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Diffstat (limited to '')
| -rw-r--r-- | include/drm/drm_auth.h | 116 |
1 files changed, 116 insertions, 0 deletions
diff --git a/include/drm/drm_auth.h b/include/drm/drm_auth.h new file mode 100644 index 000000000..f99d3417f --- /dev/null +++ b/include/drm/drm_auth.h @@ -0,0 +1,116 @@ +#ifndef _DRM_AUTH_H_ +#define _DRM_AUTH_H_ + +/* + * Internal Header for the Direct Rendering Manager + * + * Copyright 2016 Intel Corporation + * + * Author: Daniel Vetter <daniel.vetter@ffwll.ch> + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice (including the next + * paragraph) shall be included in all copies or substantial portions of the + * Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR + * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, + * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR + * OTHER DEALINGS IN THE SOFTWARE. + */ + +#include <linux/idr.h> +#include <linux/kref.h> +#include <linux/wait.h> + +struct drm_file; +struct drm_hw_lock; + +/* + * Legacy DRI1 locking data structure. Only here instead of in drm_legacy.h for + * include ordering reasons. + * + * DO NOT USE. + */ +struct drm_lock_data { + struct drm_hw_lock *hw_lock; + struct drm_file *file_priv; + wait_queue_head_t lock_queue; + unsigned long lock_time; + spinlock_t spinlock; + uint32_t kernel_waiters; + uint32_t user_waiters; + int idle_has_lock; +}; + +/** + * struct drm_master - drm master structure + * + * @refcount: Refcount for this master object. + * @dev: Link back to the DRM device + * @driver_priv: Pointer to driver-private information. + * @lessor: Lease holder + * @lessee_id: id for lessees. Owners always have id 0 + * @lessee_list: other lessees of the same master + * @lessees: drm_masters leasing from this one + * @leases: Objects leased to this drm_master. + * @lessee_idr: All lessees under this owner (only used where lessor == NULL) + * + * Note that master structures are only relevant for the legacy/primary device + * nodes, hence there can only be one per device, not one per drm_minor. + */ +struct drm_master { + struct kref refcount; + struct drm_device *dev; + /** + * @unique: Unique identifier: e.g. busid. Protected by + * &drm_device.master_mutex. + */ + char *unique; + /** + * @unique_len: Length of unique field. Protected by + * &drm_device.master_mutex. + */ + int unique_len; + /** + * @magic_map: Map of used authentication tokens. Protected by + * &drm_device.master_mutex. + */ + struct idr magic_map; + void *driver_priv; + + /* Tree of display resource leases, each of which is a drm_master struct + * All of these get activated simultaneously, so drm_device master points + * at the top of the tree (for which lessor is NULL). Protected by + * &drm_device.mode_config.idr_mutex. + */ + + struct drm_master *lessor; + int lessee_id; + struct list_head lessee_list; + struct list_head lessees; + struct idr leases; + struct idr lessee_idr; + /* private: */ +#if IS_ENABLED(CONFIG_DRM_LEGACY) + struct drm_lock_data lock; +#endif +}; + +struct drm_master *drm_master_get(struct drm_master *master); +struct drm_master *drm_file_get_master(struct drm_file *file_priv); +void drm_master_put(struct drm_master **master); +bool drm_is_current_master(struct drm_file *fpriv); + +struct drm_master *drm_master_create(struct drm_device *dev); + +#endif |