src/mesa/drivers/dri/intel/intel_batchbuffer.h

   1 #ifndef INTEL_BATCHBUFFER_H
   2 #define INTEL_BATCHBUFFER_H
   3
   4 #include "mtypes.h"
   5
   6 #include "dri_bufmgr.h"
   7
   8 struct intel_context;
   9
  10 #define BATCH_SZ 16384
  11 #define BATCH_RESERVED 16
  12
  13 enum cliprect_mode {
  14    /**
  15     * Batchbuffer contents may be looped over per cliprect, but do not
  16     * require it.
  17     */
  18    IGNORE_CLIPRECTS,
  19    /**
  20     * Batchbuffer contents require looping over per cliprect at batch submit
  21     * time.
  22     */
  23    LOOP_CLIPRECTS,
  24    /**
  25     * Batchbuffer contents contain drawing that should not be executed multiple
  26     * times.
  27     */
  28    NO_LOOP_CLIPRECTS,
  29    /**
  30     * Batchbuffer contents contain drawing that already handles cliprects, such
  31     * as 2D drawing to front/back/depth that doesn't respect DRAWING_RECTANGLE.
  32     * Equivalent behavior to NO_LOOP_CLIPRECTS, but may not persist in batch
  33     * outside of LOCK/UNLOCK.
  34     */
  35    REFERENCES_CLIPRECTS
  36 };
  37
  38 struct intel_batchbuffer
  39 {
  40    struct intel_context *intel;
  41
  42    dri_bo *buf;
  43    dri_fence *last_fence;
  44
  45    GLubyte *map;
  46    GLubyte *ptr;
  47
  48    enum cliprect_mode cliprect_mode;
  49
  50    GLuint size;
  51
  52    GLuint dirty_state;
  53 };
  54
  55 struct intel_batchbuffer *intel_batchbuffer_alloc(struct intel_context
  56                                                   *intel);
  57
  58 void intel_batchbuffer_free(struct intel_batchbuffer *batch);
  59
  60
  61 void intel_batchbuffer_finish(struct intel_batchbuffer *batch);
  62
  63 void _intel_batchbuffer_flush(struct intel_batchbuffer *batch,
  64                               const char *file, int line);
  65
  66 #define intel_batchbuffer_flush(batch) \
  67         _intel_batchbuffer_flush(batch, __FILE__, __LINE__)
  68
  69 void intel_batchbuffer_reset(struct intel_batchbuffer *batch);
  70
  71
  72 /* Unlike bmBufferData, this currently requires the buffer be mapped.
  73  * Consider it a convenience function wrapping multple
  74  * intel_buffer_dword() calls.
  75  */
  76 void intel_batchbuffer_data(struct intel_batchbuffer *batch,
  77                             const void *data, GLuint bytes,
  78                             enum cliprect_mode cliprect_mode);
  79
  80 void intel_batchbuffer_release_space(struct intel_batchbuffer *batch,
  81                                      GLuint bytes);
  82
  83 GLboolean intel_batchbuffer_emit_reloc(struct intel_batchbuffer *batch,
  84                                        dri_bo *buffer,
  85                                        GLuint flags, GLuint offset);
  86
  87 /* Inline functions - might actually be better off with these
  88  * non-inlined.  Certainly better off switching all command packets to
  89  * be passed as structs rather than dwords, but that's a little bit of
  90  * work...
  91  */
  92 static INLINE GLuint
  93 intel_batchbuffer_space(struct intel_batchbuffer *batch)
  94 {
  95    return (batch->size - BATCH_RESERVED) - (batch->ptr - batch->map);
  96 }
  97
  98
  99 static INLINE void
 100 intel_batchbuffer_emit_dword(struct intel_batchbuffer *batch, GLuint dword)
 101 {
 102    assert(batch->map);
 103    assert(intel_batchbuffer_space(batch) >= 4);
 104    *(GLuint *) (batch->ptr) = dword;
 105    batch->ptr += 4;
 106 }
 107
 108 static INLINE void
 109 intel_batchbuffer_require_space(struct intel_batchbuffer *batch,
 110                                 GLuint sz,
 111                                 enum cliprect_mode cliprect_mode)
 112 {
 113    assert(sz < batch->size - 8);
 114    if (intel_batchbuffer_space(batch) < sz)
 115       intel_batchbuffer_flush(batch);
 116
 117    if (cliprect_mode != IGNORE_CLIPRECTS) {
 118       if (batch->cliprect_mode == IGNORE_CLIPRECTS) {
 119          batch->cliprect_mode = cliprect_mode;
 120       } else {
 121          if (batch->cliprect_mode != cliprect_mode) {
 122             intel_batchbuffer_flush(batch);
 123             batch->cliprect_mode = cliprect_mode;
 124          }
 125       }
 126    }
 127 }
 128
 129 /* Here are the crusty old macros, to be removed:
 130  */
 131 #define BATCH_LOCALS
 132
 133 #define BEGIN_BATCH(n, cliprect_mode) do {                              \
 134    intel_batchbuffer_require_space(intel->batch, (n)*4, cliprect_mode); \
 135 } while (0)
 136
 137 #define OUT_BATCH(d)  intel_batchbuffer_emit_dword(intel->batch, d)
 138
 139 #define OUT_RELOC(buf, cliprect_mode, delta) do {                       \
 140    assert((delta) >= 0);                                                \
 141    intel_batchbuffer_emit_reloc(intel->batch, buf, cliprect_mode, delta); \
 142 } while (0)
 143
 144 #define ADVANCE_BATCH() do { } while(0)
 145
 146
 147 #endif