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