue_head_init(&ra_list->skb_head); | ||
120 | |||
121 | memcpy(ra_list->ra, ra, ETH_ALEN); | ||
122 | |||
123 | ra_list->total_pkts_size = 0; | ||
124 | |||
125 | dev_dbg(adapter->dev, "info: allocated ra_list %p\n", ra_list); | ||
126 | |||
127 | return ra_list; | ||
128 | } | ||
129 | |||
130 | /* | ||
131 | * This function allocates and adds a RA list for all TIDs | ||
132 | * with the given RA. | ||
133 | */ | ||
134 | void | ||
135 | mwifiex_ralist_add(struct mwifiex_private *priv, u8 *ra) | ||
136 | { | ||
137 | int i; | ||
138 | struct mwifiex_ra_list_tbl *ra_list; | ||
139 | struct mwifiex_adapter *adapter = priv->adapter; | ||
140 | |||
141 | for (i = 0; i < MAX_NUM_TID; ++i) { | ||
142 | ra_list = mwifiex_wmm_allocate_ralist_node(adapter, ra); | ||
143 | dev_dbg(adapter->dev, "info: created ra_list %p\n", ra_list); | ||
144 | |||
145 | if (!ra_list) | ||
146 | break; | ||
147 | |||
148 | if (!mwifiex_queuing_ra_based(priv)) | ||
149 | ra_list->is_11n_enabled = IS_11N_ENABLED(priv); | ||
150 | else | ||
151 | ra_list->is_11n_enabled = false; | ||
152 | |||
153 | dev_dbg(adapter->dev, "data: ralist %p: is_11n_enabled=%d\n", | ||
154 | ra_list, ra_list->is_11n_enabled); | ||
155 | |||
156 | list_add_tail(&ra_list->list, | ||
157 | &priv->wmm.tid_tbl_ptr[i].ra_list); | ||
158 | |||
159 | if (!priv->wmm.tid_tbl_ptr[i].ra_list_curr) | ||
160 | priv->wmm.tid_tbl_ptr[i].ra_list_curr = ra_list; | ||
161 | } | ||
162 | } | ||
163 | |||
164 | /* | ||
165 | * This function sets the WMM queue priorities to their default values. | ||
166 | */ | ||
167 | static void mwifiex_wmm_default_queue_priorities(struct mwifiex_private *priv) | ||
168 | { | ||
169 | /* Default queue priorities: VO->VI->BE->BK */ | ||
170 | priv->wmm.queue_priority[0] = WMM_AC_VO; | ||
171 | priv->wmm.queue_priority[1] = WMM_AC_VI; | ||
172 | priv->wmm.queue_priority[2] = WMM_AC_BE; | ||
173 | priv->wmm.queue_priority[3] = WMM_AC_BK; | ||
174 | } | ||
175 | |||
176 | /* | ||
177 | * This function map ACs to TIDs. | ||
178 | */ | ||
179 | static void | ||
180 | mwifiex_wmm_queue_priorities_tid(struct mwifiex_private *priv, | ||
181 | u8 queue_priority[]) | ||
182 | { | ||
183 | int i; | ||
184 | |||
185 | for (i = 0; i < 4; ++i) { | ||
186 | tos_to_tid[7 - (i * 2)] = ac_to_tid[queue_priority[i]][1]; | ||
187 | tos_to_tid[6 - (i * 2)] = ac_to_tid[queue_priority[i]][0]; | ||
188 | } | ||
189 | } | ||
190 | |||
191 | /* | ||
192 | * This function initializes WMM priority queues. | ||
193 | */ | ||
194 | void | ||
195 | mwifiex_wmm_setup_queue_priorities(struct mwifiex_private *priv, | ||
196 | struct ieee_types_wmm_parameter *wmm_ie) | ||
197 | { | ||
198 | u16 cw_min, avg_back_off, tmp[4]; | ||
199 | u32 i, j, num_ac; | ||
200 | u8 ac_idx; | ||
201 | |||
202 | if (!wmm_ie || !priv->wmm_enabled) { | ||
203 | /* WMM is not enabled, just set the defaults and return */ | ||
204 | mwifiex_wmm_default_queue_priorities(priv); | ||
205 | return; | ||
206 | } | ||
207 | |||
208 | dev_dbg(priv->adapter->dev, "info: WMM Parameter IE: version=%d, " | ||
209 | "qos_info Parameter Set Count=%d, Reserved=%#x\n", | ||
210 | wmm_ie->vend_hdr.version, wmm_ie->qos_info_bitmap & | ||
211 | IEEE80211_WMM_IE_AP_QOSINFO_PARAM_SET_CNT_MASK, | ||
212 | wmm_ie->reserved); | ||
213 | |||
214 | for (num_ac = 0; num_ac < ARRAY_SIZE(wmm_ie->ac_params); num_ac++) { | ||
215 | cw_min = (1 << (wmm_ie->ac_params[num_ac].ecw_bitmap & | ||
216 | MWIFIEX_ECW_MIN)) - 1; | ||
217 | avg_back_off = (cw_min >> 1) + | ||
218 | (wmm_ie->ac_params[num_ac].aci_aifsn_bitmap & | ||
219 | MWIFIEX_AIFSN); | ||
220 | |||
221 | ac_idx = wmm_aci_to_qidx_map[(wmm_ie->ac_params[num_ac]. | ||
222 | aci_aifsn_bitmap & | ||
223 | MWIFIEX_ACI) >> 5]; | ||
224 | priv->wmm.queue_priority[ac_idx] = ac_idx; | ||
225 | tmp[ac_idx] = avg_back_off; | ||
226 | |||
227 | dev_dbg(priv->adapter->dev, "info: WMM: CWmax=%d CWmin=%d Avg Back-off=%d\n", | ||
228 | (1 << ((wmm_ie->ac_params[num_ac].ecw_bitmap & | ||
229 | MWIFIEX_ECW_MAX) >> 4)) - 1, | ||
230 | cw_min, avg_back_off); | ||
231 | mwifiex_wmm_ac_debug_print(&wmm_ie->ac_params[num_ac]); | ||
232 | } | ||
233 | |||
234 | /* Bubble sort */ | ||
235 | for (i = 0; i < num_ac; i++) { | ||
236 | for (j = 1; j < num_ac - i; j++) { | ||
237 | if (tmp[j - 1] > tmp[j]) { | ||
238 | swap(tmp[j - 1], tmp[j]); | ||
239 | swap(priv->wmm.queue_priority[j - 1], | ||
240 | priv->wmm.queue_priority[j]); | ||
241 | } else if (tmp[j - 1] == tmp[j]) { | ||
242 | if (priv->wmm.queue_priority[j - 1] | ||
243 | < priv->wmm.queue_priority[j]) | ||
244 | swap(priv->wmm.queue_priority[j - 1], | ||
245 | priv->wmm.queue_priority[j]); | ||
246 | } | ||
247 | } | ||
248 | } | ||
249 | |||
250 | mwifiex_wmm_queue_priorities_tid(priv, priv->wmm.queue_priority); | ||
251 | } | ||
252 | |||
253 | /* | ||
254 | * This function evaluates whether or not an AC is to be downgraded. | ||
255 | * | ||
256 | * In case the AC is not enabled, the highest AC is returned that is | ||
257 | * enabled and does not require admission control. | ||
258 | */ | ||
259 | static enum mwifiex_wmm_ac_e | ||
260 | mwifiex_wmm_eval_downgrade_ac(struct mwifiex_private *priv, | ||
261 | enum mwifiex_wmm_ac_e eval_ac) | ||
262 | { | ||
263 | int down_ac; | ||
264 | enum mwifiex_wmm_ac_e ret_ac; | ||
265 | struct mwifiex_wmm_ac_status *ac_status; | ||
266 | |||
267 | ac_status = &priv->wmm.ac_status[eval_ac]; | ||
268 | |||
269 | if (!ac_status->disabled) | ||
270 | /* Okay to use this AC, its enabled */ | ||
271 | return eval_ac; | ||
272 | |||
273 | /* Setup a default return value of the lowest priority */ | ||
274 | ret_ac = WMM_AC_BK; | ||
275 | |||
276 | /* | ||
277 | * Find the highest AC that is enabled and does not require | ||
278 | * admission control. The spec disallows downgrading to an AC, | ||
279 | * which is enabled due to a completed admission control. | ||
280 | * Unadmitted traffic is not to be sent on an AC with admitted | ||
281 | * traffic. | ||
282 | */ | ||
283 | for (down_ac = WMM_AC_BK; down_ac < eval_ac; down_ac++) { | ||
284 | ac_status = &priv->wmm.ac_status[down_ac]; | ||
285 | |||
286 | if (!ac_status->disabled && !ac_status->flow_required) | ||
287 | /* AC is enabled and does not require admission | ||
288 | control */ | ||
289 | ret_ac = (enum mwifiex_wmm_ac_e) down_ac; | ||
290 | } | ||
291 | |||
292 | return ret_ac; | ||
293 | } | ||
294 | |||
295 | /* | ||
296 | * This function downgrades WMM priority queue. | ||
297 | */ | ||
298 | void | ||
299 | mwifiex_wmm_setup_ac_downgrade(struct mwifiex_private *priv) | ||
300 | { | ||
301 | int ac_val; | ||
302 | |||
303 | dev_dbg(priv->adapter->dev, "info: WMM: AC Priorities:" | ||
304 | "BK(0), BE(1), VI(2), VO(3)\n"); | ||
305 | |||
306 | if (!priv->wmm_enabled) { | ||
307 | /* WMM is not enabled, default priorities */ | ||
308 | for (ac_val = WMM_AC_BK; ac_val <= WMM_AC_VO; ac_val++) | ||
309 | priv->wmm.ac_down_graded_vals[ac_val] = | ||
310 | (enum mwifiex_wmm_ac_e) ac_val; | ||
311 | } else { | ||
312 | for (ac_val = WMM_AC_BK; ac_val <= WMM_AC_VO; ac_val++) { | ||
313 | priv->wmm.ac_down_graded_vals[ac_val] | ||
314 | = mwifiex_wmm_eval_downgrade_ac(priv, | ||
315 | (enum mwifiex_wmm_ac_e) ac_val); | ||
316 | dev_dbg(priv->adapter->dev, "info: WMM: AC PRIO %d maps to %d\n", | ||
317 | ac_val, priv->wmm.ac_down_graded_vals[ac_val]); | ||
318 | } | ||
319 | } | ||
320 | } | ||
321 | |||
322 | /* | ||
323 | * This function converts the IP TOS field to an WMM AC | ||
324 | * Queue assignment. | ||
325 | */ | ||
326 | static enum mwifiex_wmm_ac_e | ||
327 | mwifiex_wmm_convert_tos_to_ac(struct mwifiex_adapter *adapter, u32 tos) | ||
328 | { | ||
329 | /* Map of TOS UP values to WMM AC */ | ||
330 | const enum mwifiex_wmm_ac_e tos_to_ac[] = { WMM_AC_BE, | ||
331 | WMM_AC_BK, | ||
332 | WMM_AC_BK, | ||
333 | WMM_AC_BE, | ||
334 | WMM_AC_VI, | ||
335 | WMM_AC_VI, | ||
336 | WMM_AC_VO, | ||
337 | WMM_AC_VO | ||
338 | }; | ||
339 | |||
340 | if (tos >= ARRAY_SIZE(tos_to_ac)) | ||
341 | return WMM_AC_BE; | ||
342 | |||
343 | return tos_to_ac[tos]; | ||
344 | } | ||
345 | |||
346 | /* | ||
347 | * This function evaluates a given TID and downgrades it to a lower | ||
348 | * TID if the WMM Parameter IE received from the AP indicates that the | ||
349 | * AP is disabled (due to call admission control (ACM bit). Mapping | ||
350 | * of TID to AC is taken care of internally. | ||
351 | */ | ||
352 | static u8 | ||
353 | mwifiex_wmm_downgrade_tid(struct mwifiex_private *priv, u32 tid) | ||
354 | { | ||
355 | enum mwifiex_wmm_ac_e ac, ac_down; | ||
356 | u8 new_tid; | ||
357 | |||
358 | ac = mwifiex_wmm_convert_tos_to_ac(priv->adapter, tid); | ||
359 | ac_down = priv->wmm.ac_down_graded_vals[ac]; | ||
360 | |||
361 | /* Send the index to tid array, picking from the array will be | ||
362 | * taken care by dequeuing function | ||
363 | */ | ||
364 | new_tid = ac_to_tid[ac_down][tid % 2]; | ||
365 | |||
366 | return new_tid; | ||
367 | } | ||
368 | |||
369 | /* | ||
370 | * This function initializes the WMM state information and the | ||
371 | * WMM data path queues. | ||
372 | */ | ||
373 | void | ||
374 | mwifiex_wmm_init(struct mwifiex_adapter *adapter) | ||
375 | { | ||
376 | int i, j; | ||
377 | struct mwifiex_private *priv; | ||
378 | |||
379 | for (j = 0; j < adapter->priv_num; ++j) { | ||
380 | priv = adapter->priv[j]; | ||
381 | if (!priv) | ||
382 | continue; | ||
383 | |||
384 | for (i = 0; i < MAX_NUM_TID; ++i) { | ||
385 | priv->aggr_prio_tbl[i].amsdu = tos_to_tid_inv[i]; | ||
386 | priv->aggr_prio_tbl[i].ampdu_ap = tos_to_tid_inv[i]; | ||
387 | priv->aggr_prio_tbl[i].ampdu_user = tos_to_tid_inv[i]; | ||
388 | priv->wmm.tid_tbl_ptr[i].ra_list_curr = NULL; | ||
389 | } | ||
390 | |||
391 | priv->aggr_prio_tbl[6].amsdu | ||
392 | = priv->aggr_prio_tbl[6].ampdu_ap | ||
393 | = priv->aggr_prio_tbl[6].ampdu_user | ||
394 | = BA_STREAM_NOT_ALLOWED; | ||
395 | |||
396 | priv->aggr_prio_tbl[7].amsdu = priv->aggr_prio_tbl[7].ampdu_ap | ||
397 | = priv->aggr_prio_tbl[7].ampdu_user | ||
398 | = BA_STREAM_NOT_ALLOWED; | ||
399 | |||
400 | priv->add_ba_param.timeout = MWIFIEX_DEFAULT_BLOCK_ACK_TIMEOUT; | ||
401 | priv->add_ba_param.tx_win_size = MWIFIEX_AMPDU_DEF_TXWINSIZE; | ||
402 | priv->add_ba_param.rx_win_size = MWIFIEX_AMPDU_DEF_RXWINSIZE; | ||
403 | } | ||
404 | } | ||
405 | |||
406 | /* | ||
407 | * This function checks if WMM Tx queue is empty. | ||
408 | */ | ||
409 | int | ||
410 | mwifiex_wmm_lists_empty(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 | for (i = 0; i < MAX_NUM_TID; i++) | ||
419 | if (!mwifiex_wmm_is_ra_list_empty(adapter, | ||
420 | &priv->wmm.tid_tbl_ptr[i].ra_list)) | ||
421 | return false; | ||
422 | } | ||
423 | } | ||
424 | |||
425 | return true; | ||
426 | } | ||
427 | |||
428 | /* | ||
429 | * This function deletes all packets in an RA list node. | ||
430 | * | ||
431 | * The packet sent completion callback handler are called with | ||
432 | * status failure, after they are dequeued to ensure proper | ||
433 | * cleanup. The RA list node itself is freed at the end. | ||
434 | */ | ||
435 | static void | ||
436 | mwifiex_wmm_del_pkts_in_ralist_node(struct mwifiex_private *priv, | ||
437 | struct mwifiex_ra_list_tbl *ra_list) | ||
438 | { | ||
439 | struct mwifiex_adapter *adapter = priv->adapter; | ||
440 | struct sk_buff *skb, *tmp; | ||
441 | |||
442 | skb_queue_walk_safe(&ra_list->skb_head, skb, tmp) | ||
443 | mwifiex_write_data_complete(adapter, skb, -1); | ||
444 | } | ||
445 | |||
446 | /* | ||
447 | * This function deletes all packets in an RA list. | ||
448 | * | ||
449 | * Each nodes in the RA list are freed individually first, and then | ||
450 | * the RA list itself is freed. | ||
451 | */ | ||
452 | static void | ||
453 | mwifiex_wmm_del_pkts_in_ralist(struct mwifiex_private *priv, | ||
454 | struct list_head *ra_list_head) | ||
455 | { | ||
456 | struct mwifiex_ra_list_tbl *ra_list; | ||
457 | |||
458 | list_for_each_entry(ra_list, ra_list_head, list) | ||
459 | mwifiex_wmm_del_pkts_in_ralist_node(priv, ra_list); | ||
460 | } | ||
461 | |||
462 | /* | ||
463 | * This function deletes all packets in all RA lists. | ||
464 | */ | ||
465 | static void mwifiex_wmm_cleanup_queues(struct mwifiex_private *priv) | ||
466 | { | ||
467 | int i; | ||
468 | |||
469 | for (i = 0; i < MAX_NUM_TID; i++) | ||
470 | mwifiex_wmm_del_pkts_in_ralist(priv, &priv->wmm.tid_tbl_ptr[i]. | ||
471 | ra_list); | ||
472 | } | ||
473 | |||
474 | /* | ||
475 | * This function deletes all route addresses from all RA lists. | ||
476 | */ | ||
477 | static void mwifiex_wmm_delete_all_ralist(struct mwifiex_private *priv) | ||
478 | { | ||
479 | struct mwifiex_ra_list_tbl *ra_list, *tmp_node; | ||
480 | int i; | ||
481 | |||
482 | for (i = 0; i < MAX_NUM_TID; ++i) { | ||
483 | dev_dbg(priv->adapter->dev, | ||
484 | "info: ra_list: freeing buf for tid %d\n", i); | ||
485 | list_for_each_entry_safe(ra_list, tmp_node, | ||
486 | &priv->wmm.tid_tbl_ptr[i].ra_list, list) { | ||
487 | list_del(&ra_list->list); | ||
488 | kfree(ra_list); | ||
489 | } | ||
490 | |||
491 | INIT_LIST_HEAD(&priv->wmm.tid_tbl_ptr[i].ra_list); | ||
492 | |||
493 | priv->wmm.tid_tbl_ptr[i].ra_list_curr = NULL; | ||
494 | } | ||
495 | } | ||
496 | |||
497 | /* | ||
498 | * This function cleans up the Tx and Rx queues. | ||
499 | * | ||
500 | * Cleanup includes - | ||
501 | * - All packets in RA lists | ||
502 | * - All entries in Rx reorder table | ||
503 | * - All entries in Tx BA stream table | ||
504 | * - MPA buffer (if required) | ||
505 | * - All RA lists | ||
506 | */ | ||
507 | void | ||
508 | mwifiex_clean_txrx(struct mwifiex_private *priv) | ||
509 | { | ||
510 | unsigned long flags; | ||
511 | |||
512 | mwifiex_11n_cleanup_reorder_tbl(priv); | ||
513 | spin_lock_irqsave(&priv->wmm.ra_list_spinlock, flags); | ||
514 | |||
515 | mwifiex_wmm_cleanup_queues(priv); | ||
516 | mwifiex_11n_delete_all_tx_ba_stream_tbl(priv); | ||
517 | |||
518 | if (priv->adapter->if_ops.cleanup_mpa_buf) | ||
519 | priv->adapter->if_ops.cleanup_mpa_buf(priv->adapter); | ||
520 | |||
521 | mwifiex_wmm_delete_all_ralist(priv); | ||
522 | memcpy(tos_to_tid, ac_to_tid, sizeof(tos_to_tid)); | ||
523 | |||
524 | spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, flags); | ||
525 | } | ||
526 | |||
527 | /* | ||
528 | * This function retrieves a particular RA list node, matching with the | ||
529 | * given TID and RA address. | ||
530 | */ | ||
531 | static struct mwifiex_ra_list_tbl * | ||
532 | mwifiex_wmm_get_ralist_node(struct mwifiex_private *priv, u8 tid, | ||
533 | u8 *ra_addr) | ||
534 | { | ||
535 | struct mwifiex_ra_list_tbl *ra_list; | ||
536 | |||
537 | list_for_each_entry(ra_list, &priv->wmm.tid_tbl_ptr[tid].ra_list, | ||
538 | list) { | ||
539 | if (!memcmp(ra_list->ra, ra_addr, ETH_ALEN)) | ||
540 | return ra_list; | ||
541 | } | ||
542 | |||
543 | return NULL; | ||
544 | } | ||
545 | |||
546 | /* | ||
547 | * This function retrieves an RA list node for a given TID and | ||
548 | * RA address pair. | ||
549 | * | ||
550 | * If no such node is found, a new node is added first and then | ||
551 | * retrieved. | ||
552 | */ | ||
553 | static struct mwifiex_ra_list_tbl * | ||
554 | mwifiex_wmm_get_queue_raptr(struct mwifiex_private *priv, u8 tid, u8 *ra_addr) | ||
555 | { | ||
556 | struct mwifiex_ra_list_tbl *ra_list; | ||
557 | |||
558 | ra_list = mwifiex_wmm_get_ralist_node(priv, tid, ra_addr); | ||
559 | if (ra_list) | ||
560 | return ra_list; | ||
561 | mwifiex_ralist_add(priv, ra_addr); | ||
562 | |||
563 | return mwifiex_wmm_get_ralist_node(priv, tid, ra_addr); | ||
564 | } | ||
565 | |||
566 | /* | ||
567 | * This function checks if a particular RA list node exists in a given TID | ||
568 | * table index. | ||
569 | */ | ||
570 | int | ||
571 | mwifiex_is_ralist_valid(struct mwifiex_private *priv, | ||
572 | struct mwifiex_ra_list_tbl *ra_list, int ptr_index) | ||
573 | { | ||
574 | struct mwifiex_ra_list_tbl *rlist; | ||
575 | |||
576 | list_for_each_entry(rlist, &priv->wmm.tid_tbl_ptr[ptr_index].ra_list, | ||
577 | list) { | ||
578 | if (rlist == ra_list) | ||
579 | return true; | ||
580 | } | ||
581 | |||
582 | return false; | ||
583 | } | ||
584 | |||
585 | /* | ||
586 | * This function adds a packet to WMM queue. | ||
587 | * | ||
588 | * In disconnected state the packet is immediately dropped and the | ||
589 | * packet send completion callback is called with status failure. | ||
590 | * | ||
591 | * Otherwise, the correct RA list node is located and the packet | ||
592 | * is queued at the list tail. | ||
593 | */ | ||
594 | void | ||
595 | mwifiex_wmm_add_buf_txqueue(struct mwifiex_adapter *adapter, | ||
596 | struct sk_buff *skb) | ||
597 | { | ||
598 | struct mwifiex_txinfo *tx_info = MWIFIEX_SKB_TXCB(skb); | ||
599 | struct mwifiex_private *priv = adapter->priv[tx_info->bss_index]; | ||
600 | u32 tid; | ||
601 | struct mwifiex_ra_list_tbl *ra_list; | ||
602 | u8 ra[ETH_ALEN], tid_down; | ||
603 | unsigned long flags; | ||
604 | |||
605 | if (!priv->media_connected) { | ||
606 | dev_dbg(adapter->dev, "data: drop packet in disconnect\n"); | ||
607 | mwifiex_write_data_complete(adapter, skb, -1); | ||
608 | return; | ||
609 | } | ||
610 | |||
611 | tid = skb->priority; | ||
612 | |||
613 | spin_lock_irqsave(&priv->wmm.ra_list_spinlock, flags); | ||
614 | |||
615 | tid_down = mwifiex_wmm_downgrade_tid(priv, tid); | ||
616 | |||
617 | /* In case of infra as we have already created the list during | ||
618 | association we just don't have to call get_queue_raptr, we will | ||
619 | have only 1 raptr for a tid in case of infra */ | ||
620 | if (!mwifiex_queuing_ra_based(priv)) { | ||
621 | if (!list_empty(&priv->wmm.tid_tbl_ptr[tid_down].ra_list)) | ||
622 | ra_list = list_first_entry( | ||
623 | &priv->wmm.tid_tbl_ptr[tid_down].ra_list, | ||
624 | struct mwifiex_ra_list_tbl, list); | ||
625 | else | ||
626 | ra_list = NULL; | ||
627 | } else { | ||
628 | memcpy(ra, skb->data, ETH_ALEN); | ||
629 | ra_list = mwifiex_wmm_get_queue_raptr(priv, tid_down, ra); | ||
630 | } | ||
631 | |||
632 | if (!ra_list) { | ||
633 | spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, flags); | ||
634 | mwifiex_write_data_complete(adapter, skb, -1); | ||
635 | return; | ||
636 | } | ||
637 | |||
638 | skb_queue_tail(&ra_list->skb_head, skb); | ||
639 | |||
640 | ra_list->total_pkts_size += skb->len; | ||
641 | |||
642 | spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, flags); | ||
643 | } | ||
644 | |||
645 | /* | ||
646 | * This function processes the get WMM status command response from firmware. | ||
647 | * | ||
648 | * The response may contain multiple TLVs - | ||
649 | * - AC Queue status TLVs | ||
650 | * - Current WMM Parameter IE TLV | ||
651 | * - Admission Control action frame TLVs | ||
652 | * | ||
653 | * This function parses the TLVs and then calls further specific functions | ||
654 | * to process any changes in the queue prioritize or state. | ||
655 | */ | ||
656 | int mwifiex_ret_wmm_get_status(struct mwifiex_private *priv, | ||
657 | const struct host_cmd_ds_command *resp) | ||
658 | { | ||
659 | u8 *curr = (u8 *) &resp->params.get_wmm_status; | ||
660 | uint16_t resp_len = le16_to_cpu(resp->size), tlv_len; | ||
661 | int valid = true; | ||
662 | |||
663 | struct mwifiex_ie_types_data *tlv_hdr; | ||
664 | struct mwifiex_ie_types_wmm_queue_status *tlv_wmm_qstatus; | ||
665 | struct ieee_types_wmm_parameter *wmm_param_ie = NULL; | ||
666 | struct mwifiex_wmm_ac_status *ac_status; | ||
667 | |||
668 | dev_dbg(priv->adapter->dev, "info: WMM: WMM_GET_STATUS cmdresp received: %d\n", | ||
669 | resp_len); | ||
670 | |||
671 | while ((resp_len >= sizeof(tlv_hdr->header)) && valid) { | ||
672 | tlv_hdr = (struct mwifiex_ie_types_data *) curr; | ||
673 | tlv_len = le16_to_cpu(tlv_hdr->header.len); | ||
674 | |||
675 | switch (le16_to_cpu(tlv_hdr->header.type)) { | ||
676 | case TLV_TYPE_WMMQSTATUS: | ||
677 | tlv_wmm_qstatus = | ||
678 | (struct mwifiex_ie_types_wmm_queue_status *) | ||
679 | tlv_hdr; | ||
680 | dev_dbg(priv->adapter->dev, | ||
681 | "info: CMD_RESP: WMM_GET_STATUS:" | ||
682 | " QSTATUS TLV: %d, %d, %d\n", | ||
683 | tlv_wmm_qstatus->queue_index, | ||
684 | tlv_wmm_qstatus->flow_required, | ||
685 | tlv_wmm_qstatus->disabled); | ||
686 | |||
687 | ac_status = &priv->wmm.ac_status[tlv_wmm_qstatus-> | ||
688 | queue_index]; | ||
689 | ac_status->disabled = tlv_wmm_qstatus->disabled; | ||
690 | ac_status->flow_required = | ||
691 | tlv_wmm_qstatus->flow_required; | ||
692 | ac_status->flow_created = tlv_wmm_qstatus->flow_created; | ||
693 | break; | ||
694 | |||
695 | case WLAN_EID_VENDOR_SPECIFIC: | ||
696 | /* | ||
697 | * Point the regular IEEE IE 2 bytes into the Marvell IE | ||
698 | * and setup the IEEE IE type and length byte fields | ||
699 | */ | ||
700 | |||
701 | wmm_param_ie = | ||
702 | (struct ieee_types_wmm_parameter *) (curr + | ||
703 | 2); | ||
704 | wmm_param_ie->vend_hdr.len = (u8) tlv_len; | ||
705 | wmm_param_ie->vend_hdr.element_id = | ||
706 | WLAN_EID_VENDOR_SPECIFIC; | ||
707 | |||
708 | dev_dbg(priv->adapter->dev, | ||
709 | "info: CMD_RESP: WMM_GET_STATUS:" | ||
710 | " WMM Parameter Set Count: %d\n", | ||
711 | wmm_param_ie->qos_info_bitmap & | ||
712 | IEEE80211_WMM_IE_AP_QOSINFO_PARAM_SET_CNT_MASK); | ||
713 | |||
714 | memcpy((u8 *) &priv->curr_bss_params.bss_descriptor. | ||
715 | wmm_ie, wmm_param_ie, | ||
716 | wmm_param_ie->vend_hdr.len + 2); | ||
717 | |||
718 | break; | ||
719 | |||
720 | default: | ||
721 | valid = false; | ||
722 | break; | ||
723 | } | ||
724 | |||
725 | curr += (tlv_len + sizeof(tlv_hdr->header)); | ||
726 | resp_len -= (tlv_len + sizeof(tlv_hdr->header)); | ||
727 | } | ||
728 | |||
729 | mwifiex_wmm_setup_queue_priorities(priv, wmm_param_ie); | ||
730 | mwifiex_wmm_setup_ac_downgrade(priv); | ||
731 | |||
732 | return 0; | ||
733 | } | ||
734 | |||
735 | /* | ||
736 | * Callback handler from the command module to allow insertion of a WMM TLV. | ||
737 | * | ||
738 | * If the BSS we are associating to supports WMM, this function adds the | ||
739 | * required WMM Information IE to the association request command buffer in | ||
740 | * the form of a Marvell extended IEEE IE. | ||
741 | */ | ||
742 | u32 | ||
743 | mwifiex_wmm_process_association_req(struct mwifiex_private *priv, | ||
744 | u8 **assoc_buf, | ||
745 | struct ieee_types_wmm_parameter *wmm_ie, | ||
746 | struct ieee80211_ht_cap *ht_cap) | ||
747 | { | ||
748 | struct mwifiex_ie_types_wmm_param_set *wmm_tlv; | ||
749 | u32 ret_len = 0; | ||
750 | |||
751 | /* Null checks */ | ||
752 | if (!assoc_buf) | ||
753 | return 0; | ||
754 | if (!(*assoc_buf)) | ||
755 | return 0; | ||
756 | |||
757 | if (!wmm_ie) | ||
758 | return 0; | ||
759 | |||
760 | dev_dbg(priv->adapter->dev, "info: WMM: process assoc req:" | ||
761 | "bss->wmmIe=0x%x\n", | ||
762 | wmm_ie->vend_hdr.element_id); | ||
763 | |||
764 | if ((priv->wmm_required | ||
765 | || (ht_cap && (priv->adapter->config_bands & BAND_GN | ||
766 | || priv->adapter->config_bands & BAND_AN)) | ||
767 | ) | ||
768 | && wmm_ie->vend_hdr.element_id == WLAN_EID_VENDOR_SPECIFIC) { | ||
769 | wmm_tlv = (struct mwifiex_ie_types_wmm_param_set *) *assoc_buf; | ||
770 | wmm_tlv->header.type = cpu_to_le16((u16) wmm_info_ie[0]); | ||
771 | wmm_tlv->header.len = cpu_to_le16((u16) wmm_info_ie[1]); | ||
772 | memcpy(wmm_tlv->wmm_ie, &wmm_info_ie[2], | ||
773 | le16_to_cpu(wmm_tlv->header.len)); | ||
774 | if (wmm_ie->qos_info_bitmap & IEEE80211_WMM_IE_AP_QOSINFO_UAPSD) | ||
775 | memcpy((u8 *) (wmm_tlv->wmm_ie | ||
776 | + le16_to_cpu(wmm_tlv->header.len) | ||
777 | - sizeof(priv->wmm_qosinfo)), | ||
778 | &priv->wmm_qosinfo, | ||
779 | sizeof(priv->wmm_qosinfo)); | ||
780 | |||
781 | ret_len = sizeof(wmm_tlv->header) | ||
782 | + le16_to_cpu(wmm_tlv->header.len); | ||
783 | |||
784 | *assoc_buf += ret_len; | ||
785 | } | ||
786 | |||
787 | return ret_len; | ||
788 | } | ||
789 | |||
790 | /* | ||
791 | * This function computes the time delay in the driver queues for a | ||
792 | * given packet. | ||
793 | * | ||
794 | * When the packet is received at the OS/Driver interface, the current | ||
795 | * time is set in the packet structure. The difference between the present | ||
796 | * time and that received time is computed in this function and limited | ||
797 | * based on pre-compiled limits in the driver. | ||
798 | */ | ||
799 | u8 | ||
800 | mwifiex_wmm_compute_drv_pkt_delay(struct mwifiex_private *priv, | ||
801 | const struct sk_buff *skb) | ||
802 | { | ||
803 | u8 ret_val = 0; | ||
804 | struct timeval out_tstamp, in_tstamp; | ||
805 | u32 queue_delay; | ||
806 | |||
807 | do_gettimeofday(&out_tstamp); | ||
808 | in_tstamp = ktime_to_timeval(skb->tstamp); | ||
809 | |||
810 | queue_delay = (out_tstamp.tv_sec - in_tstamp.tv_sec) * 1000; | ||
811 | queue_delay += (out_tstamp.tv_usec - in_tstamp.tv_usec) / 1000; | ||
812 | |||
813 | /* | ||
814 | * Queue delay is passed as a uint8 in units of 2ms (ms shifted | ||
815 | * by 1). Min value (other than 0) is therefore 2ms, max is 510ms. | ||
816 | * | ||
817 | * Pass max value if queue_delay is beyond the uint8 range | ||
818 | */ | ||
819 | ret_val = (u8) (min(queue_delay, priv->wmm.drv_pkt_delay_max) >> 1); | ||
820 | |||
821 | dev_dbg(priv->adapter->dev, "data: WMM: Pkt Delay: %d ms," | ||
822 | " %d ms sent to FW\n", queue_delay, ret_val); | ||
823 | |||
824 | return ret_val; | ||
825 | } | ||
826 | |||
827 | /* | ||
828 | * This function retrieves the highest priority RA list table pointer. | ||
829 | */ | ||
830 | static struct mwifiex_ra_list_tbl * | ||
831 | mwifiex_wmm_get_highest_priolist_ptr(struct mwifiex_adapter *adapter, | ||
832 | struct mwifiex_private **priv, int *tid) | ||
833 | { | ||
834 | struct mwifiex_private *priv_tmp; | ||
835 | struct mwifiex_ra_list_tbl *ptr, *head; | ||
836 | struct mwifiex_bss_prio_node *bssprio_node, *bssprio_head; | ||
837 | struct mwifiex_tid_tbl *tid_ptr; | ||
838 | int is_list_empty; | ||
839 | unsigned long flags; | ||
840 | int i, j; | ||
841 | |||
842 | for (j = adapter->priv_num - 1; j >= 0; --j) { | ||
843 | spin_lock_irqsave(&adapter->bss_prio_tbl[j].bss_prio_lock, | ||
844 | flags); | ||
845 | is_list_empty = list_empty(&adapter->bss_prio_tbl[j] | ||
846 | .bss_prio_head); | ||
847 | spin_unlock_irqrestore(&adapter->bss_prio_tbl[j].bss_prio_lock, | ||
848 | flags); | ||
849 | if (is_list_empty) | ||
850 | continue; | ||
851 | |||
852 | if (adapter->bss_prio_tbl[j].bss_prio_cur == | ||
853 | (struct mwifiex_bss_prio_node *) | ||
854 | &adapter->bss_prio_tbl[j].bss_prio_head) { | ||
855 | bssprio_node = | ||
856 | list_first_entry(&adapter->bss_prio_tbl[j] | ||
857 | .bss_prio_head, | ||
858 | struct mwifiex_bss_prio_node, | ||
859 | list); | ||
860 | bssprio_head = bssprio_node; | ||
861 | } else { | ||
862 | bssprio_node = adapter->bss_prio_tbl[j].bss_prio_cur; | ||
863 | bssprio_head = bssprio_node; | ||
864 | } | ||
865 | |||
866 | do { | ||
867 | priv_tmp = bssprio_node->priv; | ||
868 | |||
869 | for (i = HIGH_PRIO_TID; i >= LOW_PRIO_TID; --i) { | ||
870 | |||
871 | tid_ptr = &(priv_tmp)->wmm. | ||
872 | tid_tbl_ptr[tos_to_tid[i]]; | ||
873 | |||
874 | spin_lock_irqsave(&tid_ptr->tid_tbl_lock, | ||
875 | flags); | ||
876 | is_list_empty = | ||
877 | list_empty(&adapter->bss_prio_tbl[j] | ||
878 | .bss_prio_head); | ||
879 | spin_unlock_irqrestore(&tid_ptr->tid_tbl_lock, | ||
880 | flags); | ||
881 | if (is_list_empty) | ||
882 | continue; | ||
883 | |||
884 | /* | ||
885 | * Always choose the next ra we transmitted | ||
886 | * last time, this way we pick the ra's in | ||
887 | * round robin fashion. | ||
888 | */ | ||
889 | ptr = list_first_entry( | ||
890 | &tid_ptr->ra_list_curr->list, | ||
891 | struct mwifiex_ra_list_tbl, | ||
892 | list); | ||
893 | |||
894 | head = ptr; | ||
895 | if (ptr == (struct mwifiex_ra_list_tbl *) | ||
896 | &tid_ptr->ra_list) { | ||
897 | /* Get next ra */ | ||
898 | ptr = list_first_entry(&ptr->list, | ||
899 | struct mwifiex_ra_list_tbl, list); | ||
900 | head = ptr; | ||
901 | } | ||
902 | |||
903 | do { | ||
904 | is_list_empty = | ||
905 | skb_queue_empty(&ptr->skb_head); | ||
906 | if (!is_list_empty) { | ||
907 | *priv = priv_tmp; | ||
908 | *tid = tos_to_tid[i]; | ||
909 | return ptr; | ||
910 | } | ||
911 | /* Get next ra */ | ||
912 | ptr = list_first_entry(&ptr->list, | ||
913 | struct mwifiex_ra_list_tbl, | ||
914 | list); | ||
915 | if (ptr == | ||
916 | (struct mwifiex_ra_list_tbl *) | ||
917 | &tid_ptr->ra_list) | ||
918 | ptr = list_first_entry( | ||
919 | &ptr->list, | ||
920 | struct mwifiex_ra_list_tbl, | ||
921 | list); | ||
922 | } while (ptr != head); | ||
923 | } | ||
924 | |||
925 | /* Get next bss priority node */ | ||
926 | bssprio_node = list_first_entry(&bssprio_node->list, | ||
927 | struct mwifiex_bss_prio_node, | ||
928 | list); | ||
929 | |||
930 | if (bssprio_node == | ||
931 | (struct mwifiex_bss_prio_node *) | ||
932 | &adapter->bss_prio_tbl[j].bss_prio_head) | ||
933 | /* Get next bss priority node */ | ||
934 | bssprio_node = list_first_entry( | ||
935 | &bssprio_node->list, | ||
936 | struct mwifiex_bss_prio_node, | ||
937 | list); | ||
938 | } while (bssprio_node != bssprio_head); | ||
939 | } | ||
940 | return NULL; | ||
941 | } | ||
942 | |||
943 | /* | ||
944 | * This function gets the number of packets in the Tx queue of a | ||
945 | * particular RA list. | ||
946 | */ | ||
947 | static int | ||
948 | mwifiex_num_pkts_in_txq(struct mwifiex_private *priv, | ||
949 | struct mwifiex_ra_list_tbl *ptr, int max_buf_size) | ||
950 | { | ||
951 | int count = 0, total_size = 0; | ||
952 | struct sk_buff *skb, *tmp; | ||
953 | |||
954 | skb_queue_walk_safe(&ptr->skb_head, skb, tmp) { | ||
955 | total_size += skb->len; | ||
956 | if (total_size < max_buf_size) | ||
957 | ++count; | ||
958 | else | ||
959 | break; | ||
960 | } | ||
961 | |||
962 | return count; | ||
963 | } | ||
964 | |||
965 | /* | ||
966 | * This function sends a single packet to firmware for transmission. | ||
967 | */ | ||
968 | static void | ||
969 | mwifiex_send_single_packet(struct mwifiex_private *priv, | ||
970 | struct mwifiex_ra_list_tbl *ptr, int ptr_index, | ||
971 | unsigned long ra_list_flags) | ||
972 | __releases(&priv->wmm.ra_list_spinlock) | ||
973 | { | ||
974 | struct sk_buff *skb, *skb_next; | ||
975 | struct mwifiex_tx_param tx_param; | ||
976 | struct mwifiex_adapter *adapter = priv->adapter; | ||
977 | int status = 0; | ||
978 | struct mwifiex_txinfo *tx_info; | ||
979 | |||
980 | if (skb_queue_empty(&ptr->skb_head)) { | ||
981 | spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, | ||
982 | ra_list_flags); | ||
983 | dev_dbg(adapter->dev, "data: nothing to send\n"); | ||
984 | return; | ||
985 | } | ||
986 | |||
987 | skb = skb_dequeue(&ptr->skb_head); | ||
988 | |||
989 | tx_info = MWIFIEX_SKB_TXCB(skb); | ||
990 | dev_dbg(adapter->dev, "data: dequeuing the packet %p %p\n", ptr, skb); | ||
991 | |||
992 | ptr->total_pkts_size -= skb->len; | ||
993 | |||
994 | if (!skb_queue_empty(&ptr->skb_head)) | ||
995 | skb_next = skb_peek(&ptr->skb_head); | ||
996 | else | ||
997 | skb_next = NULL; | ||
998 | |||
999 | spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, ra_list_flags); | ||
1000 | |||
1001 | tx_param.next_pkt_len = ((skb_next) ? skb_next->len + | ||
1002 | sizeof(struct txpd) : 0); | ||
1003 | |||
1004 | status = mwifiex_process_tx(priv, skb, &tx_param); | ||
1005 | |||
1006 | if (status == -EBUSY) { | ||
1007 | /* Queue the packet back at the head */ | ||
1008 | spin_lock_irqsave(&priv->wmm.ra_list_spinlock, ra_list_flags); | ||
1009 | |||
1010 | if (!mwifiex_is_ralist_valid(priv, ptr, ptr_index)) { | ||
1011 | spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, | ||
1012 | ra_list_flags); | ||
1013 | mwifiex_write_data_complete(adapter, skb, -1); | ||
1014 | return; | ||
1015 | } | ||
1016 | |||
1017 | skb_queue_tail(&ptr->skb_head, skb); | ||
1018 | |||
1019 | ptr->total_pkts_size += skb->len; | ||
1020 | tx_info->flags |= MWIFIEX_BUF_FLAG_REQUEUED_PKT; | ||
1021 | spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, | ||
1022 | ra_list_flags); | ||
1023 | } else { | ||
1024 | spin_lock_irqsave(&priv->wmm.ra_list_spinlock, ra_list_flags); | ||
1025 | if (mwifiex_is_ralist_valid(priv, ptr, ptr_index)) { | ||
1026 | priv->wmm.packets_out[ptr_index]++; | ||
1027 | priv->wmm.tid_tbl_ptr[ptr_index].ra_list_curr = ptr; | ||
1028 | } | ||
1029 | adapter->bss_prio_tbl[priv->bss_priority].bss_prio_cur = | ||
1030 | list_first_entry( | ||
1031 | &adapter->bss_prio_tbl[priv->bss_priority] | ||
1032 | .bss_prio_cur->list, | ||
1033 | struct mwifiex_bss_prio_node, | ||
1034 | list); | ||
1035 | spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, | ||
1036 | ra_list_flags); | ||
1037 | } | ||
1038 | } | ||
1039 | |||
1040 | /* | ||
1041 | * This function checks if the first packet in the given RA list | ||
1042 | * is already processed or not. | ||
1043 | */ | ||
1044 | static int | ||
1045 | mwifiex_is_ptr_processed(struct mwifiex_private *priv, | ||
1046 | struct mwifiex_ra_list_tbl *ptr) | ||
1047 | { | ||
1048 | struct sk_buff *skb; | ||
1049 | struct mwifiex_txinfo *tx_info; | ||
1050 | |||
1051 | if (skb_queue_empty(&ptr->skb_head)) | ||
1052 | return false; | ||
1053 | |||
1054 | skb = skb_peek(&ptr->skb_head); | ||
1055 | |||
1056 | tx_info = MWIFIEX_SKB_TXCB(skb); | ||
1057 | if (tx_info->flags & MWIFIEX_BUF_FLAG_REQUEUED_PKT) | ||
1058 | return true; | ||
1059 | |||
1060 | return false; | ||
1061 | } | ||
1062 | |||
1063 | /* | ||
1064 | * This function sends a single processed packet to firmware for | ||
1065 | * transmission. | ||
1066 | */ | ||
1067 | static void | ||
1068 | mwifiex_send_processed_packet(struct mwifiex_private *priv, | ||
1069 | struct mwifiex_ra_list_tbl *ptr, int ptr_index, | ||
1070 | unsigned long ra_list_flags) | ||
1071 | __releases(&priv->wmm.ra_list_spinlock) | ||
1072 | { | ||
1073 | struct mwifiex_tx_param tx_param; | ||
1074 | struct mwifiex_adapter *adapter = priv->adapter; | ||
1075 | int ret = -1; | ||
1076 | struct sk_buff *skb, *skb_next; | ||
1077 | struct mwifiex_txinfo *tx_info; | ||
1078 | |||
1079 | if (skb_queue_empty(&ptr->skb_head)) { | ||
1080 | spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, | ||
1081 | ra_list_flags); | ||
1082 | return; | ||
1083 | } | ||
1084 | |||
1085 | skb = skb_dequeue(&ptr->skb_head); | ||
1086 | |||
1087 | if (!skb_queue_empty(&ptr->skb_head)) | ||
1088 | skb_next = skb_peek(&ptr->skb_head); | ||
1089 | else | ||
1090 | skb_next = NULL; | ||
1091 | |||
1092 | tx_info = MWIFIEX_SKB_TXCB(skb); | ||
1093 | |||
1094 | spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, ra_list_flags); | ||
1095 | tx_param.next_pkt_len = | ||
1096 | ((skb_next) ? skb_next->len + | ||
1097 | sizeof(struct txpd) : 0); | ||
1098 | ret = adapter->if_ops.host_to_card(adapter, MWIFIEX_TYPE_DATA, | ||
1099 | skb->data, skb->len, &tx_param); | ||
1100 | switch (ret) { | ||
1101 | case -EBUSY: | ||
1102 | dev_dbg(adapter->dev, "data: -EBUSY is returned\n"); | ||
1103 | spin_lock_irqsave(&priv->wmm.ra_list_spinlock, ra_list_flags); | ||
1104 | |||
1105 | if (!mwifiex_is_ralist_valid(priv, ptr, ptr_index)) { | ||
1106 | spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, | ||
1107 | ra_list_flags); | ||
1108 | mwifiex_write_data_complete(adapter, skb, -1); | ||
1109 | return; | ||
1110 | } | ||
1111 | |||
1112 | skb_queue_tail(&ptr->skb_head, skb); | ||
1113 | |||
1114 | tx_info->flags |= MWIFIEX_BUF_FLAG_REQUEUED_PKT; | ||
1115 | spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, | ||
1116 | ra_list_flags); | ||
1117 | break; | ||
1118 | case -1: | ||
1119 | adapter->data_sent = false; | ||
1120 | dev_err(adapter->dev, "host_to_card failed: %#x\n", ret); | ||
1121 | adapter->dbg.num_tx_host_to_card_failure++; | ||
1122 | mwifiex_write_data_complete(adapter, skb, ret); | ||
1123 | break; | ||
1124 | case -EINPROGRESS: | ||
1125 | adapter->data_sent = false; | ||
1126 | default: | ||
1127 | break; | ||
1128 | } | ||
1129 | if (ret != -EBUSY) { | ||
1130 | spin_lock_irqsave(&priv->wmm.ra_list_spinlock, ra_list_flags); | ||
1131 | if (mwifiex_is_ralist_valid(priv, ptr, ptr_index)) { | ||
1132 | priv->wmm.packets_out[ptr_index]++; | ||
1133 | priv->wmm.tid_tbl_ptr[ptr_index].ra_list_curr = ptr; | ||
1134 | } | ||
1135 | adapter->bss_prio_tbl[priv->bss_priority].bss_prio_cur = | ||
1136 | list_first_entry( | ||
1137 | &adapter->bss_prio_tbl[priv->bss_priority] | ||
1138 | .bss_prio_cur->list, | ||
1139 | struct mwifiex_bss_prio_node, | ||
1140 | list); | ||
1141 | spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, | ||
1142 | ra_list_flags); | ||
1143 | } | ||
1144 | } | ||
1145 | |||
1146 | /* | ||
1147 | * This function dequeues a packet from the highest priority list | ||
1148 | * and transmits it. | ||
1149 | */ | ||
1150 | static int | ||
1151 | mwifiex_dequeue_tx_packet(struct mwifiex_adapter *adapter) | ||
1152 | { | ||
1153 | struct mwifiex_ra_list_tbl *ptr; | ||
1154 | struct mwifiex_private *priv = NULL; | ||
1155 | int ptr_index = 0; | ||
1156 | u8 ra[ETH_ALEN]; | ||
1157 | int tid_del = 0, tid = 0; | ||
1158 | unsigned long flags; | ||
1159 | |||
1160 | ptr = mwifiex_wmm_get_highest_priolist_ptr(adapter, &priv, &ptr_index); | ||
1161 | if (!ptr) | ||
1162 | return -1; | ||
1163 | |||
1164 | tid = mwifiex_get_tid(priv->adapter, ptr); | ||
1165 | |||
1166 | dev_dbg(adapter->dev, "data: tid=%d\n", tid); | ||
1167 | |||
1168 | spin_lock_irqsave(&priv->wmm.ra_list_spinlock, flags); | ||
1169 | if (!mwifiex_is_ralist_valid(priv, ptr, ptr_index)) { | ||
1170 | spin_unlock_irqrestore(&priv->wmm.ra_list_spinlock, flags); | ||
1171 | return -1; | ||
1172 | } | ||
1173 | |||
1174 | if (mwifiex_is_ptr_processed(priv, ptr)) { | ||
1175 | mwifiex_send_processed_packet(priv, ptr, ptr_index, flags); | ||
1176 | /* ra_list_spinlock has been freed in | ||
1177 | mwifiex_send_processed_packet() */ | ||
1178 | return 0; | ||
1179 | } | ||
1180 | |||
1181 | if (!ptr->is_11n_enabled || mwifiex_is_ba_stream_setup(priv, ptr, tid) | ||
1182 | || ((priv->sec_info.wpa_enabled | ||
1183 | || priv->sec_info.wpa2_enabled) && !priv->wpa_is_gtk_set) | ||
1184 | ) { | ||
1185 | mwifiex_send_single_packet(priv, ptr, ptr_index, flags); | ||
1186 | /* ra_list_spinlock has been freed in | ||
1187 | mwifiex_send_single_packet() */ | ||
1188 | } else { | ||
1189 | if (mwifiex_is_ampdu_allowed(priv, ptr, tid)) { | ||
1190 | if (mwifiex_is_ba_stream_avail(priv)) { | ||
1191 | mwifiex_11n_create_tx_ba_stream_tbl(priv, | ||
1192 | ptr->ra, tid, | ||
1193 | BA_STREAM_SETUP_INPROGRESS); | ||
1194 | mwifiex_send_addba(priv, tid, ptr->ra); | ||
1195 | } else if (mwifiex_find_stream_to_delete | ||
1196 | (priv, ptr, tid, &tid_del, ra)) { | ||
1197 | mwifiex_11n_create_tx_ba_stream_tbl(priv, | ||
1198 | ptr->ra, tid, | ||
1199 | BA_STREAM_SETUP_INPROGRESS); | ||
1200 | mwifiex_send_delba(priv, tid_del, ra, 1); | ||
1201 | } | ||
1202 | } | ||
1203 | /* Minimum number of AMSDU */ | ||
1204 | #define MIN_NUM_AMSDU 2 | ||
1205 | if (mwifiex_is_amsdu_allowed(priv, ptr, tid) && | ||
1206 | (mwifiex_num_pkts_in_txq(priv, ptr, adapter->tx_buf_size) >= | ||
1207 | MIN_NUM_AMSDU)) | ||
1208 | mwifiex_11n_aggregate_pkt(priv, ptr, INTF_HEADER_LEN, | ||
1209 | ptr_index, flags); | ||
1210 | /* ra_list_spinlock has been freed in | ||
1211 | mwifiex_11n_aggregate_pkt() */ | ||
1212 | else | ||
1213 | mwifiex_send_single_packet(priv, ptr, ptr_index, flags); | ||
1214 | /* ra_list_spinlock has been freed in | ||
1215 | mwifiex_send_single_packet() */ | ||
1216 | } | ||
1217 | return 0; | ||
1218 | } | ||
1219 | |||
1220 | /* | ||
1221 | * This function transmits the highest priority packet awaiting in the | ||
1222 | * WMM Queues. | ||
1223 | */ | ||
1224 | void | ||
1225 | mwifiex_wmm_process_tx(struct mwifiex_adapter *adapter) | ||
1226 | { | ||
1227 | do { | ||
1228 | /* Check if busy */ | ||
1229 | if (adapter->data_sent || adapter->tx_lock_flag) | ||
1230 | break; | ||
1231 | |||
1232 | if (mwifiex_dequeue_tx_packet(adapter)) | ||
1233 | break; | ||
1234 | } while (true); | ||
1235 | |||
1236 | return; | ||
1237 | } | ||