vmwgfx_stdu.c

		}

		vps->surf = vmw_surface_reference(new_vfbs->surface);
	}

	if (vps->surf) {

		/* Pin new surface before flipping */
		ret = vmw_resource_pin(&vps->surf->res, false);
		if (ret)
			goto out_srf_unref;

		vps->pinned++;
	}

	vps->content_fb_type = new_content_type;

	/*
	 * This should only happen if the buffer object is too large to create a
	 * proxy surface for.
	 */
	if (vps->content_fb_type == SEPARATE_BO)
		vps->cpp = new_fb->pitches[0] / new_fb->width;

	return 0;

out_srf_unref:
	vmw_surface_unreference(&vps->surf);
	return ret;
}

static uint32_t vmw_stdu_bo_fifo_size_cpu(struct vmw_du_update_plane *update,
					  uint32_t num_hits)
{
	return sizeof(struct vmw_stdu_update_gb_image) +
		sizeof(struct vmw_stdu_update);
}

static uint32_t vmw_stdu_bo_pre_clip_cpu(struct vmw_du_update_plane  *update,
					 void *cmd, uint32_t num_hits)
{
	struct vmw_du_update_plane_buffer *bo_update =
		container_of(update, typeof(*bo_update), base);

	bo_update->fb_left = INT_MAX;
	bo_update->fb_top = INT_MAX;

	return 0;
}

static uint32_t vmw_stdu_bo_clip_cpu(struct vmw_du_update_plane  *update,
				     void *cmd, struct drm_rect *clip,
				     uint32_t fb_x, uint32_t fb_y)
{
	struct vmw_du_update_plane_buffer *bo_update =
		container_of(update, typeof(*bo_update), base);

	bo_update->fb_left = min_t(int, bo_update->fb_left, fb_x);
	bo_update->fb_top = min_t(int, bo_update->fb_top, fb_y);

	return 0;
}

static uint32_t
vmw_stdu_bo_populate_update_cpu(struct vmw_du_update_plane  *update, void *cmd,
				struct drm_rect *bb)
{
	struct vmw_du_update_plane_buffer *bo_update;
	struct vmw_screen_target_display_unit *stdu;
	struct vmw_framebuffer_bo *vfbbo;
	struct vmw_diff_cpy diff = VMW_CPU_BLIT_DIFF_INITIALIZER(0);
	struct vmw_stdu_update_gb_image *cmd_img = cmd;
	struct vmw_stdu_update *cmd_update;
	struct ttm_buffer_object *src_bo, *dst_bo;
	u32 src_offset, dst_offset;
	s32 src_pitch, dst_pitch;
	s32 width, height;

	bo_update = container_of(update, typeof(*bo_update), base);
	stdu = container_of(update->du, typeof(*stdu), base);
	vfbbo = container_of(update->vfb, typeof(*vfbbo), base);

	width = bb->x2 - bb->x1;
	height = bb->y2 - bb->y1;

	diff.cpp = stdu->cpp;

	dst_bo = &stdu->display_srf->res.guest_memory_bo->tbo;
	dst_pitch = stdu->display_srf->metadata.base_size.width * stdu->cpp;
	dst_offset = bb->y1 * dst_pitch + bb->x1 * stdu->cpp;

	src_bo = &vfbbo->buffer->tbo;
	src_pitch = update->vfb->base.pitches[0];
	src_offset = bo_update->fb_top * src_pitch + bo_update->fb_left *
		stdu->cpp;

	(void) vmw_bo_cpu_blit(dst_bo, dst_offset, dst_pitch, src_bo,
			       src_offset, src_pitch, width * stdu->cpp, height,
			       &diff);

	if (drm_rect_visible(&diff.rect)) {
		SVGA3dBox *box = &cmd_img->body.box;

		cmd_img->header.id = SVGA_3D_CMD_UPDATE_GB_IMAGE;
		cmd_img->header.size = sizeof(cmd_img->body);
		cmd_img->body.image.sid = stdu->display_srf->res.id;
		cmd_img->body.image.face = 0;
		cmd_img->body.image.mipmap = 0;

		box->x = diff.rect.x1;
		box->y = diff.rect.y1;
		box->z = 0;
		box->w = drm_rect_width(&diff.rect);
		box->h = drm_rect_height(&diff.rect);
		box->d = 1;

		cmd_update = (struct vmw_stdu_update *)&cmd_img[1];
		vmw_stdu_populate_update(cmd_update, stdu->base.unit,
					 diff.rect.x1, diff.rect.x2,
					 diff.rect.y1, diff.rect.y2);

		return sizeof(*cmd_img) + sizeof(*cmd_update);
	}

	return 0;
}

/**
 * vmw_stdu_plane_update_bo - Update display unit for bo backed fb.
 * @dev_priv: device private.
 * @plane: plane state.
 * @old_state: old plane state.
 * @vfb: framebuffer which is blitted to display unit.
 * @out_fence: If non-NULL, will return a ref-counted pointer to vmw_fence_obj.
 *             The returned fence pointer may be NULL in which case the device
 *             has already synchronized.
 *
 * Return: 0 on success or a negative error code on failure.
 */
static int vmw_stdu_plane_update_bo(struct vmw_private *dev_priv,
				    struct drm_plane *plane,
				    struct drm_plane_state *old_state,
				    struct vmw_framebuffer *vfb,
				    struct vmw_fence_obj **out_fence)
{
	struct vmw_du_update_plane_buffer bo_update;

	memset(&bo_update, 0, sizeof(struct vmw_du_update_plane_buffer));
	bo_update.base.plane = plane;
	bo_update.base.old_state = old_state;
	bo_update.base.dev_priv = dev_priv;
	bo_update.base.du = vmw_crtc_to_du(plane->state->crtc);
	bo_update.base.vfb = vfb;
	bo_update.base.out_fence = out_fence;
	bo_update.base.mutex = NULL;
	bo_update.base.intr = false;

	bo_update.base.calc_fifo_size = vmw_stdu_bo_fifo_size_cpu;
	bo_update.base.pre_clip = vmw_stdu_bo_pre_clip_cpu;
	bo_update.base.clip = vmw_stdu_bo_clip_cpu;
	bo_update.base.post_clip = vmw_stdu_bo_populate_update_cpu;

	return vmw_du_helper_plane_update(&bo_update.base);
}

static uint32_t
vmw_stdu_surface_fifo_size_same_display(struct vmw_du_update_plane *update,
					uint32_t num_hits)
{
	struct vmw_framebuffer_surface *vfbs;
	uint32_t size = 0;

	vfbs = container_of(update->vfb, typeof(*vfbs), base);

	if (vfbs->is_bo_proxy)
		size += sizeof(struct vmw_stdu_update_gb_image) * num_hits;

	size += sizeof(struct vmw_stdu_update);

	return size;
}

static uint32_t vmw_stdu_surface_fifo_size(struct vmw_du_update_plane *update,
					   uint32_t num_hits)
{
	struct vmw_framebuffer_surface *vfbs;
	uint32_t size = 0;

	vfbs = container_of(update->vfb, typeof(*vfbs), base);

	if (vfbs->is_bo_proxy)
		size += sizeof(struct vmw_stdu_update_gb_image) * num_hits;

	size += sizeof(struct vmw_stdu_surface_copy) + sizeof(SVGA3dCopyBox) *
		num_hits + sizeof(struct vmw_stdu_update);

	return size;
}

static uint32_t
vmw_stdu_surface_update_proxy(struct vmw_du_update_plane *update, void *cmd)
{
	struct vmw_framebuffer_surface *vfbs;
	struct drm_plane_state *state = update->plane->state;
	struct drm_plane_state *old_state = update->old_state;
	struct vmw_stdu_update_gb_image *cmd_update = cmd;
	struct drm_atomic_helper_damage_iter iter;
	struct drm_rect clip;
	uint32_t copy_size = 0;

	vfbs = container_of(update->vfb, typeof(*vfbs), base);

	/*
	 * proxy surface is special where a buffer object type fb is wrapped
	 * in a surface and need an update gb image command to sync with device.
	 */
	drm_atomic_helper_damage_iter_init(&iter, old_state, state);
	drm_atomic_for_each_plane_damage(&iter, &clip) {
		SVGA3dBox *box = &cmd_update->body.box;

		cmd_update->header.id = SVGA_3D_CMD_UPDATE_GB_IMAGE;
		cmd_update->header.size = sizeof(cmd_update->body);
		cmd_update->body.image.sid = vfbs->surface->res.id;
		cmd_update->body.image.face = 0;
		cmd_update->body.image.mipmap = 0;

		box->x = clip.x1;
		box->y = clip.y1;
		box->z = 0;
		box->w = drm_rect_width(&clip);
		box->h = drm_rect_height(&clip);
		box->d = 1;

		copy_size += sizeof(*cmd_update);
		cmd_update++;
	}

	return copy_size;
}

static uint32_t
vmw_stdu_surface_populate_copy(struct vmw_du_update_plane  *update, void *cmd,
			       uint32_t num_hits)
{
	struct vmw_screen_target_display_unit *stdu;
	struct vmw_framebuffer_surface *vfbs;
	struct vmw_stdu_surface_copy *cmd_copy = cmd;

	stdu = container_of(update->du, typeof(*stdu), base);
	vfbs = container_of(update->vfb, typeof(*vfbs), base);

	cmd_copy->header.id = SVGA_3D_CMD_SURFACE_COPY;
	cmd_copy->header.size = sizeof(cmd_copy->body) + sizeof(SVGA3dCopyBox) *
		num_hits;
	cmd_copy->body.src.sid = vfbs->surface->res.id;
	cmd_copy->body.dest.sid = stdu->display_srf->res.id;

	return sizeof(*cmd_copy);
}

static uint32_t
vmw_stdu_surface_populate_clip(struct vmw_du_update_plane  *update, void *cmd,
			       struct drm_rect *clip, uint32_t fb_x,
			       uint32_t fb_y)
{
	struct SVGA3dCopyBox *box = cmd;

	box->srcx = fb_x;
	box->srcy = fb_y;
	box->srcz = 0;
	box->x = clip->x1;
	box->y = clip->y1;
	box->z = 0;
	box->w = drm_rect_width(clip);
	box->h = drm_rect_height(clip);
	box->d = 1;

	return sizeof(*box);
}

static uint32_t
vmw_stdu_surface_populate_update(struct vmw_du_update_plane  *update, void *cmd,
				 struct drm_rect *bb)
{
	vmw_stdu_populate_update(cmd, update->du->unit, bb->x1, bb->x2, bb->y1,
				 bb->y2);

	return sizeof(struct vmw_stdu_update);
}

/**
 * vmw_stdu_plane_update_surface - Update display unit for surface backed fb
 * @dev_priv: Device private
 * @plane: Plane state
 * @old_state: Old plane state
 * @vfb: Framebuffer which is blitted to display unit
 * @out_fence: If non-NULL, will return a ref-counted pointer to vmw_fence_obj.
 *             The returned fence pointer may be NULL in which case the device
 *             has already synchronized.
 *
 * Return: 0 on success or a negative error code on failure.
 */
static int vmw_stdu_plane_update_surface(struct vmw_private *dev_priv,
					 struct drm_plane *plane,
					 struct drm_plane_state *old_state,
					 struct vmw_framebuffer *vfb,
					 struct vmw_fence_obj **out_fence)
{
	struct vmw_du_update_plane srf_update;
	struct vmw_screen_target_display_unit *stdu;
	struct vmw_framebuffer_surface *vfbs;

	stdu = vmw_crtc_to_stdu(plane->state->crtc);
	vfbs = container_of(vfb, typeof(*vfbs), base);

	memset(&srf_update, 0, sizeof(struct vmw_du_update_plane));
	srf_update.plane = plane;
	srf_update.old_state = old_state;
	srf_update.dev_priv = dev_priv;
	srf_update.du = vmw_crtc_to_du(plane->state->crtc);
	srf_update.vfb = vfb;
	srf_update.out_fence = out_fence;
	srf_update.mutex = &dev_priv->cmdbuf_mutex;
	srf_update.intr = true;

	if (vfbs->is_bo_proxy)
		srf_update.post_prepare = vmw_stdu_surface_update_proxy;

	if (vfbs->surface->res.id != stdu->display_srf->res.id) {
		srf_update.calc_fifo_size = vmw_stdu_surface_fifo_size;
		srf_update.pre_clip = vmw_stdu_surface_populate_copy;
		srf_update.clip = vmw_stdu_surface_populate_clip;
	} else {
		srf_update.calc_fifo_size =
			vmw_stdu_surface_fifo_size_same_display;
	}

	srf_update.post_clip = vmw_stdu_surface_populate_update;

	return vmw_du_helper_plane_update(&srf_update);
}

/**
 * vmw_stdu_primary_plane_atomic_update - formally switches STDU to new plane
 * @plane: display plane
 * @state: Only used to get crtc info
 *
 * Formally update stdu->display_srf to the new plane, and bind the new
 * plane STDU.  This function is called during the commit phase when
 * all the preparation have been done and all the configurations have
 * been checked.
 */
static void
vmw_stdu_primary_plane_atomic_update(struct drm_plane *plane,
				     struct drm_atomic_state *state)
{
	struct drm_plane_state *old_state = drm_atomic_get_old_plane_state(state, plane);
	struct drm_plane_state *new_state = drm_atomic_get_new_plane_state(state, plane);
	struct vmw_plane_state *vps = vmw_plane_state_to_vps(new_state);
	struct drm_crtc *crtc = new_state->crtc;
	struct vmw_screen_target_display_unit *stdu;
	struct vmw_fence_obj *fence = NULL;
	struct vmw_private *dev_priv;
	int ret;

	/* If case of device error, maintain consistent atomic state */
	if (crtc && new_state->fb) {
		struct vmw_framebuffer *vfb =
			vmw_framebuffer_to_vfb(new_state->fb);
		stdu = vmw_crtc_to_stdu(crtc);
		dev_priv = vmw_priv(crtc->dev);

		stdu->display_srf = vps->surf;
		stdu->content_fb_type = vps->content_fb_type;
		stdu->cpp = vps->cpp;

		ret = vmw_stdu_bind_st(dev_priv, stdu, &stdu->display_srf->res);
		if (ret)
			DRM_ERROR("Failed to bind surface to STDU.\n");

		if (vfb->bo)
			ret = vmw_stdu_plane_update_bo(dev_priv, plane,
						       old_state, vfb, &fence);
		else
			ret = vmw_stdu_plane_update_surface(dev_priv, plane,
							    old_state, vfb,
							    &fence);
		if (ret)
			DRM_ERROR("Failed to update STDU.\n");
	} else {
		crtc = old_state->crtc;
		stdu = vmw_crtc_to_stdu(crtc);
		dev_priv = vmw_priv(crtc->dev);

		/* Blank STDU when fb and crtc are NULL */
		if (!stdu->defined)
			return;

		ret = vmw_stdu_bind_st(dev_priv, stdu, NULL);
		if (ret)
			DRM_ERROR("Failed to blank STDU\n");

		ret = vmw_stdu_update_st(dev_priv, stdu);
		if (ret)
			DRM_ERROR("Failed to update STDU.\n");

		return;
	}

	if (fence)
		vmw_fence_obj_unreference(&fence);
}


static const struct drm_plane_funcs vmw_stdu_plane_funcs = {
	.update_plane = drm_atomic_helper_update_plane,
	.disable_plane = drm_atomic_helper_disable_plane,
	.destroy = vmw_du_primary_plane_destroy,
	.reset = vmw_du_plane_reset,
	.atomic_duplicate_state = vmw_du_plane_duplicate_state,
	.atomic_destroy_state = vmw_du_plane_destroy_state,
};

static const struct drm_plane_funcs vmw_stdu_cursor_funcs = {
	.update_plane = drm_atomic_helper_update_plane,
	.disable_plane = drm_atomic_helper_disable_plane,
	.destroy = vmw_du_cursor_plane_destroy,
	.reset = vmw_du_plane_reset,
	.atomic_duplicate_state = vmw_du_plane_duplicate_state,
	.atomic_destroy_state = vmw_du_plane_destroy_state,
};


/*
 * Atomic Helpers
 */
static const struct
drm_plane_helper_funcs vmw_stdu_cursor_plane_helper_funcs = {
	.atomic_check = vmw_du_cursor_plane_atomic_check,
	.atomic_update = vmw_du_cursor_plane_atomic_update,
	.prepare_fb = vmw_du_cursor_plane_prepare_fb,
	.cleanup_fb = vmw_du_cursor_plane_cleanup_fb,
};

static const struct
drm_plane_helper_funcs vmw_stdu_primary_plane_helper_funcs = {
	.atomic_check = vmw_du_primary_plane_atomic_check,
	.atomic_update = vmw_stdu_primary_plane_atomic_update,
	.prepare_fb = vmw_stdu_primary_plane_prepare_fb,
	.cleanup_fb = vmw_stdu_primary_plane_cleanup_fb,
};

static const struct drm_crtc_helper_funcs vmw_stdu_crtc_helper_funcs = {
	.prepare = vmw_stdu_crtc_helper_prepare,
	.mode_set_nofb = vmw_stdu_crtc_mode_set_nofb,
	.atomic_check = vmw_du_crtc_atomic_check,
	.atomic_begin = vmw_du_crtc_atomic_begin,
	.atomic_flush = vmw_du_crtc_atomic_flush,
	.atomic_enable = vmw_stdu_crtc_atomic_enable,
	.atomic_disable = vmw_stdu_crtc_atomic_disable,
};


/**
 * 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.
 *
 * Returns: %0 on success or -errno code on failure
 */
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->drm;
	struct drm_connector *connector;
	struct drm_encoder *encoder;
	struct drm_plane *primary;
	struct vmw_cursor_plane *cursor;
	struct drm_crtc *crtc;
	int    ret;

	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;
	primary = &stdu->base.primary;
	cursor = &stdu->base.cursor;

	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 = false;

	/* Initialize primary plane */
	ret = drm_universal_plane_init(dev, primary,
				       0, &vmw_stdu_plane_funcs,
				       vmw_primary_plane_formats,
				       ARRAY_SIZE(vmw_primary_plane_formats),
				       NULL, DRM_PLANE_TYPE_PRIMARY, NULL);
	if (ret) {
		DRM_ERROR("Failed to initialize primary plane");
		goto err_free;
	}

	drm_plane_helper_add(primary, &vmw_stdu_primary_plane_helper_funcs);
	drm_plane_enable_fb_damage_clips(primary);

	/* Initialize cursor plane */
	ret = drm_universal_plane_init(dev, &cursor->base,
			0, &vmw_stdu_cursor_funcs,
			vmw_cursor_plane_formats,
			ARRAY_SIZE(vmw_cursor_plane_formats),
			NULL, DRM_PLANE_TYPE_CURSOR, NULL);
	if (ret) {
		DRM_ERROR("Failed to initialize cursor plane");
		drm_plane_cleanup(&stdu->base.primary);
		goto err_free;
	}

	drm_plane_helper_add(&cursor->base, &vmw_stdu_cursor_plane_helper_funcs);

	ret = drm_connector_init(dev, connector, &vmw_stdu_connector_funcs,
				 DRM_MODE_CONNECTOR_VIRTUAL);
	if (ret) {
		DRM_ERROR("Failed to initialize connector\n");
		goto err_free;
	}

	drm_connector_helper_add(connector, &vmw_stdu_connector_helper_funcs);
	connector->status = vmw_du_connector_detect(connector, false);

	ret = drm_encoder_init(dev, encoder, &vmw_stdu_encoder_funcs,
			       DRM_MODE_ENCODER_VIRTUAL, NULL);
	if (ret) {
		DRM_ERROR("Failed to initialize encoder\n");
		goto err_free_connector;
	}

	(void) drm_connector_attach_encoder(connector, encoder);
	encoder->possible_crtcs = (1 << unit);
	encoder->possible_clones = 0;

	ret = drm_connector_register(connector);
	if (ret) {
		DRM_ERROR("Failed to register connector\n");
		goto err_free_encoder;
	}

	ret = drm_crtc_init_with_planes(dev, crtc, primary,
					&cursor->base,
					&vmw_stdu_crtc_funcs, NULL);
	if (ret) {
		DRM_ERROR("Failed to initialize CRTC\n");
		goto err_free_unregister;
	}

	drm_crtc_helper_add(crtc, &vmw_stdu_crtc_helper_funcs);

	drm_mode_crtc_set_gamma_size(crtc, 256);

	drm_object_attach_property(&connector->base,
				   dev_priv->hotplug_mode_update_property, 1);
	drm_object_attach_property(&connector->base,
				   dev->mode_config.suggested_x_property, 0);
	drm_object_attach_property(&connector->base,
				   dev->mode_config.suggested_y_property, 0);
	return 0;

err_free_unregister:
	drm_connector_unregister(connector);
err_free_encoder:
	drm_encoder_cleanup(encoder);
err_free_connector:
	drm_connector_cleanup(connector);
err_free:
	kfree(stdu);
	return ret;
}



/**
 *  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_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->drm;
	int i, ret;


	/* Do nothing if there's no support for MOBs */
	if (!dev_priv->has_mob)
		return -ENOSYS;

	if (!(dev_priv->capabilities & SVGA_CAP_GBOBJECTS))
		return -ENOSYS;

	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_err(&dev_priv->drm,
				"Failed to initialize STDU %d", i);
			return ret;
		}
	}

	drm_mode_config_reset(dev);

	return 0;
}