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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: Beni Lev <beni.lev@intel.com> Link: https://lore.kernel.org/r/20220210201649.dddebbb55a7f.I6c0607694587b577070339078829fcc20dfcfe2c@changeid Signed-off-by: Johannes Berg <johannes.berg@intel.com>
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@ -503,6 +503,8 @@ static const struct ieee80211_rate hwsim_rates[] = {
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{ .bitrate = 540 }
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};
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#define DEFAULT_RX_RSSI -50
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static const u32 hwsim_ciphers[] = {
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WLAN_CIPHER_SUITE_WEP40,
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WLAN_CIPHER_SUITE_WEP104,
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@ -690,6 +692,9 @@ struct mac80211_hwsim_data {
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u64 rx_bytes;
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u64 tx_dropped;
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u64 tx_failed;
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/* RSSI in rx status of the receiver */
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int rx_rssi;
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};
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static const struct rhashtable_params hwsim_rht_params = {
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@ -964,6 +969,29 @@ DEFINE_DEBUGFS_ATTRIBUTE(hwsim_fops_group,
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hwsim_fops_group_read, hwsim_fops_group_write,
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"%llx\n");
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static int hwsim_fops_rx_rssi_read(void *dat, u64 *val)
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{
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struct mac80211_hwsim_data *data = dat;
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*val = data->rx_rssi;
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return 0;
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}
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static int hwsim_fops_rx_rssi_write(void *dat, u64 val)
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{
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struct mac80211_hwsim_data *data = dat;
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int rssi = (int)val;
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if (rssi >= 0 || rssi < -100)
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return -EINVAL;
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data->rx_rssi = rssi;
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return 0;
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}
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DEFINE_SIMPLE_ATTRIBUTE(hwsim_fops_rx_rssi,
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hwsim_fops_rx_rssi_read, hwsim_fops_rx_rssi_write,
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"%lld\n");
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static netdev_tx_t hwsim_mon_xmit(struct sk_buff *skb,
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struct net_device *dev)
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{
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@ -1482,8 +1510,8 @@ static bool mac80211_hwsim_tx_frame_no_nl(struct ieee80211_hw *hw,
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rx_status.bw = RATE_INFO_BW_20;
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if (info->control.rates[0].flags & IEEE80211_TX_RC_SHORT_GI)
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rx_status.enc_flags |= RX_ENC_FLAG_SHORT_GI;
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/* TODO: simulate real signal strength (and optional packet loss) */
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rx_status.signal = -50;
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/* TODO: simulate optional packet loss */
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rx_status.signal = data->rx_rssi;
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if (info->control.vif)
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rx_status.signal += info->control.vif->bss_conf.txpower;
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@ -3309,6 +3337,8 @@ static int mac80211_hwsim_new_radio(struct genl_info *info,
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hw->wiphy->n_cipher_suites = param->n_ciphers;
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}
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data->rx_rssi = DEFAULT_RX_RSSI;
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INIT_DELAYED_WORK(&data->roc_start, hw_roc_start);
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INIT_DELAYED_WORK(&data->roc_done, hw_roc_done);
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INIT_DELAYED_WORK(&data->hw_scan, hw_scan_work);
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@ -3500,6 +3530,8 @@ static int mac80211_hwsim_new_radio(struct genl_info *info,
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debugfs_create_file("ps", 0666, data->debugfs, data, &hwsim_fops_ps);
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debugfs_create_file("group", 0666, data->debugfs, data,
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&hwsim_fops_group);
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debugfs_create_file("rx_rssi", 0666, data->debugfs, data,
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&hwsim_fops_rx_rssi);
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if (!data->use_chanctx)
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debugfs_create_file("dfs_simulate_radar", 0222,
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data->debugfs,
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