drivers/net/wireless/ti/wl18xx/scan.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * This file is part of wl18xx
   4  *
   5  * Copyright (C) 2012 Texas Instruments. All rights reserved.
   6  */
   7
   8 #include <linux/ieee80211.h>
   9 #include "scan.h"
  10 #include "../wlcore/debug.h"
  11
  12 static void wl18xx_adjust_channels(struct wl18xx_cmd_scan_params *cmd,
  13                                    struct wlcore_scan_channels *cmd_channels)
  14 {
  15         memcpy(cmd->passive, cmd_channels->passive, sizeof(cmd->passive));
  16         memcpy(cmd->active, cmd_channels->active, sizeof(cmd->active));
  17         cmd->dfs = cmd_channels->dfs;
  18         cmd->passive_active = cmd_channels->passive_active;
  19
  20         memcpy(cmd->channels_2, cmd_channels->channels_2,
  21                sizeof(cmd->channels_2));
  22         memcpy(cmd->channels_5, cmd_channels->channels_5,
  23                sizeof(cmd->channels_5));
  24         /* channels_4 are not supported, so no need to copy them */
  25 }
  26
  27 static int wl18xx_scan_send(struct wl1271 *wl, struct wl12xx_vif *wlvif,
  28                             struct cfg80211_scan_request *req)
  29 {
  30         struct wl18xx_cmd_scan_params *cmd;
  31         struct wlcore_scan_channels *cmd_channels = NULL;
  32         int ret;
  33
  34         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
  35         if (!cmd) {
  36                 ret = -ENOMEM;
  37                 goto out;
  38         }
  39
  40         /* scan on the dev role if the regular one is not started */
  41         if (wlcore_is_p2p_mgmt(wlvif))
  42                 cmd->role_id = wlvif->dev_role_id;
  43         else
  44                 cmd->role_id = wlvif->role_id;
  45
  46         if (WARN_ON(cmd->role_id == WL12XX_INVALID_ROLE_ID)) {
  47                 ret = -EINVAL;
  48                 goto out;
  49         }
  50
  51         cmd->scan_type = SCAN_TYPE_SEARCH;
  52         cmd->rssi_threshold = -127;
  53         cmd->snr_threshold = 0;
  54
  55         cmd->bss_type = SCAN_BSS_TYPE_ANY;
  56
  57         cmd->ssid_from_list = 0;
  58         cmd->filter = 0;
  59         cmd->add_broadcast = 0;
  60
  61         cmd->urgency = 0;
  62         cmd->protect = 0;
  63
  64         cmd->n_probe_reqs = wl->conf.scan.num_probe_reqs;
  65         cmd->terminate_after = 0;
  66
  67         /* configure channels */
  68         WARN_ON(req->n_ssids > 1);
  69
  70         cmd_channels = kzalloc(sizeof(*cmd_channels), GFP_KERNEL);
  71         if (!cmd_channels) {
  72                 ret = -ENOMEM;
  73                 goto out;
  74         }
  75
  76         wlcore_set_scan_chan_params(wl, cmd_channels, req->channels,
  77                                     req->n_channels, req->n_ssids,
  78                                     SCAN_TYPE_SEARCH);
  79         wl18xx_adjust_channels(cmd, cmd_channels);
  80
  81         /*
  82          * all the cycles params (except total cycles) should
  83          * remain 0 for normal scan
  84          */
  85         cmd->total_cycles = 1;
  86
  87         if (req->no_cck)
  88                 cmd->rate = WL18XX_SCAN_RATE_6;
  89
  90         cmd->tag = WL1271_SCAN_DEFAULT_TAG;
  91
  92         if (req->n_ssids) {
  93                 cmd->ssid_len = req->ssids[0].ssid_len;
  94                 memcpy(cmd->ssid, req->ssids[0].ssid, cmd->ssid_len);
  95         }
  96
  97         /* TODO: per-band ies? */
  98         if (cmd->active[0]) {
  99                 u8 band = NL80211_BAND_2GHZ;
 100                 ret = wl12xx_cmd_build_probe_req(wl, wlvif,
 101                                  cmd->role_id, band,
 102                                  req->ssids ? req->ssids[0].ssid : NULL,
 103                                  req->ssids ? req->ssids[0].ssid_len : 0,
 104                                  req->ie,
 105                                  req->ie_len,
 106                                  NULL,
 107                                  0,
 108                                  false);
 109                 if (ret < 0) {
 110                         wl1271_error("2.4GHz PROBE request template failed");
 111                         goto out;
 112                 }
 113         }
 114
 115         if (cmd->active[1] || cmd->dfs) {
 116                 u8 band = NL80211_BAND_5GHZ;
 117                 ret = wl12xx_cmd_build_probe_req(wl, wlvif,
 118                                  cmd->role_id, band,
 119                                  req->ssids ? req->ssids[0].ssid : NULL,
 120                                  req->ssids ? req->ssids[0].ssid_len : 0,
 121                                  req->ie,
 122                                  req->ie_len,
 123                                  NULL,
 124                                  0,
 125                                  false);
 126                 if (ret < 0) {
 127                         wl1271_error("5GHz PROBE request template failed");
 128                         goto out;
 129                 }
 130         }
 131
 132         wl1271_dump(DEBUG_SCAN, "SCAN: ", cmd, sizeof(*cmd));
 133
 134         ret = wl1271_cmd_send(wl, CMD_SCAN, cmd, sizeof(*cmd), 0);
 135         if (ret < 0) {
 136                 wl1271_error("SCAN failed");
 137                 goto out;
 138         }
 139
 140 out:
 141         kfree(cmd_channels);
 142         kfree(cmd);
 143         return ret;
 144 }
 145
 146 void wl18xx_scan_completed(struct wl1271 *wl, struct wl12xx_vif *wlvif)
 147 {
 148         wl->scan.failed = false;
 149         cancel_delayed_work(&wl->scan_complete_work);
 150         ieee80211_queue_delayed_work(wl->hw, &wl->scan_complete_work,
 151                                      msecs_to_jiffies(0));
 152 }
 153
 154 static
 155 int wl18xx_scan_sched_scan_config(struct wl1271 *wl,
 156                                   struct wl12xx_vif *wlvif,
 157                                   struct cfg80211_sched_scan_request *req,
 158                                   struct ieee80211_scan_ies *ies)
 159 {
 160         struct wl18xx_cmd_scan_params *cmd;
 161         struct wlcore_scan_channels *cmd_channels = NULL;
 162         struct conf_sched_scan_settings *c = &wl->conf.sched_scan;
 163         int ret;
 164         int filter_type;
 165
 166         wl1271_debug(DEBUG_CMD, "cmd sched_scan scan config");
 167
 168         filter_type = wlcore_scan_sched_scan_ssid_list(wl, wlvif, req);
 169         if (filter_type < 0)
 170                 return filter_type;
 171
 172         cmd = kzalloc(sizeof(*cmd), GFP_KERNEL);
 173         if (!cmd) {
 174                 ret = -ENOMEM;
 175                 goto out;
 176         }
 177
 178         cmd->role_id = wlvif->role_id;
 179
 180         if (WARN_ON(cmd->role_id == WL12XX_INVALID_ROLE_ID)) {
 181                 ret = -EINVAL;
 182                 goto out;
 183         }
 184
 185         cmd->scan_type = SCAN_TYPE_PERIODIC;
 186         cmd->rssi_threshold = c->rssi_threshold;
 187         cmd->snr_threshold = c->snr_threshold;
 188
 189         /* don't filter on BSS type */
 190         cmd->bss_type = SCAN_BSS_TYPE_ANY;
 191
 192         cmd->ssid_from_list = 1;
 193         if (filter_type == SCAN_SSID_FILTER_LIST)
 194                 cmd->filter = 1;
 195         cmd->add_broadcast = 0;
 196
 197         cmd->urgency = 0;
 198         cmd->protect = 0;
 199
 200         cmd->n_probe_reqs = c->num_probe_reqs;
 201         /* don't stop scanning automatically when something is found */
 202         cmd->terminate_after = 0;
 203
 204         cmd_channels = kzalloc(sizeof(*cmd_channels), GFP_KERNEL);
 205         if (!cmd_channels) {
 206                 ret = -ENOMEM;
 207                 goto out;
 208         }
 209
 210         /* configure channels */
 211         wlcore_set_scan_chan_params(wl, cmd_channels, req->channels,
 212                                     req->n_channels, req->n_ssids,
 213                                     SCAN_TYPE_PERIODIC);
 214         wl18xx_adjust_channels(cmd, cmd_channels);
 215
 216         if (c->num_short_intervals && c->long_interval &&
 217             c->long_interval > req->scan_plans[0].interval * MSEC_PER_SEC) {
 218                 cmd->short_cycles_msec =
 219                         cpu_to_le16(req->scan_plans[0].interval * MSEC_PER_SEC);
 220                 cmd->long_cycles_msec = cpu_to_le16(c->long_interval);
 221                 cmd->short_cycles_count = c->num_short_intervals;
 222         } else {
 223                 cmd->short_cycles_msec = 0;
 224                 cmd->long_cycles_msec =
 225                         cpu_to_le16(req->scan_plans[0].interval * MSEC_PER_SEC);
 226                 cmd->short_cycles_count = 0;
 227         }
 228         wl1271_debug(DEBUG_SCAN, "short_interval: %d, long_interval: %d, num_short: %d",
 229                      le16_to_cpu(cmd->short_cycles_msec),
 230                      le16_to_cpu(cmd->long_cycles_msec),
 231                      cmd->short_cycles_count);
 232
 233         cmd->total_cycles = 0;
 234
 235         cmd->tag = WL1271_SCAN_DEFAULT_TAG;
 236
 237         /* create a PERIODIC_SCAN_REPORT_EVENT whenever we've got a match */
 238         cmd->report_threshold = 1;
 239         cmd->terminate_on_report = 0;
 240
 241         if (cmd->active[0]) {
 242                 u8 band = NL80211_BAND_2GHZ;
 243                 ret = wl12xx_cmd_build_probe_req(wl, wlvif,
 244                                  cmd->role_id, band,
 245                                  req->ssids ? req->ssids[0].ssid : NULL,
 246                                  req->ssids ? req->ssids[0].ssid_len : 0,
 247                                  ies->ies[band],
 248                                  ies->len[band],
 249                                  ies->common_ies,
 250                                  ies->common_ie_len,
 251                                  true);
 252                 if (ret < 0) {
 253                         wl1271_error("2.4GHz PROBE request template failed");
 254                         goto out;
 255                 }
 256         }
 257
 258         if (cmd->active[1] || cmd->dfs) {
 259                 u8 band = NL80211_BAND_5GHZ;
 260                 ret = wl12xx_cmd_build_probe_req(wl, wlvif,
 261                                  cmd->role_id, band,
 262                                  req->ssids ? req->ssids[0].ssid : NULL,
 263                                  req->ssids ? req->ssids[0].ssid_len : 0,
 264                                  ies->ies[band],
 265                                  ies->len[band],
 266                                  ies->common_ies,
 267                                  ies->common_ie_len,
 268                                  true);
 269                 if (ret < 0) {
 270                         wl1271_error("5GHz PROBE request template failed");
 271                         goto out;
 272                 }
 273         }
 274
 275         wl1271_dump(DEBUG_SCAN, "SCAN: ", cmd, sizeof(*cmd));
 276
 277         ret = wl1271_cmd_send(wl, CMD_SCAN, cmd, sizeof(*cmd), 0);
 278         if (ret < 0) {
 279                 wl1271_error("SCAN failed");
 280                 goto out;
 281         }
 282
 283 out:
 284         kfree(cmd_channels);
 285         kfree(cmd);
 286         return ret;
 287 }
 288
 289 int wl18xx_sched_scan_start(struct wl1271 *wl, struct wl12xx_vif *wlvif,
 290                             struct cfg80211_sched_scan_request *req,
 291                             struct ieee80211_scan_ies *ies)
 292 {
 293         return wl18xx_scan_sched_scan_config(wl, wlvif, req, ies);
 294 }
 295
 296 static int __wl18xx_scan_stop(struct wl1271 *wl, struct wl12xx_vif *wlvif,
 297                                u8 scan_type)
 298 {
 299         struct wl18xx_cmd_scan_stop *stop;
 300         int ret;
 301
 302         wl1271_debug(DEBUG_CMD, "cmd periodic scan stop");
 303
 304         stop = kzalloc(sizeof(*stop), GFP_KERNEL);
 305         if (!stop) {
 306                 wl1271_error("failed to alloc memory to send sched scan stop");
 307                 return -ENOMEM;
 308         }
 309
 310         stop->role_id = wlvif->role_id;
 311         stop->scan_type = scan_type;
 312
 313         ret = wl1271_cmd_send(wl, CMD_STOP_SCAN, stop, sizeof(*stop), 0);
 314         if (ret < 0) {
 315                 wl1271_error("failed to send sched scan stop command");
 316                 goto out_free;
 317         }
 318
 319 out_free:
 320         kfree(stop);
 321         return ret;
 322 }
 323
 324 void wl18xx_scan_sched_scan_stop(struct wl1271 *wl, struct wl12xx_vif *wlvif)
 325 {
 326         __wl18xx_scan_stop(wl, wlvif, SCAN_TYPE_PERIODIC);
 327 }
 328 int wl18xx_scan_start(struct wl1271 *wl, struct wl12xx_vif *wlvif,
 329                       struct cfg80211_scan_request *req)
 330 {
 331         return wl18xx_scan_send(wl, wlvif, req);
 332 }
 333
 334 int wl18xx_scan_stop(struct wl1271 *wl, struct wl12xx_vif *wlvif)
 335 {
 336         return __wl18xx_scan_stop(wl, wlvif, SCAN_TYPE_SEARCH);
 337 }