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Wed, 13 Jan 2021 05:10:21 -0800 (PST) Received: from localhost ([151.66.42.92]) by smtp.gmail.com with ESMTPSA id b132sm3071303wmh.21.2021.01.13.05.10.20 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 13 Jan 2021 05:10:21 -0800 (PST) Date: Wed, 13 Jan 2021 14:10:18 +0100 From: Lorenzo Bianconi To: Ryder Lee Subject: Re: [PATCH 2/2] mt76: mt7915: add implicit Tx beamforming support Message-ID: <20210113131018.GB5528@lore-desk> References: <287bbdb0193bd74069219b97199ba4ec72127bd8.1610539467.git.ryder.lee@mediatek.com> <8663392490d6b0552aaf0b5b7a8eb36ff38c8bba.1610539467.git.ryder.lee@mediatek.com> MIME-Version: 1.0 In-Reply-To: <8663392490d6b0552aaf0b5b7a8eb36ff38c8bba.1610539467.git.ryder.lee@mediatek.com> Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=lorenzo.bianconi@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210113_081028_181965_7022F82B X-CRM114-Status: GOOD ( 18.87 ) X-BeenThere: linux-mediatek@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-mediatek@lists.infradead.org, Shayne Chen , linux-wireless@vger.kernel.org, Felix Fietkau Content-Type: multipart/mixed; boundary="===============3455997891311231930==" Sender: "Linux-mediatek" Errors-To: linux-mediatek-bounces+linux-mediatek=archiver.kernel.org@lists.infradead.org --===============3455997891311231930== Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="aVD9QWMuhilNxW9f" Content-Disposition: inline --aVD9QWMuhilNxW9f Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable > Add ht/vht implicit Tx beamforming support and enable it via debugfs. >=20 > Tested-by: Shayne Chen > Signed-off-by: Ryder Lee > --- > .../wireless/mediatek/mt76/mt7915/debugfs.c | 28 +++++ > .../net/wireless/mediatek/mt76/mt7915/init.c | 8 +- > .../net/wireless/mediatek/mt76/mt7915/mcu.c | 104 ++++++++++-------- > .../wireless/mediatek/mt76/mt7915/mt7915.h | 1 + > 4 files changed, 89 insertions(+), 52 deletions(-) >=20 > diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/debugfs.c b/driver= s/net/wireless/mediatek/mt76/mt7915/debugfs.c > index 7d810fbf2862..340d489993bb 100644 > --- a/drivers/net/wireless/mediatek/mt76/mt7915/debugfs.c > +++ b/drivers/net/wireless/mediatek/mt76/mt7915/debugfs.c > @@ -6,6 +6,32 @@ > =20 > /** global debugfs **/ > =20 > +static int > +mt7915_implicit_txbf_set(void *data, u64 val) > +{ > +=09struct mt7915_dev *dev =3D data; > + > +=09if (test_bit(MT76_STATE_RUNNING, &dev->mphy.state)) > +=09=09return 0; Maybe return -EBUSY here? > + > +=09dev->ibf =3D !!val; > + > +=09return mt7915_mcu_set_txbf_type(dev); > +} > + > +static int > +mt7915_implicit_txbf_get(void *data, u64 *val) > +{ > +=09struct mt7915_dev *dev =3D data; > + > +=09*val =3D dev->ibf; > + > +=09return 0; > +} > + > +DEFINE_DEBUGFS_ATTRIBUTE(fops_implicit_txbf, mt7915_implicit_txbf_get, > +=09=09=09 mt7915_implicit_txbf_set, "%lld\n"); > + > /* test knob of system layer 1/2 error recovery */ > static int mt7915_ser_trigger_set(void *data, u64 val) > { > @@ -355,6 +381,8 @@ int mt7915_init_debugfs(struct mt7915_dev *dev) > =09=09=09=09 mt7915_queues_acq); > =09debugfs_create_file("tx_stats", 0400, dir, dev, &fops_tx_stats); > =09debugfs_create_file("fw_debug", 0600, dir, dev, &fops_fw_debug); > +=09debugfs_create_file("implicit_txbf", 0600, dir, dev, > +=09=09=09 &fops_implicit_txbf); > =09debugfs_create_u32("dfs_hw_pattern", 0400, dir, &dev->hw_pattern); > =09/* test knobs */ > =09debugfs_create_file("radar_trigger", 0200, dir, dev, > diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/init.c b/drivers/n= et/wireless/mediatek/mt76/mt7915/init.c > index 255ccd7e3d27..cb501c5dc1cc 100644 > --- a/drivers/net/wireless/mediatek/mt76/mt7915/init.c > +++ b/drivers/net/wireless/mediatek/mt76/mt7915/init.c > @@ -169,18 +169,12 @@ static int mt7915_txbf_init(struct mt7915_dev *dev) > { > =09int ret; > =20 > -=09/* > -=09 * TODO: DBDC & check whether iBF phase calibration data has > -=09 * been stored in eeprom offset 0x651~0x7b8, then write down > -=09 * 0x1111 into 0x651 and 0x651 to trigger iBF. > -=09 */ > - > =09/* trigger sounding packets */ > =09ret =3D mt7915_mcu_set_txbf_sounding(dev); > =09if (ret) > =09=09return ret; > =20 > -=09/* enable iBF & eBF */ > +=09/* enable eBF */ > =09return mt7915_mcu_set_txbf_type(dev); > } > =20 > diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/mcu.c b/drivers/ne= t/wireless/mediatek/mt76/mt7915/mcu.c > index f38bc421ea8e..2ac780bc2696 100644 > --- a/drivers/net/wireless/mediatek/mt76/mt7915/mcu.c > +++ b/drivers/net/wireless/mediatek/mt76/mt7915/mcu.c > @@ -1736,13 +1736,14 @@ mt7915_mcu_sta_sounding_rate(struct sta_rec_bf *b= f) > } > =20 > static void > -mt7915_mcu_sta_bfer_ht(struct ieee80211_sta *sta, struct sta_rec_bf *bf) > +mt7915_mcu_sta_bfer_ht(struct ieee80211_sta *sta, struct mt7915_phy *phy= , > +=09=09 struct sta_rec_bf *bf) > { > =09struct ieee80211_mcs_info *mcs =3D &sta->ht_cap.mcs; > =09u8 n =3D 0; > =20 > =09bf->tx_mode =3D MT_PHY_TYPE_HT; > -=09bf->bf_cap |=3D MT_IBF; > +=09bf->bf_cap =3D MT_IBF; > =20 > =09if (mcs->tx_params & IEEE80211_HT_MCS_TX_RX_DIFF && > =09 (mcs->tx_params & IEEE80211_HT_MCS_TX_DEFINED)) > @@ -1755,8 +1756,9 @@ mt7915_mcu_sta_bfer_ht(struct ieee80211_sta *sta, s= truct sta_rec_bf *bf) > =09else if (mcs->rx_mask[1]) > =09=09n =3D 1; > =20 > +=09bf->nr =3D hweight8(phy->chainmask) - 1; > =09bf->nc =3D min_t(u8, bf->nr, n); > -=09bf->ibf_ncol =3D bf->nc; > +=09bf->ibf_ncol =3D n; > =20 > =09if (sta->bandwidth <=3D IEEE80211_STA_RX_BW_40 && !bf->nc) > =09=09bf->ibf_timeout =3D 0x48; > @@ -1764,34 +1766,46 @@ mt7915_mcu_sta_bfer_ht(struct ieee80211_sta *sta,= struct sta_rec_bf *bf) > =20 > static void > mt7915_mcu_sta_bfer_vht(struct ieee80211_sta *sta, struct mt7915_phy *ph= y, > -=09=09=09struct sta_rec_bf *bf) > +=09=09=09struct sta_rec_bf *bf, bool explicit) > { > =09struct ieee80211_sta_vht_cap *pc =3D &sta->vht_cap; > =09struct ieee80211_sta_vht_cap *vc =3D &phy->mt76->sband_5g.sband.vht_c= ap; > -=09u8 bfee_nr, bfer_nr, n, tx_ant =3D hweight8(phy->chainmask) - 1; > -=09u16 mcs_map; > +=09u16 mcs_map =3D le16_to_cpu(pc->vht_mcs.rx_mcs_map); > +=09u8 nss_mcs =3D mt7915_mcu_get_sta_nss(mcs_map); > +=09u8 tx_ant =3D hweight8(phy->chainmask) - 1; > =20 > =09bf->tx_mode =3D MT_PHY_TYPE_VHT; > -=09bf->bf_cap |=3D MT_EBF; > =20 > -=09mt7915_mcu_sta_sounding_rate(bf); > +=09if (explicit) { > +=09=09u8 n, bfee_nr, bfer_nr; > =20 > -=09bfee_nr =3D FIELD_GET(IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK, > -=09=09=09 pc->cap); > -=09bfer_nr =3D FIELD_GET(IEEE80211_VHT_CAP_SOUNDING_DIMENSIONS_MASK, > -=09=09=09 vc->cap); > -=09mcs_map =3D le16_to_cpu(pc->vht_mcs.rx_mcs_map); > +=09=09bf->bf_cap =3D MT_EBF; > =20 > -=09n =3D min_t(u8, bfer_nr, bfee_nr); > -=09bf->nr =3D min_t(u8, n, tx_ant); > -=09n =3D mt7915_mcu_get_sta_nss(mcs_map); > +=09=09mt7915_mcu_sta_sounding_rate(bf); > =20 > -=09bf->nc =3D min_t(u8, n, bf->nr); > -=09bf->ibf_ncol =3D bf->nc; > +=09=09bfee_nr =3D FIELD_GET(IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK, > +=09=09=09=09 pc->cap); > +=09=09bfer_nr =3D FIELD_GET(IEEE80211_VHT_CAP_SOUNDING_DIMENSIONS_MASK, > +=09=09=09=09 vc->cap); > +=09=09n =3D min_t(u8, bfer_nr, bfee_nr); > +=09=09bf->nr =3D min_t(u8, n, tx_ant); > +=09=09bf->nc =3D min_t(u8, nss_mcs, bf->nr); > +=09=09bf->ibf_ncol =3D bf->nc; > + > +=09=09if (sta->bandwidth =3D=3D IEEE80211_STA_RX_BW_160) > +=09=09=09bf->nr =3D 1; > +=09} else { > +=09=09bf->bf_cap =3D MT_IBF; > +=09=09bf->nr =3D tx_ant; > +=09=09bf->nc =3D min_t(u8, nss_mcs, bf->nr); > +=09=09bf->ibf_ncol =3D nss_mcs; > + > +=09=09if (sta->bandwidth <=3D IEEE80211_STA_RX_BW_40 && !bf->nc) > +=09=09=09bf->ibf_timeout =3D 0x48; > =20 > -=09/* force nr from 4 to 2 */ > -=09if (sta->bandwidth =3D=3D IEEE80211_STA_RX_BW_160) > -=09=09bf->nr =3D 1; > +=09=09if (sta->bandwidth =3D=3D IEEE80211_STA_RX_BW_160) > +=09=09=09bf->ibf_nrow =3D 1; > +=09} > } > =20 > static void > @@ -1800,16 +1814,14 @@ mt7915_mcu_sta_bfer_he(struct ieee80211_sta *sta,= struct ieee80211_vif *vif, > { > =09struct ieee80211_sta_he_cap *pc =3D &sta->he_cap; > =09struct ieee80211_he_cap_elem *pe =3D &pc->he_cap_elem; > -=09const struct ieee80211_he_cap_elem *ve; > -=09const struct ieee80211_sta_he_cap *vc; > -=09u8 bfee_nr, bfer_nr, nss_mcs; > -=09u16 mcs_map; > - > -=09vc =3D mt7915_get_he_phy_cap(phy, vif); > -=09ve =3D &vc->he_cap_elem; > +=09const struct ieee80211_sta_he_cap *vc =3D mt7915_get_he_phy_cap(phy, = vif); > +=09const struct ieee80211_he_cap_elem *ve =3D &vc->he_cap_elem; > +=09u16 mcs_map =3D le16_to_cpu(pc->he_mcs_nss_supp.rx_mcs_80); > +=09u8 nss_mcs =3D mt7915_mcu_get_sta_nss(mcs_map); > +=09u8 bfee_nr, bfer_nr; > =20 > =09bf->tx_mode =3D MT_PHY_TYPE_HE_SU; > -=09bf->bf_cap |=3D MT_EBF; > +=09bf->bf_cap =3D MT_EBF; > =20 > =09mt7915_mcu_sta_sounding_rate(bf); > =20 > @@ -1821,10 +1833,6 @@ mt7915_mcu_sta_bfer_he(struct ieee80211_sta *sta, = struct ieee80211_vif *vif, > =09=09=09 ve->phy_cap_info[5]); > =09bfee_nr =3D HE_PHY(CAP4_BEAMFORMEE_MAX_STS_UNDER_80MHZ_MASK, > =09=09=09 pe->phy_cap_info[4]); > - > -=09mcs_map =3D le16_to_cpu(pc->he_mcs_nss_supp.tx_mcs_80); > -=09nss_mcs =3D mt7915_mcu_get_sta_nss(mcs_map); > - > =09bf->nr =3D min_t(u8, bfer_nr, bfee_nr); > =09bf->nc =3D min_t(u8, nss_mcs, bf->nr); > =09bf->ibf_ncol =3D bf->nc; > @@ -1863,7 +1871,7 @@ mt7915_mcu_sta_bfer_he(struct ieee80211_sta *sta, s= truct ieee80211_vif *vif, > static void > mt7915_mcu_sta_bfer_tlv(struct sk_buff *skb, struct ieee80211_sta *sta, > =09=09=09struct ieee80211_vif *vif, struct mt7915_phy *phy, > -=09=09=09bool enable) > +=09=09=09bool enable, bool explicit) > { > =09struct sta_rec_bf *bf; > =09struct tlv *tlv; > @@ -1885,19 +1893,25 @@ mt7915_mcu_sta_bfer_tlv(struct sk_buff *skb, stru= ct ieee80211_sta *sta, > =09=09return; > =09} > =20 > -=09bf->bw =3D sta->bandwidth; > -=09bf->ibf_dbw =3D sta->bandwidth; > -=09bf->ibf_nrow =3D tx_ant; > -=09bf->ibf_timeout =3D 0x18; > - > +=09/* he: eBF only, in accordance with spec > +=09 * vht: support eBF and iBF > +=09 * ht: iBF only, since mac80211 lacks of eBF support > +=09 */ > =09if (sta->he_cap.has_he) > =09=09mt7915_mcu_sta_bfer_he(sta, vif, phy, bf); > =09else if (sta->vht_cap.vht_supported) > -=09=09mt7915_mcu_sta_bfer_vht(sta, phy, bf); > +=09=09mt7915_mcu_sta_bfer_vht(sta, phy, bf, explicit); > =09else if (sta->ht_cap.ht_supported) > -=09=09mt7915_mcu_sta_bfer_ht(sta, bf); > +=09=09mt7915_mcu_sta_bfer_ht(sta, phy, bf); > +=09else > +=09=09return; > + > +=09bf->bw =3D sta->bandwidth; > +=09bf->ibf_dbw =3D sta->bandwidth; > +=09bf->ibf_nrow =3D tx_ant; > +=09bf->ibf_timeout =3D 0x18; > =20 > -=09if (bf->bf_cap & MT_EBF && bf->nr !=3D tx_ant) > +=09if (explicit && bf->nr !=3D tx_ant) > =09=09bf->mem_20m =3D matrix[tx_ant][bf->nc]; > =09else > =09=09bf->mem_20m =3D matrix[bf->nr][bf->nc]; > @@ -2002,14 +2016,14 @@ mt7915_mcu_add_txbf(struct mt7915_dev *dev, struc= t ieee80211_vif *vif, > =09/* must keep each tag independent */ > =20 > =09/* starec bf */ > -=09if (ebf) { > +=09if (ebf || dev->ibf) { > =09=09len =3D sizeof(struct sta_req_hdr) + sizeof(struct sta_rec_bf); > =20 > =09=09skb =3D mt7915_mcu_alloc_sta_req(dev, mvif, msta, len); > =09=09if (IS_ERR(skb)) > =09=09=09return PTR_ERR(skb); > =20 > -=09=09mt7915_mcu_sta_bfer_tlv(skb, sta, vif, phy, enable); > +=09=09mt7915_mcu_sta_bfer_tlv(skb, sta, vif, phy, enable, ebf); > =20 > =09=09r =3D mt76_mcu_skb_send_msg(&dev->mt76, skb, > =09=09=09=09=09 MCU_EXT_CMD_STA_REC_UPDATE, true); > @@ -3442,7 +3456,7 @@ int mt7915_mcu_set_txbf_type(struct mt7915_dev *dev= ) > =09} __packed req =3D { > =09=09.action =3D MT_BF_TYPE_UPDATE, > =09=09.ebf =3D true, > -=09=09.ibf =3D false, > +=09=09.ibf =3D dev->ibf, > =09}; > =20 > =09return mt76_mcu_send_msg(&dev->mt76, MCU_EXT_CMD_TXBF_ACTION, &req, > diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/mt7915.h b/drivers= /net/wireless/mediatek/mt76/mt7915/mt7915.h > index df7ac2cf052f..63ad1f8199f2 100644 > --- a/drivers/net/wireless/mediatek/mt76/mt7915/mt7915.h > +++ b/drivers/net/wireless/mediatek/mt76/mt7915/mt7915.h > @@ -191,6 +191,7 @@ struct mt7915_dev { > =09bool dbdc_support; > =09bool flash_mode; > =09bool fw_debug; > +=09bool ibf; > }; > =20 > enum { > --=20 > 2.18.0 >=20 --aVD9QWMuhilNxW9f Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iHUEABYIAB0WIQTquNwa3Txd3rGGn7Y6cBh0uS2trAUCX/7xNwAKCRA6cBh0uS2t rA/uAQD+SjXzj8iT92THsyBpqkiTAzPIr4A3emVeWZWk2UGz2wD/R3C+j400jXhg gNeJGNdbeXych02kczZ1zC3O7NIm5As= =23n3 -----END PGP SIGNATURE----- --aVD9QWMuhilNxW9f-- --===============3455997891311231930== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ Linux-mediatek mailing list Linux-mediatek@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-mediatek --===============3455997891311231930==--