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/pci.h>
51 #include <linux/pci-aspm.h>
52 #include <linux/ethtool.h>
53 #include <linux/uaccess.h>
54 #include <linux/slab.h>
56 #include <net/ieee80211_radiotap.h>
58 #include <asm/unaligned.h>
65 static int modparam_nohwcrypt;
66 module_param_named(nohwcrypt, modparam_nohwcrypt, bool, S_IRUGO);
67 MODULE_PARM_DESC(nohwcrypt, "Disable hardware encryption.");
69 static int modparam_all_channels;
70 module_param_named(all_channels, modparam_all_channels, bool, S_IRUGO);
71 MODULE_PARM_DESC(all_channels, "Expose all channels the device can use.");
74 MODULE_AUTHOR("Jiri Slaby");
75 MODULE_AUTHOR("Nick Kossifidis");
76 MODULE_DESCRIPTION("Support for 5xxx series of Atheros 802.11 wireless LAN cards.");
77 MODULE_SUPPORTED_DEVICE("Atheros 5xxx WLAN cards");
78 MODULE_LICENSE("Dual BSD/GPL");
79 MODULE_VERSION("0.6.0 (EXPERIMENTAL)");
81 static int ath5k_reset(struct ath5k_softc *sc, struct ieee80211_channel *chan);
82 static int ath5k_beacon_update(struct ieee80211_hw *hw,
83 struct ieee80211_vif *vif);
84 static void ath5k_beacon_update_timers(struct ath5k_softc *sc, u64 bc_tsf);
87 static DEFINE_PCI_DEVICE_TABLE(ath5k_pci_id_table) = {
88 { PCI_VDEVICE(ATHEROS, 0x0207) }, /* 5210 early */
89 { PCI_VDEVICE(ATHEROS, 0x0007) }, /* 5210 */
90 { PCI_VDEVICE(ATHEROS, 0x0011) }, /* 5311 - this is on AHB bus !*/
91 { PCI_VDEVICE(ATHEROS, 0x0012) }, /* 5211 */
92 { PCI_VDEVICE(ATHEROS, 0x0013) }, /* 5212 */
93 { PCI_VDEVICE(3COM_2, 0x0013) }, /* 3com 5212 */
94 { PCI_VDEVICE(3COM, 0x0013) }, /* 3com 3CRDAG675 5212 */
95 { PCI_VDEVICE(ATHEROS, 0x1014) }, /* IBM minipci 5212 */
96 { PCI_VDEVICE(ATHEROS, 0x0014) }, /* 5212 combatible */
97 { PCI_VDEVICE(ATHEROS, 0x0015) }, /* 5212 combatible */
98 { PCI_VDEVICE(ATHEROS, 0x0016) }, /* 5212 combatible */
99 { PCI_VDEVICE(ATHEROS, 0x0017) }, /* 5212 combatible */
100 { PCI_VDEVICE(ATHEROS, 0x0018) }, /* 5212 combatible */
101 { PCI_VDEVICE(ATHEROS, 0x0019) }, /* 5212 combatible */
102 { PCI_VDEVICE(ATHEROS, 0x001a) }, /* 2413 Griffin-lite */
103 { PCI_VDEVICE(ATHEROS, 0x001b) }, /* 5413 Eagle */
104 { PCI_VDEVICE(ATHEROS, 0x001c) }, /* PCI-E cards */
105 { PCI_VDEVICE(ATHEROS, 0x001d) }, /* 2417 Nala */
108 MODULE_DEVICE_TABLE(pci, ath5k_pci_id_table);
111 static const struct ath5k_srev_name srev_names[] = {
112 { "5210", AR5K_VERSION_MAC, AR5K_SREV_AR5210 },
113 { "5311", AR5K_VERSION_MAC, AR5K_SREV_AR5311 },
114 { "5311A", AR5K_VERSION_MAC, AR5K_SREV_AR5311A },
115 { "5311B", AR5K_VERSION_MAC, AR5K_SREV_AR5311B },
116 { "5211", AR5K_VERSION_MAC, AR5K_SREV_AR5211 },
117 { "5212", AR5K_VERSION_MAC, AR5K_SREV_AR5212 },
118 { "5213", AR5K_VERSION_MAC, AR5K_SREV_AR5213 },
119 { "5213A", AR5K_VERSION_MAC, AR5K_SREV_AR5213A },
120 { "2413", AR5K_VERSION_MAC, AR5K_SREV_AR2413 },
121 { "2414", AR5K_VERSION_MAC, AR5K_SREV_AR2414 },
122 { "5424", AR5K_VERSION_MAC, AR5K_SREV_AR5424 },
123 { "5413", AR5K_VERSION_MAC, AR5K_SREV_AR5413 },
124 { "5414", AR5K_VERSION_MAC, AR5K_SREV_AR5414 },
125 { "2415", AR5K_VERSION_MAC, AR5K_SREV_AR2415 },
126 { "5416", AR5K_VERSION_MAC, AR5K_SREV_AR5416 },
127 { "5418", AR5K_VERSION_MAC, AR5K_SREV_AR5418 },
128 { "2425", AR5K_VERSION_MAC, AR5K_SREV_AR2425 },
129 { "2417", AR5K_VERSION_MAC, AR5K_SREV_AR2417 },
130 { "xxxxx", AR5K_VERSION_MAC, AR5K_SREV_UNKNOWN },
131 { "5110", AR5K_VERSION_RAD, AR5K_SREV_RAD_5110 },
132 { "5111", AR5K_VERSION_RAD, AR5K_SREV_RAD_5111 },
133 { "5111A", AR5K_VERSION_RAD, AR5K_SREV_RAD_5111A },
134 { "2111", AR5K_VERSION_RAD, AR5K_SREV_RAD_2111 },
135 { "5112", AR5K_VERSION_RAD, AR5K_SREV_RAD_5112 },
136 { "5112A", AR5K_VERSION_RAD, AR5K_SREV_RAD_5112A },
137 { "5112B", AR5K_VERSION_RAD, AR5K_SREV_RAD_5112B },
138 { "2112", AR5K_VERSION_RAD, AR5K_SREV_RAD_2112 },
139 { "2112A", AR5K_VERSION_RAD, AR5K_SREV_RAD_2112A },
140 { "2112B", AR5K_VERSION_RAD, AR5K_SREV_RAD_2112B },
141 { "2413", AR5K_VERSION_RAD, AR5K_SREV_RAD_2413 },
142 { "5413", AR5K_VERSION_RAD, AR5K_SREV_RAD_5413 },
143 { "2316", AR5K_VERSION_RAD, AR5K_SREV_RAD_2316 },
144 { "2317", AR5K_VERSION_RAD, AR5K_SREV_RAD_2317 },
145 { "5424", AR5K_VERSION_RAD, AR5K_SREV_RAD_5424 },
146 { "5133", AR5K_VERSION_RAD, AR5K_SREV_RAD_5133 },
147 { "xxxxx", AR5K_VERSION_RAD, AR5K_SREV_UNKNOWN },
150 static const struct ieee80211_rate ath5k_rates[] = {
152 .hw_value = ATH5K_RATE_CODE_1M, },
154 .hw_value = ATH5K_RATE_CODE_2M,
155 .hw_value_short = ATH5K_RATE_CODE_2M | AR5K_SET_SHORT_PREAMBLE,
156 .flags = IEEE80211_RATE_SHORT_PREAMBLE },
158 .hw_value = ATH5K_RATE_CODE_5_5M,
159 .hw_value_short = ATH5K_RATE_CODE_5_5M | AR5K_SET_SHORT_PREAMBLE,
160 .flags = IEEE80211_RATE_SHORT_PREAMBLE },
162 .hw_value = ATH5K_RATE_CODE_11M,
163 .hw_value_short = ATH5K_RATE_CODE_11M | AR5K_SET_SHORT_PREAMBLE,
164 .flags = IEEE80211_RATE_SHORT_PREAMBLE },
166 .hw_value = ATH5K_RATE_CODE_6M,
169 .hw_value = ATH5K_RATE_CODE_9M,
172 .hw_value = ATH5K_RATE_CODE_12M,
175 .hw_value = ATH5K_RATE_CODE_18M,
178 .hw_value = ATH5K_RATE_CODE_24M,
181 .hw_value = ATH5K_RATE_CODE_36M,
184 .hw_value = ATH5K_RATE_CODE_48M,
187 .hw_value = ATH5K_RATE_CODE_54M,
192 static inline void ath5k_txbuf_free_skb(struct ath5k_softc *sc,
193 struct ath5k_buf *bf)
198 pci_unmap_single(sc->pdev, bf->skbaddr, bf->skb->len,
200 dev_kfree_skb_any(bf->skb);
203 bf->desc->ds_data = 0;
206 static inline void ath5k_rxbuf_free_skb(struct ath5k_softc *sc,
207 struct ath5k_buf *bf)
209 struct ath5k_hw *ah = sc->ah;
210 struct ath_common *common = ath5k_hw_common(ah);
215 pci_unmap_single(sc->pdev, bf->skbaddr, common->rx_bufsize,
217 dev_kfree_skb_any(bf->skb);
220 bf->desc->ds_data = 0;
224 static inline u64 ath5k_extend_tsf(struct ath5k_hw *ah, u32 rstamp)
226 u64 tsf = ath5k_hw_get_tsf64(ah);
228 if ((tsf & 0x7fff) < rstamp)
231 return (tsf & ~0x7fff) | rstamp;
235 ath5k_chip_name(enum ath5k_srev_type type, u_int16_t val)
237 const char *name = "xxxxx";
240 for (i = 0; i < ARRAY_SIZE(srev_names); i++) {
241 if (srev_names[i].sr_type != type)
244 if ((val & 0xf0) == srev_names[i].sr_val)
245 name = srev_names[i].sr_name;
247 if ((val & 0xff) == srev_names[i].sr_val) {
248 name = srev_names[i].sr_name;
255 static unsigned int ath5k_ioread32(void *hw_priv, u32 reg_offset)
257 struct ath5k_hw *ah = (struct ath5k_hw *) hw_priv;
258 return ath5k_hw_reg_read(ah, reg_offset);
261 static void ath5k_iowrite32(void *hw_priv, u32 val, u32 reg_offset)
263 struct ath5k_hw *ah = (struct ath5k_hw *) hw_priv;
264 ath5k_hw_reg_write(ah, val, reg_offset);
267 static const struct ath_ops ath5k_common_ops = {
268 .read = ath5k_ioread32,
269 .write = ath5k_iowrite32,
272 /***********************\
273 * Driver Initialization *
274 \***********************/
276 static int ath5k_reg_notifier(struct wiphy *wiphy, struct regulatory_request *request)
278 struct ieee80211_hw *hw = wiphy_to_ieee80211_hw(wiphy);
279 struct ath5k_softc *sc = hw->priv;
280 struct ath_regulatory *regulatory = ath5k_hw_regulatory(sc->ah);
282 return ath_reg_notifier_apply(wiphy, request, regulatory);
285 /********************\
286 * Channel/mode setup *
287 \********************/
290 * Convert IEEE channel number to MHz frequency.
293 ath5k_ieee2mhz(short chan)
295 if (chan <= 14 || chan >= 27)
296 return ieee80211chan2mhz(chan);
298 return 2212 + chan * 20;
302 * Returns true for the channel numbers used without all_channels modparam.
304 static bool ath5k_is_standard_channel(short chan)
306 return ((chan <= 14) ||
308 ((chan & 3) == 0 && chan >= 36 && chan <= 64) ||
310 ((chan & 3) == 0 && chan >= 100 && chan <= 140) ||
312 ((chan & 3) == 1 && chan >= 149 && chan <= 165));
316 ath5k_copy_channels(struct ath5k_hw *ah,
317 struct ieee80211_channel *channels,
321 unsigned int i, count, size, chfreq, freq, ch;
323 if (!test_bit(mode, ah->ah_modes))
328 case AR5K_MODE_11A_TURBO:
329 /* 1..220, but 2GHz frequencies are filtered by check_channel */
331 chfreq = CHANNEL_5GHZ;
335 case AR5K_MODE_11G_TURBO:
337 chfreq = CHANNEL_2GHZ;
340 ATH5K_WARN(ah->ah_sc, "bad mode, not copying channels\n");
344 for (i = 0, count = 0; i < size && max > 0; i++) {
346 freq = ath5k_ieee2mhz(ch);
348 /* Check if channel is supported by the chipset */
349 if (!ath5k_channel_ok(ah, freq, chfreq))
352 if (!modparam_all_channels && !ath5k_is_standard_channel(ch))
355 /* Write channel info and increment counter */
356 channels[count].center_freq = freq;
357 channels[count].band = (chfreq == CHANNEL_2GHZ) ?
358 IEEE80211_BAND_2GHZ : IEEE80211_BAND_5GHZ;
362 channels[count].hw_value = chfreq | CHANNEL_OFDM;
364 case AR5K_MODE_11A_TURBO:
365 case AR5K_MODE_11G_TURBO:
366 channels[count].hw_value = chfreq |
367 CHANNEL_OFDM | CHANNEL_TURBO;
370 channels[count].hw_value = CHANNEL_B;
381 ath5k_setup_rate_idx(struct ath5k_softc *sc, struct ieee80211_supported_band *b)
385 for (i = 0; i < AR5K_MAX_RATES; i++)
386 sc->rate_idx[b->band][i] = -1;
388 for (i = 0; i < b->n_bitrates; i++) {
389 sc->rate_idx[b->band][b->bitrates[i].hw_value] = i;
390 if (b->bitrates[i].hw_value_short)
391 sc->rate_idx[b->band][b->bitrates[i].hw_value_short] = i;
396 ath5k_setup_bands(struct ieee80211_hw *hw)
398 struct ath5k_softc *sc = hw->priv;
399 struct ath5k_hw *ah = sc->ah;
400 struct ieee80211_supported_band *sband;
401 int max_c, count_c = 0;
404 BUILD_BUG_ON(ARRAY_SIZE(sc->sbands) < IEEE80211_NUM_BANDS);
405 max_c = ARRAY_SIZE(sc->channels);
408 sband = &sc->sbands[IEEE80211_BAND_2GHZ];
409 sband->band = IEEE80211_BAND_2GHZ;
410 sband->bitrates = &sc->rates[IEEE80211_BAND_2GHZ][0];
412 if (test_bit(AR5K_MODE_11G, sc->ah->ah_capabilities.cap_mode)) {
414 memcpy(sband->bitrates, &ath5k_rates[0],
415 sizeof(struct ieee80211_rate) * 12);
416 sband->n_bitrates = 12;
418 sband->channels = sc->channels;
419 sband->n_channels = ath5k_copy_channels(ah, sband->channels,
420 AR5K_MODE_11G, max_c);
422 hw->wiphy->bands[IEEE80211_BAND_2GHZ] = sband;
423 count_c = sband->n_channels;
425 } else if (test_bit(AR5K_MODE_11B, sc->ah->ah_capabilities.cap_mode)) {
427 memcpy(sband->bitrates, &ath5k_rates[0],
428 sizeof(struct ieee80211_rate) * 4);
429 sband->n_bitrates = 4;
431 /* 5211 only supports B rates and uses 4bit rate codes
432 * (e.g normally we have 0x1B for 1M, but on 5211 we have 0x0B)
435 if (ah->ah_version == AR5K_AR5211) {
436 for (i = 0; i < 4; i++) {
437 sband->bitrates[i].hw_value =
438 sband->bitrates[i].hw_value & 0xF;
439 sband->bitrates[i].hw_value_short =
440 sband->bitrates[i].hw_value_short & 0xF;
444 sband->channels = sc->channels;
445 sband->n_channels = ath5k_copy_channels(ah, sband->channels,
446 AR5K_MODE_11B, max_c);
448 hw->wiphy->bands[IEEE80211_BAND_2GHZ] = sband;
449 count_c = sband->n_channels;
452 ath5k_setup_rate_idx(sc, sband);
454 /* 5GHz band, A mode */
455 if (test_bit(AR5K_MODE_11A, sc->ah->ah_capabilities.cap_mode)) {
456 sband = &sc->sbands[IEEE80211_BAND_5GHZ];
457 sband->band = IEEE80211_BAND_5GHZ;
458 sband->bitrates = &sc->rates[IEEE80211_BAND_5GHZ][0];
460 memcpy(sband->bitrates, &ath5k_rates[4],
461 sizeof(struct ieee80211_rate) * 8);
462 sband->n_bitrates = 8;
464 sband->channels = &sc->channels[count_c];
465 sband->n_channels = ath5k_copy_channels(ah, sband->channels,
466 AR5K_MODE_11A, max_c);
468 hw->wiphy->bands[IEEE80211_BAND_5GHZ] = sband;
470 ath5k_setup_rate_idx(sc, sband);
472 ath5k_debug_dump_bands(sc);
478 * Set/change channels. We always reset the chip.
479 * To accomplish this we must first cleanup any pending DMA,
480 * then restart stuff after a la ath5k_init.
482 * Called with sc->lock.
485 ath5k_chan_set(struct ath5k_softc *sc, struct ieee80211_channel *chan)
487 ATH5K_DBG(sc, ATH5K_DEBUG_RESET,
488 "channel set, resetting (%u -> %u MHz)\n",
489 sc->curchan->center_freq, chan->center_freq);
492 * To switch channels clear any pending DMA operations;
493 * wait long enough for the RX fifo to drain, reset the
494 * hardware at the new frequency, and then re-enable
495 * the relevant bits of the h/w.
497 return ath5k_reset(sc, chan);
501 ath5k_setcurmode(struct ath5k_softc *sc, unsigned int mode)
505 if (mode == AR5K_MODE_11A) {
506 sc->curband = &sc->sbands[IEEE80211_BAND_5GHZ];
508 sc->curband = &sc->sbands[IEEE80211_BAND_2GHZ];
513 ath5k_mode_setup(struct ath5k_softc *sc)
515 struct ath5k_hw *ah = sc->ah;
518 /* configure rx filter */
519 rfilt = sc->filter_flags;
520 ath5k_hw_set_rx_filter(ah, rfilt);
522 if (ath5k_hw_hasbssidmask(ah))
523 ath5k_hw_set_bssid_mask(ah, sc->bssidmask);
525 /* configure operational mode */
526 ath5k_hw_set_opmode(ah, sc->opmode);
528 ATH5K_DBG(sc, ATH5K_DEBUG_MODE, "mode setup opmode %d\n", sc->opmode);
529 ATH5K_DBG(sc, ATH5K_DEBUG_MODE, "RX filter 0x%x\n", rfilt);
533 ath5k_hw_to_driver_rix(struct ath5k_softc *sc, int hw_rix)
537 /* return base rate on errors */
538 if (WARN(hw_rix < 0 || hw_rix >= AR5K_MAX_RATES,
539 "hw_rix out of bounds: %x\n", hw_rix))
542 rix = sc->rate_idx[sc->curband->band][hw_rix];
543 if (WARN(rix < 0, "invalid hw_rix: %x\n", hw_rix))
554 struct sk_buff *ath5k_rx_skb_alloc(struct ath5k_softc *sc, dma_addr_t *skb_addr)
556 struct ath_common *common = ath5k_hw_common(sc->ah);
560 * Allocate buffer with headroom_needed space for the
561 * fake physical layer header at the start.
563 skb = ath_rxbuf_alloc(common,
568 ATH5K_ERR(sc, "can't alloc skbuff of size %u\n",
573 *skb_addr = pci_map_single(sc->pdev,
574 skb->data, common->rx_bufsize,
576 if (unlikely(pci_dma_mapping_error(sc->pdev, *skb_addr))) {
577 ATH5K_ERR(sc, "%s: DMA mapping failed\n", __func__);
585 ath5k_rxbuf_setup(struct ath5k_softc *sc, struct ath5k_buf *bf)
587 struct ath5k_hw *ah = sc->ah;
588 struct sk_buff *skb = bf->skb;
589 struct ath5k_desc *ds;
593 skb = ath5k_rx_skb_alloc(sc, &bf->skbaddr);
600 * Setup descriptors. For receive we always terminate
601 * the descriptor list with a self-linked entry so we'll
602 * not get overrun under high load (as can happen with a
603 * 5212 when ANI processing enables PHY error frames).
605 * To ensure the last descriptor is self-linked we create
606 * each descriptor as self-linked and add it to the end. As
607 * each additional descriptor is added the previous self-linked
608 * entry is "fixed" naturally. This should be safe even
609 * if DMA is happening. When processing RX interrupts we
610 * never remove/process the last, self-linked, entry on the
611 * descriptor list. This ensures the hardware always has
612 * someplace to write a new frame.
615 ds->ds_link = bf->daddr; /* link to self */
616 ds->ds_data = bf->skbaddr;
617 ret = ath5k_hw_setup_rx_desc(ah, ds, ah->common.rx_bufsize, 0);
619 ATH5K_ERR(sc, "%s: could not setup RX desc\n", __func__);
623 if (sc->rxlink != NULL)
624 *sc->rxlink = bf->daddr;
625 sc->rxlink = &ds->ds_link;
629 static enum ath5k_pkt_type get_hw_packet_type(struct sk_buff *skb)
631 struct ieee80211_hdr *hdr;
632 enum ath5k_pkt_type htype;
635 hdr = (struct ieee80211_hdr *)skb->data;
636 fc = hdr->frame_control;
638 if (ieee80211_is_beacon(fc))
639 htype = AR5K_PKT_TYPE_BEACON;
640 else if (ieee80211_is_probe_resp(fc))
641 htype = AR5K_PKT_TYPE_PROBE_RESP;
642 else if (ieee80211_is_atim(fc))
643 htype = AR5K_PKT_TYPE_ATIM;
644 else if (ieee80211_is_pspoll(fc))
645 htype = AR5K_PKT_TYPE_PSPOLL;
647 htype = AR5K_PKT_TYPE_NORMAL;
653 ath5k_txbuf_setup(struct ath5k_softc *sc, struct ath5k_buf *bf,
654 struct ath5k_txq *txq, int padsize)
656 struct ath5k_hw *ah = sc->ah;
657 struct ath5k_desc *ds = bf->desc;
658 struct sk_buff *skb = bf->skb;
659 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
660 unsigned int pktlen, flags, keyidx = AR5K_TXKEYIX_INVALID;
661 struct ieee80211_rate *rate;
662 unsigned int mrr_rate[3], mrr_tries[3];
669 flags = AR5K_TXDESC_INTREQ | AR5K_TXDESC_CLRDMASK;
672 bf->skbaddr = pci_map_single(sc->pdev, skb->data, skb->len,
675 rate = ieee80211_get_tx_rate(sc->hw, info);
681 if (info->flags & IEEE80211_TX_CTL_NO_ACK)
682 flags |= AR5K_TXDESC_NOACK;
684 rc_flags = info->control.rates[0].flags;
685 hw_rate = (rc_flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE) ?
686 rate->hw_value_short : rate->hw_value;
690 /* FIXME: If we are in g mode and rate is a CCK rate
691 * subtract ah->ah_txpower.txp_cck_ofdm_pwr_delta
692 * from tx power (value is in dB units already) */
693 if (info->control.hw_key) {
694 keyidx = info->control.hw_key->hw_key_idx;
695 pktlen += info->control.hw_key->icv_len;
697 if (rc_flags & IEEE80211_TX_RC_USE_RTS_CTS) {
698 flags |= AR5K_TXDESC_RTSENA;
699 cts_rate = ieee80211_get_rts_cts_rate(sc->hw, info)->hw_value;
700 duration = le16_to_cpu(ieee80211_rts_duration(sc->hw,
701 sc->vif, pktlen, info));
703 if (rc_flags & IEEE80211_TX_RC_USE_CTS_PROTECT) {
704 flags |= AR5K_TXDESC_CTSENA;
705 cts_rate = ieee80211_get_rts_cts_rate(sc->hw, info)->hw_value;
706 duration = le16_to_cpu(ieee80211_ctstoself_duration(sc->hw,
707 sc->vif, pktlen, info));
709 ret = ah->ah_setup_tx_desc(ah, ds, pktlen,
710 ieee80211_get_hdrlen_from_skb(skb), padsize,
711 get_hw_packet_type(skb),
712 (sc->power_level * 2),
714 info->control.rates[0].count, keyidx, ah->ah_tx_ant, flags,
719 memset(mrr_rate, 0, sizeof(mrr_rate));
720 memset(mrr_tries, 0, sizeof(mrr_tries));
721 for (i = 0; i < 3; i++) {
722 rate = ieee80211_get_alt_retry_rate(sc->hw, info, i);
726 mrr_rate[i] = rate->hw_value;
727 mrr_tries[i] = info->control.rates[i + 1].count;
730 ath5k_hw_setup_mrr_tx_desc(ah, ds,
731 mrr_rate[0], mrr_tries[0],
732 mrr_rate[1], mrr_tries[1],
733 mrr_rate[2], mrr_tries[2]);
736 ds->ds_data = bf->skbaddr;
738 spin_lock_bh(&txq->lock);
739 list_add_tail(&bf->list, &txq->q);
741 if (txq->link == NULL) /* is this first packet? */
742 ath5k_hw_set_txdp(ah, txq->qnum, bf->daddr);
743 else /* no, so only link it */
744 *txq->link = bf->daddr;
746 txq->link = &ds->ds_link;
747 ath5k_hw_start_tx_dma(ah, txq->qnum);
749 spin_unlock_bh(&txq->lock);
753 pci_unmap_single(sc->pdev, bf->skbaddr, skb->len, PCI_DMA_TODEVICE);
757 /*******************\
758 * Descriptors setup *
759 \*******************/
762 ath5k_desc_alloc(struct ath5k_softc *sc, struct pci_dev *pdev)
764 struct ath5k_desc *ds;
765 struct ath5k_buf *bf;
770 /* allocate descriptors */
771 sc->desc_len = sizeof(struct ath5k_desc) *
772 (ATH_TXBUF + ATH_RXBUF + ATH_BCBUF + 1);
773 sc->desc = pci_alloc_consistent(pdev, sc->desc_len, &sc->desc_daddr);
774 if (sc->desc == NULL) {
775 ATH5K_ERR(sc, "can't allocate descriptors\n");
781 ATH5K_DBG(sc, ATH5K_DEBUG_ANY, "DMA map: %p (%zu) -> %llx\n",
782 ds, sc->desc_len, (unsigned long long)sc->desc_daddr);
784 bf = kcalloc(1 + ATH_TXBUF + ATH_RXBUF + ATH_BCBUF,
785 sizeof(struct ath5k_buf), GFP_KERNEL);
787 ATH5K_ERR(sc, "can't allocate bufptr\n");
793 INIT_LIST_HEAD(&sc->rxbuf);
794 for (i = 0; i < ATH_RXBUF; i++, bf++, ds++, da += sizeof(*ds)) {
797 list_add_tail(&bf->list, &sc->rxbuf);
800 INIT_LIST_HEAD(&sc->txbuf);
801 sc->txbuf_len = ATH_TXBUF;
802 for (i = 0; i < ATH_TXBUF; i++, bf++, ds++,
806 list_add_tail(&bf->list, &sc->txbuf);
816 pci_free_consistent(pdev, sc->desc_len, sc->desc, sc->desc_daddr);
823 ath5k_desc_free(struct ath5k_softc *sc, struct pci_dev *pdev)
825 struct ath5k_buf *bf;
827 ath5k_txbuf_free_skb(sc, sc->bbuf);
828 list_for_each_entry(bf, &sc->txbuf, list)
829 ath5k_txbuf_free_skb(sc, bf);
830 list_for_each_entry(bf, &sc->rxbuf, list)
831 ath5k_rxbuf_free_skb(sc, bf);
833 /* Free memory associated with all descriptors */
834 pci_free_consistent(pdev, sc->desc_len, sc->desc, sc->desc_daddr);
848 static struct ath5k_txq *
849 ath5k_txq_setup(struct ath5k_softc *sc,
850 int qtype, int subtype)
852 struct ath5k_hw *ah = sc->ah;
853 struct ath5k_txq *txq;
854 struct ath5k_txq_info qi = {
855 .tqi_subtype = subtype,
856 /* XXX: default values not correct for B and XR channels,
858 .tqi_aifs = AR5K_TUNE_AIFS,
859 .tqi_cw_min = AR5K_TUNE_CWMIN,
860 .tqi_cw_max = AR5K_TUNE_CWMAX
865 * Enable interrupts only for EOL and DESC conditions.
866 * We mark tx descriptors to receive a DESC interrupt
867 * when a tx queue gets deep; otherwise we wait for the
868 * EOL to reap descriptors. Note that this is done to
869 * reduce interrupt load and this only defers reaping
870 * descriptors, never transmitting frames. Aside from
871 * reducing interrupts this also permits more concurrency.
872 * The only potential downside is if the tx queue backs
873 * up in which case the top half of the kernel may backup
874 * due to a lack of tx descriptors.
876 qi.tqi_flags = AR5K_TXQ_FLAG_TXEOLINT_ENABLE |
877 AR5K_TXQ_FLAG_TXDESCINT_ENABLE;
878 qnum = ath5k_hw_setup_tx_queue(ah, qtype, &qi);
881 * NB: don't print a message, this happens
882 * normally on parts with too few tx queues
884 return ERR_PTR(qnum);
886 if (qnum >= ARRAY_SIZE(sc->txqs)) {
887 ATH5K_ERR(sc, "hw qnum %u out of range, max %tu!\n",
888 qnum, ARRAY_SIZE(sc->txqs));
889 ath5k_hw_release_tx_queue(ah, qnum);
890 return ERR_PTR(-EINVAL);
892 txq = &sc->txqs[qnum];
896 INIT_LIST_HEAD(&txq->q);
897 spin_lock_init(&txq->lock);
900 txq->txq_poll_mark = false;
903 return &sc->txqs[qnum];
907 ath5k_beaconq_setup(struct ath5k_hw *ah)
909 struct ath5k_txq_info qi = {
910 /* XXX: default values not correct for B and XR channels,
912 .tqi_aifs = AR5K_TUNE_AIFS,
913 .tqi_cw_min = AR5K_TUNE_CWMIN,
914 .tqi_cw_max = AR5K_TUNE_CWMAX,
915 /* NB: for dynamic turbo, don't enable any other interrupts */
916 .tqi_flags = AR5K_TXQ_FLAG_TXDESCINT_ENABLE
919 return ath5k_hw_setup_tx_queue(ah, AR5K_TX_QUEUE_BEACON, &qi);
923 ath5k_beaconq_config(struct ath5k_softc *sc)
925 struct ath5k_hw *ah = sc->ah;
926 struct ath5k_txq_info qi;
929 ret = ath5k_hw_get_tx_queueprops(ah, sc->bhalq, &qi);
933 if (sc->opmode == NL80211_IFTYPE_AP ||
934 sc->opmode == NL80211_IFTYPE_MESH_POINT) {
936 * Always burst out beacon and CAB traffic
937 * (aifs = cwmin = cwmax = 0)
942 } else if (sc->opmode == NL80211_IFTYPE_ADHOC) {
944 * Adhoc mode; backoff between 0 and (2 * cw_min).
948 qi.tqi_cw_max = 2 * AR5K_TUNE_CWMIN;
951 ATH5K_DBG(sc, ATH5K_DEBUG_BEACON,
952 "beacon queueprops tqi_aifs:%d tqi_cw_min:%d tqi_cw_max:%d\n",
953 qi.tqi_aifs, qi.tqi_cw_min, qi.tqi_cw_max);
955 ret = ath5k_hw_set_tx_queueprops(ah, sc->bhalq, &qi);
957 ATH5K_ERR(sc, "%s: unable to update parameters for beacon "
958 "hardware queue!\n", __func__);
961 ret = ath5k_hw_reset_tx_queue(ah, sc->bhalq); /* push to h/w */
965 /* reconfigure cabq with ready time to 80% of beacon_interval */
966 ret = ath5k_hw_get_tx_queueprops(ah, AR5K_TX_QUEUE_ID_CAB, &qi);
970 qi.tqi_ready_time = (sc->bintval * 80) / 100;
971 ret = ath5k_hw_set_tx_queueprops(ah, AR5K_TX_QUEUE_ID_CAB, &qi);
975 ret = ath5k_hw_reset_tx_queue(ah, AR5K_TX_QUEUE_ID_CAB);
981 ath5k_txq_drainq(struct ath5k_softc *sc, struct ath5k_txq *txq)
983 struct ath5k_buf *bf, *bf0;
986 * NB: this assumes output has been stopped and
987 * we do not need to block ath5k_tx_tasklet
989 spin_lock_bh(&txq->lock);
990 list_for_each_entry_safe(bf, bf0, &txq->q, list) {
991 ath5k_debug_printtxbuf(sc, bf);
993 ath5k_txbuf_free_skb(sc, bf);
995 spin_lock_bh(&sc->txbuflock);
996 list_move_tail(&bf->list, &sc->txbuf);
999 spin_unlock_bh(&sc->txbuflock);
1002 txq->txq_poll_mark = false;
1003 spin_unlock_bh(&txq->lock);
1007 * Drain the transmit queues and reclaim resources.
1010 ath5k_txq_cleanup(struct ath5k_softc *sc)
1012 struct ath5k_hw *ah = sc->ah;
1015 /* XXX return value */
1016 if (likely(!test_bit(ATH_STAT_INVALID, sc->status))) {
1017 /* don't touch the hardware if marked invalid */
1018 ath5k_hw_stop_tx_dma(ah, sc->bhalq);
1019 ATH5K_DBG(sc, ATH5K_DEBUG_RESET, "beacon queue %x\n",
1020 ath5k_hw_get_txdp(ah, sc->bhalq));
1021 for (i = 0; i < ARRAY_SIZE(sc->txqs); i++)
1022 if (sc->txqs[i].setup) {
1023 ath5k_hw_stop_tx_dma(ah, sc->txqs[i].qnum);
1024 ATH5K_DBG(sc, ATH5K_DEBUG_RESET, "txq [%u] %x, "
1027 ath5k_hw_get_txdp(ah,
1033 for (i = 0; i < ARRAY_SIZE(sc->txqs); i++)
1034 if (sc->txqs[i].setup)
1035 ath5k_txq_drainq(sc, &sc->txqs[i]);
1039 ath5k_txq_release(struct ath5k_softc *sc)
1041 struct ath5k_txq *txq = sc->txqs;
1044 for (i = 0; i < ARRAY_SIZE(sc->txqs); i++, txq++)
1046 ath5k_hw_release_tx_queue(sc->ah, txq->qnum);
1057 * Enable the receive h/w following a reset.
1060 ath5k_rx_start(struct ath5k_softc *sc)
1062 struct ath5k_hw *ah = sc->ah;
1063 struct ath_common *common = ath5k_hw_common(ah);
1064 struct ath5k_buf *bf;
1067 common->rx_bufsize = roundup(IEEE80211_MAX_FRAME_LEN, common->cachelsz);
1069 ATH5K_DBG(sc, ATH5K_DEBUG_RESET, "cachelsz %u rx_bufsize %u\n",
1070 common->cachelsz, common->rx_bufsize);
1072 spin_lock_bh(&sc->rxbuflock);
1074 list_for_each_entry(bf, &sc->rxbuf, list) {
1075 ret = ath5k_rxbuf_setup(sc, bf);
1077 spin_unlock_bh(&sc->rxbuflock);
1081 bf = list_first_entry(&sc->rxbuf, struct ath5k_buf, list);
1082 ath5k_hw_set_rxdp(ah, bf->daddr);
1083 spin_unlock_bh(&sc->rxbuflock);
1085 ath5k_hw_start_rx_dma(ah); /* enable recv descriptors */
1086 ath5k_mode_setup(sc); /* set filters, etc. */
1087 ath5k_hw_start_rx_pcu(ah); /* re-enable PCU/DMA engine */
1095 * Disable the receive h/w in preparation for a reset.
1098 ath5k_rx_stop(struct ath5k_softc *sc)
1100 struct ath5k_hw *ah = sc->ah;
1102 ath5k_hw_stop_rx_pcu(ah); /* disable PCU */
1103 ath5k_hw_set_rx_filter(ah, 0); /* clear recv filter */
1104 ath5k_hw_stop_rx_dma(ah); /* disable DMA engine */
1106 ath5k_debug_printrxbuffs(sc, ah);
1110 ath5k_rx_decrypted(struct ath5k_softc *sc, struct sk_buff *skb,
1111 struct ath5k_rx_status *rs)
1113 struct ath5k_hw *ah = sc->ah;
1114 struct ath_common *common = ath5k_hw_common(ah);
1115 struct ieee80211_hdr *hdr = (void *)skb->data;
1116 unsigned int keyix, hlen;
1118 if (!(rs->rs_status & AR5K_RXERR_DECRYPT) &&
1119 rs->rs_keyix != AR5K_RXKEYIX_INVALID)
1120 return RX_FLAG_DECRYPTED;
1122 /* Apparently when a default key is used to decrypt the packet
1123 the hw does not set the index used to decrypt. In such cases
1124 get the index from the packet. */
1125 hlen = ieee80211_hdrlen(hdr->frame_control);
1126 if (ieee80211_has_protected(hdr->frame_control) &&
1127 !(rs->rs_status & AR5K_RXERR_DECRYPT) &&
1128 skb->len >= hlen + 4) {
1129 keyix = skb->data[hlen + 3] >> 6;
1131 if (test_bit(keyix, common->keymap))
1132 return RX_FLAG_DECRYPTED;
1140 ath5k_check_ibss_tsf(struct ath5k_softc *sc, struct sk_buff *skb,
1141 struct ieee80211_rx_status *rxs)
1143 struct ath_common *common = ath5k_hw_common(sc->ah);
1146 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)skb->data;
1148 if (ieee80211_is_beacon(mgmt->frame_control) &&
1149 le16_to_cpu(mgmt->u.beacon.capab_info) & WLAN_CAPABILITY_IBSS &&
1150 memcmp(mgmt->bssid, common->curbssid, ETH_ALEN) == 0) {
1152 * Received an IBSS beacon with the same BSSID. Hardware *must*
1153 * have updated the local TSF. We have to work around various
1154 * hardware bugs, though...
1156 tsf = ath5k_hw_get_tsf64(sc->ah);
1157 bc_tstamp = le64_to_cpu(mgmt->u.beacon.timestamp);
1158 hw_tu = TSF_TO_TU(tsf);
1160 ATH5K_DBG_UNLIMIT(sc, ATH5K_DEBUG_BEACON,
1161 "beacon %llx mactime %llx (diff %lld) tsf now %llx\n",
1162 (unsigned long long)bc_tstamp,
1163 (unsigned long long)rxs->mactime,
1164 (unsigned long long)(rxs->mactime - bc_tstamp),
1165 (unsigned long long)tsf);
1168 * Sometimes the HW will give us a wrong tstamp in the rx
1169 * status, causing the timestamp extension to go wrong.
1170 * (This seems to happen especially with beacon frames bigger
1171 * than 78 byte (incl. FCS))
1172 * But we know that the receive timestamp must be later than the
1173 * timestamp of the beacon since HW must have synced to that.
1175 * NOTE: here we assume mactime to be after the frame was
1176 * received, not like mac80211 which defines it at the start.
1178 if (bc_tstamp > rxs->mactime) {
1179 ATH5K_DBG_UNLIMIT(sc, ATH5K_DEBUG_BEACON,
1180 "fixing mactime from %llx to %llx\n",
1181 (unsigned long long)rxs->mactime,
1182 (unsigned long long)tsf);
1187 * Local TSF might have moved higher than our beacon timers,
1188 * in that case we have to update them to continue sending
1189 * beacons. This also takes care of synchronizing beacon sending
1190 * times with other stations.
1192 if (hw_tu >= sc->nexttbtt)
1193 ath5k_beacon_update_timers(sc, bc_tstamp);
1195 /* Check if the beacon timers are still correct, because a TSF
1196 * update might have created a window between them - for a
1197 * longer description see the comment of this function: */
1198 if (!ath5k_hw_check_beacon_timers(sc->ah, sc->bintval)) {
1199 ath5k_beacon_update_timers(sc, bc_tstamp);
1200 ATH5K_DBG_UNLIMIT(sc, ATH5K_DEBUG_BEACON,
1201 "fixed beacon timers after beacon receive\n");
1207 ath5k_update_beacon_rssi(struct ath5k_softc *sc, struct sk_buff *skb, int rssi)
1209 struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)skb->data;
1210 struct ath5k_hw *ah = sc->ah;
1211 struct ath_common *common = ath5k_hw_common(ah);
1213 /* only beacons from our BSSID */
1214 if (!ieee80211_is_beacon(mgmt->frame_control) ||
1215 memcmp(mgmt->bssid, common->curbssid, ETH_ALEN) != 0)
1218 ah->ah_beacon_rssi_avg = ath5k_moving_average(ah->ah_beacon_rssi_avg,
1221 /* in IBSS mode we should keep RSSI statistics per neighbour */
1222 /* le16_to_cpu(mgmt->u.beacon.capab_info) & WLAN_CAPABILITY_IBSS */
1226 * Compute padding position. skb must contain an IEEE 802.11 frame
1228 static int ath5k_common_padpos(struct sk_buff *skb)
1230 struct ieee80211_hdr * hdr = (struct ieee80211_hdr *)skb->data;
1231 __le16 frame_control = hdr->frame_control;
1234 if (ieee80211_has_a4(frame_control)) {
1237 if (ieee80211_is_data_qos(frame_control)) {
1238 padpos += IEEE80211_QOS_CTL_LEN;
1245 * This function expects an 802.11 frame and returns the number of
1246 * bytes added, or -1 if we don't have enough header room.
1248 static int ath5k_add_padding(struct sk_buff *skb)
1250 int padpos = ath5k_common_padpos(skb);
1251 int padsize = padpos & 3;
1253 if (padsize && skb->len>padpos) {
1255 if (skb_headroom(skb) < padsize)
1258 skb_push(skb, padsize);
1259 memmove(skb->data, skb->data+padsize, padpos);
1267 * The MAC header is padded to have 32-bit boundary if the
1268 * packet payload is non-zero. The general calculation for
1269 * padsize would take into account odd header lengths:
1270 * padsize = 4 - (hdrlen & 3); however, since only
1271 * even-length headers are used, padding can only be 0 or 2
1272 * bytes and we can optimize this a bit. We must not try to
1273 * remove padding from short control frames that do not have a
1276 * This function expects an 802.11 frame and returns the number of
1279 static int ath5k_remove_padding(struct sk_buff *skb)
1281 int padpos = ath5k_common_padpos(skb);
1282 int padsize = padpos & 3;
1284 if (padsize && skb->len>=padpos+padsize) {
1285 memmove(skb->data + padsize, skb->data, padpos);
1286 skb_pull(skb, padsize);
1294 ath5k_receive_frame(struct ath5k_softc *sc, struct sk_buff *skb,
1295 struct ath5k_rx_status *rs)
1297 struct ieee80211_rx_status *rxs;
1299 ath5k_remove_padding(skb);
1301 rxs = IEEE80211_SKB_RXCB(skb);
1304 if (unlikely(rs->rs_status & AR5K_RXERR_MIC))
1305 rxs->flag |= RX_FLAG_MMIC_ERROR;
1308 * always extend the mac timestamp, since this information is
1309 * also needed for proper IBSS merging.
1311 * XXX: it might be too late to do it here, since rs_tstamp is
1312 * 15bit only. that means TSF extension has to be done within
1313 * 32768usec (about 32ms). it might be necessary to move this to
1314 * the interrupt handler, like it is done in madwifi.
1316 * Unfortunately we don't know when the hardware takes the rx
1317 * timestamp (beginning of phy frame, data frame, end of rx?).
1318 * The only thing we know is that it is hardware specific...
1319 * On AR5213 it seems the rx timestamp is at the end of the
1320 * frame, but i'm not sure.
1322 * NOTE: mac80211 defines mactime at the beginning of the first
1323 * data symbol. Since we don't have any time references it's
1324 * impossible to comply to that. This affects IBSS merge only
1325 * right now, so it's not too bad...
1327 rxs->mactime = ath5k_extend_tsf(sc->ah, rs->rs_tstamp);
1328 rxs->flag |= RX_FLAG_TSFT;
1330 rxs->freq = sc->curchan->center_freq;
1331 rxs->band = sc->curband->band;
1333 rxs->signal = sc->ah->ah_noise_floor + rs->rs_rssi;
1335 rxs->antenna = rs->rs_antenna;
1337 if (rs->rs_antenna > 0 && rs->rs_antenna < 5)
1338 sc->stats.antenna_rx[rs->rs_antenna]++;
1340 sc->stats.antenna_rx[0]++; /* invalid */
1342 rxs->rate_idx = ath5k_hw_to_driver_rix(sc, rs->rs_rate);
1343 rxs->flag |= ath5k_rx_decrypted(sc, skb, rs);
1345 if (rxs->rate_idx >= 0 && rs->rs_rate ==
1346 sc->curband->bitrates[rxs->rate_idx].hw_value_short)
1347 rxs->flag |= RX_FLAG_SHORTPRE;
1349 ath5k_debug_dump_skb(sc, skb, "RX ", 0);
1351 ath5k_update_beacon_rssi(sc, skb, rs->rs_rssi);
1353 /* check beacons in IBSS mode */
1354 if (sc->opmode == NL80211_IFTYPE_ADHOC)
1355 ath5k_check_ibss_tsf(sc, skb, rxs);
1357 ieee80211_rx(sc->hw, skb);
1360 /** ath5k_frame_receive_ok() - Do we want to receive this frame or not?
1362 * Check if we want to further process this frame or not. Also update
1363 * statistics. Return true if we want this frame, false if not.
1366 ath5k_receive_frame_ok(struct ath5k_softc *sc, struct ath5k_rx_status *rs)
1368 sc->stats.rx_all_count++;
1370 if (unlikely(rs->rs_status)) {
1371 if (rs->rs_status & AR5K_RXERR_CRC)
1372 sc->stats.rxerr_crc++;
1373 if (rs->rs_status & AR5K_RXERR_FIFO)
1374 sc->stats.rxerr_fifo++;
1375 if (rs->rs_status & AR5K_RXERR_PHY) {
1376 sc->stats.rxerr_phy++;
1377 if (rs->rs_phyerr > 0 && rs->rs_phyerr < 32)
1378 sc->stats.rxerr_phy_code[rs->rs_phyerr]++;
1381 if (rs->rs_status & AR5K_RXERR_DECRYPT) {
1383 * Decrypt error. If the error occurred
1384 * because there was no hardware key, then
1385 * let the frame through so the upper layers
1386 * can process it. This is necessary for 5210
1387 * parts which have no way to setup a ``clear''
1390 * XXX do key cache faulting
1392 sc->stats.rxerr_decrypt++;
1393 if (rs->rs_keyix == AR5K_RXKEYIX_INVALID &&
1394 !(rs->rs_status & AR5K_RXERR_CRC))
1397 if (rs->rs_status & AR5K_RXERR_MIC) {
1398 sc->stats.rxerr_mic++;
1402 /* reject any frames with non-crypto errors */
1403 if (rs->rs_status & ~(AR5K_RXERR_DECRYPT))
1407 if (unlikely(rs->rs_more)) {
1408 sc->stats.rxerr_jumbo++;
1415 ath5k_tasklet_rx(unsigned long data)
1417 struct ath5k_rx_status rs = {};
1418 struct sk_buff *skb, *next_skb;
1419 dma_addr_t next_skb_addr;
1420 struct ath5k_softc *sc = (void *)data;
1421 struct ath5k_hw *ah = sc->ah;
1422 struct ath_common *common = ath5k_hw_common(ah);
1423 struct ath5k_buf *bf;
1424 struct ath5k_desc *ds;
1427 spin_lock(&sc->rxbuflock);
1428 if (list_empty(&sc->rxbuf)) {
1429 ATH5K_WARN(sc, "empty rx buf pool\n");
1433 bf = list_first_entry(&sc->rxbuf, struct ath5k_buf, list);
1434 BUG_ON(bf->skb == NULL);
1438 /* bail if HW is still using self-linked descriptor */
1439 if (ath5k_hw_get_rxdp(sc->ah) == bf->daddr)
1442 ret = sc->ah->ah_proc_rx_desc(sc->ah, ds, &rs);
1443 if (unlikely(ret == -EINPROGRESS))
1445 else if (unlikely(ret)) {
1446 ATH5K_ERR(sc, "error in processing rx descriptor\n");
1447 sc->stats.rxerr_proc++;
1451 if (ath5k_receive_frame_ok(sc, &rs)) {
1452 next_skb = ath5k_rx_skb_alloc(sc, &next_skb_addr);
1455 * If we can't replace bf->skb with a new skb under
1456 * memory pressure, just skip this packet
1461 pci_unmap_single(sc->pdev, bf->skbaddr,
1463 PCI_DMA_FROMDEVICE);
1465 skb_put(skb, rs.rs_datalen);
1467 ath5k_receive_frame(sc, skb, &rs);
1470 bf->skbaddr = next_skb_addr;
1473 list_move_tail(&bf->list, &sc->rxbuf);
1474 } while (ath5k_rxbuf_setup(sc, bf) == 0);
1476 spin_unlock(&sc->rxbuflock);
1484 static int ath5k_tx_queue(struct ieee80211_hw *hw, struct sk_buff *skb,
1485 struct ath5k_txq *txq)
1487 struct ath5k_softc *sc = hw->priv;
1488 struct ath5k_buf *bf;
1489 unsigned long flags;
1492 ath5k_debug_dump_skb(sc, skb, "TX ", 1);
1495 * The hardware expects the header padded to 4 byte boundaries.
1496 * If this is not the case, we add the padding after the header.
1498 padsize = ath5k_add_padding(skb);
1500 ATH5K_ERR(sc, "tx hdrlen not %%4: not enough"
1501 " headroom to pad");
1505 if (txq->txq_len >= ATH5K_TXQ_LEN_MAX)
1506 ieee80211_stop_queue(hw, txq->qnum);
1508 spin_lock_irqsave(&sc->txbuflock, flags);
1509 if (list_empty(&sc->txbuf)) {
1510 ATH5K_ERR(sc, "no further txbuf available, dropping packet\n");
1511 spin_unlock_irqrestore(&sc->txbuflock, flags);
1512 ieee80211_stop_queues(hw);
1515 bf = list_first_entry(&sc->txbuf, struct ath5k_buf, list);
1516 list_del(&bf->list);
1518 if (list_empty(&sc->txbuf))
1519 ieee80211_stop_queues(hw);
1520 spin_unlock_irqrestore(&sc->txbuflock, flags);
1524 if (ath5k_txbuf_setup(sc, bf, txq, padsize)) {
1526 spin_lock_irqsave(&sc->txbuflock, flags);
1527 list_add_tail(&bf->list, &sc->txbuf);
1529 spin_unlock_irqrestore(&sc->txbuflock, flags);
1532 return NETDEV_TX_OK;
1535 dev_kfree_skb_any(skb);
1536 return NETDEV_TX_OK;
1540 ath5k_tx_frame_completed(struct ath5k_softc *sc, struct sk_buff *skb,
1541 struct ath5k_tx_status *ts)
1543 struct ieee80211_tx_info *info;
1546 sc->stats.tx_all_count++;
1547 info = IEEE80211_SKB_CB(skb);
1549 ieee80211_tx_info_clear_status(info);
1550 for (i = 0; i < 4; i++) {
1551 struct ieee80211_tx_rate *r =
1552 &info->status.rates[i];
1554 if (ts->ts_rate[i]) {
1555 r->idx = ath5k_hw_to_driver_rix(sc, ts->ts_rate[i]);
1556 r->count = ts->ts_retry[i];
1563 /* count the successful attempt as well */
1564 info->status.rates[ts->ts_final_idx].count++;
1566 if (unlikely(ts->ts_status)) {
1567 sc->stats.ack_fail++;
1568 if (ts->ts_status & AR5K_TXERR_FILT) {
1569 info->flags |= IEEE80211_TX_STAT_TX_FILTERED;
1570 sc->stats.txerr_filt++;
1572 if (ts->ts_status & AR5K_TXERR_XRETRY)
1573 sc->stats.txerr_retry++;
1574 if (ts->ts_status & AR5K_TXERR_FIFO)
1575 sc->stats.txerr_fifo++;
1577 info->flags |= IEEE80211_TX_STAT_ACK;
1578 info->status.ack_signal = ts->ts_rssi;
1582 * Remove MAC header padding before giving the frame
1585 ath5k_remove_padding(skb);
1587 if (ts->ts_antenna > 0 && ts->ts_antenna < 5)
1588 sc->stats.antenna_tx[ts->ts_antenna]++;
1590 sc->stats.antenna_tx[0]++; /* invalid */
1592 ieee80211_tx_status(sc->hw, skb);
1596 ath5k_tx_processq(struct ath5k_softc *sc, struct ath5k_txq *txq)
1598 struct ath5k_tx_status ts = {};
1599 struct ath5k_buf *bf, *bf0;
1600 struct ath5k_desc *ds;
1601 struct sk_buff *skb;
1604 spin_lock(&txq->lock);
1605 list_for_each_entry_safe(bf, bf0, &txq->q, list) {
1607 txq->txq_poll_mark = false;
1609 /* skb might already have been processed last time. */
1610 if (bf->skb != NULL) {
1613 ret = sc->ah->ah_proc_tx_desc(sc->ah, ds, &ts);
1614 if (unlikely(ret == -EINPROGRESS))
1616 else if (unlikely(ret)) {
1618 "error %d while processing "
1619 "queue %u\n", ret, txq->qnum);
1625 pci_unmap_single(sc->pdev, bf->skbaddr, skb->len,
1627 ath5k_tx_frame_completed(sc, skb, &ts);
1631 * It's possible that the hardware can say the buffer is
1632 * completed when it hasn't yet loaded the ds_link from
1633 * host memory and moved on.
1634 * Always keep the last descriptor to avoid HW races...
1636 if (ath5k_hw_get_txdp(sc->ah, txq->qnum) != bf->daddr) {
1637 spin_lock(&sc->txbuflock);
1638 list_move_tail(&bf->list, &sc->txbuf);
1641 spin_unlock(&sc->txbuflock);
1644 spin_unlock(&txq->lock);
1645 if (txq->txq_len < ATH5K_TXQ_LEN_LOW)
1646 ieee80211_wake_queue(sc->hw, txq->qnum);
1650 ath5k_tasklet_tx(unsigned long data)
1653 struct ath5k_softc *sc = (void *)data;
1655 for (i=0; i < AR5K_NUM_TX_QUEUES; i++)
1656 if (sc->txqs[i].setup && (sc->ah->ah_txq_isr & BIT(i)))
1657 ath5k_tx_processq(sc, &sc->txqs[i]);
1666 * Setup the beacon frame for transmit.
1669 ath5k_beacon_setup(struct ath5k_softc *sc, struct ath5k_buf *bf)
1671 struct sk_buff *skb = bf->skb;
1672 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
1673 struct ath5k_hw *ah = sc->ah;
1674 struct ath5k_desc *ds;
1678 const int padsize = 0;
1680 bf->skbaddr = pci_map_single(sc->pdev, skb->data, skb->len,
1682 ATH5K_DBG(sc, ATH5K_DEBUG_BEACON, "skb %p [data %p len %u] "
1683 "skbaddr %llx\n", skb, skb->data, skb->len,
1684 (unsigned long long)bf->skbaddr);
1685 if (pci_dma_mapping_error(sc->pdev, bf->skbaddr)) {
1686 ATH5K_ERR(sc, "beacon DMA mapping failed\n");
1691 antenna = ah->ah_tx_ant;
1693 flags = AR5K_TXDESC_NOACK;
1694 if (sc->opmode == NL80211_IFTYPE_ADHOC && ath5k_hw_hasveol(ah)) {
1695 ds->ds_link = bf->daddr; /* self-linked */
1696 flags |= AR5K_TXDESC_VEOL;
1701 * If we use multiple antennas on AP and use
1702 * the Sectored AP scenario, switch antenna every
1703 * 4 beacons to make sure everybody hears our AP.
1704 * When a client tries to associate, hw will keep
1705 * track of the tx antenna to be used for this client
1706 * automaticaly, based on ACKed packets.
1708 * Note: AP still listens and transmits RTS on the
1709 * default antenna which is supposed to be an omni.
1711 * Note2: On sectored scenarios it's possible to have
1712 * multiple antennas (1 omni -- the default -- and 14
1713 * sectors), so if we choose to actually support this
1714 * mode, we need to allow the user to set how many antennas
1715 * we have and tweak the code below to send beacons
1718 if (ah->ah_ant_mode == AR5K_ANTMODE_SECTOR_AP)
1719 antenna = sc->bsent & 4 ? 2 : 1;
1722 /* FIXME: If we are in g mode and rate is a CCK rate
1723 * subtract ah->ah_txpower.txp_cck_ofdm_pwr_delta
1724 * from tx power (value is in dB units already) */
1725 ds->ds_data = bf->skbaddr;
1726 ret = ah->ah_setup_tx_desc(ah, ds, skb->len,
1727 ieee80211_get_hdrlen_from_skb(skb), padsize,
1728 AR5K_PKT_TYPE_BEACON, (sc->power_level * 2),
1729 ieee80211_get_tx_rate(sc->hw, info)->hw_value,
1730 1, AR5K_TXKEYIX_INVALID,
1731 antenna, flags, 0, 0);
1737 pci_unmap_single(sc->pdev, bf->skbaddr, skb->len, PCI_DMA_TODEVICE);
1742 * Updates the beacon that is sent by ath5k_beacon_send. For adhoc,
1743 * this is called only once at config_bss time, for AP we do it every
1744 * SWBA interrupt so that the TIM will reflect buffered frames.
1746 * Called with the beacon lock.
1749 ath5k_beacon_update(struct ieee80211_hw *hw, struct ieee80211_vif *vif)
1752 struct ath5k_softc *sc = hw->priv;
1753 struct sk_buff *skb;
1755 if (WARN_ON(!vif)) {
1760 skb = ieee80211_beacon_get(hw, vif);
1767 ath5k_debug_dump_skb(sc, skb, "BC ", 1);
1769 ath5k_txbuf_free_skb(sc, sc->bbuf);
1770 sc->bbuf->skb = skb;
1771 ret = ath5k_beacon_setup(sc, sc->bbuf);
1773 sc->bbuf->skb = NULL;
1779 * Transmit a beacon frame at SWBA. Dynamic updates to the
1780 * frame contents are done as needed and the slot time is
1781 * also adjusted based on current state.
1783 * This is called from software irq context (beacontq tasklets)
1784 * or user context from ath5k_beacon_config.
1787 ath5k_beacon_send(struct ath5k_softc *sc)
1789 struct ath5k_buf *bf = sc->bbuf;
1790 struct ath5k_hw *ah = sc->ah;
1791 struct sk_buff *skb;
1793 ATH5K_DBG_UNLIMIT(sc, ATH5K_DEBUG_BEACON, "in beacon_send\n");
1795 if (unlikely(bf->skb == NULL || sc->opmode == NL80211_IFTYPE_STATION)) {
1796 ATH5K_WARN(sc, "bf=%p bf_skb=%p\n", bf, bf ? bf->skb : NULL);
1800 * Check if the previous beacon has gone out. If
1801 * not, don't don't try to post another: skip this
1802 * period and wait for the next. Missed beacons
1803 * indicate a problem and should not occur. If we
1804 * miss too many consecutive beacons reset the device.
1806 if (unlikely(ath5k_hw_num_tx_pending(ah, sc->bhalq) != 0)) {
1808 ATH5K_DBG(sc, ATH5K_DEBUG_BEACON,
1809 "missed %u consecutive beacons\n", sc->bmisscount);
1810 if (sc->bmisscount > 10) { /* NB: 10 is a guess */
1811 ATH5K_DBG(sc, ATH5K_DEBUG_BEACON,
1812 "stuck beacon time (%u missed)\n",
1814 ATH5K_DBG(sc, ATH5K_DEBUG_RESET,
1815 "stuck beacon, resetting\n");
1816 ieee80211_queue_work(sc->hw, &sc->reset_work);
1820 if (unlikely(sc->bmisscount != 0)) {
1821 ATH5K_DBG(sc, ATH5K_DEBUG_BEACON,
1822 "resume beacon xmit after %u misses\n",
1828 * Stop any current dma and put the new frame on the queue.
1829 * This should never fail since we check above that no frames
1830 * are still pending on the queue.
1832 if (unlikely(ath5k_hw_stop_tx_dma(ah, sc->bhalq))) {
1833 ATH5K_WARN(sc, "beacon queue %u didn't start/stop ?\n", sc->bhalq);
1834 /* NB: hw still stops DMA, so proceed */
1837 /* refresh the beacon for AP mode */
1838 if (sc->opmode == NL80211_IFTYPE_AP)
1839 ath5k_beacon_update(sc->hw, sc->vif);
1841 ath5k_hw_set_txdp(ah, sc->bhalq, bf->daddr);
1842 ath5k_hw_start_tx_dma(ah, sc->bhalq);
1843 ATH5K_DBG(sc, ATH5K_DEBUG_BEACON, "TXDP[%u] = %llx (%p)\n",
1844 sc->bhalq, (unsigned long long)bf->daddr, bf->desc);
1846 skb = ieee80211_get_buffered_bc(sc->hw, sc->vif);
1848 ath5k_tx_queue(sc->hw, skb, sc->cabq);
1849 skb = ieee80211_get_buffered_bc(sc->hw, sc->vif);
1856 * ath5k_beacon_update_timers - update beacon timers
1858 * @sc: struct ath5k_softc pointer we are operating on
1859 * @bc_tsf: the timestamp of the beacon. 0 to reset the TSF. -1 to perform a
1860 * beacon timer update based on the current HW TSF.
1862 * Calculate the next target beacon transmit time (TBTT) based on the timestamp
1863 * of a received beacon or the current local hardware TSF and write it to the
1864 * beacon timer registers.
1866 * This is called in a variety of situations, e.g. when a beacon is received,
1867 * when a TSF update has been detected, but also when an new IBSS is created or
1868 * when we otherwise know we have to update the timers, but we keep it in this
1869 * function to have it all together in one place.
1872 ath5k_beacon_update_timers(struct ath5k_softc *sc, u64 bc_tsf)
1874 struct ath5k_hw *ah = sc->ah;
1875 u32 nexttbtt, intval, hw_tu, bc_tu;
1878 intval = sc->bintval & AR5K_BEACON_PERIOD;
1879 if (WARN_ON(!intval))
1882 /* beacon TSF converted to TU */
1883 bc_tu = TSF_TO_TU(bc_tsf);
1885 /* current TSF converted to TU */
1886 hw_tsf = ath5k_hw_get_tsf64(ah);
1887 hw_tu = TSF_TO_TU(hw_tsf);
1889 #define FUDGE AR5K_TUNE_SW_BEACON_RESP + 3
1890 /* We use FUDGE to make sure the next TBTT is ahead of the current TU.
1891 * Since we later substract AR5K_TUNE_SW_BEACON_RESP (10) in the timer
1892 * configuration we need to make sure it is bigger than that. */
1896 * no beacons received, called internally.
1897 * just need to refresh timers based on HW TSF.
1899 nexttbtt = roundup(hw_tu + FUDGE, intval);
1900 } else if (bc_tsf == 0) {
1902 * no beacon received, probably called by ath5k_reset_tsf().
1903 * reset TSF to start with 0.
1906 intval |= AR5K_BEACON_RESET_TSF;
1907 } else if (bc_tsf > hw_tsf) {
1909 * beacon received, SW merge happend but HW TSF not yet updated.
1910 * not possible to reconfigure timers yet, but next time we
1911 * receive a beacon with the same BSSID, the hardware will
1912 * automatically update the TSF and then we need to reconfigure
1915 ATH5K_DBG_UNLIMIT(sc, ATH5K_DEBUG_BEACON,
1916 "need to wait for HW TSF sync\n");
1920 * most important case for beacon synchronization between STA.
1922 * beacon received and HW TSF has been already updated by HW.
1923 * update next TBTT based on the TSF of the beacon, but make
1924 * sure it is ahead of our local TSF timer.
1926 nexttbtt = bc_tu + roundup(hw_tu + FUDGE - bc_tu, intval);
1930 sc->nexttbtt = nexttbtt;
1932 intval |= AR5K_BEACON_ENA;
1933 ath5k_hw_init_beacon(ah, nexttbtt, intval);
1936 * debugging output last in order to preserve the time critical aspect
1940 ATH5K_DBG_UNLIMIT(sc, ATH5K_DEBUG_BEACON,
1941 "reconfigured timers based on HW TSF\n");
1942 else if (bc_tsf == 0)
1943 ATH5K_DBG_UNLIMIT(sc, ATH5K_DEBUG_BEACON,
1944 "reset HW TSF and timers\n");
1946 ATH5K_DBG_UNLIMIT(sc, ATH5K_DEBUG_BEACON,
1947 "updated timers based on beacon TSF\n");
1949 ATH5K_DBG_UNLIMIT(sc, ATH5K_DEBUG_BEACON,
1950 "bc_tsf %llx hw_tsf %llx bc_tu %u hw_tu %u nexttbtt %u\n",
1951 (unsigned long long) bc_tsf,
1952 (unsigned long long) hw_tsf, bc_tu, hw_tu, nexttbtt);
1953 ATH5K_DBG_UNLIMIT(sc, ATH5K_DEBUG_BEACON, "intval %u %s %s\n",
1954 intval & AR5K_BEACON_PERIOD,
1955 intval & AR5K_BEACON_ENA ? "AR5K_BEACON_ENA" : "",
1956 intval & AR5K_BEACON_RESET_TSF ? "AR5K_BEACON_RESET_TSF" : "");
1960 * ath5k_beacon_config - Configure the beacon queues and interrupts
1962 * @sc: struct ath5k_softc pointer we are operating on
1964 * In IBSS mode we use a self-linked tx descriptor if possible. We enable SWBA
1965 * interrupts to detect TSF updates only.
1968 ath5k_beacon_config(struct ath5k_softc *sc)
1970 struct ath5k_hw *ah = sc->ah;
1971 unsigned long flags;
1973 spin_lock_irqsave(&sc->block, flags);
1975 sc->imask &= ~(AR5K_INT_BMISS | AR5K_INT_SWBA);
1977 if (sc->enable_beacon) {
1979 * In IBSS mode we use a self-linked tx descriptor and let the
1980 * hardware send the beacons automatically. We have to load it
1982 * We use the SWBA interrupt only to keep track of the beacon
1983 * timers in order to detect automatic TSF updates.
1985 ath5k_beaconq_config(sc);
1987 sc->imask |= AR5K_INT_SWBA;
1989 if (sc->opmode == NL80211_IFTYPE_ADHOC) {
1990 if (ath5k_hw_hasveol(ah))
1991 ath5k_beacon_send(sc);
1993 ath5k_beacon_update_timers(sc, -1);
1995 ath5k_hw_stop_tx_dma(sc->ah, sc->bhalq);
1998 ath5k_hw_set_imr(ah, sc->imask);
2000 spin_unlock_irqrestore(&sc->block, flags);
2003 static void ath5k_tasklet_beacon(unsigned long data)
2005 struct ath5k_softc *sc = (struct ath5k_softc *) data;
2008 * Software beacon alert--time to send a beacon.
2010 * In IBSS mode we use this interrupt just to
2011 * keep track of the next TBTT (target beacon
2012 * transmission time) in order to detect wether
2013 * automatic TSF updates happened.
2015 if (sc->opmode == NL80211_IFTYPE_ADHOC) {
2016 /* XXX: only if VEOL suppported */
2017 u64 tsf = ath5k_hw_get_tsf64(sc->ah);
2018 sc->nexttbtt += sc->bintval;
2019 ATH5K_DBG(sc, ATH5K_DEBUG_BEACON,
2020 "SWBA nexttbtt: %x hw_tu: %x "
2024 (unsigned long long) tsf);
2026 spin_lock(&sc->block);
2027 ath5k_beacon_send(sc);
2028 spin_unlock(&sc->block);
2033 /********************\
2034 * Interrupt handling *
2035 \********************/
2038 ath5k_intr_calibration_poll(struct ath5k_hw *ah)
2040 if (time_is_before_eq_jiffies(ah->ah_cal_next_ani) &&
2041 !(ah->ah_cal_mask & AR5K_CALIBRATION_FULL)) {
2042 /* run ANI only when full calibration is not active */
2043 ah->ah_cal_next_ani = jiffies +
2044 msecs_to_jiffies(ATH5K_TUNE_CALIBRATION_INTERVAL_ANI);
2045 tasklet_schedule(&ah->ah_sc->ani_tasklet);
2047 } else if (time_is_before_eq_jiffies(ah->ah_cal_next_full)) {
2048 ah->ah_cal_next_full = jiffies +
2049 msecs_to_jiffies(ATH5K_TUNE_CALIBRATION_INTERVAL_FULL);
2050 tasklet_schedule(&ah->ah_sc->calib);
2052 /* we could use SWI to generate enough interrupts to meet our
2053 * calibration interval requirements, if necessary:
2054 * AR5K_REG_ENABLE_BITS(ah, AR5K_CR, AR5K_CR_SWI); */
2058 ath5k_intr(int irq, void *dev_id)
2060 struct ath5k_softc *sc = dev_id;
2061 struct ath5k_hw *ah = sc->ah;
2062 enum ath5k_int status;
2063 unsigned int counter = 1000;
2065 if (unlikely(test_bit(ATH_STAT_INVALID, sc->status) ||
2066 !ath5k_hw_is_intr_pending(ah)))
2070 ath5k_hw_get_isr(ah, &status); /* NB: clears IRQ too */
2071 ATH5K_DBG(sc, ATH5K_DEBUG_INTR, "status 0x%x/0x%x\n",
2073 if (unlikely(status & AR5K_INT_FATAL)) {
2075 * Fatal errors are unrecoverable.
2076 * Typically these are caused by DMA errors.
2078 ATH5K_DBG(sc, ATH5K_DEBUG_RESET,
2079 "fatal int, resetting\n");
2080 ieee80211_queue_work(sc->hw, &sc->reset_work);
2081 } else if (unlikely(status & AR5K_INT_RXORN)) {
2083 * Receive buffers are full. Either the bus is busy or
2084 * the CPU is not fast enough to process all received
2086 * Older chipsets need a reset to come out of this
2087 * condition, but we treat it as RX for newer chips.
2088 * We don't know exactly which versions need a reset -
2089 * this guess is copied from the HAL.
2091 sc->stats.rxorn_intr++;
2092 if (ah->ah_mac_srev < AR5K_SREV_AR5212) {
2093 ATH5K_DBG(sc, ATH5K_DEBUG_RESET,
2094 "rx overrun, resetting\n");
2095 ieee80211_queue_work(sc->hw, &sc->reset_work);
2098 tasklet_schedule(&sc->rxtq);
2100 if (status & AR5K_INT_SWBA) {
2101 tasklet_hi_schedule(&sc->beacontq);
2103 if (status & AR5K_INT_RXEOL) {
2105 * NB: the hardware should re-read the link when
2106 * RXE bit is written, but it doesn't work at
2107 * least on older hardware revs.
2109 sc->stats.rxeol_intr++;
2111 if (status & AR5K_INT_TXURN) {
2112 /* bump tx trigger level */
2113 ath5k_hw_update_tx_triglevel(ah, true);
2115 if (status & (AR5K_INT_RXOK | AR5K_INT_RXERR))
2116 tasklet_schedule(&sc->rxtq);
2117 if (status & (AR5K_INT_TXOK | AR5K_INT_TXDESC
2118 | AR5K_INT_TXERR | AR5K_INT_TXEOL))
2119 tasklet_schedule(&sc->txtq);
2120 if (status & AR5K_INT_BMISS) {
2123 if (status & AR5K_INT_MIB) {
2124 sc->stats.mib_intr++;
2125 ath5k_hw_update_mib_counters(ah);
2126 ath5k_ani_mib_intr(ah);
2128 if (status & AR5K_INT_GPIO)
2129 tasklet_schedule(&sc->rf_kill.toggleq);
2132 } while (ath5k_hw_is_intr_pending(ah) && --counter > 0);
2134 if (unlikely(!counter))
2135 ATH5K_WARN(sc, "too many interrupts, giving up for now\n");
2137 ath5k_intr_calibration_poll(ah);
2143 * Periodically recalibrate the PHY to account
2144 * for temperature/environment changes.
2147 ath5k_tasklet_calibrate(unsigned long data)
2149 struct ath5k_softc *sc = (void *)data;
2150 struct ath5k_hw *ah = sc->ah;
2152 /* Only full calibration for now */
2153 ah->ah_cal_mask |= AR5K_CALIBRATION_FULL;
2155 ATH5K_DBG(sc, ATH5K_DEBUG_CALIBRATE, "channel %u/%x\n",
2156 ieee80211_frequency_to_channel(sc->curchan->center_freq),
2157 sc->curchan->hw_value);
2159 if (ath5k_hw_gainf_calibrate(ah) == AR5K_RFGAIN_NEED_CHANGE) {
2161 * Rfgain is out of bounds, reset the chip
2162 * to load new gain values.
2164 ATH5K_DBG(sc, ATH5K_DEBUG_RESET, "calibration, resetting\n");
2165 ieee80211_queue_work(sc->hw, &sc->reset_work);
2167 if (ath5k_hw_phy_calibrate(ah, sc->curchan))
2168 ATH5K_ERR(sc, "calibration of channel %u failed\n",
2169 ieee80211_frequency_to_channel(
2170 sc->curchan->center_freq));
2172 /* Noise floor calibration interrupts rx/tx path while I/Q calibration
2174 * TODO: We should stop TX here, so that it doesn't interfere.
2175 * Note that stopping the queues is not enough to stop TX! */
2176 if (time_is_before_eq_jiffies(ah->ah_cal_next_nf)) {
2177 ah->ah_cal_next_nf = jiffies +
2178 msecs_to_jiffies(ATH5K_TUNE_CALIBRATION_INTERVAL_NF);
2179 ath5k_hw_update_noise_floor(ah);
2182 ah->ah_cal_mask &= ~AR5K_CALIBRATION_FULL;
2187 ath5k_tasklet_ani(unsigned long data)
2189 struct ath5k_softc *sc = (void *)data;
2190 struct ath5k_hw *ah = sc->ah;
2192 ah->ah_cal_mask |= AR5K_CALIBRATION_ANI;
2193 ath5k_ani_calibration(ah);
2194 ah->ah_cal_mask &= ~AR5K_CALIBRATION_ANI;
2199 ath5k_tx_complete_poll_work(struct work_struct *work)
2201 struct ath5k_softc *sc = container_of(work, struct ath5k_softc,
2202 tx_complete_work.work);
2203 struct ath5k_txq *txq;
2205 bool needreset = false;
2207 for (i = 0; i < ARRAY_SIZE(sc->txqs); i++) {
2208 if (sc->txqs[i].setup) {
2210 spin_lock_bh(&txq->lock);
2211 if (txq->txq_len > 1) {
2212 if (txq->txq_poll_mark) {
2213 ATH5K_DBG(sc, ATH5K_DEBUG_XMIT,
2214 "TX queue stuck %d\n",
2218 spin_unlock_bh(&txq->lock);
2221 txq->txq_poll_mark = true;
2224 spin_unlock_bh(&txq->lock);
2229 ATH5K_DBG(sc, ATH5K_DEBUG_RESET,
2230 "TX queues stuck, resetting\n");
2231 ath5k_reset(sc, sc->curchan);
2234 ieee80211_queue_delayed_work(sc->hw, &sc->tx_complete_work,
2235 msecs_to_jiffies(ATH5K_TX_COMPLETE_POLL_INT));
2239 /*************************\
2240 * Initialization routines *
2241 \*************************/
2244 ath5k_stop_locked(struct ath5k_softc *sc)
2246 struct ath5k_hw *ah = sc->ah;
2248 ATH5K_DBG(sc, ATH5K_DEBUG_RESET, "invalid %u\n",
2249 test_bit(ATH_STAT_INVALID, sc->status));
2252 * Shutdown the hardware and driver:
2253 * stop output from above
2254 * disable interrupts
2256 * turn off the radio
2257 * clear transmit machinery
2258 * clear receive machinery
2259 * drain and release tx queues
2260 * reclaim beacon resources
2261 * power down hardware
2263 * Note that some of this work is not possible if the
2264 * hardware is gone (invalid).
2266 ieee80211_stop_queues(sc->hw);
2268 if (!test_bit(ATH_STAT_INVALID, sc->status)) {
2270 ath5k_hw_set_imr(ah, 0);
2271 synchronize_irq(sc->pdev->irq);
2273 ath5k_txq_cleanup(sc);
2274 if (!test_bit(ATH_STAT_INVALID, sc->status)) {
2276 ath5k_hw_phy_disable(ah);
2283 ath5k_init(struct ath5k_softc *sc)
2285 struct ath5k_hw *ah = sc->ah;
2286 struct ath_common *common = ath5k_hw_common(ah);
2289 mutex_lock(&sc->lock);
2291 ATH5K_DBG(sc, ATH5K_DEBUG_RESET, "mode %d\n", sc->opmode);
2294 * Stop anything previously setup. This is safe
2295 * no matter this is the first time through or not.
2297 ath5k_stop_locked(sc);
2300 * The basic interface to setting the hardware in a good
2301 * state is ``reset''. On return the hardware is known to
2302 * be powered up and with interrupts disabled. This must
2303 * be followed by initialization of the appropriate bits
2304 * and then setup of the interrupt mask.
2306 sc->curchan = sc->hw->conf.channel;
2307 sc->curband = &sc->sbands[sc->curchan->band];
2308 sc->imask = AR5K_INT_RXOK | AR5K_INT_RXERR | AR5K_INT_RXEOL |
2309 AR5K_INT_RXORN | AR5K_INT_TXDESC | AR5K_INT_TXEOL |
2310 AR5K_INT_FATAL | AR5K_INT_GLOBAL | AR5K_INT_MIB;
2312 ret = ath5k_reset(sc, NULL);
2316 ath5k_rfkill_hw_start(ah);
2319 * Reset the key cache since some parts do not reset the
2320 * contents on initial power up or resume from suspend.
2322 for (i = 0; i < common->keymax; i++)
2323 ath_hw_keyreset(common, (u16) i);
2325 ath5k_hw_set_ack_bitrate_high(ah, true);
2329 mutex_unlock(&sc->lock);
2331 ieee80211_queue_delayed_work(sc->hw, &sc->tx_complete_work,
2332 msecs_to_jiffies(ATH5K_TX_COMPLETE_POLL_INT));
2337 static void stop_tasklets(struct ath5k_softc *sc)
2339 tasklet_kill(&sc->rxtq);
2340 tasklet_kill(&sc->txtq);
2341 tasklet_kill(&sc->calib);
2342 tasklet_kill(&sc->beacontq);
2343 tasklet_kill(&sc->ani_tasklet);
2347 * Stop the device, grabbing the top-level lock to protect
2348 * against concurrent entry through ath5k_init (which can happen
2349 * if another thread does a system call and the thread doing the
2350 * stop is preempted).
2353 ath5k_stop_hw(struct ath5k_softc *sc)
2357 mutex_lock(&sc->lock);
2358 ret = ath5k_stop_locked(sc);
2359 if (ret == 0 && !test_bit(ATH_STAT_INVALID, sc->status)) {
2361 * Don't set the card in full sleep mode!
2363 * a) When the device is in this state it must be carefully
2364 * woken up or references to registers in the PCI clock
2365 * domain may freeze the bus (and system). This varies
2366 * by chip and is mostly an issue with newer parts
2367 * (madwifi sources mentioned srev >= 0x78) that go to
2368 * sleep more quickly.
2370 * b) On older chips full sleep results a weird behaviour
2371 * during wakeup. I tested various cards with srev < 0x78
2372 * and they don't wake up after module reload, a second
2373 * module reload is needed to bring the card up again.
2375 * Until we figure out what's going on don't enable
2376 * full chip reset on any chip (this is what Legacy HAL
2377 * and Sam's HAL do anyway). Instead Perform a full reset
2378 * on the device (same as initial state after attach) and
2379 * leave it idle (keep MAC/BB on warm reset) */
2380 ret = ath5k_hw_on_hold(sc->ah);
2382 ATH5K_DBG(sc, ATH5K_DEBUG_RESET,
2383 "putting device to sleep\n");
2385 ath5k_txbuf_free_skb(sc, sc->bbuf);
2388 mutex_unlock(&sc->lock);
2392 cancel_delayed_work_sync(&sc->tx_complete_work);
2394 ath5k_rfkill_hw_stop(sc->ah);
2400 * Reset the hardware. If chan is not NULL, then also pause rx/tx
2401 * and change to the given channel.
2403 * This should be called with sc->lock.
2406 ath5k_reset(struct ath5k_softc *sc, struct ieee80211_channel *chan)
2408 struct ath5k_hw *ah = sc->ah;
2411 ATH5K_DBG(sc, ATH5K_DEBUG_RESET, "resetting\n");
2413 ath5k_hw_set_imr(ah, 0);
2414 synchronize_irq(sc->pdev->irq);
2418 ath5k_txq_cleanup(sc);
2422 sc->curband = &sc->sbands[chan->band];
2424 ret = ath5k_hw_reset(ah, sc->opmode, sc->curchan, chan != NULL);
2426 ATH5K_ERR(sc, "can't reset hardware (%d)\n", ret);
2430 ret = ath5k_rx_start(sc);
2432 ATH5K_ERR(sc, "can't start recv logic\n");
2436 ath5k_ani_init(ah, ah->ah_sc->ani_state.ani_mode);
2438 ah->ah_cal_next_full = jiffies;
2439 ah->ah_cal_next_ani = jiffies;
2440 ah->ah_cal_next_nf = jiffies;
2443 * Change channels and update the h/w rate map if we're switching;
2444 * e.g. 11a to 11b/g.
2446 * We may be doing a reset in response to an ioctl that changes the
2447 * channel so update any state that might change as a result.
2451 /* ath5k_chan_change(sc, c); */
2453 ath5k_beacon_config(sc);
2454 /* intrs are enabled by ath5k_beacon_config */
2456 ieee80211_wake_queues(sc->hw);
2463 static void ath5k_reset_work(struct work_struct *work)
2465 struct ath5k_softc *sc = container_of(work, struct ath5k_softc,
2468 mutex_lock(&sc->lock);
2469 ath5k_reset(sc, sc->curchan);
2470 mutex_unlock(&sc->lock);
2474 ath5k_attach(struct pci_dev *pdev, struct ieee80211_hw *hw)
2476 struct ath5k_softc *sc = hw->priv;
2477 struct ath5k_hw *ah = sc->ah;
2478 struct ath_regulatory *regulatory = ath5k_hw_regulatory(ah);
2479 struct ath5k_txq *txq;
2480 u8 mac[ETH_ALEN] = {};
2483 ATH5K_DBG(sc, ATH5K_DEBUG_ANY, "devid 0x%x\n", pdev->device);
2486 * Check if the MAC has multi-rate retry support.
2487 * We do this by trying to setup a fake extended
2488 * descriptor. MACs that don't have support will
2489 * return false w/o doing anything. MACs that do
2490 * support it will return true w/o doing anything.
2492 ret = ath5k_hw_setup_mrr_tx_desc(ah, NULL, 0, 0, 0, 0, 0, 0);
2497 __set_bit(ATH_STAT_MRRETRY, sc->status);
2500 * Collect the channel list. The 802.11 layer
2501 * is resposible for filtering this list based
2502 * on settings like the phy mode and regulatory
2503 * domain restrictions.
2505 ret = ath5k_setup_bands(hw);
2507 ATH5K_ERR(sc, "can't get channels\n");
2511 /* NB: setup here so ath5k_rate_update is happy */
2512 if (test_bit(AR5K_MODE_11A, ah->ah_modes))
2513 ath5k_setcurmode(sc, AR5K_MODE_11A);
2515 ath5k_setcurmode(sc, AR5K_MODE_11B);
2518 * Allocate tx+rx descriptors and populate the lists.
2520 ret = ath5k_desc_alloc(sc, pdev);
2522 ATH5K_ERR(sc, "can't allocate descriptors\n");
2527 * Allocate hardware transmit queues: one queue for
2528 * beacon frames and one data queue for each QoS
2529 * priority. Note that hw functions handle resetting
2530 * these queues at the needed time.
2532 ret = ath5k_beaconq_setup(ah);
2534 ATH5K_ERR(sc, "can't setup a beacon xmit queue\n");
2538 sc->cabq = ath5k_txq_setup(sc, AR5K_TX_QUEUE_CAB, 0);
2539 if (IS_ERR(sc->cabq)) {
2540 ATH5K_ERR(sc, "can't setup cab queue\n");
2541 ret = PTR_ERR(sc->cabq);
2545 /* This order matches mac80211's queue priority, so we can
2546 * directly use the mac80211 queue number without any mapping */
2547 txq = ath5k_txq_setup(sc, AR5K_TX_QUEUE_DATA, AR5K_WME_AC_VO);
2549 ATH5K_ERR(sc, "can't setup xmit queue\n");
2553 txq = ath5k_txq_setup(sc, AR5K_TX_QUEUE_DATA, AR5K_WME_AC_VI);
2555 ATH5K_ERR(sc, "can't setup xmit queue\n");
2559 txq = ath5k_txq_setup(sc, AR5K_TX_QUEUE_DATA, AR5K_WME_AC_BE);
2561 ATH5K_ERR(sc, "can't setup xmit queue\n");
2565 txq = ath5k_txq_setup(sc, AR5K_TX_QUEUE_DATA, AR5K_WME_AC_BK);
2567 ATH5K_ERR(sc, "can't setup xmit queue\n");
2573 tasklet_init(&sc->rxtq, ath5k_tasklet_rx, (unsigned long)sc);
2574 tasklet_init(&sc->txtq, ath5k_tasklet_tx, (unsigned long)sc);
2575 tasklet_init(&sc->calib, ath5k_tasklet_calibrate, (unsigned long)sc);
2576 tasklet_init(&sc->beacontq, ath5k_tasklet_beacon, (unsigned long)sc);
2577 tasklet_init(&sc->ani_tasklet, ath5k_tasklet_ani, (unsigned long)sc);
2579 INIT_WORK(&sc->reset_work, ath5k_reset_work);
2580 INIT_DELAYED_WORK(&sc->tx_complete_work, ath5k_tx_complete_poll_work);
2582 ret = ath5k_eeprom_read_mac(ah, mac);
2584 ATH5K_ERR(sc, "unable to read address from EEPROM: 0x%04x\n",
2589 SET_IEEE80211_PERM_ADDR(hw, mac);
2590 /* All MAC address bits matter for ACKs */
2591 memcpy(sc->bssidmask, ath_bcast_mac, ETH_ALEN);
2592 ath5k_hw_set_bssid_mask(sc->ah, sc->bssidmask);
2594 regulatory->current_rd = ah->ah_capabilities.cap_eeprom.ee_regdomain;
2595 ret = ath_regd_init(regulatory, hw->wiphy, ath5k_reg_notifier);
2597 ATH5K_ERR(sc, "can't initialize regulatory system\n");
2601 ret = ieee80211_register_hw(hw);
2603 ATH5K_ERR(sc, "can't register ieee80211 hw\n");
2607 if (!ath_is_world_regd(regulatory))
2608 regulatory_hint(hw->wiphy, regulatory->alpha2);
2610 ath5k_init_leds(sc);
2612 ath5k_sysfs_register(sc);
2616 ath5k_txq_release(sc);
2618 ath5k_hw_release_tx_queue(ah, sc->bhalq);
2620 ath5k_desc_free(sc, pdev);
2626 ath5k_detach(struct pci_dev *pdev, struct ieee80211_hw *hw)
2628 struct ath5k_softc *sc = hw->priv;
2631 * NB: the order of these is important:
2632 * o call the 802.11 layer before detaching ath5k_hw to
2633 * ensure callbacks into the driver to delete global
2634 * key cache entries can be handled
2635 * o reclaim the tx queue data structures after calling
2636 * the 802.11 layer as we'll get called back to reclaim
2637 * node state and potentially want to use them
2638 * o to cleanup the tx queues the hal is called, so detach
2640 * XXX: ??? detach ath5k_hw ???
2641 * Other than that, it's straightforward...
2643 ieee80211_unregister_hw(hw);
2644 ath5k_desc_free(sc, pdev);
2645 ath5k_txq_release(sc);
2646 ath5k_hw_release_tx_queue(sc->ah, sc->bhalq);
2647 ath5k_unregister_leds(sc);
2649 ath5k_sysfs_unregister(sc);
2651 * NB: can't reclaim these until after ieee80211_ifdetach
2652 * returns because we'll get called back to reclaim node
2653 * state and potentially want to use them.
2657 /********************\
2658 * Mac80211 functions *
2659 \********************/
2662 ath5k_tx(struct ieee80211_hw *hw, struct sk_buff *skb)
2664 struct ath5k_softc *sc = hw->priv;
2665 u16 qnum = skb_get_queue_mapping(skb);
2667 if (WARN_ON(qnum >= sc->ah->ah_capabilities.cap_queues.q_tx_num)) {
2668 dev_kfree_skb_any(skb);
2672 return ath5k_tx_queue(hw, skb, &sc->txqs[qnum]);
2675 static int ath5k_start(struct ieee80211_hw *hw)
2677 return ath5k_init(hw->priv);
2680 static void ath5k_stop(struct ieee80211_hw *hw)
2682 ath5k_stop_hw(hw->priv);
2685 static int ath5k_add_interface(struct ieee80211_hw *hw,
2686 struct ieee80211_vif *vif)
2688 struct ath5k_softc *sc = hw->priv;
2691 mutex_lock(&sc->lock);
2699 switch (vif->type) {
2700 case NL80211_IFTYPE_AP:
2701 case NL80211_IFTYPE_STATION:
2702 case NL80211_IFTYPE_ADHOC:
2703 case NL80211_IFTYPE_MESH_POINT:
2704 sc->opmode = vif->type;
2711 ATH5K_DBG(sc, ATH5K_DEBUG_MODE, "add interface mode %d\n", sc->opmode);
2713 ath5k_hw_set_lladdr(sc->ah, vif->addr);
2714 ath5k_mode_setup(sc);
2718 mutex_unlock(&sc->lock);
2723 ath5k_remove_interface(struct ieee80211_hw *hw,
2724 struct ieee80211_vif *vif)
2726 struct ath5k_softc *sc = hw->priv;
2727 u8 mac[ETH_ALEN] = {};
2729 mutex_lock(&sc->lock);
2733 ath5k_hw_set_lladdr(sc->ah, mac);
2736 mutex_unlock(&sc->lock);
2740 * TODO: Phy disable/diversity etc
2743 ath5k_config(struct ieee80211_hw *hw, u32 changed)
2745 struct ath5k_softc *sc = hw->priv;
2746 struct ath5k_hw *ah = sc->ah;
2747 struct ieee80211_conf *conf = &hw->conf;
2750 mutex_lock(&sc->lock);
2752 if (changed & IEEE80211_CONF_CHANGE_CHANNEL) {
2753 ret = ath5k_chan_set(sc, conf->channel);
2758 if ((changed & IEEE80211_CONF_CHANGE_POWER) &&
2759 (sc->power_level != conf->power_level)) {
2760 sc->power_level = conf->power_level;
2763 ath5k_hw_set_txpower_limit(ah, (conf->power_level * 2));
2767 * 1) Move this on config_interface and handle each case
2768 * separately eg. when we have only one STA vif, use
2769 * AR5K_ANTMODE_SINGLE_AP
2771 * 2) Allow the user to change antenna mode eg. when only
2772 * one antenna is present
2774 * 3) Allow the user to set default/tx antenna when possible
2776 * 4) Default mode should handle 90% of the cases, together
2777 * with fixed a/b and single AP modes we should be able to
2778 * handle 99%. Sectored modes are extreme cases and i still
2779 * haven't found a usage for them. If we decide to support them,
2780 * then we must allow the user to set how many tx antennas we
2783 ath5k_hw_set_antenna_mode(ah, ah->ah_ant_mode);
2786 mutex_unlock(&sc->lock);
2790 static u64 ath5k_prepare_multicast(struct ieee80211_hw *hw,
2791 struct netdev_hw_addr_list *mc_list)
2795 struct netdev_hw_addr *ha;
2800 netdev_hw_addr_list_for_each(ha, mc_list) {
2801 /* calculate XOR of eight 6-bit values */
2802 val = get_unaligned_le32(ha->addr + 0);
2803 pos = (val >> 18) ^ (val >> 12) ^ (val >> 6) ^ val;
2804 val = get_unaligned_le32(ha->addr + 3);
2805 pos ^= (val >> 18) ^ (val >> 12) ^ (val >> 6) ^ val;
2807 mfilt[pos / 32] |= (1 << (pos % 32));
2808 /* XXX: we might be able to just do this instead,
2809 * but not sure, needs testing, if we do use this we'd
2810 * neet to inform below to not reset the mcast */
2811 /* ath5k_hw_set_mcast_filterindex(ah,
2815 return ((u64)(mfilt[1]) << 32) | mfilt[0];
2818 #define SUPPORTED_FIF_FLAGS \
2819 FIF_PROMISC_IN_BSS | FIF_ALLMULTI | FIF_FCSFAIL | \
2820 FIF_PLCPFAIL | FIF_CONTROL | FIF_OTHER_BSS | \
2821 FIF_BCN_PRBRESP_PROMISC
2823 * o always accept unicast, broadcast, and multicast traffic
2824 * o multicast traffic for all BSSIDs will be enabled if mac80211
2826 * o maintain current state of phy ofdm or phy cck error reception.
2827 * If the hardware detects any of these type of errors then
2828 * ath5k_hw_get_rx_filter() will pass to us the respective
2829 * hardware filters to be able to receive these type of frames.
2830 * o probe request frames are accepted only when operating in
2831 * hostap, adhoc, or monitor modes
2832 * o enable promiscuous mode according to the interface state
2834 * - when operating in adhoc mode so the 802.11 layer creates
2835 * node table entries for peers,
2836 * - when operating in station mode for collecting rssi data when
2837 * the station is otherwise quiet, or
2840 static void ath5k_configure_filter(struct ieee80211_hw *hw,
2841 unsigned int changed_flags,
2842 unsigned int *new_flags,
2845 struct ath5k_softc *sc = hw->priv;
2846 struct ath5k_hw *ah = sc->ah;
2847 u32 mfilt[2], rfilt;
2849 mutex_lock(&sc->lock);
2851 mfilt[0] = multicast;
2852 mfilt[1] = multicast >> 32;
2854 /* Only deal with supported flags */
2855 changed_flags &= SUPPORTED_FIF_FLAGS;
2856 *new_flags &= SUPPORTED_FIF_FLAGS;
2858 /* If HW detects any phy or radar errors, leave those filters on.
2859 * Also, always enable Unicast, Broadcasts and Multicast
2860 * XXX: move unicast, bssid broadcasts and multicast to mac80211 */
2861 rfilt = (ath5k_hw_get_rx_filter(ah) & (AR5K_RX_FILTER_PHYERR)) |
2862 (AR5K_RX_FILTER_UCAST | AR5K_RX_FILTER_BCAST |
2863 AR5K_RX_FILTER_MCAST);
2865 if (changed_flags & (FIF_PROMISC_IN_BSS | FIF_OTHER_BSS)) {
2866 if (*new_flags & FIF_PROMISC_IN_BSS) {
2867 __set_bit(ATH_STAT_PROMISC, sc->status);
2869 __clear_bit(ATH_STAT_PROMISC, sc->status);
2873 if (test_bit(ATH_STAT_PROMISC, sc->status))
2874 rfilt |= AR5K_RX_FILTER_PROM;
2876 /* Note, AR5K_RX_FILTER_MCAST is already enabled */
2877 if (*new_flags & FIF_ALLMULTI) {
2882 /* This is the best we can do */
2883 if (*new_flags & (FIF_FCSFAIL | FIF_PLCPFAIL))
2884 rfilt |= AR5K_RX_FILTER_PHYERR;
2886 /* FIF_BCN_PRBRESP_PROMISC really means to enable beacons
2887 * and probes for any BSSID */
2888 if (*new_flags & FIF_BCN_PRBRESP_PROMISC)
2889 rfilt |= AR5K_RX_FILTER_BEACON;
2891 /* FIF_CONTROL doc says that if FIF_PROMISC_IN_BSS is not
2892 * set we should only pass on control frames for this
2893 * station. This needs testing. I believe right now this
2894 * enables *all* control frames, which is OK.. but
2895 * but we should see if we can improve on granularity */
2896 if (*new_flags & FIF_CONTROL)
2897 rfilt |= AR5K_RX_FILTER_CONTROL;
2899 /* Additional settings per mode -- this is per ath5k */
2901 /* XXX move these to mac80211, and add a beacon IFF flag to mac80211 */
2903 switch (sc->opmode) {
2904 case NL80211_IFTYPE_MESH_POINT:
2905 rfilt |= AR5K_RX_FILTER_CONTROL |
2906 AR5K_RX_FILTER_BEACON |
2907 AR5K_RX_FILTER_PROBEREQ |
2908 AR5K_RX_FILTER_PROM;
2910 case NL80211_IFTYPE_AP:
2911 case NL80211_IFTYPE_ADHOC:
2912 rfilt |= AR5K_RX_FILTER_PROBEREQ |
2913 AR5K_RX_FILTER_BEACON;
2915 case NL80211_IFTYPE_STATION:
2917 rfilt |= AR5K_RX_FILTER_BEACON;
2923 ath5k_hw_set_rx_filter(ah, rfilt);
2925 /* Set multicast bits */
2926 ath5k_hw_set_mcast_filter(ah, mfilt[0], mfilt[1]);
2927 /* Set the cached hw filter flags, this will later actually
2929 sc->filter_flags = rfilt;
2931 mutex_unlock(&sc->lock);
2935 ath5k_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd,
2936 struct ieee80211_vif *vif, struct ieee80211_sta *sta,
2937 struct ieee80211_key_conf *key)
2939 struct ath5k_softc *sc = hw->priv;
2940 struct ath5k_hw *ah = sc->ah;
2941 struct ath_common *common = ath5k_hw_common(ah);
2944 if (modparam_nohwcrypt)
2947 switch (key->cipher) {
2948 case WLAN_CIPHER_SUITE_WEP40:
2949 case WLAN_CIPHER_SUITE_WEP104:
2950 case WLAN_CIPHER_SUITE_TKIP:
2952 case WLAN_CIPHER_SUITE_CCMP:
2953 if (common->crypt_caps & ATH_CRYPT_CAP_CIPHER_AESCCM)
2961 mutex_lock(&sc->lock);
2965 ret = ath_key_config(common, vif, sta, key);
2967 key->hw_key_idx = ret;
2968 /* push IV and Michael MIC generation to stack */
2969 key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV;
2970 if (key->cipher == WLAN_CIPHER_SUITE_TKIP)
2971 key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC;
2972 if (key->cipher == WLAN_CIPHER_SUITE_CCMP)
2973 key->flags |= IEEE80211_KEY_FLAG_SW_MGMT;
2978 ath_key_delete(common, key);
2985 mutex_unlock(&sc->lock);
2990 ath5k_get_stats(struct ieee80211_hw *hw,
2991 struct ieee80211_low_level_stats *stats)
2993 struct ath5k_softc *sc = hw->priv;
2996 ath5k_hw_update_mib_counters(sc->ah);
2998 stats->dot11ACKFailureCount = sc->stats.ack_fail;
2999 stats->dot11RTSFailureCount = sc->stats.rts_fail;
3000 stats->dot11RTSSuccessCount = sc->stats.rts_ok;
3001 stats->dot11FCSErrorCount = sc->stats.fcs_error;
3006 static int ath5k_get_survey(struct ieee80211_hw *hw, int idx,
3007 struct survey_info *survey)
3009 struct ath5k_softc *sc = hw->priv;
3010 struct ieee80211_conf *conf = &hw->conf;
3015 survey->channel = conf->channel;
3016 survey->filled = SURVEY_INFO_NOISE_DBM;
3017 survey->noise = sc->ah->ah_noise_floor;
3023 ath5k_get_tsf(struct ieee80211_hw *hw)
3025 struct ath5k_softc *sc = hw->priv;
3027 return ath5k_hw_get_tsf64(sc->ah);
3031 ath5k_set_tsf(struct ieee80211_hw *hw, u64 tsf)
3033 struct ath5k_softc *sc = hw->priv;
3035 ath5k_hw_set_tsf64(sc->ah, tsf);
3039 ath5k_reset_tsf(struct ieee80211_hw *hw)
3041 struct ath5k_softc *sc = hw->priv;
3044 * in IBSS mode we need to update the beacon timers too.
3045 * this will also reset the TSF if we call it with 0
3047 if (sc->opmode == NL80211_IFTYPE_ADHOC)
3048 ath5k_beacon_update_timers(sc, 0);
3050 ath5k_hw_reset_tsf(sc->ah);
3054 set_beacon_filter(struct ieee80211_hw *hw, bool enable)
3056 struct ath5k_softc *sc = hw->priv;
3057 struct ath5k_hw *ah = sc->ah;
3059 rfilt = ath5k_hw_get_rx_filter(ah);
3061 rfilt |= AR5K_RX_FILTER_BEACON;
3063 rfilt &= ~AR5K_RX_FILTER_BEACON;
3064 ath5k_hw_set_rx_filter(ah, rfilt);
3065 sc->filter_flags = rfilt;
3068 static void ath5k_bss_info_changed(struct ieee80211_hw *hw,
3069 struct ieee80211_vif *vif,
3070 struct ieee80211_bss_conf *bss_conf,
3073 struct ath5k_softc *sc = hw->priv;
3074 struct ath5k_hw *ah = sc->ah;
3075 struct ath_common *common = ath5k_hw_common(ah);
3076 unsigned long flags;
3078 mutex_lock(&sc->lock);
3079 if (WARN_ON(sc->vif != vif))
3082 if (changes & BSS_CHANGED_BSSID) {
3083 /* Cache for later use during resets */
3084 memcpy(common->curbssid, bss_conf->bssid, ETH_ALEN);
3086 ath5k_hw_set_bssid(ah);
3090 if (changes & BSS_CHANGED_BEACON_INT)
3091 sc->bintval = bss_conf->beacon_int;
3093 if (changes & BSS_CHANGED_ASSOC) {
3094 sc->assoc = bss_conf->assoc;
3095 if (sc->opmode == NL80211_IFTYPE_STATION)
3096 set_beacon_filter(hw, sc->assoc);
3097 ath5k_hw_set_ledstate(sc->ah, sc->assoc ?
3098 AR5K_LED_ASSOC : AR5K_LED_INIT);
3099 if (bss_conf->assoc) {
3100 ATH5K_DBG(sc, ATH5K_DEBUG_ANY,
3101 "Bss Info ASSOC %d, bssid: %pM\n",
3102 bss_conf->aid, common->curbssid);
3103 common->curaid = bss_conf->aid;
3104 ath5k_hw_set_bssid(ah);
3105 /* Once ANI is available you would start it here */
3109 if (changes & BSS_CHANGED_BEACON) {
3110 spin_lock_irqsave(&sc->block, flags);
3111 ath5k_beacon_update(hw, vif);
3112 spin_unlock_irqrestore(&sc->block, flags);
3115 if (changes & BSS_CHANGED_BEACON_ENABLED)
3116 sc->enable_beacon = bss_conf->enable_beacon;
3118 if (changes & (BSS_CHANGED_BEACON | BSS_CHANGED_BEACON_ENABLED |
3119 BSS_CHANGED_BEACON_INT))
3120 ath5k_beacon_config(sc);
3123 mutex_unlock(&sc->lock);
3126 static void ath5k_sw_scan_start(struct ieee80211_hw *hw)
3128 struct ath5k_softc *sc = hw->priv;
3130 ath5k_hw_set_ledstate(sc->ah, AR5K_LED_SCAN);
3133 static void ath5k_sw_scan_complete(struct ieee80211_hw *hw)
3135 struct ath5k_softc *sc = hw->priv;
3136 ath5k_hw_set_ledstate(sc->ah, sc->assoc ?
3137 AR5K_LED_ASSOC : AR5K_LED_INIT);
3141 * ath5k_set_coverage_class - Set IEEE 802.11 coverage class
3143 * @hw: struct ieee80211_hw pointer
3144 * @coverage_class: IEEE 802.11 coverage class number
3146 * Mac80211 callback. Sets slot time, ACK timeout and CTS timeout for given
3147 * coverage class. The values are persistent, they are restored after device
3150 static void ath5k_set_coverage_class(struct ieee80211_hw *hw, u8 coverage_class)
3152 struct ath5k_softc *sc = hw->priv;
3154 mutex_lock(&sc->lock);
3155 ath5k_hw_set_coverage_class(sc->ah, coverage_class);
3156 mutex_unlock(&sc->lock);
3159 static int ath5k_conf_tx(struct ieee80211_hw *hw, u16 queue,
3160 const struct ieee80211_tx_queue_params *params)
3162 struct ath5k_softc *sc = hw->priv;
3163 struct ath5k_hw *ah = sc->ah;
3164 struct ath5k_txq_info qi;
3167 if (queue >= ah->ah_capabilities.cap_queues.q_tx_num)
3170 mutex_lock(&sc->lock);
3172 ath5k_hw_get_tx_queueprops(ah, queue, &qi);
3174 qi.tqi_aifs = params->aifs;
3175 qi.tqi_cw_min = params->cw_min;
3176 qi.tqi_cw_max = params->cw_max;
3177 qi.tqi_burst_time = params->txop;
3179 ATH5K_DBG(sc, ATH5K_DEBUG_ANY,
3180 "Configure tx [queue %d], "
3181 "aifs: %d, cw_min: %d, cw_max: %d, txop: %d\n",
3182 queue, params->aifs, params->cw_min,
3183 params->cw_max, params->txop);
3185 if (ath5k_hw_set_tx_queueprops(ah, queue, &qi)) {
3187 "Unable to update hardware queue %u!\n", queue);
3190 ath5k_hw_reset_tx_queue(ah, queue);
3192 mutex_unlock(&sc->lock);
3197 static const struct ieee80211_ops ath5k_hw_ops = {
3199 .start = ath5k_start,
3201 .add_interface = ath5k_add_interface,
3202 .remove_interface = ath5k_remove_interface,
3203 .config = ath5k_config,
3204 .prepare_multicast = ath5k_prepare_multicast,
3205 .configure_filter = ath5k_configure_filter,
3206 .set_key = ath5k_set_key,
3207 .get_stats = ath5k_get_stats,
3208 .get_survey = ath5k_get_survey,
3209 .conf_tx = ath5k_conf_tx,
3210 .get_tsf = ath5k_get_tsf,
3211 .set_tsf = ath5k_set_tsf,
3212 .reset_tsf = ath5k_reset_tsf,
3213 .bss_info_changed = ath5k_bss_info_changed,
3214 .sw_scan_start = ath5k_sw_scan_start,
3215 .sw_scan_complete = ath5k_sw_scan_complete,
3216 .set_coverage_class = ath5k_set_coverage_class,
3219 /********************\
3220 * PCI Initialization *
3221 \********************/
3223 static int __devinit
3224 ath5k_pci_probe(struct pci_dev *pdev,
3225 const struct pci_device_id *id)
3228 struct ath5k_softc *sc;
3229 struct ath_common *common;
3230 struct ieee80211_hw *hw;
3235 * L0s needs to be disabled on all ath5k cards.
3237 * For distributions shipping with CONFIG_PCIEASPM (this will be enabled
3238 * by default in the future in 2.6.36) this will also mean both L1 and
3239 * L0s will be disabled when a pre 1.1 PCIe device is detected. We do
3240 * know L1 works correctly even for all ath5k pre 1.1 PCIe devices
3241 * though but cannot currently undue the effect of a blacklist, for
3242 * details you can read pcie_aspm_sanity_check() and see how it adjusts
3243 * the device link capability.
3245 * It may be possible in the future to implement some PCI API to allow
3246 * drivers to override blacklists for pre 1.1 PCIe but for now it is
3247 * best to accept that both L0s and L1 will be disabled completely for
3248 * distributions shipping with CONFIG_PCIEASPM rather than having this
3249 * issue present. Motivation for adding this new API will be to help
3250 * with power consumption for some of these devices.
3252 pci_disable_link_state(pdev, PCIE_LINK_STATE_L0S);
3254 ret = pci_enable_device(pdev);
3256 dev_err(&pdev->dev, "can't enable device\n");
3260 /* XXX 32-bit addressing only */
3261 ret = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
3263 dev_err(&pdev->dev, "32-bit DMA not available\n");
3268 * Cache line size is used to size and align various
3269 * structures used to communicate with the hardware.
3271 pci_read_config_byte(pdev, PCI_CACHE_LINE_SIZE, &csz);
3274 * Linux 2.4.18 (at least) writes the cache line size
3275 * register as a 16-bit wide register which is wrong.
3276 * We must have this setup properly for rx buffer
3277 * DMA to work so force a reasonable value here if it
3280 csz = L1_CACHE_BYTES >> 2;
3281 pci_write_config_byte(pdev, PCI_CACHE_LINE_SIZE, csz);
3284 * The default setting of latency timer yields poor results,
3285 * set it to the value used by other systems. It may be worth
3286 * tweaking this setting more.
3288 pci_write_config_byte(pdev, PCI_LATENCY_TIMER, 0xa8);
3290 /* Enable bus mastering */
3291 pci_set_master(pdev);
3294 * Disable the RETRY_TIMEOUT register (0x41) to keep
3295 * PCI Tx retries from interfering with C3 CPU state.
3297 pci_write_config_byte(pdev, 0x41, 0);
3299 ret = pci_request_region(pdev, 0, "ath5k");
3301 dev_err(&pdev->dev, "cannot reserve PCI memory region\n");
3305 mem = pci_iomap(pdev, 0, 0);
3307 dev_err(&pdev->dev, "cannot remap PCI memory region\n") ;
3313 * Allocate hw (mac80211 main struct)
3314 * and hw->priv (driver private data)
3316 hw = ieee80211_alloc_hw(sizeof(*sc), &ath5k_hw_ops);
3318 dev_err(&pdev->dev, "cannot allocate ieee80211_hw\n");
3323 dev_info(&pdev->dev, "registered as '%s'\n", wiphy_name(hw->wiphy));
3325 /* Initialize driver private data */
3326 SET_IEEE80211_DEV(hw, &pdev->dev);
3327 hw->flags = IEEE80211_HW_RX_INCLUDES_FCS |
3328 IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING |
3329 IEEE80211_HW_SIGNAL_DBM;
3331 hw->wiphy->interface_modes =
3332 BIT(NL80211_IFTYPE_AP) |
3333 BIT(NL80211_IFTYPE_STATION) |
3334 BIT(NL80211_IFTYPE_ADHOC) |
3335 BIT(NL80211_IFTYPE_MESH_POINT);
3337 hw->extra_tx_headroom = 2;
3338 hw->channel_change_time = 5000;
3343 ath5k_debug_init_device(sc);
3346 * Mark the device as detached to avoid processing
3347 * interrupts until setup is complete.
3349 __set_bit(ATH_STAT_INVALID, sc->status);
3351 sc->iobase = mem; /* So we can unmap it on detach */
3352 sc->opmode = NL80211_IFTYPE_STATION;
3354 mutex_init(&sc->lock);
3355 spin_lock_init(&sc->rxbuflock);
3356 spin_lock_init(&sc->txbuflock);
3357 spin_lock_init(&sc->block);
3359 /* Set private data */
3360 pci_set_drvdata(pdev, sc);
3362 /* Setup interrupt handler */
3363 ret = request_irq(pdev->irq, ath5k_intr, IRQF_SHARED, "ath", sc);
3365 ATH5K_ERR(sc, "request_irq failed\n");
3369 /* If we passed the test, malloc an ath5k_hw struct */
3370 sc->ah = kzalloc(sizeof(struct ath5k_hw), GFP_KERNEL);
3373 ATH5K_ERR(sc, "out of memory\n");
3378 sc->ah->ah_iobase = sc->iobase;
3379 common = ath5k_hw_common(sc->ah);
3380 common->ops = &ath5k_common_ops;
3381 common->ah = sc->ah;
3383 common->cachelsz = csz << 2; /* convert to bytes */
3385 /* Initialize device */
3386 ret = ath5k_hw_attach(sc);
3391 /* set up multi-rate retry capabilities */
3392 if (sc->ah->ah_version == AR5K_AR5212) {
3394 hw->max_rate_tries = 11;
3397 /* Finish private driver data initialization */
3398 ret = ath5k_attach(pdev, hw);
3402 ATH5K_INFO(sc, "Atheros AR%s chip found (MAC: 0x%x, PHY: 0x%x)\n",
3403 ath5k_chip_name(AR5K_VERSION_MAC, sc->ah->ah_mac_srev),
3404 sc->ah->ah_mac_srev,
3405 sc->ah->ah_phy_revision);
3407 if (!sc->ah->ah_single_chip) {
3408 /* Single chip radio (!RF5111) */
3409 if (sc->ah->ah_radio_5ghz_revision &&
3410 !sc->ah->ah_radio_2ghz_revision) {
3411 /* No 5GHz support -> report 2GHz radio */
3412 if (!test_bit(AR5K_MODE_11A,
3413 sc->ah->ah_capabilities.cap_mode)) {
3414 ATH5K_INFO(sc, "RF%s 2GHz radio found (0x%x)\n",
3415 ath5k_chip_name(AR5K_VERSION_RAD,
3416 sc->ah->ah_radio_5ghz_revision),
3417 sc->ah->ah_radio_5ghz_revision);
3418 /* No 2GHz support (5110 and some
3419 * 5Ghz only cards) -> report 5Ghz radio */
3420 } else if (!test_bit(AR5K_MODE_11B,
3421 sc->ah->ah_capabilities.cap_mode)) {
3422 ATH5K_INFO(sc, "RF%s 5GHz radio found (0x%x)\n",
3423 ath5k_chip_name(AR5K_VERSION_RAD,
3424 sc->ah->ah_radio_5ghz_revision),
3425 sc->ah->ah_radio_5ghz_revision);
3426 /* Multiband radio */
3428 ATH5K_INFO(sc, "RF%s multiband radio found"
3430 ath5k_chip_name(AR5K_VERSION_RAD,
3431 sc->ah->ah_radio_5ghz_revision),
3432 sc->ah->ah_radio_5ghz_revision);
3435 /* Multi chip radio (RF5111 - RF2111) ->
3436 * report both 2GHz/5GHz radios */
3437 else if (sc->ah->ah_radio_5ghz_revision &&
3438 sc->ah->ah_radio_2ghz_revision){
3439 ATH5K_INFO(sc, "RF%s 5GHz radio found (0x%x)\n",
3440 ath5k_chip_name(AR5K_VERSION_RAD,
3441 sc->ah->ah_radio_5ghz_revision),
3442 sc->ah->ah_radio_5ghz_revision);
3443 ATH5K_INFO(sc, "RF%s 2GHz radio found (0x%x)\n",
3444 ath5k_chip_name(AR5K_VERSION_RAD,
3445 sc->ah->ah_radio_2ghz_revision),
3446 sc->ah->ah_radio_2ghz_revision);
3451 /* ready to process interrupts */
3452 __clear_bit(ATH_STAT_INVALID, sc->status);
3456 ath5k_hw_detach(sc->ah);
3460 free_irq(pdev->irq, sc);
3462 ieee80211_free_hw(hw);
3464 pci_iounmap(pdev, mem);
3466 pci_release_region(pdev, 0);
3468 pci_disable_device(pdev);
3473 static void __devexit
3474 ath5k_pci_remove(struct pci_dev *pdev)
3476 struct ath5k_softc *sc = pci_get_drvdata(pdev);
3478 ath5k_debug_finish_device(sc);
3479 ath5k_detach(pdev, sc->hw);
3480 ath5k_hw_detach(sc->ah);
3482 free_irq(pdev->irq, sc);
3483 pci_iounmap(pdev, sc->iobase);
3484 pci_release_region(pdev, 0);
3485 pci_disable_device(pdev);
3486 ieee80211_free_hw(sc->hw);
3489 #ifdef CONFIG_PM_SLEEP
3490 static int ath5k_pci_suspend(struct device *dev)
3492 struct ath5k_softc *sc = pci_get_drvdata(to_pci_dev(dev));
3498 static int ath5k_pci_resume(struct device *dev)
3500 struct pci_dev *pdev = to_pci_dev(dev);
3501 struct ath5k_softc *sc = pci_get_drvdata(pdev);
3504 * Suspend/Resume resets the PCI configuration space, so we have to
3505 * re-disable the RETRY_TIMEOUT register (0x41) to keep
3506 * PCI Tx retries from interfering with C3 CPU state
3508 pci_write_config_byte(pdev, 0x41, 0);
3510 ath5k_led_enable(sc);
3514 static SIMPLE_DEV_PM_OPS(ath5k_pm_ops, ath5k_pci_suspend, ath5k_pci_resume);
3515 #define ATH5K_PM_OPS (&ath5k_pm_ops)
3517 #define ATH5K_PM_OPS NULL
3518 #endif /* CONFIG_PM_SLEEP */
3520 static struct pci_driver ath5k_pci_driver = {
3521 .name = KBUILD_MODNAME,
3522 .id_table = ath5k_pci_id_table,
3523 .probe = ath5k_pci_probe,
3524 .remove = __devexit_p(ath5k_pci_remove),
3525 .driver.pm = ATH5K_PM_OPS,
3529 * Module init/exit functions
3532 init_ath5k_pci(void)
3538 ret = pci_register_driver(&ath5k_pci_driver);
3540 printk(KERN_ERR "ath5k_pci: can't register pci driver\n");
3548 exit_ath5k_pci(void)
3550 pci_unregister_driver(&ath5k_pci_driver);
3552 ath5k_debug_finish();
3555 module_init(init_ath5k_pci);
3556 module_exit(exit_ath5k_pci);