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 (is_multicast_ether_addr(ieee80211_get_DA(hdr)))
152 return wlvif->ap.bcast_hlid;
154 return wlvif->ap.global_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_PAD_LAST_FRAME) ||
182 !(wl->quirks & WLCORE_QUIRK_TX_BLOCKSIZE_ALIGN))
183 return ALIGN(packet_length, WL1271_TX_ALIGN_TO);
185 return ALIGN(packet_length, WL12XX_BUS_BLOCK_SIZE);
187 EXPORT_SYMBOL(wlcore_calc_packet_alignment);
189 static int wl1271_tx_allocate(struct wl1271 *wl, struct wl12xx_vif *wlvif,
190 struct sk_buff *skb, u32 extra, u32 buf_offset,
191 u8 hlid, bool is_gem)
193 struct wl1271_tx_hw_descr *desc;
194 u32 total_len = skb->len + sizeof(struct wl1271_tx_hw_descr) + extra;
196 int id, ret = -EBUSY, ac;
199 if (buf_offset + total_len > WL1271_AGGR_BUFFER_SIZE)
202 spare_blocks = wlcore_hw_get_spare_blocks(wl, is_gem);
204 /* allocate free identifier for the packet */
205 id = wl1271_alloc_tx_id(wl, skb);
209 total_blocks = wlcore_hw_calc_tx_blocks(wl, total_len, spare_blocks);
211 if (total_blocks <= wl->tx_blocks_available) {
212 desc = (struct wl1271_tx_hw_descr *)skb_push(
213 skb, total_len - skb->len);
215 wlcore_hw_set_tx_desc_blocks(wl, desc, total_blocks,
220 wl->tx_blocks_available -= total_blocks;
221 wl->tx_allocated_blocks += total_blocks;
223 /* If the FW was empty before, arm the Tx watchdog */
224 if (wl->tx_allocated_blocks == total_blocks)
225 wl12xx_rearm_tx_watchdog_locked(wl);
227 ac = wl1271_tx_get_queue(skb_get_queue_mapping(skb));
228 wl->tx_allocated_pkts[ac]++;
230 if (!wl12xx_is_dummy_packet(wl, skb) && wlvif &&
231 wlvif->bss_type == BSS_TYPE_AP_BSS &&
232 test_bit(hlid, wlvif->ap.sta_hlid_map))
233 wl->links[hlid].allocated_pkts++;
237 wl1271_debug(DEBUG_TX,
238 "tx_allocate: size: %d, blocks: %d, id: %d",
239 total_len, total_blocks, id);
241 wl1271_free_tx_id(wl, id);
247 static void wl1271_tx_fill_hdr(struct wl1271 *wl, struct wl12xx_vif *wlvif,
248 struct sk_buff *skb, u32 extra,
249 struct ieee80211_tx_info *control, u8 hlid)
252 struct wl1271_tx_hw_descr *desc;
256 __le16 frame_control;
257 struct ieee80211_hdr *hdr;
261 desc = (struct wl1271_tx_hw_descr *) skb->data;
262 frame_start = (u8 *)(desc + 1);
263 hdr = (struct ieee80211_hdr *)(frame_start + extra);
264 frame_control = hdr->frame_control;
266 /* relocate space for security header */
268 int hdrlen = ieee80211_hdrlen(frame_control);
269 memmove(frame_start, hdr, hdrlen);
270 skb_set_network_header(skb, skb_network_offset(skb) + extra);
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;
333 desc->tx_attr = cpu_to_le16(tx_attr);
335 wlcore_hw_set_tx_desc_csum(wl, desc, skb);
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;
354 info = IEEE80211_SKB_CB(skb);
356 /* TODO: handle dummy packets on multi-vifs */
357 is_dummy = wl12xx_is_dummy_packet(wl, skb);
359 if ((wl->quirks & WLCORE_QUIRK_TKIP_HEADER_SPACE) &&
360 info->control.hw_key &&
361 info->control.hw_key->cipher == WLAN_CIPHER_SUITE_TKIP)
362 extra = WL1271_EXTRA_SPACE_TKIP;
364 if (info->control.hw_key) {
366 u8 idx = info->control.hw_key->hw_key_idx;
367 u32 cipher = info->control.hw_key->cipher;
369 is_wep = (cipher == WLAN_CIPHER_SUITE_WEP40) ||
370 (cipher == WLAN_CIPHER_SUITE_WEP104);
372 if (unlikely(is_wep && wlvif->default_key != idx)) {
373 ret = wl1271_set_default_wep_key(wl, wlvif, idx);
376 wlvif->default_key = idx;
379 is_gem = (cipher == WL1271_CIPHER_SUITE_GEM);
381 hlid = wl12xx_tx_get_hlid(wl, wlvif, skb);
382 if (hlid == WL12XX_INVALID_LINK_ID) {
383 wl1271_error("invalid hlid. dropping skb 0x%p", skb);
387 ret = wl1271_tx_allocate(wl, wlvif, skb, extra, buf_offset, hlid,
392 wl1271_tx_fill_hdr(wl, wlvif, skb, extra, info, hlid);
394 if (!is_dummy && wlvif && wlvif->bss_type == BSS_TYPE_AP_BSS) {
395 wl1271_tx_ap_update_inconnection_sta(wl, skb);
396 wl1271_tx_regulate_link(wl, wlvif, hlid);
400 * The length of each packet is stored in terms of
401 * words. Thus, we must pad the skb data to make sure its
402 * length is aligned. The number of padding bytes is computed
403 * and set in wl1271_tx_fill_hdr.
404 * In special cases, we want to align to a specific block size
405 * (eg. for wl128x with SDIO we align to 256).
407 total_len = wlcore_calc_packet_alignment(wl, skb->len);
409 memcpy(wl->aggr_buf + buf_offset, skb->data, skb->len);
410 memset(wl->aggr_buf + buf_offset + skb->len, 0, total_len - skb->len);
412 /* Revert side effects in the dummy packet skb, so it can be reused */
414 skb_pull(skb, sizeof(struct wl1271_tx_hw_descr));
419 u32 wl1271_tx_enabled_rates_get(struct wl1271 *wl, u32 rate_set,
420 enum ieee80211_band rate_band)
422 struct ieee80211_supported_band *band;
423 u32 enabled_rates = 0;
426 band = wl->hw->wiphy->bands[rate_band];
427 for (bit = 0; bit < band->n_bitrates; bit++) {
429 enabled_rates |= band->bitrates[bit].hw_value;
433 /* MCS rates indication are on bits 16 - 31 */
434 rate_set >>= HW_HT_RATES_OFFSET - band->n_bitrates;
436 for (bit = 0; bit < 16; bit++) {
438 enabled_rates |= (CONF_HW_BIT_RATE_MCS_0 << bit);
442 return enabled_rates;
445 void wl1271_handle_tx_low_watermark(struct wl1271 *wl)
449 for (i = 0; i < NUM_TX_QUEUES; i++) {
450 if (wlcore_is_queue_stopped_by_reason(wl, i,
451 WLCORE_QUEUE_STOP_REASON_WATERMARK) &&
452 wl->tx_queue_count[i] <= WL1271_TX_QUEUE_LOW_WATERMARK) {
453 /* firmware buffer has space, restart queues */
454 wlcore_wake_queue(wl, i,
455 WLCORE_QUEUE_STOP_REASON_WATERMARK);
460 static struct sk_buff_head *wl1271_select_queue(struct wl1271 *wl,
461 struct sk_buff_head *queues)
464 u32 min_pkts = 0xffffffff;
467 * Find a non-empty ac where:
468 * 1. There are packets to transmit
469 * 2. The FW has the least allocated blocks
471 * We prioritize the ACs according to VO>VI>BE>BK
473 for (i = 0; i < NUM_TX_QUEUES; i++) {
474 ac = wl1271_tx_get_queue(i);
475 if (!skb_queue_empty(&queues[ac]) &&
476 (wl->tx_allocated_pkts[ac] < min_pkts)) {
478 min_pkts = wl->tx_allocated_pkts[q];
488 static struct sk_buff *wl12xx_lnk_skb_dequeue(struct wl1271 *wl,
489 struct wl1271_link *lnk)
493 struct sk_buff_head *queue;
495 queue = wl1271_select_queue(wl, lnk->tx_queue);
499 skb = skb_dequeue(queue);
501 int q = wl1271_tx_get_queue(skb_get_queue_mapping(skb));
502 spin_lock_irqsave(&wl->wl_lock, flags);
503 WARN_ON_ONCE(wl->tx_queue_count[q] <= 0);
504 wl->tx_queue_count[q]--;
505 spin_unlock_irqrestore(&wl->wl_lock, flags);
511 static struct sk_buff *wl12xx_vif_skb_dequeue(struct wl1271 *wl,
512 struct wl12xx_vif *wlvif)
514 struct sk_buff *skb = NULL;
515 int i, h, start_hlid;
517 /* start from the link after the last one */
518 start_hlid = (wlvif->last_tx_hlid + 1) % WL12XX_MAX_LINKS;
520 /* dequeue according to AC, round robin on each link */
521 for (i = 0; i < WL12XX_MAX_LINKS; i++) {
522 h = (start_hlid + i) % WL12XX_MAX_LINKS;
524 /* only consider connected stations */
525 if (!test_bit(h, wlvif->links_map))
528 skb = wl12xx_lnk_skb_dequeue(wl, &wl->links[h]);
532 wlvif->last_tx_hlid = h;
537 wlvif->last_tx_hlid = 0;
542 static struct sk_buff *wl1271_skb_dequeue(struct wl1271 *wl)
545 struct wl12xx_vif *wlvif = wl->last_wlvif;
546 struct sk_buff *skb = NULL;
548 /* continue from last wlvif (round robin) */
550 wl12xx_for_each_wlvif_continue(wl, wlvif) {
551 skb = wl12xx_vif_skb_dequeue(wl, wlvif);
553 wl->last_wlvif = wlvif;
559 /* dequeue from the system HLID before the restarting wlvif list */
561 skb = wl12xx_lnk_skb_dequeue(wl, &wl->links[wl->system_hlid]);
563 /* do a new pass over the wlvif list */
565 wl12xx_for_each_wlvif(wl, wlvif) {
566 skb = wl12xx_vif_skb_dequeue(wl, wlvif);
568 wl->last_wlvif = wlvif;
573 * No need to continue after last_wlvif. The previous
574 * pass should have found it.
576 if (wlvif == wl->last_wlvif)
582 test_and_clear_bit(WL1271_FLAG_DUMMY_PACKET_PENDING, &wl->flags)) {
585 skb = wl->dummy_packet;
586 q = wl1271_tx_get_queue(skb_get_queue_mapping(skb));
587 spin_lock_irqsave(&wl->wl_lock, flags);
588 WARN_ON_ONCE(wl->tx_queue_count[q] <= 0);
589 wl->tx_queue_count[q]--;
590 spin_unlock_irqrestore(&wl->wl_lock, flags);
596 static void wl1271_skb_queue_head(struct wl1271 *wl, struct wl12xx_vif *wlvif,
600 int q = wl1271_tx_get_queue(skb_get_queue_mapping(skb));
602 if (wl12xx_is_dummy_packet(wl, skb)) {
603 set_bit(WL1271_FLAG_DUMMY_PACKET_PENDING, &wl->flags);
605 u8 hlid = wl12xx_tx_get_hlid(wl, wlvif, skb);
606 skb_queue_head(&wl->links[hlid].tx_queue[q], skb);
608 /* make sure we dequeue the same packet next time */
609 wlvif->last_tx_hlid = (hlid + WL12XX_MAX_LINKS - 1) %
613 spin_lock_irqsave(&wl->wl_lock, flags);
614 wl->tx_queue_count[q]++;
615 spin_unlock_irqrestore(&wl->wl_lock, flags);
618 static bool wl1271_tx_is_data_present(struct sk_buff *skb)
620 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)(skb->data);
622 return ieee80211_is_data_present(hdr->frame_control);
625 void wl12xx_rearm_rx_streaming(struct wl1271 *wl, unsigned long *active_hlids)
627 struct wl12xx_vif *wlvif;
631 if (!wl->conf.rx_streaming.interval)
634 if (!wl->conf.rx_streaming.always &&
635 !test_bit(WL1271_FLAG_SOFT_GEMINI, &wl->flags))
638 timeout = wl->conf.rx_streaming.duration;
639 wl12xx_for_each_wlvif_sta(wl, wlvif) {
641 for_each_set_bit(hlid, active_hlids, WL12XX_MAX_LINKS) {
642 if (test_bit(hlid, wlvif->links_map)) {
651 /* enable rx streaming */
652 if (!test_bit(WLVIF_FLAG_RX_STREAMING_STARTED, &wlvif->flags))
653 ieee80211_queue_work(wl->hw,
654 &wlvif->rx_streaming_enable_work);
656 mod_timer(&wlvif->rx_streaming_timer,
657 jiffies + msecs_to_jiffies(timeout));
661 void wl1271_tx_work_locked(struct wl1271 *wl)
663 struct wl12xx_vif *wlvif;
665 struct wl1271_tx_hw_descr *desc;
666 u32 buf_offset = 0, last_len = 0;
667 bool sent_packets = false;
668 unsigned long active_hlids[BITS_TO_LONGS(WL12XX_MAX_LINKS)] = {0};
671 if (unlikely(wl->state == WL1271_STATE_OFF))
674 while ((skb = wl1271_skb_dequeue(wl))) {
675 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
676 bool has_data = false;
679 if (!wl12xx_is_dummy_packet(wl, skb) && info->control.vif)
680 wlvif = wl12xx_vif_to_data(info->control.vif);
682 has_data = wlvif && wl1271_tx_is_data_present(skb);
683 ret = wl1271_prepare_tx_frame(wl, wlvif, skb, buf_offset);
684 if (ret == -EAGAIN) {
686 * Aggregation buffer is full.
687 * Flush buffer and try again.
689 wl1271_skb_queue_head(wl, wlvif, skb);
691 buf_offset = wlcore_hw_pre_pkt_send(wl, buf_offset,
693 wlcore_write_data(wl, REG_SLV_MEM_DATA, wl->aggr_buf,
698 } else if (ret == -EBUSY) {
700 * Firmware buffer is full.
701 * Queue back last skb, and stop aggregating.
703 wl1271_skb_queue_head(wl, wlvif, skb);
704 /* No work left, avoid scheduling redundant tx work */
705 set_bit(WL1271_FLAG_FW_TX_BUSY, &wl->flags);
707 } else if (ret < 0) {
708 if (wl12xx_is_dummy_packet(wl, skb))
710 * fw still expects dummy packet,
713 wl1271_skb_queue_head(wl, wlvif, skb);
715 ieee80211_free_txskb(wl->hw, skb);
719 buf_offset += last_len;
720 wl->tx_packets_count++;
722 desc = (struct wl1271_tx_hw_descr *) skb->data;
723 __set_bit(desc->hlid, active_hlids);
729 buf_offset = wlcore_hw_pre_pkt_send(wl, buf_offset, last_len);
730 wlcore_write_data(wl, REG_SLV_MEM_DATA, wl->aggr_buf,
736 * Interrupt the firmware with the new packets. This is only
737 * required for older hardware revisions
739 if (wl->quirks & WLCORE_QUIRK_END_OF_TRANSACTION)
740 wl1271_write32(wl, WL12XX_HOST_WR_ACCESS,
741 wl->tx_packets_count);
743 wl1271_handle_tx_low_watermark(wl);
745 wl12xx_rearm_rx_streaming(wl, active_hlids);
748 void wl1271_tx_work(struct work_struct *work)
750 struct wl1271 *wl = container_of(work, struct wl1271, tx_work);
753 mutex_lock(&wl->mutex);
754 ret = wl1271_ps_elp_wakeup(wl);
758 wl1271_tx_work_locked(wl);
760 wl1271_ps_elp_sleep(wl);
762 mutex_unlock(&wl->mutex);
765 static u8 wl1271_tx_get_rate_flags(u8 rate_class_index)
770 * TODO: use wl12xx constants when this code is moved to wl12xx, as
771 * only it uses Tx-completion.
773 if (rate_class_index <= 8)
774 flags |= IEEE80211_TX_RC_MCS;
777 * TODO: use wl12xx constants when this code is moved to wl12xx, as
778 * only it uses Tx-completion.
780 if (rate_class_index == 0)
781 flags |= IEEE80211_TX_RC_SHORT_GI;
786 static void wl1271_tx_complete_packet(struct wl1271 *wl,
787 struct wl1271_tx_hw_res_descr *result)
789 struct ieee80211_tx_info *info;
790 struct ieee80211_vif *vif;
791 struct wl12xx_vif *wlvif;
798 /* check for id legality */
799 if (unlikely(id >= wl->num_tx_desc || wl->tx_frames[id] == NULL)) {
800 wl1271_warning("TX result illegal id: %d", id);
804 skb = wl->tx_frames[id];
805 info = IEEE80211_SKB_CB(skb);
807 if (wl12xx_is_dummy_packet(wl, skb)) {
808 wl1271_free_tx_id(wl, id);
812 /* info->control is valid as long as we don't update info->status */
813 vif = info->control.vif;
814 wlvif = wl12xx_vif_to_data(vif);
816 /* update the TX status info */
817 if (result->status == TX_SUCCESS) {
818 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK))
819 info->flags |= IEEE80211_TX_STAT_ACK;
820 rate = wlcore_rate_to_idx(wl, result->rate_class_index,
822 rate_flags = wl1271_tx_get_rate_flags(result->rate_class_index);
823 retries = result->ack_failures;
824 } else if (result->status == TX_RETRY_EXCEEDED) {
825 wl->stats.excessive_retries++;
826 retries = result->ack_failures;
829 info->status.rates[0].idx = rate;
830 info->status.rates[0].count = retries;
831 info->status.rates[0].flags = rate_flags;
832 info->status.ack_signal = -1;
834 wl->stats.retry_count += result->ack_failures;
837 * update sequence number only when relevant, i.e. only in
838 * sessions of TKIP, AES and GEM (not in open or WEP sessions)
840 if (info->control.hw_key &&
841 (info->control.hw_key->cipher == WLAN_CIPHER_SUITE_TKIP ||
842 info->control.hw_key->cipher == WLAN_CIPHER_SUITE_CCMP ||
843 info->control.hw_key->cipher == WL1271_CIPHER_SUITE_GEM)) {
844 u8 fw_lsb = result->tx_security_sequence_number_lsb;
845 u8 cur_lsb = wlvif->tx_security_last_seq_lsb;
848 * update security sequence number, taking care of potential
851 wlvif->tx_security_seq += (fw_lsb - cur_lsb) & 0xff;
852 wlvif->tx_security_last_seq_lsb = fw_lsb;
855 /* remove private header from packet */
856 skb_pull(skb, sizeof(struct wl1271_tx_hw_descr));
858 /* remove TKIP header space if present */
859 if ((wl->quirks & WLCORE_QUIRK_TKIP_HEADER_SPACE) &&
860 info->control.hw_key &&
861 info->control.hw_key->cipher == WLAN_CIPHER_SUITE_TKIP) {
862 int hdrlen = ieee80211_get_hdrlen_from_skb(skb);
863 memmove(skb->data + WL1271_EXTRA_SPACE_TKIP, skb->data,
865 skb_pull(skb, WL1271_EXTRA_SPACE_TKIP);
868 wl1271_debug(DEBUG_TX, "tx status id %u skb 0x%p failures %u rate 0x%x"
870 result->id, skb, result->ack_failures,
871 result->rate_class_index, result->status);
873 /* return the packet to the stack */
874 skb_queue_tail(&wl->deferred_tx_queue, skb);
875 queue_work(wl->freezable_wq, &wl->netstack_work);
876 wl1271_free_tx_id(wl, result->id);
879 /* Called upon reception of a TX complete interrupt */
880 void wl1271_tx_complete(struct wl1271 *wl)
882 struct wl1271_acx_mem_map *memmap = wl->target_mem_map;
883 u32 count, fw_counter;
886 /* read the tx results from the chipset */
887 wl1271_read(wl, le32_to_cpu(memmap->tx_result),
888 wl->tx_res_if, sizeof(*wl->tx_res_if), false);
889 fw_counter = le32_to_cpu(wl->tx_res_if->tx_result_fw_counter);
891 /* write host counter to chipset (to ack) */
892 wl1271_write32(wl, le32_to_cpu(memmap->tx_result) +
893 offsetof(struct wl1271_tx_hw_res_if,
894 tx_result_host_counter), fw_counter);
896 count = fw_counter - wl->tx_results_count;
897 wl1271_debug(DEBUG_TX, "tx_complete received, packets: %d", count);
899 /* verify that the result buffer is not getting overrun */
900 if (unlikely(count > TX_HW_RESULT_QUEUE_LEN))
901 wl1271_warning("TX result overflow from chipset: %d", count);
903 /* process the results */
904 for (i = 0; i < count; i++) {
905 struct wl1271_tx_hw_res_descr *result;
906 u8 offset = wl->tx_results_count & TX_HW_RESULT_QUEUE_LEN_MASK;
908 /* process the packet */
909 result = &(wl->tx_res_if->tx_results_queue[offset]);
910 wl1271_tx_complete_packet(wl, result);
912 wl->tx_results_count++;
915 EXPORT_SYMBOL(wl1271_tx_complete);
917 void wl1271_tx_reset_link_queues(struct wl1271 *wl, u8 hlid)
922 struct ieee80211_tx_info *info;
923 int total[NUM_TX_QUEUES];
925 for (i = 0; i < NUM_TX_QUEUES; i++) {
927 while ((skb = skb_dequeue(&wl->links[hlid].tx_queue[i]))) {
928 wl1271_debug(DEBUG_TX, "link freeing skb 0x%p", skb);
930 if (!wl12xx_is_dummy_packet(wl, skb)) {
931 info = IEEE80211_SKB_CB(skb);
932 info->status.rates[0].idx = -1;
933 info->status.rates[0].count = 0;
934 ieee80211_tx_status_ni(wl->hw, skb);
941 spin_lock_irqsave(&wl->wl_lock, flags);
942 for (i = 0; i < NUM_TX_QUEUES; i++)
943 wl->tx_queue_count[i] -= total[i];
944 spin_unlock_irqrestore(&wl->wl_lock, flags);
946 wl1271_handle_tx_low_watermark(wl);
949 /* caller must hold wl->mutex and TX must be stopped */
950 void wl12xx_tx_reset_wlvif(struct wl1271 *wl, struct wl12xx_vif *wlvif)
955 for_each_set_bit(i, wlvif->links_map, WL12XX_MAX_LINKS) {
956 if (wlvif->bss_type == BSS_TYPE_AP_BSS)
957 wl1271_free_sta(wl, wlvif, i);
959 wlvif->sta.ba_rx_bitmap = 0;
961 wl->links[i].allocated_pkts = 0;
962 wl->links[i].prev_freed_pkts = 0;
964 wlvif->last_tx_hlid = 0;
967 /* caller must hold wl->mutex and TX must be stopped */
968 void wl12xx_tx_reset(struct wl1271 *wl)
972 struct ieee80211_tx_info *info;
974 /* only reset the queues if something bad happened */
975 if (WARN_ON_ONCE(wl1271_tx_total_queue_count(wl) != 0)) {
976 for (i = 0; i < WL12XX_MAX_LINKS; i++)
977 wl1271_tx_reset_link_queues(wl, i);
979 for (i = 0; i < NUM_TX_QUEUES; i++)
980 wl->tx_queue_count[i] = 0;
984 * Make sure the driver is at a consistent state, in case this
985 * function is called from a context other than interface removal.
986 * This call will always wake the TX queues.
988 wl1271_handle_tx_low_watermark(wl);
990 for (i = 0; i < wl->num_tx_desc; i++) {
991 if (wl->tx_frames[i] == NULL)
994 skb = wl->tx_frames[i];
995 wl1271_free_tx_id(wl, i);
996 wl1271_debug(DEBUG_TX, "freeing skb 0x%p", skb);
998 if (!wl12xx_is_dummy_packet(wl, skb)) {
1000 * Remove private headers before passing the skb to
1003 info = IEEE80211_SKB_CB(skb);
1004 skb_pull(skb, sizeof(struct wl1271_tx_hw_descr));
1005 if ((wl->quirks & WLCORE_QUIRK_TKIP_HEADER_SPACE) &&
1006 info->control.hw_key &&
1007 info->control.hw_key->cipher ==
1008 WLAN_CIPHER_SUITE_TKIP) {
1009 int hdrlen = ieee80211_get_hdrlen_from_skb(skb);
1010 memmove(skb->data + WL1271_EXTRA_SPACE_TKIP,
1012 skb_pull(skb, WL1271_EXTRA_SPACE_TKIP);
1015 info->status.rates[0].idx = -1;
1016 info->status.rates[0].count = 0;
1018 ieee80211_tx_status_ni(wl->hw, skb);
1023 #define WL1271_TX_FLUSH_TIMEOUT 500000
1025 /* caller must *NOT* hold wl->mutex */
1026 void wl1271_tx_flush(struct wl1271 *wl)
1028 unsigned long timeout;
1030 timeout = jiffies + usecs_to_jiffies(WL1271_TX_FLUSH_TIMEOUT);
1032 /* only one flush should be in progress, for consistent queue state */
1033 mutex_lock(&wl->flush_mutex);
1035 wlcore_stop_queues(wl, WLCORE_QUEUE_STOP_REASON_FLUSH);
1037 while (!time_after(jiffies, timeout)) {
1038 mutex_lock(&wl->mutex);
1039 wl1271_debug(DEBUG_TX, "flushing tx buffer: %d %d",
1041 wl1271_tx_total_queue_count(wl));
1042 if ((wl->tx_frames_cnt == 0) &&
1043 (wl1271_tx_total_queue_count(wl) == 0)) {
1044 mutex_unlock(&wl->mutex);
1047 mutex_unlock(&wl->mutex);
1051 wl1271_warning("Unable to flush all TX buffers, timed out.");
1053 /* forcibly flush all Tx buffers on our queues */
1054 mutex_lock(&wl->mutex);
1055 for (i = 0; i < WL12XX_MAX_LINKS; i++)
1056 wl1271_tx_reset_link_queues(wl, i);
1057 mutex_unlock(&wl->mutex);
1060 wlcore_wake_queues(wl, WLCORE_QUEUE_STOP_REASON_FLUSH);
1061 mutex_unlock(&wl->flush_mutex);
1063 EXPORT_SYMBOL_GPL(wl1271_tx_flush);
1065 u32 wl1271_tx_min_rate_get(struct wl1271 *wl, u32 rate_set)
1067 if (WARN_ON(!rate_set))
1070 return BIT(__ffs(rate_set));
1073 void wlcore_stop_queue_locked(struct wl1271 *wl, u8 queue,
1074 enum wlcore_queue_stop_reason reason)
1076 bool stopped = !!wl->queue_stop_reasons[queue];
1078 /* queue should not be stopped for this reason */
1079 WARN_ON(test_and_set_bit(reason, &wl->queue_stop_reasons[queue]));
1084 ieee80211_stop_queue(wl->hw, wl1271_tx_get_mac80211_queue(queue));
1087 void wlcore_stop_queue(struct wl1271 *wl, u8 queue,
1088 enum wlcore_queue_stop_reason reason)
1090 unsigned long flags;
1092 spin_lock_irqsave(&wl->wl_lock, flags);
1093 wlcore_stop_queue_locked(wl, queue, reason);
1094 spin_unlock_irqrestore(&wl->wl_lock, flags);
1097 void wlcore_wake_queue(struct wl1271 *wl, u8 queue,
1098 enum wlcore_queue_stop_reason reason)
1100 unsigned long flags;
1102 spin_lock_irqsave(&wl->wl_lock, flags);
1104 /* queue should not be clear for this reason */
1105 WARN_ON(!test_and_clear_bit(reason, &wl->queue_stop_reasons[queue]));
1107 if (wl->queue_stop_reasons[queue])
1110 ieee80211_wake_queue(wl->hw, wl1271_tx_get_mac80211_queue(queue));
1113 spin_unlock_irqrestore(&wl->wl_lock, flags);
1116 void wlcore_stop_queues(struct wl1271 *wl,
1117 enum wlcore_queue_stop_reason reason)
1121 for (i = 0; i < NUM_TX_QUEUES; i++)
1122 wlcore_stop_queue(wl, i, reason);
1124 EXPORT_SYMBOL_GPL(wlcore_stop_queues);
1126 void wlcore_wake_queues(struct wl1271 *wl,
1127 enum wlcore_queue_stop_reason reason)
1131 for (i = 0; i < NUM_TX_QUEUES; i++)
1132 wlcore_wake_queue(wl, i, reason);
1134 EXPORT_SYMBOL_GPL(wlcore_wake_queues);
1136 void wlcore_reset_stopped_queues(struct wl1271 *wl)
1139 unsigned long flags;
1141 spin_lock_irqsave(&wl->wl_lock, flags);
1143 for (i = 0; i < NUM_TX_QUEUES; i++) {
1144 if (!wl->queue_stop_reasons[i])
1147 wl->queue_stop_reasons[i] = 0;
1148 ieee80211_wake_queue(wl->hw,
1149 wl1271_tx_get_mac80211_queue(i));
1152 spin_unlock_irqrestore(&wl->wl_lock, flags);
1155 bool wlcore_is_queue_stopped_by_reason(struct wl1271 *wl, u8 queue,
1156 enum wlcore_queue_stop_reason reason)
1158 return test_bit(reason, &wl->queue_stop_reasons[queue]);
1161 bool wlcore_is_queue_stopped(struct wl1271 *wl, u8 queue)
1163 return !!wl->queue_stop_reasons[queue];