Commit | Line | Data |
---|---|---|
181d6902 | 1 | /* |
7e613e16 ID |
2 | Copyright (C) 2010 Willow Garage <http://www.willowgarage.com> |
3 | Copyright (C) 2004 - 2010 Ivo van Doorn <IvDoorn@gmail.com> | |
9c9a0d14 | 4 | Copyright (C) 2004 - 2009 Gertjan van Wingerde <gwingerde@gmail.com> |
181d6902 ID |
5 | <http://rt2x00.serialmonkey.com> |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 2 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | This program is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with this program; if not, write to the | |
19 | Free Software Foundation, Inc., | |
20 | 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
21 | */ | |
22 | ||
23 | /* | |
24 | Module: rt2x00lib | |
25 | Abstract: rt2x00 queue specific routines. | |
26 | */ | |
27 | ||
5a0e3ad6 | 28 | #include <linux/slab.h> |
181d6902 ID |
29 | #include <linux/kernel.h> |
30 | #include <linux/module.h> | |
c4da0048 | 31 | #include <linux/dma-mapping.h> |
181d6902 ID |
32 | |
33 | #include "rt2x00.h" | |
34 | #include "rt2x00lib.h" | |
35 | ||
fa69560f | 36 | struct sk_buff *rt2x00queue_alloc_rxskb(struct queue_entry *entry) |
239c249d | 37 | { |
fa69560f | 38 | struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev; |
c4da0048 GW |
39 | struct sk_buff *skb; |
40 | struct skb_frame_desc *skbdesc; | |
2bb057d0 ID |
41 | unsigned int frame_size; |
42 | unsigned int head_size = 0; | |
43 | unsigned int tail_size = 0; | |
239c249d GW |
44 | |
45 | /* | |
46 | * The frame size includes descriptor size, because the | |
47 | * hardware directly receive the frame into the skbuffer. | |
48 | */ | |
c4da0048 | 49 | frame_size = entry->queue->data_size + entry->queue->desc_size; |
239c249d GW |
50 | |
51 | /* | |
ff352391 ID |
52 | * The payload should be aligned to a 4-byte boundary, |
53 | * this means we need at least 3 bytes for moving the frame | |
54 | * into the correct offset. | |
239c249d | 55 | */ |
2bb057d0 ID |
56 | head_size = 4; |
57 | ||
58 | /* | |
59 | * For IV/EIV/ICV assembly we must make sure there is | |
60 | * at least 8 bytes bytes available in headroom for IV/EIV | |
9c3444d3 | 61 | * and 8 bytes for ICV data as tailroon. |
2bb057d0 | 62 | */ |
2bb057d0 ID |
63 | if (test_bit(CONFIG_SUPPORT_HW_CRYPTO, &rt2x00dev->flags)) { |
64 | head_size += 8; | |
9c3444d3 | 65 | tail_size += 8; |
2bb057d0 | 66 | } |
239c249d GW |
67 | |
68 | /* | |
69 | * Allocate skbuffer. | |
70 | */ | |
2bb057d0 | 71 | skb = dev_alloc_skb(frame_size + head_size + tail_size); |
239c249d GW |
72 | if (!skb) |
73 | return NULL; | |
74 | ||
2bb057d0 ID |
75 | /* |
76 | * Make sure we not have a frame with the requested bytes | |
77 | * available in the head and tail. | |
78 | */ | |
79 | skb_reserve(skb, head_size); | |
239c249d GW |
80 | skb_put(skb, frame_size); |
81 | ||
c4da0048 GW |
82 | /* |
83 | * Populate skbdesc. | |
84 | */ | |
85 | skbdesc = get_skb_frame_desc(skb); | |
86 | memset(skbdesc, 0, sizeof(*skbdesc)); | |
87 | skbdesc->entry = entry; | |
88 | ||
89 | if (test_bit(DRIVER_REQUIRE_DMA, &rt2x00dev->flags)) { | |
90 | skbdesc->skb_dma = dma_map_single(rt2x00dev->dev, | |
91 | skb->data, | |
92 | skb->len, | |
93 | DMA_FROM_DEVICE); | |
94 | skbdesc->flags |= SKBDESC_DMA_MAPPED_RX; | |
95 | } | |
96 | ||
239c249d GW |
97 | return skb; |
98 | } | |
30caa6e3 | 99 | |
fa69560f | 100 | void rt2x00queue_map_txskb(struct queue_entry *entry) |
30caa6e3 | 101 | { |
fa69560f ID |
102 | struct device *dev = entry->queue->rt2x00dev->dev; |
103 | struct skb_frame_desc *skbdesc = get_skb_frame_desc(entry->skb); | |
c4da0048 | 104 | |
3ee54a07 | 105 | skbdesc->skb_dma = |
fa69560f | 106 | dma_map_single(dev, entry->skb->data, entry->skb->len, DMA_TO_DEVICE); |
c4da0048 GW |
107 | skbdesc->flags |= SKBDESC_DMA_MAPPED_TX; |
108 | } | |
109 | EXPORT_SYMBOL_GPL(rt2x00queue_map_txskb); | |
110 | ||
fa69560f | 111 | void rt2x00queue_unmap_skb(struct queue_entry *entry) |
c4da0048 | 112 | { |
fa69560f ID |
113 | struct device *dev = entry->queue->rt2x00dev->dev; |
114 | struct skb_frame_desc *skbdesc = get_skb_frame_desc(entry->skb); | |
c4da0048 GW |
115 | |
116 | if (skbdesc->flags & SKBDESC_DMA_MAPPED_RX) { | |
fa69560f | 117 | dma_unmap_single(dev, skbdesc->skb_dma, entry->skb->len, |
c4da0048 GW |
118 | DMA_FROM_DEVICE); |
119 | skbdesc->flags &= ~SKBDESC_DMA_MAPPED_RX; | |
546adf29 | 120 | } else if (skbdesc->flags & SKBDESC_DMA_MAPPED_TX) { |
fa69560f | 121 | dma_unmap_single(dev, skbdesc->skb_dma, entry->skb->len, |
c4da0048 GW |
122 | DMA_TO_DEVICE); |
123 | skbdesc->flags &= ~SKBDESC_DMA_MAPPED_TX; | |
124 | } | |
125 | } | |
0b8004aa | 126 | EXPORT_SYMBOL_GPL(rt2x00queue_unmap_skb); |
c4da0048 | 127 | |
fa69560f | 128 | void rt2x00queue_free_skb(struct queue_entry *entry) |
c4da0048 | 129 | { |
fa69560f | 130 | if (!entry->skb) |
9a613195 ID |
131 | return; |
132 | ||
fa69560f ID |
133 | rt2x00queue_unmap_skb(entry); |
134 | dev_kfree_skb_any(entry->skb); | |
135 | entry->skb = NULL; | |
30caa6e3 | 136 | } |
239c249d | 137 | |
daee6c09 | 138 | void rt2x00queue_align_frame(struct sk_buff *skb) |
9f166171 | 139 | { |
9f166171 | 140 | unsigned int frame_length = skb->len; |
daee6c09 | 141 | unsigned int align = ALIGN_SIZE(skb, 0); |
9f166171 ID |
142 | |
143 | if (!align) | |
144 | return; | |
145 | ||
daee6c09 ID |
146 | skb_push(skb, align); |
147 | memmove(skb->data, skb->data + align, frame_length); | |
148 | skb_trim(skb, frame_length); | |
149 | } | |
150 | ||
95d69aa0 | 151 | void rt2x00queue_align_payload(struct sk_buff *skb, unsigned int header_length) |
daee6c09 ID |
152 | { |
153 | unsigned int frame_length = skb->len; | |
95d69aa0 | 154 | unsigned int align = ALIGN_SIZE(skb, header_length); |
daee6c09 ID |
155 | |
156 | if (!align) | |
157 | return; | |
158 | ||
159 | skb_push(skb, align); | |
160 | memmove(skb->data, skb->data + align, frame_length); | |
161 | skb_trim(skb, frame_length); | |
162 | } | |
163 | ||
164 | void rt2x00queue_insert_l2pad(struct sk_buff *skb, unsigned int header_length) | |
165 | { | |
2e331462 | 166 | unsigned int payload_length = skb->len - header_length; |
daee6c09 ID |
167 | unsigned int header_align = ALIGN_SIZE(skb, 0); |
168 | unsigned int payload_align = ALIGN_SIZE(skb, header_length); | |
e54be4e7 | 169 | unsigned int l2pad = payload_length ? L2PAD_SIZE(header_length) : 0; |
daee6c09 | 170 | |
2e331462 GW |
171 | /* |
172 | * Adjust the header alignment if the payload needs to be moved more | |
173 | * than the header. | |
174 | */ | |
175 | if (payload_align > header_align) | |
176 | header_align += 4; | |
177 | ||
178 | /* There is nothing to do if no alignment is needed */ | |
179 | if (!header_align) | |
180 | return; | |
daee6c09 | 181 | |
2e331462 GW |
182 | /* Reserve the amount of space needed in front of the frame */ |
183 | skb_push(skb, header_align); | |
184 | ||
185 | /* | |
186 | * Move the header. | |
187 | */ | |
188 | memmove(skb->data, skb->data + header_align, header_length); | |
189 | ||
190 | /* Move the payload, if present and if required */ | |
191 | if (payload_length && payload_align) | |
daee6c09 | 192 | memmove(skb->data + header_length + l2pad, |
a5186e99 | 193 | skb->data + header_length + l2pad + payload_align, |
2e331462 GW |
194 | payload_length); |
195 | ||
196 | /* Trim the skb to the correct size */ | |
197 | skb_trim(skb, header_length + l2pad + payload_length); | |
9f166171 ID |
198 | } |
199 | ||
daee6c09 ID |
200 | void rt2x00queue_remove_l2pad(struct sk_buff *skb, unsigned int header_length) |
201 | { | |
a061a93b GW |
202 | /* |
203 | * L2 padding is only present if the skb contains more than just the | |
204 | * IEEE 802.11 header. | |
205 | */ | |
206 | unsigned int l2pad = (skb->len > header_length) ? | |
207 | L2PAD_SIZE(header_length) : 0; | |
daee6c09 | 208 | |
354e39db | 209 | if (!l2pad) |
daee6c09 ID |
210 | return; |
211 | ||
a061a93b GW |
212 | memmove(skb->data + l2pad, skb->data, header_length); |
213 | skb_pull(skb, l2pad); | |
daee6c09 ID |
214 | } |
215 | ||
7b40982e ID |
216 | static void rt2x00queue_create_tx_descriptor_seq(struct queue_entry *entry, |
217 | struct txentry_desc *txdesc) | |
218 | { | |
219 | struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(entry->skb); | |
220 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)entry->skb->data; | |
221 | struct rt2x00_intf *intf = vif_to_intf(tx_info->control.vif); | |
222 | unsigned long irqflags; | |
223 | ||
224 | if (!(tx_info->flags & IEEE80211_TX_CTL_ASSIGN_SEQ) || | |
225 | unlikely(!tx_info->control.vif)) | |
226 | return; | |
227 | ||
228 | /* | |
229 | * Hardware should insert sequence counter. | |
230 | * FIXME: We insert a software sequence counter first for | |
231 | * hardware that doesn't support hardware sequence counting. | |
232 | * | |
233 | * This is wrong because beacons are not getting sequence | |
234 | * numbers assigned properly. | |
235 | * | |
236 | * A secondary problem exists for drivers that cannot toggle | |
237 | * sequence counting per-frame, since those will override the | |
238 | * sequence counter given by mac80211. | |
239 | */ | |
240 | spin_lock_irqsave(&intf->seqlock, irqflags); | |
241 | ||
242 | if (test_bit(ENTRY_TXD_FIRST_FRAGMENT, &txdesc->flags)) | |
243 | intf->seqno += 0x10; | |
244 | hdr->seq_ctrl &= cpu_to_le16(IEEE80211_SCTL_FRAG); | |
245 | hdr->seq_ctrl |= cpu_to_le16(intf->seqno); | |
246 | ||
247 | spin_unlock_irqrestore(&intf->seqlock, irqflags); | |
248 | ||
249 | __set_bit(ENTRY_TXD_GENERATE_SEQ, &txdesc->flags); | |
250 | } | |
251 | ||
252 | static void rt2x00queue_create_tx_descriptor_plcp(struct queue_entry *entry, | |
253 | struct txentry_desc *txdesc, | |
254 | const struct rt2x00_rate *hwrate) | |
255 | { | |
256 | struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev; | |
257 | struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(entry->skb); | |
258 | struct ieee80211_tx_rate *txrate = &tx_info->control.rates[0]; | |
259 | unsigned int data_length; | |
260 | unsigned int duration; | |
261 | unsigned int residual; | |
262 | ||
263 | /* Data length + CRC + Crypto overhead (IV/EIV/ICV/MIC) */ | |
264 | data_length = entry->skb->len + 4; | |
265 | data_length += rt2x00crypto_tx_overhead(rt2x00dev, entry->skb); | |
266 | ||
267 | /* | |
268 | * PLCP setup | |
269 | * Length calculation depends on OFDM/CCK rate. | |
270 | */ | |
271 | txdesc->signal = hwrate->plcp; | |
272 | txdesc->service = 0x04; | |
273 | ||
274 | if (hwrate->flags & DEV_RATE_OFDM) { | |
275 | txdesc->length_high = (data_length >> 6) & 0x3f; | |
276 | txdesc->length_low = data_length & 0x3f; | |
277 | } else { | |
278 | /* | |
279 | * Convert length to microseconds. | |
280 | */ | |
281 | residual = GET_DURATION_RES(data_length, hwrate->bitrate); | |
282 | duration = GET_DURATION(data_length, hwrate->bitrate); | |
283 | ||
284 | if (residual != 0) { | |
285 | duration++; | |
286 | ||
287 | /* | |
288 | * Check if we need to set the Length Extension | |
289 | */ | |
290 | if (hwrate->bitrate == 110 && residual <= 30) | |
291 | txdesc->service |= 0x80; | |
292 | } | |
293 | ||
294 | txdesc->length_high = (duration >> 8) & 0xff; | |
295 | txdesc->length_low = duration & 0xff; | |
296 | ||
297 | /* | |
298 | * When preamble is enabled we should set the | |
299 | * preamble bit for the signal. | |
300 | */ | |
301 | if (txrate->flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE) | |
302 | txdesc->signal |= 0x08; | |
303 | } | |
304 | } | |
305 | ||
bd88a781 ID |
306 | static void rt2x00queue_create_tx_descriptor(struct queue_entry *entry, |
307 | struct txentry_desc *txdesc) | |
7050ec82 | 308 | { |
2e92e6f2 | 309 | struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev; |
e039fa4a | 310 | struct ieee80211_tx_info *tx_info = IEEE80211_SKB_CB(entry->skb); |
7050ec82 | 311 | struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)entry->skb->data; |
2e92e6f2 | 312 | struct ieee80211_rate *rate = |
e039fa4a | 313 | ieee80211_get_tx_rate(rt2x00dev->hw, tx_info); |
7050ec82 | 314 | const struct rt2x00_rate *hwrate; |
7050ec82 ID |
315 | |
316 | memset(txdesc, 0, sizeof(*txdesc)); | |
317 | ||
9f166171 | 318 | /* |
df624ca5 | 319 | * Header and frame information. |
9f166171 | 320 | */ |
df624ca5 | 321 | txdesc->length = entry->skb->len; |
9f166171 | 322 | txdesc->header_length = ieee80211_get_hdrlen_from_skb(entry->skb); |
9f166171 | 323 | |
7050ec82 ID |
324 | /* |
325 | * Check whether this frame is to be acked. | |
326 | */ | |
e039fa4a | 327 | if (!(tx_info->flags & IEEE80211_TX_CTL_NO_ACK)) |
7050ec82 ID |
328 | __set_bit(ENTRY_TXD_ACK, &txdesc->flags); |
329 | ||
330 | /* | |
331 | * Check if this is a RTS/CTS frame | |
332 | */ | |
ac104462 ID |
333 | if (ieee80211_is_rts(hdr->frame_control) || |
334 | ieee80211_is_cts(hdr->frame_control)) { | |
7050ec82 | 335 | __set_bit(ENTRY_TXD_BURST, &txdesc->flags); |
ac104462 | 336 | if (ieee80211_is_rts(hdr->frame_control)) |
7050ec82 | 337 | __set_bit(ENTRY_TXD_RTS_FRAME, &txdesc->flags); |
e039fa4a | 338 | else |
7050ec82 | 339 | __set_bit(ENTRY_TXD_CTS_FRAME, &txdesc->flags); |
e039fa4a | 340 | if (tx_info->control.rts_cts_rate_idx >= 0) |
2e92e6f2 | 341 | rate = |
e039fa4a | 342 | ieee80211_get_rts_cts_rate(rt2x00dev->hw, tx_info); |
7050ec82 ID |
343 | } |
344 | ||
345 | /* | |
346 | * Determine retry information. | |
347 | */ | |
e6a9854b | 348 | txdesc->retry_limit = tx_info->control.rates[0].count - 1; |
42c82857 | 349 | if (txdesc->retry_limit >= rt2x00dev->long_retry) |
7050ec82 ID |
350 | __set_bit(ENTRY_TXD_RETRY_MODE, &txdesc->flags); |
351 | ||
352 | /* | |
353 | * Check if more fragments are pending | |
354 | */ | |
2606e422 | 355 | if (ieee80211_has_morefrags(hdr->frame_control)) { |
7050ec82 ID |
356 | __set_bit(ENTRY_TXD_BURST, &txdesc->flags); |
357 | __set_bit(ENTRY_TXD_MORE_FRAG, &txdesc->flags); | |
358 | } | |
359 | ||
2606e422 HS |
360 | /* |
361 | * Check if more frames (!= fragments) are pending | |
362 | */ | |
363 | if (tx_info->flags & IEEE80211_TX_CTL_MORE_FRAMES) | |
364 | __set_bit(ENTRY_TXD_BURST, &txdesc->flags); | |
365 | ||
7050ec82 ID |
366 | /* |
367 | * Beacons and probe responses require the tsf timestamp | |
e81e0aef AB |
368 | * to be inserted into the frame, except for a frame that has been injected |
369 | * through a monitor interface. This latter is needed for testing a | |
370 | * monitor interface. | |
7050ec82 | 371 | */ |
e81e0aef AB |
372 | if ((ieee80211_is_beacon(hdr->frame_control) || |
373 | ieee80211_is_probe_resp(hdr->frame_control)) && | |
374 | (!(tx_info->flags & IEEE80211_TX_CTL_INJECTED))) | |
7050ec82 ID |
375 | __set_bit(ENTRY_TXD_REQ_TIMESTAMP, &txdesc->flags); |
376 | ||
377 | /* | |
378 | * Determine with what IFS priority this frame should be send. | |
379 | * Set ifs to IFS_SIFS when the this is not the first fragment, | |
380 | * or this fragment came after RTS/CTS. | |
381 | */ | |
7b40982e ID |
382 | if ((tx_info->flags & IEEE80211_TX_CTL_FIRST_FRAGMENT) && |
383 | !test_bit(ENTRY_TXD_RTS_FRAME, &txdesc->flags)) { | |
7050ec82 ID |
384 | __set_bit(ENTRY_TXD_FIRST_FRAGMENT, &txdesc->flags); |
385 | txdesc->ifs = IFS_BACKOFF; | |
7b40982e | 386 | } else |
7050ec82 | 387 | txdesc->ifs = IFS_SIFS; |
7050ec82 | 388 | |
076f9582 ID |
389 | /* |
390 | * Determine rate modulation. | |
391 | */ | |
7050ec82 | 392 | hwrate = rt2x00_get_rate(rate->hw_value); |
076f9582 | 393 | txdesc->rate_mode = RATE_MODE_CCK; |
7b40982e | 394 | if (hwrate->flags & DEV_RATE_OFDM) |
076f9582 | 395 | txdesc->rate_mode = RATE_MODE_OFDM; |
7050ec82 | 396 | |
7b40982e ID |
397 | /* |
398 | * Apply TX descriptor handling by components | |
399 | */ | |
400 | rt2x00crypto_create_tx_descriptor(entry, txdesc); | |
35f00cfc | 401 | rt2x00ht_create_tx_descriptor(entry, txdesc, hwrate); |
7b40982e ID |
402 | rt2x00queue_create_tx_descriptor_seq(entry, txdesc); |
403 | rt2x00queue_create_tx_descriptor_plcp(entry, txdesc, hwrate); | |
7050ec82 | 404 | } |
7050ec82 | 405 | |
78eea11b GW |
406 | static int rt2x00queue_write_tx_data(struct queue_entry *entry, |
407 | struct txentry_desc *txdesc) | |
408 | { | |
409 | struct rt2x00_dev *rt2x00dev = entry->queue->rt2x00dev; | |
410 | ||
411 | /* | |
412 | * This should not happen, we already checked the entry | |
413 | * was ours. When the hardware disagrees there has been | |
414 | * a queue corruption! | |
415 | */ | |
416 | if (unlikely(rt2x00dev->ops->lib->get_entry_state && | |
417 | rt2x00dev->ops->lib->get_entry_state(entry))) { | |
418 | ERROR(rt2x00dev, | |
419 | "Corrupt queue %d, accessing entry which is not ours.\n" | |
420 | "Please file bug report to %s.\n", | |
421 | entry->queue->qid, DRV_PROJECT); | |
422 | return -EINVAL; | |
423 | } | |
424 | ||
425 | /* | |
426 | * Add the requested extra tx headroom in front of the skb. | |
427 | */ | |
428 | skb_push(entry->skb, rt2x00dev->ops->extra_tx_headroom); | |
429 | memset(entry->skb->data, 0, rt2x00dev->ops->extra_tx_headroom); | |
430 | ||
431 | /* | |
76dd5ddf | 432 | * Call the driver's write_tx_data function, if it exists. |
78eea11b | 433 | */ |
76dd5ddf GW |
434 | if (rt2x00dev->ops->lib->write_tx_data) |
435 | rt2x00dev->ops->lib->write_tx_data(entry, txdesc); | |
78eea11b GW |
436 | |
437 | /* | |
438 | * Map the skb to DMA. | |
439 | */ | |
440 | if (test_bit(DRIVER_REQUIRE_DMA, &rt2x00dev->flags)) | |
fa69560f | 441 | rt2x00queue_map_txskb(entry); |
78eea11b GW |
442 | |
443 | return 0; | |
444 | } | |
445 | ||
bd88a781 ID |
446 | static void rt2x00queue_write_tx_descriptor(struct queue_entry *entry, |
447 | struct txentry_desc *txdesc) | |
7050ec82 | 448 | { |
b869767b | 449 | struct data_queue *queue = entry->queue; |
7050ec82 | 450 | |
93331458 | 451 | queue->rt2x00dev->ops->lib->write_tx_desc(entry, txdesc); |
7050ec82 ID |
452 | |
453 | /* | |
454 | * All processing on the frame has been completed, this means | |
455 | * it is now ready to be dumped to userspace through debugfs. | |
456 | */ | |
93331458 | 457 | rt2x00debug_dump_frame(queue->rt2x00dev, DUMP_FRAME_TX, entry->skb); |
6295d815 GW |
458 | } |
459 | ||
8be4eed0 | 460 | static void rt2x00queue_kick_tx_queue(struct data_queue *queue, |
6295d815 GW |
461 | struct txentry_desc *txdesc) |
462 | { | |
7050ec82 | 463 | /* |
b869767b | 464 | * Check if we need to kick the queue, there are however a few rules |
6295d815 | 465 | * 1) Don't kick unless this is the last in frame in a burst. |
b869767b ID |
466 | * When the burst flag is set, this frame is always followed |
467 | * by another frame which in some way are related to eachother. | |
468 | * This is true for fragments, RTS or CTS-to-self frames. | |
6295d815 | 469 | * 2) Rule 1 can be broken when the available entries |
b869767b | 470 | * in the queue are less then a certain threshold. |
7050ec82 | 471 | */ |
b869767b ID |
472 | if (rt2x00queue_threshold(queue) || |
473 | !test_bit(ENTRY_TXD_BURST, &txdesc->flags)) | |
dbba306f | 474 | queue->rt2x00dev->ops->lib->kick_queue(queue); |
7050ec82 | 475 | } |
7050ec82 | 476 | |
7351c6bd JB |
477 | int rt2x00queue_write_tx_frame(struct data_queue *queue, struct sk_buff *skb, |
478 | bool local) | |
6db3786a | 479 | { |
e6a9854b | 480 | struct ieee80211_tx_info *tx_info; |
6db3786a ID |
481 | struct queue_entry *entry = rt2x00queue_get_entry(queue, Q_INDEX); |
482 | struct txentry_desc txdesc; | |
d74f5ba4 | 483 | struct skb_frame_desc *skbdesc; |
e6a9854b | 484 | u8 rate_idx, rate_flags; |
6db3786a ID |
485 | |
486 | if (unlikely(rt2x00queue_full(queue))) | |
0e3de998 | 487 | return -ENOBUFS; |
6db3786a | 488 | |
c6084d5f HS |
489 | if (unlikely(test_and_set_bit(ENTRY_OWNER_DEVICE_DATA, |
490 | &entry->flags))) { | |
6db3786a ID |
491 | ERROR(queue->rt2x00dev, |
492 | "Arrived at non-free entry in the non-full queue %d.\n" | |
493 | "Please file bug report to %s.\n", | |
494 | queue->qid, DRV_PROJECT); | |
495 | return -EINVAL; | |
496 | } | |
497 | ||
498 | /* | |
499 | * Copy all TX descriptor information into txdesc, | |
500 | * after that we are free to use the skb->cb array | |
501 | * for our information. | |
502 | */ | |
503 | entry->skb = skb; | |
504 | rt2x00queue_create_tx_descriptor(entry, &txdesc); | |
505 | ||
d74f5ba4 | 506 | /* |
e6a9854b | 507 | * All information is retrieved from the skb->cb array, |
2bb057d0 | 508 | * now we should claim ownership of the driver part of that |
e6a9854b | 509 | * array, preserving the bitrate index and flags. |
d74f5ba4 | 510 | */ |
e6a9854b JB |
511 | tx_info = IEEE80211_SKB_CB(skb); |
512 | rate_idx = tx_info->control.rates[0].idx; | |
513 | rate_flags = tx_info->control.rates[0].flags; | |
0e3de998 | 514 | skbdesc = get_skb_frame_desc(skb); |
d74f5ba4 ID |
515 | memset(skbdesc, 0, sizeof(*skbdesc)); |
516 | skbdesc->entry = entry; | |
e6a9854b JB |
517 | skbdesc->tx_rate_idx = rate_idx; |
518 | skbdesc->tx_rate_flags = rate_flags; | |
d74f5ba4 | 519 | |
7351c6bd JB |
520 | if (local) |
521 | skbdesc->flags |= SKBDESC_NOT_MAC80211; | |
522 | ||
2bb057d0 ID |
523 | /* |
524 | * When hardware encryption is supported, and this frame | |
525 | * is to be encrypted, we should strip the IV/EIV data from | |
3ad2f3fb | 526 | * the frame so we can provide it to the driver separately. |
2bb057d0 ID |
527 | */ |
528 | if (test_bit(ENTRY_TXD_ENCRYPT, &txdesc.flags) && | |
dddfb478 | 529 | !test_bit(ENTRY_TXD_ENCRYPT_IV, &txdesc.flags)) { |
3f787bd6 | 530 | if (test_bit(DRIVER_REQUIRE_COPY_IV, &queue->rt2x00dev->flags)) |
9eb4e21e | 531 | rt2x00crypto_tx_copy_iv(skb, &txdesc); |
dddfb478 | 532 | else |
9eb4e21e | 533 | rt2x00crypto_tx_remove_iv(skb, &txdesc); |
dddfb478 | 534 | } |
2bb057d0 | 535 | |
93354cbb ID |
536 | /* |
537 | * When DMA allocation is required we should guarentee to the | |
538 | * driver that the DMA is aligned to a 4-byte boundary. | |
93354cbb ID |
539 | * However some drivers require L2 padding to pad the payload |
540 | * rather then the header. This could be a requirement for | |
541 | * PCI and USB devices, while header alignment only is valid | |
542 | * for PCI devices. | |
543 | */ | |
9f166171 | 544 | if (test_bit(DRIVER_REQUIRE_L2PAD, &queue->rt2x00dev->flags)) |
daee6c09 | 545 | rt2x00queue_insert_l2pad(entry->skb, txdesc.header_length); |
93354cbb | 546 | else if (test_bit(DRIVER_REQUIRE_DMA, &queue->rt2x00dev->flags)) |
daee6c09 | 547 | rt2x00queue_align_frame(entry->skb); |
9f166171 | 548 | |
2bb057d0 ID |
549 | /* |
550 | * It could be possible that the queue was corrupted and this | |
0e3de998 ID |
551 | * call failed. Since we always return NETDEV_TX_OK to mac80211, |
552 | * this frame will simply be dropped. | |
2bb057d0 | 553 | */ |
78eea11b | 554 | if (unlikely(rt2x00queue_write_tx_data(entry, &txdesc))) { |
0262ab0d | 555 | clear_bit(ENTRY_OWNER_DEVICE_DATA, &entry->flags); |
2bb057d0 | 556 | entry->skb = NULL; |
0e3de998 | 557 | return -EIO; |
6db3786a ID |
558 | } |
559 | ||
0262ab0d | 560 | set_bit(ENTRY_DATA_PENDING, &entry->flags); |
6db3786a ID |
561 | |
562 | rt2x00queue_index_inc(queue, Q_INDEX); | |
563 | rt2x00queue_write_tx_descriptor(entry, &txdesc); | |
8be4eed0 | 564 | rt2x00queue_kick_tx_queue(queue, &txdesc); |
6db3786a ID |
565 | |
566 | return 0; | |
567 | } | |
568 | ||
bd88a781 | 569 | int rt2x00queue_update_beacon(struct rt2x00_dev *rt2x00dev, |
a2c9b652 ID |
570 | struct ieee80211_vif *vif, |
571 | const bool enable_beacon) | |
bd88a781 ID |
572 | { |
573 | struct rt2x00_intf *intf = vif_to_intf(vif); | |
574 | struct skb_frame_desc *skbdesc; | |
575 | struct txentry_desc txdesc; | |
bd88a781 ID |
576 | |
577 | if (unlikely(!intf->beacon)) | |
578 | return -ENOBUFS; | |
579 | ||
17512dc3 IP |
580 | mutex_lock(&intf->beacon_skb_mutex); |
581 | ||
582 | /* | |
583 | * Clean up the beacon skb. | |
584 | */ | |
fa69560f | 585 | rt2x00queue_free_skb(intf->beacon); |
17512dc3 | 586 | |
a2c9b652 | 587 | if (!enable_beacon) { |
dbba306f | 588 | rt2x00dev->ops->lib->stop_queue(intf->beacon->queue); |
17512dc3 | 589 | mutex_unlock(&intf->beacon_skb_mutex); |
a2c9b652 ID |
590 | return 0; |
591 | } | |
592 | ||
bd88a781 | 593 | intf->beacon->skb = ieee80211_beacon_get(rt2x00dev->hw, vif); |
17512dc3 IP |
594 | if (!intf->beacon->skb) { |
595 | mutex_unlock(&intf->beacon_skb_mutex); | |
bd88a781 | 596 | return -ENOMEM; |
17512dc3 | 597 | } |
bd88a781 ID |
598 | |
599 | /* | |
600 | * Copy all TX descriptor information into txdesc, | |
601 | * after that we are free to use the skb->cb array | |
602 | * for our information. | |
603 | */ | |
604 | rt2x00queue_create_tx_descriptor(intf->beacon, &txdesc); | |
605 | ||
bd88a781 ID |
606 | /* |
607 | * Fill in skb descriptor | |
608 | */ | |
609 | skbdesc = get_skb_frame_desc(intf->beacon->skb); | |
610 | memset(skbdesc, 0, sizeof(*skbdesc)); | |
bd88a781 ID |
611 | skbdesc->entry = intf->beacon; |
612 | ||
bd88a781 | 613 | /* |
d61cb266 | 614 | * Send beacon to hardware and enable beacon genaration.. |
bd88a781 | 615 | */ |
f224f4ef | 616 | rt2x00dev->ops->lib->write_beacon(intf->beacon, &txdesc); |
bd88a781 | 617 | |
17512dc3 IP |
618 | mutex_unlock(&intf->beacon_skb_mutex); |
619 | ||
bd88a781 ID |
620 | return 0; |
621 | } | |
622 | ||
5eb7efe8 ID |
623 | void rt2x00queue_for_each_entry(struct data_queue *queue, |
624 | enum queue_index start, | |
625 | enum queue_index end, | |
626 | void (*fn)(struct queue_entry *entry)) | |
627 | { | |
628 | unsigned long irqflags; | |
629 | unsigned int index_start; | |
630 | unsigned int index_end; | |
631 | unsigned int i; | |
632 | ||
633 | if (unlikely(start >= Q_INDEX_MAX || end >= Q_INDEX_MAX)) { | |
634 | ERROR(queue->rt2x00dev, | |
635 | "Entry requested from invalid index range (%d - %d)\n", | |
636 | start, end); | |
637 | return; | |
638 | } | |
639 | ||
640 | /* | |
641 | * Only protect the range we are going to loop over, | |
642 | * if during our loop a extra entry is set to pending | |
643 | * it should not be kicked during this run, since it | |
644 | * is part of another TX operation. | |
645 | */ | |
813f0339 | 646 | spin_lock_irqsave(&queue->index_lock, irqflags); |
5eb7efe8 ID |
647 | index_start = queue->index[start]; |
648 | index_end = queue->index[end]; | |
813f0339 | 649 | spin_unlock_irqrestore(&queue->index_lock, irqflags); |
5eb7efe8 ID |
650 | |
651 | /* | |
652 | * Start from the TX done pointer, this guarentees that we will | |
653 | * send out all frames in the correct order. | |
654 | */ | |
655 | if (index_start < index_end) { | |
656 | for (i = index_start; i < index_end; i++) | |
657 | fn(&queue->entries[i]); | |
658 | } else { | |
659 | for (i = index_start; i < queue->limit; i++) | |
660 | fn(&queue->entries[i]); | |
661 | ||
662 | for (i = 0; i < index_end; i++) | |
663 | fn(&queue->entries[i]); | |
664 | } | |
665 | } | |
666 | EXPORT_SYMBOL_GPL(rt2x00queue_for_each_entry); | |
667 | ||
181d6902 | 668 | struct data_queue *rt2x00queue_get_queue(struct rt2x00_dev *rt2x00dev, |
e58c6aca | 669 | const enum data_queue_qid queue) |
181d6902 ID |
670 | { |
671 | int atim = test_bit(DRIVER_REQUIRE_ATIM_QUEUE, &rt2x00dev->flags); | |
672 | ||
a2c9b652 ID |
673 | if (queue == QID_RX) |
674 | return rt2x00dev->rx; | |
675 | ||
61448f88 | 676 | if (queue < rt2x00dev->ops->tx_queues && rt2x00dev->tx) |
181d6902 ID |
677 | return &rt2x00dev->tx[queue]; |
678 | ||
679 | if (!rt2x00dev->bcn) | |
680 | return NULL; | |
681 | ||
e58c6aca | 682 | if (queue == QID_BEACON) |
181d6902 | 683 | return &rt2x00dev->bcn[0]; |
e58c6aca | 684 | else if (queue == QID_ATIM && atim) |
181d6902 ID |
685 | return &rt2x00dev->bcn[1]; |
686 | ||
687 | return NULL; | |
688 | } | |
689 | EXPORT_SYMBOL_GPL(rt2x00queue_get_queue); | |
690 | ||
691 | struct queue_entry *rt2x00queue_get_entry(struct data_queue *queue, | |
692 | enum queue_index index) | |
693 | { | |
694 | struct queue_entry *entry; | |
5f46c4d0 | 695 | unsigned long irqflags; |
181d6902 ID |
696 | |
697 | if (unlikely(index >= Q_INDEX_MAX)) { | |
698 | ERROR(queue->rt2x00dev, | |
699 | "Entry requested from invalid index type (%d)\n", index); | |
700 | return NULL; | |
701 | } | |
702 | ||
813f0339 | 703 | spin_lock_irqsave(&queue->index_lock, irqflags); |
181d6902 ID |
704 | |
705 | entry = &queue->entries[queue->index[index]]; | |
706 | ||
813f0339 | 707 | spin_unlock_irqrestore(&queue->index_lock, irqflags); |
181d6902 ID |
708 | |
709 | return entry; | |
710 | } | |
711 | EXPORT_SYMBOL_GPL(rt2x00queue_get_entry); | |
712 | ||
713 | void rt2x00queue_index_inc(struct data_queue *queue, enum queue_index index) | |
714 | { | |
5f46c4d0 ID |
715 | unsigned long irqflags; |
716 | ||
181d6902 ID |
717 | if (unlikely(index >= Q_INDEX_MAX)) { |
718 | ERROR(queue->rt2x00dev, | |
719 | "Index change on invalid index type (%d)\n", index); | |
720 | return; | |
721 | } | |
722 | ||
813f0339 | 723 | spin_lock_irqsave(&queue->index_lock, irqflags); |
181d6902 ID |
724 | |
725 | queue->index[index]++; | |
726 | if (queue->index[index] >= queue->limit) | |
727 | queue->index[index] = 0; | |
728 | ||
652a9dd2 ID |
729 | queue->last_action[index] = jiffies; |
730 | ||
10b6b801 ID |
731 | if (index == Q_INDEX) { |
732 | queue->length++; | |
733 | } else if (index == Q_INDEX_DONE) { | |
734 | queue->length--; | |
55887511 | 735 | queue->count++; |
10b6b801 | 736 | } |
181d6902 | 737 | |
813f0339 | 738 | spin_unlock_irqrestore(&queue->index_lock, irqflags); |
181d6902 | 739 | } |
181d6902 ID |
740 | |
741 | static void rt2x00queue_reset(struct data_queue *queue) | |
742 | { | |
5f46c4d0 | 743 | unsigned long irqflags; |
652a9dd2 | 744 | unsigned int i; |
5f46c4d0 | 745 | |
813f0339 | 746 | spin_lock_irqsave(&queue->index_lock, irqflags); |
181d6902 ID |
747 | |
748 | queue->count = 0; | |
749 | queue->length = 0; | |
652a9dd2 ID |
750 | |
751 | for (i = 0; i < Q_INDEX_MAX; i++) { | |
752 | queue->index[i] = 0; | |
753 | queue->last_action[i] = jiffies; | |
754 | } | |
181d6902 | 755 | |
813f0339 | 756 | spin_unlock_irqrestore(&queue->index_lock, irqflags); |
181d6902 ID |
757 | } |
758 | ||
a2c9b652 ID |
759 | void rt2x00queue_stop_queues(struct rt2x00_dev *rt2x00dev) |
760 | { | |
761 | struct data_queue *queue; | |
762 | ||
763 | txall_queue_for_each(rt2x00dev, queue) | |
dbba306f | 764 | rt2x00dev->ops->lib->stop_queue(queue); |
a2c9b652 ID |
765 | } |
766 | ||
798b7adb | 767 | void rt2x00queue_init_queues(struct rt2x00_dev *rt2x00dev) |
181d6902 ID |
768 | { |
769 | struct data_queue *queue; | |
770 | unsigned int i; | |
771 | ||
798b7adb | 772 | queue_for_each(rt2x00dev, queue) { |
181d6902 ID |
773 | rt2x00queue_reset(queue); |
774 | ||
9c0ab712 | 775 | for (i = 0; i < queue->limit; i++) { |
798b7adb | 776 | rt2x00dev->ops->lib->clear_entry(&queue->entries[i]); |
7e613e16 ID |
777 | if (queue->qid == QID_RX) |
778 | rt2x00queue_index_inc(queue, Q_INDEX); | |
9c0ab712 | 779 | } |
181d6902 ID |
780 | } |
781 | } | |
782 | ||
783 | static int rt2x00queue_alloc_entries(struct data_queue *queue, | |
784 | const struct data_queue_desc *qdesc) | |
785 | { | |
786 | struct queue_entry *entries; | |
787 | unsigned int entry_size; | |
788 | unsigned int i; | |
789 | ||
790 | rt2x00queue_reset(queue); | |
791 | ||
792 | queue->limit = qdesc->entry_num; | |
b869767b | 793 | queue->threshold = DIV_ROUND_UP(qdesc->entry_num, 10); |
181d6902 ID |
794 | queue->data_size = qdesc->data_size; |
795 | queue->desc_size = qdesc->desc_size; | |
796 | ||
797 | /* | |
798 | * Allocate all queue entries. | |
799 | */ | |
800 | entry_size = sizeof(*entries) + qdesc->priv_size; | |
baeb2ffa | 801 | entries = kcalloc(queue->limit, entry_size, GFP_KERNEL); |
181d6902 ID |
802 | if (!entries) |
803 | return -ENOMEM; | |
804 | ||
805 | #define QUEUE_ENTRY_PRIV_OFFSET(__base, __index, __limit, __esize, __psize) \ | |
f8bfbc31 ME |
806 | (((char *)(__base)) + ((__limit) * (__esize)) + \ |
807 | ((__index) * (__psize))) | |
181d6902 ID |
808 | |
809 | for (i = 0; i < queue->limit; i++) { | |
810 | entries[i].flags = 0; | |
811 | entries[i].queue = queue; | |
812 | entries[i].skb = NULL; | |
813 | entries[i].entry_idx = i; | |
814 | entries[i].priv_data = | |
815 | QUEUE_ENTRY_PRIV_OFFSET(entries, i, queue->limit, | |
816 | sizeof(*entries), qdesc->priv_size); | |
817 | } | |
818 | ||
819 | #undef QUEUE_ENTRY_PRIV_OFFSET | |
820 | ||
821 | queue->entries = entries; | |
822 | ||
823 | return 0; | |
824 | } | |
825 | ||
fa69560f | 826 | static void rt2x00queue_free_skbs(struct data_queue *queue) |
30caa6e3 GW |
827 | { |
828 | unsigned int i; | |
829 | ||
830 | if (!queue->entries) | |
831 | return; | |
832 | ||
833 | for (i = 0; i < queue->limit; i++) { | |
fa69560f | 834 | rt2x00queue_free_skb(&queue->entries[i]); |
30caa6e3 GW |
835 | } |
836 | } | |
837 | ||
fa69560f | 838 | static int rt2x00queue_alloc_rxskbs(struct data_queue *queue) |
30caa6e3 GW |
839 | { |
840 | unsigned int i; | |
841 | struct sk_buff *skb; | |
842 | ||
843 | for (i = 0; i < queue->limit; i++) { | |
fa69560f | 844 | skb = rt2x00queue_alloc_rxskb(&queue->entries[i]); |
30caa6e3 | 845 | if (!skb) |
61243d8e | 846 | return -ENOMEM; |
30caa6e3 GW |
847 | queue->entries[i].skb = skb; |
848 | } | |
849 | ||
850 | return 0; | |
30caa6e3 GW |
851 | } |
852 | ||
181d6902 ID |
853 | int rt2x00queue_initialize(struct rt2x00_dev *rt2x00dev) |
854 | { | |
855 | struct data_queue *queue; | |
856 | int status; | |
857 | ||
181d6902 ID |
858 | status = rt2x00queue_alloc_entries(rt2x00dev->rx, rt2x00dev->ops->rx); |
859 | if (status) | |
860 | goto exit; | |
861 | ||
862 | tx_queue_for_each(rt2x00dev, queue) { | |
863 | status = rt2x00queue_alloc_entries(queue, rt2x00dev->ops->tx); | |
864 | if (status) | |
865 | goto exit; | |
866 | } | |
867 | ||
868 | status = rt2x00queue_alloc_entries(rt2x00dev->bcn, rt2x00dev->ops->bcn); | |
869 | if (status) | |
870 | goto exit; | |
871 | ||
30caa6e3 GW |
872 | if (test_bit(DRIVER_REQUIRE_ATIM_QUEUE, &rt2x00dev->flags)) { |
873 | status = rt2x00queue_alloc_entries(&rt2x00dev->bcn[1], | |
874 | rt2x00dev->ops->atim); | |
875 | if (status) | |
876 | goto exit; | |
877 | } | |
181d6902 | 878 | |
fa69560f | 879 | status = rt2x00queue_alloc_rxskbs(rt2x00dev->rx); |
181d6902 ID |
880 | if (status) |
881 | goto exit; | |
882 | ||
883 | return 0; | |
884 | ||
885 | exit: | |
886 | ERROR(rt2x00dev, "Queue entries allocation failed.\n"); | |
887 | ||
888 | rt2x00queue_uninitialize(rt2x00dev); | |
889 | ||
890 | return status; | |
891 | } | |
892 | ||
893 | void rt2x00queue_uninitialize(struct rt2x00_dev *rt2x00dev) | |
894 | { | |
895 | struct data_queue *queue; | |
896 | ||
fa69560f | 897 | rt2x00queue_free_skbs(rt2x00dev->rx); |
30caa6e3 | 898 | |
181d6902 ID |
899 | queue_for_each(rt2x00dev, queue) { |
900 | kfree(queue->entries); | |
901 | queue->entries = NULL; | |
902 | } | |
903 | } | |
904 | ||
8f539276 ID |
905 | static void rt2x00queue_init(struct rt2x00_dev *rt2x00dev, |
906 | struct data_queue *queue, enum data_queue_qid qid) | |
907 | { | |
813f0339 | 908 | spin_lock_init(&queue->index_lock); |
8f539276 ID |
909 | |
910 | queue->rt2x00dev = rt2x00dev; | |
911 | queue->qid = qid; | |
2af0a570 | 912 | queue->txop = 0; |
8f539276 ID |
913 | queue->aifs = 2; |
914 | queue->cw_min = 5; | |
915 | queue->cw_max = 10; | |
916 | } | |
917 | ||
181d6902 ID |
918 | int rt2x00queue_allocate(struct rt2x00_dev *rt2x00dev) |
919 | { | |
920 | struct data_queue *queue; | |
921 | enum data_queue_qid qid; | |
922 | unsigned int req_atim = | |
923 | !!test_bit(DRIVER_REQUIRE_ATIM_QUEUE, &rt2x00dev->flags); | |
924 | ||
925 | /* | |
926 | * We need the following queues: | |
927 | * RX: 1 | |
61448f88 | 928 | * TX: ops->tx_queues |
181d6902 ID |
929 | * Beacon: 1 |
930 | * Atim: 1 (if required) | |
931 | */ | |
61448f88 | 932 | rt2x00dev->data_queues = 2 + rt2x00dev->ops->tx_queues + req_atim; |
181d6902 | 933 | |
baeb2ffa | 934 | queue = kcalloc(rt2x00dev->data_queues, sizeof(*queue), GFP_KERNEL); |
181d6902 ID |
935 | if (!queue) { |
936 | ERROR(rt2x00dev, "Queue allocation failed.\n"); | |
937 | return -ENOMEM; | |
938 | } | |
939 | ||
940 | /* | |
941 | * Initialize pointers | |
942 | */ | |
943 | rt2x00dev->rx = queue; | |
944 | rt2x00dev->tx = &queue[1]; | |
61448f88 | 945 | rt2x00dev->bcn = &queue[1 + rt2x00dev->ops->tx_queues]; |
181d6902 ID |
946 | |
947 | /* | |
948 | * Initialize queue parameters. | |
949 | * RX: qid = QID_RX | |
950 | * TX: qid = QID_AC_BE + index | |
951 | * TX: cw_min: 2^5 = 32. | |
952 | * TX: cw_max: 2^10 = 1024. | |
565a019a ID |
953 | * BCN: qid = QID_BEACON |
954 | * ATIM: qid = QID_ATIM | |
181d6902 | 955 | */ |
8f539276 | 956 | rt2x00queue_init(rt2x00dev, rt2x00dev->rx, QID_RX); |
181d6902 | 957 | |
8f539276 ID |
958 | qid = QID_AC_BE; |
959 | tx_queue_for_each(rt2x00dev, queue) | |
960 | rt2x00queue_init(rt2x00dev, queue, qid++); | |
181d6902 | 961 | |
565a019a | 962 | rt2x00queue_init(rt2x00dev, &rt2x00dev->bcn[0], QID_BEACON); |
181d6902 | 963 | if (req_atim) |
565a019a | 964 | rt2x00queue_init(rt2x00dev, &rt2x00dev->bcn[1], QID_ATIM); |
181d6902 ID |
965 | |
966 | return 0; | |
967 | } | |
968 | ||
969 | void rt2x00queue_free(struct rt2x00_dev *rt2x00dev) | |
970 | { | |
971 | kfree(rt2x00dev->rx); | |
972 | rt2x00dev->rx = NULL; | |
973 | rt2x00dev->tx = NULL; | |
974 | rt2x00dev->bcn = NULL; | |
975 | } |