ad33688fca
Set entry->virtual for sg maps, fixing ATI PCI/PCIE GART support. PR: kern/97056 Submitted by: Stanislav Sedov <ssedov@mbsd.msk.ru>
133 lines
3.3 KiB
C
133 lines
3.3 KiB
C
/* drm_scatter.h -- IOCTLs to manage scatter/gather memory -*- linux-c -*-
|
|
* Created: Mon Dec 18 23:20:54 2000 by gareth@valinux.com */
|
|
/*-
|
|
* Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
|
|
* All Rights Reserved.
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a
|
|
* copy of this software and associated documentation files (the "Software"),
|
|
* to deal in the Software without restriction, including without limitation
|
|
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
|
|
* and/or sell copies of the Software, and to permit persons to whom the
|
|
* Software is furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice (including the next
|
|
* paragraph) shall be included in all copies or substantial portions of the
|
|
* Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
|
|
* PRECISION INSIGHT AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
|
|
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
|
|
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
|
|
* DEALINGS IN THE SOFTWARE.
|
|
*
|
|
* Authors:
|
|
* Gareth Hughes <gareth@valinux.com>
|
|
* Eric Anholt <anholt@FreeBSD.org>
|
|
*
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#include "dev/drm/drmP.h"
|
|
|
|
#define DEBUG_SCATTER 0
|
|
|
|
void drm_sg_cleanup(drm_sg_mem_t *entry)
|
|
{
|
|
free((void *)entry->handle, M_DRM);
|
|
free(entry->busaddr, M_DRM);
|
|
free(entry, M_DRM);
|
|
}
|
|
|
|
int drm_sg_alloc(DRM_IOCTL_ARGS)
|
|
{
|
|
DRM_DEVICE;
|
|
drm_scatter_gather_t request;
|
|
drm_sg_mem_t *entry;
|
|
unsigned long pages;
|
|
int i;
|
|
|
|
DRM_DEBUG( "%s\n", __FUNCTION__ );
|
|
|
|
if ( dev->sg )
|
|
return EINVAL;
|
|
|
|
DRM_COPY_FROM_USER_IOCTL(request, (drm_scatter_gather_t *)data,
|
|
sizeof(request) );
|
|
|
|
entry = malloc(sizeof(*entry), M_DRM, M_WAITOK | M_ZERO);
|
|
if ( !entry )
|
|
return ENOMEM;
|
|
|
|
pages = round_page(request.size) / PAGE_SIZE;
|
|
DRM_DEBUG( "sg size=%ld pages=%ld\n", request.size, pages );
|
|
|
|
entry->pages = pages;
|
|
|
|
entry->busaddr = malloc(pages * sizeof(*entry->busaddr), M_DRM,
|
|
M_WAITOK | M_ZERO);
|
|
if ( !entry->busaddr ) {
|
|
drm_sg_cleanup(entry);
|
|
return ENOMEM;
|
|
}
|
|
|
|
entry->handle = (long)malloc(pages << PAGE_SHIFT, M_DRM,
|
|
M_WAITOK | M_ZERO);
|
|
if (entry->handle == 0) {
|
|
drm_sg_cleanup(entry);
|
|
return ENOMEM;
|
|
}
|
|
|
|
for (i = 0; i < pages; i++) {
|
|
entry->busaddr[i] = vtophys(entry->handle + i * PAGE_SIZE);
|
|
}
|
|
|
|
DRM_DEBUG( "sg alloc handle = %08lx\n", entry->handle );
|
|
|
|
entry->virtual = (void *)entry->handle;
|
|
request.handle = entry->handle;
|
|
|
|
DRM_COPY_TO_USER_IOCTL( (drm_scatter_gather_t *)data,
|
|
request,
|
|
sizeof(request) );
|
|
|
|
DRM_LOCK();
|
|
if (dev->sg) {
|
|
DRM_UNLOCK();
|
|
drm_sg_cleanup(entry);
|
|
return EINVAL;
|
|
}
|
|
dev->sg = entry;
|
|
DRM_UNLOCK();
|
|
|
|
return 0;
|
|
}
|
|
|
|
int drm_sg_free(DRM_IOCTL_ARGS)
|
|
{
|
|
DRM_DEVICE;
|
|
drm_scatter_gather_t request;
|
|
drm_sg_mem_t *entry;
|
|
|
|
DRM_COPY_FROM_USER_IOCTL( request, (drm_scatter_gather_t *)data,
|
|
sizeof(request) );
|
|
|
|
DRM_LOCK();
|
|
entry = dev->sg;
|
|
dev->sg = NULL;
|
|
DRM_UNLOCK();
|
|
|
|
if ( !entry || entry->handle != request.handle )
|
|
return EINVAL;
|
|
|
|
DRM_DEBUG( "sg free virtual = 0x%lx\n", entry->handle );
|
|
|
|
drm_sg_cleanup(entry);
|
|
|
|
return 0;
|
|
}
|