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qemu-patch-raspberry4/hw/virtio/virtio-pci.h
Eduardo Habkost f6e501a28e virtio: Provide version-specific variants of virtio PCI devices 
Many of the current virtio-*-pci device types actually represent
3 different types of devices:
* virtio 1.0 non-transitional devices
* virtio 1.0 transitional devices
* virtio 0.9 ("legacy device" in virtio 1.0 terminology)

That would be just an annoyance if it didn't break our device/bus
compatibility QMP interfaces.  With these multi-purpose device
types, there's no way to tell management software that
transitional devices and legacy devices require a Conventional
PCI bus.

The multi-purpose device types would also prevent us from telling
management software what's the PCI vendor/device ID for them,
because their PCI IDs change at runtime depending on the bus
where they were plugged.

This patch adds separate device types for each of those virtio
device flavors:

- virtio-*-pci: the existing multi-purpose device types
  - Configurable using `disable-legacy` and `disable-modern`
    properties
  - Legacy driver support is automatically enabled/disabled
    depending on the bus where it is plugged
  - Supports Conventional PCI and PCI Express buses
    (but Conventional PCI is incompatible with
    disable-legacy=off)
  - Changes PCI vendor/device IDs at runtime
- virtio-*-pci-transitional: virtio-1.0 device supporting legacy drivers
  - Supports Conventional PCI buses only, because
    it has a PIO BAR
- virtio-*-pci-non-transitional: modern-only
  - Supports both Conventional PCI and PCI Express buses

The existing TYPE_* macros for these types will point to an
abstract base type, so existing casts in the code will keep
working for all variants.

A simple test script (tests/acceptance/virtio_version.py) is
included, to check if the new device types are equivalent to
using the `disable-legacy` and `disable-modern` options.

Acked-by: Andrea Bolognani <abologna@redhat.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2018-12-19 16:48:16 -05:00

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/*
* Virtio PCI Bindings
*
* Copyright IBM, Corp. 2007
* Copyright (c) 2009 CodeSourcery
*
* Authors:
* Anthony Liguori <aliguori@us.ibm.com>
* Paul Brook <paul@codesourcery.com>
*
* 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-blk.h"
#include "hw/virtio/virtio-net.h"
#include "hw/virtio/virtio-rng.h"
#include "hw/virtio/virtio-serial.h"
#include "hw/virtio/virtio-scsi.h"
#include "hw/virtio/virtio-balloon.h"
#include "hw/virtio/virtio-bus.h"
#include "hw/virtio/virtio-input.h"
#include "hw/virtio/virtio-gpu.h"
#include "hw/virtio/virtio-crypto.h"
#include "hw/virtio/vhost-user-scsi.h"
#if defined(CONFIG_VHOST_USER) && defined(CONFIG_LINUX)
#include "hw/virtio/vhost-user-blk.h"
#endif
#ifdef CONFIG_VIRTFS
#include "hw/9pfs/virtio-9p.h"
#endif
#ifdef CONFIG_VHOST_SCSI
#include "hw/virtio/vhost-scsi.h"
#endif
#ifdef CONFIG_VHOST_VSOCK
#include "hw/virtio/vhost-vsock.h"
#endif
typedef struct VirtIOPCIProxy VirtIOPCIProxy;
typedef struct VirtIOBlkPCI VirtIOBlkPCI;
typedef struct VirtIOSCSIPCI VirtIOSCSIPCI;
typedef struct VirtIOBalloonPCI VirtIOBalloonPCI;
typedef struct VirtIOSerialPCI VirtIOSerialPCI;
typedef struct VirtIONetPCI VirtIONetPCI;
typedef struct VHostSCSIPCI VHostSCSIPCI;
typedef struct VHostUserSCSIPCI VHostUserSCSIPCI;
typedef struct VHostUserBlkPCI VHostUserBlkPCI;
typedef struct VirtIORngPCI VirtIORngPCI;
typedef struct VirtIOInputPCI VirtIOInputPCI;
typedef struct VirtIOInputHIDPCI VirtIOInputHIDPCI;
typedef struct VirtIOInputHostPCI VirtIOInputHostPCI;
typedef struct VirtIOGPUPCI VirtIOGPUPCI;
typedef struct VHostVSockPCI VHostVSockPCI;
typedef struct VirtIOCryptoPCI VirtIOCryptoPCI;
/* 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-scsi-pci: This extends VirtioPCIProxy.
*/
#define TYPE_VIRTIO_SCSI_PCI "virtio-scsi-pci-base"
#define VIRTIO_SCSI_PCI(obj) \
OBJECT_CHECK(VirtIOSCSIPCI, (obj), TYPE_VIRTIO_SCSI_PCI)
struct VirtIOSCSIPCI {
VirtIOPCIProxy parent_obj;
VirtIOSCSI vdev;
};
#ifdef CONFIG_VHOST_SCSI
/*
* vhost-scsi-pci: This extends VirtioPCIProxy.
*/
#define TYPE_VHOST_SCSI_PCI "vhost-scsi-pci-base"
#define VHOST_SCSI_PCI(obj) \
OBJECT_CHECK(VHostSCSIPCI, (obj), TYPE_VHOST_SCSI_PCI)
struct VHostSCSIPCI {
VirtIOPCIProxy parent_obj;
VHostSCSI vdev;
};
#endif
#define TYPE_VHOST_USER_SCSI_PCI "vhost-user-scsi-pci-base"
#define VHOST_USER_SCSI_PCI(obj) \
OBJECT_CHECK(VHostUserSCSIPCI, (obj), TYPE_VHOST_USER_SCSI_PCI)
struct VHostUserSCSIPCI {
VirtIOPCIProxy parent_obj;
VHostUserSCSI vdev;
};
#if defined(CONFIG_VHOST_USER) && defined(CONFIG_LINUX)
/*
* vhost-user-blk-pci: This extends VirtioPCIProxy.
*/
#define TYPE_VHOST_USER_BLK_PCI "vhost-user-blk-pci-base"
#define VHOST_USER_BLK_PCI(obj) \
OBJECT_CHECK(VHostUserBlkPCI, (obj), TYPE_VHOST_USER_BLK_PCI)
struct VHostUserBlkPCI {
VirtIOPCIProxy parent_obj;
VHostUserBlk vdev;
};
#endif
/*
* virtio-blk-pci: This extends VirtioPCIProxy.
*/
#define TYPE_VIRTIO_BLK_PCI "virtio-blk-pci-base"
#define VIRTIO_BLK_PCI(obj) \
OBJECT_CHECK(VirtIOBlkPCI, (obj), TYPE_VIRTIO_BLK_PCI)
struct VirtIOBlkPCI {
VirtIOPCIProxy parent_obj;
VirtIOBlock vdev;
};
/*
* virtio-balloon-pci: This extends VirtioPCIProxy.
*/
#define TYPE_VIRTIO_BALLOON_PCI "virtio-balloon-pci-base"
#define VIRTIO_BALLOON_PCI(obj) \
OBJECT_CHECK(VirtIOBalloonPCI, (obj), TYPE_VIRTIO_BALLOON_PCI)
struct VirtIOBalloonPCI {
VirtIOPCIProxy parent_obj;
VirtIOBalloon vdev;
};
/*
* virtio-serial-pci: This extends VirtioPCIProxy.
*/
#define TYPE_VIRTIO_SERIAL_PCI "virtio-serial-pci-base"
#define VIRTIO_SERIAL_PCI(obj) \
OBJECT_CHECK(VirtIOSerialPCI, (obj), TYPE_VIRTIO_SERIAL_PCI)
struct VirtIOSerialPCI {
VirtIOPCIProxy parent_obj;
VirtIOSerial vdev;
};
/*
* virtio-net-pci: This extends VirtioPCIProxy.
*/
#define TYPE_VIRTIO_NET_PCI "virtio-net-pci-base"
#define VIRTIO_NET_PCI(obj) \
OBJECT_CHECK(VirtIONetPCI, (obj), TYPE_VIRTIO_NET_PCI)
struct VirtIONetPCI {
VirtIOPCIProxy parent_obj;
VirtIONet vdev;
};
/*
* virtio-9p-pci: This extends VirtioPCIProxy.
*/
#ifdef CONFIG_VIRTFS
#define TYPE_VIRTIO_9P_PCI "virtio-9p-pci-base"
#define VIRTIO_9P_PCI(obj) \
OBJECT_CHECK(V9fsPCIState, (obj), TYPE_VIRTIO_9P_PCI)
typedef struct V9fsPCIState {
VirtIOPCIProxy parent_obj;
V9fsVirtioState vdev;
} V9fsPCIState;
#endif
/*
* virtio-rng-pci: This extends VirtioPCIProxy.
*/
#define TYPE_VIRTIO_RNG_PCI "virtio-rng-pci-base"
#define VIRTIO_RNG_PCI(obj) \
OBJECT_CHECK(VirtIORngPCI, (obj), TYPE_VIRTIO_RNG_PCI)
struct VirtIORngPCI {
VirtIOPCIProxy parent_obj;
VirtIORNG vdev;
};
/*
* virtio-input-pci: This extends VirtioPCIProxy.
*/
#define TYPE_VIRTIO_INPUT_PCI "virtio-input-pci"
#define VIRTIO_INPUT_PCI(obj) \
OBJECT_CHECK(VirtIOInputPCI, (obj), TYPE_VIRTIO_INPUT_PCI)
struct VirtIOInputPCI {
VirtIOPCIProxy parent_obj;
VirtIOInput vdev;
};
#define TYPE_VIRTIO_INPUT_HID_PCI "virtio-input-hid-pci"
#define TYPE_VIRTIO_KEYBOARD_PCI "virtio-keyboard-pci"
#define TYPE_VIRTIO_MOUSE_PCI "virtio-mouse-pci"
#define TYPE_VIRTIO_TABLET_PCI "virtio-tablet-pci"
#define VIRTIO_INPUT_HID_PCI(obj) \
OBJECT_CHECK(VirtIOInputHIDPCI, (obj), TYPE_VIRTIO_INPUT_HID_PCI)
struct VirtIOInputHIDPCI {
VirtIOPCIProxy parent_obj;
VirtIOInputHID vdev;
};
#ifdef CONFIG_LINUX
#define TYPE_VIRTIO_INPUT_HOST_PCI "virtio-input-host-pci-base"
#define VIRTIO_INPUT_HOST_PCI(obj) \
OBJECT_CHECK(VirtIOInputHostPCI, (obj), TYPE_VIRTIO_INPUT_HOST_PCI)
struct VirtIOInputHostPCI {
VirtIOPCIProxy parent_obj;
VirtIOInputHost vdev;
};
#endif
/*
* virtio-gpu-pci: This extends VirtioPCIProxy.
*/
#define TYPE_VIRTIO_GPU_PCI "virtio-gpu-pci"
#define VIRTIO_GPU_PCI(obj) \
OBJECT_CHECK(VirtIOGPUPCI, (obj), TYPE_VIRTIO_GPU_PCI)
struct VirtIOGPUPCI {
VirtIOPCIProxy parent_obj;
VirtIOGPU vdev;
};
#ifdef CONFIG_VHOST_VSOCK
/*
* vhost-vsock-pci: This extends VirtioPCIProxy.
*/
#define TYPE_VHOST_VSOCK_PCI "vhost-vsock-pci-base"
#define VHOST_VSOCK_PCI(obj) \
OBJECT_CHECK(VHostVSockPCI, (obj), TYPE_VHOST_VSOCK_PCI)
struct VHostVSockPCI {
VirtIOPCIProxy parent_obj;
VHostVSock vdev;
};
#endif
/*
* virtio-crypto-pci: This extends VirtioPCIProxy.
*/
#define TYPE_VIRTIO_CRYPTO_PCI "virtio-crypto-pci"
#define VIRTIO_CRYPTO_PCI(obj) \
OBJECT_CHECK(VirtIOCryptoPCI, (obj), TYPE_VIRTIO_CRYPTO_PCI)
struct VirtIOCryptoPCI {
VirtIOPCIProxy parent_obj;
VirtIOCrypto vdev;
};
/* 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;
void (*instance_init)(Object *obj);
void (*class_init)(ObjectClass *klass, void *data);
} VirtioPCIDeviceTypeInfo;
/* Register virtio-pci type(s). @t must be static. */
void virtio_pci_types_register(const VirtioPCIDeviceTypeInfo *t);
#endif
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