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/*
*
* (C) COPYRIGHT 2017 ARM Limited. All rights reserved.
*
* This program is free software and is provided to you under the terms of the
* GNU General Public License version 2 as published by the Free Software
* Foundation, and any use by you of this program is subject to the terms
* of such GNU licence.
*
* A copy of the licence is included with the program, and can also be obtained
* from Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
*/
#include <linux/debugfs.h>
#include <linux/list.h>
#include <linux/mutex.h>
#include "mali_kbase.h"
#include "mali_kbase_ipa.h"
#include "mali_kbase_ipa_debugfs.h"
#if (LINUX_VERSION_CODE < KERNEL_VERSION(4, 6, 0))
#define DEFINE_DEBUGFS_ATTRIBUTE DEFINE_SIMPLE_ATTRIBUTE
#endif
struct kbase_ipa_model_param {
char *name;
union {
void *voidp;
s32 *s32p;
char *str;
} addr;
size_t size;
enum kbase_ipa_model_param_type type;
struct kbase_ipa_model *model;
struct list_head link;
};
static int param_int_get(void *data, u64 *val)
{
struct kbase_ipa_model_param *param = data;
mutex_lock(¶m->model->kbdev->ipa.lock);
*(s64 *) val = *param->addr.s32p;
mutex_unlock(¶m->model->kbdev->ipa.lock);
return 0;
}
static int param_int_set(void *data, u64 val)
{
struct kbase_ipa_model_param *param = data;
struct kbase_ipa_model *model = param->model;
s64 sval = (s64) val;
int err = 0;
if (sval < S32_MIN || sval > S32_MAX)
return -ERANGE;
mutex_lock(¶m->model->kbdev->ipa.lock);
*param->addr.s32p = val;
err = kbase_ipa_model_recalculate(model);
mutex_unlock(¶m->model->kbdev->ipa.lock);
return err;
}
DEFINE_DEBUGFS_ATTRIBUTE(fops_s32, param_int_get, param_int_set, "%lld\n");
static ssize_t param_string_get(struct file *file, char __user *user_buf,
size_t count, loff_t *ppos)
{
struct kbase_ipa_model_param *param = file->private_data;
ssize_t ret;
size_t len;
mutex_lock(¶m->model->kbdev->ipa.lock);
len = strnlen(param->addr.str, param->size - 1) + 1;
ret = simple_read_from_buffer(user_buf, count, ppos,
param->addr.str, len);
mutex_unlock(¶m->model->kbdev->ipa.lock);
return ret;
}
static ssize_t param_string_set(struct file *file, const char __user *user_buf,
size_t count, loff_t *ppos)
{
struct kbase_ipa_model_param *param = file->private_data;
struct kbase_ipa_model *model = param->model;
ssize_t ret = count;
size_t buf_size;
int err;
mutex_lock(&model->kbdev->ipa.lock);
if (count > param->size) {
ret = -EINVAL;
goto end;
}
buf_size = min(param->size - 1, count);
if (copy_from_user(param->addr.str, user_buf, buf_size)) {
ret = -EFAULT;
goto end;
}
param->addr.str[buf_size] = '\0';
err = kbase_ipa_model_recalculate(model);
if (err < 0)
ret = err;
end:
mutex_unlock(&model->kbdev->ipa.lock);
return ret;
}
static const struct file_operations fops_string = {
.read = param_string_get,
.write = param_string_set,
.open = simple_open,
.llseek = default_llseek,
};
int kbase_ipa_model_param_add(struct kbase_ipa_model *model, const char *name,
void *addr, size_t size,
enum kbase_ipa_model_param_type type)
{
struct kbase_ipa_model_param *param;
param = kzalloc(sizeof(*param), GFP_KERNEL);
if (!param)
return -ENOMEM;
/* 'name' is stack-allocated for array elements, so copy it into
* heap-allocated storage */
param->name = kstrdup(name, GFP_KERNEL);
param->addr.voidp = addr;
param->size = size;
param->type = type;
param->model = model;
list_add(¶m->link, &model->params);
return 0;
}
void kbase_ipa_model_param_free_all(struct kbase_ipa_model *model)
{
struct kbase_ipa_model_param *param_p, *param_n;
list_for_each_entry_safe(param_p, param_n, &model->params, link) {
list_del(¶m_p->link);
kfree(param_p->name);
kfree(param_p);
}
}
static void kbase_ipa_model_debugfs_init(struct kbase_ipa_model *model)
{
struct list_head *it;
struct dentry *dir;
lockdep_assert_held(&model->kbdev->ipa.lock);
dir = debugfs_create_dir(model->ops->name,
model->kbdev->mali_debugfs_directory);
if (!dir) {
dev_err(model->kbdev->dev,
"Couldn't create mali debugfs %s directory",
model->ops->name);
return;
}
list_for_each(it, &model->params) {
struct kbase_ipa_model_param *param =
list_entry(it,
struct kbase_ipa_model_param,
link);
const struct file_operations *fops = NULL;
switch (param->type) {
case PARAM_TYPE_S32:
fops = &fops_s32;
break;
case PARAM_TYPE_STRING:
fops = &fops_string;
break;
}
if (unlikely(!fops)) {
dev_err(model->kbdev->dev,
"Type not set for %s parameter %s\n",
model->ops->name, param->name);
} else {
debugfs_create_file(param->name, S_IRUGO | S_IWUSR,
dir, param, fops);
}
}
}
void kbase_ipa_debugfs_init(struct kbase_device *kbdev)
{
mutex_lock(&kbdev->ipa.lock);
if (kbdev->ipa.configured_model != kbdev->ipa.fallback_model)
kbase_ipa_model_debugfs_init(kbdev->ipa.configured_model);
kbase_ipa_model_debugfs_init(kbdev->ipa.fallback_model);
mutex_unlock(&kbdev->ipa.lock);
}
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