libqos: extract Legacy virtio-pci.c code
The current libqos virtio-pci.c code implements the VIRTIO Legacy interface. Extract existing code in preparation for VIRTIO 1.0 support. Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Reviewed-by: Sergio Lopez <slp@redhat.com> Reviewed-by: Thomas Huth <thuth@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Message-Id: <20191023100425.12168-16-stefanha@redhat.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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@ -35,14 +35,6 @@
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* original qvirtio_pci_destructor and qvirtio_pci_start_hw.
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* original qvirtio_pci_destructor and qvirtio_pci_start_hw.
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*/
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*/
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static inline bool qvirtio_pci_is_big_endian(QVirtioPCIDevice *dev)
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{
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QPCIBus *bus = dev->pdev->bus;
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/* FIXME: virtio 1.0 is always little-endian */
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return qtest_big_endian(bus->qts);
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}
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#define CONFIG_BASE(dev) (VIRTIO_PCI_CONFIG_OFF((dev)->pdev->msix_enabled))
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#define CONFIG_BASE(dev) (VIRTIO_PCI_CONFIG_OFF((dev)->pdev->msix_enabled))
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static uint8_t qvirtio_pci_config_readb(QVirtioDevice *d, uint64_t off)
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static uint8_t qvirtio_pci_config_readb(QVirtioDevice *d, uint64_t off)
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@ -55,8 +47,7 @@ static uint8_t qvirtio_pci_config_readb(QVirtioDevice *d, uint64_t off)
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* but virtio ( < 1.0) is in guest order
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* but virtio ( < 1.0) is in guest order
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* so with a big-endian guest the order has been reversed,
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* so with a big-endian guest the order has been reversed,
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* reverse it again
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* reverse it again
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* virtio-1.0 is always little-endian, like PCI, but this
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* virtio-1.0 is always little-endian, like PCI
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* case will be managed inside qvirtio_pci_is_big_endian()
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*/
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*/
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static uint16_t qvirtio_pci_config_readw(QVirtioDevice *d, uint64_t off)
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static uint16_t qvirtio_pci_config_readw(QVirtioDevice *d, uint64_t off)
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@ -262,7 +253,7 @@ static void qvirtio_pci_virtqueue_kick(QVirtioDevice *d, QVirtQueue *vq)
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qpci_io_writew(dev->pdev, dev->bar, VIRTIO_PCI_QUEUE_NOTIFY, vq->index);
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qpci_io_writew(dev->pdev, dev->bar, VIRTIO_PCI_QUEUE_NOTIFY, vq->index);
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}
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}
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const QVirtioBus qvirtio_pci = {
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static const QVirtioBus qvirtio_pci_legacy = {
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.config_readb = qvirtio_pci_config_readb,
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.config_readb = qvirtio_pci_config_readb,
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.config_readw = qvirtio_pci_config_readw,
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.config_readw = qvirtio_pci_config_readw,
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.config_readl = qvirtio_pci_config_readl,
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.config_readl = qvirtio_pci_config_readl,
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@ -396,17 +387,21 @@ void qvirtio_pci_start_hw(QOSGraphObject *obj)
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qvirtio_start_device(&dev->vdev);
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qvirtio_start_device(&dev->vdev);
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}
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}
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static void qvirtio_pci_init_legacy(QVirtioPCIDevice *dev)
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{
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dev->vdev.device_type = qpci_config_readw(dev->pdev, PCI_SUBSYSTEM_ID);
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dev->bar_idx = 0;
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dev->vdev.bus = &qvirtio_pci_legacy;
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dev->msix_ops = &qvirtio_pci_msix_ops_legacy;
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dev->vdev.big_endian = qtest_big_endian(dev->pdev->bus->qts);
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}
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static void qvirtio_pci_init_from_pcidev(QVirtioPCIDevice *dev, QPCIDevice *pci_dev)
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static void qvirtio_pci_init_from_pcidev(QVirtioPCIDevice *dev, QPCIDevice *pci_dev)
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{
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{
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dev->pdev = pci_dev;
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dev->pdev = pci_dev;
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dev->vdev.device_type = qpci_config_readw(pci_dev, PCI_SUBSYSTEM_ID);
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dev->bar_idx = 0;
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dev->config_msix_entry = -1;
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dev->config_msix_entry = -1;
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dev->msix_ops = &qvirtio_pci_msix_ops_legacy;
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dev->vdev.bus = &qvirtio_pci;
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qvirtio_pci_init_legacy(dev);
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dev->vdev.big_endian = qvirtio_pci_is_big_endian(dev);
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/* each virtio-xxx-pci device should override at least this function */
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/* each virtio-xxx-pci device should override at least this function */
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dev->obj.get_driver = NULL;
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dev->obj.get_driver = NULL;
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@ -45,8 +45,6 @@ typedef struct QVirtQueuePCI {
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uint32_t msix_data;
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uint32_t msix_data;
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} QVirtQueuePCI;
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} QVirtQueuePCI;
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extern const QVirtioBus qvirtio_pci;
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void virtio_pci_init(QVirtioPCIDevice *dev, QPCIBus *bus, QPCIAddress * addr);
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void virtio_pci_init(QVirtioPCIDevice *dev, QPCIBus *bus, QPCIAddress * addr);
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QVirtioPCIDevice *virtio_pci_new(QPCIBus *bus, QPCIAddress * addr);
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QVirtioPCIDevice *virtio_pci_new(QPCIBus *bus, QPCIAddress * addr);
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