src/gallium/drivers/i915simple/i915_batch.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,
  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 #ifndef I915_BATCH_H
  29 #define I915_BATCH_H
  30
  31 #include "i915_winsys.h"
  32
  33 struct i915_batchbuffer
  34 {
  35    struct pipe_buffer *buffer;
  36    struct i915_winsys *winsys;
  37
  38    unsigned char *map;
  39    unsigned char *ptr;
  40
  41    size_t size;
  42    size_t actual_size;
  43
  44    size_t relocs;
  45    size_t max_relocs;
  46 };
  47
  48 static INLINE boolean
  49 i915_batchbuffer_check( struct i915_batchbuffer *batch,
  50                         size_t dwords,
  51                         size_t relocs )
  52 {
  53    /** TODO JB: Check relocs */
  54    return dwords * 4 <= batch->size - (batch->ptr - batch->map);
  55 }
  56
  57 static INLINE size_t
  58 i915_batchbuffer_space( struct i915_batchbuffer *batch )
  59 {
  60    return batch->size - (batch->ptr - batch->map);
  61 }
  62
  63 static INLINE void
  64 i915_batchbuffer_dword( struct i915_batchbuffer *batch,
  65                         unsigned dword )
  66 {
  67    if (i915_batchbuffer_space(batch) < 4)
  68       return;
  69
  70    *(unsigned *)batch->ptr = dword;
  71    batch->ptr += 4;
  72 }
  73
  74 static INLINE void
  75 i915_batchbuffer_write( struct i915_batchbuffer *batch,
  76                         void *data,
  77                         size_t size )
  78 {
  79    if (i915_batchbuffer_space(batch) < size)
  80       return;
  81
  82    memcpy(data, batch->ptr, size);
  83    batch->ptr += size;
  84 }
  85
  86 static INLINE void
  87 i915_batchbuffer_reloc( struct i915_batchbuffer *batch,
  88                         struct pipe_buffer *buffer,
  89                         size_t flags,
  90                         size_t offset )
  91 {
  92    batch->winsys->batch_reloc( batch->winsys, buffer, flags, offset );
  93 }
  94
  95 static INLINE void
  96 i915_batchbuffer_flush( struct i915_batchbuffer *batch,
  97                         struct pipe_fence_handle **fence )
  98 {
  99    batch->winsys->batch_flush( batch->winsys, fence );
 100 }
 101
 102 #define BEGIN_BATCH( dwords, relocs ) \
 103    (i915_batchbuffer_check( i915->batch, dwords, relocs ))
 104
 105 #define OUT_BATCH( dword ) \
 106    i915_batchbuffer_dword( i915->batch, dword )
 107
 108 #define OUT_RELOC( buf, flags, delta ) \
 109    i915_batchbuffer_reloc( i915->batch, buf, flags, delta )
 110
 111 #define FLUSH_BATCH(fence) do {                         \
 112    i915->winsys->batch_flush( i915->winsys, fence );    \
 113    i915->hardware_dirty = ~0;                           \
 114 } while (0)
 115
 116 #endif