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 "ioh3420.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  */
  45 static 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
  63 static void ioh3420_aer_vector_update(PCIDevice *d)
  64 {
  65     pcie_aer_root_set_vector(d, ioh3420_aer_vector(d));
  66 }
  67
  68 static void ioh3420_write_config(PCIDevice *d,
  69                                    uint32_t address, uint32_t val, int len)
  70 {
  71     uint32_t root_cmd =
  72         pci_get_long(d->config + d->exp.aer_cap + PCI_ERR_ROOT_COMMAND);
  73
  74     pci_bridge_write_config(d, address, val, len);
  75     ioh3420_aer_vector_update(d);
  76     pcie_cap_slot_write_config(d, address, val, len);
  77     pcie_aer_write_config(d, address, val, len);
  78     pcie_aer_root_write_config(d, address, val, len, root_cmd);
  79 }
  80
  81 static void ioh3420_reset(DeviceState *qdev)
  82 {
  83     PCIDevice *d = PCI_DEVICE(qdev);
  84
  85     ioh3420_aer_vector_update(d);
  86     pcie_cap_root_reset(d);
  87     pcie_cap_deverr_reset(d);
  88     pcie_cap_slot_reset(d);
  89     pcie_cap_arifwd_reset(d);
  90     pcie_aer_root_reset(d);
  91     pci_bridge_reset(qdev);
  92     pci_bridge_disable_base_limit(d);
  93 }
  94
  95 static int ioh3420_initfn(PCIDevice *d)
  96 {
  97     PCIEPort *p = PCIE_PORT(d);
  98     PCIESlot *s = PCIE_SLOT(d);
  99     int rc;
 100
 101     pci_bridge_initfn(d, TYPE_PCIE_BUS);
 102     pcie_port_init_reg(d);
 103
 104     rc = pci_bridge_ssvid_init(d, IOH_EP_SSVID_OFFSET,
 105                                IOH_EP_SSVID_SVID, IOH_EP_SSVID_SSID);
 106     if (rc < 0) {
 107         goto err_bridge;
 108     }
 109     rc = msi_init(d, IOH_EP_MSI_OFFSET, IOH_EP_MSI_NR_VECTOR,
 110                   IOH_EP_MSI_SUPPORTED_FLAGS & PCI_MSI_FLAGS_64BIT,
 111                   IOH_EP_MSI_SUPPORTED_FLAGS & PCI_MSI_FLAGS_MASKBIT);
 112     if (rc < 0) {
 113         goto err_bridge;
 114     }
 115     rc = pcie_cap_init(d, IOH_EP_EXP_OFFSET, PCI_EXP_TYPE_ROOT_PORT, p->port);
 116     if (rc < 0) {
 117         goto err_msi;
 118     }
 119
 120     pcie_cap_arifwd_init(d);
 121     pcie_cap_deverr_init(d);
 122     pcie_cap_slot_init(d, s->slot);
 123     pcie_chassis_create(s->chassis);
 124     rc = pcie_chassis_add_slot(s);
 125     if (rc < 0) {
 126         goto err_pcie_cap;
 127     }
 128     pcie_cap_root_init(d);
 129     rc = pcie_aer_init(d, IOH_EP_AER_OFFSET);
 130     if (rc < 0) {
 131         goto err;
 132     }
 133     pcie_aer_root_init(d);
 134     ioh3420_aer_vector_update(d);
 135     return 0;
 136
 137 err:
 138     pcie_chassis_del_slot(s);
 139 err_pcie_cap:
 140     pcie_cap_exit(d);
 141 err_msi:
 142     msi_uninit(d);
 143 err_bridge:
 144     pci_bridge_exitfn(d);
 145     return rc;
 146 }
 147
 148 static void ioh3420_exitfn(PCIDevice *d)
 149 {
 150     PCIESlot *s = PCIE_SLOT(d);
 151
 152     pcie_aer_exit(d);
 153     pcie_chassis_del_slot(s);
 154     pcie_cap_exit(d);
 155     msi_uninit(d);
 156     pci_bridge_exitfn(d);
 157 }
 158
 159 static Property ioh3420_props[] = {
 160     DEFINE_PROP_BIT(COMPAT_PROP_PCP, PCIDevice, cap_present,
 161                     QEMU_PCIE_SLTCAP_PCP_BITNR, true),
 162     DEFINE_PROP_END_OF_LIST()
 163 };
 164
 165 static const VMStateDescription vmstate_ioh3420 = {
 166     .name = "ioh-3240-express-root-port",
 167     .version_id = 1,
 168     .minimum_version_id = 1,
 169     .post_load = pcie_cap_slot_post_load,
 170     .fields = (VMStateField[]) {
 171         VMSTATE_PCIE_DEVICE(parent_obj.parent_obj.parent_obj, PCIESlot),
 172         VMSTATE_STRUCT(parent_obj.parent_obj.parent_obj.exp.aer_log,
 173                        PCIESlot, 0, vmstate_pcie_aer_log, PCIEAERLog),
 174         VMSTATE_END_OF_LIST()
 175     }
 176 };
 177
 178 static void ioh3420_class_init(ObjectClass *klass, void *data)
 179 {
 180     DeviceClass *dc = DEVICE_CLASS(klass);
 181     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
 182
 183     k->is_express = 1;
 184     k->is_bridge = 1;
 185     k->config_write = ioh3420_write_config;
 186     k->init = ioh3420_initfn;
 187     k->exit = ioh3420_exitfn;
 188     k->vendor_id = PCI_VENDOR_ID_INTEL;
 189     k->device_id = PCI_DEVICE_ID_IOH_EPORT;
 190     k->revision = PCI_DEVICE_ID_IOH_REV;
 191     set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories);
 192     dc->desc = "Intel IOH device id 3420 PCIE Root Port";
 193     dc->reset = ioh3420_reset;
 194     dc->vmsd = &vmstate_ioh3420;
 195     dc->props = ioh3420_props;
 196 }
 197
 198 static const TypeInfo ioh3420_info = {
 199     .name          = "ioh3420",
 200     .parent        = TYPE_PCIE_SLOT,
 201     .class_init    = ioh3420_class_init,
 202 };
 203
 204 static void ioh3420_register_types(void)
 205 {
 206     type_register_static(&ioh3420_info);
 207 }
 208
 209 type_init(ioh3420_register_types)
 210
 211 /*
 212  * Local variables:
 213  *  c-indent-level: 4
 214  *  c-basic-offset: 4
 215  *  tab-width: 8
 216  *  indent-tab-mode: nil
 217  * End:
 218  */