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/slab.h>
28 #include <linux/kernel.h>
29 #include <linux/module.h>
30 #include <linux/dma-mapping.h>
33 #include "rt2x00lib.h"
35 struct sk_buff
*rt2x00queue_alloc_rxskb(struct rt2x00_dev
*rt2x00dev
,
36 struct queue_entry
*entry
)
39 struct skb_frame_desc
*skbdesc
;
40 unsigned int frame_size
;
41 unsigned int head_size
= 0;
42 unsigned int tail_size
= 0;
45 * The frame size includes descriptor size, because the
46 * hardware directly receive the frame into the skbuffer.
48 frame_size
= entry
->queue
->data_size
+ entry
->queue
->desc_size
;
51 * The payload should be aligned to a 4-byte boundary,
52 * this means we need at least 3 bytes for moving the frame
53 * into the correct offset.
58 * For IV/EIV/ICV assembly we must make sure there is
59 * at least 8 bytes bytes available in headroom for IV/EIV
60 * and 8 bytes for ICV data as tailroon.
62 if (test_bit(CONFIG_SUPPORT_HW_CRYPTO
, &rt2x00dev
->flags
)) {
70 skb
= dev_alloc_skb(frame_size
+ head_size
+ tail_size
);
75 * Make sure we not have a frame with the requested bytes
76 * available in the head and tail.
78 skb_reserve(skb
, head_size
);
79 skb_put(skb
, frame_size
);
84 skbdesc
= get_skb_frame_desc(skb
);
85 memset(skbdesc
, 0, sizeof(*skbdesc
));
86 skbdesc
->entry
= entry
;
88 if (test_bit(DRIVER_REQUIRE_DMA
, &rt2x00dev
->flags
)) {
89 skbdesc
->skb_dma
= dma_map_single(rt2x00dev
->dev
,
93 skbdesc
->flags
|= SKBDESC_DMA_MAPPED_RX
;
99 void rt2x00queue_map_txskb(struct rt2x00_dev
*rt2x00dev
, struct sk_buff
*skb
)
101 struct skb_frame_desc
*skbdesc
= get_skb_frame_desc(skb
);
104 * If device has requested headroom, we should make sure that
105 * is also mapped to the DMA so it can be used for transfering
106 * additional descriptor information to the hardware.
108 skb_push(skb
, rt2x00dev
->ops
->extra_tx_headroom
);
111 dma_map_single(rt2x00dev
->dev
, skb
->data
, skb
->len
, DMA_TO_DEVICE
);
114 * Restore data pointer to original location again.
116 skb_pull(skb
, rt2x00dev
->ops
->extra_tx_headroom
);
118 skbdesc
->flags
|= SKBDESC_DMA_MAPPED_TX
;
120 EXPORT_SYMBOL_GPL(rt2x00queue_map_txskb
);
122 void rt2x00queue_unmap_skb(struct rt2x00_dev
*rt2x00dev
, struct sk_buff
*skb
)
124 struct skb_frame_desc
*skbdesc
= get_skb_frame_desc(skb
);
126 if (skbdesc
->flags
& SKBDESC_DMA_MAPPED_RX
) {
127 dma_unmap_single(rt2x00dev
->dev
, skbdesc
->skb_dma
, skb
->len
,
129 skbdesc
->flags
&= ~SKBDESC_DMA_MAPPED_RX
;
132 if (skbdesc
->flags
& SKBDESC_DMA_MAPPED_TX
) {
134 * Add headroom to the skb length, it has been removed
135 * by the driver, but it was actually mapped to DMA.
137 dma_unmap_single(rt2x00dev
->dev
, skbdesc
->skb_dma
,
138 skb
->len
+ rt2x00dev
->ops
->extra_tx_headroom
,
140 skbdesc
->flags
&= ~SKBDESC_DMA_MAPPED_TX
;
144 void rt2x00queue_free_skb(struct rt2x00_dev
*rt2x00dev
, struct sk_buff
*skb
)
149 rt2x00queue_unmap_skb(rt2x00dev
, skb
);
150 dev_kfree_skb_any(skb
);
153 void rt2x00queue_align_frame(struct sk_buff
*skb
)
155 unsigned int frame_length
= skb
->len
;
156 unsigned int align
= ALIGN_SIZE(skb
, 0);
161 skb_push(skb
, align
);
162 memmove(skb
->data
, skb
->data
+ align
, frame_length
);
163 skb_trim(skb
, frame_length
);
166 void rt2x00queue_align_payload(struct sk_buff
*skb
, unsigned int header_length
)
168 unsigned int frame_length
= skb
->len
;
169 unsigned int align
= ALIGN_SIZE(skb
, header_length
);
174 skb_push(skb
, align
);
175 memmove(skb
->data
, skb
->data
+ align
, frame_length
);
176 skb_trim(skb
, frame_length
);
179 void rt2x00queue_insert_l2pad(struct sk_buff
*skb
, unsigned int header_length
)
181 unsigned int payload_length
= skb
->len
- header_length
;
182 unsigned int header_align
= ALIGN_SIZE(skb
, 0);
183 unsigned int payload_align
= ALIGN_SIZE(skb
, header_length
);
184 unsigned int l2pad
= payload_length
? L2PAD_SIZE(header_length
) : 0;
187 * Adjust the header alignment if the payload needs to be moved more
190 if (payload_align
> header_align
)
193 /* There is nothing to do if no alignment is needed */
197 /* Reserve the amount of space needed in front of the frame */
198 skb_push(skb
, header_align
);
203 memmove(skb
->data
, skb
->data
+ header_align
, header_length
);
205 /* Move the payload, if present and if required */
206 if (payload_length
&& payload_align
)
207 memmove(skb
->data
+ header_length
+ l2pad
,
208 skb
->data
+ header_length
+ l2pad
+ payload_align
,
211 /* Trim the skb to the correct size */
212 skb_trim(skb
, header_length
+ l2pad
+ payload_length
);
215 void rt2x00queue_remove_l2pad(struct sk_buff
*skb
, unsigned int header_length
)
217 unsigned int l2pad
= L2PAD_SIZE(header_length
);
222 memmove(skb
->data
+ l2pad
, skb
->data
, header_length
);
223 skb_pull(skb
, l2pad
);
226 static void rt2x00queue_create_tx_descriptor_seq(struct queue_entry
*entry
,
227 struct txentry_desc
*txdesc
)
229 struct ieee80211_tx_info
*tx_info
= IEEE80211_SKB_CB(entry
->skb
);
230 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)entry
->skb
->data
;
231 struct rt2x00_intf
*intf
= vif_to_intf(tx_info
->control
.vif
);
232 unsigned long irqflags
;
234 if (!(tx_info
->flags
& IEEE80211_TX_CTL_ASSIGN_SEQ
) ||
235 unlikely(!tx_info
->control
.vif
))
239 * Hardware should insert sequence counter.
240 * FIXME: We insert a software sequence counter first for
241 * hardware that doesn't support hardware sequence counting.
243 * This is wrong because beacons are not getting sequence
244 * numbers assigned properly.
246 * A secondary problem exists for drivers that cannot toggle
247 * sequence counting per-frame, since those will override the
248 * sequence counter given by mac80211.
250 spin_lock_irqsave(&intf
->seqlock
, irqflags
);
252 if (test_bit(ENTRY_TXD_FIRST_FRAGMENT
, &txdesc
->flags
))
254 hdr
->seq_ctrl
&= cpu_to_le16(IEEE80211_SCTL_FRAG
);
255 hdr
->seq_ctrl
|= cpu_to_le16(intf
->seqno
);
257 spin_unlock_irqrestore(&intf
->seqlock
, irqflags
);
259 __set_bit(ENTRY_TXD_GENERATE_SEQ
, &txdesc
->flags
);
262 static void rt2x00queue_create_tx_descriptor_plcp(struct queue_entry
*entry
,
263 struct txentry_desc
*txdesc
,
264 const struct rt2x00_rate
*hwrate
)
266 struct rt2x00_dev
*rt2x00dev
= entry
->queue
->rt2x00dev
;
267 struct ieee80211_tx_info
*tx_info
= IEEE80211_SKB_CB(entry
->skb
);
268 struct ieee80211_tx_rate
*txrate
= &tx_info
->control
.rates
[0];
269 unsigned int data_length
;
270 unsigned int duration
;
271 unsigned int residual
;
273 /* Data length + CRC + Crypto overhead (IV/EIV/ICV/MIC) */
274 data_length
= entry
->skb
->len
+ 4;
275 data_length
+= rt2x00crypto_tx_overhead(rt2x00dev
, entry
->skb
);
279 * Length calculation depends on OFDM/CCK rate.
281 txdesc
->signal
= hwrate
->plcp
;
282 txdesc
->service
= 0x04;
284 if (hwrate
->flags
& DEV_RATE_OFDM
) {
285 txdesc
->length_high
= (data_length
>> 6) & 0x3f;
286 txdesc
->length_low
= data_length
& 0x3f;
289 * Convert length to microseconds.
291 residual
= GET_DURATION_RES(data_length
, hwrate
->bitrate
);
292 duration
= GET_DURATION(data_length
, hwrate
->bitrate
);
298 * Check if we need to set the Length Extension
300 if (hwrate
->bitrate
== 110 && residual
<= 30)
301 txdesc
->service
|= 0x80;
304 txdesc
->length_high
= (duration
>> 8) & 0xff;
305 txdesc
->length_low
= duration
& 0xff;
308 * When preamble is enabled we should set the
309 * preamble bit for the signal.
311 if (txrate
->flags
& IEEE80211_TX_RC_USE_SHORT_PREAMBLE
)
312 txdesc
->signal
|= 0x08;
316 static void rt2x00queue_create_tx_descriptor(struct queue_entry
*entry
,
317 struct txentry_desc
*txdesc
)
319 struct rt2x00_dev
*rt2x00dev
= entry
->queue
->rt2x00dev
;
320 struct ieee80211_tx_info
*tx_info
= IEEE80211_SKB_CB(entry
->skb
);
321 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)entry
->skb
->data
;
322 struct ieee80211_rate
*rate
=
323 ieee80211_get_tx_rate(rt2x00dev
->hw
, tx_info
);
324 const struct rt2x00_rate
*hwrate
;
326 memset(txdesc
, 0, sizeof(*txdesc
));
329 * Initialize information from queue
331 txdesc
->queue
= entry
->queue
->qid
;
332 txdesc
->cw_min
= entry
->queue
->cw_min
;
333 txdesc
->cw_max
= entry
->queue
->cw_max
;
334 txdesc
->aifs
= entry
->queue
->aifs
;
337 * Header and frame information.
339 txdesc
->length
= entry
->skb
->len
;
340 txdesc
->header_length
= ieee80211_get_hdrlen_from_skb(entry
->skb
);
343 * Check whether this frame is to be acked.
345 if (!(tx_info
->flags
& IEEE80211_TX_CTL_NO_ACK
))
346 __set_bit(ENTRY_TXD_ACK
, &txdesc
->flags
);
349 * Check if this is a RTS/CTS frame
351 if (ieee80211_is_rts(hdr
->frame_control
) ||
352 ieee80211_is_cts(hdr
->frame_control
)) {
353 __set_bit(ENTRY_TXD_BURST
, &txdesc
->flags
);
354 if (ieee80211_is_rts(hdr
->frame_control
))
355 __set_bit(ENTRY_TXD_RTS_FRAME
, &txdesc
->flags
);
357 __set_bit(ENTRY_TXD_CTS_FRAME
, &txdesc
->flags
);
358 if (tx_info
->control
.rts_cts_rate_idx
>= 0)
360 ieee80211_get_rts_cts_rate(rt2x00dev
->hw
, tx_info
);
364 * Determine retry information.
366 txdesc
->retry_limit
= tx_info
->control
.rates
[0].count
- 1;
367 if (txdesc
->retry_limit
>= rt2x00dev
->long_retry
)
368 __set_bit(ENTRY_TXD_RETRY_MODE
, &txdesc
->flags
);
371 * Check if more fragments are pending
373 if (ieee80211_has_morefrags(hdr
->frame_control
) ||
374 (tx_info
->flags
& IEEE80211_TX_CTL_MORE_FRAMES
)) {
375 __set_bit(ENTRY_TXD_BURST
, &txdesc
->flags
);
376 __set_bit(ENTRY_TXD_MORE_FRAG
, &txdesc
->flags
);
380 * Beacons and probe responses require the tsf timestamp
381 * to be inserted into the frame, except for a frame that has been injected
382 * through a monitor interface. This latter is needed for testing a
385 if ((ieee80211_is_beacon(hdr
->frame_control
) ||
386 ieee80211_is_probe_resp(hdr
->frame_control
)) &&
387 (!(tx_info
->flags
& IEEE80211_TX_CTL_INJECTED
)))
388 __set_bit(ENTRY_TXD_REQ_TIMESTAMP
, &txdesc
->flags
);
391 * Determine with what IFS priority this frame should be send.
392 * Set ifs to IFS_SIFS when the this is not the first fragment,
393 * or this fragment came after RTS/CTS.
395 if ((tx_info
->flags
& IEEE80211_TX_CTL_FIRST_FRAGMENT
) &&
396 !test_bit(ENTRY_TXD_RTS_FRAME
, &txdesc
->flags
)) {
397 __set_bit(ENTRY_TXD_FIRST_FRAGMENT
, &txdesc
->flags
);
398 txdesc
->ifs
= IFS_BACKOFF
;
400 txdesc
->ifs
= IFS_SIFS
;
403 * Determine rate modulation.
405 hwrate
= rt2x00_get_rate(rate
->hw_value
);
406 txdesc
->rate_mode
= RATE_MODE_CCK
;
407 if (hwrate
->flags
& DEV_RATE_OFDM
)
408 txdesc
->rate_mode
= RATE_MODE_OFDM
;
411 * Apply TX descriptor handling by components
413 rt2x00crypto_create_tx_descriptor(entry
, txdesc
);
414 rt2x00ht_create_tx_descriptor(entry
, txdesc
, hwrate
);
415 rt2x00queue_create_tx_descriptor_seq(entry
, txdesc
);
416 rt2x00queue_create_tx_descriptor_plcp(entry
, txdesc
, hwrate
);
419 static void rt2x00queue_write_tx_descriptor(struct queue_entry
*entry
,
420 struct txentry_desc
*txdesc
)
422 struct data_queue
*queue
= entry
->queue
;
423 struct rt2x00_dev
*rt2x00dev
= queue
->rt2x00dev
;
425 rt2x00dev
->ops
->lib
->write_tx_desc(rt2x00dev
, entry
->skb
, txdesc
);
428 * All processing on the frame has been completed, this means
429 * it is now ready to be dumped to userspace through debugfs.
431 rt2x00debug_dump_frame(rt2x00dev
, DUMP_FRAME_TX
, entry
->skb
);
434 static void rt2x00queue_kick_tx_queue(struct queue_entry
*entry
,
435 struct txentry_desc
*txdesc
)
437 struct data_queue
*queue
= entry
->queue
;
438 struct rt2x00_dev
*rt2x00dev
= queue
->rt2x00dev
;
441 * Check if we need to kick the queue, there are however a few rules
442 * 1) 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 * 2) Rule 1 can be broken when the available entries
447 * in the queue are less then a certain threshold.
449 if (rt2x00queue_threshold(queue
) ||
450 !test_bit(ENTRY_TXD_BURST
, &txdesc
->flags
))
451 rt2x00dev
->ops
->lib
->kick_tx_queue(rt2x00dev
, queue
->qid
);
454 int rt2x00queue_write_tx_frame(struct data_queue
*queue
, struct sk_buff
*skb
,
457 struct ieee80211_tx_info
*tx_info
;
458 struct queue_entry
*entry
= rt2x00queue_get_entry(queue
, Q_INDEX
);
459 struct txentry_desc txdesc
;
460 struct skb_frame_desc
*skbdesc
;
461 u8 rate_idx
, rate_flags
;
463 if (unlikely(rt2x00queue_full(queue
)))
466 if (test_and_set_bit(ENTRY_OWNER_DEVICE_DATA
, &entry
->flags
)) {
467 ERROR(queue
->rt2x00dev
,
468 "Arrived at non-free entry in the non-full queue %d.\n"
469 "Please file bug report to %s.\n",
470 queue
->qid
, DRV_PROJECT
);
475 * Copy all TX descriptor information into txdesc,
476 * after that we are free to use the skb->cb array
477 * for our information.
480 rt2x00queue_create_tx_descriptor(entry
, &txdesc
);
483 * All information is retrieved from the skb->cb array,
484 * now we should claim ownership of the driver part of that
485 * array, preserving the bitrate index and flags.
487 tx_info
= IEEE80211_SKB_CB(skb
);
488 rate_idx
= tx_info
->control
.rates
[0].idx
;
489 rate_flags
= tx_info
->control
.rates
[0].flags
;
490 skbdesc
= get_skb_frame_desc(skb
);
491 memset(skbdesc
, 0, sizeof(*skbdesc
));
492 skbdesc
->entry
= entry
;
493 skbdesc
->tx_rate_idx
= rate_idx
;
494 skbdesc
->tx_rate_flags
= rate_flags
;
497 skbdesc
->flags
|= SKBDESC_NOT_MAC80211
;
500 * When hardware encryption is supported, and this frame
501 * is to be encrypted, we should strip the IV/EIV data from
502 * the frame so we can provide it to the driver separately.
504 if (test_bit(ENTRY_TXD_ENCRYPT
, &txdesc
.flags
) &&
505 !test_bit(ENTRY_TXD_ENCRYPT_IV
, &txdesc
.flags
)) {
506 if (test_bit(DRIVER_REQUIRE_COPY_IV
, &queue
->rt2x00dev
->flags
))
507 rt2x00crypto_tx_copy_iv(skb
, &txdesc
);
509 rt2x00crypto_tx_remove_iv(skb
, &txdesc
);
513 * When DMA allocation is required we should guarentee to the
514 * driver that the DMA is aligned to a 4-byte boundary.
515 * However some drivers require L2 padding to pad the payload
516 * rather then the header. This could be a requirement for
517 * PCI and USB devices, while header alignment only is valid
520 if (test_bit(DRIVER_REQUIRE_L2PAD
, &queue
->rt2x00dev
->flags
))
521 rt2x00queue_insert_l2pad(entry
->skb
, txdesc
.header_length
);
522 else if (test_bit(DRIVER_REQUIRE_DMA
, &queue
->rt2x00dev
->flags
))
523 rt2x00queue_align_frame(entry
->skb
);
526 * It could be possible that the queue was corrupted and this
527 * call failed. Since we always return NETDEV_TX_OK to mac80211,
528 * this frame will simply be dropped.
530 if (unlikely(queue
->rt2x00dev
->ops
->lib
->write_tx_data(entry
,
532 clear_bit(ENTRY_OWNER_DEVICE_DATA
, &entry
->flags
);
537 if (test_bit(DRIVER_REQUIRE_DMA
, &queue
->rt2x00dev
->flags
))
538 rt2x00queue_map_txskb(queue
->rt2x00dev
, skb
);
540 set_bit(ENTRY_DATA_PENDING
, &entry
->flags
);
542 rt2x00queue_index_inc(queue
, Q_INDEX
);
543 rt2x00queue_write_tx_descriptor(entry
, &txdesc
);
544 rt2x00queue_kick_tx_queue(entry
, &txdesc
);
549 int rt2x00queue_update_beacon(struct rt2x00_dev
*rt2x00dev
,
550 struct ieee80211_vif
*vif
,
551 const bool enable_beacon
)
553 struct rt2x00_intf
*intf
= vif_to_intf(vif
);
554 struct skb_frame_desc
*skbdesc
;
555 struct txentry_desc txdesc
;
557 if (unlikely(!intf
->beacon
))
560 mutex_lock(&intf
->beacon_skb_mutex
);
563 * Clean up the beacon skb.
565 rt2x00queue_free_skb(rt2x00dev
, intf
->beacon
->skb
);
566 intf
->beacon
->skb
= NULL
;
568 if (!enable_beacon
) {
569 rt2x00dev
->ops
->lib
->kill_tx_queue(rt2x00dev
, QID_BEACON
);
570 mutex_unlock(&intf
->beacon_skb_mutex
);
574 intf
->beacon
->skb
= ieee80211_beacon_get(rt2x00dev
->hw
, vif
);
575 if (!intf
->beacon
->skb
) {
576 mutex_unlock(&intf
->beacon_skb_mutex
);
581 * Copy all TX descriptor information into txdesc,
582 * after that we are free to use the skb->cb array
583 * for our information.
585 rt2x00queue_create_tx_descriptor(intf
->beacon
, &txdesc
);
588 * Fill in skb descriptor
590 skbdesc
= get_skb_frame_desc(intf
->beacon
->skb
);
591 memset(skbdesc
, 0, sizeof(*skbdesc
));
592 skbdesc
->entry
= intf
->beacon
;
595 * Send beacon to hardware and enable beacon genaration..
597 rt2x00dev
->ops
->lib
->write_beacon(intf
->beacon
, &txdesc
);
599 mutex_unlock(&intf
->beacon_skb_mutex
);
604 struct data_queue
*rt2x00queue_get_queue(struct rt2x00_dev
*rt2x00dev
,
605 const enum data_queue_qid queue
)
607 int atim
= test_bit(DRIVER_REQUIRE_ATIM_QUEUE
, &rt2x00dev
->flags
);
610 return rt2x00dev
->rx
;
612 if (queue
< rt2x00dev
->ops
->tx_queues
&& rt2x00dev
->tx
)
613 return &rt2x00dev
->tx
[queue
];
618 if (queue
== QID_BEACON
)
619 return &rt2x00dev
->bcn
[0];
620 else if (queue
== QID_ATIM
&& atim
)
621 return &rt2x00dev
->bcn
[1];
625 EXPORT_SYMBOL_GPL(rt2x00queue_get_queue
);
627 struct queue_entry
*rt2x00queue_get_entry(struct data_queue
*queue
,
628 enum queue_index index
)
630 struct queue_entry
*entry
;
631 unsigned long irqflags
;
633 if (unlikely(index
>= Q_INDEX_MAX
)) {
634 ERROR(queue
->rt2x00dev
,
635 "Entry requested from invalid index type (%d)\n", index
);
639 spin_lock_irqsave(&queue
->lock
, irqflags
);
641 entry
= &queue
->entries
[queue
->index
[index
]];
643 spin_unlock_irqrestore(&queue
->lock
, irqflags
);
647 EXPORT_SYMBOL_GPL(rt2x00queue_get_entry
);
649 void rt2x00queue_index_inc(struct data_queue
*queue
, enum queue_index index
)
651 unsigned long irqflags
;
653 if (unlikely(index
>= Q_INDEX_MAX
)) {
654 ERROR(queue
->rt2x00dev
,
655 "Index change on invalid index type (%d)\n", index
);
659 spin_lock_irqsave(&queue
->lock
, irqflags
);
661 queue
->index
[index
]++;
662 if (queue
->index
[index
] >= queue
->limit
)
663 queue
->index
[index
] = 0;
665 if (index
== Q_INDEX
) {
667 } else if (index
== Q_INDEX_DONE
) {
672 spin_unlock_irqrestore(&queue
->lock
, irqflags
);
675 static void rt2x00queue_reset(struct data_queue
*queue
)
677 unsigned long irqflags
;
679 spin_lock_irqsave(&queue
->lock
, irqflags
);
683 memset(queue
->index
, 0, sizeof(queue
->index
));
685 spin_unlock_irqrestore(&queue
->lock
, irqflags
);
688 void rt2x00queue_stop_queues(struct rt2x00_dev
*rt2x00dev
)
690 struct data_queue
*queue
;
692 txall_queue_for_each(rt2x00dev
, queue
)
693 rt2x00dev
->ops
->lib
->kill_tx_queue(rt2x00dev
, queue
->qid
);
696 void rt2x00queue_init_queues(struct rt2x00_dev
*rt2x00dev
)
698 struct data_queue
*queue
;
701 queue_for_each(rt2x00dev
, queue
) {
702 rt2x00queue_reset(queue
);
704 for (i
= 0; i
< queue
->limit
; i
++) {
705 queue
->entries
[i
].flags
= 0;
707 rt2x00dev
->ops
->lib
->clear_entry(&queue
->entries
[i
]);
712 static int rt2x00queue_alloc_entries(struct data_queue
*queue
,
713 const struct data_queue_desc
*qdesc
)
715 struct queue_entry
*entries
;
716 unsigned int entry_size
;
719 rt2x00queue_reset(queue
);
721 queue
->limit
= qdesc
->entry_num
;
722 queue
->threshold
= DIV_ROUND_UP(qdesc
->entry_num
, 10);
723 queue
->data_size
= qdesc
->data_size
;
724 queue
->desc_size
= qdesc
->desc_size
;
727 * Allocate all queue entries.
729 entry_size
= sizeof(*entries
) + qdesc
->priv_size
;
730 entries
= kzalloc(queue
->limit
* entry_size
, GFP_KERNEL
);
734 #define QUEUE_ENTRY_PRIV_OFFSET(__base, __index, __limit, __esize, __psize) \
735 ( ((char *)(__base)) + ((__limit) * (__esize)) + \
736 ((__index) * (__psize)) )
738 for (i
= 0; i
< queue
->limit
; i
++) {
739 entries
[i
].flags
= 0;
740 entries
[i
].queue
= queue
;
741 entries
[i
].skb
= NULL
;
742 entries
[i
].entry_idx
= i
;
743 entries
[i
].priv_data
=
744 QUEUE_ENTRY_PRIV_OFFSET(entries
, i
, queue
->limit
,
745 sizeof(*entries
), qdesc
->priv_size
);
748 #undef QUEUE_ENTRY_PRIV_OFFSET
750 queue
->entries
= entries
;
755 static void rt2x00queue_free_skbs(struct rt2x00_dev
*rt2x00dev
,
756 struct data_queue
*queue
)
763 for (i
= 0; i
< queue
->limit
; i
++) {
764 if (queue
->entries
[i
].skb
)
765 rt2x00queue_free_skb(rt2x00dev
, queue
->entries
[i
].skb
);
769 static int rt2x00queue_alloc_rxskbs(struct rt2x00_dev
*rt2x00dev
,
770 struct data_queue
*queue
)
775 for (i
= 0; i
< queue
->limit
; i
++) {
776 skb
= rt2x00queue_alloc_rxskb(rt2x00dev
, &queue
->entries
[i
]);
779 queue
->entries
[i
].skb
= skb
;
785 int rt2x00queue_initialize(struct rt2x00_dev
*rt2x00dev
)
787 struct data_queue
*queue
;
790 status
= rt2x00queue_alloc_entries(rt2x00dev
->rx
, rt2x00dev
->ops
->rx
);
794 tx_queue_for_each(rt2x00dev
, queue
) {
795 status
= rt2x00queue_alloc_entries(queue
, rt2x00dev
->ops
->tx
);
800 status
= rt2x00queue_alloc_entries(rt2x00dev
->bcn
, rt2x00dev
->ops
->bcn
);
804 if (test_bit(DRIVER_REQUIRE_ATIM_QUEUE
, &rt2x00dev
->flags
)) {
805 status
= rt2x00queue_alloc_entries(&rt2x00dev
->bcn
[1],
806 rt2x00dev
->ops
->atim
);
811 status
= rt2x00queue_alloc_rxskbs(rt2x00dev
, rt2x00dev
->rx
);
818 ERROR(rt2x00dev
, "Queue entries allocation failed.\n");
820 rt2x00queue_uninitialize(rt2x00dev
);
825 void rt2x00queue_uninitialize(struct rt2x00_dev
*rt2x00dev
)
827 struct data_queue
*queue
;
829 rt2x00queue_free_skbs(rt2x00dev
, rt2x00dev
->rx
);
831 queue_for_each(rt2x00dev
, queue
) {
832 kfree(queue
->entries
);
833 queue
->entries
= NULL
;
837 static void rt2x00queue_init(struct rt2x00_dev
*rt2x00dev
,
838 struct data_queue
*queue
, enum data_queue_qid qid
)
840 spin_lock_init(&queue
->lock
);
842 queue
->rt2x00dev
= rt2x00dev
;
850 int rt2x00queue_allocate(struct rt2x00_dev
*rt2x00dev
)
852 struct data_queue
*queue
;
853 enum data_queue_qid qid
;
854 unsigned int req_atim
=
855 !!test_bit(DRIVER_REQUIRE_ATIM_QUEUE
, &rt2x00dev
->flags
);
858 * We need the following queues:
862 * Atim: 1 (if required)
864 rt2x00dev
->data_queues
= 2 + rt2x00dev
->ops
->tx_queues
+ req_atim
;
866 queue
= kzalloc(rt2x00dev
->data_queues
* sizeof(*queue
), GFP_KERNEL
);
868 ERROR(rt2x00dev
, "Queue allocation failed.\n");
873 * Initialize pointers
875 rt2x00dev
->rx
= queue
;
876 rt2x00dev
->tx
= &queue
[1];
877 rt2x00dev
->bcn
= &queue
[1 + rt2x00dev
->ops
->tx_queues
];
880 * Initialize queue parameters.
882 * TX: qid = QID_AC_BE + index
883 * TX: cw_min: 2^5 = 32.
884 * TX: cw_max: 2^10 = 1024.
885 * BCN: qid = QID_BEACON
886 * ATIM: qid = QID_ATIM
888 rt2x00queue_init(rt2x00dev
, rt2x00dev
->rx
, QID_RX
);
891 tx_queue_for_each(rt2x00dev
, queue
)
892 rt2x00queue_init(rt2x00dev
, queue
, qid
++);
894 rt2x00queue_init(rt2x00dev
, &rt2x00dev
->bcn
[0], QID_BEACON
);
896 rt2x00queue_init(rt2x00dev
, &rt2x00dev
->bcn
[1], QID_ATIM
);
901 void rt2x00queue_free(struct rt2x00_dev
*rt2x00dev
)
903 kfree(rt2x00dev
->rx
);
904 rt2x00dev
->rx
= NULL
;
905 rt2x00dev
->tx
= NULL
;
906 rt2x00dev
->bcn
= NULL
;