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>
34 static int wl1271_set_default_wep_key(struct wl1271 *wl, u8 id)
37 bool is_ap = (wl->bss_type == BSS_TYPE_AP_BSS);
40 ret = wl1271_cmd_set_ap_default_wep_key(wl, id);
42 ret = wl1271_cmd_set_sta_default_wep_key(wl, id);
47 wl1271_debug(DEBUG_CRYPT, "default wep key idx: %d", (int)id);
51 static int wl1271_alloc_tx_id(struct wl1271 *wl, struct sk_buff *skb)
55 id = find_first_zero_bit(wl->tx_frames_map, ACX_TX_DESCRIPTORS);
56 if (id >= ACX_TX_DESCRIPTORS)
59 __set_bit(id, wl->tx_frames_map);
60 wl->tx_frames[id] = skb;
65 static void wl1271_free_tx_id(struct wl1271 *wl, int id)
67 if (__test_and_clear_bit(id, wl->tx_frames_map)) {
68 if (unlikely(wl->tx_frames_cnt == ACX_TX_DESCRIPTORS))
69 clear_bit(WL1271_FLAG_FW_TX_BUSY, &wl->flags);
71 wl->tx_frames[id] = NULL;
76 static int wl1271_tx_update_filters(struct wl1271 *wl,
79 struct ieee80211_hdr *hdr;
81 hdr = (struct ieee80211_hdr *)(skb->data +
82 sizeof(struct wl1271_tx_hw_descr));
85 * stop bssid-based filtering before transmitting authentication
86 * requests. this way the hw will never drop authentication
87 * responses coming from BSSIDs it isn't familiar with (e.g. on
90 if (!ieee80211_is_auth(hdr->frame_control))
93 wl1271_configure_filters(wl, FIF_OTHER_BSS);
95 return wl1271_acx_rx_config(wl, wl->rx_config, wl->rx_filter);
98 static void wl1271_tx_ap_update_inconnection_sta(struct wl1271 *wl,
101 struct ieee80211_hdr *hdr;
104 * add the station to the known list before transmitting the
105 * authentication response. this way it won't get de-authed by FW
106 * when transmitting too soon.
108 hdr = (struct ieee80211_hdr *)(skb->data +
109 sizeof(struct wl1271_tx_hw_descr));
110 if (ieee80211_is_auth(hdr->frame_control))
111 wl1271_acx_set_inconnection_sta(wl, hdr->addr1);
114 static void wl1271_tx_regulate_link(struct wl1271 *wl, u8 hlid)
119 /* only regulate station links */
120 if (hlid < WL1271_AP_STA_HLID_START)
123 fw_ps = test_bit(hlid, (unsigned long *)&wl->ap_fw_ps_map);
124 tx_blks = wl->links[hlid].allocated_blks;
127 * if in FW PS and there is enough data in FW we can put the link
128 * into high-level PS and clean out its TX queues.
130 if (fw_ps && tx_blks >= WL1271_PS_STA_MAX_BLOCKS)
131 wl1271_ps_link_start(wl, hlid, true);
134 u8 wl1271_tx_get_hlid(struct sk_buff *skb)
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 hdr = (struct ieee80211_hdr *)skb->data;
148 if (ieee80211_is_mgmt(hdr->frame_control))
149 return WL1271_AP_GLOBAL_HLID;
151 return WL1271_AP_BROADCAST_HLID;
155 static unsigned int wl12xx_calc_packet_alignment(struct wl1271 *wl,
156 unsigned int packet_length)
158 if (wl->quirks & WL12XX_QUIRK_BLOCKSIZE_ALIGNMENT)
159 return ALIGN(packet_length, WL12XX_BUS_BLOCK_SIZE);
161 return ALIGN(packet_length, WL1271_TX_ALIGN_TO);
164 static int wl1271_tx_allocate(struct wl1271 *wl, struct sk_buff *skb, u32 extra,
165 u32 buf_offset, u8 hlid)
167 struct wl1271_tx_hw_descr *desc;
168 u32 total_len = skb->len + sizeof(struct wl1271_tx_hw_descr) + extra;
171 int id, ret = -EBUSY;
174 if (unlikely(wl->quirks & WL12XX_QUIRK_USE_2_SPARE_BLOCKS))
179 if (buf_offset + total_len > WL1271_AGGR_BUFFER_SIZE)
182 /* allocate free identifier for the packet */
183 id = wl1271_alloc_tx_id(wl, skb);
187 /* approximate the number of blocks required for this packet
189 len = wl12xx_calc_packet_alignment(wl, total_len);
191 total_blocks = (len + TX_HW_BLOCK_SIZE - 1) / TX_HW_BLOCK_SIZE +
194 if (total_blocks <= wl->tx_blocks_available) {
195 desc = (struct wl1271_tx_hw_descr *)skb_push(
196 skb, total_len - skb->len);
198 /* HW descriptor fields change between wl127x and wl128x */
199 if (wl->chip.id == CHIP_ID_1283_PG20) {
200 desc->wl128x_mem.total_mem_blocks = total_blocks;
202 desc->wl127x_mem.extra_blocks = spare_blocks;
203 desc->wl127x_mem.total_mem_blocks = total_blocks;
208 wl->tx_blocks_available -= total_blocks;
209 wl->tx_allocated_blocks += total_blocks;
211 if (wl->bss_type == BSS_TYPE_AP_BSS)
212 wl->links[hlid].allocated_blks += total_blocks;
216 wl1271_debug(DEBUG_TX,
217 "tx_allocate: size: %d, blocks: %d, id: %d",
218 total_len, total_blocks, id);
220 wl1271_free_tx_id(wl, id);
226 static bool wl12xx_is_dummy_packet(struct wl1271 *wl, struct sk_buff *skb)
228 return wl->dummy_packet == skb;
231 static void wl1271_tx_fill_hdr(struct wl1271 *wl, struct sk_buff *skb,
232 u32 extra, struct ieee80211_tx_info *control,
236 struct wl1271_tx_hw_descr *desc;
237 int aligned_len, ac, rate_idx;
241 desc = (struct wl1271_tx_hw_descr *) skb->data;
243 /* relocate space for security header */
245 void *framestart = skb->data + sizeof(*desc);
246 u16 fc = *(u16 *)(framestart + extra);
247 int hdrlen = ieee80211_hdrlen(cpu_to_le16(fc));
248 memmove(framestart, framestart + extra, hdrlen);
251 /* configure packet life time */
253 hosttime = (timespec_to_ns(&ts) >> 10);
254 desc->start_time = cpu_to_le32(hosttime - wl->time_offset);
256 if (wl->bss_type != BSS_TYPE_AP_BSS)
257 desc->life_time = cpu_to_le16(TX_HW_MGMT_PKT_LIFETIME_TU);
259 desc->life_time = cpu_to_le16(TX_HW_AP_MODE_PKT_LIFETIME_TU);
262 ac = wl1271_tx_get_queue(skb_get_queue_mapping(skb));
263 desc->tid = skb->priority;
265 if (wl12xx_is_dummy_packet(wl, skb)) {
267 * FW expects the dummy packet to have an invalid session id -
268 * any session id that is different than the one set in the join
270 tx_attr = ((~wl->session_counter) <<
271 TX_HW_ATTR_OFST_SESSION_COUNTER) &
272 TX_HW_ATTR_SESSION_COUNTER;
274 tx_attr |= TX_HW_ATTR_TX_DUMMY_REQ;
276 /* configure the tx attributes */
278 wl->session_counter << TX_HW_ATTR_OFST_SESSION_COUNTER;
281 if (wl->bss_type != BSS_TYPE_AP_BSS) {
284 /* if the packets are destined for AP (have a STA entry)
285 send them with AP rate policies, otherwise use default
287 if (control->control.sta)
288 rate_idx = ACX_TX_AP_FULL_RATE;
290 rate_idx = ACX_TX_BASIC_RATE;
294 case WL1271_AP_GLOBAL_HLID:
295 rate_idx = ACX_TX_AP_MODE_MGMT_RATE;
297 case WL1271_AP_BROADCAST_HLID:
298 rate_idx = ACX_TX_AP_MODE_BCST_RATE;
306 tx_attr |= rate_idx << TX_HW_ATTR_OFST_RATE_POLICY;
309 aligned_len = wl12xx_calc_packet_alignment(wl, skb->len);
311 if (wl->chip.id == CHIP_ID_1283_PG20) {
312 desc->wl128x_mem.extra_bytes = aligned_len - skb->len;
313 desc->length = cpu_to_le16(aligned_len >> 2);
315 wl1271_debug(DEBUG_TX, "tx_fill_hdr: hlid: %d "
316 "tx_attr: 0x%x len: %d life: %d mem: %d",
318 le16_to_cpu(desc->length),
319 le16_to_cpu(desc->life_time),
320 desc->wl128x_mem.total_mem_blocks);
324 /* Store the aligned length in terms of words */
325 desc->length = cpu_to_le16(aligned_len >> 2);
327 /* calculate number of padding bytes */
328 pad = aligned_len - skb->len;
329 tx_attr |= pad << TX_HW_ATTR_OFST_LAST_WORD_PAD;
331 wl1271_debug(DEBUG_TX, "tx_fill_hdr: pad: %d hlid: %d "
332 "tx_attr: 0x%x len: %d life: %d mem: %d", pad,
334 le16_to_cpu(desc->length),
335 le16_to_cpu(desc->life_time),
336 desc->wl127x_mem.total_mem_blocks);
339 desc->tx_attr = cpu_to_le16(tx_attr);
342 /* caller must hold wl->mutex */
343 static int wl1271_prepare_tx_frame(struct wl1271 *wl, struct sk_buff *skb,
346 struct ieee80211_tx_info *info;
355 info = IEEE80211_SKB_CB(skb);
357 if (info->control.hw_key &&
358 info->control.hw_key->cipher == WLAN_CIPHER_SUITE_TKIP)
359 extra = WL1271_TKIP_IV_SPACE;
361 if (info->control.hw_key) {
363 u8 idx = info->control.hw_key->hw_key_idx;
364 u32 cipher = info->control.hw_key->cipher;
366 is_wep = (cipher == WLAN_CIPHER_SUITE_WEP40) ||
367 (cipher == WLAN_CIPHER_SUITE_WEP104);
369 if (unlikely(is_wep && wl->default_key != idx)) {
370 ret = wl1271_set_default_wep_key(wl, idx);
373 wl->default_key = idx;
377 if (wl->bss_type == BSS_TYPE_AP_BSS)
378 hlid = wl1271_tx_get_hlid(skb);
380 hlid = TX_HW_DEFAULT_AID;
382 ret = wl1271_tx_allocate(wl, skb, extra, buf_offset, hlid);
386 if (wl->bss_type == BSS_TYPE_AP_BSS) {
387 wl1271_tx_ap_update_inconnection_sta(wl, skb);
388 wl1271_tx_regulate_link(wl, hlid);
390 wl1271_tx_update_filters(wl, skb);
393 wl1271_tx_fill_hdr(wl, skb, extra, info, hlid);
396 * The length of each packet is stored in terms of
397 * words. Thus, we must pad the skb data to make sure its
398 * length is aligned. The number of padding bytes is computed
399 * and set in wl1271_tx_fill_hdr.
400 * In special cases, we want to align to a specific block size
401 * (eg. for wl128x with SDIO we align to 256).
403 total_len = wl12xx_calc_packet_alignment(wl, skb->len);
405 memcpy(wl->aggr_buf + buf_offset, skb->data, skb->len);
406 memset(wl->aggr_buf + buf_offset + skb->len, 0, total_len - skb->len);
408 /* Revert side effects in the dummy packet skb, so it can be reused */
409 if (wl12xx_is_dummy_packet(wl, skb))
410 skb_pull(skb, sizeof(struct wl1271_tx_hw_descr));
415 u32 wl1271_tx_enabled_rates_get(struct wl1271 *wl, u32 rate_set)
417 struct ieee80211_supported_band *band;
418 u32 enabled_rates = 0;
421 band = wl->hw->wiphy->bands[wl->band];
422 for (bit = 0; bit < band->n_bitrates; bit++) {
424 enabled_rates |= band->bitrates[bit].hw_value;
428 #ifdef CONFIG_WL12XX_HT
429 /* MCS rates indication are on bits 16 - 23 */
430 rate_set >>= HW_HT_RATES_OFFSET - band->n_bitrates;
432 for (bit = 0; bit < 8; bit++) {
434 enabled_rates |= (CONF_HW_BIT_RATE_MCS_0 << bit);
439 return enabled_rates;
442 void wl1271_handle_tx_low_watermark(struct wl1271 *wl)
446 if (test_bit(WL1271_FLAG_TX_QUEUE_STOPPED, &wl->flags) &&
447 wl->tx_queue_count <= WL1271_TX_QUEUE_LOW_WATERMARK) {
448 /* firmware buffer has space, restart queues */
449 spin_lock_irqsave(&wl->wl_lock, flags);
450 ieee80211_wake_queues(wl->hw);
451 clear_bit(WL1271_FLAG_TX_QUEUE_STOPPED, &wl->flags);
452 spin_unlock_irqrestore(&wl->wl_lock, flags);
456 static struct sk_buff *wl1271_sta_skb_dequeue(struct wl1271 *wl)
458 struct sk_buff *skb = NULL;
461 skb = skb_dequeue(&wl->tx_queue[CONF_TX_AC_VO]);
464 skb = skb_dequeue(&wl->tx_queue[CONF_TX_AC_VI]);
467 skb = skb_dequeue(&wl->tx_queue[CONF_TX_AC_BE]);
470 skb = skb_dequeue(&wl->tx_queue[CONF_TX_AC_BK]);
474 spin_lock_irqsave(&wl->wl_lock, flags);
475 wl->tx_queue_count--;
476 spin_unlock_irqrestore(&wl->wl_lock, flags);
482 static struct sk_buff *wl1271_ap_skb_dequeue(struct wl1271 *wl)
484 struct sk_buff *skb = NULL;
486 int i, h, start_hlid;
488 /* start from the link after the last one */
489 start_hlid = (wl->last_tx_hlid + 1) % AP_MAX_LINKS;
491 /* dequeue according to AC, round robin on each link */
492 for (i = 0; i < AP_MAX_LINKS; i++) {
493 h = (start_hlid + i) % AP_MAX_LINKS;
495 skb = skb_dequeue(&wl->links[h].tx_queue[CONF_TX_AC_VO]);
498 skb = skb_dequeue(&wl->links[h].tx_queue[CONF_TX_AC_VI]);
501 skb = skb_dequeue(&wl->links[h].tx_queue[CONF_TX_AC_BE]);
504 skb = skb_dequeue(&wl->links[h].tx_queue[CONF_TX_AC_BK]);
511 wl->last_tx_hlid = h;
512 spin_lock_irqsave(&wl->wl_lock, flags);
513 wl->tx_queue_count--;
514 spin_unlock_irqrestore(&wl->wl_lock, flags);
516 wl->last_tx_hlid = 0;
522 static struct sk_buff *wl1271_skb_dequeue(struct wl1271 *wl)
525 struct sk_buff *skb = NULL;
527 if (wl->bss_type == BSS_TYPE_AP_BSS)
528 skb = wl1271_ap_skb_dequeue(wl);
530 skb = wl1271_sta_skb_dequeue(wl);
533 test_and_clear_bit(WL1271_FLAG_DUMMY_PACKET_PENDING, &wl->flags)) {
534 skb = wl->dummy_packet;
535 spin_lock_irqsave(&wl->wl_lock, flags);
536 wl->tx_queue_count--;
537 spin_unlock_irqrestore(&wl->wl_lock, flags);
543 static void wl1271_skb_queue_head(struct wl1271 *wl, struct sk_buff *skb)
546 int q = wl1271_tx_get_queue(skb_get_queue_mapping(skb));
548 if (wl12xx_is_dummy_packet(wl, skb)) {
549 set_bit(WL1271_FLAG_DUMMY_PACKET_PENDING, &wl->flags);
550 } else if (wl->bss_type == BSS_TYPE_AP_BSS) {
551 u8 hlid = wl1271_tx_get_hlid(skb);
552 skb_queue_head(&wl->links[hlid].tx_queue[q], skb);
554 /* make sure we dequeue the same packet next time */
555 wl->last_tx_hlid = (hlid + AP_MAX_LINKS - 1) % AP_MAX_LINKS;
557 skb_queue_head(&wl->tx_queue[q], skb);
560 spin_lock_irqsave(&wl->wl_lock, flags);
561 wl->tx_queue_count++;
562 spin_unlock_irqrestore(&wl->wl_lock, flags);
565 static bool wl1271_tx_is_data_present(struct sk_buff *skb)
567 struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)(skb->data);
569 return ieee80211_is_data_present(hdr->frame_control);
572 void wl1271_tx_work_locked(struct wl1271 *wl)
576 bool sent_packets = false;
577 bool had_data = false;
578 bool is_ap = (wl->bss_type == BSS_TYPE_AP_BSS);
581 if (unlikely(wl->state == WL1271_STATE_OFF))
584 while ((skb = wl1271_skb_dequeue(wl))) {
585 if (wl1271_tx_is_data_present(skb))
588 ret = wl1271_prepare_tx_frame(wl, skb, buf_offset);
589 if (ret == -EAGAIN) {
591 * Aggregation buffer is full.
592 * Flush buffer and try again.
594 wl1271_skb_queue_head(wl, skb);
595 wl1271_write(wl, WL1271_SLV_MEM_DATA, wl->aggr_buf,
600 } else if (ret == -EBUSY) {
602 * Firmware buffer is full.
603 * Queue back last skb, and stop aggregating.
605 wl1271_skb_queue_head(wl, skb);
606 /* No work left, avoid scheduling redundant tx work */
607 set_bit(WL1271_FLAG_FW_TX_BUSY, &wl->flags);
609 } else if (ret < 0) {
614 wl->tx_packets_count++;
619 wl1271_write(wl, WL1271_SLV_MEM_DATA, wl->aggr_buf,
625 * Interrupt the firmware with the new packets. This is only
626 * required for older hardware revisions
628 if (wl->quirks & WL12XX_QUIRK_END_OF_TRANSACTION)
629 wl1271_write32(wl, WL1271_HOST_WR_ACCESS,
630 wl->tx_packets_count);
632 wl1271_handle_tx_low_watermark(wl);
634 if (!is_ap && wl->conf.rx_streaming.interval && had_data &&
635 (wl->conf.rx_streaming.always ||
636 test_bit(WL1271_FLAG_SOFT_GEMINI, &wl->flags))) {
637 u32 timeout = wl->conf.rx_streaming.duration;
639 /* enable rx streaming */
640 if (!test_bit(WL1271_FLAG_RX_STREAMING_STARTED, &wl->flags))
641 ieee80211_queue_work(wl->hw,
642 &wl->rx_streaming_enable_work);
644 mod_timer(&wl->rx_streaming_timer,
645 jiffies + msecs_to_jiffies(timeout));
649 void wl1271_tx_work(struct work_struct *work)
651 struct wl1271 *wl = container_of(work, struct wl1271, tx_work);
654 mutex_lock(&wl->mutex);
655 ret = wl1271_ps_elp_wakeup(wl);
659 wl1271_tx_work_locked(wl);
661 wl1271_ps_elp_sleep(wl);
663 mutex_unlock(&wl->mutex);
666 static void wl1271_tx_complete_packet(struct wl1271 *wl,
667 struct wl1271_tx_hw_res_descr *result)
669 struct ieee80211_tx_info *info;
675 /* check for id legality */
676 if (unlikely(id >= ACX_TX_DESCRIPTORS || wl->tx_frames[id] == NULL)) {
677 wl1271_warning("TX result illegal id: %d", id);
681 skb = wl->tx_frames[id];
682 info = IEEE80211_SKB_CB(skb);
684 if (wl12xx_is_dummy_packet(wl, skb)) {
685 wl1271_free_tx_id(wl, id);
689 /* update the TX status info */
690 if (result->status == TX_SUCCESS) {
691 if (!(info->flags & IEEE80211_TX_CTL_NO_ACK))
692 info->flags |= IEEE80211_TX_STAT_ACK;
693 rate = wl1271_rate_to_idx(result->rate_class_index, wl->band);
694 retries = result->ack_failures;
695 } else if (result->status == TX_RETRY_EXCEEDED) {
696 wl->stats.excessive_retries++;
697 retries = result->ack_failures;
700 info->status.rates[0].idx = rate;
701 info->status.rates[0].count = retries;
702 info->status.rates[0].flags = 0;
703 info->status.ack_signal = -1;
705 wl->stats.retry_count += result->ack_failures;
707 /* update security sequence number */
708 wl->tx_security_seq += (result->lsb_security_sequence_number -
709 wl->tx_security_last_seq);
710 wl->tx_security_last_seq = result->lsb_security_sequence_number;
712 /* remove private header from packet */
713 skb_pull(skb, sizeof(struct wl1271_tx_hw_descr));
715 /* remove TKIP header space if present */
716 if (info->control.hw_key &&
717 info->control.hw_key->cipher == WLAN_CIPHER_SUITE_TKIP) {
718 int hdrlen = ieee80211_get_hdrlen_from_skb(skb);
719 memmove(skb->data + WL1271_TKIP_IV_SPACE, skb->data, hdrlen);
720 skb_pull(skb, WL1271_TKIP_IV_SPACE);
723 wl1271_debug(DEBUG_TX, "tx status id %u skb 0x%p failures %u rate 0x%x"
725 result->id, skb, result->ack_failures,
726 result->rate_class_index, result->status);
728 /* return the packet to the stack */
729 skb_queue_tail(&wl->deferred_tx_queue, skb);
730 queue_work(wl->freezable_wq, &wl->netstack_work);
731 wl1271_free_tx_id(wl, result->id);
734 /* Called upon reception of a TX complete interrupt */
735 void wl1271_tx_complete(struct wl1271 *wl)
737 struct wl1271_acx_mem_map *memmap =
738 (struct wl1271_acx_mem_map *)wl->target_mem_map;
739 u32 count, fw_counter;
742 /* read the tx results from the chipset */
743 wl1271_read(wl, le32_to_cpu(memmap->tx_result),
744 wl->tx_res_if, sizeof(*wl->tx_res_if), false);
745 fw_counter = le32_to_cpu(wl->tx_res_if->tx_result_fw_counter);
747 /* write host counter to chipset (to ack) */
748 wl1271_write32(wl, le32_to_cpu(memmap->tx_result) +
749 offsetof(struct wl1271_tx_hw_res_if,
750 tx_result_host_counter), fw_counter);
752 count = fw_counter - wl->tx_results_count;
753 wl1271_debug(DEBUG_TX, "tx_complete received, packets: %d", count);
755 /* verify that the result buffer is not getting overrun */
756 if (unlikely(count > TX_HW_RESULT_QUEUE_LEN))
757 wl1271_warning("TX result overflow from chipset: %d", count);
759 /* process the results */
760 for (i = 0; i < count; i++) {
761 struct wl1271_tx_hw_res_descr *result;
762 u8 offset = wl->tx_results_count & TX_HW_RESULT_QUEUE_LEN_MASK;
764 /* process the packet */
765 result = &(wl->tx_res_if->tx_results_queue[offset]);
766 wl1271_tx_complete_packet(wl, result);
768 wl->tx_results_count++;
772 void wl1271_tx_reset_link_queues(struct wl1271 *wl, u8 hlid)
777 struct ieee80211_tx_info *info;
779 for (i = 0; i < NUM_TX_QUEUES; i++) {
780 while ((skb = skb_dequeue(&wl->links[hlid].tx_queue[i]))) {
781 wl1271_debug(DEBUG_TX, "link freeing skb 0x%p", skb);
782 info = IEEE80211_SKB_CB(skb);
783 info->status.rates[0].idx = -1;
784 info->status.rates[0].count = 0;
785 ieee80211_tx_status_ni(wl->hw, skb);
790 spin_lock_irqsave(&wl->wl_lock, flags);
791 wl->tx_queue_count -= total;
792 spin_unlock_irqrestore(&wl->wl_lock, flags);
794 wl1271_handle_tx_low_watermark(wl);
797 /* caller must hold wl->mutex and TX must be stopped */
798 void wl1271_tx_reset(struct wl1271 *wl, bool reset_tx_queues)
802 struct ieee80211_tx_info *info;
805 if (wl->bss_type == BSS_TYPE_AP_BSS) {
806 for (i = 0; i < AP_MAX_LINKS; i++) {
807 wl1271_tx_reset_link_queues(wl, i);
808 wl->links[i].allocated_blks = 0;
809 wl->links[i].prev_freed_blks = 0;
812 wl->last_tx_hlid = 0;
814 for (i = 0; i < NUM_TX_QUEUES; i++) {
815 while ((skb = skb_dequeue(&wl->tx_queue[i]))) {
816 wl1271_debug(DEBUG_TX, "freeing skb 0x%p",
819 if (!wl12xx_is_dummy_packet(wl, skb)) {
820 info = IEEE80211_SKB_CB(skb);
821 info->status.rates[0].idx = -1;
822 info->status.rates[0].count = 0;
823 ieee80211_tx_status_ni(wl->hw, skb);
829 wl->tx_queue_count = 0;
832 * Make sure the driver is at a consistent state, in case this
833 * function is called from a context other than interface removal.
834 * This call will always wake the TX queues.
837 wl1271_handle_tx_low_watermark(wl);
839 for (i = 0; i < ACX_TX_DESCRIPTORS; i++) {
840 if (wl->tx_frames[i] == NULL)
843 skb = wl->tx_frames[i];
844 wl1271_free_tx_id(wl, i);
845 wl1271_debug(DEBUG_TX, "freeing skb 0x%p", skb);
847 if (!wl12xx_is_dummy_packet(wl, skb)) {
849 * Remove private headers before passing the skb to
852 info = IEEE80211_SKB_CB(skb);
853 skb_pull(skb, sizeof(struct wl1271_tx_hw_descr));
854 if (info->control.hw_key &&
855 info->control.hw_key->cipher ==
856 WLAN_CIPHER_SUITE_TKIP) {
857 int hdrlen = ieee80211_get_hdrlen_from_skb(skb);
858 memmove(skb->data + WL1271_TKIP_IV_SPACE,
860 skb_pull(skb, WL1271_TKIP_IV_SPACE);
863 info->status.rates[0].idx = -1;
864 info->status.rates[0].count = 0;
866 ieee80211_tx_status_ni(wl->hw, skb);
871 #define WL1271_TX_FLUSH_TIMEOUT 500000
873 /* caller must *NOT* hold wl->mutex */
874 void wl1271_tx_flush(struct wl1271 *wl)
876 unsigned long timeout;
877 timeout = jiffies + usecs_to_jiffies(WL1271_TX_FLUSH_TIMEOUT);
879 while (!time_after(jiffies, timeout)) {
880 mutex_lock(&wl->mutex);
881 wl1271_debug(DEBUG_TX, "flushing tx buffer: %d %d",
882 wl->tx_frames_cnt, wl->tx_queue_count);
883 if ((wl->tx_frames_cnt == 0) && (wl->tx_queue_count == 0)) {
884 mutex_unlock(&wl->mutex);
887 mutex_unlock(&wl->mutex);
891 wl1271_warning("Unable to flush all TX buffers, timed out.");
894 u32 wl1271_tx_min_rate_get(struct wl1271 *wl)
899 if (!wl->basic_rate_set) {
901 wl->basic_rate_set = wl->conf.tx.basic_rate;
904 for (i = 0; !rate; i++) {
905 if ((wl->basic_rate_set >> i) & 0x1)