1/**********************************************************
2 * Copyright 2009-2015 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
27#include "svga_cmd.h"
28#include "util/u_debug.h"
29#include "util/u_memory.h"
30
31#include "vmw_context.h"
32#include "vmw_shader.h"
33#include "vmw_buffer.h"
34#include "vmw_screen.h"
35
36void
37vmw_svga_winsys_shader_reference(struct vmw_svga_winsys_shader **pdst,
38                                 struct vmw_svga_winsys_shader *src)
39{
40   struct pipe_reference *src_ref;
41   struct pipe_reference *dst_ref;
42   struct vmw_svga_winsys_shader *dst;
43
44   if(pdst == NULL || *pdst == src)
45      return;
46
47   dst = *pdst;
48
49   src_ref = src ? &src->refcnt : NULL;
50   dst_ref = dst ? &dst->refcnt : NULL;
51
52   if (pipe_reference(dst_ref, src_ref)) {
53      struct svga_winsys_screen *sws = &dst->screen->base;
54
55      if (!sws->have_vgpu10)
56         vmw_ioctl_shader_destroy(dst->screen, dst->shid);
57#ifdef DEBUG
58      /* to detect dangling pointers */
59      assert(p_atomic_read(&dst->validated) == 0);
60      dst->shid = SVGA3D_INVALID_ID;
61#endif
62      sws->buffer_destroy(sws, dst->buf);
63      FREE(dst);
64   }
65
66   *pdst = src;
67}
68
69
70/**
71 * A helper function to create a shader object and upload the
72 * shader bytecode and signature if specified to the shader memory.
73 */
74struct vmw_svga_winsys_shader *
75vmw_svga_shader_create(struct svga_winsys_screen *sws,
76                       SVGA3dShaderType type,
77                       const uint32 *bytecode,
78                       uint32 bytecodeLen,
79                       const SVGA3dDXShaderSignatureHeader *sgnInfo,
80                       uint32 sgnLen)
81{
82   struct vmw_svga_winsys_shader *shader;
83   void *map;
84
85   shader = CALLOC_STRUCT(vmw_svga_winsys_shader);
86   if (!shader)
87      return NULL;
88
89   pipe_reference_init(&shader->refcnt, 1);
90   p_atomic_set(&shader->validated, 0);
91   shader->screen = vmw_winsys_screen(sws);
92   shader->buf = sws->buffer_create(sws, 64,
93                                    SVGA_BUFFER_USAGE_SHADER,
94                                    bytecodeLen + sgnLen);
95   if (!shader->buf) {
96      FREE(shader);
97      return NULL;
98   }
99
100   map = sws->buffer_map(sws, shader->buf, PIPE_MAP_WRITE);
101   if (!map) {
102      FREE(shader);
103      return NULL;
104   }
105
106   /* copy the shader bytecode */
107   memcpy(map, bytecode, bytecodeLen);
108
109   /* if shader signature is specified, append it to the bytecode. */
110   if (sgnLen) {
111      assert(sws->have_sm5);
112      map = (char *)map + bytecodeLen;
113      memcpy(map, sgnInfo, sgnLen);
114   }
115   sws->buffer_unmap(sws, shader->buf);
116
117   return shader;
118}
119