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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>
This commit is contained in:
Stefan Hajnoczi 2019-10-23 11:04:24 +01:00 committed by Michael S. Tsirkin
parent f17429e545
commit 9598f9e402
2 changed files with 12 additions and 19 deletions
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29
tests/libqos/virtio-pci.c
View File

@ -35,14 +35,6 @@
* original qvirtio_pci_destructor and qvirtio_pci_start_hw.
*/
static inline bool qvirtio_pci_is_big_endian(QVirtioPCIDevice *dev)
{
QPCIBus *bus = dev->pdev->bus;
/* FIXME: virtio 1.0 is always little-endian */
return qtest_big_endian(bus->qts);
}
#define CONFIG_BASE(dev) (VIRTIO_PCI_CONFIG_OFF((dev)->pdev->msix_enabled))
static uint8_t qvirtio_pci_config_readb(QVirtioDevice *d, uint64_t off)
@ -55,8 +47,7 @@ static uint8_t qvirtio_pci_config_readb(QVirtioDevice *d, uint64_t off)
* but virtio ( < 1.0) is in guest order
* so with a big-endian guest the order has been reversed,
* reverse it again
* virtio-1.0 is always little-endian, like PCI, but this
* case will be managed inside qvirtio_pci_is_big_endian()
* virtio-1.0 is always little-endian, like PCI
*/
static uint16_t qvirtio_pci_config_readw(QVirtioDevice *d, uint64_t off)
@ -262,7 +253,7 @@ static void qvirtio_pci_virtqueue_kick(QVirtioDevice *d, QVirtQueue *vq)
qpci_io_writew(dev->pdev, dev->bar, VIRTIO_PCI_QUEUE_NOTIFY, vq->index);
}
const QVirtioBus qvirtio_pci = {
static const QVirtioBus qvirtio_pci_legacy = {
.config_readb = qvirtio_pci_config_readb,
.config_readw = qvirtio_pci_config_readw,
.config_readl = qvirtio_pci_config_readl,
@ -396,17 +387,21 @@ void qvirtio_pci_start_hw(QOSGraphObject *obj)
qvirtio_start_device(&dev->vdev);
}
static void qvirtio_pci_init_legacy(QVirtioPCIDevice *dev)
{
dev->vdev.device_type = qpci_config_readw(dev->pdev, PCI_SUBSYSTEM_ID);
dev->bar_idx = 0;
dev->vdev.bus = &qvirtio_pci_legacy;
dev->msix_ops = &qvirtio_pci_msix_ops_legacy;
dev->vdev.big_endian = qtest_big_endian(dev->pdev->bus->qts);
}
static void qvirtio_pci_init_from_pcidev(QVirtioPCIDevice *dev, QPCIDevice *pci_dev)
{
dev->pdev = pci_dev;
dev->vdev.device_type = qpci_config_readw(pci_dev, PCI_SUBSYSTEM_ID);
dev->bar_idx = 0;
dev->config_msix_entry = -1;
dev->msix_ops = &qvirtio_pci_msix_ops_legacy;
dev->vdev.bus = &qvirtio_pci;
dev->vdev.big_endian = qvirtio_pci_is_big_endian(dev);
qvirtio_pci_init_legacy(dev);
/* each virtio-xxx-pci device should override at least this function */
dev->obj.get_driver = NULL;

2
tests/libqos/virtio-pci.h
View File

@ -45,8 +45,6 @@ typedef struct QVirtQueuePCI {
uint32_t msix_data;
} QVirtQueuePCI;
extern const QVirtioBus qvirtio_pci;
void virtio_pci_init(QVirtioPCIDevice *dev, QPCIBus *bus, QPCIAddress * addr);
QVirtioPCIDevice *virtio_pci_new(QPCIBus *bus, QPCIAddress * addr);