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      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
    152