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 #include "i915_debug.h"
  33
  34 struct i915_batchbuffer
  35 {
  36    struct pipe_buffer *buffer;
  37    struct i915_winsys *winsys;
  38
  39    unsigned char *map;
  40    unsigned char *ptr;
  41
  42    size_t size;
  43    size_t actual_size;
  44
  45    size_t relocs;
  46    size_t max_relocs;
  47 };
  48
  49 static INLINE boolean
  50 i915_batchbuffer_check( struct i915_batchbuffer *batch,
  51                         size_t dwords,
  52                         size_t relocs )
  53 {
  54    /** TODO JB: Check relocs */
  55    return dwords * 4 <= batch->size - (batch->ptr - batch->map);
  56 }
  57
  58 static INLINE size_t
  59 i915_batchbuffer_space( struct i915_batchbuffer *batch )
  60 {
  61    return batch->size - (batch->ptr - batch->map);
  62 }
  63
  64 static INLINE void
  65 i915_batchbuffer_dword( struct i915_batchbuffer *batch,
  66                         unsigned dword )
  67 {
  68    if (i915_batchbuffer_space(batch) < 4)
  69       return;
  70
  71    *(unsigned *)batch->ptr = dword;
  72    batch->ptr += 4;
  73 }
  74
  75 static INLINE void
  76 i915_batchbuffer_write( struct i915_batchbuffer *batch,
  77                         void *data,
  78                         size_t size )
  79 {
  80    if (i915_batchbuffer_space(batch) < size)
  81       return;
  82
  83    memcpy(data, batch->ptr, size);
  84    batch->ptr += size;
  85 }
  86
  87 static INLINE void
  88 i915_batchbuffer_reloc( struct i915_batchbuffer *batch,
  89                         struct pipe_buffer *buffer,
  90                         size_t flags,
  91                         size_t offset )
  92 {
  93    batch->winsys->batch_reloc( batch->winsys, buffer, flags, offset );
  94 }
  95
  96 static INLINE void
  97 i915_batchbuffer_flush( struct i915_batchbuffer *batch,
  98                         struct pipe_fence_handle **fence )
  99 {
 100    batch->winsys->batch_flush( batch->winsys, fence );
 101 }
 102
 103 #define BATCH_LOCALS
 104
 105 #define BEGIN_BATCH( dwords, relocs ) \
 106    (i915_batchbuffer_check( i915->batch, dwords, relocs ))
 107
 108 #define OUT_BATCH( dword ) \
 109    i915_batchbuffer_dword( i915->batch, dword )
 110
 111 #define OUT_RELOC( buf, flags, delta ) \
 112    i915_batchbuffer_reloc( i915->batch, buf, flags, delta )
 113
 114 #define ADVANCE_BATCH()
 115
 116 #define FLUSH_BATCH(fence) do {                         \
 117    if (0) i915_dump_batchbuffer( i915 );                \
 118    i915->winsys->batch_flush( i915->winsys, fence );    \
 119    i915->hardware_dirty = ~0;                           \
 120 } while (0)
 121
 122 #endif