1 files changed, 97 insertions, 249 deletions

diff --git a/drivers/gpu/drm/drm_bufs.c b/drivers/gpu/drm/drm_bufs.c
index 3e257a50bf5..68175b54504 100644
--- a/drivers/gpu/drm/drm_bufs.c
+++ b/drivers/gpu/drm/drm_bufs.c
@@ -36,8 +36,9 @@
 #include <linux/vmalloc.h>
 #include <linux/slab.h>
 #include <linux/log2.h>
+#include <linux/export.h>
 #include <asm/shmparam.h>
-#include "drmP.h"
+#include <drm/drmP.h>
 
 static struct drm_map_list *drm_find_matching_map(struct drm_device *dev,
 						  struct drm_local_map *map)
@@ -46,10 +47,11 @@ static struct drm_map_list *drm_find_matching_map(struct drm_device *dev,
 	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 ignore the map
-		 * offset for maps of type _DRM_FRAMEBUFFER or _DRM_REGISTERS.
-		 * It is assumed that each driver will have only one resource of
-		 * each type.
+		 * 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 ||
@@ -59,9 +61,12 @@ static struct drm_map_list *drm_find_matching_map(struct drm_device *dev,
 		case _DRM_SHM:
 			if (map->flags != _DRM_CONTAINS_LOCK)
 				break;
+			return entry;
 		case _DRM_REGISTERS:
 		case _DRM_FRAME_BUFFER:
-			return entry;
+			if ((entry->map->offset & 0xffffffff) ==
+			    (map->offset & 0xffffffff))
+				return entry;
 		default: /* Make gcc happy */
 			;
 		}
@@ -183,9 +188,6 @@ static int drm_addmap_core(struct drm_device * dev, resource_size_t offset,
 			return -EINVAL;
 		}
 #endif
-#ifdef __alpha__
-		map->offset += dev->hose->mem_space->start;
-#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.
@@ -205,15 +207,17 @@ static int drm_addmap_core(struct drm_device * dev, resource_size_t offset,
 			return 0;
 		}
 
-		if (drm_core_has_MTRR(dev)) {
-			if (map->type == _DRM_FRAME_BUFFER ||
-			    (map->flags & _DRM_WRITE_COMBINING)) {
-				map->mtrr = mtrr_add(map->offset, map->size,
-						     MTRR_TYPE_WRCOMB, 1);
-			}
+		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) {
-			map->handle = ioremap(map->offset, map->size);
+			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;
@@ -237,7 +241,7 @@ static int drm_addmap_core(struct drm_device * dev, resource_size_t offset,
 		}
 		map->handle = vmalloc_user(map->size);
 		DRM_DEBUG("%lu %d %p\n",
-			  map->size, drm_order(map->size), map->handle);
+			  map->size, order_base_2(map->size), map->handle);
 		if (!map->handle) {
 			kfree(map);
 			return -ENOMEM;
@@ -257,7 +261,7 @@ static int drm_addmap_core(struct drm_device * dev, resource_size_t offset,
 		struct drm_agp_mem *entry;
 		int valid = 0;
 
-		if (!drm_core_has_AGP(dev)) {
+		if (!dev->agp) {
 			kfree(map);
 			return -EINVAL;
 		}
@@ -299,9 +303,6 @@ static int drm_addmap_core(struct drm_device * dev, resource_size_t offset,
 
 		break;
 	}
-	case _DRM_GEM:
-		DRM_ERROR("tried to addmap GEM object\n");
-		break;
 	case _DRM_SCATTER_GATHER:
 		if (!dev->sg) {
 			kfree(map);
@@ -362,7 +363,7 @@ static int drm_addmap_core(struct drm_device * dev, resource_size_t offset,
 		list->master = dev->primary->master;
 	*maplist = list;
 	return 0;
-	}
+}
 
 int drm_addmap(struct drm_device * dev, resource_size_t offset,
 	       unsigned int size, enum drm_map_type type,
@@ -408,6 +409,15 @@ int drm_addmap_ioctl(struct drm_device *dev, void *data,
 
 	/* 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;
 }
 
@@ -449,11 +459,7 @@ int drm_rmmap_locked(struct drm_device *dev, struct drm_local_map *map)
 		iounmap(map->handle);
 		/* FALLTHROUGH */
 	case _DRM_FRAME_BUFFER:
-		if (drm_core_has_MTRR(dev) && map->mtrr >= 0) {
-			int retcode;
-			retcode = mtrr_del(map->mtrr, map->offset, map->size);
-			DRM_DEBUG("mtrr_del=%d\n", retcode);
-		}
+		arch_phys_wc_del(map->mtrr);
 		break;
 	case _DRM_SHM:
 		vfree(map->handle);
@@ -474,9 +480,6 @@ int drm_rmmap_locked(struct drm_device *dev, struct drm_local_map *map)
 		dmah.size = map->size;
 		__drm_pci_free(dev, &dmah);
 		break;
-	case _DRM_GEM:
-		DRM_ERROR("tried to rmmap GEM object\n");
-		break;
 	}
 	kfree(map);
 
@@ -618,7 +621,7 @@ int drm_addbufs_agp(struct drm_device * dev, struct drm_buf_desc * request)
 		return -EINVAL;
 
 	count = request->count;
-	order = drm_order(request->size);
+	order = order_base_2(request->size);
 	size = 1 << order;
 
 	alignment = (request->flags & _DRM_PAGE_ALIGN)
@@ -639,8 +642,6 @@ int drm_addbufs_agp(struct drm_device * dev, struct drm_buf_desc * request)
 
 	if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER)
 		return -EINVAL;
-	if (dev->queue_count)
-		return -EBUSY;	/* Not while in use */
 
 	/* Make sure buffers are located in AGP memory that we own */
 	valid = 0;
@@ -655,13 +656,13 @@ int drm_addbufs_agp(struct drm_device * dev, struct drm_buf_desc * request)
 		DRM_DEBUG("zone invalid\n");
 		return -EINVAL;
 	}
-	spin_lock(&dev->count_lock);
+	spin_lock(&dev->buf_lock);
 	if (dev->buf_use) {
-		spin_unlock(&dev->count_lock);
+		spin_unlock(&dev->buf_lock);
 		return -EBUSY;
 	}
 	atomic_inc(&dev->buf_alloc);
-	spin_unlock(&dev->count_lock);
+	spin_unlock(&dev->buf_lock);
 
 	mutex_lock(&dev->struct_mutex);
 	entry = &dma->bufs[order];
@@ -702,7 +703,6 @@ int drm_addbufs_agp(struct drm_device * dev, struct drm_buf_desc * request)
 		buf->next = NULL;
 		buf->waiting = 0;
 		buf->pending = 0;
-		init_waitqueue_head(&buf->dma_wait);
 		buf->file_priv = NULL;
 
 		buf->dev_priv_size = dev->driver->dev_priv_size;
@@ -791,29 +791,27 @@ int drm_addbufs_pci(struct drm_device * dev, struct drm_buf_desc * request)
 		return -EPERM;
 
 	count = request->count;
-	order = drm_order(request->size);
+	order = order_base_2(request->size);
 	size = 1 << order;
 
-	DRM_DEBUG("count=%d, size=%d (%d), order=%d, queue_count=%d\n",
-		  request->count, request->size, size, order, dev->queue_count);
+	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;
-	if (dev->queue_count)
-		return -EBUSY;	/* Not while in use */
 
 	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->count_lock);
+	spin_lock(&dev->buf_lock);
 	if (dev->buf_use) {
-		spin_unlock(&dev->count_lock);
+		spin_unlock(&dev->buf_lock);
 		return -EBUSY;
 	}
 	atomic_inc(&dev->buf_alloc);
-	spin_unlock(&dev->count_lock);
+	spin_unlock(&dev->buf_lock);
 
 	mutex_lock(&dev->struct_mutex);
 	entry = &dma->bufs[order];
@@ -902,7 +900,6 @@ int drm_addbufs_pci(struct drm_device * dev, struct drm_buf_desc * request)
 			buf->next = NULL;
 			buf->waiting = 0;
 			buf->pending = 0;
-			init_waitqueue_head(&buf->dma_wait);
 			buf->file_priv = NULL;
 
 			buf->dev_priv_size = dev->driver->dev_priv_size;
@@ -996,7 +993,7 @@ static int drm_addbufs_sg(struct drm_device * dev, struct drm_buf_desc * request
 		return -EPERM;
 
 	count = request->count;
-	order = drm_order(request->size);
+	order = order_base_2(request->size);
 	size = 1 << order;
 
 	alignment = (request->flags & _DRM_PAGE_ALIGN)
@@ -1017,16 +1014,14 @@ static int drm_addbufs_sg(struct drm_device * dev, struct drm_buf_desc * request
 
 	if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER)
 		return -EINVAL;
-	if (dev->queue_count)
-		return -EBUSY;	/* Not while in use */
 
-	spin_lock(&dev->count_lock);
+	spin_lock(&dev->buf_lock);
 	if (dev->buf_use) {
-		spin_unlock(&dev->count_lock);
+		spin_unlock(&dev->buf_lock);
 		return -EBUSY;
 	}
 	atomic_inc(&dev->buf_alloc);
-	spin_unlock(&dev->count_lock);
+	spin_unlock(&dev->buf_lock);
 
 	mutex_lock(&dev->struct_mutex);
 	entry = &dma->bufs[order];
@@ -1069,7 +1064,6 @@ static int drm_addbufs_sg(struct drm_device * dev, struct drm_buf_desc * request
 		buf->next = NULL;
 		buf->waiting = 0;
 		buf->pending = 0;
-		init_waitqueue_head(&buf->dma_wait);
 		buf->file_priv = NULL;
 
 		buf->dev_priv_size = dev->driver->dev_priv_size;
@@ -1127,164 +1121,6 @@ static int drm_addbufs_sg(struct drm_device * dev, struct drm_buf_desc * request
 	return 0;
 }
 
-static int drm_addbufs_fb(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_FB_DMA))
-		return -EINVAL;
-
-	if (!dma)
-		return -EINVAL;
-
-	if (!capable(CAP_SYS_ADMIN))
-		return -EPERM;
-
-	count = request->count;
-	order = drm_order(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;
-	if (dev->queue_count)
-		return -EBUSY;	/* Not while in use */
-
-	spin_lock(&dev->count_lock);
-	if (dev->buf_use) {
-		spin_unlock(&dev->count_lock);
-		return -EBUSY;
-	}
-	atomic_inc(&dev->buf_alloc);
-	spin_unlock(&dev->count_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 = kzalloc(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;
-		init_waitqueue_head(&buf->dma_wait);
-		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_FB;
-
-	atomic_dec(&dev->buf_alloc);
-	return 0;
-}
-
-
 /**
  * Add buffers for DMA transfers (ioctl).
  *
@@ -1305,6 +1141,9 @@ int drm_addbufs(struct drm_device *dev, void *data,
 	struct drm_buf_desc *request = data;
 	int ret;
 
+	if (drm_core_check_feature(dev, DRIVER_MODESET))
+		return -EINVAL;
+
 	if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA))
 		return -EINVAL;
 
@@ -1316,7 +1155,7 @@ int drm_addbufs(struct drm_device *dev, void *data,
 	if (request->flags & _DRM_SG_BUFFER)
 		ret = drm_addbufs_sg(dev, request);
 	else if (request->flags & _DRM_FB_BUFFER)
-		ret = drm_addbufs_fb(dev, request);
+		ret = -EINVAL;
 	else
 		ret = drm_addbufs_pci(dev, request);
 
@@ -1336,7 +1175,7 @@ int drm_addbufs(struct drm_device *dev, void *data,
  * \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::count_lock
+ * 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.
  */
@@ -1348,19 +1187,22 @@ int drm_infobufs(struct drm_device *dev, void *data,
 	int i;
 	int count;
 
+	if (drm_core_check_feature(dev, DRIVER_MODESET))
+		return -EINVAL;
+
 	if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA))
 		return -EINVAL;
 
 	if (!dma)
 		return -EINVAL;
 
-	spin_lock(&dev->count_lock);
+	spin_lock(&dev->buf_lock);
 	if (atomic_read(&dev->buf_alloc)) {
-		spin_unlock(&dev->count_lock);
+		spin_unlock(&dev->buf_lock);
 		return -EBUSY;
 	}
 	++dev->buf_use;		/* Can't allocate more after this call */
-	spin_unlock(&dev->count_lock);
+	spin_unlock(&dev->buf_lock);
 
 	for (i = 0, count = 0; i < DRM_MAX_ORDER + 1; i++) {
 		if (dma->bufs[i].buf_count)
@@ -1427,6 +1269,9 @@ int drm_markbufs(struct drm_device *dev, void *data,
 	int order;
 	struct drm_buf_entry *entry;
 
+	if (drm_core_check_feature(dev, DRIVER_MODESET))
+		return -EINVAL;
+
 	if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA))
 		return -EINVAL;
 
@@ -1435,7 +1280,7 @@ int drm_markbufs(struct drm_device *dev, void *data,
 
 	DRM_DEBUG("%d, %d, %d\n",
 		  request->size, request->low_mark, request->high_mark);
-	order = drm_order(request->size);
+	order = order_base_2(request->size);
 	if (order < DRM_MIN_ORDER || order > DRM_MAX_ORDER)
 		return -EINVAL;
 	entry = &dma->bufs[order];
@@ -1472,6 +1317,9 @@ int drm_freebufs(struct drm_device *dev, void *data,
 	int idx;
 	struct drm_buf *buf;
 
+	if (drm_core_check_feature(dev, DRIVER_MODESET))
+		return -EINVAL;
+
 	if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA))
 		return -EINVAL;
 
@@ -1508,8 +1356,8 @@ int drm_freebufs(struct drm_device *dev, void *data,
  * \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 do_mmap(), and copies information
- * about each buffer into user space. For PCI buffers, it calls do_mmap() with
+ * 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() interpretes as PCI buffers and calls
  * drm_mmap_dma().
  */
@@ -1524,26 +1372,27 @@ int drm_mapbufs(struct drm_device *dev, void *data,
 	struct drm_buf_map *request = data;
 	int i;
 
+	if (drm_core_check_feature(dev, DRIVER_MODESET))
+		return -EINVAL;
+
 	if (!drm_core_check_feature(dev, DRIVER_HAVE_DMA))
 		return -EINVAL;
 
 	if (!dma)
 		return -EINVAL;
 
-	spin_lock(&dev->count_lock);
+	spin_lock(&dev->buf_lock);
 	if (atomic_read(&dev->buf_alloc)) {
-		spin_unlock(&dev->count_lock);
+		spin_unlock(&dev->buf_lock);
 		return -EBUSY;
 	}
 	dev->buf_use++;		/* Can't allocate more after this call */
-	spin_unlock(&dev->count_lock);
+	spin_unlock(&dev->buf_lock);
 
 	if (request->count >= dma->buf_count) {
-		if ((drm_core_has_AGP(dev) && (dma->flags & _DRM_DMA_USE_AGP))
+		if ((dev->agp && (dma->flags & _DRM_DMA_USE_AGP))
 		    || (drm_core_check_feature(dev, DRIVER_SG)
-			&& (dma->flags & _DRM_DMA_USE_SG))
-		    || (drm_core_check_feature(dev, DRIVER_FB_DMA)
-			&& (dma->flags & _DRM_DMA_USE_FB))) {
+			&& (dma->flags & _DRM_DMA_USE_SG))) {
 			struct drm_local_map *map = dev->agp_buffer_map;
 			unsigned long token = dev->agp_buffer_token;
 
@@ -1551,18 +1400,14 @@ int drm_mapbufs(struct drm_device *dev, void *data,
 				retcode = -EINVAL;
 				goto done;
 			}
-			down_write(&current->mm->mmap_sem);
-			virtual = do_mmap(file_priv->filp, 0, map->size,
+			virtual = vm_mmap(file_priv->filp, 0, map->size,
 					  PROT_READ | PROT_WRITE,
 					  MAP_SHARED,
 					  token);
-			up_write(&current->mm->mmap_sem);
 		} else {
-			down_write(&current->mm->mmap_sem);
-			virtual = do_mmap(file_priv->filp, 0, dma->byte_count,
+			virtual = vm_mmap(file_priv->filp, 0, dma->byte_count,
 					  PROT_READ | PROT_WRITE,
 					  MAP_SHARED, 0);
-			up_write(&current->mm->mmap_sem);
 		}
 		if (virtual > -1024UL) {
 			/* Real error */
@@ -1604,25 +1449,28 @@ int drm_mapbufs(struct drm_device *dev, void *data,
 	return retcode;
 }
 
-/**
- * Compute size order.  Returns the exponent of the smaller power of two which
- * is greater or equal to given number.
- *
- * \param size size.
- * \return order.
- *
- * \todo Can be made faster.
- */
-int drm_order(unsigned long size)
+int drm_dma_ioctl(struct drm_device *dev, void *data,
+		  struct drm_file *file_priv)
 {
-	int order;
-	unsigned long tmp;
+	if (drm_core_check_feature(dev, DRIVER_MODESET))
+		return -EINVAL;
 
-	for (order = 0, tmp = size >> 1; tmp; tmp >>= 1, order++) ;
+	if (dev->driver->dma_ioctl)
+		return dev->driver->dma_ioctl(dev, data, file_priv);
+	else
+		return -EINVAL;
+}
 
-	if (size & (size - 1))
-		++order;
+struct drm_local_map *drm_getsarea(struct drm_device *dev)
+{
+	struct drm_map_list *entry;
 
-	return order;
+	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_order);
+EXPORT_SYMBOL(drm_getsarea);