1 /*
2 * Copyright (c) 2008-2024 Broadcom. All Rights Reserved.
3 * The term “Broadcom” refers to Broadcom Inc.
4 * and/or its subsidiaries.
5 * SPDX-License-Identifier: MIT
6 */
7
8 #include "svga_cmd.h"
9
10 #include "pipe/p_state.h"
11 #include "pipe/p_defines.h"
12 #include "util/u_inlines.h"
13 #include "util/u_thread.h"
14 #include "util/format/u_format.h"
15 #include "util/u_math.h"
16 #include "util/u_memory.h"
17 #include "util/u_string.h"
18
19 #include "svga_format.h"
20 #include "svga_screen.h"
21 #include "svga_context.h"
22 #include "svga_resource_texture.h"
23 #include "svga_sampler_view.h"
24 #include "svga_debug.h"
25 #include "svga_surface.h"
26
27
28 void
svga_debug_describe_sampler_view(char * buf,const struct svga_sampler_view * sv)29 svga_debug_describe_sampler_view(char *buf, const struct svga_sampler_view *sv)
30 {
31 char res[128];
32 debug_describe_resource(res, sv->texture);
33 sprintf(buf, "svga_sampler_view<%s,[%u,%u]>",
34 res, sv->min_lod, sv->max_lod);
35 }
36
37
38 struct svga_sampler_view *
svga_get_tex_sampler_view(struct pipe_context * pipe,struct pipe_resource * pt,unsigned min_lod,unsigned max_lod)39 svga_get_tex_sampler_view(struct pipe_context *pipe,
40 struct pipe_resource *pt,
41 unsigned min_lod, unsigned max_lod)
42 {
43 struct svga_context *svga = svga_context(pipe);
44 struct svga_screen *ss = svga_screen(pipe->screen);
45 struct svga_texture *tex = svga_texture(pt);
46 struct svga_sampler_view *sv = NULL;
47 SVGA3dSurface1Flags flags = SVGA3D_SURFACE_HINT_TEXTURE;
48 SVGA3dSurfaceFormat format = svga_translate_format(ss, pt->format,
49 PIPE_BIND_SAMPLER_VIEW);
50 bool view = true;
51
52 assert(pt);
53 assert(min_lod <= max_lod);
54 assert(max_lod <= pt->last_level);
55 assert(!svga_have_vgpu10(svga));
56
57 /* Is a view needed */
58 {
59 /*
60 * Can't control max lod. For first level views and when we only
61 * look at one level we disable mip filtering to achive the same
62 * results as a view.
63 */
64 if (min_lod == 0 && max_lod >= pt->last_level)
65 view = false;
66
67 if (ss->debug.no_sampler_view)
68 view = false;
69
70 if (ss->debug.force_sampler_view)
71 view = true;
72 }
73
74 /* First try the cache */
75 if (view) {
76 mtx_lock(&ss->tex_mutex);
77 if (tex->cached_view &&
78 tex->cached_view->min_lod == min_lod &&
79 tex->cached_view->max_lod == max_lod) {
80 svga_sampler_view_reference(&sv, tex->cached_view);
81 mtx_unlock(&ss->tex_mutex);
82 SVGA_DBG(DEBUG_VIEWS, "svga: Sampler view: reuse %p, %u %u, last %u\n",
83 pt, min_lod, max_lod, pt->last_level);
84 svga_validate_sampler_view(svga_context(pipe), sv);
85 return sv;
86 }
87 mtx_unlock(&ss->tex_mutex);
88 }
89
90 sv = CALLOC_STRUCT(svga_sampler_view);
91 if (!sv)
92 return NULL;
93
94 pipe_reference_init(&sv->reference, 1);
95
96 /* Note: we're not refcounting the texture resource here to avoid
97 * a circular dependency.
98 */
99 sv->texture = pt;
100
101 sv->min_lod = min_lod;
102 sv->max_lod = max_lod;
103
104 /* No view needed just use the whole texture */
105 if (!view) {
106 SVGA_DBG(DEBUG_VIEWS,
107 "svga: Sampler view: no %p, mips %u..%u, nr %u, size (%ux%ux%u), last %u\n",
108 pt, min_lod, max_lod,
109 max_lod - min_lod + 1,
110 pt->width0,
111 pt->height0,
112 pt->depth0,
113 pt->last_level);
114 sv->key.cachable = 0;
115 sv->handle = tex->handle;
116 debug_reference(&sv->reference,
117 (debug_reference_descriptor)svga_debug_describe_sampler_view, 0);
118 return sv;
119 }
120
121 SVGA_DBG(DEBUG_VIEWS,
122 "svga: Sampler view: yes %p, mips %u..%u, nr %u, size (%ux%ux%u), last %u\n",
123 pt, min_lod, max_lod,
124 max_lod - min_lod + 1,
125 pt->width0,
126 pt->height0,
127 pt->depth0,
128 pt->last_level);
129
130 sv->age = tex->age;
131 sv->handle = svga_texture_view_surface(svga, tex,
132 PIPE_BIND_SAMPLER_VIEW,
133 flags, format,
134 min_lod,
135 max_lod - min_lod + 1,
136 -1, 1, -1, false,
137 &sv->key);
138
139 if (!sv->handle) {
140 sv->key.cachable = 0;
141 sv->handle = tex->handle;
142 debug_reference(&sv->reference,
143 (debug_reference_descriptor)
144 svga_debug_describe_sampler_view, 0);
145 return sv;
146 }
147
148 mtx_lock(&ss->tex_mutex);
149 svga_sampler_view_reference(&tex->cached_view, sv);
150 mtx_unlock(&ss->tex_mutex);
151
152 debug_reference(&sv->reference,
153 (debug_reference_descriptor)
154 svga_debug_describe_sampler_view, 0);
155
156 return sv;
157 }
158
159
160 void
svga_validate_sampler_view(struct svga_context * svga,struct svga_sampler_view * v)161 svga_validate_sampler_view(struct svga_context *svga,
162 struct svga_sampler_view *v)
163 {
164 struct svga_texture *tex = svga_texture(v->texture);
165 unsigned numFaces;
166 unsigned age = 0;
167 int i;
168 unsigned k;
169
170 assert(svga);
171 assert(!svga_have_vgpu10(svga));
172
173 if (v->handle == tex->handle)
174 return;
175
176 age = tex->age;
177
178 if (tex->b.target == PIPE_TEXTURE_CUBE)
179 numFaces = 6;
180 else
181 numFaces = 1;
182
183 for (i = v->min_lod; i <= v->max_lod; i++) {
184 for (k = 0; k < numFaces; k++) {
185 assert(i < ARRAY_SIZE(tex->view_age));
186 if (v->age < tex->view_age[i])
187 svga_texture_copy_handle(svga,
188 tex->handle, 0, 0, 0, i, k,
189 v->handle, 0, 0, 0, i - v->min_lod, k,
190 u_minify(tex->b.width0, i),
191 u_minify(tex->b.height0, i),
192 u_minify(tex->b.depth0, i));
193 }
194 }
195
196 v->age = age;
197 }
198
199
200 void
svga_destroy_sampler_view_priv(struct svga_sampler_view * v)201 svga_destroy_sampler_view_priv(struct svga_sampler_view *v)
202 {
203 struct svga_texture *tex = svga_texture(v->texture);
204
205 if (v->handle != tex->handle) {
206 struct svga_screen *ss = svga_screen(v->texture->screen);
207 SVGA_DBG(DEBUG_DMA, "unref sid %p (sampler view)\n", v->handle);
208 svga_screen_surface_destroy(ss, &v->key,
209 svga_was_texture_rendered_to(tex),
210 &v->handle);
211 }
212
213 /* Note: we're not refcounting the texture resource here to avoid
214 * a circular dependency.
215 */
216 v->texture = NULL;
217
218 FREE(v);
219 }
220