src/gallium/drivers/svga/svga_swtnl_backend.c

   1 /**********************************************************
   2  * Copyright 2008-2009 VMware, Inc.  All rights reserved.
   3  *
   4  * Permission is hereby granted, free of charge, to any person
   5  * obtaining a copy of this software and associated documentation
   6  * files (the "Software"), to deal in the Software without
   7  * restriction, including without limitation the rights to use, copy,
   8  * modify, merge, publish, distribute, sublicense, and/or sell copies
   9  * of the Software, and to permit persons to whom the Software is
  10  * furnished to do so, subject to the following conditions:
  11  *
  12  * The above copyright notice and this permission notice shall be
  13  * included in all copies or substantial portions of the Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  16  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  17  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  18  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  19  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  20  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  21  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  22  * SOFTWARE.
  23  *
  24  **********************************************************/
  25
  26 #include "draw/draw_vbuf.h"
  27 #include "draw/draw_context.h"
  28 #include "draw/draw_vertex.h"
  29
  30 #include "util/u_debug.h"
  31 #include "util/u_inlines.h"
  32 #include "util/u_math.h"
  33 #include "util/u_memory.h"
  34
  35 #include "svga_context.h"
  36 #include "svga_state.h"
  37 #include "svga_swtnl.h"
  38
  39 #include "svga_types.h"
  40 #include "svga_reg.h"
  41 #include "svga3d_reg.h"
  42 #include "svga_draw.h"
  43 #include "svga_shader.h"
  44 #include "svga_swtnl_private.h"
  45
  46
  47 static const struct vertex_info *
  48 svga_vbuf_render_get_vertex_info(struct vbuf_render *render)
  49 {
  50    struct svga_vbuf_render *svga_render = svga_vbuf_render(render);
  51    struct svga_context *svga = svga_render->svga;
  52
  53    svga_swtnl_update_vdecl(svga);
  54
  55    return &svga_render->vertex_info;
  56 }
  57
  58
  59 static boolean
  60 svga_vbuf_render_allocate_vertices(struct vbuf_render *render,
  61                                    ushort vertex_size,
  62                                    ushort nr_vertices)
  63 {
  64    struct svga_vbuf_render *svga_render = svga_vbuf_render(render);
  65    struct svga_context *svga = svga_render->svga;
  66    struct pipe_screen *screen = svga->pipe.screen;
  67    size_t size = (size_t)nr_vertices * (size_t)vertex_size;
  68    boolean new_vbuf = FALSE;
  69    boolean new_ibuf = FALSE;
  70
  71    SVGA_STATS_TIME_PUSH(svga_sws(svga),
  72                         SVGA_STATS_TIME_VBUFRENDERALLOCVERT);
  73
  74    if (svga_render->vertex_size != vertex_size)
  75       svga->swtnl.new_vdecl = TRUE;
  76    svga_render->vertex_size = (size_t)vertex_size;
  77
  78    if (svga->swtnl.new_vbuf)
  79       new_ibuf = new_vbuf = TRUE;
  80    svga->swtnl.new_vbuf = FALSE;
  81
  82    if (svga_render->vbuf_size
  83        < svga_render->vbuf_offset + svga_render->vbuf_used + size)
  84       new_vbuf = TRUE;
  85
  86    if (new_vbuf)
  87       pipe_resource_reference(&svga_render->vbuf, NULL);
  88    if (new_ibuf)
  89       pipe_resource_reference(&svga_render->ibuf, NULL);
  90
  91    if (!svga_render->vbuf) {
  92       svga_render->vbuf_size = MAX2(size, svga_render->vbuf_alloc_size);
  93       svga_render->vbuf = SVGA_TRY_PTR(pipe_buffer_create
  94                                        (screen, PIPE_BIND_VERTEX_BUFFER,
  95                                         PIPE_USAGE_STREAM,
  96                                         svga_render->vbuf_size));
  97       if (!svga_render->vbuf) {
  98          svga_retry_enter(svga);
  99          svga_context_flush(svga, NULL);
 100          assert(!svga_render->vbuf);
 101          svga_render->vbuf = pipe_buffer_create(screen,
 102                                                 PIPE_BIND_VERTEX_BUFFER,
 103                                                 PIPE_USAGE_STREAM,
 104                                                 svga_render->vbuf_size);
 105          /* The buffer allocation may fail if we run out of memory.
 106           * The draw module's vbuf code should handle that without crashing.
 107           */
 108          svga_retry_exit(svga);
 109       }
 110
 111       svga->swtnl.new_vdecl = TRUE;
 112       svga_render->vbuf_offset = 0;
 113    } else {
 114       svga_render->vbuf_offset += svga_render->vbuf_used;
 115    }
 116
 117    svga_render->vbuf_used = 0;
 118
 119    if (svga->swtnl.new_vdecl)
 120       svga_render->vdecl_offset = svga_render->vbuf_offset;
 121
 122    SVGA_STATS_TIME_POP(svga_sws(svga));
 123
 124    return TRUE;
 125 }
 126
 127
 128 static void *
 129 svga_vbuf_render_map_vertices(struct vbuf_render *render)
 130 {
 131    struct svga_vbuf_render *svga_render = svga_vbuf_render(render);
 132    struct svga_context *svga = svga_render->svga;
 133    void * retPtr = NULL;
 134
 135    SVGA_STATS_TIME_PUSH(svga_sws(svga),
 136                         SVGA_STATS_TIME_VBUFRENDERMAPVERT);
 137
 138    if (svga_render->vbuf) {
 139       char *ptr = (char*)pipe_buffer_map(&svga->pipe,
 140                                          svga_render->vbuf,
 141                                          PIPE_TRANSFER_WRITE |
 142                                          PIPE_TRANSFER_FLUSH_EXPLICIT |
 143                                          PIPE_TRANSFER_DISCARD_RANGE |
 144                                          PIPE_TRANSFER_UNSYNCHRONIZED,
 145                                          &svga_render->vbuf_transfer);
 146       if (ptr) {
 147          svga_render->vbuf_ptr = ptr;
 148          retPtr = ptr + svga_render->vbuf_offset;
 149       }
 150       else {
 151          svga_render->vbuf_ptr = NULL;
 152          svga_render->vbuf_transfer = NULL;
 153          retPtr = NULL;
 154       }
 155    }
 156    else {
 157       /* we probably ran out of memory when allocating the vertex buffer */
 158       retPtr = NULL;
 159    }
 160
 161    SVGA_STATS_TIME_POP(svga_sws(svga));
 162    return retPtr;
 163 }
 164
 165
 166 static void
 167 svga_vbuf_render_unmap_vertices(struct vbuf_render *render,
 168                                 ushort min_index,
 169                                 ushort max_index)
 170 {
 171    struct svga_vbuf_render *svga_render = svga_vbuf_render(render);
 172    struct svga_context *svga = svga_render->svga;
 173    unsigned offset, length;
 174    size_t used = svga_render->vertex_size * ((size_t)max_index + 1);
 175
 176    SVGA_STATS_TIME_PUSH(svga_sws(svga),
 177                         SVGA_STATS_TIME_VBUFRENDERUNMAPVERT);
 178
 179    offset = svga_render->vbuf_offset + svga_render->vertex_size * min_index;
 180    length = svga_render->vertex_size * (max_index + 1 - min_index);
 181
 182    if (0) {
 183       /* dump vertex data */
 184       const float *f = (const float *) ((char *) svga_render->vbuf_ptr +
 185                                         svga_render->vbuf_offset);
 186       unsigned i;
 187       debug_printf("swtnl vertex data:\n");
 188       for (i = 0; i < length / 4; i += 4) {
 189          debug_printf("%u: %f %f %f %f\n", i, f[i], f[i+1], f[i+2], f[i+3]);
 190       }
 191    }
 192
 193    pipe_buffer_flush_mapped_range(&svga->pipe,
 194                                   svga_render->vbuf_transfer,
 195                                   offset, length);
 196    pipe_buffer_unmap(&svga->pipe, svga_render->vbuf_transfer);
 197    svga_render->min_index = min_index;
 198    svga_render->max_index = max_index;
 199    svga_render->vbuf_used = MAX2(svga_render->vbuf_used, used);
 200
 201    SVGA_STATS_TIME_POP(svga_sws(svga));
 202 }
 203
 204
 205 static void
 206 svga_vbuf_render_set_primitive(struct vbuf_render *render,
 207                                enum pipe_prim_type prim)
 208 {
 209    struct svga_vbuf_render *svga_render = svga_vbuf_render(render);
 210    svga_render->prim = prim;
 211 }
 212
 213
 214 static void
 215 svga_vbuf_submit_state(struct svga_vbuf_render *svga_render)
 216 {
 217    struct svga_context *svga = svga_render->svga;
 218    SVGA3dVertexDecl vdecl[PIPE_MAX_ATTRIBS];
 219    unsigned i;
 220    static const unsigned zero[PIPE_MAX_ATTRIBS] = {0};
 221    boolean retried;
 222
 223    /* if the vdecl or vbuf hasn't changed do nothing */
 224    if (!svga->swtnl.new_vdecl)
 225       return;
 226
 227    SVGA_STATS_TIME_PUSH(svga_sws(svga),
 228                         SVGA_STATS_TIME_VBUFSUBMITSTATE);
 229
 230    memcpy(vdecl, svga_render->vdecl, sizeof(vdecl));
 231
 232    /* flush the hw state */
 233    SVGA_RETRY_CHECK(svga, svga_hwtnl_flush(svga->hwtnl), retried);
 234    if (retried) {
 235       /* if we hit this path we might become synced with hw */
 236       svga->swtnl.new_vbuf = TRUE;
 237    }
 238
 239    for (i = 0; i < svga_render->vdecl_count; i++) {
 240       vdecl[i].array.offset += svga_render->vdecl_offset;
 241    }
 242
 243    svga_hwtnl_vertex_decls(svga->hwtnl,
 244                            svga_render->vdecl_count,
 245                            vdecl,
 246                            zero,
 247                            svga_render->layout_id);
 248
 249    /* Specify the vertex buffer (there's only ever one) */
 250    {
 251       struct pipe_vertex_buffer vb;
 252       vb.is_user_buffer = false;
 253       vb.buffer.resource = svga_render->vbuf;
 254       vb.buffer_offset = svga_render->vdecl_offset;
 255       vb.stride = vdecl[0].array.stride;
 256       svga_hwtnl_vertex_buffers(svga->hwtnl, 1, &vb);
 257    }
 258
 259    /* We have already taken care of flatshading, so let the hwtnl
 260     * module use whatever is most convenient:
 261     */
 262    if (svga->state.sw.need_pipeline) {
 263       svga_hwtnl_set_flatshade(svga->hwtnl, FALSE, FALSE);
 264       svga_hwtnl_set_fillmode(svga->hwtnl, PIPE_POLYGON_MODE_FILL);
 265    }
 266    else {
 267       svga_hwtnl_set_flatshade(svga->hwtnl,
 268                                 svga->curr.rast->templ.flatshade ||
 269                                 svga_is_using_flat_shading(svga),
 270                                 svga->curr.rast->templ.flatshade_first);
 271
 272       svga_hwtnl_set_fillmode(svga->hwtnl, svga->curr.rast->hw_fillmode);
 273    }
 274
 275    svga->swtnl.new_vdecl = FALSE;
 276    SVGA_STATS_TIME_POP(svga_sws(svga));
 277 }
 278
 279
 280 static void
 281 svga_vbuf_render_draw_arrays(struct vbuf_render *render,
 282                               unsigned start, uint nr)
 283 {
 284    struct svga_vbuf_render *svga_render = svga_vbuf_render(render);
 285    struct svga_context *svga = svga_render->svga;
 286    unsigned bias = (svga_render->vbuf_offset - svga_render->vdecl_offset)
 287       / svga_render->vertex_size;
 288    /* instancing will already have been resolved at this point by 'draw' */
 289    const unsigned start_instance = 0;
 290    const unsigned instance_count = 1;
 291    boolean retried;
 292
 293    SVGA_STATS_TIME_PUSH(svga_sws(svga), SVGA_STATS_TIME_VBUFDRAWARRAYS);
 294
 295    /* off to hardware */
 296    svga_vbuf_submit_state(svga_render);
 297
 298    /* Need to call update_state() again as the draw module may have
 299     * altered some of our state behind our backs.  Testcase:
 300     * redbook/polys.c
 301     */
 302    svga_update_state_retry(svga, SVGA_STATE_HW_DRAW);
 303    SVGA_RETRY_CHECK(svga, svga_hwtnl_draw_arrays
 304                     (svga->hwtnl, svga_render->prim, start + bias,
 305                      nr, start_instance, instance_count, 0), retried);
 306    if (retried) {
 307       svga->swtnl.new_vbuf = TRUE;
 308    }
 309
 310    SVGA_STATS_TIME_POP(svga_sws(svga));
 311 }
 312
 313
 314 static void
 315 svga_vbuf_render_draw_elements(struct vbuf_render *render,
 316                                 const ushort *indices,
 317                                 uint nr_indices)
 318 {
 319    struct svga_vbuf_render *svga_render = svga_vbuf_render(render);
 320    struct svga_context *svga = svga_render->svga;
 321    int bias = (svga_render->vbuf_offset - svga_render->vdecl_offset)
 322       / svga_render->vertex_size;
 323    boolean retried;
 324    /* instancing will already have been resolved at this point by 'draw' */
 325    const struct pipe_draw_info info = {
 326       .index_size = 2,
 327       .mode = svga_render->prim,
 328       .has_user_indices = 1,
 329       .index.user = indices,
 330       .start_instance = 0,
 331       .instance_count = 1,
 332       .index_bias = bias,
 333       .min_index = svga_render->min_index,
 334       .max_index = svga_render->max_index,
 335       .start = 0,
 336       .count = nr_indices
 337    };
 338
 339    assert((svga_render->vbuf_offset - svga_render->vdecl_offset)
 340           % svga_render->vertex_size == 0);
 341
 342    SVGA_STATS_TIME_PUSH(svga_sws(svga), SVGA_STATS_TIME_VBUFDRAWELEMENTS);
 343
 344    /* off to hardware */
 345    svga_vbuf_submit_state(svga_render);
 346
 347    /* Need to call update_state() again as the draw module may have
 348     * altered some of our state behind our backs.  Testcase:
 349     * redbook/polys.c
 350     */
 351    svga_update_state_retry(svga, SVGA_STATE_HW_DRAW);
 352    SVGA_RETRY_CHECK(svga, svga_hwtnl_draw_range_elements(svga->hwtnl, &info,
 353                                                          nr_indices), retried);
 354    if (retried) {
 355       svga->swtnl.new_vbuf = TRUE;
 356    }
 357
 358    SVGA_STATS_TIME_POP(svga_sws(svga));
 359 }
 360
 361
 362 static void
 363 svga_vbuf_render_release_vertices(struct vbuf_render *render)
 364 {
 365
 366 }
 367
 368
 369 static void
 370 svga_vbuf_render_destroy(struct vbuf_render *render)
 371 {
 372    struct svga_vbuf_render *svga_render = svga_vbuf_render(render);
 373
 374    pipe_resource_reference(&svga_render->vbuf, NULL);
 375    pipe_resource_reference(&svga_render->ibuf, NULL);
 376    FREE(svga_render);
 377 }
 378
 379
 380 /**
 381  * Create a new primitive render.
 382  */
 383 struct vbuf_render *
 384 svga_vbuf_render_create(struct svga_context *svga)
 385 {
 386    struct svga_vbuf_render *svga_render = CALLOC_STRUCT(svga_vbuf_render);
 387
 388    svga_render->svga = svga;
 389    svga_render->ibuf_size = 0;
 390    svga_render->vbuf_size = 0;
 391    svga_render->ibuf_alloc_size = 4*1024;
 392    svga_render->vbuf_alloc_size = 64*1024;
 393    svga_render->layout_id = SVGA3D_INVALID_ID;
 394    svga_render->base.max_vertex_buffer_bytes = 64*1024/10;
 395    svga_render->base.max_indices = 65536;
 396    svga_render->base.get_vertex_info = svga_vbuf_render_get_vertex_info;
 397    svga_render->base.allocate_vertices = svga_vbuf_render_allocate_vertices;
 398    svga_render->base.map_vertices = svga_vbuf_render_map_vertices;
 399    svga_render->base.unmap_vertices = svga_vbuf_render_unmap_vertices;
 400    svga_render->base.set_primitive = svga_vbuf_render_set_primitive;
 401    svga_render->base.draw_elements = svga_vbuf_render_draw_elements;
 402    svga_render->base.draw_arrays = svga_vbuf_render_draw_arrays;
 403    svga_render->base.release_vertices = svga_vbuf_render_release_vertices;
 404    svga_render->base.destroy = svga_vbuf_render_destroy;
 405
 406    return &svga_render->base;
 407 }