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panthor_sched.h

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  • drm_mode_config.c 14.32 KiB
    /*
     * 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 <drm/drm_encoder.h>
    #include <drm/drm_mode_config.h>
    #include <drm/drmP.h>
    
    #include "drm_crtc_internal.h"
    #include "drm_internal.h"
    
    int drm_modeset_register_all(struct drm_device *dev)
    {
    	int ret;
    
    	ret = drm_plane_register_all(dev);
    	if (ret)
    		goto err_plane;
    
    	ret = drm_crtc_register_all(dev);
    	if  (ret)
    		goto err_crtc;
    
    	ret = drm_encoder_register_all(dev);
    	if (ret)
    		goto err_encoder;
    
    	ret = drm_connector_register_all(dev);
    	if (ret)
    		goto err_connector;
    
    	return 0;
    
    err_connector:
    	drm_encoder_unregister_all(dev);
    err_encoder:
    	drm_crtc_unregister_all(dev);
    err_crtc:
    	drm_plane_unregister_all(dev);
    err_plane:
    	return ret;
    }
    
    void drm_modeset_unregister_all(struct drm_device *dev)
    {
    	drm_connector_unregister_all(dev);
    	drm_encoder_unregister_all(dev);
    	drm_crtc_unregister_all(dev);
    	drm_plane_unregister_all(dev);
    }
    
    /**
     * drm_mode_getresources - get graphics configuration
     * @dev: drm device for the ioctl
     * @data: data pointer for the ioctl
     * @file_priv: drm file for the ioctl call
     *
     * Construct a set of configuration description structures and return
     * them to the user, including CRTC, connector and framebuffer configuration.
     *
     * Called by the user via ioctl.
     *
     * Returns:
     * Zero on success, negative errno on failure.
     */
    int drm_mode_getresources(struct drm_device *dev, void *data,
    			  struct drm_file *file_priv)
    {
    	struct drm_mode_card_res *card_res = data;
    	struct drm_framebuffer *fb;
    	struct drm_connector *connector;
    	struct drm_crtc *crtc;
    	struct drm_encoder *encoder;
    	int count, ret = 0;
    	uint32_t __user *fb_id;
    	uint32_t __user *crtc_id;
    	uint32_t __user *connector_id;
    	uint32_t __user *encoder_id;
    	struct drm_connector_list_iter conn_iter;
    
    	if (!drm_core_check_feature(dev, DRIVER_MODESET))
    		return -EOPNOTSUPP;
    
    	mutex_lock(&file_priv->fbs_lock);
    	count = 0;
    	fb_id = u64_to_user_ptr(card_res->fb_id_ptr);
    	list_for_each_entry(fb, &file_priv->fbs, filp_head) {
    		if (count < card_res->count_fbs &&
    		    put_user(fb->base.id, fb_id + count)) {
    			mutex_unlock(&file_priv->fbs_lock);
    			return -EFAULT;
    		}
    		count++;
    	}
    	card_res->count_fbs = count;
    	mutex_unlock(&file_priv->fbs_lock);
    
    	card_res->max_height = dev->mode_config.max_height;
    	card_res->min_height = dev->mode_config.min_height;
    	card_res->max_width = dev->mode_config.max_width;
    	card_res->min_width = dev->mode_config.min_width;
    
    	count = 0;
    	crtc_id = u64_to_user_ptr(card_res->crtc_id_ptr);
    	drm_for_each_crtc(crtc, dev) {
    		if (drm_lease_held(file_priv, crtc->base.id)) {
    			if (count < card_res->count_crtcs &&
    			    put_user(crtc->base.id, crtc_id + count))
    				return -EFAULT;
    			count++;
    		}
    	}
    	card_res->count_crtcs = count;
    
    	count = 0;
    	encoder_id = u64_to_user_ptr(card_res->encoder_id_ptr);
    	drm_for_each_encoder(encoder, dev) {
    		if (count < card_res->count_encoders &&
    		    put_user(encoder->base.id, encoder_id + count))
    			return -EFAULT;
    		count++;
    	}
    	card_res->count_encoders = count;
    
    	drm_connector_list_iter_begin(dev, &conn_iter);
    	count = 0;
    	connector_id = u64_to_user_ptr(card_res->connector_id_ptr);
    	drm_for_each_connector_iter(connector, &conn_iter) {
    		/* only expose writeback connectors if userspace understands them */
    		if (!file_priv->writeback_connectors &&
    		    (connector->connector_type == DRM_MODE_CONNECTOR_WRITEBACK))
    			continue;
    
    		if (drm_lease_held(file_priv, connector->base.id)) {
    			if (count < card_res->count_connectors &&
    			    put_user(connector->base.id, connector_id + count)) {
    				drm_connector_list_iter_end(&conn_iter);
    				return -EFAULT;
    			}
    			count++;
    		}
    	}
    	card_res->count_connectors = count;
    	drm_connector_list_iter_end(&conn_iter);
    
    	return ret;
    }
    
    /**
     * drm_mode_config_reset - call ->reset callbacks
     * @dev: drm device
     *
     * This functions calls all the crtc's, encoder's and connector's ->reset
     * callback. Drivers can use this in e.g. their driver load or resume code to
     * reset hardware and software state.
     */
    void drm_mode_config_reset(struct drm_device *dev)
    {
    	struct drm_crtc *crtc;
    	struct drm_plane *plane;
    	struct drm_encoder *encoder;
    	struct drm_connector *connector;
    	struct drm_connector_list_iter conn_iter;
    
    	drm_for_each_plane(plane, dev)
    		if (plane->funcs->reset)
    			plane->funcs->reset(plane);
    
    	drm_for_each_crtc(crtc, dev)
    		if (crtc->funcs->reset)
    			crtc->funcs->reset(crtc);
    
    	drm_for_each_encoder(encoder, dev)
    		if (encoder->funcs->reset)
    			encoder->funcs->reset(encoder);
    
    	drm_connector_list_iter_begin(dev, &conn_iter);
    	drm_for_each_connector_iter(connector, &conn_iter)
    		if (connector->funcs->reset)
    			connector->funcs->reset(connector);
    	drm_connector_list_iter_end(&conn_iter);
    }
    EXPORT_SYMBOL(drm_mode_config_reset);
    
    /*
     * Global properties
     */
    static const struct drm_prop_enum_list drm_plane_type_enum_list[] = {
    	{ DRM_PLANE_TYPE_OVERLAY, "Overlay" },
    	{ DRM_PLANE_TYPE_PRIMARY, "Primary" },
    	{ DRM_PLANE_TYPE_CURSOR, "Cursor" },
    };
    
    static int drm_mode_create_standard_properties(struct drm_device *dev)
    {
    	struct drm_property *prop;
    	int ret;
    
    	ret = drm_connector_create_standard_properties(dev);
    	if (ret)
    		return ret;
    
    	prop = drm_property_create_enum(dev, DRM_MODE_PROP_IMMUTABLE,
    					"type", drm_plane_type_enum_list,
    					ARRAY_SIZE(drm_plane_type_enum_list));
    	if (!prop)
    		return -ENOMEM;
    	dev->mode_config.plane_type_property = prop;
    
    	prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
    			"SRC_X", 0, UINT_MAX);
    	if (!prop)
    		return -ENOMEM;
    	dev->mode_config.prop_src_x = prop;
    
    	prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
    			"SRC_Y", 0, UINT_MAX);
    	if (!prop)
    		return -ENOMEM;
    	dev->mode_config.prop_src_y = prop;
    
    	prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
    			"SRC_W", 0, UINT_MAX);
    	if (!prop)
    		return -ENOMEM;
    	dev->mode_config.prop_src_w = prop;
    
    	prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
    			"SRC_H", 0, UINT_MAX);
    	if (!prop)
    		return -ENOMEM;
    	dev->mode_config.prop_src_h = prop;
    
    	prop = drm_property_create_signed_range(dev, DRM_MODE_PROP_ATOMIC,
    			"CRTC_X", INT_MIN, INT_MAX);
    	if (!prop)
    		return -ENOMEM;
    	dev->mode_config.prop_crtc_x = prop;
    
    	prop = drm_property_create_signed_range(dev, DRM_MODE_PROP_ATOMIC,
    			"CRTC_Y", INT_MIN, INT_MAX);
    	if (!prop)
    		return -ENOMEM;
    	dev->mode_config.prop_crtc_y = prop;
    
    	prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
    			"CRTC_W", 0, INT_MAX);
    	if (!prop)
    		return -ENOMEM;
    	dev->mode_config.prop_crtc_w = prop;
    
    	prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
    			"CRTC_H", 0, INT_MAX);
    	if (!prop)
    		return -ENOMEM;
    	dev->mode_config.prop_crtc_h = prop;
    
    	prop = drm_property_create_object(dev, DRM_MODE_PROP_ATOMIC,
    			"FB_ID", DRM_MODE_OBJECT_FB);
    	if (!prop)
    		return -ENOMEM;
    	dev->mode_config.prop_fb_id = prop;
    
    	prop = drm_property_create_signed_range(dev, DRM_MODE_PROP_ATOMIC,
    			"IN_FENCE_FD", -1, INT_MAX);
    	if (!prop)
    		return -ENOMEM;
    	dev->mode_config.prop_in_fence_fd = prop;
    
    	prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC,
    			"OUT_FENCE_PTR", 0, U64_MAX);
    	if (!prop)
    		return -ENOMEM;
    	dev->mode_config.prop_out_fence_ptr = prop;
    
    	prop = drm_property_create_object(dev, DRM_MODE_PROP_ATOMIC,
    			"CRTC_ID", DRM_MODE_OBJECT_CRTC);
    	if (!prop)
    		return -ENOMEM;
    	dev->mode_config.prop_crtc_id = prop;
    
    	prop = drm_property_create(dev, DRM_MODE_PROP_BLOB, "FB_DAMAGE_CLIPS",
    				   0);
    	if (!prop)
    		return -ENOMEM;
    	dev->mode_config.prop_fb_damage_clips = prop;
    
    	prop = drm_property_create_bool(dev, DRM_MODE_PROP_ATOMIC,
    			"ACTIVE");
    	if (!prop)
    		return -ENOMEM;
    	dev->mode_config.prop_active = prop;
    
    	prop = drm_property_create(dev,
    			DRM_MODE_PROP_ATOMIC | DRM_MODE_PROP_BLOB,
    			"MODE_ID", 0);
    	if (!prop)
    		return -ENOMEM;
    	dev->mode_config.prop_mode_id = prop;
    
    	prop = drm_property_create(dev,
    			DRM_MODE_PROP_BLOB,
    			"DEGAMMA_LUT", 0);
    	if (!prop)
    		return -ENOMEM;
    	dev->mode_config.degamma_lut_property = prop;
    
    	prop = drm_property_create_range(dev,
    			DRM_MODE_PROP_IMMUTABLE,
    			"DEGAMMA_LUT_SIZE", 0, UINT_MAX);
    	if (!prop)
    		return -ENOMEM;
    	dev->mode_config.degamma_lut_size_property = prop;
    
    	prop = drm_property_create(dev,
    			DRM_MODE_PROP_BLOB,
    			"CTM", 0);
    	if (!prop)
    		return -ENOMEM;
    	dev->mode_config.ctm_property = prop;
    
    	prop = drm_property_create(dev,
    			DRM_MODE_PROP_BLOB,
    			"GAMMA_LUT", 0);
    	if (!prop)
    		return -ENOMEM;
    	dev->mode_config.gamma_lut_property = prop;
    
    	prop = drm_property_create_range(dev,
    			DRM_MODE_PROP_IMMUTABLE,
    			"GAMMA_LUT_SIZE", 0, UINT_MAX);
    	if (!prop)
    		return -ENOMEM;
    	dev->mode_config.gamma_lut_size_property = prop;
    
    	prop = drm_property_create(dev,
    				   DRM_MODE_PROP_IMMUTABLE | DRM_MODE_PROP_BLOB,
    				   "IN_FORMATS", 0);
    	if (!prop)
    		return -ENOMEM;
    	dev->mode_config.modifiers_property = prop;
    
    	return 0;
    }
    
    /**
     * drm_mode_config_init - initialize DRM mode_configuration structure
     * @dev: DRM device
     *
     * Initialize @dev's mode_config structure, used for tracking the graphics
     * configuration of @dev.
     *
     * Since this initializes the modeset locks, no locking is possible. Which is no
     * problem, since this should happen single threaded at init time. It is the
     * driver's problem to ensure this guarantee.
     *
     */
    void drm_mode_config_init(struct drm_device *dev)
    {
    	mutex_init(&dev->mode_config.mutex);
    	drm_modeset_lock_init(&dev->mode_config.connection_mutex);
    	mutex_init(&dev->mode_config.idr_mutex);
    	mutex_init(&dev->mode_config.fb_lock);
    	mutex_init(&dev->mode_config.blob_lock);
    	INIT_LIST_HEAD(&dev->mode_config.fb_list);
    	INIT_LIST_HEAD(&dev->mode_config.crtc_list);
    	INIT_LIST_HEAD(&dev->mode_config.connector_list);
    	INIT_LIST_HEAD(&dev->mode_config.encoder_list);
    	INIT_LIST_HEAD(&dev->mode_config.property_list);
    	INIT_LIST_HEAD(&dev->mode_config.property_blob_list);
    	INIT_LIST_HEAD(&dev->mode_config.plane_list);
    	idr_init(&dev->mode_config.crtc_idr);
    	idr_init(&dev->mode_config.tile_idr);
    	ida_init(&dev->mode_config.connector_ida);
    	spin_lock_init(&dev->mode_config.connector_list_lock);
    
    	init_llist_head(&dev->mode_config.connector_free_list);
    	INIT_WORK(&dev->mode_config.connector_free_work, drm_connector_free_work_fn);
    
    	drm_mode_create_standard_properties(dev);
    
    	/* Just to be sure */
    	dev->mode_config.num_fb = 0;
    	dev->mode_config.num_connector = 0;
    	dev->mode_config.num_crtc = 0;
    	dev->mode_config.num_encoder = 0;
    	dev->mode_config.num_total_plane = 0;
    }
    EXPORT_SYMBOL(drm_mode_config_init);
    
    /**
     * drm_mode_config_cleanup - free up DRM mode_config info
     * @dev: DRM device
     *
     * Free up all the connectors and CRTCs associated with this DRM device, then
     * free up the framebuffers and associated buffer objects.
     *
     * Note that since this /should/ happen single-threaded at driver/device
     * teardown time, no locking is required. It's the driver's job to ensure that
     * this guarantee actually holds true.
     *
     * FIXME: cleanup any dangling user buffer objects too
     */
    void drm_mode_config_cleanup(struct drm_device *dev)
    {
    	struct drm_connector *connector;
    	struct drm_connector_list_iter conn_iter;
    	struct drm_crtc *crtc, *ct;
    	struct drm_encoder *encoder, *enct;
    	struct drm_framebuffer *fb, *fbt;
    	struct drm_property *property, *pt;
    	struct drm_property_blob *blob, *bt;
    	struct drm_plane *plane, *plt;
    
    	list_for_each_entry_safe(encoder, enct, &dev->mode_config.encoder_list,
    				 head) {
    		encoder->funcs->destroy(encoder);
    	}
    
    	drm_connector_list_iter_begin(dev, &conn_iter);
    	drm_for_each_connector_iter(connector, &conn_iter) {
    		/* drm_connector_list_iter holds an full reference to the
    		 * current connector itself, which means it is inherently safe
    		 * against unreferencing the current connector - but not against
    		 * deleting it right away. */
    		drm_connector_put(connector);
    	}
    	drm_connector_list_iter_end(&conn_iter);
    	/* connector_iter drops references in a work item. */
    	flush_work(&dev->mode_config.connector_free_work);
    	if (WARN_ON(!list_empty(&dev->mode_config.connector_list))) {
    		drm_connector_list_iter_begin(dev, &conn_iter);
    		drm_for_each_connector_iter(connector, &conn_iter)
    			DRM_ERROR("connector %s leaked!\n", connector->name);
    		drm_connector_list_iter_end(&conn_iter);
    	}
    
    	list_for_each_entry_safe(property, pt, &dev->mode_config.property_list,
    				 head) {
    		drm_property_destroy(dev, property);
    	}
    
    	list_for_each_entry_safe(plane, plt, &dev->mode_config.plane_list,
    				 head) {
    		plane->funcs->destroy(plane);
    	}
    
    	list_for_each_entry_safe(crtc, ct, &dev->mode_config.crtc_list, head) {
    		crtc->funcs->destroy(crtc);
    	}
    
    	list_for_each_entry_safe(blob, bt, &dev->mode_config.property_blob_list,
    				 head_global) {
    		drm_property_blob_put(blob);
    	}
    
    	/*
    	 * Single-threaded teardown context, so it's not required to grab the
    	 * fb_lock to protect against concurrent fb_list access. Contrary, it
    	 * would actually deadlock with the drm_framebuffer_cleanup function.
    	 *
    	 * Also, if there are any framebuffers left, that's a driver leak now,
    	 * so politely WARN about this.
    	 */
    	WARN_ON(!list_empty(&dev->mode_config.fb_list));
    	list_for_each_entry_safe(fb, fbt, &dev->mode_config.fb_list, head) {
    		struct drm_printer p = drm_debug_printer("[leaked fb]");
    		drm_printf(&p, "framebuffer[%u]:\n", fb->base.id);
    		drm_framebuffer_print_info(&p, 1, fb);
    		drm_framebuffer_free(&fb->base.refcount);
    	}
    
    	ida_destroy(&dev->mode_config.connector_ida);
    	idr_destroy(&dev->mode_config.tile_idr);
    	idr_destroy(&dev->mode_config.crtc_idr);
    	drm_modeset_lock_fini(&dev->mode_config.connection_mutex);
    }
    EXPORT_SYMBOL(drm_mode_config_cleanup);