src/gallium/drivers/etnaviv/etnaviv_state.c

   1 /*
   2  * Copyright (c) 2012-2015 Etnaviv Project
   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, sub license,
   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
  12  * next paragraph) shall be included in all copies or substantial portions
  13  * of the 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 NON-INFRINGEMENT. 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  * Authors:
  24  *    Wladimir J. van der Laan <laanwj@gmail.com>
  25  *    Christian Gmeiner <christian.gmeiner@gmail.com>
  26  */
  27
  28 #include "etnaviv_state.h"
  29
  30 #include "hw/common.xml.h"
  31
  32 #include "etnaviv_blend.h"
  33 #include "etnaviv_clear_blit.h"
  34 #include "etnaviv_context.h"
  35 #include "etnaviv_format.h"
  36 #include "etnaviv_shader.h"
  37 #include "etnaviv_surface.h"
  38 #include "etnaviv_translate.h"
  39 #include "etnaviv_util.h"
  40 #include "util/u_helpers.h"
  41 #include "util/u_inlines.h"
  42 #include "util/u_math.h"
  43 #include "util/u_memory.h"
  44
  45 static void
  46 etna_set_stencil_ref(struct pipe_context *pctx, const struct pipe_stencil_ref *sr)
  47 {
  48    struct etna_context *ctx = etna_context(pctx);
  49    struct compiled_stencil_ref *cs = &ctx->stencil_ref;
  50
  51    ctx->stencil_ref_s = *sr;
  52
  53    cs->PE_STENCIL_CONFIG = VIVS_PE_STENCIL_CONFIG_REF_FRONT(sr->ref_value[0]);
  54    /* rest of bits weaved in from depth_stencil_alpha */
  55    cs->PE_STENCIL_CONFIG_EXT =
  56       VIVS_PE_STENCIL_CONFIG_EXT_REF_BACK(sr->ref_value[0]);
  57    ctx->dirty |= ETNA_DIRTY_STENCIL_REF;
  58 }
  59
  60 static void
  61 etna_set_clip_state(struct pipe_context *pctx, const struct pipe_clip_state *pcs)
  62 {
  63    /* NOOP */
  64 }
  65
  66 static void
  67 etna_set_sample_mask(struct pipe_context *pctx, unsigned sample_mask)
  68 {
  69    struct etna_context *ctx = etna_context(pctx);
  70
  71    ctx->sample_mask = sample_mask;
  72    ctx->dirty |= ETNA_DIRTY_SAMPLE_MASK;
  73 }
  74
  75 static void
  76 etna_set_constant_buffer(struct pipe_context *pctx,
  77       enum pipe_shader_type shader, uint index,
  78       const struct pipe_constant_buffer *cb)
  79 {
  80    struct etna_context *ctx = etna_context(pctx);
  81
  82    if (unlikely(index > 0)) {
  83       DBG("Unhandled buffer index %i", index);
  84       return;
  85    }
  86
  87
  88    util_copy_constant_buffer(&ctx->constant_buffer[shader], cb);
  89
  90    /* Note that the state tracker can unbind constant buffers by
  91     * passing NULL here. */
  92    if (unlikely(!cb))
  93       return;
  94
  95    /* there is no support for ARB_uniform_buffer_object */
  96    assert(cb->buffer == NULL && cb->user_buffer != NULL);
  97
  98    ctx->dirty |= ETNA_DIRTY_CONSTBUF;
  99 }
 100
 101 static void
 102 etna_update_render_resource(struct pipe_context *pctx, struct pipe_resource *pres)
 103 {
 104    struct etna_resource *res = etna_resource(pres);
 105
 106    if (res->texture && etna_resource_older(res, etna_resource(res->texture))) {
 107       /* The render buffer is older than the texture buffer. Copy it over. */
 108       etna_copy_resource(pctx, pres, res->texture, 0, pres->last_level);
 109       res->seqno = etna_resource(res->texture)->seqno;
 110    }
 111 }
 112
 113 static void
 114 etna_set_framebuffer_state(struct pipe_context *pctx,
 115       const struct pipe_framebuffer_state *sv)
 116 {
 117    struct etna_context *ctx = etna_context(pctx);
 118    struct compiled_framebuffer_state *cs = &ctx->framebuffer;
 119    int nr_samples_color = -1;
 120    int nr_samples_depth = -1;
 121
 122    /* Set up TS as well. Warning: this state is used by both the RS and PE */
 123    uint32_t ts_mem_config = 0;
 124
 125    if (sv->nr_cbufs > 0) { /* at least one color buffer? */
 126       struct etna_surface *cbuf = etna_surface(sv->cbufs[0]);
 127       struct etna_resource *res = etna_resource(cbuf->base.texture);
 128       bool color_supertiled = (res->layout & ETNA_LAYOUT_BIT_SUPER) != 0;
 129
 130       assert(res->layout & ETNA_LAYOUT_BIT_TILE); /* Cannot render to linear surfaces */
 131       etna_update_render_resource(pctx, cbuf->base.texture);
 132
 133       pipe_surface_reference(&cs->cbuf, &cbuf->base);
 134       cs->PE_COLOR_FORMAT =
 135          VIVS_PE_COLOR_FORMAT_FORMAT(translate_rs_format(cbuf->base.format)) |
 136          VIVS_PE_COLOR_FORMAT_COMPONENTS__MASK |
 137          VIVS_PE_COLOR_FORMAT_OVERWRITE |
 138          COND(color_supertiled, VIVS_PE_COLOR_FORMAT_SUPER_TILED);
 139       /* VIVS_PE_COLOR_FORMAT_COMPONENTS() and
 140        * VIVS_PE_COLOR_FORMAT_OVERWRITE comes from blend_state
 141        * but only if we set the bits above. */
 142       /* merged with depth_stencil_alpha */
 143       if ((cbuf->surf.offset & 63) ||
 144           (((cbuf->surf.stride * 4) & 63) && cbuf->surf.height > 4)) {
 145          /* XXX Must make temporary surface here.
 146           * Need the same mechanism on gc2000 when we want to do mipmap
 147           * generation by
 148           * rendering to levels > 1 due to multitiled / tiled conversion. */
 149          BUG("Alignment error, trying to render to offset %08x with tile "
 150              "stride %i",
 151              cbuf->surf.offset, cbuf->surf.stride * 4);
 152       }
 153
 154       if (ctx->specs.pixel_pipes == 1) {
 155          cs->PE_COLOR_ADDR = cbuf->reloc[0];
 156          cs->PE_COLOR_ADDR.flags = ETNA_RELOC_READ | ETNA_RELOC_WRITE;
 157       } else {
 158          /* Rendered textures must always be multi-tiled, or single-buffer mode must be supported */
 159          assert((res->layout & ETNA_LAYOUT_BIT_MULTI) || ctx->specs.single_buffer);
 160          for (int i = 0; i < ctx->specs.pixel_pipes; i++) {
 161             cs->PE_PIPE_COLOR_ADDR[i] = cbuf->reloc[i];
 162             cs->PE_PIPE_COLOR_ADDR[i].flags = ETNA_RELOC_READ | ETNA_RELOC_WRITE;
 163          }
 164       }
 165       cs->PE_COLOR_STRIDE = cbuf->surf.stride;
 166
 167       if (cbuf->surf.ts_size) {
 168          cs->TS_COLOR_CLEAR_VALUE = cbuf->level->clear_value;
 169
 170          cs->TS_COLOR_STATUS_BASE = cbuf->ts_reloc;
 171          cs->TS_COLOR_STATUS_BASE.flags = ETNA_RELOC_READ | ETNA_RELOC_WRITE;
 172
 173          cs->TS_COLOR_SURFACE_BASE = cbuf->reloc[0];
 174          cs->TS_COLOR_SURFACE_BASE.flags = ETNA_RELOC_READ | ETNA_RELOC_WRITE;
 175       }
 176
 177       /* MSAA */
 178       if (cbuf->base.texture->nr_samples > 1)
 179          ts_mem_config |=
 180             VIVS_TS_MEM_CONFIG_MSAA | translate_msaa_format(cbuf->base.format);
 181
 182       nr_samples_color = cbuf->base.texture->nr_samples;
 183    } else {
 184       pipe_surface_reference(&cs->cbuf, NULL);
 185       /* Clearing VIVS_PE_COLOR_FORMAT_COMPONENTS__MASK and
 186        * VIVS_PE_COLOR_FORMAT_OVERWRITE prevents us from overwriting the
 187        * color target */
 188       cs->PE_COLOR_FORMAT = 0;
 189       cs->PE_COLOR_STRIDE = 0;
 190       cs->TS_COLOR_STATUS_BASE.bo = NULL;
 191       cs->TS_COLOR_SURFACE_BASE.bo = NULL;
 192
 193       for (int i = 0; i < ETNA_MAX_PIXELPIPES; i++)
 194          cs->PE_PIPE_COLOR_ADDR[i].bo = NULL;
 195    }
 196
 197    if (sv->zsbuf != NULL) {
 198       struct etna_surface *zsbuf = etna_surface(sv->zsbuf);
 199       struct etna_resource *res = etna_resource(zsbuf->base.texture);
 200
 201       etna_update_render_resource(pctx, zsbuf->base.texture);
 202
 203       pipe_surface_reference(&cs->zsbuf, &zsbuf->base);
 204       assert(res->layout &ETNA_LAYOUT_BIT_TILE); /* Cannot render to linear surfaces */
 205
 206       uint32_t depth_format = translate_depth_format(zsbuf->base.format);
 207       unsigned depth_bits =
 208          depth_format == VIVS_PE_DEPTH_CONFIG_DEPTH_FORMAT_D16 ? 16 : 24;
 209       bool depth_supertiled = (res->layout & ETNA_LAYOUT_BIT_SUPER) != 0;
 210
 211       cs->PE_DEPTH_CONFIG =
 212          depth_format |
 213          COND(depth_supertiled, VIVS_PE_DEPTH_CONFIG_SUPER_TILED) |
 214          VIVS_PE_DEPTH_CONFIG_DEPTH_MODE_Z;
 215       /* VIVS_PE_DEPTH_CONFIG_ONLY_DEPTH */
 216       /* merged with depth_stencil_alpha */
 217
 218       if (ctx->specs.pixel_pipes == 1) {
 219          cs->PE_DEPTH_ADDR = zsbuf->reloc[0];
 220          cs->PE_DEPTH_ADDR.flags = ETNA_RELOC_READ | ETNA_RELOC_WRITE;
 221       } else {
 222          for (int i = 0; i < ctx->specs.pixel_pipes; i++) {
 223             cs->PE_PIPE_DEPTH_ADDR[i] = zsbuf->reloc[i];
 224             cs->PE_PIPE_DEPTH_ADDR[i].flags = ETNA_RELOC_READ | ETNA_RELOC_WRITE;
 225          }
 226       }
 227
 228       cs->PE_DEPTH_STRIDE = zsbuf->surf.stride;
 229       cs->PE_HDEPTH_CONTROL = VIVS_PE_HDEPTH_CONTROL_FORMAT_DISABLED;
 230       cs->PE_DEPTH_NORMALIZE = fui(exp2f(depth_bits) - 1.0f);
 231
 232       if (zsbuf->surf.ts_size) {
 233          cs->TS_DEPTH_CLEAR_VALUE = zsbuf->level->clear_value;
 234
 235          cs->TS_DEPTH_STATUS_BASE = zsbuf->ts_reloc;
 236          cs->TS_DEPTH_STATUS_BASE.flags = ETNA_RELOC_READ | ETNA_RELOC_WRITE;
 237
 238          cs->TS_DEPTH_SURFACE_BASE = zsbuf->reloc[0];
 239          cs->TS_DEPTH_SURFACE_BASE.flags = ETNA_RELOC_READ | ETNA_RELOC_WRITE;
 240       }
 241
 242       ts_mem_config |= COND(depth_bits == 16, VIVS_TS_MEM_CONFIG_DEPTH_16BPP);
 243
 244       /* MSAA */
 245       if (zsbuf->base.texture->nr_samples > 1)
 246          /* XXX VIVS_TS_MEM_CONFIG_DEPTH_COMPRESSION;
 247           * Disable without MSAA for now, as it causes corruption in glquake. */
 248          ts_mem_config |= VIVS_TS_MEM_CONFIG_DEPTH_COMPRESSION;
 249
 250       nr_samples_depth = zsbuf->base.texture->nr_samples;
 251    } else {
 252       pipe_surface_reference(&cs->zsbuf, NULL);
 253       cs->PE_DEPTH_CONFIG = VIVS_PE_DEPTH_CONFIG_DEPTH_MODE_NONE;
 254       cs->PE_DEPTH_ADDR.bo = NULL;
 255       cs->PE_DEPTH_STRIDE = 0;
 256       cs->TS_DEPTH_STATUS_BASE.bo = NULL;
 257       cs->TS_DEPTH_SURFACE_BASE.bo = NULL;
 258
 259       for (int i = 0; i < ETNA_MAX_PIXELPIPES; i++)
 260          cs->PE_PIPE_DEPTH_ADDR[i].bo = NULL;
 261    }
 262
 263    /* MSAA setup */
 264    if (nr_samples_depth != -1 && nr_samples_color != -1 &&
 265        nr_samples_depth != nr_samples_color) {
 266       BUG("Number of samples in color and depth texture must match (%i and %i respectively)",
 267           nr_samples_color, nr_samples_depth);
 268    }
 269
 270    switch (MAX2(nr_samples_depth, nr_samples_color)) {
 271    case 0:
 272    case 1: /* Are 0 and 1 samples allowed? */
 273       cs->GL_MULTI_SAMPLE_CONFIG =
 274          VIVS_GL_MULTI_SAMPLE_CONFIG_MSAA_SAMPLES_NONE;
 275       cs->msaa_mode = false;
 276       break;
 277    case 2:
 278       cs->GL_MULTI_SAMPLE_CONFIG = VIVS_GL_MULTI_SAMPLE_CONFIG_MSAA_SAMPLES_2X;
 279       cs->msaa_mode = true; /* Add input to PS */
 280       cs->RA_MULTISAMPLE_UNK00E04 = 0x0;
 281       cs->RA_MULTISAMPLE_UNK00E10[0] = 0x0000aa22;
 282       cs->RA_CENTROID_TABLE[0] = 0x66aa2288;
 283       cs->RA_CENTROID_TABLE[1] = 0x88558800;
 284       cs->RA_CENTROID_TABLE[2] = 0x88881100;
 285       cs->RA_CENTROID_TABLE[3] = 0x33888800;
 286       break;
 287    case 4:
 288       cs->GL_MULTI_SAMPLE_CONFIG = VIVS_GL_MULTI_SAMPLE_CONFIG_MSAA_SAMPLES_4X;
 289       cs->msaa_mode = true; /* Add input to PS */
 290       cs->RA_MULTISAMPLE_UNK00E04 = 0x0;
 291       cs->RA_MULTISAMPLE_UNK00E10[0] = 0xeaa26e26;
 292       cs->RA_MULTISAMPLE_UNK00E10[1] = 0xe6ae622a;
 293       cs->RA_MULTISAMPLE_UNK00E10[2] = 0xaaa22a22;
 294       cs->RA_CENTROID_TABLE[0] = 0x4a6e2688;
 295       cs->RA_CENTROID_TABLE[1] = 0x888888a2;
 296       cs->RA_CENTROID_TABLE[2] = 0x888888ea;
 297       cs->RA_CENTROID_TABLE[3] = 0x888888c6;
 298       cs->RA_CENTROID_TABLE[4] = 0x46622a88;
 299       cs->RA_CENTROID_TABLE[5] = 0x888888ae;
 300       cs->RA_CENTROID_TABLE[6] = 0x888888e6;
 301       cs->RA_CENTROID_TABLE[7] = 0x888888ca;
 302       cs->RA_CENTROID_TABLE[8] = 0x262a2288;
 303       cs->RA_CENTROID_TABLE[9] = 0x886688a2;
 304       cs->RA_CENTROID_TABLE[10] = 0x888866aa;
 305       cs->RA_CENTROID_TABLE[11] = 0x668888a6;
 306       break;
 307    }
 308
 309    /* Scissor setup */
 310    cs->SE_SCISSOR_LEFT = 0; /* affected by rasterizer and scissor state as well */
 311    cs->SE_SCISSOR_TOP = 0;
 312    cs->SE_SCISSOR_RIGHT = (sv->width << 16) + ETNA_SE_SCISSOR_MARGIN_RIGHT;
 313    cs->SE_SCISSOR_BOTTOM = (sv->height << 16) + ETNA_SE_SCISSOR_MARGIN_BOTTOM;
 314    cs->SE_CLIP_RIGHT = (sv->width << 16) + ETNA_SE_CLIP_MARGIN_RIGHT;
 315    cs->SE_CLIP_BOTTOM = (sv->height << 16) + ETNA_SE_CLIP_MARGIN_BOTTOM;
 316
 317    cs->TS_MEM_CONFIG = ts_mem_config;
 318
 319    /* Single buffer setup. There is only one switch for this, not a separate
 320     * one per color buffer / depth buffer. To keep the logic simple always use
 321     * single buffer when this feature is available.
 322     */
 323    cs->PE_LOGIC_OP = VIVS_PE_LOGIC_OP_SINGLE_BUFFER(ctx->specs.single_buffer ? 2 : 0);
 324
 325    ctx->framebuffer_s = *sv; /* keep copy of original structure */
 326    ctx->dirty |= ETNA_DIRTY_FRAMEBUFFER | ETNA_DIRTY_DERIVE_TS;
 327 }
 328
 329 static void
 330 etna_set_polygon_stipple(struct pipe_context *pctx,
 331       const struct pipe_poly_stipple *stipple)
 332 {
 333    /* NOP */
 334 }
 335
 336 static void
 337 etna_set_scissor_states(struct pipe_context *pctx, unsigned start_slot,
 338       unsigned num_scissors, const struct pipe_scissor_state *ss)
 339 {
 340    struct etna_context *ctx = etna_context(pctx);
 341    struct compiled_scissor_state *cs = &ctx->scissor;
 342    assert(ss->minx <= ss->maxx);
 343    assert(ss->miny <= ss->maxy);
 344
 345    /* note that this state is only used when rasterizer_state->scissor is on */
 346    ctx->scissor_s = *ss;
 347    cs->SE_SCISSOR_LEFT = (ss->minx << 16);
 348    cs->SE_SCISSOR_TOP = (ss->miny << 16);
 349    cs->SE_SCISSOR_RIGHT = (ss->maxx << 16) + ETNA_SE_SCISSOR_MARGIN_RIGHT;
 350    cs->SE_SCISSOR_BOTTOM = (ss->maxy << 16) + ETNA_SE_SCISSOR_MARGIN_BOTTOM;
 351    cs->SE_CLIP_RIGHT = (ss->maxx << 16) + ETNA_SE_CLIP_MARGIN_RIGHT;
 352    cs->SE_CLIP_BOTTOM = (ss->maxy << 16) + ETNA_SE_CLIP_MARGIN_BOTTOM;
 353
 354    ctx->dirty |= ETNA_DIRTY_SCISSOR;
 355 }
 356
 357 static void
 358 etna_set_viewport_states(struct pipe_context *pctx, unsigned start_slot,
 359       unsigned num_scissors, const struct pipe_viewport_state *vs)
 360 {
 361    struct etna_context *ctx = etna_context(pctx);
 362    struct compiled_viewport_state *cs = &ctx->viewport;
 363
 364    ctx->viewport_s = *vs;
 365    /**
 366     * For Vivante GPU, viewport z transformation is 0..1 to 0..1 instead of
 367     * -1..1 to 0..1.
 368     * scaling and translation to 0..1 already happened, so remove that
 369     *
 370     * z' = (z * 2 - 1) * scale + translate
 371     *    = z * (2 * scale) + (translate - scale)
 372     *
 373     * scale' = 2 * scale
 374     * translate' = translate - scale
 375     */
 376
 377    /* must be fixp as v4 state deltas assume it is */
 378    cs->PA_VIEWPORT_SCALE_X = etna_f32_to_fixp16(vs->scale[0]);
 379    cs->PA_VIEWPORT_SCALE_Y = etna_f32_to_fixp16(vs->scale[1]);
 380    cs->PA_VIEWPORT_SCALE_Z = fui(vs->scale[2] * 2.0f);
 381    cs->PA_VIEWPORT_OFFSET_X = etna_f32_to_fixp16(vs->translate[0]);
 382    cs->PA_VIEWPORT_OFFSET_Y = etna_f32_to_fixp16(vs->translate[1]);
 383    cs->PA_VIEWPORT_OFFSET_Z = fui(vs->translate[2] - vs->scale[2]);
 384
 385    /* Compute scissor rectangle (fixp) from viewport.
 386     * Make sure left is always < right and top always < bottom.
 387     */
 388    cs->SE_SCISSOR_LEFT = etna_f32_to_fixp16(MAX2(vs->translate[0] - fabsf(vs->scale[0]), 0.0f));
 389    cs->SE_SCISSOR_TOP = etna_f32_to_fixp16(MAX2(vs->translate[1] - fabsf(vs->scale[1]), 0.0f));
 390    uint32_t right_fixp = etna_f32_to_fixp16(MAX2(vs->translate[0] + fabsf(vs->scale[0]), 0.0f));
 391    uint32_t bottom_fixp = etna_f32_to_fixp16(MAX2(vs->translate[1] + fabsf(vs->scale[1]), 0.0f));
 392    cs->SE_SCISSOR_RIGHT = right_fixp + ETNA_SE_SCISSOR_MARGIN_RIGHT;
 393    cs->SE_SCISSOR_BOTTOM = bottom_fixp + ETNA_SE_SCISSOR_MARGIN_BOTTOM;
 394    cs->SE_CLIP_RIGHT = right_fixp + ETNA_SE_CLIP_MARGIN_RIGHT;
 395    cs->SE_CLIP_BOTTOM = bottom_fixp + ETNA_SE_CLIP_MARGIN_BOTTOM;
 396
 397    cs->PE_DEPTH_NEAR = fui(0.0); /* not affected if depth mode is Z (as in GL) */
 398    cs->PE_DEPTH_FAR = fui(1.0);
 399    ctx->dirty |= ETNA_DIRTY_VIEWPORT;
 400 }
 401
 402 static void
 403 etna_set_vertex_buffers(struct pipe_context *pctx, unsigned start_slot,
 404       unsigned num_buffers, const struct pipe_vertex_buffer *vb)
 405 {
 406    struct etna_context *ctx = etna_context(pctx);
 407    struct etna_vertexbuf_state *so = &ctx->vertex_buffer;
 408
 409    util_set_vertex_buffers_mask(so->vb, &so->enabled_mask, vb, start_slot, num_buffers);
 410    so->count = util_last_bit(so->enabled_mask);
 411
 412    for (unsigned idx = start_slot; idx < start_slot + num_buffers; ++idx) {
 413       struct compiled_set_vertex_buffer *cs = &so->cvb[idx];
 414       struct pipe_vertex_buffer *vbi = &so->vb[idx];
 415
 416       assert(!vbi->is_user_buffer); /* XXX support user_buffer using
 417                                        etna_usermem_map */
 418
 419       if (vbi->buffer.resource) { /* GPU buffer */
 420          cs->FE_VERTEX_STREAM_BASE_ADDR.bo = etna_resource(vbi->buffer.resource)->bo;
 421          cs->FE_VERTEX_STREAM_BASE_ADDR.offset = vbi->buffer_offset;
 422          cs->FE_VERTEX_STREAM_BASE_ADDR.flags = ETNA_RELOC_READ;
 423          cs->FE_VERTEX_STREAM_CONTROL =
 424             FE_VERTEX_STREAM_CONTROL_VERTEX_STRIDE(vbi->stride);
 425       } else {
 426          cs->FE_VERTEX_STREAM_BASE_ADDR.bo = NULL;
 427          cs->FE_VERTEX_STREAM_CONTROL = 0;
 428       }
 429    }
 430
 431    ctx->dirty |= ETNA_DIRTY_VERTEX_BUFFERS;
 432 }
 433
 434 static void
 435 etna_blend_state_bind(struct pipe_context *pctx, void *bs)
 436 {
 437    struct etna_context *ctx = etna_context(pctx);
 438
 439    ctx->blend = bs;
 440    ctx->dirty |= ETNA_DIRTY_BLEND;
 441 }
 442
 443 static void
 444 etna_blend_state_delete(struct pipe_context *pctx, void *bs)
 445 {
 446    FREE(bs);
 447 }
 448
 449 static void
 450 etna_rasterizer_state_bind(struct pipe_context *pctx, void *rs)
 451 {
 452    struct etna_context *ctx = etna_context(pctx);
 453
 454    ctx->rasterizer = rs;
 455    ctx->dirty |= ETNA_DIRTY_RASTERIZER;
 456 }
 457
 458 static void
 459 etna_rasterizer_state_delete(struct pipe_context *pctx, void *rs)
 460 {
 461    FREE(rs);
 462 }
 463
 464 static void
 465 etna_zsa_state_bind(struct pipe_context *pctx, void *zs)
 466 {
 467    struct etna_context *ctx = etna_context(pctx);
 468
 469    ctx->zsa = zs;
 470    ctx->dirty |= ETNA_DIRTY_ZSA;
 471 }
 472
 473 static void
 474 etna_zsa_state_delete(struct pipe_context *pctx, void *zs)
 475 {
 476    FREE(zs);
 477 }
 478
 479 /** Create vertex element states, which define a layout for fetching
 480  * vertices for rendering.
 481  */
 482 static void *
 483 etna_vertex_elements_state_create(struct pipe_context *pctx,
 484       unsigned num_elements, const struct pipe_vertex_element *elements)
 485 {
 486    struct etna_context *ctx = etna_context(pctx);
 487    struct compiled_vertex_elements_state *cs = CALLOC_STRUCT(compiled_vertex_elements_state);
 488
 489    if (!cs)
 490       return NULL;
 491
 492    if (num_elements > ctx->specs.vertex_max_elements) {
 493       BUG("number of elements (%u) exceeds chip maximum (%u)", num_elements,
 494           ctx->specs.vertex_max_elements);
 495       return NULL;
 496    }
 497
 498    /* XXX could minimize number of consecutive stretches here by sorting, and
 499     * permuting the inputs in shader or does Mesa do this already? */
 500
 501    /* Check that vertex element binding is compatible with hardware; thus
 502     * elements[idx].vertex_buffer_index are < stream_count. If not, the binding
 503     * uses more streams than is supported, and u_vbuf should have done some
 504     * reorganization for compatibility. */
 505
 506    /* TODO: does mesa this for us? */
 507    bool incompatible = false;
 508    for (unsigned idx = 0; idx < num_elements; ++idx) {
 509       if (elements[idx].vertex_buffer_index >= ctx->specs.stream_count || elements[idx].instance_divisor > 0)
 510          incompatible = true;
 511    }
 512
 513    cs->num_elements = num_elements;
 514    if (incompatible || num_elements == 0) {
 515       DBG("Error: zero vertex elements, or more vertex buffers used than supported");
 516       FREE(cs);
 517       return NULL;
 518    }
 519
 520    unsigned start_offset = 0; /* start of current consecutive stretch */
 521    bool nonconsecutive = true; /* previous value of nonconsecutive */
 522
 523    for (unsigned idx = 0; idx < num_elements; ++idx) {
 524       unsigned element_size = util_format_get_blocksize(elements[idx].src_format);
 525       unsigned end_offset = elements[idx].src_offset + element_size;
 526       uint32_t format_type, normalize;
 527
 528       if (nonconsecutive)
 529          start_offset = elements[idx].src_offset;
 530
 531       /* maximum vertex size is 256 bytes */
 532       assert(element_size != 0 && end_offset <= 256);
 533
 534       /* check whether next element is consecutive to this one */
 535       nonconsecutive = (idx == (num_elements - 1)) ||
 536                        elements[idx + 1].vertex_buffer_index != elements[idx].vertex_buffer_index ||
 537                        end_offset != elements[idx + 1].src_offset;
 538
 539       format_type = translate_vertex_format_type(elements[idx].src_format);
 540       normalize = translate_vertex_format_normalize(elements[idx].src_format);
 541
 542       assert(format_type != ETNA_NO_MATCH);
 543       assert(normalize != ETNA_NO_MATCH);
 544
 545       cs->FE_VERTEX_ELEMENT_CONFIG[idx] =
 546          COND(nonconsecutive, VIVS_FE_VERTEX_ELEMENT_CONFIG_NONCONSECUTIVE) |
 547          format_type |
 548          VIVS_FE_VERTEX_ELEMENT_CONFIG_NUM(util_format_get_nr_components(elements[idx].src_format)) |
 549          normalize | VIVS_FE_VERTEX_ELEMENT_CONFIG_ENDIAN(ENDIAN_MODE_NO_SWAP) |
 550          VIVS_FE_VERTEX_ELEMENT_CONFIG_STREAM(elements[idx].vertex_buffer_index) |
 551          VIVS_FE_VERTEX_ELEMENT_CONFIG_START(elements[idx].src_offset) |
 552          VIVS_FE_VERTEX_ELEMENT_CONFIG_END(end_offset - start_offset);
 553    }
 554
 555    return cs;
 556 }
 557
 558 static void
 559 etna_vertex_elements_state_delete(struct pipe_context *pctx, void *ve)
 560 {
 561    FREE(ve);
 562 }
 563
 564 static void
 565 etna_vertex_elements_state_bind(struct pipe_context *pctx, void *ve)
 566 {
 567    struct etna_context *ctx = etna_context(pctx);
 568
 569    ctx->vertex_elements = ve;
 570    ctx->dirty |= ETNA_DIRTY_VERTEX_ELEMENTS;
 571 }
 572
 573 static bool
 574 etna_update_ts_config(struct etna_context *ctx)
 575 {
 576    uint32_t new_ts_config = ctx->framebuffer.TS_MEM_CONFIG;
 577
 578    if (ctx->framebuffer_s.nr_cbufs > 0) {
 579       struct etna_surface *c_surf = etna_surface(ctx->framebuffer_s.cbufs[0]);
 580
 581       if(c_surf->level->ts_size && c_surf->level->ts_valid) {
 582          new_ts_config |= VIVS_TS_MEM_CONFIG_COLOR_FAST_CLEAR;
 583       } else {
 584          new_ts_config &= ~VIVS_TS_MEM_CONFIG_COLOR_FAST_CLEAR;
 585       }
 586    }
 587
 588    if (ctx->framebuffer_s.zsbuf) {
 589       struct etna_surface *zs_surf = etna_surface(ctx->framebuffer_s.zsbuf);
 590
 591       if(zs_surf->level->ts_size && zs_surf->level->ts_valid) {
 592          new_ts_config |= VIVS_TS_MEM_CONFIG_DEPTH_FAST_CLEAR;
 593       } else {
 594          new_ts_config &= ~VIVS_TS_MEM_CONFIG_DEPTH_FAST_CLEAR;
 595       }
 596    }
 597
 598    if (new_ts_config != ctx->framebuffer.TS_MEM_CONFIG) {
 599       ctx->framebuffer.TS_MEM_CONFIG = new_ts_config;
 600       ctx->dirty |= ETNA_DIRTY_TS;
 601    }
 602
 603    ctx->dirty &= ~ETNA_DIRTY_DERIVE_TS;
 604
 605    return true;
 606 }
 607
 608 struct etna_state_updater {
 609    bool (*update)(struct etna_context *ctx);
 610    uint32_t dirty;
 611 };
 612
 613 static const struct etna_state_updater etna_state_updates[] = {
 614    {
 615       etna_shader_update_vertex, ETNA_DIRTY_SHADER | ETNA_DIRTY_VERTEX_ELEMENTS,
 616    },
 617    {
 618       etna_shader_link, ETNA_DIRTY_SHADER,
 619    },
 620    {
 621       etna_update_blend, ETNA_DIRTY_BLEND | ETNA_DIRTY_FRAMEBUFFER
 622    },
 623    {
 624       etna_update_blend_color, ETNA_DIRTY_BLEND_COLOR | ETNA_DIRTY_FRAMEBUFFER,
 625    },
 626    {
 627       etna_update_ts_config, ETNA_DIRTY_DERIVE_TS,
 628    }
 629 };
 630
 631 bool
 632 etna_state_update(struct etna_context *ctx)
 633 {
 634    for (unsigned int i = 0; i < ARRAY_SIZE(etna_state_updates); i++)
 635       if (ctx->dirty & etna_state_updates[i].dirty)
 636          if (!etna_state_updates[i].update(ctx))
 637             return false;
 638
 639    return true;
 640 }
 641
 642 void
 643 etna_state_init(struct pipe_context *pctx)
 644 {
 645    pctx->set_blend_color = etna_set_blend_color;
 646    pctx->set_stencil_ref = etna_set_stencil_ref;
 647    pctx->set_clip_state = etna_set_clip_state;
 648    pctx->set_sample_mask = etna_set_sample_mask;
 649    pctx->set_constant_buffer = etna_set_constant_buffer;
 650    pctx->set_framebuffer_state = etna_set_framebuffer_state;
 651    pctx->set_polygon_stipple = etna_set_polygon_stipple;
 652    pctx->set_scissor_states = etna_set_scissor_states;
 653    pctx->set_viewport_states = etna_set_viewport_states;
 654
 655    pctx->set_vertex_buffers = etna_set_vertex_buffers;
 656
 657    pctx->bind_blend_state = etna_blend_state_bind;
 658    pctx->delete_blend_state = etna_blend_state_delete;
 659
 660    pctx->bind_rasterizer_state = etna_rasterizer_state_bind;
 661    pctx->delete_rasterizer_state = etna_rasterizer_state_delete;
 662
 663    pctx->bind_depth_stencil_alpha_state = etna_zsa_state_bind;
 664    pctx->delete_depth_stencil_alpha_state = etna_zsa_state_delete;
 665
 666    pctx->create_vertex_elements_state = etna_vertex_elements_state_create;
 667    pctx->delete_vertex_elements_state = etna_vertex_elements_state_delete;
 668    pctx->bind_vertex_elements_state = etna_vertex_elements_state_bind;
 669 }