drm: Extract drm_dumb_buffers.c
Just code movement, doc cleanup will follow up later. v2: Keep all the copyright notices. Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk> Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch> Link: http://patchwork.freedesktop.org/patch/msgid/20161114115825.22050-2-daniel.vetter@ffwll.ch
This commit is contained in:
Daniel Vetter
parent
196594efc2
commit
1a02ea434e
|
|
@ -15,7 +15,8 @@ drm-y := drm_auth.o drm_bufs.o drm_cache.o \
|
|||
drm_modeset_lock.o drm_atomic.o drm_bridge.o \
|
||||
drm_framebuffer.o drm_connector.o drm_blend.o \
|
||||
drm_encoder.o drm_mode_object.o drm_property.o \
|
||||
drm_plane.o drm_color_mgmt.o drm_print.o
|
||||
drm_plane.o drm_color_mgmt.o drm_print.o \
|
||||
drm_dumb_buffers.o
|
||||
|
||||
drm-$(CONFIG_COMPAT) += drm_ioc32.o
|
||||
drm-$(CONFIG_DRM_GEM_CMA_HELPER) += drm_gem_cma_helper.o
|
||||
|
|
|
|||
|
|
@ -968,115 +968,6 @@ 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
|
||||
|
|
|
|||
|
|
@ -43,14 +43,6 @@ int drm_crtc_check_viewport(const struct drm_crtc *crtc,
|
|||
|
||||
void drm_fb_release(struct drm_file *file_priv);
|
||||
|
||||
/* dumb buffer support IOCTLs */
|
||||
int drm_mode_create_dumb_ioctl(struct drm_device *dev,
|
||||
void *data, struct drm_file *file_priv);
|
||||
int drm_mode_mmap_dumb_ioctl(struct drm_device *dev,
|
||||
void *data, struct drm_file *file_priv);
|
||||
int drm_mode_destroy_dumb_ioctl(struct drm_device *dev,
|
||||
void *data, struct drm_file *file_priv);
|
||||
|
||||
/* IOCTLs */
|
||||
int drm_mode_getresources(struct drm_device *dev,
|
||||
void *data, struct drm_file *file_priv);
|
||||
|
|
@ -59,6 +51,16 @@ int drm_mode_getcrtc(struct drm_device *dev,
|
|||
int drm_mode_setcrtc(struct drm_device *dev,
|
||||
void *data, struct drm_file *file_priv);
|
||||
|
||||
/* drm_dumb_buffers.c */
|
||||
|
||||
/* IOCTLs */
|
||||
int drm_mode_create_dumb_ioctl(struct drm_device *dev,
|
||||
void *data, struct drm_file *file_priv);
|
||||
int drm_mode_mmap_dumb_ioctl(struct drm_device *dev,
|
||||
void *data, struct drm_file *file_priv);
|
||||
int drm_mode_destroy_dumb_ioctl(struct drm_device *dev,
|
||||
void *data, struct drm_file *file_priv);
|
||||
|
||||
/* drm_color_mgmt.c */
|
||||
|
||||
/* IOCTLs */
|
||||
|
|
|
|||
|
|
@ -0,0 +1,138 @@
|
|||
/*
|
||||
* Copyright (c) 2006-2008 Intel Corporation
|
||||
* Copyright (c) 2007 Dave Airlie <airlied@linux.ie>
|
||||
* Copyright (c) 2008 Red Hat Inc.
|
||||
* Copyright (c) 2016 Intel Corporation
|
||||
*
|
||||
* Permission to use, copy, modify, distribute, and sell this software and its
|
||||
* documentation for any purpose is hereby granted without fee, provided that
|
||||
* the above copyright notice appear in all copies and that both that copyright
|
||||
* notice and this permission notice appear in supporting documentation, and
|
||||
* that the name of the copyright holders not be used in advertising or
|
||||
* publicity pertaining to distribution of the software without specific,
|
||||
* written prior permission. The copyright holders make no representations
|
||||
* about the suitability of this software for any purpose. It is provided "as
|
||||
* is" without express or implied warranty.
|
||||
*
|
||||
* THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
|
||||
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
|
||||
* EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
|
||||
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
|
||||
* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
|
||||
* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
|
||||
* OF THIS SOFTWARE.
|
||||
*/
|
||||
|
||||
#include <drm/drmP.h>
|
||||
|
||||
#include "drm_crtc_internal.h"
|
||||
|
||||
/**
|
||||
* 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);
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue