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                         if (rcu_access_pointer(sta->sta.rates))
 131                                 drv_sta_rate_tbl_update(local, sdata, &sta->sta);
 132                 }
 133         } else if (old_state == IEEE80211_STA_ASSOC &&
 134                    new_state == IEEE80211_STA_AUTH) {
 135                 drv_sta_remove(local, sdata, &sta->sta);
 136         }
 137         trace_drv_return_int(local, ret);
 138         return ret;
 139 }
 140
 141 __must_check
 142 int drv_sta_set_txpwr(struct ieee80211_local *local,
 143                       struct ieee80211_sub_if_data *sdata,
 144                       struct sta_info *sta)
 145 {
 146         int ret = -EOPNOTSUPP;
 147
 148         might_sleep();
 149
 150         sdata = get_bss_sdata(sdata);
 151         if (!check_sdata_in_driver(sdata))
 152                 return -EIO;
 153
 154         trace_drv_sta_set_txpwr(local, sdata, &sta->sta);
 155         if (local->ops->sta_set_txpwr)
 156                 ret = local->ops->sta_set_txpwr(&local->hw, &sdata->vif,
 157                                                 &sta->sta);
 158         trace_drv_return_int(local, ret);
 159         return ret;
 160 }
 161
 162 void drv_sta_rc_update(struct ieee80211_local *local,
 163                        struct ieee80211_sub_if_data *sdata,
 164                        struct ieee80211_sta *sta, u32 changed)
 165 {
 166         sdata = get_bss_sdata(sdata);
 167         if (!check_sdata_in_driver(sdata))
 168                 return;
 169
 170         WARN_ON(changed & IEEE80211_RC_SUPP_RATES_CHANGED &&
 171                 (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
 172                  sdata->vif.type != NL80211_IFTYPE_MESH_POINT));
 173
 174         trace_drv_sta_rc_update(local, sdata, sta, changed);
 175         if (local->ops->sta_rc_update)
 176                 local->ops->sta_rc_update(&local->hw, &sdata->vif,
 177                                           sta, changed);
 178
 179         trace_drv_return_void(local);
 180 }
 181
 182 int drv_conf_tx(struct ieee80211_local *local,
 183                 struct ieee80211_sub_if_data *sdata, u16 ac,
 184                 const struct ieee80211_tx_queue_params *params)
 185 {
 186         int ret = -EOPNOTSUPP;
 187
 188         might_sleep();
 189
 190         if (!check_sdata_in_driver(sdata))
 191                 return -EIO;
 192
 193         if (params->cw_min == 0 || params->cw_min > params->cw_max) {
 194                 /*
 195                  * If we can't configure hardware anyway, don't warn. We may
 196                  * never have initialized the CW parameters.
 197                  */
 198                 WARN_ONCE(local->ops->conf_tx,
 199                           "%s: invalid CW_min/CW_max: %d/%d\n",
 200                           sdata->name, params->cw_min, params->cw_max);
 201                 return -EINVAL;
 202         }
 203
 204         trace_drv_conf_tx(local, sdata, ac, params);
 205         if (local->ops->conf_tx)
 206                 ret = local->ops->conf_tx(&local->hw, &sdata->vif,
 207                                           ac, params);
 208         trace_drv_return_int(local, ret);
 209         return ret;
 210 }
 211
 212 u64 drv_get_tsf(struct ieee80211_local *local,
 213                 struct ieee80211_sub_if_data *sdata)
 214 {
 215         u64 ret = -1ULL;
 216
 217         might_sleep();
 218
 219         if (!check_sdata_in_driver(sdata))
 220                 return ret;
 221
 222         trace_drv_get_tsf(local, sdata);
 223         if (local->ops->get_tsf)
 224                 ret = local->ops->get_tsf(&local->hw, &sdata->vif);
 225         trace_drv_return_u64(local, ret);
 226         return ret;
 227 }
 228
 229 void drv_set_tsf(struct ieee80211_local *local,
 230                  struct ieee80211_sub_if_data *sdata,
 231                  u64 tsf)
 232 {
 233         might_sleep();
 234
 235         if (!check_sdata_in_driver(sdata))
 236                 return;
 237
 238         trace_drv_set_tsf(local, sdata, tsf);
 239         if (local->ops->set_tsf)
 240                 local->ops->set_tsf(&local->hw, &sdata->vif, tsf);
 241         trace_drv_return_void(local);
 242 }
 243
 244 void drv_offset_tsf(struct ieee80211_local *local,
 245                     struct ieee80211_sub_if_data *sdata,
 246                     s64 offset)
 247 {
 248         might_sleep();
 249
 250         if (!check_sdata_in_driver(sdata))
 251                 return;
 252
 253         trace_drv_offset_tsf(local, sdata, offset);
 254         if (local->ops->offset_tsf)
 255                 local->ops->offset_tsf(&local->hw, &sdata->vif, offset);
 256         trace_drv_return_void(local);
 257 }
 258
 259 void drv_reset_tsf(struct ieee80211_local *local,
 260                    struct ieee80211_sub_if_data *sdata)
 261 {
 262         might_sleep();
 263
 264         if (!check_sdata_in_driver(sdata))
 265                 return;
 266
 267         trace_drv_reset_tsf(local, sdata);
 268         if (local->ops->reset_tsf)
 269                 local->ops->reset_tsf(&local->hw, &sdata->vif);
 270         trace_drv_return_void(local);
 271 }
 272
 273 int drv_switch_vif_chanctx(struct ieee80211_local *local,
 274                            struct ieee80211_vif_chanctx_switch *vifs,
 275                            int n_vifs, enum ieee80211_chanctx_switch_mode mode)
 276 {
 277         int ret = 0;
 278         int i;
 279
 280         might_sleep();
 281
 282         if (!local->ops->switch_vif_chanctx)
 283                 return -EOPNOTSUPP;
 284
 285         for (i = 0; i < n_vifs; i++) {
 286                 struct ieee80211_chanctx *new_ctx =
 287                         container_of(vifs[i].new_ctx,
 288                                      struct ieee80211_chanctx,
 289                                      conf);
 290                 struct ieee80211_chanctx *old_ctx =
 291                         container_of(vifs[i].old_ctx,
 292                                      struct ieee80211_chanctx,
 293                                      conf);
 294
 295                 WARN_ON_ONCE(!old_ctx->driver_present);
 296                 WARN_ON_ONCE((mode == CHANCTX_SWMODE_SWAP_CONTEXTS &&
 297                               new_ctx->driver_present) ||
 298                              (mode == CHANCTX_SWMODE_REASSIGN_VIF &&
 299                               !new_ctx->driver_present));
 300         }
 301
 302         trace_drv_switch_vif_chanctx(local, vifs, n_vifs, mode);
 303         ret = local->ops->switch_vif_chanctx(&local->hw,
 304                                              vifs, n_vifs, mode);
 305         trace_drv_return_int(local, ret);
 306
 307         if (!ret && mode == CHANCTX_SWMODE_SWAP_CONTEXTS) {
 308                 for (i = 0; i < n_vifs; i++) {
 309                         struct ieee80211_chanctx *new_ctx =
 310                                 container_of(vifs[i].new_ctx,
 311                                              struct ieee80211_chanctx,
 312                                              conf);
 313                         struct ieee80211_chanctx *old_ctx =
 314                                 container_of(vifs[i].old_ctx,
 315                                              struct ieee80211_chanctx,
 316                                              conf);
 317
 318                         new_ctx->driver_present = true;
 319                         old_ctx->driver_present = false;
 320                 }
 321         }
 322
 323         return ret;
 324 }
 325
 326 int drv_ampdu_action(struct ieee80211_local *local,
 327                      struct ieee80211_sub_if_data *sdata,
 328                      struct ieee80211_ampdu_params *params)
 329 {
 330         int ret = -EOPNOTSUPP;
 331
 332         might_sleep();
 333
 334         sdata = get_bss_sdata(sdata);
 335         if (!check_sdata_in_driver(sdata))
 336                 return -EIO;
 337
 338         trace_drv_ampdu_action(local, sdata, params);
 339
 340         if (local->ops->ampdu_action)
 341                 ret = local->ops->ampdu_action(&local->hw, &sdata->vif, params);
 342
 343         trace_drv_return_int(local, ret);
 344
 345         return ret;
 346 }