]>
Commit | Line | Data |
---|---|---|
1 | /****************************************************************************** | |
2 | * | |
3 | * This file is provided under a dual BSD/GPLv2 license. When using or | |
4 | * redistributing this file, you may do so under either license. | |
5 | * | |
6 | * GPL LICENSE SUMMARY | |
7 | * | |
8 | * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved. | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or modify | |
11 | * it under the terms of version 2 of the GNU General Public License as | |
12 | * published by the Free Software Foundation. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, but | |
15 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
17 | * General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License | |
20 | * along with this program; if not, write to the Free Software | |
21 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110, | |
22 | * USA | |
23 | * | |
24 | * The full GNU General Public License is included in this distribution | |
25 | * in the file called COPYING. | |
26 | * | |
27 | * Contact Information: | |
28 | * Intel Linux Wireless <ilw@linux.intel.com> | |
29 | * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 | |
30 | * | |
31 | * BSD LICENSE | |
32 | * | |
33 | * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved. | |
34 | * All rights reserved. | |
35 | * | |
36 | * Redistribution and use in source and binary forms, with or without | |
37 | * modification, are permitted provided that the following conditions | |
38 | * are met: | |
39 | * | |
40 | * * Redistributions of source code must retain the above copyright | |
41 | * notice, this list of conditions and the following disclaimer. | |
42 | * * Redistributions in binary form must reproduce the above copyright | |
43 | * notice, this list of conditions and the following disclaimer in | |
44 | * the documentation and/or other materials provided with the | |
45 | * distribution. | |
46 | * * Neither the name Intel Corporation nor the names of its | |
47 | * contributors may be used to endorse or promote products derived | |
48 | * from this software without specific prior written permission. | |
49 | * | |
50 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
51 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
52 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | |
53 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
54 | * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
55 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | |
56 | * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
57 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
58 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
59 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
60 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
61 | * | |
62 | *****************************************************************************/ | |
63 | ||
64 | #include <linux/etherdevice.h> | |
65 | #include <net/mac80211.h> | |
66 | ||
67 | #include "mvm.h" | |
68 | #include "iwl-eeprom-parse.h" | |
69 | #include "fw-api-scan.h" | |
70 | ||
71 | #define IWL_PLCP_QUIET_THRESH 1 | |
72 | #define IWL_ACTIVE_QUIET_TIME 10 | |
73 | #define LONG_OUT_TIME_PERIOD 600 | |
74 | #define SHORT_OUT_TIME_PERIOD 200 | |
75 | #define SUSPEND_TIME_PERIOD 100 | |
76 | ||
77 | static inline __le16 iwl_mvm_scan_rx_chain(struct iwl_mvm *mvm) | |
78 | { | |
79 | u16 rx_chain; | |
80 | u8 rx_ant; | |
81 | ||
82 | if (mvm->scan_rx_ant != ANT_NONE) | |
83 | rx_ant = mvm->scan_rx_ant; | |
84 | else | |
85 | rx_ant = mvm->fw->valid_rx_ant; | |
86 | rx_chain = rx_ant << PHY_RX_CHAIN_VALID_POS; | |
87 | rx_chain |= rx_ant << PHY_RX_CHAIN_FORCE_MIMO_SEL_POS; | |
88 | rx_chain |= rx_ant << PHY_RX_CHAIN_FORCE_SEL_POS; | |
89 | rx_chain |= 0x1 << PHY_RX_CHAIN_DRIVER_FORCE_POS; | |
90 | return cpu_to_le16(rx_chain); | |
91 | } | |
92 | ||
93 | static inline __le32 iwl_mvm_scan_max_out_time(struct ieee80211_vif *vif, | |
94 | u32 flags, bool is_assoc) | |
95 | { | |
96 | if (!is_assoc) | |
97 | return 0; | |
98 | if (flags & NL80211_SCAN_FLAG_LOW_PRIORITY) | |
99 | return cpu_to_le32(ieee80211_tu_to_usec(SHORT_OUT_TIME_PERIOD)); | |
100 | return cpu_to_le32(ieee80211_tu_to_usec(LONG_OUT_TIME_PERIOD)); | |
101 | } | |
102 | ||
103 | static inline __le32 iwl_mvm_scan_suspend_time(struct ieee80211_vif *vif, | |
104 | bool is_assoc) | |
105 | { | |
106 | if (!is_assoc) | |
107 | return 0; | |
108 | return cpu_to_le32(ieee80211_tu_to_usec(SUSPEND_TIME_PERIOD)); | |
109 | } | |
110 | ||
111 | static inline __le32 | |
112 | iwl_mvm_scan_rxon_flags(struct cfg80211_scan_request *req) | |
113 | { | |
114 | if (req->channels[0]->band == IEEE80211_BAND_2GHZ) | |
115 | return cpu_to_le32(PHY_BAND_24); | |
116 | else | |
117 | return cpu_to_le32(PHY_BAND_5); | |
118 | } | |
119 | ||
120 | static inline __le32 | |
121 | iwl_mvm_scan_rate_n_flags(struct iwl_mvm *mvm, enum ieee80211_band band, | |
122 | bool no_cck) | |
123 | { | |
124 | u32 tx_ant; | |
125 | ||
126 | mvm->scan_last_antenna_idx = | |
127 | iwl_mvm_next_antenna(mvm, mvm->fw->valid_tx_ant, | |
128 | mvm->scan_last_antenna_idx); | |
129 | tx_ant = BIT(mvm->scan_last_antenna_idx) << RATE_MCS_ANT_POS; | |
130 | ||
131 | if (band == IEEE80211_BAND_2GHZ && !no_cck) | |
132 | return cpu_to_le32(IWL_RATE_1M_PLCP | RATE_MCS_CCK_MSK | | |
133 | tx_ant); | |
134 | else | |
135 | return cpu_to_le32(IWL_RATE_6M_PLCP | tx_ant); | |
136 | } | |
137 | ||
138 | /* | |
139 | * We insert the SSIDs in an inverted order, because the FW will | |
140 | * invert it back. The most prioritized SSID, which is first in the | |
141 | * request list, is not copied here, but inserted directly to the probe | |
142 | * request. | |
143 | */ | |
144 | static void iwl_mvm_scan_fill_ssids(struct iwl_scan_cmd *cmd, | |
145 | struct cfg80211_scan_request *req, | |
146 | int first) | |
147 | { | |
148 | int fw_idx, req_idx; | |
149 | ||
150 | for (req_idx = req->n_ssids - 1, fw_idx = 0; req_idx >= first; | |
151 | req_idx--, fw_idx++) { | |
152 | cmd->direct_scan[fw_idx].id = WLAN_EID_SSID; | |
153 | cmd->direct_scan[fw_idx].len = req->ssids[req_idx].ssid_len; | |
154 | memcpy(cmd->direct_scan[fw_idx].ssid, | |
155 | req->ssids[req_idx].ssid, | |
156 | req->ssids[req_idx].ssid_len); | |
157 | } | |
158 | } | |
159 | ||
160 | /* | |
161 | * If req->n_ssids > 0, it means we should do an active scan. | |
162 | * In case of active scan w/o directed scan, we receive a zero-length SSID | |
163 | * just to notify that this scan is active and not passive. | |
164 | * In order to notify the FW of the number of SSIDs we wish to scan (including | |
165 | * the zero-length one), we need to set the corresponding bits in chan->type, | |
166 | * one for each SSID, and set the active bit (first). If the first SSID is | |
167 | * already included in the probe template, so we need to set only | |
168 | * req->n_ssids - 1 bits in addition to the first bit. | |
169 | */ | |
170 | static u16 iwl_mvm_get_active_dwell(enum ieee80211_band band, int n_ssids) | |
171 | { | |
172 | if (band == IEEE80211_BAND_2GHZ) | |
173 | return 30 + 3 * (n_ssids + 1); | |
174 | return 20 + 2 * (n_ssids + 1); | |
175 | } | |
176 | ||
177 | static u16 iwl_mvm_get_passive_dwell(enum ieee80211_band band) | |
178 | { | |
179 | return band == IEEE80211_BAND_2GHZ ? 100 + 20 : 100 + 10; | |
180 | } | |
181 | ||
182 | static void iwl_mvm_scan_fill_channels(struct iwl_scan_cmd *cmd, | |
183 | struct cfg80211_scan_request *req, | |
184 | bool basic_ssid) | |
185 | { | |
186 | u16 passive_dwell = iwl_mvm_get_passive_dwell(req->channels[0]->band); | |
187 | u16 active_dwell = iwl_mvm_get_active_dwell(req->channels[0]->band, | |
188 | req->n_ssids); | |
189 | struct iwl_scan_channel *chan = (struct iwl_scan_channel *) | |
190 | (cmd->data + le16_to_cpu(cmd->tx_cmd.len)); | |
191 | int i; | |
192 | int type = BIT(req->n_ssids) - 1; | |
193 | ||
194 | if (!basic_ssid) | |
195 | type |= BIT(req->n_ssids); | |
196 | ||
197 | for (i = 0; i < cmd->channel_count; i++) { | |
198 | chan->channel = cpu_to_le16(req->channels[i]->hw_value); | |
199 | chan->type = cpu_to_le32(type); | |
200 | if (req->channels[i]->flags & IEEE80211_CHAN_NO_IR) | |
201 | chan->type &= cpu_to_le32(~SCAN_CHANNEL_TYPE_ACTIVE); | |
202 | chan->active_dwell = cpu_to_le16(active_dwell); | |
203 | chan->passive_dwell = cpu_to_le16(passive_dwell); | |
204 | chan->iteration_count = cpu_to_le16(1); | |
205 | chan++; | |
206 | } | |
207 | } | |
208 | ||
209 | /* | |
210 | * Fill in probe request with the following parameters: | |
211 | * TA is our vif HW address, which mac80211 ensures we have. | |
212 | * Packet is broadcasted, so this is both SA and DA. | |
213 | * The probe request IE is made out of two: first comes the most prioritized | |
214 | * SSID if a directed scan is requested. Second comes whatever extra | |
215 | * information was given to us as the scan request IE. | |
216 | */ | |
217 | static u16 iwl_mvm_fill_probe_req(struct ieee80211_mgmt *frame, const u8 *ta, | |
218 | int n_ssids, const u8 *ssid, int ssid_len, | |
219 | const u8 *ie, int ie_len, | |
220 | int left) | |
221 | { | |
222 | int len = 0; | |
223 | u8 *pos = NULL; | |
224 | ||
225 | /* Make sure there is enough space for the probe request, | |
226 | * two mandatory IEs and the data */ | |
227 | left -= 24; | |
228 | if (left < 0) | |
229 | return 0; | |
230 | ||
231 | frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ); | |
232 | eth_broadcast_addr(frame->da); | |
233 | memcpy(frame->sa, ta, ETH_ALEN); | |
234 | eth_broadcast_addr(frame->bssid); | |
235 | frame->seq_ctrl = 0; | |
236 | ||
237 | len += 24; | |
238 | ||
239 | /* for passive scans, no need to fill anything */ | |
240 | if (n_ssids == 0) | |
241 | return (u16)len; | |
242 | ||
243 | /* points to the payload of the request */ | |
244 | pos = &frame->u.probe_req.variable[0]; | |
245 | ||
246 | /* fill in our SSID IE */ | |
247 | left -= ssid_len + 2; | |
248 | if (left < 0) | |
249 | return 0; | |
250 | *pos++ = WLAN_EID_SSID; | |
251 | *pos++ = ssid_len; | |
252 | if (ssid && ssid_len) { /* ssid_len may be == 0 even if ssid is valid */ | |
253 | memcpy(pos, ssid, ssid_len); | |
254 | pos += ssid_len; | |
255 | } | |
256 | ||
257 | len += ssid_len + 2; | |
258 | ||
259 | if (WARN_ON(left < ie_len)) | |
260 | return len; | |
261 | ||
262 | if (ie && ie_len) { | |
263 | memcpy(pos, ie, ie_len); | |
264 | len += ie_len; | |
265 | } | |
266 | ||
267 | return (u16)len; | |
268 | } | |
269 | ||
270 | static void iwl_mvm_vif_assoc_iterator(void *data, u8 *mac, | |
271 | struct ieee80211_vif *vif) | |
272 | { | |
273 | bool *is_assoc = data; | |
274 | ||
275 | if (vif->bss_conf.assoc) | |
276 | *is_assoc = true; | |
277 | } | |
278 | ||
279 | int iwl_mvm_scan_request(struct iwl_mvm *mvm, | |
280 | struct ieee80211_vif *vif, | |
281 | struct cfg80211_scan_request *req) | |
282 | { | |
283 | struct iwl_host_cmd hcmd = { | |
284 | .id = SCAN_REQUEST_CMD, | |
285 | .len = { 0, }, | |
286 | .data = { mvm->scan_cmd, }, | |
287 | .flags = CMD_SYNC, | |
288 | .dataflags = { IWL_HCMD_DFL_NOCOPY, }, | |
289 | }; | |
290 | struct iwl_scan_cmd *cmd = mvm->scan_cmd; | |
291 | bool is_assoc = false; | |
292 | int ret; | |
293 | u32 status; | |
294 | int ssid_len = 0; | |
295 | u8 *ssid = NULL; | |
296 | bool basic_ssid = !(mvm->fw->ucode_capa.flags & | |
297 | IWL_UCODE_TLV_FLAGS_NO_BASIC_SSID); | |
298 | ||
299 | lockdep_assert_held(&mvm->mutex); | |
300 | BUG_ON(mvm->scan_cmd == NULL); | |
301 | ||
302 | IWL_DEBUG_SCAN(mvm, "Handling mac80211 scan request\n"); | |
303 | mvm->scan_status = IWL_MVM_SCAN_OS; | |
304 | memset(cmd, 0, sizeof(struct iwl_scan_cmd) + | |
305 | mvm->fw->ucode_capa.max_probe_length + | |
306 | (MAX_NUM_SCAN_CHANNELS * sizeof(struct iwl_scan_channel))); | |
307 | ieee80211_iterate_active_interfaces_atomic(mvm->hw, | |
308 | IEEE80211_IFACE_ITER_NORMAL, | |
309 | iwl_mvm_vif_assoc_iterator, | |
310 | &is_assoc); | |
311 | cmd->channel_count = (u8)req->n_channels; | |
312 | cmd->quiet_time = cpu_to_le16(IWL_ACTIVE_QUIET_TIME); | |
313 | cmd->quiet_plcp_th = cpu_to_le16(IWL_PLCP_QUIET_THRESH); | |
314 | cmd->rxchain_sel_flags = iwl_mvm_scan_rx_chain(mvm); | |
315 | cmd->max_out_time = iwl_mvm_scan_max_out_time(vif, req->flags, | |
316 | is_assoc); | |
317 | cmd->suspend_time = iwl_mvm_scan_suspend_time(vif, is_assoc); | |
318 | cmd->rxon_flags = iwl_mvm_scan_rxon_flags(req); | |
319 | cmd->filter_flags = cpu_to_le32(MAC_FILTER_ACCEPT_GRP | | |
320 | MAC_FILTER_IN_BEACON); | |
321 | ||
322 | if (vif->type == NL80211_IFTYPE_P2P_DEVICE) | |
323 | cmd->type = cpu_to_le32(SCAN_TYPE_DISCOVERY_FORCED); | |
324 | else | |
325 | cmd->type = cpu_to_le32(SCAN_TYPE_FORCED); | |
326 | ||
327 | cmd->repeats = cpu_to_le32(1); | |
328 | ||
329 | /* | |
330 | * If the user asked for passive scan, don't change to active scan if | |
331 | * you see any activity on the channel - remain passive. | |
332 | */ | |
333 | if (req->n_ssids > 0) { | |
334 | cmd->passive2active = cpu_to_le16(1); | |
335 | cmd->scan_flags |= SCAN_FLAGS_PASSIVE2ACTIVE; | |
336 | if (basic_ssid) { | |
337 | ssid = req->ssids[0].ssid; | |
338 | ssid_len = req->ssids[0].ssid_len; | |
339 | } | |
340 | } else { | |
341 | cmd->passive2active = 0; | |
342 | cmd->scan_flags &= ~SCAN_FLAGS_PASSIVE2ACTIVE; | |
343 | } | |
344 | ||
345 | iwl_mvm_scan_fill_ssids(cmd, req, basic_ssid ? 1 : 0); | |
346 | ||
347 | cmd->tx_cmd.tx_flags = cpu_to_le32(TX_CMD_FLG_SEQ_CTL | | |
348 | TX_CMD_FLG_BT_DIS); | |
349 | cmd->tx_cmd.sta_id = mvm->aux_sta.sta_id; | |
350 | cmd->tx_cmd.life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE); | |
351 | cmd->tx_cmd.rate_n_flags = | |
352 | iwl_mvm_scan_rate_n_flags(mvm, req->channels[0]->band, | |
353 | req->no_cck); | |
354 | ||
355 | cmd->tx_cmd.len = | |
356 | cpu_to_le16(iwl_mvm_fill_probe_req( | |
357 | (struct ieee80211_mgmt *)cmd->data, | |
358 | vif->addr, | |
359 | req->n_ssids, ssid, ssid_len, | |
360 | req->ie, req->ie_len, | |
361 | mvm->fw->ucode_capa.max_probe_length)); | |
362 | ||
363 | iwl_mvm_scan_fill_channels(cmd, req, basic_ssid); | |
364 | ||
365 | cmd->len = cpu_to_le16(sizeof(struct iwl_scan_cmd) + | |
366 | le16_to_cpu(cmd->tx_cmd.len) + | |
367 | (cmd->channel_count * sizeof(struct iwl_scan_channel))); | |
368 | hcmd.len[0] = le16_to_cpu(cmd->len); | |
369 | ||
370 | status = SCAN_RESPONSE_OK; | |
371 | ret = iwl_mvm_send_cmd_status(mvm, &hcmd, &status); | |
372 | if (!ret && status == SCAN_RESPONSE_OK) { | |
373 | IWL_DEBUG_SCAN(mvm, "Scan request was sent successfully\n"); | |
374 | } else { | |
375 | /* | |
376 | * If the scan failed, it usually means that the FW was unable | |
377 | * to allocate the time events. Warn on it, but maybe we | |
378 | * should try to send the command again with different params. | |
379 | */ | |
380 | IWL_ERR(mvm, "Scan failed! status 0x%x ret %d\n", | |
381 | status, ret); | |
382 | mvm->scan_status = IWL_MVM_SCAN_NONE; | |
383 | ret = -EIO; | |
384 | } | |
385 | return ret; | |
386 | } | |
387 | ||
388 | int iwl_mvm_rx_scan_response(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb, | |
389 | struct iwl_device_cmd *cmd) | |
390 | { | |
391 | struct iwl_rx_packet *pkt = rxb_addr(rxb); | |
392 | struct iwl_cmd_response *resp = (void *)pkt->data; | |
393 | ||
394 | IWL_DEBUG_SCAN(mvm, "Scan response received. status 0x%x\n", | |
395 | le32_to_cpu(resp->status)); | |
396 | return 0; | |
397 | } | |
398 | ||
399 | int iwl_mvm_rx_scan_complete(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb, | |
400 | struct iwl_device_cmd *cmd) | |
401 | { | |
402 | struct iwl_rx_packet *pkt = rxb_addr(rxb); | |
403 | struct iwl_scan_complete_notif *notif = (void *)pkt->data; | |
404 | ||
405 | IWL_DEBUG_SCAN(mvm, "Scan complete: status=0x%x scanned channels=%d\n", | |
406 | notif->status, notif->scanned_channels); | |
407 | ||
408 | mvm->scan_status = IWL_MVM_SCAN_NONE; | |
409 | ieee80211_scan_completed(mvm->hw, notif->status != SCAN_COMP_STATUS_OK); | |
410 | ||
411 | iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN); | |
412 | ||
413 | return 0; | |
414 | } | |
415 | ||
416 | int iwl_mvm_rx_sched_scan_results(struct iwl_mvm *mvm, | |
417 | struct iwl_rx_cmd_buffer *rxb, | |
418 | struct iwl_device_cmd *cmd) | |
419 | { | |
420 | struct iwl_rx_packet *pkt = rxb_addr(rxb); | |
421 | struct iwl_sched_scan_results *notif = (void *)pkt->data; | |
422 | ||
423 | if (notif->client_bitmap & SCAN_CLIENT_SCHED_SCAN) { | |
424 | IWL_DEBUG_SCAN(mvm, "Scheduled scan results\n"); | |
425 | ieee80211_sched_scan_results(mvm->hw); | |
426 | } | |
427 | ||
428 | return 0; | |
429 | } | |
430 | ||
431 | static bool iwl_mvm_scan_abort_notif(struct iwl_notif_wait_data *notif_wait, | |
432 | struct iwl_rx_packet *pkt, void *data) | |
433 | { | |
434 | struct iwl_mvm *mvm = | |
435 | container_of(notif_wait, struct iwl_mvm, notif_wait); | |
436 | struct iwl_scan_complete_notif *notif; | |
437 | u32 *resp; | |
438 | ||
439 | switch (pkt->hdr.cmd) { | |
440 | case SCAN_ABORT_CMD: | |
441 | resp = (void *)pkt->data; | |
442 | if (*resp == CAN_ABORT_STATUS) { | |
443 | IWL_DEBUG_SCAN(mvm, | |
444 | "Scan can be aborted, wait until completion\n"); | |
445 | return false; | |
446 | } | |
447 | ||
448 | /* | |
449 | * If scan cannot be aborted, it means that we had a | |
450 | * SCAN_COMPLETE_NOTIFICATION in the pipe and it called | |
451 | * ieee80211_scan_completed already. | |
452 | */ | |
453 | IWL_DEBUG_SCAN(mvm, "Scan cannot be aborted, exit now: %d\n", | |
454 | *resp); | |
455 | return true; | |
456 | ||
457 | case SCAN_COMPLETE_NOTIFICATION: | |
458 | notif = (void *)pkt->data; | |
459 | IWL_DEBUG_SCAN(mvm, "Scan aborted: status 0x%x\n", | |
460 | notif->status); | |
461 | return true; | |
462 | ||
463 | default: | |
464 | WARN_ON(1); | |
465 | return false; | |
466 | }; | |
467 | } | |
468 | ||
469 | void iwl_mvm_cancel_scan(struct iwl_mvm *mvm) | |
470 | { | |
471 | struct iwl_notification_wait wait_scan_abort; | |
472 | static const u8 scan_abort_notif[] = { SCAN_ABORT_CMD, | |
473 | SCAN_COMPLETE_NOTIFICATION }; | |
474 | int ret; | |
475 | ||
476 | if (mvm->scan_status == IWL_MVM_SCAN_NONE) | |
477 | return; | |
478 | ||
479 | if (iwl_mvm_is_radio_killed(mvm)) { | |
480 | ieee80211_scan_completed(mvm->hw, true); | |
481 | iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN); | |
482 | mvm->scan_status = IWL_MVM_SCAN_NONE; | |
483 | return; | |
484 | } | |
485 | ||
486 | iwl_init_notification_wait(&mvm->notif_wait, &wait_scan_abort, | |
487 | scan_abort_notif, | |
488 | ARRAY_SIZE(scan_abort_notif), | |
489 | iwl_mvm_scan_abort_notif, NULL); | |
490 | ||
491 | ret = iwl_mvm_send_cmd_pdu(mvm, SCAN_ABORT_CMD, CMD_SYNC, 0, NULL); | |
492 | if (ret) { | |
493 | IWL_ERR(mvm, "Couldn't send SCAN_ABORT_CMD: %d\n", ret); | |
494 | /* mac80211's state will be cleaned in the nic_restart flow */ | |
495 | goto out_remove_notif; | |
496 | } | |
497 | ||
498 | ret = iwl_wait_notification(&mvm->notif_wait, &wait_scan_abort, 1 * HZ); | |
499 | if (ret) | |
500 | IWL_ERR(mvm, "%s - failed on timeout\n", __func__); | |
501 | ||
502 | return; | |
503 | ||
504 | out_remove_notif: | |
505 | iwl_remove_notification(&mvm->notif_wait, &wait_scan_abort); | |
506 | } | |
507 | ||
508 | int iwl_mvm_rx_scan_offload_complete_notif(struct iwl_mvm *mvm, | |
509 | struct iwl_rx_cmd_buffer *rxb, | |
510 | struct iwl_device_cmd *cmd) | |
511 | { | |
512 | struct iwl_rx_packet *pkt = rxb_addr(rxb); | |
513 | struct iwl_scan_offload_complete *scan_notif = (void *)pkt->data; | |
514 | ||
515 | /* scan status must be locked for proper checking */ | |
516 | lockdep_assert_held(&mvm->mutex); | |
517 | ||
518 | IWL_DEBUG_SCAN(mvm, "Scheduled scan completed, status %s\n", | |
519 | scan_notif->status == IWL_SCAN_OFFLOAD_COMPLETED ? | |
520 | "completed" : "aborted"); | |
521 | ||
522 | /* might already be something else again, don't reset if so */ | |
523 | if (mvm->scan_status == IWL_MVM_SCAN_SCHED) | |
524 | mvm->scan_status = IWL_MVM_SCAN_NONE; | |
525 | ieee80211_sched_scan_stopped(mvm->hw); | |
526 | ||
527 | return 0; | |
528 | } | |
529 | ||
530 | static void iwl_scan_offload_build_tx_cmd(struct iwl_mvm *mvm, | |
531 | struct ieee80211_vif *vif, | |
532 | struct ieee80211_sched_scan_ies *ies, | |
533 | enum ieee80211_band band, | |
534 | struct iwl_tx_cmd *cmd, | |
535 | u8 *data) | |
536 | { | |
537 | u16 cmd_len; | |
538 | ||
539 | cmd->tx_flags = cpu_to_le32(TX_CMD_FLG_SEQ_CTL); | |
540 | cmd->life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE); | |
541 | cmd->sta_id = mvm->aux_sta.sta_id; | |
542 | ||
543 | cmd->rate_n_flags = iwl_mvm_scan_rate_n_flags(mvm, band, false); | |
544 | ||
545 | cmd_len = iwl_mvm_fill_probe_req((struct ieee80211_mgmt *)data, | |
546 | vif->addr, | |
547 | 1, NULL, 0, | |
548 | ies->ie[band], ies->len[band], | |
549 | SCAN_OFFLOAD_PROBE_REQ_SIZE); | |
550 | cmd->len = cpu_to_le16(cmd_len); | |
551 | } | |
552 | ||
553 | static void iwl_build_scan_cmd(struct iwl_mvm *mvm, | |
554 | struct ieee80211_vif *vif, | |
555 | struct cfg80211_sched_scan_request *req, | |
556 | struct iwl_scan_offload_cmd *scan) | |
557 | { | |
558 | bool is_assoc = false; | |
559 | ||
560 | ieee80211_iterate_active_interfaces_atomic(mvm->hw, | |
561 | IEEE80211_IFACE_ITER_NORMAL, | |
562 | iwl_mvm_vif_assoc_iterator, | |
563 | &is_assoc); | |
564 | scan->channel_count = | |
565 | mvm->nvm_data->bands[IEEE80211_BAND_2GHZ].n_channels + | |
566 | mvm->nvm_data->bands[IEEE80211_BAND_5GHZ].n_channels; | |
567 | scan->quiet_time = cpu_to_le16(IWL_ACTIVE_QUIET_TIME); | |
568 | scan->quiet_plcp_th = cpu_to_le16(IWL_PLCP_QUIET_THRESH); | |
569 | scan->good_CRC_th = IWL_GOOD_CRC_TH_DEFAULT; | |
570 | scan->rx_chain = iwl_mvm_scan_rx_chain(mvm); | |
571 | scan->max_out_time = iwl_mvm_scan_max_out_time(vif, req->flags, | |
572 | is_assoc); | |
573 | scan->suspend_time = iwl_mvm_scan_suspend_time(vif, is_assoc); | |
574 | scan->filter_flags |= cpu_to_le32(MAC_FILTER_ACCEPT_GRP | | |
575 | MAC_FILTER_IN_BEACON); | |
576 | scan->scan_type = cpu_to_le32(SCAN_TYPE_BACKGROUND); | |
577 | scan->rep_count = cpu_to_le32(1); | |
578 | } | |
579 | ||
580 | static int iwl_ssid_exist(u8 *ssid, u8 ssid_len, struct iwl_ssid_ie *ssid_list) | |
581 | { | |
582 | int i; | |
583 | ||
584 | for (i = 0; i < PROBE_OPTION_MAX; i++) { | |
585 | if (!ssid_list[i].len) | |
586 | break; | |
587 | if (ssid_list[i].len == ssid_len && | |
588 | !memcmp(ssid_list->ssid, ssid, ssid_len)) | |
589 | return i; | |
590 | } | |
591 | return -1; | |
592 | } | |
593 | ||
594 | static void iwl_scan_offload_build_ssid(struct cfg80211_sched_scan_request *req, | |
595 | struct iwl_scan_offload_cmd *scan, | |
596 | u32 *ssid_bitmap) | |
597 | { | |
598 | int i, j; | |
599 | int index; | |
600 | ||
601 | /* | |
602 | * copy SSIDs from match list. | |
603 | * iwl_config_sched_scan_profiles() uses the order of these ssids to | |
604 | * config match list. | |
605 | */ | |
606 | for (i = 0; i < req->n_match_sets && i < PROBE_OPTION_MAX; i++) { | |
607 | /* skip empty SSID matchsets */ | |
608 | if (!req->match_sets[i].ssid.ssid_len) | |
609 | continue; | |
610 | scan->direct_scan[i].id = WLAN_EID_SSID; | |
611 | scan->direct_scan[i].len = req->match_sets[i].ssid.ssid_len; | |
612 | memcpy(scan->direct_scan[i].ssid, req->match_sets[i].ssid.ssid, | |
613 | scan->direct_scan[i].len); | |
614 | } | |
615 | ||
616 | /* add SSIDs from scan SSID list */ | |
617 | *ssid_bitmap = 0; | |
618 | for (j = 0; j < req->n_ssids && i < PROBE_OPTION_MAX; j++) { | |
619 | index = iwl_ssid_exist(req->ssids[j].ssid, | |
620 | req->ssids[j].ssid_len, | |
621 | scan->direct_scan); | |
622 | if (index < 0) { | |
623 | if (!req->ssids[j].ssid_len) | |
624 | continue; | |
625 | scan->direct_scan[i].id = WLAN_EID_SSID; | |
626 | scan->direct_scan[i].len = req->ssids[j].ssid_len; | |
627 | memcpy(scan->direct_scan[i].ssid, req->ssids[j].ssid, | |
628 | scan->direct_scan[i].len); | |
629 | *ssid_bitmap |= BIT(i + 1); | |
630 | i++; | |
631 | } else { | |
632 | *ssid_bitmap |= BIT(index + 1); | |
633 | } | |
634 | } | |
635 | } | |
636 | ||
637 | static void iwl_build_channel_cfg(struct iwl_mvm *mvm, | |
638 | struct cfg80211_sched_scan_request *req, | |
639 | struct iwl_scan_channel_cfg *channels, | |
640 | enum ieee80211_band band, | |
641 | int *head, int *tail, | |
642 | u32 ssid_bitmap) | |
643 | { | |
644 | struct ieee80211_supported_band *s_band; | |
645 | int n_probes = req->n_ssids; | |
646 | int n_channels = req->n_channels; | |
647 | u8 active_dwell, passive_dwell; | |
648 | int i, j, index = 0; | |
649 | bool partial; | |
650 | ||
651 | /* | |
652 | * We have to configure all supported channels, even if we don't want to | |
653 | * scan on them, but we have to send channels in the order that we want | |
654 | * to scan. So add requested channels to head of the list and others to | |
655 | * the end. | |
656 | */ | |
657 | active_dwell = iwl_mvm_get_active_dwell(band, n_probes); | |
658 | passive_dwell = iwl_mvm_get_passive_dwell(band); | |
659 | s_band = &mvm->nvm_data->bands[band]; | |
660 | ||
661 | for (i = 0; i < s_band->n_channels && *head <= *tail; i++) { | |
662 | partial = false; | |
663 | for (j = 0; j < n_channels; j++) | |
664 | if (s_band->channels[i].center_freq == | |
665 | req->channels[j]->center_freq) { | |
666 | index = *head; | |
667 | (*head)++; | |
668 | /* | |
669 | * Channels that came with the request will be | |
670 | * in partial scan . | |
671 | */ | |
672 | partial = true; | |
673 | break; | |
674 | } | |
675 | if (!partial) { | |
676 | index = *tail; | |
677 | (*tail)--; | |
678 | } | |
679 | channels->channel_number[index] = | |
680 | cpu_to_le16(ieee80211_frequency_to_channel( | |
681 | s_band->channels[i].center_freq)); | |
682 | channels->dwell_time[index][0] = active_dwell; | |
683 | channels->dwell_time[index][1] = passive_dwell; | |
684 | ||
685 | channels->iter_count[index] = cpu_to_le16(1); | |
686 | channels->iter_interval[index] = 0; | |
687 | ||
688 | if (!(s_band->channels[i].flags & IEEE80211_CHAN_NO_IR)) | |
689 | channels->type[index] |= | |
690 | cpu_to_le32(IWL_SCAN_OFFLOAD_CHANNEL_ACTIVE); | |
691 | ||
692 | channels->type[index] |= | |
693 | cpu_to_le32(IWL_SCAN_OFFLOAD_CHANNEL_FULL); | |
694 | if (partial) | |
695 | channels->type[index] |= | |
696 | cpu_to_le32(IWL_SCAN_OFFLOAD_CHANNEL_PARTIAL); | |
697 | ||
698 | if (s_band->channels[i].flags & IEEE80211_CHAN_NO_HT40) | |
699 | channels->type[index] |= | |
700 | cpu_to_le32(IWL_SCAN_OFFLOAD_CHANNEL_NARROW); | |
701 | ||
702 | /* scan for all SSIDs from req->ssids */ | |
703 | channels->type[index] |= cpu_to_le32(ssid_bitmap); | |
704 | } | |
705 | } | |
706 | ||
707 | int iwl_mvm_config_sched_scan(struct iwl_mvm *mvm, | |
708 | struct ieee80211_vif *vif, | |
709 | struct cfg80211_sched_scan_request *req, | |
710 | struct ieee80211_sched_scan_ies *ies) | |
711 | { | |
712 | int band_2ghz = mvm->nvm_data->bands[IEEE80211_BAND_2GHZ].n_channels; | |
713 | int band_5ghz = mvm->nvm_data->bands[IEEE80211_BAND_5GHZ].n_channels; | |
714 | int head = 0; | |
715 | int tail = band_2ghz + band_5ghz; | |
716 | u32 ssid_bitmap; | |
717 | int cmd_len; | |
718 | int ret; | |
719 | ||
720 | struct iwl_scan_offload_cfg *scan_cfg; | |
721 | struct iwl_host_cmd cmd = { | |
722 | .id = SCAN_OFFLOAD_CONFIG_CMD, | |
723 | .flags = CMD_SYNC, | |
724 | }; | |
725 | ||
726 | lockdep_assert_held(&mvm->mutex); | |
727 | ||
728 | cmd_len = sizeof(struct iwl_scan_offload_cfg) + | |
729 | 2 * SCAN_OFFLOAD_PROBE_REQ_SIZE; | |
730 | ||
731 | scan_cfg = kzalloc(cmd_len, GFP_KERNEL); | |
732 | if (!scan_cfg) | |
733 | return -ENOMEM; | |
734 | ||
735 | iwl_build_scan_cmd(mvm, vif, req, &scan_cfg->scan_cmd); | |
736 | scan_cfg->scan_cmd.len = cpu_to_le16(cmd_len); | |
737 | ||
738 | iwl_scan_offload_build_ssid(req, &scan_cfg->scan_cmd, &ssid_bitmap); | |
739 | /* build tx frames for supported bands */ | |
740 | if (band_2ghz) { | |
741 | iwl_scan_offload_build_tx_cmd(mvm, vif, ies, | |
742 | IEEE80211_BAND_2GHZ, | |
743 | &scan_cfg->scan_cmd.tx_cmd[0], | |
744 | scan_cfg->data); | |
745 | iwl_build_channel_cfg(mvm, req, &scan_cfg->channel_cfg, | |
746 | IEEE80211_BAND_2GHZ, &head, &tail, | |
747 | ssid_bitmap); | |
748 | } | |
749 | if (band_5ghz) { | |
750 | iwl_scan_offload_build_tx_cmd(mvm, vif, ies, | |
751 | IEEE80211_BAND_5GHZ, | |
752 | &scan_cfg->scan_cmd.tx_cmd[1], | |
753 | scan_cfg->data + | |
754 | SCAN_OFFLOAD_PROBE_REQ_SIZE); | |
755 | iwl_build_channel_cfg(mvm, req, &scan_cfg->channel_cfg, | |
756 | IEEE80211_BAND_5GHZ, &head, &tail, | |
757 | ssid_bitmap); | |
758 | } | |
759 | ||
760 | cmd.data[0] = scan_cfg; | |
761 | cmd.len[0] = cmd_len; | |
762 | cmd.dataflags[0] = IWL_HCMD_DFL_NOCOPY; | |
763 | ||
764 | IWL_DEBUG_SCAN(mvm, "Sending scheduled scan config\n"); | |
765 | ||
766 | ret = iwl_mvm_send_cmd(mvm, &cmd); | |
767 | kfree(scan_cfg); | |
768 | return ret; | |
769 | } | |
770 | ||
771 | int iwl_mvm_config_sched_scan_profiles(struct iwl_mvm *mvm, | |
772 | struct cfg80211_sched_scan_request *req) | |
773 | { | |
774 | struct iwl_scan_offload_profile *profile; | |
775 | struct iwl_scan_offload_profile_cfg *profile_cfg; | |
776 | struct iwl_scan_offload_blacklist *blacklist; | |
777 | struct iwl_host_cmd cmd = { | |
778 | .id = SCAN_OFFLOAD_UPDATE_PROFILES_CMD, | |
779 | .flags = CMD_SYNC, | |
780 | .len[1] = sizeof(*profile_cfg), | |
781 | .dataflags[0] = IWL_HCMD_DFL_NOCOPY, | |
782 | .dataflags[1] = IWL_HCMD_DFL_NOCOPY, | |
783 | }; | |
784 | int blacklist_len; | |
785 | int i; | |
786 | int ret; | |
787 | ||
788 | if (WARN_ON(req->n_match_sets > IWL_SCAN_MAX_PROFILES)) | |
789 | return -EIO; | |
790 | ||
791 | if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_SHORT_BL) | |
792 | blacklist_len = IWL_SCAN_SHORT_BLACKLIST_LEN; | |
793 | else | |
794 | blacklist_len = IWL_SCAN_MAX_BLACKLIST_LEN; | |
795 | ||
796 | blacklist = kzalloc(sizeof(*blacklist) * blacklist_len, GFP_KERNEL); | |
797 | if (!blacklist) | |
798 | return -ENOMEM; | |
799 | ||
800 | profile_cfg = kzalloc(sizeof(*profile_cfg), GFP_KERNEL); | |
801 | if (!profile_cfg) { | |
802 | ret = -ENOMEM; | |
803 | goto free_blacklist; | |
804 | } | |
805 | ||
806 | cmd.data[0] = blacklist; | |
807 | cmd.len[0] = sizeof(*blacklist) * blacklist_len; | |
808 | cmd.data[1] = profile_cfg; | |
809 | ||
810 | /* No blacklist configuration */ | |
811 | ||
812 | profile_cfg->num_profiles = req->n_match_sets; | |
813 | profile_cfg->active_clients = SCAN_CLIENT_SCHED_SCAN; | |
814 | profile_cfg->pass_match = SCAN_CLIENT_SCHED_SCAN; | |
815 | profile_cfg->match_notify = SCAN_CLIENT_SCHED_SCAN; | |
816 | if (!req->n_match_sets || !req->match_sets[0].ssid.ssid_len) | |
817 | profile_cfg->any_beacon_notify = SCAN_CLIENT_SCHED_SCAN; | |
818 | ||
819 | for (i = 0; i < req->n_match_sets; i++) { | |
820 | profile = &profile_cfg->profiles[i]; | |
821 | profile->ssid_index = i; | |
822 | /* Support any cipher and auth algorithm */ | |
823 | profile->unicast_cipher = 0xff; | |
824 | profile->auth_alg = 0xff; | |
825 | profile->network_type = IWL_NETWORK_TYPE_ANY; | |
826 | profile->band_selection = IWL_SCAN_OFFLOAD_SELECT_ANY; | |
827 | profile->client_bitmap = SCAN_CLIENT_SCHED_SCAN; | |
828 | } | |
829 | ||
830 | IWL_DEBUG_SCAN(mvm, "Sending scheduled scan profile config\n"); | |
831 | ||
832 | ret = iwl_mvm_send_cmd(mvm, &cmd); | |
833 | kfree(profile_cfg); | |
834 | free_blacklist: | |
835 | kfree(blacklist); | |
836 | ||
837 | return ret; | |
838 | } | |
839 | ||
840 | int iwl_mvm_sched_scan_start(struct iwl_mvm *mvm, | |
841 | struct cfg80211_sched_scan_request *req) | |
842 | { | |
843 | struct iwl_scan_offload_req scan_req = { | |
844 | .watchdog = IWL_SCHED_SCAN_WATCHDOG, | |
845 | ||
846 | .schedule_line[0].iterations = IWL_FAST_SCHED_SCAN_ITERATIONS, | |
847 | .schedule_line[0].delay = req->interval / 1000, | |
848 | .schedule_line[0].full_scan_mul = 1, | |
849 | ||
850 | .schedule_line[1].iterations = 0xff, | |
851 | .schedule_line[1].delay = req->interval / 1000, | |
852 | .schedule_line[1].full_scan_mul = IWL_FULL_SCAN_MULTIPLIER, | |
853 | }; | |
854 | ||
855 | if (req->n_match_sets && req->match_sets[0].ssid.ssid_len) { | |
856 | IWL_DEBUG_SCAN(mvm, | |
857 | "Sending scheduled scan with filtering, filter len %d\n", | |
858 | req->n_match_sets); | |
859 | } else { | |
860 | IWL_DEBUG_SCAN(mvm, | |
861 | "Sending Scheduled scan without filtering\n"); | |
862 | scan_req.flags |= cpu_to_le16(IWL_SCAN_OFFLOAD_FLAG_PASS_ALL); | |
863 | } | |
864 | ||
865 | return iwl_mvm_send_cmd_pdu(mvm, SCAN_OFFLOAD_REQUEST_CMD, CMD_SYNC, | |
866 | sizeof(scan_req), &scan_req); | |
867 | } | |
868 | ||
869 | static int iwl_mvm_send_sched_scan_abort(struct iwl_mvm *mvm) | |
870 | { | |
871 | int ret; | |
872 | struct iwl_host_cmd cmd = { | |
873 | .id = SCAN_OFFLOAD_ABORT_CMD, | |
874 | .flags = CMD_SYNC, | |
875 | }; | |
876 | u32 status; | |
877 | ||
878 | /* Exit instantly with error when device is not ready | |
879 | * to receive scan abort command or it does not perform | |
880 | * scheduled scan currently */ | |
881 | if (mvm->scan_status != IWL_MVM_SCAN_SCHED) | |
882 | return -EIO; | |
883 | ||
884 | ret = iwl_mvm_send_cmd_status(mvm, &cmd, &status); | |
885 | if (ret) | |
886 | return ret; | |
887 | ||
888 | if (status != CAN_ABORT_STATUS) { | |
889 | /* | |
890 | * The scan abort will return 1 for success or | |
891 | * 2 for "failure". A failure condition can be | |
892 | * due to simply not being in an active scan which | |
893 | * can occur if we send the scan abort before the | |
894 | * microcode has notified us that a scan is completed. | |
895 | */ | |
896 | IWL_DEBUG_SCAN(mvm, "SCAN OFFLOAD ABORT ret %d.\n", status); | |
897 | ret = -EIO; | |
898 | } | |
899 | ||
900 | return ret; | |
901 | } | |
902 | ||
903 | void iwl_mvm_sched_scan_stop(struct iwl_mvm *mvm) | |
904 | { | |
905 | int ret; | |
906 | ||
907 | lockdep_assert_held(&mvm->mutex); | |
908 | ||
909 | if (mvm->scan_status != IWL_MVM_SCAN_SCHED) { | |
910 | IWL_DEBUG_SCAN(mvm, "No offloaded scan to stop\n"); | |
911 | return; | |
912 | } | |
913 | ||
914 | ret = iwl_mvm_send_sched_scan_abort(mvm); | |
915 | if (ret) | |
916 | IWL_DEBUG_SCAN(mvm, "Send stop offload scan failed %d\n", ret); | |
917 | else | |
918 | IWL_DEBUG_SCAN(mvm, "Successfully sent stop offload scan\n"); | |
919 | } |