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Commit | Line | Data |
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f0706e82 JB |
1 | /* |
2 | * Copyright 2004, Instant802 Networks, Inc. | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify | |
5 | * it under the terms of the GNU General Public License version 2 as | |
6 | * published by the Free Software Foundation. | |
7 | */ | |
8 | ||
9 | #include <linux/netdevice.h> | |
10 | #include <linux/skbuff.h> | |
11 | #include <linux/module.h> | |
12 | #include <linux/if_arp.h> | |
13 | #include <linux/types.h> | |
14 | #include <net/ip.h> | |
15 | #include <net/pkt_sched.h> | |
16 | ||
17 | #include <net/mac80211.h> | |
18 | #include "ieee80211_i.h" | |
19 | #include "wme.h" | |
20 | ||
f0706e82 | 21 | /* maximum number of hardware queues we support. */ |
e100bb64 JB |
22 | #define QD_MAX_QUEUES (IEEE80211_MAX_AMPDU_QUEUES + IEEE80211_MAX_QUEUES) |
23 | /* current number of hardware queues we support. */ | |
24 | #define QD_NUM(hw) ((hw)->queues + (hw)->ampdu_queues) | |
9e723492 | 25 | |
e100bb64 JB |
26 | /* |
27 | * Default mapping in classifier to work with default | |
28 | * queue setup. | |
29 | */ | |
9e723492 | 30 | const int ieee802_1d_to_ac[8] = { 2, 3, 3, 2, 1, 1, 0, 0 }; |
f0706e82 JB |
31 | |
32 | struct ieee80211_sched_data | |
33 | { | |
e100bb64 | 34 | unsigned long qdisc_pool[BITS_TO_LONGS(QD_MAX_QUEUES)]; |
f0706e82 | 35 | struct tcf_proto *filter_list; |
e100bb64 JB |
36 | struct Qdisc *queues[QD_MAX_QUEUES]; |
37 | struct sk_buff_head requeued[QD_MAX_QUEUES]; | |
f0706e82 JB |
38 | }; |
39 | ||
a8bdf29c | 40 | static const char llc_ip_hdr[8] = {0xAA, 0xAA, 0x3, 0, 0, 0, 0x08, 0}; |
f0706e82 JB |
41 | |
42 | /* given a data frame determine the 802.1p/1d tag to use */ | |
43 | static inline unsigned classify_1d(struct sk_buff *skb, struct Qdisc *qd) | |
44 | { | |
45 | struct iphdr *ip; | |
46 | int dscp; | |
47 | int offset; | |
48 | ||
49 | struct ieee80211_sched_data *q = qdisc_priv(qd); | |
50 | struct tcf_result res = { -1, 0 }; | |
51 | ||
52 | /* if there is a user set filter list, call out to that */ | |
53 | if (q->filter_list) { | |
54 | tc_classify(skb, q->filter_list, &res); | |
55 | if (res.class != -1) | |
56 | return res.class; | |
57 | } | |
58 | ||
59 | /* skb->priority values from 256->263 are magic values to | |
60 | * directly indicate a specific 802.1d priority. | |
61 | * This is used to allow 802.1d priority to be passed directly in | |
62 | * from VLAN tags, etc. */ | |
63 | if (skb->priority >= 256 && skb->priority <= 263) | |
64 | return skb->priority - 256; | |
65 | ||
66 | /* check there is a valid IP header present */ | |
a8bdf29c GC |
67 | offset = ieee80211_get_hdrlen_from_skb(skb); |
68 | if (skb->len < offset + sizeof(llc_ip_hdr) + sizeof(*ip) || | |
69 | memcmp(skb->data + offset, llc_ip_hdr, sizeof(llc_ip_hdr))) | |
f0706e82 JB |
70 | return 0; |
71 | ||
a8bdf29c | 72 | ip = (struct iphdr *) (skb->data + offset + sizeof(llc_ip_hdr)); |
f0706e82 JB |
73 | |
74 | dscp = ip->tos & 0xfc; | |
75 | if (dscp & 0x1c) | |
76 | return 0; | |
77 | return dscp >> 5; | |
78 | } | |
79 | ||
80 | ||
81 | static inline int wme_downgrade_ac(struct sk_buff *skb) | |
82 | { | |
83 | switch (skb->priority) { | |
84 | case 6: | |
85 | case 7: | |
86 | skb->priority = 5; /* VO -> VI */ | |
87 | return 0; | |
88 | case 4: | |
89 | case 5: | |
90 | skb->priority = 3; /* VI -> BE */ | |
91 | return 0; | |
92 | case 0: | |
93 | case 3: | |
94 | skb->priority = 2; /* BE -> BK */ | |
95 | return 0; | |
96 | default: | |
97 | return -1; | |
98 | } | |
99 | } | |
100 | ||
101 | ||
102 | /* positive return value indicates which queue to use | |
103 | * negative return value indicates to drop the frame */ | |
e100bb64 | 104 | static int classify80211(struct sk_buff *skb, struct Qdisc *qd) |
f0706e82 JB |
105 | { |
106 | struct ieee80211_local *local = wdev_priv(qd->dev->ieee80211_ptr); | |
f0706e82 | 107 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; |
f0706e82 | 108 | |
002aaf4e | 109 | if (!ieee80211_is_data(hdr->frame_control)) { |
f0706e82 JB |
110 | /* management frames go on AC_VO queue, but are sent |
111 | * without QoS control fields */ | |
e100bb64 | 112 | return 0; |
f0706e82 JB |
113 | } |
114 | ||
f9d540ee JB |
115 | if (0 /* injected */) { |
116 | /* use AC from radiotap */ | |
f0706e82 JB |
117 | } |
118 | ||
002aaf4e | 119 | if (!ieee80211_is_data_qos(hdr->frame_control)) { |
f0706e82 JB |
120 | skb->priority = 0; /* required for correct WPA/11i MIC */ |
121 | return ieee802_1d_to_ac[skb->priority]; | |
122 | } | |
123 | ||
124 | /* use the data classifier to determine what 802.1d tag the | |
3c3b00ca | 125 | * data frame has */ |
f0706e82 JB |
126 | skb->priority = classify_1d(skb, qd); |
127 | ||
3c3b00ca | 128 | /* in case we are a client verify acm is not set for this ac */ |
f0706e82 JB |
129 | while (unlikely(local->wmm_acm & BIT(skb->priority))) { |
130 | if (wme_downgrade_ac(skb)) { | |
3c3b00ca | 131 | /* No AC with lower priority has acm=0, drop packet. */ |
f0706e82 JB |
132 | return -1; |
133 | } | |
134 | } | |
135 | ||
136 | /* look up which queue to use for frames with this 1d tag */ | |
137 | return ieee802_1d_to_ac[skb->priority]; | |
138 | } | |
139 | ||
140 | ||
141 | static int wme_qdiscop_enqueue(struct sk_buff *skb, struct Qdisc* qd) | |
142 | { | |
143 | struct ieee80211_local *local = wdev_priv(qd->dev->ieee80211_ptr); | |
e100bb64 | 144 | struct ieee80211_hw *hw = &local->hw; |
f0706e82 | 145 | struct ieee80211_sched_data *q = qdisc_priv(qd); |
e039fa4a | 146 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
f0706e82 | 147 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; |
f0706e82 | 148 | struct Qdisc *qdisc; |
9e723492 | 149 | struct sta_info *sta; |
5c5e1289 | 150 | int err, queue; |
9e723492 | 151 | u8 tid; |
f0706e82 | 152 | |
e039fa4a | 153 | if (info->flags & IEEE80211_TX_CTL_REQUEUE) { |
e2530083 | 154 | queue = skb_get_queue_mapping(skb); |
d0709a65 | 155 | rcu_read_lock(); |
9e723492 RR |
156 | sta = sta_info_get(local, hdr->addr1); |
157 | tid = skb->priority & QOS_CONTROL_TAG1D_MASK; | |
158 | if (sta) { | |
159 | int ampdu_queue = sta->tid_to_tx_q[tid]; | |
e100bb64 | 160 | if ((ampdu_queue < QD_NUM(hw)) && |
a9af2013 | 161 | test_bit(ampdu_queue, q->qdisc_pool)) { |
9e723492 | 162 | queue = ampdu_queue; |
e039fa4a | 163 | info->flags |= IEEE80211_TX_CTL_AMPDU; |
9e723492 | 164 | } else { |
e039fa4a | 165 | info->flags &= ~IEEE80211_TX_CTL_AMPDU; |
9e723492 | 166 | } |
9e723492 | 167 | } |
d0709a65 | 168 | rcu_read_unlock(); |
9e723492 | 169 | skb_queue_tail(&q->requeued[queue], skb); |
f0706e82 JB |
170 | qd->q.qlen++; |
171 | return 0; | |
172 | } | |
173 | ||
174 | queue = classify80211(skb, qd); | |
175 | ||
e100bb64 JB |
176 | if (unlikely(queue >= local->hw.queues)) |
177 | queue = local->hw.queues - 1; | |
178 | ||
f0706e82 JB |
179 | /* now we know the 1d priority, fill in the QoS header if there is one |
180 | */ | |
002aaf4e HH |
181 | if (ieee80211_is_data_qos(hdr->frame_control)) { |
182 | u8 *p = ieee80211_get_qos_ctl(hdr); | |
9e723492 RR |
183 | u8 ack_policy = 0; |
184 | tid = skb->priority & QOS_CONTROL_TAG1D_MASK; | |
f0706e82 | 185 | if (local->wifi_wme_noack_test) |
9e723492 | 186 | ack_policy |= QOS_CONTROL_ACK_POLICY_NOACK << |
f0706e82 JB |
187 | QOS_CONTROL_ACK_POLICY_SHIFT; |
188 | /* qos header is 2 bytes, second reserved */ | |
002aaf4e | 189 | *p++ = ack_policy | tid; |
f0706e82 | 190 | *p = 0; |
9e723492 | 191 | |
d0709a65 JB |
192 | rcu_read_lock(); |
193 | ||
9e723492 RR |
194 | sta = sta_info_get(local, hdr->addr1); |
195 | if (sta) { | |
196 | int ampdu_queue = sta->tid_to_tx_q[tid]; | |
e100bb64 JB |
197 | if ((ampdu_queue < QD_NUM(hw)) && |
198 | test_bit(ampdu_queue, q->qdisc_pool)) { | |
9e723492 | 199 | queue = ampdu_queue; |
e039fa4a | 200 | info->flags |= IEEE80211_TX_CTL_AMPDU; |
9e723492 | 201 | } else { |
e039fa4a | 202 | info->flags &= ~IEEE80211_TX_CTL_AMPDU; |
9e723492 | 203 | } |
9e723492 | 204 | } |
d0709a65 JB |
205 | |
206 | rcu_read_unlock(); | |
f0706e82 JB |
207 | } |
208 | ||
5c5e1289 JB |
209 | if (unlikely(queue < 0)) { |
210 | kfree_skb(skb); | |
211 | err = NET_XMIT_DROP; | |
212 | } else { | |
e2530083 | 213 | skb_set_queue_mapping(skb, queue); |
5c5e1289 JB |
214 | qdisc = q->queues[queue]; |
215 | err = qdisc->enqueue(skb, qdisc); | |
216 | if (err == NET_XMIT_SUCCESS) { | |
217 | qd->q.qlen++; | |
218 | qd->bstats.bytes += skb->len; | |
219 | qd->bstats.packets++; | |
220 | return NET_XMIT_SUCCESS; | |
221 | } | |
f0706e82 JB |
222 | } |
223 | qd->qstats.drops++; | |
224 | return err; | |
225 | } | |
226 | ||
227 | ||
228 | /* TODO: clean up the cases where master_hard_start_xmit | |
229 | * returns non 0 - it shouldn't ever do that. Once done we | |
230 | * can remove this function */ | |
231 | static int wme_qdiscop_requeue(struct sk_buff *skb, struct Qdisc* qd) | |
232 | { | |
233 | struct ieee80211_sched_data *q = qdisc_priv(qd); | |
f0706e82 JB |
234 | struct Qdisc *qdisc; |
235 | int err; | |
236 | ||
237 | /* we recorded which queue to use earlier! */ | |
e2530083 | 238 | qdisc = q->queues[skb_get_queue_mapping(skb)]; |
f0706e82 JB |
239 | |
240 | if ((err = qdisc->ops->requeue(skb, qdisc)) == 0) { | |
241 | qd->q.qlen++; | |
242 | return 0; | |
243 | } | |
244 | qd->qstats.drops++; | |
245 | return err; | |
246 | } | |
247 | ||
248 | ||
249 | static struct sk_buff *wme_qdiscop_dequeue(struct Qdisc* qd) | |
250 | { | |
251 | struct ieee80211_sched_data *q = qdisc_priv(qd); | |
252 | struct net_device *dev = qd->dev; | |
253 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
254 | struct ieee80211_hw *hw = &local->hw; | |
255 | struct sk_buff *skb; | |
256 | struct Qdisc *qdisc; | |
257 | int queue; | |
258 | ||
259 | /* check all the h/w queues in numeric/priority order */ | |
e100bb64 | 260 | for (queue = 0; queue < QD_NUM(hw); queue++) { |
f0706e82 | 261 | /* see if there is room in this hardware queue */ |
e2530083 JB |
262 | if (__netif_subqueue_stopped(local->mdev, queue) || |
263 | !test_bit(queue, q->qdisc_pool)) | |
f0706e82 JB |
264 | continue; |
265 | ||
266 | /* there is space - try and get a frame */ | |
267 | skb = skb_dequeue(&q->requeued[queue]); | |
268 | if (skb) { | |
269 | qd->q.qlen--; | |
270 | return skb; | |
271 | } | |
272 | ||
273 | qdisc = q->queues[queue]; | |
274 | skb = qdisc->dequeue(qdisc); | |
275 | if (skb) { | |
276 | qd->q.qlen--; | |
277 | return skb; | |
278 | } | |
279 | } | |
280 | /* returning a NULL here when all the h/w queues are full means we | |
281 | * never need to call netif_stop_queue in the driver */ | |
282 | return NULL; | |
283 | } | |
284 | ||
285 | ||
286 | static void wme_qdiscop_reset(struct Qdisc* qd) | |
287 | { | |
288 | struct ieee80211_sched_data *q = qdisc_priv(qd); | |
289 | struct ieee80211_local *local = wdev_priv(qd->dev->ieee80211_ptr); | |
290 | struct ieee80211_hw *hw = &local->hw; | |
291 | int queue; | |
292 | ||
293 | /* QUESTION: should we have some hardware flush functionality here? */ | |
294 | ||
e100bb64 | 295 | for (queue = 0; queue < QD_NUM(hw); queue++) { |
f0706e82 JB |
296 | skb_queue_purge(&q->requeued[queue]); |
297 | qdisc_reset(q->queues[queue]); | |
298 | } | |
299 | qd->q.qlen = 0; | |
300 | } | |
301 | ||
302 | ||
303 | static void wme_qdiscop_destroy(struct Qdisc* qd) | |
304 | { | |
305 | struct ieee80211_sched_data *q = qdisc_priv(qd); | |
306 | struct ieee80211_local *local = wdev_priv(qd->dev->ieee80211_ptr); | |
307 | struct ieee80211_hw *hw = &local->hw; | |
308 | int queue; | |
309 | ||
ff31ab56 | 310 | tcf_destroy_chain(&q->filter_list); |
f0706e82 | 311 | |
e100bb64 | 312 | for (queue = 0; queue < QD_NUM(hw); queue++) { |
f0706e82 JB |
313 | skb_queue_purge(&q->requeued[queue]); |
314 | qdisc_destroy(q->queues[queue]); | |
315 | q->queues[queue] = &noop_qdisc; | |
316 | } | |
317 | } | |
318 | ||
319 | ||
320 | /* called whenever parameters are updated on existing qdisc */ | |
1e90474c | 321 | static int wme_qdiscop_tune(struct Qdisc *qd, struct nlattr *opt) |
f0706e82 | 322 | { |
f0706e82 JB |
323 | return 0; |
324 | } | |
325 | ||
326 | ||
327 | /* called during initial creation of qdisc on device */ | |
1e90474c | 328 | static int wme_qdiscop_init(struct Qdisc *qd, struct nlattr *opt) |
f0706e82 JB |
329 | { |
330 | struct ieee80211_sched_data *q = qdisc_priv(qd); | |
331 | struct net_device *dev = qd->dev; | |
332 | struct ieee80211_local *local; | |
e100bb64 | 333 | struct ieee80211_hw *hw; |
f0706e82 JB |
334 | int err = 0, i; |
335 | ||
336 | /* check that device is a mac80211 device */ | |
337 | if (!dev->ieee80211_ptr || | |
338 | dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid) | |
339 | return -EINVAL; | |
340 | ||
e100bb64 JB |
341 | local = wdev_priv(dev->ieee80211_ptr); |
342 | hw = &local->hw; | |
343 | ||
344 | /* only allow on master dev */ | |
345 | if (dev != local->mdev) | |
f0706e82 JB |
346 | return -EINVAL; |
347 | ||
e100bb64 JB |
348 | /* ensure that we are root qdisc */ |
349 | if (qd->parent != TC_H_ROOT) | |
f0706e82 JB |
350 | return -EINVAL; |
351 | ||
352 | if (qd->flags & TCQ_F_INGRESS) | |
353 | return -EINVAL; | |
354 | ||
f0706e82 | 355 | /* if options were passed in, set them */ |
e100bb64 | 356 | if (opt) |
f0706e82 | 357 | err = wme_qdiscop_tune(qd, opt); |
f0706e82 JB |
358 | |
359 | /* create child queues */ | |
e100bb64 | 360 | for (i = 0; i < QD_NUM(hw); i++) { |
f0706e82 JB |
361 | skb_queue_head_init(&q->requeued[i]); |
362 | q->queues[i] = qdisc_create_dflt(qd->dev, &pfifo_qdisc_ops, | |
363 | qd->handle); | |
136e83d6 | 364 | if (!q->queues[i]) { |
f0706e82 | 365 | q->queues[i] = &noop_qdisc; |
a4278e18 PR |
366 | printk(KERN_ERR "%s child qdisc %i creation failed\n", |
367 | dev->name, i); | |
f0706e82 JB |
368 | } |
369 | } | |
370 | ||
e100bb64 JB |
371 | /* non-aggregation queues: reserve/mark as used */ |
372 | for (i = 0; i < local->hw.queues; i++) | |
a9af2013 | 373 | set_bit(i, q->qdisc_pool); |
9e723492 | 374 | |
f0706e82 JB |
375 | return err; |
376 | } | |
377 | ||
378 | static int wme_qdiscop_dump(struct Qdisc *qd, struct sk_buff *skb) | |
379 | { | |
f0706e82 JB |
380 | return -1; |
381 | } | |
382 | ||
383 | ||
384 | static int wme_classop_graft(struct Qdisc *qd, unsigned long arg, | |
385 | struct Qdisc *new, struct Qdisc **old) | |
386 | { | |
387 | struct ieee80211_sched_data *q = qdisc_priv(qd); | |
388 | struct ieee80211_local *local = wdev_priv(qd->dev->ieee80211_ptr); | |
389 | struct ieee80211_hw *hw = &local->hw; | |
390 | unsigned long queue = arg - 1; | |
391 | ||
e100bb64 | 392 | if (queue >= QD_NUM(hw)) |
f0706e82 JB |
393 | return -EINVAL; |
394 | ||
395 | if (!new) | |
396 | new = &noop_qdisc; | |
397 | ||
398 | sch_tree_lock(qd); | |
399 | *old = q->queues[queue]; | |
400 | q->queues[queue] = new; | |
401 | qdisc_reset(*old); | |
402 | sch_tree_unlock(qd); | |
403 | ||
404 | return 0; | |
405 | } | |
406 | ||
407 | ||
408 | static struct Qdisc * | |
409 | wme_classop_leaf(struct Qdisc *qd, unsigned long arg) | |
410 | { | |
411 | struct ieee80211_sched_data *q = qdisc_priv(qd); | |
412 | struct ieee80211_local *local = wdev_priv(qd->dev->ieee80211_ptr); | |
413 | struct ieee80211_hw *hw = &local->hw; | |
414 | unsigned long queue = arg - 1; | |
415 | ||
e100bb64 | 416 | if (queue >= QD_NUM(hw)) |
f0706e82 JB |
417 | return NULL; |
418 | ||
419 | return q->queues[queue]; | |
420 | } | |
421 | ||
422 | ||
423 | static unsigned long wme_classop_get(struct Qdisc *qd, u32 classid) | |
424 | { | |
425 | struct ieee80211_local *local = wdev_priv(qd->dev->ieee80211_ptr); | |
426 | struct ieee80211_hw *hw = &local->hw; | |
427 | unsigned long queue = TC_H_MIN(classid); | |
428 | ||
e100bb64 | 429 | if (queue - 1 >= QD_NUM(hw)) |
f0706e82 JB |
430 | return 0; |
431 | ||
432 | return queue; | |
433 | } | |
434 | ||
435 | ||
436 | static unsigned long wme_classop_bind(struct Qdisc *qd, unsigned long parent, | |
437 | u32 classid) | |
438 | { | |
439 | return wme_classop_get(qd, classid); | |
440 | } | |
441 | ||
442 | ||
443 | static void wme_classop_put(struct Qdisc *q, unsigned long cl) | |
444 | { | |
445 | } | |
446 | ||
447 | ||
448 | static int wme_classop_change(struct Qdisc *qd, u32 handle, u32 parent, | |
1e90474c | 449 | struct nlattr **tca, unsigned long *arg) |
f0706e82 JB |
450 | { |
451 | unsigned long cl = *arg; | |
452 | struct ieee80211_local *local = wdev_priv(qd->dev->ieee80211_ptr); | |
453 | struct ieee80211_hw *hw = &local->hw; | |
454 | ||
e100bb64 | 455 | if (cl - 1 > QD_NUM(hw)) |
f0706e82 JB |
456 | return -ENOENT; |
457 | ||
458 | /* TODO: put code to program hardware queue parameters here, | |
459 | * to allow programming from tc command line */ | |
460 | ||
461 | return 0; | |
462 | } | |
463 | ||
464 | ||
465 | /* we don't support deleting hardware queues | |
466 | * when we add WMM-SA support - TSPECs may be deleted here */ | |
467 | static int wme_classop_delete(struct Qdisc *qd, unsigned long cl) | |
468 | { | |
469 | struct ieee80211_local *local = wdev_priv(qd->dev->ieee80211_ptr); | |
470 | struct ieee80211_hw *hw = &local->hw; | |
471 | ||
e100bb64 | 472 | if (cl - 1 > QD_NUM(hw)) |
f0706e82 JB |
473 | return -ENOENT; |
474 | return 0; | |
475 | } | |
476 | ||
477 | ||
478 | static int wme_classop_dump_class(struct Qdisc *qd, unsigned long cl, | |
479 | struct sk_buff *skb, struct tcmsg *tcm) | |
480 | { | |
481 | struct ieee80211_sched_data *q = qdisc_priv(qd); | |
482 | struct ieee80211_local *local = wdev_priv(qd->dev->ieee80211_ptr); | |
483 | struct ieee80211_hw *hw = &local->hw; | |
484 | ||
e100bb64 | 485 | if (cl - 1 > QD_NUM(hw)) |
f0706e82 JB |
486 | return -ENOENT; |
487 | tcm->tcm_handle = TC_H_MIN(cl); | |
488 | tcm->tcm_parent = qd->handle; | |
489 | tcm->tcm_info = q->queues[cl-1]->handle; /* do we need this? */ | |
490 | return 0; | |
491 | } | |
492 | ||
493 | ||
494 | static void wme_classop_walk(struct Qdisc *qd, struct qdisc_walker *arg) | |
495 | { | |
496 | struct ieee80211_local *local = wdev_priv(qd->dev->ieee80211_ptr); | |
497 | struct ieee80211_hw *hw = &local->hw; | |
498 | int queue; | |
499 | ||
500 | if (arg->stop) | |
501 | return; | |
502 | ||
e100bb64 | 503 | for (queue = 0; queue < QD_NUM(hw); queue++) { |
f0706e82 JB |
504 | if (arg->count < arg->skip) { |
505 | arg->count++; | |
506 | continue; | |
507 | } | |
508 | /* we should return classids for our internal queues here | |
509 | * as well as the external ones */ | |
510 | if (arg->fn(qd, queue+1, arg) < 0) { | |
511 | arg->stop = 1; | |
512 | break; | |
513 | } | |
514 | arg->count++; | |
515 | } | |
516 | } | |
517 | ||
518 | ||
519 | static struct tcf_proto ** wme_classop_find_tcf(struct Qdisc *qd, | |
520 | unsigned long cl) | |
521 | { | |
522 | struct ieee80211_sched_data *q = qdisc_priv(qd); | |
523 | ||
524 | if (cl) | |
525 | return NULL; | |
526 | ||
527 | return &q->filter_list; | |
528 | } | |
529 | ||
530 | ||
531 | /* this qdisc is classful (i.e. has classes, some of which may have leaf qdiscs attached) | |
532 | * - these are the operations on the classes */ | |
20fea08b | 533 | static const struct Qdisc_class_ops class_ops = |
f0706e82 JB |
534 | { |
535 | .graft = wme_classop_graft, | |
536 | .leaf = wme_classop_leaf, | |
537 | ||
538 | .get = wme_classop_get, | |
539 | .put = wme_classop_put, | |
540 | .change = wme_classop_change, | |
541 | .delete = wme_classop_delete, | |
542 | .walk = wme_classop_walk, | |
543 | ||
544 | .tcf_chain = wme_classop_find_tcf, | |
545 | .bind_tcf = wme_classop_bind, | |
546 | .unbind_tcf = wme_classop_put, | |
547 | ||
548 | .dump = wme_classop_dump_class, | |
549 | }; | |
550 | ||
551 | ||
552 | /* queueing discipline operations */ | |
20fea08b | 553 | static struct Qdisc_ops wme_qdisc_ops __read_mostly = |
f0706e82 JB |
554 | { |
555 | .next = NULL, | |
556 | .cl_ops = &class_ops, | |
557 | .id = "ieee80211", | |
558 | .priv_size = sizeof(struct ieee80211_sched_data), | |
559 | ||
560 | .enqueue = wme_qdiscop_enqueue, | |
561 | .dequeue = wme_qdiscop_dequeue, | |
562 | .requeue = wme_qdiscop_requeue, | |
563 | .drop = NULL, /* drop not needed since we are always the root qdisc */ | |
564 | ||
565 | .init = wme_qdiscop_init, | |
566 | .reset = wme_qdiscop_reset, | |
567 | .destroy = wme_qdiscop_destroy, | |
568 | .change = wme_qdiscop_tune, | |
569 | ||
570 | .dump = wme_qdiscop_dump, | |
571 | }; | |
572 | ||
573 | ||
574 | void ieee80211_install_qdisc(struct net_device *dev) | |
575 | { | |
576 | struct Qdisc *qdisc; | |
577 | ||
578 | qdisc = qdisc_create_dflt(dev, &wme_qdisc_ops, TC_H_ROOT); | |
579 | if (!qdisc) { | |
580 | printk(KERN_ERR "%s: qdisc installation failed\n", dev->name); | |
581 | return; | |
582 | } | |
583 | ||
584 | /* same handle as would be allocated by qdisc_alloc_handle() */ | |
585 | qdisc->handle = 0x80010000; | |
586 | ||
587 | qdisc_lock_tree(dev); | |
588 | list_add_tail(&qdisc->list, &dev->qdisc_list); | |
589 | dev->qdisc_sleeping = qdisc; | |
590 | qdisc_unlock_tree(dev); | |
591 | } | |
592 | ||
593 | ||
594 | int ieee80211_qdisc_installed(struct net_device *dev) | |
595 | { | |
596 | return dev->qdisc_sleeping->ops == &wme_qdisc_ops; | |
597 | } | |
598 | ||
599 | ||
600 | int ieee80211_wme_register(void) | |
601 | { | |
602 | return register_qdisc(&wme_qdisc_ops); | |
603 | } | |
604 | ||
605 | ||
606 | void ieee80211_wme_unregister(void) | |
607 | { | |
608 | unregister_qdisc(&wme_qdisc_ops); | |
609 | } | |
9e723492 RR |
610 | |
611 | int ieee80211_ht_agg_queue_add(struct ieee80211_local *local, | |
612 | struct sta_info *sta, u16 tid) | |
613 | { | |
614 | int i; | |
615 | struct ieee80211_sched_data *q = | |
616 | qdisc_priv(local->mdev->qdisc_sleeping); | |
617 | DECLARE_MAC_BUF(mac); | |
618 | ||
619 | /* prepare the filter and save it for the SW queue | |
e100bb64 JB |
620 | * matching the received HW queue */ |
621 | ||
622 | if (!local->hw.ampdu_queues) | |
623 | return -EPERM; | |
9e723492 RR |
624 | |
625 | /* try to get a Qdisc from the pool */ | |
e100bb64 | 626 | for (i = local->hw.queues; i < QD_NUM(&local->hw); i++) |
a9af2013 | 627 | if (!test_and_set_bit(i, q->qdisc_pool)) { |
9e723492 RR |
628 | ieee80211_stop_queue(local_to_hw(local), i); |
629 | sta->tid_to_tx_q[tid] = i; | |
630 | ||
631 | /* IF there are already pending packets | |
632 | * on this tid first we need to drain them | |
633 | * on the previous queue | |
634 | * since HT is strict in order */ | |
635 | #ifdef CONFIG_MAC80211_HT_DEBUG | |
636 | if (net_ratelimit()) | |
637 | printk(KERN_DEBUG "allocated aggregation queue" | |
995ad6c5 | 638 | " %d tid %d addr %s pool=0x%lX\n", |
9e723492 | 639 | i, tid, print_mac(mac, sta->addr), |
a9af2013 | 640 | q->qdisc_pool[0]); |
9e723492 RR |
641 | #endif /* CONFIG_MAC80211_HT_DEBUG */ |
642 | return 0; | |
643 | } | |
644 | ||
645 | return -EAGAIN; | |
646 | } | |
647 | ||
648 | /** | |
649 | * the caller needs to hold local->mdev->queue_lock | |
650 | */ | |
651 | void ieee80211_ht_agg_queue_remove(struct ieee80211_local *local, | |
652 | struct sta_info *sta, u16 tid, | |
653 | u8 requeue) | |
654 | { | |
e100bb64 | 655 | struct ieee80211_hw *hw = &local->hw; |
9e723492 RR |
656 | struct ieee80211_sched_data *q = |
657 | qdisc_priv(local->mdev->qdisc_sleeping); | |
658 | int agg_queue = sta->tid_to_tx_q[tid]; | |
659 | ||
660 | /* return the qdisc to the pool */ | |
a9af2013 | 661 | clear_bit(agg_queue, q->qdisc_pool); |
e100bb64 | 662 | sta->tid_to_tx_q[tid] = QD_NUM(hw); |
9e723492 RR |
663 | |
664 | if (requeue) | |
665 | ieee80211_requeue(local, agg_queue); | |
666 | else | |
667 | q->queues[agg_queue]->ops->reset(q->queues[agg_queue]); | |
668 | } | |
669 | ||
670 | void ieee80211_requeue(struct ieee80211_local *local, int queue) | |
671 | { | |
672 | struct Qdisc *root_qd = local->mdev->qdisc_sleeping; | |
673 | struct ieee80211_sched_data *q = qdisc_priv(root_qd); | |
674 | struct Qdisc *qdisc = q->queues[queue]; | |
675 | struct sk_buff *skb = NULL; | |
0da926f0 | 676 | u32 len; |
9e723492 RR |
677 | |
678 | if (!qdisc || !qdisc->dequeue) | |
679 | return; | |
680 | ||
9e723492 RR |
681 | for (len = qdisc->q.qlen; len > 0; len--) { |
682 | skb = qdisc->dequeue(qdisc); | |
683 | root_qd->q.qlen--; | |
684 | /* packet will be classified again and */ | |
685 | /* skb->packet_data->queue will be overridden if needed */ | |
686 | if (skb) | |
687 | wme_qdiscop_enqueue(skb, root_qd); | |
688 | } | |
689 | } |