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
  14 struct intel_batchbuffer
  15 {
  16    struct intel_context *intel;
  17
  18    dri_bo *buf;
  19
  20    GLubyte *buffer;
  21
  22    GLubyte *map;
  23    GLubyte *ptr;
  24
  25    GLuint size;
  26
  27    /** Tracking of BEGIN_BATCH()/OUT_BATCH()/ADVANCE_BATCH() debugging */
  28    struct {
  29       GLuint total;
  30       GLubyte *start_ptr;
  31    } emit;
  32
  33    GLuint dirty_state;
  34    GLuint reserved_space;
  35 };
  36
  37 struct intel_batchbuffer *intel_batchbuffer_alloc(struct intel_context
  38                                                   *intel);
  39
  40 void intel_batchbuffer_free(struct intel_batchbuffer *batch);
  41
  42
  43 void _intel_batchbuffer_flush(struct intel_batchbuffer *batch,
  44                               const char *file, int line);
  45
  46 #define intel_batchbuffer_flush(batch) \
  47         _intel_batchbuffer_flush(batch, __FILE__, __LINE__)
  48
  49 void intel_batchbuffer_reset(struct intel_batchbuffer *batch);
  50
  51
  52 /* Unlike bmBufferData, this currently requires the buffer be mapped.
  53  * Consider it a convenience function wrapping multple
  54  * intel_buffer_dword() calls.
  55  */
  56 void intel_batchbuffer_data(struct intel_batchbuffer *batch,
  57                             const void *data, GLuint bytes);
  58
  59 void intel_batchbuffer_release_space(struct intel_batchbuffer *batch,
  60                                      GLuint bytes);
  61
  62 GLboolean intel_batchbuffer_emit_reloc(struct intel_batchbuffer *batch,
  63                                        dri_bo *buffer,
  64                                        uint32_t read_domains,
  65                                        uint32_t write_domain,
  66                                        uint32_t offset);
  67 GLboolean intel_batchbuffer_emit_reloc_fenced(struct intel_batchbuffer *batch,
  68                                               drm_intel_bo *buffer,
  69                                               uint32_t read_domains,
  70                                               uint32_t write_domain,
  71                                               uint32_t offset);
  72 void intel_batchbuffer_emit_mi_flush(struct intel_batchbuffer *batch);
  73
  74 /* Inline functions - might actually be better off with these
  75  * non-inlined.  Certainly better off switching all command packets to
  76  * be passed as structs rather than dwords, but that's a little bit of
  77  * work...
  78  */
  79 static INLINE GLint
  80 intel_batchbuffer_space(struct intel_batchbuffer *batch)
  81 {
  82    return (batch->size - batch->reserved_space) - (batch->ptr - batch->map);
  83 }
  84
  85
  86 static INLINE void
  87 intel_batchbuffer_emit_dword(struct intel_batchbuffer *batch, GLuint dword)
  88 {
  89    assert(batch->map);
  90    assert(intel_batchbuffer_space(batch) >= 4);
  91    *(GLuint *) (batch->ptr) = dword;
  92    batch->ptr += 4;
  93 }
  94
  95 static INLINE void
  96 intel_batchbuffer_require_space(struct intel_batchbuffer *batch,
  97                                 GLuint sz)
  98 {
  99    assert(sz < batch->size - 8);
 100    if (intel_batchbuffer_space(batch) < sz)
 101       intel_batchbuffer_flush(batch);
 102 }
 103
 104 static INLINE uint32_t float_as_int(float f)
 105 {
 106    union {
 107       float f;
 108       uint32_t d;
 109    } fi;
 110
 111    fi.f = f;
 112    return fi.d;
 113 }
 114
 115 /* Here are the crusty old macros, to be removed:
 116  */
 117 #define BATCH_LOCALS
 118
 119 #define BEGIN_BATCH(n) do {                             \
 120    intel_batchbuffer_require_space(intel->batch, (n)*4); \
 121    assert(intel->batch->emit.start_ptr == NULL);                        \
 122    intel->batch->emit.total = (n) * 4;                                  \
 123    intel->batch->emit.start_ptr = intel->batch->ptr;                    \
 124 } while (0)
 125
 126 #define OUT_BATCH(d) intel_batchbuffer_emit_dword(intel->batch, d)
 127 #define OUT_BATCH_F(f) intel_batchbuffer_emit_dword(intel->batch,       \
 128                                                     float_as_int(f))
 129
 130 #define OUT_RELOC(buf, read_domains, write_domain, delta) do {          \
 131    assert((unsigned) (delta) < buf->size);                              \
 132    intel_batchbuffer_emit_reloc(intel->batch, buf,                      \
 133                                 read_domains, write_domain, delta);     \
 134 } while (0)
 135 #define OUT_RELOC_FENCED(buf, read_domains, write_domain, delta) do {   \
 136    assert((unsigned) (delta) < buf->size);                              \
 137    intel_batchbuffer_emit_reloc_fenced(intel->batch, buf,               \
 138                                        read_domains, write_domain, delta); \
 139 } while (0)
 140
 141 #define ADVANCE_BATCH() do {                                            \
 142    unsigned int _n = intel->batch->ptr - intel->batch->emit.start_ptr;  \
 143    assert(intel->batch->emit.start_ptr != NULL);                        \
 144    if (_n != intel->batch->emit.total) {                                \
 145       fprintf(stderr, "ADVANCE_BATCH: %d of %d dwords emitted\n",       \
 146               _n, intel->batch->emit.total);                            \
 147       abort();                                                          \
 148    }                                                                    \
 149    intel->batch->emit.start_ptr = NULL;                                 \
 150 } while(0)
 151
 152 #endif