[Mesa-dev] [PATCH v2 01/12] anv/image: Do not override lower bits of dword.

[Rafael Antognolli]

The lower bits seem to have extra fields in every platform but gen8
(even though we don't use them in gen9). So just go ahead and avoid
using them for the address.

Signed-off-by: Rafael Antognolli <rafael.antognolli at intel.com>
---
 src/intel/vulkan/anv_image.c | 30 +++++++++++++++++-------------
 1 file changed, 17 insertions(+), 13 deletions(-)

diff --git a/src/intel/vulkan/anv_image.c b/src/intel/vulkan/anv_image.c
index 72e408764d8..4ccdc16cc23 100644
--- a/src/intel/vulkan/anv_image.c
+++ b/src/intel/vulkan/anv_image.c
@@ -1031,19 +1031,23 @@ anv_image_fill_surface_state(struct anv_device *device,
                           .x_offset_sa = tile_x_sa,
                           .y_offset_sa = tile_y_sa);
       state_inout->address = address + offset_B;
-      if (device->info.gen >= 8) {
-         state_inout->aux_address = aux_address;
-      } else {
-         /* On gen7 and prior, the bottom 12 bits of the MCS base address are
-          * used to store other information.  This should be ok, however,
-          * because surface buffer addresses are always 4K page alinged.
-          */
-         uint32_t *aux_addr_dw = state_inout->state.map +
-                                 device->isl_dev.ss.aux_addr_offset;
-         assert((aux_address & 0xfff) == 0);
-         assert(aux_address == (*aux_addr_dw & 0xfffff000));
-         state_inout->aux_address = *aux_addr_dw;
-      }
+
+      /* On gen7 and prior, the bottom 12 bits of the MCS base address are
+       * used to store other information.  This should be ok, however,
+       * because surface buffer addresses are always 4K page alinged.
+       *
+       * On gen9, the bottom 10 bits can be used, but we don't use them. On
+       * gen10 the bit 10 needs to be used.
+       *
+       * Since the trend seems to be that we might end up using them anyway
+       * (gen8 being the only exception), just always make sure they don't get
+       * overriden by the address.
+       */
+      uint32_t *aux_addr_dw = state_inout->state.map +
+         device->isl_dev.ss.aux_addr_offset;
+      assert((aux_address & 0xfff) == 0);
+      assert(aux_address == (*aux_addr_dw & 0xfffff000));
+      state_inout->aux_address = *aux_addr_dw;
    }
 
    anv_state_flush(device, state_inout->state);
-- 
2.14.3