2  * Copyright (c) 2006-2008 Intel Corporation
7  * Permission to use, copy, modify, distribute, and sell this software and its
12  * publicity pertaining to distribution of the software without specific,
14  * about the suitability of this software for any purpose.  It is provided "as
17  * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
23  * OF THIS SOFTWARE.
38  * to driver-specific ioctls. Furthermore actually creating a buffer object even
39  * for GEM-based drivers is done through a driver-specific ioctl - GEM only has
41  * issue for full-fledged graphics stacks that include device-specific userspace
42  * components (in libdrm for instance), this limit makes DRM-based early boot
57  * a hardware-specific ioctl to allocate suitable buffer objects.
66 	if (!dev->driver->dumb_create)  in drm_mode_create_dumb()
67 		return -ENOSYS;  in drm_mode_create_dumb()
68 	if (!args->width || !args->height || !args->bpp)  in drm_mode_create_dumb()
69 		return -EINVAL;  in drm_mode_create_dumb()
72 	if (args->bpp > U32_MAX - 8)  in drm_mode_create_dumb()
73 		return -EINVAL;  in drm_mode_create_dumb()
74 	cpp = DIV_ROUND_UP(args->bpp, 8);  in drm_mode_create_dumb()
75 	if (cpp > U32_MAX / args->width)  in drm_mode_create_dumb()
76 		return -EINVAL;  in drm_mode_create_dumb()
77 	stride = cpp * args->width;  in drm_mode_create_dumb()
78 	if (args->height > U32_MAX / stride)  in drm_mode_create_dumb()
79 		return -EINVAL;  in drm_mode_create_dumb()
81 	/* test for wrap-around */  in drm_mode_create_dumb()
82 	size = args->height * stride;  in drm_mode_create_dumb()
84 		return -EINVAL;  in drm_mode_create_dumb()
92 	args->handle = 0;  in drm_mode_create_dumb()
93 	args->pitch = 0;  in drm_mode_create_dumb()
94 	args->size = 0;  in drm_mode_create_dumb()
96 	return dev->driver->dumb_create(file_priv, dev, args);  in drm_mode_create_dumb()
106  * drm_mode_mmap_dumb_ioctl - create an mmap offset for a dumb backing storage buffer
124 	if (!dev->driver->dumb_create)  in drm_mode_mmap_dumb_ioctl()
125 		return -ENOSYS;  in drm_mode_mmap_dumb_ioctl()
127 	if (dev->driver->dumb_map_offset)  in drm_mode_mmap_dumb_ioctl()
128 		return dev->driver->dumb_map_offset(file_priv, dev,  in drm_mode_mmap_dumb_ioctl()
129 						    args->handle,  in drm_mode_mmap_dumb_ioctl()
130 						    &args->offset);  in drm_mode_mmap_dumb_ioctl()
132 		return drm_gem_dumb_map_offset(file_priv, dev, args->handle,  in drm_mode_mmap_dumb_ioctl()
133 					       &args->offset);  in drm_mode_mmap_dumb_ioctl()
139 	if (!dev->driver->dumb_create)  in drm_mode_destroy_dumb()
140 		return -ENOSYS;  in drm_mode_destroy_dumb()
150 	return drm_mode_destroy_dumb(dev, args->handle, file_priv);  in drm_mode_destroy_dumb_ioctl()