f7d6f3fac8
The Generic Root Port behaves almost the same as the
Intel's IOH device with id 3420, without having
Intel specific attributes.
The device has two purposes:
(1) Can be used on both X86 and ARM machines.
(2) It will allow us to tweak the behaviour
(e.g add vendor-specific PCI capabilities)
- something that obviously cannot be done
on a known device.
Signed-off-by: Marcel Apfelbaum <marcel@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Tested-by: Andrea Bolognani <abologna@redhat.com>
89 lines
2.3 KiB
C
89 lines
2.3 KiB
C
/*
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* Generic PCI Express Root Port emulation
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*
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* Copyright (C) 2017 Red Hat Inc
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*
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* Authors:
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* Marcel Apfelbaum <marcel@redhat.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or later.
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* See the COPYING file in the top-level directory.
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*/
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#include "qemu/osdep.h"
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#include "qapi/error.h"
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#include "hw/pci/msix.h"
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#include "hw/pci/pcie_port.h"
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#define TYPE_GEN_PCIE_ROOT_PORT "pcie-root-port"
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#define GEN_PCIE_ROOT_PORT_AER_OFFSET 0x100
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#define GEN_PCIE_ROOT_PORT_MSIX_NR_VECTOR 1
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static uint8_t gen_rp_aer_vector(const PCIDevice *d)
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{
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return 0;
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}
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static int gen_rp_interrupts_init(PCIDevice *d, Error **errp)
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{
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int rc;
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rc = msix_init_exclusive_bar(d, GEN_PCIE_ROOT_PORT_MSIX_NR_VECTOR, 0);
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if (rc < 0) {
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assert(rc == -ENOTSUP);
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error_setg(errp, "Unable to init msix vectors");
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} else {
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msix_vector_use(d, 0);
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}
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return rc;
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}
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static void gen_rp_interrupts_uninit(PCIDevice *d)
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{
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msix_uninit_exclusive_bar(d);
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}
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static const VMStateDescription vmstate_rp_dev = {
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.name = "pcie-root-port",
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.version_id = 1,
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.minimum_version_id = 1,
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.post_load = pcie_cap_slot_post_load,
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.fields = (VMStateField[]) {
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VMSTATE_PCI_DEVICE(parent_obj.parent_obj.parent_obj, PCIESlot),
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VMSTATE_STRUCT(parent_obj.parent_obj.parent_obj.exp.aer_log,
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PCIESlot, 0, vmstate_pcie_aer_log, PCIEAERLog),
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VMSTATE_END_OF_LIST()
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}
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};
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static void gen_rp_dev_class_init(ObjectClass *klass, void *data)
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{
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DeviceClass *dc = DEVICE_CLASS(klass);
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PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
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PCIERootPortClass *rpc = PCIE_ROOT_PORT_CLASS(klass);
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k->vendor_id = PCI_VENDOR_ID_REDHAT;
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k->device_id = PCI_DEVICE_ID_REDHAT_PCIE_RP;
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dc->desc = "PCI Express Root Port";
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dc->vmsd = &vmstate_rp_dev;
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rpc->aer_vector = gen_rp_aer_vector;
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rpc->interrupts_init = gen_rp_interrupts_init;
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rpc->interrupts_uninit = gen_rp_interrupts_uninit;
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rpc->aer_offset = GEN_PCIE_ROOT_PORT_AER_OFFSET;
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}
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static const TypeInfo gen_rp_dev_info = {
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.name = TYPE_GEN_PCIE_ROOT_PORT,
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.parent = TYPE_PCIE_ROOT_PORT,
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.class_init = gen_rp_dev_class_init,
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};
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static void gen_rp_register_types(void)
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{
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type_register_static(&gen_rp_dev_info);
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}
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type_init(gen_rp_register_types)
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