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>

1 files changed, 42 insertions, 8 deletions

diff --git a/drivers/net/wireless/mac80211_hwsim.c b/drivers/net/wireless/mac80211_hwsim.c
index 76b362ed76bd..bad66e3cdd12 100644
--- 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,