qemu/hw/pci-host/q35.c

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/*
* QEMU MCH/ICH9 PCI Bridge Emulation
*
* Copyright (c) 2006 Fabrice Bellard
* Copyright (c) 2009, 2010, 2011
* Isaku Yamahata <yamahata at valinux co jp>
* VA Linux Systems Japan K.K.
* Copyright (C) 2012 Jason Baron <jbaron@redhat.com>
*
* This is based on piix.c, but heavily modified.
*
* 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.
*/
#include "hw/hw.h"
#include "hw/pci-host/q35.h"
#include "qapi/visitor.h"
/****************************************************************************
* Q35 host
*/
static void q35_host_realize(DeviceState *dev, Error **errp)
{
PCIHostState *pci = PCI_HOST_BRIDGE(dev);
Q35PCIHost *s = Q35_HOST_DEVICE(dev);
SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
sysbus_add_io(sbd, MCH_HOST_BRIDGE_CONFIG_ADDR, &pci->conf_mem);
sysbus_init_ioports(sbd, MCH_HOST_BRIDGE_CONFIG_ADDR, 4);
sysbus_add_io(sbd, MCH_HOST_BRIDGE_CONFIG_DATA, &pci->data_mem);
sysbus_init_ioports(sbd, MCH_HOST_BRIDGE_CONFIG_DATA, 4);
pci->bus = pci_bus_new(DEVICE(s), "pcie.0",
s->mch.pci_address_space, s->mch.address_space_io,
0, TYPE_PCIE_BUS);
qdev_set_parent_bus(DEVICE(&s->mch), BUS(pci->bus));
qdev_init_nofail(DEVICE(&s->mch));
}
pci: Replace pci_find_domain() with more general pci_root_bus_path() pci_find_domain() is used in a number of places where we want an id for a whole PCI domain (i.e. the subtree under a PCI root bus). The trouble is that many platforms may support multiple independent host bridges with no hardware supplied notion of domain number. This patch, therefore, replaces calls to pci_find_domain() with calls to a new pci_root_bus_path() returning a string. The new call is implemented in terms of a new callback in the host bridge class, so it can be defined in some way that's well defined for the platform. When no callback is available we fall back on the qbus name. Most current uses of pci_find_domain() are for error or informational messages, so the change in identifiers should be harmless. The exception is pci_get_dev_path(), whose results form part of migration streams. To maintain compatibility with old migration streams, the PIIX PCI host is altered to always supply "0000" for this path, which matches the old domain number (since the code didn't actually support domains other than 0). For the pseries (spapr) PCI bridge we use a different platform-unique identifier (pseries machines can routinely have dozens of PCI host bridges). Theoretically that breaks migration streams, but given that we don't yet have migration support for pseries, it doesn't matter. Any other machines that have working migration support including PCI devices will need to be updated to maintain migration stream compatibility. Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2013-06-06 12:48:49 +04:00
static const char *q35_host_root_bus_path(PCIHostState *host_bridge,
PCIBus *rootbus)
{
Q35PCIHost *s = Q35_HOST_DEVICE(host_bridge);
/* For backwards compat with old device paths */
if (s->mch.short_root_bus) {
return "0000";
}
return "0000:00";
pci: Replace pci_find_domain() with more general pci_root_bus_path() pci_find_domain() is used in a number of places where we want an id for a whole PCI domain (i.e. the subtree under a PCI root bus). The trouble is that many platforms may support multiple independent host bridges with no hardware supplied notion of domain number. This patch, therefore, replaces calls to pci_find_domain() with calls to a new pci_root_bus_path() returning a string. The new call is implemented in terms of a new callback in the host bridge class, so it can be defined in some way that's well defined for the platform. When no callback is available we fall back on the qbus name. Most current uses of pci_find_domain() are for error or informational messages, so the change in identifiers should be harmless. The exception is pci_get_dev_path(), whose results form part of migration streams. To maintain compatibility with old migration streams, the PIIX PCI host is altered to always supply "0000" for this path, which matches the old domain number (since the code didn't actually support domains other than 0). For the pseries (spapr) PCI bridge we use a different platform-unique identifier (pseries machines can routinely have dozens of PCI host bridges). Theoretically that breaks migration streams, but given that we don't yet have migration support for pseries, it doesn't matter. Any other machines that have working migration support including PCI devices will need to be updated to maintain migration stream compatibility. Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2013-06-06 12:48:49 +04:00
}
static void q35_host_get_pci_hole_start(Object *obj, Visitor *v,
void *opaque, const char *name,
Error **errp)
{
Q35PCIHost *s = Q35_HOST_DEVICE(obj);
uint32_t value = s->mch.pci_info.w32.begin;
visit_type_uint32(v, &value, name, errp);
}
static void q35_host_get_pci_hole_end(Object *obj, Visitor *v,
void *opaque, const char *name,
Error **errp)
{
Q35PCIHost *s = Q35_HOST_DEVICE(obj);
uint32_t value = s->mch.pci_info.w32.end;
visit_type_uint32(v, &value, name, errp);
}
static void q35_host_get_pci_hole64_start(Object *obj, Visitor *v,
void *opaque, const char *name,
Error **errp)
{
PCIHostState *h = PCI_HOST_BRIDGE(obj);
Range w64;
pci_bus_get_w64_range(h->bus, &w64);
visit_type_uint64(v, &w64.begin, name, errp);
}
static void q35_host_get_pci_hole64_end(Object *obj, Visitor *v,
void *opaque, const char *name,
Error **errp)
{
PCIHostState *h = PCI_HOST_BRIDGE(obj);
Range w64;
pci_bus_get_w64_range(h->bus, &w64);
visit_type_uint64(v, &w64.end, name, errp);
}
static void q35_host_get_mmcfg_size(Object *obj, Visitor *v,
void *opaque, const char *name,
Error **errp)
{
PCIExpressHost *e = PCIE_HOST_BRIDGE(obj);
uint32_t value = e->size;
visit_type_uint32(v, &value, name, errp);
}
static Property mch_props[] = {
DEFINE_PROP_UINT64(PCIE_HOST_MCFG_BASE, Q35PCIHost, parent_obj.base_addr,
MCH_HOST_BRIDGE_PCIEXBAR_DEFAULT),
DEFINE_PROP_SIZE(PCI_HOST_PROP_PCI_HOLE64_SIZE, Q35PCIHost,
mch.pci_hole64_size, DEFAULT_PCI_HOLE64_SIZE),
DEFINE_PROP_UINT32("short_root_bus", Q35PCIHost, mch.short_root_bus, 0),
DEFINE_PROP_END_OF_LIST(),
};
static void q35_host_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
pci: Replace pci_find_domain() with more general pci_root_bus_path() pci_find_domain() is used in a number of places where we want an id for a whole PCI domain (i.e. the subtree under a PCI root bus). The trouble is that many platforms may support multiple independent host bridges with no hardware supplied notion of domain number. This patch, therefore, replaces calls to pci_find_domain() with calls to a new pci_root_bus_path() returning a string. The new call is implemented in terms of a new callback in the host bridge class, so it can be defined in some way that's well defined for the platform. When no callback is available we fall back on the qbus name. Most current uses of pci_find_domain() are for error or informational messages, so the change in identifiers should be harmless. The exception is pci_get_dev_path(), whose results form part of migration streams. To maintain compatibility with old migration streams, the PIIX PCI host is altered to always supply "0000" for this path, which matches the old domain number (since the code didn't actually support domains other than 0). For the pseries (spapr) PCI bridge we use a different platform-unique identifier (pseries machines can routinely have dozens of PCI host bridges). Theoretically that breaks migration streams, but given that we don't yet have migration support for pseries, it doesn't matter. Any other machines that have working migration support including PCI devices will need to be updated to maintain migration stream compatibility. Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2013-06-06 12:48:49 +04:00
PCIHostBridgeClass *hc = PCI_HOST_BRIDGE_CLASS(klass);
pci: Replace pci_find_domain() with more general pci_root_bus_path() pci_find_domain() is used in a number of places where we want an id for a whole PCI domain (i.e. the subtree under a PCI root bus). The trouble is that many platforms may support multiple independent host bridges with no hardware supplied notion of domain number. This patch, therefore, replaces calls to pci_find_domain() with calls to a new pci_root_bus_path() returning a string. The new call is implemented in terms of a new callback in the host bridge class, so it can be defined in some way that's well defined for the platform. When no callback is available we fall back on the qbus name. Most current uses of pci_find_domain() are for error or informational messages, so the change in identifiers should be harmless. The exception is pci_get_dev_path(), whose results form part of migration streams. To maintain compatibility with old migration streams, the PIIX PCI host is altered to always supply "0000" for this path, which matches the old domain number (since the code didn't actually support domains other than 0). For the pseries (spapr) PCI bridge we use a different platform-unique identifier (pseries machines can routinely have dozens of PCI host bridges). Theoretically that breaks migration streams, but given that we don't yet have migration support for pseries, it doesn't matter. Any other machines that have working migration support including PCI devices will need to be updated to maintain migration stream compatibility. Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2013-06-06 12:48:49 +04:00
hc->root_bus_path = q35_host_root_bus_path;
dc->realize = q35_host_realize;
dc->props = mch_props;
set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories);
dc->fw_name = "pci";
}
static void q35_host_initfn(Object *obj)
{
Q35PCIHost *s = Q35_HOST_DEVICE(obj);
PCIHostState *phb = PCI_HOST_BRIDGE(obj);
memory_region_init_io(&phb->conf_mem, obj, &pci_host_conf_le_ops, phb,
"pci-conf-idx", 4);
memory_region_init_io(&phb->data_mem, obj, &pci_host_data_le_ops, phb,
"pci-conf-data", 4);
object_initialize(&s->mch, sizeof(s->mch), TYPE_MCH_PCI_DEVICE);
object_property_add_child(OBJECT(s), "mch", OBJECT(&s->mch), NULL);
qdev_prop_set_uint32(DEVICE(&s->mch), "addr", PCI_DEVFN(0, 0));
qdev_prop_set_bit(DEVICE(&s->mch), "multifunction", false);
object_property_add(obj, PCI_HOST_PROP_PCI_HOLE_START, "int",
q35_host_get_pci_hole_start,
NULL, NULL, NULL, NULL);
object_property_add(obj, PCI_HOST_PROP_PCI_HOLE_END, "int",
q35_host_get_pci_hole_end,
NULL, NULL, NULL, NULL);
object_property_add(obj, PCI_HOST_PROP_PCI_HOLE64_START, "int",
q35_host_get_pci_hole64_start,
NULL, NULL, NULL, NULL);
object_property_add(obj, PCI_HOST_PROP_PCI_HOLE64_END, "int",
q35_host_get_pci_hole64_end,
NULL, NULL, NULL, NULL);
object_property_add(obj, PCIE_HOST_MCFG_SIZE, "int",
q35_host_get_mmcfg_size,
NULL, NULL, NULL, NULL);
/* Leave enough space for the biggest MCFG BAR */
/* TODO: this matches current bios behaviour, but
* it's not a power of two, which means an MTRR
* can't cover it exactly.
*/
s->mch.pci_info.w32.begin = MCH_HOST_BRIDGE_PCIEXBAR_DEFAULT +
MCH_HOST_BRIDGE_PCIEXBAR_MAX;
s->mch.pci_info.w32.end = IO_APIC_DEFAULT_ADDRESS;
}
static const TypeInfo q35_host_info = {
.name = TYPE_Q35_HOST_DEVICE,
.parent = TYPE_PCIE_HOST_BRIDGE,
.instance_size = sizeof(Q35PCIHost),
.instance_init = q35_host_initfn,
.class_init = q35_host_class_init,
};
/****************************************************************************
* MCH D0:F0
*/
/* PCIe MMCFG */
static void mch_update_pciexbar(MCHPCIState *mch)
{
PCIDevice *pci_dev = PCI_DEVICE(mch);
BusState *bus = qdev_get_parent_bus(DEVICE(mch));
PCIExpressHost *pehb = PCIE_HOST_BRIDGE(bus->parent);
uint64_t pciexbar;
int enable;
uint64_t addr;
uint64_t addr_mask;
uint32_t length;
pciexbar = pci_get_quad(pci_dev->config + MCH_HOST_BRIDGE_PCIEXBAR);
enable = pciexbar & MCH_HOST_BRIDGE_PCIEXBAREN;
addr_mask = MCH_HOST_BRIDGE_PCIEXBAR_ADMSK;
switch (pciexbar & MCH_HOST_BRIDGE_PCIEXBAR_LENGTH_MASK) {
case MCH_HOST_BRIDGE_PCIEXBAR_LENGTH_256M:
length = 256 * 1024 * 1024;
break;
case MCH_HOST_BRIDGE_PCIEXBAR_LENGTH_128M:
length = 128 * 1024 * 1024;
addr_mask |= MCH_HOST_BRIDGE_PCIEXBAR_128ADMSK |
MCH_HOST_BRIDGE_PCIEXBAR_64ADMSK;
break;
case MCH_HOST_BRIDGE_PCIEXBAR_LENGTH_64M:
length = 64 * 1024 * 1024;
addr_mask |= MCH_HOST_BRIDGE_PCIEXBAR_64ADMSK;
break;
case MCH_HOST_BRIDGE_PCIEXBAR_LENGTH_RVD:
default:
enable = 0;
length = 0;
abort();
break;
}
addr = pciexbar & addr_mask;
pcie_host_mmcfg_update(pehb, enable, addr, length);
/* Leave enough space for the MCFG BAR */
/*
* TODO: this matches current bios behaviour, but it's not a power of two,
* which means an MTRR can't cover it exactly.
*/
if (enable) {
mch->pci_info.w32.begin = addr + length;
} else {
mch->pci_info.w32.begin = MCH_HOST_BRIDGE_PCIEXBAR_DEFAULT;
}
}
/* PAM */
static void mch_update_pam(MCHPCIState *mch)
{
PCIDevice *pd = PCI_DEVICE(mch);
int i;
memory_region_transaction_begin();
for (i = 0; i < 13; i++) {
pam_update(&mch->pam_regions[i], i,
pd->config[MCH_HOST_BRIDGE_PAM0 + ((i + 1) / 2)]);
}
memory_region_transaction_commit();
}
/* SMRAM */
static void mch_update_smram(MCHPCIState *mch)
{
PCIDevice *pd = PCI_DEVICE(mch);
memory_region_transaction_begin();
smram_update(&mch->smram_region, pd->config[MCH_HOST_BRIDGE_SMRAM],
mch->smm_enabled);
memory_region_transaction_commit();
}
static void mch_set_smm(int smm, void *arg)
{
MCHPCIState *mch = arg;
PCIDevice *pd = PCI_DEVICE(mch);
memory_region_transaction_begin();
smram_set_smm(&mch->smm_enabled, smm, pd->config[MCH_HOST_BRIDGE_SMRAM],
&mch->smram_region);
memory_region_transaction_commit();
}
static void mch_write_config(PCIDevice *d,
uint32_t address, uint32_t val, int len)
{
MCHPCIState *mch = MCH_PCI_DEVICE(d);
/* XXX: implement SMRAM.D_LOCK */
pci_default_write_config(d, address, val, len);
if (ranges_overlap(address, len, MCH_HOST_BRIDGE_PAM0,
MCH_HOST_BRIDGE_PAM_SIZE)) {
mch_update_pam(mch);
}
if (ranges_overlap(address, len, MCH_HOST_BRIDGE_PCIEXBAR,
MCH_HOST_BRIDGE_PCIEXBAR_SIZE)) {
mch_update_pciexbar(mch);
}
if (ranges_overlap(address, len, MCH_HOST_BRIDGE_SMRAM,
MCH_HOST_BRIDGE_SMRAM_SIZE)) {
mch_update_smram(mch);
}
}
static void mch_update(MCHPCIState *mch)
{
mch_update_pciexbar(mch);
mch_update_pam(mch);
mch_update_smram(mch);
}
static int mch_post_load(void *opaque, int version_id)
{
MCHPCIState *mch = opaque;
mch_update(mch);
return 0;
}
static const VMStateDescription vmstate_mch = {
.name = "mch",
.version_id = 1,
.minimum_version_id = 1,
.post_load = mch_post_load,
.fields = (VMStateField[]) {
VMSTATE_PCI_DEVICE(parent_obj, MCHPCIState),
VMSTATE_UINT8(smm_enabled, MCHPCIState),
VMSTATE_END_OF_LIST()
}
};
static void mch_reset(DeviceState *qdev)
{
PCIDevice *d = PCI_DEVICE(qdev);
MCHPCIState *mch = MCH_PCI_DEVICE(d);
pci_set_quad(d->config + MCH_HOST_BRIDGE_PCIEXBAR,
MCH_HOST_BRIDGE_PCIEXBAR_DEFAULT);
d->config[MCH_HOST_BRIDGE_SMRAM] = MCH_HOST_BRIDGE_SMRAM_DEFAULT;
mch_update(mch);
}
static AddressSpace *q35_host_dma_iommu(PCIBus *bus, void *opaque, int devfn)
{
IntelIOMMUState *s = opaque;
VTDAddressSpace **pvtd_as;
int bus_num = pci_bus_num(bus);
assert(0 <= bus_num && bus_num <= VTD_PCI_BUS_MAX);
assert(0 <= devfn && devfn <= VTD_PCI_DEVFN_MAX);
pvtd_as = s->address_spaces[bus_num];
if (!pvtd_as) {
/* No corresponding free() */
pvtd_as = g_malloc0(sizeof(VTDAddressSpace *) * VTD_PCI_DEVFN_MAX);
s->address_spaces[bus_num] = pvtd_as;
}
if (!pvtd_as[devfn]) {
pvtd_as[devfn] = g_malloc0(sizeof(VTDAddressSpace));
pvtd_as[devfn]->bus_num = (uint8_t)bus_num;
pvtd_as[devfn]->devfn = (uint8_t)devfn;
pvtd_as[devfn]->iommu_state = s;
pvtd_as[devfn]->context_cache_entry.context_cache_gen = 0;
memory_region_init_iommu(&pvtd_as[devfn]->iommu, OBJECT(s),
&s->iommu_ops, "intel_iommu", UINT64_MAX);
address_space_init(&pvtd_as[devfn]->as,
&pvtd_as[devfn]->iommu, "intel_iommu");
}
return &pvtd_as[devfn]->as;
}
static void mch_init_dmar(MCHPCIState *mch)
{
PCIBus *pci_bus = PCI_BUS(qdev_get_parent_bus(DEVICE(mch)));
mch->iommu = INTEL_IOMMU_DEVICE(qdev_create(NULL, TYPE_INTEL_IOMMU_DEVICE));
object_property_add_child(OBJECT(mch), "intel-iommu",
OBJECT(mch->iommu), NULL);
qdev_init_nofail(DEVICE(mch->iommu));
sysbus_mmio_map(SYS_BUS_DEVICE(mch->iommu), 0, Q35_HOST_BRIDGE_IOMMU_ADDR);
pci_setup_iommu(pci_bus, q35_host_dma_iommu, mch->iommu);
}
static int mch_init(PCIDevice *d)
{
int i;
MCHPCIState *mch = MCH_PCI_DEVICE(d);
/* setup pci memory mapping */
pc_pci_as_mapping_init(OBJECT(mch), mch->system_memory,
mch->pci_address_space);
/* smram */
cpu_smm_register(&mch_set_smm, mch);
memory_region_init_alias(&mch->smram_region, OBJECT(mch), "smram-region",
mch->pci_address_space, 0xa0000, 0x20000);
memory_region_add_subregion_overlap(mch->system_memory, 0xa0000,
&mch->smram_region, 1);
memory_region_set_enabled(&mch->smram_region, false);
init_pam(DEVICE(mch), mch->ram_memory, mch->system_memory,
mch->pci_address_space, &mch->pam_regions[0],
PAM_BIOS_BASE, PAM_BIOS_SIZE);
for (i = 0; i < 12; ++i) {
init_pam(DEVICE(mch), mch->ram_memory, mch->system_memory,
mch->pci_address_space, &mch->pam_regions[i+1],
PAM_EXPAN_BASE + i * PAM_EXPAN_SIZE, PAM_EXPAN_SIZE);
}
/* Intel IOMMU (VT-d) */
if (qemu_opt_get_bool(qemu_get_machine_opts(), "iommu", false)) {
mch_init_dmar(mch);
}
return 0;
}
uint64_t mch_mcfg_base(void)
{
bool ambiguous;
Object *o = object_resolve_path_type("", TYPE_MCH_PCI_DEVICE, &ambiguous);
if (!o) {
return 0;
}
return MCH_HOST_BRIDGE_PCIEXBAR_DEFAULT;
}
static void mch_class_init(ObjectClass *klass, void *data)
{
PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
DeviceClass *dc = DEVICE_CLASS(klass);
k->init = mch_init;
k->config_write = mch_write_config;
dc->reset = mch_reset;
set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories);
dc->desc = "Host bridge";
dc->vmsd = &vmstate_mch;
k->vendor_id = PCI_VENDOR_ID_INTEL;
k->device_id = PCI_DEVICE_ID_INTEL_Q35_MCH;
k->revision = MCH_HOST_BRIDGE_REVISION_DEFAULT;
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->cannot_instantiate_with_device_add_yet = true;
}
static const TypeInfo mch_info = {
.name = TYPE_MCH_PCI_DEVICE,
.parent = TYPE_PCI_DEVICE,
.instance_size = sizeof(MCHPCIState),
.class_init = mch_class_init,
};
static void q35_register(void)
{
type_register_static(&mch_info);
type_register_static(&q35_host_info);
}
type_init(q35_register);