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

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   3  * This file is provided under a dual BSD/GPLv2 license.  When using or
   4  * redistributing this file, you may do so under either license.
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   6  * GPL LICENSE SUMMARY
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   8  * Copyright(c) 2012 - 2013 Intel Corporation. All rights reserved.
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  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of version 2 of the GNU General Public License as
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  17  * General Public License for more details.
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  21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110,
  22  * USA
  23  *
  24  * The full GNU General Public License is included in this distribution
  25  * in the file called COPYING.
  26  *
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  28  *  Intel Linux Wireless <ilw@linux.intel.com>
  29  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
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  50  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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  60  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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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 int iwl_mvm_update_quotas(struct iwl_mvm *mvm, struct ieee80211_vif *newvif)
 133 {
 134         struct iwl_time_quota_cmd cmd;
 135         int i, idx, ret, num_active_bindings, quota, quota_rem;
 136         struct iwl_mvm_quota_iterator_data data = {
 137                 .n_interfaces = {},
 138                 .colors = { -1, -1, -1, -1 },
 139                 .new_vif = newvif,
 140         };
 141
 142         /* update all upon completion */
 143         if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
 144                 return 0;
 145
 146         BUILD_BUG_ON(data.colors[MAX_BINDINGS - 1] != -1);
 147
 148         lockdep_assert_held(&mvm->mutex);
 149
 150         memset(&cmd, 0, sizeof(cmd));
 151
 152         ieee80211_iterate_active_interfaces_atomic(
 153                 mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
 154                 iwl_mvm_quota_iterator, &data);
 155         if (newvif) {
 156                 data.new_vif = NULL;
 157                 iwl_mvm_quota_iterator(&data, newvif->addr, newvif);
 158         }
 159
 160         /*
 161          * The FW's scheduling session consists of
 162          * IWL_MVM_MAX_QUOTA fragments. Divide these fragments
 163          * equally between all the bindings that require quota
 164          */
 165         num_active_bindings = 0;
 166         for (i = 0; i < MAX_BINDINGS; i++) {
 167                 cmd.quotas[i].id_and_color = cpu_to_le32(FW_CTXT_INVALID);
 168                 if (data.n_interfaces[i] > 0)
 169                         num_active_bindings++;
 170         }
 171
 172         quota = 0;
 173         quota_rem = 0;
 174         if (num_active_bindings) {
 175                 quota = IWL_MVM_MAX_QUOTA / num_active_bindings;
 176                 quota_rem = IWL_MVM_MAX_QUOTA % num_active_bindings;
 177         }
 178
 179         for (idx = 0, i = 0; i < MAX_BINDINGS; i++) {
 180                 if (data.colors[i] < 0)
 181                         continue;
 182
 183                 cmd.quotas[idx].id_and_color =
 184                         cpu_to_le32(FW_CMD_ID_AND_COLOR(i, data.colors[i]));
 185
 186                 if (data.n_interfaces[i] <= 0) {
 187                         cmd.quotas[idx].quota = cpu_to_le32(0);
 188                         cmd.quotas[idx].max_duration = cpu_to_le32(0);
 189                 } else {
 190                         cmd.quotas[idx].quota = cpu_to_le32(quota);
 191                         cmd.quotas[idx].max_duration =
 192                                 cpu_to_le32(IWL_MVM_MAX_QUOTA);
 193                 }
 194                 idx++;
 195         }
 196
 197         /* Give the remainder of the session to the first binding */
 198         le32_add_cpu(&cmd.quotas[0].quota, quota_rem);
 199
 200         ret = iwl_mvm_send_cmd_pdu(mvm, TIME_QUOTA_CMD, CMD_SYNC,
 201                                    sizeof(cmd), &cmd);
 202         if (ret)
 203                 IWL_ERR(mvm, "Failed to send quota: %d\n", ret);
 204         return ret;
 205 }