d1780e8dac
addresses offsets, as intended. Suggested and reviewed by: alc Sponsored by: The FreeBSD Foundation MFC after: 2 weeks
137 lines
3.6 KiB
C
137 lines
3.6 KiB
C
/*-
|
|
* Copyright (c) 2009 Robert C. Noland III <rnoland@FreeBSD.org>
|
|
* 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.
|
|
*/
|
|
|
|
#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 mapping the pages into the GART.
|
|
*/
|
|
|
|
#include <dev/drm2/drmP.h>
|
|
|
|
#define DEBUG_SCATTER 0
|
|
|
|
static inline vm_offset_t drm_vmalloc_dma(vm_size_t size)
|
|
{
|
|
return kmem_alloc_attr(kernel_arena, size, M_NOWAIT | M_ZERO,
|
|
0, BUS_SPACE_MAXADDR_32BIT, VM_MEMATTR_WRITE_COMBINING);
|
|
}
|
|
|
|
void drm_sg_cleanup(struct drm_sg_mem * entry)
|
|
{
|
|
if (entry == NULL)
|
|
return;
|
|
|
|
if (entry->vaddr != 0)
|
|
kmem_free(kernel_arena, entry->vaddr, IDX_TO_OFF(entry->pages));
|
|
|
|
free(entry->busaddr, DRM_MEM_SGLISTS);
|
|
free(entry, DRM_MEM_DRIVER);
|
|
}
|
|
|
|
int drm_sg_alloc(struct drm_device *dev, struct drm_scatter_gather * request)
|
|
{
|
|
struct drm_sg_mem *entry;
|
|
vm_size_t size;
|
|
vm_pindex_t pindex;
|
|
|
|
DRM_DEBUG("\n");
|
|
|
|
if (!drm_core_check_feature(dev, DRIVER_SG))
|
|
return -EINVAL;
|
|
|
|
if (dev->sg)
|
|
return -EINVAL;
|
|
|
|
entry = malloc(sizeof(*entry), DRM_MEM_DRIVER, M_NOWAIT | M_ZERO);
|
|
if (!entry)
|
|
return -ENOMEM;
|
|
|
|
DRM_DEBUG("request size=%ld\n", request->size);
|
|
|
|
size = round_page(request->size);
|
|
entry->pages = atop(size);
|
|
entry->busaddr = malloc(entry->pages * sizeof(*entry->busaddr),
|
|
DRM_MEM_SGLISTS, M_NOWAIT | M_ZERO);
|
|
if (!entry->busaddr) {
|
|
free(entry, DRM_MEM_DRIVER);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
entry->vaddr = drm_vmalloc_dma(size);
|
|
if (entry->vaddr == 0) {
|
|
free(entry->busaddr, DRM_MEM_DRIVER);
|
|
free(entry, DRM_MEM_DRIVER);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
for (pindex = 0; pindex < entry->pages; pindex++) {
|
|
entry->busaddr[pindex] =
|
|
vtophys(entry->vaddr + IDX_TO_OFF(pindex));
|
|
}
|
|
|
|
request->handle = entry->vaddr;
|
|
|
|
dev->sg = entry;
|
|
|
|
DRM_DEBUG("allocated %ju pages @ 0x%08zx, contents=%08lx\n",
|
|
entry->pages, entry->vaddr, *(unsigned long *)entry->vaddr);
|
|
|
|
return 0;
|
|
}
|
|
|
|
int drm_sg_alloc_ioctl(struct drm_device *dev, void *data,
|
|
struct drm_file *file_priv)
|
|
{
|
|
struct drm_scatter_gather *request = data;
|
|
|
|
return drm_sg_alloc(dev, request);
|
|
|
|
}
|
|
|
|
int drm_sg_free(struct drm_device *dev, void *data,
|
|
struct drm_file *file_priv)
|
|
{
|
|
struct drm_scatter_gather *request = data;
|
|
struct drm_sg_mem *entry;
|
|
|
|
if (!drm_core_check_feature(dev, DRIVER_SG))
|
|
return -EINVAL;
|
|
|
|
entry = dev->sg;
|
|
dev->sg = NULL;
|
|
|
|
if (!entry || entry->vaddr != request->handle)
|
|
return -EINVAL;
|
|
|
|
DRM_DEBUG("free 0x%zx\n", entry->vaddr);
|
|
|
|
drm_sg_cleanup(entry);
|
|
|
|
return 0;
|
|
}
|