The PnvPHB device is going to be the base device for all other powernv
PHBs. It consists of a device that has the same user API as the other
PHB, namely being a PCIHostBridge and having chip-id and index
properties. It also has a 'backend' pointer that will be initialized
with the PHB implementation that the device is going to use.
The initialization of the PHB backend is done by checking the PHB
version via a 'version' attribute that can be set via a global machine
property. The 'version' field will be used to make adjustments based on
the running version, e.g. PHB3 uses a 'chip' reference while PHB4 uses
'pec'. To init the PnvPHB bus we'll rely on helpers for each version.
The version 3 helper is already added (pnv_phb3_bus_init), the PHB4
helper will be added later on.
For now let's add the basic logic of the PnvPHB object, which consists
mostly of pnv_phb_realize() doing all the work of checking the
phb->version set, initializing the proper backend, passing through its
attributes to the chosen backend, finalizing the backend realize and
adding a root port in the end.
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
---
hw/pci-host/meson.build | 3 +-
hw/pci-host/pnv_phb.c | 123 ++++++++++++++++++++++++++++++++++++++++
hw/pci-host/pnv_phb.h | 39 +++++++++++++
3 files changed, 164 insertions(+), 1 deletion(-)
create mode 100644 hw/pci-host/pnv_phb.c
create mode 100644 hw/pci-host/pnv_phb.h
diff --git a/hw/pci-host/meson.build b/hw/pci-host/meson.build
index c07596d0d1..e832babc9d 100644
--- a/hw/pci-host/meson.build
+++ b/hw/pci-host/meson.build
@@ -35,5 +35,6 @@ specific_ss.add(when: 'CONFIG_PCI_POWERNV', if_true: files(
'pnv_phb3_msi.c',
'pnv_phb3_pbcq.c',
'pnv_phb4.c',
- 'pnv_phb4_pec.c'
+ 'pnv_phb4_pec.c',
+ 'pnv_phb.c',
))
diff --git a/hw/pci-host/pnv_phb.c b/hw/pci-host/pnv_phb.c
new file mode 100644
index 0000000000..fa8472622f
--- /dev/null
+++ b/hw/pci-host/pnv_phb.c
@@ -0,0 +1,123 @@
+/*
+ * QEMU PowerPC PowerNV Proxy PHB model
+ *
+ * Copyright (c) 2022, IBM Corporation.
+ *
+ * This code is licensed under the GPL version 2 or later. See the
+ * COPYING file in the top-level directory.
+ */
+
+#include "qemu/osdep.h"
+#include "qemu/log.h"
+#include "qapi/visitor.h"
+#include "qapi/error.h"
+#include "hw/pci-host/pnv_phb.h"
+#include "hw/pci-host/pnv_phb3.h"
+#include "hw/pci-host/pnv_phb4.h"
+#include "hw/ppc/pnv.h"
+#include "hw/qdev-properties.h"
+#include "qom/object.h"
+
+
+static void pnv_phb_realize(DeviceState *dev, Error **errp)
+{
+ PnvPHB *phb = PNV_PHB(dev);
+ PCIHostState *pci = PCI_HOST_BRIDGE(dev);
+ g_autofree char *phb_typename = NULL;
+ g_autofree char *phb_rootport_typename = NULL;
+
+ if (!phb->version) {
+ error_setg(errp, "version not specified");
+ return;
+ }
+
+ switch (phb->version) {
+ case 3:
+ phb_typename = g_strdup(TYPE_PNV_PHB3);
+ phb_rootport_typename = g_strdup(TYPE_PNV_PHB3_ROOT_PORT);
+ break;
+ case 4:
+ phb_typename = g_strdup(TYPE_PNV_PHB4);
+ phb_rootport_typename = g_strdup(TYPE_PNV_PHB4_ROOT_PORT);
+ break;
+ case 5:
+ phb_typename = g_strdup(TYPE_PNV_PHB5);
+ phb_rootport_typename = g_strdup(TYPE_PNV_PHB5_ROOT_PORT);
+ break;
+ default:
+ g_assert_not_reached();
+ }
+
+ phb->backend = object_new(phb_typename);
+ object_property_add_child(OBJECT(dev), "phb-device", phb->backend);
+
+ /* Passthrough child device properties to the proxy device */
+ object_property_set_uint(phb->backend, "index", phb->phb_id, errp);
+ object_property_set_uint(phb->backend, "chip-id", phb->chip_id, errp);
+ object_property_set_link(phb->backend, "phb-base", OBJECT(phb), errp);
+
+ if (phb->version == 3) {
+ object_property_set_link(phb->backend, "chip",
+ OBJECT(phb->chip), errp);
+ } else {
+ object_property_set_link(phb->backend, "pec", OBJECT(phb->pec), errp);
+ }
+
+ if (!qdev_realize(DEVICE(phb->backend), NULL, errp)) {
+ return;
+ }
+
+ if (phb->version == 3) {
+ pnv_phb3_bus_init(dev, (PnvPHB3 *)phb->backend);
+ }
+
+ pnv_phb_attach_root_port(pci, phb_rootport_typename);
+}
+
+static const char *pnv_phb_root_bus_path(PCIHostState *host_bridge,
+ PCIBus *rootbus)
+{
+ PnvPHB *phb = PNV_PHB(host_bridge);
+
+ snprintf(phb->bus_path, sizeof(phb->bus_path), "00%02x:%02x",
+ phb->chip_id, phb->phb_id);
+ return phb->bus_path;
+}
+
+static Property pnv_phb_properties[] = {
+ DEFINE_PROP_UINT32("index", PnvPHB, phb_id, 0),
+ DEFINE_PROP_UINT32("chip-id", PnvPHB, chip_id, 0),
+ DEFINE_PROP_UINT32("version", PnvPHB, version, 0),
+
+ DEFINE_PROP_LINK("chip", PnvPHB, chip, TYPE_PNV_CHIP, PnvChip *),
+
+ DEFINE_PROP_LINK("pec", PnvPHB, pec, TYPE_PNV_PHB4_PEC,
+ PnvPhb4PecState *),
+
+ DEFINE_PROP_END_OF_LIST(),
+};
+
+static void pnv_phb_class_init(ObjectClass *klass, void *data)
+{
+ PCIHostBridgeClass *hc = PCI_HOST_BRIDGE_CLASS(klass);
+ DeviceClass *dc = DEVICE_CLASS(klass);
+
+ hc->root_bus_path = pnv_phb_root_bus_path;
+ dc->realize = pnv_phb_realize;
+ device_class_set_props(dc, pnv_phb_properties);
+ set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories);
+ dc->user_creatable = true;
+}
+
+static void pnv_phb_register_type(void)
+{
+ static const TypeInfo pnv_phb_type_info = {
+ .name = TYPE_PNV_PHB,
+ .parent = TYPE_PCIE_HOST_BRIDGE,
+ .instance_size = sizeof(PnvPHB),
+ .class_init = pnv_phb_class_init,
+ };
+
+ type_register_static(&pnv_phb_type_info);
+}
+type_init(pnv_phb_register_type)
diff --git a/hw/pci-host/pnv_phb.h b/hw/pci-host/pnv_phb.h
new file mode 100644
index 0000000000..a7cc8610e2
--- /dev/null
+++ b/hw/pci-host/pnv_phb.h
@@ -0,0 +1,39 @@
+/*
+ * QEMU PowerPC PowerNV Proxy PHB model
+ *
+ * Copyright (c) 2022, IBM Corporation.
+ *
+ * This code is licensed under the GPL version 2 or later. See the
+ * COPYING file in the top-level directory.
+ */
+
+#ifndef PCI_HOST_PNV_PHB_H
+#define PCI_HOST_PNV_PHB_H
+
+#include "hw/pci/pcie_host.h"
+#include "hw/pci/pcie_port.h"
+#include "qom/object.h"
+
+typedef struct PnvChip PnvChip;
+typedef struct PnvPhb4PecState PnvPhb4PecState;
+
+struct PnvPHB {
+ PCIExpressHost parent_obj;
+
+ uint32_t chip_id;
+ uint32_t phb_id;
+ uint32_t version;
+ char bus_path[8];
+
+ PnvChip *chip;
+
+ PnvPhb4PecState *pec;
+
+ /* The PHB backend (PnvPHB3, PnvPHB4 ...) being used */
+ Object *backend;
+};
+
+#define TYPE_PNV_PHB "pnv-phb"
+OBJECT_DECLARE_SIMPLE_TYPE(PnvPHB, PNV_PHB)
+
+#endif /* PCI_HOST_PNV_PHB_H */