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/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 106