src/gallium/drivers/nvfx/nvfx_push.c

   1 #include "pipe/p_context.h"
   2 #include "pipe/p_state.h"
   3 #include "util/u_inlines.h"
   4 #include "util/u_format.h"
   5 #include "util/u_split_prim.h"
   6 #include "translate/translate.h"
   7
   8 #include "nvfx_context.h"
   9 #include "nvfx_resource.h"
  10
  11 struct push_context {
  12         struct nouveau_channel* chan;
  13         struct nouveau_grobj *eng3d;
  14
  15         void *idxbuf;
  16         int32_t idxbias;
  17
  18         float edgeflag;
  19         int edgeflag_attr;
  20
  21         unsigned vertex_length;
  22         unsigned max_vertices_per_packet;
  23
  24         struct translate* translate;
  25 };
  26
  27 static void
  28 emit_edgeflag(void *priv, boolean enabled)
  29 {
  30         struct push_context* ctx = priv;
  31         struct nouveau_grobj *eng3d = ctx->eng3d;
  32         struct nouveau_channel *chan = ctx->chan;
  33
  34         BEGIN_RING(chan, eng3d, NV30_3D_EDGEFLAG, 1);
  35         OUT_RING(chan, enabled ? 1 : 0);
  36 }
  37
  38 static void
  39 emit_vertices_lookup8(void *priv, unsigned start, unsigned count)
  40 {
  41         struct push_context *ctx = priv;
  42         struct nouveau_grobj *eng3d = ctx->eng3d;
  43         uint8_t* elts = (uint8_t*)ctx->idxbuf + start;
  44
  45         while(count)
  46         {
  47                 unsigned push = MIN2(count, ctx->max_vertices_per_packet);
  48                 unsigned length = push * ctx->vertex_length;
  49
  50                 BEGIN_RING_NI(ctx->chan, eng3d, NV30_3D_VERTEX_DATA, length);
  51                 ctx->translate->run_elts8(ctx->translate, elts, push, 0, ctx->chan->cur);
  52                 ctx->chan->cur += length;
  53
  54                 count -= push;
  55                 elts += push;
  56         }
  57 }
  58
  59 static void
  60 emit_vertices_lookup16(void *priv, unsigned start, unsigned count)
  61 {
  62         struct push_context *ctx = priv;
  63         struct nouveau_grobj *eng3d = ctx->eng3d;
  64         uint16_t* elts = (uint16_t*)ctx->idxbuf + start;
  65
  66         while(count)
  67         {
  68                 unsigned push = MIN2(count, ctx->max_vertices_per_packet);
  69                 unsigned length = push * ctx->vertex_length;
  70
  71                 BEGIN_RING_NI(ctx->chan, eng3d, NV30_3D_VERTEX_DATA, length);
  72                 ctx->translate->run_elts16(ctx->translate, elts, push, 0, ctx->chan->cur);
  73                 ctx->chan->cur += length;
  74
  75                 count -= push;
  76                 elts += push;
  77         }
  78 }
  79
  80 static void
  81 emit_vertices_lookup32(void *priv, unsigned start, unsigned count)
  82 {
  83         struct push_context *ctx = priv;
  84         struct nouveau_grobj *eng3d = ctx->eng3d;
  85         uint32_t* elts = (uint32_t*)ctx->idxbuf + start;
  86
  87         while(count)
  88         {
  89                 unsigned push = MIN2(count, ctx->max_vertices_per_packet);
  90                 unsigned length = push * ctx->vertex_length;
  91
  92                 BEGIN_RING_NI(ctx->chan, eng3d, NV30_3D_VERTEX_DATA, length);
  93                 ctx->translate->run_elts(ctx->translate, elts, push, 0, ctx->chan->cur);
  94                 ctx->chan->cur += length;
  95
  96                 count -= push;
  97                 elts += push;
  98         }
  99 }
 100
 101 static void
 102 emit_vertices(void *priv, unsigned start, unsigned count)
 103 {
 104         struct push_context *ctx = priv;
 105         struct nouveau_grobj *eng3d = ctx->eng3d;
 106
 107         while(count)
 108         {
 109                 unsigned push = MIN2(count, ctx->max_vertices_per_packet);
 110                 unsigned length = push * ctx->vertex_length;
 111
 112                 BEGIN_RING_NI(ctx->chan, eng3d, NV30_3D_VERTEX_DATA, length);
 113                 ctx->translate->run(ctx->translate, start, push, 0, ctx->chan->cur);
 114                 ctx->chan->cur += length;
 115
 116                 count -= push;
 117                 start += push;
 118         }
 119 }
 120
 121 static void
 122 emit_ranges(void* priv, unsigned start, unsigned vc, unsigned reg)
 123 {
 124         struct push_context* ctx = priv;
 125         struct nouveau_grobj *eng3d = ctx->eng3d;
 126         struct nouveau_channel *chan = ctx->chan;
 127         unsigned nr = (vc & 0xff);
 128         if (nr) {
 129                 BEGIN_RING(chan, eng3d, reg, 1);
 130                 OUT_RING  (chan, ((nr - 1) << 24) | start);
 131                 start += nr;
 132         }
 133
 134         nr = vc >> 8;
 135         while (nr) {
 136                 unsigned push = nr > 2047 ? 2047 : nr;
 137
 138                 nr -= push;
 139
 140                 BEGIN_RING_NI(chan, eng3d, reg, push);
 141                 while (push--) {
 142                         OUT_RING(chan, ((0x100 - 1) << 24) | start);
 143                         start += 0x100;
 144                 }
 145         }
 146 }
 147
 148 static void
 149 emit_ib_ranges(void* priv, unsigned start, unsigned vc)
 150 {
 151         emit_ranges(priv, start, vc, NV30_3D_VB_INDEX_BATCH);
 152 }
 153
 154 static void
 155 emit_vb_ranges(void* priv, unsigned start, unsigned vc)
 156 {
 157         emit_ranges(priv, start, vc, NV30_3D_VB_VERTEX_BATCH);
 158 }
 159
 160 static INLINE void
 161 emit_elt8(void* priv, unsigned start, unsigned vc)
 162 {
 163         struct push_context* ctx = priv;
 164         struct nouveau_grobj *eng3d = ctx->eng3d;
 165         struct nouveau_channel *chan = ctx->chan;
 166         uint8_t *elts = (uint8_t *)ctx->idxbuf + start;
 167         int idxbias = ctx->idxbias;
 168
 169         if (vc & 1) {
 170                 BEGIN_RING(chan, eng3d, NV30_3D_VB_ELEMENT_U32, 1);
 171                 OUT_RING  (chan, elts[0]);
 172                 elts++; vc--;
 173         }
 174
 175         while (vc) {
 176                 unsigned i;
 177                 unsigned push = MIN2(vc, 2047 * 2);
 178
 179                 BEGIN_RING_NI(chan, eng3d, NV30_3D_VB_ELEMENT_U16, push >> 1);
 180                 for (i = 0; i < push; i+=2)
 181                         OUT_RING(chan, ((elts[i+1] + idxbias) << 16) | (elts[i] + idxbias));
 182
 183                 vc -= push;
 184                 elts += push;
 185         }
 186 }
 187
 188 static INLINE void
 189 emit_elt16(void* priv, unsigned start, unsigned vc)
 190 {
 191         struct push_context* ctx = priv;
 192         struct nouveau_grobj *eng3d = ctx->eng3d;
 193         struct nouveau_channel *chan = ctx->chan;
 194         uint16_t *elts = (uint16_t *)ctx->idxbuf + start;
 195         int idxbias = ctx->idxbias;
 196
 197         if (vc & 1) {
 198                 BEGIN_RING(chan, eng3d, NV30_3D_VB_ELEMENT_U32, 1);
 199                 OUT_RING  (chan, elts[0]);
 200                 elts++; vc--;
 201         }
 202
 203         while (vc) {
 204                 unsigned i;
 205                 unsigned push = MIN2(vc, 2047 * 2);
 206
 207                 BEGIN_RING_NI(chan, eng3d, NV30_3D_VB_ELEMENT_U16, push >> 1);
 208                 for (i = 0; i < push; i+=2)
 209                         OUT_RING(chan, ((elts[i+1] + idxbias) << 16) | (elts[i] + idxbias));
 210
 211                 vc -= push;
 212                 elts += push;
 213         }
 214 }
 215
 216 static INLINE void
 217 emit_elt32(void* priv, unsigned start, unsigned vc)
 218 {
 219         struct push_context* ctx = priv;
 220         struct nouveau_grobj *eng3d = ctx->eng3d;
 221         struct nouveau_channel *chan = ctx->chan;
 222         uint32_t *elts = (uint32_t *)ctx->idxbuf + start;
 223         int idxbias = ctx->idxbias;
 224
 225         while (vc) {
 226                 unsigned push = MIN2(vc, 2047);
 227
 228                 BEGIN_RING_NI(chan, eng3d, NV30_3D_VB_ELEMENT_U32, push);
 229                 if(idxbias)
 230                 {
 231                         for(unsigned i = 0; i < push; ++i)
 232                                 OUT_RING(chan, elts[i] + idxbias);
 233                 }
 234                 else
 235                         OUT_RINGp(chan, elts, push);
 236
 237                 vc -= push;
 238                 elts += push;
 239         }
 240 }
 241
 242 void
 243 nvfx_push_vbo(struct pipe_context *pipe, const struct pipe_draw_info *info)
 244 {
 245         struct nvfx_context *nvfx = nvfx_context(pipe);
 246         struct nouveau_channel *chan = nvfx->screen->base.channel;
 247         struct nouveau_grobj *eng3d = nvfx->screen->eng3d;
 248         struct push_context ctx;
 249         struct util_split_prim s;
 250         unsigned instances_left = info->instance_count;
 251         int vtx_value;
 252         unsigned hw_mode = nvgl_primitive(info->mode);
 253         int i;
 254         struct
 255         {
 256                 uint8_t* map;
 257                 unsigned step;
 258         } per_instance[16];
 259         unsigned p_overhead = 64 /* magic fix */
 260                         + 4 /* begin/end */
 261                         + 4; /* potential edgeflag enable/disable */
 262
 263         ctx.chan = nvfx->screen->base.channel;
 264         ctx.eng3d = nvfx->screen->eng3d;
 265         ctx.translate = nvfx->vtxelt->translate;
 266         ctx.idxbuf = NULL;
 267         ctx.vertex_length = nvfx->vtxelt->vertex_length;
 268         ctx.max_vertices_per_packet = nvfx->vtxelt->max_vertices_per_packet;
 269         ctx.edgeflag = 0.5f;
 270         // TODO: figure out if we really want to handle this, and do so in that case
 271         ctx.edgeflag_attr = 0xff; // nvfx->vertprog->cfg.edgeflag_in;
 272
 273         if(!nvfx->use_vertex_buffers)
 274         {
 275                 for(i = 0; i < nvfx->vtxelt->num_per_vertex_buffer_infos; ++i)
 276                 {
 277                         struct nvfx_per_vertex_buffer_info* vbi = &nvfx->vtxelt->per_vertex_buffer_info[i];
 278                         struct pipe_vertex_buffer *vb = &nvfx->vtxbuf[vbi->vertex_buffer_index];
 279                         uint8_t* data = nvfx_buffer(vb->buffer)->data + vb->buffer_offset;
 280                         if(info->indexed)
 281                                 data += info->index_bias * vb->stride;
 282                         ctx.translate->set_buffer(ctx.translate, i, data, vb->stride, ~0);
 283                 }
 284
 285                 if(ctx.edgeflag_attr < 16)
 286                         vtx_value = -(ctx.vertex_length + 3);  /* vertex data and edgeflag header and value */
 287                 else
 288                 {
 289                         p_overhead += 1; /* initial vertex_data header */
 290                         vtx_value = -ctx.vertex_length;  /* vertex data and edgeflag header and value */
 291                 }
 292
 293                 if (info->indexed) {
 294                         // XXX: this case and is broken and probably need a new VTX_ATTR push path
 295                         if (nvfx->idxbuf.index_size == 1)
 296                                 s.emit = emit_vertices_lookup8;
 297                         else if (nvfx->idxbuf.index_size == 2)
 298                                 s.emit = emit_vertices_lookup16;
 299                         else
 300                                 s.emit = emit_vertices_lookup32;
 301                 } else
 302                         s.emit = emit_vertices;
 303         }
 304         else
 305         {
 306                 if(!info->indexed || nvfx->use_index_buffer)
 307                 {
 308                         s.emit = info->indexed ? emit_ib_ranges : emit_vb_ranges;
 309                         p_overhead += 3;
 310                         vtx_value = 0;
 311                 }
 312                 else if (nvfx->idxbuf.index_size == 4)
 313                 {
 314                         s.emit = emit_elt32;
 315                         p_overhead += 1;
 316                         vtx_value = 8;
 317                 }
 318                 else
 319                 {
 320                         s.emit = (nvfx->idxbuf.index_size == 2) ? emit_elt16 : emit_elt8;
 321                         p_overhead += 3;
 322                         vtx_value = 7;
 323                 }
 324         }
 325
 326         ctx.idxbias = info->index_bias;
 327         if(nvfx->use_vertex_buffers)
 328                 ctx.idxbias -= nvfx->base_vertex;
 329
 330         /* map index buffer, if present */
 331         if (info->indexed && !nvfx->use_index_buffer)
 332                 ctx.idxbuf = nvfx_buffer(nvfx->idxbuf.buffer)->data + nvfx->idxbuf.offset;
 333
 334         s.priv = &ctx;
 335         s.edge = emit_edgeflag;
 336
 337         for (i = 0; i < nvfx->vtxelt->num_per_instance; ++i)
 338         {
 339                 struct nvfx_per_instance_element *ve = &nvfx->vtxelt->per_instance[i];
 340                 struct pipe_vertex_buffer *vb = &nvfx->vtxbuf[ve->base.vertex_buffer_index];
 341                 float v[4];
 342                 per_instance[i].step = info->start_instance % ve->instance_divisor;
 343                 per_instance[i].map = nvfx_buffer(vb->buffer)->data + vb->buffer_offset + ve->base.src_offset;
 344
 345                 nvfx->vtxelt->per_instance[i].base.fetch_rgba_float(v, per_instance[i].map, 0, 0);
 346
 347                 nvfx_emit_vtx_attr(chan, eng3d,
 348                                    nvfx->vtxelt->per_instance[i].base.idx, v,
 349                                    nvfx->vtxelt->per_instance[i].base.ncomp);
 350         }
 351
 352         /* per-instance loop */
 353         while (instances_left--) {
 354                 int max_verts;
 355                 boolean done;
 356
 357                 util_split_prim_init(&s, info->mode, info->start, info->count);
 358                 nvfx_state_emit(nvfx);
 359                 for(;;) {
 360                         max_verts  = AVAIL_RING(chan);
 361                         max_verts -= p_overhead;
 362
 363                         /* if vtx_value < 0, each vertex is -vtx_value words long
 364                          * otherwise, each vertex is 2^(vtx_value) / 255 words long (this is an approximation)
 365                          */
 366                         if(vtx_value < 0)
 367                         {
 368                                 max_verts /= -vtx_value;
 369                                 max_verts -= (max_verts >> 10); /* vertex data headers */
 370                         }
 371                         else
 372                         {
 373                                 if(max_verts >= (1 << 23)) /* avoid overflow here */
 374                                         max_verts = (1 << 23);
 375                                 max_verts = (max_verts * 255) >> vtx_value;
 376                         }
 377
 378                         //printf("avail %u max_verts %u\n", AVAIL_RING(chan), max_verts);
 379
 380                         if(max_verts >= 16)
 381                         {
 382                                 /* XXX: any command a lot of times seems to (mostly) fix corruption that would otherwise happen */
 383                                 /* this seems to cause issues on nv3x, and also be unneeded there */
 384                                 if(nvfx->is_nv4x)
 385                                 {
 386                                         int i;
 387                                         for(i = 0; i < 32; ++i)
 388                                         {
 389                                                 BEGIN_RING(chan, eng3d,
 390                                                            0x1dac, 1);
 391                                                 OUT_RING(chan, 0);
 392                                         }
 393                                 }
 394
 395                                 BEGIN_RING(chan, eng3d,
 396                                            NV30_3D_VERTEX_BEGIN_END, 1);
 397                                 OUT_RING(chan, hw_mode);
 398                                 done = util_split_prim_next(&s, max_verts);
 399                                 BEGIN_RING(chan, eng3d,
 400                                            NV30_3D_VERTEX_BEGIN_END, 1);
 401                                 OUT_RING(chan, 0);
 402
 403                                 if(done)
 404                                         break;
 405                         }
 406
 407                         FIRE_RING(chan);
 408                         nvfx_state_emit(nvfx);
 409                 }
 410
 411                 /* set data for the next instance, if any changed */
 412                 for (i = 0; i < nvfx->vtxelt->num_per_instance; ++i)
 413                 {
 414                         struct nvfx_per_instance_element *ve = &nvfx->vtxelt->per_instance[i];
 415                         struct pipe_vertex_buffer *vb = &nvfx->vtxbuf[ve->base.vertex_buffer_index];
 416
 417                         if(++per_instance[i].step == ve->instance_divisor)
 418                         {
 419                                 float v[4];
 420                                 per_instance[i].map += vb->stride;
 421                                 per_instance[i].step = 0;
 422
 423                                 nvfx->vtxelt->per_instance[i].base.fetch_rgba_float(v, per_instance[i].map, 0, 0);
 424                                 nvfx_emit_vtx_attr(chan, eng3d,
 425                                                    nvfx->vtxelt->per_instance[i].base.idx,
 426                                                    v,
 427                                                    nvfx->vtxelt->per_instance[i].base.ncomp);
 428                         }
 429                 }
 430         }
 431 }