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 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 <inttypes.h>
  31 #include <qemu/typedefs.h>
  32 #include "hw/acpi/acpi.h"
  33 #include "migration/vmstate.h"
  34
  35 #define ACPI_PCIHP_IO_BASE_PROP "acpi-pcihp-io-base"
  36 #define ACPI_PCIHP_IO_LEN_PROP "acpi-pcihp-io-len"
  37
  38 typedef struct AcpiPciHpPciStatus {
  39     uint32_t up;
  40     uint32_t down;
  41     uint32_t hotplug_enable;
  42 } AcpiPciHpPciStatus;
  43
  44 #define ACPI_PCIHP_PROP_BSEL "acpi-pcihp-bsel"
  45 #define ACPI_PCIHP_MAX_HOTPLUG_BUS 256
  46 #define ACPI_PCIHP_BSEL_DEFAULT 0x0
  47
  48 typedef struct AcpiPciHpState {
  49     AcpiPciHpPciStatus acpi_pcihp_pci_status[ACPI_PCIHP_MAX_HOTPLUG_BUS];
  50     uint32_t hotplug_select;
  51     PCIBus *root;
  52     MemoryRegion io;
  53     bool legacy_piix;
  54     uint16_t io_base;
  55     uint16_t io_len;
  56 } AcpiPciHpState;
  57
  58 void acpi_pcihp_init(Object *owner, AcpiPciHpState *, PCIBus *root,
  59                      MemoryRegion *address_space_io, bool bridges_enabled);
  60
  61 void acpi_pcihp_device_plug_cb(ACPIREGS *ar, qemu_irq irq, AcpiPciHpState *s,
  62                                DeviceState *dev, Error **errp);
  63 void acpi_pcihp_device_unplug_cb(ACPIREGS *ar, qemu_irq irq, AcpiPciHpState *s,
  64                                  DeviceState *dev, Error **errp);
  65
  66 /* Called on reset */
  67 void acpi_pcihp_reset(AcpiPciHpState *s);
  68
  69 extern const VMStateDescription vmstate_acpi_pcihp_pci_status;
  70
  71 #define VMSTATE_PCI_HOTPLUG(pcihp, state, test_pcihp) \
  72         VMSTATE_UINT32_TEST(pcihp.hotplug_select, state, \
  73                             test_pcihp), \
  74         VMSTATE_STRUCT_ARRAY_TEST(pcihp.acpi_pcihp_pci_status, state, \
  75                                   ACPI_PCIHP_MAX_HOTPLUG_BUS, \
  76                                   test_pcihp, 1, \
  77                                   vmstate_acpi_pcihp_pci_status, \
  78                                   AcpiPciHpPciStatus)
  79
  80 #endif