Add MwifiexFirmwareRecovery experiment in wifi.py
This experiment will enable a debug flag firmware_recover in mwifiex
so that it will attempt a reset when it does not respond under certain
conditions.
See b/31916833
Change-Id: Iceb5a6f495c0343ef3a561a0d819a5b34173160d
diff --git a/wifi/configs.py b/wifi/configs.py
index 240dd63..4dcdaab 100644
--- a/wifi/configs.py
+++ b/wifi/configs.py
@@ -23,6 +23,7 @@
'WifiShortAggTimeout',
'WifiNoAggTimeout',
'WifiNoAliveMonitor',
+ 'MwifiexFirmwareRecovery',
]
for _i in EXPERIMENTS:
experiment.register(_i)
diff --git a/wifi/mwifiex.py b/wifi/mwifiex.py
new file mode 100755
index 0000000..8cad3ac
--- /dev/null
+++ b/wifi/mwifiex.py
@@ -0,0 +1,23 @@
+#!/usr/bin/python -S
+
+"""Special handling for mwifiex driver.
+
+ The mwifiex driver has a mechanism to detect when the firmware is
+ stuck and attempt a reset. It is disabled by default and can be
+ configured with this helper.
+"""
+import glob
+import utils
+
+_MWIFIEX_SYS_RECOVERY = '/sys/kernel/debug/mwifiex/*/firmware_recover'
+
+
+def set_recovery(recovery_flag):
+ # Marvell's firmware can get into a non-recovery state
+ # that hangs forever. The driver can detect this state and perform a
+ # a reset when enabled with a debug flag, which is done here when the
+ # corresponding experiment is active.
+ recovery_flag = int(recovery_flag)
+ for sys_path in glob.glob(_MWIFIEX_SYS_RECOVERY):
+ utils.log('mwifiex.py: set %r to %r.' % (sys_path, recovery_flag))
+ open(sys_path, 'w').write(str(recovery_flag))
diff --git a/wifi/wifi.py b/wifi/wifi.py
index a0aa84b..19e2d13 100755
--- a/wifi/wifi.py
+++ b/wifi/wifi.py
@@ -17,6 +17,7 @@
import configs
import experiment
import iw
+import mwifiex
import options
import persist
import qca9880_cal
@@ -252,6 +253,7 @@
# Check for calibration errors on ath10k.
qca9880_cal.qca8990_calibration()
+ mwifiex.set_recovery(experiment.enabled('MwifiexFirmwareRecovery'))
client_interface = iw.find_interface_from_phy(
phy, iw.INTERFACE_TYPE.client, opt.interface_suffix)
@@ -987,6 +989,8 @@
if band == '5' and quantenna.set_client_wifi(opt):
return True
+ mwifiex.set_recovery(experiment.enabled('MwifiexFirmwareRecovery'))
+
phy = iw.find_phy(band, 'auto')
if phy is None:
utils.log("Couldn't find phy for band %s", band)
