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zink: implement a tc is_resource_busy hook

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this is kinda gross for now, but it gets the job done

Reviewed-by: Dave Airlie <airlied@redhat.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/10882>
This commit is contained in:
Mike Blumenkrantz 2021-05-19 09:51:17 -04:00
parent 517484ea89
commit 0c1fe392e8
1 changed files with 43 additions and 1 deletions
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44
src/gallium/drivers/zink/zink_context.c
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@ -2972,6 +2972,47 @@ zink_context_replace_buffer_storage(struct pipe_context *pctx, struct pipe_resou
zink_resource_rebind(zink_context(pctx), d);
}
static bool
zink_context_is_resource_busy(struct pipe_screen *pscreen, struct pipe_resource *pres, unsigned usage)
{
struct zink_screen *screen = zink_screen(pscreen);
struct zink_resource *res = zink_resource(pres);
uint32_t reads = 0, writes = 0;
if (((usage & (PIPE_MAP_READ | PIPE_MAP_WRITE)) == (PIPE_MAP_READ | PIPE_MAP_WRITE)) ||
usage & PIPE_MAP_WRITE) {
reads = p_atomic_read(&res->obj->reads.usage);
writes = p_atomic_read(&res->obj->writes.usage);
} else if (usage & PIPE_MAP_READ)
writes = p_atomic_read(&res->obj->writes.usage);
/* get latest usage accounting for 32bit int rollover:
* a rollover is detected if there are reads and writes,
* but one of the values is over UINT32_MAX/2 while the other is under,
* as it is impossible for this many unflushed batch states to ever
* exist at any given time
*/
uint32_t last;
if (reads && writes)
last = abs(reads - writes) > UINT32_MAX / 2 ? MIN2(reads, writes) : MAX2(reads, writes);
else
last = reads ? reads : writes;
if (!last)
return false;
/* check fastpath first */
if (zink_screen_check_last_finished(screen, last))
return false;
/* if we have timelines, do a quick check */
if (screen->info.have_KHR_timeline_semaphore)
return !zink_screen_timeline_wait(screen, last, 0);
/* otherwise assume busy */
return true;
}
struct pipe_context *
zink_context_create(struct pipe_screen *pscreen, void *priv, unsigned flags)
{
@ -3139,7 +3180,8 @@ zink_context_create(struct pipe_screen *pscreen, void *priv, unsigned flags)
struct threaded_context *tc = (struct threaded_context*)threaded_context_create(&ctx->base, &screen->transfer_pool,
zink_context_replace_buffer_storage,
zink_create_tc_fence_for_tc, NULL, false, &ctx->tc);
zink_create_tc_fence_for_tc,
zink_context_is_resource_busy, false, &ctx->tc);
if (tc && (struct zink_context*)tc != ctx) {
tc->bytes_mapped_limit = screen->total_mem / 4;