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e04ed0a5 WYG |
1 | /****************************************************************************** |
2 | * | |
3 | * GPL LICENSE SUMMARY | |
4 | * | |
5 | * Copyright(c) 2008 - 2010 Intel Corporation. All rights reserved. | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of version 2 of the GNU General Public License as | |
9 | * published by the Free Software Foundation. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, but | |
12 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | * General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, write to the Free Software | |
18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110, | |
19 | * USA | |
20 | * | |
21 | * The full GNU General Public License is included in this distribution | |
22 | * in the file called LICENSE.GPL. | |
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 | *****************************************************************************/ | |
8d801080 | 29 | #include <linux/etherdevice.h> |
e04ed0a5 WYG |
30 | #include <linux/kernel.h> |
31 | #include <linux/module.h> | |
32 | #include <linux/init.h> | |
33 | #include <linux/sched.h> | |
34 | ||
35 | #include "iwl-dev.h" | |
36 | #include "iwl-core.h" | |
37 | #include "iwl-io.h" | |
38 | #include "iwl-helpers.h" | |
39 | #include "iwl-agn-hw.h" | |
40 | #include "iwl-agn.h" | |
1fa61b2e | 41 | #include "iwl-sta.h" |
e04ed0a5 WYG |
42 | |
43 | static inline u32 iwlagn_get_scd_ssn(struct iwl5000_tx_resp *tx_resp) | |
44 | { | |
45 | return le32_to_cpup((__le32 *)&tx_resp->status + | |
46 | tx_resp->frame_count) & MAX_SN; | |
47 | } | |
48 | ||
49 | static int iwlagn_tx_status_reply_tx(struct iwl_priv *priv, | |
50 | struct iwl_ht_agg *agg, | |
51 | struct iwl5000_tx_resp *tx_resp, | |
52 | int txq_id, u16 start_idx) | |
53 | { | |
54 | u16 status; | |
55 | struct agg_tx_status *frame_status = &tx_resp->status; | |
56 | struct ieee80211_tx_info *info = NULL; | |
57 | struct ieee80211_hdr *hdr = NULL; | |
58 | u32 rate_n_flags = le32_to_cpu(tx_resp->rate_n_flags); | |
59 | int i, sh, idx; | |
60 | u16 seq; | |
61 | ||
62 | if (agg->wait_for_ba) | |
63 | IWL_DEBUG_TX_REPLY(priv, "got tx response w/o block-ack\n"); | |
64 | ||
65 | agg->frame_count = tx_resp->frame_count; | |
66 | agg->start_idx = start_idx; | |
67 | agg->rate_n_flags = rate_n_flags; | |
68 | agg->bitmap = 0; | |
69 | ||
70 | /* # frames attempted by Tx command */ | |
71 | if (agg->frame_count == 1) { | |
72 | /* Only one frame was attempted; no block-ack will arrive */ | |
73 | status = le16_to_cpu(frame_status[0].status); | |
74 | idx = start_idx; | |
75 | ||
76 | /* FIXME: code repetition */ | |
77 | IWL_DEBUG_TX_REPLY(priv, "FrameCnt = %d, StartIdx=%d idx=%d\n", | |
78 | agg->frame_count, agg->start_idx, idx); | |
79 | ||
80 | info = IEEE80211_SKB_CB(priv->txq[txq_id].txb[idx].skb[0]); | |
81 | info->status.rates[0].count = tx_resp->failure_frame + 1; | |
82 | info->flags &= ~IEEE80211_TX_CTL_AMPDU; | |
83 | info->flags |= iwl_tx_status_to_mac80211(status); | |
8d801080 | 84 | iwlagn_hwrate_to_tx_control(priv, rate_n_flags, info); |
e04ed0a5 WYG |
85 | |
86 | /* FIXME: code repetition end */ | |
87 | ||
88 | IWL_DEBUG_TX_REPLY(priv, "1 Frame 0x%x failure :%d\n", | |
89 | status & 0xff, tx_resp->failure_frame); | |
90 | IWL_DEBUG_TX_REPLY(priv, "Rate Info rate_n_flags=%x\n", rate_n_flags); | |
91 | ||
92 | agg->wait_for_ba = 0; | |
93 | } else { | |
94 | /* Two or more frames were attempted; expect block-ack */ | |
95 | u64 bitmap = 0; | |
96 | int start = agg->start_idx; | |
97 | ||
98 | /* Construct bit-map of pending frames within Tx window */ | |
99 | for (i = 0; i < agg->frame_count; i++) { | |
100 | u16 sc; | |
101 | status = le16_to_cpu(frame_status[i].status); | |
102 | seq = le16_to_cpu(frame_status[i].sequence); | |
103 | idx = SEQ_TO_INDEX(seq); | |
104 | txq_id = SEQ_TO_QUEUE(seq); | |
105 | ||
106 | if (status & (AGG_TX_STATE_FEW_BYTES_MSK | | |
107 | AGG_TX_STATE_ABORT_MSK)) | |
108 | continue; | |
109 | ||
110 | IWL_DEBUG_TX_REPLY(priv, "FrameCnt = %d, txq_id=%d idx=%d\n", | |
111 | agg->frame_count, txq_id, idx); | |
112 | ||
113 | hdr = iwl_tx_queue_get_hdr(priv, txq_id, idx); | |
114 | if (!hdr) { | |
115 | IWL_ERR(priv, | |
116 | "BUG_ON idx doesn't point to valid skb" | |
117 | " idx=%d, txq_id=%d\n", idx, txq_id); | |
118 | return -1; | |
119 | } | |
120 | ||
121 | sc = le16_to_cpu(hdr->seq_ctrl); | |
122 | if (idx != (SEQ_TO_SN(sc) & 0xff)) { | |
123 | IWL_ERR(priv, | |
124 | "BUG_ON idx doesn't match seq control" | |
125 | " idx=%d, seq_idx=%d, seq=%d\n", | |
126 | idx, SEQ_TO_SN(sc), | |
127 | hdr->seq_ctrl); | |
128 | return -1; | |
129 | } | |
130 | ||
131 | IWL_DEBUG_TX_REPLY(priv, "AGG Frame i=%d idx %d seq=%d\n", | |
132 | i, idx, SEQ_TO_SN(sc)); | |
133 | ||
134 | sh = idx - start; | |
135 | if (sh > 64) { | |
136 | sh = (start - idx) + 0xff; | |
137 | bitmap = bitmap << sh; | |
138 | sh = 0; | |
139 | start = idx; | |
140 | } else if (sh < -64) | |
141 | sh = 0xff - (start - idx); | |
142 | else if (sh < 0) { | |
143 | sh = start - idx; | |
144 | start = idx; | |
145 | bitmap = bitmap << sh; | |
146 | sh = 0; | |
147 | } | |
148 | bitmap |= 1ULL << sh; | |
149 | IWL_DEBUG_TX_REPLY(priv, "start=%d bitmap=0x%llx\n", | |
150 | start, (unsigned long long)bitmap); | |
151 | } | |
152 | ||
153 | agg->bitmap = bitmap; | |
154 | agg->start_idx = start; | |
155 | IWL_DEBUG_TX_REPLY(priv, "Frames %d start_idx=%d bitmap=0x%llx\n", | |
156 | agg->frame_count, agg->start_idx, | |
157 | (unsigned long long)agg->bitmap); | |
158 | ||
159 | if (bitmap) | |
160 | agg->wait_for_ba = 1; | |
161 | } | |
162 | return 0; | |
163 | } | |
164 | ||
04569cbe WYG |
165 | void iwl_check_abort_status(struct iwl_priv *priv, |
166 | u8 frame_count, u32 status) | |
167 | { | |
168 | if (frame_count == 1 && status == TX_STATUS_FAIL_RFKILL_FLUSH) { | |
169 | IWL_ERR(priv, "TODO: Implement Tx flush command!!!\n"); | |
170 | } | |
171 | } | |
172 | ||
e04ed0a5 WYG |
173 | static void iwlagn_rx_reply_tx(struct iwl_priv *priv, |
174 | struct iwl_rx_mem_buffer *rxb) | |
175 | { | |
176 | struct iwl_rx_packet *pkt = rxb_addr(rxb); | |
177 | u16 sequence = le16_to_cpu(pkt->hdr.sequence); | |
178 | int txq_id = SEQ_TO_QUEUE(sequence); | |
179 | int index = SEQ_TO_INDEX(sequence); | |
180 | struct iwl_tx_queue *txq = &priv->txq[txq_id]; | |
181 | struct ieee80211_tx_info *info; | |
182 | struct iwl5000_tx_resp *tx_resp = (void *)&pkt->u.raw[0]; | |
183 | u32 status = le16_to_cpu(tx_resp->status.status); | |
184 | int tid; | |
185 | int sta_id; | |
186 | int freed; | |
9c5ac091 | 187 | unsigned long flags; |
e04ed0a5 WYG |
188 | |
189 | if ((index >= txq->q.n_bd) || (iwl_queue_used(&txq->q, index) == 0)) { | |
190 | IWL_ERR(priv, "Read index for DMA queue txq_id (%d) index %d " | |
191 | "is out of range [0-%d] %d %d\n", txq_id, | |
192 | index, txq->q.n_bd, txq->q.write_ptr, | |
193 | txq->q.read_ptr); | |
194 | return; | |
195 | } | |
196 | ||
197 | info = IEEE80211_SKB_CB(txq->txb[txq->q.read_ptr].skb[0]); | |
198 | memset(&info->status, 0, sizeof(info->status)); | |
199 | ||
200 | tid = (tx_resp->ra_tid & IWL50_TX_RES_TID_MSK) >> IWL50_TX_RES_TID_POS; | |
201 | sta_id = (tx_resp->ra_tid & IWL50_TX_RES_RA_MSK) >> IWL50_TX_RES_RA_POS; | |
202 | ||
9c5ac091 | 203 | spin_lock_irqsave(&priv->sta_lock, flags); |
e04ed0a5 WYG |
204 | if (txq->sched_retry) { |
205 | const u32 scd_ssn = iwlagn_get_scd_ssn(tx_resp); | |
9c5ac091 | 206 | struct iwl_ht_agg *agg; |
e04ed0a5 WYG |
207 | |
208 | agg = &priv->stations[sta_id].tid[tid].agg; | |
209 | ||
210 | iwlagn_tx_status_reply_tx(priv, agg, tx_resp, txq_id, index); | |
211 | ||
212 | /* check if BAR is needed */ | |
213 | if ((tx_resp->frame_count == 1) && !iwl_is_tx_success(status)) | |
214 | info->flags |= IEEE80211_TX_STAT_AMPDU_NO_BACK; | |
215 | ||
216 | if (txq->q.read_ptr != (scd_ssn & 0xff)) { | |
217 | index = iwl_queue_dec_wrap(scd_ssn & 0xff, txq->q.n_bd); | |
218 | IWL_DEBUG_TX_REPLY(priv, "Retry scheduler reclaim " | |
219 | "scd_ssn=%d idx=%d txq=%d swq=%d\n", | |
220 | scd_ssn , index, txq_id, txq->swq_id); | |
221 | ||
74bcdb33 | 222 | freed = iwlagn_tx_queue_reclaim(priv, txq_id, index); |
e04ed0a5 WYG |
223 | iwl_free_tfds_in_queue(priv, sta_id, tid, freed); |
224 | ||
225 | if (priv->mac80211_registered && | |
226 | (iwl_queue_space(&txq->q) > txq->q.low_mark) && | |
227 | (agg->state != IWL_EMPTYING_HW_QUEUE_DELBA)) { | |
228 | if (agg->state == IWL_AGG_OFF) | |
229 | iwl_wake_queue(priv, txq_id); | |
230 | else | |
231 | iwl_wake_queue(priv, txq->swq_id); | |
232 | } | |
233 | } | |
234 | } else { | |
235 | BUG_ON(txq_id != txq->swq_id); | |
236 | ||
237 | info->status.rates[0].count = tx_resp->failure_frame + 1; | |
238 | info->flags |= iwl_tx_status_to_mac80211(status); | |
8d801080 | 239 | iwlagn_hwrate_to_tx_control(priv, |
e04ed0a5 WYG |
240 | le32_to_cpu(tx_resp->rate_n_flags), |
241 | info); | |
242 | ||
243 | IWL_DEBUG_TX_REPLY(priv, "TXQ %d status %s (0x%08x) rate_n_flags " | |
244 | "0x%x retries %d\n", | |
245 | txq_id, | |
246 | iwl_get_tx_fail_reason(status), status, | |
247 | le32_to_cpu(tx_resp->rate_n_flags), | |
248 | tx_resp->failure_frame); | |
249 | ||
74bcdb33 | 250 | freed = iwlagn_tx_queue_reclaim(priv, txq_id, index); |
e04ed0a5 WYG |
251 | iwl_free_tfds_in_queue(priv, sta_id, tid, freed); |
252 | ||
253 | if (priv->mac80211_registered && | |
254 | (iwl_queue_space(&txq->q) > txq->q.low_mark)) | |
255 | iwl_wake_queue(priv, txq_id); | |
256 | } | |
257 | ||
74bcdb33 | 258 | iwlagn_txq_check_empty(priv, sta_id, tid, txq_id); |
e04ed0a5 | 259 | |
04569cbe | 260 | iwl_check_abort_status(priv, tx_resp->frame_count, status); |
9c5ac091 | 261 | spin_unlock_irqrestore(&priv->sta_lock, flags); |
e04ed0a5 WYG |
262 | } |
263 | ||
264 | void iwlagn_rx_handler_setup(struct iwl_priv *priv) | |
265 | { | |
266 | /* init calibration handlers */ | |
267 | priv->rx_handlers[CALIBRATION_RES_NOTIFICATION] = | |
268 | iwlagn_rx_calib_result; | |
269 | priv->rx_handlers[CALIBRATION_COMPLETE_NOTIFICATION] = | |
270 | iwlagn_rx_calib_complete; | |
271 | priv->rx_handlers[REPLY_TX] = iwlagn_rx_reply_tx; | |
272 | } | |
273 | ||
274 | void iwlagn_setup_deferred_work(struct iwl_priv *priv) | |
275 | { | |
276 | /* in agn, the tx power calibration is done in uCode */ | |
277 | priv->disable_tx_power_cal = 1; | |
278 | } | |
279 | ||
280 | int iwlagn_hw_valid_rtc_data_addr(u32 addr) | |
281 | { | |
282 | return (addr >= IWLAGN_RTC_DATA_LOWER_BOUND) && | |
283 | (addr < IWLAGN_RTC_DATA_UPPER_BOUND); | |
284 | } | |
285 | ||
286 | int iwlagn_send_tx_power(struct iwl_priv *priv) | |
287 | { | |
288 | struct iwl5000_tx_power_dbm_cmd tx_power_cmd; | |
289 | u8 tx_ant_cfg_cmd; | |
290 | ||
291 | /* half dBm need to multiply */ | |
292 | tx_power_cmd.global_lmt = (s8)(2 * priv->tx_power_user_lmt); | |
293 | ||
294 | if (priv->tx_power_lmt_in_half_dbm && | |
295 | priv->tx_power_lmt_in_half_dbm < tx_power_cmd.global_lmt) { | |
296 | /* | |
297 | * For the newer devices which using enhanced/extend tx power | |
298 | * table in EEPROM, the format is in half dBm. driver need to | |
299 | * convert to dBm format before report to mac80211. | |
300 | * By doing so, there is a possibility of 1/2 dBm resolution | |
301 | * lost. driver will perform "round-up" operation before | |
302 | * reporting, but it will cause 1/2 dBm tx power over the | |
303 | * regulatory limit. Perform the checking here, if the | |
304 | * "tx_power_user_lmt" is higher than EEPROM value (in | |
305 | * half-dBm format), lower the tx power based on EEPROM | |
306 | */ | |
307 | tx_power_cmd.global_lmt = priv->tx_power_lmt_in_half_dbm; | |
308 | } | |
309 | tx_power_cmd.flags = IWL50_TX_POWER_NO_CLOSED; | |
310 | tx_power_cmd.srv_chan_lmt = IWL50_TX_POWER_AUTO; | |
311 | ||
312 | if (IWL_UCODE_API(priv->ucode_ver) == 1) | |
313 | tx_ant_cfg_cmd = REPLY_TX_POWER_DBM_CMD_V1; | |
314 | else | |
315 | tx_ant_cfg_cmd = REPLY_TX_POWER_DBM_CMD; | |
316 | ||
317 | return iwl_send_cmd_pdu_async(priv, tx_ant_cfg_cmd, | |
318 | sizeof(tx_power_cmd), &tx_power_cmd, | |
319 | NULL); | |
320 | } | |
321 | ||
322 | void iwlagn_temperature(struct iwl_priv *priv) | |
323 | { | |
324 | /* store temperature from statistics (in Celsius) */ | |
2daf6c15 | 325 | priv->temperature = le32_to_cpu(priv->statistics.general.temperature); |
e04ed0a5 WYG |
326 | iwl_tt_handler(priv); |
327 | } | |
328 | ||
329 | u16 iwlagn_eeprom_calib_version(struct iwl_priv *priv) | |
330 | { | |
331 | struct iwl_eeprom_calib_hdr { | |
332 | u8 version; | |
333 | u8 pa_type; | |
334 | u16 voltage; | |
335 | } *hdr; | |
336 | ||
337 | hdr = (struct iwl_eeprom_calib_hdr *)iwl_eeprom_query_addr(priv, | |
7944f8e4 | 338 | EEPROM_CALIB_ALL); |
e04ed0a5 WYG |
339 | return hdr->version; |
340 | ||
341 | } | |
342 | ||
343 | /* | |
344 | * EEPROM | |
345 | */ | |
346 | static u32 eeprom_indirect_address(const struct iwl_priv *priv, u32 address) | |
347 | { | |
348 | u16 offset = 0; | |
349 | ||
350 | if ((address & INDIRECT_ADDRESS) == 0) | |
351 | return address; | |
352 | ||
353 | switch (address & INDIRECT_TYPE_MSK) { | |
354 | case INDIRECT_HOST: | |
7944f8e4 | 355 | offset = iwl_eeprom_query16(priv, EEPROM_LINK_HOST); |
e04ed0a5 WYG |
356 | break; |
357 | case INDIRECT_GENERAL: | |
7944f8e4 | 358 | offset = iwl_eeprom_query16(priv, EEPROM_LINK_GENERAL); |
e04ed0a5 WYG |
359 | break; |
360 | case INDIRECT_REGULATORY: | |
7944f8e4 | 361 | offset = iwl_eeprom_query16(priv, EEPROM_LINK_REGULATORY); |
e04ed0a5 WYG |
362 | break; |
363 | case INDIRECT_CALIBRATION: | |
7944f8e4 | 364 | offset = iwl_eeprom_query16(priv, EEPROM_LINK_CALIBRATION); |
e04ed0a5 WYG |
365 | break; |
366 | case INDIRECT_PROCESS_ADJST: | |
7944f8e4 | 367 | offset = iwl_eeprom_query16(priv, EEPROM_LINK_PROCESS_ADJST); |
e04ed0a5 WYG |
368 | break; |
369 | case INDIRECT_OTHERS: | |
7944f8e4 | 370 | offset = iwl_eeprom_query16(priv, EEPROM_LINK_OTHERS); |
e04ed0a5 WYG |
371 | break; |
372 | default: | |
373 | IWL_ERR(priv, "illegal indirect type: 0x%X\n", | |
374 | address & INDIRECT_TYPE_MSK); | |
375 | break; | |
376 | } | |
377 | ||
378 | /* translate the offset from words to byte */ | |
379 | return (address & ADDRESS_MSK) + (offset << 1); | |
380 | } | |
381 | ||
382 | const u8 *iwlagn_eeprom_query_addr(const struct iwl_priv *priv, | |
383 | size_t offset) | |
384 | { | |
385 | u32 address = eeprom_indirect_address(priv, offset); | |
386 | BUG_ON(address >= priv->cfg->eeprom_size); | |
387 | return &priv->eeprom[address]; | |
388 | } | |
348ee7cd WYG |
389 | |
390 | struct iwl_mod_params iwlagn_mod_params = { | |
391 | .amsdu_size_8K = 1, | |
392 | .restart_fw = 1, | |
393 | /* the rest are 0 by default */ | |
394 | }; | |
74bcdb33 WYG |
395 | |
396 | void iwlagn_rx_queue_reset(struct iwl_priv *priv, struct iwl_rx_queue *rxq) | |
397 | { | |
398 | unsigned long flags; | |
399 | int i; | |
400 | spin_lock_irqsave(&rxq->lock, flags); | |
401 | INIT_LIST_HEAD(&rxq->rx_free); | |
402 | INIT_LIST_HEAD(&rxq->rx_used); | |
403 | /* Fill the rx_used queue with _all_ of the Rx buffers */ | |
404 | for (i = 0; i < RX_FREE_BUFFERS + RX_QUEUE_SIZE; i++) { | |
405 | /* In the reset function, these buffers may have been allocated | |
406 | * to an SKB, so we need to unmap and free potential storage */ | |
407 | if (rxq->pool[i].page != NULL) { | |
408 | pci_unmap_page(priv->pci_dev, rxq->pool[i].page_dma, | |
409 | PAGE_SIZE << priv->hw_params.rx_page_order, | |
410 | PCI_DMA_FROMDEVICE); | |
411 | __iwl_free_pages(priv, rxq->pool[i].page); | |
412 | rxq->pool[i].page = NULL; | |
413 | } | |
414 | list_add_tail(&rxq->pool[i].list, &rxq->rx_used); | |
415 | } | |
416 | ||
6aac74b4 ZY |
417 | for (i = 0; i < RX_QUEUE_SIZE; i++) |
418 | rxq->queue[i] = NULL; | |
419 | ||
74bcdb33 WYG |
420 | /* Set us so that we have processed and used all buffers, but have |
421 | * not restocked the Rx queue with fresh buffers */ | |
422 | rxq->read = rxq->write = 0; | |
423 | rxq->write_actual = 0; | |
424 | rxq->free_count = 0; | |
425 | spin_unlock_irqrestore(&rxq->lock, flags); | |
426 | } | |
427 | ||
428 | int iwlagn_rx_init(struct iwl_priv *priv, struct iwl_rx_queue *rxq) | |
429 | { | |
430 | u32 rb_size; | |
431 | const u32 rfdnlog = RX_QUEUE_SIZE_LOG; /* 256 RBDs */ | |
432 | u32 rb_timeout = 0; /* FIXME: RX_RB_TIMEOUT for all devices? */ | |
433 | ||
434 | if (!priv->cfg->use_isr_legacy) | |
435 | rb_timeout = RX_RB_TIMEOUT; | |
436 | ||
437 | if (priv->cfg->mod_params->amsdu_size_8K) | |
438 | rb_size = FH_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_8K; | |
439 | else | |
440 | rb_size = FH_RCSR_RX_CONFIG_REG_VAL_RB_SIZE_4K; | |
441 | ||
442 | /* Stop Rx DMA */ | |
443 | iwl_write_direct32(priv, FH_MEM_RCSR_CHNL0_CONFIG_REG, 0); | |
444 | ||
445 | /* Reset driver's Rx queue write index */ | |
446 | iwl_write_direct32(priv, FH_RSCSR_CHNL0_RBDCB_WPTR_REG, 0); | |
447 | ||
448 | /* Tell device where to find RBD circular buffer in DRAM */ | |
449 | iwl_write_direct32(priv, FH_RSCSR_CHNL0_RBDCB_BASE_REG, | |
450 | (u32)(rxq->dma_addr >> 8)); | |
451 | ||
452 | /* Tell device where in DRAM to update its Rx status */ | |
453 | iwl_write_direct32(priv, FH_RSCSR_CHNL0_STTS_WPTR_REG, | |
454 | rxq->rb_stts_dma >> 4); | |
455 | ||
456 | /* Enable Rx DMA | |
457 | * FH_RCSR_CHNL0_RX_IGNORE_RXF_EMPTY is set because of HW bug in | |
458 | * the credit mechanism in 5000 HW RX FIFO | |
459 | * Direct rx interrupts to hosts | |
460 | * Rx buffer size 4 or 8k | |
461 | * RB timeout 0x10 | |
462 | * 256 RBDs | |
463 | */ | |
464 | iwl_write_direct32(priv, FH_MEM_RCSR_CHNL0_CONFIG_REG, | |
465 | FH_RCSR_RX_CONFIG_CHNL_EN_ENABLE_VAL | | |
466 | FH_RCSR_CHNL0_RX_IGNORE_RXF_EMPTY | | |
467 | FH_RCSR_CHNL0_RX_CONFIG_IRQ_DEST_INT_HOST_VAL | | |
468 | FH_RCSR_CHNL0_RX_CONFIG_SINGLE_FRAME_MSK | | |
469 | rb_size| | |
470 | (rb_timeout << FH_RCSR_RX_CONFIG_REG_IRQ_RBTH_POS)| | |
471 | (rfdnlog << FH_RCSR_RX_CONFIG_RBDCB_SIZE_POS)); | |
472 | ||
473 | /* Set interrupt coalescing timer to default (2048 usecs) */ | |
474 | iwl_write8(priv, CSR_INT_COALESCING, IWL_HOST_INT_TIMEOUT_DEF); | |
475 | ||
476 | return 0; | |
477 | } | |
478 | ||
479 | int iwlagn_hw_nic_init(struct iwl_priv *priv) | |
480 | { | |
481 | unsigned long flags; | |
482 | struct iwl_rx_queue *rxq = &priv->rxq; | |
483 | int ret; | |
484 | ||
485 | /* nic_init */ | |
486 | spin_lock_irqsave(&priv->lock, flags); | |
487 | priv->cfg->ops->lib->apm_ops.init(priv); | |
488 | ||
489 | /* Set interrupt coalescing calibration timer to default (512 usecs) */ | |
490 | iwl_write8(priv, CSR_INT_COALESCING, IWL_HOST_INT_CALIB_TIMEOUT_DEF); | |
491 | ||
492 | spin_unlock_irqrestore(&priv->lock, flags); | |
493 | ||
494 | ret = priv->cfg->ops->lib->apm_ops.set_pwr_src(priv, IWL_PWR_SRC_VMAIN); | |
495 | ||
496 | priv->cfg->ops->lib->apm_ops.config(priv); | |
497 | ||
498 | /* Allocate the RX queue, or reset if it is already allocated */ | |
499 | if (!rxq->bd) { | |
500 | ret = iwl_rx_queue_alloc(priv); | |
501 | if (ret) { | |
502 | IWL_ERR(priv, "Unable to initialize Rx queue\n"); | |
503 | return -ENOMEM; | |
504 | } | |
505 | } else | |
506 | iwlagn_rx_queue_reset(priv, rxq); | |
507 | ||
54b81550 | 508 | iwlagn_rx_replenish(priv); |
74bcdb33 WYG |
509 | |
510 | iwlagn_rx_init(priv, rxq); | |
511 | ||
512 | spin_lock_irqsave(&priv->lock, flags); | |
513 | ||
514 | rxq->need_update = 1; | |
515 | iwl_rx_queue_update_write_ptr(priv, rxq); | |
516 | ||
517 | spin_unlock_irqrestore(&priv->lock, flags); | |
518 | ||
470058e0 ZY |
519 | /* Allocate or reset and init all Tx and Command queues */ |
520 | if (!priv->txq) { | |
521 | ret = iwlagn_txq_ctx_alloc(priv); | |
522 | if (ret) | |
523 | return ret; | |
524 | } else | |
525 | iwlagn_txq_ctx_reset(priv); | |
74bcdb33 WYG |
526 | |
527 | set_bit(STATUS_INIT, &priv->status); | |
528 | ||
529 | return 0; | |
530 | } | |
54b81550 WYG |
531 | |
532 | /** | |
533 | * iwlagn_dma_addr2rbd_ptr - convert a DMA address to a uCode read buffer ptr | |
534 | */ | |
535 | static inline __le32 iwlagn_dma_addr2rbd_ptr(struct iwl_priv *priv, | |
536 | dma_addr_t dma_addr) | |
537 | { | |
538 | return cpu_to_le32((u32)(dma_addr >> 8)); | |
539 | } | |
540 | ||
541 | /** | |
542 | * iwlagn_rx_queue_restock - refill RX queue from pre-allocated pool | |
543 | * | |
544 | * If there are slots in the RX queue that need to be restocked, | |
545 | * and we have free pre-allocated buffers, fill the ranks as much | |
546 | * as we can, pulling from rx_free. | |
547 | * | |
548 | * This moves the 'write' index forward to catch up with 'processed', and | |
549 | * also updates the memory address in the firmware to reference the new | |
550 | * target buffer. | |
551 | */ | |
552 | void iwlagn_rx_queue_restock(struct iwl_priv *priv) | |
553 | { | |
554 | struct iwl_rx_queue *rxq = &priv->rxq; | |
555 | struct list_head *element; | |
556 | struct iwl_rx_mem_buffer *rxb; | |
557 | unsigned long flags; | |
54b81550 WYG |
558 | |
559 | spin_lock_irqsave(&rxq->lock, flags); | |
54b81550 | 560 | while ((iwl_rx_queue_space(rxq) > 0) && (rxq->free_count)) { |
6aac74b4 ZY |
561 | /* The overwritten rxb must be a used one */ |
562 | rxb = rxq->queue[rxq->write]; | |
563 | BUG_ON(rxb && rxb->page); | |
564 | ||
54b81550 WYG |
565 | /* Get next free Rx buffer, remove from free list */ |
566 | element = rxq->rx_free.next; | |
567 | rxb = list_entry(element, struct iwl_rx_mem_buffer, list); | |
568 | list_del(element); | |
569 | ||
570 | /* Point to Rx buffer via next RBD in circular buffer */ | |
571 | rxq->bd[rxq->write] = iwlagn_dma_addr2rbd_ptr(priv, | |
572 | rxb->page_dma); | |
573 | rxq->queue[rxq->write] = rxb; | |
574 | rxq->write = (rxq->write + 1) & RX_QUEUE_MASK; | |
575 | rxq->free_count--; | |
576 | } | |
577 | spin_unlock_irqrestore(&rxq->lock, flags); | |
578 | /* If the pre-allocated buffer pool is dropping low, schedule to | |
579 | * refill it */ | |
580 | if (rxq->free_count <= RX_LOW_WATERMARK) | |
581 | queue_work(priv->workqueue, &priv->rx_replenish); | |
582 | ||
583 | ||
584 | /* If we've added more space for the firmware to place data, tell it. | |
585 | * Increment device's write pointer in multiples of 8. */ | |
586 | if (rxq->write_actual != (rxq->write & ~0x7)) { | |
587 | spin_lock_irqsave(&rxq->lock, flags); | |
588 | rxq->need_update = 1; | |
589 | spin_unlock_irqrestore(&rxq->lock, flags); | |
590 | iwl_rx_queue_update_write_ptr(priv, rxq); | |
591 | } | |
592 | } | |
593 | ||
594 | /** | |
595 | * iwlagn_rx_replenish - Move all used packet from rx_used to rx_free | |
596 | * | |
597 | * When moving to rx_free an SKB is allocated for the slot. | |
598 | * | |
599 | * Also restock the Rx queue via iwl_rx_queue_restock. | |
600 | * This is called as a scheduled work item (except for during initialization) | |
601 | */ | |
602 | void iwlagn_rx_allocate(struct iwl_priv *priv, gfp_t priority) | |
603 | { | |
604 | struct iwl_rx_queue *rxq = &priv->rxq; | |
605 | struct list_head *element; | |
606 | struct iwl_rx_mem_buffer *rxb; | |
607 | struct page *page; | |
608 | unsigned long flags; | |
609 | gfp_t gfp_mask = priority; | |
610 | ||
611 | while (1) { | |
612 | spin_lock_irqsave(&rxq->lock, flags); | |
613 | if (list_empty(&rxq->rx_used)) { | |
614 | spin_unlock_irqrestore(&rxq->lock, flags); | |
615 | return; | |
616 | } | |
617 | spin_unlock_irqrestore(&rxq->lock, flags); | |
618 | ||
619 | if (rxq->free_count > RX_LOW_WATERMARK) | |
620 | gfp_mask |= __GFP_NOWARN; | |
621 | ||
622 | if (priv->hw_params.rx_page_order > 0) | |
623 | gfp_mask |= __GFP_COMP; | |
624 | ||
625 | /* Alloc a new receive buffer */ | |
626 | page = alloc_pages(gfp_mask, priv->hw_params.rx_page_order); | |
627 | if (!page) { | |
628 | if (net_ratelimit()) | |
629 | IWL_DEBUG_INFO(priv, "alloc_pages failed, " | |
630 | "order: %d\n", | |
631 | priv->hw_params.rx_page_order); | |
632 | ||
633 | if ((rxq->free_count <= RX_LOW_WATERMARK) && | |
634 | net_ratelimit()) | |
635 | IWL_CRIT(priv, "Failed to alloc_pages with %s. Only %u free buffers remaining.\n", | |
636 | priority == GFP_ATOMIC ? "GFP_ATOMIC" : "GFP_KERNEL", | |
637 | rxq->free_count); | |
638 | /* We don't reschedule replenish work here -- we will | |
639 | * call the restock method and if it still needs | |
640 | * more buffers it will schedule replenish */ | |
641 | return; | |
642 | } | |
643 | ||
644 | spin_lock_irqsave(&rxq->lock, flags); | |
645 | ||
646 | if (list_empty(&rxq->rx_used)) { | |
647 | spin_unlock_irqrestore(&rxq->lock, flags); | |
648 | __free_pages(page, priv->hw_params.rx_page_order); | |
649 | return; | |
650 | } | |
651 | element = rxq->rx_used.next; | |
652 | rxb = list_entry(element, struct iwl_rx_mem_buffer, list); | |
653 | list_del(element); | |
654 | ||
655 | spin_unlock_irqrestore(&rxq->lock, flags); | |
656 | ||
6aac74b4 | 657 | BUG_ON(rxb->page); |
54b81550 WYG |
658 | rxb->page = page; |
659 | /* Get physical address of the RB */ | |
660 | rxb->page_dma = pci_map_page(priv->pci_dev, page, 0, | |
661 | PAGE_SIZE << priv->hw_params.rx_page_order, | |
662 | PCI_DMA_FROMDEVICE); | |
663 | /* dma address must be no more than 36 bits */ | |
664 | BUG_ON(rxb->page_dma & ~DMA_BIT_MASK(36)); | |
665 | /* and also 256 byte aligned! */ | |
666 | BUG_ON(rxb->page_dma & DMA_BIT_MASK(8)); | |
667 | ||
668 | spin_lock_irqsave(&rxq->lock, flags); | |
669 | ||
670 | list_add_tail(&rxb->list, &rxq->rx_free); | |
671 | rxq->free_count++; | |
672 | priv->alloc_rxb_page++; | |
673 | ||
674 | spin_unlock_irqrestore(&rxq->lock, flags); | |
675 | } | |
676 | } | |
677 | ||
678 | void iwlagn_rx_replenish(struct iwl_priv *priv) | |
679 | { | |
680 | unsigned long flags; | |
681 | ||
682 | iwlagn_rx_allocate(priv, GFP_KERNEL); | |
683 | ||
684 | spin_lock_irqsave(&priv->lock, flags); | |
685 | iwlagn_rx_queue_restock(priv); | |
686 | spin_unlock_irqrestore(&priv->lock, flags); | |
687 | } | |
688 | ||
689 | void iwlagn_rx_replenish_now(struct iwl_priv *priv) | |
690 | { | |
691 | iwlagn_rx_allocate(priv, GFP_ATOMIC); | |
692 | ||
693 | iwlagn_rx_queue_restock(priv); | |
694 | } | |
695 | ||
696 | /* Assumes that the skb field of the buffers in 'pool' is kept accurate. | |
697 | * If an SKB has been detached, the POOL needs to have its SKB set to NULL | |
698 | * This free routine walks the list of POOL entries and if SKB is set to | |
699 | * non NULL it is unmapped and freed | |
700 | */ | |
701 | void iwlagn_rx_queue_free(struct iwl_priv *priv, struct iwl_rx_queue *rxq) | |
702 | { | |
703 | int i; | |
704 | for (i = 0; i < RX_QUEUE_SIZE + RX_FREE_BUFFERS; i++) { | |
705 | if (rxq->pool[i].page != NULL) { | |
706 | pci_unmap_page(priv->pci_dev, rxq->pool[i].page_dma, | |
707 | PAGE_SIZE << priv->hw_params.rx_page_order, | |
708 | PCI_DMA_FROMDEVICE); | |
709 | __iwl_free_pages(priv, rxq->pool[i].page); | |
710 | rxq->pool[i].page = NULL; | |
711 | } | |
712 | } | |
713 | ||
714 | dma_free_coherent(&priv->pci_dev->dev, 4 * RX_QUEUE_SIZE, rxq->bd, | |
715 | rxq->dma_addr); | |
716 | dma_free_coherent(&priv->pci_dev->dev, sizeof(struct iwl_rb_status), | |
717 | rxq->rb_stts, rxq->rb_stts_dma); | |
718 | rxq->bd = NULL; | |
719 | rxq->rb_stts = NULL; | |
720 | } | |
721 | ||
722 | int iwlagn_rxq_stop(struct iwl_priv *priv) | |
723 | { | |
724 | ||
725 | /* stop Rx DMA */ | |
726 | iwl_write_direct32(priv, FH_MEM_RCSR_CHNL0_CONFIG_REG, 0); | |
727 | iwl_poll_direct_bit(priv, FH_MEM_RSSR_RX_STATUS_REG, | |
728 | FH_RSSR_CHNL0_RX_STATUS_CHNL_IDLE, 1000); | |
729 | ||
730 | return 0; | |
731 | } | |
8d801080 WYG |
732 | |
733 | int iwlagn_hwrate_to_mac80211_idx(u32 rate_n_flags, enum ieee80211_band band) | |
734 | { | |
735 | int idx = 0; | |
736 | int band_offset = 0; | |
737 | ||
738 | /* HT rate format: mac80211 wants an MCS number, which is just LSB */ | |
739 | if (rate_n_flags & RATE_MCS_HT_MSK) { | |
740 | idx = (rate_n_flags & 0xff); | |
741 | return idx; | |
742 | /* Legacy rate format, search for match in table */ | |
743 | } else { | |
744 | if (band == IEEE80211_BAND_5GHZ) | |
745 | band_offset = IWL_FIRST_OFDM_RATE; | |
746 | for (idx = band_offset; idx < IWL_RATE_COUNT_LEGACY; idx++) | |
747 | if (iwl_rates[idx].plcp == (rate_n_flags & 0xFF)) | |
748 | return idx - band_offset; | |
749 | } | |
750 | ||
751 | return -1; | |
752 | } | |
753 | ||
754 | /* Calc max signal level (dBm) among 3 possible receivers */ | |
755 | static inline int iwlagn_calc_rssi(struct iwl_priv *priv, | |
756 | struct iwl_rx_phy_res *rx_resp) | |
757 | { | |
758 | return priv->cfg->ops->utils->calc_rssi(priv, rx_resp); | |
759 | } | |
760 | ||
761 | #ifdef CONFIG_IWLWIFI_DEBUG | |
762 | /** | |
763 | * iwlagn_dbg_report_frame - dump frame to syslog during debug sessions | |
764 | * | |
765 | * You may hack this function to show different aspects of received frames, | |
766 | * including selective frame dumps. | |
767 | * group100 parameter selects whether to show 1 out of 100 good data frames. | |
768 | * All beacon and probe response frames are printed. | |
769 | */ | |
770 | static void iwlagn_dbg_report_frame(struct iwl_priv *priv, | |
771 | struct iwl_rx_phy_res *phy_res, u16 length, | |
772 | struct ieee80211_hdr *header, int group100) | |
773 | { | |
774 | u32 to_us; | |
775 | u32 print_summary = 0; | |
776 | u32 print_dump = 0; /* set to 1 to dump all frames' contents */ | |
777 | u32 hundred = 0; | |
778 | u32 dataframe = 0; | |
779 | __le16 fc; | |
780 | u16 seq_ctl; | |
781 | u16 channel; | |
782 | u16 phy_flags; | |
783 | u32 rate_n_flags; | |
784 | u32 tsf_low; | |
785 | int rssi; | |
786 | ||
787 | if (likely(!(iwl_get_debug_level(priv) & IWL_DL_RX))) | |
788 | return; | |
789 | ||
790 | /* MAC header */ | |
791 | fc = header->frame_control; | |
792 | seq_ctl = le16_to_cpu(header->seq_ctrl); | |
793 | ||
794 | /* metadata */ | |
795 | channel = le16_to_cpu(phy_res->channel); | |
796 | phy_flags = le16_to_cpu(phy_res->phy_flags); | |
797 | rate_n_flags = le32_to_cpu(phy_res->rate_n_flags); | |
798 | ||
799 | /* signal statistics */ | |
800 | rssi = iwlagn_calc_rssi(priv, phy_res); | |
801 | tsf_low = le64_to_cpu(phy_res->timestamp) & 0x0ffffffff; | |
802 | ||
803 | to_us = !compare_ether_addr(header->addr1, priv->mac_addr); | |
804 | ||
805 | /* if data frame is to us and all is good, | |
806 | * (optionally) print summary for only 1 out of every 100 */ | |
807 | if (to_us && (fc & ~cpu_to_le16(IEEE80211_FCTL_PROTECTED)) == | |
808 | cpu_to_le16(IEEE80211_FCTL_FROMDS | IEEE80211_FTYPE_DATA)) { | |
809 | dataframe = 1; | |
810 | if (!group100) | |
811 | print_summary = 1; /* print each frame */ | |
812 | else if (priv->framecnt_to_us < 100) { | |
813 | priv->framecnt_to_us++; | |
814 | print_summary = 0; | |
815 | } else { | |
816 | priv->framecnt_to_us = 0; | |
817 | print_summary = 1; | |
818 | hundred = 1; | |
819 | } | |
820 | } else { | |
821 | /* print summary for all other frames */ | |
822 | print_summary = 1; | |
823 | } | |
824 | ||
825 | if (print_summary) { | |
826 | char *title; | |
827 | int rate_idx; | |
828 | u32 bitrate; | |
829 | ||
830 | if (hundred) | |
831 | title = "100Frames"; | |
832 | else if (ieee80211_has_retry(fc)) | |
833 | title = "Retry"; | |
834 | else if (ieee80211_is_assoc_resp(fc)) | |
835 | title = "AscRsp"; | |
836 | else if (ieee80211_is_reassoc_resp(fc)) | |
837 | title = "RasRsp"; | |
838 | else if (ieee80211_is_probe_resp(fc)) { | |
839 | title = "PrbRsp"; | |
840 | print_dump = 1; /* dump frame contents */ | |
841 | } else if (ieee80211_is_beacon(fc)) { | |
842 | title = "Beacon"; | |
843 | print_dump = 1; /* dump frame contents */ | |
844 | } else if (ieee80211_is_atim(fc)) | |
845 | title = "ATIM"; | |
846 | else if (ieee80211_is_auth(fc)) | |
847 | title = "Auth"; | |
848 | else if (ieee80211_is_deauth(fc)) | |
849 | title = "DeAuth"; | |
850 | else if (ieee80211_is_disassoc(fc)) | |
851 | title = "DisAssoc"; | |
852 | else | |
853 | title = "Frame"; | |
854 | ||
855 | rate_idx = iwl_hwrate_to_plcp_idx(rate_n_flags); | |
856 | if (unlikely((rate_idx < 0) || (rate_idx >= IWL_RATE_COUNT))) { | |
857 | bitrate = 0; | |
858 | WARN_ON_ONCE(1); | |
859 | } else { | |
860 | bitrate = iwl_rates[rate_idx].ieee / 2; | |
861 | } | |
862 | ||
863 | /* print frame summary. | |
864 | * MAC addresses show just the last byte (for brevity), | |
865 | * but you can hack it to show more, if you'd like to. */ | |
866 | if (dataframe) | |
867 | IWL_DEBUG_RX(priv, "%s: mhd=0x%04x, dst=0x%02x, " | |
91dd6c27 | 868 | "len=%u, rssi=%d, chnl=%d, rate=%u,\n", |
8d801080 WYG |
869 | title, le16_to_cpu(fc), header->addr1[5], |
870 | length, rssi, channel, bitrate); | |
871 | else { | |
872 | /* src/dst addresses assume managed mode */ | |
873 | IWL_DEBUG_RX(priv, "%s: 0x%04x, dst=0x%02x, src=0x%02x, " | |
874 | "len=%u, rssi=%d, tim=%lu usec, " | |
875 | "phy=0x%02x, chnl=%d\n", | |
876 | title, le16_to_cpu(fc), header->addr1[5], | |
877 | header->addr3[5], length, rssi, | |
878 | tsf_low - priv->scan_start_tsf, | |
879 | phy_flags, channel); | |
880 | } | |
881 | } | |
882 | if (print_dump) | |
883 | iwl_print_hex_dump(priv, IWL_DL_RX, header, length); | |
884 | } | |
885 | #endif | |
886 | ||
887 | static u32 iwlagn_translate_rx_status(struct iwl_priv *priv, u32 decrypt_in) | |
888 | { | |
889 | u32 decrypt_out = 0; | |
890 | ||
891 | if ((decrypt_in & RX_RES_STATUS_STATION_FOUND) == | |
892 | RX_RES_STATUS_STATION_FOUND) | |
893 | decrypt_out |= (RX_RES_STATUS_STATION_FOUND | | |
894 | RX_RES_STATUS_NO_STATION_INFO_MISMATCH); | |
895 | ||
896 | decrypt_out |= (decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK); | |
897 | ||
898 | /* packet was not encrypted */ | |
899 | if ((decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) == | |
900 | RX_RES_STATUS_SEC_TYPE_NONE) | |
901 | return decrypt_out; | |
902 | ||
903 | /* packet was encrypted with unknown alg */ | |
904 | if ((decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) == | |
905 | RX_RES_STATUS_SEC_TYPE_ERR) | |
906 | return decrypt_out; | |
907 | ||
908 | /* decryption was not done in HW */ | |
909 | if ((decrypt_in & RX_MPDU_RES_STATUS_DEC_DONE_MSK) != | |
910 | RX_MPDU_RES_STATUS_DEC_DONE_MSK) | |
911 | return decrypt_out; | |
912 | ||
913 | switch (decrypt_in & RX_RES_STATUS_SEC_TYPE_MSK) { | |
914 | ||
915 | case RX_RES_STATUS_SEC_TYPE_CCMP: | |
916 | /* alg is CCM: check MIC only */ | |
917 | if (!(decrypt_in & RX_MPDU_RES_STATUS_MIC_OK)) | |
918 | /* Bad MIC */ | |
919 | decrypt_out |= RX_RES_STATUS_BAD_ICV_MIC; | |
920 | else | |
921 | decrypt_out |= RX_RES_STATUS_DECRYPT_OK; | |
922 | ||
923 | break; | |
924 | ||
925 | case RX_RES_STATUS_SEC_TYPE_TKIP: | |
926 | if (!(decrypt_in & RX_MPDU_RES_STATUS_TTAK_OK)) { | |
927 | /* Bad TTAK */ | |
928 | decrypt_out |= RX_RES_STATUS_BAD_KEY_TTAK; | |
929 | break; | |
930 | } | |
931 | /* fall through if TTAK OK */ | |
932 | default: | |
933 | if (!(decrypt_in & RX_MPDU_RES_STATUS_ICV_OK)) | |
934 | decrypt_out |= RX_RES_STATUS_BAD_ICV_MIC; | |
935 | else | |
936 | decrypt_out |= RX_RES_STATUS_DECRYPT_OK; | |
937 | break; | |
ee289b64 | 938 | } |
8d801080 WYG |
939 | |
940 | IWL_DEBUG_RX(priv, "decrypt_in:0x%x decrypt_out = 0x%x\n", | |
941 | decrypt_in, decrypt_out); | |
942 | ||
943 | return decrypt_out; | |
944 | } | |
945 | ||
946 | static void iwlagn_pass_packet_to_mac80211(struct iwl_priv *priv, | |
947 | struct ieee80211_hdr *hdr, | |
948 | u16 len, | |
949 | u32 ampdu_status, | |
950 | struct iwl_rx_mem_buffer *rxb, | |
951 | struct ieee80211_rx_status *stats) | |
952 | { | |
953 | struct sk_buff *skb; | |
8d801080 WYG |
954 | __le16 fc = hdr->frame_control; |
955 | ||
956 | /* We only process data packets if the interface is open */ | |
957 | if (unlikely(!priv->is_open)) { | |
958 | IWL_DEBUG_DROP_LIMIT(priv, | |
959 | "Dropping packet while interface is not open.\n"); | |
960 | return; | |
961 | } | |
962 | ||
963 | /* In case of HW accelerated crypto and bad decryption, drop */ | |
964 | if (!priv->cfg->mod_params->sw_crypto && | |
965 | iwl_set_decrypted_flag(priv, hdr, ampdu_status, stats)) | |
966 | return; | |
967 | ||
ecdf94b8 | 968 | skb = dev_alloc_skb(128); |
8d801080 | 969 | if (!skb) { |
ecdf94b8 | 970 | IWL_ERR(priv, "dev_alloc_skb failed\n"); |
8d801080 WYG |
971 | return; |
972 | } | |
973 | ||
8d801080 WYG |
974 | skb_add_rx_frag(skb, 0, rxb->page, (void *)hdr - rxb_addr(rxb), len); |
975 | ||
8d801080 WYG |
976 | iwl_update_stats(priv, false, fc, len); |
977 | memcpy(IEEE80211_SKB_RXCB(skb), stats, sizeof(*stats)); | |
978 | ||
979 | ieee80211_rx(priv->hw, skb); | |
8d801080 WYG |
980 | priv->alloc_rxb_page--; |
981 | rxb->page = NULL; | |
982 | } | |
983 | ||
984 | /* Called for REPLY_RX (legacy ABG frames), or | |
985 | * REPLY_RX_MPDU_CMD (HT high-throughput N frames). */ | |
986 | void iwlagn_rx_reply_rx(struct iwl_priv *priv, | |
987 | struct iwl_rx_mem_buffer *rxb) | |
988 | { | |
989 | struct ieee80211_hdr *header; | |
990 | struct ieee80211_rx_status rx_status; | |
991 | struct iwl_rx_packet *pkt = rxb_addr(rxb); | |
992 | struct iwl_rx_phy_res *phy_res; | |
993 | __le32 rx_pkt_status; | |
994 | struct iwl4965_rx_mpdu_res_start *amsdu; | |
995 | u32 len; | |
996 | u32 ampdu_status; | |
997 | u32 rate_n_flags; | |
998 | ||
999 | /** | |
1000 | * REPLY_RX and REPLY_RX_MPDU_CMD are handled differently. | |
1001 | * REPLY_RX: physical layer info is in this buffer | |
1002 | * REPLY_RX_MPDU_CMD: physical layer info was sent in separate | |
1003 | * command and cached in priv->last_phy_res | |
1004 | * | |
1005 | * Here we set up local variables depending on which command is | |
1006 | * received. | |
1007 | */ | |
1008 | if (pkt->hdr.cmd == REPLY_RX) { | |
1009 | phy_res = (struct iwl_rx_phy_res *)pkt->u.raw; | |
1010 | header = (struct ieee80211_hdr *)(pkt->u.raw + sizeof(*phy_res) | |
1011 | + phy_res->cfg_phy_cnt); | |
1012 | ||
1013 | len = le16_to_cpu(phy_res->byte_count); | |
1014 | rx_pkt_status = *(__le32 *)(pkt->u.raw + sizeof(*phy_res) + | |
1015 | phy_res->cfg_phy_cnt + len); | |
1016 | ampdu_status = le32_to_cpu(rx_pkt_status); | |
1017 | } else { | |
05d57520 | 1018 | if (!priv->_agn.last_phy_res_valid) { |
8d801080 WYG |
1019 | IWL_ERR(priv, "MPDU frame without cached PHY data\n"); |
1020 | return; | |
1021 | } | |
05d57520 | 1022 | phy_res = &priv->_agn.last_phy_res; |
8d801080 WYG |
1023 | amsdu = (struct iwl4965_rx_mpdu_res_start *)pkt->u.raw; |
1024 | header = (struct ieee80211_hdr *)(pkt->u.raw + sizeof(*amsdu)); | |
1025 | len = le16_to_cpu(amsdu->byte_count); | |
1026 | rx_pkt_status = *(__le32 *)(pkt->u.raw + sizeof(*amsdu) + len); | |
1027 | ampdu_status = iwlagn_translate_rx_status(priv, | |
1028 | le32_to_cpu(rx_pkt_status)); | |
1029 | } | |
1030 | ||
1031 | if ((unlikely(phy_res->cfg_phy_cnt > 20))) { | |
1032 | IWL_DEBUG_DROP(priv, "dsp size out of range [0,20]: %d/n", | |
1033 | phy_res->cfg_phy_cnt); | |
1034 | return; | |
1035 | } | |
1036 | ||
1037 | if (!(rx_pkt_status & RX_RES_STATUS_NO_CRC32_ERROR) || | |
1038 | !(rx_pkt_status & RX_RES_STATUS_NO_RXE_OVERFLOW)) { | |
1039 | IWL_DEBUG_RX(priv, "Bad CRC or FIFO: 0x%08X.\n", | |
1040 | le32_to_cpu(rx_pkt_status)); | |
1041 | return; | |
1042 | } | |
1043 | ||
1044 | /* This will be used in several places later */ | |
1045 | rate_n_flags = le32_to_cpu(phy_res->rate_n_flags); | |
1046 | ||
1047 | /* rx_status carries information about the packet to mac80211 */ | |
1048 | rx_status.mactime = le64_to_cpu(phy_res->timestamp); | |
1049 | rx_status.freq = | |
1050 | ieee80211_channel_to_frequency(le16_to_cpu(phy_res->channel)); | |
1051 | rx_status.band = (phy_res->phy_flags & RX_RES_PHY_FLAGS_BAND_24_MSK) ? | |
1052 | IEEE80211_BAND_2GHZ : IEEE80211_BAND_5GHZ; | |
1053 | rx_status.rate_idx = | |
1054 | iwlagn_hwrate_to_mac80211_idx(rate_n_flags, rx_status.band); | |
1055 | rx_status.flag = 0; | |
1056 | ||
1057 | /* TSF isn't reliable. In order to allow smooth user experience, | |
1058 | * this W/A doesn't propagate it to the mac80211 */ | |
1059 | /*rx_status.flag |= RX_FLAG_TSFT;*/ | |
1060 | ||
1061 | priv->ucode_beacon_time = le32_to_cpu(phy_res->beacon_time_stamp); | |
1062 | ||
1063 | /* Find max signal strength (dBm) among 3 antenna/receiver chains */ | |
1064 | rx_status.signal = iwlagn_calc_rssi(priv, phy_res); | |
1065 | ||
8d801080 WYG |
1066 | #ifdef CONFIG_IWLWIFI_DEBUG |
1067 | /* Set "1" to report good data frames in groups of 100 */ | |
1068 | if (unlikely(iwl_get_debug_level(priv) & IWL_DL_RX)) | |
1069 | iwlagn_dbg_report_frame(priv, phy_res, len, header, 1); | |
1070 | #endif | |
1071 | iwl_dbg_log_rx_data_frame(priv, len, header); | |
ed1b6e99 JB |
1072 | IWL_DEBUG_STATS_LIMIT(priv, "Rssi %d, TSF %llu\n", |
1073 | rx_status.signal, (unsigned long long)rx_status.mactime); | |
8d801080 WYG |
1074 | |
1075 | /* | |
1076 | * "antenna number" | |
1077 | * | |
1078 | * It seems that the antenna field in the phy flags value | |
1079 | * is actually a bit field. This is undefined by radiotap, | |
1080 | * it wants an actual antenna number but I always get "7" | |
1081 | * for most legacy frames I receive indicating that the | |
1082 | * same frame was received on all three RX chains. | |
1083 | * | |
1084 | * I think this field should be removed in favor of a | |
1085 | * new 802.11n radiotap field "RX chains" that is defined | |
1086 | * as a bitmask. | |
1087 | */ | |
1088 | rx_status.antenna = | |
1089 | (le16_to_cpu(phy_res->phy_flags) & RX_RES_PHY_FLAGS_ANTENNA_MSK) | |
1090 | >> RX_RES_PHY_FLAGS_ANTENNA_POS; | |
1091 | ||
1092 | /* set the preamble flag if appropriate */ | |
1093 | if (phy_res->phy_flags & RX_RES_PHY_FLAGS_SHORT_PREAMBLE_MSK) | |
1094 | rx_status.flag |= RX_FLAG_SHORTPRE; | |
1095 | ||
1096 | /* Set up the HT phy flags */ | |
1097 | if (rate_n_flags & RATE_MCS_HT_MSK) | |
1098 | rx_status.flag |= RX_FLAG_HT; | |
1099 | if (rate_n_flags & RATE_MCS_HT40_MSK) | |
1100 | rx_status.flag |= RX_FLAG_40MHZ; | |
1101 | if (rate_n_flags & RATE_MCS_SGI_MSK) | |
1102 | rx_status.flag |= RX_FLAG_SHORT_GI; | |
1103 | ||
1104 | iwlagn_pass_packet_to_mac80211(priv, header, len, ampdu_status, | |
1105 | rxb, &rx_status); | |
1106 | } | |
1107 | ||
1108 | /* Cache phy data (Rx signal strength, etc) for HT frame (REPLY_RX_PHY_CMD). | |
1109 | * This will be used later in iwl_rx_reply_rx() for REPLY_RX_MPDU_CMD. */ | |
1110 | void iwlagn_rx_reply_rx_phy(struct iwl_priv *priv, | |
05d57520 | 1111 | struct iwl_rx_mem_buffer *rxb) |
8d801080 WYG |
1112 | { |
1113 | struct iwl_rx_packet *pkt = rxb_addr(rxb); | |
05d57520 JB |
1114 | priv->_agn.last_phy_res_valid = true; |
1115 | memcpy(&priv->_agn.last_phy_res, pkt->u.raw, | |
8d801080 WYG |
1116 | sizeof(struct iwl_rx_phy_res)); |
1117 | } | |
b6e4c55a JB |
1118 | |
1119 | static int iwl_get_single_channel_for_scan(struct iwl_priv *priv, | |
1dda6d28 JB |
1120 | struct ieee80211_vif *vif, |
1121 | enum ieee80211_band band, | |
1122 | struct iwl_scan_channel *scan_ch) | |
b6e4c55a JB |
1123 | { |
1124 | const struct ieee80211_supported_band *sband; | |
1125 | const struct iwl_channel_info *ch_info; | |
1126 | u16 passive_dwell = 0; | |
1127 | u16 active_dwell = 0; | |
1128 | int i, added = 0; | |
1129 | u16 channel = 0; | |
1130 | ||
1131 | sband = iwl_get_hw_mode(priv, band); | |
1132 | if (!sband) { | |
1133 | IWL_ERR(priv, "invalid band\n"); | |
1134 | return added; | |
1135 | } | |
1136 | ||
1137 | active_dwell = iwl_get_active_dwell_time(priv, band, 0); | |
1dda6d28 | 1138 | passive_dwell = iwl_get_passive_dwell_time(priv, band, vif); |
b6e4c55a JB |
1139 | |
1140 | if (passive_dwell <= active_dwell) | |
1141 | passive_dwell = active_dwell + 1; | |
1142 | ||
1143 | /* only scan single channel, good enough to reset the RF */ | |
1144 | /* pick the first valid not in-use channel */ | |
1145 | if (band == IEEE80211_BAND_5GHZ) { | |
1146 | for (i = 14; i < priv->channel_count; i++) { | |
1147 | if (priv->channel_info[i].channel != | |
1148 | le16_to_cpu(priv->staging_rxon.channel)) { | |
1149 | channel = priv->channel_info[i].channel; | |
1150 | ch_info = iwl_get_channel_info(priv, | |
1151 | band, channel); | |
1152 | if (is_channel_valid(ch_info)) | |
1153 | break; | |
1154 | } | |
1155 | } | |
1156 | } else { | |
1157 | for (i = 0; i < 14; i++) { | |
1158 | if (priv->channel_info[i].channel != | |
1159 | le16_to_cpu(priv->staging_rxon.channel)) { | |
1160 | channel = | |
1161 | priv->channel_info[i].channel; | |
1162 | ch_info = iwl_get_channel_info(priv, | |
1163 | band, channel); | |
1164 | if (is_channel_valid(ch_info)) | |
1165 | break; | |
1166 | } | |
1167 | } | |
1168 | } | |
1169 | if (channel) { | |
1170 | scan_ch->channel = cpu_to_le16(channel); | |
1171 | scan_ch->type = SCAN_CHANNEL_TYPE_PASSIVE; | |
1172 | scan_ch->active_dwell = cpu_to_le16(active_dwell); | |
1173 | scan_ch->passive_dwell = cpu_to_le16(passive_dwell); | |
1174 | /* Set txpower levels to defaults */ | |
1175 | scan_ch->dsp_atten = 110; | |
1176 | if (band == IEEE80211_BAND_5GHZ) | |
1177 | scan_ch->tx_gain = ((1 << 5) | (3 << 3)) | 3; | |
1178 | else | |
1179 | scan_ch->tx_gain = ((1 << 5) | (5 << 3)); | |
1180 | added++; | |
1181 | } else | |
1182 | IWL_ERR(priv, "no valid channel found\n"); | |
1183 | return added; | |
1184 | } | |
1185 | ||
1186 | static int iwl_get_channels_for_scan(struct iwl_priv *priv, | |
1dda6d28 | 1187 | struct ieee80211_vif *vif, |
b6e4c55a JB |
1188 | enum ieee80211_band band, |
1189 | u8 is_active, u8 n_probes, | |
1190 | struct iwl_scan_channel *scan_ch) | |
1191 | { | |
1192 | struct ieee80211_channel *chan; | |
1193 | const struct ieee80211_supported_band *sband; | |
1194 | const struct iwl_channel_info *ch_info; | |
1195 | u16 passive_dwell = 0; | |
1196 | u16 active_dwell = 0; | |
1197 | int added, i; | |
1198 | u16 channel; | |
1199 | ||
1200 | sband = iwl_get_hw_mode(priv, band); | |
1201 | if (!sband) | |
1202 | return 0; | |
1203 | ||
1204 | active_dwell = iwl_get_active_dwell_time(priv, band, n_probes); | |
1dda6d28 | 1205 | passive_dwell = iwl_get_passive_dwell_time(priv, band, vif); |
b6e4c55a JB |
1206 | |
1207 | if (passive_dwell <= active_dwell) | |
1208 | passive_dwell = active_dwell + 1; | |
1209 | ||
1210 | for (i = 0, added = 0; i < priv->scan_request->n_channels; i++) { | |
1211 | chan = priv->scan_request->channels[i]; | |
1212 | ||
1213 | if (chan->band != band) | |
1214 | continue; | |
1215 | ||
1216 | channel = ieee80211_frequency_to_channel(chan->center_freq); | |
1217 | scan_ch->channel = cpu_to_le16(channel); | |
1218 | ||
1219 | ch_info = iwl_get_channel_info(priv, band, channel); | |
1220 | if (!is_channel_valid(ch_info)) { | |
1221 | IWL_DEBUG_SCAN(priv, "Channel %d is INVALID for this band.\n", | |
1222 | channel); | |
1223 | continue; | |
1224 | } | |
1225 | ||
1226 | if (!is_active || is_channel_passive(ch_info) || | |
1227 | (chan->flags & IEEE80211_CHAN_PASSIVE_SCAN)) | |
1228 | scan_ch->type = SCAN_CHANNEL_TYPE_PASSIVE; | |
1229 | else | |
1230 | scan_ch->type = SCAN_CHANNEL_TYPE_ACTIVE; | |
1231 | ||
1232 | if (n_probes) | |
1233 | scan_ch->type |= IWL_SCAN_PROBE_MASK(n_probes); | |
1234 | ||
1235 | scan_ch->active_dwell = cpu_to_le16(active_dwell); | |
1236 | scan_ch->passive_dwell = cpu_to_le16(passive_dwell); | |
1237 | ||
1238 | /* Set txpower levels to defaults */ | |
1239 | scan_ch->dsp_atten = 110; | |
1240 | ||
1241 | /* NOTE: if we were doing 6Mb OFDM for scans we'd use | |
1242 | * power level: | |
1243 | * scan_ch->tx_gain = ((1 << 5) | (2 << 3)) | 3; | |
1244 | */ | |
1245 | if (band == IEEE80211_BAND_5GHZ) | |
1246 | scan_ch->tx_gain = ((1 << 5) | (3 << 3)) | 3; | |
1247 | else | |
1248 | scan_ch->tx_gain = ((1 << 5) | (5 << 3)); | |
1249 | ||
1250 | IWL_DEBUG_SCAN(priv, "Scanning ch=%d prob=0x%X [%s %d]\n", | |
1251 | channel, le32_to_cpu(scan_ch->type), | |
1252 | (scan_ch->type & SCAN_CHANNEL_TYPE_ACTIVE) ? | |
1253 | "ACTIVE" : "PASSIVE", | |
1254 | (scan_ch->type & SCAN_CHANNEL_TYPE_ACTIVE) ? | |
1255 | active_dwell : passive_dwell); | |
1256 | ||
1257 | scan_ch++; | |
1258 | added++; | |
1259 | } | |
1260 | ||
1261 | IWL_DEBUG_SCAN(priv, "total channels to scan %d\n", added); | |
1262 | return added; | |
1263 | } | |
1264 | ||
1dda6d28 | 1265 | void iwlagn_request_scan(struct iwl_priv *priv, struct ieee80211_vif *vif) |
b6e4c55a JB |
1266 | { |
1267 | struct iwl_host_cmd cmd = { | |
1268 | .id = REPLY_SCAN_CMD, | |
1269 | .len = sizeof(struct iwl_scan_cmd), | |
1270 | .flags = CMD_SIZE_HUGE, | |
1271 | }; | |
1272 | struct iwl_scan_cmd *scan; | |
1273 | struct ieee80211_conf *conf = NULL; | |
1274 | u32 rate_flags = 0; | |
1275 | u16 cmd_len; | |
1276 | u16 rx_chain = 0; | |
1277 | enum ieee80211_band band; | |
1278 | u8 n_probes = 0; | |
1279 | u8 rx_ant = priv->hw_params.valid_rx_ant; | |
1280 | u8 rate; | |
1281 | bool is_active = false; | |
1282 | int chan_mod; | |
1283 | u8 active_chains; | |
1284 | ||
1285 | conf = ieee80211_get_hw_conf(priv->hw); | |
1286 | ||
1287 | cancel_delayed_work(&priv->scan_check); | |
1288 | ||
1289 | if (!iwl_is_ready(priv)) { | |
1290 | IWL_WARN(priv, "request scan called when driver not ready.\n"); | |
1291 | goto done; | |
1292 | } | |
1293 | ||
1294 | /* Make sure the scan wasn't canceled before this queued work | |
1295 | * was given the chance to run... */ | |
1296 | if (!test_bit(STATUS_SCANNING, &priv->status)) | |
1297 | goto done; | |
1298 | ||
1299 | /* This should never be called or scheduled if there is currently | |
1300 | * a scan active in the hardware. */ | |
1301 | if (test_bit(STATUS_SCAN_HW, &priv->status)) { | |
1302 | IWL_DEBUG_INFO(priv, "Multiple concurrent scan requests in parallel. " | |
1303 | "Ignoring second request.\n"); | |
1304 | goto done; | |
1305 | } | |
1306 | ||
1307 | if (test_bit(STATUS_EXIT_PENDING, &priv->status)) { | |
1308 | IWL_DEBUG_SCAN(priv, "Aborting scan due to device shutdown\n"); | |
1309 | goto done; | |
1310 | } | |
1311 | ||
1312 | if (test_bit(STATUS_SCAN_ABORTING, &priv->status)) { | |
1313 | IWL_DEBUG_HC(priv, "Scan request while abort pending. Queuing.\n"); | |
1314 | goto done; | |
1315 | } | |
1316 | ||
1317 | if (iwl_is_rfkill(priv)) { | |
1318 | IWL_DEBUG_HC(priv, "Aborting scan due to RF Kill activation\n"); | |
1319 | goto done; | |
1320 | } | |
1321 | ||
1322 | if (!test_bit(STATUS_READY, &priv->status)) { | |
1323 | IWL_DEBUG_HC(priv, "Scan request while uninitialized. Queuing.\n"); | |
1324 | goto done; | |
1325 | } | |
1326 | ||
1327 | if (!priv->scan_cmd) { | |
1328 | priv->scan_cmd = kmalloc(sizeof(struct iwl_scan_cmd) + | |
1329 | IWL_MAX_SCAN_SIZE, GFP_KERNEL); | |
1330 | if (!priv->scan_cmd) { | |
1331 | IWL_DEBUG_SCAN(priv, | |
1332 | "fail to allocate memory for scan\n"); | |
1333 | goto done; | |
1334 | } | |
1335 | } | |
1336 | scan = priv->scan_cmd; | |
1337 | memset(scan, 0, sizeof(struct iwl_scan_cmd) + IWL_MAX_SCAN_SIZE); | |
1338 | ||
1339 | scan->quiet_plcp_th = IWL_PLCP_QUIET_THRESH; | |
1340 | scan->quiet_time = IWL_ACTIVE_QUIET_TIME; | |
1341 | ||
1342 | if (iwl_is_associated(priv)) { | |
1343 | u16 interval = 0; | |
1344 | u32 extra; | |
1345 | u32 suspend_time = 100; | |
1346 | u32 scan_suspend_time = 100; | |
1347 | unsigned long flags; | |
1348 | ||
1349 | IWL_DEBUG_INFO(priv, "Scanning while associated...\n"); | |
1350 | spin_lock_irqsave(&priv->lock, flags); | |
1dda6d28 | 1351 | interval = vif ? vif->bss_conf.beacon_int : 0; |
b6e4c55a JB |
1352 | spin_unlock_irqrestore(&priv->lock, flags); |
1353 | ||
1354 | scan->suspend_time = 0; | |
1355 | scan->max_out_time = cpu_to_le32(200 * 1024); | |
1356 | if (!interval) | |
1357 | interval = suspend_time; | |
1358 | ||
1359 | extra = (suspend_time / interval) << 22; | |
1360 | scan_suspend_time = (extra | | |
1361 | ((suspend_time % interval) * 1024)); | |
1362 | scan->suspend_time = cpu_to_le32(scan_suspend_time); | |
1363 | IWL_DEBUG_SCAN(priv, "suspend_time 0x%X beacon interval %d\n", | |
1364 | scan_suspend_time, interval); | |
1365 | } | |
1366 | ||
1367 | if (priv->is_internal_short_scan) { | |
1368 | IWL_DEBUG_SCAN(priv, "Start internal passive scan.\n"); | |
1369 | } else if (priv->scan_request->n_ssids) { | |
1370 | int i, p = 0; | |
1371 | IWL_DEBUG_SCAN(priv, "Kicking off active scan\n"); | |
1372 | for (i = 0; i < priv->scan_request->n_ssids; i++) { | |
1373 | /* always does wildcard anyway */ | |
1374 | if (!priv->scan_request->ssids[i].ssid_len) | |
1375 | continue; | |
1376 | scan->direct_scan[p].id = WLAN_EID_SSID; | |
1377 | scan->direct_scan[p].len = | |
1378 | priv->scan_request->ssids[i].ssid_len; | |
1379 | memcpy(scan->direct_scan[p].ssid, | |
1380 | priv->scan_request->ssids[i].ssid, | |
1381 | priv->scan_request->ssids[i].ssid_len); | |
1382 | n_probes++; | |
1383 | p++; | |
1384 | } | |
1385 | is_active = true; | |
1386 | } else | |
1387 | IWL_DEBUG_SCAN(priv, "Start passive scan.\n"); | |
1388 | ||
1389 | scan->tx_cmd.tx_flags = TX_CMD_FLG_SEQ_CTL_MSK; | |
1390 | scan->tx_cmd.sta_id = priv->hw_params.bcast_sta_id; | |
1391 | scan->tx_cmd.stop_time.life_time = TX_CMD_LIFE_TIME_INFINITE; | |
1392 | ||
1393 | switch (priv->scan_band) { | |
1394 | case IEEE80211_BAND_2GHZ: | |
1395 | scan->flags = RXON_FLG_BAND_24G_MSK | RXON_FLG_AUTO_DETECT_MSK; | |
1396 | chan_mod = le32_to_cpu(priv->active_rxon.flags & RXON_FLG_CHANNEL_MODE_MSK) | |
1397 | >> RXON_FLG_CHANNEL_MODE_POS; | |
1398 | if (chan_mod == CHANNEL_MODE_PURE_40) { | |
1399 | rate = IWL_RATE_6M_PLCP; | |
1400 | } else { | |
1401 | rate = IWL_RATE_1M_PLCP; | |
1402 | rate_flags = RATE_MCS_CCK_MSK; | |
1403 | } | |
ad41ee3a | 1404 | scan->good_CRC_th = IWL_GOOD_CRC_TH_DISABLED; |
b6e4c55a JB |
1405 | break; |
1406 | case IEEE80211_BAND_5GHZ: | |
1407 | rate = IWL_RATE_6M_PLCP; | |
1408 | /* | |
ad41ee3a RC |
1409 | * If active scanning is requested but a certain channel is |
1410 | * marked passive, we can do active scanning if we detect | |
1411 | * transmissions. | |
1412 | * | |
1413 | * There is an issue with some firmware versions that triggers | |
1414 | * a sysassert on a "good CRC threshold" of zero (== disabled), | |
1415 | * on a radar channel even though this means that we should NOT | |
1416 | * send probes. | |
1417 | * | |
1418 | * The "good CRC threshold" is the number of frames that we | |
1419 | * need to receive during our dwell time on a channel before | |
1420 | * sending out probes -- setting this to a huge value will | |
1421 | * mean we never reach it, but at the same time work around | |
1422 | * the aforementioned issue. Thus use IWL_GOOD_CRC_TH_NEVER | |
1423 | * here instead of IWL_GOOD_CRC_TH_DISABLED. | |
b6e4c55a | 1424 | */ |
ad41ee3a RC |
1425 | scan->good_CRC_th = is_active ? IWL_GOOD_CRC_TH_DEFAULT : |
1426 | IWL_GOOD_CRC_TH_NEVER; | |
b6e4c55a JB |
1427 | break; |
1428 | default: | |
1429 | IWL_WARN(priv, "Invalid scan band count\n"); | |
1430 | goto done; | |
1431 | } | |
1432 | ||
1433 | band = priv->scan_band; | |
1434 | ||
e7cb4955 JB |
1435 | if (priv->cfg->scan_antennas[band]) |
1436 | rx_ant = priv->cfg->scan_antennas[band]; | |
1437 | ||
b6e4c55a JB |
1438 | priv->scan_tx_ant[band] = |
1439 | iwl_toggle_tx_ant(priv, priv->scan_tx_ant[band]); | |
1440 | rate_flags |= iwl_ant_idx_to_flags(priv->scan_tx_ant[band]); | |
1441 | scan->tx_cmd.rate_n_flags = iwl_hw_set_rate_n_flags(rate, rate_flags); | |
1442 | ||
1443 | /* In power save mode use one chain, otherwise use all chains */ | |
1444 | if (test_bit(STATUS_POWER_PMI, &priv->status)) { | |
1445 | /* rx_ant has been set to all valid chains previously */ | |
1446 | active_chains = rx_ant & | |
1447 | ((u8)(priv->chain_noise_data.active_chains)); | |
1448 | if (!active_chains) | |
1449 | active_chains = rx_ant; | |
1450 | ||
1451 | IWL_DEBUG_SCAN(priv, "chain_noise_data.active_chains: %u\n", | |
1452 | priv->chain_noise_data.active_chains); | |
1453 | ||
1454 | rx_ant = first_antenna(active_chains); | |
1455 | } | |
1456 | /* MIMO is not used here, but value is required */ | |
1457 | rx_chain |= priv->hw_params.valid_rx_ant << RXON_RX_CHAIN_VALID_POS; | |
1458 | rx_chain |= rx_ant << RXON_RX_CHAIN_FORCE_MIMO_SEL_POS; | |
1459 | rx_chain |= rx_ant << RXON_RX_CHAIN_FORCE_SEL_POS; | |
1460 | rx_chain |= 0x1 << RXON_RX_CHAIN_DRIVER_FORCE_POS; | |
1461 | scan->rx_chain = cpu_to_le16(rx_chain); | |
1462 | if (!priv->is_internal_short_scan) { | |
1463 | cmd_len = iwl_fill_probe_req(priv, | |
1464 | (struct ieee80211_mgmt *)scan->data, | |
1465 | priv->scan_request->ie, | |
1466 | priv->scan_request->ie_len, | |
1467 | IWL_MAX_SCAN_SIZE - sizeof(*scan)); | |
1468 | } else { | |
1469 | cmd_len = iwl_fill_probe_req(priv, | |
1470 | (struct ieee80211_mgmt *)scan->data, | |
1471 | NULL, 0, | |
1472 | IWL_MAX_SCAN_SIZE - sizeof(*scan)); | |
1473 | ||
1474 | } | |
1475 | scan->tx_cmd.len = cpu_to_le16(cmd_len); | |
b6e4c55a JB |
1476 | |
1477 | scan->filter_flags |= (RXON_FILTER_ACCEPT_GRP_MSK | | |
1478 | RXON_FILTER_BCON_AWARE_MSK); | |
1479 | ||
1480 | if (priv->is_internal_short_scan) { | |
1481 | scan->channel_count = | |
1dda6d28 | 1482 | iwl_get_single_channel_for_scan(priv, vif, band, |
b6e4c55a JB |
1483 | (void *)&scan->data[le16_to_cpu( |
1484 | scan->tx_cmd.len)]); | |
1485 | } else { | |
1486 | scan->channel_count = | |
1dda6d28 | 1487 | iwl_get_channels_for_scan(priv, vif, band, |
b6e4c55a JB |
1488 | is_active, n_probes, |
1489 | (void *)&scan->data[le16_to_cpu( | |
1490 | scan->tx_cmd.len)]); | |
1491 | } | |
1492 | if (scan->channel_count == 0) { | |
1493 | IWL_DEBUG_SCAN(priv, "channel count %d\n", scan->channel_count); | |
1494 | goto done; | |
1495 | } | |
1496 | ||
1497 | cmd.len += le16_to_cpu(scan->tx_cmd.len) + | |
1498 | scan->channel_count * sizeof(struct iwl_scan_channel); | |
1499 | cmd.data = scan; | |
1500 | scan->len = cpu_to_le16(cmd.len); | |
1501 | ||
1502 | set_bit(STATUS_SCAN_HW, &priv->status); | |
1503 | if (iwl_send_cmd_sync(priv, &cmd)) | |
1504 | goto done; | |
1505 | ||
1506 | queue_delayed_work(priv->workqueue, &priv->scan_check, | |
1507 | IWL_SCAN_CHECK_WATCHDOG); | |
1508 | ||
1509 | return; | |
1510 | ||
1511 | done: | |
1512 | /* Cannot perform scan. Make sure we clear scanning | |
1513 | * bits from status so next scan request can be performed. | |
1514 | * If we don't clear scanning status bit here all next scan | |
1515 | * will fail | |
1516 | */ | |
1517 | clear_bit(STATUS_SCAN_HW, &priv->status); | |
1518 | clear_bit(STATUS_SCANNING, &priv->status); | |
1519 | /* inform mac80211 scan aborted */ | |
1520 | queue_work(priv->workqueue, &priv->scan_completed); | |
1521 | } | |
1fa61b2e JB |
1522 | |
1523 | int iwlagn_manage_ibss_station(struct iwl_priv *priv, | |
1524 | struct ieee80211_vif *vif, bool add) | |
1525 | { | |
fd1af15d JB |
1526 | struct iwl_vif_priv *vif_priv = (void *)vif->drv_priv; |
1527 | ||
1fa61b2e | 1528 | if (add) |
57f8db89 | 1529 | return iwl_add_bssid_station(priv, vif->bss_conf.bssid, true, |
fd1af15d JB |
1530 | &vif_priv->ibss_bssid_sta_id); |
1531 | return iwl_remove_station(priv, vif_priv->ibss_bssid_sta_id, | |
1532 | vif->bss_conf.bssid); | |
1fa61b2e | 1533 | } |
1ff504e0 JB |
1534 | |
1535 | void iwl_free_tfds_in_queue(struct iwl_priv *priv, | |
1536 | int sta_id, int tid, int freed) | |
1537 | { | |
9c5ac091 RC |
1538 | WARN_ON(!spin_is_locked(&priv->sta_lock)); |
1539 | ||
1ff504e0 JB |
1540 | if (priv->stations[sta_id].tid[tid].tfds_in_queue >= freed) |
1541 | priv->stations[sta_id].tid[tid].tfds_in_queue -= freed; | |
1542 | else { | |
1543 | IWL_DEBUG_TX(priv, "free more than tfds_in_queue (%u:%d)\n", | |
1544 | priv->stations[sta_id].tid[tid].tfds_in_queue, | |
1545 | freed); | |
1546 | priv->stations[sta_id].tid[tid].tfds_in_queue = 0; | |
1547 | } | |
1548 | } |