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qcacld-3.0: Trim ACS scan freq list based on last scan ageout time

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If particular channel's last scan time is less than the last_scan_ageout
threshold, skip that channel from ACS scan frequency list.

This change optimises the ACS scan time by reducing the number of
channels in ACS scan request to firmware.

Change-Id: Id81815035a89039ef1f492a622c5d89cb4aa298e
CRs-Fixed: 3239387
This commit is contained in:
Surabhi Vishnoi
2022-06-16 16:42:00 +05:30
committed by Madan Koyyalamudi
parent 8b2fa9fc04
commit a6e1be96f5
2 changed files with 75 additions and 0 deletions
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74
core/sap/src/sap_fsm.c
View File

@@ -1203,6 +1203,59 @@ validation_done:
return QDF_STATUS_SUCCESS;
}
#ifdef WLAN_FEATURE_SAP_ACS_OPTIMIZE
/**
* sap_acs_scan_freq_list_optimize - optimize the ACS scan freq list based
* on when last scan was performed on particular frequency. If last scan
* performed on particular frequency is less than configured last_scan_ageout
* time, then skip that frequency from ACS scan freq list.
*
* sap_ctx: sap context
* list: ACS scan frequency list
* ch_count: number of frequency in list
*
* Return: None
*/
static void sap_acs_scan_freq_list_optimize(struct sap_context *sap_ctx,
struct chan_list *list,
uint8_t *ch_count)
{
int loop_count = 0, j = 0;
uint32_t ts_last_scan;
sap_ctx->partial_acs_scan = false;
while (loop_count < *ch_count) {
ts_last_scan = scm_get_last_scan_time_per_channel(
sap_ctx->vdev, list->chan[loop_count].freq);
if (qdf_system_time_before(
qdf_get_time_of_the_day_ms(),
ts_last_scan + sap_ctx->acs_cfg->last_scan_ageout_time)) {
sap_info("ACS chan %d skipped from scan as last scan ts %d\n",
list->chan[loop_count].freq,
qdf_get_time_of_the_day_ms() - ts_last_scan);
for (j = loop_count; j < *ch_count - 1; j++)
list->chan[j].freq = list->chan[j + 1].freq;
(*ch_count)--;
sap_ctx->partial_acs_scan = true;
continue;
}
loop_count++;
}
if (*ch_count == 0)
sap_info("All ACS freq channels are scanned recently, skip ACS scan\n");
}
#else
static void sap_acs_scan_freq_list_optimize(struct sap_context *sap_ctx,
struct chan_list *list,
uint8_t *ch_count)
{
}
#endif
QDF_STATUS sap_channel_sel(struct sap_context *sap_context)
{
QDF_STATUS qdf_ret_status;
@@ -1312,6 +1365,26 @@ QDF_STATUS sap_channel_sel(struct sap_context *sap_context)
sap_context->num_of_channel = num_of_channels;
/* Set requestType to Full scan */
/*
* send partial channels to be scanned in SCAN request if
* vendor command included last scan ageout time to be used to
* optimize the SAP bring up time
*/
if (sap_context->acs_cfg->last_scan_ageout_time)
sap_acs_scan_freq_list_optimize(
sap_context, &req->scan_req.chan_list,
&req->scan_req.chan_list.num_chan);
if (!req->scan_req.chan_list.num_chan) {
sap_info("## SKIPPED ACS SCAN");
wlansap_pre_start_bss_acs_scan_callback(
mac_handle, sap_context, sap_context->sessionId,
0, eCSR_SCAN_SUCCESS);
qdf_mem_free(req);
qdf_ret_status = QDF_STATUS_SUCCESS;
goto release_vdev_ref;
}
sap_context->acs_req_timestamp = qdf_get_time_of_the_day_ms();
qdf_ret_status = wlan_scan_start(req);
if (qdf_ret_status != QDF_STATUS_SUCCESS) {
@@ -1340,6 +1413,7 @@ QDF_STATUS sap_channel_sel(struct sap_context *sap_context)
wlansap_dump_acs_ch_freq(sap_context);
host_log_acs_scan_start(scan_id, vdev_id);
}
#ifdef FEATURE_WLAN_AP_AP_ACS_OPTIMIZE
} else {
sap_context->acs_cfg->skip_scan_status = eSAP_SKIP_ACS_SCAN;

1
core/sap/src/sap_internal.h
View File

@@ -242,6 +242,7 @@ struct sap_context {
uint32_t restriction_mask;
#endif
bool require_h2e;
bool partial_acs_scan;
};
/*----------------------------------------------------------------------------