drivers/net/wireless/intel/iwlwifi/mvm/quota.c - linux - Git at Google

 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
 /*
  * Copyright (C) 2012-2014, 2018 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->phy_ctxt)
 		return;

 	/* currently, PHY ID == binding ID */
 	id = mvmvif->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->bss_conf.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->phy_ctxt->color;
 	else
 		WARN_ON_ONCE(data->colors[id] != mvmvif->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->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;
 }
	// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
	/*
	* Copyright (C) 2012-2014, 2018 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->phy_ctxt)
	return;

	/* currently, PHY ID == binding ID */
	id = mvmvif->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->bss_conf.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->phy_ctxt->color;
	else
	WARN_ON_ONCE(data->colors[id] != mvmvif->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->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;
	}