From: Christopher James Halse Rogers christopher.halse.rogers@canonical.com
Attempting to migrate the bo will break the sharing of the buffer.
Signed-off-by: Christopher James Halse Rogers christopher.halse.rogers@canonical.com CC: amd-gfx@lists.freedesktop.org --- drivers/gpu/drm/amd/amdgpu/amdgpu_prime.c | 11 +++++++++++ 1 file changed, 11 insertions(+)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_prime.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_prime.c index 3826d5aea0a6..3c84ec5c6ac8 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_prime.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_prime.c @@ -74,6 +74,17 @@ amdgpu_gem_prime_import_sg_table(struct drm_device *dev, if (ret) return ERR_PTR(ret);
+ /* Imported bo must be pinned to GTT, as moving it breaks sharing */ + ret = amdgpu_bo_reserve(bo, false); + if (ret) + return ERR_PTR(ret); + + ret = amdgpu_bo_pin(bo, AMDGPU_GEM_DOMAIN_GTT, NULL); + if (ret) + return ERR_PTR(ret); + + amdgpu_bo_unreserve(bo); + bo->prime_shared_count = 1; return &bo->gem_base; }