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/*
* QEMU sPAPR VIO code
*
* Copyright (c) 2010 David Gibson, IBM Corporation <dwg@au1.ibm.com>
* Based on the s390 virtio bus code:
* Copyright (c) 2009 Alexander Graf <agraf@suse.de>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, see <http://www.gnu.org/licenses/>.
*/
#include "hw.h"
#include "sysemu.h"
#include "boards.h"
#include "monitor.h"
#include "loader.h"
#include "elf.h"
#include "hw/sysbus.h"
#include "kvm.h"
#include "device_tree.h"
#include "hw/spapr.h"
#include "hw/spapr_vio.h"
#ifdef CONFIG_FDT
#include <libfdt.h>
#endif /* CONFIG_FDT */
/* #define DEBUG_SPAPR */
#ifdef DEBUG_SPAPR
#define dprintf(fmt, ...) \
do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0)
#else
#define dprintf(fmt, ...) \
do { } while (0)
#endif
static struct BusInfo spapr_vio_bus_info = {
.name = "spapr-vio",
.size = sizeof(VIOsPAPRBus),
};
VIOsPAPRDevice *spapr_vio_find_by_reg(VIOsPAPRBus *bus, uint32_t reg)
{
DeviceState *qdev;
VIOsPAPRDevice *dev = NULL;
QLIST_FOREACH(qdev, &bus->bus.children, sibling) {
dev = (VIOsPAPRDevice *)qdev;
if (dev->reg == reg) {
break;
}
}
return dev;
}
#ifdef CONFIG_FDT
static int vio_make_devnode(VIOsPAPRDevice *dev,
void *fdt)
{
VIOsPAPRDeviceInfo *info = (VIOsPAPRDeviceInfo *)dev->qdev.info;
int vdevice_off, node_off;
int ret;
vdevice_off = fdt_path_offset(fdt, "/vdevice");
if (vdevice_off < 0) {
return vdevice_off;
}
node_off = fdt_add_subnode(fdt, vdevice_off, dev->qdev.id);
if (node_off < 0) {
return node_off;
}
ret = fdt_setprop_cell(fdt, node_off, "reg", dev->reg);
if (ret < 0) {
return ret;
}
if (info->dt_type) {
ret = fdt_setprop_string(fdt, node_off, "device_type",
info->dt_type);
if (ret < 0) {
return ret;
}
}
if (info->dt_compatible) {
ret = fdt_setprop_string(fdt, node_off, "compatible",
info->dt_compatible);
if (ret < 0) {
return ret;
}
}
if (info->devnode) {
ret = (info->devnode)(dev, fdt, node_off);
if (ret < 0) {
return ret;
}
}
return node_off;
}
#endif /* CONFIG_FDT */
static int spapr_vio_busdev_init(DeviceState *qdev, DeviceInfo *qinfo)
{
VIOsPAPRDeviceInfo *info = (VIOsPAPRDeviceInfo *)qinfo;
VIOsPAPRDevice *dev = (VIOsPAPRDevice *)qdev;
char *id;
if (asprintf(&id, "%s@%x", info->dt_name, dev->reg) < 0) {
return -1;
}
dev->qdev.id = id;
return info->init(dev);
}
void spapr_vio_bus_register_withprop(VIOsPAPRDeviceInfo *info)
{
info->qdev.init = spapr_vio_busdev_init;
info->qdev.bus_info = &spapr_vio_bus_info;
assert(info->qdev.size >= sizeof(VIOsPAPRDevice));
qdev_register(&info->qdev);
}
VIOsPAPRBus *spapr_vio_bus_init(void)
{
VIOsPAPRBus *bus;
BusState *qbus;
DeviceState *dev;
DeviceInfo *qinfo;
/* Create bridge device */
dev = qdev_create(NULL, "spapr-vio-bridge");
qdev_init_nofail(dev);
/* Create bus on bridge device */
qbus = qbus_create(&spapr_vio_bus_info, dev, "spapr-vio");
bus = DO_UPCAST(VIOsPAPRBus, bus, qbus);
for (qinfo = device_info_list; qinfo; qinfo = qinfo->next) {
VIOsPAPRDeviceInfo *info = (VIOsPAPRDeviceInfo *)qinfo;
if (qinfo->bus_info != &spapr_vio_bus_info) {
continue;
}
if (info->hcalls) {
info->hcalls(bus);
}
}
return bus;
}
/* Represents sPAPR hcall VIO devices */
static int spapr_vio_bridge_init(SysBusDevice *dev)
{
/* nothing */
return 0;
}
static SysBusDeviceInfo spapr_vio_bridge_info = {
.init = spapr_vio_bridge_init,
.qdev.name = "spapr-vio-bridge",
.qdev.size = sizeof(SysBusDevice),
.qdev.no_user = 1,
};
static void spapr_vio_register_devices(void)
{
sysbus_register_withprop(&spapr_vio_bridge_info);
}
device_init(spapr_vio_register_devices)
#ifdef CONFIG_FDT
int spapr_populate_vdevice(VIOsPAPRBus *bus, void *fdt)
{
DeviceState *qdev;
int ret = 0;
QLIST_FOREACH(qdev, &bus->bus.children, sibling) {
VIOsPAPRDevice *dev = (VIOsPAPRDevice *)qdev;
ret = vio_make_devnode(dev, fdt);
if (ret < 0) {
return ret;
}
}
return 0;
}
#endif /* CONFIG_FDT */
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