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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_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
     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
     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
     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
    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
    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
    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
    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