anv/gen12: Implement programming of pixel pipe hashing tables.

See previous commit "iris/gen12: Implement programming of pixel pipe
hashing tables." for the rationale.

Reviewed-by: Jason Ekstrand <jason@jlekstrand.net>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/8749>

diff --git a/src/intel/vulkan/genX_state.c b/src/intel/vulkan/genX_state.c
index f779bf3..b6e984d 100644 (file)
--- a/src/intel/vulkan/genX_state.c
+++ b/src/intel/vulkan/genX_state.c
@@ -106,6 +106,48 @@ genX(emit_slice_hashing_state)(struct anv_device *device,
    anv_batch_emit(batch, GENX(3DSTATE_3D_MODE), mode) {
       mode.SliceHashingTableEnable = true;
    }
+#elif GEN_VERSIONx10 == 120
+   /* For each n calculate ppipes_of[n], equal to the number of pixel pipes
+    * present with n active dual subslices.
+    */
+   unsigned ppipes_of[3] = {};
+
+   for (unsigned n = 0; n < ARRAY_SIZE(ppipes_of); n++) {
+      for (unsigned p = 0; p < ARRAY_SIZE(device->info.ppipe_subslices); p++)
+         ppipes_of[n] += (device->info.ppipe_subslices[p] == n);
+   }
+
+   /* Gen12 has three pixel pipes. */
+   assert(ppipes_of[0] + ppipes_of[1] + ppipes_of[2] == 3);
+
+   if (ppipes_of[2] == 3 || ppipes_of[0] == 2) {
+      /* All three pixel pipes have the maximum number of active dual
+       * subslices, or there is only one active pixel pipe: Nothing to do.
+       */
+      return;
+   }
+
+   anv_batch_emit(batch, GENX(3DSTATE_SUBSLICE_HASH_TABLE), p) {
+      p.SliceHashControl[0] = TABLE_0;
+
+      if (ppipes_of[2] == 2 && ppipes_of[0] == 1)
+         calculate_pixel_hashing_table(8, 16, 2, 2, 0, p.TwoWayTableEntry[0]);
+      else if (ppipes_of[2] == 1 && ppipes_of[1] == 1 && ppipes_of[0] == 1)
+         calculate_pixel_hashing_table(8, 16, 3, 3, 0, p.TwoWayTableEntry[0]);
+
+      if (ppipes_of[2] == 2 && ppipes_of[1] == 1)
+         calculate_pixel_hashing_table(8, 16, 5, 4, 0, p.ThreeWayTableEntry[0]);
+      else if (ppipes_of[2] == 2 && ppipes_of[0] == 1)
+         calculate_pixel_hashing_table(8, 16, 2, 2, 0, p.ThreeWayTableEntry[0]);
+      else if (ppipes_of[2] == 1 && ppipes_of[1] == 1 && ppipes_of[0] == 1)
+         calculate_pixel_hashing_table(8, 16, 3, 3, 0, p.ThreeWayTableEntry[0]);
+      else
+         unreachable("Illegal fusing.");
+   }
+
+   anv_batch_emit(batch, GENX(3DSTATE_3D_MODE), p) {
+      p.SubsliceHashingTableEnable = true;
+   }
 #endif
 }