Merge branch 'vmwgfx-next' of git://people.freedesktop.org/~thomash/linux into drm-next

A couple of fixes from the previous pull request as well as gl3 support.
There is one drm core change, an export of a previously private function.

Take 2 implementing screen targets, this time with the fbdev code adjusted
accordingly.

Also there is an implementation of register-driven command buffers, that
overrides the FIFO ring for command processing. It's needed for our upcoming
hardware revision.
* 'vmwgfx-next' of git://people.freedesktop.org/~thomash/linux: (35 commits)
  drm/vmwgfx: Fix copyright headers
  drm/vmwgfx: Add DX query support. Various fixes.
  drm/vmwgfx: Add command parser support for a couple of DX commands
  drm/vmwgfx: Command parser fixes for DX
  drm/vmwgfx: Initial DX support
  drm/vmwgfx: Update device includes for DX device functionality
  drm: export the DRM permission check code
  drm/vmwgfx: Fix crash when unloading vmwgfx v2
  drm/vmwgfx: Fix framebuffer creation on older hardware
  drm/vmwgfx: Fixed topology boundary checking for Screen Targets
  drm/vmwgfx: Fix an uninitialized value
  drm/vmwgfx: Fix compiler warning with 32-bit dma_addr_t
  drm/vmwgfx: Kill a bunch of sparse warnings
  drm/vmwgfx: Fix kms preferred mode sorting
  drm/vmwgfx: Reinstate the legacy display system dirty callback
  drm/vmwgfx: Implement fbdev on kms v2
  drm/vmwgfx: Add a kernel interface to create a framebuffer v2
  drm/vmwgfx: Avoid cmdbuf alloc sleeping if !TASK_RUNNING
  drm/vmwgfx: Convert screen targets to new helpers v3
  drm/vmwgfx: Convert screen objects to the new helpers
  ...

1 files changed, 825 insertions, 826 deletions

diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c b/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c
index 2adc11bc0920..61fb7f3de311 100644
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c
+++ b/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c
@@ -1,6 +1,6 @@
 /**************************************************************************
  *
- * Copyright © 2009 VMware, Inc., Palo Alto, CA., USA
+ * Copyright © 2009-2015 VMware, Inc., Palo Alto, CA., USA
  * All Rights Reserved.
  *
  * Permission is hereby granted, free of charge, to any person obtaining a
@@ -31,45 +31,7 @@
 /* Might need a hrtimer here? */
 #define VMWGFX_PRESENT_RATE ((HZ / 60 > 0) ? HZ / 60 : 1)
 
-
-struct vmw_clip_rect {
-	int x1, x2, y1, y2;
-};
-
-/**
- * Clip @num_rects number of @rects against @clip storing the
- * results in @out_rects and the number of passed rects in @out_num.
- */
-static void vmw_clip_cliprects(struct drm_clip_rect *rects,
-			int num_rects,
-			struct vmw_clip_rect clip,
-			SVGASignedRect *out_rects,
-			int *out_num)
-{
-	int i, k;
-
-	for (i = 0, k = 0; i < num_rects; i++) {
-		int x1 = max_t(int, clip.x1, rects[i].x1);
-		int y1 = max_t(int, clip.y1, rects[i].y1);
-		int x2 = min_t(int, clip.x2, rects[i].x2);
-		int y2 = min_t(int, clip.y2, rects[i].y2);
-
-		if (x1 >= x2)
-			continue;
-		if (y1 >= y2)
-			continue;
-
-		out_rects[k].left   = x1;
-		out_rects[k].top    = y1;
-		out_rects[k].right  = x2;
-		out_rects[k].bottom = y2;
-		k++;
-	}
-
-	*out_num = k;
-}
-
-void vmw_display_unit_cleanup(struct vmw_display_unit *du)
+void vmw_du_cleanup(struct vmw_display_unit *du)
 {
 	if (du->cursor_surface)
 		vmw_surface_unreference(&du->cursor_surface);
@@ -109,12 +71,12 @@ int vmw_cursor_update_image(struct vmw_private *dev_priv,
 
 	memcpy(&cmd[1], image, image_size);
 
-	cmd->cmd = cpu_to_le32(SVGA_CMD_DEFINE_ALPHA_CURSOR);
-	cmd->cursor.id = cpu_to_le32(0);
-	cmd->cursor.width = cpu_to_le32(width);
-	cmd->cursor.height = cpu_to_le32(height);
-	cmd->cursor.hotspotX = cpu_to_le32(hotspotX);
-	cmd->cursor.hotspotY = cpu_to_le32(hotspotY);
+	cmd->cmd = SVGA_CMD_DEFINE_ALPHA_CURSOR;
+	cmd->cursor.id = 0;
+	cmd->cursor.width = width;
+	cmd->cursor.height = height;
+	cmd->cursor.hotspotX = hotspotX;
+	cmd->cursor.hotspotY = hotspotY;
 
 	vmw_fifo_commit(dev_priv, cmd_size);
 
@@ -161,7 +123,7 @@ err_unreserve:
 void vmw_cursor_update_position(struct vmw_private *dev_priv,
 				bool show, int x, int y)
 {
-	__le32 __iomem *fifo_mem = dev_priv->mmio_virt;
+	u32 __iomem *fifo_mem = dev_priv->mmio_virt;
 	uint32_t count;
 
 	iowrite32(show ? 1 : 0, fifo_mem + SVGA_FIFO_CURSOR_ON);
@@ -367,15 +329,6 @@ void vmw_kms_cursor_snoop(struct vmw_surface *srf,
 
 	srf->snooper.age++;
 
-	/* we can't call this function from this function since execbuf has
-	 * reserved fifo space.
-	 *
-	 * if (srf->snooper.crtc)
-	 *	vmw_ldu_crtc_cursor_update_image(dev_priv,
-	 *					 srf->snooper.image, 64, 64,
-	 *					 du->hotspot_x, du->hotspot_y);
-	 */
-
 	ttm_bo_kunmap(&map);
 err_unreserve:
 	ttm_bo_unreserve(bo);
@@ -412,183 +365,19 @@ void vmw_kms_cursor_post_execbuf(struct vmw_private *dev_priv)
  * Surface framebuffer code
  */
 
-#define vmw_framebuffer_to_vfbs(x) \
-	container_of(x, struct vmw_framebuffer_surface, base.base)
-
-struct vmw_framebuffer_surface {
-	struct vmw_framebuffer base;
-	struct vmw_surface *surface;
-	struct vmw_dma_buffer *buffer;
-	struct list_head head;
-	struct drm_master *master;
-};
-
 static void vmw_framebuffer_surface_destroy(struct drm_framebuffer *framebuffer)
 {
 	struct vmw_framebuffer_surface *vfbs =
 		vmw_framebuffer_to_vfbs(framebuffer);
-	struct vmw_master *vmaster = vmw_master(vfbs->master);
-
 
-	mutex_lock(&vmaster->fb_surf_mutex);
-	list_del(&vfbs->head);
-	mutex_unlock(&vmaster->fb_surf_mutex);
-
-	drm_master_put(&vfbs->master);
 	drm_framebuffer_cleanup(framebuffer);
 	vmw_surface_unreference(&vfbs->surface);
-	ttm_base_object_unref(&vfbs->base.user_obj);
+	if (vfbs->base.user_obj)
+		ttm_base_object_unref(&vfbs->base.user_obj);
 
 	kfree(vfbs);
 }
 
-static int do_surface_dirty_sou(struct vmw_private *dev_priv,
-				struct drm_file *file_priv,
-				struct vmw_framebuffer *framebuffer,
-				unsigned flags, unsigned color,
-				struct drm_clip_rect *clips,
-				unsigned num_clips, int inc,
-				struct vmw_fence_obj **out_fence)
-{
-	struct vmw_display_unit *units[VMWGFX_NUM_DISPLAY_UNITS];
-	struct drm_clip_rect *clips_ptr;
-	struct drm_clip_rect *tmp;
-	struct drm_crtc *crtc;
-	size_t fifo_size;
-	int i, num_units;
-	int ret = 0; /* silence warning */
-	int left, right, top, bottom;
-
-	struct {
-		SVGA3dCmdHeader header;
-		SVGA3dCmdBlitSurfaceToScreen body;
-	} *cmd;
-	SVGASignedRect *blits;
-
-	num_units = 0;
-	list_for_each_entry(crtc, &dev_priv->dev->mode_config.crtc_list,
-			    head) {
-		if (crtc->primary->fb != &framebuffer->base)
-			continue;
-		units[num_units++] = vmw_crtc_to_du(crtc);
-	}
-
-	BUG_ON(!clips || !num_clips);
-
-	tmp = kzalloc(sizeof(*tmp) * num_clips, GFP_KERNEL);
-	if (unlikely(tmp == NULL)) {
-		DRM_ERROR("Temporary cliprect memory alloc failed.\n");
-		return -ENOMEM;
-	}
-
-	fifo_size = sizeof(*cmd) + sizeof(SVGASignedRect) * num_clips;
-	cmd = kzalloc(fifo_size, GFP_KERNEL);
-	if (unlikely(cmd == NULL)) {
-		DRM_ERROR("Temporary fifo memory alloc failed.\n");
-		ret = -ENOMEM;
-		goto out_free_tmp;
-	}
-
-	/* setup blits pointer */
-	blits = (SVGASignedRect *)&cmd[1];
-
-	/* initial clip region */
-	left = clips->x1;
-	right = clips->x2;
-	top = clips->y1;
-	bottom = clips->y2;
-
-	/* skip the first clip rect */
-	for (i = 1, clips_ptr = clips + inc;
-	     i < num_clips; i++, clips_ptr += inc) {
-		left = min_t(int, left, (int)clips_ptr->x1);
-		right = max_t(int, right, (int)clips_ptr->x2);
-		top = min_t(int, top, (int)clips_ptr->y1);
-		bottom = max_t(int, bottom, (int)clips_ptr->y2);
-	}
-
-	/* only need to do this once */
-	cmd->header.id = cpu_to_le32(SVGA_3D_CMD_BLIT_SURFACE_TO_SCREEN);
-	cmd->header.size = cpu_to_le32(fifo_size - sizeof(cmd->header));
-
-	cmd->body.srcRect.left = left;
-	cmd->body.srcRect.right = right;
-	cmd->body.srcRect.top = top;
-	cmd->body.srcRect.bottom = bottom;
-
-	clips_ptr = clips;
-	for (i = 0; i < num_clips; i++, clips_ptr += inc) {
-		tmp[i].x1 = clips_ptr->x1 - left;
-		tmp[i].x2 = clips_ptr->x2 - left;
-		tmp[i].y1 = clips_ptr->y1 - top;
-		tmp[i].y2 = clips_ptr->y2 - top;
-	}
-
-	/* do per unit writing, reuse fifo for each */
-	for (i = 0; i < num_units; i++) {
-		struct vmw_display_unit *unit = units[i];
-		struct vmw_clip_rect clip;
-		int num;
-
-		clip.x1 = left - unit->crtc.x;
-		clip.y1 = top - unit->crtc.y;
-		clip.x2 = right - unit->crtc.x;
-		clip.y2 = bottom - unit->crtc.y;
-
-		/* skip any crtcs that misses the clip region */
-		if (clip.x1 >= unit->crtc.mode.hdisplay ||
-		    clip.y1 >= unit->crtc.mode.vdisplay ||
-		    clip.x2 <= 0 || clip.y2 <= 0)
-			continue;
-
-		/*
-		 * In order for the clip rects to be correctly scaled
-		 * the src and dest rects needs to be the same size.
-		 */
-		cmd->body.destRect.left = clip.x1;
-		cmd->body.destRect.right = clip.x2;
-		cmd->body.destRect.top = clip.y1;
-		cmd->body.destRect.bottom = clip.y2;
-
-		/* create a clip rect of the crtc in dest coords */
-		clip.x2 = unit->crtc.mode.hdisplay - clip.x1;
-		clip.y2 = unit->crtc.mode.vdisplay - clip.y1;
-		clip.x1 = 0 - clip.x1;
-		clip.y1 = 0 - clip.y1;
-
-		/* need to reset sid as it is changed by execbuf */
-		cmd->body.srcImage.sid = cpu_to_le32(framebuffer->user_handle);
-		cmd->body.destScreenId = unit->unit;
-
-		/* clip and write blits to cmd stream */
-		vmw_clip_cliprects(tmp, num_clips, clip, blits, &num);
-
-		/* if no cliprects hit skip this */
-		if (num == 0)
-			continue;
-
-		/* only return the last fence */
-		if (out_fence && *out_fence)
-			vmw_fence_obj_unreference(out_fence);
-
-		/* recalculate package length */
-		fifo_size = sizeof(*cmd) + sizeof(SVGASignedRect) * num;
-		cmd->header.size = cpu_to_le32(fifo_size - sizeof(cmd->header));
-		ret = vmw_execbuf_process(file_priv, dev_priv, NULL, cmd,
-					  fifo_size, 0, NULL, out_fence);
-
-		if (unlikely(ret != 0))
-			break;
-	}
-
-
-	kfree(cmd);
-out_free_tmp:
-	kfree(tmp);
-
-	return ret;
-}
-
 static int vmw_framebuffer_surface_dirty(struct drm_framebuffer *framebuffer,
 				  struct drm_file *file_priv,
 				  unsigned flags, unsigned color,
@@ -601,11 +390,8 @@ static int vmw_framebuffer_surface_dirty(struct drm_framebuffer *framebuffer,
 	struct drm_clip_rect norect;
 	int ret, inc = 1;
 
-	if (unlikely(vfbs->master != file_priv->master))
-		return -EINVAL;
-
-	/* Require ScreenObject support for 3D */
-	if (!dev_priv->sou_priv)
+	/* Legacy Display Unit does not support 3D */
+	if (dev_priv->active_display_unit == vmw_du_legacy)
 		return -EINVAL;
 
 	drm_modeset_lock_all(dev_priv->dev);
@@ -627,10 +413,16 @@ static int vmw_framebuffer_surface_dirty(struct drm_framebuffer *framebuffer,
 		inc = 2; /* skip source rects */
 	}
 
-	ret = do_surface_dirty_sou(dev_priv, file_priv, &vfbs->base,
-				   flags, color,
-				   clips, num_clips, inc, NULL);
+	if (dev_priv->active_display_unit == vmw_du_screen_object)
+		ret = vmw_kms_sou_do_surface_dirty(dev_priv, &vfbs->base,
+						   clips, NULL, NULL, 0, 0,
+						   num_clips, inc, NULL);
+	else
+		ret = vmw_kms_stdu_surface_dirty(dev_priv, &vfbs->base,
+						 clips, NULL, NULL, 0, 0,
+						 num_clips, inc, NULL);
 
+	vmw_fifo_flush(dev_priv, false);
 	ttm_read_unlock(&dev_priv->reservation_sem);
 
 	drm_modeset_unlock_all(dev_priv->dev);
@@ -638,27 +430,66 @@ static int vmw_framebuffer_surface_dirty(struct drm_framebuffer *framebuffer,
 	return 0;
 }
 
+/**
+ * vmw_kms_readback - Perform a readback from the screen system to
+ * a dma-buffer backed framebuffer.
+ *
+ * @dev_priv: Pointer to the device private structure.
+ * @file_priv: Pointer to a struct drm_file identifying the caller.
+ * Must be set to NULL if @user_fence_rep is NULL.
+ * @vfb: Pointer to the dma-buffer backed framebuffer.
+ * @user_fence_rep: User-space provided structure for fence information.
+ * Must be set to non-NULL if @file_priv is non-NULL.
+ * @vclips: Array of clip rects.
+ * @num_clips: Number of clip rects in @vclips.
+ *
+ * Returns 0 on success, negative error code on failure. -ERESTARTSYS if
+ * interrupted.
+ */
+int vmw_kms_readback(struct vmw_private *dev_priv,
+		     struct drm_file *file_priv,
+		     struct vmw_framebuffer *vfb,
+		     struct drm_vmw_fence_rep __user *user_fence_rep,
+		     struct drm_vmw_rect *vclips,
+		     uint32_t num_clips)
+{
+	switch (dev_priv->active_display_unit) {
+	case vmw_du_screen_object:
+		return vmw_kms_sou_readback(dev_priv, file_priv, vfb,
+					    user_fence_rep, vclips, num_clips);
+	case vmw_du_screen_target:
+		return vmw_kms_stdu_dma(dev_priv, file_priv, vfb,
+					user_fence_rep, NULL, vclips, num_clips,
+					1, false, true);
+	default:
+		WARN_ONCE(true,
+			  "Readback called with invalid display system.\n");
+}
+
+	return -ENOSYS;
+}
+
+
 static struct drm_framebuffer_funcs vmw_framebuffer_surface_funcs = {
 	.destroy = vmw_framebuffer_surface_destroy,
 	.dirty = vmw_framebuffer_surface_dirty,
 };
 
 static int vmw_kms_new_framebuffer_surface(struct vmw_private *dev_priv,
-					   struct drm_file *file_priv,
 					   struct vmw_surface *surface,
 					   struct vmw_framebuffer **out,
 					   const struct drm_mode_fb_cmd
-					   *mode_cmd)
+					   *mode_cmd,
+					   bool is_dmabuf_proxy)
 
 {
 	struct drm_device *dev = dev_priv->dev;
 	struct vmw_framebuffer_surface *vfbs;
 	enum SVGA3dSurfaceFormat format;
-	struct vmw_master *vmaster = vmw_master(file_priv->master);
 	int ret;
 
-	/* 3D is only supported on HWv8 hosts which supports screen objects */
-	if (!dev_priv->sou_priv)
+	/* 3D is only supported on HWv8 and newer hosts */
+	if (dev_priv->active_display_unit == vmw_du_legacy)
 		return -ENOSYS;
 
 	/*
@@ -692,15 +523,16 @@ static int vmw_kms_new_framebuffer_surface(struct vmw_private *dev_priv,
 	case 15:
 		format = SVGA3D_A1R5G5B5;
 		break;
-	case 8:
-		format = SVGA3D_LUMINANCE8;
-		break;
 	default:
 		DRM_ERROR("Invalid color depth: %d\n", mode_cmd->depth);
 		return -EINVAL;
 	}
 
-	if (unlikely(format != surface->format)) {
+	/*
+	 * For DX, surface format validation is done when surface->scanout
+	 * is set.
+	 */
+	if (!dev_priv->has_dx && format != surface->format) {
 		DRM_ERROR("Invalid surface format for requested mode.\n");
 		return -EINVAL;
 	}
@@ -711,38 +543,27 @@ static int vmw_kms_new_framebuffer_surface(struct vmw_private *dev_priv,
 		goto out_err1;
 	}
 
-	if (!vmw_surface_reference(surface)) {
-		DRM_ERROR("failed to reference surface %p\n", surface);
-		ret = -EINVAL;
-		goto out_err2;
-	}
-
 	/* XXX get the first 3 from the surface info */
 	vfbs->base.base.bits_per_pixel = mode_cmd->bpp;
 	vfbs->base.base.pitches[0] = mode_cmd->pitch;
 	vfbs->base.base.depth = mode_cmd->depth;
 	vfbs->base.base.width = mode_cmd->width;
 	vfbs->base.base.height = mode_cmd->height;
-	vfbs->surface = surface;
+	vfbs->surface = vmw_surface_reference(surface);
 	vfbs->base.user_handle = mode_cmd->handle;
-	vfbs->master = drm_master_get(file_priv->master);
-
-	mutex_lock(&vmaster->fb_surf_mutex);
-	list_add_tail(&vfbs->head, &vmaster->fb_surf);
-	mutex_unlock(&vmaster->fb_surf_mutex);
+	vfbs->is_dmabuf_proxy = is_dmabuf_proxy;
 
 	*out = &vfbs->base;
 
 	ret = drm_framebuffer_init(dev, &vfbs->base.base,
 				   &vmw_framebuffer_surface_funcs);
 	if (ret)
-		goto out_err3;
+		goto out_err2;
 
 	return 0;
 
-out_err3:
-	vmw_surface_unreference(&surface);
 out_err2:
+	vmw_surface_unreference(&surface);
 	kfree(vfbs);
 out_err1:
 	return ret;
@@ -752,14 +573,6 @@ out_err1:
  * Dmabuf framebuffer code
  */
 
-#define vmw_framebuffer_to_vfbd(x) \
-	container_of(x, struct vmw_framebuffer_dmabuf, base.base)
-
-struct vmw_framebuffer_dmabuf {
-	struct vmw_framebuffer base;
-	struct vmw_dma_buffer *buffer;
-};
-
 static void vmw_framebuffer_dmabuf_destroy(struct drm_framebuffer *framebuffer)
 {
 	struct vmw_framebuffer_dmabuf *vfbd =
@@ -767,185 +580,12 @@ static void vmw_framebuffer_dmabuf_destroy(struct drm_framebuffer *framebuffer)
 
 	drm_framebuffer_cleanup(framebuffer);
 	vmw_dmabuf_unreference(&vfbd->buffer);
-	ttm_base_object_unref(&vfbd->base.user_obj);
+	if (vfbd->base.user_obj)
+		ttm_base_object_unref(&vfbd->base.user_obj);
 
 	kfree(vfbd);
 }
 
-static int do_dmabuf_dirty_ldu(struct vmw_private *dev_priv,
-			       struct vmw_framebuffer *framebuffer,
-			       unsigned flags, unsigned color,
-			       struct drm_clip_rect *clips,
-			       unsigned num_clips, int increment)
-{
-	size_t fifo_size;
-	int i;
-
-	struct {
-		uint32_t header;
-		SVGAFifoCmdUpdate body;
-	} *cmd;
-
-	fifo_size = sizeof(*cmd) * num_clips;
-	cmd = vmw_fifo_reserve(dev_priv, fifo_size);
-	if (unlikely(cmd == NULL)) {
-		DRM_ERROR("Fifo reserve failed.\n");
-		return -ENOMEM;
-	}
-
-	memset(cmd, 0, fifo_size);
-	for (i = 0; i < num_clips; i++, clips += increment) {
-		cmd[i].header = cpu_to_le32(SVGA_CMD_UPDATE);
-		cmd[i].body.x = cpu_to_le32(clips->x1);
-		cmd[i].body.y = cpu_to_le32(clips->y1);
-		cmd[i].body.width = cpu_to_le32(clips->x2 - clips->x1);
-		cmd[i].body.height = cpu_to_le32(clips->y2 - clips->y1);
-	}
-
-	vmw_fifo_commit(dev_priv, fifo_size);
-	return 0;
-}
-
-static int do_dmabuf_define_gmrfb(struct drm_file *file_priv,
-				  struct vmw_private *dev_priv,
-				  struct vmw_framebuffer *framebuffer)
-{
-	int depth = framebuffer->base.depth;
-	size_t fifo_size;
-	int ret;
-
-	struct {
-		uint32_t header;
-		SVGAFifoCmdDefineGMRFB body;
-	} *cmd;
-
-	/* Emulate RGBA support, contrary to svga_reg.h this is not
-	 * supported by hosts. This is only a problem if we are reading
-	 * this value later and expecting what we uploaded back.
-	 */
-	if (depth == 32)
-		depth = 24;
-
-	fifo_size = sizeof(*cmd);
-	cmd = kmalloc(fifo_size, GFP_KERNEL);
-	if (unlikely(cmd == NULL)) {
-		DRM_ERROR("Failed to allocate temporary cmd buffer.\n");
-		return -ENOMEM;
-	}
-
-	memset(cmd, 0, fifo_size);
-	cmd->header = SVGA_CMD_DEFINE_GMRFB;
-	cmd->body.format.bitsPerPixel = framebuffer->base.bits_per_pixel;
-	cmd->body.format.colorDepth = depth;
-	cmd->body.format.reserved = 0;
-	cmd->body.bytesPerLine = framebuffer->base.pitches[0];
-	cmd->body.ptr.gmrId = framebuffer->user_handle;
-	cmd->body.ptr.offset = 0;
-
-	ret = vmw_execbuf_process(file_priv, dev_priv, NULL, cmd,
-				  fifo_size, 0, NULL, NULL);
-
-	kfree(cmd);
-
-	return ret;
-}
-
-static int do_dmabuf_dirty_sou(struct drm_file *file_priv,
-			       struct vmw_private *dev_priv,
-			       struct vmw_framebuffer *framebuffer,
-			       unsigned flags, unsigned color,
-			       struct drm_clip_rect *clips,
-			       unsigned num_clips, int increment,
-			       struct vmw_fence_obj **out_fence)
-{
-	struct vmw_display_unit *units[VMWGFX_NUM_DISPLAY_UNITS];
-	struct drm_clip_rect *clips_ptr;
-	int i, k, num_units, ret;
-	struct drm_crtc *crtc;
-	size_t fifo_size;
-
-	struct {
-		uint32_t header;
-		SVGAFifoCmdBlitGMRFBToScreen body;
-	} *blits;
-
-	ret = do_dmabuf_define_gmrfb(file_priv, dev_priv, framebuffer);
-	if (unlikely(ret != 0))
-		return ret; /* define_gmrfb prints warnings */
-
-	fifo_size = sizeof(*blits) * num_clips;
-	blits = kmalloc(fifo_size, GFP_KERNEL);
-	if (unlikely(blits == NULL)) {
-		DRM_ERROR("Failed to allocate temporary cmd buffer.\n");
-		return -ENOMEM;
-	}
-
-	num_units = 0;
-	list_for_each_entry(crtc, &dev_priv->dev->mode_config.crtc_list, head) {
-		if (crtc->primary->fb != &framebuffer->base)
-			continue;
-		units[num_units++] = vmw_crtc_to_du(crtc);
-	}
-
-	for (k = 0; k < num_units; k++) {
-		struct vmw_display_unit *unit = units[k];
-		int hit_num = 0;
-
-		clips_ptr = clips;
-		for (i = 0; i < num_clips; i++, clips_ptr += increment) {
-			int clip_x1 = clips_ptr->x1 - unit->crtc.x;
-			int clip_y1 = clips_ptr->y1 - unit->crtc.y;
-			int clip_x2 = clips_ptr->x2 - unit->crtc.x;
-			int clip_y2 = clips_ptr->y2 - unit->crtc.y;
-			int move_x, move_y;
-
-			/* skip any crtcs that misses the clip region */
-			if (clip_x1 >= unit->crtc.mode.hdisplay ||
-			    clip_y1 >= unit->crtc.mode.vdisplay ||
-			    clip_x2 <= 0 || clip_y2 <= 0)
-				continue;
-
-			/* clip size to crtc size */
-			clip_x2 = min_t(int, clip_x2, unit->crtc.mode.hdisplay);
-			clip_y2 = min_t(int, clip_y2, unit->crtc.mode.vdisplay);
-
-			/* translate both src and dest to bring clip into screen */
-			move_x = min_t(int, clip_x1, 0);
-			move_y = min_t(int, clip_y1, 0);
-
-			/* actual translate done here */
-			blits[hit_num].header = SVGA_CMD_BLIT_GMRFB_TO_SCREEN;
-			blits[hit_num].body.destScreenId = unit->unit;
-			blits[hit_num].body.srcOrigin.x = clips_ptr->x1 - move_x;
-			blits[hit_num].body.srcOrigin.y = clips_ptr->y1 - move_y;
-			blits[hit_num].body.destRect.left = clip_x1 - move_x;
-			blits[hit_num].body.destRect.top = clip_y1 - move_y;
-			blits[hit_num].body.destRect.right = clip_x2;
-			blits[hit_num].body.destRect.bottom = clip_y2;
-			hit_num++;
-		}
-
-		/* no clips hit the crtc */
-		if (hit_num == 0)
-			continue;
-
-		/* only return the last fence */
-		if (out_fence && *out_fence)
-			vmw_fence_obj_unreference(out_fence);
-
-		fifo_size = sizeof(*blits) * hit_num;
-		ret = vmw_execbuf_process(file_priv, dev_priv, NULL, blits,
-					  fifo_size, 0, NULL, out_fence);
-
-		if (unlikely(ret != 0))
-			break;
-	}
-
-	kfree(blits);
-
-	return ret;
-}
-
 static int vmw_framebuffer_dmabuf_dirty(struct drm_framebuffer *framebuffer,
 				 struct drm_file *file_priv,
 				 unsigned flags, unsigned color,
@@ -977,16 +617,29 @@ static int vmw_framebuffer_dmabuf_dirty(struct drm_framebuffer *framebuffer,
 		increment = 2;
 	}
 
-	if (dev_priv->ldu_priv) {
-		ret = do_dmabuf_dirty_ldu(dev_priv, &vfbd->base,
-					  flags, color,
-					  clips, num_clips, increment);
-	} else {
-		ret = do_dmabuf_dirty_sou(file_priv, dev_priv, &vfbd->base,
-					  flags, color,
-					  clips, num_clips, increment, NULL);
+	switch (dev_priv->active_display_unit) {
+	case vmw_du_screen_target:
+		ret = vmw_kms_stdu_dma(dev_priv, NULL, &vfbd->base, NULL,
+				       clips, NULL, num_clips, increment,
+				       true, true);
+		break;
+	case vmw_du_screen_object:
+		ret = vmw_kms_sou_do_dmabuf_dirty(dev_priv, &vfbd->base,
+						  clips, num_clips, increment,
+						  true,
+						  NULL);
+		break;
+	case vmw_du_legacy:
+		ret = vmw_kms_ldu_do_dmabuf_dirty(dev_priv, &vfbd->base, 0, 0,
+						  clips, num_clips, increment);
+		break;
+	default:
+		ret = -EINVAL;
+		WARN_ONCE(true, "Dirty called with invalid display system.\n");
+		break;
 	}
 
+	vmw_fifo_flush(dev_priv, false);
 	ttm_read_unlock(&dev_priv->reservation_sem);
 
 	drm_modeset_unlock_all(dev_priv->dev);
@@ -1002,41 +655,133 @@ static struct drm_framebuffer_funcs vmw_framebuffer_dmabuf_funcs = {
 /**
  * Pin the dmabuffer to the start of vram.
  */
-static int vmw_framebuffer_dmabuf_pin(struct vmw_framebuffer *vfb)
+static int vmw_framebuffer_pin(struct vmw_framebuffer *vfb)
 {
 	struct vmw_private *dev_priv = vmw_priv(vfb->base.dev);
-	struct vmw_framebuffer_dmabuf *vfbd =
-		vmw_framebuffer_to_vfbd(&vfb->base);
+	struct vmw_dma_buffer *buf;
 	int ret;
 
-	/* This code should not be used with screen objects */
-	BUG_ON(dev_priv->sou_priv);
-
-	vmw_overlay_pause_all(dev_priv);
+	buf = vfb->dmabuf ?  vmw_framebuffer_to_vfbd(&vfb->base)->buffer :
+		vmw_framebuffer_to_vfbs(&vfb->base)->surface->res.backup;
 
-	ret = vmw_dmabuf_to_start_of_vram(dev_priv, vfbd->buffer, true, false);
-
-	vmw_overlay_resume_all(dev_priv);
+	if (!buf)
+		return 0;
 
-	WARN_ON(ret != 0);
+	switch (dev_priv->active_display_unit) {
+	case vmw_du_legacy:
+		vmw_overlay_pause_all(dev_priv);
+		ret = vmw_dmabuf_pin_in_start_of_vram(dev_priv, buf, false);
+		vmw_overlay_resume_all(dev_priv);
+		break;
+	case vmw_du_screen_object:
+	case vmw_du_screen_target:
+		if (vfb->dmabuf)
+			return vmw_dmabuf_pin_in_vram_or_gmr(dev_priv, buf,
+							     false);
+
+		return vmw_dmabuf_pin_in_placement(dev_priv, buf,
+						   &vmw_mob_placement, false);
+	default:
+		return -EINVAL;
+	}
 
-	return 0;
+	return ret;
 }
 
-static int vmw_framebuffer_dmabuf_unpin(struct vmw_framebuffer *vfb)
+static int vmw_framebuffer_unpin(struct vmw_framebuffer *vfb)
 {
 	struct vmw_private *dev_priv = vmw_priv(vfb->base.dev);
-	struct vmw_framebuffer_dmabuf *vfbd =
-		vmw_framebuffer_to_vfbd(&vfb->base);
+	struct vmw_dma_buffer *buf;
 
-	if (!vfbd->buffer) {
-		WARN_ON(!vfbd->buffer);
+	buf = vfb->dmabuf ?  vmw_framebuffer_to_vfbd(&vfb->base)->buffer :
+		vmw_framebuffer_to_vfbs(&vfb->base)->surface->res.backup;
+
+	if (WARN_ON(!buf))
 		return 0;
+
+	return vmw_dmabuf_unpin(dev_priv, buf, false);
+}
+
+/**
+ * vmw_create_dmabuf_proxy - create a proxy surface for the DMA buf
+ *
+ * @dev: DRM device
+ * @mode_cmd: parameters for the new surface
+ * @dmabuf_mob: MOB backing the DMA buf
+ * @srf_out: newly created surface
+ *
+ * When the content FB is a DMA buf, we create a surface as a proxy to the
+ * same buffer.  This way we can do a surface copy rather than a surface DMA.
+ * This is a more efficient approach
+ *
+ * RETURNS:
+ * 0 on success, error code otherwise
+ */
+static int vmw_create_dmabuf_proxy(struct drm_device *dev,
+				   const struct drm_mode_fb_cmd *mode_cmd,
+				   struct vmw_dma_buffer *dmabuf_mob,
+				   struct vmw_surface **srf_out)
+{
+	uint32_t format;
+	struct drm_vmw_size content_base_size;
+	struct vmw_resource *res;
+	int ret;
+
+	switch (mode_cmd->depth) {
+	case 32:
+	case 24:
+		format = SVGA3D_X8R8G8B8;
+		break;
+
+	case 16:
+	case 15:
+		format = SVGA3D_R5G6B5;
+		break;
+
+	case 8:
+		format = SVGA3D_P8;
+		break;
+
+	default:
+		DRM_ERROR("Invalid framebuffer format %d\n", mode_cmd->depth);
+		return -EINVAL;
 	}
 
-	return vmw_dmabuf_unpin(dev_priv, vfbd->buffer, false);
+	content_base_size.width  = mode_cmd->width;
+	content_base_size.height = mode_cmd->height;
+	content_base_size.depth  = 1;
+
+	ret = vmw_surface_gb_priv_define(dev,
+			0, /* kernel visible only */
+			0, /* flags */
+			format,
+			true, /* can be a scanout buffer */
+			1, /* num of mip levels */
+			0,
+			0,
+			content_base_size,
+			srf_out);
+	if (ret) {
+		DRM_ERROR("Failed to allocate proxy content buffer\n");
+		return ret;
+	}
+
+	res = &(*srf_out)->res;
+
+	/* Reserve and switch the backing mob. */
+	mutex_lock(&res->dev_priv->cmdbuf_mutex);
+	(void) vmw_resource_reserve(res, false, true);
+	vmw_dmabuf_unreference(&res->backup);
+	res->backup = vmw_dmabuf_reference(dmabuf_mob);
+	res->backup_offset = 0;
+	vmw_resource_unreserve(res, false, NULL, 0);
+	mutex_unlock(&res->dev_priv->cmdbuf_mutex);
+
+	return 0;
 }
 
+
+
 static int vmw_kms_new_framebuffer_dmabuf(struct vmw_private *dev_priv,
 					  struct vmw_dma_buffer *dmabuf,
 					  struct vmw_framebuffer **out,
@@ -1057,7 +802,7 @@ static int vmw_kms_new_framebuffer_dmabuf(struct vmw_private *dev_priv,
 	}
 
 	/* Limited framebuffer color depth support for screen objects */
-	if (dev_priv->sou_priv) {
+	if (dev_priv->active_display_unit == vmw_du_screen_object) {
 		switch (mode_cmd->depth) {
 		case 32:
 		case 24:
@@ -1089,41 +834,96 @@ static int vmw_kms_new_framebuffer_dmabuf(struct vmw_private *dev_priv,
 		goto out_err1;
 	}
 
-	if (!vmw_dmabuf_reference(dmabuf)) {
-		DRM_ERROR("failed to reference dmabuf %p\n", dmabuf);
-		ret = -EINVAL;
-		goto out_err2;
-	}
-
 	vfbd->base.base.bits_per_pixel = mode_cmd->bpp;
 	vfbd->base.base.pitches[0] = mode_cmd->pitch;
 	vfbd->base.base.depth = mode_cmd->depth;
 	vfbd->base.base.width = mode_cmd->width;
 	vfbd->base.base.height = mode_cmd->height;
-	if (!dev_priv->sou_priv) {
-		vfbd->base.pin = vmw_framebuffer_dmabuf_pin;
-		vfbd->base.unpin = vmw_framebuffer_dmabuf_unpin;
-	}
 	vfbd->base.dmabuf = true;
-	vfbd->buffer = dmabuf;
+	vfbd->buffer = vmw_dmabuf_reference(dmabuf);
 	vfbd->base.user_handle = mode_cmd->handle;
 	*out = &vfbd->base;
 
 	ret = drm_framebuffer_init(dev, &vfbd->base.base,
 				   &vmw_framebuffer_dmabuf_funcs);
 	if (ret)
-		goto out_err3;
+		goto out_err2;
 
 	return 0;
 
-out_err3:
-	vmw_dmabuf_unreference(&dmabuf);
 out_err2:
+	vmw_dmabuf_unreference(&dmabuf);
 	kfree(vfbd);
 out_err1:
 	return ret;
 }
 
+/**
+ * vmw_kms_new_framebuffer - Create a new framebuffer.
+ *
+ * @dev_priv: Pointer to device private struct.
+ * @dmabuf: Pointer to dma buffer to wrap the kms framebuffer around.
+ * Either @dmabuf or @surface must be NULL.
+ * @surface: Pointer to a surface to wrap the kms framebuffer around.
+ * Either @dmabuf or @surface must be NULL.
+ * @only_2d: No presents will occur to this dma buffer based framebuffer. This
+ * Helps the code to do some important optimizations.
+ * @mode_cmd: Frame-buffer metadata.
+ */
+struct vmw_framebuffer *
+vmw_kms_new_framebuffer(struct vmw_private *dev_priv,
+			struct vmw_dma_buffer *dmabuf,
+			struct vmw_surface *surface,
+			bool only_2d,
+			const struct drm_mode_fb_cmd *mode_cmd)
+{
+	struct vmw_framebuffer *vfb = NULL;
+	bool is_dmabuf_proxy = false;
+	int ret;
+
+	/*
+	 * We cannot use the SurfaceDMA command in an non-accelerated VM,
+	 * therefore, wrap the DMA buf in a surface so we can use the
+	 * SurfaceCopy command.
+	 */
+	if (dmabuf && only_2d &&
+	    dev_priv->active_display_unit == vmw_du_screen_target) {
+		ret = vmw_create_dmabuf_proxy(dev_priv->dev, mode_cmd,
+					      dmabuf, &surface);
+		if (ret)
+			return ERR_PTR(ret);
+
+		is_dmabuf_proxy = true;
+	}
+
+	/* Create the new framebuffer depending one what we have */
+	if (surface) {
+		ret = vmw_kms_new_framebuffer_surface(dev_priv, surface, &vfb,
+						      mode_cmd,
+						      is_dmabuf_proxy);
+
+		/*
+		 * vmw_create_dmabuf_proxy() adds a reference that is no longer
+		 * needed
+		 */
+		if (is_dmabuf_proxy)
+			vmw_surface_unreference(&surface);
+	} else if (dmabuf) {
+		ret = vmw_kms_new_framebuffer_dmabuf(dev_priv, dmabuf, &vfb,
+						     mode_cmd);
+	} else {
+		BUG();
+	}
+
+	if (ret)
+		return ERR_PTR(ret);
+
+	vfb->pin = vmw_framebuffer_pin;
+	vfb->unpin = vmw_framebuffer_unpin;
+
+	return vfb;
+}
+
 /*
  * Generic Kernel modesetting functions
  */
@@ -1157,7 +957,7 @@ static struct drm_framebuffer *vmw_kms_fb_create(struct drm_device *dev,
 	if (!vmw_kms_validate_mode_vram(dev_priv,
 					mode_cmd.pitch,
 					mode_cmd.height)) {
-		DRM_ERROR("VRAM size is too small for requested mode.\n");
+		DRM_ERROR("Requested mode exceed bounding box limit.\n");
 		return ERR_PTR(-ENOMEM);
 	}
 
@@ -1187,15 +987,13 @@ static struct drm_framebuffer *vmw_kms_fb_create(struct drm_device *dev,
 	if (ret)
 		goto err_out;
 
-	/* Create the new framebuffer depending one what we got back */
-	if (bo)
-		ret = vmw_kms_new_framebuffer_dmabuf(dev_priv, bo, &vfb,
-						     &mode_cmd);
-	else if (surface)
-		ret = vmw_kms_new_framebuffer_surface(dev_priv, file_priv,
-						      surface, &vfb, &mode_cmd);
-	else
-		BUG();
+	vfb = vmw_kms_new_framebuffer(dev_priv, bo, surface,
+				      !(dev_priv->capabilities & SVGA_CAP_3D),
+				      &mode_cmd);
+	if (IS_ERR(vfb)) {
+		ret = PTR_ERR(vfb);
+		goto err_out;
+ 	}
 
 err_out:
 	/* vmw_user_lookup_handle takes one ref so does new_fb */
@@ -1218,6 +1016,21 @@ static const struct drm_mode_config_funcs vmw_kms_funcs = {
 	.fb_create = vmw_kms_fb_create,
 };
 
+static int vmw_kms_generic_present(struct vmw_private *dev_priv,
+				   struct drm_file *file_priv,
+				   struct vmw_framebuffer *vfb,
+				   struct vmw_surface *surface,
+				   uint32_t sid,
+				   int32_t destX, int32_t destY,
+				   struct drm_vmw_rect *clips,
+				   uint32_t num_clips)
+{
+	return vmw_kms_sou_do_surface_dirty(dev_priv, vfb, NULL, clips,
+					    &surface->res, destX, destY,
+					    num_clips, 1, NULL);
+}
+
+
 int vmw_kms_present(struct vmw_private *dev_priv,
 		    struct drm_file *file_priv,
 		    struct vmw_framebuffer *vfb,
@@ -1227,238 +1040,31 @@ int vmw_kms_present(struct vmw_private *dev_priv,
 		    struct drm_vmw_rect *clips,
 		    uint32_t num_clips)
 {
-	struct vmw_display_unit *units[VMWGFX_NUM_DISPLAY_UNITS];
-	struct drm_clip_rect *tmp;
-	struct drm_crtc *crtc;
-	size_t fifo_size;
-	int i, k, num_units;
-	int ret = 0; /* silence warning */
-	int left, right, top, bottom;
-
-	struct {
-		SVGA3dCmdHeader header;
-		SVGA3dCmdBlitSurfaceToScreen body;
-	} *cmd;
-	SVGASignedRect *blits;
-
-	num_units = 0;
-	list_for_each_entry(crtc, &dev_priv->dev->mode_config.crtc_list, head) {
-		if (crtc->primary->fb != &vfb->base)
-			continue;
-		units[num_units++] = vmw_crtc_to_du(crtc);
-	}
-
-	BUG_ON(surface == NULL);
-	BUG_ON(!clips || !num_clips);
-
-	tmp = kzalloc(sizeof(*tmp) * num_clips, GFP_KERNEL);
-	if (unlikely(tmp == NULL)) {
-		DRM_ERROR("Temporary cliprect memory alloc failed.\n");
-		return -ENOMEM;
-	}
-
-	fifo_size = sizeof(*cmd) + sizeof(SVGASignedRect) * num_clips;
-	cmd = kmalloc(fifo_size, GFP_KERNEL);
-	if (unlikely(cmd == NULL)) {
-		DRM_ERROR("Failed to allocate temporary fifo memory.\n");
-		ret = -ENOMEM;
-		goto out_free_tmp;
-	}
-
-	left = clips->x;
-	right = clips->x + clips->w;
-	top = clips->y;
-	bottom = clips->y + clips->h;
-
-	for (i = 1; i < num_clips; i++) {
-		left = min_t(int, left, (int)clips[i].x);
-		right = max_t(int, right, (int)clips[i].x + clips[i].w);
-		top = min_t(int, top, (int)clips[i].y);
-		bottom = max_t(int, bottom, (int)clips[i].y + clips[i].h);
-	}
-
-	/* only need to do this once */
-	memset(cmd, 0, fifo_size);
-	cmd->header.id = cpu_to_le32(SVGA_3D_CMD_BLIT_SURFACE_TO_SCREEN);
-
-	blits = (SVGASignedRect *)&cmd[1];
-
-	cmd->body.srcRect.left = left;
-	cmd->body.srcRect.right = right;
-	cmd->body.srcRect.top = top;
-	cmd->body.srcRect.bottom = bottom;
-
-	for (i = 0; i < num_clips; i++) {
-		tmp[i].x1 = clips[i].x - left;
-		tmp[i].x2 = clips[i].x + clips[i].w - left;
-		tmp[i].y1 = clips[i].y - top;
-		tmp[i].y2 = clips[i].y + clips[i].h - top;
-	}
-
-	for (k = 0; k < num_units; k++) {
-		struct vmw_display_unit *unit = units[k];
-		struct vmw_clip_rect clip;
-		int num;
-
-		clip.x1 = left + destX - unit->crtc.x;
-		clip.y1 = top + destY - unit->crtc.y;
-		clip.x2 = right + destX - unit->crtc.x;
-		clip.y2 = bottom + destY - unit->crtc.y;
-
-		/* skip any crtcs that misses the clip region */
-		if (clip.x1 >= unit->crtc.mode.hdisplay ||
-		    clip.y1 >= unit->crtc.mode.vdisplay ||
-		    clip.x2 <= 0 || clip.y2 <= 0)
-			continue;
-
-		/*
-		 * In order for the clip rects to be correctly scaled
-		 * the src and dest rects needs to be the same size.
-		 */
-		cmd->body.destRect.left = clip.x1;
-		cmd->body.destRect.right = clip.x2;
-		cmd->body.destRect.top = clip.y1;
-		cmd->body.destRect.bottom = clip.y2;
-
-		/* create a clip rect of the crtc in dest coords */
-		clip.x2 = unit->crtc.mode.hdisplay - clip.x1;
-		clip.y2 = unit->crtc.mode.vdisplay - clip.y1;
-		clip.x1 = 0 - clip.x1;
-		clip.y1 = 0 - clip.y1;
-
-		/* need to reset sid as it is changed by execbuf */
-		cmd->body.srcImage.sid = sid;
-		cmd->body.destScreenId = unit->unit;
-
-		/* clip and write blits to cmd stream */
-		vmw_clip_cliprects(tmp, num_clips, clip, blits, &num);
-
-		/* if no cliprects hit skip this */
-		if (num == 0)
-			continue;
-
-		/* recalculate package length */
-		fifo_size = sizeof(*cmd) + sizeof(SVGASignedRect) * num;
-		cmd->header.size = cpu_to_le32(fifo_size - sizeof(cmd->header));
-		ret = vmw_execbuf_process(file_priv, dev_priv, NULL, cmd,
-					  fifo_size, 0, NULL, NULL);
-
-		if (unlikely(ret != 0))
-			break;
-	}
-
-	kfree(cmd);
-out_free_tmp:
-	kfree(tmp);
-
-	return ret;
-}
-
-int vmw_kms_readback(struct vmw_private *dev_priv,
-		     struct drm_file *file_priv,
-		     struct vmw_framebuffer *vfb,
-		     struct drm_vmw_fence_rep __user *user_fence_rep,
-		     struct drm_vmw_rect *clips,
-		     uint32_t num_clips)
-{
-	struct vmw_framebuffer_dmabuf *vfbd =
-		vmw_framebuffer_to_vfbd(&vfb->base);
-	struct vmw_dma_buffer *dmabuf = vfbd->buffer;
-	struct vmw_display_unit *units[VMWGFX_NUM_DISPLAY_UNITS];
-	struct drm_crtc *crtc;
-	size_t fifo_size;
-	int i, k, ret, num_units, blits_pos;
-
-	struct {
-		uint32_t header;
-		SVGAFifoCmdDefineGMRFB body;
-	} *cmd;
-	struct {
-		uint32_t header;
-		SVGAFifoCmdBlitScreenToGMRFB body;
-	} *blits;
-
-	num_units = 0;
-	list_for_each_entry(crtc, &dev_priv->dev->mode_config.crtc_list, head) {
-		if (crtc->primary->fb != &vfb->base)
-			continue;
-		units[num_units++] = vmw_crtc_to_du(crtc);
-	}
-
-	BUG_ON(dmabuf == NULL);
-	BUG_ON(!clips || !num_clips);
-
-	/* take a safe guess at fifo size */
-	fifo_size = sizeof(*cmd) + sizeof(*blits) * num_clips * num_units;
-	cmd = kmalloc(fifo_size, GFP_KERNEL);
-	if (unlikely(cmd == NULL)) {
-		DRM_ERROR("Failed to allocate temporary fifo memory.\n");
-		return -ENOMEM;
-	}
-
-	memset(cmd, 0, fifo_size);
-	cmd->header = SVGA_CMD_DEFINE_GMRFB;
-	cmd->body.format.bitsPerPixel = vfb->base.bits_per_pixel;
-	cmd->body.format.colorDepth = vfb->base.depth;
-	cmd->body.format.reserved = 0;
-	cmd->body.bytesPerLine = vfb->base.pitches[0];
-	cmd->body.ptr.gmrId = vfb->user_handle;
-	cmd->body.ptr.offset = 0;
-
-	blits = (void *)&cmd[1];
-	blits_pos = 0;
-	for (i = 0; i < num_units; i++) {
-		struct drm_vmw_rect *c = clips;
-		for (k = 0; k < num_clips; k++, c++) {
-			/* transform clip coords to crtc origin based coords */
-			int clip_x1 = c->x - units[i]->crtc.x;
-			int clip_x2 = c->x - units[i]->crtc.x + c->w;
-			int clip_y1 = c->y - units[i]->crtc.y;
-			int clip_y2 = c->y - units[i]->crtc.y + c->h;
-			int dest_x = c->x;
-			int dest_y = c->y;
-
-			/* compensate for clipping, we negate
-			 * a negative number and add that.
-			 */
-			if (clip_x1 < 0)
-				dest_x += -clip_x1;
-			if (clip_y1 < 0)
-				dest_y += -clip_y1;
-
-			/* clip */
-			clip_x1 = max(clip_x1, 0);
-			clip_y1 = max(clip_y1, 0);
-			clip_x2 = min(clip_x2, units[i]->crtc.mode.hdisplay);
-			clip_y2 = min(clip_y2, units[i]->crtc.mode.vdisplay);
-
-			/* and cull any rects that misses the crtc */
-			if (clip_x1 >= units[i]->crtc.mode.hdisplay ||
-			    clip_y1 >= units[i]->crtc.mode.vdisplay ||
-			    clip_x2 <= 0 || clip_y2 <= 0)
-				continue;
-
-			blits[blits_pos].header = SVGA_CMD_BLIT_SCREEN_TO_GMRFB;
-			blits[blits_pos].body.srcScreenId = units[i]->unit;
-			blits[blits_pos].body.destOrigin.x = dest_x;
-			blits[blits_pos].body.destOrigin.y = dest_y;
+	int ret;
 
-			blits[blits_pos].body.srcRect.left = clip_x1;
-			blits[blits_pos].body.srcRect.top = clip_y1;
-			blits[blits_pos].body.srcRect.right = clip_x2;
-			blits[blits_pos].body.srcRect.bottom = clip_y2;
-			blits_pos++;
-		}
+	switch (dev_priv->active_display_unit) {
+	case vmw_du_screen_target:
+		ret = vmw_kms_stdu_surface_dirty(dev_priv, vfb, NULL, clips,
+						 &surface->res, destX, destY,
+						 num_clips, 1, NULL);
+		break;
+	case vmw_du_screen_object:
+		ret = vmw_kms_generic_present(dev_priv, file_priv, vfb, surface,
+					      sid, destX, destY, clips,
+					      num_clips);
+		break;
+	default:
+		WARN_ONCE(true,
+			  "Present called with invalid display system.\n");
+		ret = -ENOSYS;
+		break;
 	}
-	/* reset size here and use calculated exact size from loops */
-	fifo_size = sizeof(*cmd) + sizeof(*blits) * blits_pos;
-
-	ret = vmw_execbuf_process(file_priv, dev_priv, NULL, cmd, fifo_size,
-				  0, user_fence_rep, NULL);
+	if (ret)
+		return ret;
 
-	kfree(cmd);
+	vmw_fifo_flush(dev_priv, false);
 
-	return ret;
+	return 0;
 }
 
 int vmw_kms_init(struct vmw_private *dev_priv)
@@ -1470,30 +1076,37 @@ int vmw_kms_init(struct vmw_private *dev_priv)
 	dev->mode_config.funcs = &vmw_kms_funcs;
 	dev->mode_config.min_width = 1;
 	dev->mode_config.min_height = 1;
-	/* assumed largest fb size */
-	dev->mode_config.max_width = 8192;
-	dev->mode_config.max_height = 8192;
+	dev->mode_config.max_width = dev_priv->texture_max_width;
+	dev->mode_config.max_height = dev_priv->texture_max_height;
 
-	ret = vmw_kms_init_screen_object_display(dev_priv);
-	if (ret) /* Fallback */
-		(void)vmw_kms_init_legacy_display_system(dev_priv);
+	ret = vmw_kms_stdu_init_display(dev_priv);
+	if (ret) {
+		ret = vmw_kms_sou_init_display(dev_priv);
+		if (ret) /* Fallback */
+			ret = vmw_kms_ldu_init_display(dev_priv);
+	}
 
-	return 0;
+	return ret;
 }
 
 int vmw_kms_close(struct vmw_private *dev_priv)
 {
+	int ret;
+
 	/*
 	 * Docs says we should take the lock before calling this function
 	 * but since it destroys encoders and our destructor calls
 	 * drm_encoder_cleanup which takes the lock we deadlock.
 	 */
 	drm_mode_config_cleanup(dev_priv->dev);
-	if (dev_priv->sou_priv)
-		vmw_kms_close_screen_object_display(dev_priv);
+	if (dev_priv->active_display_unit == vmw_du_screen_object)
+		ret = vmw_kms_sou_close_display(dev_priv);
+	else if (dev_priv->active_display_unit == vmw_du_screen_target)
+		ret = vmw_kms_stdu_close_display(dev_priv);
 	else
-		vmw_kms_close_legacy_display_system(dev_priv);
-	return 0;
+		ret = vmw_kms_ldu_close_display(dev_priv);
+
+	return ret;
 }
 
 int vmw_kms_cursor_bypass_ioctl(struct drm_device *dev, void *data,
@@ -1569,7 +1182,7 @@ int vmw_kms_save_vga(struct vmw_private *vmw_priv)
 		  vmw_read(vmw_priv, SVGA_REG_PITCHLOCK);
 	else if (vmw_fifo_have_pitchlock(vmw_priv))
 		vmw_priv->vga_pitchlock = ioread32(vmw_priv->mmio_virt +
-						       SVGA_FIFO_PITCHLOCK);
+						   SVGA_FIFO_PITCHLOCK);
 
 	if (!(vmw_priv->capabilities & SVGA_CAP_DISPLAY_TOPOLOGY))
 		return 0;
@@ -1641,7 +1254,9 @@ bool vmw_kms_validate_mode_vram(struct vmw_private *dev_priv,
 				uint32_t pitch,
 				uint32_t height)
 {
-	return ((u64) pitch * (u64) height) < (u64) dev_priv->prim_bb_mem;
+	return ((u64) pitch * (u64) height) < (u64)
+		((dev_priv->active_display_unit == vmw_du_screen_target) ?
+		 dev_priv->prim_bb_mem : dev_priv->vram_size);
 }
 
 
@@ -1715,75 +1330,6 @@ static int vmw_du_update_layout(struct vmw_private *dev_priv, unsigned num,
 	return 0;
 }
 
-int vmw_du_page_flip(struct drm_crtc *crtc,
-		     struct drm_framebuffer *fb,
-		     struct drm_pending_vblank_event *event,
-		     uint32_t page_flip_flags)
-{
-	struct vmw_private *dev_priv = vmw_priv(crtc->dev);
-	struct drm_framebuffer *old_fb = crtc->primary->fb;
-	struct vmw_framebuffer *vfb = vmw_framebuffer_to_vfb(fb);
-	struct drm_file *file_priv ;
-	struct vmw_fence_obj *fence = NULL;
-	struct drm_clip_rect clips;
-	int ret;
-
-	if (event == NULL)
-		return -EINVAL;
-
-	/* require ScreenObject support for page flipping */
-	if (!dev_priv->sou_priv)
-		return -ENOSYS;
-
-	file_priv = event->base.file_priv;
-	if (!vmw_kms_screen_object_flippable(dev_priv, crtc))
-		return -EINVAL;
-
-	crtc->primary->fb = fb;
-
-	/* do a full screen dirty update */
-	clips.x1 = clips.y1 = 0;
-	clips.x2 = fb->width;
-	clips.y2 = fb->height;
-
-	if (vfb->dmabuf)
-		ret = do_dmabuf_dirty_sou(file_priv, dev_priv, vfb,
-					  0, 0, &clips, 1, 1, &fence);
-	else
-		ret = do_surface_dirty_sou(dev_priv, file_priv, vfb,
-					   0, 0, &clips, 1, 1, &fence);
-
-
-	if (ret != 0)
-		goto out_no_fence;
-	if (!fence) {
-		ret = -EINVAL;
-		goto out_no_fence;
-	}
-
-	ret = vmw_event_fence_action_queue(file_priv, fence,
-					   &event->base,
-					   &event->event.tv_sec,
-					   &event->event.tv_usec,
-					   true);
-
-	/*
-	 * No need to hold on to this now. The only cleanup
-	 * we need to do if we fail is unref the fence.
-	 */
-	vmw_fence_obj_unreference(&fence);
-
-	if (vmw_crtc_to_du(crtc)->is_implicit)
-		vmw_kms_screen_object_update_implicit_fb(dev_priv, crtc);
-
-	return ret;
-
-out_no_fence:
-	crtc->primary->fb = old_fb;
-	return ret;
-}
-
-
 void vmw_du_crtc_save(struct drm_crtc *crtc)
 {
 }
@@ -1920,7 +1466,7 @@ static struct drm_display_mode vmw_kms_connector_builtin[] = {
  * @mode - Pointer to a struct drm_display_mode with hdisplay and vdisplay
  * members filled in.
  */
-static void vmw_guess_mode_timing(struct drm_display_mode *mode)
+void vmw_guess_mode_timing(struct drm_display_mode *mode)
 {
 	mode->hsync_start = mode->hdisplay + 50;
 	mode->hsync_end = mode->hsync_start + 50;
@@ -1955,36 +1501,39 @@ int vmw_du_connector_fill_modes(struct drm_connector *connector,
 	 * If using screen objects, then assume 32-bpp because that's what the
 	 * SVGA device is assuming
 	 */
-	if (dev_priv->sou_priv)
+	if (dev_priv->active_display_unit == vmw_du_screen_object)
 		assumed_bpp = 4;
 
+	if (dev_priv->active_display_unit == vmw_du_screen_target) {
+		max_width  = min(max_width,  dev_priv->stdu_max_width);
+		max_height = min(max_height, dev_priv->stdu_max_height);
+	}
+
 	/* Add preferred mode */
-	{
-		mode = drm_mode_duplicate(dev, &prefmode);
-		if (!mode)
-			return 0;
-		mode->hdisplay = du->pref_width;
-		mode->vdisplay = du->pref_height;
-		vmw_guess_mode_timing(mode);
-
-		if (vmw_kms_validate_mode_vram(dev_priv,
-						mode->hdisplay * assumed_bpp,
-						mode->vdisplay)) {
-			drm_mode_probed_add(connector, mode);
-		} else {
-			drm_mode_destroy(dev, mode);
-			mode = NULL;
-		}
+	mode = drm_mode_duplicate(dev, &prefmode);
+	if (!mode)
+		return 0;
+	mode->hdisplay = du->pref_width;
+	mode->vdisplay = du->pref_height;
+	vmw_guess_mode_timing(mode);
 
-		if (du->pref_mode) {
-			list_del_init(&du->pref_mode->head);
-			drm_mode_destroy(dev, du->pref_mode);
-		}
+	if (vmw_kms_validate_mode_vram(dev_priv,
+					mode->hdisplay * assumed_bpp,
+					mode->vdisplay)) {
+		drm_mode_probed_add(connector, mode);
+	} else {
+		drm_mode_destroy(dev, mode);
+		mode = NULL;
+	}
 
-		/* mode might be null here, this is intended */
-		du->pref_mode = mode;
+	if (du->pref_mode) {
+		list_del_init(&du->pref_mode->head);
+		drm_mode_destroy(dev, du->pref_mode);
 	}
 
+	/* mode might be null here, this is intended */
+	du->pref_mode = mode;
+
 	for (i = 0; vmw_kms_connector_builtin[i].type != 0; i++) {
 		bmode = &vmw_kms_connector_builtin[i];
 		if (bmode->hdisplay > max_width ||
@@ -2004,11 +1553,9 @@ int vmw_du_connector_fill_modes(struct drm_connector *connector,
 		drm_mode_probed_add(connector, mode);
 	}
 
-	/* Move the prefered mode first, help apps pick the right mode. */
-	if (du->pref_mode)
-		list_move(&du->pref_mode->head, &connector->probed_modes);
-
 	drm_mode_connector_list_update(connector, true);
+	/* Move the prefered mode first, help apps pick the right mode. */
+	drm_mode_sort(&connector->modes);
 
 	return 1;
 }
@@ -2032,7 +1579,9 @@ int vmw_kms_update_layout_ioctl(struct drm_device *dev, void *data,
 	unsigned rects_size;
 	int ret;
 	int i;
+	u64 total_pixels = 0;
 	struct drm_mode_config *mode_config = &dev->mode_config;
+	struct drm_vmw_rect bounding_box = {0};
 
 	if (!arg->num_outputs) {
 		struct drm_vmw_rect def_rect = {0, 0, 800, 600};
@@ -2063,6 +1612,40 @@ int vmw_kms_update_layout_ioctl(struct drm_device *dev, void *data,
 			ret = -EINVAL;
 			goto out_free;
 		}
+
+		/*
+		 * bounding_box.w and bunding_box.h are used as
+		 * lower-right coordinates
+		 */
+		if (rects[i].x + rects[i].w > bounding_box.w)
+			bounding_box.w = rects[i].x + rects[i].w;
+
+		if (rects[i].y + rects[i].h > bounding_box.h)
+			bounding_box.h = rects[i].y + rects[i].h;
+
+		total_pixels += (u64) rects[i].w * (u64) rects[i].h;
+	}
+
+	if (dev_priv->active_display_unit == vmw_du_screen_target) {
+		/*
+		 * For Screen Targets, the limits for a toplogy are:
+		 *	1. Bounding box (assuming 32bpp) must be < prim_bb_mem
+		 *      2. Total pixels (assuming 32bpp) must be < prim_bb_mem
+		 */
+		u64 bb_mem    = bounding_box.w * bounding_box.h * 4;
+		u64 pixel_mem = total_pixels * 4;
+
+		if (bb_mem > dev_priv->prim_bb_mem) {
+			DRM_ERROR("Topology is beyond supported limits.\n");
+			ret = -EINVAL;
+			goto out_free;
+		}
+
+		if (pixel_mem > dev_priv->prim_bb_mem) {
+			DRM_ERROR("Combined output size too large\n");
+			ret = -EINVAL;
+			goto out_free;
+		}
 	}
 
 	vmw_du_update_layout(dev_priv, arg->num_outputs, rects);
@@ -2071,3 +1654,419 @@ out_free:
 	kfree(rects);
 	return ret;
 }
+
+/**
+ * vmw_kms_helper_dirty - Helper to build commands and perform actions based
+ * on a set of cliprects and a set of display units.
+ *
+ * @dev_priv: Pointer to a device private structure.
+ * @framebuffer: Pointer to the framebuffer on which to perform the actions.
+ * @clips: A set of struct drm_clip_rect. Either this os @vclips must be NULL.
+ * Cliprects are given in framebuffer coordinates.
+ * @vclips: A set of struct drm_vmw_rect cliprects. Either this or @clips must
+ * be NULL. Cliprects are given in source coordinates.
+ * @dest_x: X coordinate offset for the crtc / destination clip rects.
+ * @dest_y: Y coordinate offset for the crtc / destination clip rects.
+ * @num_clips: Number of cliprects in the @clips or @vclips array.
+ * @increment: Integer with which to increment the clip counter when looping.
+ * Used to skip a predetermined number of clip rects.
+ * @dirty: Closure structure. See the description of struct vmw_kms_dirty.
+ */
+int vmw_kms_helper_dirty(struct vmw_private *dev_priv,
+			 struct vmw_framebuffer *framebuffer,
+			 const struct drm_clip_rect *clips,
+			 const struct drm_vmw_rect *vclips,
+			 s32 dest_x, s32 dest_y,
+			 int num_clips,
+			 int increment,
+			 struct vmw_kms_dirty *dirty)
+{
+	struct vmw_display_unit *units[VMWGFX_NUM_DISPLAY_UNITS];
+	struct drm_crtc *crtc;
+	u32 num_units = 0;
+	u32 i, k;
+	int ret;
+
+	dirty->dev_priv = dev_priv;
+
+	list_for_each_entry(crtc, &dev_priv->dev->mode_config.crtc_list, head) {
+		if (crtc->primary->fb != &framebuffer->base)
+			continue;
+		units[num_units++] = vmw_crtc_to_du(crtc);
+	}
+
+	for (k = 0; k < num_units; k++) {
+		struct vmw_display_unit *unit = units[k];
+		s32 crtc_x = unit->crtc.x;
+		s32 crtc_y = unit->crtc.y;
+		s32 crtc_width = unit->crtc.mode.hdisplay;
+		s32 crtc_height = unit->crtc.mode.vdisplay;
+		const struct drm_clip_rect *clips_ptr = clips;
+		const struct drm_vmw_rect *vclips_ptr = vclips;
+
+		dirty->unit = unit;
+		if (dirty->fifo_reserve_size > 0) {
+			dirty->cmd = vmw_fifo_reserve(dev_priv,
+						      dirty->fifo_reserve_size);
+			if (!dirty->cmd) {
+				DRM_ERROR("Couldn't reserve fifo space "
+					  "for dirty blits.\n");
+				return ret;
+			}
+			memset(dirty->cmd, 0, dirty->fifo_reserve_size);
+		}
+		dirty->num_hits = 0;
+		for (i = 0; i < num_clips; i++, clips_ptr += increment,
+		       vclips_ptr += increment) {
+			s32 clip_left;
+			s32 clip_top;
+
+			/*
+			 * Select clip array type. Note that integer type
+			 * in @clips is unsigned short, whereas in @vclips
+			 * it's 32-bit.
+			 */
+			if (clips) {
+				dirty->fb_x = (s32) clips_ptr->x1;
+				dirty->fb_y = (s32) clips_ptr->y1;
+				dirty->unit_x2 = (s32) clips_ptr->x2 + dest_x -
+					crtc_x;
+				dirty->unit_y2 = (s32) clips_ptr->y2 + dest_y -
+					crtc_y;
+			} else {
+				dirty->fb_x = vclips_ptr->x;
+				dirty->fb_y = vclips_ptr->y;
+				dirty->unit_x2 = dirty->fb_x + vclips_ptr->w +
+					dest_x - crtc_x;
+				dirty->unit_y2 = dirty->fb_y + vclips_ptr->h +
+					dest_y - crtc_y;
+			}
+
+			dirty->unit_x1 = dirty->fb_x + dest_x - crtc_x;
+			dirty->unit_y1 = dirty->fb_y + dest_y - crtc_y;
+
+			/* Skip this clip if it's outside the crtc region */
+			if (dirty->unit_x1 >= crtc_width ||
+			    dirty->unit_y1 >= crtc_height ||
+			    dirty->unit_x2 <= 0 || dirty->unit_y2 <= 0)
+				continue;
+
+			/* Clip right and bottom to crtc limits */
+			dirty->unit_x2 = min_t(s32, dirty->unit_x2,
+					       crtc_width);
+			dirty->unit_y2 = min_t(s32, dirty->unit_y2,
+					       crtc_height);
+
+			/* Clip left and top to crtc limits */
+			clip_left = min_t(s32, dirty->unit_x1, 0);
+			clip_top = min_t(s32, dirty->unit_y1, 0);
+			dirty->unit_x1 -= clip_left;
+			dirty->unit_y1 -= clip_top;
+			dirty->fb_x -= clip_left;
+			dirty->fb_y -= clip_top;
+
+			dirty->clip(dirty);
+		}
+
+		dirty->fifo_commit(dirty);
+	}
+
+	return 0;
+}
+
+/**
+ * vmw_kms_helper_buffer_prepare - Reserve and validate a buffer object before
+ * command submission.
+ *
+ * @dev_priv. Pointer to a device private structure.
+ * @buf: The buffer object
+ * @interruptible: Whether to perform waits as interruptible.
+ * @validate_as_mob: Whether the buffer should be validated as a MOB. If false,
+ * The buffer will be validated as a GMR. Already pinned buffers will not be
+ * validated.
+ *
+ * Returns 0 on success, negative error code on failure, -ERESTARTSYS if
+ * interrupted by a signal.
+ */
+int vmw_kms_helper_buffer_prepare(struct vmw_private *dev_priv,
+				  struct vmw_dma_buffer *buf,
+				  bool interruptible,
+				  bool validate_as_mob)
+{
+	struct ttm_buffer_object *bo = &buf->base;
+	int ret;
+
+	ttm_bo_reserve(bo, false, false, interruptible, NULL);
+	ret = vmw_validate_single_buffer(dev_priv, bo, interruptible,
+					 validate_as_mob);
+	if (ret)
+		ttm_bo_unreserve(bo);
+
+	return ret;
+}
+
+/**
+ * vmw_kms_helper_buffer_revert - Undo the actions of
+ * vmw_kms_helper_buffer_prepare.
+ *
+ * @res: Pointer to the buffer object.
+ *
+ * Helper to be used if an error forces the caller to undo the actions of
+ * vmw_kms_helper_buffer_prepare.
+ */
+void vmw_kms_helper_buffer_revert(struct vmw_dma_buffer *buf)
+{
+	if (buf)
+		ttm_bo_unreserve(&buf->base);
+}
+
+/**
+ * vmw_kms_helper_buffer_finish - Unreserve and fence a buffer object after
+ * kms command submission.
+ *
+ * @dev_priv: Pointer to a device private structure.
+ * @file_priv: Pointer to a struct drm_file representing the caller's
+ * connection. Must be set to NULL if @user_fence_rep is NULL, and conversely
+ * if non-NULL, @user_fence_rep must be non-NULL.
+ * @buf: The buffer object.
+ * @out_fence:  Optional pointer to a fence pointer. If non-NULL, a
+ * ref-counted fence pointer is returned here.
+ * @user_fence_rep: Optional pointer to a user-space provided struct
+ * drm_vmw_fence_rep. If provided, @file_priv must also be provided and the
+ * function copies fence data to user-space in a fail-safe manner.
+ */
+void vmw_kms_helper_buffer_finish(struct vmw_private *dev_priv,
+				  struct drm_file *file_priv,
+				  struct vmw_dma_buffer *buf,
+				  struct vmw_fence_obj **out_fence,
+				  struct drm_vmw_fence_rep __user *
+				  user_fence_rep)
+{
+	struct vmw_fence_obj *fence;
+	uint32_t handle;
+	int ret;
+
+	ret = vmw_execbuf_fence_commands(file_priv, dev_priv, &fence,
+					 file_priv ? &handle : NULL);
+	if (buf)
+		vmw_fence_single_bo(&buf->base, fence);
+	if (file_priv)
+		vmw_execbuf_copy_fence_user(dev_priv, vmw_fpriv(file_priv),
+					    ret, user_fence_rep, fence,
+					    handle);
+	if (out_fence)
+		*out_fence = fence;
+	else
+		vmw_fence_obj_unreference(&fence);
+
+	vmw_kms_helper_buffer_revert(buf);
+}
+
+
+/**
+ * vmw_kms_helper_resource_revert - Undo the actions of
+ * vmw_kms_helper_resource_prepare.
+ *
+ * @res: Pointer to the resource. Typically a surface.
+ *
+ * Helper to be used if an error forces the caller to undo the actions of
+ * vmw_kms_helper_resource_prepare.
+ */
+void vmw_kms_helper_resource_revert(struct vmw_resource *res)
+{
+	vmw_kms_helper_buffer_revert(res->backup);
+	vmw_resource_unreserve(res, false, NULL, 0);
+	mutex_unlock(&res->dev_priv->cmdbuf_mutex);
+}
+
+/**
+ * vmw_kms_helper_resource_prepare - Reserve and validate a resource before
+ * command submission.
+ *
+ * @res: Pointer to the resource. Typically a surface.
+ * @interruptible: Whether to perform waits as interruptible.
+ *
+ * Reserves and validates also the backup buffer if a guest-backed resource.
+ * Returns 0 on success, negative error code on failure. -ERESTARTSYS if
+ * interrupted by a signal.
+ */
+int vmw_kms_helper_resource_prepare(struct vmw_resource *res,
+				    bool interruptible)
+{
+	int ret = 0;
+
+	if (interruptible)
+		ret = mutex_lock_interruptible(&res->dev_priv->cmdbuf_mutex);
+	else
+		mutex_lock(&res->dev_priv->cmdbuf_mutex);
+
+	if (unlikely(ret != 0))
+		return -ERESTARTSYS;
+
+	ret = vmw_resource_reserve(res, interruptible, false);
+	if (ret)
+		goto out_unlock;
+
+	if (res->backup) {
+		ret = vmw_kms_helper_buffer_prepare(res->dev_priv, res->backup,
+						    interruptible,
+						    res->dev_priv->has_mob);
+		if (ret)
+			goto out_unreserve;
+	}
+	ret = vmw_resource_validate(res);
+	if (ret)
+		goto out_revert;
+	return 0;
+
+out_revert:
+	vmw_kms_helper_buffer_revert(res->backup);
+out_unreserve:
+	vmw_resource_unreserve(res, false, NULL, 0);
+out_unlock:
+	mutex_unlock(&res->dev_priv->cmdbuf_mutex);
+	return ret;
+}
+
+/**
+ * vmw_kms_helper_resource_finish - Unreserve and fence a resource after
+ * kms command submission.
+ *
+ * @res: Pointer to the resource. Typically a surface.
+ * @out_fence: Optional pointer to a fence pointer. If non-NULL, a
+ * ref-counted fence pointer is returned here.
+ */
+void vmw_kms_helper_resource_finish(struct vmw_resource *res,
+			     struct vmw_fence_obj **out_fence)
+{
+	if (res->backup || out_fence)
+		vmw_kms_helper_buffer_finish(res->dev_priv, NULL, res->backup,
+					     out_fence, NULL);
+
+	vmw_resource_unreserve(res, false, NULL, 0);
+	mutex_unlock(&res->dev_priv->cmdbuf_mutex);
+}
+
+/**
+ * vmw_kms_update_proxy - Helper function to update a proxy surface from
+ * its backing MOB.
+ *
+ * @res: Pointer to the surface resource
+ * @clips: Clip rects in framebuffer (surface) space.
+ * @num_clips: Number of clips in @clips.
+ * @increment: Integer with which to increment the clip counter when looping.
+ * Used to skip a predetermined number of clip rects.
+ *
+ * This function makes sure the proxy surface is updated from its backing MOB
+ * using the region given by @clips. The surface resource @res and its backing
+ * MOB needs to be reserved and validated on call.
+ */
+int vmw_kms_update_proxy(struct vmw_resource *res,
+			 const struct drm_clip_rect *clips,
+			 unsigned num_clips,
+			 int increment)
+{
+	struct vmw_private *dev_priv = res->dev_priv;
+	struct drm_vmw_size *size = &vmw_res_to_srf(res)->base_size;
+	struct {
+		SVGA3dCmdHeader header;
+		SVGA3dCmdUpdateGBImage body;
+	} *cmd;
+	SVGA3dBox *box;
+	size_t copy_size = 0;
+	int i;
+
+	if (!clips)
+		return 0;
+
+	cmd = vmw_fifo_reserve(dev_priv, sizeof(*cmd) * num_clips);
+	if (!cmd) {
+		DRM_ERROR("Couldn't reserve fifo space for proxy surface "
+			  "update.\n");
+		return -ENOMEM;
+	}
+
+	for (i = 0; i < num_clips; ++i, clips += increment, ++cmd) {
+		box = &cmd->body.box;
+
+		cmd->header.id = SVGA_3D_CMD_UPDATE_GB_IMAGE;
+		cmd->header.size = sizeof(cmd->body);
+		cmd->body.image.sid = res->id;
+		cmd->body.image.face = 0;
+		cmd->body.image.mipmap = 0;
+
+		if (clips->x1 > size->width || clips->x2 > size->width ||
+		    clips->y1 > size->height || clips->y2 > size->height) {
+			DRM_ERROR("Invalid clips outsize of framebuffer.\n");
+			return -EINVAL;
+		}
+
+		box->x = clips->x1;
+		box->y = clips->y1;
+		box->z = 0;
+		box->w = clips->x2 - clips->x1;
+		box->h = clips->y2 - clips->y1;
+		box->d = 1;
+
+		copy_size += sizeof(*cmd);
+	}
+
+	vmw_fifo_commit(dev_priv, copy_size);
+
+	return 0;
+}
+
+int vmw_kms_fbdev_init_data(struct vmw_private *dev_priv,
+			    unsigned unit,
+			    u32 max_width,
+			    u32 max_height,
+			    struct drm_connector **p_con,
+			    struct drm_crtc **p_crtc,
+			    struct drm_display_mode **p_mode)
+{
+	struct drm_connector *con;
+	struct vmw_display_unit *du;
+	struct drm_display_mode *mode;
+	int i = 0;
+
+	list_for_each_entry(con, &dev_priv->dev->mode_config.connector_list,
+			    head) {
+		if (i == unit)
+			break;
+
+		++i;
+	}
+
+	if (i != unit) {
+		DRM_ERROR("Could not find initial display unit.\n");
+		return -EINVAL;
+	}
+
+	if (list_empty(&con->modes))
+		(void) vmw_du_connector_fill_modes(con, max_width, max_height);
+
+	if (list_empty(&con->modes)) {
+		DRM_ERROR("Could not find initial display mode.\n");
+		return -EINVAL;
+	}
+
+	du = vmw_connector_to_du(con);
+	*p_con = con;
+	*p_crtc = &du->crtc;
+
+	list_for_each_entry(mode, &con->modes, head) {
+		if (mode->type & DRM_MODE_TYPE_PREFERRED)
+			break;
+	}
+
+	if (mode->type & DRM_MODE_TYPE_PREFERRED)
+		*p_mode = mode;
+	else {
+		WARN_ONCE(true, "Could not find initial preferred mode.\n");
+		*p_mode = list_first_entry(&con->modes,
+					   struct drm_display_mode,
+					   head);
+	}
+
+	return 0;
+}