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>
36 static int wl1271_set_default_wep_key(struct wl1271 *wl,
37 struct wl12xx_vif *wlvif, u8 id)
40 bool is_ap = (wlvif->bss_type == BSS_TYPE_AP_BSS);
43 ret = wl12xx_cmd_set_default_wep_key(wl, id,
44 wlvif->ap.bcast_hlid);
46 ret = wl12xx_cmd_set_default_wep_key(wl, id, wlvif->sta.hlid);
51 wl1271_debug(DEBUG_CRYPT, "default wep key idx: %d", (int)id);
55 static int wl1271_alloc_tx_id(struct wl1271 *wl, struct sk_buff *skb)
59 id = find_first_zero_bit(wl->tx_frames_map, ACX_TX_DESCRIPTORS);
60 if (id >= ACX_TX_DESCRIPTORS)
63 __set_bit(id, wl->tx_frames_map);
64 wl->tx_frames[id] = skb;
69 static void wl1271_free_tx_id(struct wl1271 *wl, int id)
71 if (__test_and_clear_bit(id, wl->tx_frames_map)) {
72 if (unlikely(wl->tx_frames_cnt == ACX_TX_DESCRIPTORS))
73 clear_bit(WL1271_FLAG_FW_TX_BUSY, &wl->flags);
75 wl->tx_frames[id] = NULL;
80 static int wl1271_tx_update_filters(struct wl1271 *wl,
81 struct wl12xx_vif *wlvif,
84 struct ieee80211_hdr *hdr;
87 hdr = (struct ieee80211_hdr *)skb->data;
90 * stop bssid-based filtering before transmitting authentication
91 * requests. this way the hw will never drop authentication
92 * responses coming from BSSIDs it isn't familiar with (e.g. on
95 if (!ieee80211_is_auth(hdr->frame_control))
98 if (wlvif->dev_hlid != WL12XX_INVALID_LINK_ID)
101 wl1271_debug(DEBUG_CMD, "starting device role for roaming");
102 ret = wl12xx_start_dev(wl, wlvif);
109 static void wl1271_tx_ap_update_inconnection_sta(struct wl1271 *wl,
112 struct ieee80211_hdr *hdr;
115 * add the station to the known list before transmitting the
116 * authentication response. this way it won't get de-authed by FW
117 * when transmitting too soon.
119 hdr = (struct ieee80211_hdr *)(skb->data +
120 sizeof(struct wl1271_tx_hw_descr));
121 if (ieee80211_is_auth(hdr->frame_control))
122 wl1271_acx_set_inconnection_sta(wl, hdr->addr1);
125 static void wl1271_tx_regulate_link(struct wl1271 *wl,
126 struct wl12xx_vif *wlvif,
129 bool fw_ps, single_sta;
132 if (WARN_ON(!test_bit(hlid, wlvif->links_map)))
135 fw_ps = test_bit(hlid, (unsigned long *)&wl->ap_fw_ps_map);
136 tx_pkts = wl->links[hlid].allocated_pkts;
137 single_sta = (wl->active_sta_count == 1);
140 * if in FW PS and there is enough data in FW we can put the link
141 * into high-level PS and clean out its TX queues.
142 * Make an exception if this is the only connected station. In this
143 * case FW-memory congestion is not a problem.
145 if (!single_sta && fw_ps && tx_pkts >= WL1271_PS_STA_MAX_PACKETS)
146 wl12xx_ps_link_start(wl, wlvif, hlid, true);
149 bool wl12xx_is_dummy_packet(struct wl1271 *wl, struct sk_buff *skb)
151 return wl->dummy_packet == skb;
154 u8 wl12xx_tx_get_hlid_ap(struct wl1271 *wl, struct wl12xx_vif *wlvif,
157 struct ieee80211_tx_info *control = IEEE80211_SKB_CB(skb);
159 if (control->control.sta) {
160 struct wl1271_station *wl_sta;
162 wl_sta = (struct wl1271_station *)
163 control->control.sta->drv_priv;
166 struct ieee80211_hdr *hdr;
168 if (!test_bit(WLVIF_FLAG_AP_STARTED, &wlvif->flags))
169 return wl->system_hlid;
171 hdr = (struct ieee80211_hdr *)skb->data;
172 if (ieee80211_is_mgmt(hdr->frame_control))
173 return wlvif->ap.global_hlid;
175 return wlvif->ap.bcast_hlid;
179 u8 wl12xx_tx_get_hlid(struct wl1271 *wl, struct wl12xx_vif *wlvif,
182 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
184 if (!wlvif || wl12xx_is_dummy_packet(wl, skb))
185 return wl->system_hlid;
187 if (wlvif->bss_type == BSS_TYPE_AP_BSS)
188 return wl12xx_tx_get_hlid_ap(wl, wlvif, skb);
190 wl1271_tx_update_filters(wl, wlvif, skb);
192 if ((test_bit(WLVIF_FLAG_STA_ASSOCIATED, &wlvif->flags) ||
193 test_bit(WLVIF_FLAG_IBSS_JOINED, &wlvif->flags)) &&
194 !ieee80211_is_auth(hdr->frame_control) &&
195 !ieee80211_is_assoc_req(hdr->frame_control))
196 return wlvif->sta.hlid;
198 return wlvif->dev_hlid;
201 static unsigned int wl12xx_calc_packet_alignment(struct wl1271 *wl,
202 unsigned int packet_length)
204 if (wl->quirks & WL12XX_QUIRK_NO_BLOCKSIZE_ALIGNMENT)
205 return ALIGN(packet_length, WL1271_TX_ALIGN_TO);
207 return ALIGN(packet_length, WL12XX_BUS_BLOCK_SIZE);
210 static int wl1271_tx_allocate(struct wl1271 *wl, struct wl12xx_vif *wlvif,
211 struct sk_buff *skb, u32 extra, u32 buf_offset,
214 struct wl1271_tx_hw_descr *desc;
215 u32 total_len = skb->len + sizeof(struct wl1271_tx_hw_descr) + extra;
218 int id, ret = -EBUSY, ac;
219 u32 spare_blocks = wl->tx_spare_blocks;
220 bool is_dummy = false;
222 if (buf_offset + total_len > WL1271_AGGR_BUFFER_SIZE)
225 /* allocate free identifier for the packet */
226 id = wl1271_alloc_tx_id(wl, skb);
230 /* approximate the number of blocks required for this packet
232 len = wl12xx_calc_packet_alignment(wl, total_len);
234 /* in case of a dummy packet, use default amount of spare mem blocks */
235 if (unlikely(wl12xx_is_dummy_packet(wl, skb))) {
237 spare_blocks = TX_HW_BLOCK_SPARE_DEFAULT;
240 total_blocks = (len + TX_HW_BLOCK_SIZE - 1) / TX_HW_BLOCK_SIZE +
243 if (total_blocks <= wl->tx_blocks_available) {
244 desc = (struct wl1271_tx_hw_descr *)skb_push(
245 skb, total_len - skb->len);
247 /* HW descriptor fields change between wl127x and wl128x */
248 if (wl->chip.id == CHIP_ID_1283_PG20) {
249 desc->wl128x_mem.total_mem_blocks = total_blocks;
251 desc->wl127x_mem.extra_blocks = spare_blocks;
252 desc->wl127x_mem.total_mem_blocks = total_blocks;
257 wl->tx_blocks_available -= total_blocks;
258 wl->tx_allocated_blocks += total_blocks;
260 ac = wl1271_tx_get_queue(skb_get_queue_mapping(skb));
261 wl->tx_allocated_pkts[ac]++;
263 if (!is_dummy && wlvif &&
264 wlvif->bss_type == BSS_TYPE_AP_BSS &&
265 test_bit(hlid, wlvif->ap.sta_hlid_map))
266 wl->links[hlid].allocated_pkts++;
270 wl1271_debug(DEBUG_TX,
271 "tx_allocate: size: %d, blocks: %d, id: %d",
272 total_len, total_blocks, id);
274 wl1271_free_tx_id(wl, id);
280 static void wl1271_tx_fill_hdr(struct wl1271 *wl, struct wl12xx_vif *wlvif,
281 struct sk_buff *skb, u32 extra,
282 struct ieee80211_tx_info *control, u8 hlid)
285 struct wl1271_tx_hw_descr *desc;
286 int aligned_len, ac, rate_idx;
291 desc = (struct wl1271_tx_hw_descr *) skb->data;
293 /* relocate space for security header */
295 void *framestart = skb->data + sizeof(*desc);
296 u16 fc = *(u16 *)(framestart + extra);
297 int hdrlen = ieee80211_hdrlen(cpu_to_le16(fc));
298 memmove(framestart, framestart + extra, hdrlen);
301 /* configure packet life time */
303 hosttime = (timespec_to_ns(&ts) >> 10);
304 desc->start_time = cpu_to_le32(hosttime - wl->time_offset);
306 is_dummy = wl12xx_is_dummy_packet(wl, skb);
307 if (is_dummy || !wlvif || wlvif->bss_type != BSS_TYPE_AP_BSS)
308 desc->life_time = cpu_to_le16(TX_HW_MGMT_PKT_LIFETIME_TU);
310 desc->life_time = cpu_to_le16(TX_HW_AP_MODE_PKT_LIFETIME_TU);
313 ac = wl1271_tx_get_queue(skb_get_queue_mapping(skb));
314 desc->tid = skb->priority;
318 * FW expects the dummy packet to have an invalid session id -
319 * any session id that is different than the one set in the join
321 tx_attr = (SESSION_COUNTER_INVALID <<
322 TX_HW_ATTR_OFST_SESSION_COUNTER) &
323 TX_HW_ATTR_SESSION_COUNTER;
325 tx_attr |= TX_HW_ATTR_TX_DUMMY_REQ;
327 /* configure the tx attributes */
328 tx_attr = wlvif->session_counter <<
329 TX_HW_ATTR_OFST_SESSION_COUNTER;
333 if (is_dummy || !wlvif)
335 else if (wlvif->bss_type != BSS_TYPE_AP_BSS) {
336 /* if the packets are destined for AP (have a STA entry)
337 send them with AP rate policies, otherwise use default
339 if (control->flags & IEEE80211_TX_CTL_NO_CCK_RATE)
340 rate_idx = wlvif->sta.p2p_rate_idx;
341 else if (control->control.sta)
342 rate_idx = wlvif->sta.ap_rate_idx;
344 rate_idx = wlvif->sta.basic_rate_idx;
346 if (hlid == wlvif->ap.global_hlid)
347 rate_idx = wlvif->ap.mgmt_rate_idx;
348 else if (hlid == wlvif->ap.bcast_hlid)
349 rate_idx = wlvif->ap.bcast_rate_idx;
351 rate_idx = wlvif->ap.ucast_rate_idx[ac];
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 && 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 = wl->last_wlvif;
594 struct sk_buff *skb = NULL;
597 wl12xx_for_each_wlvif_continue(wl, wlvif) {
598 skb = wl12xx_vif_skb_dequeue(wl, wlvif);
600 wl->last_wlvif = wlvif;
606 /* do another pass */
608 wl12xx_for_each_wlvif(wl, wlvif) {
609 skb = wl12xx_vif_skb_dequeue(wl, wlvif);
611 wl->last_wlvif = wlvif;
618 skb = wl12xx_lnk_skb_dequeue(wl, &wl->links[wl->system_hlid]);
621 test_and_clear_bit(WL1271_FLAG_DUMMY_PACKET_PENDING, &wl->flags)) {
624 skb = wl->dummy_packet;
625 q = wl1271_tx_get_queue(skb_get_queue_mapping(skb));
626 spin_lock_irqsave(&wl->wl_lock, flags);
627 wl->tx_queue_count[q]--;
628 spin_unlock_irqrestore(&wl->wl_lock, flags);
634 static void wl1271_skb_queue_head(struct wl1271 *wl, struct wl12xx_vif *wlvif,
638 int q = wl1271_tx_get_queue(skb_get_queue_mapping(skb));
640 if (wl12xx_is_dummy_packet(wl, skb)) {
641 set_bit(WL1271_FLAG_DUMMY_PACKET_PENDING, &wl->flags);
643 u8 hlid = wl12xx_tx_get_hlid(wl, wlvif, skb);
644 skb_queue_head(&wl->links[hlid].tx_queue[q], skb);
646 /* make sure we dequeue the same packet next time */
647 wlvif->last_tx_hlid = (hlid + WL12XX_MAX_LINKS - 1) %
651 spin_lock_irqsave(&wl->wl_lock, flags);
652 wl->tx_queue_count[q]++;
653 spin_unlock_irqrestore(&wl->wl_lock, flags);
656 static bool wl1271_tx_is_data_present(struct sk_buff *skb)
658 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)(skb->data);
660 return ieee80211_is_data_present(hdr->frame_control);
663 void wl12xx_rearm_rx_streaming(struct wl1271 *wl, unsigned long *active_hlids)
665 struct wl12xx_vif *wlvif;
669 if (!wl->conf.rx_streaming.interval)
672 if (!wl->conf.rx_streaming.always &&
673 !test_bit(WL1271_FLAG_SOFT_GEMINI, &wl->flags))
676 timeout = wl->conf.rx_streaming.duration;
677 wl12xx_for_each_wlvif_sta(wl, wlvif) {
679 for_each_set_bit(hlid, active_hlids, WL12XX_MAX_LINKS) {
680 if (test_bit(hlid, wlvif->links_map)) {
689 /* enable rx streaming */
690 if (!test_bit(WLVIF_FLAG_RX_STREAMING_STARTED, &wlvif->flags))
691 ieee80211_queue_work(wl->hw,
692 &wlvif->rx_streaming_enable_work);
694 mod_timer(&wlvif->rx_streaming_timer,
695 jiffies + msecs_to_jiffies(timeout));
699 void wl1271_tx_work_locked(struct wl1271 *wl)
701 struct wl12xx_vif *wlvif;
703 struct wl1271_tx_hw_descr *desc;
705 bool sent_packets = false;
706 unsigned long active_hlids[BITS_TO_LONGS(WL12XX_MAX_LINKS)] = {0};
709 if (unlikely(wl->state == WL1271_STATE_OFF))
712 while ((skb = wl1271_skb_dequeue(wl))) {
713 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
714 bool has_data = false;
717 if (!wl12xx_is_dummy_packet(wl, skb) && info->control.vif)
718 wlvif = wl12xx_vif_to_data(info->control.vif);
720 has_data = wlvif && wl1271_tx_is_data_present(skb);
721 ret = wl1271_prepare_tx_frame(wl, wlvif, skb, buf_offset);
722 if (ret == -EAGAIN) {
724 * Aggregation buffer is full.
725 * Flush buffer and try again.
727 wl1271_skb_queue_head(wl, wlvif, skb);
728 wl1271_write(wl, WL1271_SLV_MEM_DATA, wl->aggr_buf,
733 } else if (ret == -EBUSY) {
735 * Firmware buffer is full.
736 * Queue back last skb, and stop aggregating.
738 wl1271_skb_queue_head(wl, wlvif, skb);
739 /* No work left, avoid scheduling redundant tx work */
740 set_bit(WL1271_FLAG_FW_TX_BUSY, &wl->flags);
742 } else if (ret < 0) {
743 if (wl12xx_is_dummy_packet(wl, skb))
745 * fw still expects dummy packet,
748 wl1271_skb_queue_head(wl, wlvif, skb);
750 ieee80211_free_txskb(wl->hw, skb);
754 wl->tx_packets_count++;
756 desc = (struct wl1271_tx_hw_descr *) skb->data;
757 __set_bit(desc->hlid, active_hlids);
763 wl1271_write(wl, WL1271_SLV_MEM_DATA, wl->aggr_buf,
769 * Interrupt the firmware with the new packets. This is only
770 * required for older hardware revisions
772 if (wl->quirks & WL12XX_QUIRK_END_OF_TRANSACTION)
773 wl1271_write32(wl, WL1271_HOST_WR_ACCESS,
774 wl->tx_packets_count);
776 wl1271_handle_tx_low_watermark(wl);
778 wl12xx_rearm_rx_streaming(wl, active_hlids);
781 void wl1271_tx_work(struct work_struct *work)
783 struct wl1271 *wl = container_of(work, struct wl1271, tx_work);
786 mutex_lock(&wl->mutex);
787 ret = wl1271_ps_elp_wakeup(wl);
791 wl1271_tx_work_locked(wl);
793 wl1271_ps_elp_sleep(wl);
795 mutex_unlock(&wl->mutex);
798 static void wl1271_tx_complete_packet(struct wl1271 *wl,
799 struct wl1271_tx_hw_res_descr *result)
801 struct ieee80211_tx_info *info;
802 struct ieee80211_vif *vif;
803 struct wl12xx_vif *wlvif;
809 /* check for id legality */
810 if (unlikely(id >= ACX_TX_DESCRIPTORS || wl->tx_frames[id] == NULL)) {
811 wl1271_warning("TX result illegal id: %d", id);
815 skb = wl->tx_frames[id];
816 info = IEEE80211_SKB_CB(skb);
818 if (wl12xx_is_dummy_packet(wl, skb)) {
819 wl1271_free_tx_id(wl, id);
823 /* info->control is valid as long as we don't update info->status */
824 vif = info->control.vif;
825 wlvif = wl12xx_vif_to_data(vif);
827 /* update the TX status info */
828 if (result->status == TX_SUCCESS) {
829 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK))
830 info->flags |= IEEE80211_TX_STAT_ACK;
831 rate = wl1271_rate_to_idx(result->rate_class_index,
833 retries = result->ack_failures;
834 } else if (result->status == TX_RETRY_EXCEEDED) {
835 wl->stats.excessive_retries++;
836 retries = result->ack_failures;
839 info->status.rates[0].idx = rate;
840 info->status.rates[0].count = retries;
841 info->status.rates[0].flags = 0;
842 info->status.ack_signal = -1;
844 wl->stats.retry_count += result->ack_failures;
847 * update sequence number only when relevant, i.e. only in
848 * sessions of TKIP, AES and GEM (not in open or WEP sessions)
850 if (info->control.hw_key &&
851 (info->control.hw_key->cipher == WLAN_CIPHER_SUITE_TKIP ||
852 info->control.hw_key->cipher == WLAN_CIPHER_SUITE_CCMP ||
853 info->control.hw_key->cipher == WL1271_CIPHER_SUITE_GEM)) {
854 u8 fw_lsb = result->tx_security_sequence_number_lsb;
855 u8 cur_lsb = wlvif->tx_security_last_seq_lsb;
858 * update security sequence number, taking care of potential
861 wlvif->tx_security_seq += (fw_lsb - cur_lsb) & 0xff;
862 wlvif->tx_security_last_seq_lsb = fw_lsb;
865 /* remove private header from packet */
866 skb_pull(skb, sizeof(struct wl1271_tx_hw_descr));
868 /* remove TKIP header space if present */
869 if (info->control.hw_key &&
870 info->control.hw_key->cipher == WLAN_CIPHER_SUITE_TKIP) {
871 int hdrlen = ieee80211_get_hdrlen_from_skb(skb);
872 memmove(skb->data + WL1271_TKIP_IV_SPACE, skb->data, hdrlen);
873 skb_pull(skb, WL1271_TKIP_IV_SPACE);
876 wl1271_debug(DEBUG_TX, "tx status id %u skb 0x%p failures %u rate 0x%x"
878 result->id, skb, result->ack_failures,
879 result->rate_class_index, result->status);
881 /* return the packet to the stack */
882 skb_queue_tail(&wl->deferred_tx_queue, skb);
883 queue_work(wl->freezable_wq, &wl->netstack_work);
884 wl1271_free_tx_id(wl, result->id);
887 /* Called upon reception of a TX complete interrupt */
888 void wl1271_tx_complete(struct wl1271 *wl)
890 struct wl1271_acx_mem_map *memmap =
891 (struct wl1271_acx_mem_map *)wl->target_mem_map;
892 u32 count, fw_counter;
895 /* read the tx results from the chipset */
896 wl1271_read(wl, le32_to_cpu(memmap->tx_result),
897 wl->tx_res_if, sizeof(*wl->tx_res_if), false);
898 fw_counter = le32_to_cpu(wl->tx_res_if->tx_result_fw_counter);
900 /* write host counter to chipset (to ack) */
901 wl1271_write32(wl, le32_to_cpu(memmap->tx_result) +
902 offsetof(struct wl1271_tx_hw_res_if,
903 tx_result_host_counter), fw_counter);
905 count = fw_counter - wl->tx_results_count;
906 wl1271_debug(DEBUG_TX, "tx_complete received, packets: %d", count);
908 /* verify that the result buffer is not getting overrun */
909 if (unlikely(count > TX_HW_RESULT_QUEUE_LEN))
910 wl1271_warning("TX result overflow from chipset: %d", count);
912 /* process the results */
913 for (i = 0; i < count; i++) {
914 struct wl1271_tx_hw_res_descr *result;
915 u8 offset = wl->tx_results_count & TX_HW_RESULT_QUEUE_LEN_MASK;
917 /* process the packet */
918 result = &(wl->tx_res_if->tx_results_queue[offset]);
919 wl1271_tx_complete_packet(wl, result);
921 wl->tx_results_count++;
925 void wl1271_tx_reset_link_queues(struct wl1271 *wl, u8 hlid)
930 struct ieee80211_tx_info *info;
931 int total[NUM_TX_QUEUES];
933 for (i = 0; i < NUM_TX_QUEUES; i++) {
935 while ((skb = skb_dequeue(&wl->links[hlid].tx_queue[i]))) {
936 wl1271_debug(DEBUG_TX, "link freeing skb 0x%p", skb);
938 if (!wl12xx_is_dummy_packet(wl, skb)) {
939 info = IEEE80211_SKB_CB(skb);
940 info->status.rates[0].idx = -1;
941 info->status.rates[0].count = 0;
942 ieee80211_tx_status_ni(wl->hw, skb);
949 spin_lock_irqsave(&wl->wl_lock, flags);
950 for (i = 0; i < NUM_TX_QUEUES; i++)
951 wl->tx_queue_count[i] -= total[i];
952 spin_unlock_irqrestore(&wl->wl_lock, flags);
954 wl1271_handle_tx_low_watermark(wl);
957 /* caller must hold wl->mutex and TX must be stopped */
958 void wl12xx_tx_reset_wlvif(struct wl1271 *wl, struct wl12xx_vif *wlvif)
963 for_each_set_bit(i, wlvif->links_map, WL12XX_MAX_LINKS) {
964 if (wlvif->bss_type == BSS_TYPE_AP_BSS)
965 wl1271_free_sta(wl, wlvif, i);
967 wlvif->sta.ba_rx_bitmap = 0;
969 wl1271_tx_reset_link_queues(wl, i);
970 wl->links[i].allocated_pkts = 0;
971 wl->links[i].prev_freed_pkts = 0;
973 wlvif->last_tx_hlid = 0;
976 /* caller must hold wl->mutex and TX must be stopped */
977 void wl12xx_tx_reset(struct wl1271 *wl, bool reset_tx_queues)
981 struct ieee80211_tx_info *info;
983 for (i = 0; i < NUM_TX_QUEUES; i++)
984 wl->tx_queue_count[i] = 0;
986 wl->stopped_queues_map = 0;
989 * Make sure the driver is at a consistent state, in case this
990 * function is called from a context other than interface removal.
991 * This call will always wake the TX queues.
994 wl1271_handle_tx_low_watermark(wl);
996 for (i = 0; i < ACX_TX_DESCRIPTORS; i++) {
997 if (wl->tx_frames[i] == NULL)
1000 skb = wl->tx_frames[i];
1001 wl1271_free_tx_id(wl, i);
1002 wl1271_debug(DEBUG_TX, "freeing skb 0x%p", skb);
1004 if (!wl12xx_is_dummy_packet(wl, skb)) {
1006 * Remove private headers before passing the skb to
1009 info = IEEE80211_SKB_CB(skb);
1010 skb_pull(skb, sizeof(struct wl1271_tx_hw_descr));
1011 if (info->control.hw_key &&
1012 info->control.hw_key->cipher ==
1013 WLAN_CIPHER_SUITE_TKIP) {
1014 int hdrlen = ieee80211_get_hdrlen_from_skb(skb);
1015 memmove(skb->data + WL1271_TKIP_IV_SPACE,
1017 skb_pull(skb, WL1271_TKIP_IV_SPACE);
1020 info->status.rates[0].idx = -1;
1021 info->status.rates[0].count = 0;
1023 ieee80211_tx_status_ni(wl->hw, skb);
1028 #define WL1271_TX_FLUSH_TIMEOUT 500000
1030 /* caller must *NOT* hold wl->mutex */
1031 void wl1271_tx_flush(struct wl1271 *wl)
1033 unsigned long timeout;
1034 timeout = jiffies + usecs_to_jiffies(WL1271_TX_FLUSH_TIMEOUT);
1036 while (!time_after(jiffies, timeout)) {
1037 mutex_lock(&wl->mutex);
1038 wl1271_debug(DEBUG_TX, "flushing tx buffer: %d %d",
1040 wl1271_tx_total_queue_count(wl));
1041 if ((wl->tx_frames_cnt == 0) &&
1042 (wl1271_tx_total_queue_count(wl) == 0)) {
1043 mutex_unlock(&wl->mutex);
1046 mutex_unlock(&wl->mutex);
1050 wl1271_warning("Unable to flush all TX buffers, timed out.");
1053 u32 wl1271_tx_min_rate_get(struct wl1271 *wl, u32 rate_set)
1055 if (WARN_ON(!rate_set))
1058 return BIT(__ffs(rate_set));