| /* |
| * 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_buffer_objects.h" |
| |
| static inline void |
| set_query_availability(struct brw_context *brw, struct brw_query_object *query, |
| bool available) |
| { |
| /* For platforms that support ARB_query_buffer_object, we write the |
| * query availability for "pipelined" queries. |
| * |
| * Most counter snapshots are written by the command streamer, by |
| * doing a CS stall and then MI_STORE_REGISTER_MEM. For these |
| * counters, the CS stall guarantees that the results will be |
| * available when subsequent CS commands run. So we don't need to |
| * do any additional tracking. |
| * |
| * Other counters (occlusion queries and timestamp) are written by |
| * PIPE_CONTROL, without a CS stall. This means that we can't be |
| * sure whether the writes have landed yet or not. Performing a |
| * PIPE_CONTROL with an immediate write will synchronize with |
| * those earlier writes, so we write 1 when the value has landed. |
| */ |
| if (brw->ctx.Extensions.ARB_query_buffer_object && |
| brw_is_query_pipelined(query)) { |
| brw_emit_pipe_control_write(brw, |
| PIPE_CONTROL_WRITE_IMMEDIATE, |
| query->bo, 2 * sizeof(uint64_t), |
| available, 0); |
| } |
| } |
| |
| static void |
| write_primitives_generated(struct brw_context *brw, |
| drm_intel_bo *query_bo, int stream, int idx) |
| { |
| brw_emit_mi_flush(brw); |
| |
| if (brw->gen >= 7 && stream > 0) { |
| brw_store_register_mem64(brw, query_bo, |
| GEN7_SO_PRIM_STORAGE_NEEDED(stream), |
| idx * sizeof(uint64_t)); |
| } else { |
| brw_store_register_mem64(brw, query_bo, CL_INVOCATION_COUNT, |
| idx * sizeof(uint64_t)); |
| } |
| } |
| |
| static void |
| write_xfb_primitives_written(struct brw_context *brw, |
| drm_intel_bo *bo, int stream, int idx) |
| { |
| brw_emit_mi_flush(brw); |
| |
| if (brw->gen >= 7) { |
| brw_store_register_mem64(brw, bo, GEN7_SO_NUM_PRIMS_WRITTEN(stream), |
| idx * sizeof(uint64_t)); |
| } else { |
| brw_store_register_mem64(brw, bo, GEN6_SO_NUM_PRIMS_WRITTEN, |
| idx * sizeof(uint64_t)); |
| } |
| } |
| |
| static inline int |
| pipeline_target_to_index(int target) |
| { |
| if (target == GL_GEOMETRY_SHADER_INVOCATIONS) |
| return MAX_PIPELINE_STATISTICS - 1; |
| else |
| return target - GL_VERTICES_SUBMITTED_ARB; |
| } |
| |
| static void |
| emit_pipeline_stat(struct brw_context *brw, drm_intel_bo *bo, |
| int stream, int target, int idx) |
| { |
| /* One source of confusion is the tessellation shader statistics. The |
| * hardware has no statistics specific to the TE unit. Ideally we could have |
| * the HS primitives for TESS_CONTROL_SHADER_PATCHES_ARB, and the DS |
| * invocations as the register for TESS_CONTROL_SHADER_PATCHES_ARB. |
| * Unfortunately we don't have HS primitives, we only have HS invocations. |
| */ |
| |
| /* Everything except GEOMETRY_SHADER_INVOCATIONS can be kept in a simple |
| * lookup table |
| */ |
| static const uint32_t target_to_register[] = { |
| IA_VERTICES_COUNT, /* VERTICES_SUBMITTED */ |
| IA_PRIMITIVES_COUNT, /* PRIMITIVES_SUBMITTED */ |
| VS_INVOCATION_COUNT, /* VERTEX_SHADER_INVOCATIONS */ |
| HS_INVOCATION_COUNT, /* TESS_CONTROL_SHADER_PATCHES */ |
| DS_INVOCATION_COUNT, /* TESS_EVALUATION_SHADER_INVOCATIONS */ |
| GS_PRIMITIVES_COUNT, /* GEOMETRY_SHADER_PRIMITIVES_EMITTED */ |
| PS_INVOCATION_COUNT, /* FRAGMENT_SHADER_INVOCATIONS */ |
| CS_INVOCATION_COUNT, /* COMPUTE_SHADER_INVOCATIONS */ |
| CL_INVOCATION_COUNT, /* CLIPPING_INPUT_PRIMITIVES */ |
| CL_PRIMITIVES_COUNT, /* CLIPPING_OUTPUT_PRIMITIVES */ |
| GS_INVOCATION_COUNT /* This one is special... */ |
| }; |
| STATIC_ASSERT(ARRAY_SIZE(target_to_register) == MAX_PIPELINE_STATISTICS); |
| uint32_t reg = target_to_register[pipeline_target_to_index(target)]; |
| /* Gen6 GS code counts full primitives, that is, it won't count individual |
| * triangles in a triangle strip. Use CL_INVOCATION_COUNT for that. |
| */ |
| if (brw->gen == 6 && target == GL_GEOMETRY_SHADER_PRIMITIVES_EMITTED_ARB) |
| reg = CL_INVOCATION_COUNT; |
| assert(reg != 0); |
| |
| /* Emit a flush to make sure various parts of the pipeline are complete and |
| * we get an accurate value |
| */ |
| brw_emit_mi_flush(brw); |
| |
| brw_store_register_mem64(brw, bo, reg, idx * sizeof(uint64_t)); |
| } |
| |
| |
| /** |
| * 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 brw_context *brw = brw_context(ctx); |
| |
| if (query->bo == NULL) |
| return; |
| |
| brw_bo_map(brw, query->bo, false, "query object"); |
| 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: |
| case GL_VERTICES_SUBMITTED_ARB: |
| case GL_PRIMITIVES_SUBMITTED_ARB: |
| case GL_VERTEX_SHADER_INVOCATIONS_ARB: |
| case GL_GEOMETRY_SHADER_INVOCATIONS: |
| case GL_GEOMETRY_SHADER_PRIMITIVES_EMITTED_ARB: |
| case GL_CLIPPING_INPUT_PRIMITIVES_ARB: |
| case GL_CLIPPING_OUTPUT_PRIMITIVES_ARB: |
| case GL_COMPUTE_SHADER_INVOCATIONS_ARB: |
| case GL_TESS_CONTROL_SHADER_PATCHES_ARB: |
| case GL_TESS_EVALUATION_SHADER_INVOCATIONS_ARB: |
| query->Base.Result = results[1] - results[0]; |
| break; |
| |
| case GL_FRAGMENT_SHADER_INVOCATIONS_ARB: |
| query->Base.Result = (results[1] - results[0]); |
| /* Implement the "WaDividePSInvocationCountBy4:HSW,BDW" workaround: |
| * "Invocation counter is 4 times actual. WA: SW to divide HW reported |
| * PS Invocations value by 4." |
| * |
| * Prior to Haswell, invocation count was counted by the WM, and it |
| * buggily counted invocations in units of subspans (2x2 unit). To get the |
| * correct value, the CS multiplied this by 4. With HSW the logic moved, |
| * and correctly emitted the number of pixel shader invocations, but, |
| * whomever forgot to undo the multiply by 4. |
| */ |
| if (brw->gen == 8 || brw->is_haswell) |
| query->Base.Result /= 4; |
| break; |
| |
| default: |
| unreachable("Unrecognized query target in brw_queryobj_get_results()"); |
| } |
| 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; |
| |
| query->Base.Ready = true; |
| } |
| |
| /** |
| * 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 brw_query_object *query = (struct brw_query_object *)q; |
| |
| /* Since we're starting a new query, we need to throw away old results. */ |
| drm_intel_bo_unreference(query->bo); |
| query->bo = drm_intel_bo_alloc(brw->bufmgr, "query results", 4096, 4096); |
| |
| /* For ARB_query_buffer_object: The result is not available */ |
| set_query_availability(brw, query, false); |
| |
| 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. |
| */ |
| brw_write_timestamp(brw, query->bo, 0); |
| break; |
| |
| case GL_ANY_SAMPLES_PASSED: |
| case GL_ANY_SAMPLES_PASSED_CONSERVATIVE: |
| case GL_SAMPLES_PASSED_ARB: |
| brw_write_depth_count(brw, query->bo, 0); |
| break; |
| |
| case GL_PRIMITIVES_GENERATED: |
| write_primitives_generated(brw, query->bo, query->Base.Stream, 0); |
| if (query->Base.Stream == 0) |
| ctx->NewDriverState |= BRW_NEW_RASTERIZER_DISCARD; |
| break; |
| |
| case GL_TRANSFORM_FEEDBACK_PRIMITIVES_WRITTEN: |
| write_xfb_primitives_written(brw, query->bo, query->Base.Stream, 0); |
| break; |
| |
| case GL_VERTICES_SUBMITTED_ARB: |
| case GL_PRIMITIVES_SUBMITTED_ARB: |
| case GL_VERTEX_SHADER_INVOCATIONS_ARB: |
| case GL_GEOMETRY_SHADER_INVOCATIONS: |
| case GL_GEOMETRY_SHADER_PRIMITIVES_EMITTED_ARB: |
| case GL_FRAGMENT_SHADER_INVOCATIONS_ARB: |
| case GL_CLIPPING_INPUT_PRIMITIVES_ARB: |
| case GL_CLIPPING_OUTPUT_PRIMITIVES_ARB: |
| case GL_COMPUTE_SHADER_INVOCATIONS_ARB: |
| case GL_TESS_CONTROL_SHADER_PATCHES_ARB: |
| case GL_TESS_EVALUATION_SHADER_INVOCATIONS_ARB: |
| emit_pipeline_stat(brw, query->bo, query->Base.Stream, query->Base.Target, 0); |
| break; |
| |
| default: |
| unreachable("Unrecognized query target in brw_begin_query()"); |
| } |
| } |
| |
| /** |
| * 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 brw_query_object *query = (struct brw_query_object *)q; |
| |
| switch (query->Base.Target) { |
| case GL_TIME_ELAPSED: |
| brw_write_timestamp(brw, query->bo, 1); |
| break; |
| |
| case GL_ANY_SAMPLES_PASSED: |
| case GL_ANY_SAMPLES_PASSED_CONSERVATIVE: |
| case GL_SAMPLES_PASSED_ARB: |
| brw_write_depth_count(brw, query->bo, 1); |
| break; |
| |
| case GL_PRIMITIVES_GENERATED: |
| write_primitives_generated(brw, query->bo, query->Base.Stream, 1); |
| if (query->Base.Stream == 0) |
| ctx->NewDriverState |= BRW_NEW_RASTERIZER_DISCARD; |
| break; |
| |
| case GL_TRANSFORM_FEEDBACK_PRIMITIVES_WRITTEN: |
| write_xfb_primitives_written(brw, query->bo, query->Base.Stream, 1); |
| break; |
| |
| case GL_VERTICES_SUBMITTED_ARB: |
| case GL_PRIMITIVES_SUBMITTED_ARB: |
| case GL_VERTEX_SHADER_INVOCATIONS_ARB: |
| case GL_GEOMETRY_SHADER_PRIMITIVES_EMITTED_ARB: |
| case GL_FRAGMENT_SHADER_INVOCATIONS_ARB: |
| case GL_COMPUTE_SHADER_INVOCATIONS_ARB: |
| case GL_CLIPPING_INPUT_PRIMITIVES_ARB: |
| case GL_CLIPPING_OUTPUT_PRIMITIVES_ARB: |
| case GL_GEOMETRY_SHADER_INVOCATIONS: |
| case GL_TESS_CONTROL_SHADER_PATCHES_ARB: |
| case GL_TESS_EVALUATION_SHADER_INVOCATIONS_ARB: |
| emit_pipeline_stat(brw, query->bo, |
| query->Base.Stream, query->Base.Target, 1); |
| break; |
| |
| default: |
| unreachable("Unrecognized query target in brw_end_query()"); |
| } |
| |
| /* The current batch contains the commands to handle EndQuery(), |
| * but they won't actually execute until it is flushed. |
| */ |
| query->flushed = false; |
| |
| /* For ARB_query_buffer_object: The result is now available */ |
| set_query_availability(brw, query, true); |
| } |
| |
| /** |
| * Flush the batch if it still references the query object BO. |
| */ |
| static void |
| flush_batch_if_needed(struct brw_context *brw, struct brw_query_object *query) |
| { |
| /* If the batch doesn't reference the BO, it must have been flushed |
| * (for example, due to being full). Record that it's been flushed. |
| */ |
| query->flushed = query->flushed || |
| !drm_intel_bo_references(brw->batch.bo, query->bo); |
| |
| if (!query->flushed) |
| intel_batchbuffer_flush(brw); |
| } |
| |
| /** |
| * 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_context *brw = brw_context(ctx); |
| struct brw_query_object *query = (struct brw_query_object *)q; |
| |
| /* If the application has requested the query result, but this batch is |
| * still contributing to it, flush it now to finish that work so the |
| * result will become available (eventually). |
| */ |
| flush_batch_if_needed(brw, query); |
| |
| gen6_queryobj_get_results(ctx, query); |
| } |
| |
| /** |
| * 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 brw_context *brw = brw_context(ctx); |
| struct brw_query_object *query = (struct brw_query_object *)q; |
| |
| /* If query->bo is NULL, we've already gathered the results - this is a |
| * redundant CheckQuery call. Ignore it. |
| */ |
| if (query->bo == NULL) |
| return; |
| |
| /* 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. |
| */ |
| flush_batch_if_needed(brw, query); |
| |
| if (!drm_intel_bo_busy(query->bo)) { |
| gen6_queryobj_get_results(ctx, query); |
| } |
| } |
| |
| static void |
| gen6_query_counter(struct gl_context *ctx, struct gl_query_object *q) |
| { |
| struct brw_context *brw = brw_context(ctx); |
| struct brw_query_object *query = (struct brw_query_object *)q; |
| brw_query_counter(ctx, q); |
| set_query_availability(brw, query, 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; |
| functions->QueryCounter = gen6_query_counter; |
| } |
