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Commit a80c1cf9 authored by Johannes Berg's avatar Johannes Berg Committed by Emmanuel Grumbach
Browse files

iwlwifi: mvm: support setting minimum quota from debugfs 



For debug purposes, allow setting minimum quota (for a single
virtual interface) from debugfs. This is an absolute minimum,
so it can only be set up to 95%.

Signed-off-by: default avatarJohannes Berg <johannes.berg@intel.com>
Signed-off-by: default avatarEmmanuel Grumbach <emmanuel.grumbach@intel.com>
parent b525d081

drivers/net/wireless/intel/iwlwifi/mvm/debugfs-vif.c

+56 −0
Original line number Diff line number Diff line
@@ -1372,6 +1372,59 @@ static ssize_t iwl_dbgfs_rx_phyinfo_read(struct file *file, 
	return simple_read_from_buffer(user_buf, count, ppos, buf, sizeof(buf));

}



static void iwl_dbgfs_quota_check(void *data, u8 *mac,

				  struct ieee80211_vif *vif)

{

	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);

	int *ret = data;



	if (mvmvif->dbgfs_quota_min)

		*ret = -EINVAL;

}



static ssize_t iwl_dbgfs_quota_min_write(struct ieee80211_vif *vif, char *buf,

					 size_t count, loff_t *ppos)

{

	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);

	struct iwl_mvm *mvm = mvmvif->mvm;

	u16 value;

	int ret;



	ret = kstrtou16(buf, 0, &value);

	if (ret)

		return ret;



	if (value > 95)

		return -EINVAL;



	mutex_lock(&mvm->mutex);



	mvmvif->dbgfs_quota_min = 0;

	ieee80211_iterate_interfaces(mvm->hw, IEEE80211_IFACE_ITER_NORMAL,

				     iwl_dbgfs_quota_check, &ret);

	if (ret == 0) {

		mvmvif->dbgfs_quota_min = value;

		iwl_mvm_update_quotas(mvm, false, NULL);

	}

	mutex_unlock(&mvm->mutex);



	return ret ?: count;

}



static ssize_t iwl_dbgfs_quota_min_read(struct file *file,

					char __user *user_buf,

					size_t count, loff_t *ppos)

{

	struct ieee80211_vif *vif = file->private_data;

	struct iwl_mvm_vif *mvmvif = iwl_mvm_vif_from_mac80211(vif);

	char buf[10];

	int len;



	len = snprintf(buf, sizeof(buf), "%d\n", mvmvif->dbgfs_quota_min);



	return simple_read_from_buffer(user_buf, count, ppos, buf, len);

}



#define MVM_DEBUGFS_WRITE_FILE_OPS(name, bufsz) \

	_MVM_DEBUGFS_WRITE_FILE_OPS(name, bufsz, struct ieee80211_vif)

#define MVM_DEBUGFS_READ_WRITE_FILE_OPS(name, bufsz) \
@@ -1395,6 +1448,7 @@ MVM_DEBUGFS_READ_WRITE_FILE_OPS(tof_range_req_ext, 32); 
MVM_DEBUGFS_READ_WRITE_FILE_OPS(tof_range_abort, 32);

MVM_DEBUGFS_READ_FILE_OPS(tof_range_response);

MVM_DEBUGFS_READ_WRITE_FILE_OPS(tof_responder_params, 32);

MVM_DEBUGFS_READ_WRITE_FILE_OPS(quota_min, 32);



void iwl_mvm_vif_dbgfs_register(struct iwl_mvm *mvm, struct ieee80211_vif *vif)

{
@@ -1432,6 +1486,8 @@ void iwl_mvm_vif_dbgfs_register(struct iwl_mvm *mvm, struct ieee80211_vif *vif) 
				 S_IRUSR | S_IWUSR);

	MVM_DEBUGFS_ADD_FILE_VIF(rx_phyinfo, mvmvif->dbgfs_dir,

				 S_IRUSR | S_IWUSR);

	MVM_DEBUGFS_ADD_FILE_VIF(quota_min, mvmvif->dbgfs_dir,

				 S_IRUSR | S_IWUSR);



	if (vif->type == NL80211_IFTYPE_STATION && !vif->p2p &&

	    mvmvif == mvm->bf_allowed_vif)

drivers/net/wireless/intel/iwlwifi/mvm/mvm.h

+1 −0
Original line number Diff line number Diff line
@@ -433,6 +433,7 @@ struct iwl_mvm_vif { 
	struct iwl_dbgfs_pm dbgfs_pm;

	struct iwl_dbgfs_bf dbgfs_bf;

	struct iwl_mac_power_cmd mac_pwr_cmd;

	int dbgfs_quota_min;

#endif



	enum ieee80211_smps_mode smps_requests[NUM_IWL_MVM_SMPS_REQ];

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

+16 −0
Original line number Diff line number Diff line
@@ -7,6 +7,7 @@ 
 *

 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.

 * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH

 * Copyright(c) 2016        Intel Deutschland GmbH

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of version 2 of the GNU General Public License as
@@ -33,6 +34,7 @@ 
 *

 * Copyright(c) 2012 - 2014 Intel Corporation. All rights reserved.

 * Copyright(c) 2013 - 2014 Intel Mobile Communications GmbH

 * Copyright(c) 2016        Intel Deutschland GmbH

 * All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without
@@ -74,6 +76,9 @@ 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;

};
@@ -129,6 +134,12 @@ static void iwl_mvm_quota_iterator(void *_data, u8 *mac, 


	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;
@@ -259,6 +270,11 @@ int iwl_mvm_update_quotas(struct iwl_mvm *mvm, 


		if (data.n_interfaces[i] <= 0)

			cmd.quotas[idx].quota = cpu_to_le32(0);

#ifdef CONFIG_IWLWIFI_DEBUGFS

		else if (data.dbgfs_min[i])

			cmd.quotas[idx].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])

			/*