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/*
* Generic PCI Express Root Port emulation
*
* Copyright (C) 2017 Red Hat Inc
*
* Authors:
* Marcel Apfelbaum <marcel@redhat.com>
*
* This work is licensed under the terms of the GNU GPL, version 2 or later.
* See the COPYING file in the top-level directory.
*/
#include "qemu/osdep.h"
#include "qapi/error.h"
#include "qemu/module.h"
#include "hw/pci/msix.h"
#include "hw/pci/pcie_port.h"
#include "hw/qdev-properties.h"
#include "hw/qdev-properties-system.h"
#include "migration/vmstate.h"
#include "qom/object.h"
#define TYPE_GEN_PCIE_ROOT_PORT "pcie-root-port"
OBJECT_DECLARE_SIMPLE_TYPE(GenPCIERootPort, GEN_PCIE_ROOT_PORT)
#define GEN_PCIE_ROOT_PORT_AER_OFFSET 0x100
#define GEN_PCIE_ROOT_PORT_ACS_OFFSET \
(GEN_PCIE_ROOT_PORT_AER_OFFSET + PCI_ERR_SIZEOF)
#define GEN_PCIE_ROOT_PORT_MSIX_NR_VECTOR 1
#define GEN_PCIE_ROOT_DEFAULT_IO_RANGE 4096
struct GenPCIERootPort {
/*< private >*/
PCIESlot parent_obj;
/*< public >*/
bool migrate_msix;
/* additional resources to reserve */
PCIResReserve res_reserve;
};
static uint8_t gen_rp_aer_vector(const PCIDevice *d)
{
return 0;
}
static int gen_rp_interrupts_init(PCIDevice *d, Error **errp)
{
int rc;
rc = msix_init_exclusive_bar(d, GEN_PCIE_ROOT_PORT_MSIX_NR_VECTOR, 0, errp);
if (rc < 0) {
assert(rc == -ENOTSUP);
} else {
msix_vector_use(d, 0);
}
return rc;
}
static void gen_rp_interrupts_uninit(PCIDevice *d)
{
msix_uninit_exclusive_bar(d);
}
static bool gen_rp_test_migrate_msix(void *opaque, int version_id)
{
GenPCIERootPort *rp = opaque;
return rp->migrate_msix;
}
static void gen_rp_realize(DeviceState *dev, Error **errp)
{
PCIDevice *d = PCI_DEVICE(dev);
PCIESlot *s = PCIE_SLOT(d);
GenPCIERootPort *grp = GEN_PCIE_ROOT_PORT(d);
PCIERootPortClass *rpc = PCIE_ROOT_PORT_GET_CLASS(d);
Error *local_err = NULL;
rpc->parent_realize(dev, &local_err);
if (local_err) {
error_propagate(errp, local_err);
return;
}
/*
* reserving IO space led to worse issues in 6.1, when this hunk was
* introduced. (see commit: 211afe5c69b59). Keep this broken for 6.1
* machine type ABI compatibility only
*/
if (s->hide_native_hotplug_cap && grp->res_reserve.io == -1 && s->hotplug) {
grp->res_reserve.io = GEN_PCIE_ROOT_DEFAULT_IO_RANGE;
}
int rc = pci_bridge_qemu_reserve_cap_init(d, 0,
grp->res_reserve, errp);
if (rc < 0) {
rpc->parent_class.exit(d);
return;
}
if (!grp->res_reserve.io) {
pci_word_test_and_clear_mask(d->wmask + PCI_COMMAND,
PCI_COMMAND_IO);
d->wmask[PCI_IO_BASE] = 0;
d->wmask[PCI_IO_LIMIT] = 0;
}
}
static const VMStateDescription vmstate_rp_dev = {
.name = "pcie-root-port",
.priority = MIG_PRI_PCI_BUS,
.version_id = 1,
.minimum_version_id = 1,
.post_load = pcie_cap_slot_post_load,
.fields = (VMStateField[]) {
VMSTATE_PCI_DEVICE(parent_obj.parent_obj.parent_obj, PCIESlot),
VMSTATE_STRUCT(parent_obj.parent_obj.parent_obj.exp.aer_log,
PCIESlot, 0, vmstate_pcie_aer_log, PCIEAERLog),
VMSTATE_MSIX_TEST(parent_obj.parent_obj.parent_obj.parent_obj,
GenPCIERootPort,
gen_rp_test_migrate_msix),
VMSTATE_END_OF_LIST()
}
};
static Property gen_rp_props[] = {
DEFINE_PROP_BOOL("x-migrate-msix", GenPCIERootPort,
migrate_msix, true),
DEFINE_PROP_UINT32("bus-reserve", GenPCIERootPort,
res_reserve.bus, -1),
DEFINE_PROP_SIZE("io-reserve", GenPCIERootPort,
res_reserve.io, -1),
DEFINE_PROP_SIZE("mem-reserve", GenPCIERootPort,
res_reserve.mem_non_pref, -1),
DEFINE_PROP_SIZE("pref32-reserve", GenPCIERootPort,
res_reserve.mem_pref_32, -1),
DEFINE_PROP_SIZE("pref64-reserve", GenPCIERootPort,
res_reserve.mem_pref_64, -1),
DEFINE_PROP_PCIE_LINK_SPEED("x-speed", PCIESlot,
speed, PCIE_LINK_SPEED_16),
DEFINE_PROP_PCIE_LINK_WIDTH("x-width", PCIESlot,
width, PCIE_LINK_WIDTH_32),
DEFINE_PROP_END_OF_LIST()
};
static void gen_rp_dev_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
PCIERootPortClass *rpc = PCIE_ROOT_PORT_CLASS(klass);
k->vendor_id = PCI_VENDOR_ID_REDHAT;
k->device_id = PCI_DEVICE_ID_REDHAT_PCIE_RP;
dc->desc = "PCI Express Root Port";
dc->vmsd = &vmstate_rp_dev;
device_class_set_props(dc, gen_rp_props);
device_class_set_parent_realize(dc, gen_rp_realize, &rpc->parent_realize);
rpc->aer_vector = gen_rp_aer_vector;
rpc->interrupts_init = gen_rp_interrupts_init;
rpc->interrupts_uninit = gen_rp_interrupts_uninit;
rpc->aer_offset = GEN_PCIE_ROOT_PORT_AER_OFFSET;
rpc->acs_offset = GEN_PCIE_ROOT_PORT_ACS_OFFSET;
}
static const TypeInfo gen_rp_dev_info = {
.name = TYPE_GEN_PCIE_ROOT_PORT,
.parent = TYPE_PCIE_ROOT_PORT,
.instance_size = sizeof(GenPCIERootPort),
.class_init = gen_rp_dev_class_init,
};
static void gen_rp_register_types(void)
{
type_register_static(&gen_rp_dev_info);
}
type_init(gen_rp_register_types)
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