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_resource_buffer.h"
  34 #include "svga_winsys.h"
  35 #include "svga_debug.h"
  36
  37
  38 /* Fixme: want a public base class for all pipe structs, even if there
  39  * isn't much in them.
  40  */
  41 struct pipe_query {
  42    int dummy;
  43 };
  44
  45 struct svga_query {
  46    struct pipe_query base;
  47    SVGA3dQueryType type;
  48    struct svga_winsys_buffer *hwbuf;
  49    volatile SVGA3dQueryResult *queryResult;
  50    struct pipe_fence_handle *fence;
  51 };
  52
  53 /***********************************************************************
  54  * Inline conversion functions.  These are better-typed than the
  55  * macros used previously:
  56  */
  57 static INLINE struct svga_query *
  58 svga_query( struct pipe_query *q )
  59 {
  60    return (struct svga_query *)q;
  61 }
  62
  63 static boolean svga_get_query_result(struct pipe_context *pipe,
  64                                      struct pipe_query *q,
  65                                      boolean wait,
  66                                      uint64_t *result);
  67
  68 static struct pipe_query *svga_create_query( struct pipe_context *pipe,
  69                                              unsigned query_type )
  70 {
  71    struct svga_screen *svgascreen = svga_screen(pipe->screen);
  72    struct svga_winsys_screen *sws = svgascreen->sws;
  73    struct svga_query *sq;
  74
  75    SVGA_DBG(DEBUG_QUERY, "%s\n", __FUNCTION__);
  76
  77    sq = CALLOC_STRUCT(svga_query);
  78    if (!sq)
  79       goto no_sq;
  80
  81    sq->type = SVGA3D_QUERYTYPE_OCCLUSION;
  82
  83    sq->hwbuf = svga_winsys_buffer_create(svgascreen,
  84                                          1,
  85                                          SVGA_BUFFER_USAGE_PINNED,
  86                                          sizeof *sq->queryResult);
  87    if(!sq->hwbuf)
  88       goto no_hwbuf;
  89
  90    sq->queryResult = (SVGA3dQueryResult *)sws->buffer_map(sws,
  91                                                           sq->hwbuf,
  92                                                           PIPE_TRANSFER_WRITE);
  93    if(!sq->queryResult)
  94       goto no_query_result;
  95
  96    sq->queryResult->totalSize = sizeof *sq->queryResult;
  97    sq->queryResult->state = SVGA3D_QUERYSTATE_NEW;
  98
  99    /*
 100     * We request the buffer to be pinned and assume it is always mapped.
 101     *
 102     * The reason is that we don't want to wait for fences when checking the
 103     * query status.
 104     */
 105    sws->buffer_unmap(sws, sq->hwbuf);
 106
 107    return &sq->base;
 108
 109 no_query_result:
 110    sws->buffer_destroy(sws, sq->hwbuf);
 111 no_hwbuf:
 112    FREE(sq);
 113 no_sq:
 114    return NULL;
 115 }
 116
 117 static void svga_destroy_query(struct pipe_context *pipe,
 118                                struct pipe_query *q)
 119 {
 120    struct svga_screen *svgascreen = svga_screen(pipe->screen);
 121    struct svga_winsys_screen *sws = svgascreen->sws;
 122    struct svga_query *sq = svga_query( q );
 123
 124    SVGA_DBG(DEBUG_QUERY, "%s\n", __FUNCTION__);
 125    sws->buffer_destroy(sws, sq->hwbuf);
 126    sws->fence_reference(sws, &sq->fence, NULL);
 127    FREE(sq);
 128 }
 129
 130 static void svga_begin_query(struct pipe_context *pipe,
 131                              struct pipe_query *q)
 132 {
 133    struct svga_screen *svgascreen = svga_screen(pipe->screen);
 134    struct svga_winsys_screen *sws = svgascreen->sws;
 135    struct svga_context *svga = svga_context( pipe );
 136    struct svga_query *sq = svga_query( q );
 137    enum pipe_error ret;
 138
 139    SVGA_DBG(DEBUG_QUERY, "%s\n", __FUNCTION__);
 140
 141    assert(!svga->sq);
 142
 143    /* Need to flush out buffered drawing commands so that they don't
 144     * get counted in the query results.
 145     */
 146    svga_hwtnl_flush_retry(svga);
 147
 148    if(sq->queryResult->state == SVGA3D_QUERYSTATE_PENDING) {
 149       /* The application doesn't care for the pending query result. We cannot
 150        * let go the existing buffer and just get a new one because its storage
 151        * may be reused for other purposes and clobbered by the host when it
 152        * determines the query result. So the only option here is to wait for
 153        * the existing query's result -- not a big deal, given that no sane
 154        * application would do this.
 155        */
 156       uint64_t result;
 157
 158       svga_get_query_result(pipe, q, TRUE, &result);
 159
 160       assert(sq->queryResult->state != SVGA3D_QUERYSTATE_PENDING);
 161    }
 162
 163    sq->queryResult->state = SVGA3D_QUERYSTATE_NEW;
 164    sws->fence_reference(sws, &sq->fence, NULL);
 165
 166    ret = SVGA3D_BeginQuery(svga->swc, sq->type);
 167    if(ret != PIPE_OK) {
 168       svga_context_flush(svga, NULL);
 169       ret = SVGA3D_BeginQuery(svga->swc, sq->type);
 170       assert(ret == PIPE_OK);
 171    }
 172
 173    svga->sq = sq;
 174 }
 175
 176 static void svga_end_query(struct pipe_context *pipe,
 177                            struct pipe_query *q)
 178 {
 179    struct svga_context *svga = svga_context( pipe );
 180    struct svga_query *sq = svga_query( q );
 181    enum pipe_error ret;
 182
 183    SVGA_DBG(DEBUG_QUERY, "%s\n", __FUNCTION__);
 184    assert(svga->sq == sq);
 185
 186    svga_hwtnl_flush_retry(svga);
 187
 188    /* Set to PENDING before sending EndQuery. */
 189    sq->queryResult->state = SVGA3D_QUERYSTATE_PENDING;
 190
 191    ret = SVGA3D_EndQuery( svga->swc, sq->type, sq->hwbuf);
 192    if(ret != PIPE_OK) {
 193       svga_context_flush(svga, NULL);
 194       ret = SVGA3D_EndQuery( svga->swc, sq->type, sq->hwbuf);
 195       assert(ret == PIPE_OK);
 196    }
 197
 198    /* TODO: Delay flushing. We don't really need to flush here, just ensure
 199     * that there is one flush before svga_get_query_result attempts to get the
 200     * result */
 201    svga_context_flush(svga, NULL);
 202
 203    svga->sq = NULL;
 204 }
 205
 206 static boolean svga_get_query_result(struct pipe_context *pipe,
 207                                      struct pipe_query *q,
 208                                      boolean wait,
 209                                      uint64_t *result)
 210 {
 211    struct svga_context *svga = svga_context( pipe );
 212    struct svga_screen *svgascreen = svga_screen( pipe->screen );
 213    struct svga_winsys_screen *sws = svgascreen->sws;
 214    struct svga_query *sq = svga_query( q );
 215    SVGA3dQueryState state;
 216
 217    SVGA_DBG(DEBUG_QUERY, "%s wait: %d\n", __FUNCTION__);
 218
 219    /* The query status won't be updated by the host unless
 220     * SVGA_3D_CMD_WAIT_FOR_QUERY is emitted. Unfortunately this will cause a
 221     * synchronous wait on the host */
 222    if(!sq->fence) {
 223       enum pipe_error ret;
 224
 225       ret = SVGA3D_WaitForQuery( svga->swc, sq->type, sq->hwbuf);
 226       if(ret != PIPE_OK) {
 227          svga_context_flush(svga, NULL);
 228          ret = SVGA3D_WaitForQuery( svga->swc, sq->type, sq->hwbuf);
 229          assert(ret == PIPE_OK);
 230       }
 231
 232       svga_context_flush(svga, &sq->fence);
 233
 234       assert(sq->fence);
 235    }
 236
 237    state = sq->queryResult->state;
 238    if(state == SVGA3D_QUERYSTATE_PENDING) {
 239       if(!wait)
 240          return FALSE;
 241
 242       sws->fence_finish(sws, sq->fence, 0);
 243
 244       state = sq->queryResult->state;
 245    }
 246
 247    assert(state == SVGA3D_QUERYSTATE_SUCCEEDED ||
 248           state == SVGA3D_QUERYSTATE_FAILED);
 249
 250    *result = (uint64_t)sq->queryResult->result32;
 251
 252    SVGA_DBG(DEBUG_QUERY, "%s result %d\n", __FUNCTION__, (unsigned)*result);
 253
 254    return TRUE;
 255 }
 256
 257
 258
 259 void svga_init_query_functions( struct svga_context *svga )
 260 {
 261    svga->pipe.create_query = svga_create_query;
 262    svga->pipe.destroy_query = svga_destroy_query;
 263    svga->pipe.begin_query = svga_begin_query;
 264    svga->pipe.end_query = svga_end_query;
 265    svga->pipe.get_query_result = svga_get_query_result;
 266 }