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>
37 * TODO: this is here just for now, it must be removed when the data
38 * operations are in place.
40 #include "../wl12xx/reg.h"
42 static int wl1271_set_default_wep_key(struct wl1271
*wl
,
43 struct wl12xx_vif
*wlvif
, u8 id
)
46 bool is_ap
= (wlvif
->bss_type
== BSS_TYPE_AP_BSS
);
49 ret
= wl12xx_cmd_set_default_wep_key(wl
, id
,
50 wlvif
->ap
.bcast_hlid
);
52 ret
= wl12xx_cmd_set_default_wep_key(wl
, id
, wlvif
->sta
.hlid
);
57 wl1271_debug(DEBUG_CRYPT
, "default wep key idx: %d", (int)id
);
61 static int wl1271_alloc_tx_id(struct wl1271
*wl
, struct sk_buff
*skb
)
65 id
= find_first_zero_bit(wl
->tx_frames_map
, wl
->num_tx_desc
);
66 if (id
>= wl
->num_tx_desc
)
69 __set_bit(id
, wl
->tx_frames_map
);
70 wl
->tx_frames
[id
] = skb
;
75 void wl1271_free_tx_id(struct wl1271
*wl
, int id
)
77 if (__test_and_clear_bit(id
, wl
->tx_frames_map
)) {
78 if (unlikely(wl
->tx_frames_cnt
== wl
->num_tx_desc
))
79 clear_bit(WL1271_FLAG_FW_TX_BUSY
, &wl
->flags
);
81 wl
->tx_frames
[id
] = NULL
;
85 EXPORT_SYMBOL(wl1271_free_tx_id
);
87 static void wl1271_tx_ap_update_inconnection_sta(struct wl1271
*wl
,
90 struct ieee80211_hdr
*hdr
;
93 * add the station to the known list before transmitting the
94 * authentication response. this way it won't get de-authed by FW
95 * when transmitting too soon.
97 hdr
= (struct ieee80211_hdr
*)(skb
->data
+
98 sizeof(struct wl1271_tx_hw_descr
));
99 if (ieee80211_is_auth(hdr
->frame_control
))
100 wl1271_acx_set_inconnection_sta(wl
, hdr
->addr1
);
103 static void wl1271_tx_regulate_link(struct wl1271
*wl
,
104 struct wl12xx_vif
*wlvif
,
107 bool fw_ps
, single_sta
;
110 if (WARN_ON(!test_bit(hlid
, wlvif
->links_map
)))
113 fw_ps
= test_bit(hlid
, (unsigned long *)&wl
->ap_fw_ps_map
);
114 tx_pkts
= wl
->links
[hlid
].allocated_pkts
;
115 single_sta
= (wl
->active_sta_count
== 1);
118 * if in FW PS and there is enough data in FW we can put the link
119 * into high-level PS and clean out its TX queues.
120 * Make an exception if this is the only connected station. In this
121 * case FW-memory congestion is not a problem.
123 if (!single_sta
&& fw_ps
&& tx_pkts
>= WL1271_PS_STA_MAX_PACKETS
)
124 wl12xx_ps_link_start(wl
, wlvif
, hlid
, true);
127 bool wl12xx_is_dummy_packet(struct wl1271
*wl
, struct sk_buff
*skb
)
129 return wl
->dummy_packet
== skb
;
131 EXPORT_SYMBOL(wl12xx_is_dummy_packet
);
133 u8
wl12xx_tx_get_hlid_ap(struct wl1271
*wl
, struct wl12xx_vif
*wlvif
,
136 struct ieee80211_tx_info
*control
= IEEE80211_SKB_CB(skb
);
138 if (control
->control
.sta
) {
139 struct wl1271_station
*wl_sta
;
141 wl_sta
= (struct wl1271_station
*)
142 control
->control
.sta
->drv_priv
;
145 struct ieee80211_hdr
*hdr
;
147 if (!test_bit(WLVIF_FLAG_AP_STARTED
, &wlvif
->flags
))
148 return wl
->system_hlid
;
150 hdr
= (struct ieee80211_hdr
*)skb
->data
;
151 if (ieee80211_is_mgmt(hdr
->frame_control
))
152 return wlvif
->ap
.global_hlid
;
154 return wlvif
->ap
.bcast_hlid
;
158 u8
wl12xx_tx_get_hlid(struct wl1271
*wl
, struct wl12xx_vif
*wlvif
,
161 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)skb
->data
;
163 if (!wlvif
|| wl12xx_is_dummy_packet(wl
, skb
))
164 return wl
->system_hlid
;
166 if (wlvif
->bss_type
== BSS_TYPE_AP_BSS
)
167 return wl12xx_tx_get_hlid_ap(wl
, wlvif
, skb
);
169 if ((test_bit(WLVIF_FLAG_STA_ASSOCIATED
, &wlvif
->flags
) ||
170 test_bit(WLVIF_FLAG_IBSS_JOINED
, &wlvif
->flags
)) &&
171 !ieee80211_is_auth(hdr
->frame_control
) &&
172 !ieee80211_is_assoc_req(hdr
->frame_control
))
173 return wlvif
->sta
.hlid
;
175 return wlvif
->dev_hlid
;
178 unsigned int wlcore_calc_packet_alignment(struct wl1271
*wl
,
179 unsigned int packet_length
)
181 if (wl
->quirks
& WLCORE_QUIRK_TX_BLOCKSIZE_ALIGN
)
182 return ALIGN(packet_length
, WL12XX_BUS_BLOCK_SIZE
);
184 return ALIGN(packet_length
, WL1271_TX_ALIGN_TO
);
186 EXPORT_SYMBOL(wlcore_calc_packet_alignment
);
188 static int wl1271_tx_allocate(struct wl1271
*wl
, struct wl12xx_vif
*wlvif
,
189 struct sk_buff
*skb
, u32 extra
, u32 buf_offset
,
192 struct wl1271_tx_hw_descr
*desc
;
193 u32 total_len
= skb
->len
+ sizeof(struct wl1271_tx_hw_descr
) + extra
;
195 int id
, ret
= -EBUSY
, ac
;
196 u32 spare_blocks
= wl
->normal_tx_spare
;
197 bool is_dummy
= false;
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 if (unlikely(wl12xx_is_dummy_packet(wl
, skb
)))
209 else if (wlvif
->is_gem
)
210 spare_blocks
= wl
->gem_tx_spare
;
212 total_blocks
= wlcore_hw_calc_tx_blocks(wl
, total_len
, spare_blocks
);
214 if (total_blocks
<= wl
->tx_blocks_available
) {
215 desc
= (struct wl1271_tx_hw_descr
*)skb_push(
216 skb
, total_len
- skb
->len
);
218 wlcore_hw_set_tx_desc_blocks(wl
, desc
, total_blocks
,
223 wl
->tx_blocks_available
-= total_blocks
;
224 wl
->tx_allocated_blocks
+= total_blocks
;
226 /* If the FW was empty before, arm the Tx watchdog */
227 if (wl
->tx_allocated_blocks
== total_blocks
)
228 wl12xx_rearm_tx_watchdog_locked(wl
);
230 ac
= wl1271_tx_get_queue(skb_get_queue_mapping(skb
));
231 wl
->tx_allocated_pkts
[ac
]++;
233 if (!is_dummy
&& wlvif
&&
234 wlvif
->bss_type
== BSS_TYPE_AP_BSS
&&
235 test_bit(hlid
, wlvif
->ap
.sta_hlid_map
))
236 wl
->links
[hlid
].allocated_pkts
++;
240 wl1271_debug(DEBUG_TX
,
241 "tx_allocate: size: %d, blocks: %d, id: %d",
242 total_len
, total_blocks
, id
);
244 wl1271_free_tx_id(wl
, id
);
250 static void wl1271_tx_fill_hdr(struct wl1271
*wl
, struct wl12xx_vif
*wlvif
,
251 struct sk_buff
*skb
, u32 extra
,
252 struct ieee80211_tx_info
*control
, u8 hlid
)
255 struct wl1271_tx_hw_descr
*desc
;
259 __le16 frame_control
;
260 struct ieee80211_hdr
*hdr
;
264 desc
= (struct wl1271_tx_hw_descr
*) skb
->data
;
265 frame_start
= (u8
*)(desc
+ 1);
266 hdr
= (struct ieee80211_hdr
*)(frame_start
+ extra
);
267 frame_control
= hdr
->frame_control
;
269 /* relocate space for security header */
271 int hdrlen
= ieee80211_hdrlen(frame_control
);
272 memmove(frame_start
, hdr
, hdrlen
);
273 skb_set_network_header(skb
, skb_network_offset(skb
) + extra
);
276 /* configure packet life time */
278 hosttime
= (timespec_to_ns(&ts
) >> 10);
279 desc
->start_time
= cpu_to_le32(hosttime
- wl
->time_offset
);
281 is_dummy
= wl12xx_is_dummy_packet(wl
, skb
);
282 if (is_dummy
|| !wlvif
|| wlvif
->bss_type
!= BSS_TYPE_AP_BSS
)
283 desc
->life_time
= cpu_to_le16(TX_HW_MGMT_PKT_LIFETIME_TU
);
285 desc
->life_time
= cpu_to_le16(TX_HW_AP_MODE_PKT_LIFETIME_TU
);
288 ac
= wl1271_tx_get_queue(skb_get_queue_mapping(skb
));
289 desc
->tid
= skb
->priority
;
293 * FW expects the dummy packet to have an invalid session id -
294 * any session id that is different than the one set in the join
296 tx_attr
= (SESSION_COUNTER_INVALID
<<
297 TX_HW_ATTR_OFST_SESSION_COUNTER
) &
298 TX_HW_ATTR_SESSION_COUNTER
;
300 tx_attr
|= TX_HW_ATTR_TX_DUMMY_REQ
;
302 /* configure the tx attributes */
303 tx_attr
= wlvif
->session_counter
<<
304 TX_HW_ATTR_OFST_SESSION_COUNTER
;
308 if (is_dummy
|| !wlvif
)
310 else if (wlvif
->bss_type
!= BSS_TYPE_AP_BSS
) {
311 /* if the packets are destined for AP (have a STA entry)
312 send them with AP rate policies, otherwise use default
314 if (control
->flags
& IEEE80211_TX_CTL_NO_CCK_RATE
)
315 rate_idx
= wlvif
->sta
.p2p_rate_idx
;
316 else if (control
->control
.sta
)
317 rate_idx
= wlvif
->sta
.ap_rate_idx
;
319 rate_idx
= wlvif
->sta
.basic_rate_idx
;
321 if (hlid
== wlvif
->ap
.global_hlid
)
322 rate_idx
= wlvif
->ap
.mgmt_rate_idx
;
323 else if (hlid
== wlvif
->ap
.bcast_hlid
)
324 rate_idx
= wlvif
->ap
.bcast_rate_idx
;
326 rate_idx
= wlvif
->ap
.ucast_rate_idx
[ac
];
329 tx_attr
|= rate_idx
<< TX_HW_ATTR_OFST_RATE_POLICY
;
331 /* for WEP shared auth - no fw encryption is needed */
332 if (ieee80211_is_auth(frame_control
) &&
333 ieee80211_has_protected(frame_control
))
334 tx_attr
|= TX_HW_ATTR_HOST_ENCRYPT
;
336 desc
->tx_attr
= cpu_to_le16(tx_attr
);
338 wlcore_hw_set_tx_desc_csum(wl
, desc
, skb
);
339 wlcore_hw_set_tx_desc_data_len(wl
, desc
, skb
);
342 /* caller must hold wl->mutex */
343 static int wl1271_prepare_tx_frame(struct wl1271
*wl
, struct wl12xx_vif
*wlvif
,
344 struct sk_buff
*skb
, u32 buf_offset
)
346 struct ieee80211_tx_info
*info
;
356 info
= IEEE80211_SKB_CB(skb
);
358 /* TODO: handle dummy packets on multi-vifs */
359 is_dummy
= wl12xx_is_dummy_packet(wl
, skb
);
361 if (info
->control
.hw_key
&&
362 info
->control
.hw_key
->cipher
== WLAN_CIPHER_SUITE_TKIP
)
363 extra
= WL1271_EXTRA_SPACE_TKIP
;
365 if (info
->control
.hw_key
) {
367 u8 idx
= info
->control
.hw_key
->hw_key_idx
;
368 u32 cipher
= info
->control
.hw_key
->cipher
;
370 is_wep
= (cipher
== WLAN_CIPHER_SUITE_WEP40
) ||
371 (cipher
== WLAN_CIPHER_SUITE_WEP104
);
373 if (unlikely(is_wep
&& wlvif
->default_key
!= idx
)) {
374 ret
= wl1271_set_default_wep_key(wl
, wlvif
, idx
);
377 wlvif
->default_key
= idx
;
380 hlid
= wl12xx_tx_get_hlid(wl
, wlvif
, skb
);
381 if (hlid
== WL12XX_INVALID_LINK_ID
) {
382 wl1271_error("invalid hlid. dropping skb 0x%p", skb
);
386 ret
= wl1271_tx_allocate(wl
, wlvif
, skb
, extra
, buf_offset
, hlid
);
390 wl1271_tx_fill_hdr(wl
, wlvif
, skb
, extra
, info
, hlid
);
392 if (!is_dummy
&& wlvif
&& wlvif
->bss_type
== BSS_TYPE_AP_BSS
) {
393 wl1271_tx_ap_update_inconnection_sta(wl
, skb
);
394 wl1271_tx_regulate_link(wl
, wlvif
, hlid
);
398 * The length of each packet is stored in terms of
399 * words. Thus, we must pad the skb data to make sure its
400 * length is aligned. The number of padding bytes is computed
401 * and set in wl1271_tx_fill_hdr.
402 * In special cases, we want to align to a specific block size
403 * (eg. for wl128x with SDIO we align to 256).
405 total_len
= wlcore_calc_packet_alignment(wl
, skb
->len
);
407 memcpy(wl
->aggr_buf
+ buf_offset
, skb
->data
, skb
->len
);
408 memset(wl
->aggr_buf
+ buf_offset
+ skb
->len
, 0, total_len
- skb
->len
);
410 /* Revert side effects in the dummy packet skb, so it can be reused */
412 skb_pull(skb
, sizeof(struct wl1271_tx_hw_descr
));
417 u32
wl1271_tx_enabled_rates_get(struct wl1271
*wl
, u32 rate_set
,
418 enum ieee80211_band rate_band
)
420 struct ieee80211_supported_band
*band
;
421 u32 enabled_rates
= 0;
424 band
= wl
->hw
->wiphy
->bands
[rate_band
];
425 for (bit
= 0; bit
< band
->n_bitrates
; bit
++) {
427 enabled_rates
|= band
->bitrates
[bit
].hw_value
;
431 /* MCS rates indication are on bits 16 - 23 */
432 rate_set
>>= HW_HT_RATES_OFFSET
- band
->n_bitrates
;
434 for (bit
= 0; bit
< 8; bit
++) {
436 enabled_rates
|= (CONF_HW_BIT_RATE_MCS_0
<< bit
);
440 return enabled_rates
;
443 void wl1271_handle_tx_low_watermark(struct wl1271
*wl
)
448 for (i
= 0; i
< NUM_TX_QUEUES
; i
++) {
449 if (test_bit(i
, &wl
->stopped_queues_map
) &&
450 wl
->tx_queue_count
[i
] <= WL1271_TX_QUEUE_LOW_WATERMARK
) {
451 /* firmware buffer has space, restart queues */
452 spin_lock_irqsave(&wl
->wl_lock
, flags
);
453 ieee80211_wake_queue(wl
->hw
,
454 wl1271_tx_get_mac80211_queue(i
));
455 clear_bit(i
, &wl
->stopped_queues_map
);
456 spin_unlock_irqrestore(&wl
->wl_lock
, flags
);
461 static struct sk_buff_head
*wl1271_select_queue(struct wl1271
*wl
,
462 struct sk_buff_head
*queues
)
465 u32 min_pkts
= 0xffffffff;
468 * Find a non-empty ac where:
469 * 1. There are packets to transmit
470 * 2. The FW has the least allocated blocks
472 * We prioritize the ACs according to VO>VI>BE>BK
474 for (i
= 0; i
< NUM_TX_QUEUES
; i
++) {
475 ac
= wl1271_tx_get_queue(i
);
476 if (!skb_queue_empty(&queues
[ac
]) &&
477 (wl
->tx_allocated_pkts
[ac
] < min_pkts
)) {
479 min_pkts
= wl
->tx_allocated_pkts
[q
];
489 static struct sk_buff
*wl12xx_lnk_skb_dequeue(struct wl1271
*wl
,
490 struct wl1271_link
*lnk
)
494 struct sk_buff_head
*queue
;
496 queue
= wl1271_select_queue(wl
, lnk
->tx_queue
);
500 skb
= skb_dequeue(queue
);
502 int q
= wl1271_tx_get_queue(skb_get_queue_mapping(skb
));
503 spin_lock_irqsave(&wl
->wl_lock
, flags
);
504 WARN_ON_ONCE(wl
->tx_queue_count
[q
] <= 0);
505 wl
->tx_queue_count
[q
]--;
506 spin_unlock_irqrestore(&wl
->wl_lock
, flags
);
512 static struct sk_buff
*wl12xx_vif_skb_dequeue(struct wl1271
*wl
,
513 struct wl12xx_vif
*wlvif
)
515 struct sk_buff
*skb
= NULL
;
516 int i
, h
, start_hlid
;
518 /* start from the link after the last one */
519 start_hlid
= (wlvif
->last_tx_hlid
+ 1) % WL12XX_MAX_LINKS
;
521 /* dequeue according to AC, round robin on each link */
522 for (i
= 0; i
< WL12XX_MAX_LINKS
; i
++) {
523 h
= (start_hlid
+ i
) % WL12XX_MAX_LINKS
;
525 /* only consider connected stations */
526 if (!test_bit(h
, wlvif
->links_map
))
529 skb
= wl12xx_lnk_skb_dequeue(wl
, &wl
->links
[h
]);
533 wlvif
->last_tx_hlid
= h
;
538 wlvif
->last_tx_hlid
= 0;
543 static struct sk_buff
*wl1271_skb_dequeue(struct wl1271
*wl
)
546 struct wl12xx_vif
*wlvif
= wl
->last_wlvif
;
547 struct sk_buff
*skb
= NULL
;
549 /* continue from last wlvif (round robin) */
551 wl12xx_for_each_wlvif_continue(wl
, wlvif
) {
552 skb
= wl12xx_vif_skb_dequeue(wl
, wlvif
);
554 wl
->last_wlvif
= wlvif
;
560 /* dequeue from the system HLID before the restarting wlvif list */
562 skb
= wl12xx_lnk_skb_dequeue(wl
, &wl
->links
[wl
->system_hlid
]);
564 /* do a new pass over the wlvif list */
566 wl12xx_for_each_wlvif(wl
, wlvif
) {
567 skb
= wl12xx_vif_skb_dequeue(wl
, wlvif
);
569 wl
->last_wlvif
= wlvif
;
574 * No need to continue after last_wlvif. The previous
575 * pass should have found it.
577 if (wlvif
== wl
->last_wlvif
)
583 test_and_clear_bit(WL1271_FLAG_DUMMY_PACKET_PENDING
, &wl
->flags
)) {
586 skb
= wl
->dummy_packet
;
587 q
= wl1271_tx_get_queue(skb_get_queue_mapping(skb
));
588 spin_lock_irqsave(&wl
->wl_lock
, flags
);
589 WARN_ON_ONCE(wl
->tx_queue_count
[q
] <= 0);
590 wl
->tx_queue_count
[q
]--;
591 spin_unlock_irqrestore(&wl
->wl_lock
, flags
);
597 static void wl1271_skb_queue_head(struct wl1271
*wl
, struct wl12xx_vif
*wlvif
,
601 int q
= wl1271_tx_get_queue(skb_get_queue_mapping(skb
));
603 if (wl12xx_is_dummy_packet(wl
, skb
)) {
604 set_bit(WL1271_FLAG_DUMMY_PACKET_PENDING
, &wl
->flags
);
606 u8 hlid
= wl12xx_tx_get_hlid(wl
, wlvif
, skb
);
607 skb_queue_head(&wl
->links
[hlid
].tx_queue
[q
], skb
);
609 /* make sure we dequeue the same packet next time */
610 wlvif
->last_tx_hlid
= (hlid
+ WL12XX_MAX_LINKS
- 1) %
614 spin_lock_irqsave(&wl
->wl_lock
, flags
);
615 wl
->tx_queue_count
[q
]++;
616 spin_unlock_irqrestore(&wl
->wl_lock
, flags
);
619 static bool wl1271_tx_is_data_present(struct sk_buff
*skb
)
621 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)(skb
->data
);
623 return ieee80211_is_data_present(hdr
->frame_control
);
626 void wl12xx_rearm_rx_streaming(struct wl1271
*wl
, unsigned long *active_hlids
)
628 struct wl12xx_vif
*wlvif
;
632 if (!wl
->conf
.rx_streaming
.interval
)
635 if (!wl
->conf
.rx_streaming
.always
&&
636 !test_bit(WL1271_FLAG_SOFT_GEMINI
, &wl
->flags
))
639 timeout
= wl
->conf
.rx_streaming
.duration
;
640 wl12xx_for_each_wlvif_sta(wl
, wlvif
) {
642 for_each_set_bit(hlid
, active_hlids
, WL12XX_MAX_LINKS
) {
643 if (test_bit(hlid
, wlvif
->links_map
)) {
652 /* enable rx streaming */
653 if (!test_bit(WLVIF_FLAG_RX_STREAMING_STARTED
, &wlvif
->flags
))
654 ieee80211_queue_work(wl
->hw
,
655 &wlvif
->rx_streaming_enable_work
);
657 mod_timer(&wlvif
->rx_streaming_timer
,
658 jiffies
+ msecs_to_jiffies(timeout
));
662 void wl1271_tx_work_locked(struct wl1271
*wl
)
664 struct wl12xx_vif
*wlvif
;
666 struct wl1271_tx_hw_descr
*desc
;
668 bool sent_packets
= false;
669 unsigned long active_hlids
[BITS_TO_LONGS(WL12XX_MAX_LINKS
)] = {0};
672 if (unlikely(wl
->state
== WL1271_STATE_OFF
))
675 while ((skb
= wl1271_skb_dequeue(wl
))) {
676 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
677 bool has_data
= false;
680 if (!wl12xx_is_dummy_packet(wl
, skb
) && info
->control
.vif
)
681 wlvif
= wl12xx_vif_to_data(info
->control
.vif
);
683 has_data
= wlvif
&& wl1271_tx_is_data_present(skb
);
684 ret
= wl1271_prepare_tx_frame(wl
, wlvif
, skb
, buf_offset
);
685 if (ret
== -EAGAIN
) {
687 * Aggregation buffer is full.
688 * Flush buffer and try again.
690 wl1271_skb_queue_head(wl
, wlvif
, skb
);
691 wlcore_write_data(wl
, REG_SLV_MEM_DATA
, wl
->aggr_buf
,
696 } else if (ret
== -EBUSY
) {
698 * Firmware buffer is full.
699 * Queue back last skb, and stop aggregating.
701 wl1271_skb_queue_head(wl
, wlvif
, skb
);
702 /* No work left, avoid scheduling redundant tx work */
703 set_bit(WL1271_FLAG_FW_TX_BUSY
, &wl
->flags
);
705 } else if (ret
< 0) {
706 if (wl12xx_is_dummy_packet(wl
, skb
))
708 * fw still expects dummy packet,
711 wl1271_skb_queue_head(wl
, wlvif
, skb
);
713 ieee80211_free_txskb(wl
->hw
, skb
);
717 wl
->tx_packets_count
++;
719 desc
= (struct wl1271_tx_hw_descr
*) skb
->data
;
720 __set_bit(desc
->hlid
, active_hlids
);
726 wlcore_write_data(wl
, REG_SLV_MEM_DATA
, wl
->aggr_buf
,
732 * Interrupt the firmware with the new packets. This is only
733 * required for older hardware revisions
735 if (wl
->quirks
& WLCORE_QUIRK_END_OF_TRANSACTION
)
736 wl1271_write32(wl
, WL12XX_HOST_WR_ACCESS
,
737 wl
->tx_packets_count
);
739 wl1271_handle_tx_low_watermark(wl
);
741 wl12xx_rearm_rx_streaming(wl
, active_hlids
);
744 void wl1271_tx_work(struct work_struct
*work
)
746 struct wl1271
*wl
= container_of(work
, struct wl1271
, tx_work
);
749 mutex_lock(&wl
->mutex
);
750 ret
= wl1271_ps_elp_wakeup(wl
);
754 wl1271_tx_work_locked(wl
);
756 wl1271_ps_elp_sleep(wl
);
758 mutex_unlock(&wl
->mutex
);
761 static u8
wl1271_tx_get_rate_flags(u8 rate_class_index
)
766 * TODO: use wl12xx constants when this code is moved to wl12xx, as
767 * only it uses Tx-completion.
769 if (rate_class_index
<= 8)
770 flags
|= IEEE80211_TX_RC_MCS
;
773 * TODO: use wl12xx constants when this code is moved to wl12xx, as
774 * only it uses Tx-completion.
776 if (rate_class_index
== 0)
777 flags
|= IEEE80211_TX_RC_SHORT_GI
;
782 static void wl1271_tx_complete_packet(struct wl1271
*wl
,
783 struct wl1271_tx_hw_res_descr
*result
)
785 struct ieee80211_tx_info
*info
;
786 struct ieee80211_vif
*vif
;
787 struct wl12xx_vif
*wlvif
;
794 /* check for id legality */
795 if (unlikely(id
>= wl
->num_tx_desc
|| wl
->tx_frames
[id
] == NULL
)) {
796 wl1271_warning("TX result illegal id: %d", id
);
800 skb
= wl
->tx_frames
[id
];
801 info
= IEEE80211_SKB_CB(skb
);
803 if (wl12xx_is_dummy_packet(wl
, skb
)) {
804 wl1271_free_tx_id(wl
, id
);
808 /* info->control is valid as long as we don't update info->status */
809 vif
= info
->control
.vif
;
810 wlvif
= wl12xx_vif_to_data(vif
);
812 /* update the TX status info */
813 if (result
->status
== TX_SUCCESS
) {
814 if (!(info
->flags
& IEEE80211_TX_CTL_NO_ACK
))
815 info
->flags
|= IEEE80211_TX_STAT_ACK
;
816 rate
= wlcore_rate_to_idx(wl
, result
->rate_class_index
,
818 rate_flags
= wl1271_tx_get_rate_flags(result
->rate_class_index
);
819 retries
= result
->ack_failures
;
820 } else if (result
->status
== TX_RETRY_EXCEEDED
) {
821 wl
->stats
.excessive_retries
++;
822 retries
= result
->ack_failures
;
825 info
->status
.rates
[0].idx
= rate
;
826 info
->status
.rates
[0].count
= retries
;
827 info
->status
.rates
[0].flags
= rate_flags
;
828 info
->status
.ack_signal
= -1;
830 wl
->stats
.retry_count
+= result
->ack_failures
;
833 * update sequence number only when relevant, i.e. only in
834 * sessions of TKIP, AES and GEM (not in open or WEP sessions)
836 if (info
->control
.hw_key
&&
837 (info
->control
.hw_key
->cipher
== WLAN_CIPHER_SUITE_TKIP
||
838 info
->control
.hw_key
->cipher
== WLAN_CIPHER_SUITE_CCMP
||
839 info
->control
.hw_key
->cipher
== WL1271_CIPHER_SUITE_GEM
)) {
840 u8 fw_lsb
= result
->tx_security_sequence_number_lsb
;
841 u8 cur_lsb
= wlvif
->tx_security_last_seq_lsb
;
844 * update security sequence number, taking care of potential
847 wlvif
->tx_security_seq
+= (fw_lsb
- cur_lsb
) & 0xff;
848 wlvif
->tx_security_last_seq_lsb
= fw_lsb
;
851 /* remove private header from packet */
852 skb_pull(skb
, sizeof(struct wl1271_tx_hw_descr
));
854 /* remove TKIP header space if present */
855 if (info
->control
.hw_key
&&
856 info
->control
.hw_key
->cipher
== WLAN_CIPHER_SUITE_TKIP
) {
857 int hdrlen
= ieee80211_get_hdrlen_from_skb(skb
);
858 memmove(skb
->data
+ WL1271_EXTRA_SPACE_TKIP
, skb
->data
,
860 skb_pull(skb
, WL1271_EXTRA_SPACE_TKIP
);
863 wl1271_debug(DEBUG_TX
, "tx status id %u skb 0x%p failures %u rate 0x%x"
865 result
->id
, skb
, result
->ack_failures
,
866 result
->rate_class_index
, result
->status
);
868 /* return the packet to the stack */
869 skb_queue_tail(&wl
->deferred_tx_queue
, skb
);
870 queue_work(wl
->freezable_wq
, &wl
->netstack_work
);
871 wl1271_free_tx_id(wl
, result
->id
);
874 /* Called upon reception of a TX complete interrupt */
875 void wl1271_tx_complete(struct wl1271
*wl
)
877 struct wl1271_acx_mem_map
*memmap
=
878 (struct wl1271_acx_mem_map
*)wl
->target_mem_map
;
879 u32 count
, fw_counter
;
882 /* read the tx results from the chipset */
883 wl1271_read(wl
, le32_to_cpu(memmap
->tx_result
),
884 wl
->tx_res_if
, sizeof(*wl
->tx_res_if
), false);
885 fw_counter
= le32_to_cpu(wl
->tx_res_if
->tx_result_fw_counter
);
887 /* write host counter to chipset (to ack) */
888 wl1271_write32(wl
, le32_to_cpu(memmap
->tx_result
) +
889 offsetof(struct wl1271_tx_hw_res_if
,
890 tx_result_host_counter
), fw_counter
);
892 count
= fw_counter
- wl
->tx_results_count
;
893 wl1271_debug(DEBUG_TX
, "tx_complete received, packets: %d", count
);
895 /* verify that the result buffer is not getting overrun */
896 if (unlikely(count
> TX_HW_RESULT_QUEUE_LEN
))
897 wl1271_warning("TX result overflow from chipset: %d", count
);
899 /* process the results */
900 for (i
= 0; i
< count
; i
++) {
901 struct wl1271_tx_hw_res_descr
*result
;
902 u8 offset
= wl
->tx_results_count
& TX_HW_RESULT_QUEUE_LEN_MASK
;
904 /* process the packet */
905 result
= &(wl
->tx_res_if
->tx_results_queue
[offset
]);
906 wl1271_tx_complete_packet(wl
, result
);
908 wl
->tx_results_count
++;
911 EXPORT_SYMBOL(wl1271_tx_complete
);
913 void wl1271_tx_reset_link_queues(struct wl1271
*wl
, u8 hlid
)
918 struct ieee80211_tx_info
*info
;
919 int total
[NUM_TX_QUEUES
];
921 for (i
= 0; i
< NUM_TX_QUEUES
; i
++) {
923 while ((skb
= skb_dequeue(&wl
->links
[hlid
].tx_queue
[i
]))) {
924 wl1271_debug(DEBUG_TX
, "link freeing skb 0x%p", skb
);
926 if (!wl12xx_is_dummy_packet(wl
, skb
)) {
927 info
= IEEE80211_SKB_CB(skb
);
928 info
->status
.rates
[0].idx
= -1;
929 info
->status
.rates
[0].count
= 0;
930 ieee80211_tx_status_ni(wl
->hw
, skb
);
937 spin_lock_irqsave(&wl
->wl_lock
, flags
);
938 for (i
= 0; i
< NUM_TX_QUEUES
; i
++)
939 wl
->tx_queue_count
[i
] -= total
[i
];
940 spin_unlock_irqrestore(&wl
->wl_lock
, flags
);
942 wl1271_handle_tx_low_watermark(wl
);
945 /* caller must hold wl->mutex and TX must be stopped */
946 void wl12xx_tx_reset_wlvif(struct wl1271
*wl
, struct wl12xx_vif
*wlvif
)
951 for_each_set_bit(i
, wlvif
->links_map
, WL12XX_MAX_LINKS
) {
952 if (wlvif
->bss_type
== BSS_TYPE_AP_BSS
)
953 wl1271_free_sta(wl
, wlvif
, i
);
955 wlvif
->sta
.ba_rx_bitmap
= 0;
957 wl
->links
[i
].allocated_pkts
= 0;
958 wl
->links
[i
].prev_freed_pkts
= 0;
960 wlvif
->last_tx_hlid
= 0;
963 /* caller must hold wl->mutex and TX must be stopped */
964 void wl12xx_tx_reset(struct wl1271
*wl
, bool reset_tx_queues
)
968 struct ieee80211_tx_info
*info
;
970 /* only reset the queues if something bad happened */
971 if (WARN_ON_ONCE(wl1271_tx_total_queue_count(wl
) != 0)) {
972 for (i
= 0; i
< WL12XX_MAX_LINKS
; i
++)
973 wl1271_tx_reset_link_queues(wl
, i
);
975 for (i
= 0; i
< NUM_TX_QUEUES
; i
++)
976 wl
->tx_queue_count
[i
] = 0;
979 wl
->stopped_queues_map
= 0;
982 * Make sure the driver is at a consistent state, in case this
983 * function is called from a context other than interface removal.
984 * This call will always wake the TX queues.
987 wl1271_handle_tx_low_watermark(wl
);
989 for (i
= 0; i
< wl
->num_tx_desc
; i
++) {
990 if (wl
->tx_frames
[i
] == NULL
)
993 skb
= wl
->tx_frames
[i
];
994 wl1271_free_tx_id(wl
, i
);
995 wl1271_debug(DEBUG_TX
, "freeing skb 0x%p", skb
);
997 if (!wl12xx_is_dummy_packet(wl
, skb
)) {
999 * Remove private headers before passing the skb to
1002 info
= IEEE80211_SKB_CB(skb
);
1003 skb_pull(skb
, sizeof(struct wl1271_tx_hw_descr
));
1004 if (info
->control
.hw_key
&&
1005 info
->control
.hw_key
->cipher
==
1006 WLAN_CIPHER_SUITE_TKIP
) {
1007 int hdrlen
= ieee80211_get_hdrlen_from_skb(skb
);
1008 memmove(skb
->data
+ WL1271_EXTRA_SPACE_TKIP
,
1010 skb_pull(skb
, WL1271_EXTRA_SPACE_TKIP
);
1013 info
->status
.rates
[0].idx
= -1;
1014 info
->status
.rates
[0].count
= 0;
1016 ieee80211_tx_status_ni(wl
->hw
, skb
);
1021 #define WL1271_TX_FLUSH_TIMEOUT 500000
1023 /* caller must *NOT* hold wl->mutex */
1024 void wl1271_tx_flush(struct wl1271
*wl
)
1026 unsigned long timeout
;
1028 timeout
= jiffies
+ usecs_to_jiffies(WL1271_TX_FLUSH_TIMEOUT
);
1030 while (!time_after(jiffies
, timeout
)) {
1031 mutex_lock(&wl
->mutex
);
1032 wl1271_debug(DEBUG_TX
, "flushing tx buffer: %d %d",
1034 wl1271_tx_total_queue_count(wl
));
1035 if ((wl
->tx_frames_cnt
== 0) &&
1036 (wl1271_tx_total_queue_count(wl
) == 0)) {
1037 mutex_unlock(&wl
->mutex
);
1040 mutex_unlock(&wl
->mutex
);
1044 wl1271_warning("Unable to flush all TX buffers, timed out.");
1046 /* forcibly flush all Tx buffers on our queues */
1047 mutex_lock(&wl
->mutex
);
1048 for (i
= 0; i
< WL12XX_MAX_LINKS
; i
++)
1049 wl1271_tx_reset_link_queues(wl
, i
);
1050 mutex_unlock(&wl
->mutex
);
1053 u32
wl1271_tx_min_rate_get(struct wl1271
*wl
, u32 rate_set
)
1055 if (WARN_ON(!rate_set
))
1058 return BIT(__ffs(rate_set
));