2 * This file is part of wl1271
4 * Copyright (C) 2009 Nokia Corporation
6 * Contact: Luciano Coelho <luciano.coelho@nokia.com>
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License
10 * version 2 as published by the Free Software Foundation.
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
24 #include <linux/kernel.h>
25 #include <linux/module.h>
26 #include <linux/etherdevice.h>
34 static int wl1271_set_default_wep_key(struct wl1271
*wl
, u8 id
)
37 bool is_ap
= (wl
->bss_type
== BSS_TYPE_AP_BSS
);
40 ret
= wl12xx_cmd_set_default_wep_key(wl
, id
,
41 WL1271_AP_BROADCAST_HLID
);
43 ret
= wl12xx_cmd_set_default_wep_key(wl
, id
, wl
->sta_hlid
);
48 wl1271_debug(DEBUG_CRYPT
, "default wep key idx: %d", (int)id
);
52 static int wl1271_alloc_tx_id(struct wl1271
*wl
, struct sk_buff
*skb
)
56 id
= find_first_zero_bit(wl
->tx_frames_map
, ACX_TX_DESCRIPTORS
);
57 if (id
>= ACX_TX_DESCRIPTORS
)
60 __set_bit(id
, wl
->tx_frames_map
);
61 wl
->tx_frames
[id
] = skb
;
66 static void wl1271_free_tx_id(struct wl1271
*wl
, int id
)
68 if (__test_and_clear_bit(id
, wl
->tx_frames_map
)) {
69 if (unlikely(wl
->tx_frames_cnt
== ACX_TX_DESCRIPTORS
))
70 clear_bit(WL1271_FLAG_FW_TX_BUSY
, &wl
->flags
);
72 wl
->tx_frames
[id
] = NULL
;
77 static int wl1271_tx_update_filters(struct wl1271
*wl
,
80 struct ieee80211_hdr
*hdr
;
82 hdr
= (struct ieee80211_hdr
*)(skb
->data
+
83 sizeof(struct wl1271_tx_hw_descr
));
86 * stop bssid-based filtering before transmitting authentication
87 * requests. this way the hw will never drop authentication
88 * responses coming from BSSIDs it isn't familiar with (e.g. on
91 if (!ieee80211_is_auth(hdr
->frame_control
))
97 static void wl1271_tx_ap_update_inconnection_sta(struct wl1271
*wl
,
100 struct ieee80211_hdr
*hdr
;
103 * add the station to the known list before transmitting the
104 * authentication response. this way it won't get de-authed by FW
105 * when transmitting too soon.
107 hdr
= (struct ieee80211_hdr
*)(skb
->data
+
108 sizeof(struct wl1271_tx_hw_descr
));
109 if (ieee80211_is_auth(hdr
->frame_control
))
110 wl1271_acx_set_inconnection_sta(wl
, hdr
->addr1
);
114 static void wl1271_tx_regulate_link(struct wl1271
*wl
, u8 hlid
)
119 /* only regulate station links */
120 if (hlid
< WL1271_AP_STA_HLID_START
)
123 fw_ps
= test_bit(hlid
, (unsigned long *)&wl
->ap_fw_ps_map
);
124 tx_blks
= wl
->links
[hlid
].allocated_blks
;
127 * if in FW PS and there is enough data in FW we can put the link
128 * into high-level PS and clean out its TX queues.
130 if (fw_ps
&& tx_blks
>= WL1271_PS_STA_MAX_BLOCKS
)
131 wl1271_ps_link_start(wl
, hlid
, true);
135 static bool wl12xx_is_dummy_packet(struct wl1271
*wl
, struct sk_buff
*skb
)
137 return wl
->dummy_packet
== skb
;
140 u8
wl12xx_tx_get_hlid_ap(struct wl1271
*wl
, struct sk_buff
*skb
)
142 struct ieee80211_tx_info
*control
= IEEE80211_SKB_CB(skb
);
144 if (control
->control
.sta
) {
145 struct wl1271_station
*wl_sta
;
147 wl_sta
= (struct wl1271_station
*)
148 control
->control
.sta
->drv_priv
;
151 struct ieee80211_hdr
*hdr
;
153 if (!test_bit(WL1271_FLAG_AP_STARTED
, &wl
->flags
))
154 return wl
->system_hlid
;
156 hdr
= (struct ieee80211_hdr
*)skb
->data
;
157 if (ieee80211_is_mgmt(hdr
->frame_control
))
158 return WL1271_AP_GLOBAL_HLID
;
160 return WL1271_AP_BROADCAST_HLID
;
164 static u8
wl1271_tx_get_hlid(struct wl1271
*wl
, struct sk_buff
*skb
)
166 if (wl12xx_is_dummy_packet(wl
, skb
))
167 return wl
->system_hlid
;
169 if (wl
->bss_type
== BSS_TYPE_AP_BSS
)
170 return wl12xx_tx_get_hlid_ap(wl
, skb
);
172 if (test_bit(WL1271_FLAG_STA_ASSOCIATED
, &wl
->flags
))
178 static unsigned int wl12xx_calc_packet_alignment(struct wl1271
*wl
,
179 unsigned int packet_length
)
181 if (wl
->quirks
& WL12XX_QUIRK_BLOCKSIZE_ALIGNMENT
)
182 return ALIGN(packet_length
, WL12XX_BUS_BLOCK_SIZE
);
184 return ALIGN(packet_length
, WL1271_TX_ALIGN_TO
);
187 static int wl1271_tx_allocate(struct wl1271
*wl
, struct sk_buff
*skb
, u32 extra
,
188 u32 buf_offset
, u8 hlid
)
190 struct wl1271_tx_hw_descr
*desc
;
191 u32 total_len
= skb
->len
+ sizeof(struct wl1271_tx_hw_descr
) + extra
;
194 int id
, ret
= -EBUSY
;
196 /* we use 1 spare block */
197 u32 spare_blocks
= 1;
199 if (buf_offset
+ total_len
> WL1271_AGGR_BUFFER_SIZE
)
202 /* allocate free identifier for the packet */
203 id
= wl1271_alloc_tx_id(wl
, skb
);
207 /* approximate the number of blocks required for this packet
209 len
= wl12xx_calc_packet_alignment(wl
, total_len
);
211 total_blocks
= (len
+ TX_HW_BLOCK_SIZE
- 1) / TX_HW_BLOCK_SIZE
+
214 if (total_blocks
<= wl
->tx_blocks_available
) {
215 desc
= (struct wl1271_tx_hw_descr
*)skb_push(
216 skb
, total_len
- skb
->len
);
218 /* HW descriptor fields change between wl127x and wl128x */
219 if (wl
->chip
.id
== CHIP_ID_1283_PG20
) {
220 desc
->wl128x_mem
.total_mem_blocks
= total_blocks
;
222 desc
->wl127x_mem
.extra_blocks
= spare_blocks
;
223 desc
->wl127x_mem
.total_mem_blocks
= total_blocks
;
228 wl
->tx_blocks_available
-= total_blocks
;
229 wl
->tx_allocated_blocks
+= total_blocks
;
231 if (wl
->bss_type
== BSS_TYPE_AP_BSS
)
232 wl
->links
[hlid
].allocated_blks
+= total_blocks
;
236 wl1271_debug(DEBUG_TX
,
237 "tx_allocate: size: %d, blocks: %d, id: %d",
238 total_len
, total_blocks
, id
);
240 wl1271_free_tx_id(wl
, id
);
246 static void wl1271_tx_fill_hdr(struct wl1271
*wl
, struct sk_buff
*skb
,
247 u32 extra
, struct ieee80211_tx_info
*control
,
251 struct wl1271_tx_hw_descr
*desc
;
252 int aligned_len
, ac
, rate_idx
;
256 desc
= (struct wl1271_tx_hw_descr
*) skb
->data
;
258 /* relocate space for security header */
260 void *framestart
= skb
->data
+ sizeof(*desc
);
261 u16 fc
= *(u16
*)(framestart
+ extra
);
262 int hdrlen
= ieee80211_hdrlen(cpu_to_le16(fc
));
263 memmove(framestart
, framestart
+ extra
, hdrlen
);
266 /* configure packet life time */
268 hosttime
= (timespec_to_ns(&ts
) >> 10);
269 desc
->start_time
= cpu_to_le32(hosttime
- wl
->time_offset
);
271 if (wl
->bss_type
!= BSS_TYPE_AP_BSS
)
272 desc
->life_time
= cpu_to_le16(TX_HW_MGMT_PKT_LIFETIME_TU
);
274 desc
->life_time
= cpu_to_le16(TX_HW_AP_MODE_PKT_LIFETIME_TU
);
277 ac
= wl1271_tx_get_queue(skb_get_queue_mapping(skb
));
278 desc
->tid
= skb
->priority
;
280 if (wl12xx_is_dummy_packet(wl
, skb
)) {
282 * FW expects the dummy packet to have an invalid session id -
283 * any session id that is different than the one set in the join
285 tx_attr
= ((~wl
->session_counter
) <<
286 TX_HW_ATTR_OFST_SESSION_COUNTER
) &
287 TX_HW_ATTR_SESSION_COUNTER
;
289 tx_attr
|= TX_HW_ATTR_TX_DUMMY_REQ
;
291 /* configure the tx attributes */
293 wl
->session_counter
<< TX_HW_ATTR_OFST_SESSION_COUNTER
;
298 if (wl
->bss_type
!= BSS_TYPE_AP_BSS
) {
299 /* if the packets are destined for AP (have a STA entry)
300 send them with AP rate policies, otherwise use default
302 if (control
->control
.sta
)
303 rate_idx
= ACX_TX_AP_FULL_RATE
;
305 rate_idx
= ACX_TX_BASIC_RATE
;
308 case WL1271_AP_GLOBAL_HLID
:
309 rate_idx
= ACX_TX_AP_MODE_MGMT_RATE
;
311 case WL1271_AP_BROADCAST_HLID
:
312 rate_idx
= ACX_TX_AP_MODE_BCST_RATE
;
320 tx_attr
|= rate_idx
<< TX_HW_ATTR_OFST_RATE_POLICY
;
323 aligned_len
= wl12xx_calc_packet_alignment(wl
, skb
->len
);
325 if (wl
->chip
.id
== CHIP_ID_1283_PG20
) {
326 desc
->wl128x_mem
.extra_bytes
= aligned_len
- skb
->len
;
327 desc
->length
= cpu_to_le16(aligned_len
>> 2);
329 wl1271_debug(DEBUG_TX
, "tx_fill_hdr: hlid: %d "
330 "tx_attr: 0x%x len: %d life: %d mem: %d",
332 le16_to_cpu(desc
->length
),
333 le16_to_cpu(desc
->life_time
),
334 desc
->wl128x_mem
.total_mem_blocks
);
338 /* Store the aligned length in terms of words */
339 desc
->length
= cpu_to_le16(aligned_len
>> 2);
341 /* calculate number of padding bytes */
342 pad
= aligned_len
- skb
->len
;
343 tx_attr
|= pad
<< TX_HW_ATTR_OFST_LAST_WORD_PAD
;
345 wl1271_debug(DEBUG_TX
, "tx_fill_hdr: pad: %d hlid: %d "
346 "tx_attr: 0x%x len: %d life: %d mem: %d", pad
,
348 le16_to_cpu(desc
->length
),
349 le16_to_cpu(desc
->life_time
),
350 desc
->wl127x_mem
.total_mem_blocks
);
353 desc
->tx_attr
= cpu_to_le16(tx_attr
);
356 /* caller must hold wl->mutex */
357 static int wl1271_prepare_tx_frame(struct wl1271
*wl
, struct sk_buff
*skb
,
360 struct ieee80211_tx_info
*info
;
369 info
= IEEE80211_SKB_CB(skb
);
371 if (info
->control
.hw_key
&&
372 info
->control
.hw_key
->cipher
== WLAN_CIPHER_SUITE_TKIP
)
373 extra
= WL1271_TKIP_IV_SPACE
;
375 if (info
->control
.hw_key
) {
377 u8 idx
= info
->control
.hw_key
->hw_key_idx
;
378 u32 cipher
= info
->control
.hw_key
->cipher
;
380 is_wep
= (cipher
== WLAN_CIPHER_SUITE_WEP40
) ||
381 (cipher
== WLAN_CIPHER_SUITE_WEP104
);
383 if (unlikely(is_wep
&& wl
->default_key
!= idx
)) {
384 ret
= wl1271_set_default_wep_key(wl
, idx
);
387 wl
->default_key
= idx
;
391 hlid
= wl1271_tx_get_hlid(wl
, skb
);
392 if (hlid
== WL12XX_INVALID_LINK_ID
) {
393 wl1271_error("invalid hlid. dropping skb 0x%p", skb
);
397 ret
= wl1271_tx_allocate(wl
, skb
, extra
, buf_offset
, hlid
);
401 wl1271_tx_fill_hdr(wl
, skb
, extra
, info
, hlid
);
403 if (wl
->bss_type
== BSS_TYPE_AP_BSS
) {
404 wl1271_tx_ap_update_inconnection_sta(wl
, skb
);
406 wl1271_tx_regulate_link(wl
, hlid
);
409 wl1271_tx_update_filters(wl
, skb
);
413 * The length of each packet is stored in terms of
414 * words. Thus, we must pad the skb data to make sure its
415 * length is aligned. The number of padding bytes is computed
416 * and set in wl1271_tx_fill_hdr.
417 * In special cases, we want to align to a specific block size
418 * (eg. for wl128x with SDIO we align to 256).
420 total_len
= wl12xx_calc_packet_alignment(wl
, skb
->len
);
422 memcpy(wl
->aggr_buf
+ buf_offset
, skb
->data
, skb
->len
);
423 memset(wl
->aggr_buf
+ buf_offset
+ skb
->len
, 0, total_len
- skb
->len
);
425 /* Revert side effects in the dummy packet skb, so it can be reused */
426 if (wl12xx_is_dummy_packet(wl
, skb
))
427 skb_pull(skb
, sizeof(struct wl1271_tx_hw_descr
));
432 u32
wl1271_tx_enabled_rates_get(struct wl1271
*wl
, u32 rate_set
)
434 struct ieee80211_supported_band
*band
;
435 u32 enabled_rates
= 0;
438 band
= wl
->hw
->wiphy
->bands
[wl
->band
];
439 for (bit
= 0; bit
< band
->n_bitrates
; bit
++) {
441 enabled_rates
|= band
->bitrates
[bit
].hw_value
;
445 #ifdef CONFIG_WL12XX_HT
446 /* MCS rates indication are on bits 16 - 23 */
447 rate_set
>>= HW_HT_RATES_OFFSET
- band
->n_bitrates
;
449 for (bit
= 0; bit
< 8; bit
++) {
451 enabled_rates
|= (CONF_HW_BIT_RATE_MCS_0
<< bit
);
456 return enabled_rates
;
459 void wl1271_handle_tx_low_watermark(struct wl1271
*wl
)
464 for (i
= 0; i
< NUM_TX_QUEUES
; i
++) {
465 if (test_bit(i
, &wl
->stopped_queues_map
) &&
466 wl
->tx_queue_count
[i
] <= WL1271_TX_QUEUE_LOW_WATERMARK
) {
467 /* firmware buffer has space, restart queues */
468 spin_lock_irqsave(&wl
->wl_lock
, flags
);
469 ieee80211_wake_queue(wl
->hw
,
470 wl1271_tx_get_mac80211_queue(i
));
471 clear_bit(i
, &wl
->stopped_queues_map
);
472 spin_unlock_irqrestore(&wl
->wl_lock
, flags
);
477 static struct sk_buff
*wl1271_sta_skb_dequeue(struct wl1271
*wl
)
479 struct sk_buff
*skb
= NULL
;
482 skb
= skb_dequeue(&wl
->tx_queue
[CONF_TX_AC_VO
]);
485 skb
= skb_dequeue(&wl
->tx_queue
[CONF_TX_AC_VI
]);
488 skb
= skb_dequeue(&wl
->tx_queue
[CONF_TX_AC_BE
]);
491 skb
= skb_dequeue(&wl
->tx_queue
[CONF_TX_AC_BK
]);
495 int q
= wl1271_tx_get_queue(skb_get_queue_mapping(skb
));
496 spin_lock_irqsave(&wl
->wl_lock
, flags
);
497 wl
->tx_queue_count
[q
]--;
498 spin_unlock_irqrestore(&wl
->wl_lock
, flags
);
504 static struct sk_buff
*wl1271_ap_skb_dequeue(struct wl1271
*wl
)
506 struct sk_buff
*skb
= NULL
;
508 int i
, h
, start_hlid
;
510 /* start from the link after the last one */
511 start_hlid
= (wl
->last_tx_hlid
+ 1) % AP_MAX_LINKS
;
513 /* dequeue according to AC, round robin on each link */
514 for (i
= 0; i
< AP_MAX_LINKS
; i
++) {
515 h
= (start_hlid
+ i
) % AP_MAX_LINKS
;
517 skb
= skb_dequeue(&wl
->links
[h
].tx_queue
[CONF_TX_AC_VO
]);
520 skb
= skb_dequeue(&wl
->links
[h
].tx_queue
[CONF_TX_AC_VI
]);
523 skb
= skb_dequeue(&wl
->links
[h
].tx_queue
[CONF_TX_AC_BE
]);
526 skb
= skb_dequeue(&wl
->links
[h
].tx_queue
[CONF_TX_AC_BK
]);
533 int q
= wl1271_tx_get_queue(skb_get_queue_mapping(skb
));
534 wl
->last_tx_hlid
= h
;
535 spin_lock_irqsave(&wl
->wl_lock
, flags
);
536 wl
->tx_queue_count
[q
]--;
537 spin_unlock_irqrestore(&wl
->wl_lock
, flags
);
539 wl
->last_tx_hlid
= 0;
545 static struct sk_buff
*wl1271_skb_dequeue(struct wl1271
*wl
)
548 struct sk_buff
*skb
= NULL
;
550 if (wl
->bss_type
== BSS_TYPE_AP_BSS
)
551 skb
= wl1271_ap_skb_dequeue(wl
);
553 skb
= wl1271_sta_skb_dequeue(wl
);
556 test_and_clear_bit(WL1271_FLAG_DUMMY_PACKET_PENDING
, &wl
->flags
)) {
559 skb
= wl
->dummy_packet
;
560 q
= wl1271_tx_get_queue(skb_get_queue_mapping(skb
));
561 spin_lock_irqsave(&wl
->wl_lock
, flags
);
562 wl
->tx_queue_count
[q
]--;
563 spin_unlock_irqrestore(&wl
->wl_lock
, flags
);
569 static void wl1271_skb_queue_head(struct wl1271
*wl
, struct sk_buff
*skb
)
572 int q
= wl1271_tx_get_queue(skb_get_queue_mapping(skb
));
574 if (wl12xx_is_dummy_packet(wl
, skb
)) {
575 set_bit(WL1271_FLAG_DUMMY_PACKET_PENDING
, &wl
->flags
);
576 } else if (wl
->bss_type
== BSS_TYPE_AP_BSS
) {
577 u8 hlid
= wl1271_tx_get_hlid(wl
, skb
);
578 skb_queue_head(&wl
->links
[hlid
].tx_queue
[q
], skb
);
580 /* make sure we dequeue the same packet next time */
581 wl
->last_tx_hlid
= (hlid
+ AP_MAX_LINKS
- 1) % AP_MAX_LINKS
;
583 skb_queue_head(&wl
->tx_queue
[q
], skb
);
586 spin_lock_irqsave(&wl
->wl_lock
, flags
);
587 wl
->tx_queue_count
[q
]++;
588 spin_unlock_irqrestore(&wl
->wl_lock
, flags
);
591 static bool wl1271_tx_is_data_present(struct sk_buff
*skb
)
593 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)(skb
->data
);
595 return ieee80211_is_data_present(hdr
->frame_control
);
598 void wl1271_tx_work_locked(struct wl1271
*wl
)
602 bool sent_packets
= false;
603 bool had_data
= false;
604 bool is_ap
= (wl
->bss_type
== BSS_TYPE_AP_BSS
);
607 if (unlikely(wl
->state
== WL1271_STATE_OFF
))
610 while ((skb
= wl1271_skb_dequeue(wl
))) {
611 if (wl1271_tx_is_data_present(skb
))
614 ret
= wl1271_prepare_tx_frame(wl
, skb
, buf_offset
);
615 if (ret
== -EAGAIN
) {
617 * Aggregation buffer is full.
618 * Flush buffer and try again.
620 wl1271_skb_queue_head(wl
, skb
);
621 wl1271_write(wl
, WL1271_SLV_MEM_DATA
, wl
->aggr_buf
,
626 } else if (ret
== -EBUSY
) {
628 * Firmware buffer is full.
629 * Queue back last skb, and stop aggregating.
631 wl1271_skb_queue_head(wl
, skb
);
632 /* No work left, avoid scheduling redundant tx work */
633 set_bit(WL1271_FLAG_FW_TX_BUSY
, &wl
->flags
);
635 } else if (ret
< 0) {
640 wl
->tx_packets_count
++;
645 wl1271_write(wl
, WL1271_SLV_MEM_DATA
, wl
->aggr_buf
,
651 * Interrupt the firmware with the new packets. This is only
652 * required for older hardware revisions
654 if (wl
->quirks
& WL12XX_QUIRK_END_OF_TRANSACTION
)
655 wl1271_write32(wl
, WL1271_HOST_WR_ACCESS
,
656 wl
->tx_packets_count
);
658 wl1271_handle_tx_low_watermark(wl
);
660 if (!is_ap
&& wl
->conf
.rx_streaming
.interval
&& had_data
&&
661 (wl
->conf
.rx_streaming
.always
||
662 test_bit(WL1271_FLAG_SOFT_GEMINI
, &wl
->flags
))) {
663 u32 timeout
= wl
->conf
.rx_streaming
.duration
;
665 /* enable rx streaming */
666 if (!test_bit(WL1271_FLAG_RX_STREAMING_STARTED
, &wl
->flags
))
667 ieee80211_queue_work(wl
->hw
,
668 &wl
->rx_streaming_enable_work
);
670 mod_timer(&wl
->rx_streaming_timer
,
671 jiffies
+ msecs_to_jiffies(timeout
));
675 void wl1271_tx_work(struct work_struct
*work
)
677 struct wl1271
*wl
= container_of(work
, struct wl1271
, tx_work
);
680 mutex_lock(&wl
->mutex
);
681 ret
= wl1271_ps_elp_wakeup(wl
);
685 wl1271_tx_work_locked(wl
);
687 wl1271_ps_elp_sleep(wl
);
689 mutex_unlock(&wl
->mutex
);
692 static void wl1271_tx_complete_packet(struct wl1271
*wl
,
693 struct wl1271_tx_hw_res_descr
*result
)
695 struct ieee80211_tx_info
*info
;
701 /* check for id legality */
702 if (unlikely(id
>= ACX_TX_DESCRIPTORS
|| wl
->tx_frames
[id
] == NULL
)) {
703 wl1271_warning("TX result illegal id: %d", id
);
707 skb
= wl
->tx_frames
[id
];
708 info
= IEEE80211_SKB_CB(skb
);
710 if (wl12xx_is_dummy_packet(wl
, skb
)) {
711 wl1271_free_tx_id(wl
, id
);
715 /* update the TX status info */
716 if (result
->status
== TX_SUCCESS
) {
717 if (!(info
->flags
& IEEE80211_TX_CTL_NO_ACK
))
718 info
->flags
|= IEEE80211_TX_STAT_ACK
;
719 rate
= wl1271_rate_to_idx(result
->rate_class_index
, wl
->band
);
720 retries
= result
->ack_failures
;
721 } else if (result
->status
== TX_RETRY_EXCEEDED
) {
722 wl
->stats
.excessive_retries
++;
723 retries
= result
->ack_failures
;
726 info
->status
.rates
[0].idx
= rate
;
727 info
->status
.rates
[0].count
= retries
;
728 info
->status
.rates
[0].flags
= 0;
729 info
->status
.ack_signal
= -1;
731 wl
->stats
.retry_count
+= result
->ack_failures
;
734 * update sequence number only when relevant, i.e. only in
735 * sessions of TKIP, AES and GEM (not in open or WEP sessions)
737 if (info
->control
.hw_key
&&
738 (info
->control
.hw_key
->cipher
== WLAN_CIPHER_SUITE_TKIP
||
739 info
->control
.hw_key
->cipher
== WLAN_CIPHER_SUITE_CCMP
||
740 info
->control
.hw_key
->cipher
== WL1271_CIPHER_SUITE_GEM
)) {
741 u8 fw_lsb
= result
->tx_security_sequence_number_lsb
;
742 u8 cur_lsb
= wl
->tx_security_last_seq_lsb
;
745 * update security sequence number, taking care of potential
748 wl
->tx_security_seq
+= (fw_lsb
- cur_lsb
+ 256) % 256;
749 wl
->tx_security_last_seq_lsb
= fw_lsb
;
752 /* remove private header from packet */
753 skb_pull(skb
, sizeof(struct wl1271_tx_hw_descr
));
755 /* remove TKIP header space if present */
756 if (info
->control
.hw_key
&&
757 info
->control
.hw_key
->cipher
== WLAN_CIPHER_SUITE_TKIP
) {
758 int hdrlen
= ieee80211_get_hdrlen_from_skb(skb
);
759 memmove(skb
->data
+ WL1271_TKIP_IV_SPACE
, skb
->data
, hdrlen
);
760 skb_pull(skb
, WL1271_TKIP_IV_SPACE
);
763 wl1271_debug(DEBUG_TX
, "tx status id %u skb 0x%p failures %u rate 0x%x"
765 result
->id
, skb
, result
->ack_failures
,
766 result
->rate_class_index
, result
->status
);
768 /* return the packet to the stack */
769 skb_queue_tail(&wl
->deferred_tx_queue
, skb
);
770 queue_work(wl
->freezable_wq
, &wl
->netstack_work
);
771 wl1271_free_tx_id(wl
, result
->id
);
774 /* Called upon reception of a TX complete interrupt */
775 void wl1271_tx_complete(struct wl1271
*wl
)
777 struct wl1271_acx_mem_map
*memmap
=
778 (struct wl1271_acx_mem_map
*)wl
->target_mem_map
;
779 u32 count
, fw_counter
;
782 /* read the tx results from the chipset */
783 wl1271_read(wl
, le32_to_cpu(memmap
->tx_result
),
784 wl
->tx_res_if
, sizeof(*wl
->tx_res_if
), false);
785 fw_counter
= le32_to_cpu(wl
->tx_res_if
->tx_result_fw_counter
);
787 /* write host counter to chipset (to ack) */
788 wl1271_write32(wl
, le32_to_cpu(memmap
->tx_result
) +
789 offsetof(struct wl1271_tx_hw_res_if
,
790 tx_result_host_counter
), fw_counter
);
792 count
= fw_counter
- wl
->tx_results_count
;
793 wl1271_debug(DEBUG_TX
, "tx_complete received, packets: %d", count
);
795 /* verify that the result buffer is not getting overrun */
796 if (unlikely(count
> TX_HW_RESULT_QUEUE_LEN
))
797 wl1271_warning("TX result overflow from chipset: %d", count
);
799 /* process the results */
800 for (i
= 0; i
< count
; i
++) {
801 struct wl1271_tx_hw_res_descr
*result
;
802 u8 offset
= wl
->tx_results_count
& TX_HW_RESULT_QUEUE_LEN_MASK
;
804 /* process the packet */
805 result
= &(wl
->tx_res_if
->tx_results_queue
[offset
]);
806 wl1271_tx_complete_packet(wl
, result
);
808 wl
->tx_results_count
++;
812 void wl1271_tx_reset_link_queues(struct wl1271
*wl
, u8 hlid
)
817 struct ieee80211_tx_info
*info
;
818 int total
[NUM_TX_QUEUES
];
820 for (i
= 0; i
< NUM_TX_QUEUES
; i
++) {
822 while ((skb
= skb_dequeue(&wl
->links
[hlid
].tx_queue
[i
]))) {
823 wl1271_debug(DEBUG_TX
, "link freeing skb 0x%p", skb
);
824 info
= IEEE80211_SKB_CB(skb
);
825 info
->status
.rates
[0].idx
= -1;
826 info
->status
.rates
[0].count
= 0;
827 ieee80211_tx_status_ni(wl
->hw
, skb
);
832 spin_lock_irqsave(&wl
->wl_lock
, flags
);
833 for (i
= 0; i
< NUM_TX_QUEUES
; i
++)
834 wl
->tx_queue_count
[i
] -= total
[i
];
835 spin_unlock_irqrestore(&wl
->wl_lock
, flags
);
837 wl1271_handle_tx_low_watermark(wl
);
840 /* caller must hold wl->mutex and TX must be stopped */
841 void wl1271_tx_reset(struct wl1271
*wl
, bool reset_tx_queues
)
845 struct ieee80211_tx_info
*info
;
848 if (wl
->bss_type
== BSS_TYPE_AP_BSS
) {
849 for (i
= 0; i
< AP_MAX_LINKS
; i
++) {
850 wl1271_tx_reset_link_queues(wl
, i
);
851 wl
->links
[i
].allocated_blks
= 0;
852 wl
->links
[i
].prev_freed_blks
= 0;
855 wl
->last_tx_hlid
= 0;
857 for (i
= 0; i
< NUM_TX_QUEUES
; i
++) {
858 while ((skb
= skb_dequeue(&wl
->tx_queue
[i
]))) {
859 wl1271_debug(DEBUG_TX
, "freeing skb 0x%p",
862 if (!wl12xx_is_dummy_packet(wl
, skb
)) {
863 info
= IEEE80211_SKB_CB(skb
);
864 info
->status
.rates
[0].idx
= -1;
865 info
->status
.rates
[0].count
= 0;
866 ieee80211_tx_status_ni(wl
->hw
, skb
);
869 wl
->tx_queue_count
[i
] = 0;
873 wl
->stopped_queues_map
= 0;
876 * Make sure the driver is at a consistent state, in case this
877 * function is called from a context other than interface removal.
878 * This call will always wake the TX queues.
881 wl1271_handle_tx_low_watermark(wl
);
883 for (i
= 0; i
< ACX_TX_DESCRIPTORS
; i
++) {
884 if (wl
->tx_frames
[i
] == NULL
)
887 skb
= wl
->tx_frames
[i
];
888 wl1271_free_tx_id(wl
, i
);
889 wl1271_debug(DEBUG_TX
, "freeing skb 0x%p", skb
);
891 if (!wl12xx_is_dummy_packet(wl
, skb
)) {
893 * Remove private headers before passing the skb to
896 info
= IEEE80211_SKB_CB(skb
);
897 skb_pull(skb
, sizeof(struct wl1271_tx_hw_descr
));
898 if (info
->control
.hw_key
&&
899 info
->control
.hw_key
->cipher
==
900 WLAN_CIPHER_SUITE_TKIP
) {
901 int hdrlen
= ieee80211_get_hdrlen_from_skb(skb
);
902 memmove(skb
->data
+ WL1271_TKIP_IV_SPACE
,
904 skb_pull(skb
, WL1271_TKIP_IV_SPACE
);
907 info
->status
.rates
[0].idx
= -1;
908 info
->status
.rates
[0].count
= 0;
910 ieee80211_tx_status_ni(wl
->hw
, skb
);
915 #define WL1271_TX_FLUSH_TIMEOUT 500000
917 /* caller must *NOT* hold wl->mutex */
918 void wl1271_tx_flush(struct wl1271
*wl
)
920 unsigned long timeout
;
921 timeout
= jiffies
+ usecs_to_jiffies(WL1271_TX_FLUSH_TIMEOUT
);
923 while (!time_after(jiffies
, timeout
)) {
924 mutex_lock(&wl
->mutex
);
925 wl1271_debug(DEBUG_TX
, "flushing tx buffer: %d %d",
927 wl1271_tx_total_queue_count(wl
));
928 if ((wl
->tx_frames_cnt
== 0) &&
929 (wl1271_tx_total_queue_count(wl
) == 0)) {
930 mutex_unlock(&wl
->mutex
);
933 mutex_unlock(&wl
->mutex
);
937 wl1271_warning("Unable to flush all TX buffers, timed out.");
940 u32
wl1271_tx_min_rate_get(struct wl1271
*wl
)
945 if (!wl
->basic_rate_set
) {
947 wl
->basic_rate_set
= wl
->conf
.tx
.basic_rate
;
950 for (i
= 0; !rate
; i
++) {
951 if ((wl
->basic_rate_set
>> i
) & 0x1)