[PULL 20/60] ppc/pnv: set root port chassis and slot using Bus properties

[Daniel Henrique Barboza]

For default root ports we have a way of accessing chassis and slot,
before root_port_realize(), via pnv_phb_attach_root_port(). For the
future user created root ports this won't be the case: we can't use
this helper because we don't have access to the PHB phb-id/chip-id
values.

In earlier patches we've added phb-id and chip-id to pnv-phb-root-bus
objects. We're now able to use the bus to retrieve them. The bus is
reachable for both user created and default devices, so we're changing
all the code paths. This also allow us to validate these changes with
the existing default devices.

Reviewed-by: Cédric Le Goater <c...@kaod.org>
Signed-off-by: Daniel Henrique Barboza <danielhb...@gmail.com>
Reviewed-by: Frederic Barrat <fbar...@linux.ibm.com>
Message-Id: <20220811163950.578927-4-danielhb...@gmail.com>
---
 hw/pci-host/pnv_phb.c | 25 ++++++++++++++++---------
 1 file changed, 16 insertions(+), 9 deletions(-)

diff --git a/hw/pci-host/pnv_phb.c b/hw/pci-host/pnv_phb.c
index c47ed92462..826c0c144e 100644
--- a/hw/pci-host/pnv_phb.c
+++ b/hw/pci-host/pnv_phb.c
@@ -25,21 +25,19 @@
  * QOM id. 'chip_id' is going to be used as PCIE chassis for the
  * root port.
  */
-static void pnv_phb_attach_root_port(PCIHostState *pci, int index, int chip_id)
+static void pnv_phb_attach_root_port(PCIHostState *pci)
 {
     PCIDevice *root = pci_new(PCI_DEVFN(0, 0), TYPE_PNV_PHB_ROOT_PORT);
-    g_autofree char *default_id = g_strdup_printf("%s[%d]",
-                                                  TYPE_PNV_PHB_ROOT_PORT,
-                                                  index);
     const char *dev_id = DEVICE(root)->id;
+    g_autofree char *default_id = NULL;
+    int index;
+
+    index = object_property_get_int(OBJECT(pci->bus), "phb-id", &error_fatal);
+    default_id = g_strdup_printf("%s[%d]", TYPE_PNV_PHB_ROOT_PORT, index);
 
     object_property_add_child(OBJECT(pci->bus), dev_id ? dev_id : default_id,
                               OBJECT(root));
 
-    /* Set unique chassis/slot values for the root port */
-    qdev_prop_set_uint8(DEVICE(root), "chassis", chip_id);
-    qdev_prop_set_uint16(DEVICE(root), "slot", index);
-
     pci_realize_and_unref(root, pci->bus, &error_fatal);
 }
 
@@ -93,7 +91,7 @@ static void pnv_phb_realize(DeviceState *dev, Error **errp)
         pnv_phb4_bus_init(dev, PNV_PHB4(phb->backend));
     }
 
-    pnv_phb_attach_root_port(pci, phb->phb_id, phb->chip_id);
+    pnv_phb_attach_root_port(pci);
 }
 
 static const char *pnv_phb_root_bus_path(PCIHostState *host_bridge,
@@ -162,9 +160,18 @@ static void pnv_phb_root_port_realize(DeviceState *dev, 
Error **errp)
 {
     PCIERootPortClass *rpc = PCIE_ROOT_PORT_GET_CLASS(dev);
     PnvPHBRootPort *phb_rp = PNV_PHB_ROOT_PORT(dev);
+    PCIBus *bus = PCI_BUS(qdev_get_parent_bus(dev));
     PCIDevice *pci = PCI_DEVICE(dev);
     uint16_t device_id = 0;
     Error *local_err = NULL;
+    int chip_id, index;
+
+    chip_id = object_property_get_int(OBJECT(bus), "chip-id", &error_fatal);
+    index = object_property_get_int(OBJECT(bus), "phb-id", &error_fatal);
+
+    /* Set unique chassis/slot values for the root port */
+    qdev_prop_set_uint8(dev, "chassis", chip_id);
+    qdev_prop_set_uint16(dev, "slot", index);
 
     rpc->parent_realize(dev, &local_err);
     if (local_err) {
-- 
2.37.2