From: Deepak Rawat drawat@vmware.com
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 --- drivers/gpu/drm/vmwgfx/vmwgfx_kms.c | 120 ++++++++++++---------------- 1 file changed, 51 insertions(+), 69 deletions(-)
diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c b/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c index a7c9a017fc3c..387bb39de839 100644 --- a/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c +++ b/drivers/gpu/drm/vmwgfx/vmwgfx_kms.c @@ -1968,13 +1968,15 @@ void vmw_disable_vblank(struct drm_device *dev, unsigned int pipe) { }
- -/* - * Small shared kms functions. +/** + * vmw_du_update_layout - Update the display unit with topology from resolution + * plugin and generate DRM uevent + * @dev_priv: device private + * @num_rects: number of drm_rect in rects + * @rects: toplogy to update */ - -static int vmw_du_update_layout(struct vmw_private *dev_priv, unsigned num, - struct drm_vmw_rect *rects) +static int vmw_du_update_layout(struct vmw_private *dev_priv, + unsigned int num_rects, struct drm_rect *rects) { struct drm_device *dev = dev_priv->dev; struct vmw_display_unit *du; @@ -1982,26 +1984,14 @@ static int vmw_du_update_layout(struct vmw_private *dev_priv, unsigned num,
mutex_lock(&dev->mode_config.mutex);
-#if 0 - { - unsigned int i; - - DRM_INFO("%s: new layout ", __func__); - for (i = 0; i < num; i++) - DRM_INFO("(%i, %i %ux%u) ", rects[i].x, rects[i].y, - rects[i].w, rects[i].h); - DRM_INFO("\n"); - } -#endif - list_for_each_entry(con, &dev->mode_config.connector_list, head) { du = vmw_connector_to_du(con); - if (num > du->unit) { - du->pref_width = rects[du->unit].w; - du->pref_height = rects[du->unit].h; + if (num_rects > du->unit) { + du->pref_width = drm_rect_width(&rects[du->unit]); + du->pref_height = drm_rect_height(&rects[du->unit]); du->pref_active = true; - du->gui_x = rects[du->unit].x; - du->gui_y = rects[du->unit].y; + du->gui_x = rects[du->unit].x1; + du->gui_y = rects[du->unit].y1; drm_object_property_set_value (&con->base, dev->mode_config.suggested_x_property, du->gui_x); @@ -2322,7 +2312,25 @@ vmw_du_connector_atomic_get_property(struct drm_connector *connector, return 0; }
- +/** + * vmw_kms_update_layout_ioctl - Handler for DRM_VMW_UPDATE_LAYOUT ioctl + * @dev: drm device for the ioctl + * @data: data pointer for the ioctl + * @file_priv: drm file for the ioctl call + * + * Update preferred topology of display unit as per ioctl request. The topology + * is expressed as array of drm_vmw_rect. + * e.g. + * [0 0 640 480] [640 0 800 600] [0 480 640 480] + * + * NOTE: + * The x and y offset (upper left) in drm_vmw_rect cannot be less than 0. Beside + * device limit on topology, x + w and y + h (lower right) cannot be greater + * than INT_MAX. So topology beyond these limits will return with error. + * + * Returns: + * Zero on success, negative errno on failure. + */ int vmw_kms_update_layout_ioctl(struct drm_device *dev, void *data, struct drm_file *file_priv) { @@ -2331,15 +2339,12 @@ int vmw_kms_update_layout_ioctl(struct drm_device *dev, void *data, (struct drm_vmw_update_layout_arg *)data; void __user *user_rects; struct drm_vmw_rect *rects; + struct drm_rect *drm_rects; unsigned rects_size; - int ret; - int i; - u64 total_pixels = 0; - struct drm_mode_config *mode_config = &dev->mode_config; - struct drm_vmw_rect bounding_box = {0}; + int ret, i;
if (!arg->num_outputs) { - struct drm_vmw_rect def_rect = {0, 0, 800, 600}; + struct drm_rect def_rect = {0, 0, 800, 600}; vmw_du_update_layout(dev_priv, 1, &def_rect); return 0; } @@ -2358,52 +2363,29 @@ int vmw_kms_update_layout_ioctl(struct drm_device *dev, void *data, goto out_free; }
- for (i = 0; i < arg->num_outputs; ++i) { - if (rects[i].x < 0 || - rects[i].y < 0 || - rects[i].x + rects[i].w > mode_config->max_width || - rects[i].y + rects[i].h > mode_config->max_height) { - DRM_ERROR("Invalid GUI layout.\n"); - ret = -EINVAL; - goto out_free; - } - - /* - * bounding_box.w and bunding_box.h are used as - * lower-right coordinates - */ - if (rects[i].x + rects[i].w > bounding_box.w) - bounding_box.w = rects[i].x + rects[i].w; - - if (rects[i].y + rects[i].h > bounding_box.h) - bounding_box.h = rects[i].y + rects[i].h; + drm_rects = (struct drm_rect *)rects;
- total_pixels += (u64) rects[i].w * (u64) rects[i].h; - } + for (i = 0; i < arg->num_outputs; i++) { + struct drm_vmw_rect curr_rect;
- if (dev_priv->active_display_unit == vmw_du_screen_target) { - /* - * For Screen Targets, the limits for a toplogy are: - * 1. Bounding box (assuming 32bpp) must be < prim_bb_mem - * 2. Total pixels (assuming 32bpp) must be < prim_bb_mem - */ - u64 bb_mem = (u64) bounding_box.w * bounding_box.h * 4; - u64 pixel_mem = total_pixels * 4; - - if (bb_mem > dev_priv->prim_bb_mem) { - DRM_ERROR("Topology is beyond supported limits.\n"); - ret = -EINVAL; + /* Verify user-space for overflow as kernel use drm_rect */ + if ((rects[i].x + rects[i].w > INT_MAX) || + (rects[i].y + rects[i].h > INT_MAX)) { + ret = -ERANGE; goto out_free; }
- if (pixel_mem > dev_priv->prim_bb_mem) { - DRM_ERROR("Combined output size too large\n"); - ret = -EINVAL; - goto out_free; - } + curr_rect = rects[i]; + drm_rects[i].x1 = curr_rect.x; + 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; }
- vmw_du_update_layout(dev_priv, arg->num_outputs, rects); + ret = vmw_kms_check_display_memory(dev, arg->num_outputs, drm_rects); + + if (ret == 0) + vmw_du_update_layout(dev_priv, arg->num_outputs, drm_rects);
out_free: kfree(rects);