-
-void
-gen7_upload_constant_state(struct brw_context *brw,
- const struct brw_stage_state *stage_state,
- bool active, unsigned opcode)
-{
- uint32_t mocs = brw->gen < 8 ? GEN7_MOCS_L3 : 0;
-
- /* Disable if the shader stage is inactive or there are no push constants. */
- active = active && stage_state->push_const_size != 0;
-
- int dwords = brw->gen >= 8 ? 11 : 7;
- BEGIN_BATCH(dwords);
- OUT_BATCH(opcode << 16 | (dwords - 2));
-
- /* Workaround for SKL+ (we use option #2 until we have a need for more
- * constant buffers). This comes from the documentation for 3DSTATE_CONSTANT_*
- *
- * The driver must ensure The following case does not occur without a flush
- * to the 3D engine: 3DSTATE_CONSTANT_* with buffer 3 read length equal to
- * zero committed followed by a 3DSTATE_CONSTANT_* with buffer 0 read length
- * not equal to zero committed. Possible ways to avoid this condition
- * include:
- * 1. always force buffer 3 to have a non zero read length
- * 2. always force buffer 0 to a zero read length
- */
- if (brw->gen >= 9 && active) {
- OUT_BATCH(0);
- OUT_BATCH(stage_state->push_const_size);
- } else {
- OUT_BATCH(active ? stage_state->push_const_size : 0);
- OUT_BATCH(0);
- }
-
- /* Pointer to the constant buffer. Covered by the set of state flags
- * from gen6_prepare_wm_contants
- */
- if (brw->gen >= 9 && active) {
- OUT_BATCH(0);
- OUT_BATCH(0);
- OUT_BATCH(0);
- OUT_BATCH(0);
- /* XXX: When using buffers other than 0, you need to specify the
- * graphics virtual address regardless of INSPM/debug bits
- */
- OUT_RELOC64(brw->batch.bo, I915_GEM_DOMAIN_RENDER, 0,
- stage_state->push_const_offset);
- OUT_BATCH(0);
- OUT_BATCH(0);
- } else if (brw->gen>= 8) {
- OUT_BATCH(active ? (stage_state->push_const_offset | mocs) : 0);
- OUT_BATCH(0);
- OUT_BATCH(0);
- OUT_BATCH(0);
- OUT_BATCH(0);
- OUT_BATCH(0);
- OUT_BATCH(0);
- OUT_BATCH(0);
- } else {
- OUT_BATCH(active ? (stage_state->push_const_offset | mocs) : 0);
- OUT_BATCH(0);
- OUT_BATCH(0);
- OUT_BATCH(0);
- }
-
- ADVANCE_BATCH();
-
- /* On SKL+ the new constants don't take effect until the next corresponding
- * 3DSTATE_BINDING_TABLE_POINTER_* command is parsed so we need to ensure
- * that is sent
- */
- if (brw->gen >= 9)
- brw->ctx.NewDriverState |= BRW_NEW_SURFACES;
-}
-