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  1. /**************************************************************************
  2.  *
  3.  * Copyright 2009 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
  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 VMWARE 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. /* Helper utility for uploading user buffers & other data, and
  29.  * coalescing small buffers into larger ones.
  30.  */
  31.  
  32. #ifndef U_UPLOAD_MGR_H
  33. #define U_UPLOAD_MGR_H
  34.  
  35. #include "pipe/p_compiler.h"
  36.  
  37. struct pipe_context;
  38. struct pipe_resource;
  39.  
  40.  
  41. /**
  42.  * Create the upload manager.
  43.  *
  44.  * \param pipe          Pipe driver.
  45.  * \param default_size  Minimum size of the upload buffer, in bytes.
  46.  * \param alignment     Alignment of each suballocation in the upload buffer.
  47.  * \param bind          Bitmask of PIPE_BIND_* flags.
  48.  */
  49. struct u_upload_mgr *u_upload_create( struct pipe_context *pipe,
  50.                                       unsigned default_size,
  51.                                       unsigned alignment,
  52.                                       unsigned bind );
  53.  
  54. /**
  55.  * Destroy the upload manager.
  56.  */
  57. void u_upload_destroy( struct u_upload_mgr *upload );
  58.  
  59. /**
  60.  * Unmap and release old upload buffer.
  61.  *
  62.  * This is like u_upload_unmap() except the upload buffer is released for
  63.  * recycling. This should be called on real hardware flushes on systems
  64.  * that don't support the PIPE_TRANSFER_UNSYNCHRONIZED flag, as otherwise
  65.  * the next u_upload_buffer will cause a sync on the buffer.
  66.  */
  67. void u_upload_flush( struct u_upload_mgr *upload );
  68.  
  69. /**
  70.  * Unmap upload buffer
  71.  *
  72.  * \param upload           Upload manager
  73.  *
  74.  * This must usually be called prior to firing the command stream
  75.  * which references the upload buffer, as many memory managers either
  76.  * don't like firing a mapped buffer or cause subsequent maps of a
  77.  * fired buffer to wait.
  78.  */
  79. void u_upload_unmap( struct u_upload_mgr *upload );
  80.  
  81. /**
  82.  * Sub-allocate new memory from the upload buffer.
  83.  *
  84.  * \param upload           Upload manager
  85.  * \param min_out_offset   Minimum offset that should be returned in out_offset.
  86.  * \param size             Size of the allocation.
  87.  * \param out_offset       Pointer to where the new buffer offset will be returned.
  88.  * \param outbuf           Pointer to where the upload buffer will be returned.
  89.  * \param ptr              Pointer to the allocated memory that is returned.
  90.  */
  91. enum pipe_error u_upload_alloc( struct u_upload_mgr *upload,
  92.                                 unsigned min_out_offset,
  93.                                 unsigned size,
  94.                                 unsigned *out_offset,
  95.                                 struct pipe_resource **outbuf,
  96.                                 void **ptr );
  97.  
  98.  
  99. /**
  100.  * Allocate and write data to the upload buffer.
  101.  *
  102.  * Same as u_upload_alloc, but in addition to that, it copies "data"
  103.  * to the pointer returned from u_upload_alloc.
  104.  */
  105. enum pipe_error u_upload_data( struct u_upload_mgr *upload,
  106.                                unsigned min_out_offset,
  107.                                unsigned size,
  108.                                const void *data,
  109.                                unsigned *out_offset,
  110.                                struct pipe_resource **outbuf);
  111.  
  112.  
  113. /**
  114.  * Allocate space in an upload buffer and copy an input buffer to it.
  115.  *
  116.  * Same as u_upload_data, except that the input data comes from a buffer
  117.  * instead of a user pointer.
  118.  */
  119. enum pipe_error u_upload_buffer( struct u_upload_mgr *upload,
  120.                                  unsigned min_out_offset,
  121.                                  unsigned offset,
  122.                                  unsigned size,
  123.                                  struct pipe_resource *inbuf,
  124.                                  unsigned *out_offset,
  125.                                  struct pipe_resource **outbuf);
  126.  
  127.  
  128.  
  129. #endif
  130.  
  131.