net/mac80211/driver-ops.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright 2015 Intel Deutschland GmbH
   4  */
   5 #include <net/mac80211.h>
   6 #include "ieee80211_i.h"
   7 #include "trace.h"
   8 #include "driver-ops.h"
   9
  10 int drv_start(struct ieee80211_local *local)
  11 {
  12         int ret;
  13
  14         might_sleep();
  15
  16         if (WARN_ON(local->started))
  17                 return -EALREADY;
  18
  19         trace_drv_start(local);
  20         local->started = true;
  21         /* allow rx frames */
  22         smp_mb();
  23         ret = local->ops->start(&local->hw);
  24         trace_drv_return_int(local, ret);
  25
  26         if (ret)
  27                 local->started = false;
  28
  29         return ret;
  30 }
  31
  32 void drv_stop(struct ieee80211_local *local)
  33 {
  34         might_sleep();
  35
  36         if (WARN_ON(!local->started))
  37                 return;
  38
  39         trace_drv_stop(local);
  40         local->ops->stop(&local->hw);
  41         trace_drv_return_void(local);
  42
  43         /* sync away all work on the tasklet before clearing started */
  44         tasklet_disable(&local->tasklet);
  45         tasklet_enable(&local->tasklet);
  46
  47         barrier();
  48
  49         local->started = false;
  50 }
  51
  52 int drv_add_interface(struct ieee80211_local *local,
  53                       struct ieee80211_sub_if_data *sdata)
  54 {
  55         int ret;
  56
  57         might_sleep();
  58
  59         if (WARN_ON(sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
  60                     (sdata->vif.type == NL80211_IFTYPE_MONITOR &&
  61                      !ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF) &&
  62                      !(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))))
  63                 return -EINVAL;
  64
  65         trace_drv_add_interface(local, sdata);
  66         ret = local->ops->add_interface(&local->hw, &sdata->vif);
  67         trace_drv_return_int(local, ret);
  68
  69         if (ret == 0)
  70                 sdata->flags |= IEEE80211_SDATA_IN_DRIVER;
  71
  72         return ret;
  73 }
  74
  75 int drv_change_interface(struct ieee80211_local *local,
  76                          struct ieee80211_sub_if_data *sdata,
  77                          enum nl80211_iftype type, bool p2p)
  78 {
  79         int ret;
  80
  81         might_sleep();
  82
  83         if (!check_sdata_in_driver(sdata))
  84                 return -EIO;
  85
  86         trace_drv_change_interface(local, sdata, type, p2p);
  87         ret = local->ops->change_interface(&local->hw, &sdata->vif, type, p2p);
  88         trace_drv_return_int(local, ret);
  89         return ret;
  90 }
  91
  92 void drv_remove_interface(struct ieee80211_local *local,
  93                           struct ieee80211_sub_if_data *sdata)
  94 {
  95         might_sleep();
  96
  97         if (!check_sdata_in_driver(sdata))
  98                 return;
  99
 100         trace_drv_remove_interface(local, sdata);
 101         local->ops->remove_interface(&local->hw, &sdata->vif);
 102         sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER;
 103         trace_drv_return_void(local);
 104 }
 105
 106 __must_check
 107 int drv_sta_state(struct ieee80211_local *local,
 108                   struct ieee80211_sub_if_data *sdata,
 109                   struct sta_info *sta,
 110                   enum ieee80211_sta_state old_state,
 111                   enum ieee80211_sta_state new_state)
 112 {
 113         int ret = 0;
 114
 115         might_sleep();
 116
 117         sdata = get_bss_sdata(sdata);
 118         if (!check_sdata_in_driver(sdata))
 119                 return -EIO;
 120
 121         trace_drv_sta_state(local, sdata, &sta->sta, old_state, new_state);
 122         if (local->ops->sta_state) {
 123                 ret = local->ops->sta_state(&local->hw, &sdata->vif, &sta->sta,
 124                                             old_state, new_state);
 125         } else if (old_state == IEEE80211_STA_AUTH &&
 126                    new_state == IEEE80211_STA_ASSOC) {
 127                 ret = drv_sta_add(local, sdata, &sta->sta);
 128                 if (ret == 0)
 129                         sta->uploaded = true;
 130         } else if (old_state == IEEE80211_STA_ASSOC &&
 131                    new_state == IEEE80211_STA_AUTH) {
 132                 drv_sta_remove(local, sdata, &sta->sta);
 133         }
 134         trace_drv_return_int(local, ret);
 135         return ret;
 136 }
 137
 138 __must_check
 139 int drv_sta_set_txpwr(struct ieee80211_local *local,
 140                       struct ieee80211_sub_if_data *sdata,
 141                       struct sta_info *sta)
 142 {
 143         int ret = -EOPNOTSUPP;
 144
 145         might_sleep();
 146
 147         sdata = get_bss_sdata(sdata);
 148         if (!check_sdata_in_driver(sdata))
 149                 return -EIO;
 150
 151         trace_drv_sta_set_txpwr(local, sdata, &sta->sta);
 152         if (local->ops->sta_set_txpwr)
 153                 ret = local->ops->sta_set_txpwr(&local->hw, &sdata->vif,
 154                                                 &sta->sta);
 155         trace_drv_return_int(local, ret);
 156         return ret;
 157 }
 158
 159 void drv_sta_rc_update(struct ieee80211_local *local,
 160                        struct ieee80211_sub_if_data *sdata,
 161                        struct ieee80211_sta *sta, u32 changed)
 162 {
 163         sdata = get_bss_sdata(sdata);
 164         if (!check_sdata_in_driver(sdata))
 165                 return;
 166
 167         WARN_ON(changed & IEEE80211_RC_SUPP_RATES_CHANGED &&
 168                 (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
 169                  sdata->vif.type != NL80211_IFTYPE_MESH_POINT));
 170
 171         trace_drv_sta_rc_update(local, sdata, sta, changed);
 172         if (local->ops->sta_rc_update)
 173                 local->ops->sta_rc_update(&local->hw, &sdata->vif,
 174                                           sta, changed);
 175
 176         trace_drv_return_void(local);
 177 }
 178
 179 int drv_conf_tx(struct ieee80211_local *local,
 180                 struct ieee80211_sub_if_data *sdata, u16 ac,
 181                 const struct ieee80211_tx_queue_params *params)
 182 {
 183         int ret = -EOPNOTSUPP;
 184
 185         might_sleep();
 186
 187         if (!check_sdata_in_driver(sdata))
 188                 return -EIO;
 189
 190         if (params->cw_min == 0 || params->cw_min > params->cw_max) {
 191                 /*
 192                  * If we can't configure hardware anyway, don't warn. We may
 193                  * never have initialized the CW parameters.
 194                  */
 195                 WARN_ONCE(local->ops->conf_tx,
 196                           "%s: invalid CW_min/CW_max: %d/%d\n",
 197                           sdata->name, params->cw_min, params->cw_max);
 198                 return -EINVAL;
 199         }
 200
 201         trace_drv_conf_tx(local, sdata, ac, params);
 202         if (local->ops->conf_tx)
 203                 ret = local->ops->conf_tx(&local->hw, &sdata->vif,
 204                                           ac, params);
 205         trace_drv_return_int(local, ret);
 206         return ret;
 207 }
 208
 209 u64 drv_get_tsf(struct ieee80211_local *local,
 210                 struct ieee80211_sub_if_data *sdata)
 211 {
 212         u64 ret = -1ULL;
 213
 214         might_sleep();
 215
 216         if (!check_sdata_in_driver(sdata))
 217                 return ret;
 218
 219         trace_drv_get_tsf(local, sdata);
 220         if (local->ops->get_tsf)
 221                 ret = local->ops->get_tsf(&local->hw, &sdata->vif);
 222         trace_drv_return_u64(local, ret);
 223         return ret;
 224 }
 225
 226 void drv_set_tsf(struct ieee80211_local *local,
 227                  struct ieee80211_sub_if_data *sdata,
 228                  u64 tsf)
 229 {
 230         might_sleep();
 231
 232         if (!check_sdata_in_driver(sdata))
 233                 return;
 234
 235         trace_drv_set_tsf(local, sdata, tsf);
 236         if (local->ops->set_tsf)
 237                 local->ops->set_tsf(&local->hw, &sdata->vif, tsf);
 238         trace_drv_return_void(local);
 239 }
 240
 241 void drv_offset_tsf(struct ieee80211_local *local,
 242                     struct ieee80211_sub_if_data *sdata,
 243                     s64 offset)
 244 {
 245         might_sleep();
 246
 247         if (!check_sdata_in_driver(sdata))
 248                 return;
 249
 250         trace_drv_offset_tsf(local, sdata, offset);
 251         if (local->ops->offset_tsf)
 252                 local->ops->offset_tsf(&local->hw, &sdata->vif, offset);
 253         trace_drv_return_void(local);
 254 }
 255
 256 void drv_reset_tsf(struct ieee80211_local *local,
 257                    struct ieee80211_sub_if_data *sdata)
 258 {
 259         might_sleep();
 260
 261         if (!check_sdata_in_driver(sdata))
 262                 return;
 263
 264         trace_drv_reset_tsf(local, sdata);
 265         if (local->ops->reset_tsf)
 266                 local->ops->reset_tsf(&local->hw, &sdata->vif);
 267         trace_drv_return_void(local);
 268 }
 269
 270 int drv_switch_vif_chanctx(struct ieee80211_local *local,
 271                            struct ieee80211_vif_chanctx_switch *vifs,
 272                            int n_vifs, enum ieee80211_chanctx_switch_mode mode)
 273 {
 274         int ret = 0;
 275         int i;
 276
 277         might_sleep();
 278
 279         if (!local->ops->switch_vif_chanctx)
 280                 return -EOPNOTSUPP;
 281
 282         for (i = 0; i < n_vifs; i++) {
 283                 struct ieee80211_chanctx *new_ctx =
 284                         container_of(vifs[i].new_ctx,
 285                                      struct ieee80211_chanctx,
 286                                      conf);
 287                 struct ieee80211_chanctx *old_ctx =
 288                         container_of(vifs[i].old_ctx,
 289                                      struct ieee80211_chanctx,
 290                                      conf);
 291
 292                 WARN_ON_ONCE(!old_ctx->driver_present);
 293                 WARN_ON_ONCE((mode == CHANCTX_SWMODE_SWAP_CONTEXTS &&
 294                               new_ctx->driver_present) ||
 295                              (mode == CHANCTX_SWMODE_REASSIGN_VIF &&
 296                               !new_ctx->driver_present));
 297         }
 298
 299         trace_drv_switch_vif_chanctx(local, vifs, n_vifs, mode);
 300         ret = local->ops->switch_vif_chanctx(&local->hw,
 301                                              vifs, n_vifs, mode);
 302         trace_drv_return_int(local, ret);
 303
 304         if (!ret && mode == CHANCTX_SWMODE_SWAP_CONTEXTS) {
 305                 for (i = 0; i < n_vifs; i++) {
 306                         struct ieee80211_chanctx *new_ctx =
 307                                 container_of(vifs[i].new_ctx,
 308                                              struct ieee80211_chanctx,
 309                                              conf);
 310                         struct ieee80211_chanctx *old_ctx =
 311                                 container_of(vifs[i].old_ctx,
 312                                              struct ieee80211_chanctx,
 313                                              conf);
 314
 315                         new_ctx->driver_present = true;
 316                         old_ctx->driver_present = false;
 317                 }
 318         }
 319
 320         return ret;
 321 }
 322
 323 int drv_ampdu_action(struct ieee80211_local *local,
 324                      struct ieee80211_sub_if_data *sdata,
 325                      struct ieee80211_ampdu_params *params)
 326 {
 327         int ret = -EOPNOTSUPP;
 328
 329         might_sleep();
 330
 331         sdata = get_bss_sdata(sdata);
 332         if (!check_sdata_in_driver(sdata))
 333                 return -EIO;
 334
 335         trace_drv_ampdu_action(local, sdata, params);
 336
 337         if (local->ops->ampdu_action)
 338                 ret = local->ops->ampdu_action(&local->hw, &sdata->vif, params);
 339
 340         trace_drv_return_int(local, ret);
 341
 342         return ret;
 343 }