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 #include "migration/vmstate.h"
  29 #include "qemu/module.h"
  30
  31 #define PCI_DEVICE_ID_IOH_EPORT         0x3420  /* D0:F0 express mode */
  32 #define PCI_DEVICE_ID_IOH_REV           0x2
  33 #define IOH_EP_SSVID_OFFSET             0x40
  34 #define IOH_EP_SSVID_SVID               PCI_VENDOR_ID_INTEL
  35 #define IOH_EP_SSVID_SSID               0
  36 #define IOH_EP_MSI_OFFSET               0x60
  37 #define IOH_EP_MSI_SUPPORTED_FLAGS      PCI_MSI_FLAGS_MASKBIT
  38 #define IOH_EP_MSI_NR_VECTOR            2
  39 #define IOH_EP_EXP_OFFSET               0x90
  40 #define IOH_EP_AER_OFFSET               0x100
  41
  42 /*
  43  * If two MSI vector are allocated, Advanced Error Interrupt Message Number
  44  * is 1. otherwise 0.
  45  * 17.12.5.10 RPERRSTS,  32:27 bit Advanced Error Interrupt Message Number.
  46  */
  47 static uint8_t ioh3420_aer_vector(const PCIDevice *d)
  48 {
  49     switch (msi_nr_vectors_allocated(d)) {
  50     case 1:
  51         return 0;
  52     case 2:
  53         return 1;
  54     case 4:
  55     case 8:
  56     case 16:
  57     case 32:
  58     default:
  59         break;
  60     }
  61     abort();
  62     return 0;
  63 }
  64
  65 static int ioh3420_interrupts_init(PCIDevice *d, Error **errp)
  66 {
  67     int rc;
  68
  69     rc = msi_init(d, IOH_EP_MSI_OFFSET, IOH_EP_MSI_NR_VECTOR,
  70                   IOH_EP_MSI_SUPPORTED_FLAGS & PCI_MSI_FLAGS_64BIT,
  71                   IOH_EP_MSI_SUPPORTED_FLAGS & PCI_MSI_FLAGS_MASKBIT,
  72                   errp);
  73     if (rc < 0) {
  74         assert(rc == -ENOTSUP);
  75     }
  76
  77     return rc;
  78 }
  79
  80 static void ioh3420_interrupts_uninit(PCIDevice *d)
  81 {
  82     msi_uninit(d);
  83 }
  84
  85 static const VMStateDescription vmstate_ioh3420 = {
  86     .name = "ioh-3240-express-root-port",
  87     .priority = MIG_PRI_PCI_BUS,
  88     .version_id = 1,
  89     .minimum_version_id = 1,
  90     .post_load = pcie_cap_slot_post_load,
  91     .fields = (VMStateField[]) {
  92         VMSTATE_PCI_DEVICE(parent_obj.parent_obj.parent_obj, PCIESlot),
  93         VMSTATE_STRUCT(parent_obj.parent_obj.parent_obj.exp.aer_log,
  94                        PCIESlot, 0, vmstate_pcie_aer_log, PCIEAERLog),
  95         VMSTATE_END_OF_LIST()
  96     }
  97 };
  98
  99 static void ioh3420_class_init(ObjectClass *klass, void *data)
 100 {
 101     DeviceClass *dc = DEVICE_CLASS(klass);
 102     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
 103     PCIERootPortClass *rpc = PCIE_ROOT_PORT_CLASS(klass);
 104
 105     k->vendor_id = PCI_VENDOR_ID_INTEL;
 106     k->device_id = PCI_DEVICE_ID_IOH_EPORT;
 107     k->revision = PCI_DEVICE_ID_IOH_REV;
 108     dc->desc = "Intel IOH device id 3420 PCIE Root Port";
 109     dc->vmsd = &vmstate_ioh3420;
 110     rpc->aer_vector = ioh3420_aer_vector;
 111     rpc->interrupts_init = ioh3420_interrupts_init;
 112     rpc->interrupts_uninit = ioh3420_interrupts_uninit;
 113     rpc->exp_offset = IOH_EP_EXP_OFFSET;
 114     rpc->aer_offset = IOH_EP_AER_OFFSET;
 115     rpc->ssvid_offset = IOH_EP_SSVID_OFFSET;
 116     rpc->ssid = IOH_EP_SSVID_SSID;
 117 }
 118
 119 static const TypeInfo ioh3420_info = {
 120     .name          = "ioh3420",
 121     .parent        = TYPE_PCIE_ROOT_PORT,
 122     .class_init    = ioh3420_class_init,
 123 };
 124
 125 static void ioh3420_register_types(void)
 126 {
 127     type_register_static(&ioh3420_info);
 128 }
 129
 130 type_init(ioh3420_register_types)