Adding upstream version 6.1.76.upstream/6.1.76upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 589 insertions, 0 deletions

diff --git a/drivers/gpu/drm/drm_mode_object.c b/drivers/gpu/drm/drm_mode_object.c
new file mode 100644
index 000000000..ba1608eff
--- /dev/null
+++ b/drivers/gpu/drm/drm_mode_object.c
@@ -0,0 +1,589 @@
+/*
+ * Copyright (c) 2016 Intel Corporation
+ *
+ * Permission to use, copy, modify, distribute, and sell this software and its
+ * documentation for any purpose is hereby granted without fee, provided that
+ * the above copyright notice appear in all copies and that both that copyright
+ * notice and this permission notice appear in supporting documentation, and
+ * that the name of the copyright holders not be used in advertising or
+ * publicity pertaining to distribution of the software without specific,
+ * written prior permission.  The copyright holders make no representations
+ * about the suitability of this software for any purpose.  It is provided "as
+ * is" without express or implied warranty.
+ *
+ * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+ * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
+ * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
+ * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
+ * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
+ * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
+ * OF THIS SOFTWARE.
+ */
+
+#include <linux/export.h>
+#include <linux/uaccess.h>
+
+#include <drm/drm_atomic.h>
+#include <drm/drm_drv.h>
+#include <drm/drm_device.h>
+#include <drm/drm_file.h>
+#include <drm/drm_mode_object.h>
+#include <drm/drm_print.h>
+
+#include "drm_crtc_internal.h"
+
+/*
+ * Internal function to assign a slot in the object idr and optionally
+ * register the object into the idr.
+ */
+int __drm_mode_object_add(struct drm_device *dev, struct drm_mode_object *obj,
+			  uint32_t obj_type, bool register_obj,
+			  void (*obj_free_cb)(struct kref *kref))
+{
+	int ret;
+
+	WARN_ON(!dev->driver->load && dev->registered && !obj_free_cb);
+
+	mutex_lock(&dev->mode_config.idr_mutex);
+	ret = idr_alloc(&dev->mode_config.object_idr, register_obj ? obj : NULL,
+			1, 0, GFP_KERNEL);
+	if (ret >= 0) {
+		/*
+		 * Set up the object linking under the protection of the idr
+		 * lock so that other users can't see inconsistent state.
+		 */
+		obj->id = ret;
+		obj->type = obj_type;
+		if (obj_free_cb) {
+			obj->free_cb = obj_free_cb;
+			kref_init(&obj->refcount);
+		}
+	}
+	mutex_unlock(&dev->mode_config.idr_mutex);
+
+	return ret < 0 ? ret : 0;
+}
+
+/**
+ * drm_mode_object_add - allocate a new modeset identifier
+ * @dev: DRM device
+ * @obj: object pointer, used to generate unique ID
+ * @obj_type: object type
+ *
+ * Create a unique identifier based on @ptr in @dev's identifier space.  Used
+ * for tracking modes, CRTCs and connectors.
+ *
+ * Returns:
+ * Zero on success, error code on failure.
+ */
+int drm_mode_object_add(struct drm_device *dev,
+			struct drm_mode_object *obj, uint32_t obj_type)
+{
+	return __drm_mode_object_add(dev, obj, obj_type, true, NULL);
+}
+
+void drm_mode_object_register(struct drm_device *dev,
+			      struct drm_mode_object *obj)
+{
+	mutex_lock(&dev->mode_config.idr_mutex);
+	idr_replace(&dev->mode_config.object_idr, obj, obj->id);
+	mutex_unlock(&dev->mode_config.idr_mutex);
+}
+
+/**
+ * drm_mode_object_unregister - free a modeset identifier
+ * @dev: DRM device
+ * @object: object to free
+ *
+ * Free @id from @dev's unique identifier pool.
+ * This function can be called multiple times, and guards against
+ * multiple removals.
+ * These modeset identifiers are _not_ reference counted. Hence don't use this
+ * for reference counted modeset objects like framebuffers.
+ */
+void drm_mode_object_unregister(struct drm_device *dev,
+				struct drm_mode_object *object)
+{
+	WARN_ON(!dev->driver->load && dev->registered && !object->free_cb);
+
+	mutex_lock(&dev->mode_config.idr_mutex);
+	if (object->id) {
+		idr_remove(&dev->mode_config.object_idr, object->id);
+		object->id = 0;
+	}
+	mutex_unlock(&dev->mode_config.idr_mutex);
+}
+
+/**
+ * drm_mode_object_lease_required - check types which must be leased to be used
+ * @type: type of object
+ *
+ * Returns whether the provided type of drm_mode_object must
+ * be owned or leased to be used by a process.
+ */
+bool drm_mode_object_lease_required(uint32_t type)
+{
+	switch(type) {
+	case DRM_MODE_OBJECT_CRTC:
+	case DRM_MODE_OBJECT_CONNECTOR:
+	case DRM_MODE_OBJECT_PLANE:
+		return true;
+	default:
+		return false;
+	}
+}
+
+struct drm_mode_object *__drm_mode_object_find(struct drm_device *dev,
+					       struct drm_file *file_priv,
+					       uint32_t id, uint32_t type)
+{
+	struct drm_mode_object *obj = NULL;
+
+	mutex_lock(&dev->mode_config.idr_mutex);
+	obj = idr_find(&dev->mode_config.object_idr, id);
+	if (obj && type != DRM_MODE_OBJECT_ANY && obj->type != type)
+		obj = NULL;
+	if (obj && obj->id != id)
+		obj = NULL;
+
+	if (obj && drm_mode_object_lease_required(obj->type) &&
+	    !_drm_lease_held(file_priv, obj->id))
+		obj = NULL;
+
+	if (obj && obj->free_cb) {
+		if (!kref_get_unless_zero(&obj->refcount))
+			obj = NULL;
+	}
+	mutex_unlock(&dev->mode_config.idr_mutex);
+
+	return obj;
+}
+
+/**
+ * drm_mode_object_find - look up a drm object with static lifetime
+ * @dev: drm device
+ * @file_priv: drm file
+ * @id: id of the mode object
+ * @type: type of the mode object
+ *
+ * This function is used to look up a modeset object. It will acquire a
+ * reference for reference counted objects. This reference must be dropped again
+ * by callind drm_mode_object_put().
+ */
+struct drm_mode_object *drm_mode_object_find(struct drm_device *dev,
+		struct drm_file *file_priv,
+		uint32_t id, uint32_t type)
+{
+	struct drm_mode_object *obj = NULL;
+
+	obj = __drm_mode_object_find(dev, file_priv, id, type);
+	return obj;
+}
+EXPORT_SYMBOL(drm_mode_object_find);
+
+/**
+ * drm_mode_object_put - release a mode object reference
+ * @obj: DRM mode object
+ *
+ * This function decrements the object's refcount if it is a refcounted modeset
+ * object. It is a no-op on any other object. This is used to drop references
+ * acquired with drm_mode_object_get().
+ */
+void drm_mode_object_put(struct drm_mode_object *obj)
+{
+	if (obj->free_cb) {
+		DRM_DEBUG("OBJ ID: %d (%d)\n", obj->id, kref_read(&obj->refcount));
+		kref_put(&obj->refcount, obj->free_cb);
+	}
+}
+EXPORT_SYMBOL(drm_mode_object_put);
+
+/**
+ * drm_mode_object_get - acquire a mode object reference
+ * @obj: DRM mode object
+ *
+ * This function increments the object's refcount if it is a refcounted modeset
+ * object. It is a no-op on any other object. References should be dropped again
+ * by calling drm_mode_object_put().
+ */
+void drm_mode_object_get(struct drm_mode_object *obj)
+{
+	if (obj->free_cb) {
+		DRM_DEBUG("OBJ ID: %d (%d)\n", obj->id, kref_read(&obj->refcount));
+		kref_get(&obj->refcount);
+	}
+}
+EXPORT_SYMBOL(drm_mode_object_get);
+
+/**
+ * drm_object_attach_property - attach a property to a modeset object
+ * @obj: drm modeset object
+ * @property: property to attach
+ * @init_val: initial value of the property
+ *
+ * This attaches the given property to the modeset object with the given initial
+ * value. Currently this function cannot fail since the properties are stored in
+ * a statically sized array.
+ *
+ * Note that all properties must be attached before the object itself is
+ * registered and accessible from userspace.
+ */
+void drm_object_attach_property(struct drm_mode_object *obj,
+				struct drm_property *property,
+				uint64_t init_val)
+{
+	int count = obj->properties->count;
+	struct drm_device *dev = property->dev;
+
+
+	if (obj->type == DRM_MODE_OBJECT_CONNECTOR) {
+		struct drm_connector *connector = obj_to_connector(obj);
+
+		WARN_ON(!dev->driver->load &&
+			connector->registration_state == DRM_CONNECTOR_REGISTERED);
+	} else {
+		WARN_ON(!dev->driver->load && dev->registered);
+	}
+
+	if (count == DRM_OBJECT_MAX_PROPERTY) {
+		WARN(1, "Failed to attach object property (type: 0x%x). Please "
+			"increase DRM_OBJECT_MAX_PROPERTY by 1 for each time "
+			"you see this message on the same object type.\n",
+			obj->type);
+		return;
+	}
+
+	obj->properties->properties[count] = property;
+	obj->properties->values[count] = init_val;
+	obj->properties->count++;
+}
+EXPORT_SYMBOL(drm_object_attach_property);
+
+/**
+ * drm_object_property_set_value - set the value of a property
+ * @obj: drm mode object to set property value for
+ * @property: property to set
+ * @val: value the property should be set to
+ *
+ * This function sets a given property on a given object. This function only
+ * changes the software state of the property, it does not call into the
+ * driver's ->set_property callback.
+ *
+ * Note that atomic drivers should not have any need to call this, the core will
+ * ensure consistency of values reported back to userspace through the
+ * appropriate ->atomic_get_property callback. Only legacy drivers should call
+ * this function to update the tracked value (after clamping and other
+ * restrictions have been applied).
+ *
+ * Returns:
+ * Zero on success, error code on failure.
+ */
+int drm_object_property_set_value(struct drm_mode_object *obj,
+				  struct drm_property *property, uint64_t val)
+{
+	int i;
+
+	WARN_ON(drm_drv_uses_atomic_modeset(property->dev) &&
+		!(property->flags & DRM_MODE_PROP_IMMUTABLE));
+
+	for (i = 0; i < obj->properties->count; i++) {
+		if (obj->properties->properties[i] == property) {
+			obj->properties->values[i] = val;
+			return 0;
+		}
+	}
+
+	return -EINVAL;
+}
+EXPORT_SYMBOL(drm_object_property_set_value);
+
+static int __drm_object_property_get_prop_value(struct drm_mode_object *obj,
+						struct drm_property *property,
+						uint64_t *val)
+{
+	int i;
+
+	for (i = 0; i < obj->properties->count; i++) {
+		if (obj->properties->properties[i] == property) {
+			*val = obj->properties->values[i];
+			return 0;
+		}
+	}
+
+	return -EINVAL;
+}
+
+static int __drm_object_property_get_value(struct drm_mode_object *obj,
+					   struct drm_property *property,
+					   uint64_t *val)
+{
+
+	/* read-only properties bypass atomic mechanism and still store
+	 * their value in obj->properties->values[].. mostly to avoid
+	 * having to deal w/ EDID and similar props in atomic paths:
+	 */
+	if (drm_drv_uses_atomic_modeset(property->dev) &&
+			!(property->flags & DRM_MODE_PROP_IMMUTABLE))
+		return drm_atomic_get_property(obj, property, val);
+
+	return __drm_object_property_get_prop_value(obj, property, val);
+}
+
+/**
+ * drm_object_property_get_value - retrieve the value of a property
+ * @obj: drm mode object to get property value from
+ * @property: property to retrieve
+ * @val: storage for the property value
+ *
+ * This function retrieves the softare state of the given property for the given
+ * property. Since there is no driver callback to retrieve the current property
+ * value this might be out of sync with the hardware, depending upon the driver
+ * and property.
+ *
+ * Atomic drivers should never call this function directly, the core will read
+ * out property values through the various ->atomic_get_property callbacks.
+ *
+ * Returns:
+ * Zero on success, error code on failure.
+ */
+int drm_object_property_get_value(struct drm_mode_object *obj,
+				  struct drm_property *property, uint64_t *val)
+{
+	WARN_ON(drm_drv_uses_atomic_modeset(property->dev));
+
+	return __drm_object_property_get_value(obj, property, val);
+}
+EXPORT_SYMBOL(drm_object_property_get_value);
+
+/**
+ * drm_object_property_get_default_value - retrieve the default value of a
+ * property when in atomic mode.
+ * @obj: drm mode object to get property value from
+ * @property: property to retrieve
+ * @val: storage for the property value
+ *
+ * This function retrieves the default state of the given property as passed in
+ * to drm_object_attach_property
+ *
+ * Only atomic drivers should call this function directly, as for non-atomic
+ * drivers it will return the current value.
+ *
+ * Returns:
+ * Zero on success, error code on failure.
+ */
+int drm_object_property_get_default_value(struct drm_mode_object *obj,
+					  struct drm_property *property,
+					  uint64_t *val)
+{
+	WARN_ON(!drm_drv_uses_atomic_modeset(property->dev));
+
+	return __drm_object_property_get_prop_value(obj, property, val);
+}
+EXPORT_SYMBOL(drm_object_property_get_default_value);
+
+/* helper for getconnector and getproperties ioctls */
+int drm_mode_object_get_properties(struct drm_mode_object *obj, bool atomic,
+				   uint32_t __user *prop_ptr,
+				   uint64_t __user *prop_values,
+				   uint32_t *arg_count_props)
+{
+	int i, ret, count;
+
+	for (i = 0, count = 0; i < obj->properties->count; i++) {
+		struct drm_property *prop = obj->properties->properties[i];
+		uint64_t val;
+
+		if ((prop->flags & DRM_MODE_PROP_ATOMIC) && !atomic)
+			continue;
+
+		if (*arg_count_props > count) {
+			ret = __drm_object_property_get_value(obj, prop, &val);
+			if (ret)
+				return ret;
+
+			if (put_user(prop->base.id, prop_ptr + count))
+				return -EFAULT;
+
+			if (put_user(val, prop_values + count))
+				return -EFAULT;
+		}
+
+		count++;
+	}
+	*arg_count_props = count;
+
+	return 0;
+}
+
+/**
+ * drm_mode_obj_get_properties_ioctl - get the current value of a object's property
+ * @dev: DRM device
+ * @data: ioctl data
+ * @file_priv: DRM file info
+ *
+ * This function retrieves the current value for an object's property. Compared
+ * to the connector specific ioctl this one is extended to also work on crtc and
+ * plane objects.
+ *
+ * Called by the user via ioctl.
+ *
+ * Returns:
+ * Zero on success, negative errno on failure.
+ */
+int drm_mode_obj_get_properties_ioctl(struct drm_device *dev, void *data,
+				      struct drm_file *file_priv)
+{
+	struct drm_mode_obj_get_properties *arg = data;
+	struct drm_mode_object *obj;
+	struct drm_modeset_acquire_ctx ctx;
+	int ret = 0;
+
+	if (!drm_core_check_feature(dev, DRIVER_MODESET))
+		return -EOPNOTSUPP;
+
+	DRM_MODESET_LOCK_ALL_BEGIN(dev, ctx, 0, ret);
+
+	obj = drm_mode_object_find(dev, file_priv, arg->obj_id, arg->obj_type);
+	if (!obj) {
+		ret = -ENOENT;
+		goto out;
+	}
+	if (!obj->properties) {
+		ret = -EINVAL;
+		goto out_unref;
+	}
+
+	ret = drm_mode_object_get_properties(obj, file_priv->atomic,
+			(uint32_t __user *)(unsigned long)(arg->props_ptr),
+			(uint64_t __user *)(unsigned long)(arg->prop_values_ptr),
+			&arg->count_props);
+
+out_unref:
+	drm_mode_object_put(obj);
+out:
+	DRM_MODESET_LOCK_ALL_END(dev, ctx, ret);
+	return ret;
+}
+
+struct drm_property *drm_mode_obj_find_prop_id(struct drm_mode_object *obj,
+					       uint32_t prop_id)
+{
+	int i;
+
+	for (i = 0; i < obj->properties->count; i++)
+		if (obj->properties->properties[i]->base.id == prop_id)
+			return obj->properties->properties[i];
+
+	return NULL;
+}
+
+static int set_property_legacy(struct drm_mode_object *obj,
+			       struct drm_property *prop,
+			       uint64_t prop_value)
+{
+	struct drm_device *dev = prop->dev;
+	struct drm_mode_object *ref;
+	struct drm_modeset_acquire_ctx ctx;
+	int ret = -EINVAL;
+
+	if (!drm_property_change_valid_get(prop, prop_value, &ref))
+		return -EINVAL;
+
+	DRM_MODESET_LOCK_ALL_BEGIN(dev, ctx, 0, ret);
+	switch (obj->type) {
+	case DRM_MODE_OBJECT_CONNECTOR:
+		ret = drm_connector_set_obj_prop(obj, prop, prop_value);
+		break;
+	case DRM_MODE_OBJECT_CRTC:
+		ret = drm_mode_crtc_set_obj_prop(obj, prop, prop_value);
+		break;
+	case DRM_MODE_OBJECT_PLANE:
+		ret = drm_mode_plane_set_obj_prop(obj_to_plane(obj),
+						  prop, prop_value);
+		break;
+	}
+	drm_property_change_valid_put(prop, ref);
+	DRM_MODESET_LOCK_ALL_END(dev, ctx, ret);
+
+	return ret;
+}
+
+static int set_property_atomic(struct drm_mode_object *obj,
+			       struct drm_file *file_priv,
+			       struct drm_property *prop,
+			       uint64_t prop_value)
+{
+	struct drm_device *dev = prop->dev;
+	struct drm_atomic_state *state;
+	struct drm_modeset_acquire_ctx ctx;
+	int ret;
+
+	state = drm_atomic_state_alloc(dev);
+	if (!state)
+		return -ENOMEM;
+
+	drm_modeset_acquire_init(&ctx, 0);
+	state->acquire_ctx = &ctx;
+
+retry:
+	if (prop == state->dev->mode_config.dpms_property) {
+		if (obj->type != DRM_MODE_OBJECT_CONNECTOR) {
+			ret = -EINVAL;
+			goto out;
+		}
+
+		ret = drm_atomic_connector_commit_dpms(state,
+						       obj_to_connector(obj),
+						       prop_value);
+	} else {
+		ret = drm_atomic_set_property(state, file_priv, obj, prop, prop_value);
+		if (ret)
+			goto out;
+		ret = drm_atomic_commit(state);
+	}
+out:
+	if (ret == -EDEADLK) {
+		drm_atomic_state_clear(state);
+		drm_modeset_backoff(&ctx);
+		goto retry;
+	}
+
+	drm_atomic_state_put(state);
+
+	drm_modeset_drop_locks(&ctx);
+	drm_modeset_acquire_fini(&ctx);
+
+	return ret;
+}
+
+int drm_mode_obj_set_property_ioctl(struct drm_device *dev, void *data,
+				    struct drm_file *file_priv)
+{
+	struct drm_mode_obj_set_property *arg = data;
+	struct drm_mode_object *arg_obj;
+	struct drm_property *property;
+	int ret = -EINVAL;
+
+	if (!drm_core_check_feature(dev, DRIVER_MODESET))
+		return -EOPNOTSUPP;
+
+	arg_obj = drm_mode_object_find(dev, file_priv, arg->obj_id, arg->obj_type);
+	if (!arg_obj)
+		return -ENOENT;
+
+	if (!arg_obj->properties)
+		goto out_unref;
+
+	property = drm_mode_obj_find_prop_id(arg_obj, arg->prop_id);
+	if (!property)
+		goto out_unref;
+
+	if (drm_drv_uses_atomic_modeset(property->dev))
+		ret = set_property_atomic(arg_obj, file_priv, property, arg->value);
+	else
+		ret = set_property_legacy(arg_obj, property, arg->value);
+
+out_unref:
+	drm_mode_object_put(arg_obj);
+	return ret;
+}