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mac80211: add an optional TXQ for other PS-buffered frames

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Some drivers may want to also use the TXQ abstraction with
non-data packets that need powersave buffering, so add a
hardware flag to allow this.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Johannes Berg 2018-08-31 11:31:08 +03:00
parent 331aead520
commit adf8ed01e4
6 changed files with 59 additions and 26 deletions
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17
include/net/mac80211.h
View File

@ -101,8 +101,9 @@
* Drivers indicate that they use this model by implementing the .wake_tx_queue
* driver operation.
*
* Intermediate queues (struct ieee80211_txq) are kept per-sta per-tid, with a
* single per-vif queue for multicast data frames.
* Intermediate queues (struct ieee80211_txq) are kept per-sta per-tid, with
* another per-sta for non-data/non-mgmt and bufferable management frames, and
* a single per-vif queue for multicast data frames.
*
* The driver is expected to initialize its private per-queue data for stations
* and interfaces in the .add_interface and .sta_add ops.
@ -1843,7 +1844,8 @@ struct ieee80211_sta_rates {
* unlimited.
* @support_p2p_ps: indicates whether the STA supports P2P PS mechanism or not.
* @max_rc_amsdu_len: Maximum A-MSDU size in bytes recommended by rate control.
* @txq: per-TID data TX queues (if driver uses the TXQ abstraction)
* @txq: per-TID data TX queues (if driver uses the TXQ abstraction); note that
* the last entry (%IEEE80211_NUM_TIDS) is used for non-data frames
*/
struct ieee80211_sta {
u32 supp_rates[NUM_NL80211_BANDS];
@ -1884,7 +1886,7 @@ struct ieee80211_sta {
bool support_p2p_ps;
u16 max_rc_amsdu_len;
struct ieee80211_txq *txq[IEEE80211_NUM_TIDS];
struct ieee80211_txq *txq[IEEE80211_NUM_TIDS + 1];
/* must be last */
u8 drv_priv[0] __aligned(sizeof(void *));
@ -1918,7 +1920,8 @@ struct ieee80211_tx_control {
*
* @vif: &struct ieee80211_vif pointer from the add_interface callback.
* @sta: station table entry, %NULL for per-vif queue
* @tid: the TID for this queue (unused for per-vif queue)
* @tid: the TID for this queue (unused for per-vif queue),
* %IEEE80211_NUM_TIDS for non-data (if enabled)
* @ac: the AC for this queue
* @drv_priv: driver private area, sized by hw->txq_data_size
*
@ -2131,6 +2134,9 @@ struct ieee80211_txq {
* @IEEE80211_HW_DOESNT_SUPPORT_QOS_NDP: The driver (or firmware) doesn't
* support QoS NDP for AP probing - that's most likely a driver bug.
*
* @IEEE80211_HW_BUFF_MMPDU_TXQ: use the TXQ for bufferable MMPDUs, this of
* course requires the driver to use TXQs to start with.
*
* @NUM_IEEE80211_HW_FLAGS: number of hardware flags, used for sizing arrays
*/
enum ieee80211_hw_flags {
@ -2176,6 +2182,7 @@ enum ieee80211_hw_flags {
IEEE80211_HW_SUPPORTS_TDLS_BUFFER_STA,
IEEE80211_HW_DEAUTH_NEED_MGD_TX_PREP,
IEEE80211_HW_DOESNT_SUPPORT_QOS_NDP,
IEEE80211_HW_BUFF_MMPDU_TXQ,
/* keep last, obviously */
NUM_IEEE80211_HW_FLAGS

2
net/mac80211/debugfs.c
View File

@ -3,6 +3,7 @@
*
* Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
* Copyright 2013-2014 Intel Mobile Communications GmbH
* Copyright (C) 2018 Intel Corporation
*
* GPLv2
*
@ -214,6 +215,7 @@ static const char *hw_flag_names[] = {
FLAG(SUPPORTS_TDLS_BUFFER_STA),
FLAG(DEAUTH_NEED_MGD_TX_PREP),
FLAG(DOESNT_SUPPORT_QOS_NDP),
FLAG(BUFF_MMPDU_TXQ),
#undef FLAG
};

6
net/mac80211/debugfs_sta.c
View File

@ -141,7 +141,7 @@ static ssize_t sta_aqm_read(struct file *file, char __user *userbuf,
{
struct sta_info *sta = file->private_data;
struct ieee80211_local *local = sta->local;
size_t bufsz = AQM_TXQ_ENTRY_LEN*(IEEE80211_NUM_TIDS+1);
size_t bufsz = AQM_TXQ_ENTRY_LEN * (IEEE80211_NUM_TIDS + 2);
char *buf = kzalloc(bufsz, GFP_KERNEL), *p = buf;
struct txq_info *txqi;
ssize_t rv;
@ -163,7 +163,9 @@ static ssize_t sta_aqm_read(struct file *file, char __user *userbuf,
bufsz+buf-p,
"tid ac backlog-bytes backlog-packets new-flows drops marks overlimit collisions tx-bytes tx-packets flags\n");
for (i = 0; i < IEEE80211_NUM_TIDS; i++) {
for (i = 0; i < ARRAY_SIZE(sta->sta.txq); i++) {
if (!sta->sta.txq[i])
continue;
txqi = to_txq_info(sta->sta.txq[i]);
p += scnprintf(p, bufsz+buf-p,
"%d %d %u %u %u %u %u %u %u %u %u 0x%lx(%s%s%s)\n",

2
net/mac80211/rx.c
View File

@ -1505,7 +1505,7 @@ static void sta_ps_start(struct sta_info *sta)
if (!sta->sta.txq[0])
return;
for (tid = 0; tid < ARRAY_SIZE(sta->sta.txq); tid++) {
for (tid = 0; tid < IEEE80211_NUM_TIDS; tid++) {
if (txq_has_queue(sta->sta.txq[tid]))
set_bit(tid, &sta->txq_buffered_tids);
else

21
net/mac80211/sta_info.c
View File

@ -113,7 +113,12 @@ static void __cleanup_single_sta(struct sta_info *sta)
if (sta->sta.txq[0]) {
for (i = 0; i < ARRAY_SIZE(sta->sta.txq); i++) {
struct txq_info *txqi = to_txq_info(sta->sta.txq[i]);
struct txq_info *txqi;
if (!sta->sta.txq[i])
continue;
txqi = to_txq_info(sta->sta.txq[i]);
spin_lock_bh(&fq->lock);
ieee80211_txq_purge(local, txqi);
@ -374,6 +379,7 @@ struct sta_info *sta_info_alloc(struct ieee80211_sub_if_data *sdata,
for (i = 0; i < ARRAY_SIZE(sta->sta.txq); i++) {
struct txq_info *txq = txq_data + i * size;
/* might not do anything for the bufferable MMPDU TXQ */
ieee80211_txq_init(sdata, sta, txq, i);
}
}
@ -1239,13 +1245,11 @@ void ieee80211_sta_ps_deliver_wakeup(struct sta_info *sta)
if (!ieee80211_hw_check(&local->hw, AP_LINK_PS))
drv_sta_notify(local, sdata, STA_NOTIFY_AWAKE, &sta->sta);
if (sta->sta.txq[0]) {
for (i = 0; i < ARRAY_SIZE(sta->sta.txq); i++) {
if (!txq_has_queue(sta->sta.txq[i]))
continue;
for (i = 0; i < ARRAY_SIZE(sta->sta.txq); i++) {
if (!sta->sta.txq[i] || !txq_has_queue(sta->sta.txq[i]))
continue;
drv_wake_tx_queue(local, to_txq_info(sta->sta.txq[i]));
}
drv_wake_tx_queue(local, to_txq_info(sta->sta.txq[i]));
}
skb_queue_head_init(&pending);
@ -1683,7 +1687,8 @@ ieee80211_sta_ps_deliver_response(struct sta_info *sta,
return;
for (tid = 0; tid < ARRAY_SIZE(sta->sta.txq); tid++) {
if (!(driver_release_tids & BIT(tid)) ||
if (!sta->sta.txq[tid] ||
!(driver_release_tids & BIT(tid)) ||
txq_has_queue(sta->sta.txq[tid]))
continue;

37
net/mac80211/tx.c
View File

@ -1249,10 +1249,17 @@ static struct txq_info *ieee80211_get_txq(struct ieee80211_local *local,
(info->control.flags & IEEE80211_TX_CTRL_PS_RESPONSE))
return NULL;
if (!ieee80211_is_data_present(hdr->frame_control))
return NULL;
if (sta) {
if (unlikely(!ieee80211_is_data_present(hdr->frame_control))) {
if ((!ieee80211_is_mgmt(hdr->frame_control) ||
ieee80211_is_bufferable_mmpdu(hdr->frame_control)) &&
sta && sta->uploaded) {
/*
* This will be NULL if the driver didn't set the
* opt-in hardware flag.
*/
txq = sta->sta.txq[IEEE80211_NUM_TIDS];
}
} else if (sta) {
u8 tid = skb->priority & IEEE80211_QOS_CTL_TID_MASK;
if (!sta->uploaded)
@ -1440,16 +1447,26 @@ void ieee80211_txq_init(struct ieee80211_sub_if_data *sdata,
txqi->txq.vif = &sdata->vif;
if (sta) {
txqi->txq.sta = &sta->sta;
sta->sta.txq[tid] = &txqi->txq;
txqi->txq.tid = tid;
txqi->txq.ac = ieee80211_ac_from_tid(tid);
} else {
if (!sta) {
sdata->vif.txq = &txqi->txq;
txqi->txq.tid = 0;
txqi->txq.ac = IEEE80211_AC_BE;
return;
}
if (tid == IEEE80211_NUM_TIDS) {
/* Drivers need to opt in to the bufferable MMPDU TXQ */
if (!ieee80211_hw_check(&sdata->local->hw, BUFF_MMPDU_TXQ))
return;
txqi->txq.ac = IEEE80211_AC_VO;
} else {
txqi->txq.ac = ieee80211_ac_from_tid(tid);
}
txqi->txq.sta = &sta->sta;
txqi->txq.tid = tid;
sta->sta.txq[tid] = &txqi->txq;
}
void ieee80211_txq_purge(struct ieee80211_local *local,