src/gallium/drivers/i915simple/i915_winsys.h

   1 /**************************************************************************
   2  *
   3  * Copyright 2007 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,
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  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  *
  26  **************************************************************************/
  27
  28 /**
  29  * \file
  30  * This is the interface that i915simple requires any window system
  31  * hosting it to implement.  This is the only include file in i915simple
  32  * which is public.
  33  *
  34  */
  35
  36 #ifndef I915_WINSYS_H
  37 #define I915_WINSYS_H
  38
  39
  40 #include "pipe/p_defines.h"
  41
  42
  43 /* Pipe drivers are (meant to be!) independent of both GL and the
  44  * window system.  The window system provides a buffer manager and a
  45  * set of additional hooks for things like command buffer submission,
  46  * etc.
  47  *
  48  * There clearly has to be some agreement between the window system
  49  * driver and the hardware driver about the format of command buffers,
  50  * etc.
  51  */
  52
  53 struct pipe_buffer;
  54 struct pipe_winsys;
  55
  56
  57 /**
  58  * Additional winsys interface for i915simple.
  59  *
  60  * It is an over-simple batchbuffer mechanism.  Will want to improve the
  61  * performance of this, perhaps based on the cmdstream stuff.  It
  62  * would be pretty impossible to implement swz on top of this
  63  * interface.
  64  *
  65  * Will also need additions/changes to implement static/dynamic
  66  * indirect state.
  67  */
  68 struct i915_winsys {
  69
  70    /**
  71     * Reserve space on batch buffer.
  72     *
  73     * Returns a null pointer if there is insufficient space in the batch buffer
  74     * to hold the requested number of dwords and relocations.
  75     *
  76     * The number of dwords should also include the number of relocations.
  77     */
  78    unsigned *(*batch_start)( struct i915_winsys *sws,
  79                              unsigned dwords,
  80                              unsigned relocs );
  81
  82    void (*batch_dword)( struct i915_winsys *sws,
  83                         unsigned dword );
  84
  85    /**
  86     * Emit a relocation to a buffer.
  87     *
  88     * Used not only when the buffer addresses are not pinned, but also to
  89     * ensure refered buffers will not be destroyed until the current batch
  90     * buffer execution is finished.
  91     *
  92     * The access flags is a combination of I915_BUFFER_ACCESS_WRITE and
  93     * I915_BUFFER_ACCESS_READ macros.
  94     */
  95    void (*batch_reloc)( struct i915_winsys *sws,
  96                         struct pipe_buffer *buf,
  97                         unsigned access_flags,
  98                         unsigned delta );
  99
 100    void (*batch_flush)( struct i915_winsys *sws );
 101    void (*batch_finish)( struct i915_winsys *sws );
 102 };
 103
 104 #define I915_BUFFER_ACCESS_WRITE   0x1
 105 #define I915_BUFFER_ACCESS_READ    0x2
 106
 107 #define I915_BUFFER_USAGE_LIT_VERTEX  (PIPE_BUFFER_USAGE_CUSTOM << 0)
 108
 109
 110 struct pipe_context *i915_create( struct pipe_winsys *,
 111                                   struct i915_winsys *,
 112                                   unsigned pci_id );
 113
 114
 115 #endif