src/mesa/state_tracker/st_cb_bufferobjects.c

   1 /**************************************************************************
   2  *
   3  * Copyright 2007 VMware, Inc.
   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
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  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
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  21  * IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
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  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28
  29 /**
  30  * Functions for pixel buffer objects and vertex/element buffer objects.
  31  */
  32
  33
  34 #include <inttypes.h>  /* for PRId64 macro */
  35
  36 #include "main/imports.h"
  37 #include "main/mtypes.h"
  38 #include "main/arrayobj.h"
  39 #include "main/bufferobj.h"
  40
  41 #include "st_context.h"
  42 #include "st_cb_bufferobjects.h"
  43 #include "st_debug.h"
  44
  45 #include "pipe/p_context.h"
  46 #include "pipe/p_defines.h"
  47 #include "util/u_inlines.h"
  48
  49
  50 /**
  51  * There is some duplication between mesa's bufferobjects and our
  52  * bufmgr buffers.  Both have an integer handle and a hashtable to
  53  * lookup an opaque structure.  It would be nice if the handles and
  54  * internal structure where somehow shared.
  55  */
  56 static struct gl_buffer_object *
  57 st_bufferobj_alloc(struct gl_context *ctx, GLuint name)
  58 {
  59    struct st_buffer_object *st_obj = ST_CALLOC_STRUCT(st_buffer_object);
  60
  61    if (!st_obj)
  62       return NULL;
  63
  64    _mesa_initialize_buffer_object(ctx, &st_obj->Base, name);
  65
  66    return &st_obj->Base;
  67 }
  68
  69
  70
  71 /**
  72  * Deallocate/free a vertex/pixel buffer object.
  73  * Called via glDeleteBuffersARB().
  74  */
  75 static void
  76 st_bufferobj_free(struct gl_context *ctx, struct gl_buffer_object *obj)
  77 {
  78    struct st_buffer_object *st_obj = st_buffer_object(obj);
  79
  80    assert(obj->RefCount == 0);
  81    _mesa_buffer_unmap_all_mappings(ctx, obj);
  82
  83    if (st_obj->buffer)
  84       pipe_resource_reference(&st_obj->buffer, NULL);
  85
  86    _mesa_delete_buffer_object(ctx, obj);
  87 }
  88
  89
  90
  91 /**
  92  * Replace data in a subrange of buffer object.  If the data range
  93  * specified by size + offset extends beyond the end of the buffer or
  94  * if data is NULL, no copy is performed.
  95  * Called via glBufferSubDataARB().
  96  */
  97 static void
  98 st_bufferobj_subdata(struct gl_context *ctx,
  99                      GLintptrARB offset,
 100                      GLsizeiptrARB size,
 101                      const GLvoid * data, struct gl_buffer_object *obj)
 102 {
 103    struct st_buffer_object *st_obj = st_buffer_object(obj);
 104
 105    /* we may be called from VBO code, so double-check params here */
 106    assert(offset >= 0);
 107    assert(size >= 0);
 108    assert(offset + size <= obj->Size);
 109
 110    if (!size)
 111       return;
 112
 113    /*
 114     * According to ARB_vertex_buffer_object specification, if data is null,
 115     * then the contents of the buffer object's data store is undefined. We just
 116     * ignore, and leave it unchanged.
 117     */
 118    if (!data)
 119       return;
 120
 121    if (!st_obj->buffer) {
 122       /* we probably ran out of memory during buffer allocation */
 123       return;
 124    }
 125
 126    /* Now that transfers are per-context, we don't have to figure out
 127     * flushing here.  Usually drivers won't need to flush in this case
 128     * even if the buffer is currently referenced by hardware - they
 129     * just queue the upload as dma rather than mapping the underlying
 130     * buffer directly.
 131     */
 132    pipe_buffer_write(st_context(ctx)->pipe,
 133                      st_obj->buffer,
 134                      offset, size, data);
 135 }
 136
 137
 138 /**
 139  * Called via glGetBufferSubDataARB().
 140  */
 141 static void
 142 st_bufferobj_get_subdata(struct gl_context *ctx,
 143                          GLintptrARB offset,
 144                          GLsizeiptrARB size,
 145                          GLvoid * data, struct gl_buffer_object *obj)
 146 {
 147    struct st_buffer_object *st_obj = st_buffer_object(obj);
 148
 149    /* we may be called from VBO code, so double-check params here */
 150    assert(offset >= 0);
 151    assert(size >= 0);
 152    assert(offset + size <= obj->Size);
 153
 154    if (!size)
 155       return;
 156
 157    if (!st_obj->buffer) {
 158       /* we probably ran out of memory during buffer allocation */
 159       return;
 160    }
 161
 162    pipe_buffer_read(st_context(ctx)->pipe, st_obj->buffer,
 163                     offset, size, data);
 164 }
 165
 166
 167 /**
 168  * Allocate space for and store data in a buffer object.  Any data that was
 169  * previously stored in the buffer object is lost.  If data is NULL,
 170  * memory will be allocated, but no copy will occur.
 171  * Called via ctx->Driver.BufferData().
 172  * \return GL_TRUE for success, GL_FALSE if out of memory
 173  */
 174 static GLboolean
 175 st_bufferobj_data(struct gl_context *ctx,
 176                   GLenum target,
 177                   GLsizeiptrARB size,
 178                   const GLvoid * data,
 179                   GLenum usage,
 180                   GLbitfield storageFlags,
 181                   struct gl_buffer_object *obj)
 182 {
 183    struct st_context *st = st_context(ctx);
 184    struct pipe_context *pipe = st->pipe;
 185    struct st_buffer_object *st_obj = st_buffer_object(obj);
 186    unsigned bind, pipe_usage, pipe_flags = 0;
 187
 188    if (target != GL_EXTERNAL_VIRTUAL_MEMORY_BUFFER_AMD &&
 189        size && data && st_obj->buffer &&
 190        st_obj->Base.Size == size &&
 191        st_obj->Base.Usage == usage &&
 192        st_obj->Base.StorageFlags == storageFlags) {
 193       /* Just discard the old contents and write new data.
 194        * This should be the same as creating a new buffer, but we avoid
 195        * a lot of validation in Mesa.
 196        */
 197       struct pipe_box box;
 198
 199       u_box_1d(0, size, &box);
 200       pipe->transfer_inline_write(pipe, st_obj->buffer, 0,
 201                                   PIPE_TRANSFER_DISCARD_WHOLE_RESOURCE,
 202                                   &box, data, 0, 0);
 203       return GL_TRUE;
 204    }
 205
 206    st_obj->Base.Size = size;
 207    st_obj->Base.Usage = usage;
 208    st_obj->Base.StorageFlags = storageFlags;
 209
 210    switch (target) {
 211    case GL_PIXEL_PACK_BUFFER_ARB:
 212    case GL_PIXEL_UNPACK_BUFFER_ARB:
 213       bind = PIPE_BIND_RENDER_TARGET | PIPE_BIND_SAMPLER_VIEW;
 214       break;
 215    case GL_ARRAY_BUFFER_ARB:
 216       bind = PIPE_BIND_VERTEX_BUFFER;
 217       break;
 218    case GL_ELEMENT_ARRAY_BUFFER_ARB:
 219       bind = PIPE_BIND_INDEX_BUFFER;
 220       break;
 221    case GL_TEXTURE_BUFFER:
 222       bind = PIPE_BIND_SAMPLER_VIEW;
 223       break;
 224    case GL_TRANSFORM_FEEDBACK_BUFFER:
 225       bind = PIPE_BIND_STREAM_OUTPUT;
 226       break;
 227    case GL_UNIFORM_BUFFER:
 228       bind = PIPE_BIND_CONSTANT_BUFFER;
 229       break;
 230    case GL_DRAW_INDIRECT_BUFFER:
 231       bind = PIPE_BIND_COMMAND_ARGS_BUFFER;
 232       break;
 233    default:
 234       bind = 0;
 235    }
 236
 237    /* Set usage. */
 238    if (st_obj->Base.Immutable) {
 239       /* BufferStorage */
 240       if (storageFlags & GL_CLIENT_STORAGE_BIT)
 241          pipe_usage = PIPE_USAGE_STAGING;
 242       else
 243          pipe_usage = PIPE_USAGE_DEFAULT;
 244    }
 245    else {
 246       /* BufferData */
 247       switch (usage) {
 248       case GL_STATIC_DRAW:
 249       case GL_STATIC_COPY:
 250       default:
 251          pipe_usage = PIPE_USAGE_DEFAULT;
 252          break;
 253       case GL_DYNAMIC_DRAW:
 254       case GL_DYNAMIC_COPY:
 255          pipe_usage = PIPE_USAGE_DYNAMIC;
 256          break;
 257       case GL_STREAM_DRAW:
 258       case GL_STREAM_COPY:
 259          /* XXX: Remove this test and fall-through when we have PBO unpacking
 260           * acceleration. Right now, PBO unpacking is done by the CPU, so we
 261           * have to make sure CPU reads are fast.
 262           */
 263          if (target != GL_PIXEL_UNPACK_BUFFER_ARB) {
 264             pipe_usage = PIPE_USAGE_STREAM;
 265             break;
 266          }
 267          /* fall through */
 268       case GL_STATIC_READ:
 269       case GL_DYNAMIC_READ:
 270       case GL_STREAM_READ:
 271          pipe_usage = PIPE_USAGE_STAGING;
 272          break;
 273       }
 274    }
 275
 276    /* Set flags. */
 277    if (storageFlags & GL_MAP_PERSISTENT_BIT)
 278       pipe_flags |= PIPE_RESOURCE_FLAG_MAP_PERSISTENT;
 279    if (storageFlags & GL_MAP_COHERENT_BIT)
 280       pipe_flags |= PIPE_RESOURCE_FLAG_MAP_COHERENT;
 281
 282    pipe_resource_reference( &st_obj->buffer, NULL );
 283
 284    if (ST_DEBUG & DEBUG_BUFFER) {
 285       debug_printf("Create buffer size %" PRId64 " bind 0x%x\n",
 286                    (int64_t) size, bind);
 287    }
 288
 289    if (size != 0) {
 290       struct pipe_screen *screen = pipe->screen;
 291       struct pipe_resource buffer;
 292
 293       memset(&buffer, 0, sizeof buffer);
 294       buffer.target = PIPE_BUFFER;
 295       buffer.format = PIPE_FORMAT_R8_UNORM; /* want TYPELESS or similar */
 296       buffer.bind = bind;
 297       buffer.usage = pipe_usage;
 298       buffer.flags = pipe_flags;
 299       buffer.width0 = size;
 300       buffer.height0 = 1;
 301       buffer.depth0 = 1;
 302       buffer.array_size = 1;
 303
 304       if (target == GL_EXTERNAL_VIRTUAL_MEMORY_BUFFER_AMD) {
 305          st_obj->buffer =
 306             screen->resource_from_user_memory(screen, &buffer, (void*)data);
 307       }
 308       else {
 309          st_obj->buffer = screen->resource_create(screen, &buffer);
 310
 311          if (st_obj->buffer && data)
 312             pipe_buffer_write(pipe, st_obj->buffer, 0, size, data);
 313       }
 314
 315       if (!st_obj->buffer) {
 316          /* out of memory */
 317          st_obj->Base.Size = 0;
 318          return GL_FALSE;
 319       }
 320    }
 321
 322    /* BufferData may change an array or uniform buffer, need to update it */
 323    st->dirty.st |= ST_NEW_VERTEX_ARRAYS | ST_NEW_UNIFORM_BUFFER;
 324
 325    return GL_TRUE;
 326 }
 327
 328
 329 /**
 330  * Called via glMapBufferRange().
 331  */
 332 static void *
 333 st_bufferobj_map_range(struct gl_context *ctx,
 334                        GLintptr offset, GLsizeiptr length, GLbitfield access,
 335                        struct gl_buffer_object *obj,
 336                        gl_map_buffer_index index)
 337 {
 338    struct pipe_context *pipe = st_context(ctx)->pipe;
 339    struct st_buffer_object *st_obj = st_buffer_object(obj);
 340    enum pipe_transfer_usage flags = 0x0;
 341
 342    if (access & GL_MAP_WRITE_BIT)
 343       flags |= PIPE_TRANSFER_WRITE;
 344
 345    if (access & GL_MAP_READ_BIT)
 346       flags |= PIPE_TRANSFER_READ;
 347
 348    if (access & GL_MAP_FLUSH_EXPLICIT_BIT)
 349       flags |= PIPE_TRANSFER_FLUSH_EXPLICIT;
 350
 351    if (access & GL_MAP_INVALIDATE_BUFFER_BIT) {
 352       flags |= PIPE_TRANSFER_DISCARD_WHOLE_RESOURCE;
 353    }
 354    else if (access & GL_MAP_INVALIDATE_RANGE_BIT) {
 355       if (offset == 0 && length == obj->Size)
 356          flags |= PIPE_TRANSFER_DISCARD_WHOLE_RESOURCE;
 357       else
 358          flags |= PIPE_TRANSFER_DISCARD_RANGE;
 359    }
 360
 361    if (access & GL_MAP_UNSYNCHRONIZED_BIT)
 362       flags |= PIPE_TRANSFER_UNSYNCHRONIZED;
 363
 364    if (access & GL_MAP_PERSISTENT_BIT)
 365       flags |= PIPE_TRANSFER_PERSISTENT;
 366
 367    if (access & GL_MAP_COHERENT_BIT)
 368       flags |= PIPE_TRANSFER_COHERENT;
 369
 370    /* ... other flags ...
 371     */
 372
 373    if (access & MESA_MAP_NOWAIT_BIT)
 374       flags |= PIPE_TRANSFER_DONTBLOCK;
 375
 376    assert(offset >= 0);
 377    assert(length >= 0);
 378    assert(offset < obj->Size);
 379    assert(offset + length <= obj->Size);
 380
 381    obj->Mappings[index].Pointer = pipe_buffer_map_range(pipe,
 382                                         st_obj->buffer,
 383                                         offset, length,
 384                                         flags,
 385                                         &st_obj->transfer[index]);
 386    if (obj->Mappings[index].Pointer) {
 387       obj->Mappings[index].Offset = offset;
 388       obj->Mappings[index].Length = length;
 389       obj->Mappings[index].AccessFlags = access;
 390    }
 391    else {
 392       st_obj->transfer[index] = NULL;
 393    }
 394
 395    return obj->Mappings[index].Pointer;
 396 }
 397
 398
 399 static void
 400 st_bufferobj_flush_mapped_range(struct gl_context *ctx,
 401                                 GLintptr offset, GLsizeiptr length,
 402                                 struct gl_buffer_object *obj,
 403                                 gl_map_buffer_index index)
 404 {
 405    struct pipe_context *pipe = st_context(ctx)->pipe;
 406    struct st_buffer_object *st_obj = st_buffer_object(obj);
 407
 408    /* Subrange is relative to mapped range */
 409    assert(offset >= 0);
 410    assert(length >= 0);
 411    assert(offset + length <= obj->Mappings[index].Length);
 412    assert(obj->Mappings[index].Pointer);
 413
 414    if (!length)
 415       return;
 416
 417    pipe_buffer_flush_mapped_range(pipe, st_obj->transfer[index],
 418                                   obj->Mappings[index].Offset + offset,
 419                                   length);
 420 }
 421
 422
 423 /**
 424  * Called via glUnmapBufferARB().
 425  */
 426 static GLboolean
 427 st_bufferobj_unmap(struct gl_context *ctx, struct gl_buffer_object *obj,
 428                    gl_map_buffer_index index)
 429 {
 430    struct pipe_context *pipe = st_context(ctx)->pipe;
 431    struct st_buffer_object *st_obj = st_buffer_object(obj);
 432
 433    if (obj->Mappings[index].Length)
 434       pipe_buffer_unmap(pipe, st_obj->transfer[index]);
 435
 436    st_obj->transfer[index] = NULL;
 437    obj->Mappings[index].Pointer = NULL;
 438    obj->Mappings[index].Offset = 0;
 439    obj->Mappings[index].Length = 0;
 440    return GL_TRUE;
 441 }
 442
 443
 444 /**
 445  * Called via glCopyBufferSubData().
 446  */
 447 static void
 448 st_copy_buffer_subdata(struct gl_context *ctx,
 449                        struct gl_buffer_object *src,
 450                        struct gl_buffer_object *dst,
 451                        GLintptr readOffset, GLintptr writeOffset,
 452                        GLsizeiptr size)
 453 {
 454    struct pipe_context *pipe = st_context(ctx)->pipe;
 455    struct st_buffer_object *srcObj = st_buffer_object(src);
 456    struct st_buffer_object *dstObj = st_buffer_object(dst);
 457    struct pipe_box box;
 458
 459    if (!size)
 460       return;
 461
 462    /* buffer should not already be mapped */
 463    assert(!_mesa_check_disallowed_mapping(src));
 464    assert(!_mesa_check_disallowed_mapping(dst));
 465
 466    u_box_1d(readOffset, size, &box);
 467
 468    pipe->resource_copy_region(pipe, dstObj->buffer, 0, writeOffset, 0, 0,
 469                               srcObj->buffer, 0, &box);
 470 }
 471
 472 /**
 473  * Called via glClearBufferSubData().
 474  */
 475 static void
 476 st_clear_buffer_subdata(struct gl_context *ctx,
 477                         GLintptr offset, GLsizeiptr size,
 478                         const GLvoid *clearValue,
 479                         GLsizeiptr clearValueSize,
 480                         struct gl_buffer_object *bufObj)
 481 {
 482    struct pipe_context *pipe = st_context(ctx)->pipe;
 483    struct st_buffer_object *buf = st_buffer_object(bufObj);
 484    static const char zeros[16] = {0};
 485
 486    if (!pipe->clear_buffer) {
 487       _mesa_ClearBufferSubData_sw(ctx, offset, size,
 488                                   clearValue, clearValueSize, bufObj);
 489       return;
 490    }
 491
 492    if (!clearValue)
 493       clearValue = zeros;
 494
 495    pipe->clear_buffer(pipe, buf->buffer, offset, size,
 496                       clearValue, clearValueSize);
 497 }
 498
 499
 500 /* TODO: if buffer wasn't created with appropriate usage flags, need
 501  * to recreate it now and copy contents -- or possibly create a
 502  * gallium entrypoint to extend the usage flags and let the driver
 503  * decide if a copy is necessary.
 504  */
 505 void
 506 st_bufferobj_validate_usage(struct st_context *st,
 507                             struct st_buffer_object *obj,
 508                             unsigned usage)
 509 {
 510 }
 511
 512
 513 void
 514 st_init_bufferobject_functions(struct dd_function_table *functions)
 515 {
 516    /* plug in default driver fallbacks (such as for ClearBufferSubData) */
 517    _mesa_init_buffer_object_functions(functions);
 518
 519    functions->NewBufferObject = st_bufferobj_alloc;
 520    functions->DeleteBuffer = st_bufferobj_free;
 521    functions->BufferData = st_bufferobj_data;
 522    functions->BufferSubData = st_bufferobj_subdata;
 523    functions->GetBufferSubData = st_bufferobj_get_subdata;
 524    functions->MapBufferRange = st_bufferobj_map_range;
 525    functions->FlushMappedBufferRange = st_bufferobj_flush_mapped_range;
 526    functions->UnmapBuffer = st_bufferobj_unmap;
 527    functions->CopyBufferSubData = st_copy_buffer_subdata;
 528    functions->ClearBufferSubData = st_clear_buffer_subdata;
 529 }