1 /*
2 * Copyright © 2013 Intel Corporation
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
13 * Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
21 * DEALINGS IN THE SOFTWARE.
22 */
23
24 /**
25 * \file brw_vec4_gs.c
26 *
27 * State atom for client-programmable geometry shaders, and support code.
28 */
29
30 #include "brw_gs.h"
31 #include "brw_context.h"
32 #include "brw_vec4_gs_visitor.h"
33 #include "brw_state.h"
34 #include "brw_ff_gs.h"
35 #include "brw_nir.h"
36 #include "brw_program.h"
37 #include "compiler/glsl/ir_uniform.h"
38
39 static void
brw_gs_debug_recompile(struct brw_context * brw,struct gl_program * prog,const struct brw_gs_prog_key * key)40 brw_gs_debug_recompile(struct brw_context *brw, struct gl_program *prog,
41 const struct brw_gs_prog_key *key)
42 {
43 perf_debug("Recompiling geometry shader for program %d\n", prog->Id);
44
45 bool found = false;
46 const struct brw_gs_prog_key *old_key =
47 brw_find_previous_compile(&brw->cache, BRW_CACHE_GS_PROG,
48 key->program_string_id);
49
50 if (!old_key) {
51 perf_debug(" Didn't find previous compile in the shader cache for "
52 "debug\n");
53 return;
54 }
55
56 found |= brw_debug_recompile_sampler_key(brw, &old_key->tex, &key->tex);
57
58 if (!found) {
59 perf_debug(" Something else\n");
60 }
61 }
62
63 static void
assign_gs_binding_table_offsets(const struct gen_device_info * devinfo,const struct gl_program * prog,struct brw_gs_prog_data * prog_data)64 assign_gs_binding_table_offsets(const struct gen_device_info *devinfo,
65 const struct gl_program *prog,
66 struct brw_gs_prog_data *prog_data)
67 {
68 /* In gen6 we reserve the first BRW_MAX_SOL_BINDINGS entries for transform
69 * feedback surfaces.
70 */
71 uint32_t reserved = devinfo->gen == 6 ? BRW_MAX_SOL_BINDINGS : 0;
72
73 brw_assign_common_binding_table_offsets(devinfo, prog,
74 &prog_data->base.base, reserved);
75 }
76
77 static bool
brw_codegen_gs_prog(struct brw_context * brw,struct brw_program * gp,struct brw_gs_prog_key * key)78 brw_codegen_gs_prog(struct brw_context *brw,
79 struct brw_program *gp,
80 struct brw_gs_prog_key *key)
81 {
82 struct brw_compiler *compiler = brw->screen->compiler;
83 const struct gen_device_info *devinfo = &brw->screen->devinfo;
84 struct brw_stage_state *stage_state = &brw->gs.base;
85 struct brw_gs_prog_data prog_data;
86 bool start_busy = false;
87 double start_time = 0;
88
89 memset(&prog_data, 0, sizeof(prog_data));
90
91 assign_gs_binding_table_offsets(devinfo, &gp->program, &prog_data);
92
93 /* Allocate the references to the uniforms that will end up in the
94 * prog_data associated with the compiled program, and which will be freed
95 * by the state cache.
96 *
97 * Note: param_count needs to be num_uniform_components * 4, since we add
98 * padding around uniform values below vec4 size, so the worst case is that
99 * every uniform is a float which gets padded to the size of a vec4.
100 */
101 int param_count = gp->program.nir->num_uniforms / 4;
102
103 prog_data.base.base.param =
104 rzalloc_array(NULL, const gl_constant_value *, param_count);
105 prog_data.base.base.pull_param =
106 rzalloc_array(NULL, const gl_constant_value *, param_count);
107 prog_data.base.base.image_param =
108 rzalloc_array(NULL, struct brw_image_param,
109 gp->program.info.num_images);
110 prog_data.base.base.nr_params = param_count;
111 prog_data.base.base.nr_image_params = gp->program.info.num_images;
112
113 brw_nir_setup_glsl_uniforms(gp->program.nir, &gp->program,
114 &prog_data.base.base,
115 compiler->scalar_stage[MESA_SHADER_GEOMETRY]);
116
117 uint64_t outputs_written = gp->program.info.outputs_written;
118
119 brw_compute_vue_map(devinfo,
120 &prog_data.base.vue_map, outputs_written,
121 gp->program.info.separate_shader);
122
123 int st_index = -1;
124 if (INTEL_DEBUG & DEBUG_SHADER_TIME)
125 st_index = brw_get_shader_time_index(brw, &gp->program, ST_GS, true);
126
127 if (unlikely(brw->perf_debug)) {
128 start_busy = brw->batch.last_bo && drm_intel_bo_busy(brw->batch.last_bo);
129 start_time = get_time();
130 }
131
132 void *mem_ctx = ralloc_context(NULL);
133 unsigned program_size;
134 char *error_str;
135 const unsigned *program =
136 brw_compile_gs(brw->screen->compiler, brw, mem_ctx, key,
137 &prog_data, gp->program.nir, &gp->program,
138 st_index, &program_size, &error_str);
139 if (program == NULL) {
140 ralloc_strcat(&gp->program.sh.data->InfoLog, error_str);
141 _mesa_problem(NULL, "Failed to compile geometry shader: %s\n", error_str);
142
143 ralloc_free(mem_ctx);
144 return false;
145 }
146
147 if (unlikely(brw->perf_debug)) {
148 if (gp->compiled_once) {
149 brw_gs_debug_recompile(brw, &gp->program, key);
150 }
151 if (start_busy && !drm_intel_bo_busy(brw->batch.last_bo)) {
152 perf_debug("GS compile took %.03f ms and stalled the GPU\n",
153 (get_time() - start_time) * 1000);
154 }
155 gp->compiled_once = true;
156 }
157
158 /* Scratch space is used for register spilling */
159 brw_alloc_stage_scratch(brw, stage_state,
160 prog_data.base.base.total_scratch,
161 devinfo->max_gs_threads);
162
163 brw_upload_cache(&brw->cache, BRW_CACHE_GS_PROG,
164 key, sizeof(*key),
165 program, program_size,
166 &prog_data, sizeof(prog_data),
167 &stage_state->prog_offset, &brw->gs.base.prog_data);
168 ralloc_free(mem_ctx);
169
170 return true;
171 }
172
173 static bool
brw_gs_state_dirty(const struct brw_context * brw)174 brw_gs_state_dirty(const struct brw_context *brw)
175 {
176 return brw_state_dirty(brw,
177 _NEW_TEXTURE,
178 BRW_NEW_GEOMETRY_PROGRAM |
179 BRW_NEW_TRANSFORM_FEEDBACK);
180 }
181
182 void
brw_gs_populate_key(struct brw_context * brw,struct brw_gs_prog_key * key)183 brw_gs_populate_key(struct brw_context *brw,
184 struct brw_gs_prog_key *key)
185 {
186 struct gl_context *ctx = &brw->ctx;
187 struct brw_program *gp = (struct brw_program *) brw->geometry_program;
188
189 memset(key, 0, sizeof(*key));
190
191 key->program_string_id = gp->id;
192
193 /* _NEW_TEXTURE */
194 brw_populate_sampler_prog_key_data(ctx, &gp->program, &key->tex);
195 }
196
197 void
brw_upload_gs_prog(struct brw_context * brw)198 brw_upload_gs_prog(struct brw_context *brw)
199 {
200 struct brw_stage_state *stage_state = &brw->gs.base;
201 struct brw_gs_prog_key key;
202 /* BRW_NEW_GEOMETRY_PROGRAM */
203 struct brw_program *gp = (struct brw_program *) brw->geometry_program;
204
205 if (!brw_gs_state_dirty(brw))
206 return;
207
208 if (gp == NULL) {
209 /* No geometry shader. Vertex data just passes straight through. */
210 if (brw->gen == 6 &&
211 (brw->ctx.NewDriverState & BRW_NEW_TRANSFORM_FEEDBACK)) {
212 gen6_brw_upload_ff_gs_prog(brw);
213 return;
214 }
215
216 /* Other state atoms had better not try to access prog_data, since
217 * there's no GS program.
218 */
219 brw->gs.base.prog_data = NULL;
220
221 return;
222 }
223
224 brw_gs_populate_key(brw, &key);
225
226 if (!brw_search_cache(&brw->cache, BRW_CACHE_GS_PROG,
227 &key, sizeof(key),
228 &stage_state->prog_offset,
229 &brw->gs.base.prog_data)) {
230 bool success = brw_codegen_gs_prog(brw, gp, &key);
231 assert(success);
232 (void)success;
233 }
234 }
235
236 bool
brw_gs_precompile(struct gl_context * ctx,struct gl_program * prog)237 brw_gs_precompile(struct gl_context *ctx, struct gl_program *prog)
238 {
239 struct brw_context *brw = brw_context(ctx);
240 struct brw_gs_prog_key key;
241 uint32_t old_prog_offset = brw->gs.base.prog_offset;
242 struct brw_stage_prog_data *old_prog_data = brw->gs.base.prog_data;
243 bool success;
244
245 struct brw_program *bgp = brw_program(prog);
246
247 memset(&key, 0, sizeof(key));
248
249 brw_setup_tex_for_precompile(brw, &key.tex, prog);
250 key.program_string_id = bgp->id;
251
252 success = brw_codegen_gs_prog(brw, bgp, &key);
253
254 brw->gs.base.prog_offset = old_prog_offset;
255 brw->gs.base.prog_data = old_prog_data;
256
257 return success;
258 }
259