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>
35 static int wl1271_set_default_wep_key(struct wl1271
*wl
,
36 struct wl12xx_vif
*wlvif
, u8 id
)
39 bool is_ap
= (wlvif
->bss_type
== BSS_TYPE_AP_BSS
);
42 ret
= wl12xx_cmd_set_default_wep_key(wl
, id
,
43 wlvif
->ap
.bcast_hlid
);
45 ret
= wl12xx_cmd_set_default_wep_key(wl
, id
, wlvif
->sta
.hlid
);
50 wl1271_debug(DEBUG_CRYPT
, "default wep key idx: %d", (int)id
);
54 static int wl1271_alloc_tx_id(struct wl1271
*wl
, struct sk_buff
*skb
)
58 id
= find_first_zero_bit(wl
->tx_frames_map
, ACX_TX_DESCRIPTORS
);
59 if (id
>= ACX_TX_DESCRIPTORS
)
62 __set_bit(id
, wl
->tx_frames_map
);
63 wl
->tx_frames
[id
] = skb
;
68 static void wl1271_free_tx_id(struct wl1271
*wl
, int id
)
70 if (__test_and_clear_bit(id
, wl
->tx_frames_map
)) {
71 if (unlikely(wl
->tx_frames_cnt
== ACX_TX_DESCRIPTORS
))
72 clear_bit(WL1271_FLAG_FW_TX_BUSY
, &wl
->flags
);
74 wl
->tx_frames
[id
] = NULL
;
79 static int wl1271_tx_update_filters(struct wl1271
*wl
,
80 struct wl12xx_vif
*wlvif
,
83 struct ieee80211_hdr
*hdr
;
86 hdr
= (struct ieee80211_hdr
*)skb
->data
;
89 * stop bssid-based filtering before transmitting authentication
90 * requests. this way the hw will never drop authentication
91 * responses coming from BSSIDs it isn't familiar with (e.g. on
94 if (!ieee80211_is_auth(hdr
->frame_control
))
97 if (wlvif
->dev_hlid
!= WL12XX_INVALID_LINK_ID
)
100 wl1271_debug(DEBUG_CMD
, "starting device role for roaming");
101 ret
= wl12xx_cmd_role_start_dev(wl
, wlvif
);
105 ret
= wl12xx_roc(wl
, wlvif
->dev_role_id
);
112 static void wl1271_tx_ap_update_inconnection_sta(struct wl1271
*wl
,
115 struct ieee80211_hdr
*hdr
;
118 * add the station to the known list before transmitting the
119 * authentication response. this way it won't get de-authed by FW
120 * when transmitting too soon.
122 hdr
= (struct ieee80211_hdr
*)(skb
->data
+
123 sizeof(struct wl1271_tx_hw_descr
));
124 if (ieee80211_is_auth(hdr
->frame_control
))
125 wl1271_acx_set_inconnection_sta(wl
, hdr
->addr1
);
128 static void wl1271_tx_regulate_link(struct wl1271
*wl
,
129 struct wl12xx_vif
*wlvif
,
132 bool fw_ps
, single_sta
;
135 if (WARN_ON(!test_bit(hlid
, wlvif
->links_map
)))
138 fw_ps
= test_bit(hlid
, (unsigned long *)&wl
->ap_fw_ps_map
);
139 tx_pkts
= wl
->links
[hlid
].allocated_pkts
;
140 single_sta
= (wl
->active_sta_count
== 1);
143 * if in FW PS and there is enough data in FW we can put the link
144 * into high-level PS and clean out its TX queues.
145 * Make an exception if this is the only connected station. In this
146 * case FW-memory congestion is not a problem.
148 if (!single_sta
&& fw_ps
&& tx_pkts
>= WL1271_PS_STA_MAX_PACKETS
)
149 wl1271_ps_link_start(wl
, hlid
, true);
152 bool wl12xx_is_dummy_packet(struct wl1271
*wl
, struct sk_buff
*skb
)
154 return wl
->dummy_packet
== skb
;
157 u8
wl12xx_tx_get_hlid_ap(struct wl1271
*wl
, struct wl12xx_vif
*wlvif
,
160 struct ieee80211_tx_info
*control
= IEEE80211_SKB_CB(skb
);
162 if (control
->control
.sta
) {
163 struct wl1271_station
*wl_sta
;
165 wl_sta
= (struct wl1271_station
*)
166 control
->control
.sta
->drv_priv
;
169 struct ieee80211_hdr
*hdr
;
171 if (!test_bit(WLVIF_FLAG_AP_STARTED
, &wlvif
->flags
))
172 return wl
->system_hlid
;
174 hdr
= (struct ieee80211_hdr
*)skb
->data
;
175 if (ieee80211_is_mgmt(hdr
->frame_control
))
176 return wlvif
->ap
.global_hlid
;
178 return wlvif
->ap
.bcast_hlid
;
182 u8
wl12xx_tx_get_hlid(struct wl1271
*wl
, struct wl12xx_vif
*wlvif
,
185 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)skb
->data
;
187 if (wl12xx_is_dummy_packet(wl
, skb
))
188 return wl
->system_hlid
;
190 if (wlvif
->bss_type
== BSS_TYPE_AP_BSS
)
191 return wl12xx_tx_get_hlid_ap(wl
, wlvif
, skb
);
193 wl1271_tx_update_filters(wl
, wlvif
, skb
);
195 if ((test_bit(WLVIF_FLAG_STA_ASSOCIATED
, &wlvif
->flags
) ||
196 test_bit(WLVIF_FLAG_IBSS_JOINED
, &wlvif
->flags
)) &&
197 !ieee80211_is_auth(hdr
->frame_control
) &&
198 !ieee80211_is_assoc_req(hdr
->frame_control
))
199 return wlvif
->sta
.hlid
;
201 return wlvif
->dev_hlid
;
204 static unsigned int wl12xx_calc_packet_alignment(struct wl1271
*wl
,
205 unsigned int packet_length
)
207 if (wl
->quirks
& WL12XX_QUIRK_BLOCKSIZE_ALIGNMENT
)
208 return ALIGN(packet_length
, WL12XX_BUS_BLOCK_SIZE
);
210 return ALIGN(packet_length
, WL1271_TX_ALIGN_TO
);
213 static int wl1271_tx_allocate(struct wl1271
*wl
, struct wl12xx_vif
*wlvif
,
214 struct sk_buff
*skb
, u32 extra
, u32 buf_offset
,
217 struct wl1271_tx_hw_descr
*desc
;
218 u32 total_len
= skb
->len
+ sizeof(struct wl1271_tx_hw_descr
) + extra
;
221 int id
, ret
= -EBUSY
, ac
;
222 u32 spare_blocks
= wl
->tx_spare_blocks
;
223 bool is_dummy
= false;
225 if (buf_offset
+ total_len
> WL1271_AGGR_BUFFER_SIZE
)
228 /* allocate free identifier for the packet */
229 id
= wl1271_alloc_tx_id(wl
, skb
);
233 /* approximate the number of blocks required for this packet
235 len
= wl12xx_calc_packet_alignment(wl
, total_len
);
237 /* in case of a dummy packet, use default amount of spare mem blocks */
238 if (unlikely(wl12xx_is_dummy_packet(wl
, skb
))) {
240 spare_blocks
= TX_HW_BLOCK_SPARE_DEFAULT
;
243 total_blocks
= (len
+ TX_HW_BLOCK_SIZE
- 1) / TX_HW_BLOCK_SIZE
+
246 if (total_blocks
<= wl
->tx_blocks_available
) {
247 desc
= (struct wl1271_tx_hw_descr
*)skb_push(
248 skb
, total_len
- skb
->len
);
250 /* HW descriptor fields change between wl127x and wl128x */
251 if (wl
->chip
.id
== CHIP_ID_1283_PG20
) {
252 desc
->wl128x_mem
.total_mem_blocks
= total_blocks
;
254 desc
->wl127x_mem
.extra_blocks
= spare_blocks
;
255 desc
->wl127x_mem
.total_mem_blocks
= total_blocks
;
260 wl
->tx_blocks_available
-= total_blocks
;
261 wl
->tx_allocated_blocks
+= total_blocks
;
263 ac
= wl1271_tx_get_queue(skb_get_queue_mapping(skb
));
264 wl
->tx_allocated_pkts
[ac
]++;
266 if (!is_dummy
&& wlvif
->bss_type
== BSS_TYPE_AP_BSS
&&
267 test_bit(hlid
, wlvif
->ap
.sta_hlid_map
))
268 wl
->links
[hlid
].allocated_pkts
++;
272 wl1271_debug(DEBUG_TX
,
273 "tx_allocate: size: %d, blocks: %d, id: %d",
274 total_len
, total_blocks
, id
);
276 wl1271_free_tx_id(wl
, id
);
282 static void wl1271_tx_fill_hdr(struct wl1271
*wl
, struct wl12xx_vif
*wlvif
,
283 struct sk_buff
*skb
, u32 extra
,
284 struct ieee80211_tx_info
*control
, u8 hlid
)
287 struct wl1271_tx_hw_descr
*desc
;
288 int aligned_len
, ac
, rate_idx
;
293 desc
= (struct wl1271_tx_hw_descr
*) skb
->data
;
295 /* relocate space for security header */
297 void *framestart
= skb
->data
+ sizeof(*desc
);
298 u16 fc
= *(u16
*)(framestart
+ extra
);
299 int hdrlen
= ieee80211_hdrlen(cpu_to_le16(fc
));
300 memmove(framestart
, framestart
+ extra
, hdrlen
);
303 /* configure packet life time */
305 hosttime
= (timespec_to_ns(&ts
) >> 10);
306 desc
->start_time
= cpu_to_le32(hosttime
- wl
->time_offset
);
308 is_dummy
= wl12xx_is_dummy_packet(wl
, skb
);
309 if (is_dummy
|| wlvif
->bss_type
!= BSS_TYPE_AP_BSS
)
310 desc
->life_time
= cpu_to_le16(TX_HW_MGMT_PKT_LIFETIME_TU
);
312 desc
->life_time
= cpu_to_le16(TX_HW_AP_MODE_PKT_LIFETIME_TU
);
315 ac
= wl1271_tx_get_queue(skb_get_queue_mapping(skb
));
316 desc
->tid
= skb
->priority
;
320 * FW expects the dummy packet to have an invalid session id -
321 * any session id that is different than the one set in the join
323 tx_attr
= (SESSION_COUNTER_INVALID
<<
324 TX_HW_ATTR_OFST_SESSION_COUNTER
) &
325 TX_HW_ATTR_SESSION_COUNTER
;
327 tx_attr
|= TX_HW_ATTR_TX_DUMMY_REQ
;
329 /* configure the tx attributes */
330 tx_attr
= wlvif
->session_counter
<<
331 TX_HW_ATTR_OFST_SESSION_COUNTER
;
337 else if (wlvif
->bss_type
!= BSS_TYPE_AP_BSS
) {
338 /* if the packets are destined for AP (have a STA entry)
339 send them with AP rate policies, otherwise use default
341 if (control
->control
.sta
)
342 rate_idx
= ACX_TX_AP_FULL_RATE
;
344 rate_idx
= ACX_TX_BASIC_RATE
;
346 if (hlid
== wlvif
->ap
.global_hlid
)
347 rate_idx
= ACX_TX_AP_MODE_MGMT_RATE
;
348 else if (hlid
== wlvif
->ap
.bcast_hlid
)
349 rate_idx
= ACX_TX_AP_MODE_BCST_RATE
;
354 tx_attr
|= rate_idx
<< TX_HW_ATTR_OFST_RATE_POLICY
;
357 aligned_len
= wl12xx_calc_packet_alignment(wl
, skb
->len
);
359 if (wl
->chip
.id
== CHIP_ID_1283_PG20
) {
360 desc
->wl128x_mem
.extra_bytes
= aligned_len
- skb
->len
;
361 desc
->length
= cpu_to_le16(aligned_len
>> 2);
363 wl1271_debug(DEBUG_TX
, "tx_fill_hdr: hlid: %d "
364 "tx_attr: 0x%x len: %d life: %d mem: %d",
366 le16_to_cpu(desc
->length
),
367 le16_to_cpu(desc
->life_time
),
368 desc
->wl128x_mem
.total_mem_blocks
);
372 /* Store the aligned length in terms of words */
373 desc
->length
= cpu_to_le16(aligned_len
>> 2);
375 /* calculate number of padding bytes */
376 pad
= aligned_len
- skb
->len
;
377 tx_attr
|= pad
<< TX_HW_ATTR_OFST_LAST_WORD_PAD
;
379 wl1271_debug(DEBUG_TX
, "tx_fill_hdr: pad: %d hlid: %d "
380 "tx_attr: 0x%x len: %d life: %d mem: %d", pad
,
382 le16_to_cpu(desc
->length
),
383 le16_to_cpu(desc
->life_time
),
384 desc
->wl127x_mem
.total_mem_blocks
);
387 desc
->tx_attr
= cpu_to_le16(tx_attr
);
390 /* caller must hold wl->mutex */
391 static int wl1271_prepare_tx_frame(struct wl1271
*wl
, struct wl12xx_vif
*wlvif
,
392 struct sk_buff
*skb
, u32 buf_offset
)
394 struct ieee80211_tx_info
*info
;
404 info
= IEEE80211_SKB_CB(skb
);
406 /* TODO: handle dummy packets on multi-vifs */
407 is_dummy
= wl12xx_is_dummy_packet(wl
, skb
);
409 if (info
->control
.hw_key
&&
410 info
->control
.hw_key
->cipher
== WLAN_CIPHER_SUITE_TKIP
)
411 extra
= WL1271_TKIP_IV_SPACE
;
413 if (info
->control
.hw_key
) {
415 u8 idx
= info
->control
.hw_key
->hw_key_idx
;
416 u32 cipher
= info
->control
.hw_key
->cipher
;
418 is_wep
= (cipher
== WLAN_CIPHER_SUITE_WEP40
) ||
419 (cipher
== WLAN_CIPHER_SUITE_WEP104
);
421 if (unlikely(is_wep
&& wlvif
->default_key
!= idx
)) {
422 ret
= wl1271_set_default_wep_key(wl
, wlvif
, idx
);
425 wlvif
->default_key
= idx
;
428 hlid
= wl12xx_tx_get_hlid(wl
, wlvif
, skb
);
429 if (hlid
== WL12XX_INVALID_LINK_ID
) {
430 wl1271_error("invalid hlid. dropping skb 0x%p", skb
);
434 ret
= wl1271_tx_allocate(wl
, wlvif
, skb
, extra
, buf_offset
, hlid
);
438 wl1271_tx_fill_hdr(wl
, wlvif
, skb
, extra
, info
, hlid
);
440 if (!is_dummy
&& wlvif
->bss_type
== BSS_TYPE_AP_BSS
) {
441 wl1271_tx_ap_update_inconnection_sta(wl
, skb
);
442 wl1271_tx_regulate_link(wl
, wlvif
, hlid
);
446 * The length of each packet is stored in terms of
447 * words. Thus, we must pad the skb data to make sure its
448 * length is aligned. The number of padding bytes is computed
449 * and set in wl1271_tx_fill_hdr.
450 * In special cases, we want to align to a specific block size
451 * (eg. for wl128x with SDIO we align to 256).
453 total_len
= wl12xx_calc_packet_alignment(wl
, skb
->len
);
455 memcpy(wl
->aggr_buf
+ buf_offset
, skb
->data
, skb
->len
);
456 memset(wl
->aggr_buf
+ buf_offset
+ skb
->len
, 0, total_len
- skb
->len
);
458 /* Revert side effects in the dummy packet skb, so it can be reused */
460 skb_pull(skb
, sizeof(struct wl1271_tx_hw_descr
));
465 u32
wl1271_tx_enabled_rates_get(struct wl1271
*wl
, u32 rate_set
,
466 enum ieee80211_band rate_band
)
468 struct ieee80211_supported_band
*band
;
469 u32 enabled_rates
= 0;
472 band
= wl
->hw
->wiphy
->bands
[rate_band
];
473 for (bit
= 0; bit
< band
->n_bitrates
; bit
++) {
475 enabled_rates
|= band
->bitrates
[bit
].hw_value
;
479 /* MCS rates indication are on bits 16 - 23 */
480 rate_set
>>= HW_HT_RATES_OFFSET
- band
->n_bitrates
;
482 for (bit
= 0; bit
< 8; bit
++) {
484 enabled_rates
|= (CONF_HW_BIT_RATE_MCS_0
<< bit
);
488 return enabled_rates
;
491 void wl1271_handle_tx_low_watermark(struct wl1271
*wl
)
496 for (i
= 0; i
< NUM_TX_QUEUES
; i
++) {
497 if (test_bit(i
, &wl
->stopped_queues_map
) &&
498 wl
->tx_queue_count
[i
] <= WL1271_TX_QUEUE_LOW_WATERMARK
) {
499 /* firmware buffer has space, restart queues */
500 spin_lock_irqsave(&wl
->wl_lock
, flags
);
501 ieee80211_wake_queue(wl
->hw
,
502 wl1271_tx_get_mac80211_queue(i
));
503 clear_bit(i
, &wl
->stopped_queues_map
);
504 spin_unlock_irqrestore(&wl
->wl_lock
, flags
);
509 static struct sk_buff_head
*wl1271_select_queue(struct wl1271
*wl
,
510 struct sk_buff_head
*queues
)
513 u32 min_pkts
= 0xffffffff;
516 * Find a non-empty ac where:
517 * 1. There are packets to transmit
518 * 2. The FW has the least allocated blocks
520 * We prioritize the ACs according to VO>VI>BE>BK
522 for (i
= 0; i
< NUM_TX_QUEUES
; i
++) {
523 ac
= wl1271_tx_get_queue(i
);
524 if (!skb_queue_empty(&queues
[ac
]) &&
525 (wl
->tx_allocated_pkts
[ac
] < min_pkts
)) {
527 min_pkts
= wl
->tx_allocated_pkts
[q
];
537 static struct sk_buff
*wl12xx_lnk_skb_dequeue(struct wl1271
*wl
,
538 struct wl1271_link
*lnk
)
542 struct sk_buff_head
*queue
;
544 queue
= wl1271_select_queue(wl
, lnk
->tx_queue
);
548 skb
= skb_dequeue(queue
);
550 int q
= wl1271_tx_get_queue(skb_get_queue_mapping(skb
));
551 spin_lock_irqsave(&wl
->wl_lock
, flags
);
552 wl
->tx_queue_count
[q
]--;
553 spin_unlock_irqrestore(&wl
->wl_lock
, flags
);
559 static struct sk_buff
*wl12xx_vif_skb_dequeue(struct wl1271
*wl
,
560 struct wl12xx_vif
*wlvif
)
562 struct sk_buff
*skb
= NULL
;
563 int i
, h
, start_hlid
;
565 /* start from the link after the last one */
566 start_hlid
= (wlvif
->last_tx_hlid
+ 1) % WL12XX_MAX_LINKS
;
568 /* dequeue according to AC, round robin on each link */
569 for (i
= 0; i
< WL12XX_MAX_LINKS
; i
++) {
570 h
= (start_hlid
+ i
) % WL12XX_MAX_LINKS
;
572 /* only consider connected stations */
573 if (!test_bit(h
, wlvif
->links_map
))
576 skb
= wl12xx_lnk_skb_dequeue(wl
, &wl
->links
[h
]);
580 wlvif
->last_tx_hlid
= h
;
585 wlvif
->last_tx_hlid
= 0;
590 static struct sk_buff
*wl1271_skb_dequeue(struct wl1271
*wl
)
593 struct wl12xx_vif
*wlvif
;
594 struct sk_buff
*skb
= NULL
;
596 /* TODO: rememeber last vif and consider it */
597 wl12xx_for_each_wlvif(wl
, wlvif
) {
598 skb
= wl12xx_vif_skb_dequeue(wl
, wlvif
);
604 test_and_clear_bit(WL1271_FLAG_DUMMY_PACKET_PENDING
, &wl
->flags
)) {
607 skb
= wl
->dummy_packet
;
608 q
= wl1271_tx_get_queue(skb_get_queue_mapping(skb
));
609 spin_lock_irqsave(&wl
->wl_lock
, flags
);
610 wl
->tx_queue_count
[q
]--;
611 spin_unlock_irqrestore(&wl
->wl_lock
, flags
);
617 static void wl1271_skb_queue_head(struct wl1271
*wl
, struct wl12xx_vif
*wlvif
,
621 int q
= wl1271_tx_get_queue(skb_get_queue_mapping(skb
));
623 if (wl12xx_is_dummy_packet(wl
, skb
)) {
624 set_bit(WL1271_FLAG_DUMMY_PACKET_PENDING
, &wl
->flags
);
626 u8 hlid
= wl12xx_tx_get_hlid(wl
, wlvif
, skb
);
627 skb_queue_head(&wl
->links
[hlid
].tx_queue
[q
], skb
);
629 /* make sure we dequeue the same packet next time */
630 wlvif
->last_tx_hlid
= (hlid
+ WL12XX_MAX_LINKS
- 1) %
634 spin_lock_irqsave(&wl
->wl_lock
, flags
);
635 wl
->tx_queue_count
[q
]++;
636 spin_unlock_irqrestore(&wl
->wl_lock
, flags
);
639 static bool wl1271_tx_is_data_present(struct sk_buff
*skb
)
641 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)(skb
->data
);
643 return ieee80211_is_data_present(hdr
->frame_control
);
646 void wl12xx_rearm_rx_streaming(struct wl1271
*wl
, unsigned long *active_hlids
)
648 struct wl12xx_vif
*wlvif
;
652 if (!wl
->conf
.rx_streaming
.interval
)
655 if (!wl
->conf
.rx_streaming
.always
&&
656 !test_bit(WL1271_FLAG_SOFT_GEMINI
, &wl
->flags
))
659 timeout
= wl
->conf
.rx_streaming
.duration
;
660 wl12xx_for_each_wlvif_sta(wl
, wlvif
) {
662 for_each_set_bit(hlid
, active_hlids
, WL12XX_MAX_LINKS
) {
663 if (test_bit(hlid
, wlvif
->links_map
)) {
672 /* enable rx streaming */
673 if (!test_bit(WL1271_FLAG_RX_STREAMING_STARTED
, &wl
->flags
))
674 ieee80211_queue_work(wl
->hw
,
675 &wlvif
->rx_streaming_enable_work
);
677 mod_timer(&wlvif
->rx_streaming_timer
,
678 jiffies
+ msecs_to_jiffies(timeout
));
682 void wl1271_tx_work_locked(struct wl1271
*wl
)
684 struct wl12xx_vif
*wlvif
;
686 struct wl1271_tx_hw_descr
*desc
;
688 bool sent_packets
= false;
689 unsigned long active_hlids
[BITS_TO_LONGS(WL12XX_MAX_LINKS
)] = {0};
692 if (unlikely(wl
->state
== WL1271_STATE_OFF
))
695 while ((skb
= wl1271_skb_dequeue(wl
))) {
696 bool has_data
= false;
699 if (!wl12xx_is_dummy_packet(wl
, skb
)) {
700 struct ieee80211_tx_info
*info
;
701 struct ieee80211_vif
*vif
;
703 info
= IEEE80211_SKB_CB(skb
);
704 vif
= info
->control
.vif
;
705 wlvif
= wl12xx_vif_to_data(vif
);
707 has_data
= wlvif
&& wl1271_tx_is_data_present(skb
);
709 ret
= wl1271_prepare_tx_frame(wl
, wlvif
, skb
, buf_offset
);
710 if (ret
== -EAGAIN
) {
712 * Aggregation buffer is full.
713 * Flush buffer and try again.
715 wl1271_skb_queue_head(wl
, wlvif
, skb
);
716 wl1271_write(wl
, WL1271_SLV_MEM_DATA
, wl
->aggr_buf
,
721 } else if (ret
== -EBUSY
) {
723 * Firmware buffer is full.
724 * Queue back last skb, and stop aggregating.
726 wl1271_skb_queue_head(wl
, wlvif
, skb
);
727 /* No work left, avoid scheduling redundant tx work */
728 set_bit(WL1271_FLAG_FW_TX_BUSY
, &wl
->flags
);
730 } else if (ret
< 0) {
735 wl
->tx_packets_count
++;
737 desc
= (struct wl1271_tx_hw_descr
*) skb
->data
;
738 __set_bit(desc
->hlid
, active_hlids
);
744 wl1271_write(wl
, WL1271_SLV_MEM_DATA
, wl
->aggr_buf
,
750 * Interrupt the firmware with the new packets. This is only
751 * required for older hardware revisions
753 if (wl
->quirks
& WL12XX_QUIRK_END_OF_TRANSACTION
)
754 wl1271_write32(wl
, WL1271_HOST_WR_ACCESS
,
755 wl
->tx_packets_count
);
757 wl1271_handle_tx_low_watermark(wl
);
759 wl12xx_rearm_rx_streaming(wl
, active_hlids
);
762 void wl1271_tx_work(struct work_struct
*work
)
764 struct wl1271
*wl
= container_of(work
, struct wl1271
, tx_work
);
767 mutex_lock(&wl
->mutex
);
768 ret
= wl1271_ps_elp_wakeup(wl
);
772 wl1271_tx_work_locked(wl
);
774 wl1271_ps_elp_sleep(wl
);
776 mutex_unlock(&wl
->mutex
);
779 static void wl1271_tx_complete_packet(struct wl1271
*wl
,
780 struct wl1271_tx_hw_res_descr
*result
)
782 struct ieee80211_tx_info
*info
;
783 struct ieee80211_vif
*vif
;
784 struct wl12xx_vif
*wlvif
;
790 /* check for id legality */
791 if (unlikely(id
>= ACX_TX_DESCRIPTORS
|| wl
->tx_frames
[id
] == NULL
)) {
792 wl1271_warning("TX result illegal id: %d", id
);
796 skb
= wl
->tx_frames
[id
];
797 info
= IEEE80211_SKB_CB(skb
);
799 if (wl12xx_is_dummy_packet(wl
, skb
)) {
800 wl1271_free_tx_id(wl
, id
);
804 /* info->control is valid as long as we don't update info->status */
805 vif
= info
->control
.vif
;
806 wlvif
= wl12xx_vif_to_data(vif
);
808 /* update the TX status info */
809 if (result
->status
== TX_SUCCESS
) {
810 if (!(info
->flags
& IEEE80211_TX_CTL_NO_ACK
))
811 info
->flags
|= IEEE80211_TX_STAT_ACK
;
812 rate
= wl1271_rate_to_idx(result
->rate_class_index
, wl
->band
);
813 retries
= result
->ack_failures
;
814 } else if (result
->status
== TX_RETRY_EXCEEDED
) {
815 wl
->stats
.excessive_retries
++;
816 retries
= result
->ack_failures
;
819 info
->status
.rates
[0].idx
= rate
;
820 info
->status
.rates
[0].count
= retries
;
821 info
->status
.rates
[0].flags
= 0;
822 info
->status
.ack_signal
= -1;
824 wl
->stats
.retry_count
+= result
->ack_failures
;
827 * update sequence number only when relevant, i.e. only in
828 * sessions of TKIP, AES and GEM (not in open or WEP sessions)
830 if (info
->control
.hw_key
&&
831 (info
->control
.hw_key
->cipher
== WLAN_CIPHER_SUITE_TKIP
||
832 info
->control
.hw_key
->cipher
== WLAN_CIPHER_SUITE_CCMP
||
833 info
->control
.hw_key
->cipher
== WL1271_CIPHER_SUITE_GEM
)) {
834 u8 fw_lsb
= result
->tx_security_sequence_number_lsb
;
835 u8 cur_lsb
= wlvif
->tx_security_last_seq_lsb
;
838 * update security sequence number, taking care of potential
841 wlvif
->tx_security_seq
+= (fw_lsb
- cur_lsb
) & 0xff;
842 wlvif
->tx_security_last_seq_lsb
= fw_lsb
;
845 /* remove private header from packet */
846 skb_pull(skb
, sizeof(struct wl1271_tx_hw_descr
));
848 /* remove TKIP header space if present */
849 if (info
->control
.hw_key
&&
850 info
->control
.hw_key
->cipher
== WLAN_CIPHER_SUITE_TKIP
) {
851 int hdrlen
= ieee80211_get_hdrlen_from_skb(skb
);
852 memmove(skb
->data
+ WL1271_TKIP_IV_SPACE
, skb
->data
, hdrlen
);
853 skb_pull(skb
, WL1271_TKIP_IV_SPACE
);
856 wl1271_debug(DEBUG_TX
, "tx status id %u skb 0x%p failures %u rate 0x%x"
858 result
->id
, skb
, result
->ack_failures
,
859 result
->rate_class_index
, result
->status
);
861 /* return the packet to the stack */
862 skb_queue_tail(&wl
->deferred_tx_queue
, skb
);
863 queue_work(wl
->freezable_wq
, &wl
->netstack_work
);
864 wl1271_free_tx_id(wl
, result
->id
);
867 /* Called upon reception of a TX complete interrupt */
868 void wl1271_tx_complete(struct wl1271
*wl
)
870 struct wl1271_acx_mem_map
*memmap
=
871 (struct wl1271_acx_mem_map
*)wl
->target_mem_map
;
872 u32 count
, fw_counter
;
875 /* read the tx results from the chipset */
876 wl1271_read(wl
, le32_to_cpu(memmap
->tx_result
),
877 wl
->tx_res_if
, sizeof(*wl
->tx_res_if
), false);
878 fw_counter
= le32_to_cpu(wl
->tx_res_if
->tx_result_fw_counter
);
880 /* write host counter to chipset (to ack) */
881 wl1271_write32(wl
, le32_to_cpu(memmap
->tx_result
) +
882 offsetof(struct wl1271_tx_hw_res_if
,
883 tx_result_host_counter
), fw_counter
);
885 count
= fw_counter
- wl
->tx_results_count
;
886 wl1271_debug(DEBUG_TX
, "tx_complete received, packets: %d", count
);
888 /* verify that the result buffer is not getting overrun */
889 if (unlikely(count
> TX_HW_RESULT_QUEUE_LEN
))
890 wl1271_warning("TX result overflow from chipset: %d", count
);
892 /* process the results */
893 for (i
= 0; i
< count
; i
++) {
894 struct wl1271_tx_hw_res_descr
*result
;
895 u8 offset
= wl
->tx_results_count
& TX_HW_RESULT_QUEUE_LEN_MASK
;
897 /* process the packet */
898 result
= &(wl
->tx_res_if
->tx_results_queue
[offset
]);
899 wl1271_tx_complete_packet(wl
, result
);
901 wl
->tx_results_count
++;
905 void wl1271_tx_reset_link_queues(struct wl1271
*wl
, u8 hlid
)
910 struct ieee80211_tx_info
*info
;
911 int total
[NUM_TX_QUEUES
];
913 for (i
= 0; i
< NUM_TX_QUEUES
; i
++) {
915 while ((skb
= skb_dequeue(&wl
->links
[hlid
].tx_queue
[i
]))) {
916 wl1271_debug(DEBUG_TX
, "link freeing skb 0x%p", skb
);
918 if (!wl12xx_is_dummy_packet(wl
, skb
)) {
919 info
= IEEE80211_SKB_CB(skb
);
920 info
->status
.rates
[0].idx
= -1;
921 info
->status
.rates
[0].count
= 0;
922 ieee80211_tx_status_ni(wl
->hw
, skb
);
929 spin_lock_irqsave(&wl
->wl_lock
, flags
);
930 for (i
= 0; i
< NUM_TX_QUEUES
; i
++)
931 wl
->tx_queue_count
[i
] -= total
[i
];
932 spin_unlock_irqrestore(&wl
->wl_lock
, flags
);
934 wl1271_handle_tx_low_watermark(wl
);
937 /* caller must hold wl->mutex and TX must be stopped */
938 void wl12xx_tx_reset_wlvif(struct wl1271
*wl
, struct wl12xx_vif
*wlvif
)
943 for_each_set_bit(i
, wlvif
->links_map
, WL12XX_MAX_LINKS
) {
944 if (wlvif
->bss_type
== BSS_TYPE_AP_BSS
)
945 wl1271_free_sta(wl
, wlvif
, i
);
947 wlvif
->sta
.ba_rx_bitmap
= 0;
949 wl1271_tx_reset_link_queues(wl
, i
);
950 wl
->links
[i
].allocated_pkts
= 0;
951 wl
->links
[i
].prev_freed_pkts
= 0;
953 wlvif
->last_tx_hlid
= 0;
956 /* caller must hold wl->mutex and TX must be stopped */
957 void wl12xx_tx_reset(struct wl1271
*wl
, bool reset_tx_queues
)
961 struct ieee80211_tx_info
*info
;
963 for (i
= 0; i
< NUM_TX_QUEUES
; i
++)
964 wl
->tx_queue_count
[i
] = 0;
966 wl
->stopped_queues_map
= 0;
969 * Make sure the driver is at a consistent state, in case this
970 * function is called from a context other than interface removal.
971 * This call will always wake the TX queues.
974 wl1271_handle_tx_low_watermark(wl
);
976 for (i
= 0; i
< ACX_TX_DESCRIPTORS
; i
++) {
977 if (wl
->tx_frames
[i
] == NULL
)
980 skb
= wl
->tx_frames
[i
];
981 wl1271_free_tx_id(wl
, i
);
982 wl1271_debug(DEBUG_TX
, "freeing skb 0x%p", skb
);
984 if (!wl12xx_is_dummy_packet(wl
, skb
)) {
986 * Remove private headers before passing the skb to
989 info
= IEEE80211_SKB_CB(skb
);
990 skb_pull(skb
, sizeof(struct wl1271_tx_hw_descr
));
991 if (info
->control
.hw_key
&&
992 info
->control
.hw_key
->cipher
==
993 WLAN_CIPHER_SUITE_TKIP
) {
994 int hdrlen
= ieee80211_get_hdrlen_from_skb(skb
);
995 memmove(skb
->data
+ WL1271_TKIP_IV_SPACE
,
997 skb_pull(skb
, WL1271_TKIP_IV_SPACE
);
1000 info
->status
.rates
[0].idx
= -1;
1001 info
->status
.rates
[0].count
= 0;
1003 ieee80211_tx_status_ni(wl
->hw
, skb
);
1008 #define WL1271_TX_FLUSH_TIMEOUT 500000
1010 /* caller must *NOT* hold wl->mutex */
1011 void wl1271_tx_flush(struct wl1271
*wl
)
1013 unsigned long timeout
;
1014 timeout
= jiffies
+ usecs_to_jiffies(WL1271_TX_FLUSH_TIMEOUT
);
1016 while (!time_after(jiffies
, timeout
)) {
1017 mutex_lock(&wl
->mutex
);
1018 wl1271_debug(DEBUG_TX
, "flushing tx buffer: %d %d",
1020 wl1271_tx_total_queue_count(wl
));
1021 if ((wl
->tx_frames_cnt
== 0) &&
1022 (wl1271_tx_total_queue_count(wl
) == 0)) {
1023 mutex_unlock(&wl
->mutex
);
1026 mutex_unlock(&wl
->mutex
);
1030 wl1271_warning("Unable to flush all TX buffers, timed out.");
1033 u32
wl1271_tx_min_rate_get(struct wl1271
*wl
, u32 rate_set
)
1035 if (WARN_ON(!rate_set
))
1038 return BIT(__ffs(rate_set
));