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/*
* Copyright © 2013-2014 Intel Corporation
* Copyright © 2015 Advanced Micro Devices, Inc.
*
* 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.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "radeon.h"
#ifdef HAVE_DRI3_H
#include "radeon_bo_gem.h"
#include "radeon_glamor.h"
#include "dri3.h"
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <errno.h>
static int
radeon_dri3_open(ScreenPtr screen, RRProviderPtr provider, int *out)
{
ScrnInfoPtr scrn = xf86ScreenToScrn(screen);
RADEONInfoPtr info = RADEONPTR(scrn);
drm_magic_t magic;
int fd;
fd = open(info->dri2.device_name, O_RDWR | O_CLOEXEC);
if (fd < 0)
return BadAlloc;
/* Before FD passing in the X protocol with DRI3 (and increased
* security of rendering with per-process address spaces on the
* GPU), the kernel had to come up with a way to have the server
* decide which clients got to access the GPU, which was done by
* each client getting a unique (magic) number from the kernel,
* passing it to the server, and the server then telling the
* kernel which clients were authenticated for using the device.
*
* Now that we have FD passing, the server can just set up the
* authentication on its own and hand the prepared FD off to the
* client.
*/
if (drmGetMagic(fd, &magic) < 0) {
if (errno == EACCES) {
/* Assume that we're on a render node, and the fd is
* already as authenticated as it should be.
*/
*out = fd;
return Success;
} else {
close(fd);
return BadMatch;
}
}
if (drmAuthMagic(info->dri2.drm_fd, magic) < 0) {
close(fd);
return BadMatch;
}
*out = fd;
return Success;
}
static PixmapPtr radeon_dri3_pixmap_from_fd(ScreenPtr screen,
int fd,
CARD16 width,
CARD16 height,
CARD16 stride,
CARD8 depth,
CARD8 bpp)
{
PixmapPtr pixmap;
#ifdef USE_GLAMOR
/* Avoid generating a GEM flink name if possible */
if (RADEONPTR(xf86ScreenToScrn(screen))->use_glamor) {
pixmap = glamor_pixmap_from_fd(screen, fd, width, height,
stride, depth, bpp);
if (pixmap)
return pixmap;
}
#endif
if (depth < 8)
return NULL;
switch (bpp) {
case 8:
case 16:
case 32:
break;
default:
return NULL;
}
pixmap = screen->CreatePixmap(screen, 0, 0, depth, 0);
if (!pixmap)
return NULL;
if (!screen->ModifyPixmapHeader(pixmap, width, height, 0, bpp, stride,
NULL))
goto free_pixmap;
if (screen->SetSharedPixmapBacking(pixmap, (void*)(intptr_t)fd))
return pixmap;
free_pixmap:
fbDestroyPixmap(pixmap);
return NULL;
}
static int radeon_dri3_fd_from_pixmap(ScreenPtr screen,
PixmapPtr pixmap,
CARD16 *stride,
CARD32 *size)
{
struct radeon_bo *bo;
int fd;
bo = radeon_get_pixmap_bo(pixmap);
if (!bo) {
#ifdef USE_GLAMOR
ScrnInfoPtr scrn = xf86ScreenToScrn(screen);
RADEONInfoPtr info = RADEONPTR(scrn);
if (info->use_glamor)
return glamor_fd_from_pixmap(screen, pixmap, stride, size);
#endif
exaMoveInPixmap(pixmap);
bo = radeon_get_pixmap_bo(pixmap);
if (!bo)
return -1;
}
if (pixmap->devKind > UINT16_MAX)
return -1;
if (radeon_gem_prime_share_bo(bo, &fd) < 0)
return -1;
*stride = pixmap->devKind;
*size = bo->size;
return fd;
}
static dri3_screen_info_rec radeon_dri3_screen_info = {
.version = 0,
.open = radeon_dri3_open,
.pixmap_from_fd = radeon_dri3_pixmap_from_fd,
.fd_from_pixmap = radeon_dri3_fd_from_pixmap
};
Bool
radeon_dri3_screen_init(ScreenPtr screen)
{
ScrnInfoPtr scrn = xf86ScreenToScrn(screen);
if (!dri3_screen_init(screen, &radeon_dri3_screen_info)) {
xf86DrvMsg(scrn->scrnIndex, X_WARNING,
"dri3_screen_init failed\n");
return FALSE;
}
return TRUE;
}
#else /* !HAVE_DRI3_H */
Bool
radeon_dri3_screen_init(ScreenPtr screen)
{
xf86DrvMsg(xf86ScreenToScrn(screen)->scrnIndex, X_INFO,
"Can't initialize DRI3 because dri3.h not available at "
"build time\n");
return FALSE;
}
#endif
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