static void
write_depth_count(struct intel_context *intel, drm_intel_bo *query_bo, int idx)
{
- if (intel->gen >= 6) {
- /* Emit Sandybridge workaround flush: */
- if (intel->gen == 6)
- intel_emit_post_sync_nonzero_flush(intel);
-
- BEGIN_BATCH(5);
- OUT_BATCH(_3DSTATE_PIPE_CONTROL | (5 - 2));
- OUT_BATCH(PIPE_CONTROL_DEPTH_STALL |
- PIPE_CONTROL_WRITE_DEPTH_COUNT);
- OUT_RELOC(query_bo,
- I915_GEM_DOMAIN_INSTRUCTION, I915_GEM_DOMAIN_INSTRUCTION,
- PIPE_CONTROL_GLOBAL_GTT_WRITE |
- (idx * sizeof(uint64_t)));
- OUT_BATCH(0);
- OUT_BATCH(0);
- ADVANCE_BATCH();
- } else {
- BEGIN_BATCH(4);
- OUT_BATCH(_3DSTATE_PIPE_CONTROL | (4 - 2) |
- 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(query_bo,
- I915_GEM_DOMAIN_INSTRUCTION, I915_GEM_DOMAIN_INSTRUCTION,
- PIPE_CONTROL_GLOBAL_GTT_WRITE |
- (idx * sizeof(uint64_t)));
- OUT_BATCH(0);
- OUT_BATCH(0);
- ADVANCE_BATCH();
- }
+ assert(intel->gen < 6);
+
+ BEGIN_BATCH(4);
+ OUT_BATCH(_3DSTATE_PIPE_CONTROL | (4 - 2) |
+ 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(query_bo,
+ I915_GEM_DOMAIN_INSTRUCTION, I915_GEM_DOMAIN_INSTRUCTION,
+ PIPE_CONTROL_GLOBAL_GTT_WRITE |
+ (idx * sizeof(uint64_t)));
+ OUT_BATCH(0);
+ OUT_BATCH(0);
+ ADVANCE_BATCH();
}
/**
int i;
uint64_t *results;
+ assert(intel->gen < 6);
+
if (query->bo == NULL)
return;
/* The query BO contains the starting and ending timestamps.
* Subtract the two and convert to nanoseconds.
*/
- if (intel->gen >= 6)
- query->Base.Result += 80 * (results[1] - results[0]);
- else
- query->Base.Result += 1000 * ((results[1] >> 32) - (results[0] >> 32));
+ query->Base.Result += 1000 * ((results[1] >> 32) - (results[0] >> 32));
break;
case GL_TIMESTAMP:
/* The query BO contains a single timestamp value in results[0]. */
- if (intel->gen >= 6) {
- /* Our timer is a clock that increments every 80ns (regardless of
- * other clock scaling in the system). The timestamp register we can
- * read for glGetTimestamp() masks out the top 32 bits, so we do that
- * here too to let the two counters be compared against each other.
- *
- * If we just multiplied that 32 bits of data by 80, it would roll
- * over at a non-power-of-two, so an application couldn't use
- * GL_QUERY_COUNTER_BITS to handle rollover correctly. Instead, we
- * report 36 bits and truncate at that (rolling over 5 times as often
- * as the HW counter), and when the 32-bit counter rolls over, it
- * happens to also be at a rollover in the reported value from near
- * (1<<36) to 0.
- *
- * The low 32 bits rolls over in ~343 seconds. Our 36-bit result
- * rolls over every ~69 seconds.
- */
- query->Base.Result = 80 * (results[0] & 0xffffffff);
- query->Base.Result &= (1ull << 36) - 1;
- } else {
- query->Base.Result = 1000 * (results[0] >> 32);
- }
+ query->Base.Result = 1000 * (results[0] >> 32);
break;
case GL_SAMPLES_PASSED_ARB:
}
/**
- * Driver hook for glBeginQuery().
+ * Gen4-5 driver hook for glBeginQuery().
*
* Initializes driver structures and emits any GPU commands required to begin
* recording data for the query.
struct intel_context *intel = intel_context(ctx);
struct brw_query_object *query = (struct brw_query_object *)q;
+ assert(intel->gen < 6);
+
switch (query->Base.Target) {
case GL_TIME_ELAPSED_EXT:
/* For timestamp queries, we record the starting time right away so that
}
/**
- * Driver hook for glEndQuery().
+ * Gen4-5 driver hook for glEndQuery().
*
* Emits GPU commands to record a final query value, ending any data capturing.
* However, the final result isn't necessarily available until the GPU processes
struct intel_context *intel = intel_context(ctx);
struct brw_query_object *query = (struct brw_query_object *)q;
+ assert(intel->gen < 6);
+
switch (query->Base.Target) {
case GL_TIME_ELAPSED_EXT:
/* Write the final timestamp. */
}
/**
- * The WaitQuery() driver hook.
+ * The Gen4-5 WaitQuery() driver hook.
*
* Wait for a query result to become available and return it. This is the
* backing for glGetQueryObjectiv() with the GL_QUERY_RESULT pname.
{
struct brw_query_object *query = (struct brw_query_object *)q;
+ assert(intel_context(ctx)->gen < 6);
+
brw_queryobj_get_results(ctx, query);
query->Base.Ready = true;
}
/**
- * The CheckQuery() driver hook.
+ * The Gen4-5 CheckQuery() driver hook.
*
* Checks whether a query result is ready yet. If not, flushes.
* This is the backing for glGetQueryObjectiv()'s QUERY_RESULT_AVAILABLE pname.
struct intel_context *intel = intel_context(ctx);
struct brw_query_object *query = (struct brw_query_object *)q;
+ assert(intel->gen < 6);
+
/* From the GL_ARB_occlusion_query spec:
*
* "Instead of allowing for an infinite loop, performing a
{
struct intel_context *intel = intel_context(ctx);
+ assert(intel->gen < 6);
+
if (!query->bo || query->last_index * 2 + 1 >= 4096 / sizeof(uint64_t)) {
if (query->bo != NULL) {
* produces the final expected value.
*
* In a world with hardware contexts, PS_DEPTH_COUNT is saved and restored
- * as part of the context state, so this is unnecessary. We could simply
- * read two values and subtract them. However, it's safe to continue using
- * the old approach.
+ * as part of the context state, so this is unnecessary, and skipped.
*/
void
brw_emit_query_begin(struct brw_context *brw)
struct gl_context *ctx = &intel->ctx;
struct brw_query_object *query = brw->query.obj;
+ if (intel->hw_ctx)
+ return;
+
/* Skip if we're not doing any queries, or we've already recorded the
* initial query value for this batchbuffer.
*/
}
/**
- * Called at batchbuffer flush to get an ending PS_DEPTH_COUNT.
+ * Called at batchbuffer flush to get an ending PS_DEPTH_COUNT
+ * (for non-hardware context platforms).
*
* See the explanation in brw_emit_query_begin().
*/
struct intel_context *intel = &brw->intel;
struct brw_query_object *query = brw->query.obj;
+ if (intel->hw_ctx)
+ return;
+
if (!brw->query.begin_emitted)
return;
return result;
}
-void brw_init_queryobj_functions(struct dd_function_table *functions)
+/* Initialize query object functions used on all generations. */
+void brw_init_common_queryobj_functions(struct dd_function_table *functions)
{
functions->NewQueryObject = brw_new_query_object;
functions->DeleteQuery = brw_delete_query;
+ functions->QueryCounter = brw_query_counter;
+ functions->GetTimestamp = brw_get_timestamp;
+}
+
+/* Initialize Gen4/5-specific query object functions. */
+void gen4_init_queryobj_functions(struct dd_function_table *functions)
+{
functions->BeginQuery = brw_begin_query;
functions->EndQuery = brw_end_query;
- functions->QueryCounter = brw_query_counter;
functions->CheckQuery = brw_check_query;
functions->WaitQuery = brw_wait_query;
- functions->GetTimestamp = brw_get_timestamp;
}
--- /dev/null
+/*
+ * 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>
+ * Kenneth Graunke <kenneth@whitecape.org>
+ */
+
+/** @file gen6_queryobj.c
+ *
+ * Support for query objects (GL_ARB_occlusion_query, GL_ARB_timer_query,
+ * GL_EXT_transform_feedback, and friends) on platforms that support
+ * hardware contexts (Gen6+).
+ */
+#include "main/imports.h"
+
+#include "brw_context.h"
+#include "brw_defines.h"
+#include "brw_state.h"
+#include "intel_batchbuffer.h"
+#include "intel_reg.h"
+
+/**
+ * Emit PIPE_CONTROLs to write the current GPU timestamp into a buffer.
+ */
+static void
+write_timestamp(struct intel_context *intel, drm_intel_bo *query_bo, int idx)
+{
+ /* Emit workaround flushes: */
+ if (intel->gen == 6) {
+ /* The timestamp write below is a non-zero post-sync op, which on
+ * Gen6 necessitates a CS stall. CS stalls need stall at scoreboard
+ * set. See the comments for intel_emit_post_sync_nonzero_flush().
+ */
+ BEGIN_BATCH(4);
+ OUT_BATCH(_3DSTATE_PIPE_CONTROL | (4 - 2));
+ OUT_BATCH(PIPE_CONTROL_CS_STALL | PIPE_CONTROL_STALL_AT_SCOREBOARD);
+ OUT_BATCH(0);
+ OUT_BATCH(0);
+ ADVANCE_BATCH();
+ }
+
+ BEGIN_BATCH(5);
+ OUT_BATCH(_3DSTATE_PIPE_CONTROL | (5 - 2));
+ OUT_BATCH(PIPE_CONTROL_WRITE_TIMESTAMP);
+ OUT_RELOC(query_bo,
+ I915_GEM_DOMAIN_INSTRUCTION, I915_GEM_DOMAIN_INSTRUCTION,
+ PIPE_CONTROL_GLOBAL_GTT_WRITE |
+ idx * sizeof(uint64_t));
+ OUT_BATCH(0);
+ OUT_BATCH(0);
+ ADVANCE_BATCH();
+}
+
+/**
+ * Emit PIPE_CONTROLs to write the PS_DEPTH_COUNT register into a buffer.
+ */
+static void
+write_depth_count(struct intel_context *intel, drm_intel_bo *query_bo, int idx)
+{
+ /* Emit Sandybridge workaround flush: */
+ if (intel->gen == 6)
+ intel_emit_post_sync_nonzero_flush(intel);
+
+ BEGIN_BATCH(5);
+ OUT_BATCH(_3DSTATE_PIPE_CONTROL | (5 - 2));
+ OUT_BATCH(PIPE_CONTROL_DEPTH_STALL |
+ PIPE_CONTROL_WRITE_DEPTH_COUNT);
+ OUT_RELOC(query_bo,
+ I915_GEM_DOMAIN_INSTRUCTION, I915_GEM_DOMAIN_INSTRUCTION,
+ PIPE_CONTROL_GLOBAL_GTT_WRITE |
+ (idx * sizeof(uint64_t)));
+ OUT_BATCH(0);
+ OUT_BATCH(0);
+ ADVANCE_BATCH();
+}
+
+/**
+ * Wait on the query object's BO and calculate the final result.
+ */
+static void
+gen6_queryobj_get_results(struct gl_context *ctx,
+ struct brw_query_object *query)
+{
+ struct intel_context *intel = intel_context(ctx);
+
+ if (query->bo == NULL)
+ return;
+
+ /* If the application has requested the query result, but this batch is
+ * still contributing to it, flush it now so the results will be present
+ * when mapped.
+ */
+ if (drm_intel_bo_references(intel->batch.bo, query->bo))
+ intel_batchbuffer_flush(intel);
+
+ if (unlikely(intel->perf_debug)) {
+ if (drm_intel_bo_busy(query->bo)) {
+ perf_debug("Stalling on the GPU waiting for a query object.\n");
+ }
+ }
+
+ drm_intel_bo_map(query->bo, false);
+ uint64_t *results = query->bo->virtual;
+ switch (query->Base.Target) {
+ case GL_TIME_ELAPSED:
+ /* The query BO contains the starting and ending timestamps.
+ * Subtract the two and convert to nanoseconds.
+ */
+ query->Base.Result += 80 * (results[1] - results[0]);
+ break;
+
+ case GL_TIMESTAMP:
+ /* Our timer is a clock that increments every 80ns (regardless of
+ * other clock scaling in the system). The timestamp register we can
+ * read for glGetTimestamp() masks out the top 32 bits, so we do that
+ * here too to let the two counters be compared against each other.
+ *
+ * If we just multiplied that 32 bits of data by 80, it would roll
+ * over at a non-power-of-two, so an application couldn't use
+ * GL_QUERY_COUNTER_BITS to handle rollover correctly. Instead, we
+ * report 36 bits and truncate at that (rolling over 5 times as often
+ * as the HW counter), and when the 32-bit counter rolls over, it
+ * happens to also be at a rollover in the reported value from near
+ * (1<<36) to 0.
+ *
+ * The low 32 bits rolls over in ~343 seconds. Our 36-bit result
+ * rolls over every ~69 seconds.
+ *
+ * The query BO contains a single timestamp value in results[0].
+ */
+ query->Base.Result = 80 * (results[0] & 0xffffffff);
+ query->Base.Result &= (1ull << 36) - 1;
+ break;
+
+ case GL_SAMPLES_PASSED_ARB:
+ /* We need to use += rather than = here since some BLT-based operations
+ * may have added additional samples to our occlusion query value.
+ */
+ query->Base.Result += results[1] - results[0];
+ break;
+
+ case GL_ANY_SAMPLES_PASSED:
+ case GL_ANY_SAMPLES_PASSED_CONSERVATIVE:
+ if (results[0] != results[1])
+ query->Base.Result = true;
+ break;
+
+ case GL_PRIMITIVES_GENERATED:
+ case GL_TRANSFORM_FEEDBACK_PRIMITIVES_WRITTEN:
+ /* We don't actually query the hardware for this value, so query->bo
+ * should always be NULL and execution should never reach here.
+ */
+ assert(!"Unreachable");
+ break;
+
+ default:
+ assert(!"Unrecognized query target in brw_queryobj_get_results()");
+ break;
+ }
+ drm_intel_bo_unmap(query->bo);
+
+ /* Now that we've processed the data stored in the query's buffer object,
+ * we can release it.
+ */
+ drm_intel_bo_unreference(query->bo);
+ query->bo = NULL;
+}
+
+/**
+ * Driver hook for glBeginQuery().
+ *
+ * Initializes driver structures and emits any GPU commands required to begin
+ * recording data for the query.
+ */
+static void
+gen6_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;
+
+ switch (query->Base.Target) {
+ case GL_TIME_ELAPSED:
+ /* For timestamp queries, we record the starting time right away so that
+ * we measure the full time between BeginQuery and EndQuery. There's
+ * some debate about whether this is the right thing to do. Our decision
+ * is based on the following text from the ARB_timer_query extension:
+ *
+ * "(5) Should the extension measure total time elapsed between the full
+ * completion of the BeginQuery and EndQuery commands, or just time
+ * spent in the graphics library?
+ *
+ * RESOLVED: This extension will measure the total time elapsed
+ * between the full completion of these commands. Future extensions
+ * may implement a query to determine time elapsed at different stages
+ * of the graphics pipeline."
+ *
+ * We write a starting timestamp now (at index 0). At EndQuery() time,
+ * we'll write a second timestamp (at index 1), and subtract the two to
+ * obtain the time elapsed. Notably, this includes time elapsed while
+ * the system was doing other work, such as running other applications.
+ */
+ drm_intel_bo_unreference(query->bo);
+ query->bo = drm_intel_bo_alloc(intel->bufmgr, "timer query", 4096, 4096);
+ write_timestamp(intel, query->bo, 0);
+ break;
+
+ case GL_ANY_SAMPLES_PASSED:
+ case GL_ANY_SAMPLES_PASSED_CONSERVATIVE:
+ case GL_SAMPLES_PASSED_ARB:
+ /* Since we're starting a new query, we need to be sure to throw away
+ * any previous occlusion query results.
+ */
+ drm_intel_bo_unreference(query->bo);
+ query->bo = drm_intel_bo_alloc(intel->bufmgr, "occl. query", 4096, 4096);
+ write_depth_count(intel, query->bo, 0);
+ break;
+
+ case GL_PRIMITIVES_GENERATED:
+ /* We don't actually query the hardware for this value; we keep track of
+ * it a software counter. So just reset the counter.
+ */
+ brw->sol.primitives_generated = 0;
+ brw->sol.counting_primitives_generated = true;
+ break;
+
+ case GL_TRANSFORM_FEEDBACK_PRIMITIVES_WRITTEN:
+ /* We don't actually query the hardware for this value; we keep track of
+ * it a software counter. So just reset the counter.
+ */
+ brw->sol.primitives_written = 0;
+ brw->sol.counting_primitives_written = true;
+ break;
+
+ default:
+ assert(!"Unrecognized query target in brw_begin_query()");
+ break;
+ }
+}
+
+/**
+ * Driver hook for glEndQuery().
+ *
+ * Emits GPU commands to record a final query value, ending any data capturing.
+ * However, the final result isn't necessarily available until the GPU processes
+ * those commands. brw_queryobj_get_results() processes the captured data to
+ * produce the final result.
+ */
+static void
+gen6_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;
+
+ switch (query->Base.Target) {
+ case GL_TIME_ELAPSED:
+ write_timestamp(intel, query->bo, 1);
+ break;
+
+ case GL_ANY_SAMPLES_PASSED:
+ case GL_ANY_SAMPLES_PASSED_CONSERVATIVE:
+ case GL_SAMPLES_PASSED_ARB:
+ write_depth_count(intel, query->bo, 1);
+ break;
+
+ case GL_PRIMITIVES_GENERATED:
+ /* We don't actually query the hardware for this value; we keep track of
+ * it in a software counter. So just read the counter and store it in
+ * the query object.
+ */
+ query->Base.Result = brw->sol.primitives_generated;
+ brw->sol.counting_primitives_generated = false;
+ break;
+
+ case GL_TRANSFORM_FEEDBACK_PRIMITIVES_WRITTEN:
+ /* We don't actually query the hardware for this value; we keep track of
+ * it in a software counter. So just read the counter and store it in
+ * the query object.
+ */
+ query->Base.Result = brw->sol.primitives_written;
+ brw->sol.counting_primitives_written = false;
+ break;
+
+ default:
+ assert(!"Unrecognized query target in brw_end_query()");
+ break;
+ }
+}
+
+/**
+ * The WaitQuery() driver hook.
+ *
+ * Wait for a query result to become available and return it. This is the
+ * backing for glGetQueryObjectiv() with the GL_QUERY_RESULT pname.
+ */
+static void gen6_wait_query(struct gl_context *ctx, struct gl_query_object *q)
+{
+ struct brw_query_object *query = (struct brw_query_object *)q;
+
+ gen6_queryobj_get_results(ctx, query);
+ query->Base.Ready = true;
+}
+
+/**
+ * The CheckQuery() driver hook.
+ *
+ * Checks whether a query result is ready yet. If not, flushes.
+ * This is the backing for glGetQueryObjectiv()'s QUERY_RESULT_AVAILABLE pname.
+ */
+static void gen6_check_query(struct gl_context *ctx, struct gl_query_object *q)
+{
+ struct intel_context *intel = intel_context(ctx);
+ struct brw_query_object *query = (struct brw_query_object *)q;
+
+ /* From the GL_ARB_occlusion_query spec:
+ *
+ * "Instead of allowing for an infinite loop, performing a
+ * QUERY_RESULT_AVAILABLE_ARB will perform a flush if the result is
+ * not ready yet on the first time it is queried. This ensures that
+ * the async query will return true in finite time.
+ */
+ if (query->bo && drm_intel_bo_references(intel->batch.bo, query->bo))
+ intel_batchbuffer_flush(intel);
+
+ if (query->bo == NULL || !drm_intel_bo_busy(query->bo)) {
+ gen6_queryobj_get_results(ctx, query);
+ query->Base.Ready = true;
+ }
+}
+
+/* Initialize Gen6+-specific query object functions. */
+void gen6_init_queryobj_functions(struct dd_function_table *functions)
+{
+ functions->BeginQuery = gen6_begin_query;
+ functions->EndQuery = gen6_end_query;
+ functions->CheckQuery = gen6_check_query;
+ functions->WaitQuery = gen6_wait_query;
+}
projects / mesa.git / commitdiff