[2/2] hw/virtio: add vhost-user-gpio-pci boilerplate

Commit Message

Viresh Kumar Jan. 12, 2022, 11:34 a.m. UTC

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

Signed-off-by: Viresh Kumar <[e-mail]>
---
 hw/virtio/meson.build           |  1 +
 hw/virtio/vhost-user-gpio-pci.c | 69 +++++++++++++++++++++++++++++++++
 2 files changed, 70 insertions(+)
 create mode 100644 hw/virtio/vhost-user-gpio-pci.c

Comments

Alex Bennée Jan. 14, 2022, 2:10 p.m. UTC | #1

Viresh Kumar <[e-mail]> writes:

> This allows is to instantiate a vhost-user-gpio device as part of a PCI
> bus. It is mostly boilerplate which looks pretty similar to the
> vhost-user-fs-pci device.
>
> Signed-off-by: Viresh Kumar <[e-mail]>

Reviewed-by: Alex Bennée <[e-mail]>

Patch

diff --git a/hw/virtio/meson.build b/hw/virtio/meson.build
index c7e67adff337..fe6a4e9acb2a 100644
--- a/hw/virtio/meson.build
+++ b/hw/virtio/meson.build
@@ -30,6 +30,7 @@  virtio_ss.add(when: ['CONFIG_VIRTIO_PCI', 'CONFIG_VHOST_USER_I2C'], if_true: fil
 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_ss.add(when: 'CONFIG_VHOST_USER_GPIO', if_true: files('vhost-user-gpio.c'))
+virtio_ss.add(when: ['CONFIG_VIRTIO_PCI', 'CONFIG_VHOST_USER_GPIO'], if_true: files('vhost-user-gpio-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-gpio-pci.c b/hw/virtio/vhost-user-gpio-pci.c
new file mode 100644
index 000000000000..8dd042d5e1c1
--- /dev/null
+++ b/hw/virtio/vhost-user-gpio-pci.c
@@ -0,0 +1,69 @@ 
+/*
+ * Vhost-user gpio virtio device PCI glue
+ *
+ * Copyright (c) 2022 Viresh Kumar <[e-mail]>
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+#include "qemu/osdep.h"
+#include "hw/qdev-properties.h"
+#include "hw/virtio/vhost-user-gpio.h"
+#include "virtio-pci.h"
+
+struct VHostUserGPIOPCI {
+    VirtIOPCIProxy parent_obj;
+    VHostUserGPIO vdev;
+};
+
+typedef struct VHostUserGPIOPCI VHostUserGPIOPCI;
+
+#define TYPE_VHOST_USER_GPIO_PCI "vhost-user-gpio-pci-base"
+
+DECLARE_INSTANCE_CHECKER(VHostUserGPIOPCI, VHOST_USER_GPIO_PCI,
+                         TYPE_VHOST_USER_GPIO_PCI)
+
+static void vhost_user_gpio_pci_realize(VirtIOPCIProxy *vpci_dev, Error **errp)
+{
+    VHostUserGPIOPCI *dev = VHOST_USER_GPIO_PCI(vpci_dev);
+    DeviceState *vdev = DEVICE(&dev->vdev);
+
+    vpci_dev->nvectors = 1;
+    qdev_realize(vdev, BUS(&vpci_dev->bus), errp);
+}
+
+static void vhost_user_gpio_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_gpio_pci_realize;
+    set_bit(DEVICE_CATEGORY_INPUT, dc->categories);
+    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_COMMUNICATION_OTHER;
+}
+
+static void vhost_user_gpio_pci_instance_init(Object *obj)
+{
+    VHostUserGPIOPCI *dev = VHOST_USER_GPIO_PCI(obj);
+
+    virtio_instance_init_common(obj, &dev->vdev, sizeof(dev->vdev),
+                                TYPE_VHOST_USER_GPIO);
+}
+
+static const VirtioPCIDeviceTypeInfo vhost_user_gpio_pci_info = {
+    .base_name = TYPE_VHOST_USER_GPIO_PCI,
+    .non_transitional_name = "vhost-user-gpio-pci",
+    .instance_size = sizeof(VHostUserGPIOPCI),
+    .instance_init = vhost_user_gpio_pci_instance_init,
+    .class_init = vhost_user_gpio_pci_class_init,
+};
+
+static void vhost_user_gpio_pci_register(void)
+{
+    virtio_pci_types_register(&vhost_user_gpio_pci_info);
+}
+
+type_init(vhost_user_gpio_pci_register);