2 * Copyright (c) 2002-2005 Sam Leffler, Errno Consulting
3 * Copyright (c) 2004-2005 Atheros Communications, Inc.
4 * Copyright (c) 2006 Devicescape Software, Inc.
5 * Copyright (c) 2007 Jiri Slaby <jirislaby@gmail.com>
6 * Copyright (c) 2007 Luis R. Rodriguez <mcgrof@winlab.rutgers.edu>
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer,
15 * without modification.
16 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
17 * similar to the "NO WARRANTY" disclaimer below ("Disclaimer") and any
18 * redistribution must be conditioned upon including a substantially
19 * similar Disclaimer requirement for further binary redistribution.
20 * 3. Neither the names of the above-listed copyright holders nor the names
21 * of any contributors may be used to endorse or promote products derived
22 * from this software without specific prior written permission.
24 * Alternatively, this software may be distributed under the terms of the
25 * GNU General Public License ("GPL") version 2 as published by the Free
26 * Software Foundation.
29 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
30 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
31 * LIMITED TO, THE IMPLIED WARRANTIES OF NONINFRINGEMENT, MERCHANTIBILITY
32 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
33 * THE COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY,
34 * OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
35 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
36 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
37 * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
38 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
39 * THE POSSIBILITY OF SUCH DAMAGES.
43 #include <linux/module.h>
44 #include <linux/delay.h>
45 #include <linux/hardirq.h>
48 #include <linux/netdevice.h>
49 #include <linux/cache.h>
50 #include <linux/ethtool.h>
51 #include <linux/uaccess.h>
52 #include <linux/slab.h>
53 #include <linux/etherdevice.h>
55 #include <net/ieee80211_radiotap.h>
57 #include <asm/unaligned.h>
64 #define CREATE_TRACE_POINTS
67 int ath5k_modparam_nohwcrypt;
68 module_param_named(nohwcrypt, ath5k_modparam_nohwcrypt, bool, S_IRUGO);
69 MODULE_PARM_DESC(nohwcrypt, "Disable hardware encryption.");
71 static int modparam_all_channels;
72 module_param_named(all_channels, modparam_all_channels, bool, S_IRUGO);
73 MODULE_PARM_DESC(all_channels, "Expose all channels the device can use.");
75 static int modparam_fastchanswitch;
76 module_param_named(fastchanswitch, modparam_fastchanswitch, bool, S_IRUGO);
77 MODULE_PARM_DESC(fastchanswitch, "Enable fast channel switching for AR2413/AR5413 radios.");
81 MODULE_AUTHOR("Jiri Slaby");
82 MODULE_AUTHOR("Nick Kossifidis");
83 MODULE_DESCRIPTION("Support for 5xxx series of Atheros 802.11 wireless LAN cards.");
84 MODULE_SUPPORTED_DEVICE("Atheros 5xxx WLAN cards");
85 MODULE_LICENSE("Dual BSD/GPL");
87 static int ath5k_init(struct ieee80211_hw *hw);
88 static int ath5k_reset(struct ath5k_softc *sc, struct ieee80211_channel *chan,
92 static const struct ath5k_srev_name srev_names[] = {
93 #ifdef CONFIG_ATHEROS_AR231X
94 { "5312", AR5K_VERSION_MAC, AR5K_SREV_AR5312_R2 },
95 { "5312", AR5K_VERSION_MAC, AR5K_SREV_AR5312_R7 },
96 { "2313", AR5K_VERSION_MAC, AR5K_SREV_AR2313_R8 },
97 { "2315", AR5K_VERSION_MAC, AR5K_SREV_AR2315_R6 },
98 { "2315", AR5K_VERSION_MAC, AR5K_SREV_AR2315_R7 },
99 { "2317", AR5K_VERSION_MAC, AR5K_SREV_AR2317_R1 },
100 { "2317", AR5K_VERSION_MAC, AR5K_SREV_AR2317_R2 },
102 { "5210", AR5K_VERSION_MAC, AR5K_SREV_AR5210 },
103 { "5311", AR5K_VERSION_MAC, AR5K_SREV_AR5311 },
104 { "5311A", AR5K_VERSION_MAC, AR5K_SREV_AR5311A },
105 { "5311B", AR5K_VERSION_MAC, AR5K_SREV_AR5311B },
106 { "5211", AR5K_VERSION_MAC, AR5K_SREV_AR5211 },
107 { "5212", AR5K_VERSION_MAC, AR5K_SREV_AR5212 },
108 { "5213", AR5K_VERSION_MAC, AR5K_SREV_AR5213 },
109 { "5213A", AR5K_VERSION_MAC, AR5K_SREV_AR5213A },
110 { "2413", AR5K_VERSION_MAC, AR5K_SREV_AR2413 },
111 { "2414", AR5K_VERSION_MAC, AR5K_SREV_AR2414 },
112 { "5424", AR5K_VERSION_MAC, AR5K_SREV_AR5424 },
113 { "5413", AR5K_VERSION_MAC, AR5K_SREV_AR5413 },
114 { "5414", AR5K_VERSION_MAC, AR5K_SREV_AR5414 },
115 { "2415", AR5K_VERSION_MAC, AR5K_SREV_AR2415 },
116 { "5416", AR5K_VERSION_MAC, AR5K_SREV_AR5416 },
117 { "5418", AR5K_VERSION_MAC, AR5K_SREV_AR5418 },
118 { "2425", AR5K_VERSION_MAC, AR5K_SREV_AR2425 },
119 { "2417", AR5K_VERSION_MAC, AR5K_SREV_AR2417 },
121 { "xxxxx", AR5K_VERSION_MAC, AR5K_SREV_UNKNOWN },
122 { "5110", AR5K_VERSION_RAD, AR5K_SREV_RAD_5110 },
123 { "5111", AR5K_VERSION_RAD, AR5K_SREV_RAD_5111 },
124 { "5111A", AR5K_VERSION_RAD, AR5K_SREV_RAD_5111A },
125 { "2111", AR5K_VERSION_RAD, AR5K_SREV_RAD_2111 },
126 { "5112", AR5K_VERSION_RAD, AR5K_SREV_RAD_5112 },
127 { "5112A", AR5K_VERSION_RAD, AR5K_SREV_RAD_5112A },
128 { "5112B", AR5K_VERSION_RAD, AR5K_SREV_RAD_5112B },
129 { "2112", AR5K_VERSION_RAD, AR5K_SREV_RAD_2112 },
130 { "2112A", AR5K_VERSION_RAD, AR5K_SREV_RAD_2112A },
131 { "2112B", AR5K_VERSION_RAD, AR5K_SREV_RAD_2112B },
132 { "2413", AR5K_VERSION_RAD, AR5K_SREV_RAD_2413 },
133 { "5413", AR5K_VERSION_RAD, AR5K_SREV_RAD_5413 },
134 { "5424", AR5K_VERSION_RAD, AR5K_SREV_RAD_5424 },
135 { "5133", AR5K_VERSION_RAD, AR5K_SREV_RAD_5133 },
136 #ifdef CONFIG_ATHEROS_AR231X
137 { "2316", AR5K_VERSION_RAD, AR5K_SREV_RAD_2316 },
138 { "2317", AR5K_VERSION_RAD, AR5K_SREV_RAD_2317 },
140 { "xxxxx", AR5K_VERSION_RAD, AR5K_SREV_UNKNOWN },
143 static const struct ieee80211_rate ath5k_rates[] = {
145 .hw_value = ATH5K_RATE_CODE_1M, },
147 .hw_value = ATH5K_RATE_CODE_2M,
148 .hw_value_short = ATH5K_RATE_CODE_2M | AR5K_SET_SHORT_PREAMBLE,
149 .flags = IEEE80211_RATE_SHORT_PREAMBLE },
151 .hw_value = ATH5K_RATE_CODE_5_5M,
152 .hw_value_short = ATH5K_RATE_CODE_5_5M | AR5K_SET_SHORT_PREAMBLE,
153 .flags = IEEE80211_RATE_SHORT_PREAMBLE },
155 .hw_value = ATH5K_RATE_CODE_11M,
156 .hw_value_short = ATH5K_RATE_CODE_11M | AR5K_SET_SHORT_PREAMBLE,
157 .flags = IEEE80211_RATE_SHORT_PREAMBLE },
159 .hw_value = ATH5K_RATE_CODE_6M,
162 .hw_value = ATH5K_RATE_CODE_9M,
165 .hw_value = ATH5K_RATE_CODE_12M,
168 .hw_value = ATH5K_RATE_CODE_18M,
171 .hw_value = ATH5K_RATE_CODE_24M,
174 .hw_value = ATH5K_RATE_CODE_36M,
177 .hw_value = ATH5K_RATE_CODE_48M,
180 .hw_value = ATH5K_RATE_CODE_54M,
185 static inline u64 ath5k_extend_tsf(struct ath5k_hw *ah, u32 rstamp)
187 u64 tsf = ath5k_hw_get_tsf64(ah);
189 if ((tsf & 0x7fff) < rstamp)
192 return (tsf & ~0x7fff) | rstamp;
196 ath5k_chip_name(enum ath5k_srev_type type, u_int16_t val)
198 const char *name = "xxxxx";
201 for (i = 0; i < ARRAY_SIZE(srev_names); i++) {
202 if (srev_names[i].sr_type != type)
205 if ((val & 0xf0) == srev_names[i].sr_val)
206 name = srev_names[i].sr_name;
208 if ((val & 0xff) == srev_names[i].sr_val) {
209 name = srev_names[i].sr_name;
216 static unsigned int ath5k_ioread32(void *hw_priv, u32 reg_offset)
218 struct ath5k_hw *ah = (struct ath5k_hw *) hw_priv;
219 return ath5k_hw_reg_read(ah, reg_offset);
222 static void ath5k_iowrite32(void *hw_priv, u32 val, u32 reg_offset)
224 struct ath5k_hw *ah = (struct ath5k_hw *) hw_priv;
225 ath5k_hw_reg_write(ah, val, reg_offset);
228 static const struct ath_ops ath5k_common_ops = {
229 .read = ath5k_ioread32,
230 .write = ath5k_iowrite32,
233 /***********************\
234 * Driver Initialization *
235 \***********************/
237 static int ath5k_reg_notifier(struct wiphy *wiphy, struct regulatory_request *request)
239 struct ieee80211_hw *hw = wiphy_to_ieee80211_hw(wiphy);
240 struct ath5k_softc *sc = hw->priv;
241 struct ath_regulatory *regulatory = ath5k_hw_regulatory(sc->ah);
243 return ath_reg_notifier_apply(wiphy, request, regulatory);
246 /********************\
247 * Channel/mode setup *
248 \********************/
251 * Returns true for the channel numbers used without all_channels modparam.
253 static bool ath5k_is_standard_channel(short chan, enum ieee80211_band band)
255 if (band == IEEE80211_BAND_2GHZ && chan <= 14)
258 return /* UNII 1,2 */
259 (((chan & 3) == 0 && chan >= 36 && chan <= 64) ||
261 ((chan & 3) == 0 && chan >= 100 && chan <= 140) ||
263 ((chan & 3) == 1 && chan >= 149 && chan <= 165) ||
264 /* 802.11j 5.030-5.080 GHz (20MHz) */
265 (chan == 8 || chan == 12 || chan == 16) ||
266 /* 802.11j 4.9GHz (20MHz) */
267 (chan == 184 || chan == 188 || chan == 192 || chan == 196));
271 ath5k_setup_channels(struct ath5k_hw *ah, struct ieee80211_channel *channels,
272 unsigned int mode, unsigned int max)
274 unsigned int count, size, chfreq, freq, ch;
275 enum ieee80211_band band;
279 /* 1..220, but 2GHz frequencies are filtered by check_channel */
281 chfreq = CHANNEL_5GHZ;
282 band = IEEE80211_BAND_5GHZ;
287 chfreq = CHANNEL_2GHZ;
288 band = IEEE80211_BAND_2GHZ;
291 ATH5K_WARN(ah->ah_sc, "bad mode, not copying channels\n");
296 for (ch = 1; ch <= size && count < max; ch++) {
297 freq = ieee80211_channel_to_frequency(ch, band);
299 if (freq == 0) /* mapping failed - not a standard channel */
302 /* Check if channel is supported by the chipset */
303 if (!ath5k_channel_ok(ah, freq, chfreq))
306 if (!modparam_all_channels &&
307 !ath5k_is_standard_channel(ch, band))
310 /* Write channel info and increment counter */
311 channels[count].center_freq = freq;
312 channels[count].band = band;
316 channels[count].hw_value = chfreq | CHANNEL_OFDM;
319 channels[count].hw_value = CHANNEL_B;
329 ath5k_setup_rate_idx(struct ath5k_softc *sc, struct ieee80211_supported_band *b)
333 for (i = 0; i < AR5K_MAX_RATES; i++)
334 sc->rate_idx[b->band][i] = -1;
336 for (i = 0; i < b->n_bitrates; i++) {
337 sc->rate_idx[b->band][b->bitrates[i].hw_value] = i;
338 if (b->bitrates[i].hw_value_short)
339 sc->rate_idx[b->band][b->bitrates[i].hw_value_short] = i;
344 ath5k_setup_bands(struct ieee80211_hw *hw)
346 struct ath5k_softc *sc = hw->priv;
347 struct ath5k_hw *ah = sc->ah;
348 struct ieee80211_supported_band *sband;
349 int max_c, count_c = 0;
352 BUILD_BUG_ON(ARRAY_SIZE(sc->sbands) < IEEE80211_NUM_BANDS);
353 max_c = ARRAY_SIZE(sc->channels);
356 sband = &sc->sbands[IEEE80211_BAND_2GHZ];
357 sband->band = IEEE80211_BAND_2GHZ;
358 sband->bitrates = &sc->rates[IEEE80211_BAND_2GHZ][0];
360 if (test_bit(AR5K_MODE_11G, sc->ah->ah_capabilities.cap_mode)) {
362 memcpy(sband->bitrates, &ath5k_rates[0],
363 sizeof(struct ieee80211_rate) * 12);
364 sband->n_bitrates = 12;
366 sband->channels = sc->channels;
367 sband->n_channels = ath5k_setup_channels(ah, sband->channels,
368 AR5K_MODE_11G, max_c);
370 hw->wiphy->bands[IEEE80211_BAND_2GHZ] = sband;
371 count_c = sband->n_channels;
373 } else if (test_bit(AR5K_MODE_11B, sc->ah->ah_capabilities.cap_mode)) {
375 memcpy(sband->bitrates, &ath5k_rates[0],
376 sizeof(struct ieee80211_rate) * 4);
377 sband->n_bitrates = 4;
379 /* 5211 only supports B rates and uses 4bit rate codes
380 * (e.g normally we have 0x1B for 1M, but on 5211 we have 0x0B)
383 if (ah->ah_version == AR5K_AR5211) {
384 for (i = 0; i < 4; i++) {
385 sband->bitrates[i].hw_value =
386 sband->bitrates[i].hw_value & 0xF;
387 sband->bitrates[i].hw_value_short =
388 sband->bitrates[i].hw_value_short & 0xF;
392 sband->channels = sc->channels;
393 sband->n_channels = ath5k_setup_channels(ah, sband->channels,
394 AR5K_MODE_11B, max_c);
396 hw->wiphy->bands[IEEE80211_BAND_2GHZ] = sband;
397 count_c = sband->n_channels;
400 ath5k_setup_rate_idx(sc, sband);
402 /* 5GHz band, A mode */
403 if (test_bit(AR5K_MODE_11A, sc->ah->ah_capabilities.cap_mode)) {
404 sband = &sc->sbands[IEEE80211_BAND_5GHZ];
405 sband->band = IEEE80211_BAND_5GHZ;
406 sband->bitrates = &sc->rates[IEEE80211_BAND_5GHZ][0];
408 memcpy(sband->bitrates, &ath5k_rates[4],
409 sizeof(struct ieee80211_rate) * 8);
410 sband->n_bitrates = 8;
412 sband->channels = &sc->channels[count_c];
413 sband->n_channels = ath5k_setup_channels(ah, sband->channels,
414 AR5K_MODE_11A, max_c);
416 hw->wiphy->bands[IEEE80211_BAND_5GHZ] = sband;
418 ath5k_setup_rate_idx(sc, sband);
420 ath5k_debug_dump_bands(sc);
426 * Set/change channels. We always reset the chip.
427 * To accomplish this we must first cleanup any pending DMA,
428 * then restart stuff after a la ath5k_init.
430 * Called with sc->lock.
433 ath5k_chan_set(struct ath5k_softc *sc, struct ieee80211_channel *chan)
435 ATH5K_DBG(sc, ATH5K_DEBUG_RESET,
436 "channel set, resetting (%u -> %u MHz)\n",
437 sc->curchan->center_freq, chan->center_freq);
440 * To switch channels clear any pending DMA operations;
441 * wait long enough for the RX fifo to drain, reset the
442 * hardware at the new frequency, and then re-enable
443 * the relevant bits of the h/w.
445 return ath5k_reset(sc, chan, true);
448 void ath5k_vif_iter(void *data, u8 *mac, struct ieee80211_vif *vif)
450 struct ath5k_vif_iter_data *iter_data = data;
452 struct ath5k_vif *avf = (void *)vif->drv_priv;
454 if (iter_data->hw_macaddr)
455 for (i = 0; i < ETH_ALEN; i++)
456 iter_data->mask[i] &=
457 ~(iter_data->hw_macaddr[i] ^ mac[i]);
459 if (!iter_data->found_active) {
460 iter_data->found_active = true;
461 memcpy(iter_data->active_mac, mac, ETH_ALEN);
464 if (iter_data->need_set_hw_addr && iter_data->hw_macaddr)
465 if (compare_ether_addr(iter_data->hw_macaddr, mac) == 0)
466 iter_data->need_set_hw_addr = false;
468 if (!iter_data->any_assoc) {
470 iter_data->any_assoc = true;
473 /* Calculate combined mode - when APs are active, operate in AP mode.
474 * Otherwise use the mode of the new interface. This can currently
475 * only deal with combinations of APs and STAs. Only one ad-hoc
476 * interfaces is allowed.
478 if (avf->opmode == NL80211_IFTYPE_AP)
479 iter_data->opmode = NL80211_IFTYPE_AP;
481 if (avf->opmode == NL80211_IFTYPE_STATION)
483 if (iter_data->opmode == NL80211_IFTYPE_UNSPECIFIED)
484 iter_data->opmode = avf->opmode;
489 ath5k_update_bssid_mask_and_opmode(struct ath5k_softc *sc,
490 struct ieee80211_vif *vif)
492 struct ath_common *common = ath5k_hw_common(sc->ah);
493 struct ath5k_vif_iter_data iter_data;
497 * Use the hardware MAC address as reference, the hardware uses it
498 * together with the BSSID mask when matching addresses.
500 iter_data.hw_macaddr = common->macaddr;
501 memset(&iter_data.mask, 0xff, ETH_ALEN);
502 iter_data.found_active = false;
503 iter_data.need_set_hw_addr = true;
504 iter_data.opmode = NL80211_IFTYPE_UNSPECIFIED;
505 iter_data.n_stas = 0;
508 ath5k_vif_iter(&iter_data, vif->addr, vif);
510 /* Get list of all active MAC addresses */
511 ieee80211_iterate_active_interfaces_atomic(sc->hw, ath5k_vif_iter,
513 memcpy(sc->bssidmask, iter_data.mask, ETH_ALEN);
515 sc->opmode = iter_data.opmode;
516 if (sc->opmode == NL80211_IFTYPE_UNSPECIFIED)
517 /* Nothing active, default to station mode */
518 sc->opmode = NL80211_IFTYPE_STATION;
520 ath5k_hw_set_opmode(sc->ah, sc->opmode);
521 ATH5K_DBG(sc, ATH5K_DEBUG_MODE, "mode setup opmode %d (%s)\n",
522 sc->opmode, ath_opmode_to_string(sc->opmode));
524 if (iter_data.need_set_hw_addr && iter_data.found_active)
525 ath5k_hw_set_lladdr(sc->ah, iter_data.active_mac);
527 if (ath5k_hw_hasbssidmask(sc->ah))
528 ath5k_hw_set_bssid_mask(sc->ah, sc->bssidmask);
530 /* Set up RX Filter */
531 if (iter_data.n_stas > 1) {
532 /* If you have multiple STA interfaces connected to
533 * different APs, ARPs are not received (most of the time?)
534 * Enabling PROMISC appears to fix that probem.
536 sc->filter_flags |= AR5K_RX_FILTER_PROM;
539 rfilt = sc->filter_flags;
540 ath5k_hw_set_rx_filter(sc->ah, rfilt);
541 ATH5K_DBG(sc, ATH5K_DEBUG_MODE, "RX filter 0x%x\n", rfilt);
545 ath5k_hw_to_driver_rix(struct ath5k_softc *sc, int hw_rix)
549 /* return base rate on errors */
550 if (WARN(hw_rix < 0 || hw_rix >= AR5K_MAX_RATES,
551 "hw_rix out of bounds: %x\n", hw_rix))
554 rix = sc->rate_idx[sc->curchan->band][hw_rix];
555 if (WARN(rix < 0, "invalid hw_rix: %x\n", hw_rix))
566 struct sk_buff *ath5k_rx_skb_alloc(struct ath5k_softc *sc, dma_addr_t *skb_addr)
568 struct ath_common *common = ath5k_hw_common(sc->ah);
572 * Allocate buffer with headroom_needed space for the
573 * fake physical layer header at the start.
575 skb = ath_rxbuf_alloc(common,
580 ATH5K_ERR(sc, "can't alloc skbuff of size %u\n",
585 *skb_addr = dma_map_single(sc->dev,
586 skb->data, common->rx_bufsize,
589 if (unlikely(dma_mapping_error(sc->dev, *skb_addr))) {
590 ATH5K_ERR(sc, "%s: DMA mapping failed\n", __func__);
598 ath5k_rxbuf_setup(struct ath5k_softc *sc, struct ath5k_buf *bf)
600 struct ath5k_hw *ah = sc->ah;
601 struct sk_buff *skb = bf->skb;
602 struct ath5k_desc *ds;
606 skb = ath5k_rx_skb_alloc(sc, &bf->skbaddr);
613 * Setup descriptors. For receive we always terminate
614 * the descriptor list with a self-linked entry so we'll
615 * not get overrun under high load (as can happen with a
616 * 5212 when ANI processing enables PHY error frames).
618 * To ensure the last descriptor is self-linked we create
619 * each descriptor as self-linked and add it to the end. As
620 * each additional descriptor is added the previous self-linked
621 * entry is "fixed" naturally. This should be safe even
622 * if DMA is happening. When processing RX interrupts we
623 * never remove/process the last, self-linked, entry on the
624 * descriptor list. This ensures the hardware always has
625 * someplace to write a new frame.
628 ds->ds_link = bf->daddr; /* link to self */
629 ds->ds_data = bf->skbaddr;
630 ret = ath5k_hw_setup_rx_desc(ah, ds, ah->common.rx_bufsize, 0);
632 ATH5K_ERR(sc, "%s: could not setup RX desc\n", __func__);
636 if (sc->rxlink != NULL)
637 *sc->rxlink = bf->daddr;
638 sc->rxlink = &ds->ds_link;
642 static enum ath5k_pkt_type get_hw_packet_type(struct sk_buff *skb)
644 struct ieee80211_hdr *hdr;
645 enum ath5k_pkt_type htype;
648 hdr = (struct ieee80211_hdr *)skb->data;
649 fc = hdr->frame_control;
651 if (ieee80211_is_beacon(fc))
652 htype = AR5K_PKT_TYPE_BEACON;
653 else if (ieee80211_is_probe_resp(fc))
654 htype = AR5K_PKT_TYPE_PROBE_RESP;
655 else if (ieee80211_is_atim(fc))
656 htype = AR5K_PKT_TYPE_ATIM;
657 else if (ieee80211_is_pspoll(fc))
658 htype = AR5K_PKT_TYPE_PSPOLL;
660 htype = AR5K_PKT_TYPE_NORMAL;
666 ath5k_txbuf_setup(struct ath5k_softc *sc, struct ath5k_buf *bf,
667 struct ath5k_txq *txq, int padsize)
669 struct ath5k_hw *ah = sc->ah;
670 struct ath5k_desc *ds = bf->desc;
671 struct sk_buff *skb = bf->skb;
672 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
673 unsigned int pktlen, flags, keyidx = AR5K_TXKEYIX_INVALID;
674 struct ieee80211_rate *rate;
675 unsigned int mrr_rate[3], mrr_tries[3];
682 flags = AR5K_TXDESC_INTREQ | AR5K_TXDESC_CLRDMASK;
685 bf->skbaddr = dma_map_single(sc->dev, skb->data, skb->len,
688 rate = ieee80211_get_tx_rate(sc->hw, info);
694 if (info->flags & IEEE80211_TX_CTL_NO_ACK)
695 flags |= AR5K_TXDESC_NOACK;
697 rc_flags = info->control.rates[0].flags;
698 hw_rate = (rc_flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE) ?
699 rate->hw_value_short : rate->hw_value;
703 /* FIXME: If we are in g mode and rate is a CCK rate
704 * subtract ah->ah_txpower.txp_cck_ofdm_pwr_delta
705 * from tx power (value is in dB units already) */
706 if (info->control.hw_key) {
707 keyidx = info->control.hw_key->hw_key_idx;
708 pktlen += info->control.hw_key->icv_len;
710 if (rc_flags & IEEE80211_TX_RC_USE_RTS_CTS) {
711 flags |= AR5K_TXDESC_RTSENA;
712 cts_rate = ieee80211_get_rts_cts_rate(sc->hw, info)->hw_value;
713 duration = le16_to_cpu(ieee80211_rts_duration(sc->hw,
714 info->control.vif, pktlen, info));
716 if (rc_flags & IEEE80211_TX_RC_USE_CTS_PROTECT) {
717 flags |= AR5K_TXDESC_CTSENA;
718 cts_rate = ieee80211_get_rts_cts_rate(sc->hw, info)->hw_value;
719 duration = le16_to_cpu(ieee80211_ctstoself_duration(sc->hw,
720 info->control.vif, pktlen, info));
722 ret = ah->ah_setup_tx_desc(ah, ds, pktlen,
723 ieee80211_get_hdrlen_from_skb(skb), padsize,
724 get_hw_packet_type(skb),
725 (sc->power_level * 2),
727 info->control.rates[0].count, keyidx, ah->ah_tx_ant, flags,
732 memset(mrr_rate, 0, sizeof(mrr_rate));
733 memset(mrr_tries, 0, sizeof(mrr_tries));
734 for (i = 0; i < 3; i++) {
735 rate = ieee80211_get_alt_retry_rate(sc->hw, info, i);
739 mrr_rate[i] = rate->hw_value;
740 mrr_tries[i] = info->control.rates[i + 1].count;
743 ath5k_hw_setup_mrr_tx_desc(ah, ds,
744 mrr_rate[0], mrr_tries[0],
745 mrr_rate[1], mrr_tries[1],
746 mrr_rate[2], mrr_tries[2]);
749 ds->ds_data = bf->skbaddr;
751 spin_lock_bh(&txq->lock);
752 list_add_tail(&bf->list, &txq->q);
754 if (txq->link == NULL) /* is this first packet? */
755 ath5k_hw_set_txdp(ah, txq->qnum, bf->daddr);
756 else /* no, so only link it */
757 *txq->link = bf->daddr;
759 txq->link = &ds->ds_link;
760 ath5k_hw_start_tx_dma(ah, txq->qnum);
762 spin_unlock_bh(&txq->lock);
766 dma_unmap_single(sc->dev, bf->skbaddr, skb->len, DMA_TO_DEVICE);
770 /*******************\
771 * Descriptors setup *
772 \*******************/
775 ath5k_desc_alloc(struct ath5k_softc *sc)
777 struct ath5k_desc *ds;
778 struct ath5k_buf *bf;
783 /* allocate descriptors */
784 sc->desc_len = sizeof(struct ath5k_desc) *
785 (ATH_TXBUF + ATH_RXBUF + ATH_BCBUF + 1);
787 sc->desc = dma_alloc_coherent(sc->dev, sc->desc_len,
788 &sc->desc_daddr, GFP_KERNEL);
789 if (sc->desc == NULL) {
790 ATH5K_ERR(sc, "can't allocate descriptors\n");
796 ATH5K_DBG(sc, ATH5K_DEBUG_ANY, "DMA map: %p (%zu) -> %llx\n",
797 ds, sc->desc_len, (unsigned long long)sc->desc_daddr);
799 bf = kcalloc(1 + ATH_TXBUF + ATH_RXBUF + ATH_BCBUF,
800 sizeof(struct ath5k_buf), GFP_KERNEL);
802 ATH5K_ERR(sc, "can't allocate bufptr\n");
808 INIT_LIST_HEAD(&sc->rxbuf);
809 for (i = 0; i < ATH_RXBUF; i++, bf++, ds++, da += sizeof(*ds)) {
812 list_add_tail(&bf->list, &sc->rxbuf);
815 INIT_LIST_HEAD(&sc->txbuf);
816 sc->txbuf_len = ATH_TXBUF;
817 for (i = 0; i < ATH_TXBUF; i++, bf++, ds++,
821 list_add_tail(&bf->list, &sc->txbuf);
825 INIT_LIST_HEAD(&sc->bcbuf);
826 for (i = 0; i < ATH_BCBUF; i++, bf++, ds++, da += sizeof(*ds)) {
829 list_add_tail(&bf->list, &sc->bcbuf);
834 dma_free_coherent(sc->dev, sc->desc_len, sc->desc, sc->desc_daddr);
841 ath5k_txbuf_free_skb(struct ath5k_softc *sc, struct ath5k_buf *bf)
846 dma_unmap_single(sc->dev, bf->skbaddr, bf->skb->len,
848 dev_kfree_skb_any(bf->skb);
851 bf->desc->ds_data = 0;
855 ath5k_rxbuf_free_skb(struct ath5k_softc *sc, struct ath5k_buf *bf)
857 struct ath5k_hw *ah = sc->ah;
858 struct ath_common *common = ath5k_hw_common(ah);
863 dma_unmap_single(sc->dev, bf->skbaddr, common->rx_bufsize,
865 dev_kfree_skb_any(bf->skb);
868 bf->desc->ds_data = 0;
872 ath5k_desc_free(struct ath5k_softc *sc)
874 struct ath5k_buf *bf;
876 list_for_each_entry(bf, &sc->txbuf, list)
877 ath5k_txbuf_free_skb(sc, bf);
878 list_for_each_entry(bf, &sc->rxbuf, list)
879 ath5k_rxbuf_free_skb(sc, bf);
880 list_for_each_entry(bf, &sc->bcbuf, list)
881 ath5k_txbuf_free_skb(sc, bf);
883 /* Free memory associated with all descriptors */
884 dma_free_coherent(sc->dev, sc->desc_len, sc->desc, sc->desc_daddr);
897 static struct ath5k_txq *
898 ath5k_txq_setup(struct ath5k_softc *sc,
899 int qtype, int subtype)
901 struct ath5k_hw *ah = sc->ah;
902 struct ath5k_txq *txq;
903 struct ath5k_txq_info qi = {
904 .tqi_subtype = subtype,
905 /* XXX: default values not correct for B and XR channels,
907 .tqi_aifs = AR5K_TUNE_AIFS,
908 .tqi_cw_min = AR5K_TUNE_CWMIN,
909 .tqi_cw_max = AR5K_TUNE_CWMAX
914 * Enable interrupts only for EOL and DESC conditions.
915 * We mark tx descriptors to receive a DESC interrupt
916 * when a tx queue gets deep; otherwise we wait for the
917 * EOL to reap descriptors. Note that this is done to
918 * reduce interrupt load and this only defers reaping
919 * descriptors, never transmitting frames. Aside from
920 * reducing interrupts this also permits more concurrency.
921 * The only potential downside is if the tx queue backs
922 * up in which case the top half of the kernel may backup
923 * due to a lack of tx descriptors.
925 qi.tqi_flags = AR5K_TXQ_FLAG_TXEOLINT_ENABLE |
926 AR5K_TXQ_FLAG_TXDESCINT_ENABLE;
927 qnum = ath5k_hw_setup_tx_queue(ah, qtype, &qi);
930 * NB: don't print a message, this happens
931 * normally on parts with too few tx queues
933 return ERR_PTR(qnum);
935 if (qnum >= ARRAY_SIZE(sc->txqs)) {
936 ATH5K_ERR(sc, "hw qnum %u out of range, max %tu!\n",
937 qnum, ARRAY_SIZE(sc->txqs));
938 ath5k_hw_release_tx_queue(ah, qnum);
939 return ERR_PTR(-EINVAL);
941 txq = &sc->txqs[qnum];
945 INIT_LIST_HEAD(&txq->q);
946 spin_lock_init(&txq->lock);
949 txq->txq_max = ATH5K_TXQ_LEN_MAX;
950 txq->txq_poll_mark = false;
953 return &sc->txqs[qnum];
957 ath5k_beaconq_setup(struct ath5k_hw *ah)
959 struct ath5k_txq_info qi = {
960 /* XXX: default values not correct for B and XR channels,
962 .tqi_aifs = AR5K_TUNE_AIFS,
963 .tqi_cw_min = AR5K_TUNE_CWMIN,
964 .tqi_cw_max = AR5K_TUNE_CWMAX,
965 /* NB: for dynamic turbo, don't enable any other interrupts */
966 .tqi_flags = AR5K_TXQ_FLAG_TXDESCINT_ENABLE
969 return ath5k_hw_setup_tx_queue(ah, AR5K_TX_QUEUE_BEACON, &qi);
973 ath5k_beaconq_config(struct ath5k_softc *sc)
975 struct ath5k_hw *ah = sc->ah;
976 struct ath5k_txq_info qi;
979 ret = ath5k_hw_get_tx_queueprops(ah, sc->bhalq, &qi);
983 if (sc->opmode == NL80211_IFTYPE_AP ||
984 sc->opmode == NL80211_IFTYPE_MESH_POINT) {
986 * Always burst out beacon and CAB traffic
987 * (aifs = cwmin = cwmax = 0)
992 } else if (sc->opmode == NL80211_IFTYPE_ADHOC) {
994 * Adhoc mode; backoff between 0 and (2 * cw_min).
998 qi.tqi_cw_max = 2 * AR5K_TUNE_CWMIN;
1001 ATH5K_DBG(sc, ATH5K_DEBUG_BEACON,
1002 "beacon queueprops tqi_aifs:%d tqi_cw_min:%d tqi_cw_max:%d\n",
1003 qi.tqi_aifs, qi.tqi_cw_min, qi.tqi_cw_max);
1005 ret = ath5k_hw_set_tx_queueprops(ah, sc->bhalq, &qi);
1007 ATH5K_ERR(sc, "%s: unable to update parameters for beacon "
1008 "hardware queue!\n", __func__);
1011 ret = ath5k_hw_reset_tx_queue(ah, sc->bhalq); /* push to h/w */
1015 /* reconfigure cabq with ready time to 80% of beacon_interval */
1016 ret = ath5k_hw_get_tx_queueprops(ah, AR5K_TX_QUEUE_ID_CAB, &qi);
1020 qi.tqi_ready_time = (sc->bintval * 80) / 100;
1021 ret = ath5k_hw_set_tx_queueprops(ah, AR5K_TX_QUEUE_ID_CAB, &qi);
1025 ret = ath5k_hw_reset_tx_queue(ah, AR5K_TX_QUEUE_ID_CAB);
1031 * ath5k_drain_tx_buffs - Empty tx buffers
1033 * @sc The &struct ath5k_softc
1035 * Empty tx buffers from all queues in preparation
1036 * of a reset or during shutdown.
1038 * NB: this assumes output has been stopped and
1039 * we do not need to block ath5k_tx_tasklet
1042 ath5k_drain_tx_buffs(struct ath5k_softc *sc)
1044 struct ath5k_txq *txq;
1045 struct ath5k_buf *bf, *bf0;
1048 for (i = 0; i < ARRAY_SIZE(sc->txqs); i++) {
1049 if (sc->txqs[i].setup) {
1051 spin_lock_bh(&txq->lock);
1052 list_for_each_entry_safe(bf, bf0, &txq->q, list) {
1053 ath5k_debug_printtxbuf(sc, bf);
1055 ath5k_txbuf_free_skb(sc, bf);
1057 spin_lock_bh(&sc->txbuflock);
1058 list_move_tail(&bf->list, &sc->txbuf);
1061 spin_unlock_bh(&sc->txbuflock);
1064 txq->txq_poll_mark = false;
1065 spin_unlock_bh(&txq->lock);
1071 ath5k_txq_release(struct ath5k_softc *sc)
1073 struct ath5k_txq *txq = sc->txqs;
1076 for (i = 0; i < ARRAY_SIZE(sc->txqs); i++, txq++)
1078 ath5k_hw_release_tx_queue(sc->ah, txq->qnum);
1089 * Enable the receive h/w following a reset.
1092 ath5k_rx_start(struct ath5k_softc *sc)
1094 struct ath5k_hw *ah = sc->ah;
1095 struct ath_common *common = ath5k_hw_common(ah);
1096 struct ath5k_buf *bf;
1099 common->rx_bufsize = roundup(IEEE80211_MAX_FRAME_LEN, common->cachelsz);
1101 ATH5K_DBG(sc, ATH5K_DEBUG_RESET, "cachelsz %u rx_bufsize %u\n",
1102 common->cachelsz, common->rx_bufsize);
1104 spin_lock_bh(&sc->rxbuflock);
1106 list_for_each_entry(bf, &sc->rxbuf, list) {
1107 ret = ath5k_rxbuf_setup(sc, bf);
1109 spin_unlock_bh(&sc->rxbuflock);
1113 bf = list_first_entry(&sc->rxbuf, struct ath5k_buf, list);
1114 ath5k_hw_set_rxdp(ah, bf->daddr);
1115 spin_unlock_bh(&sc->rxbuflock);
1117 ath5k_hw_start_rx_dma(ah); /* enable recv descriptors */
1118 ath5k_update_bssid_mask_and_opmode(sc, NULL); /* set filters, etc. */
1119 ath5k_hw_start_rx_pcu(ah); /* re-enable PCU/DMA engine */
1127 * Disable the receive logic on PCU (DRU)
1128 * In preparation for a shutdown.
1130 * Note: Doesn't stop rx DMA, ath5k_hw_dma_stop
1134 ath5k_rx_stop(struct ath5k_softc *sc)
1136 struct ath5k_hw *ah = sc->ah;
1138 ath5k_hw_set_rx_filter(ah, 0); /* clear recv filter */
1139 ath5k_hw_stop_rx_pcu(ah); /* disable PCU */
1141 ath5k_debug_printrxbuffs(sc, ah);
1145 ath5k_rx_decrypted(struct ath5k_softc *sc, struct sk_buff *skb,
1146 struct ath5k_rx_status *rs)
1148 struct ath5k_hw *ah = sc->ah;
1149 struct ath_common *common = ath5k_hw_common(ah);
1150 struct ieee80211_hdr *hdr = (void *)skb->data;
1151 unsigned int keyix, hlen;
1153 if (!(rs->rs_status & AR5K_RXERR_DECRYPT) &&
1154 rs->rs_keyix != AR5K_RXKEYIX_INVALID)
1155 return RX_FLAG_DECRYPTED;
1157 /* Apparently when a default key is used to decrypt the packet
1158 the hw does not set the index used to decrypt. In such cases
1159 get the index from the packet. */
1160 hlen = ieee80211_hdrlen(hdr->frame_control);
1161 if (ieee80211_has_protected(hdr->frame_control) &&
1162 !(rs->rs_status & AR5K_RXERR_DECRYPT) &&
1163 skb->len >= hlen + 4) {
1164 keyix = skb->data[hlen + 3] >> 6;
1166 if (test_bit(keyix, common->keymap))
1167 return RX_FLAG_DECRYPTED;
1175 ath5k_check_ibss_tsf(struct ath5k_softc *sc, struct sk_buff *skb,
1176 struct ieee80211_rx_status *rxs)
1178 struct ath_common *common = ath5k_hw_common(sc->ah);
1181 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)skb->data;
1183 if (ieee80211_is_beacon(mgmt->frame_control) &&
1184 le16_to_cpu(mgmt->u.beacon.capab_info) & WLAN_CAPABILITY_IBSS &&
1185 memcmp(mgmt->bssid, common->curbssid, ETH_ALEN) == 0) {
1187 * Received an IBSS beacon with the same BSSID. Hardware *must*
1188 * have updated the local TSF. We have to work around various
1189 * hardware bugs, though...
1191 tsf = ath5k_hw_get_tsf64(sc->ah);
1192 bc_tstamp = le64_to_cpu(mgmt->u.beacon.timestamp);
1193 hw_tu = TSF_TO_TU(tsf);
1195 ATH5K_DBG_UNLIMIT(sc, ATH5K_DEBUG_BEACON,
1196 "beacon %llx mactime %llx (diff %lld) tsf now %llx\n",
1197 (unsigned long long)bc_tstamp,
1198 (unsigned long long)rxs->mactime,
1199 (unsigned long long)(rxs->mactime - bc_tstamp),
1200 (unsigned long long)tsf);
1203 * Sometimes the HW will give us a wrong tstamp in the rx
1204 * status, causing the timestamp extension to go wrong.
1205 * (This seems to happen especially with beacon frames bigger
1206 * than 78 byte (incl. FCS))
1207 * But we know that the receive timestamp must be later than the
1208 * timestamp of the beacon since HW must have synced to that.
1210 * NOTE: here we assume mactime to be after the frame was
1211 * received, not like mac80211 which defines it at the start.
1213 if (bc_tstamp > rxs->mactime) {
1214 ATH5K_DBG_UNLIMIT(sc, ATH5K_DEBUG_BEACON,
1215 "fixing mactime from %llx to %llx\n",
1216 (unsigned long long)rxs->mactime,
1217 (unsigned long long)tsf);
1222 * Local TSF might have moved higher than our beacon timers,
1223 * in that case we have to update them to continue sending
1224 * beacons. This also takes care of synchronizing beacon sending
1225 * times with other stations.
1227 if (hw_tu >= sc->nexttbtt)
1228 ath5k_beacon_update_timers(sc, bc_tstamp);
1230 /* Check if the beacon timers are still correct, because a TSF
1231 * update might have created a window between them - for a
1232 * longer description see the comment of this function: */
1233 if (!ath5k_hw_check_beacon_timers(sc->ah, sc->bintval)) {
1234 ath5k_beacon_update_timers(sc, bc_tstamp);
1235 ATH5K_DBG_UNLIMIT(sc, ATH5K_DEBUG_BEACON,
1236 "fixed beacon timers after beacon receive\n");
1242 ath5k_update_beacon_rssi(struct ath5k_softc *sc, struct sk_buff *skb, int rssi)
1244 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)skb->data;
1245 struct ath5k_hw *ah = sc->ah;
1246 struct ath_common *common = ath5k_hw_common(ah);
1248 /* only beacons from our BSSID */
1249 if (!ieee80211_is_beacon(mgmt->frame_control) ||
1250 memcmp(mgmt->bssid, common->curbssid, ETH_ALEN) != 0)
1253 ewma_add(&ah->ah_beacon_rssi_avg, rssi);
1255 /* in IBSS mode we should keep RSSI statistics per neighbour */
1256 /* le16_to_cpu(mgmt->u.beacon.capab_info) & WLAN_CAPABILITY_IBSS */
1260 * Compute padding position. skb must contain an IEEE 802.11 frame
1262 static int ath5k_common_padpos(struct sk_buff *skb)
1264 struct ieee80211_hdr * hdr = (struct ieee80211_hdr *)skb->data;
1265 __le16 frame_control = hdr->frame_control;
1268 if (ieee80211_has_a4(frame_control)) {
1271 if (ieee80211_is_data_qos(frame_control)) {
1272 padpos += IEEE80211_QOS_CTL_LEN;
1279 * This function expects an 802.11 frame and returns the number of
1280 * bytes added, or -1 if we don't have enough header room.
1282 static int ath5k_add_padding(struct sk_buff *skb)
1284 int padpos = ath5k_common_padpos(skb);
1285 int padsize = padpos & 3;
1287 if (padsize && skb->len>padpos) {
1289 if (skb_headroom(skb) < padsize)
1292 skb_push(skb, padsize);
1293 memmove(skb->data, skb->data+padsize, padpos);
1301 * The MAC header is padded to have 32-bit boundary if the
1302 * packet payload is non-zero. The general calculation for
1303 * padsize would take into account odd header lengths:
1304 * padsize = 4 - (hdrlen & 3); however, since only
1305 * even-length headers are used, padding can only be 0 or 2
1306 * bytes and we can optimize this a bit. We must not try to
1307 * remove padding from short control frames that do not have a
1310 * This function expects an 802.11 frame and returns the number of
1313 static int ath5k_remove_padding(struct sk_buff *skb)
1315 int padpos = ath5k_common_padpos(skb);
1316 int padsize = padpos & 3;
1318 if (padsize && skb->len>=padpos+padsize) {
1319 memmove(skb->data + padsize, skb->data, padpos);
1320 skb_pull(skb, padsize);
1328 ath5k_receive_frame(struct ath5k_softc *sc, struct sk_buff *skb,
1329 struct ath5k_rx_status *rs)
1331 struct ieee80211_rx_status *rxs;
1333 ath5k_remove_padding(skb);
1335 rxs = IEEE80211_SKB_RXCB(skb);
1338 if (unlikely(rs->rs_status & AR5K_RXERR_MIC))
1339 rxs->flag |= RX_FLAG_MMIC_ERROR;
1342 * always extend the mac timestamp, since this information is
1343 * also needed for proper IBSS merging.
1345 * XXX: it might be too late to do it here, since rs_tstamp is
1346 * 15bit only. that means TSF extension has to be done within
1347 * 32768usec (about 32ms). it might be necessary to move this to
1348 * the interrupt handler, like it is done in madwifi.
1350 * Unfortunately we don't know when the hardware takes the rx
1351 * timestamp (beginning of phy frame, data frame, end of rx?).
1352 * The only thing we know is that it is hardware specific...
1353 * On AR5213 it seems the rx timestamp is at the end of the
1354 * frame, but i'm not sure.
1356 * NOTE: mac80211 defines mactime at the beginning of the first
1357 * data symbol. Since we don't have any time references it's
1358 * impossible to comply to that. This affects IBSS merge only
1359 * right now, so it's not too bad...
1361 rxs->mactime = ath5k_extend_tsf(sc->ah, rs->rs_tstamp);
1362 rxs->flag |= RX_FLAG_MACTIME_MPDU;
1364 rxs->freq = sc->curchan->center_freq;
1365 rxs->band = sc->curchan->band;
1367 rxs->signal = sc->ah->ah_noise_floor + rs->rs_rssi;
1369 rxs->antenna = rs->rs_antenna;
1371 if (rs->rs_antenna > 0 && rs->rs_antenna < 5)
1372 sc->stats.antenna_rx[rs->rs_antenna]++;
1374 sc->stats.antenna_rx[0]++; /* invalid */
1376 rxs->rate_idx = ath5k_hw_to_driver_rix(sc, rs->rs_rate);
1377 rxs->flag |= ath5k_rx_decrypted(sc, skb, rs);
1379 if (rxs->rate_idx >= 0 && rs->rs_rate ==
1380 sc->sbands[sc->curchan->band].bitrates[rxs->rate_idx].hw_value_short)
1381 rxs->flag |= RX_FLAG_SHORTPRE;
1383 trace_ath5k_rx(sc, skb);
1385 ath5k_update_beacon_rssi(sc, skb, rs->rs_rssi);
1387 /* check beacons in IBSS mode */
1388 if (sc->opmode == NL80211_IFTYPE_ADHOC)
1389 ath5k_check_ibss_tsf(sc, skb, rxs);
1391 ieee80211_rx(sc->hw, skb);
1394 /** ath5k_frame_receive_ok() - Do we want to receive this frame or not?
1396 * Check if we want to further process this frame or not. Also update
1397 * statistics. Return true if we want this frame, false if not.
1400 ath5k_receive_frame_ok(struct ath5k_softc *sc, struct ath5k_rx_status *rs)
1402 sc->stats.rx_all_count++;
1403 sc->stats.rx_bytes_count += rs->rs_datalen;
1405 if (unlikely(rs->rs_status)) {
1406 if (rs->rs_status & AR5K_RXERR_CRC)
1407 sc->stats.rxerr_crc++;
1408 if (rs->rs_status & AR5K_RXERR_FIFO)
1409 sc->stats.rxerr_fifo++;
1410 if (rs->rs_status & AR5K_RXERR_PHY) {
1411 sc->stats.rxerr_phy++;
1412 if (rs->rs_phyerr > 0 && rs->rs_phyerr < 32)
1413 sc->stats.rxerr_phy_code[rs->rs_phyerr]++;
1416 if (rs->rs_status & AR5K_RXERR_DECRYPT) {
1418 * Decrypt error. If the error occurred
1419 * because there was no hardware key, then
1420 * let the frame through so the upper layers
1421 * can process it. This is necessary for 5210
1422 * parts which have no way to setup a ``clear''
1425 * XXX do key cache faulting
1427 sc->stats.rxerr_decrypt++;
1428 if (rs->rs_keyix == AR5K_RXKEYIX_INVALID &&
1429 !(rs->rs_status & AR5K_RXERR_CRC))
1432 if (rs->rs_status & AR5K_RXERR_MIC) {
1433 sc->stats.rxerr_mic++;
1437 /* reject any frames with non-crypto errors */
1438 if (rs->rs_status & ~(AR5K_RXERR_DECRYPT))
1442 if (unlikely(rs->rs_more)) {
1443 sc->stats.rxerr_jumbo++;
1450 ath5k_set_current_imask(struct ath5k_softc *sc)
1452 enum ath5k_int imask = sc->imask;
1453 unsigned long flags;
1455 spin_lock_irqsave(&sc->irqlock, flags);
1457 imask &= ~AR5K_INT_RX_ALL;
1459 imask &= ~AR5K_INT_TX_ALL;
1460 ath5k_hw_set_imr(sc->ah, imask);
1461 spin_unlock_irqrestore(&sc->irqlock, flags);
1465 ath5k_tasklet_rx(unsigned long data)
1467 struct ath5k_rx_status rs = {};
1468 struct sk_buff *skb, *next_skb;
1469 dma_addr_t next_skb_addr;
1470 struct ath5k_softc *sc = (void *)data;
1471 struct ath5k_hw *ah = sc->ah;
1472 struct ath_common *common = ath5k_hw_common(ah);
1473 struct ath5k_buf *bf;
1474 struct ath5k_desc *ds;
1477 spin_lock(&sc->rxbuflock);
1478 if (list_empty(&sc->rxbuf)) {
1479 ATH5K_WARN(sc, "empty rx buf pool\n");
1483 bf = list_first_entry(&sc->rxbuf, struct ath5k_buf, list);
1484 BUG_ON(bf->skb == NULL);
1488 /* bail if HW is still using self-linked descriptor */
1489 if (ath5k_hw_get_rxdp(sc->ah) == bf->daddr)
1492 ret = sc->ah->ah_proc_rx_desc(sc->ah, ds, &rs);
1493 if (unlikely(ret == -EINPROGRESS))
1495 else if (unlikely(ret)) {
1496 ATH5K_ERR(sc, "error in processing rx descriptor\n");
1497 sc->stats.rxerr_proc++;
1501 if (ath5k_receive_frame_ok(sc, &rs)) {
1502 next_skb = ath5k_rx_skb_alloc(sc, &next_skb_addr);
1505 * If we can't replace bf->skb with a new skb under
1506 * memory pressure, just skip this packet
1511 dma_unmap_single(sc->dev, bf->skbaddr,
1515 skb_put(skb, rs.rs_datalen);
1517 ath5k_receive_frame(sc, skb, &rs);
1520 bf->skbaddr = next_skb_addr;
1523 list_move_tail(&bf->list, &sc->rxbuf);
1524 } while (ath5k_rxbuf_setup(sc, bf) == 0);
1526 spin_unlock(&sc->rxbuflock);
1527 sc->rx_pending = false;
1528 ath5k_set_current_imask(sc);
1537 ath5k_tx_queue(struct ieee80211_hw *hw, struct sk_buff *skb,
1538 struct ath5k_txq *txq)
1540 struct ath5k_softc *sc = hw->priv;
1541 struct ath5k_buf *bf;
1542 unsigned long flags;
1545 trace_ath5k_tx(sc, skb, txq);
1548 * The hardware expects the header padded to 4 byte boundaries.
1549 * If this is not the case, we add the padding after the header.
1551 padsize = ath5k_add_padding(skb);
1553 ATH5K_ERR(sc, "tx hdrlen not %%4: not enough"
1554 " headroom to pad");
1558 if (txq->txq_len >= txq->txq_max)
1559 ieee80211_stop_queue(hw, txq->qnum);
1561 spin_lock_irqsave(&sc->txbuflock, flags);
1562 if (list_empty(&sc->txbuf)) {
1563 ATH5K_ERR(sc, "no further txbuf available, dropping packet\n");
1564 spin_unlock_irqrestore(&sc->txbuflock, flags);
1565 ieee80211_stop_queues(hw);
1568 bf = list_first_entry(&sc->txbuf, struct ath5k_buf, list);
1569 list_del(&bf->list);
1571 if (list_empty(&sc->txbuf))
1572 ieee80211_stop_queues(hw);
1573 spin_unlock_irqrestore(&sc->txbuflock, flags);
1577 if (ath5k_txbuf_setup(sc, bf, txq, padsize)) {
1579 spin_lock_irqsave(&sc->txbuflock, flags);
1580 list_add_tail(&bf->list, &sc->txbuf);
1582 spin_unlock_irqrestore(&sc->txbuflock, flags);
1588 dev_kfree_skb_any(skb);
1592 ath5k_tx_frame_completed(struct ath5k_softc *sc, struct sk_buff *skb,
1593 struct ath5k_txq *txq, struct ath5k_tx_status *ts)
1595 struct ieee80211_tx_info *info;
1599 sc->stats.tx_all_count++;
1600 sc->stats.tx_bytes_count += skb->len;
1601 info = IEEE80211_SKB_CB(skb);
1603 tries[0] = info->status.rates[0].count;
1604 tries[1] = info->status.rates[1].count;
1605 tries[2] = info->status.rates[2].count;
1607 ieee80211_tx_info_clear_status(info);
1609 for (i = 0; i < ts->ts_final_idx; i++) {
1610 struct ieee80211_tx_rate *r =
1611 &info->status.rates[i];
1613 r->count = tries[i];
1616 info->status.rates[ts->ts_final_idx].count = ts->ts_final_retry;
1617 info->status.rates[ts->ts_final_idx + 1].idx = -1;
1619 if (unlikely(ts->ts_status)) {
1620 sc->stats.ack_fail++;
1621 if (ts->ts_status & AR5K_TXERR_FILT) {
1622 info->flags |= IEEE80211_TX_STAT_TX_FILTERED;
1623 sc->stats.txerr_filt++;
1625 if (ts->ts_status & AR5K_TXERR_XRETRY)
1626 sc->stats.txerr_retry++;
1627 if (ts->ts_status & AR5K_TXERR_FIFO)
1628 sc->stats.txerr_fifo++;
1630 info->flags |= IEEE80211_TX_STAT_ACK;
1631 info->status.ack_signal = ts->ts_rssi;
1633 /* count the successful attempt as well */
1634 info->status.rates[ts->ts_final_idx].count++;
1638 * Remove MAC header padding before giving the frame
1641 ath5k_remove_padding(skb);
1643 if (ts->ts_antenna > 0 && ts->ts_antenna < 5)
1644 sc->stats.antenna_tx[ts->ts_antenna]++;
1646 sc->stats.antenna_tx[0]++; /* invalid */
1648 trace_ath5k_tx_complete(sc, skb, txq, ts);
1649 ieee80211_tx_status(sc->hw, skb);
1653 ath5k_tx_processq(struct ath5k_softc *sc, struct ath5k_txq *txq)
1655 struct ath5k_tx_status ts = {};
1656 struct ath5k_buf *bf, *bf0;
1657 struct ath5k_desc *ds;
1658 struct sk_buff *skb;
1661 spin_lock(&txq->lock);
1662 list_for_each_entry_safe(bf, bf0, &txq->q, list) {
1664 txq->txq_poll_mark = false;
1666 /* skb might already have been processed last time. */
1667 if (bf->skb != NULL) {
1670 ret = sc->ah->ah_proc_tx_desc(sc->ah, ds, &ts);
1671 if (unlikely(ret == -EINPROGRESS))
1673 else if (unlikely(ret)) {
1675 "error %d while processing "
1676 "queue %u\n", ret, txq->qnum);
1683 dma_unmap_single(sc->dev, bf->skbaddr, skb->len,
1685 ath5k_tx_frame_completed(sc, skb, txq, &ts);
1689 * It's possible that the hardware can say the buffer is
1690 * completed when it hasn't yet loaded the ds_link from
1691 * host memory and moved on.
1692 * Always keep the last descriptor to avoid HW races...
1694 if (ath5k_hw_get_txdp(sc->ah, txq->qnum) != bf->daddr) {
1695 spin_lock(&sc->txbuflock);
1696 list_move_tail(&bf->list, &sc->txbuf);
1699 spin_unlock(&sc->txbuflock);
1702 spin_unlock(&txq->lock);
1703 if (txq->txq_len < ATH5K_TXQ_LEN_LOW && txq->qnum < 4)
1704 ieee80211_wake_queue(sc->hw, txq->qnum);
1708 ath5k_tasklet_tx(unsigned long data)
1711 struct ath5k_softc *sc = (void *)data;
1713 for (i=0; i < AR5K_NUM_TX_QUEUES; i++)
1714 if (sc->txqs[i].setup && (sc->ah->ah_txq_isr & BIT(i)))
1715 ath5k_tx_processq(sc, &sc->txqs[i]);
1717 sc->tx_pending = false;
1718 ath5k_set_current_imask(sc);
1727 * Setup the beacon frame for transmit.
1730 ath5k_beacon_setup(struct ath5k_softc *sc, struct ath5k_buf *bf)
1732 struct sk_buff *skb = bf->skb;
1733 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1734 struct ath5k_hw *ah = sc->ah;
1735 struct ath5k_desc *ds;
1739 const int padsize = 0;
1741 bf->skbaddr = dma_map_single(sc->dev, skb->data, skb->len,
1743 ATH5K_DBG(sc, ATH5K_DEBUG_BEACON, "skb %p [data %p len %u] "
1744 "skbaddr %llx\n", skb, skb->data, skb->len,
1745 (unsigned long long)bf->skbaddr);
1747 if (dma_mapping_error(sc->dev, bf->skbaddr)) {
1748 ATH5K_ERR(sc, "beacon DMA mapping failed\n");
1753 antenna = ah->ah_tx_ant;
1755 flags = AR5K_TXDESC_NOACK;
1756 if (sc->opmode == NL80211_IFTYPE_ADHOC && ath5k_hw_hasveol(ah)) {
1757 ds->ds_link = bf->daddr; /* self-linked */
1758 flags |= AR5K_TXDESC_VEOL;
1763 * If we use multiple antennas on AP and use
1764 * the Sectored AP scenario, switch antenna every
1765 * 4 beacons to make sure everybody hears our AP.
1766 * When a client tries to associate, hw will keep
1767 * track of the tx antenna to be used for this client
1768 * automaticaly, based on ACKed packets.
1770 * Note: AP still listens and transmits RTS on the
1771 * default antenna which is supposed to be an omni.
1773 * Note2: On sectored scenarios it's possible to have
1774 * multiple antennas (1 omni -- the default -- and 14
1775 * sectors), so if we choose to actually support this
1776 * mode, we need to allow the user to set how many antennas
1777 * we have and tweak the code below to send beacons
1780 if (ah->ah_ant_mode == AR5K_ANTMODE_SECTOR_AP)
1781 antenna = sc->bsent & 4 ? 2 : 1;
1784 /* FIXME: If we are in g mode and rate is a CCK rate
1785 * subtract ah->ah_txpower.txp_cck_ofdm_pwr_delta
1786 * from tx power (value is in dB units already) */
1787 ds->ds_data = bf->skbaddr;
1788 ret = ah->ah_setup_tx_desc(ah, ds, skb->len,
1789 ieee80211_get_hdrlen_from_skb(skb), padsize,
1790 AR5K_PKT_TYPE_BEACON, (sc->power_level * 2),
1791 ieee80211_get_tx_rate(sc->hw, info)->hw_value,
1792 1, AR5K_TXKEYIX_INVALID,
1793 antenna, flags, 0, 0);
1799 dma_unmap_single(sc->dev, bf->skbaddr, skb->len, DMA_TO_DEVICE);
1804 * Updates the beacon that is sent by ath5k_beacon_send. For adhoc,
1805 * this is called only once at config_bss time, for AP we do it every
1806 * SWBA interrupt so that the TIM will reflect buffered frames.
1808 * Called with the beacon lock.
1811 ath5k_beacon_update(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
1814 struct ath5k_softc *sc = hw->priv;
1815 struct ath5k_vif *avf = (void *)vif->drv_priv;
1816 struct sk_buff *skb;
1818 if (WARN_ON(!vif)) {
1823 skb = ieee80211_beacon_get(hw, vif);
1830 ath5k_txbuf_free_skb(sc, avf->bbuf);
1831 avf->bbuf->skb = skb;
1832 ret = ath5k_beacon_setup(sc, avf->bbuf);
1834 avf->bbuf->skb = NULL;
1840 * Transmit a beacon frame at SWBA. Dynamic updates to the
1841 * frame contents are done as needed and the slot time is
1842 * also adjusted based on current state.
1844 * This is called from software irq context (beacontq tasklets)
1845 * or user context from ath5k_beacon_config.
1848 ath5k_beacon_send(struct ath5k_softc *sc)
1850 struct ath5k_hw *ah = sc->ah;
1851 struct ieee80211_vif *vif;
1852 struct ath5k_vif *avf;
1853 struct ath5k_buf *bf;
1854 struct sk_buff *skb;
1856 ATH5K_DBG_UNLIMIT(sc, ATH5K_DEBUG_BEACON, "in beacon_send\n");
1859 * Check if the previous beacon has gone out. If
1860 * not, don't don't try to post another: skip this
1861 * period and wait for the next. Missed beacons
1862 * indicate a problem and should not occur. If we
1863 * miss too many consecutive beacons reset the device.
1865 if (unlikely(ath5k_hw_num_tx_pending(ah, sc->bhalq) != 0)) {
1867 ATH5K_DBG(sc, ATH5K_DEBUG_BEACON,
1868 "missed %u consecutive beacons\n", sc->bmisscount);
1869 if (sc->bmisscount > 10) { /* NB: 10 is a guess */
1870 ATH5K_DBG(sc, ATH5K_DEBUG_BEACON,
1871 "stuck beacon time (%u missed)\n",
1873 ATH5K_DBG(sc, ATH5K_DEBUG_RESET,
1874 "stuck beacon, resetting\n");
1875 ieee80211_queue_work(sc->hw, &sc->reset_work);
1879 if (unlikely(sc->bmisscount != 0)) {
1880 ATH5K_DBG(sc, ATH5K_DEBUG_BEACON,
1881 "resume beacon xmit after %u misses\n",
1886 if ((sc->opmode == NL80211_IFTYPE_AP && sc->num_ap_vifs > 1) ||
1887 sc->opmode == NL80211_IFTYPE_MESH_POINT) {
1888 u64 tsf = ath5k_hw_get_tsf64(ah);
1889 u32 tsftu = TSF_TO_TU(tsf);
1890 int slot = ((tsftu % sc->bintval) * ATH_BCBUF) / sc->bintval;
1891 vif = sc->bslot[(slot + 1) % ATH_BCBUF];
1892 ATH5K_DBG(sc, ATH5K_DEBUG_BEACON,
1893 "tsf %llx tsftu %x intval %u slot %u vif %p\n",
1894 (unsigned long long)tsf, tsftu, sc->bintval, slot, vif);
1895 } else /* only one interface */
1901 avf = (void *)vif->drv_priv;
1903 if (unlikely(bf->skb == NULL || sc->opmode == NL80211_IFTYPE_STATION ||
1904 sc->opmode == NL80211_IFTYPE_MONITOR)) {
1905 ATH5K_WARN(sc, "bf=%p bf_skb=%p\n", bf, bf ? bf->skb : NULL);
1910 * Stop any current dma and put the new frame on the queue.
1911 * This should never fail since we check above that no frames
1912 * are still pending on the queue.
1914 if (unlikely(ath5k_hw_stop_beacon_queue(ah, sc->bhalq))) {
1915 ATH5K_WARN(sc, "beacon queue %u didn't start/stop ?\n", sc->bhalq);
1916 /* NB: hw still stops DMA, so proceed */
1919 /* refresh the beacon for AP or MESH mode */
1920 if (sc->opmode == NL80211_IFTYPE_AP ||
1921 sc->opmode == NL80211_IFTYPE_MESH_POINT)
1922 ath5k_beacon_update(sc->hw, vif);
1924 trace_ath5k_tx(sc, bf->skb, &sc->txqs[sc->bhalq]);
1926 ath5k_hw_set_txdp(ah, sc->bhalq, bf->daddr);
1927 ath5k_hw_start_tx_dma(ah, sc->bhalq);
1928 ATH5K_DBG(sc, ATH5K_DEBUG_BEACON, "TXDP[%u] = %llx (%p)\n",
1929 sc->bhalq, (unsigned long long)bf->daddr, bf->desc);
1931 skb = ieee80211_get_buffered_bc(sc->hw, vif);
1933 ath5k_tx_queue(sc->hw, skb, sc->cabq);
1934 skb = ieee80211_get_buffered_bc(sc->hw, vif);
1941 * ath5k_beacon_update_timers - update beacon timers
1943 * @sc: struct ath5k_softc pointer we are operating on
1944 * @bc_tsf: the timestamp of the beacon. 0 to reset the TSF. -1 to perform a
1945 * beacon timer update based on the current HW TSF.
1947 * Calculate the next target beacon transmit time (TBTT) based on the timestamp
1948 * of a received beacon or the current local hardware TSF and write it to the
1949 * beacon timer registers.
1951 * This is called in a variety of situations, e.g. when a beacon is received,
1952 * when a TSF update has been detected, but also when an new IBSS is created or
1953 * when we otherwise know we have to update the timers, but we keep it in this
1954 * function to have it all together in one place.
1957 ath5k_beacon_update_timers(struct ath5k_softc *sc, u64 bc_tsf)
1959 struct ath5k_hw *ah = sc->ah;
1960 u32 nexttbtt, intval, hw_tu, bc_tu;
1963 intval = sc->bintval & AR5K_BEACON_PERIOD;
1964 if (sc->opmode == NL80211_IFTYPE_AP && sc->num_ap_vifs > 1) {
1965 intval /= ATH_BCBUF; /* staggered multi-bss beacons */
1967 ATH5K_WARN(sc, "intval %u is too low, min 15\n",
1970 if (WARN_ON(!intval))
1973 /* beacon TSF converted to TU */
1974 bc_tu = TSF_TO_TU(bc_tsf);
1976 /* current TSF converted to TU */
1977 hw_tsf = ath5k_hw_get_tsf64(ah);
1978 hw_tu = TSF_TO_TU(hw_tsf);
1980 #define FUDGE AR5K_TUNE_SW_BEACON_RESP + 3
1981 /* We use FUDGE to make sure the next TBTT is ahead of the current TU.
1982 * Since we later subtract AR5K_TUNE_SW_BEACON_RESP (10) in the timer
1983 * configuration we need to make sure it is bigger than that. */
1987 * no beacons received, called internally.
1988 * just need to refresh timers based on HW TSF.
1990 nexttbtt = roundup(hw_tu + FUDGE, intval);
1991 } else if (bc_tsf == 0) {
1993 * no beacon received, probably called by ath5k_reset_tsf().
1994 * reset TSF to start with 0.
1997 intval |= AR5K_BEACON_RESET_TSF;
1998 } else if (bc_tsf > hw_tsf) {
2000 * beacon received, SW merge happened but HW TSF not yet updated.
2001 * not possible to reconfigure timers yet, but next time we
2002 * receive a beacon with the same BSSID, the hardware will
2003 * automatically update the TSF and then we need to reconfigure
2006 ATH5K_DBG_UNLIMIT(sc, ATH5K_DEBUG_BEACON,
2007 "need to wait for HW TSF sync\n");
2011 * most important case for beacon synchronization between STA.
2013 * beacon received and HW TSF has been already updated by HW.
2014 * update next TBTT based on the TSF of the beacon, but make
2015 * sure it is ahead of our local TSF timer.
2017 nexttbtt = bc_tu + roundup(hw_tu + FUDGE - bc_tu, intval);
2021 sc->nexttbtt = nexttbtt;
2023 intval |= AR5K_BEACON_ENA;
2024 ath5k_hw_init_beacon(ah, nexttbtt, intval);
2027 * debugging output last in order to preserve the time critical aspect
2031 ATH5K_DBG_UNLIMIT(sc, ATH5K_DEBUG_BEACON,
2032 "reconfigured timers based on HW TSF\n");
2033 else if (bc_tsf == 0)
2034 ATH5K_DBG_UNLIMIT(sc, ATH5K_DEBUG_BEACON,
2035 "reset HW TSF and timers\n");
2037 ATH5K_DBG_UNLIMIT(sc, ATH5K_DEBUG_BEACON,
2038 "updated timers based on beacon TSF\n");
2040 ATH5K_DBG_UNLIMIT(sc, ATH5K_DEBUG_BEACON,
2041 "bc_tsf %llx hw_tsf %llx bc_tu %u hw_tu %u nexttbtt %u\n",
2042 (unsigned long long) bc_tsf,
2043 (unsigned long long) hw_tsf, bc_tu, hw_tu, nexttbtt);
2044 ATH5K_DBG_UNLIMIT(sc, ATH5K_DEBUG_BEACON, "intval %u %s %s\n",
2045 intval & AR5K_BEACON_PERIOD,
2046 intval & AR5K_BEACON_ENA ? "AR5K_BEACON_ENA" : "",
2047 intval & AR5K_BEACON_RESET_TSF ? "AR5K_BEACON_RESET_TSF" : "");
2051 * ath5k_beacon_config - Configure the beacon queues and interrupts
2053 * @sc: struct ath5k_softc pointer we are operating on
2055 * In IBSS mode we use a self-linked tx descriptor if possible. We enable SWBA
2056 * interrupts to detect TSF updates only.
2059 ath5k_beacon_config(struct ath5k_softc *sc)
2061 struct ath5k_hw *ah = sc->ah;
2062 unsigned long flags;
2064 spin_lock_irqsave(&sc->block, flags);
2066 sc->imask &= ~(AR5K_INT_BMISS | AR5K_INT_SWBA);
2068 if (sc->enable_beacon) {
2070 * In IBSS mode we use a self-linked tx descriptor and let the
2071 * hardware send the beacons automatically. We have to load it
2073 * We use the SWBA interrupt only to keep track of the beacon
2074 * timers in order to detect automatic TSF updates.
2076 ath5k_beaconq_config(sc);
2078 sc->imask |= AR5K_INT_SWBA;
2080 if (sc->opmode == NL80211_IFTYPE_ADHOC) {
2081 if (ath5k_hw_hasveol(ah))
2082 ath5k_beacon_send(sc);
2084 ath5k_beacon_update_timers(sc, -1);
2086 ath5k_hw_stop_beacon_queue(sc->ah, sc->bhalq);
2089 ath5k_hw_set_imr(ah, sc->imask);
2091 spin_unlock_irqrestore(&sc->block, flags);
2094 static void ath5k_tasklet_beacon(unsigned long data)
2096 struct ath5k_softc *sc = (struct ath5k_softc *) data;
2099 * Software beacon alert--time to send a beacon.
2101 * In IBSS mode we use this interrupt just to
2102 * keep track of the next TBTT (target beacon
2103 * transmission time) in order to detect wether
2104 * automatic TSF updates happened.
2106 if (sc->opmode == NL80211_IFTYPE_ADHOC) {
2107 /* XXX: only if VEOL suppported */
2108 u64 tsf = ath5k_hw_get_tsf64(sc->ah);
2109 sc->nexttbtt += sc->bintval;
2110 ATH5K_DBG(sc, ATH5K_DEBUG_BEACON,
2111 "SWBA nexttbtt: %x hw_tu: %x "
2115 (unsigned long long) tsf);
2117 spin_lock(&sc->block);
2118 ath5k_beacon_send(sc);
2119 spin_unlock(&sc->block);
2124 /********************\
2125 * Interrupt handling *
2126 \********************/
2129 ath5k_intr_calibration_poll(struct ath5k_hw *ah)
2131 if (time_is_before_eq_jiffies(ah->ah_cal_next_ani) &&
2132 !(ah->ah_cal_mask & AR5K_CALIBRATION_FULL)) {
2133 /* run ANI only when full calibration is not active */
2134 ah->ah_cal_next_ani = jiffies +
2135 msecs_to_jiffies(ATH5K_TUNE_CALIBRATION_INTERVAL_ANI);
2136 tasklet_schedule(&ah->ah_sc->ani_tasklet);
2138 } else if (time_is_before_eq_jiffies(ah->ah_cal_next_full)) {
2139 ah->ah_cal_next_full = jiffies +
2140 msecs_to_jiffies(ATH5K_TUNE_CALIBRATION_INTERVAL_FULL);
2141 tasklet_schedule(&ah->ah_sc->calib);
2143 /* we could use SWI to generate enough interrupts to meet our
2144 * calibration interval requirements, if necessary:
2145 * AR5K_REG_ENABLE_BITS(ah, AR5K_CR, AR5K_CR_SWI); */
2149 ath5k_schedule_rx(struct ath5k_softc *sc)
2151 sc->rx_pending = true;
2152 tasklet_schedule(&sc->rxtq);
2156 ath5k_schedule_tx(struct ath5k_softc *sc)
2158 sc->tx_pending = true;
2159 tasklet_schedule(&sc->txtq);
2163 ath5k_intr(int irq, void *dev_id)
2165 struct ath5k_softc *sc = dev_id;
2166 struct ath5k_hw *ah = sc->ah;
2167 enum ath5k_int status;
2168 unsigned int counter = 1000;
2170 if (unlikely(test_bit(ATH_STAT_INVALID, sc->status) ||
2171 ((ath5k_get_bus_type(ah) != ATH_AHB) &&
2172 !ath5k_hw_is_intr_pending(ah))))
2176 ath5k_hw_get_isr(ah, &status); /* NB: clears IRQ too */
2177 ATH5K_DBG(sc, ATH5K_DEBUG_INTR, "status 0x%x/0x%x\n",
2179 if (unlikely(status & AR5K_INT_FATAL)) {
2181 * Fatal errors are unrecoverable.
2182 * Typically these are caused by DMA errors.
2184 ATH5K_DBG(sc, ATH5K_DEBUG_RESET,
2185 "fatal int, resetting\n");
2186 ieee80211_queue_work(sc->hw, &sc->reset_work);
2187 } else if (unlikely(status & AR5K_INT_RXORN)) {
2189 * Receive buffers are full. Either the bus is busy or
2190 * the CPU is not fast enough to process all received
2192 * Older chipsets need a reset to come out of this
2193 * condition, but we treat it as RX for newer chips.
2194 * We don't know exactly which versions need a reset -
2195 * this guess is copied from the HAL.
2197 sc->stats.rxorn_intr++;
2198 if (ah->ah_mac_srev < AR5K_SREV_AR5212) {
2199 ATH5K_DBG(sc, ATH5K_DEBUG_RESET,
2200 "rx overrun, resetting\n");
2201 ieee80211_queue_work(sc->hw, &sc->reset_work);
2204 ath5k_schedule_rx(sc);
2206 if (status & AR5K_INT_SWBA) {
2207 tasklet_hi_schedule(&sc->beacontq);
2209 if (status & AR5K_INT_RXEOL) {
2211 * NB: the hardware should re-read the link when
2212 * RXE bit is written, but it doesn't work at
2213 * least on older hardware revs.
2215 sc->stats.rxeol_intr++;
2217 if (status & AR5K_INT_TXURN) {
2218 /* bump tx trigger level */
2219 ath5k_hw_update_tx_triglevel(ah, true);
2221 if (status & (AR5K_INT_RXOK | AR5K_INT_RXERR))
2222 ath5k_schedule_rx(sc);
2223 if (status & (AR5K_INT_TXOK | AR5K_INT_TXDESC
2224 | AR5K_INT_TXERR | AR5K_INT_TXEOL))
2225 ath5k_schedule_tx(sc);
2226 if (status & AR5K_INT_BMISS) {
2229 if (status & AR5K_INT_MIB) {
2230 sc->stats.mib_intr++;
2231 ath5k_hw_update_mib_counters(ah);
2232 ath5k_ani_mib_intr(ah);
2234 if (status & AR5K_INT_GPIO)
2235 tasklet_schedule(&sc->rf_kill.toggleq);
2239 if (ath5k_get_bus_type(ah) == ATH_AHB)
2242 } while (ath5k_hw_is_intr_pending(ah) && --counter > 0);
2244 if (sc->rx_pending || sc->tx_pending)
2245 ath5k_set_current_imask(sc);
2247 if (unlikely(!counter))
2248 ATH5K_WARN(sc, "too many interrupts, giving up for now\n");
2250 ath5k_intr_calibration_poll(ah);
2256 * Periodically recalibrate the PHY to account
2257 * for temperature/environment changes.
2260 ath5k_tasklet_calibrate(unsigned long data)
2262 struct ath5k_softc *sc = (void *)data;
2263 struct ath5k_hw *ah = sc->ah;
2265 /* Only full calibration for now */
2266 ah->ah_cal_mask |= AR5K_CALIBRATION_FULL;
2268 ATH5K_DBG(sc, ATH5K_DEBUG_CALIBRATE, "channel %u/%x\n",
2269 ieee80211_frequency_to_channel(sc->curchan->center_freq),
2270 sc->curchan->hw_value);
2272 if (ath5k_hw_gainf_calibrate(ah) == AR5K_RFGAIN_NEED_CHANGE) {
2274 * Rfgain is out of bounds, reset the chip
2275 * to load new gain values.
2277 ATH5K_DBG(sc, ATH5K_DEBUG_RESET, "calibration, resetting\n");
2278 ieee80211_queue_work(sc->hw, &sc->reset_work);
2280 if (ath5k_hw_phy_calibrate(ah, sc->curchan))
2281 ATH5K_ERR(sc, "calibration of channel %u failed\n",
2282 ieee80211_frequency_to_channel(
2283 sc->curchan->center_freq));
2285 /* Noise floor calibration interrupts rx/tx path while I/Q calibration
2287 * TODO: We should stop TX here, so that it doesn't interfere.
2288 * Note that stopping the queues is not enough to stop TX! */
2289 if (time_is_before_eq_jiffies(ah->ah_cal_next_nf)) {
2290 ah->ah_cal_next_nf = jiffies +
2291 msecs_to_jiffies(ATH5K_TUNE_CALIBRATION_INTERVAL_NF);
2292 ath5k_hw_update_noise_floor(ah);
2295 ah->ah_cal_mask &= ~AR5K_CALIBRATION_FULL;
2300 ath5k_tasklet_ani(unsigned long data)
2302 struct ath5k_softc *sc = (void *)data;
2303 struct ath5k_hw *ah = sc->ah;
2305 ah->ah_cal_mask |= AR5K_CALIBRATION_ANI;
2306 ath5k_ani_calibration(ah);
2307 ah->ah_cal_mask &= ~AR5K_CALIBRATION_ANI;
2312 ath5k_tx_complete_poll_work(struct work_struct *work)
2314 struct ath5k_softc *sc = container_of(work, struct ath5k_softc,
2315 tx_complete_work.work);
2316 struct ath5k_txq *txq;
2318 bool needreset = false;
2320 mutex_lock(&sc->lock);
2322 for (i = 0; i < ARRAY_SIZE(sc->txqs); i++) {
2323 if (sc->txqs[i].setup) {
2325 spin_lock_bh(&txq->lock);
2326 if (txq->txq_len > 1) {
2327 if (txq->txq_poll_mark) {
2328 ATH5K_DBG(sc, ATH5K_DEBUG_XMIT,
2329 "TX queue stuck %d\n",
2333 spin_unlock_bh(&txq->lock);
2336 txq->txq_poll_mark = true;
2339 spin_unlock_bh(&txq->lock);
2344 ATH5K_DBG(sc, ATH5K_DEBUG_RESET,
2345 "TX queues stuck, resetting\n");
2346 ath5k_reset(sc, NULL, true);
2349 mutex_unlock(&sc->lock);
2351 ieee80211_queue_delayed_work(sc->hw, &sc->tx_complete_work,
2352 msecs_to_jiffies(ATH5K_TX_COMPLETE_POLL_INT));
2356 /*************************\
2357 * Initialization routines *
2358 \*************************/
2361 ath5k_init_softc(struct ath5k_softc *sc, const struct ath_bus_ops *bus_ops)
2363 struct ieee80211_hw *hw = sc->hw;
2364 struct ath_common *common;
2368 /* Initialize driver private data */
2369 SET_IEEE80211_DEV(hw, sc->dev);
2370 hw->flags = IEEE80211_HW_RX_INCLUDES_FCS |
2371 IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING |
2372 IEEE80211_HW_SIGNAL_DBM |
2373 IEEE80211_HW_REPORTS_TX_ACK_STATUS;
2375 hw->wiphy->interface_modes =
2376 BIT(NL80211_IFTYPE_AP) |
2377 BIT(NL80211_IFTYPE_STATION) |
2378 BIT(NL80211_IFTYPE_ADHOC) |
2379 BIT(NL80211_IFTYPE_MESH_POINT);
2381 /* both antennas can be configured as RX or TX */
2382 hw->wiphy->available_antennas_tx = 0x3;
2383 hw->wiphy->available_antennas_rx = 0x3;
2385 hw->extra_tx_headroom = 2;
2386 hw->channel_change_time = 5000;
2389 * Mark the device as detached to avoid processing
2390 * interrupts until setup is complete.
2392 __set_bit(ATH_STAT_INVALID, sc->status);
2394 sc->opmode = NL80211_IFTYPE_STATION;
2396 mutex_init(&sc->lock);
2397 spin_lock_init(&sc->rxbuflock);
2398 spin_lock_init(&sc->txbuflock);
2399 spin_lock_init(&sc->block);
2400 spin_lock_init(&sc->irqlock);
2402 /* Setup interrupt handler */
2403 ret = request_irq(sc->irq, ath5k_intr, IRQF_SHARED, "ath", sc);
2405 ATH5K_ERR(sc, "request_irq failed\n");
2409 /* If we passed the test, malloc an ath5k_hw struct */
2410 sc->ah = kzalloc(sizeof(struct ath5k_hw), GFP_KERNEL);
2413 ATH5K_ERR(sc, "out of memory\n");
2418 sc->ah->ah_iobase = sc->iobase;
2419 common = ath5k_hw_common(sc->ah);
2420 common->ops = &ath5k_common_ops;
2421 common->bus_ops = bus_ops;
2422 common->ah = sc->ah;
2427 * Cache line size is used to size and align various
2428 * structures used to communicate with the hardware.
2430 ath5k_read_cachesize(common, &csz);
2431 common->cachelsz = csz << 2; /* convert to bytes */
2433 spin_lock_init(&common->cc_lock);
2435 /* Initialize device */
2436 ret = ath5k_hw_init(sc);
2440 /* set up multi-rate retry capabilities */
2441 if (sc->ah->ah_version == AR5K_AR5212) {
2443 hw->max_rate_tries = max(AR5K_INIT_RETRY_SHORT,
2444 AR5K_INIT_RETRY_LONG);
2447 hw->vif_data_size = sizeof(struct ath5k_vif);
2449 /* Finish private driver data initialization */
2450 ret = ath5k_init(hw);
2454 ATH5K_INFO(sc, "Atheros AR%s chip found (MAC: 0x%x, PHY: 0x%x)\n",
2455 ath5k_chip_name(AR5K_VERSION_MAC, sc->ah->ah_mac_srev),
2456 sc->ah->ah_mac_srev,
2457 sc->ah->ah_phy_revision);
2459 if (!sc->ah->ah_single_chip) {
2460 /* Single chip radio (!RF5111) */
2461 if (sc->ah->ah_radio_5ghz_revision &&
2462 !sc->ah->ah_radio_2ghz_revision) {
2463 /* No 5GHz support -> report 2GHz radio */
2464 if (!test_bit(AR5K_MODE_11A,
2465 sc->ah->ah_capabilities.cap_mode)) {
2466 ATH5K_INFO(sc, "RF%s 2GHz radio found (0x%x)\n",
2467 ath5k_chip_name(AR5K_VERSION_RAD,
2468 sc->ah->ah_radio_5ghz_revision),
2469 sc->ah->ah_radio_5ghz_revision);
2470 /* No 2GHz support (5110 and some
2471 * 5Ghz only cards) -> report 5Ghz radio */
2472 } else if (!test_bit(AR5K_MODE_11B,
2473 sc->ah->ah_capabilities.cap_mode)) {
2474 ATH5K_INFO(sc, "RF%s 5GHz radio found (0x%x)\n",
2475 ath5k_chip_name(AR5K_VERSION_RAD,
2476 sc->ah->ah_radio_5ghz_revision),
2477 sc->ah->ah_radio_5ghz_revision);
2478 /* Multiband radio */
2480 ATH5K_INFO(sc, "RF%s multiband radio found"
2482 ath5k_chip_name(AR5K_VERSION_RAD,
2483 sc->ah->ah_radio_5ghz_revision),
2484 sc->ah->ah_radio_5ghz_revision);
2487 /* Multi chip radio (RF5111 - RF2111) ->
2488 * report both 2GHz/5GHz radios */
2489 else if (sc->ah->ah_radio_5ghz_revision &&
2490 sc->ah->ah_radio_2ghz_revision){
2491 ATH5K_INFO(sc, "RF%s 5GHz radio found (0x%x)\n",
2492 ath5k_chip_name(AR5K_VERSION_RAD,
2493 sc->ah->ah_radio_5ghz_revision),
2494 sc->ah->ah_radio_5ghz_revision);
2495 ATH5K_INFO(sc, "RF%s 2GHz radio found (0x%x)\n",
2496 ath5k_chip_name(AR5K_VERSION_RAD,
2497 sc->ah->ah_radio_2ghz_revision),
2498 sc->ah->ah_radio_2ghz_revision);
2502 ath5k_debug_init_device(sc);
2504 /* ready to process interrupts */
2505 __clear_bit(ATH_STAT_INVALID, sc->status);
2509 ath5k_hw_deinit(sc->ah);
2513 free_irq(sc->irq, sc);
2519 ath5k_stop_locked(struct ath5k_softc *sc)
2521 struct ath5k_hw *ah = sc->ah;
2523 ATH5K_DBG(sc, ATH5K_DEBUG_RESET, "invalid %u\n",
2524 test_bit(ATH_STAT_INVALID, sc->status));
2527 * Shutdown the hardware and driver:
2528 * stop output from above
2529 * disable interrupts
2531 * turn off the radio
2532 * clear transmit machinery
2533 * clear receive machinery
2534 * drain and release tx queues
2535 * reclaim beacon resources
2536 * power down hardware
2538 * Note that some of this work is not possible if the
2539 * hardware is gone (invalid).
2541 ieee80211_stop_queues(sc->hw);
2543 if (!test_bit(ATH_STAT_INVALID, sc->status)) {
2545 ath5k_hw_set_imr(ah, 0);
2546 synchronize_irq(sc->irq);
2548 ath5k_hw_dma_stop(ah);
2549 ath5k_drain_tx_buffs(sc);
2550 ath5k_hw_phy_disable(ah);
2557 ath5k_init_hw(struct ath5k_softc *sc)
2559 struct ath5k_hw *ah = sc->ah;
2560 struct ath_common *common = ath5k_hw_common(ah);
2563 mutex_lock(&sc->lock);
2565 ATH5K_DBG(sc, ATH5K_DEBUG_RESET, "mode %d\n", sc->opmode);
2568 * Stop anything previously setup. This is safe
2569 * no matter this is the first time through or not.
2571 ath5k_stop_locked(sc);
2574 * The basic interface to setting the hardware in a good
2575 * state is ``reset''. On return the hardware is known to
2576 * be powered up and with interrupts disabled. This must
2577 * be followed by initialization of the appropriate bits
2578 * and then setup of the interrupt mask.
2580 sc->curchan = sc->hw->conf.channel;
2581 sc->imask = AR5K_INT_RXOK | AR5K_INT_RXERR | AR5K_INT_RXEOL |
2582 AR5K_INT_RXORN | AR5K_INT_TXDESC | AR5K_INT_TXEOL |
2583 AR5K_INT_FATAL | AR5K_INT_GLOBAL | AR5K_INT_MIB;
2585 ret = ath5k_reset(sc, NULL, false);
2589 ath5k_rfkill_hw_start(ah);
2592 * Reset the key cache since some parts do not reset the
2593 * contents on initial power up or resume from suspend.
2595 for (i = 0; i < common->keymax; i++)
2596 ath_hw_keyreset(common, (u16) i);
2598 /* Use higher rates for acks instead of base
2600 ah->ah_ack_bitrate_high = true;
2602 for (i = 0; i < ARRAY_SIZE(sc->bslot); i++)
2603 sc->bslot[i] = NULL;
2608 mutex_unlock(&sc->lock);
2610 ieee80211_queue_delayed_work(sc->hw, &sc->tx_complete_work,
2611 msecs_to_jiffies(ATH5K_TX_COMPLETE_POLL_INT));
2616 static void ath5k_stop_tasklets(struct ath5k_softc *sc)
2618 sc->rx_pending = false;
2619 sc->tx_pending = false;
2620 tasklet_kill(&sc->rxtq);
2621 tasklet_kill(&sc->txtq);
2622 tasklet_kill(&sc->calib);
2623 tasklet_kill(&sc->beacontq);
2624 tasklet_kill(&sc->ani_tasklet);
2628 * Stop the device, grabbing the top-level lock to protect
2629 * against concurrent entry through ath5k_init (which can happen
2630 * if another thread does a system call and the thread doing the
2631 * stop is preempted).
2634 ath5k_stop_hw(struct ath5k_softc *sc)
2638 mutex_lock(&sc->lock);
2639 ret = ath5k_stop_locked(sc);
2640 if (ret == 0 && !test_bit(ATH_STAT_INVALID, sc->status)) {
2642 * Don't set the card in full sleep mode!
2644 * a) When the device is in this state it must be carefully
2645 * woken up or references to registers in the PCI clock
2646 * domain may freeze the bus (and system). This varies
2647 * by chip and is mostly an issue with newer parts
2648 * (madwifi sources mentioned srev >= 0x78) that go to
2649 * sleep more quickly.
2651 * b) On older chips full sleep results a weird behaviour
2652 * during wakeup. I tested various cards with srev < 0x78
2653 * and they don't wake up after module reload, a second
2654 * module reload is needed to bring the card up again.
2656 * Until we figure out what's going on don't enable
2657 * full chip reset on any chip (this is what Legacy HAL
2658 * and Sam's HAL do anyway). Instead Perform a full reset
2659 * on the device (same as initial state after attach) and
2660 * leave it idle (keep MAC/BB on warm reset) */
2661 ret = ath5k_hw_on_hold(sc->ah);
2663 ATH5K_DBG(sc, ATH5K_DEBUG_RESET,
2664 "putting device to sleep\n");
2668 mutex_unlock(&sc->lock);
2670 ath5k_stop_tasklets(sc);
2672 cancel_delayed_work_sync(&sc->tx_complete_work);
2674 ath5k_rfkill_hw_stop(sc->ah);
2680 * Reset the hardware. If chan is not NULL, then also pause rx/tx
2681 * and change to the given channel.
2683 * This should be called with sc->lock.
2686 ath5k_reset(struct ath5k_softc *sc, struct ieee80211_channel *chan,
2689 struct ath5k_hw *ah = sc->ah;
2690 struct ath_common *common = ath5k_hw_common(ah);
2694 ATH5K_DBG(sc, ATH5K_DEBUG_RESET, "resetting\n");
2696 ath5k_hw_set_imr(ah, 0);
2697 synchronize_irq(sc->irq);
2698 ath5k_stop_tasklets(sc);
2700 /* Save ani mode and disable ANI during
2701 * reset. If we don't we might get false
2702 * PHY error interrupts. */
2703 ani_mode = ah->ah_sc->ani_state.ani_mode;
2704 ath5k_ani_init(ah, ATH5K_ANI_MODE_OFF);
2706 /* We are going to empty hw queues
2707 * so we should also free any remaining
2709 ath5k_drain_tx_buffs(sc);
2713 fast = ((chan != NULL) && modparam_fastchanswitch) ? 1 : 0;
2715 ret = ath5k_hw_reset(ah, sc->opmode, sc->curchan, fast,
2718 ATH5K_ERR(sc, "can't reset hardware (%d)\n", ret);
2722 ret = ath5k_rx_start(sc);
2724 ATH5K_ERR(sc, "can't start recv logic\n");
2728 ath5k_ani_init(ah, ani_mode);
2730 ah->ah_cal_next_full = jiffies;
2731 ah->ah_cal_next_ani = jiffies;
2732 ah->ah_cal_next_nf = jiffies;
2733 ewma_init(&ah->ah_beacon_rssi_avg, 1024, 8);
2735 /* clear survey data and cycle counters */
2736 memset(&sc->survey, 0, sizeof(sc->survey));
2737 spin_lock_bh(&common->cc_lock);
2738 ath_hw_cycle_counters_update(common);
2739 memset(&common->cc_survey, 0, sizeof(common->cc_survey));
2740 memset(&common->cc_ani, 0, sizeof(common->cc_ani));
2741 spin_unlock_bh(&common->cc_lock);
2744 * Change channels and update the h/w rate map if we're switching;
2745 * e.g. 11a to 11b/g.
2747 * We may be doing a reset in response to an ioctl that changes the
2748 * channel so update any state that might change as a result.
2752 /* ath5k_chan_change(sc, c); */
2754 ath5k_beacon_config(sc);
2755 /* intrs are enabled by ath5k_beacon_config */
2757 ieee80211_wake_queues(sc->hw);
2764 static void ath5k_reset_work(struct work_struct *work)
2766 struct ath5k_softc *sc = container_of(work, struct ath5k_softc,
2769 mutex_lock(&sc->lock);
2770 ath5k_reset(sc, NULL, true);
2771 mutex_unlock(&sc->lock);
2775 ath5k_init(struct ieee80211_hw *hw)
2778 struct ath5k_softc *sc = hw->priv;
2779 struct ath5k_hw *ah = sc->ah;
2780 struct ath_regulatory *regulatory = ath5k_hw_regulatory(ah);
2781 struct ath5k_txq *txq;
2782 u8 mac[ETH_ALEN] = {};
2787 * Check if the MAC has multi-rate retry support.
2788 * We do this by trying to setup a fake extended
2789 * descriptor. MACs that don't have support will
2790 * return false w/o doing anything. MACs that do
2791 * support it will return true w/o doing anything.
2793 ret = ath5k_hw_setup_mrr_tx_desc(ah, NULL, 0, 0, 0, 0, 0, 0);
2798 __set_bit(ATH_STAT_MRRETRY, sc->status);
2801 * Collect the channel list. The 802.11 layer
2802 * is resposible for filtering this list based
2803 * on settings like the phy mode and regulatory
2804 * domain restrictions.
2806 ret = ath5k_setup_bands(hw);
2808 ATH5K_ERR(sc, "can't get channels\n");
2813 * Allocate tx+rx descriptors and populate the lists.
2815 ret = ath5k_desc_alloc(sc);
2817 ATH5K_ERR(sc, "can't allocate descriptors\n");
2822 * Allocate hardware transmit queues: one queue for
2823 * beacon frames and one data queue for each QoS
2824 * priority. Note that hw functions handle resetting
2825 * these queues at the needed time.
2827 ret = ath5k_beaconq_setup(ah);
2829 ATH5K_ERR(sc, "can't setup a beacon xmit queue\n");
2833 sc->cabq = ath5k_txq_setup(sc, AR5K_TX_QUEUE_CAB, 0);
2834 if (IS_ERR(sc->cabq)) {
2835 ATH5K_ERR(sc, "can't setup cab queue\n");
2836 ret = PTR_ERR(sc->cabq);
2840 /* 5211 and 5212 usually support 10 queues but we better rely on the
2841 * capability information */
2842 if (ah->ah_capabilities.cap_queues.q_tx_num >= 6) {
2843 /* This order matches mac80211's queue priority, so we can
2844 * directly use the mac80211 queue number without any mapping */
2845 txq = ath5k_txq_setup(sc, AR5K_TX_QUEUE_DATA, AR5K_WME_AC_VO);
2847 ATH5K_ERR(sc, "can't setup xmit queue\n");
2851 txq = ath5k_txq_setup(sc, AR5K_TX_QUEUE_DATA, AR5K_WME_AC_VI);
2853 ATH5K_ERR(sc, "can't setup xmit queue\n");
2857 txq = ath5k_txq_setup(sc, AR5K_TX_QUEUE_DATA, AR5K_WME_AC_BE);
2859 ATH5K_ERR(sc, "can't setup xmit queue\n");
2863 txq = ath5k_txq_setup(sc, AR5K_TX_QUEUE_DATA, AR5K_WME_AC_BK);
2865 ATH5K_ERR(sc, "can't setup xmit queue\n");
2871 /* older hardware (5210) can only support one data queue */
2872 txq = ath5k_txq_setup(sc, AR5K_TX_QUEUE_DATA, AR5K_WME_AC_BE);
2874 ATH5K_ERR(sc, "can't setup xmit queue\n");
2881 tasklet_init(&sc->rxtq, ath5k_tasklet_rx, (unsigned long)sc);
2882 tasklet_init(&sc->txtq, ath5k_tasklet_tx, (unsigned long)sc);
2883 tasklet_init(&sc->calib, ath5k_tasklet_calibrate, (unsigned long)sc);
2884 tasklet_init(&sc->beacontq, ath5k_tasklet_beacon, (unsigned long)sc);
2885 tasklet_init(&sc->ani_tasklet, ath5k_tasklet_ani, (unsigned long)sc);
2887 INIT_WORK(&sc->reset_work, ath5k_reset_work);
2888 INIT_DELAYED_WORK(&sc->tx_complete_work, ath5k_tx_complete_poll_work);
2890 ret = ath5k_hw_common(ah)->bus_ops->eeprom_read_mac(ah, mac);
2892 ATH5K_ERR(sc, "unable to read address from EEPROM\n");
2896 SET_IEEE80211_PERM_ADDR(hw, mac);
2897 memcpy(&sc->lladdr, mac, ETH_ALEN);
2898 /* All MAC address bits matter for ACKs */
2899 ath5k_update_bssid_mask_and_opmode(sc, NULL);
2901 regulatory->current_rd = ah->ah_capabilities.cap_eeprom.ee_regdomain;
2902 ret = ath_regd_init(regulatory, hw->wiphy, ath5k_reg_notifier);
2904 ATH5K_ERR(sc, "can't initialize regulatory system\n");
2908 ret = ieee80211_register_hw(hw);
2910 ATH5K_ERR(sc, "can't register ieee80211 hw\n");
2914 if (!ath_is_world_regd(regulatory))
2915 regulatory_hint(hw->wiphy, regulatory->alpha2);
2917 ath5k_init_leds(sc);
2919 ath5k_sysfs_register(sc);
2923 ath5k_txq_release(sc);
2925 ath5k_hw_release_tx_queue(ah, sc->bhalq);
2927 ath5k_desc_free(sc);
2933 ath5k_deinit_softc(struct ath5k_softc *sc)
2935 struct ieee80211_hw *hw = sc->hw;
2938 * NB: the order of these is important:
2939 * o call the 802.11 layer before detaching ath5k_hw to
2940 * ensure callbacks into the driver to delete global
2941 * key cache entries can be handled
2942 * o reclaim the tx queue data structures after calling
2943 * the 802.11 layer as we'll get called back to reclaim
2944 * node state and potentially want to use them
2945 * o to cleanup the tx queues the hal is called, so detach
2947 * XXX: ??? detach ath5k_hw ???
2948 * Other than that, it's straightforward...
2950 ieee80211_unregister_hw(hw);
2951 ath5k_desc_free(sc);
2952 ath5k_txq_release(sc);
2953 ath5k_hw_release_tx_queue(sc->ah, sc->bhalq);
2954 ath5k_unregister_leds(sc);
2956 ath5k_sysfs_unregister(sc);
2958 * NB: can't reclaim these until after ieee80211_ifdetach
2959 * returns because we'll get called back to reclaim node
2960 * state and potentially want to use them.
2962 ath5k_hw_deinit(sc->ah);
2963 free_irq(sc->irq, sc);
2967 ath5k_any_vif_assoc(struct ath5k_softc *sc)
2969 struct ath5k_vif_iter_data iter_data;
2970 iter_data.hw_macaddr = NULL;
2971 iter_data.any_assoc = false;
2972 iter_data.need_set_hw_addr = false;
2973 iter_data.found_active = true;
2975 ieee80211_iterate_active_interfaces_atomic(sc->hw, ath5k_vif_iter,
2977 return iter_data.any_assoc;
2981 ath5k_set_beacon_filter(struct ieee80211_hw *hw, bool enable)
2983 struct ath5k_softc *sc = hw->priv;
2984 struct ath5k_hw *ah = sc->ah;
2986 rfilt = ath5k_hw_get_rx_filter(ah);
2988 rfilt |= AR5K_RX_FILTER_BEACON;
2990 rfilt &= ~AR5K_RX_FILTER_BEACON;
2991 ath5k_hw_set_rx_filter(ah, rfilt);
2992 sc->filter_flags = rfilt;