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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_state.h"
33 #include "brw_ff_gs.h"
34 #include "compiler/brw_nir.h"
35 #include "brw_program.h"
36 #include "compiler/glsl/ir_uniform.h"
37 
38 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)39 assign_gs_binding_table_offsets(const struct gen_device_info *devinfo,
40                                 const struct gl_program *prog,
41                                 struct brw_gs_prog_data *prog_data)
42 {
43    /* In gen6 we reserve the first BRW_MAX_SOL_BINDINGS entries for transform
44     * feedback surfaces.
45     */
46    uint32_t reserved = devinfo->gen == 6 ? BRW_MAX_SOL_BINDINGS : 0;
47 
48    brw_assign_common_binding_table_offsets(devinfo, prog,
49                                            &prog_data->base.base, reserved);
50 }
51 
52 static bool
brw_codegen_gs_prog(struct brw_context * brw,struct brw_program * gp,struct brw_gs_prog_key * key)53 brw_codegen_gs_prog(struct brw_context *brw,
54                     struct brw_program *gp,
55                     struct brw_gs_prog_key *key)
56 {
57    struct brw_compiler *compiler = brw->screen->compiler;
58    const struct gen_device_info *devinfo = &brw->screen->devinfo;
59    struct brw_stage_state *stage_state = &brw->gs.base;
60    struct brw_gs_prog_data prog_data;
61    bool start_busy = false;
62    double start_time = 0;
63 
64    memset(&prog_data, 0, sizeof(prog_data));
65 
66    void *mem_ctx = ralloc_context(NULL);
67 
68    nir_shader *nir = nir_shader_clone(mem_ctx, gp->program.nir);
69 
70    assign_gs_binding_table_offsets(devinfo, &gp->program, &prog_data);
71 
72    brw_nir_setup_glsl_uniforms(mem_ctx, nir, &gp->program,
73                                &prog_data.base.base,
74                                compiler->scalar_stage[MESA_SHADER_GEOMETRY]);
75    brw_nir_analyze_ubo_ranges(compiler, nir, NULL,
76                               prog_data.base.base.ubo_ranges);
77 
78    uint64_t outputs_written = nir->info.outputs_written;
79 
80    brw_compute_vue_map(devinfo,
81                        &prog_data.base.vue_map, outputs_written,
82                        gp->program.info.separate_shader, 1);
83 
84    int st_index = -1;
85    if (INTEL_DEBUG & DEBUG_SHADER_TIME)
86       st_index = brw_get_shader_time_index(brw, &gp->program, ST_GS, true);
87 
88    if (unlikely(brw->perf_debug)) {
89       start_busy = brw->batch.last_bo && brw_bo_busy(brw->batch.last_bo);
90       start_time = get_time();
91    }
92 
93    char *error_str;
94    const unsigned *program =
95       brw_compile_gs(brw->screen->compiler, brw, mem_ctx, key,
96                      &prog_data, nir, &gp->program, st_index,
97                      NULL, &error_str);
98    if (program == NULL) {
99       ralloc_strcat(&gp->program.sh.data->InfoLog, error_str);
100       _mesa_problem(NULL, "Failed to compile geometry shader: %s\n", error_str);
101 
102       ralloc_free(mem_ctx);
103       return false;
104    }
105 
106    if (unlikely(brw->perf_debug)) {
107       if (gp->compiled_once) {
108          brw_debug_recompile(brw, MESA_SHADER_GEOMETRY, gp->program.Id,
109                              &key->base);
110       }
111       if (start_busy && !brw_bo_busy(brw->batch.last_bo)) {
112          perf_debug("GS compile took %.03f ms and stalled the GPU\n",
113                     (get_time() - start_time) * 1000);
114       }
115       gp->compiled_once = true;
116    }
117 
118    /* Scratch space is used for register spilling */
119    brw_alloc_stage_scratch(brw, stage_state,
120                            prog_data.base.base.total_scratch);
121 
122    /* The param and pull_param arrays will be freed by the shader cache. */
123    ralloc_steal(NULL, prog_data.base.base.param);
124    ralloc_steal(NULL, prog_data.base.base.pull_param);
125    brw_upload_cache(&brw->cache, BRW_CACHE_GS_PROG,
126                     key, sizeof(*key),
127                     program, prog_data.base.base.program_size,
128                     &prog_data, sizeof(prog_data),
129                     &stage_state->prog_offset, &brw->gs.base.prog_data);
130    ralloc_free(mem_ctx);
131 
132    return true;
133 }
134 
135 static bool
brw_gs_state_dirty(const struct brw_context * brw)136 brw_gs_state_dirty(const struct brw_context *brw)
137 {
138    return brw_state_dirty(brw,
139                           _NEW_TEXTURE,
140                           BRW_NEW_GEOMETRY_PROGRAM |
141                           BRW_NEW_TRANSFORM_FEEDBACK);
142 }
143 
144 void
brw_gs_populate_key(struct brw_context * brw,struct brw_gs_prog_key * key)145 brw_gs_populate_key(struct brw_context *brw,
146                     struct brw_gs_prog_key *key)
147 {
148    struct gl_context *ctx = &brw->ctx;
149    struct brw_program *gp =
150       (struct brw_program *) brw->programs[MESA_SHADER_GEOMETRY];
151 
152    memset(key, 0, sizeof(*key));
153 
154    brw_populate_base_prog_key(ctx, gp, &key->base);
155 }
156 
157 void
brw_upload_gs_prog(struct brw_context * brw)158 brw_upload_gs_prog(struct brw_context *brw)
159 {
160    struct brw_stage_state *stage_state = &brw->gs.base;
161    struct brw_gs_prog_key key;
162    /* BRW_NEW_GEOMETRY_PROGRAM */
163    struct brw_program *gp =
164       (struct brw_program *) brw->programs[MESA_SHADER_GEOMETRY];
165 
166    if (!brw_gs_state_dirty(brw))
167       return;
168 
169    brw_gs_populate_key(brw, &key);
170 
171    if (brw_search_cache(&brw->cache, BRW_CACHE_GS_PROG, &key, sizeof(key),
172                         &stage_state->prog_offset, &brw->gs.base.prog_data,
173                         true))
174       return;
175 
176    if (brw_disk_cache_upload_program(brw, MESA_SHADER_GEOMETRY))
177       return;
178 
179    gp = (struct brw_program *) brw->programs[MESA_SHADER_GEOMETRY];
180    gp->id = key.base.program_string_id;
181 
182    ASSERTED bool success = brw_codegen_gs_prog(brw, gp, &key);
183    assert(success);
184 }
185 
186 void
brw_gs_populate_default_key(const struct brw_compiler * compiler,struct brw_gs_prog_key * key,struct gl_program * prog)187 brw_gs_populate_default_key(const struct brw_compiler *compiler,
188                             struct brw_gs_prog_key *key,
189                             struct gl_program *prog)
190 {
191    const struct gen_device_info *devinfo = compiler->devinfo;
192 
193    memset(key, 0, sizeof(*key));
194 
195    brw_populate_default_base_prog_key(devinfo, brw_program(prog),
196                                       &key->base);
197 }
198 
199 bool
brw_gs_precompile(struct gl_context * ctx,struct gl_program * prog)200 brw_gs_precompile(struct gl_context *ctx, struct gl_program *prog)
201 {
202    struct brw_context *brw = brw_context(ctx);
203    struct brw_gs_prog_key key;
204    uint32_t old_prog_offset = brw->gs.base.prog_offset;
205    struct brw_stage_prog_data *old_prog_data = brw->gs.base.prog_data;
206    bool success;
207 
208    struct brw_program *bgp = brw_program(prog);
209 
210    brw_gs_populate_default_key(brw->screen->compiler, &key, prog);
211 
212    success = brw_codegen_gs_prog(brw, bgp, &key);
213 
214    brw->gs.base.prog_offset = old_prog_offset;
215    brw->gs.base.prog_data = old_prog_data;
216 
217    return success;
218 }
219