Re: [PATCH v4 1/8] mt76 - mt7915: Add ethtool stats support.

[Lorenzo Bianconi <lorenzo@kernel.org>]

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> From: Ben Greear <greearb@candelatech.com>
> 
> This exposes some tx-path stats to the ethtool API, so that
> ethtool -S wlanX provides some more useful info.
> 
> Signed-off-by: Ben Greear <greearb@candelatech.com>
> ---
>  
> v4: move ethtool code to main.c
>   Re-work the 2/8 patch per review.
>   Did not try to refactor the station walk per comments on 3/8, I saw
>   no clean way to do that.
> 
> .../net/wireless/mediatek/mt76/mt7915/main.c  | 136 ++++++++++++++++++
>  1 file changed, 136 insertions(+)
> 
> diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/main.c b/drivers/net/wireless/mediatek/mt76/mt7915/main.c
> index 48b5e2051bad..d0288fe2abdf 100644
> --- a/drivers/net/wireless/mediatek/mt76/mt7915/main.c
> +++ b/drivers/net/wireless/mediatek/mt76/mt7915/main.c
> @@ -1028,6 +1028,139 @@ static void mt7915_sta_set_decap_offload(struct ieee80211_hw *hw,
>  	mt7915_mcu_sta_update_hdr_trans(dev, vif, sta);
>  }
>  
> +static const char mt7915_gstrings_stats[][ETH_GSTRING_LEN] = {
> +	"tx_ampdu_len:0-1",
> +	"tx_ampdu_len:2-10",
> +	"tx_ampdu_len:11-19",
> +	"tx_ampdu_len:20-28",
> +	"tx_ampdu_len:29-37",
> +	"tx_ampdu_len:38-46",
> +	"tx_ampdu_len:47-55",
> +	"tx_ampdu_len:56-79",
> +	"tx_ampdu_len:80-103",
> +	"tx_ampdu_len:104-127",
> +	"tx_ampdu_len:128-151",
> +	"tx_ampdu_len:152-175",
> +	"tx_ampdu_len:176-199",
> +	"tx_ampdu_len:200-223",
> +	"tx_ampdu_len:224-247",
> +	"ba_miss_count",
> +	"tx_beamformer_ppdu_iBF",
> +	"tx_beamformer_ppdu_eBF",
> +	"tx_beamformer_rx_feedback_all",
> +	"tx_beamformer_rx_feedback_he",
> +	"tx_beamformer_rx_feedback_vht",
> +	"tx_beamformer_rx_feedback_ht",
> +	"tx_beamformer_rx_feedback_bw", /* zero based idx: 20, 40, 80, 160 */
> +	"tx_beamformer_rx_feedback_nc",
> +	"tx_beamformer_rx_feedback_nr",
> +	"tx_beamformee_ok_feedback_pkts",
> +	"tx_beamformee_feedback_trig",
> +	"tx_mu_beamforming",
> +	"tx_mu_mpdu",
> +	"tx_mu_successful_mpdu",
> +	"tx_su_successful_mpdu",
> +	"tx_msdu_pack_1",
> +	"tx_msdu_pack_2",
> +	"tx_msdu_pack_3",
> +	"tx_msdu_pack_4",
> +	"tx_msdu_pack_5",
> +	"tx_msdu_pack_6",
> +	"tx_msdu_pack_7",
> +	"tx_msdu_pack_8",
> +};
> +
> +#define MT7915_SSTATS_LEN ARRAY_SIZE(mt7915_gstrings_stats)
> +
> +/* Ethtool related API */
> +void mt7915_get_et_strings(struct ieee80211_hw *hw,
> +			   struct ieee80211_vif *vif,
> +			   u32 sset, u8 *data)

please make them static

Regards,
Lorenzo

> +{
> +	if (sset == ETH_SS_STATS)
> +		memcpy(data, *mt7915_gstrings_stats,
> +		       sizeof(mt7915_gstrings_stats));
> +}
> +
> +int mt7915_get_et_sset_count(struct ieee80211_hw *hw,
> +			     struct ieee80211_vif *vif, int sset)
> +{
> +	if (sset == ETH_SS_STATS)
> +		return MT7915_SSTATS_LEN;
> +
> +	return 0;
> +}
> +
> +void mt7915_get_et_stats(struct ieee80211_hw *hw,
> +			 struct ieee80211_vif *vif,
> +			 struct ethtool_stats *stats, u64 *data)
> +{
> +	struct mt7915_dev *dev = mt7915_hw_dev(hw);
> +	struct mt7915_phy *phy = mt7915_hw_phy(hw);
> +
> +	/* TODO:  These are mostly dev-wide stats at this point.
> +	 *  Get some per-vif stats?
> +	 */
> +
> +	/* See mt7915_ampdu_stat_read_phy, etc */
> +	bool ext_phy = phy != &dev->phy;
> +	int i, n, cnt;
> +	int ei = 0;
> +
> +	if (!phy)
> +		return;
> +
> +	/* Tx ampdu stat */
> +	n = ext_phy ? ARRAY_SIZE(dev->mt76.aggr_stats) / 2 : 0;
> +	for (i = 0; i < 15 /*ARRAY_SIZE(bound)*/; i++)
> +		data[ei++] = dev->mt76.aggr_stats[i + n];
> +
> +	data[ei++] = phy->mib.ba_miss_cnt;
> +
> +	/* Tx Beamformer monitor */
> +	cnt = mt76_rr(dev, MT_ETBF_TX_APP_CNT(ext_phy));
> +	data[ei++] = FIELD_GET(MT_ETBF_TX_IBF_CNT, cnt);
> +	data[ei++] = FIELD_GET(MT_ETBF_TX_EBF_CNT, cnt);
> +
> +	/* Tx Beamformer Rx feedback monitor */
> +	cnt = mt76_rr(dev, MT_ETBF_RX_FB_CNT(ext_phy));
> +	data[ei++] = FIELD_GET(MT_ETBF_RX_FB_ALL, cnt);
> +	data[ei++] = FIELD_GET(MT_ETBF_RX_FB_HE, cnt);
> +	data[ei++] = FIELD_GET(MT_ETBF_RX_FB_VHT, cnt);
> +	data[ei++] = FIELD_GET(MT_ETBF_RX_FB_HT, cnt);
> +
> +	cnt = mt76_rr(dev, MT_ETBF_RX_FB_CONT(ext_phy));
> +	data[ei++] = FIELD_GET(MT_ETBF_RX_FB_BW, cnt);
> +	data[ei++] = FIELD_GET(MT_ETBF_RX_FB_NC, cnt);
> +	data[ei++] = FIELD_GET(MT_ETBF_RX_FB_NR, cnt);
> +
> +	/* Tx Beamformee Rx NDPA & Tx feedback report */
> +	cnt = mt76_rr(dev, MT_ETBF_TX_NDP_BFRP(ext_phy));
> +	data[ei++] = FIELD_GET(MT_ETBF_TX_FB_CPL, cnt);
> +	data[ei++] = FIELD_GET(MT_ETBF_TX_FB_TRI, cnt);
> +
> +	/* Tx SU & MU counters */
> +	cnt = mt76_rr(dev, MT_MIB_SDR34(ext_phy));
> +	data[ei++] = FIELD_GET(MT_MIB_MU_BF_TX_CNT, cnt);
> +
> +	cnt = mt76_rr(dev, MT_MIB_DR8(ext_phy));
> +	data[ei++] = cnt;
> +
> +	cnt = mt76_rr(dev, MT_MIB_DR9(ext_phy));
> +	data[ei++] = cnt; /* MU MPDU SUccessful */
> +
> +	cnt = mt76_rr(dev, MT_MIB_DR11(ext_phy));
> +	data[ei++] = cnt; /* SU MPDU successful */
> +
> +	/* TODO:  External phy too?? */
> +
> +	/* Tx amsdu info (pack-count histogram) */
> +	for (i = 0; i < 8; i++)
> +		data[ei++] = mt76_rr(dev,  MT_PLE_AMSDU_PACK_MSDU_CNT(i));
> +
> +	WARN_ON(ei != MT7915_SSTATS_LEN);
> +}
> +
>  const struct ieee80211_ops mt7915_ops = {
>  	.tx = mt7915_tx,
>  	.start = mt7915_start,
> @@ -1052,6 +1185,9 @@ const struct ieee80211_ops mt7915_ops = {
>  	.get_txpower = mt76_get_txpower,
>  	.channel_switch_beacon = mt7915_channel_switch_beacon,
>  	.get_stats = mt7915_get_stats,
> +	.get_et_sset_count = mt7915_get_et_sset_count,
> +	.get_et_stats = mt7915_get_et_stats,
> +	.get_et_strings = mt7915_get_et_strings,
>  	.get_tsf = mt7915_get_tsf,
>  	.set_tsf = mt7915_set_tsf,
>  	.offset_tsf = mt7915_offset_tsf,
> -- 
> 2.20.1
> 

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