src/gallium/drivers/i965/brw_draw_upload.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
   4  * All Rights Reserved.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sub license, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
  22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28 #include "pipe/p_context.h"
  29 #include "util/u_inlines.h"
  30
  31 #include "util/u_upload_mgr.h"
  32 #include "util/u_math.h"
  33
  34 #include "brw_draw.h"
  35 #include "brw_defines.h"
  36 #include "brw_context.h"
  37 #include "brw_state.h"
  38 #include "brw_screen.h"
  39 #include "brw_batchbuffer.h"
  40 #include "brw_debug.h"
  41 #include "brw_resource.h"
  42
  43
  44
  45
  46 static unsigned get_index_type(int type)
  47 {
  48    switch (type) {
  49    case 1: return BRW_INDEX_BYTE;
  50    case 2: return BRW_INDEX_WORD;
  51    case 4: return BRW_INDEX_DWORD;
  52    default: assert(0); return 0;
  53    }
  54 }
  55
  56
  57 static int brw_prepare_vertices(struct brw_context *brw)
  58 {
  59    unsigned int min_index = brw->curr.min_index;
  60    unsigned int max_index = brw->curr.max_index;
  61    GLuint i;
  62    int ret;
  63
  64    if (BRW_DEBUG & DEBUG_VERTS)
  65       debug_printf("%s %d..%d\n", __FUNCTION__, min_index, max_index);
  66
  67
  68    for (i = 0; i < brw->curr.num_vertex_buffers; i++) {
  69       struct pipe_vertex_buffer *vb = &brw->curr.vertex_buffer[i];
  70       struct brw_winsys_buffer *bo;
  71       struct pipe_resource *upload_buf = NULL;
  72       unsigned offset;
  73
  74       if (BRW_DEBUG & DEBUG_VERTS)
  75          debug_printf("%s vb[%d] user:%d offset:0x%x sz:0x%x stride:0x%x\n",
  76                       __FUNCTION__, i,
  77                       brw_buffer_is_user_buffer(vb->buffer),
  78                       vb->buffer_offset,
  79                       vb->buffer->width0,
  80                       vb->stride);
  81
  82       if (brw_buffer_is_user_buffer(vb->buffer)) {
  83
  84          /* XXX: simplify this.  Stop the state trackers from generating
  85           * zero-stride buffers & have them use additional constants (or
  86           * add support for >1 constant buffer) instead.
  87           */
  88          unsigned size = (vb->stride == 0 ?
  89                           vb->buffer->width0 - vb->buffer_offset :
  90                           MAX2(vb->buffer->width0 - vb->buffer_offset,
  91                                vb->stride * (max_index + 1 - min_index)));
  92
  93          ret = u_upload_buffer( brw->vb.upload_vertex,
  94                                 vb->buffer_offset + min_index * vb->stride,
  95                                 size,
  96                                 vb->buffer,
  97                                 &offset,
  98                                 &upload_buf );
  99          if (ret)
 100             return ret;
 101
 102          bo = brw_buffer(upload_buf)->bo;
 103
 104          assert(offset + size <= bo->size);
 105       }
 106       else
 107       {
 108          offset = vb->buffer_offset;
 109          bo = brw_buffer(vb->buffer)->bo;
 110       }
 111
 112       assert(offset < bo->size);
 113
 114       /* Set up post-upload info about this vertex buffer:
 115        */
 116       brw->vb.vb[i].offset = offset;
 117       brw->vb.vb[i].stride = vb->stride;
 118       brw->vb.vb[i].vertex_count = (vb->stride == 0 ?
 119                                     1 :
 120                                     (bo->size - offset) / vb->stride);
 121
 122       bo_reference( &brw->vb.vb[i].bo,  bo );
 123
 124       /* Don't need to retain this reference.  We have a reference on
 125        * the underlying winsys buffer:
 126        */
 127       pipe_resource_reference( &upload_buf, NULL );
 128    }
 129
 130    brw->vb.nr_vb = i;
 131    brw_prepare_query_begin(brw);
 132
 133    for (i = 0; i < brw->vb.nr_vb; i++) {
 134       brw_add_validated_bo(brw, brw->vb.vb[i].bo);
 135    }
 136
 137    return 0;
 138 }
 139
 140 static int brw_emit_vertex_buffers( struct brw_context *brw )
 141 {
 142    int i;
 143
 144    /* If the VS doesn't read any inputs (calculating vertex position from
 145     * a state variable for some reason, for example), just bail.
 146     *
 147     * The stale VB state stays in place, but they don't do anything unless
 148     * a VE loads from them.
 149     */
 150    if (brw->vb.nr_vb == 0) {
 151       if (BRW_DEBUG & DEBUG_VERTS)
 152          debug_printf("%s: no active vertex buffers\n", __FUNCTION__);
 153
 154       return 0;
 155    }
 156
 157    /* Emit VB state packets.
 158     */
 159    BEGIN_BATCH(1 + brw->vb.nr_vb * 4, IGNORE_CLIPRECTS);
 160    OUT_BATCH((CMD_VERTEX_BUFFER << 16) |
 161              ((1 + brw->vb.nr_vb * 4) - 2));
 162
 163    for (i = 0; i < brw->vb.nr_vb; i++) {
 164       OUT_BATCH((i << BRW_VB0_INDEX_SHIFT) |
 165                 BRW_VB0_ACCESS_VERTEXDATA |
 166                 (brw->vb.vb[i].stride << BRW_VB0_PITCH_SHIFT));
 167       OUT_RELOC(brw->vb.vb[i].bo,
 168                 BRW_USAGE_VERTEX,
 169                 brw->vb.vb[i].offset);
 170       if (BRW_IS_IGDNG(brw)) {
 171          OUT_RELOC(brw->vb.vb[i].bo,
 172                    BRW_USAGE_VERTEX,
 173                    brw->vb.vb[i].bo->size - 1);
 174       } else
 175          OUT_BATCH(brw->vb.vb[i].stride ? brw->vb.vb[i].vertex_count : 0);
 176       OUT_BATCH(0); /* Instance data step rate */
 177    }
 178    ADVANCE_BATCH();
 179    return 0;
 180 }
 181
 182
 183
 184 static int brw_emit_vertex_elements(struct brw_context *brw)
 185 {
 186    const struct brw_vertex_element_packet *brw_velems = brw->curr.velems;
 187    unsigned size = brw_velems->header.length + 2;
 188
 189    /* why is this here */
 190    brw_emit_query_begin(brw);
 191
 192    brw_batchbuffer_data(brw->batch, brw_velems, size * 4, IGNORE_CLIPRECTS);
 193
 194    return 0;
 195 }
 196
 197
 198 static int brw_emit_vertices( struct brw_context *brw )
 199 {
 200    int ret;
 201
 202    ret = brw_emit_vertex_buffers( brw );
 203    if (ret)
 204       return ret;
 205
 206    /* XXX should separate this? */
 207    ret = brw_emit_vertex_elements( brw );
 208    if (ret)
 209       return ret;
 210
 211    return 0;
 212 }
 213
 214
 215 const struct brw_tracked_state brw_vertices = {
 216    .dirty = {
 217       .mesa = (PIPE_NEW_INDEX_RANGE |
 218                PIPE_NEW_VERTEX_BUFFER |
 219                PIPE_NEW_VERTEX_ELEMENT),
 220       .brw = BRW_NEW_BATCH,
 221       .cache = 0,
 222    },
 223    .prepare = brw_prepare_vertices,
 224    .emit = brw_emit_vertices,
 225 };
 226
 227
 228 static int brw_prepare_indices(struct brw_context *brw)
 229 {
 230    struct pipe_resource *index_buffer = brw->curr.index_buffer;
 231    struct pipe_resource *upload_buf = NULL;
 232    struct brw_winsys_buffer *bo = NULL;
 233    GLuint offset;
 234    GLuint index_size;
 235    GLuint ib_size;
 236    int ret;
 237
 238    if (index_buffer == NULL)
 239       return 0;
 240
 241    if (BRW_DEBUG & DEBUG_VERTS)
 242       debug_printf("%s: index_size:%d index_buffer->size:%d\n",
 243                    __FUNCTION__,
 244                    brw->curr.index_size,
 245                    brw->curr.index_buffer->width0);
 246
 247    ib_size = index_buffer->width0;
 248    index_size = brw->curr.index_size;
 249
 250    /* Turn userbuffer into a proper hardware buffer?
 251     */
 252    if (brw_buffer_is_user_buffer(index_buffer)) {
 253
 254       ret = u_upload_buffer( brw->vb.upload_index,
 255                              0,
 256                              ib_size,
 257                              index_buffer,
 258                              &offset,
 259                              &upload_buf );
 260       if (ret)
 261          return ret;
 262
 263       bo = brw_buffer(upload_buf)->bo;
 264
 265       /* XXX: annotate the userbuffer with the upload information so
 266        * that successive calls don't get re-uploaded.
 267        */
 268    }
 269    else {
 270       bo = brw_buffer(index_buffer)->bo;
 271       ib_size = bo->size;
 272       offset = 0;
 273    }
 274
 275    /* Use CMD_3D_PRIM's start_vertex_offset to avoid re-uploading the
 276     * index buffer state when we're just moving the start index of our
 277     * drawing.
 278     *
 279     * In gallium this will happen in the case where successive draw
 280     * calls are made with (distinct?) userbuffers, but the upload_mgr
 281     * places the data into a single winsys buffer.
 282     *
 283     * This statechange doesn't raise any state flags and is always
 284     * just merged into the final draw packet:
 285     */
 286    if (1) {
 287       assert((offset & (index_size - 1)) == 0);
 288       brw->ib.start_vertex_offset = offset / index_size;
 289    }
 290
 291    /* These statechanges trigger a new CMD_INDEX_BUFFER packet:
 292     */
 293    if (brw->ib.bo != bo ||
 294        brw->ib.size != ib_size)
 295    {
 296       bo_reference(&brw->ib.bo, bo);
 297       brw->ib.size = ib_size;
 298       brw->state.dirty.brw |= BRW_NEW_INDEX_BUFFER;
 299    }
 300
 301    pipe_resource_reference( &upload_buf, NULL );
 302    brw_add_validated_bo(brw, brw->ib.bo);
 303    return 0;
 304 }
 305
 306 const struct brw_tracked_state brw_indices = {
 307    .dirty = {
 308       .mesa = PIPE_NEW_INDEX_BUFFER,
 309       .brw = 0,
 310       .cache = 0,
 311    },
 312    .prepare = brw_prepare_indices,
 313 };
 314
 315 static int brw_emit_index_buffer(struct brw_context *brw)
 316 {
 317    /* Emit the indexbuffer packet:
 318     */
 319    if (brw->ib.bo)
 320    {
 321       struct brw_indexbuffer ib;
 322
 323       memset(&ib, 0, sizeof(ib));
 324
 325       ib.header.bits.opcode = CMD_INDEX_BUFFER;
 326       ib.header.bits.length = sizeof(ib)/4 - 2;
 327       ib.header.bits.index_format = get_index_type(brw->ib.size);
 328       ib.header.bits.cut_index_enable = 0;
 329
 330       BEGIN_BATCH(4, IGNORE_CLIPRECTS);
 331       OUT_BATCH( ib.header.dword );
 332       OUT_RELOC(brw->ib.bo,
 333                 BRW_USAGE_VERTEX,
 334                 brw->ib.offset);
 335       OUT_RELOC(brw->ib.bo,
 336                 BRW_USAGE_VERTEX,
 337                 brw->ib.offset + brw->ib.size - 1);
 338       OUT_BATCH( 0 );
 339       ADVANCE_BATCH();
 340    }
 341
 342    return 0;
 343 }
 344
 345 const struct brw_tracked_state brw_index_buffer = {
 346    .dirty = {
 347       .mesa = 0,
 348       .brw = BRW_NEW_BATCH | BRW_NEW_INDEX_BUFFER,
 349       .cache = 0,
 350    },
 351    .emit = brw_emit_index_buffer,
 352 };