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

   1 #ifndef INTEL_BATCHBUFFER_H
   2 #define INTEL_BATCHBUFFER_H
   3
   4 #include "mtypes.h"
   5 #include "dri_bufmgr.h"
   6
   7 struct intel_context;
   8
   9 #define BATCH_SZ 16384
  10 #define BATCH_RESERVED 16
  11
  12 #define MAX_RELOCS 4096
  13
  14 #define INTEL_BATCH_NO_CLIPRECTS 0x1
  15 #define INTEL_BATCH_CLIPRECTS    0x2
  16
  17 struct buffer_reloc
  18 {
  19    dri_bo *buf;
  20    GLuint offset;
  21    GLuint delta;                /* not needed? */
  22    GLuint validate_flags;
  23 };
  24
  25 struct intel_batchbuffer
  26 {
  27    struct intel_context *intel;
  28
  29    dri_bo *buf;
  30    dri_fence *last_fence;
  31    GLuint flags;
  32
  33    drmBOList list;
  34    GLuint list_count;
  35    GLubyte *map;
  36    GLubyte *ptr;
  37
  38    struct buffer_reloc reloc[MAX_RELOCS];
  39    GLuint nr_relocs;
  40    GLuint size;
  41 };
  42
  43 struct intel_batchbuffer *intel_batchbuffer_alloc(struct intel_context
  44                                                   *intel);
  45
  46 void intel_batchbuffer_free(struct intel_batchbuffer *batch);
  47
  48
  49 void intel_batchbuffer_finish(struct intel_batchbuffer *batch);
  50
  51 void intel_batchbuffer_flush(struct intel_batchbuffer *batch);
  52
  53 void intel_batchbuffer_reset(struct intel_batchbuffer *batch);
  54
  55
  56 /* Unlike bmBufferData, this currently requires the buffer be mapped.
  57  * Consider it a convenience function wrapping multple
  58  * intel_buffer_dword() calls.
  59  */
  60 void intel_batchbuffer_data(struct intel_batchbuffer *batch,
  61                             const void *data, GLuint bytes, GLuint flags);
  62
  63 void intel_batchbuffer_release_space(struct intel_batchbuffer *batch,
  64                                      GLuint bytes);
  65
  66 GLboolean intel_batchbuffer_emit_reloc(struct intel_batchbuffer *batch,
  67                                        dri_bo *buffer,
  68                                        GLuint flags, GLuint offset);
  69
  70 /* Inline functions - might actually be better off with these
  71  * non-inlined.  Certainly better off switching all command packets to
  72  * be passed as structs rather than dwords, but that's a little bit of
  73  * work...
  74  */
  75 static INLINE GLuint
  76 intel_batchbuffer_space(struct intel_batchbuffer *batch)
  77 {
  78    return (batch->size - BATCH_RESERVED) - (batch->ptr - batch->map);
  79 }
  80
  81
  82 static INLINE void
  83 intel_batchbuffer_emit_dword(struct intel_batchbuffer *batch, GLuint dword)
  84 {
  85    assert(batch->map);
  86    assert(intel_batchbuffer_space(batch) >= 4);
  87    *(GLuint *) (batch->ptr) = dword;
  88    batch->ptr += 4;
  89 }
  90
  91 static INLINE void
  92 intel_batchbuffer_require_space(struct intel_batchbuffer *batch,
  93                                 GLuint sz, GLuint flags)
  94 {
  95    assert(sz < batch->size - 8);
  96    if (intel_batchbuffer_space(batch) < sz ||
  97        (batch->flags != 0 && flags != 0 && batch->flags != flags))
  98       intel_batchbuffer_flush(batch);
  99
 100    batch->flags |= flags;
 101 }
 102
 103 /* Here are the crusty old macros, to be removed:
 104  */
 105 #define BATCH_LOCALS
 106
 107 #define BEGIN_BATCH(n, flags) do {                              \
 108    assert(!intel->prim.flush);                                  \
 109    intel_batchbuffer_require_space(intel->batch, (n)*4, flags); \
 110 } while (0)
 111
 112 #define OUT_BATCH(d)  intel_batchbuffer_emit_dword(intel->batch, d)
 113
 114 #define OUT_RELOC(buf, flags, delta) do {                               \
 115    assert((delta) >= 0);                                                \
 116    intel_batchbuffer_emit_reloc(intel->batch, buf, flags, delta);       \
 117 } while (0)
 118
 119 #define ADVANCE_BATCH() do { } while(0)
 120
 121
 122 #endif