2 Copyright (C) 2004 - 2009 rt2x00 SourceForge Project
3 <http://rt2x00.serialmonkey.com>
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 2 of the License, or
8 (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the
17 Free Software Foundation, Inc.,
18 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
23 Abstract: rt2x00 queue specific routines.
26 #include <linux/kernel.h>
27 #include <linux/module.h>
28 #include <linux/dma-mapping.h>
31 #include "rt2x00lib.h"
33 struct sk_buff
*rt2x00queue_alloc_rxskb(struct rt2x00_dev
*rt2x00dev
,
34 struct queue_entry
*entry
)
37 struct skb_frame_desc
*skbdesc
;
38 unsigned int frame_size
;
39 unsigned int head_size
= 0;
40 unsigned int tail_size
= 0;
43 * The frame size includes descriptor size, because the
44 * hardware directly receive the frame into the skbuffer.
46 frame_size
= entry
->queue
->data_size
+ entry
->queue
->desc_size
;
49 * The payload should be aligned to a 4-byte boundary,
50 * this means we need at least 3 bytes for moving the frame
51 * into the correct offset.
56 * For IV/EIV/ICV assembly we must make sure there is
57 * at least 8 bytes bytes available in headroom for IV/EIV
58 * and 8 bytes for ICV data as tailroon.
60 if (test_bit(CONFIG_SUPPORT_HW_CRYPTO
, &rt2x00dev
->flags
)) {
68 skb
= dev_alloc_skb(frame_size
+ head_size
+ tail_size
);
73 * Make sure we not have a frame with the requested bytes
74 * available in the head and tail.
76 skb_reserve(skb
, head_size
);
77 skb_put(skb
, frame_size
);
82 skbdesc
= get_skb_frame_desc(skb
);
83 memset(skbdesc
, 0, sizeof(*skbdesc
));
84 skbdesc
->entry
= entry
;
86 if (test_bit(DRIVER_REQUIRE_DMA
, &rt2x00dev
->flags
)) {
87 skbdesc
->skb_dma
= dma_map_single(rt2x00dev
->dev
,
91 skbdesc
->flags
|= SKBDESC_DMA_MAPPED_RX
;
97 void rt2x00queue_map_txskb(struct rt2x00_dev
*rt2x00dev
, struct sk_buff
*skb
)
99 struct skb_frame_desc
*skbdesc
= get_skb_frame_desc(skb
);
102 * If device has requested headroom, we should make sure that
103 * is also mapped to the DMA so it can be used for transfering
104 * additional descriptor information to the hardware.
106 skb_push(skb
, rt2x00dev
->hw
->extra_tx_headroom
);
109 dma_map_single(rt2x00dev
->dev
, skb
->data
, skb
->len
, DMA_TO_DEVICE
);
112 * Restore data pointer to original location again.
114 skb_pull(skb
, rt2x00dev
->hw
->extra_tx_headroom
);
116 skbdesc
->flags
|= SKBDESC_DMA_MAPPED_TX
;
118 EXPORT_SYMBOL_GPL(rt2x00queue_map_txskb
);
120 void rt2x00queue_unmap_skb(struct rt2x00_dev
*rt2x00dev
, struct sk_buff
*skb
)
122 struct skb_frame_desc
*skbdesc
= get_skb_frame_desc(skb
);
124 if (skbdesc
->flags
& SKBDESC_DMA_MAPPED_RX
) {
125 dma_unmap_single(rt2x00dev
->dev
, skbdesc
->skb_dma
, skb
->len
,
127 skbdesc
->flags
&= ~SKBDESC_DMA_MAPPED_RX
;
130 if (skbdesc
->flags
& SKBDESC_DMA_MAPPED_TX
) {
132 * Add headroom to the skb length, it has been removed
133 * by the driver, but it was actually mapped to DMA.
135 dma_unmap_single(rt2x00dev
->dev
, skbdesc
->skb_dma
,
136 skb
->len
+ rt2x00dev
->hw
->extra_tx_headroom
,
138 skbdesc
->flags
&= ~SKBDESC_DMA_MAPPED_TX
;
142 void rt2x00queue_free_skb(struct rt2x00_dev
*rt2x00dev
, struct sk_buff
*skb
)
147 rt2x00queue_unmap_skb(rt2x00dev
, skb
);
148 dev_kfree_skb_any(skb
);
151 static void rt2x00queue_create_tx_descriptor_seq(struct queue_entry
*entry
,
152 struct txentry_desc
*txdesc
)
154 struct ieee80211_tx_info
*tx_info
= IEEE80211_SKB_CB(entry
->skb
);
155 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)entry
->skb
->data
;
156 struct rt2x00_intf
*intf
= vif_to_intf(tx_info
->control
.vif
);
157 unsigned long irqflags
;
159 if (!(tx_info
->flags
& IEEE80211_TX_CTL_ASSIGN_SEQ
) ||
160 unlikely(!tx_info
->control
.vif
))
164 * Hardware should insert sequence counter.
165 * FIXME: We insert a software sequence counter first for
166 * hardware that doesn't support hardware sequence counting.
168 * This is wrong because beacons are not getting sequence
169 * numbers assigned properly.
171 * A secondary problem exists for drivers that cannot toggle
172 * sequence counting per-frame, since those will override the
173 * sequence counter given by mac80211.
175 spin_lock_irqsave(&intf
->seqlock
, irqflags
);
177 if (test_bit(ENTRY_TXD_FIRST_FRAGMENT
, &txdesc
->flags
))
179 hdr
->seq_ctrl
&= cpu_to_le16(IEEE80211_SCTL_FRAG
);
180 hdr
->seq_ctrl
|= cpu_to_le16(intf
->seqno
);
182 spin_unlock_irqrestore(&intf
->seqlock
, irqflags
);
184 __set_bit(ENTRY_TXD_GENERATE_SEQ
, &txdesc
->flags
);
187 static void rt2x00queue_create_tx_descriptor_plcp(struct queue_entry
*entry
,
188 struct txentry_desc
*txdesc
,
189 const struct rt2x00_rate
*hwrate
)
191 struct rt2x00_dev
*rt2x00dev
= entry
->queue
->rt2x00dev
;
192 struct ieee80211_tx_info
*tx_info
= IEEE80211_SKB_CB(entry
->skb
);
193 struct ieee80211_tx_rate
*txrate
= &tx_info
->control
.rates
[0];
194 unsigned int data_length
;
195 unsigned int duration
;
196 unsigned int residual
;
198 /* Data length + CRC + Crypto overhead (IV/EIV/ICV/MIC) */
199 data_length
= entry
->skb
->len
+ 4;
200 data_length
+= rt2x00crypto_tx_overhead(rt2x00dev
, entry
->skb
);
204 * Length calculation depends on OFDM/CCK rate.
206 txdesc
->signal
= hwrate
->plcp
;
207 txdesc
->service
= 0x04;
209 if (hwrate
->flags
& DEV_RATE_OFDM
) {
210 txdesc
->length_high
= (data_length
>> 6) & 0x3f;
211 txdesc
->length_low
= data_length
& 0x3f;
214 * Convert length to microseconds.
216 residual
= GET_DURATION_RES(data_length
, hwrate
->bitrate
);
217 duration
= GET_DURATION(data_length
, hwrate
->bitrate
);
223 * Check if we need to set the Length Extension
225 if (hwrate
->bitrate
== 110 && residual
<= 30)
226 txdesc
->service
|= 0x80;
229 txdesc
->length_high
= (duration
>> 8) & 0xff;
230 txdesc
->length_low
= duration
& 0xff;
233 * When preamble is enabled we should set the
234 * preamble bit for the signal.
236 if (txrate
->flags
& IEEE80211_TX_RC_USE_SHORT_PREAMBLE
)
237 txdesc
->signal
|= 0x08;
241 static void rt2x00queue_create_tx_descriptor(struct queue_entry
*entry
,
242 struct txentry_desc
*txdesc
)
244 struct rt2x00_dev
*rt2x00dev
= entry
->queue
->rt2x00dev
;
245 struct ieee80211_tx_info
*tx_info
= IEEE80211_SKB_CB(entry
->skb
);
246 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)entry
->skb
->data
;
247 struct ieee80211_rate
*rate
=
248 ieee80211_get_tx_rate(rt2x00dev
->hw
, tx_info
);
249 const struct rt2x00_rate
*hwrate
;
251 memset(txdesc
, 0, sizeof(*txdesc
));
254 * Initialize information from queue
256 txdesc
->queue
= entry
->queue
->qid
;
257 txdesc
->cw_min
= entry
->queue
->cw_min
;
258 txdesc
->cw_max
= entry
->queue
->cw_max
;
259 txdesc
->aifs
= entry
->queue
->aifs
;
262 * Check whether this frame is to be acked.
264 if (!(tx_info
->flags
& IEEE80211_TX_CTL_NO_ACK
))
265 __set_bit(ENTRY_TXD_ACK
, &txdesc
->flags
);
268 * Check if this is a RTS/CTS frame
270 if (ieee80211_is_rts(hdr
->frame_control
) ||
271 ieee80211_is_cts(hdr
->frame_control
)) {
272 __set_bit(ENTRY_TXD_BURST
, &txdesc
->flags
);
273 if (ieee80211_is_rts(hdr
->frame_control
))
274 __set_bit(ENTRY_TXD_RTS_FRAME
, &txdesc
->flags
);
276 __set_bit(ENTRY_TXD_CTS_FRAME
, &txdesc
->flags
);
277 if (tx_info
->control
.rts_cts_rate_idx
>= 0)
279 ieee80211_get_rts_cts_rate(rt2x00dev
->hw
, tx_info
);
283 * Determine retry information.
285 txdesc
->retry_limit
= tx_info
->control
.rates
[0].count
- 1;
286 if (txdesc
->retry_limit
>= rt2x00dev
->long_retry
)
287 __set_bit(ENTRY_TXD_RETRY_MODE
, &txdesc
->flags
);
290 * Check if more fragments are pending
292 if (ieee80211_has_morefrags(hdr
->frame_control
)) {
293 __set_bit(ENTRY_TXD_BURST
, &txdesc
->flags
);
294 __set_bit(ENTRY_TXD_MORE_FRAG
, &txdesc
->flags
);
298 * Beacons and probe responses require the tsf timestamp
299 * to be inserted into the frame.
301 if (ieee80211_is_beacon(hdr
->frame_control
) ||
302 ieee80211_is_probe_resp(hdr
->frame_control
))
303 __set_bit(ENTRY_TXD_REQ_TIMESTAMP
, &txdesc
->flags
);
306 * Determine with what IFS priority this frame should be send.
307 * Set ifs to IFS_SIFS when the this is not the first fragment,
308 * or this fragment came after RTS/CTS.
310 if ((tx_info
->flags
& IEEE80211_TX_CTL_FIRST_FRAGMENT
) &&
311 !test_bit(ENTRY_TXD_RTS_FRAME
, &txdesc
->flags
)) {
312 __set_bit(ENTRY_TXD_FIRST_FRAGMENT
, &txdesc
->flags
);
313 txdesc
->ifs
= IFS_BACKOFF
;
315 txdesc
->ifs
= IFS_SIFS
;
318 * Determine rate modulation.
320 hwrate
= rt2x00_get_rate(rate
->hw_value
);
321 txdesc
->rate_mode
= RATE_MODE_CCK
;
322 if (hwrate
->flags
& DEV_RATE_OFDM
)
323 txdesc
->rate_mode
= RATE_MODE_OFDM
;
326 * Apply TX descriptor handling by components
328 rt2x00crypto_create_tx_descriptor(entry
, txdesc
);
329 rt2x00queue_create_tx_descriptor_seq(entry
, txdesc
);
330 rt2x00queue_create_tx_descriptor_plcp(entry
, txdesc
, hwrate
);
333 static void rt2x00queue_write_tx_descriptor(struct queue_entry
*entry
,
334 struct txentry_desc
*txdesc
)
336 struct data_queue
*queue
= entry
->queue
;
337 struct rt2x00_dev
*rt2x00dev
= queue
->rt2x00dev
;
339 rt2x00dev
->ops
->lib
->write_tx_desc(rt2x00dev
, entry
->skb
, txdesc
);
342 * All processing on the frame has been completed, this means
343 * it is now ready to be dumped to userspace through debugfs.
345 rt2x00debug_dump_frame(rt2x00dev
, DUMP_FRAME_TX
, entry
->skb
);
348 * Check if we need to kick the queue, there are however a few rules
349 * 1) Don't kick beacon queue
350 * 2) Don't kick unless this is the last in frame in a burst.
351 * When the burst flag is set, this frame is always followed
352 * by another frame which in some way are related to eachother.
353 * This is true for fragments, RTS or CTS-to-self frames.
354 * 3) Rule 2 can be broken when the available entries
355 * in the queue are less then a certain threshold.
357 if (entry
->queue
->qid
== QID_BEACON
)
360 if (rt2x00queue_threshold(queue
) ||
361 !test_bit(ENTRY_TXD_BURST
, &txdesc
->flags
))
362 rt2x00dev
->ops
->lib
->kick_tx_queue(rt2x00dev
, queue
->qid
);
365 int rt2x00queue_write_tx_frame(struct data_queue
*queue
, struct sk_buff
*skb
)
367 struct ieee80211_tx_info
*tx_info
;
368 struct queue_entry
*entry
= rt2x00queue_get_entry(queue
, Q_INDEX
);
369 struct txentry_desc txdesc
;
370 struct skb_frame_desc
*skbdesc
;
371 unsigned int iv_len
= 0;
372 u8 rate_idx
, rate_flags
;
374 if (unlikely(rt2x00queue_full(queue
)))
377 if (test_and_set_bit(ENTRY_OWNER_DEVICE_DATA
, &entry
->flags
)) {
378 ERROR(queue
->rt2x00dev
,
379 "Arrived at non-free entry in the non-full queue %d.\n"
380 "Please file bug report to %s.\n",
381 queue
->qid
, DRV_PROJECT
);
386 * Copy all TX descriptor information into txdesc,
387 * after that we are free to use the skb->cb array
388 * for our information.
391 rt2x00queue_create_tx_descriptor(entry
, &txdesc
);
393 if (IEEE80211_SKB_CB(skb
)->control
.hw_key
!= NULL
)
394 iv_len
= IEEE80211_SKB_CB(skb
)->control
.hw_key
->iv_len
;
397 * All information is retrieved from the skb->cb array,
398 * now we should claim ownership of the driver part of that
399 * array, preserving the bitrate index and flags.
401 tx_info
= IEEE80211_SKB_CB(skb
);
402 rate_idx
= tx_info
->control
.rates
[0].idx
;
403 rate_flags
= tx_info
->control
.rates
[0].flags
;
404 skbdesc
= get_skb_frame_desc(skb
);
405 memset(skbdesc
, 0, sizeof(*skbdesc
));
406 skbdesc
->entry
= entry
;
407 skbdesc
->tx_rate_idx
= rate_idx
;
408 skbdesc
->tx_rate_flags
= rate_flags
;
411 * When hardware encryption is supported, and this frame
412 * is to be encrypted, we should strip the IV/EIV data from
413 * the frame so we can provide it to the driver seperately.
415 if (test_bit(ENTRY_TXD_ENCRYPT
, &txdesc
.flags
) &&
416 !test_bit(ENTRY_TXD_ENCRYPT_IV
, &txdesc
.flags
)) {
417 if (test_bit(DRIVER_REQUIRE_COPY_IV
, &queue
->rt2x00dev
->flags
))
418 rt2x00crypto_tx_copy_iv(skb
, iv_len
);
420 rt2x00crypto_tx_remove_iv(skb
, iv_len
);
424 * It could be possible that the queue was corrupted and this
425 * call failed. Since we always return NETDEV_TX_OK to mac80211,
426 * this frame will simply be dropped.
428 if (unlikely(queue
->rt2x00dev
->ops
->lib
->write_tx_data(entry
))) {
429 clear_bit(ENTRY_OWNER_DEVICE_DATA
, &entry
->flags
);
434 if (test_bit(DRIVER_REQUIRE_DMA
, &queue
->rt2x00dev
->flags
))
435 rt2x00queue_map_txskb(queue
->rt2x00dev
, skb
);
437 set_bit(ENTRY_DATA_PENDING
, &entry
->flags
);
439 rt2x00queue_index_inc(queue
, Q_INDEX
);
440 rt2x00queue_write_tx_descriptor(entry
, &txdesc
);
445 int rt2x00queue_update_beacon(struct rt2x00_dev
*rt2x00dev
,
446 struct ieee80211_vif
*vif
,
447 const bool enable_beacon
)
449 struct rt2x00_intf
*intf
= vif_to_intf(vif
);
450 struct skb_frame_desc
*skbdesc
;
451 struct txentry_desc txdesc
;
454 if (unlikely(!intf
->beacon
))
457 if (!enable_beacon
) {
458 rt2x00dev
->ops
->lib
->kill_tx_queue(rt2x00dev
, QID_BEACON
);
462 intf
->beacon
->skb
= ieee80211_beacon_get(rt2x00dev
->hw
, vif
);
463 if (!intf
->beacon
->skb
)
467 * Copy all TX descriptor information into txdesc,
468 * after that we are free to use the skb->cb array
469 * for our information.
471 rt2x00queue_create_tx_descriptor(intf
->beacon
, &txdesc
);
474 * For the descriptor we use a local array from where the
475 * driver can move it to the correct location required for
478 memset(desc
, 0, sizeof(desc
));
481 * Fill in skb descriptor
483 skbdesc
= get_skb_frame_desc(intf
->beacon
->skb
);
484 memset(skbdesc
, 0, sizeof(*skbdesc
));
485 skbdesc
->desc
= desc
;
486 skbdesc
->desc_len
= intf
->beacon
->queue
->desc_size
;
487 skbdesc
->entry
= intf
->beacon
;
490 * Write TX descriptor into reserved room in front of the beacon.
492 rt2x00queue_write_tx_descriptor(intf
->beacon
, &txdesc
);
495 * Send beacon to hardware.
496 * Also enable beacon generation, which might have been disabled
497 * by the driver during the config_beacon() callback function.
499 rt2x00dev
->ops
->lib
->write_beacon(intf
->beacon
);
500 rt2x00dev
->ops
->lib
->kick_tx_queue(rt2x00dev
, QID_BEACON
);
505 struct data_queue
*rt2x00queue_get_queue(struct rt2x00_dev
*rt2x00dev
,
506 const enum data_queue_qid queue
)
508 int atim
= test_bit(DRIVER_REQUIRE_ATIM_QUEUE
, &rt2x00dev
->flags
);
511 return rt2x00dev
->rx
;
513 if (queue
< rt2x00dev
->ops
->tx_queues
&& rt2x00dev
->tx
)
514 return &rt2x00dev
->tx
[queue
];
519 if (queue
== QID_BEACON
)
520 return &rt2x00dev
->bcn
[0];
521 else if (queue
== QID_ATIM
&& atim
)
522 return &rt2x00dev
->bcn
[1];
526 EXPORT_SYMBOL_GPL(rt2x00queue_get_queue
);
528 struct queue_entry
*rt2x00queue_get_entry(struct data_queue
*queue
,
529 enum queue_index index
)
531 struct queue_entry
*entry
;
532 unsigned long irqflags
;
534 if (unlikely(index
>= Q_INDEX_MAX
)) {
535 ERROR(queue
->rt2x00dev
,
536 "Entry requested from invalid index type (%d)\n", index
);
540 spin_lock_irqsave(&queue
->lock
, irqflags
);
542 entry
= &queue
->entries
[queue
->index
[index
]];
544 spin_unlock_irqrestore(&queue
->lock
, irqflags
);
548 EXPORT_SYMBOL_GPL(rt2x00queue_get_entry
);
550 void rt2x00queue_index_inc(struct data_queue
*queue
, enum queue_index index
)
552 unsigned long irqflags
;
554 if (unlikely(index
>= Q_INDEX_MAX
)) {
555 ERROR(queue
->rt2x00dev
,
556 "Index change on invalid index type (%d)\n", index
);
560 spin_lock_irqsave(&queue
->lock
, irqflags
);
562 queue
->index
[index
]++;
563 if (queue
->index
[index
] >= queue
->limit
)
564 queue
->index
[index
] = 0;
566 if (index
== Q_INDEX
) {
568 } else if (index
== Q_INDEX_DONE
) {
573 spin_unlock_irqrestore(&queue
->lock
, irqflags
);
576 static void rt2x00queue_reset(struct data_queue
*queue
)
578 unsigned long irqflags
;
580 spin_lock_irqsave(&queue
->lock
, irqflags
);
584 memset(queue
->index
, 0, sizeof(queue
->index
));
586 spin_unlock_irqrestore(&queue
->lock
, irqflags
);
589 void rt2x00queue_stop_queues(struct rt2x00_dev
*rt2x00dev
)
591 struct data_queue
*queue
;
593 txall_queue_for_each(rt2x00dev
, queue
)
594 rt2x00dev
->ops
->lib
->kill_tx_queue(rt2x00dev
, queue
->qid
);
597 void rt2x00queue_init_queues(struct rt2x00_dev
*rt2x00dev
)
599 struct data_queue
*queue
;
602 queue_for_each(rt2x00dev
, queue
) {
603 rt2x00queue_reset(queue
);
605 for (i
= 0; i
< queue
->limit
; i
++) {
606 queue
->entries
[i
].flags
= 0;
608 rt2x00dev
->ops
->lib
->clear_entry(&queue
->entries
[i
]);
613 static int rt2x00queue_alloc_entries(struct data_queue
*queue
,
614 const struct data_queue_desc
*qdesc
)
616 struct queue_entry
*entries
;
617 unsigned int entry_size
;
620 rt2x00queue_reset(queue
);
622 queue
->limit
= qdesc
->entry_num
;
623 queue
->threshold
= DIV_ROUND_UP(qdesc
->entry_num
, 10);
624 queue
->data_size
= qdesc
->data_size
;
625 queue
->desc_size
= qdesc
->desc_size
;
628 * Allocate all queue entries.
630 entry_size
= sizeof(*entries
) + qdesc
->priv_size
;
631 entries
= kzalloc(queue
->limit
* entry_size
, GFP_KERNEL
);
635 #define QUEUE_ENTRY_PRIV_OFFSET(__base, __index, __limit, __esize, __psize) \
636 ( ((char *)(__base)) + ((__limit) * (__esize)) + \
637 ((__index) * (__psize)) )
639 for (i
= 0; i
< queue
->limit
; i
++) {
640 entries
[i
].flags
= 0;
641 entries
[i
].queue
= queue
;
642 entries
[i
].skb
= NULL
;
643 entries
[i
].entry_idx
= i
;
644 entries
[i
].priv_data
=
645 QUEUE_ENTRY_PRIV_OFFSET(entries
, i
, queue
->limit
,
646 sizeof(*entries
), qdesc
->priv_size
);
649 #undef QUEUE_ENTRY_PRIV_OFFSET
651 queue
->entries
= entries
;
656 static void rt2x00queue_free_skbs(struct rt2x00_dev
*rt2x00dev
,
657 struct data_queue
*queue
)
664 for (i
= 0; i
< queue
->limit
; i
++) {
665 if (queue
->entries
[i
].skb
)
666 rt2x00queue_free_skb(rt2x00dev
, queue
->entries
[i
].skb
);
670 static int rt2x00queue_alloc_rxskbs(struct rt2x00_dev
*rt2x00dev
,
671 struct data_queue
*queue
)
676 for (i
= 0; i
< queue
->limit
; i
++) {
677 skb
= rt2x00queue_alloc_rxskb(rt2x00dev
, &queue
->entries
[i
]);
680 queue
->entries
[i
].skb
= skb
;
686 int rt2x00queue_initialize(struct rt2x00_dev
*rt2x00dev
)
688 struct data_queue
*queue
;
691 status
= rt2x00queue_alloc_entries(rt2x00dev
->rx
, rt2x00dev
->ops
->rx
);
695 tx_queue_for_each(rt2x00dev
, queue
) {
696 status
= rt2x00queue_alloc_entries(queue
, rt2x00dev
->ops
->tx
);
701 status
= rt2x00queue_alloc_entries(rt2x00dev
->bcn
, rt2x00dev
->ops
->bcn
);
705 if (test_bit(DRIVER_REQUIRE_ATIM_QUEUE
, &rt2x00dev
->flags
)) {
706 status
= rt2x00queue_alloc_entries(&rt2x00dev
->bcn
[1],
707 rt2x00dev
->ops
->atim
);
712 status
= rt2x00queue_alloc_rxskbs(rt2x00dev
, rt2x00dev
->rx
);
719 ERROR(rt2x00dev
, "Queue entries allocation failed.\n");
721 rt2x00queue_uninitialize(rt2x00dev
);
726 void rt2x00queue_uninitialize(struct rt2x00_dev
*rt2x00dev
)
728 struct data_queue
*queue
;
730 rt2x00queue_free_skbs(rt2x00dev
, rt2x00dev
->rx
);
732 queue_for_each(rt2x00dev
, queue
) {
733 kfree(queue
->entries
);
734 queue
->entries
= NULL
;
738 static void rt2x00queue_init(struct rt2x00_dev
*rt2x00dev
,
739 struct data_queue
*queue
, enum data_queue_qid qid
)
741 spin_lock_init(&queue
->lock
);
743 queue
->rt2x00dev
= rt2x00dev
;
751 int rt2x00queue_allocate(struct rt2x00_dev
*rt2x00dev
)
753 struct data_queue
*queue
;
754 enum data_queue_qid qid
;
755 unsigned int req_atim
=
756 !!test_bit(DRIVER_REQUIRE_ATIM_QUEUE
, &rt2x00dev
->flags
);
759 * We need the following queues:
763 * Atim: 1 (if required)
765 rt2x00dev
->data_queues
= 2 + rt2x00dev
->ops
->tx_queues
+ req_atim
;
767 queue
= kzalloc(rt2x00dev
->data_queues
* sizeof(*queue
), GFP_KERNEL
);
769 ERROR(rt2x00dev
, "Queue allocation failed.\n");
774 * Initialize pointers
776 rt2x00dev
->rx
= queue
;
777 rt2x00dev
->tx
= &queue
[1];
778 rt2x00dev
->bcn
= &queue
[1 + rt2x00dev
->ops
->tx_queues
];
781 * Initialize queue parameters.
783 * TX: qid = QID_AC_BE + index
784 * TX: cw_min: 2^5 = 32.
785 * TX: cw_max: 2^10 = 1024.
786 * BCN: qid = QID_BEACON
787 * ATIM: qid = QID_ATIM
789 rt2x00queue_init(rt2x00dev
, rt2x00dev
->rx
, QID_RX
);
792 tx_queue_for_each(rt2x00dev
, queue
)
793 rt2x00queue_init(rt2x00dev
, queue
, qid
++);
795 rt2x00queue_init(rt2x00dev
, &rt2x00dev
->bcn
[0], QID_BEACON
);
797 rt2x00queue_init(rt2x00dev
, &rt2x00dev
->bcn
[1], QID_ATIM
);
802 void rt2x00queue_free(struct rt2x00_dev
*rt2x00dev
)
804 kfree(rt2x00dev
->rx
);
805 rt2x00dev
->rx
= NULL
;
806 rt2x00dev
->tx
= NULL
;
807 rt2x00dev
->bcn
= NULL
;