Adding upstream version 6.8.9.upstream/6.8.9

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 0 insertions, 1627 deletions

diff --git a/drivers/gpu/drm/drm_bufs.c b/drivers/gpu/drm/drm_bufs.c
deleted file mode 100644
index 86700560fe..0000000000
--- a/drivers/gpu/drm/drm_bufs.c
+++ /dev/null
@@ -1,1627 +0,0 @@
-/*
- * Legacy: Generic DRM Buffer Management
- *
- * 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.
- */
-
-#include <linux/export.h>
-#include <linux/log2.h>
-#include <linux/mm.h>
-#include <linux/mman.h>
-#include <linux/nospec.h>
-#include <linux/pci.h>
-#include <linux/slab.h>
-#include <linux/uaccess.h>
-#include <linux/vmalloc.h>
-
-#include <asm/shmparam.h>
-
-#include <drm/drm_device.h>
-#include <drm/drm_drv.h>
-#include <drm/drm_file.h>
-#include <drm/drm_print.h>
-
-#include "drm_legacy.h"
-
-
-static struct drm_map_list *drm_find_matching_map(struct drm_device *dev,
-						  struct drm_local_map *map)
-{
-	struct drm_map_list *entry;
-
-	list_for_each_entry(entry, &dev->maplist, head) {
-		/*
-		 * Because the kernel-userspace ABI is fixed at a 32-bit offset
-		 * while PCI resources may live above that, we only compare the
-		 * lower 32 bits of the map offset for maps of type
-		 * _DRM_FRAMEBUFFER or _DRM_REGISTERS.
-		 * It is assumed that if a driver have more than one resource
-		 * of each type, the lower 32 bits are different.
-		 */
-		if (!entry->map ||
-		    map->type != entry->map->type ||
-		    entry->master != dev->master)
-			continue;
-		switch (map->type) {
-		case _DRM_SHM:
-			if (map->flags != _DRM_CONTAINS_LOCK)
-				break;
-			return entry;
-		case _DRM_REGISTERS:
-		case _DRM_FRAME_BUFFER:
-			if ((entry->map->offset & 0xffffffff) ==
-			    (map->offset & 0xffffffff))
-				return entry;
-			break;
-		default: /* Make gcc happy */
-			break;
-		}
-		if (entry->map->offset == map->offset)
-			return entry;
-	}
-
-	return NULL;
-}
-
-static int drm_map_handle(struct drm_device *dev, struct drm_hash_item *hash,
-			  unsigned long user_token, int hashed_handle, int shm)
-{
-	int use_hashed_handle, shift;
-	unsigned long add;
-
-#if (BITS_PER_LONG == 64)
-	use_hashed_handle = ((user_token & 0xFFFFFFFF00000000UL) || hashed_handle);
-#elif (BITS_PER_LONG == 32)
-	use_hashed_handle = hashed_handle;
-#else
-#error Unsupported long size. Neither 64 nor 32 bits.
-#endif
-
-	if (!use_hashed_handle) {
-		int ret;
-
-		hash->key = user_token >> PAGE_SHIFT;
-		ret = drm_ht_insert_item(&dev->map_hash, hash);
-		if (ret != -EINVAL)
-			return ret;
-	}
-
-	shift = 0;
-	add = DRM_MAP_HASH_OFFSET >> PAGE_SHIFT;
-	if (shm && (SHMLBA > PAGE_SIZE)) {
-		int bits = ilog2(SHMLBA >> PAGE_SHIFT) + 1;
-
-		/* For shared memory, we have to preserve the SHMLBA
-		 * bits of the eventual vma->vm_pgoff value during
-		 * mmap().  Otherwise we run into cache aliasing problems
-		 * on some platforms.  On these platforms, the pgoff of
-		 * a mmap() request is used to pick a suitable virtual
-		 * address for the mmap() region such that it will not
-		 * cause cache aliasing problems.
-		 *
-		 * Therefore, make sure the SHMLBA relevant bits of the
-		 * hash value we use are equal to those in the original
-		 * kernel virtual address.
-		 */
-		shift = bits;
-		add |= ((user_token >> PAGE_SHIFT) & ((1UL << bits) - 1UL));
-	}
-
-	return drm_ht_just_insert_please(&dev->map_hash, hash,
-					 user_token, 32 - PAGE_SHIFT - 3,
-					 shift, add);
-}
-
-/*
- * Core function to create a range of memory available for mapping by a
- * non-root process.
- *
- * Adjusts the memory offset to its absolute value according to the mapping
- * type.  Adds the map to the map list drm_device::maplist. Adds MTRR's where
- * applicable and if supported by the kernel.
- */
-static int drm_addmap_core(struct drm_device *dev, resource_size_t offset,
-			   unsigned int size, enum drm_map_type type,
-			   enum drm_map_flags flags,
-			   struct drm_map_list **maplist)
-{
-	struct drm_local_map *map;
-	struct drm_map_list *list;
-	unsigned long user_token;
-	int ret;
-
-	map = kmalloc(sizeof(*map), GFP_KERNEL);
-	if (!map)
-		return -ENOMEM;
-
-	map->offset = offset;
-	map->size = size;
-	map->flags = flags;
-	map->type = type;
-
-	/* Only allow shared memory to be removable since we only keep enough
-	 * book keeping information about shared memory to allow for removal
-	 * when processes fork.
-	 */
-	if ((map->flags & _DRM_REMOVABLE) && map->type != _DRM_SHM) {
-		kfree(map);
-		return -EINVAL;
-	}
-	DRM_DEBUG("offset = 0x%08llx, size = 0x%08lx, type = %d\n",
-		  (unsigned long long)map->offset, map->size, map->type);
-
-	/* page-align _DRM_SHM maps. They are allocated here so there is no security
-	 * hole created by that and it works around various broken drivers that use
-	 * a non-aligned quantity to map the SAREA. --BenH
-	 */
-	if (map->type == _DRM_SHM)
-		map->size = PAGE_ALIGN(map->size);
-
-	if ((map->offset & (~(resource_size_t)PAGE_MASK)) || (map->size & (~PAGE_MASK))) {
-		kfree(map);
-		return -EINVAL;
-	}
-	map->mtrr = -1;
-	map->handle = NULL;
-
-	switch (map->type) {
-	case _DRM_REGISTERS:
-	case _DRM_FRAME_BUFFER:
-#if !defined(__sparc__) && !defined(__alpha__) && !defined(__ia64__) && !defined(__powerpc64__) && !defined(__x86_64__) && !defined(__arm__)
-		if (map->offset + (map->size-1) < map->offset ||
-		    map->offset < virt_to_phys(high_memory)) {
-			kfree(map);
-			return -EINVAL;
-		}
-#endif
-		/* Some drivers preinitialize some maps, without the X Server
-		 * needing to be aware of it.  Therefore, we just return success
-		 * when the server tries to create a duplicate map.
-		 */
-		list = drm_find_matching_map(dev, map);
-		if (list != NULL) {
-			if (list->map->size != map->size) {
-				DRM_DEBUG("Matching maps of type %d with "
-					  "mismatched sizes, (%ld vs %ld)\n",
-					  map->type, map->size,
-					  list->map->size);
-				list->map->size = map->size;
-			}
-
-			kfree(map);
-			*maplist = list;
-			return 0;
-		}
-
-		if (map->type == _DRM_FRAME_BUFFER ||
-		    (map->flags & _DRM_WRITE_COMBINING)) {
-			map->mtrr =
-				arch_phys_wc_add(map->offset, map->size);
-		}
-		if (map->type == _DRM_REGISTERS) {
-			if (map->flags & _DRM_WRITE_COMBINING)
-				map->handle = ioremap_wc(map->offset,
-							 map->size);
-			else
-				map->handle = ioremap(map->offset, map->size);
-			if (!map->handle) {
-				kfree(map);
-				return -ENOMEM;
-			}
-		}
-
-		break;
-	case _DRM_SHM:
-		list = drm_find_matching_map(dev, map);
-		if (list != NULL) {
-			if (list->map->size != map->size) {
-				DRM_DEBUG("Matching maps of type %d with "
-					  "mismatched sizes, (%ld vs %ld)\n",
-					  map->type, map->size, list->map->size);
-				list->map->size = map->size;
-			}
-
-			kfree(map);
-			*maplist = list;
-			return 0;
-		}
-		map->handle = vmalloc_user(map->size);
-		DRM_DEBUG("%lu %d %p\n",
-			  map->size, order_base_2(map->size), map->handle);
-		if (!map->handle) {
-			kfree(map);
-			return -ENOMEM;
-		}
-		map->offset = (unsigned long)map->handle;
-		if (map->flags & _DRM_CONTAINS_LOCK) {
-			/* Prevent a 2nd X Server from creating a 2nd lock */
-			if (dev->master->lock.hw_lock != NULL) {
-				vfree(map->handle);
-				kfree(map);
-				return -EBUSY;
-			}
-			dev->sigdata.lock = dev->master->lock.hw_lock = map->handle;	/* Pointer to lock */
-		}
-		break;
-	case _DRM_AGP: {
-		struct drm_agp_mem *entry;
-		int valid = 0;
-
-		if (!dev->agp) {
-			kfree(map);
-			return -EINVAL;
-		}
-#ifdef __alpha__
-		map->offset += dev->hose->mem_space->start;
-#endif
-		/* In some cases (i810 driver), user space may have already
-		 * added the AGP base itself, because dev->agp->base previously
-		 * only got set during AGP enable.  So, only add the base
-		 * address if the map's offset isn't already within the
-		 * aperture.
-		 */
-		if (map->offset < dev->agp->base ||
-		    map->offset > dev->agp->base +
-		    dev->agp->agp_info.aper_size * 1024 * 1024 - 1) {
-			map->offset += dev->agp->base;
-		}
-		map->mtrr = dev->agp->agp_mtrr;	/* for getmap */
-
-		/* This assumes the DRM is in total control of AGP space.
-		 * It's not always the case as AGP can be in the control
-		 * of user space (i.e. i810 driver). So this loop will get
-		 * skipped and we double check that dev->agp->memory is
-		 * actually set as well as being invalid before EPERM'ing
-		 */
-		list_for_each_entry(entry, &dev->agp->memory, head) {
-			if ((map->offset >= entry->bound) &&
-			    (map->offset + map->size <= entry->bound + entry->pages * PAGE_SIZE)) {
-				valid = 1;
-				break;
-			}
-		}
-		if (!list_empty(&dev->agp->memory) && !valid) {
-			kfree(map);
-			return -EPERM;
-		}
-		DRM_DEBUG("AGP offset = 0x%08llx, size = 0x%08lx\n",
-			  (unsigned long long)map->offset, map->size);
-
-		break;
-	}
-	case _DRM_SCATTER_GATHER:
-		if (!dev->sg) {
-			kfree(map);
-			return -EINVAL;
-		}
-		map->offset += (unsigned long)dev->sg->virtual;
-		break;
-	case _DRM_CONSISTENT:
-		/* dma_addr_t is 64bit on i386 with CONFIG_HIGHMEM64G,
-		 * As we're limiting the address to 2^32-1 (or less),
-		 * casting it down to 32 bits is no problem, but we
-		 * need to point to a 64bit variable first.
-		 */
-		map->handle = dma_alloc_coherent(dev->dev,
-						 map->size,
-						 &map->offset,
-						 GFP_KERNEL);
-		if (!map->handle) {
-			kfree(map);
-			return -ENOMEM;
-		}
-		break;
-	default:
-		kfree(map);
-		return -EINVAL;
-	}
-
-	list = kzalloc(sizeof(*list), GFP_KERNEL);
-	if (!list) {
-		if (map->type == _DRM_REGISTERS)
-			iounmap(map->handle);
-		kfree(map);
-		return -EINVAL;
-	}
-	list->map = map;
-
-	mutex_lock(&dev->struct_mutex);
-	list_add(&list->head, &dev->maplist);
-
-	/* Assign a 32-bit handle */
-	/* We do it here so that dev->struct_mutex protects the increment */
-	user_token = (map->type == _DRM_SHM) ? (unsigned long)map->handle :
-		map->offset;
-	ret = drm_map_handle(dev, &list->hash, user_token, 0,
-			     (map->type == _DRM_SHM));
-	if (ret) {
-		if (map->type == _DRM_REGISTERS)
-			iounmap(map->handle);
-		kfree(map);
-		kfree(list);
-		mutex_unlock(&dev->struct_mutex);
-		return ret;
-	}
-
-	list->user_token = list->hash.key << PAGE_SHIFT;
-	mutex_unlock(&dev->struct_mutex);
-
-	if (!(map->flags & _DRM_DRIVER))
-		list->master = dev->master;
-	*maplist = list;
-	return 0;
-}
-
-int drm_legacy_addmap(struct drm_device *dev, resource_size_t offset,
-		      unsigned int size, enum drm_map_type type,
-		      enum drm_map_flags flags, struct drm_local_map **map_ptr)
-{
-	struct drm_map_list *list;
-	int rc;
-
-	rc = drm_addmap_core(dev, offset, size, type, flags, &list);
-	if (!rc)
-		*map_ptr = list->map;
-	return rc;
-}
-EXPORT_SYMBOL(drm_legacy_addmap);
-
-struct drm_local_map *drm_legacy_findmap(struct drm_device *dev,
-					 unsigned int token)
-{
-	struct drm_map_list *_entry;
-
-	list_for_each_entry(_entry, &dev->maplist, head)
-		if (_entry->user_token == token)
-			return _entry->map;
-	return NULL;
-}
-EXPORT_SYMBOL(drm_legacy_findmap);
-
-/*
- * Ioctl to specify a range of memory that is available for mapping by a
- * non-root process.
- *
- * \param inode device inode.
- * \param file_priv DRM file private.
- * \param cmd command.
- * \param arg pointer to a drm_map structure.
- * \return zero on success or a negative value on error.
- *
- */
-int drm_legacy_addmap_ioctl(struct drm_device *dev, void *data,
-			    struct drm_file *file_priv)
-{
-	struct drm_map *map = data;
-	struct drm_map_list *maplist;
-	int err;
-
-	if (!(capable(CAP_SYS_ADMIN) || map->type == _DRM_AGP || map->type == _DRM_SHM))
-		return -EPERM;
-
-	if (!drm_core_check_feature(dev, DRIVER_LEGACY))
-		return -EOPNOTSUPP;
-
-	err = drm_addmap_core(dev, map->offset, map->size, map->type,
-			      map->flags, &maplist);
-
-	if (err)
-		return err;
-
-	/* avoid a warning on 64-bit, this casting isn't very nice, but the API is set so too late */
-	map->handle = (void *)(unsigned long)maplist->user_token;
-
-	/*
-	 * It appears that there are no users of this value whatsoever --
-	 * drmAddMap just discards it.  Let's not encourage its use.
-	 * (Keeping drm_addmap_core's returned mtrr value would be wrong --
-	 *  it's not a real mtrr index anymore.)
-	 */
-	map->mtrr = -1;
-
-	return 0;
-}
-
-/*
- * Get a mapping information.
- *
- * \param inode device inode.
- * \param file_priv DRM file private.
- * \param cmd command.
- * \param arg user argument, pointing to a drm_map structure.
- *
- * \return zero on success or a negative number on failure.
- *
- * Searches for the mapping with the specified offset and copies its information
- * into userspace
- */
-int drm_legacy_getmap_ioctl(struct drm_device *dev, void *data,
-			    struct drm_file *file_priv)
-{
-	struct drm_map *map = data;
-	struct drm_map_list *r_list = NULL;
-	struct list_head *list;
-	int idx;
-	int i;
-
-	if (!drm_core_check_feature(dev, DRIVER_LEGACY))
-		return -EOPNOTSUPP;
-
-	idx = map->offset;
-	if (idx < 0)
-		return -EINVAL;
-
-	i = 0;
-	mutex_lock(&dev->struct_mutex);
-	list_for_each(list, &dev->maplist) {
-		if (i == idx) {
-			r_list = list_entry(list, struct drm_map_list, head);
-			break;
-		}
-		i++;
-	}
-	if (!r_list || !r_list->map) {
-		mutex_unlock(&dev->struct_mutex);
-		return -EINVAL;
-	}
-
-	map->offset = r_list->map->offset;
-	map->size = r_list->map->size;
-	map->type = r_list->map->type;
-	map->flags = r_list->map->flags;
-	map->handle = (void *)(unsigned long) r_list->user_token;
-	map->mtrr = arch_phys_wc_index(r_list->map->mtrr);
-
-	mutex_unlock(&dev->struct_mutex);
-
-	return 0;
-}
-
-/*
- * Remove a map private from list and deallocate resources if the mapping
- * isn't in use.
- *
- * Searches the map on drm_device::maplist, removes it from the list, see if
- * it's being used, and free any associated resource (such as MTRR's) if it's not
- * being on use.
- *
- * \sa drm_legacy_addmap
- */
-int drm_legacy_rmmap_locked(struct drm_device *dev, struct drm_local_map *map)
-{
-	struct drm_map_list *r_list = NULL, *list_t;
-	int found = 0;
-	struct drm_master *master;
-
-	/* Find the list entry for the map and remove it */
-	list_for_each_entry_safe(r_list, list_t, &dev->maplist, head) {
-		if (r_list->map == map) {
-			master = r_list->master;
-			list_del(&r_list->head);
-			drm_ht_remove_key(&dev->map_hash,
-					  r_list->user_token >> PAGE_SHIFT);
-			kfree(r_list);
-			found = 1;
-			break;
-		}
-	}
-
-	if (!found)
-		return -EINVAL;
-
-	switch (map->type) {
-	case _DRM_REGISTERS:
-		iounmap(map->handle);
-		fallthrough;
-	case _DRM_FRAME_BUFFER:
-		arch_phys_wc_del(map->mtrr);
-		break;
-	case _DRM_SHM:
-		vfree(map->handle);
-		if (master) {
-			if (dev->sigdata.lock == master->lock.hw_lock)
-				dev->sigdata.lock = NULL;
-			master->lock.hw_lock = NULL;   /* SHM removed */
-			master->lock.file_priv = NULL;
-			wake_up_interruptible_all(&master->lock.lock_queue);
-		}
-		break;
-	case _DRM_AGP:
-	case _DRM_SCATTER_GATHER:
-		break;
-	case _DRM_CONSISTENT:
-		dma_free_coherent(dev->dev,
-				  map->size,
-				  map->handle,
-				  map->offset);
-		break;
-	}
-	kfree(map);
-
-	return 0;
-}
-EXPORT_SYMBOL(drm_legacy_rmmap_locked);
-
-void drm_legacy_rmmap(struct drm_device *dev, struct drm_local_map *map)
-{
-	if (!drm_core_check_feature(dev, DRIVER_LEGACY))
-		return;
-
-	mutex_lock(&dev->struct_mutex);
-	drm_legacy_rmmap_locked(dev, map);
-	mutex_unlock(&dev->struct_mutex);
-}
-EXPORT_SYMBOL(drm_legacy_rmmap);
-
-void drm_legacy_master_rmmaps(struct drm_device *dev, struct drm_master *master)
-{
-	struct drm_map_list *r_list, *list_temp;
-
-	if (!drm_core_check_feature(dev, DRIVER_LEGACY))
-		return;
-
-	mutex_lock(&dev->struct_mutex);
-	list_for_each_entry_safe(r_list, list_temp, &dev->maplist, head) {
-		if (r_list->master == master) {
-			drm_legacy_rmmap_locked(dev, r_list->map);
-			r_list = NULL;
-		}
-	}
-	mutex_unlock(&dev->struct_mutex);
-}
-
-void drm_legacy_rmmaps(struct drm_device *dev)
-{
-	struct drm_map_list *r_list, *list_temp;
-
-	list_for_each_entry_safe(r_list, list_temp, &dev->maplist, head)
-		drm_legacy_rmmap(dev, r_list->map);
-}
-
-/* The rmmap ioctl appears to be unnecessary.  All mappings are torn down on
- * the last close of the device, and this is necessary for cleanup when things
- * exit uncleanly.  Therefore, having userland manually remove mappings seems
- * like a pointless exercise since they're going away anyway.
- *
- * One use case might be after addmap is allowed for normal users for SHM and
- * gets used by drivers that the server doesn't need to care about.  This seems
- * unlikely.
- *
- * \param inode device inode.
- * \param file_priv DRM file private.
- * \param cmd command.
- * \param arg pointer to a struct drm_map structure.
- * \return zero on success or a negative value on error.
- */
-int drm_legacy_rmmap_ioctl(struct drm_device *dev, void *data,
-			   struct drm_file *file_priv)
-{
-	struct drm_map *request = data;
-	struct drm_local_map *map = NULL;
-	struct drm_map_list *r_list;
-	int ret;
-
-	if (!drm_core_check_feature(dev, DRIVER_LEGACY))
-		return -EOPNOTSUPP;
-
-	mutex_lock(&dev->struct_mutex);
-	list_for_each_entry(r_list, &dev->maplist, head) {
-		if (r_list->map &&
-		    r_list->user_token == (unsigned long)request->handle &&
-		    r_list->map->flags & _DRM_REMOVABLE) {
-			map = r_list->map;
-			break;
-		}
-	}
-
-	/* List has wrapped around to the head pointer, or it's empty we didn't
-	 * find anything.
-	 */
-	if (list_empty(&dev->maplist) || !map) {
-		mutex_unlock(&dev->struct_mutex);
-		return -EINVAL;
-	}
-
-	/* Register and framebuffer maps are permanent */
-	if ((map->type == _DRM_REGISTERS) || (map->type == _DRM_FRAME_BUFFER)) {
-		mutex_unlock(&dev->struct_mutex);
-		return 0;
-	}
-
-	ret = drm_legacy_rmmap_locked(dev, map);
-
-	mutex_unlock(&dev->struct_mutex);
-
-	return ret;
-}
-
-/*
- * Cleanup after an error on one of the addbufs() functions.
- *
- * \param dev DRM device.
- * \param entry buffer entry where the error occurred.
- *
- * Frees any pages and buffers associated with the given entry.
- */
-static void drm_cleanup_buf_error(struct drm_device *dev,
-				  struct drm_buf_entry *entry)
-{
-	drm_dma_handle_t *dmah;
-	int i;
-
-	if (entry->seg_count) {
-		for (i = 0; i < entry->seg_count; i++) {
-			if (entry->seglist[i]) {
-				dmah = entry->seglist[i];
-				dma_free_coherent(dev->dev,
-						  dmah->size,
-						  dmah->vaddr,
-						  dmah->busaddr);
-				kfree(dmah);
-			}
-		}
-		kfree(entry->seglist);
-
-		entry->seg_count = 0;
-	}
-
-	if (entry->buf_count) {
-		for (i = 0; i < entry->buf_count; i++) {
-			kfree(entry->buflist[i].dev_private);
-		}
-		kfree(entry->buflist);
-
-		entry->buf_count = 0;
-	}
-}
-
-#if IS_ENABLED(CONFIG_AGP)
-/*
- * Add AGP buffers for DMA transfers.
- *
- * \param dev struct drm_device to which the buffers are to be added.
- * \param request pointer to a struct drm_buf_desc describing the request.
- * \return zero on success or a negative number on failure.
- *
- * After some sanity checks creates a drm_buf structure for each buffer and
- * reallocates the buffer list of the same size order to accommodate the new
- * buffers.
- */
-int drm_legacy_addbufs_agp(struct drm_device *dev,
-			   struct drm_buf_desc *request)
-{
-	struct drm_device_dma *dma = dev->dma;
-	struct drm_buf_entry *entry;
-	struct drm_agp_mem *agp_entry;
-	struct drm_buf *buf;
-	unsigned long offset;
-	unsigned long agp_offset;
-	int count;
-	int order;
-	int size;
-	int alignment;
-	int page_order;
-	int total;
-	int byte_count;
-	int i, valid;
-	struct drm_buf **temp_buflist;
-
-	if (!dma)
-		return -EINVAL;
-
-	count = request->count;
-	order = order_base_2(request->size);
-	size = 1 << order;
-
-	alignment = (request->flags & _DRM_PAGE_ALIGN)
-	    ? PAGE_ALIGN(size) : size;
-	page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0;
-	total = PAGE_SIZE << page_order;
-
-	byte_count = 0;
-	agp_offset = dev->agp->base + request->agp_start;
-
-	DRM_DEBUG("count:      %d\n", count);
-	DRM_DEBUG("order:      %d\n", order);
-	DRM_DEBUG("size:       %d\n", size);
-	DRM_DEBUG("agp_offset: %lx\n", agp_offset);
-	DRM_DEBUG("alignment:  %d\n", alignment);
-	DRM_DEBUG("page_order: %d\n", page_order);
-	DRM_DEBUG("total:      %d\n", total);
-
-	if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER)
-		return -EINVAL;
-
-	/* Make sure buffers are located in AGP memory that we own */
-	valid = 0;
-	list_for_each_entry(agp_entry, &dev->agp->memory, head) {
-		if ((agp_offset >= agp_entry->bound) &&
-		    (agp_offset + total * count <= agp_entry->bound + agp_entry->pages * PAGE_SIZE)) {
-			valid = 1;
-			break;
-		}
-	}
-	if (!list_empty(&dev->agp->memory) && !valid) {
-		DRM_DEBUG("zone invalid\n");
-		return -EINVAL;
-	}
-	spin_lock(&dev->buf_lock);
-	if (dev->buf_use) {
-		spin_unlock(&dev->buf_lock);
-		return -EBUSY;
-	}
-	atomic_inc(&dev->buf_alloc);
-	spin_unlock(&dev->buf_lock);
-
-	mutex_lock(&dev->struct_mutex);
-	entry = &dma->bufs[order];
-	if (entry->buf_count) {
-		mutex_unlock(&dev->struct_mutex);
-		atomic_dec(&dev->buf_alloc);
-		return -ENOMEM;	/* May only call once for each order */
-	}
-
-	if (count < 0 || count > 4096) {
-		mutex_unlock(&dev->struct_mutex);
-		atomic_dec(&dev->buf_alloc);
-		return -EINVAL;
-	}
-
-	entry->buflist = kcalloc(count, sizeof(*entry->buflist), GFP_KERNEL);
-	if (!entry->buflist) {
-		mutex_unlock(&dev->struct_mutex);
-		atomic_dec(&dev->buf_alloc);
-		return -ENOMEM;
-	}
-
-	entry->buf_size = size;
-	entry->page_order = page_order;
-
-	offset = 0;
-
-	while (entry->buf_count < count) {
-		buf = &entry->buflist[entry->buf_count];
-		buf->idx = dma->buf_count + entry->buf_count;
-		buf->total = alignment;
-		buf->order = order;
-		buf->used = 0;
-
-		buf->offset = (dma->byte_count + offset);
-		buf->bus_address = agp_offset + offset;
-		buf->address = (void *)(agp_offset + offset);
-		buf->next = NULL;
-		buf->waiting = 0;
-		buf->pending = 0;
-		buf->file_priv = NULL;
-
-		buf->dev_priv_size = dev->driver->dev_priv_size;
-		buf->dev_private = kzalloc(buf->dev_priv_size, GFP_KERNEL);
-		if (!buf->dev_private) {
-			/* Set count correctly so we free the proper amount. */
-			entry->buf_count = count;
-			drm_cleanup_buf_error(dev, entry);
-			mutex_unlock(&dev->struct_mutex);
-			atomic_dec(&dev->buf_alloc);
-			return -ENOMEM;
-		}
-
-		DRM_DEBUG("buffer %d @ %p\n", entry->buf_count, buf->address);
-
-		offset += alignment;
-		entry->buf_count++;
-		byte_count += PAGE_SIZE << page_order;
-	}
-
-	DRM_DEBUG("byte_count: %d\n", byte_count);
-
-	temp_buflist = krealloc(dma->buflist,
-				(dma->buf_count + entry->buf_count) *
-				sizeof(*dma->buflist), GFP_KERNEL);
-	if (!temp_buflist) {
-		/* Free the entry because it isn't valid */
-		drm_cleanup_buf_error(dev, entry);
-		mutex_unlock(&dev->struct_mutex);
-		atomic_dec(&dev->buf_alloc);
-		return -ENOMEM;
-	}
-	dma->buflist = temp_buflist;
-
-	for (i = 0; i < entry->buf_count; i++) {
-		dma->buflist[i + dma->buf_count] = &entry->buflist[i];
-	}
-
-	dma->buf_count += entry->buf_count;
-	dma->seg_count += entry->seg_count;
-	dma->page_count += byte_count >> PAGE_SHIFT;
-	dma->byte_count += byte_count;
-
-	DRM_DEBUG("dma->buf_count : %d\n", dma->buf_count);
-	DRM_DEBUG("entry->buf_count : %d\n", entry->buf_count);
-
-	mutex_unlock(&dev->struct_mutex);
-
-	request->count = entry->buf_count;
-	request->size = size;
-
-	dma->flags = _DRM_DMA_USE_AGP;
-
-	atomic_dec(&dev->buf_alloc);
-	return 0;
-}
-EXPORT_SYMBOL(drm_legacy_addbufs_agp);
-#endif /* CONFIG_AGP */
-
-int drm_legacy_addbufs_pci(struct drm_device *dev,
-			   struct drm_buf_desc *request)
-{
-	struct drm_device_dma *dma = dev->dma;
-	int count;
-	int order;
-	int size;
-	int total;
-	int page_order;
-	struct drm_buf_entry *entry;
-	drm_dma_handle_t *dmah;
-	struct drm_buf *buf;
-	int alignment;
-	unsigned long offset;
-	int i;
-	int byte_count;
-	int page_count;
-	unsigned long *temp_pagelist;
-	struct drm_buf **temp_buflist;
-
-	if (!drm_core_check_feature(dev, DRIVER_PCI_DMA))
-		return -EOPNOTSUPP;
-
-	if (!dma)
-		return -EINVAL;
-
-	if (!capable(CAP_SYS_ADMIN))
-		return -EPERM;
-
-	count = request->count;
-	order = order_base_2(request->size);
-	size = 1 << order;
-
-	DRM_DEBUG("count=%d, size=%d (%d), order=%d\n",
-		  request->count, request->size, size, order);
-
-	if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER)
-		return -EINVAL;
-
-	alignment = (request->flags & _DRM_PAGE_ALIGN)
-	    ? PAGE_ALIGN(size) : size;
-	page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0;
-	total = PAGE_SIZE << page_order;
-
-	spin_lock(&dev->buf_lock);
-	if (dev->buf_use) {
-		spin_unlock(&dev->buf_lock);
-		return -EBUSY;
-	}
-	atomic_inc(&dev->buf_alloc);
-	spin_unlock(&dev->buf_lock);
-
-	mutex_lock(&dev->struct_mutex);
-	entry = &dma->bufs[order];
-	if (entry->buf_count) {
-		mutex_unlock(&dev->struct_mutex);
-		atomic_dec(&dev->buf_alloc);
-		return -ENOMEM;	/* May only call once for each order */
-	}
-
-	if (count < 0 || count > 4096) {
-		mutex_unlock(&dev->struct_mutex);
-		atomic_dec(&dev->buf_alloc);
-		return -EINVAL;
-	}
-
-	entry->buflist = kcalloc(count, sizeof(*entry->buflist), GFP_KERNEL);
-	if (!entry->buflist) {
-		mutex_unlock(&dev->struct_mutex);
-		atomic_dec(&dev->buf_alloc);
-		return -ENOMEM;
-	}
-
-	entry->seglist = kcalloc(count, sizeof(*entry->seglist), GFP_KERNEL);
-	if (!entry->seglist) {
-		kfree(entry->buflist);
-		mutex_unlock(&dev->struct_mutex);
-		atomic_dec(&dev->buf_alloc);
-		return -ENOMEM;
-	}
-
-	/* Keep the original pagelist until we know all the allocations
-	 * have succeeded
-	 */
-	temp_pagelist = kmalloc_array(dma->page_count + (count << page_order),
-				      sizeof(*dma->pagelist),
-				      GFP_KERNEL);
-	if (!temp_pagelist) {
-		kfree(entry->buflist);
-		kfree(entry->seglist);
-		mutex_unlock(&dev->struct_mutex);
-		atomic_dec(&dev->buf_alloc);
-		return -ENOMEM;
-	}
-	memcpy(temp_pagelist,
-	       dma->pagelist, dma->page_count * sizeof(*dma->pagelist));
-	DRM_DEBUG("pagelist: %d entries\n",
-		  dma->page_count + (count << page_order));
-
-	entry->buf_size = size;
-	entry->page_order = page_order;
-	byte_count = 0;
-	page_count = 0;
-
-	while (entry->buf_count < count) {
-		dmah = kmalloc(sizeof(drm_dma_handle_t), GFP_KERNEL);
-		if (!dmah) {
-			/* Set count correctly so we free the proper amount. */
-			entry->buf_count = count;
-			entry->seg_count = count;
-			drm_cleanup_buf_error(dev, entry);
-			kfree(temp_pagelist);
-			mutex_unlock(&dev->struct_mutex);
-			atomic_dec(&dev->buf_alloc);
-			return -ENOMEM;
-		}
-
-		dmah->size = total;
-		dmah->vaddr = dma_alloc_coherent(dev->dev,
-						 dmah->size,
-						 &dmah->busaddr,
-						 GFP_KERNEL);
-		if (!dmah->vaddr) {
-			kfree(dmah);
-
-			/* Set count correctly so we free the proper amount. */
-			entry->buf_count = count;
-			entry->seg_count = count;
-			drm_cleanup_buf_error(dev, entry);
-			kfree(temp_pagelist);
-			mutex_unlock(&dev->struct_mutex);
-			atomic_dec(&dev->buf_alloc);
-			return -ENOMEM;
-		}
-		entry->seglist[entry->seg_count++] = dmah;
-		for (i = 0; i < (1 << page_order); i++) {
-			DRM_DEBUG("page %d @ 0x%08lx\n",
-				  dma->page_count + page_count,
-				  (unsigned long)dmah->vaddr + PAGE_SIZE * i);
-			temp_pagelist[dma->page_count + page_count++]
-				= (unsigned long)dmah->vaddr + PAGE_SIZE * i;
-		}
-		for (offset = 0;
-		     offset + size <= total && entry->buf_count < count;
-		     offset += alignment, ++entry->buf_count) {
-			buf = &entry->buflist[entry->buf_count];
-			buf->idx = dma->buf_count + entry->buf_count;
-			buf->total = alignment;
-			buf->order = order;
-			buf->used = 0;
-			buf->offset = (dma->byte_count + byte_count + offset);
-			buf->address = (void *)(dmah->vaddr + offset);
-			buf->bus_address = dmah->busaddr + offset;
-			buf->next = NULL;
-			buf->waiting = 0;
-			buf->pending = 0;
-			buf->file_priv = NULL;
-
-			buf->dev_priv_size = dev->driver->dev_priv_size;
-			buf->dev_private = kzalloc(buf->dev_priv_size,
-						GFP_KERNEL);
-			if (!buf->dev_private) {
-				/* Set count correctly so we free the proper amount. */
-				entry->buf_count = count;
-				entry->seg_count = count;
-				drm_cleanup_buf_error(dev, entry);
-				kfree(temp_pagelist);
-				mutex_unlock(&dev->struct_mutex);
-				atomic_dec(&dev->buf_alloc);
-				return -ENOMEM;
-			}
-
-			DRM_DEBUG("buffer %d @ %p\n",
-				  entry->buf_count, buf->address);
-		}
-		byte_count += PAGE_SIZE << page_order;
-	}
-
-	temp_buflist = krealloc(dma->buflist,
-				(dma->buf_count + entry->buf_count) *
-				sizeof(*dma->buflist), GFP_KERNEL);
-	if (!temp_buflist) {
-		/* Free the entry because it isn't valid */
-		drm_cleanup_buf_error(dev, entry);
-		kfree(temp_pagelist);
-		mutex_unlock(&dev->struct_mutex);
-		atomic_dec(&dev->buf_alloc);
-		return -ENOMEM;
-	}
-	dma->buflist = temp_buflist;
-
-	for (i = 0; i < entry->buf_count; i++) {
-		dma->buflist[i + dma->buf_count] = &entry->buflist[i];
-	}
-
-	/* No allocations failed, so now we can replace the original pagelist
-	 * with the new one.
-	 */
-	if (dma->page_count) {
-		kfree(dma->pagelist);
-	}
-	dma->pagelist = temp_pagelist;
-
-	dma->buf_count += entry->buf_count;
-	dma->seg_count += entry->seg_count;
-	dma->page_count += entry->seg_count << page_order;
-	dma->byte_count += PAGE_SIZE * (entry->seg_count << page_order);
-
-	mutex_unlock(&dev->struct_mutex);
-
-	request->count = entry->buf_count;
-	request->size = size;
-
-	if (request->flags & _DRM_PCI_BUFFER_RO)
-		dma->flags = _DRM_DMA_USE_PCI_RO;
-
-	atomic_dec(&dev->buf_alloc);
-	return 0;
-
-}
-EXPORT_SYMBOL(drm_legacy_addbufs_pci);
-
-static int drm_legacy_addbufs_sg(struct drm_device *dev,
-				 struct drm_buf_desc *request)
-{
-	struct drm_device_dma *dma = dev->dma;
-	struct drm_buf_entry *entry;
-	struct drm_buf *buf;
-	unsigned long offset;
-	unsigned long agp_offset;
-	int count;
-	int order;
-	int size;
-	int alignment;
-	int page_order;
-	int total;
-	int byte_count;
-	int i;
-	struct drm_buf **temp_buflist;
-
-	if (!drm_core_check_feature(dev, DRIVER_SG))
-		return -EOPNOTSUPP;
-
-	if (!dma)
-		return -EINVAL;
-
-	if (!capable(CAP_SYS_ADMIN))
-		return -EPERM;
-
-	count = request->count;
-	order = order_base_2(request->size);
-	size = 1 << order;
-
-	alignment = (request->flags & _DRM_PAGE_ALIGN)
-	    ? PAGE_ALIGN(size) : size;
-	page_order = order - PAGE_SHIFT > 0 ? order - PAGE_SHIFT : 0;
-	total = PAGE_SIZE << page_order;
-
-	byte_count = 0;
-	agp_offset = request->agp_start;
-
-	DRM_DEBUG("count:      %d\n", count);
-	DRM_DEBUG("order:      %d\n", order);
-	DRM_DEBUG("size:       %d\n", size);
-	DRM_DEBUG("agp_offset: %lu\n", agp_offset);
-	DRM_DEBUG("alignment:  %d\n", alignment);
-	DRM_DEBUG("page_order: %d\n", page_order);
-	DRM_DEBUG("total:      %d\n", total);
-
-	if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER)
-		return -EINVAL;
-
-	spin_lock(&dev->buf_lock);
-	if (dev->buf_use) {
-		spin_unlock(&dev->buf_lock);
-		return -EBUSY;
-	}
-	atomic_inc(&dev->buf_alloc);
-	spin_unlock(&dev->buf_lock);
-
-	mutex_lock(&dev->struct_mutex);
-	entry = &dma->bufs[order];
-	if (entry->buf_count) {
-		mutex_unlock(&dev->struct_mutex);
-		atomic_dec(&dev->buf_alloc);
-		return -ENOMEM;	/* May only call once for each order */
-	}
-
-	if (count < 0 || count > 4096) {
-		mutex_unlock(&dev->struct_mutex);
-		atomic_dec(&dev->buf_alloc);
-		return -EINVAL;
-	}
-
-	entry->buflist = kcalloc(count, sizeof(*entry->buflist), GFP_KERNEL);
-	if (!entry->buflist) {
-		mutex_unlock(&dev->struct_mutex);
-		atomic_dec(&dev->buf_alloc);
-		return -ENOMEM;
-	}
-
-	entry->buf_size = size;
-	entry->page_order = page_order;
-
-	offset = 0;
-
-	while (entry->buf_count < count) {
-		buf = &entry->buflist[entry->buf_count];
-		buf->idx = dma->buf_count + entry->buf_count;
-		buf->total = alignment;
-		buf->order = order;
-		buf->used = 0;
-
-		buf->offset = (dma->byte_count + offset);
-		buf->bus_address = agp_offset + offset;
-		buf->address = (void *)(agp_offset + offset
-					+ (unsigned long)dev->sg->virtual);
-		buf->next = NULL;
-		buf->waiting = 0;
-		buf->pending = 0;
-		buf->file_priv = NULL;
-
-		buf->dev_priv_size = dev->driver->dev_priv_size;
-		buf->dev_private = kzalloc(buf->dev_priv_size, GFP_KERNEL);
-		if (!buf->dev_private) {
-			/* Set count correctly so we free the proper amount. */
-			entry->buf_count = count;
-			drm_cleanup_buf_error(dev, entry);
-			mutex_unlock(&dev->struct_mutex);
-			atomic_dec(&dev->buf_alloc);
-			return -ENOMEM;
-		}
-
-		DRM_DEBUG("buffer %d @ %p\n", entry->buf_count, buf->address);
-
-		offset += alignment;
-		entry->buf_count++;
-		byte_count += PAGE_SIZE << page_order;
-	}
-
-	DRM_DEBUG("byte_count: %d\n", byte_count);
-
-	temp_buflist = krealloc(dma->buflist,
-				(dma->buf_count + entry->buf_count) *
-				sizeof(*dma->buflist), GFP_KERNEL);
-	if (!temp_buflist) {
-		/* Free the entry because it isn't valid */
-		drm_cleanup_buf_error(dev, entry);
-		mutex_unlock(&dev->struct_mutex);
-		atomic_dec(&dev->buf_alloc);
-		return -ENOMEM;
-	}
-	dma->buflist = temp_buflist;
-
-	for (i = 0; i < entry->buf_count; i++) {
-		dma->buflist[i + dma->buf_count] = &entry->buflist[i];
-	}
-
-	dma->buf_count += entry->buf_count;
-	dma->seg_count += entry->seg_count;
-	dma->page_count += byte_count >> PAGE_SHIFT;
-	dma->byte_count += byte_count;
-
-	DRM_DEBUG("dma->buf_count : %d\n", dma->buf_count);
-	DRM_DEBUG("entry->buf_count : %d\n", entry->buf_count);
-
-	mutex_unlock(&dev->struct_mutex);
-
-	request->count = entry->buf_count;
-	request->size = size;
-
-	dma->flags = _DRM_DMA_USE_SG;
-
-	atomic_dec(&dev->buf_alloc);
-	return 0;
-}
-
-/*
- * Add buffers for DMA transfers (ioctl).
- *
- * \param inode device inode.
- * \param file_priv DRM file private.
- * \param cmd command.
- * \param arg pointer to a struct drm_buf_desc request.
- * \return zero on success or a negative number on failure.
- *
- * According with the memory type specified in drm_buf_desc::flags and the
- * build options, it dispatches the call either to addbufs_agp(),
- * addbufs_sg() or addbufs_pci() for AGP, scatter-gather or consistent
- * PCI memory respectively.
- */
-int drm_legacy_addbufs(struct drm_device *dev, void *data,
-		       struct drm_file *file_priv)
-{
-	struct drm_buf_desc *request = data;
-	int ret;
-
-	if (!drm_core_check_feature(dev, DRIVER_LEGACY))
-		return -EOPNOTSUPP;
-
-	if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA))
-		return -EOPNOTSUPP;
-
-#if IS_ENABLED(CONFIG_AGP)
-	if (request->flags & _DRM_AGP_BUFFER)
-		ret = drm_legacy_addbufs_agp(dev, request);
-	else
-#endif
-	if (request->flags & _DRM_SG_BUFFER)
-		ret = drm_legacy_addbufs_sg(dev, request);
-	else if (request->flags & _DRM_FB_BUFFER)
-		ret = -EINVAL;
-	else
-		ret = drm_legacy_addbufs_pci(dev, request);
-
-	return ret;
-}
-
-/*
- * Get information about the buffer mappings.
- *
- * This was originally mean for debugging purposes, or by a sophisticated
- * client library to determine how best to use the available buffers (e.g.,
- * large buffers can be used for image transfer).
- *
- * \param inode device inode.
- * \param file_priv DRM file private.
- * \param cmd command.
- * \param arg pointer to a drm_buf_info structure.
- * \return zero on success or a negative number on failure.
- *
- * Increments drm_device::buf_use while holding the drm_device::buf_lock
- * lock, preventing of allocating more buffers after this call. Information
- * about each requested buffer is then copied into user space.
- */
-int __drm_legacy_infobufs(struct drm_device *dev,
-			void *data, int *p,
-			int (*f)(void *, int, struct drm_buf_entry *))
-{
-	struct drm_device_dma *dma = dev->dma;
-	int i;
-	int count;
-
-	if (!drm_core_check_feature(dev, DRIVER_LEGACY))
-		return -EOPNOTSUPP;
-
-	if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA))
-		return -EOPNOTSUPP;
-
-	if (!dma)
-		return -EINVAL;
-
-	spin_lock(&dev->buf_lock);
-	if (atomic_read(&dev->buf_alloc)) {
-		spin_unlock(&dev->buf_lock);
-		return -EBUSY;
-	}
-	++dev->buf_use;		/* Can't allocate more after this call */
-	spin_unlock(&dev->buf_lock);
-
-	for (i = 0, count = 0; i < DRM_MAX_ORDER + 1; i++) {
-		if (dma->bufs[i].buf_count)
-			++count;
-	}
-
-	DRM_DEBUG("count = %d\n", count);
-
-	if (*p >= count) {
-		for (i = 0, count = 0; i < DRM_MAX_ORDER + 1; i++) {
-			struct drm_buf_entry *from = &dma->bufs[i];
-
-			if (from->buf_count) {
-				if (f(data, count, from) < 0)
-					return -EFAULT;
-				DRM_DEBUG("%d %d %d %d %d\n",
-					  i,
-					  dma->bufs[i].buf_count,
-					  dma->bufs[i].buf_size,
-					  dma->bufs[i].low_mark,
-					  dma->bufs[i].high_mark);
-				++count;
-			}
-		}
-	}
-	*p = count;
-
-	return 0;
-}
-
-static int copy_one_buf(void *data, int count, struct drm_buf_entry *from)
-{
-	struct drm_buf_info *request = data;
-	struct drm_buf_desc __user *to = &request->list[count];
-	struct drm_buf_desc v = {.count = from->buf_count,
-				 .size = from->buf_size,
-				 .low_mark = from->low_mark,
-				 .high_mark = from->high_mark};
-
-	if (copy_to_user(to, &v, offsetof(struct drm_buf_desc, flags)))
-		return -EFAULT;
-	return 0;
-}
-
-int drm_legacy_infobufs(struct drm_device *dev, void *data,
-			struct drm_file *file_priv)
-{
-	struct drm_buf_info *request = data;
-
-	return __drm_legacy_infobufs(dev, data, &request->count, copy_one_buf);
-}
-
-/*
- * Specifies a low and high water mark for buffer allocation
- *
- * \param inode device inode.
- * \param file_priv DRM file private.
- * \param cmd command.
- * \param arg a pointer to a drm_buf_desc structure.
- * \return zero on success or a negative number on failure.
- *
- * Verifies that the size order is bounded between the admissible orders and
- * updates the respective drm_device_dma::bufs entry low and high water mark.
- *
- * \note This ioctl is deprecated and mostly never used.
- */
-int drm_legacy_markbufs(struct drm_device *dev, void *data,
-			struct drm_file *file_priv)
-{
-	struct drm_device_dma *dma = dev->dma;
-	struct drm_buf_desc *request = data;
-	int order;
-	struct drm_buf_entry *entry;
-
-	if (!drm_core_check_feature(dev, DRIVER_LEGACY))
-		return -EOPNOTSUPP;
-
-	if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA))
-		return -EOPNOTSUPP;
-
-	if (!dma)
-		return -EINVAL;
-
-	DRM_DEBUG("%d, %d, %d\n",
-		  request->size, request->low_mark, request->high_mark);
-	order = order_base_2(request->size);
-	if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER)
-		return -EINVAL;
-	entry = &dma->bufs[order];
-
-	if (request->low_mark < 0 || request->low_mark > entry->buf_count)
-		return -EINVAL;
-	if (request->high_mark < 0 || request->high_mark > entry->buf_count)
-		return -EINVAL;
-
-	entry->low_mark = request->low_mark;
-	entry->high_mark = request->high_mark;
-
-	return 0;
-}
-
-/*
- * Unreserve the buffers in list, previously reserved using drmDMA.
- *
- * \param inode device inode.
- * \param file_priv DRM file private.
- * \param cmd command.
- * \param arg pointer to a drm_buf_free structure.
- * \return zero on success or a negative number on failure.
- *
- * Calls free_buffer() for each used buffer.
- * This function is primarily used for debugging.
- */
-int drm_legacy_freebufs(struct drm_device *dev, void *data,
-			struct drm_file *file_priv)
-{
-	struct drm_device_dma *dma = dev->dma;
-	struct drm_buf_free *request = data;
-	int i;
-	int idx;
-	struct drm_buf *buf;
-
-	if (!drm_core_check_feature(dev, DRIVER_LEGACY))
-		return -EOPNOTSUPP;
-
-	if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA))
-		return -EOPNOTSUPP;
-
-	if (!dma)
-		return -EINVAL;
-
-	DRM_DEBUG("%d\n", request->count);
-	for (i = 0; i < request->count; i++) {
-		if (copy_from_user(&idx, &request->list[i], sizeof(idx)))
-			return -EFAULT;
-		if (idx < 0 || idx >= dma->buf_count) {
-			DRM_ERROR("Index %d (of %d max)\n",
-				  idx, dma->buf_count - 1);
-			return -EINVAL;
-		}
-		idx = array_index_nospec(idx, dma->buf_count);
-		buf = dma->buflist[idx];
-		if (buf->file_priv != file_priv) {
-			DRM_ERROR("Process %d freeing buffer not owned\n",
-				  task_pid_nr(current));
-			return -EINVAL;
-		}
-		drm_legacy_free_buffer(dev, buf);
-	}
-
-	return 0;
-}
-
-/*
- * Maps all of the DMA buffers into client-virtual space (ioctl).
- *
- * \param inode device inode.
- * \param file_priv DRM file private.
- * \param cmd command.
- * \param arg pointer to a drm_buf_map structure.
- * \return zero on success or a negative number on failure.
- *
- * Maps the AGP, SG or PCI buffer region with vm_mmap(), and copies information
- * about each buffer into user space. For PCI buffers, it calls vm_mmap() with
- * offset equal to 0, which drm_mmap() interprets as PCI buffers and calls
- * drm_mmap_dma().
- */
-int __drm_legacy_mapbufs(struct drm_device *dev, void *data, int *p,
-			 void __user **v,
-			 int (*f)(void *, int, unsigned long,
-				 struct drm_buf *),
-				 struct drm_file *file_priv)
-{
-	struct drm_device_dma *dma = dev->dma;
-	int retcode = 0;
-	unsigned long virtual;
-	int i;
-
-	if (!drm_core_check_feature(dev, DRIVER_LEGACY))
-		return -EOPNOTSUPP;
-
-	if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA))
-		return -EOPNOTSUPP;
-
-	if (!dma)
-		return -EINVAL;
-
-	spin_lock(&dev->buf_lock);
-	if (atomic_read(&dev->buf_alloc)) {
-		spin_unlock(&dev->buf_lock);
-		return -EBUSY;
-	}
-	dev->buf_use++;		/* Can't allocate more after this call */
-	spin_unlock(&dev->buf_lock);
-
-	if (*p >= dma->buf_count) {
-		if ((dev->agp && (dma->flags & _DRM_DMA_USE_AGP))
-		    || (drm_core_check_feature(dev, DRIVER_SG)
-			&& (dma->flags & _DRM_DMA_USE_SG))) {
-			struct drm_local_map *map = dev->agp_buffer_map;
-			unsigned long token = dev->agp_buffer_token;
-
-			if (!map) {
-				retcode = -EINVAL;
-				goto done;
-			}
-			virtual = vm_mmap(file_priv->filp, 0, map->size,
-					  PROT_READ | PROT_WRITE,
-					  MAP_SHARED,
-					  token);
-		} else {
-			virtual = vm_mmap(file_priv->filp, 0, dma->byte_count,
-					  PROT_READ | PROT_WRITE,
-					  MAP_SHARED, 0);
-		}
-		if (virtual > -1024UL) {
-			/* Real error */
-			retcode = (signed long)virtual;
-			goto done;
-		}
-		*v = (void __user *)virtual;
-
-		for (i = 0; i < dma->buf_count; i++) {
-			if (f(data, i, virtual, dma->buflist[i]) < 0) {
-				retcode = -EFAULT;
-				goto done;
-			}
-		}
-	}
-      done:
-	*p = dma->buf_count;
-	DRM_DEBUG("%d buffers, retcode = %d\n", *p, retcode);
-
-	return retcode;
-}
-
-static int map_one_buf(void *data, int idx, unsigned long virtual,
-			struct drm_buf *buf)
-{
-	struct drm_buf_map *request = data;
-	unsigned long address = virtual + buf->offset;	/* *** */
-
-	if (copy_to_user(&request->list[idx].idx, &buf->idx,
-			 sizeof(request->list[0].idx)))
-		return -EFAULT;
-	if (copy_to_user(&request->list[idx].total, &buf->total,
-			 sizeof(request->list[0].total)))
-		return -EFAULT;
-	if (clear_user(&request->list[idx].used, sizeof(int)))
-		return -EFAULT;
-	if (copy_to_user(&request->list[idx].address, &address,
-			 sizeof(address)))
-		return -EFAULT;
-	return 0;
-}
-
-int drm_legacy_mapbufs(struct drm_device *dev, void *data,
-		       struct drm_file *file_priv)
-{
-	struct drm_buf_map *request = data;
-
-	return __drm_legacy_mapbufs(dev, data, &request->count,
-				    &request->virtual, map_one_buf,
-				    file_priv);
-}
-
-int drm_legacy_dma_ioctl(struct drm_device *dev, void *data,
-		  struct drm_file *file_priv)
-{
-	if (!drm_core_check_feature(dev, DRIVER_LEGACY))
-		return -EOPNOTSUPP;
-
-	if (dev->driver->dma_ioctl)
-		return dev->driver->dma_ioctl(dev, data, file_priv);
-	else
-		return -EINVAL;
-}
-
-struct drm_local_map *drm_legacy_getsarea(struct drm_device *dev)
-{
-	struct drm_map_list *entry;
-
-	list_for_each_entry(entry, &dev->maplist, head) {
-		if (entry->map && entry->map->type == _DRM_SHM &&
-		    (entry->map->flags & _DRM_CONTAINS_LOCK)) {
-			return entry->map;
-		}
-	}
-	return NULL;
-}
-EXPORT_SYMBOL(drm_legacy_getsarea);