src/mesa/drivers/dri/i965/intel_batchbuffer.h

   1 #ifndef INTEL_BATCHBUFFER_H
   2 #define INTEL_BATCHBUFFER_H
   3
   4 #include "main/mtypes.h"
   5
   6 #include "brw_context.h"
   7 #include "brw_bufmgr.h"
   8
   9 #ifdef __cplusplus
  10 extern "C" {
  11 #endif
  12
  13 /* The kernel assumes batchbuffers are smaller than 256kB. */
  14 #define MAX_BATCH_SIZE (256 * 1024)
  15
  16 /* 3DSTATE_BINDING_TABLE_POINTERS has a U16 offset from Surface State Base
  17  * Address, which means that we can't put binding tables beyond 64kB.  This
  18  * effectively limits the maximum statebuffer size to 64kB.
  19  */
  20 #define MAX_STATE_SIZE (64 * 1024)
  21
  22 struct intel_batchbuffer;
  23
  24 void intel_batchbuffer_init(struct brw_context *brw);
  25 void intel_batchbuffer_free(struct intel_batchbuffer *batch);
  26 void intel_batchbuffer_save_state(struct brw_context *brw);
  27 bool intel_batchbuffer_saved_state_is_empty(struct brw_context *brw);
  28 void intel_batchbuffer_reset_to_saved(struct brw_context *brw);
  29 void intel_batchbuffer_require_space(struct brw_context *brw, GLuint sz);
  30 int _intel_batchbuffer_flush_fence(struct brw_context *brw,
  31                                    int in_fence_fd, int *out_fence_fd,
  32                                    const char *file, int line);
  33 void intel_batchbuffer_maybe_noop(struct brw_context *brw);
  34
  35 #define intel_batchbuffer_flush(brw) \
  36    _intel_batchbuffer_flush_fence((brw), -1, NULL, __FILE__, __LINE__)
  37
  38 #define intel_batchbuffer_flush_fence(brw, in_fence_fd, out_fence_fd) \
  39    _intel_batchbuffer_flush_fence((brw), (in_fence_fd), (out_fence_fd), \
  40                                   __FILE__, __LINE__)
  41
  42 /* Unlike bmBufferData, this currently requires the buffer be mapped.
  43  * Consider it a convenience function wrapping multple
  44  * intel_buffer_dword() calls.
  45  */
  46 void intel_batchbuffer_data(struct brw_context *brw,
  47                             const void *data, GLuint bytes);
  48
  49 static inline bool
  50 brw_batch_has_aperture_space(struct brw_context *brw, uint64_t extra_space)
  51 {
  52    return brw->batch.aperture_space + extra_space <=
  53           brw->screen->aperture_threshold;
  54 }
  55
  56 bool brw_batch_references(struct intel_batchbuffer *batch, struct brw_bo *bo);
  57
  58 #define RELOC_WRITE EXEC_OBJECT_WRITE
  59 #define RELOC_NEEDS_GGTT EXEC_OBJECT_NEEDS_GTT
  60 /* Inverted meaning, but using the same bit...emit_reloc will flip it. */
  61 #define RELOC_32BIT EXEC_OBJECT_SUPPORTS_48B_ADDRESS
  62
  63 void brw_use_pinned_bo(struct intel_batchbuffer *batch, struct brw_bo *bo,
  64                        unsigned writeable_flag);
  65
  66 uint64_t brw_batch_reloc(struct intel_batchbuffer *batch,
  67                          uint32_t batch_offset,
  68                          struct brw_bo *target,
  69                          uint32_t target_offset,
  70                          unsigned flags);
  71 uint64_t brw_state_reloc(struct intel_batchbuffer *batch,
  72                          uint32_t batch_offset,
  73                          struct brw_bo *target,
  74                          uint32_t target_offset,
  75                          unsigned flags);
  76
  77 #define USED_BATCH(_batch) \
  78    ((uintptr_t)((_batch).map_next - (_batch).batch.map))
  79
  80 static inline uint32_t float_as_int(float f)
  81 {
  82    union {
  83       float f;
  84       uint32_t d;
  85    } fi;
  86
  87    fi.f = f;
  88    return fi.d;
  89 }
  90
  91 static inline void
  92 intel_batchbuffer_begin(struct brw_context *brw, int n)
  93 {
  94    intel_batchbuffer_require_space(brw, n * 4);
  95
  96 #ifdef DEBUG
  97    brw->batch.emit = USED_BATCH(brw->batch);
  98    brw->batch.total = n;
  99 #endif
 100 }
 101
 102 static inline void
 103 intel_batchbuffer_advance(struct brw_context *brw)
 104 {
 105 #ifdef DEBUG
 106    struct intel_batchbuffer *batch = &brw->batch;
 107    unsigned int _n = USED_BATCH(*batch) - batch->emit;
 108    assert(batch->total != 0);
 109    if (_n != batch->total) {
 110       fprintf(stderr, "ADVANCE_BATCH: %d of %d dwords emitted\n",
 111               _n, batch->total);
 112       abort();
 113    }
 114    batch->total = 0;
 115 #else
 116    (void) brw;
 117 #endif
 118 }
 119
 120 static inline bool
 121 brw_ptr_in_state_buffer(struct intel_batchbuffer *batch, void *p)
 122 {
 123    return (char *) p >= (char *) batch->state.map &&
 124           (char *) p < (char *) batch->state.map + batch->state.bo->size;
 125 }
 126
 127 #define BEGIN_BATCH(n) do {                            \
 128    intel_batchbuffer_begin(brw, (n));                  \
 129    uint32_t *__map = brw->batch.map_next;              \
 130    brw->batch.map_next += (n)
 131
 132 #define BEGIN_BATCH_BLT(n) do {                        \
 133    assert(brw->screen->devinfo.gen < 6);               \
 134    intel_batchbuffer_begin(brw, (n));                  \
 135    uint32_t *__map = brw->batch.map_next;              \
 136    brw->batch.map_next += (n)
 137
 138 #define OUT_BATCH(d) *__map++ = (d)
 139 #define OUT_BATCH_F(f) OUT_BATCH(float_as_int((f)))
 140
 141 #define OUT_RELOC(buf, flags, delta) do {          \
 142    uint32_t __offset = (__map - brw->batch.batch.map) * 4;              \
 143    uint32_t reloc =                                                     \
 144       brw_batch_reloc(&brw->batch, __offset, (buf), (delta), (flags));  \
 145    OUT_BATCH(reloc);                                                    \
 146 } while (0)
 147
 148 /* Handle 48-bit address relocations for Gen8+ */
 149 #define OUT_RELOC64(buf, flags, delta) do {        \
 150    uint32_t __offset = (__map - brw->batch.batch.map) * 4;              \
 151    uint64_t reloc64 =                                                   \
 152       brw_batch_reloc(&brw->batch, __offset, (buf), (delta), (flags));  \
 153    OUT_BATCH(reloc64);                                                  \
 154    OUT_BATCH(reloc64 >> 32);                                            \
 155 } while (0)
 156
 157 #define ADVANCE_BATCH()                  \
 158    assert(__map == brw->batch.map_next); \
 159    intel_batchbuffer_advance(brw);       \
 160 } while (0)
 161
 162 #ifdef __cplusplus
 163 }
 164 #endif
 165
 166 #endif