diff options
Diffstat (limited to 'src/gallium/drivers/i965/brw_pipe_query.c')
| -rw-r--r-- | src/gallium/drivers/i965/brw_pipe_query.c | 263 |
1 files changed, 263 insertions, 0 deletions
diff --git a/src/gallium/drivers/i965/brw_pipe_query.c b/src/gallium/drivers/i965/brw_pipe_query.c new file mode 100644 index 00000000000..2eb862635cc --- /dev/null +++ b/src/gallium/drivers/i965/brw_pipe_query.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 "util/u_simple_list.h" + +#include "brw_context.h" +#include "brw_state.h" +#include "brw_batchbuffer.h" +#include "brw_reg.h" + +/** Waits on the query object's BO and totals the results for this query */ +static boolean +brw_query_get_result(struct pipe_context *pipe, + struct pipe_query *q, + boolean wait, + uint64_t *result) +{ + struct brw_context *brw = brw_context(pipe); + struct brw_query_object *query = (struct brw_query_object *)q; + + /* Map and count the pixels from the current query BO */ + if (query->bo) { + int i; + uint64_t *map; + + if (brw->sws->bo_is_busy(query->bo) && !wait) + return FALSE; + + map = bo_map_read(brw->sws, query->bo); + if (map == NULL) + return FALSE; + + for (i = query->first_index; i <= query->last_index; i++) { + query->result += map[i * 2 + 1] - map[i * 2]; + } + + brw->sws->bo_unmap(query->bo); + bo_reference(&query->bo, NULL); + } + + *result = query->result; + return TRUE; +} + +static struct pipe_query * +brw_query_create(struct pipe_context *pipe, unsigned type ) +{ + struct brw_query_object *query; + + switch (type) { + case PIPE_QUERY_OCCLUSION_COUNTER: + query = CALLOC_STRUCT( brw_query_object ); + if (query == NULL) + return NULL; + return (struct pipe_query *)query; + + default: + return NULL; + } +} + +static void +brw_query_destroy(struct pipe_context *pipe, struct pipe_query *q) +{ + struct brw_query_object *query = (struct brw_query_object *)q; + + bo_reference(&query->bo, NULL); + FREE(query); +} + +static void +brw_query_begin(struct pipe_context *pipe, struct pipe_query *q) +{ + struct brw_context *brw = brw_context(pipe); + struct brw_query_object *query = (struct brw_query_object *)q; + + /* Reset our driver's tracking of query state. */ + bo_reference(&query->bo, NULL); + query->result = 0; + query->first_index = -1; + query->last_index = -1; + + insert_at_head(&brw->query.active_head, query); + brw->query.stats_wm++; + brw->state.dirty.mesa |= PIPE_NEW_QUERY; +} + +static void +brw_query_end(struct pipe_context *pipe, struct pipe_query *q) +{ + struct brw_context *brw = brw_context(pipe); + 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); + brw_context_flush( brw ); + + bo_reference(&brw->query.bo, NULL); + } + + remove_from_list(query); + brw->query.stats_wm--; + brw->state.dirty.mesa |= PIPE_NEW_QUERY; +} + +/*********************************************************************** + * Internal functions and callbacks to implement queries + */ + +/** Called to set up the query BO and account for its aperture space */ +enum pipe_error +brw_prepare_query_begin(struct brw_context *brw) +{ + enum pipe_error ret; + + /* Skip if we're not doing any queries. */ + if (is_empty_list(&brw->query.active_head)) + return PIPE_OK; + + /* 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)) { + + ret = brw->sws->bo_alloc(brw->sws, BRW_BUFFER_TYPE_QUERY, 4096, 1, + &brw->query.bo); + if (ret) + return ret; + + brw->query.index = 0; + } + + brw_add_validated_bo(brw, brw->query.bo); + + return PIPE_OK; +} + +/** Called just before primitive drawing to get a beginning PS_DEPTH_COUNT. */ +void +brw_emit_query_begin(struct brw_context *brw) +{ + 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, + BRW_USAGE_QUERY_RESULT, + 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) { + uint64_t tmp; + + /* Propogate the results from this buffer to all of the + * active queries, as the bo is going away. + */ + if (query->bo != NULL) + brw_query_get_result( &brw->base, + (struct pipe_query *)query, + FALSE, + &tmp ); + + bo_reference( &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) +{ + 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, + BRW_USAGE_QUERY_RESULT, + 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_pipe_query_init( struct brw_context *brw ) +{ + brw->base.create_query = brw_query_create; + brw->base.destroy_query = brw_query_destroy; + brw->base.begin_query = brw_query_begin; + brw->base.end_query = brw_query_end; + brw->base.get_query_result = brw_query_get_result; +} + + +void brw_pipe_query_cleanup( struct brw_context *brw ) +{ + /* Unreference brw->query.bo ?? + */ +} |