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a55360e4 TW |
1 | /****************************************************************************** |
2 | * | |
51368bf7 | 3 | * Copyright(c) 2003 - 2014 Intel Corporation. All rights reserved. |
39bdb17e | 4 | * Copyright(c) 2015 Intel Deutschland GmbH |
a55360e4 TW |
5 | * |
6 | * Portions of this file are derived from the ipw3945 project, as well | |
6a686c60 | 7 | * as portionhelp of the ieee80211 subsystem header files. |
a55360e4 TW |
8 | * |
9 | * This program is free software; you can redistribute it and/or modify it | |
10 | * under the terms of version 2 of the GNU General Public License as | |
11 | * published by the Free Software Foundation. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, but WITHOUT | |
14 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
15 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
16 | * more details. | |
17 | * | |
18 | * You should have received a copy of the GNU General Public License along with | |
19 | * this program; if not, write to the Free Software Foundation, Inc., | |
20 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA | |
21 | * | |
22 | * The full GNU General Public License is included in this distribution in the | |
23 | * file called LICENSE. | |
24 | * | |
25 | * Contact Information: | |
cb2f8277 | 26 | * Intel Linux Wireless <linuxwifi@intel.com> |
a55360e4 TW |
27 | * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 |
28 | * | |
29 | *****************************************************************************/ | |
30 | ||
1781a07f | 31 | #include <linux/etherdevice.h> |
5a0e3ad6 | 32 | #include <linux/slab.h> |
118253ca | 33 | #include <linux/sched.h> |
a55360e4 | 34 | #include <net/mac80211.h> |
a05ffd39 | 35 | #include <asm/unaligned.h> |
39bdb17e SD |
36 | |
37 | #include "iwl-trans.h" | |
a55360e4 | 38 | #include "iwl-io.h" |
1023fdc4 JB |
39 | #include "dev.h" |
40 | #include "calib.h" | |
41 | #include "agn.h" | |
466a19a0 | 42 | |
466a19a0 SG |
43 | /****************************************************************************** |
44 | * | |
45 | * Generic RX handler implementations | |
46 | * | |
47 | ******************************************************************************/ | |
48 | ||
73e686f3 JB |
49 | static void iwlagn_rx_reply_error(struct iwl_priv *priv, |
50 | struct iwl_rx_cmd_buffer *rxb) | |
466a19a0 SG |
51 | { |
52 | struct iwl_rx_packet *pkt = rxb_addr(rxb); | |
f8d7c1a1 | 53 | struct iwl_error_resp *err_resp = (void *)pkt->data; |
466a19a0 | 54 | |
d9fb6465 | 55 | IWL_ERR(priv, "Error Reply type 0x%08X cmd REPLY_ERROR (0x%02X) " |
466a19a0 | 56 | "seq 0x%04X ser 0x%08X\n", |
f8d7c1a1 | 57 | le32_to_cpu(err_resp->error_type), |
f8d7c1a1 JB |
58 | err_resp->cmd_id, |
59 | le16_to_cpu(err_resp->bad_cmd_seq_num), | |
60 | le32_to_cpu(err_resp->error_info)); | |
466a19a0 SG |
61 | } |
62 | ||
73e686f3 | 63 | static void iwlagn_rx_csa(struct iwl_priv *priv, struct iwl_rx_cmd_buffer *rxb) |
466a19a0 SG |
64 | { |
65 | struct iwl_rx_packet *pkt = rxb_addr(rxb); | |
f8d7c1a1 | 66 | struct iwl_csa_notification *csa = (void *)pkt->data; |
466a19a0 SG |
67 | /* |
68 | * MULTI-FIXME | |
ade4c649 | 69 | * See iwlagn_mac_channel_switch. |
466a19a0 SG |
70 | */ |
71 | struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS]; | |
72 | struct iwl_rxon_cmd *rxon = (void *)&ctx->active; | |
73 | ||
83626404 | 74 | if (!test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status)) |
73e686f3 | 75 | return; |
6f213ff1 SG |
76 | |
77 | if (!le32_to_cpu(csa->status) && csa->channel == priv->switch_channel) { | |
78 | rxon->channel = csa->channel; | |
79 | ctx->staging.channel = csa->channel; | |
80 | IWL_DEBUG_11H(priv, "CSA notif: channel %d\n", | |
466a19a0 | 81 | le16_to_cpu(csa->channel)); |
6f213ff1 SG |
82 | iwl_chswitch_done(priv, true); |
83 | } else { | |
84 | IWL_ERR(priv, "CSA notif (fail) : channel %d\n", | |
85 | le16_to_cpu(csa->channel)); | |
86 | iwl_chswitch_done(priv, false); | |
466a19a0 SG |
87 | } |
88 | } | |
89 | ||
90 | ||
73e686f3 JB |
91 | static void iwlagn_rx_spectrum_measure_notif(struct iwl_priv *priv, |
92 | struct iwl_rx_cmd_buffer *rxb) | |
81963d68 RC |
93 | { |
94 | struct iwl_rx_packet *pkt = rxb_addr(rxb); | |
f8d7c1a1 | 95 | struct iwl_spectrum_notification *report = (void *)pkt->data; |
81963d68 RC |
96 | |
97 | if (!report->state) { | |
98 | IWL_DEBUG_11H(priv, | |
99 | "Spectrum Measure Notification: Start\n"); | |
73e686f3 | 100 | return; |
81963d68 RC |
101 | } |
102 | ||
103 | memcpy(&priv->measure_report, report, sizeof(*report)); | |
104 | priv->measurement_status |= MEASUREMENT_READY; | |
105 | } | |
81963d68 | 106 | |
73e686f3 JB |
107 | static void iwlagn_rx_pm_sleep_notif(struct iwl_priv *priv, |
108 | struct iwl_rx_cmd_buffer *rxb) | |
466a19a0 SG |
109 | { |
110 | #ifdef CONFIG_IWLWIFI_DEBUG | |
111 | struct iwl_rx_packet *pkt = rxb_addr(rxb); | |
f8d7c1a1 | 112 | struct iwl_sleep_notification *sleep = (void *)pkt->data; |
466a19a0 SG |
113 | IWL_DEBUG_RX(priv, "sleep mode: %d, src: %d\n", |
114 | sleep->pm_sleep_mode, sleep->pm_wakeup_src); | |
115 | #endif | |
116 | } | |
117 | ||
73e686f3 JB |
118 | static void iwlagn_rx_pm_debug_statistics_notif(struct iwl_priv *priv, |
119 | struct iwl_rx_cmd_buffer *rxb) | |
466a19a0 SG |
120 | { |
121 | struct iwl_rx_packet *pkt = rxb_addr(rxb); | |
65b30348 | 122 | u32 __maybe_unused len = iwl_rx_packet_len(pkt); |
466a19a0 | 123 | IWL_DEBUG_RADIO(priv, "Dumping %d bytes of unhandled " |
d9fb6465 | 124 | "notification for PM_DEBUG_STATISTIC_NOTIFIC:\n", len); |
f8d7c1a1 | 125 | iwl_print_hex_dump(priv, IWL_DL_RADIO, pkt->data, len); |
466a19a0 SG |
126 | } |
127 | ||
73e686f3 JB |
128 | static void iwlagn_rx_beacon_notif(struct iwl_priv *priv, |
129 | struct iwl_rx_cmd_buffer *rxb) | |
466a19a0 SG |
130 | { |
131 | struct iwl_rx_packet *pkt = rxb_addr(rxb); | |
f8d7c1a1 | 132 | struct iwlagn_beacon_notif *beacon = (void *)pkt->data; |
466a19a0 SG |
133 | #ifdef CONFIG_IWLWIFI_DEBUG |
134 | u16 status = le16_to_cpu(beacon->beacon_notify_hdr.status.status); | |
135 | u8 rate = iwl_hw_get_rate(beacon->beacon_notify_hdr.rate_n_flags); | |
136 | ||
137 | IWL_DEBUG_RX(priv, "beacon status %#x, retries:%d ibssmgr:%d " | |
138 | "tsf:0x%.8x%.8x rate:%d\n", | |
139 | status & TX_STATUS_MSK, | |
140 | beacon->beacon_notify_hdr.failure_frame, | |
141 | le32_to_cpu(beacon->ibss_mgr_status), | |
142 | le32_to_cpu(beacon->high_tsf), | |
143 | le32_to_cpu(beacon->low_tsf), rate); | |
144 | #endif | |
145 | ||
146 | priv->ibss_manager = le32_to_cpu(beacon->ibss_mgr_status); | |
466a19a0 SG |
147 | } |
148 | ||
ad6e82a5 SG |
149 | /** |
150 | * iwl_good_plcp_health - checks for plcp error. | |
151 | * | |
152 | * When the plcp error is exceeding the thresholds, reset the radio | |
153 | * to improve the throughput. | |
154 | */ | |
3246c4e6 | 155 | static bool iwlagn_good_plcp_health(struct iwl_priv *priv, |
0da0e5bf JB |
156 | struct statistics_rx_phy *cur_ofdm, |
157 | struct statistics_rx_ht_phy *cur_ofdm_ht, | |
158 | unsigned int msecs) | |
ad6e82a5 | 159 | { |
6198c387 | 160 | int delta; |
ab5c0f1f | 161 | int threshold = priv->plcp_delta_threshold; |
ad6e82a5 | 162 | |
6198c387 | 163 | if (threshold == IWL_MAX_PLCP_ERR_THRESHOLD_DISABLE) { |
ad6e82a5 | 164 | IWL_DEBUG_RADIO(priv, "plcp_err check disabled\n"); |
6198c387 | 165 | return true; |
ad6e82a5 SG |
166 | } |
167 | ||
0da0e5bf JB |
168 | delta = le32_to_cpu(cur_ofdm->plcp_err) - |
169 | le32_to_cpu(priv->statistics.rx_ofdm.plcp_err) + | |
170 | le32_to_cpu(cur_ofdm_ht->plcp_err) - | |
171 | le32_to_cpu(priv->statistics.rx_ofdm_ht.plcp_err); | |
6198c387 | 172 | |
0da0e5bf | 173 | /* Can be negative if firmware reset statistics */ |
6198c387 SG |
174 | if (delta <= 0) |
175 | return true; | |
176 | ||
177 | if ((delta * 100 / msecs) > threshold) { | |
178 | IWL_DEBUG_RADIO(priv, | |
179 | "plcp health threshold %u delta %d msecs %u\n", | |
180 | threshold, delta, msecs); | |
181 | return false; | |
182 | } | |
183 | ||
184 | return true; | |
ad6e82a5 SG |
185 | } |
186 | ||
66cd9e39 MV |
187 | int iwl_force_rf_reset(struct iwl_priv *priv, bool external) |
188 | { | |
189 | struct iwl_rf_reset *rf_reset; | |
190 | ||
191 | if (test_bit(STATUS_EXIT_PENDING, &priv->status)) | |
192 | return -EAGAIN; | |
193 | ||
194 | if (!iwl_is_any_associated(priv)) { | |
195 | IWL_DEBUG_SCAN(priv, "force reset rejected: not associated\n"); | |
196 | return -ENOLINK; | |
197 | } | |
198 | ||
199 | rf_reset = &priv->rf_reset; | |
200 | rf_reset->reset_request_count++; | |
201 | if (!external && rf_reset->last_reset_jiffies && | |
202 | time_after(rf_reset->last_reset_jiffies + | |
203 | IWL_DELAY_NEXT_FORCE_RF_RESET, jiffies)) { | |
204 | IWL_DEBUG_INFO(priv, "RF reset rejected\n"); | |
205 | rf_reset->reset_reject_count++; | |
206 | return -EAGAIN; | |
207 | } | |
208 | rf_reset->reset_success_count++; | |
209 | rf_reset->last_reset_jiffies = jiffies; | |
210 | ||
211 | /* | |
212 | * There is no easy and better way to force reset the radio, | |
213 | * the only known method is switching channel which will force to | |
214 | * reset and tune the radio. | |
215 | * Use internal short scan (single channel) operation to should | |
216 | * achieve this objective. | |
217 | * Driver should reset the radio when number of consecutive missed | |
218 | * beacon, or any other uCode error condition detected. | |
219 | */ | |
220 | IWL_DEBUG_INFO(priv, "perform radio reset.\n"); | |
221 | iwl_internal_short_hw_scan(priv); | |
222 | return 0; | |
223 | } | |
224 | ||
225 | ||
3246c4e6 WYG |
226 | static void iwlagn_recover_from_statistics(struct iwl_priv *priv, |
227 | struct statistics_rx_phy *cur_ofdm, | |
228 | struct statistics_rx_ht_phy *cur_ofdm_ht, | |
229 | struct statistics_tx *tx, | |
230 | unsigned long stamp) | |
fa8f130c | 231 | { |
410f2bb3 | 232 | unsigned int msecs; |
b7977ffa | 233 | |
83626404 | 234 | if (test_bit(STATUS_EXIT_PENDING, &priv->status)) |
410f2bb3 SG |
235 | return; |
236 | ||
410f2bb3 SG |
237 | msecs = jiffies_to_msecs(stamp - priv->rx_statistics_jiffies); |
238 | ||
239 | /* Only gather statistics and update time stamp when not associated */ | |
240 | if (!iwl_is_any_associated(priv)) | |
0da0e5bf | 241 | return; |
410f2bb3 SG |
242 | |
243 | /* Do not check/recover when do not have enough statistics data */ | |
244 | if (msecs < 99) | |
fa8f130c | 245 | return; |
ca3d9389 | 246 | |
8b5bf335 | 247 | if (!iwlagn_good_plcp_health(priv, cur_ofdm, cur_ofdm_ht, msecs)) |
48dffd39 | 248 | iwl_force_rf_reset(priv, false); |
beac5498 | 249 | } |
beac5498 | 250 | |
67289941 SG |
251 | /* Calculate noise level, based on measurements during network silence just |
252 | * before arriving beacon. This measurement can be done only if we know | |
253 | * exactly when to expect beacons, therefore only when we're associated. */ | |
3246c4e6 | 254 | static void iwlagn_rx_calc_noise(struct iwl_priv *priv) |
67289941 SG |
255 | { |
256 | struct statistics_rx_non_phy *rx_info; | |
257 | int num_active_rx = 0; | |
258 | int total_silence = 0; | |
259 | int bcn_silence_a, bcn_silence_b, bcn_silence_c; | |
260 | int last_rx_noise; | |
261 | ||
0da0e5bf JB |
262 | rx_info = &priv->statistics.rx_non_phy; |
263 | ||
67289941 SG |
264 | bcn_silence_a = |
265 | le32_to_cpu(rx_info->beacon_silence_rssi_a) & IN_BAND_FILTER; | |
266 | bcn_silence_b = | |
267 | le32_to_cpu(rx_info->beacon_silence_rssi_b) & IN_BAND_FILTER; | |
268 | bcn_silence_c = | |
269 | le32_to_cpu(rx_info->beacon_silence_rssi_c) & IN_BAND_FILTER; | |
270 | ||
271 | if (bcn_silence_a) { | |
272 | total_silence += bcn_silence_a; | |
273 | num_active_rx++; | |
274 | } | |
275 | if (bcn_silence_b) { | |
276 | total_silence += bcn_silence_b; | |
277 | num_active_rx++; | |
278 | } | |
279 | if (bcn_silence_c) { | |
280 | total_silence += bcn_silence_c; | |
281 | num_active_rx++; | |
282 | } | |
283 | ||
284 | /* Average among active antennas */ | |
285 | if (num_active_rx) | |
286 | last_rx_noise = (total_silence / num_active_rx) - 107; | |
287 | else | |
288 | last_rx_noise = IWL_NOISE_MEAS_NOT_AVAILABLE; | |
289 | ||
290 | IWL_DEBUG_CALIB(priv, "inband silence a %u, b %u, c %u, dBm %d\n", | |
291 | bcn_silence_a, bcn_silence_b, bcn_silence_c, | |
292 | last_rx_noise); | |
293 | } | |
294 | ||
0da0e5bf | 295 | #ifdef CONFIG_IWLWIFI_DEBUGFS |
67289941 SG |
296 | /* |
297 | * based on the assumption of all statistics counter are in DWORD | |
298 | * FIXME: This function is for debugging, do not deal with | |
299 | * the case of counters roll-over. | |
300 | */ | |
0da0e5bf JB |
301 | static void accum_stats(__le32 *prev, __le32 *cur, __le32 *delta, |
302 | __le32 *max_delta, __le32 *accum, int size) | |
67289941 | 303 | { |
0da0e5bf JB |
304 | int i; |
305 | ||
306 | for (i = 0; | |
307 | i < size / sizeof(__le32); | |
308 | i++, prev++, cur++, delta++, max_delta++, accum++) { | |
309 | if (le32_to_cpu(*cur) > le32_to_cpu(*prev)) { | |
310 | *delta = cpu_to_le32( | |
311 | le32_to_cpu(*cur) - le32_to_cpu(*prev)); | |
312 | le32_add_cpu(accum, le32_to_cpu(*delta)); | |
313 | if (le32_to_cpu(*delta) > le32_to_cpu(*max_delta)) | |
67289941 SG |
314 | *max_delta = *delta; |
315 | } | |
316 | } | |
0da0e5bf | 317 | } |
67289941 | 318 | |
0da0e5bf | 319 | static void |
3246c4e6 | 320 | iwlagn_accumulative_statistics(struct iwl_priv *priv, |
0da0e5bf JB |
321 | struct statistics_general_common *common, |
322 | struct statistics_rx_non_phy *rx_non_phy, | |
323 | struct statistics_rx_phy *rx_ofdm, | |
324 | struct statistics_rx_ht_phy *rx_ofdm_ht, | |
325 | struct statistics_rx_phy *rx_cck, | |
326 | struct statistics_tx *tx, | |
327 | struct statistics_bt_activity *bt_activity) | |
328 | { | |
329 | #define ACCUM(_name) \ | |
330 | accum_stats((__le32 *)&priv->statistics._name, \ | |
331 | (__le32 *)_name, \ | |
332 | (__le32 *)&priv->delta_stats._name, \ | |
333 | (__le32 *)&priv->max_delta_stats._name, \ | |
334 | (__le32 *)&priv->accum_stats._name, \ | |
335 | sizeof(*_name)); | |
336 | ||
337 | ACCUM(common); | |
338 | ACCUM(rx_non_phy); | |
339 | ACCUM(rx_ofdm); | |
340 | ACCUM(rx_ofdm_ht); | |
341 | ACCUM(rx_cck); | |
342 | ACCUM(tx); | |
343 | if (bt_activity) | |
344 | ACCUM(bt_activity); | |
345 | #undef ACCUM | |
466a19a0 | 346 | } |
0da0e5bf JB |
347 | #else |
348 | static inline void | |
3246c4e6 | 349 | iwlagn_accumulative_statistics(struct iwl_priv *priv, |
0da0e5bf JB |
350 | struct statistics_general_common *common, |
351 | struct statistics_rx_non_phy *rx_non_phy, | |
352 | struct statistics_rx_phy *rx_ofdm, | |
353 | struct statistics_rx_ht_phy *rx_ofdm_ht, | |
354 | struct statistics_rx_phy *rx_cck, | |
355 | struct statistics_tx *tx, | |
356 | struct statistics_bt_activity *bt_activity) | |
357 | { | |
358 | } | |
359 | #endif | |
67289941 | 360 | |
73e686f3 JB |
361 | static void iwlagn_rx_statistics(struct iwl_priv *priv, |
362 | struct iwl_rx_cmd_buffer *rxb) | |
67289941 | 363 | { |
0da0e5bf | 364 | unsigned long stamp = jiffies; |
466a19a0 | 365 | const int reg_recalib_period = 60; |
67289941 SG |
366 | int change; |
367 | struct iwl_rx_packet *pkt = rxb_addr(rxb); | |
65b30348 | 368 | u32 len = iwl_rx_packet_payload_len(pkt); |
0da0e5bf JB |
369 | __le32 *flag; |
370 | struct statistics_general_common *common; | |
371 | struct statistics_rx_non_phy *rx_non_phy; | |
372 | struct statistics_rx_phy *rx_ofdm; | |
373 | struct statistics_rx_ht_phy *rx_ofdm_ht; | |
374 | struct statistics_rx_phy *rx_cck; | |
375 | struct statistics_tx *tx; | |
376 | struct statistics_bt_activity *bt_activity; | |
377 | ||
0da0e5bf JB |
378 | IWL_DEBUG_RX(priv, "Statistics notification received (%d bytes).\n", |
379 | len); | |
380 | ||
4ff70fcd JB |
381 | spin_lock(&priv->statistics.lock); |
382 | ||
0da0e5bf JB |
383 | if (len == sizeof(struct iwl_bt_notif_statistics)) { |
384 | struct iwl_bt_notif_statistics *stats; | |
f8d7c1a1 | 385 | stats = (void *)&pkt->data; |
0da0e5bf JB |
386 | flag = &stats->flag; |
387 | common = &stats->general.common; | |
388 | rx_non_phy = &stats->rx.general.common; | |
389 | rx_ofdm = &stats->rx.ofdm; | |
390 | rx_ofdm_ht = &stats->rx.ofdm_ht; | |
391 | rx_cck = &stats->rx.cck; | |
392 | tx = &stats->tx; | |
393 | bt_activity = &stats->general.activity; | |
67289941 | 394 | |
0da0e5bf JB |
395 | #ifdef CONFIG_IWLWIFI_DEBUGFS |
396 | /* handle this exception directly */ | |
397 | priv->statistics.num_bt_kills = stats->rx.general.num_bt_kills; | |
398 | le32_add_cpu(&priv->statistics.accum_num_bt_kills, | |
399 | le32_to_cpu(stats->rx.general.num_bt_kills)); | |
400 | #endif | |
401 | } else if (len == sizeof(struct iwl_notif_statistics)) { | |
402 | struct iwl_notif_statistics *stats; | |
f8d7c1a1 | 403 | stats = (void *)&pkt->data; |
0da0e5bf JB |
404 | flag = &stats->flag; |
405 | common = &stats->general.common; | |
406 | rx_non_phy = &stats->rx.general; | |
407 | rx_ofdm = &stats->rx.ofdm; | |
408 | rx_ofdm_ht = &stats->rx.ofdm_ht; | |
409 | rx_cck = &stats->rx.cck; | |
410 | tx = &stats->tx; | |
411 | bt_activity = NULL; | |
67289941 | 412 | } else { |
0da0e5bf JB |
413 | WARN_ONCE(1, "len %d doesn't match BT (%zu) or normal (%zu)\n", |
414 | len, sizeof(struct iwl_bt_notif_statistics), | |
415 | sizeof(struct iwl_notif_statistics)); | |
4ff70fcd | 416 | spin_unlock(&priv->statistics.lock); |
73e686f3 | 417 | return; |
67289941 SG |
418 | } |
419 | ||
0da0e5bf JB |
420 | change = common->temperature != priv->statistics.common.temperature || |
421 | (*flag & STATISTICS_REPLY_FLG_HT40_MODE_MSK) != | |
422 | (priv->statistics.flag & STATISTICS_REPLY_FLG_HT40_MODE_MSK); | |
423 | ||
3246c4e6 | 424 | iwlagn_accumulative_statistics(priv, common, rx_non_phy, rx_ofdm, |
0da0e5bf JB |
425 | rx_ofdm_ht, rx_cck, tx, bt_activity); |
426 | ||
3246c4e6 | 427 | iwlagn_recover_from_statistics(priv, rx_ofdm, rx_ofdm_ht, tx, stamp); |
0da0e5bf JB |
428 | |
429 | priv->statistics.flag = *flag; | |
430 | memcpy(&priv->statistics.common, common, sizeof(*common)); | |
431 | memcpy(&priv->statistics.rx_non_phy, rx_non_phy, sizeof(*rx_non_phy)); | |
432 | memcpy(&priv->statistics.rx_ofdm, rx_ofdm, sizeof(*rx_ofdm)); | |
433 | memcpy(&priv->statistics.rx_ofdm_ht, rx_ofdm_ht, sizeof(*rx_ofdm_ht)); | |
434 | memcpy(&priv->statistics.rx_cck, rx_cck, sizeof(*rx_cck)); | |
435 | memcpy(&priv->statistics.tx, tx, sizeof(*tx)); | |
436 | #ifdef CONFIG_IWLWIFI_DEBUGFS | |
437 | if (bt_activity) | |
438 | memcpy(&priv->statistics.bt_activity, bt_activity, | |
439 | sizeof(*bt_activity)); | |
440 | #endif | |
441 | ||
442 | priv->rx_statistics_jiffies = stamp; | |
67289941 | 443 | |
83626404 | 444 | set_bit(STATUS_STATISTICS, &priv->status); |
67289941 SG |
445 | |
446 | /* Reschedule the statistics timer to occur in | |
466a19a0 | 447 | * reg_recalib_period seconds to ensure we get a |
67289941 SG |
448 | * thermal update even if the uCode doesn't give |
449 | * us one */ | |
450 | mod_timer(&priv->statistics_periodic, jiffies + | |
466a19a0 | 451 | msecs_to_jiffies(reg_recalib_period * 1000)); |
67289941 | 452 | |
83626404 | 453 | if (unlikely(!test_bit(STATUS_SCANNING, &priv->status)) && |
67289941 | 454 | (pkt->hdr.cmd == STATISTICS_NOTIFICATION)) { |
3246c4e6 | 455 | iwlagn_rx_calc_noise(priv); |
1ee158d8 | 456 | queue_work(priv->workqueue, &priv->run_time_calib_work); |
67289941 | 457 | } |
e9676695 JB |
458 | if (priv->lib->temperature && change) |
459 | priv->lib->temperature(priv); | |
4ff70fcd JB |
460 | |
461 | spin_unlock(&priv->statistics.lock); | |
67289941 SG |
462 | } |
463 | ||
73e686f3 JB |
464 | static void iwlagn_rx_reply_statistics(struct iwl_priv *priv, |
465 | struct iwl_rx_cmd_buffer *rxb) | |
67289941 SG |
466 | { |
467 | struct iwl_rx_packet *pkt = rxb_addr(rxb); | |
f8d7c1a1 | 468 | struct iwl_notif_statistics *stats = (void *)pkt->data; |
67289941 | 469 | |
f8d7c1a1 | 470 | if (le32_to_cpu(stats->flag) & UCODE_STATISTICS_CLEAR_MSK) { |
67289941 | 471 | #ifdef CONFIG_IWLWIFI_DEBUGFS |
0da0e5bf JB |
472 | memset(&priv->accum_stats, 0, |
473 | sizeof(priv->accum_stats)); | |
474 | memset(&priv->delta_stats, 0, | |
475 | sizeof(priv->delta_stats)); | |
476 | memset(&priv->max_delta_stats, 0, | |
477 | sizeof(priv->max_delta_stats)); | |
67289941 SG |
478 | #endif |
479 | IWL_DEBUG_RX(priv, "Statistics have been cleared\n"); | |
480 | } | |
73e686f3 JB |
481 | |
482 | iwlagn_rx_statistics(priv, rxb); | |
67289941 SG |
483 | } |
484 | ||
466a19a0 SG |
485 | /* Handle notification from uCode that card's power state is changing |
486 | * due to software, hardware, or critical temperature RFKILL */ | |
73e686f3 JB |
487 | static void iwlagn_rx_card_state_notif(struct iwl_priv *priv, |
488 | struct iwl_rx_cmd_buffer *rxb) | |
466a19a0 SG |
489 | { |
490 | struct iwl_rx_packet *pkt = rxb_addr(rxb); | |
f8d7c1a1 JB |
491 | struct iwl_card_state_notif *card_state_notif = (void *)pkt->data; |
492 | u32 flags = le32_to_cpu(card_state_notif->flags); | |
1353a7ba | 493 | unsigned long status = priv->status; |
466a19a0 SG |
494 | |
495 | IWL_DEBUG_RF_KILL(priv, "Card state received: HW:%s SW:%s CT:%s\n", | |
496 | (flags & HW_CARD_DISABLED) ? "Kill" : "On", | |
497 | (flags & SW_CARD_DISABLED) ? "Kill" : "On", | |
498 | (flags & CT_CARD_DISABLED) ? | |
499 | "Reached" : "Not reached"); | |
500 | ||
501 | if (flags & (SW_CARD_DISABLED | HW_CARD_DISABLED | | |
502 | CT_CARD_DISABLED)) { | |
503 | ||
68e8dfda | 504 | iwl_write32(priv->trans, CSR_UCODE_DRV_GP1_SET, |
466a19a0 SG |
505 | CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED); |
506 | ||
68e8dfda | 507 | iwl_write_direct32(priv->trans, HBUS_TARG_MBX_C, |
466a19a0 SG |
508 | HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED); |
509 | ||
510 | if (!(flags & RXON_CARD_DISABLED)) { | |
68e8dfda | 511 | iwl_write32(priv->trans, CSR_UCODE_DRV_GP1_CLR, |
466a19a0 | 512 | CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED); |
68e8dfda | 513 | iwl_write_direct32(priv->trans, HBUS_TARG_MBX_C, |
466a19a0 SG |
514 | HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED); |
515 | } | |
516 | if (flags & CT_CARD_DISABLED) | |
517 | iwl_tt_enter_ct_kill(priv); | |
518 | } | |
519 | if (!(flags & CT_CARD_DISABLED)) | |
520 | iwl_tt_exit_ct_kill(priv); | |
521 | ||
522 | if (flags & HW_CARD_DISABLED) | |
83626404 | 523 | set_bit(STATUS_RF_KILL_HW, &priv->status); |
466a19a0 | 524 | else |
83626404 | 525 | clear_bit(STATUS_RF_KILL_HW, &priv->status); |
466a19a0 SG |
526 | |
527 | ||
528 | if (!(flags & RXON_CARD_DISABLED)) | |
529 | iwl_scan_cancel(priv); | |
530 | ||
531 | if ((test_bit(STATUS_RF_KILL_HW, &status) != | |
83626404 | 532 | test_bit(STATUS_RF_KILL_HW, &priv->status))) |
466a19a0 | 533 | wiphy_rfkill_set_hw_state(priv->hw->wiphy, |
83626404 | 534 | test_bit(STATUS_RF_KILL_HW, &priv->status)); |
466a19a0 SG |
535 | } |
536 | ||
73e686f3 JB |
537 | static void iwlagn_rx_missed_beacon_notif(struct iwl_priv *priv, |
538 | struct iwl_rx_cmd_buffer *rxb) | |
67289941 SG |
539 | |
540 | { | |
541 | struct iwl_rx_packet *pkt = rxb_addr(rxb); | |
f8d7c1a1 | 542 | struct iwl_missed_beacon_notif *missed_beacon = (void *)pkt->data; |
67289941 | 543 | |
67289941 SG |
544 | if (le32_to_cpu(missed_beacon->consecutive_missed_beacons) > |
545 | priv->missed_beacon_threshold) { | |
546 | IWL_DEBUG_CALIB(priv, | |
547 | "missed bcn cnsq %d totl %d rcd %d expctd %d\n", | |
548 | le32_to_cpu(missed_beacon->consecutive_missed_beacons), | |
549 | le32_to_cpu(missed_beacon->total_missed_becons), | |
550 | le32_to_cpu(missed_beacon->num_recvd_beacons), | |
551 | le32_to_cpu(missed_beacon->num_expected_beacons)); | |
83626404 | 552 | if (!test_bit(STATUS_SCANNING, &priv->status)) |
67289941 SG |
553 | iwl_init_sensitivity(priv); |
554 | } | |
555 | } | |
556 | ||
466a19a0 SG |
557 | /* Cache phy data (Rx signal strength, etc) for HT frame (REPLY_RX_PHY_CMD). |
558 | * This will be used later in iwl_rx_reply_rx() for REPLY_RX_MPDU_CMD. */ | |
73e686f3 JB |
559 | static void iwlagn_rx_reply_rx_phy(struct iwl_priv *priv, |
560 | struct iwl_rx_cmd_buffer *rxb) | |
466a19a0 SG |
561 | { |
562 | struct iwl_rx_packet *pkt = rxb_addr(rxb); | |
563 | ||
898ed67b | 564 | priv->last_phy_res_valid = true; |
12bf6f45 | 565 | priv->ampdu_ref++; |
f8d7c1a1 | 566 | memcpy(&priv->last_phy_res, pkt->data, |
466a19a0 SG |
567 | sizeof(struct iwl_rx_phy_res)); |
568 | } | |
569 | ||
1781a07f EG |
570 | /* |
571 | * returns non-zero if packet should be dropped | |
572 | */ | |
3246c4e6 | 573 | static int iwlagn_set_decrypted_flag(struct iwl_priv *priv, |
466a19a0 SG |
574 | struct ieee80211_hdr *hdr, |
575 | u32 decrypt_res, | |
576 | struct ieee80211_rx_status *stats) | |
1781a07f EG |
577 | { |
578 | u16 fc = le16_to_cpu(hdr->frame_control); | |
579 | ||
246ed355 JB |
580 | /* |
581 | * All contexts have the same setting here due to it being | |
582 | * a module parameter, so OK to check any context. | |
583 | */ | |
584 | if (priv->contexts[IWL_RXON_CTX_BSS].active.filter_flags & | |
585 | RXON_FILTER_DIS_DECRYPT_MSK) | |
1781a07f EG |
586 | return 0; |
587 | ||
588 | if (!(fc & IEEE80211_FCTL_PROTECTED)) | |
589 | return 0; | |
590 | ||
e1623446 | 591 | IWL_DEBUG_RX(priv, "decrypt_res:0x%x\n", decrypt_res); |
1781a07f EG |
592 | switch (decrypt_res & RX_RES_STATUS_SEC_TYPE_MSK) { |
593 | case RX_RES_STATUS_SEC_TYPE_TKIP: | |
594 | /* The uCode has got a bad phase 1 Key, pushes the packet. | |
595 | * Decryption will be done in SW. */ | |
596 | if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) == | |
597 | RX_RES_STATUS_BAD_KEY_TTAK) | |
598 | break; | |
599 | ||
600 | case RX_RES_STATUS_SEC_TYPE_WEP: | |
601 | if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) == | |
602 | RX_RES_STATUS_BAD_ICV_MIC) { | |
603 | /* bad ICV, the packet is destroyed since the | |
604 | * decryption is inplace, drop it */ | |
e1623446 | 605 | IWL_DEBUG_RX(priv, "Packet destroyed\n"); |
1781a07f EG |
606 | return -1; |
607 | } | |
608 | case RX_RES_STATUS_SEC_TYPE_CCMP: | |
609 | if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) == | |
610 | RX_RES_STATUS_DECRYPT_OK) { | |
e1623446 | 611 | IWL_DEBUG_RX(priv, "hw decrypt successfully!!!\n"); |
1781a07f EG |
612 | stats->flag |= RX_FLAG_DECRYPTED; |
613 | } | |
614 | break; | |
615 | ||
616 | default: | |
617 | break; | |
618 | } | |
619 | return 0; | |
620 | } | |
466a19a0 | 621 | |
3246c4e6 | 622 | static void iwlagn_pass_packet_to_mac80211(struct iwl_priv *priv, |
466a19a0 SG |
623 | struct ieee80211_hdr *hdr, |
624 | u16 len, | |
625 | u32 ampdu_status, | |
48a2d66f | 626 | struct iwl_rx_cmd_buffer *rxb, |
466a19a0 SG |
627 | struct ieee80211_rx_status *stats) |
628 | { | |
629 | struct sk_buff *skb; | |
630 | __le16 fc = hdr->frame_control; | |
68b99311 | 631 | struct iwl_rxon_context *ctx; |
ed90542b | 632 | unsigned int hdrlen, fraglen; |
466a19a0 SG |
633 | |
634 | /* We only process data packets if the interface is open */ | |
635 | if (unlikely(!priv->is_open)) { | |
636 | IWL_DEBUG_DROP_LIMIT(priv, | |
637 | "Dropping packet while interface is not open.\n"); | |
638 | return; | |
639 | } | |
640 | ||
641 | /* In case of HW accelerated crypto and bad decryption, drop */ | |
65de7e84 | 642 | if (!iwlwifi_mod_params.sw_crypto && |
3246c4e6 | 643 | iwlagn_set_decrypted_flag(priv, hdr, ampdu_status, stats)) |
466a19a0 SG |
644 | return; |
645 | ||
ed90542b ED |
646 | /* Dont use dev_alloc_skb(), we'll have enough headroom once |
647 | * ieee80211_hdr pulled. | |
648 | */ | |
649 | skb = alloc_skb(128, GFP_ATOMIC); | |
466a19a0 | 650 | if (!skb) { |
ed90542b | 651 | IWL_ERR(priv, "alloc_skb failed\n"); |
466a19a0 SG |
652 | return; |
653 | } | |
56138f50 ED |
654 | /* If frame is small enough to fit in skb->head, pull it completely. |
655 | * If not, only pull ieee80211_hdr so that splice() or TCP coalesce | |
656 | * are more efficient. | |
657 | */ | |
658 | hdrlen = (len <= skb_tailroom(skb)) ? len : sizeof(*hdr); | |
659 | ||
ed90542b ED |
660 | memcpy(skb_put(skb, hdrlen), hdr, hdrlen); |
661 | fraglen = len - hdrlen; | |
466a19a0 | 662 | |
ed90542b | 663 | if (fraglen) { |
341352d1 JL |
664 | int offset = (void *)hdr + hdrlen - |
665 | rxb_addr(rxb) + rxb_offset(rxb); | |
466a19a0 | 666 | |
ed90542b ED |
667 | skb_add_rx_frag(skb, 0, rxb_steal_page(rxb), offset, |
668 | fraglen, rxb->truesize); | |
669 | } | |
466a19a0 | 670 | |
68b99311 GT |
671 | /* |
672 | * Wake any queues that were stopped due to a passive channel tx | |
673 | * failure. This can happen because the regulatory enforcement in | |
674 | * the device waits for a beacon before allowing transmission, | |
675 | * sometimes even after already having transmitted frames for the | |
676 | * association because the new RXON may reset the information. | |
677 | */ | |
e755f882 | 678 | if (unlikely(ieee80211_is_beacon(fc) && priv->passive_no_rx)) { |
68b99311 | 679 | for_each_context(priv, ctx) { |
2e42e474 JP |
680 | if (!ether_addr_equal(hdr->addr3, |
681 | ctx->active.bssid_addr)) | |
68b99311 | 682 | continue; |
e755f882 | 683 | iwlagn_lift_passive_no_rx(priv); |
68b99311 GT |
684 | } |
685 | } | |
686 | ||
466a19a0 SG |
687 | memcpy(IEEE80211_SKB_RXCB(skb), stats, sizeof(*stats)); |
688 | ||
d63b548f | 689 | ieee80211_rx_napi(priv->hw, NULL, skb, priv->napi); |
466a19a0 SG |
690 | } |
691 | ||
3246c4e6 | 692 | static u32 iwlagn_translate_rx_status(struct iwl_priv *priv, u32 decrypt_in) |
466a19a0 SG |
693 | { |
694 | u32 decrypt_out = 0; | |
695 | ||
696 | if ((decrypt_in & RX_RES_STATUS_STATION_FOUND) == | |
697 | RX_RES_STATUS_STATION_FOUND) | |
698 | decrypt_out |= (RX_RES_STATUS_STATION_FOUND | | |
699 | RX_RES_STATUS_NO_STATION_INFO_MISMATCH); | |
700 | ||
701 | decrypt_out |= (decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK); | |
702 | ||
703 | /* packet was not encrypted */ | |
704 | if ((decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) == | |
705 | RX_RES_STATUS_SEC_TYPE_NONE) | |
706 | return decrypt_out; | |
707 | ||
708 | /* packet was encrypted with unknown alg */ | |
709 | if ((decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) == | |
710 | RX_RES_STATUS_SEC_TYPE_ERR) | |
711 | return decrypt_out; | |
712 | ||
713 | /* decryption was not done in HW */ | |
714 | if ((decrypt_in & RX_MPDU_RES_STATUS_DEC_DONE_MSK) != | |
715 | RX_MPDU_RES_STATUS_DEC_DONE_MSK) | |
716 | return decrypt_out; | |
717 | ||
718 | switch (decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) { | |
719 | ||
720 | case RX_RES_STATUS_SEC_TYPE_CCMP: | |
721 | /* alg is CCM: check MIC only */ | |
722 | if (!(decrypt_in & RX_MPDU_RES_STATUS_MIC_OK)) | |
723 | /* Bad MIC */ | |
724 | decrypt_out |= RX_RES_STATUS_BAD_ICV_MIC; | |
725 | else | |
726 | decrypt_out |= RX_RES_STATUS_DECRYPT_OK; | |
727 | ||
728 | break; | |
729 | ||
730 | case RX_RES_STATUS_SEC_TYPE_TKIP: | |
731 | if (!(decrypt_in & RX_MPDU_RES_STATUS_TTAK_OK)) { | |
732 | /* Bad TTAK */ | |
733 | decrypt_out |= RX_RES_STATUS_BAD_KEY_TTAK; | |
734 | break; | |
735 | } | |
736 | /* fall through if TTAK OK */ | |
737 | default: | |
738 | if (!(decrypt_in & RX_MPDU_RES_STATUS_ICV_OK)) | |
739 | decrypt_out |= RX_RES_STATUS_BAD_ICV_MIC; | |
740 | else | |
741 | decrypt_out |= RX_RES_STATUS_DECRYPT_OK; | |
742 | break; | |
743 | } | |
744 | ||
745 | IWL_DEBUG_RX(priv, "decrypt_in:0x%x decrypt_out = 0x%x\n", | |
746 | decrypt_in, decrypt_out); | |
747 | ||
748 | return decrypt_out; | |
749 | } | |
750 | ||
5c3d29fc DF |
751 | /* Calc max signal level (dBm) among 3 possible receivers */ |
752 | static int iwlagn_calc_rssi(struct iwl_priv *priv, | |
753 | struct iwl_rx_phy_res *rx_resp) | |
754 | { | |
755 | /* data from PHY/DSP regarding signal strength, etc., | |
756 | * contents are always there, not configurable by host | |
757 | */ | |
758 | struct iwlagn_non_cfg_phy *ncphy = | |
759 | (struct iwlagn_non_cfg_phy *)rx_resp->non_cfg_phy_buf; | |
760 | u32 val, rssi_a, rssi_b, rssi_c, max_rssi; | |
761 | u8 agc; | |
762 | ||
763 | val = le32_to_cpu(ncphy->non_cfg_phy[IWLAGN_RX_RES_AGC_IDX]); | |
764 | agc = (val & IWLAGN_OFDM_AGC_MSK) >> IWLAGN_OFDM_AGC_BIT_POS; | |
765 | ||
766 | /* Find max rssi among 3 possible receivers. | |
767 | * These values are measured by the digital signal processor (DSP). | |
768 | * They should stay fairly constant even as the signal strength varies, | |
769 | * if the radio's automatic gain control (AGC) is working right. | |
770 | * AGC value (see below) will provide the "interesting" info. | |
771 | */ | |
772 | val = le32_to_cpu(ncphy->non_cfg_phy[IWLAGN_RX_RES_RSSI_AB_IDX]); | |
773 | rssi_a = (val & IWLAGN_OFDM_RSSI_INBAND_A_BITMSK) >> | |
774 | IWLAGN_OFDM_RSSI_A_BIT_POS; | |
775 | rssi_b = (val & IWLAGN_OFDM_RSSI_INBAND_B_BITMSK) >> | |
776 | IWLAGN_OFDM_RSSI_B_BIT_POS; | |
777 | val = le32_to_cpu(ncphy->non_cfg_phy[IWLAGN_RX_RES_RSSI_C_IDX]); | |
778 | rssi_c = (val & IWLAGN_OFDM_RSSI_INBAND_C_BITMSK) >> | |
779 | IWLAGN_OFDM_RSSI_C_BIT_POS; | |
780 | ||
781 | max_rssi = max_t(u32, rssi_a, rssi_b); | |
782 | max_rssi = max_t(u32, max_rssi, rssi_c); | |
783 | ||
784 | IWL_DEBUG_STATS(priv, "Rssi In A %d B %d C %d Max %d AGC dB %d\n", | |
785 | rssi_a, rssi_b, rssi_c, max_rssi, agc); | |
786 | ||
787 | /* dBm = max_rssi dB - agc dB - constant. | |
788 | * Higher AGC (higher radio gain) means lower signal. */ | |
789 | return max_rssi - agc - IWLAGN_RSSI_OFFSET; | |
790 | } | |
791 | ||
6d044b90 | 792 | /* Called for REPLY_RX_MPDU_CMD */ |
73e686f3 JB |
793 | static void iwlagn_rx_reply_rx(struct iwl_priv *priv, |
794 | struct iwl_rx_cmd_buffer *rxb) | |
466a19a0 SG |
795 | { |
796 | struct ieee80211_hdr *header; | |
1d815ef4 | 797 | struct ieee80211_rx_status rx_status = {}; |
466a19a0 SG |
798 | struct iwl_rx_packet *pkt = rxb_addr(rxb); |
799 | struct iwl_rx_phy_res *phy_res; | |
800 | __le32 rx_pkt_status; | |
801 | struct iwl_rx_mpdu_res_start *amsdu; | |
802 | u32 len; | |
803 | u32 ampdu_status; | |
804 | u32 rate_n_flags; | |
805 | ||
6d044b90 EG |
806 | if (!priv->last_phy_res_valid) { |
807 | IWL_ERR(priv, "MPDU frame without cached PHY data\n"); | |
73e686f3 | 808 | return; |
466a19a0 | 809 | } |
6d044b90 EG |
810 | phy_res = &priv->last_phy_res; |
811 | amsdu = (struct iwl_rx_mpdu_res_start *)pkt->data; | |
812 | header = (struct ieee80211_hdr *)(pkt->data + sizeof(*amsdu)); | |
813 | len = le16_to_cpu(amsdu->byte_count); | |
814 | rx_pkt_status = *(__le32 *)(pkt->data + sizeof(*amsdu) + len); | |
815 | ampdu_status = iwlagn_translate_rx_status(priv, | |
816 | le32_to_cpu(rx_pkt_status)); | |
466a19a0 SG |
817 | |
818 | if ((unlikely(phy_res->cfg_phy_cnt > 20))) { | |
0ca24daf | 819 | IWL_DEBUG_DROP(priv, "dsp size out of range [0,20]: %d\n", |
466a19a0 | 820 | phy_res->cfg_phy_cnt); |
73e686f3 | 821 | return; |
466a19a0 SG |
822 | } |
823 | ||
824 | if (!(rx_pkt_status & RX_RES_STATUS_NO_CRC32_ERROR) || | |
825 | !(rx_pkt_status & RX_RES_STATUS_NO_RXE_OVERFLOW)) { | |
826 | IWL_DEBUG_RX(priv, "Bad CRC or FIFO: 0x%08X.\n", | |
827 | le32_to_cpu(rx_pkt_status)); | |
73e686f3 | 828 | return; |
466a19a0 SG |
829 | } |
830 | ||
831 | /* This will be used in several places later */ | |
832 | rate_n_flags = le32_to_cpu(phy_res->rate_n_flags); | |
833 | ||
834 | /* rx_status carries information about the packet to mac80211 */ | |
835 | rx_status.mactime = le64_to_cpu(phy_res->timestamp); | |
836 | rx_status.band = (phy_res->phy_flags & RX_RES_PHY_FLAGS_BAND_24_MSK) ? | |
837 | IEEE80211_BAND_2GHZ : IEEE80211_BAND_5GHZ; | |
838 | rx_status.freq = | |
839 | ieee80211_channel_to_frequency(le16_to_cpu(phy_res->channel), | |
840 | rx_status.band); | |
841 | rx_status.rate_idx = | |
842 | iwlagn_hwrate_to_mac80211_idx(rate_n_flags, rx_status.band); | |
843 | rx_status.flag = 0; | |
844 | ||
845 | /* TSF isn't reliable. In order to allow smooth user experience, | |
846 | * this W/A doesn't propagate it to the mac80211 */ | |
f4bda337 | 847 | /*rx_status.flag |= RX_FLAG_MACTIME_START;*/ |
466a19a0 SG |
848 | |
849 | priv->ucode_beacon_time = le32_to_cpu(phy_res->beacon_time_stamp); | |
850 | ||
851 | /* Find max signal strength (dBm) among 3 antenna/receiver chains */ | |
5c3d29fc | 852 | rx_status.signal = iwlagn_calc_rssi(priv, phy_res); |
466a19a0 | 853 | |
466a19a0 SG |
854 | IWL_DEBUG_STATS_LIMIT(priv, "Rssi %d, TSF %llu\n", |
855 | rx_status.signal, (unsigned long long)rx_status.mactime); | |
856 | ||
857 | /* | |
858 | * "antenna number" | |
859 | * | |
860 | * It seems that the antenna field in the phy flags value | |
861 | * is actually a bit field. This is undefined by radiotap, | |
862 | * it wants an actual antenna number but I always get "7" | |
863 | * for most legacy frames I receive indicating that the | |
864 | * same frame was received on all three RX chains. | |
865 | * | |
866 | * I think this field should be removed in favor of a | |
867 | * new 802.11n radiotap field "RX chains" that is defined | |
868 | * as a bitmask. | |
869 | */ | |
870 | rx_status.antenna = | |
871 | (le16_to_cpu(phy_res->phy_flags) & RX_RES_PHY_FLAGS_ANTENNA_MSK) | |
872 | >> RX_RES_PHY_FLAGS_ANTENNA_POS; | |
873 | ||
874 | /* set the preamble flag if appropriate */ | |
875 | if (phy_res->phy_flags & RX_RES_PHY_FLAGS_SHORT_PREAMBLE_MSK) | |
876 | rx_status.flag |= RX_FLAG_SHORTPRE; | |
877 | ||
12bf6f45 JB |
878 | if (phy_res->phy_flags & RX_RES_PHY_FLAGS_AGG_MSK) { |
879 | /* | |
880 | * We know which subframes of an A-MPDU belong | |
881 | * together since we get a single PHY response | |
882 | * from the firmware for all of them | |
883 | */ | |
884 | rx_status.flag |= RX_FLAG_AMPDU_DETAILS; | |
885 | rx_status.ampdu_reference = priv->ampdu_ref; | |
886 | } | |
887 | ||
466a19a0 SG |
888 | /* Set up the HT phy flags */ |
889 | if (rate_n_flags & RATE_MCS_HT_MSK) | |
890 | rx_status.flag |= RX_FLAG_HT; | |
891 | if (rate_n_flags & RATE_MCS_HT40_MSK) | |
892 | rx_status.flag |= RX_FLAG_40MHZ; | |
893 | if (rate_n_flags & RATE_MCS_SGI_MSK) | |
894 | rx_status.flag |= RX_FLAG_SHORT_GI; | |
53e1116e JB |
895 | if (rate_n_flags & RATE_MCS_GF_MSK) |
896 | rx_status.flag |= RX_FLAG_HT_GF; | |
466a19a0 | 897 | |
3246c4e6 | 898 | iwlagn_pass_packet_to_mac80211(priv, header, len, ampdu_status, |
466a19a0 SG |
899 | rxb, &rx_status); |
900 | } | |
901 | ||
73e686f3 JB |
902 | static void iwlagn_rx_noa_notification(struct iwl_priv *priv, |
903 | struct iwl_rx_cmd_buffer *rxb) | |
79d3eef8 JB |
904 | { |
905 | struct iwl_wipan_noa_data *new_data, *old_data; | |
906 | struct iwl_rx_packet *pkt = rxb_addr(rxb); | |
f8d7c1a1 | 907 | struct iwl_wipan_noa_notification *noa_notif = (void *)pkt->data; |
79d3eef8 JB |
908 | |
909 | /* no condition -- we're in softirq */ | |
910 | old_data = rcu_dereference_protected(priv->noa_data, true); | |
911 | ||
912 | if (noa_notif->noa_active) { | |
913 | u32 len = le16_to_cpu(noa_notif->noa_attribute.length); | |
914 | u32 copylen = len; | |
915 | ||
916 | /* EID, len, OUI, subtype */ | |
917 | len += 1 + 1 + 3 + 1; | |
918 | /* P2P id, P2P length */ | |
919 | len += 1 + 2; | |
920 | copylen += 1 + 2; | |
921 | ||
922 | new_data = kmalloc(sizeof(*new_data) + len, GFP_ATOMIC); | |
923 | if (new_data) { | |
924 | new_data->length = len; | |
925 | new_data->data[0] = WLAN_EID_VENDOR_SPECIFIC; | |
926 | new_data->data[1] = len - 2; /* not counting EID, len */ | |
927 | new_data->data[2] = (WLAN_OUI_WFA >> 16) & 0xff; | |
928 | new_data->data[3] = (WLAN_OUI_WFA >> 8) & 0xff; | |
929 | new_data->data[4] = (WLAN_OUI_WFA >> 0) & 0xff; | |
930 | new_data->data[5] = WLAN_OUI_TYPE_WFA_P2P; | |
931 | memcpy(&new_data->data[6], &noa_notif->noa_attribute, | |
932 | copylen); | |
933 | } | |
934 | } else | |
935 | new_data = NULL; | |
936 | ||
937 | rcu_assign_pointer(priv->noa_data, new_data); | |
938 | ||
939 | if (old_data) | |
940 | kfree_rcu(old_data, rcu_head); | |
79d3eef8 JB |
941 | } |
942 | ||
466a19a0 SG |
943 | /** |
944 | * iwl_setup_rx_handlers - Initialize Rx handler callbacks | |
945 | * | |
946 | * Setup the RX handlers for each of the reply types sent from the uCode | |
947 | * to the host. | |
948 | */ | |
949 | void iwl_setup_rx_handlers(struct iwl_priv *priv) | |
950 | { | |
73e686f3 | 951 | void (**handlers)(struct iwl_priv *priv, struct iwl_rx_cmd_buffer *rxb); |
466a19a0 SG |
952 | |
953 | handlers = priv->rx_handlers; | |
954 | ||
3246c4e6 WYG |
955 | handlers[REPLY_ERROR] = iwlagn_rx_reply_error; |
956 | handlers[CHANNEL_SWITCH_NOTIFICATION] = iwlagn_rx_csa; | |
957 | handlers[SPECTRUM_MEASURE_NOTIFICATION] = | |
958 | iwlagn_rx_spectrum_measure_notif; | |
959 | handlers[PM_SLEEP_NOTIFICATION] = iwlagn_rx_pm_sleep_notif; | |
960 | handlers[PM_DEBUG_STATISTIC_NOTIFIC] = | |
961 | iwlagn_rx_pm_debug_statistics_notif; | |
962 | handlers[BEACON_NOTIFICATION] = iwlagn_rx_beacon_notif; | |
247c61d6 | 963 | handlers[REPLY_ADD_STA] = iwl_add_sta_callback; |
466a19a0 | 964 | |
79d3eef8 JB |
965 | handlers[REPLY_WIPAN_NOA_NOTIFICATION] = iwlagn_rx_noa_notification; |
966 | ||
466a19a0 SG |
967 | /* |
968 | * The same handler is used for both the REPLY to a discrete | |
969 | * statistics request from the host as well as for the periodic | |
970 | * statistics notifications (after received beacons) from the uCode. | |
971 | */ | |
3246c4e6 WYG |
972 | handlers[REPLY_STATISTICS_CMD] = iwlagn_rx_reply_statistics; |
973 | handlers[STATISTICS_NOTIFICATION] = iwlagn_rx_statistics; | |
466a19a0 SG |
974 | |
975 | iwl_setup_rx_scan_handlers(priv); | |
976 | ||
3246c4e6 WYG |
977 | handlers[CARD_STATE_NOTIFICATION] = iwlagn_rx_card_state_notif; |
978 | handlers[MISSED_BEACONS_NOTIFICATION] = | |
979 | iwlagn_rx_missed_beacon_notif; | |
466a19a0 SG |
980 | |
981 | /* Rx handlers */ | |
3246c4e6 WYG |
982 | handlers[REPLY_RX_PHY_CMD] = iwlagn_rx_reply_rx_phy; |
983 | handlers[REPLY_RX_MPDU_CMD] = iwlagn_rx_reply_rx; | |
466a19a0 SG |
984 | |
985 | /* block ack */ | |
3246c4e6 WYG |
986 | handlers[REPLY_COMPRESSED_BA] = |
987 | iwlagn_rx_reply_compressed_ba; | |
466a19a0 | 988 | |
8d301193 EG |
989 | priv->rx_handlers[REPLY_TX] = iwlagn_rx_reply_tx; |
990 | ||
991 | /* set up notification wait support */ | |
4bd14dd5 | 992 | iwl_notification_wait_init(&priv->notif_wait); |
8d301193 EG |
993 | |
994 | /* Set up BT Rx handlers */ | |
0d8877a1 | 995 | if (priv->lib->bt_params) |
562f08eb | 996 | iwlagn_bt_rx_handler_setup(priv); |
466a19a0 | 997 | } |
1ab9f6c1 | 998 | |
1be5d8cc JB |
999 | void iwl_rx_dispatch(struct iwl_op_mode *op_mode, struct napi_struct *napi, |
1000 | struct iwl_rx_cmd_buffer *rxb) | |
1ab9f6c1 EG |
1001 | { |
1002 | struct iwl_rx_packet *pkt = rxb_addr(rxb); | |
db70f290 | 1003 | struct iwl_priv *priv = IWL_OP_MODE_GET_DVM(op_mode); |
1ab9f6c1 EG |
1004 | |
1005 | /* | |
1006 | * Do the notification wait before RX handlers so | |
1007 | * even if the RX handler consumes the RXB we have | |
1008 | * access to it in the notification wait entry. | |
1009 | */ | |
4bd14dd5 | 1010 | iwl_notification_wait_notify(&priv->notif_wait, pkt); |
1ab9f6c1 | 1011 | |
49464ae5 JB |
1012 | /* Based on type of command response or notification, |
1013 | * handle those that need handling via function in | |
1014 | * rx_handlers table. See iwl_setup_rx_handlers() */ | |
1015 | if (priv->rx_handlers[pkt->hdr.cmd]) { | |
1016 | priv->rx_handlers_stats[pkt->hdr.cmd]++; | |
73e686f3 | 1017 | priv->rx_handlers[pkt->hdr.cmd](priv, rxb); |
49464ae5 JB |
1018 | } else { |
1019 | /* No handling needed */ | |
1020 | IWL_DEBUG_RX(priv, "No handler needed for %s, 0x%02x\n", | |
39bdb17e SD |
1021 | iwl_get_cmd_string(priv->trans, |
1022 | iwl_cmd_id(pkt->hdr.cmd, | |
1023 | 0, 0)), | |
49464ae5 | 1024 | pkt->hdr.cmd); |
1ab9f6c1 EG |
1025 | } |
1026 | } |