src/gallium/drivers/vc4/vc4_state.c

   1 /*
   2  * Copyright © 2014 Broadcom
   3  * Copyright (C) 2012 Rob Clark <robclark@freedesktop.org>
   4  *
   5  * Permission is hereby granted, free of charge, to any person obtaining a
   6  * copy of this software and associated documentation files (the "Software"),
   7  * to deal in the Software without restriction, including without limitation
   8  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   9  * and/or sell copies of the Software, and to permit persons to whom the
  10  * Software is furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice (including the next
  13  * paragraph) shall be included in all copies or substantial portions of the
  14  * Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  19  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  21  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  22  * IN THE SOFTWARE.
  23  */
  24
  25 #include "pipe/p_state.h"
  26 #include "util/u_inlines.h"
  27 #include "util/u_math.h"
  28 #include "util/u_memory.h"
  29 #include "util/u_helpers.h"
  30
  31 #include "vc4_context.h"
  32
  33 static void *
  34 vc4_generic_cso_state_create(const void *src, uint32_t size)
  35 {
  36         void *dst = calloc(1, size);
  37         if (!dst)
  38                 return NULL;
  39         memcpy(dst, src, size);
  40         return dst;
  41 }
  42
  43 static void
  44 vc4_generic_cso_state_delete(struct pipe_context *pctx, void *hwcso)
  45 {
  46         free(hwcso);
  47 }
  48
  49 static void
  50 vc4_set_blend_color(struct pipe_context *pctx,
  51                     const struct pipe_blend_color *blend_color)
  52 {
  53         struct vc4_context *vc4 = vc4_context(pctx);
  54         vc4->blend_color.f = *blend_color;
  55         for (int i = 0; i < 4; i++)
  56                 vc4->blend_color.ub[i] = float_to_ubyte(blend_color->color[i]);
  57         vc4->dirty |= VC4_DIRTY_BLEND_COLOR;
  58 }
  59
  60 static void
  61 vc4_set_stencil_ref(struct pipe_context *pctx,
  62                     const struct pipe_stencil_ref *stencil_ref)
  63 {
  64         struct vc4_context *vc4 = vc4_context(pctx);
  65         vc4->stencil_ref =* stencil_ref;
  66         vc4->dirty |= VC4_DIRTY_STENCIL_REF;
  67 }
  68
  69 static void
  70 vc4_set_clip_state(struct pipe_context *pctx,
  71                    const struct pipe_clip_state *clip)
  72 {
  73         struct vc4_context *vc4 = vc4_context(pctx);
  74         vc4->clip = *clip;
  75         vc4->dirty |= VC4_DIRTY_CLIP;
  76 }
  77
  78 static void
  79 vc4_set_sample_mask(struct pipe_context *pctx, unsigned sample_mask)
  80 {
  81         struct vc4_context *vc4 = vc4_context(pctx);
  82         vc4->sample_mask = sample_mask & ((1 << VC4_MAX_SAMPLES) - 1);
  83         vc4->dirty |= VC4_DIRTY_SAMPLE_MASK;
  84 }
  85
  86 static uint16_t
  87 float_to_187_half(float f)
  88 {
  89         return fui(f) >> 16;
  90 }
  91
  92 static void *
  93 vc4_create_rasterizer_state(struct pipe_context *pctx,
  94                             const struct pipe_rasterizer_state *cso)
  95 {
  96         struct vc4_rasterizer_state *so;
  97
  98         so = CALLOC_STRUCT(vc4_rasterizer_state);
  99         if (!so)
 100                 return NULL;
 101
 102         so->base = *cso;
 103
 104         if (!(cso->cull_face & PIPE_FACE_FRONT))
 105                 so->config_bits[0] |= VC4_CONFIG_BITS_ENABLE_PRIM_FRONT;
 106         if (!(cso->cull_face & PIPE_FACE_BACK))
 107                 so->config_bits[0] |= VC4_CONFIG_BITS_ENABLE_PRIM_BACK;
 108
 109         /* Workaround: HW-2726 PTB does not handle zero-size points (BCM2835,
 110          * BCM21553).
 111          */
 112         so->point_size = MAX2(cso->point_size, .125f);
 113
 114         if (cso->front_ccw)
 115                 so->config_bits[0] |= VC4_CONFIG_BITS_CW_PRIMITIVES;
 116
 117         if (cso->offset_tri) {
 118                 so->config_bits[0] |= VC4_CONFIG_BITS_ENABLE_DEPTH_OFFSET;
 119
 120                 so->offset_units = float_to_187_half(cso->offset_units);
 121                 so->offset_factor = float_to_187_half(cso->offset_scale);
 122         }
 123
 124         if (cso->multisample)
 125                 so->config_bits[0] |= VC4_CONFIG_BITS_RASTERIZER_OVERSAMPLE_4X;
 126
 127         return so;
 128 }
 129
 130 /* Blend state is baked into shaders. */
 131 static void *
 132 vc4_create_blend_state(struct pipe_context *pctx,
 133                        const struct pipe_blend_state *cso)
 134 {
 135         return vc4_generic_cso_state_create(cso, sizeof(*cso));
 136 }
 137
 138 /**
 139  * The TLB_STENCIL_SETUP data has a little bitfield for common writemask
 140  * values, so you don't have to do a separate writemask setup.
 141  */
 142 static uint8_t
 143 tlb_stencil_setup_writemask(uint8_t mask)
 144 {
 145         switch (mask) {
 146         case 0x1: return 0;
 147         case 0x3: return 1;
 148         case 0xf: return 2;
 149         case 0xff: return 3;
 150         default: return 0xff;
 151         }
 152 }
 153
 154 static uint32_t
 155 tlb_stencil_setup_bits(const struct pipe_stencil_state *state,
 156                        uint8_t writemask_bits)
 157 {
 158         static const uint8_t op_map[] = {
 159                 [PIPE_STENCIL_OP_ZERO] = 0,
 160                 [PIPE_STENCIL_OP_KEEP] = 1,
 161                 [PIPE_STENCIL_OP_REPLACE] = 2,
 162                 [PIPE_STENCIL_OP_INCR] = 3,
 163                 [PIPE_STENCIL_OP_DECR] = 4,
 164                 [PIPE_STENCIL_OP_INVERT] = 5,
 165                 [PIPE_STENCIL_OP_INCR_WRAP] = 6,
 166                 [PIPE_STENCIL_OP_DECR_WRAP] = 7,
 167         };
 168         uint32_t bits = 0;
 169
 170         if (writemask_bits != 0xff)
 171                 bits |= writemask_bits << 28;
 172         bits |= op_map[state->zfail_op] << 25;
 173         bits |= op_map[state->zpass_op] << 22;
 174         bits |= op_map[state->fail_op] << 19;
 175         bits |= state->func << 16;
 176         /* Ref is filled in at uniform upload time */
 177         bits |= state->valuemask << 0;
 178
 179         return bits;
 180 }
 181
 182 static void *
 183 vc4_create_depth_stencil_alpha_state(struct pipe_context *pctx,
 184                                      const struct pipe_depth_stencil_alpha_state *cso)
 185 {
 186         struct vc4_depth_stencil_alpha_state *so;
 187
 188         so = CALLOC_STRUCT(vc4_depth_stencil_alpha_state);
 189         if (!so)
 190                 return NULL;
 191
 192         so->base = *cso;
 193
 194         /* We always keep the early Z state correct, since a later state using
 195          * early Z may want it.
 196          */
 197         so->config_bits[2] |= VC4_CONFIG_BITS_EARLY_Z_UPDATE;
 198
 199         if (cso->depth.enabled) {
 200                 if (cso->depth.writemask) {
 201                         so->config_bits[1] |= VC4_CONFIG_BITS_Z_UPDATE;
 202                 }
 203                 so->config_bits[1] |= (cso->depth.func <<
 204                                        VC4_CONFIG_BITS_DEPTH_FUNC_SHIFT);
 205
 206                 /* We only handle early Z in the < direction because otherwise
 207                  * we'd have to runtime guess which direction to set in the
 208                  * render config.
 209                  */
 210                 if ((cso->depth.func == PIPE_FUNC_LESS ||
 211                      cso->depth.func == PIPE_FUNC_LEQUAL) &&
 212                     (!cso->stencil[0].enabled ||
 213                      (cso->stencil[0].zfail_op == PIPE_STENCIL_OP_KEEP &&
 214                       (!cso->stencil[1].enabled ||
 215                        cso->stencil[1].zfail_op == PIPE_STENCIL_OP_KEEP)))) {
 216                         so->config_bits[2] |= VC4_CONFIG_BITS_EARLY_Z;
 217                 }
 218         } else {
 219                 so->config_bits[1] |= (PIPE_FUNC_ALWAYS <<
 220                                        VC4_CONFIG_BITS_DEPTH_FUNC_SHIFT);
 221         }
 222
 223         if (cso->stencil[0].enabled) {
 224                 const struct pipe_stencil_state *front = &cso->stencil[0];
 225                 const struct pipe_stencil_state *back = &cso->stencil[1];
 226
 227                 uint8_t front_writemask_bits =
 228                         tlb_stencil_setup_writemask(front->writemask);
 229                 uint8_t back_writemask = front->writemask;
 230                 uint8_t back_writemask_bits = front_writemask_bits;
 231
 232                 so->stencil_uniforms[0] =
 233                         tlb_stencil_setup_bits(front, front_writemask_bits);
 234                 if (back->enabled) {
 235                         back_writemask = back->writemask;
 236                         back_writemask_bits =
 237                                 tlb_stencil_setup_writemask(back->writemask);
 238
 239                         so->stencil_uniforms[0] |= (1 << 30);
 240                         so->stencil_uniforms[1] =
 241                                 tlb_stencil_setup_bits(back, back_writemask_bits);
 242                         so->stencil_uniforms[1] |= (2 << 30);
 243                 } else {
 244                         so->stencil_uniforms[0] |= (3 << 30);
 245                 }
 246
 247                 if (front_writemask_bits == 0xff ||
 248                     back_writemask_bits == 0xff) {
 249                         so->stencil_uniforms[2] = (front->writemask |
 250                                                    (back_writemask << 8));
 251                 }
 252         }
 253
 254         return so;
 255 }
 256
 257 static void
 258 vc4_set_polygon_stipple(struct pipe_context *pctx,
 259                         const struct pipe_poly_stipple *stipple)
 260 {
 261         struct vc4_context *vc4 = vc4_context(pctx);
 262         vc4->stipple = *stipple;
 263         vc4->dirty |= VC4_DIRTY_STIPPLE;
 264 }
 265
 266 static void
 267 vc4_set_scissor_states(struct pipe_context *pctx,
 268                        unsigned start_slot,
 269                        unsigned num_scissors,
 270                        const struct pipe_scissor_state *scissor)
 271 {
 272         struct vc4_context *vc4 = vc4_context(pctx);
 273
 274         vc4->scissor = *scissor;
 275         vc4->dirty |= VC4_DIRTY_SCISSOR;
 276 }
 277
 278 static void
 279 vc4_set_viewport_states(struct pipe_context *pctx,
 280                         unsigned start_slot,
 281                         unsigned num_viewports,
 282                         const struct pipe_viewport_state *viewport)
 283 {
 284         struct vc4_context *vc4 = vc4_context(pctx);
 285         vc4->viewport = *viewport;
 286         vc4->dirty |= VC4_DIRTY_VIEWPORT;
 287 }
 288
 289 static void
 290 vc4_set_vertex_buffers(struct pipe_context *pctx,
 291                        unsigned start_slot, unsigned count,
 292                        const struct pipe_vertex_buffer *vb)
 293 {
 294         struct vc4_context *vc4 = vc4_context(pctx);
 295         struct vc4_vertexbuf_stateobj *so = &vc4->vertexbuf;
 296
 297         util_set_vertex_buffers_mask(so->vb, &so->enabled_mask, vb,
 298                                      start_slot, count);
 299         so->count = util_last_bit(so->enabled_mask);
 300
 301         vc4->dirty |= VC4_DIRTY_VTXBUF;
 302 }
 303
 304 static void
 305 vc4_set_index_buffer(struct pipe_context *pctx,
 306                      const struct pipe_index_buffer *ib)
 307 {
 308         struct vc4_context *vc4 = vc4_context(pctx);
 309
 310         if (ib) {
 311                 pipe_resource_reference(&vc4->indexbuf.buffer, ib->buffer);
 312                 vc4->indexbuf.index_size = ib->index_size;
 313                 vc4->indexbuf.offset = ib->offset;
 314                 vc4->indexbuf.user_buffer = ib->user_buffer;
 315         } else {
 316                 pipe_resource_reference(&vc4->indexbuf.buffer, NULL);
 317         }
 318
 319         vc4->dirty |= VC4_DIRTY_INDEXBUF;
 320 }
 321
 322 static void
 323 vc4_blend_state_bind(struct pipe_context *pctx, void *hwcso)
 324 {
 325         struct vc4_context *vc4 = vc4_context(pctx);
 326         vc4->blend = hwcso;
 327         vc4->dirty |= VC4_DIRTY_BLEND;
 328 }
 329
 330 static void
 331 vc4_rasterizer_state_bind(struct pipe_context *pctx, void *hwcso)
 332 {
 333         struct vc4_context *vc4 = vc4_context(pctx);
 334         struct vc4_rasterizer_state *rast = hwcso;
 335
 336         if (vc4->rasterizer && rast &&
 337             vc4->rasterizer->base.flatshade != rast->base.flatshade) {
 338                 vc4->dirty |= VC4_DIRTY_FLAT_SHADE_FLAGS;
 339         }
 340
 341         vc4->rasterizer = hwcso;
 342         vc4->dirty |= VC4_DIRTY_RASTERIZER;
 343 }
 344
 345 static void
 346 vc4_zsa_state_bind(struct pipe_context *pctx, void *hwcso)
 347 {
 348         struct vc4_context *vc4 = vc4_context(pctx);
 349         vc4->zsa = hwcso;
 350         vc4->dirty |= VC4_DIRTY_ZSA;
 351 }
 352
 353 static void *
 354 vc4_vertex_state_create(struct pipe_context *pctx, unsigned num_elements,
 355                         const struct pipe_vertex_element *elements)
 356 {
 357         struct vc4_vertex_stateobj *so = CALLOC_STRUCT(vc4_vertex_stateobj);
 358
 359         if (!so)
 360                 return NULL;
 361
 362         memcpy(so->pipe, elements, sizeof(*elements) * num_elements);
 363         so->num_elements = num_elements;
 364
 365         return so;
 366 }
 367
 368 static void
 369 vc4_vertex_state_bind(struct pipe_context *pctx, void *hwcso)
 370 {
 371         struct vc4_context *vc4 = vc4_context(pctx);
 372         vc4->vtx = hwcso;
 373         vc4->dirty |= VC4_DIRTY_VTXSTATE;
 374 }
 375
 376 static void
 377 vc4_set_constant_buffer(struct pipe_context *pctx, uint shader, uint index,
 378                         const struct pipe_constant_buffer *cb)
 379 {
 380         struct vc4_context *vc4 = vc4_context(pctx);
 381         struct vc4_constbuf_stateobj *so = &vc4->constbuf[shader];
 382
 383         assert(index == 0);
 384
 385         /* Note that the state tracker can unbind constant buffers by
 386          * passing NULL here.
 387          */
 388         if (unlikely(!cb)) {
 389                 so->enabled_mask &= ~(1 << index);
 390                 so->dirty_mask &= ~(1 << index);
 391                 return;
 392         }
 393
 394         assert(!cb->buffer);
 395         so->cb[index].buffer_offset = cb->buffer_offset;
 396         so->cb[index].buffer_size   = cb->buffer_size;
 397         so->cb[index].user_buffer   = cb->user_buffer;
 398
 399         so->enabled_mask |= 1 << index;
 400         so->dirty_mask |= 1 << index;
 401         vc4->dirty |= VC4_DIRTY_CONSTBUF;
 402 }
 403
 404 static void
 405 vc4_set_framebuffer_state(struct pipe_context *pctx,
 406                           const struct pipe_framebuffer_state *framebuffer)
 407 {
 408         struct vc4_context *vc4 = vc4_context(pctx);
 409         struct pipe_framebuffer_state *cso = &vc4->framebuffer;
 410         unsigned i;
 411
 412         vc4_flush(pctx);
 413
 414         for (i = 0; i < framebuffer->nr_cbufs; i++)
 415                 pipe_surface_reference(&cso->cbufs[i], framebuffer->cbufs[i]);
 416         for (; i < vc4->framebuffer.nr_cbufs; i++)
 417                 pipe_surface_reference(&cso->cbufs[i], NULL);
 418
 419         cso->nr_cbufs = framebuffer->nr_cbufs;
 420
 421         pipe_surface_reference(&cso->zsbuf, framebuffer->zsbuf);
 422
 423         cso->width = framebuffer->width;
 424         cso->height = framebuffer->height;
 425
 426         /* If we're binding to uninitialized buffers, no need to load their
 427          * contents before drawing..
 428          */
 429         if (cso->cbufs[0]) {
 430                 struct vc4_resource *rsc =
 431                         vc4_resource(cso->cbufs[0]->texture);
 432                 if (!rsc->writes)
 433                         vc4->cleared |= PIPE_CLEAR_COLOR0;
 434         }
 435
 436         if (cso->zsbuf) {
 437                 struct vc4_resource *rsc =
 438                         vc4_resource(cso->zsbuf->texture);
 439                 if (!rsc->writes)
 440                         vc4->cleared |= PIPE_CLEAR_DEPTH | PIPE_CLEAR_STENCIL;
 441         }
 442
 443         /* Nonzero texture mipmap levels are laid out as if they were in
 444          * power-of-two-sized spaces.  The renderbuffer config infers its
 445          * stride from the width parameter, so we need to configure our
 446          * framebuffer.  Note that if the z/color buffers were mismatched
 447          * sizes, we wouldn't be able to do this.
 448          */
 449         if (cso->cbufs[0] && cso->cbufs[0]->u.tex.level) {
 450                 struct vc4_resource *rsc =
 451                         vc4_resource(cso->cbufs[0]->texture);
 452                 cso->width =
 453                         (rsc->slices[cso->cbufs[0]->u.tex.level].stride /
 454                          rsc->cpp);
 455         } else if (cso->zsbuf && cso->zsbuf->u.tex.level){
 456                 struct vc4_resource *rsc =
 457                         vc4_resource(cso->zsbuf->texture);
 458                 cso->width =
 459                         (rsc->slices[cso->zsbuf->u.tex.level].stride /
 460                          rsc->cpp);
 461         }
 462
 463         vc4->msaa = false;
 464         if (cso->cbufs[0])
 465                 vc4->msaa = cso->cbufs[0]->texture->nr_samples > 1;
 466         else if (cso->zsbuf)
 467                 vc4->msaa = cso->zsbuf->texture->nr_samples > 1;
 468
 469         if (vc4->msaa) {
 470                 vc4->tile_width = 32;
 471                 vc4->tile_height = 32;
 472         } else {
 473                 vc4->tile_width = 64;
 474                 vc4->tile_height = 64;
 475         }
 476         vc4->draw_tiles_x = DIV_ROUND_UP(cso->width, vc4->tile_width);
 477         vc4->draw_tiles_y = DIV_ROUND_UP(cso->height, vc4->tile_height);
 478
 479         vc4->dirty |= VC4_DIRTY_FRAMEBUFFER;
 480 }
 481
 482 static struct vc4_texture_stateobj *
 483 vc4_get_stage_tex(struct vc4_context *vc4, unsigned shader)
 484 {
 485         switch (shader) {
 486         case PIPE_SHADER_FRAGMENT:
 487                 vc4->dirty |= VC4_DIRTY_FRAGTEX;
 488                 return &vc4->fragtex;
 489                 break;
 490         case PIPE_SHADER_VERTEX:
 491                 vc4->dirty |= VC4_DIRTY_VERTTEX;
 492                 return &vc4->verttex;
 493                 break;
 494         default:
 495                 fprintf(stderr, "Unknown shader target %d\n", shader);
 496                 abort();
 497         }
 498 }
 499
 500 static uint32_t translate_wrap(uint32_t p_wrap, bool using_nearest)
 501 {
 502         switch (p_wrap) {
 503         case PIPE_TEX_WRAP_REPEAT:
 504                 return 0;
 505         case PIPE_TEX_WRAP_CLAMP_TO_EDGE:
 506                 return 1;
 507         case PIPE_TEX_WRAP_MIRROR_REPEAT:
 508                 return 2;
 509         case PIPE_TEX_WRAP_CLAMP_TO_BORDER:
 510                 return 3;
 511         case PIPE_TEX_WRAP_CLAMP:
 512                 return (using_nearest ? 1 : 3);
 513         default:
 514                 fprintf(stderr, "Unknown wrap mode %d\n", p_wrap);
 515                 assert(!"not reached");
 516                 return 0;
 517         }
 518 }
 519
 520 static void *
 521 vc4_create_sampler_state(struct pipe_context *pctx,
 522                          const struct pipe_sampler_state *cso)
 523 {
 524         static const uint8_t minfilter_map[6] = {
 525                 VC4_TEX_P1_MINFILT_NEAR_MIP_NEAR,
 526                 VC4_TEX_P1_MINFILT_LIN_MIP_NEAR,
 527                 VC4_TEX_P1_MINFILT_NEAR_MIP_LIN,
 528                 VC4_TEX_P1_MINFILT_LIN_MIP_LIN,
 529                 VC4_TEX_P1_MINFILT_NEAREST,
 530                 VC4_TEX_P1_MINFILT_LINEAR,
 531         };
 532         static const uint32_t magfilter_map[] = {
 533                 [PIPE_TEX_FILTER_NEAREST] = VC4_TEX_P1_MAGFILT_NEAREST,
 534                 [PIPE_TEX_FILTER_LINEAR] = VC4_TEX_P1_MAGFILT_LINEAR,
 535         };
 536         bool either_nearest =
 537                 (cso->mag_img_filter == PIPE_TEX_MIPFILTER_NEAREST ||
 538                  cso->min_img_filter == PIPE_TEX_MIPFILTER_NEAREST);
 539         struct vc4_sampler_state *so = CALLOC_STRUCT(vc4_sampler_state);
 540
 541         if (!so)
 542                 return NULL;
 543
 544         memcpy(so, cso, sizeof(*cso));
 545
 546         so->texture_p1 =
 547                 (VC4_SET_FIELD(magfilter_map[cso->mag_img_filter],
 548                                VC4_TEX_P1_MAGFILT) |
 549                  VC4_SET_FIELD(minfilter_map[cso->min_mip_filter * 2 +
 550                                              cso->min_img_filter],
 551                                VC4_TEX_P1_MINFILT) |
 552                  VC4_SET_FIELD(translate_wrap(cso->wrap_s, either_nearest),
 553                                VC4_TEX_P1_WRAP_S) |
 554                  VC4_SET_FIELD(translate_wrap(cso->wrap_t, either_nearest),
 555                                VC4_TEX_P1_WRAP_T));
 556
 557         return so;
 558 }
 559
 560 static void
 561 vc4_sampler_states_bind(struct pipe_context *pctx,
 562                         unsigned shader, unsigned start,
 563                         unsigned nr, void **hwcso)
 564 {
 565         struct vc4_context *vc4 = vc4_context(pctx);
 566         struct vc4_texture_stateobj *stage_tex = vc4_get_stage_tex(vc4, shader);
 567
 568         assert(start == 0);
 569         unsigned i;
 570         unsigned new_nr = 0;
 571
 572         for (i = 0; i < nr; i++) {
 573                 if (hwcso[i])
 574                         new_nr = i + 1;
 575                 stage_tex->samplers[i] = hwcso[i];
 576         }
 577
 578         for (; i < stage_tex->num_samplers; i++) {
 579                 stage_tex->samplers[i] = NULL;
 580         }
 581
 582         stage_tex->num_samplers = new_nr;
 583 }
 584
 585 static struct pipe_sampler_view *
 586 vc4_create_sampler_view(struct pipe_context *pctx, struct pipe_resource *prsc,
 587                         const struct pipe_sampler_view *cso)
 588 {
 589         struct vc4_sampler_view *so = malloc(sizeof(*so));
 590         struct vc4_resource *rsc = vc4_resource(prsc);
 591
 592         if (!so)
 593                 return NULL;
 594
 595         so->base = *cso;
 596
 597         pipe_reference(NULL, &prsc->reference);
 598
 599         /* There is no hardware level clamping, and the start address of a
 600          * texture may be misaligned, so in that case we have to copy to a
 601          * temporary.
 602          *
 603          * Also, Raspberry Pi doesn't support sampling from raster textures,
 604          * so we also have to copy to a temporary then.
 605          */
 606         if ((cso->u.tex.first_level &&
 607              (cso->u.tex.first_level != cso->u.tex.last_level)) ||
 608             rsc->vc4_format == VC4_TEXTURE_TYPE_RGBA32R) {
 609                 struct vc4_resource *shadow_parent = vc4_resource(prsc);
 610                 struct pipe_resource tmpl = shadow_parent->base.b;
 611                 struct vc4_resource *clone;
 612
 613                 tmpl.bind = PIPE_BIND_SAMPLER_VIEW | PIPE_BIND_RENDER_TARGET;
 614                 tmpl.width0 = u_minify(tmpl.width0, cso->u.tex.first_level);
 615                 tmpl.height0 = u_minify(tmpl.height0, cso->u.tex.first_level);
 616                 tmpl.last_level = cso->u.tex.last_level - cso->u.tex.first_level;
 617
 618                 prsc = vc4_resource_create(pctx->screen, &tmpl);
 619                 if (!prsc) {
 620                         free(so);
 621                         return NULL;
 622                 }
 623                 rsc = vc4_resource(prsc);
 624                 clone = vc4_resource(prsc);
 625                 clone->shadow_parent = &shadow_parent->base.b;
 626                 /* Flag it as needing update of the contents from the parent. */
 627                 clone->writes = shadow_parent->writes - 1;
 628
 629                 assert(clone->vc4_format != VC4_TEXTURE_TYPE_RGBA32R);
 630         } else if (cso->u.tex.first_level) {
 631                 so->force_first_level = true;
 632         }
 633         so->base.texture = prsc;
 634         so->base.reference.count = 1;
 635         so->base.context = pctx;
 636
 637         so->texture_p0 =
 638                 (VC4_SET_FIELD(rsc->slices[0].offset >> 12, VC4_TEX_P0_OFFSET) |
 639                  VC4_SET_FIELD(rsc->vc4_format & 15, VC4_TEX_P0_TYPE) |
 640                  VC4_SET_FIELD(so->force_first_level ?
 641                                cso->u.tex.last_level :
 642                                cso->u.tex.last_level -
 643                                cso->u.tex.first_level, VC4_TEX_P0_MIPLVLS) |
 644                  VC4_SET_FIELD(cso->target == PIPE_TEXTURE_CUBE,
 645                                VC4_TEX_P0_CMMODE));
 646         so->texture_p1 =
 647                 (VC4_SET_FIELD(rsc->vc4_format >> 4, VC4_TEX_P1_TYPE4) |
 648                  VC4_SET_FIELD(prsc->height0 & 2047, VC4_TEX_P1_HEIGHT) |
 649                  VC4_SET_FIELD(prsc->width0 & 2047, VC4_TEX_P1_WIDTH));
 650
 651         return &so->base;
 652 }
 653
 654 static void
 655 vc4_sampler_view_destroy(struct pipe_context *pctx,
 656                          struct pipe_sampler_view *view)
 657 {
 658         pipe_resource_reference(&view->texture, NULL);
 659         free(view);
 660 }
 661
 662 static void
 663 vc4_set_sampler_views(struct pipe_context *pctx, unsigned shader,
 664                       unsigned start, unsigned nr,
 665                       struct pipe_sampler_view **views)
 666 {
 667         struct vc4_context *vc4 = vc4_context(pctx);
 668         struct vc4_texture_stateobj *stage_tex = vc4_get_stage_tex(vc4, shader);
 669         unsigned i;
 670         unsigned new_nr = 0;
 671
 672         assert(start == 0);
 673
 674         for (i = 0; i < nr; i++) {
 675                 if (views[i])
 676                         new_nr = i + 1;
 677                 pipe_sampler_view_reference(&stage_tex->textures[i], views[i]);
 678         }
 679
 680         for (; i < stage_tex->num_textures; i++) {
 681                 pipe_sampler_view_reference(&stage_tex->textures[i], NULL);
 682         }
 683
 684         stage_tex->num_textures = new_nr;
 685 }
 686
 687 void
 688 vc4_state_init(struct pipe_context *pctx)
 689 {
 690         pctx->set_blend_color = vc4_set_blend_color;
 691         pctx->set_stencil_ref = vc4_set_stencil_ref;
 692         pctx->set_clip_state = vc4_set_clip_state;
 693         pctx->set_sample_mask = vc4_set_sample_mask;
 694         pctx->set_constant_buffer = vc4_set_constant_buffer;
 695         pctx->set_framebuffer_state = vc4_set_framebuffer_state;
 696         pctx->set_polygon_stipple = vc4_set_polygon_stipple;
 697         pctx->set_scissor_states = vc4_set_scissor_states;
 698         pctx->set_viewport_states = vc4_set_viewport_states;
 699
 700         pctx->set_vertex_buffers = vc4_set_vertex_buffers;
 701         pctx->set_index_buffer = vc4_set_index_buffer;
 702
 703         pctx->create_blend_state = vc4_create_blend_state;
 704         pctx->bind_blend_state = vc4_blend_state_bind;
 705         pctx->delete_blend_state = vc4_generic_cso_state_delete;
 706
 707         pctx->create_rasterizer_state = vc4_create_rasterizer_state;
 708         pctx->bind_rasterizer_state = vc4_rasterizer_state_bind;
 709         pctx->delete_rasterizer_state = vc4_generic_cso_state_delete;
 710
 711         pctx->create_depth_stencil_alpha_state = vc4_create_depth_stencil_alpha_state;
 712         pctx->bind_depth_stencil_alpha_state = vc4_zsa_state_bind;
 713         pctx->delete_depth_stencil_alpha_state = vc4_generic_cso_state_delete;
 714
 715         pctx->create_vertex_elements_state = vc4_vertex_state_create;
 716         pctx->delete_vertex_elements_state = vc4_generic_cso_state_delete;
 717         pctx->bind_vertex_elements_state = vc4_vertex_state_bind;
 718
 719         pctx->create_sampler_state = vc4_create_sampler_state;
 720         pctx->delete_sampler_state = vc4_generic_cso_state_delete;
 721         pctx->bind_sampler_states = vc4_sampler_states_bind;
 722
 723         pctx->create_sampler_view = vc4_create_sampler_view;
 724         pctx->sampler_view_destroy = vc4_sampler_view_destroy;
 725         pctx->set_sampler_views = vc4_set_sampler_views;
 726 }