Commit | Line | Data |
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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 | |
9ad9a26e | 64 | static int modparam_nohwcrypt; |
46802a4f | 65 | module_param_named(nohwcrypt, modparam_nohwcrypt, bool, S_IRUGO); |
9ad9a26e | 66 | MODULE_PARM_DESC(nohwcrypt, "Disable hardware encryption."); |
fa1c114f | 67 | |
42639fcd | 68 | static int modparam_all_channels; |
46802a4f | 69 | module_param_named(all_channels, modparam_all_channels, bool, S_IRUGO); |
42639fcd BC |
70 | MODULE_PARM_DESC(all_channels, "Expose all channels the device can use."); |
71 | ||
fa1c114f JS |
72 | /* Module info */ |
73 | MODULE_AUTHOR("Jiri Slaby"); | |
74 | MODULE_AUTHOR("Nick Kossifidis"); | |
75 | MODULE_DESCRIPTION("Support for 5xxx series of Atheros 802.11 wireless LAN cards."); | |
76 | MODULE_SUPPORTED_DEVICE("Atheros 5xxx WLAN cards"); | |
77 | MODULE_LICENSE("Dual BSD/GPL"); | |
fa1c114f | 78 | |
132b1c3e | 79 | static int ath5k_init(struct ieee80211_hw *hw); |
8aec7af9 NK |
80 | static int ath5k_reset(struct ath5k_softc *sc, struct ieee80211_channel *chan, |
81 | bool skip_pcu); | |
8a63facc BC |
82 | static int ath5k_beacon_update(struct ieee80211_hw *hw, |
83 | struct ieee80211_vif *vif); | |
84 | static void ath5k_beacon_update_timers(struct ath5k_softc *sc, u64 bc_tsf); | |
fa1c114f | 85 | |
fa1c114f | 86 | /* Known SREVs */ |
2c91108c | 87 | static const struct ath5k_srev_name srev_names[] = { |
a0b907ee FF |
88 | #ifdef CONFIG_ATHEROS_AR231X |
89 | { "5312", AR5K_VERSION_MAC, AR5K_SREV_AR5312_R2 }, | |
90 | { "5312", AR5K_VERSION_MAC, AR5K_SREV_AR5312_R7 }, | |
91 | { "2313", AR5K_VERSION_MAC, AR5K_SREV_AR2313_R8 }, | |
92 | { "2315", AR5K_VERSION_MAC, AR5K_SREV_AR2315_R6 }, | |
93 | { "2315", AR5K_VERSION_MAC, AR5K_SREV_AR2315_R7 }, | |
94 | { "2317", AR5K_VERSION_MAC, AR5K_SREV_AR2317_R1 }, | |
95 | { "2317", AR5K_VERSION_MAC, AR5K_SREV_AR2317_R2 }, | |
96 | #else | |
1bef016a NK |
97 | { "5210", AR5K_VERSION_MAC, AR5K_SREV_AR5210 }, |
98 | { "5311", AR5K_VERSION_MAC, AR5K_SREV_AR5311 }, | |
99 | { "5311A", AR5K_VERSION_MAC, AR5K_SREV_AR5311A }, | |
100 | { "5311B", AR5K_VERSION_MAC, AR5K_SREV_AR5311B }, | |
101 | { "5211", AR5K_VERSION_MAC, AR5K_SREV_AR5211 }, | |
102 | { "5212", AR5K_VERSION_MAC, AR5K_SREV_AR5212 }, | |
103 | { "5213", AR5K_VERSION_MAC, AR5K_SREV_AR5213 }, | |
104 | { "5213A", AR5K_VERSION_MAC, AR5K_SREV_AR5213A }, | |
105 | { "2413", AR5K_VERSION_MAC, AR5K_SREV_AR2413 }, | |
106 | { "2414", AR5K_VERSION_MAC, AR5K_SREV_AR2414 }, | |
107 | { "5424", AR5K_VERSION_MAC, AR5K_SREV_AR5424 }, | |
108 | { "5413", AR5K_VERSION_MAC, AR5K_SREV_AR5413 }, | |
109 | { "5414", AR5K_VERSION_MAC, AR5K_SREV_AR5414 }, | |
110 | { "2415", AR5K_VERSION_MAC, AR5K_SREV_AR2415 }, | |
111 | { "5416", AR5K_VERSION_MAC, AR5K_SREV_AR5416 }, | |
112 | { "5418", AR5K_VERSION_MAC, AR5K_SREV_AR5418 }, | |
113 | { "2425", AR5K_VERSION_MAC, AR5K_SREV_AR2425 }, | |
114 | { "2417", AR5K_VERSION_MAC, AR5K_SREV_AR2417 }, | |
a0b907ee | 115 | #endif |
1bef016a | 116 | { "xxxxx", AR5K_VERSION_MAC, AR5K_SREV_UNKNOWN }, |
fa1c114f JS |
117 | { "5110", AR5K_VERSION_RAD, AR5K_SREV_RAD_5110 }, |
118 | { "5111", AR5K_VERSION_RAD, AR5K_SREV_RAD_5111 }, | |
1bef016a | 119 | { "5111A", AR5K_VERSION_RAD, AR5K_SREV_RAD_5111A }, |
fa1c114f JS |
120 | { "2111", AR5K_VERSION_RAD, AR5K_SREV_RAD_2111 }, |
121 | { "5112", AR5K_VERSION_RAD, AR5K_SREV_RAD_5112 }, | |
122 | { "5112A", AR5K_VERSION_RAD, AR5K_SREV_RAD_5112A }, | |
1bef016a | 123 | { "5112B", AR5K_VERSION_RAD, AR5K_SREV_RAD_5112B }, |
fa1c114f JS |
124 | { "2112", AR5K_VERSION_RAD, AR5K_SREV_RAD_2112 }, |
125 | { "2112A", AR5K_VERSION_RAD, AR5K_SREV_RAD_2112A }, | |
1bef016a NK |
126 | { "2112B", AR5K_VERSION_RAD, AR5K_SREV_RAD_2112B }, |
127 | { "2413", AR5K_VERSION_RAD, AR5K_SREV_RAD_2413 }, | |
128 | { "5413", AR5K_VERSION_RAD, AR5K_SREV_RAD_5413 }, | |
1bef016a | 129 | { "5424", AR5K_VERSION_RAD, AR5K_SREV_RAD_5424 }, |
fa1c114f | 130 | { "5133", AR5K_VERSION_RAD, AR5K_SREV_RAD_5133 }, |
a0b907ee FF |
131 | #ifdef CONFIG_ATHEROS_AR231X |
132 | { "2316", AR5K_VERSION_RAD, AR5K_SREV_RAD_2316 }, | |
133 | { "2317", AR5K_VERSION_RAD, AR5K_SREV_RAD_2317 }, | |
134 | #endif | |
fa1c114f JS |
135 | { "xxxxx", AR5K_VERSION_RAD, AR5K_SREV_UNKNOWN }, |
136 | }; | |
137 | ||
2c91108c | 138 | static const struct ieee80211_rate ath5k_rates[] = { |
63266a65 BR |
139 | { .bitrate = 10, |
140 | .hw_value = ATH5K_RATE_CODE_1M, }, | |
141 | { .bitrate = 20, | |
142 | .hw_value = ATH5K_RATE_CODE_2M, | |
143 | .hw_value_short = ATH5K_RATE_CODE_2M | AR5K_SET_SHORT_PREAMBLE, | |
144 | .flags = IEEE80211_RATE_SHORT_PREAMBLE }, | |
145 | { .bitrate = 55, | |
146 | .hw_value = ATH5K_RATE_CODE_5_5M, | |
147 | .hw_value_short = ATH5K_RATE_CODE_5_5M | AR5K_SET_SHORT_PREAMBLE, | |
148 | .flags = IEEE80211_RATE_SHORT_PREAMBLE }, | |
149 | { .bitrate = 110, | |
150 | .hw_value = ATH5K_RATE_CODE_11M, | |
151 | .hw_value_short = ATH5K_RATE_CODE_11M | AR5K_SET_SHORT_PREAMBLE, | |
152 | .flags = IEEE80211_RATE_SHORT_PREAMBLE }, | |
153 | { .bitrate = 60, | |
154 | .hw_value = ATH5K_RATE_CODE_6M, | |
155 | .flags = 0 }, | |
156 | { .bitrate = 90, | |
157 | .hw_value = ATH5K_RATE_CODE_9M, | |
158 | .flags = 0 }, | |
159 | { .bitrate = 120, | |
160 | .hw_value = ATH5K_RATE_CODE_12M, | |
161 | .flags = 0 }, | |
162 | { .bitrate = 180, | |
163 | .hw_value = ATH5K_RATE_CODE_18M, | |
164 | .flags = 0 }, | |
165 | { .bitrate = 240, | |
166 | .hw_value = ATH5K_RATE_CODE_24M, | |
167 | .flags = 0 }, | |
168 | { .bitrate = 360, | |
169 | .hw_value = ATH5K_RATE_CODE_36M, | |
170 | .flags = 0 }, | |
171 | { .bitrate = 480, | |
172 | .hw_value = ATH5K_RATE_CODE_48M, | |
173 | .flags = 0 }, | |
174 | { .bitrate = 540, | |
175 | .hw_value = ATH5K_RATE_CODE_54M, | |
176 | .flags = 0 }, | |
177 | /* XR missing */ | |
178 | }; | |
179 | ||
9e4e43f2 | 180 | static inline void ath5k_txbuf_free_skb(struct ath5k_softc *sc, |
fa1c114f JS |
181 | struct ath5k_buf *bf) |
182 | { | |
183 | BUG_ON(!bf); | |
184 | if (!bf->skb) | |
185 | return; | |
aeae4ac9 FF |
186 | dma_unmap_single(sc->dev, bf->skbaddr, bf->skb->len, |
187 | DMA_TO_DEVICE); | |
00482973 | 188 | dev_kfree_skb_any(bf->skb); |
fa1c114f | 189 | bf->skb = NULL; |
39d63f2a BR |
190 | bf->skbaddr = 0; |
191 | bf->desc->ds_data = 0; | |
fa1c114f JS |
192 | } |
193 | ||
9e4e43f2 | 194 | static inline void ath5k_rxbuf_free_skb(struct ath5k_softc *sc, |
a6c8d375 FF |
195 | struct ath5k_buf *bf) |
196 | { | |
cc861f74 LR |
197 | struct ath5k_hw *ah = sc->ah; |
198 | struct ath_common *common = ath5k_hw_common(ah); | |
199 | ||
a6c8d375 FF |
200 | BUG_ON(!bf); |
201 | if (!bf->skb) | |
202 | return; | |
aeae4ac9 FF |
203 | dma_unmap_single(sc->dev, bf->skbaddr, common->rx_bufsize, |
204 | DMA_FROM_DEVICE); | |
a6c8d375 FF |
205 | dev_kfree_skb_any(bf->skb); |
206 | bf->skb = NULL; | |
39d63f2a BR |
207 | bf->skbaddr = 0; |
208 | bf->desc->ds_data = 0; | |
a6c8d375 FF |
209 | } |
210 | ||
211 | ||
fa1c114f JS |
212 | static inline u64 ath5k_extend_tsf(struct ath5k_hw *ah, u32 rstamp) |
213 | { | |
214 | u64 tsf = ath5k_hw_get_tsf64(ah); | |
215 | ||
216 | if ((tsf & 0x7fff) < rstamp) | |
217 | tsf -= 0x8000; | |
218 | ||
219 | return (tsf & ~0x7fff) | rstamp; | |
220 | } | |
221 | ||
e5b046d8 | 222 | const char * |
fa1c114f JS |
223 | ath5k_chip_name(enum ath5k_srev_type type, u_int16_t val) |
224 | { | |
225 | const char *name = "xxxxx"; | |
226 | unsigned int i; | |
227 | ||
228 | for (i = 0; i < ARRAY_SIZE(srev_names); i++) { | |
229 | if (srev_names[i].sr_type != type) | |
230 | continue; | |
75d0edb8 NK |
231 | |
232 | if ((val & 0xf0) == srev_names[i].sr_val) | |
233 | name = srev_names[i].sr_name; | |
234 | ||
235 | if ((val & 0xff) == srev_names[i].sr_val) { | |
fa1c114f JS |
236 | name = srev_names[i].sr_name; |
237 | break; | |
238 | } | |
239 | } | |
240 | ||
241 | return name; | |
242 | } | |
e5aa8474 LR |
243 | static unsigned int ath5k_ioread32(void *hw_priv, u32 reg_offset) |
244 | { | |
245 | struct ath5k_hw *ah = (struct ath5k_hw *) hw_priv; | |
246 | return ath5k_hw_reg_read(ah, reg_offset); | |
247 | } | |
248 | ||
249 | static void ath5k_iowrite32(void *hw_priv, u32 val, u32 reg_offset) | |
250 | { | |
251 | struct ath5k_hw *ah = (struct ath5k_hw *) hw_priv; | |
252 | ath5k_hw_reg_write(ah, val, reg_offset); | |
253 | } | |
254 | ||
255 | static const struct ath_ops ath5k_common_ops = { | |
256 | .read = ath5k_ioread32, | |
257 | .write = ath5k_iowrite32, | |
258 | }; | |
fa1c114f | 259 | |
8a63facc BC |
260 | /***********************\ |
261 | * Driver Initialization * | |
262 | \***********************/ | |
263 | ||
264 | static int ath5k_reg_notifier(struct wiphy *wiphy, struct regulatory_request *request) | |
fa1c114f | 265 | { |
8a63facc BC |
266 | struct ieee80211_hw *hw = wiphy_to_ieee80211_hw(wiphy); |
267 | struct ath5k_softc *sc = hw->priv; | |
268 | struct ath_regulatory *regulatory = ath5k_hw_regulatory(sc->ah); | |
fa1c114f | 269 | |
8a63facc BC |
270 | return ath_reg_notifier_apply(wiphy, request, regulatory); |
271 | } | |
6ccf15a1 | 272 | |
8a63facc BC |
273 | /********************\ |
274 | * Channel/mode setup * | |
275 | \********************/ | |
fa1c114f | 276 | |
8a63facc BC |
277 | /* |
278 | * Convert IEEE channel number to MHz frequency. | |
279 | */ | |
280 | static inline short | |
281 | ath5k_ieee2mhz(short chan) | |
282 | { | |
283 | if (chan <= 14 || chan >= 27) | |
284 | return ieee80211chan2mhz(chan); | |
285 | else | |
286 | return 2212 + chan * 20; | |
287 | } | |
fa1c114f | 288 | |
8a63facc BC |
289 | /* |
290 | * Returns true for the channel numbers used without all_channels modparam. | |
291 | */ | |
292 | static bool ath5k_is_standard_channel(short chan) | |
293 | { | |
294 | return ((chan <= 14) || | |
295 | /* UNII 1,2 */ | |
296 | ((chan & 3) == 0 && chan >= 36 && chan <= 64) || | |
297 | /* midband */ | |
298 | ((chan & 3) == 0 && chan >= 100 && chan <= 140) || | |
299 | /* UNII-3 */ | |
300 | ((chan & 3) == 1 && chan >= 149 && chan <= 165)); | |
301 | } | |
fa1c114f | 302 | |
8a63facc BC |
303 | static unsigned int |
304 | ath5k_copy_channels(struct ath5k_hw *ah, | |
305 | struct ieee80211_channel *channels, | |
306 | unsigned int mode, | |
307 | unsigned int max) | |
308 | { | |
309 | unsigned int i, count, size, chfreq, freq, ch; | |
fa1c114f | 310 | |
8a63facc BC |
311 | if (!test_bit(mode, ah->ah_modes)) |
312 | return 0; | |
fa1c114f | 313 | |
8a63facc BC |
314 | switch (mode) { |
315 | case AR5K_MODE_11A: | |
8a63facc BC |
316 | /* 1..220, but 2GHz frequencies are filtered by check_channel */ |
317 | size = 220 ; | |
318 | chfreq = CHANNEL_5GHZ; | |
319 | break; | |
320 | case AR5K_MODE_11B: | |
321 | case AR5K_MODE_11G: | |
8a63facc BC |
322 | size = 26; |
323 | chfreq = CHANNEL_2GHZ; | |
324 | break; | |
325 | default: | |
326 | ATH5K_WARN(ah->ah_sc, "bad mode, not copying channels\n"); | |
327 | return 0; | |
fa1c114f JS |
328 | } |
329 | ||
8a63facc BC |
330 | for (i = 0, count = 0; i < size && max > 0; i++) { |
331 | ch = i + 1 ; | |
332 | freq = ath5k_ieee2mhz(ch); | |
fa1c114f | 333 | |
8a63facc BC |
334 | /* Check if channel is supported by the chipset */ |
335 | if (!ath5k_channel_ok(ah, freq, chfreq)) | |
336 | continue; | |
f59ac048 | 337 | |
8a63facc BC |
338 | if (!modparam_all_channels && !ath5k_is_standard_channel(ch)) |
339 | continue; | |
f59ac048 | 340 | |
8a63facc BC |
341 | /* Write channel info and increment counter */ |
342 | channels[count].center_freq = freq; | |
343 | channels[count].band = (chfreq == CHANNEL_2GHZ) ? | |
344 | IEEE80211_BAND_2GHZ : IEEE80211_BAND_5GHZ; | |
345 | switch (mode) { | |
346 | case AR5K_MODE_11A: | |
347 | case AR5K_MODE_11G: | |
348 | channels[count].hw_value = chfreq | CHANNEL_OFDM; | |
349 | break; | |
8a63facc BC |
350 | case AR5K_MODE_11B: |
351 | channels[count].hw_value = CHANNEL_B; | |
352 | } | |
fa1c114f | 353 | |
8a63facc BC |
354 | count++; |
355 | max--; | |
356 | } | |
fa1c114f | 357 | |
8a63facc BC |
358 | return count; |
359 | } | |
fa1c114f | 360 | |
8a63facc BC |
361 | static void |
362 | ath5k_setup_rate_idx(struct ath5k_softc *sc, struct ieee80211_supported_band *b) | |
363 | { | |
364 | u8 i; | |
fa1c114f | 365 | |
8a63facc BC |
366 | for (i = 0; i < AR5K_MAX_RATES; i++) |
367 | sc->rate_idx[b->band][i] = -1; | |
fa1c114f | 368 | |
8a63facc BC |
369 | for (i = 0; i < b->n_bitrates; i++) { |
370 | sc->rate_idx[b->band][b->bitrates[i].hw_value] = i; | |
371 | if (b->bitrates[i].hw_value_short) | |
372 | sc->rate_idx[b->band][b->bitrates[i].hw_value_short] = i; | |
fa1c114f | 373 | } |
8a63facc | 374 | } |
fa1c114f | 375 | |
8a63facc BC |
376 | static int |
377 | ath5k_setup_bands(struct ieee80211_hw *hw) | |
378 | { | |
379 | struct ath5k_softc *sc = hw->priv; | |
380 | struct ath5k_hw *ah = sc->ah; | |
381 | struct ieee80211_supported_band *sband; | |
382 | int max_c, count_c = 0; | |
383 | int i; | |
fa1c114f | 384 | |
8a63facc BC |
385 | BUILD_BUG_ON(ARRAY_SIZE(sc->sbands) < IEEE80211_NUM_BANDS); |
386 | max_c = ARRAY_SIZE(sc->channels); | |
db719718 | 387 | |
8a63facc BC |
388 | /* 2GHz band */ |
389 | sband = &sc->sbands[IEEE80211_BAND_2GHZ]; | |
390 | sband->band = IEEE80211_BAND_2GHZ; | |
391 | sband->bitrates = &sc->rates[IEEE80211_BAND_2GHZ][0]; | |
9adca126 | 392 | |
8a63facc BC |
393 | if (test_bit(AR5K_MODE_11G, sc->ah->ah_capabilities.cap_mode)) { |
394 | /* G mode */ | |
395 | memcpy(sband->bitrates, &ath5k_rates[0], | |
396 | sizeof(struct ieee80211_rate) * 12); | |
397 | sband->n_bitrates = 12; | |
2f7fe870 | 398 | |
8a63facc BC |
399 | sband->channels = sc->channels; |
400 | sband->n_channels = ath5k_copy_channels(ah, sband->channels, | |
401 | AR5K_MODE_11G, max_c); | |
fa1c114f | 402 | |
8a63facc BC |
403 | hw->wiphy->bands[IEEE80211_BAND_2GHZ] = sband; |
404 | count_c = sband->n_channels; | |
405 | max_c -= count_c; | |
406 | } else if (test_bit(AR5K_MODE_11B, sc->ah->ah_capabilities.cap_mode)) { | |
407 | /* B mode */ | |
408 | memcpy(sband->bitrates, &ath5k_rates[0], | |
409 | sizeof(struct ieee80211_rate) * 4); | |
410 | sband->n_bitrates = 4; | |
fa1c114f | 411 | |
8a63facc BC |
412 | /* 5211 only supports B rates and uses 4bit rate codes |
413 | * (e.g normally we have 0x1B for 1M, but on 5211 we have 0x0B) | |
414 | * fix them up here: | |
415 | */ | |
416 | if (ah->ah_version == AR5K_AR5211) { | |
417 | for (i = 0; i < 4; i++) { | |
418 | sband->bitrates[i].hw_value = | |
419 | sband->bitrates[i].hw_value & 0xF; | |
420 | sband->bitrates[i].hw_value_short = | |
421 | sband->bitrates[i].hw_value_short & 0xF; | |
fa1c114f JS |
422 | } |
423 | } | |
fa1c114f | 424 | |
8a63facc BC |
425 | sband->channels = sc->channels; |
426 | sband->n_channels = ath5k_copy_channels(ah, sband->channels, | |
427 | AR5K_MODE_11B, max_c); | |
fa1c114f | 428 | |
8a63facc BC |
429 | hw->wiphy->bands[IEEE80211_BAND_2GHZ] = sband; |
430 | count_c = sband->n_channels; | |
431 | max_c -= count_c; | |
432 | } | |
433 | ath5k_setup_rate_idx(sc, sband); | |
fa1c114f | 434 | |
8a63facc BC |
435 | /* 5GHz band, A mode */ |
436 | if (test_bit(AR5K_MODE_11A, sc->ah->ah_capabilities.cap_mode)) { | |
437 | sband = &sc->sbands[IEEE80211_BAND_5GHZ]; | |
438 | sband->band = IEEE80211_BAND_5GHZ; | |
439 | sband->bitrates = &sc->rates[IEEE80211_BAND_5GHZ][0]; | |
fa1c114f | 440 | |
8a63facc BC |
441 | memcpy(sband->bitrates, &ath5k_rates[4], |
442 | sizeof(struct ieee80211_rate) * 8); | |
443 | sband->n_bitrates = 8; | |
fa1c114f | 444 | |
8a63facc BC |
445 | sband->channels = &sc->channels[count_c]; |
446 | sband->n_channels = ath5k_copy_channels(ah, sband->channels, | |
447 | AR5K_MODE_11A, max_c); | |
fa1c114f | 448 | |
8a63facc BC |
449 | hw->wiphy->bands[IEEE80211_BAND_5GHZ] = sband; |
450 | } | |
451 | ath5k_setup_rate_idx(sc, sband); | |
452 | ||
453 | ath5k_debug_dump_bands(sc); | |
fa1c114f | 454 | |
fa1c114f JS |
455 | return 0; |
456 | } | |
457 | ||
8a63facc BC |
458 | /* |
459 | * Set/change channels. We always reset the chip. | |
460 | * To accomplish this we must first cleanup any pending DMA, | |
461 | * then restart stuff after a la ath5k_init. | |
462 | * | |
463 | * Called with sc->lock. | |
464 | */ | |
465 | static int | |
466 | ath5k_chan_set(struct ath5k_softc *sc, struct ieee80211_channel *chan) | |
467 | { | |
468 | ATH5K_DBG(sc, ATH5K_DEBUG_RESET, | |
469 | "channel set, resetting (%u -> %u MHz)\n", | |
470 | sc->curchan->center_freq, chan->center_freq); | |
471 | ||
8451d22d | 472 | /* |
8a63facc BC |
473 | * To switch channels clear any pending DMA operations; |
474 | * wait long enough for the RX fifo to drain, reset the | |
475 | * hardware at the new frequency, and then re-enable | |
476 | * the relevant bits of the h/w. | |
8451d22d | 477 | */ |
8aec7af9 | 478 | return ath5k_reset(sc, chan, true); |
fa1c114f | 479 | } |
fa1c114f | 480 | |
8a63facc BC |
481 | static void |
482 | ath5k_setcurmode(struct ath5k_softc *sc, unsigned int mode) | |
f769c36b | 483 | { |
8a63facc | 484 | sc->curmode = mode; |
f769c36b | 485 | |
8a63facc BC |
486 | if (mode == AR5K_MODE_11A) { |
487 | sc->curband = &sc->sbands[IEEE80211_BAND_5GHZ]; | |
488 | } else { | |
489 | sc->curband = &sc->sbands[IEEE80211_BAND_2GHZ]; | |
490 | } | |
f769c36b BC |
491 | } |
492 | ||
b1ae1edf BG |
493 | struct ath_vif_iter_data { |
494 | const u8 *hw_macaddr; | |
495 | u8 mask[ETH_ALEN]; | |
496 | u8 active_mac[ETH_ALEN]; /* first active MAC */ | |
497 | bool need_set_hw_addr; | |
498 | bool found_active; | |
499 | bool any_assoc; | |
62c58fb4 | 500 | enum nl80211_iftype opmode; |
b1ae1edf BG |
501 | }; |
502 | ||
503 | static void ath_vif_iter(void *data, u8 *mac, struct ieee80211_vif *vif) | |
504 | { | |
505 | struct ath_vif_iter_data *iter_data = data; | |
506 | int i; | |
62c58fb4 | 507 | struct ath5k_vif *avf = (void *)vif->drv_priv; |
b1ae1edf BG |
508 | |
509 | if (iter_data->hw_macaddr) | |
510 | for (i = 0; i < ETH_ALEN; i++) | |
511 | iter_data->mask[i] &= | |
512 | ~(iter_data->hw_macaddr[i] ^ mac[i]); | |
513 | ||
514 | if (!iter_data->found_active) { | |
515 | iter_data->found_active = true; | |
516 | memcpy(iter_data->active_mac, mac, ETH_ALEN); | |
517 | } | |
518 | ||
519 | if (iter_data->need_set_hw_addr && iter_data->hw_macaddr) | |
520 | if (compare_ether_addr(iter_data->hw_macaddr, mac) == 0) | |
521 | iter_data->need_set_hw_addr = false; | |
522 | ||
523 | if (!iter_data->any_assoc) { | |
b1ae1edf BG |
524 | if (avf->assoc) |
525 | iter_data->any_assoc = true; | |
526 | } | |
62c58fb4 BG |
527 | |
528 | /* Calculate combined mode - when APs are active, operate in AP mode. | |
529 | * Otherwise use the mode of the new interface. This can currently | |
530 | * only deal with combinations of APs and STAs. Only one ad-hoc | |
7afbb2f0 | 531 | * interfaces is allowed. |
62c58fb4 BG |
532 | */ |
533 | if (avf->opmode == NL80211_IFTYPE_AP) | |
534 | iter_data->opmode = NL80211_IFTYPE_AP; | |
535 | else | |
536 | if (iter_data->opmode == NL80211_IFTYPE_UNSPECIFIED) | |
537 | iter_data->opmode = avf->opmode; | |
b1ae1edf BG |
538 | } |
539 | ||
14fb7c17 LR |
540 | static void ath5k_update_bssid_mask_and_opmode(struct ath5k_softc *sc, |
541 | struct ieee80211_vif *vif) | |
b1ae1edf BG |
542 | { |
543 | struct ath_common *common = ath5k_hw_common(sc->ah); | |
544 | struct ath_vif_iter_data iter_data; | |
545 | ||
546 | /* | |
547 | * Use the hardware MAC address as reference, the hardware uses it | |
548 | * together with the BSSID mask when matching addresses. | |
549 | */ | |
550 | iter_data.hw_macaddr = common->macaddr; | |
551 | memset(&iter_data.mask, 0xff, ETH_ALEN); | |
552 | iter_data.found_active = false; | |
553 | iter_data.need_set_hw_addr = true; | |
62c58fb4 | 554 | iter_data.opmode = NL80211_IFTYPE_UNSPECIFIED; |
b1ae1edf BG |
555 | |
556 | if (vif) | |
557 | ath_vif_iter(&iter_data, vif->addr, vif); | |
558 | ||
559 | /* Get list of all active MAC addresses */ | |
560 | ieee80211_iterate_active_interfaces_atomic(sc->hw, ath_vif_iter, | |
561 | &iter_data); | |
562 | memcpy(sc->bssidmask, iter_data.mask, ETH_ALEN); | |
563 | ||
62c58fb4 BG |
564 | sc->opmode = iter_data.opmode; |
565 | if (sc->opmode == NL80211_IFTYPE_UNSPECIFIED) | |
566 | /* Nothing active, default to station mode */ | |
567 | sc->opmode = NL80211_IFTYPE_STATION; | |
568 | ||
7afbb2f0 BG |
569 | ath5k_hw_set_opmode(sc->ah, sc->opmode); |
570 | ATH5K_DBG(sc, ATH5K_DEBUG_MODE, "mode setup opmode %d (%s)\n", | |
571 | sc->opmode, ath_opmode_to_string(sc->opmode)); | |
62c58fb4 | 572 | |
b1ae1edf BG |
573 | if (iter_data.need_set_hw_addr && iter_data.found_active) |
574 | ath5k_hw_set_lladdr(sc->ah, iter_data.active_mac); | |
575 | ||
62c58fb4 BG |
576 | if (ath5k_hw_hasbssidmask(sc->ah)) |
577 | ath5k_hw_set_bssid_mask(sc->ah, sc->bssidmask); | |
b1ae1edf BG |
578 | } |
579 | ||
8a63facc | 580 | static void |
b1ae1edf | 581 | ath5k_mode_setup(struct ath5k_softc *sc, struct ieee80211_vif *vif) |
fa1c114f | 582 | { |
fa1c114f | 583 | struct ath5k_hw *ah = sc->ah; |
8a63facc | 584 | u32 rfilt; |
fa1c114f | 585 | |
8a63facc BC |
586 | /* configure rx filter */ |
587 | rfilt = sc->filter_flags; | |
588 | ath5k_hw_set_rx_filter(ah, rfilt); | |
8a63facc | 589 | ATH5K_DBG(sc, ATH5K_DEBUG_MODE, "RX filter 0x%x\n", rfilt); |
62c58fb4 BG |
590 | |
591 | ath5k_update_bssid_mask_and_opmode(sc, vif); | |
8a63facc | 592 | } |
fa1c114f | 593 | |
8a63facc BC |
594 | static inline int |
595 | ath5k_hw_to_driver_rix(struct ath5k_softc *sc, int hw_rix) | |
596 | { | |
597 | int rix; | |
fa1c114f | 598 | |
8a63facc BC |
599 | /* return base rate on errors */ |
600 | if (WARN(hw_rix < 0 || hw_rix >= AR5K_MAX_RATES, | |
601 | "hw_rix out of bounds: %x\n", hw_rix)) | |
602 | return 0; | |
603 | ||
604 | rix = sc->rate_idx[sc->curband->band][hw_rix]; | |
605 | if (WARN(rix < 0, "invalid hw_rix: %x\n", hw_rix)) | |
606 | rix = 0; | |
607 | ||
608 | return rix; | |
609 | } | |
610 | ||
611 | /***************\ | |
612 | * Buffers setup * | |
613 | \***************/ | |
614 | ||
615 | static | |
616 | struct sk_buff *ath5k_rx_skb_alloc(struct ath5k_softc *sc, dma_addr_t *skb_addr) | |
617 | { | |
618 | struct ath_common *common = ath5k_hw_common(sc->ah); | |
619 | struct sk_buff *skb; | |
fa1c114f JS |
620 | |
621 | /* | |
8a63facc BC |
622 | * Allocate buffer with headroom_needed space for the |
623 | * fake physical layer header at the start. | |
fa1c114f | 624 | */ |
8a63facc BC |
625 | skb = ath_rxbuf_alloc(common, |
626 | common->rx_bufsize, | |
627 | GFP_ATOMIC); | |
fa1c114f | 628 | |
8a63facc BC |
629 | if (!skb) { |
630 | ATH5K_ERR(sc, "can't alloc skbuff of size %u\n", | |
631 | common->rx_bufsize); | |
632 | return NULL; | |
fa1c114f JS |
633 | } |
634 | ||
aeae4ac9 | 635 | *skb_addr = dma_map_single(sc->dev, |
8a63facc | 636 | skb->data, common->rx_bufsize, |
aeae4ac9 FF |
637 | DMA_FROM_DEVICE); |
638 | ||
639 | if (unlikely(dma_mapping_error(sc->dev, *skb_addr))) { | |
8a63facc BC |
640 | ATH5K_ERR(sc, "%s: DMA mapping failed\n", __func__); |
641 | dev_kfree_skb(skb); | |
642 | return NULL; | |
0e149cf5 | 643 | } |
8a63facc BC |
644 | return skb; |
645 | } | |
0e149cf5 | 646 | |
8a63facc BC |
647 | static int |
648 | ath5k_rxbuf_setup(struct ath5k_softc *sc, struct ath5k_buf *bf) | |
649 | { | |
650 | struct ath5k_hw *ah = sc->ah; | |
651 | struct sk_buff *skb = bf->skb; | |
652 | struct ath5k_desc *ds; | |
653 | int ret; | |
fa1c114f | 654 | |
8a63facc BC |
655 | if (!skb) { |
656 | skb = ath5k_rx_skb_alloc(sc, &bf->skbaddr); | |
657 | if (!skb) | |
658 | return -ENOMEM; | |
659 | bf->skb = skb; | |
f769c36b BC |
660 | } |
661 | ||
8a63facc BC |
662 | /* |
663 | * Setup descriptors. For receive we always terminate | |
664 | * the descriptor list with a self-linked entry so we'll | |
665 | * not get overrun under high load (as can happen with a | |
666 | * 5212 when ANI processing enables PHY error frames). | |
667 | * | |
668 | * To ensure the last descriptor is self-linked we create | |
669 | * each descriptor as self-linked and add it to the end. As | |
670 | * each additional descriptor is added the previous self-linked | |
671 | * entry is "fixed" naturally. This should be safe even | |
672 | * if DMA is happening. When processing RX interrupts we | |
673 | * never remove/process the last, self-linked, entry on the | |
674 | * descriptor list. This ensures the hardware always has | |
675 | * someplace to write a new frame. | |
676 | */ | |
677 | ds = bf->desc; | |
678 | ds->ds_link = bf->daddr; /* link to self */ | |
679 | ds->ds_data = bf->skbaddr; | |
680 | ret = ath5k_hw_setup_rx_desc(ah, ds, ah->common.rx_bufsize, 0); | |
fa1c114f | 681 | if (ret) { |
8a63facc BC |
682 | ATH5K_ERR(sc, "%s: could not setup RX desc\n", __func__); |
683 | return ret; | |
fa1c114f JS |
684 | } |
685 | ||
8a63facc BC |
686 | if (sc->rxlink != NULL) |
687 | *sc->rxlink = bf->daddr; | |
688 | sc->rxlink = &ds->ds_link; | |
fa1c114f | 689 | return 0; |
fa1c114f JS |
690 | } |
691 | ||
8a63facc | 692 | static enum ath5k_pkt_type get_hw_packet_type(struct sk_buff *skb) |
fa1c114f | 693 | { |
8a63facc BC |
694 | struct ieee80211_hdr *hdr; |
695 | enum ath5k_pkt_type htype; | |
696 | __le16 fc; | |
fa1c114f | 697 | |
8a63facc BC |
698 | hdr = (struct ieee80211_hdr *)skb->data; |
699 | fc = hdr->frame_control; | |
fa1c114f | 700 | |
8a63facc BC |
701 | if (ieee80211_is_beacon(fc)) |
702 | htype = AR5K_PKT_TYPE_BEACON; | |
703 | else if (ieee80211_is_probe_resp(fc)) | |
704 | htype = AR5K_PKT_TYPE_PROBE_RESP; | |
705 | else if (ieee80211_is_atim(fc)) | |
706 | htype = AR5K_PKT_TYPE_ATIM; | |
707 | else if (ieee80211_is_pspoll(fc)) | |
708 | htype = AR5K_PKT_TYPE_PSPOLL; | |
fa1c114f | 709 | else |
8a63facc | 710 | htype = AR5K_PKT_TYPE_NORMAL; |
fa1c114f | 711 | |
8a63facc | 712 | return htype; |
42639fcd BC |
713 | } |
714 | ||
8a63facc BC |
715 | static int |
716 | ath5k_txbuf_setup(struct ath5k_softc *sc, struct ath5k_buf *bf, | |
717 | struct ath5k_txq *txq, int padsize) | |
fa1c114f | 718 | { |
8a63facc BC |
719 | struct ath5k_hw *ah = sc->ah; |
720 | struct ath5k_desc *ds = bf->desc; | |
721 | struct sk_buff *skb = bf->skb; | |
722 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); | |
723 | unsigned int pktlen, flags, keyidx = AR5K_TXKEYIX_INVALID; | |
724 | struct ieee80211_rate *rate; | |
725 | unsigned int mrr_rate[3], mrr_tries[3]; | |
726 | int i, ret; | |
727 | u16 hw_rate; | |
728 | u16 cts_rate = 0; | |
729 | u16 duration = 0; | |
730 | u8 rc_flags; | |
fa1c114f | 731 | |
8a63facc | 732 | flags = AR5K_TXDESC_INTREQ | AR5K_TXDESC_CLRDMASK; |
fa1c114f | 733 | |
8a63facc | 734 | /* XXX endianness */ |
aeae4ac9 FF |
735 | bf->skbaddr = dma_map_single(sc->dev, skb->data, skb->len, |
736 | DMA_TO_DEVICE); | |
fa1c114f | 737 | |
8a63facc | 738 | rate = ieee80211_get_tx_rate(sc->hw, info); |
29ad2fac JL |
739 | if (!rate) { |
740 | ret = -EINVAL; | |
741 | goto err_unmap; | |
742 | } | |
fa1c114f | 743 | |
8a63facc BC |
744 | if (info->flags & IEEE80211_TX_CTL_NO_ACK) |
745 | flags |= AR5K_TXDESC_NOACK; | |
fa1c114f | 746 | |
8a63facc BC |
747 | rc_flags = info->control.rates[0].flags; |
748 | hw_rate = (rc_flags & IEEE80211_TX_RC_USE_SHORT_PREAMBLE) ? | |
749 | rate->hw_value_short : rate->hw_value; | |
42639fcd | 750 | |
8a63facc BC |
751 | pktlen = skb->len; |
752 | ||
753 | /* FIXME: If we are in g mode and rate is a CCK rate | |
754 | * subtract ah->ah_txpower.txp_cck_ofdm_pwr_delta | |
755 | * from tx power (value is in dB units already) */ | |
756 | if (info->control.hw_key) { | |
757 | keyidx = info->control.hw_key->hw_key_idx; | |
758 | pktlen += info->control.hw_key->icv_len; | |
759 | } | |
760 | if (rc_flags & IEEE80211_TX_RC_USE_RTS_CTS) { | |
761 | flags |= AR5K_TXDESC_RTSENA; | |
762 | cts_rate = ieee80211_get_rts_cts_rate(sc->hw, info)->hw_value; | |
763 | duration = le16_to_cpu(ieee80211_rts_duration(sc->hw, | |
b1ae1edf | 764 | info->control.vif, pktlen, info)); |
8a63facc BC |
765 | } |
766 | if (rc_flags & IEEE80211_TX_RC_USE_CTS_PROTECT) { | |
767 | flags |= AR5K_TXDESC_CTSENA; | |
768 | cts_rate = ieee80211_get_rts_cts_rate(sc->hw, info)->hw_value; | |
769 | duration = le16_to_cpu(ieee80211_ctstoself_duration(sc->hw, | |
b1ae1edf | 770 | info->control.vif, pktlen, info)); |
8a63facc BC |
771 | } |
772 | ret = ah->ah_setup_tx_desc(ah, ds, pktlen, | |
773 | ieee80211_get_hdrlen_from_skb(skb), padsize, | |
774 | get_hw_packet_type(skb), | |
775 | (sc->power_level * 2), | |
776 | hw_rate, | |
777 | info->control.rates[0].count, keyidx, ah->ah_tx_ant, flags, | |
778 | cts_rate, duration); | |
779 | if (ret) | |
780 | goto err_unmap; | |
781 | ||
782 | memset(mrr_rate, 0, sizeof(mrr_rate)); | |
783 | memset(mrr_tries, 0, sizeof(mrr_tries)); | |
784 | for (i = 0; i < 3; i++) { | |
785 | rate = ieee80211_get_alt_retry_rate(sc->hw, info, i); | |
786 | if (!rate) | |
400ec45a | 787 | break; |
fa1c114f | 788 | |
8a63facc BC |
789 | mrr_rate[i] = rate->hw_value; |
790 | mrr_tries[i] = info->control.rates[i + 1].count; | |
fa1c114f JS |
791 | } |
792 | ||
8a63facc BC |
793 | ath5k_hw_setup_mrr_tx_desc(ah, ds, |
794 | mrr_rate[0], mrr_tries[0], | |
795 | mrr_rate[1], mrr_tries[1], | |
796 | mrr_rate[2], mrr_tries[2]); | |
fa1c114f | 797 | |
8a63facc BC |
798 | ds->ds_link = 0; |
799 | ds->ds_data = bf->skbaddr; | |
63266a65 | 800 | |
8a63facc BC |
801 | spin_lock_bh(&txq->lock); |
802 | list_add_tail(&bf->list, &txq->q); | |
925e0b06 | 803 | txq->txq_len++; |
8a63facc BC |
804 | if (txq->link == NULL) /* is this first packet? */ |
805 | ath5k_hw_set_txdp(ah, txq->qnum, bf->daddr); | |
806 | else /* no, so only link it */ | |
807 | *txq->link = bf->daddr; | |
63266a65 | 808 | |
8a63facc BC |
809 | txq->link = &ds->ds_link; |
810 | ath5k_hw_start_tx_dma(ah, txq->qnum); | |
811 | mmiowb(); | |
812 | spin_unlock_bh(&txq->lock); | |
813 | ||
814 | return 0; | |
815 | err_unmap: | |
aeae4ac9 | 816 | dma_unmap_single(sc->dev, bf->skbaddr, skb->len, DMA_TO_DEVICE); |
8a63facc | 817 | return ret; |
63266a65 BR |
818 | } |
819 | ||
8a63facc BC |
820 | /*******************\ |
821 | * Descriptors setup * | |
822 | \*******************/ | |
823 | ||
d8ee398d | 824 | static int |
aeae4ac9 | 825 | ath5k_desc_alloc(struct ath5k_softc *sc) |
fa1c114f | 826 | { |
8a63facc BC |
827 | struct ath5k_desc *ds; |
828 | struct ath5k_buf *bf; | |
829 | dma_addr_t da; | |
830 | unsigned int i; | |
831 | int ret; | |
d8ee398d | 832 | |
8a63facc BC |
833 | /* allocate descriptors */ |
834 | sc->desc_len = sizeof(struct ath5k_desc) * | |
835 | (ATH_TXBUF + ATH_RXBUF + ATH_BCBUF + 1); | |
aeae4ac9 FF |
836 | |
837 | sc->desc = dma_alloc_coherent(sc->dev, sc->desc_len, | |
838 | &sc->desc_daddr, GFP_KERNEL); | |
8a63facc BC |
839 | if (sc->desc == NULL) { |
840 | ATH5K_ERR(sc, "can't allocate descriptors\n"); | |
841 | ret = -ENOMEM; | |
842 | goto err; | |
843 | } | |
844 | ds = sc->desc; | |
845 | da = sc->desc_daddr; | |
846 | ATH5K_DBG(sc, ATH5K_DEBUG_ANY, "DMA map: %p (%zu) -> %llx\n", | |
847 | ds, sc->desc_len, (unsigned long long)sc->desc_daddr); | |
fa1c114f | 848 | |
8a63facc BC |
849 | bf = kcalloc(1 + ATH_TXBUF + ATH_RXBUF + ATH_BCBUF, |
850 | sizeof(struct ath5k_buf), GFP_KERNEL); | |
851 | if (bf == NULL) { | |
852 | ATH5K_ERR(sc, "can't allocate bufptr\n"); | |
853 | ret = -ENOMEM; | |
854 | goto err_free; | |
855 | } | |
856 | sc->bufptr = bf; | |
fa1c114f | 857 | |
8a63facc BC |
858 | INIT_LIST_HEAD(&sc->rxbuf); |
859 | for (i = 0; i < ATH_RXBUF; i++, bf++, ds++, da += sizeof(*ds)) { | |
860 | bf->desc = ds; | |
861 | bf->daddr = da; | |
862 | list_add_tail(&bf->list, &sc->rxbuf); | |
863 | } | |
d8ee398d | 864 | |
8a63facc BC |
865 | INIT_LIST_HEAD(&sc->txbuf); |
866 | sc->txbuf_len = ATH_TXBUF; | |
867 | for (i = 0; i < ATH_TXBUF; i++, bf++, ds++, | |
868 | da += sizeof(*ds)) { | |
869 | bf->desc = ds; | |
870 | bf->daddr = da; | |
871 | list_add_tail(&bf->list, &sc->txbuf); | |
fa1c114f JS |
872 | } |
873 | ||
b1ae1edf BG |
874 | /* beacon buffers */ |
875 | INIT_LIST_HEAD(&sc->bcbuf); | |
876 | for (i = 0; i < ATH_BCBUF; i++, bf++, ds++, da += sizeof(*ds)) { | |
877 | bf->desc = ds; | |
878 | bf->daddr = da; | |
879 | list_add_tail(&bf->list, &sc->bcbuf); | |
880 | } | |
fa1c114f | 881 | |
8a63facc BC |
882 | return 0; |
883 | err_free: | |
aeae4ac9 | 884 | dma_free_coherent(sc->dev, sc->desc_len, sc->desc, sc->desc_daddr); |
8a63facc BC |
885 | err: |
886 | sc->desc = NULL; | |
887 | return ret; | |
888 | } | |
fa1c114f | 889 | |
8a63facc | 890 | static void |
aeae4ac9 | 891 | ath5k_desc_free(struct ath5k_softc *sc) |
8a63facc BC |
892 | { |
893 | struct ath5k_buf *bf; | |
d8ee398d | 894 | |
8a63facc BC |
895 | list_for_each_entry(bf, &sc->txbuf, list) |
896 | ath5k_txbuf_free_skb(sc, bf); | |
897 | list_for_each_entry(bf, &sc->rxbuf, list) | |
898 | ath5k_rxbuf_free_skb(sc, bf); | |
b1ae1edf BG |
899 | list_for_each_entry(bf, &sc->bcbuf, list) |
900 | ath5k_txbuf_free_skb(sc, bf); | |
d8ee398d | 901 | |
8a63facc | 902 | /* Free memory associated with all descriptors */ |
aeae4ac9 | 903 | dma_free_coherent(sc->dev, sc->desc_len, sc->desc, sc->desc_daddr); |
8a63facc BC |
904 | sc->desc = NULL; |
905 | sc->desc_daddr = 0; | |
d8ee398d | 906 | |
8a63facc BC |
907 | kfree(sc->bufptr); |
908 | sc->bufptr = NULL; | |
fa1c114f JS |
909 | } |
910 | ||
8a63facc BC |
911 | |
912 | /**************\ | |
913 | * Queues setup * | |
914 | \**************/ | |
915 | ||
916 | static struct ath5k_txq * | |
917 | ath5k_txq_setup(struct ath5k_softc *sc, | |
918 | int qtype, int subtype) | |
fa1c114f | 919 | { |
8a63facc BC |
920 | struct ath5k_hw *ah = sc->ah; |
921 | struct ath5k_txq *txq; | |
922 | struct ath5k_txq_info qi = { | |
923 | .tqi_subtype = subtype, | |
de8af455 BR |
924 | /* XXX: default values not correct for B and XR channels, |
925 | * but who cares? */ | |
926 | .tqi_aifs = AR5K_TUNE_AIFS, | |
927 | .tqi_cw_min = AR5K_TUNE_CWMIN, | |
928 | .tqi_cw_max = AR5K_TUNE_CWMAX | |
8a63facc BC |
929 | }; |
930 | int qnum; | |
d8ee398d | 931 | |
e30eb4ab | 932 | /* |
8a63facc BC |
933 | * Enable interrupts only for EOL and DESC conditions. |
934 | * We mark tx descriptors to receive a DESC interrupt | |
935 | * when a tx queue gets deep; otherwise we wait for the | |
936 | * EOL to reap descriptors. Note that this is done to | |
937 | * reduce interrupt load and this only defers reaping | |
938 | * descriptors, never transmitting frames. Aside from | |
939 | * reducing interrupts this also permits more concurrency. | |
940 | * The only potential downside is if the tx queue backs | |
941 | * up in which case the top half of the kernel may backup | |
942 | * due to a lack of tx descriptors. | |
e30eb4ab | 943 | */ |
8a63facc BC |
944 | qi.tqi_flags = AR5K_TXQ_FLAG_TXEOLINT_ENABLE | |
945 | AR5K_TXQ_FLAG_TXDESCINT_ENABLE; | |
946 | qnum = ath5k_hw_setup_tx_queue(ah, qtype, &qi); | |
947 | if (qnum < 0) { | |
948 | /* | |
949 | * NB: don't print a message, this happens | |
950 | * normally on parts with too few tx queues | |
951 | */ | |
952 | return ERR_PTR(qnum); | |
953 | } | |
954 | if (qnum >= ARRAY_SIZE(sc->txqs)) { | |
955 | ATH5K_ERR(sc, "hw qnum %u out of range, max %tu!\n", | |
956 | qnum, ARRAY_SIZE(sc->txqs)); | |
957 | ath5k_hw_release_tx_queue(ah, qnum); | |
958 | return ERR_PTR(-EINVAL); | |
959 | } | |
960 | txq = &sc->txqs[qnum]; | |
961 | if (!txq->setup) { | |
962 | txq->qnum = qnum; | |
963 | txq->link = NULL; | |
964 | INIT_LIST_HEAD(&txq->q); | |
965 | spin_lock_init(&txq->lock); | |
966 | txq->setup = true; | |
925e0b06 | 967 | txq->txq_len = 0; |
4edd761f | 968 | txq->txq_poll_mark = false; |
923e5b3d | 969 | txq->txq_stuck = 0; |
8a63facc BC |
970 | } |
971 | return &sc->txqs[qnum]; | |
fa1c114f JS |
972 | } |
973 | ||
8a63facc BC |
974 | static int |
975 | ath5k_beaconq_setup(struct ath5k_hw *ah) | |
fa1c114f | 976 | { |
8a63facc | 977 | struct ath5k_txq_info qi = { |
de8af455 BR |
978 | /* XXX: default values not correct for B and XR channels, |
979 | * but who cares? */ | |
980 | .tqi_aifs = AR5K_TUNE_AIFS, | |
981 | .tqi_cw_min = AR5K_TUNE_CWMIN, | |
982 | .tqi_cw_max = AR5K_TUNE_CWMAX, | |
8a63facc BC |
983 | /* NB: for dynamic turbo, don't enable any other interrupts */ |
984 | .tqi_flags = AR5K_TXQ_FLAG_TXDESCINT_ENABLE | |
985 | }; | |
d8ee398d | 986 | |
8a63facc | 987 | return ath5k_hw_setup_tx_queue(ah, AR5K_TX_QUEUE_BEACON, &qi); |
fa1c114f JS |
988 | } |
989 | ||
8a63facc BC |
990 | static int |
991 | ath5k_beaconq_config(struct ath5k_softc *sc) | |
fa1c114f JS |
992 | { |
993 | struct ath5k_hw *ah = sc->ah; | |
8a63facc BC |
994 | struct ath5k_txq_info qi; |
995 | int ret; | |
fa1c114f | 996 | |
8a63facc BC |
997 | ret = ath5k_hw_get_tx_queueprops(ah, sc->bhalq, &qi); |
998 | if (ret) | |
999 | goto err; | |
fa1c114f | 1000 | |
8a63facc BC |
1001 | if (sc->opmode == NL80211_IFTYPE_AP || |
1002 | sc->opmode == NL80211_IFTYPE_MESH_POINT) { | |
1003 | /* | |
1004 | * Always burst out beacon and CAB traffic | |
1005 | * (aifs = cwmin = cwmax = 0) | |
1006 | */ | |
1007 | qi.tqi_aifs = 0; | |
1008 | qi.tqi_cw_min = 0; | |
1009 | qi.tqi_cw_max = 0; | |
1010 | } else if (sc->opmode == NL80211_IFTYPE_ADHOC) { | |
1011 | /* | |
1012 | * Adhoc mode; backoff between 0 and (2 * cw_min). | |
1013 | */ | |
1014 | qi.tqi_aifs = 0; | |
1015 | qi.tqi_cw_min = 0; | |
de8af455 | 1016 | qi.tqi_cw_max = 2 * AR5K_TUNE_CWMIN; |
8a63facc | 1017 | } |
fa1c114f | 1018 | |
8a63facc BC |
1019 | ATH5K_DBG(sc, ATH5K_DEBUG_BEACON, |
1020 | "beacon queueprops tqi_aifs:%d tqi_cw_min:%d tqi_cw_max:%d\n", | |
1021 | qi.tqi_aifs, qi.tqi_cw_min, qi.tqi_cw_max); | |
fa1c114f | 1022 | |
8a63facc BC |
1023 | ret = ath5k_hw_set_tx_queueprops(ah, sc->bhalq, &qi); |
1024 | if (ret) { | |
1025 | ATH5K_ERR(sc, "%s: unable to update parameters for beacon " | |
1026 | "hardware queue!\n", __func__); | |
1027 | goto err; | |
1028 | } | |
1029 | ret = ath5k_hw_reset_tx_queue(ah, sc->bhalq); /* push to h/w */ | |
1030 | if (ret) | |
1031 | goto err; | |
b7266047 | 1032 | |
8a63facc BC |
1033 | /* reconfigure cabq with ready time to 80% of beacon_interval */ |
1034 | ret = ath5k_hw_get_tx_queueprops(ah, AR5K_TX_QUEUE_ID_CAB, &qi); | |
1035 | if (ret) | |
1036 | goto err; | |
b7266047 | 1037 | |
8a63facc BC |
1038 | qi.tqi_ready_time = (sc->bintval * 80) / 100; |
1039 | ret = ath5k_hw_set_tx_queueprops(ah, AR5K_TX_QUEUE_ID_CAB, &qi); | |
1040 | if (ret) | |
1041 | goto err; | |
b7266047 | 1042 | |
8a63facc BC |
1043 | ret = ath5k_hw_reset_tx_queue(ah, AR5K_TX_QUEUE_ID_CAB); |
1044 | err: | |
1045 | return ret; | |
d8ee398d LR |
1046 | } |
1047 | ||
80dac9ee NK |
1048 | /** |
1049 | * ath5k_drain_tx_buffs - Empty tx buffers | |
1050 | * | |
1051 | * @sc The &struct ath5k_softc | |
1052 | * | |
1053 | * Empty tx buffers from all queues in preparation | |
1054 | * of a reset or during shutdown. | |
1055 | * | |
1056 | * NB: this assumes output has been stopped and | |
1057 | * we do not need to block ath5k_tx_tasklet | |
1058 | */ | |
8a63facc | 1059 | static void |
80dac9ee | 1060 | ath5k_drain_tx_buffs(struct ath5k_softc *sc) |
8a63facc | 1061 | { |
80dac9ee | 1062 | struct ath5k_txq *txq; |
8a63facc | 1063 | struct ath5k_buf *bf, *bf0; |
80dac9ee | 1064 | int i; |
b6ea0356 | 1065 | |
80dac9ee NK |
1066 | for (i = 0; i < ARRAY_SIZE(sc->txqs); i++) { |
1067 | if (sc->txqs[i].setup) { | |
1068 | txq = &sc->txqs[i]; | |
1069 | spin_lock_bh(&txq->lock); | |
1070 | list_for_each_entry_safe(bf, bf0, &txq->q, list) { | |
1071 | ath5k_debug_printtxbuf(sc, bf); | |
b6ea0356 | 1072 | |
80dac9ee | 1073 | ath5k_txbuf_free_skb(sc, bf); |
fa1c114f | 1074 | |
80dac9ee NK |
1075 | spin_lock_bh(&sc->txbuflock); |
1076 | list_move_tail(&bf->list, &sc->txbuf); | |
1077 | sc->txbuf_len++; | |
1078 | txq->txq_len--; | |
1079 | spin_unlock_bh(&sc->txbuflock); | |
8a63facc | 1080 | } |
80dac9ee NK |
1081 | txq->link = NULL; |
1082 | txq->txq_poll_mark = false; | |
1083 | spin_unlock_bh(&txq->lock); | |
1084 | } | |
0452d4a5 | 1085 | } |
fa1c114f JS |
1086 | } |
1087 | ||
8a63facc BC |
1088 | static void |
1089 | ath5k_txq_release(struct ath5k_softc *sc) | |
2ac2927a | 1090 | { |
8a63facc BC |
1091 | struct ath5k_txq *txq = sc->txqs; |
1092 | unsigned int i; | |
2ac2927a | 1093 | |
8a63facc BC |
1094 | for (i = 0; i < ARRAY_SIZE(sc->txqs); i++, txq++) |
1095 | if (txq->setup) { | |
1096 | ath5k_hw_release_tx_queue(sc->ah, txq->qnum); | |
1097 | txq->setup = false; | |
1098 | } | |
1099 | } | |
2ac2927a | 1100 | |
2ac2927a | 1101 | |
8a63facc BC |
1102 | /*************\ |
1103 | * RX Handling * | |
1104 | \*************/ | |
2ac2927a | 1105 | |
8a63facc BC |
1106 | /* |
1107 | * Enable the receive h/w following a reset. | |
1108 | */ | |
fa1c114f | 1109 | static int |
8a63facc | 1110 | ath5k_rx_start(struct ath5k_softc *sc) |
fa1c114f JS |
1111 | { |
1112 | struct ath5k_hw *ah = sc->ah; | |
8a63facc BC |
1113 | struct ath_common *common = ath5k_hw_common(ah); |
1114 | struct ath5k_buf *bf; | |
1115 | int ret; | |
fa1c114f | 1116 | |
8a63facc | 1117 | common->rx_bufsize = roundup(IEEE80211_MAX_FRAME_LEN, common->cachelsz); |
fa1c114f | 1118 | |
8a63facc BC |
1119 | ATH5K_DBG(sc, ATH5K_DEBUG_RESET, "cachelsz %u rx_bufsize %u\n", |
1120 | common->cachelsz, common->rx_bufsize); | |
2f7fe870 | 1121 | |
8a63facc BC |
1122 | spin_lock_bh(&sc->rxbuflock); |
1123 | sc->rxlink = NULL; | |
1124 | list_for_each_entry(bf, &sc->rxbuf, list) { | |
1125 | ret = ath5k_rxbuf_setup(sc, bf); | |
1126 | if (ret != 0) { | |
1127 | spin_unlock_bh(&sc->rxbuflock); | |
1128 | goto err; | |
1129 | } | |
2f7fe870 | 1130 | } |
8a63facc BC |
1131 | bf = list_first_entry(&sc->rxbuf, struct ath5k_buf, list); |
1132 | ath5k_hw_set_rxdp(ah, bf->daddr); | |
1133 | spin_unlock_bh(&sc->rxbuflock); | |
2f7fe870 | 1134 | |
8a63facc | 1135 | ath5k_hw_start_rx_dma(ah); /* enable recv descriptors */ |
b1ae1edf | 1136 | ath5k_mode_setup(sc, NULL); /* set filters, etc. */ |
8a63facc | 1137 | ath5k_hw_start_rx_pcu(ah); /* re-enable PCU/DMA engine */ |
fa1c114f JS |
1138 | |
1139 | return 0; | |
8a63facc | 1140 | err: |
fa1c114f JS |
1141 | return ret; |
1142 | } | |
1143 | ||
8a63facc | 1144 | /* |
80dac9ee NK |
1145 | * Disable the receive logic on PCU (DRU) |
1146 | * In preparation for a shutdown. | |
1147 | * | |
1148 | * Note: Doesn't stop rx DMA, ath5k_hw_dma_stop | |
1149 | * does. | |
8a63facc BC |
1150 | */ |
1151 | static void | |
1152 | ath5k_rx_stop(struct ath5k_softc *sc) | |
fa1c114f | 1153 | { |
8a63facc | 1154 | struct ath5k_hw *ah = sc->ah; |
fa1c114f | 1155 | |
8a63facc | 1156 | ath5k_hw_set_rx_filter(ah, 0); /* clear recv filter */ |
80dac9ee | 1157 | ath5k_hw_stop_rx_pcu(ah); /* disable PCU */ |
fa1c114f | 1158 | |
8a63facc BC |
1159 | ath5k_debug_printrxbuffs(sc, ah); |
1160 | } | |
fa1c114f | 1161 | |
8a63facc BC |
1162 | static unsigned int |
1163 | ath5k_rx_decrypted(struct ath5k_softc *sc, struct sk_buff *skb, | |
1164 | struct ath5k_rx_status *rs) | |
1165 | { | |
1166 | struct ath5k_hw *ah = sc->ah; | |
1167 | struct ath_common *common = ath5k_hw_common(ah); | |
1168 | struct ieee80211_hdr *hdr = (void *)skb->data; | |
1169 | unsigned int keyix, hlen; | |
fa1c114f | 1170 | |
8a63facc BC |
1171 | if (!(rs->rs_status & AR5K_RXERR_DECRYPT) && |
1172 | rs->rs_keyix != AR5K_RXKEYIX_INVALID) | |
1173 | return RX_FLAG_DECRYPTED; | |
fa1c114f | 1174 | |
8a63facc BC |
1175 | /* Apparently when a default key is used to decrypt the packet |
1176 | the hw does not set the index used to decrypt. In such cases | |
1177 | get the index from the packet. */ | |
1178 | hlen = ieee80211_hdrlen(hdr->frame_control); | |
1179 | if (ieee80211_has_protected(hdr->frame_control) && | |
1180 | !(rs->rs_status & AR5K_RXERR_DECRYPT) && | |
1181 | skb->len >= hlen + 4) { | |
1182 | keyix = skb->data[hlen + 3] >> 6; | |
1183 | ||
1184 | if (test_bit(keyix, common->keymap)) | |
1185 | return RX_FLAG_DECRYPTED; | |
1186 | } | |
fa1c114f JS |
1187 | |
1188 | return 0; | |
fa1c114f JS |
1189 | } |
1190 | ||
8a63facc | 1191 | |
fa1c114f | 1192 | static void |
8a63facc BC |
1193 | ath5k_check_ibss_tsf(struct ath5k_softc *sc, struct sk_buff *skb, |
1194 | struct ieee80211_rx_status *rxs) | |
fa1c114f | 1195 | { |
8a63facc BC |
1196 | struct ath_common *common = ath5k_hw_common(sc->ah); |
1197 | u64 tsf, bc_tstamp; | |
1198 | u32 hw_tu; | |
1199 | struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)skb->data; | |
fa1c114f | 1200 | |
8a63facc BC |
1201 | if (ieee80211_is_beacon(mgmt->frame_control) && |
1202 | le16_to_cpu(mgmt->u.beacon.capab_info) & WLAN_CAPABILITY_IBSS && | |
1203 | memcmp(mgmt->bssid, common->curbssid, ETH_ALEN) == 0) { | |
1204 | /* | |
1205 | * Received an IBSS beacon with the same BSSID. Hardware *must* | |
1206 | * have updated the local TSF. We have to work around various | |
1207 | * hardware bugs, though... | |
1208 | */ | |
1209 | tsf = ath5k_hw_get_tsf64(sc->ah); | |
1210 | bc_tstamp = le64_to_cpu(mgmt->u.beacon.timestamp); | |
1211 | hw_tu = TSF_TO_TU(tsf); | |
fa1c114f | 1212 | |
8a63facc BC |
1213 | ATH5K_DBG_UNLIMIT(sc, ATH5K_DEBUG_BEACON, |
1214 | "beacon %llx mactime %llx (diff %lld) tsf now %llx\n", | |
1215 | (unsigned long long)bc_tstamp, | |
1216 | (unsigned long long)rxs->mactime, | |
1217 | (unsigned long long)(rxs->mactime - bc_tstamp), | |
1218 | (unsigned long long)tsf); | |
fa1c114f | 1219 | |
8a63facc BC |
1220 | /* |
1221 | * Sometimes the HW will give us a wrong tstamp in the rx | |
1222 | * status, causing the timestamp extension to go wrong. | |
1223 | * (This seems to happen especially with beacon frames bigger | |
1224 | * than 78 byte (incl. FCS)) | |
1225 | * But we know that the receive timestamp must be later than the | |
1226 | * timestamp of the beacon since HW must have synced to that. | |
1227 | * | |
1228 | * NOTE: here we assume mactime to be after the frame was | |
1229 | * received, not like mac80211 which defines it at the start. | |
1230 | */ | |
1231 | if (bc_tstamp > rxs->mactime) { | |
1232 | ATH5K_DBG_UNLIMIT(sc, ATH5K_DEBUG_BEACON, | |
1233 | "fixing mactime from %llx to %llx\n", | |
1234 | (unsigned long long)rxs->mactime, | |
1235 | (unsigned long long)tsf); | |
1236 | rxs->mactime = tsf; | |
1237 | } | |
fa1c114f | 1238 | |
8a63facc BC |
1239 | /* |
1240 | * Local TSF might have moved higher than our beacon timers, | |
1241 | * in that case we have to update them to continue sending | |
1242 | * beacons. This also takes care of synchronizing beacon sending | |
1243 | * times with other stations. | |
1244 | */ | |
1245 | if (hw_tu >= sc->nexttbtt) | |
1246 | ath5k_beacon_update_timers(sc, bc_tstamp); | |
7f896126 BR |
1247 | |
1248 | /* Check if the beacon timers are still correct, because a TSF | |
1249 | * update might have created a window between them - for a | |
1250 | * longer description see the comment of this function: */ | |
1251 | if (!ath5k_hw_check_beacon_timers(sc->ah, sc->bintval)) { | |
1252 | ath5k_beacon_update_timers(sc, bc_tstamp); | |
1253 | ATH5K_DBG_UNLIMIT(sc, ATH5K_DEBUG_BEACON, | |
1254 | "fixed beacon timers after beacon receive\n"); | |
1255 | } | |
8a63facc BC |
1256 | } |
1257 | } | |
fa1c114f | 1258 | |
8a63facc BC |
1259 | static void |
1260 | ath5k_update_beacon_rssi(struct ath5k_softc *sc, struct sk_buff *skb, int rssi) | |
1261 | { | |
1262 | struct ieee80211_mgmt *mgmt = (struct ieee80211_mgmt *)skb->data; | |
1263 | struct ath5k_hw *ah = sc->ah; | |
1264 | struct ath_common *common = ath5k_hw_common(ah); | |
fa1c114f | 1265 | |
8a63facc BC |
1266 | /* only beacons from our BSSID */ |
1267 | if (!ieee80211_is_beacon(mgmt->frame_control) || | |
1268 | memcmp(mgmt->bssid, common->curbssid, ETH_ALEN) != 0) | |
1269 | return; | |
fa1c114f | 1270 | |
eef39bef | 1271 | ewma_add(&ah->ah_beacon_rssi_avg, rssi); |
fa1c114f | 1272 | |
8a63facc BC |
1273 | /* in IBSS mode we should keep RSSI statistics per neighbour */ |
1274 | /* le16_to_cpu(mgmt->u.beacon.capab_info) & WLAN_CAPABILITY_IBSS */ | |
1275 | } | |
fa1c114f | 1276 | |
8a63facc BC |
1277 | /* |
1278 | * Compute padding position. skb must contain an IEEE 802.11 frame | |
1279 | */ | |
1280 | static int ath5k_common_padpos(struct sk_buff *skb) | |
fa1c114f | 1281 | { |
8a63facc BC |
1282 | struct ieee80211_hdr * hdr = (struct ieee80211_hdr *)skb->data; |
1283 | __le16 frame_control = hdr->frame_control; | |
1284 | int padpos = 24; | |
fa1c114f | 1285 | |
8a63facc BC |
1286 | if (ieee80211_has_a4(frame_control)) { |
1287 | padpos += ETH_ALEN; | |
fa1c114f | 1288 | } |
8a63facc BC |
1289 | if (ieee80211_is_data_qos(frame_control)) { |
1290 | padpos += IEEE80211_QOS_CTL_LEN; | |
fa1c114f | 1291 | } |
8a63facc BC |
1292 | |
1293 | return padpos; | |
fa1c114f JS |
1294 | } |
1295 | ||
8a63facc BC |
1296 | /* |
1297 | * This function expects an 802.11 frame and returns the number of | |
1298 | * bytes added, or -1 if we don't have enough header room. | |
1299 | */ | |
1300 | static int ath5k_add_padding(struct sk_buff *skb) | |
fa1c114f | 1301 | { |
8a63facc BC |
1302 | int padpos = ath5k_common_padpos(skb); |
1303 | int padsize = padpos & 3; | |
fa1c114f | 1304 | |
8a63facc | 1305 | if (padsize && skb->len>padpos) { |
fa1c114f | 1306 | |
8a63facc BC |
1307 | if (skb_headroom(skb) < padsize) |
1308 | return -1; | |
fa1c114f | 1309 | |
8a63facc BC |
1310 | skb_push(skb, padsize); |
1311 | memmove(skb->data, skb->data+padsize, padpos); | |
1312 | return padsize; | |
1313 | } | |
a951ae21 | 1314 | |
8a63facc BC |
1315 | return 0; |
1316 | } | |
fa1c114f | 1317 | |
8a63facc BC |
1318 | /* |
1319 | * The MAC header is padded to have 32-bit boundary if the | |
1320 | * packet payload is non-zero. The general calculation for | |
1321 | * padsize would take into account odd header lengths: | |
1322 | * padsize = 4 - (hdrlen & 3); however, since only | |
1323 | * even-length headers are used, padding can only be 0 or 2 | |
1324 | * bytes and we can optimize this a bit. We must not try to | |
1325 | * remove padding from short control frames that do not have a | |
1326 | * payload. | |
1327 | * | |
1328 | * This function expects an 802.11 frame and returns the number of | |
1329 | * bytes removed. | |
1330 | */ | |
1331 | static int ath5k_remove_padding(struct sk_buff *skb) | |
1332 | { | |
1333 | int padpos = ath5k_common_padpos(skb); | |
1334 | int padsize = padpos & 3; | |
6d91e1d8 | 1335 | |
8a63facc BC |
1336 | if (padsize && skb->len>=padpos+padsize) { |
1337 | memmove(skb->data + padsize, skb->data, padpos); | |
1338 | skb_pull(skb, padsize); | |
1339 | return padsize; | |
fa1c114f | 1340 | } |
a951ae21 | 1341 | |
8a63facc | 1342 | return 0; |
fa1c114f JS |
1343 | } |
1344 | ||
1345 | static void | |
8a63facc BC |
1346 | ath5k_receive_frame(struct ath5k_softc *sc, struct sk_buff *skb, |
1347 | struct ath5k_rx_status *rs) | |
fa1c114f | 1348 | { |
8a63facc BC |
1349 | struct ieee80211_rx_status *rxs; |
1350 | ||
1351 | ath5k_remove_padding(skb); | |
1352 | ||
1353 | rxs = IEEE80211_SKB_RXCB(skb); | |
1354 | ||
1355 | rxs->flag = 0; | |
1356 | if (unlikely(rs->rs_status & AR5K_RXERR_MIC)) | |
1357 | rxs->flag |= RX_FLAG_MMIC_ERROR; | |
fa1c114f JS |
1358 | |
1359 | /* | |
8a63facc BC |
1360 | * always extend the mac timestamp, since this information is |
1361 | * also needed for proper IBSS merging. | |
1362 | * | |
1363 | * XXX: it might be too late to do it here, since rs_tstamp is | |
1364 | * 15bit only. that means TSF extension has to be done within | |
1365 | * 32768usec (about 32ms). it might be necessary to move this to | |
1366 | * the interrupt handler, like it is done in madwifi. | |
1367 | * | |
1368 | * Unfortunately we don't know when the hardware takes the rx | |
1369 | * timestamp (beginning of phy frame, data frame, end of rx?). | |
1370 | * The only thing we know is that it is hardware specific... | |
1371 | * On AR5213 it seems the rx timestamp is at the end of the | |
1372 | * frame, but i'm not sure. | |
1373 | * | |
1374 | * NOTE: mac80211 defines mactime at the beginning of the first | |
1375 | * data symbol. Since we don't have any time references it's | |
1376 | * impossible to comply to that. This affects IBSS merge only | |
1377 | * right now, so it's not too bad... | |
fa1c114f | 1378 | */ |
8a63facc BC |
1379 | rxs->mactime = ath5k_extend_tsf(sc->ah, rs->rs_tstamp); |
1380 | rxs->flag |= RX_FLAG_TSFT; | |
fa1c114f | 1381 | |
8a63facc BC |
1382 | rxs->freq = sc->curchan->center_freq; |
1383 | rxs->band = sc->curband->band; | |
fa1c114f | 1384 | |
8a63facc | 1385 | rxs->signal = sc->ah->ah_noise_floor + rs->rs_rssi; |
fa1c114f | 1386 | |
8a63facc | 1387 | rxs->antenna = rs->rs_antenna; |
fa1c114f | 1388 | |
8a63facc BC |
1389 | if (rs->rs_antenna > 0 && rs->rs_antenna < 5) |
1390 | sc->stats.antenna_rx[rs->rs_antenna]++; | |
1391 | else | |
1392 | sc->stats.antenna_rx[0]++; /* invalid */ | |
fa1c114f | 1393 | |
8a63facc BC |
1394 | rxs->rate_idx = ath5k_hw_to_driver_rix(sc, rs->rs_rate); |
1395 | rxs->flag |= ath5k_rx_decrypted(sc, skb, rs); | |
fa1c114f | 1396 | |
8a63facc BC |
1397 | if (rxs->rate_idx >= 0 && rs->rs_rate == |
1398 | sc->curband->bitrates[rxs->rate_idx].hw_value_short) | |
1399 | rxs->flag |= RX_FLAG_SHORTPRE; | |
fa1c114f | 1400 | |
8a63facc | 1401 | ath5k_debug_dump_skb(sc, skb, "RX ", 0); |
fa1c114f | 1402 | |
8a63facc | 1403 | ath5k_update_beacon_rssi(sc, skb, rs->rs_rssi); |
fa1c114f | 1404 | |
8a63facc BC |
1405 | /* check beacons in IBSS mode */ |
1406 | if (sc->opmode == NL80211_IFTYPE_ADHOC) | |
1407 | ath5k_check_ibss_tsf(sc, skb, rxs); | |
fa1c114f | 1408 | |
8a63facc BC |
1409 | ieee80211_rx(sc->hw, skb); |
1410 | } | |
fa1c114f | 1411 | |
8a63facc BC |
1412 | /** ath5k_frame_receive_ok() - Do we want to receive this frame or not? |
1413 | * | |
1414 | * Check if we want to further process this frame or not. Also update | |
1415 | * statistics. Return true if we want this frame, false if not. | |
fa1c114f | 1416 | */ |
8a63facc BC |
1417 | static bool |
1418 | ath5k_receive_frame_ok(struct ath5k_softc *sc, struct ath5k_rx_status *rs) | |
fa1c114f | 1419 | { |
8a63facc | 1420 | sc->stats.rx_all_count++; |
b72acddb | 1421 | sc->stats.rx_bytes_count += rs->rs_datalen; |
fa1c114f | 1422 | |
8a63facc BC |
1423 | if (unlikely(rs->rs_status)) { |
1424 | if (rs->rs_status & AR5K_RXERR_CRC) | |
1425 | sc->stats.rxerr_crc++; | |
1426 | if (rs->rs_status & AR5K_RXERR_FIFO) | |
1427 | sc->stats.rxerr_fifo++; | |
1428 | if (rs->rs_status & AR5K_RXERR_PHY) { | |
1429 | sc->stats.rxerr_phy++; | |
1430 | if (rs->rs_phyerr > 0 && rs->rs_phyerr < 32) | |
1431 | sc->stats.rxerr_phy_code[rs->rs_phyerr]++; | |
1432 | return false; | |
1433 | } | |
1434 | if (rs->rs_status & AR5K_RXERR_DECRYPT) { | |
1435 | /* | |
1436 | * Decrypt error. If the error occurred | |
1437 | * because there was no hardware key, then | |
1438 | * let the frame through so the upper layers | |
1439 | * can process it. This is necessary for 5210 | |
1440 | * parts which have no way to setup a ``clear'' | |
1441 | * key cache entry. | |
1442 | * | |
1443 | * XXX do key cache faulting | |
1444 | */ | |
1445 | sc->stats.rxerr_decrypt++; | |
1446 | if (rs->rs_keyix == AR5K_RXKEYIX_INVALID && | |
1447 | !(rs->rs_status & AR5K_RXERR_CRC)) | |
1448 | return true; | |
1449 | } | |
1450 | if (rs->rs_status & AR5K_RXERR_MIC) { | |
1451 | sc->stats.rxerr_mic++; | |
1452 | return true; | |
fa1c114f | 1453 | } |
fa1c114f | 1454 | |
8a63facc BC |
1455 | /* reject any frames with non-crypto errors */ |
1456 | if (rs->rs_status & ~(AR5K_RXERR_DECRYPT)) | |
1457 | return false; | |
1458 | } | |
fa1c114f | 1459 | |
8a63facc BC |
1460 | if (unlikely(rs->rs_more)) { |
1461 | sc->stats.rxerr_jumbo++; | |
1462 | return false; | |
1463 | } | |
1464 | return true; | |
fa1c114f JS |
1465 | } |
1466 | ||
fa1c114f | 1467 | static void |
8a63facc | 1468 | ath5k_tasklet_rx(unsigned long data) |
fa1c114f | 1469 | { |
8a63facc BC |
1470 | struct ath5k_rx_status rs = {}; |
1471 | struct sk_buff *skb, *next_skb; | |
1472 | dma_addr_t next_skb_addr; | |
1473 | struct ath5k_softc *sc = (void *)data; | |
dc1e001b LR |
1474 | struct ath5k_hw *ah = sc->ah; |
1475 | struct ath_common *common = ath5k_hw_common(ah); | |
8a63facc BC |
1476 | struct ath5k_buf *bf; |
1477 | struct ath5k_desc *ds; | |
1478 | int ret; | |
fa1c114f | 1479 | |
8a63facc BC |
1480 | spin_lock(&sc->rxbuflock); |
1481 | if (list_empty(&sc->rxbuf)) { | |
1482 | ATH5K_WARN(sc, "empty rx buf pool\n"); | |
1483 | goto unlock; | |
1484 | } | |
1485 | do { | |
1486 | bf = list_first_entry(&sc->rxbuf, struct ath5k_buf, list); | |
1487 | BUG_ON(bf->skb == NULL); | |
1488 | skb = bf->skb; | |
1489 | ds = bf->desc; | |
fa1c114f | 1490 | |
8a63facc BC |
1491 | /* bail if HW is still using self-linked descriptor */ |
1492 | if (ath5k_hw_get_rxdp(sc->ah) == bf->daddr) | |
1493 | break; | |
fa1c114f | 1494 | |
8a63facc BC |
1495 | ret = sc->ah->ah_proc_rx_desc(sc->ah, ds, &rs); |
1496 | if (unlikely(ret == -EINPROGRESS)) | |
1497 | break; | |
1498 | else if (unlikely(ret)) { | |
1499 | ATH5K_ERR(sc, "error in processing rx descriptor\n"); | |
1500 | sc->stats.rxerr_proc++; | |
1501 | break; | |
1502 | } | |
fa1c114f | 1503 | |
8a63facc BC |
1504 | if (ath5k_receive_frame_ok(sc, &rs)) { |
1505 | next_skb = ath5k_rx_skb_alloc(sc, &next_skb_addr); | |
fa1c114f | 1506 | |
8a63facc BC |
1507 | /* |
1508 | * If we can't replace bf->skb with a new skb under | |
1509 | * memory pressure, just skip this packet | |
1510 | */ | |
1511 | if (!next_skb) | |
1512 | goto next; | |
036cd1ec | 1513 | |
aeae4ac9 | 1514 | dma_unmap_single(sc->dev, bf->skbaddr, |
8a63facc | 1515 | common->rx_bufsize, |
aeae4ac9 | 1516 | DMA_FROM_DEVICE); |
036cd1ec | 1517 | |
8a63facc | 1518 | skb_put(skb, rs.rs_datalen); |
6ba81c2c | 1519 | |
8a63facc | 1520 | ath5k_receive_frame(sc, skb, &rs); |
6ba81c2c | 1521 | |
8a63facc BC |
1522 | bf->skb = next_skb; |
1523 | bf->skbaddr = next_skb_addr; | |
036cd1ec | 1524 | } |
8a63facc BC |
1525 | next: |
1526 | list_move_tail(&bf->list, &sc->rxbuf); | |
1527 | } while (ath5k_rxbuf_setup(sc, bf) == 0); | |
1528 | unlock: | |
1529 | spin_unlock(&sc->rxbuflock); | |
036cd1ec BR |
1530 | } |
1531 | ||
b4ea449d | 1532 | |
8a63facc BC |
1533 | /*************\ |
1534 | * TX Handling * | |
1535 | \*************/ | |
b4ea449d | 1536 | |
8a63facc BC |
1537 | static int ath5k_tx_queue(struct ieee80211_hw *hw, struct sk_buff *skb, |
1538 | struct ath5k_txq *txq) | |
1539 | { | |
1540 | struct ath5k_softc *sc = hw->priv; | |
1541 | struct ath5k_buf *bf; | |
1542 | unsigned long flags; | |
1543 | int padsize; | |
b4ea449d | 1544 | |
8a63facc | 1545 | ath5k_debug_dump_skb(sc, skb, "TX ", 1); |
b4ea449d | 1546 | |
8a63facc BC |
1547 | /* |
1548 | * The hardware expects the header padded to 4 byte boundaries. | |
1549 | * If this is not the case, we add the padding after the header. | |
1550 | */ | |
1551 | padsize = ath5k_add_padding(skb); | |
1552 | if (padsize < 0) { | |
1553 | ATH5K_ERR(sc, "tx hdrlen not %%4: not enough" | |
1554 | " headroom to pad"); | |
1555 | goto drop_packet; | |
1556 | } | |
8127fbdc | 1557 | |
925e0b06 BR |
1558 | if (txq->txq_len >= ATH5K_TXQ_LEN_MAX) |
1559 | ieee80211_stop_queue(hw, txq->qnum); | |
1560 | ||
8a63facc BC |
1561 | spin_lock_irqsave(&sc->txbuflock, flags); |
1562 | if (list_empty(&sc->txbuf)) { | |
1563 | ATH5K_ERR(sc, "no further txbuf available, dropping packet\n"); | |
1564 | spin_unlock_irqrestore(&sc->txbuflock, flags); | |
651d9375 | 1565 | ieee80211_stop_queues(hw); |
8a63facc | 1566 | goto drop_packet; |
8127fbdc | 1567 | } |
8a63facc BC |
1568 | bf = list_first_entry(&sc->txbuf, struct ath5k_buf, list); |
1569 | list_del(&bf->list); | |
1570 | sc->txbuf_len--; | |
1571 | if (list_empty(&sc->txbuf)) | |
1572 | ieee80211_stop_queues(hw); | |
1573 | spin_unlock_irqrestore(&sc->txbuflock, flags); | |
1574 | ||
1575 | bf->skb = skb; | |
1576 | ||
1577 | if (ath5k_txbuf_setup(sc, bf, txq, padsize)) { | |
1578 | bf->skb = NULL; | |
1579 | spin_lock_irqsave(&sc->txbuflock, flags); | |
1580 | list_add_tail(&bf->list, &sc->txbuf); | |
1581 | sc->txbuf_len++; | |
1582 | spin_unlock_irqrestore(&sc->txbuflock, flags); | |
1583 | goto drop_packet; | |
8127fbdc | 1584 | } |
8a63facc | 1585 | return NETDEV_TX_OK; |
8127fbdc | 1586 | |
8a63facc BC |
1587 | drop_packet: |
1588 | dev_kfree_skb_any(skb); | |
1589 | return NETDEV_TX_OK; | |
8127fbdc BP |
1590 | } |
1591 | ||
1440401e BR |
1592 | static void |
1593 | ath5k_tx_frame_completed(struct ath5k_softc *sc, struct sk_buff *skb, | |
1594 | struct ath5k_tx_status *ts) | |
1595 | { | |
1596 | struct ieee80211_tx_info *info; | |
1597 | int i; | |
1598 | ||
1599 | sc->stats.tx_all_count++; | |
b72acddb | 1600 | sc->stats.tx_bytes_count += skb->len; |
1440401e BR |
1601 | info = IEEE80211_SKB_CB(skb); |
1602 | ||
1603 | ieee80211_tx_info_clear_status(info); | |
1604 | for (i = 0; i < 4; i++) { | |
1605 | struct ieee80211_tx_rate *r = | |
1606 | &info->status.rates[i]; | |
1607 | ||
1608 | if (ts->ts_rate[i]) { | |
1609 | r->idx = ath5k_hw_to_driver_rix(sc, ts->ts_rate[i]); | |
1610 | r->count = ts->ts_retry[i]; | |
1611 | } else { | |
1612 | r->idx = -1; | |
1613 | r->count = 0; | |
1614 | } | |
1615 | } | |
1616 | ||
1617 | /* count the successful attempt as well */ | |
1618 | info->status.rates[ts->ts_final_idx].count++; | |
1619 | ||
1620 | if (unlikely(ts->ts_status)) { | |
1621 | sc->stats.ack_fail++; | |
1622 | if (ts->ts_status & AR5K_TXERR_FILT) { | |
1623 | info->flags |= IEEE80211_TX_STAT_TX_FILTERED; | |
1624 | sc->stats.txerr_filt++; | |
1625 | } | |
1626 | if (ts->ts_status & AR5K_TXERR_XRETRY) | |
1627 | sc->stats.txerr_retry++; | |
1628 | if (ts->ts_status & AR5K_TXERR_FIFO) | |
1629 | sc->stats.txerr_fifo++; | |
1630 | } else { | |
1631 | info->flags |= IEEE80211_TX_STAT_ACK; | |
1632 | info->status.ack_signal = ts->ts_rssi; | |
1633 | } | |
1634 | ||
1635 | /* | |
1636 | * Remove MAC header padding before giving the frame | |
1637 | * back to mac80211. | |
1638 | */ | |
1639 | ath5k_remove_padding(skb); | |
1640 | ||
1641 | if (ts->ts_antenna > 0 && ts->ts_antenna < 5) | |
1642 | sc->stats.antenna_tx[ts->ts_antenna]++; | |
1643 | else | |
1644 | sc->stats.antenna_tx[0]++; /* invalid */ | |
1645 | ||
1646 | ieee80211_tx_status(sc->hw, skb); | |
1647 | } | |
8a63facc BC |
1648 | |
1649 | static void | |
1650 | ath5k_tx_processq(struct ath5k_softc *sc, struct ath5k_txq *txq) | |
8127fbdc | 1651 | { |
8a63facc BC |
1652 | struct ath5k_tx_status ts = {}; |
1653 | struct ath5k_buf *bf, *bf0; | |
1654 | struct ath5k_desc *ds; | |
1655 | struct sk_buff *skb; | |
1440401e | 1656 | int ret; |
8127fbdc | 1657 | |
8a63facc BC |
1658 | spin_lock(&txq->lock); |
1659 | list_for_each_entry_safe(bf, bf0, &txq->q, list) { | |
23413296 BR |
1660 | |
1661 | txq->txq_poll_mark = false; | |
1662 | ||
1663 | /* skb might already have been processed last time. */ | |
1664 | if (bf->skb != NULL) { | |
1665 | ds = bf->desc; | |
1666 | ||
1667 | ret = sc->ah->ah_proc_tx_desc(sc->ah, ds, &ts); | |
1668 | if (unlikely(ret == -EINPROGRESS)) | |
1669 | break; | |
1670 | else if (unlikely(ret)) { | |
1671 | ATH5K_ERR(sc, | |
1672 | "error %d while processing " | |
1673 | "queue %u\n", ret, txq->qnum); | |
1674 | break; | |
1675 | } | |
1676 | ||
1677 | skb = bf->skb; | |
1678 | bf->skb = NULL; | |
aeae4ac9 FF |
1679 | |
1680 | dma_unmap_single(sc->dev, bf->skbaddr, skb->len, | |
1681 | DMA_TO_DEVICE); | |
23413296 BR |
1682 | ath5k_tx_frame_completed(sc, skb, &ts); |
1683 | } | |
8127fbdc | 1684 | |
8a63facc BC |
1685 | /* |
1686 | * It's possible that the hardware can say the buffer is | |
1687 | * completed when it hasn't yet loaded the ds_link from | |
23413296 BR |
1688 | * host memory and moved on. |
1689 | * Always keep the last descriptor to avoid HW races... | |
8a63facc | 1690 | */ |
23413296 BR |
1691 | if (ath5k_hw_get_txdp(sc->ah, txq->qnum) != bf->daddr) { |
1692 | spin_lock(&sc->txbuflock); | |
1693 | list_move_tail(&bf->list, &sc->txbuf); | |
1694 | sc->txbuf_len++; | |
1695 | txq->txq_len--; | |
1696 | spin_unlock(&sc->txbuflock); | |
8a63facc | 1697 | } |
fa1c114f | 1698 | } |
fa1c114f | 1699 | spin_unlock(&txq->lock); |
4198a8d0 | 1700 | if (txq->txq_len < ATH5K_TXQ_LEN_LOW && txq->qnum < 4) |
925e0b06 | 1701 | ieee80211_wake_queue(sc->hw, txq->qnum); |
fa1c114f JS |
1702 | } |
1703 | ||
1704 | static void | |
1705 | ath5k_tasklet_tx(unsigned long data) | |
1706 | { | |
8784d2ee | 1707 | int i; |
fa1c114f JS |
1708 | struct ath5k_softc *sc = (void *)data; |
1709 | ||
8784d2ee BC |
1710 | for (i=0; i < AR5K_NUM_TX_QUEUES; i++) |
1711 | if (sc->txqs[i].setup && (sc->ah->ah_txq_isr & BIT(i))) | |
1712 | ath5k_tx_processq(sc, &sc->txqs[i]); | |
fa1c114f JS |
1713 | } |
1714 | ||
1715 | ||
fa1c114f JS |
1716 | /*****************\ |
1717 | * Beacon handling * | |
1718 | \*****************/ | |
1719 | ||
1720 | /* | |
1721 | * Setup the beacon frame for transmit. | |
1722 | */ | |
1723 | static int | |
e039fa4a | 1724 | ath5k_beacon_setup(struct ath5k_softc *sc, struct ath5k_buf *bf) |
fa1c114f JS |
1725 | { |
1726 | struct sk_buff *skb = bf->skb; | |
a888d52d | 1727 | struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); |
fa1c114f JS |
1728 | struct ath5k_hw *ah = sc->ah; |
1729 | struct ath5k_desc *ds; | |
2bed03eb NK |
1730 | int ret = 0; |
1731 | u8 antenna; | |
fa1c114f | 1732 | u32 flags; |
8127fbdc | 1733 | const int padsize = 0; |
fa1c114f | 1734 | |
aeae4ac9 FF |
1735 | bf->skbaddr = dma_map_single(sc->dev, skb->data, skb->len, |
1736 | DMA_TO_DEVICE); | |
fa1c114f JS |
1737 | ATH5K_DBG(sc, ATH5K_DEBUG_BEACON, "skb %p [data %p len %u] " |
1738 | "skbaddr %llx\n", skb, skb->data, skb->len, | |
1739 | (unsigned long long)bf->skbaddr); | |
aeae4ac9 FF |
1740 | |
1741 | if (dma_mapping_error(sc->dev, bf->skbaddr)) { | |
fa1c114f JS |
1742 | ATH5K_ERR(sc, "beacon DMA mapping failed\n"); |
1743 | return -EIO; | |
1744 | } | |
1745 | ||
1746 | ds = bf->desc; | |
2bed03eb | 1747 | antenna = ah->ah_tx_ant; |
fa1c114f JS |
1748 | |
1749 | flags = AR5K_TXDESC_NOACK; | |
05c914fe | 1750 | if (sc->opmode == NL80211_IFTYPE_ADHOC && ath5k_hw_hasveol(ah)) { |
fa1c114f JS |
1751 | ds->ds_link = bf->daddr; /* self-linked */ |
1752 | flags |= AR5K_TXDESC_VEOL; | |
2bed03eb | 1753 | } else |
fa1c114f | 1754 | ds->ds_link = 0; |
2bed03eb NK |
1755 | |
1756 | /* | |
1757 | * If we use multiple antennas on AP and use | |
1758 | * the Sectored AP scenario, switch antenna every | |
1759 | * 4 beacons to make sure everybody hears our AP. | |
1760 | * When a client tries to associate, hw will keep | |
1761 | * track of the tx antenna to be used for this client | |
1762 | * automaticaly, based on ACKed packets. | |
1763 | * | |
1764 | * Note: AP still listens and transmits RTS on the | |
1765 | * default antenna which is supposed to be an omni. | |
1766 | * | |
1767 | * Note2: On sectored scenarios it's possible to have | |
a180a130 BC |
1768 | * multiple antennas (1 omni -- the default -- and 14 |
1769 | * sectors), so if we choose to actually support this | |
1770 | * mode, we need to allow the user to set how many antennas | |
1771 | * we have and tweak the code below to send beacons | |
1772 | * on all of them. | |
2bed03eb NK |
1773 | */ |
1774 | if (ah->ah_ant_mode == AR5K_ANTMODE_SECTOR_AP) | |
1775 | antenna = sc->bsent & 4 ? 2 : 1; | |
1776 | ||
fa1c114f | 1777 | |
8f655dde NK |
1778 | /* FIXME: If we are in g mode and rate is a CCK rate |
1779 | * subtract ah->ah_txpower.txp_cck_ofdm_pwr_delta | |
1780 | * from tx power (value is in dB units already) */ | |
fa1c114f | 1781 | ds->ds_data = bf->skbaddr; |
281c56dd | 1782 | ret = ah->ah_setup_tx_desc(ah, ds, skb->len, |
8127fbdc | 1783 | ieee80211_get_hdrlen_from_skb(skb), padsize, |
400ec45a | 1784 | AR5K_PKT_TYPE_BEACON, (sc->power_level * 2), |
e039fa4a | 1785 | ieee80211_get_tx_rate(sc->hw, info)->hw_value, |
2e92e6f2 | 1786 | 1, AR5K_TXKEYIX_INVALID, |
400ec45a | 1787 | antenna, flags, 0, 0); |
fa1c114f JS |
1788 | if (ret) |
1789 | goto err_unmap; | |
1790 | ||
1791 | return 0; | |
1792 | err_unmap: | |
aeae4ac9 | 1793 | dma_unmap_single(sc->dev, bf->skbaddr, skb->len, DMA_TO_DEVICE); |
fa1c114f JS |
1794 | return ret; |
1795 | } | |
1796 | ||
8a63facc BC |
1797 | /* |
1798 | * Updates the beacon that is sent by ath5k_beacon_send. For adhoc, | |
1799 | * this is called only once at config_bss time, for AP we do it every | |
1800 | * SWBA interrupt so that the TIM will reflect buffered frames. | |
1801 | * | |
1802 | * Called with the beacon lock. | |
1803 | */ | |
1804 | static int | |
1805 | ath5k_beacon_update(struct ieee80211_hw *hw, struct ieee80211_vif *vif) | |
1806 | { | |
1807 | int ret; | |
1808 | struct ath5k_softc *sc = hw->priv; | |
b1ae1edf | 1809 | struct ath5k_vif *avf = (void *)vif->drv_priv; |
8a63facc BC |
1810 | struct sk_buff *skb; |
1811 | ||
1812 | if (WARN_ON(!vif)) { | |
1813 | ret = -EINVAL; | |
1814 | goto out; | |
1815 | } | |
1816 | ||
1817 | skb = ieee80211_beacon_get(hw, vif); | |
1818 | ||
1819 | if (!skb) { | |
1820 | ret = -ENOMEM; | |
1821 | goto out; | |
1822 | } | |
1823 | ||
1824 | ath5k_debug_dump_skb(sc, skb, "BC ", 1); | |
1825 | ||
b1ae1edf BG |
1826 | ath5k_txbuf_free_skb(sc, avf->bbuf); |
1827 | avf->bbuf->skb = skb; | |
1828 | ret = ath5k_beacon_setup(sc, avf->bbuf); | |
8a63facc | 1829 | if (ret) |
b1ae1edf | 1830 | avf->bbuf->skb = NULL; |
8a63facc BC |
1831 | out: |
1832 | return ret; | |
1833 | } | |
1834 | ||
fa1c114f JS |
1835 | /* |
1836 | * Transmit a beacon frame at SWBA. Dynamic updates to the | |
1837 | * frame contents are done as needed and the slot time is | |
1838 | * also adjusted based on current state. | |
1839 | * | |
5faaff74 BC |
1840 | * This is called from software irq context (beacontq tasklets) |
1841 | * or user context from ath5k_beacon_config. | |
fa1c114f JS |
1842 | */ |
1843 | static void | |
1844 | ath5k_beacon_send(struct ath5k_softc *sc) | |
1845 | { | |
fa1c114f | 1846 | struct ath5k_hw *ah = sc->ah; |
b1ae1edf BG |
1847 | struct ieee80211_vif *vif; |
1848 | struct ath5k_vif *avf; | |
1849 | struct ath5k_buf *bf; | |
cec8db23 | 1850 | struct sk_buff *skb; |
fa1c114f | 1851 | |
be9b7259 | 1852 | ATH5K_DBG_UNLIMIT(sc, ATH5K_DEBUG_BEACON, "in beacon_send\n"); |
fa1c114f | 1853 | |
fa1c114f JS |
1854 | /* |
1855 | * Check if the previous beacon has gone out. If | |
a180a130 | 1856 | * not, don't don't try to post another: skip this |
fa1c114f JS |
1857 | * period and wait for the next. Missed beacons |
1858 | * indicate a problem and should not occur. If we | |
1859 | * miss too many consecutive beacons reset the device. | |
1860 | */ | |
1861 | if (unlikely(ath5k_hw_num_tx_pending(ah, sc->bhalq) != 0)) { | |
1862 | sc->bmisscount++; | |
be9b7259 | 1863 | ATH5K_DBG(sc, ATH5K_DEBUG_BEACON, |
fa1c114f | 1864 | "missed %u consecutive beacons\n", sc->bmisscount); |
428cbd4f | 1865 | if (sc->bmisscount > 10) { /* NB: 10 is a guess */ |
be9b7259 | 1866 | ATH5K_DBG(sc, ATH5K_DEBUG_BEACON, |
fa1c114f JS |
1867 | "stuck beacon time (%u missed)\n", |
1868 | sc->bmisscount); | |
8d67a031 BR |
1869 | ATH5K_DBG(sc, ATH5K_DEBUG_RESET, |
1870 | "stuck beacon, resetting\n"); | |
5faaff74 | 1871 | ieee80211_queue_work(sc->hw, &sc->reset_work); |
fa1c114f JS |
1872 | } |
1873 | return; | |
1874 | } | |
1875 | if (unlikely(sc->bmisscount != 0)) { | |
be9b7259 | 1876 | ATH5K_DBG(sc, ATH5K_DEBUG_BEACON, |
fa1c114f JS |
1877 | "resume beacon xmit after %u misses\n", |
1878 | sc->bmisscount); | |
1879 | sc->bmisscount = 0; | |
1880 | } | |
1881 | ||
b93996cf JC |
1882 | if ((sc->opmode == NL80211_IFTYPE_AP && sc->num_ap_vifs > 1) || |
1883 | sc->opmode == NL80211_IFTYPE_MESH_POINT) { | |
b1ae1edf BG |
1884 | u64 tsf = ath5k_hw_get_tsf64(ah); |
1885 | u32 tsftu = TSF_TO_TU(tsf); | |
1886 | int slot = ((tsftu % sc->bintval) * ATH_BCBUF) / sc->bintval; | |
1887 | vif = sc->bslot[(slot + 1) % ATH_BCBUF]; | |
1888 | ATH5K_DBG(sc, ATH5K_DEBUG_BEACON, | |
1889 | "tsf %llx tsftu %x intval %u slot %u vif %p\n", | |
1890 | (unsigned long long)tsf, tsftu, sc->bintval, slot, vif); | |
1891 | } else /* only one interface */ | |
1892 | vif = sc->bslot[0]; | |
1893 | ||
1894 | if (!vif) | |
1895 | return; | |
1896 | ||
1897 | avf = (void *)vif->drv_priv; | |
1898 | bf = avf->bbuf; | |
1899 | if (unlikely(bf->skb == NULL || sc->opmode == NL80211_IFTYPE_STATION || | |
1900 | sc->opmode == NL80211_IFTYPE_MONITOR)) { | |
1901 | ATH5K_WARN(sc, "bf=%p bf_skb=%p\n", bf, bf ? bf->skb : NULL); | |
1902 | return; | |
1903 | } | |
1904 | ||
fa1c114f JS |
1905 | /* |
1906 | * Stop any current dma and put the new frame on the queue. | |
1907 | * This should never fail since we check above that no frames | |
1908 | * are still pending on the queue. | |
1909 | */ | |
14fae2d4 | 1910 | if (unlikely(ath5k_hw_stop_beacon_queue(ah, sc->bhalq))) { |
428cbd4f | 1911 | ATH5K_WARN(sc, "beacon queue %u didn't start/stop ?\n", sc->bhalq); |
fa1c114f JS |
1912 | /* NB: hw still stops DMA, so proceed */ |
1913 | } | |
fa1c114f | 1914 | |
d82b577b JC |
1915 | /* refresh the beacon for AP or MESH mode */ |
1916 | if (sc->opmode == NL80211_IFTYPE_AP || | |
1917 | sc->opmode == NL80211_IFTYPE_MESH_POINT) | |
b1ae1edf | 1918 | ath5k_beacon_update(sc->hw, vif); |
1071db86 | 1919 | |
c6e387a2 NK |
1920 | ath5k_hw_set_txdp(ah, sc->bhalq, bf->daddr); |
1921 | ath5k_hw_start_tx_dma(ah, sc->bhalq); | |
be9b7259 | 1922 | ATH5K_DBG(sc, ATH5K_DEBUG_BEACON, "TXDP[%u] = %llx (%p)\n", |
fa1c114f JS |
1923 | sc->bhalq, (unsigned long long)bf->daddr, bf->desc); |
1924 | ||
b1ae1edf | 1925 | skb = ieee80211_get_buffered_bc(sc->hw, vif); |
cec8db23 BC |
1926 | while (skb) { |
1927 | ath5k_tx_queue(sc->hw, skb, sc->cabq); | |
b1ae1edf | 1928 | skb = ieee80211_get_buffered_bc(sc->hw, vif); |
cec8db23 BC |
1929 | } |
1930 | ||
fa1c114f JS |
1931 | sc->bsent++; |
1932 | } | |
1933 | ||
9804b98d BR |
1934 | /** |
1935 | * ath5k_beacon_update_timers - update beacon timers | |
1936 | * | |
1937 | * @sc: struct ath5k_softc pointer we are operating on | |
1938 | * @bc_tsf: the timestamp of the beacon. 0 to reset the TSF. -1 to perform a | |
1939 | * beacon timer update based on the current HW TSF. | |
1940 | * | |
1941 | * Calculate the next target beacon transmit time (TBTT) based on the timestamp | |
1942 | * of a received beacon or the current local hardware TSF and write it to the | |
1943 | * beacon timer registers. | |
1944 | * | |
1945 | * This is called in a variety of situations, e.g. when a beacon is received, | |
6ba81c2c | 1946 | * when a TSF update has been detected, but also when an new IBSS is created or |
9804b98d BR |
1947 | * when we otherwise know we have to update the timers, but we keep it in this |
1948 | * function to have it all together in one place. | |
1949 | */ | |
fa1c114f | 1950 | static void |
9804b98d | 1951 | ath5k_beacon_update_timers(struct ath5k_softc *sc, u64 bc_tsf) |
fa1c114f JS |
1952 | { |
1953 | struct ath5k_hw *ah = sc->ah; | |
9804b98d BR |
1954 | u32 nexttbtt, intval, hw_tu, bc_tu; |
1955 | u64 hw_tsf; | |
fa1c114f JS |
1956 | |
1957 | intval = sc->bintval & AR5K_BEACON_PERIOD; | |
b1ae1edf BG |
1958 | if (sc->opmode == NL80211_IFTYPE_AP && sc->num_ap_vifs > 1) { |
1959 | intval /= ATH_BCBUF; /* staggered multi-bss beacons */ | |
1960 | if (intval < 15) | |
1961 | ATH5K_WARN(sc, "intval %u is too low, min 15\n", | |
1962 | intval); | |
1963 | } | |
fa1c114f JS |
1964 | if (WARN_ON(!intval)) |
1965 | return; | |
1966 | ||
9804b98d BR |
1967 | /* beacon TSF converted to TU */ |
1968 | bc_tu = TSF_TO_TU(bc_tsf); | |
fa1c114f | 1969 | |
9804b98d BR |
1970 | /* current TSF converted to TU */ |
1971 | hw_tsf = ath5k_hw_get_tsf64(ah); | |
1972 | hw_tu = TSF_TO_TU(hw_tsf); | |
fa1c114f | 1973 | |
11f21df3 BR |
1974 | #define FUDGE AR5K_TUNE_SW_BEACON_RESP + 3 |
1975 | /* We use FUDGE to make sure the next TBTT is ahead of the current TU. | |
1976 | * Since we later substract AR5K_TUNE_SW_BEACON_RESP (10) in the timer | |
1977 | * configuration we need to make sure it is bigger than that. */ | |
1978 | ||
9804b98d BR |
1979 | if (bc_tsf == -1) { |
1980 | /* | |
1981 | * no beacons received, called internally. | |
1982 | * just need to refresh timers based on HW TSF. | |
1983 | */ | |
1984 | nexttbtt = roundup(hw_tu + FUDGE, intval); | |
1985 | } else if (bc_tsf == 0) { | |
1986 | /* | |
1987 | * no beacon received, probably called by ath5k_reset_tsf(). | |
1988 | * reset TSF to start with 0. | |
1989 | */ | |
1990 | nexttbtt = intval; | |
1991 | intval |= AR5K_BEACON_RESET_TSF; | |
1992 | } else if (bc_tsf > hw_tsf) { | |
1993 | /* | |
1994 | * beacon received, SW merge happend but HW TSF not yet updated. | |
1995 | * not possible to reconfigure timers yet, but next time we | |
1996 | * receive a beacon with the same BSSID, the hardware will | |
1997 | * automatically update the TSF and then we need to reconfigure | |
1998 | * the timers. | |
1999 | */ | |
2000 | ATH5K_DBG_UNLIMIT(sc, ATH5K_DEBUG_BEACON, | |
2001 | "need to wait for HW TSF sync\n"); | |
2002 | return; | |
2003 | } else { | |
2004 | /* | |
2005 | * most important case for beacon synchronization between STA. | |
2006 | * | |
2007 | * beacon received and HW TSF has been already updated by HW. | |
2008 | * update next TBTT based on the TSF of the beacon, but make | |
2009 | * sure it is ahead of our local TSF timer. | |
2010 | */ | |
2011 | nexttbtt = bc_tu + roundup(hw_tu + FUDGE - bc_tu, intval); | |
2012 | } | |
2013 | #undef FUDGE | |
fa1c114f | 2014 | |
036cd1ec BR |
2015 | sc->nexttbtt = nexttbtt; |
2016 | ||
fa1c114f | 2017 | intval |= AR5K_BEACON_ENA; |
fa1c114f | 2018 | ath5k_hw_init_beacon(ah, nexttbtt, intval); |
9804b98d BR |
2019 | |
2020 | /* | |
2021 | * debugging output last in order to preserve the time critical aspect | |
2022 | * of this function | |
2023 | */ | |
2024 | if (bc_tsf == -1) | |
2025 | ATH5K_DBG_UNLIMIT(sc, ATH5K_DEBUG_BEACON, | |
2026 | "reconfigured timers based on HW TSF\n"); | |
2027 | else if (bc_tsf == 0) | |
2028 | ATH5K_DBG_UNLIMIT(sc, ATH5K_DEBUG_BEACON, | |
2029 | "reset HW TSF and timers\n"); | |
2030 | else | |
2031 | ATH5K_DBG_UNLIMIT(sc, ATH5K_DEBUG_BEACON, | |
2032 | "updated timers based on beacon TSF\n"); | |
2033 | ||
2034 | ATH5K_DBG_UNLIMIT(sc, ATH5K_DEBUG_BEACON, | |
04f93a87 DM |
2035 | "bc_tsf %llx hw_tsf %llx bc_tu %u hw_tu %u nexttbtt %u\n", |
2036 | (unsigned long long) bc_tsf, | |
2037 | (unsigned long long) hw_tsf, bc_tu, hw_tu, nexttbtt); | |
9804b98d BR |
2038 | ATH5K_DBG_UNLIMIT(sc, ATH5K_DEBUG_BEACON, "intval %u %s %s\n", |
2039 | intval & AR5K_BEACON_PERIOD, | |
2040 | intval & AR5K_BEACON_ENA ? "AR5K_BEACON_ENA" : "", | |
2041 | intval & AR5K_BEACON_RESET_TSF ? "AR5K_BEACON_RESET_TSF" : ""); | |
fa1c114f JS |
2042 | } |
2043 | ||
036cd1ec BR |
2044 | /** |
2045 | * ath5k_beacon_config - Configure the beacon queues and interrupts | |
2046 | * | |
2047 | * @sc: struct ath5k_softc pointer we are operating on | |
fa1c114f | 2048 | * |
036cd1ec | 2049 | * In IBSS mode we use a self-linked tx descriptor if possible. We enable SWBA |
6ba81c2c | 2050 | * interrupts to detect TSF updates only. |
fa1c114f JS |
2051 | */ |
2052 | static void | |
2053 | ath5k_beacon_config(struct ath5k_softc *sc) | |
2054 | { | |
2055 | struct ath5k_hw *ah = sc->ah; | |
b5f03956 | 2056 | unsigned long flags; |
fa1c114f | 2057 | |
21800491 | 2058 | spin_lock_irqsave(&sc->block, flags); |
fa1c114f | 2059 | sc->bmisscount = 0; |
dc1968e7 | 2060 | sc->imask &= ~(AR5K_INT_BMISS | AR5K_INT_SWBA); |
fa1c114f | 2061 | |
21800491 | 2062 | if (sc->enable_beacon) { |
fa1c114f | 2063 | /* |
036cd1ec BR |
2064 | * In IBSS mode we use a self-linked tx descriptor and let the |
2065 | * hardware send the beacons automatically. We have to load it | |
fa1c114f | 2066 | * only once here. |
036cd1ec | 2067 | * We use the SWBA interrupt only to keep track of the beacon |
6ba81c2c | 2068 | * timers in order to detect automatic TSF updates. |
fa1c114f JS |
2069 | */ |
2070 | ath5k_beaconq_config(sc); | |
fa1c114f | 2071 | |
036cd1ec BR |
2072 | sc->imask |= AR5K_INT_SWBA; |
2073 | ||
da966bca | 2074 | if (sc->opmode == NL80211_IFTYPE_ADHOC) { |
21800491 | 2075 | if (ath5k_hw_hasveol(ah)) |
da966bca | 2076 | ath5k_beacon_send(sc); |
da966bca JS |
2077 | } else |
2078 | ath5k_beacon_update_timers(sc, -1); | |
21800491 | 2079 | } else { |
14fae2d4 | 2080 | ath5k_hw_stop_beacon_queue(sc->ah, sc->bhalq); |
fa1c114f | 2081 | } |
fa1c114f | 2082 | |
c6e387a2 | 2083 | ath5k_hw_set_imr(ah, sc->imask); |
21800491 BC |
2084 | mmiowb(); |
2085 | spin_unlock_irqrestore(&sc->block, flags); | |
fa1c114f JS |
2086 | } |
2087 | ||
428cbd4f NK |
2088 | static void ath5k_tasklet_beacon(unsigned long data) |
2089 | { | |
2090 | struct ath5k_softc *sc = (struct ath5k_softc *) data; | |
2091 | ||
2092 | /* | |
2093 | * Software beacon alert--time to send a beacon. | |
2094 | * | |
2095 | * In IBSS mode we use this interrupt just to | |
2096 | * keep track of the next TBTT (target beacon | |
2097 | * transmission time) in order to detect wether | |
2098 | * automatic TSF updates happened. | |
2099 | */ | |
2100 | if (sc->opmode == NL80211_IFTYPE_ADHOC) { | |
2101 | /* XXX: only if VEOL suppported */ | |
2102 | u64 tsf = ath5k_hw_get_tsf64(sc->ah); | |
2103 | sc->nexttbtt += sc->bintval; | |
2104 | ATH5K_DBG(sc, ATH5K_DEBUG_BEACON, | |
2105 | "SWBA nexttbtt: %x hw_tu: %x " | |
2106 | "TSF: %llx\n", | |
2107 | sc->nexttbtt, | |
2108 | TSF_TO_TU(tsf), | |
2109 | (unsigned long long) tsf); | |
2110 | } else { | |
2111 | spin_lock(&sc->block); | |
2112 | ath5k_beacon_send(sc); | |
2113 | spin_unlock(&sc->block); | |
2114 | } | |
2115 | } | |
2116 | ||
fa1c114f JS |
2117 | |
2118 | /********************\ | |
2119 | * Interrupt handling * | |
2120 | \********************/ | |
2121 | ||
6a8a3f6b BR |
2122 | static void |
2123 | ath5k_intr_calibration_poll(struct ath5k_hw *ah) | |
2124 | { | |
2111ac0d BR |
2125 | if (time_is_before_eq_jiffies(ah->ah_cal_next_ani) && |
2126 | !(ah->ah_cal_mask & AR5K_CALIBRATION_FULL)) { | |
2127 | /* run ANI only when full calibration is not active */ | |
2128 | ah->ah_cal_next_ani = jiffies + | |
2129 | msecs_to_jiffies(ATH5K_TUNE_CALIBRATION_INTERVAL_ANI); | |
2130 | tasklet_schedule(&ah->ah_sc->ani_tasklet); | |
2131 | ||
2132 | } else if (time_is_before_eq_jiffies(ah->ah_cal_next_full)) { | |
6a8a3f6b BR |
2133 | ah->ah_cal_next_full = jiffies + |
2134 | msecs_to_jiffies(ATH5K_TUNE_CALIBRATION_INTERVAL_FULL); | |
2135 | tasklet_schedule(&ah->ah_sc->calib); | |
2136 | } | |
2137 | /* we could use SWI to generate enough interrupts to meet our | |
2138 | * calibration interval requirements, if necessary: | |
2139 | * AR5K_REG_ENABLE_BITS(ah, AR5K_CR, AR5K_CR_SWI); */ | |
2140 | } | |
2141 | ||
132b1c3e | 2142 | irqreturn_t |
fa1c114f JS |
2143 | ath5k_intr(int irq, void *dev_id) |
2144 | { | |
2145 | struct ath5k_softc *sc = dev_id; | |
2146 | struct ath5k_hw *ah = sc->ah; | |
2147 | enum ath5k_int status; | |
2148 | unsigned int counter = 1000; | |
2149 | ||
2150 | if (unlikely(test_bit(ATH_STAT_INVALID, sc->status) || | |
4cebb34c FF |
2151 | ((ath5k_get_bus_type(ah) != ATH_AHB) && |
2152 | !ath5k_hw_is_intr_pending(ah)))) | |
fa1c114f JS |
2153 | return IRQ_NONE; |
2154 | ||
2155 | do { | |
fa1c114f JS |
2156 | ath5k_hw_get_isr(ah, &status); /* NB: clears IRQ too */ |
2157 | ATH5K_DBG(sc, ATH5K_DEBUG_INTR, "status 0x%x/0x%x\n", | |
2158 | status, sc->imask); | |
fa1c114f JS |
2159 | if (unlikely(status & AR5K_INT_FATAL)) { |
2160 | /* | |
2161 | * Fatal errors are unrecoverable. | |
2162 | * Typically these are caused by DMA errors. | |
2163 | */ | |
8d67a031 BR |
2164 | ATH5K_DBG(sc, ATH5K_DEBUG_RESET, |
2165 | "fatal int, resetting\n"); | |
5faaff74 | 2166 | ieee80211_queue_work(sc->hw, &sc->reset_work); |
fa1c114f | 2167 | } else if (unlikely(status & AR5K_INT_RXORN)) { |
87d77c4e BR |
2168 | /* |
2169 | * Receive buffers are full. Either the bus is busy or | |
2170 | * the CPU is not fast enough to process all received | |
2171 | * frames. | |
2172 | * Older chipsets need a reset to come out of this | |
2173 | * condition, but we treat it as RX for newer chips. | |
2174 | * We don't know exactly which versions need a reset - | |
2175 | * this guess is copied from the HAL. | |
2176 | */ | |
2177 | sc->stats.rxorn_intr++; | |
8d67a031 BR |
2178 | if (ah->ah_mac_srev < AR5K_SREV_AR5212) { |
2179 | ATH5K_DBG(sc, ATH5K_DEBUG_RESET, | |
2180 | "rx overrun, resetting\n"); | |
5faaff74 | 2181 | ieee80211_queue_work(sc->hw, &sc->reset_work); |
8d67a031 | 2182 | } |
87d77c4e BR |
2183 | else |
2184 | tasklet_schedule(&sc->rxtq); | |
fa1c114f JS |
2185 | } else { |
2186 | if (status & AR5K_INT_SWBA) { | |
56d2ac76 | 2187 | tasklet_hi_schedule(&sc->beacontq); |
fa1c114f JS |
2188 | } |
2189 | if (status & AR5K_INT_RXEOL) { | |
2190 | /* | |
2191 | * NB: the hardware should re-read the link when | |
2192 | * RXE bit is written, but it doesn't work at | |
2193 | * least on older hardware revs. | |
2194 | */ | |
b3f194e5 | 2195 | sc->stats.rxeol_intr++; |
fa1c114f JS |
2196 | } |
2197 | if (status & AR5K_INT_TXURN) { | |
2198 | /* bump tx trigger level */ | |
2199 | ath5k_hw_update_tx_triglevel(ah, true); | |
2200 | } | |
4c674c60 | 2201 | if (status & (AR5K_INT_RXOK | AR5K_INT_RXERR)) |
fa1c114f | 2202 | tasklet_schedule(&sc->rxtq); |
4c674c60 NK |
2203 | if (status & (AR5K_INT_TXOK | AR5K_INT_TXDESC |
2204 | | AR5K_INT_TXERR | AR5K_INT_TXEOL)) | |
fa1c114f JS |
2205 | tasklet_schedule(&sc->txtq); |
2206 | if (status & AR5K_INT_BMISS) { | |
1e3e6e8f | 2207 | /* TODO */ |
fa1c114f JS |
2208 | } |
2209 | if (status & AR5K_INT_MIB) { | |
2111ac0d | 2210 | sc->stats.mib_intr++; |
495391d7 | 2211 | ath5k_hw_update_mib_counters(ah); |
2111ac0d | 2212 | ath5k_ani_mib_intr(ah); |
fa1c114f | 2213 | } |
e6a3b616 | 2214 | if (status & AR5K_INT_GPIO) |
e6a3b616 | 2215 | tasklet_schedule(&sc->rf_kill.toggleq); |
a6ae0716 | 2216 | |
fa1c114f | 2217 | } |
4cebb34c FF |
2218 | |
2219 | if (ath5k_get_bus_type(ah) == ATH_AHB) | |
2220 | break; | |
2221 | ||
2516baa6 | 2222 | } while (ath5k_hw_is_intr_pending(ah) && --counter > 0); |
fa1c114f JS |
2223 | |
2224 | if (unlikely(!counter)) | |
2225 | ATH5K_WARN(sc, "too many interrupts, giving up for now\n"); | |
2226 | ||
6a8a3f6b | 2227 | ath5k_intr_calibration_poll(ah); |
6e220662 | 2228 | |
fa1c114f JS |
2229 | return IRQ_HANDLED; |
2230 | } | |
2231 | ||
fa1c114f JS |
2232 | /* |
2233 | * Periodically recalibrate the PHY to account | |
2234 | * for temperature/environment changes. | |
2235 | */ | |
2236 | static void | |
6e220662 | 2237 | ath5k_tasklet_calibrate(unsigned long data) |
fa1c114f JS |
2238 | { |
2239 | struct ath5k_softc *sc = (void *)data; | |
2240 | struct ath5k_hw *ah = sc->ah; | |
2241 | ||
6e220662 | 2242 | /* Only full calibration for now */ |
e65e1d77 | 2243 | ah->ah_cal_mask |= AR5K_CALIBRATION_FULL; |
6e220662 | 2244 | |
fa1c114f | 2245 | ATH5K_DBG(sc, ATH5K_DEBUG_CALIBRATE, "channel %u/%x\n", |
400ec45a LR |
2246 | ieee80211_frequency_to_channel(sc->curchan->center_freq), |
2247 | sc->curchan->hw_value); | |
fa1c114f | 2248 | |
6f3b414a | 2249 | if (ath5k_hw_gainf_calibrate(ah) == AR5K_RFGAIN_NEED_CHANGE) { |
fa1c114f JS |
2250 | /* |
2251 | * Rfgain is out of bounds, reset the chip | |
2252 | * to load new gain values. | |
2253 | */ | |
2254 | ATH5K_DBG(sc, ATH5K_DEBUG_RESET, "calibration, resetting\n"); | |
5faaff74 | 2255 | ieee80211_queue_work(sc->hw, &sc->reset_work); |
fa1c114f JS |
2256 | } |
2257 | if (ath5k_hw_phy_calibrate(ah, sc->curchan)) | |
2258 | ATH5K_ERR(sc, "calibration of channel %u failed\n", | |
400ec45a LR |
2259 | ieee80211_frequency_to_channel( |
2260 | sc->curchan->center_freq)); | |
fa1c114f | 2261 | |
0e8e02dd | 2262 | /* Noise floor calibration interrupts rx/tx path while I/Q calibration |
651d9375 BR |
2263 | * doesn't. |
2264 | * TODO: We should stop TX here, so that it doesn't interfere. | |
2265 | * Note that stopping the queues is not enough to stop TX! */ | |
afe86286 BR |
2266 | if (time_is_before_eq_jiffies(ah->ah_cal_next_nf)) { |
2267 | ah->ah_cal_next_nf = jiffies + | |
2268 | msecs_to_jiffies(ATH5K_TUNE_CALIBRATION_INTERVAL_NF); | |
afe86286 | 2269 | ath5k_hw_update_noise_floor(ah); |
afe86286 | 2270 | } |
6e220662 | 2271 | |
e65e1d77 | 2272 | ah->ah_cal_mask &= ~AR5K_CALIBRATION_FULL; |
fa1c114f JS |
2273 | } |
2274 | ||
2275 | ||
2111ac0d BR |
2276 | static void |
2277 | ath5k_tasklet_ani(unsigned long data) | |
2278 | { | |
2279 | struct ath5k_softc *sc = (void *)data; | |
2280 | struct ath5k_hw *ah = sc->ah; | |
2281 | ||
2282 | ah->ah_cal_mask |= AR5K_CALIBRATION_ANI; | |
2283 | ath5k_ani_calibration(ah); | |
2284 | ah->ah_cal_mask &= ~AR5K_CALIBRATION_ANI; | |
fa1c114f JS |
2285 | } |
2286 | ||
2287 | ||
4edd761f BR |
2288 | static void |
2289 | ath5k_tx_complete_poll_work(struct work_struct *work) | |
2290 | { | |
2291 | struct ath5k_softc *sc = container_of(work, struct ath5k_softc, | |
2292 | tx_complete_work.work); | |
2293 | struct ath5k_txq *txq; | |
2294 | int i; | |
2295 | bool needreset = false; | |
2296 | ||
2297 | for (i = 0; i < ARRAY_SIZE(sc->txqs); i++) { | |
2298 | if (sc->txqs[i].setup) { | |
2299 | txq = &sc->txqs[i]; | |
2300 | spin_lock_bh(&txq->lock); | |
23413296 | 2301 | if (txq->txq_len > 1) { |
4edd761f BR |
2302 | if (txq->txq_poll_mark) { |
2303 | ATH5K_DBG(sc, ATH5K_DEBUG_XMIT, | |
2304 | "TX queue stuck %d\n", | |
2305 | txq->qnum); | |
2306 | needreset = true; | |
923e5b3d | 2307 | txq->txq_stuck++; |
4edd761f BR |
2308 | spin_unlock_bh(&txq->lock); |
2309 | break; | |
2310 | } else { | |
2311 | txq->txq_poll_mark = true; | |
2312 | } | |
2313 | } | |
2314 | spin_unlock_bh(&txq->lock); | |
2315 | } | |
2316 | } | |
2317 | ||
2318 | if (needreset) { | |
2319 | ATH5K_DBG(sc, ATH5K_DEBUG_RESET, | |
2320 | "TX queues stuck, resetting\n"); | |
8aec7af9 | 2321 | ath5k_reset(sc, NULL, true); |
4edd761f BR |
2322 | } |
2323 | ||
2324 | ieee80211_queue_delayed_work(sc->hw, &sc->tx_complete_work, | |
2325 | msecs_to_jiffies(ATH5K_TX_COMPLETE_POLL_INT)); | |
2326 | } | |
2327 | ||
2328 | ||
8a63facc BC |
2329 | /*************************\ |
2330 | * Initialization routines * | |
2331 | \*************************/ | |
fa1c114f | 2332 | |
132b1c3e FF |
2333 | int |
2334 | ath5k_init_softc(struct ath5k_softc *sc, const struct ath_bus_ops *bus_ops) | |
2335 | { | |
2336 | struct ieee80211_hw *hw = sc->hw; | |
2337 | struct ath_common *common; | |
2338 | int ret; | |
2339 | int csz; | |
2340 | ||
2341 | /* Initialize driver private data */ | |
2342 | SET_IEEE80211_DEV(hw, sc->dev); | |
2343 | hw->flags = IEEE80211_HW_RX_INCLUDES_FCS | | |
b9e61f11 NK |
2344 | IEEE80211_HW_HOST_BROADCAST_PS_BUFFERING | |
2345 | IEEE80211_HW_SIGNAL_DBM | | |
2346 | IEEE80211_HW_REPORTS_TX_ACK_STATUS; | |
132b1c3e FF |
2347 | |
2348 | hw->wiphy->interface_modes = | |
2349 | BIT(NL80211_IFTYPE_AP) | | |
2350 | BIT(NL80211_IFTYPE_STATION) | | |
2351 | BIT(NL80211_IFTYPE_ADHOC) | | |
2352 | BIT(NL80211_IFTYPE_MESH_POINT); | |
2353 | ||
2354 | hw->extra_tx_headroom = 2; | |
2355 | hw->channel_change_time = 5000; | |
2356 | ||
2357 | /* | |
2358 | * Mark the device as detached to avoid processing | |
2359 | * interrupts until setup is complete. | |
2360 | */ | |
2361 | __set_bit(ATH_STAT_INVALID, sc->status); | |
2362 | ||
2363 | sc->opmode = NL80211_IFTYPE_STATION; | |
2364 | sc->bintval = 1000; | |
2365 | mutex_init(&sc->lock); | |
2366 | spin_lock_init(&sc->rxbuflock); | |
2367 | spin_lock_init(&sc->txbuflock); | |
2368 | spin_lock_init(&sc->block); | |
2369 | ||
2370 | ||
2371 | /* Setup interrupt handler */ | |
2372 | ret = request_irq(sc->irq, ath5k_intr, IRQF_SHARED, "ath", sc); | |
2373 | if (ret) { | |
2374 | ATH5K_ERR(sc, "request_irq failed\n"); | |
2375 | goto err; | |
2376 | } | |
2377 | ||
2378 | /* If we passed the test, malloc an ath5k_hw struct */ | |
2379 | sc->ah = kzalloc(sizeof(struct ath5k_hw), GFP_KERNEL); | |
2380 | if (!sc->ah) { | |
2381 | ret = -ENOMEM; | |
2382 | ATH5K_ERR(sc, "out of memory\n"); | |
2383 | goto err_irq; | |
2384 | } | |
2385 | ||
2386 | sc->ah->ah_sc = sc; | |
2387 | sc->ah->ah_iobase = sc->iobase; | |
2388 | common = ath5k_hw_common(sc->ah); | |
2389 | common->ops = &ath5k_common_ops; | |
2390 | common->bus_ops = bus_ops; | |
2391 | common->ah = sc->ah; | |
2392 | common->hw = hw; | |
2393 | common->priv = sc; | |
2394 | ||
2395 | /* | |
2396 | * Cache line size is used to size and align various | |
2397 | * structures used to communicate with the hardware. | |
2398 | */ | |
2399 | ath5k_read_cachesize(common, &csz); | |
2400 | common->cachelsz = csz << 2; /* convert to bytes */ | |
2401 | ||
2402 | spin_lock_init(&common->cc_lock); | |
2403 | ||
2404 | /* Initialize device */ | |
2405 | ret = ath5k_hw_init(sc); | |
2406 | if (ret) | |
2407 | goto err_free_ah; | |
2408 | ||
2409 | /* set up multi-rate retry capabilities */ | |
2410 | if (sc->ah->ah_version == AR5K_AR5212) { | |
2411 | hw->max_rates = 4; | |
2412 | hw->max_rate_tries = 11; | |
2413 | } | |
2414 | ||
2415 | hw->vif_data_size = sizeof(struct ath5k_vif); | |
2416 | ||
2417 | /* Finish private driver data initialization */ | |
2418 | ret = ath5k_init(hw); | |
2419 | if (ret) | |
2420 | goto err_ah; | |
2421 | ||
2422 | ATH5K_INFO(sc, "Atheros AR%s chip found (MAC: 0x%x, PHY: 0x%x)\n", | |
2423 | ath5k_chip_name(AR5K_VERSION_MAC, sc->ah->ah_mac_srev), | |
2424 | sc->ah->ah_mac_srev, | |
2425 | sc->ah->ah_phy_revision); | |
2426 | ||
2427 | if (!sc->ah->ah_single_chip) { | |
2428 | /* Single chip radio (!RF5111) */ | |
2429 | if (sc->ah->ah_radio_5ghz_revision && | |
2430 | !sc->ah->ah_radio_2ghz_revision) { | |
2431 | /* No 5GHz support -> report 2GHz radio */ | |
2432 | if (!test_bit(AR5K_MODE_11A, | |
2433 | sc->ah->ah_capabilities.cap_mode)) { | |
2434 | ATH5K_INFO(sc, "RF%s 2GHz radio found (0x%x)\n", | |
2435 | ath5k_chip_name(AR5K_VERSION_RAD, | |
2436 | sc->ah->ah_radio_5ghz_revision), | |
2437 | sc->ah->ah_radio_5ghz_revision); | |
2438 | /* No 2GHz support (5110 and some | |
2439 | * 5Ghz only cards) -> report 5Ghz radio */ | |
2440 | } else if (!test_bit(AR5K_MODE_11B, | |
2441 | sc->ah->ah_capabilities.cap_mode)) { | |
2442 | ATH5K_INFO(sc, "RF%s 5GHz radio found (0x%x)\n", | |
2443 | ath5k_chip_name(AR5K_VERSION_RAD, | |
2444 | sc->ah->ah_radio_5ghz_revision), | |
2445 | sc->ah->ah_radio_5ghz_revision); | |
2446 | /* Multiband radio */ | |
2447 | } else { | |
2448 | ATH5K_INFO(sc, "RF%s multiband radio found" | |
2449 | " (0x%x)\n", | |
2450 | ath5k_chip_name(AR5K_VERSION_RAD, | |
2451 | sc->ah->ah_radio_5ghz_revision), | |
2452 | sc->ah->ah_radio_5ghz_revision); | |
2453 | } | |
2454 | } | |
2455 | /* Multi chip radio (RF5111 - RF2111) -> | |
2456 | * report both 2GHz/5GHz radios */ | |
2457 | else if (sc->ah->ah_radio_5ghz_revision && | |
2458 | sc->ah->ah_radio_2ghz_revision){ | |
2459 | ATH5K_INFO(sc, "RF%s 5GHz radio found (0x%x)\n", | |
2460 | ath5k_chip_name(AR5K_VERSION_RAD, | |
2461 | sc->ah->ah_radio_5ghz_revision), | |
2462 | sc->ah->ah_radio_5ghz_revision); | |
2463 | ATH5K_INFO(sc, "RF%s 2GHz radio found (0x%x)\n", | |
2464 | ath5k_chip_name(AR5K_VERSION_RAD, | |
2465 | sc->ah->ah_radio_2ghz_revision), | |
2466 | sc->ah->ah_radio_2ghz_revision); | |
2467 | } | |
2468 | } | |
2469 | ||
2470 | ath5k_debug_init_device(sc); | |
2471 | ||
2472 | /* ready to process interrupts */ | |
2473 | __clear_bit(ATH_STAT_INVALID, sc->status); | |
2474 | ||
2475 | return 0; | |
2476 | err_ah: | |
2477 | ath5k_hw_deinit(sc->ah); | |
2478 | err_free_ah: | |
2479 | kfree(sc->ah); | |
2480 | err_irq: | |
2481 | free_irq(sc->irq, sc); | |
2482 | err: | |
2483 | return ret; | |
2484 | } | |
2485 | ||
fa1c114f | 2486 | static int |
8a63facc | 2487 | ath5k_stop_locked(struct ath5k_softc *sc) |
cec8db23 | 2488 | { |
8a63facc | 2489 | struct ath5k_hw *ah = sc->ah; |
cec8db23 | 2490 | |
8a63facc BC |
2491 | ATH5K_DBG(sc, ATH5K_DEBUG_RESET, "invalid %u\n", |
2492 | test_bit(ATH_STAT_INVALID, sc->status)); | |
2493 | ||
2494 | /* | |
2495 | * Shutdown the hardware and driver: | |
2496 | * stop output from above | |
2497 | * disable interrupts | |
2498 | * turn off timers | |
2499 | * turn off the radio | |
2500 | * clear transmit machinery | |
2501 | * clear receive machinery | |
2502 | * drain and release tx queues | |
2503 | * reclaim beacon resources | |
2504 | * power down hardware | |
2505 | * | |
2506 | * Note that some of this work is not possible if the | |
2507 | * hardware is gone (invalid). | |
2508 | */ | |
2509 | ieee80211_stop_queues(sc->hw); | |
2510 | ||
2511 | if (!test_bit(ATH_STAT_INVALID, sc->status)) { | |
2512 | ath5k_led_off(sc); | |
2513 | ath5k_hw_set_imr(ah, 0); | |
aeae4ac9 | 2514 | synchronize_irq(sc->irq); |
8a63facc | 2515 | ath5k_rx_stop(sc); |
80dac9ee NK |
2516 | ath5k_hw_dma_stop(ah); |
2517 | ath5k_drain_tx_buffs(sc); | |
8a63facc BC |
2518 | ath5k_hw_phy_disable(ah); |
2519 | } | |
2520 | ||
2521 | return 0; | |
cec8db23 BC |
2522 | } |
2523 | ||
8a63facc | 2524 | static int |
132b1c3e | 2525 | ath5k_init_hw(struct ath5k_softc *sc) |
fa1c114f | 2526 | { |
8a63facc BC |
2527 | struct ath5k_hw *ah = sc->ah; |
2528 | struct ath_common *common = ath5k_hw_common(ah); | |
2529 | int ret, i; | |
fa1c114f | 2530 | |
8a63facc BC |
2531 | mutex_lock(&sc->lock); |
2532 | ||
2533 | ATH5K_DBG(sc, ATH5K_DEBUG_RESET, "mode %d\n", sc->opmode); | |
fa1c114f | 2534 | |
fa1c114f | 2535 | /* |
8a63facc BC |
2536 | * Stop anything previously setup. This is safe |
2537 | * no matter this is the first time through or not. | |
fa1c114f | 2538 | */ |
8a63facc | 2539 | ath5k_stop_locked(sc); |
fa1c114f | 2540 | |
8a63facc BC |
2541 | /* |
2542 | * The basic interface to setting the hardware in a good | |
2543 | * state is ``reset''. On return the hardware is known to | |
2544 | * be powered up and with interrupts disabled. This must | |
2545 | * be followed by initialization of the appropriate bits | |
2546 | * and then setup of the interrupt mask. | |
2547 | */ | |
2548 | sc->curchan = sc->hw->conf.channel; | |
2549 | sc->curband = &sc->sbands[sc->curchan->band]; | |
2550 | sc->imask = AR5K_INT_RXOK | AR5K_INT_RXERR | AR5K_INT_RXEOL | | |
2551 | AR5K_INT_RXORN | AR5K_INT_TXDESC | AR5K_INT_TXEOL | | |
2552 | AR5K_INT_FATAL | AR5K_INT_GLOBAL | AR5K_INT_MIB; | |
fa1c114f | 2553 | |
8aec7af9 | 2554 | ret = ath5k_reset(sc, NULL, false); |
8a63facc BC |
2555 | if (ret) |
2556 | goto done; | |
fa1c114f | 2557 | |
8a63facc BC |
2558 | ath5k_rfkill_hw_start(ah); |
2559 | ||
2560 | /* | |
2561 | * Reset the key cache since some parts do not reset the | |
2562 | * contents on initial power up or resume from suspend. | |
2563 | */ | |
2564 | for (i = 0; i < common->keymax; i++) | |
2565 | ath_hw_keyreset(common, (u16) i); | |
2566 | ||
61cde037 NK |
2567 | /* Use higher rates for acks instead of base |
2568 | * rate */ | |
2569 | ah->ah_ack_bitrate_high = true; | |
b1ae1edf BG |
2570 | |
2571 | for (i = 0; i < ARRAY_SIZE(sc->bslot); i++) | |
2572 | sc->bslot[i] = NULL; | |
2573 | ||
8a63facc BC |
2574 | ret = 0; |
2575 | done: | |
2576 | mmiowb(); | |
2577 | mutex_unlock(&sc->lock); | |
4edd761f BR |
2578 | |
2579 | ieee80211_queue_delayed_work(sc->hw, &sc->tx_complete_work, | |
2580 | msecs_to_jiffies(ATH5K_TX_COMPLETE_POLL_INT)); | |
2581 | ||
8a63facc BC |
2582 | return ret; |
2583 | } | |
2584 | ||
2585 | static void stop_tasklets(struct ath5k_softc *sc) | |
2586 | { | |
2587 | tasklet_kill(&sc->rxtq); | |
2588 | tasklet_kill(&sc->txtq); | |
2589 | tasklet_kill(&sc->calib); | |
2590 | tasklet_kill(&sc->beacontq); | |
2591 | tasklet_kill(&sc->ani_tasklet); | |
2592 | } | |
2593 | ||
2594 | /* | |
2595 | * Stop the device, grabbing the top-level lock to protect | |
2596 | * against concurrent entry through ath5k_init (which can happen | |
2597 | * if another thread does a system call and the thread doing the | |
2598 | * stop is preempted). | |
2599 | */ | |
2600 | static int | |
2601 | ath5k_stop_hw(struct ath5k_softc *sc) | |
2602 | { | |
2603 | int ret; | |
2604 | ||
2605 | mutex_lock(&sc->lock); | |
2606 | ret = ath5k_stop_locked(sc); | |
2607 | if (ret == 0 && !test_bit(ATH_STAT_INVALID, sc->status)) { | |
2608 | /* | |
2609 | * Don't set the card in full sleep mode! | |
2610 | * | |
2611 | * a) When the device is in this state it must be carefully | |
2612 | * woken up or references to registers in the PCI clock | |
2613 | * domain may freeze the bus (and system). This varies | |
2614 | * by chip and is mostly an issue with newer parts | |
2615 | * (madwifi sources mentioned srev >= 0x78) that go to | |
2616 | * sleep more quickly. | |
2617 | * | |
2618 | * b) On older chips full sleep results a weird behaviour | |
2619 | * during wakeup. I tested various cards with srev < 0x78 | |
2620 | * and they don't wake up after module reload, a second | |
2621 | * module reload is needed to bring the card up again. | |
2622 | * | |
2623 | * Until we figure out what's going on don't enable | |
2624 | * full chip reset on any chip (this is what Legacy HAL | |
2625 | * and Sam's HAL do anyway). Instead Perform a full reset | |
2626 | * on the device (same as initial state after attach) and | |
2627 | * leave it idle (keep MAC/BB on warm reset) */ | |
2628 | ret = ath5k_hw_on_hold(sc->ah); | |
2629 | ||
2630 | ATH5K_DBG(sc, ATH5K_DEBUG_RESET, | |
2631 | "putting device to sleep\n"); | |
fa1c114f JS |
2632 | } |
2633 | ||
8a63facc BC |
2634 | mmiowb(); |
2635 | mutex_unlock(&sc->lock); | |
2636 | ||
2637 | stop_tasklets(sc); | |
2638 | ||
4edd761f BR |
2639 | cancel_delayed_work_sync(&sc->tx_complete_work); |
2640 | ||
8a63facc BC |
2641 | ath5k_rfkill_hw_stop(sc->ah); |
2642 | ||
2643 | return ret; | |
fa1c114f JS |
2644 | } |
2645 | ||
209d889b BC |
2646 | /* |
2647 | * Reset the hardware. If chan is not NULL, then also pause rx/tx | |
2648 | * and change to the given channel. | |
5faaff74 BC |
2649 | * |
2650 | * This should be called with sc->lock. | |
209d889b | 2651 | */ |
fa1c114f | 2652 | static int |
8aec7af9 NK |
2653 | ath5k_reset(struct ath5k_softc *sc, struct ieee80211_channel *chan, |
2654 | bool skip_pcu) | |
fa1c114f | 2655 | { |
fa1c114f | 2656 | struct ath5k_hw *ah = sc->ah; |
344b54b9 | 2657 | int ret, ani_mode; |
fa1c114f JS |
2658 | |
2659 | ATH5K_DBG(sc, ATH5K_DEBUG_RESET, "resetting\n"); | |
fa1c114f | 2660 | |
450464de | 2661 | ath5k_hw_set_imr(ah, 0); |
aeae4ac9 | 2662 | synchronize_irq(sc->irq); |
450464de BC |
2663 | stop_tasklets(sc); |
2664 | ||
344b54b9 NK |
2665 | /* Save ani mode and disable ANI durring |
2666 | * reset. If we don't we might get false | |
2667 | * PHY error interrupts. */ | |
2668 | ani_mode = ah->ah_sc->ani_state.ani_mode; | |
2669 | ath5k_ani_init(ah, ATH5K_ANI_MODE_OFF); | |
2670 | ||
19252ecb NK |
2671 | /* We are going to empty hw queues |
2672 | * so we should also free any remaining | |
2673 | * tx buffers */ | |
2674 | ath5k_drain_tx_buffs(sc); | |
209d889b | 2675 | if (chan) { |
209d889b BC |
2676 | sc->curchan = chan; |
2677 | sc->curband = &sc->sbands[chan->band]; | |
d7dc1003 | 2678 | } |
8aec7af9 NK |
2679 | ret = ath5k_hw_reset(ah, sc->opmode, sc->curchan, chan != NULL, |
2680 | skip_pcu); | |
d7dc1003 | 2681 | if (ret) { |
fa1c114f JS |
2682 | ATH5K_ERR(sc, "can't reset hardware (%d)\n", ret); |
2683 | goto err; | |
2684 | } | |
d7dc1003 | 2685 | |
fa1c114f | 2686 | ret = ath5k_rx_start(sc); |
d7dc1003 | 2687 | if (ret) { |
fa1c114f JS |
2688 | ATH5K_ERR(sc, "can't start recv logic\n"); |
2689 | goto err; | |
2690 | } | |
d7dc1003 | 2691 | |
344b54b9 | 2692 | ath5k_ani_init(ah, ani_mode); |
2111ac0d | 2693 | |
ac559526 BR |
2694 | ah->ah_cal_next_full = jiffies; |
2695 | ah->ah_cal_next_ani = jiffies; | |
afe86286 | 2696 | ah->ah_cal_next_nf = jiffies; |
5dcc03fe | 2697 | ewma_init(&ah->ah_beacon_rssi_avg, 1024, 8); |
afe86286 | 2698 | |
fa1c114f | 2699 | /* |
d7dc1003 JS |
2700 | * Change channels and update the h/w rate map if we're switching; |
2701 | * e.g. 11a to 11b/g. | |
2702 | * | |
2703 | * We may be doing a reset in response to an ioctl that changes the | |
2704 | * channel so update any state that might change as a result. | |
fa1c114f JS |
2705 | * |
2706 | * XXX needed? | |
2707 | */ | |
2708 | /* ath5k_chan_change(sc, c); */ | |
fa1c114f | 2709 | |
d7dc1003 JS |
2710 | ath5k_beacon_config(sc); |
2711 | /* intrs are enabled by ath5k_beacon_config */ | |
fa1c114f | 2712 | |
397f385b BR |
2713 | ieee80211_wake_queues(sc->hw); |
2714 | ||
fa1c114f JS |
2715 | return 0; |
2716 | err: | |
2717 | return ret; | |
2718 | } | |
2719 | ||
5faaff74 BC |
2720 | static void ath5k_reset_work(struct work_struct *work) |
2721 | { | |
2722 | struct ath5k_softc *sc = container_of(work, struct ath5k_softc, | |
2723 | reset_work); | |
2724 | ||
2725 | mutex_lock(&sc->lock); | |
8aec7af9 | 2726 | ath5k_reset(sc, NULL, true); |
5faaff74 BC |
2727 | mutex_unlock(&sc->lock); |
2728 | } | |
2729 | ||
8a63facc | 2730 | static int |
132b1c3e | 2731 | ath5k_init(struct ieee80211_hw *hw) |
fa1c114f | 2732 | { |
132b1c3e | 2733 | |
fa1c114f | 2734 | struct ath5k_softc *sc = hw->priv; |
8a63facc BC |
2735 | struct ath5k_hw *ah = sc->ah; |
2736 | struct ath_regulatory *regulatory = ath5k_hw_regulatory(ah); | |
925e0b06 | 2737 | struct ath5k_txq *txq; |
8a63facc | 2738 | u8 mac[ETH_ALEN] = {}; |
fa1c114f JS |
2739 | int ret; |
2740 | ||
fa1c114f | 2741 | |
8a63facc BC |
2742 | /* |
2743 | * Check if the MAC has multi-rate retry support. | |
2744 | * We do this by trying to setup a fake extended | |
2745 | * descriptor. MACs that don't have support will | |
2746 | * return false w/o doing anything. MACs that do | |
2747 | * support it will return true w/o doing anything. | |
2748 | */ | |
2749 | ret = ath5k_hw_setup_mrr_tx_desc(ah, NULL, 0, 0, 0, 0, 0, 0); | |
67d2e2df | 2750 | |
8a63facc BC |
2751 | if (ret < 0) |
2752 | goto err; | |
2753 | if (ret > 0) | |
2754 | __set_bit(ATH_STAT_MRRETRY, sc->status); | |
ccfe5552 | 2755 | |
8a63facc BC |
2756 | /* |
2757 | * Collect the channel list. The 802.11 layer | |
2758 | * is resposible for filtering this list based | |
2759 | * on settings like the phy mode and regulatory | |
2760 | * domain restrictions. | |
2761 | */ | |
2762 | ret = ath5k_setup_bands(hw); | |
2763 | if (ret) { | |
2764 | ATH5K_ERR(sc, "can't get channels\n"); | |
2765 | goto err; | |
2766 | } | |
67d2e2df | 2767 | |
8a63facc BC |
2768 | /* NB: setup here so ath5k_rate_update is happy */ |
2769 | if (test_bit(AR5K_MODE_11A, ah->ah_modes)) | |
2770 | ath5k_setcurmode(sc, AR5K_MODE_11A); | |
2771 | else | |
2772 | ath5k_setcurmode(sc, AR5K_MODE_11B); | |
fa1c114f | 2773 | |
8a63facc BC |
2774 | /* |
2775 | * Allocate tx+rx descriptors and populate the lists. | |
2776 | */ | |
aeae4ac9 | 2777 | ret = ath5k_desc_alloc(sc); |
8a63facc BC |
2778 | if (ret) { |
2779 | ATH5K_ERR(sc, "can't allocate descriptors\n"); | |
2780 | goto err; | |
2781 | } | |
fa1c114f | 2782 | |
8a63facc BC |
2783 | /* |
2784 | * Allocate hardware transmit queues: one queue for | |
2785 | * beacon frames and one data queue for each QoS | |
2786 | * priority. Note that hw functions handle resetting | |
2787 | * these queues at the needed time. | |
2788 | */ | |
2789 | ret = ath5k_beaconq_setup(ah); | |
2790 | if (ret < 0) { | |
2791 | ATH5K_ERR(sc, "can't setup a beacon xmit queue\n"); | |
2792 | goto err_desc; | |
2793 | } | |
2794 | sc->bhalq = ret; | |
2795 | sc->cabq = ath5k_txq_setup(sc, AR5K_TX_QUEUE_CAB, 0); | |
2796 | if (IS_ERR(sc->cabq)) { | |
2797 | ATH5K_ERR(sc, "can't setup cab queue\n"); | |
2798 | ret = PTR_ERR(sc->cabq); | |
2799 | goto err_bhal; | |
2800 | } | |
fa1c114f | 2801 | |
22d8d9f8 BR |
2802 | /* 5211 and 5212 usually support 10 queues but we better rely on the |
2803 | * capability information */ | |
2804 | if (ah->ah_capabilities.cap_queues.q_tx_num >= 6) { | |
2805 | /* This order matches mac80211's queue priority, so we can | |
2806 | * directly use the mac80211 queue number without any mapping */ | |
2807 | txq = ath5k_txq_setup(sc, AR5K_TX_QUEUE_DATA, AR5K_WME_AC_VO); | |
2808 | if (IS_ERR(txq)) { | |
2809 | ATH5K_ERR(sc, "can't setup xmit queue\n"); | |
2810 | ret = PTR_ERR(txq); | |
2811 | goto err_queues; | |
2812 | } | |
2813 | txq = ath5k_txq_setup(sc, AR5K_TX_QUEUE_DATA, AR5K_WME_AC_VI); | |
2814 | if (IS_ERR(txq)) { | |
2815 | ATH5K_ERR(sc, "can't setup xmit queue\n"); | |
2816 | ret = PTR_ERR(txq); | |
2817 | goto err_queues; | |
2818 | } | |
2819 | txq = ath5k_txq_setup(sc, AR5K_TX_QUEUE_DATA, AR5K_WME_AC_BE); | |
2820 | if (IS_ERR(txq)) { | |
2821 | ATH5K_ERR(sc, "can't setup xmit queue\n"); | |
2822 | ret = PTR_ERR(txq); | |
2823 | goto err_queues; | |
2824 | } | |
2825 | txq = ath5k_txq_setup(sc, AR5K_TX_QUEUE_DATA, AR5K_WME_AC_BK); | |
2826 | if (IS_ERR(txq)) { | |
2827 | ATH5K_ERR(sc, "can't setup xmit queue\n"); | |
2828 | ret = PTR_ERR(txq); | |
2829 | goto err_queues; | |
2830 | } | |
2831 | hw->queues = 4; | |
2832 | } else { | |
2833 | /* older hardware (5210) can only support one data queue */ | |
2834 | txq = ath5k_txq_setup(sc, AR5K_TX_QUEUE_DATA, AR5K_WME_AC_BE); | |
2835 | if (IS_ERR(txq)) { | |
2836 | ATH5K_ERR(sc, "can't setup xmit queue\n"); | |
2837 | ret = PTR_ERR(txq); | |
2838 | goto err_queues; | |
2839 | } | |
2840 | hw->queues = 1; | |
2841 | } | |
fa1c114f | 2842 | |
8a63facc BC |
2843 | tasklet_init(&sc->rxtq, ath5k_tasklet_rx, (unsigned long)sc); |
2844 | tasklet_init(&sc->txtq, ath5k_tasklet_tx, (unsigned long)sc); | |
2845 | tasklet_init(&sc->calib, ath5k_tasklet_calibrate, (unsigned long)sc); | |
2846 | tasklet_init(&sc->beacontq, ath5k_tasklet_beacon, (unsigned long)sc); | |
2847 | tasklet_init(&sc->ani_tasklet, ath5k_tasklet_ani, (unsigned long)sc); | |
be009370 | 2848 | |
8a63facc | 2849 | INIT_WORK(&sc->reset_work, ath5k_reset_work); |
4edd761f | 2850 | INIT_DELAYED_WORK(&sc->tx_complete_work, ath5k_tx_complete_poll_work); |
fa1c114f | 2851 | |
8a63facc BC |
2852 | ret = ath5k_eeprom_read_mac(ah, mac); |
2853 | if (ret) { | |
aeae4ac9 | 2854 | ATH5K_ERR(sc, "unable to read address from EEPROM\n"); |
8a63facc | 2855 | goto err_queues; |
e30eb4ab | 2856 | } |
2bed03eb | 2857 | |
8a63facc | 2858 | SET_IEEE80211_PERM_ADDR(hw, mac); |
b1ae1edf | 2859 | memcpy(&sc->lladdr, mac, ETH_ALEN); |
8a63facc | 2860 | /* All MAC address bits matter for ACKs */ |
62c58fb4 | 2861 | ath5k_update_bssid_mask_and_opmode(sc, NULL); |
8a63facc BC |
2862 | |
2863 | regulatory->current_rd = ah->ah_capabilities.cap_eeprom.ee_regdomain; | |
2864 | ret = ath_regd_init(regulatory, hw->wiphy, ath5k_reg_notifier); | |
2865 | if (ret) { | |
2866 | ATH5K_ERR(sc, "can't initialize regulatory system\n"); | |
2867 | goto err_queues; | |
2868 | } | |
2869 | ||
2870 | ret = ieee80211_register_hw(hw); | |
2871 | if (ret) { | |
2872 | ATH5K_ERR(sc, "can't register ieee80211 hw\n"); | |
2873 | goto err_queues; | |
2874 | } | |
2875 | ||
2876 | if (!ath_is_world_regd(regulatory)) | |
2877 | regulatory_hint(hw->wiphy, regulatory->alpha2); | |
2878 | ||
2879 | ath5k_init_leds(sc); | |
2880 | ||
2881 | ath5k_sysfs_register(sc); | |
2882 | ||
2883 | return 0; | |
2884 | err_queues: | |
2885 | ath5k_txq_release(sc); | |
2886 | err_bhal: | |
2887 | ath5k_hw_release_tx_queue(ah, sc->bhalq); | |
2888 | err_desc: | |
aeae4ac9 | 2889 | ath5k_desc_free(sc); |
8a63facc BC |
2890 | err: |
2891 | return ret; | |
2892 | } | |
2893 | ||
132b1c3e FF |
2894 | void |
2895 | ath5k_deinit_softc(struct ath5k_softc *sc) | |
8a63facc | 2896 | { |
132b1c3e | 2897 | struct ieee80211_hw *hw = sc->hw; |
8a63facc BC |
2898 | |
2899 | /* | |
2900 | * NB: the order of these is important: | |
2901 | * o call the 802.11 layer before detaching ath5k_hw to | |
2902 | * ensure callbacks into the driver to delete global | |
2903 | * key cache entries can be handled | |
2904 | * o reclaim the tx queue data structures after calling | |
2905 | * the 802.11 layer as we'll get called back to reclaim | |
2906 | * node state and potentially want to use them | |
2907 | * o to cleanup the tx queues the hal is called, so detach | |
2908 | * it last | |
2909 | * XXX: ??? detach ath5k_hw ??? | |
2910 | * Other than that, it's straightforward... | |
2911 | */ | |
132b1c3e | 2912 | ath5k_debug_finish_device(sc); |
8a63facc | 2913 | ieee80211_unregister_hw(hw); |
aeae4ac9 | 2914 | ath5k_desc_free(sc); |
8a63facc BC |
2915 | ath5k_txq_release(sc); |
2916 | ath5k_hw_release_tx_queue(sc->ah, sc->bhalq); | |
2917 | ath5k_unregister_leds(sc); | |
2918 | ||
2919 | ath5k_sysfs_unregister(sc); | |
2920 | /* | |
2921 | * NB: can't reclaim these until after ieee80211_ifdetach | |
2922 | * returns because we'll get called back to reclaim node | |
2923 | * state and potentially want to use them. | |
2924 | */ | |
132b1c3e FF |
2925 | ath5k_hw_deinit(sc->ah); |
2926 | free_irq(sc->irq, sc); | |
8a63facc BC |
2927 | } |
2928 | ||
2929 | /********************\ | |
2930 | * Mac80211 functions * | |
2931 | \********************/ | |
2932 | ||
2933 | static int | |
2934 | ath5k_tx(struct ieee80211_hw *hw, struct sk_buff *skb) | |
2935 | { | |
2936 | struct ath5k_softc *sc = hw->priv; | |
925e0b06 BR |
2937 | u16 qnum = skb_get_queue_mapping(skb); |
2938 | ||
2939 | if (WARN_ON(qnum >= sc->ah->ah_capabilities.cap_queues.q_tx_num)) { | |
2940 | dev_kfree_skb_any(skb); | |
2941 | return 0; | |
2942 | } | |
8a63facc | 2943 | |
925e0b06 | 2944 | return ath5k_tx_queue(hw, skb, &sc->txqs[qnum]); |
8a63facc BC |
2945 | } |
2946 | ||
2947 | static int ath5k_start(struct ieee80211_hw *hw) | |
2948 | { | |
132b1c3e | 2949 | return ath5k_init_hw(hw->priv); |
8a63facc BC |
2950 | } |
2951 | ||
2952 | static void ath5k_stop(struct ieee80211_hw *hw) | |
2953 | { | |
2954 | ath5k_stop_hw(hw->priv); | |
2955 | } | |
2956 | ||
2957 | static int ath5k_add_interface(struct ieee80211_hw *hw, | |
2958 | struct ieee80211_vif *vif) | |
2959 | { | |
2960 | struct ath5k_softc *sc = hw->priv; | |
2961 | int ret; | |
b1ae1edf | 2962 | struct ath5k_vif *avf = (void *)vif->drv_priv; |
8a63facc BC |
2963 | |
2964 | mutex_lock(&sc->lock); | |
b1ae1edf BG |
2965 | |
2966 | if ((vif->type == NL80211_IFTYPE_AP || | |
2967 | vif->type == NL80211_IFTYPE_ADHOC) | |
2968 | && (sc->num_ap_vifs + sc->num_adhoc_vifs) >= ATH_BCBUF) { | |
2969 | ret = -ELNRNG; | |
8a63facc BC |
2970 | goto end; |
2971 | } | |
2972 | ||
b1ae1edf BG |
2973 | /* Don't allow other interfaces if one ad-hoc is configured. |
2974 | * TODO: Fix the problems with ad-hoc and multiple other interfaces. | |
2975 | * We would need to operate the HW in ad-hoc mode to allow TSF updates | |
2976 | * for the IBSS, but this breaks with additional AP or STA interfaces | |
2977 | * at the moment. */ | |
2978 | if (sc->num_adhoc_vifs || | |
2979 | (sc->nvifs && vif->type == NL80211_IFTYPE_ADHOC)) { | |
2980 | ATH5K_ERR(sc, "Only one single ad-hoc interface is allowed.\n"); | |
2981 | ret = -ELNRNG; | |
2982 | goto end; | |
2983 | } | |
8a63facc BC |
2984 | |
2985 | switch (vif->type) { | |
2986 | case NL80211_IFTYPE_AP: | |
2987 | case NL80211_IFTYPE_STATION: | |
2988 | case NL80211_IFTYPE_ADHOC: | |
2989 | case NL80211_IFTYPE_MESH_POINT: | |
b1ae1edf | 2990 | avf->opmode = vif->type; |
8a63facc BC |
2991 | break; |
2992 | default: | |
2993 | ret = -EOPNOTSUPP; | |
2994 | goto end; | |
2995 | } | |
2996 | ||
b1ae1edf BG |
2997 | sc->nvifs++; |
2998 | ATH5K_DBG(sc, ATH5K_DEBUG_MODE, "add interface mode %d\n", avf->opmode); | |
8a63facc | 2999 | |
b1ae1edf BG |
3000 | /* Assign the vap/adhoc to a beacon xmit slot. */ |
3001 | if ((avf->opmode == NL80211_IFTYPE_AP) || | |
d82b577b JC |
3002 | (avf->opmode == NL80211_IFTYPE_ADHOC) || |
3003 | (avf->opmode == NL80211_IFTYPE_MESH_POINT)) { | |
b1ae1edf BG |
3004 | int slot; |
3005 | ||
3006 | WARN_ON(list_empty(&sc->bcbuf)); | |
3007 | avf->bbuf = list_first_entry(&sc->bcbuf, struct ath5k_buf, | |
3008 | list); | |
3009 | list_del(&avf->bbuf->list); | |
3010 | ||
3011 | avf->bslot = 0; | |
3012 | for (slot = 0; slot < ATH_BCBUF; slot++) { | |
3013 | if (!sc->bslot[slot]) { | |
3014 | avf->bslot = slot; | |
3015 | break; | |
3016 | } | |
3017 | } | |
3018 | BUG_ON(sc->bslot[avf->bslot] != NULL); | |
3019 | sc->bslot[avf->bslot] = vif; | |
3020 | if (avf->opmode == NL80211_IFTYPE_AP) | |
3021 | sc->num_ap_vifs++; | |
c26d5339 | 3022 | else if (avf->opmode == NL80211_IFTYPE_ADHOC) |
b1ae1edf BG |
3023 | sc->num_adhoc_vifs++; |
3024 | } | |
3025 | ||
b1ae1edf BG |
3026 | /* Any MAC address is fine, all others are included through the |
3027 | * filter. | |
3028 | */ | |
3029 | memcpy(&sc->lladdr, vif->addr, ETH_ALEN); | |
8a63facc | 3030 | ath5k_hw_set_lladdr(sc->ah, vif->addr); |
b1ae1edf BG |
3031 | |
3032 | memcpy(&avf->lladdr, vif->addr, ETH_ALEN); | |
3033 | ||
3034 | ath5k_mode_setup(sc, vif); | |
8a63facc BC |
3035 | |
3036 | ret = 0; | |
3037 | end: | |
3038 | mutex_unlock(&sc->lock); | |
3039 | return ret; | |
3040 | } | |
3041 | ||
3042 | static void | |
3043 | ath5k_remove_interface(struct ieee80211_hw *hw, | |
3044 | struct ieee80211_vif *vif) | |
3045 | { | |
3046 | struct ath5k_softc *sc = hw->priv; | |
b1ae1edf BG |
3047 | struct ath5k_vif *avf = (void *)vif->drv_priv; |
3048 | unsigned int i; | |
8a63facc BC |
3049 | |
3050 | mutex_lock(&sc->lock); | |
b1ae1edf BG |
3051 | sc->nvifs--; |
3052 | ||
3053 | if (avf->bbuf) { | |
3054 | ath5k_txbuf_free_skb(sc, avf->bbuf); | |
3055 | list_add_tail(&avf->bbuf->list, &sc->bcbuf); | |
3056 | for (i = 0; i < ATH_BCBUF; i++) { | |
3057 | if (sc->bslot[i] == vif) { | |
3058 | sc->bslot[i] = NULL; | |
3059 | break; | |
3060 | } | |
3061 | } | |
3062 | avf->bbuf = NULL; | |
3063 | } | |
3064 | if (avf->opmode == NL80211_IFTYPE_AP) | |
3065 | sc->num_ap_vifs--; | |
3066 | else if (avf->opmode == NL80211_IFTYPE_ADHOC) | |
3067 | sc->num_adhoc_vifs--; | |
8a63facc | 3068 | |
62c58fb4 | 3069 | ath5k_update_bssid_mask_and_opmode(sc, NULL); |
8a63facc BC |
3070 | mutex_unlock(&sc->lock); |
3071 | } | |
3072 | ||
3073 | /* | |
3074 | * TODO: Phy disable/diversity etc | |
3075 | */ | |
3076 | static int | |
3077 | ath5k_config(struct ieee80211_hw *hw, u32 changed) | |
3078 | { | |
3079 | struct ath5k_softc *sc = hw->priv; | |
3080 | struct ath5k_hw *ah = sc->ah; | |
3081 | struct ieee80211_conf *conf = &hw->conf; | |
3082 | int ret = 0; | |
3083 | ||
3084 | mutex_lock(&sc->lock); | |
3085 | ||
3086 | if (changed & IEEE80211_CONF_CHANGE_CHANNEL) { | |
3087 | ret = ath5k_chan_set(sc, conf->channel); | |
3088 | if (ret < 0) | |
3089 | goto unlock; | |
3090 | } | |
3091 | ||
3092 | if ((changed & IEEE80211_CONF_CHANGE_POWER) && | |
3093 | (sc->power_level != conf->power_level)) { | |
a0823810 NK |
3094 | sc->power_level = conf->power_level; |
3095 | ||
3096 | /* Half dB steps */ | |
3097 | ath5k_hw_set_txpower_limit(ah, (conf->power_level * 2)); | |
3098 | } | |
fa1c114f | 3099 | |
2bed03eb NK |
3100 | /* TODO: |
3101 | * 1) Move this on config_interface and handle each case | |
3102 | * separately eg. when we have only one STA vif, use | |
3103 | * AR5K_ANTMODE_SINGLE_AP | |
3104 | * | |
3105 | * 2) Allow the user to change antenna mode eg. when only | |
3106 | * one antenna is present | |
3107 | * | |
3108 | * 3) Allow the user to set default/tx antenna when possible | |
3109 | * | |
3110 | * 4) Default mode should handle 90% of the cases, together | |
3111 | * with fixed a/b and single AP modes we should be able to | |
3112 | * handle 99%. Sectored modes are extreme cases and i still | |
3113 | * haven't found a usage for them. If we decide to support them, | |
3114 | * then we must allow the user to set how many tx antennas we | |
3115 | * have available | |
3116 | */ | |
caec9112 | 3117 | ath5k_hw_set_antenna_mode(ah, ah->ah_ant_mode); |
be009370 | 3118 | |
55aa4e0f | 3119 | unlock: |
be009370 | 3120 | mutex_unlock(&sc->lock); |
55aa4e0f | 3121 | return ret; |
fa1c114f JS |
3122 | } |
3123 | ||
3ac64bee | 3124 | static u64 ath5k_prepare_multicast(struct ieee80211_hw *hw, |
22bedad3 | 3125 | struct netdev_hw_addr_list *mc_list) |
3ac64bee JB |
3126 | { |
3127 | u32 mfilt[2], val; | |
3ac64bee | 3128 | u8 pos; |
22bedad3 | 3129 | struct netdev_hw_addr *ha; |
3ac64bee JB |
3130 | |
3131 | mfilt[0] = 0; | |
3132 | mfilt[1] = 1; | |
3133 | ||
22bedad3 | 3134 | netdev_hw_addr_list_for_each(ha, mc_list) { |
3ac64bee | 3135 | /* calculate XOR of eight 6-bit values */ |
22bedad3 | 3136 | val = get_unaligned_le32(ha->addr + 0); |
3ac64bee | 3137 | pos = (val >> 18) ^ (val >> 12) ^ (val >> 6) ^ val; |
22bedad3 | 3138 | val = get_unaligned_le32(ha->addr + 3); |
3ac64bee JB |
3139 | pos ^= (val >> 18) ^ (val >> 12) ^ (val >> 6) ^ val; |
3140 | pos &= 0x3f; | |
3141 | mfilt[pos / 32] |= (1 << (pos % 32)); | |
3142 | /* XXX: we might be able to just do this instead, | |
3143 | * but not sure, needs testing, if we do use this we'd | |
3144 | * neet to inform below to not reset the mcast */ | |
3145 | /* ath5k_hw_set_mcast_filterindex(ah, | |
22bedad3 | 3146 | * ha->addr[5]); */ |
3ac64bee JB |
3147 | } |
3148 | ||
3149 | return ((u64)(mfilt[1]) << 32) | mfilt[0]; | |
3150 | } | |
3151 | ||
b1ae1edf BG |
3152 | static bool ath_any_vif_assoc(struct ath5k_softc *sc) |
3153 | { | |
3154 | struct ath_vif_iter_data iter_data; | |
3155 | iter_data.hw_macaddr = NULL; | |
3156 | iter_data.any_assoc = false; | |
3157 | iter_data.need_set_hw_addr = false; | |
3158 | iter_data.found_active = true; | |
3159 | ||
3160 | ieee80211_iterate_active_interfaces_atomic(sc->hw, ath_vif_iter, | |
3161 | &iter_data); | |
3162 | return iter_data.any_assoc; | |
3163 | } | |
3164 | ||
fa1c114f JS |
3165 | #define SUPPORTED_FIF_FLAGS \ |
3166 | FIF_PROMISC_IN_BSS | FIF_ALLMULTI | FIF_FCSFAIL | \ | |
3167 | FIF_PLCPFAIL | FIF_CONTROL | FIF_OTHER_BSS | \ | |
3168 | FIF_BCN_PRBRESP_PROMISC | |
3169 | /* | |
3170 | * o always accept unicast, broadcast, and multicast traffic | |
3171 | * o multicast traffic for all BSSIDs will be enabled if mac80211 | |
3172 | * says it should be | |
3173 | * o maintain current state of phy ofdm or phy cck error reception. | |
3174 | * If the hardware detects any of these type of errors then | |
3175 | * ath5k_hw_get_rx_filter() will pass to us the respective | |
3176 | * hardware filters to be able to receive these type of frames. | |
3177 | * o probe request frames are accepted only when operating in | |
3178 | * hostap, adhoc, or monitor modes | |
3179 | * o enable promiscuous mode according to the interface state | |
3180 | * o accept beacons: | |
3181 | * - when operating in adhoc mode so the 802.11 layer creates | |
3182 | * node table entries for peers, | |
3183 | * - when operating in station mode for collecting rssi data when | |
3184 | * the station is otherwise quiet, or | |
3185 | * - when scanning | |
3186 | */ | |
3187 | static void ath5k_configure_filter(struct ieee80211_hw *hw, | |
3188 | unsigned int changed_flags, | |
3189 | unsigned int *new_flags, | |
3ac64bee | 3190 | u64 multicast) |
fa1c114f JS |
3191 | { |
3192 | struct ath5k_softc *sc = hw->priv; | |
3193 | struct ath5k_hw *ah = sc->ah; | |
3ac64bee | 3194 | u32 mfilt[2], rfilt; |
fa1c114f | 3195 | |
56d1de0a BC |
3196 | mutex_lock(&sc->lock); |
3197 | ||
3ac64bee JB |
3198 | mfilt[0] = multicast; |
3199 | mfilt[1] = multicast >> 32; | |
fa1c114f JS |
3200 | |
3201 | /* Only deal with supported flags */ | |
3202 | changed_flags &= SUPPORTED_FIF_FLAGS; | |
3203 | *new_flags &= SUPPORTED_FIF_FLAGS; | |
3204 | ||
3205 | /* If HW detects any phy or radar errors, leave those filters on. | |
3206 | * Also, always enable Unicast, Broadcasts and Multicast | |
3207 | * XXX: move unicast, bssid broadcasts and multicast to mac80211 */ | |
3208 | rfilt = (ath5k_hw_get_rx_filter(ah) & (AR5K_RX_FILTER_PHYERR)) | | |
3209 | (AR5K_RX_FILTER_UCAST | AR5K_RX_FILTER_BCAST | | |
3210 | AR5K_RX_FILTER_MCAST); | |
3211 | ||
3212 | if (changed_flags & (FIF_PROMISC_IN_BSS | FIF_OTHER_BSS)) { | |
3213 | if (*new_flags & FIF_PROMISC_IN_BSS) { | |
fa1c114f | 3214 | __set_bit(ATH_STAT_PROMISC, sc->status); |
0bbac08f | 3215 | } else { |
fa1c114f | 3216 | __clear_bit(ATH_STAT_PROMISC, sc->status); |
0bbac08f | 3217 | } |
fa1c114f JS |
3218 | } |
3219 | ||
6b5dcccb BC |
3220 | if (test_bit(ATH_STAT_PROMISC, sc->status)) |
3221 | rfilt |= AR5K_RX_FILTER_PROM; | |
3222 | ||
fa1c114f JS |
3223 | /* Note, AR5K_RX_FILTER_MCAST is already enabled */ |
3224 | if (*new_flags & FIF_ALLMULTI) { | |
3225 | mfilt[0] = ~0; | |
3226 | mfilt[1] = ~0; | |
fa1c114f JS |
3227 | } |
3228 | ||
3229 | /* This is the best we can do */ | |
3230 | if (*new_flags & (FIF_FCSFAIL | FIF_PLCPFAIL)) | |
3231 | rfilt |= AR5K_RX_FILTER_PHYERR; | |
3232 | ||
3233 | /* FIF_BCN_PRBRESP_PROMISC really means to enable beacons | |
30bf4169 | 3234 | * and probes for any BSSID */ |
b1ae1edf | 3235 | if ((*new_flags & FIF_BCN_PRBRESP_PROMISC) || (sc->nvifs > 1)) |
30bf4169 | 3236 | rfilt |= AR5K_RX_FILTER_BEACON; |
fa1c114f JS |
3237 | |
3238 | /* FIF_CONTROL doc says that if FIF_PROMISC_IN_BSS is not | |
3239 | * set we should only pass on control frames for this | |
3240 | * station. This needs testing. I believe right now this | |
3241 | * enables *all* control frames, which is OK.. but | |
3242 | * but we should see if we can improve on granularity */ | |
3243 | if (*new_flags & FIF_CONTROL) | |
3244 | rfilt |= AR5K_RX_FILTER_CONTROL; | |
3245 | ||
3246 | /* Additional settings per mode -- this is per ath5k */ | |
3247 | ||
3248 | /* XXX move these to mac80211, and add a beacon IFF flag to mac80211 */ | |
3249 | ||
56d1de0a BC |
3250 | switch (sc->opmode) { |
3251 | case NL80211_IFTYPE_MESH_POINT: | |
56d1de0a BC |
3252 | rfilt |= AR5K_RX_FILTER_CONTROL | |
3253 | AR5K_RX_FILTER_BEACON | | |
3254 | AR5K_RX_FILTER_PROBEREQ | | |
3255 | AR5K_RX_FILTER_PROM; | |
3256 | break; | |
3257 | case NL80211_IFTYPE_AP: | |
3258 | case NL80211_IFTYPE_ADHOC: | |
3259 | rfilt |= AR5K_RX_FILTER_PROBEREQ | | |
3260 | AR5K_RX_FILTER_BEACON; | |
3261 | break; | |
3262 | case NL80211_IFTYPE_STATION: | |
3263 | if (sc->assoc) | |
3264 | rfilt |= AR5K_RX_FILTER_BEACON; | |
3265 | default: | |
3266 | break; | |
3267 | } | |
fa1c114f JS |
3268 | |
3269 | /* Set filters */ | |
0bbac08f | 3270 | ath5k_hw_set_rx_filter(ah, rfilt); |
fa1c114f JS |
3271 | |
3272 | /* Set multicast bits */ | |
3273 | ath5k_hw_set_mcast_filter(ah, mfilt[0], mfilt[1]); | |
a180a130 | 3274 | /* Set the cached hw filter flags, this will later actually |
fa1c114f JS |
3275 | * be set in HW */ |
3276 | sc->filter_flags = rfilt; | |
56d1de0a BC |
3277 | |
3278 | mutex_unlock(&sc->lock); | |
fa1c114f JS |
3279 | } |
3280 | ||
3281 | static int | |
3282 | ath5k_set_key(struct ieee80211_hw *hw, enum set_key_cmd cmd, | |
dc822b5d JB |
3283 | struct ieee80211_vif *vif, struct ieee80211_sta *sta, |
3284 | struct ieee80211_key_conf *key) | |
fa1c114f JS |
3285 | { |
3286 | struct ath5k_softc *sc = hw->priv; | |
dc1e001b LR |
3287 | struct ath5k_hw *ah = sc->ah; |
3288 | struct ath_common *common = ath5k_hw_common(ah); | |
fa1c114f JS |
3289 | int ret = 0; |
3290 | ||
9ad9a26e BC |
3291 | if (modparam_nohwcrypt) |
3292 | return -EOPNOTSUPP; | |
3293 | ||
97359d12 JB |
3294 | switch (key->cipher) { |
3295 | case WLAN_CIPHER_SUITE_WEP40: | |
3296 | case WLAN_CIPHER_SUITE_WEP104: | |
3297 | case WLAN_CIPHER_SUITE_TKIP: | |
3f64b435 | 3298 | break; |
97359d12 | 3299 | case WLAN_CIPHER_SUITE_CCMP: |
781f3136 | 3300 | if (common->crypt_caps & ATH_CRYPT_CAP_CIPHER_AESCCM) |
1c818740 | 3301 | break; |
fa1c114f JS |
3302 | return -EOPNOTSUPP; |
3303 | default: | |
3304 | WARN_ON(1); | |
3305 | return -EINVAL; | |
3306 | } | |
3307 | ||
3308 | mutex_lock(&sc->lock); | |
3309 | ||
3310 | switch (cmd) { | |
3311 | case SET_KEY: | |
e0f8c2a9 BR |
3312 | ret = ath_key_config(common, vif, sta, key); |
3313 | if (ret >= 0) { | |
3314 | key->hw_key_idx = ret; | |
3315 | /* push IV and Michael MIC generation to stack */ | |
3316 | key->flags |= IEEE80211_KEY_FLAG_GENERATE_IV; | |
3317 | if (key->cipher == WLAN_CIPHER_SUITE_TKIP) | |
3318 | key->flags |= IEEE80211_KEY_FLAG_GENERATE_MMIC; | |
3319 | if (key->cipher == WLAN_CIPHER_SUITE_CCMP) | |
3320 | key->flags |= IEEE80211_KEY_FLAG_SW_MGMT; | |
3321 | ret = 0; | |
fa1c114f | 3322 | } |
fa1c114f JS |
3323 | break; |
3324 | case DISABLE_KEY: | |
e0f8c2a9 | 3325 | ath_key_delete(common, key); |
fa1c114f JS |
3326 | break; |
3327 | default: | |
3328 | ret = -EINVAL; | |
fa1c114f JS |
3329 | } |
3330 | ||
8a63facc BC |
3331 | mmiowb(); |
3332 | mutex_unlock(&sc->lock); | |
3333 | return ret; | |
3334 | } | |
3335 | ||
3336 | static int | |
3337 | ath5k_get_stats(struct ieee80211_hw *hw, | |
3338 | struct ieee80211_low_level_stats *stats) | |
3339 | { | |
3340 | struct ath5k_softc *sc = hw->priv; | |
3341 | ||
3342 | /* Force update */ | |
3343 | ath5k_hw_update_mib_counters(sc->ah); | |
3344 | ||
3345 | stats->dot11ACKFailureCount = sc->stats.ack_fail; | |
3346 | stats->dot11RTSFailureCount = sc->stats.rts_fail; | |
3347 | stats->dot11RTSSuccessCount = sc->stats.rts_ok; | |
3348 | stats->dot11FCSErrorCount = sc->stats.fcs_error; | |
3349 | ||
3350 | return 0; | |
3351 | } | |
3352 | ||
3353 | static int ath5k_get_survey(struct ieee80211_hw *hw, int idx, | |
3354 | struct survey_info *survey) | |
3355 | { | |
3356 | struct ath5k_softc *sc = hw->priv; | |
3357 | struct ieee80211_conf *conf = &hw->conf; | |
edb40a23 BR |
3358 | struct ath_common *common = ath5k_hw_common(sc->ah); |
3359 | struct ath_cycle_counters *cc = &common->cc_survey; | |
3360 | unsigned int div = common->clockrate * 1000; | |
8a63facc | 3361 | |
edb40a23 | 3362 | if (idx != 0) |
8a63facc BC |
3363 | return -ENOENT; |
3364 | ||
3365 | survey->channel = conf->channel; | |
3366 | survey->filled = SURVEY_INFO_NOISE_DBM; | |
3367 | survey->noise = sc->ah->ah_noise_floor; | |
3368 | ||
edb40a23 BR |
3369 | spin_lock_bh(&common->cc_lock); |
3370 | ath_hw_cycle_counters_update(common); | |
3371 | if (cc->cycles > 0) { | |
3372 | survey->filled |= SURVEY_INFO_CHANNEL_TIME | | |
3373 | SURVEY_INFO_CHANNEL_TIME_BUSY | | |
3374 | SURVEY_INFO_CHANNEL_TIME_RX | | |
3375 | SURVEY_INFO_CHANNEL_TIME_TX; | |
3376 | survey->channel_time += cc->cycles / div; | |
3377 | survey->channel_time_busy += cc->rx_busy / div; | |
3378 | survey->channel_time_rx += cc->rx_frame / div; | |
3379 | survey->channel_time_tx += cc->tx_frame / div; | |
3380 | } | |
3381 | memset(cc, 0, sizeof(*cc)); | |
3382 | spin_unlock_bh(&common->cc_lock); | |
3383 | ||
8a63facc BC |
3384 | return 0; |
3385 | } | |
3386 | ||
3387 | static u64 | |
3388 | ath5k_get_tsf(struct ieee80211_hw *hw) | |
3389 | { | |
3390 | struct ath5k_softc *sc = hw->priv; | |
3391 | ||
3392 | return ath5k_hw_get_tsf64(sc->ah); | |
3393 | } | |
3394 | ||
3395 | static void | |
3396 | ath5k_set_tsf(struct ieee80211_hw *hw, u64 tsf) | |
3397 | { | |
3398 | struct ath5k_softc *sc = hw->priv; | |
3399 | ||
3400 | ath5k_hw_set_tsf64(sc->ah, tsf); | |
3401 | } | |
3402 | ||
3403 | static void | |
3404 | ath5k_reset_tsf(struct ieee80211_hw *hw) | |
3405 | { | |
3406 | struct ath5k_softc *sc = hw->priv; | |
3407 | ||
3408 | /* | |
3409 | * in IBSS mode we need to update the beacon timers too. | |
3410 | * this will also reset the TSF if we call it with 0 | |
3411 | */ | |
3412 | if (sc->opmode == NL80211_IFTYPE_ADHOC) | |
3413 | ath5k_beacon_update_timers(sc, 0); | |
3414 | else | |
3415 | ath5k_hw_reset_tsf(sc->ah); | |
3416 | } | |
3417 | ||
3418 | static void | |
3419 | set_beacon_filter(struct ieee80211_hw *hw, bool enable) | |
3420 | { | |
3421 | struct ath5k_softc *sc = hw->priv; | |
3422 | struct ath5k_hw *ah = sc->ah; | |
3423 | u32 rfilt; | |
3424 | rfilt = ath5k_hw_get_rx_filter(ah); | |
3425 | if (enable) | |
3426 | rfilt |= AR5K_RX_FILTER_BEACON; | |
3427 | else | |
3428 | rfilt &= ~AR5K_RX_FILTER_BEACON; | |
3429 | ath5k_hw_set_rx_filter(ah, rfilt); | |
3430 | sc->filter_flags = rfilt; | |
3431 | } | |
3432 | ||
3433 | static void ath5k_bss_info_changed(struct ieee80211_hw *hw, | |
3434 | struct ieee80211_vif *vif, | |
3435 | struct ieee80211_bss_conf *bss_conf, | |
3436 | u32 changes) | |
3437 | { | |
b1ae1edf | 3438 | struct ath5k_vif *avf = (void *)vif->drv_priv; |
8a63facc BC |
3439 | struct ath5k_softc *sc = hw->priv; |
3440 | struct ath5k_hw *ah = sc->ah; | |
3441 | struct ath_common *common = ath5k_hw_common(ah); | |
3442 | unsigned long flags; | |
3443 | ||
3444 | mutex_lock(&sc->lock); | |
8a63facc BC |
3445 | |
3446 | if (changes & BSS_CHANGED_BSSID) { | |
3447 | /* Cache for later use during resets */ | |
3448 | memcpy(common->curbssid, bss_conf->bssid, ETH_ALEN); | |
3449 | common->curaid = 0; | |
3450 | ath5k_hw_set_bssid(ah); | |
3451 | mmiowb(); | |
3452 | } | |
3453 | ||
3454 | if (changes & BSS_CHANGED_BEACON_INT) | |
3455 | sc->bintval = bss_conf->beacon_int; | |
3456 | ||
3457 | if (changes & BSS_CHANGED_ASSOC) { | |
b1ae1edf BG |
3458 | avf->assoc = bss_conf->assoc; |
3459 | if (bss_conf->assoc) | |
3460 | sc->assoc = bss_conf->assoc; | |
3461 | else | |
3462 | sc->assoc = ath_any_vif_assoc(sc); | |
3463 | ||
8a63facc BC |
3464 | if (sc->opmode == NL80211_IFTYPE_STATION) |
3465 | set_beacon_filter(hw, sc->assoc); | |
3466 | ath5k_hw_set_ledstate(sc->ah, sc->assoc ? | |
3467 | AR5K_LED_ASSOC : AR5K_LED_INIT); | |
3468 | if (bss_conf->assoc) { | |
3469 | ATH5K_DBG(sc, ATH5K_DEBUG_ANY, | |
3470 | "Bss Info ASSOC %d, bssid: %pM\n", | |
3471 | bss_conf->aid, common->curbssid); | |
3472 | common->curaid = bss_conf->aid; | |
3473 | ath5k_hw_set_bssid(ah); | |
3474 | /* Once ANI is available you would start it here */ | |
3475 | } | |
3476 | } | |
3477 | ||
3478 | if (changes & BSS_CHANGED_BEACON) { | |
3479 | spin_lock_irqsave(&sc->block, flags); | |
3480 | ath5k_beacon_update(hw, vif); | |
3481 | spin_unlock_irqrestore(&sc->block, flags); | |
3482 | } | |
3483 | ||
3484 | if (changes & BSS_CHANGED_BEACON_ENABLED) | |
3485 | sc->enable_beacon = bss_conf->enable_beacon; | |
3486 | ||
3487 | if (changes & (BSS_CHANGED_BEACON | BSS_CHANGED_BEACON_ENABLED | | |
3488 | BSS_CHANGED_BEACON_INT)) | |
3489 | ath5k_beacon_config(sc); | |
3490 | ||
8a63facc BC |
3491 | mutex_unlock(&sc->lock); |
3492 | } | |
3493 | ||
3494 | static void ath5k_sw_scan_start(struct ieee80211_hw *hw) | |
3495 | { | |
3496 | struct ath5k_softc *sc = hw->priv; | |
3497 | if (!sc->assoc) | |
3498 | ath5k_hw_set_ledstate(sc->ah, AR5K_LED_SCAN); | |
3499 | } | |
3500 | ||
3501 | static void ath5k_sw_scan_complete(struct ieee80211_hw *hw) | |
3502 | { | |
3503 | struct ath5k_softc *sc = hw->priv; | |
3504 | ath5k_hw_set_ledstate(sc->ah, sc->assoc ? | |
3505 | AR5K_LED_ASSOC : AR5K_LED_INIT); | |
3506 | } | |
3507 | ||
3508 | /** | |
3509 | * ath5k_set_coverage_class - Set IEEE 802.11 coverage class | |
3510 | * | |
3511 | * @hw: struct ieee80211_hw pointer | |
3512 | * @coverage_class: IEEE 802.11 coverage class number | |
3513 | * | |
3514 | * Mac80211 callback. Sets slot time, ACK timeout and CTS timeout for given | |
3515 | * coverage class. The values are persistent, they are restored after device | |
3516 | * reset. | |
3517 | */ | |
3518 | static void ath5k_set_coverage_class(struct ieee80211_hw *hw, u8 coverage_class) | |
3519 | { | |
3520 | struct ath5k_softc *sc = hw->priv; | |
3521 | ||
3522 | mutex_lock(&sc->lock); | |
3523 | ath5k_hw_set_coverage_class(sc->ah, coverage_class); | |
3524 | mutex_unlock(&sc->lock); | |
3525 | } | |
3526 | ||
e0b1cc52 BR |
3527 | static int ath5k_conf_tx(struct ieee80211_hw *hw, u16 queue, |
3528 | const struct ieee80211_tx_queue_params *params) | |
3529 | { | |
3530 | struct ath5k_softc *sc = hw->priv; | |
3531 | struct ath5k_hw *ah = sc->ah; | |
3532 | struct ath5k_txq_info qi; | |
3533 | int ret = 0; | |
3534 | ||
3535 | if (queue >= ah->ah_capabilities.cap_queues.q_tx_num) | |
3536 | return 0; | |
3537 | ||
3538 | mutex_lock(&sc->lock); | |
3539 | ||
3540 | ath5k_hw_get_tx_queueprops(ah, queue, &qi); | |
3541 | ||
3542 | qi.tqi_aifs = params->aifs; | |
3543 | qi.tqi_cw_min = params->cw_min; | |
3544 | qi.tqi_cw_max = params->cw_max; | |
3545 | qi.tqi_burst_time = params->txop; | |
3546 | ||
3547 | ATH5K_DBG(sc, ATH5K_DEBUG_ANY, | |
3548 | "Configure tx [queue %d], " | |
3549 | "aifs: %d, cw_min: %d, cw_max: %d, txop: %d\n", | |
3550 | queue, params->aifs, params->cw_min, | |
3551 | params->cw_max, params->txop); | |
3552 | ||
3553 | if (ath5k_hw_set_tx_queueprops(ah, queue, &qi)) { | |
3554 | ATH5K_ERR(sc, | |
3555 | "Unable to update hardware queue %u!\n", queue); | |
3556 | ret = -EIO; | |
3557 | } else | |
3558 | ath5k_hw_reset_tx_queue(ah, queue); | |
3559 | ||
3560 | mutex_unlock(&sc->lock); | |
3561 | ||
3562 | return ret; | |
3563 | } | |
3564 | ||
72a80110 BR |
3565 | static int ath5k_set_antenna(struct ieee80211_hw *hw, u32 tx_ant, u32 rx_ant) |
3566 | { | |
3567 | struct ath5k_softc *sc = hw->priv; | |
3568 | ||
3569 | if (tx_ant == 1 && rx_ant == 1) | |
3570 | ath5k_hw_set_antenna_mode(sc->ah, AR5K_ANTMODE_FIXED_A); | |
3571 | else if (tx_ant == 2 && rx_ant == 2) | |
3572 | ath5k_hw_set_antenna_mode(sc->ah, AR5K_ANTMODE_FIXED_B); | |
3573 | else if ((tx_ant & 3) == 3 && (rx_ant & 3) == 3) | |
3574 | ath5k_hw_set_antenna_mode(sc->ah, AR5K_ANTMODE_DEFAULT); | |
3575 | else | |
3576 | return -EINVAL; | |
3577 | return 0; | |
3578 | } | |
3579 | ||
3580 | static int ath5k_get_antenna(struct ieee80211_hw *hw, u32 *tx_ant, u32 *rx_ant) | |
3581 | { | |
3582 | struct ath5k_softc *sc = hw->priv; | |
3583 | ||
3584 | switch (sc->ah->ah_ant_mode) { | |
3585 | case AR5K_ANTMODE_FIXED_A: | |
3586 | *tx_ant = 1; *rx_ant = 1; break; | |
3587 | case AR5K_ANTMODE_FIXED_B: | |
3588 | *tx_ant = 2; *rx_ant = 2; break; | |
3589 | case AR5K_ANTMODE_DEFAULT: | |
3590 | *tx_ant = 3; *rx_ant = 3; break; | |
3591 | } | |
3592 | return 0; | |
3593 | } | |
3594 | ||
132b1c3e | 3595 | const struct ieee80211_ops ath5k_hw_ops = { |
8a63facc BC |
3596 | .tx = ath5k_tx, |
3597 | .start = ath5k_start, | |
3598 | .stop = ath5k_stop, | |
3599 | .add_interface = ath5k_add_interface, | |
3600 | .remove_interface = ath5k_remove_interface, | |
3601 | .config = ath5k_config, | |
3602 | .prepare_multicast = ath5k_prepare_multicast, | |
3603 | .configure_filter = ath5k_configure_filter, | |
3604 | .set_key = ath5k_set_key, | |
3605 | .get_stats = ath5k_get_stats, | |
3606 | .get_survey = ath5k_get_survey, | |
e0b1cc52 | 3607 | .conf_tx = ath5k_conf_tx, |
8a63facc BC |
3608 | .get_tsf = ath5k_get_tsf, |
3609 | .set_tsf = ath5k_set_tsf, | |
3610 | .reset_tsf = ath5k_reset_tsf, | |
3611 | .bss_info_changed = ath5k_bss_info_changed, | |
3612 | .sw_scan_start = ath5k_sw_scan_start, | |
3613 | .sw_scan_complete = ath5k_sw_scan_complete, | |
3614 | .set_coverage_class = ath5k_set_coverage_class, | |
72a80110 BR |
3615 | .set_antenna = ath5k_set_antenna, |
3616 | .get_antenna = ath5k_get_antenna, | |
8a63facc | 3617 | }; |