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

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   8  * Copyright(c) 2012 - 2013 Intel Corporation. All rights reserved.
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  28  *  Intel Linux Wireless <ilw@linux.intel.com>
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  62  *****************************************************************************/
  63
  64 #include <net/mac80211.h>
  65 #include "fw-api.h"
  66 #include "mvm.h"
  67
  68 struct iwl_mvm_quota_iterator_data {
  69         int n_interfaces[MAX_BINDINGS];
  70         int colors[MAX_BINDINGS];
  71         struct ieee80211_vif *new_vif;
  72 };
  73
  74 static void iwl_mvm_quota_iterator(void *_data, u8 *mac,
  75                                    struct ieee80211_vif *vif)
  76 {
  77         struct iwl_mvm_quota_iterator_data *data = _data;
  78         struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
  79         u16 id;
  80
  81         /*
  82          * We'll account for the new interface (if any) below,
  83          * skip it here in case we're not called from within
  84          * the add_interface callback (otherwise it won't show
  85          * up in iteration)
  86          */
  87         if (vif == data->new_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         if (data->colors[id] < 0)
 103                 data->colors[id] = mvmvif->phy_ctxt->color;
 104         else
 105                 WARN_ON_ONCE(data->colors[id] != mvmvif->phy_ctxt->color);
 106
 107         switch (vif->type) {
 108         case NL80211_IFTYPE_STATION:
 109                 if (vif->bss_conf.assoc)
 110                         data->n_interfaces[id]++;
 111                 break;
 112         case NL80211_IFTYPE_AP:
 113                 if (mvmvif->ap_active)
 114                         data->n_interfaces[id]++;
 115                 break;
 116         case NL80211_IFTYPE_MONITOR:
 117                 if (mvmvif->monitor_active)
 118                         data->n_interfaces[id]++;
 119                 break;
 120         case NL80211_IFTYPE_P2P_DEVICE:
 121                 break;
 122         case NL80211_IFTYPE_ADHOC:
 123                 if (vif->bss_conf.ibss_joined)
 124                         data->n_interfaces[id]++;
 125                 break;
 126         default:
 127                 WARN_ON_ONCE(1);
 128                 break;
 129         }
 130 }
 131
 132 static void iwl_mvm_adjust_quota_for_noa(struct iwl_mvm *mvm,
 133                                          struct iwl_time_quota_cmd *cmd)
 134 {
 135 #ifdef CONFIG_NL80211_TESTMODE
 136         struct iwl_mvm_vif *mvmvif;
 137         int i, phy_id = -1, beacon_int = 0;
 138
 139         if (!mvm->noa_duration || !mvm->noa_vif)
 140                 return;
 141
 142         mvmvif = iwl_mvm_vif_from_mac80211(mvm->noa_vif);
 143         if (!mvmvif->ap_active)
 144                 return;
 145
 146         phy_id = mvmvif->phy_ctxt->id;
 147         beacon_int = mvm->noa_vif->bss_conf.beacon_int;
 148
 149         for (i = 0; i < MAX_BINDINGS; i++) {
 150                 u32 id_n_c = le32_to_cpu(cmd->quotas[i].id_and_color);
 151                 u32 id = (id_n_c & FW_CTXT_ID_MSK) >> FW_CTXT_ID_POS;
 152                 u32 quota = le32_to_cpu(cmd->quotas[i].quota);
 153
 154                 if (id != phy_id)
 155                         continue;
 156
 157                 quota *= (beacon_int - mvm->noa_duration) / beacon_int;
 158
 159                 cmd->quotas[i].quota = cpu_to_le32(quota);
 160         }
 161 #endif
 162 }
 163
 164 int iwl_mvm_update_quotas(struct iwl_mvm *mvm, struct ieee80211_vif *newvif)
 165 {
 166         struct iwl_time_quota_cmd cmd = {};
 167         int i, idx, ret, num_active_macs, quota, quota_rem;
 168         struct iwl_mvm_quota_iterator_data data = {
 169                 .n_interfaces = {},
 170                 .colors = { -1, -1, -1, -1 },
 171                 .new_vif = newvif,
 172         };
 173
 174         lockdep_assert_held(&mvm->mutex);
 175
 176         /* update all upon completion */
 177         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
 178                 return 0;
 179
 180         /* iterator data above must match */
 181         BUILD_BUG_ON(MAX_BINDINGS != 4);
 182
 183         ieee80211_iterate_active_interfaces_atomic(
 184                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
 185                 iwl_mvm_quota_iterator, &data);
 186         if (newvif) {
 187                 data.new_vif = NULL;
 188                 iwl_mvm_quota_iterator(&data, newvif->addr, newvif);
 189         }
 190
 191         /*
 192          * The FW's scheduling session consists of
 193          * IWL_MVM_MAX_QUOTA fragments. Divide these fragments
 194          * equally between all the bindings that require quota
 195          */
 196         num_active_macs = 0;
 197         for (i = 0; i < MAX_BINDINGS; i++) {
 198                 cmd.quotas[i].id_and_color = cpu_to_le32(FW_CTXT_INVALID);
 199                 num_active_macs += data.n_interfaces[i];
 200         }
 201
 202         quota = 0;
 203         quota_rem = 0;
 204         if (num_active_macs) {
 205                 quota = IWL_MVM_MAX_QUOTA / num_active_macs;
 206                 quota_rem = IWL_MVM_MAX_QUOTA % num_active_macs;
 207         }
 208
 209         for (idx = 0, i = 0; i < MAX_BINDINGS; i++) {
 210                 if (data.colors[i] < 0)
 211                         continue;
 212
 213                 cmd.quotas[idx].id_and_color =
 214                         cpu_to_le32(FW_CMD_ID_AND_COLOR(i, data.colors[i]));
 215
 216                 if (data.n_interfaces[i] <= 0) {
 217                         cmd.quotas[idx].quota = cpu_to_le32(0);
 218                         cmd.quotas[idx].max_duration = cpu_to_le32(0);
 219                 } else {
 220                         cmd.quotas[idx].quota =
 221                                 cpu_to_le32(quota * data.n_interfaces[i]);
 222                         cmd.quotas[idx].max_duration =
 223                                 cpu_to_le32(IWL_MVM_MAX_QUOTA);
 224                 }
 225                 idx++;
 226         }
 227
 228         /* Give the remainder of the session to the first binding */
 229         le32_add_cpu(&cmd.quotas[0].quota, quota_rem);
 230
 231         iwl_mvm_adjust_quota_for_noa(mvm, &cmd);
 232
 233         ret = iwl_mvm_send_cmd_pdu(mvm, TIME_QUOTA_CMD, CMD_SYNC,
 234                                    sizeof(cmd), &cmd);
 235         if (ret)
 236                 IWL_ERR(mvm, "Failed to send quota: %d\n", ret);
 237         return ret;
 238 }