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
->ops
->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
->ops
->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
->ops
->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 unsigned int payload_length
= skb
->len
- header_length
;
181 unsigned int header_align
= ALIGN_SIZE(skb
, 0);
182 unsigned int payload_align
= ALIGN_SIZE(skb
, header_length
);
183 unsigned int l2pad
= payload_length
? L2PAD_SIZE(header_length
) : 0;
186 * Adjust the header alignment if the payload needs to be moved more
189 if (payload_align
> header_align
)
192 /* There is nothing to do if no alignment is needed */
196 /* Reserve the amount of space needed in front of the frame */
197 skb_push(skb
, header_align
);
202 memmove(skb
->data
, skb
->data
+ header_align
, header_length
);
204 /* Move the payload, if present and if required */
205 if (payload_length
&& payload_align
)
206 memmove(skb
->data
+ header_length
+ l2pad
,
207 skb
->data
+ header_length
+ l2pad
+ payload_align
,
210 /* Trim the skb to the correct size */
211 skb_trim(skb
, header_length
+ l2pad
+ payload_length
);
214 void rt2x00queue_remove_l2pad(struct sk_buff
*skb
, unsigned int header_length
)
216 unsigned int l2pad
= L2PAD_SIZE(header_length
);
221 memmove(skb
->data
+ l2pad
, skb
->data
, header_length
);
222 skb_pull(skb
, l2pad
);
225 static void rt2x00queue_create_tx_descriptor_seq(struct queue_entry
*entry
,
226 struct txentry_desc
*txdesc
)
228 struct ieee80211_tx_info
*tx_info
= IEEE80211_SKB_CB(entry
->skb
);
229 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)entry
->skb
->data
;
230 struct rt2x00_intf
*intf
= vif_to_intf(tx_info
->control
.vif
);
231 unsigned long irqflags
;
233 if (!(tx_info
->flags
& IEEE80211_TX_CTL_ASSIGN_SEQ
) ||
234 unlikely(!tx_info
->control
.vif
))
238 * Hardware should insert sequence counter.
239 * FIXME: We insert a software sequence counter first for
240 * hardware that doesn't support hardware sequence counting.
242 * This is wrong because beacons are not getting sequence
243 * numbers assigned properly.
245 * A secondary problem exists for drivers that cannot toggle
246 * sequence counting per-frame, since those will override the
247 * sequence counter given by mac80211.
249 spin_lock_irqsave(&intf
->seqlock
, irqflags
);
251 if (test_bit(ENTRY_TXD_FIRST_FRAGMENT
, &txdesc
->flags
))
253 hdr
->seq_ctrl
&= cpu_to_le16(IEEE80211_SCTL_FRAG
);
254 hdr
->seq_ctrl
|= cpu_to_le16(intf
->seqno
);
256 spin_unlock_irqrestore(&intf
->seqlock
, irqflags
);
258 __set_bit(ENTRY_TXD_GENERATE_SEQ
, &txdesc
->flags
);
261 static void rt2x00queue_create_tx_descriptor_plcp(struct queue_entry
*entry
,
262 struct txentry_desc
*txdesc
,
263 const struct rt2x00_rate
*hwrate
)
265 struct rt2x00_dev
*rt2x00dev
= entry
->queue
->rt2x00dev
;
266 struct ieee80211_tx_info
*tx_info
= IEEE80211_SKB_CB(entry
->skb
);
267 struct ieee80211_tx_rate
*txrate
= &tx_info
->control
.rates
[0];
268 unsigned int data_length
;
269 unsigned int duration
;
270 unsigned int residual
;
272 /* Data length + CRC + Crypto overhead (IV/EIV/ICV/MIC) */
273 data_length
= entry
->skb
->len
+ 4;
274 data_length
+= rt2x00crypto_tx_overhead(rt2x00dev
, entry
->skb
);
278 * Length calculation depends on OFDM/CCK rate.
280 txdesc
->signal
= hwrate
->plcp
;
281 txdesc
->service
= 0x04;
283 if (hwrate
->flags
& DEV_RATE_OFDM
) {
284 txdesc
->length_high
= (data_length
>> 6) & 0x3f;
285 txdesc
->length_low
= data_length
& 0x3f;
288 * Convert length to microseconds.
290 residual
= GET_DURATION_RES(data_length
, hwrate
->bitrate
);
291 duration
= GET_DURATION(data_length
, hwrate
->bitrate
);
297 * Check if we need to set the Length Extension
299 if (hwrate
->bitrate
== 110 && residual
<= 30)
300 txdesc
->service
|= 0x80;
303 txdesc
->length_high
= (duration
>> 8) & 0xff;
304 txdesc
->length_low
= duration
& 0xff;
307 * When preamble is enabled we should set the
308 * preamble bit for the signal.
310 if (txrate
->flags
& IEEE80211_TX_RC_USE_SHORT_PREAMBLE
)
311 txdesc
->signal
|= 0x08;
315 static void rt2x00queue_create_tx_descriptor(struct queue_entry
*entry
,
316 struct txentry_desc
*txdesc
)
318 struct rt2x00_dev
*rt2x00dev
= entry
->queue
->rt2x00dev
;
319 struct ieee80211_tx_info
*tx_info
= IEEE80211_SKB_CB(entry
->skb
);
320 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)entry
->skb
->data
;
321 struct ieee80211_rate
*rate
=
322 ieee80211_get_tx_rate(rt2x00dev
->hw
, tx_info
);
323 const struct rt2x00_rate
*hwrate
;
325 memset(txdesc
, 0, sizeof(*txdesc
));
328 * Initialize information from queue
330 txdesc
->queue
= entry
->queue
->qid
;
331 txdesc
->cw_min
= entry
->queue
->cw_min
;
332 txdesc
->cw_max
= entry
->queue
->cw_max
;
333 txdesc
->aifs
= entry
->queue
->aifs
;
336 * Header and frame information.
338 txdesc
->length
= entry
->skb
->len
;
339 txdesc
->header_length
= ieee80211_get_hdrlen_from_skb(entry
->skb
);
342 * Check whether this frame is to be acked.
344 if (!(tx_info
->flags
& IEEE80211_TX_CTL_NO_ACK
))
345 __set_bit(ENTRY_TXD_ACK
, &txdesc
->flags
);
348 * Check if this is a RTS/CTS frame
350 if (ieee80211_is_rts(hdr
->frame_control
) ||
351 ieee80211_is_cts(hdr
->frame_control
)) {
352 __set_bit(ENTRY_TXD_BURST
, &txdesc
->flags
);
353 if (ieee80211_is_rts(hdr
->frame_control
))
354 __set_bit(ENTRY_TXD_RTS_FRAME
, &txdesc
->flags
);
356 __set_bit(ENTRY_TXD_CTS_FRAME
, &txdesc
->flags
);
357 if (tx_info
->control
.rts_cts_rate_idx
>= 0)
359 ieee80211_get_rts_cts_rate(rt2x00dev
->hw
, tx_info
);
363 * Determine retry information.
365 txdesc
->retry_limit
= tx_info
->control
.rates
[0].count
- 1;
366 if (txdesc
->retry_limit
>= rt2x00dev
->long_retry
)
367 __set_bit(ENTRY_TXD_RETRY_MODE
, &txdesc
->flags
);
370 * Check if more fragments are pending
372 if (ieee80211_has_morefrags(hdr
->frame_control
) ||
373 (tx_info
->flags
& IEEE80211_TX_CTL_MORE_FRAMES
)) {
374 __set_bit(ENTRY_TXD_BURST
, &txdesc
->flags
);
375 __set_bit(ENTRY_TXD_MORE_FRAG
, &txdesc
->flags
);
379 * Beacons and probe responses require the tsf timestamp
380 * to be inserted into the frame, except for a frame that has been injected
381 * through a monitor interface. This latter is needed for testing a
384 if ((ieee80211_is_beacon(hdr
->frame_control
) ||
385 ieee80211_is_probe_resp(hdr
->frame_control
)) &&
386 (!(tx_info
->flags
& IEEE80211_TX_CTL_INJECTED
)))
387 __set_bit(ENTRY_TXD_REQ_TIMESTAMP
, &txdesc
->flags
);
390 * Determine with what IFS priority this frame should be send.
391 * Set ifs to IFS_SIFS when the this is not the first fragment,
392 * or this fragment came after RTS/CTS.
394 if ((tx_info
->flags
& IEEE80211_TX_CTL_FIRST_FRAGMENT
) &&
395 !test_bit(ENTRY_TXD_RTS_FRAME
, &txdesc
->flags
)) {
396 __set_bit(ENTRY_TXD_FIRST_FRAGMENT
, &txdesc
->flags
);
397 txdesc
->ifs
= IFS_BACKOFF
;
399 txdesc
->ifs
= IFS_SIFS
;
402 * Determine rate modulation.
404 hwrate
= rt2x00_get_rate(rate
->hw_value
);
405 txdesc
->rate_mode
= RATE_MODE_CCK
;
406 if (hwrate
->flags
& DEV_RATE_OFDM
)
407 txdesc
->rate_mode
= RATE_MODE_OFDM
;
410 * Apply TX descriptor handling by components
412 rt2x00crypto_create_tx_descriptor(entry
, txdesc
);
413 rt2x00ht_create_tx_descriptor(entry
, txdesc
, hwrate
);
414 rt2x00queue_create_tx_descriptor_seq(entry
, txdesc
);
415 rt2x00queue_create_tx_descriptor_plcp(entry
, txdesc
, hwrate
);
418 static void rt2x00queue_write_tx_descriptor(struct queue_entry
*entry
,
419 struct txentry_desc
*txdesc
)
421 struct data_queue
*queue
= entry
->queue
;
422 struct rt2x00_dev
*rt2x00dev
= queue
->rt2x00dev
;
424 rt2x00dev
->ops
->lib
->write_tx_desc(rt2x00dev
, entry
->skb
, txdesc
);
427 * All processing on the frame has been completed, this means
428 * it is now ready to be dumped to userspace through debugfs.
430 rt2x00debug_dump_frame(rt2x00dev
, DUMP_FRAME_TX
, entry
->skb
);
433 static void rt2x00queue_kick_tx_queue(struct queue_entry
*entry
,
434 struct txentry_desc
*txdesc
)
436 struct data_queue
*queue
= entry
->queue
;
437 struct rt2x00_dev
*rt2x00dev
= queue
->rt2x00dev
;
440 * Check if we need to kick the queue, there are however a few rules
441 * 1) Don't kick unless this is the last in frame in a burst.
442 * When the burst flag is set, this frame is always followed
443 * by another frame which in some way are related to eachother.
444 * This is true for fragments, RTS or CTS-to-self frames.
445 * 2) Rule 1 can be broken when the available entries
446 * in the queue are less then a certain threshold.
448 if (rt2x00queue_threshold(queue
) ||
449 !test_bit(ENTRY_TXD_BURST
, &txdesc
->flags
))
450 rt2x00dev
->ops
->lib
->kick_tx_queue(rt2x00dev
, queue
->qid
);
453 int rt2x00queue_write_tx_frame(struct data_queue
*queue
, struct sk_buff
*skb
,
456 struct ieee80211_tx_info
*tx_info
;
457 struct queue_entry
*entry
= rt2x00queue_get_entry(queue
, Q_INDEX
);
458 struct txentry_desc txdesc
;
459 struct skb_frame_desc
*skbdesc
;
460 u8 rate_idx
, rate_flags
;
462 if (unlikely(rt2x00queue_full(queue
)))
465 if (test_and_set_bit(ENTRY_OWNER_DEVICE_DATA
, &entry
->flags
)) {
466 ERROR(queue
->rt2x00dev
,
467 "Arrived at non-free entry in the non-full queue %d.\n"
468 "Please file bug report to %s.\n",
469 queue
->qid
, DRV_PROJECT
);
474 * Copy all TX descriptor information into txdesc,
475 * after that we are free to use the skb->cb array
476 * for our information.
479 rt2x00queue_create_tx_descriptor(entry
, &txdesc
);
482 * All information is retrieved from the skb->cb array,
483 * now we should claim ownership of the driver part of that
484 * array, preserving the bitrate index and flags.
486 tx_info
= IEEE80211_SKB_CB(skb
);
487 rate_idx
= tx_info
->control
.rates
[0].idx
;
488 rate_flags
= tx_info
->control
.rates
[0].flags
;
489 skbdesc
= get_skb_frame_desc(skb
);
490 memset(skbdesc
, 0, sizeof(*skbdesc
));
491 skbdesc
->entry
= entry
;
492 skbdesc
->tx_rate_idx
= rate_idx
;
493 skbdesc
->tx_rate_flags
= rate_flags
;
496 skbdesc
->flags
|= SKBDESC_NOT_MAC80211
;
499 * When hardware encryption is supported, and this frame
500 * is to be encrypted, we should strip the IV/EIV data from
501 * the frame so we can provide it to the driver seperately.
503 if (test_bit(ENTRY_TXD_ENCRYPT
, &txdesc
.flags
) &&
504 !test_bit(ENTRY_TXD_ENCRYPT_IV
, &txdesc
.flags
)) {
505 if (test_bit(DRIVER_REQUIRE_COPY_IV
, &queue
->rt2x00dev
->flags
))
506 rt2x00crypto_tx_copy_iv(skb
, &txdesc
);
508 rt2x00crypto_tx_remove_iv(skb
, &txdesc
);
512 * When DMA allocation is required we should guarentee to the
513 * driver that the DMA is aligned to a 4-byte boundary.
514 * However some drivers require L2 padding to pad the payload
515 * rather then the header. This could be a requirement for
516 * PCI and USB devices, while header alignment only is valid
519 if (test_bit(DRIVER_REQUIRE_L2PAD
, &queue
->rt2x00dev
->flags
))
520 rt2x00queue_insert_l2pad(entry
->skb
, txdesc
.header_length
);
521 else if (test_bit(DRIVER_REQUIRE_DMA
, &queue
->rt2x00dev
->flags
))
522 rt2x00queue_align_frame(entry
->skb
);
525 * It could be possible that the queue was corrupted and this
526 * call failed. Since we always return NETDEV_TX_OK to mac80211,
527 * this frame will simply be dropped.
529 if (unlikely(queue
->rt2x00dev
->ops
->lib
->write_tx_data(entry
,
531 clear_bit(ENTRY_OWNER_DEVICE_DATA
, &entry
->flags
);
536 if (test_bit(DRIVER_REQUIRE_DMA
, &queue
->rt2x00dev
->flags
))
537 rt2x00queue_map_txskb(queue
->rt2x00dev
, skb
);
539 set_bit(ENTRY_DATA_PENDING
, &entry
->flags
);
541 rt2x00queue_index_inc(queue
, Q_INDEX
);
542 rt2x00queue_write_tx_descriptor(entry
, &txdesc
);
543 rt2x00queue_kick_tx_queue(entry
, &txdesc
);
548 int rt2x00queue_update_beacon(struct rt2x00_dev
*rt2x00dev
,
549 struct ieee80211_vif
*vif
,
550 const bool enable_beacon
)
552 struct rt2x00_intf
*intf
= vif_to_intf(vif
);
553 struct skb_frame_desc
*skbdesc
;
554 struct txentry_desc txdesc
;
556 if (unlikely(!intf
->beacon
))
559 mutex_lock(&intf
->beacon_skb_mutex
);
562 * Clean up the beacon skb.
564 rt2x00queue_free_skb(rt2x00dev
, intf
->beacon
->skb
);
565 intf
->beacon
->skb
= NULL
;
567 if (!enable_beacon
) {
568 rt2x00dev
->ops
->lib
->kill_tx_queue(rt2x00dev
, QID_BEACON
);
569 mutex_unlock(&intf
->beacon_skb_mutex
);
573 intf
->beacon
->skb
= ieee80211_beacon_get(rt2x00dev
->hw
, vif
);
574 if (!intf
->beacon
->skb
) {
575 mutex_unlock(&intf
->beacon_skb_mutex
);
580 * Copy all TX descriptor information into txdesc,
581 * after that we are free to use the skb->cb array
582 * for our information.
584 rt2x00queue_create_tx_descriptor(intf
->beacon
, &txdesc
);
587 * Fill in skb descriptor
589 skbdesc
= get_skb_frame_desc(intf
->beacon
->skb
);
590 memset(skbdesc
, 0, sizeof(*skbdesc
));
591 skbdesc
->entry
= intf
->beacon
;
594 * Write TX descriptor into reserved room in front of the beacon.
596 rt2x00queue_write_tx_descriptor(intf
->beacon
, &txdesc
);
599 * Send beacon to hardware and enable beacon genaration..
601 rt2x00dev
->ops
->lib
->write_beacon(intf
->beacon
, &txdesc
);
603 mutex_unlock(&intf
->beacon_skb_mutex
);
608 struct data_queue
*rt2x00queue_get_queue(struct rt2x00_dev
*rt2x00dev
,
609 const enum data_queue_qid queue
)
611 int atim
= test_bit(DRIVER_REQUIRE_ATIM_QUEUE
, &rt2x00dev
->flags
);
614 return rt2x00dev
->rx
;
616 if (queue
< rt2x00dev
->ops
->tx_queues
&& rt2x00dev
->tx
)
617 return &rt2x00dev
->tx
[queue
];
622 if (queue
== QID_BEACON
)
623 return &rt2x00dev
->bcn
[0];
624 else if (queue
== QID_ATIM
&& atim
)
625 return &rt2x00dev
->bcn
[1];
629 EXPORT_SYMBOL_GPL(rt2x00queue_get_queue
);
631 struct queue_entry
*rt2x00queue_get_entry(struct data_queue
*queue
,
632 enum queue_index index
)
634 struct queue_entry
*entry
;
635 unsigned long irqflags
;
637 if (unlikely(index
>= Q_INDEX_MAX
)) {
638 ERROR(queue
->rt2x00dev
,
639 "Entry requested from invalid index type (%d)\n", index
);
643 spin_lock_irqsave(&queue
->lock
, irqflags
);
645 entry
= &queue
->entries
[queue
->index
[index
]];
647 spin_unlock_irqrestore(&queue
->lock
, irqflags
);
651 EXPORT_SYMBOL_GPL(rt2x00queue_get_entry
);
653 void rt2x00queue_index_inc(struct data_queue
*queue
, enum queue_index index
)
655 unsigned long irqflags
;
657 if (unlikely(index
>= Q_INDEX_MAX
)) {
658 ERROR(queue
->rt2x00dev
,
659 "Index change on invalid index type (%d)\n", index
);
663 spin_lock_irqsave(&queue
->lock
, irqflags
);
665 queue
->index
[index
]++;
666 if (queue
->index
[index
] >= queue
->limit
)
667 queue
->index
[index
] = 0;
669 if (index
== Q_INDEX
) {
671 } else if (index
== Q_INDEX_DONE
) {
676 spin_unlock_irqrestore(&queue
->lock
, irqflags
);
679 static void rt2x00queue_reset(struct data_queue
*queue
)
681 unsigned long irqflags
;
683 spin_lock_irqsave(&queue
->lock
, irqflags
);
687 memset(queue
->index
, 0, sizeof(queue
->index
));
689 spin_unlock_irqrestore(&queue
->lock
, irqflags
);
692 void rt2x00queue_stop_queues(struct rt2x00_dev
*rt2x00dev
)
694 struct data_queue
*queue
;
696 txall_queue_for_each(rt2x00dev
, queue
)
697 rt2x00dev
->ops
->lib
->kill_tx_queue(rt2x00dev
, queue
->qid
);
700 void rt2x00queue_init_queues(struct rt2x00_dev
*rt2x00dev
)
702 struct data_queue
*queue
;
705 queue_for_each(rt2x00dev
, queue
) {
706 rt2x00queue_reset(queue
);
708 for (i
= 0; i
< queue
->limit
; i
++) {
709 queue
->entries
[i
].flags
= 0;
711 rt2x00dev
->ops
->lib
->clear_entry(&queue
->entries
[i
]);
716 static int rt2x00queue_alloc_entries(struct data_queue
*queue
,
717 const struct data_queue_desc
*qdesc
)
719 struct queue_entry
*entries
;
720 unsigned int entry_size
;
723 rt2x00queue_reset(queue
);
725 queue
->limit
= qdesc
->entry_num
;
726 queue
->threshold
= DIV_ROUND_UP(qdesc
->entry_num
, 10);
727 queue
->data_size
= qdesc
->data_size
;
728 queue
->desc_size
= qdesc
->desc_size
;
731 * Allocate all queue entries.
733 entry_size
= sizeof(*entries
) + qdesc
->priv_size
;
734 entries
= kzalloc(queue
->limit
* entry_size
, GFP_KERNEL
);
738 #define QUEUE_ENTRY_PRIV_OFFSET(__base, __index, __limit, __esize, __psize) \
739 ( ((char *)(__base)) + ((__limit) * (__esize)) + \
740 ((__index) * (__psize)) )
742 for (i
= 0; i
< queue
->limit
; i
++) {
743 entries
[i
].flags
= 0;
744 entries
[i
].queue
= queue
;
745 entries
[i
].skb
= NULL
;
746 entries
[i
].entry_idx
= i
;
747 entries
[i
].priv_data
=
748 QUEUE_ENTRY_PRIV_OFFSET(entries
, i
, queue
->limit
,
749 sizeof(*entries
), qdesc
->priv_size
);
752 #undef QUEUE_ENTRY_PRIV_OFFSET
754 queue
->entries
= entries
;
759 static void rt2x00queue_free_skbs(struct rt2x00_dev
*rt2x00dev
,
760 struct data_queue
*queue
)
767 for (i
= 0; i
< queue
->limit
; i
++) {
768 if (queue
->entries
[i
].skb
)
769 rt2x00queue_free_skb(rt2x00dev
, queue
->entries
[i
].skb
);
773 static int rt2x00queue_alloc_rxskbs(struct rt2x00_dev
*rt2x00dev
,
774 struct data_queue
*queue
)
779 for (i
= 0; i
< queue
->limit
; i
++) {
780 skb
= rt2x00queue_alloc_rxskb(rt2x00dev
, &queue
->entries
[i
]);
783 queue
->entries
[i
].skb
= skb
;
789 int rt2x00queue_initialize(struct rt2x00_dev
*rt2x00dev
)
791 struct data_queue
*queue
;
794 status
= rt2x00queue_alloc_entries(rt2x00dev
->rx
, rt2x00dev
->ops
->rx
);
798 tx_queue_for_each(rt2x00dev
, queue
) {
799 status
= rt2x00queue_alloc_entries(queue
, rt2x00dev
->ops
->tx
);
804 status
= rt2x00queue_alloc_entries(rt2x00dev
->bcn
, rt2x00dev
->ops
->bcn
);
808 if (test_bit(DRIVER_REQUIRE_ATIM_QUEUE
, &rt2x00dev
->flags
)) {
809 status
= rt2x00queue_alloc_entries(&rt2x00dev
->bcn
[1],
810 rt2x00dev
->ops
->atim
);
815 status
= rt2x00queue_alloc_rxskbs(rt2x00dev
, rt2x00dev
->rx
);
822 ERROR(rt2x00dev
, "Queue entries allocation failed.\n");
824 rt2x00queue_uninitialize(rt2x00dev
);
829 void rt2x00queue_uninitialize(struct rt2x00_dev
*rt2x00dev
)
831 struct data_queue
*queue
;
833 rt2x00queue_free_skbs(rt2x00dev
, rt2x00dev
->rx
);
835 queue_for_each(rt2x00dev
, queue
) {
836 kfree(queue
->entries
);
837 queue
->entries
= NULL
;
841 static void rt2x00queue_init(struct rt2x00_dev
*rt2x00dev
,
842 struct data_queue
*queue
, enum data_queue_qid qid
)
844 spin_lock_init(&queue
->lock
);
846 queue
->rt2x00dev
= rt2x00dev
;
854 int rt2x00queue_allocate(struct rt2x00_dev
*rt2x00dev
)
856 struct data_queue
*queue
;
857 enum data_queue_qid qid
;
858 unsigned int req_atim
=
859 !!test_bit(DRIVER_REQUIRE_ATIM_QUEUE
, &rt2x00dev
->flags
);
862 * We need the following queues:
866 * Atim: 1 (if required)
868 rt2x00dev
->data_queues
= 2 + rt2x00dev
->ops
->tx_queues
+ req_atim
;
870 queue
= kzalloc(rt2x00dev
->data_queues
* sizeof(*queue
), GFP_KERNEL
);
872 ERROR(rt2x00dev
, "Queue allocation failed.\n");
877 * Initialize pointers
879 rt2x00dev
->rx
= queue
;
880 rt2x00dev
->tx
= &queue
[1];
881 rt2x00dev
->bcn
= &queue
[1 + rt2x00dev
->ops
->tx_queues
];
884 * Initialize queue parameters.
886 * TX: qid = QID_AC_BE + index
887 * TX: cw_min: 2^5 = 32.
888 * TX: cw_max: 2^10 = 1024.
889 * BCN: qid = QID_BEACON
890 * ATIM: qid = QID_ATIM
892 rt2x00queue_init(rt2x00dev
, rt2x00dev
->rx
, QID_RX
);
895 tx_queue_for_each(rt2x00dev
, queue
)
896 rt2x00queue_init(rt2x00dev
, queue
, qid
++);
898 rt2x00queue_init(rt2x00dev
, &rt2x00dev
->bcn
[0], QID_BEACON
);
900 rt2x00queue_init(rt2x00dev
, &rt2x00dev
->bcn
[1], QID_ATIM
);
905 void rt2x00queue_free(struct rt2x00_dev
*rt2x00dev
)
907 kfree(rt2x00dev
->rx
);
908 rt2x00dev
->rx
= NULL
;
909 rt2x00dev
->tx
= NULL
;
910 rt2x00dev
->bcn
= NULL
;