// SPDX-License-Identifier: GPL-2.0-only/* * mac80211 debugfs for wireless PHYs * * Copyright 2007	Johannes Berg <johannes@sipsolutions.net> * Copyright 2013-2014  Intel Mobile Communications GmbH * Copyright (C) 2018 - 2019, 2021-2025 Intel Corporation */ #include <linux/debugfs.h>#include <linux/rtnetlink.h>#include <linux/vmalloc.h>#include "ieee80211_i.h"#include "driver-ops.h"#include "rate.h"#include "debugfs.h" #define DEBUGFS_FORMAT_BUFFER_SIZE 100 int mac80211_format_buffer(char __user *userbuf, size_t count,				  loff_t *ppos, char *fmt, ...){	va_list args;	char buf[DEBUGFS_FORMAT_BUFFER_SIZE];	int res; 	va_start(args, fmt);	res = vscnprintf(buf, sizeof(buf), fmt, args);	va_end(args); 	return simple_read_from_buffer(userbuf, count, ppos, buf, res);} #define DEBUGFS_READONLY_FILE_FN(name, fmt, value...)			\static ssize_t name## _read(struct file *file, char __user *userbuf,	\			    size_t count, loff_t *ppos)			\{									\	struct ieee80211_local *local = file->private_data;		\									\	return mac80211_format_buffer(userbuf, count, ppos, 		\				      fmt "\n", ##value);		\} #define DEBUGFS_READONLY_FILE_OPS(name)			\static const struct debugfs_short_fops name## _ops = {				\	.read = name## _read,						\	.llseek = generic_file_llseek,					\}; #define DEBUGFS_READONLY_FILE(name, fmt, value...)		\	DEBUGFS_READONLY_FILE_FN(name, fmt, value)		\	DEBUGFS_READONLY_FILE_OPS(name) #define DEBUGFS_ADD(name)						\	debugfs_create_file(#name, 0400, phyd, local, &name## _ops) #define DEBUGFS_ADD_MODE(name, mode)					\	debugfs_create_file(#name, mode, phyd, local, &name## _ops);  DEBUGFS_READONLY_FILE(hw_conf, "%x",		      local->hw.conf.flags);DEBUGFS_READONLY_FILE(user_power, "%d",		      local->user_power_level);DEBUGFS_READONLY_FILE(power, "%d",		      local->hw.conf.power_level);DEBUGFS_READONLY_FILE(total_ps_buffered, "%d",		      local->total_ps_buffered);DEBUGFS_READONLY_FILE(wep_iv, "%#08x",		      local->wep_iv & 0xffffff);DEBUGFS_READONLY_FILE(rate_ctrl_alg, "%s",	local->rate_ctrl ? local->rate_ctrl->ops->name : "hw/driver"); static ssize_t aqm_read(struct file *file,			char __user *user_buf,			size_t count,			loff_t *ppos){	struct ieee80211_local *local = file->private_data;	struct fq *fq = &local->fq;	char buf[200];	int len = 0; 	spin_lock_bh(&local->fq.lock); 	len = scnprintf(buf, sizeof(buf),			"access name value\n"			"R fq_flows_cnt %u\n"			"R fq_backlog %u\n"			"R fq_overlimit %u\n"			"R fq_overmemory %u\n"			"R fq_collisions %u\n"			"R fq_memory_usage %u\n"			"RW fq_memory_limit %u\n"			"RW fq_limit %u\n"			"RW fq_quantum %u\n",			fq->flows_cnt,			fq->backlog,			fq->overmemory,			fq->overlimit,			fq->collisions,			fq->memory_usage,			fq->memory_limit,			fq->limit,			fq->quantum); 	spin_unlock_bh(&local->fq.lock); 	return simple_read_from_buffer(user_buf, count, ppos,				       buf, len);} static ssize_t aqm_write(struct file *file,			 const char __user *user_buf,			 size_t count,			 loff_t *ppos){	struct ieee80211_local *local = file->private_data;	char buf[100]; 	if (count >= sizeof(buf))		return -EINVAL; 	if (copy_from_user(buf, user_buf, count))		return -EFAULT; 	if (count && buf[count - 1] == '\n')		buf[count - 1] = '\0';	else		buf[count] = '\0'; 	if (sscanf(buf, "fq_limit %u", &local->fq.limit) == 1)		return count;	else if (sscanf(buf, "fq_memory_limit %u", &local->fq.memory_limit) == 1)		return count;	else if (sscanf(buf, "fq_quantum %u", &local->fq.quantum) == 1)		return count; 	return -EINVAL;} static const struct debugfs_short_fops aqm_ops = {	.write = aqm_write,	.read = aqm_read,	.llseek = default_llseek,}; static ssize_t airtime_flags_read(struct file *file,				  char __user *user_buf,				  size_t count, loff_t *ppos){	struct ieee80211_local *local = file->private_data;	char buf[128] = {}, *pos, *end; 	pos = buf;	end = pos + sizeof(buf) - 1; 	if (local->airtime_flags & AIRTIME_USE_TX)		pos += scnprintf(pos, end - pos, "AIRTIME_TX\t(%lx)\n",				 AIRTIME_USE_TX);	if (local->airtime_flags & AIRTIME_USE_RX)		pos += scnprintf(pos, end - pos, "AIRTIME_RX\t(%lx)\n",				 AIRTIME_USE_RX); 	return simple_read_from_buffer(user_buf, count, ppos, buf,				       strlen(buf));} static ssize_t airtime_flags_write(struct file *file,				   const char __user *user_buf,				   size_t count, loff_t *ppos){	struct ieee80211_local *local = file->private_data;	char buf[16]; 	if (count >= sizeof(buf))		return -EINVAL; 	if (copy_from_user(buf, user_buf, count))		return -EFAULT; 	if (count && buf[count - 1] == '\n')		buf[count - 1] = '\0';	else		buf[count] = '\0'; 	if (kstrtou16(buf, 0, &local->airtime_flags))		return -EINVAL; 	return count;} static const struct debugfs_short_fops airtime_flags_ops = {	.write = airtime_flags_write,	.read = airtime_flags_read,	.llseek = default_llseek,}; static ssize_t aql_pending_read(struct file *file,				char __user *user_buf,				size_t count, loff_t *ppos){	struct ieee80211_local *local = file->private_data;	char buf[400];	int len = 0; 	len = scnprintf(buf, sizeof(buf),			"AC     AQL pending\n"			"VO     %u us\n"			"VI     %u us\n"			"BE     %u us\n"			"BK     %u us\n"			"total  %u us\n",			atomic_read(&local->aql_ac_pending_airtime[IEEE80211_AC_VO]),			atomic_read(&local->aql_ac_pending_airtime[IEEE80211_AC_VI]),			atomic_read(&local->aql_ac_pending_airtime[IEEE80211_AC_BE]),			atomic_read(&local->aql_ac_pending_airtime[IEEE80211_AC_BK]),			atomic_read(&local->aql_total_pending_airtime));	return simple_read_from_buffer(user_buf, count, ppos,				       buf, len);} static const struct debugfs_short_fops aql_pending_ops = {	.read = aql_pending_read,	.llseek = default_llseek,}; static ssize_t aql_txq_limit_read(struct file *file,				  char __user *user_buf,				  size_t count,				  loff_t *ppos){	struct ieee80211_local *local = file->private_data;	char buf[400];	int len = 0; 	len = scnprintf(buf, sizeof(buf),			"AC	AQL limit low	AQL limit high\n"			"VO	%u		%u\n"			"VI	%u		%u\n"			"BE	%u		%u\n"			"BK	%u		%u\n",			local->aql_txq_limit_low[IEEE80211_AC_VO],			local->aql_txq_limit_high[IEEE80211_AC_VO],			local->aql_txq_limit_low[IEEE80211_AC_VI],			local->aql_txq_limit_high[IEEE80211_AC_VI],			local->aql_txq_limit_low[IEEE80211_AC_BE],			local->aql_txq_limit_high[IEEE80211_AC_BE],			local->aql_txq_limit_low[IEEE80211_AC_BK],			local->aql_txq_limit_high[IEEE80211_AC_BK]);	return simple_read_from_buffer(user_buf, count, ppos,				       buf, len);} static ssize_t aql_txq_limit_write(struct file *file,				   const char __user *user_buf,				   size_t count,				   loff_t *ppos){	struct ieee80211_local *local = file->private_data;	char buf[100];	u32 ac, q_limit_low, q_limit_high, q_limit_low_old, q_limit_high_old;	struct sta_info *sta; 	if (count >= sizeof(buf))		return -EINVAL; 	if (copy_from_user(buf, user_buf, count))		return -EFAULT; 	if (count && buf[count - 1] == '\n')		buf[count - 1] = '\0';	else		buf[count] = '\0'; 	if (sscanf(buf, "%u %u %u", &ac, &q_limit_low, &q_limit_high) != 3)		return -EINVAL; 	if (ac >= IEEE80211_NUM_ACS)		return -EINVAL; 	q_limit_low_old = local->aql_txq_limit_low[ac];	q_limit_high_old = local->aql_txq_limit_high[ac]; 	guard(wiphy)(local->hw.wiphy); 	local->aql_txq_limit_low[ac] = q_limit_low;	local->aql_txq_limit_high[ac] = q_limit_high; 	list_for_each_entry(sta, &local->sta_list, list) {		/* If a sta has customized queue limits, keep it */		if (sta->airtime[ac].aql_limit_low == q_limit_low_old &&		    sta->airtime[ac].aql_limit_high == q_limit_high_old) {			sta->airtime[ac].aql_limit_low = q_limit_low;			sta->airtime[ac].aql_limit_high = q_limit_high;		}	} 	return count;} static const struct debugfs_short_fops aql_txq_limit_ops = {	.write = aql_txq_limit_write,	.read = aql_txq_limit_read,	.llseek = default_llseek,}; static ssize_t aql_enable_read(struct file *file, char __user *user_buf,			       size_t count, loff_t *ppos){	char buf[3];	int len; 	len = scnprintf(buf, sizeof(buf), "%d\n",			!static_key_false(&aql_disable.key)); 	return simple_read_from_buffer(user_buf, count, ppos, buf, len);} static ssize_t aql_enable_write(struct file *file, const char __user *user_buf,				size_t count, loff_t *ppos){	bool val;	int ret; 	ret = kstrtobool_from_user(user_buf, count, &val);	if (unlikely(ret))		return ret; 	if (val)		static_branch_disable(&aql_disable);	else		static_branch_enable(&aql_disable); 	return count;} static const struct debugfs_short_fops aql_enable_ops = {	.write = aql_enable_write,	.read = aql_enable_read,	.llseek = default_llseek,}; static ssize_t force_tx_status_read(struct file *file,				    char __user *user_buf,				    size_t count,				    loff_t *ppos){	struct ieee80211_local *local = file->private_data;	char buf[3];	int len = 0; 	len = scnprintf(buf, sizeof(buf), "%d\n", (int)local->force_tx_status); 	return simple_read_from_buffer(user_buf, count, ppos,				       buf, len);} static ssize_t force_tx_status_write(struct file *file,				     const char __user *user_buf,				     size_t count,				     loff_t *ppos){	struct ieee80211_local *local = file->private_data;	bool val;	int ret; 	ret = kstrtobool_from_user(user_buf, count, &val);	if (unlikely(ret))		return ret; 	local->force_tx_status = val;	return count;} static const struct debugfs_short_fops force_tx_status_ops = {	.write = force_tx_status_write,	.read = force_tx_status_read,	.llseek = default_llseek,}; #ifdef CONFIG_PMstatic ssize_t reset_write(struct file *file, const char __user *user_buf,			   size_t count, loff_t *ppos){	struct ieee80211_local *local = file->private_data;	int ret; 	rtnl_lock();	wiphy_lock(local->hw.wiphy);	__ieee80211_suspend(&local->hw, NULL);	ret = __ieee80211_resume(&local->hw);	wiphy_unlock(local->hw.wiphy); 	if (ret)		cfg80211_shutdown_all_interfaces(local->hw.wiphy); 	rtnl_unlock(); 	return count;} static const struct debugfs_short_fops reset_ops = {	.write = reset_write,	.llseek = noop_llseek,};#endif static const char *hw_flag_names[] = {#define FLAG(F)	[IEEE80211_HW_##F] = #F	FLAG(HAS_RATE_CONTROL),	FLAG(RX_INCLUDES_FCS),	FLAG(HOST_BROADCAST_PS_BUFFERING),	FLAG(SIGNAL_UNSPEC),	FLAG(SIGNAL_DBM),	FLAG(NEED_DTIM_BEFORE_ASSOC),	FLAG(SPECTRUM_MGMT),	FLAG(AMPDU_AGGREGATION),	FLAG(SUPPORTS_PS),	FLAG(PS_NULLFUNC_STACK),	FLAG(SUPPORTS_DYNAMIC_PS),	FLAG(MFP_CAPABLE),	FLAG(WANT_MONITOR_VIF),	FLAG(NO_VIRTUAL_MONITOR),	FLAG(NO_AUTO_VIF),	FLAG(SW_CRYPTO_CONTROL),	FLAG(SUPPORT_FAST_XMIT),	FLAG(REPORTS_TX_ACK_STATUS),	FLAG(CONNECTION_MONITOR),	FLAG(QUEUE_CONTROL),	FLAG(SUPPORTS_PER_STA_GTK),	FLAG(AP_LINK_PS),	FLAG(TX_AMPDU_SETUP_IN_HW),	FLAG(SUPPORTS_RC_TABLE),	FLAG(P2P_DEV_ADDR_FOR_INTF),	FLAG(TIMING_BEACON_ONLY),	FLAG(SUPPORTS_HT_CCK_RATES),	FLAG(CHANCTX_STA_CSA),	FLAG(SUPPORTS_CLONED_SKBS),	FLAG(SINGLE_SCAN_ON_ALL_BANDS),	FLAG(TDLS_WIDER_BW),	FLAG(SUPPORTS_AMSDU_IN_AMPDU),	FLAG(BEACON_TX_STATUS),	FLAG(NEEDS_UNIQUE_STA_ADDR),	FLAG(SUPPORTS_REORDERING_BUFFER),	FLAG(USES_RSS),	FLAG(TX_AMSDU),	FLAG(TX_FRAG_LIST),	FLAG(REPORTS_LOW_ACK),	FLAG(SUPPORTS_TX_FRAG),	FLAG(SUPPORTS_TDLS_BUFFER_STA),	FLAG(DOESNT_SUPPORT_QOS_NDP),	FLAG(BUFF_MMPDU_TXQ),	FLAG(SUPPORTS_VHT_EXT_NSS_BW),	FLAG(STA_MMPDU_TXQ),	FLAG(TX_STATUS_NO_AMPDU_LEN),	FLAG(SUPPORTS_MULTI_BSSID),	FLAG(SUPPORTS_ONLY_HE_MULTI_BSSID),	FLAG(AMPDU_KEYBORDER_SUPPORT),	FLAG(SUPPORTS_TX_ENCAP_OFFLOAD),	FLAG(SUPPORTS_RX_DECAP_OFFLOAD),	FLAG(SUPPORTS_CONC_MON_RX_DECAP),	FLAG(DETECTS_COLOR_COLLISION),	FLAG(MLO_MCAST_MULTI_LINK_TX),	FLAG(DISALLOW_PUNCTURING),	FLAG(HANDLES_QUIET_CSA),	FLAG(STRICT),	FLAG(SUPPORTS_NDP_BLOCKACK),#undef FLAG}; static ssize_t hwflags_read(struct file *file, char __user *user_buf,			    size_t count, loff_t *ppos){	struct ieee80211_local *local = file->private_data;	size_t bufsz = 30 * NUM_IEEE80211_HW_FLAGS;	char *buf = kzalloc(bufsz, GFP_KERNEL);	char *pos = buf, *end = buf + bufsz - 1;	ssize_t rv;	int i; 	if (!buf)		return -ENOMEM; 	/* fail compilation if somebody adds or removes	 * a flag without updating the name array above	 */	BUILD_BUG_ON(ARRAY_SIZE(hw_flag_names) != NUM_IEEE80211_HW_FLAGS); 	for (i = 0; i < NUM_IEEE80211_HW_FLAGS; i++) {		if (test_bit(i, local->hw.flags))			pos += scnprintf(pos, end - pos, "%s\n",					 hw_flag_names[i]);	} 	rv = simple_read_from_buffer(user_buf, count, ppos, buf, strlen(buf));	kfree(buf);	return rv;} 

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