xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

iwlwifi: mvm: Add support for Energy based scan (EBS)

Browse Source 
This patch enables Energy Based Scan (EBS) - intended to detect energy
on 5 GHz band channels. Passive scan on this band takes up to 2.64 sec
assuming 110mSec per-channel * 24 channels. EBS is designed to detect
energy on channels with intensive Wifi activity as well as those where
only beacons are transmitted. EBS completes sampling all channels within
shortest beacon frame transmission time. Total EBS duration is about 100
msec (typical beacon interval).
Detecting Wifi activity on 5 GHz band channels can significantly reduce
scan duration thus saving time and power. EBS failure reported by FW
disables EBS for current connection. It is re-enabled upon new
connection attempt on any WLAN interface.

Signed-off-by: Haim Dreyfuss <haim.dreyfuss@intel.com>
Signed-off-by: Alexander Bondar <alexander.bondar@intel.com>
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
This commit is contained in:
Haim Dreyfuss
2014-04-06 11:19:09 +03:00
committed by Emmanuel Grumbach
parent ae397472f6
commit e820c2da7e
6 changed files with 37 additions and 6 deletions
Download Patch File Download Diff File Expand all files Collapse all files

15
drivers/net/wireless/iwlwifi/mvm/scan.c
View File

@@ -570,9 +570,13 @@ int iwl_mvm_rx_scan_offload_complete_notif(struct iwl_mvm *mvm,
/* scan status must be locked for proper checking */
lockdep_assert_held(&mvm->mutex);
IWL_DEBUG_SCAN(mvm, "Scheduled scan completed, status %s\n",
IWL_DEBUG_SCAN(mvm,
"Scheduled scan completed, status %s EBS status %s:%d\n",
scan_notif->status == IWL_SCAN_OFFLOAD_COMPLETED ?
"completed" : "aborted");
"completed" : "aborted", scan_notif->ebs_status ==
IWL_SCAN_EBS_SUCCESS ? "success" : "failed",
scan_notif->ebs_status);
/* only call mac80211 completion if the stop was initiated by FW */
if (mvm->scan_status == IWL_MVM_SCAN_SCHED) {
@@ -580,6 +584,8 @@ int iwl_mvm_rx_scan_offload_complete_notif(struct iwl_mvm *mvm,
ieee80211_sched_scan_stopped(mvm->hw);
}
mvm->last_ebs_successful = !scan_notif->ebs_status;
return 0;
}
@@ -916,6 +922,11 @@ int iwl_mvm_sched_scan_start(struct iwl_mvm *mvm,
scan_req.flags |= cpu_to_le16(IWL_SCAN_OFFLOAD_FLAG_PASS_ALL);
}
if (mvm->last_ebs_successful &&
mvm->fw->ucode_capa.flags & IWL_UCODE_TLV_FLAGS_EBS_SUPPORT)
scan_req.flags |=
cpu_to_le16(IWL_SCAN_OFFLOAD_FLAG_EBS_ACCURATE_MODE);
return iwl_mvm_send_cmd_pdu(mvm, SCAN_OFFLOAD_REQUEST_CMD, CMD_SYNC,
sizeof(scan_req), &scan_req);
}