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ARM: mm: Recreate kernel mappings in early_paging_init()
[linux/fpc-iii.git] / drivers / net / wireless / iwlwifi / dvm / rx.c
blobd71776dd1e6adcc16a0a9baa7e557588b2e1b27c
1 /******************************************************************************
2 *
3 * Copyright(c) 2003 - 2013 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 =
209 le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK;
210 IWL_DEBUG_RADIO(priv, "Dumping %d bytes of unhandled "
211 "notification for PM_DEBUG_STATISTIC_NOTIFIC:\n", len);
212 iwl_print_hex_dump(priv, IWL_DL_RADIO, pkt->data, len);
213 return 0;
214 }
215
216 static int iwlagn_rx_beacon_notif(struct iwl_priv *priv,
217 struct iwl_rx_cmd_buffer *rxb,
218 struct iwl_device_cmd *cmd)
219 {
220 struct iwl_rx_packet *pkt = rxb_addr(rxb);
221 struct iwlagn_beacon_notif *beacon = (void *)pkt->data;
222 #ifdef CONFIG_IWLWIFI_DEBUG
223 u16 status = le16_to_cpu(beacon->beacon_notify_hdr.status.status);
224 u8 rate = iwl_hw_get_rate(beacon->beacon_notify_hdr.rate_n_flags);
225
226 IWL_DEBUG_RX(priv, "beacon status %#x, retries:%d ibssmgr:%d "
227 "tsf:0x%.8x%.8x rate:%d\n",
228 status & TX_STATUS_MSK,
229 beacon->beacon_notify_hdr.failure_frame,
230 le32_to_cpu(beacon->ibss_mgr_status),
231 le32_to_cpu(beacon->high_tsf),
232 le32_to_cpu(beacon->low_tsf), rate);
233 #endif
234
235 priv->ibss_manager = le32_to_cpu(beacon->ibss_mgr_status);
236
237 return 0;
238 }
239
240 /**
241 * iwl_good_plcp_health - checks for plcp error.
242 *
243 * When the plcp error is exceeding the thresholds, reset the radio
244 * to improve the throughput.
245 */
246 static bool iwlagn_good_plcp_health(struct iwl_priv *priv,
247 struct statistics_rx_phy *cur_ofdm,
248 struct statistics_rx_ht_phy *cur_ofdm_ht,
249 unsigned int msecs)
250 {
251 int delta;
252 int threshold = priv->plcp_delta_threshold;
253
254 if (threshold == IWL_MAX_PLCP_ERR_THRESHOLD_DISABLE) {
255 IWL_DEBUG_RADIO(priv, "plcp_err check disabled\n");
256 return true;
257 }
258
259 delta = le32_to_cpu(cur_ofdm->plcp_err) -
260 le32_to_cpu(priv->statistics.rx_ofdm.plcp_err) +
261 le32_to_cpu(cur_ofdm_ht->plcp_err) -
262 le32_to_cpu(priv->statistics.rx_ofdm_ht.plcp_err);
263
264 /* Can be negative if firmware reset statistics */
265 if (delta <= 0)
266 return true;
267
268 if ((delta * 100 / msecs) > threshold) {
269 IWL_DEBUG_RADIO(priv,
270 "plcp health threshold %u delta %d msecs %u\n",
271 threshold, delta, msecs);
272 return false;
273 }
274
275 return true;
276 }
277
278 int iwl_force_rf_reset(struct iwl_priv *priv, bool external)
279 {
280 struct iwl_rf_reset *rf_reset;
281
282 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
283 return -EAGAIN;
284
285 if (!iwl_is_any_associated(priv)) {
286 IWL_DEBUG_SCAN(priv, "force reset rejected: not associated\n");
287 return -ENOLINK;
288 }
289
290 rf_reset = &priv->rf_reset;
291 rf_reset->reset_request_count++;
292 if (!external && rf_reset->last_reset_jiffies &&
293 time_after(rf_reset->last_reset_jiffies +
294 IWL_DELAY_NEXT_FORCE_RF_RESET, jiffies)) {
295 IWL_DEBUG_INFO(priv, "RF reset rejected\n");
296 rf_reset->reset_reject_count++;
297 return -EAGAIN;
298 }
299 rf_reset->reset_success_count++;
300 rf_reset->last_reset_jiffies = jiffies;
301
302 /*
303 * There is no easy and better way to force reset the radio,
304 * the only known method is switching channel which will force to
305 * reset and tune the radio.
306 * Use internal short scan (single channel) operation to should
307 * achieve this objective.
308 * Driver should reset the radio when number of consecutive missed
309 * beacon, or any other uCode error condition detected.
310 */
311 IWL_DEBUG_INFO(priv, "perform radio reset.\n");
312 iwl_internal_short_hw_scan(priv);
313 return 0;
314 }
315
316
317 static void iwlagn_recover_from_statistics(struct iwl_priv *priv,
318 struct statistics_rx_phy *cur_ofdm,
319 struct statistics_rx_ht_phy *cur_ofdm_ht,
320 struct statistics_tx *tx,
321 unsigned long stamp)
322 {
323 unsigned int msecs;
324
325 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
326 return;
327
328 msecs = jiffies_to_msecs(stamp - priv->rx_statistics_jiffies);
329
330 /* Only gather statistics and update time stamp when not associated */
331 if (!iwl_is_any_associated(priv))
332 return;
333
334 /* Do not check/recover when do not have enough statistics data */
335 if (msecs < 99)
336 return;
337
338 if (!iwlagn_good_plcp_health(priv, cur_ofdm, cur_ofdm_ht, msecs))
339 iwl_force_rf_reset(priv, false);
340 }
341
342 /* Calculate noise level, based on measurements during network silence just
343 * before arriving beacon. This measurement can be done only if we know
344 * exactly when to expect beacons, therefore only when we're associated. */
345 static void iwlagn_rx_calc_noise(struct iwl_priv *priv)
346 {
347 struct statistics_rx_non_phy *rx_info;
348 int num_active_rx = 0;
349 int total_silence = 0;
350 int bcn_silence_a, bcn_silence_b, bcn_silence_c;
351 int last_rx_noise;
352
353 rx_info = &priv->statistics.rx_non_phy;
354
355 bcn_silence_a =
356 le32_to_cpu(rx_info->beacon_silence_rssi_a) & IN_BAND_FILTER;
357 bcn_silence_b =
358 le32_to_cpu(rx_info->beacon_silence_rssi_b) & IN_BAND_FILTER;
359 bcn_silence_c =
360 le32_to_cpu(rx_info->beacon_silence_rssi_c) & IN_BAND_FILTER;
361
362 if (bcn_silence_a) {
363 total_silence += bcn_silence_a;
364 num_active_rx++;
365 }
366 if (bcn_silence_b) {
367 total_silence += bcn_silence_b;
368 num_active_rx++;
369 }
370 if (bcn_silence_c) {
371 total_silence += bcn_silence_c;
372 num_active_rx++;
373 }
374
375 /* Average among active antennas */
376 if (num_active_rx)
377 last_rx_noise = (total_silence / num_active_rx) - 107;
378 else
379 last_rx_noise = IWL_NOISE_MEAS_NOT_AVAILABLE;
380
381 IWL_DEBUG_CALIB(priv, "inband silence a %u, b %u, c %u, dBm %d\n",
382 bcn_silence_a, bcn_silence_b, bcn_silence_c,
383 last_rx_noise);
384 }
385
386 #ifdef CONFIG_IWLWIFI_DEBUGFS
387 /*
388 * based on the assumption of all statistics counter are in DWORD
389 * FIXME: This function is for debugging, do not deal with
390 * the case of counters roll-over.
391 */
392 static void accum_stats(__le32 *prev, __le32 *cur, __le32 *delta,
393 __le32 *max_delta, __le32 *accum, int size)
394 {
395 int i;
396
397 for (i = 0;
398 i < size / sizeof(__le32);
399 i++, prev++, cur++, delta++, max_delta++, accum++) {
400 if (le32_to_cpu(*cur) > le32_to_cpu(*prev)) {
401 *delta = cpu_to_le32(
402 le32_to_cpu(*cur) - le32_to_cpu(*prev));
403 le32_add_cpu(accum, le32_to_cpu(*delta));
404 if (le32_to_cpu(*delta) > le32_to_cpu(*max_delta))
405 *max_delta = *delta;
406 }
407 }
408 }
409
410 static void
411 iwlagn_accumulative_statistics(struct iwl_priv *priv,
412 struct statistics_general_common *common,
413 struct statistics_rx_non_phy *rx_non_phy,
414 struct statistics_rx_phy *rx_ofdm,
415 struct statistics_rx_ht_phy *rx_ofdm_ht,
416 struct statistics_rx_phy *rx_cck,
417 struct statistics_tx *tx,
418 struct statistics_bt_activity *bt_activity)
419 {
420 #define ACCUM(_name) \
421 accum_stats((__le32 *)&priv->statistics._name, \
422 (__le32 *)_name, \
423 (__le32 *)&priv->delta_stats._name, \
424 (__le32 *)&priv->max_delta_stats._name, \
425 (__le32 *)&priv->accum_stats._name, \
426 sizeof(*_name));
427
428 ACCUM(common);
429 ACCUM(rx_non_phy);
430 ACCUM(rx_ofdm);
431 ACCUM(rx_ofdm_ht);
432 ACCUM(rx_cck);
433 ACCUM(tx);
434 if (bt_activity)
435 ACCUM(bt_activity);
436 #undef ACCUM
437 }
438 #else
439 static inline void
440 iwlagn_accumulative_statistics(struct iwl_priv *priv,
441 struct statistics_general_common *common,
442 struct statistics_rx_non_phy *rx_non_phy,
443 struct statistics_rx_phy *rx_ofdm,
444 struct statistics_rx_ht_phy *rx_ofdm_ht,
445 struct statistics_rx_phy *rx_cck,
446 struct statistics_tx *tx,
447 struct statistics_bt_activity *bt_activity)
448 {
449 }
450 #endif
451
452 static int iwlagn_rx_statistics(struct iwl_priv *priv,
453 struct iwl_rx_cmd_buffer *rxb,
454 struct iwl_device_cmd *cmd)
455 {
456 unsigned long stamp = jiffies;
457 const int reg_recalib_period = 60;
458 int change;
459 struct iwl_rx_packet *pkt = rxb_addr(rxb);
460 u32 len = le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK;
461 __le32 *flag;
462 struct statistics_general_common *common;
463 struct statistics_rx_non_phy *rx_non_phy;
464 struct statistics_rx_phy *rx_ofdm;
465 struct statistics_rx_ht_phy *rx_ofdm_ht;
466 struct statistics_rx_phy *rx_cck;
467 struct statistics_tx *tx;
468 struct statistics_bt_activity *bt_activity;
469
470 len -= sizeof(struct iwl_cmd_header); /* skip header */
471
472 IWL_DEBUG_RX(priv, "Statistics notification received (%d bytes).\n",
473 len);
474
475 spin_lock(&priv->statistics.lock);
476
477 if (len == sizeof(struct iwl_bt_notif_statistics)) {
478 struct iwl_bt_notif_statistics *stats;
479 stats = (void *)&pkt->data;
480 flag = &stats->flag;
481 common = &stats->general.common;
482 rx_non_phy = &stats->rx.general.common;
483 rx_ofdm = &stats->rx.ofdm;
484 rx_ofdm_ht = &stats->rx.ofdm_ht;
485 rx_cck = &stats->rx.cck;
486 tx = &stats->tx;
487 bt_activity = &stats->general.activity;
488
489 #ifdef CONFIG_IWLWIFI_DEBUGFS
490 /* handle this exception directly */
491 priv->statistics.num_bt_kills = stats->rx.general.num_bt_kills;
492 le32_add_cpu(&priv->statistics.accum_num_bt_kills,
493 le32_to_cpu(stats->rx.general.num_bt_kills));
494 #endif
495 } else if (len == sizeof(struct iwl_notif_statistics)) {
496 struct iwl_notif_statistics *stats;
497 stats = (void *)&pkt->data;
498 flag = &stats->flag;
499 common = &stats->general.common;
500 rx_non_phy = &stats->rx.general;
501 rx_ofdm = &stats->rx.ofdm;
502 rx_ofdm_ht = &stats->rx.ofdm_ht;
503 rx_cck = &stats->rx.cck;
504 tx = &stats->tx;
505 bt_activity = NULL;
506 } else {
507 WARN_ONCE(1, "len %d doesn't match BT (%zu) or normal (%zu)\n",
508 len, sizeof(struct iwl_bt_notif_statistics),
509 sizeof(struct iwl_notif_statistics));
510 spin_unlock(&priv->statistics.lock);
511 return 0;
512 }
513
514 change = common->temperature != priv->statistics.common.temperature ||
515 (*flag & STATISTICS_REPLY_FLG_HT40_MODE_MSK) !=
516 (priv->statistics.flag & STATISTICS_REPLY_FLG_HT40_MODE_MSK);
517
518 iwlagn_accumulative_statistics(priv, common, rx_non_phy, rx_ofdm,
519 rx_ofdm_ht, rx_cck, tx, bt_activity);
520
521 iwlagn_recover_from_statistics(priv, rx_ofdm, rx_ofdm_ht, tx, stamp);
522
523 priv->statistics.flag = *flag;
524 memcpy(&priv->statistics.common, common, sizeof(*common));
525 memcpy(&priv->statistics.rx_non_phy, rx_non_phy, sizeof(*rx_non_phy));
526 memcpy(&priv->statistics.rx_ofdm, rx_ofdm, sizeof(*rx_ofdm));
527 memcpy(&priv->statistics.rx_ofdm_ht, rx_ofdm_ht, sizeof(*rx_ofdm_ht));
528 memcpy(&priv->statistics.rx_cck, rx_cck, sizeof(*rx_cck));
529 memcpy(&priv->statistics.tx, tx, sizeof(*tx));
530 #ifdef CONFIG_IWLWIFI_DEBUGFS
531 if (bt_activity)
532 memcpy(&priv->statistics.bt_activity, bt_activity,
533 sizeof(*bt_activity));
534 #endif
535
536 priv->rx_statistics_jiffies = stamp;
537
538 set_bit(STATUS_STATISTICS, &priv->status);
539
540 /* Reschedule the statistics timer to occur in
541 * reg_recalib_period seconds to ensure we get a
542 * thermal update even if the uCode doesn't give
543 * us one */
544 mod_timer(&priv->statistics_periodic, jiffies +
545 msecs_to_jiffies(reg_recalib_period * 1000));
546
547 if (unlikely(!test_bit(STATUS_SCANNING, &priv->status)) &&
548 (pkt->hdr.cmd == STATISTICS_NOTIFICATION)) {
549 iwlagn_rx_calc_noise(priv);
550 queue_work(priv->workqueue, &priv->run_time_calib_work);
551 }
552 if (priv->lib->temperature && change)
553 priv->lib->temperature(priv);
554
555 spin_unlock(&priv->statistics.lock);
556
557 return 0;
558 }
559
560 static int iwlagn_rx_reply_statistics(struct iwl_priv *priv,
561 struct iwl_rx_cmd_buffer *rxb,
562 struct iwl_device_cmd *cmd)
563 {
564 struct iwl_rx_packet *pkt = rxb_addr(rxb);
565 struct iwl_notif_statistics *stats = (void *)pkt->data;
566
567 if (le32_to_cpu(stats->flag) & UCODE_STATISTICS_CLEAR_MSK) {
568 #ifdef CONFIG_IWLWIFI_DEBUGFS
569 memset(&priv->accum_stats, 0,
570 sizeof(priv->accum_stats));
571 memset(&priv->delta_stats, 0,
572 sizeof(priv->delta_stats));
573 memset(&priv->max_delta_stats, 0,
574 sizeof(priv->max_delta_stats));
575 #endif
576 IWL_DEBUG_RX(priv, "Statistics have been cleared\n");
577 }
578 iwlagn_rx_statistics(priv, rxb, cmd);
579 return 0;
580 }
581
582 /* Handle notification from uCode that card's power state is changing
583 * due to software, hardware, or critical temperature RFKILL */
584 static int iwlagn_rx_card_state_notif(struct iwl_priv *priv,
585 struct iwl_rx_cmd_buffer *rxb,
586 struct iwl_device_cmd *cmd)
587 {
588 struct iwl_rx_packet *pkt = rxb_addr(rxb);
589 struct iwl_card_state_notif *card_state_notif = (void *)pkt->data;
590 u32 flags = le32_to_cpu(card_state_notif->flags);
591 unsigned long status = priv->status;
592
593 IWL_DEBUG_RF_KILL(priv, "Card state received: HW:%s SW:%s CT:%s\n",
594 (flags & HW_CARD_DISABLED) ? "Kill" : "On",
595 (flags & SW_CARD_DISABLED) ? "Kill" : "On",
596 (flags & CT_CARD_DISABLED) ?
597 "Reached" : "Not reached");
598
599 if (flags & (SW_CARD_DISABLED | HW_CARD_DISABLED |
600 CT_CARD_DISABLED)) {
601
602 iwl_write32(priv->trans, CSR_UCODE_DRV_GP1_SET,
603 CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
604
605 iwl_write_direct32(priv->trans, HBUS_TARG_MBX_C,
606 HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
607
608 if (!(flags & RXON_CARD_DISABLED)) {
609 iwl_write32(priv->trans, CSR_UCODE_DRV_GP1_CLR,
610 CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
611 iwl_write_direct32(priv->trans, HBUS_TARG_MBX_C,
612 HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
613 }
614 if (flags & CT_CARD_DISABLED)
615 iwl_tt_enter_ct_kill(priv);
616 }
617 if (!(flags & CT_CARD_DISABLED))
618 iwl_tt_exit_ct_kill(priv);
619
620 if (flags & HW_CARD_DISABLED)
621 set_bit(STATUS_RF_KILL_HW, &priv->status);
622 else
623 clear_bit(STATUS_RF_KILL_HW, &priv->status);
624
625
626 if (!(flags & RXON_CARD_DISABLED))
627 iwl_scan_cancel(priv);
628
629 if ((test_bit(STATUS_RF_KILL_HW, &status) !=
630 test_bit(STATUS_RF_KILL_HW, &priv->status)))
631 wiphy_rfkill_set_hw_state(priv->hw->wiphy,
632 test_bit(STATUS_RF_KILL_HW, &priv->status));
633 return 0;
634 }
635
636 static int iwlagn_rx_missed_beacon_notif(struct iwl_priv *priv,
637 struct iwl_rx_cmd_buffer *rxb,
638 struct iwl_device_cmd *cmd)
639
640 {
641 struct iwl_rx_packet *pkt = rxb_addr(rxb);
642 struct iwl_missed_beacon_notif *missed_beacon = (void *)pkt->data;
643
644 if (le32_to_cpu(missed_beacon->consecutive_missed_beacons) >
645 priv->missed_beacon_threshold) {
646 IWL_DEBUG_CALIB(priv,
647 "missed bcn cnsq %d totl %d rcd %d expctd %d\n",
648 le32_to_cpu(missed_beacon->consecutive_missed_beacons),
649 le32_to_cpu(missed_beacon->total_missed_becons),
650 le32_to_cpu(missed_beacon->num_recvd_beacons),
651 le32_to_cpu(missed_beacon->num_expected_beacons));
652 if (!test_bit(STATUS_SCANNING, &priv->status))
653 iwl_init_sensitivity(priv);
654 }
655 return 0;
656 }
657
658 /* Cache phy data (Rx signal strength, etc) for HT frame (REPLY_RX_PHY_CMD).
659 * This will be used later in iwl_rx_reply_rx() for REPLY_RX_MPDU_CMD. */
660 static int iwlagn_rx_reply_rx_phy(struct iwl_priv *priv,
661 struct iwl_rx_cmd_buffer *rxb,
662 struct iwl_device_cmd *cmd)
663 {
664 struct iwl_rx_packet *pkt = rxb_addr(rxb);
665
666 priv->last_phy_res_valid = true;
667 priv->ampdu_ref++;
668 memcpy(&priv->last_phy_res, pkt->data,
669 sizeof(struct iwl_rx_phy_res));
670 return 0;
671 }
672
673 /*
674 * returns non-zero if packet should be dropped
675 */
676 static int iwlagn_set_decrypted_flag(struct iwl_priv *priv,
677 struct ieee80211_hdr *hdr,
678 u32 decrypt_res,
679 struct ieee80211_rx_status *stats)
680 {
681 u16 fc = le16_to_cpu(hdr->frame_control);
682
683 /*
684 * All contexts have the same setting here due to it being
685 * a module parameter, so OK to check any context.
686 */
687 if (priv->contexts[IWL_RXON_CTX_BSS].active.filter_flags &
688 RXON_FILTER_DIS_DECRYPT_MSK)
689 return 0;
690
691 if (!(fc & IEEE80211_FCTL_PROTECTED))
692 return 0;
693
694 IWL_DEBUG_RX(priv, "decrypt_res:0x%x\n", decrypt_res);
695 switch (decrypt_res & RX_RES_STATUS_SEC_TYPE_MSK) {
696 case RX_RES_STATUS_SEC_TYPE_TKIP:
697 /* The uCode has got a bad phase 1 Key, pushes the packet.
698 * Decryption will be done in SW. */
699 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
700 RX_RES_STATUS_BAD_KEY_TTAK)
701 break;
702
703 case RX_RES_STATUS_SEC_TYPE_WEP:
704 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
705 RX_RES_STATUS_BAD_ICV_MIC) {
706 /* bad ICV, the packet is destroyed since the
707 * decryption is inplace, drop it */
708 IWL_DEBUG_RX(priv, "Packet destroyed\n");
709 return -1;
710 }
711 case RX_RES_STATUS_SEC_TYPE_CCMP:
712 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
713 RX_RES_STATUS_DECRYPT_OK) {
714 IWL_DEBUG_RX(priv, "hw decrypt successfully!!!\n");
715 stats->flag |= RX_FLAG_DECRYPTED;
716 }
717 break;
718
719 default:
720 break;
721 }
722 return 0;
723 }
724
725 static void iwlagn_pass_packet_to_mac80211(struct iwl_priv *priv,
726 struct ieee80211_hdr *hdr,
727 u16 len,
728 u32 ampdu_status,
729 struct iwl_rx_cmd_buffer *rxb,
730 struct ieee80211_rx_status *stats)
731 {
732 struct sk_buff *skb;
733 __le16 fc = hdr->frame_control;
734 struct iwl_rxon_context *ctx;
735 unsigned int hdrlen, fraglen;
736
737 /* We only process data packets if the interface is open */
738 if (unlikely(!priv->is_open)) {
739 IWL_DEBUG_DROP_LIMIT(priv,
740 "Dropping packet while interface is not open.\n");
741 return;
742 }
743
744 /* In case of HW accelerated crypto and bad decryption, drop */
745 if (!iwlwifi_mod_params.sw_crypto &&
746 iwlagn_set_decrypted_flag(priv, hdr, ampdu_status, stats))
747 return;
748
749 /* Dont use dev_alloc_skb(), we'll have enough headroom once
750 * ieee80211_hdr pulled.
751 */
752 skb = alloc_skb(128, GFP_ATOMIC);
753 if (!skb) {
754 IWL_ERR(priv, "alloc_skb failed\n");
755 return;
756 }
757 /* If frame is small enough to fit in skb->head, pull it completely.
758 * If not, only pull ieee80211_hdr so that splice() or TCP coalesce
759 * are more efficient.
760 */
761 hdrlen = (len <= skb_tailroom(skb)) ? len : sizeof(*hdr);
762
763 memcpy(skb_put(skb, hdrlen), hdr, hdrlen);
764 fraglen = len - hdrlen;
765
766 if (fraglen) {
767 int offset = (void *)hdr + hdrlen -
768 rxb_addr(rxb) + rxb_offset(rxb);
769
770 skb_add_rx_frag(skb, 0, rxb_steal_page(rxb), offset,
771 fraglen, rxb->truesize);
772 }
773
774 /*
775 * Wake any queues that were stopped due to a passive channel tx
776 * failure. This can happen because the regulatory enforcement in
777 * the device waits for a beacon before allowing transmission,
778 * sometimes even after already having transmitted frames for the
779 * association because the new RXON may reset the information.
780 */
781 if (unlikely(ieee80211_is_beacon(fc) && priv->passive_no_rx)) {
782 for_each_context(priv, ctx) {
783 if (!ether_addr_equal(hdr->addr3,
784 ctx->active.bssid_addr))
785 continue;
786 iwlagn_lift_passive_no_rx(priv);
787 }
788 }
789
790 memcpy(IEEE80211_SKB_RXCB(skb), stats, sizeof(*stats));
791
792 ieee80211_rx_ni(priv->hw, skb);
793 }
794
795 static u32 iwlagn_translate_rx_status(struct iwl_priv *priv, u32 decrypt_in)
796 {
797 u32 decrypt_out = 0;
798
799 if ((decrypt_in & RX_RES_STATUS_STATION_FOUND) ==
800 RX_RES_STATUS_STATION_FOUND)
801 decrypt_out |= (RX_RES_STATUS_STATION_FOUND |
802 RX_RES_STATUS_NO_STATION_INFO_MISMATCH);
803
804 decrypt_out |= (decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK);
805
806 /* packet was not encrypted */
807 if ((decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) ==
808 RX_RES_STATUS_SEC_TYPE_NONE)
809 return decrypt_out;
810
811 /* packet was encrypted with unknown alg */
812 if ((decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) ==
813 RX_RES_STATUS_SEC_TYPE_ERR)
814 return decrypt_out;
815
816 /* decryption was not done in HW */
817 if ((decrypt_in & RX_MPDU_RES_STATUS_DEC_DONE_MSK) !=
818 RX_MPDU_RES_STATUS_DEC_DONE_MSK)
819 return decrypt_out;
820
821 switch (decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) {
822
823 case RX_RES_STATUS_SEC_TYPE_CCMP:
824 /* alg is CCM: check MIC only */
825 if (!(decrypt_in & RX_MPDU_RES_STATUS_MIC_OK))
826 /* Bad MIC */
827 decrypt_out |= RX_RES_STATUS_BAD_ICV_MIC;
828 else
829 decrypt_out |= RX_RES_STATUS_DECRYPT_OK;
830
831 break;
832
833 case RX_RES_STATUS_SEC_TYPE_TKIP:
834 if (!(decrypt_in & RX_MPDU_RES_STATUS_TTAK_OK)) {
835 /* Bad TTAK */
836 decrypt_out |= RX_RES_STATUS_BAD_KEY_TTAK;
837 break;
838 }
839 /* fall through if TTAK OK */
840 default:
841 if (!(decrypt_in & RX_MPDU_RES_STATUS_ICV_OK))
842 decrypt_out |= RX_RES_STATUS_BAD_ICV_MIC;
843 else
844 decrypt_out |= RX_RES_STATUS_DECRYPT_OK;
845 break;
846 }
847
848 IWL_DEBUG_RX(priv, "decrypt_in:0x%x decrypt_out = 0x%x\n",
849 decrypt_in, decrypt_out);
850
851 return decrypt_out;
852 }
853
854 /* Calc max signal level (dBm) among 3 possible receivers */
855 static int iwlagn_calc_rssi(struct iwl_priv *priv,
856 struct iwl_rx_phy_res *rx_resp)
857 {
858 /* data from PHY/DSP regarding signal strength, etc.,
859 * contents are always there, not configurable by host
860 */
861 struct iwlagn_non_cfg_phy *ncphy =
862 (struct iwlagn_non_cfg_phy *)rx_resp->non_cfg_phy_buf;
863 u32 val, rssi_a, rssi_b, rssi_c, max_rssi;
864 u8 agc;
865
866 val = le32_to_cpu(ncphy->non_cfg_phy[IWLAGN_RX_RES_AGC_IDX]);
867 agc = (val & IWLAGN_OFDM_AGC_MSK) >> IWLAGN_OFDM_AGC_BIT_POS;
868
869 /* Find max rssi among 3 possible receivers.
870 * These values are measured by the digital signal processor (DSP).
871 * They should stay fairly constant even as the signal strength varies,
872 * if the radio's automatic gain control (AGC) is working right.
873 * AGC value (see below) will provide the "interesting" info.
874 */
875 val = le32_to_cpu(ncphy->non_cfg_phy[IWLAGN_RX_RES_RSSI_AB_IDX]);
876 rssi_a = (val & IWLAGN_OFDM_RSSI_INBAND_A_BITMSK) >>
877 IWLAGN_OFDM_RSSI_A_BIT_POS;
878 rssi_b = (val & IWLAGN_OFDM_RSSI_INBAND_B_BITMSK) >>
879 IWLAGN_OFDM_RSSI_B_BIT_POS;
880 val = le32_to_cpu(ncphy->non_cfg_phy[IWLAGN_RX_RES_RSSI_C_IDX]);
881 rssi_c = (val & IWLAGN_OFDM_RSSI_INBAND_C_BITMSK) >>
882 IWLAGN_OFDM_RSSI_C_BIT_POS;
883
884 max_rssi = max_t(u32, rssi_a, rssi_b);
885 max_rssi = max_t(u32, max_rssi, rssi_c);
886
887 IWL_DEBUG_STATS(priv, "Rssi In A %d B %d C %d Max %d AGC dB %d\n",
888 rssi_a, rssi_b, rssi_c, max_rssi, agc);
889
890 /* dBm = max_rssi dB - agc dB - constant.
891 * Higher AGC (higher radio gain) means lower signal. */
892 return max_rssi - agc - IWLAGN_RSSI_OFFSET;
893 }
894
895 /* Called for REPLY_RX_MPDU_CMD */
896 static int iwlagn_rx_reply_rx(struct iwl_priv *priv,
897 struct iwl_rx_cmd_buffer *rxb,
898 struct iwl_device_cmd *cmd)
899 {
900 struct ieee80211_hdr *header;
901 struct ieee80211_rx_status rx_status = {};
902 struct iwl_rx_packet *pkt = rxb_addr(rxb);
903 struct iwl_rx_phy_res *phy_res;
904 __le32 rx_pkt_status;
905 struct iwl_rx_mpdu_res_start *amsdu;
906 u32 len;
907 u32 ampdu_status;
908 u32 rate_n_flags;
909
910 if (!priv->last_phy_res_valid) {
911 IWL_ERR(priv, "MPDU frame without cached PHY data\n");
912 return 0;
913 }
914 phy_res = &priv->last_phy_res;
915 amsdu = (struct iwl_rx_mpdu_res_start *)pkt->data;
916 header = (struct ieee80211_hdr *)(pkt->data + sizeof(*amsdu));
917 len = le16_to_cpu(amsdu->byte_count);
918 rx_pkt_status = *(__le32 *)(pkt->data + sizeof(*amsdu) + len);
919 ampdu_status = iwlagn_translate_rx_status(priv,
920 le32_to_cpu(rx_pkt_status));
921
922 if ((unlikely(phy_res->cfg_phy_cnt > 20))) {
923 IWL_DEBUG_DROP(priv, "dsp size out of range [0,20]: %d\n",
924 phy_res->cfg_phy_cnt);
925 return 0;
926 }
927
928 if (!(rx_pkt_status & RX_RES_STATUS_NO_CRC32_ERROR) ||
929 !(rx_pkt_status & RX_RES_STATUS_NO_RXE_OVERFLOW)) {
930 IWL_DEBUG_RX(priv, "Bad CRC or FIFO: 0x%08X.\n",
931 le32_to_cpu(rx_pkt_status));
932 return 0;
933 }
934
935 /* This will be used in several places later */
936 rate_n_flags = le32_to_cpu(phy_res->rate_n_flags);
937
938 /* rx_status carries information about the packet to mac80211 */
939 rx_status.mactime = le64_to_cpu(phy_res->timestamp);
940 rx_status.band = (phy_res->phy_flags & RX_RES_PHY_FLAGS_BAND_24_MSK) ?
941 IEEE80211_BAND_2GHZ : IEEE80211_BAND_5GHZ;
942 rx_status.freq =
943 ieee80211_channel_to_frequency(le16_to_cpu(phy_res->channel),
944 rx_status.band);
945 rx_status.rate_idx =
946 iwlagn_hwrate_to_mac80211_idx(rate_n_flags, rx_status.band);
947 rx_status.flag = 0;
948
949 /* TSF isn't reliable. In order to allow smooth user experience,
950 * this W/A doesn't propagate it to the mac80211 */
951 /*rx_status.flag |= RX_FLAG_MACTIME_START;*/
952
953 priv->ucode_beacon_time = le32_to_cpu(phy_res->beacon_time_stamp);
954
955 /* Find max signal strength (dBm) among 3 antenna/receiver chains */
956 rx_status.signal = iwlagn_calc_rssi(priv, phy_res);
957
958 IWL_DEBUG_STATS_LIMIT(priv, "Rssi %d, TSF %llu\n",
959 rx_status.signal, (unsigned long long)rx_status.mactime);
960
961 /*
962 * "antenna number"
963 *
964 * It seems that the antenna field in the phy flags value
965 * is actually a bit field. This is undefined by radiotap,
966 * it wants an actual antenna number but I always get "7"
967 * for most legacy frames I receive indicating that the
968 * same frame was received on all three RX chains.
969 *
970 * I think this field should be removed in favor of a
971 * new 802.11n radiotap field "RX chains" that is defined
972 * as a bitmask.
973 */
974 rx_status.antenna =
975 (le16_to_cpu(phy_res->phy_flags) & RX_RES_PHY_FLAGS_ANTENNA_MSK)
976 >> RX_RES_PHY_FLAGS_ANTENNA_POS;
977
978 /* set the preamble flag if appropriate */
979 if (phy_res->phy_flags & RX_RES_PHY_FLAGS_SHORT_PREAMBLE_MSK)
980 rx_status.flag |= RX_FLAG_SHORTPRE;
981
982 if (phy_res->phy_flags & RX_RES_PHY_FLAGS_AGG_MSK) {
983 /*
984 * We know which subframes of an A-MPDU belong
985 * together since we get a single PHY response
986 * from the firmware for all of them
987 */
988 rx_status.flag |= RX_FLAG_AMPDU_DETAILS;
989 rx_status.ampdu_reference = priv->ampdu_ref;
990 }
991
992 /* Set up the HT phy flags */
993 if (rate_n_flags & RATE_MCS_HT_MSK)
994 rx_status.flag |= RX_FLAG_HT;
995 if (rate_n_flags & RATE_MCS_HT40_MSK)
996 rx_status.flag |= RX_FLAG_40MHZ;
997 if (rate_n_flags & RATE_MCS_SGI_MSK)
998 rx_status.flag |= RX_FLAG_SHORT_GI;
999 if (rate_n_flags & RATE_MCS_GF_MSK)
1000 rx_status.flag |= RX_FLAG_HT_GF;
1001
1002 iwlagn_pass_packet_to_mac80211(priv, header, len, ampdu_status,
1003 rxb, &rx_status);
1004 return 0;
1005 }
1006
1007 static int iwlagn_rx_noa_notification(struct iwl_priv *priv,
1008 struct iwl_rx_cmd_buffer *rxb,
1009 struct iwl_device_cmd *cmd)
1010 {
1011 struct iwl_wipan_noa_data *new_data, *old_data;
1012 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1013 struct iwl_wipan_noa_notification *noa_notif = (void *)pkt->data;
1014
1015 /* no condition -- we're in softirq */
1016 old_data = rcu_dereference_protected(priv->noa_data, true);
1017
1018 if (noa_notif->noa_active) {
1019 u32 len = le16_to_cpu(noa_notif->noa_attribute.length);
1020 u32 copylen = len;
1021
1022 /* EID, len, OUI, subtype */
1023 len += 1 + 1 + 3 + 1;
1024 /* P2P id, P2P length */
1025 len += 1 + 2;
1026 copylen += 1 + 2;
1027
1028 new_data = kmalloc(sizeof(*new_data) + len, GFP_ATOMIC);
1029 if (new_data) {
1030 new_data->length = len;
1031 new_data->data[0] = WLAN_EID_VENDOR_SPECIFIC;
1032 new_data->data[1] = len - 2; /* not counting EID, len */
1033 new_data->data[2] = (WLAN_OUI_WFA >> 16) & 0xff;
1034 new_data->data[3] = (WLAN_OUI_WFA >> 8) & 0xff;
1035 new_data->data[4] = (WLAN_OUI_WFA >> 0) & 0xff;
1036 new_data->data[5] = WLAN_OUI_TYPE_WFA_P2P;
1037 memcpy(&new_data->data[6], &noa_notif->noa_attribute,
1038 copylen);
1039 }
1040 } else
1041 new_data = NULL;
1042
1043 rcu_assign_pointer(priv->noa_data, new_data);
1044
1045 if (old_data)
1046 kfree_rcu(old_data, rcu_head);
1047
1048 return 0;
1049 }
1050
1051 /**
1052 * iwl_setup_rx_handlers - Initialize Rx handler callbacks
1053 *
1054 * Setup the RX handlers for each of the reply types sent from the uCode
1055 * to the host.
1056 */
1057 void iwl_setup_rx_handlers(struct iwl_priv *priv)
1058 {
1059 int (**handlers)(struct iwl_priv *priv, struct iwl_rx_cmd_buffer *rxb,
1060 struct iwl_device_cmd *cmd);
1061
1062 handlers = priv->rx_handlers;
1063
1064 handlers[REPLY_ERROR] = iwlagn_rx_reply_error;
1065 handlers[CHANNEL_SWITCH_NOTIFICATION] = iwlagn_rx_csa;
1066 handlers[SPECTRUM_MEASURE_NOTIFICATION] =
1067 iwlagn_rx_spectrum_measure_notif;
1068 handlers[PM_SLEEP_NOTIFICATION] = iwlagn_rx_pm_sleep_notif;
1069 handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
1070 iwlagn_rx_pm_debug_statistics_notif;
1071 handlers[BEACON_NOTIFICATION] = iwlagn_rx_beacon_notif;
1072 handlers[REPLY_ADD_STA] = iwl_add_sta_callback;
1073
1074 handlers[REPLY_WIPAN_NOA_NOTIFICATION] = iwlagn_rx_noa_notification;
1075
1076 /*
1077 * The same handler is used for both the REPLY to a discrete
1078 * statistics request from the host as well as for the periodic
1079 * statistics notifications (after received beacons) from the uCode.
1080 */
1081 handlers[REPLY_STATISTICS_CMD] = iwlagn_rx_reply_statistics;
1082 handlers[STATISTICS_NOTIFICATION] = iwlagn_rx_statistics;
1083
1084 iwl_setup_rx_scan_handlers(priv);
1085
1086 handlers[CARD_STATE_NOTIFICATION] = iwlagn_rx_card_state_notif;
1087 handlers[MISSED_BEACONS_NOTIFICATION] =
1088 iwlagn_rx_missed_beacon_notif;
1089
1090 /* Rx handlers */
1091 handlers[REPLY_RX_PHY_CMD] = iwlagn_rx_reply_rx_phy;
1092 handlers[REPLY_RX_MPDU_CMD] = iwlagn_rx_reply_rx;
1093
1094 /* block ack */
1095 handlers[REPLY_COMPRESSED_BA] =
1096 iwlagn_rx_reply_compressed_ba;
1097
1098 priv->rx_handlers[REPLY_TX] = iwlagn_rx_reply_tx;
1099
1100 /* set up notification wait support */
1101 iwl_notification_wait_init(&priv->notif_wait);
1102
1103 /* Set up BT Rx handlers */
1104 if (priv->lib->bt_params)
1105 iwlagn_bt_rx_handler_setup(priv);
1106 }
1107
1108 int iwl_rx_dispatch(struct iwl_op_mode *op_mode, struct iwl_rx_cmd_buffer *rxb,
1109 struct iwl_device_cmd *cmd)
1110 {
1111 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1112 struct iwl_priv *priv = IWL_OP_MODE_GET_DVM(op_mode);
1113 int err = 0;
1114
1115 /*
1116 * Do the notification wait before RX handlers so
1117 * even if the RX handler consumes the RXB we have
1118 * access to it in the notification wait entry.
1119 */
1120 iwl_notification_wait_notify(&priv->notif_wait, pkt);
1121
1122 /* Based on type of command response or notification,
1123 * handle those that need handling via function in
1124 * rx_handlers table. See iwl_setup_rx_handlers() */
1125 if (priv->rx_handlers[pkt->hdr.cmd]) {
1126 priv->rx_handlers_stats[pkt->hdr.cmd]++;
1127 err = priv->rx_handlers[pkt->hdr.cmd] (priv, rxb, cmd);
1128 } else {
1129 /* No handling needed */
1130 IWL_DEBUG_RX(priv, "No handler needed for %s, 0x%02x\n",
1131 iwl_dvm_get_cmd_string(pkt->hdr.cmd),
1132 pkt->hdr.cmd);
1133 }
1134 return err;
1135 }
Linux with added FPC-III support