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/dma-mapping.h>
46 #include <linux/hardirq.h>
49 #include <linux/netdevice.h>
50 #include <linux/cache.h>
51 #include <linux/ethtool.h>
52 #include <linux/uaccess.h>
53 #include <linux/slab.h>
54 #include <linux/etherdevice.h>
56 #include <net/ieee80211_radiotap.h>
58 #include <asm/unaligned.h>
65 #define CREATE_TRACE_POINTS
68 int ath5k_modparam_nohwcrypt;
69 module_param_named(nohwcrypt, ath5k_modparam_nohwcrypt, bool, S_IRUGO);
70 MODULE_PARM_DESC(nohwcrypt, "Disable hardware encryption.");
72 static int modparam_all_channels;
73 module_param_named(all_channels, modparam_all_channels, bool, S_IRUGO);
74 MODULE_PARM_DESC(all_channels, "Expose all channels the device can use.");
76 static int modparam_fastchanswitch;
77 module_param_named(fastchanswitch, modparam_fastchanswitch, bool, S_IRUGO);
78 MODULE_PARM_DESC(fastchanswitch, "Enable fast channel switching for AR2413/AR5413 radios.");
82 MODULE_AUTHOR("Jiri Slaby");
83 MODULE_AUTHOR("Nick Kossifidis");
84 MODULE_DESCRIPTION("Support for 5xxx series of Atheros 802.11 wireless LAN cards.");
85 MODULE_SUPPORTED_DEVICE("Atheros 5xxx WLAN cards");
86 MODULE_LICENSE("Dual BSD/GPL");
88 static int ath5k_init(struct ieee80211_hw *hw);
89 static int ath5k_reset(struct ath5k_softc *sc, struct ieee80211_channel *chan,
93 static const struct ath5k_srev_name srev_names[] = {
94 #ifdef CONFIG_ATHEROS_AR231X
95 { "5312", AR5K_VERSION_MAC, AR5K_SREV_AR5312_R2 },
96 { "5312", AR5K_VERSION_MAC, AR5K_SREV_AR5312_R7 },
97 { "2313", AR5K_VERSION_MAC, AR5K_SREV_AR2313_R8 },
98 { "2315", AR5K_VERSION_MAC, AR5K_SREV_AR2315_R6 },
99 { "2315", AR5K_VERSION_MAC, AR5K_SREV_AR2315_R7 },
100 { "2317", AR5K_VERSION_MAC, AR5K_SREV_AR2317_R1 },
101 { "2317", AR5K_VERSION_MAC, AR5K_SREV_AR2317_R2 },
103 { "5210", AR5K_VERSION_MAC, AR5K_SREV_AR5210 },
104 { "5311", AR5K_VERSION_MAC, AR5K_SREV_AR5311 },
105 { "5311A", AR5K_VERSION_MAC, AR5K_SREV_AR5311A },
106 { "5311B", AR5K_VERSION_MAC, AR5K_SREV_AR5311B },
107 { "5211", AR5K_VERSION_MAC, AR5K_SREV_AR5211 },
108 { "5212", AR5K_VERSION_MAC, AR5K_SREV_AR5212 },
109 { "5213", AR5K_VERSION_MAC, AR5K_SREV_AR5213 },
110 { "5213A", AR5K_VERSION_MAC, AR5K_SREV_AR5213A },
111 { "2413", AR5K_VERSION_MAC, AR5K_SREV_AR2413 },
112 { "2414", AR5K_VERSION_MAC, AR5K_SREV_AR2414 },
113 { "5424", AR5K_VERSION_MAC, AR5K_SREV_AR5424 },
114 { "5413", AR5K_VERSION_MAC, AR5K_SREV_AR5413 },
115 { "5414", AR5K_VERSION_MAC, AR5K_SREV_AR5414 },
116 { "2415", AR5K_VERSION_MAC, AR5K_SREV_AR2415 },
117 { "5416", AR5K_VERSION_MAC, AR5K_SREV_AR5416 },
118 { "5418", AR5K_VERSION_MAC, AR5K_SREV_AR5418 },
119 { "2425", AR5K_VERSION_MAC, AR5K_SREV_AR2425 },
120 { "2417", AR5K_VERSION_MAC, AR5K_SREV_AR2417 },
122 { "xxxxx", AR5K_VERSION_MAC, AR5K_SREV_UNKNOWN },
123 { "5110", AR5K_VERSION_RAD, AR5K_SREV_RAD_5110 },
124 { "5111", AR5K_VERSION_RAD, AR5K_SREV_RAD_5111 },
125 { "5111A", AR5K_VERSION_RAD, AR5K_SREV_RAD_5111A },
126 { "2111", AR5K_VERSION_RAD, AR5K_SREV_RAD_2111 },
127 { "5112", AR5K_VERSION_RAD, AR5K_SREV_RAD_5112 },
128 { "5112A", AR5K_VERSION_RAD, AR5K_SREV_RAD_5112A },
129 { "5112B", AR5K_VERSION_RAD, AR5K_SREV_RAD_5112B },
130 { "2112", AR5K_VERSION_RAD, AR5K_SREV_RAD_2112 },
131 { "2112A", AR5K_VERSION_RAD, AR5K_SREV_RAD_2112A },
132 { "2112B", AR5K_VERSION_RAD, AR5K_SREV_RAD_2112B },
133 { "2413", AR5K_VERSION_RAD, AR5K_SREV_RAD_2413 },
134 { "5413", AR5K_VERSION_RAD, AR5K_SREV_RAD_5413 },
135 { "5424", AR5K_VERSION_RAD, AR5K_SREV_RAD_5424 },
136 { "5133", AR5K_VERSION_RAD, AR5K_SREV_RAD_5133 },
137 #ifdef CONFIG_ATHEROS_AR231X
138 { "2316", AR5K_VERSION_RAD, AR5K_SREV_RAD_2316 },
139 { "2317", AR5K_VERSION_RAD, AR5K_SREV_RAD_2317 },
141 { "xxxxx", AR5K_VERSION_RAD, AR5K_SREV_UNKNOWN },
144 static const struct ieee80211_rate ath5k_rates[] = {
146 .hw_value = ATH5K_RATE_CODE_1M, },
148 .hw_value = ATH5K_RATE_CODE_2M,
149 .hw_value_short = ATH5K_RATE_CODE_2M | AR5K_SET_SHORT_PREAMBLE,
150 .flags = IEEE80211_RATE_SHORT_PREAMBLE },
152 .hw_value = ATH5K_RATE_CODE_5_5M,
153 .hw_value_short = ATH5K_RATE_CODE_5_5M | AR5K_SET_SHORT_PREAMBLE,
154 .flags = IEEE80211_RATE_SHORT_PREAMBLE },
156 .hw_value = ATH5K_RATE_CODE_11M,
157 .hw_value_short = ATH5K_RATE_CODE_11M | AR5K_SET_SHORT_PREAMBLE,
158 .flags = IEEE80211_RATE_SHORT_PREAMBLE },
160 .hw_value = ATH5K_RATE_CODE_6M,
163 .hw_value = ATH5K_RATE_CODE_9M,
166 .hw_value = ATH5K_RATE_CODE_12M,
169 .hw_value = ATH5K_RATE_CODE_18M,
172 .hw_value = ATH5K_RATE_CODE_24M,
175 .hw_value = ATH5K_RATE_CODE_36M,
178 .hw_value = ATH5K_RATE_CODE_48M,
181 .hw_value = ATH5K_RATE_CODE_54M,
186 static inline u64 ath5k_extend_tsf(struct ath5k_hw *ah, u32 rstamp)
188 u64 tsf = ath5k_hw_get_tsf64(ah);
190 if ((tsf & 0x7fff) < rstamp)
193 return (tsf & ~0x7fff) | rstamp;
197 ath5k_chip_name(enum ath5k_srev_type type, u_int16_t val)
199 const char *name = "xxxxx";
202 for (i = 0; i < ARRAY_SIZE(srev_names); i++) {
203 if (srev_names[i].sr_type != type)
206 if ((val & 0xf0) == srev_names[i].sr_val)
207 name = srev_names[i].sr_name;
209 if ((val & 0xff) == srev_names[i].sr_val) {
210 name = srev_names[i].sr_name;
217 static unsigned int ath5k_ioread32(void *hw_priv, u32 reg_offset)
219 struct ath5k_hw *ah = (struct ath5k_hw *) hw_priv;
220 return ath5k_hw_reg_read(ah, reg_offset);
223 static void ath5k_iowrite32(void *hw_priv, u32 val, u32 reg_offset)
225 struct ath5k_hw *ah = (struct ath5k_hw *) hw_priv;
226 ath5k_hw_reg_write(ah, val, reg_offset);
229 static const struct ath_ops ath5k_common_ops = {
230 .read = ath5k_ioread32,
231 .write = ath5k_iowrite32,
234 /***********************\
235 * Driver Initialization *
236 \***********************/
238 static int ath5k_reg_notifier(struct wiphy *wiphy, struct regulatory_request *request)
240 struct ieee80211_hw *hw = wiphy_to_ieee80211_hw(wiphy);
241 struct ath5k_softc *sc = hw->priv;
242 struct ath_regulatory *regulatory = ath5k_hw_regulatory(sc->ah);
244 return ath_reg_notifier_apply(wiphy, request, regulatory);
247 /********************\
248 * Channel/mode setup *
249 \********************/
252 * Returns true for the channel numbers used without all_channels modparam.
254 static bool ath5k_is_standard_channel(short chan, enum ieee80211_band band)
256 if (band == IEEE80211_BAND_2GHZ && chan <= 14)
259 return /* UNII 1,2 */
260 (((chan & 3) == 0 && chan >= 36 && chan <= 64) ||
262 ((chan & 3) == 0 && chan >= 100 && chan <= 140) ||
264 ((chan & 3) == 1 && chan >= 149 && chan <= 165) ||
265 /* 802.11j 5.030-5.080 GHz (20MHz) */
266 (chan == 8 || chan == 12 || chan == 16) ||
267 /* 802.11j 4.9GHz (20MHz) */
268 (chan == 184 || chan == 188 || chan == 192 || chan == 196));
272 ath5k_setup_channels(struct ath5k_hw *ah, struct ieee80211_channel *channels,
273 unsigned int mode, unsigned int max)
275 unsigned int count, size, chfreq, freq, ch;
276 enum ieee80211_band band;
280 /* 1..220, but 2GHz frequencies are filtered by check_channel */
282 chfreq = CHANNEL_5GHZ;
283 band = IEEE80211_BAND_5GHZ;
288 chfreq = CHANNEL_2GHZ;
289 band = IEEE80211_BAND_2GHZ;
292 ATH5K_WARN(ah->ah_sc, "bad mode, not copying channels\n");
297 for (ch = 1; ch <= size && count < max; ch++) {
298 freq = ieee80211_channel_to_frequency(ch, band);
300 if (freq == 0) /* mapping failed - not a standard channel */
303 /* Check if channel is supported by the chipset */
304 if (!ath5k_channel_ok(ah, freq, chfreq))
307 if (!modparam_all_channels &&
308 !ath5k_is_standard_channel(ch, band))
311 /* Write channel info and increment counter */
312 channels[count].center_freq = freq;
313 channels[count].band = band;
317 channels[count].hw_value = chfreq | CHANNEL_OFDM;
320 channels[count].hw_value = CHANNEL_B;
330 ath5k_setup_rate_idx(struct ath5k_softc *sc, struct ieee80211_supported_band *b)
334 for (i = 0; i < AR5K_MAX_RATES; i++)
335 sc->rate_idx[b->band][i] = -1;
337 for (i = 0; i < b->n_bitrates; i++) {
338 sc->rate_idx[b->band][b->bitrates[i].hw_value] = i;
339 if (b->bitrates[i].hw_value_short)
340 sc->rate_idx[b->band][b->bitrates[i].hw_value_short] = i;
345 ath5k_setup_bands(struct ieee80211_hw *hw)
347 struct ath5k_softc *sc = hw->priv;
348 struct ath5k_hw *ah = sc->ah;
349 struct ieee80211_supported_band *sband;
350 int max_c, count_c = 0;
353 BUILD_BUG_ON(ARRAY_SIZE(sc->sbands) < IEEE80211_NUM_BANDS);
354 max_c = ARRAY_SIZE(sc->channels);
357 sband = &sc->sbands[IEEE80211_BAND_2GHZ];
358 sband->band = IEEE80211_BAND_2GHZ;
359 sband->bitrates = &sc->rates[IEEE80211_BAND_2GHZ][0];
361 if (test_bit(AR5K_MODE_11G, sc->ah->ah_capabilities.cap_mode)) {
363 memcpy(sband->bitrates, &ath5k_rates[0],
364 sizeof(struct ieee80211_rate) * 12);
365 sband->n_bitrates = 12;
367 sband->channels = sc->channels;
368 sband->n_channels = ath5k_setup_channels(ah, sband->channels,
369 AR5K_MODE_11G, max_c);
371 hw->wiphy->bands[IEEE80211_BAND_2GHZ] = sband;
372 count_c = sband->n_channels;
374 } else if (test_bit(AR5K_MODE_11B, sc->ah->ah_capabilities.cap_mode)) {
376 memcpy(sband->bitrates, &ath5k_rates[0],
377 sizeof(struct ieee80211_rate) * 4);
378 sband->n_bitrates = 4;
380 /* 5211 only supports B rates and uses 4bit rate codes
381 * (e.g normally we have 0x1B for 1M, but on 5211 we have 0x0B)
384 if (ah->ah_version == AR5K_AR5211) {
385 for (i = 0; i < 4; i++) {
386 sband->bitrates[i].hw_value =
387 sband->bitrates[i].hw_value & 0xF;
388 sband->bitrates[i].hw_value_short =
389 sband->bitrates[i].hw_value_short & 0xF;
393 sband->channels = sc->channels;
394 sband->n_channels = ath5k_setup_channels(ah, sband->channels,
395 AR5K_MODE_11B, max_c);
397 hw->wiphy->bands[IEEE80211_BAND_2GHZ] = sband;
398 count_c = sband->n_channels;
401 ath5k_setup_rate_idx(sc, sband);
403 /* 5GHz band, A mode */
404 if (test_bit(AR5K_MODE_11A, sc->ah->ah_capabilities.cap_mode)) {
405 sband = &sc->sbands[IEEE80211_BAND_5GHZ];
406 sband->band = IEEE80211_BAND_5GHZ;
407 sband->bitrates = &sc->rates[IEEE80211_BAND_5GHZ][0];
409 memcpy(sband->bitrates, &ath5k_rates[4],
410 sizeof(struct ieee80211_rate) * 8);
411 sband->n_bitrates = 8;
413 sband->channels = &sc->channels[count_c];
414 sband->n_channels = ath5k_setup_channels(ah, sband->channels,
415 AR5K_MODE_11A, max_c);
417 hw->wiphy->bands[IEEE80211_BAND_5GHZ] = sband;
419 ath5k_setup_rate_idx(sc, sband);
421 ath5k_debug_dump_bands(sc);
427 * Set/change channels. We always reset the chip.
428 * To accomplish this we must first cleanup any pending DMA,
429 * then restart stuff after a la ath5k_init.
431 * Called with sc->lock.
434 ath5k_chan_set(struct ath5k_softc *sc, struct ieee80211_channel *chan)
436 ATH5K_DBG(sc, ATH5K_DEBUG_RESET,
437 "channel set, resetting (%u -> %u MHz)\n",
438 sc->curchan->center_freq, chan->center_freq);
441 * To switch channels clear any pending DMA operations;
442 * wait long enough for the RX fifo to drain, reset the
443 * hardware at the new frequency, and then re-enable
444 * the relevant bits of the h/w.
446 return ath5k_reset(sc, chan, true);
449 void ath5k_vif_iter(void *data, u8 *mac, struct ieee80211_vif *vif)
451 struct ath5k_vif_iter_data *iter_data = data;
453 struct ath5k_vif *avf = (void *)vif->drv_priv;
455 if (iter_data->hw_macaddr)
456 for (i = 0; i < ETH_ALEN; i++)
457 iter_data->mask[i] &=
458 ~(iter_data->hw_macaddr[i] ^ mac[i]);
460 if (!iter_data->found_active) {
461 iter_data->found_active = true;
462 memcpy(iter_data->active_mac, mac, ETH_ALEN);
465 if (iter_data->need_set_hw_addr && iter_data->hw_macaddr)
466 if (compare_ether_addr(iter_data->hw_macaddr, mac) == 0)
467 iter_data->need_set_hw_addr = false;
469 if (!iter_data->any_assoc) {
471 iter_data->any_assoc = true;
474 /* Calculate combined mode - when APs are active, operate in AP mode.
475 * Otherwise use the mode of the new interface. This can currently
476 * only deal with combinations of APs and STAs. Only one ad-hoc
477 * interfaces is allowed.
479 if (avf->opmode == NL80211_IFTYPE_AP)
480 iter_data->opmode = NL80211_IFTYPE_AP;
482 if (avf->opmode == NL80211_IFTYPE_STATION)
484 if (iter_data->opmode == NL80211_IFTYPE_UNSPECIFIED)
485 iter_data->opmode = avf->opmode;
490 ath5k_update_bssid_mask_and_opmode(struct ath5k_softc *sc,
491 struct ieee80211_vif *vif)
493 struct ath_common *common = ath5k_hw_common(sc->ah);
494 struct ath5k_vif_iter_data iter_data;
498 * Use the hardware MAC address as reference, the hardware uses it
499 * together with the BSSID mask when matching addresses.
501 iter_data.hw_macaddr = common->macaddr;
502 memset(&iter_data.mask, 0xff, ETH_ALEN);
503 iter_data.found_active = false;
504 iter_data.need_set_hw_addr = true;
505 iter_data.opmode = NL80211_IFTYPE_UNSPECIFIED;
506 iter_data.n_stas = 0;
509 ath5k_vif_iter(&iter_data, vif->addr, vif);
511 /* Get list of all active MAC addresses */
512 ieee80211_iterate_active_interfaces_atomic(sc->hw, ath5k_vif_iter,
514 memcpy(sc->bssidmask, iter_data.mask, ETH_ALEN);
516 sc->opmode = iter_data.opmode;
517 if (sc->opmode == NL80211_IFTYPE_UNSPECIFIED)
518 /* Nothing active, default to station mode */
519 sc->opmode = NL80211_IFTYPE_STATION;
521 ath5k_hw_set_opmode(sc->ah, sc->opmode);
522 ATH5K_DBG(sc, ATH5K_DEBUG_MODE, "mode setup opmode %d (%s)\n",
523 sc->opmode, ath_opmode_to_string(sc->opmode));
525 if (iter_data.need_set_hw_addr && iter_data.found_active)
526 ath5k_hw_set_lladdr(sc->ah, iter_data.active_mac);
528 if (ath5k_hw_hasbssidmask(sc->ah))
529 ath5k_hw_set_bssid_mask(sc->ah, sc->bssidmask);
531 /* Set up RX Filter */
532 if (iter_data.n_stas > 1) {
533 /* If you have multiple STA interfaces connected to
534 * different APs, ARPs are not received (most of the time?)
535 * Enabling PROMISC appears to fix that probem.
537 sc->filter_flags |= AR5K_RX_FILTER_PROM;
540 rfilt = sc->filter_flags;
541 ath5k_hw_set_rx_filter(sc->ah, rfilt);
542 ATH5K_DBG(sc, ATH5K_DEBUG_MODE, "RX filter 0x%x\n", rfilt);
546 ath5k_hw_to_driver_rix(struct ath5k_softc *sc, int hw_rix)
550 /* return base rate on errors */
551 if (WARN(hw_rix < 0 || hw_rix >= AR5K_MAX_RATES,
552 "hw_rix out of bounds: %x\n", hw_rix))
555 rix = sc->rate_idx[sc->curchan->band][hw_rix];
556 if (WARN(rix < 0, "invalid hw_rix: %x\n", hw_rix))
567 struct sk_buff *ath5k_rx_skb_alloc(struct ath5k_softc *sc, dma_addr_t *skb_addr)
569 struct ath_common *common = ath5k_hw_common(sc->ah);
573 * Allocate buffer with headroom_needed space for the
574 * fake physical layer header at the start.
576 skb = ath_rxbuf_alloc(common,
581 ATH5K_ERR(sc, "can't alloc skbuff of size %u\n",
586 *skb_addr = dma_map_single(sc->dev,
587 skb->data, common->rx_bufsize,
590 if (unlikely(dma_mapping_error(sc->dev, *skb_addr))) {
591 ATH5K_ERR(sc, "%s: DMA mapping failed\n", __func__);
599 ath5k_rxbuf_setup(struct ath5k_softc *sc, struct ath5k_buf *bf)
601 struct ath5k_hw *ah = sc->ah;
602 struct sk_buff *skb = bf->skb;
603 struct ath5k_desc *ds;
607 skb = ath5k_rx_skb_alloc(sc, &bf->skbaddr);
614 * Setup descriptors. For receive we always terminate
615 * the descriptor list with a self-linked entry so we'll
616 * not get overrun under high load (as can happen with a
617 * 5212 when ANI processing enables PHY error frames).
619 * To ensure the last descriptor is self-linked we create
620 * each descriptor as self-linked and add it to the end. As
621 * each additional descriptor is added the previous self-linked
622 * entry is "fixed" naturally. This should be safe even
623 * if DMA is happening. When processing RX interrupts we
624 * never remove/process the last, self-linked, entry on the
625 * descriptor list. This ensures the hardware always has
626 * someplace to write a new frame.
629 ds->ds_link = bf->daddr; /* link to self */
630 ds->ds_data = bf->skbaddr;
631 ret = ath5k_hw_setup_rx_desc(ah, ds, ah->common.rx_bufsize, 0);
633 ATH5K_ERR(sc, "%s: could not setup RX desc\n", __func__);
637 if (sc->rxlink != NULL)
638 *sc->rxlink = bf->daddr;
639 sc->rxlink = &ds->ds_link;
643 static enum ath5k_pkt_type get_hw_packet_type(struct sk_buff *skb)
645 struct ieee80211_hdr *hdr;
646 enum ath5k_pkt_type htype;
649 hdr = (struct ieee80211_hdr *)skb->data;
650 fc = hdr->frame_control;
652 if (ieee80211_is_beacon(fc))
653 htype = AR5K_PKT_TYPE_BEACON;
654 else if (ieee80211_is_probe_resp(fc))
655 htype = AR5K_PKT_TYPE_PROBE_RESP;
656 else if (ieee80211_is_atim(fc))
657 htype = AR5K_PKT_TYPE_ATIM;
658 else if (ieee80211_is_pspoll(fc))
659 htype = AR5K_PKT_TYPE_PSPOLL;
661 htype = AR5K_PKT_TYPE_NORMAL;
667 ath5k_txbuf_setup(struct ath5k_softc *sc, struct ath5k_buf *bf,
668 struct ath5k_txq *txq, int padsize)
670 struct ath5k_hw *ah = sc->ah;
671 struct ath5k_desc *ds = bf->desc;
672 struct sk_buff *skb = bf->skb;
673 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
674 unsigned int pktlen, flags, keyidx = AR5K_TXKEYIX_INVALID;
675 struct ieee80211_rate *rate;
676 unsigned int mrr_rate[3], mrr_tries[3];
683 flags = AR5K_TXDESC_INTREQ | AR5K_TXDESC_CLRDMASK;
686 bf->skbaddr = dma_map_single(sc->dev, skb->data, skb->len,
689 rate = ieee80211_get_tx_rate(sc->hw, info);
695 if (info->flags & IEEE80211_TX_CTL_NO_ACK)
696 flags |= AR5K_TXDESC_NOACK;
698 rc_flags = info->control.rates[0].flags;
699 hw_rate = (rc_flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE) ?
700 rate->hw_value_short : rate->hw_value;
704 /* FIXME: If we are in g mode and rate is a CCK rate
705 * subtract ah->ah_txpower.txp_cck_ofdm_pwr_delta
706 * from tx power (value is in dB units already) */
707 if (info->control.hw_key) {
708 keyidx = info->control.hw_key->hw_key_idx;
709 pktlen += info->control.hw_key->icv_len;
711 if (rc_flags & IEEE80211_TX_RC_USE_RTS_CTS) {
712 flags |= AR5K_TXDESC_RTSENA;
713 cts_rate = ieee80211_get_rts_cts_rate(sc->hw, info)->hw_value;
714 duration = le16_to_cpu(ieee80211_rts_duration(sc->hw,
715 info->control.vif, pktlen, info));
717 if (rc_flags & IEEE80211_TX_RC_USE_CTS_PROTECT) {
718 flags |= AR5K_TXDESC_CTSENA;
719 cts_rate = ieee80211_get_rts_cts_rate(sc->hw, info)->hw_value;
720 duration = le16_to_cpu(ieee80211_ctstoself_duration(sc->hw,
721 info->control.vif, pktlen, info));
723 ret = ah->ah_setup_tx_desc(ah, ds, pktlen,
724 ieee80211_get_hdrlen_from_skb(skb), padsize,
725 get_hw_packet_type(skb),
726 (sc->power_level * 2),
728 info->control.rates[0].count, keyidx, ah->ah_tx_ant, flags,
733 memset(mrr_rate, 0, sizeof(mrr_rate));
734 memset(mrr_tries, 0, sizeof(mrr_tries));
735 for (i = 0; i < 3; i++) {
736 rate = ieee80211_get_alt_retry_rate(sc->hw, info, i);
740 mrr_rate[i] = rate->hw_value;
741 mrr_tries[i] = info->control.rates[i + 1].count;
744 ath5k_hw_setup_mrr_tx_desc(ah, ds,
745 mrr_rate[0], mrr_tries[0],
746 mrr_rate[1], mrr_tries[1],
747 mrr_rate[2], mrr_tries[2]);
750 ds->ds_data = bf->skbaddr;
752 spin_lock_bh(&txq->lock);
753 list_add_tail(&bf->list, &txq->q);
755 if (txq->link == NULL) /* is this first packet? */
756 ath5k_hw_set_txdp(ah, txq->qnum, bf->daddr);
757 else /* no, so only link it */
758 *txq->link = bf->daddr;
760 txq->link = &ds->ds_link;
761 ath5k_hw_start_tx_dma(ah, txq->qnum);
763 spin_unlock_bh(&txq->lock);
767 dma_unmap_single(sc->dev, bf->skbaddr, skb->len, DMA_TO_DEVICE);
771 /*******************\
772 * Descriptors setup *
773 \*******************/
776 ath5k_desc_alloc(struct ath5k_softc *sc)
778 struct ath5k_desc *ds;
779 struct ath5k_buf *bf;
784 /* allocate descriptors */
785 sc->desc_len = sizeof(struct ath5k_desc) *
786 (ATH_TXBUF + ATH_RXBUF + ATH_BCBUF + 1);
788 sc->desc = dma_alloc_coherent(sc->dev, sc->desc_len,
789 &sc->desc_daddr, GFP_KERNEL);
790 if (sc->desc == NULL) {
791 ATH5K_ERR(sc, "can't allocate descriptors\n");
797 ATH5K_DBG(sc, ATH5K_DEBUG_ANY, "DMA map: %p (%zu) -> %llx\n",
798 ds, sc->desc_len, (unsigned long long)sc->desc_daddr);
800 bf = kcalloc(1 + ATH_TXBUF + ATH_RXBUF + ATH_BCBUF,
801 sizeof(struct ath5k_buf), GFP_KERNEL);
803 ATH5K_ERR(sc, "can't allocate bufptr\n");
809 INIT_LIST_HEAD(&sc->rxbuf);
810 for (i = 0; i < ATH_RXBUF; i++, bf++, ds++, da += sizeof(*ds)) {
813 list_add_tail(&bf->list, &sc->rxbuf);
816 INIT_LIST_HEAD(&sc->txbuf);
817 sc->txbuf_len = ATH_TXBUF;
818 for (i = 0; i < ATH_TXBUF; i++, bf++, ds++,
822 list_add_tail(&bf->list, &sc->txbuf);
826 INIT_LIST_HEAD(&sc->bcbuf);
827 for (i = 0; i < ATH_BCBUF; i++, bf++, ds++, da += sizeof(*ds)) {
830 list_add_tail(&bf->list, &sc->bcbuf);
835 dma_free_coherent(sc->dev, sc->desc_len, sc->desc, sc->desc_daddr);
842 ath5k_txbuf_free_skb(struct ath5k_softc *sc, struct ath5k_buf *bf)
847 dma_unmap_single(sc->dev, bf->skbaddr, bf->skb->len,
849 dev_kfree_skb_any(bf->skb);
852 bf->desc->ds_data = 0;
856 ath5k_rxbuf_free_skb(struct ath5k_softc *sc, struct ath5k_buf *bf)
858 struct ath5k_hw *ah = sc->ah;
859 struct ath_common *common = ath5k_hw_common(ah);
864 dma_unmap_single(sc->dev, bf->skbaddr, common->rx_bufsize,
866 dev_kfree_skb_any(bf->skb);
869 bf->desc->ds_data = 0;
873 ath5k_desc_free(struct ath5k_softc *sc)
875 struct ath5k_buf *bf;
877 list_for_each_entry(bf, &sc->txbuf, list)
878 ath5k_txbuf_free_skb(sc, bf);
879 list_for_each_entry(bf, &sc->rxbuf, list)
880 ath5k_rxbuf_free_skb(sc, bf);
881 list_for_each_entry(bf, &sc->bcbuf, list)
882 ath5k_txbuf_free_skb(sc, bf);
884 /* Free memory associated with all descriptors */
885 dma_free_coherent(sc->dev, sc->desc_len, sc->desc, sc->desc_daddr);
898 static struct ath5k_txq *
899 ath5k_txq_setup(struct ath5k_softc *sc,
900 int qtype, int subtype)
902 struct ath5k_hw *ah = sc->ah;
903 struct ath5k_txq *txq;
904 struct ath5k_txq_info qi = {
905 .tqi_subtype = subtype,
906 /* XXX: default values not correct for B and XR channels,
908 .tqi_aifs = AR5K_TUNE_AIFS,
909 .tqi_cw_min = AR5K_TUNE_CWMIN,
910 .tqi_cw_max = AR5K_TUNE_CWMAX
915 * Enable interrupts only for EOL and DESC conditions.
916 * We mark tx descriptors to receive a DESC interrupt
917 * when a tx queue gets deep; otherwise we wait for the
918 * EOL to reap descriptors. Note that this is done to
919 * reduce interrupt load and this only defers reaping
920 * descriptors, never transmitting frames. Aside from
921 * reducing interrupts this also permits more concurrency.
922 * The only potential downside is if the tx queue backs
923 * up in which case the top half of the kernel may backup
924 * due to a lack of tx descriptors.
926 qi.tqi_flags = AR5K_TXQ_FLAG_TXEOLINT_ENABLE |
927 AR5K_TXQ_FLAG_TXDESCINT_ENABLE;
928 qnum = ath5k_hw_setup_tx_queue(ah, qtype, &qi);
931 * NB: don't print a message, this happens
932 * normally on parts with too few tx queues
934 return ERR_PTR(qnum);
936 if (qnum >= ARRAY_SIZE(sc->txqs)) {
937 ATH5K_ERR(sc, "hw qnum %u out of range, max %tu!\n",
938 qnum, ARRAY_SIZE(sc->txqs));
939 ath5k_hw_release_tx_queue(ah, qnum);
940 return ERR_PTR(-EINVAL);
942 txq = &sc->txqs[qnum];
946 INIT_LIST_HEAD(&txq->q);
947 spin_lock_init(&txq->lock);
950 txq->txq_max = ATH5K_TXQ_LEN_MAX;
951 txq->txq_poll_mark = false;
954 return &sc->txqs[qnum];
958 ath5k_beaconq_setup(struct ath5k_hw *ah)
960 struct ath5k_txq_info qi = {
961 /* XXX: default values not correct for B and XR channels,
963 .tqi_aifs = AR5K_TUNE_AIFS,
964 .tqi_cw_min = AR5K_TUNE_CWMIN,
965 .tqi_cw_max = AR5K_TUNE_CWMAX,
966 /* NB: for dynamic turbo, don't enable any other interrupts */
967 .tqi_flags = AR5K_TXQ_FLAG_TXDESCINT_ENABLE
970 return ath5k_hw_setup_tx_queue(ah, AR5K_TX_QUEUE_BEACON, &qi);
974 ath5k_beaconq_config(struct ath5k_softc *sc)
976 struct ath5k_hw *ah = sc->ah;
977 struct ath5k_txq_info qi;
980 ret = ath5k_hw_get_tx_queueprops(ah, sc->bhalq, &qi);
984 if (sc->opmode == NL80211_IFTYPE_AP ||
985 sc->opmode == NL80211_IFTYPE_MESH_POINT) {
987 * Always burst out beacon and CAB traffic
988 * (aifs = cwmin = cwmax = 0)
993 } else if (sc->opmode == NL80211_IFTYPE_ADHOC) {
995 * Adhoc mode; backoff between 0 and (2 * cw_min).
999 qi.tqi_cw_max = 2 * AR5K_TUNE_CWMIN;
1002 ATH5K_DBG(sc, ATH5K_DEBUG_BEACON,
1003 "beacon queueprops tqi_aifs:%d tqi_cw_min:%d tqi_cw_max:%d\n",
1004 qi.tqi_aifs, qi.tqi_cw_min, qi.tqi_cw_max);
1006 ret = ath5k_hw_set_tx_queueprops(ah, sc->bhalq, &qi);
1008 ATH5K_ERR(sc, "%s: unable to update parameters for beacon "
1009 "hardware queue!\n", __func__);
1012 ret = ath5k_hw_reset_tx_queue(ah, sc->bhalq); /* push to h/w */
1016 /* reconfigure cabq with ready time to 80% of beacon_interval */
1017 ret = ath5k_hw_get_tx_queueprops(ah, AR5K_TX_QUEUE_ID_CAB, &qi);
1021 qi.tqi_ready_time = (sc->bintval * 80) / 100;
1022 ret = ath5k_hw_set_tx_queueprops(ah, AR5K_TX_QUEUE_ID_CAB, &qi);
1026 ret = ath5k_hw_reset_tx_queue(ah, AR5K_TX_QUEUE_ID_CAB);
1032 * ath5k_drain_tx_buffs - Empty tx buffers
1034 * @sc The &struct ath5k_softc
1036 * Empty tx buffers from all queues in preparation
1037 * of a reset or during shutdown.
1039 * NB: this assumes output has been stopped and
1040 * we do not need to block ath5k_tx_tasklet
1043 ath5k_drain_tx_buffs(struct ath5k_softc *sc)
1045 struct ath5k_txq *txq;
1046 struct ath5k_buf *bf, *bf0;
1049 for (i = 0; i < ARRAY_SIZE(sc->txqs); i++) {
1050 if (sc->txqs[i].setup) {
1052 spin_lock_bh(&txq->lock);
1053 list_for_each_entry_safe(bf, bf0, &txq->q, list) {
1054 ath5k_debug_printtxbuf(sc, bf);
1056 ath5k_txbuf_free_skb(sc, bf);
1058 spin_lock_bh(&sc->txbuflock);
1059 list_move_tail(&bf->list, &sc->txbuf);
1062 spin_unlock_bh(&sc->txbuflock);
1065 txq->txq_poll_mark = false;
1066 spin_unlock_bh(&txq->lock);
1072 ath5k_txq_release(struct ath5k_softc *sc)
1074 struct ath5k_txq *txq = sc->txqs;
1077 for (i = 0; i < ARRAY_SIZE(sc->txqs); i++, txq++)
1079 ath5k_hw_release_tx_queue(sc->ah, txq->qnum);
1090 * Enable the receive h/w following a reset.
1093 ath5k_rx_start(struct ath5k_softc *sc)
1095 struct ath5k_hw *ah = sc->ah;
1096 struct ath_common *common = ath5k_hw_common(ah);
1097 struct ath5k_buf *bf;
1100 common->rx_bufsize = roundup(IEEE80211_MAX_FRAME_LEN, common->cachelsz);
1102 ATH5K_DBG(sc, ATH5K_DEBUG_RESET, "cachelsz %u rx_bufsize %u\n",
1103 common->cachelsz, common->rx_bufsize);
1105 spin_lock_bh(&sc->rxbuflock);
1107 list_for_each_entry(bf, &sc->rxbuf, list) {
1108 ret = ath5k_rxbuf_setup(sc, bf);
1110 spin_unlock_bh(&sc->rxbuflock);
1114 bf = list_first_entry(&sc->rxbuf, struct ath5k_buf, list);
1115 ath5k_hw_set_rxdp(ah, bf->daddr);
1116 spin_unlock_bh(&sc->rxbuflock);
1118 ath5k_hw_start_rx_dma(ah); /* enable recv descriptors */
1119 ath5k_update_bssid_mask_and_opmode(sc, NULL); /* set filters, etc. */
1120 ath5k_hw_start_rx_pcu(ah); /* re-enable PCU/DMA engine */
1128 * Disable the receive logic on PCU (DRU)
1129 * In preparation for a shutdown.
1131 * Note: Doesn't stop rx DMA, ath5k_hw_dma_stop
1135 ath5k_rx_stop(struct ath5k_softc *sc)
1137 struct ath5k_hw *ah = sc->ah;
1139 ath5k_hw_set_rx_filter(ah, 0); /* clear recv filter */
1140 ath5k_hw_stop_rx_pcu(ah); /* disable PCU */
1142 ath5k_debug_printrxbuffs(sc, ah);
1146 ath5k_rx_decrypted(struct ath5k_softc *sc, struct sk_buff *skb,
1147 struct ath5k_rx_status *rs)
1149 struct ath5k_hw *ah = sc->ah;
1150 struct ath_common *common = ath5k_hw_common(ah);
1151 struct ieee80211_hdr *hdr = (void *)skb->data;
1152 unsigned int keyix, hlen;
1154 if (!(rs->rs_status & AR5K_RXERR_DECRYPT) &&
1155 rs->rs_keyix != AR5K_RXKEYIX_INVALID)
1156 return RX_FLAG_DECRYPTED;
1158 /* Apparently when a default key is used to decrypt the packet
1159 the hw does not set the index used to decrypt. In such cases
1160 get the index from the packet. */
1161 hlen = ieee80211_hdrlen(hdr->frame_control);
1162 if (ieee80211_has_protected(hdr->frame_control) &&
1163 !(rs->rs_status & AR5K_RXERR_DECRYPT) &&
1164 skb->len >= hlen + 4) {
1165 keyix = skb->data[hlen + 3] >> 6;
1167 if (test_bit(keyix, common->keymap))
1168 return RX_FLAG_DECRYPTED;
1176 ath5k_check_ibss_tsf(struct ath5k_softc *sc, struct sk_buff *skb,
1177 struct ieee80211_rx_status *rxs)
1179 struct ath_common *common = ath5k_hw_common(sc->ah);
1182 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)skb->data;
1184 if (ieee80211_is_beacon(mgmt->frame_control) &&
1185 le16_to_cpu(mgmt->u.beacon.capab_info) & WLAN_CAPABILITY_IBSS &&
1186 memcmp(mgmt->bssid, common->curbssid, ETH_ALEN) == 0) {
1188 * Received an IBSS beacon with the same BSSID. Hardware *must*
1189 * have updated the local TSF. We have to work around various
1190 * hardware bugs, though...
1192 tsf = ath5k_hw_get_tsf64(sc->ah);
1193 bc_tstamp = le64_to_cpu(mgmt->u.beacon.timestamp);
1194 hw_tu = TSF_TO_TU(tsf);
1196 ATH5K_DBG_UNLIMIT(sc, ATH5K_DEBUG_BEACON,
1197 "beacon %llx mactime %llx (diff %lld) tsf now %llx\n",
1198 (unsigned long long)bc_tstamp,
1199 (unsigned long long)rxs->mactime,
1200 (unsigned long long)(rxs->mactime - bc_tstamp),
1201 (unsigned long long)tsf);
1204 * Sometimes the HW will give us a wrong tstamp in the rx
1205 * status, causing the timestamp extension to go wrong.
1206 * (This seems to happen especially with beacon frames bigger
1207 * than 78 byte (incl. FCS))
1208 * But we know that the receive timestamp must be later than the
1209 * timestamp of the beacon since HW must have synced to that.
1211 * NOTE: here we assume mactime to be after the frame was
1212 * received, not like mac80211 which defines it at the start.
1214 if (bc_tstamp > rxs->mactime) {
1215 ATH5K_DBG_UNLIMIT(sc, ATH5K_DEBUG_BEACON,
1216 "fixing mactime from %llx to %llx\n",
1217 (unsigned long long)rxs->mactime,
1218 (unsigned long long)tsf);
1223 * Local TSF might have moved higher than our beacon timers,
1224 * in that case we have to update them to continue sending
1225 * beacons. This also takes care of synchronizing beacon sending
1226 * times with other stations.
1228 if (hw_tu >= sc->nexttbtt)
1229 ath5k_beacon_update_timers(sc, bc_tstamp);
1231 /* Check if the beacon timers are still correct, because a TSF
1232 * update might have created a window between them - for a
1233 * longer description see the comment of this function: */
1234 if (!ath5k_hw_check_beacon_timers(sc->ah, sc->bintval)) {
1235 ath5k_beacon_update_timers(sc, bc_tstamp);
1236 ATH5K_DBG_UNLIMIT(sc, ATH5K_DEBUG_BEACON,
1237 "fixed beacon timers after beacon receive\n");
1243 ath5k_update_beacon_rssi(struct ath5k_softc *sc, struct sk_buff *skb, int rssi)
1245 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)skb->data;
1246 struct ath5k_hw *ah = sc->ah;
1247 struct ath_common *common = ath5k_hw_common(ah);
1249 /* only beacons from our BSSID */
1250 if (!ieee80211_is_beacon(mgmt->frame_control) ||
1251 memcmp(mgmt->bssid, common->curbssid, ETH_ALEN) != 0)
1254 ewma_add(&ah->ah_beacon_rssi_avg, rssi);
1256 /* in IBSS mode we should keep RSSI statistics per neighbour */
1257 /* le16_to_cpu(mgmt->u.beacon.capab_info) & WLAN_CAPABILITY_IBSS */
1261 * Compute padding position. skb must contain an IEEE 802.11 frame
1263 static int ath5k_common_padpos(struct sk_buff *skb)
1265 struct ieee80211_hdr * hdr = (struct ieee80211_hdr *)skb->data;
1266 __le16 frame_control = hdr->frame_control;
1269 if (ieee80211_has_a4(frame_control)) {
1272 if (ieee80211_is_data_qos(frame_control)) {
1273 padpos += IEEE80211_QOS_CTL_LEN;
1280 * This function expects an 802.11 frame and returns the number of
1281 * bytes added, or -1 if we don't have enough header room.
1283 static int ath5k_add_padding(struct sk_buff *skb)
1285 int padpos = ath5k_common_padpos(skb);
1286 int padsize = padpos & 3;
1288 if (padsize && skb->len>padpos) {
1290 if (skb_headroom(skb) < padsize)
1293 skb_push(skb, padsize);
1294 memmove(skb->data, skb->data+padsize, padpos);
1302 * The MAC header is padded to have 32-bit boundary if the
1303 * packet payload is non-zero. The general calculation for
1304 * padsize would take into account odd header lengths:
1305 * padsize = 4 - (hdrlen & 3); however, since only
1306 * even-length headers are used, padding can only be 0 or 2
1307 * bytes and we can optimize this a bit. We must not try to
1308 * remove padding from short control frames that do not have a
1311 * This function expects an 802.11 frame and returns the number of
1314 static int ath5k_remove_padding(struct sk_buff *skb)
1316 int padpos = ath5k_common_padpos(skb);
1317 int padsize = padpos & 3;
1319 if (padsize && skb->len>=padpos+padsize) {
1320 memmove(skb->data + padsize, skb->data, padpos);
1321 skb_pull(skb, padsize);
1329 ath5k_receive_frame(struct ath5k_softc *sc, struct sk_buff *skb,
1330 struct ath5k_rx_status *rs)
1332 struct ieee80211_rx_status *rxs;
1334 ath5k_remove_padding(skb);
1336 rxs = IEEE80211_SKB_RXCB(skb);
1339 if (unlikely(rs->rs_status & AR5K_RXERR_MIC))
1340 rxs->flag |= RX_FLAG_MMIC_ERROR;
1343 * always extend the mac timestamp, since this information is
1344 * also needed for proper IBSS merging.
1346 * XXX: it might be too late to do it here, since rs_tstamp is
1347 * 15bit only. that means TSF extension has to be done within
1348 * 32768usec (about 32ms). it might be necessary to move this to
1349 * the interrupt handler, like it is done in madwifi.
1351 * Unfortunately we don't know when the hardware takes the rx
1352 * timestamp (beginning of phy frame, data frame, end of rx?).
1353 * The only thing we know is that it is hardware specific...
1354 * On AR5213 it seems the rx timestamp is at the end of the
1355 * frame, but i'm not sure.
1357 * NOTE: mac80211 defines mactime at the beginning of the first
1358 * data symbol. Since we don't have any time references it's
1359 * impossible to comply to that. This affects IBSS merge only
1360 * right now, so it's not too bad...
1362 rxs->mactime = ath5k_extend_tsf(sc->ah, rs->rs_tstamp);
1363 rxs->flag |= RX_FLAG_MACTIME_MPDU;
1365 rxs->freq = sc->curchan->center_freq;
1366 rxs->band = sc->curchan->band;
1368 rxs->signal = sc->ah->ah_noise_floor + rs->rs_rssi;
1370 rxs->antenna = rs->rs_antenna;
1372 if (rs->rs_antenna > 0 && rs->rs_antenna < 5)
1373 sc->stats.antenna_rx[rs->rs_antenna]++;
1375 sc->stats.antenna_rx[0]++; /* invalid */
1377 rxs->rate_idx = ath5k_hw_to_driver_rix(sc, rs->rs_rate);
1378 rxs->flag |= ath5k_rx_decrypted(sc, skb, rs);
1380 if (rxs->rate_idx >= 0 && rs->rs_rate ==
1381 sc->sbands[sc->curchan->band].bitrates[rxs->rate_idx].hw_value_short)
1382 rxs->flag |= RX_FLAG_SHORTPRE;
1384 trace_ath5k_rx(sc, skb);
1386 ath5k_update_beacon_rssi(sc, skb, rs->rs_rssi);
1388 /* check beacons in IBSS mode */
1389 if (sc->opmode == NL80211_IFTYPE_ADHOC)
1390 ath5k_check_ibss_tsf(sc, skb, rxs);
1392 ieee80211_rx(sc->hw, skb);
1395 /** ath5k_frame_receive_ok() - Do we want to receive this frame or not?
1397 * Check if we want to further process this frame or not. Also update
1398 * statistics. Return true if we want this frame, false if not.
1401 ath5k_receive_frame_ok(struct ath5k_softc *sc, struct ath5k_rx_status *rs)
1403 sc->stats.rx_all_count++;
1404 sc->stats.rx_bytes_count += rs->rs_datalen;
1406 if (unlikely(rs->rs_status)) {
1407 if (rs->rs_status & AR5K_RXERR_CRC)
1408 sc->stats.rxerr_crc++;
1409 if (rs->rs_status & AR5K_RXERR_FIFO)
1410 sc->stats.rxerr_fifo++;
1411 if (rs->rs_status & AR5K_RXERR_PHY) {
1412 sc->stats.rxerr_phy++;
1413 if (rs->rs_phyerr > 0 && rs->rs_phyerr < 32)
1414 sc->stats.rxerr_phy_code[rs->rs_phyerr]++;
1417 if (rs->rs_status & AR5K_RXERR_DECRYPT) {
1419 * Decrypt error. If the error occurred
1420 * because there was no hardware key, then
1421 * let the frame through so the upper layers
1422 * can process it. This is necessary for 5210
1423 * parts which have no way to setup a ``clear''
1426 * XXX do key cache faulting
1428 sc->stats.rxerr_decrypt++;
1429 if (rs->rs_keyix == AR5K_RXKEYIX_INVALID &&
1430 !(rs->rs_status & AR5K_RXERR_CRC))
1433 if (rs->rs_status & AR5K_RXERR_MIC) {
1434 sc->stats.rxerr_mic++;
1438 /* reject any frames with non-crypto errors */
1439 if (rs->rs_status & ~(AR5K_RXERR_DECRYPT))
1443 if (unlikely(rs->rs_more)) {
1444 sc->stats.rxerr_jumbo++;
1451 ath5k_set_current_imask(struct ath5k_softc *sc)
1453 enum ath5k_int imask = sc->imask;
1454 unsigned long flags;
1456 spin_lock_irqsave(&sc->irqlock, flags);
1458 imask &= ~AR5K_INT_RX_ALL;
1460 imask &= ~AR5K_INT_TX_ALL;
1461 ath5k_hw_set_imr(sc->ah, imask);
1462 spin_unlock_irqrestore(&sc->irqlock, flags);
1466 ath5k_tasklet_rx(unsigned long data)
1468 struct ath5k_rx_status rs = {};
1469 struct sk_buff *skb, *next_skb;
1470 dma_addr_t next_skb_addr;
1471 struct ath5k_softc *sc = (void *)data;
1472 struct ath5k_hw *ah = sc->ah;
1473 struct ath_common *common = ath5k_hw_common(ah);
1474 struct ath5k_buf *bf;
1475 struct ath5k_desc *ds;
1478 spin_lock(&sc->rxbuflock);
1479 if (list_empty(&sc->rxbuf)) {
1480 ATH5K_WARN(sc, "empty rx buf pool\n");
1484 bf = list_first_entry(&sc->rxbuf, struct ath5k_buf, list);
1485 BUG_ON(bf->skb == NULL);
1489 /* bail if HW is still using self-linked descriptor */
1490 if (ath5k_hw_get_rxdp(sc->ah) == bf->daddr)
1493 ret = sc->ah->ah_proc_rx_desc(sc->ah, ds, &rs);
1494 if (unlikely(ret == -EINPROGRESS))
1496 else if (unlikely(ret)) {
1497 ATH5K_ERR(sc, "error in processing rx descriptor\n");
1498 sc->stats.rxerr_proc++;
1502 if (ath5k_receive_frame_ok(sc, &rs)) {
1503 next_skb = ath5k_rx_skb_alloc(sc, &next_skb_addr);
1506 * If we can't replace bf->skb with a new skb under
1507 * memory pressure, just skip this packet
1512 dma_unmap_single(sc->dev, bf->skbaddr,
1516 skb_put(skb, rs.rs_datalen);
1518 ath5k_receive_frame(sc, skb, &rs);
1521 bf->skbaddr = next_skb_addr;
1524 list_move_tail(&bf->list, &sc->rxbuf);
1525 } while (ath5k_rxbuf_setup(sc, bf) == 0);
1527 spin_unlock(&sc->rxbuflock);
1528 sc->rx_pending = false;
1529 ath5k_set_current_imask(sc);
1538 ath5k_tx_queue(struct ieee80211_hw *hw, struct sk_buff *skb,
1539 struct ath5k_txq *txq)
1541 struct ath5k_softc *sc = hw->priv;
1542 struct ath5k_buf *bf;
1543 unsigned long flags;
1546 trace_ath5k_tx(sc, skb, txq);
1549 * The hardware expects the header padded to 4 byte boundaries.
1550 * If this is not the case, we add the padding after the header.
1552 padsize = ath5k_add_padding(skb);
1554 ATH5K_ERR(sc, "tx hdrlen not %%4: not enough"
1555 " headroom to pad");
1559 if (txq->txq_len >= txq->txq_max)
1560 ieee80211_stop_queue(hw, txq->qnum);
1562 spin_lock_irqsave(&sc->txbuflock, flags);
1563 if (list_empty(&sc->txbuf)) {
1564 ATH5K_ERR(sc, "no further txbuf available, dropping packet\n");
1565 spin_unlock_irqrestore(&sc->txbuflock, flags);
1566 ieee80211_stop_queues(hw);
1569 bf = list_first_entry(&sc->txbuf, struct ath5k_buf, list);
1570 list_del(&bf->list);
1572 if (list_empty(&sc->txbuf))
1573 ieee80211_stop_queues(hw);
1574 spin_unlock_irqrestore(&sc->txbuflock, flags);
1578 if (ath5k_txbuf_setup(sc, bf, txq, padsize)) {
1580 spin_lock_irqsave(&sc->txbuflock, flags);
1581 list_add_tail(&bf->list, &sc->txbuf);
1583 spin_unlock_irqrestore(&sc->txbuflock, flags);
1589 dev_kfree_skb_any(skb);
1593 ath5k_tx_frame_completed(struct ath5k_softc *sc, struct sk_buff *skb,
1594 struct ath5k_txq *txq, struct ath5k_tx_status *ts)
1596 struct ieee80211_tx_info *info;
1600 sc->stats.tx_all_count++;
1601 sc->stats.tx_bytes_count += skb->len;
1602 info = IEEE80211_SKB_CB(skb);
1604 tries[0] = info->status.rates[0].count;
1605 tries[1] = info->status.rates[1].count;
1606 tries[2] = info->status.rates[2].count;
1608 ieee80211_tx_info_clear_status(info);
1610 for (i = 0; i < ts->ts_final_idx; i++) {
1611 struct ieee80211_tx_rate *r =
1612 &info->status.rates[i];
1614 r->count = tries[i];
1617 info->status.rates[ts->ts_final_idx].count = ts->ts_final_retry;
1618 info->status.rates[ts->ts_final_idx + 1].idx = -1;
1620 if (unlikely(ts->ts_status)) {
1621 sc->stats.ack_fail++;
1622 if (ts->ts_status & AR5K_TXERR_FILT) {
1623 info->flags |= IEEE80211_TX_STAT_TX_FILTERED;
1624 sc->stats.txerr_filt++;
1626 if (ts->ts_status & AR5K_TXERR_XRETRY)
1627 sc->stats.txerr_retry++;
1628 if (ts->ts_status & AR5K_TXERR_FIFO)
1629 sc->stats.txerr_fifo++;
1631 info->flags |= IEEE80211_TX_STAT_ACK;
1632 info->status.ack_signal = ts->ts_rssi;
1634 /* count the successful attempt as well */
1635 info->status.rates[ts->ts_final_idx].count++;
1639 * Remove MAC header padding before giving the frame
1642 ath5k_remove_padding(skb);
1644 if (ts->ts_antenna > 0 && ts->ts_antenna < 5)
1645 sc->stats.antenna_tx[ts->ts_antenna]++;
1647 sc->stats.antenna_tx[0]++; /* invalid */
1649 trace_ath5k_tx_complete(sc, skb, txq, ts);
1650 ieee80211_tx_status(sc->hw, skb);
1654 ath5k_tx_processq(struct ath5k_softc *sc, struct ath5k_txq *txq)
1656 struct ath5k_tx_status ts = {};
1657 struct ath5k_buf *bf, *bf0;
1658 struct ath5k_desc *ds;
1659 struct sk_buff *skb;
1662 spin_lock(&txq->lock);
1663 list_for_each_entry_safe(bf, bf0, &txq->q, list) {
1665 txq->txq_poll_mark = false;
1667 /* skb might already have been processed last time. */
1668 if (bf->skb != NULL) {
1671 ret = sc->ah->ah_proc_tx_desc(sc->ah, ds, &ts);
1672 if (unlikely(ret == -EINPROGRESS))
1674 else if (unlikely(ret)) {
1676 "error %d while processing "
1677 "queue %u\n", ret, txq->qnum);
1684 dma_unmap_single(sc->dev, bf->skbaddr, skb->len,
1686 ath5k_tx_frame_completed(sc, skb, txq, &ts);
1690 * It's possible that the hardware can say the buffer is
1691 * completed when it hasn't yet loaded the ds_link from
1692 * host memory and moved on.
1693 * Always keep the last descriptor to avoid HW races...
1695 if (ath5k_hw_get_txdp(sc->ah, txq->qnum) != bf->daddr) {
1696 spin_lock(&sc->txbuflock);
1697 list_move_tail(&bf->list, &sc->txbuf);
1700 spin_unlock(&sc->txbuflock);
1703 spin_unlock(&txq->lock);
1704 if (txq->txq_len < ATH5K_TXQ_LEN_LOW && txq->qnum < 4)
1705 ieee80211_wake_queue(sc->hw, txq->qnum);
1709 ath5k_tasklet_tx(unsigned long data)
1712 struct ath5k_softc *sc = (void *)data;
1714 for (i=0; i < AR5K_NUM_TX_QUEUES; i++)
1715 if (sc->txqs[i].setup && (sc->ah->ah_txq_isr & BIT(i)))
1716 ath5k_tx_processq(sc, &sc->txqs[i]);
1718 sc->tx_pending = false;
1719 ath5k_set_current_imask(sc);
1728 * Setup the beacon frame for transmit.
1731 ath5k_beacon_setup(struct ath5k_softc *sc, struct ath5k_buf *bf)
1733 struct sk_buff *skb = bf->skb;
1734 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1735 struct ath5k_hw *ah = sc->ah;
1736 struct ath5k_desc *ds;
1740 const int padsize = 0;
1742 bf->skbaddr = dma_map_single(sc->dev, skb->data, skb->len,
1744 ATH5K_DBG(sc, ATH5K_DEBUG_BEACON, "skb %p [data %p len %u] "
1745 "skbaddr %llx\n", skb, skb->data, skb->len,
1746 (unsigned long long)bf->skbaddr);
1748 if (dma_mapping_error(sc->dev, bf->skbaddr)) {
1749 ATH5K_ERR(sc, "beacon DMA mapping failed\n");
1754 antenna = ah->ah_tx_ant;
1756 flags = AR5K_TXDESC_NOACK;
1757 if (sc->opmode == NL80211_IFTYPE_ADHOC && ath5k_hw_hasveol(ah)) {
1758 ds->ds_link = bf->daddr; /* self-linked */
1759 flags |= AR5K_TXDESC_VEOL;
1764 * If we use multiple antennas on AP and use
1765 * the Sectored AP scenario, switch antenna every
1766 * 4 beacons to make sure everybody hears our AP.
1767 * When a client tries to associate, hw will keep
1768 * track of the tx antenna to be used for this client
1769 * automaticaly, based on ACKed packets.
1771 * Note: AP still listens and transmits RTS on the
1772 * default antenna which is supposed to be an omni.
1774 * Note2: On sectored scenarios it's possible to have
1775 * multiple antennas (1 omni -- the default -- and 14
1776 * sectors), so if we choose to actually support this
1777 * mode, we need to allow the user to set how many antennas
1778 * we have and tweak the code below to send beacons
1781 if (ah->ah_ant_mode == AR5K_ANTMODE_SECTOR_AP)
1782 antenna = sc->bsent & 4 ? 2 : 1;
1785 /* FIXME: If we are in g mode and rate is a CCK rate
1786 * subtract ah->ah_txpower.txp_cck_ofdm_pwr_delta
1787 * from tx power (value is in dB units already) */
1788 ds->ds_data = bf->skbaddr;
1789 ret = ah->ah_setup_tx_desc(ah, ds, skb->len,
1790 ieee80211_get_hdrlen_from_skb(skb), padsize,
1791 AR5K_PKT_TYPE_BEACON, (sc->power_level * 2),
1792 ieee80211_get_tx_rate(sc->hw, info)->hw_value,
1793 1, AR5K_TXKEYIX_INVALID,
1794 antenna, flags, 0, 0);
1800 dma_unmap_single(sc->dev, bf->skbaddr, skb->len, DMA_TO_DEVICE);
1805 * Updates the beacon that is sent by ath5k_beacon_send. For adhoc,
1806 * this is called only once at config_bss time, for AP we do it every
1807 * SWBA interrupt so that the TIM will reflect buffered frames.
1809 * Called with the beacon lock.
1812 ath5k_beacon_update(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
1815 struct ath5k_softc *sc = hw->priv;
1816 struct ath5k_vif *avf = (void *)vif->drv_priv;
1817 struct sk_buff *skb;
1819 if (WARN_ON(!vif)) {
1824 skb = ieee80211_beacon_get(hw, vif);
1831 ath5k_txbuf_free_skb(sc, avf->bbuf);
1832 avf->bbuf->skb = skb;
1833 ret = ath5k_beacon_setup(sc, avf->bbuf);
1835 avf->bbuf->skb = NULL;
1841 * Transmit a beacon frame at SWBA. Dynamic updates to the
1842 * frame contents are done as needed and the slot time is
1843 * also adjusted based on current state.
1845 * This is called from software irq context (beacontq tasklets)
1846 * or user context from ath5k_beacon_config.
1849 ath5k_beacon_send(struct ath5k_softc *sc)
1851 struct ath5k_hw *ah = sc->ah;
1852 struct ieee80211_vif *vif;
1853 struct ath5k_vif *avf;
1854 struct ath5k_buf *bf;
1855 struct sk_buff *skb;
1857 ATH5K_DBG_UNLIMIT(sc, ATH5K_DEBUG_BEACON, "in beacon_send\n");
1860 * Check if the previous beacon has gone out. If
1861 * not, don't don't try to post another: skip this
1862 * period and wait for the next. Missed beacons
1863 * indicate a problem and should not occur. If we
1864 * miss too many consecutive beacons reset the device.
1866 if (unlikely(ath5k_hw_num_tx_pending(ah, sc->bhalq) != 0)) {
1868 ATH5K_DBG(sc, ATH5K_DEBUG_BEACON,
1869 "missed %u consecutive beacons\n", sc->bmisscount);
1870 if (sc->bmisscount > 10) { /* NB: 10 is a guess */
1871 ATH5K_DBG(sc, ATH5K_DEBUG_BEACON,
1872 "stuck beacon time (%u missed)\n",
1874 ATH5K_DBG(sc, ATH5K_DEBUG_RESET,
1875 "stuck beacon, resetting\n");
1876 ieee80211_queue_work(sc->hw, &sc->reset_work);
1880 if (unlikely(sc->bmisscount != 0)) {
1881 ATH5K_DBG(sc, ATH5K_DEBUG_BEACON,
1882 "resume beacon xmit after %u misses\n",
1887 if ((sc->opmode == NL80211_IFTYPE_AP && sc->num_ap_vifs > 1) ||
1888 sc->opmode == NL80211_IFTYPE_MESH_POINT) {
1889 u64 tsf = ath5k_hw_get_tsf64(ah);
1890 u32 tsftu = TSF_TO_TU(tsf);
1891 int slot = ((tsftu % sc->bintval) * ATH_BCBUF) / sc->bintval;
1892 vif = sc->bslot[(slot + 1) % ATH_BCBUF];
1893 ATH5K_DBG(sc, ATH5K_DEBUG_BEACON,
1894 "tsf %llx tsftu %x intval %u slot %u vif %p\n",
1895 (unsigned long long)tsf, tsftu, sc->bintval, slot, vif);
1896 } else /* only one interface */
1902 avf = (void *)vif->drv_priv;
1904 if (unlikely(bf->skb == NULL || sc->opmode == NL80211_IFTYPE_STATION ||
1905 sc->opmode == NL80211_IFTYPE_MONITOR)) {
1906 ATH5K_WARN(sc, "bf=%p bf_skb=%p\n", bf, bf ? bf->skb : NULL);
1911 * Stop any current dma and put the new frame on the queue.
1912 * This should never fail since we check above that no frames
1913 * are still pending on the queue.
1915 if (unlikely(ath5k_hw_stop_beacon_queue(ah, sc->bhalq))) {
1916 ATH5K_WARN(sc, "beacon queue %u didn't start/stop ?\n", sc->bhalq);
1917 /* NB: hw still stops DMA, so proceed */
1920 /* refresh the beacon for AP or MESH mode */
1921 if (sc->opmode == NL80211_IFTYPE_AP ||
1922 sc->opmode == NL80211_IFTYPE_MESH_POINT)
1923 ath5k_beacon_update(sc->hw, vif);
1925 trace_ath5k_tx(sc, bf->skb, &sc->txqs[sc->bhalq]);
1927 ath5k_hw_set_txdp(ah, sc->bhalq, bf->daddr);
1928 ath5k_hw_start_tx_dma(ah, sc->bhalq);
1929 ATH5K_DBG(sc, ATH5K_DEBUG_BEACON, "TXDP[%u] = %llx (%p)\n",
1930 sc->bhalq, (unsigned long long)bf->daddr, bf->desc);
1932 skb = ieee80211_get_buffered_bc(sc->hw, vif);
1934 ath5k_tx_queue(sc->hw, skb, sc->cabq);
1935 skb = ieee80211_get_buffered_bc(sc->hw, vif);
1942 * ath5k_beacon_update_timers - update beacon timers
1944 * @sc: struct ath5k_softc pointer we are operating on
1945 * @bc_tsf: the timestamp of the beacon. 0 to reset the TSF. -1 to perform a
1946 * beacon timer update based on the current HW TSF.
1948 * Calculate the next target beacon transmit time (TBTT) based on the timestamp
1949 * of a received beacon or the current local hardware TSF and write it to the
1950 * beacon timer registers.
1952 * This is called in a variety of situations, e.g. when a beacon is received,
1953 * when a TSF update has been detected, but also when an new IBSS is created or
1954 * when we otherwise know we have to update the timers, but we keep it in this
1955 * function to have it all together in one place.
1958 ath5k_beacon_update_timers(struct ath5k_softc *sc, u64 bc_tsf)
1960 struct ath5k_hw *ah = sc->ah;
1961 u32 nexttbtt, intval, hw_tu, bc_tu;
1964 intval = sc->bintval & AR5K_BEACON_PERIOD;
1965 if (sc->opmode == NL80211_IFTYPE_AP && sc->num_ap_vifs > 1) {
1966 intval /= ATH_BCBUF; /* staggered multi-bss beacons */
1968 ATH5K_WARN(sc, "intval %u is too low, min 15\n",
1971 if (WARN_ON(!intval))
1974 /* beacon TSF converted to TU */
1975 bc_tu = TSF_TO_TU(bc_tsf);
1977 /* current TSF converted to TU */
1978 hw_tsf = ath5k_hw_get_tsf64(ah);
1979 hw_tu = TSF_TO_TU(hw_tsf);
1981 #define FUDGE AR5K_TUNE_SW_BEACON_RESP + 3
1982 /* We use FUDGE to make sure the next TBTT is ahead of the current TU.
1983 * Since we later subtract AR5K_TUNE_SW_BEACON_RESP (10) in the timer
1984 * configuration we need to make sure it is bigger than that. */
1988 * no beacons received, called internally.
1989 * just need to refresh timers based on HW TSF.
1991 nexttbtt = roundup(hw_tu + FUDGE, intval);
1992 } else if (bc_tsf == 0) {
1994 * no beacon received, probably called by ath5k_reset_tsf().
1995 * reset TSF to start with 0.
1998 intval |= AR5K_BEACON_RESET_TSF;
1999 } else if (bc_tsf > hw_tsf) {
2001 * beacon received, SW merge happened but HW TSF not yet updated.
2002 * not possible to reconfigure timers yet, but next time we
2003 * receive a beacon with the same BSSID, the hardware will
2004 * automatically update the TSF and then we need to reconfigure
2007 ATH5K_DBG_UNLIMIT(sc, ATH5K_DEBUG_BEACON,
2008 "need to wait for HW TSF sync\n");
2012 * most important case for beacon synchronization between STA.
2014 * beacon received and HW TSF has been already updated by HW.
2015 * update next TBTT based on the TSF of the beacon, but make
2016 * sure it is ahead of our local TSF timer.
2018 nexttbtt = bc_tu + roundup(hw_tu + FUDGE - bc_tu, intval);
2022 sc->nexttbtt = nexttbtt;
2024 intval |= AR5K_BEACON_ENA;
2025 ath5k_hw_init_beacon(ah, nexttbtt, intval);
2028 * debugging output last in order to preserve the time critical aspect
2032 ATH5K_DBG_UNLIMIT(sc, ATH5K_DEBUG_BEACON,
2033 "reconfigured timers based on HW TSF\n");
2034 else if (bc_tsf == 0)
2035 ATH5K_DBG_UNLIMIT(sc, ATH5K_DEBUG_BEACON,
2036 "reset HW TSF and timers\n");
2038 ATH5K_DBG_UNLIMIT(sc, ATH5K_DEBUG_BEACON,
2039 "updated timers based on beacon TSF\n");
2041 ATH5K_DBG_UNLIMIT(sc, ATH5K_DEBUG_BEACON,
2042 "bc_tsf %llx hw_tsf %llx bc_tu %u hw_tu %u nexttbtt %u\n",
2043 (unsigned long long) bc_tsf,
2044 (unsigned long long) hw_tsf, bc_tu, hw_tu, nexttbtt);
2045 ATH5K_DBG_UNLIMIT(sc, ATH5K_DEBUG_BEACON, "intval %u %s %s\n",
2046 intval & AR5K_BEACON_PERIOD,
2047 intval & AR5K_BEACON_ENA ? "AR5K_BEACON_ENA" : "",
2048 intval & AR5K_BEACON_RESET_TSF ? "AR5K_BEACON_RESET_TSF" : "");
2052 * ath5k_beacon_config - Configure the beacon queues and interrupts
2054 * @sc: struct ath5k_softc pointer we are operating on
2056 * In IBSS mode we use a self-linked tx descriptor if possible. We enable SWBA
2057 * interrupts to detect TSF updates only.
2060 ath5k_beacon_config(struct ath5k_softc *sc)
2062 struct ath5k_hw *ah = sc->ah;
2063 unsigned long flags;
2065 spin_lock_irqsave(&sc->block, flags);
2067 sc->imask &= ~(AR5K_INT_BMISS | AR5K_INT_SWBA);
2069 if (sc->enable_beacon) {
2071 * In IBSS mode we use a self-linked tx descriptor and let the
2072 * hardware send the beacons automatically. We have to load it
2074 * We use the SWBA interrupt only to keep track of the beacon
2075 * timers in order to detect automatic TSF updates.
2077 ath5k_beaconq_config(sc);
2079 sc->imask |= AR5K_INT_SWBA;
2081 if (sc->opmode == NL80211_IFTYPE_ADHOC) {
2082 if (ath5k_hw_hasveol(ah))
2083 ath5k_beacon_send(sc);
2085 ath5k_beacon_update_timers(sc, -1);
2087 ath5k_hw_stop_beacon_queue(sc->ah, sc->bhalq);
2090 ath5k_hw_set_imr(ah, sc->imask);
2092 spin_unlock_irqrestore(&sc->block, flags);
2095 static void ath5k_tasklet_beacon(unsigned long data)
2097 struct ath5k_softc *sc = (struct ath5k_softc *) data;
2100 * Software beacon alert--time to send a beacon.
2102 * In IBSS mode we use this interrupt just to
2103 * keep track of the next TBTT (target beacon
2104 * transmission time) in order to detect wether
2105 * automatic TSF updates happened.
2107 if (sc->opmode == NL80211_IFTYPE_ADHOC) {
2108 /* XXX: only if VEOL suppported */
2109 u64 tsf = ath5k_hw_get_tsf64(sc->ah);
2110 sc->nexttbtt += sc->bintval;
2111 ATH5K_DBG(sc, ATH5K_DEBUG_BEACON,
2112 "SWBA nexttbtt: %x hw_tu: %x "
2116 (unsigned long long) tsf);
2118 spin_lock(&sc->block);
2119 ath5k_beacon_send(sc);
2120 spin_unlock(&sc->block);
2125 /********************\
2126 * Interrupt handling *
2127 \********************/
2130 ath5k_intr_calibration_poll(struct ath5k_hw *ah)
2132 if (time_is_before_eq_jiffies(ah->ah_cal_next_ani) &&
2133 !(ah->ah_cal_mask & AR5K_CALIBRATION_FULL)) {
2134 /* run ANI only when full calibration is not active */
2135 ah->ah_cal_next_ani = jiffies +
2136 msecs_to_jiffies(ATH5K_TUNE_CALIBRATION_INTERVAL_ANI);
2137 tasklet_schedule(&ah->ah_sc->ani_tasklet);
2139 } else if (time_is_before_eq_jiffies(ah->ah_cal_next_full)) {
2140 ah->ah_cal_next_full = jiffies +
2141 msecs_to_jiffies(ATH5K_TUNE_CALIBRATION_INTERVAL_FULL);
2142 tasklet_schedule(&ah->ah_sc->calib);
2144 /* we could use SWI to generate enough interrupts to meet our
2145 * calibration interval requirements, if necessary:
2146 * AR5K_REG_ENABLE_BITS(ah, AR5K_CR, AR5K_CR_SWI); */
2150 ath5k_schedule_rx(struct ath5k_softc *sc)
2152 sc->rx_pending = true;
2153 tasklet_schedule(&sc->rxtq);
2157 ath5k_schedule_tx(struct ath5k_softc *sc)
2159 sc->tx_pending = true;
2160 tasklet_schedule(&sc->txtq);
2164 ath5k_intr(int irq, void *dev_id)
2166 struct ath5k_softc *sc = dev_id;
2167 struct ath5k_hw *ah = sc->ah;
2168 enum ath5k_int status;
2169 unsigned int counter = 1000;
2171 if (unlikely(test_bit(ATH_STAT_INVALID, sc->status) ||
2172 ((ath5k_get_bus_type(ah) != ATH_AHB) &&
2173 !ath5k_hw_is_intr_pending(ah))))
2177 ath5k_hw_get_isr(ah, &status); /* NB: clears IRQ too */
2178 ATH5K_DBG(sc, ATH5K_DEBUG_INTR, "status 0x%x/0x%x\n",
2180 if (unlikely(status & AR5K_INT_FATAL)) {
2182 * Fatal errors are unrecoverable.
2183 * Typically these are caused by DMA errors.
2185 ATH5K_DBG(sc, ATH5K_DEBUG_RESET,
2186 "fatal int, resetting\n");
2187 ieee80211_queue_work(sc->hw, &sc->reset_work);
2188 } else if (unlikely(status & AR5K_INT_RXORN)) {
2190 * Receive buffers are full. Either the bus is busy or
2191 * the CPU is not fast enough to process all received
2193 * Older chipsets need a reset to come out of this
2194 * condition, but we treat it as RX for newer chips.
2195 * We don't know exactly which versions need a reset -
2196 * this guess is copied from the HAL.
2198 sc->stats.rxorn_intr++;
2199 if (ah->ah_mac_srev < AR5K_SREV_AR5212) {
2200 ATH5K_DBG(sc, ATH5K_DEBUG_RESET,
2201 "rx overrun, resetting\n");
2202 ieee80211_queue_work(sc->hw, &sc->reset_work);
2205 ath5k_schedule_rx(sc);
2207 if (status & AR5K_INT_SWBA) {
2208 tasklet_hi_schedule(&sc->beacontq);
2210 if (status & AR5K_INT_RXEOL) {
2212 * NB: the hardware should re-read the link when
2213 * RXE bit is written, but it doesn't work at
2214 * least on older hardware revs.
2216 sc->stats.rxeol_intr++;
2218 if (status & AR5K_INT_TXURN) {
2219 /* bump tx trigger level */
2220 ath5k_hw_update_tx_triglevel(ah, true);
2222 if (status & (AR5K_INT_RXOK | AR5K_INT_RXERR))
2223 ath5k_schedule_rx(sc);
2224 if (status & (AR5K_INT_TXOK | AR5K_INT_TXDESC
2225 | AR5K_INT_TXERR | AR5K_INT_TXEOL))
2226 ath5k_schedule_tx(sc);
2227 if (status & AR5K_INT_BMISS) {
2230 if (status & AR5K_INT_MIB) {
2231 sc->stats.mib_intr++;
2232 ath5k_hw_update_mib_counters(ah);
2233 ath5k_ani_mib_intr(ah);
2235 if (status & AR5K_INT_GPIO)
2236 tasklet_schedule(&sc->rf_kill.toggleq);
2240 if (ath5k_get_bus_type(ah) == ATH_AHB)
2243 } while (ath5k_hw_is_intr_pending(ah) && --counter > 0);
2245 if (sc->rx_pending || sc->tx_pending)
2246 ath5k_set_current_imask(sc);
2248 if (unlikely(!counter))
2249 ATH5K_WARN(sc, "too many interrupts, giving up for now\n");
2251 ath5k_intr_calibration_poll(ah);
2257 * Periodically recalibrate the PHY to account
2258 * for temperature/environment changes.
2261 ath5k_tasklet_calibrate(unsigned long data)
2263 struct ath5k_softc *sc = (void *)data;
2264 struct ath5k_hw *ah = sc->ah;
2266 /* Only full calibration for now */
2267 ah->ah_cal_mask |= AR5K_CALIBRATION_FULL;
2269 ATH5K_DBG(sc, ATH5K_DEBUG_CALIBRATE, "channel %u/%x\n",
2270 ieee80211_frequency_to_channel(sc->curchan->center_freq),
2271 sc->curchan->hw_value);
2273 if (ath5k_hw_gainf_calibrate(ah) == AR5K_RFGAIN_NEED_CHANGE) {
2275 * Rfgain is out of bounds, reset the chip
2276 * to load new gain values.
2278 ATH5K_DBG(sc, ATH5K_DEBUG_RESET, "calibration, resetting\n");
2279 ieee80211_queue_work(sc->hw, &sc->reset_work);
2281 if (ath5k_hw_phy_calibrate(ah, sc->curchan))
2282 ATH5K_ERR(sc, "calibration of channel %u failed\n",
2283 ieee80211_frequency_to_channel(
2284 sc->curchan->center_freq));
2286 /* Noise floor calibration interrupts rx/tx path while I/Q calibration
2288 * TODO: We should stop TX here, so that it doesn't interfere.
2289 * Note that stopping the queues is not enough to stop TX! */
2290 if (time_is_before_eq_jiffies(ah->ah_cal_next_nf)) {
2291 ah->ah_cal_next_nf = jiffies +
2292 msecs_to_jiffies(ATH5K_TUNE_CALIBRATION_INTERVAL_NF);
2293 ath5k_hw_update_noise_floor(ah);
2296 ah->ah_cal_mask &= ~AR5K_CALIBRATION_FULL;
2301 ath5k_tasklet_ani(unsigned long data)
2303 struct ath5k_softc *sc = (void *)data;
2304 struct ath5k_hw *ah = sc->ah;
2306 ah->ah_cal_mask |= AR5K_CALIBRATION_ANI;
2307 ath5k_ani_calibration(ah);
2308 ah->ah_cal_mask &= ~AR5K_CALIBRATION_ANI;
2313 ath5k_tx_complete_poll_work(struct work_struct *work)
2315 struct ath5k_softc *sc = container_of(work, struct ath5k_softc,
2316 tx_complete_work.work);
2317 struct ath5k_txq *txq;
2319 bool needreset = false;
2321 mutex_lock(&sc->lock);
2323 for (i = 0; i < ARRAY_SIZE(sc->txqs); i++) {
2324 if (sc->txqs[i].setup) {
2326 spin_lock_bh(&txq->lock);
2327 if (txq->txq_len > 1) {
2328 if (txq->txq_poll_mark) {
2329 ATH5K_DBG(sc, ATH5K_DEBUG_XMIT,
2330 "TX queue stuck %d\n",
2334 spin_unlock_bh(&txq->lock);
2337 txq->txq_poll_mark = true;
2340 spin_unlock_bh(&txq->lock);
2345 ATH5K_DBG(sc, ATH5K_DEBUG_RESET,
2346 "TX queues stuck, resetting\n");
2347 ath5k_reset(sc, NULL, true);
2350 mutex_unlock(&sc->lock);
2352 ieee80211_queue_delayed_work(sc->hw, &sc->tx_complete_work,
2353 msecs_to_jiffies(ATH5K_TX_COMPLETE_POLL_INT));
2357 /*************************\
2358 * Initialization routines *
2359 \*************************/
2362 ath5k_init_softc(struct ath5k_softc *sc, const struct ath_bus_ops *bus_ops)
2364 struct ieee80211_hw *hw = sc->hw;
2365 struct ath_common *common;
2369 /* Initialize driver private data */
2370 SET_IEEE80211_DEV(hw, sc->dev);
2371 hw->flags = IEEE80211_HW_RX_INCLUDES_FCS |
2372 IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING |
2373 IEEE80211_HW_SIGNAL_DBM |
2374 IEEE80211_HW_REPORTS_TX_ACK_STATUS;
2376 hw->wiphy->interface_modes =
2377 BIT(NL80211_IFTYPE_AP) |
2378 BIT(NL80211_IFTYPE_STATION) |
2379 BIT(NL80211_IFTYPE_ADHOC) |
2380 BIT(NL80211_IFTYPE_MESH_POINT);
2382 /* both antennas can be configured as RX or TX */
2383 hw->wiphy->available_antennas_tx = 0x3;
2384 hw->wiphy->available_antennas_rx = 0x3;
2386 hw->extra_tx_headroom = 2;
2387 hw->channel_change_time = 5000;
2390 * Mark the device as detached to avoid processing
2391 * interrupts until setup is complete.
2393 __set_bit(ATH_STAT_INVALID, sc->status);
2395 sc->opmode = NL80211_IFTYPE_STATION;
2397 mutex_init(&sc->lock);
2398 spin_lock_init(&sc->rxbuflock);
2399 spin_lock_init(&sc->txbuflock);
2400 spin_lock_init(&sc->block);
2401 spin_lock_init(&sc->irqlock);
2403 /* Setup interrupt handler */
2404 ret = request_irq(sc->irq, ath5k_intr, IRQF_SHARED, "ath", sc);
2406 ATH5K_ERR(sc, "request_irq failed\n");
2410 /* If we passed the test, malloc an ath5k_hw struct */
2411 sc->ah = kzalloc(sizeof(struct ath5k_hw), GFP_KERNEL);
2414 ATH5K_ERR(sc, "out of memory\n");
2419 sc->ah->ah_iobase = sc->iobase;
2420 common = ath5k_hw_common(sc->ah);
2421 common->ops = &ath5k_common_ops;
2422 common->bus_ops = bus_ops;
2423 common->ah = sc->ah;
2428 * Cache line size is used to size and align various
2429 * structures used to communicate with the hardware.
2431 ath5k_read_cachesize(common, &csz);
2432 common->cachelsz = csz << 2; /* convert to bytes */
2434 spin_lock_init(&common->cc_lock);
2436 /* Initialize device */
2437 ret = ath5k_hw_init(sc);
2441 /* set up multi-rate retry capabilities */
2442 if (sc->ah->ah_version == AR5K_AR5212) {
2444 hw->max_rate_tries = max(AR5K_INIT_RETRY_SHORT,
2445 AR5K_INIT_RETRY_LONG);
2448 hw->vif_data_size = sizeof(struct ath5k_vif);
2450 /* Finish private driver data initialization */
2451 ret = ath5k_init(hw);
2455 ATH5K_INFO(sc, "Atheros AR%s chip found (MAC: 0x%x, PHY: 0x%x)\n",
2456 ath5k_chip_name(AR5K_VERSION_MAC, sc->ah->ah_mac_srev),
2457 sc->ah->ah_mac_srev,
2458 sc->ah->ah_phy_revision);
2460 if (!sc->ah->ah_single_chip) {
2461 /* Single chip radio (!RF5111) */
2462 if (sc->ah->ah_radio_5ghz_revision &&
2463 !sc->ah->ah_radio_2ghz_revision) {
2464 /* No 5GHz support -> report 2GHz radio */
2465 if (!test_bit(AR5K_MODE_11A,
2466 sc->ah->ah_capabilities.cap_mode)) {
2467 ATH5K_INFO(sc, "RF%s 2GHz radio found (0x%x)\n",
2468 ath5k_chip_name(AR5K_VERSION_RAD,
2469 sc->ah->ah_radio_5ghz_revision),
2470 sc->ah->ah_radio_5ghz_revision);
2471 /* No 2GHz support (5110 and some
2472 * 5Ghz only cards) -> report 5Ghz radio */
2473 } else if (!test_bit(AR5K_MODE_11B,
2474 sc->ah->ah_capabilities.cap_mode)) {
2475 ATH5K_INFO(sc, "RF%s 5GHz radio found (0x%x)\n",
2476 ath5k_chip_name(AR5K_VERSION_RAD,
2477 sc->ah->ah_radio_5ghz_revision),
2478 sc->ah->ah_radio_5ghz_revision);
2479 /* Multiband radio */
2481 ATH5K_INFO(sc, "RF%s multiband radio found"
2483 ath5k_chip_name(AR5K_VERSION_RAD,
2484 sc->ah->ah_radio_5ghz_revision),
2485 sc->ah->ah_radio_5ghz_revision);
2488 /* Multi chip radio (RF5111 - RF2111) ->
2489 * report both 2GHz/5GHz radios */
2490 else if (sc->ah->ah_radio_5ghz_revision &&
2491 sc->ah->ah_radio_2ghz_revision){
2492 ATH5K_INFO(sc, "RF%s 5GHz radio found (0x%x)\n",
2493 ath5k_chip_name(AR5K_VERSION_RAD,
2494 sc->ah->ah_radio_5ghz_revision),
2495 sc->ah->ah_radio_5ghz_revision);
2496 ATH5K_INFO(sc, "RF%s 2GHz radio found (0x%x)\n",
2497 ath5k_chip_name(AR5K_VERSION_RAD,
2498 sc->ah->ah_radio_2ghz_revision),
2499 sc->ah->ah_radio_2ghz_revision);
2503 ath5k_debug_init_device(sc);
2505 /* ready to process interrupts */
2506 __clear_bit(ATH_STAT_INVALID, sc->status);
2510 ath5k_hw_deinit(sc->ah);
2514 free_irq(sc->irq, sc);
2520 ath5k_stop_locked(struct ath5k_softc *sc)
2522 struct ath5k_hw *ah = sc->ah;
2524 ATH5K_DBG(sc, ATH5K_DEBUG_RESET, "invalid %u\n",
2525 test_bit(ATH_STAT_INVALID, sc->status));
2528 * Shutdown the hardware and driver:
2529 * stop output from above
2530 * disable interrupts
2532 * turn off the radio
2533 * clear transmit machinery
2534 * clear receive machinery
2535 * drain and release tx queues
2536 * reclaim beacon resources
2537 * power down hardware
2539 * Note that some of this work is not possible if the
2540 * hardware is gone (invalid).
2542 ieee80211_stop_queues(sc->hw);
2544 if (!test_bit(ATH_STAT_INVALID, sc->status)) {
2546 ath5k_hw_set_imr(ah, 0);
2547 synchronize_irq(sc->irq);
2549 ath5k_hw_dma_stop(ah);
2550 ath5k_drain_tx_buffs(sc);
2551 ath5k_hw_phy_disable(ah);
2558 ath5k_init_hw(struct ath5k_softc *sc)
2560 struct ath5k_hw *ah = sc->ah;
2561 struct ath_common *common = ath5k_hw_common(ah);
2564 mutex_lock(&sc->lock);
2566 ATH5K_DBG(sc, ATH5K_DEBUG_RESET, "mode %d\n", sc->opmode);
2569 * Stop anything previously setup. This is safe
2570 * no matter this is the first time through or not.
2572 ath5k_stop_locked(sc);
2575 * The basic interface to setting the hardware in a good
2576 * state is ``reset''. On return the hardware is known to
2577 * be powered up and with interrupts disabled. This must
2578 * be followed by initialization of the appropriate bits
2579 * and then setup of the interrupt mask.
2581 sc->curchan = sc->hw->conf.channel;
2582 sc->imask = AR5K_INT_RXOK | AR5K_INT_RXERR | AR5K_INT_RXEOL |
2583 AR5K_INT_RXORN | AR5K_INT_TXDESC | AR5K_INT_TXEOL |
2584 AR5K_INT_FATAL | AR5K_INT_GLOBAL | AR5K_INT_MIB;
2586 ret = ath5k_reset(sc, NULL, false);
2590 ath5k_rfkill_hw_start(ah);
2593 * Reset the key cache since some parts do not reset the
2594 * contents on initial power up or resume from suspend.
2596 for (i = 0; i < common->keymax; i++)
2597 ath_hw_keyreset(common, (u16) i);
2599 /* Use higher rates for acks instead of base
2601 ah->ah_ack_bitrate_high = true;
2603 for (i = 0; i < ARRAY_SIZE(sc->bslot); i++)
2604 sc->bslot[i] = NULL;
2609 mutex_unlock(&sc->lock);
2611 ieee80211_queue_delayed_work(sc->hw, &sc->tx_complete_work,
2612 msecs_to_jiffies(ATH5K_TX_COMPLETE_POLL_INT));
2617 static void ath5k_stop_tasklets(struct ath5k_softc *sc)
2619 sc->rx_pending = false;
2620 sc->tx_pending = false;
2621 tasklet_kill(&sc->rxtq);
2622 tasklet_kill(&sc->txtq);
2623 tasklet_kill(&sc->calib);
2624 tasklet_kill(&sc->beacontq);
2625 tasklet_kill(&sc->ani_tasklet);
2629 * Stop the device, grabbing the top-level lock to protect
2630 * against concurrent entry through ath5k_init (which can happen
2631 * if another thread does a system call and the thread doing the
2632 * stop is preempted).
2635 ath5k_stop_hw(struct ath5k_softc *sc)
2639 mutex_lock(&sc->lock);
2640 ret = ath5k_stop_locked(sc);
2641 if (ret == 0 && !test_bit(ATH_STAT_INVALID, sc->status)) {
2643 * Don't set the card in full sleep mode!
2645 * a) When the device is in this state it must be carefully
2646 * woken up or references to registers in the PCI clock
2647 * domain may freeze the bus (and system). This varies
2648 * by chip and is mostly an issue with newer parts
2649 * (madwifi sources mentioned srev >= 0x78) that go to
2650 * sleep more quickly.
2652 * b) On older chips full sleep results a weird behaviour
2653 * during wakeup. I tested various cards with srev < 0x78
2654 * and they don't wake up after module reload, a second
2655 * module reload is needed to bring the card up again.
2657 * Until we figure out what's going on don't enable
2658 * full chip reset on any chip (this is what Legacy HAL
2659 * and Sam's HAL do anyway). Instead Perform a full reset
2660 * on the device (same as initial state after attach) and
2661 * leave it idle (keep MAC/BB on warm reset) */
2662 ret = ath5k_hw_on_hold(sc->ah);
2664 ATH5K_DBG(sc, ATH5K_DEBUG_RESET,
2665 "putting device to sleep\n");
2669 mutex_unlock(&sc->lock);
2671 ath5k_stop_tasklets(sc);
2673 cancel_delayed_work_sync(&sc->tx_complete_work);
2675 ath5k_rfkill_hw_stop(sc->ah);
2681 * Reset the hardware. If chan is not NULL, then also pause rx/tx
2682 * and change to the given channel.
2684 * This should be called with sc->lock.
2687 ath5k_reset(struct ath5k_softc *sc, struct ieee80211_channel *chan,
2690 struct ath5k_hw *ah = sc->ah;
2691 struct ath_common *common = ath5k_hw_common(ah);
2695 ATH5K_DBG(sc, ATH5K_DEBUG_RESET, "resetting\n");
2697 ath5k_hw_set_imr(ah, 0);
2698 synchronize_irq(sc->irq);
2699 ath5k_stop_tasklets(sc);
2701 /* Save ani mode and disable ANI during
2702 * reset. If we don't we might get false
2703 * PHY error interrupts. */
2704 ani_mode = ah->ah_sc->ani_state.ani_mode;
2705 ath5k_ani_init(ah, ATH5K_ANI_MODE_OFF);
2707 /* We are going to empty hw queues
2708 * so we should also free any remaining
2710 ath5k_drain_tx_buffs(sc);
2714 fast = ((chan != NULL) && modparam_fastchanswitch) ? 1 : 0;
2716 ret = ath5k_hw_reset(ah, sc->opmode, sc->curchan, fast,
2719 ATH5K_ERR(sc, "can't reset hardware (%d)\n", ret);
2723 ret = ath5k_rx_start(sc);
2725 ATH5K_ERR(sc, "can't start recv logic\n");
2729 ath5k_ani_init(ah, ani_mode);
2731 ah->ah_cal_next_full = jiffies;
2732 ah->ah_cal_next_ani = jiffies;
2733 ah->ah_cal_next_nf = jiffies;
2734 ewma_init(&ah->ah_beacon_rssi_avg, 1024, 8);
2736 /* clear survey data and cycle counters */
2737 memset(&sc->survey, 0, sizeof(sc->survey));
2738 spin_lock_bh(&common->cc_lock);
2739 ath_hw_cycle_counters_update(common);
2740 memset(&common->cc_survey, 0, sizeof(common->cc_survey));
2741 memset(&common->cc_ani, 0, sizeof(common->cc_ani));
2742 spin_unlock_bh(&common->cc_lock);
2745 * Change channels and update the h/w rate map if we're switching;
2746 * e.g. 11a to 11b/g.
2748 * We may be doing a reset in response to an ioctl that changes the
2749 * channel so update any state that might change as a result.
2753 /* ath5k_chan_change(sc, c); */
2755 ath5k_beacon_config(sc);
2756 /* intrs are enabled by ath5k_beacon_config */
2758 ieee80211_wake_queues(sc->hw);
2765 static void ath5k_reset_work(struct work_struct *work)
2767 struct ath5k_softc *sc = container_of(work, struct ath5k_softc,
2770 mutex_lock(&sc->lock);
2771 ath5k_reset(sc, NULL, true);
2772 mutex_unlock(&sc->lock);
2776 ath5k_init(struct ieee80211_hw *hw)
2779 struct ath5k_softc *sc = hw->priv;
2780 struct ath5k_hw *ah = sc->ah;
2781 struct ath_regulatory *regulatory = ath5k_hw_regulatory(ah);
2782 struct ath5k_txq *txq;
2783 u8 mac[ETH_ALEN] = {};
2788 * Check if the MAC has multi-rate retry support.
2789 * We do this by trying to setup a fake extended
2790 * descriptor. MACs that don't have support will
2791 * return false w/o doing anything. MACs that do
2792 * support it will return true w/o doing anything.
2794 ret = ath5k_hw_setup_mrr_tx_desc(ah, NULL, 0, 0, 0, 0, 0, 0);
2799 __set_bit(ATH_STAT_MRRETRY, sc->status);
2802 * Collect the channel list. The 802.11 layer
2803 * is resposible for filtering this list based
2804 * on settings like the phy mode and regulatory
2805 * domain restrictions.
2807 ret = ath5k_setup_bands(hw);
2809 ATH5K_ERR(sc, "can't get channels\n");
2814 * Allocate tx+rx descriptors and populate the lists.
2816 ret = ath5k_desc_alloc(sc);
2818 ATH5K_ERR(sc, "can't allocate descriptors\n");
2823 * Allocate hardware transmit queues: one queue for
2824 * beacon frames and one data queue for each QoS
2825 * priority. Note that hw functions handle resetting
2826 * these queues at the needed time.
2828 ret = ath5k_beaconq_setup(ah);
2830 ATH5K_ERR(sc, "can't setup a beacon xmit queue\n");
2834 sc->cabq = ath5k_txq_setup(sc, AR5K_TX_QUEUE_CAB, 0);
2835 if (IS_ERR(sc->cabq)) {
2836 ATH5K_ERR(sc, "can't setup cab queue\n");
2837 ret = PTR_ERR(sc->cabq);
2841 /* 5211 and 5212 usually support 10 queues but we better rely on the
2842 * capability information */
2843 if (ah->ah_capabilities.cap_queues.q_tx_num >= 6) {
2844 /* This order matches mac80211's queue priority, so we can
2845 * directly use the mac80211 queue number without any mapping */
2846 txq = ath5k_txq_setup(sc, AR5K_TX_QUEUE_DATA, AR5K_WME_AC_VO);
2848 ATH5K_ERR(sc, "can't setup xmit queue\n");
2852 txq = ath5k_txq_setup(sc, AR5K_TX_QUEUE_DATA, AR5K_WME_AC_VI);
2854 ATH5K_ERR(sc, "can't setup xmit queue\n");
2858 txq = ath5k_txq_setup(sc, AR5K_TX_QUEUE_DATA, AR5K_WME_AC_BE);
2860 ATH5K_ERR(sc, "can't setup xmit queue\n");
2864 txq = ath5k_txq_setup(sc, AR5K_TX_QUEUE_DATA, AR5K_WME_AC_BK);
2866 ATH5K_ERR(sc, "can't setup xmit queue\n");
2872 /* older hardware (5210) can only support one data queue */
2873 txq = ath5k_txq_setup(sc, AR5K_TX_QUEUE_DATA, AR5K_WME_AC_BE);
2875 ATH5K_ERR(sc, "can't setup xmit queue\n");
2882 tasklet_init(&sc->rxtq, ath5k_tasklet_rx, (unsigned long)sc);
2883 tasklet_init(&sc->txtq, ath5k_tasklet_tx, (unsigned long)sc);
2884 tasklet_init(&sc->calib, ath5k_tasklet_calibrate, (unsigned long)sc);
2885 tasklet_init(&sc->beacontq, ath5k_tasklet_beacon, (unsigned long)sc);
2886 tasklet_init(&sc->ani_tasklet, ath5k_tasklet_ani, (unsigned long)sc);
2888 INIT_WORK(&sc->reset_work, ath5k_reset_work);
2889 INIT_DELAYED_WORK(&sc->tx_complete_work, ath5k_tx_complete_poll_work);
2891 ret = ath5k_hw_common(ah)->bus_ops->eeprom_read_mac(ah, mac);
2893 ATH5K_ERR(sc, "unable to read address from EEPROM\n");
2897 SET_IEEE80211_PERM_ADDR(hw, mac);
2898 memcpy(&sc->lladdr, mac, ETH_ALEN);
2899 /* All MAC address bits matter for ACKs */
2900 ath5k_update_bssid_mask_and_opmode(sc, NULL);
2902 regulatory->current_rd = ah->ah_capabilities.cap_eeprom.ee_regdomain;
2903 ret = ath_regd_init(regulatory, hw->wiphy, ath5k_reg_notifier);
2905 ATH5K_ERR(sc, "can't initialize regulatory system\n");
2909 ret = ieee80211_register_hw(hw);
2911 ATH5K_ERR(sc, "can't register ieee80211 hw\n");
2915 if (!ath_is_world_regd(regulatory))
2916 regulatory_hint(hw->wiphy, regulatory->alpha2);
2918 ath5k_init_leds(sc);
2920 ath5k_sysfs_register(sc);
2924 ath5k_txq_release(sc);
2926 ath5k_hw_release_tx_queue(ah, sc->bhalq);
2928 ath5k_desc_free(sc);
2934 ath5k_deinit_softc(struct ath5k_softc *sc)
2936 struct ieee80211_hw *hw = sc->hw;
2939 * NB: the order of these is important:
2940 * o call the 802.11 layer before detaching ath5k_hw to
2941 * ensure callbacks into the driver to delete global
2942 * key cache entries can be handled
2943 * o reclaim the tx queue data structures after calling
2944 * the 802.11 layer as we'll get called back to reclaim
2945 * node state and potentially want to use them
2946 * o to cleanup the tx queues the hal is called, so detach
2948 * XXX: ??? detach ath5k_hw ???
2949 * Other than that, it's straightforward...
2951 ieee80211_unregister_hw(hw);
2952 ath5k_desc_free(sc);
2953 ath5k_txq_release(sc);
2954 ath5k_hw_release_tx_queue(sc->ah, sc->bhalq);
2955 ath5k_unregister_leds(sc);
2957 ath5k_sysfs_unregister(sc);
2959 * NB: can't reclaim these until after ieee80211_ifdetach
2960 * returns because we'll get called back to reclaim node
2961 * state and potentially want to use them.
2963 ath5k_hw_deinit(sc->ah);
2965 free_irq(sc->irq, sc);
2969 ath5k_any_vif_assoc(struct ath5k_softc *sc)
2971 struct ath5k_vif_iter_data iter_data;
2972 iter_data.hw_macaddr = NULL;
2973 iter_data.any_assoc = false;
2974 iter_data.need_set_hw_addr = false;
2975 iter_data.found_active = true;
2977 ieee80211_iterate_active_interfaces_atomic(sc->hw, ath5k_vif_iter,
2979 return iter_data.any_assoc;
2983 ath5k_set_beacon_filter(struct ieee80211_hw *hw, bool enable)
2985 struct ath5k_softc *sc = hw->priv;
2986 struct ath5k_hw *ah = sc->ah;
2988 rfilt = ath5k_hw_get_rx_filter(ah);
2990 rfilt |= AR5K_RX_FILTER_BEACON;
2992 rfilt &= ~AR5K_RX_FILTER_BEACON;
2993 ath5k_hw_set_rx_filter(ah, rfilt);
2994 sc->filter_flags = rfilt;