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zink: only wait on last write-batch for resources during transfer_map

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if we need to sync a resource for read-only mapping, we only need to wait on
the fence that was last flagged as having writes to the resource, not batches
that may have reads, as reads don't affect memory coherency

Reviewed-by: Dave Airlie <airlied@redhat.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/9146>
This commit is contained in:
Mike Blumenkrantz 2020-09-04 12:08:18 -04:00
parent 16792ccaa1
commit 07df65d45f
1 changed files with 37 additions and 9 deletions
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46
src/gallium/drivers/zink/zink_resource.c
View file

@ -46,6 +46,26 @@
#include "drm-uapi/drm_fourcc.h"
#endif
static void
resource_sync_writes_from_batch_id(struct zink_context *ctx, uint32_t batch_uses, unsigned cur_batch)
{
if (batch_uses & ZINK_RESOURCE_ACCESS_WRITE << ZINK_COMPUTE_BATCH_ID)
zink_wait_on_batch(ctx, ZINK_COMPUTE_BATCH_ID);
batch_uses &= ~(ZINK_RESOURCE_ACCESS_WRITE << ZINK_COMPUTE_BATCH_ID);
if (!batch_uses)
return;
for (unsigned i = 0; i < ZINK_NUM_BATCHES + 1; i++) {
/* loop backwards and sync with highest batch id that has writes */
if (batch_uses & (ZINK_RESOURCE_ACCESS_WRITE << cur_batch)) {
zink_wait_on_batch(ctx, cur_batch);
break;
}
cur_batch--;
if (cur_batch > ZINK_COMPUTE_BATCH_ID - 1) // underflowed past max batch id
cur_batch = ZINK_COMPUTE_BATCH_ID - 1;
}
}
static void
zink_resource_destroy(struct pipe_screen *pscreen,
struct pipe_resource *pres)
@ -549,15 +569,18 @@ zink_transfer_map(struct pipe_context *pctx,
void *ptr;
if (pres->target == PIPE_BUFFER) {
if (!(usage & PIPE_MAP_UNSYNCHRONIZED) && util_ranges_intersect(&res->valid_buffer_range, box->x, box->x + box->width)) {
if ((usage & PIPE_MAP_READ && batch_uses >= ZINK_RESOURCE_ACCESS_WRITE) ||
(usage & PIPE_MAP_WRITE && batch_uses)) {
/* need to wait for rendering to finish
/* special case compute reads since they aren't handled by zink_fence_wait() */
if (usage & PIPE_MAP_WRITE && (batch_uses & (ZINK_RESOURCE_ACCESS_READ << ZINK_COMPUTE_BATCH_ID)))
zink_wait_on_batch(ctx, ZINK_COMPUTE_BATCH_ID);
batch_uses &= ~(ZINK_RESOURCE_ACCESS_READ << ZINK_COMPUTE_BATCH_ID);
if (usage & PIPE_MAP_READ && batch_uses >= ZINK_RESOURCE_ACCESS_WRITE)
resource_sync_writes_from_batch_id(ctx, batch_uses, zink_curr_batch(ctx)->batch_id);
else if (usage & PIPE_MAP_WRITE && batch_uses) {
/* need to wait for all rendering to finish
* TODO: optimize/fix this to be much less obtrusive
* mesa/mesa#2966
*/
if (batch_uses & ((ZINK_RESOURCE_ACCESS_READ << ZINK_COMPUTE_BATCH_ID) |
ZINK_RESOURCE_ACCESS_WRITE << ZINK_COMPUTE_BATCH_ID))
zink_wait_on_batch(ctx, ZINK_COMPUTE_BATCH_ID);
zink_fence_wait(pctx);
}
}
@ -643,10 +666,15 @@ zink_transfer_map(struct pipe_context *pctx,
} else {
assert(!res->optimal_tiling);
/* special case compute reads since they aren't handled by zink_fence_wait() */
if (batch_uses & (ZINK_RESOURCE_ACCESS_READ << ZINK_COMPUTE_BATCH_ID))
zink_wait_on_batch(ctx, ZINK_COMPUTE_BATCH_ID);
batch_uses &= ~(ZINK_RESOURCE_ACCESS_READ << ZINK_COMPUTE_BATCH_ID);
if (batch_uses >= ZINK_RESOURCE_ACCESS_WRITE) {
if (batch_uses & (ZINK_RESOURCE_ACCESS_WRITE << ZINK_COMPUTE_BATCH_ID))
zink_wait_on_batch(ctx, ZINK_COMPUTE_BATCH_ID);
zink_fence_wait(pctx);
if (usage & PIPE_MAP_READ)
resource_sync_writes_from_batch_id(ctx, batch_uses, zink_curr_batch(ctx)->batch_id);
else
zink_fence_wait(pctx);
}
VkResult result = vkMapMemory(screen->dev, res->mem, res->offset, res->size, 0, &ptr);
if (result != VK_SUCCESS)