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ath10k: disable cpuidle during downloading firmware

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Downloading ath10k firmware needs a large number of IOs and
cpuidle's miss predictions make it worse. In the worst case,
resume time can be three times longer than the average on sdio.

This patch disables cpuidle during firmware downloading by
applying PM_QOS_CPU_DMA_LATENCY in ath10k_download_fw().

Tested-on: QCA9880
Tested-on: QCA6174 hw3.2 SDIO WLAN.RMH.4.4.1-00029

Signed-off-by: Ikjoon Jang <ikjn@chromium.org>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>
This commit is contained in:
Ikjoon Jang 2019-11-06 20:04:45 +02:00 committed by Kalle Valo
parent 402838a05d
commit 3b58d6a599
1 changed files with 10 additions and 2 deletions
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12
drivers/net/wireless/ath/ath10k/core.c
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@ -11,6 +11,7 @@
#include <linux/property.h>
#include <linux/dmi.h>
#include <linux/ctype.h>
#include <linux/pm_qos.h>
#include <asm/byteorder.h>
#include "core.h"
@ -1027,6 +1028,7 @@ static int ath10k_download_fw(struct ath10k *ar)
u32 address, data_len;
const void *data;
int ret;
struct pm_qos_request latency_qos;
address = ar->hw_params.patch_load_addr;
@ -1060,8 +1062,14 @@ static int ath10k_download_fw(struct ath10k *ar)
ret);
}
return ath10k_bmi_fast_download(ar, address,
data, data_len);
memset(&latency_qos, 0, sizeof(latency_qos));
pm_qos_add_request(&latency_qos, PM_QOS_CPU_DMA_LATENCY, 0);
ret = ath10k_bmi_fast_download(ar, address, data, data_len);
pm_qos_remove_request(&latency_qos);
return ret;
}
void ath10k_core_free_board_files(struct ath10k *ar)