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ecrnx_txq.c
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ecrnx_txq.c
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/**
******************************************************************************
*
* @file ecrnx_txq.c
*
* Copyright (C) ESWIN 2015-2020
*
******************************************************************************
*/
#include "ecrnx_defs.h"
#include "ecrnx_tx.h"
#include "ipc_host.h"
#include "ecrnx_events.h"
/******************************************************************************
* Utils functions
*****************************************************************************/
const int nx_tid_prio[NX_NB_TID_PER_STA] = {7, 6, 5, 4, 3, 0, 2, 1};
static inline int ecrnx_txq_sta_idx(struct ecrnx_sta *sta, u8 tid)
{
if (is_multicast_sta(sta->sta_idx))
return NX_FIRST_VIF_TXQ_IDX + sta->vif_idx;
else
return (sta->sta_idx * NX_NB_TXQ_PER_STA) + tid;
}
static inline int ecrnx_txq_vif_idx(struct ecrnx_vif *vif, u8 type)
{
return NX_FIRST_VIF_TXQ_IDX + master_vif_idx(vif) + (type * NX_VIRT_DEV_MAX);
}
struct ecrnx_txq *ecrnx_txq_sta_get(struct ecrnx_sta *sta, u8 tid,
struct ecrnx_hw * ecrnx_hw)
{
if (tid >= NX_NB_TXQ_PER_STA)
tid = 0;
return &ecrnx_hw->txq[ecrnx_txq_sta_idx(sta, tid)];
}
struct ecrnx_txq *ecrnx_txq_vif_get(struct ecrnx_vif *vif, u8 type)
{
if (type > NX_UNK_TXQ_TYPE)
type = NX_BCMC_TXQ_TYPE;
return &vif->ecrnx_hw->txq[ecrnx_txq_vif_idx(vif, type)];
}
static inline struct ecrnx_sta *ecrnx_txq_2_sta(struct ecrnx_txq *txq)
{
return txq->sta;
}
/******************************************************************************
* Init/Deinit functions
*****************************************************************************/
/**
* ecrnx_txq_init - Initialize a TX queue
*
* @txq: TX queue to be initialized
* @idx: TX queue index
* @status: TX queue initial status
* @hwq: Associated HW queue
* @ndev: Net device this queue belongs to
* (may be null for non netdev txq)
*
* Each queue is initialized with the credit of @NX_TXQ_INITIAL_CREDITS.
*/
static void ecrnx_txq_init(struct ecrnx_txq *txq, int idx, u8 status,
struct ecrnx_hwq *hwq, int tid,
struct ecrnx_sta *sta, struct net_device *ndev)
{
int i;
txq->idx = idx;
txq->status = status;
txq->credits = NX_TXQ_INITIAL_CREDITS;
txq->pkt_sent = 0;
skb_queue_head_init(&txq->sk_list);
txq->last_retry_skb = NULL;
txq->nb_retry = 0;
txq->hwq = hwq;
txq->sta = sta;
for (i = 0; i < CONFIG_USER_MAX ; i++)
txq->pkt_pushed[i] = 0;
txq->push_limit = 0;
txq->tid = tid;
#ifdef CONFIG_MAC80211_TXQ
txq->nb_ready_mac80211 = 0;
#endif
txq->ps_id = LEGACY_PS_ID;
if (idx < NX_FIRST_VIF_TXQ_IDX) {
int sta_idx = sta->sta_idx;
int tid = idx - (sta_idx * NX_NB_TXQ_PER_STA);
if (tid < NX_NB_TID_PER_STA)
txq->ndev_idx = NX_STA_NDEV_IDX(tid, sta_idx);
else
txq->ndev_idx = NDEV_NO_TXQ;
} else if (idx < NX_FIRST_UNK_TXQ_IDX) {
txq->ndev_idx = NX_BCMC_TXQ_NDEV_IDX;
} else {
txq->ndev_idx = NDEV_NO_TXQ;
}
txq->ndev = ndev;
#ifdef CONFIG_ECRNX_AMSDUS_TX
txq->amsdu = NULL;
txq->amsdu_len = 0;
#endif /* CONFIG_ECRNX_AMSDUS_TX */
}
/**
* ecrnx_txq_flush - Flush all buffers queued for a TXQ
*
* @ecrnx_hw: main driver data
* @txq: txq to flush
*/
void ecrnx_txq_drop_skb(struct ecrnx_txq *txq, struct sk_buff *skb, struct ecrnx_hw *ecrnx_hw, bool retry_packet)
{
struct ecrnx_sw_txhdr *sw_txhdr;
unsigned long queued_time = 0;
skb_unlink(skb, &txq->sk_list);
sw_txhdr = ((struct ecrnx_txhdr *)skb->data)->sw_hdr;
/* hwq->len doesn't count skb to retry */
queued_time = jiffies - sw_txhdr->jiffies;
trace_txq_drop_skb(skb, txq, queued_time);
#ifdef CONFIG_ECRNX_AMSDUS_TX
if (sw_txhdr->desc.host.packet_cnt > 1) {
struct ecrnx_amsdu_txhdr *amsdu_txhdr;
list_for_each_entry(amsdu_txhdr, &sw_txhdr->amsdu.hdrs, list) {
dev_kfree_skb_any(amsdu_txhdr->skb);
}
if (txq->amsdu == sw_txhdr)
txq->amsdu = NULL;
}
#endif
kmem_cache_free(ecrnx_hw->sw_txhdr_cache, sw_txhdr);
if (retry_packet) {
txq->nb_retry--;
if (txq->nb_retry == 0) {
WARN(skb != txq->last_retry_skb,
"last dropped retry buffer is not the expected one");
txq->last_retry_skb = NULL;
}
}
dev_kfree_skb_any(skb);
}
/**
* ecrnx_txq_flush - Flush all buffers queued for a TXQ
*
* @ecrnx_hw: main driver data
* @txq: txq to flush
*/
void ecrnx_txq_flush(struct ecrnx_hw *ecrnx_hw, struct ecrnx_txq *txq)
{
int i, pushed = 0;
while(!skb_queue_empty(&txq->sk_list)) {
ecrnx_txq_drop_skb(txq, skb_peek(&txq->sk_list), ecrnx_hw, txq->nb_retry);
}
for (i = 0; i < CONFIG_USER_MAX; i++) {
pushed += txq->pkt_pushed[i];
}
if (pushed)
dev_warn(ecrnx_hw->dev, "TXQ[%d]: %d skb still pushed to the FW",
txq->idx, pushed);
}
/**
* ecrnx_txq_deinit - De-initialize a TX queue
*
* @ecrnx_hw: Driver main data
* @txq: TX queue to be de-initialized
* Any buffer stuck in a queue will be freed.
*/
static void ecrnx_txq_deinit(struct ecrnx_hw *ecrnx_hw, struct ecrnx_txq *txq)
{
if (txq->idx == TXQ_INACTIVE)
return;
spin_lock_bh(&ecrnx_hw->tx_lock);
ecrnx_txq_del_from_hw_list(txq);
txq->idx = TXQ_INACTIVE;
spin_unlock_bh(&ecrnx_hw->tx_lock);
ecrnx_txq_flush(ecrnx_hw, txq);
}
/**
* ecrnx_txq_vif_init - Initialize all TXQ linked to a vif
*
* @ecrnx_hw: main driver data
* @ecrnx_vif: Pointer on VIF
* @status: Intial txq status
*
* Softmac : 1 VIF TXQ per HWQ
*
* Fullmac : 1 VIF TXQ for BC/MC
* 1 VIF TXQ for MGMT to unknown STA
*/
void ecrnx_txq_vif_init(struct ecrnx_hw *ecrnx_hw, struct ecrnx_vif *ecrnx_vif,
u8 status)
{
struct ecrnx_txq *txq;
int idx;
txq = ecrnx_txq_vif_get(ecrnx_vif, NX_BCMC_TXQ_TYPE);
idx = ecrnx_txq_vif_idx(ecrnx_vif, NX_BCMC_TXQ_TYPE);
ecrnx_txq_init(txq, idx, status, &ecrnx_hw->hwq[ECRNX_HWQ_BE], 0,
&ecrnx_hw->sta_table[ecrnx_vif->ap.bcmc_index], ecrnx_vif->ndev);
txq = ecrnx_txq_vif_get(ecrnx_vif, NX_UNK_TXQ_TYPE);
idx = ecrnx_txq_vif_idx(ecrnx_vif, NX_UNK_TXQ_TYPE);
ecrnx_txq_init(txq, idx, status, &ecrnx_hw->hwq[ECRNX_HWQ_VO], TID_MGT,
NULL, ecrnx_vif->ndev);
}
/**
* ecrnx_txq_vif_deinit - Deinitialize all TXQ linked to a vif
*
* @ecrnx_hw: main driver data
* @ecrnx_vif: Pointer on VIF
*/
void ecrnx_txq_vif_deinit(struct ecrnx_hw * ecrnx_hw, struct ecrnx_vif *ecrnx_vif)
{
struct ecrnx_txq *txq;
txq = ecrnx_txq_vif_get(ecrnx_vif, NX_BCMC_TXQ_TYPE);
ecrnx_txq_deinit(ecrnx_hw, txq);
txq = ecrnx_txq_vif_get(ecrnx_vif, NX_UNK_TXQ_TYPE);
ecrnx_txq_deinit(ecrnx_hw, txq);
}
/**
* ecrnx_txq_sta_init - Initialize TX queues for a STA
*
* @ecrnx_hw: Main driver data
* @ecrnx_sta: STA for which tx queues need to be initialized
* @status: Intial txq status
*
* This function initialize all the TXQ associated to a STA.
* Softmac : 1 TXQ per TID
*
* Fullmac : 1 TXQ per TID (limited to 8)
* 1 TXQ for MGMT
*/
void ecrnx_txq_sta_init(struct ecrnx_hw *ecrnx_hw, struct ecrnx_sta *ecrnx_sta,
u8 status)
{
struct ecrnx_txq *txq;
int tid, idx;
struct ecrnx_vif *ecrnx_vif = ecrnx_hw->vif_table[ecrnx_sta->vif_idx];
idx = ecrnx_txq_sta_idx(ecrnx_sta, 0);
foreach_sta_txq(ecrnx_sta, txq, tid, ecrnx_hw) {
ecrnx_txq_init(txq, idx, status, &ecrnx_hw->hwq[ecrnx_tid2hwq[tid]], tid,
ecrnx_sta, ecrnx_vif->ndev);
txq->ps_id = ecrnx_sta->uapsd_tids & (1 << tid) ? UAPSD_ID : LEGACY_PS_ID;
idx++;
}
}
/**
* ecrnx_txq_sta_deinit - Deinitialize TX queues for a STA
*
* @ecrnx_hw: Main driver data
* @ecrnx_sta: STA for which tx queues need to be deinitialized
*/
void ecrnx_txq_sta_deinit(struct ecrnx_hw *ecrnx_hw, struct ecrnx_sta *ecrnx_sta)
{
struct ecrnx_txq *txq;
int tid;
foreach_sta_txq(ecrnx_sta, txq, tid, ecrnx_hw) {
ecrnx_txq_deinit(ecrnx_hw, txq);
}
}
/**
* ecrnx_txq_unk_vif_init - Initialize TXQ for unknown STA linked to a vif
*
* @ecrnx_vif: Pointer on VIF
*/
void ecrnx_txq_unk_vif_init(struct ecrnx_vif *ecrnx_vif)
{
struct ecrnx_hw *ecrnx_hw = ecrnx_vif->ecrnx_hw;
struct ecrnx_txq *txq;
int idx;
txq = ecrnx_txq_vif_get(ecrnx_vif, NX_UNK_TXQ_TYPE);
idx = ecrnx_txq_vif_idx(ecrnx_vif, NX_UNK_TXQ_TYPE);
ecrnx_txq_init(txq, idx, 0, &ecrnx_hw->hwq[ECRNX_HWQ_VO], TID_MGT, NULL, ecrnx_vif->ndev);
}
/**
* ecrnx_txq_tdls_vif_deinit - Deinitialize TXQ for unknown STA linked to a vif
*
* @ecrnx_vif: Pointer on VIF
*/
void ecrnx_txq_unk_vif_deinit(struct ecrnx_vif *ecrnx_vif)
{
struct ecrnx_txq *txq;
txq = ecrnx_txq_vif_get(ecrnx_vif, NX_UNK_TXQ_TYPE);
ecrnx_txq_deinit(ecrnx_vif->ecrnx_hw, txq);
}
/**
* ecrnx_init_unk_txq - Initialize TX queue for the transmission on a offchannel
*
* @vif: Interface for which the queue has to be initialized
*
* NOTE: Offchannel txq is only active for the duration of the ROC
*/
void ecrnx_txq_offchan_init(struct ecrnx_vif *ecrnx_vif)
{
struct ecrnx_hw *ecrnx_hw = ecrnx_vif->ecrnx_hw;
struct ecrnx_txq *txq;
txq = &ecrnx_hw->txq[NX_OFF_CHAN_TXQ_IDX];
ecrnx_txq_init(txq, NX_OFF_CHAN_TXQ_IDX, ECRNX_TXQ_STOP_CHAN,
&ecrnx_hw->hwq[ECRNX_HWQ_VO], TID_MGT, NULL, ecrnx_vif->ndev);
}
/**
* ecrnx_deinit_offchan_txq - Deinitialize TX queue for offchannel
*
* @vif: Interface that manages the STA
*
* This function deintialize txq for one STA.
* Any buffer stuck in a queue will be freed.
*/
void ecrnx_txq_offchan_deinit(struct ecrnx_vif *ecrnx_vif)
{
struct ecrnx_txq *txq;
txq = &ecrnx_vif->ecrnx_hw->txq[NX_OFF_CHAN_TXQ_IDX];
ecrnx_txq_deinit(ecrnx_vif->ecrnx_hw, txq);
}
/**
* ecrnx_txq_tdls_vif_init - Initialize TXQ vif for TDLS
*
* @ecrnx_vif: Pointer on VIF
*/
void ecrnx_txq_tdls_vif_init(struct ecrnx_vif *ecrnx_vif)
{
struct ecrnx_hw *ecrnx_hw = ecrnx_vif->ecrnx_hw;
if (!(ecrnx_hw->wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS))
return;
ecrnx_txq_unk_vif_init(ecrnx_vif);
}
/**
* ecrnx_txq_tdls_vif_deinit - Deinitialize TXQ vif for TDLS
*
* @ecrnx_vif: Pointer on VIF
*/
void ecrnx_txq_tdls_vif_deinit(struct ecrnx_vif *ecrnx_vif)
{
struct ecrnx_hw *ecrnx_hw = ecrnx_vif->ecrnx_hw;
if (!(ecrnx_hw->wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS))
return;
ecrnx_txq_unk_vif_deinit(ecrnx_vif);
}
/**
* ecrnx_txq_drop_old_traffic - Drop pkt queued for too long in a TXQ
*
* @txq: TXQ to process
* @ecrnx_hw: Driver main data
* @skb_timeout: Max queue duration, in jiffies, for this queue
* @dropped: Updated to inidicate if at least one skb was dropped
*
* @return Whether there is still pkt queued in this queue.
*/
static bool ecrnx_txq_drop_old_traffic(struct ecrnx_txq *txq, struct ecrnx_hw *ecrnx_hw,
unsigned long skb_timeout, bool *dropped)
{
struct sk_buff *skb, *skb_next;
bool pkt_queued = false;
int retry_packet = txq->nb_retry;
if (txq->idx == TXQ_INACTIVE)
return false;
spin_lock(&ecrnx_hw->tx_lock);
skb_queue_walk_safe(&txq->sk_list, skb, skb_next) {
struct ecrnx_sw_txhdr *sw_txhdr;
if (retry_packet) {
// Don't drop retry packets
retry_packet--;
continue;
}
sw_txhdr = ((struct ecrnx_txhdr *)skb->data)->sw_hdr;
if (!time_after(jiffies, sw_txhdr->jiffies + skb_timeout)) {
pkt_queued = true;
break;
}
*dropped = true;
ecrnx_printk_warn("%s:skb:0x%08x,txq:0x%p, len=%d, txq_idx:%d, ps_active:%d, ps_id:%d, tid:%d, credits:%d\n",
__func__, skb, txq, skb_queue_len(&txq->sk_list), txq->idx,
txq->sta->ps.active, txq->ps_id, txq->tid, txq->credits);
ecrnx_txq_drop_skb(txq, skb, ecrnx_hw, false);
if (txq->sta && txq->sta->ps.active) {
txq->sta->ps.pkt_ready[txq->ps_id]--;
if (txq->sta->ps.pkt_ready[txq->ps_id] == 0)
ecrnx_set_traffic_status(ecrnx_hw, txq->sta, false, txq->ps_id);
// drop packet during PS service period
if (txq->sta->ps.sp_cnt[txq->ps_id]) {
txq->sta->ps.sp_cnt[txq->ps_id] --;
if (txq->push_limit)
txq->push_limit--;
if (WARN(((txq->ps_id == UAPSD_ID) &&
(txq->sta->ps.sp_cnt[txq->ps_id] == 0)),
"Drop last packet of UAPSD service period")) {
// TODO: inform FW to end SP
}
}
trace_ps_drop(txq->sta);
}
}
if (skb_queue_empty(&txq->sk_list)) {
ecrnx_txq_del_from_hw_list(txq);
txq->pkt_sent = 0;
}
spin_unlock(&ecrnx_hw->tx_lock);
/* restart netdev queue if number no more queued buffer */
if (unlikely(txq->status & ECRNX_TXQ_NDEV_FLOW_CTRL) &&
skb_queue_empty(&txq->sk_list)) {
txq->status &= ~ECRNX_TXQ_NDEV_FLOW_CTRL;
netif_wake_subqueue(txq->ndev, txq->ndev_idx);
trace_txq_flowctrl_restart(txq);
}
return pkt_queued;
}
/**
* ecrnx_txq_drop_ap_vif_old_traffic - Drop pkt queued for too long in TXQs
* linked to an "AP" vif (AP, MESH, P2P_GO)
*
* @vif: Vif to process
* @return Whether there is still pkt queued in any TXQ.
*/
static bool ecrnx_txq_drop_ap_vif_old_traffic(struct ecrnx_vif *vif)
{
struct ecrnx_sta *sta;
unsigned long timeout = (vif->ap.bcn_interval * HZ * 3) >> 10;
bool pkt_queued = false;
bool pkt_dropped = false;
// Should never be needed but still check VIF queues
ecrnx_txq_drop_old_traffic(ecrnx_txq_vif_get(vif, NX_BCMC_TXQ_TYPE),
vif->ecrnx_hw, ECRNX_TXQ_MAX_QUEUE_JIFFIES, &pkt_dropped);
ecrnx_txq_drop_old_traffic(ecrnx_txq_vif_get(vif, NX_UNK_TXQ_TYPE),
vif->ecrnx_hw, ECRNX_TXQ_MAX_QUEUE_JIFFIES, &pkt_dropped);
list_for_each_entry(sta, &vif->ap.sta_list, list) {
struct ecrnx_txq *txq;
int tid;
foreach_sta_txq(sta, txq, tid, vif->ecrnx_hw) {
pkt_queued |= ecrnx_txq_drop_old_traffic(txq, vif->ecrnx_hw,
timeout * sta->listen_interval,
&pkt_dropped);
}
}
if (pkt_dropped) {
ecrnx_printk_warn("Dropped packet in BCMC/UNK queue. \n");
}
return pkt_queued;
}
/**
* ecrnx_txq_drop_sta_vif_old_traffic - Drop pkt queued for too long in TXQs
* linked to a "STA" vif. In theory this should not be required as there is no
* case where traffic can accumulate in a STA interface.
*
* @vif: Vif to process
* @return Whether there is still pkt queued in any TXQ.
*/
static bool ecrnx_txq_drop_sta_vif_old_traffic(struct ecrnx_vif *vif)
{
struct ecrnx_txq *txq;
bool pkt_queued = false, pkt_dropped = false;
int tid;
if (vif->tdls_status == TDLS_LINK_ACTIVE) {
txq = ecrnx_txq_vif_get(vif, NX_UNK_TXQ_TYPE);
pkt_queued |= ecrnx_txq_drop_old_traffic(txq, vif->ecrnx_hw,
ECRNX_TXQ_MAX_QUEUE_JIFFIES,
&pkt_dropped);
foreach_sta_txq(vif->sta.tdls_sta, txq, tid, vif->ecrnx_hw) {
pkt_queued |= ecrnx_txq_drop_old_traffic(txq, vif->ecrnx_hw,
ECRNX_TXQ_MAX_QUEUE_JIFFIES,
&pkt_dropped);
}
}
if (vif->sta.ap) {
foreach_sta_txq(vif->sta.ap, txq, tid, vif->ecrnx_hw) {
pkt_queued |= ecrnx_txq_drop_old_traffic(txq, vif->ecrnx_hw,
ECRNX_TXQ_MAX_QUEUE_JIFFIES,
&pkt_dropped);
}
}
if (pkt_dropped) {
ecrnx_printk_warn("Dropped packet in STA interface TXQs. \n");
}
return pkt_queued;
}
/**
* ecrnx_txq_cleanup_timer_cb - callack for TXQ cleaup timer
* Used to prevent pkt to accumulate in TXQ. The main use case is for AP
* interface with client in Power Save mode but just in case all TXQs are
* checked.
*
* @t: timer structure
*/
static void ecrnx_txq_cleanup_timer_cb(struct timer_list *t)
{
struct ecrnx_hw *ecrnx_hw = from_timer(ecrnx_hw, t, txq_cleanup);
struct ecrnx_vif *vif;
bool pkt_queue = false;
list_for_each_entry(vif, &ecrnx_hw->vifs, list) {
switch (ECRNX_VIF_TYPE(vif)) {
case NL80211_IFTYPE_AP:
case NL80211_IFTYPE_P2P_GO:
case NL80211_IFTYPE_MESH_POINT:
pkt_queue |= ecrnx_txq_drop_ap_vif_old_traffic(vif);
break;
case NL80211_IFTYPE_STATION:
case NL80211_IFTYPE_P2P_CLIENT:
pkt_queue |= ecrnx_txq_drop_sta_vif_old_traffic(vif);
break;
case NL80211_IFTYPE_AP_VLAN:
case NL80211_IFTYPE_MONITOR:
default:
continue;
}
}
if (pkt_queue)
mod_timer(t, jiffies + ECRNX_TXQ_CLEANUP_INTERVAL);
}
/**
* ecrnx_txq_start_cleanup_timer - Start 'cleanup' timer if not started
*
* @ecrnx_hw: Driver main data
*/
void ecrnx_txq_start_cleanup_timer(struct ecrnx_hw *ecrnx_hw, struct ecrnx_sta *sta)
{
if (sta && !is_multicast_sta(sta->sta_idx) &&
!timer_pending(&ecrnx_hw->txq_cleanup))
mod_timer(&ecrnx_hw->txq_cleanup, jiffies + ECRNX_TXQ_CLEANUP_INTERVAL);
}
/**
* ecrnx_txq_prepare - Global initialization of txq
*
* @ecrnx_hw: Driver main data
*/
void ecrnx_txq_prepare(struct ecrnx_hw *ecrnx_hw)
{
int i;
for (i = 0; i < NX_NB_TXQ; i++) {
ecrnx_hw->txq[i].idx = TXQ_INACTIVE;
}
timer_setup(&ecrnx_hw->txq_cleanup, ecrnx_txq_cleanup_timer_cb, 0);
}
/******************************************************************************
* Start/Stop functions
*****************************************************************************/
/**
* ecrnx_txq_add_to_hw_list - Add TX queue to a HW queue schedule list.
*
* @txq: TX queue to add
*
* Add the TX queue if not already present in the HW queue list.
* To be called with tx_lock hold
*/
void ecrnx_txq_add_to_hw_list(struct ecrnx_txq *txq)
{
if (!(txq->status & ECRNX_TXQ_IN_HWQ_LIST)) {
trace_txq_add_to_hw(txq);
txq->status |= ECRNX_TXQ_IN_HWQ_LIST;
list_add_tail(&txq->sched_list, &txq->hwq->list);
txq->hwq->need_processing = true;
}
}
/**
* ecrnx_txq_del_from_hw_list - Delete TX queue from a HW queue schedule list.
*
* @txq: TX queue to delete
*
* Remove the TX queue from the HW queue list if present.
* To be called with tx_lock hold
*/
void ecrnx_txq_del_from_hw_list(struct ecrnx_txq *txq)
{
if (txq->status & ECRNX_TXQ_IN_HWQ_LIST) {
trace_txq_del_from_hw(txq);
txq->status &= ~ECRNX_TXQ_IN_HWQ_LIST;
list_del(&txq->sched_list);
}
}
/**
* ecrnx_txq_skb_ready - Check if skb are available for the txq
*
* @txq: Pointer on txq
* @return True if there are buffer ready to be pushed on this txq,
* false otherwise
*/
static inline bool ecrnx_txq_skb_ready(struct ecrnx_txq *txq)
{
#ifdef CONFIG_MAC80211_TXQ
if (txq->nb_ready_mac80211 != NOT_MAC80211_TXQ)
return ((txq->nb_ready_mac80211 > 0) || !skb_queue_empty(&txq->sk_list));
else
#endif
return !skb_queue_empty(&txq->sk_list);
}
/**
* ecrnx_txq_start - Try to Start one TX queue
*
* @txq: TX queue to start
* @reason: reason why the TX queue is started (among ECRNX_TXQ_STOP_xxx)
*
* Re-start the TX queue for one reason.
* If after this the txq is no longer stopped and some buffers are ready,
* the TX queue is also added to HW queue list.
* To be called with tx_lock hold
*/
void ecrnx_txq_start(struct ecrnx_txq *txq, u16 reason)
{
BUG_ON(txq==NULL);
if (txq->idx != TXQ_INACTIVE && (txq->status & reason))
{
trace_txq_start(txq, reason);
txq->status &= ~reason;
if (!ecrnx_txq_is_stopped(txq) && ecrnx_txq_skb_ready(txq))
ecrnx_txq_add_to_hw_list(txq);
}
}
/**
* ecrnx_txq_stop - Stop one TX queue
*
* @txq: TX queue to stop
* @reason: reason why the TX queue is stopped (among ECRNX_TXQ_STOP_xxx)
*
* Stop the TX queue. It will remove the TX queue from HW queue list
* To be called with tx_lock hold
*/
void ecrnx_txq_stop(struct ecrnx_txq *txq, u16 reason)
{
BUG_ON(txq==NULL);
if (txq->idx != TXQ_INACTIVE)
{
trace_txq_stop(txq, reason);
txq->status |= reason;
ecrnx_txq_del_from_hw_list(txq);
}
}
/**
* ecrnx_txq_sta_start - Start all the TX queue linked to a STA
*
* @sta: STA whose TX queues must be re-started
* @reason: Reason why the TX queue are restarted (among ECRNX_TXQ_STOP_xxx)
* @ecrnx_hw: Driver main data
*
* This function will re-start all the TX queues of the STA for the reason
* specified. It can be :
* - ECRNX_TXQ_STOP_STA_PS: the STA is no longer in power save mode
* - ECRNX_TXQ_STOP_VIF_PS: the VIF is in power save mode (p2p absence)
* - ECRNX_TXQ_STOP_CHAN: the STA's VIF is now on the current active channel
*
* Any TX queue with buffer ready and not Stopped for other reasons, will be
* added to the HW queue list
* To be called with tx_lock hold
*/
void ecrnx_txq_sta_start(struct ecrnx_sta *ecrnx_sta, u16 reason,
struct ecrnx_hw *ecrnx_hw)
{
struct ecrnx_txq *txq;
int tid;
trace_txq_sta_start(ecrnx_sta->sta_idx);
ecrnx_printk_tx("%s-%d:ecrnx_txq_stop,reaosn:0x%x,sta:0x%08x,sta_index:0x%08x \n", __func__, __LINE__, reason, ecrnx_sta, ecrnx_sta->sta_idx);
foreach_sta_txq(ecrnx_sta, txq, tid, ecrnx_hw) {
ecrnx_txq_start(txq, reason);
if (txq->idx != TXQ_INACTIVE && !skb_queue_empty(&txq->sk_list))
{
ecrnx_hwq_process(ecrnx_hw, txq->hwq);
}
}
}
/**
* ecrnx_stop_sta_txq - Stop all the TX queue linked to a STA
*
* @sta: STA whose TX queues must be stopped
* @reason: Reason why the TX queue are stopped (among ECRNX_TX_STOP_xxx)
* @ecrnx_hw: Driver main data
*
* This function will stop all the TX queues of the STA for the reason
* specified. It can be :
* - ECRNX_TXQ_STOP_STA_PS: the STA is in power save mode
* - ECRNX_TXQ_STOP_VIF_PS: the VIF is in power save mode (p2p absence)
* - ECRNX_TXQ_STOP_CHAN: the STA's VIF is not on the current active channel
*
* Any TX queue present in a HW queue list will be removed from this list.
* To be called with tx_lock hold
*/
void ecrnx_txq_sta_stop(struct ecrnx_sta *ecrnx_sta, u16 reason,
struct ecrnx_hw *ecrnx_hw)
{
struct ecrnx_txq *txq;
int tid;
if (!ecrnx_sta)
return;
trace_txq_sta_stop(ecrnx_sta->sta_idx);
foreach_sta_txq(ecrnx_sta, txq, tid, ecrnx_hw) {
ecrnx_printk_tx("%s-%d:stop_reaosn:0x%x,sta:0x%08x,sta_index:0x%08x ,txq:0x%p,tid:%d \n", __func__, __LINE__, reason, ecrnx_sta, ecrnx_sta->sta_idx, txq, tid);
ecrnx_txq_stop(txq, reason);
}
}
void ecrnx_txq_tdls_sta_start(struct ecrnx_vif *ecrnx_vif, u16 reason,
struct ecrnx_hw *ecrnx_hw)
{
trace_txq_vif_start(ecrnx_vif->vif_index);
spin_lock_bh(&ecrnx_hw->tx_lock);
if (ecrnx_vif->sta.tdls_sta)
ecrnx_txq_sta_start(ecrnx_vif->sta.tdls_sta, reason, ecrnx_hw);
spin_unlock_bh(&ecrnx_hw->tx_lock);
}
void ecrnx_txq_tdls_sta_stop(struct ecrnx_vif *ecrnx_vif, u16 reason,
struct ecrnx_hw *ecrnx_hw)
{
trace_txq_vif_stop(ecrnx_vif->vif_index);
spin_lock_bh(&ecrnx_hw->tx_lock);
if (ecrnx_vif->sta.tdls_sta)
ecrnx_txq_sta_stop(ecrnx_vif->sta.tdls_sta, reason, ecrnx_hw);
spin_unlock_bh(&ecrnx_hw->tx_lock);
}
static inline
void ecrnx_txq_vif_for_each_sta(struct ecrnx_hw *ecrnx_hw, struct ecrnx_vif *ecrnx_vif,
void (*f)(struct ecrnx_sta *, u16, struct ecrnx_hw *),
u16 reason)
{
switch (ECRNX_VIF_TYPE(ecrnx_vif)) {
case NL80211_IFTYPE_STATION:
case NL80211_IFTYPE_P2P_CLIENT:
{
if (ecrnx_vif->tdls_status == TDLS_LINK_ACTIVE)
f(ecrnx_vif->sta.tdls_sta, reason, ecrnx_hw);
#ifdef CONFIG_ECRNX_P2P
if (!(ecrnx_vif->sta.ap == NULL))
#else
if (!WARN_ON(ecrnx_vif->sta.ap == NULL))
#endif
f(ecrnx_vif->sta.ap, reason, ecrnx_hw);
break;
}
case NL80211_IFTYPE_AP_VLAN:
{
ecrnx_vif = ecrnx_vif->ap_vlan.master;
struct ecrnx_sta *sta;
list_for_each_entry(sta, &ecrnx_vif->ap.sta_list, list) {
f(sta, reason, ecrnx_hw);
}
break;
}
case NL80211_IFTYPE_AP:
case NL80211_IFTYPE_MESH_POINT:
case NL80211_IFTYPE_P2P_GO:
{
struct ecrnx_sta *sta;
list_for_each_entry(sta, &ecrnx_vif->ap.sta_list, list) {
f(sta, reason, ecrnx_hw);
}
break;
}
default:
//BUG();
ecrnx_printk_err("%s %d\n", __func__,ECRNX_VIF_TYPE(ecrnx_vif));
break;
}
}
/**
* ecrnx_txq_vif_start - START TX queues of all STA associated to the vif
* and vif's TXQ
*
* @vif: Interface to start
* @reason: Start reason (ECRNX_TXQ_STOP_CHAN or ECRNX_TXQ_STOP_VIF_PS)
* @ecrnx_hw: Driver main data
*
* Iterate over all the STA associated to the vif and re-start them for the
* reason @reason
* Take tx_lock
*/
void ecrnx_txq_vif_start(struct ecrnx_vif *ecrnx_vif, u16 reason,
struct ecrnx_hw *ecrnx_hw)
{
struct ecrnx_txq *txq;
trace_txq_vif_start(ecrnx_vif->vif_index);
spin_lock_bh(&ecrnx_hw->tx_lock);
//Reject if monitor interface
if (ecrnx_vif->wdev.iftype == NL80211_IFTYPE_MONITOR)
goto end;
if (ecrnx_vif->roc_tdls && ecrnx_vif->sta.tdls_sta && ecrnx_vif->sta.tdls_sta->tdls.chsw_en) {
ecrnx_txq_sta_start(ecrnx_vif->sta.tdls_sta, reason, ecrnx_hw);
}
if (!ecrnx_vif->roc_tdls) {
ecrnx_txq_vif_for_each_sta(ecrnx_hw, ecrnx_vif, ecrnx_txq_sta_start, reason);
}
txq = ecrnx_txq_vif_get(ecrnx_vif, NX_BCMC_TXQ_TYPE);
ecrnx_txq_start(txq, reason);
txq = ecrnx_txq_vif_get(ecrnx_vif, NX_UNK_TXQ_TYPE);
ecrnx_txq_start(txq, reason);
end:
spin_unlock_bh(&ecrnx_hw->tx_lock);
}
/**
* ecrnx_txq_vif_stop - STOP TX queues of all STA associated to the vif
*
* @vif: Interface to stop
* @arg: Stop reason (ECRNX_TXQ_STOP_CHAN or ECRNX_TXQ_STOP_VIF_PS)
* @ecrnx_hw: Driver main data
*
* Iterate over all the STA associated to the vif and stop them for the
* reason ECRNX_TXQ_STOP_CHAN or ECRNX_TXQ_STOP_VIF_PS
* Take tx_lock
*/
void ecrnx_txq_vif_stop(struct ecrnx_vif *ecrnx_vif, u16 reason,
struct ecrnx_hw *ecrnx_hw)
{
struct ecrnx_txq *txq;
trace_txq_vif_stop(ecrnx_vif->vif_index);
spin_lock_bh(&ecrnx_hw->tx_lock);
//Reject if monitor interface
if (ecrnx_vif->wdev.iftype == NL80211_IFTYPE_MONITOR)
goto end;
ecrnx_txq_vif_for_each_sta(ecrnx_hw, ecrnx_vif, ecrnx_txq_sta_stop, reason);
txq = ecrnx_txq_vif_get(ecrnx_vif, NX_BCMC_TXQ_TYPE);
ecrnx_txq_stop(txq, reason);
txq = ecrnx_txq_vif_get(ecrnx_vif, NX_UNK_TXQ_TYPE);
ecrnx_txq_stop(txq, reason);
end:
spin_unlock_bh(&ecrnx_hw->tx_lock);
}
/**
* ecrnx_start_offchan_txq - START TX queue for offchannel frame
*
* @ecrnx_hw: Driver main data
*/
void ecrnx_txq_offchan_start(struct ecrnx_hw *ecrnx_hw)
{
struct ecrnx_txq *txq;
txq = &ecrnx_hw->txq[NX_OFF_CHAN_TXQ_IDX];
spin_lock_bh(&ecrnx_hw->tx_lock);
ecrnx_txq_start(txq, ECRNX_TXQ_STOP_CHAN);
spin_unlock_bh(&ecrnx_hw->tx_lock);
ecrnx_printk_tx("%s-%d:ecrnx_txq_start,reaosn:0x%x \n", __func__, __LINE__, ECRNX_TXQ_STOP_CHAN);
}
/**
* ecrnx_switch_vif_sta_txq - Associate TXQ linked to a STA to a new vif
*
* @sta: STA whose txq must be switched
* @old_vif: Vif currently associated to the STA (may no longer be active)
* @new_vif: vif which should be associated to the STA for now on
*
* This function will switch the vif (i.e. the netdev) associated to all STA's
* TXQ. This is used when AP_VLAN interface are created.
* If one STA is associated to an AP_vlan vif, it will be moved from the master
* AP vif to the AP_vlan vif.
* If an AP_vlan vif is removed, then STA will be moved back to mastert AP vif.
*
*/
void ecrnx_txq_sta_switch_vif(struct ecrnx_sta *sta, struct ecrnx_vif *old_vif,
struct ecrnx_vif *new_vif)
{
struct ecrnx_hw *ecrnx_hw = new_vif->ecrnx_hw;
struct ecrnx_txq *txq;
int i;
/* start TXQ on the new interface, and update ndev field in txq */
if (!netif_carrier_ok(new_vif->ndev))
netif_carrier_on(new_vif->ndev);
txq = ecrnx_txq_sta_get(sta, 0, ecrnx_hw);
for (i = 0; i < NX_NB_TID_PER_STA; i++, txq++) {
txq->ndev = new_vif->ndev;
netif_wake_subqueue(txq->ndev, txq->ndev_idx);
}
}
/******************************************************************************
* TXQ queue/schedule functions
*****************************************************************************/
/**
* ecrnx_txq_queue_skb - Queue a buffer in a TX queue
*
* @skb: Buffer to queue
* @txq: TX Queue in which the buffer must be added
* @ecrnx_hw: Driver main data
* @retry: Should it be queued in the retry list
*
* @return: Retrun 1 if txq has been added to hwq list, 0 otherwise
*
* Add a buffer in the buffer list of the TX queue
* and add this TX queue in the HW queue list if the txq is not stopped.
* If this is a retry packet it is added after the last retry packet or at the
* beginning if there is no retry packet queued.
*
* If the STA is in PS mode and this is the first packet queued for this txq
* update TIM.
*
* To be called with tx_lock hold
*/
int ecrnx_txq_queue_skb(struct sk_buff *skb, struct ecrnx_txq *txq,
struct ecrnx_hw *ecrnx_hw, bool retry,
struct sk_buff *skb_prev)
{
if (unlikely(txq->sta && txq->sta->ps.active)) {
txq->sta->ps.pkt_ready[txq->ps_id]++;
trace_ps_queue(txq->sta);
if (txq->sta->ps.pkt_ready[txq->ps_id] == 1) {
ecrnx_set_traffic_status(ecrnx_hw, txq->sta, true, txq->ps_id);
}
}
if (!retry) {
/* add buffer in the sk_list */
if (skb_prev)