/*
* Copyright © 2008 Intel Corporation
*
* 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 (including the next
* paragraph) 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 OR COPYRIGHT HOLDERS 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.
*
* Authors:
* Eric Anholt <eric@anholt.net>
*
*/
/** @file support for ARB_query_object
*
* ARB_query_object is implemented by using the PIPE_CONTROL command to stall
* execution on the completion of previous depth tests, and write the
* current PS_DEPTH_COUNT to a buffer object.
*
* We use before and after counts when drawing during a query so that
* we don't pick up other clients' query data in ours. To reduce overhead,
* a single BO is used to record the query data for all active queries at
* once. This also gives us a simple bound on how much batchbuffer space is
* required for handling queries, so that we can be sure that we won't
* have to emit a batchbuffer without getting the ending PS_DEPTH_COUNT.
*/
#include "main/imports.h"
#include "brw_context.h"
#include "brw_state.h"
#include "intel_batchbuffer.h"
#include "intel_reg.h"
/** Waits on the query object's BO and totals the results for this query */
static void
brw_queryobj_get_results(struct brw_query_object *query)
{
int i;
uint64_t *results;
if (query->bo == NULL)
return;
drm_intel_bo_map(query->bo, GL_FALSE);
results = query->bo->virtual;
if (query->Base.Target == GL_TIME_ELAPSED_EXT) {
query->Base.Result += 1000 * ((results[1] >> 32) - (results[0] >> 32));
} else {
/* Map and count the pixels from the current query BO */
for (i = query->first_index; i <= query->last_index; i++) {
query->Base.Result += results[i * 2 + 1] - results[i * 2];
}
}
drm_intel_bo_unmap(query->bo);
drm_intel_bo_unreference(query->bo);
query->bo = NULL;
}
static struct gl_query_object *
brw_new_query_object(struct gl_context *ctx, GLuint id)
{
struct brw_query_object *query;
query = calloc(1, sizeof(struct brw_query_object));
query->Base.Id = id;
query->Base.Result = 0;
query->Base.Active = GL_FALSE;
query->Base.Ready = GL_TRUE;
return &query->Base;
}
static void
brw_delete_query(struct gl_context *ctx, struct gl_query_object *q)
{
struct brw_query_object *query = (struct brw_query_object *)q;
drm_intel_bo_unreference(query->bo);
free(query);
}
static void
brw_begin_query(struct gl_context *ctx, struct gl_query_object *q)
{
struct brw_context *brw = brw_context(ctx);
struct intel_context *intel = intel_context(ctx);
struct brw_query_object *query = (struct brw_query_object *)q;
if (query->Base.Target == GL_TIME_ELAPSED_EXT) {
drm_intel_bo_unreference(query->bo);
query->bo = drm_intel_bo_alloc(intel->bufmgr, "timer query",
4096, 4096);
if (intel->gen >= 6) {
BEGIN_BATCH(4);
OUT_BATCH(_3DSTATE_PIPE_CONTROL);
OUT_BATCH(PIPE_CONTROL_WRITE_TIMESTAMP);
OUT_RELOC(query->bo,
I915_GEM_DOMAIN_INSTRUCTION, I915_GEM_DOMAIN_INSTRUCTION,
PIPE_CONTROL_GLOBAL_GTT_WRITE |
0);
OUT_BATCH(0);
ADVANCE_BATCH();
} else {
BEGIN_BATCH(4);
OUT_BATCH(_3DSTATE_PIPE_CONTROL |
PIPE_CONTROL_WRITE_TIMESTAMP);
OUT_RELOC(query->bo,
I915_GEM_DOMAIN_INSTRUCTION, I915_GEM_DOMAIN_INSTRUCTION,
PIPE_CONTROL_GLOBAL_GTT_WRITE |
0);
OUT_BATCH(0);
OUT_BATCH(0);
ADVANCE_BATCH();
}
} else {
/* Reset our driver's tracking of query state. */
drm_intel_bo_unreference(query->bo);
query->bo = NULL;
query->first_index = -1;
query->last_index = -1;
brw->query.obj = query;
intel->stats_wm++;
}
}
/**
* Begin the ARB_occlusion_query query on a query object.
*/
static void
brw_end_query(struct gl_context *ctx, struct gl_query_object *q)
{
struct brw_context *brw = brw_context(ctx);
struct intel_context *intel = intel_context(ctx);
struct brw_query_object *query = (struct brw_query_object *)q;
if (query->Base.Target == GL_TIME_ELAPSED_EXT) {
if (intel->gen >= 6) {
BEGIN_BATCH(4);
OUT_BATCH(_3DSTATE_PIPE_CONTROL);
OUT_BATCH(PIPE_CONTROL_WRITE_TIMESTAMP);
OUT_RELOC(query->bo,
I915_GEM_DOMAIN_INSTRUCTION, I915_GEM_DOMAIN_INSTRUCTION,
PIPE_CONTROL_GLOBAL_GTT_WRITE |
8);
OUT_BATCH(0);
ADVANCE_BATCH();
} else {
BEGIN_BATCH(4);
OUT_BATCH(_3DSTATE_PIPE_CONTROL |
PIPE_CONTROL_WRITE_TIMESTAMP);
OUT_RELOC(query->bo,
I915_GEM_DOMAIN_INSTRUCTION, I915_GEM_DOMAIN_INSTRUCTION,
PIPE_CONTROL_GLOBAL_GTT_WRITE |
8);
OUT_BATCH(0);
OUT_BATCH(0);
ADVANCE_BATCH();
}
intel_batchbuffer_flush(intel->batch);
} else {
/* Flush the batchbuffer in case it has writes to our query BO.
* Have later queries write to a new query BO so that further rendering
* doesn't delay the collection of our results.
*/
if (query->bo) {
brw_emit_query_end(brw);
intel_batchbuffer_flush(intel->batch);
drm_intel_bo_unreference(brw->query.bo);
brw->query.bo = NULL;
}
brw->query.obj = NULL;
intel->stats_wm--;
}
}
static void brw_wait_query(struct gl_context *ctx, struct gl_query_object *q)
{
struct brw_query_object *query = (struct brw_query_object *)q;
brw_queryobj_get_results(query);
query->Base.Ready = GL_TRUE;
}
static void brw_check_query(struct gl_context *ctx, struct gl_query_object *q)
{
struct brw_query_object *query = (struct brw_query_object *)q;
if (query->bo == NULL || !drm_intel_bo_busy(query->bo)) {
brw_queryobj_get_results(query);
query->Base.Ready = GL_TRUE;
}
}
/** Called to set up the query BO and account for its aperture space */
void
brw_prepare_query_begin(struct brw_context *brw)
{
struct intel_context *intel = &brw->intel;
/* Skip if we're not doing any queries. */
if (!brw->query.obj)
return;
/* Get a new query BO if we're going to need it. */
if (brw->query.bo == NULL ||
brw->query.index * 2 + 1 >= 4096 / sizeof(uint64_t)) {
drm_intel_bo_unreference(brw->query.bo);
brw->query.bo = NULL;
brw->query.bo = drm_intel_bo_alloc(intel->bufmgr, "query", 4096, 1);
/* clear target buffer */
drm_intel_bo_map(brw->query.bo, GL_TRUE);
memset((char *)brw->query.bo->virtual, 0, 4096);
drm_intel_bo_unmap(brw->query.bo);
brw->query.index = 0;
}
brw_add_validated_bo(brw, brw->query.bo);
}
/** Called just before primitive drawing to get a beginning PS_DEPTH_COUNT. */
void
brw_emit_query_begin(struct brw_context *brw)
{
struct intel_context *intel = &brw->intel;
struct brw_query_object *query = brw->query.obj;
/* Skip if we're not doing any queries, or we've emitted the start. */
if (!query || brw->query.active)
return;
if (intel->gen >= 6) {
BEGIN_BATCH(8);
/* workaround: CS stall required before depth stall. */
OUT_BATCH(_3DSTATE_PIPE_CONTROL);
OUT_BATCH(PIPE_CONTROL_CS_STALL);
OUT_BATCH(0); /* write address */
OUT_BATCH(0); /* write data */
OUT_BATCH(_3DSTATE_PIPE_CONTROL);
OUT_BATCH(PIPE_CONTROL_DEPTH_STALL |
PIPE_CONTROL_WRITE_DEPTH_COUNT);
OUT_RELOC(brw->query.bo,
I915_GEM_DOMAIN_INSTRUCTION, I915_GEM_DOMAIN_INSTRUCTION,
PIPE_CONTROL_GLOBAL_GTT_WRITE |
((brw->query.index * 2) * sizeof(uint64_t)));
OUT_BATCH(0);
ADVANCE_BATCH();
} else {
BEGIN_BATCH(4);
OUT_BATCH(_3DSTATE_PIPE_CONTROL |
PIPE_CONTROL_DEPTH_STALL |
PIPE_CONTROL_WRITE_DEPTH_COUNT);
/* This object could be mapped cacheable, but we don't have an exposed
* mechanism to support that. Since it's going uncached, tell GEM that
* we're writing to it. The usual clflush should be all that's required
* to pick up the results.
*/
OUT_RELOC(brw->query.bo,
I915_GEM_DOMAIN_INSTRUCTION, I915_GEM_DOMAIN_INSTRUCTION,
PIPE_CONTROL_GLOBAL_GTT_WRITE |
((brw->query.index * 2) * sizeof(uint64_t)));
OUT_BATCH(0);
OUT_BATCH(0);
ADVANCE_BATCH();
}
if (query->bo != brw->query.bo) {
if (query->bo != NULL)
brw_queryobj_get_results(query);
drm_intel_bo_reference(brw->query.bo);
query->bo = brw->query.bo;
query->first_index = brw->query.index;
}
query->last_index = brw->query.index;
brw->query.active = GL_TRUE;
}
/** Called at batchbuffer flush to get an ending PS_DEPTH_COUNT */
void
brw_emit_query_end(struct brw_context *brw)
{
struct intel_context *intel = &brw->intel;
if (!brw->query.active)
return;
if (intel->gen >= 6) {
BEGIN_BATCH(8);
/* workaround: CS stall required before depth stall. */
OUT_BATCH(_3DSTATE_PIPE_CONTROL);
OUT_BATCH(PIPE_CONTROL_CS_STALL);
OUT_BATCH(0); /* write address */
OUT_BATCH(0); /* write data */
OUT_BATCH(_3DSTATE_PIPE_CONTROL);
OUT_BATCH(PIPE_CONTROL_DEPTH_STALL |
PIPE_CONTROL_WRITE_DEPTH_COUNT);
OUT_RELOC(brw->query.bo,
I915_GEM_DOMAIN_INSTRUCTION, I915_GEM_DOMAIN_INSTRUCTION,
PIPE_CONTROL_GLOBAL_GTT_WRITE |
((brw->query.index * 2 + 1) * sizeof(uint64_t)));
OUT_BATCH(0);
ADVANCE_BATCH();
} else {
BEGIN_BATCH(4);
OUT_BATCH(_3DSTATE_PIPE_CONTROL |
PIPE_CONTROL_DEPTH_STALL |
PIPE_CONTROL_WRITE_DEPTH_COUNT);
OUT_RELOC(brw->query.bo,
I915_GEM_DOMAIN_INSTRUCTION, I915_GEM_DOMAIN_INSTRUCTION,
PIPE_CONTROL_GLOBAL_GTT_WRITE |
((brw->query.index * 2 + 1) * sizeof(uint64_t)));
OUT_BATCH(0);
OUT_BATCH(0);
ADVANCE_BATCH();
}
brw->query.active = GL_FALSE;
brw->query.index++;
}
void brw_init_queryobj_functions(struct dd_function_table *functions)
{
functions->NewQueryObject = brw_new_query_object;
functions->DeleteQuery = brw_delete_query;
functions->BeginQuery = brw_begin_query;
functions->EndQuery = brw_end_query;
functions->CheckQuery = brw_check_query;
functions->WaitQuery = brw_wait_query;
}