[PATCH v5 2/8] ath11k: add support for 6GHz radio in driver

Pradeep Kumar Chitrapu
2020-06-03T00:17:49Z

This patch adds 6GHz band support and mac80211 registration for
the 6G phy radio.

Signed-off-by: Pradeep Kumar Chitrapu <pradeepc@codeaurora.org>
---
v5:
- do not add ht/vht caps in 6ghz band.
v3:
- update 6GHz starting frequency as defined in IEEE P802.11ax/D6.1

drivers/net/wireless/ath/ath11k/core.h | 6 +-
drivers/net/wireless/ath/ath11k/mac.c | 93 +++++++++++++++++++++-----
drivers/net/wireless/ath/ath11k/wmi.c | 16 ++++-
3 files changed, 94 insertions(+), 21 deletions(-)

diff --git a/drivers/net/wireless/ath/ath11k/core.h b/drivers/net/wireless/ath/ath11k/core.h
index 7e51445cfa20..602a7fd765df 100644
--- a/drivers/net/wireless/ath/ath11k/core.h
+++ b/drivers/net/wireless/ath/ath11k/core.h
@@ -353,7 +353,10 @@ struct ath11k_sta {
#endif
};

-#define ATH11K_NUM_CHANS 41
+#define ATH11K_MIN_5G_FREQ 4150
+#define ATH11K_MIN_6G_FREQ 5945
+#define ATH11K_MAX_6G_FREQ 7115
+#define ATH11K_NUM_CHANS 100
#define ATH11K_MAX_5G_CHAN 173

enum ath11k_state {
@@ -431,6 +434,7 @@ struct ath11k {
u32 vht_cap_info;
struct ath11k_he ar_he;
enum ath11k_state state;
+ bool supports_6ghz;
struct {
struct completion started;
struct completion completed;
diff --git a/drivers/net/wireless/ath/ath11k/mac.c b/drivers/net/wireless/ath/ath11k/mac.c
index 45ffe9543c63..6e4096f6bda6 100644
--- a/drivers/net/wireless/ath/ath11k/mac.c
+++ b/drivers/net/wireless/ath/ath11k/mac.c
@@ -205,6 +205,17 @@ ath11k_phymodes[NUM_NL80211_BANDS][ATH11K_CHAN_WIDTH_NUM] = {
[NL80211_CHAN_WIDTH_160] = MODE_11AX_HE160,
[NL80211_CHAN_WIDTH_80P80] = MODE_11AX_HE80_80,
},
+ [NL80211_BAND_6GHZ] = {
+ [NL80211_CHAN_WIDTH_5] = MODE_UNKNOWN,
+ [NL80211_CHAN_WIDTH_10] = MODE_UNKNOWN,
+ [NL80211_CHAN_WIDTH_20_NOHT] = MODE_11AX_HE20,
+ [NL80211_CHAN_WIDTH_20] = MODE_11AX_HE20,
+ [NL80211_CHAN_WIDTH_40] = MODE_11AX_HE40,
+ [NL80211_CHAN_WIDTH_80] = MODE_11AX_HE80,
+ [NL80211_CHAN_WIDTH_160] = MODE_11AX_HE160,
+ [NL80211_CHAN_WIDTH_80P80] = MODE_11AX_HE80_80,
+ },
+
};

const struct htt_rx_ring_tlv_filter ath11k_mac_mon_status_filter_default = {
@@ -1560,6 +1571,7 @@ static void ath11k_peer_assoc_h_phymode(struct ath11k *ar,
}
break;
case NL80211_BAND_5GHZ:
+ case NL80211_BAND_6GHZ:
/* Check HE first */
if (sta->he_cap.has_he) {
phymode = ath11k_mac_get_phymode_he(ar, sta);
@@ -3482,7 +3494,7 @@ static void ath11k_mac_setup_ht_vht_cap(struct ath11k *ar,
rate_cap_rx_chainmask);
}

- if (cap->supported_bands & WMI_HOST_WLAN_5G_CAP) {
+ if (cap->supported_bands & WMI_HOST_WLAN_5G_CAP && !ar->supports_6ghz) {
band = &ar->mac.sbands[NL80211_BAND_5GHZ];
ht_cap = cap->band[NL80211_BAND_5GHZ].ht_cap_info;
if (ht_cap_info)
@@ -3748,6 +3760,17 @@ static void ath11k_mac_setup_he_cap(struct ath11k *ar,
band->iftype_data = ar->mac.iftype[NL80211_BAND_5GHZ];
band->n_iftype_data = count;
}
+
+ if (cap->supported_bands & WMI_HOST_WLAN_5G_CAP &&
+ ar->supports_6ghz) {
+ count = ath11k_mac_copy_he_cap(ar, cap,
+ ar->mac.iftype[NL80211_BAND_6GHZ],
+ NL80211_BAND_6GHZ);
+ band = &ar->mac.sbands[NL80211_BAND_6GHZ];
+ band->iftype_data = ar->mac.iftype[NL80211_BAND_6GHZ];
+ band->n_iftype_data = count;
+ }
+
}

static int __ath11k_set_antenna(struct ath11k *ar, u32 tx_ant, u32 rx_ant)
@@ -4190,6 +4213,12 @@ ath11k_mac_setup_vdev_create_params(struct ath11k_vif *arvif,
params->chains[NL80211_BAND_5GHZ].tx = ar->num_tx_chains;
params->chains[NL80211_BAND_5GHZ].rx = ar->num_rx_chains;
}
+ if (pdev->cap.supported_bands & WMI_HOST_WLAN_5G_CAP &&
+ ar->supports_6ghz) {
+ params->chains[NL80211_BAND_6GHZ].tx = ar->num_tx_chains;
+ params->chains[NL80211_BAND_6GHZ].rx = ar->num_rx_chains;
+ }
+
}

static u32
@@ -5322,7 +5351,7 @@ ath11k_mac_get_single_legacy_rate(struct ath11k *ar,

rate_idx = ffs(mask->control[band].legacy) - 1;

- if (band == NL80211_BAND_5GHZ)
+ if (band == NL80211_BAND_5GHZ || band == NL80211_BAND_6GHZ)
rate_idx += ATH11K_MAC_FIRST_OFDM_RATE_IDX;

hw_rate = ath11k_legacy_rates[rate_idx].hw_value;
@@ -5788,7 +5817,8 @@ static int ath11k_mac_setup_channels_rates(struct ath11k *ar,
void *channels;

BUILD_BUG_ON((ARRAY_SIZE(ath11k_2ghz_channels) +
- ARRAY_SIZE(ath11k_5ghz_channels)) !=
+ ARRAY_SIZE(ath11k_5ghz_channels) +
+ ARRAY_SIZE(ath11k_6ghz_channels)) !=
ATH11K_NUM_CHANS);

reg_cap = &ar->ab->hal_reg_cap[ar->pdev_idx];
@@ -5801,6 +5831,7 @@ static int ath11k_mac_setup_channels_rates(struct ath11k *ar,
return -ENOMEM;

band = &ar->mac.sbands[NL80211_BAND_2GHZ];
+ band->band = NL80211_BAND_2GHZ;
band->n_channels = ARRAY_SIZE(ath11k_2ghz_channels);
band->channels = channels;
band->n_bitrates = ath11k_g_rates_size;
@@ -5812,23 +5843,48 @@ static int ath11k_mac_setup_channels_rates(struct ath11k *ar,
}

if (supported_bands & WMI_HOST_WLAN_5G_CAP) {
- channels = kmemdup(ath11k_5ghz_channels,
- sizeof(ath11k_5ghz_channels),
- GFP_KERNEL);
- if (!channels) {
- kfree(ar->mac.sbands[NL80211_BAND_2GHZ].channels);
- return -ENOMEM;
+ if (reg_cap->high_5ghz_chan >= ATH11K_MAX_6G_FREQ) {
+ channels = kmemdup(ath11k_6ghz_channels,
+ sizeof(ath11k_6ghz_channels), GFP_KERNEL);
+ if (!channels) {
+ kfree(ar->mac.sbands[NL80211_BAND_2GHZ].channels);
+ return -ENOMEM;
+ }
+
+ ar->supports_6ghz = true;
+ band = &ar->mac.sbands[NL80211_BAND_6GHZ];
+ band->band = NL80211_BAND_6GHZ;
+ band->n_channels = ARRAY_SIZE(ath11k_6ghz_channels);
+ band->channels = channels;
+ band->n_bitrates = ath11k_a_rates_size;
+ band->bitrates = ath11k_a_rates;
+ ar->hw->wiphy->bands[NL80211_BAND_6GHZ] = band;
+ ath11k_mac_update_ch_list(ar, band,
+ reg_cap->low_5ghz_chan,
+ reg_cap->high_5ghz_chan);
}

- band = &ar->mac.sbands[NL80211_BAND_5GHZ];
- band->n_channels = ARRAY_SIZE(ath11k_5ghz_channels);
- band->channels = channels;
- band->n_bitrates = ath11k_a_rates_size;
- band->bitrates = ath11k_a_rates;
- ar->hw->wiphy->bands[NL80211_BAND_5GHZ] = band;
- ath11k_mac_update_ch_list(ar, band,
- reg_cap->low_5ghz_chan,
- reg_cap->high_5ghz_chan);
+ if (reg_cap->low_5ghz_chan < ATH11K_MIN_6G_FREQ) {
+ channels = kmemdup(ath11k_5ghz_channels,
+ sizeof(ath11k_5ghz_channels),
+ GFP_KERNEL);
+ if (!channels) {
+ kfree(ar->mac.sbands[NL80211_BAND_2GHZ].channels);
+ kfree(ar->mac.sbands[NL80211_BAND_6GHZ].channels);
+ return -ENOMEM;
+ }
+
+ band = &ar->mac.sbands[NL80211_BAND_5GHZ];
+ band->band = NL80211_BAND_5GHZ;
+ band->n_channels = ARRAY_SIZE(ath11k_5ghz_channels);
+ band->channels = channels;
+ band->n_bitrates = ath11k_a_rates_size;
+ band->bitrates = ath11k_a_rates;
+ ar->hw->wiphy->bands[NL80211_BAND_5GHZ] = band;
+ ath11k_mac_update_ch_list(ar, band,
+ reg_cap->low_5ghz_chan,
+ reg_cap->high_5ghz_chan);
+ }
}

return 0;
@@ -5882,6 +5938,7 @@ static void __ath11k_mac_unregister(struct ath11k *ar)

kfree(ar->mac.sbands[NL80211_BAND_2GHZ].channels);
kfree(ar->mac.sbands[NL80211_BAND_5GHZ].channels);
+ kfree(ar->mac.sbands[NL80211_BAND_6GHZ].channels);

SET_IEEE80211_DEV(ar->hw, NULL);
}
diff --git a/drivers/net/wireless/ath/ath11k/wmi.c b/drivers/net/wireless/ath/ath11k/wmi.c
index c2a972377687..291fb274134f 100644
--- a/drivers/net/wireless/ath/ath11k/wmi.c
+++ b/drivers/net/wireless/ath/ath11k/wmi.c
@@ -368,6 +368,17 @@ ath11k_pull_mac_phy_cap_svc_ready_ext(struct ath11k_pdev_wmi *wmi_handle,
memcpy(&cap_band->he_ppet, &mac_phy_caps->he_ppet5g,
sizeof(struct ath11k_ppe_threshold));

+ cap_band = &pdev_cap->band[NL80211_BAND_6GHZ];
+ cap_band->max_bw_supported = mac_phy_caps->max_bw_supported_5g;
+ cap_band->ht_cap_info = mac_phy_caps->ht_cap_info_5g;
+ cap_band->he_cap_info[0] = mac_phy_caps->he_cap_info_5g;
+ cap_band->he_cap_info[1] = mac_phy_caps->he_cap_info_5g_ext;
+ cap_band->he_mcs = mac_phy_caps->he_supp_mcs_5g;
+ memcpy(cap_band->he_cap_phy_info, &mac_phy_caps->he_cap_phy_info_5g,
+ sizeof(u32) * PSOC_HOST_MAX_PHY_SIZE);
+ memcpy(&cap_band->he_ppet, &mac_phy_caps->he_ppet5g,
+ sizeof(struct ath11k_ppe_threshold));
+
return 0;
}

@@ -5206,9 +5217,10 @@ static void ath11k_mgmt_rx_event(struct ath11k_base *ab, struct sk_buff *skb)
goto exit;
}

- if (rx_ev.phy_mode == MODE_11B && status->band == NL80211_BAND_5GHZ)
+ if (rx_ev.phy_mode == MODE_11B &&
+ (status->band == NL80211_BAND_5GHZ || status->band == NL80211_BAND_6GHZ))
ath11k_dbg(ab, ATH11K_DBG_WMI,
- "wmi mgmt rx 11b (CCK) on 5GHz\n");
+ "wmi mgmt rx 11b (CCK) on 5/6GHz, band = %d\n", status->band);

sband = &ar->mac.sbands[status->band];

--
2.17.1