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ath6kl: assign Tx packet drop threshold per endpoint based on AC priority 

Tx packets will begin to drop when there are multiple traffic priorities
and the current traffic is not the highest priority and the remaining
cookies drop below a certain number, which is fixed for all AC. It is
possilbe that lower priority AC have more traffic which will consume
more cookies and lock out higher priority AC from having any. Assign
each endpoint (AC) with a different Tx-packet-drop threshold so lower
priority AC is more likely to drop packets and the cookies become more
available to higher priority AC.

Signed-off-by: Chilam Ng <chilamng@qca.qualcomm.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
This commit is contained in:
Chilam Ng 2012-02-09 02:17:01 -08:00 committed by Kalle Valo
parent d0ff7383a3
commit 0ea10f2b46
3 changed files with 12 additions and 1 deletions
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9
drivers/net/wireless/ath/ath6kl/htc.c
View File

@ -2483,6 +2483,15 @@ int ath6kl_htc_conn_service(struct htc_target *target,
endpoint->cred_dist.endpoint = assigned_ep;
endpoint->cred_dist.cred_sz = target->tgt_cred_sz;
switch (endpoint->svc_id) {
case WMI_DATA_BK_SVC:
endpoint->tx_drop_packet_threshold = MAX_DEF_COOKIE_NUM / 3;
break;
default:
endpoint->tx_drop_packet_threshold = MAX_HI_COOKIE_NUM;
break;
}
if (conn_req->max_rxmsg_sz) {
/*
* Override cred_per_msg calculation, this optimizes

1
drivers/net/wireless/ath/ath6kl/htc.h
View File

@ -501,6 +501,7 @@ struct htc_endpoint {
u8 seqno;
u32 conn_flags;
struct htc_endpoint_stats ep_st;
u16 tx_drop_packet_threshold;
};
struct htc_control_buffer {

3
drivers/net/wireless/ath/ath6kl/txrx.c
View File

@ -594,7 +594,8 @@ enum htc_send_full_action ath6kl_tx_queue_full(struct htc_target *target,
*/
if (ar->ac_stream_pri_map[ar->ep2ac_map[endpoint]] <
ar->hiac_stream_active_pri &&
ar->cookie_count <= MAX_HI_COOKIE_NUM)
ar->cookie_count <=
target->endpoint[endpoint].tx_drop_packet_threshold)
/*
* Give preference to the highest priority stream by
* dropping the packets which overflowed.