src/mesa/drivers/dri/i915/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 /**
  11  * Number of bytes to reserve for commands necessary to complete a batch.
  12  *
  13  * This includes:
  14  * - MI_BATCHBUFFER_END (4 bytes)
  15  * - Optional MI_NOOP for ensuring the batch length is qword aligned (4 bytes)
  16  * - Any state emitted by vtbl->finish_batch():
  17  *   - Gen4-5 record ending occlusion query values (4 * 4 = 16 bytes)
  18  */
  19 #define BATCH_RESERVED 24
  20
  21 struct intel_batchbuffer;
  22
  23 void intel_batchbuffer_init(struct intel_context *intel);
  24 void intel_batchbuffer_free(struct intel_context *intel);
  25
  26 int _intel_batchbuffer_flush(struct intel_context *intel,
  27                              const char *file, int line);
  28
  29 #define intel_batchbuffer_flush(intel) \
  30         _intel_batchbuffer_flush(intel, __FILE__, __LINE__)
  31
  32
  33
  34 /* Unlike bmBufferData, this currently requires the buffer be mapped.
  35  * Consider it a convenience function wrapping multple
  36  * intel_buffer_dword() calls.
  37  */
  38 void intel_batchbuffer_data(struct intel_context *intel,
  39                             const void *data, GLuint bytes);
  40
  41 bool intel_batchbuffer_emit_reloc(struct intel_context *intel,
  42                                        drm_intel_bo *buffer,
  43                                        uint32_t read_domains,
  44                                        uint32_t write_domain,
  45                                        uint32_t offset);
  46 bool intel_batchbuffer_emit_reloc_fenced(struct intel_context *intel,
  47                                               drm_intel_bo *buffer,
  48                                               uint32_t read_domains,
  49                                               uint32_t write_domain,
  50                                               uint32_t offset);
  51 void intel_batchbuffer_emit_mi_flush(struct intel_context *intel);
  52
  53 static inline uint32_t float_as_int(float f)
  54 {
  55    union {
  56       float f;
  57       uint32_t d;
  58    } fi;
  59
  60    fi.f = f;
  61    return fi.d;
  62 }
  63
  64 /* Inline functions - might actually be better off with these
  65  * non-inlined.  Certainly better off switching all command packets to
  66  * be passed as structs rather than dwords, but that's a little bit of
  67  * work...
  68  */
  69 static inline unsigned
  70 intel_batchbuffer_space(struct intel_context *intel)
  71 {
  72    return (intel->batch.bo->size - intel->batch.reserved_space)
  73       - intel->batch.used*4;
  74 }
  75
  76
  77 static inline void
  78 intel_batchbuffer_emit_dword(struct intel_context *intel, GLuint dword)
  79 {
  80 #ifdef DEBUG
  81    assert(intel_batchbuffer_space(intel) >= 4);
  82 #endif
  83    intel->batch.map[intel->batch.used++] = dword;
  84 }
  85
  86 static inline void
  87 intel_batchbuffer_emit_float(struct intel_context *intel, float f)
  88 {
  89    intel_batchbuffer_emit_dword(intel, float_as_int(f));
  90 }
  91
  92 static inline void
  93 intel_batchbuffer_require_space(struct intel_context *intel,
  94                                 GLuint sz)
  95 {
  96 #ifdef DEBUG
  97    assert(sz < intel->maxBatchSize - BATCH_RESERVED);
  98 #endif
  99    if (intel_batchbuffer_space(intel) < sz)
 100       intel_batchbuffer_flush(intel);
 101 }
 102
 103 static inline void
 104 intel_batchbuffer_begin(struct intel_context *intel, int n)
 105 {
 106    intel_batchbuffer_require_space(intel, n * 4);
 107
 108    intel->batch.emit = intel->batch.used;
 109 #ifdef DEBUG
 110    intel->batch.total = n;
 111 #endif
 112 }
 113
 114 static inline void
 115 intel_batchbuffer_advance(struct intel_context *intel)
 116 {
 117 #ifdef DEBUG
 118    struct intel_batchbuffer *batch = &intel->batch;
 119    unsigned int _n = batch->used - batch->emit;
 120    assert(batch->total != 0);
 121    if (_n != batch->total) {
 122       fprintf(stderr, "ADVANCE_BATCH: %d of %d dwords emitted\n",
 123               _n, batch->total);
 124       abort();
 125    }
 126    batch->total = 0;
 127 #else
 128    (void) intel;
 129 #endif
 130 }
 131
 132 /* Here are the crusty old macros, to be removed:
 133  */
 134 #define BATCH_LOCALS
 135
 136 #define BEGIN_BATCH(n) intel_batchbuffer_begin(intel, n)
 137 #define OUT_BATCH(d) intel_batchbuffer_emit_dword(intel, d)
 138 #define OUT_BATCH_F(f) intel_batchbuffer_emit_float(intel,f)
 139 #define OUT_RELOC(buf, read_domains, write_domain, delta) do {          \
 140    intel_batchbuffer_emit_reloc(intel, buf,                     \
 141                                 read_domains, write_domain, delta);     \
 142 } while (0)
 143 #define OUT_RELOC_FENCED(buf, read_domains, write_domain, delta) do {   \
 144    intel_batchbuffer_emit_reloc_fenced(intel, buf,              \
 145                                        read_domains, write_domain, delta); \
 146 } while (0)
 147
 148 #define ADVANCE_BATCH() intel_batchbuffer_advance(intel);
 149 #define CACHED_BATCH() intel_batchbuffer_cached_advance(intel);
 150
 151 #endif