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
  44    GLubyte *map;
  45    GLubyte *ptr;
  46
  47    enum cliprect_mode cliprect_mode;
  48
  49    GLuint size;
  50
  51    GLuint dirty_state;
  52 };
  53
  54 struct intel_batchbuffer *intel_batchbuffer_alloc(struct intel_context
  55                                                   *intel);
  56
  57 void intel_batchbuffer_free(struct intel_batchbuffer *batch);
  58
  59
  60 void _intel_batchbuffer_flush(struct intel_batchbuffer *batch,
  61                               const char *file, int line);
  62
  63 #define intel_batchbuffer_flush(batch) \
  64         _intel_batchbuffer_flush(batch, __FILE__, __LINE__)
  65
  66 void intel_batchbuffer_reset(struct intel_batchbuffer *batch);
  67
  68
  69 /* Unlike bmBufferData, this currently requires the buffer be mapped.
  70  * Consider it a convenience function wrapping multple
  71  * intel_buffer_dword() calls.
  72  */
  73 void intel_batchbuffer_data(struct intel_batchbuffer *batch,
  74                             const void *data, GLuint bytes,
  75                             enum cliprect_mode cliprect_mode);
  76
  77 void intel_batchbuffer_release_space(struct intel_batchbuffer *batch,
  78                                      GLuint bytes);
  79
  80 GLboolean intel_batchbuffer_emit_reloc(struct intel_batchbuffer *batch,
  81                                        dri_bo *buffer,
  82                                        uint32_t read_domains,
  83                                        uint32_t write_domain,
  84                                        uint32_t offset);
  85
  86 /* Inline functions - might actually be better off with these
  87  * non-inlined.  Certainly better off switching all command packets to
  88  * be passed as structs rather than dwords, but that's a little bit of
  89  * work...
  90  */
  91 static INLINE GLint
  92 intel_batchbuffer_space(struct intel_batchbuffer *batch)
  93 {
  94    return (batch->size - BATCH_RESERVED) - (batch->ptr - batch->map);
  95 }
  96
  97
  98 static INLINE void
  99 intel_batchbuffer_emit_dword(struct intel_batchbuffer *batch, GLuint dword)
 100 {
 101    assert(batch->map);
 102    assert(intel_batchbuffer_space(batch) >= 4);
 103    *(GLuint *) (batch->ptr) = dword;
 104    batch->ptr += 4;
 105 }
 106
 107 static INLINE void
 108 intel_batchbuffer_require_space(struct intel_batchbuffer *batch,
 109                                 GLuint sz,
 110                                 enum cliprect_mode cliprect_mode)
 111 {
 112    assert(sz < batch->size - 8);
 113    if (intel_batchbuffer_space(batch) < sz)
 114       intel_batchbuffer_flush(batch);
 115
 116    if (cliprect_mode != IGNORE_CLIPRECTS) {
 117       if (batch->cliprect_mode == IGNORE_CLIPRECTS) {
 118          batch->cliprect_mode = cliprect_mode;
 119       } else {
 120          if (batch->cliprect_mode != cliprect_mode)
 121             intel_batchbuffer_flush(batch);
 122       }
 123    }
 124 }
 125
 126 /* Here are the crusty old macros, to be removed:
 127  */
 128 #define BATCH_LOCALS
 129
 130 #define BEGIN_BATCH(n, cliprect_mode) do {                              \
 131    intel_batchbuffer_require_space(intel->batch, (n)*4, cliprect_mode); \
 132 } while (0)
 133
 134 #define OUT_BATCH(d)  intel_batchbuffer_emit_dword(intel->batch, d)
 135
 136 #define OUT_RELOC(buf, read_domains, write_domain, delta) do {          \
 137    assert((delta) >= 0);                                                \
 138    intel_batchbuffer_emit_reloc(intel->batch, buf,                      \
 139                                 read_domains, write_domain, delta);     \
 140 } while (0)
 141
 142 #define ADVANCE_BATCH() do { } while(0)
 143
 144
 145 #endif