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/*
* Copyright 2007 Nouveau Project
*
* 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 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
* THE AUTHORS 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 <stdlib.h>
#include <string.h>
#include <errno.h>
#include "nouveau_private.h"
int
nouveau_channel_alloc(struct nouveau_device *dev, uint32_t fb_ctxdma,
uint32_t tt_ctxdma, struct nouveau_channel **chan)
{
struct nouveau_device_priv *nvdev = nouveau_device(dev);
struct nouveau_channel_priv *nvchan;
unsigned i;
int ret;
if (!nvdev || !chan || *chan)
return -EINVAL;
nvchan = calloc(1, sizeof(struct nouveau_channel_priv));
if (!nvchan)
return -ENOMEM;
nvchan->base.device = dev;
nvchan->drm.fb_ctxdma_handle = fb_ctxdma;
nvchan->drm.tt_ctxdma_handle = tt_ctxdma;
ret = drmCommandWriteRead(nvdev->fd, DRM_NOUVEAU_CHANNEL_ALLOC,
&nvchan->drm, sizeof(nvchan->drm));
if (ret) {
free(nvchan);
return ret;
}
nvchan->base.id = nvchan->drm.channel;
if (nouveau_grobj_ref(&nvchan->base, nvchan->drm.fb_ctxdma_handle,
&nvchan->base.vram) ||
nouveau_grobj_ref(&nvchan->base, nvchan->drm.tt_ctxdma_handle,
&nvchan->base.gart)) {
nouveau_channel_free((void *)&nvchan);
return -EINVAL;
}
/* Mark all DRM-assigned subchannels as in-use */
for (i = 0; i < nvchan->drm.nr_subchan; i++) {
struct nouveau_grobj_priv *gr = calloc(1, sizeof(*gr));
gr->base.bound = NOUVEAU_GROBJ_BOUND_EXPLICIT;
gr->base.subc = i;
gr->base.handle = nvchan->drm.subchan[i].handle;
gr->base.grclass = nvchan->drm.subchan[i].grclass;
gr->base.channel = &nvchan->base;
nvchan->base.subc[i].gr = &gr->base;
}
ret = nouveau_bo_wrap(dev, nvchan->drm.notifier_handle,
&nvchan->notifier_bo);
if (!ret)
ret = nouveau_bo_map(nvchan->notifier_bo, NOUVEAU_BO_RDWR);
if (ret) {
nouveau_channel_free((void *)&nvchan);
return ret;
}
ret = nouveau_grobj_alloc(&nvchan->base, 0x00000000, 0x0030,
&nvchan->base.nullobj);
if (ret) {
nouveau_channel_free((void *)&nvchan);
return ret;
}
nouveau_pushbuf_init(&nvchan->base);
*chan = &nvchan->base;
return 0;
}
void
nouveau_channel_free(struct nouveau_channel **chan)
{
struct nouveau_channel_priv *nvchan;
struct nouveau_device_priv *nvdev;
struct drm_nouveau_channel_free cf;
int i;
if (!chan || !*chan)
return;
nvchan = nouveau_channel(*chan);
*chan = NULL;
nvdev = nouveau_device(nvchan->base.device);
FIRE_RING(&nvchan->base);
nouveau_pushbuf_fini(&nvchan->base);
nouveau_bo_unmap(nvchan->notifier_bo);
nouveau_bo_ref(NULL, &nvchan->notifier_bo);
for (i = 0; i < nvchan->drm.nr_subchan; i++)
free(nvchan->base.subc[i].gr);
nouveau_grobj_free(&nvchan->base.vram);
nouveau_grobj_free(&nvchan->base.gart);
nouveau_grobj_free(&nvchan->base.nullobj);
cf.channel = nvchan->drm.channel;
drmCommandWrite(nvdev->fd, DRM_NOUVEAU_CHANNEL_FREE, &cf, sizeof(cf));
free(nvchan);
}
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