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fa1c114f JS |
1 | /*- |
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> | |
7 | * | |
8 | * All rights reserved. | |
9 | * | |
10 | * Redistribution and use in source and binary forms, with or without | |
11 | * modification, are permitted provided that the following conditions | |
12 | * are met: | |
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. | |
23 | * | |
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. | |
27 | * | |
28 | * NO WARRANTY | |
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. | |
40 | * | |
41 | */ | |
42 | ||
fa1c114f JS |
43 | #include <linux/module.h> |
44 | #include <linux/delay.h> | |
274c7c36 | 45 | #include <linux/hardirq.h> |
fa1c114f | 46 | #include <linux/if.h> |
274c7c36 | 47 | #include <linux/io.h> |
fa1c114f JS |
48 | #include <linux/netdevice.h> |
49 | #include <linux/cache.h> | |
fa1c114f JS |
50 | #include <linux/ethtool.h> |
51 | #include <linux/uaccess.h> | |
5a0e3ad6 | 52 | #include <linux/slab.h> |
b1ae1edf | 53 | #include <linux/etherdevice.h> |
fa1c114f JS |
54 | |
55 | #include <net/ieee80211_radiotap.h> | |
56 | ||
57 | #include <asm/unaligned.h> | |
58 | ||
59 | #include "base.h" | |
60 | #include "reg.h" | |
61 | #include "debug.h" | |
2111ac0d | 62 | #include "ani.h" |
fa1c114f | 63 | |
0e472252 BC |
64 | #define CREATE_TRACE_POINTS |
65 | #include "trace.h" | |
66 | ||
18cb6e32 JL |
67 | int ath5k_modparam_nohwcrypt; |
68 | module_param_named(nohwcrypt, ath5k_modparam_nohwcrypt, bool, S_IRUGO); | |
9ad9a26e | 69 | MODULE_PARM_DESC(nohwcrypt, "Disable hardware encryption."); |
fa1c114f | 70 | |
42639fcd | 71 | static int modparam_all_channels; |
46802a4f | 72 | module_param_named(all_channels, modparam_all_channels, bool, S_IRUGO); |
42639fcd BC |
73 | MODULE_PARM_DESC(all_channels, "Expose all channels the device can use."); |
74 | ||
fa1c114f JS |
75 | /* Module info */ |
76 | MODULE_AUTHOR("Jiri Slaby"); | |
77 | MODULE_AUTHOR("Nick Kossifidis"); | |
78 | MODULE_DESCRIPTION("Support for 5xxx series of Atheros 802.11 wireless LAN cards."); | |
79 | MODULE_SUPPORTED_DEVICE("Atheros 5xxx WLAN cards"); | |
80 | MODULE_LICENSE("Dual BSD/GPL"); | |
fa1c114f | 81 | |
132b1c3e | 82 | static int ath5k_init(struct ieee80211_hw *hw); |
8aec7af9 NK |
83 | static int ath5k_reset(struct ath5k_softc *sc, struct ieee80211_channel *chan, |
84 | bool skip_pcu); | |
cd2c5486 BR |
85 | int ath5k_beacon_update(struct ieee80211_hw *hw, struct ieee80211_vif *vif); |
86 | void ath5k_beacon_update_timers(struct ath5k_softc *sc, u64 bc_tsf); | |
fa1c114f | 87 | |
fa1c114f | 88 | /* Known SREVs */ |
2c91108c | 89 | static const struct ath5k_srev_name srev_names[] = { |
a0b907ee FF |
90 | #ifdef CONFIG_ATHEROS_AR231X |
91 | { "5312", AR5K_VERSION_MAC, AR5K_SREV_AR5312_R2 }, | |
92 | { "5312", AR5K_VERSION_MAC, AR5K_SREV_AR5312_R7 }, | |
93 | { "2313", AR5K_VERSION_MAC, AR5K_SREV_AR2313_R8 }, | |
94 | { "2315", AR5K_VERSION_MAC, AR5K_SREV_AR2315_R6 }, | |
95 | { "2315", AR5K_VERSION_MAC, AR5K_SREV_AR2315_R7 }, | |
96 | { "2317", AR5K_VERSION_MAC, AR5K_SREV_AR2317_R1 }, | |
97 | { "2317", AR5K_VERSION_MAC, AR5K_SREV_AR2317_R2 }, | |
98 | #else | |
1bef016a NK |
99 | { "5210", AR5K_VERSION_MAC, AR5K_SREV_AR5210 }, |
100 | { "5311", AR5K_VERSION_MAC, AR5K_SREV_AR5311 }, | |
101 | { "5311A", AR5K_VERSION_MAC, AR5K_SREV_AR5311A }, | |
102 | { "5311B", AR5K_VERSION_MAC, AR5K_SREV_AR5311B }, | |
103 | { "5211", AR5K_VERSION_MAC, AR5K_SREV_AR5211 }, | |
104 | { "5212", AR5K_VERSION_MAC, AR5K_SREV_AR5212 }, | |
105 | { "5213", AR5K_VERSION_MAC, AR5K_SREV_AR5213 }, | |
106 | { "5213A", AR5K_VERSION_MAC, AR5K_SREV_AR5213A }, | |
107 | { "2413", AR5K_VERSION_MAC, AR5K_SREV_AR2413 }, | |
108 | { "2414", AR5K_VERSION_MAC, AR5K_SREV_AR2414 }, | |
109 | { "5424", AR5K_VERSION_MAC, AR5K_SREV_AR5424 }, | |
110 | { "5413", AR5K_VERSION_MAC, AR5K_SREV_AR5413 }, | |
111 | { "5414", AR5K_VERSION_MAC, AR5K_SREV_AR5414 }, | |
112 | { "2415", AR5K_VERSION_MAC, AR5K_SREV_AR2415 }, | |
113 | { "5416", AR5K_VERSION_MAC, AR5K_SREV_AR5416 }, | |
114 | { "5418", AR5K_VERSION_MAC, AR5K_SREV_AR5418 }, | |
115 | { "2425", AR5K_VERSION_MAC, AR5K_SREV_AR2425 }, | |
116 | { "2417", AR5K_VERSION_MAC, AR5K_SREV_AR2417 }, | |
a0b907ee | 117 | #endif |
1bef016a | 118 | { "xxxxx", AR5K_VERSION_MAC, AR5K_SREV_UNKNOWN }, |
fa1c114f JS |
119 | { "5110", AR5K_VERSION_RAD, AR5K_SREV_RAD_5110 }, |
120 | { "5111", AR5K_VERSION_RAD, AR5K_SREV_RAD_5111 }, | |
1bef016a | 121 | { "5111A", AR5K_VERSION_RAD, AR5K_SREV_RAD_5111A }, |
fa1c114f JS |
122 | { "2111", AR5K_VERSION_RAD, AR5K_SREV_RAD_2111 }, |
123 | { "5112", AR5K_VERSION_RAD, AR5K_SREV_RAD_5112 }, | |
124 | { "5112A", AR5K_VERSION_RAD, AR5K_SREV_RAD_5112A }, | |
1bef016a | 125 | { "5112B", AR5K_VERSION_RAD, AR5K_SREV_RAD_5112B }, |
fa1c114f JS |
126 | { "2112", AR5K_VERSION_RAD, AR5K_SREV_RAD_2112 }, |
127 | { "2112A", AR5K_VERSION_RAD, AR5K_SREV_RAD_2112A }, | |
1bef016a NK |
128 | { "2112B", AR5K_VERSION_RAD, AR5K_SREV_RAD_2112B }, |
129 | { "2413", AR5K_VERSION_RAD, AR5K_SREV_RAD_2413 }, | |
130 | { "5413", AR5K_VERSION_RAD, AR5K_SREV_RAD_5413 }, | |
1bef016a | 131 | { "5424", AR5K_VERSION_RAD, AR5K_SREV_RAD_5424 }, |
fa1c114f | 132 | { "5133", AR5K_VERSION_RAD, AR5K_SREV_RAD_5133 }, |
a0b907ee FF |
133 | #ifdef CONFIG_ATHEROS_AR231X |
134 | { "2316", AR5K_VERSION_RAD, AR5K_SREV_RAD_2316 }, | |
135 | { "2317", AR5K_VERSION_RAD, AR5K_SREV_RAD_2317 }, | |
136 | #endif | |
fa1c114f JS |
137 | { "xxxxx", AR5K_VERSION_RAD, AR5K_SREV_UNKNOWN }, |
138 | }; | |
139 | ||
2c91108c | 140 | static const struct ieee80211_rate ath5k_rates[] = { |
63266a65 BR |
141 | { .bitrate = 10, |
142 | .hw_value = ATH5K_RATE_CODE_1M, }, | |
143 | { .bitrate = 20, | |
144 | .hw_value = ATH5K_RATE_CODE_2M, | |
145 | .hw_value_short = ATH5K_RATE_CODE_2M | AR5K_SET_SHORT_PREAMBLE, | |
146 | .flags = IEEE80211_RATE_SHORT_PREAMBLE }, | |
147 | { .bitrate = 55, | |
148 | .hw_value = ATH5K_RATE_CODE_5_5M, | |
149 | .hw_value_short = ATH5K_RATE_CODE_5_5M | AR5K_SET_SHORT_PREAMBLE, | |
150 | .flags = IEEE80211_RATE_SHORT_PREAMBLE }, | |
151 | { .bitrate = 110, | |
152 | .hw_value = ATH5K_RATE_CODE_11M, | |
153 | .hw_value_short = ATH5K_RATE_CODE_11M | AR5K_SET_SHORT_PREAMBLE, | |
154 | .flags = IEEE80211_RATE_SHORT_PREAMBLE }, | |
155 | { .bitrate = 60, | |
156 | .hw_value = ATH5K_RATE_CODE_6M, | |
157 | .flags = 0 }, | |
158 | { .bitrate = 90, | |
159 | .hw_value = ATH5K_RATE_CODE_9M, | |
160 | .flags = 0 }, | |
161 | { .bitrate = 120, | |
162 | .hw_value = ATH5K_RATE_CODE_12M, | |
163 | .flags = 0 }, | |
164 | { .bitrate = 180, | |
165 | .hw_value = ATH5K_RATE_CODE_18M, | |
166 | .flags = 0 }, | |
167 | { .bitrate = 240, | |
168 | .hw_value = ATH5K_RATE_CODE_24M, | |
169 | .flags = 0 }, | |
170 | { .bitrate = 360, | |
171 | .hw_value = ATH5K_RATE_CODE_36M, | |
172 | .flags = 0 }, | |
173 | { .bitrate = 480, | |
174 | .hw_value = ATH5K_RATE_CODE_48M, | |
175 | .flags = 0 }, | |
176 | { .bitrate = 540, | |
177 | .hw_value = ATH5K_RATE_CODE_54M, | |
178 | .flags = 0 }, | |
179 | /* XR missing */ | |
180 | }; | |
181 | ||
fa1c114f JS |
182 | static inline u64 ath5k_extend_tsf(struct ath5k_hw *ah, u32 rstamp) |
183 | { | |
184 | u64 tsf = ath5k_hw_get_tsf64(ah); | |
185 | ||
186 | if ((tsf & 0x7fff) < rstamp) | |
187 | tsf -= 0x8000; | |
188 | ||
189 | return (tsf & ~0x7fff) | rstamp; | |
190 | } | |
191 | ||
e5b046d8 | 192 | const char * |
fa1c114f JS |
193 | ath5k_chip_name(enum ath5k_srev_type type, u_int16_t val) |
194 | { | |
195 | const char *name = "xxxxx"; | |
196 | unsigned int i; | |
197 | ||
198 | for (i = 0; i < ARRAY_SIZE(srev_names); i++) { | |
199 | if (srev_names[i].sr_type != type) | |
200 | continue; | |
75d0edb8 NK |
201 | |
202 | if ((val & 0xf0) == srev_names[i].sr_val) | |
203 | name = srev_names[i].sr_name; | |
204 | ||
205 | if ((val & 0xff) == srev_names[i].sr_val) { | |
fa1c114f JS |
206 | name = srev_names[i].sr_name; |
207 | break; | |
208 | } | |
209 | } | |
210 | ||
211 | return name; | |
212 | } | |
e5aa8474 LR |
213 | static unsigned int ath5k_ioread32(void *hw_priv, u32 reg_offset) |
214 | { | |
215 | struct ath5k_hw *ah = (struct ath5k_hw *) hw_priv; | |
216 | return ath5k_hw_reg_read(ah, reg_offset); | |
217 | } | |
218 | ||
219 | static void ath5k_iowrite32(void *hw_priv, u32 val, u32 reg_offset) | |
220 | { | |
221 | struct ath5k_hw *ah = (struct ath5k_hw *) hw_priv; | |
222 | ath5k_hw_reg_write(ah, val, reg_offset); | |
223 | } | |
224 | ||
225 | static const struct ath_ops ath5k_common_ops = { | |
226 | .read = ath5k_ioread32, | |
227 | .write = ath5k_iowrite32, | |
228 | }; | |
fa1c114f | 229 | |
8a63facc BC |
230 | /***********************\ |
231 | * Driver Initialization * | |
232 | \***********************/ | |
233 | ||
234 | static int ath5k_reg_notifier(struct wiphy *wiphy, struct regulatory_request *request) | |
fa1c114f | 235 | { |
8a63facc BC |
236 | struct ieee80211_hw *hw = wiphy_to_ieee80211_hw(wiphy); |
237 | struct ath5k_softc *sc = hw->priv; | |
238 | struct ath_regulatory *regulatory = ath5k_hw_regulatory(sc->ah); | |
fa1c114f | 239 | |
8a63facc BC |
240 | return ath_reg_notifier_apply(wiphy, request, regulatory); |
241 | } | |
6ccf15a1 | 242 | |
8a63facc BC |
243 | /********************\ |
244 | * Channel/mode setup * | |
245 | \********************/ | |
fa1c114f | 246 | |
8a63facc BC |
247 | /* |
248 | * Returns true for the channel numbers used without all_channels modparam. | |
249 | */ | |
410e6120 | 250 | static bool ath5k_is_standard_channel(short chan, enum ieee80211_band band) |
8a63facc | 251 | { |
410e6120 BR |
252 | if (band == IEEE80211_BAND_2GHZ && chan <= 14) |
253 | return true; | |
254 | ||
255 | return /* UNII 1,2 */ | |
256 | (((chan & 3) == 0 && chan >= 36 && chan <= 64) || | |
8a63facc BC |
257 | /* midband */ |
258 | ((chan & 3) == 0 && chan >= 100 && chan <= 140) || | |
259 | /* UNII-3 */ | |
410e6120 BR |
260 | ((chan & 3) == 1 && chan >= 149 && chan <= 165) || |
261 | /* 802.11j 5.030-5.080 GHz (20MHz) */ | |
262 | (chan == 8 || chan == 12 || chan == 16) || | |
263 | /* 802.11j 4.9GHz (20MHz) */ | |
264 | (chan == 184 || chan == 188 || chan == 192 || chan == 196)); | |
8a63facc | 265 | } |
fa1c114f | 266 | |
8a63facc | 267 | static unsigned int |
97d9c3a3 BR |
268 | ath5k_setup_channels(struct ath5k_hw *ah, struct ieee80211_channel *channels, |
269 | unsigned int mode, unsigned int max) | |
8a63facc | 270 | { |
2b1351a3 | 271 | unsigned int count, size, chfreq, freq, ch; |
90c02d72 | 272 | enum ieee80211_band band; |
fa1c114f | 273 | |
8a63facc BC |
274 | switch (mode) { |
275 | case AR5K_MODE_11A: | |
8a63facc | 276 | /* 1..220, but 2GHz frequencies are filtered by check_channel */ |
97d9c3a3 | 277 | size = 220; |
8a63facc | 278 | chfreq = CHANNEL_5GHZ; |
90c02d72 | 279 | band = IEEE80211_BAND_5GHZ; |
8a63facc BC |
280 | break; |
281 | case AR5K_MODE_11B: | |
282 | case AR5K_MODE_11G: | |
8a63facc BC |
283 | size = 26; |
284 | chfreq = CHANNEL_2GHZ; | |
90c02d72 | 285 | band = IEEE80211_BAND_2GHZ; |
8a63facc BC |
286 | break; |
287 | default: | |
288 | ATH5K_WARN(ah->ah_sc, "bad mode, not copying channels\n"); | |
289 | return 0; | |
fa1c114f JS |
290 | } |
291 | ||
2b1351a3 BR |
292 | count = 0; |
293 | for (ch = 1; ch <= size && count < max; ch++) { | |
90c02d72 BR |
294 | freq = ieee80211_channel_to_frequency(ch, band); |
295 | ||
296 | if (freq == 0) /* mapping failed - not a standard channel */ | |
297 | continue; | |
fa1c114f | 298 | |
8a63facc BC |
299 | /* Check if channel is supported by the chipset */ |
300 | if (!ath5k_channel_ok(ah, freq, chfreq)) | |
301 | continue; | |
f59ac048 | 302 | |
410e6120 BR |
303 | if (!modparam_all_channels && |
304 | !ath5k_is_standard_channel(ch, band)) | |
8a63facc | 305 | continue; |
f59ac048 | 306 | |
8a63facc BC |
307 | /* Write channel info and increment counter */ |
308 | channels[count].center_freq = freq; | |
90c02d72 | 309 | channels[count].band = band; |
8a63facc BC |
310 | switch (mode) { |
311 | case AR5K_MODE_11A: | |
312 | case AR5K_MODE_11G: | |
313 | channels[count].hw_value = chfreq | CHANNEL_OFDM; | |
314 | break; | |
8a63facc BC |
315 | case AR5K_MODE_11B: |
316 | channels[count].hw_value = CHANNEL_B; | |
317 | } | |
fa1c114f | 318 | |
8a63facc | 319 | count++; |
8a63facc | 320 | } |
fa1c114f | 321 | |
8a63facc BC |
322 | return count; |
323 | } | |
fa1c114f | 324 | |
8a63facc BC |
325 | static void |
326 | ath5k_setup_rate_idx(struct ath5k_softc *sc, struct ieee80211_supported_band *b) | |
327 | { | |
328 | u8 i; | |
fa1c114f | 329 | |
8a63facc BC |
330 | for (i = 0; i < AR5K_MAX_RATES; i++) |
331 | sc->rate_idx[b->band][i] = -1; | |
fa1c114f | 332 | |
8a63facc BC |
333 | for (i = 0; i < b->n_bitrates; i++) { |
334 | sc->rate_idx[b->band][b->bitrates[i].hw_value] = i; | |
335 | if (b->bitrates[i].hw_value_short) | |
336 | sc->rate_idx[b->band][b->bitrates[i].hw_value_short] = i; | |
fa1c114f | 337 | } |
8a63facc | 338 | } |
fa1c114f | 339 | |
8a63facc BC |
340 | static int |
341 | ath5k_setup_bands(struct ieee80211_hw *hw) | |
342 | { | |
343 | struct ath5k_softc *sc = hw->priv; | |
344 | struct ath5k_hw *ah = sc->ah; | |
345 | struct ieee80211_supported_band *sband; | |
346 | int max_c, count_c = 0; | |
347 | int i; | |
fa1c114f | 348 | |
8a63facc BC |
349 | BUILD_BUG_ON(ARRAY_SIZE(sc->sbands) < IEEE80211_NUM_BANDS); |
350 | max_c = ARRAY_SIZE(sc->channels); | |
db719718 | 351 | |
8a63facc BC |
352 | /* 2GHz band */ |
353 | sband = &sc->sbands[IEEE80211_BAND_2GHZ]; | |
354 | sband->band = IEEE80211_BAND_2GHZ; | |
355 | sband->bitrates = &sc->rates[IEEE80211_BAND_2GHZ][0]; | |
9adca126 | 356 | |
8a63facc BC |
357 | if (test_bit(AR5K_MODE_11G, sc->ah->ah_capabilities.cap_mode)) { |
358 | /* G mode */ | |
359 | memcpy(sband->bitrates, &ath5k_rates[0], | |
360 | sizeof(struct ieee80211_rate) * 12); | |
361 | sband->n_bitrates = 12; | |
2f7fe870 | 362 | |
8a63facc | 363 | sband->channels = sc->channels; |
08105690 | 364 | sband->n_channels = ath5k_setup_channels(ah, sband->channels, |
8a63facc | 365 | AR5K_MODE_11G, max_c); |
fa1c114f | 366 | |
8a63facc BC |
367 | hw->wiphy->bands[IEEE80211_BAND_2GHZ] = sband; |
368 | count_c = sband->n_channels; | |
369 | max_c -= count_c; | |
370 | } else if (test_bit(AR5K_MODE_11B, sc->ah->ah_capabilities.cap_mode)) { | |
371 | /* B mode */ | |
372 | memcpy(sband->bitrates, &ath5k_rates[0], | |
373 | sizeof(struct ieee80211_rate) * 4); | |
374 | sband->n_bitrates = 4; | |
fa1c114f | 375 | |
8a63facc BC |
376 | /* 5211 only supports B rates and uses 4bit rate codes |
377 | * (e.g normally we have 0x1B for 1M, but on 5211 we have 0x0B) | |
378 | * fix them up here: | |
379 | */ | |
380 | if (ah->ah_version == AR5K_AR5211) { | |
381 | for (i = 0; i < 4; i++) { | |
382 | sband->bitrates[i].hw_value = | |
383 | sband->bitrates[i].hw_value & 0xF; | |
384 | sband->bitrates[i].hw_value_short = | |
385 | sband->bitrates[i].hw_value_short & 0xF; | |
fa1c114f JS |
386 | } |
387 | } | |
fa1c114f | 388 | |
8a63facc | 389 | sband->channels = sc->channels; |
08105690 | 390 | sband->n_channels = ath5k_setup_channels(ah, sband->channels, |
8a63facc | 391 | AR5K_MODE_11B, max_c); |
fa1c114f | 392 | |
8a63facc BC |
393 | hw->wiphy->bands[IEEE80211_BAND_2GHZ] = sband; |
394 | count_c = sband->n_channels; | |
395 | max_c -= count_c; | |
396 | } | |
397 | ath5k_setup_rate_idx(sc, sband); | |
fa1c114f | 398 | |
8a63facc BC |
399 | /* 5GHz band, A mode */ |
400 | if (test_bit(AR5K_MODE_11A, sc->ah->ah_capabilities.cap_mode)) { | |
401 | sband = &sc->sbands[IEEE80211_BAND_5GHZ]; | |
402 | sband->band = IEEE80211_BAND_5GHZ; | |
403 | sband->bitrates = &sc->rates[IEEE80211_BAND_5GHZ][0]; | |
fa1c114f | 404 | |
8a63facc BC |
405 | memcpy(sband->bitrates, &ath5k_rates[4], |
406 | sizeof(struct ieee80211_rate) * 8); | |
407 | sband->n_bitrates = 8; | |
fa1c114f | 408 | |
8a63facc | 409 | sband->channels = &sc->channels[count_c]; |
08105690 | 410 | sband->n_channels = ath5k_setup_channels(ah, sband->channels, |
8a63facc | 411 | AR5K_MODE_11A, max_c); |
fa1c114f | 412 | |
8a63facc BC |
413 | hw->wiphy->bands[IEEE80211_BAND_5GHZ] = sband; |
414 | } | |
415 | ath5k_setup_rate_idx(sc, sband); | |
416 | ||
417 | ath5k_debug_dump_bands(sc); | |
fa1c114f | 418 | |
fa1c114f JS |
419 | return 0; |
420 | } | |
421 | ||
8a63facc BC |
422 | /* |
423 | * Set/change channels. We always reset the chip. | |
424 | * To accomplish this we must first cleanup any pending DMA, | |
425 | * then restart stuff after a la ath5k_init. | |
426 | * | |
427 | * Called with sc->lock. | |
428 | */ | |
cd2c5486 | 429 | int |
8a63facc BC |
430 | ath5k_chan_set(struct ath5k_softc *sc, struct ieee80211_channel *chan) |
431 | { | |
432 | ATH5K_DBG(sc, ATH5K_DEBUG_RESET, | |
433 | "channel set, resetting (%u -> %u MHz)\n", | |
434 | sc->curchan->center_freq, chan->center_freq); | |
435 | ||
8451d22d | 436 | /* |
8a63facc BC |
437 | * To switch channels clear any pending DMA operations; |
438 | * wait long enough for the RX fifo to drain, reset the | |
439 | * hardware at the new frequency, and then re-enable | |
440 | * the relevant bits of the h/w. | |
8451d22d | 441 | */ |
8aec7af9 | 442 | return ath5k_reset(sc, chan, true); |
fa1c114f | 443 | } |
fa1c114f | 444 | |
e4b0b32a | 445 | void ath5k_vif_iter(void *data, u8 *mac, struct ieee80211_vif *vif) |
b1ae1edf | 446 | { |
e4b0b32a | 447 | struct ath5k_vif_iter_data *iter_data = data; |
b1ae1edf | 448 | int i; |
62c58fb4 | 449 | struct ath5k_vif *avf = (void *)vif->drv_priv; |
b1ae1edf BG |
450 | |
451 | if (iter_data->hw_macaddr) | |
452 | for (i = 0; i < ETH_ALEN; i++) | |
453 | iter_data->mask[i] &= | |
454 | ~(iter_data->hw_macaddr[i] ^ mac[i]); | |
455 | ||
456 | if (!iter_data->found_active) { | |
457 | iter_data->found_active = true; | |
458 | memcpy(iter_data->active_mac, mac, ETH_ALEN); | |
459 | } | |
460 | ||
461 | if (iter_data->need_set_hw_addr && iter_data->hw_macaddr) | |
462 | if (compare_ether_addr(iter_data->hw_macaddr, mac) == 0) | |
463 | iter_data->need_set_hw_addr = false; | |
464 | ||
465 | if (!iter_data->any_assoc) { | |
b1ae1edf BG |
466 | if (avf->assoc) |
467 | iter_data->any_assoc = true; | |
468 | } | |
62c58fb4 BG |
469 | |
470 | /* Calculate combined mode - when APs are active, operate in AP mode. | |
471 | * Otherwise use the mode of the new interface. This can currently | |
472 | * only deal with combinations of APs and STAs. Only one ad-hoc | |
7afbb2f0 | 473 | * interfaces is allowed. |
62c58fb4 BG |
474 | */ |
475 | if (avf->opmode == NL80211_IFTYPE_AP) | |
476 | iter_data->opmode = NL80211_IFTYPE_AP; | |
e4b0b32a BG |
477 | else { |
478 | if (avf->opmode == NL80211_IFTYPE_STATION) | |
479 | iter_data->n_stas++; | |
62c58fb4 BG |
480 | if (iter_data->opmode == NL80211_IFTYPE_UNSPECIFIED) |
481 | iter_data->opmode = avf->opmode; | |
e4b0b32a | 482 | } |
b1ae1edf BG |
483 | } |
484 | ||
cd2c5486 BR |
485 | void |
486 | ath5k_update_bssid_mask_and_opmode(struct ath5k_softc *sc, | |
487 | struct ieee80211_vif *vif) | |
b1ae1edf BG |
488 | { |
489 | struct ath_common *common = ath5k_hw_common(sc->ah); | |
e4b0b32a BG |
490 | struct ath5k_vif_iter_data iter_data; |
491 | u32 rfilt; | |
b1ae1edf BG |
492 | |
493 | /* | |
494 | * Use the hardware MAC address as reference, the hardware uses it | |
495 | * together with the BSSID mask when matching addresses. | |
496 | */ | |
497 | iter_data.hw_macaddr = common->macaddr; | |
498 | memset(&iter_data.mask, 0xff, ETH_ALEN); | |
499 | iter_data.found_active = false; | |
500 | iter_data.need_set_hw_addr = true; | |
62c58fb4 | 501 | iter_data.opmode = NL80211_IFTYPE_UNSPECIFIED; |
e4b0b32a | 502 | iter_data.n_stas = 0; |
b1ae1edf BG |
503 | |
504 | if (vif) | |
e4b0b32a | 505 | ath5k_vif_iter(&iter_data, vif->addr, vif); |
b1ae1edf BG |
506 | |
507 | /* Get list of all active MAC addresses */ | |
e4b0b32a | 508 | ieee80211_iterate_active_interfaces_atomic(sc->hw, ath5k_vif_iter, |
b1ae1edf BG |
509 | &iter_data); |
510 | memcpy(sc->bssidmask, iter_data.mask, ETH_ALEN); | |
511 | ||
62c58fb4 BG |
512 | sc->opmode = iter_data.opmode; |
513 | if (sc->opmode == NL80211_IFTYPE_UNSPECIFIED) | |
514 | /* Nothing active, default to station mode */ | |
515 | sc->opmode = NL80211_IFTYPE_STATION; | |
516 | ||
7afbb2f0 BG |
517 | ath5k_hw_set_opmode(sc->ah, sc->opmode); |
518 | ATH5K_DBG(sc, ATH5K_DEBUG_MODE, "mode setup opmode %d (%s)\n", | |
519 | sc->opmode, ath_opmode_to_string(sc->opmode)); | |
62c58fb4 | 520 | |
b1ae1edf BG |
521 | if (iter_data.need_set_hw_addr && iter_data.found_active) |
522 | ath5k_hw_set_lladdr(sc->ah, iter_data.active_mac); | |
523 | ||
62c58fb4 BG |
524 | if (ath5k_hw_hasbssidmask(sc->ah)) |
525 | ath5k_hw_set_bssid_mask(sc->ah, sc->bssidmask); | |
b1ae1edf | 526 | |
e4b0b32a BG |
527 | /* Set up RX Filter */ |
528 | if (iter_data.n_stas > 1) { | |
529 | /* If you have multiple STA interfaces connected to | |
530 | * different APs, ARPs are not received (most of the time?) | |
531 | * Enabling PROMISC appears to fix that probem. | |
532 | */ | |
533 | sc->filter_flags |= AR5K_RX_FILTER_PROM; | |
534 | } | |
fa1c114f | 535 | |
8a63facc | 536 | rfilt = sc->filter_flags; |
e4b0b32a | 537 | ath5k_hw_set_rx_filter(sc->ah, rfilt); |
8a63facc BC |
538 | ATH5K_DBG(sc, ATH5K_DEBUG_MODE, "RX filter 0x%x\n", rfilt); |
539 | } | |
fa1c114f | 540 | |
8a63facc BC |
541 | static inline int |
542 | ath5k_hw_to_driver_rix(struct ath5k_softc *sc, int hw_rix) | |
543 | { | |
544 | int rix; | |
fa1c114f | 545 | |
8a63facc BC |
546 | /* return base rate on errors */ |
547 | if (WARN(hw_rix < 0 || hw_rix >= AR5K_MAX_RATES, | |
548 | "hw_rix out of bounds: %x\n", hw_rix)) | |
549 | return 0; | |
550 | ||
930a7622 | 551 | rix = sc->rate_idx[sc->curchan->band][hw_rix]; |
8a63facc BC |
552 | if (WARN(rix < 0, "invalid hw_rix: %x\n", hw_rix)) |
553 | rix = 0; | |
554 | ||
555 | return rix; | |
556 | } | |
557 | ||
558 | /***************\ | |
559 | * Buffers setup * | |
560 | \***************/ | |
561 | ||
562 | static | |
563 | struct sk_buff *ath5k_rx_skb_alloc(struct ath5k_softc *sc, dma_addr_t *skb_addr) | |
564 | { | |
565 | struct ath_common *common = ath5k_hw_common(sc->ah); | |
566 | struct sk_buff *skb; | |
fa1c114f JS |
567 | |
568 | /* | |
8a63facc BC |
569 | * Allocate buffer with headroom_needed space for the |
570 | * fake physical layer header at the start. | |
fa1c114f | 571 | */ |
8a63facc BC |
572 | skb = ath_rxbuf_alloc(common, |
573 | common->rx_bufsize, | |
574 | GFP_ATOMIC); | |
fa1c114f | 575 | |
8a63facc BC |
576 | if (!skb) { |
577 | ATH5K_ERR(sc, "can't alloc skbuff of size %u\n", | |
578 | common->rx_bufsize); | |
579 | return NULL; | |
fa1c114f JS |
580 | } |
581 | ||
aeae4ac9 | 582 | *skb_addr = dma_map_single(sc->dev, |
8a63facc | 583 | skb->data, common->rx_bufsize, |
aeae4ac9 FF |
584 | DMA_FROM_DEVICE); |
585 | ||
586 | if (unlikely(dma_mapping_error(sc->dev, *skb_addr))) { | |
8a63facc BC |
587 | ATH5K_ERR(sc, "%s: DMA mapping failed\n", __func__); |
588 | dev_kfree_skb(skb); | |
589 | return NULL; | |
0e149cf5 | 590 | } |
8a63facc BC |
591 | return skb; |
592 | } | |
0e149cf5 | 593 | |
8a63facc BC |
594 | static int |
595 | ath5k_rxbuf_setup(struct ath5k_softc *sc, struct ath5k_buf *bf) | |
596 | { | |
597 | struct ath5k_hw *ah = sc->ah; | |
598 | struct sk_buff *skb = bf->skb; | |
599 | struct ath5k_desc *ds; | |
600 | int ret; | |
fa1c114f | 601 | |
8a63facc BC |
602 | if (!skb) { |
603 | skb = ath5k_rx_skb_alloc(sc, &bf->skbaddr); | |
604 | if (!skb) | |
605 | return -ENOMEM; | |
606 | bf->skb = skb; | |
f769c36b BC |
607 | } |
608 | ||
8a63facc BC |
609 | /* |
610 | * Setup descriptors. For receive we always terminate | |
611 | * the descriptor list with a self-linked entry so we'll | |
612 | * not get overrun under high load (as can happen with a | |
613 | * 5212 when ANI processing enables PHY error frames). | |
614 | * | |
615 | * To ensure the last descriptor is self-linked we create | |
616 | * each descriptor as self-linked and add it to the end. As | |
617 | * each additional descriptor is added the previous self-linked | |
618 | * entry is "fixed" naturally. This should be safe even | |
619 | * if DMA is happening. When processing RX interrupts we | |
620 | * never remove/process the last, self-linked, entry on the | |
621 | * descriptor list. This ensures the hardware always has | |
622 | * someplace to write a new frame. | |
623 | */ | |
624 | ds = bf->desc; | |
625 | ds->ds_link = bf->daddr; /* link to self */ | |
626 | ds->ds_data = bf->skbaddr; | |
627 | ret = ath5k_hw_setup_rx_desc(ah, ds, ah->common.rx_bufsize, 0); | |
fa1c114f | 628 | if (ret) { |
8a63facc BC |
629 | ATH5K_ERR(sc, "%s: could not setup RX desc\n", __func__); |
630 | return ret; | |
fa1c114f JS |
631 | } |
632 | ||
8a63facc BC |
633 | if (sc->rxlink != NULL) |
634 | *sc->rxlink = bf->daddr; | |
635 | sc->rxlink = &ds->ds_link; | |
fa1c114f | 636 | return 0; |
fa1c114f JS |
637 | } |
638 | ||
8a63facc | 639 | static enum ath5k_pkt_type get_hw_packet_type(struct sk_buff *skb) |
fa1c114f | 640 | { |
8a63facc BC |
641 | struct ieee80211_hdr *hdr; |
642 | enum ath5k_pkt_type htype; | |
643 | __le16 fc; | |
fa1c114f | 644 | |
8a63facc BC |
645 | hdr = (struct ieee80211_hdr *)skb->data; |
646 | fc = hdr->frame_control; | |
fa1c114f | 647 | |
8a63facc BC |
648 | if (ieee80211_is_beacon(fc)) |
649 | htype = AR5K_PKT_TYPE_BEACON; | |
650 | else if (ieee80211_is_probe_resp(fc)) | |
651 | htype = AR5K_PKT_TYPE_PROBE_RESP; | |
652 | else if (ieee80211_is_atim(fc)) | |
653 | htype = AR5K_PKT_TYPE_ATIM; | |
654 | else if (ieee80211_is_pspoll(fc)) | |
655 | htype = AR5K_PKT_TYPE_PSPOLL; | |
fa1c114f | 656 | else |
8a63facc | 657 | htype = AR5K_PKT_TYPE_NORMAL; |
fa1c114f | 658 | |
8a63facc | 659 | return htype; |
42639fcd BC |
660 | } |
661 | ||
8a63facc BC |
662 | static int |
663 | ath5k_txbuf_setup(struct ath5k_softc *sc, struct ath5k_buf *bf, | |
664 | struct ath5k_txq *txq, int padsize) | |
fa1c114f | 665 | { |
8a63facc BC |
666 | struct ath5k_hw *ah = sc->ah; |
667 | struct ath5k_desc *ds = bf->desc; | |
668 | struct sk_buff *skb = bf->skb; | |
669 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
670 | unsigned int pktlen, flags, keyidx = AR5K_TXKEYIX_INVALID; | |
671 | struct ieee80211_rate *rate; | |
672 | unsigned int mrr_rate[3], mrr_tries[3]; | |
673 | int i, ret; | |
674 | u16 hw_rate; | |
675 | u16 cts_rate = 0; | |
676 | u16 duration = 0; | |
677 | u8 rc_flags; | |
fa1c114f | 678 | |
8a63facc | 679 | flags = AR5K_TXDESC_INTREQ | AR5K_TXDESC_CLRDMASK; |
fa1c114f | 680 | |
8a63facc | 681 | /* XXX endianness */ |
aeae4ac9 FF |
682 | bf->skbaddr = dma_map_single(sc->dev, skb->data, skb->len, |
683 | DMA_TO_DEVICE); | |
fa1c114f | 684 | |
8a63facc | 685 | rate = ieee80211_get_tx_rate(sc->hw, info); |
29ad2fac JL |
686 | if (!rate) { |
687 | ret = -EINVAL; | |
688 | goto err_unmap; | |
689 | } | |
fa1c114f | 690 | |
8a63facc BC |
691 | if (info->flags & IEEE80211_TX_CTL_NO_ACK) |
692 | flags |= AR5K_TXDESC_NOACK; | |
fa1c114f | 693 | |
8a63facc BC |
694 | rc_flags = info->control.rates[0].flags; |
695 | hw_rate = (rc_flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE) ? | |
696 | rate->hw_value_short : rate->hw_value; | |
42639fcd | 697 | |
8a63facc BC |
698 | pktlen = skb->len; |
699 | ||
700 | /* FIXME: If we are in g mode and rate is a CCK rate | |
701 | * subtract ah->ah_txpower.txp_cck_ofdm_pwr_delta | |
702 | * from tx power (value is in dB units already) */ | |
703 | if (info->control.hw_key) { | |
704 | keyidx = info->control.hw_key->hw_key_idx; | |
705 | pktlen += info->control.hw_key->icv_len; | |
706 | } | |
707 | if (rc_flags & IEEE80211_TX_RC_USE_RTS_CTS) { | |
708 | flags |= AR5K_TXDESC_RTSENA; | |
709 | cts_rate = ieee80211_get_rts_cts_rate(sc->hw, info)->hw_value; | |
710 | duration = le16_to_cpu(ieee80211_rts_duration(sc->hw, | |
b1ae1edf | 711 | info->control.vif, pktlen, info)); |
8a63facc BC |
712 | } |
713 | if (rc_flags & IEEE80211_TX_RC_USE_CTS_PROTECT) { | |
714 | flags |= AR5K_TXDESC_CTSENA; | |
715 | cts_rate = ieee80211_get_rts_cts_rate(sc->hw, info)->hw_value; | |
716 | duration = le16_to_cpu(ieee80211_ctstoself_duration(sc->hw, | |
b1ae1edf | 717 | info->control.vif, pktlen, info)); |
8a63facc BC |
718 | } |
719 | ret = ah->ah_setup_tx_desc(ah, ds, pktlen, | |
720 | ieee80211_get_hdrlen_from_skb(skb), padsize, | |
721 | get_hw_packet_type(skb), | |
722 | (sc->power_level * 2), | |
723 | hw_rate, | |
724 | info->control.rates[0].count, keyidx, ah->ah_tx_ant, flags, | |
725 | cts_rate, duration); | |
726 | if (ret) | |
727 | goto err_unmap; | |
728 | ||
729 | memset(mrr_rate, 0, sizeof(mrr_rate)); | |
730 | memset(mrr_tries, 0, sizeof(mrr_tries)); | |
731 | for (i = 0; i < 3; i++) { | |
732 | rate = ieee80211_get_alt_retry_rate(sc->hw, info, i); | |
733 | if (!rate) | |
400ec45a | 734 | break; |
fa1c114f | 735 | |
8a63facc BC |
736 | mrr_rate[i] = rate->hw_value; |
737 | mrr_tries[i] = info->control.rates[i + 1].count; | |
fa1c114f JS |
738 | } |
739 | ||
8a63facc BC |
740 | ath5k_hw_setup_mrr_tx_desc(ah, ds, |
741 | mrr_rate[0], mrr_tries[0], | |
742 | mrr_rate[1], mrr_tries[1], | |
743 | mrr_rate[2], mrr_tries[2]); | |
fa1c114f | 744 | |
8a63facc BC |
745 | ds->ds_link = 0; |
746 | ds->ds_data = bf->skbaddr; | |
63266a65 | 747 | |
8a63facc BC |
748 | spin_lock_bh(&txq->lock); |
749 | list_add_tail(&bf->list, &txq->q); | |
925e0b06 | 750 | txq->txq_len++; |
8a63facc BC |
751 | if (txq->link == NULL) /* is this first packet? */ |
752 | ath5k_hw_set_txdp(ah, txq->qnum, bf->daddr); | |
753 | else /* no, so only link it */ | |
754 | *txq->link = bf->daddr; | |
63266a65 | 755 | |
8a63facc BC |
756 | txq->link = &ds->ds_link; |
757 | ath5k_hw_start_tx_dma(ah, txq->qnum); | |
758 | mmiowb(); | |
759 | spin_unlock_bh(&txq->lock); | |
760 | ||
761 | return 0; | |
762 | err_unmap: | |
aeae4ac9 | 763 | dma_unmap_single(sc->dev, bf->skbaddr, skb->len, DMA_TO_DEVICE); |
8a63facc | 764 | return ret; |
63266a65 BR |
765 | } |
766 | ||
8a63facc BC |
767 | /*******************\ |
768 | * Descriptors setup * | |
769 | \*******************/ | |
770 | ||
d8ee398d | 771 | static int |
aeae4ac9 | 772 | ath5k_desc_alloc(struct ath5k_softc *sc) |
fa1c114f | 773 | { |
8a63facc BC |
774 | struct ath5k_desc *ds; |
775 | struct ath5k_buf *bf; | |
776 | dma_addr_t da; | |
777 | unsigned int i; | |
778 | int ret; | |
d8ee398d | 779 | |
8a63facc BC |
780 | /* allocate descriptors */ |
781 | sc->desc_len = sizeof(struct ath5k_desc) * | |
782 | (ATH_TXBUF + ATH_RXBUF + ATH_BCBUF + 1); | |
aeae4ac9 FF |
783 | |
784 | sc->desc = dma_alloc_coherent(sc->dev, sc->desc_len, | |
785 | &sc->desc_daddr, GFP_KERNEL); | |
8a63facc BC |
786 | if (sc->desc == NULL) { |
787 | ATH5K_ERR(sc, "can't allocate descriptors\n"); | |
788 | ret = -ENOMEM; | |
789 | goto err; | |
790 | } | |
791 | ds = sc->desc; | |
792 | da = sc->desc_daddr; | |
793 | ATH5K_DBG(sc, ATH5K_DEBUG_ANY, "DMA map: %p (%zu) -> %llx\n", | |
794 | ds, sc->desc_len, (unsigned long long)sc->desc_daddr); | |
fa1c114f | 795 | |
8a63facc BC |
796 | bf = kcalloc(1 + ATH_TXBUF + ATH_RXBUF + ATH_BCBUF, |
797 | sizeof(struct ath5k_buf), GFP_KERNEL); | |
798 | if (bf == NULL) { | |
799 | ATH5K_ERR(sc, "can't allocate bufptr\n"); | |
800 | ret = -ENOMEM; | |
801 | goto err_free; | |
802 | } | |
803 | sc->bufptr = bf; | |
fa1c114f | 804 | |
8a63facc BC |
805 | INIT_LIST_HEAD(&sc->rxbuf); |
806 | for (i = 0; i < ATH_RXBUF; i++, bf++, ds++, da += sizeof(*ds)) { | |
807 | bf->desc = ds; | |
808 | bf->daddr = da; | |
809 | list_add_tail(&bf->list, &sc->rxbuf); | |
810 | } | |
d8ee398d | 811 | |
8a63facc BC |
812 | INIT_LIST_HEAD(&sc->txbuf); |
813 | sc->txbuf_len = ATH_TXBUF; | |
814 | for (i = 0; i < ATH_TXBUF; i++, bf++, ds++, | |
815 | da += sizeof(*ds)) { | |
816 | bf->desc = ds; | |
817 | bf->daddr = da; | |
818 | list_add_tail(&bf->list, &sc->txbuf); | |
fa1c114f JS |
819 | } |
820 | ||
b1ae1edf BG |
821 | /* beacon buffers */ |
822 | INIT_LIST_HEAD(&sc->bcbuf); | |
823 | for (i = 0; i < ATH_BCBUF; i++, bf++, ds++, da += sizeof(*ds)) { | |
824 | bf->desc = ds; | |
825 | bf->daddr = da; | |
826 | list_add_tail(&bf->list, &sc->bcbuf); | |
827 | } | |
fa1c114f | 828 | |
8a63facc BC |
829 | return 0; |
830 | err_free: | |
aeae4ac9 | 831 | dma_free_coherent(sc->dev, sc->desc_len, sc->desc, sc->desc_daddr); |
8a63facc BC |
832 | err: |
833 | sc->desc = NULL; | |
834 | return ret; | |
835 | } | |
fa1c114f | 836 | |
cd2c5486 BR |
837 | void |
838 | ath5k_txbuf_free_skb(struct ath5k_softc *sc, struct ath5k_buf *bf) | |
839 | { | |
840 | BUG_ON(!bf); | |
841 | if (!bf->skb) | |
842 | return; | |
843 | dma_unmap_single(sc->dev, bf->skbaddr, bf->skb->len, | |
844 | DMA_TO_DEVICE); | |
845 | dev_kfree_skb_any(bf->skb); | |
846 | bf->skb = NULL; | |
847 | bf->skbaddr = 0; | |
848 | bf->desc->ds_data = 0; | |
849 | } | |
850 | ||
851 | void | |
852 | ath5k_rxbuf_free_skb(struct ath5k_softc *sc, struct ath5k_buf *bf) | |
853 | { | |
854 | struct ath5k_hw *ah = sc->ah; | |
855 | struct ath_common *common = ath5k_hw_common(ah); | |
856 | ||
857 | BUG_ON(!bf); | |
858 | if (!bf->skb) | |
859 | return; | |
860 | dma_unmap_single(sc->dev, bf->skbaddr, common->rx_bufsize, | |
861 | DMA_FROM_DEVICE); | |
862 | dev_kfree_skb_any(bf->skb); | |
863 | bf->skb = NULL; | |
864 | bf->skbaddr = 0; | |
865 | bf->desc->ds_data = 0; | |
866 | } | |
867 | ||
8a63facc | 868 | static void |
aeae4ac9 | 869 | ath5k_desc_free(struct ath5k_softc *sc) |
8a63facc BC |
870 | { |
871 | struct ath5k_buf *bf; | |
d8ee398d | 872 | |
8a63facc BC |
873 | list_for_each_entry(bf, &sc->txbuf, list) |
874 | ath5k_txbuf_free_skb(sc, bf); | |
875 | list_for_each_entry(bf, &sc->rxbuf, list) | |
876 | ath5k_rxbuf_free_skb(sc, bf); | |
b1ae1edf BG |
877 | list_for_each_entry(bf, &sc->bcbuf, list) |
878 | ath5k_txbuf_free_skb(sc, bf); | |
d8ee398d | 879 | |
8a63facc | 880 | /* Free memory associated with all descriptors */ |
aeae4ac9 | 881 | dma_free_coherent(sc->dev, sc->desc_len, sc->desc, sc->desc_daddr); |
8a63facc BC |
882 | sc->desc = NULL; |
883 | sc->desc_daddr = 0; | |
d8ee398d | 884 | |
8a63facc BC |
885 | kfree(sc->bufptr); |
886 | sc->bufptr = NULL; | |
fa1c114f JS |
887 | } |
888 | ||
8a63facc BC |
889 | |
890 | /**************\ | |
891 | * Queues setup * | |
892 | \**************/ | |
893 | ||
894 | static struct ath5k_txq * | |
895 | ath5k_txq_setup(struct ath5k_softc *sc, | |
896 | int qtype, int subtype) | |
fa1c114f | 897 | { |
8a63facc BC |
898 | struct ath5k_hw *ah = sc->ah; |
899 | struct ath5k_txq *txq; | |
900 | struct ath5k_txq_info qi = { | |
901 | .tqi_subtype = subtype, | |
de8af455 BR |
902 | /* XXX: default values not correct for B and XR channels, |
903 | * but who cares? */ | |
904 | .tqi_aifs = AR5K_TUNE_AIFS, | |
905 | .tqi_cw_min = AR5K_TUNE_CWMIN, | |
906 | .tqi_cw_max = AR5K_TUNE_CWMAX | |
8a63facc BC |
907 | }; |
908 | int qnum; | |
d8ee398d | 909 | |
e30eb4ab | 910 | /* |
8a63facc BC |
911 | * Enable interrupts only for EOL and DESC conditions. |
912 | * We mark tx descriptors to receive a DESC interrupt | |
913 | * when a tx queue gets deep; otherwise we wait for the | |
914 | * EOL to reap descriptors. Note that this is done to | |
915 | * reduce interrupt load and this only defers reaping | |
916 | * descriptors, never transmitting frames. Aside from | |
917 | * reducing interrupts this also permits more concurrency. | |
918 | * The only potential downside is if the tx queue backs | |
919 | * up in which case the top half of the kernel may backup | |
920 | * due to a lack of tx descriptors. | |
e30eb4ab | 921 | */ |
8a63facc BC |
922 | qi.tqi_flags = AR5K_TXQ_FLAG_TXEOLINT_ENABLE | |
923 | AR5K_TXQ_FLAG_TXDESCINT_ENABLE; | |
924 | qnum = ath5k_hw_setup_tx_queue(ah, qtype, &qi); | |
925 | if (qnum < 0) { | |
926 | /* | |
927 | * NB: don't print a message, this happens | |
928 | * normally on parts with too few tx queues | |
929 | */ | |
930 | return ERR_PTR(qnum); | |
931 | } | |
932 | if (qnum >= ARRAY_SIZE(sc->txqs)) { | |
933 | ATH5K_ERR(sc, "hw qnum %u out of range, max %tu!\n", | |
934 | qnum, ARRAY_SIZE(sc->txqs)); | |
935 | ath5k_hw_release_tx_queue(ah, qnum); | |
936 | return ERR_PTR(-EINVAL); | |
937 | } | |
938 | txq = &sc->txqs[qnum]; | |
939 | if (!txq->setup) { | |
940 | txq->qnum = qnum; | |
941 | txq->link = NULL; | |
942 | INIT_LIST_HEAD(&txq->q); | |
943 | spin_lock_init(&txq->lock); | |
944 | txq->setup = true; | |
925e0b06 | 945 | txq->txq_len = 0; |
81266baf | 946 | txq->txq_max = ATH5K_TXQ_LEN_MAX; |
4edd761f | 947 | txq->txq_poll_mark = false; |
923e5b3d | 948 | txq->txq_stuck = 0; |
8a63facc BC |
949 | } |
950 | return &sc->txqs[qnum]; | |
fa1c114f JS |
951 | } |
952 | ||
8a63facc BC |
953 | static int |
954 | ath5k_beaconq_setup(struct ath5k_hw *ah) | |
fa1c114f | 955 | { |
8a63facc | 956 | struct ath5k_txq_info qi = { |
de8af455 BR |
957 | /* XXX: default values not correct for B and XR channels, |
958 | * but who cares? */ | |
959 | .tqi_aifs = AR5K_TUNE_AIFS, | |
960 | .tqi_cw_min = AR5K_TUNE_CWMIN, | |
961 | .tqi_cw_max = AR5K_TUNE_CWMAX, | |
8a63facc BC |
962 | /* NB: for dynamic turbo, don't enable any other interrupts */ |
963 | .tqi_flags = AR5K_TXQ_FLAG_TXDESCINT_ENABLE | |
964 | }; | |
d8ee398d | 965 | |
8a63facc | 966 | return ath5k_hw_setup_tx_queue(ah, AR5K_TX_QUEUE_BEACON, &qi); |
fa1c114f JS |
967 | } |
968 | ||
8a63facc BC |
969 | static int |
970 | ath5k_beaconq_config(struct ath5k_softc *sc) | |
fa1c114f JS |
971 | { |
972 | struct ath5k_hw *ah = sc->ah; | |
8a63facc BC |
973 | struct ath5k_txq_info qi; |
974 | int ret; | |
fa1c114f | 975 | |
8a63facc BC |
976 | ret = ath5k_hw_get_tx_queueprops(ah, sc->bhalq, &qi); |
977 | if (ret) | |
978 | goto err; | |
fa1c114f | 979 | |
8a63facc BC |
980 | if (sc->opmode == NL80211_IFTYPE_AP || |
981 | sc->opmode == NL80211_IFTYPE_MESH_POINT) { | |
982 | /* | |
983 | * Always burst out beacon and CAB traffic | |
984 | * (aifs = cwmin = cwmax = 0) | |
985 | */ | |
986 | qi.tqi_aifs = 0; | |
987 | qi.tqi_cw_min = 0; | |
988 | qi.tqi_cw_max = 0; | |
989 | } else if (sc->opmode == NL80211_IFTYPE_ADHOC) { | |
990 | /* | |
991 | * Adhoc mode; backoff between 0 and (2 * cw_min). | |
992 | */ | |
993 | qi.tqi_aifs = 0; | |
994 | qi.tqi_cw_min = 0; | |
de8af455 | 995 | qi.tqi_cw_max = 2 * AR5K_TUNE_CWMIN; |
8a63facc | 996 | } |
fa1c114f | 997 | |
8a63facc BC |
998 | ATH5K_DBG(sc, ATH5K_DEBUG_BEACON, |
999 | "beacon queueprops tqi_aifs:%d tqi_cw_min:%d tqi_cw_max:%d\n", | |
1000 | qi.tqi_aifs, qi.tqi_cw_min, qi.tqi_cw_max); | |
fa1c114f | 1001 | |
8a63facc BC |
1002 | ret = ath5k_hw_set_tx_queueprops(ah, sc->bhalq, &qi); |
1003 | if (ret) { | |
1004 | ATH5K_ERR(sc, "%s: unable to update parameters for beacon " | |
1005 | "hardware queue!\n", __func__); | |
1006 | goto err; | |
1007 | } | |
1008 | ret = ath5k_hw_reset_tx_queue(ah, sc->bhalq); /* push to h/w */ | |
1009 | if (ret) | |
1010 | goto err; | |
b7266047 | 1011 | |
8a63facc BC |
1012 | /* reconfigure cabq with ready time to 80% of beacon_interval */ |
1013 | ret = ath5k_hw_get_tx_queueprops(ah, AR5K_TX_QUEUE_ID_CAB, &qi); | |
1014 | if (ret) | |
1015 | goto err; | |
b7266047 | 1016 | |
8a63facc BC |
1017 | qi.tqi_ready_time = (sc->bintval * 80) / 100; |
1018 | ret = ath5k_hw_set_tx_queueprops(ah, AR5K_TX_QUEUE_ID_CAB, &qi); | |
1019 | if (ret) | |
1020 | goto err; | |
b7266047 | 1021 | |
8a63facc BC |
1022 | ret = ath5k_hw_reset_tx_queue(ah, AR5K_TX_QUEUE_ID_CAB); |
1023 | err: | |
1024 | return ret; | |
d8ee398d LR |
1025 | } |
1026 | ||
80dac9ee NK |
1027 | /** |
1028 | * ath5k_drain_tx_buffs - Empty tx buffers | |
1029 | * | |
1030 | * @sc The &struct ath5k_softc | |
1031 | * | |
1032 | * Empty tx buffers from all queues in preparation | |
1033 | * of a reset or during shutdown. | |
1034 | * | |
1035 | * NB: this assumes output has been stopped and | |
1036 | * we do not need to block ath5k_tx_tasklet | |
1037 | */ | |
8a63facc | 1038 | static void |
80dac9ee | 1039 | ath5k_drain_tx_buffs(struct ath5k_softc *sc) |
8a63facc | 1040 | { |
80dac9ee | 1041 | struct ath5k_txq *txq; |
8a63facc | 1042 | struct ath5k_buf *bf, *bf0; |
80dac9ee | 1043 | int i; |
b6ea0356 | 1044 | |
80dac9ee NK |
1045 | for (i = 0; i < ARRAY_SIZE(sc->txqs); i++) { |
1046 | if (sc->txqs[i].setup) { | |
1047 | txq = &sc->txqs[i]; | |
1048 | spin_lock_bh(&txq->lock); | |
1049 | list_for_each_entry_safe(bf, bf0, &txq->q, list) { | |
1050 | ath5k_debug_printtxbuf(sc, bf); | |
b6ea0356 | 1051 | |
80dac9ee | 1052 | ath5k_txbuf_free_skb(sc, bf); |
fa1c114f | 1053 | |
80dac9ee NK |
1054 | spin_lock_bh(&sc->txbuflock); |
1055 | list_move_tail(&bf->list, &sc->txbuf); | |
1056 | sc->txbuf_len++; | |
1057 | txq->txq_len--; | |
1058 | spin_unlock_bh(&sc->txbuflock); | |
8a63facc | 1059 | } |
80dac9ee NK |
1060 | txq->link = NULL; |
1061 | txq->txq_poll_mark = false; | |
1062 | spin_unlock_bh(&txq->lock); | |
1063 | } | |
0452d4a5 | 1064 | } |
fa1c114f JS |
1065 | } |
1066 | ||
8a63facc BC |
1067 | static void |
1068 | ath5k_txq_release(struct ath5k_softc *sc) | |
2ac2927a | 1069 | { |
8a63facc BC |
1070 | struct ath5k_txq *txq = sc->txqs; |
1071 | unsigned int i; | |
2ac2927a | 1072 | |
8a63facc BC |
1073 | for (i = 0; i < ARRAY_SIZE(sc->txqs); i++, txq++) |
1074 | if (txq->setup) { | |
1075 | ath5k_hw_release_tx_queue(sc->ah, txq->qnum); | |
1076 | txq->setup = false; | |
1077 | } | |
1078 | } | |
2ac2927a | 1079 | |
2ac2927a | 1080 | |
8a63facc BC |
1081 | /*************\ |
1082 | * RX Handling * | |
1083 | \*************/ | |
2ac2927a | 1084 | |
8a63facc BC |
1085 | /* |
1086 | * Enable the receive h/w following a reset. | |
1087 | */ | |
fa1c114f | 1088 | static int |
8a63facc | 1089 | ath5k_rx_start(struct ath5k_softc *sc) |
fa1c114f JS |
1090 | { |
1091 | struct ath5k_hw *ah = sc->ah; | |
8a63facc BC |
1092 | struct ath_common *common = ath5k_hw_common(ah); |
1093 | struct ath5k_buf *bf; | |
1094 | int ret; | |
fa1c114f | 1095 | |
8a63facc | 1096 | common->rx_bufsize = roundup(IEEE80211_MAX_FRAME_LEN, common->cachelsz); |
fa1c114f | 1097 | |
8a63facc BC |
1098 | ATH5K_DBG(sc, ATH5K_DEBUG_RESET, "cachelsz %u rx_bufsize %u\n", |
1099 | common->cachelsz, common->rx_bufsize); | |
2f7fe870 | 1100 | |
8a63facc BC |
1101 | spin_lock_bh(&sc->rxbuflock); |
1102 | sc->rxlink = NULL; | |
1103 | list_for_each_entry(bf, &sc->rxbuf, list) { | |
1104 | ret = ath5k_rxbuf_setup(sc, bf); | |
1105 | if (ret != 0) { | |
1106 | spin_unlock_bh(&sc->rxbuflock); | |
1107 | goto err; | |
1108 | } | |
2f7fe870 | 1109 | } |
8a63facc BC |
1110 | bf = list_first_entry(&sc->rxbuf, struct ath5k_buf, list); |
1111 | ath5k_hw_set_rxdp(ah, bf->daddr); | |
1112 | spin_unlock_bh(&sc->rxbuflock); | |
2f7fe870 | 1113 | |
8a63facc | 1114 | ath5k_hw_start_rx_dma(ah); /* enable recv descriptors */ |
e4b0b32a | 1115 | ath5k_update_bssid_mask_and_opmode(sc, NULL); /* set filters, etc. */ |
8a63facc | 1116 | ath5k_hw_start_rx_pcu(ah); /* re-enable PCU/DMA engine */ |
fa1c114f JS |
1117 | |
1118 | return 0; | |
8a63facc | 1119 | err: |
fa1c114f JS |
1120 | return ret; |
1121 | } | |
1122 | ||
8a63facc | 1123 | /* |
80dac9ee NK |
1124 | * Disable the receive logic on PCU (DRU) |
1125 | * In preparation for a shutdown. | |
1126 | * | |
1127 | * Note: Doesn't stop rx DMA, ath5k_hw_dma_stop | |
1128 | * does. | |
8a63facc BC |
1129 | */ |
1130 | static void | |
1131 | ath5k_rx_stop(struct ath5k_softc *sc) | |
fa1c114f | 1132 | { |
8a63facc | 1133 | struct ath5k_hw *ah = sc->ah; |
fa1c114f | 1134 | |
8a63facc | 1135 | ath5k_hw_set_rx_filter(ah, 0); /* clear recv filter */ |
80dac9ee | 1136 | ath5k_hw_stop_rx_pcu(ah); /* disable PCU */ |
fa1c114f | 1137 | |
8a63facc BC |
1138 | ath5k_debug_printrxbuffs(sc, ah); |
1139 | } | |
fa1c114f | 1140 | |
8a63facc BC |
1141 | static unsigned int |
1142 | ath5k_rx_decrypted(struct ath5k_softc *sc, struct sk_buff *skb, | |
1143 | struct ath5k_rx_status *rs) | |
1144 | { | |
1145 | struct ath5k_hw *ah = sc->ah; | |
1146 | struct ath_common *common = ath5k_hw_common(ah); | |
1147 | struct ieee80211_hdr *hdr = (void *)skb->data; | |
1148 | unsigned int keyix, hlen; | |
fa1c114f | 1149 | |
8a63facc BC |
1150 | if (!(rs->rs_status & AR5K_RXERR_DECRYPT) && |
1151 | rs->rs_keyix != AR5K_RXKEYIX_INVALID) | |
1152 | return RX_FLAG_DECRYPTED; | |
fa1c114f | 1153 | |
8a63facc BC |
1154 | /* Apparently when a default key is used to decrypt the packet |
1155 | the hw does not set the index used to decrypt. In such cases | |
1156 | get the index from the packet. */ | |
1157 | hlen = ieee80211_hdrlen(hdr->frame_control); | |
1158 | if (ieee80211_has_protected(hdr->frame_control) && | |
1159 | !(rs->rs_status & AR5K_RXERR_DECRYPT) && | |
1160 | skb->len >= hlen + 4) { | |
1161 | keyix = skb->data[hlen + 3] >> 6; | |
1162 | ||
1163 | if (test_bit(keyix, common->keymap)) | |
1164 | return RX_FLAG_DECRYPTED; | |
1165 | } | |
fa1c114f JS |
1166 | |
1167 | return 0; | |
fa1c114f JS |
1168 | } |
1169 | ||
8a63facc | 1170 | |
fa1c114f | 1171 | static void |
8a63facc BC |
1172 | ath5k_check_ibss_tsf(struct ath5k_softc *sc, struct sk_buff *skb, |
1173 | struct ieee80211_rx_status *rxs) | |
fa1c114f | 1174 | { |
8a63facc BC |
1175 | struct ath_common *common = ath5k_hw_common(sc->ah); |
1176 | u64 tsf, bc_tstamp; | |
1177 | u32 hw_tu; | |
1178 | struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)skb->data; | |
fa1c114f | 1179 | |
8a63facc BC |
1180 | if (ieee80211_is_beacon(mgmt->frame_control) && |
1181 | le16_to_cpu(mgmt->u.beacon.capab_info) & WLAN_CAPABILITY_IBSS && | |
1182 | memcmp(mgmt->bssid, common->curbssid, ETH_ALEN) == 0) { | |
1183 | /* | |
1184 | * Received an IBSS beacon with the same BSSID. Hardware *must* | |
1185 | * have updated the local TSF. We have to work around various | |
1186 | * hardware bugs, though... | |
1187 | */ | |
1188 | tsf = ath5k_hw_get_tsf64(sc->ah); | |
1189 | bc_tstamp = le64_to_cpu(mgmt->u.beacon.timestamp); | |
1190 | hw_tu = TSF_TO_TU(tsf); | |
fa1c114f | 1191 | |
8a63facc BC |
1192 | ATH5K_DBG_UNLIMIT(sc, ATH5K_DEBUG_BEACON, |
1193 | "beacon %llx mactime %llx (diff %lld) tsf now %llx\n", | |
1194 | (unsigned long long)bc_tstamp, | |
1195 | (unsigned long long)rxs->mactime, | |
1196 | (unsigned long long)(rxs->mactime - bc_tstamp), | |
1197 | (unsigned long long)tsf); | |
fa1c114f | 1198 | |
8a63facc BC |
1199 | /* |
1200 | * Sometimes the HW will give us a wrong tstamp in the rx | |
1201 | * status, causing the timestamp extension to go wrong. | |
1202 | * (This seems to happen especially with beacon frames bigger | |
1203 | * than 78 byte (incl. FCS)) | |
1204 | * But we know that the receive timestamp must be later than the | |
1205 | * timestamp of the beacon since HW must have synced to that. | |
1206 | * | |
1207 | * NOTE: here we assume mactime to be after the frame was | |
1208 | * received, not like mac80211 which defines it at the start. | |
1209 | */ | |
1210 | if (bc_tstamp > rxs->mactime) { | |
1211 | ATH5K_DBG_UNLIMIT(sc, ATH5K_DEBUG_BEACON, | |
1212 | "fixing mactime from %llx to %llx\n", | |
1213 | (unsigned long long)rxs->mactime, | |
1214 | (unsigned long long)tsf); | |
1215 | rxs->mactime = tsf; | |
1216 | } | |
fa1c114f | 1217 | |
8a63facc BC |
1218 | /* |
1219 | * Local TSF might have moved higher than our beacon timers, | |
1220 | * in that case we have to update them to continue sending | |
1221 | * beacons. This also takes care of synchronizing beacon sending | |
1222 | * times with other stations. | |
1223 | */ | |
1224 | if (hw_tu >= sc->nexttbtt) | |
1225 | ath5k_beacon_update_timers(sc, bc_tstamp); | |
7f896126 BR |
1226 | |
1227 | /* Check if the beacon timers are still correct, because a TSF | |
1228 | * update might have created a window between them - for a | |
1229 | * longer description see the comment of this function: */ | |
1230 | if (!ath5k_hw_check_beacon_timers(sc->ah, sc->bintval)) { | |
1231 | ath5k_beacon_update_timers(sc, bc_tstamp); | |
1232 | ATH5K_DBG_UNLIMIT(sc, ATH5K_DEBUG_BEACON, | |
1233 | "fixed beacon timers after beacon receive\n"); | |
1234 | } | |
8a63facc BC |
1235 | } |
1236 | } | |
fa1c114f | 1237 | |
8a63facc BC |
1238 | static void |
1239 | ath5k_update_beacon_rssi(struct ath5k_softc *sc, struct sk_buff *skb, int rssi) | |
1240 | { | |
1241 | struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)skb->data; | |
1242 | struct ath5k_hw *ah = sc->ah; | |
1243 | struct ath_common *common = ath5k_hw_common(ah); | |
fa1c114f | 1244 | |
8a63facc BC |
1245 | /* only beacons from our BSSID */ |
1246 | if (!ieee80211_is_beacon(mgmt->frame_control) || | |
1247 | memcmp(mgmt->bssid, common->curbssid, ETH_ALEN) != 0) | |
1248 | return; | |
fa1c114f | 1249 | |
eef39bef | 1250 | ewma_add(&ah->ah_beacon_rssi_avg, rssi); |
fa1c114f | 1251 | |
8a63facc BC |
1252 | /* in IBSS mode we should keep RSSI statistics per neighbour */ |
1253 | /* le16_to_cpu(mgmt->u.beacon.capab_info) & WLAN_CAPABILITY_IBSS */ | |
1254 | } | |
fa1c114f | 1255 | |
8a63facc BC |
1256 | /* |
1257 | * Compute padding position. skb must contain an IEEE 802.11 frame | |
1258 | */ | |
1259 | static int ath5k_common_padpos(struct sk_buff *skb) | |
fa1c114f | 1260 | { |
8a63facc BC |
1261 | struct ieee80211_hdr * hdr = (struct ieee80211_hdr *)skb->data; |
1262 | __le16 frame_control = hdr->frame_control; | |
1263 | int padpos = 24; | |
fa1c114f | 1264 | |
8a63facc BC |
1265 | if (ieee80211_has_a4(frame_control)) { |
1266 | padpos += ETH_ALEN; | |
fa1c114f | 1267 | } |
8a63facc BC |
1268 | if (ieee80211_is_data_qos(frame_control)) { |
1269 | padpos += IEEE80211_QOS_CTL_LEN; | |
fa1c114f | 1270 | } |
8a63facc BC |
1271 | |
1272 | return padpos; | |
fa1c114f JS |
1273 | } |
1274 | ||
8a63facc BC |
1275 | /* |
1276 | * This function expects an 802.11 frame and returns the number of | |
1277 | * bytes added, or -1 if we don't have enough header room. | |
1278 | */ | |
1279 | static int ath5k_add_padding(struct sk_buff *skb) | |
fa1c114f | 1280 | { |
8a63facc BC |
1281 | int padpos = ath5k_common_padpos(skb); |
1282 | int padsize = padpos & 3; | |
fa1c114f | 1283 | |
8a63facc | 1284 | if (padsize && skb->len>padpos) { |
fa1c114f | 1285 | |
8a63facc BC |
1286 | if (skb_headroom(skb) < padsize) |
1287 | return -1; | |
fa1c114f | 1288 | |
8a63facc BC |
1289 | skb_push(skb, padsize); |
1290 | memmove(skb->data, skb->data+padsize, padpos); | |
1291 | return padsize; | |
1292 | } | |
a951ae21 | 1293 | |
8a63facc BC |
1294 | return 0; |
1295 | } | |
fa1c114f | 1296 | |
8a63facc BC |
1297 | /* |
1298 | * The MAC header is padded to have 32-bit boundary if the | |
1299 | * packet payload is non-zero. The general calculation for | |
1300 | * padsize would take into account odd header lengths: | |
1301 | * padsize = 4 - (hdrlen & 3); however, since only | |
1302 | * even-length headers are used, padding can only be 0 or 2 | |
1303 | * bytes and we can optimize this a bit. We must not try to | |
1304 | * remove padding from short control frames that do not have a | |
1305 | * payload. | |
1306 | * | |
1307 | * This function expects an 802.11 frame and returns the number of | |
1308 | * bytes removed. | |
1309 | */ | |
1310 | static int ath5k_remove_padding(struct sk_buff *skb) | |
1311 | { | |
1312 | int padpos = ath5k_common_padpos(skb); | |
1313 | int padsize = padpos & 3; | |
6d91e1d8 | 1314 | |
8a63facc BC |
1315 | if (padsize && skb->len>=padpos+padsize) { |
1316 | memmove(skb->data + padsize, skb->data, padpos); | |
1317 | skb_pull(skb, padsize); | |
1318 | return padsize; | |
fa1c114f | 1319 | } |
a951ae21 | 1320 | |
8a63facc | 1321 | return 0; |
fa1c114f JS |
1322 | } |
1323 | ||
1324 | static void | |
8a63facc BC |
1325 | ath5k_receive_frame(struct ath5k_softc *sc, struct sk_buff *skb, |
1326 | struct ath5k_rx_status *rs) | |
fa1c114f | 1327 | { |
8a63facc BC |
1328 | struct ieee80211_rx_status *rxs; |
1329 | ||
1330 | ath5k_remove_padding(skb); | |
1331 | ||
1332 | rxs = IEEE80211_SKB_RXCB(skb); | |
1333 | ||
1334 | rxs->flag = 0; | |
1335 | if (unlikely(rs->rs_status & AR5K_RXERR_MIC)) | |
1336 | rxs->flag |= RX_FLAG_MMIC_ERROR; | |
fa1c114f JS |
1337 | |
1338 | /* | |
8a63facc BC |
1339 | * always extend the mac timestamp, since this information is |
1340 | * also needed for proper IBSS merging. | |
1341 | * | |
1342 | * XXX: it might be too late to do it here, since rs_tstamp is | |
1343 | * 15bit only. that means TSF extension has to be done within | |
1344 | * 32768usec (about 32ms). it might be necessary to move this to | |
1345 | * the interrupt handler, like it is done in madwifi. | |
1346 | * | |
1347 | * Unfortunately we don't know when the hardware takes the rx | |
1348 | * timestamp (beginning of phy frame, data frame, end of rx?). | |
1349 | * The only thing we know is that it is hardware specific... | |
1350 | * On AR5213 it seems the rx timestamp is at the end of the | |
1351 | * frame, but i'm not sure. | |
1352 | * | |
1353 | * NOTE: mac80211 defines mactime at the beginning of the first | |
1354 | * data symbol. Since we don't have any time references it's | |
1355 | * impossible to comply to that. This affects IBSS merge only | |
1356 | * right now, so it's not too bad... | |
fa1c114f | 1357 | */ |
8a63facc | 1358 | rxs->mactime = ath5k_extend_tsf(sc->ah, rs->rs_tstamp); |
6ebacbb7 | 1359 | rxs->flag |= RX_FLAG_MACTIME_MPDU; |
fa1c114f | 1360 | |
8a63facc | 1361 | rxs->freq = sc->curchan->center_freq; |
930a7622 | 1362 | rxs->band = sc->curchan->band; |
fa1c114f | 1363 | |
8a63facc | 1364 | rxs->signal = sc->ah->ah_noise_floor + rs->rs_rssi; |
fa1c114f | 1365 | |
8a63facc | 1366 | rxs->antenna = rs->rs_antenna; |
fa1c114f | 1367 | |
8a63facc BC |
1368 | if (rs->rs_antenna > 0 && rs->rs_antenna < 5) |
1369 | sc->stats.antenna_rx[rs->rs_antenna]++; | |
1370 | else | |
1371 | sc->stats.antenna_rx[0]++; /* invalid */ | |
fa1c114f | 1372 | |
8a63facc BC |
1373 | rxs->rate_idx = ath5k_hw_to_driver_rix(sc, rs->rs_rate); |
1374 | rxs->flag |= ath5k_rx_decrypted(sc, skb, rs); | |
fa1c114f | 1375 | |
8a63facc | 1376 | if (rxs->rate_idx >= 0 && rs->rs_rate == |
930a7622 | 1377 | sc->sbands[sc->curchan->band].bitrates[rxs->rate_idx].hw_value_short) |
8a63facc | 1378 | rxs->flag |= RX_FLAG_SHORTPRE; |
fa1c114f | 1379 | |
0e472252 | 1380 | trace_ath5k_rx(sc, skb); |
fa1c114f | 1381 | |
8a63facc | 1382 | ath5k_update_beacon_rssi(sc, skb, rs->rs_rssi); |
fa1c114f | 1383 | |
8a63facc BC |
1384 | /* check beacons in IBSS mode */ |
1385 | if (sc->opmode == NL80211_IFTYPE_ADHOC) | |
1386 | ath5k_check_ibss_tsf(sc, skb, rxs); | |
fa1c114f | 1387 | |
8a63facc BC |
1388 | ieee80211_rx(sc->hw, skb); |
1389 | } | |
fa1c114f | 1390 | |
8a63facc BC |
1391 | /** ath5k_frame_receive_ok() - Do we want to receive this frame or not? |
1392 | * | |
1393 | * Check if we want to further process this frame or not. Also update | |
1394 | * statistics. Return true if we want this frame, false if not. | |
fa1c114f | 1395 | */ |
8a63facc BC |
1396 | static bool |
1397 | ath5k_receive_frame_ok(struct ath5k_softc *sc, struct ath5k_rx_status *rs) | |
fa1c114f | 1398 | { |
8a63facc | 1399 | sc->stats.rx_all_count++; |
b72acddb | 1400 | sc->stats.rx_bytes_count += rs->rs_datalen; |
fa1c114f | 1401 | |
8a63facc BC |
1402 | if (unlikely(rs->rs_status)) { |
1403 | if (rs->rs_status & AR5K_RXERR_CRC) | |
1404 | sc->stats.rxerr_crc++; | |
1405 | if (rs->rs_status & AR5K_RXERR_FIFO) | |
1406 | sc->stats.rxerr_fifo++; | |
1407 | if (rs->rs_status & AR5K_RXERR_PHY) { | |
1408 | sc->stats.rxerr_phy++; | |
1409 | if (rs->rs_phyerr > 0 && rs->rs_phyerr < 32) | |
1410 | sc->stats.rxerr_phy_code[rs->rs_phyerr]++; | |
1411 | return false; | |
1412 | } | |
1413 | if (rs->rs_status & AR5K_RXERR_DECRYPT) { | |
1414 | /* | |
1415 | * Decrypt error. If the error occurred | |
1416 | * because there was no hardware key, then | |
1417 | * let the frame through so the upper layers | |
1418 | * can process it. This is necessary for 5210 | |
1419 | * parts which have no way to setup a ``clear'' | |
1420 | * key cache entry. | |
1421 | * | |
1422 | * XXX do key cache faulting | |
1423 | */ | |
1424 | sc->stats.rxerr_decrypt++; | |
1425 | if (rs->rs_keyix == AR5K_RXKEYIX_INVALID && | |
1426 | !(rs->rs_status & AR5K_RXERR_CRC)) | |
1427 | return true; | |
1428 | } | |
1429 | if (rs->rs_status & AR5K_RXERR_MIC) { | |
1430 | sc->stats.rxerr_mic++; | |
1431 | return true; | |
fa1c114f | 1432 | } |
fa1c114f | 1433 | |
8a63facc BC |
1434 | /* reject any frames with non-crypto errors */ |
1435 | if (rs->rs_status & ~(AR5K_RXERR_DECRYPT)) | |
1436 | return false; | |
1437 | } | |
fa1c114f | 1438 | |
8a63facc BC |
1439 | if (unlikely(rs->rs_more)) { |
1440 | sc->stats.rxerr_jumbo++; | |
1441 | return false; | |
1442 | } | |
1443 | return true; | |
fa1c114f JS |
1444 | } |
1445 | ||
fa1c114f | 1446 | static void |
8a63facc | 1447 | ath5k_tasklet_rx(unsigned long data) |
fa1c114f | 1448 | { |
8a63facc BC |
1449 | struct ath5k_rx_status rs = {}; |
1450 | struct sk_buff *skb, *next_skb; | |
1451 | dma_addr_t next_skb_addr; | |
1452 | struct ath5k_softc *sc = (void *)data; | |
dc1e001b LR |
1453 | struct ath5k_hw *ah = sc->ah; |
1454 | struct ath_common *common = ath5k_hw_common(ah); | |
8a63facc BC |
1455 | struct ath5k_buf *bf; |
1456 | struct ath5k_desc *ds; | |
1457 | int ret; | |
fa1c114f | 1458 | |
8a63facc BC |
1459 | spin_lock(&sc->rxbuflock); |
1460 | if (list_empty(&sc->rxbuf)) { | |
1461 | ATH5K_WARN(sc, "empty rx buf pool\n"); | |
1462 | goto unlock; | |
1463 | } | |
1464 | do { | |
1465 | bf = list_first_entry(&sc->rxbuf, struct ath5k_buf, list); | |
1466 | BUG_ON(bf->skb == NULL); | |
1467 | skb = bf->skb; | |
1468 | ds = bf->desc; | |
fa1c114f | 1469 | |
8a63facc BC |
1470 | /* bail if HW is still using self-linked descriptor */ |
1471 | if (ath5k_hw_get_rxdp(sc->ah) == bf->daddr) | |
1472 | break; | |
fa1c114f | 1473 | |
8a63facc BC |
1474 | ret = sc->ah->ah_proc_rx_desc(sc->ah, ds, &rs); |
1475 | if (unlikely(ret == -EINPROGRESS)) | |
1476 | break; | |
1477 | else if (unlikely(ret)) { | |
1478 | ATH5K_ERR(sc, "error in processing rx descriptor\n"); | |
1479 | sc->stats.rxerr_proc++; | |
1480 | break; | |
1481 | } | |
fa1c114f | 1482 | |
8a63facc BC |
1483 | if (ath5k_receive_frame_ok(sc, &rs)) { |
1484 | next_skb = ath5k_rx_skb_alloc(sc, &next_skb_addr); | |
fa1c114f | 1485 | |
8a63facc BC |
1486 | /* |
1487 | * If we can't replace bf->skb with a new skb under | |
1488 | * memory pressure, just skip this packet | |
1489 | */ | |
1490 | if (!next_skb) | |
1491 | goto next; | |
036cd1ec | 1492 | |
aeae4ac9 | 1493 | dma_unmap_single(sc->dev, bf->skbaddr, |
8a63facc | 1494 | common->rx_bufsize, |
aeae4ac9 | 1495 | DMA_FROM_DEVICE); |
036cd1ec | 1496 | |
8a63facc | 1497 | skb_put(skb, rs.rs_datalen); |
6ba81c2c | 1498 | |
8a63facc | 1499 | ath5k_receive_frame(sc, skb, &rs); |
6ba81c2c | 1500 | |
8a63facc BC |
1501 | bf->skb = next_skb; |
1502 | bf->skbaddr = next_skb_addr; | |
036cd1ec | 1503 | } |
8a63facc BC |
1504 | next: |
1505 | list_move_tail(&bf->list, &sc->rxbuf); | |
1506 | } while (ath5k_rxbuf_setup(sc, bf) == 0); | |
1507 | unlock: | |
1508 | spin_unlock(&sc->rxbuflock); | |
036cd1ec BR |
1509 | } |
1510 | ||
b4ea449d | 1511 | |
8a63facc BC |
1512 | /*************\ |
1513 | * TX Handling * | |
1514 | \*************/ | |
b4ea449d | 1515 | |
7bb45683 | 1516 | void |
cd2c5486 BR |
1517 | ath5k_tx_queue(struct ieee80211_hw *hw, struct sk_buff *skb, |
1518 | struct ath5k_txq *txq) | |
8a63facc BC |
1519 | { |
1520 | struct ath5k_softc *sc = hw->priv; | |
1521 | struct ath5k_buf *bf; | |
1522 | unsigned long flags; | |
1523 | int padsize; | |
b4ea449d | 1524 | |
0e472252 | 1525 | trace_ath5k_tx(sc, skb, txq); |
b4ea449d | 1526 | |
8a63facc BC |
1527 | /* |
1528 | * The hardware expects the header padded to 4 byte boundaries. | |
1529 | * If this is not the case, we add the padding after the header. | |
1530 | */ | |
1531 | padsize = ath5k_add_padding(skb); | |
1532 | if (padsize < 0) { | |
1533 | ATH5K_ERR(sc, "tx hdrlen not %%4: not enough" | |
1534 | " headroom to pad"); | |
1535 | goto drop_packet; | |
1536 | } | |
8127fbdc | 1537 | |
81266baf | 1538 | if (txq->txq_len >= txq->txq_max) |
925e0b06 BR |
1539 | ieee80211_stop_queue(hw, txq->qnum); |
1540 | ||
8a63facc BC |
1541 | spin_lock_irqsave(&sc->txbuflock, flags); |
1542 | if (list_empty(&sc->txbuf)) { | |
1543 | ATH5K_ERR(sc, "no further txbuf available, dropping packet\n"); | |
1544 | spin_unlock_irqrestore(&sc->txbuflock, flags); | |
651d9375 | 1545 | ieee80211_stop_queues(hw); |
8a63facc | 1546 | goto drop_packet; |
8127fbdc | 1547 | } |
8a63facc BC |
1548 | bf = list_first_entry(&sc->txbuf, struct ath5k_buf, list); |
1549 | list_del(&bf->list); | |
1550 | sc->txbuf_len--; | |
1551 | if (list_empty(&sc->txbuf)) | |
1552 | ieee80211_stop_queues(hw); | |
1553 | spin_unlock_irqrestore(&sc->txbuflock, flags); | |
1554 | ||
1555 | bf->skb = skb; | |
1556 | ||
1557 | if (ath5k_txbuf_setup(sc, bf, txq, padsize)) { | |
1558 | bf->skb = NULL; | |
1559 | spin_lock_irqsave(&sc->txbuflock, flags); | |
1560 | list_add_tail(&bf->list, &sc->txbuf); | |
1561 | sc->txbuf_len++; | |
1562 | spin_unlock_irqrestore(&sc->txbuflock, flags); | |
1563 | goto drop_packet; | |
8127fbdc | 1564 | } |
7bb45683 | 1565 | return; |
8127fbdc | 1566 | |
8a63facc BC |
1567 | drop_packet: |
1568 | dev_kfree_skb_any(skb); | |
8127fbdc BP |
1569 | } |
1570 | ||
1440401e BR |
1571 | static void |
1572 | ath5k_tx_frame_completed(struct ath5k_softc *sc, struct sk_buff *skb, | |
0e472252 | 1573 | struct ath5k_txq *txq, struct ath5k_tx_status *ts) |
1440401e BR |
1574 | { |
1575 | struct ieee80211_tx_info *info; | |
1576 | int i; | |
1577 | ||
1578 | sc->stats.tx_all_count++; | |
b72acddb | 1579 | sc->stats.tx_bytes_count += skb->len; |
1440401e BR |
1580 | info = IEEE80211_SKB_CB(skb); |
1581 | ||
1582 | ieee80211_tx_info_clear_status(info); | |
1583 | for (i = 0; i < 4; i++) { | |
1584 | struct ieee80211_tx_rate *r = | |
1585 | &info->status.rates[i]; | |
1586 | ||
1587 | if (ts->ts_rate[i]) { | |
1588 | r->idx = ath5k_hw_to_driver_rix(sc, ts->ts_rate[i]); | |
1589 | r->count = ts->ts_retry[i]; | |
1590 | } else { | |
1591 | r->idx = -1; | |
1592 | r->count = 0; | |
1593 | } | |
1594 | } | |
1595 | ||
1596 | /* count the successful attempt as well */ | |
1597 | info->status.rates[ts->ts_final_idx].count++; | |
1598 | ||
1599 | if (unlikely(ts->ts_status)) { | |
1600 | sc->stats.ack_fail++; | |
1601 | if (ts->ts_status & AR5K_TXERR_FILT) { | |
1602 | info->flags |= IEEE80211_TX_STAT_TX_FILTERED; | |
1603 | sc->stats.txerr_filt++; | |
1604 | } | |
1605 | if (ts->ts_status & AR5K_TXERR_XRETRY) | |
1606 | sc->stats.txerr_retry++; | |
1607 | if (ts->ts_status & AR5K_TXERR_FIFO) | |
1608 | sc->stats.txerr_fifo++; | |
1609 | } else { | |
1610 | info->flags |= IEEE80211_TX_STAT_ACK; | |
1611 | info->status.ack_signal = ts->ts_rssi; | |
1612 | } | |
1613 | ||
1614 | /* | |
1615 | * Remove MAC header padding before giving the frame | |
1616 | * back to mac80211. | |
1617 | */ | |
1618 | ath5k_remove_padding(skb); | |
1619 | ||
1620 | if (ts->ts_antenna > 0 && ts->ts_antenna < 5) | |
1621 | sc->stats.antenna_tx[ts->ts_antenna]++; | |
1622 | else | |
1623 | sc->stats.antenna_tx[0]++; /* invalid */ | |
1624 | ||
0e472252 | 1625 | trace_ath5k_tx_complete(sc, skb, txq, ts); |
1440401e BR |
1626 | ieee80211_tx_status(sc->hw, skb); |
1627 | } | |
8a63facc BC |
1628 | |
1629 | static void | |
1630 | ath5k_tx_processq(struct ath5k_softc *sc, struct ath5k_txq *txq) | |
8127fbdc | 1631 | { |
8a63facc BC |
1632 | struct ath5k_tx_status ts = {}; |
1633 | struct ath5k_buf *bf, *bf0; | |
1634 | struct ath5k_desc *ds; | |
1635 | struct sk_buff *skb; | |
1440401e | 1636 | int ret; |
8127fbdc | 1637 | |
8a63facc BC |
1638 | spin_lock(&txq->lock); |
1639 | list_for_each_entry_safe(bf, bf0, &txq->q, list) { | |
23413296 BR |
1640 | |
1641 | txq->txq_poll_mark = false; | |
1642 | ||
1643 | /* skb might already have been processed last time. */ | |
1644 | if (bf->skb != NULL) { | |
1645 | ds = bf->desc; | |
1646 | ||
1647 | ret = sc->ah->ah_proc_tx_desc(sc->ah, ds, &ts); | |
1648 | if (unlikely(ret == -EINPROGRESS)) | |
1649 | break; | |
1650 | else if (unlikely(ret)) { | |
1651 | ATH5K_ERR(sc, | |
1652 | "error %d while processing " | |
1653 | "queue %u\n", ret, txq->qnum); | |
1654 | break; | |
1655 | } | |
1656 | ||
1657 | skb = bf->skb; | |
1658 | bf->skb = NULL; | |
aeae4ac9 FF |
1659 | |
1660 | dma_unmap_single(sc->dev, bf->skbaddr, skb->len, | |
1661 | DMA_TO_DEVICE); | |
0e472252 | 1662 | ath5k_tx_frame_completed(sc, skb, txq, &ts); |
23413296 | 1663 | } |
8127fbdc | 1664 | |
8a63facc BC |
1665 | /* |
1666 | * It's possible that the hardware can say the buffer is | |
1667 | * completed when it hasn't yet loaded the ds_link from | |
23413296 BR |
1668 | * host memory and moved on. |
1669 | * Always keep the last descriptor to avoid HW races... | |
8a63facc | 1670 | */ |
23413296 BR |
1671 | if (ath5k_hw_get_txdp(sc->ah, txq->qnum) != bf->daddr) { |
1672 | spin_lock(&sc->txbuflock); | |
1673 | list_move_tail(&bf->list, &sc->txbuf); | |
1674 | sc->txbuf_len++; | |
1675 | txq->txq_len--; | |
1676 | spin_unlock(&sc->txbuflock); | |
8a63facc | 1677 | } |
fa1c114f | 1678 | } |
fa1c114f | 1679 | spin_unlock(&txq->lock); |
4198a8d0 | 1680 | if (txq->txq_len < ATH5K_TXQ_LEN_LOW && txq->qnum < 4) |
925e0b06 | 1681 | ieee80211_wake_queue(sc->hw, txq->qnum); |
fa1c114f JS |
1682 | } |
1683 | ||
1684 | static void | |
1685 | ath5k_tasklet_tx(unsigned long data) | |
1686 | { | |
8784d2ee | 1687 | int i; |
fa1c114f JS |
1688 | struct ath5k_softc *sc = (void *)data; |
1689 | ||
8784d2ee BC |
1690 | for (i=0; i < AR5K_NUM_TX_QUEUES; i++) |
1691 | if (sc->txqs[i].setup && (sc->ah->ah_txq_isr & BIT(i))) | |
1692 | ath5k_tx_processq(sc, &sc->txqs[i]); | |
fa1c114f JS |
1693 | } |
1694 | ||
1695 | ||
fa1c114f JS |
1696 | /*****************\ |
1697 | * Beacon handling * | |
1698 | \*****************/ | |
1699 | ||
1700 | /* | |
1701 | * Setup the beacon frame for transmit. | |
1702 | */ | |
1703 | static int | |
e039fa4a | 1704 | ath5k_beacon_setup(struct ath5k_softc *sc, struct ath5k_buf *bf) |
fa1c114f JS |
1705 | { |
1706 | struct sk_buff *skb = bf->skb; | |
a888d52d | 1707 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
fa1c114f JS |
1708 | struct ath5k_hw *ah = sc->ah; |
1709 | struct ath5k_desc *ds; | |
2bed03eb NK |
1710 | int ret = 0; |
1711 | u8 antenna; | |
fa1c114f | 1712 | u32 flags; |
8127fbdc | 1713 | const int padsize = 0; |
fa1c114f | 1714 | |
aeae4ac9 FF |
1715 | bf->skbaddr = dma_map_single(sc->dev, skb->data, skb->len, |
1716 | DMA_TO_DEVICE); | |
fa1c114f JS |
1717 | ATH5K_DBG(sc, ATH5K_DEBUG_BEACON, "skb %p [data %p len %u] " |
1718 | "skbaddr %llx\n", skb, skb->data, skb->len, | |
1719 | (unsigned long long)bf->skbaddr); | |
aeae4ac9 FF |
1720 | |
1721 | if (dma_mapping_error(sc->dev, bf->skbaddr)) { | |
fa1c114f JS |
1722 | ATH5K_ERR(sc, "beacon DMA mapping failed\n"); |
1723 | return -EIO; | |
1724 | } | |
1725 | ||
1726 | ds = bf->desc; | |
2bed03eb | 1727 | antenna = ah->ah_tx_ant; |
fa1c114f JS |
1728 | |
1729 | flags = AR5K_TXDESC_NOACK; | |
05c914fe | 1730 | if (sc->opmode == NL80211_IFTYPE_ADHOC && ath5k_hw_hasveol(ah)) { |
fa1c114f JS |
1731 | ds->ds_link = bf->daddr; /* self-linked */ |
1732 | flags |= AR5K_TXDESC_VEOL; | |
2bed03eb | 1733 | } else |
fa1c114f | 1734 | ds->ds_link = 0; |
2bed03eb NK |
1735 | |
1736 | /* | |
1737 | * If we use multiple antennas on AP and use | |
1738 | * the Sectored AP scenario, switch antenna every | |
1739 | * 4 beacons to make sure everybody hears our AP. | |
1740 | * When a client tries to associate, hw will keep | |
1741 | * track of the tx antenna to be used for this client | |
1742 | * automaticaly, based on ACKed packets. | |
1743 | * | |
1744 | * Note: AP still listens and transmits RTS on the | |
1745 | * default antenna which is supposed to be an omni. | |
1746 | * | |
1747 | * Note2: On sectored scenarios it's possible to have | |
a180a130 BC |
1748 | * multiple antennas (1 omni -- the default -- and 14 |
1749 | * sectors), so if we choose to actually support this | |
1750 | * mode, we need to allow the user to set how many antennas | |
1751 | * we have and tweak the code below to send beacons | |
1752 | * on all of them. | |
2bed03eb NK |
1753 | */ |
1754 | if (ah->ah_ant_mode == AR5K_ANTMODE_SECTOR_AP) | |
1755 | antenna = sc->bsent & 4 ? 2 : 1; | |
1756 | ||
fa1c114f | 1757 | |
8f655dde NK |
1758 | /* FIXME: If we are in g mode and rate is a CCK rate |
1759 | * subtract ah->ah_txpower.txp_cck_ofdm_pwr_delta | |
1760 | * from tx power (value is in dB units already) */ | |
fa1c114f | 1761 | ds->ds_data = bf->skbaddr; |
281c56dd | 1762 | ret = ah->ah_setup_tx_desc(ah, ds, skb->len, |
8127fbdc | 1763 | ieee80211_get_hdrlen_from_skb(skb), padsize, |
400ec45a | 1764 | AR5K_PKT_TYPE_BEACON, (sc->power_level * 2), |
e039fa4a | 1765 | ieee80211_get_tx_rate(sc->hw, info)->hw_value, |
2e92e6f2 | 1766 | 1, AR5K_TXKEYIX_INVALID, |
400ec45a | 1767 | antenna, flags, 0, 0); |
fa1c114f JS |
1768 | if (ret) |
1769 | goto err_unmap; | |
1770 | ||
1771 | return 0; | |
1772 | err_unmap: | |
aeae4ac9 | 1773 | dma_unmap_single(sc->dev, bf->skbaddr, skb->len, DMA_TO_DEVICE); |
fa1c114f JS |
1774 | return ret; |
1775 | } | |
1776 | ||
8a63facc BC |
1777 | /* |
1778 | * Updates the beacon that is sent by ath5k_beacon_send. For adhoc, | |
1779 | * this is called only once at config_bss time, for AP we do it every | |
1780 | * SWBA interrupt so that the TIM will reflect buffered frames. | |
1781 | * | |
1782 | * Called with the beacon lock. | |
1783 | */ | |
cd2c5486 | 1784 | int |
8a63facc BC |
1785 | ath5k_beacon_update(struct ieee80211_hw *hw, struct ieee80211_vif *vif) |
1786 | { | |
1787 | int ret; | |
1788 | struct ath5k_softc *sc = hw->priv; | |
b1ae1edf | 1789 | struct ath5k_vif *avf = (void *)vif->drv_priv; |
8a63facc BC |
1790 | struct sk_buff *skb; |
1791 | ||
1792 | if (WARN_ON(!vif)) { | |
1793 | ret = -EINVAL; | |
1794 | goto out; | |
1795 | } | |
1796 | ||
1797 | skb = ieee80211_beacon_get(hw, vif); | |
1798 | ||
1799 | if (!skb) { | |
1800 | ret = -ENOMEM; | |
1801 | goto out; | |
1802 | } | |
1803 | ||
b1ae1edf BG |
1804 | ath5k_txbuf_free_skb(sc, avf->bbuf); |
1805 | avf->bbuf->skb = skb; | |
1806 | ret = ath5k_beacon_setup(sc, avf->bbuf); | |
8a63facc | 1807 | if (ret) |
b1ae1edf | 1808 | avf->bbuf->skb = NULL; |
8a63facc BC |
1809 | out: |
1810 | return ret; | |
1811 | } | |
1812 | ||
fa1c114f JS |
1813 | /* |
1814 | * Transmit a beacon frame at SWBA. Dynamic updates to the | |
1815 | * frame contents are done as needed and the slot time is | |
1816 | * also adjusted based on current state. | |
1817 | * | |
5faaff74 BC |
1818 | * This is called from software irq context (beacontq tasklets) |
1819 | * or user context from ath5k_beacon_config. | |
fa1c114f JS |
1820 | */ |
1821 | static void | |
1822 | ath5k_beacon_send(struct ath5k_softc *sc) | |
1823 | { | |
fa1c114f | 1824 | struct ath5k_hw *ah = sc->ah; |
b1ae1edf BG |
1825 | struct ieee80211_vif *vif; |
1826 | struct ath5k_vif *avf; | |
1827 | struct ath5k_buf *bf; | |
cec8db23 | 1828 | struct sk_buff *skb; |
fa1c114f | 1829 | |
be9b7259 | 1830 | ATH5K_DBG_UNLIMIT(sc, ATH5K_DEBUG_BEACON, "in beacon_send\n"); |
fa1c114f | 1831 | |
fa1c114f JS |
1832 | /* |
1833 | * Check if the previous beacon has gone out. If | |
a180a130 | 1834 | * not, don't don't try to post another: skip this |
fa1c114f JS |
1835 | * period and wait for the next. Missed beacons |
1836 | * indicate a problem and should not occur. If we | |
1837 | * miss too many consecutive beacons reset the device. | |
1838 | */ | |
1839 | if (unlikely(ath5k_hw_num_tx_pending(ah, sc->bhalq) != 0)) { | |
1840 | sc->bmisscount++; | |
be9b7259 | 1841 | ATH5K_DBG(sc, ATH5K_DEBUG_BEACON, |
fa1c114f | 1842 | "missed %u consecutive beacons\n", sc->bmisscount); |
428cbd4f | 1843 | if (sc->bmisscount > 10) { /* NB: 10 is a guess */ |
be9b7259 | 1844 | ATH5K_DBG(sc, ATH5K_DEBUG_BEACON, |
fa1c114f JS |
1845 | "stuck beacon time (%u missed)\n", |
1846 | sc->bmisscount); | |
8d67a031 BR |
1847 | ATH5K_DBG(sc, ATH5K_DEBUG_RESET, |
1848 | "stuck beacon, resetting\n"); | |
5faaff74 | 1849 | ieee80211_queue_work(sc->hw, &sc->reset_work); |
fa1c114f JS |
1850 | } |
1851 | return; | |
1852 | } | |
1853 | if (unlikely(sc->bmisscount != 0)) { | |
be9b7259 | 1854 | ATH5K_DBG(sc, ATH5K_DEBUG_BEACON, |
fa1c114f JS |
1855 | "resume beacon xmit after %u misses\n", |
1856 | sc->bmisscount); | |
1857 | sc->bmisscount = 0; | |
1858 | } | |
1859 | ||
b93996cf JC |
1860 | if ((sc->opmode == NL80211_IFTYPE_AP && sc->num_ap_vifs > 1) || |
1861 | sc->opmode == NL80211_IFTYPE_MESH_POINT) { | |
b1ae1edf BG |
1862 | u64 tsf = ath5k_hw_get_tsf64(ah); |
1863 | u32 tsftu = TSF_TO_TU(tsf); | |
1864 | int slot = ((tsftu % sc->bintval) * ATH_BCBUF) / sc->bintval; | |
1865 | vif = sc->bslot[(slot + 1) % ATH_BCBUF]; | |
1866 | ATH5K_DBG(sc, ATH5K_DEBUG_BEACON, | |
1867 | "tsf %llx tsftu %x intval %u slot %u vif %p\n", | |
1868 | (unsigned long long)tsf, tsftu, sc->bintval, slot, vif); | |
1869 | } else /* only one interface */ | |
1870 | vif = sc->bslot[0]; | |
1871 | ||
1872 | if (!vif) | |
1873 | return; | |
1874 | ||
1875 | avf = (void *)vif->drv_priv; | |
1876 | bf = avf->bbuf; | |
1877 | if (unlikely(bf->skb == NULL || sc->opmode == NL80211_IFTYPE_STATION || | |
1878 | sc->opmode == NL80211_IFTYPE_MONITOR)) { | |
1879 | ATH5K_WARN(sc, "bf=%p bf_skb=%p\n", bf, bf ? bf->skb : NULL); | |
1880 | return; | |
1881 | } | |
1882 | ||
fa1c114f JS |
1883 | /* |
1884 | * Stop any current dma and put the new frame on the queue. | |
1885 | * This should never fail since we check above that no frames | |
1886 | * are still pending on the queue. | |
1887 | */ | |
14fae2d4 | 1888 | if (unlikely(ath5k_hw_stop_beacon_queue(ah, sc->bhalq))) { |
428cbd4f | 1889 | ATH5K_WARN(sc, "beacon queue %u didn't start/stop ?\n", sc->bhalq); |
fa1c114f JS |
1890 | /* NB: hw still stops DMA, so proceed */ |
1891 | } | |
fa1c114f | 1892 | |
d82b577b JC |
1893 | /* refresh the beacon for AP or MESH mode */ |
1894 | if (sc->opmode == NL80211_IFTYPE_AP || | |
1895 | sc->opmode == NL80211_IFTYPE_MESH_POINT) | |
b1ae1edf | 1896 | ath5k_beacon_update(sc->hw, vif); |
1071db86 | 1897 | |
0e472252 BC |
1898 | trace_ath5k_tx(sc, bf->skb, &sc->txqs[sc->bhalq]); |
1899 | ||
c6e387a2 NK |
1900 | ath5k_hw_set_txdp(ah, sc->bhalq, bf->daddr); |
1901 | ath5k_hw_start_tx_dma(ah, sc->bhalq); | |
be9b7259 | 1902 | ATH5K_DBG(sc, ATH5K_DEBUG_BEACON, "TXDP[%u] = %llx (%p)\n", |
fa1c114f JS |
1903 | sc->bhalq, (unsigned long long)bf->daddr, bf->desc); |
1904 | ||
b1ae1edf | 1905 | skb = ieee80211_get_buffered_bc(sc->hw, vif); |
cec8db23 BC |
1906 | while (skb) { |
1907 | ath5k_tx_queue(sc->hw, skb, sc->cabq); | |
b1ae1edf | 1908 | skb = ieee80211_get_buffered_bc(sc->hw, vif); |
cec8db23 BC |
1909 | } |
1910 | ||
fa1c114f JS |
1911 | sc->bsent++; |
1912 | } | |
1913 | ||
9804b98d BR |
1914 | /** |
1915 | * ath5k_beacon_update_timers - update beacon timers | |
1916 | * | |
1917 | * @sc: struct ath5k_softc pointer we are operating on | |
1918 | * @bc_tsf: the timestamp of the beacon. 0 to reset the TSF. -1 to perform a | |
1919 | * beacon timer update based on the current HW TSF. | |
1920 | * | |
1921 | * Calculate the next target beacon transmit time (TBTT) based on the timestamp | |
1922 | * of a received beacon or the current local hardware TSF and write it to the | |
1923 | * beacon timer registers. | |
1924 | * | |
1925 | * This is called in a variety of situations, e.g. when a beacon is received, | |
6ba81c2c | 1926 | * when a TSF update has been detected, but also when an new IBSS is created or |
9804b98d BR |
1927 | * when we otherwise know we have to update the timers, but we keep it in this |
1928 | * function to have it all together in one place. | |
1929 | */ | |
cd2c5486 | 1930 | void |
9804b98d | 1931 | ath5k_beacon_update_timers(struct ath5k_softc *sc, u64 bc_tsf) |
fa1c114f JS |
1932 | { |
1933 | struct ath5k_hw *ah = sc->ah; | |
9804b98d BR |
1934 | u32 nexttbtt, intval, hw_tu, bc_tu; |
1935 | u64 hw_tsf; | |
fa1c114f JS |
1936 | |
1937 | intval = sc->bintval & AR5K_BEACON_PERIOD; | |
b1ae1edf BG |
1938 | if (sc->opmode == NL80211_IFTYPE_AP && sc->num_ap_vifs > 1) { |
1939 | intval /= ATH_BCBUF; /* staggered multi-bss beacons */ | |
1940 | if (intval < 15) | |
1941 | ATH5K_WARN(sc, "intval %u is too low, min 15\n", | |
1942 | intval); | |
1943 | } | |
fa1c114f JS |
1944 | if (WARN_ON(!intval)) |
1945 | return; | |
1946 | ||
9804b98d BR |
1947 | /* beacon TSF converted to TU */ |
1948 | bc_tu = TSF_TO_TU(bc_tsf); | |
fa1c114f | 1949 | |
9804b98d BR |
1950 | /* current TSF converted to TU */ |
1951 | hw_tsf = ath5k_hw_get_tsf64(ah); | |
1952 | hw_tu = TSF_TO_TU(hw_tsf); | |
fa1c114f | 1953 | |
11f21df3 BR |
1954 | #define FUDGE AR5K_TUNE_SW_BEACON_RESP + 3 |
1955 | /* We use FUDGE to make sure the next TBTT is ahead of the current TU. | |
25985edc | 1956 | * Since we later subtract AR5K_TUNE_SW_BEACON_RESP (10) in the timer |
11f21df3 BR |
1957 | * configuration we need to make sure it is bigger than that. */ |
1958 | ||
9804b98d BR |
1959 | if (bc_tsf == -1) { |
1960 | /* | |
1961 | * no beacons received, called internally. | |
1962 | * just need to refresh timers based on HW TSF. | |
1963 | */ | |
1964 | nexttbtt = roundup(hw_tu + FUDGE, intval); | |
1965 | } else if (bc_tsf == 0) { | |
1966 | /* | |
1967 | * no beacon received, probably called by ath5k_reset_tsf(). | |
1968 | * reset TSF to start with 0. | |
1969 | */ | |
1970 | nexttbtt = intval; | |
1971 | intval |= AR5K_BEACON_RESET_TSF; | |
1972 | } else if (bc_tsf > hw_tsf) { | |
1973 | /* | |
25985edc | 1974 | * beacon received, SW merge happened but HW TSF not yet updated. |
9804b98d BR |
1975 | * not possible to reconfigure timers yet, but next time we |
1976 | * receive a beacon with the same BSSID, the hardware will | |
1977 | * automatically update the TSF and then we need to reconfigure | |
1978 | * the timers. | |
1979 | */ | |
1980 | ATH5K_DBG_UNLIMIT(sc, ATH5K_DEBUG_BEACON, | |
1981 | "need to wait for HW TSF sync\n"); | |
1982 | return; | |
1983 | } else { | |
1984 | /* | |
1985 | * most important case for beacon synchronization between STA. | |
1986 | * | |
1987 | * beacon received and HW TSF has been already updated by HW. | |
1988 | * update next TBTT based on the TSF of the beacon, but make | |
1989 | * sure it is ahead of our local TSF timer. | |
1990 | */ | |
1991 | nexttbtt = bc_tu + roundup(hw_tu + FUDGE - bc_tu, intval); | |
1992 | } | |
1993 | #undef FUDGE | |
fa1c114f | 1994 | |
036cd1ec BR |
1995 | sc->nexttbtt = nexttbtt; |
1996 | ||
fa1c114f | 1997 | intval |= AR5K_BEACON_ENA; |
fa1c114f | 1998 | ath5k_hw_init_beacon(ah, nexttbtt, intval); |
9804b98d BR |
1999 | |
2000 | /* | |
2001 | * debugging output last in order to preserve the time critical aspect | |
2002 | * of this function | |
2003 | */ | |
2004 | if (bc_tsf == -1) | |
2005 | ATH5K_DBG_UNLIMIT(sc, ATH5K_DEBUG_BEACON, | |
2006 | "reconfigured timers based on HW TSF\n"); | |
2007 | else if (bc_tsf == 0) | |
2008 | ATH5K_DBG_UNLIMIT(sc, ATH5K_DEBUG_BEACON, | |
2009 | "reset HW TSF and timers\n"); | |
2010 | else | |
2011 | ATH5K_DBG_UNLIMIT(sc, ATH5K_DEBUG_BEACON, | |
2012 | "updated timers based on beacon TSF\n"); | |
2013 | ||
2014 | ATH5K_DBG_UNLIMIT(sc, ATH5K_DEBUG_BEACON, | |
04f93a87 DM |
2015 | "bc_tsf %llx hw_tsf %llx bc_tu %u hw_tu %u nexttbtt %u\n", |
2016 | (unsigned long long) bc_tsf, | |
2017 | (unsigned long long) hw_tsf, bc_tu, hw_tu, nexttbtt); | |
9804b98d BR |
2018 | ATH5K_DBG_UNLIMIT(sc, ATH5K_DEBUG_BEACON, "intval %u %s %s\n", |
2019 | intval & AR5K_BEACON_PERIOD, | |
2020 | intval & AR5K_BEACON_ENA ? "AR5K_BEACON_ENA" : "", | |
2021 | intval & AR5K_BEACON_RESET_TSF ? "AR5K_BEACON_RESET_TSF" : ""); | |
fa1c114f JS |
2022 | } |
2023 | ||
036cd1ec BR |
2024 | /** |
2025 | * ath5k_beacon_config - Configure the beacon queues and interrupts | |
2026 | * | |
2027 | * @sc: struct ath5k_softc pointer we are operating on | |
fa1c114f | 2028 | * |
036cd1ec | 2029 | * In IBSS mode we use a self-linked tx descriptor if possible. We enable SWBA |
6ba81c2c | 2030 | * interrupts to detect TSF updates only. |
fa1c114f | 2031 | */ |
cd2c5486 | 2032 | void |
fa1c114f JS |
2033 | ath5k_beacon_config(struct ath5k_softc *sc) |
2034 | { | |
2035 | struct ath5k_hw *ah = sc->ah; | |
b5f03956 | 2036 | unsigned long flags; |
fa1c114f | 2037 | |
21800491 | 2038 | spin_lock_irqsave(&sc->block, flags); |
fa1c114f | 2039 | sc->bmisscount = 0; |
dc1968e7 | 2040 | sc->imask &= ~(AR5K_INT_BMISS | AR5K_INT_SWBA); |
fa1c114f | 2041 | |
21800491 | 2042 | if (sc->enable_beacon) { |
fa1c114f | 2043 | /* |
036cd1ec BR |
2044 | * In IBSS mode we use a self-linked tx descriptor and let the |
2045 | * hardware send the beacons automatically. We have to load it | |
fa1c114f | 2046 | * only once here. |
036cd1ec | 2047 | * We use the SWBA interrupt only to keep track of the beacon |
6ba81c2c | 2048 | * timers in order to detect automatic TSF updates. |
fa1c114f JS |
2049 | */ |
2050 | ath5k_beaconq_config(sc); | |
fa1c114f | 2051 | |
036cd1ec BR |
2052 | sc->imask |= AR5K_INT_SWBA; |
2053 | ||
da966bca | 2054 | if (sc->opmode == NL80211_IFTYPE_ADHOC) { |
21800491 | 2055 | if (ath5k_hw_hasveol(ah)) |
da966bca | 2056 | ath5k_beacon_send(sc); |
da966bca JS |
2057 | } else |
2058 | ath5k_beacon_update_timers(sc, -1); | |
21800491 | 2059 | } else { |
14fae2d4 | 2060 | ath5k_hw_stop_beacon_queue(sc->ah, sc->bhalq); |
fa1c114f | 2061 | } |
fa1c114f | 2062 | |
c6e387a2 | 2063 | ath5k_hw_set_imr(ah, sc->imask); |
21800491 BC |
2064 | mmiowb(); |
2065 | spin_unlock_irqrestore(&sc->block, flags); | |
fa1c114f JS |
2066 | } |
2067 | ||
428cbd4f NK |
2068 | static void ath5k_tasklet_beacon(unsigned long data) |
2069 | { | |
2070 | struct ath5k_softc *sc = (struct ath5k_softc *) data; | |
2071 | ||
2072 | /* | |
2073 | * Software beacon alert--time to send a beacon. | |
2074 | * | |
2075 | * In IBSS mode we use this interrupt just to | |
2076 | * keep track of the next TBTT (target beacon | |
2077 | * transmission time) in order to detect wether | |
2078 | * automatic TSF updates happened. | |
2079 | */ | |
2080 | if (sc->opmode == NL80211_IFTYPE_ADHOC) { | |
2081 | /* XXX: only if VEOL suppported */ | |
2082 | u64 tsf = ath5k_hw_get_tsf64(sc->ah); | |
2083 | sc->nexttbtt += sc->bintval; | |
2084 | ATH5K_DBG(sc, ATH5K_DEBUG_BEACON, | |
2085 | "SWBA nexttbtt: %x hw_tu: %x " | |
2086 | "TSF: %llx\n", | |
2087 | sc->nexttbtt, | |
2088 | TSF_TO_TU(tsf), | |
2089 | (unsigned long long) tsf); | |
2090 | } else { | |
2091 | spin_lock(&sc->block); | |
2092 | ath5k_beacon_send(sc); | |
2093 | spin_unlock(&sc->block); | |
2094 | } | |
2095 | } | |
2096 | ||
fa1c114f JS |
2097 | |
2098 | /********************\ | |
2099 | * Interrupt handling * | |
2100 | \********************/ | |
2101 | ||
6a8a3f6b BR |
2102 | static void |
2103 | ath5k_intr_calibration_poll(struct ath5k_hw *ah) | |
2104 | { | |
2111ac0d BR |
2105 | if (time_is_before_eq_jiffies(ah->ah_cal_next_ani) && |
2106 | !(ah->ah_cal_mask & AR5K_CALIBRATION_FULL)) { | |
2107 | /* run ANI only when full calibration is not active */ | |
2108 | ah->ah_cal_next_ani = jiffies + | |
2109 | msecs_to_jiffies(ATH5K_TUNE_CALIBRATION_INTERVAL_ANI); | |
2110 | tasklet_schedule(&ah->ah_sc->ani_tasklet); | |
2111 | ||
2112 | } else if (time_is_before_eq_jiffies(ah->ah_cal_next_full)) { | |
6a8a3f6b BR |
2113 | ah->ah_cal_next_full = jiffies + |
2114 | msecs_to_jiffies(ATH5K_TUNE_CALIBRATION_INTERVAL_FULL); | |
2115 | tasklet_schedule(&ah->ah_sc->calib); | |
2116 | } | |
2117 | /* we could use SWI to generate enough interrupts to meet our | |
2118 | * calibration interval requirements, if necessary: | |
2119 | * AR5K_REG_ENABLE_BITS(ah, AR5K_CR, AR5K_CR_SWI); */ | |
2120 | } | |
2121 | ||
132b1c3e | 2122 | irqreturn_t |
fa1c114f JS |
2123 | ath5k_intr(int irq, void *dev_id) |
2124 | { | |
2125 | struct ath5k_softc *sc = dev_id; | |
2126 | struct ath5k_hw *ah = sc->ah; | |
2127 | enum ath5k_int status; | |
2128 | unsigned int counter = 1000; | |
2129 | ||
2130 | if (unlikely(test_bit(ATH_STAT_INVALID, sc->status) || | |
4cebb34c FF |
2131 | ((ath5k_get_bus_type(ah) != ATH_AHB) && |
2132 | !ath5k_hw_is_intr_pending(ah)))) | |
fa1c114f JS |
2133 | return IRQ_NONE; |
2134 | ||
2135 | do { | |
fa1c114f JS |
2136 | ath5k_hw_get_isr(ah, &status); /* NB: clears IRQ too */ |
2137 | ATH5K_DBG(sc, ATH5K_DEBUG_INTR, "status 0x%x/0x%x\n", | |
2138 | status, sc->imask); | |
fa1c114f JS |
2139 | if (unlikely(status & AR5K_INT_FATAL)) { |
2140 | /* | |
2141 | * Fatal errors are unrecoverable. | |
2142 | * Typically these are caused by DMA errors. | |
2143 | */ | |
8d67a031 BR |
2144 | ATH5K_DBG(sc, ATH5K_DEBUG_RESET, |
2145 | "fatal int, resetting\n"); | |
5faaff74 | 2146 | ieee80211_queue_work(sc->hw, &sc->reset_work); |
fa1c114f | 2147 | } else if (unlikely(status & AR5K_INT_RXORN)) { |
87d77c4e BR |
2148 | /* |
2149 | * Receive buffers are full. Either the bus is busy or | |
2150 | * the CPU is not fast enough to process all received | |
2151 | * frames. | |
2152 | * Older chipsets need a reset to come out of this | |
2153 | * condition, but we treat it as RX for newer chips. | |
2154 | * We don't know exactly which versions need a reset - | |
2155 | * this guess is copied from the HAL. | |
2156 | */ | |
2157 | sc->stats.rxorn_intr++; | |
8d67a031 BR |
2158 | if (ah->ah_mac_srev < AR5K_SREV_AR5212) { |
2159 | ATH5K_DBG(sc, ATH5K_DEBUG_RESET, | |
2160 | "rx overrun, resetting\n"); | |
5faaff74 | 2161 | ieee80211_queue_work(sc->hw, &sc->reset_work); |
8d67a031 | 2162 | } |
87d77c4e BR |
2163 | else |
2164 | tasklet_schedule(&sc->rxtq); | |
fa1c114f JS |
2165 | } else { |
2166 | if (status & AR5K_INT_SWBA) { | |
56d2ac76 | 2167 | tasklet_hi_schedule(&sc->beacontq); |
fa1c114f JS |
2168 | } |
2169 | if (status & AR5K_INT_RXEOL) { | |
2170 | /* | |
2171 | * NB: the hardware should re-read the link when | |
2172 | * RXE bit is written, but it doesn't work at | |
2173 | * least on older hardware revs. | |
2174 | */ | |
b3f194e5 | 2175 | sc->stats.rxeol_intr++; |
fa1c114f JS |
2176 | } |
2177 | if (status & AR5K_INT_TXURN) { | |
2178 | /* bump tx trigger level */ | |
2179 | ath5k_hw_update_tx_triglevel(ah, true); | |
2180 | } | |
4c674c60 | 2181 | if (status & (AR5K_INT_RXOK | AR5K_INT_RXERR)) |
fa1c114f | 2182 | tasklet_schedule(&sc->rxtq); |
4c674c60 NK |
2183 | if (status & (AR5K_INT_TXOK | AR5K_INT_TXDESC |
2184 | | AR5K_INT_TXERR | AR5K_INT_TXEOL)) | |
fa1c114f JS |
2185 | tasklet_schedule(&sc->txtq); |
2186 | if (status & AR5K_INT_BMISS) { | |
1e3e6e8f | 2187 | /* TODO */ |
fa1c114f JS |
2188 | } |
2189 | if (status & AR5K_INT_MIB) { | |
2111ac0d | 2190 | sc->stats.mib_intr++; |
495391d7 | 2191 | ath5k_hw_update_mib_counters(ah); |
2111ac0d | 2192 | ath5k_ani_mib_intr(ah); |
fa1c114f | 2193 | } |
e6a3b616 | 2194 | if (status & AR5K_INT_GPIO) |
e6a3b616 | 2195 | tasklet_schedule(&sc->rf_kill.toggleq); |
a6ae0716 | 2196 | |
fa1c114f | 2197 | } |
4cebb34c FF |
2198 | |
2199 | if (ath5k_get_bus_type(ah) == ATH_AHB) | |
2200 | break; | |
2201 | ||
2516baa6 | 2202 | } while (ath5k_hw_is_intr_pending(ah) && --counter > 0); |
fa1c114f JS |
2203 | |
2204 | if (unlikely(!counter)) | |
2205 | ATH5K_WARN(sc, "too many interrupts, giving up for now\n"); | |
2206 | ||
6a8a3f6b | 2207 | ath5k_intr_calibration_poll(ah); |
6e220662 | 2208 | |
fa1c114f JS |
2209 | return IRQ_HANDLED; |
2210 | } | |
2211 | ||
fa1c114f JS |
2212 | /* |
2213 | * Periodically recalibrate the PHY to account | |
2214 | * for temperature/environment changes. | |
2215 | */ | |
2216 | static void | |
6e220662 | 2217 | ath5k_tasklet_calibrate(unsigned long data) |
fa1c114f JS |
2218 | { |
2219 | struct ath5k_softc *sc = (void *)data; | |
2220 | struct ath5k_hw *ah = sc->ah; | |
2221 | ||
6e220662 | 2222 | /* Only full calibration for now */ |
e65e1d77 | 2223 | ah->ah_cal_mask |= AR5K_CALIBRATION_FULL; |
6e220662 | 2224 | |
fa1c114f | 2225 | ATH5K_DBG(sc, ATH5K_DEBUG_CALIBRATE, "channel %u/%x\n", |
400ec45a LR |
2226 | ieee80211_frequency_to_channel(sc->curchan->center_freq), |
2227 | sc->curchan->hw_value); | |
fa1c114f | 2228 | |
6f3b414a | 2229 | if (ath5k_hw_gainf_calibrate(ah) == AR5K_RFGAIN_NEED_CHANGE) { |
fa1c114f JS |
2230 | /* |
2231 | * Rfgain is out of bounds, reset the chip | |
2232 | * to load new gain values. | |
2233 | */ | |
2234 | ATH5K_DBG(sc, ATH5K_DEBUG_RESET, "calibration, resetting\n"); | |
5faaff74 | 2235 | ieee80211_queue_work(sc->hw, &sc->reset_work); |
fa1c114f JS |
2236 | } |
2237 | if (ath5k_hw_phy_calibrate(ah, sc->curchan)) | |
2238 | ATH5K_ERR(sc, "calibration of channel %u failed\n", | |
400ec45a LR |
2239 | ieee80211_frequency_to_channel( |
2240 | sc->curchan->center_freq)); | |
fa1c114f | 2241 | |
0e8e02dd | 2242 | /* Noise floor calibration interrupts rx/tx path while I/Q calibration |
651d9375 BR |
2243 | * doesn't. |
2244 | * TODO: We should stop TX here, so that it doesn't interfere. | |
2245 | * Note that stopping the queues is not enough to stop TX! */ | |
afe86286 BR |
2246 | if (time_is_before_eq_jiffies(ah->ah_cal_next_nf)) { |
2247 | ah->ah_cal_next_nf = jiffies + | |
2248 | msecs_to_jiffies(ATH5K_TUNE_CALIBRATION_INTERVAL_NF); | |
afe86286 | 2249 | ath5k_hw_update_noise_floor(ah); |
afe86286 | 2250 | } |
6e220662 | 2251 | |
e65e1d77 | 2252 | ah->ah_cal_mask &= ~AR5K_CALIBRATION_FULL; |
fa1c114f JS |
2253 | } |
2254 | ||
2255 | ||
2111ac0d BR |
2256 | static void |
2257 | ath5k_tasklet_ani(unsigned long data) | |
2258 | { | |
2259 | struct ath5k_softc *sc = (void *)data; | |
2260 | struct ath5k_hw *ah = sc->ah; | |
2261 | ||
2262 | ah->ah_cal_mask |= AR5K_CALIBRATION_ANI; | |
2263 | ath5k_ani_calibration(ah); | |
2264 | ah->ah_cal_mask &= ~AR5K_CALIBRATION_ANI; | |
fa1c114f JS |
2265 | } |
2266 | ||
2267 | ||
4edd761f BR |
2268 | static void |
2269 | ath5k_tx_complete_poll_work(struct work_struct *work) | |
2270 | { | |
2271 | struct ath5k_softc *sc = container_of(work, struct ath5k_softc, | |
2272 | tx_complete_work.work); | |
2273 | struct ath5k_txq *txq; | |
2274 | int i; | |
2275 | bool needreset = false; | |
2276 | ||
599b13ad BC |
2277 | mutex_lock(&sc->lock); |
2278 | ||
4edd761f BR |
2279 | for (i = 0; i < ARRAY_SIZE(sc->txqs); i++) { |
2280 | if (sc->txqs[i].setup) { | |
2281 | txq = &sc->txqs[i]; | |
2282 | spin_lock_bh(&txq->lock); | |
23413296 | 2283 | if (txq->txq_len > 1) { |
4edd761f BR |
2284 | if (txq->txq_poll_mark) { |
2285 | ATH5K_DBG(sc, ATH5K_DEBUG_XMIT, | |
2286 | "TX queue stuck %d\n", | |
2287 | txq->qnum); | |
2288 | needreset = true; | |
923e5b3d | 2289 | txq->txq_stuck++; |
4edd761f BR |
2290 | spin_unlock_bh(&txq->lock); |
2291 | break; | |
2292 | } else { | |
2293 | txq->txq_poll_mark = true; | |
2294 | } | |
2295 | } | |
2296 | spin_unlock_bh(&txq->lock); | |
2297 | } | |
2298 | } | |
2299 | ||
2300 | if (needreset) { | |
2301 | ATH5K_DBG(sc, ATH5K_DEBUG_RESET, | |
2302 | "TX queues stuck, resetting\n"); | |
8aec7af9 | 2303 | ath5k_reset(sc, NULL, true); |
4edd761f BR |
2304 | } |
2305 | ||
599b13ad BC |
2306 | mutex_unlock(&sc->lock); |
2307 | ||
4edd761f BR |
2308 | ieee80211_queue_delayed_work(sc->hw, &sc->tx_complete_work, |
2309 | msecs_to_jiffies(ATH5K_TX_COMPLETE_POLL_INT)); | |
2310 | } | |
2311 | ||
2312 | ||
8a63facc BC |
2313 | /*************************\ |
2314 | * Initialization routines * | |
2315 | \*************************/ | |
fa1c114f | 2316 | |
132b1c3e FF |
2317 | int |
2318 | ath5k_init_softc(struct ath5k_softc *sc, const struct ath_bus_ops *bus_ops) | |
2319 | { | |
2320 | struct ieee80211_hw *hw = sc->hw; | |
2321 | struct ath_common *common; | |
2322 | int ret; | |
2323 | int csz; | |
2324 | ||
2325 | /* Initialize driver private data */ | |
2326 | SET_IEEE80211_DEV(hw, sc->dev); | |
2327 | hw->flags = IEEE80211_HW_RX_INCLUDES_FCS | | |
b9e61f11 NK |
2328 | IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING | |
2329 | IEEE80211_HW_SIGNAL_DBM | | |
2330 | IEEE80211_HW_REPORTS_TX_ACK_STATUS; | |
132b1c3e FF |
2331 | |
2332 | hw->wiphy->interface_modes = | |
2333 | BIT(NL80211_IFTYPE_AP) | | |
2334 | BIT(NL80211_IFTYPE_STATION) | | |
2335 | BIT(NL80211_IFTYPE_ADHOC) | | |
2336 | BIT(NL80211_IFTYPE_MESH_POINT); | |
2337 | ||
3de135db BR |
2338 | /* both antennas can be configured as RX or TX */ |
2339 | hw->wiphy->available_antennas_tx = 0x3; | |
2340 | hw->wiphy->available_antennas_rx = 0x3; | |
2341 | ||
132b1c3e FF |
2342 | hw->extra_tx_headroom = 2; |
2343 | hw->channel_change_time = 5000; | |
2344 | ||
2345 | /* | |
2346 | * Mark the device as detached to avoid processing | |
2347 | * interrupts until setup is complete. | |
2348 | */ | |
2349 | __set_bit(ATH_STAT_INVALID, sc->status); | |
2350 | ||
2351 | sc->opmode = NL80211_IFTYPE_STATION; | |
2352 | sc->bintval = 1000; | |
2353 | mutex_init(&sc->lock); | |
2354 | spin_lock_init(&sc->rxbuflock); | |
2355 | spin_lock_init(&sc->txbuflock); | |
2356 | spin_lock_init(&sc->block); | |
2357 | ||
2358 | ||
2359 | /* Setup interrupt handler */ | |
2360 | ret = request_irq(sc->irq, ath5k_intr, IRQF_SHARED, "ath", sc); | |
2361 | if (ret) { | |
2362 | ATH5K_ERR(sc, "request_irq failed\n"); | |
2363 | goto err; | |
2364 | } | |
2365 | ||
2366 | /* If we passed the test, malloc an ath5k_hw struct */ | |
2367 | sc->ah = kzalloc(sizeof(struct ath5k_hw), GFP_KERNEL); | |
2368 | if (!sc->ah) { | |
2369 | ret = -ENOMEM; | |
2370 | ATH5K_ERR(sc, "out of memory\n"); | |
2371 | goto err_irq; | |
2372 | } | |
2373 | ||
2374 | sc->ah->ah_sc = sc; | |
2375 | sc->ah->ah_iobase = sc->iobase; | |
2376 | common = ath5k_hw_common(sc->ah); | |
2377 | common->ops = &ath5k_common_ops; | |
2378 | common->bus_ops = bus_ops; | |
2379 | common->ah = sc->ah; | |
2380 | common->hw = hw; | |
2381 | common->priv = sc; | |
2382 | ||
2383 | /* | |
2384 | * Cache line size is used to size and align various | |
2385 | * structures used to communicate with the hardware. | |
2386 | */ | |
2387 | ath5k_read_cachesize(common, &csz); | |
2388 | common->cachelsz = csz << 2; /* convert to bytes */ | |
2389 | ||
2390 | spin_lock_init(&common->cc_lock); | |
2391 | ||
2392 | /* Initialize device */ | |
2393 | ret = ath5k_hw_init(sc); | |
2394 | if (ret) | |
2395 | goto err_free_ah; | |
2396 | ||
2397 | /* set up multi-rate retry capabilities */ | |
2398 | if (sc->ah->ah_version == AR5K_AR5212) { | |
2399 | hw->max_rates = 4; | |
76a9f6fd BR |
2400 | hw->max_rate_tries = max(AR5K_INIT_RETRY_SHORT, |
2401 | AR5K_INIT_RETRY_LONG); | |
132b1c3e FF |
2402 | } |
2403 | ||
2404 | hw->vif_data_size = sizeof(struct ath5k_vif); | |
2405 | ||
2406 | /* Finish private driver data initialization */ | |
2407 | ret = ath5k_init(hw); | |
2408 | if (ret) | |
2409 | goto err_ah; | |
2410 | ||
2411 | ATH5K_INFO(sc, "Atheros AR%s chip found (MAC: 0x%x, PHY: 0x%x)\n", | |
2412 | ath5k_chip_name(AR5K_VERSION_MAC, sc->ah->ah_mac_srev), | |
2413 | sc->ah->ah_mac_srev, | |
2414 | sc->ah->ah_phy_revision); | |
2415 | ||
2416 | if (!sc->ah->ah_single_chip) { | |
2417 | /* Single chip radio (!RF5111) */ | |
2418 | if (sc->ah->ah_radio_5ghz_revision && | |
2419 | !sc->ah->ah_radio_2ghz_revision) { | |
2420 | /* No 5GHz support -> report 2GHz radio */ | |
2421 | if (!test_bit(AR5K_MODE_11A, | |
2422 | sc->ah->ah_capabilities.cap_mode)) { | |
2423 | ATH5K_INFO(sc, "RF%s 2GHz radio found (0x%x)\n", | |
2424 | ath5k_chip_name(AR5K_VERSION_RAD, | |
2425 | sc->ah->ah_radio_5ghz_revision), | |
2426 | sc->ah->ah_radio_5ghz_revision); | |
2427 | /* No 2GHz support (5110 and some | |
2428 | * 5Ghz only cards) -> report 5Ghz radio */ | |
2429 | } else if (!test_bit(AR5K_MODE_11B, | |
2430 | sc->ah->ah_capabilities.cap_mode)) { | |
2431 | ATH5K_INFO(sc, "RF%s 5GHz radio found (0x%x)\n", | |
2432 | ath5k_chip_name(AR5K_VERSION_RAD, | |
2433 | sc->ah->ah_radio_5ghz_revision), | |
2434 | sc->ah->ah_radio_5ghz_revision); | |
2435 | /* Multiband radio */ | |
2436 | } else { | |
2437 | ATH5K_INFO(sc, "RF%s multiband radio found" | |
2438 | " (0x%x)\n", | |
2439 | ath5k_chip_name(AR5K_VERSION_RAD, | |
2440 | sc->ah->ah_radio_5ghz_revision), | |
2441 | sc->ah->ah_radio_5ghz_revision); | |
2442 | } | |
2443 | } | |
2444 | /* Multi chip radio (RF5111 - RF2111) -> | |
2445 | * report both 2GHz/5GHz radios */ | |
2446 | else if (sc->ah->ah_radio_5ghz_revision && | |
2447 | sc->ah->ah_radio_2ghz_revision){ | |
2448 | ATH5K_INFO(sc, "RF%s 5GHz radio found (0x%x)\n", | |
2449 | ath5k_chip_name(AR5K_VERSION_RAD, | |
2450 | sc->ah->ah_radio_5ghz_revision), | |
2451 | sc->ah->ah_radio_5ghz_revision); | |
2452 | ATH5K_INFO(sc, "RF%s 2GHz radio found (0x%x)\n", | |
2453 | ath5k_chip_name(AR5K_VERSION_RAD, | |
2454 | sc->ah->ah_radio_2ghz_revision), | |
2455 | sc->ah->ah_radio_2ghz_revision); | |
2456 | } | |
2457 | } | |
2458 | ||
2459 | ath5k_debug_init_device(sc); | |
2460 | ||
2461 | /* ready to process interrupts */ | |
2462 | __clear_bit(ATH_STAT_INVALID, sc->status); | |
2463 | ||
2464 | return 0; | |
2465 | err_ah: | |
2466 | ath5k_hw_deinit(sc->ah); | |
2467 | err_free_ah: | |
2468 | kfree(sc->ah); | |
2469 | err_irq: | |
2470 | free_irq(sc->irq, sc); | |
2471 | err: | |
2472 | return ret; | |
2473 | } | |
2474 | ||
fa1c114f | 2475 | static int |
8a63facc | 2476 | ath5k_stop_locked(struct ath5k_softc *sc) |
cec8db23 | 2477 | { |
8a63facc | 2478 | struct ath5k_hw *ah = sc->ah; |
cec8db23 | 2479 | |
8a63facc BC |
2480 | ATH5K_DBG(sc, ATH5K_DEBUG_RESET, "invalid %u\n", |
2481 | test_bit(ATH_STAT_INVALID, sc->status)); | |
2482 | ||
2483 | /* | |
2484 | * Shutdown the hardware and driver: | |
2485 | * stop output from above | |
2486 | * disable interrupts | |
2487 | * turn off timers | |
2488 | * turn off the radio | |
2489 | * clear transmit machinery | |
2490 | * clear receive machinery | |
2491 | * drain and release tx queues | |
2492 | * reclaim beacon resources | |
2493 | * power down hardware | |
2494 | * | |
2495 | * Note that some of this work is not possible if the | |
2496 | * hardware is gone (invalid). | |
2497 | */ | |
2498 | ieee80211_stop_queues(sc->hw); | |
2499 | ||
2500 | if (!test_bit(ATH_STAT_INVALID, sc->status)) { | |
2501 | ath5k_led_off(sc); | |
2502 | ath5k_hw_set_imr(ah, 0); | |
aeae4ac9 | 2503 | synchronize_irq(sc->irq); |
8a63facc | 2504 | ath5k_rx_stop(sc); |
80dac9ee NK |
2505 | ath5k_hw_dma_stop(ah); |
2506 | ath5k_drain_tx_buffs(sc); | |
8a63facc BC |
2507 | ath5k_hw_phy_disable(ah); |
2508 | } | |
2509 | ||
2510 | return 0; | |
cec8db23 BC |
2511 | } |
2512 | ||
cd2c5486 | 2513 | int |
132b1c3e | 2514 | ath5k_init_hw(struct ath5k_softc *sc) |
fa1c114f | 2515 | { |
8a63facc BC |
2516 | struct ath5k_hw *ah = sc->ah; |
2517 | struct ath_common *common = ath5k_hw_common(ah); | |
2518 | int ret, i; | |
fa1c114f | 2519 | |
8a63facc BC |
2520 | mutex_lock(&sc->lock); |
2521 | ||
2522 | ATH5K_DBG(sc, ATH5K_DEBUG_RESET, "mode %d\n", sc->opmode); | |
fa1c114f | 2523 | |
fa1c114f | 2524 | /* |
8a63facc BC |
2525 | * Stop anything previously setup. This is safe |
2526 | * no matter this is the first time through or not. | |
fa1c114f | 2527 | */ |
8a63facc | 2528 | ath5k_stop_locked(sc); |
fa1c114f | 2529 | |
8a63facc BC |
2530 | /* |
2531 | * The basic interface to setting the hardware in a good | |
2532 | * state is ``reset''. On return the hardware is known to | |
2533 | * be powered up and with interrupts disabled. This must | |
2534 | * be followed by initialization of the appropriate bits | |
2535 | * and then setup of the interrupt mask. | |
2536 | */ | |
2537 | sc->curchan = sc->hw->conf.channel; | |
8a63facc BC |
2538 | sc->imask = AR5K_INT_RXOK | AR5K_INT_RXERR | AR5K_INT_RXEOL | |
2539 | AR5K_INT_RXORN | AR5K_INT_TXDESC | AR5K_INT_TXEOL | | |
2540 | AR5K_INT_FATAL | AR5K_INT_GLOBAL | AR5K_INT_MIB; | |
fa1c114f | 2541 | |
8aec7af9 | 2542 | ret = ath5k_reset(sc, NULL, false); |
8a63facc BC |
2543 | if (ret) |
2544 | goto done; | |
fa1c114f | 2545 | |
8a63facc BC |
2546 | ath5k_rfkill_hw_start(ah); |
2547 | ||
2548 | /* | |
2549 | * Reset the key cache since some parts do not reset the | |
2550 | * contents on initial power up or resume from suspend. | |
2551 | */ | |
2552 | for (i = 0; i < common->keymax; i++) | |
2553 | ath_hw_keyreset(common, (u16) i); | |
2554 | ||
61cde037 NK |
2555 | /* Use higher rates for acks instead of base |
2556 | * rate */ | |
2557 | ah->ah_ack_bitrate_high = true; | |
b1ae1edf BG |
2558 | |
2559 | for (i = 0; i < ARRAY_SIZE(sc->bslot); i++) | |
2560 | sc->bslot[i] = NULL; | |
2561 | ||
8a63facc BC |
2562 | ret = 0; |
2563 | done: | |
2564 | mmiowb(); | |
2565 | mutex_unlock(&sc->lock); | |
4edd761f BR |
2566 | |
2567 | ieee80211_queue_delayed_work(sc->hw, &sc->tx_complete_work, | |
2568 | msecs_to_jiffies(ATH5K_TX_COMPLETE_POLL_INT)); | |
2569 | ||
8a63facc BC |
2570 | return ret; |
2571 | } | |
2572 | ||
2573 | static void stop_tasklets(struct ath5k_softc *sc) | |
2574 | { | |
2575 | tasklet_kill(&sc->rxtq); | |
2576 | tasklet_kill(&sc->txtq); | |
2577 | tasklet_kill(&sc->calib); | |
2578 | tasklet_kill(&sc->beacontq); | |
2579 | tasklet_kill(&sc->ani_tasklet); | |
2580 | } | |
2581 | ||
2582 | /* | |
2583 | * Stop the device, grabbing the top-level lock to protect | |
2584 | * against concurrent entry through ath5k_init (which can happen | |
2585 | * if another thread does a system call and the thread doing the | |
2586 | * stop is preempted). | |
2587 | */ | |
cd2c5486 | 2588 | int |
8a63facc BC |
2589 | ath5k_stop_hw(struct ath5k_softc *sc) |
2590 | { | |
2591 | int ret; | |
2592 | ||
2593 | mutex_lock(&sc->lock); | |
2594 | ret = ath5k_stop_locked(sc); | |
2595 | if (ret == 0 && !test_bit(ATH_STAT_INVALID, sc->status)) { | |
2596 | /* | |
2597 | * Don't set the card in full sleep mode! | |
2598 | * | |
2599 | * a) When the device is in this state it must be carefully | |
2600 | * woken up or references to registers in the PCI clock | |
2601 | * domain may freeze the bus (and system). This varies | |
2602 | * by chip and is mostly an issue with newer parts | |
2603 | * (madwifi sources mentioned srev >= 0x78) that go to | |
2604 | * sleep more quickly. | |
2605 | * | |
2606 | * b) On older chips full sleep results a weird behaviour | |
2607 | * during wakeup. I tested various cards with srev < 0x78 | |
2608 | * and they don't wake up after module reload, a second | |
2609 | * module reload is needed to bring the card up again. | |
2610 | * | |
2611 | * Until we figure out what's going on don't enable | |
2612 | * full chip reset on any chip (this is what Legacy HAL | |
2613 | * and Sam's HAL do anyway). Instead Perform a full reset | |
2614 | * on the device (same as initial state after attach) and | |
2615 | * leave it idle (keep MAC/BB on warm reset) */ | |
2616 | ret = ath5k_hw_on_hold(sc->ah); | |
2617 | ||
2618 | ATH5K_DBG(sc, ATH5K_DEBUG_RESET, | |
2619 | "putting device to sleep\n"); | |
fa1c114f JS |
2620 | } |
2621 | ||
8a63facc BC |
2622 | mmiowb(); |
2623 | mutex_unlock(&sc->lock); | |
2624 | ||
2625 | stop_tasklets(sc); | |
2626 | ||
4edd761f BR |
2627 | cancel_delayed_work_sync(&sc->tx_complete_work); |
2628 | ||
8a63facc BC |
2629 | ath5k_rfkill_hw_stop(sc->ah); |
2630 | ||
2631 | return ret; | |
fa1c114f JS |
2632 | } |
2633 | ||
209d889b BC |
2634 | /* |
2635 | * Reset the hardware. If chan is not NULL, then also pause rx/tx | |
2636 | * and change to the given channel. | |
5faaff74 BC |
2637 | * |
2638 | * This should be called with sc->lock. | |
209d889b | 2639 | */ |
fa1c114f | 2640 | static int |
8aec7af9 NK |
2641 | ath5k_reset(struct ath5k_softc *sc, struct ieee80211_channel *chan, |
2642 | bool skip_pcu) | |
fa1c114f | 2643 | { |
fa1c114f | 2644 | struct ath5k_hw *ah = sc->ah; |
f15a4bb2 | 2645 | struct ath_common *common = ath5k_hw_common(ah); |
344b54b9 | 2646 | int ret, ani_mode; |
fa1c114f JS |
2647 | |
2648 | ATH5K_DBG(sc, ATH5K_DEBUG_RESET, "resetting\n"); | |
fa1c114f | 2649 | |
450464de | 2650 | ath5k_hw_set_imr(ah, 0); |
aeae4ac9 | 2651 | synchronize_irq(sc->irq); |
450464de BC |
2652 | stop_tasklets(sc); |
2653 | ||
25985edc | 2654 | /* Save ani mode and disable ANI during |
344b54b9 NK |
2655 | * reset. If we don't we might get false |
2656 | * PHY error interrupts. */ | |
2657 | ani_mode = ah->ah_sc->ani_state.ani_mode; | |
2658 | ath5k_ani_init(ah, ATH5K_ANI_MODE_OFF); | |
2659 | ||
19252ecb NK |
2660 | /* We are going to empty hw queues |
2661 | * so we should also free any remaining | |
2662 | * tx buffers */ | |
2663 | ath5k_drain_tx_buffs(sc); | |
930a7622 | 2664 | if (chan) |
209d889b | 2665 | sc->curchan = chan; |
8aec7af9 NK |
2666 | ret = ath5k_hw_reset(ah, sc->opmode, sc->curchan, chan != NULL, |
2667 | skip_pcu); | |
d7dc1003 | 2668 | if (ret) { |
fa1c114f JS |
2669 | ATH5K_ERR(sc, "can't reset hardware (%d)\n", ret); |
2670 | goto err; | |
2671 | } | |
d7dc1003 | 2672 | |
fa1c114f | 2673 | ret = ath5k_rx_start(sc); |
d7dc1003 | 2674 | if (ret) { |
fa1c114f JS |
2675 | ATH5K_ERR(sc, "can't start recv logic\n"); |
2676 | goto err; | |
2677 | } | |
d7dc1003 | 2678 | |
344b54b9 | 2679 | ath5k_ani_init(ah, ani_mode); |
2111ac0d | 2680 | |
ac559526 BR |
2681 | ah->ah_cal_next_full = jiffies; |
2682 | ah->ah_cal_next_ani = jiffies; | |
afe86286 | 2683 | ah->ah_cal_next_nf = jiffies; |
5dcc03fe | 2684 | ewma_init(&ah->ah_beacon_rssi_avg, 1024, 8); |
afe86286 | 2685 | |
f15a4bb2 BR |
2686 | /* clear survey data and cycle counters */ |
2687 | memset(&sc->survey, 0, sizeof(sc->survey)); | |
bb007554 | 2688 | spin_lock_bh(&common->cc_lock); |
f15a4bb2 BR |
2689 | ath_hw_cycle_counters_update(common); |
2690 | memset(&common->cc_survey, 0, sizeof(common->cc_survey)); | |
2691 | memset(&common->cc_ani, 0, sizeof(common->cc_ani)); | |
bb007554 | 2692 | spin_unlock_bh(&common->cc_lock); |
f15a4bb2 | 2693 | |
fa1c114f | 2694 | /* |
d7dc1003 JS |
2695 | * Change channels and update the h/w rate map if we're switching; |
2696 | * e.g. 11a to 11b/g. | |
2697 | * | |
2698 | * We may be doing a reset in response to an ioctl that changes the | |
2699 | * channel so update any state that might change as a result. | |
fa1c114f JS |
2700 | * |
2701 | * XXX needed? | |
2702 | */ | |
2703 | /* ath5k_chan_change(sc, c); */ | |
fa1c114f | 2704 | |
d7dc1003 JS |
2705 | ath5k_beacon_config(sc); |
2706 | /* intrs are enabled by ath5k_beacon_config */ | |
fa1c114f | 2707 | |
397f385b BR |
2708 | ieee80211_wake_queues(sc->hw); |
2709 | ||
fa1c114f JS |
2710 | return 0; |
2711 | err: | |
2712 | return ret; | |
2713 | } | |
2714 | ||
5faaff74 BC |
2715 | static void ath5k_reset_work(struct work_struct *work) |
2716 | { | |
2717 | struct ath5k_softc *sc = container_of(work, struct ath5k_softc, | |
2718 | reset_work); | |
2719 | ||
2720 | mutex_lock(&sc->lock); | |
8aec7af9 | 2721 | ath5k_reset(sc, NULL, true); |
5faaff74 BC |
2722 | mutex_unlock(&sc->lock); |
2723 | } | |
2724 | ||
8a63facc | 2725 | static int |
132b1c3e | 2726 | ath5k_init(struct ieee80211_hw *hw) |
fa1c114f | 2727 | { |
132b1c3e | 2728 | |
fa1c114f | 2729 | struct ath5k_softc *sc = hw->priv; |
8a63facc BC |
2730 | struct ath5k_hw *ah = sc->ah; |
2731 | struct ath_regulatory *regulatory = ath5k_hw_regulatory(ah); | |
925e0b06 | 2732 | struct ath5k_txq *txq; |
8a63facc | 2733 | u8 mac[ETH_ALEN] = {}; |
fa1c114f JS |
2734 | int ret; |
2735 | ||
fa1c114f | 2736 | |
8a63facc BC |
2737 | /* |
2738 | * Check if the MAC has multi-rate retry support. | |
2739 | * We do this by trying to setup a fake extended | |
2740 | * descriptor. MACs that don't have support will | |
2741 | * return false w/o doing anything. MACs that do | |
2742 | * support it will return true w/o doing anything. | |
2743 | */ | |
2744 | ret = ath5k_hw_setup_mrr_tx_desc(ah, NULL, 0, 0, 0, 0, 0, 0); | |
67d2e2df | 2745 | |
8a63facc BC |
2746 | if (ret < 0) |
2747 | goto err; | |
2748 | if (ret > 0) | |
2749 | __set_bit(ATH_STAT_MRRETRY, sc->status); | |
ccfe5552 | 2750 | |
8a63facc BC |
2751 | /* |
2752 | * Collect the channel list. The 802.11 layer | |
2753 | * is resposible for filtering this list based | |
2754 | * on settings like the phy mode and regulatory | |
2755 | * domain restrictions. | |
2756 | */ | |
2757 | ret = ath5k_setup_bands(hw); | |
2758 | if (ret) { | |
2759 | ATH5K_ERR(sc, "can't get channels\n"); | |
2760 | goto err; | |
2761 | } | |
67d2e2df | 2762 | |
8a63facc BC |
2763 | /* |
2764 | * Allocate tx+rx descriptors and populate the lists. | |
2765 | */ | |
aeae4ac9 | 2766 | ret = ath5k_desc_alloc(sc); |
8a63facc BC |
2767 | if (ret) { |
2768 | ATH5K_ERR(sc, "can't allocate descriptors\n"); | |
2769 | goto err; | |
2770 | } | |
fa1c114f | 2771 | |
8a63facc BC |
2772 | /* |
2773 | * Allocate hardware transmit queues: one queue for | |
2774 | * beacon frames and one data queue for each QoS | |
2775 | * priority. Note that hw functions handle resetting | |
2776 | * these queues at the needed time. | |
2777 | */ | |
2778 | ret = ath5k_beaconq_setup(ah); | |
2779 | if (ret < 0) { | |
2780 | ATH5K_ERR(sc, "can't setup a beacon xmit queue\n"); | |
2781 | goto err_desc; | |
2782 | } | |
2783 | sc->bhalq = ret; | |
2784 | sc->cabq = ath5k_txq_setup(sc, AR5K_TX_QUEUE_CAB, 0); | |
2785 | if (IS_ERR(sc->cabq)) { | |
2786 | ATH5K_ERR(sc, "can't setup cab queue\n"); | |
2787 | ret = PTR_ERR(sc->cabq); | |
2788 | goto err_bhal; | |
2789 | } | |
fa1c114f | 2790 | |
22d8d9f8 BR |
2791 | /* 5211 and 5212 usually support 10 queues but we better rely on the |
2792 | * capability information */ | |
2793 | if (ah->ah_capabilities.cap_queues.q_tx_num >= 6) { | |
2794 | /* This order matches mac80211's queue priority, so we can | |
2795 | * directly use the mac80211 queue number without any mapping */ | |
2796 | txq = ath5k_txq_setup(sc, AR5K_TX_QUEUE_DATA, AR5K_WME_AC_VO); | |
2797 | if (IS_ERR(txq)) { | |
2798 | ATH5K_ERR(sc, "can't setup xmit queue\n"); | |
2799 | ret = PTR_ERR(txq); | |
2800 | goto err_queues; | |
2801 | } | |
2802 | txq = ath5k_txq_setup(sc, AR5K_TX_QUEUE_DATA, AR5K_WME_AC_VI); | |
2803 | if (IS_ERR(txq)) { | |
2804 | ATH5K_ERR(sc, "can't setup xmit queue\n"); | |
2805 | ret = PTR_ERR(txq); | |
2806 | goto err_queues; | |
2807 | } | |
2808 | txq = ath5k_txq_setup(sc, AR5K_TX_QUEUE_DATA, AR5K_WME_AC_BE); | |
2809 | if (IS_ERR(txq)) { | |
2810 | ATH5K_ERR(sc, "can't setup xmit queue\n"); | |
2811 | ret = PTR_ERR(txq); | |
2812 | goto err_queues; | |
2813 | } | |
2814 | txq = ath5k_txq_setup(sc, AR5K_TX_QUEUE_DATA, AR5K_WME_AC_BK); | |
2815 | if (IS_ERR(txq)) { | |
2816 | ATH5K_ERR(sc, "can't setup xmit queue\n"); | |
2817 | ret = PTR_ERR(txq); | |
2818 | goto err_queues; | |
2819 | } | |
2820 | hw->queues = 4; | |
2821 | } else { | |
2822 | /* older hardware (5210) can only support one data queue */ | |
2823 | txq = ath5k_txq_setup(sc, AR5K_TX_QUEUE_DATA, AR5K_WME_AC_BE); | |
2824 | if (IS_ERR(txq)) { | |
2825 | ATH5K_ERR(sc, "can't setup xmit queue\n"); | |
2826 | ret = PTR_ERR(txq); | |
2827 | goto err_queues; | |
2828 | } | |
2829 | hw->queues = 1; | |
2830 | } | |
fa1c114f | 2831 | |
8a63facc BC |
2832 | tasklet_init(&sc->rxtq, ath5k_tasklet_rx, (unsigned long)sc); |
2833 | tasklet_init(&sc->txtq, ath5k_tasklet_tx, (unsigned long)sc); | |
2834 | tasklet_init(&sc->calib, ath5k_tasklet_calibrate, (unsigned long)sc); | |
2835 | tasklet_init(&sc->beacontq, ath5k_tasklet_beacon, (unsigned long)sc); | |
2836 | tasklet_init(&sc->ani_tasklet, ath5k_tasklet_ani, (unsigned long)sc); | |
be009370 | 2837 | |
8a63facc | 2838 | INIT_WORK(&sc->reset_work, ath5k_reset_work); |
4edd761f | 2839 | INIT_DELAYED_WORK(&sc->tx_complete_work, ath5k_tx_complete_poll_work); |
fa1c114f | 2840 | |
8a63facc BC |
2841 | ret = ath5k_eeprom_read_mac(ah, mac); |
2842 | if (ret) { | |
aeae4ac9 | 2843 | ATH5K_ERR(sc, "unable to read address from EEPROM\n"); |
8a63facc | 2844 | goto err_queues; |
e30eb4ab | 2845 | } |
2bed03eb | 2846 | |
8a63facc | 2847 | SET_IEEE80211_PERM_ADDR(hw, mac); |
b1ae1edf | 2848 | memcpy(&sc->lladdr, mac, ETH_ALEN); |
8a63facc | 2849 | /* All MAC address bits matter for ACKs */ |
62c58fb4 | 2850 | ath5k_update_bssid_mask_and_opmode(sc, NULL); |
8a63facc BC |
2851 | |
2852 | regulatory->current_rd = ah->ah_capabilities.cap_eeprom.ee_regdomain; | |
2853 | ret = ath_regd_init(regulatory, hw->wiphy, ath5k_reg_notifier); | |
2854 | if (ret) { | |
2855 | ATH5K_ERR(sc, "can't initialize regulatory system\n"); | |
2856 | goto err_queues; | |
2857 | } | |
2858 | ||
2859 | ret = ieee80211_register_hw(hw); | |
2860 | if (ret) { | |
2861 | ATH5K_ERR(sc, "can't register ieee80211 hw\n"); | |
2862 | goto err_queues; | |
2863 | } | |
2864 | ||
2865 | if (!ath_is_world_regd(regulatory)) | |
2866 | regulatory_hint(hw->wiphy, regulatory->alpha2); | |
2867 | ||
2868 | ath5k_init_leds(sc); | |
2869 | ||
2870 | ath5k_sysfs_register(sc); | |
2871 | ||
2872 | return 0; | |
2873 | err_queues: | |
2874 | ath5k_txq_release(sc); | |
2875 | err_bhal: | |
2876 | ath5k_hw_release_tx_queue(ah, sc->bhalq); | |
2877 | err_desc: | |
aeae4ac9 | 2878 | ath5k_desc_free(sc); |
8a63facc BC |
2879 | err: |
2880 | return ret; | |
2881 | } | |
2882 | ||
132b1c3e FF |
2883 | void |
2884 | ath5k_deinit_softc(struct ath5k_softc *sc) | |
8a63facc | 2885 | { |
132b1c3e | 2886 | struct ieee80211_hw *hw = sc->hw; |
8a63facc BC |
2887 | |
2888 | /* | |
2889 | * NB: the order of these is important: | |
2890 | * o call the 802.11 layer before detaching ath5k_hw to | |
2891 | * ensure callbacks into the driver to delete global | |
2892 | * key cache entries can be handled | |
2893 | * o reclaim the tx queue data structures after calling | |
2894 | * the 802.11 layer as we'll get called back to reclaim | |
2895 | * node state and potentially want to use them | |
2896 | * o to cleanup the tx queues the hal is called, so detach | |
2897 | * it last | |
2898 | * XXX: ??? detach ath5k_hw ??? | |
2899 | * Other than that, it's straightforward... | |
2900 | */ | |
132b1c3e | 2901 | ath5k_debug_finish_device(sc); |
8a63facc | 2902 | ieee80211_unregister_hw(hw); |
aeae4ac9 | 2903 | ath5k_desc_free(sc); |
8a63facc BC |
2904 | ath5k_txq_release(sc); |
2905 | ath5k_hw_release_tx_queue(sc->ah, sc->bhalq); | |
2906 | ath5k_unregister_leds(sc); | |
2907 | ||
2908 | ath5k_sysfs_unregister(sc); | |
2909 | /* | |
2910 | * NB: can't reclaim these until after ieee80211_ifdetach | |
2911 | * returns because we'll get called back to reclaim node | |
2912 | * state and potentially want to use them. | |
2913 | */ | |
132b1c3e FF |
2914 | ath5k_hw_deinit(sc->ah); |
2915 | free_irq(sc->irq, sc); | |
8a63facc BC |
2916 | } |
2917 | ||
cd2c5486 BR |
2918 | bool |
2919 | ath_any_vif_assoc(struct ath5k_softc *sc) | |
b1ae1edf | 2920 | { |
e4b0b32a | 2921 | struct ath5k_vif_iter_data iter_data; |
b1ae1edf BG |
2922 | iter_data.hw_macaddr = NULL; |
2923 | iter_data.any_assoc = false; | |
2924 | iter_data.need_set_hw_addr = false; | |
2925 | iter_data.found_active = true; | |
2926 | ||
e4b0b32a | 2927 | ieee80211_iterate_active_interfaces_atomic(sc->hw, ath5k_vif_iter, |
b1ae1edf BG |
2928 | &iter_data); |
2929 | return iter_data.any_assoc; | |
2930 | } | |
2931 | ||
cd2c5486 | 2932 | void |
8a63facc BC |
2933 | set_beacon_filter(struct ieee80211_hw *hw, bool enable) |
2934 | { | |
2935 | struct ath5k_softc *sc = hw->priv; | |
2936 | struct ath5k_hw *ah = sc->ah; | |
2937 | u32 rfilt; | |
2938 | rfilt = ath5k_hw_get_rx_filter(ah); | |
2939 | if (enable) | |
2940 | rfilt |= AR5K_RX_FILTER_BEACON; | |
2941 | else | |
2942 | rfilt &= ~AR5K_RX_FILTER_BEACON; | |
2943 | ath5k_hw_set_rx_filter(ah, rfilt); | |
2944 | sc->filter_flags = rfilt; | |
2945 | } |