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

   1 #ifndef INTEL_BATCHBUFFER_H
   2 #define INTEL_BATCHBUFFER_H
   3
   4 #include "main/mtypes.h"
   5
   6 #include "intel_context.h"
   7 #include "intel_bufmgr.h"
   8 #include "intel_reg.h"
   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     * This will be upgraded to NO_LOOP_CLIPRECTS when there's a single
  24     * constant cliprect, as in DRI2 or FBO rendering.
  25     */
  26    LOOP_CLIPRECTS,
  27    /**
  28     * Batchbuffer contents contain drawing that should not be executed multiple
  29     * times.
  30     */
  31    NO_LOOP_CLIPRECTS,
  32    /**
  33     * Batchbuffer contents contain drawing that already handles cliprects, such
  34     * as 2D drawing to front/back/depth that doesn't respect DRAWING_RECTANGLE.
  35     *
  36     * Equivalent behavior to NO_LOOP_CLIPRECTS, but may not persist in batch
  37     * outside of LOCK/UNLOCK.  This is upgraded to just NO_LOOP_CLIPRECTS when
  38     * there's a constant cliprect, as in DRI2 or FBO rendering.
  39     */
  40    REFERENCES_CLIPRECTS
  41 };
  42
  43 struct intel_batchbuffer
  44 {
  45    struct intel_context *intel;
  46
  47    dri_bo *buf;
  48
  49    GLubyte *buffer;
  50
  51    GLubyte *map;
  52    GLubyte *ptr;
  53
  54    enum cliprect_mode cliprect_mode;
  55
  56    GLuint size;
  57
  58    GLuint dirty_state;
  59 };
  60
  61 struct intel_batchbuffer *intel_batchbuffer_alloc(struct intel_context
  62                                                   *intel);
  63
  64 void intel_batchbuffer_free(struct intel_batchbuffer *batch);
  65
  66
  67 void _intel_batchbuffer_flush(struct intel_batchbuffer *batch,
  68                               const char *file, int line);
  69
  70 #define intel_batchbuffer_flush(batch) \
  71         _intel_batchbuffer_flush(batch, __FILE__, __LINE__)
  72
  73 void intel_batchbuffer_reset(struct intel_batchbuffer *batch);
  74
  75
  76 /* Unlike bmBufferData, this currently requires the buffer be mapped.
  77  * Consider it a convenience function wrapping multple
  78  * intel_buffer_dword() calls.
  79  */
  80 void intel_batchbuffer_data(struct intel_batchbuffer *batch,
  81                             const void *data, GLuint bytes,
  82                             enum cliprect_mode cliprect_mode);
  83
  84 void intel_batchbuffer_release_space(struct intel_batchbuffer *batch,
  85                                      GLuint bytes);
  86
  87 GLboolean intel_batchbuffer_emit_reloc(struct intel_batchbuffer *batch,
  88                                        dri_bo *buffer,
  89                                        uint32_t read_domains,
  90                                        uint32_t write_domain,
  91                                        uint32_t offset);
  92
  93 /* Inline functions - might actually be better off with these
  94  * non-inlined.  Certainly better off switching all command packets to
  95  * be passed as structs rather than dwords, but that's a little bit of
  96  * work...
  97  */
  98 static INLINE GLint
  99 intel_batchbuffer_space(struct intel_batchbuffer *batch)
 100 {
 101    return (batch->size - BATCH_RESERVED) - (batch->ptr - batch->map);
 102 }
 103
 104
 105 static INLINE void
 106 intel_batchbuffer_emit_dword(struct intel_batchbuffer *batch, GLuint dword)
 107 {
 108    assert(batch->map);
 109    assert(intel_batchbuffer_space(batch) >= 4);
 110    *(GLuint *) (batch->ptr) = dword;
 111    batch->ptr += 4;
 112 }
 113
 114 static INLINE void
 115 intel_batchbuffer_require_space(struct intel_batchbuffer *batch,
 116                                 GLuint sz,
 117                                 enum cliprect_mode cliprect_mode)
 118 {
 119    assert(sz < batch->size - 8);
 120    if (intel_batchbuffer_space(batch) < sz)
 121       intel_batchbuffer_flush(batch);
 122
 123    if ((cliprect_mode == LOOP_CLIPRECTS ||
 124         cliprect_mode == REFERENCES_CLIPRECTS) &&
 125        batch->intel->constant_cliprect)
 126       cliprect_mode = NO_LOOP_CLIPRECTS;
 127
 128    if (cliprect_mode != IGNORE_CLIPRECTS) {
 129       if (batch->cliprect_mode == IGNORE_CLIPRECTS) {
 130          batch->cliprect_mode = cliprect_mode;
 131       } else {
 132          if (batch->cliprect_mode != cliprect_mode) {
 133             intel_batchbuffer_flush(batch);
 134             batch->cliprect_mode = cliprect_mode;
 135          }
 136       }
 137    }
 138 }
 139
 140 /* Here are the crusty old macros, to be removed:
 141  */
 142 #define BATCH_LOCALS
 143
 144 #define BEGIN_BATCH(n, cliprect_mode) do {                              \
 145    intel_batchbuffer_require_space(intel->batch, (n)*4, cliprect_mode); \
 146 } while (0)
 147
 148 #define OUT_BATCH(d)  intel_batchbuffer_emit_dword(intel->batch, d)
 149
 150 #define OUT_RELOC(buf, read_domains, write_domain, delta) do {          \
 151    assert((delta) >= 0);                                                \
 152    intel_batchbuffer_emit_reloc(intel->batch, buf,                      \
 153                                 read_domains, write_domain, delta);     \
 154 } while (0)
 155
 156 #define ADVANCE_BATCH() do { } while(0)
 157
 158
 159 static INLINE void
 160 intel_batchbuffer_emit_mi_flush(struct intel_batchbuffer *batch)
 161 {
 162    intel_batchbuffer_require_space(batch, 4, IGNORE_CLIPRECTS);
 163    intel_batchbuffer_emit_dword(batch, MI_FLUSH);
 164 }
 165
 166 #endif