Commit | Line | Data |
---|---|---|
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 JB |
107 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; |
108 | unsigned short fc = le16_to_cpu(hdr->frame_control); | |
109 | int qos; | |
f0706e82 JB |
110 | |
111 | /* see if frame is data or non data frame */ | |
112 | if (unlikely((fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA)) { | |
113 | /* management frames go on AC_VO queue, but are sent | |
114 | * without QoS control fields */ | |
e100bb64 | 115 | return 0; |
f0706e82 JB |
116 | } |
117 | ||
f9d540ee JB |
118 | if (0 /* injected */) { |
119 | /* use AC from radiotap */ | |
f0706e82 JB |
120 | } |
121 | ||
122 | /* is this a QoS frame? */ | |
123 | qos = fc & IEEE80211_STYPE_QOS_DATA; | |
124 | ||
125 | if (!qos) { | |
126 | skb->priority = 0; /* required for correct WPA/11i MIC */ | |
127 | return ieee802_1d_to_ac[skb->priority]; | |
128 | } | |
129 | ||
130 | /* use the data classifier to determine what 802.1d tag the | |
3c3b00ca | 131 | * data frame has */ |
f0706e82 JB |
132 | skb->priority = classify_1d(skb, qd); |
133 | ||
3c3b00ca | 134 | /* in case we are a client verify acm is not set for this ac */ |
f0706e82 JB |
135 | while (unlikely(local->wmm_acm & BIT(skb->priority))) { |
136 | if (wme_downgrade_ac(skb)) { | |
3c3b00ca | 137 | /* No AC with lower priority has acm=0, drop packet. */ |
f0706e82 JB |
138 | return -1; |
139 | } | |
140 | } | |
141 | ||
142 | /* look up which queue to use for frames with this 1d tag */ | |
143 | return ieee802_1d_to_ac[skb->priority]; | |
144 | } | |
145 | ||
146 | ||
147 | static int wme_qdiscop_enqueue(struct sk_buff *skb, struct Qdisc* qd) | |
148 | { | |
149 | struct ieee80211_local *local = wdev_priv(qd->dev->ieee80211_ptr); | |
e100bb64 | 150 | struct ieee80211_hw *hw = &local->hw; |
f0706e82 JB |
151 | struct ieee80211_sched_data *q = qdisc_priv(qd); |
152 | struct ieee80211_tx_packet_data *pkt_data = | |
153 | (struct ieee80211_tx_packet_data *) skb->cb; | |
154 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *) skb->data; | |
155 | unsigned short fc = le16_to_cpu(hdr->frame_control); | |
156 | struct Qdisc *qdisc; | |
9e723492 | 157 | struct sta_info *sta; |
5c5e1289 | 158 | int err, queue; |
9e723492 | 159 | u8 tid; |
f0706e82 | 160 | |
e8bf9649 | 161 | if (pkt_data->flags & IEEE80211_TXPD_REQUEUE) { |
9e723492 | 162 | queue = pkt_data->queue; |
d0709a65 | 163 | rcu_read_lock(); |
9e723492 RR |
164 | sta = sta_info_get(local, hdr->addr1); |
165 | tid = skb->priority & QOS_CONTROL_TAG1D_MASK; | |
166 | if (sta) { | |
167 | int ampdu_queue = sta->tid_to_tx_q[tid]; | |
e100bb64 | 168 | if ((ampdu_queue < QD_NUM(hw)) && |
a9af2013 | 169 | test_bit(ampdu_queue, q->qdisc_pool)) { |
9e723492 RR |
170 | queue = ampdu_queue; |
171 | pkt_data->flags |= IEEE80211_TXPD_AMPDU; | |
172 | } else { | |
173 | pkt_data->flags &= ~IEEE80211_TXPD_AMPDU; | |
174 | } | |
9e723492 | 175 | } |
d0709a65 | 176 | rcu_read_unlock(); |
9e723492 | 177 | skb_queue_tail(&q->requeued[queue], skb); |
f0706e82 JB |
178 | qd->q.qlen++; |
179 | return 0; | |
180 | } | |
181 | ||
182 | queue = classify80211(skb, qd); | |
183 | ||
e100bb64 JB |
184 | if (unlikely(queue >= local->hw.queues)) |
185 | queue = local->hw.queues - 1; | |
186 | ||
f0706e82 JB |
187 | /* now we know the 1d priority, fill in the QoS header if there is one |
188 | */ | |
189 | if (WLAN_FC_IS_QOS_DATA(fc)) { | |
190 | u8 *p = skb->data + ieee80211_get_hdrlen(fc) - 2; | |
9e723492 RR |
191 | u8 ack_policy = 0; |
192 | tid = skb->priority & QOS_CONTROL_TAG1D_MASK; | |
f0706e82 | 193 | if (local->wifi_wme_noack_test) |
9e723492 | 194 | ack_policy |= QOS_CONTROL_ACK_POLICY_NOACK << |
f0706e82 JB |
195 | QOS_CONTROL_ACK_POLICY_SHIFT; |
196 | /* qos header is 2 bytes, second reserved */ | |
9e723492 | 197 | *p = ack_policy | tid; |
f0706e82 JB |
198 | p++; |
199 | *p = 0; | |
9e723492 | 200 | |
d0709a65 JB |
201 | rcu_read_lock(); |
202 | ||
9e723492 RR |
203 | sta = sta_info_get(local, hdr->addr1); |
204 | if (sta) { | |
205 | int ampdu_queue = sta->tid_to_tx_q[tid]; | |
e100bb64 JB |
206 | if ((ampdu_queue < QD_NUM(hw)) && |
207 | test_bit(ampdu_queue, q->qdisc_pool)) { | |
9e723492 RR |
208 | queue = ampdu_queue; |
209 | pkt_data->flags |= IEEE80211_TXPD_AMPDU; | |
210 | } else { | |
211 | pkt_data->flags &= ~IEEE80211_TXPD_AMPDU; | |
212 | } | |
9e723492 | 213 | } |
d0709a65 JB |
214 | |
215 | rcu_read_unlock(); | |
f0706e82 JB |
216 | } |
217 | ||
5c5e1289 JB |
218 | if (unlikely(queue < 0)) { |
219 | kfree_skb(skb); | |
220 | err = NET_XMIT_DROP; | |
221 | } else { | |
222 | tid = skb->priority & QOS_CONTROL_TAG1D_MASK; | |
223 | pkt_data->queue = (unsigned int) queue; | |
224 | qdisc = q->queues[queue]; | |
225 | err = qdisc->enqueue(skb, qdisc); | |
226 | if (err == NET_XMIT_SUCCESS) { | |
227 | qd->q.qlen++; | |
228 | qd->bstats.bytes += skb->len; | |
229 | qd->bstats.packets++; | |
230 | return NET_XMIT_SUCCESS; | |
231 | } | |
f0706e82 JB |
232 | } |
233 | qd->qstats.drops++; | |
234 | return err; | |
235 | } | |
236 | ||
237 | ||
238 | /* TODO: clean up the cases where master_hard_start_xmit | |
239 | * returns non 0 - it shouldn't ever do that. Once done we | |
240 | * can remove this function */ | |
241 | static int wme_qdiscop_requeue(struct sk_buff *skb, struct Qdisc* qd) | |
242 | { | |
243 | struct ieee80211_sched_data *q = qdisc_priv(qd); | |
244 | struct ieee80211_tx_packet_data *pkt_data = | |
245 | (struct ieee80211_tx_packet_data *) skb->cb; | |
246 | struct Qdisc *qdisc; | |
247 | int err; | |
248 | ||
249 | /* we recorded which queue to use earlier! */ | |
250 | qdisc = q->queues[pkt_data->queue]; | |
251 | ||
252 | if ((err = qdisc->ops->requeue(skb, qdisc)) == 0) { | |
253 | qd->q.qlen++; | |
254 | return 0; | |
255 | } | |
256 | qd->qstats.drops++; | |
257 | return err; | |
258 | } | |
259 | ||
260 | ||
261 | static struct sk_buff *wme_qdiscop_dequeue(struct Qdisc* qd) | |
262 | { | |
263 | struct ieee80211_sched_data *q = qdisc_priv(qd); | |
264 | struct net_device *dev = qd->dev; | |
265 | struct ieee80211_local *local = wdev_priv(dev->ieee80211_ptr); | |
266 | struct ieee80211_hw *hw = &local->hw; | |
267 | struct sk_buff *skb; | |
268 | struct Qdisc *qdisc; | |
269 | int queue; | |
270 | ||
271 | /* check all the h/w queues in numeric/priority order */ | |
e100bb64 | 272 | for (queue = 0; queue < QD_NUM(hw); queue++) { |
f0706e82 | 273 | /* see if there is room in this hardware queue */ |
9e723492 RR |
274 | if ((test_bit(IEEE80211_LINK_STATE_XOFF, |
275 | &local->state[queue])) || | |
276 | (test_bit(IEEE80211_LINK_STATE_PENDING, | |
277 | &local->state[queue])) || | |
a9af2013 | 278 | (!test_bit(queue, q->qdisc_pool))) |
f0706e82 JB |
279 | continue; |
280 | ||
281 | /* there is space - try and get a frame */ | |
282 | skb = skb_dequeue(&q->requeued[queue]); | |
283 | if (skb) { | |
284 | qd->q.qlen--; | |
285 | return skb; | |
286 | } | |
287 | ||
288 | qdisc = q->queues[queue]; | |
289 | skb = qdisc->dequeue(qdisc); | |
290 | if (skb) { | |
291 | qd->q.qlen--; | |
292 | return skb; | |
293 | } | |
294 | } | |
295 | /* returning a NULL here when all the h/w queues are full means we | |
296 | * never need to call netif_stop_queue in the driver */ | |
297 | return NULL; | |
298 | } | |
299 | ||
300 | ||
301 | static void wme_qdiscop_reset(struct Qdisc* qd) | |
302 | { | |
303 | struct ieee80211_sched_data *q = qdisc_priv(qd); | |
304 | struct ieee80211_local *local = wdev_priv(qd->dev->ieee80211_ptr); | |
305 | struct ieee80211_hw *hw = &local->hw; | |
306 | int queue; | |
307 | ||
308 | /* QUESTION: should we have some hardware flush functionality here? */ | |
309 | ||
e100bb64 | 310 | for (queue = 0; queue < QD_NUM(hw); queue++) { |
f0706e82 JB |
311 | skb_queue_purge(&q->requeued[queue]); |
312 | qdisc_reset(q->queues[queue]); | |
313 | } | |
314 | qd->q.qlen = 0; | |
315 | } | |
316 | ||
317 | ||
318 | static void wme_qdiscop_destroy(struct Qdisc* qd) | |
319 | { | |
320 | struct ieee80211_sched_data *q = qdisc_priv(qd); | |
321 | struct ieee80211_local *local = wdev_priv(qd->dev->ieee80211_ptr); | |
322 | struct ieee80211_hw *hw = &local->hw; | |
323 | int queue; | |
324 | ||
325 | tcf_destroy_chain(q->filter_list); | |
326 | q->filter_list = NULL; | |
327 | ||
e100bb64 | 328 | for (queue = 0; queue < QD_NUM(hw); queue++) { |
f0706e82 JB |
329 | skb_queue_purge(&q->requeued[queue]); |
330 | qdisc_destroy(q->queues[queue]); | |
331 | q->queues[queue] = &noop_qdisc; | |
332 | } | |
333 | } | |
334 | ||
335 | ||
336 | /* called whenever parameters are updated on existing qdisc */ | |
1e90474c | 337 | static int wme_qdiscop_tune(struct Qdisc *qd, struct nlattr *opt) |
f0706e82 | 338 | { |
f0706e82 JB |
339 | return 0; |
340 | } | |
341 | ||
342 | ||
343 | /* called during initial creation of qdisc on device */ | |
1e90474c | 344 | static int wme_qdiscop_init(struct Qdisc *qd, struct nlattr *opt) |
f0706e82 JB |
345 | { |
346 | struct ieee80211_sched_data *q = qdisc_priv(qd); | |
347 | struct net_device *dev = qd->dev; | |
348 | struct ieee80211_local *local; | |
e100bb64 | 349 | struct ieee80211_hw *hw; |
f0706e82 JB |
350 | int err = 0, i; |
351 | ||
352 | /* check that device is a mac80211 device */ | |
353 | if (!dev->ieee80211_ptr || | |
354 | dev->ieee80211_ptr->wiphy->privid != mac80211_wiphy_privid) | |
355 | return -EINVAL; | |
356 | ||
e100bb64 JB |
357 | local = wdev_priv(dev->ieee80211_ptr); |
358 | hw = &local->hw; | |
359 | ||
360 | /* only allow on master dev */ | |
361 | if (dev != local->mdev) | |
f0706e82 JB |
362 | return -EINVAL; |
363 | ||
e100bb64 JB |
364 | /* ensure that we are root qdisc */ |
365 | if (qd->parent != TC_H_ROOT) | |
f0706e82 JB |
366 | return -EINVAL; |
367 | ||
368 | if (qd->flags & TCQ_F_INGRESS) | |
369 | return -EINVAL; | |
370 | ||
f0706e82 | 371 | /* if options were passed in, set them */ |
e100bb64 | 372 | if (opt) |
f0706e82 | 373 | err = wme_qdiscop_tune(qd, opt); |
f0706e82 JB |
374 | |
375 | /* create child queues */ | |
e100bb64 | 376 | for (i = 0; i < QD_NUM(hw); i++) { |
f0706e82 JB |
377 | skb_queue_head_init(&q->requeued[i]); |
378 | q->queues[i] = qdisc_create_dflt(qd->dev, &pfifo_qdisc_ops, | |
379 | qd->handle); | |
136e83d6 | 380 | if (!q->queues[i]) { |
f0706e82 | 381 | q->queues[i] = &noop_qdisc; |
a4278e18 PR |
382 | printk(KERN_ERR "%s child qdisc %i creation failed\n", |
383 | dev->name, i); | |
f0706e82 JB |
384 | } |
385 | } | |
386 | ||
e100bb64 JB |
387 | /* non-aggregation queues: reserve/mark as used */ |
388 | for (i = 0; i < local->hw.queues; i++) | |
a9af2013 | 389 | set_bit(i, q->qdisc_pool); |
9e723492 | 390 | |
f0706e82 JB |
391 | return err; |
392 | } | |
393 | ||
394 | static int wme_qdiscop_dump(struct Qdisc *qd, struct sk_buff *skb) | |
395 | { | |
f0706e82 JB |
396 | return -1; |
397 | } | |
398 | ||
399 | ||
400 | static int wme_classop_graft(struct Qdisc *qd, unsigned long arg, | |
401 | struct Qdisc *new, struct Qdisc **old) | |
402 | { | |
403 | struct ieee80211_sched_data *q = qdisc_priv(qd); | |
404 | struct ieee80211_local *local = wdev_priv(qd->dev->ieee80211_ptr); | |
405 | struct ieee80211_hw *hw = &local->hw; | |
406 | unsigned long queue = arg - 1; | |
407 | ||
e100bb64 | 408 | if (queue >= QD_NUM(hw)) |
f0706e82 JB |
409 | return -EINVAL; |
410 | ||
411 | if (!new) | |
412 | new = &noop_qdisc; | |
413 | ||
414 | sch_tree_lock(qd); | |
415 | *old = q->queues[queue]; | |
416 | q->queues[queue] = new; | |
417 | qdisc_reset(*old); | |
418 | sch_tree_unlock(qd); | |
419 | ||
420 | return 0; | |
421 | } | |
422 | ||
423 | ||
424 | static struct Qdisc * | |
425 | wme_classop_leaf(struct Qdisc *qd, unsigned long arg) | |
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 | ||
e100bb64 | 432 | if (queue >= QD_NUM(hw)) |
f0706e82 JB |
433 | return NULL; |
434 | ||
435 | return q->queues[queue]; | |
436 | } | |
437 | ||
438 | ||
439 | static unsigned long wme_classop_get(struct Qdisc *qd, u32 classid) | |
440 | { | |
441 | struct ieee80211_local *local = wdev_priv(qd->dev->ieee80211_ptr); | |
442 | struct ieee80211_hw *hw = &local->hw; | |
443 | unsigned long queue = TC_H_MIN(classid); | |
444 | ||
e100bb64 | 445 | if (queue - 1 >= QD_NUM(hw)) |
f0706e82 JB |
446 | return 0; |
447 | ||
448 | return queue; | |
449 | } | |
450 | ||
451 | ||
452 | static unsigned long wme_classop_bind(struct Qdisc *qd, unsigned long parent, | |
453 | u32 classid) | |
454 | { | |
455 | return wme_classop_get(qd, classid); | |
456 | } | |
457 | ||
458 | ||
459 | static void wme_classop_put(struct Qdisc *q, unsigned long cl) | |
460 | { | |
461 | } | |
462 | ||
463 | ||
464 | static int wme_classop_change(struct Qdisc *qd, u32 handle, u32 parent, | |
1e90474c | 465 | struct nlattr **tca, unsigned long *arg) |
f0706e82 JB |
466 | { |
467 | unsigned long cl = *arg; | |
468 | struct ieee80211_local *local = wdev_priv(qd->dev->ieee80211_ptr); | |
469 | struct ieee80211_hw *hw = &local->hw; | |
470 | ||
e100bb64 | 471 | if (cl - 1 > QD_NUM(hw)) |
f0706e82 JB |
472 | return -ENOENT; |
473 | ||
474 | /* TODO: put code to program hardware queue parameters here, | |
475 | * to allow programming from tc command line */ | |
476 | ||
477 | return 0; | |
478 | } | |
479 | ||
480 | ||
481 | /* we don't support deleting hardware queues | |
482 | * when we add WMM-SA support - TSPECs may be deleted here */ | |
483 | static int wme_classop_delete(struct Qdisc *qd, unsigned long cl) | |
484 | { | |
485 | struct ieee80211_local *local = wdev_priv(qd->dev->ieee80211_ptr); | |
486 | struct ieee80211_hw *hw = &local->hw; | |
487 | ||
e100bb64 | 488 | if (cl - 1 > QD_NUM(hw)) |
f0706e82 JB |
489 | return -ENOENT; |
490 | return 0; | |
491 | } | |
492 | ||
493 | ||
494 | static int wme_classop_dump_class(struct Qdisc *qd, unsigned long cl, | |
495 | struct sk_buff *skb, struct tcmsg *tcm) | |
496 | { | |
497 | struct ieee80211_sched_data *q = qdisc_priv(qd); | |
498 | struct ieee80211_local *local = wdev_priv(qd->dev->ieee80211_ptr); | |
499 | struct ieee80211_hw *hw = &local->hw; | |
500 | ||
e100bb64 | 501 | if (cl - 1 > QD_NUM(hw)) |
f0706e82 JB |
502 | return -ENOENT; |
503 | tcm->tcm_handle = TC_H_MIN(cl); | |
504 | tcm->tcm_parent = qd->handle; | |
505 | tcm->tcm_info = q->queues[cl-1]->handle; /* do we need this? */ | |
506 | return 0; | |
507 | } | |
508 | ||
509 | ||
510 | static void wme_classop_walk(struct Qdisc *qd, struct qdisc_walker *arg) | |
511 | { | |
512 | struct ieee80211_local *local = wdev_priv(qd->dev->ieee80211_ptr); | |
513 | struct ieee80211_hw *hw = &local->hw; | |
514 | int queue; | |
515 | ||
516 | if (arg->stop) | |
517 | return; | |
518 | ||
e100bb64 | 519 | for (queue = 0; queue < QD_NUM(hw); queue++) { |
f0706e82 JB |
520 | if (arg->count < arg->skip) { |
521 | arg->count++; | |
522 | continue; | |
523 | } | |
524 | /* we should return classids for our internal queues here | |
525 | * as well as the external ones */ | |
526 | if (arg->fn(qd, queue+1, arg) < 0) { | |
527 | arg->stop = 1; | |
528 | break; | |
529 | } | |
530 | arg->count++; | |
531 | } | |
532 | } | |
533 | ||
534 | ||
535 | static struct tcf_proto ** wme_classop_find_tcf(struct Qdisc *qd, | |
536 | unsigned long cl) | |
537 | { | |
538 | struct ieee80211_sched_data *q = qdisc_priv(qd); | |
539 | ||
540 | if (cl) | |
541 | return NULL; | |
542 | ||
543 | return &q->filter_list; | |
544 | } | |
545 | ||
546 | ||
547 | /* this qdisc is classful (i.e. has classes, some of which may have leaf qdiscs attached) | |
548 | * - these are the operations on the classes */ | |
20fea08b | 549 | static const struct Qdisc_class_ops class_ops = |
f0706e82 JB |
550 | { |
551 | .graft = wme_classop_graft, | |
552 | .leaf = wme_classop_leaf, | |
553 | ||
554 | .get = wme_classop_get, | |
555 | .put = wme_classop_put, | |
556 | .change = wme_classop_change, | |
557 | .delete = wme_classop_delete, | |
558 | .walk = wme_classop_walk, | |
559 | ||
560 | .tcf_chain = wme_classop_find_tcf, | |
561 | .bind_tcf = wme_classop_bind, | |
562 | .unbind_tcf = wme_classop_put, | |
563 | ||
564 | .dump = wme_classop_dump_class, | |
565 | }; | |
566 | ||
567 | ||
568 | /* queueing discipline operations */ | |
20fea08b | 569 | static struct Qdisc_ops wme_qdisc_ops __read_mostly = |
f0706e82 JB |
570 | { |
571 | .next = NULL, | |
572 | .cl_ops = &class_ops, | |
573 | .id = "ieee80211", | |
574 | .priv_size = sizeof(struct ieee80211_sched_data), | |
575 | ||
576 | .enqueue = wme_qdiscop_enqueue, | |
577 | .dequeue = wme_qdiscop_dequeue, | |
578 | .requeue = wme_qdiscop_requeue, | |
579 | .drop = NULL, /* drop not needed since we are always the root qdisc */ | |
580 | ||
581 | .init = wme_qdiscop_init, | |
582 | .reset = wme_qdiscop_reset, | |
583 | .destroy = wme_qdiscop_destroy, | |
584 | .change = wme_qdiscop_tune, | |
585 | ||
586 | .dump = wme_qdiscop_dump, | |
587 | }; | |
588 | ||
589 | ||
590 | void ieee80211_install_qdisc(struct net_device *dev) | |
591 | { | |
592 | struct Qdisc *qdisc; | |
593 | ||
594 | qdisc = qdisc_create_dflt(dev, &wme_qdisc_ops, TC_H_ROOT); | |
595 | if (!qdisc) { | |
596 | printk(KERN_ERR "%s: qdisc installation failed\n", dev->name); | |
597 | return; | |
598 | } | |
599 | ||
600 | /* same handle as would be allocated by qdisc_alloc_handle() */ | |
601 | qdisc->handle = 0x80010000; | |
602 | ||
603 | qdisc_lock_tree(dev); | |
604 | list_add_tail(&qdisc->list, &dev->qdisc_list); | |
605 | dev->qdisc_sleeping = qdisc; | |
606 | qdisc_unlock_tree(dev); | |
607 | } | |
608 | ||
609 | ||
610 | int ieee80211_qdisc_installed(struct net_device *dev) | |
611 | { | |
612 | return dev->qdisc_sleeping->ops == &wme_qdisc_ops; | |
613 | } | |
614 | ||
615 | ||
616 | int ieee80211_wme_register(void) | |
617 | { | |
618 | return register_qdisc(&wme_qdisc_ops); | |
619 | } | |
620 | ||
621 | ||
622 | void ieee80211_wme_unregister(void) | |
623 | { | |
624 | unregister_qdisc(&wme_qdisc_ops); | |
625 | } | |
9e723492 RR |
626 | |
627 | int ieee80211_ht_agg_queue_add(struct ieee80211_local *local, | |
628 | struct sta_info *sta, u16 tid) | |
629 | { | |
630 | int i; | |
631 | struct ieee80211_sched_data *q = | |
632 | qdisc_priv(local->mdev->qdisc_sleeping); | |
633 | DECLARE_MAC_BUF(mac); | |
634 | ||
635 | /* prepare the filter and save it for the SW queue | |
e100bb64 JB |
636 | * matching the received HW queue */ |
637 | ||
638 | if (!local->hw.ampdu_queues) | |
639 | return -EPERM; | |
9e723492 RR |
640 | |
641 | /* try to get a Qdisc from the pool */ | |
e100bb64 | 642 | for (i = local->hw.queues; i < QD_NUM(&local->hw); i++) |
a9af2013 | 643 | if (!test_and_set_bit(i, q->qdisc_pool)) { |
9e723492 RR |
644 | ieee80211_stop_queue(local_to_hw(local), i); |
645 | sta->tid_to_tx_q[tid] = i; | |
646 | ||
647 | /* IF there are already pending packets | |
648 | * on this tid first we need to drain them | |
649 | * on the previous queue | |
650 | * since HT is strict in order */ | |
651 | #ifdef CONFIG_MAC80211_HT_DEBUG | |
652 | if (net_ratelimit()) | |
653 | printk(KERN_DEBUG "allocated aggregation queue" | |
a9af2013 | 654 | " %d tid %d addr %s pool=0x%lX", |
9e723492 | 655 | i, tid, print_mac(mac, sta->addr), |
a9af2013 | 656 | q->qdisc_pool[0]); |
9e723492 RR |
657 | #endif /* CONFIG_MAC80211_HT_DEBUG */ |
658 | return 0; | |
659 | } | |
660 | ||
661 | return -EAGAIN; | |
662 | } | |
663 | ||
664 | /** | |
665 | * the caller needs to hold local->mdev->queue_lock | |
666 | */ | |
667 | void ieee80211_ht_agg_queue_remove(struct ieee80211_local *local, | |
668 | struct sta_info *sta, u16 tid, | |
669 | u8 requeue) | |
670 | { | |
e100bb64 | 671 | struct ieee80211_hw *hw = &local->hw; |
9e723492 RR |
672 | struct ieee80211_sched_data *q = |
673 | qdisc_priv(local->mdev->qdisc_sleeping); | |
674 | int agg_queue = sta->tid_to_tx_q[tid]; | |
675 | ||
676 | /* return the qdisc to the pool */ | |
a9af2013 | 677 | clear_bit(agg_queue, q->qdisc_pool); |
e100bb64 | 678 | sta->tid_to_tx_q[tid] = QD_NUM(hw); |
9e723492 RR |
679 | |
680 | if (requeue) | |
681 | ieee80211_requeue(local, agg_queue); | |
682 | else | |
683 | q->queues[agg_queue]->ops->reset(q->queues[agg_queue]); | |
684 | } | |
685 | ||
686 | void ieee80211_requeue(struct ieee80211_local *local, int queue) | |
687 | { | |
688 | struct Qdisc *root_qd = local->mdev->qdisc_sleeping; | |
689 | struct ieee80211_sched_data *q = qdisc_priv(root_qd); | |
690 | struct Qdisc *qdisc = q->queues[queue]; | |
691 | struct sk_buff *skb = NULL; | |
0da926f0 | 692 | u32 len; |
9e723492 RR |
693 | |
694 | if (!qdisc || !qdisc->dequeue) | |
695 | return; | |
696 | ||
697 | printk(KERN_DEBUG "requeue: qlen = %d\n", qdisc->q.qlen); | |
698 | for (len = qdisc->q.qlen; len > 0; len--) { | |
699 | skb = qdisc->dequeue(qdisc); | |
700 | root_qd->q.qlen--; | |
701 | /* packet will be classified again and */ | |
702 | /* skb->packet_data->queue will be overridden if needed */ | |
703 | if (skb) | |
704 | wme_qdiscop_enqueue(skb, root_qd); | |
705 | } | |
706 | } |