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Date: Wed, 9 Mar 2022 17:34:32 +0800
From: Xuan Zhuo <xuanzhuo@...ux.alibaba.com>
To: Jason Wang <jasowang@...hat.com>
Cc: Jeff Dike <jdike@...toit.com>, Richard Weinberger <richard@....at>,
Anton Ivanov <anton.ivanov@...bridgegreys.com>,
"Michael S. Tsirkin" <mst@...hat.com>,
"David S. Miller" <davem@...emloft.net>,
Jakub Kicinski <kuba@...nel.org>,
Hans de Goede <hdegoede@...hat.com>,
Mark Gross <markgross@...nel.org>,
Vadim Pasternak <vadimp@...dia.com>,
Bjorn Andersson <bjorn.andersson@...aro.org>,
Mathieu Poirier <mathieu.poirier@...aro.org>,
Cornelia Huck <cohuck@...hat.com>,
Halil Pasic <pasic@...ux.ibm.com>,
Heiko Carstens <hca@...ux.ibm.com>,
Vasily Gorbik <gor@...ux.ibm.com>,
Christian Borntraeger <borntraeger@...ux.ibm.com>,
Alexander Gordeev <agordeev@...ux.ibm.com>,
Sven Schnelle <svens@...ux.ibm.com>,
Alexei Starovoitov <ast@...nel.org>,
Daniel Borkmann <daniel@...earbox.net>,
Jesper Dangaard Brouer <hawk@...nel.org>,
John Fastabend <john.fastabend@...il.com>,
Johannes Berg <johannes.berg@...el.com>,
Vincent Whitchurch <vincent.whitchurch@...s.com>,
linux-um@...ts.infradead.org, platform-driver-x86@...r.kernel.org,
linux-remoteproc@...r.kernel.org, linux-s390@...r.kernel.org,
kvm@...r.kernel.org, bpf@...r.kernel.org,
virtualization@...ts.linux-foundation.org, netdev@...r.kernel.org
Subject: Re: [PATCH v7 18/26] virtio: find_vqs() add arg sizes
On Wed, 9 Mar 2022 16:59:32 +0800, Jason Wang <jasowang@...hat.com> wrote:
>
> 在 2022/3/8 下午8:35, Xuan Zhuo 写道:
> > find_vqs() adds a new parameter sizes to specify the size of each vq
> > vring.
> >
> > 0 means use the maximum size supported by the backend.
> >
> > In the split scenario, the meaning of size is the largest size, because
> > it may be limited by memory, the virtio core will try a smaller size.
> > And the size is power of 2.
> >
> > Signed-off-by: Xuan Zhuo <xuanzhuo@...ux.alibaba.com>
> > ---
> > arch/um/drivers/virtio_uml.c | 2 +-
> > drivers/platform/mellanox/mlxbf-tmfifo.c | 3 ++-
> > drivers/remoteproc/remoteproc_virtio.c | 2 +-
> > drivers/s390/virtio/virtio_ccw.c | 2 +-
> > drivers/virtio/virtio_mmio.c | 2 +-
> > drivers/virtio/virtio_pci_common.c | 2 +-
> > drivers/virtio/virtio_pci_common.h | 2 +-
> > drivers/virtio/virtio_pci_modern.c | 5 +++--
> > drivers/virtio/virtio_vdpa.c | 2 +-
> > include/linux/virtio_config.h | 11 +++++++----
> > 10 files changed, 19 insertions(+), 14 deletions(-)
> >
> > diff --git a/arch/um/drivers/virtio_uml.c b/arch/um/drivers/virtio_uml.c
> > index ba562d68dc04..055b91ccbe8a 100644
> > --- a/arch/um/drivers/virtio_uml.c
> > +++ b/arch/um/drivers/virtio_uml.c
> > @@ -998,7 +998,7 @@ static struct virtqueue *vu_setup_vq(struct virtio_device *vdev,
> > static int vu_find_vqs(struct virtio_device *vdev, unsigned nvqs,
> > struct virtqueue *vqs[], vq_callback_t *callbacks[],
> > const char * const names[], const bool *ctx,
> > - struct irq_affinity *desc)
> > + struct irq_affinity *desc, u32 sizes[])
> > {
> > struct virtio_uml_device *vu_dev = to_virtio_uml_device(vdev);
> > int i, queue_idx = 0, rc;
> > diff --git a/drivers/platform/mellanox/mlxbf-tmfifo.c b/drivers/platform/mellanox/mlxbf-tmfifo.c
> > index 38800e86ed8a..aea7aa218b22 100644
> > --- a/drivers/platform/mellanox/mlxbf-tmfifo.c
> > +++ b/drivers/platform/mellanox/mlxbf-tmfifo.c
> > @@ -929,7 +929,8 @@ static int mlxbf_tmfifo_virtio_find_vqs(struct virtio_device *vdev,
> > vq_callback_t *callbacks[],
> > const char * const names[],
>
>
> Nit: Let's be consistent here, e.g move sizes before ctx (this is what
> next patch did and seems cleaner).
OK.
Thanks.
>
> Thanks
>
>
> > const bool *ctx,
> > - struct irq_affinity *desc)
> > + struct irq_affinity *desc,
> > + u32 sizes[])
> > {
> > struct mlxbf_tmfifo_vdev *tm_vdev = mlxbf_vdev_to_tmfifo(vdev);
> > struct mlxbf_tmfifo_vring *vring;
> > diff --git a/drivers/remoteproc/remoteproc_virtio.c b/drivers/remoteproc/remoteproc_virtio.c
> > index 70ab496d0431..3a167bec5b09 100644
> > --- a/drivers/remoteproc/remoteproc_virtio.c
> > +++ b/drivers/remoteproc/remoteproc_virtio.c
> > @@ -157,7 +157,7 @@ static int rproc_virtio_find_vqs(struct virtio_device *vdev, unsigned int nvqs,
> > vq_callback_t *callbacks[],
> > const char * const names[],
> > const bool * ctx,
> > - struct irq_affinity *desc)
> > + struct irq_affinity *desc, u32 sizes[])
> > {
> > int i, ret, queue_idx = 0;
> >
> > diff --git a/drivers/s390/virtio/virtio_ccw.c b/drivers/s390/virtio/virtio_ccw.c
> > index d35e7a3f7067..b74e08c71534 100644
> > --- a/drivers/s390/virtio/virtio_ccw.c
> > +++ b/drivers/s390/virtio/virtio_ccw.c
> > @@ -632,7 +632,7 @@ static int virtio_ccw_find_vqs(struct virtio_device *vdev, unsigned nvqs,
> > vq_callback_t *callbacks[],
> > const char * const names[],
> > const bool *ctx,
> > - struct irq_affinity *desc)
> > + struct irq_affinity *desc, u32 sizes[])
> > {
> > struct virtio_ccw_device *vcdev = to_vc_device(vdev);
> > unsigned long *indicatorp = NULL;
> > diff --git a/drivers/virtio/virtio_mmio.c b/drivers/virtio/virtio_mmio.c
> > index a41abc8051b9..55d575f6ef2d 100644
> > --- a/drivers/virtio/virtio_mmio.c
> > +++ b/drivers/virtio/virtio_mmio.c
> > @@ -462,7 +462,7 @@ static int vm_find_vqs(struct virtio_device *vdev, unsigned nvqs,
> > vq_callback_t *callbacks[],
> > const char * const names[],
> > const bool *ctx,
> > - struct irq_affinity *desc)
> > + struct irq_affinity *desc, u32 sizes[])
> > {
> > struct virtio_mmio_device *vm_dev = to_virtio_mmio_device(vdev);
> > int irq = platform_get_irq(vm_dev->pdev, 0);
> > diff --git a/drivers/virtio/virtio_pci_common.c b/drivers/virtio/virtio_pci_common.c
> > index 863d3a8a0956..8e8fa7e5ad80 100644
> > --- a/drivers/virtio/virtio_pci_common.c
> > +++ b/drivers/virtio/virtio_pci_common.c
> > @@ -428,7 +428,7 @@ static int vp_find_vqs_intx(struct virtio_device *vdev, unsigned nvqs,
> > int vp_find_vqs(struct virtio_device *vdev, unsigned nvqs,
> > struct virtqueue *vqs[], vq_callback_t *callbacks[],
> > const char * const names[], const bool *ctx,
> > - struct irq_affinity *desc)
> > + struct irq_affinity *desc, u32 sizes[])
> > {
> > int err;
> >
> > diff --git a/drivers/virtio/virtio_pci_common.h b/drivers/virtio/virtio_pci_common.h
> > index 23f6c5c678d5..9dbf1d555dff 100644
> > --- a/drivers/virtio/virtio_pci_common.h
> > +++ b/drivers/virtio/virtio_pci_common.h
> > @@ -114,7 +114,7 @@ void vp_del_vqs(struct virtio_device *vdev);
> > int vp_find_vqs(struct virtio_device *vdev, unsigned nvqs,
> > struct virtqueue *vqs[], vq_callback_t *callbacks[],
> > const char * const names[], const bool *ctx,
> > - struct irq_affinity *desc);
> > + struct irq_affinity *desc, u32 sizes[]);
> > const char *vp_bus_name(struct virtio_device *vdev);
> >
> > /* Setup the affinity for a virtqueue:
> > diff --git a/drivers/virtio/virtio_pci_modern.c b/drivers/virtio/virtio_pci_modern.c
> > index 3c67d3607802..342795175c29 100644
> > --- a/drivers/virtio/virtio_pci_modern.c
> > +++ b/drivers/virtio/virtio_pci_modern.c
> > @@ -343,11 +343,12 @@ static int vp_modern_find_vqs(struct virtio_device *vdev, unsigned nvqs,
> > struct virtqueue *vqs[],
> > vq_callback_t *callbacks[],
> > const char * const names[], const bool *ctx,
> > - struct irq_affinity *desc)
> > + struct irq_affinity *desc, u32 sizes[])
> > {
> > struct virtio_pci_device *vp_dev = to_vp_device(vdev);
> > struct virtqueue *vq;
> > - int rc = vp_find_vqs(vdev, nvqs, vqs, callbacks, names, ctx, desc);
> > + int rc = vp_find_vqs(vdev, nvqs, vqs, callbacks, names, ctx, desc,
> > + sizes);
> >
> > if (rc)
> > return rc;
> > diff --git a/drivers/virtio/virtio_vdpa.c b/drivers/virtio/virtio_vdpa.c
> > index 7767a7f0119b..ee08d01ee8b1 100644
> > --- a/drivers/virtio/virtio_vdpa.c
> > +++ b/drivers/virtio/virtio_vdpa.c
> > @@ -268,7 +268,7 @@ static int virtio_vdpa_find_vqs(struct virtio_device *vdev, unsigned nvqs,
> > vq_callback_t *callbacks[],
> > const char * const names[],
> > const bool *ctx,
> > - struct irq_affinity *desc)
> > + struct irq_affinity *desc, u32 sizes[])
> > {
> > struct virtio_vdpa_device *vd_dev = to_virtio_vdpa_device(vdev);
> > struct vdpa_device *vdpa = vd_get_vdpa(vdev);
> > diff --git a/include/linux/virtio_config.h b/include/linux/virtio_config.h
> > index 0b81fbe17c85..5157524d8036 100644
> > --- a/include/linux/virtio_config.h
> > +++ b/include/linux/virtio_config.h
> > @@ -57,6 +57,7 @@ struct virtio_shm_region {
> > * include a NULL entry for vqs that do not need a callback
> > * names: array of virtqueue names (mainly for debugging)
> > * include a NULL entry for vqs unused by driver
> > + * sizes: array of virtqueue sizes
> > * Returns 0 on success or error status
> > * @del_vqs: free virtqueues found by find_vqs().
> > * @get_features: get the array of feature bits for this device.
> > @@ -98,7 +99,8 @@ struct virtio_config_ops {
> > int (*find_vqs)(struct virtio_device *, unsigned nvqs,
> > struct virtqueue *vqs[], vq_callback_t *callbacks[],
> > const char * const names[], const bool *ctx,
> > - struct irq_affinity *desc);
> > + struct irq_affinity *desc,
> > + u32 sizes[]);
> > void (*del_vqs)(struct virtio_device *);
> > u64 (*get_features)(struct virtio_device *vdev);
> > int (*finalize_features)(struct virtio_device *vdev);
> > @@ -205,7 +207,7 @@ struct virtqueue *virtio_find_single_vq(struct virtio_device *vdev,
> > const char *names[] = { n };
> > struct virtqueue *vq;
> > int err = vdev->config->find_vqs(vdev, 1, &vq, callbacks, names, NULL,
> > - NULL);
> > + NULL, NULL);
> > if (err < 0)
> > return ERR_PTR(err);
> > return vq;
> > @@ -217,7 +219,8 @@ int virtio_find_vqs(struct virtio_device *vdev, unsigned nvqs,
> > const char * const names[],
> > struct irq_affinity *desc)
> > {
> > - return vdev->config->find_vqs(vdev, nvqs, vqs, callbacks, names, NULL, desc);
> > + return vdev->config->find_vqs(vdev, nvqs, vqs, callbacks, names, NULL,
> > + desc, NULL);
> > }
> >
> > static inline
> > @@ -227,7 +230,7 @@ int virtio_find_vqs_ctx(struct virtio_device *vdev, unsigned nvqs,
> > struct irq_affinity *desc)
> > {
> > return vdev->config->find_vqs(vdev, nvqs, vqs, callbacks, names, ctx,
> > - desc);
> > + desc, NULL);
> > }
> >
> > /**
>
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