Changeset View
Changeset View
Standalone View
Standalone View
sys/dev/drm/core/drm_mode_object.c
- This file was added.
/* | |||||
* 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->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 identifer | |||||
* @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->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_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. | |||||
*/ | |||||
void drm_object_attach_property(struct drm_mode_object *obj, | |||||
struct drm_property *property, | |||||
uint64_t init_val) | |||||
{ | |||||
int count = obj->properties->count; | |||||
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_value(struct drm_mode_object *obj, | |||||
struct drm_property *property, | |||||
uint64_t *val) | |||||
{ | |||||
int i; | |||||
/* 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); | |||||
for (i = 0; i < obj->properties->count; i++) { | |||||
if (obj->properties->properties[i] == property) { | |||||
*val = obj->properties->values[i]; | |||||
return 0; | |||||
} | |||||
} | |||||
return -EINVAL; | |||||
} | |||||
/** | |||||
* 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); | |||||
/* 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; | |||||
int ret = 0; | |||||
if (!drm_core_check_feature(dev, DRIVER_MODESET)) | |||||
return -EOPNOTSUPP; | |||||
drm_modeset_lock_all(dev); | |||||
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_unlock_all(dev); | |||||
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; | |||||
int ret = -EINVAL; | |||||
if (!drm_property_change_valid_get(prop, prop_value, &ref)) | |||||
return -EINVAL; | |||||
drm_modeset_lock_all(dev); | |||||
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_unlock_all(dev); | |||||
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; | |||||
} |