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/*
* Copyright 2010 Christoph Bumiller
*
* 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 "nvc0_fence.h"
#include "nvc0_context.h"
#include "nvc0_screen.h"
#ifdef PIPE_OS_UNIX
#include <sched.h>
#endif
boolean
nvc0_screen_fence_new(struct nvc0_screen *screen, struct nvc0_fence **fence,
boolean emit)
{
*fence = CALLOC_STRUCT(nvc0_fence);
if (!*fence)
return FALSE;
(*fence)->screen = screen;
pipe_reference_init(&(*fence)->reference, 1);
if (emit)
nvc0_fence_emit(*fence);
return TRUE;
}
void
nvc0_fence_emit(struct nvc0_fence *fence)
{
struct nvc0_screen *screen = fence->screen;
struct nouveau_channel *chan = screen->base.channel;
fence->sequence = ++screen->fence.sequence;
assert(!(fence->state & NVC0_FENCE_STATE_EMITTED));
BEGIN_RING(chan, RING_3D(QUERY_ADDRESS_HIGH), 4);
OUT_RELOCh(chan, screen->fence.bo, 0, NOUVEAU_BO_WR);
OUT_RELOCl(chan, screen->fence.bo, 0, NOUVEAU_BO_WR);
OUT_RING (chan, fence->sequence);
OUT_RING (chan, 0x1000f010);
pipe_reference(NULL, &fence->reference);
if (screen->fence.tail)
screen->fence.tail->next = fence;
else
screen->fence.head = fence;
screen->fence.tail = fence;
fence->state = NVC0_FENCE_STATE_EMITTED;
}
void
nvc0_fence_del(struct nvc0_fence *fence)
{
struct nvc0_fence *it;
struct nvc0_screen *screen = fence->screen;
if (fence->state == NVC0_FENCE_STATE_EMITTED) {
if (fence == screen->fence.head) {
screen->fence.head = fence->next;
if (!screen->fence.head)
screen->fence.tail = NULL;
} else {
for (it = screen->fence.head; it && it->next != fence; it = it->next);
it->next = fence->next;
if (screen->fence.tail == fence)
screen->fence.tail = it;
}
}
FREE(fence);
}
static void
nvc0_screen_fence_update(struct nvc0_screen *screen)
{
struct nvc0_fence *fence;
struct nvc0_fence *next = NULL;
uint32_t sequence = screen->fence.map[0];
if (screen->fence.sequence_ack == sequence)
return;
screen->fence.sequence_ack = sequence;
for (fence = screen->fence.head; fence; fence = next) {
next = fence->next;
sequence = fence->sequence;
fence->state = NVC0_FENCE_STATE_SIGNALLED;
if (fence->trigger.func)
fence->trigger.func(fence->trigger.arg);
nvc0_fence_reference(&fence, NULL);
if (sequence == screen->fence.sequence_ack)
break;
}
screen->fence.head = next;
if (!next)
screen->fence.tail = NULL;
}
boolean
nvc0_fence_wait(struct nvc0_fence *fence)
{
struct nvc0_screen *screen = fence->screen;
int spins = 0;
if (fence->state != NVC0_FENCE_STATE_EMITTED)
return TRUE;
do {
nvc0_screen_fence_update(screen);
if (fence->state == NVC0_FENCE_STATE_SIGNALLED)
return TRUE;
#ifdef PIPE_OS_UNIX
if ((spins & 7) == 7) /* spend a few cycles */
sched_yield();
#endif
} while (++spins < 10000);
return FALSE;
}
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