anv: Implement new way for setting streamout buffers.

For gen12 we set the streamout buffers using 4 separate
commands instead of 3DSTATE_SO_BUFFER.

Signed-off-by: Plamena Manolova <plamena.manolova@intel.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>

src/intel/vulkan/anv_private.h

@@ -204,6 +204,15 @@ struct gen_perf_config;
  */
 #define ANV_PREDICATE_RESULT_REG 0x2678 /* MI_ALU_REG15 */
 
+/* For gen12 we set the streamout buffers using 4 separate commands
+ * (3DSTATE_SO_BUFFER_INDEX_*) instead of 3DSTATE_SO_BUFFER. However the layout
+ * of the 3DSTATE_SO_BUFFER_INDEX_* commands is identical to that of
+ * 3DSTATE_SO_BUFFER apart from the SOBufferIndex field, so for now we use the
+ * 3DSTATE_SO_BUFFER command, but change the 3DCommandSubOpcode.
+ * SO_BUFFER_INDEX_0_CMD is actually the 3DCommandSubOpcode for
+ * 3DSTATE_SO_BUFFER_INDEX_0.
+ */
+#define SO_BUFFER_INDEX_0_CMD 0x60
 #define anv_printflike(a, b) __attribute__((__format__(__printf__, a, b)))
 
 static inline uint32_t

src/intel/vulkan/genX_cmd_buffer.c

@@ -2757,7 +2757,12 @@ genX(cmd_buffer_flush_state)(struct anv_cmd_buffer *cmd_buffer)
       for (unsigned idx = 0; idx < MAX_XFB_BUFFERS; idx++) {
          struct anv_xfb_binding *xfb = &cmd_buffer->state.xfb_bindings[idx];
          anv_batch_emit(&cmd_buffer->batch, GENX(3DSTATE_SO_BUFFER), sob) {
+#if GEN_GEN < 12
             sob.SOBufferIndex = idx;
+#else
+            sob._3DCommandOpcode = 0;
+            sob._3DCommandSubOpcode = SO_BUFFER_INDEX_0_CMD + idx;
+#endif
 
             if (cmd_buffer->state.xfb_enabled && xfb->buffer && xfb->size != 0) {
                sob.SOBufferEnable = true;

src/intel/vulkan/genX_gpu_memcpy.c

@@ -149,7 +149,12 @@ genX(cmd_buffer_so_memcpy)(struct anv_cmd_buffer *cmd_buffer,
                         VK_SHADER_STAGE_VERTEX_BIT, entry_size);
 
    anv_batch_emit(&cmd_buffer->batch, GENX(3DSTATE_SO_BUFFER), sob) {
+#if GEN_GEN < 12
       sob.SOBufferIndex = 0;
+#else
+      sob._3DCommandOpcode = 0;
+      sob._3DCommandSubOpcode = SO_BUFFER_INDEX_0_CMD;
+#endif
       sob.MOCS = anv_mocs_for_bo(cmd_buffer->device, dst.bo),
       sob.SurfaceBaseAddress = dst;