pci_bus_init(), pci_bus_new_inplace(), pci_bus_new() and pci_register_bus() are misleadingly named. They're not used for initializing *any* PCI bus, but only for a root PCI bus. Non-root buses - i.e. ones under a logical PCI to PCI bridge - are instead created with a direct qbus_create_inplace() (see pci_bridge_initfn()). This patch renames the functions to make it clear they're only used for a root bus. Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Reviewed-by: Marcel Apfelbaum <marcel@redhat.com> Reviewed-by: Peter Xu <peterx@redhat.com>
188 lines
5.7 KiB
C
188 lines
5.7 KiB
C
/*
|
|
* QEMU Generic PCI Express Bridge Emulation
|
|
*
|
|
* Copyright (C) 2015 Alexander Graf <agraf@suse.de>
|
|
*
|
|
* Code loosely based on q35.c.
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
* of this software and associated documentation files (the "Software"), to deal
|
|
* in the Software without restriction, including without limitation the rights
|
|
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
* copies of the Software, and to permit persons to whom the Software is
|
|
* furnished to do so, subject to the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be included in
|
|
* all copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
|
|
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
|
|
* THE SOFTWARE.
|
|
*
|
|
* Check out these documents for more information on the device:
|
|
*
|
|
* http://www.kernel.org/doc/Documentation/devicetree/bindings/pci/host-generic-pci.txt
|
|
* http://www.firmware.org/1275/practice/imap/imap0_9d.pdf
|
|
*/
|
|
#include "qemu/osdep.h"
|
|
#include "hw/hw.h"
|
|
#include "hw/pci-host/gpex.h"
|
|
|
|
/****************************************************************************
|
|
* GPEX host
|
|
*/
|
|
|
|
static void gpex_set_irq(void *opaque, int irq_num, int level)
|
|
{
|
|
GPEXHost *s = opaque;
|
|
|
|
qemu_set_irq(s->irq[irq_num], level);
|
|
}
|
|
|
|
int gpex_set_irq_num(GPEXHost *s, int index, int gsi)
|
|
{
|
|
if (index >= GPEX_NUM_IRQS) {
|
|
return -EINVAL;
|
|
}
|
|
|
|
s->irq_num[index] = gsi;
|
|
return 0;
|
|
}
|
|
|
|
static PCIINTxRoute gpex_route_intx_pin_to_irq(void *opaque, int pin)
|
|
{
|
|
PCIINTxRoute route;
|
|
GPEXHost *s = opaque;
|
|
int gsi = s->irq_num[pin];
|
|
|
|
route.irq = gsi;
|
|
if (gsi < 0) {
|
|
route.mode = PCI_INTX_DISABLED;
|
|
} else {
|
|
route.mode = PCI_INTX_ENABLED;
|
|
}
|
|
|
|
return route;
|
|
}
|
|
|
|
static void gpex_host_realize(DeviceState *dev, Error **errp)
|
|
{
|
|
PCIHostState *pci = PCI_HOST_BRIDGE(dev);
|
|
GPEXHost *s = GPEX_HOST(dev);
|
|
SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
|
|
PCIExpressHost *pex = PCIE_HOST_BRIDGE(dev);
|
|
int i;
|
|
|
|
pcie_host_mmcfg_init(pex, PCIE_MMCFG_SIZE_MAX);
|
|
memory_region_init(&s->io_mmio, OBJECT(s), "gpex_mmio", UINT64_MAX);
|
|
memory_region_init(&s->io_ioport, OBJECT(s), "gpex_ioport", 64 * 1024);
|
|
|
|
sysbus_init_mmio(sbd, &pex->mmio);
|
|
sysbus_init_mmio(sbd, &s->io_mmio);
|
|
sysbus_init_mmio(sbd, &s->io_ioport);
|
|
for (i = 0; i < GPEX_NUM_IRQS; i++) {
|
|
sysbus_init_irq(sbd, &s->irq[i]);
|
|
s->irq_num[i] = -1;
|
|
}
|
|
|
|
pci->bus = pci_register_root_bus(dev, "pcie.0", gpex_set_irq,
|
|
pci_swizzle_map_irq_fn, s, &s->io_mmio,
|
|
&s->io_ioport, 0, 4, TYPE_PCIE_BUS);
|
|
|
|
qdev_set_parent_bus(DEVICE(&s->gpex_root), BUS(pci->bus));
|
|
pci_bus_set_route_irq_fn(pci->bus, gpex_route_intx_pin_to_irq);
|
|
qdev_init_nofail(DEVICE(&s->gpex_root));
|
|
}
|
|
|
|
static const char *gpex_host_root_bus_path(PCIHostState *host_bridge,
|
|
PCIBus *rootbus)
|
|
{
|
|
return "0000:00";
|
|
}
|
|
|
|
static void gpex_host_class_init(ObjectClass *klass, void *data)
|
|
{
|
|
DeviceClass *dc = DEVICE_CLASS(klass);
|
|
PCIHostBridgeClass *hc = PCI_HOST_BRIDGE_CLASS(klass);
|
|
|
|
hc->root_bus_path = gpex_host_root_bus_path;
|
|
dc->realize = gpex_host_realize;
|
|
set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories);
|
|
dc->fw_name = "pci";
|
|
}
|
|
|
|
static void gpex_host_initfn(Object *obj)
|
|
{
|
|
GPEXHost *s = GPEX_HOST(obj);
|
|
GPEXRootState *root = &s->gpex_root;
|
|
|
|
object_initialize(root, sizeof(*root), TYPE_GPEX_ROOT_DEVICE);
|
|
object_property_add_child(obj, "gpex_root", OBJECT(root), NULL);
|
|
qdev_prop_set_int32(DEVICE(root), "addr", PCI_DEVFN(0, 0));
|
|
qdev_prop_set_bit(DEVICE(root), "multifunction", false);
|
|
}
|
|
|
|
static const TypeInfo gpex_host_info = {
|
|
.name = TYPE_GPEX_HOST,
|
|
.parent = TYPE_PCIE_HOST_BRIDGE,
|
|
.instance_size = sizeof(GPEXHost),
|
|
.instance_init = gpex_host_initfn,
|
|
.class_init = gpex_host_class_init,
|
|
};
|
|
|
|
/****************************************************************************
|
|
* GPEX Root D0:F0
|
|
*/
|
|
|
|
static const VMStateDescription vmstate_gpex_root = {
|
|
.name = "gpex_root",
|
|
.version_id = 1,
|
|
.minimum_version_id = 1,
|
|
.fields = (VMStateField[]) {
|
|
VMSTATE_PCI_DEVICE(parent_obj, GPEXRootState),
|
|
VMSTATE_END_OF_LIST()
|
|
}
|
|
};
|
|
|
|
static void gpex_root_class_init(ObjectClass *klass, void *data)
|
|
{
|
|
PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
|
|
DeviceClass *dc = DEVICE_CLASS(klass);
|
|
|
|
set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories);
|
|
dc->desc = "QEMU generic PCIe host bridge";
|
|
dc->vmsd = &vmstate_gpex_root;
|
|
k->vendor_id = PCI_VENDOR_ID_REDHAT;
|
|
k->device_id = PCI_DEVICE_ID_REDHAT_PCIE_HOST;
|
|
k->revision = 0;
|
|
k->class_id = PCI_CLASS_BRIDGE_HOST;
|
|
/*
|
|
* PCI-facing part of the host bridge, not usable without the
|
|
* host-facing part, which can't be device_add'ed, yet.
|
|
*/
|
|
dc->user_creatable = false;
|
|
}
|
|
|
|
static const TypeInfo gpex_root_info = {
|
|
.name = TYPE_GPEX_ROOT_DEVICE,
|
|
.parent = TYPE_PCI_DEVICE,
|
|
.instance_size = sizeof(GPEXRootState),
|
|
.class_init = gpex_root_class_init,
|
|
.interfaces = (InterfaceInfo[]) {
|
|
{ INTERFACE_CONVENTIONAL_PCI_DEVICE },
|
|
{ },
|
|
},
|
|
};
|
|
|
|
static void gpex_register(void)
|
|
{
|
|
type_register_static(&gpex_root_info);
|
|
type_register_static(&gpex_host_info);
|
|
}
|
|
|
|
type_init(gpex_register)
|