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 #include "intel_reg.h"
   8
   9 struct intel_context;
  10
  11 #define BATCH_SZ 16384
  12 #define BATCH_RESERVED 16
  13
  14 enum cliprect_mode {
  15    /**
  16     * Batchbuffer contents may be looped over per cliprect, but do not
  17     * require it.
  18     */
  19    IGNORE_CLIPRECTS,
  20    /**
  21     * Batchbuffer contents require looping over per cliprect at batch submit
  22     * time.
  23     */
  24    LOOP_CLIPRECTS,
  25    /**
  26     * Batchbuffer contents contain drawing that should not be executed multiple
  27     * times.
  28     */
  29    NO_LOOP_CLIPRECTS,
  30    /**
  31     * Batchbuffer contents contain drawing that already handles cliprects, such
  32     * as 2D drawing to front/back/depth that doesn't respect DRAWING_RECTANGLE.
  33     * Equivalent behavior to NO_LOOP_CLIPRECTS, but may not persist in batch
  34     * outside of LOCK/UNLOCK.
  35     */
  36    REFERENCES_CLIPRECTS
  37 };
  38
  39 struct intel_batchbuffer
  40 {
  41    struct intel_context *intel;
  42
  43    dri_bo *buf;
  44
  45    GLubyte *buffer;
  46
  47    GLubyte *map;
  48    GLubyte *ptr;
  49
  50    enum cliprect_mode cliprect_mode;
  51
  52    GLuint size;
  53
  54    GLuint dirty_state;
  55 };
  56
  57 struct intel_batchbuffer *intel_batchbuffer_alloc(struct intel_context
  58                                                   *intel);
  59
  60 void intel_batchbuffer_free(struct intel_batchbuffer *batch);
  61
  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                                        uint32_t read_domains,
  86                                        uint32_t write_domain,
  87                                        uint32_t offset);
  88
  89 /* Inline functions - might actually be better off with these
  90  * non-inlined.  Certainly better off switching all command packets to
  91  * be passed as structs rather than dwords, but that's a little bit of
  92  * work...
  93  */
  94 static INLINE GLint
  95 intel_batchbuffer_space(struct intel_batchbuffer *batch)
  96 {
  97    return (batch->size - BATCH_RESERVED) - (batch->ptr - batch->map);
  98 }
  99
 100
 101 static INLINE void
 102 intel_batchbuffer_emit_dword(struct intel_batchbuffer *batch, GLuint dword)
 103 {
 104    assert(batch->map);
 105    assert(intel_batchbuffer_space(batch) >= 4);
 106    *(GLuint *) (batch->ptr) = dword;
 107    batch->ptr += 4;
 108 }
 109
 110 static INLINE void
 111 intel_batchbuffer_require_space(struct intel_batchbuffer *batch,
 112                                 GLuint sz,
 113                                 enum cliprect_mode cliprect_mode)
 114 {
 115    assert(sz < batch->size - 8);
 116    if (intel_batchbuffer_space(batch) < sz)
 117       intel_batchbuffer_flush(batch);
 118
 119    if (cliprect_mode != IGNORE_CLIPRECTS) {
 120       if (batch->cliprect_mode == IGNORE_CLIPRECTS) {
 121          batch->cliprect_mode = cliprect_mode;
 122       } else {
 123          if (batch->cliprect_mode != cliprect_mode)
 124             intel_batchbuffer_flush(batch);
 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, read_domains, write_domain, delta) do {          \
 140    assert((delta) >= 0);                                                \
 141    intel_batchbuffer_emit_reloc(intel->batch, buf,                      \
 142                                 read_domains, write_domain, delta);     \
 143 } while (0)
 144
 145 #define ADVANCE_BATCH() do { } while(0)
 146
 147
 148 static INLINE void
 149 intel_batchbuffer_emit_mi_flush(struct intel_batchbuffer *batch)
 150 {
 151    intel_batchbuffer_require_space(batch, 4, IGNORE_CLIPRECTS);
 152    intel_batchbuffer_emit_dword(batch, MI_FLUSH);
 153 }
 154
 155 #endif