The 'base' PCI Express Root Port includes
the common code to be re-used for all
Root Ports implementations. Most of the code
was taken from the current implementation
of Intel's IOH 3420 Root Port.
Signed-off-by: Marcel Apfelbaum <mar...@redhat.com>
---
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_root_port.c | 193 +++++++++++++++++++++++++++++++++++++
include/hw/pci/pcie_port.h | 18 ++++
6 files changed, 215 insertions(+)
create mode 100644 hw/pci-bridge/pcie_root_port.c
diff --git a/default-configs/arm-softmmu.mak b/default-configs/arm-softmmu.mak
index 6de3e16..6f2a180 100644
--- a/default-configs/arm-softmmu.mak
+++ b/default-configs/arm-softmmu.mak
@@ -108,6 +108,7 @@ CONFIG_FSL_IMX25=y
CONFIG_IMX_I2C=y
+CONFIG_PCIE_PORT=y
CONFIG_XIO3130=y
CONFIG_IOH3420=y
CONFIG_I82801B11=y
diff --git a/default-configs/i386-softmmu.mak b/default-configs/i386-softmmu.mak
index 0b51360..9288838 100644
--- a/default-configs/i386-softmmu.mak
+++ b/default-configs/i386-softmmu.mak
@@ -51,6 +51,7 @@ CONFIG_PVPANIC=y
CONFIG_MEM_HOTPLUG=y
CONFIG_NVDIMM=y
CONFIG_ACPI_NVDIMM=y
+CONFIG_PCIE_PORT=y
CONFIG_XIO3130=y
CONFIG_IOH3420=y
CONFIG_I82801B11=y
diff --git a/default-configs/x86_64-softmmu.mak
b/default-configs/x86_64-softmmu.mak
index 7f89503..7d2c2d4 100644
--- a/default-configs/x86_64-softmmu.mak
+++ b/default-configs/x86_64-softmmu.mak
@@ -51,6 +51,7 @@ CONFIG_PVPANIC=y
CONFIG_MEM_HOTPLUG=y
CONFIG_NVDIMM=y
CONFIG_ACPI_NVDIMM=y
+CONFIG_PCIE_PORT=y
CONFIG_XIO3130=y
CONFIG_IOH3420=y
CONFIG_I82801B11=y
diff --git a/hw/pci-bridge/Makefile.objs b/hw/pci-bridge/Makefile.objs
index f2adfe3..4f2039f 100644
--- a/hw/pci-bridge/Makefile.objs
+++ b/hw/pci-bridge/Makefile.objs
@@ -1,5 +1,6 @@
common-obj-y += pci_bridge_dev.o
common-obj-y += pci_expander_bridge.o
+common-obj-$(CONFIG_PCIE_PORT) += pcie_root_port.o
common-obj-$(CONFIG_XIO3130) += xio3130_upstream.o xio3130_downstream.o
common-obj-$(CONFIG_IOH3420) += ioh3420.o
common-obj-$(CONFIG_I82801B11) += i82801b11.o
diff --git a/hw/pci-bridge/pcie_root_port.c b/hw/pci-bridge/pcie_root_port.c
new file mode 100644
index 0000000..79fb249
--- /dev/null
+++ b/hw/pci-bridge/pcie_root_port.c
@@ -0,0 +1,193 @@
+/*
+ * Generic PCI Express Root Port emulation
+ *
+ * Copyright (C) 2016 Red Hat Inc
+ *
+ * Authors:
+ * Marcel Apfelbaum <mar...@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 "hw/pci/pcie_port.h"
+#include "hw/pci/msi.h"
+
+#define PCIE_ROOT_PORT_MSI_VECTORS 2
+#define PCIE_ROOT_PORT_MSI_SUPPORTED_FLAGS PCI_MSI_FLAGS_MASKBIT
+#define PCIE_ROOT_PORT_AER_OFFSET 0x100
+
+/*
+ * If two MSI vector are allocated, Advanced Error Interrupt Message Number
+ * is 1. otherwise 0.
+ * 17.12.5.10 RPERRSTS, 32:27 bit Advanced Error Interrupt Message Number.
+ */
+static uint8_t rp_aer_vector(const PCIDevice *d)
+{
+ switch (msi_nr_vectors_allocated(d)) {
+ case 1:
+ return 0;
+ case 2:
+ return 1;
+ case 4:
+ case 8:
+ case 16:
+ case 32:
+ default:
+ break;
+ }
+ abort();
+ return 0;
+}
+
+static void rp_aer_vector_update(PCIDevice *d)
+{
+ pcie_aer_root_set_vector(d, rp_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);
+
+ pci_bridge_write_config(d, address, val, len);
+ rp_aer_vector_update(d);
+ pcie_cap_slot_write_config(d, 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(DeviceState *qdev)
+{
+ PCIDevice *d = PCI_DEVICE(qdev);
+
+ 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_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;
+ Error *local_err = NULL;
+
+ pci_config_set_interrupt_pin(d->config, 1);
+ 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);
+ if (rc < 0) {
+ error_setg(errp, "Can't init SSV ID, error %d", rc);
+ goto err_bridge;
+ }
+
+ rc = msi_init(d, rpc->msi_offset, PCIE_ROOT_PORT_MSI_VECTORS,
+ PCIE_ROOT_PORT_MSI_SUPPORTED_FLAGS & PCI_MSI_FLAGS_64BIT,
+ PCIE_ROOT_PORT_MSI_SUPPORTED_FLAGS & PCI_MSI_FLAGS_MASKBIT,
+ &local_err);
+ if (rc < 0) {
+ assert(rc == -ENOTSUP);
+ error_propagate(errp, local_err);
+ goto err_bridge;
+ }
+
+ rc = pcie_cap_init(d, rpc->exp_offset, PCI_EXP_TYPE_ROOT_PORT, p->port);
+ if (rc < 0) {
+ error_setg(errp, "Can't add Root Port capability, error %d", rc);
+ goto err_msi;
+ }
+
+ pcie_cap_arifwd_init(d);
+ pcie_cap_deverr_init(d);
+ pcie_cap_slot_init(d, s->slot);
+ 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, rpc->aer_offset, PCI_ERR_SIZEOF);
+ if (rc < 0) {
+ error_setg(errp, "Can't init AER, error %d", rc);
+ goto err;
+ }
+ pcie_aer_root_init(d);
+ rp_aer_vector_update(d);
+
+ 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 rp_exit(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);
+}
+
+static Property rp_props[] = {
+ DEFINE_PROP_BIT(COMPAT_PROP_PCP, PCIDevice, cap_present,
+ QEMU_PCIE_SLTCAP_PCP_BITNR, true),
+ DEFINE_PROP_END_OF_LIST()
+};
+
+static void rp_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->is_express = 1;
+ k->is_bridge = 1;
+ k->config_write = rp_write_config;
+ k->realize = rp_realize;
+ k->exit = rp_exit;
+ set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories);
+ dc->reset = rp_reset;
+ dc->props = rp_props;
+ rpc->aer_offset = PCIE_ROOT_PORT_AER_OFFSET;
+}
+
+static const TypeInfo rp_info = {
+ .name = TYPE_PCIE_ROOT_PORT,
+ .parent = TYPE_PCIE_SLOT,
+ .class_init = rp_class_init,
+ .abstract = true,
+ .class_size = sizeof(PCIERootPortClass),
+};
+
+static void rp_register_types(void)
+{
+ type_register_static(&rp_info);
+}
+
+type_init(rp_register_types)
diff --git a/include/hw/pci/pcie_port.h b/include/hw/pci/pcie_port.h
index f7b64db..a8eee56 100644
--- a/include/hw/pci/pcie_port.h
+++ b/include/hw/pci/pcie_port.h
@@ -57,4 +57,22 @@ PCIESlot *pcie_chassis_find_slot(uint8_t chassis, uint16_t
slot);
int pcie_chassis_add_slot(struct PCIESlot *slot);
void pcie_chassis_del_slot(PCIESlot *s);
+#define TYPE_PCIE_ROOT_PORT "pcie-root-port-base"
+#define PCIE_ROOT_PORT_CLASS(klass) \
+ OBJECT_CLASS_CHECK(PCIERootPortClass, (klass), TYPE_PCIE_ROOT_PORT)
+#define PCIE_ROOT_PORT_CLASS(klass) \
+ OBJECT_CLASS_CHECK(PCIERootPortClass, (klass), TYPE_PCIE_ROOT_PORT)
+#define PCIE_ROOT_PORT_GET_CLASS(obj) \
+ OBJECT_GET_CLASS(PCIERootPortClass, (obj), TYPE_PCIE_ROOT_PORT)
+
+typedef struct PCIERootPortClass {
+ PCIDeviceClass parent_class;
+
+ int msi_offset;
+ int exp_offset;
+ int aer_offset;
+ int ssvid_offset;
+ int ssid;
+} PCIERootPortClass;
+
#endif /* QEMU_PCIE_PORT_H */
--
2.5.5
