1 files changed, 0 insertions, 722 deletions

diff --git a/ANDROID_3.4.5/drivers/gpu/drm/drm_gem.c b/ANDROID_3.4.5/drivers/gpu/drm/drm_gem.c
deleted file mode 100644
index 83114b5e..00000000
--- a/ANDROID_3.4.5/drivers/gpu/drm/drm_gem.c
+++ /dev/null
@@ -1,722 +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/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>
-#include <linux/shmem_fs.h>
-#include <linux/dma-buf.h>
-#include "drmP.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.
- */
-
-/*
- * We make up offsets for buffer objects so we can recognize them at
- * mmap time.
- */
-
-/* pgoff in mmap is an unsigned long, so we need to make sure that
- * the faked up offset will fit
- */
-
-#if BITS_PER_LONG == 64
-#define DRM_FILE_PAGE_OFFSET_START ((0xFFFFFFFFUL >> PAGE_SHIFT) + 1)
-#define DRM_FILE_PAGE_OFFSET_SIZE ((0xFFFFFFFFUL >> PAGE_SHIFT) * 16)
-#else
-#define DRM_FILE_PAGE_OFFSET_START ((0xFFFFFFFUL >> PAGE_SHIFT) + 1)
-#define DRM_FILE_PAGE_OFFSET_SIZE ((0xFFFFFFFUL >> PAGE_SHIFT) * 16)
-#endif
-
-/**
- * Initialize the GEM device fields
- */
-
-int
-drm_gem_init(struct drm_device *dev)
-{
-	struct drm_gem_mm *mm;
-
-	spin_lock_init(&dev->object_name_lock);
-	idr_init(&dev->object_name_idr);
-
-	mm = kzalloc(sizeof(struct drm_gem_mm), GFP_KERNEL);
-	if (!mm) {
-		DRM_ERROR("out of memory\n");
-		return -ENOMEM;
-	}
-
-	dev->mm_private = mm;
-
-	if (drm_ht_create(&mm->offset_hash, 12)) {
-		kfree(mm);
-		return -ENOMEM;
-	}
-
-	if (drm_mm_init(&mm->offset_manager, DRM_FILE_PAGE_OFFSET_START,
-			DRM_FILE_PAGE_OFFSET_SIZE)) {
-		drm_ht_remove(&mm->offset_hash);
-		kfree(mm);
-		return -ENOMEM;
-	}
-
-	return 0;
-}
-
-void
-drm_gem_destroy(struct drm_device *dev)
-{
-	struct drm_gem_mm *mm = dev->mm_private;
-
-	drm_mm_takedown(&mm->offset_manager);
-	drm_ht_remove(&mm->offset_hash);
-	kfree(mm);
-	dev->mm_private = NULL;
-}
-
-/**
- * Initialize an already allocated GEM object of the specified size with
- * shmfs backing store.
- */
-int drm_gem_object_init(struct drm_device *dev,
-			struct drm_gem_object *obj, size_t size)
-{
-	BUG_ON((size & (PAGE_SIZE - 1)) != 0);
-
-	obj->dev = dev;
-	obj->filp = shmem_file_setup("drm mm object", size, VM_NORESERVE);
-	if (IS_ERR(obj->filp))
-		return PTR_ERR(obj->filp);
-
-	kref_init(&obj->refcount);
-	atomic_set(&obj->handle_count, 0);
-	obj->size = size;
-
-	return 0;
-}
-EXPORT_SYMBOL(drm_gem_object_init);
-
-/**
- * Initialize an already allocated GEM object of the specified size with
- * no GEM provided backing store. Instead the caller is responsible for
- * backing the object and handling it.
- */
-int drm_gem_private_object_init(struct drm_device *dev,
-			struct drm_gem_object *obj, size_t size)
-{
-	BUG_ON((size & (PAGE_SIZE - 1)) != 0);
-
-	obj->dev = dev;
-	obj->filp = NULL;
-
-	kref_init(&obj->refcount);
-	atomic_set(&obj->handle_count, 0);
-	obj->size = size;
-
-	return 0;
-}
-EXPORT_SYMBOL(drm_gem_private_object_init);
-
-/**
- * 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;
-
-	obj = kzalloc(sizeof(*obj), GFP_KERNEL);
-	if (!obj)
-		goto free;
-
-	if (drm_gem_object_init(dev, obj, size) != 0)
-		goto free;
-
-	if (dev->driver->gem_init_object != NULL &&
-	    dev->driver->gem_init_object(obj) != 0) {
-		goto fput;
-	}
-	return obj;
-fput:
-	/* Object_init mangles the global counters - readjust them. */
-	fput(obj->filp);
-free:
-	kfree(obj);
-	return NULL;
-}
-EXPORT_SYMBOL(drm_gem_object_alloc);
-
-/**
- * Removes the mapping from handle to filp for this object.
- */
-int
-drm_gem_handle_delete(struct drm_file *filp, u32 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);
-
-	if (obj->import_attach)
-		drm_prime_remove_imported_buf_handle(&filp->prime,
-				obj->import_attach->dmabuf);
-
-	if (dev->driver->gem_close_object)
-		dev->driver->gem_close_object(obj, filp);
-	drm_gem_object_handle_unreference_unlocked(obj);
-
-	return 0;
-}
-EXPORT_SYMBOL(drm_gem_handle_delete);
-
-/**
- * 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,
-		       u32 *handlep)
-{
-	struct drm_device *dev = obj->dev;
-	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, (int *)handlep);
-	spin_unlock(&file_priv->table_lock);
-	if (ret == -EAGAIN)
-		goto again;
-
-	if (ret != 0)
-		return ret;
-
-	drm_gem_object_handle_reference(obj);
-
-	if (dev->driver->gem_open_object) {
-		ret = dev->driver->gem_open_object(obj, file_priv);
-		if (ret) {
-			drm_gem_handle_delete(file_priv, *handlep);
-			return ret;
-		}
-	}
-
-	return 0;
-}
-EXPORT_SYMBOL(drm_gem_handle_create);
-
-
-/**
- * drm_gem_free_mmap_offset - release a fake mmap offset for an object
- * @obj: obj in question
- *
- * This routine frees fake offsets allocated by drm_gem_create_mmap_offset().
- */
-void
-drm_gem_free_mmap_offset(struct drm_gem_object *obj)
-{
-	struct drm_device *dev = obj->dev;
-	struct drm_gem_mm *mm = dev->mm_private;
-	struct drm_map_list *list = &obj->map_list;
-
-	drm_ht_remove_item(&mm->offset_hash, &list->hash);
-	drm_mm_put_block(list->file_offset_node);
-	kfree(list->map);
-	list->map = NULL;
-}
-EXPORT_SYMBOL(drm_gem_free_mmap_offset);
-
-/**
- * drm_gem_create_mmap_offset - create a fake mmap offset for an object
- * @obj: obj in question
- *
- * GEM memory mapping works by handing back to userspace a fake mmap offset
- * it can use in a subsequent mmap(2) call.  The DRM core code then looks
- * up the object based on the offset and sets up the various memory mapping
- * structures.
- *
- * This routine allocates and attaches a fake offset for @obj.
- */
-int
-drm_gem_create_mmap_offset(struct drm_gem_object *obj)
-{
-	struct drm_device *dev = obj->dev;
-	struct drm_gem_mm *mm = dev->mm_private;
-	struct drm_map_list *list;
-	struct drm_local_map *map;
-	int ret = 0;
-
-	/* Set the object up for mmap'ing */
-	list = &obj->map_list;
-	list->map = kzalloc(sizeof(struct drm_map_list), GFP_KERNEL);
-	if (!list->map)
-		return -ENOMEM;
-
-	map = list->map;
-	map->type = _DRM_GEM;
-	map->size = obj->size;
-	map->handle = obj;
-
-	/* Get a DRM GEM mmap offset allocated... */
-	list->file_offset_node = drm_mm_search_free(&mm->offset_manager,
-			obj->size / PAGE_SIZE, 0, 0);
-
-	if (!list->file_offset_node) {
-		DRM_ERROR("failed to allocate offset for bo %d\n", obj->name);
-		ret = -ENOSPC;
-		goto out_free_list;
-	}
-
-	list->file_offset_node = drm_mm_get_block(list->file_offset_node,
-			obj->size / PAGE_SIZE, 0);
-	if (!list->file_offset_node) {
-		ret = -ENOMEM;
-		goto out_free_list;
-	}
-
-	list->hash.key = list->file_offset_node->start;
-	ret = drm_ht_insert_item(&mm->offset_hash, &list->hash);
-	if (ret) {
-		DRM_ERROR("failed to add to map hash\n");
-		goto out_free_mm;
-	}
-
-	return 0;
-
-out_free_mm:
-	drm_mm_put_block(list->file_offset_node);
-out_free_list:
-	kfree(list->map);
-	list->map = NULL;
-
-	return ret;
-}
-EXPORT_SYMBOL(drm_gem_create_mmap_offset);
-
-/** 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,
-		      u32 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 -ENOENT;
-
-again:
-	if (idr_pre_get(&dev->object_name_idr, GFP_KERNEL) == 0) {
-		ret = -ENOMEM;
-		goto err;
-	}
-
-	spin_lock(&dev->object_name_lock);
-	if (!obj->name) {
-		ret = idr_get_new_above(&dev->object_name_idr, obj, 1,
-					&obj->name);
-		args->name = (uint64_t) obj->name;
-		spin_unlock(&dev->object_name_lock);
-
-		if (ret == -EAGAIN)
-			goto again;
-
-		if (ret != 0)
-			goto err;
-
-		/* Allocate a reference for the name table.  */
-		drm_gem_object_reference(obj);
-	} else {
-		args->name = (uint64_t) obj->name;
-		spin_unlock(&dev->object_name_lock);
-		ret = 0;
-	}
-
-err:
-	drm_gem_object_unreference_unlocked(obj);
-	return ret;
-}
-
-/**
- * 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;
-	u32 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);
-	drm_gem_object_unreference_unlocked(obj);
-	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_file *file_priv = data;
-	struct drm_gem_object *obj = ptr;
-	struct drm_device *dev = obj->dev;
-
-	if (obj->import_attach)
-		drm_prime_remove_imported_buf_handle(&file_priv->prime,
-				obj->import_attach->dmabuf);
-
-	if (dev->driver->gem_close_object)
-		dev->driver->gem_close_object(obj, file_priv);
-
-	drm_gem_object_handle_unreference_unlocked(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)
-{
-	idr_for_each(&file_private->object_idr,
-		     &drm_gem_object_release_handle, file_private);
-
-	idr_remove_all(&file_private->object_idr);
-	idr_destroy(&file_private->object_idr);
-}
-
-void
-drm_gem_object_release(struct drm_gem_object *obj)
-{
-	if (obj->filp)
-	    fput(obj->filp);
-}
-EXPORT_SYMBOL(drm_gem_object_release);
-
-/**
- * Called after the last reference to the object has been lost.
- * Must be called holding struct_ mutex
- *
- * 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);
-}
-EXPORT_SYMBOL(drm_gem_object_free);
-
-static void drm_gem_object_ref_bug(struct kref *list_kref)
-{
-	BUG();
-}
-
-/**
- * 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 drm_gem_object *obj)
-{
-	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);
-		obj->name = 0;
-		spin_unlock(&dev->object_name_lock);
-		/*
-		 * The object name held a reference to this object, drop
-		 * that now.
-		*
-		* This cannot be the last reference, since the handle holds one too.
-		 */
-		kref_put(&obj->refcount, drm_gem_object_ref_bug);
-	} else
-		spin_unlock(&dev->object_name_lock);
-
-}
-EXPORT_SYMBOL(drm_gem_object_handle_free);
-
-void drm_gem_vm_open(struct vm_area_struct *vma)
-{
-	struct drm_gem_object *obj = vma->vm_private_data;
-
-	drm_gem_object_reference(obj);
-
-	mutex_lock(&obj->dev->struct_mutex);
-	drm_vm_open_locked(vma);
-	mutex_unlock(&obj->dev->struct_mutex);
-}
-EXPORT_SYMBOL(drm_gem_vm_open);
-
-void drm_gem_vm_close(struct vm_area_struct *vma)
-{
-	struct drm_gem_object *obj = vma->vm_private_data;
-	struct drm_device *dev = obj->dev;
-
-	mutex_lock(&dev->struct_mutex);
-	drm_vm_close_locked(vma);
-	drm_gem_object_unreference(obj);
-	mutex_unlock(&dev->struct_mutex);
-}
-EXPORT_SYMBOL(drm_gem_vm_close);
-
-
-/**
- * drm_gem_mmap - memory map routine for GEM objects
- * @filp: DRM file pointer
- * @vma: VMA for the area to be mapped
- *
- * If a driver supports GEM object mapping, mmap calls on the DRM file
- * descriptor will end up here.
- *
- * If we find the object based on the offset passed in (vma->vm_pgoff will
- * contain the fake offset we created when the GTT map ioctl was called on
- * the object), we set up the driver fault handler so that any accesses
- * to the object can be trapped, to perform migration, GTT binding, surface
- * register allocation, or performance monitoring.
- */
-int drm_gem_mmap(struct file *filp, struct vm_area_struct *vma)
-{
-	struct drm_file *priv = filp->private_data;
-	struct drm_device *dev = priv->minor->dev;
-	struct drm_gem_mm *mm = dev->mm_private;
-	struct drm_local_map *map = NULL;
-	struct drm_gem_object *obj;
-	struct drm_hash_item *hash;
-	int ret = 0;
-
-	if (drm_device_is_unplugged(dev))
-		return -ENODEV;
-
-	mutex_lock(&dev->struct_mutex);
-
-	if (drm_ht_find_item(&mm->offset_hash, vma->vm_pgoff, &hash)) {
-		mutex_unlock(&dev->struct_mutex);
-		return drm_mmap(filp, vma);
-	}
-
-	map = drm_hash_entry(hash, struct drm_map_list, hash)->map;
-	if (!map ||
-	    ((map->flags & _DRM_RESTRICTED) && !capable(CAP_SYS_ADMIN))) {
-		ret =  -EPERM;
-		goto out_unlock;
-	}
-
-	/* Check for valid size. */
-	if (map->size < vma->vm_end - vma->vm_start) {
-		ret = -EINVAL;
-		goto out_unlock;
-	}
-
-	obj = map->handle;
-	if (!obj->dev->driver->gem_vm_ops) {
-		ret = -EINVAL;
-		goto out_unlock;
-	}
-
-	vma->vm_flags |= VM_RESERVED | VM_IO | VM_PFNMAP | VM_DONTEXPAND;
-	vma->vm_ops = obj->dev->driver->gem_vm_ops;
-	vma->vm_private_data = map->handle;
-	vma->vm_page_prot =  pgprot_writecombine(vm_get_page_prot(vma->vm_flags));
-
-	/* Take a ref for this mapping of the object, so that the fault
-	 * handler can dereference the mmap offset's pointer to the object.
-	 * This reference is cleaned up by the corresponding vm_close
-	 * (which should happen whether the vma was created by this call, or
-	 * by a vm_open due to mremap or partial unmap or whatever).
-	 */
-	drm_gem_object_reference(obj);
-
-	drm_vm_open_locked(vma);
-
-out_unlock:
-	mutex_unlock(&dev->struct_mutex);
-
-	return ret;
-}
-EXPORT_SYMBOL(drm_gem_mmap);