Also, add the "Vendor-Specific"
capability to the bridge to contain the "Group Identifier" that will be
used to pair a virtio device with the passthrough device attached to
that bridge.
This capability is added to the bridge iff the "failover-group-id"
option is specified for the bridge.
Signed-off-by: Venu Busireddy <address@hidden>
---
default-configs/arm-softmmu.mak | 1 +
default-configs/i386-softmmu.mak | 1 +
default-configs/x86_64-softmmu.mak | 1 +
hw/pci-bridge/Makefile.objs | 1 +
hw/pci-bridge/pcie_downstream.c | 220 +++++++++++++++++++++++++++++
hw/pci-bridge/pcie_downstream.h | 10 ++
include/hw/pci/pci.h | 1 +
7 files changed, 235 insertions(+)
create mode 100644 hw/pci-bridge/pcie_downstream.c
create mode 100644 hw/pci-bridge/pcie_downstream.h
diff --git a/default-configs/arm-softmmu.mak b/default-configs/arm-softmmu.mak
index 834d45cfaf..b86c6fb122 100644
--- a/default-configs/arm-softmmu.mak
+++ b/default-configs/arm-softmmu.mak
@@ -139,6 +139,7 @@ CONFIG_IMX_I2C=y
CONFIG_PCIE_PORT=y
CONFIG_XIO3130=y
CONFIG_IOH3420=y
+CONFIG_PCIE_DOWNSTREAM=y
CONFIG_I82801B11=y
CONFIG_ACPI=y
CONFIG_SMBIOS=y
diff --git a/default-configs/i386-softmmu.mak b/default-configs/i386-softmmu.mak
index 8c7d4a0fa0..a900c8f052 100644
--- a/default-configs/i386-softmmu.mak
+++ b/default-configs/i386-softmmu.mak
@@ -56,6 +56,7 @@ CONFIG_ACPI_NVDIMM=y
CONFIG_PCIE_PORT=y
CONFIG_XIO3130=y
CONFIG_IOH3420=y
+CONFIG_PCIE_DOWNSTREAM=y
CONFIG_I82801B11=y
CONFIG_SMBIOS=y
CONFIG_HYPERV_TESTDEV=$(CONFIG_KVM)
diff --git a/default-configs/x86_64-softmmu.mak
b/default-configs/x86_64-softmmu.mak
index 0390b4303c..481e4764be 100644
--- a/default-configs/x86_64-softmmu.mak
+++ b/default-configs/x86_64-softmmu.mak
@@ -56,6 +56,7 @@ CONFIG_ACPI_NVDIMM=y
CONFIG_PCIE_PORT=y
CONFIG_XIO3130=y
CONFIG_IOH3420=y
+CONFIG_PCIE_DOWNSTREAM=y
CONFIG_I82801B11=y
CONFIG_SMBIOS=y
CONFIG_HYPERV_TESTDEV=$(CONFIG_KVM)
diff --git a/hw/pci-bridge/Makefile.objs b/hw/pci-bridge/Makefile.objs
index 47065f87d9..5b42212edc 100644
--- a/hw/pci-bridge/Makefile.objs
+++ b/hw/pci-bridge/Makefile.objs
@@ -3,6 +3,7 @@ common-obj-$(CONFIG_PCIE_PORT) += pcie_root_port.o
gen_pcie_root_port.o pcie_pci
common-obj-$(CONFIG_PXB) += pci_expander_bridge.o
common-obj-$(CONFIG_XIO3130) += xio3130_upstream.o xio3130_downstream.o
common-obj-$(CONFIG_IOH3420) += ioh3420.o
+common-obj-$(CONFIG_PCIE_DOWNSTREAM) += pcie_downstream.o
common-obj-$(CONFIG_I82801B11) += i82801b11.o
# NewWorld PowerMac
common-obj-$(CONFIG_DEC_PCI) += dec.o
diff --git a/hw/pci-bridge/pcie_downstream.c b/hw/pci-bridge/pcie_downstream.c
new file mode 100644
index 0000000000..49b0d1e933
--- /dev/null
+++ b/hw/pci-bridge/pcie_downstream.c
@@ -0,0 +1,220 @@
+/*
+ * Red Hat PCI Express downstream port.
+ *
+ * pcie_downstream.c
+ * Most of this code is copied from xio3130_downstream.c
+ *
+ * Copyright (c) 2018 Oracle and/or its affiliates.
+ * Author: Venu Busireddy <address@hidden>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "qemu/osdep.h"
+#include "hw/pci/pci_ids.h"
+#include "hw/pci/msi.h"
+#include "hw/pci/pcie.h"
+#include "pcie_downstream.h"
+#include "qapi/error.h"
+
+#define REDHAT_PCIE_DOWNSTREAM_REVISION 0x1
+#define REDHAT_PCIE_DOWNSTREAM_MSI_OFFSET 0x70
+#define REDHAT_PCIE_DOWNSTREAM_MSI_SUPPORTED_FLAGS PCI_MSI_FLAGS_64BIT
+#define REDHAT_PCIE_DOWNSTREAM_MSI_NR_VECTOR 1
+#define REDHAT_PCIE_DOWNSTREAM_SSVID_OFFSET 0x80
+#define REDHAT_PCIE_DOWNSTREAM_SSVID_SVID 0
+#define REDHAT_PCIE_DOWNSTREAM_SSVID_SSID 0
+#define REDHAT_PCIE_DOWNSTREAM_EXP_OFFSET 0x90
+#define REDHAT_PCIE_DOWNSTREAM_VENDOR_OFFSET 0xCC
+#define REDHAT_PCIE_DOWNSTREAM_AER_OFFSET 0x100
+
+static void pcie_downstream_write_config(PCIDevice *d, uint32_t address,
+ uint32_t val, int len)
+{
+ pci_bridge_write_config(d, address, val, len);
+ pcie_cap_flr_write_config(d, address, val, len);
+ pcie_cap_slot_write_config(d, address, val, len);
+ pcie_aer_write_config(d, address, val, len);
+}
+
+static void pcie_downstream_reset(DeviceState *qdev)
+{
+ PCIDevice *d = PCI_DEVICE(qdev);
+
+ pcie_cap_deverr_reset(d);
+ pcie_cap_slot_reset(d);
+ pcie_cap_arifwd_reset(d);
+ pci_bridge_reset(qdev);
+}
+
+static void pcie_downstream_realize(PCIDevice *d, Error **errp)
+{
+ PCIEPort *p = PCIE_PORT(d);
+ PCIESlot *s = PCIE_SLOT(d);
+ int rc;
+
+ pci_bridge_initfn(d, TYPE_PCIE_BUS);
+ pcie_port_init_reg(d);
+
+ rc = pci_bridge_vendor_init(d, REDHAT_PCIE_DOWNSTREAM_VENDOR_OFFSET,
+ PCI_DEVICE_ID_REDHAT_DOWNPORT_FAILOVER, errp);
+ if (rc < 0) {
+ error_append_hint(errp, "Can't init group ID, error %d\n", rc);
+ goto err_bridge;
+ }
+
+ rc = msi_init(d, REDHAT_PCIE_DOWNSTREAM_MSI_OFFSET,
+ REDHAT_PCIE_DOWNSTREAM_MSI_NR_VECTOR,
+ REDHAT_PCIE_DOWNSTREAM_MSI_SUPPORTED_FLAGS & PCI_MSI_FLAGS_64BIT,
+ REDHAT_PCIE_DOWNSTREAM_MSI_SUPPORTED_FLAGS & PCI_MSI_FLAGS_MASKBIT,
+ errp);
+ if (rc < 0) {
+ assert(rc == -ENOTSUP);
+ goto err_bridge;
+ }
+
+ rc = pci_bridge_ssvid_init(d, REDHAT_PCIE_DOWNSTREAM_SSVID_OFFSET,
+ REDHAT_PCIE_DOWNSTREAM_SSVID_SVID,
+ REDHAT_PCIE_DOWNSTREAM_SSVID_SSID, errp);
+ if (rc < 0) {
+ goto err_bridge;
+ }
+
+ rc = pcie_cap_init(d, REDHAT_PCIE_DOWNSTREAM_EXP_OFFSET,
+ PCI_EXP_TYPE_DOWNSTREAM, p->port, errp);
+ if (rc < 0) {
+ goto err_msi;
+ }
+ pcie_cap_flr_init(d);
+ pcie_cap_deverr_init(d);
+ pcie_cap_slot_init(d, s->slot);
+ pcie_cap_arifwd_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, REDHAT_PCIE_DOWNSTREAM_AER_OFFSET,
+ PCI_ERR_SIZEOF, errp);
+ if (rc < 0) {
+ goto err;
+ }
+
+ return;
+
+err:
+ pcie_chassis_del_slot(s);
+err_pcie_cap:
+ pcie_cap_exit(d);
+err_msi:
+ msi_uninit(d);
+err_bridge:
+ pci_bridge_exitfn(d);
+}
+
+static void pcie_downstream_exitfn(PCIDevice *d)
+{
+ PCIESlot *s = PCIE_SLOT(d);
+
+ pcie_aer_exit(d);
+ pcie_chassis_del_slot(s);
+ pcie_cap_exit(d);
+ msi_uninit(d);
+ pci_bridge_exitfn(d);
+}
+
+PCIESlot *pcie_downstream_init(PCIBus *bus, int devfn, bool multifunction,
+ const char *bus_name, pci_map_irq_fn map_irq,
+ uint8_t port, uint8_t chassis, uint16_t slot)
+{
+ PCIDevice *d;
+ PCIBridge *br;
+ DeviceState *qdev;
+
+ d = pci_create_multifunction(bus, devfn, multifunction, "pcie-downstream");
+ if (!d) {
+ return NULL;
+ }
+ br = PCI_BRIDGE(d);
+
+ qdev = DEVICE(d);
+ pci_bridge_map_irq(br, bus_name, map_irq);
+ qdev_prop_set_uint8(qdev, "port", port);
+ qdev_prop_set_uint8(qdev, "chassis", chassis);
+ qdev_prop_set_uint16(qdev, "slot", slot);
+ qdev_init_nofail(qdev);
+
+ return PCIE_SLOT(d);
+}
+
+static Property pcie_downstream_props[] = {
+ DEFINE_PROP_BIT(COMPAT_PROP_PCP, PCIDevice, cap_present,
+ QEMU_PCIE_SLTCAP_PCP_BITNR, true),
+ DEFINE_PROP_UINT64(COMPAT_PROP_FAILOVER_GROUP_ID,
+ PCIDevice, failover_group_id, ULLONG_MAX),
+ DEFINE_PROP_END_OF_LIST()
+};
+
+static const VMStateDescription vmstate_pcie_ds = {
+ .name = "pcie-downstream-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_END_OF_LIST()
+ }
+};
+
+static void pcie_downstream_class_init(ObjectClass *klass, void *data)
+{
+ DeviceClass *dc = DEVICE_CLASS(klass);
+ PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
+
+ k->is_bridge = 1;
+ k->config_write = pcie_downstream_write_config;
+ k->realize = pcie_downstream_realize;
+ k->exit = pcie_downstream_exitfn;
+ k->vendor_id = PCI_VENDOR_ID_REDHAT;
+ k->device_id = PCI_DEVICE_ID_REDHAT_DOWNPORT_FAILOVER;
+ k->revision = REDHAT_PCIE_DOWNSTREAM_REVISION;
+ set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories);
+ dc->desc = "Red Hat PCIe Downstream Port";
+ dc->reset = pcie_downstream_reset;
+ dc->vmsd = &vmstate_pcie_ds;
+ dc->props = pcie_downstream_props;
+}
+
+static const TypeInfo pcie_downstream_info = {
+ .name = "pcie-downstream",
+ .parent = TYPE_PCIE_SLOT,
+ .class_init = pcie_downstream_class_init,
+ .interfaces = (InterfaceInfo[]) {
+ { INTERFACE_PCIE_DEVICE },
+ { }
+ },
+};
+
+static void pcie_downstream_register_types(void)
+{
+ type_register_static(&pcie_downstream_info);
+}
+
+type_init(pcie_downstream_register_types)
diff --git a/hw/pci-bridge/pcie_downstream.h b/hw/pci-bridge/pcie_downstream.h
new file mode 100644
index 0000000000..a7f1aae4bb
--- /dev/null
+++ b/hw/pci-bridge/pcie_downstream.h
@@ -0,0 +1,10 @@
+#ifndef QEMU_PCIE_DOWNSTREAM_H
+#define QEMU_PCIE_DOWNSTREAM_H
+
+#include "hw/pci/pcie_port.h"
+
+PCIESlot *pcie_downstream_init(PCIBus *bus, int devfn, bool multifunction,
+ const char *bus_name, pci_map_irq_fn map_irq, uint8_t port,
+ uint8_t chassis, uint16_t slot);
+
+#endif /* QEMU_PCIE_DOWNSTREAM_H */
diff --git a/include/hw/pci/pci.h b/include/hw/pci/pci.h
index bc38032761..bf04ef59f3 100644
--- a/include/hw/pci/pci.h
+++ b/include/hw/pci/pci.h
@@ -103,6 +103,7 @@ extern bool pci_available;
#define PCI_DEVICE_ID_REDHAT_PCIE_BRIDGE 0x000e
#define PCI_DEVICE_ID_REDHAT_MDPY 0x000f
#define PCI_DEVICE_ID_REDHAT_BRIDGE_FAILOVER 0x0010
+#define PCI_DEVICE_ID_REDHAT_DOWNPORT_FAILOVER 0x0011
#define PCI_DEVICE_ID_REDHAT_QXL 0x0100
#define FMT_PCIBUS PRIx64
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