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| author | Rajkumar Manoharan <rmanohar@qti.qualcomm.com> | 2016-09-02 19:46:09 +0300 |
|---|---|---|
| committer | Kalle Valo <kvalo@qca.qualcomm.com> | 2016-09-09 14:49:47 +0300 |
| commit | 3c97f5de1f282492335a6aec1f94b77f7f899b8c (patch) | |
| tree | 82ebf604a8ce1975f98b43ddb64e02c6a6d94ab2 /drivers/net/wireless/ath/ath10k/core.h | |
| parent | c39265f72ae6dbcb0367be808837e2f182095d15 (diff) | |
| download | linux-3c97f5de1f282492335a6aec1f94b77f7f899b8c.tar.xz | |
ath10k: implement NAPI support
Add NAPI support for rx and tx completion. NAPI poll is scheduled
from interrupt handler. The design is as below
- on interrupt
- schedule napi and mask interrupts
- on poll
- process all pipes (no actual Tx/Rx)
- process Rx within budget
- if quota exceeds budget reschedule napi poll by returning budget
- process Tx completions and update budget if necessary
- process Tx fetch indications (pull-push)
- push any other pending Tx (if possible)
- before resched or napi completion replenish htt rx ring buffer
- if work done < budget, complete napi poll and unmask interrupts
This change also get rid of two tasklets (intr_tq and txrx_compl_task).
Measured peak throughput with NAPI on IPQ4019 platform in controlled
environment. No noticeable reduction in throughput is seen and also
observed improvements in CPU usage. Approx. 15% CPU usage got reduced
in UDP uplink case.
DL: AP DUT Tx
UL: AP DUT Rx
IPQ4019 (avg. cpu usage %)
========
TOT +NAPI
=========== =============
TCP DL 644 Mbps (42%) 645 Mbps (36%)
TCP UL 673 Mbps (30%) 675 Mbps (26%)
UDP DL 682 Mbps (49%) 680 Mbps (49%)
UDP UL 720 Mbps (28%) 717 Mbps (11%)
Signed-off-by: Rajkumar Manoharan <rmanohar@qti.qualcomm.com>
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
Diffstat (limited to 'drivers/net/wireless/ath/ath10k/core.h')
| -rw-r--r-- | drivers/net/wireless/ath/ath10k/core.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/net/wireless/ath/ath10k/core.h b/drivers/net/wireless/ath/ath10k/core.h index b367e9cfcfd4..c22391394ad1 100644 --- a/drivers/net/wireless/ath/ath10k/core.h +++ b/drivers/net/wireless/ath/ath10k/core.h @@ -65,6 +65,10 @@ #define ATH10K_KEEPALIVE_MAX_IDLE 3895 #define ATH10K_KEEPALIVE_MAX_UNRESPONSIVE 3900 +/* NAPI poll budget */ +#define ATH10K_NAPI_BUDGET 64 +#define ATH10K_NAPI_QUOTA_LIMIT 60 + struct ath10k; enum ath10k_bus { @@ -954,6 +958,10 @@ struct ath10k { struct ath10k_thermal thermal; struct ath10k_wow wow; + /* NAPI */ + struct net_device napi_dev; + struct napi_struct napi; + /* must be last */ u8 drv_priv[0] __aligned(sizeof(void *)); }; |