These changes are the raw update to linux-4.4.6-rt14. Kernel sources

are taken from kernel.org, and rt patch from the rt wiki download page.

During the rebasing, the following patch collided:

Force tick interrupt and get rid of softirq magic(I70131fb85).

Collisions have been removed because its logic was found on the
source already.

Change-Id: I7f57a4081d9deaa0d9ccfc41a6c8daccdee3b769
Signed-off-by: José Pekkarinen <jose.pekkarinen@nokia.com>

1 files changed, 1268 insertions, 0 deletions

diff --git a/kernel/drivers/gpu/drm/vmwgfx/vmwgfx_stdu.c b/kernel/drivers/gpu/drm/vmwgfx/vmwgfx_stdu.c
new file mode 100644
index 000000000..f823fc3ef
--- /dev/null
+++ b/kernel/drivers/gpu/drm/vmwgfx/vmwgfx_stdu.c
@@ -0,0 +1,1268 @@
+/******************************************************************************
+ *
+ * COPYRIGHT © 2014-2015 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.
+ *
+ ******************************************************************************/
+
+#include "vmwgfx_kms.h"
+#include "device_include/svga3d_surfacedefs.h"
+#include <drm/drm_plane_helper.h>
+
+#define vmw_crtc_to_stdu(x) \
+	container_of(x, struct vmw_screen_target_display_unit, base.crtc)
+#define vmw_encoder_to_stdu(x) \
+	container_of(x, struct vmw_screen_target_display_unit, base.encoder)
+#define vmw_connector_to_stdu(x) \
+	container_of(x, struct vmw_screen_target_display_unit, base.connector)
+
+
+
+enum stdu_content_type {
+	SAME_AS_DISPLAY = 0,
+	SEPARATE_SURFACE,
+	SEPARATE_DMA
+};
+
+/**
+ * struct vmw_stdu_dirty - closure structure for the update functions
+ *
+ * @base: The base type we derive from. Used by vmw_kms_helper_dirty().
+ * @transfer: Transfer direction for DMA command.
+ * @left: Left side of bounding box.
+ * @right: Right side of bounding box.
+ * @top: Top side of bounding box.
+ * @bottom: Bottom side of bounding box.
+ * @buf: DMA buffer when DMA-ing between buffer and screen targets.
+ * @sid: Surface ID when copying between surface and screen targets.
+ */
+struct vmw_stdu_dirty {
+	struct vmw_kms_dirty base;
+	SVGA3dTransferType  transfer;
+	s32 left, right, top, bottom;
+	u32 pitch;
+	union {
+		struct vmw_dma_buffer *buf;
+		u32 sid;
+	};
+};
+
+/*
+ * SVGA commands that are used by this code. Please see the device headers
+ * for explanation.
+ */
+struct vmw_stdu_update {
+	SVGA3dCmdHeader header;
+	SVGA3dCmdUpdateGBScreenTarget body;
+};
+
+struct vmw_stdu_dma {
+	SVGA3dCmdHeader     header;
+	SVGA3dCmdSurfaceDMA body;
+};
+
+struct vmw_stdu_surface_copy {
+	SVGA3dCmdHeader      header;
+	SVGA3dCmdSurfaceCopy body;
+};
+
+
+/**
+ * struct vmw_screen_target_display_unit
+ *
+ * @base: VMW specific DU structure
+ * @display_srf: surface to be displayed.  The dimension of this will always
+ *               match the display mode.  If the display mode matches
+ *               content_vfbs dimensions, then this is a pointer into the
+ *               corresponding field in content_vfbs.  If not, then this
+ *               is a separate buffer to which content_vfbs will blit to.
+ * @content_fb: holds the rendered content, can be a surface or DMA buffer
+ * @content_type:  content_fb type
+ * @defined:  true if the current display unit has been initialized
+ */
+struct vmw_screen_target_display_unit {
+	struct vmw_display_unit base;
+
+	struct vmw_surface     *display_srf;
+	struct drm_framebuffer *content_fb;
+
+	enum stdu_content_type content_fb_type;
+
+	bool defined;
+};
+
+
+
+static void vmw_stdu_destroy(struct vmw_screen_target_display_unit *stdu);
+
+
+
+/******************************************************************************
+ * Screen Target Display Unit helper Functions
+ *****************************************************************************/
+
+/**
+ * vmw_stdu_pin_display - pins the resource associated with the display surface
+ *
+ * @stdu: contains the display surface
+ *
+ * Since the display surface can either be a private surface allocated by us,
+ * or it can point to the content surface, we use this function to not pin the
+ * same resource twice.
+ */
+static int vmw_stdu_pin_display(struct vmw_screen_target_display_unit *stdu)
+{
+	return vmw_resource_pin(&stdu->display_srf->res, false);
+}
+
+
+
+/**
+ * vmw_stdu_unpin_display - unpins the resource associated with display surface
+ *
+ * @stdu: contains the display surface
+ *
+ * If the display surface was privatedly allocated by
+ * vmw_surface_gb_priv_define() and not registered as a framebuffer, then it
+ * won't be automatically cleaned up when all the framebuffers are freed.  As
+ * such, we have to explicitly call vmw_resource_unreference() to get it freed.
+ */
+static void vmw_stdu_unpin_display(struct vmw_screen_target_display_unit *stdu)
+{
+	if (stdu->display_srf) {
+		struct vmw_resource *res = &stdu->display_srf->res;
+
+		vmw_resource_unpin(res);
+
+		if (stdu->content_fb_type != SAME_AS_DISPLAY) {
+			vmw_resource_unreference(&res);
+			stdu->content_fb_type = SAME_AS_DISPLAY;
+		}
+
+		stdu->display_srf = NULL;
+	}
+}
+
+
+
+/******************************************************************************
+ * Screen Target Display Unit CRTC Functions
+ *****************************************************************************/
+
+
+/**
+ * vmw_stdu_crtc_destroy - cleans up the STDU
+ *
+ * @crtc: used to get a reference to the containing STDU
+ */
+static void vmw_stdu_crtc_destroy(struct drm_crtc *crtc)
+{
+	vmw_stdu_destroy(vmw_crtc_to_stdu(crtc));
+}
+
+/**
+ * vmw_stdu_define_st - Defines a Screen Target
+ *
+ * @dev_priv:  VMW DRM device
+ * @stdu: display unit to create a Screen Target for
+ *
+ * Creates a STDU that we can used later.  This function is called whenever the
+ * framebuffer size changes.
+ *
+ * RETURNs:
+ * 0 on success, error code on failure
+ */
+static int vmw_stdu_define_st(struct vmw_private *dev_priv,
+			      struct vmw_screen_target_display_unit *stdu)
+{
+	struct {
+		SVGA3dCmdHeader header;
+		SVGA3dCmdDefineGBScreenTarget body;
+	} *cmd;
+
+	cmd = vmw_fifo_reserve(dev_priv, sizeof(*cmd));
+
+	if (unlikely(cmd == NULL)) {
+		DRM_ERROR("Out of FIFO space defining Screen Target\n");
+		return -ENOMEM;
+	}
+
+	cmd->header.id   = SVGA_3D_CMD_DEFINE_GB_SCREENTARGET;
+	cmd->header.size = sizeof(cmd->body);
+
+	cmd->body.stid   = stdu->base.unit;
+	cmd->body.width  = stdu->display_srf->base_size.width;
+	cmd->body.height = stdu->display_srf->base_size.height;
+	cmd->body.flags  = (0 == cmd->body.stid) ? SVGA_STFLAG_PRIMARY : 0;
+	cmd->body.dpi    = 0;
+	cmd->body.xRoot  = stdu->base.crtc.x;
+	cmd->body.yRoot  = stdu->base.crtc.y;
+
+	if (!stdu->base.is_implicit) {
+		cmd->body.xRoot  = stdu->base.gui_x;
+		cmd->body.yRoot  = stdu->base.gui_y;
+	}
+
+	vmw_fifo_commit(dev_priv, sizeof(*cmd));
+
+	stdu->defined = true;
+
+	return 0;
+}
+
+
+
+/**
+ * vmw_stdu_bind_st - Binds a surface to a Screen Target
+ *
+ * @dev_priv: VMW DRM device
+ * @stdu: display unit affected
+ * @res: Buffer to bind to the screen target.  Set to NULL to blank screen.
+ *
+ * Binding a surface to a Screen Target the same as flipping
+ */
+static int vmw_stdu_bind_st(struct vmw_private *dev_priv,
+			    struct vmw_screen_target_display_unit *stdu,
+			    struct vmw_resource *res)
+{
+	SVGA3dSurfaceImageId image;
+
+	struct {
+		SVGA3dCmdHeader header;
+		SVGA3dCmdBindGBScreenTarget body;
+	} *cmd;
+
+
+	if (!stdu->defined) {
+		DRM_ERROR("No screen target defined\n");
+		return -EINVAL;
+	}
+
+	/* Set up image using information in vfb */
+	memset(&image, 0, sizeof(image));
+	image.sid = res ? res->id : SVGA3D_INVALID_ID;
+
+	cmd = vmw_fifo_reserve(dev_priv, sizeof(*cmd));
+
+	if (unlikely(cmd == NULL)) {
+		DRM_ERROR("Out of FIFO space binding a screen target\n");
+		return -ENOMEM;
+	}
+
+	cmd->header.id   = SVGA_3D_CMD_BIND_GB_SCREENTARGET;
+	cmd->header.size = sizeof(cmd->body);
+
+	cmd->body.stid   = stdu->base.unit;
+	cmd->body.image  = image;
+
+	vmw_fifo_commit(dev_priv, sizeof(*cmd));
+
+	return 0;
+}
+
+/**
+ * vmw_stdu_populate_update - populate an UPDATE_GB_SCREENTARGET command with a
+ * bounding box.
+ *
+ * @cmd: Pointer to command stream.
+ * @unit: Screen target unit.
+ * @left: Left side of bounding box.
+ * @right: Right side of bounding box.
+ * @top: Top side of bounding box.
+ * @bottom: Bottom side of bounding box.
+ */
+static void vmw_stdu_populate_update(void *cmd, int unit,
+				     s32 left, s32 right, s32 top, s32 bottom)
+{
+	struct vmw_stdu_update *update = cmd;
+
+	update->header.id   = SVGA_3D_CMD_UPDATE_GB_SCREENTARGET;
+	update->header.size = sizeof(update->body);
+
+	update->body.stid   = unit;
+	update->body.rect.x = left;
+	update->body.rect.y = top;
+	update->body.rect.w = right - left;
+	update->body.rect.h = bottom - top;
+}
+
+/**
+ * vmw_stdu_update_st - Full update of a Screen Target
+ *
+ * @dev_priv: VMW DRM device
+ * @stdu: display unit affected
+ *
+ * This function needs to be called whenever the content of a screen
+ * target has changed completely. Typically as a result of a backing
+ * surface change.
+ *
+ * RETURNS:
+ * 0 on success, error code on failure
+ */
+static int vmw_stdu_update_st(struct vmw_private *dev_priv,
+			      struct vmw_screen_target_display_unit *stdu)
+{
+	struct vmw_stdu_update *cmd;
+	struct drm_crtc *crtc = &stdu->base.crtc;
+
+	if (!stdu->defined) {
+		DRM_ERROR("No screen target defined");
+		return -EINVAL;
+	}
+
+	cmd = vmw_fifo_reserve(dev_priv, sizeof(*cmd));
+
+	if (unlikely(cmd == NULL)) {
+		DRM_ERROR("Out of FIFO space updating a Screen Target\n");
+		return -ENOMEM;
+	}
+
+	vmw_stdu_populate_update(cmd, stdu->base.unit, 0, crtc->mode.hdisplay,
+				 0, crtc->mode.vdisplay);
+
+	vmw_fifo_commit(dev_priv, sizeof(*cmd));
+
+	return 0;
+}
+
+
+
+/**
+ * vmw_stdu_destroy_st - Destroy a Screen Target
+ *
+ * @dev_priv:  VMW DRM device
+ * @stdu: display unit to destroy
+ */
+static int vmw_stdu_destroy_st(struct vmw_private *dev_priv,
+			       struct vmw_screen_target_display_unit *stdu)
+{
+	int    ret;
+
+	struct {
+		SVGA3dCmdHeader header;
+		SVGA3dCmdDestroyGBScreenTarget body;
+	} *cmd;
+
+
+	/* Nothing to do if not successfully defined */
+	if (unlikely(!stdu->defined))
+		return 0;
+
+	cmd = vmw_fifo_reserve(dev_priv, sizeof(*cmd));
+
+	if (unlikely(cmd == NULL)) {
+		DRM_ERROR("Out of FIFO space, screen target not destroyed\n");
+		return -ENOMEM;
+	}
+
+	cmd->header.id   = SVGA_3D_CMD_DESTROY_GB_SCREENTARGET;
+	cmd->header.size = sizeof(cmd->body);
+
+	cmd->body.stid   = stdu->base.unit;
+
+	vmw_fifo_commit(dev_priv, sizeof(*cmd));
+
+	/* Force sync */
+	ret = vmw_fallback_wait(dev_priv, false, true, 0, false, 3*HZ);
+	if (unlikely(ret != 0))
+		DRM_ERROR("Failed to sync with HW");
+
+	stdu->defined = false;
+
+	return ret;
+}
+
+
+
+/**
+ * vmw_stdu_crtc_set_config - Sets a mode
+ *
+ * @set:  mode parameters
+ *
+ * This function is the device-specific portion of the DRM CRTC mode set.
+ * For the SVGA device, we do this by defining a Screen Target, binding a
+ * GB Surface to that target, and finally update the screen target.
+ *
+ * RETURNS:
+ * 0 on success, error code otherwise
+ */
+static int vmw_stdu_crtc_set_config(struct drm_mode_set *set)
+{
+	struct vmw_private *dev_priv;
+	struct vmw_screen_target_display_unit *stdu;
+	struct vmw_framebuffer *vfb;
+	struct vmw_framebuffer_surface *new_vfbs;
+	struct drm_display_mode *mode;
+	struct drm_framebuffer  *new_fb;
+	struct drm_crtc      *crtc;
+	struct drm_encoder   *encoder;
+	struct drm_connector *connector;
+	int    ret;
+
+
+	if (!set || !set->crtc)
+		return -EINVAL;
+
+	crtc     = set->crtc;
+	crtc->x  = set->x;
+	crtc->y  = set->y;
+	stdu     = vmw_crtc_to_stdu(crtc);
+	mode     = set->mode;
+	new_fb   = set->fb;
+	dev_priv = vmw_priv(crtc->dev);
+
+
+	if (set->num_connectors > 1) {
+		DRM_ERROR("Too many connectors\n");
+		return -EINVAL;
+	}
+
+	if (set->num_connectors == 1 &&
+	    set->connectors[0] != &stdu->base.connector) {
+		DRM_ERROR("Connectors don't match %p %p\n",
+			set->connectors[0], &stdu->base.connector);
+		return -EINVAL;
+	}
+
+
+	/* Since they always map one to one these are safe */
+	connector = &stdu->base.connector;
+	encoder   = &stdu->base.encoder;
+
+
+	/*
+	 * After this point the CRTC will be considered off unless a new fb
+	 * is bound
+	 */
+	if (stdu->defined) {
+		/* Unbind current surface by binding an invalid one */
+		ret = vmw_stdu_bind_st(dev_priv, stdu, NULL);
+		if (unlikely(ret != 0))
+			return ret;
+
+		/* Update Screen Target, display will now be blank */
+		if (crtc->primary->fb) {
+			vmw_stdu_update_st(dev_priv, stdu);
+			if (unlikely(ret != 0))
+				return ret;
+		}
+
+		crtc->primary->fb  = NULL;
+		crtc->enabled      = false;
+		encoder->crtc      = NULL;
+		connector->encoder = NULL;
+
+		vmw_stdu_unpin_display(stdu);
+		stdu->content_fb      = NULL;
+		stdu->content_fb_type = SAME_AS_DISPLAY;
+
+		ret = vmw_stdu_destroy_st(dev_priv, stdu);
+		/* The hardware is hung, give up */
+		if (unlikely(ret != 0))
+			return ret;
+	}
+
+
+	/* Any of these conditions means the caller wants CRTC off */
+	if (set->num_connectors == 0 || !mode || !new_fb)
+		return 0;
+
+
+	if (set->x + mode->hdisplay > new_fb->width ||
+	    set->y + mode->vdisplay > new_fb->height) {
+		DRM_ERROR("Set outside of framebuffer\n");
+		return -EINVAL;
+	}
+
+	stdu->content_fb = new_fb;
+	vfb = vmw_framebuffer_to_vfb(stdu->content_fb);
+
+	if (vfb->dmabuf)
+		stdu->content_fb_type = SEPARATE_DMA;
+
+	/*
+	 * If the requested mode is different than the width and height
+	 * of the FB or if the content buffer is a DMA buf, then allocate
+	 * a display FB that matches the dimension of the mode
+	 */
+	if (mode->hdisplay != new_fb->width  ||
+	    mode->vdisplay != new_fb->height ||
+	    stdu->content_fb_type != SAME_AS_DISPLAY) {
+		struct vmw_surface content_srf;
+		struct drm_vmw_size display_base_size = {0};
+		struct vmw_surface *display_srf;
+
+
+		display_base_size.width  = mode->hdisplay;
+		display_base_size.height = mode->vdisplay;
+		display_base_size.depth  = 1;
+
+		/*
+		 * If content buffer is a DMA buf, then we have to construct
+		 * surface info
+		 */
+		if (stdu->content_fb_type == SEPARATE_DMA) {
+
+			switch (new_fb->bits_per_pixel) {
+			case 32:
+				content_srf.format = SVGA3D_X8R8G8B8;
+				break;
+
+			case 16:
+				content_srf.format = SVGA3D_R5G6B5;
+				break;
+
+			case 8:
+				content_srf.format = SVGA3D_P8;
+				break;
+
+			default:
+				DRM_ERROR("Invalid format\n");
+				ret = -EINVAL;
+				goto err_unref_content;
+			}
+
+			content_srf.flags             = 0;
+			content_srf.mip_levels[0]     = 1;
+			content_srf.multisample_count = 0;
+		} else {
+
+			stdu->content_fb_type = SEPARATE_SURFACE;
+
+			new_vfbs = vmw_framebuffer_to_vfbs(new_fb);
+			content_srf = *new_vfbs->surface;
+		}
+
+
+		ret = vmw_surface_gb_priv_define(crtc->dev,
+				0, /* because kernel visible only */
+				content_srf.flags,
+				content_srf.format,
+				true, /* a scanout buffer */
+				content_srf.mip_levels[0],
+				content_srf.multisample_count,
+				0,
+				display_base_size,
+				&display_srf);
+		if (unlikely(ret != 0)) {
+			DRM_ERROR("Cannot allocate a display FB.\n");
+			goto err_unref_content;
+		}
+
+		stdu->display_srf = display_srf;
+	} else {
+		new_vfbs = vmw_framebuffer_to_vfbs(new_fb);
+		stdu->display_srf = new_vfbs->surface;
+	}
+
+
+	ret = vmw_stdu_pin_display(stdu);
+	if (unlikely(ret != 0)) {
+		stdu->display_srf = NULL;
+		goto err_unref_content;
+	}
+
+	vmw_svga_enable(dev_priv);
+
+	/*
+	 * Steps to displaying a surface, assume surface is already
+	 * bound:
+	 *   1.  define a screen target
+	 *   2.  bind a fb to the screen target
+	 *   3.  update that screen target (this is done later by
+	 *       vmw_kms_stdu_do_surface_dirty_or_present)
+	 */
+	ret = vmw_stdu_define_st(dev_priv, stdu);
+	if (unlikely(ret != 0))
+		goto err_unpin_display_and_content;
+
+	ret = vmw_stdu_bind_st(dev_priv, stdu, &stdu->display_srf->res);
+	if (unlikely(ret != 0))
+		goto err_unpin_destroy_st;
+
+
+	connector->encoder = encoder;
+	encoder->crtc      = crtc;
+
+	crtc->mode    = *mode;
+	crtc->primary->fb = new_fb;
+	crtc->enabled = true;
+
+	return ret;
+
+err_unpin_destroy_st:
+	vmw_stdu_destroy_st(dev_priv, stdu);
+err_unpin_display_and_content:
+	vmw_stdu_unpin_display(stdu);
+err_unref_content:
+	stdu->content_fb = NULL;
+	return ret;
+}
+
+
+
+/**
+ * vmw_stdu_crtc_page_flip - Binds a buffer to a screen target
+ *
+ * @crtc: CRTC to attach FB to
+ * @fb: FB to attach
+ * @event: Event to be posted. This event should've been alloced
+ *         using k[mz]alloc, and should've been completely initialized.
+ * @page_flip_flags: Input flags.
+ *
+ * If the STDU uses the same display and content buffers, i.e. a true flip,
+ * this function will replace the existing display buffer with the new content
+ * buffer.
+ *
+ * If the STDU uses different display and content buffers, i.e. a blit, then
+ * only the content buffer will be updated.
+ *
+ * RETURNS:
+ * 0 on success, error code on failure
+ */
+static int vmw_stdu_crtc_page_flip(struct drm_crtc *crtc,
+				   struct drm_framebuffer *new_fb,
+				   struct drm_pending_vblank_event *event,
+				   uint32_t flags)
+
+{
+	struct vmw_private *dev_priv = vmw_priv(crtc->dev);
+	struct vmw_screen_target_display_unit *stdu;
+	int ret;
+
+	if (crtc == NULL)
+		return -EINVAL;
+
+	dev_priv          = vmw_priv(crtc->dev);
+	stdu              = vmw_crtc_to_stdu(crtc);
+	crtc->primary->fb = new_fb;
+	stdu->content_fb  = new_fb;
+
+	if (stdu->display_srf) {
+		/*
+		 * If the display surface is the same as the content surface
+		 * then remove the reference
+		 */
+		if (stdu->content_fb_type == SAME_AS_DISPLAY) {
+			if (stdu->defined) {
+				/* Unbind the current surface */
+				ret = vmw_stdu_bind_st(dev_priv, stdu, NULL);
+				if (unlikely(ret != 0))
+					goto err_out;
+			}
+			vmw_stdu_unpin_display(stdu);
+			stdu->display_srf = NULL;
+		}
+	}
+
+
+	if (!new_fb) {
+		/* Blanks the display */
+		(void) vmw_stdu_update_st(dev_priv, stdu);
+
+		return 0;
+	}
+
+
+	if (stdu->content_fb_type == SAME_AS_DISPLAY) {
+		stdu->display_srf = vmw_framebuffer_to_vfbs(new_fb)->surface;
+		ret = vmw_stdu_pin_display(stdu);
+		if (ret) {
+			stdu->display_srf = NULL;
+			goto err_out;
+		}
+
+		/* Bind display surface */
+		ret = vmw_stdu_bind_st(dev_priv, stdu, &stdu->display_srf->res);
+		if (unlikely(ret != 0))
+			goto err_unpin_display_and_content;
+	}
+
+	/* Update display surface: after this point everything is bound */
+	ret = vmw_stdu_update_st(dev_priv, stdu);
+	if (unlikely(ret != 0))
+		return ret;
+
+	if (event) {
+		struct vmw_fence_obj *fence = NULL;
+		struct drm_file *file_priv = event->base.file_priv;
+
+		vmw_execbuf_fence_commands(NULL, dev_priv, &fence, NULL);
+		if (!fence)
+			return -ENOMEM;
+
+		ret = vmw_event_fence_action_queue(file_priv, fence,
+						   &event->base,
+						   &event->event.tv_sec,
+						   &event->event.tv_usec,
+						   true);
+		vmw_fence_obj_unreference(&fence);
+	} else {
+		vmw_fifo_flush(dev_priv, false);
+	}
+
+	return ret;
+
+err_unpin_display_and_content:
+	vmw_stdu_unpin_display(stdu);
+err_out:
+	crtc->primary->fb = NULL;
+	stdu->content_fb = NULL;
+	return ret;
+}
+
+
+/**
+ * vmw_stdu_dmabuf_clip - Callback to encode a suface DMA command cliprect
+ *
+ * @dirty: The closure structure.
+ *
+ * Encodes a surface DMA command cliprect and updates the bounding box
+ * for the DMA.
+ */
+static void vmw_stdu_dmabuf_clip(struct vmw_kms_dirty *dirty)
+{
+	struct vmw_stdu_dirty *ddirty =
+		container_of(dirty, struct vmw_stdu_dirty, base);
+	struct vmw_stdu_dma *cmd = dirty->cmd;
+	struct SVGA3dCopyBox *blit = (struct SVGA3dCopyBox *) &cmd[1];
+
+	blit += dirty->num_hits;
+	blit->srcx = dirty->fb_x;
+	blit->srcy = dirty->fb_y;
+	blit->x = dirty->unit_x1;
+	blit->y = dirty->unit_y1;
+	blit->d = 1;
+	blit->w = dirty->unit_x2 - dirty->unit_x1;
+	blit->h = dirty->unit_y2 - dirty->unit_y1;
+	dirty->num_hits++;
+
+	if (ddirty->transfer != SVGA3D_WRITE_HOST_VRAM)
+		return;
+
+	/* Destination bounding box */
+	ddirty->left = min_t(s32, ddirty->left, dirty->unit_x1);
+	ddirty->top = min_t(s32, ddirty->top, dirty->unit_y1);
+	ddirty->right = max_t(s32, ddirty->right, dirty->unit_x2);
+	ddirty->bottom = max_t(s32, ddirty->bottom, dirty->unit_y2);
+}
+
+/**
+ * vmw_stdu_dmabuf_fifo_commit - Callback to fill in and submit a DMA command.
+ *
+ * @dirty: The closure structure.
+ *
+ * Fills in the missing fields in a DMA command, and optionally encodes
+ * a screen target update command, depending on transfer direction.
+ */
+static void vmw_stdu_dmabuf_fifo_commit(struct vmw_kms_dirty *dirty)
+{
+	struct vmw_stdu_dirty *ddirty =
+		container_of(dirty, struct vmw_stdu_dirty, base);
+	struct vmw_screen_target_display_unit *stdu =
+		container_of(dirty->unit, typeof(*stdu), base);
+	struct vmw_stdu_dma *cmd = dirty->cmd;
+	struct SVGA3dCopyBox *blit = (struct SVGA3dCopyBox *) &cmd[1];
+	SVGA3dCmdSurfaceDMASuffix *suffix =
+		(SVGA3dCmdSurfaceDMASuffix *) &blit[dirty->num_hits];
+	size_t blit_size = sizeof(*blit) * dirty->num_hits + sizeof(*suffix);
+
+	if (!dirty->num_hits) {
+		vmw_fifo_commit(dirty->dev_priv, 0);
+		return;
+	}
+
+	cmd->header.id = SVGA_3D_CMD_SURFACE_DMA;
+	cmd->header.size = sizeof(cmd->body) + blit_size;
+	vmw_bo_get_guest_ptr(&ddirty->buf->base, &cmd->body.guest.ptr);
+	cmd->body.guest.pitch = ddirty->pitch;
+	cmd->body.host.sid = stdu->display_srf->res.id;
+	cmd->body.host.face = 0;
+	cmd->body.host.mipmap = 0;
+	cmd->body.transfer = ddirty->transfer;
+	suffix->suffixSize = sizeof(*suffix);
+	suffix->maximumOffset = ddirty->buf->base.num_pages * PAGE_SIZE;
+
+	if (ddirty->transfer == SVGA3D_WRITE_HOST_VRAM) {
+		blit_size += sizeof(struct vmw_stdu_update);
+
+		vmw_stdu_populate_update(&suffix[1], stdu->base.unit,
+					 ddirty->left, ddirty->right,
+					 ddirty->top, ddirty->bottom);
+	}
+
+	vmw_fifo_commit(dirty->dev_priv, sizeof(*cmd) + blit_size);
+
+	ddirty->left = ddirty->top = S32_MAX;
+	ddirty->right = ddirty->bottom = S32_MIN;
+}
+
+/**
+ * vmw_kms_stdu_dma - Perform a DMA transfer between a dma-buffer backed
+ * framebuffer and the screen target system.
+ *
+ * @dev_priv: Pointer to the device private structure.
+ * @file_priv: Pointer to a struct drm-file identifying the caller. May be
+ * set to NULL, but then @user_fence_rep must also be set to NULL.
+ * @vfb: Pointer to the dma-buffer backed framebuffer.
+ * @clips: Array of clip rects. Either @clips or @vclips must be NULL.
+ * @vclips: Alternate array of clip rects. Either @clips or @vclips must
+ * be NULL.
+ * @num_clips: Number of clip rects in @clips or @vclips.
+ * @increment: Increment to use when looping over @clips or @vclips.
+ * @to_surface: Whether to DMA to the screen target system as opposed to
+ * from the screen target system.
+ * @interruptible: Whether to perform waits interruptible if possible.
+ *
+ * If DMA-ing till the screen target system, the function will also notify
+ * the screen target system that a bounding box of the cliprects has been
+ * updated.
+ * Returns 0 on success, negative error code on failure. -ERESTARTSYS if
+ * interrupted.
+ */
+int vmw_kms_stdu_dma(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_clip_rect *clips,
+		     struct drm_vmw_rect *vclips,
+		     uint32_t num_clips,
+		     int increment,
+		     bool to_surface,
+		     bool interruptible)
+{
+	struct vmw_dma_buffer *buf =
+		container_of(vfb, struct vmw_framebuffer_dmabuf, base)->buffer;
+	struct vmw_stdu_dirty ddirty;
+	int ret;
+
+	ret = vmw_kms_helper_buffer_prepare(dev_priv, buf, interruptible,
+					    false);
+	if (ret)
+		return ret;
+
+	ddirty.transfer = (to_surface) ? SVGA3D_WRITE_HOST_VRAM :
+		SVGA3D_READ_HOST_VRAM;
+	ddirty.left = ddirty.top = S32_MAX;
+	ddirty.right = ddirty.bottom = S32_MIN;
+	ddirty.pitch = vfb->base.pitches[0];
+	ddirty.buf = buf;
+	ddirty.base.fifo_commit = vmw_stdu_dmabuf_fifo_commit;
+	ddirty.base.clip = vmw_stdu_dmabuf_clip;
+	ddirty.base.fifo_reserve_size = sizeof(struct vmw_stdu_dma) +
+		num_clips * sizeof(SVGA3dCopyBox) +
+		sizeof(SVGA3dCmdSurfaceDMASuffix);
+	if (to_surface)
+		ddirty.base.fifo_reserve_size += sizeof(struct vmw_stdu_update);
+
+	ret = vmw_kms_helper_dirty(dev_priv, vfb, clips, vclips,
+				   0, 0, num_clips, increment, &ddirty.base);
+	vmw_kms_helper_buffer_finish(dev_priv, file_priv, buf, NULL,
+				     user_fence_rep);
+
+	return ret;
+}
+
+/**
+ * vmw_stdu_surface_clip - Callback to encode a surface copy command cliprect
+ *
+ * @dirty: The closure structure.
+ *
+ * Encodes a surface copy command cliprect and updates the bounding box
+ * for the copy.
+ */
+static void vmw_kms_stdu_surface_clip(struct vmw_kms_dirty *dirty)
+{
+	struct vmw_stdu_dirty *sdirty =
+		container_of(dirty, struct vmw_stdu_dirty, base);
+	struct vmw_stdu_surface_copy *cmd = dirty->cmd;
+	struct vmw_screen_target_display_unit *stdu =
+		container_of(dirty->unit, typeof(*stdu), base);
+
+	if (sdirty->sid != stdu->display_srf->res.id) {
+		struct SVGA3dCopyBox *blit = (struct SVGA3dCopyBox *) &cmd[1];
+
+		blit += dirty->num_hits;
+		blit->srcx = dirty->fb_x;
+		blit->srcy = dirty->fb_y;
+		blit->x = dirty->unit_x1;
+		blit->y = dirty->unit_y1;
+		blit->d = 1;
+		blit->w = dirty->unit_x2 - dirty->unit_x1;
+		blit->h = dirty->unit_y2 - dirty->unit_y1;
+	}
+
+	dirty->num_hits++;
+
+	/* Destination bounding box */
+	sdirty->left = min_t(s32, sdirty->left, dirty->unit_x1);
+	sdirty->top = min_t(s32, sdirty->top, dirty->unit_y1);
+	sdirty->right = max_t(s32, sdirty->right, dirty->unit_x2);
+	sdirty->bottom = max_t(s32, sdirty->bottom, dirty->unit_y2);
+}
+
+/**
+ * vmw_stdu_surface_fifo_commit - Callback to fill in and submit a surface
+ * copy command.
+ *
+ * @dirty: The closure structure.
+ *
+ * Fills in the missing fields in a surface copy command, and encodes a screen
+ * target update command.
+ */
+static void vmw_kms_stdu_surface_fifo_commit(struct vmw_kms_dirty *dirty)
+{
+	struct vmw_stdu_dirty *sdirty =
+		container_of(dirty, struct vmw_stdu_dirty, base);
+	struct vmw_screen_target_display_unit *stdu =
+		container_of(dirty->unit, typeof(*stdu), base);
+	struct vmw_stdu_surface_copy *cmd = dirty->cmd;
+	struct vmw_stdu_update *update;
+	size_t blit_size = sizeof(SVGA3dCopyBox) * dirty->num_hits;
+	size_t commit_size;
+
+	if (!dirty->num_hits) {
+		vmw_fifo_commit(dirty->dev_priv, 0);
+		return;
+	}
+
+	if (sdirty->sid != stdu->display_srf->res.id) {
+		struct SVGA3dCopyBox *blit = (struct SVGA3dCopyBox *) &cmd[1];
+
+		cmd->header.id = SVGA_3D_CMD_SURFACE_COPY;
+		cmd->header.size = sizeof(cmd->body) + blit_size;
+		cmd->body.src.sid = sdirty->sid;
+		cmd->body.dest.sid = stdu->display_srf->res.id;
+		update = (struct vmw_stdu_update *) &blit[dirty->num_hits];
+		commit_size = sizeof(*cmd) + blit_size + sizeof(*update);
+	} else {
+		update = dirty->cmd;
+		commit_size = sizeof(*update);
+	}
+
+	vmw_stdu_populate_update(update, stdu->base.unit, sdirty->left,
+				 sdirty->right, sdirty->top, sdirty->bottom);
+
+	vmw_fifo_commit(dirty->dev_priv, commit_size);
+
+	sdirty->left = sdirty->top = S32_MAX;
+	sdirty->right = sdirty->bottom = S32_MIN;
+}
+
+/**
+ * vmw_kms_stdu_surface_dirty - Dirty part of a surface backed framebuffer
+ *
+ * @dev_priv: Pointer to the device private structure.
+ * @framebuffer: Pointer to the surface-buffer backed framebuffer.
+ * @clips: Array of clip rects. Either @clips or @vclips must be NULL.
+ * @vclips: Alternate array of clip rects. Either @clips or @vclips must
+ * be NULL.
+ * @srf: Pointer to surface to blit from. If NULL, the surface attached
+ * to @framebuffer will be used.
+ * @dest_x: X coordinate offset to align @srf with framebuffer coordinates.
+ * @dest_y: Y coordinate offset to align @srf with framebuffer coordinates.
+ * @num_clips: Number of clip rects in @clips.
+ * @inc: Increment to use when looping over @clips.
+ * @out_fence: If non-NULL, will return a ref-counted pointer to a
+ * struct vmw_fence_obj. The returned fence pointer may be NULL in which
+ * case the device has already synchronized.
+ *
+ * Returns 0 on success, negative error code on failure. -ERESTARTSYS if
+ * interrupted.
+ */
+int vmw_kms_stdu_surface_dirty(struct vmw_private *dev_priv,
+			       struct vmw_framebuffer *framebuffer,
+			       struct drm_clip_rect *clips,
+			       struct drm_vmw_rect *vclips,
+			       struct vmw_resource *srf,
+			       s32 dest_x,
+			       s32 dest_y,
+			       unsigned num_clips, int inc,
+			       struct vmw_fence_obj **out_fence)
+{
+	struct vmw_framebuffer_surface *vfbs =
+		container_of(framebuffer, typeof(*vfbs), base);
+	struct vmw_stdu_dirty sdirty;
+	int ret;
+
+	if (!srf)
+		srf = &vfbs->surface->res;
+
+	ret = vmw_kms_helper_resource_prepare(srf, true);
+	if (ret)
+		return ret;
+
+	if (vfbs->is_dmabuf_proxy) {
+		ret = vmw_kms_update_proxy(srf, clips, num_clips, inc);
+		if (ret)
+			goto out_finish;
+	}
+
+	sdirty.base.fifo_commit = vmw_kms_stdu_surface_fifo_commit;
+	sdirty.base.clip = vmw_kms_stdu_surface_clip;
+	sdirty.base.fifo_reserve_size = sizeof(struct vmw_stdu_surface_copy) +
+		sizeof(SVGA3dCopyBox) * num_clips +
+		sizeof(struct vmw_stdu_update);
+	sdirty.sid = srf->id;
+	sdirty.left = sdirty.top = S32_MAX;
+	sdirty.right = sdirty.bottom = S32_MIN;
+
+	ret = vmw_kms_helper_dirty(dev_priv, framebuffer, clips, vclips,
+				   dest_x, dest_y, num_clips, inc,
+				   &sdirty.base);
+out_finish:
+	vmw_kms_helper_resource_finish(srf, out_fence);
+
+	return ret;
+}
+
+
+/*
+ *  Screen Target CRTC dispatch table
+ */
+static struct drm_crtc_funcs vmw_stdu_crtc_funcs = {
+	.save = vmw_du_crtc_save,
+	.restore = vmw_du_crtc_restore,
+	.cursor_set2 = vmw_du_crtc_cursor_set2,
+	.cursor_move = vmw_du_crtc_cursor_move,
+	.gamma_set = vmw_du_crtc_gamma_set,
+	.destroy = vmw_stdu_crtc_destroy,
+	.set_config = vmw_stdu_crtc_set_config,
+	.page_flip = vmw_stdu_crtc_page_flip,
+};
+
+
+
+/******************************************************************************
+ * Screen Target Display Unit Encoder Functions
+ *****************************************************************************/
+
+/**
+ * vmw_stdu_encoder_destroy - cleans up the STDU
+ *
+ * @encoder: used the get the containing STDU
+ *
+ * vmwgfx cleans up crtc/encoder/connector all at the same time so technically
+ * this can be a no-op.  Nevertheless, it doesn't hurt of have this in case
+ * the common KMS code changes and somehow vmw_stdu_crtc_destroy() doesn't
+ * get called.
+ */
+static void vmw_stdu_encoder_destroy(struct drm_encoder *encoder)
+{
+	vmw_stdu_destroy(vmw_encoder_to_stdu(encoder));
+}
+
+static struct drm_encoder_funcs vmw_stdu_encoder_funcs = {
+	.destroy = vmw_stdu_encoder_destroy,
+};
+
+
+
+/******************************************************************************
+ * Screen Target Display Unit Connector Functions
+ *****************************************************************************/
+
+/**
+ * vmw_stdu_connector_destroy - cleans up the STDU
+ *
+ * @connector: used to get the containing STDU
+ *
+ * vmwgfx cleans up crtc/encoder/connector all at the same time so technically
+ * this can be a no-op.  Nevertheless, it doesn't hurt of have this in case
+ * the common KMS code changes and somehow vmw_stdu_crtc_destroy() doesn't
+ * get called.
+ */
+static void vmw_stdu_connector_destroy(struct drm_connector *connector)
+{
+	vmw_stdu_destroy(vmw_connector_to_stdu(connector));
+}
+
+
+
+static struct drm_connector_funcs vmw_stdu_connector_funcs = {
+	.dpms = vmw_du_connector_dpms,
+	.save = vmw_du_connector_save,
+	.restore = vmw_du_connector_restore,
+	.detect = vmw_du_connector_detect,
+	.fill_modes = vmw_du_connector_fill_modes,
+	.set_property = vmw_du_connector_set_property,
+	.destroy = vmw_stdu_connector_destroy,
+};
+
+
+
+/**
+ * vmw_stdu_init - Sets up a Screen Target Display Unit
+ *
+ * @dev_priv: VMW DRM device
+ * @unit: unit number range from 0 to VMWGFX_NUM_DISPLAY_UNITS
+ *
+ * This function is called once per CRTC, and allocates one Screen Target
+ * display unit to represent that CRTC.  Since the SVGA device does not separate
+ * out encoder and connector, they are represented as part of the STDU as well.
+ */
+static int vmw_stdu_init(struct vmw_private *dev_priv, unsigned unit)
+{
+	struct vmw_screen_target_display_unit *stdu;
+	struct drm_device *dev = dev_priv->dev;
+	struct drm_connector *connector;
+	struct drm_encoder *encoder;
+	struct drm_crtc *crtc;
+
+
+	stdu = kzalloc(sizeof(*stdu), GFP_KERNEL);
+	if (!stdu)
+		return -ENOMEM;
+
+	stdu->base.unit = unit;
+	crtc = &stdu->base.crtc;
+	encoder = &stdu->base.encoder;
+	connector = &stdu->base.connector;
+
+	stdu->base.pref_active = (unit == 0);
+	stdu->base.pref_width  = dev_priv->initial_width;
+	stdu->base.pref_height = dev_priv->initial_height;
+	stdu->base.is_implicit = true;
+
+	drm_connector_init(dev, connector, &vmw_stdu_connector_funcs,
+			   DRM_MODE_CONNECTOR_VIRTUAL);
+	connector->status = vmw_du_connector_detect(connector, false);
+
+	drm_encoder_init(dev, encoder, &vmw_stdu_encoder_funcs,
+			 DRM_MODE_ENCODER_VIRTUAL);
+	drm_mode_connector_attach_encoder(connector, encoder);
+	encoder->possible_crtcs = (1 << unit);
+	encoder->possible_clones = 0;
+
+	(void) drm_connector_register(connector);
+
+	drm_crtc_init(dev, crtc, &vmw_stdu_crtc_funcs);
+
+	drm_mode_crtc_set_gamma_size(crtc, 256);
+
+	drm_object_attach_property(&connector->base,
+				   dev->mode_config.dirty_info_property,
+				   1);
+
+	return 0;
+}
+
+
+
+/**
+ *  vmw_stdu_destroy - Cleans up a vmw_screen_target_display_unit
+ *
+ *  @stdu:  Screen Target Display Unit to be destroyed
+ *
+ *  Clean up after vmw_stdu_init
+ */
+static void vmw_stdu_destroy(struct vmw_screen_target_display_unit *stdu)
+{
+	vmw_stdu_unpin_display(stdu);
+
+	vmw_du_cleanup(&stdu->base);
+	kfree(stdu);
+}
+
+
+
+/******************************************************************************
+ * Screen Target Display KMS Functions
+ *
+ * These functions are called by the common KMS code in vmwgfx_kms.c
+ *****************************************************************************/
+
+/**
+ * vmw_kms_stdu_init_display - Initializes a Screen Target based display
+ *
+ * @dev_priv: VMW DRM device
+ *
+ * This function initialize a Screen Target based display device.  It checks
+ * the capability bits to make sure the underlying hardware can support
+ * screen targets, and then creates the maximum number of CRTCs, a.k.a Display
+ * Units, as supported by the display hardware.
+ *
+ * RETURNS:
+ * 0 on success, error code otherwise
+ */
+int vmw_kms_stdu_init_display(struct vmw_private *dev_priv)
+{
+	struct drm_device *dev = dev_priv->dev;
+	int i, ret;
+
+
+	/* Do nothing if Screen Target support is turned off */
+	if (!VMWGFX_ENABLE_SCREEN_TARGET_OTABLE)
+		return -ENOSYS;
+
+	if (!(dev_priv->capabilities & SVGA_CAP_GBOBJECTS))
+		return -ENOSYS;
+
+	ret = drm_vblank_init(dev, VMWGFX_NUM_DISPLAY_UNITS);
+	if (unlikely(ret != 0))
+		return ret;
+
+	ret = drm_mode_create_dirty_info_property(dev);
+	if (unlikely(ret != 0))
+		goto err_vblank_cleanup;
+
+	dev_priv->active_display_unit = vmw_du_screen_target;
+
+	for (i = 0; i < VMWGFX_NUM_DISPLAY_UNITS; ++i) {
+		ret = vmw_stdu_init(dev_priv, i);
+
+		if (unlikely(ret != 0)) {
+			DRM_ERROR("Failed to initialize STDU %d", i);
+			goto err_vblank_cleanup;
+		}
+	}
+
+	DRM_INFO("Screen Target Display device initialized\n");
+
+	return 0;
+
+err_vblank_cleanup:
+	drm_vblank_cleanup(dev);
+	return ret;
+}
+
+
+
+/**
+ * vmw_kms_stdu_close_display - Cleans up after vmw_kms_stdu_init_display
+ *
+ * @dev_priv: VMW DRM device
+ *
+ * Frees up any resources allocated by vmw_kms_stdu_init_display
+ *
+ * RETURNS:
+ * 0 on success
+ */
+int vmw_kms_stdu_close_display(struct vmw_private *dev_priv)
+{
+	struct drm_device *dev = dev_priv->dev;
+
+	drm_vblank_cleanup(dev);
+
+	return 0;
+}