Commit b59fb546 authored by Beni Lev's avatar Beni Lev Committed by Johannes Berg
Browse files

mac80211_hwsim: Add debugfs to control rx status RSSI 



Set the base RSSI of a TX frame. The final RSSI of the frame will be
the base RSSI + the radio's TX power

Signed-off-by: default avatarBeni Lev <beni.lev@intel.com>
Link: https://lore.kernel.org/r/20220210201649.dddebbb55a7f.I6c0607694587b577070339078829fcc20dfcfe2c@changeid


Signed-off-by: default avatarJohannes Berg <johannes.berg@intel.com>
parent 08bc13d8

drivers/net/wireless/mac80211_hwsim.c

+34 −2
Original line number Diff line number Diff line
@@ -503,6 +503,8 @@ static const struct ieee80211_rate hwsim_rates[] = { 
	{ .bitrate = 540 }

};



#define DEFAULT_RX_RSSI -50



static const u32 hwsim_ciphers[] = {

	WLAN_CIPHER_SUITE_WEP40,

	WLAN_CIPHER_SUITE_WEP104,
@@ -690,6 +692,9 @@ struct mac80211_hwsim_data { 
	u64 rx_bytes;

	u64 tx_dropped;

	u64 tx_failed;



	/* RSSI in rx status of the receiver */

	int rx_rssi;

};



static const struct rhashtable_params hwsim_rht_params = {
@@ -964,6 +969,29 @@ DEFINE_DEBUGFS_ATTRIBUTE(hwsim_fops_group, 
			 hwsim_fops_group_read, hwsim_fops_group_write,

			 "%llx\n");



static int hwsim_fops_rx_rssi_read(void *dat, u64 *val)

{

	struct mac80211_hwsim_data *data = dat;

	*val = data->rx_rssi;

	return 0;

}



static int hwsim_fops_rx_rssi_write(void *dat, u64 val)

{

	struct mac80211_hwsim_data *data = dat;

	int rssi = (int)val;



	if (rssi >= 0 || rssi < -100)

		return -EINVAL;



	data->rx_rssi = rssi;

	return 0;

}



DEFINE_SIMPLE_ATTRIBUTE(hwsim_fops_rx_rssi,

			hwsim_fops_rx_rssi_read, hwsim_fops_rx_rssi_write,

			"%lld\n");



static netdev_tx_t hwsim_mon_xmit(struct sk_buff *skb,

					struct net_device *dev)

{
@@ -1482,8 +1510,8 @@ static bool mac80211_hwsim_tx_frame_no_nl(struct ieee80211_hw *hw, 
		rx_status.bw = RATE_INFO_BW_20;

	if (info->control.rates[0].flags & IEEE80211_TX_RC_SHORT_GI)

		rx_status.enc_flags |= RX_ENC_FLAG_SHORT_GI;

	/* TODO: simulate real signal strength (and optional packet loss) */

	rx_status.signal = -50;

	/* TODO: simulate optional packet loss */

	rx_status.signal = data->rx_rssi;

	if (info->control.vif)

		rx_status.signal += info->control.vif->bss_conf.txpower;
@@ -3309,6 +3337,8 @@ static int mac80211_hwsim_new_radio(struct genl_info *info, 
		hw->wiphy->n_cipher_suites = param->n_ciphers;

	}



	data->rx_rssi = DEFAULT_RX_RSSI;



	INIT_DELAYED_WORK(&data->roc_start, hw_roc_start);

	INIT_DELAYED_WORK(&data->roc_done, hw_roc_done);

	INIT_DELAYED_WORK(&data->hw_scan, hw_scan_work);
@@ -3500,6 +3530,8 @@ static int mac80211_hwsim_new_radio(struct genl_info *info, 
	debugfs_create_file("ps", 0666, data->debugfs, data, &hwsim_fops_ps);

	debugfs_create_file("group", 0666, data->debugfs, data,

			    &hwsim_fops_group);

	debugfs_create_file("rx_rssi", 0666, data->debugfs, data,

			    &hwsim_fops_rx_rssi);

	if (!data->use_chanctx)

		debugfs_create_file("dfs_simulate_radar", 0222,

				    data->debugfs,