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committed c39191feed4x
* If not the special kernel context, calls ctxbitmap_free() to free the specified context./* * Legacy: Generic DRM Contexts * * Copyright 1999, 2000 Precision Insight, Inc., Cedar Park, Texas. * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California. * All Rights Reserved. * * Author: Rickard E. (Rik) Faith <faith@valinux.com> * Author: Gareth Hughes <gareth@valinux.com> * * 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. */struct drm_ctx_list { struct list_head head; drm_context_t handle; struct drm_file *tag;};/******************************************************************//** \name Context bitmap support *//*@{*//** * Free a handle from the context bitmap. * * \param dev DRM device. * \param ctx_handle context handle. * * Clears the bit specified by \p ctx_handle in drm_device::ctx_bitmap and the entry * in drm_device::ctx_idr, while holding the drm_device::struct_mutex * lock. */void drm_legacy_ctxbitmap_free(struct drm_device * dev, int ctx_handle){ if (!drm_core_check_feature(dev, DRIVER_KMS_LEGACY_CONTEXT) && !drm_core_check_feature(dev, DRIVER_LEGACY)) return; mutex_lock(&dev->struct_mutex); idr_remove(&dev->ctx_idr, ctx_handle); mutex_unlock(&dev->struct_mutex);}/** * Context bitmap allocation. * * \param dev DRM device. * \return (non-negative) context handle on success or a negative number on failure. * * Allocate a new idr from drm_device::ctx_idr while holding the * drm_device::struct_mutex lock. */static int drm_legacy_ctxbitmap_next(struct drm_device * dev){ int ret; mutex_lock(&dev->struct_mutex); ret = idr_alloc(&dev->ctx_idr, NULL, DRM_RESERVED_CONTEXTS, 0, GFP_KERNEL); mutex_unlock(&dev->struct_mutex); return ret;}/** * Context bitmap initialization. * * \param dev DRM device. * * Initialise the drm_device::ctx_idr */void drm_legacy_ctxbitmap_init(struct drm_device * dev)