?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
fix a kmap leak in virtio_console
[linux/fpc-iii.git] / drivers / net / wireless / iwlwifi / dvm / rx.c
blob7a1bc1c547e17ea3e35c47b1070c174c9268c9d6
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 *iwl_dvm_cmd_strings[REPLY_MAX] = {
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
126 static int iwlagn_rx_reply_error(struct iwl_priv *priv,
127 struct iwl_rx_cmd_buffer *rxb,
128 struct iwl_device_cmd *cmd)
129 {
130 struct iwl_rx_packet *pkt = rxb_addr(rxb);
131 struct iwl_error_resp *err_resp = (void *)pkt->data;
132
133 IWL_ERR(priv, "Error Reply type 0x%08X cmd REPLY_ERROR (0x%02X) "
134 "seq 0x%04X ser 0x%08X\n",
135 le32_to_cpu(err_resp->error_type),
136 err_resp->cmd_id,
137 le16_to_cpu(err_resp->bad_cmd_seq_num),
138 le32_to_cpu(err_resp->error_info));
139 return 0;
140 }
141
142 static int iwlagn_rx_csa(struct iwl_priv *priv, struct iwl_rx_cmd_buffer *rxb,
143 struct iwl_device_cmd *cmd)
144 {
145 struct iwl_rx_packet *pkt = rxb_addr(rxb);
146 struct iwl_csa_notification *csa = (void *)pkt->data;
147 /*
148 * MULTI-FIXME
149 * See iwlagn_mac_channel_switch.
150 */
151 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
152 struct iwl_rxon_cmd *rxon = (void *)&ctx->active;
153
154 if (!test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status))
155 return 0;
156
157 if (!le32_to_cpu(csa->status) && csa->channel == priv->switch_channel) {
158 rxon->channel = csa->channel;
159 ctx->staging.channel = csa->channel;
160 IWL_DEBUG_11H(priv, "CSA notif: channel %d\n",
161 le16_to_cpu(csa->channel));
162 iwl_chswitch_done(priv, true);
163 } else {
164 IWL_ERR(priv, "CSA notif (fail) : channel %d\n",
165 le16_to_cpu(csa->channel));
166 iwl_chswitch_done(priv, false);
167 }
168 return 0;
169 }
170
171
172 static int iwlagn_rx_spectrum_measure_notif(struct iwl_priv *priv,
173 struct iwl_rx_cmd_buffer *rxb,
174 struct iwl_device_cmd *cmd)
175 {
176 struct iwl_rx_packet *pkt = rxb_addr(rxb);
177 struct iwl_spectrum_notification *report = (void *)pkt->data;
178
179 if (!report->state) {
180 IWL_DEBUG_11H(priv,
181 "Spectrum Measure Notification: Start\n");
182 return 0;
183 }
184
185 memcpy(&priv->measure_report, report, sizeof(*report));
186 priv->measurement_status |= MEASUREMENT_READY;
187 return 0;
188 }
189
190 static int iwlagn_rx_pm_sleep_notif(struct iwl_priv *priv,
191 struct iwl_rx_cmd_buffer *rxb,
192 struct iwl_device_cmd *cmd)
193 {
194 #ifdef CONFIG_IWLWIFI_DEBUG
195 struct iwl_rx_packet *pkt = rxb_addr(rxb);
196 struct iwl_sleep_notification *sleep = (void *)pkt->data;
197 IWL_DEBUG_RX(priv, "sleep mode: %d, src: %d\n",
198 sleep->pm_sleep_mode, sleep->pm_wakeup_src);
199 #endif
200 return 0;
201 }
202
203 static int iwlagn_rx_pm_debug_statistics_notif(struct iwl_priv *priv,
204 struct iwl_rx_cmd_buffer *rxb,
205 struct iwl_device_cmd *cmd)
206 {
207 struct iwl_rx_packet *pkt = rxb_addr(rxb);
208 u32 __maybe_unused len = iwl_rx_packet_len(pkt);
209 IWL_DEBUG_RADIO(priv, "Dumping %d bytes of unhandled "
210 "notification for PM_DEBUG_STATISTIC_NOTIFIC:\n", len);
211 iwl_print_hex_dump(priv, IWL_DL_RADIO, pkt->data, len);
212 return 0;
213 }
214
215 static int iwlagn_rx_beacon_notif(struct iwl_priv *priv,
216 struct iwl_rx_cmd_buffer *rxb,
217 struct iwl_device_cmd *cmd)
218 {
219 struct iwl_rx_packet *pkt = rxb_addr(rxb);
220 struct iwlagn_beacon_notif *beacon = (void *)pkt->data;
221 #ifdef CONFIG_IWLWIFI_DEBUG
222 u16 status = le16_to_cpu(beacon->beacon_notify_hdr.status.status);
223 u8 rate = iwl_hw_get_rate(beacon->beacon_notify_hdr.rate_n_flags);
224
225 IWL_DEBUG_RX(priv, "beacon status %#x, retries:%d ibssmgr:%d "
226 "tsf:0x%.8x%.8x rate:%d\n",
227 status & TX_STATUS_MSK,
228 beacon->beacon_notify_hdr.failure_frame,
229 le32_to_cpu(beacon->ibss_mgr_status),
230 le32_to_cpu(beacon->high_tsf),
231 le32_to_cpu(beacon->low_tsf), rate);
232 #endif
233
234 priv->ibss_manager = le32_to_cpu(beacon->ibss_mgr_status);
235
236 return 0;
237 }
238
239 /**
240 * iwl_good_plcp_health - checks for plcp error.
241 *
242 * When the plcp error is exceeding the thresholds, reset the radio
243 * to improve the throughput.
244 */
245 static bool iwlagn_good_plcp_health(struct iwl_priv *priv,
246 struct statistics_rx_phy *cur_ofdm,
247 struct statistics_rx_ht_phy *cur_ofdm_ht,
248 unsigned int msecs)
249 {
250 int delta;
251 int threshold = priv->plcp_delta_threshold;
252
253 if (threshold == IWL_MAX_PLCP_ERR_THRESHOLD_DISABLE) {
254 IWL_DEBUG_RADIO(priv, "plcp_err check disabled\n");
255 return true;
256 }
257
258 delta = le32_to_cpu(cur_ofdm->plcp_err) -
259 le32_to_cpu(priv->statistics.rx_ofdm.plcp_err) +
260 le32_to_cpu(cur_ofdm_ht->plcp_err) -
261 le32_to_cpu(priv->statistics.rx_ofdm_ht.plcp_err);
262
263 /* Can be negative if firmware reset statistics */
264 if (delta <= 0)
265 return true;
266
267 if ((delta * 100 / msecs) > threshold) {
268 IWL_DEBUG_RADIO(priv,
269 "plcp health threshold %u delta %d msecs %u\n",
270 threshold, delta, msecs);
271 return false;
272 }
273
274 return true;
275 }
276
277 int iwl_force_rf_reset(struct iwl_priv *priv, bool external)
278 {
279 struct iwl_rf_reset *rf_reset;
280
281 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
282 return -EAGAIN;
283
284 if (!iwl_is_any_associated(priv)) {
285 IWL_DEBUG_SCAN(priv, "force reset rejected: not associated\n");
286 return -ENOLINK;
287 }
288
289 rf_reset = &priv->rf_reset;
290 rf_reset->reset_request_count++;
291 if (!external && rf_reset->last_reset_jiffies &&
292 time_after(rf_reset->last_reset_jiffies +
293 IWL_DELAY_NEXT_FORCE_RF_RESET, jiffies)) {
294 IWL_DEBUG_INFO(priv, "RF reset rejected\n");
295 rf_reset->reset_reject_count++;
296 return -EAGAIN;
297 }
298 rf_reset->reset_success_count++;
299 rf_reset->last_reset_jiffies = jiffies;
300
301 /*
302 * There is no easy and better way to force reset the radio,
303 * the only known method is switching channel which will force to
304 * reset and tune the radio.
305 * Use internal short scan (single channel) operation to should
306 * achieve this objective.
307 * Driver should reset the radio when number of consecutive missed
308 * beacon, or any other uCode error condition detected.
309 */
310 IWL_DEBUG_INFO(priv, "perform radio reset.\n");
311 iwl_internal_short_hw_scan(priv);
312 return 0;
313 }
314
315
316 static void iwlagn_recover_from_statistics(struct iwl_priv *priv,
317 struct statistics_rx_phy *cur_ofdm,
318 struct statistics_rx_ht_phy *cur_ofdm_ht,
319 struct statistics_tx *tx,
320 unsigned long stamp)
321 {
322 unsigned int msecs;
323
324 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
325 return;
326
327 msecs = jiffies_to_msecs(stamp - priv->rx_statistics_jiffies);
328
329 /* Only gather statistics and update time stamp when not associated */
330 if (!iwl_is_any_associated(priv))
331 return;
332
333 /* Do not check/recover when do not have enough statistics data */
334 if (msecs < 99)
335 return;
336
337 if (!iwlagn_good_plcp_health(priv, cur_ofdm, cur_ofdm_ht, msecs))
338 iwl_force_rf_reset(priv, false);
339 }
340
341 /* Calculate noise level, based on measurements during network silence just
342 * before arriving beacon. This measurement can be done only if we know
343 * exactly when to expect beacons, therefore only when we're associated. */
344 static void iwlagn_rx_calc_noise(struct iwl_priv *priv)
345 {
346 struct statistics_rx_non_phy *rx_info;
347 int num_active_rx = 0;
348 int total_silence = 0;
349 int bcn_silence_a, bcn_silence_b, bcn_silence_c;
350 int last_rx_noise;
351
352 rx_info = &priv->statistics.rx_non_phy;
353
354 bcn_silence_a =
355 le32_to_cpu(rx_info->beacon_silence_rssi_a) & IN_BAND_FILTER;
356 bcn_silence_b =
357 le32_to_cpu(rx_info->beacon_silence_rssi_b) & IN_BAND_FILTER;
358 bcn_silence_c =
359 le32_to_cpu(rx_info->beacon_silence_rssi_c) & IN_BAND_FILTER;
360
361 if (bcn_silence_a) {
362 total_silence += bcn_silence_a;
363 num_active_rx++;
364 }
365 if (bcn_silence_b) {
366 total_silence += bcn_silence_b;
367 num_active_rx++;
368 }
369 if (bcn_silence_c) {
370 total_silence += bcn_silence_c;
371 num_active_rx++;
372 }
373
374 /* Average among active antennas */
375 if (num_active_rx)
376 last_rx_noise = (total_silence / num_active_rx) - 107;
377 else
378 last_rx_noise = IWL_NOISE_MEAS_NOT_AVAILABLE;
379
380 IWL_DEBUG_CALIB(priv, "inband silence a %u, b %u, c %u, dBm %d\n",
381 bcn_silence_a, bcn_silence_b, bcn_silence_c,
382 last_rx_noise);
383 }
384
385 #ifdef CONFIG_IWLWIFI_DEBUGFS
386 /*
387 * based on the assumption of all statistics counter are in DWORD
388 * FIXME: This function is for debugging, do not deal with
389 * the case of counters roll-over.
390 */
391 static void accum_stats(__le32 *prev, __le32 *cur, __le32 *delta,
392 __le32 *max_delta, __le32 *accum, int size)
393 {
394 int i;
395
396 for (i = 0;
397 i < size / sizeof(__le32);
398 i++, prev++, cur++, delta++, max_delta++, accum++) {
399 if (le32_to_cpu(*cur) > le32_to_cpu(*prev)) {
400 *delta = cpu_to_le32(
401 le32_to_cpu(*cur) - le32_to_cpu(*prev));
402 le32_add_cpu(accum, le32_to_cpu(*delta));
403 if (le32_to_cpu(*delta) > le32_to_cpu(*max_delta))
404 *max_delta = *delta;
405 }
406 }
407 }
408
409 static void
410 iwlagn_accumulative_statistics(struct iwl_priv *priv,
411 struct statistics_general_common *common,
412 struct statistics_rx_non_phy *rx_non_phy,
413 struct statistics_rx_phy *rx_ofdm,
414 struct statistics_rx_ht_phy *rx_ofdm_ht,
415 struct statistics_rx_phy *rx_cck,
416 struct statistics_tx *tx,
417 struct statistics_bt_activity *bt_activity)
418 {
419 #define ACCUM(_name) \
420 accum_stats((__le32 *)&priv->statistics._name, \
421 (__le32 *)_name, \
422 (__le32 *)&priv->delta_stats._name, \
423 (__le32 *)&priv->max_delta_stats._name, \
424 (__le32 *)&priv->accum_stats._name, \
425 sizeof(*_name));
426
427 ACCUM(common);
428 ACCUM(rx_non_phy);
429 ACCUM(rx_ofdm);
430 ACCUM(rx_ofdm_ht);
431 ACCUM(rx_cck);
432 ACCUM(tx);
433 if (bt_activity)
434 ACCUM(bt_activity);
435 #undef ACCUM
436 }
437 #else
438 static inline void
439 iwlagn_accumulative_statistics(struct iwl_priv *priv,
440 struct statistics_general_common *common,
441 struct statistics_rx_non_phy *rx_non_phy,
442 struct statistics_rx_phy *rx_ofdm,
443 struct statistics_rx_ht_phy *rx_ofdm_ht,
444 struct statistics_rx_phy *rx_cck,
445 struct statistics_tx *tx,
446 struct statistics_bt_activity *bt_activity)
447 {
448 }
449 #endif
450
451 static int iwlagn_rx_statistics(struct iwl_priv *priv,
452 struct iwl_rx_cmd_buffer *rxb,
453 struct iwl_device_cmd *cmd)
454 {
455 unsigned long stamp = jiffies;
456 const int reg_recalib_period = 60;
457 int change;
458 struct iwl_rx_packet *pkt = rxb_addr(rxb);
459 u32 len = iwl_rx_packet_payload_len(pkt);
460 __le32 *flag;
461 struct statistics_general_common *common;
462 struct statistics_rx_non_phy *rx_non_phy;
463 struct statistics_rx_phy *rx_ofdm;
464 struct statistics_rx_ht_phy *rx_ofdm_ht;
465 struct statistics_rx_phy *rx_cck;
466 struct statistics_tx *tx;
467 struct statistics_bt_activity *bt_activity;
468
469 IWL_DEBUG_RX(priv, "Statistics notification received (%d bytes).\n",
470 len);
471
472 spin_lock(&priv->statistics.lock);
473
474 if (len == sizeof(struct iwl_bt_notif_statistics)) {
475 struct iwl_bt_notif_statistics *stats;
476 stats = (void *)&pkt->data;
477 flag = &stats->flag;
478 common = &stats->general.common;
479 rx_non_phy = &stats->rx.general.common;
480 rx_ofdm = &stats->rx.ofdm;
481 rx_ofdm_ht = &stats->rx.ofdm_ht;
482 rx_cck = &stats->rx.cck;
483 tx = &stats->tx;
484 bt_activity = &stats->general.activity;
485
486 #ifdef CONFIG_IWLWIFI_DEBUGFS
487 /* handle this exception directly */
488 priv->statistics.num_bt_kills = stats->rx.general.num_bt_kills;
489 le32_add_cpu(&priv->statistics.accum_num_bt_kills,
490 le32_to_cpu(stats->rx.general.num_bt_kills));
491 #endif
492 } else if (len == sizeof(struct iwl_notif_statistics)) {
493 struct iwl_notif_statistics *stats;
494 stats = (void *)&pkt->data;
495 flag = &stats->flag;
496 common = &stats->general.common;
497 rx_non_phy = &stats->rx.general;
498 rx_ofdm = &stats->rx.ofdm;
499 rx_ofdm_ht = &stats->rx.ofdm_ht;
500 rx_cck = &stats->rx.cck;
501 tx = &stats->tx;
502 bt_activity = NULL;
503 } else {
504 WARN_ONCE(1, "len %d doesn't match BT (%zu) or normal (%zu)\n",
505 len, sizeof(struct iwl_bt_notif_statistics),
506 sizeof(struct iwl_notif_statistics));
507 spin_unlock(&priv->statistics.lock);
508 return 0;
509 }
510
511 change = common->temperature != priv->statistics.common.temperature ||
512 (*flag & STATISTICS_REPLY_FLG_HT40_MODE_MSK) !=
513 (priv->statistics.flag & STATISTICS_REPLY_FLG_HT40_MODE_MSK);
514
515 iwlagn_accumulative_statistics(priv, common, rx_non_phy, rx_ofdm,
516 rx_ofdm_ht, rx_cck, tx, bt_activity);
517
518 iwlagn_recover_from_statistics(priv, rx_ofdm, rx_ofdm_ht, tx, stamp);
519
520 priv->statistics.flag = *flag;
521 memcpy(&priv->statistics.common, common, sizeof(*common));
522 memcpy(&priv->statistics.rx_non_phy, rx_non_phy, sizeof(*rx_non_phy));
523 memcpy(&priv->statistics.rx_ofdm, rx_ofdm, sizeof(*rx_ofdm));
524 memcpy(&priv->statistics.rx_ofdm_ht, rx_ofdm_ht, sizeof(*rx_ofdm_ht));
525 memcpy(&priv->statistics.rx_cck, rx_cck, sizeof(*rx_cck));
526 memcpy(&priv->statistics.tx, tx, sizeof(*tx));
527 #ifdef CONFIG_IWLWIFI_DEBUGFS
528 if (bt_activity)
529 memcpy(&priv->statistics.bt_activity, bt_activity,
530 sizeof(*bt_activity));
531 #endif
532
533 priv->rx_statistics_jiffies = stamp;
534
535 set_bit(STATUS_STATISTICS, &priv->status);
536
537 /* Reschedule the statistics timer to occur in
538 * reg_recalib_period seconds to ensure we get a
539 * thermal update even if the uCode doesn't give
540 * us one */
541 mod_timer(&priv->statistics_periodic, jiffies +
542 msecs_to_jiffies(reg_recalib_period * 1000));
543
544 if (unlikely(!test_bit(STATUS_SCANNING, &priv->status)) &&
545 (pkt->hdr.cmd == STATISTICS_NOTIFICATION)) {
546 iwlagn_rx_calc_noise(priv);
547 queue_work(priv->workqueue, &priv->run_time_calib_work);
548 }
549 if (priv->lib->temperature && change)
550 priv->lib->temperature(priv);
551
552 spin_unlock(&priv->statistics.lock);
553
554 return 0;
555 }
556
557 static int iwlagn_rx_reply_statistics(struct iwl_priv *priv,
558 struct iwl_rx_cmd_buffer *rxb,
559 struct iwl_device_cmd *cmd)
560 {
561 struct iwl_rx_packet *pkt = rxb_addr(rxb);
562 struct iwl_notif_statistics *stats = (void *)pkt->data;
563
564 if (le32_to_cpu(stats->flag) & UCODE_STATISTICS_CLEAR_MSK) {
565 #ifdef CONFIG_IWLWIFI_DEBUGFS
566 memset(&priv->accum_stats, 0,
567 sizeof(priv->accum_stats));
568 memset(&priv->delta_stats, 0,
569 sizeof(priv->delta_stats));
570 memset(&priv->max_delta_stats, 0,
571 sizeof(priv->max_delta_stats));
572 #endif
573 IWL_DEBUG_RX(priv, "Statistics have been cleared\n");
574 }
575 iwlagn_rx_statistics(priv, rxb, cmd);
576 return 0;
577 }
578
579 /* Handle notification from uCode that card's power state is changing
580 * due to software, hardware, or critical temperature RFKILL */
581 static int iwlagn_rx_card_state_notif(struct iwl_priv *priv,
582 struct iwl_rx_cmd_buffer *rxb,
583 struct iwl_device_cmd *cmd)
584 {
585 struct iwl_rx_packet *pkt = rxb_addr(rxb);
586 struct iwl_card_state_notif *card_state_notif = (void *)pkt->data;
587 u32 flags = le32_to_cpu(card_state_notif->flags);
588 unsigned long status = priv->status;
589
590 IWL_DEBUG_RF_KILL(priv, "Card state received: HW:%s SW:%s CT:%s\n",
591 (flags & HW_CARD_DISABLED) ? "Kill" : "On",
592 (flags & SW_CARD_DISABLED) ? "Kill" : "On",
593 (flags & CT_CARD_DISABLED) ?
594 "Reached" : "Not reached");
595
596 if (flags & (SW_CARD_DISABLED | HW_CARD_DISABLED |
597 CT_CARD_DISABLED)) {
598
599 iwl_write32(priv->trans, CSR_UCODE_DRV_GP1_SET,
600 CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
601
602 iwl_write_direct32(priv->trans, HBUS_TARG_MBX_C,
603 HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
604
605 if (!(flags & RXON_CARD_DISABLED)) {
606 iwl_write32(priv->trans, CSR_UCODE_DRV_GP1_CLR,
607 CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
608 iwl_write_direct32(priv->trans, HBUS_TARG_MBX_C,
609 HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
610 }
611 if (flags & CT_CARD_DISABLED)
612 iwl_tt_enter_ct_kill(priv);
613 }
614 if (!(flags & CT_CARD_DISABLED))
615 iwl_tt_exit_ct_kill(priv);
616
617 if (flags & HW_CARD_DISABLED)
618 set_bit(STATUS_RF_KILL_HW, &priv->status);
619 else
620 clear_bit(STATUS_RF_KILL_HW, &priv->status);
621
622
623 if (!(flags & RXON_CARD_DISABLED))
624 iwl_scan_cancel(priv);
625
626 if ((test_bit(STATUS_RF_KILL_HW, &status) !=
627 test_bit(STATUS_RF_KILL_HW, &priv->status)))
628 wiphy_rfkill_set_hw_state(priv->hw->wiphy,
629 test_bit(STATUS_RF_KILL_HW, &priv->status));
630 return 0;
631 }
632
633 static int iwlagn_rx_missed_beacon_notif(struct iwl_priv *priv,
634 struct iwl_rx_cmd_buffer *rxb,
635 struct iwl_device_cmd *cmd)
636
637 {
638 struct iwl_rx_packet *pkt = rxb_addr(rxb);
639 struct iwl_missed_beacon_notif *missed_beacon = (void *)pkt->data;
640
641 if (le32_to_cpu(missed_beacon->consecutive_missed_beacons) >
642 priv->missed_beacon_threshold) {
643 IWL_DEBUG_CALIB(priv,
644 "missed bcn cnsq %d totl %d rcd %d expctd %d\n",
645 le32_to_cpu(missed_beacon->consecutive_missed_beacons),
646 le32_to_cpu(missed_beacon->total_missed_becons),
647 le32_to_cpu(missed_beacon->num_recvd_beacons),
648 le32_to_cpu(missed_beacon->num_expected_beacons));
649 if (!test_bit(STATUS_SCANNING, &priv->status))
650 iwl_init_sensitivity(priv);
651 }
652 return 0;
653 }
654
655 /* Cache phy data (Rx signal strength, etc) for HT frame (REPLY_RX_PHY_CMD).
656 * This will be used later in iwl_rx_reply_rx() for REPLY_RX_MPDU_CMD. */
657 static int iwlagn_rx_reply_rx_phy(struct iwl_priv *priv,
658 struct iwl_rx_cmd_buffer *rxb,
659 struct iwl_device_cmd *cmd)
660 {
661 struct iwl_rx_packet *pkt = rxb_addr(rxb);
662
663 priv->last_phy_res_valid = true;
664 priv->ampdu_ref++;
665 memcpy(&priv->last_phy_res, pkt->data,
666 sizeof(struct iwl_rx_phy_res));
667 return 0;
668 }
669
670 /*
671 * returns non-zero if packet should be dropped
672 */
673 static int iwlagn_set_decrypted_flag(struct iwl_priv *priv,
674 struct ieee80211_hdr *hdr,
675 u32 decrypt_res,
676 struct ieee80211_rx_status *stats)
677 {
678 u16 fc = le16_to_cpu(hdr->frame_control);
679
680 /*
681 * All contexts have the same setting here due to it being
682 * a module parameter, so OK to check any context.
683 */
684 if (priv->contexts[IWL_RXON_CTX_BSS].active.filter_flags &
685 RXON_FILTER_DIS_DECRYPT_MSK)
686 return 0;
687
688 if (!(fc & IEEE80211_FCTL_PROTECTED))
689 return 0;
690
691 IWL_DEBUG_RX(priv, "decrypt_res:0x%x\n", decrypt_res);
692 switch (decrypt_res & RX_RES_STATUS_SEC_TYPE_MSK) {
693 case RX_RES_STATUS_SEC_TYPE_TKIP:
694 /* The uCode has got a bad phase 1 Key, pushes the packet.
695 * Decryption will be done in SW. */
696 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
697 RX_RES_STATUS_BAD_KEY_TTAK)
698 break;
699
700 case RX_RES_STATUS_SEC_TYPE_WEP:
701 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
702 RX_RES_STATUS_BAD_ICV_MIC) {
703 /* bad ICV, the packet is destroyed since the
704 * decryption is inplace, drop it */
705 IWL_DEBUG_RX(priv, "Packet destroyed\n");
706 return -1;
707 }
708 case RX_RES_STATUS_SEC_TYPE_CCMP:
709 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
710 RX_RES_STATUS_DECRYPT_OK) {
711 IWL_DEBUG_RX(priv, "hw decrypt successfully!!!\n");
712 stats->flag |= RX_FLAG_DECRYPTED;
713 }
714 break;
715
716 default:
717 break;
718 }
719 return 0;
720 }
721
722 static void iwlagn_pass_packet_to_mac80211(struct iwl_priv *priv,
723 struct ieee80211_hdr *hdr,
724 u16 len,
725 u32 ampdu_status,
726 struct iwl_rx_cmd_buffer *rxb,
727 struct ieee80211_rx_status *stats)
728 {
729 struct sk_buff *skb;
730 __le16 fc = hdr->frame_control;
731 struct iwl_rxon_context *ctx;
732 unsigned int hdrlen, fraglen;
733
734 /* We only process data packets if the interface is open */
735 if (unlikely(!priv->is_open)) {
736 IWL_DEBUG_DROP_LIMIT(priv,
737 "Dropping packet while interface is not open.\n");
738 return;
739 }
740
741 /* In case of HW accelerated crypto and bad decryption, drop */
742 if (!iwlwifi_mod_params.sw_crypto &&
743 iwlagn_set_decrypted_flag(priv, hdr, ampdu_status, stats))
744 return;
745
746 /* Dont use dev_alloc_skb(), we'll have enough headroom once
747 * ieee80211_hdr pulled.
748 */
749 skb = alloc_skb(128, GFP_ATOMIC);
750 if (!skb) {
751 IWL_ERR(priv, "alloc_skb failed\n");
752 return;
753 }
754 /* If frame is small enough to fit in skb->head, pull it completely.
755 * If not, only pull ieee80211_hdr so that splice() or TCP coalesce
756 * are more efficient.
757 */
758 hdrlen = (len <= skb_tailroom(skb)) ? len : sizeof(*hdr);
759
760 memcpy(skb_put(skb, hdrlen), hdr, hdrlen);
761 fraglen = len - hdrlen;
762
763 if (fraglen) {
764 int offset = (void *)hdr + hdrlen -
765 rxb_addr(rxb) + rxb_offset(rxb);
766
767 skb_add_rx_frag(skb, 0, rxb_steal_page(rxb), offset,
768 fraglen, rxb->truesize);
769 }
770
771 /*
772 * Wake any queues that were stopped due to a passive channel tx
773 * failure. This can happen because the regulatory enforcement in
774 * the device waits for a beacon before allowing transmission,
775 * sometimes even after already having transmitted frames for the
776 * association because the new RXON may reset the information.
777 */
778 if (unlikely(ieee80211_is_beacon(fc) && priv->passive_no_rx)) {
779 for_each_context(priv, ctx) {
780 if (!ether_addr_equal(hdr->addr3,
781 ctx->active.bssid_addr))
782 continue;
783 iwlagn_lift_passive_no_rx(priv);
784 }
785 }
786
787 memcpy(IEEE80211_SKB_RXCB(skb), stats, sizeof(*stats));
788
789 ieee80211_rx_ni(priv->hw, skb);
790 }
791
792 static u32 iwlagn_translate_rx_status(struct iwl_priv *priv, u32 decrypt_in)
793 {
794 u32 decrypt_out = 0;
795
796 if ((decrypt_in & RX_RES_STATUS_STATION_FOUND) ==
797 RX_RES_STATUS_STATION_FOUND)
798 decrypt_out |= (RX_RES_STATUS_STATION_FOUND |
799 RX_RES_STATUS_NO_STATION_INFO_MISMATCH);
800
801 decrypt_out |= (decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK);
802
803 /* packet was not encrypted */
804 if ((decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) ==
805 RX_RES_STATUS_SEC_TYPE_NONE)
806 return decrypt_out;
807
808 /* packet was encrypted with unknown alg */
809 if ((decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) ==
810 RX_RES_STATUS_SEC_TYPE_ERR)
811 return decrypt_out;
812
813 /* decryption was not done in HW */
814 if ((decrypt_in & RX_MPDU_RES_STATUS_DEC_DONE_MSK) !=
815 RX_MPDU_RES_STATUS_DEC_DONE_MSK)
816 return decrypt_out;
817
818 switch (decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) {
819
820 case RX_RES_STATUS_SEC_TYPE_CCMP:
821 /* alg is CCM: check MIC only */
822 if (!(decrypt_in & RX_MPDU_RES_STATUS_MIC_OK))
823 /* Bad MIC */
824 decrypt_out |= RX_RES_STATUS_BAD_ICV_MIC;
825 else
826 decrypt_out |= RX_RES_STATUS_DECRYPT_OK;
827
828 break;
829
830 case RX_RES_STATUS_SEC_TYPE_TKIP:
831 if (!(decrypt_in & RX_MPDU_RES_STATUS_TTAK_OK)) {
832 /* Bad TTAK */
833 decrypt_out |= RX_RES_STATUS_BAD_KEY_TTAK;
834 break;
835 }
836 /* fall through if TTAK OK */
837 default:
838 if (!(decrypt_in & RX_MPDU_RES_STATUS_ICV_OK))
839 decrypt_out |= RX_RES_STATUS_BAD_ICV_MIC;
840 else
841 decrypt_out |= RX_RES_STATUS_DECRYPT_OK;
842 break;
843 }
844
845 IWL_DEBUG_RX(priv, "decrypt_in:0x%x decrypt_out = 0x%x\n",
846 decrypt_in, decrypt_out);
847
848 return decrypt_out;
849 }
850
851 /* Calc max signal level (dBm) among 3 possible receivers */
852 static int iwlagn_calc_rssi(struct iwl_priv *priv,
853 struct iwl_rx_phy_res *rx_resp)
854 {
855 /* data from PHY/DSP regarding signal strength, etc.,
856 * contents are always there, not configurable by host
857 */
858 struct iwlagn_non_cfg_phy *ncphy =
859 (struct iwlagn_non_cfg_phy *)rx_resp->non_cfg_phy_buf;
860 u32 val, rssi_a, rssi_b, rssi_c, max_rssi;
861 u8 agc;
862
863 val = le32_to_cpu(ncphy->non_cfg_phy[IWLAGN_RX_RES_AGC_IDX]);
864 agc = (val & IWLAGN_OFDM_AGC_MSK) >> IWLAGN_OFDM_AGC_BIT_POS;
865
866 /* Find max rssi among 3 possible receivers.
867 * These values are measured by the digital signal processor (DSP).
868 * They should stay fairly constant even as the signal strength varies,
869 * if the radio's automatic gain control (AGC) is working right.
870 * AGC value (see below) will provide the "interesting" info.
871 */
872 val = le32_to_cpu(ncphy->non_cfg_phy[IWLAGN_RX_RES_RSSI_AB_IDX]);
873 rssi_a = (val & IWLAGN_OFDM_RSSI_INBAND_A_BITMSK) >>
874 IWLAGN_OFDM_RSSI_A_BIT_POS;
875 rssi_b = (val & IWLAGN_OFDM_RSSI_INBAND_B_BITMSK) >>
876 IWLAGN_OFDM_RSSI_B_BIT_POS;
877 val = le32_to_cpu(ncphy->non_cfg_phy[IWLAGN_RX_RES_RSSI_C_IDX]);
878 rssi_c = (val & IWLAGN_OFDM_RSSI_INBAND_C_BITMSK) >>
879 IWLAGN_OFDM_RSSI_C_BIT_POS;
880
881 max_rssi = max_t(u32, rssi_a, rssi_b);
882 max_rssi = max_t(u32, max_rssi, rssi_c);
883
884 IWL_DEBUG_STATS(priv, "Rssi In A %d B %d C %d Max %d AGC dB %d\n",
885 rssi_a, rssi_b, rssi_c, max_rssi, agc);
886
887 /* dBm = max_rssi dB - agc dB - constant.
888 * Higher AGC (higher radio gain) means lower signal. */
889 return max_rssi - agc - IWLAGN_RSSI_OFFSET;
890 }
891
892 /* Called for REPLY_RX_MPDU_CMD */
893 static int iwlagn_rx_reply_rx(struct iwl_priv *priv,
894 struct iwl_rx_cmd_buffer *rxb,
895 struct iwl_device_cmd *cmd)
896 {
897 struct ieee80211_hdr *header;
898 struct ieee80211_rx_status rx_status = {};
899 struct iwl_rx_packet *pkt = rxb_addr(rxb);
900 struct iwl_rx_phy_res *phy_res;
901 __le32 rx_pkt_status;
902 struct iwl_rx_mpdu_res_start *amsdu;
903 u32 len;
904 u32 ampdu_status;
905 u32 rate_n_flags;
906
907 if (!priv->last_phy_res_valid) {
908 IWL_ERR(priv, "MPDU frame without cached PHY data\n");
909 return 0;
910 }
911 phy_res = &priv->last_phy_res;
912 amsdu = (struct iwl_rx_mpdu_res_start *)pkt->data;
913 header = (struct ieee80211_hdr *)(pkt->data + sizeof(*amsdu));
914 len = le16_to_cpu(amsdu->byte_count);
915 rx_pkt_status = *(__le32 *)(pkt->data + sizeof(*amsdu) + len);
916 ampdu_status = iwlagn_translate_rx_status(priv,
917 le32_to_cpu(rx_pkt_status));
918
919 if ((unlikely(phy_res->cfg_phy_cnt > 20))) {
920 IWL_DEBUG_DROP(priv, "dsp size out of range [0,20]: %d\n",
921 phy_res->cfg_phy_cnt);
922 return 0;
923 }
924
925 if (!(rx_pkt_status & RX_RES_STATUS_NO_CRC32_ERROR) ||
926 !(rx_pkt_status & RX_RES_STATUS_NO_RXE_OVERFLOW)) {
927 IWL_DEBUG_RX(priv, "Bad CRC or FIFO: 0x%08X.\n",
928 le32_to_cpu(rx_pkt_status));
929 return 0;
930 }
931
932 /* This will be used in several places later */
933 rate_n_flags = le32_to_cpu(phy_res->rate_n_flags);
934
935 /* rx_status carries information about the packet to mac80211 */
936 rx_status.mactime = le64_to_cpu(phy_res->timestamp);
937 rx_status.band = (phy_res->phy_flags & RX_RES_PHY_FLAGS_BAND_24_MSK) ?
938 IEEE80211_BAND_2GHZ : IEEE80211_BAND_5GHZ;
939 rx_status.freq =
940 ieee80211_channel_to_frequency(le16_to_cpu(phy_res->channel),
941 rx_status.band);
942 rx_status.rate_idx =
943 iwlagn_hwrate_to_mac80211_idx(rate_n_flags, rx_status.band);
944 rx_status.flag = 0;
945
946 /* TSF isn't reliable. In order to allow smooth user experience,
947 * this W/A doesn't propagate it to the mac80211 */
948 /*rx_status.flag |= RX_FLAG_MACTIME_START;*/
949
950 priv->ucode_beacon_time = le32_to_cpu(phy_res->beacon_time_stamp);
951
952 /* Find max signal strength (dBm) among 3 antenna/receiver chains */
953 rx_status.signal = iwlagn_calc_rssi(priv, phy_res);
954
955 IWL_DEBUG_STATS_LIMIT(priv, "Rssi %d, TSF %llu\n",
956 rx_status.signal, (unsigned long long)rx_status.mactime);
957
958 /*
959 * "antenna number"
960 *
961 * It seems that the antenna field in the phy flags value
962 * is actually a bit field. This is undefined by radiotap,
963 * it wants an actual antenna number but I always get "7"
964 * for most legacy frames I receive indicating that the
965 * same frame was received on all three RX chains.
966 *
967 * I think this field should be removed in favor of a
968 * new 802.11n radiotap field "RX chains" that is defined
969 * as a bitmask.
970 */
971 rx_status.antenna =
972 (le16_to_cpu(phy_res->phy_flags) & RX_RES_PHY_FLAGS_ANTENNA_MSK)
973 >> RX_RES_PHY_FLAGS_ANTENNA_POS;
974
975 /* set the preamble flag if appropriate */
976 if (phy_res->phy_flags & RX_RES_PHY_FLAGS_SHORT_PREAMBLE_MSK)
977 rx_status.flag |= RX_FLAG_SHORTPRE;
978
979 if (phy_res->phy_flags & RX_RES_PHY_FLAGS_AGG_MSK) {
980 /*
981 * We know which subframes of an A-MPDU belong
982 * together since we get a single PHY response
983 * from the firmware for all of them
984 */
985 rx_status.flag |= RX_FLAG_AMPDU_DETAILS;
986 rx_status.ampdu_reference = priv->ampdu_ref;
987 }
988
989 /* Set up the HT phy flags */
990 if (rate_n_flags & RATE_MCS_HT_MSK)
991 rx_status.flag |= RX_FLAG_HT;
992 if (rate_n_flags & RATE_MCS_HT40_MSK)
993 rx_status.flag |= RX_FLAG_40MHZ;
994 if (rate_n_flags & RATE_MCS_SGI_MSK)
995 rx_status.flag |= RX_FLAG_SHORT_GI;
996 if (rate_n_flags & RATE_MCS_GF_MSK)
997 rx_status.flag |= RX_FLAG_HT_GF;
998
999 iwlagn_pass_packet_to_mac80211(priv, header, len, ampdu_status,
1000 rxb, &rx_status);
1001 return 0;
1002 }
1003
1004 static int iwlagn_rx_noa_notification(struct iwl_priv *priv,
1005 struct iwl_rx_cmd_buffer *rxb,
1006 struct iwl_device_cmd *cmd)
1007 {
1008 struct iwl_wipan_noa_data *new_data, *old_data;
1009 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1010 struct iwl_wipan_noa_notification *noa_notif = (void *)pkt->data;
1011
1012 /* no condition -- we're in softirq */
1013 old_data = rcu_dereference_protected(priv->noa_data, true);
1014
1015 if (noa_notif->noa_active) {
1016 u32 len = le16_to_cpu(noa_notif->noa_attribute.length);
1017 u32 copylen = len;
1018
1019 /* EID, len, OUI, subtype */
1020 len += 1 + 1 + 3 + 1;
1021 /* P2P id, P2P length */
1022 len += 1 + 2;
1023 copylen += 1 + 2;
1024
1025 new_data = kmalloc(sizeof(*new_data) + len, GFP_ATOMIC);
1026 if (new_data) {
1027 new_data->length = len;
1028 new_data->data[0] = WLAN_EID_VENDOR_SPECIFIC;
1029 new_data->data[1] = len - 2; /* not counting EID, len */
1030 new_data->data[2] = (WLAN_OUI_WFA >> 16) & 0xff;
1031 new_data->data[3] = (WLAN_OUI_WFA >> 8) & 0xff;
1032 new_data->data[4] = (WLAN_OUI_WFA >> 0) & 0xff;
1033 new_data->data[5] = WLAN_OUI_TYPE_WFA_P2P;
1034 memcpy(&new_data->data[6], &noa_notif->noa_attribute,
1035 copylen);
1036 }
1037 } else
1038 new_data = NULL;
1039
1040 rcu_assign_pointer(priv->noa_data, new_data);
1041
1042 if (old_data)
1043 kfree_rcu(old_data, rcu_head);
1044
1045 return 0;
1046 }
1047
1048 /**
1049 * iwl_setup_rx_handlers - Initialize Rx handler callbacks
1050 *
1051 * Setup the RX handlers for each of the reply types sent from the uCode
1052 * to the host.
1053 */
1054 void iwl_setup_rx_handlers(struct iwl_priv *priv)
1055 {
1056 int (**handlers)(struct iwl_priv *priv, struct iwl_rx_cmd_buffer *rxb,
1057 struct iwl_device_cmd *cmd);
1058
1059 handlers = priv->rx_handlers;
1060
1061 handlers[REPLY_ERROR] = iwlagn_rx_reply_error;
1062 handlers[CHANNEL_SWITCH_NOTIFICATION] = iwlagn_rx_csa;
1063 handlers[SPECTRUM_MEASURE_NOTIFICATION] =
1064 iwlagn_rx_spectrum_measure_notif;
1065 handlers[PM_SLEEP_NOTIFICATION] = iwlagn_rx_pm_sleep_notif;
1066 handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
1067 iwlagn_rx_pm_debug_statistics_notif;
1068 handlers[BEACON_NOTIFICATION] = iwlagn_rx_beacon_notif;
1069 handlers[REPLY_ADD_STA] = iwl_add_sta_callback;
1070
1071 handlers[REPLY_WIPAN_NOA_NOTIFICATION] = iwlagn_rx_noa_notification;
1072
1073 /*
1074 * The same handler is used for both the REPLY to a discrete
1075 * statistics request from the host as well as for the periodic
1076 * statistics notifications (after received beacons) from the uCode.
1077 */
1078 handlers[REPLY_STATISTICS_CMD] = iwlagn_rx_reply_statistics;
1079 handlers[STATISTICS_NOTIFICATION] = iwlagn_rx_statistics;
1080
1081 iwl_setup_rx_scan_handlers(priv);
1082
1083 handlers[CARD_STATE_NOTIFICATION] = iwlagn_rx_card_state_notif;
1084 handlers[MISSED_BEACONS_NOTIFICATION] =
1085 iwlagn_rx_missed_beacon_notif;
1086
1087 /* Rx handlers */
1088 handlers[REPLY_RX_PHY_CMD] = iwlagn_rx_reply_rx_phy;
1089 handlers[REPLY_RX_MPDU_CMD] = iwlagn_rx_reply_rx;
1090
1091 /* block ack */
1092 handlers[REPLY_COMPRESSED_BA] =
1093 iwlagn_rx_reply_compressed_ba;
1094
1095 priv->rx_handlers[REPLY_TX] = iwlagn_rx_reply_tx;
1096
1097 /* set up notification wait support */
1098 iwl_notification_wait_init(&priv->notif_wait);
1099
1100 /* Set up BT Rx handlers */
1101 if (priv->lib->bt_params)
1102 iwlagn_bt_rx_handler_setup(priv);
1103 }
1104
1105 int iwl_rx_dispatch(struct iwl_op_mode *op_mode, struct iwl_rx_cmd_buffer *rxb,
1106 struct iwl_device_cmd *cmd)
1107 {
1108 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1109 struct iwl_priv *priv = IWL_OP_MODE_GET_DVM(op_mode);
1110 int err = 0;
1111
1112 /*
1113 * Do the notification wait before RX handlers so
1114 * even if the RX handler consumes the RXB we have
1115 * access to it in the notification wait entry.
1116 */
1117 iwl_notification_wait_notify(&priv->notif_wait, pkt);
1118
1119 /* Based on type of command response or notification,
1120 * handle those that need handling via function in
1121 * rx_handlers table. See iwl_setup_rx_handlers() */
1122 if (priv->rx_handlers[pkt->hdr.cmd]) {
1123 priv->rx_handlers_stats[pkt->hdr.cmd]++;
1124 err = priv->rx_handlers[pkt->hdr.cmd] (priv, rxb, cmd);
1125 } else {
1126 /* No handling needed */
1127 IWL_DEBUG_RX(priv, "No handler needed for %s, 0x%02x\n",
1128 iwl_dvm_get_cmd_string(pkt->hdr.cmd),
1129 pkt->hdr.cmd);
1130 }
1131 return err;
1132 }
Linux with added FPC-III support