1 /******************************************************************************
2 *
3 * Copyright(c) 2003 - 2014 Intel Corporation. All rights reserved.
4 *
5 * Portions of this file are derived from the ipw3945 project, as well
6 * as portionhelp of the ieee80211 subsystem header files.
7 *
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of version 2 of the GNU General Public License as
10 * published by the Free Software Foundation.
11 *
12 * This program is distributed in the hope that it will be useful, but WITHOUT
13 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
15 * more details.
16 *
17 * You should have received a copy of the GNU General Public License along with
18 * this program; if not, write to the Free Software Foundation, Inc.,
19 * 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
20 *
21 * The full GNU General Public License is included in this distribution in the
22 * file called LICENSE.
23 *
24 * Contact Information:
25 * Intel Linux Wireless <ilw@linux.intel.com>
26 * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
27 *
28 *****************************************************************************/
29
30 #include <linux/etherdevice.h>
31 #include <linux/slab.h>
32 #include <linux/sched.h>
33 #include <net/mac80211.h>
34 #include <asm/unaligned.h>
35 #include "iwl-io.h"
36 #include "dev.h"
37 #include "calib.h"
38 #include "agn.h"
39
40 #define IWL_CMD_ENTRY(x) [x] = #x
41
42 const char *const iwl_dvm_cmd_strings[REPLY_MAX + 1] = {
43 IWL_CMD_ENTRY(REPLY_ALIVE),
44 IWL_CMD_ENTRY(REPLY_ERROR),
45 IWL_CMD_ENTRY(REPLY_ECHO),
46 IWL_CMD_ENTRY(REPLY_RXON),
47 IWL_CMD_ENTRY(REPLY_RXON_ASSOC),
48 IWL_CMD_ENTRY(REPLY_QOS_PARAM),
49 IWL_CMD_ENTRY(REPLY_RXON_TIMING),
50 IWL_CMD_ENTRY(REPLY_ADD_STA),
51 IWL_CMD_ENTRY(REPLY_REMOVE_STA),
52 IWL_CMD_ENTRY(REPLY_REMOVE_ALL_STA),
53 IWL_CMD_ENTRY(REPLY_TXFIFO_FLUSH),
54 IWL_CMD_ENTRY(REPLY_WEPKEY),
55 IWL_CMD_ENTRY(REPLY_TX),
56 IWL_CMD_ENTRY(REPLY_LEDS_CMD),
57 IWL_CMD_ENTRY(REPLY_TX_LINK_QUALITY_CMD),
58 IWL_CMD_ENTRY(COEX_PRIORITY_TABLE_CMD),
59 IWL_CMD_ENTRY(COEX_MEDIUM_NOTIFICATION),
60 IWL_CMD_ENTRY(COEX_EVENT_CMD),
61 IWL_CMD_ENTRY(REPLY_QUIET_CMD),
62 IWL_CMD_ENTRY(REPLY_CHANNEL_SWITCH),
63 IWL_CMD_ENTRY(CHANNEL_SWITCH_NOTIFICATION),
64 IWL_CMD_ENTRY(REPLY_SPECTRUM_MEASUREMENT_CMD),
65 IWL_CMD_ENTRY(SPECTRUM_MEASURE_NOTIFICATION),
66 IWL_CMD_ENTRY(POWER_TABLE_CMD),
67 IWL_CMD_ENTRY(PM_SLEEP_NOTIFICATION),
68 IWL_CMD_ENTRY(PM_DEBUG_STATISTIC_NOTIFIC),
69 IWL_CMD_ENTRY(REPLY_SCAN_CMD),
70 IWL_CMD_ENTRY(REPLY_SCAN_ABORT_CMD),
71 IWL_CMD_ENTRY(SCAN_START_NOTIFICATION),
72 IWL_CMD_ENTRY(SCAN_RESULTS_NOTIFICATION),
73 IWL_CMD_ENTRY(SCAN_COMPLETE_NOTIFICATION),
74 IWL_CMD_ENTRY(BEACON_NOTIFICATION),
75 IWL_CMD_ENTRY(REPLY_TX_BEACON),
76 IWL_CMD_ENTRY(WHO_IS_AWAKE_NOTIFICATION),
77 IWL_CMD_ENTRY(QUIET_NOTIFICATION),
78 IWL_CMD_ENTRY(REPLY_TX_PWR_TABLE_CMD),
79 IWL_CMD_ENTRY(MEASURE_ABORT_NOTIFICATION),
80 IWL_CMD_ENTRY(REPLY_BT_CONFIG),
81 IWL_CMD_ENTRY(REPLY_STATISTICS_CMD),
82 IWL_CMD_ENTRY(STATISTICS_NOTIFICATION),
83 IWL_CMD_ENTRY(REPLY_CARD_STATE_CMD),
84 IWL_CMD_ENTRY(CARD_STATE_NOTIFICATION),
85 IWL_CMD_ENTRY(MISSED_BEACONS_NOTIFICATION),
86 IWL_CMD_ENTRY(REPLY_CT_KILL_CONFIG_CMD),
87 IWL_CMD_ENTRY(SENSITIVITY_CMD),
88 IWL_CMD_ENTRY(REPLY_PHY_CALIBRATION_CMD),
89 IWL_CMD_ENTRY(REPLY_RX_PHY_CMD),
90 IWL_CMD_ENTRY(REPLY_RX_MPDU_CMD),
91 IWL_CMD_ENTRY(REPLY_COMPRESSED_BA),
92 IWL_CMD_ENTRY(CALIBRATION_CFG_CMD),
93 IWL_CMD_ENTRY(CALIBRATION_RES_NOTIFICATION),
94 IWL_CMD_ENTRY(CALIBRATION_COMPLETE_NOTIFICATION),
95 IWL_CMD_ENTRY(REPLY_TX_POWER_DBM_CMD),
96 IWL_CMD_ENTRY(TEMPERATURE_NOTIFICATION),
97 IWL_CMD_ENTRY(TX_ANT_CONFIGURATION_CMD),
98 IWL_CMD_ENTRY(REPLY_BT_COEX_PROFILE_NOTIF),
99 IWL_CMD_ENTRY(REPLY_BT_COEX_PRIO_TABLE),
100 IWL_CMD_ENTRY(REPLY_BT_COEX_PROT_ENV),
101 IWL_CMD_ENTRY(REPLY_WIPAN_PARAMS),
102 IWL_CMD_ENTRY(REPLY_WIPAN_RXON),
103 IWL_CMD_ENTRY(REPLY_WIPAN_RXON_TIMING),
104 IWL_CMD_ENTRY(REPLY_WIPAN_RXON_ASSOC),
105 IWL_CMD_ENTRY(REPLY_WIPAN_QOS_PARAM),
106 IWL_CMD_ENTRY(REPLY_WIPAN_WEPKEY),
107 IWL_CMD_ENTRY(REPLY_WIPAN_P2P_CHANNEL_SWITCH),
108 IWL_CMD_ENTRY(REPLY_WIPAN_NOA_NOTIFICATION),
109 IWL_CMD_ENTRY(REPLY_WIPAN_DEACTIVATION_COMPLETE),
110 IWL_CMD_ENTRY(REPLY_WOWLAN_PATTERNS),
111 IWL_CMD_ENTRY(REPLY_WOWLAN_WAKEUP_FILTER),
112 IWL_CMD_ENTRY(REPLY_WOWLAN_TSC_RSC_PARAMS),
113 IWL_CMD_ENTRY(REPLY_WOWLAN_TKIP_PARAMS),
114 IWL_CMD_ENTRY(REPLY_WOWLAN_KEK_KCK_MATERIAL),
115 IWL_CMD_ENTRY(REPLY_WOWLAN_GET_STATUS),
116 IWL_CMD_ENTRY(REPLY_D3_CONFIG),
117 };
118 #undef IWL_CMD_ENTRY
119
120 /******************************************************************************
121 *
122 * Generic RX handler implementations
123 *
124 ******************************************************************************/
125
iwlagn_rx_reply_error(struct iwl_priv * priv,struct iwl_rx_cmd_buffer * rxb)126 static void iwlagn_rx_reply_error(struct iwl_priv *priv,
127 struct iwl_rx_cmd_buffer *rxb)
128 {
129 struct iwl_rx_packet *pkt = rxb_addr(rxb);
130 struct iwl_error_resp *err_resp = (void *)pkt->data;
131
132 IWL_ERR(priv, "Error Reply type 0x%08X cmd REPLY_ERROR (0x%02X) "
133 "seq 0x%04X ser 0x%08X\n",
134 le32_to_cpu(err_resp->error_type),
135 err_resp->cmd_id,
136 le16_to_cpu(err_resp->bad_cmd_seq_num),
137 le32_to_cpu(err_resp->error_info));
138 }
139
iwlagn_rx_csa(struct iwl_priv * priv,struct iwl_rx_cmd_buffer * rxb)140 static void iwlagn_rx_csa(struct iwl_priv *priv, struct iwl_rx_cmd_buffer *rxb)
141 {
142 struct iwl_rx_packet *pkt = rxb_addr(rxb);
143 struct iwl_csa_notification *csa = (void *)pkt->data;
144 /*
145 * MULTI-FIXME
146 * See iwlagn_mac_channel_switch.
147 */
148 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
149 struct iwl_rxon_cmd *rxon = (void *)&ctx->active;
150
151 if (!test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status))
152 return;
153
154 if (!le32_to_cpu(csa->status) && csa->channel == priv->switch_channel) {
155 rxon->channel = csa->channel;
156 ctx->staging.channel = csa->channel;
157 IWL_DEBUG_11H(priv, "CSA notif: channel %d\n",
158 le16_to_cpu(csa->channel));
159 iwl_chswitch_done(priv, true);
160 } else {
161 IWL_ERR(priv, "CSA notif (fail) : channel %d\n",
162 le16_to_cpu(csa->channel));
163 iwl_chswitch_done(priv, false);
164 }
165 }
166
167
iwlagn_rx_spectrum_measure_notif(struct iwl_priv * priv,struct iwl_rx_cmd_buffer * rxb)168 static void iwlagn_rx_spectrum_measure_notif(struct iwl_priv *priv,
169 struct iwl_rx_cmd_buffer *rxb)
170 {
171 struct iwl_rx_packet *pkt = rxb_addr(rxb);
172 struct iwl_spectrum_notification *report = (void *)pkt->data;
173
174 if (!report->state) {
175 IWL_DEBUG_11H(priv,
176 "Spectrum Measure Notification: Start\n");
177 return;
178 }
179
180 memcpy(&priv->measure_report, report, sizeof(*report));
181 priv->measurement_status |= MEASUREMENT_READY;
182 }
183
iwlagn_rx_pm_sleep_notif(struct iwl_priv * priv,struct iwl_rx_cmd_buffer * rxb)184 static void iwlagn_rx_pm_sleep_notif(struct iwl_priv *priv,
185 struct iwl_rx_cmd_buffer *rxb)
186 {
187 #ifdef CONFIG_IWLWIFI_DEBUG
188 struct iwl_rx_packet *pkt = rxb_addr(rxb);
189 struct iwl_sleep_notification *sleep = (void *)pkt->data;
190 IWL_DEBUG_RX(priv, "sleep mode: %d, src: %d\n",
191 sleep->pm_sleep_mode, sleep->pm_wakeup_src);
192 #endif
193 }
194
iwlagn_rx_pm_debug_statistics_notif(struct iwl_priv * priv,struct iwl_rx_cmd_buffer * rxb)195 static void iwlagn_rx_pm_debug_statistics_notif(struct iwl_priv *priv,
196 struct iwl_rx_cmd_buffer *rxb)
197 {
198 struct iwl_rx_packet *pkt = rxb_addr(rxb);
199 u32 __maybe_unused len = iwl_rx_packet_len(pkt);
200 IWL_DEBUG_RADIO(priv, "Dumping %d bytes of unhandled "
201 "notification for PM_DEBUG_STATISTIC_NOTIFIC:\n", len);
202 iwl_print_hex_dump(priv, IWL_DL_RADIO, pkt->data, len);
203 }
204
iwlagn_rx_beacon_notif(struct iwl_priv * priv,struct iwl_rx_cmd_buffer * rxb)205 static void iwlagn_rx_beacon_notif(struct iwl_priv *priv,
206 struct iwl_rx_cmd_buffer *rxb)
207 {
208 struct iwl_rx_packet *pkt = rxb_addr(rxb);
209 struct iwlagn_beacon_notif *beacon = (void *)pkt->data;
210 #ifdef CONFIG_IWLWIFI_DEBUG
211 u16 status = le16_to_cpu(beacon->beacon_notify_hdr.status.status);
212 u8 rate = iwl_hw_get_rate(beacon->beacon_notify_hdr.rate_n_flags);
213
214 IWL_DEBUG_RX(priv, "beacon status %#x, retries:%d ibssmgr:%d "
215 "tsf:0x%.8x%.8x rate:%d\n",
216 status & TX_STATUS_MSK,
217 beacon->beacon_notify_hdr.failure_frame,
218 le32_to_cpu(beacon->ibss_mgr_status),
219 le32_to_cpu(beacon->high_tsf),
220 le32_to_cpu(beacon->low_tsf), rate);
221 #endif
222
223 priv->ibss_manager = le32_to_cpu(beacon->ibss_mgr_status);
224 }
225
226 /**
227 * iwl_good_plcp_health - checks for plcp error.
228 *
229 * When the plcp error is exceeding the thresholds, reset the radio
230 * to improve the throughput.
231 */
iwlagn_good_plcp_health(struct iwl_priv * priv,struct statistics_rx_phy * cur_ofdm,struct statistics_rx_ht_phy * cur_ofdm_ht,unsigned int msecs)232 static bool iwlagn_good_plcp_health(struct iwl_priv *priv,
233 struct statistics_rx_phy *cur_ofdm,
234 struct statistics_rx_ht_phy *cur_ofdm_ht,
235 unsigned int msecs)
236 {
237 int delta;
238 int threshold = priv->plcp_delta_threshold;
239
240 if (threshold == IWL_MAX_PLCP_ERR_THRESHOLD_DISABLE) {
241 IWL_DEBUG_RADIO(priv, "plcp_err check disabled\n");
242 return true;
243 }
244
245 delta = le32_to_cpu(cur_ofdm->plcp_err) -
246 le32_to_cpu(priv->statistics.rx_ofdm.plcp_err) +
247 le32_to_cpu(cur_ofdm_ht->plcp_err) -
248 le32_to_cpu(priv->statistics.rx_ofdm_ht.plcp_err);
249
250 /* Can be negative if firmware reset statistics */
251 if (delta <= 0)
252 return true;
253
254 if ((delta * 100 / msecs) > threshold) {
255 IWL_DEBUG_RADIO(priv,
256 "plcp health threshold %u delta %d msecs %u\n",
257 threshold, delta, msecs);
258 return false;
259 }
260
261 return true;
262 }
263
iwl_force_rf_reset(struct iwl_priv * priv,bool external)264 int iwl_force_rf_reset(struct iwl_priv *priv, bool external)
265 {
266 struct iwl_rf_reset *rf_reset;
267
268 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
269 return -EAGAIN;
270
271 if (!iwl_is_any_associated(priv)) {
272 IWL_DEBUG_SCAN(priv, "force reset rejected: not associated\n");
273 return -ENOLINK;
274 }
275
276 rf_reset = &priv->rf_reset;
277 rf_reset->reset_request_count++;
278 if (!external && rf_reset->last_reset_jiffies &&
279 time_after(rf_reset->last_reset_jiffies +
280 IWL_DELAY_NEXT_FORCE_RF_RESET, jiffies)) {
281 IWL_DEBUG_INFO(priv, "RF reset rejected\n");
282 rf_reset->reset_reject_count++;
283 return -EAGAIN;
284 }
285 rf_reset->reset_success_count++;
286 rf_reset->last_reset_jiffies = jiffies;
287
288 /*
289 * There is no easy and better way to force reset the radio,
290 * the only known method is switching channel which will force to
291 * reset and tune the radio.
292 * Use internal short scan (single channel) operation to should
293 * achieve this objective.
294 * Driver should reset the radio when number of consecutive missed
295 * beacon, or any other uCode error condition detected.
296 */
297 IWL_DEBUG_INFO(priv, "perform radio reset.\n");
298 iwl_internal_short_hw_scan(priv);
299 return 0;
300 }
301
302
iwlagn_recover_from_statistics(struct iwl_priv * priv,struct statistics_rx_phy * cur_ofdm,struct statistics_rx_ht_phy * cur_ofdm_ht,struct statistics_tx * tx,unsigned long stamp)303 static void iwlagn_recover_from_statistics(struct iwl_priv *priv,
304 struct statistics_rx_phy *cur_ofdm,
305 struct statistics_rx_ht_phy *cur_ofdm_ht,
306 struct statistics_tx *tx,
307 unsigned long stamp)
308 {
309 unsigned int msecs;
310
311 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
312 return;
313
314 msecs = jiffies_to_msecs(stamp - priv->rx_statistics_jiffies);
315
316 /* Only gather statistics and update time stamp when not associated */
317 if (!iwl_is_any_associated(priv))
318 return;
319
320 /* Do not check/recover when do not have enough statistics data */
321 if (msecs < 99)
322 return;
323
324 if (!iwlagn_good_plcp_health(priv, cur_ofdm, cur_ofdm_ht, msecs))
325 iwl_force_rf_reset(priv, false);
326 }
327
328 /* Calculate noise level, based on measurements during network silence just
329 * before arriving beacon. This measurement can be done only if we know
330 * exactly when to expect beacons, therefore only when we're associated. */
iwlagn_rx_calc_noise(struct iwl_priv * priv)331 static void iwlagn_rx_calc_noise(struct iwl_priv *priv)
332 {
333 struct statistics_rx_non_phy *rx_info;
334 int num_active_rx = 0;
335 int total_silence = 0;
336 int bcn_silence_a, bcn_silence_b, bcn_silence_c;
337 int last_rx_noise;
338
339 rx_info = &priv->statistics.rx_non_phy;
340
341 bcn_silence_a =
342 le32_to_cpu(rx_info->beacon_silence_rssi_a) & IN_BAND_FILTER;
343 bcn_silence_b =
344 le32_to_cpu(rx_info->beacon_silence_rssi_b) & IN_BAND_FILTER;
345 bcn_silence_c =
346 le32_to_cpu(rx_info->beacon_silence_rssi_c) & IN_BAND_FILTER;
347
348 if (bcn_silence_a) {
349 total_silence += bcn_silence_a;
350 num_active_rx++;
351 }
352 if (bcn_silence_b) {
353 total_silence += bcn_silence_b;
354 num_active_rx++;
355 }
356 if (bcn_silence_c) {
357 total_silence += bcn_silence_c;
358 num_active_rx++;
359 }
360
361 /* Average among active antennas */
362 if (num_active_rx)
363 last_rx_noise = (total_silence / num_active_rx) - 107;
364 else
365 last_rx_noise = IWL_NOISE_MEAS_NOT_AVAILABLE;
366
367 IWL_DEBUG_CALIB(priv, "inband silence a %u, b %u, c %u, dBm %d\n",
368 bcn_silence_a, bcn_silence_b, bcn_silence_c,
369 last_rx_noise);
370 }
371
372 #ifdef CONFIG_IWLWIFI_DEBUGFS
373 /*
374 * based on the assumption of all statistics counter are in DWORD
375 * FIXME: This function is for debugging, do not deal with
376 * the case of counters roll-over.
377 */
accum_stats(__le32 * prev,__le32 * cur,__le32 * delta,__le32 * max_delta,__le32 * accum,int size)378 static void accum_stats(__le32 *prev, __le32 *cur, __le32 *delta,
379 __le32 *max_delta, __le32 *accum, int size)
380 {
381 int i;
382
383 for (i = 0;
384 i < size / sizeof(__le32);
385 i++, prev++, cur++, delta++, max_delta++, accum++) {
386 if (le32_to_cpu(*cur) > le32_to_cpu(*prev)) {
387 *delta = cpu_to_le32(
388 le32_to_cpu(*cur) - le32_to_cpu(*prev));
389 le32_add_cpu(accum, le32_to_cpu(*delta));
390 if (le32_to_cpu(*delta) > le32_to_cpu(*max_delta))
391 *max_delta = *delta;
392 }
393 }
394 }
395
396 static void
iwlagn_accumulative_statistics(struct iwl_priv * priv,struct statistics_general_common * common,struct statistics_rx_non_phy * rx_non_phy,struct statistics_rx_phy * rx_ofdm,struct statistics_rx_ht_phy * rx_ofdm_ht,struct statistics_rx_phy * rx_cck,struct statistics_tx * tx,struct statistics_bt_activity * bt_activity)397 iwlagn_accumulative_statistics(struct iwl_priv *priv,
398 struct statistics_general_common *common,
399 struct statistics_rx_non_phy *rx_non_phy,
400 struct statistics_rx_phy *rx_ofdm,
401 struct statistics_rx_ht_phy *rx_ofdm_ht,
402 struct statistics_rx_phy *rx_cck,
403 struct statistics_tx *tx,
404 struct statistics_bt_activity *bt_activity)
405 {
406 #define ACCUM(_name) \
407 accum_stats((__le32 *)&priv->statistics._name, \
408 (__le32 *)_name, \
409 (__le32 *)&priv->delta_stats._name, \
410 (__le32 *)&priv->max_delta_stats._name, \
411 (__le32 *)&priv->accum_stats._name, \
412 sizeof(*_name));
413
414 ACCUM(common);
415 ACCUM(rx_non_phy);
416 ACCUM(rx_ofdm);
417 ACCUM(rx_ofdm_ht);
418 ACCUM(rx_cck);
419 ACCUM(tx);
420 if (bt_activity)
421 ACCUM(bt_activity);
422 #undef ACCUM
423 }
424 #else
425 static inline void
iwlagn_accumulative_statistics(struct iwl_priv * priv,struct statistics_general_common * common,struct statistics_rx_non_phy * rx_non_phy,struct statistics_rx_phy * rx_ofdm,struct statistics_rx_ht_phy * rx_ofdm_ht,struct statistics_rx_phy * rx_cck,struct statistics_tx * tx,struct statistics_bt_activity * bt_activity)426 iwlagn_accumulative_statistics(struct iwl_priv *priv,
427 struct statistics_general_common *common,
428 struct statistics_rx_non_phy *rx_non_phy,
429 struct statistics_rx_phy *rx_ofdm,
430 struct statistics_rx_ht_phy *rx_ofdm_ht,
431 struct statistics_rx_phy *rx_cck,
432 struct statistics_tx *tx,
433 struct statistics_bt_activity *bt_activity)
434 {
435 }
436 #endif
437
iwlagn_rx_statistics(struct iwl_priv * priv,struct iwl_rx_cmd_buffer * rxb)438 static void iwlagn_rx_statistics(struct iwl_priv *priv,
439 struct iwl_rx_cmd_buffer *rxb)
440 {
441 unsigned long stamp = jiffies;
442 const int reg_recalib_period = 60;
443 int change;
444 struct iwl_rx_packet *pkt = rxb_addr(rxb);
445 u32 len = iwl_rx_packet_payload_len(pkt);
446 __le32 *flag;
447 struct statistics_general_common *common;
448 struct statistics_rx_non_phy *rx_non_phy;
449 struct statistics_rx_phy *rx_ofdm;
450 struct statistics_rx_ht_phy *rx_ofdm_ht;
451 struct statistics_rx_phy *rx_cck;
452 struct statistics_tx *tx;
453 struct statistics_bt_activity *bt_activity;
454
455 IWL_DEBUG_RX(priv, "Statistics notification received (%d bytes).\n",
456 len);
457
458 spin_lock(&priv->statistics.lock);
459
460 if (len == sizeof(struct iwl_bt_notif_statistics)) {
461 struct iwl_bt_notif_statistics *stats;
462 stats = (void *)&pkt->data;
463 flag = &stats->flag;
464 common = &stats->general.common;
465 rx_non_phy = &stats->rx.general.common;
466 rx_ofdm = &stats->rx.ofdm;
467 rx_ofdm_ht = &stats->rx.ofdm_ht;
468 rx_cck = &stats->rx.cck;
469 tx = &stats->tx;
470 bt_activity = &stats->general.activity;
471
472 #ifdef CONFIG_IWLWIFI_DEBUGFS
473 /* handle this exception directly */
474 priv->statistics.num_bt_kills = stats->rx.general.num_bt_kills;
475 le32_add_cpu(&priv->statistics.accum_num_bt_kills,
476 le32_to_cpu(stats->rx.general.num_bt_kills));
477 #endif
478 } else if (len == sizeof(struct iwl_notif_statistics)) {
479 struct iwl_notif_statistics *stats;
480 stats = (void *)&pkt->data;
481 flag = &stats->flag;
482 common = &stats->general.common;
483 rx_non_phy = &stats->rx.general;
484 rx_ofdm = &stats->rx.ofdm;
485 rx_ofdm_ht = &stats->rx.ofdm_ht;
486 rx_cck = &stats->rx.cck;
487 tx = &stats->tx;
488 bt_activity = NULL;
489 } else {
490 WARN_ONCE(1, "len %d doesn't match BT (%zu) or normal (%zu)\n",
491 len, sizeof(struct iwl_bt_notif_statistics),
492 sizeof(struct iwl_notif_statistics));
493 spin_unlock(&priv->statistics.lock);
494 return;
495 }
496
497 change = common->temperature != priv->statistics.common.temperature ||
498 (*flag & STATISTICS_REPLY_FLG_HT40_MODE_MSK) !=
499 (priv->statistics.flag & STATISTICS_REPLY_FLG_HT40_MODE_MSK);
500
501 iwlagn_accumulative_statistics(priv, common, rx_non_phy, rx_ofdm,
502 rx_ofdm_ht, rx_cck, tx, bt_activity);
503
504 iwlagn_recover_from_statistics(priv, rx_ofdm, rx_ofdm_ht, tx, stamp);
505
506 priv->statistics.flag = *flag;
507 memcpy(&priv->statistics.common, common, sizeof(*common));
508 memcpy(&priv->statistics.rx_non_phy, rx_non_phy, sizeof(*rx_non_phy));
509 memcpy(&priv->statistics.rx_ofdm, rx_ofdm, sizeof(*rx_ofdm));
510 memcpy(&priv->statistics.rx_ofdm_ht, rx_ofdm_ht, sizeof(*rx_ofdm_ht));
511 memcpy(&priv->statistics.rx_cck, rx_cck, sizeof(*rx_cck));
512 memcpy(&priv->statistics.tx, tx, sizeof(*tx));
513 #ifdef CONFIG_IWLWIFI_DEBUGFS
514 if (bt_activity)
515 memcpy(&priv->statistics.bt_activity, bt_activity,
516 sizeof(*bt_activity));
517 #endif
518
519 priv->rx_statistics_jiffies = stamp;
520
521 set_bit(STATUS_STATISTICS, &priv->status);
522
523 /* Reschedule the statistics timer to occur in
524 * reg_recalib_period seconds to ensure we get a
525 * thermal update even if the uCode doesn't give
526 * us one */
527 mod_timer(&priv->statistics_periodic, jiffies +
528 msecs_to_jiffies(reg_recalib_period * 1000));
529
530 if (unlikely(!test_bit(STATUS_SCANNING, &priv->status)) &&
531 (pkt->hdr.cmd == STATISTICS_NOTIFICATION)) {
532 iwlagn_rx_calc_noise(priv);
533 queue_work(priv->workqueue, &priv->run_time_calib_work);
534 }
535 if (priv->lib->temperature && change)
536 priv->lib->temperature(priv);
537
538 spin_unlock(&priv->statistics.lock);
539 }
540
iwlagn_rx_reply_statistics(struct iwl_priv * priv,struct iwl_rx_cmd_buffer * rxb)541 static void iwlagn_rx_reply_statistics(struct iwl_priv *priv,
542 struct iwl_rx_cmd_buffer *rxb)
543 {
544 struct iwl_rx_packet *pkt = rxb_addr(rxb);
545 struct iwl_notif_statistics *stats = (void *)pkt->data;
546
547 if (le32_to_cpu(stats->flag) & UCODE_STATISTICS_CLEAR_MSK) {
548 #ifdef CONFIG_IWLWIFI_DEBUGFS
549 memset(&priv->accum_stats, 0,
550 sizeof(priv->accum_stats));
551 memset(&priv->delta_stats, 0,
552 sizeof(priv->delta_stats));
553 memset(&priv->max_delta_stats, 0,
554 sizeof(priv->max_delta_stats));
555 #endif
556 IWL_DEBUG_RX(priv, "Statistics have been cleared\n");
557 }
558
559 iwlagn_rx_statistics(priv, rxb);
560 }
561
562 /* Handle notification from uCode that card's power state is changing
563 * due to software, hardware, or critical temperature RFKILL */
iwlagn_rx_card_state_notif(struct iwl_priv * priv,struct iwl_rx_cmd_buffer * rxb)564 static void iwlagn_rx_card_state_notif(struct iwl_priv *priv,
565 struct iwl_rx_cmd_buffer *rxb)
566 {
567 struct iwl_rx_packet *pkt = rxb_addr(rxb);
568 struct iwl_card_state_notif *card_state_notif = (void *)pkt->data;
569 u32 flags = le32_to_cpu(card_state_notif->flags);
570 unsigned long status = priv->status;
571
572 IWL_DEBUG_RF_KILL(priv, "Card state received: HW:%s SW:%s CT:%s\n",
573 (flags & HW_CARD_DISABLED) ? "Kill" : "On",
574 (flags & SW_CARD_DISABLED) ? "Kill" : "On",
575 (flags & CT_CARD_DISABLED) ?
576 "Reached" : "Not reached");
577
578 if (flags & (SW_CARD_DISABLED | HW_CARD_DISABLED |
579 CT_CARD_DISABLED)) {
580
581 iwl_write32(priv->trans, CSR_UCODE_DRV_GP1_SET,
582 CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
583
584 iwl_write_direct32(priv->trans, HBUS_TARG_MBX_C,
585 HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
586
587 if (!(flags & RXON_CARD_DISABLED)) {
588 iwl_write32(priv->trans, CSR_UCODE_DRV_GP1_CLR,
589 CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
590 iwl_write_direct32(priv->trans, HBUS_TARG_MBX_C,
591 HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
592 }
593 if (flags & CT_CARD_DISABLED)
594 iwl_tt_enter_ct_kill(priv);
595 }
596 if (!(flags & CT_CARD_DISABLED))
597 iwl_tt_exit_ct_kill(priv);
598
599 if (flags & HW_CARD_DISABLED)
600 set_bit(STATUS_RF_KILL_HW, &priv->status);
601 else
602 clear_bit(STATUS_RF_KILL_HW, &priv->status);
603
604
605 if (!(flags & RXON_CARD_DISABLED))
606 iwl_scan_cancel(priv);
607
608 if ((test_bit(STATUS_RF_KILL_HW, &status) !=
609 test_bit(STATUS_RF_KILL_HW, &priv->status)))
610 wiphy_rfkill_set_hw_state(priv->hw->wiphy,
611 test_bit(STATUS_RF_KILL_HW, &priv->status));
612 }
613
iwlagn_rx_missed_beacon_notif(struct iwl_priv * priv,struct iwl_rx_cmd_buffer * rxb)614 static void iwlagn_rx_missed_beacon_notif(struct iwl_priv *priv,
615 struct iwl_rx_cmd_buffer *rxb)
616
617 {
618 struct iwl_rx_packet *pkt = rxb_addr(rxb);
619 struct iwl_missed_beacon_notif *missed_beacon = (void *)pkt->data;
620
621 if (le32_to_cpu(missed_beacon->consecutive_missed_beacons) >
622 priv->missed_beacon_threshold) {
623 IWL_DEBUG_CALIB(priv,
624 "missed bcn cnsq %d totl %d rcd %d expctd %d\n",
625 le32_to_cpu(missed_beacon->consecutive_missed_beacons),
626 le32_to_cpu(missed_beacon->total_missed_becons),
627 le32_to_cpu(missed_beacon->num_recvd_beacons),
628 le32_to_cpu(missed_beacon->num_expected_beacons));
629 if (!test_bit(STATUS_SCANNING, &priv->status))
630 iwl_init_sensitivity(priv);
631 }
632 }
633
634 /* Cache phy data (Rx signal strength, etc) for HT frame (REPLY_RX_PHY_CMD).
635 * This will be used later in iwl_rx_reply_rx() for REPLY_RX_MPDU_CMD. */
iwlagn_rx_reply_rx_phy(struct iwl_priv * priv,struct iwl_rx_cmd_buffer * rxb)636 static void iwlagn_rx_reply_rx_phy(struct iwl_priv *priv,
637 struct iwl_rx_cmd_buffer *rxb)
638 {
639 struct iwl_rx_packet *pkt = rxb_addr(rxb);
640
641 priv->last_phy_res_valid = true;
642 priv->ampdu_ref++;
643 memcpy(&priv->last_phy_res, pkt->data,
644 sizeof(struct iwl_rx_phy_res));
645 }
646
647 /*
648 * returns non-zero if packet should be dropped
649 */
iwlagn_set_decrypted_flag(struct iwl_priv * priv,struct ieee80211_hdr * hdr,u32 decrypt_res,struct ieee80211_rx_status * stats)650 static int iwlagn_set_decrypted_flag(struct iwl_priv *priv,
651 struct ieee80211_hdr *hdr,
652 u32 decrypt_res,
653 struct ieee80211_rx_status *stats)
654 {
655 u16 fc = le16_to_cpu(hdr->frame_control);
656
657 /*
658 * All contexts have the same setting here due to it being
659 * a module parameter, so OK to check any context.
660 */
661 if (priv->contexts[IWL_RXON_CTX_BSS].active.filter_flags &
662 RXON_FILTER_DIS_DECRYPT_MSK)
663 return 0;
664
665 if (!(fc & IEEE80211_FCTL_PROTECTED))
666 return 0;
667
668 IWL_DEBUG_RX(priv, "decrypt_res:0x%x\n", decrypt_res);
669 switch (decrypt_res & RX_RES_STATUS_SEC_TYPE_MSK) {
670 case RX_RES_STATUS_SEC_TYPE_TKIP:
671 /* The uCode has got a bad phase 1 Key, pushes the packet.
672 * Decryption will be done in SW. */
673 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
674 RX_RES_STATUS_BAD_KEY_TTAK)
675 break;
676
677 case RX_RES_STATUS_SEC_TYPE_WEP:
678 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
679 RX_RES_STATUS_BAD_ICV_MIC) {
680 /* bad ICV, the packet is destroyed since the
681 * decryption is inplace, drop it */
682 IWL_DEBUG_RX(priv, "Packet destroyed\n");
683 return -1;
684 }
685 case RX_RES_STATUS_SEC_TYPE_CCMP:
686 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
687 RX_RES_STATUS_DECRYPT_OK) {
688 IWL_DEBUG_RX(priv, "hw decrypt successfully!!!\n");
689 stats->flag |= RX_FLAG_DECRYPTED;
690 }
691 break;
692
693 default:
694 break;
695 }
696 return 0;
697 }
698
iwlagn_pass_packet_to_mac80211(struct iwl_priv * priv,struct ieee80211_hdr * hdr,u16 len,u32 ampdu_status,struct iwl_rx_cmd_buffer * rxb,struct ieee80211_rx_status * stats)699 static void iwlagn_pass_packet_to_mac80211(struct iwl_priv *priv,
700 struct ieee80211_hdr *hdr,
701 u16 len,
702 u32 ampdu_status,
703 struct iwl_rx_cmd_buffer *rxb,
704 struct ieee80211_rx_status *stats)
705 {
706 struct sk_buff *skb;
707 __le16 fc = hdr->frame_control;
708 struct iwl_rxon_context *ctx;
709 unsigned int hdrlen, fraglen;
710
711 /* We only process data packets if the interface is open */
712 if (unlikely(!priv->is_open)) {
713 IWL_DEBUG_DROP_LIMIT(priv,
714 "Dropping packet while interface is not open.\n");
715 return;
716 }
717
718 /* In case of HW accelerated crypto and bad decryption, drop */
719 if (!iwlwifi_mod_params.sw_crypto &&
720 iwlagn_set_decrypted_flag(priv, hdr, ampdu_status, stats))
721 return;
722
723 /* Dont use dev_alloc_skb(), we'll have enough headroom once
724 * ieee80211_hdr pulled.
725 */
726 skb = alloc_skb(128, GFP_ATOMIC);
727 if (!skb) {
728 IWL_ERR(priv, "alloc_skb failed\n");
729 return;
730 }
731 /* If frame is small enough to fit in skb->head, pull it completely.
732 * If not, only pull ieee80211_hdr so that splice() or TCP coalesce
733 * are more efficient.
734 */
735 hdrlen = (len <= skb_tailroom(skb)) ? len : sizeof(*hdr);
736
737 memcpy(skb_put(skb, hdrlen), hdr, hdrlen);
738 fraglen = len - hdrlen;
739
740 if (fraglen) {
741 int offset = (void *)hdr + hdrlen -
742 rxb_addr(rxb) + rxb_offset(rxb);
743
744 skb_add_rx_frag(skb, 0, rxb_steal_page(rxb), offset,
745 fraglen, rxb->truesize);
746 }
747
748 /*
749 * Wake any queues that were stopped due to a passive channel tx
750 * failure. This can happen because the regulatory enforcement in
751 * the device waits for a beacon before allowing transmission,
752 * sometimes even after already having transmitted frames for the
753 * association because the new RXON may reset the information.
754 */
755 if (unlikely(ieee80211_is_beacon(fc) && priv->passive_no_rx)) {
756 for_each_context(priv, ctx) {
757 if (!ether_addr_equal(hdr->addr3,
758 ctx->active.bssid_addr))
759 continue;
760 iwlagn_lift_passive_no_rx(priv);
761 }
762 }
763
764 memcpy(IEEE80211_SKB_RXCB(skb), stats, sizeof(*stats));
765
766 ieee80211_rx_napi(priv->hw, skb, priv->napi);
767 }
768
iwlagn_translate_rx_status(struct iwl_priv * priv,u32 decrypt_in)769 static u32 iwlagn_translate_rx_status(struct iwl_priv *priv, u32 decrypt_in)
770 {
771 u32 decrypt_out = 0;
772
773 if ((decrypt_in & RX_RES_STATUS_STATION_FOUND) ==
774 RX_RES_STATUS_STATION_FOUND)
775 decrypt_out |= (RX_RES_STATUS_STATION_FOUND |
776 RX_RES_STATUS_NO_STATION_INFO_MISMATCH);
777
778 decrypt_out |= (decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK);
779
780 /* packet was not encrypted */
781 if ((decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) ==
782 RX_RES_STATUS_SEC_TYPE_NONE)
783 return decrypt_out;
784
785 /* packet was encrypted with unknown alg */
786 if ((decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) ==
787 RX_RES_STATUS_SEC_TYPE_ERR)
788 return decrypt_out;
789
790 /* decryption was not done in HW */
791 if ((decrypt_in & RX_MPDU_RES_STATUS_DEC_DONE_MSK) !=
792 RX_MPDU_RES_STATUS_DEC_DONE_MSK)
793 return decrypt_out;
794
795 switch (decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) {
796
797 case RX_RES_STATUS_SEC_TYPE_CCMP:
798 /* alg is CCM: check MIC only */
799 if (!(decrypt_in & RX_MPDU_RES_STATUS_MIC_OK))
800 /* Bad MIC */
801 decrypt_out |= RX_RES_STATUS_BAD_ICV_MIC;
802 else
803 decrypt_out |= RX_RES_STATUS_DECRYPT_OK;
804
805 break;
806
807 case RX_RES_STATUS_SEC_TYPE_TKIP:
808 if (!(decrypt_in & RX_MPDU_RES_STATUS_TTAK_OK)) {
809 /* Bad TTAK */
810 decrypt_out |= RX_RES_STATUS_BAD_KEY_TTAK;
811 break;
812 }
813 /* fall through if TTAK OK */
814 default:
815 if (!(decrypt_in & RX_MPDU_RES_STATUS_ICV_OK))
816 decrypt_out |= RX_RES_STATUS_BAD_ICV_MIC;
817 else
818 decrypt_out |= RX_RES_STATUS_DECRYPT_OK;
819 break;
820 }
821
822 IWL_DEBUG_RX(priv, "decrypt_in:0x%x decrypt_out = 0x%x\n",
823 decrypt_in, decrypt_out);
824
825 return decrypt_out;
826 }
827
828 /* Calc max signal level (dBm) among 3 possible receivers */
iwlagn_calc_rssi(struct iwl_priv * priv,struct iwl_rx_phy_res * rx_resp)829 static int iwlagn_calc_rssi(struct iwl_priv *priv,
830 struct iwl_rx_phy_res *rx_resp)
831 {
832 /* data from PHY/DSP regarding signal strength, etc.,
833 * contents are always there, not configurable by host
834 */
835 struct iwlagn_non_cfg_phy *ncphy =
836 (struct iwlagn_non_cfg_phy *)rx_resp->non_cfg_phy_buf;
837 u32 val, rssi_a, rssi_b, rssi_c, max_rssi;
838 u8 agc;
839
840 val = le32_to_cpu(ncphy->non_cfg_phy[IWLAGN_RX_RES_AGC_IDX]);
841 agc = (val & IWLAGN_OFDM_AGC_MSK) >> IWLAGN_OFDM_AGC_BIT_POS;
842
843 /* Find max rssi among 3 possible receivers.
844 * These values are measured by the digital signal processor (DSP).
845 * They should stay fairly constant even as the signal strength varies,
846 * if the radio's automatic gain control (AGC) is working right.
847 * AGC value (see below) will provide the "interesting" info.
848 */
849 val = le32_to_cpu(ncphy->non_cfg_phy[IWLAGN_RX_RES_RSSI_AB_IDX]);
850 rssi_a = (val & IWLAGN_OFDM_RSSI_INBAND_A_BITMSK) >>
851 IWLAGN_OFDM_RSSI_A_BIT_POS;
852 rssi_b = (val & IWLAGN_OFDM_RSSI_INBAND_B_BITMSK) >>
853 IWLAGN_OFDM_RSSI_B_BIT_POS;
854 val = le32_to_cpu(ncphy->non_cfg_phy[IWLAGN_RX_RES_RSSI_C_IDX]);
855 rssi_c = (val & IWLAGN_OFDM_RSSI_INBAND_C_BITMSK) >>
856 IWLAGN_OFDM_RSSI_C_BIT_POS;
857
858 max_rssi = max_t(u32, rssi_a, rssi_b);
859 max_rssi = max_t(u32, max_rssi, rssi_c);
860
861 IWL_DEBUG_STATS(priv, "Rssi In A %d B %d C %d Max %d AGC dB %d\n",
862 rssi_a, rssi_b, rssi_c, max_rssi, agc);
863
864 /* dBm = max_rssi dB - agc dB - constant.
865 * Higher AGC (higher radio gain) means lower signal. */
866 return max_rssi - agc - IWLAGN_RSSI_OFFSET;
867 }
868
869 /* Called for REPLY_RX_MPDU_CMD */
iwlagn_rx_reply_rx(struct iwl_priv * priv,struct iwl_rx_cmd_buffer * rxb)870 static void iwlagn_rx_reply_rx(struct iwl_priv *priv,
871 struct iwl_rx_cmd_buffer *rxb)
872 {
873 struct ieee80211_hdr *header;
874 struct ieee80211_rx_status rx_status = {};
875 struct iwl_rx_packet *pkt = rxb_addr(rxb);
876 struct iwl_rx_phy_res *phy_res;
877 __le32 rx_pkt_status;
878 struct iwl_rx_mpdu_res_start *amsdu;
879 u32 len;
880 u32 ampdu_status;
881 u32 rate_n_flags;
882
883 if (!priv->last_phy_res_valid) {
884 IWL_ERR(priv, "MPDU frame without cached PHY data\n");
885 return;
886 }
887 phy_res = &priv->last_phy_res;
888 amsdu = (struct iwl_rx_mpdu_res_start *)pkt->data;
889 header = (struct ieee80211_hdr *)(pkt->data + sizeof(*amsdu));
890 len = le16_to_cpu(amsdu->byte_count);
891 rx_pkt_status = *(__le32 *)(pkt->data + sizeof(*amsdu) + len);
892 ampdu_status = iwlagn_translate_rx_status(priv,
893 le32_to_cpu(rx_pkt_status));
894
895 if ((unlikely(phy_res->cfg_phy_cnt > 20))) {
896 IWL_DEBUG_DROP(priv, "dsp size out of range [0,20]: %d\n",
897 phy_res->cfg_phy_cnt);
898 return;
899 }
900
901 if (!(rx_pkt_status & RX_RES_STATUS_NO_CRC32_ERROR) ||
902 !(rx_pkt_status & RX_RES_STATUS_NO_RXE_OVERFLOW)) {
903 IWL_DEBUG_RX(priv, "Bad CRC or FIFO: 0x%08X.\n",
904 le32_to_cpu(rx_pkt_status));
905 return;
906 }
907
908 /* This will be used in several places later */
909 rate_n_flags = le32_to_cpu(phy_res->rate_n_flags);
910
911 /* rx_status carries information about the packet to mac80211 */
912 rx_status.mactime = le64_to_cpu(phy_res->timestamp);
913 rx_status.band = (phy_res->phy_flags & RX_RES_PHY_FLAGS_BAND_24_MSK) ?
914 IEEE80211_BAND_2GHZ : IEEE80211_BAND_5GHZ;
915 rx_status.freq =
916 ieee80211_channel_to_frequency(le16_to_cpu(phy_res->channel),
917 rx_status.band);
918 rx_status.rate_idx =
919 iwlagn_hwrate_to_mac80211_idx(rate_n_flags, rx_status.band);
920 rx_status.flag = 0;
921
922 /* TSF isn't reliable. In order to allow smooth user experience,
923 * this W/A doesn't propagate it to the mac80211 */
924 /*rx_status.flag |= RX_FLAG_MACTIME_START;*/
925
926 priv->ucode_beacon_time = le32_to_cpu(phy_res->beacon_time_stamp);
927
928 /* Find max signal strength (dBm) among 3 antenna/receiver chains */
929 rx_status.signal = iwlagn_calc_rssi(priv, phy_res);
930
931 IWL_DEBUG_STATS_LIMIT(priv, "Rssi %d, TSF %llu\n",
932 rx_status.signal, (unsigned long long)rx_status.mactime);
933
934 /*
935 * "antenna number"
936 *
937 * It seems that the antenna field in the phy flags value
938 * is actually a bit field. This is undefined by radiotap,
939 * it wants an actual antenna number but I always get "7"
940 * for most legacy frames I receive indicating that the
941 * same frame was received on all three RX chains.
942 *
943 * I think this field should be removed in favor of a
944 * new 802.11n radiotap field "RX chains" that is defined
945 * as a bitmask.
946 */
947 rx_status.antenna =
948 (le16_to_cpu(phy_res->phy_flags) & RX_RES_PHY_FLAGS_ANTENNA_MSK)
949 >> RX_RES_PHY_FLAGS_ANTENNA_POS;
950
951 /* set the preamble flag if appropriate */
952 if (phy_res->phy_flags & RX_RES_PHY_FLAGS_SHORT_PREAMBLE_MSK)
953 rx_status.flag |= RX_FLAG_SHORTPRE;
954
955 if (phy_res->phy_flags & RX_RES_PHY_FLAGS_AGG_MSK) {
956 /*
957 * We know which subframes of an A-MPDU belong
958 * together since we get a single PHY response
959 * from the firmware for all of them
960 */
961 rx_status.flag |= RX_FLAG_AMPDU_DETAILS;
962 rx_status.ampdu_reference = priv->ampdu_ref;
963 }
964
965 /* Set up the HT phy flags */
966 if (rate_n_flags & RATE_MCS_HT_MSK)
967 rx_status.flag |= RX_FLAG_HT;
968 if (rate_n_flags & RATE_MCS_HT40_MSK)
969 rx_status.flag |= RX_FLAG_40MHZ;
970 if (rate_n_flags & RATE_MCS_SGI_MSK)
971 rx_status.flag |= RX_FLAG_SHORT_GI;
972 if (rate_n_flags & RATE_MCS_GF_MSK)
973 rx_status.flag |= RX_FLAG_HT_GF;
974
975 iwlagn_pass_packet_to_mac80211(priv, header, len, ampdu_status,
976 rxb, &rx_status);
977 }
978
iwlagn_rx_noa_notification(struct iwl_priv * priv,struct iwl_rx_cmd_buffer * rxb)979 static void iwlagn_rx_noa_notification(struct iwl_priv *priv,
980 struct iwl_rx_cmd_buffer *rxb)
981 {
982 struct iwl_wipan_noa_data *new_data, *old_data;
983 struct iwl_rx_packet *pkt = rxb_addr(rxb);
984 struct iwl_wipan_noa_notification *noa_notif = (void *)pkt->data;
985
986 /* no condition -- we're in softirq */
987 old_data = rcu_dereference_protected(priv->noa_data, true);
988
989 if (noa_notif->noa_active) {
990 u32 len = le16_to_cpu(noa_notif->noa_attribute.length);
991 u32 copylen = len;
992
993 /* EID, len, OUI, subtype */
994 len += 1 + 1 + 3 + 1;
995 /* P2P id, P2P length */
996 len += 1 + 2;
997 copylen += 1 + 2;
998
999 new_data = kmalloc(sizeof(*new_data) + len, GFP_ATOMIC);
1000 if (new_data) {
1001 new_data->length = len;
1002 new_data->data[0] = WLAN_EID_VENDOR_SPECIFIC;
1003 new_data->data[1] = len - 2; /* not counting EID, len */
1004 new_data->data[2] = (WLAN_OUI_WFA >> 16) & 0xff;
1005 new_data->data[3] = (WLAN_OUI_WFA >> 8) & 0xff;
1006 new_data->data[4] = (WLAN_OUI_WFA >> 0) & 0xff;
1007 new_data->data[5] = WLAN_OUI_TYPE_WFA_P2P;
1008 memcpy(&new_data->data[6], &noa_notif->noa_attribute,
1009 copylen);
1010 }
1011 } else
1012 new_data = NULL;
1013
1014 rcu_assign_pointer(priv->noa_data, new_data);
1015
1016 if (old_data)
1017 kfree_rcu(old_data, rcu_head);
1018 }
1019
1020 /**
1021 * iwl_setup_rx_handlers - Initialize Rx handler callbacks
1022 *
1023 * Setup the RX handlers for each of the reply types sent from the uCode
1024 * to the host.
1025 */
iwl_setup_rx_handlers(struct iwl_priv * priv)1026 void iwl_setup_rx_handlers(struct iwl_priv *priv)
1027 {
1028 void (**handlers)(struct iwl_priv *priv, struct iwl_rx_cmd_buffer *rxb);
1029
1030 handlers = priv->rx_handlers;
1031
1032 handlers[REPLY_ERROR] = iwlagn_rx_reply_error;
1033 handlers[CHANNEL_SWITCH_NOTIFICATION] = iwlagn_rx_csa;
1034 handlers[SPECTRUM_MEASURE_NOTIFICATION] =
1035 iwlagn_rx_spectrum_measure_notif;
1036 handlers[PM_SLEEP_NOTIFICATION] = iwlagn_rx_pm_sleep_notif;
1037 handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
1038 iwlagn_rx_pm_debug_statistics_notif;
1039 handlers[BEACON_NOTIFICATION] = iwlagn_rx_beacon_notif;
1040 handlers[REPLY_ADD_STA] = iwl_add_sta_callback;
1041
1042 handlers[REPLY_WIPAN_NOA_NOTIFICATION] = iwlagn_rx_noa_notification;
1043
1044 /*
1045 * The same handler is used for both the REPLY to a discrete
1046 * statistics request from the host as well as for the periodic
1047 * statistics notifications (after received beacons) from the uCode.
1048 */
1049 handlers[REPLY_STATISTICS_CMD] = iwlagn_rx_reply_statistics;
1050 handlers[STATISTICS_NOTIFICATION] = iwlagn_rx_statistics;
1051
1052 iwl_setup_rx_scan_handlers(priv);
1053
1054 handlers[CARD_STATE_NOTIFICATION] = iwlagn_rx_card_state_notif;
1055 handlers[MISSED_BEACONS_NOTIFICATION] =
1056 iwlagn_rx_missed_beacon_notif;
1057
1058 /* Rx handlers */
1059 handlers[REPLY_RX_PHY_CMD] = iwlagn_rx_reply_rx_phy;
1060 handlers[REPLY_RX_MPDU_CMD] = iwlagn_rx_reply_rx;
1061
1062 /* block ack */
1063 handlers[REPLY_COMPRESSED_BA] =
1064 iwlagn_rx_reply_compressed_ba;
1065
1066 priv->rx_handlers[REPLY_TX] = iwlagn_rx_reply_tx;
1067
1068 /* set up notification wait support */
1069 iwl_notification_wait_init(&priv->notif_wait);
1070
1071 /* Set up BT Rx handlers */
1072 if (priv->lib->bt_params)
1073 iwlagn_bt_rx_handler_setup(priv);
1074 }
1075
iwl_rx_dispatch(struct iwl_op_mode * op_mode,struct napi_struct * napi,struct iwl_rx_cmd_buffer * rxb)1076 void iwl_rx_dispatch(struct iwl_op_mode *op_mode, struct napi_struct *napi,
1077 struct iwl_rx_cmd_buffer *rxb)
1078 {
1079 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1080 struct iwl_priv *priv = IWL_OP_MODE_GET_DVM(op_mode);
1081
1082 /*
1083 * Do the notification wait before RX handlers so
1084 * even if the RX handler consumes the RXB we have
1085 * access to it in the notification wait entry.
1086 */
1087 iwl_notification_wait_notify(&priv->notif_wait, pkt);
1088
1089 /* Based on type of command response or notification,
1090 * handle those that need handling via function in
1091 * rx_handlers table. See iwl_setup_rx_handlers() */
1092 if (priv->rx_handlers[pkt->hdr.cmd]) {
1093 priv->rx_handlers_stats[pkt->hdr.cmd]++;
1094 priv->rx_handlers[pkt->hdr.cmd](priv, rxb);
1095 } else {
1096 /* No handling needed */
1097 IWL_DEBUG_RX(priv, "No handler needed for %s, 0x%02x\n",
1098 iwl_dvm_get_cmd_string(pkt->hdr.cmd),
1099 pkt->hdr.cmd);
1100 }
1101 }
1102