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iwlwifi: don't pass iwl_rx_mem_buffer to upper layers
[deliverable/linux.git] / drivers / net / wireless / iwlwifi / iwl-agn-rx.c
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
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
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
139 IWL_ERR(priv, "Error Reply type 0x%08X cmd %s (0x%02X) "
140 "seq 0x%04X ser 0x%08X\n",
141 le32_to_cpu(pkt->u.err_resp.error_type),
142 get_cmd_string(pkt->u.err_resp.cmd_id),
143 pkt->u.err_resp.cmd_id,
144 le16_to_cpu(pkt->u.err_resp.bad_cmd_seq_num),
145 le32_to_cpu(pkt->u.err_resp.error_info));
146 return 0;
147 }
148
149 static int iwlagn_rx_csa(struct iwl_priv *priv, struct iwl_rx_cmd_buffer *rxb,
150 struct iwl_device_cmd *cmd)
151 {
152 struct iwl_rx_packet *pkt = rxb_addr(rxb);
153 struct iwl_csa_notification *csa = &(pkt->u.csa_notif);
154 /*
155 * MULTI-FIXME
156 * See iwlagn_mac_channel_switch.
157 */
158 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
159 struct iwl_rxon_cmd *rxon = (void *)&ctx->active;
160
161 if (!test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->shrd->status))
162 return 0;
163
164 if (!le32_to_cpu(csa->status) && csa->channel == priv->switch_channel) {
165 rxon->channel = csa->channel;
166 ctx->staging.channel = csa->channel;
167 IWL_DEBUG_11H(priv, "CSA notif: channel %d\n",
168 le16_to_cpu(csa->channel));
169 iwl_chswitch_done(priv, true);
170 } else {
171 IWL_ERR(priv, "CSA notif (fail) : channel %d\n",
172 le16_to_cpu(csa->channel));
173 iwl_chswitch_done(priv, false);
174 }
175 return 0;
176 }
177
178
179 static int iwlagn_rx_spectrum_measure_notif(struct iwl_priv *priv,
180 struct iwl_rx_cmd_buffer *rxb,
181 struct iwl_device_cmd *cmd)
182 {
183 struct iwl_rx_packet *pkt = rxb_addr(rxb);
184 struct iwl_spectrum_notification *report = &(pkt->u.spectrum_notif);
185
186 if (!report->state) {
187 IWL_DEBUG_11H(priv,
188 "Spectrum Measure Notification: Start\n");
189 return 0;
190 }
191
192 memcpy(&priv->measure_report, report, sizeof(*report));
193 priv->measurement_status |= MEASUREMENT_READY;
194 return 0;
195 }
196
197 static int iwlagn_rx_pm_sleep_notif(struct iwl_priv *priv,
198 struct iwl_rx_cmd_buffer *rxb,
199 struct iwl_device_cmd *cmd)
200 {
201 #ifdef CONFIG_IWLWIFI_DEBUG
202 struct iwl_rx_packet *pkt = rxb_addr(rxb);
203 struct iwl_sleep_notification *sleep = &(pkt->u.sleep_notif);
204 IWL_DEBUG_RX(priv, "sleep mode: %d, src: %d\n",
205 sleep->pm_sleep_mode, sleep->pm_wakeup_src);
206 #endif
207 return 0;
208 }
209
210 static int iwlagn_rx_pm_debug_statistics_notif(struct iwl_priv *priv,
211 struct iwl_rx_cmd_buffer *rxb,
212 struct iwl_device_cmd *cmd)
213 {
214 struct iwl_rx_packet *pkt = rxb_addr(rxb);
215 u32 __maybe_unused len =
216 le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK;
217 IWL_DEBUG_RADIO(priv, "Dumping %d bytes of unhandled "
218 "notification for %s:\n", len,
219 get_cmd_string(pkt->hdr.cmd));
220 iwl_print_hex_dump(priv, IWL_DL_RADIO, pkt->u.raw, len);
221 return 0;
222 }
223
224 static int iwlagn_rx_beacon_notif(struct iwl_priv *priv,
225 struct iwl_rx_cmd_buffer *rxb,
226 struct iwl_device_cmd *cmd)
227 {
228 struct iwl_rx_packet *pkt = rxb_addr(rxb);
229 struct iwlagn_beacon_notif *beacon = (void *)pkt->u.raw;
230 #ifdef CONFIG_IWLWIFI_DEBUG
231 u16 status = le16_to_cpu(beacon->beacon_notify_hdr.status.status);
232 u8 rate = iwl_hw_get_rate(beacon->beacon_notify_hdr.rate_n_flags);
233
234 IWL_DEBUG_RX(priv, "beacon status %#x, retries:%d ibssmgr:%d "
235 "tsf:0x%.8x%.8x rate:%d\n",
236 status & TX_STATUS_MSK,
237 beacon->beacon_notify_hdr.failure_frame,
238 le32_to_cpu(beacon->ibss_mgr_status),
239 le32_to_cpu(beacon->high_tsf),
240 le32_to_cpu(beacon->low_tsf), rate);
241 #endif
242
243 priv->ibss_manager = le32_to_cpu(beacon->ibss_mgr_status);
244
245 return 0;
246 }
247
248 /* the threshold ratio of actual_ack_cnt to expected_ack_cnt in percent */
249 #define ACK_CNT_RATIO (50)
250 #define BA_TIMEOUT_CNT (5)
251 #define BA_TIMEOUT_MAX (16)
252
253 /**
254 * iwl_good_ack_health - checks for ACK count ratios, BA timeout retries.
255 *
256 * When the ACK count ratio is low and aggregated BA timeout retries exceeding
257 * the BA_TIMEOUT_MAX, reload firmware and bring system back to normal
258 * operation state.
259 */
260 static bool iwlagn_good_ack_health(struct iwl_priv *priv,
261 struct statistics_tx *cur)
262 {
263 int actual_delta, expected_delta, ba_timeout_delta;
264 struct statistics_tx *old;
265
266 if (priv->agg_tids_count)
267 return true;
268
269 lockdep_assert_held(&priv->statistics.lock);
270
271 old = &priv->statistics.tx;
272
273 actual_delta = le32_to_cpu(cur->actual_ack_cnt) -
274 le32_to_cpu(old->actual_ack_cnt);
275 expected_delta = le32_to_cpu(cur->expected_ack_cnt) -
276 le32_to_cpu(old->expected_ack_cnt);
277
278 /* Values should not be negative, but we do not trust the firmware */
279 if (actual_delta <= 0 || expected_delta <= 0)
280 return true;
281
282 ba_timeout_delta = le32_to_cpu(cur->agg.ba_timeout) -
283 le32_to_cpu(old->agg.ba_timeout);
284
285 if ((actual_delta * 100 / expected_delta) < ACK_CNT_RATIO &&
286 ba_timeout_delta > BA_TIMEOUT_CNT) {
287 IWL_DEBUG_RADIO(priv,
288 "deltas: actual %d expected %d ba_timeout %d\n",
289 actual_delta, expected_delta, ba_timeout_delta);
290
291 #ifdef CONFIG_IWLWIFI_DEBUGFS
292 /*
293 * This is ifdef'ed on DEBUGFS because otherwise the
294 * statistics aren't available. If DEBUGFS is set but
295 * DEBUG is not, these will just compile out.
296 */
297 IWL_DEBUG_RADIO(priv, "rx_detected_cnt delta %d\n",
298 priv->delta_stats.tx.rx_detected_cnt);
299 IWL_DEBUG_RADIO(priv,
300 "ack_or_ba_timeout_collision delta %d\n",
301 priv->delta_stats.tx.ack_or_ba_timeout_collision);
302 #endif
303
304 if (ba_timeout_delta >= BA_TIMEOUT_MAX)
305 return false;
306 }
307
308 return true;
309 }
310
311 /**
312 * iwl_good_plcp_health - checks for plcp error.
313 *
314 * When the plcp error is exceeding the thresholds, reset the radio
315 * to improve the throughput.
316 */
317 static bool iwlagn_good_plcp_health(struct iwl_priv *priv,
318 struct statistics_rx_phy *cur_ofdm,
319 struct statistics_rx_ht_phy *cur_ofdm_ht,
320 unsigned int msecs)
321 {
322 int delta;
323 int threshold = cfg(priv)->base_params->plcp_delta_threshold;
324
325 if (threshold == IWL_MAX_PLCP_ERR_THRESHOLD_DISABLE) {
326 IWL_DEBUG_RADIO(priv, "plcp_err check disabled\n");
327 return true;
328 }
329
330 delta = le32_to_cpu(cur_ofdm->plcp_err) -
331 le32_to_cpu(priv->statistics.rx_ofdm.plcp_err) +
332 le32_to_cpu(cur_ofdm_ht->plcp_err) -
333 le32_to_cpu(priv->statistics.rx_ofdm_ht.plcp_err);
334
335 /* Can be negative if firmware reset statistics */
336 if (delta <= 0)
337 return true;
338
339 if ((delta * 100 / msecs) > threshold) {
340 IWL_DEBUG_RADIO(priv,
341 "plcp health threshold %u delta %d msecs %u\n",
342 threshold, delta, msecs);
343 return false;
344 }
345
346 return true;
347 }
348
349 static void iwlagn_recover_from_statistics(struct iwl_priv *priv,
350 struct statistics_rx_phy *cur_ofdm,
351 struct statistics_rx_ht_phy *cur_ofdm_ht,
352 struct statistics_tx *tx,
353 unsigned long stamp)
354 {
355 unsigned int msecs;
356
357 if (test_bit(STATUS_EXIT_PENDING, &priv->shrd->status))
358 return;
359
360 msecs = jiffies_to_msecs(stamp - priv->rx_statistics_jiffies);
361
362 /* Only gather statistics and update time stamp when not associated */
363 if (!iwl_is_any_associated(priv))
364 return;
365
366 /* Do not check/recover when do not have enough statistics data */
367 if (msecs < 99)
368 return;
369
370 if (iwlagn_mod_params.ack_check && !iwlagn_good_ack_health(priv, tx)) {
371 IWL_ERR(priv, "low ack count detected, restart firmware\n");
372 if (!iwl_force_reset(priv, IWL_FW_RESET, false))
373 return;
374 }
375
376 if (iwlagn_mod_params.plcp_check &&
377 !iwlagn_good_plcp_health(priv, cur_ofdm, cur_ofdm_ht, msecs))
378 iwl_force_reset(priv, IWL_RF_RESET, false);
379 }
380
381 /* Calculate noise level, based on measurements during network silence just
382 * before arriving beacon. This measurement can be done only if we know
383 * exactly when to expect beacons, therefore only when we're associated. */
384 static void iwlagn_rx_calc_noise(struct iwl_priv *priv)
385 {
386 struct statistics_rx_non_phy *rx_info;
387 int num_active_rx = 0;
388 int total_silence = 0;
389 int bcn_silence_a, bcn_silence_b, bcn_silence_c;
390 int last_rx_noise;
391
392 rx_info = &priv->statistics.rx_non_phy;
393
394 bcn_silence_a =
395 le32_to_cpu(rx_info->beacon_silence_rssi_a) & IN_BAND_FILTER;
396 bcn_silence_b =
397 le32_to_cpu(rx_info->beacon_silence_rssi_b) & IN_BAND_FILTER;
398 bcn_silence_c =
399 le32_to_cpu(rx_info->beacon_silence_rssi_c) & IN_BAND_FILTER;
400
401 if (bcn_silence_a) {
402 total_silence += bcn_silence_a;
403 num_active_rx++;
404 }
405 if (bcn_silence_b) {
406 total_silence += bcn_silence_b;
407 num_active_rx++;
408 }
409 if (bcn_silence_c) {
410 total_silence += bcn_silence_c;
411 num_active_rx++;
412 }
413
414 /* Average among active antennas */
415 if (num_active_rx)
416 last_rx_noise = (total_silence / num_active_rx) - 107;
417 else
418 last_rx_noise = IWL_NOISE_MEAS_NOT_AVAILABLE;
419
420 IWL_DEBUG_CALIB(priv, "inband silence a %u, b %u, c %u, dBm %d\n",
421 bcn_silence_a, bcn_silence_b, bcn_silence_c,
422 last_rx_noise);
423 }
424
425 #ifdef CONFIG_IWLWIFI_DEBUGFS
426 /*
427 * based on the assumption of all statistics counter are in DWORD
428 * FIXME: This function is for debugging, do not deal with
429 * the case of counters roll-over.
430 */
431 static void accum_stats(__le32 *prev, __le32 *cur, __le32 *delta,
432 __le32 *max_delta, __le32 *accum, int size)
433 {
434 int i;
435
436 for (i = 0;
437 i < size / sizeof(__le32);
438 i++, prev++, cur++, delta++, max_delta++, accum++) {
439 if (le32_to_cpu(*cur) > le32_to_cpu(*prev)) {
440 *delta = cpu_to_le32(
441 le32_to_cpu(*cur) - le32_to_cpu(*prev));
442 le32_add_cpu(accum, le32_to_cpu(*delta));
443 if (le32_to_cpu(*delta) > le32_to_cpu(*max_delta))
444 *max_delta = *delta;
445 }
446 }
447 }
448
449 static void
450 iwlagn_accumulative_statistics(struct iwl_priv *priv,
451 struct statistics_general_common *common,
452 struct statistics_rx_non_phy *rx_non_phy,
453 struct statistics_rx_phy *rx_ofdm,
454 struct statistics_rx_ht_phy *rx_ofdm_ht,
455 struct statistics_rx_phy *rx_cck,
456 struct statistics_tx *tx,
457 struct statistics_bt_activity *bt_activity)
458 {
459 #define ACCUM(_name) \
460 accum_stats((__le32 *)&priv->statistics._name, \
461 (__le32 *)_name, \
462 (__le32 *)&priv->delta_stats._name, \
463 (__le32 *)&priv->max_delta_stats._name, \
464 (__le32 *)&priv->accum_stats._name, \
465 sizeof(*_name));
466
467 ACCUM(common);
468 ACCUM(rx_non_phy);
469 ACCUM(rx_ofdm);
470 ACCUM(rx_ofdm_ht);
471 ACCUM(rx_cck);
472 ACCUM(tx);
473 if (bt_activity)
474 ACCUM(bt_activity);
475 #undef ACCUM
476 }
477 #else
478 static inline void
479 iwlagn_accumulative_statistics(struct iwl_priv *priv,
480 struct statistics_general_common *common,
481 struct statistics_rx_non_phy *rx_non_phy,
482 struct statistics_rx_phy *rx_ofdm,
483 struct statistics_rx_ht_phy *rx_ofdm_ht,
484 struct statistics_rx_phy *rx_cck,
485 struct statistics_tx *tx,
486 struct statistics_bt_activity *bt_activity)
487 {
488 }
489 #endif
490
491 static int iwlagn_rx_statistics(struct iwl_priv *priv,
492 struct iwl_rx_cmd_buffer *rxb,
493 struct iwl_device_cmd *cmd)
494 {
495 unsigned long stamp = jiffies;
496 const int reg_recalib_period = 60;
497 int change;
498 struct iwl_rx_packet *pkt = rxb_addr(rxb);
499 u32 len = le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK;
500 __le32 *flag;
501 struct statistics_general_common *common;
502 struct statistics_rx_non_phy *rx_non_phy;
503 struct statistics_rx_phy *rx_ofdm;
504 struct statistics_rx_ht_phy *rx_ofdm_ht;
505 struct statistics_rx_phy *rx_cck;
506 struct statistics_tx *tx;
507 struct statistics_bt_activity *bt_activity;
508
509 len -= sizeof(struct iwl_cmd_header); /* skip header */
510
511 IWL_DEBUG_RX(priv, "Statistics notification received (%d bytes).\n",
512 len);
513
514 spin_lock(&priv->statistics.lock);
515
516 if (len == sizeof(struct iwl_bt_notif_statistics)) {
517 struct iwl_bt_notif_statistics *stats;
518 stats = &pkt->u.stats_bt;
519 flag = &stats->flag;
520 common = &stats->general.common;
521 rx_non_phy = &stats->rx.general.common;
522 rx_ofdm = &stats->rx.ofdm;
523 rx_ofdm_ht = &stats->rx.ofdm_ht;
524 rx_cck = &stats->rx.cck;
525 tx = &stats->tx;
526 bt_activity = &stats->general.activity;
527
528 #ifdef CONFIG_IWLWIFI_DEBUGFS
529 /* handle this exception directly */
530 priv->statistics.num_bt_kills = stats->rx.general.num_bt_kills;
531 le32_add_cpu(&priv->statistics.accum_num_bt_kills,
532 le32_to_cpu(stats->rx.general.num_bt_kills));
533 #endif
534 } else if (len == sizeof(struct iwl_notif_statistics)) {
535 struct iwl_notif_statistics *stats;
536 stats = &pkt->u.stats;
537 flag = &stats->flag;
538 common = &stats->general.common;
539 rx_non_phy = &stats->rx.general;
540 rx_ofdm = &stats->rx.ofdm;
541 rx_ofdm_ht = &stats->rx.ofdm_ht;
542 rx_cck = &stats->rx.cck;
543 tx = &stats->tx;
544 bt_activity = NULL;
545 } else {
546 WARN_ONCE(1, "len %d doesn't match BT (%zu) or normal (%zu)\n",
547 len, sizeof(struct iwl_bt_notif_statistics),
548 sizeof(struct iwl_notif_statistics));
549 spin_unlock(&priv->statistics.lock);
550 return 0;
551 }
552
553 change = common->temperature != priv->statistics.common.temperature ||
554 (*flag & STATISTICS_REPLY_FLG_HT40_MODE_MSK) !=
555 (priv->statistics.flag & STATISTICS_REPLY_FLG_HT40_MODE_MSK);
556
557 iwlagn_accumulative_statistics(priv, common, rx_non_phy, rx_ofdm,
558 rx_ofdm_ht, rx_cck, tx, bt_activity);
559
560 iwlagn_recover_from_statistics(priv, rx_ofdm, rx_ofdm_ht, tx, stamp);
561
562 priv->statistics.flag = *flag;
563 memcpy(&priv->statistics.common, common, sizeof(*common));
564 memcpy(&priv->statistics.rx_non_phy, rx_non_phy, sizeof(*rx_non_phy));
565 memcpy(&priv->statistics.rx_ofdm, rx_ofdm, sizeof(*rx_ofdm));
566 memcpy(&priv->statistics.rx_ofdm_ht, rx_ofdm_ht, sizeof(*rx_ofdm_ht));
567 memcpy(&priv->statistics.rx_cck, rx_cck, sizeof(*rx_cck));
568 memcpy(&priv->statistics.tx, tx, sizeof(*tx));
569 #ifdef CONFIG_IWLWIFI_DEBUGFS
570 if (bt_activity)
571 memcpy(&priv->statistics.bt_activity, bt_activity,
572 sizeof(*bt_activity));
573 #endif
574
575 priv->rx_statistics_jiffies = stamp;
576
577 set_bit(STATUS_STATISTICS, &priv->shrd->status);
578
579 /* Reschedule the statistics timer to occur in
580 * reg_recalib_period seconds to ensure we get a
581 * thermal update even if the uCode doesn't give
582 * us one */
583 mod_timer(&priv->statistics_periodic, jiffies +
584 msecs_to_jiffies(reg_recalib_period * 1000));
585
586 if (unlikely(!test_bit(STATUS_SCANNING, &priv->shrd->status)) &&
587 (pkt->hdr.cmd == STATISTICS_NOTIFICATION)) {
588 iwlagn_rx_calc_noise(priv);
589 queue_work(priv->workqueue, &priv->run_time_calib_work);
590 }
591 if (cfg(priv)->lib->temperature && change)
592 cfg(priv)->lib->temperature(priv);
593
594 spin_unlock(&priv->statistics.lock);
595
596 return 0;
597 }
598
599 static int iwlagn_rx_reply_statistics(struct iwl_priv *priv,
600 struct iwl_rx_cmd_buffer *rxb,
601 struct iwl_device_cmd *cmd)
602 {
603 struct iwl_rx_packet *pkt = rxb_addr(rxb);
604
605 if (le32_to_cpu(pkt->u.stats.flag) & UCODE_STATISTICS_CLEAR_MSK) {
606 #ifdef CONFIG_IWLWIFI_DEBUGFS
607 memset(&priv->accum_stats, 0,
608 sizeof(priv->accum_stats));
609 memset(&priv->delta_stats, 0,
610 sizeof(priv->delta_stats));
611 memset(&priv->max_delta_stats, 0,
612 sizeof(priv->max_delta_stats));
613 #endif
614 IWL_DEBUG_RX(priv, "Statistics have been cleared\n");
615 }
616 iwlagn_rx_statistics(priv, rxb, cmd);
617 return 0;
618 }
619
620 /* Handle notification from uCode that card's power state is changing
621 * due to software, hardware, or critical temperature RFKILL */
622 static int iwlagn_rx_card_state_notif(struct iwl_priv *priv,
623 struct iwl_rx_cmd_buffer *rxb,
624 struct iwl_device_cmd *cmd)
625 {
626 struct iwl_rx_packet *pkt = rxb_addr(rxb);
627 u32 flags = le32_to_cpu(pkt->u.card_state_notif.flags);
628 unsigned long status = priv->shrd->status;
629
630 IWL_DEBUG_RF_KILL(priv, "Card state received: HW:%s SW:%s CT:%s\n",
631 (flags & HW_CARD_DISABLED) ? "Kill" : "On",
632 (flags & SW_CARD_DISABLED) ? "Kill" : "On",
633 (flags & CT_CARD_DISABLED) ?
634 "Reached" : "Not reached");
635
636 if (flags & (SW_CARD_DISABLED | HW_CARD_DISABLED |
637 CT_CARD_DISABLED)) {
638
639 iwl_write32(trans(priv), CSR_UCODE_DRV_GP1_SET,
640 CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
641
642 iwl_write_direct32(trans(priv), HBUS_TARG_MBX_C,
643 HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
644
645 if (!(flags & RXON_CARD_DISABLED)) {
646 iwl_write32(trans(priv), CSR_UCODE_DRV_GP1_CLR,
647 CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
648 iwl_write_direct32(trans(priv), HBUS_TARG_MBX_C,
649 HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
650 }
651 if (flags & CT_CARD_DISABLED)
652 iwl_tt_enter_ct_kill(priv);
653 }
654 if (!(flags & CT_CARD_DISABLED))
655 iwl_tt_exit_ct_kill(priv);
656
657 if (flags & HW_CARD_DISABLED)
658 set_bit(STATUS_RF_KILL_HW, &priv->shrd->status);
659 else
660 clear_bit(STATUS_RF_KILL_HW, &priv->shrd->status);
661
662
663 if (!(flags & RXON_CARD_DISABLED))
664 iwl_scan_cancel(priv);
665
666 if ((test_bit(STATUS_RF_KILL_HW, &status) !=
667 test_bit(STATUS_RF_KILL_HW, &priv->shrd->status)))
668 wiphy_rfkill_set_hw_state(priv->hw->wiphy,
669 test_bit(STATUS_RF_KILL_HW, &priv->shrd->status));
670 else
671 wake_up(&priv->shrd->wait_command_queue);
672 return 0;
673 }
674
675 static int iwlagn_rx_missed_beacon_notif(struct iwl_priv *priv,
676 struct iwl_rx_cmd_buffer *rxb,
677 struct iwl_device_cmd *cmd)
678
679 {
680 struct iwl_rx_packet *pkt = rxb_addr(rxb);
681 struct iwl_missed_beacon_notif *missed_beacon;
682
683 missed_beacon = &pkt->u.missed_beacon;
684 if (le32_to_cpu(missed_beacon->consecutive_missed_beacons) >
685 priv->missed_beacon_threshold) {
686 IWL_DEBUG_CALIB(priv,
687 "missed bcn cnsq %d totl %d rcd %d expctd %d\n",
688 le32_to_cpu(missed_beacon->consecutive_missed_beacons),
689 le32_to_cpu(missed_beacon->total_missed_becons),
690 le32_to_cpu(missed_beacon->num_recvd_beacons),
691 le32_to_cpu(missed_beacon->num_expected_beacons));
692 if (!test_bit(STATUS_SCANNING, &priv->shrd->status))
693 iwl_init_sensitivity(priv);
694 }
695 return 0;
696 }
697
698 /* Cache phy data (Rx signal strength, etc) for HT frame (REPLY_RX_PHY_CMD).
699 * This will be used later in iwl_rx_reply_rx() for REPLY_RX_MPDU_CMD. */
700 static int iwlagn_rx_reply_rx_phy(struct iwl_priv *priv,
701 struct iwl_rx_cmd_buffer *rxb,
702 struct iwl_device_cmd *cmd)
703 {
704 struct iwl_rx_packet *pkt = rxb_addr(rxb);
705
706 priv->last_phy_res_valid = true;
707 memcpy(&priv->last_phy_res, pkt->u.raw,
708 sizeof(struct iwl_rx_phy_res));
709 return 0;
710 }
711
712 /*
713 * returns non-zero if packet should be dropped
714 */
715 static int iwlagn_set_decrypted_flag(struct iwl_priv *priv,
716 struct ieee80211_hdr *hdr,
717 u32 decrypt_res,
718 struct ieee80211_rx_status *stats)
719 {
720 u16 fc = le16_to_cpu(hdr->frame_control);
721
722 /*
723 * All contexts have the same setting here due to it being
724 * a module parameter, so OK to check any context.
725 */
726 if (priv->contexts[IWL_RXON_CTX_BSS].active.filter_flags &
727 RXON_FILTER_DIS_DECRYPT_MSK)
728 return 0;
729
730 if (!(fc & IEEE80211_FCTL_PROTECTED))
731 return 0;
732
733 IWL_DEBUG_RX(priv, "decrypt_res:0x%x\n", decrypt_res);
734 switch (decrypt_res & RX_RES_STATUS_SEC_TYPE_MSK) {
735 case RX_RES_STATUS_SEC_TYPE_TKIP:
736 /* The uCode has got a bad phase 1 Key, pushes the packet.
737 * Decryption will be done in SW. */
738 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
739 RX_RES_STATUS_BAD_KEY_TTAK)
740 break;
741
742 case RX_RES_STATUS_SEC_TYPE_WEP:
743 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
744 RX_RES_STATUS_BAD_ICV_MIC) {
745 /* bad ICV, the packet is destroyed since the
746 * decryption is inplace, drop it */
747 IWL_DEBUG_RX(priv, "Packet destroyed\n");
748 return -1;
749 }
750 case RX_RES_STATUS_SEC_TYPE_CCMP:
751 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
752 RX_RES_STATUS_DECRYPT_OK) {
753 IWL_DEBUG_RX(priv, "hw decrypt successfully!!!\n");
754 stats->flag |= RX_FLAG_DECRYPTED;
755 }
756 break;
757
758 default:
759 break;
760 }
761 return 0;
762 }
763
764 static void iwlagn_pass_packet_to_mac80211(struct iwl_priv *priv,
765 struct ieee80211_hdr *hdr,
766 u16 len,
767 u32 ampdu_status,
768 struct iwl_rx_cmd_buffer *rxb,
769 struct ieee80211_rx_status *stats)
770 {
771 struct sk_buff *skb;
772 __le16 fc = hdr->frame_control;
773 struct iwl_rxon_context *ctx;
774 struct page *p;
775 int offset;
776
777 /* We only process data packets if the interface is open */
778 if (unlikely(!priv->is_open)) {
779 IWL_DEBUG_DROP_LIMIT(priv,
780 "Dropping packet while interface is not open.\n");
781 return;
782 }
783
784 /* In case of HW accelerated crypto and bad decryption, drop */
785 if (!iwlagn_mod_params.sw_crypto &&
786 iwlagn_set_decrypted_flag(priv, hdr, ampdu_status, stats))
787 return;
788
789 skb = dev_alloc_skb(128);
790 if (!skb) {
791 IWL_ERR(priv, "dev_alloc_skb failed\n");
792 return;
793 }
794
795 offset = (void *)hdr - rxb_addr(rxb);
796 p = rxb_steal_page(rxb);
797 skb_add_rx_frag(skb, 0, p, offset, len);
798
799 iwl_update_stats(priv, false, fc, len);
800
801 /*
802 * Wake any queues that were stopped due to a passive channel tx
803 * failure. This can happen because the regulatory enforcement in
804 * the device waits for a beacon before allowing transmission,
805 * sometimes even after already having transmitted frames for the
806 * association because the new RXON may reset the information.
807 */
808 if (unlikely(ieee80211_is_beacon(fc))) {
809 for_each_context(priv, ctx) {
810 if (!ctx->last_tx_rejected)
811 continue;
812 if (compare_ether_addr(hdr->addr3,
813 ctx->active.bssid_addr))
814 continue;
815 ctx->last_tx_rejected = false;
816 iwl_trans_wake_any_queue(trans(priv), ctx->ctxid,
817 "channel got active");
818 }
819 }
820
821 memcpy(IEEE80211_SKB_RXCB(skb), stats, sizeof(*stats));
822
823 ieee80211_rx(priv->hw, skb);
824 }
825
826 static u32 iwlagn_translate_rx_status(struct iwl_priv *priv, u32 decrypt_in)
827 {
828 u32 decrypt_out = 0;
829
830 if ((decrypt_in & RX_RES_STATUS_STATION_FOUND) ==
831 RX_RES_STATUS_STATION_FOUND)
832 decrypt_out |= (RX_RES_STATUS_STATION_FOUND |
833 RX_RES_STATUS_NO_STATION_INFO_MISMATCH);
834
835 decrypt_out |= (decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK);
836
837 /* packet was not encrypted */
838 if ((decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) ==
839 RX_RES_STATUS_SEC_TYPE_NONE)
840 return decrypt_out;
841
842 /* packet was encrypted with unknown alg */
843 if ((decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) ==
844 RX_RES_STATUS_SEC_TYPE_ERR)
845 return decrypt_out;
846
847 /* decryption was not done in HW */
848 if ((decrypt_in & RX_MPDU_RES_STATUS_DEC_DONE_MSK) !=
849 RX_MPDU_RES_STATUS_DEC_DONE_MSK)
850 return decrypt_out;
851
852 switch (decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) {
853
854 case RX_RES_STATUS_SEC_TYPE_CCMP:
855 /* alg is CCM: check MIC only */
856 if (!(decrypt_in & RX_MPDU_RES_STATUS_MIC_OK))
857 /* Bad MIC */
858 decrypt_out |= RX_RES_STATUS_BAD_ICV_MIC;
859 else
860 decrypt_out |= RX_RES_STATUS_DECRYPT_OK;
861
862 break;
863
864 case RX_RES_STATUS_SEC_TYPE_TKIP:
865 if (!(decrypt_in & RX_MPDU_RES_STATUS_TTAK_OK)) {
866 /* Bad TTAK */
867 decrypt_out |= RX_RES_STATUS_BAD_KEY_TTAK;
868 break;
869 }
870 /* fall through if TTAK OK */
871 default:
872 if (!(decrypt_in & RX_MPDU_RES_STATUS_ICV_OK))
873 decrypt_out |= RX_RES_STATUS_BAD_ICV_MIC;
874 else
875 decrypt_out |= RX_RES_STATUS_DECRYPT_OK;
876 break;
877 }
878
879 IWL_DEBUG_RX(priv, "decrypt_in:0x%x decrypt_out = 0x%x\n",
880 decrypt_in, decrypt_out);
881
882 return decrypt_out;
883 }
884
885 /* Calc max signal level (dBm) among 3 possible receivers */
886 static int iwlagn_calc_rssi(struct iwl_priv *priv,
887 struct iwl_rx_phy_res *rx_resp)
888 {
889 /* data from PHY/DSP regarding signal strength, etc.,
890 * contents are always there, not configurable by host
891 */
892 struct iwlagn_non_cfg_phy *ncphy =
893 (struct iwlagn_non_cfg_phy *)rx_resp->non_cfg_phy_buf;
894 u32 val, rssi_a, rssi_b, rssi_c, max_rssi;
895 u8 agc;
896
897 val = le32_to_cpu(ncphy->non_cfg_phy[IWLAGN_RX_RES_AGC_IDX]);
898 agc = (val & IWLAGN_OFDM_AGC_MSK) >> IWLAGN_OFDM_AGC_BIT_POS;
899
900 /* Find max rssi among 3 possible receivers.
901 * These values are measured by the digital signal processor (DSP).
902 * They should stay fairly constant even as the signal strength varies,
903 * if the radio's automatic gain control (AGC) is working right.
904 * AGC value (see below) will provide the "interesting" info.
905 */
906 val = le32_to_cpu(ncphy->non_cfg_phy[IWLAGN_RX_RES_RSSI_AB_IDX]);
907 rssi_a = (val & IWLAGN_OFDM_RSSI_INBAND_A_BITMSK) >>
908 IWLAGN_OFDM_RSSI_A_BIT_POS;
909 rssi_b = (val & IWLAGN_OFDM_RSSI_INBAND_B_BITMSK) >>
910 IWLAGN_OFDM_RSSI_B_BIT_POS;
911 val = le32_to_cpu(ncphy->non_cfg_phy[IWLAGN_RX_RES_RSSI_C_IDX]);
912 rssi_c = (val & IWLAGN_OFDM_RSSI_INBAND_C_BITMSK) >>
913 IWLAGN_OFDM_RSSI_C_BIT_POS;
914
915 max_rssi = max_t(u32, rssi_a, rssi_b);
916 max_rssi = max_t(u32, max_rssi, rssi_c);
917
918 IWL_DEBUG_STATS(priv, "Rssi In A %d B %d C %d Max %d AGC dB %d\n",
919 rssi_a, rssi_b, rssi_c, max_rssi, agc);
920
921 /* dBm = max_rssi dB - agc dB - constant.
922 * Higher AGC (higher radio gain) means lower signal. */
923 return max_rssi - agc - IWLAGN_RSSI_OFFSET;
924 }
925
926 /* Called for REPLY_RX (legacy ABG frames), or
927 * REPLY_RX_MPDU_CMD (HT high-throughput N frames). */
928 static int iwlagn_rx_reply_rx(struct iwl_priv *priv,
929 struct iwl_rx_cmd_buffer *rxb,
930 struct iwl_device_cmd *cmd)
931 {
932 struct ieee80211_hdr *header;
933 struct ieee80211_rx_status rx_status;
934 struct iwl_rx_packet *pkt = rxb_addr(rxb);
935 struct iwl_rx_phy_res *phy_res;
936 __le32 rx_pkt_status;
937 struct iwl_rx_mpdu_res_start *amsdu;
938 u32 len;
939 u32 ampdu_status;
940 u32 rate_n_flags;
941
942 /**
943 * REPLY_RX and REPLY_RX_MPDU_CMD are handled differently.
944 * REPLY_RX: physical layer info is in this buffer
945 * REPLY_RX_MPDU_CMD: physical layer info was sent in separate
946 * command and cached in priv->last_phy_res
947 *
948 * Here we set up local variables depending on which command is
949 * received.
950 */
951 if (pkt->hdr.cmd == REPLY_RX) {
952 phy_res = (struct iwl_rx_phy_res *)pkt->u.raw;
953 header = (struct ieee80211_hdr *)(pkt->u.raw + sizeof(*phy_res)
954 + phy_res->cfg_phy_cnt);
955
956 len = le16_to_cpu(phy_res->byte_count);
957 rx_pkt_status = *(__le32 *)(pkt->u.raw + sizeof(*phy_res) +
958 phy_res->cfg_phy_cnt + len);
959 ampdu_status = le32_to_cpu(rx_pkt_status);
960 } else {
961 if (!priv->last_phy_res_valid) {
962 IWL_ERR(priv, "MPDU frame without cached PHY data\n");
963 return 0;
964 }
965 phy_res = &priv->last_phy_res;
966 amsdu = (struct iwl_rx_mpdu_res_start *)pkt->u.raw;
967 header = (struct ieee80211_hdr *)(pkt->u.raw + sizeof(*amsdu));
968 len = le16_to_cpu(amsdu->byte_count);
969 rx_pkt_status = *(__le32 *)(pkt->u.raw + sizeof(*amsdu) + len);
970 ampdu_status = iwlagn_translate_rx_status(priv,
971 le32_to_cpu(rx_pkt_status));
972 }
973
974 if ((unlikely(phy_res->cfg_phy_cnt > 20))) {
975 IWL_DEBUG_DROP(priv, "dsp size out of range [0,20]: %d/n",
976 phy_res->cfg_phy_cnt);
977 return 0;
978 }
979
980 if (!(rx_pkt_status & RX_RES_STATUS_NO_CRC32_ERROR) ||
981 !(rx_pkt_status & RX_RES_STATUS_NO_RXE_OVERFLOW)) {
982 IWL_DEBUG_RX(priv, "Bad CRC or FIFO: 0x%08X.\n",
983 le32_to_cpu(rx_pkt_status));
984 return 0;
985 }
986
987 /* This will be used in several places later */
988 rate_n_flags = le32_to_cpu(phy_res->rate_n_flags);
989
990 /* rx_status carries information about the packet to mac80211 */
991 rx_status.mactime = le64_to_cpu(phy_res->timestamp);
992 rx_status.band = (phy_res->phy_flags & RX_RES_PHY_FLAGS_BAND_24_MSK) ?
993 IEEE80211_BAND_2GHZ : IEEE80211_BAND_5GHZ;
994 rx_status.freq =
995 ieee80211_channel_to_frequency(le16_to_cpu(phy_res->channel),
996 rx_status.band);
997 rx_status.rate_idx =
998 iwlagn_hwrate_to_mac80211_idx(rate_n_flags, rx_status.band);
999 rx_status.flag = 0;
1000
1001 /* TSF isn't reliable. In order to allow smooth user experience,
1002 * this W/A doesn't propagate it to the mac80211 */
1003 /*rx_status.flag |= RX_FLAG_MACTIME_MPDU;*/
1004
1005 priv->ucode_beacon_time = le32_to_cpu(phy_res->beacon_time_stamp);
1006
1007 /* Find max signal strength (dBm) among 3 antenna/receiver chains */
1008 rx_status.signal = iwlagn_calc_rssi(priv, phy_res);
1009
1010 iwl_dbg_log_rx_data_frame(priv, len, header);
1011 IWL_DEBUG_STATS_LIMIT(priv, "Rssi %d, TSF %llu\n",
1012 rx_status.signal, (unsigned long long)rx_status.mactime);
1013
1014 /*
1015 * "antenna number"
1016 *
1017 * It seems that the antenna field in the phy flags value
1018 * is actually a bit field. This is undefined by radiotap,
1019 * it wants an actual antenna number but I always get "7"
1020 * for most legacy frames I receive indicating that the
1021 * same frame was received on all three RX chains.
1022 *
1023 * I think this field should be removed in favor of a
1024 * new 802.11n radiotap field "RX chains" that is defined
1025 * as a bitmask.
1026 */
1027 rx_status.antenna =
1028 (le16_to_cpu(phy_res->phy_flags) & RX_RES_PHY_FLAGS_ANTENNA_MSK)
1029 >> RX_RES_PHY_FLAGS_ANTENNA_POS;
1030
1031 /* set the preamble flag if appropriate */
1032 if (phy_res->phy_flags & RX_RES_PHY_FLAGS_SHORT_PREAMBLE_MSK)
1033 rx_status.flag |= RX_FLAG_SHORTPRE;
1034
1035 /* Set up the HT phy flags */
1036 if (rate_n_flags & RATE_MCS_HT_MSK)
1037 rx_status.flag |= RX_FLAG_HT;
1038 if (rate_n_flags & RATE_MCS_HT40_MSK)
1039 rx_status.flag |= RX_FLAG_40MHZ;
1040 if (rate_n_flags & RATE_MCS_SGI_MSK)
1041 rx_status.flag |= RX_FLAG_SHORT_GI;
1042
1043 iwlagn_pass_packet_to_mac80211(priv, header, len, ampdu_status,
1044 rxb, &rx_status);
1045 return 0;
1046 }
1047
1048 static int iwlagn_rx_noa_notification(struct iwl_priv *priv,
1049 struct iwl_rx_cmd_buffer *rxb,
1050 struct iwl_device_cmd *cmd)
1051 {
1052 struct iwl_wipan_noa_data *new_data, *old_data;
1053 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1054 struct iwl_wipan_noa_notification *noa_notif = (void *)pkt->u.raw;
1055
1056 /* no condition -- we're in softirq */
1057 old_data = rcu_dereference_protected(priv->noa_data, true);
1058
1059 if (noa_notif->noa_active) {
1060 u32 len = le16_to_cpu(noa_notif->noa_attribute.length);
1061 u32 copylen = len;
1062
1063 /* EID, len, OUI, subtype */
1064 len += 1 + 1 + 3 + 1;
1065 /* P2P id, P2P length */
1066 len += 1 + 2;
1067 copylen += 1 + 2;
1068
1069 new_data = kmalloc(sizeof(*new_data) + len, GFP_ATOMIC);
1070 if (new_data) {
1071 new_data->length = len;
1072 new_data->data[0] = WLAN_EID_VENDOR_SPECIFIC;
1073 new_data->data[1] = len - 2; /* not counting EID, len */
1074 new_data->data[2] = (WLAN_OUI_WFA >> 16) & 0xff;
1075 new_data->data[3] = (WLAN_OUI_WFA >> 8) & 0xff;
1076 new_data->data[4] = (WLAN_OUI_WFA >> 0) & 0xff;
1077 new_data->data[5] = WLAN_OUI_TYPE_WFA_P2P;
1078 memcpy(&new_data->data[6], &noa_notif->noa_attribute,
1079 copylen);
1080 }
1081 } else
1082 new_data = NULL;
1083
1084 rcu_assign_pointer(priv->noa_data, new_data);
1085
1086 if (old_data)
1087 kfree_rcu(old_data, rcu_head);
1088
1089 return 0;
1090 }
1091
1092 /**
1093 * iwl_setup_rx_handlers - Initialize Rx handler callbacks
1094 *
1095 * Setup the RX handlers for each of the reply types sent from the uCode
1096 * to the host.
1097 */
1098 void iwl_setup_rx_handlers(struct iwl_priv *priv)
1099 {
1100 int (**handlers)(struct iwl_priv *priv, struct iwl_rx_cmd_buffer *rxb,
1101 struct iwl_device_cmd *cmd);
1102
1103 handlers = priv->rx_handlers;
1104
1105 handlers[REPLY_ERROR] = iwlagn_rx_reply_error;
1106 handlers[CHANNEL_SWITCH_NOTIFICATION] = iwlagn_rx_csa;
1107 handlers[SPECTRUM_MEASURE_NOTIFICATION] =
1108 iwlagn_rx_spectrum_measure_notif;
1109 handlers[PM_SLEEP_NOTIFICATION] = iwlagn_rx_pm_sleep_notif;
1110 handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
1111 iwlagn_rx_pm_debug_statistics_notif;
1112 handlers[BEACON_NOTIFICATION] = iwlagn_rx_beacon_notif;
1113 handlers[REPLY_ADD_STA] = iwl_add_sta_callback;
1114
1115 handlers[REPLY_WIPAN_NOA_NOTIFICATION] = iwlagn_rx_noa_notification;
1116
1117 /*
1118 * The same handler is used for both the REPLY to a discrete
1119 * statistics request from the host as well as for the periodic
1120 * statistics notifications (after received beacons) from the uCode.
1121 */
1122 handlers[REPLY_STATISTICS_CMD] = iwlagn_rx_reply_statistics;
1123 handlers[STATISTICS_NOTIFICATION] = iwlagn_rx_statistics;
1124
1125 iwl_setup_rx_scan_handlers(priv);
1126
1127 handlers[CARD_STATE_NOTIFICATION] = iwlagn_rx_card_state_notif;
1128 handlers[MISSED_BEACONS_NOTIFICATION] =
1129 iwlagn_rx_missed_beacon_notif;
1130
1131 /* Rx handlers */
1132 handlers[REPLY_RX_PHY_CMD] = iwlagn_rx_reply_rx_phy;
1133 handlers[REPLY_RX_MPDU_CMD] = iwlagn_rx_reply_rx;
1134
1135 /* block ack */
1136 handlers[REPLY_COMPRESSED_BA] =
1137 iwlagn_rx_reply_compressed_ba;
1138
1139 /* init calibration handlers */
1140 priv->rx_handlers[CALIBRATION_RES_NOTIFICATION] =
1141 iwlagn_rx_calib_result;
1142 priv->rx_handlers[REPLY_TX] = iwlagn_rx_reply_tx;
1143
1144 /* set up notification wait support */
1145 spin_lock_init(&priv->shrd->notif_wait_lock);
1146 INIT_LIST_HEAD(&priv->shrd->notif_waits);
1147 init_waitqueue_head(&priv->shrd->notif_waitq);
1148
1149 /* Set up BT Rx handlers */
1150 if (cfg(priv)->lib->bt_rx_handler_setup)
1151 cfg(priv)->lib->bt_rx_handler_setup(priv);
1152
1153 }
1154
1155 int iwl_rx_dispatch(struct iwl_op_mode *op_mode, struct iwl_rx_cmd_buffer *rxb,
1156 struct iwl_device_cmd *cmd)
1157 {
1158 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1159 struct iwl_priv *priv = IWL_OP_MODE_GET_DVM(op_mode);
1160 int err = 0;
1161
1162 /*
1163 * Do the notification wait before RX handlers so
1164 * even if the RX handler consumes the RXB we have
1165 * access to it in the notification wait entry.
1166 */
1167 if (!list_empty(&priv->shrd->notif_waits)) {
1168 struct iwl_notification_wait *w;
1169
1170 spin_lock(&priv->shrd->notif_wait_lock);
1171 list_for_each_entry(w, &priv->shrd->notif_waits, list) {
1172 if (w->cmd != pkt->hdr.cmd)
1173 continue;
1174 IWL_DEBUG_RX(priv,
1175 "Notif: %s, 0x%02x - wake the callers up\n",
1176 get_cmd_string(pkt->hdr.cmd),
1177 pkt->hdr.cmd);
1178 w->triggered = true;
1179 if (w->fn)
1180 w->fn(trans(priv), pkt, w->fn_data);
1181 }
1182 spin_unlock(&priv->shrd->notif_wait_lock);
1183
1184 wake_up_all(&priv->shrd->notif_waitq);
1185 }
1186
1187 if (priv->pre_rx_handler &&
1188 priv->shrd->ucode_owner == IWL_OWNERSHIP_TM)
1189 priv->pre_rx_handler(priv, rxb);
1190 else {
1191 /* Based on type of command response or notification,
1192 * handle those that need handling via function in
1193 * rx_handlers table. See iwl_setup_rx_handlers() */
1194 if (priv->rx_handlers[pkt->hdr.cmd]) {
1195 priv->rx_handlers_stats[pkt->hdr.cmd]++;
1196 err = priv->rx_handlers[pkt->hdr.cmd] (priv, rxb, cmd);
1197 } else {
1198 /* No handling needed */
1199 IWL_DEBUG_RX(priv,
1200 "No handler needed for %s, 0x%02x\n",
1201 get_cmd_string(pkt->hdr.cmd), pkt->hdr.cmd);
1202 }
1203 }
1204 return err;
1205 }
Linux kernel - Deliverables
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