src/gallium/drivers/etnaviv/etnaviv_clear_blit.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  */
  26
  27 #include "etnaviv_clear_blit.h"
  28
  29 #include "hw/common.xml.h"
  30
  31 #include "etnaviv_context.h"
  32 #include "etnaviv_emit.h"
  33 #include "etnaviv_emit.h"
  34 #include "etnaviv_format.h"
  35 #include "etnaviv_resource.h"
  36 #include "etnaviv_surface.h"
  37 #include "etnaviv_translate.h"
  38
  39 #include "pipe/p_defines.h"
  40 #include "pipe/p_state.h"
  41 #include "util/u_blitter.h"
  42 #include "util/u_inlines.h"
  43 #include "util/u_memory.h"
  44 #include "util/u_surface.h"
  45
  46 /* Save current state for blitter operation */
  47 static void
  48 etna_blit_save_state(struct etna_context *ctx)
  49 {
  50    util_blitter_save_vertex_buffer_slot(ctx->blitter, ctx->vertex_buffer.vb);
  51    util_blitter_save_vertex_elements(ctx->blitter, ctx->vertex_elements);
  52    util_blitter_save_vertex_shader(ctx->blitter, ctx->shader.bind_vs);
  53    util_blitter_save_rasterizer(ctx->blitter, ctx->rasterizer);
  54    util_blitter_save_viewport(ctx->blitter, &ctx->viewport_s);
  55    util_blitter_save_scissor(ctx->blitter, &ctx->scissor_s);
  56    util_blitter_save_fragment_shader(ctx->blitter, ctx->shader.bind_fs);
  57    util_blitter_save_blend(ctx->blitter, ctx->blend);
  58    util_blitter_save_depth_stencil_alpha(ctx->blitter, ctx->zsa);
  59    util_blitter_save_stencil_ref(ctx->blitter, &ctx->stencil_ref_s);
  60    util_blitter_save_sample_mask(ctx->blitter, ctx->sample_mask);
  61    util_blitter_save_framebuffer(ctx->blitter, &ctx->framebuffer_s);
  62    util_blitter_save_fragment_sampler_states(ctx->blitter,
  63          ctx->num_fragment_samplers, (void **)ctx->sampler);
  64    util_blitter_save_fragment_sampler_views(ctx->blitter,
  65          ctx->num_fragment_sampler_views, ctx->sampler_view);
  66 }
  67
  68 /* Generate clear command for a surface (non-fast clear case) */
  69 void
  70 etna_rs_gen_clear_surface(struct etna_context *ctx, struct etna_surface *surf,
  71                           uint32_t clear_value)
  72 {
  73    struct etna_resource *dst = etna_resource(surf->base.texture);
  74    uint32_t format = translate_rs_format(surf->base.format);
  75
  76    if (format == ETNA_NO_MATCH) {
  77       BUG("etna_rs_gen_clear_surface: Unhandled clear fmt %s", util_format_name(surf->base.format));
  78       format = RS_FORMAT_A8R8G8B8;
  79       assert(0);
  80    }
  81
  82    /* use tiled clear if width is multiple of 16 */
  83    bool tiled_clear = (surf->surf.padded_width & ETNA_RS_WIDTH_MASK) == 0 &&
  84                       (surf->surf.padded_height & ETNA_RS_HEIGHT_MASK) == 0;
  85
  86    etna_compile_rs_state( ctx, &surf->clear_command, &(struct rs_state) {
  87       .source_format = format,
  88       .dest_format = format,
  89       .dest = dst->bo,
  90       .dest_offset = surf->surf.offset,
  91       .dest_stride = surf->surf.stride,
  92       .dest_padded_height = surf->surf.padded_height,
  93       .dest_tiling = tiled_clear ? dst->layout : ETNA_LAYOUT_LINEAR,
  94       .dither = {0xffffffff, 0xffffffff},
  95       .width = surf->surf.padded_width, /* These must be padded to 16x4 if !LINEAR, otherwise RS will hang */
  96       .height = surf->surf.padded_height,
  97       .clear_value = {clear_value},
  98       .clear_mode = VIVS_RS_CLEAR_CONTROL_MODE_ENABLED1,
  99       .clear_bits = 0xffff
 100    });
 101 }
 102
 103 static void
 104 etna_blit_clear_color(struct pipe_context *pctx, struct pipe_surface *dst,
 105                       const union pipe_color_union *color)
 106 {
 107    struct etna_context *ctx = etna_context(pctx);
 108    struct etna_surface *surf = etna_surface(dst);
 109    uint32_t new_clear_value = translate_clear_color(surf->base.format, color);
 110
 111    if (surf->surf.ts_size) { /* TS: use precompiled clear command */
 112       ctx->framebuffer.TS_COLOR_CLEAR_VALUE = new_clear_value;
 113
 114       if (!DBG_ENABLED(ETNA_DBG_NO_AUTODISABLE) &&
 115           VIV_FEATURE(ctx->screen, chipMinorFeatures1, AUTO_DISABLE)) {
 116          /* Set number of color tiles to be filled */
 117          etna_set_state(ctx->stream, VIVS_TS_COLOR_AUTO_DISABLE_COUNT,
 118                         surf->surf.padded_width * surf->surf.padded_height / 16);
 119          ctx->framebuffer.TS_MEM_CONFIG |= VIVS_TS_MEM_CONFIG_COLOR_AUTO_DISABLE;
 120       }
 121
 122       surf->level->ts_valid = true;
 123       ctx->dirty |= ETNA_DIRTY_TS;
 124    } else if (unlikely(new_clear_value != surf->level->clear_value)) { /* Queue normal RS clear for non-TS surfaces */
 125       /* If clear color changed, re-generate stored command */
 126       etna_rs_gen_clear_surface(ctx, surf, new_clear_value);
 127    }
 128
 129    etna_submit_rs_state(ctx, &surf->clear_command);
 130    surf->level->clear_value = new_clear_value;
 131    resource_written(ctx, surf->base.texture);
 132    etna_resource(surf->base.texture)->seqno++;
 133 }
 134
 135 static void
 136 etna_blit_clear_zs(struct pipe_context *pctx, struct pipe_surface *dst,
 137                    unsigned buffers, double depth, unsigned stencil)
 138 {
 139    struct etna_context *ctx = etna_context(pctx);
 140    struct etna_surface *surf = etna_surface(dst);
 141    uint32_t new_clear_value = translate_clear_depth_stencil(surf->base.format, depth, stencil);
 142    uint32_t new_clear_bits = 0, clear_bits_depth, clear_bits_stencil;
 143
 144    /* Get the channels to clear */
 145    switch (surf->base.format) {
 146    case PIPE_FORMAT_Z16_UNORM:
 147       clear_bits_depth = 0xffff;
 148       clear_bits_stencil = 0;
 149       break;
 150    case PIPE_FORMAT_X8Z24_UNORM:
 151    case PIPE_FORMAT_S8_UINT_Z24_UNORM:
 152       clear_bits_depth = 0xeeee;
 153       clear_bits_stencil = 0x1111;
 154       break;
 155    default:
 156       clear_bits_depth = clear_bits_stencil = 0xffff;
 157       break;
 158    }
 159
 160    if (buffers & PIPE_CLEAR_DEPTH)
 161       new_clear_bits |= clear_bits_depth;
 162    if (buffers & PIPE_CLEAR_STENCIL)
 163       new_clear_bits |= clear_bits_stencil;
 164
 165    /* FIXME: when tile status is enabled, this becomes more complex as
 166     * we may separately clear the depth from the stencil.  In this case,
 167     * we want to resolve the surface, and avoid using the tile status.
 168     * We may be better off recording the pending clear operation,
 169     * delaying the actual clear to the first use.  This way, we can merge
 170     * consecutive clears together. */
 171    if (surf->surf.ts_size) { /* TS: use precompiled clear command */
 172       /* Set new clear depth value */
 173       ctx->framebuffer.TS_DEPTH_CLEAR_VALUE = new_clear_value;
 174       if (!DBG_ENABLED(ETNA_DBG_NO_AUTODISABLE) &&
 175           VIV_FEATURE(ctx->screen, chipMinorFeatures1, AUTO_DISABLE)) {
 176          /* Set number of depth tiles to be filled */
 177          etna_set_state(ctx->stream, VIVS_TS_DEPTH_AUTO_DISABLE_COUNT,
 178                         surf->surf.padded_width * surf->surf.padded_height / 16);
 179          ctx->framebuffer.TS_MEM_CONFIG |= VIVS_TS_MEM_CONFIG_DEPTH_AUTO_DISABLE;
 180       }
 181
 182       surf->level->ts_valid = true;
 183       ctx->dirty |= ETNA_DIRTY_TS;
 184    } else {
 185       if (unlikely(new_clear_value != surf->level->clear_value)) { /* Queue normal RS clear for non-TS surfaces */
 186          /* If clear depth value changed, re-generate stored command */
 187          etna_rs_gen_clear_surface(ctx, surf, new_clear_value);
 188       }
 189       /* Update the channels to be cleared */
 190       etna_modify_rs_clearbits(&surf->clear_command, new_clear_bits);
 191    }
 192
 193    etna_submit_rs_state(ctx, &surf->clear_command);
 194    surf->level->clear_value = new_clear_value;
 195    resource_written(ctx, surf->base.texture);
 196    etna_resource(surf->base.texture)->seqno++;
 197 }
 198
 199 static void
 200 etna_clear(struct pipe_context *pctx, unsigned buffers,
 201            const union pipe_color_union *color, double depth, unsigned stencil)
 202 {
 203    struct etna_context *ctx = etna_context(pctx);
 204
 205    /* Flush color and depth cache before clearing anything.
 206     * This is especially important when coming from another surface, as
 207     * otherwise it may clear part of the old surface instead. */
 208    etna_set_state(ctx->stream, VIVS_GL_FLUSH_CACHE, VIVS_GL_FLUSH_CACHE_COLOR | VIVS_GL_FLUSH_CACHE_DEPTH);
 209    etna_stall(ctx->stream, SYNC_RECIPIENT_RA, SYNC_RECIPIENT_PE);
 210
 211    /* Preparation: Flush the TS if needed. This must be done after flushing
 212     * color and depth, otherwise it can result in crashes */
 213    bool need_ts_flush = false;
 214    if ((buffers & PIPE_CLEAR_COLOR) && ctx->framebuffer_s.nr_cbufs) {
 215       struct etna_surface *surf = etna_surface(ctx->framebuffer_s.cbufs[0]);
 216       if (surf->surf.ts_size)
 217          need_ts_flush = true;
 218    }
 219    if ((buffers & PIPE_CLEAR_DEPTHSTENCIL) && ctx->framebuffer_s.zsbuf != NULL) {
 220       struct etna_surface *surf = etna_surface(ctx->framebuffer_s.zsbuf);
 221
 222       if (surf->surf.ts_size)
 223          need_ts_flush = true;
 224    }
 225
 226    if (need_ts_flush)
 227       etna_set_state(ctx->stream, VIVS_TS_FLUSH_CACHE, VIVS_TS_FLUSH_CACHE_FLUSH);
 228
 229    /* No need to set up the TS here as RS clear operations (in contrast to
 230     * resolve and copy) do not require the TS state.
 231     */
 232    if (buffers & PIPE_CLEAR_COLOR) {
 233       for (int idx = 0; idx < ctx->framebuffer_s.nr_cbufs; ++idx) {
 234          etna_blit_clear_color(pctx, ctx->framebuffer_s.cbufs[idx],
 235                                &color[idx]);
 236       }
 237    }
 238
 239    /* Flush the color and depth caches before each RS clear operation
 240     * This fixes a hang on GC600. */
 241    if (buffers & PIPE_CLEAR_DEPTHSTENCIL && buffers & PIPE_CLEAR_COLOR)
 242       etna_set_state(ctx->stream, VIVS_GL_FLUSH_CACHE,
 243                      VIVS_GL_FLUSH_CACHE_COLOR | VIVS_GL_FLUSH_CACHE_DEPTH);
 244
 245    if ((buffers & PIPE_CLEAR_DEPTHSTENCIL) && ctx->framebuffer_s.zsbuf != NULL)
 246       etna_blit_clear_zs(pctx, ctx->framebuffer_s.zsbuf, buffers, depth, stencil);
 247
 248    etna_stall(ctx->stream, SYNC_RECIPIENT_RA, SYNC_RECIPIENT_PE);
 249 }
 250
 251 static void
 252 etna_clear_render_target(struct pipe_context *pctx, struct pipe_surface *dst,
 253                          const union pipe_color_union *color, unsigned dstx,
 254                          unsigned dsty, unsigned width, unsigned height,
 255                          bool render_condition_enabled)
 256 {
 257    struct etna_context *ctx = etna_context(pctx);
 258
 259    /* XXX could fall back to RS when target area is full screen / resolveable
 260     * and no TS. */
 261    etna_blit_save_state(ctx);
 262    util_blitter_clear_render_target(ctx->blitter, dst, color, dstx, dsty, width, height);
 263 }
 264
 265 static void
 266 etna_clear_depth_stencil(struct pipe_context *pctx, struct pipe_surface *dst,
 267                          unsigned clear_flags, double depth, unsigned stencil,
 268                          unsigned dstx, unsigned dsty, unsigned width,
 269                          unsigned height, bool render_condition_enabled)
 270 {
 271    struct etna_context *ctx = etna_context(pctx);
 272
 273    /* XXX could fall back to RS when target area is full screen / resolveable
 274     * and no TS. */
 275    etna_blit_save_state(ctx);
 276    util_blitter_clear_depth_stencil(ctx->blitter, dst, clear_flags, depth,
 277                                     stencil, dstx, dsty, width, height);
 278 }
 279
 280 static void
 281 etna_resource_copy_region(struct pipe_context *pctx, struct pipe_resource *dst,
 282                           unsigned dst_level, unsigned dstx, unsigned dsty,
 283                           unsigned dstz, struct pipe_resource *src,
 284                           unsigned src_level, const struct pipe_box *src_box)
 285 {
 286    struct etna_context *ctx = etna_context(pctx);
 287
 288    /* The resource must be of the same format. */
 289    assert(src->format == dst->format);
 290    /* Resources with nr_samples > 1 are not allowed. */
 291    assert(src->nr_samples <= 1 && dst->nr_samples <= 1);
 292
 293    /* XXX we can use the RS as a literal copy engine here
 294     * the only complexity is tiling; the size of the boxes needs to be aligned
 295     * to the tile size
 296     * how to handle the case where a resource is copied from/to a non-aligned
 297     * position?
 298     * from non-aligned: can fall back to rendering-based copy?
 299     * to non-aligned: can fall back to rendering-based copy?
 300     * XXX this goes wrong when source surface is supertiled.
 301     */
 302    if (util_blitter_is_copy_supported(ctx->blitter, dst, src)) {
 303       etna_blit_save_state(ctx);
 304       util_blitter_copy_texture(ctx->blitter, dst, dst_level, dstx, dsty, dstz,
 305                                 src, src_level, src_box);
 306    } else {
 307       util_resource_copy_region(pctx, dst, dst_level, dstx, dsty, dstz, src,
 308                                 src_level, src_box);
 309    }
 310 }
 311
 312 static bool
 313 etna_manual_blit(struct etna_resource *dst, struct etna_resource_level *dst_lev,
 314                  unsigned int dst_offset, struct etna_resource *src,
 315                  struct etna_resource_level *src_lev, unsigned int src_offset,
 316                  const struct pipe_blit_info *blit_info)
 317 {
 318    void *smap, *srow, *dmap, *drow;
 319    size_t tile_size;
 320
 321    assert(src->layout == ETNA_LAYOUT_TILED);
 322    assert(dst->layout == ETNA_LAYOUT_TILED);
 323    assert(src->base.nr_samples == 0);
 324    assert(dst->base.nr_samples == 0);
 325
 326    tile_size = util_format_get_blocksize(blit_info->src.format) * 4 * 4;
 327
 328    smap = etna_bo_map(src->bo);
 329    if (!smap)
 330       return false;
 331
 332    dmap = etna_bo_map(dst->bo);
 333    if (!dmap)
 334       return false;
 335
 336    srow = smap + src_offset;
 337    drow = dmap + dst_offset;
 338
 339    etna_bo_cpu_prep(src->bo, DRM_ETNA_PREP_READ);
 340    etna_bo_cpu_prep(dst->bo, DRM_ETNA_PREP_WRITE);
 341
 342    for (int y = 0; y < blit_info->src.box.height; y += 4) {
 343       memcpy(drow, srow, tile_size * blit_info->src.box.width);
 344       srow += src_lev->stride * 4;
 345       drow += dst_lev->stride * 4;
 346    }
 347
 348    etna_bo_cpu_fini(dst->bo);
 349    etna_bo_cpu_fini(src->bo);
 350
 351    return true;
 352 }
 353
 354 static bool
 355 etna_try_rs_blit(struct pipe_context *pctx,
 356                  const struct pipe_blit_info *blit_info)
 357 {
 358    struct etna_context *ctx = etna_context(pctx);
 359    struct etna_resource *src = etna_resource(blit_info->src.resource);
 360    struct etna_resource *dst = etna_resource(blit_info->dst.resource);
 361    struct compiled_rs_state copy_to_screen;
 362    uint32_t ts_mem_config = 0;
 363    int msaa_xscale = 1, msaa_yscale = 1;
 364
 365    /* Ensure that the level is valid */
 366    assert(blit_info->src.level <= src->base.last_level);
 367    assert(blit_info->dst.level <= dst->base.last_level);
 368
 369    if (!translate_samples_to_xyscale(src->base.nr_samples, &msaa_xscale, &msaa_yscale, NULL))
 370       return FALSE;
 371
 372    /* The width/height are in pixels; they do not change as a result of
 373     * multi-sampling. So, when blitting from a 4x multisampled surface
 374     * to a non-multisampled surface, the width and height will be
 375     * identical. As we do not support scaling, reject different sizes. */
 376    if (blit_info->dst.box.width != blit_info->src.box.width ||
 377        blit_info->dst.box.height != blit_info->src.box.height) {
 378       DBG("scaling requested: source %dx%d destination %dx%d",
 379           blit_info->src.box.width, blit_info->src.box.height,
 380           blit_info->dst.box.width, blit_info->dst.box.height);
 381       return FALSE;
 382    }
 383
 384    /* No masks - RS can't copy specific channels */
 385    unsigned mask = util_format_get_mask(blit_info->dst.format);
 386    if ((blit_info->mask & mask) != mask) {
 387       DBG("sub-mask requested: 0x%02x vs format mask 0x%02x", blit_info->mask, mask);
 388       return FALSE;
 389    }
 390
 391    unsigned src_format = etna_compatible_rs_format(blit_info->src.format);
 392    unsigned dst_format = etna_compatible_rs_format(blit_info->src.format);
 393    if (translate_rs_format(src_format) == ETNA_NO_MATCH ||
 394        translate_rs_format(dst_format) == ETNA_NO_MATCH ||
 395        blit_info->scissor_enable || blit_info->src.box.x != 0 ||
 396        blit_info->src.box.y != 0 || blit_info->dst.box.x != 0 ||
 397        blit_info->dst.box.y != 0 ||
 398        blit_info->dst.box.depth != blit_info->src.box.depth ||
 399        blit_info->dst.box.depth != 1) {
 400       return FALSE;
 401    }
 402
 403    /* Ensure that the Z coordinate is sane */
 404    if (dst->base.target != PIPE_TEXTURE_CUBE)
 405       assert(blit_info->dst.box.z == 0);
 406    if (src->base.target != PIPE_TEXTURE_CUBE)
 407       assert(blit_info->src.box.z == 0);
 408
 409    assert(blit_info->src.box.z < src->base.array_size);
 410    assert(blit_info->dst.box.z < dst->base.array_size);
 411
 412    struct etna_resource_level *src_lev = &src->levels[blit_info->src.level];
 413    struct etna_resource_level *dst_lev = &dst->levels[blit_info->dst.level];
 414
 415    /* we may be given coordinates up to the padded width to avoid
 416     * any alignment issues with different tiling formats */
 417    assert((blit_info->src.box.x + blit_info->src.box.width) * msaa_xscale <= src_lev->padded_width);
 418    assert((blit_info->src.box.y + blit_info->src.box.height) * msaa_yscale <= src_lev->padded_height);
 419    assert(blit_info->dst.box.x + blit_info->dst.box.width <= dst_lev->padded_width);
 420    assert(blit_info->dst.box.y + blit_info->dst.box.height <= dst_lev->padded_height);
 421
 422    unsigned src_offset =
 423       src_lev->offset + blit_info->src.box.z * src_lev->layer_stride;
 424    unsigned dst_offset =
 425       dst_lev->offset + blit_info->dst.box.z * dst_lev->layer_stride;
 426
 427    if (src_lev->padded_width <= ETNA_RS_WIDTH_MASK ||
 428        dst_lev->padded_width <= ETNA_RS_WIDTH_MASK ||
 429        src_lev->padded_height <= ETNA_RS_HEIGHT_MASK ||
 430        dst_lev->padded_height <= ETNA_RS_HEIGHT_MASK)
 431       goto manual;
 432
 433    /* If the width is not aligned to the RS width, but is within our
 434     * padding, adjust the width to suite the RS width restriction.
 435     * Note: the RS width/height are converted to source samples here. */
 436    unsigned int width = blit_info->src.box.width * msaa_xscale;
 437    unsigned int height = blit_info->src.box.height * msaa_yscale;
 438    unsigned int w_align = ETNA_RS_WIDTH_MASK + 1;
 439    unsigned int h_align = (ETNA_RS_HEIGHT_MASK + 1) * ctx->specs.pixel_pipes;
 440
 441    if (width & (w_align - 1) && width >= src_lev->width * msaa_xscale && width >= dst_lev->width)
 442       width = align(width, w_align);
 443
 444    if (height & (h_align - 1) && height >= src_lev->height * msaa_yscale && height >= dst_lev->height)
 445       height = align(height, h_align);
 446
 447    /* The padded dimensions are in samples */
 448    if (width > src_lev->padded_width ||
 449        width > dst_lev->padded_width * msaa_xscale ||
 450        height > src_lev->padded_height ||
 451        height > dst_lev->padded_height * msaa_yscale)
 452       goto manual;
 453
 454    if (src->base.nr_samples > 1) {
 455       uint32_t msaa_format = translate_msaa_format(src_format);
 456       assert(msaa_format != ETNA_NO_MATCH);
 457       ts_mem_config |= VIVS_TS_MEM_CONFIG_MSAA | msaa_format;
 458    }
 459
 460    uint32_t to_flush = 0;
 461
 462    if (src->base.bind & PIPE_BIND_RENDER_TARGET)
 463       to_flush |= VIVS_GL_FLUSH_CACHE_COLOR;
 464    if (src->base.bind & PIPE_BIND_DEPTH_STENCIL)
 465       to_flush |= VIVS_GL_FLUSH_CACHE_DEPTH;
 466
 467    if (to_flush) {
 468       etna_set_state(ctx->stream, VIVS_GL_FLUSH_CACHE, to_flush);
 469       etna_stall(ctx->stream, SYNC_RECIPIENT_RA, SYNC_RECIPIENT_PE);
 470    }
 471
 472    /* Set up color TS to source surface before blit, if needed */
 473    if (src->levels[blit_info->src.level].ts_size &&
 474        src->levels[blit_info->src.level].ts_valid) {
 475       struct etna_reloc reloc;
 476       unsigned ts_offset =
 477          src_lev->ts_offset + blit_info->src.box.z * src_lev->ts_layer_stride;
 478
 479       etna_set_state(ctx->stream, VIVS_TS_MEM_CONFIG,
 480                      VIVS_TS_MEM_CONFIG_COLOR_FAST_CLEAR | ts_mem_config);
 481
 482       memset(&reloc, 0, sizeof(struct etna_reloc));
 483       reloc.bo = src->ts_bo;
 484       reloc.offset = ts_offset;
 485       reloc.flags = ETNA_RELOC_READ;
 486       etna_set_state_reloc(ctx->stream, VIVS_TS_COLOR_STATUS_BASE, &reloc);
 487
 488       memset(&reloc, 0, sizeof(struct etna_reloc));
 489       reloc.bo = src->bo;
 490       reloc.offset = src_offset;
 491       reloc.flags = ETNA_RELOC_READ;
 492       etna_set_state_reloc(ctx->stream, VIVS_TS_COLOR_SURFACE_BASE, &reloc);
 493
 494       etna_set_state(ctx->stream, VIVS_TS_COLOR_CLEAR_VALUE,
 495                      src->levels[blit_info->src.level].clear_value);
 496    } else {
 497       etna_set_state(ctx->stream, VIVS_TS_MEM_CONFIG, ts_mem_config);
 498    }
 499    ctx->dirty |= ETNA_DIRTY_TS;
 500
 501    /* Kick off RS here */
 502    etna_compile_rs_state(ctx, &copy_to_screen, &(struct rs_state) {
 503       .source_format = translate_rs_format(src_format),
 504       .source_tiling = src->layout,
 505       .source = src->bo,
 506       .source_offset = src_offset,
 507       .source_stride = src_lev->stride,
 508       .source_padded_height = src_lev->padded_height,
 509       .dest_format = translate_rs_format(dst_format),
 510       .dest_tiling = dst->layout,
 511       .dest = dst->bo,
 512       .dest_offset = dst_offset,
 513       .dest_stride = dst_lev->stride,
 514       .dest_padded_height = dst_lev->padded_height,
 515       .downsample_x = msaa_xscale > 1,
 516       .downsample_y = msaa_yscale > 1,
 517       .swap_rb = translate_rb_src_dst_swap(src->base.format, dst->base.format),
 518       .dither = {0xffffffff, 0xffffffff}, // XXX dither when going from 24 to 16 bit?
 519       .clear_mode = VIVS_RS_CLEAR_CONTROL_MODE_DISABLED,
 520       .width = width,
 521       .height = height
 522    });
 523
 524    etna_submit_rs_state(ctx, &copy_to_screen);
 525    resource_written(ctx, &dst->base);
 526    dst->seqno++;
 527    dst->levels[blit_info->dst.level].ts_valid = false;
 528
 529    return TRUE;
 530
 531 manual:
 532    if (src->layout == ETNA_LAYOUT_TILED && dst->layout == ETNA_LAYOUT_TILED) {
 533       etna_resource_wait(pctx, dst);
 534       etna_resource_wait(pctx, src);
 535       return etna_manual_blit(dst, dst_lev, dst_offset, src, src_lev, src_offset, blit_info);
 536    }
 537
 538    return FALSE;
 539 }
 540
 541 static void
 542 etna_blit(struct pipe_context *pctx, const struct pipe_blit_info *blit_info)
 543 {
 544    /* This is a more extended version of resource_copy_region */
 545    /* TODO Some cases can be handled by RS; if not, fall back to rendering or
 546     * even CPU copy block of pixels from info->src to info->dst
 547     * (resource, level, box, format);
 548     * function is used for scaling, flipping in x and y direction (negative
 549     * width/height), format conversion, mask and filter and even a scissor rectangle
 550     *
 551     * What can the RS do for us:
 552     *   convert between tiling formats (layouts)
 553     *   downsample 2x in x and y
 554     *   convert between a limited number of pixel formats
 555     *
 556     * For the rest, fall back to util_blitter
 557     * XXX this goes wrong when source surface is supertiled. */
 558    struct etna_context *ctx = etna_context(pctx);
 559    struct pipe_blit_info info = *blit_info;
 560
 561    if (info.src.resource->nr_samples > 1 &&
 562        info.dst.resource->nr_samples <= 1 &&
 563        !util_format_is_depth_or_stencil(info.src.resource->format) &&
 564        !util_format_is_pure_integer(info.src.resource->format)) {
 565       DBG("color resolve unimplemented");
 566       return;
 567    }
 568
 569    if (etna_try_rs_blit(pctx, blit_info))
 570       return;
 571
 572    if (util_try_blit_via_copy_region(pctx, blit_info))
 573       return;
 574
 575    if (info.mask & PIPE_MASK_S) {
 576       DBG("cannot blit stencil, skipping");
 577       info.mask &= ~PIPE_MASK_S;
 578    }
 579
 580    if (!util_blitter_is_blit_supported(ctx->blitter, &info)) {
 581       DBG("blit unsupported %s -> %s",
 582           util_format_short_name(info.src.resource->format),
 583           util_format_short_name(info.dst.resource->format));
 584       return;
 585    }
 586
 587    etna_blit_save_state(ctx);
 588    util_blitter_blit(ctx->blitter, &info);
 589 }
 590
 591 static void
 592 etna_flush_resource(struct pipe_context *pctx, struct pipe_resource *prsc)
 593 {
 594    struct etna_resource *rsc = etna_resource(prsc);
 595
 596    if (rsc->scanout)
 597       etna_copy_resource(pctx, rsc->scanout->prime, prsc, 0, 0);
 598 }
 599
 600 void
 601 etna_copy_resource(struct pipe_context *pctx, struct pipe_resource *dst,
 602                    struct pipe_resource *src, int first_level, int last_level)
 603 {
 604    struct etna_resource *src_priv = etna_resource(src);
 605    struct etna_resource *dst_priv = etna_resource(dst);
 606
 607    assert(src->format == dst->format);
 608    assert(src->array_size == dst->array_size);
 609    assert(last_level <= dst->last_level && last_level <= src->last_level);
 610
 611    struct pipe_blit_info blit = {};
 612    blit.mask = util_format_get_mask(dst->format);
 613    blit.filter = PIPE_TEX_FILTER_NEAREST;
 614    blit.src.resource = src;
 615    blit.src.format = src->format;
 616    blit.dst.resource = dst;
 617    blit.dst.format = dst->format;
 618    blit.dst.box.depth = blit.src.box.depth = 1;
 619
 620    /* Copy each level and each layer */
 621    for (int level = first_level; level <= last_level; level++) {
 622       blit.src.level = blit.dst.level = level;
 623       blit.src.box.width = blit.dst.box.width =
 624          MIN2(src_priv->levels[level].width, dst_priv->levels[level].width);
 625       blit.src.box.height = blit.dst.box.height =
 626          MIN2(src_priv->levels[level].height, dst_priv->levels[level].height);
 627
 628       for (int layer = 0; layer < dst->array_size; layer++) {
 629          blit.src.box.z = blit.dst.box.z = layer;
 630          pctx->blit(pctx, &blit);
 631       }
 632    }
 633 }
 634
 635 void
 636 etna_clear_blit_init(struct pipe_context *pctx)
 637 {
 638    pctx->clear = etna_clear;
 639    pctx->clear_render_target = etna_clear_render_target;
 640    pctx->clear_depth_stencil = etna_clear_depth_stencil;
 641    pctx->resource_copy_region = etna_resource_copy_region;
 642    pctx->blit = etna_blit;
 643    pctx->flush_resource = etna_flush_resource;
 644 }