Commit 1a02ea43 authored by Daniel Vetter's avatar Daniel Vetter

drm: Extract drm_dumb_buffers.c

Just code movement, doc cleanup will follow up later.

v2: Keep all the copyright notices.
Reviewed-by: default avatarChris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: default avatarDaniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/20161114115825.22050-2-daniel.vetter@ffwll.ch
parent 196594ef
...@@ -15,7 +15,8 @@ drm-y := drm_auth.o drm_bufs.o drm_cache.o \ ...@@ -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_modeset_lock.o drm_atomic.o drm_bridge.o \
drm_framebuffer.o drm_connector.o drm_blend.o \ drm_framebuffer.o drm_connector.o drm_blend.o \
drm_encoder.o drm_mode_object.o drm_property.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_COMPAT) += drm_ioc32.o
drm-$(CONFIG_DRM_GEM_CMA_HELPER) += drm_gem_cma_helper.o drm-$(CONFIG_DRM_GEM_CMA_HELPER) += drm_gem_cma_helper.o
......
...@@ -968,115 +968,6 @@ void drm_mode_config_reset(struct drm_device *dev) ...@@ -968,115 +968,6 @@ void drm_mode_config_reset(struct drm_device *dev)
} }
EXPORT_SYMBOL(drm_mode_config_reset); 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 * drm_mode_config_init - initialize DRM mode_configuration structure
* @dev: DRM device * @dev: DRM device
......
...@@ -43,20 +43,22 @@ int drm_crtc_check_viewport(const struct drm_crtc *crtc, ...@@ -43,20 +43,22 @@ int drm_crtc_check_viewport(const struct drm_crtc *crtc,
void drm_fb_release(struct drm_file *file_priv); void drm_fb_release(struct drm_file *file_priv);
/* dumb buffer support IOCTLs */ /* IOCTLs */
int drm_mode_create_dumb_ioctl(struct drm_device *dev, int drm_mode_getresources(struct drm_device *dev,
void *data, struct drm_file *file_priv); void *data, struct drm_file *file_priv);
int drm_mode_mmap_dumb_ioctl(struct drm_device *dev, int drm_mode_getcrtc(struct drm_device *dev,
void *data, struct drm_file *file_priv); void *data, struct drm_file *file_priv);
int drm_mode_destroy_dumb_ioctl(struct drm_device *dev, int drm_mode_setcrtc(struct drm_device *dev,
void *data, struct drm_file *file_priv); void *data, struct drm_file *file_priv);
/* drm_dumb_buffers.c */
/* IOCTLs */ /* IOCTLs */
int drm_mode_getresources(struct drm_device *dev, int drm_mode_create_dumb_ioctl(struct drm_device *dev,
void *data, struct drm_file *file_priv); void *data, struct drm_file *file_priv);
int drm_mode_getcrtc(struct drm_device *dev, int drm_mode_mmap_dumb_ioctl(struct drm_device *dev,
void *data, struct drm_file *file_priv); void *data, struct drm_file *file_priv);
int drm_mode_setcrtc(struct drm_device *dev, int drm_mode_destroy_dumb_ioctl(struct drm_device *dev,
void *data, struct drm_file *file_priv); void *data, struct drm_file *file_priv);
/* drm_color_mgmt.c */ /* drm_color_mgmt.c */
......
/*
* 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);
}
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