flo: Accelerate boot by paralleling device enable

Some QCOM devices require sysfs to trigger boot/init which are blocking
the init process.
[    7.453205] init: Command 'write /sys/kernel/boot_adsp/boot 1' action=post-fs-data (/init.angler.rc:166) returned 0 took 271.936ms.
This CL is to put those slow to start devices in a
separate service and wait for the service to be done later on.

Bug: 32712851
Test: On device
Change-Id: Idd4e965f122cbc8421b443a41573d363112dfa50

device-common.mk

@@ -202,6 +202,10 @@ PRODUCT_PACKAGES += \
     ueventd.rc \
     ueventd.flo.rc
 
+PRODUCT_COPY_FILES += \
+    device/asus/flo/rootdir/etc/init.qcom.devwait.sh:$(TARGET_COPY_OUT_VENDOR)/bin/init.qcom.devwait.sh \
+    device/asus/flo/rootdir/etc/init.qcom.devstart.sh:$(TARGET_COPY_OUT_VENDOR)/bin/init.qcom.devstart.sh
+
 # Recorder
 PRODUCT_PACKAGES += \
     Recorder

rootdir/etc/init.flo.rc

@@ -40,12 +40,14 @@ on fs
     mount_all ./fstab.flo
     swapon_all ./fstab.flo
     restorecon_recursive /persist
-    write /sys/kernel/boot_adsp/boot 1
 
 on early-boot
     # set RLIMIT_MEMLOCK to 64MB
     setrlimit 8 67108864 67108864
 
+    # Busy loop to wait for devices booted by devstart_sh just in case device not ready
+    exec - root root system -- /vendor/bin/init.qcom.devwait.sh
+
 on boot
     #Create QMUX deamon socket area
     mkdir /dev/socket/qmux_radio 0770 radio radio
@@ -126,6 +128,9 @@ on boot
     # Wifi firmware reload path
     chown wifi wifi /sys/module/wlan/parameters/fwpath
 
+on post-fs
+    # Start devices by sysfs trigger
+    start devstart_sh
 
 # msm specific files that need to be created on /data
 on post-fs-data
@@ -342,7 +347,12 @@ service diag_mdlog /vendor/bin/diag_mdlog -s 100
     class late_start
     disabled
 
-
+service devstart_sh /vendor/bin/init.qcom.devstart.sh
+    class main
+    user root
+    group root system
+    disabled
+    oneshot
 
 # on property:gsm.sim.state=READY
 #    start diag_mdlog

rootdir/etc/init.qcom.devstart.sh

@@ -0,0 +1,4 @@
+#!/system/bin/sh
+
+echo 1 > /sys/kernel/boot_adsp/boot
+setprop sys.qcom.devup 1

rootdir/etc/init.qcom.devwait.sh

@@ -0,0 +1,8 @@
+#!/system/bin/sh
+
+up="`getprop sys.qcom.devup`"
+while [ "$up" != "1" ]
+do
+    sleep 0.1
+    up="`getprop sys.qcom.devup`"
+done

sepolicy/file.te

@@ -24,3 +24,6 @@ type persist_wifi_file, file_type;
 type sysfs_rmnet, fs_type, sysfs_type;
 type sysfs_mpdecision, fs_type, sysfs_type;
 type sysfs_surfaceflinger, fs_type, sysfs_type;
+
+#type for devstart
+type sysfs_audio, sysfs_type, fs_type;

sepolicy/file_contexts

@@ -131,6 +131,8 @@
 /system/vendor/bin/init\.flo\.wifi\.sh    u:object_r:conn_init_exec:s0
 /system/vendor/bin/irsc_util              u:object_r:irsc_util_exec:s0
 /system/vendor/bin/init\.flo\.bt\.sh      u:object_r:bluetooth_loader_exec:s0
+/system/vendor/bin/init\.qcom\.devstart\.sh            u:object_r:init-qcom-devstart-sh_exec:s0
+/system/vendor/bin/init\.qcom\.devwait\.sh             u:object_r:init-qcom-devwait-sh_exec:s0
 
 # Persist firmware filesystem
 /persist(/.*)?                    u:object_r:persist_file:s0
@@ -154,3 +156,6 @@
 # Sysfs files used by surfaceflinger
 /sys/devices/virtual/graphics/fb1/format_3d -- u:object_r:sysfs_surfaceflinger:s0
 /sys/devices/virtual/graphics/fb1/hpd       -- u:object_r:sysfs_surfaceflinger:s0
+
+# Sysfs entry for audio
+/sys/kernel/boot_adsp/boot         u:object_r:sysfs_audio:s0

sepolicy/init-devstart-sh.te

@@ -0,0 +1,15 @@
+type init-qcom-devstart-sh, domain;
+type init-qcom-devstart-sh_exec, exec_type, file_type;
+
+init_daemon_domain(init-qcom-devstart-sh)
+
+allow init-qcom-devstart-sh shell_exec:file rx_file_perms;
+
+# execute toybox/toolbox
+allow init-qcom-devstart-sh toolbox_exec:file rx_file_perms;
+
+# Set the sys.qcom.devup property
+set_prop(init-qcom-devstart-sh, system_prop)
+
+# Set boot_adsp and boot_slpi to 1
+allow init-qcom-devstart-sh sysfs_audio:file w_file_perms;

sepolicy/init-devwait-sh.te

@@ -0,0 +1,9 @@
+type init-qcom-devwait-sh, domain;
+type init-qcom-devwait-sh_exec, exec_type, file_type;
+
+init_daemon_domain(init-qcom-devwait-sh)
+
+allow init-qcom-devwait-sh shell_exec:file rx_file_perms;
+
+# execute toybox/toolbox
+allow init-qcom-devwait-sh toolbox_exec:file rx_file_perms;