src/gallium/drivers/svga/svga_pipe_draw.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 "svga_cmd.h"
  27
  28 #include "util/u_format.h"
  29 #include "util/u_inlines.h"
  30 #include "util/u_prim.h"
  31 #include "util/u_time.h"
  32 #include "indices/u_indices.h"
  33
  34 #include "svga_hw_reg.h"
  35 #include "svga_context.h"
  36 #include "svga_screen.h"
  37 #include "svga_draw.h"
  38 #include "svga_state.h"
  39 #include "svga_swtnl.h"
  40 #include "svga_debug.h"
  41 #include "svga_resource_buffer.h"
  42 #include "util/u_upload_mgr.h"
  43
  44 /**
  45  * Determine the ranges to upload for the user-buffers referenced
  46  * by the next draw command.
  47  *
  48  * TODO: It might be beneficial to support multiple ranges. In that case,
  49  * the struct svga_buffer::uploaded member should be made an array or a
  50  * list, since we need to account for the possibility that different ranges
  51  * may be uploaded to different hardware buffers chosen by the utility
  52  * upload manager.
  53  */
  54
  55 static void
  56 svga_user_buffer_range(struct svga_context *svga,
  57                        unsigned start,
  58                        unsigned count,
  59                        unsigned instance_count)
  60 {
  61    const struct pipe_vertex_element *ve = svga->curr.velems->velem;
  62    int i;
  63
  64    /*
  65     * Release old uploaded range (if not done already) and
  66     * initialize new ranges.
  67     */
  68
  69    for (i=0; i < svga->curr.velems->count; i++) {
  70       struct pipe_vertex_buffer *vb =
  71          &svga->curr.vb[ve[i].vertex_buffer_index];
  72
  73       if (vb->buffer && svga_buffer_is_user_buffer(vb->buffer)) {
  74          struct svga_buffer *buffer = svga_buffer(vb->buffer);
  75
  76          pipe_resource_reference(&buffer->uploaded.buffer, NULL);
  77          buffer->uploaded.start = ~0;
  78          buffer->uploaded.end = 0;
  79       }
  80    }
  81
  82    for (i=0; i < svga->curr.velems->count; i++) {
  83       struct pipe_vertex_buffer *vb =
  84          &svga->curr.vb[ve[i].vertex_buffer_index];
  85
  86       if (vb->buffer && svga_buffer_is_user_buffer(vb->buffer)) {
  87          struct svga_buffer *buffer = svga_buffer(vb->buffer);
  88          unsigned first, size;
  89          unsigned instance_div = ve[i].instance_divisor;
  90          unsigned elemSize = util_format_get_blocksize(ve->src_format);
  91
  92          svga->dirty |= SVGA_NEW_VBUFFER;
  93
  94          if (instance_div) {
  95             first = ve[i].src_offset;
  96             count = (instance_count + instance_div - 1) / instance_div;
  97             size = vb->stride * (count - 1) + elemSize;
  98          } else if (vb->stride) {
  99             first = vb->stride * start + ve[i].src_offset;
 100             size = vb->stride * (count - 1) + elemSize;
 101          } else {
 102             /* Only a single vertex!
 103              * Upload with the largest vertex size the hw supports,
 104              * if possible.
 105              */
 106             first = ve[i].src_offset;
 107             size = MIN2(16, vb->buffer->width0);
 108          }
 109
 110          buffer->uploaded.start = MIN2(buffer->uploaded.start, first);
 111          buffer->uploaded.end = MAX2(buffer->uploaded.end, first + size);
 112       }
 113    }
 114 }
 115
 116 /**
 117  * svga_upload_user_buffers - upload parts of user buffers
 118  *
 119  * This function streams a part of a user buffer to hw and fills
 120  * svga_buffer::uploaded with information on the upload.
 121  */
 122
 123 static int
 124 svga_upload_user_buffers(struct svga_context *svga,
 125                          unsigned start,
 126                          unsigned count,
 127                          unsigned instance_count)
 128 {
 129    const struct pipe_vertex_element *ve = svga->curr.velems->velem;
 130    unsigned i;
 131    int ret;
 132
 133    svga_user_buffer_range(svga, start, count, instance_count);
 134
 135    for (i=0; i < svga->curr.velems->count; i++) {
 136       struct pipe_vertex_buffer *vb =
 137          &svga->curr.vb[ve[i].vertex_buffer_index];
 138
 139       if (vb->buffer && svga_buffer_is_user_buffer(vb->buffer)) {
 140          struct svga_buffer *buffer = svga_buffer(vb->buffer);
 141          boolean flushed;
 142
 143          /*
 144           * Check if already uploaded. Otherwise go ahead and upload.
 145           */
 146
 147          if (buffer->uploaded.buffer)
 148             continue;
 149
 150          ret = u_upload_buffer( svga->upload_vb,
 151                                 0,
 152                                 buffer->uploaded.start,
 153                                 buffer->uploaded.end - buffer->uploaded.start,
 154                                 &buffer->b.b,
 155                                 &buffer->uploaded.offset,
 156                                 &buffer->uploaded.buffer,
 157                                 &flushed);
 158
 159          if (ret)
 160             return ret;
 161
 162          if (0)
 163             debug_printf("%s: %d: orig buf %p upl buf %p ofs %d sofs %d"
 164                          " sz %d\n",
 165                          __FUNCTION__,
 166                          i,
 167                          buffer,
 168                          buffer->uploaded.buffer,
 169                          buffer->uploaded.offset,
 170                          buffer->uploaded.start,
 171                          buffer->uploaded.end - buffer->uploaded.start);
 172
 173          vb->buffer_offset = buffer->uploaded.offset;
 174       }
 175    }
 176
 177    return PIPE_OK;
 178 }
 179
 180 /**
 181  * svga_release_user_upl_buffers - release uploaded parts of user buffers
 182  *
 183  * This function releases the hw copy of the uploaded fraction of the
 184  * user-buffer. It's important to do this as soon as all draw calls
 185  * affecting the uploaded fraction are issued, as this allows for
 186  * efficient reuse of the hardware surface backing the uploaded fraction.
 187  *
 188  * svga_buffer::source_offset is set to 0, and svga_buffer::uploaded::buffer
 189  * is set to 0.
 190  */
 191
 192 static void
 193 svga_release_user_upl_buffers(struct svga_context *svga)
 194 {
 195    unsigned i;
 196    unsigned nr;
 197
 198    nr = svga->curr.num_vertex_buffers;
 199
 200    for (i = 0; i < nr; ++i) {
 201       struct pipe_vertex_buffer *vb = &svga->curr.vb[i];
 202
 203       if (vb->buffer && svga_buffer_is_user_buffer(vb->buffer)) {
 204          struct svga_buffer *buffer = svga_buffer(vb->buffer);
 205
 206          buffer->uploaded.start = ~0;
 207          buffer->uploaded.end = 0;
 208          if (buffer->uploaded.buffer)
 209             pipe_resource_reference(&buffer->uploaded.buffer, NULL);
 210       }
 211    }
 212 }
 213
 214
 215
 216 static enum pipe_error
 217 retry_draw_range_elements( struct svga_context *svga,
 218                            struct pipe_resource *index_buffer,
 219                            unsigned index_size,
 220                            int index_bias,
 221                            unsigned min_index,
 222                            unsigned max_index,
 223                            unsigned prim,
 224                            unsigned start,
 225                            unsigned count,
 226                            unsigned instance_count,
 227                            boolean do_retry )
 228 {
 229    enum pipe_error ret = 0;
 230
 231    svga_hwtnl_set_unfilled( svga->hwtnl,
 232                             svga->curr.rast->hw_unfilled );
 233
 234    svga_hwtnl_set_flatshade( svga->hwtnl,
 235                              svga->curr.rast->templ.flatshade,
 236                              svga->curr.rast->templ.flatshade_first );
 237
 238    ret = svga_upload_user_buffers( svga, min_index + index_bias,
 239                                    max_index - min_index + 1, instance_count );
 240    if (ret != PIPE_OK)
 241       goto retry;
 242
 243    ret = svga_update_state( svga, SVGA_STATE_HW_DRAW );
 244    if (ret)
 245       goto retry;
 246
 247    ret = svga_hwtnl_draw_range_elements( svga->hwtnl,
 248                                          index_buffer, index_size, index_bias,
 249                                          min_index, max_index,
 250                                          prim, start, count );
 251    if (ret)
 252       goto retry;
 253
 254    return PIPE_OK;
 255
 256 retry:
 257    svga_context_flush( svga, NULL );
 258
 259    if (do_retry)
 260    {
 261       return retry_draw_range_elements( svga,
 262                                         index_buffer, index_size, index_bias,
 263                                         min_index, max_index,
 264                                         prim, start, count,
 265                                         instance_count, FALSE );
 266    }
 267
 268    return ret;
 269 }
 270
 271
 272 static enum pipe_error
 273 retry_draw_arrays( struct svga_context *svga,
 274                    unsigned prim,
 275                    unsigned start,
 276                    unsigned count,
 277                    unsigned instance_count,
 278                    boolean do_retry )
 279 {
 280    enum pipe_error ret;
 281
 282    svga_hwtnl_set_unfilled( svga->hwtnl,
 283                             svga->curr.rast->hw_unfilled );
 284
 285    svga_hwtnl_set_flatshade( svga->hwtnl,
 286                              svga->curr.rast->templ.flatshade,
 287                              svga->curr.rast->templ.flatshade_first );
 288
 289    ret = svga_upload_user_buffers( svga, start, count, instance_count );
 290
 291    if (ret != PIPE_OK)
 292       goto retry;
 293
 294    ret = svga_update_state( svga, SVGA_STATE_HW_DRAW );
 295    if (ret)
 296       goto retry;
 297
 298    ret = svga_hwtnl_draw_arrays( svga->hwtnl, prim,
 299                                  start, count );
 300    if (ret)
 301       goto retry;
 302
 303    return 0;
 304
 305 retry:
 306    if (ret == PIPE_ERROR_OUT_OF_MEMORY && do_retry)
 307    {
 308       svga_context_flush( svga, NULL );
 309
 310       return retry_draw_arrays( svga,
 311                                 prim,
 312                                 start,
 313                                 count,
 314                                 instance_count,
 315                                 FALSE );
 316    }
 317
 318    return ret;
 319 }
 320
 321
 322 static void
 323 svga_draw_vbo(struct pipe_context *pipe, const struct pipe_draw_info *info)
 324 {
 325    struct svga_context *svga = svga_context( pipe );
 326    unsigned reduced_prim = u_reduced_prim( info->mode );
 327    unsigned count = info->count;
 328    enum pipe_error ret = 0;
 329    boolean needed_swtnl;
 330
 331    if (!u_trim_pipe_prim( info->mode, &count ))
 332       return;
 333
 334    /*
 335     * Mark currently bound target surfaces as dirty
 336     * doesn't really matter if it is done before drawing.
 337     *
 338     * TODO If we ever normaly return something other then
 339     * true we should not mark it as dirty then.
 340     */
 341    svga_mark_surfaces_dirty(svga_context(pipe));
 342
 343    if (svga->curr.reduced_prim != reduced_prim) {
 344       svga->curr.reduced_prim = reduced_prim;
 345       svga->dirty |= SVGA_NEW_REDUCED_PRIMITIVE;
 346    }
 347
 348    needed_swtnl = svga->state.sw.need_swtnl;
 349
 350    svga_update_state_retry( svga, SVGA_STATE_NEED_SWTNL );
 351
 352 #ifdef DEBUG
 353    if (svga->curr.vs->base.id == svga->debug.disable_shader ||
 354        svga->curr.fs->base.id == svga->debug.disable_shader)
 355       return;
 356 #endif
 357
 358    if (svga->state.sw.need_swtnl) {
 359       if (!needed_swtnl) {
 360          /*
 361           * We're switching from HW to SW TNL.  SW TNL will require mapping all
 362           * currently bound vertex buffers, some of which may already be
 363           * referenced in the current command buffer as result of previous HW
 364           * TNL. So flush now, to prevent the context to flush while a referred
 365           * vertex buffer is mapped.
 366           */
 367
 368          svga_context_flush(svga, NULL);
 369       }
 370
 371       /* Avoid leaking the previous hwtnl bias to swtnl */
 372       svga_hwtnl_set_index_bias( svga->hwtnl, 0 );
 373       ret = svga_swtnl_draw_vbo( svga, info );
 374    }
 375    else {
 376       if (info->indexed && svga->curr.ib.buffer) {
 377          unsigned offset;
 378
 379          assert(svga->curr.ib.offset % svga->curr.ib.index_size == 0);
 380          offset = svga->curr.ib.offset / svga->curr.ib.index_size;
 381
 382          ret = retry_draw_range_elements( svga,
 383                                           svga->curr.ib.buffer,
 384                                           svga->curr.ib.index_size,
 385                                           info->index_bias,
 386                                           info->min_index,
 387                                           info->max_index,
 388                                           info->mode,
 389                                           info->start + offset,
 390                                           info->count,
 391                                           info->instance_count,
 392                                           TRUE );
 393       }
 394       else {
 395          ret = retry_draw_arrays( svga,
 396                                   info->mode,
 397                                   info->start,
 398                                   info->count,
 399                                   info->instance_count,
 400                                   TRUE );
 401       }
 402    }
 403
 404    svga_release_user_upl_buffers( svga );
 405
 406    if (SVGA_DEBUG & DEBUG_FLUSH) {
 407       svga_hwtnl_flush_retry( svga );
 408       svga_context_flush(svga, NULL);
 409    }
 410 }
 411
 412
 413 void svga_init_draw_functions( struct svga_context *svga )
 414 {
 415    svga->pipe.draw_vbo = svga_draw_vbo;
 416 }