ac: compute the size of one DCC slice on GFX8

Addrlib doesn't provide this info. Because DCC is linear, at least
on GFX8, it's easy to compute the size of one slice.

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>

diff --git a/src/amd/common/ac_surface.c b/src/amd/common/ac_surface.c
index f8b9d2b..9e45bd4 100644 (file)
--- a/src/amd/common/ac_surface.c
+++ b/src/amd/common/ac_surface.c
@@ -302,6 +302,12 @@ static int gfx6_compute_level(ADDR_HANDLE addrlib,
                                surf_level->dcc_fast_clear_size = AddrDccOut->dccFastClearSize;
                        else
                                surf_level->dcc_fast_clear_size = 0;
+
+                       /* Compute the DCC slice size because addrlib doesn't
+                        * provide this info. As DCC memory is linear (each
+                        * slice is the same size) it's easy to compute.
+                        */
+                       surf->dcc_slice_size = AddrDccOut->dccRamSize / config->info.array_size;
                }
        }
 

diff --git a/src/amd/common/ac_surface.h b/src/amd/common/ac_surface.h
index 3162363..8143c9f 100644 (file)
--- a/src/amd/common/ac_surface.h
+++ b/src/amd/common/ac_surface.h
@@ -212,6 +212,7 @@ struct radeon_surf {
 
     /* DCC and HTILE are very small. */
     uint32_t                    dcc_size;
+    uint32_t                    dcc_slice_size;
     uint32_t                    dcc_alignment;
 
     uint32_t                    htile_size;