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author | Deepak Rawat <drawat@vmware.com> | 2018-09-13 12:34:37 +0200 |
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committer | Thomas Hellstrom <thellstrom@vmware.com> | 2018-09-20 08:00:03 +0200 |
commit | 0c1b174b1b9a497230f937345d4db76fea267398 (patch) | |
tree | 9782bd041611ae6f52a48854fbcef3080e10edd9 | |
parent | bfc888261474efb0676f0e1d128f22c9692b97b1 (diff) | |
download | lwn-0c1b174b1b9a497230f937345d4db76fea267398.tar.gz lwn-0c1b174b1b9a497230f937345d4db76fea267398.zip |
drm/vmwgfx: limit screen size to stdu_max during check_modeset
For STDU individual screen target size is limited by
SVGA_REG_SCREENTARGET_MAX_WIDTH/HEIGHT registers so add that limit
during atomic check_modeset.
An additional limit is placed in the update_layout ioctl to avoid
requesting layouts that current user-space typically can't support.
Also modified the comments to reflect current limitation on topology.
Signed-off-by: Deepak Rawat <drawat@vmware.com>
Reviewed-by: Sinclair Yeh <syeh@vmware.com>
Reviewed-by: Thomas Hellstrom <thellstrom@vmware.com>
Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
-rw-r--r-- | drivers/gpu/drm/vmwgfx/vmwgfx_kms.c | 30 |
1 files changed, 22 insertions, 8 deletions
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c b/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c index 636b962849c8..12a41b039167 100644 --- a/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c +++ b/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c @@ -1512,21 +1512,19 @@ static int vmw_kms_check_display_memory(struct drm_device *dev, struct drm_rect *rects) { struct vmw_private *dev_priv = vmw_priv(dev); - struct drm_mode_config *mode_config = &dev->mode_config; struct drm_rect bounding_box = {0}; u64 total_pixels = 0, pixel_mem, bb_mem; int i; for (i = 0; i < num_rects; i++) { /* - * Currently this check is limiting the topology within max - * texture/screentarget size. This should change in future when - * user-space support multiple fb with topology. + * For STDU only individual screen (screen target) is limited by + * SCREENTARGET_MAX_WIDTH/HEIGHT registers. */ - if (rects[i].x1 < 0 || rects[i].y1 < 0 || - rects[i].x2 > mode_config->max_width || - rects[i].y2 > mode_config->max_height) { - DRM_ERROR("Invalid GUI layout.\n"); + if (dev_priv->active_display_unit == vmw_du_screen_target && + (drm_rect_width(&rects[i]) > dev_priv->stdu_max_width || + drm_rect_height(&rects[i]) > dev_priv->stdu_max_height)) { + DRM_ERROR("Screen size not supported.\n"); return -EINVAL; } @@ -2376,6 +2374,7 @@ int vmw_kms_update_layout_ioctl(struct drm_device *dev, void *data, struct drm_file *file_priv) { struct vmw_private *dev_priv = vmw_priv(dev); + struct drm_mode_config *mode_config = &dev->mode_config; struct drm_vmw_update_layout_arg *arg = (struct drm_vmw_update_layout_arg *)data; void __user *user_rects; @@ -2421,6 +2420,21 @@ int vmw_kms_update_layout_ioctl(struct drm_device *dev, void *data, drm_rects[i].y1 = curr_rect.y; drm_rects[i].x2 = curr_rect.x + curr_rect.w; drm_rects[i].y2 = curr_rect.y + curr_rect.h; + + /* + * Currently this check is limiting the topology within + * mode_config->max (which actually is max texture size + * supported by virtual device). This limit is here to address + * window managers that create a big framebuffer for whole + * topology. + */ + if (drm_rects[i].x1 < 0 || drm_rects[i].y1 < 0 || + drm_rects[i].x2 > mode_config->max_width || + drm_rects[i].y2 > mode_config->max_height) { + DRM_ERROR("Invalid GUI layout.\n"); + ret = -EINVAL; + goto out_free; + } } ret = vmw_kms_check_display_memory(dev, arg->num_outputs, drm_rects); |