Introduce Virtio-loopback epsilon release:

Epsilon release introduces a new compatibility layer which make virtio-loopback
design to work with QEMU and rust-vmm vhost-user backend without require any
changes.

Signed-off-by: Timos Ampelikiotis <t.ampelikiotis@virtualopensystems.com>
Change-Id: I52e57563e08a7d0bdc002f8e928ee61ba0c53dd9

1 files changed, 86 insertions, 0 deletions

diff --git a/tests/qtest/libqos/virtio-pci.h b/tests/qtest/libqos/virtio-pci.h
new file mode 100644
index 000000000..f5115cacb
--- /dev/null
+++ b/tests/qtest/libqos/virtio-pci.h
@@ -0,0 +1,86 @@
+/*
+ * libqos virtio PCI definitions
+ *
+ * Copyright (c) 2014 Marc Marí
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ */
+
+#ifndef LIBQOS_VIRTIO_PCI_H
+#define LIBQOS_VIRTIO_PCI_H
+
+#include "virtio.h"
+#include "pci.h"
+#include "qgraph.h"
+
+typedef struct QVirtioPCIMSIXOps QVirtioPCIMSIXOps;
+
+typedef struct QVirtioPCIDevice {
+    QOSGraphObject obj;
+    QVirtioDevice vdev;
+    QPCIDevice *pdev;
+    QPCIBar bar;
+    const QVirtioPCIMSIXOps *msix_ops;
+    uint16_t config_msix_entry;
+    uint64_t config_msix_addr;
+    uint32_t config_msix_data;
+
+    int bar_idx;
+
+    /* VIRTIO 1.0 */
+    uint32_t common_cfg_offset;
+    uint32_t notify_cfg_offset;
+    uint32_t notify_off_multiplier;
+    uint32_t isr_cfg_offset;
+    uint32_t device_cfg_offset;
+} QVirtioPCIDevice;
+
+struct QVirtioPCIMSIXOps {
+    /* Set the Configuration Vector for MSI-X */
+    void (*set_config_vector)(QVirtioPCIDevice *d, uint16_t entry);
+
+    /* Set the Queue Vector for MSI-X */
+    void (*set_queue_vector)(QVirtioPCIDevice *d, uint16_t vq_idx,
+                             uint16_t entry);
+};
+
+typedef struct QVirtQueuePCI {
+    QVirtQueue vq;
+    uint16_t msix_entry;
+    uint64_t msix_addr;
+    uint32_t msix_data;
+
+    /* VIRTIO 1.0 */
+    uint64_t notify_offset;
+} QVirtQueuePCI;
+
+void virtio_pci_init(QVirtioPCIDevice *dev, QPCIBus *bus, QPCIAddress * addr);
+QVirtioPCIDevice *virtio_pci_new(QPCIBus *bus, QPCIAddress * addr);
+
+/* virtio-pci object functions available for subclasses that
+ * override the original start_hw and destroy
+ * function. All virtio-xxx-pci subclass that override must
+ * take care of calling these two functions in the respective
+ * places
+ */
+void qvirtio_pci_destructor(QOSGraphObject *obj);
+void qvirtio_pci_start_hw(QOSGraphObject *obj);
+
+
+void qvirtio_pci_device_enable(QVirtioPCIDevice *d);
+void qvirtio_pci_device_disable(QVirtioPCIDevice *d);
+
+void qvirtio_pci_set_msix_configuration_vector(QVirtioPCIDevice *d,
+                                        QGuestAllocator *alloc, uint16_t entry);
+void qvirtqueue_pci_msix_setup(QVirtioPCIDevice *d, QVirtQueuePCI *vqpci,
+                                        QGuestAllocator *alloc, uint16_t entry);
+
+/* Used by Legacy and Modern virtio-pci code */
+QVirtQueue *qvirtio_pci_virtqueue_setup_common(QVirtioDevice *d,
+                                               QGuestAllocator *alloc,
+                                               uint16_t index);
+void qvirtio_pci_virtqueue_cleanup_common(QVirtQueue *vq,
+                                          QGuestAllocator *alloc);
+
+#endif