[PATCH v2 21/22] mac80211_hwsim: indicate support for S1G

Thomas Pedersen
2020-08-31T20:56:56Z

Advertise S1G Capabilities and channels to mac80211.

Requires a few fixups to account for missing
sband->bitrates, and a custom regulatory db to actually
enable the S1G channels.

Signed-off-by: Thomas Pedersen <thomas@adapt-ip.com>

---
v2:
- split out changes to ieee80211.h in a separate commit
and use GENMASK + FIELD_GET (Kalle)
---
drivers/net/wireless/mac80211_hwsim.c | 79 ++++++++++++++++++++++++---
1 file changed, 72 insertions(+), 7 deletions(-)

diff --git a/drivers/net/wireless/mac80211_hwsim.c b/drivers/net/wireless/mac80211_hwsim.c
index dce3bc9c9f84..83d8f54ef93e 100644
--- a/drivers/net/wireless/mac80211_hwsim.c
+++ b/drivers/net/wireless/mac80211_hwsim.c
@@ -377,6 +377,49 @@ static const struct ieee80211_channel hwsim_channels_5ghz[] = {
CHAN5G(5925), /* Channel 185 */
};

+#define NUM_S1G_CHANS_US 51
+static struct ieee80211_channel hwsim_channels_s1g[NUM_S1G_CHANS_US];
+
+static const struct ieee80211_sta_s1g_cap hwsim_s1g_cap = {
+ .s1g = true,
+ .cap = { S1G_CAP0_SGI_1MHZ | S1G_CAP0_SGI_2MHZ,
+ 0,
+ 0,
+ S1G_CAP3_MAX_MPDU_LEN,
+ 0,
+ S1G_CAP5_AMPDU,
+ 0,
+ S1G_CAP7_DUP_1MHZ,
+ S1G_CAP8_TWT_RESPOND | S1G_CAP8_TWT_REQUEST,
+ 0},
+ .nss_mcs = { 0xfc | 1, /* MCS 7 for 1 SS */
+ /* RX Highest Supported Long GI Data Rate 0:7 */
+ 0,
+ /* RX Highest Supported Long GI Data Rate 0:7 */
+ /* TX S1G MCS Map 0:6 */
+ 0xfa,
+ /* TX S1G MCS Map :7 */
+ /* TX Highest Supported Long GI Data Rate 0:6 */
+ 0x80,
+ /* TX Highest Supported Long GI Data Rate 7:8 */
+ /* Rx Single spatial stream and S1G-MCS Map for 1MHz */
+ /* Tx Single spatial stream and S1G-MCS Map for 1MHz */
+ 0 },
+};
+
+static void hwsim_init_s1g_channels(struct ieee80211_channel *channels)
+{
+ int ch, freq;
+
+ for (ch = 0; ch < NUM_S1G_CHANS_US; ch++) {
+ freq = 902000 + (ch + 1) * 500;
+ channels[ch].band = NL80211_BAND_S1GHZ;
+ channels[ch].center_freq = KHZ_TO_MHZ(freq);
+ channels[ch].freq_offset = freq % 1000;
+ channels[ch].hw_value = ch + 1;
+ }
+}
+
static const struct ieee80211_rate hwsim_rates[] = {
{ .bitrate = 10 },
{ .bitrate = 20, .flags = IEEE80211_RATE_SHORT_PREAMBLE },
@@ -505,6 +548,7 @@ struct mac80211_hwsim_data {
struct ieee80211_supported_band bands[NUM_NL80211_BANDS];
struct ieee80211_channel channels_2ghz[ARRAY_SIZE(hwsim_channels_2ghz)];
struct ieee80211_channel channels_5ghz[ARRAY_SIZE(hwsim_channels_5ghz)];
+ struct ieee80211_channel channels_s1g[ARRAY_SIZE(hwsim_channels_s1g)];
struct ieee80211_rate rates[ARRAY_SIZE(hwsim_rates)];
struct ieee80211_iface_combination if_combination;
struct ieee80211_iface_limit if_limits[3];
@@ -900,12 +944,14 @@ static void mac80211_hwsim_monitor_rx(struct ieee80211_hw *hw,
struct mac80211_hwsim_data *data = hw->priv;
struct sk_buff *skb;
struct hwsim_radiotap_hdr *hdr;
- u16 flags;
+ u16 flags, bitrate;
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx_skb);
struct ieee80211_rate *txrate = ieee80211_get_tx_rate(hw, info);

- if (WARN_ON(!txrate))
- return;
+ if (!txrate)
+ bitrate = 0;
+ else
+ bitrate = txrate->bitrate;

if (!netif_running(hwsim_mon))
return;
@@ -924,10 +970,10 @@ static void mac80211_hwsim_monitor_rx(struct ieee80211_hw *hw,
(1 << IEEE80211_RADIOTAP_CHANNEL));
hdr->rt_tsft = __mac80211_hwsim_get_tsf(data);
hdr->rt_flags = 0;
- hdr->rt_rate = txrate->bitrate / 5;
+ hdr->rt_rate = bitrate / 5;
hdr->rt_channel = cpu_to_le16(chan->center_freq);
flags = IEEE80211_CHAN_2GHZ;
- if (txrate->flags & IEEE80211_RATE_ERP_G)
+ if (txrate && txrate->flags & IEEE80211_RATE_ERP_G)
flags |= IEEE80211_CHAN_OFDM;
else
flags |= IEEE80211_CHAN_CCK;
@@ -1341,6 +1387,7 @@ static bool mac80211_hwsim_tx_frame_no_nl(struct ieee80211_hw *hw,
memset(&rx_status, 0, sizeof(rx_status));
rx_status.flag |= RX_FLAG_MACTIME_START;
rx_status.freq = chan->center_freq;
+ rx_status.freq_offset = chan->freq_offset ? 1 : 0;
rx_status.band = chan->band;
if (info->control.rates[0].flags & IEEE80211_TX_RC_VHT_MCS) {
rx_status.rate_idx =
@@ -1522,14 +1569,18 @@ static void mac80211_hwsim_tx(struct ieee80211_hw *hw,
/* fake header transmission time */
struct ieee80211_mgmt *mgmt;
struct ieee80211_rate *txrate;
+ /* TODO: get MCS */
+ int bitrate = 100;
u64 ts;

mgmt = (struct ieee80211_mgmt *)skb->data;
txrate = ieee80211_get_tx_rate(hw, txi);
+ if (txrate)
+ bitrate = txrate->bitrate;
ts = mac80211_hwsim_get_tsf_raw();
mgmt->u.probe_resp.timestamp =
cpu_to_le64(ts + data->tsf_offset +
- 24 * 8 * 10 / txrate->bitrate);
+ 24 * 8 * 10 / bitrate);
}

mac80211_hwsim_monitor_rx(hw, skb, channel);
@@ -1664,6 +1715,8 @@ static void mac80211_hwsim_beacon_tx(void *arg, u8 *mac,
struct ieee80211_rate *txrate;
struct ieee80211_mgmt *mgmt;
struct sk_buff *skb;
+ /* TODO: get MCS */
+ int bitrate = 100;

hwsim_check_magic(vif);

@@ -1683,13 +1736,15 @@ static void mac80211_hwsim_beacon_tx(void *arg, u8 *mac,
ARRAY_SIZE(info->control.rates));

txrate = ieee80211_get_tx_rate(hw, info);
+ if (txrate)
+ bitrate = txrate->bitrate;

mgmt = (struct ieee80211_mgmt *) skb->data;
/* fake header transmission time */
data->abs_bcn_ts = mac80211_hwsim_get_tsf_raw();
mgmt->u.beacon.timestamp = cpu_to_le64(data->abs_bcn_ts +
data->tsf_offset +
- 24 * 8 * 10 / txrate->bitrate);
+ 24 * 8 * 10 / bitrate);

mac80211_hwsim_tx_frame(hw, skb,
rcu_dereference(vif->chanctx_conf)->def.chan);
@@ -3079,6 +3134,8 @@ static int mac80211_hwsim_new_radio(struct genl_info *info,
sizeof(hwsim_channels_2ghz));
memcpy(data->channels_5ghz, hwsim_channels_5ghz,
sizeof(hwsim_channels_5ghz));
+ memcpy(data->channels_s1g, hwsim_channels_s1g,
+ sizeof(hwsim_channels_s1g));
memcpy(data->rates, hwsim_rates, sizeof(hwsim_rates));

for (band = NL80211_BAND_2GHZ; band < NUM_NL80211_BANDS; band++) {
@@ -3121,6 +3178,12 @@ static int mac80211_hwsim_new_radio(struct genl_info *info,
sband->vht_cap.vht_mcs.tx_mcs_map =
sband->vht_cap.vht_mcs.rx_mcs_map;
break;
+ case NL80211_BAND_S1GHZ:
+ memcpy(&sband->s1g_cap, &hwsim_s1g_cap,
+ sizeof(sband->s1g_cap));
+ sband->channels = data->channels_s1g;
+ sband->n_channels = ARRAY_SIZE(hwsim_channels_s1g);
+ break;
default:
continue;
}
@@ -4318,6 +4381,8 @@ static int __init init_mac80211_hwsim(void)
goto out_exit_virtio;
}

+ hwsim_init_s1g_channels(hwsim_channels_s1g);
+
for (i = 0; i < radios; i++) {
struct hwsim_new_radio_params param = { 0 };

--
2.20.1