projects / linux-2.6-block.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
Merge tag 'v3.16-rc1' into i2c/for-next
[linux-2.6-block.git] / drivers / net / wireless / iwlwifi / mvm / scan.c
CommitLineData
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
74struct 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
84static 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		 100static inline __le32
101iwl_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
109static inline __le32
110iwl_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 */
133static 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 */
159static 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
166static u16 iwl_mvm_get_passive_dwell(enum ieee80211_band band)
167{
168 return band == IEEE80211_BAND_2GHZ ? 100 + 20 : 100 + 10;
169}
170
171static 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 */
205static 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		 258static 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
268static 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		 292not_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		 301int 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;
328 memset(cmd, 0, sizeof(struct iwl_scan_cmd) +
329 mvm->fw->ucode_capa.max_probe_length +
330 (MAX_NUM_SCAN_CHANNELS * sizeof(struct iwl_scan_channel)));
8a110d9b 331
8ca151b5
JB		 332 cmd->channel_count = (u8)req->n_channels;
333 cmd->quiet_time = cpu_to_le16(IWL_ACTIVE_QUIET_TIME);
334 cmd->quiet_plcp_th = cpu_to_le16(IWL_PLCP_QUIET_THRESH);
335 cmd->rxchain_sel_flags = iwl_mvm_scan_rx_chain(mvm);
8a110d9b 336
50df8a30 337 iwl_mvm_scan_calc_params(mvm, vif, req->n_ssids, &params);
8a110d9b
AB		 338 cmd->max_out_time = cpu_to_le32(params.max_out_time);
339 cmd->suspend_time = cpu_to_le32(params.suspend_time);
50df8a30
AB		 340 if (params.passive_fragmented)
341 cmd->scan_flags |= SCAN_FLAGS_FRAGMENTED_SCAN;
8a110d9b 342
8ca151b5
JB		 343 cmd->rxon_flags = iwl_mvm_scan_rxon_flags(req);
344 cmd->filter_flags = cpu_to_le32(MAC_FILTER_ACCEPT_GRP |
345 MAC_FILTER_IN_BEACON);
d91b06d2
IP		 346
347 if (vif->type == NL80211_IFTYPE_P2P_DEVICE)
348 cmd->type = cpu_to_le32(SCAN_TYPE_DISCOVERY_FORCED);
349 else
350 cmd->type = cpu_to_le32(SCAN_TYPE_FORCED);
351
8ca151b5
JB		 352 cmd->repeats = cpu_to_le32(1);
353
354 /*
355 * If the user asked for passive scan, don't change to active scan if
356 * you see any activity on the channel - remain passive.
357 */
358 if (req->n_ssids > 0) {
359 cmd->passive2active = cpu_to_le16(1);
26e05cc3 360 cmd->scan_flags |= SCAN_FLAGS_PASSIVE2ACTIVE;
20f1a5de
DS		 361 if (basic_ssid) {
362 ssid = req->ssids[0].ssid;
363 ssid_len = req->ssids[0].ssid_len;
364 }
8ca151b5
JB		 365 } else {
366 cmd->passive2active = 0;
26e05cc3 367 cmd->scan_flags &= ~SCAN_FLAGS_PASSIVE2ACTIVE;
8ca151b5
JB		 368 }
369
20f1a5de 370 iwl_mvm_scan_fill_ssids(cmd, req, basic_ssid ? 1 : 0);
8ca151b5 371
8e2a866e
EG		 372 cmd->tx_cmd.tx_flags = cpu_to_le32(TX_CMD_FLG_SEQ_CTL |
373 TX_CMD_FLG_BT_DIS);
8ca151b5
JB		 374 cmd->tx_cmd.sta_id = mvm->aux_sta.sta_id;
375 cmd->tx_cmd.life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE);
376 cmd->tx_cmd.rate_n_flags =
377 iwl_mvm_scan_rate_n_flags(mvm, req->channels[0]->band,
378 req->no_cck);
379
380 cmd->tx_cmd.len =
381 cpu_to_le16(iwl_mvm_fill_probe_req(
382 (struct ieee80211_mgmt *)cmd->data,
383 vif->addr,
384 req->n_ssids, ssid, ssid_len,
385 req->ie, req->ie_len,
386 mvm->fw->ucode_capa.max_probe_length));
387
50df8a30 388 iwl_mvm_scan_fill_channels(cmd, req, basic_ssid, &params);
8ca151b5
JB		 389
390 cmd->len = cpu_to_le16(sizeof(struct iwl_scan_cmd) +
391 le16_to_cpu(cmd->tx_cmd.len) +
392 (cmd->channel_count * sizeof(struct iwl_scan_channel)));
393 hcmd.len[0] = le16_to_cpu(cmd->len);
394
395 status = SCAN_RESPONSE_OK;
396 ret = iwl_mvm_send_cmd_status(mvm, &hcmd, &status);
397 if (!ret && status == SCAN_RESPONSE_OK) {
398 IWL_DEBUG_SCAN(mvm, "Scan request was sent successfully\n");
399 } else {
400 /*
401 * If the scan failed, it usually means that the FW was unable
402 * to allocate the time events. Warn on it, but maybe we
403 * should try to send the command again with different params.
404 */
405 IWL_ERR(mvm, "Scan failed! status 0x%x ret %d\n",
406 status, ret);
407 mvm->scan_status = IWL_MVM_SCAN_NONE;
408 ret = -EIO;
409 }
410 return ret;
411}
412
413int iwl_mvm_rx_scan_response(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
414 struct iwl_device_cmd *cmd)
415{
416 struct iwl_rx_packet *pkt = rxb_addr(rxb);
417 struct iwl_cmd_response *resp = (void *)pkt->data;
418
419 IWL_DEBUG_SCAN(mvm, "Scan response received. status 0x%x\n",
420 le32_to_cpu(resp->status));
421 return 0;
422}
423
424int iwl_mvm_rx_scan_complete(struct iwl_mvm *mvm, struct iwl_rx_cmd_buffer *rxb,
425 struct iwl_device_cmd *cmd)
426{
427 struct iwl_rx_packet *pkt = rxb_addr(rxb);
428 struct iwl_scan_complete_notif *notif = (void *)pkt->data;
429
91b80256
AN		 430 lockdep_assert_held(&mvm->mutex);
431
8ca151b5
JB		 432 IWL_DEBUG_SCAN(mvm, "Scan complete: status=0x%x scanned channels=%d\n",
433 notif->status, notif->scanned_channels);
434
91b80256
AN		 435 if (mvm->scan_status == IWL_MVM_SCAN_OS)
436 mvm->scan_status = IWL_MVM_SCAN_NONE;
8ca151b5
JB		 437 ieee80211_scan_completed(mvm->hw, notif->status != SCAN_COMP_STATUS_OK);
438
519e2026
AN		 439 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
440
8ca151b5
JB		 441 return 0;
442}
443
35a000b7
DS		 444int iwl_mvm_rx_sched_scan_results(struct iwl_mvm *mvm,
445 struct iwl_rx_cmd_buffer *rxb,
446 struct iwl_device_cmd *cmd)
447{
448 struct iwl_rx_packet *pkt = rxb_addr(rxb);
449 struct iwl_sched_scan_results *notif = (void *)pkt->data;
450
451 if (notif->client_bitmap & SCAN_CLIENT_SCHED_SCAN) {
452 IWL_DEBUG_SCAN(mvm, "Scheduled scan results\n");
453 ieee80211_sched_scan_results(mvm->hw);
454 }
455
456 return 0;
457}
458
8ca151b5
JB		 459static bool iwl_mvm_scan_abort_notif(struct iwl_notif_wait_data *notif_wait,
460 struct iwl_rx_packet *pkt, void *data)
461{
462 struct iwl_mvm *mvm =
463 container_of(notif_wait, struct iwl_mvm, notif_wait);
464 struct iwl_scan_complete_notif *notif;
465 u32 *resp;
466
467 switch (pkt->hdr.cmd) {
468 case SCAN_ABORT_CMD:
469 resp = (void *)pkt->data;
470 if (*resp == CAN_ABORT_STATUS) {
471 IWL_DEBUG_SCAN(mvm,
472 "Scan can be aborted, wait until completion\n");
473 return false;
474 }
475
5a3e9f7f
EG		 476 /*
477 * If scan cannot be aborted, it means that we had a
478 * SCAN_COMPLETE_NOTIFICATION in the pipe and it called
479 * ieee80211_scan_completed already.
480 */
8ca151b5
JB		 481 IWL_DEBUG_SCAN(mvm, "Scan cannot be aborted, exit now: %d\n",
482 *resp);
483 return true;
484
485 case SCAN_COMPLETE_NOTIFICATION:
486 notif = (void *)pkt->data;
487 IWL_DEBUG_SCAN(mvm, "Scan aborted: status 0x%x\n",
488 notif->status);
489 return true;
490
491 default:
492 WARN_ON(1);
493 return false;
494 };
495}
496
91b80256 497int iwl_mvm_cancel_scan(struct iwl_mvm *mvm)
8ca151b5
JB		 498{
499 struct iwl_notification_wait wait_scan_abort;
500 static const u8 scan_abort_notif[] = { SCAN_ABORT_CMD,
501 SCAN_COMPLETE_NOTIFICATION };
502 int ret;
503
5a3e9f7f 504 if (mvm->scan_status == IWL_MVM_SCAN_NONE)
91b80256 505 return 0;
5a3e9f7f 506
aaa4e741
EG		 507 if (iwl_mvm_is_radio_killed(mvm)) {
508 ieee80211_scan_completed(mvm->hw, true);
519e2026 509 iwl_mvm_unref(mvm, IWL_MVM_REF_SCAN);
aaa4e741 510 mvm->scan_status = IWL_MVM_SCAN_NONE;
91b80256 511 return 0;
aaa4e741
EG		 512 }
513
8ca151b5
JB		 514 iwl_init_notification_wait(&mvm->notif_wait, &wait_scan_abort,
515 scan_abort_notif,
516 ARRAY_SIZE(scan_abort_notif),
517 iwl_mvm_scan_abort_notif, NULL);
518
a1022927 519 ret = iwl_mvm_send_cmd_pdu(mvm, SCAN_ABORT_CMD, 0, 0, NULL);
8ca151b5
JB		 520 if (ret) {
521 IWL_ERR(mvm, "Couldn't send SCAN_ABORT_CMD: %d\n", ret);
992f81fc 522 /* mac80211's state will be cleaned in the nic_restart flow */
8ca151b5
JB		 523 goto out_remove_notif;
524 }
525
91b80256 526 return iwl_wait_notification(&mvm->notif_wait, &wait_scan_abort, HZ);
8ca151b5
JB		 527
528out_remove_notif:
529 iwl_remove_notification(&mvm->notif_wait, &wait_scan_abort);
91b80256 530 return ret;
8ca151b5 531}
35a000b7
DS		 532
533int iwl_mvm_rx_scan_offload_complete_notif(struct iwl_mvm *mvm,
534 struct iwl_rx_cmd_buffer *rxb,
535 struct iwl_device_cmd *cmd)
536{
537 struct iwl_rx_packet *pkt = rxb_addr(rxb);
538 struct iwl_scan_offload_complete *scan_notif = (void *)pkt->data;
539
a6623e84
JB		 540 /* scan status must be locked for proper checking */
541 lockdep_assert_held(&mvm->mutex);
542
e820c2da
HD		 543 IWL_DEBUG_SCAN(mvm,
544 "Scheduled scan completed, status %s EBS status %s:%d\n",
35a000b7 545 scan_notif->status == IWL_SCAN_OFFLOAD_COMPLETED ?
e820c2da
HD		 546 "completed" : "aborted", scan_notif->ebs_status ==
547 IWL_SCAN_EBS_SUCCESS ? "success" : "failed",
548 scan_notif->ebs_status);
549
35a000b7 550
33ea27f6
AN		 551 /* only call mac80211 completion if the stop was initiated by FW */
552 if (mvm->scan_status == IWL_MVM_SCAN_SCHED) {
a6623e84 553 mvm->scan_status = IWL_MVM_SCAN_NONE;
33ea27f6
AN		 554 ieee80211_sched_scan_stopped(mvm->hw);
555 }
35a000b7 556
e820c2da
HD		 557 mvm->last_ebs_successful = !scan_notif->ebs_status;
558
35a000b7
DS		 559 return 0;
560}
561
562static void iwl_scan_offload_build_tx_cmd(struct iwl_mvm *mvm,
563 struct ieee80211_vif *vif,
564 struct ieee80211_sched_scan_ies *ies,
565 enum ieee80211_band band,
566 struct iwl_tx_cmd *cmd,
567 u8 *data)
568{
569 u16 cmd_len;
570
571 cmd->tx_flags = cpu_to_le32(TX_CMD_FLG_SEQ_CTL);
572 cmd->life_time = cpu_to_le32(TX_CMD_LIFE_TIME_INFINITE);
573 cmd->sta_id = mvm->aux_sta.sta_id;
574
575 cmd->rate_n_flags = iwl_mvm_scan_rate_n_flags(mvm, band, false);
576
577 cmd_len = iwl_mvm_fill_probe_req((struct ieee80211_mgmt *)data,
578 vif->addr,
579 1, NULL, 0,
580 ies->ie[band], ies->len[band],
581 SCAN_OFFLOAD_PROBE_REQ_SIZE);
582 cmd->len = cpu_to_le16(cmd_len);
583}
584
585static void iwl_build_scan_cmd(struct iwl_mvm *mvm,
586 struct ieee80211_vif *vif,
587 struct cfg80211_sched_scan_request *req,
50df8a30
AB		 588 struct iwl_scan_offload_cmd *scan,
589 struct iwl_mvm_scan_params *params)
35a000b7
DS		 590{
591 scan->channel_count =
592 mvm->nvm_data->bands[IEEE80211_BAND_2GHZ].n_channels +
593 mvm->nvm_data->bands[IEEE80211_BAND_5GHZ].n_channels;
594 scan->quiet_time = cpu_to_le16(IWL_ACTIVE_QUIET_TIME);
595 scan->quiet_plcp_th = cpu_to_le16(IWL_PLCP_QUIET_THRESH);
596 scan->good_CRC_th = IWL_GOOD_CRC_TH_DEFAULT;
597 scan->rx_chain = iwl_mvm_scan_rx_chain(mvm);
8a110d9b 598
50df8a30
AB		 599 scan->max_out_time = cpu_to_le32(params->max_out_time);
600 scan->suspend_time = cpu_to_le32(params->suspend_time);
8a110d9b 601
35a000b7
DS		 602 scan->filter_flags |= cpu_to_le32(MAC_FILTER_ACCEPT_GRP |
603 MAC_FILTER_IN_BEACON);
604 scan->scan_type = cpu_to_le32(SCAN_TYPE_BACKGROUND);
605 scan->rep_count = cpu_to_le32(1);
50df8a30
AB		 606
607 if (params->passive_fragmented)
608 scan->scan_flags |= SCAN_FLAGS_FRAGMENTED_SCAN;
35a000b7
DS		 609}
610
611static int iwl_ssid_exist(u8 *ssid, u8 ssid_len, struct iwl_ssid_ie *ssid_list)
612{
613 int i;
614
615 for (i = 0; i < PROBE_OPTION_MAX; i++) {
616 if (!ssid_list[i].len)
617 break;
618 if (ssid_list[i].len == ssid_len &&
619 !memcmp(ssid_list->ssid, ssid, ssid_len))
620 return i;
621 }
622 return -1;
623}
624
625static void iwl_scan_offload_build_ssid(struct cfg80211_sched_scan_request *req,
626 struct iwl_scan_offload_cmd *scan,
627 u32 *ssid_bitmap)
628{
629 int i, j;
630 int index;
631
632 /*
633 * copy SSIDs from match list.
634 * iwl_config_sched_scan_profiles() uses the order of these ssids to
635 * config match list.
636 */
637 for (i = 0; i < req->n_match_sets && i < PROBE_OPTION_MAX; i++) {
ea73cbce
JB		 638 /* skip empty SSID matchsets */
639 if (!req->match_sets[i].ssid.ssid_len)
640 continue;
35a000b7
DS		 641 scan->direct_scan[i].id = WLAN_EID_SSID;
642 scan->direct_scan[i].len = req->match_sets[i].ssid.ssid_len;
643 memcpy(scan->direct_scan[i].ssid, req->match_sets[i].ssid.ssid,
644 scan->direct_scan[i].len);
645 }
646
647 /* add SSIDs from scan SSID list */
648 *ssid_bitmap = 0;
649 for (j = 0; j < req->n_ssids && i < PROBE_OPTION_MAX; j++) {
650 index = iwl_ssid_exist(req->ssids[j].ssid,
651 req->ssids[j].ssid_len,
652 scan->direct_scan);
653 if (index < 0) {
654 if (!req->ssids[j].ssid_len)
655 continue;
656 scan->direct_scan[i].id = WLAN_EID_SSID;
657 scan->direct_scan[i].len = req->ssids[j].ssid_len;
658 memcpy(scan->direct_scan[i].ssid, req->ssids[j].ssid,
659 scan->direct_scan[i].len);
660 *ssid_bitmap |= BIT(i + 1);
661 i++;
662 } else {
663 *ssid_bitmap |= BIT(index + 1);
664 }
665 }
666}
667
668static void iwl_build_channel_cfg(struct iwl_mvm *mvm,
669 struct cfg80211_sched_scan_request *req,
670 struct iwl_scan_channel_cfg *channels,
671 enum ieee80211_band band,
672 int *head, int *tail,
50df8a30
AB		 673 u32 ssid_bitmap,
674 struct iwl_mvm_scan_params *params)
35a000b7
DS		 675{
676 struct ieee80211_supported_band *s_band;
35a000b7 677 int n_channels = req->n_channels;
35a000b7
DS		 678 int i, j, index = 0;
679 bool partial;
680
681 /*
682 * We have to configure all supported channels, even if we don't want to
683 * scan on them, but we have to send channels in the order that we want
684 * to scan. So add requested channels to head of the list and others to
685 * the end.
686 */
35a000b7
DS		 687 s_band = &mvm->nvm_data->bands[band];
688
689 for (i = 0; i < s_band->n_channels && *head <= *tail; i++) {
690 partial = false;
691 for (j = 0; j < n_channels; j++)
692 if (s_band->channels[i].center_freq ==
693 req->channels[j]->center_freq) {
694 index = *head;
695 (*head)++;
696 /*
697 * Channels that came with the request will be
698 * in partial scan .
699 */
700 partial = true;
701 break;
702 }
703 if (!partial) {
704 index = *tail;
705 (*tail)--;
706 }
707 channels->channel_number[index] =
708 cpu_to_le16(ieee80211_frequency_to_channel(
709 s_band->channels[i].center_freq));
50df8a30
AB		 710 channels->dwell_time[index][0] = params->dwell[band].active;
711 channels->dwell_time[index][1] = params->dwell[band].passive;
35a000b7
DS		 712
713 channels->iter_count[index] = cpu_to_le16(1);
714 channels->iter_interval[index] = 0;
715
8fe02e16 716 if (!(s_band->channels[i].flags & IEEE80211_CHAN_NO_IR))
35a000b7
DS		 717 channels->type[index] |=
718 cpu_to_le32(IWL_SCAN_OFFLOAD_CHANNEL_ACTIVE);
719
720 channels->type[index] |=
721 cpu_to_le32(IWL_SCAN_OFFLOAD_CHANNEL_FULL);
722 if (partial)
723 channels->type[index] |=
724 cpu_to_le32(IWL_SCAN_OFFLOAD_CHANNEL_PARTIAL);
725
726 if (s_band->channels[i].flags & IEEE80211_CHAN_NO_HT40)
727 channels->type[index] |=
728 cpu_to_le32(IWL_SCAN_OFFLOAD_CHANNEL_NARROW);
729
730 /* scan for all SSIDs from req->ssids */
731 channels->type[index] |= cpu_to_le32(ssid_bitmap);
732 }
733}
734
735int iwl_mvm_config_sched_scan(struct iwl_mvm *mvm,
736 struct ieee80211_vif *vif,
737 struct cfg80211_sched_scan_request *req,
738 struct ieee80211_sched_scan_ies *ies)
739{
35a000b7
DS		 740 int band_2ghz = mvm->nvm_data->bands[IEEE80211_BAND_2GHZ].n_channels;
741 int band_5ghz = mvm->nvm_data->bands[IEEE80211_BAND_5GHZ].n_channels;
742 int head = 0;
64793110 743 int tail = band_2ghz + band_5ghz - 1;
35a000b7
DS		 744 u32 ssid_bitmap;
745 int cmd_len;
746 int ret;
747
748 struct iwl_scan_offload_cfg *scan_cfg;
749 struct iwl_host_cmd cmd = {
750 .id = SCAN_OFFLOAD_CONFIG_CMD,
35a000b7 751 };
50df8a30 752 struct iwl_mvm_scan_params params = {};
35a000b7
DS		 753
754 lockdep_assert_held(&mvm->mutex);
755
35a000b7 756 cmd_len = sizeof(struct iwl_scan_offload_cfg) +
66092537 757 2 * SCAN_OFFLOAD_PROBE_REQ_SIZE;
35a000b7
DS		 758
759 scan_cfg = kzalloc(cmd_len, GFP_KERNEL);
760 if (!scan_cfg)
761 return -ENOMEM;
762
50df8a30
AB		 763 iwl_mvm_scan_calc_params(mvm, vif, req->n_ssids, &params);
764 iwl_build_scan_cmd(mvm, vif, req, &scan_cfg->scan_cmd, &params);
35a000b7
DS		 765 scan_cfg->scan_cmd.len = cpu_to_le16(cmd_len);
766
767 iwl_scan_offload_build_ssid(req, &scan_cfg->scan_cmd, &ssid_bitmap);
768 /* build tx frames for supported bands */
769 if (band_2ghz) {
770 iwl_scan_offload_build_tx_cmd(mvm, vif, ies,
771 IEEE80211_BAND_2GHZ,
772 &scan_cfg->scan_cmd.tx_cmd[0],
773 scan_cfg->data);
774 iwl_build_channel_cfg(mvm, req, &scan_cfg->channel_cfg,
775 IEEE80211_BAND_2GHZ, &head, &tail,
50df8a30 776 ssid_bitmap, &params);
35a000b7
DS		 777 }
778 if (band_5ghz) {
779 iwl_scan_offload_build_tx_cmd(mvm, vif, ies,
780 IEEE80211_BAND_5GHZ,
781 &scan_cfg->scan_cmd.tx_cmd[1],
782 scan_cfg->data +
783 SCAN_OFFLOAD_PROBE_REQ_SIZE);
784 iwl_build_channel_cfg(mvm, req, &scan_cfg->channel_cfg,
785 IEEE80211_BAND_5GHZ, &head, &tail,
50df8a30 786 ssid_bitmap, &params);
35a000b7
DS		 787 }
788
789 cmd.data[0] = scan_cfg;
790 cmd.len[0] = cmd_len;
791 cmd.dataflags[0] = IWL_HCMD_DFL_NOCOPY;
792
793 IWL_DEBUG_SCAN(mvm, "Sending scheduled scan config\n");
794
795 ret = iwl_mvm_send_cmd(mvm, &cmd);
796 kfree(scan_cfg);
797 return ret;
798}
799
800int iwl_mvm_config_sched_scan_profiles(struct iwl_mvm *mvm,
801 struct cfg80211_sched_scan_request *req)
802{
803 struct iwl_scan_offload_profile *profile;
804 struct iwl_scan_offload_profile_cfg *profile_cfg;
805 struct iwl_scan_offload_blacklist *blacklist;
806 struct iwl_host_cmd cmd = {
807 .id = SCAN_OFFLOAD_UPDATE_PROFILES_CMD,
35a000b7
DS		 808 .len[1] = sizeof(*profile_cfg),
809 .dataflags[0] = IWL_HCMD_DFL_NOCOPY,
810 .dataflags[1] = IWL_HCMD_DFL_NOCOPY,
811 };
812 int blacklist_len;
813 int i;
814 int ret;
815
816 if (WARN_ON(req->n_match_sets > IWL_SCAN_MAX_PROFILES))
817 return -EIO;
818
819 if (mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_SHORT_BL)
820 blacklist_len = IWL_SCAN_SHORT_BLACKLIST_LEN;
821 else
822 blacklist_len = IWL_SCAN_MAX_BLACKLIST_LEN;
823
824 blacklist = kzalloc(sizeof(*blacklist) * blacklist_len, GFP_KERNEL);
825 if (!blacklist)
826 return -ENOMEM;
827
828 profile_cfg = kzalloc(sizeof(*profile_cfg), GFP_KERNEL);
829 if (!profile_cfg) {
830 ret = -ENOMEM;
831 goto free_blacklist;
832 }
833
834 cmd.data[0] = blacklist;
835 cmd.len[0] = sizeof(*blacklist) * blacklist_len;
836 cmd.data[1] = profile_cfg;
837
838 /* No blacklist configuration */
839
840 profile_cfg->num_profiles = req->n_match_sets;
841 profile_cfg->active_clients = SCAN_CLIENT_SCHED_SCAN;
842 profile_cfg->pass_match = SCAN_CLIENT_SCHED_SCAN;
843 profile_cfg->match_notify = SCAN_CLIENT_SCHED_SCAN;
6e0bbe5e
DS		 844 if (!req->n_match_sets || !req->match_sets[0].ssid.ssid_len)
845 profile_cfg->any_beacon_notify = SCAN_CLIENT_SCHED_SCAN;
35a000b7
DS		 846
847 for (i = 0; i < req->n_match_sets; i++) {
848 profile = &profile_cfg->profiles[i];
849 profile->ssid_index = i;
850 /* Support any cipher and auth algorithm */
851 profile->unicast_cipher = 0xff;
852 profile->auth_alg = 0xff;
853 profile->network_type = IWL_NETWORK_TYPE_ANY;
854 profile->band_selection = IWL_SCAN_OFFLOAD_SELECT_ANY;
855 profile->client_bitmap = SCAN_CLIENT_SCHED_SCAN;
856 }
857
858 IWL_DEBUG_SCAN(mvm, "Sending scheduled scan profile config\n");
859
860 ret = iwl_mvm_send_cmd(mvm, &cmd);
861 kfree(profile_cfg);
862free_blacklist:
863 kfree(blacklist);
864
865 return ret;
866}
867
868int iwl_mvm_sched_scan_start(struct iwl_mvm *mvm,
869 struct cfg80211_sched_scan_request *req)
870{
871 struct iwl_scan_offload_req scan_req = {
872 .watchdog = IWL_SCHED_SCAN_WATCHDOG,
873
874 .schedule_line[0].iterations = IWL_FAST_SCHED_SCAN_ITERATIONS,
875 .schedule_line[0].delay = req->interval / 1000,
876 .schedule_line[0].full_scan_mul = 1,
877
878 .schedule_line[1].iterations = 0xff,
879 .schedule_line[1].delay = req->interval / 1000,
880 .schedule_line[1].full_scan_mul = IWL_FULL_SCAN_MULTIPLIER,
881 };
882
883 if (req->n_match_sets && req->match_sets[0].ssid.ssid_len) {
884 IWL_DEBUG_SCAN(mvm,
885 "Sending scheduled scan with filtering, filter len %d\n",
886 req->n_match_sets);
35a000b7
DS		 887 } else {
888 IWL_DEBUG_SCAN(mvm,
889 "Sending Scheduled scan without filtering\n");
de33fb5e 890 scan_req.flags |= cpu_to_le16(IWL_SCAN_OFFLOAD_FLAG_PASS_ALL);
35a000b7
DS		 891 }
892
e820c2da
HD		 893 if (mvm->last_ebs_successful &&
894 mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_EBS_SUPPORT)
895 scan_req.flags |=
896 cpu_to_le16(IWL_SCAN_OFFLOAD_FLAG_EBS_ACCURATE_MODE);
897
a1022927 898 return iwl_mvm_send_cmd_pdu(mvm, SCAN_OFFLOAD_REQUEST_CMD, 0,
35a000b7
DS		 899 sizeof(scan_req), &scan_req);
900}
901
902static int iwl_mvm_send_sched_scan_abort(struct iwl_mvm *mvm)
903{
904 int ret;
905 struct iwl_host_cmd cmd = {
906 .id = SCAN_OFFLOAD_ABORT_CMD,
35a000b7
DS		 907 };
908 u32 status;
909
910 /* Exit instantly with error when device is not ready
911 * to receive scan abort command or it does not perform
912 * scheduled scan currently */
913 if (mvm->scan_status != IWL_MVM_SCAN_SCHED)
914 return -EIO;
915
916 ret = iwl_mvm_send_cmd_status(mvm, &cmd, &status);
917 if (ret)
918 return ret;
919
920 if (status != CAN_ABORT_STATUS) {
921 /*
922 * The scan abort will return 1 for success or
923 * 2 for "failure". A failure condition can be
924 * due to simply not being in an active scan which
925 * can occur if we send the scan abort before the
926 * microcode has notified us that a scan is completed.
927 */
928 IWL_DEBUG_SCAN(mvm, "SCAN OFFLOAD ABORT ret %d.\n", status);
33ea27f6 929 ret = -ENOENT;
35a000b7
DS		 930 }
931
932 return ret;
933}
934
636a2cdc 935int iwl_mvm_sched_scan_stop(struct iwl_mvm *mvm, bool notify)
35a000b7
DS		 936{
937 int ret;
33ea27f6
AN		 938 struct iwl_notification_wait wait_scan_done;
939 static const u8 scan_done_notif[] = { SCAN_OFFLOAD_COMPLETE, };
35a000b7
DS		 940
941 lockdep_assert_held(&mvm->mutex);
942
943 if (mvm->scan_status != IWL_MVM_SCAN_SCHED) {
944 IWL_DEBUG_SCAN(mvm, "No offloaded scan to stop\n");
33ea27f6 945 return 0;
35a000b7
DS		 946 }
947
33ea27f6
AN		 948 iwl_init_notification_wait(&mvm->notif_wait, &wait_scan_done,
949 scan_done_notif,
950 ARRAY_SIZE(scan_done_notif),
951 NULL, NULL);
952
35a000b7 953 ret = iwl_mvm_send_sched_scan_abort(mvm);
33ea27f6 954 if (ret) {
35a000b7 955 IWL_DEBUG_SCAN(mvm, "Send stop offload scan failed %d\n", ret);
33ea27f6
AN		 956 iwl_remove_notification(&mvm->notif_wait, &wait_scan_done);
957 return ret;
958 }
959
960 IWL_DEBUG_SCAN(mvm, "Successfully sent stop offload scan\n");
961
962 ret = iwl_wait_notification(&mvm->notif_wait, &wait_scan_done, 1 * HZ);
963 if (ret)
964 return ret;
965
966 /*
967 * Clear the scan status so the next scan requests will succeed. This
968 * also ensures the Rx handler doesn't do anything, as the scan was
969 * stopped from above.
970 */
971 mvm->scan_status = IWL_MVM_SCAN_NONE;
972
636a2cdc
DS		 973 if (notify)
974 ieee80211_sched_scan_stopped(mvm->hw);
975
33ea27f6 976 return 0;
35a000b7 977}
Linux 6.x block layer and io_uring tree(s)