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
  42
  43
  44
  45 static unsigned get_index_type(int type)
  46 {
  47    switch (type) {
  48    case 1: return BRW_INDEX_BYTE;
  49    case 2: return BRW_INDEX_WORD;
  50    case 4: return BRW_INDEX_DWORD;
  51    default: assert(0); return 0;
  52    }
  53 }
  54
  55
  56 static int brw_prepare_vertices(struct brw_context *brw)
  57 {
  58    unsigned int min_index = brw->curr.min_index;
  59    unsigned int max_index = brw->curr.max_index;
  60    GLuint i;
  61    int ret;
  62
  63    if (BRW_DEBUG & DEBUG_VERTS)
  64       debug_printf("%s %d..%d\n", __FUNCTION__, min_index, max_index);
  65
  66
  67    for (i = 0; i < brw->curr.num_vertex_buffers; i++) {
  68       struct pipe_vertex_buffer *vb = &brw->curr.vertex_buffer[i];
  69       struct brw_winsys_buffer *bo;
  70       struct pipe_buffer *upload_buf = NULL;
  71       unsigned offset;
  72
  73       if (BRW_DEBUG & DEBUG_VERTS)
  74          debug_printf("%s vb[%d] user:%d offset:0x%x sz:0x%x stride:0x%x\n",
  75                       __FUNCTION__, i,
  76                       brw_buffer_is_user_buffer(vb->buffer),
  77                       vb->buffer_offset,
  78                       vb->buffer->size,
  79                       vb->stride);
  80
  81       if (brw_buffer_is_user_buffer(vb->buffer)) {
  82
  83          /* XXX: simplify this.  Stop the state trackers from generating
  84           * zero-stride buffers & have them use additional constants (or
  85           * add support for >1 constant buffer) instead.
  86           */
  87          unsigned size = (vb->stride == 0 ?
  88                           vb->buffer->size - vb->buffer_offset :
  89                           MAX2(vb->buffer->size - vb->buffer_offset,
  90                                vb->stride * (max_index + 1 - min_index)));
  91
  92          ret = u_upload_buffer( brw->vb.upload_vertex,
  93                                 vb->buffer_offset + min_index * vb->stride,
  94                                 size,
  95                                 vb->buffer,
  96                                 &offset,
  97                                 &upload_buf );
  98          if (ret)
  99             return ret;
 100
 101          bo = brw_buffer(upload_buf)->bo;
 102
 103          assert(offset + size <= bo->size);
 104       }
 105       else
 106       {
 107          offset = vb->buffer_offset;
 108          bo = brw_buffer(vb->buffer)->bo;
 109       }
 110
 111       assert(offset < bo->size);
 112
 113       /* Set up post-upload info about this vertex buffer:
 114        */
 115       brw->vb.vb[i].offset = offset;
 116       brw->vb.vb[i].stride = vb->stride;
 117       brw->vb.vb[i].vertex_count = (vb->stride == 0 ?
 118                                     1 :
 119                                     (bo->size - offset) / vb->stride);
 120
 121       bo_reference( &brw->vb.vb[i].bo,  bo );
 122
 123       /* Don't need to retain this reference.  We have a reference on
 124        * the underlying winsys buffer:
 125        */
 126       pipe_buffer_reference( &upload_buf, NULL );
 127    }
 128
 129    brw->vb.nr_vb = i;
 130    brw_prepare_query_begin(brw);
 131
 132    for (i = 0; i < brw->vb.nr_vb; i++) {
 133       brw_add_validated_bo(brw, brw->vb.vb[i].bo);
 134    }
 135
 136    return 0;
 137 }
 138
 139 static int brw_emit_vertex_buffers( struct brw_context *brw )
 140 {
 141    int i;
 142
 143    /* If the VS doesn't read any inputs (calculating vertex position from
 144     * a state variable for some reason, for example), just bail.
 145     *
 146     * The stale VB state stays in place, but they don't do anything unless
 147     * a VE loads from them.
 148     */
 149    if (brw->vb.nr_vb == 0) {
 150       if (BRW_DEBUG & DEBUG_VERTS)
 151          debug_printf("%s: no active vertex buffers\n", __FUNCTION__);
 152
 153       return 0;
 154    }
 155
 156    /* Emit VB state packets.
 157     */
 158    BEGIN_BATCH(1 + brw->vb.nr_vb * 4, IGNORE_CLIPRECTS);
 159    OUT_BATCH((CMD_VERTEX_BUFFER << 16) |
 160              ((1 + brw->vb.nr_vb * 4) - 2));
 161
 162    for (i = 0; i < brw->vb.nr_vb; i++) {
 163       OUT_BATCH((i << BRW_VB0_INDEX_SHIFT) |
 164                 BRW_VB0_ACCESS_VERTEXDATA |
 165                 (brw->vb.vb[i].stride << BRW_VB0_PITCH_SHIFT));
 166       OUT_RELOC(brw->vb.vb[i].bo,
 167                 BRW_USAGE_VERTEX,
 168                 brw->vb.vb[i].offset);
 169       if (BRW_IS_IGDNG(brw)) {
 170          OUT_RELOC(brw->vb.vb[i].bo,
 171                    BRW_USAGE_VERTEX,
 172                    brw->vb.vb[i].bo->size - 1);
 173       } else
 174          OUT_BATCH(brw->vb.vb[i].stride ? brw->vb.vb[i].vertex_count : 0);
 175       OUT_BATCH(0); /* Instance data step rate */
 176    }
 177    ADVANCE_BATCH();
 178    return 0;
 179 }
 180
 181
 182
 183 static int brw_emit_vertex_elements(struct brw_context *brw)
 184 {
 185    const struct brw_vertex_element_packet *brw_velems = brw->curr.velems;
 186    unsigned size = brw_velems->header.length + 2;
 187
 188    /* why is this here */
 189    brw_emit_query_begin(brw);
 190
 191    brw_batchbuffer_data(brw->batch, brw_velems, size * 4, IGNORE_CLIPRECTS);
 192
 193    return 0;
 194 }
 195
 196
 197 static int brw_emit_vertices( struct brw_context *brw )
 198 {
 199    int ret;
 200
 201    ret = brw_emit_vertex_buffers( brw );
 202    if (ret)
 203       return ret;
 204
 205    /* XXX should separate this? */
 206    ret = brw_emit_vertex_elements( brw );
 207    if (ret)
 208       return ret;
 209
 210    return 0;
 211 }
 212
 213
 214 const struct brw_tracked_state brw_vertices = {
 215    .dirty = {
 216       .mesa = (PIPE_NEW_INDEX_RANGE |
 217                PIPE_NEW_VERTEX_BUFFER |
 218                PIPE_NEW_VERTEX_ELEMENT),
 219       .brw = BRW_NEW_BATCH,
 220       .cache = 0,
 221    },
 222    .prepare = brw_prepare_vertices,
 223    .emit = brw_emit_vertices,
 224 };
 225
 226
 227 static int brw_prepare_indices(struct brw_context *brw)
 228 {
 229    struct pipe_buffer *index_buffer = brw->curr.index_buffer;
 230    struct pipe_buffer *upload_buf = NULL;
 231    struct brw_winsys_buffer *bo = NULL;
 232    GLuint offset;
 233    GLuint index_size;
 234    GLuint ib_size;
 235    int ret;
 236
 237    if (index_buffer == NULL)
 238       return 0;
 239
 240    if (BRW_DEBUG & DEBUG_VERTS)
 241       debug_printf("%s: index_size:%d index_buffer->size:%d\n",
 242                    __FUNCTION__,
 243                    brw->curr.index_size,
 244                    brw->curr.index_buffer->size);
 245
 246    ib_size = index_buffer->size;
 247    index_size = brw->curr.index_size;
 248
 249    /* Turn userbuffer into a proper hardware buffer?
 250     */
 251    if (brw_buffer_is_user_buffer(index_buffer)) {
 252
 253       ret = u_upload_buffer( brw->vb.upload_index,
 254                              0,
 255                              ib_size,
 256                              index_buffer,
 257                              &offset,
 258                              &upload_buf );
 259       if (ret)
 260          return ret;
 261
 262       bo = brw_buffer(upload_buf)->bo;
 263
 264       /* XXX: annotate the userbuffer with the upload information so
 265        * that successive calls don't get re-uploaded.
 266        */
 267    }
 268    else {
 269       bo = brw_buffer(index_buffer)->bo;
 270       ib_size = bo->size;
 271       offset = 0;
 272    }
 273
 274    /* Use CMD_3D_PRIM's start_vertex_offset to avoid re-uploading the
 275     * index buffer state when we're just moving the start index of our
 276     * drawing.
 277     *
 278     * In gallium this will happen in the case where successive draw
 279     * calls are made with (distinct?) userbuffers, but the upload_mgr
 280     * places the data into a single winsys buffer.
 281     *
 282     * This statechange doesn't raise any state flags and is always
 283     * just merged into the final draw packet:
 284     */
 285    if (1) {
 286       assert((offset & (index_size - 1)) == 0);
 287       brw->ib.start_vertex_offset = offset / index_size;
 288    }
 289
 290    /* These statechanges trigger a new CMD_INDEX_BUFFER packet:
 291     */
 292    if (brw->ib.bo != bo ||
 293        brw->ib.size != ib_size)
 294    {
 295       bo_reference(&brw->ib.bo, bo);
 296       brw->ib.size = ib_size;
 297       brw->state.dirty.brw |= BRW_NEW_INDEX_BUFFER;
 298    }
 299
 300    pipe_buffer_reference( &upload_buf, NULL );
 301    brw_add_validated_bo(brw, brw->ib.bo);
 302    return 0;
 303 }
 304
 305 const struct brw_tracked_state brw_indices = {
 306    .dirty = {
 307       .mesa = PIPE_NEW_INDEX_BUFFER,
 308       .brw = 0,
 309       .cache = 0,
 310    },
 311    .prepare = brw_prepare_indices,
 312 };
 313
 314 static int brw_emit_index_buffer(struct brw_context *brw)
 315 {
 316    /* Emit the indexbuffer packet:
 317     */
 318    if (brw->ib.bo)
 319    {
 320       struct brw_indexbuffer ib;
 321
 322       memset(&ib, 0, sizeof(ib));
 323
 324       ib.header.bits.opcode = CMD_INDEX_BUFFER;
 325       ib.header.bits.length = sizeof(ib)/4 - 2;
 326       ib.header.bits.index_format = get_index_type(brw->ib.size);
 327       ib.header.bits.cut_index_enable = 0;
 328
 329       BEGIN_BATCH(4, IGNORE_CLIPRECTS);
 330       OUT_BATCH( ib.header.dword );
 331       OUT_RELOC(brw->ib.bo,
 332                 BRW_USAGE_VERTEX,
 333                 brw->ib.offset);
 334       OUT_RELOC(brw->ib.bo,
 335                 BRW_USAGE_VERTEX,
 336                 brw->ib.offset + brw->ib.size - 1);
 337       OUT_BATCH( 0 );
 338       ADVANCE_BATCH();
 339    }
 340
 341    return 0;
 342 }
 343
 344 const struct brw_tracked_state brw_index_buffer = {
 345    .dirty = {
 346       .mesa = 0,
 347       .brw = BRW_NEW_BATCH | BRW_NEW_INDEX_BUFFER,
 348       .cache = 0,
 349    },
 350    .emit = brw_emit_index_buffer,
 351 };