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 *
svga_query(struct pipe_query * q)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                                      union pipe_query_result *result);
67 
svga_create_query(struct pipe_context * pipe,unsigned query_type)68 static struct pipe_query *svga_create_query( struct pipe_context *pipe,
69                                              unsigned query_type )
70 {
71    struct svga_context *svga = svga_context( pipe );
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(svga,
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_TRANSFER_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 
svga_destroy_query(struct pipe_context * pipe,struct pipe_query * q)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 
svga_begin_query(struct pipe_context * pipe,struct pipe_query * q)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, (void*)&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 
svga_end_query(struct pipe_context * pipe,struct pipe_query * q)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 
svga_get_query_result(struct pipe_context * pipe,struct pipe_query * q,boolean wait,union pipe_query_result * vresult)207 static boolean svga_get_query_result(struct pipe_context *pipe,
208                                      struct pipe_query *q,
209                                      boolean wait,
210                                      union pipe_query_result *vresult)
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    uint64_t *result = (uint64_t*)vresult;
218 
219    SVGA_DBG(DEBUG_QUERY, "%s wait: %d\n", __FUNCTION__);
220 
221    /* The query status won't be updated by the host unless
222     * SVGA_3D_CMD_WAIT_FOR_QUERY is emitted. Unfortunately this will cause a
223     * synchronous wait on the host */
224    if(!sq->fence) {
225       enum pipe_error ret;
226 
227       ret = SVGA3D_WaitForQuery( svga->swc, sq->type, sq->hwbuf);
228       if(ret != PIPE_OK) {
229          svga_context_flush(svga, NULL);
230          ret = SVGA3D_WaitForQuery( svga->swc, sq->type, sq->hwbuf);
231          assert(ret == PIPE_OK);
232       }
233 
234       svga_context_flush(svga, &sq->fence);
235 
236       assert(sq->fence);
237    }
238 
239    state = sq->queryResult->state;
240    if(state == SVGA3D_QUERYSTATE_PENDING) {
241       if(!wait)
242          return FALSE;
243 
244       sws->fence_finish(sws, sq->fence, SVGA_FENCE_FLAG_QUERY);
245 
246       state = sq->queryResult->state;
247    }
248 
249    assert(state == SVGA3D_QUERYSTATE_SUCCEEDED ||
250           state == SVGA3D_QUERYSTATE_FAILED);
251 
252    *result = (uint64_t)sq->queryResult->result32;
253 
254    SVGA_DBG(DEBUG_QUERY, "%s result %d\n", __FUNCTION__, (unsigned)*result);
255 
256    return TRUE;
257 }
258 
259 
260 
svga_init_query_functions(struct svga_context * svga)261 void svga_init_query_functions( struct svga_context *svga )
262 {
263    svga->pipe.create_query = svga_create_query;
264    svga->pipe.destroy_query = svga_destroy_query;
265    svga->pipe.begin_query = svga_begin_query;
266    svga->pipe.end_query = svga_end_query;
267    svga->pipe.get_query_result = svga_get_query_result;
268 }
269