include/hw/acpi/pcihp.h

   1 /*
   2  * QEMU<->ACPI BIOS PCI hotplug interface
   3  *
   4  * QEMU supports PCI hotplug via ACPI. This module
   5  * implements the interface between QEMU and the ACPI BIOS.
   6  * Interface specification - see docs/specs/acpi_pci_hotplug.txt
   7  *
   8  * Copyright (c) 2013, Red Hat Inc, Michael S. Tsirkin (mst@redhat.com)
   9  * Copyright (c) 2006 Fabrice Bellard
  10  *
  11  * This library is free software; you can redistribute it and/or
  12  * modify it under the terms of the GNU Lesser General Public
  13  * License version 2.1 as published by the Free Software Foundation.
  14  *
  15  * This library is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  18  * Lesser General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU Lesser General Public
  21  * License along with this library; if not, see <http://www.gnu.org/licenses/>
  22  *
  23  * Contributions after 2012-01-13 are licensed under the terms of the
  24  * GNU GPL, version 2 or (at your option) any later version.
  25  */
  26
  27 #ifndef HW_ACPI_PCIHP_H
  28 #define HW_ACPI_PCIHP_H
  29
  30 #include "hw/acpi/acpi.h"
  31 #include "hw/hotplug.h"
  32
  33 #define ACPI_PCIHP_IO_BASE_PROP "acpi-pcihp-io-base"
  34 #define ACPI_PCIHP_IO_LEN_PROP "acpi-pcihp-io-len"
  35
  36 typedef struct AcpiPciHpPciStatus {
  37     uint32_t up;
  38     uint32_t down;
  39     uint32_t hotplug_enable;
  40 } AcpiPciHpPciStatus;
  41
  42 #define ACPI_PCIHP_PROP_BSEL "acpi-pcihp-bsel"
  43 #define ACPI_PCIHP_MAX_HOTPLUG_BUS 256
  44 #define ACPI_PCIHP_BSEL_DEFAULT 0x0
  45
  46 typedef struct AcpiPciHpState {
  47     AcpiPciHpPciStatus acpi_pcihp_pci_status[ACPI_PCIHP_MAX_HOTPLUG_BUS];
  48     uint32_t hotplug_select;
  49     uint32_t acpi_index;
  50     PCIBus *root;
  51     MemoryRegion io;
  52     uint16_t io_base;
  53     uint16_t io_len;
  54     bool use_acpi_hotplug_bridge;
  55     bool use_acpi_root_pci_hotplug;
  56 } AcpiPciHpState;
  57
  58 void acpi_pcihp_init(Object *owner, AcpiPciHpState *, PCIBus *root,
  59                      MemoryRegion *io, uint16_t io_base);
  60
  61 bool acpi_pcihp_is_hotpluggbale_bus(AcpiPciHpState *s, BusState *bus);
  62 void acpi_pcihp_device_pre_plug_cb(HotplugHandler *hotplug_dev,
  63                                    DeviceState *dev, Error **errp);
  64 void acpi_pcihp_device_plug_cb(HotplugHandler *hotplug_dev, AcpiPciHpState *s,
  65                                DeviceState *dev, Error **errp);
  66 void acpi_pcihp_device_unplug_cb(HotplugHandler *hotplug_dev, AcpiPciHpState *s,
  67                                  DeviceState *dev, Error **errp);
  68 void acpi_pcihp_device_unplug_request_cb(HotplugHandler *hotplug_dev,
  69                                          AcpiPciHpState *s, DeviceState *dev,
  70                                          Error **errp);
  71
  72 /* Called on reset */
  73 void acpi_pcihp_reset(AcpiPciHpState *s);
  74
  75 void build_append_pcihp_slots(Aml *parent_scope, PCIBus *bus);
  76
  77 extern const VMStateDescription vmstate_acpi_pcihp_pci_status;
  78
  79 #define VMSTATE_PCI_HOTPLUG(pcihp, state, test_pcihp, test_acpi_index) \
  80         VMSTATE_UINT32_TEST(pcihp.hotplug_select, state, \
  81                             test_pcihp), \
  82         VMSTATE_STRUCT_ARRAY_TEST(pcihp.acpi_pcihp_pci_status, state, \
  83                                   ACPI_PCIHP_MAX_HOTPLUG_BUS, \
  84                                   test_pcihp, 1, \
  85                                   vmstate_acpi_pcihp_pci_status, \
  86                                   AcpiPciHpPciStatus), \
  87         VMSTATE_UINT32_TEST(pcihp.acpi_index, state, \
  88                             test_acpi_index)
  89
  90 #endif