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freedreno/a4xx: occlusion query support

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Signed-off-by: Rob Clark <robclark@freedesktop.org>
This commit is contained in:
Rob Clark 2015-07-02 18:07:27 -04:00
parent 2b7a54452f
commit 15d3524ad2
1 changed files with 85 additions and 1 deletions
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86
src/gallium/drivers/freedreno/a4xx/fd4_query.c
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@ -31,9 +31,93 @@
#include "freedreno_util.h"
#include "fd4_query.h"
#include "fd4_draw.h"
#include "fd4_format.h"
struct fd_rb_samp_ctrs {
uint64_t ctr[16];
};
/*
* Occlusion Query:
*
* OCCLUSION_COUNTER and OCCLUSION_PREDICATE differ only in how they
* interpret results
*/
static struct fd_hw_sample *
occlusion_get_sample(struct fd_context *ctx, struct fd_ringbuffer *ring)
{
struct fd_hw_sample *samp =
fd_hw_sample_init(ctx, sizeof(struct fd_rb_samp_ctrs));
/* low bits of sample addr should be zero (since they are control
* flags in RB_SAMPLE_COUNT_CONTROL):
*/
debug_assert((samp->offset & 0x3) == 0);
/* Set RB_SAMPLE_COUNT_ADDR to samp->offset plus value of
* HW_QUERY_BASE_REG register:
*/
OUT_PKT3(ring, CP_SET_CONSTANT, 3);
OUT_RING(ring, CP_REG(REG_A4XX_RB_SAMPLE_COUNT_CONTROL) | 0x80000000);
OUT_RING(ring, HW_QUERY_BASE_REG);
OUT_RING(ring, A4XX_RB_SAMPLE_COUNT_CONTROL_COPY |
samp->offset);
OUT_PKT3(ring, CP_DRAW_INDX_OFFSET, 3);
OUT_RING(ring, DRAW4(DI_PT_POINTLIST_PSIZE, DI_SRC_SEL_AUTO_INDEX,
INDEX4_SIZE_32_BIT, USE_VISIBILITY));
OUT_RING(ring, 1); /* NumInstances */
OUT_RING(ring, 0); /* NumIndices */
fd_event_write(ctx, ring, ZPASS_DONE);
return samp;
}
static uint64_t
count_samples(const struct fd_rb_samp_ctrs *start,
const struct fd_rb_samp_ctrs *end)
{
return end->ctr[0] - start->ctr[0];
}
static void
occlusion_counter_accumulate_result(struct fd_context *ctx,
const void *start, const void *end,
union pipe_query_result *result)
{
uint64_t n = count_samples(start, end);
result->u64 += n;
}
static void
occlusion_predicate_accumulate_result(struct fd_context *ctx,
const void *start, const void *end,
union pipe_query_result *result)
{
uint64_t n = count_samples(start, end);
result->b |= (n > 0);
}
static const struct fd_hw_sample_provider occlusion_counter = {
.query_type = PIPE_QUERY_OCCLUSION_COUNTER,
.active = FD_STAGE_DRAW,
.get_sample = occlusion_get_sample,
.accumulate_result = occlusion_counter_accumulate_result,
};
static const struct fd_hw_sample_provider occlusion_predicate = {
.query_type = PIPE_QUERY_OCCLUSION_PREDICATE,
.active = FD_STAGE_DRAW,
.get_sample = occlusion_get_sample,
.accumulate_result = occlusion_predicate_accumulate_result,
};
void fd4_query_context_init(struct pipe_context *pctx)
{
/* TODO */
fd_hw_query_register_provider(pctx, &occlusion_counter);
fd_hw_query_register_provider(pctx, &occlusion_predicate);
}