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