Re: [PATCH v6 resend 4/4] vdpa: add vdpa-dev-pci support

["Michael S. Tsirkin" <mst@redhat.com>]

On Sat, May 14, 2022 at 12:11:07PM +0800, Longpeng(Mike) wrote:
> From: Longpeng <longpeng2@huawei.com>
> 
> Supports vdpa-dev-pci, we can use the device as follow:
> 
> -device vhost-vdpa-device-pci,vhostdev=/dev/vhost-vdpa-X
> 
> Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
> Signed-off-by: Longpeng <longpeng2@huawei.com>


Build fails:

FAILED: libqemu-aarch64-softmmu.fa.p/hw_virtio_vdpa-dev-pci.c.o 
cc -m64 -mcx16 -Ilibqemu-aarch64-softmmu.fa.p -I. -I.. -Itarget/arm -I../target/arm -Iqapi -Itrace -Iui -Iui/shader -I/usr/include/pixman-1 -I/usr/include/capstone -I/usr/include/spice-server -I/usr/include/spice-1 -I/usr/include/cacard -I/usr/include/glib-2.0 -I/usr/lib64/glib-2.0/include -I/usr/include/sysprof-4 -I/usr/include/nss3 -I/usr/include/nspr4 -I/usr/include/PCSC -fdiagnostics-color=auto -Wall -Winvalid-pch -Werror -std=gnu11 -O2 -g -isystem /scm/qemu/linux-headers -isystem linux-headers -iquote . -iquote /scm/qemu -iquote /scm/qemu/include -iquote /scm/qemu/disas/libvixl -iquote /scm/qemu/tcg/i386 -pthread -U_FORTIFY_SOURCE -D_FORTIFY_SOURCE=2 -D_GNU_SOURCE -D_FILE_OFFSET_BITS=64 -D_LARGEFILE_SOURCE -Wstrict-prototypes -Wredundant-decls -Wundef -Wwrite-strings -Wmissing-prototypes -fno-strict-aliasing -fno-common -fwrapv -Wold-style-declaration -Wold-style-definition -Wtype-limits -Wformat-security -Wformat-y2k -Winit-self -Wignored-qualifiers -Wempty-body -Wnested-externs -Wendif-labels -Wexpansion-to-defined -Wimplicit-fallthrough=2 -Wno-missing-include-dirs -Wno-shift-negative-value -Wno-psabi -fstack-protector-strong -fPIE -isystem../linux-headers -isystemlinux-headers -DNEED_CPU_H '-DCONFIG_TARGET="aarch64-softmmu-config-target.h"' '-DCONFIG_DEVICES="aarch64-softmmu-config-devices.h"' -MD -MQ libqemu-aarch64-softmmu.fa.p/hw_virtio_vdpa-dev-pci.c.o -MF libqemu-aarch64-softmmu.fa.p/hw_virtio_vdpa-dev-pci.c.o.d -o libqemu-aarch64-softmmu.fa.p/hw_virtio_vdpa-dev-pci.c.o -c ../hw/virtio/vdpa-dev-pci.c
../hw/virtio/vdpa-dev-pci.c:26:10: fatal error: virtio-pci.h: No such file or directory
   26 | #include "virtio-pci.h"
      |          ^~~~~~~~~~~~~~
compilation terminated.


> ---
>  hw/virtio/meson.build    |   1 +
>  hw/virtio/vdpa-dev-pci.c | 102 +++++++++++++++++++++++++++++++++++++++
>  2 files changed, 103 insertions(+)
>  create mode 100644 hw/virtio/vdpa-dev-pci.c
> 
> diff --git a/hw/virtio/meson.build b/hw/virtio/meson.build
> index 8f6f86db71..c2da69616f 100644
> --- a/hw/virtio/meson.build
> +++ b/hw/virtio/meson.build
> @@ -50,6 +50,7 @@ virtio_pci_ss.add(when: 'CONFIG_VIRTIO_SERIAL', if_true: files('virtio-serial-pc
>  virtio_pci_ss.add(when: 'CONFIG_VIRTIO_PMEM', if_true: files('virtio-pmem-pci.c'))
>  virtio_pci_ss.add(when: 'CONFIG_VIRTIO_IOMMU', if_true: files('virtio-iommu-pci.c'))
>  virtio_pci_ss.add(when: 'CONFIG_VIRTIO_MEM', if_true: files('virtio-mem-pci.c'))
> +virtio_pci_ss.add(when: 'CONFIG_VHOST_VDPA_DEV', if_true: files('vdpa-dev-pci.c'))
>  
>  virtio_ss.add_all(when: 'CONFIG_VIRTIO_PCI', if_true: virtio_pci_ss)
>  
> diff --git a/hw/virtio/vdpa-dev-pci.c b/hw/virtio/vdpa-dev-pci.c
> new file mode 100644
> index 0000000000..fde35dfc92
> --- /dev/null
> +++ b/hw/virtio/vdpa-dev-pci.c
> @@ -0,0 +1,102 @@
> +/*
> + * Vhost Vdpa Device PCI Bindings
> + *
> + * Copyright (c) Huawei Technologies Co., Ltd. 2022. All Rights Reserved.
> + *
> + * Authors:
> + *   Longpeng <longpeng2@huawei.com>
> + *
> + * Largely based on the "vhost-user-blk-pci.c" and "vhost-user-blk.c"
> + * implemented by:
> + *   Changpeng Liu <changpeng.liu@intel.com>
> + *
> + * This work is licensed under the terms of the GNU LGPL, version 2 or later.
> + * See the COPYING.LIB file in the top-level directory.
> + */
> +#include "qemu/osdep.h"
> +#include <sys/ioctl.h>
> +#include <linux/vhost.h>
> +#include "hw/virtio/virtio.h"
> +#include "hw/virtio/vdpa-dev.h"
> +#include "hw/pci/pci.h"
> +#include "hw/qdev-properties.h"
> +#include "qapi/error.h"
> +#include "qemu/error-report.h"
> +#include "qemu/module.h"
> +#include "virtio-pci.h"
> +#include "qom/object.h"
> +
> +
> +typedef struct VhostVdpaDevicePCI VhostVdpaDevicePCI;
> +
> +#define TYPE_VHOST_VDPA_DEVICE_PCI "vhost-vdpa-device-pci-base"
> +DECLARE_INSTANCE_CHECKER(VhostVdpaDevicePCI, VHOST_VDPA_DEVICE_PCI,
> +                         TYPE_VHOST_VDPA_DEVICE_PCI)
> +
> +struct VhostVdpaDevicePCI {
> +    VirtIOPCIProxy parent_obj;
> +    VhostVdpaDevice vdev;
> +};
> +
> +static void vhost_vdpa_device_pci_instance_init(Object *obj)
> +{
> +    VhostVdpaDevicePCI *dev = VHOST_VDPA_DEVICE_PCI(obj);
> +
> +    virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
> +                                TYPE_VHOST_VDPA_DEVICE);
> +    object_property_add_alias(obj, "bootindex", OBJECT(&dev->vdev),
> +                              "bootindex");
> +}
> +
> +static Property vhost_vdpa_device_pci_properties[] = {
> +    DEFINE_PROP_END_OF_LIST(),
> +};
> +
> +static int vhost_vdpa_device_pci_post_init(VhostVdpaDevice *v, Error **errp)
> +{
> +    VhostVdpaDevicePCI *dev = container_of(v, VhostVdpaDevicePCI, vdev);
> +    VirtIOPCIProxy *vpci_dev = &dev->parent_obj;
> +
> +    vpci_dev->class_code = virtio_pci_get_class_id(v->vdev_id);
> +    vpci_dev->trans_devid = virtio_pci_get_trans_devid(v->vdev_id);
> +    /* one for config vector */
> +    vpci_dev->nvectors = v->num_queues + 1;
> +
> +    return 0;
> +}
> +
> +static void
> +vhost_vdpa_device_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
> +{
> +    VhostVdpaDevicePCI *dev = VHOST_VDPA_DEVICE_PCI(vpci_dev);
> +
> +    dev->vdev.post_init = vhost_vdpa_device_pci_post_init;
> +    qdev_realize(DEVICE(&dev->vdev), BUS(&vpci_dev->bus), errp);
> +}
> +
> +static void vhost_vdpa_device_pci_class_init(ObjectClass *klass, void *data)
> +{
> +    DeviceClass *dc = DEVICE_CLASS(klass);
> +    VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
> +
> +    set_bit(DEVICE_CATEGORY_MISC, dc->categories);
> +    device_class_set_props(dc, vhost_vdpa_device_pci_properties);
> +    k->realize = vhost_vdpa_device_pci_realize;
> +}
> +
> +static const VirtioPCIDeviceTypeInfo vhost_vdpa_device_pci_info = {
> +    .base_name               = TYPE_VHOST_VDPA_DEVICE_PCI,
> +    .generic_name            = "vhost-vdpa-device-pci",
> +    .transitional_name       = "vhost-vdpa-device-pci-transitional",
> +    .non_transitional_name   = "vhost-vdpa-device-pci-non-transitional",
> +    .instance_size  = sizeof(VhostVdpaDevicePCI),
> +    .instance_init  = vhost_vdpa_device_pci_instance_init,
> +    .class_init     = vhost_vdpa_device_pci_class_init,
> +};
> +
> +static void vhost_vdpa_device_pci_register(void)
> +{
> +    virtio_pci_types_register(&vhost_vdpa_device_pci_info);
> +}
> +
> +type_init(vhost_vdpa_device_pci_register);
> -- 
> 2.23.0