1 /******************************************************************************
2 *
3 * Copyright(c) 2003 - 2012 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-eeprom.h"
36 #include "iwl-dev.h"
37 #include "iwl-core.h"
38 #include "iwl-io.h"
39 #include "iwl-agn-calib.h"
40 #include "iwl-agn.h"
41 #include "iwl-shared.h"
42
get_cmd_string(u8 cmd)43 const char *get_cmd_string(u8 cmd)
44 {
45 switch (cmd) {
46 IWL_CMD(REPLY_ALIVE);
47 IWL_CMD(REPLY_ERROR);
48 IWL_CMD(REPLY_ECHO);
49 IWL_CMD(REPLY_RXON);
50 IWL_CMD(REPLY_RXON_ASSOC);
51 IWL_CMD(REPLY_QOS_PARAM);
52 IWL_CMD(REPLY_RXON_TIMING);
53 IWL_CMD(REPLY_ADD_STA);
54 IWL_CMD(REPLY_REMOVE_STA);
55 IWL_CMD(REPLY_REMOVE_ALL_STA);
56 IWL_CMD(REPLY_TXFIFO_FLUSH);
57 IWL_CMD(REPLY_WEPKEY);
58 IWL_CMD(REPLY_TX);
59 IWL_CMD(REPLY_LEDS_CMD);
60 IWL_CMD(REPLY_TX_LINK_QUALITY_CMD);
61 IWL_CMD(COEX_PRIORITY_TABLE_CMD);
62 IWL_CMD(COEX_MEDIUM_NOTIFICATION);
63 IWL_CMD(COEX_EVENT_CMD);
64 IWL_CMD(REPLY_QUIET_CMD);
65 IWL_CMD(REPLY_CHANNEL_SWITCH);
66 IWL_CMD(CHANNEL_SWITCH_NOTIFICATION);
67 IWL_CMD(REPLY_SPECTRUM_MEASUREMENT_CMD);
68 IWL_CMD(SPECTRUM_MEASURE_NOTIFICATION);
69 IWL_CMD(POWER_TABLE_CMD);
70 IWL_CMD(PM_SLEEP_NOTIFICATION);
71 IWL_CMD(PM_DEBUG_STATISTIC_NOTIFIC);
72 IWL_CMD(REPLY_SCAN_CMD);
73 IWL_CMD(REPLY_SCAN_ABORT_CMD);
74 IWL_CMD(SCAN_START_NOTIFICATION);
75 IWL_CMD(SCAN_RESULTS_NOTIFICATION);
76 IWL_CMD(SCAN_COMPLETE_NOTIFICATION);
77 IWL_CMD(BEACON_NOTIFICATION);
78 IWL_CMD(REPLY_TX_BEACON);
79 IWL_CMD(WHO_IS_AWAKE_NOTIFICATION);
80 IWL_CMD(QUIET_NOTIFICATION);
81 IWL_CMD(REPLY_TX_PWR_TABLE_CMD);
82 IWL_CMD(MEASURE_ABORT_NOTIFICATION);
83 IWL_CMD(REPLY_BT_CONFIG);
84 IWL_CMD(REPLY_STATISTICS_CMD);
85 IWL_CMD(STATISTICS_NOTIFICATION);
86 IWL_CMD(REPLY_CARD_STATE_CMD);
87 IWL_CMD(CARD_STATE_NOTIFICATION);
88 IWL_CMD(MISSED_BEACONS_NOTIFICATION);
89 IWL_CMD(REPLY_CT_KILL_CONFIG_CMD);
90 IWL_CMD(SENSITIVITY_CMD);
91 IWL_CMD(REPLY_PHY_CALIBRATION_CMD);
92 IWL_CMD(REPLY_RX_PHY_CMD);
93 IWL_CMD(REPLY_RX_MPDU_CMD);
94 IWL_CMD(REPLY_RX);
95 IWL_CMD(REPLY_COMPRESSED_BA);
96 IWL_CMD(CALIBRATION_CFG_CMD);
97 IWL_CMD(CALIBRATION_RES_NOTIFICATION);
98 IWL_CMD(CALIBRATION_COMPLETE_NOTIFICATION);
99 IWL_CMD(REPLY_TX_POWER_DBM_CMD);
100 IWL_CMD(TEMPERATURE_NOTIFICATION);
101 IWL_CMD(TX_ANT_CONFIGURATION_CMD);
102 IWL_CMD(REPLY_BT_COEX_PROFILE_NOTIF);
103 IWL_CMD(REPLY_BT_COEX_PRIO_TABLE);
104 IWL_CMD(REPLY_BT_COEX_PROT_ENV);
105 IWL_CMD(REPLY_WIPAN_PARAMS);
106 IWL_CMD(REPLY_WIPAN_RXON);
107 IWL_CMD(REPLY_WIPAN_RXON_TIMING);
108 IWL_CMD(REPLY_WIPAN_RXON_ASSOC);
109 IWL_CMD(REPLY_WIPAN_QOS_PARAM);
110 IWL_CMD(REPLY_WIPAN_WEPKEY);
111 IWL_CMD(REPLY_WIPAN_P2P_CHANNEL_SWITCH);
112 IWL_CMD(REPLY_WIPAN_NOA_NOTIFICATION);
113 IWL_CMD(REPLY_WIPAN_DEACTIVATION_COMPLETE);
114 IWL_CMD(REPLY_WOWLAN_PATTERNS);
115 IWL_CMD(REPLY_WOWLAN_WAKEUP_FILTER);
116 IWL_CMD(REPLY_WOWLAN_TSC_RSC_PARAMS);
117 IWL_CMD(REPLY_WOWLAN_TKIP_PARAMS);
118 IWL_CMD(REPLY_WOWLAN_KEK_KCK_MATERIAL);
119 IWL_CMD(REPLY_WOWLAN_GET_STATUS);
120 IWL_CMD(REPLY_D3_CONFIG);
121 default:
122 return "UNKNOWN";
123
124 }
125 }
126
127 /******************************************************************************
128 *
129 * Generic RX handler implementations
130 *
131 ******************************************************************************/
132
iwlagn_rx_reply_error(struct iwl_priv * priv,struct iwl_rx_cmd_buffer * rxb,struct iwl_device_cmd * cmd)133 static int iwlagn_rx_reply_error(struct iwl_priv *priv,
134 struct iwl_rx_cmd_buffer *rxb,
135 struct iwl_device_cmd *cmd)
136 {
137 struct iwl_rx_packet *pkt = rxb_addr(rxb);
138 struct iwl_error_resp *err_resp = (void *)pkt->data;
139
140 IWL_ERR(priv, "Error Reply type 0x%08X cmd %s (0x%02X) "
141 "seq 0x%04X ser 0x%08X\n",
142 le32_to_cpu(err_resp->error_type),
143 get_cmd_string(err_resp->cmd_id),
144 err_resp->cmd_id,
145 le16_to_cpu(err_resp->bad_cmd_seq_num),
146 le32_to_cpu(err_resp->error_info));
147 return 0;
148 }
149
iwlagn_rx_csa(struct iwl_priv * priv,struct iwl_rx_cmd_buffer * rxb,struct iwl_device_cmd * cmd)150 static int iwlagn_rx_csa(struct iwl_priv *priv, struct iwl_rx_cmd_buffer *rxb,
151 struct iwl_device_cmd *cmd)
152 {
153 struct iwl_rx_packet *pkt = rxb_addr(rxb);
154 struct iwl_csa_notification *csa = (void *)pkt->data;
155 /*
156 * MULTI-FIXME
157 * See iwlagn_mac_channel_switch.
158 */
159 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
160 struct iwl_rxon_cmd *rxon = (void *)&ctx->active;
161
162 if (!test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status))
163 return 0;
164
165 if (!le32_to_cpu(csa->status) && csa->channel == priv->switch_channel) {
166 rxon->channel = csa->channel;
167 ctx->staging.channel = csa->channel;
168 IWL_DEBUG_11H(priv, "CSA notif: channel %d\n",
169 le16_to_cpu(csa->channel));
170 iwl_chswitch_done(priv, true);
171 } else {
172 IWL_ERR(priv, "CSA notif (fail) : channel %d\n",
173 le16_to_cpu(csa->channel));
174 iwl_chswitch_done(priv, false);
175 }
176 return 0;
177 }
178
179
iwlagn_rx_spectrum_measure_notif(struct iwl_priv * priv,struct iwl_rx_cmd_buffer * rxb,struct iwl_device_cmd * cmd)180 static int iwlagn_rx_spectrum_measure_notif(struct iwl_priv *priv,
181 struct iwl_rx_cmd_buffer *rxb,
182 struct iwl_device_cmd *cmd)
183 {
184 struct iwl_rx_packet *pkt = rxb_addr(rxb);
185 struct iwl_spectrum_notification *report = (void *)pkt->data;
186
187 if (!report->state) {
188 IWL_DEBUG_11H(priv,
189 "Spectrum Measure Notification: Start\n");
190 return 0;
191 }
192
193 memcpy(&priv->measure_report, report, sizeof(*report));
194 priv->measurement_status |= MEASUREMENT_READY;
195 return 0;
196 }
197
iwlagn_rx_pm_sleep_notif(struct iwl_priv * priv,struct iwl_rx_cmd_buffer * rxb,struct iwl_device_cmd * cmd)198 static int iwlagn_rx_pm_sleep_notif(struct iwl_priv *priv,
199 struct iwl_rx_cmd_buffer *rxb,
200 struct iwl_device_cmd *cmd)
201 {
202 #ifdef CONFIG_IWLWIFI_DEBUG
203 struct iwl_rx_packet *pkt = rxb_addr(rxb);
204 struct iwl_sleep_notification *sleep = (void *)pkt->data;
205 IWL_DEBUG_RX(priv, "sleep mode: %d, src: %d\n",
206 sleep->pm_sleep_mode, sleep->pm_wakeup_src);
207 #endif
208 return 0;
209 }
210
iwlagn_rx_pm_debug_statistics_notif(struct iwl_priv * priv,struct iwl_rx_cmd_buffer * rxb,struct iwl_device_cmd * cmd)211 static int iwlagn_rx_pm_debug_statistics_notif(struct iwl_priv *priv,
212 struct iwl_rx_cmd_buffer *rxb,
213 struct iwl_device_cmd *cmd)
214 {
215 struct iwl_rx_packet *pkt = rxb_addr(rxb);
216 u32 __maybe_unused len =
217 le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK;
218 IWL_DEBUG_RADIO(priv, "Dumping %d bytes of unhandled "
219 "notification for %s:\n", len,
220 get_cmd_string(pkt->hdr.cmd));
221 iwl_print_hex_dump(priv, IWL_DL_RADIO, pkt->data, len);
222 return 0;
223 }
224
iwlagn_rx_beacon_notif(struct iwl_priv * priv,struct iwl_rx_cmd_buffer * rxb,struct iwl_device_cmd * cmd)225 static int iwlagn_rx_beacon_notif(struct iwl_priv *priv,
226 struct iwl_rx_cmd_buffer *rxb,
227 struct iwl_device_cmd *cmd)
228 {
229 struct iwl_rx_packet *pkt = rxb_addr(rxb);
230 struct iwlagn_beacon_notif *beacon = (void *)pkt->data;
231 #ifdef CONFIG_IWLWIFI_DEBUG
232 u16 status = le16_to_cpu(beacon->beacon_notify_hdr.status.status);
233 u8 rate = iwl_hw_get_rate(beacon->beacon_notify_hdr.rate_n_flags);
234
235 IWL_DEBUG_RX(priv, "beacon status %#x, retries:%d ibssmgr:%d "
236 "tsf:0x%.8x%.8x rate:%d\n",
237 status & TX_STATUS_MSK,
238 beacon->beacon_notify_hdr.failure_frame,
239 le32_to_cpu(beacon->ibss_mgr_status),
240 le32_to_cpu(beacon->high_tsf),
241 le32_to_cpu(beacon->low_tsf), rate);
242 #endif
243
244 priv->ibss_manager = le32_to_cpu(beacon->ibss_mgr_status);
245
246 return 0;
247 }
248
249 /* the threshold ratio of actual_ack_cnt to expected_ack_cnt in percent */
250 #define ACK_CNT_RATIO (50)
251 #define BA_TIMEOUT_CNT (5)
252 #define BA_TIMEOUT_MAX (16)
253
254 /**
255 * iwl_good_ack_health - checks for ACK count ratios, BA timeout retries.
256 *
257 * When the ACK count ratio is low and aggregated BA timeout retries exceeding
258 * the BA_TIMEOUT_MAX, reload firmware and bring system back to normal
259 * operation state.
260 */
iwlagn_good_ack_health(struct iwl_priv * priv,struct statistics_tx * cur)261 static bool iwlagn_good_ack_health(struct iwl_priv *priv,
262 struct statistics_tx *cur)
263 {
264 int actual_delta, expected_delta, ba_timeout_delta;
265 struct statistics_tx *old;
266
267 if (priv->agg_tids_count)
268 return true;
269
270 lockdep_assert_held(&priv->statistics.lock);
271
272 old = &priv->statistics.tx;
273
274 actual_delta = le32_to_cpu(cur->actual_ack_cnt) -
275 le32_to_cpu(old->actual_ack_cnt);
276 expected_delta = le32_to_cpu(cur->expected_ack_cnt) -
277 le32_to_cpu(old->expected_ack_cnt);
278
279 /* Values should not be negative, but we do not trust the firmware */
280 if (actual_delta <= 0 || expected_delta <= 0)
281 return true;
282
283 ba_timeout_delta = le32_to_cpu(cur->agg.ba_timeout) -
284 le32_to_cpu(old->agg.ba_timeout);
285
286 if ((actual_delta * 100 / expected_delta) < ACK_CNT_RATIO &&
287 ba_timeout_delta > BA_TIMEOUT_CNT) {
288 IWL_DEBUG_RADIO(priv,
289 "deltas: actual %d expected %d ba_timeout %d\n",
290 actual_delta, expected_delta, ba_timeout_delta);
291
292 #ifdef CONFIG_IWLWIFI_DEBUGFS
293 /*
294 * This is ifdef'ed on DEBUGFS because otherwise the
295 * statistics aren't available. If DEBUGFS is set but
296 * DEBUG is not, these will just compile out.
297 */
298 IWL_DEBUG_RADIO(priv, "rx_detected_cnt delta %d\n",
299 priv->delta_stats.tx.rx_detected_cnt);
300 IWL_DEBUG_RADIO(priv,
301 "ack_or_ba_timeout_collision delta %d\n",
302 priv->delta_stats.tx.ack_or_ba_timeout_collision);
303 #endif
304
305 if (ba_timeout_delta >= BA_TIMEOUT_MAX)
306 return false;
307 }
308
309 return true;
310 }
311
312 /**
313 * iwl_good_plcp_health - checks for plcp error.
314 *
315 * When the plcp error is exceeding the thresholds, reset the radio
316 * to improve the throughput.
317 */
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)318 static bool iwlagn_good_plcp_health(struct iwl_priv *priv,
319 struct statistics_rx_phy *cur_ofdm,
320 struct statistics_rx_ht_phy *cur_ofdm_ht,
321 unsigned int msecs)
322 {
323 int delta;
324 int threshold = priv->plcp_delta_threshold;
325
326 if (threshold == IWL_MAX_PLCP_ERR_THRESHOLD_DISABLE) {
327 IWL_DEBUG_RADIO(priv, "plcp_err check disabled\n");
328 return true;
329 }
330
331 delta = le32_to_cpu(cur_ofdm->plcp_err) -
332 le32_to_cpu(priv->statistics.rx_ofdm.plcp_err) +
333 le32_to_cpu(cur_ofdm_ht->plcp_err) -
334 le32_to_cpu(priv->statistics.rx_ofdm_ht.plcp_err);
335
336 /* Can be negative if firmware reset statistics */
337 if (delta <= 0)
338 return true;
339
340 if ((delta * 100 / msecs) > threshold) {
341 IWL_DEBUG_RADIO(priv,
342 "plcp health threshold %u delta %d msecs %u\n",
343 threshold, delta, msecs);
344 return false;
345 }
346
347 return true;
348 }
349
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)350 static void iwlagn_recover_from_statistics(struct iwl_priv *priv,
351 struct statistics_rx_phy *cur_ofdm,
352 struct statistics_rx_ht_phy *cur_ofdm_ht,
353 struct statistics_tx *tx,
354 unsigned long stamp)
355 {
356 unsigned int msecs;
357
358 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
359 return;
360
361 msecs = jiffies_to_msecs(stamp - priv->rx_statistics_jiffies);
362
363 /* Only gather statistics and update time stamp when not associated */
364 if (!iwl_is_any_associated(priv))
365 return;
366
367 /* Do not check/recover when do not have enough statistics data */
368 if (msecs < 99)
369 return;
370
371 if (iwlagn_mod_params.ack_check && !iwlagn_good_ack_health(priv, tx)) {
372 IWL_ERR(priv, "low ack count detected, restart firmware\n");
373 if (!iwl_force_reset(priv, IWL_FW_RESET, false))
374 return;
375 }
376
377 if (iwlagn_mod_params.plcp_check &&
378 !iwlagn_good_plcp_health(priv, cur_ofdm, cur_ofdm_ht, msecs))
379 iwl_force_reset(priv, IWL_RF_RESET, false);
380 }
381
382 /* Calculate noise level, based on measurements during network silence just
383 * before arriving beacon. This measurement can be done only if we know
384 * exactly when to expect beacons, therefore only when we're associated. */
iwlagn_rx_calc_noise(struct iwl_priv * priv)385 static void iwlagn_rx_calc_noise(struct iwl_priv *priv)
386 {
387 struct statistics_rx_non_phy *rx_info;
388 int num_active_rx = 0;
389 int total_silence = 0;
390 int bcn_silence_a, bcn_silence_b, bcn_silence_c;
391 int last_rx_noise;
392
393 rx_info = &priv->statistics.rx_non_phy;
394
395 bcn_silence_a =
396 le32_to_cpu(rx_info->beacon_silence_rssi_a) & IN_BAND_FILTER;
397 bcn_silence_b =
398 le32_to_cpu(rx_info->beacon_silence_rssi_b) & IN_BAND_FILTER;
399 bcn_silence_c =
400 le32_to_cpu(rx_info->beacon_silence_rssi_c) & IN_BAND_FILTER;
401
402 if (bcn_silence_a) {
403 total_silence += bcn_silence_a;
404 num_active_rx++;
405 }
406 if (bcn_silence_b) {
407 total_silence += bcn_silence_b;
408 num_active_rx++;
409 }
410 if (bcn_silence_c) {
411 total_silence += bcn_silence_c;
412 num_active_rx++;
413 }
414
415 /* Average among active antennas */
416 if (num_active_rx)
417 last_rx_noise = (total_silence / num_active_rx) - 107;
418 else
419 last_rx_noise = IWL_NOISE_MEAS_NOT_AVAILABLE;
420
421 IWL_DEBUG_CALIB(priv, "inband silence a %u, b %u, c %u, dBm %d\n",
422 bcn_silence_a, bcn_silence_b, bcn_silence_c,
423 last_rx_noise);
424 }
425
426 #ifdef CONFIG_IWLWIFI_DEBUGFS
427 /*
428 * based on the assumption of all statistics counter are in DWORD
429 * FIXME: This function is for debugging, do not deal with
430 * the case of counters roll-over.
431 */
accum_stats(__le32 * prev,__le32 * cur,__le32 * delta,__le32 * max_delta,__le32 * accum,int size)432 static void accum_stats(__le32 *prev, __le32 *cur, __le32 *delta,
433 __le32 *max_delta, __le32 *accum, int size)
434 {
435 int i;
436
437 for (i = 0;
438 i < size / sizeof(__le32);
439 i++, prev++, cur++, delta++, max_delta++, accum++) {
440 if (le32_to_cpu(*cur) > le32_to_cpu(*prev)) {
441 *delta = cpu_to_le32(
442 le32_to_cpu(*cur) - le32_to_cpu(*prev));
443 le32_add_cpu(accum, le32_to_cpu(*delta));
444 if (le32_to_cpu(*delta) > le32_to_cpu(*max_delta))
445 *max_delta = *delta;
446 }
447 }
448 }
449
450 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)451 iwlagn_accumulative_statistics(struct iwl_priv *priv,
452 struct statistics_general_common *common,
453 struct statistics_rx_non_phy *rx_non_phy,
454 struct statistics_rx_phy *rx_ofdm,
455 struct statistics_rx_ht_phy *rx_ofdm_ht,
456 struct statistics_rx_phy *rx_cck,
457 struct statistics_tx *tx,
458 struct statistics_bt_activity *bt_activity)
459 {
460 #define ACCUM(_name) \
461 accum_stats((__le32 *)&priv->statistics._name, \
462 (__le32 *)_name, \
463 (__le32 *)&priv->delta_stats._name, \
464 (__le32 *)&priv->max_delta_stats._name, \
465 (__le32 *)&priv->accum_stats._name, \
466 sizeof(*_name));
467
468 ACCUM(common);
469 ACCUM(rx_non_phy);
470 ACCUM(rx_ofdm);
471 ACCUM(rx_ofdm_ht);
472 ACCUM(rx_cck);
473 ACCUM(tx);
474 if (bt_activity)
475 ACCUM(bt_activity);
476 #undef ACCUM
477 }
478 #else
479 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)480 iwlagn_accumulative_statistics(struct iwl_priv *priv,
481 struct statistics_general_common *common,
482 struct statistics_rx_non_phy *rx_non_phy,
483 struct statistics_rx_phy *rx_ofdm,
484 struct statistics_rx_ht_phy *rx_ofdm_ht,
485 struct statistics_rx_phy *rx_cck,
486 struct statistics_tx *tx,
487 struct statistics_bt_activity *bt_activity)
488 {
489 }
490 #endif
491
iwlagn_rx_statistics(struct iwl_priv * priv,struct iwl_rx_cmd_buffer * rxb,struct iwl_device_cmd * cmd)492 static int iwlagn_rx_statistics(struct iwl_priv *priv,
493 struct iwl_rx_cmd_buffer *rxb,
494 struct iwl_device_cmd *cmd)
495 {
496 unsigned long stamp = jiffies;
497 const int reg_recalib_period = 60;
498 int change;
499 struct iwl_rx_packet *pkt = rxb_addr(rxb);
500 u32 len = le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK;
501 __le32 *flag;
502 struct statistics_general_common *common;
503 struct statistics_rx_non_phy *rx_non_phy;
504 struct statistics_rx_phy *rx_ofdm;
505 struct statistics_rx_ht_phy *rx_ofdm_ht;
506 struct statistics_rx_phy *rx_cck;
507 struct statistics_tx *tx;
508 struct statistics_bt_activity *bt_activity;
509
510 len -= sizeof(struct iwl_cmd_header); /* skip header */
511
512 IWL_DEBUG_RX(priv, "Statistics notification received (%d bytes).\n",
513 len);
514
515 spin_lock(&priv->statistics.lock);
516
517 if (len == sizeof(struct iwl_bt_notif_statistics)) {
518 struct iwl_bt_notif_statistics *stats;
519 stats = (void *)&pkt->data;
520 flag = &stats->flag;
521 common = &stats->general.common;
522 rx_non_phy = &stats->rx.general.common;
523 rx_ofdm = &stats->rx.ofdm;
524 rx_ofdm_ht = &stats->rx.ofdm_ht;
525 rx_cck = &stats->rx.cck;
526 tx = &stats->tx;
527 bt_activity = &stats->general.activity;
528
529 #ifdef CONFIG_IWLWIFI_DEBUGFS
530 /* handle this exception directly */
531 priv->statistics.num_bt_kills = stats->rx.general.num_bt_kills;
532 le32_add_cpu(&priv->statistics.accum_num_bt_kills,
533 le32_to_cpu(stats->rx.general.num_bt_kills));
534 #endif
535 } else if (len == sizeof(struct iwl_notif_statistics)) {
536 struct iwl_notif_statistics *stats;
537 stats = (void *)&pkt->data;
538 flag = &stats->flag;
539 common = &stats->general.common;
540 rx_non_phy = &stats->rx.general;
541 rx_ofdm = &stats->rx.ofdm;
542 rx_ofdm_ht = &stats->rx.ofdm_ht;
543 rx_cck = &stats->rx.cck;
544 tx = &stats->tx;
545 bt_activity = NULL;
546 } else {
547 WARN_ONCE(1, "len %d doesn't match BT (%zu) or normal (%zu)\n",
548 len, sizeof(struct iwl_bt_notif_statistics),
549 sizeof(struct iwl_notif_statistics));
550 spin_unlock(&priv->statistics.lock);
551 return 0;
552 }
553
554 change = common->temperature != priv->statistics.common.temperature ||
555 (*flag & STATISTICS_REPLY_FLG_HT40_MODE_MSK) !=
556 (priv->statistics.flag & STATISTICS_REPLY_FLG_HT40_MODE_MSK);
557
558 iwlagn_accumulative_statistics(priv, common, rx_non_phy, rx_ofdm,
559 rx_ofdm_ht, rx_cck, tx, bt_activity);
560
561 iwlagn_recover_from_statistics(priv, rx_ofdm, rx_ofdm_ht, tx, stamp);
562
563 priv->statistics.flag = *flag;
564 memcpy(&priv->statistics.common, common, sizeof(*common));
565 memcpy(&priv->statistics.rx_non_phy, rx_non_phy, sizeof(*rx_non_phy));
566 memcpy(&priv->statistics.rx_ofdm, rx_ofdm, sizeof(*rx_ofdm));
567 memcpy(&priv->statistics.rx_ofdm_ht, rx_ofdm_ht, sizeof(*rx_ofdm_ht));
568 memcpy(&priv->statistics.rx_cck, rx_cck, sizeof(*rx_cck));
569 memcpy(&priv->statistics.tx, tx, sizeof(*tx));
570 #ifdef CONFIG_IWLWIFI_DEBUGFS
571 if (bt_activity)
572 memcpy(&priv->statistics.bt_activity, bt_activity,
573 sizeof(*bt_activity));
574 #endif
575
576 priv->rx_statistics_jiffies = stamp;
577
578 set_bit(STATUS_STATISTICS, &priv->status);
579
580 /* Reschedule the statistics timer to occur in
581 * reg_recalib_period seconds to ensure we get a
582 * thermal update even if the uCode doesn't give
583 * us one */
584 mod_timer(&priv->statistics_periodic, jiffies +
585 msecs_to_jiffies(reg_recalib_period * 1000));
586
587 if (unlikely(!test_bit(STATUS_SCANNING, &priv->status)) &&
588 (pkt->hdr.cmd == STATISTICS_NOTIFICATION)) {
589 iwlagn_rx_calc_noise(priv);
590 queue_work(priv->workqueue, &priv->run_time_calib_work);
591 }
592 if (cfg(priv)->lib->temperature && change)
593 cfg(priv)->lib->temperature(priv);
594
595 spin_unlock(&priv->statistics.lock);
596
597 return 0;
598 }
599
iwlagn_rx_reply_statistics(struct iwl_priv * priv,struct iwl_rx_cmd_buffer * rxb,struct iwl_device_cmd * cmd)600 static int iwlagn_rx_reply_statistics(struct iwl_priv *priv,
601 struct iwl_rx_cmd_buffer *rxb,
602 struct iwl_device_cmd *cmd)
603 {
604 struct iwl_rx_packet *pkt = rxb_addr(rxb);
605 struct iwl_notif_statistics *stats = (void *)pkt->data;
606
607 if (le32_to_cpu(stats->flag) & UCODE_STATISTICS_CLEAR_MSK) {
608 #ifdef CONFIG_IWLWIFI_DEBUGFS
609 memset(&priv->accum_stats, 0,
610 sizeof(priv->accum_stats));
611 memset(&priv->delta_stats, 0,
612 sizeof(priv->delta_stats));
613 memset(&priv->max_delta_stats, 0,
614 sizeof(priv->max_delta_stats));
615 #endif
616 IWL_DEBUG_RX(priv, "Statistics have been cleared\n");
617 }
618 iwlagn_rx_statistics(priv, rxb, cmd);
619 return 0;
620 }
621
622 /* Handle notification from uCode that card's power state is changing
623 * due to software, hardware, or critical temperature RFKILL */
iwlagn_rx_card_state_notif(struct iwl_priv * priv,struct iwl_rx_cmd_buffer * rxb,struct iwl_device_cmd * cmd)624 static int iwlagn_rx_card_state_notif(struct iwl_priv *priv,
625 struct iwl_rx_cmd_buffer *rxb,
626 struct iwl_device_cmd *cmd)
627 {
628 struct iwl_rx_packet *pkt = rxb_addr(rxb);
629 struct iwl_card_state_notif *card_state_notif = (void *)pkt->data;
630 u32 flags = le32_to_cpu(card_state_notif->flags);
631 unsigned long status = priv->status;
632
633 IWL_DEBUG_RF_KILL(priv, "Card state received: HW:%s SW:%s CT:%s\n",
634 (flags & HW_CARD_DISABLED) ? "Kill" : "On",
635 (flags & SW_CARD_DISABLED) ? "Kill" : "On",
636 (flags & CT_CARD_DISABLED) ?
637 "Reached" : "Not reached");
638
639 if (flags & (SW_CARD_DISABLED | HW_CARD_DISABLED |
640 CT_CARD_DISABLED)) {
641
642 iwl_write32(trans(priv), CSR_UCODE_DRV_GP1_SET,
643 CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
644
645 iwl_write_direct32(trans(priv), HBUS_TARG_MBX_C,
646 HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
647
648 if (!(flags & RXON_CARD_DISABLED)) {
649 iwl_write32(trans(priv), CSR_UCODE_DRV_GP1_CLR,
650 CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
651 iwl_write_direct32(trans(priv), HBUS_TARG_MBX_C,
652 HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
653 }
654 if (flags & CT_CARD_DISABLED)
655 iwl_tt_enter_ct_kill(priv);
656 }
657 if (!(flags & CT_CARD_DISABLED))
658 iwl_tt_exit_ct_kill(priv);
659
660 if (flags & HW_CARD_DISABLED)
661 set_bit(STATUS_RF_KILL_HW, &priv->status);
662 else
663 clear_bit(STATUS_RF_KILL_HW, &priv->status);
664
665
666 if (!(flags & RXON_CARD_DISABLED))
667 iwl_scan_cancel(priv);
668
669 if ((test_bit(STATUS_RF_KILL_HW, &status) !=
670 test_bit(STATUS_RF_KILL_HW, &priv->status)))
671 wiphy_rfkill_set_hw_state(priv->hw->wiphy,
672 test_bit(STATUS_RF_KILL_HW, &priv->status));
673 else
674 wake_up(&trans(priv)->wait_command_queue);
675 return 0;
676 }
677
iwlagn_rx_missed_beacon_notif(struct iwl_priv * priv,struct iwl_rx_cmd_buffer * rxb,struct iwl_device_cmd * cmd)678 static int iwlagn_rx_missed_beacon_notif(struct iwl_priv *priv,
679 struct iwl_rx_cmd_buffer *rxb,
680 struct iwl_device_cmd *cmd)
681
682 {
683 struct iwl_rx_packet *pkt = rxb_addr(rxb);
684 struct iwl_missed_beacon_notif *missed_beacon = (void *)pkt->data;
685
686 if (le32_to_cpu(missed_beacon->consecutive_missed_beacons) >
687 priv->missed_beacon_threshold) {
688 IWL_DEBUG_CALIB(priv,
689 "missed bcn cnsq %d totl %d rcd %d expctd %d\n",
690 le32_to_cpu(missed_beacon->consecutive_missed_beacons),
691 le32_to_cpu(missed_beacon->total_missed_becons),
692 le32_to_cpu(missed_beacon->num_recvd_beacons),
693 le32_to_cpu(missed_beacon->num_expected_beacons));
694 if (!test_bit(STATUS_SCANNING, &priv->status))
695 iwl_init_sensitivity(priv);
696 }
697 return 0;
698 }
699
700 /* Cache phy data (Rx signal strength, etc) for HT frame (REPLY_RX_PHY_CMD).
701 * 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,struct iwl_device_cmd * cmd)702 static int iwlagn_rx_reply_rx_phy(struct iwl_priv *priv,
703 struct iwl_rx_cmd_buffer *rxb,
704 struct iwl_device_cmd *cmd)
705 {
706 struct iwl_rx_packet *pkt = rxb_addr(rxb);
707
708 priv->last_phy_res_valid = true;
709 memcpy(&priv->last_phy_res, pkt->data,
710 sizeof(struct iwl_rx_phy_res));
711 return 0;
712 }
713
714 /*
715 * returns non-zero if packet should be dropped
716 */
iwlagn_set_decrypted_flag(struct iwl_priv * priv,struct ieee80211_hdr * hdr,u32 decrypt_res,struct ieee80211_rx_status * stats)717 static int iwlagn_set_decrypted_flag(struct iwl_priv *priv,
718 struct ieee80211_hdr *hdr,
719 u32 decrypt_res,
720 struct ieee80211_rx_status *stats)
721 {
722 u16 fc = le16_to_cpu(hdr->frame_control);
723
724 /*
725 * All contexts have the same setting here due to it being
726 * a module parameter, so OK to check any context.
727 */
728 if (priv->contexts[IWL_RXON_CTX_BSS].active.filter_flags &
729 RXON_FILTER_DIS_DECRYPT_MSK)
730 return 0;
731
732 if (!(fc & IEEE80211_FCTL_PROTECTED))
733 return 0;
734
735 IWL_DEBUG_RX(priv, "decrypt_res:0x%x\n", decrypt_res);
736 switch (decrypt_res & RX_RES_STATUS_SEC_TYPE_MSK) {
737 case RX_RES_STATUS_SEC_TYPE_TKIP:
738 /* The uCode has got a bad phase 1 Key, pushes the packet.
739 * Decryption will be done in SW. */
740 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
741 RX_RES_STATUS_BAD_KEY_TTAK)
742 break;
743
744 case RX_RES_STATUS_SEC_TYPE_WEP:
745 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
746 RX_RES_STATUS_BAD_ICV_MIC) {
747 /* bad ICV, the packet is destroyed since the
748 * decryption is inplace, drop it */
749 IWL_DEBUG_RX(priv, "Packet destroyed\n");
750 return -1;
751 }
752 case RX_RES_STATUS_SEC_TYPE_CCMP:
753 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
754 RX_RES_STATUS_DECRYPT_OK) {
755 IWL_DEBUG_RX(priv, "hw decrypt successfully!!!\n");
756 stats->flag |= RX_FLAG_DECRYPTED;
757 }
758 break;
759
760 default:
761 break;
762 }
763 return 0;
764 }
765
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)766 static void iwlagn_pass_packet_to_mac80211(struct iwl_priv *priv,
767 struct ieee80211_hdr *hdr,
768 u16 len,
769 u32 ampdu_status,
770 struct iwl_rx_cmd_buffer *rxb,
771 struct ieee80211_rx_status *stats)
772 {
773 struct sk_buff *skb;
774 __le16 fc = hdr->frame_control;
775 struct iwl_rxon_context *ctx;
776 unsigned int hdrlen, fraglen;
777
778 /* We only process data packets if the interface is open */
779 if (unlikely(!priv->is_open)) {
780 IWL_DEBUG_DROP_LIMIT(priv,
781 "Dropping packet while interface is not open.\n");
782 return;
783 }
784
785 /* In case of HW accelerated crypto and bad decryption, drop */
786 if (!iwlagn_mod_params.sw_crypto &&
787 iwlagn_set_decrypted_flag(priv, hdr, ampdu_status, stats))
788 return;
789
790 /* Dont use dev_alloc_skb(), we'll have enough headroom once
791 * ieee80211_hdr pulled.
792 */
793 skb = alloc_skb(128, GFP_ATOMIC);
794 if (!skb) {
795 IWL_ERR(priv, "alloc_skb failed\n");
796 return;
797 }
798 hdrlen = min_t(unsigned int, len, skb_tailroom(skb));
799 memcpy(skb_put(skb, hdrlen), hdr, hdrlen);
800 fraglen = len - hdrlen;
801
802 if (fraglen) {
803 int offset = (void *)hdr + hdrlen - rxb_addr(rxb);
804
805 skb_add_rx_frag(skb, 0, rxb_steal_page(rxb), offset,
806 fraglen, rxb->truesize);
807 }
808 iwl_update_stats(priv, false, fc, len);
809
810 /*
811 * Wake any queues that were stopped due to a passive channel tx
812 * failure. This can happen because the regulatory enforcement in
813 * the device waits for a beacon before allowing transmission,
814 * sometimes even after already having transmitted frames for the
815 * association because the new RXON may reset the information.
816 */
817 if (unlikely(ieee80211_is_beacon(fc) && priv->passive_no_rx)) {
818 for_each_context(priv, ctx) {
819 if (compare_ether_addr(hdr->addr3,
820 ctx->active.bssid_addr))
821 continue;
822 iwlagn_lift_passive_no_rx(priv);
823 }
824 }
825
826 memcpy(IEEE80211_SKB_RXCB(skb), stats, sizeof(*stats));
827
828 ieee80211_rx(priv->hw, skb);
829 }
830
iwlagn_translate_rx_status(struct iwl_priv * priv,u32 decrypt_in)831 static u32 iwlagn_translate_rx_status(struct iwl_priv *priv, u32 decrypt_in)
832 {
833 u32 decrypt_out = 0;
834
835 if ((decrypt_in & RX_RES_STATUS_STATION_FOUND) ==
836 RX_RES_STATUS_STATION_FOUND)
837 decrypt_out |= (RX_RES_STATUS_STATION_FOUND |
838 RX_RES_STATUS_NO_STATION_INFO_MISMATCH);
839
840 decrypt_out |= (decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK);
841
842 /* packet was not encrypted */
843 if ((decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) ==
844 RX_RES_STATUS_SEC_TYPE_NONE)
845 return decrypt_out;
846
847 /* packet was encrypted with unknown alg */
848 if ((decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) ==
849 RX_RES_STATUS_SEC_TYPE_ERR)
850 return decrypt_out;
851
852 /* decryption was not done in HW */
853 if ((decrypt_in & RX_MPDU_RES_STATUS_DEC_DONE_MSK) !=
854 RX_MPDU_RES_STATUS_DEC_DONE_MSK)
855 return decrypt_out;
856
857 switch (decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) {
858
859 case RX_RES_STATUS_SEC_TYPE_CCMP:
860 /* alg is CCM: check MIC only */
861 if (!(decrypt_in & RX_MPDU_RES_STATUS_MIC_OK))
862 /* Bad MIC */
863 decrypt_out |= RX_RES_STATUS_BAD_ICV_MIC;
864 else
865 decrypt_out |= RX_RES_STATUS_DECRYPT_OK;
866
867 break;
868
869 case RX_RES_STATUS_SEC_TYPE_TKIP:
870 if (!(decrypt_in & RX_MPDU_RES_STATUS_TTAK_OK)) {
871 /* Bad TTAK */
872 decrypt_out |= RX_RES_STATUS_BAD_KEY_TTAK;
873 break;
874 }
875 /* fall through if TTAK OK */
876 default:
877 if (!(decrypt_in & RX_MPDU_RES_STATUS_ICV_OK))
878 decrypt_out |= RX_RES_STATUS_BAD_ICV_MIC;
879 else
880 decrypt_out |= RX_RES_STATUS_DECRYPT_OK;
881 break;
882 }
883
884 IWL_DEBUG_RX(priv, "decrypt_in:0x%x decrypt_out = 0x%x\n",
885 decrypt_in, decrypt_out);
886
887 return decrypt_out;
888 }
889
890 /* Calc max signal level (dBm) among 3 possible receivers */
iwlagn_calc_rssi(struct iwl_priv * priv,struct iwl_rx_phy_res * rx_resp)891 static int iwlagn_calc_rssi(struct iwl_priv *priv,
892 struct iwl_rx_phy_res *rx_resp)
893 {
894 /* data from PHY/DSP regarding signal strength, etc.,
895 * contents are always there, not configurable by host
896 */
897 struct iwlagn_non_cfg_phy *ncphy =
898 (struct iwlagn_non_cfg_phy *)rx_resp->non_cfg_phy_buf;
899 u32 val, rssi_a, rssi_b, rssi_c, max_rssi;
900 u8 agc;
901
902 val = le32_to_cpu(ncphy->non_cfg_phy[IWLAGN_RX_RES_AGC_IDX]);
903 agc = (val & IWLAGN_OFDM_AGC_MSK) >> IWLAGN_OFDM_AGC_BIT_POS;
904
905 /* Find max rssi among 3 possible receivers.
906 * These values are measured by the digital signal processor (DSP).
907 * They should stay fairly constant even as the signal strength varies,
908 * if the radio's automatic gain control (AGC) is working right.
909 * AGC value (see below) will provide the "interesting" info.
910 */
911 val = le32_to_cpu(ncphy->non_cfg_phy[IWLAGN_RX_RES_RSSI_AB_IDX]);
912 rssi_a = (val & IWLAGN_OFDM_RSSI_INBAND_A_BITMSK) >>
913 IWLAGN_OFDM_RSSI_A_BIT_POS;
914 rssi_b = (val & IWLAGN_OFDM_RSSI_INBAND_B_BITMSK) >>
915 IWLAGN_OFDM_RSSI_B_BIT_POS;
916 val = le32_to_cpu(ncphy->non_cfg_phy[IWLAGN_RX_RES_RSSI_C_IDX]);
917 rssi_c = (val & IWLAGN_OFDM_RSSI_INBAND_C_BITMSK) >>
918 IWLAGN_OFDM_RSSI_C_BIT_POS;
919
920 max_rssi = max_t(u32, rssi_a, rssi_b);
921 max_rssi = max_t(u32, max_rssi, rssi_c);
922
923 IWL_DEBUG_STATS(priv, "Rssi In A %d B %d C %d Max %d AGC dB %d\n",
924 rssi_a, rssi_b, rssi_c, max_rssi, agc);
925
926 /* dBm = max_rssi dB - agc dB - constant.
927 * Higher AGC (higher radio gain) means lower signal. */
928 return max_rssi - agc - IWLAGN_RSSI_OFFSET;
929 }
930
931 /* Called for REPLY_RX (legacy ABG frames), or
932 * REPLY_RX_MPDU_CMD (HT high-throughput N frames). */
iwlagn_rx_reply_rx(struct iwl_priv * priv,struct iwl_rx_cmd_buffer * rxb,struct iwl_device_cmd * cmd)933 static int iwlagn_rx_reply_rx(struct iwl_priv *priv,
934 struct iwl_rx_cmd_buffer *rxb,
935 struct iwl_device_cmd *cmd)
936 {
937 struct ieee80211_hdr *header;
938 struct ieee80211_rx_status rx_status;
939 struct iwl_rx_packet *pkt = rxb_addr(rxb);
940 struct iwl_rx_phy_res *phy_res;
941 __le32 rx_pkt_status;
942 struct iwl_rx_mpdu_res_start *amsdu;
943 u32 len;
944 u32 ampdu_status;
945 u32 rate_n_flags;
946
947 /**
948 * REPLY_RX and REPLY_RX_MPDU_CMD are handled differently.
949 * REPLY_RX: physical layer info is in this buffer
950 * REPLY_RX_MPDU_CMD: physical layer info was sent in separate
951 * command and cached in priv->last_phy_res
952 *
953 * Here we set up local variables depending on which command is
954 * received.
955 */
956 if (pkt->hdr.cmd == REPLY_RX) {
957 phy_res = (struct iwl_rx_phy_res *)pkt->data;
958 header = (struct ieee80211_hdr *)(pkt->data + sizeof(*phy_res)
959 + phy_res->cfg_phy_cnt);
960
961 len = le16_to_cpu(phy_res->byte_count);
962 rx_pkt_status = *(__le32 *)(pkt->data + sizeof(*phy_res) +
963 phy_res->cfg_phy_cnt + len);
964 ampdu_status = le32_to_cpu(rx_pkt_status);
965 } else {
966 if (!priv->last_phy_res_valid) {
967 IWL_ERR(priv, "MPDU frame without cached PHY data\n");
968 return 0;
969 }
970 phy_res = &priv->last_phy_res;
971 amsdu = (struct iwl_rx_mpdu_res_start *)pkt->data;
972 header = (struct ieee80211_hdr *)(pkt->data + sizeof(*amsdu));
973 len = le16_to_cpu(amsdu->byte_count);
974 rx_pkt_status = *(__le32 *)(pkt->data + sizeof(*amsdu) + len);
975 ampdu_status = iwlagn_translate_rx_status(priv,
976 le32_to_cpu(rx_pkt_status));
977 }
978
979 if ((unlikely(phy_res->cfg_phy_cnt > 20))) {
980 IWL_DEBUG_DROP(priv, "dsp size out of range [0,20]: %d/n",
981 phy_res->cfg_phy_cnt);
982 return 0;
983 }
984
985 if (!(rx_pkt_status & RX_RES_STATUS_NO_CRC32_ERROR) ||
986 !(rx_pkt_status & RX_RES_STATUS_NO_RXE_OVERFLOW)) {
987 IWL_DEBUG_RX(priv, "Bad CRC or FIFO: 0x%08X.\n",
988 le32_to_cpu(rx_pkt_status));
989 return 0;
990 }
991
992 /* This will be used in several places later */
993 rate_n_flags = le32_to_cpu(phy_res->rate_n_flags);
994
995 /* rx_status carries information about the packet to mac80211 */
996 rx_status.mactime = le64_to_cpu(phy_res->timestamp);
997 rx_status.band = (phy_res->phy_flags & RX_RES_PHY_FLAGS_BAND_24_MSK) ?
998 IEEE80211_BAND_2GHZ : IEEE80211_BAND_5GHZ;
999 rx_status.freq =
1000 ieee80211_channel_to_frequency(le16_to_cpu(phy_res->channel),
1001 rx_status.band);
1002 rx_status.rate_idx =
1003 iwlagn_hwrate_to_mac80211_idx(rate_n_flags, rx_status.band);
1004 rx_status.flag = 0;
1005
1006 /* TSF isn't reliable. In order to allow smooth user experience,
1007 * this W/A doesn't propagate it to the mac80211 */
1008 /*rx_status.flag |= RX_FLAG_MACTIME_MPDU;*/
1009
1010 priv->ucode_beacon_time = le32_to_cpu(phy_res->beacon_time_stamp);
1011
1012 /* Find max signal strength (dBm) among 3 antenna/receiver chains */
1013 rx_status.signal = iwlagn_calc_rssi(priv, phy_res);
1014
1015 iwl_dbg_log_rx_data_frame(priv, len, header);
1016 IWL_DEBUG_STATS_LIMIT(priv, "Rssi %d, TSF %llu\n",
1017 rx_status.signal, (unsigned long long)rx_status.mactime);
1018
1019 /*
1020 * "antenna number"
1021 *
1022 * It seems that the antenna field in the phy flags value
1023 * is actually a bit field. This is undefined by radiotap,
1024 * it wants an actual antenna number but I always get "7"
1025 * for most legacy frames I receive indicating that the
1026 * same frame was received on all three RX chains.
1027 *
1028 * I think this field should be removed in favor of a
1029 * new 802.11n radiotap field "RX chains" that is defined
1030 * as a bitmask.
1031 */
1032 rx_status.antenna =
1033 (le16_to_cpu(phy_res->phy_flags) & RX_RES_PHY_FLAGS_ANTENNA_MSK)
1034 >> RX_RES_PHY_FLAGS_ANTENNA_POS;
1035
1036 /* set the preamble flag if appropriate */
1037 if (phy_res->phy_flags & RX_RES_PHY_FLAGS_SHORT_PREAMBLE_MSK)
1038 rx_status.flag |= RX_FLAG_SHORTPRE;
1039
1040 /* Set up the HT phy flags */
1041 if (rate_n_flags & RATE_MCS_HT_MSK)
1042 rx_status.flag |= RX_FLAG_HT;
1043 if (rate_n_flags & RATE_MCS_HT40_MSK)
1044 rx_status.flag |= RX_FLAG_40MHZ;
1045 if (rate_n_flags & RATE_MCS_SGI_MSK)
1046 rx_status.flag |= RX_FLAG_SHORT_GI;
1047
1048 iwlagn_pass_packet_to_mac80211(priv, header, len, ampdu_status,
1049 rxb, &rx_status);
1050 return 0;
1051 }
1052
iwlagn_rx_noa_notification(struct iwl_priv * priv,struct iwl_rx_cmd_buffer * rxb,struct iwl_device_cmd * cmd)1053 static int iwlagn_rx_noa_notification(struct iwl_priv *priv,
1054 struct iwl_rx_cmd_buffer *rxb,
1055 struct iwl_device_cmd *cmd)
1056 {
1057 struct iwl_wipan_noa_data *new_data, *old_data;
1058 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1059 struct iwl_wipan_noa_notification *noa_notif = (void *)pkt->data;
1060
1061 /* no condition -- we're in softirq */
1062 old_data = rcu_dereference_protected(priv->noa_data, true);
1063
1064 if (noa_notif->noa_active) {
1065 u32 len = le16_to_cpu(noa_notif->noa_attribute.length);
1066 u32 copylen = len;
1067
1068 /* EID, len, OUI, subtype */
1069 len += 1 + 1 + 3 + 1;
1070 /* P2P id, P2P length */
1071 len += 1 + 2;
1072 copylen += 1 + 2;
1073
1074 new_data = kmalloc(sizeof(*new_data) + len, GFP_ATOMIC);
1075 if (new_data) {
1076 new_data->length = len;
1077 new_data->data[0] = WLAN_EID_VENDOR_SPECIFIC;
1078 new_data->data[1] = len - 2; /* not counting EID, len */
1079 new_data->data[2] = (WLAN_OUI_WFA >> 16) & 0xff;
1080 new_data->data[3] = (WLAN_OUI_WFA >> 8) & 0xff;
1081 new_data->data[4] = (WLAN_OUI_WFA >> 0) & 0xff;
1082 new_data->data[5] = WLAN_OUI_TYPE_WFA_P2P;
1083 memcpy(&new_data->data[6], &noa_notif->noa_attribute,
1084 copylen);
1085 }
1086 } else
1087 new_data = NULL;
1088
1089 rcu_assign_pointer(priv->noa_data, new_data);
1090
1091 if (old_data)
1092 kfree_rcu(old_data, rcu_head);
1093
1094 return 0;
1095 }
1096
1097 /**
1098 * iwl_setup_rx_handlers - Initialize Rx handler callbacks
1099 *
1100 * Setup the RX handlers for each of the reply types sent from the uCode
1101 * to the host.
1102 */
iwl_setup_rx_handlers(struct iwl_priv * priv)1103 void iwl_setup_rx_handlers(struct iwl_priv *priv)
1104 {
1105 int (**handlers)(struct iwl_priv *priv, struct iwl_rx_cmd_buffer *rxb,
1106 struct iwl_device_cmd *cmd);
1107
1108 handlers = priv->rx_handlers;
1109
1110 handlers[REPLY_ERROR] = iwlagn_rx_reply_error;
1111 handlers[CHANNEL_SWITCH_NOTIFICATION] = iwlagn_rx_csa;
1112 handlers[SPECTRUM_MEASURE_NOTIFICATION] =
1113 iwlagn_rx_spectrum_measure_notif;
1114 handlers[PM_SLEEP_NOTIFICATION] = iwlagn_rx_pm_sleep_notif;
1115 handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
1116 iwlagn_rx_pm_debug_statistics_notif;
1117 handlers[BEACON_NOTIFICATION] = iwlagn_rx_beacon_notif;
1118 handlers[REPLY_ADD_STA] = iwl_add_sta_callback;
1119
1120 handlers[REPLY_WIPAN_NOA_NOTIFICATION] = iwlagn_rx_noa_notification;
1121
1122 /*
1123 * The same handler is used for both the REPLY to a discrete
1124 * statistics request from the host as well as for the periodic
1125 * statistics notifications (after received beacons) from the uCode.
1126 */
1127 handlers[REPLY_STATISTICS_CMD] = iwlagn_rx_reply_statistics;
1128 handlers[STATISTICS_NOTIFICATION] = iwlagn_rx_statistics;
1129
1130 iwl_setup_rx_scan_handlers(priv);
1131
1132 handlers[CARD_STATE_NOTIFICATION] = iwlagn_rx_card_state_notif;
1133 handlers[MISSED_BEACONS_NOTIFICATION] =
1134 iwlagn_rx_missed_beacon_notif;
1135
1136 /* Rx handlers */
1137 handlers[REPLY_RX_PHY_CMD] = iwlagn_rx_reply_rx_phy;
1138 handlers[REPLY_RX_MPDU_CMD] = iwlagn_rx_reply_rx;
1139
1140 /* block ack */
1141 handlers[REPLY_COMPRESSED_BA] =
1142 iwlagn_rx_reply_compressed_ba;
1143
1144 /* init calibration handlers */
1145 priv->rx_handlers[CALIBRATION_RES_NOTIFICATION] =
1146 iwlagn_rx_calib_result;
1147 priv->rx_handlers[REPLY_TX] = iwlagn_rx_reply_tx;
1148
1149 /* set up notification wait support */
1150 iwl_notification_wait_init(&priv->notif_wait);
1151
1152 /* Set up BT Rx handlers */
1153 if (cfg(priv)->bt_params)
1154 iwlagn_bt_rx_handler_setup(priv);
1155 }
1156
iwl_rx_dispatch(struct iwl_op_mode * op_mode,struct iwl_rx_cmd_buffer * rxb,struct iwl_device_cmd * cmd)1157 int iwl_rx_dispatch(struct iwl_op_mode *op_mode, struct iwl_rx_cmd_buffer *rxb,
1158 struct iwl_device_cmd *cmd)
1159 {
1160 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1161 struct iwl_priv *priv = IWL_OP_MODE_GET_DVM(op_mode);
1162 void (*pre_rx_handler)(struct iwl_priv *,
1163 struct iwl_rx_cmd_buffer *);
1164 int err = 0;
1165
1166 /*
1167 * Do the notification wait before RX handlers so
1168 * even if the RX handler consumes the RXB we have
1169 * access to it in the notification wait entry.
1170 */
1171 iwl_notification_wait_notify(&priv->notif_wait, pkt);
1172
1173 /* RX data may be forwarded to userspace (using pre_rx_handler) in one
1174 * of two cases: the first, that the user owns the uCode through
1175 * testmode - in such case the pre_rx_handler is set and no further
1176 * processing takes place. The other case is when the user want to
1177 * monitor the rx w/o affecting the regular flow - the pre_rx_handler
1178 * will be set but the ownership flag != IWL_OWNERSHIP_TM and the flow
1179 * continues.
1180 * We need to use ACCESS_ONCE to prevent a case where the handler
1181 * changes between the check and the call.
1182 */
1183 pre_rx_handler = ACCESS_ONCE(priv->pre_rx_handler);
1184 if (pre_rx_handler)
1185 pre_rx_handler(priv, rxb);
1186 if (priv->ucode_owner != IWL_OWNERSHIP_TM) {
1187 /* Based on type of command response or notification,
1188 * handle those that need handling via function in
1189 * rx_handlers table. See iwl_setup_rx_handlers() */
1190 if (priv->rx_handlers[pkt->hdr.cmd]) {
1191 priv->rx_handlers_stats[pkt->hdr.cmd]++;
1192 err = priv->rx_handlers[pkt->hdr.cmd] (priv, rxb, cmd);
1193 } else {
1194 /* No handling needed */
1195 IWL_DEBUG_RX(priv,
1196 "No handler needed for %s, 0x%02x\n",
1197 get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
1198 }
1199 }
1200 return err;
1201 }
1202