/* * Virtio PCI Bindings * * Copyright IBM, Corp. 2007 * Copyright (c) 2009 CodeSourcery * * Authors: * Anthony Liguori * Paul Brook * * This work is licensed under the terms of the GNU GPL, version 2. See * the COPYING file in the top-level directory. */ #ifndef QEMU_VIRTIO_PCI_H #define QEMU_VIRTIO_PCI_H #include "hw/pci/msi.h" #include "hw/virtio/virtio-bus.h" typedef struct VirtIOPCIProxy VirtIOPCIProxy; /* virtio-pci-bus */ typedef struct VirtioBusState VirtioPCIBusState; typedef struct VirtioBusClass VirtioPCIBusClass; #define TYPE_VIRTIO_PCI_BUS "virtio-pci-bus" #define VIRTIO_PCI_BUS(obj) \ OBJECT_CHECK(VirtioPCIBusState, (obj), TYPE_VIRTIO_PCI_BUS) #define VIRTIO_PCI_BUS_GET_CLASS(obj) \ OBJECT_GET_CLASS(VirtioPCIBusClass, obj, TYPE_VIRTIO_PCI_BUS) #define VIRTIO_PCI_BUS_CLASS(klass) \ OBJECT_CLASS_CHECK(VirtioPCIBusClass, klass, TYPE_VIRTIO_PCI_BUS) enum { VIRTIO_PCI_FLAG_BUS_MASTER_BUG_MIGRATION_BIT, VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, VIRTIO_PCI_FLAG_MIGRATE_EXTRA_BIT, VIRTIO_PCI_FLAG_MODERN_PIO_NOTIFY_BIT, VIRTIO_PCI_FLAG_DISABLE_PCIE_BIT, VIRTIO_PCI_FLAG_PAGE_PER_VQ_BIT, VIRTIO_PCI_FLAG_ATS_BIT, VIRTIO_PCI_FLAG_INIT_DEVERR_BIT, VIRTIO_PCI_FLAG_INIT_LNKCTL_BIT, VIRTIO_PCI_FLAG_INIT_PM_BIT, }; /* Need to activate work-arounds for buggy guests at vmstate load. */ #define VIRTIO_PCI_FLAG_BUS_MASTER_BUG_MIGRATION \ (1 << VIRTIO_PCI_FLAG_BUS_MASTER_BUG_MIGRATION_BIT) /* Performance improves when virtqueue kick processing is decoupled from the * vcpu thread using ioeventfd for some devices. */ #define VIRTIO_PCI_FLAG_USE_IOEVENTFD (1 << VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT) /* virtio version flags */ #define VIRTIO_PCI_FLAG_DISABLE_PCIE (1 << VIRTIO_PCI_FLAG_DISABLE_PCIE_BIT) /* migrate extra state */ #define VIRTIO_PCI_FLAG_MIGRATE_EXTRA (1 << VIRTIO_PCI_FLAG_MIGRATE_EXTRA_BIT) /* have pio notification for modern device ? */ #define VIRTIO_PCI_FLAG_MODERN_PIO_NOTIFY \ (1 << VIRTIO_PCI_FLAG_MODERN_PIO_NOTIFY_BIT) /* page per vq flag to be used by split drivers within guests */ #define VIRTIO_PCI_FLAG_PAGE_PER_VQ \ (1 << VIRTIO_PCI_FLAG_PAGE_PER_VQ_BIT) /* address space translation service */ #define VIRTIO_PCI_FLAG_ATS (1 << VIRTIO_PCI_FLAG_ATS_BIT) /* Init error enabling flags */ #define VIRTIO_PCI_FLAG_INIT_DEVERR (1 << VIRTIO_PCI_FLAG_INIT_DEVERR_BIT) /* Init Link Control register */ #define VIRTIO_PCI_FLAG_INIT_LNKCTL (1 << VIRTIO_PCI_FLAG_INIT_LNKCTL_BIT) /* Init Power Management */ #define VIRTIO_PCI_FLAG_INIT_PM (1 << VIRTIO_PCI_FLAG_INIT_PM_BIT) typedef struct { MSIMessage msg; int virq; unsigned int users; } VirtIOIRQFD; /* * virtio-pci: This is the PCIDevice which has a virtio-pci-bus. */ #define TYPE_VIRTIO_PCI "virtio-pci" #define VIRTIO_PCI_GET_CLASS(obj) \ OBJECT_GET_CLASS(VirtioPCIClass, obj, TYPE_VIRTIO_PCI) #define VIRTIO_PCI_CLASS(klass) \ OBJECT_CLASS_CHECK(VirtioPCIClass, klass, TYPE_VIRTIO_PCI) #define VIRTIO_PCI(obj) \ OBJECT_CHECK(VirtIOPCIProxy, (obj), TYPE_VIRTIO_PCI) typedef struct VirtioPCIClass { PCIDeviceClass parent_class; DeviceRealize parent_dc_realize; void (*realize)(VirtIOPCIProxy *vpci_dev, Error **errp); } VirtioPCIClass; typedef struct VirtIOPCIRegion { MemoryRegion mr; uint32_t offset; uint32_t size; uint32_t type; } VirtIOPCIRegion; typedef struct VirtIOPCIQueue { uint16_t num; bool enabled; uint32_t desc[2]; uint32_t avail[2]; uint32_t used[2]; } VirtIOPCIQueue; struct VirtIOPCIProxy { PCIDevice pci_dev; MemoryRegion bar; union { struct { VirtIOPCIRegion common; VirtIOPCIRegion isr; VirtIOPCIRegion device; VirtIOPCIRegion notify; VirtIOPCIRegion notify_pio; }; VirtIOPCIRegion regs[5]; }; MemoryRegion modern_bar; MemoryRegion io_bar; uint32_t legacy_io_bar_idx; uint32_t msix_bar_idx; uint32_t modern_io_bar_idx; uint32_t modern_mem_bar_idx; int config_cap; uint32_t flags; bool disable_modern; bool ignore_backend_features; OnOffAuto disable_legacy; uint32_t class_code; uint32_t nvectors; uint32_t dfselect; uint32_t gfselect; uint32_t guest_features[2]; VirtIOPCIQueue vqs[VIRTIO_QUEUE_MAX]; VirtIOIRQFD *vector_irqfd; int nvqs_with_notifiers; VirtioBusState bus; }; static inline bool virtio_pci_modern(VirtIOPCIProxy *proxy) { return !proxy->disable_modern; } static inline bool virtio_pci_legacy(VirtIOPCIProxy *proxy) { return proxy->disable_legacy == ON_OFF_AUTO_OFF; } static inline void virtio_pci_force_virtio_1(VirtIOPCIProxy *proxy) { proxy->disable_modern = false; proxy->disable_legacy = ON_OFF_AUTO_ON; } static inline void virtio_pci_disable_modern(VirtIOPCIProxy *proxy) { proxy->disable_modern = true; } /* * virtio-input-pci: This extends VirtioPCIProxy. */ #define TYPE_VIRTIO_INPUT_PCI "virtio-input-pci" /* Virtio ABI version, if we increment this, we break the guest driver. */ #define VIRTIO_PCI_ABI_VERSION 0 /* Input for virtio_pci_types_register() */ typedef struct VirtioPCIDeviceTypeInfo { /* * Common base class for the subclasses below. * * Required only if transitional_name or non_transitional_name is set. * * We need a separate base type instead of making all types * inherit from generic_name for two reasons: * 1) generic_name implements INTERFACE_PCIE_DEVICE, but * transitional_name does not. * 2) generic_name has the "disable-legacy" and "disable-modern" * properties, transitional_name and non_transitional name don't. */ const char *base_name; /* * Generic device type. Optional. * * Supports both transitional and non-transitional modes, * using the disable-legacy and disable-modern properties. * If disable-legacy=auto, (non-)transitional mode is selected * depending on the bus where the device is plugged. * * Implements both INTERFACE_PCIE_DEVICE and INTERFACE_CONVENTIONAL_PCI_DEVICE, * but PCI Express is supported only in non-transitional mode. * * The only type implemented by QEMU 3.1 and older. */ const char *generic_name; /* * The transitional device type. Optional. * * Implements both INTERFACE_PCIE_DEVICE and INTERFACE_CONVENTIONAL_PCI_DEVICE. */ const char *transitional_name; /* * The non-transitional device type. Optional. * * Implements INTERFACE_CONVENTIONAL_PCI_DEVICE only. */ const char *non_transitional_name; /* Parent type. If NULL, TYPE_VIRTIO_PCI is used */ const char *parent; /* Same as TypeInfo fields: */ size_t instance_size; size_t class_size; void (*instance_init)(Object *obj); void (*class_init)(ObjectClass *klass, void *data); InterfaceInfo *interfaces; } VirtioPCIDeviceTypeInfo; /* Register virtio-pci type(s). @t must be static. */ void virtio_pci_types_register(const VirtioPCIDeviceTypeInfo *t); #endif