From 82dbc15a05125a812c140a3c8cff81c366482229 Mon Sep 17 00:00:00 2001
From: "Jason M. Bills" <jason.m.bills@linux.intel.com>
Date: Mon, 7 Dec 2020 13:45:20 -0800
Subject: Update to internal 0.26

Signed-off-by: Jason M. Bills <jason.m.bills@linux.intel.com>
---
 .../network/ncsi-monitor/check-for-host-in-reset   | 65 ++++++++++++++++++++++
 .../network/ncsi-monitor/ncsi-monitor.service      | 11 ++++
 2 files changed, 76 insertions(+)
 create mode 100755 meta-openbmc-mods/meta-common/recipes-network/network/ncsi-monitor/check-for-host-in-reset
 create mode 100644 meta-openbmc-mods/meta-common/recipes-network/network/ncsi-monitor/ncsi-monitor.service

(limited to 'meta-openbmc-mods/meta-common/recipes-network/network/ncsi-monitor')

diff --git a/meta-openbmc-mods/meta-common/recipes-network/network/ncsi-monitor/check-for-host-in-reset b/meta-openbmc-mods/meta-common/recipes-network/network/ncsi-monitor/check-for-host-in-reset
new file mode 100755
index 000000000..aa17aebf2
--- /dev/null
+++ b/meta-openbmc-mods/meta-common/recipes-network/network/ncsi-monitor/check-for-host-in-reset
@@ -0,0 +1,65 @@
+#!/bin/sh
+
+# PFR Boot Time Detection
+#
+# The Platform Firmware Recovery system is designed to confirm the server is
+# running valid images. The server boot process is controlled with a
+# programmable device. The programmable device prevents the system, and the
+# BMC from booting until after it has confirmed the firmware images match a
+# known checksum. Two reset controls are asserted while the checksum
+# calculation is being performed. One prevents the BMC from booting, the other
+# (RSMRST_N) prevents the main processors from leaving reset.
+#
+# If the BMC FW checksum is correct the BMC is allowed to boot.
+# If the BIOS checksum fails the BIOS is not allowed to boot.
+# In this condition the BMC will boot believing the NCSI NIC is functional.
+# This will not be the case when RMSRST_N is asserted. The BIOS will not
+# configure the shared NIC. The BMC will not be able to send or receive
+# network traffic via the shared NIC. This becomes a problem depending on how
+# the NCSI channel is configured.
+#
+# When the NCSI channel is configured using DHCP the BMC is unable to
+# communicate to a DHCP server. Unable to acquire a valid IP state, the NCSI
+# NIC is left DOWN.
+# The problem that occurs is when the NIC is configured with a static
+# address. The BMC is unable to determine the configuration state of the NCSI
+# NIC, and behaves as if everything is working. The problem is the network
+# routing table will, in most cases, be left in a state that prevents traffic
+# from being sent/received from the dedicated NIC. This prevents network
+# access to the BMC, which in turn leaves the system unrecoverable.
+#
+# The purpose of this script is to check for the assertion of the RSMRST_N
+# control at BMC boot time. It will perform this test once. In the event the
+# RSMRST_N is found to be asserted, the BMC will take the NCSI NIC down. No
+# logic for detecting the deassertion will be performed. Once the new image
+# for the BIOS has been transferred, and the checksum confirmed, the BMC will
+# be reset by the programmable device. The programmable device will confirm
+# the checksums, and release both the BMC and the BIOS to boot normally.
+#
+# Flow:
+# The service will be a one-shot that waits for the network.target, as is done
+# by BMCWeb.
+# During a normal boot the RSMRST_N will not be asserted, and this script will
+# not perform an action.
+# When RSMRST_N is asserted the NCSI channel will be given a link down
+# command. This regardless of static or DHCP configuration mode.
+
+GPIOFIND=/usr/bin/gpiofind
+GPIOGET=/usr/bin/gpioget
+RSMRST="RSMRST_N"
+
+# Read the assertion state from the RSMRST_N input
+function get_rsmrst_state {
+    local __resultVal=$1
+    local gpio_state=$($GPIOGET $($GPIOFIND "$RSMRST"))
+    eval $__resultVal="'$gpio_state'"
+    return 0
+}
+
+get_rsmrst_state rsmrst_val
+
+if [ "$rsmrst_val" -eq 0 ]
+then
+    echo "RSMRST_N is asserted, take eth1 down"
+    ip link set down dev eth1
+fi
diff --git a/meta-openbmc-mods/meta-common/recipes-network/network/ncsi-monitor/ncsi-monitor.service b/meta-openbmc-mods/meta-common/recipes-network/network/ncsi-monitor/ncsi-monitor.service
new file mode 100644
index 000000000..19554c94d
--- /dev/null
+++ b/meta-openbmc-mods/meta-common/recipes-network/network/ncsi-monitor/ncsi-monitor.service
@@ -0,0 +1,11 @@
+[Unit]
+Description=Check for host in reset
+After=multi-user.target
+
+[Service]
+Type=oneshot
+Restart=no
+ExecStart=/usr/bin/check-for-host-in-reset
+
+[Install]
+WantedBy=multi-user.target
-- 
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