pci: Convert child classes of TYPE_PCIE_ROOT_PORT to 3-phase reset

Convert the TYPE_CXL_ROOT_PORT and TYPE_PNV_PHB_ROOT_PORT classes to
3-phase reset, so they don't need to use the deprecated
device_class_set_parent_reset() function any more.

We have to do both in the same commit, because they keep the
parent_reset field in their common parent class's class struct.

Note that pnv_phb_root_port_class_init() was pointlessly setting
dc->reset twice, once by calling device_class_set_parent_reset()
and once directly.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Tested-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Message-id: 20221125115240.3005559-5-peter.maydell@linaro.org

hw/pci-bridge/cxl_root_port.c

@@ -138,12 +138,14 @@ static void cxl_rp_realize(DeviceState *dev, Error **errp)
                      component_bar);
 }
 
-static void cxl_rp_reset(DeviceState *dev)
+static void cxl_rp_reset_hold(Object *obj)
 {
-    PCIERootPortClass *rpc = PCIE_ROOT_PORT_GET_CLASS(dev);
-    CXLRootPort *crp = CXL_ROOT_PORT(dev);
+    PCIERootPortClass *rpc = PCIE_ROOT_PORT_GET_CLASS(obj);
+    CXLRootPort *crp = CXL_ROOT_PORT(obj);
 
-    rpc->parent_reset(dev);
+    if (rpc->parent_phases.hold) {
+        rpc->parent_phases.hold(obj);
+    }
 
     latch_registers(crp);
 }
@@ -199,6 +201,7 @@ static void cxl_root_port_class_init(ObjectClass *oc, void *data)
 {
     DeviceClass *dc        = DEVICE_CLASS(oc);
     PCIDeviceClass *k      = PCI_DEVICE_CLASS(oc);
+    ResettableClass *rc    = RESETTABLE_CLASS(oc);
     PCIERootPortClass *rpc = PCIE_ROOT_PORT_CLASS(oc);
 
     k->vendor_id = PCI_VENDOR_ID_INTEL;
@@ -209,7 +212,8 @@ static void cxl_root_port_class_init(ObjectClass *oc, void *data)
     k->config_write = cxl_rp_write_config;
 
     device_class_set_parent_realize(dc, cxl_rp_realize, &rpc->parent_realize);
-    device_class_set_parent_reset(dc, cxl_rp_reset, &rpc->parent_reset);
+    resettable_class_set_parent_phases(rc, NULL, cxl_rp_reset_hold, NULL,
+                                       &rpc->parent_phases);
 
     rpc->aer_offset = GEN_PCIE_ROOT_PORT_AER_OFFSET;
     rpc->acs_offset = GEN_PCIE_ROOT_PORT_ACS_OFFSET;

hw/pci-host/pnv_phb.c

@@ -199,14 +199,16 @@ static void pnv_phb_class_init(ObjectClass *klass, void *data)
     dc->user_creatable = true;
 }
 
-static void pnv_phb_root_port_reset(DeviceState *dev)
+static void pnv_phb_root_port_reset_hold(Object *obj)
 {
-    PCIERootPortClass *rpc = PCIE_ROOT_PORT_GET_CLASS(dev);
-    PnvPHBRootPort *phb_rp = PNV_PHB_ROOT_PORT(dev);
-    PCIDevice *d = PCI_DEVICE(dev);
+    PCIERootPortClass *rpc = PCIE_ROOT_PORT_GET_CLASS(obj);
+    PnvPHBRootPort *phb_rp = PNV_PHB_ROOT_PORT(obj);
+    PCIDevice *d = PCI_DEVICE(obj);
     uint8_t *conf = d->config;
 
-    rpc->parent_reset(dev);
+    if (rpc->parent_phases.hold) {
+        rpc->parent_phases.hold(obj);
+    }
 
     if (phb_rp->version == 3) {
         return;
@@ -300,6 +302,7 @@ static Property pnv_phb_root_port_properties[] = {
 static void pnv_phb_root_port_class_init(ObjectClass *klass, void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
+    ResettableClass *rc = RESETTABLE_CLASS(klass);
     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
     PCIERootPortClass *rpc = PCIE_ROOT_PORT_CLASS(klass);
 
@@ -308,9 +311,8 @@ static void pnv_phb_root_port_class_init(ObjectClass *klass, void *data)
     device_class_set_props(dc, pnv_phb_root_port_properties);
     device_class_set_parent_realize(dc, pnv_phb_root_port_realize,
                                     &rpc->parent_realize);
-    device_class_set_parent_reset(dc, pnv_phb_root_port_reset,
-                                  &rpc->parent_reset);
-    dc->reset = &pnv_phb_root_port_reset;
+    resettable_class_set_parent_phases(rc, NULL, pnv_phb_root_port_reset_hold,
+                                       NULL, &rpc->parent_phases);
     dc->user_creatable = true;
 
     k->vendor_id = PCI_VENDOR_ID_IBM;

include/hw/pci/pcie_port.h

@@ -80,7 +80,7 @@ DECLARE_CLASS_CHECKERS(PCIERootPortClass, PCIE_ROOT_PORT,
 struct PCIERootPortClass {
     PCIDeviceClass parent_class;
     DeviceRealize parent_realize;
-    DeviceReset parent_reset;
+    ResettablePhases parent_phases;
 
     uint8_t (*aer_vector)(const PCIDevice *dev);
     int (*interrupts_init)(PCIDevice *dev, Error **errp);