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SubjectRe: [PATCH V3 2/2] vdpa: implement config interrupt in IFCVF
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On 2020/4/26 下午4:42, Zhu Lingshan wrote:
> This commit implements config interrupt support
> in IFC VF
>
> Signed-off-by: Zhu Lingshan <lingshan.zhu@intel.com>
> ---
> drivers/vdpa/ifcvf/ifcvf_base.c | 3 +++
> drivers/vdpa/ifcvf/ifcvf_base.h | 3 +++
> drivers/vdpa/ifcvf/ifcvf_main.c | 22 +++++++++++++++++++++-
> 3 files changed, 27 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/vdpa/ifcvf/ifcvf_base.c b/drivers/vdpa/ifcvf/ifcvf_base.c
> index b61b06e..c825d99 100644
> --- a/drivers/vdpa/ifcvf/ifcvf_base.c
> +++ b/drivers/vdpa/ifcvf/ifcvf_base.c
> @@ -185,6 +185,9 @@ void ifcvf_set_status(struct ifcvf_hw *hw, u8 status)
>
> void ifcvf_reset(struct ifcvf_hw *hw)
> {
> + hw->config_cb.callback = NULL;
> + hw->config_cb.private = NULL;
> +
> ifcvf_set_status(hw, 0);
> /* flush set_status, make sure VF is stopped, reset */
> ifcvf_get_status(hw);
> diff --git a/drivers/vdpa/ifcvf/ifcvf_base.h b/drivers/vdpa/ifcvf/ifcvf_base.h
> index e803070..23ac47d 100644
> --- a/drivers/vdpa/ifcvf/ifcvf_base.h
> +++ b/drivers/vdpa/ifcvf/ifcvf_base.h
> @@ -27,6 +27,7 @@
> ((1ULL << VIRTIO_NET_F_MAC) | \
> (1ULL << VIRTIO_F_ANY_LAYOUT) | \
> (1ULL << VIRTIO_F_VERSION_1) | \
> + (1ULL << VIRTIO_NET_F_STATUS) | \
> (1ULL << VIRTIO_F_ORDER_PLATFORM) | \
> (1ULL << VIRTIO_F_IOMMU_PLATFORM) | \
> (1ULL << VIRTIO_NET_F_MRG_RXBUF))
> @@ -81,6 +82,8 @@ struct ifcvf_hw {
> void __iomem *net_cfg;
> struct vring_info vring[IFCVF_MAX_QUEUE_PAIRS * 2];
> void __iomem * const *base;
> + char config_msix_name[256];
> + struct vdpa_callback config_cb;
> };
>
> struct ifcvf_adapter {
> diff --git a/drivers/vdpa/ifcvf/ifcvf_main.c b/drivers/vdpa/ifcvf/ifcvf_main.c
> index 8d54dc5..f7baeca 100644
> --- a/drivers/vdpa/ifcvf/ifcvf_main.c
> +++ b/drivers/vdpa/ifcvf/ifcvf_main.c
> @@ -18,6 +18,16 @@
> #define DRIVER_AUTHOR "Intel Corporation"
> #define IFCVF_DRIVER_NAME "ifcvf"
>
> +static irqreturn_t ifcvf_config_changed(int irq, void *arg)
> +{
> + struct ifcvf_hw *vf = arg;
> +
> + if (vf->config_cb.callback)
> + return vf->config_cb.callback(vf->config_cb.private);
> +
> + return IRQ_HANDLED;
> +}
> +
> static irqreturn_t ifcvf_intr_handler(int irq, void *arg)
> {
> struct vring_info *vring = arg;
> @@ -256,7 +266,10 @@ static void ifcvf_vdpa_set_config(struct vdpa_device *vdpa_dev,
> static void ifcvf_vdpa_set_config_cb(struct vdpa_device *vdpa_dev,
> struct vdpa_callback *cb)
> {
> - /* We don't support config interrupt */
> + struct ifcvf_hw *vf = vdpa_to_vf(vdpa_dev);
> +
> + vf->config_cb.callback = cb->callback;
> + vf->config_cb.private = cb->private;
> }
>
> /*
> @@ -292,6 +305,13 @@ static int ifcvf_request_irq(struct ifcvf_adapter *adapter)
> struct ifcvf_hw *vf = &adapter->vf;
> int vector, i, ret, irq;
>
> + snprintf(vf->config_msix_name, 256, "ifcvf[%s]-config\n",
> + pci_name(pdev));
> + vector = 0;
> + irq = pci_irq_vector(pdev, vector);


Nitpick, we can just use pci_irq_vecotr(pdev, 0);

vector will be reassigned soon :)

Thanks


> + ret = devm_request_irq(&pdev->dev, irq,
> + ifcvf_config_changed, 0,
> + vf->config_msix_name, vf);
>
> for (i = 0; i < IFCVF_MAX_QUEUE_PAIRS * 2; i++) {
> snprintf(vf->vring[i].msix_name, 256, "ifcvf[%s]-%d\n",

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