src/gallium/drivers/svga/svga_pipe_query.c

   1 /**********************************************************
   2  * Copyright 2008-2009 VMware, Inc.  All rights reserved.
   3  *
   4  * Permission is hereby granted, free of charge, to any person
   5  * obtaining a copy of this software and associated documentation
   6  * files (the "Software"), to deal in the Software without
   7  * restriction, including without limitation the rights to use, copy,
   8  * modify, merge, publish, distribute, sublicense, and/or sell copies
   9  * of the Software, and to permit persons to whom the Software is
  10  * furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice shall be
  13  * included in all copies or substantial portions of the Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  16  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  17  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  18  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  19  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  20  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  21  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  22  * SOFTWARE.
  23  *
  24  **********************************************************/
  25
  26 #include "pipe/p_state.h"
  27 #include "pipe/p_context.h"
  28 #include "util/u_memory.h"
  29
  30 #include "svga_cmd.h"
  31 #include "svga_context.h"
  32 #include "svga_screen.h"
  33 #include "svga_screen_buffer.h"
  34 #include "svga_winsys.h"
  35 #include "svga_draw.h"
  36 #include "svga_debug.h"
  37
  38
  39 /* Fixme: want a public base class for all pipe structs, even if there
  40  * isn't much in them.
  41  */
  42 struct pipe_query {
  43    int dummy;
  44 };
  45
  46 struct svga_query {
  47    struct pipe_query base;
  48    SVGA3dQueryType type;
  49    struct svga_winsys_buffer *hwbuf;
  50    volatile SVGA3dQueryResult *queryResult;
  51    struct pipe_fence_handle *fence;
  52 };
  53
  54 /***********************************************************************
  55  * Inline conversion functions.  These are better-typed than the
  56  * macros used previously:
  57  */
  58 static INLINE struct svga_query *
  59 svga_query( struct pipe_query *q )
  60 {
  61    return (struct svga_query *)q;
  62 }
  63
  64 static boolean svga_get_query_result(struct pipe_context *pipe,
  65                                      struct pipe_query *q,
  66                                      boolean wait,
  67                                      uint64_t *result);
  68
  69 static struct pipe_query *svga_create_query( struct pipe_context *pipe,
  70                                              unsigned query_type )
  71 {
  72    struct svga_screen *svgascreen = svga_screen(pipe->screen);
  73    struct svga_winsys_screen *sws = svgascreen->sws;
  74    struct svga_query *sq;
  75
  76    SVGA_DBG(DEBUG_QUERY, "%s\n", __FUNCTION__);
  77
  78    sq = CALLOC_STRUCT(svga_query);
  79    if (!sq)
  80       goto no_sq;
  81
  82    sq->type = SVGA3D_QUERYTYPE_OCCLUSION;
  83
  84    sq->hwbuf = svga_winsys_buffer_create(svgascreen,
  85                                          1,
  86                                          SVGA_BUFFER_USAGE_PINNED,
  87                                          sizeof *sq->queryResult);
  88    if(!sq->hwbuf)
  89       goto no_hwbuf;
  90
  91    sq->queryResult = (SVGA3dQueryResult *)sws->buffer_map(sws,
  92                                                           sq->hwbuf,
  93                                                           PIPE_BUFFER_USAGE_CPU_WRITE);
  94    if(!sq->queryResult)
  95       goto no_query_result;
  96
  97    sq->queryResult->totalSize = sizeof *sq->queryResult;
  98    sq->queryResult->state = SVGA3D_QUERYSTATE_NEW;
  99
 100    /*
 101     * We request the buffer to be pinned and assume it is always mapped.
 102     *
 103     * The reason is that we don't want to wait for fences when checking the
 104     * query status.
 105     */
 106    sws->buffer_unmap(sws, sq->hwbuf);
 107
 108    return &sq->base;
 109
 110 no_query_result:
 111    sws->buffer_destroy(sws, sq->hwbuf);
 112 no_hwbuf:
 113    FREE(sq);
 114 no_sq:
 115    return NULL;
 116 }
 117
 118 static void svga_destroy_query(struct pipe_context *pipe,
 119                                struct pipe_query *q)
 120 {
 121    struct svga_screen *svgascreen = svga_screen(pipe->screen);
 122    struct svga_winsys_screen *sws = svgascreen->sws;
 123    struct svga_query *sq = svga_query( q );
 124
 125    SVGA_DBG(DEBUG_QUERY, "%s\n", __FUNCTION__);
 126    sws->buffer_destroy(sws, sq->hwbuf);
 127    sws->fence_reference(sws, &sq->fence, NULL);
 128    FREE(sq);
 129 }
 130
 131 static void svga_begin_query(struct pipe_context *pipe,
 132                              struct pipe_query *q)
 133 {
 134    struct svga_screen *svgascreen = svga_screen(pipe->screen);
 135    struct svga_winsys_screen *sws = svgascreen->sws;
 136    struct svga_context *svga = svga_context( pipe );
 137    struct svga_query *sq = svga_query( q );
 138    enum pipe_error ret;
 139
 140    SVGA_DBG(DEBUG_QUERY, "%s\n", __FUNCTION__);
 141
 142    assert(!svga->sq);
 143
 144    /* Need to flush out buffered drawing commands so that they don't
 145     * get counted in the query results.
 146     */
 147    svga_hwtnl_flush_retry(svga);
 148
 149    if(sq->queryResult->state == SVGA3D_QUERYSTATE_PENDING) {
 150       /* The application doesn't care for the pending query result. We cannot
 151        * let go the existing buffer and just get a new one because its storage
 152        * may be reused for other purposes and clobbered by the host when it
 153        * determines the query result. So the only option here is to wait for
 154        * the existing query's result -- not a big deal, given that no sane
 155        * application would do this.
 156        */
 157       uint64_t result;
 158
 159       svga_get_query_result(pipe, q, TRUE, &result);
 160
 161       assert(sq->queryResult->state != SVGA3D_QUERYSTATE_PENDING);
 162    }
 163
 164    sq->queryResult->state = SVGA3D_QUERYSTATE_NEW;
 165    sws->fence_reference(sws, &sq->fence, NULL);
 166
 167    ret = SVGA3D_BeginQuery(svga->swc, sq->type);
 168    if(ret != PIPE_OK) {
 169       svga_context_flush(svga, NULL);
 170       ret = SVGA3D_BeginQuery(svga->swc, sq->type);
 171       assert(ret == PIPE_OK);
 172    }
 173
 174    svga->sq = sq;
 175 }
 176
 177 static void svga_end_query(struct pipe_context *pipe,
 178                            struct pipe_query *q)
 179 {
 180    struct svga_context *svga = svga_context( pipe );
 181    struct svga_query *sq = svga_query( q );
 182    enum pipe_error ret;
 183
 184    SVGA_DBG(DEBUG_QUERY, "%s\n", __FUNCTION__);
 185    assert(svga->sq == sq);
 186
 187    svga_hwtnl_flush_retry(svga);
 188
 189    /* Set to PENDING before sending EndQuery. */
 190    sq->queryResult->state = SVGA3D_QUERYSTATE_PENDING;
 191
 192    ret = SVGA3D_EndQuery( svga->swc, sq->type, sq->hwbuf);
 193    if(ret != PIPE_OK) {
 194       svga_context_flush(svga, NULL);
 195       ret = SVGA3D_EndQuery( svga->swc, sq->type, sq->hwbuf);
 196       assert(ret == PIPE_OK);
 197    }
 198
 199    /* TODO: Delay flushing. We don't really need to flush here, just ensure
 200     * that there is one flush before svga_get_query_result attempts to get the
 201     * result */
 202    svga_context_flush(svga, NULL);
 203
 204    svga->sq = NULL;
 205 }
 206
 207 static boolean svga_get_query_result(struct pipe_context *pipe,
 208                                      struct pipe_query *q,
 209                                      boolean wait,
 210                                      uint64_t *result)
 211 {
 212    struct svga_context *svga = svga_context( pipe );
 213    struct svga_screen *svgascreen = svga_screen( pipe->screen );
 214    struct svga_winsys_screen *sws = svgascreen->sws;
 215    struct svga_query *sq = svga_query( q );
 216    SVGA3dQueryState state;
 217
 218    SVGA_DBG(DEBUG_QUERY, "%s wait: %d\n", __FUNCTION__);
 219
 220    /* The query status won't be updated by the host unless
 221     * SVGA_3D_CMD_WAIT_FOR_QUERY is emitted. Unfortunately this will cause a
 222     * synchronous wait on the host */
 223    if(!sq->fence) {
 224       enum pipe_error ret;
 225
 226       ret = SVGA3D_WaitForQuery( svga->swc, sq->type, sq->hwbuf);
 227       if(ret != PIPE_OK) {
 228          svga_context_flush(svga, NULL);
 229          ret = SVGA3D_WaitForQuery( svga->swc, sq->type, sq->hwbuf);
 230          assert(ret == PIPE_OK);
 231       }
 232
 233       svga_context_flush(svga, &sq->fence);
 234
 235       assert(sq->fence);
 236    }
 237
 238    state = sq->queryResult->state;
 239    if(state == SVGA3D_QUERYSTATE_PENDING) {
 240       if(!wait)
 241          return FALSE;
 242
 243       sws->fence_finish(sws, sq->fence, 0);
 244
 245       state = sq->queryResult->state;
 246    }
 247
 248    assert(state == SVGA3D_QUERYSTATE_SUCCEEDED ||
 249           state == SVGA3D_QUERYSTATE_FAILED);
 250
 251    *result = (uint64_t)sq->queryResult->result32;
 252
 253    SVGA_DBG(DEBUG_QUERY, "%s result %d\n", __FUNCTION__, (unsigned)*result);
 254
 255    return TRUE;
 256 }
 257
 258
 259
 260 void svga_init_query_functions( struct svga_context *svga )
 261 {
 262    svga->pipe.create_query = svga_create_query;
 263    svga->pipe.destroy_query = svga_destroy_query;
 264    svga->pipe.begin_query = svga_begin_query;
 265    svga->pipe.end_query = svga_end_query;
 266    svga->pipe.get_query_result = svga_get_query_result;
 267 }