X-Git-Url: https://git.libre-soc.org/?a=blobdiff_plain;f=src%2Fmesa%2Fdrivers%2Fdri%2Fi965%2Fbrw_queryobj.c;h=bc4b8c43e7b669330a1edba5041ee56380d56337;hb=030b6efcfdeff5cc079d5b6d8e682e180570ce71;hp=921fecd9e43d1075b4d49fa238791eae15b2e92b;hpb=61d0b9f52c6be4a4a64c30ea3a2a93ef8260c67b;p=mesa.git diff --git a/src/mesa/drivers/dri/i965/brw_queryobj.c b/src/mesa/drivers/dri/i965/brw_queryobj.c index 921fecd9e43..bc4b8c43e7b 100644 --- a/src/mesa/drivers/dri/i965/brw_queryobj.c +++ b/src/mesa/drivers/dri/i965/brw_queryobj.c @@ -25,74 +25,204 @@ * */ -/** @file support for ARB_query_object +/** @file brw_queryobj.c * - * 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. + * Support for query objects (GL_ARB_occlusion_query, GL_ARB_timer_query, + * GL_EXT_transform_feedback, and friends). * - * 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. + * The hardware provides a PIPE_CONTROL command that can report the number of + * fragments that passed the depth test, or the hardware timer. They are + * appropriately synced with the stage of the pipeline for our extensions' + * needs. */ #include "main/imports.h" #include "brw_context.h" +#include "brw_defines.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 */ +uint64_t +brw_timebase_scale(struct brw_context *brw, uint64_t gpu_timestamp) +{ + const struct gen_device_info *devinfo = &brw->screen->devinfo; + + return (1000000000ull * gpu_timestamp) / devinfo->timestamp_frequency; +} + +/* As best we know currently, the Gen HW timestamps are 36bits across + * all platforms, which we need to account for when calculating a + * delta to measure elapsed time. + * + * The timestamps read via glGetTimestamp() / brw_get_timestamp() sometimes + * only have 32bits due to a kernel bug and so in that case we make sure to + * treat all raw timestamps as 32bits so they overflow consistently and remain + * comparable. (Note: the timestamps being passed here are not from the kernel + * so we don't need to be taking the upper 32bits in this buggy kernel case we + * are just clipping to 32bits here for consistency.) + */ +uint64_t +brw_raw_timestamp_delta(struct brw_context *brw, uint64_t time0, uint64_t time1) +{ + if (brw->screen->hw_has_timestamp == 2) { + /* Kernel clips timestamps to 32bits in this case, so we also clip + * PIPE_CONTROL timestamps for consistency. + */ + return (uint32_t)time1 - (uint32_t)time0; + } else { + if (time0 > time1) { + return (1ULL << 36) + time1 - time0; + } else { + return time1 - time0; + } + } +} + +/** + * Emit PIPE_CONTROLs to write the current GPU timestamp into a buffer. + */ +void +brw_write_timestamp(struct brw_context *brw, struct brw_bo *query_bo, int idx) +{ + const struct gen_device_info *devinfo = &brw->screen->devinfo; + + if (devinfo->gen == 6) { + /* Emit Sandybridge workaround flush: */ + brw_emit_pipe_control_flush(brw, + PIPE_CONTROL_CS_STALL | + PIPE_CONTROL_STALL_AT_SCOREBOARD); + } + + uint32_t flags = PIPE_CONTROL_WRITE_TIMESTAMP; + + if (devinfo->gen == 9 && devinfo->gt == 4) + flags |= PIPE_CONTROL_CS_STALL; + + brw_emit_pipe_control_write(brw, flags, + query_bo, idx * sizeof(uint64_t), 0); +} + +/** + * Emit PIPE_CONTROLs to write the PS_DEPTH_COUNT register into a buffer. + */ +void +brw_write_depth_count(struct brw_context *brw, struct brw_bo *query_bo, int idx) +{ + const struct gen_device_info *devinfo = &brw->screen->devinfo; + uint32_t flags = PIPE_CONTROL_WRITE_DEPTH_COUNT | PIPE_CONTROL_DEPTH_STALL; + + if (devinfo->gen == 9 && devinfo->gt == 4) + flags |= PIPE_CONTROL_CS_STALL; + + if (devinfo->gen >= 10) { + /* "Driver must program PIPE_CONTROL with only Depth Stall Enable bit set + * prior to programming a PIPE_CONTROL with Write PS Depth Count Post sync + * operation." + */ + brw_emit_pipe_control_flush(brw, PIPE_CONTROL_DEPTH_STALL); + } + + brw_emit_pipe_control_write(brw, flags, + query_bo, idx * sizeof(uint64_t), 0); +} + +/** + * Wait on the query object's BO and calculate the final result. + */ static void brw_queryobj_get_results(struct gl_context *ctx, struct brw_query_object *query) { - struct intel_context *intel = intel_context(ctx); + struct brw_context *brw = brw_context(ctx); + UNUSED const struct gen_device_info *devinfo = &brw->screen->devinfo; int i; uint64_t *results; + assert(devinfo->gen < 6); + if (query->bo == NULL) return; - drm_intel_bo_map(query->bo, false); - results = query->bo->virtual; + /* 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 (brw_batch_references(&brw->batch, query->bo)) + intel_batchbuffer_flush(brw); + + if (unlikely(brw->perf_debug)) { + if (brw_bo_busy(query->bo)) { + perf_debug("Stalling on the GPU waiting for a query object.\n"); + } + } + + results = brw_bo_map(brw, query->bo, MAP_READ); switch (query->Base.Target) { case GL_TIME_ELAPSED_EXT: - if (intel->gen >= 6) - query->Base.Result += 80 * (results[1] - results[0]); - else - query->Base.Result += 1000 * ((results[1] >> 32) - (results[0] >> 32)); + /* The query BO contains the starting and ending timestamps. + * Subtract the two and convert to nanoseconds. + */ + query->Base.Result = brw_raw_timestamp_delta(brw, results[0], results[1]); + query->Base.Result = brw_timebase_scale(brw, query->Base.Result); + break; + + case GL_TIMESTAMP: + /* The query BO contains a single timestamp value in results[0]. */ + query->Base.Result = brw_timebase_scale(brw, results[0]); + + /* Ensure the scaled timestamp overflows according to + * GL_QUERY_COUNTER_BITS + */ + query->Base.Result &= (1ull << ctx->Const.QueryCounterBits.Timestamp) - 1; break; case GL_SAMPLES_PASSED_ARB: - /* Map and count the pixels from the current query BO */ - for (i = query->first_index; i <= query->last_index; i++) { + /* Loop over pairs of values from the BO, which are the PS_DEPTH_COUNT + * value at the start and end of the batchbuffer. Subtract them to + * get the number of fragments which passed the depth test in each + * individual batch, and add those differences up to get the number + * of fragments for the entire query. + * + * Note that query->Base.Result may already be non-zero. We may have + * run out of space in the query's BO and allocated a new one. If so, + * this function was already called to accumulate the results so far. + */ + for (i = 0; i < query->last_index; i++) { query->Base.Result += results[i * 2 + 1] - results[i * 2]; } 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. + case GL_ANY_SAMPLES_PASSED: + case GL_ANY_SAMPLES_PASSED_CONSERVATIVE: + /* If the starting and ending PS_DEPTH_COUNT from any of the batches + * differ, then some fragments passed the depth test. */ - assert(!"Unreachable"); + for (i = 0; i < query->last_index; i++) { + if (results[i * 2 + 1] != results[i * 2]) { + query->Base.Result = GL_TRUE; + break; + } + } break; default: - assert(!"Unrecognized query target in brw_queryobj_get_results()"); - break; + unreachable("Unrecognized query target in brw_queryobj_get_results()"); } - drm_intel_bo_unmap(query->bo); + brw_bo_unmap(query->bo); - drm_intel_bo_unreference(query->bo); + /* Now that we've processed the data stored in the query's buffer object, + * we can release it. + */ + brw_bo_unreference(query->bo); query->bo = NULL; } +/** + * The NewQueryObject() driver hook. + * + * Allocates and initializes a new query object. + */ static struct gl_query_object * brw_new_query_object(struct gl_context *ctx, GLuint id) { @@ -108,334 +238,392 @@ brw_new_query_object(struct gl_context *ctx, GLuint id) return &query->Base; } +/** + * The DeleteQuery() driver hook. + */ 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); + brw_bo_unreference(query->bo); free(query); } +/** + * Gen4-5 driver hook for glBeginQuery(). + * + * Initializes driver structures and emits any GPU commands required to begin + * recording data for the 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; + UNUSED const struct gen_device_info *devinfo = &brw->screen->devinfo; + + assert(devinfo->gen < 6); switch (query->Base.Target) { case 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 | (4 - 2)); - 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 | (4 - 2) | - 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(); - } + /* 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_bo_unreference(query->bo); + query->bo = + brw_bo_alloc(brw->bufmgr, "timer query", 4096, BRW_MEMZONE_OTHER); + brw_write_timestamp(brw, query->bo, 0); break; + case GL_ANY_SAMPLES_PASSED: + case GL_ANY_SAMPLES_PASSED_CONSERVATIVE: case GL_SAMPLES_PASSED_ARB: - /* Reset our driver's tracking of query state. */ - drm_intel_bo_unreference(query->bo); + /* For occlusion queries, we delay taking an initial sample until the + * first drawing occurs in this batch. See the reasoning in the comments + * for brw_emit_query_begin() below. + * + * Since we're starting a new query, we need to be sure to throw away + * any previous occlusion query results. + */ + brw_bo_unreference(query->bo); query->bo = NULL; - query->first_index = -1; query->last_index = -1; brw->query.obj = query; - intel->stats_wm++; - 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. + /* Depth statistics on Gen4 require strange workarounds, so we try to + * avoid them when necessary. They're required for occlusion queries, + * so turn them on now. */ - 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; + brw->stats_wm++; + brw->ctx.NewDriverState |= BRW_NEW_STATS_WM; break; default: - assert(!"Unrecognized query target in brw_begin_query()"); - break; + unreachable("Unrecognized query target in brw_begin_query()"); } } /** - * Begin the ARB_occlusion_query query on a query object. + * 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 + * those commands. brw_queryobj_get_results() processes the captured data to + * produce the final result. */ 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; + UNUSED const struct gen_device_info *devinfo = &brw->screen->devinfo; + + assert(devinfo->gen < 6); switch (query->Base.Target) { case GL_TIME_ELAPSED_EXT: - if (intel->gen >= 6) { - BEGIN_BATCH(4); - OUT_BATCH(_3DSTATE_PIPE_CONTROL | (4 - 2)); - 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 | (4 - 2) | - 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); + /* Write the final timestamp. */ + brw_write_timestamp(brw, query->bo, 1); break; + case GL_ANY_SAMPLES_PASSED: + case GL_ANY_SAMPLES_PASSED_CONSERVATIVE: case GL_SAMPLES_PASSED_ARB: - /* 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); - drm_intel_bo_unreference(brw->query.bo); - brw->query.bo = NULL; + /* No query->bo means that EndQuery was called after BeginQuery with no + * intervening drawing. Rather than doing nothing at all here in this + * case, we emit the query_begin and query_end state to the + * hardware. This is to guarantee that waiting on the result of this + * empty state will cause all previous queries to complete at all, as + * required by the specification: + * + * It must always be true that if any query object + * returns a result available of TRUE, all queries of the + * same type issued prior to that query must also return + * TRUE. [Open GL 4.3 (Core Profile) Section 4.2.1] + */ + if (!query->bo) { + brw_emit_query_begin(brw); } - brw->query.obj = NULL; - - intel->stats_wm--; - 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; + assert(query->bo); - /* And set brw->query.obj to NULL so that this query won't try to wait - * for any rendering to complete. - */ - query->bo = NULL; - break; + brw_emit_query_end(brw); - 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; + brw->query.obj = NULL; - /* And set brw->query.obj to NULL so that this query won't try to wait - * for any rendering to complete. - */ - query->bo = NULL; + brw->stats_wm--; + brw->ctx.NewDriverState |= BRW_NEW_STATS_WM; break; default: - assert(!"Unrecognized query target in brw_end_query()"); - break; + unreachable("Unrecognized query target in brw_end_query()"); } } +/** + * 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. + */ static void brw_wait_query(struct gl_context *ctx, struct gl_query_object *q) { struct brw_query_object *query = (struct brw_query_object *)q; + UNUSED const struct gen_device_info *devinfo = + &brw_context(ctx)->screen->devinfo; + + assert(devinfo->gen < 6); brw_queryobj_get_results(ctx, query); query->Base.Ready = true; } +/** + * 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. + */ static void brw_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; + UNUSED const struct gen_device_info *devinfo = &brw->screen->devinfo; + + assert(devinfo->gen < 6); - if (query->bo == NULL || !drm_intel_bo_busy(query->bo)) { + /* 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 && brw_batch_references(&brw->batch, query->bo)) + intel_batchbuffer_flush(brw); + + if (query->bo == NULL || !brw_bo_busy(query->bo)) { brw_queryobj_get_results(ctx, query); query->Base.Ready = true; } } -/** Called to set up the query BO and account for its aperture space */ -void -brw_prepare_query_begin(struct brw_context *brw) +/** + * Ensure there query's BO has enough space to store a new pair of values. + * + * If not, gather the existing BO's results and create a new buffer of the + * same size. + */ +static void +ensure_bo_has_space(struct gl_context *ctx, struct brw_query_object *query) { - struct intel_context *intel = &brw->intel; - - /* Skip if we're not doing any queries. */ - if (!brw->query.obj) - return; + struct brw_context *brw = brw_context(ctx); + UNUSED const struct gen_device_info *devinfo = &brw->screen->devinfo; - /* 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; + assert(devinfo->gen < 6); - brw->query.bo = drm_intel_bo_alloc(intel->bufmgr, "query", 4096, 1); + if (!query->bo || query->last_index * 2 + 1 >= 4096 / sizeof(uint64_t)) { - /* clear target buffer */ - drm_intel_bo_map(brw->query.bo, true); - memset((char *)brw->query.bo->virtual, 0, 4096); - drm_intel_bo_unmap(brw->query.bo); + if (query->bo != NULL) { + /* The old query BO did not have enough space, so we allocated a new + * one. Gather the results so far (adding up the differences) and + * release the old BO. + */ + brw_queryobj_get_results(ctx, query); + } - brw->query.index = 0; + query->bo = brw_bo_alloc(brw->bufmgr, "query", 4096, BRW_MEMZONE_OTHER); + query->last_index = 0; } } -/** Called just before primitive drawing to get a beginning PS_DEPTH_COUNT. */ +/** + * Record the PS_DEPTH_COUNT value (for occlusion queries) just before + * primitive drawing. + * + * In a pre-hardware context world, the single PS_DEPTH_COUNT register is + * shared among all applications using the GPU. However, our query value + * needs to only include fragments generated by our application/GL context. + * + * To accommodate this, we record PS_DEPTH_COUNT at the start and end of + * each batchbuffer (technically, the first primitive drawn and flush time). + * Subtracting each pair of values calculates the change in PS_DEPTH_COUNT + * caused by a batchbuffer. Since there is no preemption inside batches, + * this is guaranteed to only measure the effects of our current application. + * + * Adding each of these differences (in case drawing is done over many batches) + * 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, and skipped. + */ void brw_emit_query_begin(struct brw_context *brw) { - struct intel_context *intel = &brw->intel; - struct gl_context *ctx = &intel->ctx; + struct gl_context *ctx = &brw->ctx; 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) + /* Skip if we're not doing any queries, or we've already recorded the + * initial query value for this batchbuffer. + */ + if (!query || brw->query.begin_emitted) return; - if (intel->gen >= 6) { - BEGIN_BATCH(8); - - /* workaround: CS stall required before depth stall. */ - OUT_BATCH(_3DSTATE_PIPE_CONTROL | (4 - 2)); - OUT_BATCH(PIPE_CONTROL_CS_STALL); - OUT_BATCH(0); /* write address */ - OUT_BATCH(0); /* write data */ - - OUT_BATCH(_3DSTATE_PIPE_CONTROL | (4 - 2)); - 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 | (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(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(); - } + ensure_bo_has_space(ctx, query); - if (query->bo != brw->query.bo) { - if (query->bo != NULL) - brw_queryobj_get_results(ctx, 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 = true; + brw_write_depth_count(brw, query->bo, query->last_index * 2); + + brw->query.begin_emitted = true; } -/** 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(). + */ void brw_emit_query_end(struct brw_context *brw) { - struct intel_context *intel = &brw->intel; + struct brw_query_object *query = brw->query.obj; - if (!brw->query.active) + if (!brw->query.begin_emitted) return; - if (intel->gen >= 6) { - BEGIN_BATCH(8); - /* workaround: CS stall required before depth stall. */ - OUT_BATCH(_3DSTATE_PIPE_CONTROL | (4 - 2)); - OUT_BATCH(PIPE_CONTROL_CS_STALL); - OUT_BATCH(0); /* write address */ - OUT_BATCH(0); /* write data */ - - OUT_BATCH(_3DSTATE_PIPE_CONTROL | (4 - 2)); - 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 | (4 - 2) | - 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_write_depth_count(brw, query->bo, query->last_index * 2 + 1); + + brw->query.begin_emitted = false; + query->last_index++; +} + +/** + * Driver hook for glQueryCounter(). + * + * This handles GL_TIMESTAMP queries, which perform a pipelined read of the + * current GPU time. This is unlike GL_TIME_ELAPSED, which measures the + * time while the query is active. + */ +void +brw_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; + + assert(q->Target == GL_TIMESTAMP); + + brw_bo_unreference(query->bo); + query->bo = + brw_bo_alloc(brw->bufmgr, "timestamp query", 4096, BRW_MEMZONE_OTHER); + brw_write_timestamp(brw, query->bo, 0); + + query->flushed = false; +} + +/** + * Read the TIMESTAMP register immediately (in a non-pipelined fashion). + * + * This is used to implement the GetTimestamp() driver hook. + */ +static uint64_t +brw_get_timestamp(struct gl_context *ctx) +{ + struct brw_context *brw = brw_context(ctx); + uint64_t result = 0; + + switch (brw->screen->hw_has_timestamp) { + case 3: /* New kernel, always full 36bit accuracy */ + brw_reg_read(brw->bufmgr, TIMESTAMP | 1, &result); + break; + case 2: /* 64bit kernel, result is left-shifted by 32bits, losing 4bits */ + brw_reg_read(brw->bufmgr, TIMESTAMP, &result); + result = result >> 32; + break; + case 1: /* 32bit kernel, result is 36bit wide but may be inaccurate! */ + brw_reg_read(brw->bufmgr, TIMESTAMP, &result); + break; } - brw->query.active = false; - brw->query.index++; + /* Scale to nanosecond units */ + result = brw_timebase_scale(brw, result); + + /* Ensure the scaled timestamp overflows according to + * GL_QUERY_COUNTER_BITS. Technically this isn't required if + * querying GL_TIMESTAMP via glGetInteger but it seems best to keep + * QueryObject and GetInteger timestamps consistent. + */ + result &= (1ull << ctx->Const.QueryCounterBits.Timestamp) - 1; + return result; } -void brw_init_queryobj_functions(struct dd_function_table *functions) +/** + * Is this type of query written by PIPE_CONTROL? + */ +bool +brw_is_query_pipelined(struct brw_query_object *query) +{ + switch (query->Base.Target) { + case GL_TIMESTAMP: + case GL_TIME_ELAPSED: + case GL_ANY_SAMPLES_PASSED: + case GL_ANY_SAMPLES_PASSED_CONSERVATIVE: + case GL_SAMPLES_PASSED_ARB: + return true; + + case GL_PRIMITIVES_GENERATED: + case GL_TRANSFORM_FEEDBACK_PRIMITIVES_WRITTEN: + case GL_TRANSFORM_FEEDBACK_STREAM_OVERFLOW_ARB: + case GL_TRANSFORM_FEEDBACK_OVERFLOW_ARB: + 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: + return false; + + default: + unreachable("Unrecognized query target in is_query_pipelined()"); + } +} + +/* 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->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->CheckQuery = brw_check_query; functions->WaitQuery = brw_wait_query; + functions->QueryCounter = brw_query_counter; }