intel_batchbuffer.h 5.4 KB
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#ifndef INTEL_BATCHBUFFER_H
#define INTEL_BATCHBUFFER_H

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#include "main/mtypes.h"
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#include "brw_context.h"
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#include "brw_bufmgr.h"
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#ifdef __cplusplus
extern "C" {
#endif

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/* The kernel assumes batchbuffers are smaller than 256kB. */
#define MAX_BATCH_SIZE (256 * 1024)

/* 3DSTATE_BINDING_TABLE_POINTERS has a U16 offset from Surface State Base
 * Address, which means that we can't put binding tables beyond 64kB.  This
 * effectively limits the maximum statebuffer size to 64kB.
 */
#define MAX_STATE_SIZE (64 * 1024)

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struct intel_batchbuffer;

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void intel_batchbuffer_init(struct brw_context *brw);
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void intel_batchbuffer_free(struct intel_batchbuffer *batch);
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void intel_batchbuffer_save_state(struct brw_context *brw);
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bool intel_batchbuffer_saved_state_is_empty(struct brw_context *brw);
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void intel_batchbuffer_reset_to_saved(struct brw_context *brw);
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void intel_batchbuffer_require_space(struct brw_context *brw, GLuint sz);
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int _intel_batchbuffer_flush_fence(struct brw_context *brw,
                                   int in_fence_fd, int *out_fence_fd,
                                   const char *file, int line);
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void intel_batchbuffer_maybe_noop(struct brw_context *brw);
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#define intel_batchbuffer_flush(brw) \
   _intel_batchbuffer_flush_fence((brw), -1, NULL, __FILE__, __LINE__)
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#define intel_batchbuffer_flush_fence(brw, in_fence_fd, out_fence_fd) \
   _intel_batchbuffer_flush_fence((brw), (in_fence_fd), (out_fence_fd), \
                                  __FILE__, __LINE__)
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/* Unlike bmBufferData, this currently requires the buffer be mapped.
 * Consider it a convenience function wrapping multple
 * intel_buffer_dword() calls.
 */
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void intel_batchbuffer_data(struct brw_context *brw,
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                            const void *data, GLuint bytes);
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static inline bool
brw_batch_has_aperture_space(struct brw_context *brw, uint64_t extra_space)
{
   return brw->batch.aperture_space + extra_space <=
          brw->screen->aperture_threshold;
}
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bool brw_batch_references(struct intel_batchbuffer *batch, struct brw_bo *bo);
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#define RELOC_WRITE EXEC_OBJECT_WRITE
#define RELOC_NEEDS_GGTT EXEC_OBJECT_NEEDS_GTT
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/* Inverted meaning, but using the same bit...emit_reloc will flip it. */
#define RELOC_32BIT EXEC_OBJECT_SUPPORTS_48B_ADDRESS
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void brw_use_pinned_bo(struct intel_batchbuffer *batch, struct brw_bo *bo,
                       unsigned writeable_flag);

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uint64_t brw_batch_reloc(struct intel_batchbuffer *batch,
                         uint32_t batch_offset,
                         struct brw_bo *target,
                         uint32_t target_offset,
                         unsigned flags);
uint64_t brw_state_reloc(struct intel_batchbuffer *batch,
                         uint32_t batch_offset,
                         struct brw_bo *target,
                         uint32_t target_offset,
                         unsigned flags);
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#define USED_BATCH(_batch) \
   ((uintptr_t)((_batch).map_next - (_batch).batch.map))
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static inline uint32_t float_as_int(float f)
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{
   union {
      float f;
      uint32_t d;
   } fi;

   fi.f = f;
   return fi.d;
}

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static inline void
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intel_batchbuffer_begin(struct brw_context *brw, int n)
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{
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   intel_batchbuffer_require_space(brw, n * 4);
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#ifdef DEBUG
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   brw->batch.emit = USED_BATCH(brw->batch);
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   brw->batch.total = n;
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#endif
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}
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static inline void
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intel_batchbuffer_advance(struct brw_context *brw)
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{
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#ifdef DEBUG
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   struct intel_batchbuffer *batch = &brw->batch;
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   unsigned int _n = USED_BATCH(*batch) - batch->emit;
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   assert(batch->total != 0);
   if (_n != batch->total) {
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      fprintf(stderr, "ADVANCE_BATCH: %d of %d dwords emitted\n",
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	      _n, batch->total);
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      abort();
   }
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   batch->total = 0;
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#else
   (void) brw;
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#endif
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}

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static inline bool
brw_ptr_in_state_buffer(struct intel_batchbuffer *batch, void *p)
{
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   return (char *) p >= (char *) batch->state.map &&
          (char *) p < (char *) batch->state.map + batch->state.bo->size;
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}

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#define BEGIN_BATCH(n) do {                            \
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   intel_batchbuffer_begin(brw, (n));                  \
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   uint32_t *__map = brw->batch.map_next;              \
   brw->batch.map_next += (n)

#define BEGIN_BATCH_BLT(n) do {                        \
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   assert(brw->screen->devinfo.gen < 6);               \
   intel_batchbuffer_begin(brw, (n));                  \
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   uint32_t *__map = brw->batch.map_next;              \
   brw->batch.map_next += (n)

#define OUT_BATCH(d) *__map++ = (d)
#define OUT_BATCH_F(f) OUT_BATCH(float_as_int((f)))

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#define OUT_RELOC(buf, flags, delta) do {          \
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   uint32_t __offset = (__map - brw->batch.batch.map) * 4;              \
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   uint32_t reloc =                                                     \
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      brw_batch_reloc(&brw->batch, __offset, (buf), (delta), (flags));  \
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   OUT_BATCH(reloc);                                                    \
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} while (0)
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/* Handle 48-bit address relocations for Gen8+ */
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#define OUT_RELOC64(buf, flags, delta) do {        \
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   uint32_t __offset = (__map - brw->batch.batch.map) * 4;              \
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   uint64_t reloc64 =                                                   \
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      brw_batch_reloc(&brw->batch, __offset, (buf), (delta), (flags));  \
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   OUT_BATCH(reloc64);                                                  \
   OUT_BATCH(reloc64 >> 32);                                            \
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} while (0)

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#define ADVANCE_BATCH()                  \
   assert(__map == brw->batch.map_next); \
   intel_batchbuffer_advance(brw);       \
} while (0)
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#ifdef __cplusplus
}
#endif

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#endif