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