src/gallium/drivers/iris/iris_draw.c

   1 /*
   2  * Copyright © 2017 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 shall be included
  12  * in all copies or substantial portions of the Software.
  13  *
  14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  15  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  17  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  18  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  19  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  20  * DEALINGS IN THE SOFTWARE.
  21  */
  22
  23 /**
  24  * @file iris_draw.c
  25  *
  26  * The main driver hooks for drawing and launching compute shaders.
  27  */
  28
  29 #include <stdio.h>
  30 #include <errno.h>
  31 #include "pipe/p_defines.h"
  32 #include "pipe/p_state.h"
  33 #include "pipe/p_context.h"
  34 #include "pipe/p_screen.h"
  35 #include "util/u_inlines.h"
  36 #include "util/u_transfer.h"
  37 #include "util/u_upload_mgr.h"
  38 #include "intel/compiler/brw_compiler.h"
  39 #include "intel/compiler/brw_eu_defines.h"
  40 #include "iris_context.h"
  41 #include "iris_defines.h"
  42
  43 static bool
  44 prim_is_points_or_lines(const struct pipe_draw_info *draw)
  45 {
  46    /* We don't need to worry about adjacency - it can only be used with
  47     * geometry shaders, and we don't care about this info when GS is on.
  48     */
  49    return draw->mode == PIPE_PRIM_POINTS ||
  50           draw->mode == PIPE_PRIM_LINES ||
  51           draw->mode == PIPE_PRIM_LINE_LOOP ||
  52           draw->mode == PIPE_PRIM_LINE_STRIP;
  53 }
  54
  55 /**
  56  * Record the current primitive mode and restart information, flagging
  57  * related packets as dirty if necessary.
  58  *
  59  * This must be called before updating compiled shaders, because the patch
  60  * information informs the TCS key.
  61  */
  62 static void
  63 iris_update_draw_info(struct iris_context *ice,
  64                       const struct pipe_draw_info *info)
  65 {
  66    struct iris_screen *screen = (struct iris_screen *)ice->ctx.screen;
  67    const struct brw_compiler *compiler = screen->compiler;
  68
  69    if (ice->state.prim_mode != info->mode) {
  70       ice->state.prim_mode = info->mode;
  71       ice->state.dirty |= IRIS_DIRTY_VF_TOPOLOGY;
  72
  73
  74       /* For XY Clip enables */
  75       bool points_or_lines = prim_is_points_or_lines(info);
  76       if (points_or_lines != ice->state.prim_is_points_or_lines) {
  77          ice->state.prim_is_points_or_lines = points_or_lines;
  78          ice->state.dirty |= IRIS_DIRTY_CLIP;
  79       }
  80    }
  81
  82    if (info->mode == PIPE_PRIM_PATCHES &&
  83        ice->state.vertices_per_patch != info->vertices_per_patch) {
  84       ice->state.vertices_per_patch = info->vertices_per_patch;
  85       ice->state.dirty |= IRIS_DIRTY_VF_TOPOLOGY;
  86
  87       /* 8_PATCH TCS needs this for key->input_vertices */
  88       if (compiler->use_tcs_8_patch)
  89          ice->state.dirty |= IRIS_DIRTY_UNCOMPILED_TCS;
  90
  91       /* Flag constants dirty for gl_PatchVerticesIn if needed. */
  92       const struct shader_info *tcs_info =
  93          iris_get_shader_info(ice, MESA_SHADER_TESS_CTRL);
  94       if (tcs_info &&
  95           tcs_info->system_values_read & (1ull << SYSTEM_VALUE_VERTICES_IN)) {
  96          ice->state.dirty |= IRIS_DIRTY_CONSTANTS_TCS;
  97          ice->state.shaders[MESA_SHADER_TESS_CTRL].sysvals_need_upload = true;
  98       }
  99    }
 100
 101    if (ice->state.primitive_restart != info->primitive_restart ||
 102        ice->state.cut_index != info->restart_index) {
 103       ice->state.dirty |= IRIS_DIRTY_VF;
 104       ice->state.primitive_restart = info->primitive_restart;
 105       ice->state.cut_index = info->restart_index;
 106    }
 107 }
 108
 109 /**
 110  * Update shader draw parameters, flagging VF packets as dirty if necessary.
 111  */
 112 static void
 113 iris_update_draw_parameters(struct iris_context *ice,
 114                             const struct pipe_draw_info *info)
 115 {
 116    bool changed = false;
 117
 118    if (ice->state.vs_uses_draw_params) {
 119       struct iris_state_ref *draw_params = &ice->draw.draw_params;
 120
 121       if (info->indirect) {
 122          pipe_resource_reference(&draw_params->res, info->indirect->buffer);
 123          draw_params->offset =
 124             info->indirect->offset + (info->index_size ? 12 : 8);
 125
 126          changed = true;
 127          ice->draw.params_valid = false;
 128       } else {
 129          int firstvertex = info->index_size ? info->index_bias : info->start;
 130
 131          if (!ice->draw.params_valid ||
 132              ice->draw.params.firstvertex != firstvertex ||
 133              ice->draw.params.baseinstance != info->start_instance) {
 134
 135             changed = true;
 136             ice->draw.params.firstvertex = firstvertex;
 137             ice->draw.params.baseinstance = info->start_instance;
 138             ice->draw.params_valid = true;
 139
 140             u_upload_data(ice->ctx.stream_uploader, 0,
 141                           sizeof(ice->draw.params), 4, &ice->draw.params,
 142                           &draw_params->offset, &draw_params->res);
 143          }
 144       }
 145    }
 146
 147    if (ice->state.vs_uses_derived_draw_params) {
 148       struct iris_state_ref *derived_params = &ice->draw.derived_draw_params;
 149       int is_indexed_draw = info->index_size ? -1 : 0;
 150
 151       if (ice->draw.derived_params.drawid != info->drawid ||
 152           ice->draw.derived_params.is_indexed_draw != is_indexed_draw) {
 153
 154          changed = true;
 155          ice->draw.derived_params.drawid = info->drawid;
 156          ice->draw.derived_params.is_indexed_draw = is_indexed_draw;
 157
 158          u_upload_data(ice->ctx.stream_uploader, 0,
 159                        sizeof(ice->draw.derived_params), 4,
 160                        &ice->draw.derived_params,
 161                        &derived_params->offset, &derived_params->res);
 162       }
 163    }
 164
 165    if (changed) {
 166       ice->state.dirty |= IRIS_DIRTY_VERTEX_BUFFERS |
 167                           IRIS_DIRTY_VERTEX_ELEMENTS |
 168                           IRIS_DIRTY_VF_SGVS;
 169    }
 170 }
 171
 172 static void
 173 iris_indirect_draw_vbo(struct iris_context *ice,
 174                        const struct pipe_draw_info *dinfo)
 175 {
 176    struct iris_batch *batch = &ice->batches[IRIS_BATCH_RENDER];
 177    struct pipe_draw_info info = *dinfo;
 178
 179    if (info.indirect->indirect_draw_count &&
 180        ice->state.predicate == IRIS_PREDICATE_STATE_USE_BIT) {
 181       /* Upload MI_PREDICATE_RESULT to GPR15.*/
 182       batch->screen->vtbl.load_register_reg64(batch, CS_GPR(15), MI_PREDICATE_RESULT);
 183    }
 184
 185    uint64_t orig_dirty = ice->state.dirty;
 186
 187    for (int i = 0; i < info.indirect->draw_count; i++) {
 188       info.drawid = i;
 189
 190       iris_batch_maybe_flush(batch, 1500);
 191
 192       iris_update_draw_parameters(ice, &info);
 193
 194       batch->screen->vtbl.upload_render_state(ice, batch, &info);
 195
 196       ice->state.dirty &= ~IRIS_ALL_DIRTY_FOR_RENDER;
 197
 198       info.indirect->offset += info.indirect->stride;
 199    }
 200
 201    if (info.indirect->indirect_draw_count &&
 202        ice->state.predicate == IRIS_PREDICATE_STATE_USE_BIT) {
 203       /* Restore MI_PREDICATE_RESULT. */
 204       batch->screen->vtbl.load_register_reg64(batch, MI_PREDICATE_RESULT, CS_GPR(15));
 205    }
 206
 207    /* Put this back for post-draw resolves, we'll clear it again after. */
 208    ice->state.dirty = orig_dirty;
 209 }
 210
 211 static void
 212 iris_simple_draw_vbo(struct iris_context *ice,
 213                      const struct pipe_draw_info *draw)
 214 {
 215    struct iris_batch *batch = &ice->batches[IRIS_BATCH_RENDER];
 216
 217    iris_batch_maybe_flush(batch, 1500);
 218
 219    iris_update_draw_parameters(ice, draw);
 220
 221    batch->screen->vtbl.upload_render_state(ice, batch, draw);
 222 }
 223
 224 /**
 225  * The pipe->draw_vbo() driver hook.  Performs a draw on the GPU.
 226  */
 227 void
 228 iris_draw_vbo(struct pipe_context *ctx, const struct pipe_draw_info *info)
 229 {
 230    struct iris_context *ice = (struct iris_context *) ctx;
 231    struct iris_screen *screen = (struct iris_screen*)ice->ctx.screen;
 232    const struct gen_device_info *devinfo = &screen->devinfo;
 233    struct iris_batch *batch = &ice->batches[IRIS_BATCH_RENDER];
 234
 235    if (ice->state.predicate == IRIS_PREDICATE_STATE_DONT_RENDER)
 236       return;
 237
 238    /* We can't safely re-emit 3DSTATE_SO_BUFFERS because it may zero the
 239     * write offsets, changing the behavior.
 240     */
 241    if (unlikely(INTEL_DEBUG & DEBUG_REEMIT))
 242       ice->state.dirty |= IRIS_ALL_DIRTY_FOR_RENDER & ~IRIS_DIRTY_SO_BUFFERS;
 243
 244    iris_update_draw_info(ice, info);
 245
 246    if (devinfo->gen == 9)
 247       gen9_toggle_preemption(ice, batch, info);
 248
 249    iris_update_compiled_shaders(ice);
 250
 251    if (ice->state.dirty & IRIS_DIRTY_RENDER_RESOLVES_AND_FLUSHES) {
 252       bool draw_aux_buffer_disabled[BRW_MAX_DRAW_BUFFERS] = { };
 253       for (gl_shader_stage stage = 0; stage < MESA_SHADER_COMPUTE; stage++) {
 254          if (ice->shaders.prog[stage])
 255             iris_predraw_resolve_inputs(ice, batch, draw_aux_buffer_disabled,
 256                                         stage, true);
 257       }
 258       iris_predraw_resolve_framebuffer(ice, batch, draw_aux_buffer_disabled);
 259    }
 260
 261    iris_binder_reserve_3d(ice);
 262
 263    batch->screen->vtbl.update_surface_base_address(batch, &ice->state.binder);
 264
 265    iris_handle_always_flush_cache(batch);
 266
 267    if (info->indirect)
 268       iris_indirect_draw_vbo(ice, info);
 269    else
 270       iris_simple_draw_vbo(ice, info);
 271
 272    iris_handle_always_flush_cache(batch);
 273
 274    iris_postdraw_update_resolve_tracking(ice, batch);
 275
 276    ice->state.dirty &= ~IRIS_ALL_DIRTY_FOR_RENDER;
 277 }
 278
 279 static void
 280 iris_update_grid_size_resource(struct iris_context *ice,
 281                                const struct pipe_grid_info *grid)
 282 {
 283    const struct iris_screen *screen = (void *) ice->ctx.screen;
 284    const struct isl_device *isl_dev = &screen->isl_dev;
 285    struct iris_state_ref *grid_ref = &ice->state.grid_size;
 286    struct iris_state_ref *state_ref = &ice->state.grid_surf_state;
 287
 288    const struct iris_compiled_shader *shader = ice->shaders.prog[MESA_SHADER_COMPUTE];
 289    bool grid_needs_surface = shader->bt.used_mask[IRIS_SURFACE_GROUP_CS_WORK_GROUPS];
 290    bool grid_updated = false;
 291
 292    if (grid->indirect) {
 293       pipe_resource_reference(&grid_ref->res, grid->indirect);
 294       grid_ref->offset = grid->indirect_offset;
 295
 296       /* Zero out the grid size so that the next non-indirect grid launch will
 297        * re-upload it properly.
 298        */
 299       memset(ice->state.last_grid, 0, sizeof(ice->state.last_grid));
 300       grid_updated = true;
 301    } else if (memcmp(ice->state.last_grid, grid->grid, sizeof(grid->grid)) != 0) {
 302       memcpy(ice->state.last_grid, grid->grid, sizeof(grid->grid));
 303       u_upload_data(ice->state.dynamic_uploader, 0, sizeof(grid->grid), 4,
 304                     grid->grid, &grid_ref->offset, &grid_ref->res);
 305       grid_updated = true;
 306    }
 307
 308    /* If we changed the grid, the old surface state is invalid. */
 309    if (grid_updated)
 310       pipe_resource_reference(&state_ref->res, NULL);
 311
 312    /* Skip surface upload if we don't need it or we already have one */
 313    if (!grid_needs_surface || state_ref->res)
 314       return;
 315
 316    struct iris_bo *grid_bo = iris_resource_bo(grid_ref->res);
 317
 318    void *surf_map = NULL;
 319    u_upload_alloc(ice->state.surface_uploader, 0, isl_dev->ss.size,
 320                   isl_dev->ss.align, &state_ref->offset, &state_ref->res,
 321                   &surf_map);
 322    state_ref->offset +=
 323       iris_bo_offset_from_base_address(iris_resource_bo(state_ref->res));
 324    isl_buffer_fill_state(&screen->isl_dev, surf_map,
 325                          .address = grid_ref->offset + grid_bo->gtt_offset,
 326                          .size_B = sizeof(grid->grid),
 327                          .format = ISL_FORMAT_RAW,
 328                          .stride_B = 1,
 329                          .mocs = iris_mocs(grid_bo, isl_dev));
 330
 331    ice->state.dirty |= IRIS_DIRTY_BINDINGS_CS;
 332 }
 333
 334 void
 335 iris_launch_grid(struct pipe_context *ctx, const struct pipe_grid_info *grid)
 336 {
 337    struct iris_context *ice = (struct iris_context *) ctx;
 338    struct iris_batch *batch = &ice->batches[IRIS_BATCH_COMPUTE];
 339
 340    if (ice->state.predicate == IRIS_PREDICATE_STATE_DONT_RENDER)
 341       return;
 342
 343    if (unlikely(INTEL_DEBUG & DEBUG_REEMIT))
 344       ice->state.dirty |= IRIS_ALL_DIRTY_FOR_COMPUTE;
 345
 346    /* We can't do resolves on the compute engine, so awkwardly, we have to
 347     * do them on the render batch...
 348     */
 349    if (ice->state.dirty & IRIS_DIRTY_COMPUTE_RESOLVES_AND_FLUSHES) {
 350       iris_predraw_resolve_inputs(ice, &ice->batches[IRIS_BATCH_RENDER], NULL,
 351                                   MESA_SHADER_COMPUTE, false);
 352    }
 353
 354    iris_batch_maybe_flush(batch, 1500);
 355
 356    iris_update_compiled_compute_shader(ice);
 357
 358    if (memcmp(ice->state.last_block, grid->block, sizeof(grid->block)) != 0) {
 359       memcpy(ice->state.last_block, grid->block, sizeof(grid->block));
 360       ice->state.dirty |= IRIS_DIRTY_CONSTANTS_CS;
 361       ice->state.shaders[MESA_SHADER_COMPUTE].sysvals_need_upload = true;
 362    }
 363
 364    iris_update_grid_size_resource(ice, grid);
 365
 366    iris_binder_reserve_compute(ice);
 367    batch->screen->vtbl.update_surface_base_address(batch, &ice->state.binder);
 368
 369    if (ice->state.compute_predicate) {
 370       batch->screen->vtbl.load_register_mem64(batch, MI_PREDICATE_RESULT,
 371                                     ice->state.compute_predicate, 0);
 372       ice->state.compute_predicate = NULL;
 373    }
 374
 375    iris_handle_always_flush_cache(batch);
 376
 377    batch->screen->vtbl.upload_compute_state(ice, batch, grid);
 378
 379    iris_handle_always_flush_cache(batch);
 380
 381    ice->state.dirty &= ~IRIS_ALL_DIRTY_FOR_COMPUTE;
 382
 383    /* Note: since compute shaders can't access the framebuffer, there's
 384     * no need to call iris_postdraw_update_resolve_tracking.
 385     */
 386 }