LXR qemu/hw/ipmi/pci_ipmi

   1/*
   2 * QEMU PCI IPMI KCS emulation
   3 *
   4 * Copyright (c) 2017 Corey Minyard, MontaVista Software, LLC
   5 *
   6 * Permission is hereby granted, free of charge, to any person obtaining a copy
   7 * of this software and associated documentation files (the "Software"), to deal
   8 * in the Software without restriction, including without limitation the rights
   9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  10 * copies of the Software, and to permit persons to whom the Software is
  11 * furnished to do so, subject to the following conditions:
  12 *
  13 * The above copyright notice and this permission notice shall be included in
  14 * all copies or substantial portions of the Software.
  15 *
  16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  22 * THE SOFTWARE.
  23 */
  24#include "qemu/osdep.h"
  25#include "migration/vmstate.h"
  26#include "qapi/error.h"
  27#include "hw/ipmi/ipmi_kcs.h"
  28#include "hw/pci/pci.h"
  29
  30#define TYPE_PCI_IPMI_KCS "pci-ipmi-kcs"
  31#define PCI_IPMI_KCS(obj) OBJECT_CHECK(PCIIPMIKCSDevice, (obj), \
  32                                       TYPE_PCI_IPMI_KCS)
  33
  34typedef struct PCIIPMIKCSDevice {
  35    PCIDevice dev;
  36    IPMIKCS kcs;
  37    bool irq_enabled;
  38    uint32_t uuid;
  39} PCIIPMIKCSDevice;
  40
  41static void pci_ipmi_raise_irq(IPMIKCS *ik)
  42{
  43    PCIIPMIKCSDevice *pik = ik->opaque;
  44
  45    pci_set_irq(&pik->dev, true);
  46}
  47
  48static void pci_ipmi_lower_irq(IPMIKCS *ik)
  49{
  50    PCIIPMIKCSDevice *pik = ik->opaque;
  51
  52    pci_set_irq(&pik->dev, false);
  53}
  54
  55static void pci_ipmi_kcs_realize(PCIDevice *pd, Error **errp)
  56{
  57    PCIIPMIKCSDevice *pik = PCI_IPMI_KCS(pd);
  58    IPMIInterface *ii = IPMI_INTERFACE(pd);
  59    IPMIInterfaceClass *iic = IPMI_INTERFACE_GET_CLASS(ii);
  60
  61    if (!pik->kcs.bmc) {
  62        error_setg(errp, "IPMI device requires a bmc attribute to be set");
  63        return;
  64    }
  65
  66    pik->uuid = ipmi_next_uuid();
  67
  68    pik->kcs.bmc->intf = ii;
  69    pik->kcs.opaque = pik;
  70
  71    pci_config_set_prog_interface(pd->config, 0x01); /* KCS */
  72    pci_config_set_interrupt_pin(pd->config, 0x01);
  73    pik->kcs.use_irq = 1;
  74    pik->kcs.raise_irq = pci_ipmi_raise_irq;
  75    pik->kcs.lower_irq = pci_ipmi_lower_irq;
  76
  77    iic->init(ii, 8, errp);
  78    if (*errp) {
  79        return;
  80    }
  81    pci_register_bar(pd, 0, PCI_BASE_ADDRESS_SPACE_IO, &pik->kcs.io);
  82}
  83
  84const VMStateDescription vmstate_PCIIPMIKCSDevice = {
  85    .name = TYPE_IPMI_INTERFACE_PREFIX "pci-kcs",
  86    .version_id = 1,
  87    .minimum_version_id = 1,
  88    .fields      = (VMStateField[]) {
  89        VMSTATE_PCI_DEVICE(dev, PCIIPMIKCSDevice),
  90        VMSTATE_STRUCT(kcs, PCIIPMIKCSDevice, 1, vmstate_IPMIKCS, IPMIKCS),
  91        VMSTATE_END_OF_LIST()
  92    }
  93};
  94
  95static void pci_ipmi_kcs_instance_init(Object *obj)
  96{
  97    PCIIPMIKCSDevice *pik = PCI_IPMI_KCS(obj);
  98
  99    ipmi_bmc_find_and_link(obj, (Object **) &pik->kcs.bmc);
 100}
 101
 102static void *pci_ipmi_kcs_get_backend_data(IPMIInterface *ii)
 103{
 104    PCIIPMIKCSDevice *pik = PCI_IPMI_KCS(ii);
 105
 106    return &pik->kcs;
 107}
 108
 109static void pci_ipmi_kcs_class_init(ObjectClass *oc, void *data)
 110{
 111    DeviceClass *dc = DEVICE_CLASS(oc);
 112    PCIDeviceClass *pdc = PCI_DEVICE_CLASS(oc);
 113    IPMIInterfaceClass *iic = IPMI_INTERFACE_CLASS(oc);
 114
 115    pdc->vendor_id = PCI_VENDOR_ID_QEMU;
 116    pdc->device_id = PCI_DEVICE_ID_QEMU_IPMI;
 117    pdc->revision = 1;
 118    pdc->class_id = PCI_CLASS_SERIAL_IPMI;
 119
 120    dc->vmsd = &vmstate_PCIIPMIKCSDevice;
 121    dc->desc = "PCI IPMI KCS";
 122    pdc->realize = pci_ipmi_kcs_realize;
 123
 124    iic->get_backend_data = pci_ipmi_kcs_get_backend_data;
 125    ipmi_kcs_class_init(iic);
 126}
 127
 128static const TypeInfo pci_ipmi_kcs_info = {
 129    .name          = TYPE_PCI_IPMI_KCS,
 130    .parent        = TYPE_PCI_DEVICE,
 131    .instance_size = sizeof(PCIIPMIKCSDevice),
 132    .instance_init = pci_ipmi_kcs_instance_init,
 133    .class_init    = pci_ipmi_kcs_class_init,
 134    .interfaces = (InterfaceInfo[]) {
 135        { TYPE_IPMI_INTERFACE },
 136        { INTERFACE_CONVENTIONAL_PCI_DEVICE },
 137        { }
 138    }
 139};
 140
 141static void pci_ipmi_kcs_register_types(void)
 142{
 143    type_register_static(&pci_ipmi_kcs_info);
 144}
 145
 146type_init(pci_ipmi_kcs_register_types)
 147