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 void intel_batchbuffer_reset_to_saved(struct brw_context *brw);
  28 void intel_batchbuffer_require_space(struct brw_context *brw, GLuint sz);
  29 int _intel_batchbuffer_flush_fence(struct brw_context *brw,
  30                                    int in_fence_fd, int *out_fence_fd,
  31                                    const char *file, int line);
  32
  33 #define intel_batchbuffer_flush(brw) \
  34    _intel_batchbuffer_flush_fence((brw), -1, NULL, __FILE__, __LINE__)
  35
  36 #define intel_batchbuffer_flush_fence(brw, in_fence_fd, out_fence_fd) \
  37    _intel_batchbuffer_flush_fence((brw), (in_fence_fd), (out_fence_fd), \
  38                                   __FILE__, __LINE__)
  39
  40 /* Unlike bmBufferData, this currently requires the buffer be mapped.
  41  * Consider it a convenience function wrapping multple
  42  * intel_buffer_dword() calls.
  43  */
  44 void intel_batchbuffer_data(struct brw_context *brw,
  45                             const void *data, GLuint bytes);
  46
  47 bool brw_batch_has_aperture_space(struct brw_context *brw,
  48                                   unsigned extra_space_in_bytes);
  49
  50 bool brw_batch_references(struct intel_batchbuffer *batch, struct brw_bo *bo);
  51
  52 #define RELOC_WRITE EXEC_OBJECT_WRITE
  53 #define RELOC_NEEDS_GGTT EXEC_OBJECT_NEEDS_GTT
  54 /* Inverted meaning, but using the same bit...emit_reloc will flip it. */
  55 #define RELOC_32BIT EXEC_OBJECT_SUPPORTS_48B_ADDRESS
  56 uint64_t brw_batch_reloc(struct intel_batchbuffer *batch,
  57                          uint32_t batch_offset,
  58                          struct brw_bo *target,
  59                          uint32_t target_offset,
  60                          unsigned flags);
  61 uint64_t brw_state_reloc(struct intel_batchbuffer *batch,
  62                          uint32_t batch_offset,
  63                          struct brw_bo *target,
  64                          uint32_t target_offset,
  65                          unsigned flags);
  66
  67 #define USED_BATCH(_batch) \
  68    ((uintptr_t)((_batch).map_next - (_batch).batch.map))
  69
  70 static inline uint32_t float_as_int(float f)
  71 {
  72    union {
  73       float f;
  74       uint32_t d;
  75    } fi;
  76
  77    fi.f = f;
  78    return fi.d;
  79 }
  80
  81 static inline void
  82 intel_batchbuffer_begin(struct brw_context *brw, int n)
  83 {
  84    intel_batchbuffer_require_space(brw, n * 4);
  85
  86 #ifdef DEBUG
  87    brw->batch.emit = USED_BATCH(brw->batch);
  88    brw->batch.total = n;
  89 #endif
  90 }
  91
  92 static inline void
  93 intel_batchbuffer_advance(struct brw_context *brw)
  94 {
  95 #ifdef DEBUG
  96    struct intel_batchbuffer *batch = &brw->batch;
  97    unsigned int _n = USED_BATCH(*batch) - batch->emit;
  98    assert(batch->total != 0);
  99    if (_n != batch->total) {
 100       fprintf(stderr, "ADVANCE_BATCH: %d of %d dwords emitted\n",
 101               _n, batch->total);
 102       abort();
 103    }
 104    batch->total = 0;
 105 #else
 106    (void) brw;
 107 #endif
 108 }
 109
 110 static inline bool
 111 brw_ptr_in_state_buffer(struct intel_batchbuffer *batch, void *p)
 112 {
 113    return (char *) p >= (char *) batch->state.map &&
 114           (char *) p < (char *) batch->state.map + batch->state.bo->size;
 115 }
 116
 117 #define BEGIN_BATCH(n) do {                            \
 118    intel_batchbuffer_begin(brw, (n));                  \
 119    uint32_t *__map = brw->batch.map_next;              \
 120    brw->batch.map_next += (n)
 121
 122 #define BEGIN_BATCH_BLT(n) do {                        \
 123    assert(brw->screen->devinfo.gen < 6);               \
 124    intel_batchbuffer_begin(brw, (n));                  \
 125    uint32_t *__map = brw->batch.map_next;              \
 126    brw->batch.map_next += (n)
 127
 128 #define OUT_BATCH(d) *__map++ = (d)
 129 #define OUT_BATCH_F(f) OUT_BATCH(float_as_int((f)))
 130
 131 #define OUT_RELOC(buf, flags, delta) do {          \
 132    uint32_t __offset = (__map - brw->batch.batch.map) * 4;              \
 133    uint32_t reloc =                                                     \
 134       brw_batch_reloc(&brw->batch, __offset, (buf), (delta), (flags));  \
 135    OUT_BATCH(reloc);                                                    \
 136 } while (0)
 137
 138 /* Handle 48-bit address relocations for Gen8+ */
 139 #define OUT_RELOC64(buf, flags, delta) do {        \
 140    uint32_t __offset = (__map - brw->batch.batch.map) * 4;              \
 141    uint64_t reloc64 =                                                   \
 142       brw_batch_reloc(&brw->batch, __offset, (buf), (delta), (flags));  \
 143    OUT_BATCH(reloc64);                                                  \
 144    OUT_BATCH(reloc64 >> 32);                                            \
 145 } while (0)
 146
 147 #define ADVANCE_BATCH()                  \
 148    assert(__map == brw->batch.map_next); \
 149    intel_batchbuffer_advance(brw);       \
 150 } while (0)
 151
 152 #ifdef __cplusplus
 153 }
 154 #endif
 155
 156 #endif