LXR qemu/hw/pci-bridge/ioh3420.c

   1/*
   2 * ioh3420.c
   3 * Intel X58 north bridge IOH
   4 * PCI Express root port device id 3420
   5 *
   6 * Copyright (c) 2010 Isaku Yamahata <yamahata at valinux co jp>
   7 *                    VA Linux Systems Japan K.K.
   8 *
   9 * This program is free software; you can redistribute it and/or modify
  10 * it under the terms of the GNU General Public License as published by
  11 * the Free Software Foundation; either version 2 of the License, or
  12 * (at your option) any later version.
  13 *
  14 * This program is distributed in the hope that it will be useful,
  15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17 * GNU General Public License for more details.
  18 *
  19 * You should have received a copy of the GNU General Public License along
  20 * with this program; if not, see <http://www.gnu.org/licenses/>.
  21 */
  22
  23#include "qemu/osdep.h"
  24#include "hw/pci/pci_ids.h"
  25#include "hw/pci/msi.h"
  26#include "hw/pci/pcie.h"
  27#include "hw/pci/pcie_port.h"
  28
  29#define PCI_DEVICE_ID_IOH_EPORT         0x3420  /* D0:F0 express mode */
  30#define PCI_DEVICE_ID_IOH_REV           0x2
  31#define IOH_EP_SSVID_OFFSET             0x40
  32#define IOH_EP_SSVID_SVID               PCI_VENDOR_ID_INTEL
  33#define IOH_EP_SSVID_SSID               0
  34#define IOH_EP_MSI_OFFSET               0x60
  35#define IOH_EP_MSI_SUPPORTED_FLAGS      PCI_MSI_FLAGS_MASKBIT
  36#define IOH_EP_MSI_NR_VECTOR            2
  37#define IOH_EP_EXP_OFFSET               0x90
  38#define IOH_EP_AER_OFFSET               0x100
  39
  40/*
  41 * If two MSI vector are allocated, Advanced Error Interrupt Message Number
  42 * is 1. otherwise 0.
  43 * 17.12.5.10 RPERRSTS,  32:27 bit Advanced Error Interrupt Message Number.
  44 */
  45static uint8_t ioh3420_aer_vector(const PCIDevice *d)
  46{
  47    switch (msi_nr_vectors_allocated(d)) {
  48    case 1:
  49        return 0;
  50    case 2:
  51        return 1;
  52    case 4:
  53    case 8:
  54    case 16:
  55    case 32:
  56    default:
  57        break;
  58    }
  59    abort();
  60    return 0;
  61}
  62
  63static int ioh3420_interrupts_init(PCIDevice *d, Error **errp)
  64{
  65    int rc;
  66
  67    rc = msi_init(d, IOH_EP_MSI_OFFSET, IOH_EP_MSI_NR_VECTOR,
  68                  IOH_EP_MSI_SUPPORTED_FLAGS & PCI_MSI_FLAGS_64BIT,
  69                  IOH_EP_MSI_SUPPORTED_FLAGS & PCI_MSI_FLAGS_MASKBIT,
  70                  errp);
  71    if (rc < 0) {
  72        assert(rc == -ENOTSUP);
  73    }
  74
  75    return rc;
  76}
  77
  78static void ioh3420_interrupts_uninit(PCIDevice *d)
  79{
  80    msi_uninit(d);
  81}
  82
  83static const VMStateDescription vmstate_ioh3420 = {
  84    .name = "ioh-3240-express-root-port",
  85    .priority = MIG_PRI_PCI_BUS,
  86    .version_id = 1,
  87    .minimum_version_id = 1,
  88    .post_load = pcie_cap_slot_post_load,
  89    .fields = (VMStateField[]) {
  90        VMSTATE_PCI_DEVICE(parent_obj.parent_obj.parent_obj, PCIESlot),
  91        VMSTATE_STRUCT(parent_obj.parent_obj.parent_obj.exp.aer_log,
  92                       PCIESlot, 0, vmstate_pcie_aer_log, PCIEAERLog),
  93        VMSTATE_END_OF_LIST()
  94    }
  95};
  96
  97static void ioh3420_class_init(ObjectClass *klass, void *data)
  98{
  99    DeviceClass *dc = DEVICE_CLASS(klass);
 100    PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
 101    PCIERootPortClass *rpc = PCIE_ROOT_PORT_CLASS(klass);
 102
 103    k->vendor_id = PCI_VENDOR_ID_INTEL;
 104    k->device_id = PCI_DEVICE_ID_IOH_EPORT;
 105    k->revision = PCI_DEVICE_ID_IOH_REV;
 106    dc->desc = "Intel IOH device id 3420 PCIE Root Port";
 107    dc->vmsd = &vmstate_ioh3420;
 108    rpc->aer_vector = ioh3420_aer_vector;
 109    rpc->interrupts_init = ioh3420_interrupts_init;
 110    rpc->interrupts_uninit = ioh3420_interrupts_uninit;
 111    rpc->exp_offset = IOH_EP_EXP_OFFSET;
 112    rpc->aer_offset = IOH_EP_AER_OFFSET;
 113    rpc->ssvid_offset = IOH_EP_SSVID_OFFSET;
 114    rpc->ssid = IOH_EP_SSVID_SSID;
 115}
 116
 117static const TypeInfo ioh3420_info = {
 118    .name          = "ioh3420",
 119    .parent        = TYPE_PCIE_ROOT_PORT,
 120    .class_init    = ioh3420_class_init,
 121};
 122
 123static void ioh3420_register_types(void)
 124{
 125    type_register_static(&ioh3420_info);
 126}
 127
 128type_init(ioh3420_register_types)
 129