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 #include "qapi/error.h"
  29
  30 #define PCI_DEVICE_ID_IOH_EPORT         0x3420  /* D0:F0 express mode */
  31 #define PCI_DEVICE_ID_IOH_REV           0x2
  32 #define IOH_EP_SSVID_OFFSET             0x40
  33 #define IOH_EP_SSVID_SVID               PCI_VENDOR_ID_INTEL
  34 #define IOH_EP_SSVID_SSID               0
  35 #define IOH_EP_MSI_OFFSET               0x60
  36 #define IOH_EP_MSI_SUPPORTED_FLAGS      PCI_MSI_FLAGS_MASKBIT
  37 #define IOH_EP_MSI_NR_VECTOR            2
  38 #define IOH_EP_EXP_OFFSET               0x90
  39 #define IOH_EP_AER_OFFSET               0x100
  40
  41 /*
  42  * If two MSI vector are allocated, Advanced Error Interrupt Message Number
  43  * is 1. otherwise 0.
  44  * 17.12.5.10 RPERRSTS,  32:27 bit Advanced Error Interrupt Message Number.
  45  */
  46 static uint8_t ioh3420_aer_vector(const PCIDevice *d)
  47 {
  48     switch (msi_nr_vectors_allocated(d)) {
  49     case 1:
  50         return 0;
  51     case 2:
  52         return 1;
  53     case 4:
  54     case 8:
  55     case 16:
  56     case 32:
  57     default:
  58         break;
  59     }
  60     abort();
  61     return 0;
  62 }
  63
  64 static void ioh3420_aer_vector_update(PCIDevice *d)
  65 {
  66     pcie_aer_root_set_vector(d, ioh3420_aer_vector(d));
  67 }
  68
  69 static void ioh3420_write_config(PCIDevice *d,
  70                                    uint32_t address, uint32_t val, int len)
  71 {
  72     uint32_t root_cmd =
  73         pci_get_long(d->config + d->exp.aer_cap + PCI_ERR_ROOT_COMMAND);
  74
  75     pci_bridge_write_config(d, address, val, len);
  76     ioh3420_aer_vector_update(d);
  77     pcie_cap_slot_write_config(d, address, val, len);
  78     pcie_aer_write_config(d, address, val, len);
  79     pcie_aer_root_write_config(d, address, val, len, root_cmd);
  80 }
  81
  82 static void ioh3420_reset(DeviceState *qdev)
  83 {
  84     PCIDevice *d = PCI_DEVICE(qdev);
  85
  86     ioh3420_aer_vector_update(d);
  87     pcie_cap_root_reset(d);
  88     pcie_cap_deverr_reset(d);
  89     pcie_cap_slot_reset(d);
  90     pcie_cap_arifwd_reset(d);
  91     pcie_aer_root_reset(d);
  92     pci_bridge_reset(qdev);
  93     pci_bridge_disable_base_limit(d);
  94 }
  95
  96 static int ioh3420_initfn(PCIDevice *d)
  97 {
  98     PCIEPort *p = PCIE_PORT(d);
  99     PCIESlot *s = PCIE_SLOT(d);
 100     int rc;
 101     Error *err = NULL;
 102
 103     pci_config_set_interrupt_pin(d->config, 1);
 104     pci_bridge_initfn(d, TYPE_PCIE_BUS);
 105     pcie_port_init_reg(d);
 106
 107     rc = pci_bridge_ssvid_init(d, IOH_EP_SSVID_OFFSET,
 108                                IOH_EP_SSVID_SVID, IOH_EP_SSVID_SSID);
 109     if (rc < 0) {
 110         goto err_bridge;
 111     }
 112
 113     rc = msi_init(d, IOH_EP_MSI_OFFSET, IOH_EP_MSI_NR_VECTOR,
 114                   IOH_EP_MSI_SUPPORTED_FLAGS & PCI_MSI_FLAGS_64BIT,
 115                   IOH_EP_MSI_SUPPORTED_FLAGS & PCI_MSI_FLAGS_MASKBIT, &err);
 116     if (rc < 0) {
 117         assert(rc == -ENOTSUP);
 118         error_report_err(err);
 119         goto err_bridge;
 120     }
 121
 122     rc = pcie_cap_init(d, IOH_EP_EXP_OFFSET, PCI_EXP_TYPE_ROOT_PORT, p->port);
 123     if (rc < 0) {
 124         goto err_msi;
 125     }
 126
 127     pcie_cap_arifwd_init(d);
 128     pcie_cap_deverr_init(d);
 129     pcie_cap_slot_init(d, s->slot);
 130     pcie_cap_root_init(d);
 131
 132     pcie_chassis_create(s->chassis);
 133     rc = pcie_chassis_add_slot(s);
 134     if (rc < 0) {
 135         goto err_pcie_cap;
 136     }
 137
 138     rc = pcie_aer_init(d, IOH_EP_AER_OFFSET, PCI_ERR_SIZEOF);
 139     if (rc < 0) {
 140         goto err;
 141     }
 142     pcie_aer_root_init(d);
 143     ioh3420_aer_vector_update(d);
 144
 145     return 0;
 146
 147 err:
 148     pcie_chassis_del_slot(s);
 149 err_pcie_cap:
 150     pcie_cap_exit(d);
 151 err_msi:
 152     msi_uninit(d);
 153 err_bridge:
 154     pci_bridge_exitfn(d);
 155     return rc;
 156 }
 157
 158 static void ioh3420_exitfn(PCIDevice *d)
 159 {
 160     PCIESlot *s = PCIE_SLOT(d);
 161
 162     pcie_aer_exit(d);
 163     pcie_chassis_del_slot(s);
 164     pcie_cap_exit(d);
 165     msi_uninit(d);
 166     pci_bridge_exitfn(d);
 167 }
 168
 169 static Property ioh3420_props[] = {
 170     DEFINE_PROP_BIT(COMPAT_PROP_PCP, PCIDevice, cap_present,
 171                     QEMU_PCIE_SLTCAP_PCP_BITNR, true),
 172     DEFINE_PROP_END_OF_LIST()
 173 };
 174
 175 static const VMStateDescription vmstate_ioh3420 = {
 176     .name = "ioh-3240-express-root-port",
 177     .version_id = 1,
 178     .minimum_version_id = 1,
 179     .post_load = pcie_cap_slot_post_load,
 180     .fields = (VMStateField[]) {
 181         VMSTATE_PCIE_DEVICE(parent_obj.parent_obj.parent_obj, PCIESlot),
 182         VMSTATE_STRUCT(parent_obj.parent_obj.parent_obj.exp.aer_log,
 183                        PCIESlot, 0, vmstate_pcie_aer_log, PCIEAERLog),
 184         VMSTATE_END_OF_LIST()
 185     }
 186 };
 187
 188 static void ioh3420_class_init(ObjectClass *klass, void *data)
 189 {
 190     DeviceClass *dc = DEVICE_CLASS(klass);
 191     PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
 192
 193     k->is_express = 1;
 194     k->is_bridge = 1;
 195     k->config_write = ioh3420_write_config;
 196     k->init = ioh3420_initfn;
 197     k->exit = ioh3420_exitfn;
 198     k->vendor_id = PCI_VENDOR_ID_INTEL;
 199     k->device_id = PCI_DEVICE_ID_IOH_EPORT;
 200     k->revision = PCI_DEVICE_ID_IOH_REV;
 201     set_bit(DEVICE_CATEGORY_BRIDGE, dc->categories);
 202     dc->desc = "Intel IOH device id 3420 PCIE Root Port";
 203     dc->reset = ioh3420_reset;
 204     dc->vmsd = &vmstate_ioh3420;
 205     dc->props = ioh3420_props;
 206 }
 207
 208 static const TypeInfo ioh3420_info = {
 209     .name          = "ioh3420",
 210     .parent        = TYPE_PCIE_SLOT,
 211     .class_init    = ioh3420_class_init,
 212 };
 213
 214 static void ioh3420_register_types(void)
 215 {
 216     type_register_static(&ioh3420_info);
 217 }
 218
 219 type_init(ioh3420_register_types)