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wifi: ath12k: flush all packets before suspend

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In order to send out all packets before going to suspend, current code
adds a 500ms delay as a workaround. It is a rough estimate and may not
work.

Fix this by checking packet counters, if counters become zero, then all
packets are sent out or dropped.

Tested-on: WCN7850 hw2.0 PCI WLAN.HMT.1.0-03427-QCAHMTSWPL_V1.0_V2.0_SILICONZ-1.15378.4
Tested-on: QCN9274 hw2.0 PCI WLAN.WBE.1.0.1-00029-QCAHKSWPL_SILICONZ-1

Signed-off-by: Baochen Qiang <quic_bqiang@quicinc.com>
Signed-off-by: Kalle Valo <quic_kvalo@quicinc.com>
Link: https://msgid.link/20240412060620.27519-7-quic_bqiang@quicinc.com
This commit is contained in:
Baochen Qiang 2024-04-22 15:11:45 +03:00 • committed by Kalle Valo
parent 7b3d4eb283
commit 692921ead8
3 changed files with 38 additions and 11 deletions
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20
drivers/net/wireless/ath/ath12k/core.c
View file

@ -44,15 +44,25 @@ static int ath12k_core_rfkill_config(struct ath12k_base *ab)
int ath12k_core_suspend(struct ath12k_base *ab)
{
int ret;
struct ath12k *ar;
int ret, i;
if (!ab->hw_params->supports_suspend)
return -EOPNOTSUPP;
/* TODO: there can frames in queues so for now add delay as a hack.
* Need to implement to handle and remove this delay.
*/
msleep(500);
rcu_read_lock();
for (i = 0; i < ab->num_radios; i++) {
ar = ath12k_mac_get_ar_by_pdev_id(ab, i);
if (!ar)
continue;
ret = ath12k_mac_wait_tx_complete(ar);
if (ret) {
ath12k_warn(ab, "failed to wait tx complete: %d\n", ret);
rcu_read_unlock();
return ret;
}
}
rcu_read_unlock();
ret = ath12k_dp_rx_pktlog_stop(ab, true);
if (ret) {

28
drivers/net/wireless/ath/ath12k/mac.c
View file

@ -7417,22 +7417,38 @@ static int ath12k_mac_op_set_frag_threshold(struct ieee80211_hw *hw, u32 value)
return -EOPNOTSUPP;
}
static void ath12k_mac_flush(struct ath12k *ar)
static int ath12k_mac_flush(struct ath12k *ar)
{
long time_left;
int ret = 0;
time_left = wait_event_timeout(ar->dp.tx_empty_waitq,
(atomic_read(&ar->dp.num_tx_pending) == 0),
ATH12K_FLUSH_TIMEOUT);
if (time_left == 0)
ath12k_warn(ar->ab, "failed to flush transmit queue %ld\n", time_left);
if (time_left == 0) {
ath12k_warn(ar->ab,
"failed to flush transmit queue, data pkts pending %d\n",
atomic_read(&ar->dp.num_tx_pending));
ret = -ETIMEDOUT;
}
time_left = wait_event_timeout(ar->txmgmt_empty_waitq,
(atomic_read(&ar->num_pending_mgmt_tx) == 0),
ATH12K_FLUSH_TIMEOUT);
if (time_left == 0)
ath12k_warn(ar->ab, "failed to flush mgmt transmit queue %ld\n",
time_left);
if (time_left == 0) {
ath12k_warn(ar->ab,
"failed to flush mgmt transmit queue, mgmt pkts pending %d\n",
atomic_read(&ar->num_pending_mgmt_tx));
ret = -ETIMEDOUT;
}
return ret;
}
int ath12k_mac_wait_tx_complete(struct ath12k *ar)
{
ath12k_mac_drain_tx(ar);
return ath12k_mac_flush(ar);
}
static void ath12k_mac_op_flush(struct ieee80211_hw *hw, struct ieee80211_vif *vif,

1
drivers/net/wireless/ath/ath12k/mac.h
View file

@ -78,4 +78,5 @@ enum ath12k_supported_bw ath12k_mac_mac80211_bw_to_ath12k_bw(enum rate_info_bw b
enum hal_encrypt_type ath12k_dp_tx_get_encrypt_type(u32 cipher);
int ath12k_mac_rfkill_enable_radio(struct ath12k *ar, bool enable);
int ath12k_mac_rfkill_config(struct ath12k *ar);
int ath12k_mac_wait_tx_complete(struct ath12k *ar);
#endif