Adding upstream version 5.10.209.upstream/5.10.209upstream

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

10 files changed, 2483 insertions, 0 deletions

diff --git a/include/drm/ttm/ttm_bo_api.h b/include/drm/ttm/ttm_bo_api.h
new file mode 100644
index 000000000..09ccfee48
--- /dev/null
+++ b/include/drm/ttm/ttm_bo_api.h
@@ -0,0 +1,663 @@
+/**************************************************************************
+ *
+ * Copyright (c) 2006-2009 VMware, Inc., Palo Alto, CA., USA
+ * All Rights Reserved.
+ *
+ * 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, sub license, 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 NON-INFRINGEMENT. IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDERS, AUTHORS 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.
+ *
+ **************************************************************************/
+/*
+ * Authors: Thomas Hellstrom <thellstrom-at-vmware-dot-com>
+ */
+
+#ifndef _TTM_BO_API_H_
+#define _TTM_BO_API_H_
+
+#include <drm/drm_gem.h>
+#include <drm/drm_hashtab.h>
+#include <drm/drm_vma_manager.h>
+#include <linux/kref.h>
+#include <linux/list.h>
+#include <linux/wait.h>
+#include <linux/mutex.h>
+#include <linux/mm.h>
+#include <linux/bitmap.h>
+#include <linux/dma-resv.h>
+
+#include "ttm_resource.h"
+
+struct ttm_bo_global;
+
+struct ttm_bo_device;
+
+struct drm_mm_node;
+
+struct ttm_placement;
+
+struct ttm_place;
+
+struct ttm_lru_bulk_move;
+
+/**
+ * enum ttm_bo_type
+ *
+ * @ttm_bo_type_device:	These are 'normal' buffers that can
+ * be mmapped by user space. Each of these bos occupy a slot in the
+ * device address space, that can be used for normal vm operations.
+ *
+ * @ttm_bo_type_kernel: These buffers are like ttm_bo_type_device buffers,
+ * but they cannot be accessed from user-space. For kernel-only use.
+ *
+ * @ttm_bo_type_sg: Buffer made from dmabuf sg table shared with another
+ * driver.
+ */
+
+enum ttm_bo_type {
+	ttm_bo_type_device,
+	ttm_bo_type_kernel,
+	ttm_bo_type_sg
+};
+
+struct ttm_tt;
+
+/**
+ * struct ttm_buffer_object
+ *
+ * @base: drm_gem_object superclass data.
+ * @bdev: Pointer to the buffer object device structure.
+ * @type: The bo type.
+ * @destroy: Destruction function. If NULL, kfree is used.
+ * @num_pages: Actual number of pages.
+ * @acc_size: Accounted size for this object.
+ * @kref: Reference count of this buffer object. When this refcount reaches
+ * zero, the object is destroyed or put on the delayed delete list.
+ * @mem: structure describing current placement.
+ * @persistent_swap_storage: Usually the swap storage is deleted for buffers
+ * pinned in physical memory. If this behaviour is not desired, this member
+ * holds a pointer to a persistent shmem object.
+ * @ttm: TTM structure holding system pages.
+ * @evicted: Whether the object was evicted without user-space knowing.
+ * @deleted: True if the object is only a zombie and already deleted.
+ * @lru: List head for the lru list.
+ * @ddestroy: List head for the delayed destroy list.
+ * @swap: List head for swap LRU list.
+ * @moving: Fence set when BO is moving
+ * @offset: The current GPU offset, which can have different meanings
+ * depending on the memory type. For SYSTEM type memory, it should be 0.
+ * @cur_placement: Hint of current placement.
+ *
+ * Base class for TTM buffer object, that deals with data placement and CPU
+ * mappings. GPU mappings are really up to the driver, but for simpler GPUs
+ * the driver can usually use the placement offset @offset directly as the
+ * GPU virtual address. For drivers implementing multiple
+ * GPU memory manager contexts, the driver should manage the address space
+ * in these contexts separately and use these objects to get the correct
+ * placement and caching for these GPU maps. This makes it possible to use
+ * these objects for even quite elaborate memory management schemes.
+ * The destroy member, the API visibility of this object makes it possible
+ * to derive driver specific types.
+ */
+
+struct ttm_buffer_object {
+	struct drm_gem_object base;
+
+	/**
+	 * Members constant at init.
+	 */
+
+	struct ttm_bo_device *bdev;
+	enum ttm_bo_type type;
+	void (*destroy) (struct ttm_buffer_object *);
+	unsigned long num_pages;
+	size_t acc_size;
+
+	/**
+	* Members not needing protection.
+	*/
+	struct kref kref;
+
+	/**
+	 * Members protected by the bo::resv::reserved lock.
+	 */
+
+	struct ttm_resource mem;
+	struct file *persistent_swap_storage;
+	struct ttm_tt *ttm;
+	bool deleted;
+
+	/**
+	 * Members protected by the bdev::lru_lock.
+	 */
+
+	struct list_head lru;
+	struct list_head ddestroy;
+	struct list_head swap;
+
+	/**
+	 * Members protected by a bo reservation.
+	 */
+
+	struct dma_fence *moving;
+	unsigned priority;
+	unsigned pin_count;
+
+	/**
+	 * Special members that are protected by the reserve lock
+	 * and the bo::lock when written to. Can be read with
+	 * either of these locks held.
+	 */
+
+	struct sg_table *sg;
+};
+
+/**
+ * struct ttm_bo_kmap_obj
+ *
+ * @virtual: The current kernel virtual address.
+ * @page: The page when kmap'ing a single page.
+ * @bo_kmap_type: Type of bo_kmap.
+ *
+ * Object describing a kernel mapping. Since a TTM bo may be located
+ * in various memory types with various caching policies, the
+ * mapping can either be an ioremap, a vmap, a kmap or part of a
+ * premapped region.
+ */
+
+#define TTM_BO_MAP_IOMEM_MASK 0x80
+struct ttm_bo_kmap_obj {
+	void *virtual;
+	struct page *page;
+	enum {
+		ttm_bo_map_iomap        = 1 | TTM_BO_MAP_IOMEM_MASK,
+		ttm_bo_map_vmap         = 2,
+		ttm_bo_map_kmap         = 3,
+		ttm_bo_map_premapped    = 4 | TTM_BO_MAP_IOMEM_MASK,
+	} bo_kmap_type;
+	struct ttm_buffer_object *bo;
+};
+
+/**
+ * struct ttm_operation_ctx
+ *
+ * @interruptible: Sleep interruptible if sleeping.
+ * @no_wait_gpu: Return immediately if the GPU is busy.
+ * @resv: Reservation object to allow reserved evictions with.
+ * @flags: Including the following flags
+ *
+ * Context for TTM operations like changing buffer placement or general memory
+ * allocation.
+ */
+struct ttm_operation_ctx {
+	bool interruptible;
+	bool no_wait_gpu;
+	struct dma_resv *resv;
+	uint64_t bytes_moved;
+	uint32_t flags;
+};
+
+/* Allow eviction of reserved BOs */
+#define TTM_OPT_FLAG_ALLOW_RES_EVICT		0x1
+/* when serving page fault or suspend, allow alloc anyway */
+#define TTM_OPT_FLAG_FORCE_ALLOC		0x2
+
+/**
+ * ttm_bo_get - reference a struct ttm_buffer_object
+ *
+ * @bo: The buffer object.
+ */
+static inline void ttm_bo_get(struct ttm_buffer_object *bo)
+{
+	kref_get(&bo->kref);
+}
+
+/**
+ * ttm_bo_get_unless_zero - reference a struct ttm_buffer_object unless
+ * its refcount has already reached zero.
+ * @bo: The buffer object.
+ *
+ * Used to reference a TTM buffer object in lookups where the object is removed
+ * from the lookup structure during the destructor and for RCU lookups.
+ *
+ * Returns: @bo if the referencing was successful, NULL otherwise.
+ */
+static inline __must_check struct ttm_buffer_object *
+ttm_bo_get_unless_zero(struct ttm_buffer_object *bo)
+{
+	if (!kref_get_unless_zero(&bo->kref))
+		return NULL;
+	return bo;
+}
+
+/**
+ * ttm_bo_wait - wait for buffer idle.
+ *
+ * @bo:  The buffer object.
+ * @interruptible:  Use interruptible wait.
+ * @no_wait:  Return immediately if buffer is busy.
+ *
+ * This function must be called with the bo::mutex held, and makes
+ * sure any previous rendering to the buffer is completed.
+ * Note: It might be necessary to block validations before the
+ * wait by reserving the buffer.
+ * Returns -EBUSY if no_wait is true and the buffer is busy.
+ * Returns -ERESTARTSYS if interrupted by a signal.
+ */
+int ttm_bo_wait(struct ttm_buffer_object *bo, bool interruptible, bool no_wait);
+
+/**
+ * ttm_bo_mem_compat - Check if proposed placement is compatible with a bo
+ *
+ * @placement:  Return immediately if buffer is busy.
+ * @mem:  The struct ttm_resource indicating the region where the bo resides
+ * @new_flags: Describes compatible placement found
+ *
+ * Returns true if the placement is compatible
+ */
+bool ttm_bo_mem_compat(struct ttm_placement *placement, struct ttm_resource *mem,
+		       uint32_t *new_flags);
+
+/**
+ * ttm_bo_validate
+ *
+ * @bo: The buffer object.
+ * @placement: Proposed placement for the buffer object.
+ * @ctx: validation parameters.
+ *
+ * Changes placement and caching policy of the buffer object
+ * according proposed placement.
+ * Returns
+ * -EINVAL on invalid proposed placement.
+ * -ENOMEM on out-of-memory condition.
+ * -EBUSY if no_wait is true and buffer busy.
+ * -ERESTARTSYS if interrupted by a signal.
+ */
+int ttm_bo_validate(struct ttm_buffer_object *bo,
+		    struct ttm_placement *placement,
+		    struct ttm_operation_ctx *ctx);
+
+/**
+ * ttm_bo_put
+ *
+ * @bo: The buffer object.
+ *
+ * Unreference a buffer object.
+ */
+void ttm_bo_put(struct ttm_buffer_object *bo);
+
+/**
+ * ttm_bo_move_to_lru_tail
+ *
+ * @bo: The buffer object.
+ * @bulk: optional bulk move structure to remember BO positions
+ *
+ * Move this BO to the tail of all lru lists used to lookup and reserve an
+ * object. This function must be called with struct ttm_bo_global::lru_lock
+ * held, and is used to make a BO less likely to be considered for eviction.
+ */
+void ttm_bo_move_to_lru_tail(struct ttm_buffer_object *bo,
+			     struct ttm_lru_bulk_move *bulk);
+
+/**
+ * ttm_bo_bulk_move_lru_tail
+ *
+ * @bulk: bulk move structure
+ *
+ * Bulk move BOs to the LRU tail, only valid to use when driver makes sure that
+ * BO order never changes. Should be called with ttm_bo_global::lru_lock held.
+ */
+void ttm_bo_bulk_move_lru_tail(struct ttm_lru_bulk_move *bulk);
+
+/**
+ * ttm_bo_lock_delayed_workqueue
+ *
+ * Prevent the delayed workqueue from running.
+ * Returns
+ * True if the workqueue was queued at the time
+ */
+int ttm_bo_lock_delayed_workqueue(struct ttm_bo_device *bdev);
+
+/**
+ * ttm_bo_unlock_delayed_workqueue
+ *
+ * Allows the delayed workqueue to run.
+ */
+void ttm_bo_unlock_delayed_workqueue(struct ttm_bo_device *bdev, int resched);
+
+/**
+ * ttm_bo_eviction_valuable
+ *
+ * @bo: The buffer object to evict
+ * @place: the placement we need to make room for
+ *
+ * Check if it is valuable to evict the BO to make room for the given placement.
+ */
+bool ttm_bo_eviction_valuable(struct ttm_buffer_object *bo,
+			      const struct ttm_place *place);
+
+size_t ttm_bo_dma_acc_size(struct ttm_bo_device *bdev,
+			   unsigned long bo_size,
+			   unsigned struct_size);
+
+/**
+ * ttm_bo_init_reserved
+ *
+ * @bdev: Pointer to a ttm_bo_device struct.
+ * @bo: Pointer to a ttm_buffer_object to be initialized.
+ * @size: Requested size of buffer object.
+ * @type: Requested type of buffer object.
+ * @flags: Initial placement flags.
+ * @page_alignment: Data alignment in pages.
+ * @ctx: TTM operation context for memory allocation.
+ * @acc_size: Accounted size for this object.
+ * @resv: Pointer to a dma_resv, or NULL to let ttm allocate one.
+ * @destroy: Destroy function. Use NULL for kfree().
+ *
+ * This function initializes a pre-allocated struct ttm_buffer_object.
+ * As this object may be part of a larger structure, this function,
+ * together with the @destroy function,
+ * enables driver-specific objects derived from a ttm_buffer_object.
+ *
+ * On successful return, the caller owns an object kref to @bo. The kref and
+ * list_kref are usually set to 1, but note that in some situations, other
+ * tasks may already be holding references to @bo as well.
+ * Furthermore, if resv == NULL, the buffer's reservation lock will be held,
+ * and it is the caller's responsibility to call ttm_bo_unreserve.
+ *
+ * If a failure occurs, the function will call the @destroy function, or
+ * kfree() if @destroy is NULL. Thus, after a failure, dereferencing @bo is
+ * illegal and will likely cause memory corruption.
+ *
+ * Returns
+ * -ENOMEM: Out of memory.
+ * -EINVAL: Invalid placement flags.
+ * -ERESTARTSYS: Interrupted by signal while sleeping waiting for resources.
+ */
+
+int ttm_bo_init_reserved(struct ttm_bo_device *bdev,
+			 struct ttm_buffer_object *bo,
+			 unsigned long size,
+			 enum ttm_bo_type type,
+			 struct ttm_placement *placement,
+			 uint32_t page_alignment,
+			 struct ttm_operation_ctx *ctx,
+			 size_t acc_size,
+			 struct sg_table *sg,
+			 struct dma_resv *resv,
+			 void (*destroy) (struct ttm_buffer_object *));
+
+/**
+ * ttm_bo_init
+ *
+ * @bdev: Pointer to a ttm_bo_device struct.
+ * @bo: Pointer to a ttm_buffer_object to be initialized.
+ * @size: Requested size of buffer object.
+ * @type: Requested type of buffer object.
+ * @flags: Initial placement flags.
+ * @page_alignment: Data alignment in pages.
+ * @interruptible: If needing to sleep to wait for GPU resources,
+ * sleep interruptible.
+ * pinned in physical memory. If this behaviour is not desired, this member
+ * holds a pointer to a persistent shmem object. Typically, this would
+ * point to the shmem object backing a GEM object if TTM is used to back a
+ * GEM user interface.
+ * @acc_size: Accounted size for this object.
+ * @resv: Pointer to a dma_resv, or NULL to let ttm allocate one.
+ * @destroy: Destroy function. Use NULL for kfree().
+ *
+ * This function initializes a pre-allocated struct ttm_buffer_object.
+ * As this object may be part of a larger structure, this function,
+ * together with the @destroy function,
+ * enables driver-specific objects derived from a ttm_buffer_object.
+ *
+ * On successful return, the caller owns an object kref to @bo. The kref and
+ * list_kref are usually set to 1, but note that in some situations, other
+ * tasks may already be holding references to @bo as well.
+ *
+ * If a failure occurs, the function will call the @destroy function, or
+ * kfree() if @destroy is NULL. Thus, after a failure, dereferencing @bo is
+ * illegal and will likely cause memory corruption.
+ *
+ * Returns
+ * -ENOMEM: Out of memory.
+ * -EINVAL: Invalid placement flags.
+ * -ERESTARTSYS: Interrupted by signal while sleeping waiting for resources.
+ */
+int ttm_bo_init(struct ttm_bo_device *bdev, struct ttm_buffer_object *bo,
+		unsigned long size, enum ttm_bo_type type,
+		struct ttm_placement *placement,
+		uint32_t page_alignment, bool interrubtible, size_t acc_size,
+		struct sg_table *sg, struct dma_resv *resv,
+		void (*destroy) (struct ttm_buffer_object *));
+
+/**
+ * ttm_bo_create
+ *
+ * @bdev: Pointer to a ttm_bo_device struct.
+ * @size: Requested size of buffer object.
+ * @type: Requested type of buffer object.
+ * @placement: Initial placement.
+ * @page_alignment: Data alignment in pages.
+ * @interruptible: If needing to sleep while waiting for GPU resources,
+ * sleep interruptible.
+ * @p_bo: On successful completion *p_bo points to the created object.
+ *
+ * This function allocates a ttm_buffer_object, and then calls ttm_bo_init
+ * on that object. The destroy function is set to kfree().
+ * Returns
+ * -ENOMEM: Out of memory.
+ * -EINVAL: Invalid placement flags.
+ * -ERESTARTSYS: Interrupted by signal while waiting for resources.
+ */
+int ttm_bo_create(struct ttm_bo_device *bdev, unsigned long size,
+		  enum ttm_bo_type type, struct ttm_placement *placement,
+		  uint32_t page_alignment, bool interruptible,
+		  struct ttm_buffer_object **p_bo);
+
+/**
+ * ttm_bo_evict_mm
+ *
+ * @bdev: Pointer to a ttm_bo_device struct.
+ * @mem_type: The memory type.
+ *
+ * Evicts all buffers on the lru list of the memory type.
+ * This is normally part of a VT switch or an
+ * out-of-memory-space-due-to-fragmentation handler.
+ * The caller must make sure that there are no other processes
+ * currently validating buffers, and can do that by taking the
+ * struct ttm_bo_device::ttm_lock in write mode.
+ *
+ * Returns:
+ * -EINVAL: Invalid or uninitialized memory type.
+ * -ERESTARTSYS: The call was interrupted by a signal while waiting to
+ * evict a buffer.
+ */
+int ttm_bo_evict_mm(struct ttm_bo_device *bdev, unsigned mem_type);
+
+/**
+ * ttm_kmap_obj_virtual
+ *
+ * @map: A struct ttm_bo_kmap_obj returned from ttm_bo_kmap.
+ * @is_iomem: Pointer to an integer that on return indicates 1 if the
+ * virtual map is io memory, 0 if normal memory.
+ *
+ * Returns the virtual address of a buffer object area mapped by ttm_bo_kmap.
+ * If *is_iomem is 1 on return, the virtual address points to an io memory area,
+ * that should strictly be accessed by the iowriteXX() and similar functions.
+ */
+static inline void *ttm_kmap_obj_virtual(struct ttm_bo_kmap_obj *map,
+					 bool *is_iomem)
+{
+	*is_iomem = !!(map->bo_kmap_type & TTM_BO_MAP_IOMEM_MASK);
+	return map->virtual;
+}
+
+/**
+ * ttm_bo_kmap
+ *
+ * @bo: The buffer object.
+ * @start_page: The first page to map.
+ * @num_pages: Number of pages to map.
+ * @map: pointer to a struct ttm_bo_kmap_obj representing the map.
+ *
+ * Sets up a kernel virtual mapping, using ioremap, vmap or kmap to the
+ * data in the buffer object. The ttm_kmap_obj_virtual function can then be
+ * used to obtain a virtual address to the data.
+ *
+ * Returns
+ * -ENOMEM: Out of memory.
+ * -EINVAL: Invalid range.
+ */
+int ttm_bo_kmap(struct ttm_buffer_object *bo, unsigned long start_page,
+		unsigned long num_pages, struct ttm_bo_kmap_obj *map);
+
+/**
+ * ttm_bo_kunmap
+ *
+ * @map: Object describing the map to unmap.
+ *
+ * Unmaps a kernel map set up by ttm_bo_kmap.
+ */
+void ttm_bo_kunmap(struct ttm_bo_kmap_obj *map);
+
+/**
+ * ttm_bo_mmap_obj - mmap memory backed by a ttm buffer object.
+ *
+ * @vma:       vma as input from the fbdev mmap method.
+ * @bo:        The bo backing the address space.
+ *
+ * Maps a buffer object.
+ */
+int ttm_bo_mmap_obj(struct vm_area_struct *vma, struct ttm_buffer_object *bo);
+
+/**
+ * ttm_bo_mmap - mmap out of the ttm device address space.
+ *
+ * @filp:      filp as input from the mmap method.
+ * @vma:       vma as input from the mmap method.
+ * @bdev:      Pointer to the ttm_bo_device with the address space manager.
+ *
+ * This function is intended to be called by the device mmap method.
+ * if the device address space is to be backed by the bo manager.
+ */
+int ttm_bo_mmap(struct file *filp, struct vm_area_struct *vma,
+		struct ttm_bo_device *bdev);
+
+/**
+ * ttm_bo_io
+ *
+ * @bdev:      Pointer to the struct ttm_bo_device.
+ * @filp:      Pointer to the struct file attempting to read / write.
+ * @wbuf:      User-space pointer to address of buffer to write. NULL on read.
+ * @rbuf:      User-space pointer to address of buffer to read into.
+ * Null on write.
+ * @count:     Number of bytes to read / write.
+ * @f_pos:     Pointer to current file position.
+ * @write:     1 for read, 0 for write.
+ *
+ * This function implements read / write into ttm buffer objects, and is
+ * intended to
+ * be called from the fops::read and fops::write method.
+ * Returns:
+ * See man (2) write, man(2) read. In particular,
+ * the function may return -ERESTARTSYS if
+ * interrupted by a signal.
+ */
+ssize_t ttm_bo_io(struct ttm_bo_device *bdev, struct file *filp,
+		  const char __user *wbuf, char __user *rbuf,
+		  size_t count, loff_t *f_pos, bool write);
+
+int ttm_bo_swapout(struct ttm_bo_global *glob,
+			struct ttm_operation_ctx *ctx);
+void ttm_bo_swapout_all(void);
+
+/**
+ * ttm_bo_uses_embedded_gem_object - check if the given bo uses the
+ * embedded drm_gem_object.
+ *
+ * Most ttm drivers are using gem too, so the embedded
+ * ttm_buffer_object.base will be initialized by the driver (before
+ * calling ttm_bo_init).  It is also possible to use ttm without gem
+ * though (vmwgfx does that).
+ *
+ * This helper will figure whenever a given ttm bo is a gem object too
+ * or not.
+ *
+ * @bo: The bo to check.
+ */
+static inline bool ttm_bo_uses_embedded_gem_object(struct ttm_buffer_object *bo)
+{
+	return bo->base.dev != NULL;
+}
+
+/**
+ * ttm_bo_pin - Pin the buffer object.
+ * @bo: The buffer object to pin
+ *
+ * Make sure the buffer is not evicted any more during memory pressure.
+ */
+static inline void ttm_bo_pin(struct ttm_buffer_object *bo)
+{
+	dma_resv_assert_held(bo->base.resv);
+	++bo->pin_count;
+}
+
+/**
+ * ttm_bo_unpin - Unpin the buffer object.
+ * @bo: The buffer object to unpin
+ *
+ * Allows the buffer object to be evicted again during memory pressure.
+ */
+static inline void ttm_bo_unpin(struct ttm_buffer_object *bo)
+{
+	dma_resv_assert_held(bo->base.resv);
+	if (bo->pin_count)
+		--bo->pin_count;
+	else
+		WARN_ON_ONCE(true);
+}
+
+int ttm_mem_evict_first(struct ttm_bo_device *bdev,
+			struct ttm_resource_manager *man,
+			const struct ttm_place *place,
+			struct ttm_operation_ctx *ctx,
+			struct ww_acquire_ctx *ticket);
+
+/* Default number of pre-faulted pages in the TTM fault handler */
+#define TTM_BO_VM_NUM_PREFAULT 16
+
+vm_fault_t ttm_bo_vm_reserve(struct ttm_buffer_object *bo,
+			     struct vm_fault *vmf);
+
+vm_fault_t ttm_bo_vm_fault_reserved(struct vm_fault *vmf,
+				    pgprot_t prot,
+				    pgoff_t num_prefault,
+				    pgoff_t fault_page_size);
+
+vm_fault_t ttm_bo_vm_fault(struct vm_fault *vmf);
+
+void ttm_bo_vm_open(struct vm_area_struct *vma);
+
+void ttm_bo_vm_close(struct vm_area_struct *vma);
+
+int ttm_bo_vm_access(struct vm_area_struct *vma, unsigned long addr,
+		     void *buf, int len, int write);
+
+#endif
diff --git a/include/drm/ttm/ttm_bo_driver.h b/include/drm/ttm/ttm_bo_driver.h
new file mode 100644
index 000000000..864afa8f6
--- /dev/null
+++ b/include/drm/ttm/ttm_bo_driver.h
@@ -0,0 +1,725 @@
+/**************************************************************************
+ *
+ * Copyright (c) 2006-2009 Vmware, Inc., Palo Alto, CA., USA
+ * All Rights Reserved.
+ *
+ * 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, sub license, 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 NON-INFRINGEMENT. IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDERS, AUTHORS 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.
+ *
+ **************************************************************************/
+/*
+ * Authors: Thomas Hellstrom <thellstrom-at-vmware-dot-com>
+ */
+#ifndef _TTM_BO_DRIVER_H_
+#define _TTM_BO_DRIVER_H_
+
+#include <drm/drm_mm.h>
+#include <drm/drm_vma_manager.h>
+#include <linux/workqueue.h>
+#include <linux/fs.h>
+#include <linux/spinlock.h>
+#include <linux/dma-resv.h>
+
+#include "ttm_bo_api.h"
+#include "ttm_memory.h"
+#include "ttm_module.h"
+#include "ttm_placement.h"
+#include "ttm_tt.h"
+
+/**
+ * struct ttm_bo_driver
+ *
+ * @create_ttm_backend_entry: Callback to create a struct ttm_backend.
+ * @evict_flags: Callback to obtain placement flags when a buffer is evicted.
+ * @move: Callback for a driver to hook in accelerated functions to
+ * move a buffer.
+ * If set to NULL, a potentially slow memcpy() move is used.
+ */
+
+struct ttm_bo_driver {
+	/**
+	 * ttm_tt_create
+	 *
+	 * @bo: The buffer object to create the ttm for.
+	 * @page_flags: Page flags as identified by TTM_PAGE_FLAG_XX flags.
+	 *
+	 * Create a struct ttm_tt to back data with system memory pages.
+	 * No pages are actually allocated.
+	 * Returns:
+	 * NULL: Out of memory.
+	 */
+	struct ttm_tt *(*ttm_tt_create)(struct ttm_buffer_object *bo,
+					uint32_t page_flags);
+
+	/**
+	 * ttm_tt_populate
+	 *
+	 * @ttm: The struct ttm_tt to contain the backing pages.
+	 *
+	 * Allocate all backing pages
+	 * Returns:
+	 * -ENOMEM: Out of memory.
+	 */
+	int (*ttm_tt_populate)(struct ttm_bo_device *bdev,
+			       struct ttm_tt *ttm,
+			       struct ttm_operation_ctx *ctx);
+
+	/**
+	 * ttm_tt_unpopulate
+	 *
+	 * @ttm: The struct ttm_tt to contain the backing pages.
+	 *
+	 * Free all backing page
+	 */
+	void (*ttm_tt_unpopulate)(struct ttm_bo_device *bdev, struct ttm_tt *ttm);
+
+	/**
+	 * ttm_tt_bind
+	 *
+	 * @bdev: Pointer to a ttm device
+	 * @ttm: Pointer to a struct ttm_tt.
+	 * @bo_mem: Pointer to a struct ttm_resource describing the
+	 * memory type and location for binding.
+	 *
+	 * Bind the backend pages into the aperture in the location
+	 * indicated by @bo_mem. This function should be able to handle
+	 * differences between aperture and system page sizes.
+	 */
+	int (*ttm_tt_bind)(struct ttm_bo_device *bdev, struct ttm_tt *ttm, struct ttm_resource *bo_mem);
+
+	/**
+	 * ttm_tt_unbind
+	 *
+	 * @bdev: Pointer to a ttm device
+	 * @ttm: Pointer to a struct ttm_tt.
+	 *
+	 * Unbind previously bound backend pages. This function should be
+	 * able to handle differences between aperture and system page sizes.
+	 */
+	void (*ttm_tt_unbind)(struct ttm_bo_device *bdev, struct ttm_tt *ttm);
+
+	/**
+	 * ttm_tt_destroy
+	 *
+	 * @bdev: Pointer to a ttm device
+	 * @ttm: Pointer to a struct ttm_tt.
+	 *
+	 * Destroy the backend. This will be call back from ttm_tt_destroy so
+	 * don't call ttm_tt_destroy from the callback or infinite loop.
+	 */
+	void (*ttm_tt_destroy)(struct ttm_bo_device *bdev, struct ttm_tt *ttm);
+
+	/**
+	 * struct ttm_bo_driver member eviction_valuable
+	 *
+	 * @bo: the buffer object to be evicted
+	 * @place: placement we need room for
+	 *
+	 * Check with the driver if it is valuable to evict a BO to make room
+	 * for a certain placement.
+	 */
+	bool (*eviction_valuable)(struct ttm_buffer_object *bo,
+				  const struct ttm_place *place);
+	/**
+	 * struct ttm_bo_driver member evict_flags:
+	 *
+	 * @bo: the buffer object to be evicted
+	 *
+	 * Return the bo flags for a buffer which is not mapped to the hardware.
+	 * These will be placed in proposed_flags so that when the move is
+	 * finished, they'll end up in bo->mem.flags
+	 */
+
+	void (*evict_flags)(struct ttm_buffer_object *bo,
+			    struct ttm_placement *placement);
+
+	/**
+	 * struct ttm_bo_driver member move:
+	 *
+	 * @bo: the buffer to move
+	 * @evict: whether this motion is evicting the buffer from
+	 * the graphics address space
+	 * @ctx: context for this move with parameters
+	 * @new_mem: the new memory region receiving the buffer
+	 *
+	 * Move a buffer between two memory regions.
+	 */
+	int (*move)(struct ttm_buffer_object *bo, bool evict,
+		    struct ttm_operation_ctx *ctx,
+		    struct ttm_resource *new_mem);
+
+	/**
+	 * struct ttm_bo_driver_member verify_access
+	 *
+	 * @bo: Pointer to a buffer object.
+	 * @filp: Pointer to a struct file trying to access the object.
+	 *
+	 * Called from the map / write / read methods to verify that the
+	 * caller is permitted to access the buffer object.
+	 * This member may be set to NULL, which will refuse this kind of
+	 * access for all buffer objects.
+	 * This function should return 0 if access is granted, -EPERM otherwise.
+	 */
+	int (*verify_access)(struct ttm_buffer_object *bo,
+			     struct file *filp);
+
+	/**
+	 * Hook to notify driver about a driver move so it
+	 * can do tiling things and book-keeping.
+	 *
+	 * @evict: whether this move is evicting the buffer from the graphics
+	 * address space
+	 */
+	void (*move_notify)(struct ttm_buffer_object *bo,
+			    bool evict,
+			    struct ttm_resource *new_mem);
+	/* notify the driver we are taking a fault on this BO
+	 * and have reserved it */
+	int (*fault_reserve_notify)(struct ttm_buffer_object *bo);
+
+	/**
+	 * notify the driver that we're about to swap out this bo
+	 */
+	void (*swap_notify)(struct ttm_buffer_object *bo);
+
+	/**
+	 * Driver callback on when mapping io memory (for bo_move_memcpy
+	 * for instance). TTM will take care to call io_mem_free whenever
+	 * the mapping is not use anymore. io_mem_reserve & io_mem_free
+	 * are balanced.
+	 */
+	int (*io_mem_reserve)(struct ttm_bo_device *bdev,
+			      struct ttm_resource *mem);
+	void (*io_mem_free)(struct ttm_bo_device *bdev,
+			    struct ttm_resource *mem);
+
+	/**
+	 * Return the pfn for a given page_offset inside the BO.
+	 *
+	 * @bo: the BO to look up the pfn for
+	 * @page_offset: the offset to look up
+	 */
+	unsigned long (*io_mem_pfn)(struct ttm_buffer_object *bo,
+				    unsigned long page_offset);
+
+	/**
+	 * Read/write memory buffers for ptrace access
+	 *
+	 * @bo: the BO to access
+	 * @offset: the offset from the start of the BO
+	 * @buf: pointer to source/destination buffer
+	 * @len: number of bytes to copy
+	 * @write: whether to read (0) from or write (non-0) to BO
+	 *
+	 * If successful, this function should return the number of
+	 * bytes copied, -EIO otherwise. If the number of bytes
+	 * returned is < len, the function may be called again with
+	 * the remainder of the buffer to copy.
+	 */
+	int (*access_memory)(struct ttm_buffer_object *bo, unsigned long offset,
+			     void *buf, int len, int write);
+
+	/**
+	 * struct ttm_bo_driver member del_from_lru_notify
+	 *
+	 * @bo: the buffer object deleted from lru
+	 *
+	 * notify driver that a BO was deleted from LRU.
+	 */
+	void (*del_from_lru_notify)(struct ttm_buffer_object *bo);
+
+	/**
+	 * Notify the driver that we're about to release a BO
+	 *
+	 * @bo: BO that is about to be released
+	 *
+	 * Gives the driver a chance to do any cleanup, including
+	 * adding fences that may force a delayed delete
+	 */
+	void (*release_notify)(struct ttm_buffer_object *bo);
+};
+
+/**
+ * struct ttm_bo_global - Buffer object driver global data.
+ *
+ * @dummy_read_page: Pointer to a dummy page used for mapping requests
+ * of unpopulated pages.
+ * @shrink: A shrink callback object used for buffer object swap.
+ * @device_list_mutex: Mutex protecting the device list.
+ * This mutex is held while traversing the device list for pm options.
+ * @lru_lock: Spinlock protecting the bo subsystem lru lists.
+ * @device_list: List of buffer object devices.
+ * @swap_lru: Lru list of buffer objects used for swapping.
+ */
+
+extern struct ttm_bo_global {
+
+	/**
+	 * Constant after init.
+	 */
+
+	struct kobject kobj;
+	struct page *dummy_read_page;
+	spinlock_t lru_lock;
+
+	/**
+	 * Protected by ttm_global_mutex.
+	 */
+	struct list_head device_list;
+
+	/**
+	 * Protected by the lru_lock.
+	 */
+	struct list_head swap_lru[TTM_MAX_BO_PRIORITY];
+
+	/**
+	 * Internal protection.
+	 */
+	atomic_t bo_count;
+} ttm_bo_glob;
+
+
+#define TTM_NUM_MEM_TYPES 8
+
+/**
+ * struct ttm_bo_device - Buffer object driver device-specific data.
+ *
+ * @driver: Pointer to a struct ttm_bo_driver struct setup by the driver.
+ * @man: An array of resource_managers.
+ * @vma_manager: Address space manager (pointer)
+ * lru_lock: Spinlock that protects the buffer+device lru lists and
+ * ddestroy lists.
+ * @dev_mapping: A pointer to the struct address_space representing the
+ * device address space.
+ * @wq: Work queue structure for the delayed delete workqueue.
+ * @no_retry: Don't retry allocation if it fails
+ *
+ */
+
+struct ttm_bo_device {
+
+	/*
+	 * Constant after bo device init / atomic.
+	 */
+	struct list_head device_list;
+	struct ttm_bo_driver *driver;
+	/*
+	 * access via ttm_manager_type.
+	 */
+	struct ttm_resource_manager sysman;
+	struct ttm_resource_manager *man_drv[TTM_NUM_MEM_TYPES];
+	/*
+	 * Protected by internal locks.
+	 */
+	struct drm_vma_offset_manager *vma_manager;
+
+	/*
+	 * Protected by the global:lru lock.
+	 */
+	struct list_head ddestroy;
+
+	/*
+	 * Protected by load / firstopen / lastclose /unload sync.
+	 */
+
+	struct address_space *dev_mapping;
+
+	/*
+	 * Internal protection.
+	 */
+
+	struct delayed_work wq;
+
+	bool need_dma32;
+
+	bool no_retry;
+};
+
+static inline struct ttm_resource_manager *ttm_manager_type(struct ttm_bo_device *bdev,
+							    int mem_type)
+{
+	return bdev->man_drv[mem_type];
+}
+
+static inline void ttm_set_driver_manager(struct ttm_bo_device *bdev,
+					  int type,
+					  struct ttm_resource_manager *manager)
+{
+	bdev->man_drv[type] = manager;
+}
+
+/**
+ * struct ttm_lru_bulk_move_pos
+ *
+ * @first: first BO in the bulk move range
+ * @last: last BO in the bulk move range
+ *
+ * Positions for a lru bulk move.
+ */
+struct ttm_lru_bulk_move_pos {
+	struct ttm_buffer_object *first;
+	struct ttm_buffer_object *last;
+};
+
+/**
+ * struct ttm_lru_bulk_move
+ *
+ * @tt: first/last lru entry for BOs in the TT domain
+ * @vram: first/last lru entry for BOs in the VRAM domain
+ * @swap: first/last lru entry for BOs on the swap list
+ *
+ * Helper structure for bulk moves on the LRU list.
+ */
+struct ttm_lru_bulk_move {
+	struct ttm_lru_bulk_move_pos tt[TTM_MAX_BO_PRIORITY];
+	struct ttm_lru_bulk_move_pos vram[TTM_MAX_BO_PRIORITY];
+	struct ttm_lru_bulk_move_pos swap[TTM_MAX_BO_PRIORITY];
+};
+
+/*
+ * ttm_bo.c
+ */
+
+/**
+ * ttm_bo_mem_space
+ *
+ * @bo: Pointer to a struct ttm_buffer_object. the data of which
+ * we want to allocate space for.
+ * @proposed_placement: Proposed new placement for the buffer object.
+ * @mem: A struct ttm_resource.
+ * @interruptible: Sleep interruptible when sliping.
+ * @no_wait_gpu: Return immediately if the GPU is busy.
+ *
+ * Allocate memory space for the buffer object pointed to by @bo, using
+ * the placement flags in @mem, potentially evicting other idle buffer objects.
+ * This function may sleep while waiting for space to become available.
+ * Returns:
+ * -EBUSY: No space available (only if no_wait == 1).
+ * -ENOMEM: Could not allocate memory for the buffer object, either due to
+ * fragmentation or concurrent allocators.
+ * -ERESTARTSYS: An interruptible sleep was interrupted by a signal.
+ */
+int ttm_bo_mem_space(struct ttm_buffer_object *bo,
+		     struct ttm_placement *placement,
+		     struct ttm_resource *mem,
+		     struct ttm_operation_ctx *ctx);
+
+int ttm_bo_device_release(struct ttm_bo_device *bdev);
+
+/**
+ * ttm_bo_device_init
+ *
+ * @bdev: A pointer to a struct ttm_bo_device to initialize.
+ * @glob: A pointer to an initialized struct ttm_bo_global.
+ * @driver: A pointer to a struct ttm_bo_driver set up by the caller.
+ * @mapping: The address space to use for this bo.
+ * @vma_manager: A pointer to a vma manager.
+ * @file_page_offset: Offset into the device address space that is available
+ * for buffer data. This ensures compatibility with other users of the
+ * address space.
+ *
+ * Initializes a struct ttm_bo_device:
+ * Returns:
+ * !0: Failure.
+ */
+int ttm_bo_device_init(struct ttm_bo_device *bdev,
+		       struct ttm_bo_driver *driver,
+		       struct address_space *mapping,
+		       struct drm_vma_offset_manager *vma_manager,
+		       bool need_dma32);
+
+/**
+ * ttm_bo_unmap_virtual
+ *
+ * @bo: tear down the virtual mappings for this BO
+ */
+void ttm_bo_unmap_virtual(struct ttm_buffer_object *bo);
+
+/**
+ * ttm_bo_unmap_virtual
+ *
+ * @bo: tear down the virtual mappings for this BO
+ *
+ * The caller must take ttm_mem_io_lock before calling this function.
+ */
+void ttm_bo_unmap_virtual_locked(struct ttm_buffer_object *bo);
+
+/**
+ * ttm_bo_reserve:
+ *
+ * @bo: A pointer to a struct ttm_buffer_object.
+ * @interruptible: Sleep interruptible if waiting.
+ * @no_wait: Don't sleep while trying to reserve, rather return -EBUSY.
+ * @ticket: ticket used to acquire the ww_mutex.
+ *
+ * Locks a buffer object for validation. (Or prevents other processes from
+ * locking it for validation), while taking a number of measures to prevent
+ * deadlocks.
+ *
+ * Returns:
+ * -EDEADLK: The reservation may cause a deadlock.
+ * Release all buffer reservations, wait for @bo to become unreserved and
+ * try again.
+ * -ERESTARTSYS: A wait for the buffer to become unreserved was interrupted by
+ * a signal. Release all buffer reservations and return to user-space.
+ * -EBUSY: The function needed to sleep, but @no_wait was true
+ * -EALREADY: Bo already reserved using @ticket. This error code will only
+ * be returned if @use_ticket is set to true.
+ */
+static inline int ttm_bo_reserve(struct ttm_buffer_object *bo,
+				 bool interruptible, bool no_wait,
+				 struct ww_acquire_ctx *ticket)
+{
+	int ret = 0;
+
+	if (no_wait) {
+		bool success;
+		if (WARN_ON(ticket))
+			return -EBUSY;
+
+		success = dma_resv_trylock(bo->base.resv);
+		return success ? 0 : -EBUSY;
+	}
+
+	if (interruptible)
+		ret = dma_resv_lock_interruptible(bo->base.resv, ticket);
+	else
+		ret = dma_resv_lock(bo->base.resv, ticket);
+	if (ret == -EINTR)
+		return -ERESTARTSYS;
+	return ret;
+}
+
+/**
+ * ttm_bo_reserve_slowpath:
+ * @bo: A pointer to a struct ttm_buffer_object.
+ * @interruptible: Sleep interruptible if waiting.
+ * @sequence: Set (@bo)->sequence to this value after lock
+ *
+ * This is called after ttm_bo_reserve returns -EAGAIN and we backed off
+ * from all our other reservations. Because there are no other reservations
+ * held by us, this function cannot deadlock any more.
+ */
+static inline int ttm_bo_reserve_slowpath(struct ttm_buffer_object *bo,
+					  bool interruptible,
+					  struct ww_acquire_ctx *ticket)
+{
+	if (interruptible) {
+		int ret = dma_resv_lock_slow_interruptible(bo->base.resv,
+							   ticket);
+		if (ret == -EINTR)
+			ret = -ERESTARTSYS;
+		return ret;
+	}
+	dma_resv_lock_slow(bo->base.resv, ticket);
+	return 0;
+}
+
+static inline void ttm_bo_move_to_lru_tail_unlocked(struct ttm_buffer_object *bo)
+{
+	spin_lock(&ttm_bo_glob.lru_lock);
+	ttm_bo_move_to_lru_tail(bo, NULL);
+	spin_unlock(&ttm_bo_glob.lru_lock);
+}
+
+static inline void ttm_bo_assign_mem(struct ttm_buffer_object *bo,
+				     struct ttm_resource *new_mem)
+{
+	bo->mem = *new_mem;
+	new_mem->mm_node = NULL;
+}
+
+/**
+ * ttm_bo_move_null = assign memory for a buffer object.
+ * @bo: The bo to assign the memory to
+ * @new_mem: The memory to be assigned.
+ *
+ * Assign the memory from new_mem to the memory of the buffer object bo.
+ */
+static inline void ttm_bo_move_null(struct ttm_buffer_object *bo,
+				    struct ttm_resource *new_mem)
+{
+	struct ttm_resource *old_mem = &bo->mem;
+
+	WARN_ON(old_mem->mm_node != NULL);
+	ttm_bo_assign_mem(bo, new_mem);
+}
+
+/**
+ * ttm_bo_unreserve
+ *
+ * @bo: A pointer to a struct ttm_buffer_object.
+ *
+ * Unreserve a previous reservation of @bo.
+ */
+static inline void ttm_bo_unreserve(struct ttm_buffer_object *bo)
+{
+	ttm_bo_move_to_lru_tail_unlocked(bo);
+	dma_resv_unlock(bo->base.resv);
+}
+
+/*
+ * ttm_bo_util.c
+ */
+
+int ttm_mem_io_reserve(struct ttm_bo_device *bdev,
+		       struct ttm_resource *mem);
+void ttm_mem_io_free(struct ttm_bo_device *bdev,
+		     struct ttm_resource *mem);
+/**
+ * ttm_bo_move_ttm
+ *
+ * @bo: A pointer to a struct ttm_buffer_object.
+ * @interruptible: Sleep interruptible if waiting.
+ * @no_wait_gpu: Return immediately if the GPU is busy.
+ * @new_mem: struct ttm_resource indicating where to move.
+ *
+ * Optimized move function for a buffer object with both old and
+ * new placement backed by a TTM. The function will, if successful,
+ * free any old aperture space, and set (@new_mem)->mm_node to NULL,
+ * and update the (@bo)->mem placement flags. If unsuccessful, the old
+ * data remains untouched, and it's up to the caller to free the
+ * memory space indicated by @new_mem.
+ * Returns:
+ * !0: Failure.
+ */
+
+int ttm_bo_move_ttm(struct ttm_buffer_object *bo,
+		    struct ttm_operation_ctx *ctx,
+		    struct ttm_resource *new_mem);
+
+/**
+ * ttm_bo_move_memcpy
+ *
+ * @bo: A pointer to a struct ttm_buffer_object.
+ * @interruptible: Sleep interruptible if waiting.
+ * @no_wait_gpu: Return immediately if the GPU is busy.
+ * @new_mem: struct ttm_resource indicating where to move.
+ *
+ * Fallback move function for a mappable buffer object in mappable memory.
+ * The function will, if successful,
+ * free any old aperture space, and set (@new_mem)->mm_node to NULL,
+ * and update the (@bo)->mem placement flags. If unsuccessful, the old
+ * data remains untouched, and it's up to the caller to free the
+ * memory space indicated by @new_mem.
+ * Returns:
+ * !0: Failure.
+ */
+
+int ttm_bo_move_memcpy(struct ttm_buffer_object *bo,
+		       struct ttm_operation_ctx *ctx,
+		       struct ttm_resource *new_mem);
+
+/**
+ * ttm_bo_free_old_node
+ *
+ * @bo: A pointer to a struct ttm_buffer_object.
+ *
+ * Utility function to free an old placement after a successful move.
+ */
+void ttm_bo_free_old_node(struct ttm_buffer_object *bo);
+
+/**
+ * ttm_bo_move_accel_cleanup.
+ *
+ * @bo: A pointer to a struct ttm_buffer_object.
+ * @fence: A fence object that signals when moving is complete.
+ * @evict: This is an evict move. Don't return until the buffer is idle.
+ * @pipeline: evictions are to be pipelined.
+ * @new_mem: struct ttm_resource indicating where to move.
+ *
+ * Accelerated move function to be called when an accelerated move
+ * has been scheduled. The function will create a new temporary buffer object
+ * representing the old placement, and put the sync object on both buffer
+ * objects. After that the newly created buffer object is unref'd to be
+ * destroyed when the move is complete. This will help pipeline
+ * buffer moves.
+ */
+int ttm_bo_move_accel_cleanup(struct ttm_buffer_object *bo,
+			      struct dma_fence *fence, bool evict,
+			      bool pipeline,
+			      struct ttm_resource *new_mem);
+
+/**
+ * ttm_bo_pipeline_gutting.
+ *
+ * @bo: A pointer to a struct ttm_buffer_object.
+ *
+ * Pipelined gutting a BO of its backing store.
+ */
+int ttm_bo_pipeline_gutting(struct ttm_buffer_object *bo);
+
+/**
+ * ttm_io_prot
+ *
+ * @c_state: Caching state.
+ * @tmp: Page protection flag for a normal, cached mapping.
+ *
+ * Utility function that returns the pgprot_t that should be used for
+ * setting up a PTE with the caching model indicated by @c_state.
+ */
+pgprot_t ttm_io_prot(uint32_t caching_flags, pgprot_t tmp);
+
+/**
+ * ttm_bo_tt_bind
+ *
+ * Bind the object tt to a memory resource.
+ */
+int ttm_bo_tt_bind(struct ttm_buffer_object *bo, struct ttm_resource *mem);
+
+/**
+ * ttm_bo_tt_bind
+ *
+ * Unbind the object tt from a memory resource.
+ */
+void ttm_bo_tt_unbind(struct ttm_buffer_object *bo);
+
+/**
+ * ttm_bo_tt_destroy.
+ */
+void ttm_bo_tt_destroy(struct ttm_buffer_object *bo);
+
+/**
+ * ttm_range_man_init
+ *
+ * @bdev: ttm device
+ * @type: memory manager type
+ * @use_tt: if the memory manager uses tt
+ * @p_size: size of area to be managed in pages.
+ *
+ * Initialise a generic range manager for the selected memory type.
+ * The range manager is installed for this device in the type slot.
+ */
+int ttm_range_man_init(struct ttm_bo_device *bdev,
+		       unsigned type, bool use_tt,
+		       unsigned long p_size);
+
+/**
+ * ttm_range_man_fini
+ *
+ * @bdev: ttm device
+ * @type: memory manager type
+ *
+ * Remove the generic range manager from a slot and tear it down.
+ */
+int ttm_range_man_fini(struct ttm_bo_device *bdev,
+		       unsigned type);
+
+#endif
diff --git a/include/drm/ttm/ttm_execbuf_util.h b/include/drm/ttm/ttm_execbuf_util.h
new file mode 100644
index 000000000..a99d7fdf2
--- /dev/null
+++ b/include/drm/ttm/ttm_execbuf_util.h
@@ -0,0 +1,118 @@
+/**************************************************************************
+ *
+ * Copyright (c) 2006-2009 VMware, Inc., Palo Alto, CA., USA
+ * All Rights Reserved.
+ *
+ * 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, sub license, 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 NON-INFRINGEMENT. IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDERS, AUTHORS 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.
+ *
+ **************************************************************************/
+/*
+ * Authors: Thomas Hellstrom <thellstrom-at-vmware-dot-com>
+ */
+
+#ifndef _TTM_EXECBUF_UTIL_H_
+#define _TTM_EXECBUF_UTIL_H_
+
+#include <linux/list.h>
+
+#include "ttm_bo_api.h"
+
+/**
+ * struct ttm_validate_buffer
+ *
+ * @head:           list head for thread-private list.
+ * @bo:             refcounted buffer object pointer.
+ * @num_shared:     How many shared fences we want to add.
+ */
+
+struct ttm_validate_buffer {
+	struct list_head head;
+	struct ttm_buffer_object *bo;
+	unsigned int num_shared;
+};
+
+/**
+ * function ttm_eu_backoff_reservation
+ *
+ * @ticket:   ww_acquire_ctx from reserve call
+ * @list:     thread private list of ttm_validate_buffer structs.
+ *
+ * Undoes all buffer validation reservations for bos pointed to by
+ * the list entries.
+ */
+void ttm_eu_backoff_reservation(struct ww_acquire_ctx *ticket,
+				struct list_head *list);
+
+/**
+ * function ttm_eu_reserve_buffers
+ *
+ * @ticket:  [out] ww_acquire_ctx filled in by call, or NULL if only
+ *           non-blocking reserves should be tried.
+ * @list:    thread private list of ttm_validate_buffer structs.
+ * @intr:    should the wait be interruptible
+ * @dups:    [out] optional list of duplicates.
+ * @del_lru: true if BOs should be removed from the LRU.
+ *
+ * Tries to reserve bos pointed to by the list entries for validation.
+ * If the function returns 0, all buffers are marked as "unfenced",
+ * taken off the lru lists and are not synced for write CPU usage.
+ *
+ * If the function detects a deadlock due to multiple threads trying to
+ * reserve the same buffers in reverse order, all threads except one will
+ * back off and retry. This function may sleep while waiting for
+ * CPU write reservations to be cleared, and for other threads to
+ * unreserve their buffers.
+ *
+ * If intr is set to true, this function may return -ERESTARTSYS if the
+ * calling process receives a signal while waiting. In that case, no
+ * buffers on the list will be reserved upon return.
+ *
+ * If dups is non NULL all buffers already reserved by the current thread
+ * (e.g. duplicates) are added to this list, otherwise -EALREADY is returned
+ * on the first already reserved buffer and all buffers from the list are
+ * unreserved again.
+ *
+ * Buffers reserved by this function should be unreserved by
+ * a call to either ttm_eu_backoff_reservation() or
+ * ttm_eu_fence_buffer_objects() when command submission is complete or
+ * has failed.
+ */
+int ttm_eu_reserve_buffers(struct ww_acquire_ctx *ticket,
+			   struct list_head *list, bool intr,
+			   struct list_head *dups);
+
+/**
+ * function ttm_eu_fence_buffer_objects.
+ *
+ * @ticket:      ww_acquire_ctx from reserve call
+ * @list:        thread private list of ttm_validate_buffer structs.
+ * @fence:       The new exclusive fence for the buffers.
+ *
+ * This function should be called when command submission is complete, and
+ * it will add a new sync object to bos pointed to by entries on @list.
+ * It also unreserves all buffers, putting them on lru lists.
+ *
+ */
+void ttm_eu_fence_buffer_objects(struct ww_acquire_ctx *ticket,
+				 struct list_head *list,
+				 struct dma_fence *fence);
+
+#endif
diff --git a/include/drm/ttm/ttm_memory.h b/include/drm/ttm/ttm_memory.h
new file mode 100644
index 000000000..c1f167881
--- /dev/null
+++ b/include/drm/ttm/ttm_memory.h
@@ -0,0 +1,95 @@
+/**************************************************************************
+ *
+ * Copyright (c) 2006-2009 VMware, Inc., Palo Alto, CA., USA
+ * All Rights Reserved.
+ *
+ * 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, sub license, 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 NON-INFRINGEMENT. IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDERS, AUTHORS 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.
+ *
+ **************************************************************************/
+
+#ifndef TTM_MEMORY_H
+#define TTM_MEMORY_H
+
+#include <linux/workqueue.h>
+#include <linux/spinlock.h>
+#include <linux/bug.h>
+#include <linux/wait.h>
+#include <linux/errno.h>
+#include <linux/kobject.h>
+#include <linux/mm.h>
+#include "ttm_bo_api.h"
+
+/**
+ * struct ttm_mem_global - Global memory accounting structure.
+ *
+ * @shrink: A single callback to shrink TTM memory usage. Extend this
+ * to a linked list to be able to handle multiple callbacks when needed.
+ * @swap_queue: A workqueue to handle shrinking in low memory situations. We
+ * need a separate workqueue since it will spend a lot of time waiting
+ * for the GPU, and this will otherwise block other workqueue tasks(?)
+ * At this point we use only a single-threaded workqueue.
+ * @work: The workqueue callback for the shrink queue.
+ * @lock: Lock to protect the @shrink - and the memory accounting members,
+ * that is, essentially the whole structure with some exceptions.
+ * @lower_mem_limit: include lower limit of swap space and lower limit of
+ * system memory.
+ * @zones: Array of pointers to accounting zones.
+ * @num_zones: Number of populated entries in the @zones array.
+ * @zone_kernel: Pointer to the kernel zone.
+ * @zone_highmem: Pointer to the highmem zone if there is one.
+ * @zone_dma32: Pointer to the dma32 zone if there is one.
+ *
+ * Note that this structure is not per device. It should be global for all
+ * graphics devices.
+ */
+
+#define TTM_MEM_MAX_ZONES 2
+struct ttm_mem_zone;
+extern struct ttm_mem_global {
+	struct kobject kobj;
+	struct workqueue_struct *swap_queue;
+	struct work_struct work;
+	spinlock_t lock;
+	uint64_t lower_mem_limit;
+	struct ttm_mem_zone *zones[TTM_MEM_MAX_ZONES];
+	unsigned int num_zones;
+	struct ttm_mem_zone *zone_kernel;
+#ifdef CONFIG_HIGHMEM
+	struct ttm_mem_zone *zone_highmem;
+#else
+	struct ttm_mem_zone *zone_dma32;
+#endif
+} ttm_mem_glob;
+
+int ttm_mem_global_init(struct ttm_mem_global *glob);
+void ttm_mem_global_release(struct ttm_mem_global *glob);
+int ttm_mem_global_alloc(struct ttm_mem_global *glob, uint64_t memory,
+			 struct ttm_operation_ctx *ctx);
+void ttm_mem_global_free(struct ttm_mem_global *glob, uint64_t amount);
+int ttm_mem_global_alloc_page(struct ttm_mem_global *glob,
+			      struct page *page, uint64_t size,
+			      struct ttm_operation_ctx *ctx);
+void ttm_mem_global_free_page(struct ttm_mem_global *glob,
+			      struct page *page, uint64_t size);
+size_t ttm_round_pot(size_t size);
+bool ttm_check_under_lowerlimit(struct ttm_mem_global *glob, uint64_t num_pages,
+				struct ttm_operation_ctx *ctx);
+#endif
diff --git a/include/drm/ttm/ttm_module.h b/include/drm/ttm/ttm_module.h
new file mode 100644
index 000000000..45fa318c1
--- /dev/null
+++ b/include/drm/ttm/ttm_module.h
@@ -0,0 +1,40 @@
+/**************************************************************************
+ *
+ * Copyright 2008-2009 VMware, Inc., Palo Alto, CA., USA
+ * All Rights Reserved.
+ *
+ * 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, sub license, 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 NON-INFRINGEMENT. IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDERS, AUTHORS 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.
+ *
+ **************************************************************************/
+/*
+ * Authors: Thomas Hellstrom <thellstrom-at-vmware-dot-com>
+ */
+
+#ifndef _TTM_MODULE_H_
+#define _TTM_MODULE_H_
+
+#include <linux/kernel.h>
+struct kobject;
+
+#define TTM_PFX "[TTM] "
+extern struct kobject *ttm_get_kobj(void);
+
+#endif /* _TTM_MODULE_H_ */
diff --git a/include/drm/ttm/ttm_page_alloc.h b/include/drm/ttm/ttm_page_alloc.h
new file mode 100644
index 000000000..a6b6ef5f9
--- /dev/null
+++ b/include/drm/ttm/ttm_page_alloc.h
@@ -0,0 +1,122 @@
+/*
+ * Copyright (c) Red Hat Inc.
+
+ * 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, sub license,
+ * 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 NON-INFRINGEMENT. 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: Dave Airlie <airlied@redhat.com>
+ *          Jerome Glisse <jglisse@redhat.com>
+ */
+#ifndef TTM_PAGE_ALLOC
+#define TTM_PAGE_ALLOC
+
+#include <drm/ttm/ttm_bo_driver.h>
+#include <drm/ttm/ttm_memory.h>
+
+struct device;
+
+/**
+ * Initialize pool allocator.
+ */
+int ttm_page_alloc_init(struct ttm_mem_global *glob, unsigned max_pages);
+/**
+ * Free pool allocator.
+ */
+void ttm_page_alloc_fini(void);
+
+/**
+ * ttm_pool_populate:
+ *
+ * @ttm: The struct ttm_tt to contain the backing pages.
+ *
+ * Add backing pages to all of @ttm
+ */
+int ttm_pool_populate(struct ttm_tt *ttm, struct ttm_operation_ctx *ctx);
+
+/**
+ * ttm_pool_unpopulate:
+ *
+ * @ttm: The struct ttm_tt which to free backing pages.
+ *
+ * Free all pages of @ttm
+ */
+void ttm_pool_unpopulate(struct ttm_tt *ttm);
+
+/**
+ * Populates and DMA maps pages to fullfil a ttm_dma_populate() request
+ */
+int ttm_populate_and_map_pages(struct device *dev, struct ttm_dma_tt *tt,
+				struct ttm_operation_ctx *ctx);
+
+/**
+ * Unpopulates and DMA unmaps pages as part of a
+ * ttm_dma_unpopulate() request */
+void ttm_unmap_and_unpopulate_pages(struct device *dev, struct ttm_dma_tt *tt);
+
+/**
+ * Output the state of pools to debugfs file
+ */
+int ttm_page_alloc_debugfs(struct seq_file *m, void *data);
+
+#if defined(CONFIG_DRM_TTM_DMA_PAGE_POOL)
+/**
+ * Initialize pool allocator.
+ */
+int ttm_dma_page_alloc_init(struct ttm_mem_global *glob, unsigned max_pages);
+
+/**
+ * Free pool allocator.
+ */
+void ttm_dma_page_alloc_fini(void);
+
+/**
+ * Output the state of pools to debugfs file
+ */
+int ttm_dma_page_alloc_debugfs(struct seq_file *m, void *data);
+
+int ttm_dma_populate(struct ttm_dma_tt *ttm_dma, struct device *dev,
+			struct ttm_operation_ctx *ctx);
+void ttm_dma_unpopulate(struct ttm_dma_tt *ttm_dma, struct device *dev);
+
+#else
+static inline int ttm_dma_page_alloc_init(struct ttm_mem_global *glob,
+					  unsigned max_pages)
+{
+	return -ENODEV;
+}
+
+static inline void ttm_dma_page_alloc_fini(void) { return; }
+
+static inline int ttm_dma_page_alloc_debugfs(struct seq_file *m, void *data)
+{
+	return 0;
+}
+static inline int ttm_dma_populate(struct ttm_dma_tt *ttm_dma,
+				struct device *dev,
+				struct ttm_operation_ctx *ctx)
+{
+	return -ENOMEM;
+}
+static inline void ttm_dma_unpopulate(struct ttm_dma_tt *ttm_dma,
+				      struct device *dev)
+{
+}
+#endif
+
+#endif
diff --git a/include/drm/ttm/ttm_placement.h b/include/drm/ttm/ttm_placement.h
new file mode 100644
index 000000000..d4022655e
--- /dev/null
+++ b/include/drm/ttm/ttm_placement.h
@@ -0,0 +1,101 @@
+/**************************************************************************
+ *
+ * Copyright (c) 2006-2009 VMware, Inc., Palo Alto, CA., USA
+ * All Rights Reserved.
+ *
+ * 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, sub license, 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 NON-INFRINGEMENT. IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDERS, AUTHORS 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.
+ *
+ **************************************************************************/
+/*
+ * Authors: Thomas Hellstrom <thellstrom-at-vmware-dot-com>
+ */
+
+#ifndef _TTM_PLACEMENT_H_
+#define _TTM_PLACEMENT_H_
+
+#include <linux/types.h>
+
+/*
+ * Memory regions for data placement.
+ */
+
+#define TTM_PL_SYSTEM           0
+#define TTM_PL_TT               1
+#define TTM_PL_VRAM             2
+#define TTM_PL_PRIV             3
+
+/*
+ * Other flags that affects data placement.
+ * TTM_PL_FLAG_CACHED indicates cache-coherent mappings
+ * if available.
+ * TTM_PL_FLAG_SHARED means that another application may
+ * reference the buffer.
+ * TTM_PL_FLAG_NO_EVICT means that the buffer may never
+ * be evicted to make room for other buffers.
+ * TTM_PL_FLAG_TOPDOWN requests to be placed from the
+ * top of the memory area, instead of the bottom.
+ */
+
+#define TTM_PL_FLAG_CACHED      (1 << 16)
+#define TTM_PL_FLAG_UNCACHED    (1 << 17)
+#define TTM_PL_FLAG_WC          (1 << 18)
+#define TTM_PL_FLAG_CONTIGUOUS  (1 << 19)
+#define TTM_PL_FLAG_NO_EVICT    (1 << 21)
+#define TTM_PL_FLAG_TOPDOWN     (1 << 22)
+
+#define TTM_PL_MASK_CACHING     (TTM_PL_FLAG_CACHED | \
+				 TTM_PL_FLAG_UNCACHED | \
+				 TTM_PL_FLAG_WC)
+
+/**
+ * struct ttm_place
+ *
+ * @fpfn:	first valid page frame number to put the object
+ * @lpfn:	last valid page frame number to put the object
+ * @flags:	memory domain and caching flags for the object
+ *
+ * Structure indicating a possible place to put an object.
+ */
+struct ttm_place {
+	unsigned	fpfn;
+	unsigned	lpfn;
+	uint32_t	mem_type;
+	uint32_t	flags;
+};
+
+/**
+ * struct ttm_placement
+ *
+ * @num_placement:	number of preferred placements
+ * @placement:		preferred placements
+ * @num_busy_placement:	number of preferred placements when need to evict buffer
+ * @busy_placement:	preferred placements when need to evict buffer
+ *
+ * Structure indicating the placement you request for an object.
+ */
+struct ttm_placement {
+	unsigned		num_placement;
+	const struct ttm_place	*placement;
+	unsigned		num_busy_placement;
+	const struct ttm_place	*busy_placement;
+};
+
+#endif
diff --git a/include/drm/ttm/ttm_resource.h b/include/drm/ttm/ttm_resource.h
new file mode 100644
index 000000000..0e172d94a
--- /dev/null
+++ b/include/drm/ttm/ttm_resource.h
@@ -0,0 +1,237 @@
+/*
+ * Copyright 2020 Advanced Micro Devices, Inc.
+ *
+ * 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 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 COPYRIGHT HOLDER(S) OR AUTHOR(S) 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: Christian König
+ */
+
+#ifndef _TTM_RESOURCE_H_
+#define _TTM_RESOURCE_H_
+
+#include <linux/types.h>
+#include <linux/mutex.h>
+#include <linux/dma-fence.h>
+#include <drm/drm_print.h>
+
+#define TTM_MAX_BO_PRIORITY	4U
+
+struct ttm_bo_device;
+struct ttm_resource_manager;
+struct ttm_resource;
+struct ttm_place;
+struct ttm_buffer_object;
+
+struct ttm_resource_manager_func {
+	/**
+	 * struct ttm_resource_manager_func member alloc
+	 *
+	 * @man: Pointer to a memory type manager.
+	 * @bo: Pointer to the buffer object we're allocating space for.
+	 * @placement: Placement details.
+	 * @flags: Additional placement flags.
+	 * @mem: Pointer to a struct ttm_resource to be filled in.
+	 *
+	 * This function should allocate space in the memory type managed
+	 * by @man. Placement details if
+	 * applicable are given by @placement. If successful,
+	 * @mem::mm_node should be set to a non-null value, and
+	 * @mem::start should be set to a value identifying the beginning
+	 * of the range allocated, and the function should return zero.
+	 * If the memory region accommodate the buffer object, @mem::mm_node
+	 * should be set to NULL, and the function should return 0.
+	 * If a system error occurred, preventing the request to be fulfilled,
+	 * the function should return a negative error code.
+	 *
+	 * Note that @mem::mm_node will only be dereferenced by
+	 * struct ttm_resource_manager functions and optionally by the driver,
+	 * which has knowledge of the underlying type.
+	 *
+	 * This function may not be called from within atomic context, so
+	 * an implementation can and must use either a mutex or a spinlock to
+	 * protect any data structures managing the space.
+	 */
+	int  (*alloc)(struct ttm_resource_manager *man,
+		      struct ttm_buffer_object *bo,
+		      const struct ttm_place *place,
+		      struct ttm_resource *mem);
+
+	/**
+	 * struct ttm_resource_manager_func member free
+	 *
+	 * @man: Pointer to a memory type manager.
+	 * @mem: Pointer to a struct ttm_resource to be filled in.
+	 *
+	 * This function frees memory type resources previously allocated
+	 * and that are identified by @mem::mm_node and @mem::start. May not
+	 * be called from within atomic context.
+	 */
+	void (*free)(struct ttm_resource_manager *man,
+		     struct ttm_resource *mem);
+
+	/**
+	 * struct ttm_resource_manager_func member debug
+	 *
+	 * @man: Pointer to a memory type manager.
+	 * @printer: Prefix to be used in printout to identify the caller.
+	 *
+	 * This function is called to print out the state of the memory
+	 * type manager to aid debugging of out-of-memory conditions.
+	 * It may not be called from within atomic context.
+	 */
+	void (*debug)(struct ttm_resource_manager *man,
+		      struct drm_printer *printer);
+};
+
+/**
+ * struct ttm_resource_manager
+ *
+ * @use_type: The memory type is enabled.
+ * @flags: TTM_MEMTYPE_XX flags identifying the traits of the memory
+ * managed by this memory type.
+ * @gpu_offset: If used, the GPU offset of the first managed page of
+ * fixed memory or the first managed location in an aperture.
+ * @size: Size of the managed region.
+ * @func: structure pointer implementing the range manager. See above
+ * @move_lock: lock for move fence
+ * static information. bdev::driver::io_mem_free is never used.
+ * @lru: The lru list for this memory type.
+ * @move: The fence of the last pipelined move operation.
+ *
+ * This structure is used to identify and manage memory types for a device.
+ */
+struct ttm_resource_manager {
+	/*
+	 * No protection. Constant from start.
+	 */
+	bool use_type;
+	bool use_tt;
+	uint64_t size;
+	const struct ttm_resource_manager_func *func;
+	spinlock_t move_lock;
+
+	/*
+	 * Protected by the global->lru_lock.
+	 */
+
+	struct list_head lru[TTM_MAX_BO_PRIORITY];
+
+	/*
+	 * Protected by @move_lock.
+	 */
+	struct dma_fence *move;
+};
+
+/**
+ * struct ttm_bus_placement
+ *
+ * @addr:		mapped virtual address
+ * @offset:		physical addr
+ * @is_iomem:		is this io memory ?
+ *
+ * Structure indicating the bus placement of an object.
+ */
+struct ttm_bus_placement {
+	void		*addr;
+	phys_addr_t	offset;
+	bool		is_iomem;
+};
+
+/**
+ * struct ttm_resource
+ *
+ * @mm_node: Memory manager node.
+ * @size: Requested size of memory region.
+ * @num_pages: Actual size of memory region in pages.
+ * @page_alignment: Page alignment.
+ * @placement: Placement flags.
+ * @bus: Placement on io bus accessible to the CPU
+ *
+ * Structure indicating the placement and space resources used by a
+ * buffer object.
+ */
+struct ttm_resource {
+	void *mm_node;
+	unsigned long start;
+	unsigned long size;
+	unsigned long num_pages;
+	uint32_t page_alignment;
+	uint32_t mem_type;
+	uint32_t placement;
+	struct ttm_bus_placement bus;
+};
+
+/**
+ * ttm_resource_manager_set_used
+ *
+ * @man: A memory manager object.
+ * @used: usage state to set.
+ *
+ * Set the manager in use flag. If disabled the manager is no longer
+ * used for object placement.
+ */
+static inline void
+ttm_resource_manager_set_used(struct ttm_resource_manager *man, bool used)
+{
+	man->use_type = used;
+}
+
+/**
+ * ttm_resource_manager_used
+ *
+ * @man: Manager to get used state for
+ *
+ * Get the in use flag for a manager.
+ * Returns:
+ * true is used, false if not.
+ */
+static inline bool ttm_resource_manager_used(struct ttm_resource_manager *man)
+{
+	return man->use_type;
+}
+
+/**
+ * ttm_resource_manager_cleanup
+ *
+ * @man: A memory manager object.
+ *
+ * Cleanup the move fences from the memory manager object.
+ */
+static inline void
+ttm_resource_manager_cleanup(struct ttm_resource_manager *man)
+{
+	dma_fence_put(man->move);
+	man->move = NULL;
+}
+
+int ttm_resource_alloc(struct ttm_buffer_object *bo,
+		       const struct ttm_place *place,
+		       struct ttm_resource *res);
+void ttm_resource_free(struct ttm_buffer_object *bo, struct ttm_resource *res);
+
+void ttm_resource_manager_init(struct ttm_resource_manager *man,
+			       unsigned long p_size);
+
+int ttm_resource_manager_force_list_clean(struct ttm_bo_device *bdev,
+					  struct ttm_resource_manager *man);
+
+void ttm_resource_manager_debug(struct ttm_resource_manager *man,
+				struct drm_printer *p);
+
+#endif
diff --git a/include/drm/ttm/ttm_set_memory.h b/include/drm/ttm/ttm_set_memory.h
new file mode 100644
index 000000000..7c492b49e
--- /dev/null
+++ b/include/drm/ttm/ttm_set_memory.h
@@ -0,0 +1,150 @@
+/**************************************************************************
+ *
+ * Copyright (c) 2018 Advanced Micro Devices, Inc.
+ * All Rights Reserved.
+ *
+ * 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, sub license, 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 NON-INFRINGEMENT. IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDERS, AUTHORS 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.
+ *
+ **************************************************************************/
+/*
+ * Authors: Huang Rui <ray.huang@amd.com>
+ */
+
+#ifndef TTM_SET_MEMORY
+#define TTM_SET_MEMORY
+
+#include <linux/mm.h>
+
+#ifdef CONFIG_X86
+
+#include <asm/set_memory.h>
+
+static inline int ttm_set_pages_array_wb(struct page **pages, int addrinarray)
+{
+	return set_pages_array_wb(pages, addrinarray);
+}
+
+static inline int ttm_set_pages_array_wc(struct page **pages, int addrinarray)
+{
+	return set_pages_array_wc(pages, addrinarray);
+}
+
+static inline int ttm_set_pages_array_uc(struct page **pages, int addrinarray)
+{
+	return set_pages_array_uc(pages, addrinarray);
+}
+
+static inline int ttm_set_pages_wb(struct page *page, int numpages)
+{
+	return set_pages_wb(page, numpages);
+}
+
+static inline int ttm_set_pages_wc(struct page *page, int numpages)
+{
+	unsigned long addr = (unsigned long)page_address(page);
+
+	return set_memory_wc(addr, numpages);
+}
+
+static inline int ttm_set_pages_uc(struct page *page, int numpages)
+{
+	return set_pages_uc(page, numpages);
+}
+
+#else /* for CONFIG_X86 */
+
+#if IS_ENABLED(CONFIG_AGP)
+
+#include <asm/agp.h>
+
+static inline int ttm_set_pages_array_wb(struct page **pages, int addrinarray)
+{
+	int i;
+
+	for (i = 0; i < addrinarray; i++)
+		unmap_page_from_agp(pages[i]);
+	return 0;
+}
+
+static inline int ttm_set_pages_array_wc(struct page **pages, int addrinarray)
+{
+	int i;
+
+	for (i = 0; i < addrinarray; i++)
+		map_page_into_agp(pages[i]);
+	return 0;
+}
+
+static inline int ttm_set_pages_array_uc(struct page **pages, int addrinarray)
+{
+	int i;
+
+	for (i = 0; i < addrinarray; i++)
+		map_page_into_agp(pages[i]);
+	return 0;
+}
+
+static inline int ttm_set_pages_wb(struct page *page, int numpages)
+{
+	int i;
+
+	for (i = 0; i < numpages; i++)
+		unmap_page_from_agp(page++);
+	return 0;
+}
+
+#else /* for CONFIG_AGP */
+
+static inline int ttm_set_pages_array_wb(struct page **pages, int addrinarray)
+{
+	return 0;
+}
+
+static inline int ttm_set_pages_array_wc(struct page **pages, int addrinarray)
+{
+	return 0;
+}
+
+static inline int ttm_set_pages_array_uc(struct page **pages, int addrinarray)
+{
+	return 0;
+}
+
+static inline int ttm_set_pages_wb(struct page *page, int numpages)
+{
+	return 0;
+}
+
+#endif /* for CONFIG_AGP */
+
+static inline int ttm_set_pages_wc(struct page *page, int numpages)
+{
+	return 0;
+}
+
+static inline int ttm_set_pages_uc(struct page *page, int numpages)
+{
+	return 0;
+}
+
+#endif /* for CONFIG_X86 */
+
+#endif
diff --git a/include/drm/ttm/ttm_tt.h b/include/drm/ttm/ttm_tt.h
new file mode 100644
index 000000000..75208c0a0
--- /dev/null
+++ b/include/drm/ttm/ttm_tt.h
@@ -0,0 +1,232 @@
+/**************************************************************************
+ *
+ * Copyright (c) 2006-2009 Vmware, Inc., Palo Alto, CA., USA
+ * All Rights Reserved.
+ *
+ * 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, sub license, 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 NON-INFRINGEMENT. IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDERS, AUTHORS 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.
+ *
+ **************************************************************************/
+#ifndef _TTM_TT_H_
+#define _TTM_TT_H_
+
+#include <linux/types.h>
+
+struct ttm_tt;
+struct ttm_resource;
+struct ttm_buffer_object;
+struct ttm_operation_ctx;
+
+#define TTM_PAGE_FLAG_WRITE           (1 << 3)
+#define TTM_PAGE_FLAG_SWAPPED         (1 << 4)
+#define TTM_PAGE_FLAG_PERSISTENT_SWAP (1 << 5)
+#define TTM_PAGE_FLAG_ZERO_ALLOC      (1 << 6)
+#define TTM_PAGE_FLAG_DMA32           (1 << 7)
+#define TTM_PAGE_FLAG_SG              (1 << 8)
+#define TTM_PAGE_FLAG_NO_RETRY	      (1 << 9)
+
+#define TTM_PAGE_FLAG_PRIV_POPULATED  (1 << 31)
+
+enum ttm_caching_state {
+	tt_uncached,
+	tt_wc,
+	tt_cached
+};
+
+/**
+ * struct ttm_tt
+ *
+ * @pages: Array of pages backing the data.
+ * @num_pages: Number of pages in the page array.
+ * @bdev: Pointer to the current struct ttm_bo_device.
+ * @be: Pointer to the ttm backend.
+ * @swap_storage: Pointer to shmem struct file for swap storage.
+ * @caching_state: The current caching state of the pages.
+ * @state: The current binding state of the pages.
+ *
+ * This is a structure holding the pages, caching- and aperture binding
+ * status for a buffer object that isn't backed by fixed (VRAM / AGP)
+ * memory.
+ */
+struct ttm_tt {
+	struct page **pages;
+	uint32_t page_flags;
+	unsigned long num_pages;
+	struct sg_table *sg; /* for SG objects via dma-buf */
+	struct file *swap_storage;
+	enum ttm_caching_state caching_state;
+};
+
+static inline bool ttm_tt_is_populated(struct ttm_tt *tt)
+{
+	return tt->page_flags & TTM_PAGE_FLAG_PRIV_POPULATED;
+}
+
+static inline void ttm_tt_set_unpopulated(struct ttm_tt *tt)
+{
+	tt->page_flags &= ~TTM_PAGE_FLAG_PRIV_POPULATED;
+}
+
+static inline void ttm_tt_set_populated(struct ttm_tt *tt)
+{
+	tt->page_flags |= TTM_PAGE_FLAG_PRIV_POPULATED;
+}
+
+/**
+ * struct ttm_dma_tt
+ *
+ * @ttm: Base ttm_tt struct.
+ * @dma_address: The DMA (bus) addresses of the pages
+ * @pages_list: used by some page allocation backend
+ *
+ * This is a structure holding the pages, caching- and aperture binding
+ * status for a buffer object that isn't backed by fixed (VRAM / AGP)
+ * memory.
+ */
+struct ttm_dma_tt {
+	struct ttm_tt ttm;
+	dma_addr_t *dma_address;
+	struct list_head pages_list;
+};
+
+/**
+ * ttm_tt_create
+ *
+ * @bo: pointer to a struct ttm_buffer_object
+ * @zero_alloc: true if allocated pages needs to be zeroed
+ *
+ * Make sure we have a TTM structure allocated for the given BO.
+ * No pages are actually allocated.
+ */
+int ttm_tt_create(struct ttm_buffer_object *bo, bool zero_alloc);
+
+/**
+ * ttm_tt_init
+ *
+ * @ttm: The struct ttm_tt.
+ * @bo: The buffer object we create the ttm for.
+ * @page_flags: Page flags as identified by TTM_PAGE_FLAG_XX flags.
+ *
+ * Create a struct ttm_tt to back data with system memory pages.
+ * No pages are actually allocated.
+ * Returns:
+ * NULL: Out of memory.
+ */
+int ttm_tt_init(struct ttm_tt *ttm, struct ttm_buffer_object *bo,
+		uint32_t page_flags);
+int ttm_dma_tt_init(struct ttm_dma_tt *ttm_dma, struct ttm_buffer_object *bo,
+		    uint32_t page_flags);
+int ttm_sg_tt_init(struct ttm_dma_tt *ttm_dma, struct ttm_buffer_object *bo,
+		   uint32_t page_flags);
+
+/**
+ * ttm_tt_fini
+ *
+ * @ttm: the ttm_tt structure.
+ *
+ * Free memory of ttm_tt structure
+ */
+void ttm_tt_fini(struct ttm_tt *ttm);
+void ttm_dma_tt_fini(struct ttm_dma_tt *ttm_dma);
+
+/**
+ * ttm_ttm_destroy:
+ *
+ * @ttm: The struct ttm_tt.
+ *
+ * Unbind, unpopulate and destroy common struct ttm_tt.
+ */
+void ttm_tt_destroy(struct ttm_bo_device *bdev, struct ttm_tt *ttm);
+
+/**
+ * ttm_tt_destroy_common:
+ *
+ * Called from driver to destroy common path.
+ */
+void ttm_tt_destroy_common(struct ttm_bo_device *bdev, struct ttm_tt *ttm);
+
+/**
+ * ttm_tt_swapin:
+ *
+ * @ttm: The struct ttm_tt.
+ *
+ * Swap in a previously swap out ttm_tt.
+ */
+int ttm_tt_swapin(struct ttm_tt *ttm);
+
+/**
+ * ttm_tt_set_placement_caching:
+ *
+ * @ttm A struct ttm_tt the backing pages of which will change caching policy.
+ * @placement: Flag indicating the desired caching policy.
+ *
+ * This function will change caching policy of any default kernel mappings of
+ * the pages backing @ttm. If changing from cached to uncached or
+ * write-combined,
+ * all CPU caches will first be flushed to make sure the data of the pages
+ * hit RAM. This function may be very costly as it involves global TLB
+ * and cache flushes and potential page splitting / combining.
+ */
+int ttm_tt_set_placement_caching(struct ttm_tt *ttm, uint32_t placement);
+int ttm_tt_swapout(struct ttm_bo_device *bdev, struct ttm_tt *ttm, struct file *persistent_swap_storage);
+
+/**
+ * ttm_tt_populate - allocate pages for a ttm
+ *
+ * @ttm: Pointer to the ttm_tt structure
+ *
+ * Calls the driver method to allocate pages for a ttm
+ */
+int ttm_tt_populate(struct ttm_bo_device *bdev, struct ttm_tt *ttm, struct ttm_operation_ctx *ctx);
+
+/**
+ * ttm_tt_unpopulate - free pages from a ttm
+ *
+ * @ttm: Pointer to the ttm_tt structure
+ *
+ * Calls the driver method to free all pages from a ttm
+ */
+void ttm_tt_unpopulate(struct ttm_bo_device *bdev, struct ttm_tt *ttm);
+
+#if IS_ENABLED(CONFIG_AGP)
+#include <linux/agp_backend.h>
+
+/**
+ * ttm_agp_tt_create
+ *
+ * @bo: Buffer object we allocate the ttm for.
+ * @bridge: The agp bridge this device is sitting on.
+ * @page_flags: Page flags as identified by TTM_PAGE_FLAG_XX flags.
+ *
+ *
+ * Create a TTM backend that uses the indicated AGP bridge as an aperture
+ * for TT memory. This function uses the linux agpgart interface to
+ * bind and unbind memory backing a ttm_tt.
+ */
+struct ttm_tt *ttm_agp_tt_create(struct ttm_buffer_object *bo,
+				 struct agp_bridge_data *bridge,
+				 uint32_t page_flags);
+int ttm_agp_bind(struct ttm_tt *ttm, struct ttm_resource *bo_mem);
+void ttm_agp_unbind(struct ttm_tt *ttm);
+void ttm_agp_destroy(struct ttm_tt *ttm);
+bool ttm_agp_is_bound(struct ttm_tt *ttm);
+#endif
+
+#endif