hw-mgmt: scripts: Restore asic chipup status on restart

On the SPC1/SPC2 platforms with single asic that uses minimal
driver, when the hw-mgmt service is restarted, asic chipup
status is not restored. This is because 'systemctl restart'
calls stop and start of hw-mgmt. The asic chipup is performed
only when the 'hw-management.sh chipup' is called explicitly.
When the asic was instantiated before doing a hw-mgmt restart,
as part of do_stop, asic chip down is performed and it will
not be instantiated back after do_start.

This patch adds the support for restoring the asic chipup
status on hw-mgmt restarts.

Bugs #4662187

Signed-off-by: Ciju Rajan K <crajank@nvidia.com>

Author: ciju-nvidia

usr/usr/bin/hw-management-helpers.sh

@@ -81,6 +81,7 @@ vm_sku=`cat $sku_file`
 vm_vpd_path="/etc/hw-management-virtual/$vm_sku"
 cpldreg_log_file=/var/log/hw-mgmt-cpldreg.log
 fixup_hook_script=/usr/local/bin/hw-management-fixup.sh
+asic_chipup_status=/run/.asic_chipup_completed
 
 declare -A psu_fandir_vs_pn=(["00KX1W"]=R ["00MP582"]=F ["00MP592"]=R ["00WT061"]=F \
 ["00WT062"]=R ["00WT199"]=F ["01FT674"]=F ["01FT691"]=F ["01LL976"]=F \
@@ -1037,3 +1038,16 @@ run_fixup_script()
 		echo $status > ${config_path}/fixup-status-${stage}
 	fi
 }
+
+check_asic_chipup_status()
+{
+	local chipup_status=0
+
+	if [ -f "$asic_chipup_status" ]; then
+		chipup_status=$(< "$asic_chipup_status")
+		if [ $chipup_status -eq 1 ]; then
+			return 0
+		fi
+	fi
+	return 1
+}

usr/usr/bin/hw-management.sh

@@ -3951,9 +3951,17 @@ case $ACTION in
 			exit 0
 		fi
 		do_start
+		# In SPC1/SPC2 switches that uses minimal driver, re-storing the state
+		# of asic chipup for the restart scenario.
+		check_asic_chipup_status && do_chip_up_down 1 1
 	;;
 	stop)
 		if [ -d /var/run/hw-management ]; then
+			# In SPC1/SPC2 switches that uses minimal driver, storing the state
+			# of asic chipup for the restart scenario.
+			if [ -f "$config_path/asic_chipup_completed" ]; then
+				cp "$config_path/asic_chipup_completed" $asic_chipup_status
+			fi
 			echo 1 > $config_path/stopping
 			if [ ! -f "$config_path/asic_num" ]; then
 				asic_num=1
@@ -4035,6 +4043,9 @@ case $ACTION in
 		do_stop
 		sleep 3
 		do_start
+		# In SPC1/SPC2 switches that uses minimal driver, re-storing the state
+		# of asic chipup for the restart scenario.
+		check_asic_chipup_status && do_chip_up_down 1 1
 	;;
 	reset-cause)
 		for f in $system_path/reset_*;