forked from Minki/linux
drm/vmwgfx: Use modeset display memory validation for layout ioctl
Call the same display memory validation function which is used by modeset_check. This ensure consistency that kernel change preferred mode/topology only if supported. Also change the internal function to use drm_rect instead of drm_vmw_rect. Signed-off-by: Deepak Rawat <drawat@vmware.com> Reviewed-by: Thomas Hellstrom <thellstrom@vmware.com> Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
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0a80eb4c12
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5e24133ea3
@ -1968,13 +1968,15 @@ void vmw_disable_vblank(struct drm_device *dev, unsigned int pipe)
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{
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}
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/*
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* Small shared kms functions.
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/**
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* vmw_du_update_layout - Update the display unit with topology from resolution
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* plugin and generate DRM uevent
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* @dev_priv: device private
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* @num_rects: number of drm_rect in rects
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* @rects: toplogy to update
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*/
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static int vmw_du_update_layout(struct vmw_private *dev_priv, unsigned num,
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struct drm_vmw_rect *rects)
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static int vmw_du_update_layout(struct vmw_private *dev_priv,
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unsigned int num_rects, struct drm_rect *rects)
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{
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struct drm_device *dev = dev_priv->dev;
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struct vmw_display_unit *du;
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@ -1982,26 +1984,14 @@ static int vmw_du_update_layout(struct vmw_private *dev_priv, unsigned num,
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mutex_lock(&dev->mode_config.mutex);
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#if 0
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{
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unsigned int i;
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DRM_INFO("%s: new layout ", __func__);
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for (i = 0; i < num; i++)
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DRM_INFO("(%i, %i %ux%u) ", rects[i].x, rects[i].y,
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rects[i].w, rects[i].h);
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DRM_INFO("\n");
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}
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#endif
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list_for_each_entry(con, &dev->mode_config.connector_list, head) {
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du = vmw_connector_to_du(con);
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if (num > du->unit) {
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du->pref_width = rects[du->unit].w;
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du->pref_height = rects[du->unit].h;
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if (num_rects > du->unit) {
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du->pref_width = drm_rect_width(&rects[du->unit]);
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du->pref_height = drm_rect_height(&rects[du->unit]);
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du->pref_active = true;
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du->gui_x = rects[du->unit].x;
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du->gui_y = rects[du->unit].y;
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du->gui_x = rects[du->unit].x1;
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du->gui_y = rects[du->unit].y1;
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drm_object_property_set_value
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(&con->base, dev->mode_config.suggested_x_property,
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du->gui_x);
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@ -2322,7 +2312,25 @@ vmw_du_connector_atomic_get_property(struct drm_connector *connector,
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return 0;
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}
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/**
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* vmw_kms_update_layout_ioctl - Handler for DRM_VMW_UPDATE_LAYOUT ioctl
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* @dev: drm device for the ioctl
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* @data: data pointer for the ioctl
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* @file_priv: drm file for the ioctl call
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*
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* Update preferred topology of display unit as per ioctl request. The topology
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* is expressed as array of drm_vmw_rect.
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* e.g.
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* [0 0 640 480] [640 0 800 600] [0 480 640 480]
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*
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* NOTE:
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* The x and y offset (upper left) in drm_vmw_rect cannot be less than 0. Beside
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* device limit on topology, x + w and y + h (lower right) cannot be greater
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* than INT_MAX. So topology beyond these limits will return with error.
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*
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* Returns:
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* Zero on success, negative errno on failure.
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*/
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int vmw_kms_update_layout_ioctl(struct drm_device *dev, void *data,
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struct drm_file *file_priv)
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{
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@ -2331,15 +2339,12 @@ int vmw_kms_update_layout_ioctl(struct drm_device *dev, void *data,
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(struct drm_vmw_update_layout_arg *)data;
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void __user *user_rects;
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struct drm_vmw_rect *rects;
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struct drm_rect *drm_rects;
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unsigned rects_size;
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int ret;
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int i;
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u64 total_pixels = 0;
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struct drm_mode_config *mode_config = &dev->mode_config;
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struct drm_vmw_rect bounding_box = {0};
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int ret, i;
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if (!arg->num_outputs) {
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struct drm_vmw_rect def_rect = {0, 0, 800, 600};
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struct drm_rect def_rect = {0, 0, 800, 600};
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vmw_du_update_layout(dev_priv, 1, &def_rect);
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return 0;
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}
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@ -2358,52 +2363,29 @@ int vmw_kms_update_layout_ioctl(struct drm_device *dev, void *data,
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goto out_free;
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}
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for (i = 0; i < arg->num_outputs; ++i) {
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if (rects[i].x < 0 ||
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rects[i].y < 0 ||
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rects[i].x + rects[i].w > mode_config->max_width ||
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rects[i].y + rects[i].h > mode_config->max_height) {
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DRM_ERROR("Invalid GUI layout.\n");
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ret = -EINVAL;
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drm_rects = (struct drm_rect *)rects;
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for (i = 0; i < arg->num_outputs; i++) {
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struct drm_vmw_rect curr_rect;
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/* Verify user-space for overflow as kernel use drm_rect */
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if ((rects[i].x + rects[i].w > INT_MAX) ||
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(rects[i].y + rects[i].h > INT_MAX)) {
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ret = -ERANGE;
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goto out_free;
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}
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/*
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* bounding_box.w and bunding_box.h are used as
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* lower-right coordinates
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*/
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if (rects[i].x + rects[i].w > bounding_box.w)
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bounding_box.w = rects[i].x + rects[i].w;
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if (rects[i].y + rects[i].h > bounding_box.h)
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bounding_box.h = rects[i].y + rects[i].h;
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total_pixels += (u64) rects[i].w * (u64) rects[i].h;
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curr_rect = rects[i];
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drm_rects[i].x1 = curr_rect.x;
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drm_rects[i].y1 = curr_rect.y;
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drm_rects[i].x2 = curr_rect.x + curr_rect.w;
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drm_rects[i].y2 = curr_rect.y + curr_rect.h;
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}
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if (dev_priv->active_display_unit == vmw_du_screen_target) {
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/*
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* For Screen Targets, the limits for a toplogy are:
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* 1. Bounding box (assuming 32bpp) must be < prim_bb_mem
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* 2. Total pixels (assuming 32bpp) must be < prim_bb_mem
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*/
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u64 bb_mem = (u64) bounding_box.w * bounding_box.h * 4;
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u64 pixel_mem = total_pixels * 4;
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ret = vmw_kms_check_display_memory(dev, arg->num_outputs, drm_rects);
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if (bb_mem > dev_priv->prim_bb_mem) {
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DRM_ERROR("Topology is beyond supported limits.\n");
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ret = -EINVAL;
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goto out_free;
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}
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if (pixel_mem > dev_priv->prim_bb_mem) {
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DRM_ERROR("Combined output size too large\n");
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ret = -EINVAL;
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goto out_free;
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}
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}
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vmw_du_update_layout(dev_priv, arg->num_outputs, rects);
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if (ret == 0)
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vmw_du_update_layout(dev_priv, arg->num_outputs, drm_rects);
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out_free:
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kfree(rects);
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