On Fri, Dec 16, 2022 at 8:29 AM Jason Wang <jasowang@xxxxxxxxxx> wrote:
>
> On Thu, Dec 15, 2022 at 7:32 PM Eugenio Pérez <eperezma@xxxxxxxxxx> wrote:
> >
> > Currently iova range is requested once per queue pair in the case of
> > net. Reduce the number of ioctls asking it once at initialization and
> > reusing that value for each vhost_vdpa.
> >
> > Signed-off-by: Eugenio Pérez <eperezma@xxxxxxxxxx>
> > ---
> > hw/virtio/vhost-vdpa.c | 15 ---------------
> > net/vhost-vdpa.c | 27 ++++++++++++++-------------
> > 2 files changed, 14 insertions(+), 28 deletions(-)
> >
> > diff --git a/hw/virtio/vhost-vdpa.c b/hw/virtio/vhost-vdpa.c
> > index 691bcc811a..9b7f4ef083 100644
> > --- a/hw/virtio/vhost-vdpa.c
> > +++ b/hw/virtio/vhost-vdpa.c
> > @@ -365,19 +365,6 @@ static int vhost_vdpa_add_status(struct vhost_dev *dev, uint8_t status)
> > return 0;
> > }
> >
> > -static void vhost_vdpa_get_iova_range(struct vhost_vdpa *v)
> > -{
> > - int ret = vhost_vdpa_call(v->dev, VHOST_VDPA_GET_IOVA_RANGE,
> > - &v->iova_range);
> > - if (ret != 0) {
> > - v->iova_range.first = 0;
> > - v->iova_range.last = UINT64_MAX;
> > - }
> > -
> > - trace_vhost_vdpa_get_iova_range(v->dev, v->iova_range.first,
> > - v->iova_range.last);
> > -}
> > -
> > /*
> > * The use of this function is for requests that only need to be
> > * applied once. Typically such request occurs at the beginning
> > @@ -465,8 +452,6 @@ static int vhost_vdpa_init(struct vhost_dev *dev, void *opaque, Error **errp)
> > goto err;
> > }
> >
> > - vhost_vdpa_get_iova_range(v);
> > -
> > if (!vhost_vdpa_first_dev(dev)) {
> > return 0;
> > }
> > diff --git a/net/vhost-vdpa.c b/net/vhost-vdpa.c
> > index 2c0ff6d7b0..b6462f0192 100644
> > --- a/net/vhost-vdpa.c
> > +++ b/net/vhost-vdpa.c
> > @@ -541,14 +541,15 @@ static const VhostShadowVirtqueueOps vhost_vdpa_net_svq_ops = {
> > };
> >
> > static NetClientState *net_vhost_vdpa_init(NetClientState *peer,
> > - const char *device,
> > - const char *name,
> > - int vdpa_device_fd,
> > - int queue_pair_index,
> > - int nvqs,
> > - bool is_datapath,
> > - bool svq,
> > - VhostIOVATree *iova_tree)
> > + const char *device,
> > + const char *name,
> > + int vdpa_device_fd,
> > + int queue_pair_index,
> > + int nvqs,
> > + bool is_datapath,
> > + bool svq,
> > + struct vhost_vdpa_iova_range iova_range,
> > + VhostIOVATree *iova_tree)
>
> Nit: it's better not mix style changes.
>
The style changes are because the new parameter is longer than 80
characters, do you prefer me to send a previous patch reducing
indentation?
Thanks!
> Other than this:
>
> Acked-by: Jason Wang <jasonwang@xxxxxxxxxx>
>
> Thanks
>
> > {
> > NetClientState *nc = NULL;
> > VhostVDPAState *s;
> > @@ -567,6 +568,7 @@ static NetClientState *net_vhost_vdpa_init(NetClientState *peer,
> > s->vhost_vdpa.device_fd = vdpa_device_fd;
> > s->vhost_vdpa.index = queue_pair_index;
> > s->vhost_vdpa.shadow_vqs_enabled = svq;
> > + s->vhost_vdpa.iova_range = iova_range;
> > s->vhost_vdpa.iova_tree = iova_tree;
> > if (!is_datapath) {
> > s->cvq_cmd_out_buffer = qemu_memalign(qemu_real_host_page_size(),
> > @@ -646,6 +648,7 @@ int net_init_vhost_vdpa(const Netdev *netdev, const char *name,
> > int vdpa_device_fd;
> > g_autofree NetClientState **ncs = NULL;
> > g_autoptr(VhostIOVATree) iova_tree = NULL;
> > + struct vhost_vdpa_iova_range iova_range;
> > NetClientState *nc;
> > int queue_pairs, r, i = 0, has_cvq = 0;
> >
> > @@ -689,14 +692,12 @@ int net_init_vhost_vdpa(const Netdev *netdev, const char *name,
> > return queue_pairs;
> > }
> >
> > + vhost_vdpa_get_iova_range(vdpa_device_fd, &iova_range);
> > if (opts->x_svq) {
> > - struct vhost_vdpa_iova_range iova_range;
> > -
> > if (!vhost_vdpa_net_valid_svq_features(features, errp)) {
> > goto err_svq;
> > }
> >
> > - vhost_vdpa_get_iova_range(vdpa_device_fd, &iova_range);
> > iova_tree = vhost_iova_tree_new(iova_range.first, iova_range.last);
> > }
> >
> > @@ -705,7 +706,7 @@ int net_init_vhost_vdpa(const Netdev *netdev, const char *name,
> > for (i = 0; i < queue_pairs; i++) {
> > ncs[i] = net_vhost_vdpa_init(peer, TYPE_VHOST_VDPA, name,
> > vdpa_device_fd, i, 2, true, opts->x_svq,
> > - iova_tree);
> > + iova_range, iova_tree);
> > if (!ncs[i])
> > goto err;
> > }
> > @@ -713,7 +714,7 @@ int net_init_vhost_vdpa(const Netdev *netdev, const char *name,
> > if (has_cvq) {
> > nc = net_vhost_vdpa_init(peer, TYPE_VHOST_VDPA, name,
> > vdpa_device_fd, i, 1, false,
> > - opts->x_svq, iova_tree);
> > + opts->x_svq, iova_range, iova_tree);
> > if (!nc)
> > goto err;
> > }
> > --
> > 2.31.1
> >
>
