drm/amdgpu: use a macro to define no xcp partition case

~0 as no xcp partition is used in several places, so improve its
definition by a macro for code consistency.
Suggested-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Guchun Chen <guchun.chen@amd.com>
Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -1709,7 +1709,8 @@ int amdgpu_amdkfd_gpuvm_alloc_memory_of_gpu(
 			alloc_flags |= (flags & KFD_IOC_ALLOC_MEM_FLAGS_PUBLIC) ?
 			AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED : 0;
 		}
-		xcp_id = fpriv->xcp_id == ~0 ? 0 : fpriv->xcp_id;
+		xcp_id = fpriv->xcp_id == AMDGPU_XCP_NO_PARTITION ?
+					0 : fpriv->xcp_id;
 	} else if (flags & KFD_IOC_ALLOC_MEM_FLAGS_GTT) {
 		domain = alloc_domain = AMDGPU_GEM_DOMAIN_GTT;
 		alloc_flags = 0;

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

@@ -363,7 +363,7 @@ int amdgpu_xcp_open_device(struct amdgpu_device *adev,
 	if (!adev->xcp_mgr)
 		return 0;
 
-	fpriv->xcp_id = ~0;
+	fpriv->xcp_id = AMDGPU_XCP_NO_PARTITION;
 	for (i = 0; i < MAX_XCP; ++i) {
 		if (!adev->xcp_mgr->xcp[i].ddev)
 			break;
@@ -381,7 +381,7 @@ int amdgpu_xcp_open_device(struct amdgpu_device *adev,
 		}
 	}
 
-	fpriv->vm.mem_id = fpriv->xcp_id == ~0 ? -1 :
+	fpriv->vm.mem_id = fpriv->xcp_id == AMDGPU_XCP_NO_PARTITION ? -1 :
 				adev->xcp_mgr->xcp[fpriv->xcp_id].mem_id;
 	return 0;
 }

drivers/gpu/drm/amd/amdgpu/amdgpu_xcp.h

@@ -37,6 +37,8 @@
 #define AMDGPU_XCP_FL_NONE 0
 #define AMDGPU_XCP_FL_LOCKED (1 << 0)
 
+#define AMDGPU_XCP_NO_PARTITION (~0)
+
 struct amdgpu_fpriv;
 
 enum AMDGPU_XCP_IP_BLOCK {

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

@@ -68,7 +68,7 @@ static void aqua_vanjaram_set_xcp_id(struct amdgpu_device *adev,
 	enum AMDGPU_XCP_IP_BLOCK ip_blk;
 	uint32_t inst_mask;
 
-	ring->xcp_id = ~0;
+	ring->xcp_id = AMDGPU_XCP_NO_PARTITION;
 	if (adev->xcp_mgr->mode == AMDGPU_XCP_MODE_NONE)
 		return;
 
@@ -177,7 +177,7 @@ static int aqua_vanjaram_select_scheds(
 	u32 sel_xcp_id;
 	int i;
 
-	if (fpriv->xcp_id == ~0) {
+	if (fpriv->xcp_id == AMDGPU_XCP_NO_PARTITION) {
 		u32 least_ref_cnt = ~0;
 
 		fpriv->xcp_id = 0;