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8ca151b5 JB |
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 | * | |
51368bf7 | 8 | * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved. |
8ca151b5 JB |
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 | |
410dc5aa | 25 | * in the file called COPYING. |
8ca151b5 JB |
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 | * | |
51368bf7 | 33 | * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved. |
8ca151b5 JB |
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 | |
8a110d9b AB |
73 | |
74 | struct iwl_mvm_scan_params { | |
75 | u32 max_out_time; | |
76 | u32 suspend_time; | |
50df8a30 AB |
77 | bool passive_fragmented; |
78 | struct _dwell { | |
79 | u16 passive; | |
80 | u16 active; | |
81 | } dwell[IEEE80211_NUM_BANDS]; | |
8a110d9b | 82 | }; |
8ca151b5 JB |
83 | |
84 | static inline __le16 iwl_mvm_scan_rx_chain(struct iwl_mvm *mvm) | |
85 | { | |
86 | u16 rx_chain; | |
91b05d10 | 87 | u8 rx_ant; |
8ca151b5 | 88 | |
91b05d10 OG |
89 | if (mvm->scan_rx_ant != ANT_NONE) |
90 | rx_ant = mvm->scan_rx_ant; | |
91 | else | |
4ed735e7 | 92 | rx_ant = mvm->fw->valid_rx_ant; |
8ca151b5 JB |
93 | rx_chain = rx_ant << PHY_RX_CHAIN_VALID_POS; |
94 | rx_chain |= rx_ant << PHY_RX_CHAIN_FORCE_MIMO_SEL_POS; | |
95 | rx_chain |= rx_ant << PHY_RX_CHAIN_FORCE_SEL_POS; | |
96 | rx_chain |= 0x1 << PHY_RX_CHAIN_DRIVER_FORCE_POS; | |
97 | return cpu_to_le16(rx_chain); | |
98 | } | |
99 | ||
8ca151b5 JB |
100 | static inline __le32 |
101 | iwl_mvm_scan_rxon_flags(struct cfg80211_scan_request *req) | |
102 | { | |
103 | if (req->channels[0]->band == IEEE80211_BAND_2GHZ) | |
104 | return cpu_to_le32(PHY_BAND_24); | |
105 | else | |
106 | return cpu_to_le32(PHY_BAND_5); | |
107 | } | |
108 | ||
109 | static inline __le32 | |
110 | iwl_mvm_scan_rate_n_flags(struct iwl_mvm *mvm, enum ieee80211_band band, | |
111 | bool no_cck) | |
112 | { | |
113 | u32 tx_ant; | |
114 | ||
115 | mvm->scan_last_antenna_idx = | |
4ed735e7 | 116 | iwl_mvm_next_antenna(mvm, mvm->fw->valid_tx_ant, |
8ca151b5 JB |
117 | mvm->scan_last_antenna_idx); |
118 | tx_ant = BIT(mvm->scan_last_antenna_idx) << RATE_MCS_ANT_POS; | |
119 | ||
120 | if (band == IEEE80211_BAND_2GHZ && !no_cck) | |
121 | return cpu_to_le32(IWL_RATE_1M_PLCP | RATE_MCS_CCK_MSK | | |
122 | tx_ant); | |
123 | else | |
124 | return cpu_to_le32(IWL_RATE_6M_PLCP | tx_ant); | |
125 | } | |
126 | ||
127 | /* | |
128 | * We insert the SSIDs in an inverted order, because the FW will | |
129 | * invert it back. The most prioritized SSID, which is first in the | |
130 | * request list, is not copied here, but inserted directly to the probe | |
131 | * request. | |
132 | */ | |
133 | static void iwl_mvm_scan_fill_ssids(struct iwl_scan_cmd *cmd, | |
20f1a5de DS |
134 | struct cfg80211_scan_request *req, |
135 | int first) | |
8ca151b5 JB |
136 | { |
137 | int fw_idx, req_idx; | |
138 | ||
20f1a5de | 139 | for (req_idx = req->n_ssids - 1, fw_idx = 0; req_idx >= first; |
fe04e837 | 140 | req_idx--, fw_idx++) { |
8ca151b5 JB |
141 | cmd->direct_scan[fw_idx].id = WLAN_EID_SSID; |
142 | cmd->direct_scan[fw_idx].len = req->ssids[req_idx].ssid_len; | |
143 | memcpy(cmd->direct_scan[fw_idx].ssid, | |
144 | req->ssids[req_idx].ssid, | |
145 | req->ssids[req_idx].ssid_len); | |
146 | } | |
147 | } | |
148 | ||
149 | /* | |
150 | * If req->n_ssids > 0, it means we should do an active scan. | |
151 | * In case of active scan w/o directed scan, we receive a zero-length SSID | |
152 | * just to notify that this scan is active and not passive. | |
153 | * In order to notify the FW of the number of SSIDs we wish to scan (including | |
154 | * the zero-length one), we need to set the corresponding bits in chan->type, | |
20f1a5de DS |
155 | * one for each SSID, and set the active bit (first). If the first SSID is |
156 | * already included in the probe template, so we need to set only | |
157 | * req->n_ssids - 1 bits in addition to the first bit. | |
8ca151b5 JB |
158 | */ |
159 | static u16 iwl_mvm_get_active_dwell(enum ieee80211_band band, int n_ssids) | |
160 | { | |
161 | if (band == IEEE80211_BAND_2GHZ) | |
162 | return 30 + 3 * (n_ssids + 1); | |
163 | return 20 + 2 * (n_ssids + 1); | |
164 | } | |
165 | ||
166 | static u16 iwl_mvm_get_passive_dwell(enum ieee80211_band band) | |
167 | { | |
168 | return band == IEEE80211_BAND_2GHZ ? 100 + 20 : 100 + 10; | |
169 | } | |
170 | ||
171 | static void iwl_mvm_scan_fill_channels(struct iwl_scan_cmd *cmd, | |
20f1a5de | 172 | struct cfg80211_scan_request *req, |
50df8a30 AB |
173 | bool basic_ssid, |
174 | struct iwl_mvm_scan_params *params) | |
8ca151b5 | 175 | { |
8ca151b5 JB |
176 | struct iwl_scan_channel *chan = (struct iwl_scan_channel *) |
177 | (cmd->data + le16_to_cpu(cmd->tx_cmd.len)); | |
178 | int i; | |
20f1a5de | 179 | int type = BIT(req->n_ssids) - 1; |
50df8a30 | 180 | enum ieee80211_band band = req->channels[0]->band; |
20f1a5de DS |
181 | |
182 | if (!basic_ssid) | |
183 | type |= BIT(req->n_ssids); | |
8ca151b5 JB |
184 | |
185 | for (i = 0; i < cmd->channel_count; i++) { | |
186 | chan->channel = cpu_to_le16(req->channels[i]->hw_value); | |
20f1a5de | 187 | chan->type = cpu_to_le32(type); |
8fe02e16 | 188 | if (req->channels[i]->flags & IEEE80211_CHAN_NO_IR) |
bb963c4a | 189 | chan->type &= cpu_to_le32(~SCAN_CHANNEL_TYPE_ACTIVE); |
50df8a30 AB |
190 | chan->active_dwell = cpu_to_le16(params->dwell[band].active); |
191 | chan->passive_dwell = cpu_to_le16(params->dwell[band].passive); | |
8ca151b5 JB |
192 | chan->iteration_count = cpu_to_le16(1); |
193 | chan++; | |
194 | } | |
195 | } | |
196 | ||
197 | /* | |
198 | * Fill in probe request with the following parameters: | |
199 | * TA is our vif HW address, which mac80211 ensures we have. | |
200 | * Packet is broadcasted, so this is both SA and DA. | |
201 | * The probe request IE is made out of two: first comes the most prioritized | |
202 | * SSID if a directed scan is requested. Second comes whatever extra | |
203 | * information was given to us as the scan request IE. | |
204 | */ | |
205 | static u16 iwl_mvm_fill_probe_req(struct ieee80211_mgmt *frame, const u8 *ta, | |
206 | int n_ssids, const u8 *ssid, int ssid_len, | |
207 | const u8 *ie, int ie_len, | |
208 | int left) | |
209 | { | |
210 | int len = 0; | |
211 | u8 *pos = NULL; | |
212 | ||
213 | /* Make sure there is enough space for the probe request, | |
214 | * two mandatory IEs and the data */ | |
215 | left -= 24; | |
216 | if (left < 0) | |
217 | return 0; | |
218 | ||
219 | frame->frame_control = cpu_to_le16(IEEE80211_STYPE_PROBE_REQ); | |
220 | eth_broadcast_addr(frame->da); | |
221 | memcpy(frame->sa, ta, ETH_ALEN); | |
222 | eth_broadcast_addr(frame->bssid); | |
223 | frame->seq_ctrl = 0; | |
224 | ||
225 | len += 24; | |
226 | ||
227 | /* for passive scans, no need to fill anything */ | |
228 | if (n_ssids == 0) | |
229 | return (u16)len; | |
230 | ||
231 | /* points to the payload of the request */ | |
232 | pos = &frame->u.probe_req.variable[0]; | |
233 | ||
234 | /* fill in our SSID IE */ | |
235 | left -= ssid_len + 2; | |
236 | if (left < 0) | |
237 | return 0; | |
238 | *pos++ = WLAN_EID_SSID; | |
239 | *pos++ = ssid_len; | |
240 | if (ssid && ssid_len) { /* ssid_len may be == 0 even if ssid is valid */ | |
241 | memcpy(pos, ssid, ssid_len); | |
242 | pos += ssid_len; | |
243 | } | |
244 | ||
245 | len += ssid_len + 2; | |
246 | ||
247 | if (WARN_ON(left < ie_len)) | |
248 | return len; | |
249 | ||
250 | if (ie && ie_len) { | |
251 | memcpy(pos, ie, ie_len); | |
252 | len += ie_len; | |
253 | } | |
254 | ||
255 | return (u16)len; | |
256 | } | |
257 | ||
8a110d9b AB |
258 | static void iwl_mvm_scan_condition_iterator(void *data, u8 *mac, |
259 | struct ieee80211_vif *vif) | |
61f6325d | 260 | { |
8a110d9b AB |
261 | struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); |
262 | bool *global_bound = data; | |
61f6325d | 263 | |
8a110d9b AB |
264 | if (mvmvif->phy_ctxt && mvmvif->phy_ctxt->id < MAX_PHYS) |
265 | *global_bound = true; | |
266 | } | |
267 | ||
268 | static void iwl_mvm_scan_calc_params(struct iwl_mvm *mvm, | |
50df8a30 AB |
269 | struct ieee80211_vif *vif, |
270 | int n_ssids, | |
8a110d9b AB |
271 | struct iwl_mvm_scan_params *params) |
272 | { | |
273 | bool global_bound = false; | |
50df8a30 | 274 | enum ieee80211_band band; |
8a110d9b AB |
275 | |
276 | ieee80211_iterate_active_interfaces_atomic(mvm->hw, | |
277 | IEEE80211_IFACE_ITER_NORMAL, | |
278 | iwl_mvm_scan_condition_iterator, | |
279 | &global_bound); | |
ef67f18d AB |
280 | |
281 | if (!global_bound) | |
282 | goto not_bound; | |
283 | ||
284 | params->suspend_time = 100; | |
285 | params->max_out_time = 600; | |
286 | ||
287 | if (iwl_mvm_low_latency(mvm)) { | |
288 | params->suspend_time = 250; | |
289 | params->max_out_time = 250; | |
50df8a30 | 290 | } |
8a110d9b | 291 | |
ef67f18d AB |
292 | not_bound: |
293 | ||
50df8a30 | 294 | for (band = IEEE80211_BAND_2GHZ; band < IEEE80211_NUM_BANDS; band++) { |
ef67f18d | 295 | params->dwell[band].passive = iwl_mvm_get_passive_dwell(band); |
50df8a30 AB |
296 | params->dwell[band].active = iwl_mvm_get_active_dwell(band, |
297 | n_ssids); | |
298 | } | |
61f6325d HD |
299 | } |
300 | ||
8ca151b5 JB |
301 | int iwl_mvm_scan_request(struct iwl_mvm *mvm, |
302 | struct ieee80211_vif *vif, | |
303 | struct cfg80211_scan_request *req) | |
304 | { | |
305 | struct iwl_host_cmd hcmd = { | |
306 | .id = SCAN_REQUEST_CMD, | |
307 | .len = { 0, }, | |
308 | .data = { mvm->scan_cmd, }, | |
8ca151b5 JB |
309 | .dataflags = { IWL_HCMD_DFL_NOCOPY, }, |
310 | }; | |
311 | struct iwl_scan_cmd *cmd = mvm->scan_cmd; | |
312 | int ret; | |
313 | u32 status; | |
314 | int ssid_len = 0; | |
315 | u8 *ssid = NULL; | |
20f1a5de DS |
316 | bool basic_ssid = !(mvm->fw->ucode_capa.flags & |
317 | IWL_UCODE_TLV_FLAGS_NO_BASIC_SSID); | |
8a110d9b | 318 | struct iwl_mvm_scan_params params = {}; |
8ca151b5 JB |
319 | |
320 | lockdep_assert_held(&mvm->mutex); | |
748fa67c EG |
321 | |
322 | /* we should have failed registration if scan_cmd was NULL */ | |
323 | if (WARN_ON(mvm->scan_cmd == NULL)) | |
324 | return -ENOMEM; | |
8ca151b5 JB |
325 | |
326 | IWL_DEBUG_SCAN(mvm, "Handling mac80211 scan request\n"); | |
327 | mvm->scan_status = IWL_MVM_SCAN_OS; | |
0564679b | 328 | memset(cmd, 0, ksize(cmd)); |
8a110d9b | 329 | |
8ca151b5 JB |
330 | cmd->channel_count = (u8)req->n_channels; |
331 | cmd->quiet_time = cpu_to_le16(IWL_ACTIVE_QUIET_TIME); | |
332 | cmd->quiet_plcp_th = cpu_to_le16(IWL_PLCP_QUIET_THRESH); | |
333 | cmd->rxchain_sel_flags = iwl_mvm_scan_rx_chain(mvm); | |
8a110d9b | 334 | |
50df8a30 | 335 | iwl_mvm_scan_calc_params(mvm, vif, req->n_ssids, ¶ms); |
8a110d9b AB |
336 | cmd->max_out_time = cpu_to_le32(params.max_out_time); |
337 | cmd->suspend_time = cpu_to_le32(params.suspend_time); | |
50df8a30 AB |
338 | if (params.passive_fragmented) |
339 | cmd->scan_flags |= SCAN_FLAGS_FRAGMENTED_SCAN; | |
8a110d9b | 340 | |
8ca151b5 JB |
341 | cmd->rxon_flags = iwl_mvm_scan_rxon_flags(req); |
342 | cmd->filter_flags = cpu_to_le32(MAC_FILTER_ACCEPT_GRP | | |
343 | MAC_FILTER_IN_BEACON); | |
d91b06d2 IP |
344 | |
345 | if (vif->type == NL80211_IFTYPE_P2P_DEVICE) | |
346 | cmd->type = cpu_to_le32(SCAN_TYPE_DISCOVERY_FORCED); | |
347 | else | |
348 | cmd->type = cpu_to_le32(SCAN_TYPE_FORCED); | |
349 | ||
8ca151b5 JB |
350 | cmd->repeats = cpu_to_le32(1); |
351 | ||
352 | /* | |
353 | * If the user asked for passive scan, don't change to active scan if | |
354 | * you see any activity on the channel - remain passive. | |
355 | */ | |
356 | if (req->n_ssids > 0) { | |
357 | cmd->passive2active = cpu_to_le16(1); | |
26e05cc3 | 358 | cmd->scan_flags |= SCAN_FLAGS_PASSIVE2ACTIVE; |
20f1a5de DS |
359 | if (basic_ssid) { |
360 | ssid = req->ssids[0].ssid; | |
361 | ssid_len = req->ssids[0].ssid_len; | |
362 | } | |
8ca151b5 JB |
363 | } else { |
364 | cmd->passive2active = 0; | |
26e05cc3 | 365 | cmd->scan_flags &= ~SCAN_FLAGS_PASSIVE2ACTIVE; |
8ca151b5 JB |
366 | } |
367 | ||
20f1a5de | 368 | iwl_mvm_scan_fill_ssids(cmd, req, basic_ssid ? 1 : 0); |
8ca151b5 | 369 | |
8e2a866e EG |
370 | cmd->tx_cmd.tx_flags = cpu_to_le32(TX_CMD_FLG_SEQ_CTL | |
371 | TX_CMD_FLG_BT_DIS); | |
8ca151b5 JB |
372 | cmd->tx_cmd.sta_id = mvm->aux_sta.sta_id; |
373 | cmd->tx_cmd.life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE); | |
374 | cmd->tx_cmd.rate_n_flags = | |
375 | iwl_mvm_scan_rate_n_flags(mvm, req->channels[0]->band, | |
376 | req->no_cck); | |
377 | ||
378 | cmd->tx_cmd.len = | |
379 | cpu_to_le16(iwl_mvm_fill_probe_req( | |
380 | (struct ieee80211_mgmt *)cmd->data, | |
381 | vif->addr, | |
382 | req->n_ssids, ssid, ssid_len, | |
383 | req->ie, req->ie_len, | |
384 | mvm->fw->ucode_capa.max_probe_length)); | |
385 | ||
50df8a30 | 386 | iwl_mvm_scan_fill_channels(cmd, req, basic_ssid, ¶ms); |
8ca151b5 JB |
387 | |
388 | cmd->len = cpu_to_le16(sizeof(struct iwl_scan_cmd) + | |
389 | le16_to_cpu(cmd->tx_cmd.len) + | |
390 | (cmd->channel_count * sizeof(struct iwl_scan_channel))); | |
391 | hcmd.len[0] = le16_to_cpu(cmd->len); | |
392 | ||
393 | status = SCAN_RESPONSE_OK; | |
394 | ret = iwl_mvm_send_cmd_status(mvm, &hcmd, &status); | |
395 | if (!ret && status == SCAN_RESPONSE_OK) { | |
396 | IWL_DEBUG_SCAN(mvm, "Scan request was sent successfully\n"); | |
397 | } else { | |
398 | /* | |
399 | * If the scan failed, it usually means that the FW was unable | |
400 | * to allocate the time events. Warn on it, but maybe we | |
401 | * should try to send the command again with different params. | |
402 | */ | |
403 | IWL_ERR(mvm, "Scan failed! status 0x%x ret %d\n", | |
404 | status, ret); | |
405 | mvm->scan_status = IWL_MVM_SCAN_NONE; | |
406 | ret = -EIO; | |
407 | } | |
408 | return ret; | |
409 | } | |
410 | ||
411 | int iwl_mvm_rx_scan_response(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb, | |
412 | struct iwl_device_cmd *cmd) | |
413 | { | |
414 | struct iwl_rx_packet *pkt = rxb_addr(rxb); | |
415 | struct iwl_cmd_response *resp = (void *)pkt->data; | |
416 | ||
417 | IWL_DEBUG_SCAN(mvm, "Scan response received. status 0x%x\n", | |
418 | le32_to_cpu(resp->status)); | |
419 | return 0; | |
420 | } | |
421 | ||
422 | int iwl_mvm_rx_scan_complete(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb, | |
423 | struct iwl_device_cmd *cmd) | |
424 | { | |
425 | struct iwl_rx_packet *pkt = rxb_addr(rxb); | |
426 | struct iwl_scan_complete_notif *notif = (void *)pkt->data; | |
427 | ||
91b80256 AN |
428 | lockdep_assert_held(&mvm->mutex); |
429 | ||
8ca151b5 JB |
430 | IWL_DEBUG_SCAN(mvm, "Scan complete: status=0x%x scanned channels=%d\n", |
431 | notif->status, notif->scanned_channels); | |
432 | ||
91b80256 AN |
433 | if (mvm->scan_status == IWL_MVM_SCAN_OS) |
434 | mvm->scan_status = IWL_MVM_SCAN_NONE; | |
8ca151b5 JB |
435 | ieee80211_scan_completed(mvm->hw, notif->status != SCAN_COMP_STATUS_OK); |
436 | ||
519e2026 AN |
437 | iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN); |
438 | ||
8ca151b5 JB |
439 | return 0; |
440 | } | |
441 | ||
35a000b7 DS |
442 | int iwl_mvm_rx_sched_scan_results(struct iwl_mvm *mvm, |
443 | struct iwl_rx_cmd_buffer *rxb, | |
444 | struct iwl_device_cmd *cmd) | |
445 | { | |
446 | struct iwl_rx_packet *pkt = rxb_addr(rxb); | |
447 | struct iwl_sched_scan_results *notif = (void *)pkt->data; | |
448 | ||
449 | if (notif->client_bitmap & SCAN_CLIENT_SCHED_SCAN) { | |
450 | IWL_DEBUG_SCAN(mvm, "Scheduled scan results\n"); | |
451 | ieee80211_sched_scan_results(mvm->hw); | |
452 | } | |
453 | ||
454 | return 0; | |
455 | } | |
456 | ||
8ca151b5 JB |
457 | static bool iwl_mvm_scan_abort_notif(struct iwl_notif_wait_data *notif_wait, |
458 | struct iwl_rx_packet *pkt, void *data) | |
459 | { | |
460 | struct iwl_mvm *mvm = | |
461 | container_of(notif_wait, struct iwl_mvm, notif_wait); | |
462 | struct iwl_scan_complete_notif *notif; | |
463 | u32 *resp; | |
464 | ||
465 | switch (pkt->hdr.cmd) { | |
466 | case SCAN_ABORT_CMD: | |
467 | resp = (void *)pkt->data; | |
468 | if (*resp == CAN_ABORT_STATUS) { | |
469 | IWL_DEBUG_SCAN(mvm, | |
470 | "Scan can be aborted, wait until completion\n"); | |
471 | return false; | |
472 | } | |
473 | ||
5a3e9f7f EG |
474 | /* |
475 | * If scan cannot be aborted, it means that we had a | |
476 | * SCAN_COMPLETE_NOTIFICATION in the pipe and it called | |
477 | * ieee80211_scan_completed already. | |
478 | */ | |
8ca151b5 JB |
479 | IWL_DEBUG_SCAN(mvm, "Scan cannot be aborted, exit now: %d\n", |
480 | *resp); | |
481 | return true; | |
482 | ||
483 | case SCAN_COMPLETE_NOTIFICATION: | |
484 | notif = (void *)pkt->data; | |
485 | IWL_DEBUG_SCAN(mvm, "Scan aborted: status 0x%x\n", | |
486 | notif->status); | |
487 | return true; | |
488 | ||
489 | default: | |
490 | WARN_ON(1); | |
491 | return false; | |
492 | }; | |
493 | } | |
494 | ||
91b80256 | 495 | int iwl_mvm_cancel_scan(struct iwl_mvm *mvm) |
8ca151b5 JB |
496 | { |
497 | struct iwl_notification_wait wait_scan_abort; | |
498 | static const u8 scan_abort_notif[] = { SCAN_ABORT_CMD, | |
499 | SCAN_COMPLETE_NOTIFICATION }; | |
500 | int ret; | |
501 | ||
5a3e9f7f | 502 | if (mvm->scan_status == IWL_MVM_SCAN_NONE) |
91b80256 | 503 | return 0; |
5a3e9f7f | 504 | |
aaa4e741 EG |
505 | if (iwl_mvm_is_radio_killed(mvm)) { |
506 | ieee80211_scan_completed(mvm->hw, true); | |
519e2026 | 507 | iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN); |
aaa4e741 | 508 | mvm->scan_status = IWL_MVM_SCAN_NONE; |
91b80256 | 509 | return 0; |
aaa4e741 EG |
510 | } |
511 | ||
8ca151b5 JB |
512 | iwl_init_notification_wait(&mvm->notif_wait, &wait_scan_abort, |
513 | scan_abort_notif, | |
514 | ARRAY_SIZE(scan_abort_notif), | |
515 | iwl_mvm_scan_abort_notif, NULL); | |
516 | ||
a1022927 | 517 | ret = iwl_mvm_send_cmd_pdu(mvm, SCAN_ABORT_CMD, 0, 0, NULL); |
8ca151b5 JB |
518 | if (ret) { |
519 | IWL_ERR(mvm, "Couldn't send SCAN_ABORT_CMD: %d\n", ret); | |
992f81fc | 520 | /* mac80211's state will be cleaned in the nic_restart flow */ |
8ca151b5 JB |
521 | goto out_remove_notif; |
522 | } | |
523 | ||
91b80256 | 524 | return iwl_wait_notification(&mvm->notif_wait, &wait_scan_abort, HZ); |
8ca151b5 JB |
525 | |
526 | out_remove_notif: | |
527 | iwl_remove_notification(&mvm->notif_wait, &wait_scan_abort); | |
91b80256 | 528 | return ret; |
8ca151b5 | 529 | } |
35a000b7 DS |
530 | |
531 | int iwl_mvm_rx_scan_offload_complete_notif(struct iwl_mvm *mvm, | |
532 | struct iwl_rx_cmd_buffer *rxb, | |
533 | struct iwl_device_cmd *cmd) | |
534 | { | |
535 | struct iwl_rx_packet *pkt = rxb_addr(rxb); | |
536 | struct iwl_scan_offload_complete *scan_notif = (void *)pkt->data; | |
537 | ||
a6623e84 JB |
538 | /* scan status must be locked for proper checking */ |
539 | lockdep_assert_held(&mvm->mutex); | |
540 | ||
e820c2da HD |
541 | IWL_DEBUG_SCAN(mvm, |
542 | "Scheduled scan completed, status %s EBS status %s:%d\n", | |
35a000b7 | 543 | scan_notif->status == IWL_SCAN_OFFLOAD_COMPLETED ? |
e820c2da HD |
544 | "completed" : "aborted", scan_notif->ebs_status == |
545 | IWL_SCAN_EBS_SUCCESS ? "success" : "failed", | |
546 | scan_notif->ebs_status); | |
547 | ||
35a000b7 | 548 | |
33ea27f6 AN |
549 | /* only call mac80211 completion if the stop was initiated by FW */ |
550 | if (mvm->scan_status == IWL_MVM_SCAN_SCHED) { | |
a6623e84 | 551 | mvm->scan_status = IWL_MVM_SCAN_NONE; |
33ea27f6 AN |
552 | ieee80211_sched_scan_stopped(mvm->hw); |
553 | } | |
35a000b7 | 554 | |
e820c2da HD |
555 | mvm->last_ebs_successful = !scan_notif->ebs_status; |
556 | ||
35a000b7 DS |
557 | return 0; |
558 | } | |
559 | ||
560 | static void iwl_scan_offload_build_tx_cmd(struct iwl_mvm *mvm, | |
561 | struct ieee80211_vif *vif, | |
562 | struct ieee80211_sched_scan_ies *ies, | |
563 | enum ieee80211_band band, | |
564 | struct iwl_tx_cmd *cmd, | |
565 | u8 *data) | |
566 | { | |
567 | u16 cmd_len; | |
568 | ||
569 | cmd->tx_flags = cpu_to_le32(TX_CMD_FLG_SEQ_CTL); | |
570 | cmd->life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE); | |
571 | cmd->sta_id = mvm->aux_sta.sta_id; | |
572 | ||
573 | cmd->rate_n_flags = iwl_mvm_scan_rate_n_flags(mvm, band, false); | |
574 | ||
575 | cmd_len = iwl_mvm_fill_probe_req((struct ieee80211_mgmt *)data, | |
576 | vif->addr, | |
577 | 1, NULL, 0, | |
578 | ies->ie[band], ies->len[band], | |
579 | SCAN_OFFLOAD_PROBE_REQ_SIZE); | |
580 | cmd->len = cpu_to_le16(cmd_len); | |
581 | } | |
582 | ||
583 | static void iwl_build_scan_cmd(struct iwl_mvm *mvm, | |
584 | struct ieee80211_vif *vif, | |
585 | struct cfg80211_sched_scan_request *req, | |
50df8a30 AB |
586 | struct iwl_scan_offload_cmd *scan, |
587 | struct iwl_mvm_scan_params *params) | |
35a000b7 DS |
588 | { |
589 | scan->channel_count = | |
590 | mvm->nvm_data->bands[IEEE80211_BAND_2GHZ].n_channels + | |
591 | mvm->nvm_data->bands[IEEE80211_BAND_5GHZ].n_channels; | |
592 | scan->quiet_time = cpu_to_le16(IWL_ACTIVE_QUIET_TIME); | |
593 | scan->quiet_plcp_th = cpu_to_le16(IWL_PLCP_QUIET_THRESH); | |
594 | scan->good_CRC_th = IWL_GOOD_CRC_TH_DEFAULT; | |
595 | scan->rx_chain = iwl_mvm_scan_rx_chain(mvm); | |
8a110d9b | 596 | |
50df8a30 AB |
597 | scan->max_out_time = cpu_to_le32(params->max_out_time); |
598 | scan->suspend_time = cpu_to_le32(params->suspend_time); | |
8a110d9b | 599 | |
35a000b7 DS |
600 | scan->filter_flags |= cpu_to_le32(MAC_FILTER_ACCEPT_GRP | |
601 | MAC_FILTER_IN_BEACON); | |
602 | scan->scan_type = cpu_to_le32(SCAN_TYPE_BACKGROUND); | |
603 | scan->rep_count = cpu_to_le32(1); | |
50df8a30 AB |
604 | |
605 | if (params->passive_fragmented) | |
606 | scan->scan_flags |= SCAN_FLAGS_FRAGMENTED_SCAN; | |
35a000b7 DS |
607 | } |
608 | ||
609 | static int iwl_ssid_exist(u8 *ssid, u8 ssid_len, struct iwl_ssid_ie *ssid_list) | |
610 | { | |
611 | int i; | |
612 | ||
613 | for (i = 0; i < PROBE_OPTION_MAX; i++) { | |
614 | if (!ssid_list[i].len) | |
615 | break; | |
616 | if (ssid_list[i].len == ssid_len && | |
617 | !memcmp(ssid_list->ssid, ssid, ssid_len)) | |
618 | return i; | |
619 | } | |
620 | return -1; | |
621 | } | |
622 | ||
623 | static void iwl_scan_offload_build_ssid(struct cfg80211_sched_scan_request *req, | |
624 | struct iwl_scan_offload_cmd *scan, | |
625 | u32 *ssid_bitmap) | |
626 | { | |
627 | int i, j; | |
628 | int index; | |
629 | ||
630 | /* | |
631 | * copy SSIDs from match list. | |
632 | * iwl_config_sched_scan_profiles() uses the order of these ssids to | |
633 | * config match list. | |
634 | */ | |
635 | for (i = 0; i < req->n_match_sets && i < PROBE_OPTION_MAX; i++) { | |
ea73cbce JB |
636 | /* skip empty SSID matchsets */ |
637 | if (!req->match_sets[i].ssid.ssid_len) | |
638 | continue; | |
35a000b7 DS |
639 | scan->direct_scan[i].id = WLAN_EID_SSID; |
640 | scan->direct_scan[i].len = req->match_sets[i].ssid.ssid_len; | |
641 | memcpy(scan->direct_scan[i].ssid, req->match_sets[i].ssid.ssid, | |
642 | scan->direct_scan[i].len); | |
643 | } | |
644 | ||
645 | /* add SSIDs from scan SSID list */ | |
646 | *ssid_bitmap = 0; | |
647 | for (j = 0; j < req->n_ssids && i < PROBE_OPTION_MAX; j++) { | |
648 | index = iwl_ssid_exist(req->ssids[j].ssid, | |
649 | req->ssids[j].ssid_len, | |
650 | scan->direct_scan); | |
651 | if (index < 0) { | |
652 | if (!req->ssids[j].ssid_len) | |
653 | continue; | |
654 | scan->direct_scan[i].id = WLAN_EID_SSID; | |
655 | scan->direct_scan[i].len = req->ssids[j].ssid_len; | |
656 | memcpy(scan->direct_scan[i].ssid, req->ssids[j].ssid, | |
657 | scan->direct_scan[i].len); | |
658 | *ssid_bitmap |= BIT(i + 1); | |
659 | i++; | |
660 | } else { | |
661 | *ssid_bitmap |= BIT(index + 1); | |
662 | } | |
663 | } | |
664 | } | |
665 | ||
666 | static void iwl_build_channel_cfg(struct iwl_mvm *mvm, | |
667 | struct cfg80211_sched_scan_request *req, | |
668 | struct iwl_scan_channel_cfg *channels, | |
669 | enum ieee80211_band band, | |
670 | int *head, int *tail, | |
50df8a30 AB |
671 | u32 ssid_bitmap, |
672 | struct iwl_mvm_scan_params *params) | |
35a000b7 DS |
673 | { |
674 | struct ieee80211_supported_band *s_band; | |
35a000b7 | 675 | int n_channels = req->n_channels; |
35a000b7 DS |
676 | int i, j, index = 0; |
677 | bool partial; | |
678 | ||
679 | /* | |
680 | * We have to configure all supported channels, even if we don't want to | |
681 | * scan on them, but we have to send channels in the order that we want | |
682 | * to scan. So add requested channels to head of the list and others to | |
683 | * the end. | |
684 | */ | |
35a000b7 DS |
685 | s_band = &mvm->nvm_data->bands[band]; |
686 | ||
687 | for (i = 0; i < s_band->n_channels && *head <= *tail; i++) { | |
688 | partial = false; | |
689 | for (j = 0; j < n_channels; j++) | |
690 | if (s_band->channels[i].center_freq == | |
691 | req->channels[j]->center_freq) { | |
692 | index = *head; | |
693 | (*head)++; | |
694 | /* | |
695 | * Channels that came with the request will be | |
696 | * in partial scan . | |
697 | */ | |
698 | partial = true; | |
699 | break; | |
700 | } | |
701 | if (!partial) { | |
702 | index = *tail; | |
703 | (*tail)--; | |
704 | } | |
705 | channels->channel_number[index] = | |
706 | cpu_to_le16(ieee80211_frequency_to_channel( | |
707 | s_band->channels[i].center_freq)); | |
50df8a30 AB |
708 | channels->dwell_time[index][0] = params->dwell[band].active; |
709 | channels->dwell_time[index][1] = params->dwell[band].passive; | |
35a000b7 DS |
710 | |
711 | channels->iter_count[index] = cpu_to_le16(1); | |
712 | channels->iter_interval[index] = 0; | |
713 | ||
8fe02e16 | 714 | if (!(s_band->channels[i].flags & IEEE80211_CHAN_NO_IR)) |
35a000b7 DS |
715 | channels->type[index] |= |
716 | cpu_to_le32(IWL_SCAN_OFFLOAD_CHANNEL_ACTIVE); | |
717 | ||
718 | channels->type[index] |= | |
719 | cpu_to_le32(IWL_SCAN_OFFLOAD_CHANNEL_FULL); | |
720 | if (partial) | |
721 | channels->type[index] |= | |
722 | cpu_to_le32(IWL_SCAN_OFFLOAD_CHANNEL_PARTIAL); | |
723 | ||
724 | if (s_band->channels[i].flags & IEEE80211_CHAN_NO_HT40) | |
725 | channels->type[index] |= | |
726 | cpu_to_le32(IWL_SCAN_OFFLOAD_CHANNEL_NARROW); | |
727 | ||
728 | /* scan for all SSIDs from req->ssids */ | |
729 | channels->type[index] |= cpu_to_le32(ssid_bitmap); | |
730 | } | |
731 | } | |
732 | ||
733 | int iwl_mvm_config_sched_scan(struct iwl_mvm *mvm, | |
734 | struct ieee80211_vif *vif, | |
735 | struct cfg80211_sched_scan_request *req, | |
736 | struct ieee80211_sched_scan_ies *ies) | |
737 | { | |
35a000b7 DS |
738 | int band_2ghz = mvm->nvm_data->bands[IEEE80211_BAND_2GHZ].n_channels; |
739 | int band_5ghz = mvm->nvm_data->bands[IEEE80211_BAND_5GHZ].n_channels; | |
740 | int head = 0; | |
64793110 | 741 | int tail = band_2ghz + band_5ghz - 1; |
35a000b7 DS |
742 | u32 ssid_bitmap; |
743 | int cmd_len; | |
744 | int ret; | |
745 | ||
746 | struct iwl_scan_offload_cfg *scan_cfg; | |
747 | struct iwl_host_cmd cmd = { | |
748 | .id = SCAN_OFFLOAD_CONFIG_CMD, | |
35a000b7 | 749 | }; |
50df8a30 | 750 | struct iwl_mvm_scan_params params = {}; |
35a000b7 DS |
751 | |
752 | lockdep_assert_held(&mvm->mutex); | |
753 | ||
35a000b7 | 754 | cmd_len = sizeof(struct iwl_scan_offload_cfg) + |
66092537 | 755 | 2 * SCAN_OFFLOAD_PROBE_REQ_SIZE; |
35a000b7 DS |
756 | |
757 | scan_cfg = kzalloc(cmd_len, GFP_KERNEL); | |
758 | if (!scan_cfg) | |
759 | return -ENOMEM; | |
760 | ||
50df8a30 AB |
761 | iwl_mvm_scan_calc_params(mvm, vif, req->n_ssids, ¶ms); |
762 | iwl_build_scan_cmd(mvm, vif, req, &scan_cfg->scan_cmd, ¶ms); | |
35a000b7 DS |
763 | scan_cfg->scan_cmd.len = cpu_to_le16(cmd_len); |
764 | ||
765 | iwl_scan_offload_build_ssid(req, &scan_cfg->scan_cmd, &ssid_bitmap); | |
766 | /* build tx frames for supported bands */ | |
767 | if (band_2ghz) { | |
768 | iwl_scan_offload_build_tx_cmd(mvm, vif, ies, | |
769 | IEEE80211_BAND_2GHZ, | |
770 | &scan_cfg->scan_cmd.tx_cmd[0], | |
771 | scan_cfg->data); | |
772 | iwl_build_channel_cfg(mvm, req, &scan_cfg->channel_cfg, | |
773 | IEEE80211_BAND_2GHZ, &head, &tail, | |
50df8a30 | 774 | ssid_bitmap, ¶ms); |
35a000b7 DS |
775 | } |
776 | if (band_5ghz) { | |
777 | iwl_scan_offload_build_tx_cmd(mvm, vif, ies, | |
778 | IEEE80211_BAND_5GHZ, | |
779 | &scan_cfg->scan_cmd.tx_cmd[1], | |
780 | scan_cfg->data + | |
781 | SCAN_OFFLOAD_PROBE_REQ_SIZE); | |
782 | iwl_build_channel_cfg(mvm, req, &scan_cfg->channel_cfg, | |
783 | IEEE80211_BAND_5GHZ, &head, &tail, | |
50df8a30 | 784 | ssid_bitmap, ¶ms); |
35a000b7 DS |
785 | } |
786 | ||
787 | cmd.data[0] = scan_cfg; | |
788 | cmd.len[0] = cmd_len; | |
789 | cmd.dataflags[0] = IWL_HCMD_DFL_NOCOPY; | |
790 | ||
791 | IWL_DEBUG_SCAN(mvm, "Sending scheduled scan config\n"); | |
792 | ||
793 | ret = iwl_mvm_send_cmd(mvm, &cmd); | |
794 | kfree(scan_cfg); | |
795 | return ret; | |
796 | } | |
797 | ||
798 | int iwl_mvm_config_sched_scan_profiles(struct iwl_mvm *mvm, | |
799 | struct cfg80211_sched_scan_request *req) | |
800 | { | |
801 | struct iwl_scan_offload_profile *profile; | |
802 | struct iwl_scan_offload_profile_cfg *profile_cfg; | |
803 | struct iwl_scan_offload_blacklist *blacklist; | |
804 | struct iwl_host_cmd cmd = { | |
805 | .id = SCAN_OFFLOAD_UPDATE_PROFILES_CMD, | |
35a000b7 DS |
806 | .len[1] = sizeof(*profile_cfg), |
807 | .dataflags[0] = IWL_HCMD_DFL_NOCOPY, | |
808 | .dataflags[1] = IWL_HCMD_DFL_NOCOPY, | |
809 | }; | |
810 | int blacklist_len; | |
811 | int i; | |
812 | int ret; | |
813 | ||
814 | if (WARN_ON(req->n_match_sets > IWL_SCAN_MAX_PROFILES)) | |
815 | return -EIO; | |
816 | ||
817 | if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_SHORT_BL) | |
818 | blacklist_len = IWL_SCAN_SHORT_BLACKLIST_LEN; | |
819 | else | |
820 | blacklist_len = IWL_SCAN_MAX_BLACKLIST_LEN; | |
821 | ||
822 | blacklist = kzalloc(sizeof(*blacklist) * blacklist_len, GFP_KERNEL); | |
823 | if (!blacklist) | |
824 | return -ENOMEM; | |
825 | ||
826 | profile_cfg = kzalloc(sizeof(*profile_cfg), GFP_KERNEL); | |
827 | if (!profile_cfg) { | |
828 | ret = -ENOMEM; | |
829 | goto free_blacklist; | |
830 | } | |
831 | ||
832 | cmd.data[0] = blacklist; | |
833 | cmd.len[0] = sizeof(*blacklist) * blacklist_len; | |
834 | cmd.data[1] = profile_cfg; | |
835 | ||
836 | /* No blacklist configuration */ | |
837 | ||
838 | profile_cfg->num_profiles = req->n_match_sets; | |
839 | profile_cfg->active_clients = SCAN_CLIENT_SCHED_SCAN; | |
840 | profile_cfg->pass_match = SCAN_CLIENT_SCHED_SCAN; | |
841 | profile_cfg->match_notify = SCAN_CLIENT_SCHED_SCAN; | |
6e0bbe5e DS |
842 | if (!req->n_match_sets || !req->match_sets[0].ssid.ssid_len) |
843 | profile_cfg->any_beacon_notify = SCAN_CLIENT_SCHED_SCAN; | |
35a000b7 DS |
844 | |
845 | for (i = 0; i < req->n_match_sets; i++) { | |
846 | profile = &profile_cfg->profiles[i]; | |
847 | profile->ssid_index = i; | |
848 | /* Support any cipher and auth algorithm */ | |
849 | profile->unicast_cipher = 0xff; | |
850 | profile->auth_alg = 0xff; | |
851 | profile->network_type = IWL_NETWORK_TYPE_ANY; | |
852 | profile->band_selection = IWL_SCAN_OFFLOAD_SELECT_ANY; | |
853 | profile->client_bitmap = SCAN_CLIENT_SCHED_SCAN; | |
854 | } | |
855 | ||
856 | IWL_DEBUG_SCAN(mvm, "Sending scheduled scan profile config\n"); | |
857 | ||
858 | ret = iwl_mvm_send_cmd(mvm, &cmd); | |
859 | kfree(profile_cfg); | |
860 | free_blacklist: | |
861 | kfree(blacklist); | |
862 | ||
863 | return ret; | |
864 | } | |
865 | ||
866 | int iwl_mvm_sched_scan_start(struct iwl_mvm *mvm, | |
867 | struct cfg80211_sched_scan_request *req) | |
868 | { | |
869 | struct iwl_scan_offload_req scan_req = { | |
870 | .watchdog = IWL_SCHED_SCAN_WATCHDOG, | |
871 | ||
872 | .schedule_line[0].iterations = IWL_FAST_SCHED_SCAN_ITERATIONS, | |
873 | .schedule_line[0].delay = req->interval / 1000, | |
874 | .schedule_line[0].full_scan_mul = 1, | |
875 | ||
876 | .schedule_line[1].iterations = 0xff, | |
877 | .schedule_line[1].delay = req->interval / 1000, | |
878 | .schedule_line[1].full_scan_mul = IWL_FULL_SCAN_MULTIPLIER, | |
879 | }; | |
880 | ||
881 | if (req->n_match_sets && req->match_sets[0].ssid.ssid_len) { | |
882 | IWL_DEBUG_SCAN(mvm, | |
883 | "Sending scheduled scan with filtering, filter len %d\n", | |
884 | req->n_match_sets); | |
35a000b7 DS |
885 | } else { |
886 | IWL_DEBUG_SCAN(mvm, | |
887 | "Sending Scheduled scan without filtering\n"); | |
de33fb5e | 888 | scan_req.flags |= cpu_to_le16(IWL_SCAN_OFFLOAD_FLAG_PASS_ALL); |
35a000b7 DS |
889 | } |
890 | ||
e820c2da HD |
891 | if (mvm->last_ebs_successful && |
892 | mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_EBS_SUPPORT) | |
893 | scan_req.flags |= | |
894 | cpu_to_le16(IWL_SCAN_OFFLOAD_FLAG_EBS_ACCURATE_MODE); | |
895 | ||
a1022927 | 896 | return iwl_mvm_send_cmd_pdu(mvm, SCAN_OFFLOAD_REQUEST_CMD, 0, |
35a000b7 DS |
897 | sizeof(scan_req), &scan_req); |
898 | } | |
899 | ||
900 | static int iwl_mvm_send_sched_scan_abort(struct iwl_mvm *mvm) | |
901 | { | |
902 | int ret; | |
903 | struct iwl_host_cmd cmd = { | |
904 | .id = SCAN_OFFLOAD_ABORT_CMD, | |
35a000b7 DS |
905 | }; |
906 | u32 status; | |
907 | ||
908 | /* Exit instantly with error when device is not ready | |
909 | * to receive scan abort command or it does not perform | |
910 | * scheduled scan currently */ | |
911 | if (mvm->scan_status != IWL_MVM_SCAN_SCHED) | |
912 | return -EIO; | |
913 | ||
914 | ret = iwl_mvm_send_cmd_status(mvm, &cmd, &status); | |
915 | if (ret) | |
916 | return ret; | |
917 | ||
918 | if (status != CAN_ABORT_STATUS) { | |
919 | /* | |
920 | * The scan abort will return 1 for success or | |
921 | * 2 for "failure". A failure condition can be | |
922 | * due to simply not being in an active scan which | |
923 | * can occur if we send the scan abort before the | |
924 | * microcode has notified us that a scan is completed. | |
925 | */ | |
926 | IWL_DEBUG_SCAN(mvm, "SCAN OFFLOAD ABORT ret %d.\n", status); | |
33ea27f6 | 927 | ret = -ENOENT; |
35a000b7 DS |
928 | } |
929 | ||
930 | return ret; | |
931 | } | |
932 | ||
636a2cdc | 933 | int iwl_mvm_sched_scan_stop(struct iwl_mvm *mvm, bool notify) |
35a000b7 DS |
934 | { |
935 | int ret; | |
33ea27f6 AN |
936 | struct iwl_notification_wait wait_scan_done; |
937 | static const u8 scan_done_notif[] = { SCAN_OFFLOAD_COMPLETE, }; | |
35a000b7 DS |
938 | |
939 | lockdep_assert_held(&mvm->mutex); | |
940 | ||
941 | if (mvm->scan_status != IWL_MVM_SCAN_SCHED) { | |
942 | IWL_DEBUG_SCAN(mvm, "No offloaded scan to stop\n"); | |
33ea27f6 | 943 | return 0; |
35a000b7 DS |
944 | } |
945 | ||
33ea27f6 AN |
946 | iwl_init_notification_wait(&mvm->notif_wait, &wait_scan_done, |
947 | scan_done_notif, | |
948 | ARRAY_SIZE(scan_done_notif), | |
949 | NULL, NULL); | |
950 | ||
35a000b7 | 951 | ret = iwl_mvm_send_sched_scan_abort(mvm); |
33ea27f6 | 952 | if (ret) { |
35a000b7 | 953 | IWL_DEBUG_SCAN(mvm, "Send stop offload scan failed %d\n", ret); |
33ea27f6 AN |
954 | iwl_remove_notification(&mvm->notif_wait, &wait_scan_done); |
955 | return ret; | |
956 | } | |
957 | ||
958 | IWL_DEBUG_SCAN(mvm, "Successfully sent stop offload scan\n"); | |
959 | ||
960 | ret = iwl_wait_notification(&mvm->notif_wait, &wait_scan_done, 1 * HZ); | |
961 | if (ret) | |
962 | return ret; | |
963 | ||
964 | /* | |
965 | * Clear the scan status so the next scan requests will succeed. This | |
966 | * also ensures the Rx handler doesn't do anything, as the scan was | |
967 | * stopped from above. | |
968 | */ | |
969 | mvm->scan_status = IWL_MVM_SCAN_NONE; | |
970 | ||
636a2cdc DS |
971 | if (notify) |
972 | ieee80211_sched_scan_stopped(mvm->hw); | |
973 | ||
33ea27f6 | 974 | return 0; |
35a000b7 | 975 | } |