drm/amdgpu: use explicit limit for VRAM_CONTIGUOUS

Split VRAM won't have a valid offset, so just set an explicit limit
when the flag is given to trigger reallocation if necessary.

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Edward O'Callaghan <funfunctor@folklore1984.net>
Tested-by: Mike Lothian <mike@fireburn.co.uk>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

1 files changed, 7 insertions, 2 deletions

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
index ba41807eb917..c6754e71e1f5 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_object.c
@@ -121,12 +121,17 @@ static void amdgpu_ttm_placement_init(struct amdgpu_device *adev,
 
         if (domain & AMDGPU_GEM_DOMAIN_VRAM) {
                 unsigned visible_pfn = adev->mc.visible_vram_size >> PAGE_SHIFT;
+                unsigned lpfn = 0;
+
+                /* This forces a reallocation if the flag wasn't set before */
+                if (flags & AMDGPU_GEM_CREATE_VRAM_CONTIGUOUS)
+                        lpfn = adev->mc.real_vram_size >> PAGE_SHIFT;
 
                 if (flags & AMDGPU_GEM_CREATE_NO_CPU_ACCESS &&
                     !(flags & AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED) &&
                     adev->mc.visible_vram_size < adev->mc.real_vram_size) {
                         places[c].fpfn = visible_pfn;
-                        places[c].lpfn = 0;
+                        places[c].lpfn = lpfn;
                         places[c].flags = TTM_PL_FLAG_WC |
                                 TTM_PL_FLAG_UNCACHED | TTM_PL_FLAG_VRAM |
                                 TTM_PL_FLAG_TOPDOWN;
@@ -134,7 +139,7 @@ static void amdgpu_ttm_placement_init(struct amdgpu_device *adev,
                 }
 
                 places[c].fpfn = 0;
-                places[c].lpfn = 0;
+                places[c].lpfn = lpfn;
                 places[c].flags = TTM_PL_FLAG_WC | TTM_PL_FLAG_UNCACHED |
                         TTM_PL_FLAG_VRAM;
                 if (flags & AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED)