[IMPROVE] add setting parameters in debugfs

for swap_energy module

Change-Id: I3fb78f8d7c171e84560cfa7bc03e3efe322cdc8f
Signed-off-by: Vyacheslav Cherkashin <v.cherkashin@samsung.com>

diff --git a/energy/Kbuild b/energy/Kbuild
index 5502602..af1c477 100644 (file)
--- a/energy/Kbuild
+++ b/energy/Kbuild
@@ -1,5 +1,7 @@
 EXTRA_CFLAGS := $(extra_cflags)
 
 obj-m := swap_energy.o
-swap_energy-y := energy.o lcd/lcd_base.o
+swap_energy-y := energy.o \
+                 debugfs_energy.o \
+                 lcd/lcd_base.o
 swap_energy-$(CONFIG_LCD_S6E8AA0) += lcd/s6e8aa0.o

diff --git a/energy/debugfs_energy.c b/energy/debugfs_energy.c
new file mode 100644 (file)
index 0000000..3d385bd
--- /dev/null
+++ b/energy/debugfs_energy.c
@@ -0,0 +1,182 @@
+/*
+ *  Dynamic Binary Instrumentation Module based on KProbes
+ *  energy/debugfs_energy.c
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *
+ * Copyright (C) Samsung Electronics, 2013
+ *
+ * 2013         Vyacheslav Cherkashin <v.cherkashin@samsung.com>
+ *
+ */
+
+
+#include <linux/fs.h>
+#include <linux/module.h>
+#include <linux/debugfs.h>
+#include <driver/swap_debugfs.h>
+
+
+/* CPU */
+static u64 cpu_numerator = 1;
+static u64 cpu_denominator = 1;
+
+/* flash read */
+static u64 fr_numerator = 1;
+static u64 fr_denominator = 1;
+
+/* flash write */
+static u64 fw_numerator = 1;
+static u64 fw_denominator = 1;
+
+
+
+
+
+/* ============================================================================
+ * ===                             PARAMETERS                               ===
+ * ============================================================================
+ */
+static int denominator_set(void *data, u64 val)
+{
+       if (val == 0)
+               return -EINVAL;
+
+       *(u64 *)data = val;
+       return 0;
+}
+
+static int denominator_get(void *data, u64 *val)
+{
+       *val = *(u64 *)data;
+       return 0;
+}
+
+DEFINE_SIMPLE_ATTRIBUTE(fops_denominator, denominator_get, \
+                       denominator_set, "%llu\n");
+
+static int create_fraction(struct dentry *parent,
+                          u64 *numerator, u64 *denominator)
+{
+       struct dentry *num, *den;
+
+       num = debugfs_create_u64("numerator", 0600, parent, numerator);
+       if (num == NULL)
+               return -ENOMEM;
+
+       den = debugfs_create_file("denominator", 0600, parent, denominator,
+                                 &fops_denominator);
+       if (den == NULL) {
+               debugfs_remove(num);
+               return -ENOMEM;
+       }
+
+       return 0;
+}
+
+static struct dentry *create_parameter(struct dentry *parent, const char *name,
+                                      u64 *numerator, u64 *denominator)
+{
+       struct dentry *dentry;
+
+       dentry = debugfs_create_dir(name, parent);
+       if (dentry) {
+               int err;
+
+               err = create_fraction(dentry, &cpu_numerator,
+                                     &cpu_denominator);
+
+               if (err) {
+                       debugfs_remove(dentry);
+                       dentry = NULL;
+               }
+       }
+
+       return dentry;
+}
+
+struct param_data {
+       char *name;
+       u64 *numerator;
+       u64 *denominator;
+};
+
+struct param_data parameters[] = {
+       {
+               .name = "CPU",
+               .numerator = &cpu_numerator,
+               .denominator = &cpu_denominator
+       },
+       {
+               .name = "flash_read",
+               .numerator = &fr_numerator,
+               .denominator = &fr_denominator
+       },
+       {
+               .name = "flash_write",
+               .numerator = &fw_numerator,
+               .denominator = &fw_denominator
+       }
+};
+
+enum {
+       parameters_cnt = sizeof(parameters) / sizeof(struct param_data)
+};
+
+
+
+
+
+/* ============================================================================
+ * ===                              INIT/EXIT                               ===
+ * ============================================================================
+ */
+static struct dentry *energy_dir = NULL;
+
+void exit_debugfs_energy(void)
+{
+       if (energy_dir)
+               debugfs_remove_recursive(energy_dir);
+
+       energy_dir = NULL;
+}
+
+int init_debugfs_energy(void)
+{
+       int i;
+       struct dentry *swap_dir, *dentry;
+
+       swap_dir = get_swap_debugfs_dir();
+       if (swap_dir == NULL)
+               return -ENOENT;
+
+       energy_dir = debugfs_create_dir("energy", swap_dir);
+       if (energy_dir == NULL)
+               return -ENOMEM;
+
+       for (i = 0; i < parameters_cnt; ++i) {
+               dentry = create_parameter(energy_dir, parameters[i].name,
+                                         parameters[i].numerator,
+                                         parameters[i].denominator);
+               if (dentry == NULL)
+                       goto fail;
+       }
+
+       return 0;
+
+fail:
+       exit_debugfs_energy();
+       return -ENOMEM;
+}

diff --git a/energy/debugfs_energy.h b/energy/debugfs_energy.h
new file mode 100644 (file)
index 0000000..cfc0798
--- /dev/null
+++ b/energy/debugfs_energy.h
@@ -0,0 +1,31 @@
+#ifndef _DEBUGFS_ENERGY_H
+#define _DEBUGFS_ENERGY_H
+
+/*
+ *  Dynamic Binary Instrumentation Module based on KProbes
+ *  energy/debugfs_energy.h
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *
+ * Copyright (C) Samsung Electronics, 2013
+ *
+ * 2013         Vyacheslav Cherkashin <v.cherkashin@samsung.com>
+ *
+ */
+
+int init_debugfs_energy(void);
+void exit_debugfs_energy(void);
+
+#endif /* _DEBUGFS_ENERGY_H */

diff --git a/energy/energy.c b/energy/energy.c
index f443548..5317cf7 100644 (file)
--- a/energy/energy.c
+++ b/energy/energy.c
@@ -34,6 +34,7 @@
 #include <ksyms/ksyms.h>
 #include <us_manager/sspt/sspt_proc.h>
 #include <us_manager/sspt/sspt_feature.h>
+#include "debugfs_energy.h"
 
 
 struct energy_data {
@@ -354,6 +355,11 @@ static int __init swap_energy_init(void)
 {
        int ret;
        unsigned long addr;
+
+       ret = init_debugfs_energy();
+       if (ret)
+               return ret;
+
        addr = swap_ksyms("__switch_to");
        if (addr == 0) {
                printk("Cannot find address for __switch_to function!\n");
@@ -383,6 +389,7 @@ static int __init swap_energy_init(void)
 static void __exit swap_energy_exit(void)
 {
        uninit_feature();
+       exit_debugfs_energy();
 }
 
 module_init(swap_energy_init);