hw/ipmi/pci_ipmi_bt.c

   1 /*
   2  * QEMU PCI IPMI BT 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_bt.h"
  28 #include "hw/pci/pci.h"
  29 #include "qom/object.h"
  30
  31 #define TYPE_PCI_IPMI_BT "pci-ipmi-bt"
  32 typedef struct PCIIPMIBTDevice PCIIPMIBTDevice;
  33 DECLARE_INSTANCE_CHECKER(PCIIPMIBTDevice, PCI_IPMI_BT,
  34                          TYPE_PCI_IPMI_BT)
  35
  36 struct PCIIPMIBTDevice {
  37     PCIDevice dev;
  38     IPMIBT bt;
  39     bool irq_enabled;
  40     uint32_t uuid;
  41 };
  42
  43 static void pci_ipmi_raise_irq(IPMIBT *ik)
  44 {
  45     PCIIPMIBTDevice *pik = ik->opaque;
  46
  47     pci_set_irq(&pik->dev, true);
  48 }
  49
  50 static void pci_ipmi_lower_irq(IPMIBT *ik)
  51 {
  52     PCIIPMIBTDevice *pik = ik->opaque;
  53
  54     pci_set_irq(&pik->dev, false);
  55 }
  56
  57 static void pci_ipmi_bt_realize(PCIDevice *pd, Error **errp)
  58 {
  59     Error *err = NULL;
  60     PCIIPMIBTDevice *pik = PCI_IPMI_BT(pd);
  61     IPMIInterface *ii = IPMI_INTERFACE(pd);
  62     IPMIInterfaceClass *iic = IPMI_INTERFACE_GET_CLASS(ii);
  63
  64     if (!pik->bt.bmc) {
  65         error_setg(errp, "IPMI device requires a bmc attribute to be set");
  66         return;
  67     }
  68
  69     pik->uuid = ipmi_next_uuid();
  70
  71     pik->bt.bmc->intf = ii;
  72     pik->bt.opaque = pik;
  73
  74     pci_config_set_prog_interface(pd->config, 0x02); /* BT */
  75     pci_config_set_interrupt_pin(pd->config, 0x01);
  76     pik->bt.use_irq = 1;
  77     pik->bt.raise_irq = pci_ipmi_raise_irq;
  78     pik->bt.lower_irq = pci_ipmi_lower_irq;
  79
  80     iic->init(ii, 8, &err);
  81     if (err) {
  82         error_propagate(errp, err);
  83         return;
  84     }
  85     pci_register_bar(pd, 0, PCI_BASE_ADDRESS_SPACE_IO, &pik->bt.io);
  86 }
  87
  88 const VMStateDescription vmstate_PCIIPMIBTDevice = {
  89     .name = TYPE_IPMI_INTERFACE_PREFIX "pci-bt",
  90     .version_id = 1,
  91     .minimum_version_id = 1,
  92     .fields      = (VMStateField[]) {
  93         VMSTATE_PCI_DEVICE(dev, PCIIPMIBTDevice),
  94         VMSTATE_STRUCT(bt, PCIIPMIBTDevice, 1, vmstate_IPMIBT, IPMIBT),
  95         VMSTATE_END_OF_LIST()
  96     }
  97 };
  98
  99 static void pci_ipmi_bt_instance_init(Object *obj)
 100 {
 101     PCIIPMIBTDevice *pik = PCI_IPMI_BT(obj);
 102
 103     ipmi_bmc_find_and_link(obj, (Object **) &pik->bt.bmc);
 104 }
 105
 106 static void *pci_ipmi_bt_get_backend_data(IPMIInterface *ii)
 107 {
 108     PCIIPMIBTDevice *pik = PCI_IPMI_BT(ii);
 109
 110     return &pik->bt;
 111 }
 112
 113 static void pci_ipmi_bt_class_init(ObjectClass *oc, void *data)
 114 {
 115     DeviceClass *dc = DEVICE_CLASS(oc);
 116     PCIDeviceClass *pdc = PCI_DEVICE_CLASS(oc);
 117     IPMIInterfaceClass *iic = IPMI_INTERFACE_CLASS(oc);
 118
 119     pdc->vendor_id = PCI_VENDOR_ID_QEMU;
 120     pdc->device_id = PCI_DEVICE_ID_QEMU_IPMI;
 121     pdc->revision = 1;
 122     pdc->class_id = PCI_CLASS_SERIAL_IPMI;
 123
 124     dc->vmsd = &vmstate_PCIIPMIBTDevice;
 125     dc->desc = "PCI IPMI BT";
 126     pdc->realize = pci_ipmi_bt_realize;
 127
 128     iic->get_backend_data = pci_ipmi_bt_get_backend_data;
 129     ipmi_bt_class_init(iic);
 130 }
 131
 132 static const TypeInfo pci_ipmi_bt_info = {
 133     .name          = TYPE_PCI_IPMI_BT,
 134     .parent        = TYPE_PCI_DEVICE,
 135     .instance_size = sizeof(PCIIPMIBTDevice),
 136     .instance_init = pci_ipmi_bt_instance_init,
 137     .class_init    = pci_ipmi_bt_class_init,
 138     .interfaces = (InterfaceInfo[]) {
 139         { TYPE_IPMI_INTERFACE },
 140         { INTERFACE_CONVENTIONAL_PCI_DEVICE },
 141         { }
 142     }
 143 };
 144
 145 static void pci_ipmi_bt_register_types(void)
 146 {
 147     type_register_static(&pci_ipmi_bt_info);
 148 }
 149
 150 type_init(pci_ipmi_bt_register_types)