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 /**
  14  * Number of bytes to reserve for commands necessary to complete a batch.
  15  *
  16  * This includes:
  17  * - MI_BATCHBUFFER_END (4 bytes)
  18  * - Optional MI_NOOP for ensuring the batch length is qword aligned (4 bytes)
  19  * - Any state emitted by vtbl->finish_batch():
  20  *   - Gen4-5 record ending occlusion query values (4 * 4 = 16 bytes)
  21  *   - Disabling OA counters on Gen6+ (3 DWords = 12 bytes)
  22  *   - Ending MI_REPORT_PERF_COUNT on Gen5+, plus associated PIPE_CONTROLs:
  23  *     - Two sets of PIPE_CONTROLs, which become 4 PIPE_CONTROLs each on SNB,
  24  *       which are 5 DWords each ==> 2 * 4 * 5 * 4 = 160 bytes
  25  *     - 3 DWords for MI_REPORT_PERF_COUNT itself on Gen6+.  ==> 12 bytes.
  26  *       On Ironlake, it's 6 DWords, but we have some slack due to the lack of
  27  *       Sandybridge PIPE_CONTROL madness.
  28  *   - CC_STATE workaround on HSW (17 * 4 = 68 bytes)
  29  *     - 10 dwords for initial mi_flush
  30  *     - 2 dwords for CC state setup
  31  *     - 5 dwords for the required pipe control at the end
  32  *   - Restoring L3 configuration: (24 dwords = 96 bytes)
  33  *     - 2*6 dwords for two PIPE_CONTROL flushes.
  34  *     - 7 dwords for L3 configuration set-up.
  35  *     - 5 dwords for L3 atomic set-up (on HSW).
  36  */
  37 #define BATCH_RESERVED 308
  38
  39 struct intel_batchbuffer;
  40
  41 void intel_batchbuffer_init(struct intel_batchbuffer *batch,
  42                             drm_bacon_bufmgr *bufmgr,
  43                             bool has_llc);
  44 void intel_batchbuffer_free(struct intel_batchbuffer *batch);
  45 void intel_batchbuffer_save_state(struct brw_context *brw);
  46 void intel_batchbuffer_reset_to_saved(struct brw_context *brw);
  47 void intel_batchbuffer_require_space(struct brw_context *brw, GLuint sz,
  48                                      enum brw_gpu_ring ring);
  49 int _intel_batchbuffer_flush_fence(struct brw_context *brw,
  50                                    int in_fence_fd, int *out_fence_fd,
  51                                    const char *file, int line);
  52
  53 #define intel_batchbuffer_flush(brw) \
  54    _intel_batchbuffer_flush_fence((brw), -1, NULL, __FILE__, __LINE__)
  55
  56 #define intel_batchbuffer_flush_fence(brw, in_fence_fd, out_fence_fd) \
  57    _intel_batchbuffer_flush_fence((brw), (in_fence_fd), (out_fence_fd), \
  58                                   __FILE__, __LINE__)
  59
  60 /* Unlike bmBufferData, this currently requires the buffer be mapped.
  61  * Consider it a convenience function wrapping multple
  62  * intel_buffer_dword() calls.
  63  */
  64 void intel_batchbuffer_data(struct brw_context *brw,
  65                             const void *data, GLuint bytes,
  66                             enum brw_gpu_ring ring);
  67
  68 uint64_t intel_batchbuffer_reloc(struct intel_batchbuffer *batch,
  69                                  drm_bacon_bo *buffer,
  70                                  uint32_t offset,
  71                                  uint32_t read_domains,
  72                                  uint32_t write_domain,
  73                                  uint32_t delta);
  74
  75 #define USED_BATCH(batch) ((uintptr_t)((batch).map_next - (batch).map))
  76
  77 static inline uint32_t float_as_int(float f)
  78 {
  79    union {
  80       float f;
  81       uint32_t d;
  82    } fi;
  83
  84    fi.f = f;
  85    return fi.d;
  86 }
  87
  88 /* Inline functions - might actually be better off with these
  89  * non-inlined.  Certainly better off switching all command packets to
  90  * be passed as structs rather than dwords, but that's a little bit of
  91  * work...
  92  */
  93 static inline unsigned
  94 intel_batchbuffer_space(struct intel_batchbuffer *batch)
  95 {
  96    return (batch->state_batch_offset - batch->reserved_space)
  97       - USED_BATCH(*batch) * 4;
  98 }
  99
 100
 101 static inline void
 102 intel_batchbuffer_emit_dword(struct intel_batchbuffer *batch, GLuint dword)
 103 {
 104 #ifdef DEBUG
 105    assert(intel_batchbuffer_space(batch) >= 4);
 106 #endif
 107    *batch->map_next++ = dword;
 108    assert(batch->ring != UNKNOWN_RING);
 109 }
 110
 111 static inline void
 112 intel_batchbuffer_emit_float(struct intel_batchbuffer *batch, float f)
 113 {
 114    intel_batchbuffer_emit_dword(batch, float_as_int(f));
 115 }
 116
 117 static inline void
 118 intel_batchbuffer_begin(struct brw_context *brw, int n, enum brw_gpu_ring ring)
 119 {
 120    intel_batchbuffer_require_space(brw, n * 4, ring);
 121
 122 #ifdef DEBUG
 123    brw->batch.emit = USED_BATCH(brw->batch);
 124    brw->batch.total = n;
 125 #endif
 126 }
 127
 128 static inline void
 129 intel_batchbuffer_advance(struct brw_context *brw)
 130 {
 131 #ifdef DEBUG
 132    struct intel_batchbuffer *batch = &brw->batch;
 133    unsigned int _n = USED_BATCH(*batch) - batch->emit;
 134    assert(batch->total != 0);
 135    if (_n != batch->total) {
 136       fprintf(stderr, "ADVANCE_BATCH: %d of %d dwords emitted\n",
 137               _n, batch->total);
 138       abort();
 139    }
 140    batch->total = 0;
 141 #else
 142    (void) brw;
 143 #endif
 144 }
 145
 146 #define BEGIN_BATCH(n) do {                            \
 147    intel_batchbuffer_begin(brw, (n), RENDER_RING);     \
 148    uint32_t *__map = brw->batch.map_next;              \
 149    brw->batch.map_next += (n)
 150
 151 #define BEGIN_BATCH_BLT(n) do {                        \
 152    intel_batchbuffer_begin(brw, (n), BLT_RING);        \
 153    uint32_t *__map = brw->batch.map_next;              \
 154    brw->batch.map_next += (n)
 155
 156 #define OUT_BATCH(d) *__map++ = (d)
 157 #define OUT_BATCH_F(f) OUT_BATCH(float_as_int((f)))
 158
 159 #define OUT_RELOC(buf, read_domains, write_domain, delta) do {          \
 160    uint32_t __offset = (__map - brw->batch.map) * 4;                    \
 161    uint32_t reloc =                                                     \
 162       intel_batchbuffer_reloc(&brw->batch, (buf), __offset,             \
 163                               (read_domains), (write_domain), (delta)); \
 164    OUT_BATCH(reloc);                                                    \
 165 } while (0)
 166
 167 /* Handle 48-bit address relocations for Gen8+ */
 168 #define OUT_RELOC64(buf, read_domains, write_domain, delta) do {        \
 169    uint32_t __offset = (__map - brw->batch.map) * 4;                    \
 170    uint64_t reloc64 =                                                   \
 171       intel_batchbuffer_reloc(&brw->batch, (buf), __offset,             \
 172                               (read_domains), (write_domain), (delta)); \
 173    OUT_BATCH(reloc64);                                                  \
 174    OUT_BATCH(reloc64 >> 32);                                            \
 175 } while (0)
 176
 177 #define ADVANCE_BATCH()                  \
 178    assert(__map == brw->batch.map_next); \
 179    intel_batchbuffer_advance(brw);       \
 180 } while (0)
 181
 182 #ifdef __cplusplus
 183 }
 184 #endif
 185
 186 #endif