src/gallium/drivers/panfrost/pan_mfbd.c

   1 /*
   2  * Copyright 2018-2019 Alyssa Rosenzweig
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  20  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  21  * SOFTWARE.
  22  *
  23  */
  24
  25 #include "pan_context.h"
  26 #include "pan_util.h"
  27 #include "pan_format.h"
  28
  29 #include "util/u_format.h"
  30
  31 static void
  32 panfrost_invert_swizzle(const unsigned char *in, unsigned char *out)
  33 {
  34         /* First, default to all zeroes to prevent uninitialized junk */
  35
  36         for (unsigned c = 0; c < 4; ++c)
  37                 out[c] = PIPE_SWIZZLE_0;
  38
  39         /* Now "do" what the swizzle says */
  40
  41         for (unsigned c = 0; c < 4; ++c) {
  42                 unsigned char i = in[c];
  43
  44                 /* Who cares? */
  45                 if (i < PIPE_SWIZZLE_X || i > PIPE_SWIZZLE_W)
  46                         continue;
  47
  48                 /* Invert */
  49                 unsigned idx = i - PIPE_SWIZZLE_X;
  50                 out[idx] = PIPE_SWIZZLE_X + c;
  51         }
  52 }
  53
  54 static struct mali_rt_format
  55 panfrost_mfbd_format(struct pipe_surface *surf)
  56 {
  57         /* Explode details on the format */
  58
  59         const struct util_format_description *desc =
  60                 util_format_description(surf->format);
  61
  62         /* The swizzle for rendering is inverted from texturing */
  63
  64         unsigned char swizzle[4];
  65         panfrost_invert_swizzle(desc->swizzle, swizzle);
  66
  67         /* Fill in accordingly, defaulting to 8-bit UNORM */
  68
  69         struct mali_rt_format fmt = {
  70                 .unk1 = 0x4000000,
  71                 .unk2 = 0x1,
  72                 .nr_channels = MALI_POSITIVE(desc->nr_channels),
  73                 .unk3 = 0x4,
  74                 .flags = 0x8,
  75                 .swizzle = panfrost_translate_swizzle_4(swizzle),
  76                 .unk4 = 0x8
  77         };
  78
  79         if (desc->colorspace == UTIL_FORMAT_COLORSPACE_SRGB)
  80                 fmt.flags |= MALI_MFBD_FORMAT_SRGB;
  81
  82         /* Set flags for alternative formats */
  83
  84         bool float_16 =
  85                 surf->format == PIPE_FORMAT_R16_FLOAT;
  86
  87         bool float_32 =
  88                 surf->format == PIPE_FORMAT_R11G11B10_FLOAT ||
  89                 surf->format == PIPE_FORMAT_R32_FLOAT ||
  90                 surf->format == PIPE_FORMAT_R16G16_FLOAT;
  91
  92         bool float_64 =
  93                 surf->format == PIPE_FORMAT_R32G32_FLOAT ||
  94                 surf->format == PIPE_FORMAT_R16G16B16A16_FLOAT;
  95
  96         bool float_128 =
  97                 surf->format == PIPE_FORMAT_R32G32B32A32_FLOAT;
  98
  99         if (surf->format == PIPE_FORMAT_B5G6R5_UNORM) {
 100                 fmt.unk1 = 0x14000000;
 101                 fmt.nr_channels = MALI_POSITIVE(2);
 102                 fmt.unk3 |= 0x1;
 103         } else if (float_32) {
 104                 fmt.unk1 = 0x88000000;
 105                 fmt.unk3 = 0x0;
 106                 fmt.nr_channels = MALI_POSITIVE(4);
 107         } else if (float_16) {
 108                 fmt.unk1 = 0x84000000;
 109                 fmt.unk3 = 0x0;
 110                 fmt.nr_channels = MALI_POSITIVE(2);
 111         } else if (float_64) {
 112                 fmt.unk1 = 0x8c000000;
 113                 fmt.unk3 = 0x1;
 114                 fmt.nr_channels = MALI_POSITIVE(2);
 115         } else if (float_128) {
 116                 fmt.unk1 = 0x90000000;
 117                 fmt.unk3 = 0x1;
 118                 fmt.nr_channels = MALI_POSITIVE(4);
 119         }
 120
 121         return fmt;
 122 }
 123
 124
 125 static void
 126 panfrost_mfbd_clear(
 127                 struct panfrost_job *job,
 128                 struct bifrost_framebuffer *fb,
 129                 struct bifrost_fb_extra *fbx,
 130                 struct bifrost_render_target *rts,
 131                 unsigned rt_count)
 132 {
 133         for (unsigned i = 0; i < rt_count; ++i) {
 134                 if (!(job->clear & (PIPE_CLEAR_COLOR0 << i)))
 135                         continue;
 136
 137                 rts[i].clear_color_1 = job->clear_color[i][0];
 138                 rts[i].clear_color_2 = job->clear_color[i][1];
 139                 rts[i].clear_color_3 = job->clear_color[i][2];
 140                 rts[i].clear_color_4 = job->clear_color[i][3];
 141         }
 142
 143         if (job->clear & PIPE_CLEAR_DEPTH) {
 144                 fb->clear_depth = job->clear_depth;
 145         }
 146
 147         if (job->clear & PIPE_CLEAR_STENCIL) {
 148                 fb->clear_stencil = job->clear_stencil;
 149         }
 150 }
 151
 152 static void
 153 panfrost_mfbd_set_cbuf(
 154                 struct bifrost_render_target *rt,
 155                 struct pipe_surface *surf)
 156 {
 157         struct panfrost_resource *rsrc = pan_resource(surf->texture);
 158
 159         unsigned level = surf->u.tex.level;
 160         unsigned first_layer = surf->u.tex.first_layer;
 161         assert(surf->u.tex.last_layer == first_layer);
 162         int stride = rsrc->slices[level].stride;
 163
 164         mali_ptr base = panfrost_get_texture_address(rsrc, level, first_layer);
 165
 166         rt->format = panfrost_mfbd_format(surf);
 167
 168         /* Now, we set the layout specific pieces */
 169
 170         if (rsrc->layout == PAN_LINEAR) {
 171                 rt->format.block = MALI_MFBD_BLOCK_LINEAR;
 172                 rt->framebuffer = base;
 173                 rt->framebuffer_stride = stride / 16;
 174         } else if (rsrc->layout == PAN_TILED) {
 175                 rt->format.block = MALI_MFBD_BLOCK_TILED;
 176                 rt->framebuffer = base;
 177                 rt->framebuffer_stride = stride;
 178         } else if (rsrc->layout == PAN_AFBC) {
 179                 rt->format.block = MALI_MFBD_BLOCK_AFBC;
 180
 181                 unsigned header_size = rsrc->slices[level].header_size;
 182
 183                 rt->framebuffer = base + header_size;
 184                 rt->afbc.metadata = base;
 185                 rt->afbc.stride = 0;
 186                 rt->afbc.unk = 0x30009;
 187
 188                 /* TODO: Investigate shift */
 189                 rt->framebuffer_stride = stride << 1;
 190         } else {
 191                 fprintf(stderr, "Invalid render layout (cbuf)");
 192                 assert(0);
 193         }
 194 }
 195
 196 static void
 197 panfrost_mfbd_set_zsbuf(
 198                 struct bifrost_framebuffer *fb,
 199                 struct bifrost_fb_extra *fbx,
 200                 struct pipe_surface *surf)
 201 {
 202         struct panfrost_resource *rsrc = pan_resource(surf->texture);
 203
 204         unsigned level = surf->u.tex.level;
 205         assert(surf->u.tex.first_layer == 0);
 206
 207         unsigned offset = rsrc->slices[level].offset;
 208
 209         if (rsrc->layout == PAN_AFBC) {
 210                 mali_ptr base = rsrc->bo->gpu + offset;
 211                 unsigned header_size = rsrc->slices[level].header_size;
 212
 213                 fb->mfbd_flags |= MALI_MFBD_EXTRA;
 214
 215                 fbx->flags =
 216                         MALI_EXTRA_PRESENT |
 217                         MALI_EXTRA_AFBC |
 218                         MALI_EXTRA_AFBC_ZS |
 219                         MALI_EXTRA_ZS |
 220                         0x1; /* unknown */
 221
 222                 fbx->ds_afbc.depth_stencil = base + header_size;
 223                 fbx->ds_afbc.depth_stencil_afbc_metadata = base;
 224                 fbx->ds_afbc.depth_stencil_afbc_stride = 0;
 225
 226                 fbx->ds_afbc.zero1 = 0x10009;
 227                 fbx->ds_afbc.padding = 0x1000;
 228         } else if (rsrc->layout == PAN_LINEAR) {
 229                 int stride = rsrc->slices[level].stride;
 230                 fb->mfbd_flags |= MALI_MFBD_EXTRA;
 231
 232                 fbx->flags |= MALI_EXTRA_PRESENT | MALI_EXTRA_ZS | 0x1;
 233
 234                 fbx->ds_linear.depth = rsrc->bo->gpu + offset;
 235                 fbx->ds_linear.depth_stride = stride;
 236         } else {
 237                 assert(0);
 238         }
 239 }
 240
 241 /* Helper for sequential uploads used for MFBD */
 242
 243 #define UPLOAD(dest, offset, src, max) { \
 244         size_t sz = sizeof(*src); \
 245         memcpy(dest.cpu + offset, src, sz); \
 246         assert((offset + sz) <= max); \
 247         offset += sz; \
 248 }
 249
 250 static mali_ptr
 251 panfrost_mfbd_upload(
 252                 struct panfrost_context *ctx,
 253                 struct bifrost_framebuffer *fb,
 254                 struct bifrost_fb_extra *fbx,
 255                 struct bifrost_render_target *rts,
 256                 unsigned cbufs)
 257 {
 258         off_t offset = 0;
 259
 260         /* There may be extra data stuck in the middle */
 261         bool has_extra = fb->mfbd_flags & MALI_MFBD_EXTRA;
 262
 263         /* Compute total size for transfer */
 264
 265         size_t total_sz =
 266                 sizeof(struct bifrost_framebuffer) +
 267                 (has_extra ? sizeof(struct bifrost_fb_extra) : 0) +
 268                 sizeof(struct bifrost_render_target) * cbufs;
 269
 270         struct panfrost_transfer m_f_trans =
 271                 panfrost_allocate_transient(ctx, total_sz);
 272
 273         /* Do the transfer */
 274
 275         UPLOAD(m_f_trans, offset, fb, total_sz);
 276
 277         if (has_extra)
 278                 UPLOAD(m_f_trans, offset, fbx, total_sz);
 279
 280         for (unsigned c = 0; c < cbufs; ++c) {
 281                 UPLOAD(m_f_trans, offset, &rts[c], total_sz);
 282         }
 283
 284         /* Return pointer suitable for the fragment section */
 285         return m_f_trans.gpu | MALI_MFBD | (has_extra ? 2 : 0);
 286 }
 287
 288 #undef UPLOAD
 289
 290 /* Creates an MFBD for the FRAGMENT section of the bound framebuffer */
 291
 292 mali_ptr
 293 panfrost_mfbd_fragment(struct panfrost_context *ctx, bool has_draws)
 294 {
 295         struct panfrost_job *job = panfrost_get_job_for_fbo(ctx);
 296
 297         struct bifrost_framebuffer fb = panfrost_emit_mfbd(ctx, has_draws);
 298         struct bifrost_fb_extra fbx = {};
 299         struct bifrost_render_target rts[4] = {};
 300
 301         /* XXX: MRT case */
 302         fb.rt_count_2 = 1;
 303         fb.mfbd_flags = 0x100;
 304
 305         /* TODO: MRT clear */
 306         panfrost_mfbd_clear(job, &fb, &fbx, rts, fb.rt_count_2);
 307
 308         for (int cb = 0; cb < ctx->pipe_framebuffer.nr_cbufs; ++cb) {
 309                 struct pipe_surface *surf = ctx->pipe_framebuffer.cbufs[cb];
 310                 unsigned bpp = util_format_get_blocksize(surf->format);
 311
 312                 panfrost_mfbd_set_cbuf(&rts[cb], surf);
 313
 314                 /* What is this? Looks like some extension of the bpp field.
 315                  * Maybe it establishes how much internal tilebuffer space is
 316                  * reserved? */
 317                 fb.rt_count_2 = MAX2(fb.rt_count_2, ALIGN_POT(bpp, 4) / 4);
 318         }
 319
 320         if (ctx->pipe_framebuffer.zsbuf) {
 321                 panfrost_mfbd_set_zsbuf(&fb, &fbx, ctx->pipe_framebuffer.zsbuf);
 322         }
 323
 324         /* For the special case of a depth-only FBO, we need to attach a dummy render target */
 325
 326         if (ctx->pipe_framebuffer.nr_cbufs == 0) {
 327                 struct mali_rt_format null_rt = {
 328                         .unk1 = 0x4000000,
 329                         .unk4 = 0x8
 330                 };
 331
 332                 rts[0].format = null_rt;
 333                 rts[0].framebuffer = 0;
 334                 rts[0].framebuffer_stride = 0;
 335         }
 336
 337         /* When scanning out, the depth buffer is immediately invalidated, so
 338          * we don't need to waste bandwidth writing it out. This can improve
 339          * performance substantially (Z32_UNORM 1080p @ 60fps is 475 MB/s of
 340          * memory bandwidth!).
 341          *
 342          * The exception is ReadPixels, but this is not supported on GLES so we
 343          * can safely ignore it. */
 344
 345         if (panfrost_is_scanout(ctx)) {
 346                 job->requirements &= ~PAN_REQ_DEPTH_WRITE;
 347         }
 348
 349         /* Actualize the requirements */
 350
 351         if (job->requirements & PAN_REQ_MSAA) {
 352                 rts[0].format.flags |= MALI_MFBD_FORMAT_MSAA;
 353
 354                 /* XXX */
 355                 fb.unk1 |= (1 << 4) | (1 << 1);
 356                 fb.rt_count_2 = 4;
 357         }
 358
 359         if (job->requirements & PAN_REQ_DEPTH_WRITE)
 360                 fb.mfbd_flags |= MALI_MFBD_DEPTH_WRITE;
 361
 362         /* Checksumming only works with a single render target */
 363
 364         if (ctx->pipe_framebuffer.nr_cbufs == 1) {
 365                 struct pipe_surface *surf = ctx->pipe_framebuffer.cbufs[0];
 366                 struct panfrost_resource *rsrc = pan_resource(surf->texture);
 367                 struct panfrost_bo *bo = rsrc->bo;
 368
 369                 if (rsrc->checksummed) {
 370                         unsigned level = surf->u.tex.level;
 371                         struct panfrost_slice *slice = &rsrc->slices[level];
 372
 373                         fb.mfbd_flags |= MALI_MFBD_EXTRA;
 374                         fbx.flags |= MALI_EXTRA_PRESENT;
 375                         fbx.checksum_stride = slice->checksum_stride;
 376                         fbx.checksum = bo->gpu + slice->checksum_offset;
 377                 }
 378         }
 379
 380         /* We always upload at least one (dummy) cbuf */
 381         unsigned cbufs = MAX2(ctx->pipe_framebuffer.nr_cbufs, 1);
 382
 383         return panfrost_mfbd_upload(ctx, &fb, &fbx, rts, cbufs);
 384 }