freebsd-nq/sys/dev/drm/drm_scatter.c
Robert Noland f00755f06b Rework memory allocation to allocate memory with different type names. This
will ease the identification of memory leaks as the OS will be able to track
allocations for us by malloc type.  vmstat -m will show all of the
allocations.

Convert the calls to drm_alloc() and friends, which are used in shared code
to static __inline__ while we are here.

Approved by:	jhb (mentor)
2008-10-13 18:03:27 +00:00

135 lines
3.4 KiB
C

/*-
* 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("$FreeBSD$");
/** @file drm_scatter.c
* Allocation of memory for scatter-gather mappings by the graphics chip.
*
* The memory allocated here is then made into an aperture in the card
* by drm_ati_pcigart_init().
*/
#include "dev/drm/drmP.h"
#define DEBUG_SCATTER 0
void drm_sg_cleanup(drm_sg_mem_t *entry)
{
free((void *)entry->handle, DRM_MEM_PAGES);
free(entry->busaddr, DRM_MEM_PAGES);
free(entry, DRM_MEM_SGLISTS);
}
int drm_sg_alloc(struct drm_device * dev, struct drm_scatter_gather * request)
{
drm_sg_mem_t *entry;
unsigned long pages;
int i;
if (dev->sg)
return EINVAL;
entry = malloc(sizeof(*entry), DRM_MEM_SGLISTS, 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), DRM_MEM_PAGES,
M_WAITOK | M_ZERO);
if (!entry->busaddr) {
drm_sg_cleanup(entry);
return ENOMEM;
}
entry->handle = (long)malloc(pages << PAGE_SHIFT, DRM_MEM_PAGES,
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_LOCK();
if (dev->sg) {
DRM_UNLOCK();
drm_sg_cleanup(entry);
return EINVAL;
}
dev->sg = entry;
DRM_UNLOCK();
return 0;
}
int drm_sg_alloc_ioctl(struct drm_device *dev, void *data,
struct drm_file *file_priv)
{
struct drm_scatter_gather *request = data;
int ret;
DRM_DEBUG("%s\n", __FUNCTION__);
ret = drm_sg_alloc(dev, request);
return ret;
}
int drm_sg_free(struct drm_device *dev, void *data, struct drm_file *file_priv)
{
struct drm_scatter_gather *request = data;
drm_sg_mem_t *entry;
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;
}