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298 lines
7.8 KiB
298 lines
7.8 KiB
// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause |
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/* |
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* Copyright (C) 2012-2014, 2018 Intel Corporation |
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* Copyright (C) 2013-2014 Intel Mobile Communications GmbH |
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* Copyright (C) 2016-2017 Intel Deutschland GmbH |
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*/ |
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#include <net/mac80211.h> |
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#include "fw-api.h" |
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#include "mvm.h" |
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#define QUOTA_100 IWL_MVM_MAX_QUOTA |
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#define QUOTA_LOWLAT_MIN ((QUOTA_100 * IWL_MVM_LOWLAT_QUOTA_MIN_PERCENT) / 100) |
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struct iwl_mvm_quota_iterator_data { |
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int n_interfaces[MAX_BINDINGS]; |
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int colors[MAX_BINDINGS]; |
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int low_latency[MAX_BINDINGS]; |
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#ifdef CONFIG_IWLWIFI_DEBUGFS |
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int dbgfs_min[MAX_BINDINGS]; |
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#endif |
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int n_low_latency_bindings; |
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struct ieee80211_vif *disabled_vif; |
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}; |
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static void iwl_mvm_quota_iterator(void *_data, u8 *mac, |
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struct ieee80211_vif *vif) |
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{ |
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struct iwl_mvm_quota_iterator_data *data = _data; |
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struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif); |
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u16 id; |
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/* skip disabled interfaces here immediately */ |
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if (vif == data->disabled_vif) |
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return; |
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if (!mvmvif->phy_ctxt) |
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return; |
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/* currently, PHY ID == binding ID */ |
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id = mvmvif->phy_ctxt->id; |
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/* need at least one binding per PHY */ |
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BUILD_BUG_ON(NUM_PHY_CTX > MAX_BINDINGS); |
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if (WARN_ON_ONCE(id >= MAX_BINDINGS)) |
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return; |
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switch (vif->type) { |
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case NL80211_IFTYPE_STATION: |
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if (vif->bss_conf.assoc) |
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break; |
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return; |
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case NL80211_IFTYPE_AP: |
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case NL80211_IFTYPE_ADHOC: |
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if (mvmvif->ap_ibss_active) |
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break; |
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return; |
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case NL80211_IFTYPE_MONITOR: |
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if (mvmvif->monitor_active) |
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break; |
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return; |
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case NL80211_IFTYPE_P2P_DEVICE: |
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return; |
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default: |
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WARN_ON_ONCE(1); |
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return; |
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} |
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if (data->colors[id] < 0) |
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data->colors[id] = mvmvif->phy_ctxt->color; |
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else |
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WARN_ON_ONCE(data->colors[id] != mvmvif->phy_ctxt->color); |
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data->n_interfaces[id]++; |
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#ifdef CONFIG_IWLWIFI_DEBUGFS |
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if (mvmvif->dbgfs_quota_min) |
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data->dbgfs_min[id] = max(data->dbgfs_min[id], |
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mvmvif->dbgfs_quota_min); |
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#endif |
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if (iwl_mvm_vif_low_latency(mvmvif) && !data->low_latency[id]) { |
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data->n_low_latency_bindings++; |
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data->low_latency[id] = true; |
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} |
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} |
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static void iwl_mvm_adjust_quota_for_noa(struct iwl_mvm *mvm, |
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struct iwl_time_quota_cmd *cmd) |
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{ |
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#ifdef CONFIG_NL80211_TESTMODE |
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struct iwl_mvm_vif *mvmvif; |
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int i, phy_id = -1, beacon_int = 0; |
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if (!mvm->noa_duration || !mvm->noa_vif) |
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return; |
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mvmvif = iwl_mvm_vif_from_mac80211(mvm->noa_vif); |
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if (!mvmvif->ap_ibss_active) |
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return; |
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phy_id = mvmvif->phy_ctxt->id; |
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beacon_int = mvm->noa_vif->bss_conf.beacon_int; |
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for (i = 0; i < MAX_BINDINGS; i++) { |
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struct iwl_time_quota_data *data = |
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iwl_mvm_quota_cmd_get_quota(mvm, cmd, |
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i); |
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u32 id_n_c = le32_to_cpu(data->id_and_color); |
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u32 id = (id_n_c & FW_CTXT_ID_MSK) >> FW_CTXT_ID_POS; |
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u32 quota = le32_to_cpu(data->quota); |
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if (id != phy_id) |
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continue; |
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quota *= (beacon_int - mvm->noa_duration); |
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quota /= beacon_int; |
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IWL_DEBUG_QUOTA(mvm, "quota: adjust for NoA from %d to %d\n", |
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le32_to_cpu(data->quota), quota); |
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data->quota = cpu_to_le32(quota); |
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} |
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#endif |
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} |
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int iwl_mvm_update_quotas(struct iwl_mvm *mvm, |
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bool force_update, |
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struct ieee80211_vif *disabled_vif) |
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{ |
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struct iwl_time_quota_cmd cmd = {}; |
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int i, idx, err, num_active_macs, quota, quota_rem, n_non_lowlat; |
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struct iwl_mvm_quota_iterator_data data = { |
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.n_interfaces = {}, |
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.colors = { -1, -1, -1, -1 }, |
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.disabled_vif = disabled_vif, |
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}; |
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struct iwl_time_quota_cmd *last = &mvm->last_quota_cmd; |
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struct iwl_time_quota_data *qdata, *last_data; |
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bool send = false; |
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lockdep_assert_held(&mvm->mutex); |
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if (fw_has_capa(&mvm->fw->ucode_capa, |
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IWL_UCODE_TLV_CAPA_DYNAMIC_QUOTA)) |
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return 0; |
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/* update all upon completion */ |
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if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status)) |
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return 0; |
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/* iterator data above must match */ |
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BUILD_BUG_ON(MAX_BINDINGS != 4); |
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ieee80211_iterate_active_interfaces_atomic( |
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mvm->hw, IEEE80211_IFACE_ITER_NORMAL, |
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iwl_mvm_quota_iterator, &data); |
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/* |
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* The FW's scheduling session consists of |
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* IWL_MVM_MAX_QUOTA fragments. Divide these fragments |
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* equally between all the bindings that require quota |
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*/ |
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num_active_macs = 0; |
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for (i = 0; i < MAX_BINDINGS; i++) { |
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qdata = iwl_mvm_quota_cmd_get_quota(mvm, &cmd, i); |
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qdata->id_and_color = cpu_to_le32(FW_CTXT_INVALID); |
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num_active_macs += data.n_interfaces[i]; |
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} |
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n_non_lowlat = num_active_macs; |
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if (data.n_low_latency_bindings == 1) { |
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for (i = 0; i < MAX_BINDINGS; i++) { |
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if (data.low_latency[i]) { |
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n_non_lowlat -= data.n_interfaces[i]; |
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break; |
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} |
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} |
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} |
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if (data.n_low_latency_bindings == 1 && n_non_lowlat) { |
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/* |
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* Reserve quota for the low latency binding in case that |
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* there are several data bindings but only a single |
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* low latency one. Split the rest of the quota equally |
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* between the other data interfaces. |
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*/ |
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quota = (QUOTA_100 - QUOTA_LOWLAT_MIN) / n_non_lowlat; |
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quota_rem = QUOTA_100 - n_non_lowlat * quota - |
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QUOTA_LOWLAT_MIN; |
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IWL_DEBUG_QUOTA(mvm, |
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"quota: low-latency binding active, remaining quota per other binding: %d\n", |
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quota); |
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} else if (num_active_macs) { |
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/* |
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* There are 0 or more than 1 low latency bindings, or all the |
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* data interfaces belong to the single low latency binding. |
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* Split the quota equally between the data interfaces. |
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*/ |
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quota = QUOTA_100 / num_active_macs; |
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quota_rem = QUOTA_100 % num_active_macs; |
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IWL_DEBUG_QUOTA(mvm, |
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"quota: splitting evenly per binding: %d\n", |
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quota); |
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} else { |
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/* values don't really matter - won't be used */ |
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quota = 0; |
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quota_rem = 0; |
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} |
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for (idx = 0, i = 0; i < MAX_BINDINGS; i++) { |
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if (data.colors[i] < 0) |
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continue; |
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qdata = iwl_mvm_quota_cmd_get_quota(mvm, &cmd, idx); |
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qdata->id_and_color = |
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cpu_to_le32(FW_CMD_ID_AND_COLOR(i, data.colors[i])); |
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if (data.n_interfaces[i] <= 0) |
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qdata->quota = cpu_to_le32(0); |
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#ifdef CONFIG_IWLWIFI_DEBUGFS |
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else if (data.dbgfs_min[i]) |
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qdata->quota = |
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cpu_to_le32(data.dbgfs_min[i] * QUOTA_100 / 100); |
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#endif |
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else if (data.n_low_latency_bindings == 1 && n_non_lowlat && |
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data.low_latency[i]) |
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/* |
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* There is more than one binding, but only one of the |
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* bindings is in low latency. For this case, allocate |
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* the minimal required quota for the low latency |
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* binding. |
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*/ |
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qdata->quota = cpu_to_le32(QUOTA_LOWLAT_MIN); |
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else |
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qdata->quota = |
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cpu_to_le32(quota * data.n_interfaces[i]); |
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WARN_ONCE(le32_to_cpu(qdata->quota) > QUOTA_100, |
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"Binding=%d, quota=%u > max=%u\n", |
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idx, le32_to_cpu(qdata->quota), QUOTA_100); |
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qdata->max_duration = cpu_to_le32(0); |
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idx++; |
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} |
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/* Give the remainder of the session to the first data binding */ |
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for (i = 0; i < MAX_BINDINGS; i++) { |
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qdata = iwl_mvm_quota_cmd_get_quota(mvm, &cmd, i); |
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if (le32_to_cpu(qdata->quota) != 0) { |
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le32_add_cpu(&qdata->quota, quota_rem); |
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IWL_DEBUG_QUOTA(mvm, |
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"quota: giving remainder of %d to binding %d\n", |
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quota_rem, i); |
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break; |
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} |
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} |
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iwl_mvm_adjust_quota_for_noa(mvm, &cmd); |
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/* check that we have non-zero quota for all valid bindings */ |
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for (i = 0; i < MAX_BINDINGS; i++) { |
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qdata = iwl_mvm_quota_cmd_get_quota(mvm, &cmd, i); |
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last_data = iwl_mvm_quota_cmd_get_quota(mvm, last, i); |
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if (qdata->id_and_color != last_data->id_and_color) |
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send = true; |
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if (qdata->max_duration != last_data->max_duration) |
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send = true; |
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if (abs((int)le32_to_cpu(qdata->quota) - |
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(int)le32_to_cpu(last_data->quota)) |
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> IWL_MVM_QUOTA_THRESHOLD) |
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send = true; |
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if (qdata->id_and_color == cpu_to_le32(FW_CTXT_INVALID)) |
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continue; |
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WARN_ONCE(qdata->quota == 0, |
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"zero quota on binding %d\n", i); |
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} |
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if (!send && !force_update) { |
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/* don't send a practically unchanged command, the firmware has |
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* to re-initialize a lot of state and that can have an adverse |
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* impact on it |
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*/ |
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return 0; |
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} |
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err = iwl_mvm_send_cmd_pdu(mvm, TIME_QUOTA_CMD, 0, |
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iwl_mvm_quota_cmd_size(mvm), &cmd); |
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if (err) |
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IWL_ERR(mvm, "Failed to send quota: %d\n", err); |
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else |
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mvm->last_quota_cmd = cmd; |
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return err; |
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}
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