drm/amdgpu: cleanup amdgpu_ttm_placement_init

Make it more clear what this function does. No intendet functional change.

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
index 9113fff..04c376f 100644 (file)
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
@@ -116,87 +116,95 @@ bool amdgpu_ttm_bo_is_amdgpu_bo(struct ttm_buffer_object *bo)
 
 static void amdgpu_ttm_placement_init(struct amdgpu_device *adev,
                                      struct ttm_placement *placement,
-                                     struct ttm_place *placements,
+                                     struct ttm_place *places,
                                      u32 domain, u64 flags)
 {
        u32 c = 0, i;
 
-       placement->placement = placements;
-       placement->busy_placement = placements;
-
        if (domain & AMDGPU_GEM_DOMAIN_VRAM) {
+               unsigned visible_pfn = adev->mc.visible_vram_size >> PAGE_SHIFT;
+
                if (flags & AMDGPU_GEM_CREATE_NO_CPU_ACCESS &&
-                       adev->mc.visible_vram_size < adev->mc.real_vram_size) {
-                       placements[c].fpfn =
-                               adev->mc.visible_vram_size >> PAGE_SHIFT;
-                       placements[c++].flags = TTM_PL_FLAG_WC |
+                   adev->mc.visible_vram_size < adev->mc.real_vram_size) {
+                       places[c].fpfn = visible_pfn;
+                       if (flags & AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED)
+                               places[c].lpfn = visible_pfn;
+                       else
+                               places[c].lpfn = 0;
+                       places[c].flags = TTM_PL_FLAG_WC |
                                TTM_PL_FLAG_UNCACHED | TTM_PL_FLAG_VRAM |
                                TTM_PL_FLAG_TOPDOWN;
+                       c++;
                }
-               placements[c].fpfn = 0;
-               placements[c++].flags = TTM_PL_FLAG_WC | TTM_PL_FLAG_UNCACHED |
+
+               places[c].fpfn = 0;
+               places[c].lpfn = 0;
+               places[c].flags = TTM_PL_FLAG_WC | TTM_PL_FLAG_UNCACHED |
                        TTM_PL_FLAG_VRAM;
-               if (!(flags & AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED))
-                       placements[c - 1].flags |= TTM_PL_FLAG_TOPDOWN;
+               if (flags & AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED)
+                       places[c].lpfn = visible_pfn;
+               else
+                       places[c].flags |= TTM_PL_FLAG_TOPDOWN;
+               c++;
        }
 
        if (domain & AMDGPU_GEM_DOMAIN_GTT) {
-               if (flags & AMDGPU_GEM_CREATE_CPU_GTT_USWC) {
-                       placements[c].fpfn = 0;
-                       placements[c++].flags = TTM_PL_FLAG_WC |
-                               TTM_PL_FLAG_TT | TTM_PL_FLAG_UNCACHED;
-               } else {
-                       placements[c].fpfn = 0;
-                       placements[c++].flags = TTM_PL_FLAG_CACHED |
-                               TTM_PL_FLAG_TT;
-               }
+               places[c].fpfn = 0;
+               places[c].lpfn = 0;
+               places[c].flags = TTM_PL_FLAG_TT;
+               if (flags & AMDGPU_GEM_CREATE_CPU_GTT_USWC)
+                       places[c].flags |= TTM_PL_FLAG_WC |
+                               TTM_PL_FLAG_UNCACHED;
+               else
+                       places[c].flags |= TTM_PL_FLAG_CACHED;
+               c++;
        }
 
        if (domain & AMDGPU_GEM_DOMAIN_CPU) {
-               if (flags & AMDGPU_GEM_CREATE_CPU_GTT_USWC) {
-                       placements[c].fpfn = 0;
-                       placements[c++].flags = TTM_PL_FLAG_WC |
-                               TTM_PL_FLAG_SYSTEM | TTM_PL_FLAG_UNCACHED;
-               } else {
-                       placements[c].fpfn = 0;
-                       placements[c++].flags = TTM_PL_FLAG_CACHED |
-                               TTM_PL_FLAG_SYSTEM;
-               }
+               places[c].fpfn = 0;
+               places[c].lpfn = 0;
+               places[c].flags = TTM_PL_FLAG_SYSTEM;
+               if (flags & AMDGPU_GEM_CREATE_CPU_GTT_USWC)
+                       places[c].flags |= TTM_PL_FLAG_WC |
+                               TTM_PL_FLAG_UNCACHED;
+               else
+                       places[c].flags |= TTM_PL_FLAG_CACHED;
+               c++;
        }
 
        if (domain & AMDGPU_GEM_DOMAIN_GDS) {
-               placements[c].fpfn = 0;
-               placements[c++].flags = TTM_PL_FLAG_UNCACHED |
-                       AMDGPU_PL_FLAG_GDS;
+               places[c].fpfn = 0;
+               places[c].lpfn = 0;
+               places[c].flags = TTM_PL_FLAG_UNCACHED | AMDGPU_PL_FLAG_GDS;
+               c++;
        }
+
        if (domain & AMDGPU_GEM_DOMAIN_GWS) {
-               placements[c].fpfn = 0;
-               placements[c++].flags = TTM_PL_FLAG_UNCACHED |
-                       AMDGPU_PL_FLAG_GWS;
+               places[c].fpfn = 0;
+               places[c].lpfn = 0;
+               places[c].flags = TTM_PL_FLAG_UNCACHED | AMDGPU_PL_FLAG_GWS;
+               c++;
        }
+
        if (domain & AMDGPU_GEM_DOMAIN_OA) {
-               placements[c].fpfn = 0;
-               placements[c++].flags = TTM_PL_FLAG_UNCACHED |
-                       AMDGPU_PL_FLAG_OA;
+               places[c].fpfn = 0;
+               places[c].lpfn = 0;
+               places[c].flags = TTM_PL_FLAG_UNCACHED | AMDGPU_PL_FLAG_OA;
+               c++;
        }
 
        if (!c) {
-               placements[c].fpfn = 0;
-               placements[c++].flags = TTM_PL_MASK_CACHING |
-                       TTM_PL_FLAG_SYSTEM;
+               places[c].fpfn = 0;
+               places[c].lpfn = 0;
+               places[c].flags = TTM_PL_MASK_CACHING | TTM_PL_FLAG_SYSTEM;
+               c++;
        }
+
        placement->num_placement = c;
-       placement->num_busy_placement = c;
+       placement->placement = places;
 
-       for (i = 0; i < c; i++) {
-               if ((flags & AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED) &&
-                       (placements[i].flags & TTM_PL_FLAG_VRAM) &&
-                       !placements[i].fpfn)
-                       placements[i].lpfn =
-                               adev->mc.visible_vram_size >> PAGE_SHIFT;
-               else
-                       placements[i].lpfn = 0;
-       }
+       placement->num_busy_placement = c;
+       placement->busy_placement = places;
 }
 
 void amdgpu_ttm_placement_from_domain(struct amdgpu_bo *rbo, u32 domain)