diff options
Diffstat (limited to 'src/mesa/drivers/dri/i965/brw_queryobj.c')
| -rw-r--r-- | src/mesa/drivers/dri/i965/brw_queryobj.c | 263 |
1 files changed, 263 insertions, 0 deletions
diff --git a/src/mesa/drivers/dri/i965/brw_queryobj.c b/src/mesa/drivers/dri/i965/brw_queryobj.c new file mode 100644 index 0000000000..a1a1353dee --- /dev/null +++ b/src/mesa/drivers/dri/i965/brw_queryobj.c @@ -0,0 +1,263 @@ +/* + * 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/simple_list.h" +#include "main/imports.h" + +#include "brw_context.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; + + /* Map and count the pixels from the current query BO */ + dri_bo_map(query->bo, GL_FALSE); + results = query->bo->virtual; + for (i = query->first_index; i <= query->last_index; i++) { + query->Base.Result += results[i * 2 + 1] - results[i * 2]; + } + dri_bo_unmap(query->bo); + + dri_bo_unreference(query->bo); + query->bo = NULL; +} + +static struct gl_query_object * +brw_new_query_object(GLcontext *ctx, GLuint id) +{ + struct brw_query_object *query; + + query = _mesa_calloc(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(GLcontext *ctx, struct gl_query_object *q) +{ + struct brw_query_object *query = (struct brw_query_object *)q; + + dri_bo_unreference(query->bo); + _mesa_free(query); +} + +static void +brw_begin_query(GLcontext *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; + + /* Reset our driver's tracking of query state. */ + dri_bo_unreference(query->bo); + query->bo = NULL; + query->first_index = -1; + query->last_index = -1; + + insert_at_head(&brw->query.active_head, query); + intel->stats_wm++; +} + +/** + * Begin the ARB_occlusion_query query on a query object. + */ +static void +brw_end_query(GLcontext *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; + + /* 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); + + dri_bo_unreference(brw->query.bo); + brw->query.bo = NULL; + } + + remove_from_list(query); + + intel->stats_wm--; +} + +static void brw_wait_query(GLcontext *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(GLcontext *ctx, struct gl_query_object *q) +{ + /* XXX: Need to expose dri_bo_is_idle from bufmgr. */ +#if 0 + struct brw_query_object *query = (struct brw_query_object *)q; + + if (dri_bo_is_idle(query->bo)) { + brw_queryobj_get_results(query); + query->Base.Ready = GL_TRUE; + } +#else + brw_wait_query(ctx, q); +#endif +} + +/** 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; + dri_bo *aper_array[] = { + intel->batch->buf, + brw->query.bo, + }; + + /* Skip if we're not doing any queries. */ + if (is_empty_list(&brw->query.active_head)) + 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)) { + dri_bo_unreference(brw->query.bo); + brw->query.bo = NULL; + + brw->query.bo = dri_bo_alloc(intel->bufmgr, "query", 4096, 1); + brw->query.index = 0; + } + + if (dri_bufmgr_check_aperture_space(aper_array, ARRAY_SIZE(aper_array))) + intel_batchbuffer_flush(intel->batch); +} + +/** 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; + + /* Skip if we're not doing any queries, or we've emitted the start. */ + if (brw->query.active || is_empty_list(&brw->query.active_head)) + return; + + BEGIN_BATCH(4, IGNORE_CLIPRECTS); + 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(); + + foreach(query, &brw->query.active_head) { + if (query->bo != brw->query.bo) { + if (query->bo != NULL) + brw_queryobj_get_results(query); + dri_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; + + BEGIN_BATCH(4, IGNORE_CLIPRECTS); + 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; +} |