blueline: wifi bring-up ordering + stable MAC

WCN3990 wifi died at boot: udev autoloads ath10k_snoc before rmtfs +
tqftpserv serve the DSP firmware, the wifi firmware crashes (msa unmap
-22), the in-place retry wedges at HTT connect (-110), and no wlan
device exists for the whole boot (WIFI-HW 'missing'). Blacklist the
autoload; blueline-wifi-bringup.service loads it after those services
with a reload-on-wedge retry (a crashed WCN3990 only recovers by module
reinsert). Diagnosed and verified live on-device.

Firmware also provides no MAC, so every probe randomized it and DHCP
reservations could not hold: NM conf.d defaults wifi to
cloned-mac-address=stable (per-network, per-machine, reboot-stable).
Phone currently presents 02:42:c2:03:26:47 on Samaritan Solutions —
update the router reservation to that once.

blueline/wifi-bringup/blueline-wifi-bringup.service

@@ -0,0 +1,15 @@
+[Unit]
+Description=WCN3990 wifi bring-up after DSP firmware services
+# See blueline-wifi-defer.conf: ath10k_snoc is blacklisted from udev
+# autoload because probing before rmtfs + tqftpserv serve the DSP firmware
+# crashes the wifi firmware and wedges the driver for the whole boot.
+After=rmtfs.service tqftpserv.service
+Wants=rmtfs.service tqftpserv.service
+
+[Service]
+Type=oneshot
+RemainAfterExit=yes
+ExecStart=/usr/local/bin/blueline-wifi-bringup.sh
+
+[Install]
+WantedBy=multi-user.target

blueline/wifi-bringup/blueline-wifi-bringup.sh

@@ -0,0 +1,19 @@
+#!/bin/sh
+# Load ath10k_snoc once the DSP firmware path is ready, and recover a
+# crashed WCN3990 by full module reload — after a firmware crash the driver
+# does not recover in place (HTT connect times out until reinsert).
+set -u
+for attempt in 1 2 3; do
+    modprobe ath10k_snoc
+    i=0
+    while [ $i -lt 15 ]; do
+        [ -n "$(ls /sys/class/ieee80211/ 2>/dev/null)" ] && exit 0
+        sleep 1
+        i=$((i + 1))
+    done
+    echo "wifi attempt $attempt: no ieee80211 device, reloading module" >&2
+    modprobe -r ath10k_snoc 2>/dev/null
+    sleep 2
+done
+echo "wifi bring-up failed after 3 attempts" >&2
+exit 1

blueline/wifi-bringup/blueline-wifi-defer.conf

@@ -0,0 +1,8 @@
+# WCN3990 (ath10k_snoc) must not probe before the DSP firmware path is
+# serving: its firmware loads wlanmdsp.mbn via tqftpserv and board data via
+# rmtfs. When udev coldplug loads the module early, the firmware crashes
+# ("failed to unmap msa permissions: -22"), the retry wedges at HTT connect
+# (-110), and no wlan device ever registers. Blacklisting only disables the
+# udev alias autoload; blueline-wifi-bringup.service modprobes it explicitly
+# once the services are up.
+blacklist ath10k_snoc

blueline/wifi-bringup/blueline-wifi-mac.conf

@@ -0,0 +1,8 @@
+# WCN3990 firmware provides no MAC ("invalid MAC address; choosing random"),
+# so every probe gets a fresh random hardware address and DHCP reservations
+# never hold. Derive a stable per-connection MAC (hashed from machine-id +
+# SSID) so the phone presents the same address to the same network across
+# reboots. Update router reservations to the MAC this yields once.
+[connection-blueline-wifi-mac]
+match-device=type:wifi
+wifi.cloned-mac-address=stable