drm/amdgpu: Support new arcturus mtype

Arcturus repurposed mtype WC to RW. Modify gmc functions
to support the new mtype
Signed-off-by: NOak Zeng <Oak.Zeng@amd.com>
Signed-off-by: NFelix Kuehling <Felix.Kuehling@amd.com>
Reviewed-by: NChristian König <christian.koenig@amd.com>
Reviewed-by: NShaoyun Liu <Shaoyun.Liu@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c

@@ -607,6 +607,9 @@ static uint64_t gmc_v9_0_get_vm_pte_flags(struct amdgpu_device *adev,
 	case AMDGPU_VM_MTYPE_WC:
 		pte_flag |= AMDGPU_PTE_MTYPE_VG10(MTYPE_WC);
 		break;
+	case AMDGPU_VM_MTYPE_RW:
+		pte_flag |= AMDGPU_PTE_MTYPE_VG10(MTYPE_RW);
+		break;
 	case AMDGPU_VM_MTYPE_CC:
 		pte_flag |= AMDGPU_PTE_MTYPE_VG10(MTYPE_CC);
 		break;

drivers/gpu/drm/amd/include/vega10_enum.h

@@ -1037,6 +1037,7 @@ TCC_CACHE_POLICY_STREAM                  = 0x00000001,
 typedef enum MTYPE {
 MTYPE_NC                                 = 0x00000000,
 MTYPE_WC                                 = 0x00000001,
+MTYPE_RW                                 = 0x00000001,
 MTYPE_CC                                 = 0x00000002,
 MTYPE_UC                                 = 0x00000003,
 } MTYPE;