1 files changed, 0 insertions, 444 deletions
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 <eric@anholt.net>
- *
- */
-
-#include <linux/version.h>
-
-#include "drmP.h"
-
-#if OS_HAS_GEM
-
-#include <linux/types.h>
-#include <linux/slab.h>
-#include <linux/mm.h>
-#include <linux/uaccess.h>
-#include <linux/fs.h>
-#include <linux/file.h>
-#include <linux/module.h>
-#include <linux/mman.h>
-#include <linux/pagemap.h>
-
-/** @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