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 static 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
;
86 static void wl1271_tx_ap_update_inconnection_sta(struct wl1271
*wl
,
89 struct ieee80211_hdr
*hdr
;
92 * add the station to the known list before transmitting the
93 * authentication response. this way it won't get de-authed by FW
94 * when transmitting too soon.
96 hdr
= (struct ieee80211_hdr
*)(skb
->data
+
97 sizeof(struct wl1271_tx_hw_descr
));
98 if (ieee80211_is_auth(hdr
->frame_control
))
99 wl1271_acx_set_inconnection_sta(wl
, hdr
->addr1
);
102 static void wl1271_tx_regulate_link(struct wl1271
*wl
,
103 struct wl12xx_vif
*wlvif
,
106 bool fw_ps
, single_sta
;
109 if (WARN_ON(!test_bit(hlid
, wlvif
->links_map
)))
112 fw_ps
= test_bit(hlid
, (unsigned long *)&wl
->ap_fw_ps_map
);
113 tx_pkts
= wl
->links
[hlid
].allocated_pkts
;
114 single_sta
= (wl
->active_sta_count
== 1);
117 * if in FW PS and there is enough data in FW we can put the link
118 * into high-level PS and clean out its TX queues.
119 * Make an exception if this is the only connected station. In this
120 * case FW-memory congestion is not a problem.
122 if (!single_sta
&& fw_ps
&& tx_pkts
>= WL1271_PS_STA_MAX_PACKETS
)
123 wl12xx_ps_link_start(wl
, wlvif
, hlid
, true);
126 bool wl12xx_is_dummy_packet(struct wl1271
*wl
, struct sk_buff
*skb
)
128 return wl
->dummy_packet
== skb
;
131 u8
wl12xx_tx_get_hlid_ap(struct wl1271
*wl
, struct wl12xx_vif
*wlvif
,
134 struct ieee80211_tx_info
*control
= IEEE80211_SKB_CB(skb
);
136 if (control
->control
.sta
) {
137 struct wl1271_station
*wl_sta
;
139 wl_sta
= (struct wl1271_station
*)
140 control
->control
.sta
->drv_priv
;
143 struct ieee80211_hdr
*hdr
;
145 if (!test_bit(WLVIF_FLAG_AP_STARTED
, &wlvif
->flags
))
146 return wl
->system_hlid
;
148 hdr
= (struct ieee80211_hdr
*)skb
->data
;
149 if (ieee80211_is_mgmt(hdr
->frame_control
))
150 return wlvif
->ap
.global_hlid
;
152 return wlvif
->ap
.bcast_hlid
;
156 u8
wl12xx_tx_get_hlid(struct wl1271
*wl
, struct wl12xx_vif
*wlvif
,
159 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)skb
->data
;
161 if (!wlvif
|| wl12xx_is_dummy_packet(wl
, skb
))
162 return wl
->system_hlid
;
164 if (wlvif
->bss_type
== BSS_TYPE_AP_BSS
)
165 return wl12xx_tx_get_hlid_ap(wl
, wlvif
, skb
);
167 if ((test_bit(WLVIF_FLAG_STA_ASSOCIATED
, &wlvif
->flags
) ||
168 test_bit(WLVIF_FLAG_IBSS_JOINED
, &wlvif
->flags
)) &&
169 !ieee80211_is_auth(hdr
->frame_control
) &&
170 !ieee80211_is_assoc_req(hdr
->frame_control
))
171 return wlvif
->sta
.hlid
;
173 return wlvif
->dev_hlid
;
176 unsigned int wlcore_calc_packet_alignment(struct wl1271
*wl
,
177 unsigned int packet_length
)
179 if (wl
->quirks
& WLCORE_QUIRK_TX_BLOCKSIZE_ALIGN
)
180 return ALIGN(packet_length
, WL12XX_BUS_BLOCK_SIZE
);
182 return ALIGN(packet_length
, WL1271_TX_ALIGN_TO
);
184 EXPORT_SYMBOL(wlcore_calc_packet_alignment
);
186 static int wl1271_tx_allocate(struct wl1271
*wl
, struct wl12xx_vif
*wlvif
,
187 struct sk_buff
*skb
, u32 extra
, u32 buf_offset
,
190 struct wl1271_tx_hw_descr
*desc
;
191 u32 total_len
= skb
->len
+ sizeof(struct wl1271_tx_hw_descr
) + extra
;
193 int id
, ret
= -EBUSY
, ac
;
194 u32 spare_blocks
= wl
->normal_tx_spare
;
195 bool is_dummy
= false;
197 if (buf_offset
+ total_len
> WL1271_AGGR_BUFFER_SIZE
)
200 /* allocate free identifier for the packet */
201 id
= wl1271_alloc_tx_id(wl
, skb
);
205 if (unlikely(wl12xx_is_dummy_packet(wl
, skb
)))
207 else if (wlvif
->is_gem
)
208 spare_blocks
= wl
->gem_tx_spare
;
210 total_blocks
= wlcore_hw_calc_tx_blocks(wl
, total_len
, spare_blocks
);
212 if (total_blocks
<= wl
->tx_blocks_available
) {
213 desc
= (struct wl1271_tx_hw_descr
*)skb_push(
214 skb
, total_len
- skb
->len
);
216 wlcore_hw_set_tx_desc_blocks(wl
, desc
, total_blocks
,
221 wl
->tx_blocks_available
-= total_blocks
;
222 wl
->tx_allocated_blocks
+= total_blocks
;
224 /* If the FW was empty before, arm the Tx watchdog */
225 if (wl
->tx_allocated_blocks
== total_blocks
)
226 wl12xx_rearm_tx_watchdog_locked(wl
);
228 ac
= wl1271_tx_get_queue(skb_get_queue_mapping(skb
));
229 wl
->tx_allocated_pkts
[ac
]++;
231 if (!is_dummy
&& wlvif
&&
232 wlvif
->bss_type
== BSS_TYPE_AP_BSS
&&
233 test_bit(hlid
, wlvif
->ap
.sta_hlid_map
))
234 wl
->links
[hlid
].allocated_pkts
++;
238 wl1271_debug(DEBUG_TX
,
239 "tx_allocate: size: %d, blocks: %d, id: %d",
240 total_len
, total_blocks
, id
);
242 wl1271_free_tx_id(wl
, id
);
248 static void wl1271_tx_fill_hdr(struct wl1271
*wl
, struct wl12xx_vif
*wlvif
,
249 struct sk_buff
*skb
, u32 extra
,
250 struct ieee80211_tx_info
*control
, u8 hlid
)
253 struct wl1271_tx_hw_descr
*desc
;
257 __le16 frame_control
;
258 struct ieee80211_hdr
*hdr
;
262 desc
= (struct wl1271_tx_hw_descr
*) skb
->data
;
263 frame_start
= (u8
*)(desc
+ 1);
264 hdr
= (struct ieee80211_hdr
*)(frame_start
+ extra
);
265 frame_control
= hdr
->frame_control
;
267 /* relocate space for security header */
269 int hdrlen
= ieee80211_hdrlen(frame_control
);
270 memmove(frame_start
, hdr
, hdrlen
);
273 /* configure packet life time */
275 hosttime
= (timespec_to_ns(&ts
) >> 10);
276 desc
->start_time
= cpu_to_le32(hosttime
- wl
->time_offset
);
278 is_dummy
= wl12xx_is_dummy_packet(wl
, skb
);
279 if (is_dummy
|| !wlvif
|| wlvif
->bss_type
!= BSS_TYPE_AP_BSS
)
280 desc
->life_time
= cpu_to_le16(TX_HW_MGMT_PKT_LIFETIME_TU
);
282 desc
->life_time
= cpu_to_le16(TX_HW_AP_MODE_PKT_LIFETIME_TU
);
285 ac
= wl1271_tx_get_queue(skb_get_queue_mapping(skb
));
286 desc
->tid
= skb
->priority
;
290 * FW expects the dummy packet to have an invalid session id -
291 * any session id that is different than the one set in the join
293 tx_attr
= (SESSION_COUNTER_INVALID
<<
294 TX_HW_ATTR_OFST_SESSION_COUNTER
) &
295 TX_HW_ATTR_SESSION_COUNTER
;
297 tx_attr
|= TX_HW_ATTR_TX_DUMMY_REQ
;
299 /* configure the tx attributes */
300 tx_attr
= wlvif
->session_counter
<<
301 TX_HW_ATTR_OFST_SESSION_COUNTER
;
305 if (is_dummy
|| !wlvif
)
307 else if (wlvif
->bss_type
!= BSS_TYPE_AP_BSS
) {
308 /* if the packets are destined for AP (have a STA entry)
309 send them with AP rate policies, otherwise use default
311 if (control
->flags
& IEEE80211_TX_CTL_NO_CCK_RATE
)
312 rate_idx
= wlvif
->sta
.p2p_rate_idx
;
313 else if (control
->control
.sta
)
314 rate_idx
= wlvif
->sta
.ap_rate_idx
;
316 rate_idx
= wlvif
->sta
.basic_rate_idx
;
318 if (hlid
== wlvif
->ap
.global_hlid
)
319 rate_idx
= wlvif
->ap
.mgmt_rate_idx
;
320 else if (hlid
== wlvif
->ap
.bcast_hlid
)
321 rate_idx
= wlvif
->ap
.bcast_rate_idx
;
323 rate_idx
= wlvif
->ap
.ucast_rate_idx
[ac
];
326 tx_attr
|= rate_idx
<< TX_HW_ATTR_OFST_RATE_POLICY
;
328 /* for WEP shared auth - no fw encryption is needed */
329 if (ieee80211_is_auth(frame_control
) &&
330 ieee80211_has_protected(frame_control
))
331 tx_attr
|= TX_HW_ATTR_HOST_ENCRYPT
;
334 desc
->tx_attr
= cpu_to_le16(tx_attr
);
336 wlcore_hw_set_tx_desc_data_len(wl
, desc
, skb
);
339 /* caller must hold wl->mutex */
340 static int wl1271_prepare_tx_frame(struct wl1271
*wl
, struct wl12xx_vif
*wlvif
,
341 struct sk_buff
*skb
, u32 buf_offset
)
343 struct ieee80211_tx_info
*info
;
353 info
= IEEE80211_SKB_CB(skb
);
355 /* TODO: handle dummy packets on multi-vifs */
356 is_dummy
= wl12xx_is_dummy_packet(wl
, skb
);
358 if (info
->control
.hw_key
&&
359 info
->control
.hw_key
->cipher
== WLAN_CIPHER_SUITE_TKIP
)
360 extra
= WL1271_EXTRA_SPACE_TKIP
;
362 if (info
->control
.hw_key
) {
364 u8 idx
= info
->control
.hw_key
->hw_key_idx
;
365 u32 cipher
= info
->control
.hw_key
->cipher
;
367 is_wep
= (cipher
== WLAN_CIPHER_SUITE_WEP40
) ||
368 (cipher
== WLAN_CIPHER_SUITE_WEP104
);
370 if (unlikely(is_wep
&& wlvif
->default_key
!= idx
)) {
371 ret
= wl1271_set_default_wep_key(wl
, wlvif
, idx
);
374 wlvif
->default_key
= idx
;
377 hlid
= wl12xx_tx_get_hlid(wl
, wlvif
, skb
);
378 if (hlid
== WL12XX_INVALID_LINK_ID
) {
379 wl1271_error("invalid hlid. dropping skb 0x%p", skb
);
383 ret
= wl1271_tx_allocate(wl
, wlvif
, skb
, extra
, buf_offset
, hlid
);
387 wl1271_tx_fill_hdr(wl
, wlvif
, skb
, extra
, info
, hlid
);
389 if (!is_dummy
&& wlvif
&& wlvif
->bss_type
== BSS_TYPE_AP_BSS
) {
390 wl1271_tx_ap_update_inconnection_sta(wl
, skb
);
391 wl1271_tx_regulate_link(wl
, wlvif
, hlid
);
395 * The length of each packet is stored in terms of
396 * words. Thus, we must pad the skb data to make sure its
397 * length is aligned. The number of padding bytes is computed
398 * and set in wl1271_tx_fill_hdr.
399 * In special cases, we want to align to a specific block size
400 * (eg. for wl128x with SDIO we align to 256).
402 total_len
= wlcore_calc_packet_alignment(wl
, skb
->len
);
404 memcpy(wl
->aggr_buf
+ buf_offset
, skb
->data
, skb
->len
);
405 memset(wl
->aggr_buf
+ buf_offset
+ skb
->len
, 0, total_len
- skb
->len
);
407 /* Revert side effects in the dummy packet skb, so it can be reused */
409 skb_pull(skb
, sizeof(struct wl1271_tx_hw_descr
));
414 u32
wl1271_tx_enabled_rates_get(struct wl1271
*wl
, u32 rate_set
,
415 enum ieee80211_band rate_band
)
417 struct ieee80211_supported_band
*band
;
418 u32 enabled_rates
= 0;
421 band
= wl
->hw
->wiphy
->bands
[rate_band
];
422 for (bit
= 0; bit
< band
->n_bitrates
; bit
++) {
424 enabled_rates
|= band
->bitrates
[bit
].hw_value
;
428 /* MCS rates indication are on bits 16 - 23 */
429 rate_set
>>= HW_HT_RATES_OFFSET
- band
->n_bitrates
;
431 for (bit
= 0; bit
< 8; bit
++) {
433 enabled_rates
|= (CONF_HW_BIT_RATE_MCS_0
<< bit
);
437 return enabled_rates
;
440 void wl1271_handle_tx_low_watermark(struct wl1271
*wl
)
445 for (i
= 0; i
< NUM_TX_QUEUES
; i
++) {
446 if (test_bit(i
, &wl
->stopped_queues_map
) &&
447 wl
->tx_queue_count
[i
] <= WL1271_TX_QUEUE_LOW_WATERMARK
) {
448 /* firmware buffer has space, restart queues */
449 spin_lock_irqsave(&wl
->wl_lock
, flags
);
450 ieee80211_wake_queue(wl
->hw
,
451 wl1271_tx_get_mac80211_queue(i
));
452 clear_bit(i
, &wl
->stopped_queues_map
);
453 spin_unlock_irqrestore(&wl
->wl_lock
, flags
);
458 static struct sk_buff_head
*wl1271_select_queue(struct wl1271
*wl
,
459 struct sk_buff_head
*queues
)
462 u32 min_pkts
= 0xffffffff;
465 * Find a non-empty ac where:
466 * 1. There are packets to transmit
467 * 2. The FW has the least allocated blocks
469 * We prioritize the ACs according to VO>VI>BE>BK
471 for (i
= 0; i
< NUM_TX_QUEUES
; i
++) {
472 ac
= wl1271_tx_get_queue(i
);
473 if (!skb_queue_empty(&queues
[ac
]) &&
474 (wl
->tx_allocated_pkts
[ac
] < min_pkts
)) {
476 min_pkts
= wl
->tx_allocated_pkts
[q
];
486 static struct sk_buff
*wl12xx_lnk_skb_dequeue(struct wl1271
*wl
,
487 struct wl1271_link
*lnk
)
491 struct sk_buff_head
*queue
;
493 queue
= wl1271_select_queue(wl
, lnk
->tx_queue
);
497 skb
= skb_dequeue(queue
);
499 int q
= wl1271_tx_get_queue(skb_get_queue_mapping(skb
));
500 spin_lock_irqsave(&wl
->wl_lock
, flags
);
501 WARN_ON_ONCE(wl
->tx_queue_count
[q
] <= 0);
502 wl
->tx_queue_count
[q
]--;
503 spin_unlock_irqrestore(&wl
->wl_lock
, flags
);
509 static struct sk_buff
*wl12xx_vif_skb_dequeue(struct wl1271
*wl
,
510 struct wl12xx_vif
*wlvif
)
512 struct sk_buff
*skb
= NULL
;
513 int i
, h
, start_hlid
;
515 /* start from the link after the last one */
516 start_hlid
= (wlvif
->last_tx_hlid
+ 1) % WL12XX_MAX_LINKS
;
518 /* dequeue according to AC, round robin on each link */
519 for (i
= 0; i
< WL12XX_MAX_LINKS
; i
++) {
520 h
= (start_hlid
+ i
) % WL12XX_MAX_LINKS
;
522 /* only consider connected stations */
523 if (!test_bit(h
, wlvif
->links_map
))
526 skb
= wl12xx_lnk_skb_dequeue(wl
, &wl
->links
[h
]);
530 wlvif
->last_tx_hlid
= h
;
535 wlvif
->last_tx_hlid
= 0;
540 static struct sk_buff
*wl1271_skb_dequeue(struct wl1271
*wl
)
543 struct wl12xx_vif
*wlvif
= wl
->last_wlvif
;
544 struct sk_buff
*skb
= NULL
;
546 /* continue from last wlvif (round robin) */
548 wl12xx_for_each_wlvif_continue(wl
, wlvif
) {
549 skb
= wl12xx_vif_skb_dequeue(wl
, wlvif
);
551 wl
->last_wlvif
= wlvif
;
557 /* dequeue from the system HLID before the restarting wlvif list */
559 skb
= wl12xx_lnk_skb_dequeue(wl
, &wl
->links
[wl
->system_hlid
]);
561 /* do a new pass over the wlvif list */
563 wl12xx_for_each_wlvif(wl
, wlvif
) {
564 skb
= wl12xx_vif_skb_dequeue(wl
, wlvif
);
566 wl
->last_wlvif
= wlvif
;
571 * No need to continue after last_wlvif. The previous
572 * pass should have found it.
574 if (wlvif
== wl
->last_wlvif
)
580 test_and_clear_bit(WL1271_FLAG_DUMMY_PACKET_PENDING
, &wl
->flags
)) {
583 skb
= wl
->dummy_packet
;
584 q
= wl1271_tx_get_queue(skb_get_queue_mapping(skb
));
585 spin_lock_irqsave(&wl
->wl_lock
, flags
);
586 WARN_ON_ONCE(wl
->tx_queue_count
[q
] <= 0);
587 wl
->tx_queue_count
[q
]--;
588 spin_unlock_irqrestore(&wl
->wl_lock
, flags
);
594 static void wl1271_skb_queue_head(struct wl1271
*wl
, struct wl12xx_vif
*wlvif
,
598 int q
= wl1271_tx_get_queue(skb_get_queue_mapping(skb
));
600 if (wl12xx_is_dummy_packet(wl
, skb
)) {
601 set_bit(WL1271_FLAG_DUMMY_PACKET_PENDING
, &wl
->flags
);
603 u8 hlid
= wl12xx_tx_get_hlid(wl
, wlvif
, skb
);
604 skb_queue_head(&wl
->links
[hlid
].tx_queue
[q
], skb
);
606 /* make sure we dequeue the same packet next time */
607 wlvif
->last_tx_hlid
= (hlid
+ WL12XX_MAX_LINKS
- 1) %
611 spin_lock_irqsave(&wl
->wl_lock
, flags
);
612 wl
->tx_queue_count
[q
]++;
613 spin_unlock_irqrestore(&wl
->wl_lock
, flags
);
616 static bool wl1271_tx_is_data_present(struct sk_buff
*skb
)
618 struct ieee80211_hdr
*hdr
= (struct ieee80211_hdr
*)(skb
->data
);
620 return ieee80211_is_data_present(hdr
->frame_control
);
623 void wl12xx_rearm_rx_streaming(struct wl1271
*wl
, unsigned long *active_hlids
)
625 struct wl12xx_vif
*wlvif
;
629 if (!wl
->conf
.rx_streaming
.interval
)
632 if (!wl
->conf
.rx_streaming
.always
&&
633 !test_bit(WL1271_FLAG_SOFT_GEMINI
, &wl
->flags
))
636 timeout
= wl
->conf
.rx_streaming
.duration
;
637 wl12xx_for_each_wlvif_sta(wl
, wlvif
) {
639 for_each_set_bit(hlid
, active_hlids
, WL12XX_MAX_LINKS
) {
640 if (test_bit(hlid
, wlvif
->links_map
)) {
649 /* enable rx streaming */
650 if (!test_bit(WLVIF_FLAG_RX_STREAMING_STARTED
, &wlvif
->flags
))
651 ieee80211_queue_work(wl
->hw
,
652 &wlvif
->rx_streaming_enable_work
);
654 mod_timer(&wlvif
->rx_streaming_timer
,
655 jiffies
+ msecs_to_jiffies(timeout
));
659 void wl1271_tx_work_locked(struct wl1271
*wl
)
661 struct wl12xx_vif
*wlvif
;
663 struct wl1271_tx_hw_descr
*desc
;
665 bool sent_packets
= false;
666 unsigned long active_hlids
[BITS_TO_LONGS(WL12XX_MAX_LINKS
)] = {0};
669 if (unlikely(wl
->state
== WL1271_STATE_OFF
))
672 while ((skb
= wl1271_skb_dequeue(wl
))) {
673 struct ieee80211_tx_info
*info
= IEEE80211_SKB_CB(skb
);
674 bool has_data
= false;
677 if (!wl12xx_is_dummy_packet(wl
, skb
) && info
->control
.vif
)
678 wlvif
= wl12xx_vif_to_data(info
->control
.vif
);
680 has_data
= wlvif
&& wl1271_tx_is_data_present(skb
);
681 ret
= wl1271_prepare_tx_frame(wl
, wlvif
, skb
, buf_offset
);
682 if (ret
== -EAGAIN
) {
684 * Aggregation buffer is full.
685 * Flush buffer and try again.
687 wl1271_skb_queue_head(wl
, wlvif
, skb
);
688 wlcore_write_data(wl
, REG_SLV_MEM_DATA
, wl
->aggr_buf
,
693 } else if (ret
== -EBUSY
) {
695 * Firmware buffer is full.
696 * Queue back last skb, and stop aggregating.
698 wl1271_skb_queue_head(wl
, wlvif
, skb
);
699 /* No work left, avoid scheduling redundant tx work */
700 set_bit(WL1271_FLAG_FW_TX_BUSY
, &wl
->flags
);
702 } else if (ret
< 0) {
703 if (wl12xx_is_dummy_packet(wl
, skb
))
705 * fw still expects dummy packet,
708 wl1271_skb_queue_head(wl
, wlvif
, skb
);
710 ieee80211_free_txskb(wl
->hw
, skb
);
714 wl
->tx_packets_count
++;
716 desc
= (struct wl1271_tx_hw_descr
*) skb
->data
;
717 __set_bit(desc
->hlid
, active_hlids
);
723 wlcore_write_data(wl
, REG_SLV_MEM_DATA
, wl
->aggr_buf
,
729 * Interrupt the firmware with the new packets. This is only
730 * required for older hardware revisions
732 if (wl
->quirks
& WLCORE_QUIRK_END_OF_TRANSACTION
)
733 wl1271_write32(wl
, WL12XX_HOST_WR_ACCESS
,
734 wl
->tx_packets_count
);
736 wl1271_handle_tx_low_watermark(wl
);
738 wl12xx_rearm_rx_streaming(wl
, active_hlids
);
741 void wl1271_tx_work(struct work_struct
*work
)
743 struct wl1271
*wl
= container_of(work
, struct wl1271
, tx_work
);
746 mutex_lock(&wl
->mutex
);
747 ret
= wl1271_ps_elp_wakeup(wl
);
751 wl1271_tx_work_locked(wl
);
753 wl1271_ps_elp_sleep(wl
);
755 mutex_unlock(&wl
->mutex
);
758 static u8
wl1271_tx_get_rate_flags(u8 rate_class_index
)
763 * TODO: use wl12xx constants when this code is moved to wl12xx, as
764 * only it uses Tx-completion.
766 if (rate_class_index
<= 8)
767 flags
|= IEEE80211_TX_RC_MCS
;
770 * TODO: use wl12xx constants when this code is moved to wl12xx, as
771 * only it uses Tx-completion.
773 if (rate_class_index
== 0)
774 flags
|= IEEE80211_TX_RC_SHORT_GI
;
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
;
791 /* check for id legality */
792 if (unlikely(id
>= wl
->num_tx_desc
|| wl
->tx_frames
[id
] == NULL
)) {
793 wl1271_warning("TX result illegal id: %d", id
);
797 skb
= wl
->tx_frames
[id
];
798 info
= IEEE80211_SKB_CB(skb
);
800 if (wl12xx_is_dummy_packet(wl
, skb
)) {
801 wl1271_free_tx_id(wl
, id
);
805 /* info->control is valid as long as we don't update info->status */
806 vif
= info
->control
.vif
;
807 wlvif
= wl12xx_vif_to_data(vif
);
809 /* update the TX status info */
810 if (result
->status
== TX_SUCCESS
) {
811 if (!(info
->flags
& IEEE80211_TX_CTL_NO_ACK
))
812 info
->flags
|= IEEE80211_TX_STAT_ACK
;
813 rate
= wlcore_rate_to_idx(wl
, result
->rate_class_index
,
815 rate_flags
= wl1271_tx_get_rate_flags(result
->rate_class_index
);
816 retries
= result
->ack_failures
;
817 } else if (result
->status
== TX_RETRY_EXCEEDED
) {
818 wl
->stats
.excessive_retries
++;
819 retries
= result
->ack_failures
;
822 info
->status
.rates
[0].idx
= rate
;
823 info
->status
.rates
[0].count
= retries
;
824 info
->status
.rates
[0].flags
= rate_flags
;
825 info
->status
.ack_signal
= -1;
827 wl
->stats
.retry_count
+= result
->ack_failures
;
830 * update sequence number only when relevant, i.e. only in
831 * sessions of TKIP, AES and GEM (not in open or WEP sessions)
833 if (info
->control
.hw_key
&&
834 (info
->control
.hw_key
->cipher
== WLAN_CIPHER_SUITE_TKIP
||
835 info
->control
.hw_key
->cipher
== WLAN_CIPHER_SUITE_CCMP
||
836 info
->control
.hw_key
->cipher
== WL1271_CIPHER_SUITE_GEM
)) {
837 u8 fw_lsb
= result
->tx_security_sequence_number_lsb
;
838 u8 cur_lsb
= wlvif
->tx_security_last_seq_lsb
;
841 * update security sequence number, taking care of potential
844 wlvif
->tx_security_seq
+= (fw_lsb
- cur_lsb
) & 0xff;
845 wlvif
->tx_security_last_seq_lsb
= fw_lsb
;
848 /* remove private header from packet */
849 skb_pull(skb
, sizeof(struct wl1271_tx_hw_descr
));
851 /* remove TKIP header space if present */
852 if (info
->control
.hw_key
&&
853 info
->control
.hw_key
->cipher
== WLAN_CIPHER_SUITE_TKIP
) {
854 int hdrlen
= ieee80211_get_hdrlen_from_skb(skb
);
855 memmove(skb
->data
+ WL1271_EXTRA_SPACE_TKIP
, skb
->data
,
857 skb_pull(skb
, WL1271_EXTRA_SPACE_TKIP
);
860 wl1271_debug(DEBUG_TX
, "tx status id %u skb 0x%p failures %u rate 0x%x"
862 result
->id
, skb
, result
->ack_failures
,
863 result
->rate_class_index
, result
->status
);
865 /* return the packet to the stack */
866 skb_queue_tail(&wl
->deferred_tx_queue
, skb
);
867 queue_work(wl
->freezable_wq
, &wl
->netstack_work
);
868 wl1271_free_tx_id(wl
, result
->id
);
871 /* Called upon reception of a TX complete interrupt */
872 void wl1271_tx_complete(struct wl1271
*wl
)
874 struct wl1271_acx_mem_map
*memmap
=
875 (struct wl1271_acx_mem_map
*)wl
->target_mem_map
;
876 u32 count
, fw_counter
;
879 /* read the tx results from the chipset */
880 wl1271_read(wl
, le32_to_cpu(memmap
->tx_result
),
881 wl
->tx_res_if
, sizeof(*wl
->tx_res_if
), false);
882 fw_counter
= le32_to_cpu(wl
->tx_res_if
->tx_result_fw_counter
);
884 /* write host counter to chipset (to ack) */
885 wl1271_write32(wl
, le32_to_cpu(memmap
->tx_result
) +
886 offsetof(struct wl1271_tx_hw_res_if
,
887 tx_result_host_counter
), fw_counter
);
889 count
= fw_counter
- wl
->tx_results_count
;
890 wl1271_debug(DEBUG_TX
, "tx_complete received, packets: %d", count
);
892 /* verify that the result buffer is not getting overrun */
893 if (unlikely(count
> TX_HW_RESULT_QUEUE_LEN
))
894 wl1271_warning("TX result overflow from chipset: %d", count
);
896 /* process the results */
897 for (i
= 0; i
< count
; i
++) {
898 struct wl1271_tx_hw_res_descr
*result
;
899 u8 offset
= wl
->tx_results_count
& TX_HW_RESULT_QUEUE_LEN_MASK
;
901 /* process the packet */
902 result
= &(wl
->tx_res_if
->tx_results_queue
[offset
]);
903 wl1271_tx_complete_packet(wl
, result
);
905 wl
->tx_results_count
++;
908 EXPORT_SYMBOL(wl1271_tx_complete
);
910 void wl1271_tx_reset_link_queues(struct wl1271
*wl
, u8 hlid
)
915 struct ieee80211_tx_info
*info
;
916 int total
[NUM_TX_QUEUES
];
918 for (i
= 0; i
< NUM_TX_QUEUES
; i
++) {
920 while ((skb
= skb_dequeue(&wl
->links
[hlid
].tx_queue
[i
]))) {
921 wl1271_debug(DEBUG_TX
, "link freeing skb 0x%p", skb
);
923 if (!wl12xx_is_dummy_packet(wl
, skb
)) {
924 info
= IEEE80211_SKB_CB(skb
);
925 info
->status
.rates
[0].idx
= -1;
926 info
->status
.rates
[0].count
= 0;
927 ieee80211_tx_status_ni(wl
->hw
, skb
);
934 spin_lock_irqsave(&wl
->wl_lock
, flags
);
935 for (i
= 0; i
< NUM_TX_QUEUES
; i
++)
936 wl
->tx_queue_count
[i
] -= total
[i
];
937 spin_unlock_irqrestore(&wl
->wl_lock
, flags
);
939 wl1271_handle_tx_low_watermark(wl
);
942 /* caller must hold wl->mutex and TX must be stopped */
943 void wl12xx_tx_reset_wlvif(struct wl1271
*wl
, struct wl12xx_vif
*wlvif
)
948 for_each_set_bit(i
, wlvif
->links_map
, WL12XX_MAX_LINKS
) {
949 if (wlvif
->bss_type
== BSS_TYPE_AP_BSS
)
950 wl1271_free_sta(wl
, wlvif
, i
);
952 wlvif
->sta
.ba_rx_bitmap
= 0;
954 wl
->links
[i
].allocated_pkts
= 0;
955 wl
->links
[i
].prev_freed_pkts
= 0;
957 wlvif
->last_tx_hlid
= 0;
960 /* caller must hold wl->mutex and TX must be stopped */
961 void wl12xx_tx_reset(struct wl1271
*wl
, bool reset_tx_queues
)
965 struct ieee80211_tx_info
*info
;
967 /* only reset the queues if something bad happened */
968 if (WARN_ON_ONCE(wl1271_tx_total_queue_count(wl
) != 0)) {
969 for (i
= 0; i
< WL12XX_MAX_LINKS
; i
++)
970 wl1271_tx_reset_link_queues(wl
, i
);
972 for (i
= 0; i
< NUM_TX_QUEUES
; i
++)
973 wl
->tx_queue_count
[i
] = 0;
976 wl
->stopped_queues_map
= 0;
979 * Make sure the driver is at a consistent state, in case this
980 * function is called from a context other than interface removal.
981 * This call will always wake the TX queues.
984 wl1271_handle_tx_low_watermark(wl
);
986 for (i
= 0; i
< wl
->num_tx_desc
; i
++) {
987 if (wl
->tx_frames
[i
] == NULL
)
990 skb
= wl
->tx_frames
[i
];
991 wl1271_free_tx_id(wl
, i
);
992 wl1271_debug(DEBUG_TX
, "freeing skb 0x%p", skb
);
994 if (!wl12xx_is_dummy_packet(wl
, skb
)) {
996 * Remove private headers before passing the skb to
999 info
= IEEE80211_SKB_CB(skb
);
1000 skb_pull(skb
, sizeof(struct wl1271_tx_hw_descr
));
1001 if (info
->control
.hw_key
&&
1002 info
->control
.hw_key
->cipher
==
1003 WLAN_CIPHER_SUITE_TKIP
) {
1004 int hdrlen
= ieee80211_get_hdrlen_from_skb(skb
);
1005 memmove(skb
->data
+ WL1271_EXTRA_SPACE_TKIP
,
1007 skb_pull(skb
, WL1271_EXTRA_SPACE_TKIP
);
1010 info
->status
.rates
[0].idx
= -1;
1011 info
->status
.rates
[0].count
= 0;
1013 ieee80211_tx_status_ni(wl
->hw
, skb
);
1018 #define WL1271_TX_FLUSH_TIMEOUT 500000
1020 /* caller must *NOT* hold wl->mutex */
1021 void wl1271_tx_flush(struct wl1271
*wl
)
1023 unsigned long timeout
;
1025 timeout
= jiffies
+ usecs_to_jiffies(WL1271_TX_FLUSH_TIMEOUT
);
1027 while (!time_after(jiffies
, timeout
)) {
1028 mutex_lock(&wl
->mutex
);
1029 wl1271_debug(DEBUG_TX
, "flushing tx buffer: %d %d",
1031 wl1271_tx_total_queue_count(wl
));
1032 if ((wl
->tx_frames_cnt
== 0) &&
1033 (wl1271_tx_total_queue_count(wl
) == 0)) {
1034 mutex_unlock(&wl
->mutex
);
1037 mutex_unlock(&wl
->mutex
);
1041 wl1271_warning("Unable to flush all TX buffers, timed out.");
1043 /* forcibly flush all Tx buffers on our queues */
1044 mutex_lock(&wl
->mutex
);
1045 for (i
= 0; i
< WL12XX_MAX_LINKS
; i
++)
1046 wl1271_tx_reset_link_queues(wl
, i
);
1047 mutex_unlock(&wl
->mutex
);
1050 u32
wl1271_tx_min_rate_get(struct wl1271
*wl
, u32 rate_set
)
1052 if (WARN_ON(!rate_set
))
1055 return BIT(__ffs(rate_set
));