drivers/net/wireless/iwlwifi/mvm/quota.c

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  62  *****************************************************************************/
  63
  64 #include <net/mac80211.h>
  65 #include "fw-api.h"
  66 #include "mvm.h"
  67
  68 #define QUOTA_100       IWL_MVM_MAX_QUOTA
  69 #define QUOTA_LOWLAT_MIN ((QUOTA_100 * IWL_MVM_LOWLAT_QUOTA_MIN_PERCENT) / 100)
  70
  71 struct iwl_mvm_quota_iterator_data {
  72         int n_interfaces[MAX_BINDINGS];
  73         int colors[MAX_BINDINGS];
  74         int low_latency[MAX_BINDINGS];
  75         int n_low_latency_bindings;
  76         struct ieee80211_vif *disabled_vif;
  77 };
  78
  79 static void iwl_mvm_quota_iterator(void *_data, u8 *mac,
  80                                    struct ieee80211_vif *vif)
  81 {
  82         struct iwl_mvm_quota_iterator_data *data = _data;
  83         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
  84         u16 id;
  85
  86         /* skip disabled interfaces here immediately */
  87         if (vif == data->disabled_vif)
  88                 return;
  89
  90         if (!mvmvif->phy_ctxt)
  91                 return;
  92
  93         /* currently, PHY ID == binding ID */
  94         id = mvmvif->phy_ctxt->id;
  95
  96         /* need at least one binding per PHY */
  97         BUILD_BUG_ON(NUM_PHY_CTX > MAX_BINDINGS);
  98
  99         if (WARN_ON_ONCE(id >= MAX_BINDINGS))
 100                 return;
 101
 102         switch (vif->type) {
 103         case NL80211_IFTYPE_STATION:
 104                 if (vif->bss_conf.assoc)
 105                         break;
 106                 return;
 107         case NL80211_IFTYPE_AP:
 108         case NL80211_IFTYPE_ADHOC:
 109                 if (mvmvif->ap_ibss_active)
 110                         break;
 111                 return;
 112         case NL80211_IFTYPE_MONITOR:
 113                 if (mvmvif->monitor_active)
 114                         break;
 115                 return;
 116         case NL80211_IFTYPE_P2P_DEVICE:
 117                 return;
 118         default:
 119                 WARN_ON_ONCE(1);
 120                 return;
 121         }
 122
 123         if (data->colors[id] < 0)
 124                 data->colors[id] = mvmvif->phy_ctxt->color;
 125         else
 126                 WARN_ON_ONCE(data->colors[id] != mvmvif->phy_ctxt->color);
 127
 128         data->n_interfaces[id]++;
 129
 130         if (iwl_mvm_vif_low_latency(mvmvif) && !data->low_latency[id]) {
 131                 data->n_low_latency_bindings++;
 132                 data->low_latency[id] = true;
 133         }
 134 }
 135
 136 static void iwl_mvm_adjust_quota_for_noa(struct iwl_mvm *mvm,
 137                                          struct iwl_time_quota_cmd *cmd)
 138 {
 139 #ifdef CONFIG_NL80211_TESTMODE
 140         struct iwl_mvm_vif *mvmvif;
 141         int i, phy_id = -1, beacon_int = 0;
 142
 143         if (!mvm->noa_duration || !mvm->noa_vif)
 144                 return;
 145
 146         mvmvif = iwl_mvm_vif_from_mac80211(mvm->noa_vif);
 147         if (!mvmvif->ap_ibss_active)
 148                 return;
 149
 150         phy_id = mvmvif->phy_ctxt->id;
 151         beacon_int = mvm->noa_vif->bss_conf.beacon_int;
 152
 153         for (i = 0; i < MAX_BINDINGS; i++) {
 154                 u32 id_n_c = le32_to_cpu(cmd->quotas[i].id_and_color);
 155                 u32 id = (id_n_c & FW_CTXT_ID_MSK) >> FW_CTXT_ID_POS;
 156                 u32 quota = le32_to_cpu(cmd->quotas[i].quota);
 157
 158                 if (id != phy_id)
 159                         continue;
 160
 161                 quota *= (beacon_int - mvm->noa_duration);
 162                 quota /= beacon_int;
 163
 164                 cmd->quotas[i].quota = cpu_to_le32(quota);
 165         }
 166 #endif
 167 }
 168
 169 int iwl_mvm_update_quotas(struct iwl_mvm *mvm,
 170                           struct ieee80211_vif *disabled_vif)
 171 {
 172         struct iwl_time_quota_cmd cmd = {};
 173         int i, idx, ret, num_active_macs, quota, quota_rem, n_non_lowlat;
 174         struct iwl_mvm_quota_iterator_data data = {
 175                 .n_interfaces = {},
 176                 .colors = { -1, -1, -1, -1 },
 177                 .disabled_vif = disabled_vif,
 178         };
 179
 180         lockdep_assert_held(&mvm->mutex);
 181
 182         /* update all upon completion */
 183         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
 184                 return 0;
 185
 186         /* iterator data above must match */
 187         BUILD_BUG_ON(MAX_BINDINGS != 4);
 188
 189         ieee80211_iterate_active_interfaces_atomic(
 190                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
 191                 iwl_mvm_quota_iterator, &data);
 192
 193         /*
 194          * The FW's scheduling session consists of
 195          * IWL_MVM_MAX_QUOTA fragments. Divide these fragments
 196          * equally between all the bindings that require quota
 197          */
 198         num_active_macs = 0;
 199         for (i = 0; i < MAX_BINDINGS; i++) {
 200                 cmd.quotas[i].id_and_color = cpu_to_le32(FW_CTXT_INVALID);
 201                 num_active_macs += data.n_interfaces[i];
 202         }
 203
 204         n_non_lowlat = num_active_macs;
 205
 206         if (data.n_low_latency_bindings == 1) {
 207                 for (i = 0; i < MAX_BINDINGS; i++) {
 208                         if (data.low_latency[i]) {
 209                                 n_non_lowlat -= data.n_interfaces[i];
 210                                 break;
 211                         }
 212                 }
 213         }
 214
 215         if (data.n_low_latency_bindings == 1 && n_non_lowlat) {
 216                 /*
 217                  * Reserve quota for the low latency binding in case that
 218                  * there are several data bindings but only a single
 219                  * low latency one. Split the rest of the quota equally
 220                  * between the other data interfaces.
 221                  */
 222                 quota = (QUOTA_100 - QUOTA_LOWLAT_MIN) / n_non_lowlat;
 223                 quota_rem = QUOTA_100 - n_non_lowlat * quota -
 224                             QUOTA_LOWLAT_MIN;
 225         } else if (num_active_macs) {
 226                 /*
 227                  * There are 0 or more than 1 low latency bindings, or all the
 228                  * data interfaces belong to the single low latency binding.
 229                  * Split the quota equally between the data interfaces.
 230                  */
 231                 quota = QUOTA_100 / num_active_macs;
 232                 quota_rem = QUOTA_100 % num_active_macs;
 233         } else {
 234                 /* values don't really matter - won't be used */
 235                 quota = 0;
 236                 quota_rem = 0;
 237         }
 238
 239         for (idx = 0, i = 0; i < MAX_BINDINGS; i++) {
 240                 if (data.colors[i] < 0)
 241                         continue;
 242
 243                 cmd.quotas[idx].id_and_color =
 244                         cpu_to_le32(FW_CMD_ID_AND_COLOR(i, data.colors[i]));
 245
 246                 if (data.n_interfaces[i] <= 0)
 247                         cmd.quotas[idx].quota = cpu_to_le32(0);
 248                 else if (data.n_low_latency_bindings == 1 && n_non_lowlat &&
 249                          data.low_latency[i])
 250                         /*
 251                          * There is more than one binding, but only one of the
 252                          * bindings is in low latency. For this case, allocate
 253                          * the minimal required quota for the low latency
 254                          * binding.
 255                          */
 256                         cmd.quotas[idx].quota = cpu_to_le32(QUOTA_LOWLAT_MIN);
 257                 else
 258                         cmd.quotas[idx].quota =
 259                                 cpu_to_le32(quota * data.n_interfaces[i]);
 260
 261                 WARN_ONCE(le32_to_cpu(cmd.quotas[idx].quota) > QUOTA_100,
 262                           "Binding=%d, quota=%u > max=%u\n",
 263                           idx, le32_to_cpu(cmd.quotas[idx].quota), QUOTA_100);
 264
 265                 cmd.quotas[idx].max_duration = cpu_to_le32(0);
 266
 267                 idx++;
 268         }
 269
 270         /* Give the remainder of the session to the first data binding */
 271         for (i = 0; i < MAX_BINDINGS; i++) {
 272                 if (le32_to_cpu(cmd.quotas[i].quota) != 0) {
 273                         le32_add_cpu(&cmd.quotas[i].quota, quota_rem);
 274                         break;
 275                 }
 276         }
 277
 278         iwl_mvm_adjust_quota_for_noa(mvm, &cmd);
 279
 280         /* check that we have non-zero quota for all valid bindings */
 281         for (i = 0; i < MAX_BINDINGS; i++) {
 282                 if (cmd.quotas[i].id_and_color == cpu_to_le32(FW_CTXT_INVALID))
 283                         continue;
 284                 WARN_ONCE(cmd.quotas[i].quota == 0,
 285                           "zero quota on binding %d\n", i);
 286         }
 287
 288         ret = iwl_mvm_send_cmd_pdu(mvm, TIME_QUOTA_CMD, 0,
 289                                    sizeof(cmd), &cmd);
 290         if (ret)
 291                 IWL_ERR(mvm, "Failed to send quota: %d\n", ret);
 292         return ret;
 293 }