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Re: [PATCH v2 1/7] libqos: extract Legacy virtio-pci.c code
From: |
Sergio Lopez |
Subject: |
Re: [PATCH v2 1/7] libqos: extract Legacy virtio-pci.c code |
Date: |
Fri, 11 Oct 2019 14:20:51 +0200 |
User-agent: |
mu4e 1.2.0; emacs 26.2 |
Stefan Hajnoczi <address@hidden> writes:
> 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 <address@hidden>
> ---
> tests/libqos/virtio-pci.h | 2 --
> tests/libqos/virtio-pci.c | 25 ++++++++++---------------
> 2 files changed, 10 insertions(+), 17 deletions(-)
>
> diff --git a/tests/libqos/virtio-pci.h b/tests/libqos/virtio-pci.h
> index 728b4715f1..0d105d67b3 100644
> --- a/tests/libqos/virtio-pci.h
> +++ b/tests/libqos/virtio-pci.h
> @@ -31,8 +31,6 @@ 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);
>
> diff --git a/tests/libqos/virtio-pci.c b/tests/libqos/virtio-pci.c
> index 50499e75ef..c8d736f4d1 100644
> --- a/tests/libqos/virtio-pci.c
> +++ b/tests/libqos/virtio-pci.c
> @@ -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)
> @@ -258,7 +249,7 @@ 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,
> @@ -374,15 +365,19 @@ 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->vdev.bus = &qvirtio_pci_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->config_msix_entry = -1;
>
> - 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;
Reviewed-by: Sergio Lopez <address@hidden>
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