mac80211_hwsim: Add iface comb for DFS

Add iface combination that will allow DFS
support. Add also debugfs dfs_simulate_radar
file that can be used to simulate radar event.
This could be useful for mac80211/cfg80211/
regulatory/hostap code testing without real HW.

Signed-off-by: Janusz Dziedzic <janusz.dziedzic@tieto.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

diff --git a/drivers/net/wireless/mac80211_hwsim.c b/drivers/net/wireless/mac80211_hwsim.c
index 76b362ed76bd3ad8c8c7b3ea54a2b11ad65b744b..bad66e3cdd12e4d387a0c3f476b556f1123ff28b 100644 (file)
--- a/drivers/net/wireless/mac80211_hwsim.c
+++ b/drivers/net/wireless/mac80211_hwsim.c
@@ -1889,6 +1889,17 @@ static int hwsim_fops_ps_write(void *dat, u64 val)
 DEFINE_SIMPLE_ATTRIBUTE(hwsim_fops_ps, hwsim_fops_ps_read, hwsim_fops_ps_write,
                        "%llu\n");
 
+static int hwsim_write_simulate_radar(void *dat, u64 val)
+{
+       struct mac80211_hwsim_data *data = dat;
+
+       ieee80211_radar_detected(data->hw);
+
+       return 0;
+}
+
+DEFINE_SIMPLE_ATTRIBUTE(hwsim_simulate_radar, NULL,
+                       hwsim_write_simulate_radar, "%llu\n");
 
 static int hwsim_fops_group_read(void *dat, u64 *val)
 {
@@ -2190,11 +2201,28 @@ static const struct ieee80211_iface_limit hwsim_if_limits[] = {
        { .max = 1, .types = BIT(NL80211_IFTYPE_P2P_DEVICE) },
 };
 
-static struct ieee80211_iface_combination hwsim_if_comb = {
-       .limits = hwsim_if_limits,
-       .n_limits = ARRAY_SIZE(hwsim_if_limits),
-       .max_interfaces = 2048,
-       .num_different_channels = 1,
+static const struct ieee80211_iface_limit hwsim_if_dfs_limits[] = {
+       { .max = 8, .types = BIT(NL80211_IFTYPE_AP) },
+};
+
+static struct ieee80211_iface_combination hwsim_if_comb[] = {
+       {
+               .limits = hwsim_if_limits,
+               .n_limits = ARRAY_SIZE(hwsim_if_limits),
+               .max_interfaces = 2048,
+               .num_different_channels = 1,
+       },
+       {
+               .limits = hwsim_if_dfs_limits,
+               .n_limits = ARRAY_SIZE(hwsim_if_dfs_limits),
+               .max_interfaces = 8,
+               .num_different_channels = 1,
+               .radar_detect_widths = BIT(NL80211_CHAN_WIDTH_20_NOHT) |
+                                      BIT(NL80211_CHAN_WIDTH_20) |
+                                      BIT(NL80211_CHAN_WIDTH_40) |
+                                      BIT(NL80211_CHAN_WIDTH_80) |
+                                      BIT(NL80211_CHAN_WIDTH_160),
+       }
 };
 
 static int __init init_mac80211_hwsim(void)
@@ -2212,7 +2240,7 @@ static int __init init_mac80211_hwsim(void)
                return -EINVAL;
 
        if (channels > 1) {
-               hwsim_if_comb.num_different_channels = channels;
+               hwsim_if_comb[0].num_different_channels = channels;
                mac80211_hwsim_ops.hw_scan = mac80211_hwsim_hw_scan;
                mac80211_hwsim_ops.cancel_hw_scan =
                        mac80211_hwsim_cancel_hw_scan;
@@ -2292,13 +2320,15 @@ static int __init init_mac80211_hwsim(void)
                hw->wiphy->n_addresses = 2;
                hw->wiphy->addresses = data->addresses;
 
-               hw->wiphy->iface_combinations = &hwsim_if_comb;
-               hw->wiphy->n_iface_combinations = 1;
+               hw->wiphy->iface_combinations = hwsim_if_comb;
+               hw->wiphy->n_iface_combinations = ARRAY_SIZE(hwsim_if_comb);
 
                if (channels > 1) {
                        hw->wiphy->max_scan_ssids = 255;
                        hw->wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN;
                        hw->wiphy->max_remain_on_channel_duration = 1000;
+                       /* For channels > 1 DFS is not allowed */
+                       hw->wiphy->n_iface_combinations = 1;
                }
 
                INIT_DELAYED_WORK(&data->roc_done, hw_roc_done);
@@ -2534,6 +2564,10 @@ static int __init init_mac80211_hwsim(void)
                                    &hwsim_fops_ps);
                debugfs_create_file("group", 0666, data->debugfs, data,
                                    &hwsim_fops_group);
+               if (channels == 1)
+                       debugfs_create_file("dfs_simulate_radar", 0222,
+                                           data->debugfs,
+                                           data, &hwsim_simulate_radar);
 
                tasklet_hrtimer_init(&data->beacon_timer,
                                     mac80211_hwsim_beacon,