drivers: add stub kperfmon

drivers/Kconfig

@@ -260,6 +260,7 @@ source "drivers/sti/common/Kconfig" # ADDED BY LEGO AUTOMATICALLY: DO NOT SUBMIT
 source "drivers/input/input_boost/Kconfig" # ADDED BY LEGO AUTOMATICALLY: DO NOT SUBMIT
 source "drivers/battery/core/Kconfig" # ADDED BY LEGO AUTOMATICALLY: DO NOT SUBMIT
 source "drivers/kq/mesh/Kconfig" # ADDED BY LEGO AUTOMATICALLY: DO NOT SUBMIT
+source "drivers/kperfmon/Kconfig" # ADDED BY LEGO AUTOMATICALLY: DO NOT SUBMIT
 source "drivers/vibrator/common/vib_info/Kconfig" # ADDED BY LEGO AUTOMATICALLY: DO NOT SUBMIT
 source "drivers/input/sec_input/Kconfig" # ADDED BY LEGO AUTOMATICALLY: DO NOT SUBMIT
 source "drivers/usb/common/vbus_notifier/Kconfig" # ADDED BY LEGO AUTOMATICALLY: DO NOT SUBMIT

drivers/Makefile

@@ -216,6 +216,7 @@ obj-y += muic/common/ # ADDED BY LEGO AUTOMATICALLY: DO NOT SUBMIT
 obj-y += input/input_boost/ # ADDED BY LEGO AUTOMATICALLY: DO NOT SUBMIT
 obj-y += battery/core/ # ADDED BY LEGO AUTOMATICALLY: DO NOT SUBMIT
 obj-y += kq/mesh/ # ADDED BY LEGO AUTOMATICALLY: DO NOT SUBMIT
+obj-y += kperfmon/ # ADDED BY LEGO AUTOMATICALLY: DO NOT SUBMIT
 obj-y += vibrator/common/vib_info/ # ADDED BY LEGO AUTOMATICALLY: DO NOT SUBMIT
 obj-y += input/sec_input/ # ADDED BY LEGO AUTOMATICALLY: DO NOT SUBMIT
 obj-y += usb/common/vbus_notifier/ # ADDED BY LEGO AUTOMATICALLY: DO NOT SUBMIT

drivers/kperfmon/Kconfig

@@ -0,0 +1,25 @@
+#
+# Samsung Performance Logging system
+#
+
+menu "samsung Performace manager"
+
+config KPERFMON
+	bool "Enable performance log"
+	default y
+	help
+		Samsung performance log(OLOG).
+		Say Y here if enable performance olog driver to do logging system resources.
+		When some delay occurs in the kernel, native or user user space,
+		the logging information should be restored into the system.
+
+config KPERFMON_BUILD
+	tristate "Building tyoe of performance log"
+	default m
+	help
+		Samsung performance log(OLOG).
+		This is to set a build type for module or build-in.
+		Say m here if you want a module of performance olog driver.
+		Say y here if you want build-in object of the performance olog driver.
+
+endmenu

drivers/kperfmon/Makefile

@@ -0,0 +1,20 @@
+#
+# Makefile for the Linux kernel device drivers.
+#
+# Sep 2018, Binse Park <h22yap@gmail.com>
+# Rewritten to use lists instead of if-statements.
+#
+
+FLAG=1
+
+ifneq ($(CONFIG_KPERFMON), y)
+FLAG=0
+endif
+
+ifeq ($(FLAG), 1)
+ifeq ($(CONFIG_KPERFMON_BUILD), y)
+	obj-y		+= kperfmon.o
+else
+	obj-m		+= kperfmon.o
+endif
+endif

drivers/kperfmon/kperfmon.c

@@ -0,0 +1,71 @@
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/proc_fs.h>
+#include <asm/uaccess.h>
+
+#define BUFFER_SIZE 1024
+
+#define PROC_NAME "kperfmon"
+#define MESSAGE "kperfmon_version [1.0.1]   kperfmon_read : 0x39b76d0,  kperfmon_write : 0x39b76b8\njava_version [U14.1.0]\nnativelib_version [U14.1.0]\nperfmond_version [U14.3.0]\n[01-01 00:00:00.000 1  1181     0 (  2)][LOG][LCDV] ON\n"
+
+static ssize_t proc_read(struct file *file, char *buf, size_t count, loff_t *pos);
+static int proc_open(struct inode *inode, struct file *file);
+static ssize_t proc_write(struct file *file, const char __user *usr_buf, size_t count, loff_t *pos);
+
+static struct proc_ops proc_ops = {
+        .proc_read = proc_read,
+	.proc_open = proc_open,
+	.proc_write = proc_write,
+};
+
+static int proc_init(void) {
+ 	if (proc_create(PROC_NAME, 0664, NULL, &proc_ops) == NULL) {
+ 		pr_info("%s() - Error creating entry in proc failed!!!\n", __func__);
+ 		return -ENOMEM;
+ 	}
+	pr_info("%s()\n", __func__);
+	return 0;
+}
+
+static void proc_exit(void) {
+	remove_proc_entry(PROC_NAME, NULL);
+	pr_info("%s()\n", __func__);
+}
+
+static ssize_t proc_read(struct file *file, char __user *usr_buf, size_t count, loff_t *pos) {
+	int rv;
+	char buffer[BUFFER_SIZE];
+
+	rv = snprintf(buffer, sizeof(buffer), MESSAGE);
+	if (rv < 0)
+		return rv;
+
+	if (*pos >= rv)
+		return 0;
+
+	if (count > rv - *pos)
+		count = rv - *pos;
+
+	if (copy_to_user(usr_buf, buffer + *pos, count)) {
+		return -EFAULT;
+	}
+
+	*pos += count;
+	return count;
+}
+
+static int proc_open(struct inode *inode, struct file *file) {
+    return 0;
+}
+
+static ssize_t proc_write(struct file *file, const char __user *usr_buf, size_t count, loff_t *pos) {
+    return count;
+}
+
+module_init(proc_init);
+module_exit(proc_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Binse Park <unsang.park@samsung.com>");
+MODULE_DESCRIPTION("Performance Log(OLOG)");