Merge branch 'linus' into release

Conflicts:
	arch/x86/kernel/cpu/cpufreq/longhaul.c

Signed-off-by: Len Brown <len.brown@intel.com>

53 files changed, 29784 insertions, 1833 deletions

diff --git a/drivers/gpu/drm/Makefile b/drivers/gpu/drm/Makefile
index 30022c4a5c1..4ec5061fa58 100644
--- a/drivers/gpu/drm/Makefile
+++ b/drivers/gpu/drm/Makefile
@@ -10,7 +10,8 @@ drm-y       :=	drm_auth.o drm_bufs.o drm_cache.o \
 		drm_lock.o drm_memory.o drm_proc.o drm_stub.o drm_vm.o \
 		drm_agpsupport.o drm_scatter.o ati_pcigart.o drm_pci.o \
 		drm_sysfs.o drm_hashtab.o drm_sman.o drm_mm.o \
-		drm_crtc.o drm_crtc_helper.o drm_modes.o drm_edid.o
+		drm_crtc.o drm_crtc_helper.o drm_modes.o drm_edid.o \
+		drm_info.o drm_debugfs.o
 
 drm-$(CONFIG_COMPAT) += drm_ioc32.o
 
diff --git a/drivers/gpu/drm/ati_pcigart.c b/drivers/gpu/drm/ati_pcigart.c
index c533d0c9ec6..628eae3e9b8 100644
--- a/drivers/gpu/drm/ati_pcigart.c
+++ b/drivers/gpu/drm/ati_pcigart.c
@@ -77,7 +77,7 @@ int drm_ati_pcigart_cleanup(struct drm_device *dev, struct drm_ati_pcigart_info
 			if (!entry->busaddr[i])
 				break;
 			pci_unmap_page(dev->pdev, entry->busaddr[i],
-					 PAGE_SIZE, PCI_DMA_TODEVICE);
+					 PAGE_SIZE, PCI_DMA_BIDIRECTIONAL);
 		}
 
 		if (gart_info->gart_table_location == DRM_ATI_GART_MAIN)
@@ -95,13 +95,14 @@ EXPORT_SYMBOL(drm_ati_pcigart_cleanup);
 
 int drm_ati_pcigart_init(struct drm_device *dev, struct drm_ati_pcigart_info *gart_info)
 {
+	struct drm_local_map *map = &gart_info->mapping;
 	struct drm_sg_mem *entry = dev->sg;
 	void *address = NULL;
 	unsigned long pages;
-	u32 *pci_gart, page_base;
+	u32 *pci_gart = NULL, page_base, gart_idx;
 	dma_addr_t bus_address = 0;
 	int i, j, ret = 0;
-	int max_pages;
+	int max_ati_pages, max_real_pages;
 
 	if (!entry) {
 		DRM_ERROR("no scatter/gather memory!\n");
@@ -117,6 +118,7 @@ int drm_ati_pcigart_init(struct drm_device *dev, struct drm_ati_pcigart_info *ga
 			goto done;
 		}
 
+		pci_gart = gart_info->table_handle->vaddr;
 		address = gart_info->table_handle->vaddr;
 		bus_address = gart_info->table_handle->busaddr;
 	} else {
@@ -127,18 +129,23 @@ int drm_ati_pcigart_init(struct drm_device *dev, struct drm_ati_pcigart_info *ga
 			  (unsigned long)address);
 	}
 
-	pci_gart = (u32 *) address;
 
-	max_pages = (gart_info->table_size / sizeof(u32));
-	pages = (entry->pages <= max_pages)
-	    ? entry->pages : max_pages;
+	max_ati_pages = (gart_info->table_size / sizeof(u32));
+	max_real_pages = max_ati_pages / (PAGE_SIZE / ATI_PCIGART_PAGE_SIZE);
+	pages = (entry->pages <= max_real_pages)
+	    ? entry->pages : max_real_pages;
 
-	memset(pci_gart, 0, max_pages * sizeof(u32));
+	if (gart_info->gart_table_location == DRM_ATI_GART_MAIN) {
+		memset(pci_gart, 0, max_ati_pages * sizeof(u32));
+	} else {
+		memset_io((void __iomem *)map->handle, 0, max_ati_pages * sizeof(u32));
+	}
 
+	gart_idx = 0;
 	for (i = 0; i < pages; i++) {
 		/* we need to support large memory configurations */
 		entry->busaddr[i] = pci_map_page(dev->pdev, entry->pagelist[i],
-						 0, PAGE_SIZE, PCI_DMA_TODEVICE);
+						 0, PAGE_SIZE, PCI_DMA_BIDIRECTIONAL);
 		if (entry->busaddr[i] == 0) {
 			DRM_ERROR("unable to map PCIGART pages!\n");
 			drm_ati_pcigart_cleanup(dev, gart_info);
@@ -149,19 +156,26 @@ int drm_ati_pcigart_init(struct drm_device *dev, struct drm_ati_pcigart_info *ga
 		page_base = (u32) entry->busaddr[i];
 
 		for (j = 0; j < (PAGE_SIZE / ATI_PCIGART_PAGE_SIZE); j++) {
+			u32 val;
+
 			switch(gart_info->gart_reg_if) {
 			case DRM_ATI_GART_IGP:
-				*pci_gart = cpu_to_le32((page_base) | 0xc);
+				val = page_base | 0xc;
 				break;
 			case DRM_ATI_GART_PCIE:
-				*pci_gart = cpu_to_le32((page_base >> 8) | 0xc);
+				val = (page_base >> 8) | 0xc;
 				break;
 			default:
 			case DRM_ATI_GART_PCI:
-				*pci_gart = cpu_to_le32(page_base);
+				val = page_base;
 				break;
 			}
-			pci_gart++;
+			if (gart_info->gart_table_location ==
+			    DRM_ATI_GART_MAIN)
+				pci_gart[gart_idx] = cpu_to_le32(val);
+			else
+				DRM_WRITE32(map, gart_idx * sizeof(u32), val);
+			gart_idx++;
 			page_base += ATI_PCIGART_PAGE_SIZE;
 		}
 	}
diff --git a/drivers/gpu/drm/drm_bufs.c b/drivers/gpu/drm/drm_bufs.c
index 12715d3c078..6d80d17f1e9 100644
--- a/drivers/gpu/drm/drm_bufs.c
+++ b/drivers/gpu/drm/drm_bufs.c
@@ -34,15 +34,17 @@
  */
 
 #include <linux/vmalloc.h>
+#include <linux/log2.h>
+#include <asm/shmparam.h>
 #include "drmP.h"
 
-unsigned long drm_get_resource_start(struct drm_device *dev, unsigned int resource)
+resource_size_t drm_get_resource_start(struct drm_device *dev, unsigned int resource)
 {
 	return pci_resource_start(dev->pdev, resource);
 }
 EXPORT_SYMBOL(drm_get_resource_start);
 
-unsigned long drm_get_resource_len(struct drm_device *dev, unsigned int resource)
+resource_size_t drm_get_resource_len(struct drm_device *dev, unsigned int resource)
 {
 	return pci_resource_len(dev->pdev, resource);
 }
@@ -50,24 +52,44 @@ unsigned long drm_get_resource_len(struct drm_device *dev, unsigned int resource
 EXPORT_SYMBOL(drm_get_resource_len);
 
 static struct drm_map_list *drm_find_matching_map(struct drm_device *dev,
-					     drm_local_map_t *map)
+						  struct drm_local_map *map)
 {
 	struct drm_map_list *entry;
 	list_for_each_entry(entry, &dev->maplist, head) {
-		if (entry->map && (entry->master == dev->primary->master) && (map->type == entry->map->type) &&
-		    ((entry->map->offset == map->offset) ||
-		     ((map->type == _DRM_SHM) && (map->flags&_DRM_CONTAINS_LOCK)))) {
+		/*
+		 * 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.
+		 */
+		if (!entry->map ||
+		    map->type != entry->map->type ||
+		    entry->master != dev->primary->master)
+			continue;
+		switch (map->type) {
+		case _DRM_SHM:
+			if (map->flags != _DRM_CONTAINS_LOCK)
+				break;
+		case _DRM_REGISTERS:
+		case _DRM_FRAME_BUFFER:
 			return entry;
+		default: /* Make gcc happy */
+			;
 		}
+		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)
+			  unsigned long user_token, int hashed_handle, int shm)
 {
-	int use_hashed_handle;
+	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)
@@ -83,30 +105,47 @@ static int drm_map_handle(struct drm_device *dev, struct drm_hash_item *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,
-					 0, DRM_MAP_HASH_OFFSET >> PAGE_SHIFT);
+					 shift, add);
 }
 
 /**
- * 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.
+ * 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, unsigned int offset,
+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_map *map;
+	struct drm_local_map *map;
 	struct drm_map_list *list;
 	drm_dma_handle_t *dmah;
 	unsigned long user_token;
@@ -129,9 +168,9 @@ static int drm_addmap_core(struct drm_device * dev, unsigned int offset,
 		drm_free(map, sizeof(*map), DRM_MEM_MAPS);
 		return -EINVAL;
 	}
-	DRM_DEBUG("offset = 0x%08lx, size = 0x%08lx, type = %d\n",
-		  map->offset, map->size, map->type);
-	if ((map->offset & (~PAGE_MASK)) || (map->size & (~PAGE_MASK))) {
+	DRM_DEBUG("offset = 0x%08llx, size = 0x%08lx, type = %d\n",
+		  (unsigned long long)map->offset, map->size, map->type);
+	if ((map->offset & (~(resource_size_t)PAGE_MASK)) || (map->size & (~PAGE_MASK))) {
 		drm_free(map, sizeof(*map), DRM_MEM_MAPS);
 		return -EINVAL;
 	}
@@ -259,7 +298,8 @@ static int drm_addmap_core(struct drm_device * dev, unsigned int offset,
 			drm_free(map, sizeof(*map), DRM_MEM_MAPS);
 			return -EPERM;
 		}
-		DRM_DEBUG("AGP offset = 0x%08lx, size = 0x%08lx\n", map->offset, map->size);
+		DRM_DEBUG("AGP offset = 0x%08llx, size = 0x%08lx\n",
+			  (unsigned long long)map->offset, map->size);
 
 		break;
 	case _DRM_GEM:
@@ -309,7 +349,8 @@ static int drm_addmap_core(struct drm_device * dev, unsigned int offset,
 	/* 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);
+	ret = drm_map_handle(dev, &list->hash, user_token, 0,
+			     (map->type == _DRM_SHM));
 	if (ret) {
 		if (map->type == _DRM_REGISTERS)
 			iounmap(map->handle);
@@ -327,9 +368,9 @@ static int drm_addmap_core(struct drm_device * dev, unsigned int offset,
 	return 0;
 	}
 
-int drm_addmap(struct drm_device * dev, unsigned int offset,
+int drm_addmap(struct drm_device * dev, resource_size_t offset,
 	       unsigned int size, enum drm_map_type type,
-	       enum drm_map_flags flags, drm_local_map_t ** map_ptr)
+	       enum drm_map_flags flags, struct drm_local_map ** map_ptr)
 {
 	struct drm_map_list *list;
 	int rc;
@@ -342,6 +383,17 @@ int drm_addmap(struct drm_device * dev, unsigned int offset,
 
 EXPORT_SYMBOL(drm_addmap);
 
+/**
+ * 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_addmap_ioctl(struct drm_device *dev, void *data,
 		     struct drm_file *file_priv)
 {
@@ -367,19 +419,13 @@ int drm_addmap_ioctl(struct drm_device *dev, void *data,
  * Remove a map private from list and deallocate resources if the mapping
  * isn't in use.
  *
- * \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.
- *
  * Searches the map on drm_device::maplist, removes it from the list, see if
  * its being used, and free any associate resource (such as MTRR's) if it's not
  * being on use.
  *
  * \sa drm_addmap
  */
-int drm_rmmap_locked(struct drm_device *dev, drm_local_map_t *map)
+int drm_rmmap_locked(struct drm_device *dev, struct drm_local_map *map)
 {
 	struct drm_map_list *r_list = NULL, *list_t;
 	drm_dma_handle_t dmah;
@@ -442,7 +488,7 @@ int drm_rmmap_locked(struct drm_device *dev, drm_local_map_t *map)
 }
 EXPORT_SYMBOL(drm_rmmap_locked);
 
-int drm_rmmap(struct drm_device *dev, drm_local_map_t *map)
+int drm_rmmap(struct drm_device *dev, struct drm_local_map *map)
 {
 	int ret;
 
@@ -462,12 +508,18 @@ EXPORT_SYMBOL(drm_rmmap);
  * 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_rmmap_ioctl(struct drm_device *dev, void *data,
 		    struct drm_file *file_priv)
 {
 	struct drm_map *request = data;
-	drm_local_map_t *map = NULL;
+	struct drm_local_map *map = NULL;
 	struct drm_map_list *r_list;
 	int ret;
 
@@ -1534,7 +1586,7 @@ int drm_mapbufs(struct drm_device *dev, void *data,
 			&& (dma->flags & _DRM_DMA_USE_SG))
 		    || (drm_core_check_feature(dev, DRIVER_FB_DMA)
 			&& (dma->flags & _DRM_DMA_USE_FB))) {
-			struct drm_map *map = dev->agp_buffer_map;
+			struct drm_local_map *map = dev->agp_buffer_map;
 			unsigned long token = dev->agp_buffer_token;
 
 			if (!map) {
diff --git a/drivers/gpu/drm/drm_context.c b/drivers/gpu/drm/drm_context.c
index 809ec0f0345..7d1e53c10d4 100644
--- a/drivers/gpu/drm/drm_context.c
+++ b/drivers/gpu/drm/drm_context.c
@@ -143,7 +143,7 @@ int drm_getsareactx(struct drm_device *dev, void *data,
 		    struct drm_file *file_priv)
 {
 	struct drm_ctx_priv_map *request = data;
-	struct drm_map *map;
+	struct drm_local_map *map;
 	struct drm_map_list *_entry;
 
 	mutex_lock(&dev->struct_mutex);
@@ -186,7 +186,7 @@ int drm_setsareactx(struct drm_device *dev, void *data,
 		    struct drm_file *file_priv)
 {
 	struct drm_ctx_priv_map *request = data;
-	struct drm_map *map = NULL;
+	struct drm_local_map *map = NULL;
 	struct drm_map_list *r_list = NULL;
 
 	mutex_lock(&dev->struct_mutex);
diff --git a/drivers/gpu/drm/drm_crtc_helper.c b/drivers/gpu/drm/drm_crtc_helper.c
index 1c3a8c55714..a04639dc633 100644
--- a/drivers/gpu/drm/drm_crtc_helper.c
+++ b/drivers/gpu/drm/drm_crtc_helper.c
@@ -42,6 +42,26 @@ static struct drm_display_mode std_modes[] = {
 		   DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC) },
 };
 
+static void drm_mode_validate_flag(struct drm_connector *connector,
+				   int flags)
+{
+	struct drm_display_mode *mode, *t;
+
+	if (flags == (DRM_MODE_FLAG_DBLSCAN | DRM_MODE_FLAG_INTERLACE))
+		return;
+
+	list_for_each_entry_safe(mode, t, &connector->modes, head) {
+		if ((mode->flags & DRM_MODE_FLAG_INTERLACE) &&
+				!(flags & DRM_MODE_FLAG_INTERLACE))
+			mode->status = MODE_NO_INTERLACE;
+		if ((mode->flags & DRM_MODE_FLAG_DBLSCAN) &&
+				!(flags & DRM_MODE_FLAG_DBLSCAN))
+			mode->status = MODE_NO_DBLESCAN;
+	}
+
+	return;
+}
+
 /**
  * drm_helper_probe_connector_modes - get complete set of display modes
  * @dev: DRM device
@@ -72,6 +92,7 @@ int drm_helper_probe_single_connector_modes(struct drm_connector *connector,
 	struct drm_connector_helper_funcs *connector_funcs =
 		connector->helper_private;
 	int count = 0;
+	int mode_flags = 0;
 
 	DRM_DEBUG("%s\n", drm_get_connector_name(connector));
 	/* set all modes to the unverified state */
@@ -96,6 +117,13 @@ int drm_helper_probe_single_connector_modes(struct drm_connector *connector,
 	if (maxX && maxY)
 		drm_mode_validate_size(dev, &connector->modes, maxX,
 				       maxY, 0);
+
+	if (connector->interlace_allowed)
+		mode_flags |= DRM_MODE_FLAG_INTERLACE;
+	if (connector->doublescan_allowed)
+		mode_flags |= DRM_MODE_FLAG_DBLSCAN;
+	drm_mode_validate_flag(connector, mode_flags);
+
 	list_for_each_entry_safe(mode, t, &connector->modes, head) {
 		if (mode->status == MODE_OK)
 			mode->status = connector_funcs->mode_valid(connector,
@@ -885,7 +913,6 @@ bool drm_helper_plugged_event(struct drm_device *dev)
 /**
  * drm_initial_config - setup a sane initial connector configuration
  * @dev: DRM device
- * @can_grow: this configuration is growable
  *
  * LOCKING:
  * Called at init time, must take mode config lock.
@@ -897,7 +924,7 @@ bool drm_helper_plugged_event(struct drm_device *dev)
  * RETURNS:
  * Zero if everything went ok, nonzero otherwise.
  */
-bool drm_helper_initial_config(struct drm_device *dev, bool can_grow)
+bool drm_helper_initial_config(struct drm_device *dev)
 {
 	struct drm_connector *connector;
 	int count = 0;
diff --git a/drivers/gpu/drm/drm_debugfs.c b/drivers/gpu/drm/drm_debugfs.c
new file mode 100644
index 00000000000..c77c6c6d9d2
--- /dev/null
+++ b/drivers/gpu/drm/drm_debugfs.c
@@ -0,0 +1,235 @@
+/**
+ * \file drm_debugfs.c
+ * debugfs support for DRM
+ *
+ * \author Ben Gamari <bgamari@gmail.com>
+ */
+
+/*
+ * Created: Sun Dec 21 13:08:50 2008 by bgamari@gmail.com
+ *
+ * Copyright 2008 Ben Gamari <bgamari@gmail.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/debugfs.h>
+#include <linux/seq_file.h>
+#include "drmP.h"
+
+#if defined(CONFIG_DEBUG_FS)
+
+/***************************************************
+ * Initialization, etc.
+ **************************************************/
+
+static struct drm_info_list drm_debugfs_list[] = {
+	{"name", drm_name_info, 0},
+	{"vm", drm_vm_info, 0},
+	{"clients", drm_clients_info, 0},
+	{"queues", drm_queues_info, 0},
+	{"bufs", drm_bufs_info, 0},
+	{"gem_names", drm_gem_name_info, DRIVER_GEM},
+	{"gem_objects", drm_gem_object_info, DRIVER_GEM},
+#if DRM_DEBUG_CODE
+	{"vma", drm_vma_info, 0},
+#endif
+};
+#define DRM_DEBUGFS_ENTRIES ARRAY_SIZE(drm_debugfs_list)
+
+
+static int drm_debugfs_open(struct inode *inode, struct file *file)
+{
+	struct drm_info_node *node = inode->i_private;
+
+	return single_open(file, node->info_ent->show, node);
+}
+
+
+static const struct file_operations drm_debugfs_fops = {
+	.owner = THIS_MODULE,
+	.open = drm_debugfs_open,
+	.read = seq_read,
+	.llseek = seq_lseek,
+	.release = single_release,
+};
+
+
+/**
+ * Initialize a given set of debugfs files for a device
+ *
+ * \param files The array of files to create
+ * \param count The number of files given
+ * \param root DRI debugfs dir entry.
+ * \param minor device minor number
+ * \return Zero on success, non-zero on failure
+ *
+ * Create a given set of debugfs files represented by an array of
+ * gdm_debugfs_lists in the given root directory.
+ */
+int drm_debugfs_create_files(struct drm_info_list *files, int count,
+			     struct dentry *root, struct drm_minor *minor)
+{
+	struct drm_device *dev = minor->dev;
+	struct dentry *ent;
+	struct drm_info_node *tmp;
+	char name[64];
+	int i, ret;
+
+	for (i = 0; i < count; i++) {
+		u32 features = files[i].driver_features;
+
+		if (features != 0 &&
+		    (dev->driver->driver_features & features) != features)
+			continue;
+
+		tmp = drm_alloc(sizeof(struct drm_info_node),
+				_DRM_DRIVER);
+		ent = debugfs_create_file(files[i].name, S_IFREG | S_IRUGO,
+					  root, tmp, &drm_debugfs_fops);
+		if (!ent) {
+			DRM_ERROR("Cannot create /debugfs/dri/%s/%s\n",
+				  name, files[i].name);
+			drm_free(tmp, sizeof(struct drm_info_node),
+				 _DRM_DRIVER);
+			ret = -1;
+			goto fail;
+		}
+
+		tmp->minor = minor;
+		tmp->dent = ent;
+		tmp->info_ent = &files[i];
+		list_add(&(tmp->list), &(minor->debugfs_nodes.list));
+	}
+	return 0;
+
+fail:
+	drm_debugfs_remove_files(files, count, minor);
+	return ret;
+}
+EXPORT_SYMBOL(drm_debugfs_create_files);
+
+/**
+ * Initialize the DRI debugfs filesystem for a device
+ *
+ * \param dev DRM device
+ * \param minor device minor number
+ * \param root DRI debugfs dir entry.
+ *
+ * Create the DRI debugfs root entry "/debugfs/dri", the device debugfs root entry
+ * "/debugfs/dri/%minor%/", and each entry in debugfs_list as
+ * "/debugfs/dri/%minor%/%name%".
+ */
+int drm_debugfs_init(struct drm_minor *minor, int minor_id,
+		     struct dentry *root)
+{
+	struc