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));