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 void rt2x00queue_payload_align(struct sk_buff
*skb
,
152 bool l2pad
, unsigned int header_length
)
154 struct skb_frame_desc
*skbdesc
= get_skb_frame_desc(skb
);
155 unsigned int frame_length
= skb
->len
;
156 unsigned int align
= ALIGN_SIZE(skb
, header_length
);
162 if (skbdesc
->flags
& SKBDESC_L2_PADDED
) {
163 /* Remove L2 padding */
164 memmove(skb
->data
+ align
, skb
->data
, header_length
);
165 skb_pull(skb
, align
);
166 skbdesc
->flags
&= ~SKBDESC_L2_PADDED
;
169 skb_push(skb
, align
);
170 memmove(skb
->data
, skb
->data
+ align
, header_length
);
171 skbdesc
->flags
|= SKBDESC_L2_PADDED
;
174 /* Generic payload alignment to 4-byte boundary */
175 skb_push(skb
, align
);
176 memmove(skb
->data
, skb
->data
+ align
, frame_length
);
180 static void rt2x00queue_create_tx_descriptor_seq(struct queue_entry
*entry
,
181 struct txentry_desc
*txdesc
)
183 struct ieee80211_tx_info
*tx_info
= IEEE80211_SKB_CB(entry
->skb
);
184 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)entry
->skb
->data
;
185 struct rt2x00_intf
*intf
= vif_to_intf(tx_info
->control
.vif
);
186 unsigned long irqflags
;
188 if (!(tx_info
->flags
& IEEE80211_TX_CTL_ASSIGN_SEQ
) ||
189 unlikely(!tx_info
->control
.vif
))
193 * Hardware should insert sequence counter.
194 * FIXME: We insert a software sequence counter first for
195 * hardware that doesn't support hardware sequence counting.
197 * This is wrong because beacons are not getting sequence
198 * numbers assigned properly.
200 * A secondary problem exists for drivers that cannot toggle
201 * sequence counting per-frame, since those will override the
202 * sequence counter given by mac80211.
204 spin_lock_irqsave(&intf
->seqlock
, irqflags
);
206 if (test_bit(ENTRY_TXD_FIRST_FRAGMENT
, &txdesc
->flags
))
208 hdr
->seq_ctrl
&= cpu_to_le16(IEEE80211_SCTL_FRAG
);
209 hdr
->seq_ctrl
|= cpu_to_le16(intf
->seqno
);
211 spin_unlock_irqrestore(&intf
->seqlock
, irqflags
);
213 __set_bit(ENTRY_TXD_GENERATE_SEQ
, &txdesc
->flags
);
216 static void rt2x00queue_create_tx_descriptor_plcp(struct queue_entry
*entry
,
217 struct txentry_desc
*txdesc
,
218 const struct rt2x00_rate
*hwrate
)
220 struct rt2x00_dev
*rt2x00dev
= entry
->queue
->rt2x00dev
;
221 struct ieee80211_tx_info
*tx_info
= IEEE80211_SKB_CB(entry
->skb
);
222 struct ieee80211_tx_rate
*txrate
= &tx_info
->control
.rates
[0];
223 unsigned int data_length
;
224 unsigned int duration
;
225 unsigned int residual
;
227 /* Data length + CRC + Crypto overhead (IV/EIV/ICV/MIC) */
228 data_length
= entry
->skb
->len
+ 4;
229 data_length
+= rt2x00crypto_tx_overhead(rt2x00dev
, entry
->skb
);
233 * Length calculation depends on OFDM/CCK rate.
235 txdesc
->signal
= hwrate
->plcp
;
236 txdesc
->service
= 0x04;
238 if (hwrate
->flags
& DEV_RATE_OFDM
) {
239 txdesc
->length_high
= (data_length
>> 6) & 0x3f;
240 txdesc
->length_low
= data_length
& 0x3f;
243 * Convert length to microseconds.
245 residual
= GET_DURATION_RES(data_length
, hwrate
->bitrate
);
246 duration
= GET_DURATION(data_length
, hwrate
->bitrate
);
252 * Check if we need to set the Length Extension
254 if (hwrate
->bitrate
== 110 && residual
<= 30)
255 txdesc
->service
|= 0x80;
258 txdesc
->length_high
= (duration
>> 8) & 0xff;
259 txdesc
->length_low
= duration
& 0xff;
262 * When preamble is enabled we should set the
263 * preamble bit for the signal.
265 if (txrate
->flags
& IEEE80211_TX_RC_USE_SHORT_PREAMBLE
)
266 txdesc
->signal
|= 0x08;
270 static void rt2x00queue_create_tx_descriptor(struct queue_entry
*entry
,
271 struct txentry_desc
*txdesc
)
273 struct rt2x00_dev
*rt2x00dev
= entry
->queue
->rt2x00dev
;
274 struct ieee80211_tx_info
*tx_info
= IEEE80211_SKB_CB(entry
->skb
);
275 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)entry
->skb
->data
;
276 struct ieee80211_rate
*rate
=
277 ieee80211_get_tx_rate(rt2x00dev
->hw
, tx_info
);
278 const struct rt2x00_rate
*hwrate
;
280 memset(txdesc
, 0, sizeof(*txdesc
));
283 * Initialize information from queue
285 txdesc
->queue
= entry
->queue
->qid
;
286 txdesc
->cw_min
= entry
->queue
->cw_min
;
287 txdesc
->cw_max
= entry
->queue
->cw_max
;
288 txdesc
->aifs
= entry
->queue
->aifs
;
291 * Header and alignment information.
293 txdesc
->header_length
= ieee80211_get_hdrlen_from_skb(entry
->skb
);
294 txdesc
->l2pad
= ALIGN_SIZE(entry
->skb
, txdesc
->header_length
);
297 * Check whether this frame is to be acked.
299 if (!(tx_info
->flags
& IEEE80211_TX_CTL_NO_ACK
))
300 __set_bit(ENTRY_TXD_ACK
, &txdesc
->flags
);
303 * Check if this is a RTS/CTS frame
305 if (ieee80211_is_rts(hdr
->frame_control
) ||
306 ieee80211_is_cts(hdr
->frame_control
)) {
307 __set_bit(ENTRY_TXD_BURST
, &txdesc
->flags
);
308 if (ieee80211_is_rts(hdr
->frame_control
))
309 __set_bit(ENTRY_TXD_RTS_FRAME
, &txdesc
->flags
);
311 __set_bit(ENTRY_TXD_CTS_FRAME
, &txdesc
->flags
);
312 if (tx_info
->control
.rts_cts_rate_idx
>= 0)
314 ieee80211_get_rts_cts_rate(rt2x00dev
->hw
, tx_info
);
318 * Determine retry information.
320 txdesc
->retry_limit
= tx_info
->control
.rates
[0].count
- 1;
321 if (txdesc
->retry_limit
>= rt2x00dev
->long_retry
)
322 __set_bit(ENTRY_TXD_RETRY_MODE
, &txdesc
->flags
);
325 * Check if more fragments are pending
327 if (ieee80211_has_morefrags(hdr
->frame_control
) ||
328 (tx_info
->flags
& IEEE80211_TX_CTL_MORE_FRAMES
)) {
329 __set_bit(ENTRY_TXD_BURST
, &txdesc
->flags
);
330 __set_bit(ENTRY_TXD_MORE_FRAG
, &txdesc
->flags
);
334 * Beacons and probe responses require the tsf timestamp
335 * to be inserted into the frame.
337 if (ieee80211_is_beacon(hdr
->frame_control
) ||
338 ieee80211_is_probe_resp(hdr
->frame_control
))
339 __set_bit(ENTRY_TXD_REQ_TIMESTAMP
, &txdesc
->flags
);
342 * Determine with what IFS priority this frame should be send.
343 * Set ifs to IFS_SIFS when the this is not the first fragment,
344 * or this fragment came after RTS/CTS.
346 if ((tx_info
->flags
& IEEE80211_TX_CTL_FIRST_FRAGMENT
) &&
347 !test_bit(ENTRY_TXD_RTS_FRAME
, &txdesc
->flags
)) {
348 __set_bit(ENTRY_TXD_FIRST_FRAGMENT
, &txdesc
->flags
);
349 txdesc
->ifs
= IFS_BACKOFF
;
351 txdesc
->ifs
= IFS_SIFS
;
354 * Determine rate modulation.
356 hwrate
= rt2x00_get_rate(rate
->hw_value
);
357 txdesc
->rate_mode
= RATE_MODE_CCK
;
358 if (hwrate
->flags
& DEV_RATE_OFDM
)
359 txdesc
->rate_mode
= RATE_MODE_OFDM
;
362 * Apply TX descriptor handling by components
364 rt2x00crypto_create_tx_descriptor(entry
, txdesc
);
365 rt2x00ht_create_tx_descriptor(entry
, txdesc
, hwrate
);
366 rt2x00queue_create_tx_descriptor_seq(entry
, txdesc
);
367 rt2x00queue_create_tx_descriptor_plcp(entry
, txdesc
, hwrate
);
370 static void rt2x00queue_write_tx_descriptor(struct queue_entry
*entry
,
371 struct txentry_desc
*txdesc
)
373 struct data_queue
*queue
= entry
->queue
;
374 struct rt2x00_dev
*rt2x00dev
= queue
->rt2x00dev
;
376 rt2x00dev
->ops
->lib
->write_tx_desc(rt2x00dev
, entry
->skb
, txdesc
);
379 * All processing on the frame has been completed, this means
380 * it is now ready to be dumped to userspace through debugfs.
382 rt2x00debug_dump_frame(rt2x00dev
, DUMP_FRAME_TX
, entry
->skb
);
385 * Check if we need to kick the queue, there are however a few rules
386 * 1) Don't kick beacon queue
387 * 2) Don't kick unless this is the last in frame in a burst.
388 * When the burst flag is set, this frame is always followed
389 * by another frame which in some way are related to eachother.
390 * This is true for fragments, RTS or CTS-to-self frames.
391 * 3) Rule 2 can be broken when the available entries
392 * in the queue are less then a certain threshold.
394 if (entry
->queue
->qid
== QID_BEACON
)
397 if (rt2x00queue_threshold(queue
) ||
398 !test_bit(ENTRY_TXD_BURST
, &txdesc
->flags
))
399 rt2x00dev
->ops
->lib
->kick_tx_queue(rt2x00dev
, queue
->qid
);
402 int rt2x00queue_write_tx_frame(struct data_queue
*queue
, struct sk_buff
*skb
)
404 struct ieee80211_tx_info
*tx_info
;
405 struct queue_entry
*entry
= rt2x00queue_get_entry(queue
, Q_INDEX
);
406 struct txentry_desc txdesc
;
407 struct skb_frame_desc
*skbdesc
;
408 u8 rate_idx
, rate_flags
;
410 if (unlikely(rt2x00queue_full(queue
)))
413 if (test_and_set_bit(ENTRY_OWNER_DEVICE_DATA
, &entry
->flags
)) {
414 ERROR(queue
->rt2x00dev
,
415 "Arrived at non-free entry in the non-full queue %d.\n"
416 "Please file bug report to %s.\n",
417 queue
->qid
, DRV_PROJECT
);
422 * Copy all TX descriptor information into txdesc,
423 * after that we are free to use the skb->cb array
424 * for our information.
427 rt2x00queue_create_tx_descriptor(entry
, &txdesc
);
430 * All information is retrieved from the skb->cb array,
431 * now we should claim ownership of the driver part of that
432 * array, preserving the bitrate index and flags.
434 tx_info
= IEEE80211_SKB_CB(skb
);
435 rate_idx
= tx_info
->control
.rates
[0].idx
;
436 rate_flags
= tx_info
->control
.rates
[0].flags
;
437 skbdesc
= get_skb_frame_desc(skb
);
438 memset(skbdesc
, 0, sizeof(*skbdesc
));
439 skbdesc
->entry
= entry
;
440 skbdesc
->tx_rate_idx
= rate_idx
;
441 skbdesc
->tx_rate_flags
= rate_flags
;
444 * When hardware encryption is supported, and this frame
445 * is to be encrypted, we should strip the IV/EIV data from
446 * the frame so we can provide it to the driver seperately.
448 if (test_bit(ENTRY_TXD_ENCRYPT
, &txdesc
.flags
) &&
449 !test_bit(ENTRY_TXD_ENCRYPT_IV
, &txdesc
.flags
)) {
450 if (test_bit(DRIVER_REQUIRE_COPY_IV
, &queue
->rt2x00dev
->flags
))
451 rt2x00crypto_tx_copy_iv(skb
, &txdesc
);
453 rt2x00crypto_tx_remove_iv(skb
, &txdesc
);
456 if (test_bit(DRIVER_REQUIRE_L2PAD
, &queue
->rt2x00dev
->flags
))
457 rt2x00queue_payload_align(entry
->skb
, true,
458 txdesc
.header_length
);
461 * It could be possible that the queue was corrupted and this
462 * call failed. Since we always return NETDEV_TX_OK to mac80211,
463 * this frame will simply be dropped.
465 if (unlikely(queue
->rt2x00dev
->ops
->lib
->write_tx_data(entry
))) {
466 clear_bit(ENTRY_OWNER_DEVICE_DATA
, &entry
->flags
);
471 if (test_bit(DRIVER_REQUIRE_DMA
, &queue
->rt2x00dev
->flags
))
472 rt2x00queue_map_txskb(queue
->rt2x00dev
, skb
);
474 set_bit(ENTRY_DATA_PENDING
, &entry
->flags
);
476 rt2x00queue_index_inc(queue
, Q_INDEX
);
477 rt2x00queue_write_tx_descriptor(entry
, &txdesc
);
482 int rt2x00queue_update_beacon(struct rt2x00_dev
*rt2x00dev
,
483 struct ieee80211_vif
*vif
,
484 const bool enable_beacon
)
486 struct rt2x00_intf
*intf
= vif_to_intf(vif
);
487 struct skb_frame_desc
*skbdesc
;
488 struct txentry_desc txdesc
;
491 if (unlikely(!intf
->beacon
))
494 if (!enable_beacon
) {
495 rt2x00dev
->ops
->lib
->kill_tx_queue(rt2x00dev
, QID_BEACON
);
499 intf
->beacon
->skb
= ieee80211_beacon_get(rt2x00dev
->hw
, vif
);
500 if (!intf
->beacon
->skb
)
504 * Copy all TX descriptor information into txdesc,
505 * after that we are free to use the skb->cb array
506 * for our information.
508 rt2x00queue_create_tx_descriptor(intf
->beacon
, &txdesc
);
511 * For the descriptor we use a local array from where the
512 * driver can move it to the correct location required for
515 memset(desc
, 0, sizeof(desc
));
518 * Fill in skb descriptor
520 skbdesc
= get_skb_frame_desc(intf
->beacon
->skb
);
521 memset(skbdesc
, 0, sizeof(*skbdesc
));
522 skbdesc
->desc
= desc
;
523 skbdesc
->desc_len
= intf
->beacon
->queue
->desc_size
;
524 skbdesc
->entry
= intf
->beacon
;
527 * Write TX descriptor into reserved room in front of the beacon.
529 rt2x00queue_write_tx_descriptor(intf
->beacon
, &txdesc
);
532 * Send beacon to hardware.
533 * Also enable beacon generation, which might have been disabled
534 * by the driver during the config_beacon() callback function.
536 rt2x00dev
->ops
->lib
->write_beacon(intf
->beacon
);
537 rt2x00dev
->ops
->lib
->kick_tx_queue(rt2x00dev
, QID_BEACON
);
542 struct data_queue
*rt2x00queue_get_queue(struct rt2x00_dev
*rt2x00dev
,
543 const enum data_queue_qid queue
)
545 int atim
= test_bit(DRIVER_REQUIRE_ATIM_QUEUE
, &rt2x00dev
->flags
);
548 return rt2x00dev
->rx
;
550 if (queue
< rt2x00dev
->ops
->tx_queues
&& rt2x00dev
->tx
)
551 return &rt2x00dev
->tx
[queue
];
556 if (queue
== QID_BEACON
)
557 return &rt2x00dev
->bcn
[0];
558 else if (queue
== QID_ATIM
&& atim
)
559 return &rt2x00dev
->bcn
[1];
563 EXPORT_SYMBOL_GPL(rt2x00queue_get_queue
);
565 struct queue_entry
*rt2x00queue_get_entry(struct data_queue
*queue
,
566 enum queue_index index
)
568 struct queue_entry
*entry
;
569 unsigned long irqflags
;
571 if (unlikely(index
>= Q_INDEX_MAX
)) {
572 ERROR(queue
->rt2x00dev
,
573 "Entry requested from invalid index type (%d)\n", index
);
577 spin_lock_irqsave(&queue
->lock
, irqflags
);
579 entry
= &queue
->entries
[queue
->index
[index
]];
581 spin_unlock_irqrestore(&queue
->lock
, irqflags
);
585 EXPORT_SYMBOL_GPL(rt2x00queue_get_entry
);
587 void rt2x00queue_index_inc(struct data_queue
*queue
, enum queue_index index
)
589 unsigned long irqflags
;
591 if (unlikely(index
>= Q_INDEX_MAX
)) {
592 ERROR(queue
->rt2x00dev
,
593 "Index change on invalid index type (%d)\n", index
);
597 spin_lock_irqsave(&queue
->lock
, irqflags
);
599 queue
->index
[index
]++;
600 if (queue
->index
[index
] >= queue
->limit
)
601 queue
->index
[index
] = 0;
603 if (index
== Q_INDEX
) {
605 } else if (index
== Q_INDEX_DONE
) {
610 spin_unlock_irqrestore(&queue
->lock
, irqflags
);
613 static void rt2x00queue_reset(struct data_queue
*queue
)
615 unsigned long irqflags
;
617 spin_lock_irqsave(&queue
->lock
, irqflags
);
621 memset(queue
->index
, 0, sizeof(queue
->index
));
623 spin_unlock_irqrestore(&queue
->lock
, irqflags
);
626 void rt2x00queue_stop_queues(struct rt2x00_dev
*rt2x00dev
)
628 struct data_queue
*queue
;
630 txall_queue_for_each(rt2x00dev
, queue
)
631 rt2x00dev
->ops
->lib
->kill_tx_queue(rt2x00dev
, queue
->qid
);
634 void rt2x00queue_init_queues(struct rt2x00_dev
*rt2x00dev
)
636 struct data_queue
*queue
;
639 queue_for_each(rt2x00dev
, queue
) {
640 rt2x00queue_reset(queue
);
642 for (i
= 0; i
< queue
->limit
; i
++) {
643 queue
->entries
[i
].flags
= 0;
645 rt2x00dev
->ops
->lib
->clear_entry(&queue
->entries
[i
]);
650 static int rt2x00queue_alloc_entries(struct data_queue
*queue
,
651 const struct data_queue_desc
*qdesc
)
653 struct queue_entry
*entries
;
654 unsigned int entry_size
;
657 rt2x00queue_reset(queue
);
659 queue
->limit
= qdesc
->entry_num
;
660 queue
->threshold
= DIV_ROUND_UP(qdesc
->entry_num
, 10);
661 queue
->data_size
= qdesc
->data_size
;
662 queue
->desc_size
= qdesc
->desc_size
;
665 * Allocate all queue entries.
667 entry_size
= sizeof(*entries
) + qdesc
->priv_size
;
668 entries
= kzalloc(queue
->limit
* entry_size
, GFP_KERNEL
);
672 #define QUEUE_ENTRY_PRIV_OFFSET(__base, __index, __limit, __esize, __psize) \
673 ( ((char *)(__base)) + ((__limit) * (__esize)) + \
674 ((__index) * (__psize)) )
676 for (i
= 0; i
< queue
->limit
; i
++) {
677 entries
[i
].flags
= 0;
678 entries
[i
].queue
= queue
;
679 entries
[i
].skb
= NULL
;
680 entries
[i
].entry_idx
= i
;
681 entries
[i
].priv_data
=
682 QUEUE_ENTRY_PRIV_OFFSET(entries
, i
, queue
->limit
,
683 sizeof(*entries
), qdesc
->priv_size
);
686 #undef QUEUE_ENTRY_PRIV_OFFSET
688 queue
->entries
= entries
;
693 static void rt2x00queue_free_skbs(struct rt2x00_dev
*rt2x00dev
,
694 struct data_queue
*queue
)
701 for (i
= 0; i
< queue
->limit
; i
++) {
702 if (queue
->entries
[i
].skb
)
703 rt2x00queue_free_skb(rt2x00dev
, queue
->entries
[i
].skb
);
707 static int rt2x00queue_alloc_rxskbs(struct rt2x00_dev
*rt2x00dev
,
708 struct data_queue
*queue
)
713 for (i
= 0; i
< queue
->limit
; i
++) {
714 skb
= rt2x00queue_alloc_rxskb(rt2x00dev
, &queue
->entries
[i
]);
717 queue
->entries
[i
].skb
= skb
;
723 int rt2x00queue_initialize(struct rt2x00_dev
*rt2x00dev
)
725 struct data_queue
*queue
;
728 status
= rt2x00queue_alloc_entries(rt2x00dev
->rx
, rt2x00dev
->ops
->rx
);
732 tx_queue_for_each(rt2x00dev
, queue
) {
733 status
= rt2x00queue_alloc_entries(queue
, rt2x00dev
->ops
->tx
);
738 status
= rt2x00queue_alloc_entries(rt2x00dev
->bcn
, rt2x00dev
->ops
->bcn
);
742 if (test_bit(DRIVER_REQUIRE_ATIM_QUEUE
, &rt2x00dev
->flags
)) {
743 status
= rt2x00queue_alloc_entries(&rt2x00dev
->bcn
[1],
744 rt2x00dev
->ops
->atim
);
749 status
= rt2x00queue_alloc_rxskbs(rt2x00dev
, rt2x00dev
->rx
);
756 ERROR(rt2x00dev
, "Queue entries allocation failed.\n");
758 rt2x00queue_uninitialize(rt2x00dev
);
763 void rt2x00queue_uninitialize(struct rt2x00_dev
*rt2x00dev
)
765 struct data_queue
*queue
;
767 rt2x00queue_free_skbs(rt2x00dev
, rt2x00dev
->rx
);
769 queue_for_each(rt2x00dev
, queue
) {
770 kfree(queue
->entries
);
771 queue
->entries
= NULL
;
775 static void rt2x00queue_init(struct rt2x00_dev
*rt2x00dev
,
776 struct data_queue
*queue
, enum data_queue_qid qid
)
778 spin_lock_init(&queue
->lock
);
780 queue
->rt2x00dev
= rt2x00dev
;
788 int rt2x00queue_allocate(struct rt2x00_dev
*rt2x00dev
)
790 struct data_queue
*queue
;
791 enum data_queue_qid qid
;
792 unsigned int req_atim
=
793 !!test_bit(DRIVER_REQUIRE_ATIM_QUEUE
, &rt2x00dev
->flags
);
796 * We need the following queues:
800 * Atim: 1 (if required)
802 rt2x00dev
->data_queues
= 2 + rt2x00dev
->ops
->tx_queues
+ req_atim
;
804 queue
= kzalloc(rt2x00dev
->data_queues
* sizeof(*queue
), GFP_KERNEL
);
806 ERROR(rt2x00dev
, "Queue allocation failed.\n");
811 * Initialize pointers
813 rt2x00dev
->rx
= queue
;
814 rt2x00dev
->tx
= &queue
[1];
815 rt2x00dev
->bcn
= &queue
[1 + rt2x00dev
->ops
->tx_queues
];
818 * Initialize queue parameters.
820 * TX: qid = QID_AC_BE + index
821 * TX: cw_min: 2^5 = 32.
822 * TX: cw_max: 2^10 = 1024.
823 * BCN: qid = QID_BEACON
824 * ATIM: qid = QID_ATIM
826 rt2x00queue_init(rt2x00dev
, rt2x00dev
->rx
, QID_RX
);
829 tx_queue_for_each(rt2x00dev
, queue
)
830 rt2x00queue_init(rt2x00dev
, queue
, qid
++);
832 rt2x00queue_init(rt2x00dev
, &rt2x00dev
->bcn
[0], QID_BEACON
);
834 rt2x00queue_init(rt2x00dev
, &rt2x00dev
->bcn
[1], QID_ATIM
);
839 void rt2x00queue_free(struct rt2x00_dev
*rt2x00dev
)
841 kfree(rt2x00dev
->rx
);
842 rt2x00dev
->rx
= NULL
;
843 rt2x00dev
->tx
= NULL
;
844 rt2x00dev
->bcn
= NULL
;