diff options
author | 2016-04-11 10:41:07 +0300 | |
---|---|---|
committer | 2016-04-13 08:17:18 +0300 | |
commit | e09b41010ba33a20a87472ee821fa407a5b8da36 (patch) | |
tree | d10dc367189862e7ca5c592f033dc3726e1df4e3 /kernel/net/mac80211/rate.c | |
parent | f93b97fd65072de626c074dbe099a1fff05ce060 (diff) |
These changes are the raw update to linux-4.4.6-rt14. Kernel sources
are taken from kernel.org, and rt patch from the rt wiki download page.
During the rebasing, the following patch collided:
Force tick interrupt and get rid of softirq magic(I70131fb85).
Collisions have been removed because its logic was found on the
source already.
Change-Id: I7f57a4081d9deaa0d9ccfc41a6c8daccdee3b769
Signed-off-by: José Pekkarinen <jose.pekkarinen@nokia.com>
Diffstat (limited to 'kernel/net/mac80211/rate.c')
-rw-r--r-- | kernel/net/mac80211/rate.c | 333 |
1 files changed, 255 insertions, 78 deletions
diff --git a/kernel/net/mac80211/rate.c b/kernel/net/mac80211/rate.c index d53355b01..a4e2f4e67 100644 --- a/kernel/net/mac80211/rate.c +++ b/kernel/net/mac80211/rate.c @@ -29,6 +29,65 @@ module_param(ieee80211_default_rc_algo, charp, 0644); MODULE_PARM_DESC(ieee80211_default_rc_algo, "Default rate control algorithm for mac80211 to use"); +void rate_control_rate_init(struct sta_info *sta) +{ + struct ieee80211_local *local = sta->sdata->local; + struct rate_control_ref *ref = sta->rate_ctrl; + struct ieee80211_sta *ista = &sta->sta; + void *priv_sta = sta->rate_ctrl_priv; + struct ieee80211_supported_band *sband; + struct ieee80211_chanctx_conf *chanctx_conf; + + ieee80211_sta_set_rx_nss(sta); + + if (!ref) + return; + + rcu_read_lock(); + + chanctx_conf = rcu_dereference(sta->sdata->vif.chanctx_conf); + if (WARN_ON(!chanctx_conf)) { + rcu_read_unlock(); + return; + } + + sband = local->hw.wiphy->bands[chanctx_conf->def.chan->band]; + + spin_lock_bh(&sta->rate_ctrl_lock); + ref->ops->rate_init(ref->priv, sband, &chanctx_conf->def, ista, + priv_sta); + spin_unlock_bh(&sta->rate_ctrl_lock); + rcu_read_unlock(); + set_sta_flag(sta, WLAN_STA_RATE_CONTROL); +} + +void rate_control_rate_update(struct ieee80211_local *local, + struct ieee80211_supported_band *sband, + struct sta_info *sta, u32 changed) +{ + struct rate_control_ref *ref = local->rate_ctrl; + struct ieee80211_sta *ista = &sta->sta; + void *priv_sta = sta->rate_ctrl_priv; + struct ieee80211_chanctx_conf *chanctx_conf; + + if (ref && ref->ops->rate_update) { + rcu_read_lock(); + + chanctx_conf = rcu_dereference(sta->sdata->vif.chanctx_conf); + if (WARN_ON(!chanctx_conf)) { + rcu_read_unlock(); + return; + } + + spin_lock_bh(&sta->rate_ctrl_lock); + ref->ops->rate_update(ref->priv, sband, &chanctx_conf->def, + ista, priv_sta, changed); + spin_unlock_bh(&sta->rate_ctrl_lock); + rcu_read_unlock(); + } + drv_sta_rc_update(local, sta->sdata, &sta->sta, changed); +} + int ieee80211_rate_control_register(const struct rate_control_ops *ops) { struct rate_control_alg *alg; @@ -103,7 +162,7 @@ ieee80211_rate_control_ops_get(const char *name) const struct rate_control_ops *ops; const char *alg_name; - kparam_block_sysfs_write(ieee80211_default_rc_algo); + kernel_param_lock(THIS_MODULE); if (!name) alg_name = ieee80211_default_rc_algo; else @@ -117,7 +176,7 @@ ieee80211_rate_control_ops_get(const char *name) /* try built-in one if specific alg requested but not found */ if (!ops && strlen(CONFIG_MAC80211_RC_DEFAULT)) ops = ieee80211_try_rate_control_ops_get(CONFIG_MAC80211_RC_DEFAULT); - kparam_unblock_sysfs_write(ieee80211_default_rc_algo); + kernel_param_unlock(THIS_MODULE); return ops; } @@ -246,7 +305,10 @@ static void __rate_control_send_low(struct ieee80211_hw *hw, info->control.rates[0].idx = i; break; } - WARN_ON_ONCE(i == sband->n_bitrates); + WARN_ONCE(i == sband->n_bitrates, + "no supported rates (0x%x) in rate_mask 0x%x with flags 0x%x\n", + sta ? sta->supp_rates[sband->band] : -1, + rate_mask, rate_flags); info->control.rates[0].count = (info->flags & IEEE80211_TX_CTL_NO_ACK) ? @@ -294,39 +356,37 @@ bool rate_control_send_low(struct ieee80211_sta *pubsta, } EXPORT_SYMBOL(rate_control_send_low); -static bool rate_idx_match_legacy_mask(struct ieee80211_tx_rate *rate, - int n_bitrates, u32 mask) +static bool rate_idx_match_legacy_mask(s8 *rate_idx, int n_bitrates, u32 mask) { int j; /* See whether the selected rate or anything below it is allowed. */ - for (j = rate->idx; j >= 0; j--) { + for (j = *rate_idx; j >= 0; j--) { if (mask & (1 << j)) { /* Okay, found a suitable rate. Use it. */ - rate->idx = j; + *rate_idx = j; return true; } } /* Try to find a higher rate that would be allowed */ - for (j = rate->idx + 1; j < n_bitrates; j++) { + for (j = *rate_idx + 1; j < n_bitrates; j++) { if (mask & (1 << j)) { /* Okay, found a suitable rate. Use it. */ - rate->idx = j; + *rate_idx = j; return true; } } return false; } -static bool rate_idx_match_mcs_mask(struct ieee80211_tx_rate *rate, - u8 mcs_mask[IEEE80211_HT_MCS_MASK_LEN]) +static bool rate_idx_match_mcs_mask(s8 *rate_idx, u8 *mcs_mask) { int i, j; int ridx, rbit; - ridx = rate->idx / 8; - rbit = rate->idx % 8; + ridx = *rate_idx / 8; + rbit = *rate_idx % 8; /* sanity check */ if (ridx < 0 || ridx >= IEEE80211_HT_MCS_MASK_LEN) @@ -336,20 +396,20 @@ static bool rate_idx_match_mcs_mask(struct ieee80211_tx_rate *rate, for (i = ridx; i >= 0; i--) { for (j = rbit; j >= 0; j--) if (mcs_mask[i] & BIT(j)) { - rate->idx = i * 8 + j; + *rate_idx = i * 8 + j; return true; } rbit = 7; } /* Try to find a higher rate that would be allowed */ - ridx = (rate->idx + 1) / 8; - rbit = (rate->idx + 1) % 8; + ridx = (*rate_idx + 1) / 8; + rbit = (*rate_idx + 1) % 8; for (i = ridx; i < IEEE80211_HT_MCS_MASK_LEN; i++) { for (j = rbit; j < 8; j++) if (mcs_mask[i] & BIT(j)) { - rate->idx = i * 8 + j; + *rate_idx = i * 8 + j; return true; } rbit = 0; @@ -357,37 +417,93 @@ static bool rate_idx_match_mcs_mask(struct ieee80211_tx_rate *rate, return false; } +static bool rate_idx_match_vht_mcs_mask(s8 *rate_idx, u16 *vht_mask) +{ + int i, j; + int ridx, rbit; + + ridx = *rate_idx >> 4; + rbit = *rate_idx & 0xf; + + if (ridx < 0 || ridx >= NL80211_VHT_NSS_MAX) + return false; + + /* See whether the selected rate or anything below it is allowed. */ + for (i = ridx; i >= 0; i--) { + for (j = rbit; j >= 0; j--) { + if (vht_mask[i] & BIT(j)) { + *rate_idx = (i << 4) | j; + return true; + } + } + rbit = 15; + } + + /* Try to find a higher rate that would be allowed */ + ridx = (*rate_idx + 1) >> 4; + rbit = (*rate_idx + 1) & 0xf; + for (i = ridx; i < NL80211_VHT_NSS_MAX; i++) { + for (j = rbit; j < 16; j++) { + if (vht_mask[i] & BIT(j)) { + *rate_idx = (i << 4) | j; + return true; + } + } + rbit = 0; + } + return false; +} -static void rate_idx_match_mask(struct ieee80211_tx_rate *rate, +static void rate_idx_match_mask(s8 *rate_idx, u16 *rate_flags, struct ieee80211_supported_band *sband, enum nl80211_chan_width chan_width, u32 mask, - u8 mcs_mask[IEEE80211_HT_MCS_MASK_LEN]) + u8 mcs_mask[IEEE80211_HT_MCS_MASK_LEN], + u16 vht_mask[NL80211_VHT_NSS_MAX]) { - struct ieee80211_tx_rate alt_rate; + if (*rate_flags & IEEE80211_TX_RC_VHT_MCS) { + /* handle VHT rates */ + if (rate_idx_match_vht_mcs_mask(rate_idx, vht_mask)) + return; + + *rate_idx = 0; + /* keep protection flags */ + *rate_flags &= (IEEE80211_TX_RC_USE_RTS_CTS | + IEEE80211_TX_RC_USE_CTS_PROTECT | + IEEE80211_TX_RC_USE_SHORT_PREAMBLE); - /* handle HT rates */ - if (rate->flags & IEEE80211_TX_RC_MCS) { - if (rate_idx_match_mcs_mask(rate, mcs_mask)) + *rate_flags |= IEEE80211_TX_RC_MCS; + if (chan_width == NL80211_CHAN_WIDTH_40) + *rate_flags |= IEEE80211_TX_RC_40_MHZ_WIDTH; + + if (rate_idx_match_mcs_mask(rate_idx, mcs_mask)) return; /* also try the legacy rates. */ - alt_rate.idx = 0; + *rate_flags &= ~(IEEE80211_TX_RC_MCS | + IEEE80211_TX_RC_40_MHZ_WIDTH); + if (rate_idx_match_legacy_mask(rate_idx, sband->n_bitrates, + mask)) + return; + } else if (*rate_flags & IEEE80211_TX_RC_MCS) { + /* handle HT rates */ + if (rate_idx_match_mcs_mask(rate_idx, mcs_mask)) + return; + + /* also try the legacy rates. */ + *rate_idx = 0; /* keep protection flags */ - alt_rate.flags = rate->flags & - (IEEE80211_TX_RC_USE_RTS_CTS | - IEEE80211_TX_RC_USE_CTS_PROTECT | - IEEE80211_TX_RC_USE_SHORT_PREAMBLE); - alt_rate.count = rate->count; - if (rate_idx_match_legacy_mask(&alt_rate, - sband->n_bitrates, mask)) { - *rate = alt_rate; + *rate_flags &= (IEEE80211_TX_RC_USE_RTS_CTS | + IEEE80211_TX_RC_USE_CTS_PROTECT | + IEEE80211_TX_RC_USE_SHORT_PREAMBLE); + if (rate_idx_match_legacy_mask(rate_idx, sband->n_bitrates, + mask)) return; - } - } else if (!(rate->flags & IEEE80211_TX_RC_VHT_MCS)) { + } else { /* handle legacy rates */ - if (rate_idx_match_legacy_mask(rate, sband->n_bitrates, mask)) + if (rate_idx_match_legacy_mask(rate_idx, sband->n_bitrates, + mask)) return; /* if HT BSS, and we handle a data frame, also try HT rates */ @@ -400,23 +516,19 @@ static void rate_idx_match_mask(struct ieee80211_tx_rate *rate, break; } - alt_rate.idx = 0; + *rate_idx = 0; /* keep protection flags */ - alt_rate.flags = rate->flags & - (IEEE80211_TX_RC_USE_RTS_CTS | - IEEE80211_TX_RC_USE_CTS_PROTECT | - IEEE80211_TX_RC_USE_SHORT_PREAMBLE); - alt_rate.count = rate->count; + *rate_flags &= (IEEE80211_TX_RC_USE_RTS_CTS | + IEEE80211_TX_RC_USE_CTS_PROTECT | + IEEE80211_TX_RC_USE_SHORT_PREAMBLE); - alt_rate.flags |= IEEE80211_TX_RC_MCS; + *rate_flags |= IEEE80211_TX_RC_MCS; if (chan_width == NL80211_CHAN_WIDTH_40) - alt_rate.flags |= IEEE80211_TX_RC_40_MHZ_WIDTH; + *rate_flags |= IEEE80211_TX_RC_40_MHZ_WIDTH; - if (rate_idx_match_mcs_mask(&alt_rate, mcs_mask)) { - *rate = alt_rate; + if (rate_idx_match_mcs_mask(rate_idx, mcs_mask)) return; - } } /* @@ -569,18 +681,92 @@ static void rate_control_fill_sta_table(struct ieee80211_sta *sta, } } +static bool rate_control_cap_mask(struct ieee80211_sub_if_data *sdata, + struct ieee80211_supported_band *sband, + struct ieee80211_sta *sta, u32 *mask, + u8 mcs_mask[IEEE80211_HT_MCS_MASK_LEN], + u16 vht_mask[NL80211_VHT_NSS_MAX]) +{ + u32 i, flags; + + *mask = sdata->rc_rateidx_mask[sband->band]; + flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef); + for (i = 0; i < sband->n_bitrates; i++) { + if ((flags & sband->bitrates[i].flags) != flags) + *mask &= ~BIT(i); + } + + if (*mask == (1 << sband->n_bitrates) - 1 && + !sdata->rc_has_mcs_mask[sband->band] && + !sdata->rc_has_vht_mcs_mask[sband->band]) + return false; + + if (sdata->rc_has_mcs_mask[sband->band]) + memcpy(mcs_mask, sdata->rc_rateidx_mcs_mask[sband->band], + IEEE80211_HT_MCS_MASK_LEN); + else + memset(mcs_mask, 0xff, IEEE80211_HT_MCS_MASK_LEN); + + if (sdata->rc_has_vht_mcs_mask[sband->band]) + memcpy(vht_mask, sdata->rc_rateidx_vht_mcs_mask[sband->band], + sizeof(u16) * NL80211_VHT_NSS_MAX); + else + memset(vht_mask, 0xff, sizeof(u16) * NL80211_VHT_NSS_MAX); + + if (sta) { + __le16 sta_vht_cap; + u16 sta_vht_mask[NL80211_VHT_NSS_MAX]; + + /* Filter out rates that the STA does not support */ + *mask &= sta->supp_rates[sband->band]; + for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++) + mcs_mask[i] &= sta->ht_cap.mcs.rx_mask[i]; + + sta_vht_cap = sta->vht_cap.vht_mcs.rx_mcs_map; + ieee80211_get_vht_mask_from_cap(sta_vht_cap, sta_vht_mask); + for (i = 0; i < NL80211_VHT_NSS_MAX; i++) + vht_mask[i] &= sta_vht_mask[i]; + } + + return true; +} + +static void +rate_control_apply_mask_ratetbl(struct sta_info *sta, + struct ieee80211_supported_band *sband, + struct ieee80211_sta_rates *rates) +{ + int i; + u32 mask; + u8 mcs_mask[IEEE80211_HT_MCS_MASK_LEN]; + u16 vht_mask[NL80211_VHT_NSS_MAX]; + enum nl80211_chan_width chan_width; + + if (!rate_control_cap_mask(sta->sdata, sband, &sta->sta, &mask, + mcs_mask, vht_mask)) + return; + + chan_width = sta->sdata->vif.bss_conf.chandef.width; + for (i = 0; i < IEEE80211_TX_RATE_TABLE_SIZE; i++) { + if (rates->rate[i].idx < 0) + break; + + rate_idx_match_mask(&rates->rate[i].idx, &rates->rate[i].flags, + sband, chan_width, mask, mcs_mask, + vht_mask); + } +} + static void rate_control_apply_mask(struct ieee80211_sub_if_data *sdata, struct ieee80211_sta *sta, struct ieee80211_supported_band *sband, - struct ieee80211_tx_info *info, struct ieee80211_tx_rate *rates, int max_rates) { enum nl80211_chan_width chan_width; u8 mcs_mask[IEEE80211_HT_MCS_MASK_LEN]; - bool has_mcs_mask; u32 mask; - u32 rate_flags; + u16 rate_flags, vht_mask[NL80211_VHT_NSS_MAX]; int i; /* @@ -588,30 +774,10 @@ static void rate_control_apply_mask(struct ieee80211_sub_if_data *sdata, * default mask (allow all rates) is used to save some processing for * the common case. */ - mask = sdata->rc_rateidx_mask[info->band]; - has_mcs_mask = sdata->rc_has_mcs_mask[info->band]; - rate_flags = - ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef); - for (i = 0; i < sband->n_bitrates; i++) - if ((rate_flags & sband->bitrates[i].flags) != rate_flags) - mask &= ~BIT(i); - - if (mask == (1 << sband->n_bitrates) - 1 && !has_mcs_mask) + if (!rate_control_cap_mask(sdata, sband, sta, &mask, mcs_mask, + vht_mask)) return; - if (has_mcs_mask) - memcpy(mcs_mask, sdata->rc_rateidx_mcs_mask[info->band], - sizeof(mcs_mask)); - else - memset(mcs_mask, 0xff, sizeof(mcs_mask)); - - if (sta) { - /* Filter out rates that the STA does not support */ - mask &= sta->supp_rates[info->band]; - for (i = 0; i < sizeof(mcs_mask); i++) - mcs_mask[i] &= sta->ht_cap.mcs.rx_mask[i]; - } - /* * Make sure the rate index selected for each TX rate is * included in the configured mask and change the rate indexes @@ -623,8 +789,10 @@ static void rate_control_apply_mask(struct ieee80211_sub_if_data *sdata, if (rates[i].idx < 0) break; - rate_idx_match_mask(&rates[i], sband, chan_width, mask, - mcs_mask); + rate_flags = rates[i].flags; + rate_idx_match_mask(&rates[i].idx, &rate_flags, sband, + chan_width, mask, mcs_mask, vht_mask); + rates[i].flags = rate_flags; } } @@ -648,7 +816,7 @@ void ieee80211_get_tx_rates(struct ieee80211_vif *vif, sband = sdata->local->hw.wiphy->bands[info->band]; if (ieee80211_is_data(hdr->frame_control)) - rate_control_apply_mask(sdata, sta, sband, info, dest, max_rates); + rate_control_apply_mask(sdata, sta, sband, dest, max_rates); if (dest[0].idx < 0) __rate_control_send_low(&sdata->local->hw, sband, sta, info, @@ -680,12 +848,18 @@ void rate_control_get_rate(struct ieee80211_sub_if_data *sdata, info->control.rates[i].count = 0; } - if (sdata->local->hw.flags & IEEE80211_HW_HAS_RATE_CONTROL) + if (ieee80211_hw_check(&sdata->local->hw, HAS_RATE_CONTROL)) return; - ref->ops->get_rate(ref->priv, ista, priv_sta, txrc); + if (ista) { + spin_lock_bh(&sta->rate_ctrl_lock); + ref->ops->get_rate(ref->priv, ista, priv_sta, txrc); + spin_unlock_bh(&sta->rate_ctrl_lock); + } else { + ref->ops->get_rate(ref->priv, NULL, NULL, txrc); + } - if (sdata->local->hw.flags & IEEE80211_HW_SUPPORTS_RC_TABLE) + if (ieee80211_hw_check(&sdata->local->hw, SUPPORTS_RC_TABLE)) return; ieee80211_get_tx_rates(&sdata->vif, ista, txrc->skb, @@ -699,7 +873,10 @@ int rate_control_set_rates(struct ieee80211_hw *hw, { struct sta_info *sta = container_of(pubsta, struct sta_info, sta); struct ieee80211_sta_rates *old; + struct ieee80211_supported_band *sband; + sband = hw->wiphy->bands[ieee80211_get_sdata_band(sta->sdata)]; + rate_control_apply_mask_ratetbl(sta, sband, rates); /* * mac80211 guarantees that this function will not be called * concurrently, so the following RCU access is safe, even without @@ -727,7 +904,7 @@ int ieee80211_init_rate_ctrl_alg(struct ieee80211_local *local, if (local->open_count) return -EBUSY; - if (local->hw.flags & IEEE80211_HW_HAS_RATE_CONTROL) { + if (ieee80211_hw_check(&local->hw, HAS_RATE_CONTROL)) { if (WARN_ON(!local->ops->set_rts_threshold)) return -EINVAL; return 0; |