2 Copyright (C) 2004 - 2009 Ivo van Doorn <IvDoorn@gmail.com>
3 Copyright (C) 2004 - 2009 Gertjan van Wingerde <gwingerde@gmail.com>
4 <http://rt2x00.serialmonkey.com>
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the
18 Free Software Foundation, Inc.,
19 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
24 Abstract: rt2x00 queue specific routines.
27 #include <linux/kernel.h>
28 #include <linux/module.h>
29 #include <linux/dma-mapping.h>
32 #include "rt2x00lib.h"
34 struct sk_buff
*rt2x00queue_alloc_rxskb(struct rt2x00_dev
*rt2x00dev
,
35 struct queue_entry
*entry
)
38 struct skb_frame_desc
*skbdesc
;
39 unsigned int frame_size
;
40 unsigned int head_size
= 0;
41 unsigned int tail_size
= 0;
44 * The frame size includes descriptor size, because the
45 * hardware directly receive the frame into the skbuffer.
47 frame_size
= entry
->queue
->data_size
+ entry
->queue
->desc_size
;
50 * The payload should be aligned to a 4-byte boundary,
51 * this means we need at least 3 bytes for moving the frame
52 * into the correct offset.
57 * For IV/EIV/ICV assembly we must make sure there is
58 * at least 8 bytes bytes available in headroom for IV/EIV
59 * and 8 bytes for ICV data as tailroon.
61 if (test_bit(CONFIG_SUPPORT_HW_CRYPTO
, &rt2x00dev
->flags
)) {
69 skb
= dev_alloc_skb(frame_size
+ head_size
+ tail_size
);
74 * Make sure we not have a frame with the requested bytes
75 * available in the head and tail.
77 skb_reserve(skb
, head_size
);
78 skb_put(skb
, frame_size
);
83 skbdesc
= get_skb_frame_desc(skb
);
84 memset(skbdesc
, 0, sizeof(*skbdesc
));
85 skbdesc
->entry
= entry
;
87 if (test_bit(DRIVER_REQUIRE_DMA
, &rt2x00dev
->flags
)) {
88 skbdesc
->skb_dma
= dma_map_single(rt2x00dev
->dev
,
92 skbdesc
->flags
|= SKBDESC_DMA_MAPPED_RX
;
98 void rt2x00queue_map_txskb(struct rt2x00_dev
*rt2x00dev
, struct sk_buff
*skb
)
100 struct skb_frame_desc
*skbdesc
= get_skb_frame_desc(skb
);
103 * If device has requested headroom, we should make sure that
104 * is also mapped to the DMA so it can be used for transfering
105 * additional descriptor information to the hardware.
107 skb_push(skb
, rt2x00dev
->hw
->extra_tx_headroom
);
110 dma_map_single(rt2x00dev
->dev
, skb
->data
, skb
->len
, DMA_TO_DEVICE
);
113 * Restore data pointer to original location again.
115 skb_pull(skb
, rt2x00dev
->hw
->extra_tx_headroom
);
117 skbdesc
->flags
|= SKBDESC_DMA_MAPPED_TX
;
119 EXPORT_SYMBOL_GPL(rt2x00queue_map_txskb
);
121 void rt2x00queue_unmap_skb(struct rt2x00_dev
*rt2x00dev
, struct sk_buff
*skb
)
123 struct skb_frame_desc
*skbdesc
= get_skb_frame_desc(skb
);
125 if (skbdesc
->flags
& SKBDESC_DMA_MAPPED_RX
) {
126 dma_unmap_single(rt2x00dev
->dev
, skbdesc
->skb_dma
, skb
->len
,
128 skbdesc
->flags
&= ~SKBDESC_DMA_MAPPED_RX
;
131 if (skbdesc
->flags
& SKBDESC_DMA_MAPPED_TX
) {
133 * Add headroom to the skb length, it has been removed
134 * by the driver, but it was actually mapped to DMA.
136 dma_unmap_single(rt2x00dev
->dev
, skbdesc
->skb_dma
,
137 skb
->len
+ rt2x00dev
->hw
->extra_tx_headroom
,
139 skbdesc
->flags
&= ~SKBDESC_DMA_MAPPED_TX
;
143 void rt2x00queue_free_skb(struct rt2x00_dev
*rt2x00dev
, struct sk_buff
*skb
)
148 rt2x00queue_unmap_skb(rt2x00dev
, skb
);
149 dev_kfree_skb_any(skb
);
152 void rt2x00queue_align_frame(struct sk_buff
*skb
)
154 unsigned int frame_length
= skb
->len
;
155 unsigned int align
= ALIGN_SIZE(skb
, 0);
160 skb_push(skb
, align
);
161 memmove(skb
->data
, skb
->data
+ align
, frame_length
);
162 skb_trim(skb
, frame_length
);
165 void rt2x00queue_align_payload(struct sk_buff
*skb
, unsigned int header_length
)
167 unsigned int frame_length
= skb
->len
;
168 unsigned int align
= ALIGN_SIZE(skb
, header_length
);
173 skb_push(skb
, align
);
174 memmove(skb
->data
, skb
->data
+ align
, frame_length
);
175 skb_trim(skb
, frame_length
);
178 void rt2x00queue_insert_l2pad(struct sk_buff
*skb
, unsigned int header_length
)
180 struct skb_frame_desc
*skbdesc
= get_skb_frame_desc(skb
);
181 unsigned int frame_length
= skb
->len
;
182 unsigned int header_align
= ALIGN_SIZE(skb
, 0);
183 unsigned int payload_align
= ALIGN_SIZE(skb
, header_length
);
184 unsigned int l2pad
= 4 - (payload_align
- header_align
);
186 if (header_align
== payload_align
) {
188 * Both header and payload must be moved the same
189 * amount of bytes to align them properly. This means
190 * we don't use the L2 padding but just move the entire
193 rt2x00queue_align_frame(skb
);
194 } else if (!payload_align
) {
196 * Simple L2 padding, only the header needs to be moved,
197 * the payload is already properly aligned.
199 skb_push(skb
, header_align
);
200 memmove(skb
->data
, skb
->data
+ header_align
, header_length
);
201 skbdesc
->flags
|= SKBDESC_L2_PADDED
;
205 * Complicated L2 padding, both header and payload need
206 * to be moved. By default we only move to the start
207 * of the buffer, so our header alignment needs to be
208 * increased if there is not enough room for the header
211 if (payload_align
> header_align
)
214 skb_push(skb
, header_align
);
215 memmove(skb
->data
, skb
->data
+ header_align
, header_length
);
216 memmove(skb
->data
+ header_length
+ l2pad
,
217 skb
->data
+ header_length
+ l2pad
+ payload_align
,
218 frame_length
- header_length
);
219 skbdesc
->flags
|= SKBDESC_L2_PADDED
;
223 void rt2x00queue_remove_l2pad(struct sk_buff
*skb
, unsigned int header_length
)
225 struct skb_frame_desc
*skbdesc
= get_skb_frame_desc(skb
);
226 unsigned int l2pad
= 4 - (header_length
& 3);
228 if (!l2pad
|| (skbdesc
->flags
& SKBDESC_L2_PADDED
))
231 memmove(skb
->data
+ l2pad
, skb
->data
, header_length
);
232 skb_pull(skb
, l2pad
);
235 static void rt2x00queue_create_tx_descriptor_seq(struct queue_entry
*entry
,
236 struct txentry_desc
*txdesc
)
238 struct ieee80211_tx_info
*tx_info
= IEEE80211_SKB_CB(entry
->skb
);
239 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)entry
->skb
->data
;
240 struct rt2x00_intf
*intf
= vif_to_intf(tx_info
->control
.vif
);
241 unsigned long irqflags
;
243 if (!(tx_info
->flags
& IEEE80211_TX_CTL_ASSIGN_SEQ
) ||
244 unlikely(!tx_info
->control
.vif
))
248 * Hardware should insert sequence counter.
249 * FIXME: We insert a software sequence counter first for
250 * hardware that doesn't support hardware sequence counting.
252 * This is wrong because beacons are not getting sequence
253 * numbers assigned properly.
255 * A secondary problem exists for drivers that cannot toggle
256 * sequence counting per-frame, since those will override the
257 * sequence counter given by mac80211.
259 spin_lock_irqsave(&intf
->seqlock
, irqflags
);
261 if (test_bit(ENTRY_TXD_FIRST_FRAGMENT
, &txdesc
->flags
))
263 hdr
->seq_ctrl
&= cpu_to_le16(IEEE80211_SCTL_FRAG
);
264 hdr
->seq_ctrl
|= cpu_to_le16(intf
->seqno
);
266 spin_unlock_irqrestore(&intf
->seqlock
, irqflags
);
268 __set_bit(ENTRY_TXD_GENERATE_SEQ
, &txdesc
->flags
);
271 static void rt2x00queue_create_tx_descriptor_plcp(struct queue_entry
*entry
,
272 struct txentry_desc
*txdesc
,
273 const struct rt2x00_rate
*hwrate
)
275 struct rt2x00_dev
*rt2x00dev
= entry
->queue
->rt2x00dev
;
276 struct ieee80211_tx_info
*tx_info
= IEEE80211_SKB_CB(entry
->skb
);
277 struct ieee80211_tx_rate
*txrate
= &tx_info
->control
.rates
[0];
278 unsigned int data_length
;
279 unsigned int duration
;
280 unsigned int residual
;
282 /* Data length + CRC + Crypto overhead (IV/EIV/ICV/MIC) */
283 data_length
= entry
->skb
->len
+ 4;
284 data_length
+= rt2x00crypto_tx_overhead(rt2x00dev
, entry
->skb
);
288 * Length calculation depends on OFDM/CCK rate.
290 txdesc
->signal
= hwrate
->plcp
;
291 txdesc
->service
= 0x04;
293 if (hwrate
->flags
& DEV_RATE_OFDM
) {
294 txdesc
->length_high
= (data_length
>> 6) & 0x3f;
295 txdesc
->length_low
= data_length
& 0x3f;
298 * Convert length to microseconds.
300 residual
= GET_DURATION_RES(data_length
, hwrate
->bitrate
);
301 duration
= GET_DURATION(data_length
, hwrate
->bitrate
);
307 * Check if we need to set the Length Extension
309 if (hwrate
->bitrate
== 110 && residual
<= 30)
310 txdesc
->service
|= 0x80;
313 txdesc
->length_high
= (duration
>> 8) & 0xff;
314 txdesc
->length_low
= duration
& 0xff;
317 * When preamble is enabled we should set the
318 * preamble bit for the signal.
320 if (txrate
->flags
& IEEE80211_TX_RC_USE_SHORT_PREAMBLE
)
321 txdesc
->signal
|= 0x08;
325 static void rt2x00queue_create_tx_descriptor(struct queue_entry
*entry
,
326 struct txentry_desc
*txdesc
)
328 struct rt2x00_dev
*rt2x00dev
= entry
->queue
->rt2x00dev
;
329 struct ieee80211_tx_info
*tx_info
= IEEE80211_SKB_CB(entry
->skb
);
330 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)entry
->skb
->data
;
331 struct ieee80211_rate
*rate
=
332 ieee80211_get_tx_rate(rt2x00dev
->hw
, tx_info
);
333 const struct rt2x00_rate
*hwrate
;
335 memset(txdesc
, 0, sizeof(*txdesc
));
338 * Initialize information from queue
340 txdesc
->queue
= entry
->queue
->qid
;
341 txdesc
->cw_min
= entry
->queue
->cw_min
;
342 txdesc
->cw_max
= entry
->queue
->cw_max
;
343 txdesc
->aifs
= entry
->queue
->aifs
;
346 * Header and alignment information.
348 txdesc
->header_length
= ieee80211_get_hdrlen_from_skb(entry
->skb
);
349 txdesc
->l2pad
= ALIGN_SIZE(entry
->skb
, txdesc
->header_length
);
352 * Check whether this frame is to be acked.
354 if (!(tx_info
->flags
& IEEE80211_TX_CTL_NO_ACK
))
355 __set_bit(ENTRY_TXD_ACK
, &txdesc
->flags
);
358 * Check if this is a RTS/CTS frame
360 if (ieee80211_is_rts(hdr
->frame_control
) ||
361 ieee80211_is_cts(hdr
->frame_control
)) {
362 __set_bit(ENTRY_TXD_BURST
, &txdesc
->flags
);
363 if (ieee80211_is_rts(hdr
->frame_control
))
364 __set_bit(ENTRY_TXD_RTS_FRAME
, &txdesc
->flags
);
366 __set_bit(ENTRY_TXD_CTS_FRAME
, &txdesc
->flags
);
367 if (tx_info
->control
.rts_cts_rate_idx
>= 0)
369 ieee80211_get_rts_cts_rate(rt2x00dev
->hw
, tx_info
);
373 * Determine retry information.
375 txdesc
->retry_limit
= tx_info
->control
.rates
[0].count
- 1;
376 if (txdesc
->retry_limit
>= rt2x00dev
->long_retry
)
377 __set_bit(ENTRY_TXD_RETRY_MODE
, &txdesc
->flags
);
380 * Check if more fragments are pending
382 if (ieee80211_has_morefrags(hdr
->frame_control
) ||
383 (tx_info
->flags
& IEEE80211_TX_CTL_MORE_FRAMES
)) {
384 __set_bit(ENTRY_TXD_BURST
, &txdesc
->flags
);
385 __set_bit(ENTRY_TXD_MORE_FRAG
, &txdesc
->flags
);
389 * Beacons and probe responses require the tsf timestamp
390 * to be inserted into the frame.
392 if (ieee80211_is_beacon(hdr
->frame_control
) ||
393 ieee80211_is_probe_resp(hdr
->frame_control
))
394 __set_bit(ENTRY_TXD_REQ_TIMESTAMP
, &txdesc
->flags
);
397 * Determine with what IFS priority this frame should be send.
398 * Set ifs to IFS_SIFS when the this is not the first fragment,
399 * or this fragment came after RTS/CTS.
401 if ((tx_info
->flags
& IEEE80211_TX_CTL_FIRST_FRAGMENT
) &&
402 !test_bit(ENTRY_TXD_RTS_FRAME
, &txdesc
->flags
)) {
403 __set_bit(ENTRY_TXD_FIRST_FRAGMENT
, &txdesc
->flags
);
404 txdesc
->ifs
= IFS_BACKOFF
;
406 txdesc
->ifs
= IFS_SIFS
;
409 * Determine rate modulation.
411 hwrate
= rt2x00_get_rate(rate
->hw_value
);
412 txdesc
->rate_mode
= RATE_MODE_CCK
;
413 if (hwrate
->flags
& DEV_RATE_OFDM
)
414 txdesc
->rate_mode
= RATE_MODE_OFDM
;
417 * Apply TX descriptor handling by components
419 rt2x00crypto_create_tx_descriptor(entry
, txdesc
);
420 rt2x00ht_create_tx_descriptor(entry
, txdesc
, hwrate
);
421 rt2x00queue_create_tx_descriptor_seq(entry
, txdesc
);
422 rt2x00queue_create_tx_descriptor_plcp(entry
, txdesc
, hwrate
);
425 static void rt2x00queue_write_tx_descriptor(struct queue_entry
*entry
,
426 struct txentry_desc
*txdesc
)
428 struct data_queue
*queue
= entry
->queue
;
429 struct rt2x00_dev
*rt2x00dev
= queue
->rt2x00dev
;
431 rt2x00dev
->ops
->lib
->write_tx_desc(rt2x00dev
, entry
->skb
, txdesc
);
434 * All processing on the frame has been completed, this means
435 * it is now ready to be dumped to userspace through debugfs.
437 rt2x00debug_dump_frame(rt2x00dev
, DUMP_FRAME_TX
, entry
->skb
);
440 * Check if we need to kick the queue, there are however a few rules
441 * 1) Don't kick beacon queue
442 * 2) Don't kick unless this is the last in frame in a burst.
443 * When the burst flag is set, this frame is always followed
444 * by another frame which in some way are related to eachother.
445 * This is true for fragments, RTS or CTS-to-self frames.
446 * 3) Rule 2 can be broken when the available entries
447 * in the queue are less then a certain threshold.
449 if (entry
->queue
->qid
== QID_BEACON
)
452 if (rt2x00queue_threshold(queue
) ||
453 !test_bit(ENTRY_TXD_BURST
, &txdesc
->flags
))
454 rt2x00dev
->ops
->lib
->kick_tx_queue(rt2x00dev
, queue
->qid
);
457 int rt2x00queue_write_tx_frame(struct data_queue
*queue
, struct sk_buff
*skb
,
460 struct ieee80211_tx_info
*tx_info
;
461 struct queue_entry
*entry
= rt2x00queue_get_entry(queue
, Q_INDEX
);
462 struct txentry_desc txdesc
;
463 struct skb_frame_desc
*skbdesc
;
464 u8 rate_idx
, rate_flags
;
466 if (unlikely(rt2x00queue_full(queue
)))
469 if (test_and_set_bit(ENTRY_OWNER_DEVICE_DATA
, &entry
->flags
)) {
470 ERROR(queue
->rt2x00dev
,
471 "Arrived at non-free entry in the non-full queue %d.\n"
472 "Please file bug report to %s.\n",
473 queue
->qid
, DRV_PROJECT
);
478 * Copy all TX descriptor information into txdesc,
479 * after that we are free to use the skb->cb array
480 * for our information.
483 rt2x00queue_create_tx_descriptor(entry
, &txdesc
);
486 * All information is retrieved from the skb->cb array,
487 * now we should claim ownership of the driver part of that
488 * array, preserving the bitrate index and flags.
490 tx_info
= IEEE80211_SKB_CB(skb
);
491 rate_idx
= tx_info
->control
.rates
[0].idx
;
492 rate_flags
= tx_info
->control
.rates
[0].flags
;
493 skbdesc
= get_skb_frame_desc(skb
);
494 memset(skbdesc
, 0, sizeof(*skbdesc
));
495 skbdesc
->entry
= entry
;
496 skbdesc
->tx_rate_idx
= rate_idx
;
497 skbdesc
->tx_rate_flags
= rate_flags
;
500 skbdesc
->flags
|= SKBDESC_NOT_MAC80211
;
503 * When hardware encryption is supported, and this frame
504 * is to be encrypted, we should strip the IV/EIV data from
505 * the frame so we can provide it to the driver seperately.
507 if (test_bit(ENTRY_TXD_ENCRYPT
, &txdesc
.flags
) &&
508 !test_bit(ENTRY_TXD_ENCRYPT_IV
, &txdesc
.flags
)) {
509 if (test_bit(DRIVER_REQUIRE_COPY_IV
, &queue
->rt2x00dev
->flags
))
510 rt2x00crypto_tx_copy_iv(skb
, &txdesc
);
512 rt2x00crypto_tx_remove_iv(skb
, &txdesc
);
516 * When DMA allocation is required we should guarentee to the
517 * driver that the DMA is aligned to a 4-byte boundary.
518 * However some drivers require L2 padding to pad the payload
519 * rather then the header. This could be a requirement for
520 * PCI and USB devices, while header alignment only is valid
523 if (test_bit(DRIVER_REQUIRE_L2PAD
, &queue
->rt2x00dev
->flags
))
524 rt2x00queue_insert_l2pad(entry
->skb
, txdesc
.header_length
);
525 else if (test_bit(DRIVER_REQUIRE_DMA
, &queue
->rt2x00dev
->flags
))
526 rt2x00queue_align_frame(entry
->skb
);
529 * It could be possible that the queue was corrupted and this
530 * call failed. Since we always return NETDEV_TX_OK to mac80211,
531 * this frame will simply be dropped.
533 if (unlikely(queue
->rt2x00dev
->ops
->lib
->write_tx_data(entry
))) {
534 clear_bit(ENTRY_OWNER_DEVICE_DATA
, &entry
->flags
);
539 if (test_bit(DRIVER_REQUIRE_DMA
, &queue
->rt2x00dev
->flags
))
540 rt2x00queue_map_txskb(queue
->rt2x00dev
, skb
);
542 set_bit(ENTRY_DATA_PENDING
, &entry
->flags
);
544 rt2x00queue_index_inc(queue
, Q_INDEX
);
545 rt2x00queue_write_tx_descriptor(entry
, &txdesc
);
550 int rt2x00queue_update_beacon(struct rt2x00_dev
*rt2x00dev
,
551 struct ieee80211_vif
*vif
,
552 const bool enable_beacon
)
554 struct rt2x00_intf
*intf
= vif_to_intf(vif
);
555 struct skb_frame_desc
*skbdesc
;
556 struct txentry_desc txdesc
;
559 if (unlikely(!intf
->beacon
))
562 mutex_lock(&intf
->beacon_skb_mutex
);
565 * Clean up the beacon skb.
567 rt2x00queue_free_skb(rt2x00dev
, intf
->beacon
->skb
);
568 intf
->beacon
->skb
= NULL
;
570 if (!enable_beacon
) {
571 rt2x00dev
->ops
->lib
->kill_tx_queue(rt2x00dev
, QID_BEACON
);
572 mutex_unlock(&intf
->beacon_skb_mutex
);
576 intf
->beacon
->skb
= ieee80211_beacon_get(rt2x00dev
->hw
, vif
);
577 if (!intf
->beacon
->skb
) {
578 mutex_unlock(&intf
->beacon_skb_mutex
);
583 * Copy all TX descriptor information into txdesc,
584 * after that we are free to use the skb->cb array
585 * for our information.
587 rt2x00queue_create_tx_descriptor(intf
->beacon
, &txdesc
);
590 * For the descriptor we use a local array from where the
591 * driver can move it to the correct location required for
594 memset(desc
, 0, sizeof(desc
));
597 * Fill in skb descriptor
599 skbdesc
= get_skb_frame_desc(intf
->beacon
->skb
);
600 memset(skbdesc
, 0, sizeof(*skbdesc
));
601 skbdesc
->desc
= desc
;
602 skbdesc
->desc_len
= intf
->beacon
->queue
->desc_size
;
603 skbdesc
->entry
= intf
->beacon
;
606 * Write TX descriptor into reserved room in front of the beacon.
608 rt2x00queue_write_tx_descriptor(intf
->beacon
, &txdesc
);
611 * Send beacon to hardware.
612 * Also enable beacon generation, which might have been disabled
613 * by the driver during the config_beacon() callback function.
615 rt2x00dev
->ops
->lib
->write_beacon(intf
->beacon
);
616 rt2x00dev
->ops
->lib
->kick_tx_queue(rt2x00dev
, QID_BEACON
);
618 mutex_unlock(&intf
->beacon_skb_mutex
);
623 struct data_queue
*rt2x00queue_get_queue(struct rt2x00_dev
*rt2x00dev
,
624 const enum data_queue_qid queue
)
626 int atim
= test_bit(DRIVER_REQUIRE_ATIM_QUEUE
, &rt2x00dev
->flags
);
629 return rt2x00dev
->rx
;
631 if (queue
< rt2x00dev
->ops
->tx_queues
&& rt2x00dev
->tx
)
632 return &rt2x00dev
->tx
[queue
];
637 if (queue
== QID_BEACON
)
638 return &rt2x00dev
->bcn
[0];
639 else if (queue
== QID_ATIM
&& atim
)
640 return &rt2x00dev
->bcn
[1];
644 EXPORT_SYMBOL_GPL(rt2x00queue_get_queue
);
646 struct queue_entry
*rt2x00queue_get_entry(struct data_queue
*queue
,
647 enum queue_index index
)
649 struct queue_entry
*entry
;
650 unsigned long irqflags
;
652 if (unlikely(index
>= Q_INDEX_MAX
)) {
653 ERROR(queue
->rt2x00dev
,
654 "Entry requested from invalid index type (%d)\n", index
);
658 spin_lock_irqsave(&queue
->lock
, irqflags
);
660 entry
= &queue
->entries
[queue
->index
[index
]];
662 spin_unlock_irqrestore(&queue
->lock
, irqflags
);
666 EXPORT_SYMBOL_GPL(rt2x00queue_get_entry
);
668 void rt2x00queue_index_inc(struct data_queue
*queue
, enum queue_index index
)
670 unsigned long irqflags
;
672 if (unlikely(index
>= Q_INDEX_MAX
)) {
673 ERROR(queue
->rt2x00dev
,
674 "Index change on invalid index type (%d)\n", index
);
678 spin_lock_irqsave(&queue
->lock
, irqflags
);
680 queue
->index
[index
]++;
681 if (queue
->index
[index
] >= queue
->limit
)
682 queue
->index
[index
] = 0;
684 if (index
== Q_INDEX
) {
686 } else if (index
== Q_INDEX_DONE
) {
691 spin_unlock_irqrestore(&queue
->lock
, irqflags
);
694 static void rt2x00queue_reset(struct data_queue
*queue
)
696 unsigned long irqflags
;
698 spin_lock_irqsave(&queue
->lock
, irqflags
);
702 memset(queue
->index
, 0, sizeof(queue
->index
));
704 spin_unlock_irqrestore(&queue
->lock
, irqflags
);
707 void rt2x00queue_stop_queues(struct rt2x00_dev
*rt2x00dev
)
709 struct data_queue
*queue
;
711 txall_queue_for_each(rt2x00dev
, queue
)
712 rt2x00dev
->ops
->lib
->kill_tx_queue(rt2x00dev
, queue
->qid
);
715 void rt2x00queue_init_queues(struct rt2x00_dev
*rt2x00dev
)
717 struct data_queue
*queue
;
720 queue_for_each(rt2x00dev
, queue
) {
721 rt2x00queue_reset(queue
);
723 for (i
= 0; i
< queue
->limit
; i
++) {
724 queue
->entries
[i
].flags
= 0;
726 rt2x00dev
->ops
->lib
->clear_entry(&queue
->entries
[i
]);
731 static int rt2x00queue_alloc_entries(struct data_queue
*queue
,
732 const struct data_queue_desc
*qdesc
)
734 struct queue_entry
*entries
;
735 unsigned int entry_size
;
738 rt2x00queue_reset(queue
);
740 queue
->limit
= qdesc
->entry_num
;
741 queue
->threshold
= DIV_ROUND_UP(qdesc
->entry_num
, 10);
742 queue
->data_size
= qdesc
->data_size
;
743 queue
->desc_size
= qdesc
->desc_size
;
746 * Allocate all queue entries.
748 entry_size
= sizeof(*entries
) + qdesc
->priv_size
;
749 entries
= kzalloc(queue
->limit
* entry_size
, GFP_KERNEL
);
753 #define QUEUE_ENTRY_PRIV_OFFSET(__base, __index, __limit, __esize, __psize) \
754 ( ((char *)(__base)) + ((__limit) * (__esize)) + \
755 ((__index) * (__psize)) )
757 for (i
= 0; i
< queue
->limit
; i
++) {
758 entries
[i
].flags
= 0;
759 entries
[i
].queue
= queue
;
760 entries
[i
].skb
= NULL
;
761 entries
[i
].entry_idx
= i
;
762 entries
[i
].priv_data
=
763 QUEUE_ENTRY_PRIV_OFFSET(entries
, i
, queue
->limit
,
764 sizeof(*entries
), qdesc
->priv_size
);
767 #undef QUEUE_ENTRY_PRIV_OFFSET
769 queue
->entries
= entries
;
774 static void rt2x00queue_free_skbs(struct rt2x00_dev
*rt2x00dev
,
775 struct data_queue
*queue
)
782 for (i
= 0; i
< queue
->limit
; i
++) {
783 if (queue
->entries
[i
].skb
)
784 rt2x00queue_free_skb(rt2x00dev
, queue
->entries
[i
].skb
);
788 static int rt2x00queue_alloc_rxskbs(struct rt2x00_dev
*rt2x00dev
,
789 struct data_queue
*queue
)
794 for (i
= 0; i
< queue
->limit
; i
++) {
795 skb
= rt2x00queue_alloc_rxskb(rt2x00dev
, &queue
->entries
[i
]);
798 queue
->entries
[i
].skb
= skb
;
804 int rt2x00queue_initialize(struct rt2x00_dev
*rt2x00dev
)
806 struct data_queue
*queue
;
809 status
= rt2x00queue_alloc_entries(rt2x00dev
->rx
, rt2x00dev
->ops
->rx
);
813 tx_queue_for_each(rt2x00dev
, queue
) {
814 status
= rt2x00queue_alloc_entries(queue
, rt2x00dev
->ops
->tx
);
819 status
= rt2x00queue_alloc_entries(rt2x00dev
->bcn
, rt2x00dev
->ops
->bcn
);
823 if (test_bit(DRIVER_REQUIRE_ATIM_QUEUE
, &rt2x00dev
->flags
)) {
824 status
= rt2x00queue_alloc_entries(&rt2x00dev
->bcn
[1],
825 rt2x00dev
->ops
->atim
);
830 status
= rt2x00queue_alloc_rxskbs(rt2x00dev
, rt2x00dev
->rx
);
837 ERROR(rt2x00dev
, "Queue entries allocation failed.\n");
839 rt2x00queue_uninitialize(rt2x00dev
);
844 void rt2x00queue_uninitialize(struct rt2x00_dev
*rt2x00dev
)
846 struct data_queue
*queue
;
848 rt2x00queue_free_skbs(rt2x00dev
, rt2x00dev
->rx
);
850 queue_for_each(rt2x00dev
, queue
) {
851 kfree(queue
->entries
);
852 queue
->entries
= NULL
;
856 static void rt2x00queue_init(struct rt2x00_dev
*rt2x00dev
,
857 struct data_queue
*queue
, enum data_queue_qid qid
)
859 spin_lock_init(&queue
->lock
);
861 queue
->rt2x00dev
= rt2x00dev
;
869 int rt2x00queue_allocate(struct rt2x00_dev
*rt2x00dev
)
871 struct data_queue
*queue
;
872 enum data_queue_qid qid
;
873 unsigned int req_atim
=
874 !!test_bit(DRIVER_REQUIRE_ATIM_QUEUE
, &rt2x00dev
->flags
);
877 * We need the following queues:
881 * Atim: 1 (if required)
883 rt2x00dev
->data_queues
= 2 + rt2x00dev
->ops
->tx_queues
+ req_atim
;
885 queue
= kzalloc(rt2x00dev
->data_queues
* sizeof(*queue
), GFP_KERNEL
);
887 ERROR(rt2x00dev
, "Queue allocation failed.\n");
892 * Initialize pointers
894 rt2x00dev
->rx
= queue
;
895 rt2x00dev
->tx
= &queue
[1];
896 rt2x00dev
->bcn
= &queue
[1 + rt2x00dev
->ops
->tx_queues
];
899 * Initialize queue parameters.
901 * TX: qid = QID_AC_BE + index
902 * TX: cw_min: 2^5 = 32.
903 * TX: cw_max: 2^10 = 1024.
904 * BCN: qid = QID_BEACON
905 * ATIM: qid = QID_ATIM
907 rt2x00queue_init(rt2x00dev
, rt2x00dev
->rx
, QID_RX
);
910 tx_queue_for_each(rt2x00dev
, queue
)
911 rt2x00queue_init(rt2x00dev
, queue
, qid
++);
913 rt2x00queue_init(rt2x00dev
, &rt2x00dev
->bcn
[0], QID_BEACON
);
915 rt2x00queue_init(rt2x00dev
, &rt2x00dev
->bcn
[1], QID_ATIM
);
920 void rt2x00queue_free(struct rt2x00_dev
*rt2x00dev
)
922 kfree(rt2x00dev
->rx
);
923 rt2x00dev
->rx
= NULL
;
924 rt2x00dev
->tx
= NULL
;
925 rt2x00dev
->bcn
= NULL
;