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/*
* Base class for PCI Express Root Ports
*
* Copyright (C) 2017 Red Hat Inc
*
* Authors:
* Marcel Apfelbaum <marcel@redhat.com>
*
* Most of the code was migrated from hw/pci-bridge/ioh3420.
*
* 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/pcie_port.h"
#include "hw/qdev-properties.h"
static void rp_aer_vector_update(PCIDevice *d)
{
PCIERootPortClass *rpc = PCIE_ROOT_PORT_GET_CLASS(d);
if (rpc->aer_vector) {
pcie_aer_root_set_vector(d, rpc->aer_vector(d));
}
}
static void rp_write_config(PCIDevice *d, uint32_t address,
uint32_t val, int len)
{
uint32_t root_cmd =
pci_get_long(d->config + d->exp.aer_cap + PCI_ERR_ROOT_COMMAND);
uint16_t slt_ctl, slt_sta;
pcie_cap_slot_get(d, &slt_ctl, &slt_sta);
pci_bridge_write_config(d, address, val, len);
rp_aer_vector_update(d);
pcie_cap_slot_write_config(d, slt_ctl, slt_sta, address, val, len);
pcie_aer_write_config(d, address, val, len);
pcie_aer_root_write_config(d, address, val, len, root_cmd);
}
static void rp_reset_hold(Object *obj, ResetType type)
{
PCIDevice *d = PCI_DEVICE(obj);
DeviceState *qdev = DEVICE(obj);
rp_aer_vector_update(d);
pcie_cap_root_reset(d);
pcie_cap_deverr_reset(d);
pcie_cap_slot_reset(d);
pcie_cap_arifwd_reset(d);
pcie_acs_reset(d);
pcie_aer_root_reset(d);
pci_bridge_reset(qdev);
pci_bridge_disable_base_limit(d);
}
static void rp_realize(PCIDevice *d, Error **errp)
{
PCIEPort *p = PCIE_PORT(d);
PCIESlot *s = PCIE_SLOT(d);
PCIDeviceClass *dc = PCI_DEVICE_GET_CLASS(d);
PCIERootPortClass *rpc = PCIE_ROOT_PORT_GET_CLASS(d);
int rc;
pci_config_set_interrupt_pin(d->config, 1);
if (d->cap_present & QEMU_PCIE_CAP_CXL) {
pci_bridge_initfn(d, TYPE_CXL_BUS);
} else {
pci_bridge_initfn(d, TYPE_PCIE_BUS);
}
pcie_port_init_reg(d);
rc = pci_bridge_ssvid_init(d, rpc->ssvid_offset, dc->vendor_id,
rpc->ssid, errp);
if (rc < 0) {
error_append_hint(errp, "Can't init SSV ID, error %d\n", rc);
goto err_bridge;
}
if (rpc->interrupts_init) {
rc = rpc->interrupts_init(d, errp);
if (rc < 0) {
goto err_bridge;
}
}
rc = pcie_cap_init(d, rpc->exp_offset, PCI_EXP_TYPE_ROOT_PORT,
p->port, errp);
if (rc < 0) {
error_append_hint(errp, "Can't add Root Port capability, "
"error %d\n", rc);
goto err_int;
}
pcie_cap_arifwd_init(d);
pcie_cap_deverr_init(d);
pcie_cap_slot_init(d, s);
pcie_cap_root_init(d);
pcie_chassis_create(s->chassis);
rc = pcie_chassis_add_slot(s);
if (rc < 0) {
error_setg(errp, "Can't add chassis slot, error %d", rc);
goto err_pcie_cap;
}
rc = pcie_aer_init(d, PCI_ERR_VER, rpc->aer_offset,
PCI_ERR_SIZEOF, errp);
if (rc < 0) {
goto err;
}
pcie_aer_root_init(d);
rp_aer_vector_update(d);
if (rpc->acs_offset && !s->disable_acs) {
pcie_acs_init(d, rpc->acs_offset);
}
return;
err:
pcie_chassis_del_slot(s);
err_pcie_cap:
pcie_cap_exit(d);
err_int:
if (rpc->interrupts_uninit) {
rpc->interrupts_uninit(d);
}
err_bridge:
pci_bridge_exitfn(d);
}
static void rp_exit(PCIDevice *d)
{
PCIERootPortClass *rpc = PCIE_ROOT_PORT_GET_CLASS(d);
PCIESlot *s = PCIE_SLOT(d);
pcie_aer_exit(d);
pcie_chassis_del_slot(s);
pcie_cap_exit(d);
if (rpc->interrupts_uninit) {
rpc->interrupts_uninit(d);
}
pci_bridge_exitfn(d);
}
static const Property rp_props[] = {
DEFINE_PROP_BIT(COMPAT_PROP_PCP, PCIDevice, cap_present,
QEMU_PCIE_SLTCAP_PCP_BITNR, true),
DEFINE_PROP_BOOL("disable-acs", PCIESlot, disable_acs, false),
};
static void rp_instance_post_init(Object *obj)
{
PCIESlot *s = PCIE_SLOT(obj);
if (!s->speed) {
s->speed = QEMU_PCI_EXP_LNK_2_5GT;
}
if (!s->width) {
s->width = QEMU_PCI_EXP_LNK_X1;
}
}
static void rp_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
ResettableClass *rc = RESETTABLE_CLASS(klass);
k->config_write = rp_write_config;
k->realize = rp_realize;
k->exit = rp_exit;
set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories);
rc->phases.hold = rp_reset_hold;
device_class_set_props(dc, rp_props);
}
static const TypeInfo rp_info = {
.name = TYPE_PCIE_ROOT_PORT,
.parent = TYPE_PCIE_SLOT,
.instance_post_init = rp_instance_post_init,
.class_init = rp_class_init,
.abstract = true,
.class_size = sizeof(PCIERootPortClass),
.interfaces = (InterfaceInfo[]) {
{ INTERFACE_PCIE_DEVICE },
{ }
},
};
static void rp_register_types(void)
{
type_register_static(&rp_info);
}
type_init(rp_register_types)
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