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  * svga_upload_user_buffers - upload parts of user buffers
  46  *
  47  * This function streams a part of a user buffer to hw and sets
  48  * svga_buffer::source_offset to the first byte uploaded. After upload
  49  * also svga_buffer::uploaded::buffer is set to !NULL
  50  */
  51
  52 static int
  53 svga_upload_user_buffers(struct svga_context *svga,
  54                          unsigned start,
  55                          unsigned count,
  56                          unsigned instance_count)
  57 {
  58    const struct pipe_vertex_element *ve = svga->curr.velems->velem;
  59    unsigned i;
  60    int ret;
  61
  62    for (i=0; i < svga->curr.velems->count; i++) {
  63       struct pipe_vertex_buffer *vb =
  64          &svga->curr.vb[ve[i].vertex_buffer_index];
  65
  66       if (vb->buffer && svga_buffer_is_user_buffer(vb->buffer)) {
  67          struct svga_buffer *buffer = svga_buffer(vb->buffer);
  68          unsigned first, size;
  69          boolean flushed;
  70          unsigned instance_div = ve[i].instance_divisor;
  71          unsigned elemSize = util_format_get_blocksize(ve->src_format);
  72
  73          svga->dirty |= SVGA_NEW_VBUFFER;
  74
  75          if (instance_div) {
  76             first = 0;
  77             count = (instance_count + instance_div - 1) / instance_div;
  78             size = vb->stride * (count - 1) + elemSize;
  79          } else if (vb->stride) {
  80             first = vb->stride * start;
  81             size = vb->stride * (count - 1) + elemSize;
  82          } else {
  83             /* Only a single vertex!
  84              * Upload with the largest vertex size the hw supports,
  85              * if possible.
  86              */
  87             first = 0;
  88             size = MIN2(16, vb->buffer->width0);
  89          }
  90
  91          ret = u_upload_buffer( svga->upload_vb,
  92                                 0, first, size,
  93                                 &buffer->b.b,
  94                                 &buffer->uploaded.offset,
  95                                 &buffer->uploaded.buffer,
  96                                 &flushed);
  97
  98          if (ret)
  99             return ret;
 100
 101          if (0)
 102             debug_printf("%s: %d: orig buf %p upl buf %p ofs %d sofs %d"
 103                          " sz %d\n",
 104                          __FUNCTION__,
 105                          i,
 106                          buffer,
 107                          buffer->uploaded.buffer,
 108                          buffer->uploaded.offset,
 109                          first,
 110                          size);
 111
 112          vb->buffer_offset = buffer->uploaded.offset;
 113          buffer->source_offset = first;
 114       }
 115    }
 116
 117    return PIPE_OK;
 118 }
 119
 120 /**
 121  * svga_release_user_upl_buffers - release uploaded parts of user buffers
 122  *
 123  * This function releases the hw copy of the uploaded fraction of the
 124  * user-buffer. It's important to do this as soon as all draw calls
 125  * affecting the uploaded fraction are issued, as this allows for
 126  * efficient reuse of the hardware surface backing the uploaded fraction.
 127  *
 128  * svga_buffer::source_offset is set to 0, and svga_buffer::uploaded::buffer
 129  * is set to 0.
 130  */
 131
 132 static void
 133 svga_release_user_upl_buffers(struct svga_context *svga)
 134 {
 135    unsigned i;
 136    unsigned nr;
 137
 138    nr = svga->curr.num_vertex_buffers;
 139
 140    for (i = 0; i < nr; ++i) {
 141       struct pipe_vertex_buffer *vb = &svga->curr.vb[i];
 142
 143       if (vb->buffer && svga_buffer_is_user_buffer(vb->buffer)) {
 144          struct svga_buffer *buffer = svga_buffer(vb->buffer);
 145
 146          buffer->source_offset = 0;
 147          if (buffer->uploaded.buffer)
 148             pipe_resource_reference(&buffer->uploaded.buffer, NULL);
 149       }
 150    }
 151 }
 152
 153
 154
 155 static enum pipe_error
 156 retry_draw_range_elements( struct svga_context *svga,
 157                            struct pipe_resource *index_buffer,
 158                            unsigned index_size,
 159                            int index_bias,
 160                            unsigned min_index,
 161                            unsigned max_index,
 162                            unsigned prim,
 163                            unsigned start,
 164                            unsigned count,
 165                            unsigned instance_count,
 166                            boolean do_retry )
 167 {
 168    enum pipe_error ret = 0;
 169
 170    svga_hwtnl_set_unfilled( svga->hwtnl,
 171                             svga->curr.rast->hw_unfilled );
 172
 173    svga_hwtnl_set_flatshade( svga->hwtnl,
 174                              svga->curr.rast->templ.flatshade,
 175                              svga->curr.rast->templ.flatshade_first );
 176
 177    ret = svga_upload_user_buffers( svga, min_index + index_bias,
 178                                    max_index - min_index + 1, instance_count );
 179    if (ret != PIPE_OK)
 180       goto retry;
 181
 182    ret = svga_update_state( svga, SVGA_STATE_HW_DRAW );
 183    if (ret)
 184       goto retry;
 185
 186    ret = svga_hwtnl_draw_range_elements( svga->hwtnl,
 187                                          index_buffer, index_size, index_bias,
 188                                          min_index, max_index,
 189                                          prim, start, count );
 190    if (ret)
 191       goto retry;
 192
 193    return PIPE_OK;
 194
 195 retry:
 196    svga_context_flush( svga, NULL );
 197
 198    if (do_retry)
 199    {
 200       return retry_draw_range_elements( svga,
 201                                         index_buffer, index_size, index_bias,
 202                                         min_index, max_index,
 203                                         prim, start, count,
 204                                         instance_count, FALSE );
 205    }
 206
 207    return ret;
 208 }
 209
 210
 211 static enum pipe_error
 212 retry_draw_arrays( struct svga_context *svga,
 213                    unsigned prim,
 214                    unsigned start,
 215                    unsigned count,
 216                    unsigned instance_count,
 217                    boolean do_retry )
 218 {
 219    enum pipe_error ret;
 220
 221    svga_hwtnl_set_unfilled( svga->hwtnl,
 222                             svga->curr.rast->hw_unfilled );
 223
 224    svga_hwtnl_set_flatshade( svga->hwtnl,
 225                              svga->curr.rast->templ.flatshade,
 226                              svga->curr.rast->templ.flatshade_first );
 227
 228    ret = svga_upload_user_buffers( svga, start, count, instance_count );
 229
 230    if (ret != PIPE_OK)
 231       goto retry;
 232
 233    ret = svga_update_state( svga, SVGA_STATE_HW_DRAW );
 234    if (ret)
 235       goto retry;
 236
 237    ret = svga_hwtnl_draw_arrays( svga->hwtnl, prim,
 238                                  start, count );
 239    if (ret)
 240       goto retry;
 241
 242    return 0;
 243
 244 retry:
 245    if (ret == PIPE_ERROR_OUT_OF_MEMORY && do_retry)
 246    {
 247       svga_context_flush( svga, NULL );
 248
 249       return retry_draw_arrays( svga,
 250                                 prim,
 251                                 start,
 252                                 count,
 253                                 instance_count,
 254                                 FALSE );
 255    }
 256
 257    return ret;
 258 }
 259
 260
 261 static void
 262 svga_draw_vbo(struct pipe_context *pipe, const struct pipe_draw_info *info)
 263 {
 264    struct svga_context *svga = svga_context( pipe );
 265    unsigned reduced_prim = u_reduced_prim( info->mode );
 266    unsigned count = info->count;
 267    enum pipe_error ret = 0;
 268    boolean needed_swtnl;
 269
 270    if (!u_trim_pipe_prim( info->mode, &count ))
 271       return;
 272
 273    /*
 274     * Mark currently bound target surfaces as dirty
 275     * doesn't really matter if it is done before drawing.
 276     *
 277     * TODO If we ever normaly return something other then
 278     * true we should not mark it as dirty then.
 279     */
 280    svga_mark_surfaces_dirty(svga_context(pipe));
 281
 282    if (svga->curr.reduced_prim != reduced_prim) {
 283       svga->curr.reduced_prim = reduced_prim;
 284       svga->dirty |= SVGA_NEW_REDUCED_PRIMITIVE;
 285    }
 286
 287    needed_swtnl = svga->state.sw.need_swtnl;
 288
 289    svga_update_state_retry( svga, SVGA_STATE_NEED_SWTNL );
 290
 291 #ifdef DEBUG
 292    if (svga->curr.vs->base.id == svga->debug.disable_shader ||
 293        svga->curr.fs->base.id == svga->debug.disable_shader)
 294       return;
 295 #endif
 296
 297    if (svga->state.sw.need_swtnl) {
 298       if (!needed_swtnl) {
 299          /*
 300           * We're switching from HW to SW TNL.  SW TNL will require mapping all
 301           * currently bound vertex buffers, some of which may already be
 302           * referenced in the current command buffer as result of previous HW
 303           * TNL. So flush now, to prevent the context to flush while a referred
 304           * vertex buffer is mapped.
 305           */
 306
 307          svga_context_flush(svga, NULL);
 308       }
 309
 310       /* Avoid leaking the previous hwtnl bias to swtnl */
 311       svga_hwtnl_set_index_bias( svga->hwtnl, 0 );
 312       ret = svga_swtnl_draw_vbo( svga, info );
 313    }
 314    else {
 315       if (info->indexed && svga->curr.ib.buffer) {
 316          unsigned offset;
 317
 318          assert(svga->curr.ib.offset % svga->curr.ib.index_size == 0);
 319          offset = svga->curr.ib.offset / svga->curr.ib.index_size;
 320
 321          ret = retry_draw_range_elements( svga,
 322                                           svga->curr.ib.buffer,
 323                                           svga->curr.ib.index_size,
 324                                           info->index_bias,
 325                                           info->min_index,
 326                                           info->max_index,
 327                                           info->mode,
 328                                           info->start + offset,
 329                                           info->count,
 330                                           info->instance_count,
 331                                           TRUE );
 332       }
 333       else {
 334          ret = retry_draw_arrays( svga,
 335                                   info->mode,
 336                                   info->start,
 337                                   info->count,
 338                                   info->instance_count,
 339                                   TRUE );
 340       }
 341    }
 342
 343    svga_release_user_upl_buffers( svga );
 344
 345    if (SVGA_DEBUG & DEBUG_FLUSH) {
 346       svga_hwtnl_flush_retry( svga );
 347       svga_context_flush(svga, NULL);
 348    }
 349 }
 350
 351
 352 void svga_init_draw_functions( struct svga_context *svga )
 353 {
 354    svga->pipe.draw_vbo = svga_draw_vbo;
 355 }