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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 <errno.h>
#include <assert.h>
#include "nouveau_drmif.h"
#include "nouveau_dma.h"
#define PB_RSVD_DWORDS 2
static int
nouveau_pushbuf_space(struct nouveau_channel *chan)
{
struct nouveau_channel_priv *nvchan = nouveau_channel(chan);
struct nouveau_pushbuf_priv *nvpb;
nvpb = calloc(1, sizeof(struct nouveau_pushbuf_priv));
if (!nvpb)
return -ENOMEM;
while (nouveau_resource_alloc(nvchan->pb_heap, 0x2100, NULL,
&nvpb->res)) {
nouveau_fence_flush(chan);
}
nvpb->base.channel = chan;
nvpb->base.remaining = (nvpb->res->size / 4) - PB_RSVD_DWORDS;
nvpb->base.cur = &nvchan->pushbuf[nvpb->res->start/4];
nvchan->pb_tail = &nvpb->base;
nvchan->base.pushbuf = nvchan->pb_tail;
return 0;
}
int
nouveau_pushbuf_init(struct nouveau_channel *chan)
{
struct nouveau_channel_priv *nvchan = nouveau_channel(chan);
if (!nvchan)
return -EINVAL;
/* Everything except first 4KiB of the push buffer is managed by us */
if (nouveau_resource_init(&nvchan->pb_heap, 4096,
nvchan->drm.cmdbuf_size - 4096))
return -EINVAL;
/* Shrink master ring to 4KiB */
assert(nvchan->dma.cur <= (4096/4));
nvchan->dma.max = (4096 / 4) - 2;
nvchan->dma.free = nvchan->dma.max - nvchan->dma.cur;
assert(!nouveau_pushbuf_space(chan));
return 0;
}
static void
nouveau_pushbuf_fence_signalled(void *priv)
{
struct nouveau_pushbuf_priv *nvpb = nouveau_pushbuf(priv);
nouveau_fence_del(&nvpb->fence);
nouveau_resource_free(&nvpb->res);
free(nvpb);
}
/* This would be our TTM "superioctl" */
int
nouveau_pushbuf_flush(struct nouveau_channel *chan)
{
struct nouveau_channel_priv *nvchan = nouveau_channel(chan);
struct nouveau_pushbuf_priv *nvpb = nouveau_pushbuf(chan->pushbuf);
struct nouveau_pushbuf_bo *pbbo;
struct nouveau_fence *fence = NULL;
int ret;
if (nvpb->base.remaining == (nvpb->res->size / 4) - PB_RSVD_DWORDS)
return 0;
nvchan->pb_tail = NULL;
ret = nouveau_fence_new(chan, &fence);
if (ret)
return ret;
/* Validate buffers + apply relocations */
while ((pbbo = ptr_to_pbbo(nvpb->buffers))) {
struct nouveau_pushbuf_reloc *r;
struct nouveau_bo *bo = &ptr_to_bo(pbbo->handle)->base;
ret = nouveau_bo_validate(chan, bo, fence, pbbo->flags);
assert (ret == 0);
while ((r = ptr_to_pbrel(pbbo->relocs))) {
uint32_t push;
if (r->flags & NOUVEAU_BO_LOW) {
push = bo->offset + r->data;
} else
if (r->flags & NOUVEAU_BO_HIGH) {
push = (bo->offset + r->data) >> 32;
} else {
push = r->data;
}
if (r->flags & NOUVEAU_BO_OR) {
if (bo->flags & NOUVEAU_BO_VRAM)
push |= r->vor;
else
push |= r->tor;
}
*r->ptr = push;
pbbo->relocs = r->next;
free(r);
}
nvpb->buffers = pbbo->next;
free(pbbo);
}
nvpb->nr_buffers = 0;
/* Emit JMP to indirect pushbuf */
RING_SPACE_CH(chan, 1);
OUT_RING_CH(chan, 0x20000000 | nvpb->res->start);
/* Add JMP back to master pushbuf from indirect pushbuf */
(*nvpb->base.cur++) =
0x20000000 | ((nvchan->dma.cur << 2) + nvchan->dma.base);
/* Fence */
nvpb->fence = fence;
nouveau_fence_signal_cb(nvpb->fence, nouveau_pushbuf_fence_signalled,
nvpb);
nouveau_fence_emit(nvpb->fence);
/* Kickoff */
FIRE_RING_CH(chan);
/* Allocate space for next push buffer */
assert(!nouveau_pushbuf_space(chan));
return 0;
}
static struct nouveau_pushbuf_bo *
nouveau_pushbuf_emit_buffer(struct nouveau_channel *chan, struct nouveau_bo *bo)
{
struct nouveau_channel_priv *nvchan = nouveau_channel(chan);
struct nouveau_pushbuf_priv *nvpb = nouveau_pushbuf(nvchan->pb_tail);
struct nouveau_pushbuf_bo *pbbo = ptr_to_pbbo(nvpb->buffers);
while (pbbo) {
if (pbbo->handle == bo->handle)
return pbbo;
pbbo = ptr_to_pbbo(pbbo->next);
}
pbbo = malloc(sizeof(struct nouveau_pushbuf_bo));
pbbo->next = nvpb->buffers;
nvpb->buffers = pbbo_to_ptr(pbbo);
nvpb->nr_buffers++;
pbbo->handle = bo_to_ptr(bo);
pbbo->flags = NOUVEAU_BO_VRAM | NOUVEAU_BO_GART;
pbbo->relocs = 0;
pbbo->nr_relocs = 0;
return pbbo;
}
int
nouveau_pushbuf_emit_reloc(struct nouveau_channel *chan, void *ptr,
struct nouveau_bo *bo, uint32_t data, uint32_t flags,
uint32_t vor, uint32_t tor)
{
struct nouveau_pushbuf_bo *pbbo;
struct nouveau_pushbuf_reloc *r;
if (!chan)
return -EINVAL;
pbbo = nouveau_pushbuf_emit_buffer(chan, bo);
if (!pbbo)
return -EFAULT;
r = malloc(sizeof(struct nouveau_pushbuf_reloc));
r->next = pbbo->relocs;
pbbo->relocs = pbrel_to_ptr(r);
pbbo->nr_relocs++;
pbbo->flags |= (flags & NOUVEAU_BO_RDWR);
pbbo->flags &= (flags | NOUVEAU_BO_RDWR);
r->handle = bo_to_ptr(r);
r->ptr = ptr;
r->flags = flags;
r->data = data;
r->vor = vor;
r->tor = tor;
return 0;
}
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