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. */ |
9e723492 RR |
22 | #define TC_80211_MAX_QUEUES 16 |
23 | ||
24 | const int ieee802_1d_to_ac[8] = { 2, 3, 3, 2, 1, 1, 0, 0 }; | |
f0706e82 JB |
25 | |
26 | struct ieee80211_sched_data | |
27 | { | |
a9af2013 | 28 | unsigned long qdisc_pool[BITS_TO_LONGS(TC_80211_MAX_QUEUES)]; |
f0706e82 JB |
29 | struct tcf_proto *filter_list; |
30 | struct Qdisc *queues[TC_80211_MAX_QUEUES]; | |
31 | struct sk_buff_head requeued[TC_80211_MAX_QUEUES]; | |
32 | }; | |
33 | ||
a8bdf29c | 34 | static const char llc_ip_hdr[8] = {0xAA, 0xAA, 0x3, 0, 0, 0, 0x08, 0}; |
f0706e82 JB |
35 | |
36 | /* given a data frame determine the 802.1p/1d tag to use */ | |
37 | static inline unsigned classify_1d(struct sk_buff *skb, struct Qdisc *qd) | |
38 | { | |
39 | struct iphdr *ip; | |
40 | int dscp; | |
41 | int offset; | |
42 | ||
43 | struct ieee80211_sched_data *q = qdisc_priv(qd); | |
44 | struct tcf_result res = { -1, 0 }; | |
45 | ||
46 | /* if there is a user set filter list, call out to that */ | |
47 | if (q->filter_list) { | |
48 | tc_classify(skb, q->filter_list, &res); | |
49 | if (res.class != -1) | |
50 | return res.class; | |
51 | } | |
52 | ||
53 | /* skb->priority values from 256->263 are magic values to | |
54 | * directly indicate a specific 802.1d priority. | |
55 | * This is used to allow 802.1d priority to be passed directly in | |
56 | * from VLAN tags, etc. */ | |
57 | if (skb->priority >= 256 && skb->priority <= 263) | |
58 | return skb->priority - 256; | |
59 | ||
60 | /* check there is a valid IP header present */ | |
a8bdf29c GC |
61 | offset = ieee80211_get_hdrlen_from_skb(skb); |
62 | if (skb->len < offset + sizeof(llc_ip_hdr) + sizeof(*ip) || | |
63 | memcmp(skb->data + offset, llc_ip_hdr, sizeof(llc_ip_hdr))) | |
f0706e82 JB |
64 | return 0; |
65 | ||
a8bdf29c | 66 | ip = (struct iphdr *) (skb->data + offset + sizeof(llc_ip_hdr)); |
f0706e82 JB |
67 | |
68 | dscp = ip->tos & 0xfc; | |
69 | if (dscp & 0x1c) | |
70 | return 0; | |
71 | return dscp >> 5; | |
72 | } | |
73 | ||
74 | ||
75 | static inline int wme_downgrade_ac(struct sk_buff *skb) | |
76 | { | |
77 | switch (skb->priority) { | |
78 | case 6: | |
79 | case 7: | |
80 | skb->priority = 5; /* VO -> VI */ | |
81 | return 0; | |
82 | case 4: | |
83 | case 5: | |
84 | skb->priority = 3; /* VI -> BE */ | |
85 | return 0; | |
86 | case 0: | |
87 | case 3: | |
88 | skb->priority = 2; /* BE -> BK */ | |
89 | return 0; | |
90 | default: | |
91 | return -1; | |
92 | } | |
93 | } | |
94 | ||
95 | ||
96 | /* positive return value indicates which queue to use | |
97 | * negative return value indicates to drop the frame */ | |
98 | static inline int classify80211(struct sk_buff *skb, struct Qdisc *qd) | |
99 | { | |
100 | struct ieee80211_local *local = wdev_priv(qd->dev->ieee80211_ptr); | |
f0706e82 JB |
101 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; |
102 | unsigned short fc = le16_to_cpu(hdr->frame_control); | |
103 | int qos; | |
f0706e82 JB |
104 | |
105 | /* see if frame is data or non data frame */ | |
106 | if (unlikely((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA)) { | |
107 | /* management frames go on AC_VO queue, but are sent | |
108 | * without QoS control fields */ | |
109 | return IEEE80211_TX_QUEUE_DATA0; | |
110 | } | |
111 | ||
f9d540ee JB |
112 | if (0 /* injected */) { |
113 | /* use AC from radiotap */ | |
f0706e82 JB |
114 | } |
115 | ||
116 | /* is this a QoS frame? */ | |
117 | qos = fc & IEEE80211_STYPE_QOS_DATA; | |
118 | ||
119 | if (!qos) { | |
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); | |
144 | struct ieee80211_sched_data *q = qdisc_priv(qd); | |
145 | struct ieee80211_tx_packet_data *pkt_data = | |
146 | (struct ieee80211_tx_packet_data *) skb->cb; | |
147 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; | |
148 | unsigned short fc = le16_to_cpu(hdr->frame_control); | |
149 | struct Qdisc *qdisc; | |
150 | int err, queue; | |
9e723492 RR |
151 | struct sta_info *sta; |
152 | u8 tid; | |
f0706e82 | 153 | |
e8bf9649 | 154 | if (pkt_data->flags & IEEE80211_TXPD_REQUEUE) { |
9e723492 | 155 | queue = pkt_data->queue; |
d0709a65 | 156 | rcu_read_lock(); |
9e723492 RR |
157 | sta = sta_info_get(local, hdr->addr1); |
158 | tid = skb->priority & QOS_CONTROL_TAG1D_MASK; | |
159 | if (sta) { | |
160 | int ampdu_queue = sta->tid_to_tx_q[tid]; | |
161 | if ((ampdu_queue < local->hw.queues) && | |
a9af2013 | 162 | test_bit(ampdu_queue, q->qdisc_pool)) { |
9e723492 RR |
163 | queue = ampdu_queue; |
164 | pkt_data->flags |= IEEE80211_TXPD_AMPDU; | |
165 | } else { | |
166 | pkt_data->flags &= ~IEEE80211_TXPD_AMPDU; | |
167 | } | |
9e723492 | 168 | } |
d0709a65 | 169 | rcu_read_unlock(); |
9e723492 | 170 | skb_queue_tail(&q->requeued[queue], skb); |
f0706e82 JB |
171 | qd->q.qlen++; |
172 | return 0; | |
173 | } | |
174 | ||
175 | queue = classify80211(skb, qd); | |
176 | ||
177 | /* now we know the 1d priority, fill in the QoS header if there is one | |
178 | */ | |
179 | if (WLAN_FC_IS_QOS_DATA(fc)) { | |
180 | u8 *p = skb->data + ieee80211_get_hdrlen(fc) - 2; | |
9e723492 RR |
181 | u8 ack_policy = 0; |
182 | tid = skb->priority & QOS_CONTROL_TAG1D_MASK; | |
f0706e82 | 183 | if (local->wifi_wme_noack_test) |
9e723492 | 184 | ack_policy |= QOS_CONTROL_ACK_POLICY_NOACK << |
f0706e82 JB |
185 | QOS_CONTROL_ACK_POLICY_SHIFT; |
186 | /* qos header is 2 bytes, second reserved */ | |
9e723492 | 187 | *p = ack_policy | tid; |
f0706e82 JB |
188 | p++; |
189 | *p = 0; | |
9e723492 | 190 | |
d0709a65 JB |
191 | rcu_read_lock(); |
192 | ||
9e723492 RR |
193 | sta = sta_info_get(local, hdr->addr1); |
194 | if (sta) { | |
195 | int ampdu_queue = sta->tid_to_tx_q[tid]; | |
196 | if ((ampdu_queue < local->hw.queues) && | |
a9af2013 | 197 | test_bit(ampdu_queue, q->qdisc_pool)) { |
9e723492 RR |
198 | queue = ampdu_queue; |
199 | pkt_data->flags |= IEEE80211_TXPD_AMPDU; | |
200 | } else { | |
201 | pkt_data->flags &= ~IEEE80211_TXPD_AMPDU; | |
202 | } | |
9e723492 | 203 | } |
d0709a65 JB |
204 | |
205 | rcu_read_unlock(); | |
f0706e82 JB |
206 | } |
207 | ||
208 | if (unlikely(queue >= local->hw.queues)) { | |
209 | #if 0 | |
210 | if (net_ratelimit()) { | |
211 | printk(KERN_DEBUG "%s - queue=%d (hw does not " | |
212 | "support) -> %d\n", | |
213 | __func__, queue, local->hw.queues - 1); | |
214 | } | |
215 | #endif | |
216 | queue = local->hw.queues - 1; | |
217 | } | |
218 | ||
219 | if (unlikely(queue < 0)) { | |
220 | kfree_skb(skb); | |
221 | err = NET_XMIT_DROP; | |
222 | } else { | |
9e723492 | 223 | tid = skb->priority & QOS_CONTROL_TAG1D_MASK; |
f0706e82 JB |
224 | pkt_data->queue = (unsigned int) queue; |
225 | qdisc = q->queues[queue]; | |
226 | err = qdisc->enqueue(skb, qdisc); | |
227 | if (err == NET_XMIT_SUCCESS) { | |
228 | qd->q.qlen++; | |
229 | qd->bstats.bytes += skb->len; | |
230 | qd->bstats.packets++; | |
231 | return NET_XMIT_SUCCESS; | |
232 | } | |
233 | } | |
234 | qd->qstats.drops++; | |
235 | return err; | |
236 | } | |
237 | ||
238 | ||
239 | /* TODO: clean up the cases where master_hard_start_xmit | |
240 | * returns non 0 - it shouldn't ever do that. Once done we | |
241 | * can remove this function */ | |
242 | static int wme_qdiscop_requeue(struct sk_buff *skb, struct Qdisc* qd) | |
243 | { | |
244 | struct ieee80211_sched_data *q = qdisc_priv(qd); | |
245 | struct ieee80211_tx_packet_data *pkt_data = | |
246 | (struct ieee80211_tx_packet_data *) skb->cb; | |
247 | struct Qdisc *qdisc; | |
248 | int err; | |
249 | ||
250 | /* we recorded which queue to use earlier! */ | |
251 | qdisc = q->queues[pkt_data->queue]; | |
252 | ||
253 | if ((err = qdisc->ops->requeue(skb, qdisc)) == 0) { | |
254 | qd->q.qlen++; | |
255 | return 0; | |
256 | } | |
257 | qd->qstats.drops++; | |
258 | return err; | |
259 | } | |
260 | ||
261 | ||
262 | static struct sk_buff *wme_qdiscop_dequeue(struct Qdisc* qd) | |
263 | { | |
264 | struct ieee80211_sched_data *q = qdisc_priv(qd); | |
265 | struct net_device *dev = qd->dev; | |
266 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
267 | struct ieee80211_hw *hw = &local->hw; | |
268 | struct sk_buff *skb; | |
269 | struct Qdisc *qdisc; | |
270 | int queue; | |
271 | ||
272 | /* check all the h/w queues in numeric/priority order */ | |
273 | for (queue = 0; queue < hw->queues; queue++) { | |
274 | /* see if there is room in this hardware queue */ | |
9e723492 RR |
275 | if ((test_bit(IEEE80211_LINK_STATE_XOFF, |
276 | &local->state[queue])) || | |
277 | (test_bit(IEEE80211_LINK_STATE_PENDING, | |
278 | &local->state[queue])) || | |
a9af2013 | 279 | (!test_bit(queue, q->qdisc_pool))) |
f0706e82 JB |
280 | continue; |
281 | ||
282 | /* there is space - try and get a frame */ | |
283 | skb = skb_dequeue(&q->requeued[queue]); | |
284 | if (skb) { | |
285 | qd->q.qlen--; | |
286 | return skb; | |
287 | } | |
288 | ||
289 | qdisc = q->queues[queue]; | |
290 | skb = qdisc->dequeue(qdisc); | |
291 | if (skb) { | |
292 | qd->q.qlen--; | |
293 | return skb; | |
294 | } | |
295 | } | |
296 | /* returning a NULL here when all the h/w queues are full means we | |
297 | * never need to call netif_stop_queue in the driver */ | |
298 | return NULL; | |
299 | } | |
300 | ||
301 | ||
302 | static void wme_qdiscop_reset(struct Qdisc* qd) | |
303 | { | |
304 | struct ieee80211_sched_data *q = qdisc_priv(qd); | |
305 | struct ieee80211_local *local = wdev_priv(qd->dev->ieee80211_ptr); | |
306 | struct ieee80211_hw *hw = &local->hw; | |
307 | int queue; | |
308 | ||
309 | /* QUESTION: should we have some hardware flush functionality here? */ | |
310 | ||
311 | for (queue = 0; queue < hw->queues; queue++) { | |
312 | skb_queue_purge(&q->requeued[queue]); | |
313 | qdisc_reset(q->queues[queue]); | |
314 | } | |
315 | qd->q.qlen = 0; | |
316 | } | |
317 | ||
318 | ||
319 | static void wme_qdiscop_destroy(struct Qdisc* qd) | |
320 | { | |
321 | struct ieee80211_sched_data *q = qdisc_priv(qd); | |
322 | struct ieee80211_local *local = wdev_priv(qd->dev->ieee80211_ptr); | |
323 | struct ieee80211_hw *hw = &local->hw; | |
324 | int queue; | |
325 | ||
326 | tcf_destroy_chain(q->filter_list); | |
327 | q->filter_list = NULL; | |
328 | ||
329 | for (queue=0; queue < hw->queues; queue++) { | |
330 | skb_queue_purge(&q->requeued[queue]); | |
331 | qdisc_destroy(q->queues[queue]); | |
332 | q->queues[queue] = &noop_qdisc; | |
333 | } | |
334 | } | |
335 | ||
336 | ||
337 | /* called whenever parameters are updated on existing qdisc */ | |
1e90474c | 338 | static int wme_qdiscop_tune(struct Qdisc *qd, struct nlattr *opt) |
f0706e82 JB |
339 | { |
340 | /* struct ieee80211_sched_data *q = qdisc_priv(qd); | |
341 | */ | |
342 | /* check our options block is the right size */ | |
343 | /* copy any options to our local structure */ | |
344 | /* Ignore options block for now - always use static mapping | |
1e90474c | 345 | struct tc_ieee80211_qopt *qopt = nla_data(opt); |
f0706e82 | 346 | |
1e90474c | 347 | if (opt->nla_len < nla_attr_size(sizeof(*qopt))) |
f0706e82 JB |
348 | return -EINVAL; |
349 | memcpy(q->tag2queue, qopt->tag2queue, sizeof(qopt->tag2queue)); | |
350 | */ | |
351 | return 0; | |
352 | } | |
353 | ||
354 | ||
355 | /* called during initial creation of qdisc on device */ | |
1e90474c | 356 | static int wme_qdiscop_init(struct Qdisc *qd, struct nlattr *opt) |
f0706e82 JB |
357 | { |
358 | struct ieee80211_sched_data *q = qdisc_priv(qd); | |
359 | struct net_device *dev = qd->dev; | |
360 | struct ieee80211_local *local; | |
361 | int queues; | |
362 | int err = 0, i; | |
363 | ||
364 | /* check that device is a mac80211 device */ | |
365 | if (!dev->ieee80211_ptr || | |
366 | dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid) | |
367 | return -EINVAL; | |
368 | ||
369 | /* check this device is an ieee80211 master type device */ | |
370 | if (dev->type != ARPHRD_IEEE80211) | |
371 | return -EINVAL; | |
372 | ||
373 | /* check that there is no qdisc currently attached to device | |
374 | * this ensures that we will be the root qdisc. (I can't find a better | |
375 | * way to test this explicitly) */ | |
376 | if (dev->qdisc_sleeping != &noop_qdisc) | |
377 | return -EINVAL; | |
378 | ||
379 | if (qd->flags & TCQ_F_INGRESS) | |
380 | return -EINVAL; | |
381 | ||
382 | local = wdev_priv(dev->ieee80211_ptr); | |
383 | queues = local->hw.queues; | |
384 | ||
385 | /* if options were passed in, set them */ | |
386 | if (opt) { | |
387 | err = wme_qdiscop_tune(qd, opt); | |
388 | } | |
389 | ||
390 | /* create child queues */ | |
391 | for (i = 0; i < queues; i++) { | |
392 | skb_queue_head_init(&q->requeued[i]); | |
393 | q->queues[i] = qdisc_create_dflt(qd->dev, &pfifo_qdisc_ops, | |
394 | qd->handle); | |
136e83d6 | 395 | if (!q->queues[i]) { |
f0706e82 JB |
396 | q->queues[i] = &noop_qdisc; |
397 | printk(KERN_ERR "%s child qdisc %i creation failed", dev->name, i); | |
398 | } | |
399 | } | |
400 | ||
9e723492 RR |
401 | /* reserve all legacy QoS queues */ |
402 | for (i = 0; i < min(IEEE80211_TX_QUEUE_DATA4, queues); i++) | |
a9af2013 | 403 | set_bit(i, q->qdisc_pool); |
9e723492 | 404 | |
f0706e82 JB |
405 | return err; |
406 | } | |
407 | ||
408 | static int wme_qdiscop_dump(struct Qdisc *qd, struct sk_buff *skb) | |
409 | { | |
410 | /* struct ieee80211_sched_data *q = qdisc_priv(qd); | |
411 | unsigned char *p = skb->tail; | |
412 | struct tc_ieee80211_qopt opt; | |
413 | ||
414 | memcpy(&opt.tag2queue, q->tag2queue, TC_80211_MAX_TAG + 1); | |
1e90474c | 415 | NLA_PUT(skb, TCA_OPTIONS, sizeof(opt), &opt); |
f0706e82 JB |
416 | */ return skb->len; |
417 | /* | |
1e90474c | 418 | nla_put_failure: |
f0706e82 JB |
419 | skb_trim(skb, p - skb->data);*/ |
420 | return -1; | |
421 | } | |
422 | ||
423 | ||
424 | static int wme_classop_graft(struct Qdisc *qd, unsigned long arg, | |
425 | struct Qdisc *new, struct Qdisc **old) | |
426 | { | |
427 | struct ieee80211_sched_data *q = qdisc_priv(qd); | |
428 | struct ieee80211_local *local = wdev_priv(qd->dev->ieee80211_ptr); | |
429 | struct ieee80211_hw *hw = &local->hw; | |
430 | unsigned long queue = arg - 1; | |
431 | ||
432 | if (queue >= hw->queues) | |
433 | return -EINVAL; | |
434 | ||
435 | if (!new) | |
436 | new = &noop_qdisc; | |
437 | ||
438 | sch_tree_lock(qd); | |
439 | *old = q->queues[queue]; | |
440 | q->queues[queue] = new; | |
441 | qdisc_reset(*old); | |
442 | sch_tree_unlock(qd); | |
443 | ||
444 | return 0; | |
445 | } | |
446 | ||
447 | ||
448 | static struct Qdisc * | |
449 | wme_classop_leaf(struct Qdisc *qd, unsigned long arg) | |
450 | { | |
451 | struct ieee80211_sched_data *q = qdisc_priv(qd); | |
452 | struct ieee80211_local *local = wdev_priv(qd->dev->ieee80211_ptr); | |
453 | struct ieee80211_hw *hw = &local->hw; | |
454 | unsigned long queue = arg - 1; | |
455 | ||
456 | if (queue >= hw->queues) | |
457 | return NULL; | |
458 | ||
459 | return q->queues[queue]; | |
460 | } | |
461 | ||
462 | ||
463 | static unsigned long wme_classop_get(struct Qdisc *qd, u32 classid) | |
464 | { | |
465 | struct ieee80211_local *local = wdev_priv(qd->dev->ieee80211_ptr); | |
466 | struct ieee80211_hw *hw = &local->hw; | |
467 | unsigned long queue = TC_H_MIN(classid); | |
468 | ||
469 | if (queue - 1 >= hw->queues) | |
470 | return 0; | |
471 | ||
472 | return queue; | |
473 | } | |
474 | ||
475 | ||
476 | static unsigned long wme_classop_bind(struct Qdisc *qd, unsigned long parent, | |
477 | u32 classid) | |
478 | { | |
479 | return wme_classop_get(qd, classid); | |
480 | } | |
481 | ||
482 | ||
483 | static void wme_classop_put(struct Qdisc *q, unsigned long cl) | |
484 | { | |
485 | } | |
486 | ||
487 | ||
488 | static int wme_classop_change(struct Qdisc *qd, u32 handle, u32 parent, | |
1e90474c | 489 | struct nlattr **tca, unsigned long *arg) |
f0706e82 JB |
490 | { |
491 | unsigned long cl = *arg; | |
492 | struct ieee80211_local *local = wdev_priv(qd->dev->ieee80211_ptr); | |
493 | struct ieee80211_hw *hw = &local->hw; | |
494 | ||
495 | if (cl - 1 > hw->queues) | |
496 | return -ENOENT; | |
497 | ||
498 | /* TODO: put code to program hardware queue parameters here, | |
499 | * to allow programming from tc command line */ | |
500 | ||
501 | return 0; | |
502 | } | |
503 | ||
504 | ||
505 | /* we don't support deleting hardware queues | |
506 | * when we add WMM-SA support - TSPECs may be deleted here */ | |
507 | static int wme_classop_delete(struct Qdisc *qd, unsigned long cl) | |
508 | { | |
509 | struct ieee80211_local *local = wdev_priv(qd->dev->ieee80211_ptr); | |
510 | struct ieee80211_hw *hw = &local->hw; | |
511 | ||
512 | if (cl - 1 > hw->queues) | |
513 | return -ENOENT; | |
514 | return 0; | |
515 | } | |
516 | ||
517 | ||
518 | static int wme_classop_dump_class(struct Qdisc *qd, unsigned long cl, | |
519 | struct sk_buff *skb, struct tcmsg *tcm) | |
520 | { | |
521 | struct ieee80211_sched_data *q = qdisc_priv(qd); | |
522 | struct ieee80211_local *local = wdev_priv(qd->dev->ieee80211_ptr); | |
523 | struct ieee80211_hw *hw = &local->hw; | |
524 | ||
525 | if (cl - 1 > hw->queues) | |
526 | return -ENOENT; | |
527 | tcm->tcm_handle = TC_H_MIN(cl); | |
528 | tcm->tcm_parent = qd->handle; | |
529 | tcm->tcm_info = q->queues[cl-1]->handle; /* do we need this? */ | |
530 | return 0; | |
531 | } | |
532 | ||
533 | ||
534 | static void wme_classop_walk(struct Qdisc *qd, struct qdisc_walker *arg) | |
535 | { | |
536 | struct ieee80211_local *local = wdev_priv(qd->dev->ieee80211_ptr); | |
537 | struct ieee80211_hw *hw = &local->hw; | |
538 | int queue; | |
539 | ||
540 | if (arg->stop) | |
541 | return; | |
542 | ||
543 | for (queue = 0; queue < hw->queues; queue++) { | |
544 | if (arg->count < arg->skip) { | |
545 | arg->count++; | |
546 | continue; | |
547 | } | |
548 | /* we should return classids for our internal queues here | |
549 | * as well as the external ones */ | |
550 | if (arg->fn(qd, queue+1, arg) < 0) { | |
551 | arg->stop = 1; | |
552 | break; | |
553 | } | |
554 | arg->count++; | |
555 | } | |
556 | } | |
557 | ||
558 | ||
559 | static struct tcf_proto ** wme_classop_find_tcf(struct Qdisc *qd, | |
560 | unsigned long cl) | |
561 | { | |
562 | struct ieee80211_sched_data *q = qdisc_priv(qd); | |
563 | ||
564 | if (cl) | |
565 | return NULL; | |
566 | ||
567 | return &q->filter_list; | |
568 | } | |
569 | ||
570 | ||
571 | /* this qdisc is classful (i.e. has classes, some of which may have leaf qdiscs attached) | |
572 | * - these are the operations on the classes */ | |
20fea08b | 573 | static const struct Qdisc_class_ops class_ops = |
f0706e82 JB |
574 | { |
575 | .graft = wme_classop_graft, | |
576 | .leaf = wme_classop_leaf, | |
577 | ||
578 | .get = wme_classop_get, | |
579 | .put = wme_classop_put, | |
580 | .change = wme_classop_change, | |
581 | .delete = wme_classop_delete, | |
582 | .walk = wme_classop_walk, | |
583 | ||
584 | .tcf_chain = wme_classop_find_tcf, | |
585 | .bind_tcf = wme_classop_bind, | |
586 | .unbind_tcf = wme_classop_put, | |
587 | ||
588 | .dump = wme_classop_dump_class, | |
589 | }; | |
590 | ||
591 | ||
592 | /* queueing discipline operations */ | |
20fea08b | 593 | static struct Qdisc_ops wme_qdisc_ops __read_mostly = |
f0706e82 JB |
594 | { |
595 | .next = NULL, | |
596 | .cl_ops = &class_ops, | |
597 | .id = "ieee80211", | |
598 | .priv_size = sizeof(struct ieee80211_sched_data), | |
599 | ||
600 | .enqueue = wme_qdiscop_enqueue, | |
601 | .dequeue = wme_qdiscop_dequeue, | |
602 | .requeue = wme_qdiscop_requeue, | |
603 | .drop = NULL, /* drop not needed since we are always the root qdisc */ | |
604 | ||
605 | .init = wme_qdiscop_init, | |
606 | .reset = wme_qdiscop_reset, | |
607 | .destroy = wme_qdiscop_destroy, | |
608 | .change = wme_qdiscop_tune, | |
609 | ||
610 | .dump = wme_qdiscop_dump, | |
611 | }; | |
612 | ||
613 | ||
614 | void ieee80211_install_qdisc(struct net_device *dev) | |
615 | { | |
616 | struct Qdisc *qdisc; | |
617 | ||
618 | qdisc = qdisc_create_dflt(dev, &wme_qdisc_ops, TC_H_ROOT); | |
619 | if (!qdisc) { | |
620 | printk(KERN_ERR "%s: qdisc installation failed\n", dev->name); | |
621 | return; | |
622 | } | |
623 | ||
624 | /* same handle as would be allocated by qdisc_alloc_handle() */ | |
625 | qdisc->handle = 0x80010000; | |
626 | ||
627 | qdisc_lock_tree(dev); | |
628 | list_add_tail(&qdisc->list, &dev->qdisc_list); | |
629 | dev->qdisc_sleeping = qdisc; | |
630 | qdisc_unlock_tree(dev); | |
631 | } | |
632 | ||
633 | ||
634 | int ieee80211_qdisc_installed(struct net_device *dev) | |
635 | { | |
636 | return dev->qdisc_sleeping->ops == &wme_qdisc_ops; | |
637 | } | |
638 | ||
639 | ||
640 | int ieee80211_wme_register(void) | |
641 | { | |
642 | return register_qdisc(&wme_qdisc_ops); | |
643 | } | |
644 | ||
645 | ||
646 | void ieee80211_wme_unregister(void) | |
647 | { | |
648 | unregister_qdisc(&wme_qdisc_ops); | |
649 | } | |
9e723492 RR |
650 | |
651 | int ieee80211_ht_agg_queue_add(struct ieee80211_local *local, | |
652 | struct sta_info *sta, u16 tid) | |
653 | { | |
654 | int i; | |
655 | struct ieee80211_sched_data *q = | |
656 | qdisc_priv(local->mdev->qdisc_sleeping); | |
657 | DECLARE_MAC_BUF(mac); | |
658 | ||
659 | /* prepare the filter and save it for the SW queue | |
660 | * matching the recieved HW queue */ | |
661 | ||
662 | /* try to get a Qdisc from the pool */ | |
663 | for (i = IEEE80211_TX_QUEUE_BEACON; i < local->hw.queues; i++) | |
a9af2013 | 664 | if (!test_and_set_bit(i, q->qdisc_pool)) { |
9e723492 RR |
665 | ieee80211_stop_queue(local_to_hw(local), i); |
666 | sta->tid_to_tx_q[tid] = i; | |
667 | ||
668 | /* IF there are already pending packets | |
669 | * on this tid first we need to drain them | |
670 | * on the previous queue | |
671 | * since HT is strict in order */ | |
672 | #ifdef CONFIG_MAC80211_HT_DEBUG | |
673 | if (net_ratelimit()) | |
674 | printk(KERN_DEBUG "allocated aggregation queue" | |
a9af2013 | 675 | " %d tid %d addr %s pool=0x%lX", |
9e723492 | 676 | i, tid, print_mac(mac, sta->addr), |
a9af2013 | 677 | q->qdisc_pool[0]); |
9e723492 RR |
678 | #endif /* CONFIG_MAC80211_HT_DEBUG */ |
679 | return 0; | |
680 | } | |
681 | ||
682 | return -EAGAIN; | |
683 | } | |
684 | ||
685 | /** | |
686 | * the caller needs to hold local->mdev->queue_lock | |
687 | */ | |
688 | void ieee80211_ht_agg_queue_remove(struct ieee80211_local *local, | |
689 | struct sta_info *sta, u16 tid, | |
690 | u8 requeue) | |
691 | { | |
692 | struct ieee80211_sched_data *q = | |
693 | qdisc_priv(local->mdev->qdisc_sleeping); | |
694 | int agg_queue = sta->tid_to_tx_q[tid]; | |
695 | ||
696 | /* return the qdisc to the pool */ | |
a9af2013 | 697 | clear_bit(agg_queue, q->qdisc_pool); |
9e723492 RR |
698 | sta->tid_to_tx_q[tid] = local->hw.queues; |
699 | ||
700 | if (requeue) | |
701 | ieee80211_requeue(local, agg_queue); | |
702 | else | |
703 | q->queues[agg_queue]->ops->reset(q->queues[agg_queue]); | |
704 | } | |
705 | ||
706 | void ieee80211_requeue(struct ieee80211_local *local, int queue) | |
707 | { | |
708 | struct Qdisc *root_qd = local->mdev->qdisc_sleeping; | |
709 | struct ieee80211_sched_data *q = qdisc_priv(root_qd); | |
710 | struct Qdisc *qdisc = q->queues[queue]; | |
711 | struct sk_buff *skb = NULL; | |
712 | u32 len = qdisc->q.qlen; | |
713 | ||
714 | if (!qdisc || !qdisc->dequeue) | |
715 | return; | |
716 | ||
717 | printk(KERN_DEBUG "requeue: qlen = %d\n", qdisc->q.qlen); | |
718 | for (len = qdisc->q.qlen; len > 0; len--) { | |
719 | skb = qdisc->dequeue(qdisc); | |
720 | root_qd->q.qlen--; | |
721 | /* packet will be classified again and */ | |
722 | /* skb->packet_data->queue will be overridden if needed */ | |
723 | if (skb) | |
724 | wme_qdiscop_enqueue(skb, root_qd); | |
725 | } | |
726 | } |