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ppc/pnv: add PnvPHB base/proxy device 

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>
Reviewed-by: Frederic Barrat <fbarrat@linux.ibm.com>
Message-Id: <20220624084921.399219-3-danielhb413@gmail.com>
This commit is contained in:
Daniel Henrique Barboza 2022-06-24 05:49:11 -03:00
parent 91bcee7157
commit e4e6db5283
3 changed files with 165 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
hw/pci-host/meson.build
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@ -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',
))

124
hw/pci-host/pnv_phb.c Normal file
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@ -0,0 +1,124 @@
/*
* 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-backend", 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, PNV_PHB3(phb->backend));
}
pnv_phb_attach_root_port(pci, phb_rootport_typename,
phb->phb_id, phb->chip_id);
}
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 = false;
}
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)

39
hw/pci-host/pnv_phb.h Normal file
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@ -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 */