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qcacld-3.0: reduce the interval of cap-tsf timer

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qcacld-2.0 to qcacld-3.0 propagation

hdd_get_hosttime_from_targettime() will get wrong host time when
it's longer than WLAN_HDD_CAPTURE_TSF_INTERVAL_SEC from last
TSF-HOST update. To fix this, TSF-HOST should be updated in at most
WLAN_HDD_CAPTURE_TSF_INTERVAL_SEC, it couldn't be achieved if the
timer interval is also WLAN_HDD_CAPTURE_TSF_INTERVAL_SEC, due to
processing or scheduling delay. So deduct several seconds from
WLAN_HDD_CAPTURE_TSF_INTERVAL_SEC.

Change-Id: Icce41c74568370d98509a2ebe69ae62e99ad2ce8
CRs-Fixed: 2104915
This commit is contained in:
gaolez 2017-10-30 15:29:59 +08:00 • committed by nshrivas
commit c2b7208197
1 changed files with 18 additions and 4 deletions
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22
core/hdd/src/wlan_hdd_tsf.c
View file

@ -275,18 +275,19 @@ static enum hdd_tsf_op_result hdd_indicate_tsf_internal(
#ifdef WLAN_FEATURE_TSF_PLUS
/* unit for target time: us; host time: ns */
#define HOST_TO_TARGET_TIME_RATIO NSEC_PER_USEC
#define MAX_ALLOWED_DEVIATION_NS (20 * NSEC_PER_MSEC)
#define MAX_ALLOWED_DEVIATION_NS (100 * NSEC_PER_USEC)
#define MAX_CONTINUOUS_ERROR_CNT 3
/* to distinguish 32-bit overflow case, this inverval should:
* equal or less than (1/2 * OVERFLOW_INDICATOR32 us)
*/
#define WLAN_HDD_CAPTURE_TSF_INTERVAL_SEC 500
#define WLAN_HDD_CAPTURE_TSF_INTERVAL_SEC 10
#define WLAN_HDD_CAPTURE_TSF_INIT_INTERVAL_MS 100
#define NORMAL_INTERVAL_TARGET \
((int64_t)((int64_t)WLAN_HDD_CAPTURE_TSF_INTERVAL_SEC * \
NSEC_PER_SEC / HOST_TO_TARGET_TIME_RATIO))
#define OVERFLOW_INDICATOR32 (((int64_t)0x1) << 32)
#define CAP_TSF_TIMER_FIX_SEC 1
/**
* TS_STATUS - timestamp status
@ -467,8 +468,21 @@ static void hdd_update_timestamp(struct hdd_adapter *adapter,
hdd_info("ts-pair updated: target: %llu; host: %llu",
adapter->last_target_time,
adapter->last_host_time);
interval = WLAN_HDD_CAPTURE_TSF_INTERVAL_SEC *
MSEC_PER_SEC;
/*
* TSF-HOST need to be updated in at most
* WLAN_HDD_CAPTURE_TSF_INTERVAL_SEC, it couldn't be achieved
* if the timer interval is also
* WLAN_HDD_CAPTURE_TSF_INTERVAL_SEC, due to processing or
* schedule delay. So deduct several seconds from
* WLAN_HDD_CAPTURE_TSF_INTERVAL_SEC.
* Without this change, hdd_get_hosttime_from_targettime() will
* get wrong host time when it's longer than
* WLAN_HDD_CAPTURE_TSF_INTERVAL_SEC from last
* TSF-HOST update.
*/
interval = (WLAN_HDD_CAPTURE_TSF_INTERVAL_SEC -
CAP_TSF_TIMER_FIX_SEC) * MSEC_PER_SEC;
adapter->continuous_error_count = 0;
break;
case HDD_TS_STATUS_WAITING: