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mac80211_hwsim: Add debugfs to control rx status RSSI

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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>
This commit is contained in:
Beni Lev 2022-02-10 20:16:50 +01:00 • committed by Johannes Berg
parent 08bc13d8ef
commit b59fb54611
1 changed files with 34 additions and 2 deletions
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36
drivers/net/wireless/mac80211_hwsim.c
View file

@ -503,6 +503,8 @@ static const struct ieee80211_rate hwsim_rates[] = {
{ .bitrate = 540 } { .bitrate = 540 }
}; };
#define DEFAULT_RX_RSSI -50
static const u32 hwsim_ciphers[] = { static const u32 hwsim_ciphers[] = {
WLAN_CIPHER_SUITE_WEP40, WLAN_CIPHER_SUITE_WEP40,
WLAN_CIPHER_SUITE_WEP104, WLAN_CIPHER_SUITE_WEP104,
@ -690,6 +692,9 @@ struct mac80211_hwsim_data {
u64 rx_bytes; u64 rx_bytes;
u64 tx_dropped; u64 tx_dropped;
u64 tx_failed; u64 tx_failed;
/* RSSI in rx status of the receiver */
int rx_rssi;
}; };
static const struct rhashtable_params hwsim_rht_params = { 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, hwsim_fops_group_read, hwsim_fops_group_write,
"%llx\n"); "%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, static netdev_tx_t hwsim_mon_xmit(struct sk_buff *skb,
struct net_device *dev) 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; rx_status.bw = RATE_INFO_BW_20;
if (info->control.rates[0].flags & IEEE80211_TX_RC_SHORT_GI) if (info->control.rates[0].flags & IEEE80211_TX_RC_SHORT_GI)
rx_status.enc_flags |= RX_ENC_FLAG_SHORT_GI; rx_status.enc_flags |= RX_ENC_FLAG_SHORT_GI;
/* TODO: simulate real signal strength (and optional packet loss) */ /* TODO: simulate optional packet loss */
rx_status.signal = -50; rx_status.signal = data->rx_rssi;
if (info->control.vif) if (info->control.vif)
rx_status.signal += info->control.vif->bss_conf.txpower; 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; 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_start, hw_roc_start);
INIT_DELAYED_WORK(&data->roc_done, hw_roc_done); INIT_DELAYED_WORK(&data->roc_done, hw_roc_done);
INIT_DELAYED_WORK(&data->hw_scan, hw_scan_work); 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("ps", 0666, data->debugfs, data, &hwsim_fops_ps);
debugfs_create_file("group", 0666, data->debugfs, data, debugfs_create_file("group", 0666, data->debugfs, data,
&hwsim_fops_group); &hwsim_fops_group);
debugfs_create_file("rx_rssi", 0666, data->debugfs, data,
&hwsim_fops_rx_rssi);
if (!data->use_chanctx) if (!data->use_chanctx)
debugfs_create_file("dfs_simulate_radar", 0222, debugfs_create_file("dfs_simulate_radar", 0222,
data->debugfs, data->debugfs,