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Diffstat (limited to 'drivers/net/wireless/iwlwifi/dvm/rx.c')
-rw-r--r--drivers/net/wireless/iwlwifi/dvm/rx.c1166
1 files changed, 1166 insertions, 0 deletions
diff --git a/drivers/net/wireless/iwlwifi/dvm/rx.c b/drivers/net/wireless/iwlwifi/dvm/rx.c
new file mode 100644
index 000000000000..0ed90bb8b56a
--- /dev/null
+++ b/drivers/net/wireless/iwlwifi/dvm/rx.c
@@ -0,0 +1,1166 @@
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-io.h"
36#include "dev.h"
37#include "calib.h"
38#include "agn.h"
39
40#define IWL_CMD_ENTRY(x) [x] = #x
41
42const 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_RX),
92 IWL_CMD_ENTRY(REPLY_COMPRESSED_BA),
93 IWL_CMD_ENTRY(CALIBRATION_CFG_CMD),
94 IWL_CMD_ENTRY(CALIBRATION_RES_NOTIFICATION),
95 IWL_CMD_ENTRY(CALIBRATION_COMPLETE_NOTIFICATION),
96 IWL_CMD_ENTRY(REPLY_TX_POWER_DBM_CMD),
97 IWL_CMD_ENTRY(TEMPERATURE_NOTIFICATION),
98 IWL_CMD_ENTRY(TX_ANT_CONFIGURATION_CMD),
99 IWL_CMD_ENTRY(REPLY_BT_COEX_PROFILE_NOTIF),
100 IWL_CMD_ENTRY(REPLY_BT_COEX_PRIO_TABLE),
101 IWL_CMD_ENTRY(REPLY_BT_COEX_PROT_ENV),
102 IWL_CMD_ENTRY(REPLY_WIPAN_PARAMS),
103 IWL_CMD_ENTRY(REPLY_WIPAN_RXON),
104 IWL_CMD_ENTRY(REPLY_WIPAN_RXON_TIMING),
105 IWL_CMD_ENTRY(REPLY_WIPAN_RXON_ASSOC),
106 IWL_CMD_ENTRY(REPLY_WIPAN_QOS_PARAM),
107 IWL_CMD_ENTRY(REPLY_WIPAN_WEPKEY),
108 IWL_CMD_ENTRY(REPLY_WIPAN_P2P_CHANNEL_SWITCH),
109 IWL_CMD_ENTRY(REPLY_WIPAN_NOA_NOTIFICATION),
110 IWL_CMD_ENTRY(REPLY_WIPAN_DEACTIVATION_COMPLETE),
111 IWL_CMD_ENTRY(REPLY_WOWLAN_PATTERNS),
112 IWL_CMD_ENTRY(REPLY_WOWLAN_WAKEUP_FILTER),
113 IWL_CMD_ENTRY(REPLY_WOWLAN_TSC_RSC_PARAMS),
114 IWL_CMD_ENTRY(REPLY_WOWLAN_TKIP_PARAMS),
115 IWL_CMD_ENTRY(REPLY_WOWLAN_KEK_KCK_MATERIAL),
116 IWL_CMD_ENTRY(REPLY_WOWLAN_GET_STATUS),
117 IWL_CMD_ENTRY(REPLY_D3_CONFIG),
118};
119#undef IWL_CMD_ENTRY
120
121/******************************************************************************
122 *
123 * Generic RX handler implementations
124 *
125 ******************************************************************************/
126
127static int iwlagn_rx_reply_error(struct iwl_priv *priv,
128 struct iwl_rx_cmd_buffer *rxb,
129 struct iwl_device_cmd *cmd)
130{
131 struct iwl_rx_packet *pkt = rxb_addr(rxb);
132 struct iwl_error_resp *err_resp = (void *)pkt->data;
133
134 IWL_ERR(priv, "Error Reply type 0x%08X cmd REPLY_ERROR (0x%02X) "
135 "seq 0x%04X ser 0x%08X\n",
136 le32_to_cpu(err_resp->error_type),
137 err_resp->cmd_id,
138 le16_to_cpu(err_resp->bad_cmd_seq_num),
139 le32_to_cpu(err_resp->error_info));
140 return 0;
141}
142
143static int iwlagn_rx_csa(struct iwl_priv *priv, struct iwl_rx_cmd_buffer *rxb,
144 struct iwl_device_cmd *cmd)
145{
146 struct iwl_rx_packet *pkt = rxb_addr(rxb);
147 struct iwl_csa_notification *csa = (void *)pkt->data;
148 /*
149 * MULTI-FIXME
150 * See iwlagn_mac_channel_switch.
151 */
152 struct iwl_rxon_context *ctx = &priv->contexts[IWL_RXON_CTX_BSS];
153 struct iwl_rxon_cmd *rxon = (void *)&ctx->active;
154
155 if (!test_bit(STATUS_CHANNEL_SWITCH_PENDING, &priv->status))
156 return 0;
157
158 if (!le32_to_cpu(csa->status) && csa->channel == priv->switch_channel) {
159 rxon->channel = csa->channel;
160 ctx->staging.channel = csa->channel;
161 IWL_DEBUG_11H(priv, "CSA notif: channel %d\n",
162 le16_to_cpu(csa->channel));
163 iwl_chswitch_done(priv, true);
164 } else {
165 IWL_ERR(priv, "CSA notif (fail) : channel %d\n",
166 le16_to_cpu(csa->channel));
167 iwl_chswitch_done(priv, false);
168 }
169 return 0;
170}
171
172
173static int iwlagn_rx_spectrum_measure_notif(struct iwl_priv *priv,
174 struct iwl_rx_cmd_buffer *rxb,
175 struct iwl_device_cmd *cmd)
176{
177 struct iwl_rx_packet *pkt = rxb_addr(rxb);
178 struct iwl_spectrum_notification *report = (void *)pkt->data;
179
180 if (!report->state) {
181 IWL_DEBUG_11H(priv,
182 "Spectrum Measure Notification: Start\n");
183 return 0;
184 }
185
186 memcpy(&priv->measure_report, report, sizeof(*report));
187 priv->measurement_status |= MEASUREMENT_READY;
188 return 0;
189}
190
191static int iwlagn_rx_pm_sleep_notif(struct iwl_priv *priv,
192 struct iwl_rx_cmd_buffer *rxb,
193 struct iwl_device_cmd *cmd)
194{
195#ifdef CONFIG_IWLWIFI_DEBUG
196 struct iwl_rx_packet *pkt = rxb_addr(rxb);
197 struct iwl_sleep_notification *sleep = (void *)pkt->data;
198 IWL_DEBUG_RX(priv, "sleep mode: %d, src: %d\n",
199 sleep->pm_sleep_mode, sleep->pm_wakeup_src);
200#endif
201 return 0;
202}
203
204static int iwlagn_rx_pm_debug_statistics_notif(struct iwl_priv *priv,
205 struct iwl_rx_cmd_buffer *rxb,
206 struct iwl_device_cmd *cmd)
207{
208 struct iwl_rx_packet *pkt = rxb_addr(rxb);
209 u32 __maybe_unused len =
210 le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK;
211 IWL_DEBUG_RADIO(priv, "Dumping %d bytes of unhandled "
212 "notification for PM_DEBUG_STATISTIC_NOTIFIC:\n", len);
213 iwl_print_hex_dump(priv, IWL_DL_RADIO, pkt->data, len);
214 return 0;
215}
216
217static int iwlagn_rx_beacon_notif(struct iwl_priv *priv,
218 struct iwl_rx_cmd_buffer *rxb,
219 struct iwl_device_cmd *cmd)
220{
221 struct iwl_rx_packet *pkt = rxb_addr(rxb);
222 struct iwlagn_beacon_notif *beacon = (void *)pkt->data;
223#ifdef CONFIG_IWLWIFI_DEBUG
224 u16 status = le16_to_cpu(beacon->beacon_notify_hdr.status.status);
225 u8 rate = iwl_hw_get_rate(beacon->beacon_notify_hdr.rate_n_flags);
226
227 IWL_DEBUG_RX(priv, "beacon status %#x, retries:%d ibssmgr:%d "
228 "tsf:0x%.8x%.8x rate:%d\n",
229 status & TX_STATUS_MSK,
230 beacon->beacon_notify_hdr.failure_frame,
231 le32_to_cpu(beacon->ibss_mgr_status),
232 le32_to_cpu(beacon->high_tsf),
233 le32_to_cpu(beacon->low_tsf), rate);
234#endif
235
236 priv->ibss_manager = le32_to_cpu(beacon->ibss_mgr_status);
237
238 return 0;
239}
240
241/**
242 * iwl_good_plcp_health - checks for plcp error.
243 *
244 * When the plcp error is exceeding the thresholds, reset the radio
245 * to improve the throughput.
246 */
247static bool iwlagn_good_plcp_health(struct iwl_priv *priv,
248 struct statistics_rx_phy *cur_ofdm,
249 struct statistics_rx_ht_phy *cur_ofdm_ht,
250 unsigned int msecs)
251{
252 int delta;
253 int threshold = priv->plcp_delta_threshold;
254
255 if (threshold == IWL_MAX_PLCP_ERR_THRESHOLD_DISABLE) {
256 IWL_DEBUG_RADIO(priv, "plcp_err check disabled\n");
257 return true;
258 }
259
260 delta = le32_to_cpu(cur_ofdm->plcp_err) -
261 le32_to_cpu(priv->statistics.rx_ofdm.plcp_err) +
262 le32_to_cpu(cur_ofdm_ht->plcp_err) -
263 le32_to_cpu(priv->statistics.rx_ofdm_ht.plcp_err);
264
265 /* Can be negative if firmware reset statistics */
266 if (delta <= 0)
267 return true;
268
269 if ((delta * 100 / msecs) > threshold) {
270 IWL_DEBUG_RADIO(priv,
271 "plcp health threshold %u delta %d msecs %u\n",
272 threshold, delta, msecs);
273 return false;
274 }
275
276 return true;
277}
278
279int iwl_force_rf_reset(struct iwl_priv *priv, bool external)
280{
281 struct iwl_rf_reset *rf_reset;
282
283 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
284 return -EAGAIN;
285
286 if (!iwl_is_any_associated(priv)) {
287 IWL_DEBUG_SCAN(priv, "force reset rejected: not associated\n");
288 return -ENOLINK;
289 }
290
291 rf_reset = &priv->rf_reset;
292 rf_reset->reset_request_count++;
293 if (!external && rf_reset->last_reset_jiffies &&
294 time_after(rf_reset->last_reset_jiffies +
295 IWL_DELAY_NEXT_FORCE_RF_RESET, jiffies)) {
296 IWL_DEBUG_INFO(priv, "RF reset rejected\n");
297 rf_reset->reset_reject_count++;
298 return -EAGAIN;
299 }
300 rf_reset->reset_success_count++;
301 rf_reset->last_reset_jiffies = jiffies;
302
303 /*
304 * There is no easy and better way to force reset the radio,
305 * the only known method is switching channel which will force to
306 * reset and tune the radio.
307 * Use internal short scan (single channel) operation to should
308 * achieve this objective.
309 * Driver should reset the radio when number of consecutive missed
310 * beacon, or any other uCode error condition detected.
311 */
312 IWL_DEBUG_INFO(priv, "perform radio reset.\n");
313 iwl_internal_short_hw_scan(priv);
314 return 0;
315}
316
317
318static void iwlagn_recover_from_statistics(struct iwl_priv *priv,
319 struct statistics_rx_phy *cur_ofdm,
320 struct statistics_rx_ht_phy *cur_ofdm_ht,
321 struct statistics_tx *tx,
322 unsigned long stamp)
323{
324 unsigned int msecs;
325
326 if (test_bit(STATUS_EXIT_PENDING, &priv->status))
327 return;
328
329 msecs = jiffies_to_msecs(stamp - priv->rx_statistics_jiffies);
330
331 /* Only gather statistics and update time stamp when not associated */
332 if (!iwl_is_any_associated(priv))
333 return;
334
335 /* Do not check/recover when do not have enough statistics data */
336 if (msecs < 99)
337 return;
338
339 if (iwlwifi_mod_params.plcp_check &&
340 !iwlagn_good_plcp_health(priv, cur_ofdm, cur_ofdm_ht, msecs))
341 iwl_force_rf_reset(priv, false);
342}
343
344/* Calculate noise level, based on measurements during network silence just
345 * before arriving beacon. This measurement can be done only if we know
346 * exactly when to expect beacons, therefore only when we're associated. */
347static void iwlagn_rx_calc_noise(struct iwl_priv *priv)
348{
349 struct statistics_rx_non_phy *rx_info;
350 int num_active_rx = 0;
351 int total_silence = 0;
352 int bcn_silence_a, bcn_silence_b, bcn_silence_c;
353 int last_rx_noise;
354
355 rx_info = &priv->statistics.rx_non_phy;
356
357 bcn_silence_a =
358 le32_to_cpu(rx_info->beacon_silence_rssi_a) & IN_BAND_FILTER;
359 bcn_silence_b =
360 le32_to_cpu(rx_info->beacon_silence_rssi_b) & IN_BAND_FILTER;
361 bcn_silence_c =
362 le32_to_cpu(rx_info->beacon_silence_rssi_c) & IN_BAND_FILTER;
363
364 if (bcn_silence_a) {
365 total_silence += bcn_silence_a;
366 num_active_rx++;
367 }
368 if (bcn_silence_b) {
369 total_silence += bcn_silence_b;
370 num_active_rx++;
371 }
372 if (bcn_silence_c) {
373 total_silence += bcn_silence_c;
374 num_active_rx++;
375 }
376
377 /* Average among active antennas */
378 if (num_active_rx)
379 last_rx_noise = (total_silence / num_active_rx) - 107;
380 else
381 last_rx_noise = IWL_NOISE_MEAS_NOT_AVAILABLE;
382
383 IWL_DEBUG_CALIB(priv, "inband silence a %u, b %u, c %u, dBm %d\n",
384 bcn_silence_a, bcn_silence_b, bcn_silence_c,
385 last_rx_noise);
386}
387
388#ifdef CONFIG_IWLWIFI_DEBUGFS
389/*
390 * based on the assumption of all statistics counter are in DWORD
391 * FIXME: This function is for debugging, do not deal with
392 * the case of counters roll-over.
393 */
394static void accum_stats(__le32 *prev, __le32 *cur, __le32 *delta,
395 __le32 *max_delta, __le32 *accum, int size)
396{
397 int i;
398
399 for (i = 0;
400 i < size / sizeof(__le32);
401 i++, prev++, cur++, delta++, max_delta++, accum++) {
402 if (le32_to_cpu(*cur) > le32_to_cpu(*prev)) {
403 *delta = cpu_to_le32(
404 le32_to_cpu(*cur) - le32_to_cpu(*prev));
405 le32_add_cpu(accum, le32_to_cpu(*delta));
406 if (le32_to_cpu(*delta) > le32_to_cpu(*max_delta))
407 *max_delta = *delta;
408 }
409 }
410}
411
412static void
413iwlagn_accumulative_statistics(struct iwl_priv *priv,
414 struct statistics_general_common *common,
415 struct statistics_rx_non_phy *rx_non_phy,
416 struct statistics_rx_phy *rx_ofdm,
417 struct statistics_rx_ht_phy *rx_ofdm_ht,
418 struct statistics_rx_phy *rx_cck,
419 struct statistics_tx *tx,
420 struct statistics_bt_activity *bt_activity)
421{
422#define ACCUM(_name) \
423 accum_stats((__le32 *)&priv->statistics._name, \
424 (__le32 *)_name, \
425 (__le32 *)&priv->delta_stats._name, \
426 (__le32 *)&priv->max_delta_stats._name, \
427 (__le32 *)&priv->accum_stats._name, \
428 sizeof(*_name));
429
430 ACCUM(common);
431 ACCUM(rx_non_phy);
432 ACCUM(rx_ofdm);
433 ACCUM(rx_ofdm_ht);
434 ACCUM(rx_cck);
435 ACCUM(tx);
436 if (bt_activity)
437 ACCUM(bt_activity);
438#undef ACCUM
439}
440#else
441static inline void
442iwlagn_accumulative_statistics(struct iwl_priv *priv,
443 struct statistics_general_common *common,
444 struct statistics_rx_non_phy *rx_non_phy,
445 struct statistics_rx_phy *rx_ofdm,
446 struct statistics_rx_ht_phy *rx_ofdm_ht,
447 struct statistics_rx_phy *rx_cck,
448 struct statistics_tx *tx,
449 struct statistics_bt_activity *bt_activity)
450{
451}
452#endif
453
454static int iwlagn_rx_statistics(struct iwl_priv *priv,
455 struct iwl_rx_cmd_buffer *rxb,
456 struct iwl_device_cmd *cmd)
457{
458 unsigned long stamp = jiffies;
459 const int reg_recalib_period = 60;
460 int change;
461 struct iwl_rx_packet *pkt = rxb_addr(rxb);
462 u32 len = le32_to_cpu(pkt->len_n_flags) & FH_RSCSR_FRAME_SIZE_MSK;
463 __le32 *flag;
464 struct statistics_general_common *common;
465 struct statistics_rx_non_phy *rx_non_phy;
466 struct statistics_rx_phy *rx_ofdm;
467 struct statistics_rx_ht_phy *rx_ofdm_ht;
468 struct statistics_rx_phy *rx_cck;
469 struct statistics_tx *tx;
470 struct statistics_bt_activity *bt_activity;
471
472 len -= sizeof(struct iwl_cmd_header); /* skip header */
473
474 IWL_DEBUG_RX(priv, "Statistics notification received (%d bytes).\n",
475 len);
476
477 spin_lock(&priv->statistics.lock);
478
479 if (len == sizeof(struct iwl_bt_notif_statistics)) {
480 struct iwl_bt_notif_statistics *stats;
481 stats = (void *)&pkt->data;
482 flag = &stats->flag;
483 common = &stats->general.common;
484 rx_non_phy = &stats->rx.general.common;
485 rx_ofdm = &stats->rx.ofdm;
486 rx_ofdm_ht = &stats->rx.ofdm_ht;
487 rx_cck = &stats->rx.cck;
488 tx = &stats->tx;
489 bt_activity = &stats->general.activity;
490
491#ifdef CONFIG_IWLWIFI_DEBUGFS
492 /* handle this exception directly */
493 priv->statistics.num_bt_kills = stats->rx.general.num_bt_kills;
494 le32_add_cpu(&priv->statistics.accum_num_bt_kills,
495 le32_to_cpu(stats->rx.general.num_bt_kills));
496#endif
497 } else if (len == sizeof(struct iwl_notif_statistics)) {
498 struct iwl_notif_statistics *stats;
499 stats = (void *)&pkt->data;
500 flag = &stats->flag;
501 common = &stats->general.common;
502 rx_non_phy = &stats->rx.general;
503 rx_ofdm = &stats->rx.ofdm;
504 rx_ofdm_ht = &stats->rx.ofdm_ht;
505 rx_cck = &stats->rx.cck;
506 tx = &stats->tx;
507 bt_activity = NULL;
508 } else {
509 WARN_ONCE(1, "len %d doesn't match BT (%zu) or normal (%zu)\n",
510 len, sizeof(struct iwl_bt_notif_statistics),
511 sizeof(struct iwl_notif_statistics));
512 spin_unlock(&priv->statistics.lock);
513 return 0;
514 }
515
516 change = common->temperature != priv->statistics.common.temperature ||
517 (*flag & STATISTICS_REPLY_FLG_HT40_MODE_MSK) !=
518 (priv->statistics.flag & STATISTICS_REPLY_FLG_HT40_MODE_MSK);
519
520 iwlagn_accumulative_statistics(priv, common, rx_non_phy, rx_ofdm,
521 rx_ofdm_ht, rx_cck, tx, bt_activity);
522
523 iwlagn_recover_from_statistics(priv, rx_ofdm, rx_ofdm_ht, tx, stamp);
524
525 priv->statistics.flag = *flag;
526 memcpy(&priv->statistics.common, common, sizeof(*common));
527 memcpy(&priv->statistics.rx_non_phy, rx_non_phy, sizeof(*rx_non_phy));
528 memcpy(&priv->statistics.rx_ofdm, rx_ofdm, sizeof(*rx_ofdm));
529 memcpy(&priv->statistics.rx_ofdm_ht, rx_ofdm_ht, sizeof(*rx_ofdm_ht));
530 memcpy(&priv->statistics.rx_cck, rx_cck, sizeof(*rx_cck));
531 memcpy(&priv->statistics.tx, tx, sizeof(*tx));
532#ifdef CONFIG_IWLWIFI_DEBUGFS
533 if (bt_activity)
534 memcpy(&priv->statistics.bt_activity, bt_activity,
535 sizeof(*bt_activity));
536#endif
537
538 priv->rx_statistics_jiffies = stamp;
539
540 set_bit(STATUS_STATISTICS, &priv->status);
541
542 /* Reschedule the statistics timer to occur in
543 * reg_recalib_period seconds to ensure we get a
544 * thermal update even if the uCode doesn't give
545 * us one */
546 mod_timer(&priv->statistics_periodic, jiffies +
547 msecs_to_jiffies(reg_recalib_period * 1000));
548
549 if (unlikely(!test_bit(STATUS_SCANNING, &priv->status)) &&
550 (pkt->hdr.cmd == STATISTICS_NOTIFICATION)) {
551 iwlagn_rx_calc_noise(priv);
552 queue_work(priv->workqueue, &priv->run_time_calib_work);
553 }
554 if (priv->lib->temperature && change)
555 priv->lib->temperature(priv);
556
557 spin_unlock(&priv->statistics.lock);
558
559 return 0;
560}
561
562static int iwlagn_rx_reply_statistics(struct iwl_priv *priv,
563 struct iwl_rx_cmd_buffer *rxb,
564 struct iwl_device_cmd *cmd)
565{
566 struct iwl_rx_packet *pkt = rxb_addr(rxb);
567 struct iwl_notif_statistics *stats = (void *)pkt->data;
568
569 if (le32_to_cpu(stats->flag) & UCODE_STATISTICS_CLEAR_MSK) {
570#ifdef CONFIG_IWLWIFI_DEBUGFS
571 memset(&priv->accum_stats, 0,
572 sizeof(priv->accum_stats));
573 memset(&priv->delta_stats, 0,
574 sizeof(priv->delta_stats));
575 memset(&priv->max_delta_stats, 0,
576 sizeof(priv->max_delta_stats));
577#endif
578 IWL_DEBUG_RX(priv, "Statistics have been cleared\n");
579 }
580 iwlagn_rx_statistics(priv, rxb, cmd);
581 return 0;
582}
583
584/* Handle notification from uCode that card's power state is changing
585 * due to software, hardware, or critical temperature RFKILL */
586static int iwlagn_rx_card_state_notif(struct iwl_priv *priv,
587 struct iwl_rx_cmd_buffer *rxb,
588 struct iwl_device_cmd *cmd)
589{
590 struct iwl_rx_packet *pkt = rxb_addr(rxb);
591 struct iwl_card_state_notif *card_state_notif = (void *)pkt->data;
592 u32 flags = le32_to_cpu(card_state_notif->flags);
593 unsigned long status = priv->status;
594
595 IWL_DEBUG_RF_KILL(priv, "Card state received: HW:%s SW:%s CT:%s\n",
596 (flags & HW_CARD_DISABLED) ? "Kill" : "On",
597 (flags & SW_CARD_DISABLED) ? "Kill" : "On",
598 (flags & CT_CARD_DISABLED) ?
599 "Reached" : "Not reached");
600
601 if (flags & (SW_CARD_DISABLED | HW_CARD_DISABLED |
602 CT_CARD_DISABLED)) {
603
604 iwl_write32(priv->trans, CSR_UCODE_DRV_GP1_SET,
605 CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
606
607 iwl_write_direct32(priv->trans, HBUS_TARG_MBX_C,
608 HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
609
610 if (!(flags & RXON_CARD_DISABLED)) {
611 iwl_write32(priv->trans, CSR_UCODE_DRV_GP1_CLR,
612 CSR_UCODE_DRV_GP1_BIT_CMD_BLOCKED);
613 iwl_write_direct32(priv->trans, HBUS_TARG_MBX_C,
614 HBUS_TARG_MBX_C_REG_BIT_CMD_BLOCKED);
615 }
616 if (flags & CT_CARD_DISABLED)
617 iwl_tt_enter_ct_kill(priv);
618 }
619 if (!(flags & CT_CARD_DISABLED))
620 iwl_tt_exit_ct_kill(priv);
621
622 if (flags & HW_CARD_DISABLED)
623 set_bit(STATUS_RF_KILL_HW, &priv->status);
624 else
625 clear_bit(STATUS_RF_KILL_HW, &priv->status);
626
627
628 if (!(flags & RXON_CARD_DISABLED))
629 iwl_scan_cancel(priv);
630
631 if ((test_bit(STATUS_RF_KILL_HW, &status) !=
632 test_bit(STATUS_RF_KILL_HW, &priv->status)))
633 wiphy_rfkill_set_hw_state(priv->hw->wiphy,
634 test_bit(STATUS_RF_KILL_HW, &priv->status));
635 else
636 wake_up(&priv->trans->wait_command_queue);
637 return 0;
638}
639
640static int iwlagn_rx_missed_beacon_notif(struct iwl_priv *priv,
641 struct iwl_rx_cmd_buffer *rxb,
642 struct iwl_device_cmd *cmd)
643
644{
645 struct iwl_rx_packet *pkt = rxb_addr(rxb);
646 struct iwl_missed_beacon_notif *missed_beacon = (void *)pkt->data;
647
648 if (le32_to_cpu(missed_beacon->consecutive_missed_beacons) >
649 priv->missed_beacon_threshold) {
650 IWL_DEBUG_CALIB(priv,
651 "missed bcn cnsq %d totl %d rcd %d expctd %d\n",
652 le32_to_cpu(missed_beacon->consecutive_missed_beacons),
653 le32_to_cpu(missed_beacon->total_missed_becons),
654 le32_to_cpu(missed_beacon->num_recvd_beacons),
655 le32_to_cpu(missed_beacon->num_expected_beacons));
656 if (!test_bit(STATUS_SCANNING, &priv->status))
657 iwl_init_sensitivity(priv);
658 }
659 return 0;
660}
661
662/* Cache phy data (Rx signal strength, etc) for HT frame (REPLY_RX_PHY_CMD).
663 * This will be used later in iwl_rx_reply_rx() for REPLY_RX_MPDU_CMD. */
664static int iwlagn_rx_reply_rx_phy(struct iwl_priv *priv,
665 struct iwl_rx_cmd_buffer *rxb,
666 struct iwl_device_cmd *cmd)
667{
668 struct iwl_rx_packet *pkt = rxb_addr(rxb);
669
670 priv->last_phy_res_valid = true;
671 memcpy(&priv->last_phy_res, pkt->data,
672 sizeof(struct iwl_rx_phy_res));
673 return 0;
674}
675
676/*
677 * returns non-zero if packet should be dropped
678 */
679static int iwlagn_set_decrypted_flag(struct iwl_priv *priv,
680 struct ieee80211_hdr *hdr,
681 u32 decrypt_res,
682 struct ieee80211_rx_status *stats)
683{
684 u16 fc = le16_to_cpu(hdr->frame_control);
685
686 /*
687 * All contexts have the same setting here due to it being
688 * a module parameter, so OK to check any context.
689 */
690 if (priv->contexts[IWL_RXON_CTX_BSS].active.filter_flags &
691 RXON_FILTER_DIS_DECRYPT_MSK)
692 return 0;
693
694 if (!(fc & IEEE80211_FCTL_PROTECTED))
695 return 0;
696
697 IWL_DEBUG_RX(priv, "decrypt_res:0x%x\n", decrypt_res);
698 switch (decrypt_res & RX_RES_STATUS_SEC_TYPE_MSK) {
699 case RX_RES_STATUS_SEC_TYPE_TKIP:
700 /* The uCode has got a bad phase 1 Key, pushes the packet.
701 * Decryption will be done in SW. */
702 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
703 RX_RES_STATUS_BAD_KEY_TTAK)
704 break;
705
706 case RX_RES_STATUS_SEC_TYPE_WEP:
707 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
708 RX_RES_STATUS_BAD_ICV_MIC) {
709 /* bad ICV, the packet is destroyed since the
710 * decryption is inplace, drop it */
711 IWL_DEBUG_RX(priv, "Packet destroyed\n");
712 return -1;
713 }
714 case RX_RES_STATUS_SEC_TYPE_CCMP:
715 if ((decrypt_res & RX_RES_STATUS_DECRYPT_TYPE_MSK) ==
716 RX_RES_STATUS_DECRYPT_OK) {
717 IWL_DEBUG_RX(priv, "hw decrypt successfully!!!\n");
718 stats->flag |= RX_FLAG_DECRYPTED;
719 }
720 break;
721
722 default:
723 break;
724 }
725 return 0;
726}
727
728static void iwlagn_pass_packet_to_mac80211(struct iwl_priv *priv,
729 struct ieee80211_hdr *hdr,
730 u16 len,
731 u32 ampdu_status,
732 struct iwl_rx_cmd_buffer *rxb,
733 struct ieee80211_rx_status *stats)
734{
735 struct sk_buff *skb;
736 __le16 fc = hdr->frame_control;
737 struct iwl_rxon_context *ctx;
738 unsigned int hdrlen, fraglen;
739
740 /* We only process data packets if the interface is open */
741 if (unlikely(!priv->is_open)) {
742 IWL_DEBUG_DROP_LIMIT(priv,
743 "Dropping packet while interface is not open.\n");
744 return;
745 }
746
747 /* In case of HW accelerated crypto and bad decryption, drop */
748 if (!iwlwifi_mod_params.sw_crypto &&
749 iwlagn_set_decrypted_flag(priv, hdr, ampdu_status, stats))
750 return;
751
752 /* Dont use dev_alloc_skb(), we'll have enough headroom once
753 * ieee80211_hdr pulled.
754 */
755 skb = alloc_skb(128, GFP_ATOMIC);
756 if (!skb) {
757 IWL_ERR(priv, "alloc_skb failed\n");
758 return;
759 }
760 /* If frame is small enough to fit in skb->head, pull it completely.
761 * If not, only pull ieee80211_hdr so that splice() or TCP coalesce
762 * are more efficient.
763 */
764 hdrlen = (len <= skb_tailroom(skb)) ? len : sizeof(*hdr);
765
766 memcpy(skb_put(skb, hdrlen), hdr, hdrlen);
767 fraglen = len - hdrlen;
768
769 if (fraglen) {
770 int offset = (void *)hdr + hdrlen -
771 rxb_addr(rxb) + rxb_offset(rxb);
772
773 skb_add_rx_frag(skb, 0, rxb_steal_page(rxb), offset,
774 fraglen, rxb->truesize);
775 }
776
777 /*
778 * Wake any queues that were stopped due to a passive channel tx
779 * failure. This can happen because the regulatory enforcement in
780 * the device waits for a beacon before allowing transmission,
781 * sometimes even after already having transmitted frames for the
782 * association because the new RXON may reset the information.
783 */
784 if (unlikely(ieee80211_is_beacon(fc) && priv->passive_no_rx)) {
785 for_each_context(priv, ctx) {
786 if (!ether_addr_equal(hdr->addr3,
787 ctx->active.bssid_addr))
788 continue;
789 iwlagn_lift_passive_no_rx(priv);
790 }
791 }
792
793 memcpy(IEEE80211_SKB_RXCB(skb), stats, sizeof(*stats));
794
795 ieee80211_rx(priv->hw, skb);
796}
797
798static u32 iwlagn_translate_rx_status(struct iwl_priv *priv, u32 decrypt_in)
799{
800 u32 decrypt_out = 0;
801
802 if ((decrypt_in & RX_RES_STATUS_STATION_FOUND) ==
803 RX_RES_STATUS_STATION_FOUND)
804 decrypt_out |= (RX_RES_STATUS_STATION_FOUND |
805 RX_RES_STATUS_NO_STATION_INFO_MISMATCH);
806
807 decrypt_out |= (decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK);
808
809 /* packet was not encrypted */
810 if ((decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) ==
811 RX_RES_STATUS_SEC_TYPE_NONE)
812 return decrypt_out;
813
814 /* packet was encrypted with unknown alg */
815 if ((decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) ==
816 RX_RES_STATUS_SEC_TYPE_ERR)
817 return decrypt_out;
818
819 /* decryption was not done in HW */
820 if ((decrypt_in & RX_MPDU_RES_STATUS_DEC_DONE_MSK) !=
821 RX_MPDU_RES_STATUS_DEC_DONE_MSK)
822 return decrypt_out;
823
824 switch (decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) {
825
826 case RX_RES_STATUS_SEC_TYPE_CCMP:
827 /* alg is CCM: check MIC only */
828 if (!(decrypt_in & RX_MPDU_RES_STATUS_MIC_OK))
829 /* Bad MIC */
830 decrypt_out |= RX_RES_STATUS_BAD_ICV_MIC;
831 else
832 decrypt_out |= RX_RES_STATUS_DECRYPT_OK;
833
834 break;
835
836 case RX_RES_STATUS_SEC_TYPE_TKIP:
837 if (!(decrypt_in & RX_MPDU_RES_STATUS_TTAK_OK)) {
838 /* Bad TTAK */
839 decrypt_out |= RX_RES_STATUS_BAD_KEY_TTAK;
840 break;
841 }
842 /* fall through if TTAK OK */
843 default:
844 if (!(decrypt_in & RX_MPDU_RES_STATUS_ICV_OK))
845 decrypt_out |= RX_RES_STATUS_BAD_ICV_MIC;
846 else
847 decrypt_out |= RX_RES_STATUS_DECRYPT_OK;
848 break;
849 }
850
851 IWL_DEBUG_RX(priv, "decrypt_in:0x%x decrypt_out = 0x%x\n",
852 decrypt_in, decrypt_out);
853
854 return decrypt_out;
855}
856
857/* Calc max signal level (dBm) among 3 possible receivers */
858static int iwlagn_calc_rssi(struct iwl_priv *priv,
859 struct iwl_rx_phy_res *rx_resp)
860{
861 /* data from PHY/DSP regarding signal strength, etc.,
862 * contents are always there, not configurable by host
863 */
864 struct iwlagn_non_cfg_phy *ncphy =
865 (struct iwlagn_non_cfg_phy *)rx_resp->non_cfg_phy_buf;
866 u32 val, rssi_a, rssi_b, rssi_c, max_rssi;
867 u8 agc;
868
869 val = le32_to_cpu(ncphy->non_cfg_phy[IWLAGN_RX_RES_AGC_IDX]);
870 agc = (val & IWLAGN_OFDM_AGC_MSK) >> IWLAGN_OFDM_AGC_BIT_POS;
871
872 /* Find max rssi among 3 possible receivers.
873 * These values are measured by the digital signal processor (DSP).
874 * They should stay fairly constant even as the signal strength varies,
875 * if the radio's automatic gain control (AGC) is working right.
876 * AGC value (see below) will provide the "interesting" info.
877 */
878 val = le32_to_cpu(ncphy->non_cfg_phy[IWLAGN_RX_RES_RSSI_AB_IDX]);
879 rssi_a = (val & IWLAGN_OFDM_RSSI_INBAND_A_BITMSK) >>
880 IWLAGN_OFDM_RSSI_A_BIT_POS;
881 rssi_b = (val & IWLAGN_OFDM_RSSI_INBAND_B_BITMSK) >>
882 IWLAGN_OFDM_RSSI_B_BIT_POS;
883 val = le32_to_cpu(ncphy->non_cfg_phy[IWLAGN_RX_RES_RSSI_C_IDX]);
884 rssi_c = (val & IWLAGN_OFDM_RSSI_INBAND_C_BITMSK) >>
885 IWLAGN_OFDM_RSSI_C_BIT_POS;
886
887 max_rssi = max_t(u32, rssi_a, rssi_b);
888 max_rssi = max_t(u32, max_rssi, rssi_c);
889
890 IWL_DEBUG_STATS(priv, "Rssi In A %d B %d C %d Max %d AGC dB %d\n",
891 rssi_a, rssi_b, rssi_c, max_rssi, agc);
892
893 /* dBm = max_rssi dB - agc dB - constant.
894 * Higher AGC (higher radio gain) means lower signal. */
895 return max_rssi - agc - IWLAGN_RSSI_OFFSET;
896}
897
898/* Called for REPLY_RX (legacy ABG frames), or
899 * REPLY_RX_MPDU_CMD (HT high-throughput N frames). */
900static int iwlagn_rx_reply_rx(struct iwl_priv *priv,
901 struct iwl_rx_cmd_buffer *rxb,
902 struct iwl_device_cmd *cmd)
903{
904 struct ieee80211_hdr *header;
905 struct ieee80211_rx_status rx_status;
906 struct iwl_rx_packet *pkt = rxb_addr(rxb);
907 struct iwl_rx_phy_res *phy_res;
908 __le32 rx_pkt_status;
909 struct iwl_rx_mpdu_res_start *amsdu;
910 u32 len;
911 u32 ampdu_status;
912 u32 rate_n_flags;
913
914 /**
915 * REPLY_RX and REPLY_RX_MPDU_CMD are handled differently.
916 * REPLY_RX: physical layer info is in this buffer
917 * REPLY_RX_MPDU_CMD: physical layer info was sent in separate
918 * command and cached in priv->last_phy_res
919 *
920 * Here we set up local variables depending on which command is
921 * received.
922 */
923 if (pkt->hdr.cmd == REPLY_RX) {
924 phy_res = (struct iwl_rx_phy_res *)pkt->data;
925 header = (struct ieee80211_hdr *)(pkt->data + sizeof(*phy_res)
926 + phy_res->cfg_phy_cnt);
927
928 len = le16_to_cpu(phy_res->byte_count);
929 rx_pkt_status = *(__le32 *)(pkt->data + sizeof(*phy_res) +
930 phy_res->cfg_phy_cnt + len);
931 ampdu_status = le32_to_cpu(rx_pkt_status);
932 } else {
933 if (!priv->last_phy_res_valid) {
934 IWL_ERR(priv, "MPDU frame without cached PHY data\n");
935 return 0;
936 }
937 phy_res = &priv->last_phy_res;
938 amsdu = (struct iwl_rx_mpdu_res_start *)pkt->data;
939 header = (struct ieee80211_hdr *)(pkt->data + sizeof(*amsdu));
940 len = le16_to_cpu(amsdu->byte_count);
941 rx_pkt_status = *(__le32 *)(pkt->data + sizeof(*amsdu) + len);
942 ampdu_status = iwlagn_translate_rx_status(priv,
943 le32_to_cpu(rx_pkt_status));
944 }
945
946 if ((unlikely(phy_res->cfg_phy_cnt > 20))) {
947 IWL_DEBUG_DROP(priv, "dsp size out of range [0,20]: %d\n",
948 phy_res->cfg_phy_cnt);
949 return 0;
950 }
951
952 if (!(rx_pkt_status & RX_RES_STATUS_NO_CRC32_ERROR) ||
953 !(rx_pkt_status & RX_RES_STATUS_NO_RXE_OVERFLOW)) {
954 IWL_DEBUG_RX(priv, "Bad CRC or FIFO: 0x%08X.\n",
955 le32_to_cpu(rx_pkt_status));
956 return 0;
957 }
958
959 /* This will be used in several places later */
960 rate_n_flags = le32_to_cpu(phy_res->rate_n_flags);
961
962 /* rx_status carries information about the packet to mac80211 */
963 rx_status.mactime = le64_to_cpu(phy_res->timestamp);
964 rx_status.band = (phy_res->phy_flags & RX_RES_PHY_FLAGS_BAND_24_MSK) ?
965 IEEE80211_BAND_2GHZ : IEEE80211_BAND_5GHZ;
966 rx_status.freq =
967 ieee80211_channel_to_frequency(le16_to_cpu(phy_res->channel),
968 rx_status.band);
969 rx_status.rate_idx =
970 iwlagn_hwrate_to_mac80211_idx(rate_n_flags, rx_status.band);
971 rx_status.flag = 0;
972
973 /* TSF isn't reliable. In order to allow smooth user experience,
974 * this W/A doesn't propagate it to the mac80211 */
975 /*rx_status.flag |= RX_FLAG_MACTIME_MPDU;*/
976
977 priv->ucode_beacon_time = le32_to_cpu(phy_res->beacon_time_stamp);
978
979 /* Find max signal strength (dBm) among 3 antenna/receiver chains */
980 rx_status.signal = iwlagn_calc_rssi(priv, phy_res);
981
982 IWL_DEBUG_STATS_LIMIT(priv, "Rssi %d, TSF %llu\n",
983 rx_status.signal, (unsigned long long)rx_status.mactime);
984
985 /*
986 * "antenna number"
987 *
988 * It seems that the antenna field in the phy flags value
989 * is actually a bit field. This is undefined by radiotap,
990 * it wants an actual antenna number but I always get "7"
991 * for most legacy frames I receive indicating that the
992 * same frame was received on all three RX chains.
993 *
994 * I think this field should be removed in favor of a
995 * new 802.11n radiotap field "RX chains" that is defined
996 * as a bitmask.
997 */
998 rx_status.antenna =
999 (le16_to_cpu(phy_res->phy_flags) & RX_RES_PHY_FLAGS_ANTENNA_MSK)
1000 >> RX_RES_PHY_FLAGS_ANTENNA_POS;
1001
1002 /* set the preamble flag if appropriate */
1003 if (phy_res->phy_flags & RX_RES_PHY_FLAGS_SHORT_PREAMBLE_MSK)
1004 rx_status.flag |= RX_FLAG_SHORTPRE;
1005
1006 /* Set up the HT phy flags */
1007 if (rate_n_flags & RATE_MCS_HT_MSK)
1008 rx_status.flag |= RX_FLAG_HT;
1009 if (rate_n_flags & RATE_MCS_HT40_MSK)
1010 rx_status.flag |= RX_FLAG_40MHZ;
1011 if (rate_n_flags & RATE_MCS_SGI_MSK)
1012 rx_status.flag |= RX_FLAG_SHORT_GI;
1013 if (rate_n_flags & RATE_MCS_GF_MSK)
1014 rx_status.flag |= RX_FLAG_HT_GF;
1015
1016 iwlagn_pass_packet_to_mac80211(priv, header, len, ampdu_status,
1017 rxb, &rx_status);
1018 return 0;
1019}
1020
1021static int iwlagn_rx_noa_notification(struct iwl_priv *priv,
1022 struct iwl_rx_cmd_buffer *rxb,
1023 struct iwl_device_cmd *cmd)
1024{
1025 struct iwl_wipan_noa_data *new_data, *old_data;
1026 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1027 struct iwl_wipan_noa_notification *noa_notif = (void *)pkt->data;
1028
1029 /* no condition -- we're in softirq */
1030 old_data = rcu_dereference_protected(priv->noa_data, true);
1031
1032 if (noa_notif->noa_active) {
1033 u32 len = le16_to_cpu(noa_notif->noa_attribute.length);
1034 u32 copylen = len;
1035
1036 /* EID, len, OUI, subtype */
1037 len += 1 + 1 + 3 + 1;
1038 /* P2P id, P2P length */
1039 len += 1 + 2;
1040 copylen += 1 + 2;
1041
1042 new_data = kmalloc(sizeof(*new_data) + len, GFP_ATOMIC);
1043 if (new_data) {
1044 new_data->length = len;
1045 new_data->data[0] = WLAN_EID_VENDOR_SPECIFIC;
1046 new_data->data[1] = len - 2; /* not counting EID, len */
1047 new_data->data[2] = (WLAN_OUI_WFA >> 16) & 0xff;
1048 new_data->data[3] = (WLAN_OUI_WFA >> 8) & 0xff;
1049 new_data->data[4] = (WLAN_OUI_WFA >> 0) & 0xff;
1050 new_data->data[5] = WLAN_OUI_TYPE_WFA_P2P;
1051 memcpy(&new_data->data[6], &noa_notif->noa_attribute,
1052 copylen);
1053 }
1054 } else
1055 new_data = NULL;
1056
1057 rcu_assign_pointer(priv->noa_data, new_data);
1058
1059 if (old_data)
1060 kfree_rcu(old_data, rcu_head);
1061
1062 return 0;
1063}
1064
1065/**
1066 * iwl_setup_rx_handlers - Initialize Rx handler callbacks
1067 *
1068 * Setup the RX handlers for each of the reply types sent from the uCode
1069 * to the host.
1070 */
1071void iwl_setup_rx_handlers(struct iwl_priv *priv)
1072{
1073 int (**handlers)(struct iwl_priv *priv, struct iwl_rx_cmd_buffer *rxb,
1074 struct iwl_device_cmd *cmd);
1075
1076 handlers = priv->rx_handlers;
1077
1078 handlers[REPLY_ERROR] = iwlagn_rx_reply_error;
1079 handlers[CHANNEL_SWITCH_NOTIFICATION] = iwlagn_rx_csa;
1080 handlers[SPECTRUM_MEASURE_NOTIFICATION] =
1081 iwlagn_rx_spectrum_measure_notif;
1082 handlers[PM_SLEEP_NOTIFICATION] = iwlagn_rx_pm_sleep_notif;
1083 handlers[PM_DEBUG_STATISTIC_NOTIFIC] =
1084 iwlagn_rx_pm_debug_statistics_notif;
1085 handlers[BEACON_NOTIFICATION] = iwlagn_rx_beacon_notif;
1086 handlers[REPLY_ADD_STA] = iwl_add_sta_callback;
1087
1088 handlers[REPLY_WIPAN_NOA_NOTIFICATION] = iwlagn_rx_noa_notification;
1089
1090 /*
1091 * The same handler is used for both the REPLY to a discrete
1092 * statistics request from the host as well as for the periodic
1093 * statistics notifications (after received beacons) from the uCode.
1094 */
1095 handlers[REPLY_STATISTICS_CMD] = iwlagn_rx_reply_statistics;
1096 handlers[STATISTICS_NOTIFICATION] = iwlagn_rx_statistics;
1097
1098 iwl_setup_rx_scan_handlers(priv);
1099
1100 handlers[CARD_STATE_NOTIFICATION] = iwlagn_rx_card_state_notif;
1101 handlers[MISSED_BEACONS_NOTIFICATION] =
1102 iwlagn_rx_missed_beacon_notif;
1103
1104 /* Rx handlers */
1105 handlers[REPLY_RX_PHY_CMD] = iwlagn_rx_reply_rx_phy;
1106 handlers[REPLY_RX_MPDU_CMD] = iwlagn_rx_reply_rx;
1107
1108 /* block ack */
1109 handlers[REPLY_COMPRESSED_BA] =
1110 iwlagn_rx_reply_compressed_ba;
1111
1112 priv->rx_handlers[REPLY_TX] = iwlagn_rx_reply_tx;
1113
1114 /* set up notification wait support */
1115 iwl_notification_wait_init(&priv->notif_wait);
1116
1117 /* Set up BT Rx handlers */
1118 if (priv->cfg->bt_params)
1119 iwlagn_bt_rx_handler_setup(priv);
1120}
1121
1122int iwl_rx_dispatch(struct iwl_op_mode *op_mode, struct iwl_rx_cmd_buffer *rxb,
1123 struct iwl_device_cmd *cmd)
1124{
1125 struct iwl_rx_packet *pkt = rxb_addr(rxb);
1126 struct iwl_priv *priv = IWL_OP_MODE_GET_DVM(op_mode);
1127 void (*pre_rx_handler)(struct iwl_priv *,
1128 struct iwl_rx_cmd_buffer *);
1129 int err = 0;
1130
1131 /*
1132 * Do the notification wait before RX handlers so
1133 * even if the RX handler consumes the RXB we have
1134 * access to it in the notification wait entry.
1135 */
1136 iwl_notification_wait_notify(&priv->notif_wait, pkt);
1137
1138 /* RX data may be forwarded to userspace (using pre_rx_handler) in one
1139 * of two cases: the first, that the user owns the uCode through
1140 * testmode - in such case the pre_rx_handler is set and no further
1141 * processing takes place. The other case is when the user want to
1142 * monitor the rx w/o affecting the regular flow - the pre_rx_handler
1143 * will be set but the ownership flag != IWL_OWNERSHIP_TM and the flow
1144 * continues.
1145 * We need to use ACCESS_ONCE to prevent a case where the handler
1146 * changes between the check and the call.
1147 */
1148 pre_rx_handler = ACCESS_ONCE(priv->pre_rx_handler);
1149 if (pre_rx_handler)
1150 pre_rx_handler(priv, rxb);
1151 if (priv->ucode_owner != IWL_OWNERSHIP_TM) {
1152 /* Based on type of command response or notification,
1153 * handle those that need handling via function in
1154 * rx_handlers table. See iwl_setup_rx_handlers() */
1155 if (priv->rx_handlers[pkt->hdr.cmd]) {
1156 priv->rx_handlers_stats[pkt->hdr.cmd]++;
1157 err = priv->rx_handlers[pkt->hdr.cmd] (priv, rxb, cmd);
1158 } else {
1159 /* No handling needed */
1160 IWL_DEBUG_RX(priv, "No handler needed for %s, 0x%02x\n",
1161 iwl_dvm_get_cmd_string(pkt->hdr.cmd),
1162 pkt->hdr.cmd);
1163 }
1164 }
1165 return err;
1166}
generated by cgit v1.2.2 (git 2.25.0) at 2025-01-30 12:11:22 -0500