Add runtime configuration for bitrate mask. This update firmware rate
control to add a boundary on top of table to limit the rate selection
for each peer, so when user set bitrates vht-mcs-5 1:9, which actually
means nss = 1 mcs = 0~9. This only applies to data frames as for other
mgmt, mcast, bcast still use legacy rates as it is.
Note that driver does not support GI configuration.
Example:
iw dev wlan0 set bitrates vht-mcs-5 1:9 he-mcs-5 2:7
iw dev wlan0 set bitrates legacy-5 6 he-mcs-5 2:0-11
Signed-off-by: Ryder Lee <ryder.lee@xxxxxxxxxxxx>
---
changes since v2 - add more comments to describe how it works.
---
.../net/wireless/mediatek/mt76/mt7915/mac.c | 4 +-
.../net/wireless/mediatek/mt76/mt7915/main.c | 64 +++++-
.../net/wireless/mediatek/mt76/mt7915/mcu.c | 185 ++++++++++++++----
.../wireless/mediatek/mt76/mt7915/mt7915.h | 3 +
4 files changed, 213 insertions(+), 43 deletions(-)
diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/mac.c b/drivers/net/wireless/mediatek/mt76/mt7915/mac.c
index 6a4b57509751..67ab268e1aad 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7915/mac.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7915/mac.c
@@ -1775,8 +1775,10 @@ void mt7915_mac_sta_rc_work(struct work_struct *work)
if (changed & (IEEE80211_RC_SUPP_RATES_CHANGED |
IEEE80211_RC_NSS_CHANGED |
- IEEE80211_RC_BW_CHANGED))
+ IEEE80211_RC_BW_CHANGED)) {
+ mt7915_mcu_add_he(dev, vif, sta);
mt7915_mcu_add_rate_ctrl(dev, vif, sta);
+ }
if (changed & IEEE80211_RC_SMPS_CHANGED)
mt7915_mcu_add_smps(dev, vif, sta);
diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/main.c b/drivers/net/wireless/mediatek/mt76/mt7915/main.c
index e5bd687546b6..64f9ebe4424a 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7915/main.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7915/main.c
@@ -172,6 +172,22 @@ static int get_omac_idx(enum nl80211_iftype type, u64 mask)
return -1;
}
+static void mt7915_init_bitrate_mask(struct ieee80211_vif *vif)
+{
+ struct mt7915_vif *mvif = (struct mt7915_vif *)vif->drv_priv;
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(mvif->bitrate_mask.control); i++) {
+ mvif->bitrate_mask.control[i].legacy = GENMASK(31, 0);
+ memset(mvif->bitrate_mask.control[i].ht_mcs, GENMASK(7, 0),
+ sizeof(mvif->bitrate_mask.control[i].ht_mcs));
+ memset(mvif->bitrate_mask.control[i].vht_mcs, GENMASK(15, 0),
+ sizeof(mvif->bitrate_mask.control[i].vht_mcs));
+ memset(mvif->bitrate_mask.control[i].he_mcs, GENMASK(15, 0),
+ sizeof(mvif->bitrate_mask.control[i].he_mcs));
+ }
+}
+
static int mt7915_add_interface(struct ieee80211_hw *hw,
struct ieee80211_vif *vif)
{
@@ -241,6 +257,8 @@ static int mt7915_add_interface(struct ieee80211_hw *hw,
vif->offload_flags = 0;
vif->offload_flags |= IEEE80211_OFFLOAD_ENCAP_4ADDR;
+ mt7915_init_bitrate_mask(vif);
+
out:
mutex_unlock(&dev->mt76.mutex);
@@ -911,17 +929,15 @@ static void mt7915_sta_statistics(struct ieee80211_hw *hw,
sinfo->filled |= BIT_ULL(NL80211_STA_INFO_TX_BITRATE);
}
-static void
-mt7915_sta_rc_update(struct ieee80211_hw *hw,
- struct ieee80211_vif *vif,
- struct ieee80211_sta *sta,
- u32 changed)
+static void mt7915_sta_rc_work(void *data, struct ieee80211_sta *sta)
{
- struct mt7915_dev *dev = mt7915_hw_dev(hw);
struct mt7915_sta *msta = (struct mt7915_sta *)sta->drv_priv;
+ struct mt7915_dev *dev = msta->vif->phy->dev;
+ struct ieee80211_hw *hw = msta->vif->phy->mt76->hw;
+ u32 *changed = data;
spin_lock_bh(&dev->sta_poll_lock);
- msta->stats.changed |= changed;
+ msta->stats.changed |= *changed;
if (list_empty(&msta->rc_list))
list_add_tail(&msta->rc_list, &dev->sta_rc_list);
spin_unlock_bh(&dev->sta_poll_lock);
@@ -929,6 +945,39 @@ mt7915_sta_rc_update(struct ieee80211_hw *hw,
ieee80211_queue_work(hw, &dev->rc_work);
}
+static void mt7915_sta_rc_update(struct ieee80211_hw *hw,
+ struct ieee80211_vif *vif,
+ struct ieee80211_sta *sta,
+ u32 changed)
+{
+ mt7915_sta_rc_work(&changed, sta);
+}
+
+static int
+mt7915_set_bitrate_mask(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
+ const struct cfg80211_bitrate_mask *mask)
+{
+ struct mt7915_vif *mvif = (struct mt7915_vif *)vif->drv_priv;
+ enum nl80211_band band = mvif->phy->mt76->chandef.chan->band;
+ u32 changed;
+
+ if (mask->control[band].gi == NL80211_TXRATE_FORCE_LGI)
+ return -EINVAL;
+
+ changed = IEEE80211_RC_SUPP_RATES_CHANGED;
+ mvif->bitrate_mask = *mask;
+
+ /* Update firmware rate control to add a boundary on top of table
+ * to limit the rate selection for each peer, so when set bitrates
+ * vht-mcs-5 1:9, which actually means nss = 1 mcs = 0~9. This only
+ * applies to data frames as for the other mgmt, mcast, bcast still
+ * use legacy rates as it is.
+ */
+ ieee80211_iterate_stations_atomic(hw, mt7915_sta_rc_work, &changed);
+
+ return 0;
+}
+
static void mt7915_sta_set_4addr(struct ieee80211_hw *hw,
struct ieee80211_vif *vif,
struct ieee80211_sta *sta,
@@ -990,6 +1039,7 @@ const struct ieee80211_ops mt7915_ops = {
.get_survey = mt76_get_survey,
.get_antenna = mt76_get_antenna,
.set_antenna = mt7915_set_antenna,
+ .set_bitrate_mask = mt7915_set_bitrate_mask,
.set_coverage_class = mt7915_set_coverage_class,
.sta_statistics = mt7915_sta_statistics,
.sta_set_4addr = mt7915_sta_set_4addr,
diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/mcu.c b/drivers/net/wireless/mediatek/mt76/mt7915/mcu.c
index 90bca50be099..9cf62e143e30 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7915/mcu.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7915/mcu.c
@@ -209,6 +209,112 @@ mt7915_mcu_get_sta_nss(u16 mcs_map)
return nss - 1;
}
+static void
+mt7915_mcu_set_sta_he_mcs(struct ieee80211_sta *sta, __le16 *he_mcs,
+ const u16 *mask)
+{
+ struct mt7915_sta *msta = (struct mt7915_sta *)sta->drv_priv;
+ struct cfg80211_chan_def *chandef = &msta->vif->phy->mt76->chandef;
+ int nss, max_nss = sta->rx_nss > 3 ? 4 : sta->rx_nss;
+ u16 mcs_map;
+
+ switch (chandef->width) {
+ case NL80211_CHAN_WIDTH_80P80:
+ mcs_map = le16_to_cpu(sta->he_cap.he_mcs_nss_supp.rx_mcs_80p80);
+ break;
+ case NL80211_CHAN_WIDTH_160:
+ mcs_map = le16_to_cpu(sta->he_cap.he_mcs_nss_supp.rx_mcs_160);
+ break;
+ default:
+ mcs_map = le16_to_cpu(sta->he_cap.he_mcs_nss_supp.rx_mcs_80);
+ break;
+ }
+
+ for (nss = 0; nss < max_nss; nss++) {
+ int mcs;
+
+ switch ((mcs_map >> (2 * nss)) & 0x3) {
+ case IEEE80211_HE_MCS_SUPPORT_0_11:
+ mcs = GENMASK(11, 0);
+ break;
+ case IEEE80211_HE_MCS_SUPPORT_0_9:
+ mcs = GENMASK(9, 0);
+ break;
+ case IEEE80211_HE_MCS_SUPPORT_0_7:
+ mcs = GENMASK(7, 0);
+ break;
+ default:
+ mcs = 0;
+ }
+
+ mcs = mcs ? fls(mcs & mask[nss]) - 1 : -1;
+
+ switch (mcs) {
+ case 0 ... 7:
+ mcs = IEEE80211_HE_MCS_SUPPORT_0_7;
+ break;
+ case 8 ... 9:
+ mcs = IEEE80211_HE_MCS_SUPPORT_0_9;
+ break;
+ case 10 ... 11:
+ mcs = IEEE80211_HE_MCS_SUPPORT_0_11;
+ break;
+ default:
+ mcs = IEEE80211_HE_MCS_NOT_SUPPORTED;
+ break;
+ }
+ mcs_map &= ~(0x3 << (nss * 2));
+ mcs_map |= mcs << (nss * 2);
+
+ /* only support 2ss on 160MHz */
+ if (nss > 1 && (sta->bandwidth == IEEE80211_STA_RX_BW_160))
+ break;
+ }
+
+ *he_mcs = cpu_to_le16(mcs_map);
+}
+
+static void
+mt7915_mcu_set_sta_vht_mcs(struct ieee80211_sta *sta, __le16 *vht_mcs,
+ const u16 *mask)
+{
+ u16 mcs_map = le16_to_cpu(sta->vht_cap.vht_mcs.rx_mcs_map);
+ int nss, max_nss = sta->rx_nss > 3 ? 4 : sta->rx_nss;
+ u16 mcs;
+
+ for (nss = 0; nss < max_nss; nss++, mcs_map >>= 2) {
+ switch (mcs_map & 0x3) {
+ case IEEE80211_VHT_MCS_SUPPORT_0_9:
+ mcs = GENMASK(9, 0);
+ break;
+ case IEEE80211_VHT_MCS_SUPPORT_0_8:
+ mcs = GENMASK(8, 0);
+ break;
+ case IEEE80211_VHT_MCS_SUPPORT_0_7:
+ mcs = GENMASK(7, 0);
+ break;
+ default:
+ mcs = 0;
+ }
+
+ vht_mcs[nss] = cpu_to_le16(mcs & mask[nss]);
+
+ /* only support 2ss on 160MHz */
+ if (nss > 1 && (sta->bandwidth == IEEE80211_STA_RX_BW_160))
+ break;
+ }
+}
+
+static void
+mt7915_mcu_set_sta_ht_mcs(struct ieee80211_sta *sta, u8 *ht_mcs,
+ const u8 *mask)
+{
+ int nss, max_nss = sta->rx_nss > 3 ? 4 : sta->rx_nss;
+
+ for (nss = 0; nss < max_nss; nss++)
+ ht_mcs[nss] = sta->ht_cap.mcs.rx_mask[nss] & mask[nss];
+}
+
static int
mt7915_mcu_parse_response(struct mt76_dev *mdev, int cmd,
struct sk_buff *skb, int seq)
@@ -1357,8 +1463,11 @@ mt7915_mcu_sta_basic_tlv(struct sk_buff *skb, struct ieee80211_vif *vif,
static void
mt7915_mcu_sta_he_tlv(struct sk_buff *skb, struct ieee80211_sta *sta)
{
+ struct mt7915_sta *msta = (struct mt7915_sta *)sta->drv_priv;
struct ieee80211_sta_he_cap *he_cap = &sta->he_cap;
struct ieee80211_he_cap_elem *elem = &he_cap->he_cap_elem;
+ enum nl80211_band band = msta->vif->phy->mt76->chandef.chan->band;
+ const u16 *mcs_mask = msta->vif->bitrate_mask.control[band].he_mcs;
struct sta_rec_he *he;
struct tlv *tlv;
u32 cap = 0;
@@ -1449,15 +1558,18 @@ mt7915_mcu_sta_he_tlv(struct sk_buff *skb, struct ieee80211_sta *sta)
case IEEE80211_STA_RX_BW_160:
if (elem->phy_cap_info[0] &
IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G)
- he->max_nss_mcs[CMD_HE_MCS_BW8080] =
- he_cap->he_mcs_nss_supp.rx_mcs_80p80;
+ mt7915_mcu_set_sta_he_mcs(sta,
+ &he->max_nss_mcs[CMD_HE_MCS_BW8080],
+ mcs_mask);
- he->max_nss_mcs[CMD_HE_MCS_BW160] =
- he_cap->he_mcs_nss_supp.rx_mcs_160;
+ mt7915_mcu_set_sta_he_mcs(sta,
+ &he->max_nss_mcs[CMD_HE_MCS_BW160],
+ mcs_mask);
fallthrough;
default:
- he->max_nss_mcs[CMD_HE_MCS_BW80] =
- he_cap->he_mcs_nss_supp.rx_mcs_80;
+ mt7915_mcu_set_sta_he_mcs(sta,
+ &he->max_nss_mcs[CMD_HE_MCS_BW80],
+ mcs_mask);
break;
}
@@ -2102,12 +2214,12 @@ mt7915_mcu_sta_rate_ctrl_tlv(struct sk_buff *skb, struct mt7915_dev *dev,
{
struct mt7915_vif *mvif = (struct mt7915_vif *)vif->drv_priv;
struct cfg80211_chan_def *chandef = &mvif->phy->mt76->chandef;
+ struct cfg80211_bitrate_mask *mask = &mvif->bitrate_mask;
enum nl80211_band band = chandef->chan->band;
struct sta_rec_ra *ra;
struct tlv *tlv;
u32 supp_rate = sta->supp_rates[band];
u32 cap = sta->wme ? STA_CAP_WMM : 0;
- u8 i, nss = sta->rx_nss;
tlv = mt7915_mcu_add_tlv(skb, STA_REC_RA, sizeof(*ra));
ra = (struct sta_rec_ra *)tlv;
@@ -2120,6 +2232,7 @@ mt7915_mcu_sta_rate_ctrl_tlv(struct sk_buff *skb, struct mt7915_dev *dev,
ra->phy.bw = sta->bandwidth;
if (supp_rate) {
+ supp_rate &= mask->control[band].legacy;
ra->rate_len = hweight32(supp_rate);
if (band == NL80211_BAND_2GHZ) {
@@ -2137,10 +2250,8 @@ mt7915_mcu_sta_rate_ctrl_tlv(struct sk_buff *skb, struct mt7915_dev *dev,
}
if (sta->ht_cap.ht_supported) {
- for (i = 0; i < nss; i++)
- ra->ht_mcs[i] = sta->ht_cap.mcs.rx_mask[i];
+ const u8 *mcs_mask = mask->control[band].ht_mcs;
- ra->supp_ht_mcs = *(__le32 *)ra->ht_mcs;
ra->supp_mode |= MODE_HT;
ra->af = sta->ht_cap.ampdu_factor;
ra->ht_gf = !!(sta->ht_cap.cap & IEEE80211_HT_CAP_GRN_FLD);
@@ -2156,13 +2267,16 @@ mt7915_mcu_sta_rate_ctrl_tlv(struct sk_buff *skb, struct mt7915_dev *dev,
cap |= STA_CAP_RX_STBC;
if (sta->ht_cap.cap & IEEE80211_HT_CAP_LDPC_CODING)
cap |= STA_CAP_LDPC;
+
+ mt7915_mcu_set_sta_ht_mcs(sta, ra->ht_mcs, mcs_mask);
+ ra->supp_ht_mcs = *(__le32 *)ra->ht_mcs;
}
if (sta->vht_cap.vht_supported) {
- u16 mcs_map = le16_to_cpu(sta->vht_cap.vht_mcs.rx_mcs_map);
- u16 vht_mcs;
+ const u16 *mcs_mask = mask->control[band].vht_mcs;
u8 af;
+ ra->supp_mode |= MODE_VHT;
af = FIELD_GET(IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK,
sta->vht_cap.cap);
ra->af = max_t(u8, ra->af, af);
@@ -2179,29 +2293,7 @@ mt7915_mcu_sta_rate_ctrl_tlv(struct sk_buff *skb, struct mt7915_dev *dev,
if (sta->vht_cap.cap & IEEE80211_VHT_CAP_RXLDPC)
cap |= STA_CAP_VHT_LDPC;
- ra->supp_mode |= MODE_VHT;
- for (i = 0; i < nss; i++, mcs_map >>= 2) {
- switch (mcs_map & 0x3) {
- case IEEE80211_VHT_MCS_SUPPORT_0_9:
- vht_mcs = GENMASK(9, 0);
- break;
- case IEEE80211_VHT_MCS_SUPPORT_0_8:
- vht_mcs = GENMASK(8, 0);
- break;
- case IEEE80211_VHT_MCS_SUPPORT_0_7:
- vht_mcs = GENMASK(7, 0);
- break;
- default:
- vht_mcs = 0;
- }
-
- ra->supp_vht_mcs[i] = cpu_to_le16(vht_mcs);
-
- /* only support 2ss on 160MHz */
- if (i > 1 && (ra->bw == CMD_CBW_160MHZ ||
- ra->bw == CMD_CBW_8080MHZ))
- break;
- }
+ mt7915_mcu_set_sta_vht_mcs(sta, ra->supp_vht_mcs, mcs_mask);
}
if (sta->he_cap.has_he) {
@@ -2230,6 +2322,29 @@ int mt7915_mcu_add_rate_ctrl(struct mt7915_dev *dev, struct ieee80211_vif *vif,
MCU_EXT_CMD(STA_REC_UPDATE), true);
}
+int mt7915_mcu_add_he(struct mt7915_dev *dev, struct ieee80211_vif *vif,
+ struct ieee80211_sta *sta)
+{
+ struct mt7915_vif *mvif = (struct mt7915_vif *)vif->drv_priv;
+ struct mt7915_sta *msta = (struct mt7915_sta *)sta->drv_priv;
+ struct sk_buff *skb;
+ int len;
+
+ if (!sta->he_cap.has_he)
+ return 0;
+
+ len = sizeof(struct sta_req_hdr) + sizeof(struct sta_rec_he);
+
+ skb = mt7915_mcu_alloc_sta_req(dev, mvif, msta, len);
+ if (IS_ERR(skb))
+ return PTR_ERR(skb);
+
+ mt7915_mcu_sta_he_tlv(skb, sta);
+
+ return mt76_mcu_skb_send_msg(&dev->mt76, skb,
+ MCU_EXT_CMD(STA_REC_UPDATE), true);
+}
+
int mt7915_mcu_add_sta_adv(struct mt7915_dev *dev, struct ieee80211_vif *vif,
struct ieee80211_sta *sta, bool enable)
{
diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/mt7915.h b/drivers/net/wireless/mediatek/mt76/mt7915/mt7915.h
index 43e3d977cdb2..7eca123f657a 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7915/mt7915.h
+++ b/drivers/net/wireless/mediatek/mt76/mt7915/mt7915.h
@@ -103,6 +103,7 @@ struct mt7915_vif {
struct mt7915_phy *phy;
struct ieee80211_tx_queue_params queue_params[IEEE80211_NUM_ACS];
+ struct cfg80211_bitrate_mask bitrate_mask;
};
struct mib_stats {
@@ -332,6 +333,8 @@ int mt7915_mcu_add_obss_spr(struct mt7915_dev *dev, struct ieee80211_vif *vif,
bool enable);
int mt7915_mcu_add_rate_ctrl(struct mt7915_dev *dev, struct ieee80211_vif *vif,
struct ieee80211_sta *sta);
+int mt7915_mcu_add_he(struct mt7915_dev *dev, struct ieee80211_vif *vif,
+ struct ieee80211_sta *sta);
int mt7915_mcu_add_smps(struct mt7915_dev *dev, struct ieee80211_vif *vif,
struct ieee80211_sta *sta);
int mt7915_set_channel(struct mt7915_phy *phy);
--
2.18.0
