| 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.rst |
| 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/acpi/aml-build.h" |
| 32 | #include "hw/core/hotplug.h" |
| 33 | |
| 34 | #define ACPI_PCIHP_IO_BASE_PROP "acpi-pcihp-io-base" |
| 35 | #define ACPI_PCIHP_IO_LEN_PROP "acpi-pcihp-io-len" |
| 36 | |
| 37 | /* PCI Hot-plug registers bases. See docs/specs/acpi_pci_hotplug.rst */ |
| 38 | #define ACPI_PCIHP_SEJ_BASE 0x8 |
| 39 | #define ACPI_PCIHP_BNMR_BASE 0x10 |
| 40 | |
| 41 | #define ACPI_PCIHP_SIZE 0x0018 |
| 42 | |
| 43 | typedef struct AcpiPciHpPciStatus { |
| 44 | uint32_t up; |
| 45 | uint32_t down; |
| 46 | uint32_t hotplug_enable; |
| 47 | } AcpiPciHpPciStatus; |
| 48 | |
| 49 | #define ACPI_PCIHP_PROP_BSEL "acpi-pcihp-bsel" |
| 50 | #define ACPI_PCIHP_MAX_HOTPLUG_BUS 256 |
| 51 | #define ACPI_PCIHP_BSEL_DEFAULT 0x0 |
| 52 | |
| 53 | typedef struct AcpiPciHpState { |
| 54 | AcpiPciHpPciStatus acpi_pcihp_pci_status[ACPI_PCIHP_MAX_HOTPLUG_BUS]; |
| 55 | uint32_t hotplug_select; |
| 56 | uint32_t acpi_index; |
| 57 | PCIBus *root; |
| 58 | MemoryRegion io; |
| 59 | uint16_t io_base; |
| 60 | uint16_t io_len; |
| 61 | bool use_acpi_hotplug_bridge; |
| 62 | bool use_acpi_root_pci_hotplug; |
| 63 | } AcpiPciHpState; |
| 64 | |
| 65 | void acpi_pcihp_init(Object *owner, AcpiPciHpState *, |
| 66 | MemoryRegion *io, uint16_t io_base); |
| 67 | |
| 68 | bool acpi_pcihp_is_hotpluggable_bus(AcpiPciHpState *s, BusState *bus); |
| 69 | void acpi_pcihp_device_pre_plug_cb(HotplugHandler *hotplug_dev, |
| 70 | DeviceState *dev, Error **errp); |
| 71 | void acpi_pcihp_device_plug_cb(HotplugHandler *hotplug_dev, AcpiPciHpState *s, |
| 72 | DeviceState *dev, Error **errp); |
| 73 | void acpi_pcihp_device_unplug_cb(HotplugHandler *hotplug_dev, AcpiPciHpState *s, |
| 74 | DeviceState *dev, Error **errp); |
| 75 | void acpi_pcihp_device_unplug_request_cb(HotplugHandler *hotplug_dev, |
| 76 | AcpiPciHpState *s, DeviceState *dev, |
| 77 | Error **errp); |
| 78 | |
| 79 | void build_acpi_pci_hotplug(Aml *table, AmlRegionSpace rs, uint64_t pcihp_addr); |
| 80 | void build_append_pci_dsm_func0_common(Aml *ctx, Aml *retvar); |
| 81 | void build_append_pcihp_resources(Aml *table, |
| 82 | uint64_t io_addr, uint64_t io_len); |
| 83 | bool build_append_notification_callback(Aml *parent_scope, const PCIBus *bus); |
| 84 | |
| 85 | void build_append_pci_bus_devices(Aml *parent_scope, PCIBus *bus); |
| 86 | |
| 87 | /* Called on reset */ |
| 88 | void acpi_pcihp_reset(AcpiPciHpState *s); |
| 89 | |
| 90 | void build_append_pcihp_slots(Aml *parent_scope, PCIBus *bus); |
| 91 | |
| 92 | extern const VMStateDescription vmstate_acpi_pcihp_pci_status; |
| 93 | |
| 94 | #define VMSTATE_PCI_HOTPLUG(pcihp, state, test_pcihp, test_acpi_index) \ |
| 95 | VMSTATE_UINT32_TEST(pcihp.hotplug_select, state, \ |
| 96 | test_pcihp), \ |
| 97 | VMSTATE_STRUCT_ARRAY_TEST(pcihp.acpi_pcihp_pci_status, state, \ |
| 98 | ACPI_PCIHP_MAX_HOTPLUG_BUS, \ |
| 99 | test_pcihp, 1, \ |
| 100 | vmstate_acpi_pcihp_pci_status, \ |
| 101 | AcpiPciHpPciStatus), \ |
| 102 | VMSTATE_UINT32_TEST(pcihp.acpi_index, state, \ |
| 103 | test_acpi_index) |
| 104 | |
| 105 | #endif |