1 files changed, 322 insertions, 0 deletions
diff --git a/bifrost/r25p0/kernel/drivers/gpu/arm/midgard/ipa/mali_kbase_ipa_debugfs.c b/bifrost/r25p0/kernel/drivers/gpu/arm/midgard/ipa/mali_kbase_ipa_debugfs.c
new file mode 100644
index 0000000..30a3b7d
--- /dev/null
+++ b/bifrost/r25p0/kernel/drivers/gpu/arm/midgard/ipa/mali_kbase_ipa_debugfs.c
@@ -0,0 +1,322 @@
+/*
+ *
+ * (C) COPYRIGHT 2017-2019 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.
+ *
+ * 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, you can access it online at
+ * http://www.gnu.org/licenses/gpl-2.0.html.
+ *
+ * SPDX-License-Identifier: GPL-2.0
+ *
+ */
+
+#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(&param->model->kbdev->ipa.lock);
+	*(s64 *) val = *param->addr.s32p;
+	mutex_unlock(&param->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;
+	s32 old_val;
+	int err = 0;
+
+	if (sval < S32_MIN || sval > S32_MAX)
+		return -ERANGE;
+
+	mutex_lock(&param->model->kbdev->ipa.lock);
+	old_val = *param->addr.s32p;
+	*param->addr.s32p = val;
+	err = kbase_ipa_model_recalculate(model);
+	if (err < 0)
+		*param->addr.s32p = old_val;
+	mutex_unlock(&param->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(&param->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(&param->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;
+	char *old_str = NULL;
+	ssize_t ret = count;
+	size_t buf_size;
+	int err;
+
+	mutex_lock(&model->kbdev->ipa.lock);
+
+	if (count > param->size) {
+		ret = -EINVAL;
+		goto end;
+	}
+
+	old_str = kstrndup(param->addr.str, param->size, GFP_KERNEL);
+	if (!old_str) {
+		ret = -ENOMEM;
+		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;
+		strlcpy(param->addr.str, old_str, param->size);
+	}
+
+end:
+	kfree(old_str);
+	mutex_unlock(&model->kbdev->ipa.lock);
+
+	return ret;
+}
+
+static const struct file_operations fops_string = {
+	.owner = THIS_MODULE,
+	.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);
+
+	if (!param->name) {
+		kfree(param);
+		return -ENOMEM;
+	}
+
+	param->addr.voidp = addr;
+	param->size = size;
+	param->type = type;
+	param->model = model;
+
+	list_add(&param->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(&param_p->link);
+		kfree(param_p->name);
+		kfree(param_p);
+	}
+}
+
+static int force_fallback_model_get(void *data, u64 *val)
+{
+	struct kbase_device *kbdev = data;
+
+	mutex_lock(&kbdev->ipa.lock);
+	*val = kbdev->ipa.force_fallback_model;
+	mutex_unlock(&kbdev->ipa.lock);
+
+	return 0;
+}
+
+static int force_fallback_model_set(void *data, u64 val)
+{
+	struct kbase_device *kbdev = data;
+
+	mutex_lock(&kbdev->ipa.lock);
+	kbdev->ipa.force_fallback_model = (val ? true : false);
+	mutex_unlock(&kbdev->ipa.lock);
+
+	return 0;
+}
+
+DEFINE_DEBUGFS_ATTRIBUTE(force_fallback_model,
+		force_fallback_model_get,
+		force_fallback_model_set,
+		"%llu\n");
+
+static int current_power_get(void *data, u64 *val)
+{
+	struct kbase_device *kbdev = data;
+	struct devfreq *df = kbdev->devfreq;
+	u32 power;
+
+	kbase_pm_context_active(kbdev);
+	/* The current model assumes that there's no more than one voltage
+	 * regulator currently available in the system.
+	 */
+	kbase_get_real_power(df, &power,
+		kbdev->current_nominal_freq,
+		(kbdev->current_voltages[0] / 1000));
+	kbase_pm_context_idle(kbdev);
+
+	*val = power;
+
+	return 0;
+}
+DEFINE_DEBUGFS_ATTRIBUTE(current_power, current_power_get, NULL, "%llu\n");
+
+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_model_param_set_s32(struct kbase_ipa_model *model,
+	const char *name, s32 val)
+{
+	struct kbase_ipa_model_param *param;
+
+	mutex_lock(&model->kbdev->ipa.lock);
+
+	list_for_each_entry(param, &model->params, link) {
+		if (!strcmp(param->name, name)) {
+			if (param->type == PARAM_TYPE_S32) {
+				*param->addr.s32p = val;
+			} else {
+				dev_err(model->kbdev->dev,
+					"Wrong type for %s parameter %s\n",
+					model->ops->name, param->name);
+			}
+			break;
+		}
+	}
+
+	mutex_unlock(&model->kbdev->ipa.lock);
+}
+KBASE_EXPORT_TEST_API(kbase_ipa_model_param_set_s32);
+
+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);
+
+	debugfs_create_file("ipa_current_power", 0444,
+		kbdev->mali_debugfs_directory, kbdev, &current_power);
+	debugfs_create_file("ipa_force_fallback_model", 0644,
+		kbdev->mali_debugfs_directory, kbdev, &force_fallback_model);
+
+	mutex_unlock(&kbdev->ipa.lock);
+}