1 files changed, 299 insertions, 0 deletions
diff --git a/drivers/net/wireless/intel/iwlwifi/mvm/quota.c b/drivers/net/wireless/intel/iwlwifi/mvm/quota.c
new file mode 100644
index 000000000..aad2614af
--- /dev/null
+++ b/drivers/net/wireless/intel/iwlwifi/mvm/quota.c
@@ -0,0 +1,299 @@
+// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
+/*
+ * Copyright (C) 2012-2014, 2018, 2021-2022 Intel Corporation
+ * Copyright (C) 2013-2014 Intel Mobile Communications GmbH
+ * Copyright (C) 2016-2017 Intel Deutschland GmbH
+ */
+#include <net/mac80211.h>
+#include "fw-api.h"
+#include "mvm.h"
+
+#define QUOTA_100	IWL_MVM_MAX_QUOTA
+#define QUOTA_LOWLAT_MIN ((QUOTA_100 * IWL_MVM_LOWLAT_QUOTA_MIN_PERCENT) / 100)
+
+struct iwl_mvm_quota_iterator_data {
+	int n_interfaces[MAX_BINDINGS];
+	int colors[MAX_BINDINGS];
+	int low_latency[MAX_BINDINGS];
+#ifdef CONFIG_IWLWIFI_DEBUGFS
+	int dbgfs_min[MAX_BINDINGS];
+#endif
+	int n_low_latency_bindings;
+	struct ieee80211_vif *disabled_vif;
+};
+
+static void iwl_mvm_quota_iterator(void *_data, u8 *mac,
+				   struct ieee80211_vif *vif)
+{
+	struct iwl_mvm_quota_iterator_data *data = _data;
+	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);
+	u16 id;
+
+	/* skip disabled interfaces here immediately */
+	if (vif == data->disabled_vif)
+		return;
+
+	if (!mvmvif->deflink.phy_ctxt)
+		return;
+
+	/* currently, PHY ID == binding ID */
+	id = mvmvif->deflink.phy_ctxt->id;
+
+	/* need at least one binding per PHY */
+	BUILD_BUG_ON(NUM_PHY_CTX > MAX_BINDINGS);
+
+	if (WARN_ON_ONCE(id >= MAX_BINDINGS))
+		return;
+
+	switch (vif->type) {
+	case NL80211_IFTYPE_STATION:
+		if (vif->cfg.assoc)
+			break;
+		return;
+	case NL80211_IFTYPE_AP:
+	case NL80211_IFTYPE_ADHOC:
+		if (mvmvif->ap_ibss_active)
+			break;
+		return;
+	case NL80211_IFTYPE_MONITOR:
+		if (mvmvif->monitor_active)
+			break;
+		return;
+	case NL80211_IFTYPE_P2P_DEVICE:
+		return;
+	default:
+		WARN_ON_ONCE(1);
+		return;
+	}
+
+	if (data->colors[id] < 0)
+		data->colors[id] = mvmvif->deflink.phy_ctxt->color;
+	else
+		WARN_ON_ONCE(data->colors[id] !=
+			     mvmvif->deflink.phy_ctxt->color);
+
+	data->n_interfaces[id]++;
+
+#ifdef CONFIG_IWLWIFI_DEBUGFS
+	if (mvmvif->dbgfs_quota_min)
+		data->dbgfs_min[id] = max(data->dbgfs_min[id],
+					  mvmvif->dbgfs_quota_min);
+#endif
+
+	if (iwl_mvm_vif_low_latency(mvmvif) && !data->low_latency[id]) {
+		data->n_low_latency_bindings++;
+		data->low_latency[id] = true;
+	}
+}
+
+static void iwl_mvm_adjust_quota_for_noa(struct iwl_mvm *mvm,
+					 struct iwl_time_quota_cmd *cmd)
+{
+#ifdef CONFIG_NL80211_TESTMODE
+	struct iwl_mvm_vif *mvmvif;
+	int i, phy_id = -1, beacon_int = 0;
+
+	if (!mvm->noa_duration || !mvm->noa_vif)
+		return;
+
+	mvmvif = iwl_mvm_vif_from_mac80211(mvm->noa_vif);
+	if (!mvmvif->ap_ibss_active)
+		return;
+
+	phy_id = mvmvif->deflink.phy_ctxt->id;
+	beacon_int = mvm->noa_vif->bss_conf.beacon_int;
+
+	for (i = 0; i < MAX_BINDINGS; i++) {
+		struct iwl_time_quota_data *data =
+					iwl_mvm_quota_cmd_get_quota(mvm, cmd,
+								    i);
+		u32 id_n_c = le32_to_cpu(data->id_and_color);
+		u32 id = (id_n_c & FW_CTXT_ID_MSK) >> FW_CTXT_ID_POS;
+		u32 quota = le32_to_cpu(data->quota);
+
+		if (id != phy_id)
+			continue;
+
+		quota *= (beacon_int - mvm->noa_duration);
+		quota /= beacon_int;
+
+		IWL_DEBUG_QUOTA(mvm, "quota: adjust for NoA from %d to %d\n",
+				le32_to_cpu(data->quota), quota);
+
+		data->quota = cpu_to_le32(quota);
+	}
+#endif
+}
+
+int iwl_mvm_update_quotas(struct iwl_mvm *mvm,
+			  bool force_update,
+			  struct ieee80211_vif *disabled_vif)
+{
+	struct iwl_time_quota_cmd cmd = {};
+	int i, idx, err, num_active_macs, quota, quota_rem, n_non_lowlat;
+	struct iwl_mvm_quota_iterator_data data = {
+		.n_interfaces = {},
+		.colors = { -1, -1, -1, -1 },
+		.disabled_vif = disabled_vif,
+	};
+	struct iwl_time_quota_cmd *last = &mvm->last_quota_cmd;
+	struct iwl_time_quota_data *qdata, *last_data;
+	bool send = false;
+
+	lockdep_assert_held(&mvm->mutex);
+
+	if (fw_has_capa(&mvm->fw->ucode_capa,
+			IWL_UCODE_TLV_CAPA_DYNAMIC_QUOTA))
+		return 0;
+
+	/* update all upon completion */
+	if (test_bit(IWL_MVM_STATUS_IN_HW_RESTART, &mvm->status))
+		return 0;
+
+	/* iterator data above must match */
+	BUILD_BUG_ON(MAX_BINDINGS != 4);
+
+	ieee80211_iterate_active_interfaces_atomic(
+		mvm->hw, IEEE80211_IFACE_ITER_NORMAL,
+		iwl_mvm_quota_iterator, &data);
+
+	/*
+	 * The FW's scheduling session consists of
+	 * IWL_MVM_MAX_QUOTA fragments. Divide these fragments
+	 * equally between all the bindings that require quota
+	 */
+	num_active_macs = 0;
+	for (i = 0; i < MAX_BINDINGS; i++) {
+		qdata = iwl_mvm_quota_cmd_get_quota(mvm, &cmd, i);
+		qdata->id_and_color = cpu_to_le32(FW_CTXT_INVALID);
+		num_active_macs += data.n_interfaces[i];
+	}
+
+	n_non_lowlat = num_active_macs;
+
+	if (data.n_low_latency_bindings == 1) {
+		for (i = 0; i < MAX_BINDINGS; i++) {
+			if (data.low_latency[i]) {
+				n_non_lowlat -= data.n_interfaces[i];
+				break;
+			}
+		}
+	}
+
+	if (data.n_low_latency_bindings == 1 && n_non_lowlat) {
+		/*
+		 * Reserve quota for the low latency binding in case that
+		 * there are several data bindings but only a single
+		 * low latency one. Split the rest of the quota equally
+		 * between the other data interfaces.
+		 */
+		quota = (QUOTA_100 - QUOTA_LOWLAT_MIN) / n_non_lowlat;
+		quota_rem = QUOTA_100 - n_non_lowlat * quota -
+			    QUOTA_LOWLAT_MIN;
+		IWL_DEBUG_QUOTA(mvm,
+				"quota: low-latency binding active, remaining quota per other binding: %d\n",
+				quota);
+	} else if (num_active_macs) {
+		/*
+		 * There are 0 or more than 1 low latency bindings, or all the
+		 * data interfaces belong to the single low latency binding.
+		 * Split the quota equally between the data interfaces.
+		 */
+		quota = QUOTA_100 / num_active_macs;
+		quota_rem = QUOTA_100 % num_active_macs;
+		IWL_DEBUG_QUOTA(mvm,
+				"quota: splitting evenly per binding: %d\n",
+				quota);
+	} else {
+		/* values don't really matter - won't be used */
+		quota = 0;
+		quota_rem = 0;
+	}
+
+	for (idx = 0, i = 0; i < MAX_BINDINGS; i++) {
+		if (data.colors[i] < 0)
+			continue;
+
+		qdata = iwl_mvm_quota_cmd_get_quota(mvm, &cmd, idx);
+
+		qdata->id_and_color =
+			cpu_to_le32(FW_CMD_ID_AND_COLOR(i, data.colors[i]));
+
+		if (data.n_interfaces[i] <= 0)
+			qdata->quota = cpu_to_le32(0);
+#ifdef CONFIG_IWLWIFI_DEBUGFS
+		else if (data.dbgfs_min[i])
+			qdata->quota =
+				cpu_to_le32(data.dbgfs_min[i] * QUOTA_100 / 100);
+#endif
+		else if (data.n_low_latency_bindings == 1 && n_non_lowlat &&
+			 data.low_latency[i])
+			/*
+			 * There is more than one binding, but only one of the
+			 * bindings is in low latency. For this case, allocate
+			 * the minimal required quota for the low latency
+			 * binding.
+			 */
+			qdata->quota = cpu_to_le32(QUOTA_LOWLAT_MIN);
+		else
+			qdata->quota =
+				cpu_to_le32(quota * data.n_interfaces[i]);
+
+		WARN_ONCE(le32_to_cpu(qdata->quota) > QUOTA_100,
+			  "Binding=%d, quota=%u > max=%u\n",
+			  idx, le32_to_cpu(qdata->quota), QUOTA_100);
+
+		qdata->max_duration = cpu_to_le32(0);
+
+		idx++;
+	}
+
+	/* Give the remainder of the session to the first data binding */
+	for (i = 0; i < MAX_BINDINGS; i++) {
+		qdata = iwl_mvm_quota_cmd_get_quota(mvm, &cmd, i);
+		if (le32_to_cpu(qdata->quota) != 0) {
+			le32_add_cpu(&qdata->quota, quota_rem);
+			IWL_DEBUG_QUOTA(mvm,
+					"quota: giving remainder of %d to binding %d\n",
+					quota_rem, i);
+			break;
+		}
+	}
+
+	iwl_mvm_adjust_quota_for_noa(mvm, &cmd);
+
+	/* check that we have non-zero quota for all valid bindings */
+	for (i = 0; i < MAX_BINDINGS; i++) {
+		qdata = iwl_mvm_quota_cmd_get_quota(mvm, &cmd, i);
+		last_data = iwl_mvm_quota_cmd_get_quota(mvm, last, i);
+		if (qdata->id_and_color != last_data->id_and_color)
+			send = true;
+		if (qdata->max_duration != last_data->max_duration)
+			send = true;
+		if (abs((int)le32_to_cpu(qdata->quota) -
+			(int)le32_to_cpu(last_data->quota))
+						> IWL_MVM_QUOTA_THRESHOLD)
+			send = true;
+		if (qdata->id_and_color == cpu_to_le32(FW_CTXT_INVALID))
+			continue;
+		WARN_ONCE(qdata->quota == 0,
+			  "zero quota on binding %d\n", i);
+	}
+
+	if (!send && !force_update) {
+		/* don't send a practically unchanged command, the firmware has
+		 * to re-initialize a lot of state and that can have an adverse
+		 * impact on it
+		 */
+		return 0;
+	}
+
+	err = iwl_mvm_send_cmd_pdu(mvm, TIME_QUOTA_CMD, 0,
+				   iwl_mvm_quota_cmd_size(mvm), &cmd);
+
+	if (err)
+		IWL_ERR(mvm, "Failed to send quota: %d\n", err);
+	else
+		mvm->last_quota_cmd = cmd;
+	return err;
+}