[RFC PATCH 04/19] hw/block: add vhost-user-rpmb-pci boilerplate

[Alex Bennée]

This allows is to instantiate a vhost-user-rpmb device as part of a
PCI bus. It is mostly boilerplate which looks pretty similar to the
vhost-user-fs-pci device if you squint.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>

---
  - enable use IOEVENTFD flag
  - swap obj set bool args
---
 hw/block/vhost-user-rpmb-pci.c | 82 ++++++++++++++++++++++++++++++++++
 hw/block/meson.build           |  2 +
 2 files changed, 84 insertions(+)
 create mode 100644 hw/block/vhost-user-rpmb-pci.c

diff --git a/hw/block/vhost-user-rpmb-pci.c b/hw/block/vhost-user-rpmb-pci.c
new file mode 100644
index 000000000000..f0518305a1d9
--- /dev/null
+++ b/hw/block/vhost-user-rpmb-pci.c
@@ -0,0 +1,82 @@
+/*
+ * Vhost-user RPMB virtio device PCI glue
+ *
+ * Copyright (c) 2020 Linaro Ltd
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+#include "qemu/osdep.h"
+#include "hw/qdev-properties.h"
+#include "hw/virtio/vhost-user-rpmb.h"
+#include "hw/virtio/virtio-pci.h"
+
+struct VHostUserRPMBPCI {
+    VirtIOPCIProxy parent_obj;
+    VHostUserRPMB vdev;
+};
+
+typedef struct VHostUserRPMBPCI VHostUserRPMBPCI;
+
+#define TYPE_VHOST_USER_RPMB_PCI "vhost-user-rpmb-pci-base"
+
+#define VHOST_USER_RPMB_PCI(obj) \
+        OBJECT_CHECK(VHostUserRPMBPCI, (obj), TYPE_VHOST_USER_RPMB_PCI)
+
+static Property vurpmb_pci_properties[] = {
+    DEFINE_PROP_BIT("ioeventfd", VirtIOPCIProxy, flags,
+                    VIRTIO_PCI_FLAG_USE_IOEVENTFD_BIT, true),
+    DEFINE_PROP_UINT32("vectors", VirtIOPCIProxy, nvectors,
+                       DEV_NVECTORS_UNSPECIFIED),
+    DEFINE_PROP_END_OF_LIST(),
+};
+
+static void vurpmb_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
+{
+    VHostUserRPMBPCI *dev = VHOST_USER_RPMB_PCI(vpci_dev);
+    DeviceState *vdev = DEVICE(&dev->vdev);
+
+    if (vpci_dev->nvectors == DEV_NVECTORS_UNSPECIFIED) {
+        vpci_dev->nvectors = 1;
+    }
+
+    qdev_set_parent_bus(vdev, BUS(&vpci_dev->bus));
+    object_property_set_bool(OBJECT(vdev), "realized", true, errp);
+}
+
+static void vurpmb_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 = vurpmb_pci_realize;
+    set_bit(DEVICE_CATEGORY_STORAGE, dc->categories);
+    device_class_set_props(dc, vurpmb_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_STORAGE_OTHER;
+}
+
+static void vurpmb_pci_instance_init(Object *obj)
+{
+    VHostUserRPMBPCI *dev = VHOST_USER_RPMB_PCI(obj);
+
+    virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
+                                TYPE_VHOST_USER_RPMB);
+}
+
+static const VirtioPCIDeviceTypeInfo vurpmb_pci_info = {
+    .base_name             = TYPE_VHOST_USER_RPMB_PCI,
+    .non_transitional_name = "vhost-user-rpmb-pci",
+    .instance_size = sizeof(VHostUserRPMBPCI),
+    .instance_init = vurpmb_pci_instance_init,
+    .class_init    = vurpmb_pci_class_init,
+};
+
+static void vurpmb_pci_register(void)
+{
+    virtio_pci_types_register(&vurpmb_pci_info);
+}
+
+type_init(vurpmb_pci_register);
diff --git a/hw/block/meson.build b/hw/block/meson.build
index 114222f18424..0b2d10201e28 100644
--- a/hw/block/meson.build
+++ b/hw/block/meson.build
@@ -18,5 +18,7 @@ softmmu_ss.add(when: 'CONFIG_NVME_PCI', if_true: 
files('nvme.c'))
 specific_ss.add(when: 'CONFIG_VIRTIO_BLK', if_true: files('virtio-blk.c'))
 specific_ss.add(when: 'CONFIG_VHOST_USER_BLK', if_true: 
files('vhost-user-blk.c'))
 specific_ss.add(when: 'CONFIG_VHOST_USER_RPMB', if_true: 
files('vhost-user-rpmb.c'))
+specific_ss.add(when: ['CONFIG_VHOST_USER_RPMB', 'CONFIG_VIRTIO_PCI' ],
+                if_true: files('vhost-user-rpmb-pci.c'))
 
 subdir('dataplane')
-- 
2.20.1