kernel/net/mac80211/driver-ops.c

   1 /*
   2  * Copyright 2015 Intel Deutschland GmbH
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License version 2 as
   6  * published by the Free Software Foundation.
   7  */
   8 #include <net/mac80211.h>
   9 #include "ieee80211_i.h"
  10 #include "trace.h"
  11 #include "driver-ops.h"
  12
  13 int drv_start(struct ieee80211_local *local)
  14 {
  15         int ret;
  16
  17         might_sleep();
  18
  19         if (WARN_ON(local->started))
  20                 return -EALREADY;
  21
  22         trace_drv_start(local);
  23         local->started = true;
  24         /* allow rx frames */
  25         smp_mb();
  26         ret = local->ops->start(&local->hw);
  27         trace_drv_return_int(local, ret);
  28
  29         if (ret)
  30                 local->started = false;
  31
  32         return ret;
  33 }
  34
  35 void drv_stop(struct ieee80211_local *local)
  36 {
  37         might_sleep();
  38
  39         if (WARN_ON(!local->started))
  40                 return;
  41
  42         trace_drv_stop(local);
  43         local->ops->stop(&local->hw);
  44         trace_drv_return_void(local);
  45
  46         /* sync away all work on the tasklet before clearing started */
  47         tasklet_disable(&local->tasklet);
  48         tasklet_enable(&local->tasklet);
  49
  50         barrier();
  51
  52         local->started = false;
  53 }
  54
  55 int drv_add_interface(struct ieee80211_local *local,
  56                       struct ieee80211_sub_if_data *sdata)
  57 {
  58         int ret;
  59
  60         might_sleep();
  61
  62         if (WARN_ON(sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
  63                     (sdata->vif.type == NL80211_IFTYPE_MONITOR &&
  64                      !ieee80211_hw_check(&local->hw, WANT_MONITOR_VIF) &&
  65                      !(sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE))))
  66                 return -EINVAL;
  67
  68         trace_drv_add_interface(local, sdata);
  69         ret = local->ops->add_interface(&local->hw, &sdata->vif);
  70         trace_drv_return_int(local, ret);
  71
  72         if (ret == 0)
  73                 sdata->flags |= IEEE80211_SDATA_IN_DRIVER;
  74
  75         return ret;
  76 }
  77
  78 int drv_change_interface(struct ieee80211_local *local,
  79                          struct ieee80211_sub_if_data *sdata,
  80                          enum nl80211_iftype type, bool p2p)
  81 {
  82         int ret;
  83
  84         might_sleep();
  85
  86         if (!check_sdata_in_driver(sdata))
  87                 return -EIO;
  88
  89         trace_drv_change_interface(local, sdata, type, p2p);
  90         ret = local->ops->change_interface(&local->hw, &sdata->vif, type, p2p);
  91         trace_drv_return_int(local, ret);
  92         return ret;
  93 }
  94
  95 void drv_remove_interface(struct ieee80211_local *local,
  96                           struct ieee80211_sub_if_data *sdata)
  97 {
  98         might_sleep();
  99
 100         if (!check_sdata_in_driver(sdata))
 101                 return;
 102
 103         trace_drv_remove_interface(local, sdata);
 104         local->ops->remove_interface(&local->hw, &sdata->vif);
 105         sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER;
 106         trace_drv_return_void(local);
 107 }
 108
 109 __must_check
 110 int drv_sta_state(struct ieee80211_local *local,
 111                   struct ieee80211_sub_if_data *sdata,
 112                   struct sta_info *sta,
 113                   enum ieee80211_sta_state old_state,
 114                   enum ieee80211_sta_state new_state)
 115 {
 116         int ret = 0;
 117
 118         might_sleep();
 119
 120         sdata = get_bss_sdata(sdata);
 121         if (!check_sdata_in_driver(sdata))
 122                 return -EIO;
 123
 124         trace_drv_sta_state(local, sdata, &sta->sta, old_state, new_state);
 125         if (local->ops->sta_state) {
 126                 ret = local->ops->sta_state(&local->hw, &sdata->vif, &sta->sta,
 127                                             old_state, new_state);
 128         } else if (old_state == IEEE80211_STA_AUTH &&
 129                    new_state == IEEE80211_STA_ASSOC) {
 130                 ret = drv_sta_add(local, sdata, &sta->sta);
 131                 if (ret == 0)
 132                         sta->uploaded = true;
 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 void drv_sta_rc_update(struct ieee80211_local *local,
 142                        struct ieee80211_sub_if_data *sdata,
 143                        struct ieee80211_sta *sta, u32 changed)
 144 {
 145         sdata = get_bss_sdata(sdata);
 146         if (!check_sdata_in_driver(sdata))
 147                 return;
 148
 149         WARN_ON(changed & IEEE80211_RC_SUPP_RATES_CHANGED &&
 150                 (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
 151                  sdata->vif.type != NL80211_IFTYPE_MESH_POINT));
 152
 153         trace_drv_sta_rc_update(local, sdata, sta, changed);
 154         if (local->ops->sta_rc_update)
 155                 local->ops->sta_rc_update(&local->hw, &sdata->vif,
 156                                           sta, changed);
 157
 158         trace_drv_return_void(local);
 159 }
 160
 161 int drv_conf_tx(struct ieee80211_local *local,
 162                 struct ieee80211_sub_if_data *sdata, u16 ac,
 163                 const struct ieee80211_tx_queue_params *params)
 164 {
 165         int ret = -EOPNOTSUPP;
 166
 167         might_sleep();
 168
 169         if (!check_sdata_in_driver(sdata))
 170                 return -EIO;
 171
 172         if (WARN_ONCE(params->cw_min == 0 ||
 173                       params->cw_min > params->cw_max,
 174                       "%s: invalid CW_min/CW_max: %d/%d\n",
 175                       sdata->name, params->cw_min, params->cw_max))
 176                 return -EINVAL;
 177
 178         trace_drv_conf_tx(local, sdata, ac, params);
 179         if (local->ops->conf_tx)
 180                 ret = local->ops->conf_tx(&local->hw, &sdata->vif,
 181                                           ac, params);
 182         trace_drv_return_int(local, ret);
 183         return ret;
 184 }
 185
 186 u64 drv_get_tsf(struct ieee80211_local *local,
 187                 struct ieee80211_sub_if_data *sdata)
 188 {
 189         u64 ret = -1ULL;
 190
 191         might_sleep();
 192
 193         if (!check_sdata_in_driver(sdata))
 194                 return ret;
 195
 196         trace_drv_get_tsf(local, sdata);
 197         if (local->ops->get_tsf)
 198                 ret = local->ops->get_tsf(&local->hw, &sdata->vif);
 199         trace_drv_return_u64(local, ret);
 200         return ret;
 201 }
 202
 203 void drv_set_tsf(struct ieee80211_local *local,
 204                  struct ieee80211_sub_if_data *sdata,
 205                  u64 tsf)
 206 {
 207         might_sleep();
 208
 209         if (!check_sdata_in_driver(sdata))
 210                 return;
 211
 212         trace_drv_set_tsf(local, sdata, tsf);
 213         if (local->ops->set_tsf)
 214                 local->ops->set_tsf(&local->hw, &sdata->vif, tsf);
 215         trace_drv_return_void(local);
 216 }
 217
 218 void drv_reset_tsf(struct ieee80211_local *local,
 219                    struct ieee80211_sub_if_data *sdata)
 220 {
 221         might_sleep();
 222
 223         if (!check_sdata_in_driver(sdata))
 224                 return;
 225
 226         trace_drv_reset_tsf(local, sdata);
 227         if (local->ops->reset_tsf)
 228                 local->ops->reset_tsf(&local->hw, &sdata->vif);
 229         trace_drv_return_void(local);
 230 }
 231
 232 int drv_switch_vif_chanctx(struct ieee80211_local *local,
 233                            struct ieee80211_vif_chanctx_switch *vifs,
 234                            int n_vifs, enum ieee80211_chanctx_switch_mode mode)
 235 {
 236         int ret = 0;
 237         int i;
 238
 239         might_sleep();
 240
 241         if (!local->ops->switch_vif_chanctx)
 242                 return -EOPNOTSUPP;
 243
 244         for (i = 0; i < n_vifs; i++) {
 245                 struct ieee80211_chanctx *new_ctx =
 246                         container_of(vifs[i].new_ctx,
 247                                      struct ieee80211_chanctx,
 248                                      conf);
 249                 struct ieee80211_chanctx *old_ctx =
 250                         container_of(vifs[i].old_ctx,
 251                                      struct ieee80211_chanctx,
 252                                      conf);
 253
 254                 WARN_ON_ONCE(!old_ctx->driver_present);
 255                 WARN_ON_ONCE((mode == CHANCTX_SWMODE_SWAP_CONTEXTS &&
 256                               new_ctx->driver_present) ||
 257                              (mode == CHANCTX_SWMODE_REASSIGN_VIF &&
 258                               !new_ctx->driver_present));
 259         }
 260
 261         trace_drv_switch_vif_chanctx(local, vifs, n_vifs, mode);
 262         ret = local->ops->switch_vif_chanctx(&local->hw,
 263                                              vifs, n_vifs, mode);
 264         trace_drv_return_int(local, ret);
 265
 266         if (!ret && mode == CHANCTX_SWMODE_SWAP_CONTEXTS) {
 267                 for (i = 0; i < n_vifs; i++) {
 268                         struct ieee80211_chanctx *new_ctx =
 269                                 container_of(vifs[i].new_ctx,
 270                                              struct ieee80211_chanctx,
 271                                              conf);
 272                         struct ieee80211_chanctx *old_ctx =
 273                                 container_of(vifs[i].old_ctx,
 274                                              struct ieee80211_chanctx,
 275                                              conf);
 276
 277                         new_ctx->driver_present = true;
 278                         old_ctx->driver_present = false;
 279                 }
 280         }
 281
 282         return ret;
 283 }
 284
 285 int drv_ampdu_action(struct ieee80211_local *local,
 286                      struct ieee80211_sub_if_data *sdata,
 287                      enum ieee80211_ampdu_mlme_action action,
 288                      struct ieee80211_sta *sta, u16 tid,
 289                      u16 *ssn, u8 buf_size, bool amsdu)
 290 {
 291         int ret = -EOPNOTSUPP;
 292
 293         might_sleep();
 294
 295         sdata = get_bss_sdata(sdata);
 296         if (!check_sdata_in_driver(sdata))
 297                 return -EIO;
 298
 299         trace_drv_ampdu_action(local, sdata, action, sta, tid,
 300                                ssn, buf_size, amsdu);
 301
 302         if (local->ops->ampdu_action)
 303                 ret = local->ops->ampdu_action(&local->hw, &sdata->vif, action,
 304                                                sta, tid, ssn, buf_size, amsdu);
 305
 306         trace_drv_return_int(local, ret);
 307
 308         return ret;
 309 }