drm/amdgpu: Set atomics to true for xgmi

xgmi support atomics between links. Set them to true. This only set for
GFX12 onwards to avoid regression on older generations

v2: Use correct xgmi flag that indicates CPU connection

Signed-off-by: Harish Kasiviswanathan <Harish.Kasiviswanathan@amd.com>
Reviewed-by: Felix Kuehling <felix.kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

Author: hkasivis

drivers/gpu/drm/amd/amdgpu/amdgpu_device.c

@@ -4615,9 +4615,10 @@ int amdgpu_device_init(struct amdgpu_device *adev,
 	/* APUs w/ gfx9 onwards doesn't reply on PCIe atomics, rather it is a
 	 * internal path natively support atomics, set have_atomics_support to true.
 	 */
-	} else if ((adev->flags & AMD_IS_APU) &&
-		   (amdgpu_ip_version(adev, GC_HWIP, 0) >
-		    IP_VERSION(9, 0, 0))) {
+	} else if ((adev->flags & AMD_IS_APU &&
+		   amdgpu_ip_version(adev, GC_HWIP, 0) > IP_VERSION(9, 0, 0)) ||
+		   (adev->gmc.xgmi.connected_to_cpu &&
+		   amdgpu_ip_version(adev, GC_HWIP, 0) >= IP_VERSION(12, 1, 0))) {
 		adev->have_atomics_support = true;
 	} else {
 		adev->have_atomics_support =