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/******************************************************************************

 *

 * 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 

#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;