From 9dd3613073aa2491cef440725fdfa0cf1e8f1a42 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Kristian=20H=C3=B8gsberg?= Date: Tue, 17 Nov 2009 09:46:56 -0500 Subject: Drop shared-core, bsd-core, linux-core and scripts subdirs --- linux-core/drm_gem.c | 444 --------------------------------------------------- 1 file changed, 444 deletions(-) delete mode 100644 linux-core/drm_gem.c (limited to 'linux-core/drm_gem.c') diff --git a/linux-core/drm_gem.c b/linux-core/drm_gem.c deleted file mode 100644 index ce930265..00000000 --- a/linux-core/drm_gem.c +++ /dev/null @@ -1,444 +0,0 @@ -/* - * Copyright © 2008 Intel Corporation - * - * 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 - * THE AUTHORS OR COPYRIGHT HOLDERS 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. - * - * Authors: - * Eric Anholt - * - */ - -#include - -#include "drmP.h" - -#if OS_HAS_GEM - -#include -#include -#include -#include -#include -#include -#include -#include -#include - -/** @file drm_gem.c - * - * This file provides some of the base ioctls and library routines for - * the graphics memory manager implemented by each device driver. - * - * Because various devices have different requirements in terms of - * synchronization and migration strategies, implementing that is left up to - * the driver, and all that the general API provides should be generic -- - * allocating objects, reading/writing data with the cpu, freeing objects. - * Even there, platform-dependent optimizations for reading/writing data with - * the CPU mean we'll likely hook those out to driver-specific calls. However, - * the DRI2 implementation wants to have at least allocate/mmap be generic. - * - * The goal was to have swap-backed object allocation managed through - * struct file. However, file descriptors as handles to a struct file have - * two major failings: - * - Process limits prevent more than 1024 or so being used at a time by - * default. - * - Inability to allocate high fds will aggravate the X Server's select() - * handling, and likely that of many GL client applications as well. - * - * This led to a plan of using our own integer IDs (called handles, following - * DRM terminology) to mimic fds, and implement the fd syscalls we need as - * ioctls. The objects themselves will still include the struct file so - * that we can transition to fds if the required kernel infrastructure shows - * up at a later date, and as our interface with shmfs for memory allocation. - */ - -/** - * Initialize the GEM device fields - */ - -int -drm_gem_init(struct drm_device *dev) -{ - spin_lock_init(&dev->object_name_lock); - idr_init(&dev->object_name_idr); - atomic_set(&dev->object_count, 0); - atomic_set(&dev->object_memory, 0); - atomic_set(&dev->pin_count, 0); - atomic_set(&dev->pin_memory, 0); - atomic_set(&dev->gtt_count, 0); - atomic_set(&dev->gtt_memory, 0); - return 0; -} - -/** - * Allocate a GEM object of the specified size with shmfs backing store - */ -struct drm_gem_object * -drm_gem_object_alloc(struct drm_device *dev, size_t size) -{ - struct drm_gem_object *obj; - - BUG_ON((size & (PAGE_SIZE - 1)) != 0); - - obj = kcalloc(1, sizeof(*obj), GFP_KERNEL); - - obj->dev = dev; - obj->filp = shmem_file_setup("drm mm object", size, 0); - if (IS_ERR(obj->filp)) { - kfree(obj); - return NULL; - } - - kref_init(&obj->refcount); - kref_init(&obj->handlecount); - obj->size = size; - if (dev->driver->gem_init_object != NULL && - dev->driver->gem_init_object(obj) != 0) { - fput(obj->filp); - kfree(obj); - return NULL; - } - atomic_inc(&dev->object_count); - atomic_add(obj->size, &dev->object_memory); - return obj; -} -EXPORT_SYMBOL(drm_gem_object_alloc); - -/** - * Removes the mapping from handle to filp for this object. - */ -static int -drm_gem_handle_delete(struct drm_file *filp, int handle) -{ - struct drm_device *dev; - struct drm_gem_object *obj; - - /* This is gross. The idr system doesn't let us try a delete and - * return an error code. It just spews if you fail at deleting. - * So, we have to grab a lock around finding the object and then - * doing the delete on it and dropping the refcount, or the user - * could race us to double-decrement the refcount and cause a - * use-after-free later. Given the frequency of our handle lookups, - * we may want to use ida for number allocation and a hash table - * for the pointers, anyway. - */ - spin_lock(&filp->table_lock); - - /* Check if we currently have a reference on the object */ - obj = idr_find(&filp->object_idr, handle); - if (obj == NULL) { - spin_unlock(&filp->table_lock); - return -EINVAL; - } - dev = obj->dev; - - /* Release reference and decrement refcount. */ - idr_remove(&filp->object_idr, handle); - spin_unlock(&filp->table_lock); - - mutex_lock(&dev->struct_mutex); - drm_gem_object_handle_unreference(obj); - mutex_unlock(&dev->struct_mutex); - - return 0; -} - -/** - * Create a handle for this object. This adds a handle reference - * to the object, which includes a regular reference count. Callers - * will likely want to dereference the object afterwards. - */ -int -drm_gem_handle_create(struct drm_file *file_priv, - struct drm_gem_object *obj, - int *handlep) -{ - int ret; - - /* - * Get the user-visible handle using idr. - */ -again: - /* ensure there is space available to allocate a handle */ - if (idr_pre_get(&file_priv->object_idr, GFP_KERNEL) == 0) - return -ENOMEM; - - /* do the allocation under our spinlock */ - spin_lock(&file_priv->table_lock); - ret = idr_get_new_above(&file_priv->object_idr, obj, 1, handlep); - spin_unlock(&file_priv->table_lock); - if (ret == -EAGAIN) - goto again; - - if (ret != 0) - return ret; - - drm_gem_object_handle_reference(obj); - return 0; -} -EXPORT_SYMBOL(drm_gem_handle_create); - -/** Returns a reference to the object named by the handle. */ -struct drm_gem_object * -drm_gem_object_lookup(struct drm_device *dev, struct drm_file *filp, - int handle) -{ - struct drm_gem_object *obj; - - spin_lock(&filp->table_lock); - - /* Check if we currently have a reference on the object */ - obj = idr_find(&filp->object_idr, handle); - if (obj == NULL) { - spin_unlock(&filp->table_lock); - return NULL; - } - - drm_gem_object_reference(obj); - - spin_unlock(&filp->table_lock); - - return obj; -} -EXPORT_SYMBOL(drm_gem_object_lookup); - -/** - * Releases the handle to an mm object. - */ -int -drm_gem_close_ioctl(struct drm_device *dev, void *data, - struct drm_file *file_priv) -{ - struct drm_gem_close *args = data; - int ret; - - if (!(dev->driver->driver_features & DRIVER_GEM)) - return -ENODEV; - - ret = drm_gem_handle_delete(file_priv, args->handle); - - return ret; -} - -/** - * Create a global name for an object, returning the name. - * - * Note that the name does not hold a reference; when the object - * is freed, the name goes away. - */ -int -drm_gem_flink_ioctl(struct drm_device *dev, void *data, - struct drm_file *file_priv) -{ - struct drm_gem_flink *args = data; - struct drm_gem_object *obj; - int ret; - - if (!(dev->driver->driver_features & DRIVER_GEM)) - return -ENODEV; - - obj = drm_gem_object_lookup(dev, file_priv, args->handle); - if (obj == NULL) - return -EINVAL; - -again: - if (idr_pre_get(&dev->object_name_idr, GFP_KERNEL) == 0) - return -ENOMEM; - - spin_lock(&dev->object_name_lock); - if (obj->name) { - spin_unlock(&dev->object_name_lock); - return -EEXIST; - } - ret = idr_get_new_above(&dev->object_name_idr, obj, 1, - &obj->name); - spin_unlock(&dev->object_name_lock); - if (ret == -EAGAIN) - goto again; - - if (ret != 0) { - mutex_lock(&dev->struct_mutex); - drm_gem_object_unreference(obj); - mutex_unlock(&dev->struct_mutex); - return ret; - } - - /* - * Leave the reference from the lookup around as the - * name table now holds one - */ - args->name = (uint64_t) obj->name; - - return 0; -} - -/** - * Open an object using the global name, returning a handle and the size. - * - * This handle (of course) holds a reference to the object, so the object - * will not go away until the handle is deleted. - */ -int -drm_gem_open_ioctl(struct drm_device *dev, void *data, - struct drm_file *file_priv) -{ - struct drm_gem_open *args = data; - struct drm_gem_object *obj; - int ret; - int handle; - - if (!(dev->driver->driver_features & DRIVER_GEM)) - return -ENODEV; - - spin_lock(&dev->object_name_lock); - obj = idr_find(&dev->object_name_idr, (int) args->name); - if (obj) - drm_gem_object_reference(obj); - spin_unlock(&dev->object_name_lock); - if (!obj) - return -ENOENT; - - ret = drm_gem_handle_create(file_priv, obj, &handle); - mutex_lock(&dev->struct_mutex); - drm_gem_object_unreference(obj); - mutex_unlock(&dev->struct_mutex); - if (ret) - return ret; - - args->handle = handle; - args->size = obj->size; - - return 0; -} - -/** - * Called at device open time, sets up the structure for handling refcounting - * of mm objects. - */ -void -drm_gem_open(struct drm_device *dev, struct drm_file *file_private) -{ - idr_init(&file_private->object_idr); - spin_lock_init(&file_private->table_lock); -} - -/** - * Called at device close to release the file's - * handle references on objects. - */ -static int -drm_gem_object_release_handle(int id, void *ptr, void *data) -{ - struct drm_gem_object *obj = ptr; - - drm_gem_object_handle_unreference(obj); - - return 0; -} - -/** - * Called at close time when the filp is going away. - * - * Releases any remaining references on objects by this filp. - */ -void -drm_gem_release(struct drm_device *dev, struct drm_file *file_private) -{ - mutex_lock(&dev->struct_mutex); - idr_for_each(&file_private->object_idr, - &drm_gem_object_release_handle, NULL); - - idr_destroy(&file_private->object_idr); - mutex_unlock(&dev->struct_mutex); -} - -/** - * Called after the last reference to the object has been lost. - * - * Frees the object - */ -void -drm_gem_object_free(struct kref *kref) -{ - struct drm_gem_object *obj = (struct drm_gem_object *) kref; - struct drm_device *dev = obj->dev; - - BUG_ON(!mutex_is_locked(&dev->struct_mutex)); - - if (dev->driver->gem_free_object != NULL) - dev->driver->gem_free_object(obj); - - fput(obj->filp); - atomic_dec(&dev->object_count); - atomic_sub(obj->size, &dev->object_memory); - kfree(obj); -} -EXPORT_SYMBOL(drm_gem_object_free); - -/** - * Called after the last handle to the object has been closed - * - * Removes any name for the object. Note that this must be - * called before drm_gem_object_free or we'll be touching - * freed memory - */ -void -drm_gem_object_handle_free(struct kref *kref) -{ - struct drm_gem_object *obj = container_of(kref, - struct drm_gem_object, - handlecount); - struct drm_device *dev = obj->dev; - - /* Remove any name for this object */ - spin_lock(&dev->object_name_lock); - if (obj->name) { - idr_remove(&dev->object_name_idr, obj->name); - spin_unlock(&dev->object_name_lock); - /* - * The object name held a reference to this object, drop - * that now. - */ - drm_gem_object_unreference(obj); - } else - spin_unlock(&dev->object_name_lock); - -} -EXPORT_SYMBOL(drm_gem_object_handle_free); - -#else - -int drm_gem_init(struct drm_device *dev) -{ - return 0; -} - -void drm_gem_open(struct drm_device *dev, struct drm_file *file_private) -{ - -} - -void -drm_gem_release(struct drm_device *dev, struct drm_file *file_private) -{ - -} - -#endif -- cgit v1.2.3