> -----Original Message-----
> From: Yuanhan Liu [mailto:yuanhan....@linux.intel.com]
> Sent: Friday, March 17, 2017 2:48 PM
> To: Tan, Jianfeng
> Cc: dev@dpdk.org; david.march...@6wind.com
> Subject: Re: [PATCH 2/5] net/virtio-user: add rxq interrupt mode support
>
> On Fri, Mar 03, 2017 at 05:56:40PM +0000, Jianfeng Tan wrote:
> > Signed-off-by: Jianfeng Tan <jianfeng....@intel.com>
>
> I don't see a single word to explain how this patch works :/
Sorry, will add that in next version.
>
> > ---
> > drivers/net/virtio/virtio_ethdev.c | 17 ++++++++++++++--
> > drivers/net/virtio/virtio_user/virtio_user_dev.c | 25
> +++++++++++++++++++++++-
> > drivers/net/virtio/virtio_user/virtio_user_dev.h | 2 +-
> > drivers/net/virtio/virtio_user_ethdev.c | 12 +++++++++++-
> > 4 files changed, 51 insertions(+), 5 deletions(-)
> >
> > diff --git a/drivers/net/virtio/virtio_ethdev.c
> b/drivers/net/virtio/virtio_ethdev.c
> > index 4dc03b9..5d80d1a 100644
> > --- a/drivers/net/virtio/virtio_ethdev.c
> > +++ b/drivers/net/virtio/virtio_ethdev.c
> > @@ -1264,6 +1264,10 @@ virtio_configure_intr(struct rte_eth_dev *dev)
> > {
> > struct virtio_hw *hw = dev->data->dev_private;
> >
> > +
> > +#ifdef RTE_VIRTIO_USER
> > + if (!hw->virtio_user_dev) {
> > +#endif
>
> No need to put the #ifdef block here. virtio_user_dev is defined even
> when RTE_VIRTIO_USER is not configured.
Correct. I'll remove that.
>
> ...
>
> > + vtpci_reinit_complete(hw);
> > +
> > if (eth_dev->data->dev_conf.intr_conf.rxq) {
> > if (virtio_configure_intr(eth_dev) < 0) {
> > PMD_INIT_LOG(ERR, "failed to configure interrupt");
> > @@ -1416,8 +1431,6 @@ virtio_init_device(struct rte_eth_dev *eth_dev,
> uint64_t req_features)
> > }
> > }
> >
> > - vtpci_reinit_complete(hw);
>
>
> Hmm, why ...? Such stealthy change definitely need an explanation.
> And it's more likely it needs a single patch.
I should have described it more. The reason of above change is to make sure
intr_handle is filled in virtio_user_start_device(). But reconsidering this,
this could have effect on virtio pci device as it requires interrupts are set
up before setting DRIVER_OK. So how about:
1. configure intr for PCI devices;
2. vtpci_reinit_complete();
3. configure intr for vdev;
Thanks,
Jianfeng
