> -----Original Message-----
> From: Maxime Coquelin <maxime.coque...@redhat.com>
> Sent: Monday, December 21, 2020 5:14 AM
> To: dev@dpdk.org; Xia, Chenbo <chenbo....@intel.com>; olivier.m...@6wind.com;
> amore...@redhat.com; david.march...@redhat.com
> Cc: Maxime Coquelin <maxime.coque...@redhat.com>
> Subject: [PATCH 21/40] net/virtio: move vring alignment to generic header
>
> This patch moves vring alignment define to the generic
> Virtio header.
>
> Signed-off-by: Maxime Coquelin <maxime.coque...@redhat.com>
> ---
> drivers/net/virtio/virtio.h | 3 +++
> drivers/net/virtio/virtio_ethdev.c | 10 +++++-----
> drivers/net/virtio/virtio_pci.c | 2 +-
> drivers/net/virtio/virtio_pci.h | 3 ---
> drivers/net/virtio/virtio_user_ethdev.c | 4 ++--
> 5 files changed, 11 insertions(+), 11 deletions(-)
>
> diff --git a/drivers/net/virtio/virtio.h b/drivers/net/virtio/virtio.h
> index f44125f48a..964e15bb22 100644
> --- a/drivers/net/virtio/virtio.h
> +++ b/drivers/net/virtio/virtio.h
> @@ -131,6 +131,9 @@
> /* Vector value used to disable MSI for queue. */
> #define VIRTIO_MSI_NO_VECTOR 0xFFFF
>
> +/* The alignment to use between consumer and producer parts of vring. */
> +#define VIRTIO_VRING_ALIGN 4096
> +
> /*
> * This structure is just a reference to read
> * net device specific config space; it just a chodu structure
> diff --git a/drivers/net/virtio/virtio_ethdev.c
> b/drivers/net/virtio/virtio_ethdev.c
> index 99a2dd24c4..1ca8715832 100644
> --- a/drivers/net/virtio/virtio_ethdev.c
> +++ b/drivers/net/virtio/virtio_ethdev.c
> @@ -407,12 +407,12 @@ virtio_init_vring(struct virtqueue *vq)
> memset(vq->vq_descx, 0, sizeof(struct vq_desc_extra) * vq->vq_nentries);
> if (virtio_with_packed_queue(vq->hw)) {
> vring_init_packed(&vq->vq_packed.ring, ring_mem,
> - VIRTIO_PCI_VRING_ALIGN, size);
> + VIRTIO_VRING_ALIGN, size);
> vring_desc_init_packed(vq, size);
> } else {
> struct vring *vr = &vq->vq_split.ring;
>
> - vring_init_split(vr, ring_mem, VIRTIO_PCI_VRING_ALIGN, size);
> + vring_init_split(vr, ring_mem, VIRTIO_VRING_ALIGN, size);
> vring_desc_init_split(vr->desc, size);
> }
> /*
> @@ -497,14 +497,14 @@ virtio_init_queue(struct rte_eth_dev *dev, uint16_t
> vtpci_queue_idx)
> /*
> * Reserve a memzone for vring elements
> */
> - size = vring_size(hw, vq_size, VIRTIO_PCI_VRING_ALIGN);
> - vq->vq_ring_size = RTE_ALIGN_CEIL(size, VIRTIO_PCI_VRING_ALIGN);
> + size = vring_size(hw, vq_size, VIRTIO_VRING_ALIGN);
> + vq->vq_ring_size = RTE_ALIGN_CEIL(size, VIRTIO_VRING_ALIGN);
> PMD_INIT_LOG(DEBUG, "vring_size: %d, rounded_vring_size: %d",
> size, vq->vq_ring_size);
>
> mz = rte_memzone_reserve_aligned(vq_name, vq->vq_ring_size,
> numa_node, RTE_MEMZONE_IOVA_CONTIG,
> - VIRTIO_PCI_VRING_ALIGN);
> + VIRTIO_VRING_ALIGN);
> if (mz == NULL) {
> if (rte_errno == EEXIST)
> mz = rte_memzone_lookup(vq_name);
> diff --git a/drivers/net/virtio/virtio_pci.c b/drivers/net/virtio/virtio_pci.c
> index 01a437a1b4..f8532c5684 100644
> --- a/drivers/net/virtio/virtio_pci.c
> +++ b/drivers/net/virtio/virtio_pci.c
> @@ -432,7 +432,7 @@ modern_setup_queue(struct virtio_hw *hw, struct virtqueue
> *vq)
> avail_addr = desc_addr + vq->vq_nentries * sizeof(struct vring_desc);
> used_addr = RTE_ALIGN_CEIL(avail_addr + offsetof(struct vring_avail,
> ring[vq->vq_nentries]),
> - VIRTIO_PCI_VRING_ALIGN);
> + VIRTIO_VRING_ALIGN);
>
> rte_write16(vq->vq_queue_index, &dev->common_cfg->queue_select);
>
> diff --git a/drivers/net/virtio/virtio_pci.h b/drivers/net/virtio/virtio_pci.h
> index 4ee890ffda..2cb3ebf93d 100644
> --- a/drivers/net/virtio/virtio_pci.h
> +++ b/drivers/net/virtio/virtio_pci.h
> @@ -122,9 +122,6 @@ struct virtio_pci_dev {
> */
> #define VIRTIO_PCI_QUEUE_ADDR_SHIFT 12
>
> -/* The alignment to use between consumer and producer parts of vring. */
> -#define VIRTIO_PCI_VRING_ALIGN 4096
> -
> /*
> * Function declaration from virtio_pci.c
> */
> diff --git a/drivers/net/virtio/virtio_user_ethdev.c
> b/drivers/net/virtio/virtio_user_ethdev.c
> index eacb268297..283f5c7a36 100644
> --- a/drivers/net/virtio/virtio_user_ethdev.c
> +++ b/drivers/net/virtio/virtio_user_ethdev.c
> @@ -388,7 +388,7 @@ virtio_user_setup_queue_packed(struct virtqueue *vq,
> sizeof(struct vring_packed_desc);
> used_addr = RTE_ALIGN_CEIL(avail_addr +
> sizeof(struct vring_packed_desc_event),
> - VIRTIO_PCI_VRING_ALIGN);
> + VIRTIO_VRING_ALIGN);
> vring->num = vq->vq_nentries;
> vring->desc = (void *)(uintptr_t)desc_addr;
> vring->driver = (void *)(uintptr_t)avail_addr;
> @@ -410,7 +410,7 @@ virtio_user_setup_queue_split(struct virtqueue *vq, struct
> virtio_user_dev *dev)
> avail_addr = desc_addr + vq->vq_nentries * sizeof(struct vring_desc);
> used_addr = RTE_ALIGN_CEIL(avail_addr + offsetof(struct vring_avail,
> ring[vq->vq_nentries]),
> - VIRTIO_PCI_VRING_ALIGN);
> + VIRTIO_VRING_ALIGN);
>
> dev->vrings[queue_idx].num = vq->vq_nentries;
> dev->vrings[queue_idx].desc = (void *)(uintptr_t)desc_addr;
> --
> 2.29.2
Reviewed-by: Chenbo Xia <chenbo....@intel.com>
