diff options
Diffstat (limited to 'drivers/gpu/drm/drm_crtc.c')
-rw-r--r-- | drivers/gpu/drm/drm_crtc.c | 109 |
1 files changed, 0 insertions, 109 deletions
diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c index 7612f85e99fb..b0827634af18 100644 --- a/drivers/gpu/drm/drm_crtc.c +++ b/drivers/gpu/drm/drm_crtc.c @@ -969,115 +969,6 @@ void drm_mode_config_reset(struct drm_device *dev) EXPORT_SYMBOL(drm_mode_config_reset); /** - * drm_mode_create_dumb_ioctl - create a dumb backing storage buffer - * @dev: DRM device - * @data: ioctl data - * @file_priv: DRM file info - * - * This creates a new dumb buffer in the driver's backing storage manager (GEM, - * TTM or something else entirely) and returns the resulting buffer handle. This - * handle can then be wrapped up into a framebuffer modeset object. - * - * Note that userspace is not allowed to use such objects for render - * acceleration - drivers must create their own private ioctls for such a use - * case. - * - * Called by the user via ioctl. - * - * Returns: - * Zero on success, negative errno on failure. - */ -int drm_mode_create_dumb_ioctl(struct drm_device *dev, - void *data, struct drm_file *file_priv) -{ - struct drm_mode_create_dumb *args = data; - u32 cpp, stride, size; - - if (!dev->driver->dumb_create) - return -ENOSYS; - if (!args->width || !args->height || !args->bpp) - return -EINVAL; - - /* overflow checks for 32bit size calculations */ - /* NOTE: DIV_ROUND_UP() can overflow */ - cpp = DIV_ROUND_UP(args->bpp, 8); - if (!cpp || cpp > 0xffffffffU / args->width) - return -EINVAL; - stride = cpp * args->width; - if (args->height > 0xffffffffU / stride) - return -EINVAL; - - /* test for wrap-around */ - size = args->height * stride; - if (PAGE_ALIGN(size) == 0) - return -EINVAL; - - /* - * handle, pitch and size are output parameters. Zero them out to - * prevent drivers from accidentally using uninitialized data. Since - * not all existing userspace is clearing these fields properly we - * cannot reject IOCTL with garbage in them. - */ - args->handle = 0; - args->pitch = 0; - args->size = 0; - - return dev->driver->dumb_create(file_priv, dev, args); -} - -/** - * drm_mode_mmap_dumb_ioctl - create an mmap offset for a dumb backing storage buffer - * @dev: DRM device - * @data: ioctl data - * @file_priv: DRM file info - * - * Allocate an offset in the drm device node's address space to be able to - * memory map a dumb buffer. - * - * Called by the user via ioctl. - * - * Returns: - * Zero on success, negative errno on failure. - */ -int drm_mode_mmap_dumb_ioctl(struct drm_device *dev, - void *data, struct drm_file *file_priv) -{ - struct drm_mode_map_dumb *args = data; - - /* call driver ioctl to get mmap offset */ - if (!dev->driver->dumb_map_offset) - return -ENOSYS; - - return dev->driver->dumb_map_offset(file_priv, dev, args->handle, &args->offset); -} - -/** - * drm_mode_destroy_dumb_ioctl - destroy a dumb backing strage buffer - * @dev: DRM device - * @data: ioctl data - * @file_priv: DRM file info - * - * This destroys the userspace handle for the given dumb backing storage buffer. - * Since buffer objects must be reference counted in the kernel a buffer object - * won't be immediately freed if a framebuffer modeset object still uses it. - * - * Called by the user via ioctl. - * - * Returns: - * Zero on success, negative errno on failure. - */ -int drm_mode_destroy_dumb_ioctl(struct drm_device *dev, - void *data, struct drm_file *file_priv) -{ - struct drm_mode_destroy_dumb *args = data; - - if (!dev->driver->dumb_destroy) - return -ENOSYS; - - return dev->driver->dumb_destroy(file_priv, dev, args->handle); -} - -/** * drm_mode_config_init - initialize DRM mode_configuration structure * @dev: DRM device * |