vhost-user-rng-pci: Add vhost-user-rng-pci implementation

This patch provides a PCI bus interface to the vhost-user-rng backend.

Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Message-Id: <20211012205904.4106769-3-mathieu.poirier@linaro.org>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

2 files changed, 80 insertions, 0 deletions

diff --git a/hw/virtio/meson.build b/hw/virtio/meson.build
index ae6b2cde10..521f7d64a8 100644
--- a/hw/virtio/meson.build
+++ b/hw/virtio/meson.build
@@ -28,6 +28,7 @@ virtio_ss.add(when: 'CONFIG_VIRTIO_MEM', if_true: files('virtio-mem.c'))
 virtio_ss.add(when: 'CONFIG_VHOST_USER_I2C', if_true: files('vhost-user-i2c.c'))
 virtio_ss.add(when: ['CONFIG_VIRTIO_PCI', 'CONFIG_VHOST_USER_I2C'], if_true: files('vhost-user-i2c-pci.c'))
 virtio_ss.add(when: 'CONFIG_VHOST_USER_RNG', if_true: files('vhost-user-rng.c'))
+virtio_ss.add(when: ['CONFIG_VHOST_USER_RNG', 'CONFIG_VIRTIO_PCI'], if_true: files('vhost-user-rng-pci.c'))
 
 virtio_pci_ss = ss.source_set()
 virtio_pci_ss.add(when: 'CONFIG_VHOST_VSOCK', if_true: files('vhost-vsock-pci.c'))
diff --git a/hw/virtio/vhost-user-rng-pci.c b/hw/virtio/vhost-user-rng-pci.c
new file mode 100644
index 0000000000..c83dc86813
--- /dev/null
+++ b/hw/virtio/vhost-user-rng-pci.c
@@ -0,0 +1,79 @@
+/*
+ * Vhost-user RNG virtio device PCI glue
+ *
+ * Copyright (c) 2021 Mathieu Poirier <mathieu.poirier@linaro.org>
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+#include "qemu/osdep.h"
+#include "hw/qdev-properties.h"
+#include "hw/virtio/vhost-user-rng.h"
+#include "virtio-pci.h"
+
+struct VHostUserRNGPCI {
+    VirtIOPCIProxy parent_obj;
+    VHostUserRNG vdev;
+};
+
+typedef struct VHostUserRNGPCI VHostUserRNGPCI;
+
+#define TYPE_VHOST_USER_RNG_PCI "vhost-user-rng-pci-base"
+
+DECLARE_INSTANCE_CHECKER(VHostUserRNGPCI, VHOST_USER_RNG_PCI,
+                         TYPE_VHOST_USER_RNG_PCI)
+
+static Property vhost_user_rng_pci_properties[] = {
+    DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors,
+                       DEV_NVECTORS_UNSPECIFIED),
+    DEFINE_PROP_END_OF_LIST(),
+};
+
+static void vhost_user_rng_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
+{
+    VHostUserRNGPCI *dev = VHOST_USER_RNG_PCI(vpci_dev);
+    DeviceState *vdev = DEVICE(&dev->vdev);
+
+    if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) {
+        vpci_dev->nvectors = 1;
+    }
+
+    qdev_realize(vdev, BUS(&vpci_dev->bus), errp);
+}
+
+static void vhost_user_rng_pci_class_init(ObjectClass *klass, void *data)
+{
+    DeviceClass *dc = DEVICE_CLASS(klass);
+    VirtioPCIClass *k = VIRTIO_PCI_CLASS(klass);
+    PCIDeviceClass *pcidev_k = PCI_DEVICE_CLASS(klass);
+    k->realize = vhost_user_rng_pci_realize;
+    set_bit(DEVICE_CATEGORY_INPUT, dc->categories);
+    device_class_set_props(dc, vhost_user_rng_pci_properties);
+    pcidev_k->vendor_id = PCI_VENDOR_ID_REDHAT_QUMRANET;
+    pcidev_k->device_id = 0; /* Set by virtio-pci based on virtio id */
+    pcidev_k->revision = 0x00;
+    pcidev_k->class_id = PCI_CLASS_OTHERS;
+}
+
+static void vhost_user_rng_pci_instance_init(Object *obj)
+{
+    VHostUserRNGPCI *dev = VHOST_USER_RNG_PCI(obj);
+
+    virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
+                                TYPE_VHOST_USER_RNG);
+}
+
+static const VirtioPCIDeviceTypeInfo vhost_user_rng_pci_info = {
+    .base_name = TYPE_VHOST_USER_RNG_PCI,
+    .non_transitional_name = "vhost-user-rng-pci",
+    .instance_size = sizeof(VHostUserRNGPCI),
+    .instance_init = vhost_user_rng_pci_instance_init,
+    .class_init = vhost_user_rng_pci_class_init,
+};
+
+static void vhost_user_rng_pci_register(void)
+{
+    virtio_pci_types_register(&vhost_user_rng_pci_info);
+}
+
+type_init(vhost_user_rng_pci_register);