diff options
Diffstat (limited to 'net/mac80211')
| -rw-r--r-- | net/mac80211/rx.c | 102 | ||||
| -rw-r--r-- | net/mac80211/sta_info.c | 170 | ||||
| -rw-r--r-- | net/mac80211/sta_info.h | 8 | ||||
| -rw-r--r-- | net/mac80211/status.c | 15 | ||||
| -rw-r--r-- | net/mac80211/tx.c | 8 |
5 files changed, 224 insertions, 79 deletions
diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c index db46601e50b..9a703f00b5f 100644 --- a/net/mac80211/rx.c +++ b/net/mac80211/rx.c @@ -1163,6 +1163,79 @@ int ieee80211_sta_ps_transition(struct ieee80211_sta *sta, bool start) EXPORT_SYMBOL(ieee80211_sta_ps_transition); static ieee80211_rx_result debug_noinline +ieee80211_rx_h_uapsd_and_pspoll(struct ieee80211_rx_data *rx) +{ + struct ieee80211_sub_if_data *sdata = rx->sdata; + struct ieee80211_hdr *hdr = (void *)rx->skb->data; + struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); + int tid, ac; + + if (!rx->sta || !(status->rx_flags & IEEE80211_RX_RA_MATCH)) + return RX_CONTINUE; + + if (sdata->vif.type != NL80211_IFTYPE_AP && + sdata->vif.type != NL80211_IFTYPE_AP_VLAN) + return RX_CONTINUE; + + /* + * The device handles station powersave, so don't do anything about + * uAPSD and PS-Poll frames (the latter shouldn't even come up from + * it to mac80211 since they're handled.) + */ + if (sdata->local->hw.flags & IEEE80211_HW_AP_LINK_PS) + return RX_CONTINUE; + + /* + * Don't do anything if the station isn't already asleep. In + * the uAPSD case, the station will probably be marked asleep, + * in the PS-Poll case the station must be confused ... + */ + if (!test_sta_flags(rx->sta, WLAN_STA_PS_STA)) + return RX_CONTINUE; + + if (unlikely(ieee80211_is_pspoll(hdr->frame_control))) { + if (!test_sta_flags(rx->sta, WLAN_STA_PS_DRIVER)) + ieee80211_sta_ps_deliver_poll_response(rx->sta); + else + set_sta_flags(rx->sta, WLAN_STA_PSPOLL); + + /* Free PS Poll skb here instead of returning RX_DROP that would + * count as an dropped frame. */ + dev_kfree_skb(rx->skb); + + return RX_QUEUED; + } else if (!ieee80211_has_morefrags(hdr->frame_control) && + !(status->rx_flags & IEEE80211_RX_DEFERRED_RELEASE) && + ieee80211_has_pm(hdr->frame_control) && + (ieee80211_is_data_qos(hdr->frame_control) || + ieee80211_is_qos_nullfunc(hdr->frame_control))) { + tid = *ieee80211_get_qos_ctl(hdr) & IEEE80211_QOS_CTL_TID_MASK; + ac = ieee802_1d_to_ac[tid & 7]; + + /* + * If this AC is not trigger-enabled do nothing. + * + * NB: This could/should check a separate bitmap of trigger- + * enabled queues, but for now we only implement uAPSD w/o + * TSPEC changes to the ACs, so they're always the same. + */ + if (!(rx->sta->sta.uapsd_queues & BIT(ac))) + return RX_CONTINUE; + + /* if we are in a service period, do nothing */ + if (test_sta_flags(rx->sta, WLAN_STA_SP)) + return RX_CONTINUE; + + if (!test_sta_flags(rx->sta, WLAN_STA_PS_DRIVER)) + ieee80211_sta_ps_deliver_uapsd(rx->sta); + else + set_sta_flags(rx->sta, WLAN_STA_UAPSD); + } + + return RX_CONTINUE; +} + +static ieee80211_rx_result debug_noinline ieee80211_rx_h_sta_process(struct ieee80211_rx_data *rx) { struct sta_info *sta = rx->sta; @@ -1473,33 +1546,6 @@ ieee80211_rx_h_defragment(struct ieee80211_rx_data *rx) } static ieee80211_rx_result debug_noinline -ieee80211_rx_h_ps_poll(struct ieee80211_rx_data *rx) -{ - struct ieee80211_sub_if_data *sdata = rx->sdata; - __le16 fc = ((struct ieee80211_hdr *)rx->skb->data)->frame_control; - struct ieee80211_rx_status *status = IEEE80211_SKB_RXCB(rx->skb); - - if (likely(!rx->sta || !ieee80211_is_pspoll(fc) || - !(status->rx_flags & IEEE80211_RX_RA_MATCH))) - return RX_CONTINUE; - - if ((sdata->vif.type != NL80211_IFTYPE_AP) && - (sdata->vif.type != NL80211_IFTYPE_AP_VLAN)) - return RX_DROP_UNUSABLE; - - if (!test_sta_flags(rx->sta, WLAN_STA_PS_DRIVER)) - ieee80211_sta_ps_deliver_poll_response(rx->sta); - else - set_sta_flags(rx->sta, WLAN_STA_PSPOLL); - - /* Free PS Poll skb here instead of returning RX_DROP that would - * count as an dropped frame. */ - dev_kfree_skb(rx->skb); - - return RX_QUEUED; -} - -static ieee80211_rx_result debug_noinline ieee80211_rx_h_remove_qos_control(struct ieee80211_rx_data *rx) { u8 *data = rx->skb->data; @@ -2567,9 +2613,9 @@ static void ieee80211_rx_handlers(struct ieee80211_rx_data *rx) CALL_RXH(ieee80211_rx_h_decrypt) CALL_RXH(ieee80211_rx_h_check_more_data) + CALL_RXH(ieee80211_rx_h_uapsd_and_pspoll) CALL_RXH(ieee80211_rx_h_sta_process) CALL_RXH(ieee80211_rx_h_defragment) - CALL_RXH(ieee80211_rx_h_ps_poll) CALL_RXH(ieee80211_rx_h_michael_mic_verify) /* must be after MMIC verify so header is counted in MPDU mic */ #ifdef CONFIG_MAC80211_MESH diff --git a/net/mac80211/sta_info.c b/net/mac80211/sta_info.c index b3f841948c0..f9079e478f7 100644 --- a/net/mac80211/sta_info.c +++ b/net/mac80211/sta_info.c @@ -248,6 +248,9 @@ static void sta_unblock(struct work_struct *wk) else if (test_and_clear_sta_flags(sta, WLAN_STA_PSPOLL)) { clear_sta_flags(sta, WLAN_STA_PS_DRIVER); ieee80211_sta_ps_deliver_poll_response(sta); + } else if (test_and_clear_sta_flags(sta, WLAN_STA_UAPSD)) { + clear_sta_flags(sta, WLAN_STA_PS_DRIVER); + ieee80211_sta_ps_deliver_uapsd(sta); } else clear_sta_flags(sta, WLAN_STA_PS_DRIVER); } @@ -1117,6 +1120,8 @@ void ieee80211_sta_ps_deliver_wakeup(struct sta_info *sta) struct sk_buff_head pending; int filtered = 0, buffered = 0, ac; + clear_sta_flags(sta, WLAN_STA_SP); + BUILD_BUG_ON(BITS_TO_LONGS(STA_TID_NUM) > 1); sta->driver_buffered_tids = 0; @@ -1152,32 +1157,28 @@ void ieee80211_sta_ps_deliver_wakeup(struct sta_info *sta) #endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */ } -void ieee80211_sta_ps_deliver_poll_response(struct sta_info *sta) +static void +ieee80211_sta_ps_deliver_response(struct sta_info *sta, + int n_frames, u8 ignored_acs, + enum ieee80211_frame_release_type reason) { struct ieee80211_sub_if_data *sdata = sta->sdata; struct ieee80211_local *local = sdata->local; - struct sk_buff *skb = NULL; bool found = false; bool more_data = false; int ac; unsigned long driver_release_tids = 0; - u8 ignore_for_response = sta->sta.uapsd_queues; + struct sk_buff_head frames; - /* - * If all ACs are delivery-enabled then we should reply - * from any of them, if only some are enabled we reply - * only from the non-enabled ones. - */ - if (ignore_for_response == BIT(IEEE80211_NUM_ACS) - 1) - ignore_for_response = 0; + __skb_queue_head_init(&frames); /* - * Get response frame and more data bit for it. + * Get response frame(s) and more data bit for it. */ for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { unsigned long tids; - if (ignore_for_response & BIT(ac)) + if (ignored_acs & BIT(ac)) continue; tids = ieee80211_tids_for_ac(ac); @@ -1187,14 +1188,22 @@ void ieee80211_sta_ps_deliver_poll_response(struct sta_info *sta) if (driver_release_tids) { found = true; } else { - skb = skb_dequeue(&sta->tx_filtered[ac]); - if (!skb) { - skb = skb_dequeue(&sta->ps_tx_buf[ac]); - if (skb) - local->total_ps_buffered--; - } - if (skb) + struct sk_buff *skb; + + while (n_frames > 0) { + skb = skb_dequeue(&sta->tx_filtered[ac]); + if (!skb) { + skb = skb_dequeue( + &sta->ps_tx_buf[ac]); + if (skb) + local->total_ps_buffered--; + } + if (!skb) + break; + n_frames--; found = true; + __skb_queue_tail(&frames, skb); + } } /* @@ -1202,7 +1211,8 @@ void ieee80211_sta_ps_deliver_poll_response(struct sta_info *sta) * certainly there's more data if we release just a * single frame now (from a single TID). */ - if (hweight16(driver_release_tids) > 1) { + if (reason == IEEE80211_FRAME_RELEASE_PSPOLL && + hweight16(driver_release_tids) > 1) { more_data = true; driver_release_tids = BIT(ffs(driver_release_tids) - 1); @@ -1225,38 +1235,56 @@ void ieee80211_sta_ps_deliver_poll_response(struct sta_info *sta) * Should we send it a null-func frame indicating we * have nothing buffered for it? */ - printk(KERN_DEBUG "%s: STA %pM sent PS Poll even " - "though there are no buffered frames for it\n", - sdata->name, sta->sta.addr); + if (reason == IEEE80211_FRAME_RELEASE_PSPOLL) + printk(KERN_DEBUG "%s: STA %pM sent PS Poll even " + "though there are no buffered frames for it\n", + sdata->name, sta->sta.addr); #endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */ return; } - if (skb) { - struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); - struct ieee80211_hdr *hdr = - (struct ieee80211_hdr *) skb->data; + if (!driver_release_tids) { + struct sk_buff_head pending; + struct sk_buff *skb; - /* - * Tell TX path to send this frame even though the STA may - * still remain is PS mode after this frame exchange. - */ - info->flags |= IEEE80211_TX_CTL_PSPOLL_RESPONSE; + skb_queue_head_init(&pending); -#ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG - printk(KERN_DEBUG "STA %pM aid %d: PS Poll\n", - sta->sta.addr, sta->sta.aid); -#endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */ + while ((skb = __skb_dequeue(&frames))) { + struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb); + struct ieee80211_hdr *hdr = (void *) skb->data; - /* Use MoreData flag to indicate whether there are more - * buffered frames for this STA */ - if (!more_data) - hdr->frame_control &= cpu_to_le16(~IEEE80211_FCTL_MOREDATA); - else - hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_MOREDATA); + /* + * Tell TX path to send this frame even though the + * STA may still remain is PS mode after this frame + * exchange. + */ + info->flags |= IEEE80211_TX_CTL_POLL_RESPONSE; + + /* + * Use MoreData flag to indicate whether there are + * more buffered frames for this STA + */ + if (!more_data) + hdr->frame_control &= + cpu_to_le16(~IEEE80211_FCTL_MOREDATA); + else + hdr->frame_control |= + cpu_to_le16(IEEE80211_FCTL_MOREDATA); + + if (reason == IEEE80211_FRAME_RELEASE_UAPSD && + skb_queue_empty(&frames)) { + /* set EOSP for the frame */ + u8 *p = ieee80211_get_qos_ctl(hdr); + *p |= IEEE80211_QOS_CTL_EOSP; + info->flags |= IEEE80211_TX_STATUS_EOSP | + IEEE80211_TX_CTL_REQ_TX_STATUS; + } - ieee80211_add_pending_skb(local, skb); + __skb_queue_tail(&pending, skb); + } + + ieee80211_add_pending_skbs(local, &pending); sta_info_recalc_tim(sta); } else { @@ -1271,8 +1299,7 @@ void ieee80211_sta_ps_deliver_poll_response(struct sta_info *sta) * needs to be set anyway. */ drv_release_buffered_frames(local, sta, driver_release_tids, - 1, IEEE80211_FRAME_RELEASE_PSPOLL, - more_data); + n_frames, reason, more_data); /* * Note that we don't recalculate the TIM bit here as it would @@ -1285,6 +1312,59 @@ void ieee80211_sta_ps_deliver_poll_response(struct sta_info *sta) } } +void ieee80211_sta_ps_deliver_poll_response(struct sta_info *sta) +{ + u8 ignore_for_response = sta->sta.uapsd_queues; + + /* + * If all ACs are delivery-enabled then we should reply + * from any of them, if only some are enabled we reply + * only from the non-enabled ones. + */ + if (ignore_for_response == BIT(IEEE80211_NUM_ACS) - 1) + ignore_for_response = 0; + + ieee80211_sta_ps_deliver_response(sta, 1, ignore_for_response, + IEEE80211_FRAME_RELEASE_PSPOLL); +} + +void ieee80211_sta_ps_deliver_uapsd(struct sta_info *sta) +{ + int n_frames = sta->sta.max_sp; + u8 delivery_enabled = sta->sta.uapsd_queues; + + /* + * If we ever grow support for TSPEC this might happen if + * the TSPEC update from hostapd comes in between a trigger + * frame setting WLAN_STA_UAPSD in the RX path and this + * actually getting called. + */ + if (!delivery_enabled) + return; + + /* Ohh, finally, the service period starts :-) */ + set_sta_flags(sta, WLAN_STA_SP); + + switch (sta->sta.max_sp) { + case 1: + n_frames = 2; + break; + case 2: + n_frames = 4; + break; + case 3: + n_frames = 6; + break; + case 0: + /* XXX: what is a good value? */ + n_frames = 8; + break; + } + + ieee80211_sta_ps_deliver_response(sta, n_frames, ~delivery_enabled, + IEEE80211_FRAME_RELEASE_UAPSD); +} + void ieee80211_sta_block_awake(struct ieee80211_hw *hw, struct ieee80211_sta *pubsta, bool block) { diff --git a/net/mac80211/sta_info.h b/net/mac80211/sta_info.h index 8589afad329..751ad25f925 100644 --- a/net/mac80211/sta_info.h +++ b/net/mac80211/sta_info.h @@ -46,6 +46,11 @@ * @WLAN_STA_TDLS_PEER: Station is a TDLS peer. * @WLAN_STA_TDLS_PEER_AUTH: This TDLS peer is authorized to send direct * packets. This means the link is enabled. + * @WLAN_STA_UAPSD: Station requested unscheduled SP while driver was + * keeping station in power-save mode, reply when the driver + * unblocks the station. + * @WLAN_STA_SP: Station is in a service period, so don't try to + * reply to other uAPSD trigger frames. */ enum ieee80211_sta_info_flags { WLAN_STA_AUTH = 1<<0, @@ -63,6 +68,8 @@ enum ieee80211_sta_info_flags { WLAN_STA_PSPOLL = 1<<13, WLAN_STA_TDLS_PEER = 1<<15, WLAN_STA_TDLS_PEER_AUTH = 1<<16, + WLAN_STA_UAPSD = 1<<17, + WLAN_STA_SP = 1<<18, }; #define STA_TID_NUM 16 @@ -539,5 +546,6 @@ void ieee80211_sta_expire(struct ieee80211_sub_if_data *sdata, void ieee80211_sta_ps_deliver_wakeup(struct sta_info *sta); void ieee80211_sta_ps_deliver_poll_response(struct sta_info *sta); +void ieee80211_sta_ps_deliver_uapsd(struct sta_info *sta); #endif /* STA_INFO_H */ diff --git a/net/mac80211/status.c b/net/mac80211/status.c index 94475eb51d2..b5df9be4d04 100644 --- a/net/mac80211/status.c +++ b/net/mac80211/status.c @@ -76,8 +76,16 @@ static void ieee80211_handle_filtered_frame(struct ieee80211_local *local, hdr->frame_control &= ~cpu_to_le16(IEEE80211_FCTL_MOREDATA); if (ieee80211_is_data_qos(hdr->frame_control)) { - int tid = *ieee80211_get_qos_ctl(hdr) & - IEEE80211_QOS_CTL_TID_MASK; + u8 *p = ieee80211_get_qos_ctl(hdr); + int tid = *p & IEEE80211_QOS_CTL_TID_MASK; + + /* + * Clear EOSP if set, this could happen e.g. + * if an absence period (us being a P2P GO) + * shortens the SP. + */ + if (*p & IEEE80211_QOS_CTL_EOSP) + *p &= ~IEEE80211_QOS_CTL_EOSP; ac = ieee802_1d_to_ac[tid & 7]; } else { ac = IEEE80211_AC_BE; @@ -276,6 +284,9 @@ void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb) if (memcmp(hdr->addr2, sta->sdata->vif.addr, ETH_ALEN)) continue; + if (info->flags & IEEE80211_TX_STATUS_EOSP) + clear_sta_flags(sta, WLAN_STA_SP); + acked = !!(info->flags & IEEE80211_TX_STAT_ACK); if (!acked && test_sta_flags(sta, WLAN_STA_PS_STA)) { /* diff --git a/net/mac80211/tx.c b/net/mac80211/tx.c index a1029449df4..a0676d39fe8 100644 --- a/net/mac80211/tx.c +++ b/net/mac80211/tx.c @@ -456,7 +456,7 @@ ieee80211_tx_h_unicast_ps_buf(struct ieee80211_tx_data *tx) staflags = get_sta_flags(sta); if (unlikely((staflags & (WLAN_STA_PS_STA | WLAN_STA_PS_DRIVER)) && - !(info->flags & IEEE80211_TX_CTL_PSPOLL_RESPONSE))) { + !(info->flags & IEEE80211_TX_CTL_POLL_RESPONSE))) { int ac = skb_get_queue_mapping(tx->skb); #ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG @@ -497,9 +497,9 @@ ieee80211_tx_h_unicast_ps_buf(struct ieee80211_tx_data *tx) } #ifdef CONFIG_MAC80211_VERBOSE_PS_DEBUG else if (unlikely(staflags & WLAN_STA_PS_STA)) { - printk(KERN_DEBUG "%s: STA %pM in PS mode, but pspoll " - "set -> send frame\n", tx->sdata->name, - sta->sta.addr); + printk(KERN_DEBUG + "%s: STA %pM in PS mode, but polling/in SP -> send frame\n", + tx->sdata->name, sta->sta.addr); } #endif /* CONFIG_MAC80211_VERBOSE_PS_DEBUG */ |