sync bmc time from ipmb host

This script runs at startup as systemd service.
It checks if the bmc time is in sync from NTP server.
otherwise it reads the host time via ipmb interface
and updates as bmc time.

This change was tested and verified in yosemitev2 and tiogapass
platforms.

Signed-off-by: Naveen Moses <naveen.mosess@hcl.com>
Change-Id: I8c937c16415b2dd05d05155facadc0bed797db07

3 files changed, 147 insertions, 0 deletions

diff --git a/meta-facebook/recipes-phosphor/datetime/phosphor-time-manager/bmc-set-time.service b/meta-facebook/recipes-phosphor/datetime/phosphor-time-manager/bmc-set-time.service
new file mode 100644
index 000000000..e148b535f
--- /dev/null
+++ b/meta-facebook/recipes-phosphor/datetime/phosphor-time-manager/bmc-set-time.service
@@ -0,0 +1,12 @@
+[Unit]
+Description= Sync time from host via ipmb
+Wants=ipmb.service xyz.openbmc_project.Network.service
+After=ipmb.service xyz.openbmc_project.Network.service
+
+[Service]
+Type=onshot
+ExecStart=/usr/libexec/set-bmc-time-from-host
+RemainAfterExit=no
+
+[Install]
+WantedBy=multi-user.target
diff --git a/meta-facebook/recipes-phosphor/datetime/phosphor-time-manager/set-bmc-time-from-host b/meta-facebook/recipes-phosphor/datetime/phosphor-time-manager/set-bmc-time-from-host
new file mode 100644
index 000000000..40b3b8cbc
--- /dev/null
+++ b/meta-facebook/recipes-phosphor/datetime/phosphor-time-manager/set-bmc-time-from-host
@@ -0,0 +1,116 @@
+#!/bin/bash
+#BMC set time from host
+set -e
+
+echo "set-bmc-time-from-host is started"
+# Sync BMC's date with one of the four servers
+
+HOST_INSTANCES="HOST_INSTANCES_SED_REPLACEMENT_VALUE"
+MAX_RETRY_LIMIT=6
+
+check_NTP_status()
+{
+  timedatectl show --property=NTPSynchronized --value
+}
+
+get_single_host_time()
+{
+    for (( retry=1; retry<=5; retry++ ))
+    do
+        #request the single host time via ipmb command
+        # which will be set as bmc time
+        # 0x01 - me channel | 0x0a - storage net fn | 0x00 - lun
+        # 0x48 - get SEL time
+        ipmi_cmd_output=$(busctl call xyz.openbmc_project.Ipmi.Channel.Ipmb \
+        "/xyz/openbmc_project/Ipmi/Channel/Ipmb" org.openbmc.Ipmb sendRequest \
+        yyyyay 0x01 0x0a 0x00 0x48 0)
+        ipmb_result=$?
+        if [ "$ipmb_result" == "0" ];then
+            sleep 1
+            break
+        fi
+    done
+
+    if [ "$retry" == "$MAX_RETRY_LIMIT" ];then
+        exit 1
+    fi
+
+    echo "$ipmi_cmd_output"
+
+}
+
+get_multi_host_datetime()
+{
+    ipmbAddr=$1
+    for (( retry=1; retry<=5; retry++ ))
+    do
+        #request the multihost host time via ipmb command
+        # which will be set as bmc time
+        # 0x38 - oem net fn | 0x00 - lun | 0x02 - request to bridge ic cmd
+        # 0x6 - length | IANA id 0x15 0xA0 0x0 |0x48 - get SEL time
+
+        ipmi_cmd_output=$(busctl call xyz.openbmc_project.Ipmi.Channel.Ipmb \
+        /xyz/openbmc_project/Ipmi/Channel/Ipmb org.openbmc.Ipmb sendRequest \
+         yyyyay "$ipmbAddr" 0x38 0 0x2 6 0x15 0xA0 0x0 0x1 0x28 0x48)
+        ipmb_result=$?
+        if [ $ipmb_result == 0 ];then
+            break
+        fi
+        sleep 1
+    done
+
+    echo "$ipmi_cmd_output"
+}
+sync_multi_host_datetime()
+{
+    for index in $HOST_INSTANCES
+    do
+        ipmb_addr=$(((index-1)*4))
+        # Use standard IPMI command 'SendRequest method' to read RTC time
+        echo "chosen ipmb addr : "$ipmb_addr
+        multi_host_time_result=$(get_multi_host_datetime $ipmb_addr)
+
+        if [[ $(echo "$multi_host_time_result" | awk '{ print NF }') -eq 18 ]];
+        then
+            echo "syncing up host " $index " date time with bmc..."
+            date -s @$((0x$(echo "$multi_host_time_result" | \
+            awk '{printf "%02x%02x%02x%02x",$18,$17,$16,$15}')))
+            sync
+            break
+        fi
+    done
+
+}
+sync_single_host_datetime()
+{
+    single_host_time_result=$(get_single_host_time)
+
+    if [[ $(echo "$single_host_time_result" | awk '{ print NF }') -eq 11 ]];
+    then
+        echo "Syncing up host date time with bmc..."
+        date -s @$((0x$(echo "$single_host_time_result" | \
+        awk '{printf "%02x%02x%02x%02x",$11,$10,$9,$8}')))
+        sync
+    fi
+
+}
+
+#wait for the NTP server start if available.
+sleep 60
+
+NTP_STATUS=$(check_NTP_status)
+
+echo "NTP status :""$NTP_STATUS"
+
+if [ "$NTP_STATUS" == "yes" ]; then
+    echo "NTP is running and system clock is in sync.skiping host time sync..."
+    exit 0
+fi
+
+if [ "$HOST_INSTANCES" == "0" ]; then
+    echo "single host instance"
+    sync_single_host_datetime
+else
+    echo "multiple host instance"
+    sync_multi_host_datetime
+fi
diff --git a/meta-facebook/recipes-phosphor/datetime/phosphor-time-manager_%.bbappend b/meta-facebook/recipes-phosphor/datetime/phosphor-time-manager_%.bbappend
new file mode 100644
index 000000000..97ea50d80
--- /dev/null
+++ b/meta-facebook/recipes-phosphor/datetime/phosphor-time-manager_%.bbappend
@@ -0,0 +1,19 @@
+FILESEXTRAPATHS:prepend := "${THISDIR}/${PN}:"
+
+SRC_URI:append:fb-withhost += "file://set-bmc-time-from-host"
+
+
+RDEPENDS:${PN}:append:fb-withhost += "bash"
+
+do_install:append:fb-withhost(){
+
+    # Store the bitbake variable OBMC_HOST_INSTANCES  inside time sync script as HOST_INSTANCES variable using sed.
+    sed -i -e "s,HOST_INSTANCES_SED_REPLACEMENT_VALUE,${OBMC_HOST_INSTANCES},g" ${WORKDIR}/set-bmc-time-from-host
+
+    install -d ${D}$/lib/systemd/system
+    install -m 0644 ${WORKDIR}/bmc-set-time.service  ${D}$/lib/systemd/system
+    install -d ${D}/usr/libexec
+    install -m 0777 ${WORKDIR}/set-bmc-time-from-host ${D}/usr/libexec
+}
+
+SYSTEMD_SERVICE:${PN}:fb-withhost += "bmc-set-time.service"