sm6250-common: Initial variant handler libinit

* This libinit has been made to commonize device variants props handling

[dereference23: Adapt for Xiaomi SM6250]
Signed-off-by: Alexander Winkowski <dereference23@outlook.com>
Change-Id: Iab68ff451ab1d6e861fb4cda4ef07fad3123ecde

BoardConfigCommon.mk

@@ -29,3 +29,7 @@ TARGET_NO_BOOTLOADER := true
 DEVICE_FRAMEWORK_COMPATIBILITY_MATRIX_FILE := $(COMMON_PATH)/device_framework_matrix.xml
 DEVICE_MATRIX_FILE := $(COMMON_PATH)/compatibility_matrix.xml
 DEVICE_MANIFEST_FILE := $(COMMON_PATH)/manifest.xml
+
+# Init
+TARGET_INIT_VENDOR_LIB ?= //$(COMMON_PATH):init_xiaomi_atoll
+TARGET_RECOVERY_DEVICE_MODULES ?= init_xiaomi_atoll

libinit/Android.bp

@@ -0,0 +1,25 @@
+//
+// Copyright (C) 2021 The LineageOS Project
+//
+// SPDX-License-Identifier: Apache-2.0
+//
+
+cc_library_static {
+    name: "libinit_xiaomi_atoll",
+    srcs: [
+        "libinit_dalvik_heap.cpp",
+        "libinit_variant.cpp",
+        "libinit_utils.cpp",
+    ],
+    whole_static_libs: ["libbase"],
+    export_include_dirs: ["include"],
+    recovery_available: true,
+}
+
+cc_library_static {
+    name: "init_xiaomi_atoll",
+    srcs: ["init_xiaomi_atoll.cpp"],
+    whole_static_libs: ["libinit_xiaomi_atoll"],
+    include_dirs: ["system/core/init"],
+    recovery_available: true,
+}

libinit/include/libinit_dalvik_heap.h

@@ -0,0 +1,23 @@
+/*
+ * Copyright (C) 2021 The LineageOS Project
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#ifndef LIBINIT_DALVIK_HEAP_H
+#define LIBINIT_DALVIK_HEAP_H
+
+#include <string>
+
+typedef struct dalvik_heap_info {
+    std::string heapstartsize;
+    std::string heapgrowthlimit;
+    std::string heapsize;
+    std::string heapminfree;
+    std::string heapmaxfree;
+    std::string heaptargetutilization;
+} dalvik_heap_info_t;
+
+void set_dalvik_heap(void);
+
+#endif // LIBINIT_DALVIK_HEAP_H

libinit/include/libinit_utils.h

@@ -0,0 +1,16 @@
+/*
+ * Copyright (C) 2021 The LineageOS Project
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#ifndef LIBINIT_UTILS_H
+#define LIBINIT_UTILS_H
+
+#include <string>
+
+void property_override(std::string prop, std::string value, bool add = true);
+
+void set_ro_build_prop(const std::string &prop, const std::string &value, bool product = false);
+
+#endif // LIBINIT_UTILS_H

libinit/include/libinit_variant.h

@@ -0,0 +1,29 @@
+/*
+ * Copyright (C) 2021 The LineageOS Project
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#ifndef LIBINIT_VARIANT_H
+#define LIBINIT_VARIANT_H
+
+#include <string>
+#include <vector>
+
+typedef struct variant_info {
+    std::string hwc_value;
+
+    std::string brand;
+    std::string device;
+    std::string model;
+    std::string build_description;
+    std::string build_fingerprint;
+
+    bool nfc;
+} variant_info_t;
+
+void search_variant(const std::vector<variant_info_t> variants);
+
+void set_variant_props(const variant_info_t variant);
+
+#endif // LIBINIT_VARIANT_H

libinit/init_xiaomi_atoll.cpp

@@ -0,0 +1,13 @@
+/*
+ * Copyright (C) 2021 The LineageOS Project
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <libinit_dalvik_heap.h>
+
+#include "vendor_init.h"
+
+void vendor_load_properties() {
+    set_dalvik_heap();
+}

libinit/libinit_dalvik_heap.cpp

@@ -0,0 +1,67 @@
+/*
+ * Copyright (C) 2021 The LineageOS Project
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <sys/sysinfo.h>
+#include <libinit_utils.h>
+
+#include <libinit_dalvik_heap.h>
+
+#define HEAPSTARTSIZE_PROP "dalvik.vm.heapstartsize"
+#define HEAPGROWTHLIMIT_PROP "dalvik.vm.heapgrowthlimit"
+#define HEAPSIZE_PROP "dalvik.vm.heapsize"
+#define HEAPMINFREE_PROP "dalvik.vm.heapminfree"
+#define HEAPMAXFREE_PROP "dalvik.vm.heapmaxfree"
+#define HEAPTARGETUTILIZATION_PROP "dalvik.vm.heaptargetutilization"
+
+#define GB(b) (b * 1024ull * 1024 * 1024)
+
+static const dalvik_heap_info_t dalvik_heap_info_6144 = {
+    .heapstartsize = "16m",
+    .heapgrowthlimit = "256m",
+    .heapsize = "512m",
+    .heapminfree = "8m",
+    .heapmaxfree = "32m",
+    .heaptargetutilization = "0.5",
+};
+
+static const dalvik_heap_info_t dalvik_heap_info_4096 = {
+    .heapstartsize = "8m",
+    .heapgrowthlimit = "256m",
+    .heapsize = "512m",
+    .heapminfree = "8m",
+    .heapmaxfree = "16m",
+    .heaptargetutilization = "0.6",
+};
+
+static const dalvik_heap_info_t dalvik_heap_info_2048 = {
+    .heapstartsize = "8m",
+    .heapgrowthlimit = "192m",
+    .heapsize = "512m",
+    .heapminfree = "512k",
+    .heapmaxfree = "8m",
+    .heaptargetutilization = "0.75",
+};
+
+void set_dalvik_heap() {
+    struct sysinfo sys;
+    const dalvik_heap_info_t *dhi;
+
+    sysinfo(&sys);
+
+    if (sys.totalram > GB(5))
+        dhi = &dalvik_heap_info_6144;
+    else if (sys.totalram > GB(3))
+        dhi = &dalvik_heap_info_4096;
+    else
+        dhi = &dalvik_heap_info_2048;
+
+    property_override(HEAPSTARTSIZE_PROP, dhi->heapstartsize);
+    property_override(HEAPGROWTHLIMIT_PROP, dhi->heapgrowthlimit);
+    property_override(HEAPSIZE_PROP, dhi->heapsize);
+    property_override(HEAPTARGETUTILIZATION_PROP, dhi->heaptargetutilization);
+    property_override(HEAPMINFREE_PROP, dhi->heapminfree);
+    property_override(HEAPMAXFREE_PROP, dhi->heapmaxfree);
+}

libinit/libinit_utils.cpp

@@ -0,0 +1,42 @@
+/*
+ * Copyright (C) 2021 The LineageOS Project
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#define _REALLY_INCLUDE_SYS__SYSTEM_PROPERTIES_H_
+#include <sys/_system_properties.h>
+#include <vector>
+
+#include <libinit_utils.h>
+
+void property_override(std::string prop, std::string value, bool add) {
+    auto pi = (prop_info *) __system_property_find(prop.c_str());
+    if (pi != nullptr) {
+        __system_property_update(pi, value.c_str(), value.length());
+    } else if (add) {
+        __system_property_add(prop.c_str(), prop.length(), value.c_str(), value.length());
+    }
+}
+
+std::vector<std::string> ro_props_default_source_order = {
+    "odm.",
+    "product.",
+    "system.",
+    "system_ext.",
+    "vendor.",
+    "",
+};
+
+void set_ro_build_prop(const std::string &prop, const std::string &value, bool product) {
+    std::string prop_name;
+
+    for (const auto &source : ro_props_default_source_order) {
+        if (product)
+            prop_name = "ro.product." + source + prop;
+        else
+            prop_name = "ro." + source + "build." + prop;
+
+        property_override(prop_name, value, true);
+    }
+}

libinit/libinit_variant.cpp

@@ -0,0 +1,41 @@
+/*
+ * Copyright (C) 2021 The LineageOS Project
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <android-base/properties.h>
+#include <libinit_utils.h>
+
+#include <libinit_variant.h>
+
+using android::base::GetProperty;
+
+#define HWC_PROP "ro.boot.hwc"
+#define HWNAME_PROP "ro.boot.hwname"
+#define SKU_PROP "ro.boot.product.hardware.sku"
+
+void search_variant(const std::vector<variant_info_t> variants) {
+    std::string hwc_value = GetProperty(HWC_PROP, "");
+    std::string hwname_value = GetProperty(HWNAME_PROP, "");
+
+    for (const auto& variant : variants) {
+        if ((variant.hwc_value == "" || variant.hwc_value == hwc_value) && (variant.device == hwname_value)) {
+            set_variant_props(variant);
+            break;
+        }
+    }
+}
+
+void set_variant_props(const variant_info_t variant) {
+    set_ro_build_prop("brand", variant.brand, true);
+    set_ro_build_prop("device", variant.device, true);
+    set_ro_build_prop("model", variant.model, true);
+
+    set_ro_build_prop("fingerprint", variant.build_fingerprint);
+    property_override("ro.bootimage.build.fingerprint", variant.build_fingerprint);
+    property_override("ro.build.description", variant.build_description);
+
+    if (variant.nfc)
+        property_override(SKU_PROP, "nfc");
+}