On Tue, 2019-08-20 at 18:47 +0300, Kalle Valo wrote:
> +static int ath11k_mac_op_config(struct ieee80211_hw *hw, u32 changed)
> +{
> + struct ath11k *ar = hw->priv;
> + int ret = 0;
> +
> + /* mac80211 requires this op to be present and that's why
> + * there's an empty function, this can be extended when
> + * required.
> + */
Well, oops. Maybe it shouldn't be required?
> + mutex_lock(&ar->conf_mutex);
> +
> + /* TODO: Handle configuration changes as appropriate */
> +
> + mutex_unlock(&ar->conf_mutex);
It's not actually empty though - why bother locking the mutex for
nothing?
> + if (sta->mfp) {
> + /* TODO: Need to check if FW supports PMF? */
Probably not? shouldn't get a sta with MFP unless you advertised support
for it. At least I'd think so, and consider it a mac80211 bug if you
still did.
> + /* This is a workaround for HT-enabled STAs which break the spec
> + * and have no HT capabilities RX mask (no HT RX MCS map).
> + *
> + * As per spec, in section 20.3.5 Modulation and coding scheme (MCS),
> + * MCS 0 through 7 are mandatory in 20MHz with 800 ns GI at all STAs.
Wouldn't that better be in mac80211?
> + ampdu_factor = (vht_cap->cap &
> + IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK) >>
> + IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_SHIFT;
consider u32_get_bits() or something like that from bitfield.h
> + /* Workaround: Some Netgear/Linksys 11ac APs set Rx A-MPDU factor to
> + * zero in VHT IE. Using it would result in degraded throughput.
> + * arg->peer_max_mpdu at this point contains HT max_mpdu so keep
> + * it if VHT max_mpdu is smaller.
> + */
> + arg->peer_max_mpdu = max(arg->peer_max_mpdu,
> + (1U << (IEEE80211_HT_MAX_AMPDU_FACTOR +
> + ampdu_factor)) - 1);
Wait, that seems familiar. Again, put it into mac80211?
> +static void ath11k_peer_assoc_h_smps(struct ieee80211_sta *sta,
> + struct peer_assoc_params *arg)
> +{
> + const struct ieee80211_sta_ht_cap *ht_cap = &sta->ht_cap;
> + int smps;
> +
> + if (!ht_cap->ht_supported)
> + return;
> +
> + smps = ht_cap->cap & IEEE80211_HT_CAP_SM_PS;
> + smps >>= IEEE80211_HT_CAP_SM_PS_SHIFT;
also here, u*_get_bits() or something might be nicer
(and yes, I've written tons of code like this myself before that
existed, which is why I'm pointing it out - it's much nicer)
> +void ath11k_mac_drain_tx(struct ath11k *ar)
> +{
> + /* make sure rcu-protected mac80211 tx path itself is drained */
> + synchronize_net();
Doesn't mac80211 ensure that in the relevant places like flush()? But
then again, not sure where you call this.
> + ath11k_dbg(ar->ab, ATH11K_DBG_MAC, "mac set fixed rate params vdev %i rate 0x%02hhx nss %hhu sgi %hhu\n",
> + arvif->vdev_id, rate, nss, sgi);
nit: that could use a line-break
> + vdev_param = WMI_VDEV_PARAM_FIXED_RATE;
> + ret = ath11k_wmi_vdev_set_param_cmd(ar, arvif->vdev_id,
> + vdev_param, rate);
> + if (ret) {
> + ath11k_warn(ar->ab, "failed to set fixed rate param 0x%02x: %d\n",
>
> + /* TODO: Check if HT capability advertised from firmware is different
> + * for each band for a dual band capable radio. It will be tricky to
> + * handle it when the ht capability different for each band.
> + */
For each band shouldn't really be that tricky?
johannes
