From: Jens Freimann Date: Mon, 17 Dec 2018 21:31:32 +0000 (+0100) Subject: net/virtio: vring init for packed queues X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=f803734b0f2e6c556d9bf7fe8f11638429e3a00f;p=dpdk.git net/virtio: vring init for packed queues Add and initialize descriptor data structures. Signed-off-by: Jens Freimann Signed-off-by: Tiwei Bie Reviewed-by: Maxime Coquelin --- diff --git a/drivers/net/virtio/virtio_ethdev.c b/drivers/net/virtio/virtio_ethdev.c index cb2b2e0bfd..e6ba1282be 100644 --- a/drivers/net/virtio/virtio_ethdev.c +++ b/drivers/net/virtio/virtio_ethdev.c @@ -299,20 +299,22 @@ virtio_init_vring(struct virtqueue *vq) PMD_INIT_FUNC_TRACE(); - /* - * Reinitialise since virtio port might have been stopped and restarted - */ memset(ring_mem, 0, vq->vq_ring_size); - vring_init(vr, size, ring_mem, VIRTIO_PCI_VRING_ALIGN); + vq->vq_used_cons_idx = 0; vq->vq_desc_head_idx = 0; vq->vq_avail_idx = 0; vq->vq_desc_tail_idx = (uint16_t)(vq->vq_nentries - 1); vq->vq_free_cnt = vq->vq_nentries; memset(vq->vq_descx, 0, sizeof(struct vq_desc_extra) * vq->vq_nentries); - - vring_desc_init(vr->desc, size); - + if (vtpci_packed_queue(vq->hw)) { + vring_init_packed(&vq->ring_packed, ring_mem, + VIRTIO_PCI_VRING_ALIGN, size); + vring_desc_init_packed(vq, size); + } else { + vring_init_split(vr, ring_mem, VIRTIO_PCI_VRING_ALIGN, size); + vring_desc_init_split(vr->desc, size); + } /* * Disable device(host) interrupting guest */ @@ -384,11 +386,16 @@ virtio_init_queue(struct rte_eth_dev *dev, uint16_t vtpci_queue_idx) vq->hw = hw; vq->vq_queue_index = vtpci_queue_idx; vq->vq_nentries = vq_size; + vq->event_flags_shadow = 0; + if (vtpci_packed_queue(hw)) { + vq->avail_wrap_counter = 1; + vq->used_wrap_counter = 1; + } /* * Reserve a memzone for vring elements */ - size = vring_size(vq_size, VIRTIO_PCI_VRING_ALIGN); + size = vring_size(hw, vq_size, VIRTIO_PCI_VRING_ALIGN); vq->vq_ring_size = RTE_ALIGN_CEIL(size, VIRTIO_PCI_VRING_ALIGN); PMD_INIT_LOG(DEBUG, "vring_size: %d, rounded_vring_size: %d", size, vq->vq_ring_size); @@ -491,7 +498,8 @@ virtio_init_queue(struct rte_eth_dev *dev, uint16_t vtpci_queue_idx) for (i = 0; i < vq_size; i++) { struct vring_desc *start_dp = txr[i].tx_indir; - vring_desc_init(start_dp, RTE_DIM(txr[i].tx_indir)); + vring_desc_init_split(start_dp, + RTE_DIM(txr[i].tx_indir)); /* first indirect descriptor is always the tx header */ start_dp->addr = txvq->virtio_net_hdr_mem @@ -1488,7 +1496,8 @@ virtio_init_device(struct rte_eth_dev *eth_dev, uint64_t req_features) /* Setting up rx_header size for the device */ if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF) || - vtpci_with_feature(hw, VIRTIO_F_VERSION_1)) + vtpci_with_feature(hw, VIRTIO_F_VERSION_1) || + vtpci_with_feature(hw, VIRTIO_F_RING_PACKED)) hw->vtnet_hdr_size = sizeof(struct virtio_net_hdr_mrg_rxbuf); else hw->vtnet_hdr_size = sizeof(struct virtio_net_hdr); @@ -1908,7 +1917,8 @@ virtio_dev_configure(struct rte_eth_dev *dev) if (vtpci_with_feature(hw, VIRTIO_F_IN_ORDER)) { hw->use_inorder_tx = 1; - if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF)) { + if (vtpci_with_feature(hw, VIRTIO_NET_F_MRG_RXBUF) && + !vtpci_packed_queue(hw)) { hw->use_inorder_rx = 1; hw->use_simple_rx = 0; } else { diff --git a/drivers/net/virtio/virtio_ring.h b/drivers/net/virtio/virtio_ring.h index 464449074f..1760823c65 100644 --- a/drivers/net/virtio/virtio_ring.h +++ b/drivers/net/virtio/virtio_ring.h @@ -125,10 +125,18 @@ struct vring { #define vring_avail_event(vr) (*(uint16_t *)&(vr)->used->ring[(vr)->num]) static inline size_t -vring_size(unsigned int num, unsigned long align) +vring_size(struct virtio_hw *hw, unsigned int num, unsigned long align) { size_t size; + if (vtpci_packed_queue(hw)) { + size = num * sizeof(struct vring_packed_desc); + size += sizeof(struct vring_packed_desc_event); + size = RTE_ALIGN_CEIL(size, align); + size += sizeof(struct vring_packed_desc_event); + return size; + } + size = num * sizeof(struct vring_desc); size += sizeof(struct vring_avail) + (num * sizeof(uint16_t)); size = RTE_ALIGN_CEIL(size, align); @@ -136,10 +144,9 @@ vring_size(unsigned int num, unsigned long align) (num * sizeof(struct vring_used_elem)); return size; } - static inline void -vring_init(struct vring *vr, unsigned int num, uint8_t *p, - unsigned long align) +vring_init_split(struct vring *vr, uint8_t *p, unsigned long align, + unsigned int num) { vr->num = num; vr->desc = (struct vring_desc *) p; @@ -149,6 +156,19 @@ vring_init(struct vring *vr, unsigned int num, uint8_t *p, RTE_ALIGN_CEIL((uintptr_t)(&vr->avail->ring[num]), align); } +static inline void +vring_init_packed(struct vring_packed *vr, uint8_t *p, unsigned long align, + unsigned int num) +{ + vr->num = num; + vr->desc_packed = (struct vring_packed_desc *)p; + vr->driver_event = (struct vring_packed_desc_event *)(p + + vr->num * sizeof(struct vring_packed_desc)); + vr->device_event = (struct vring_packed_desc_event *) + RTE_ALIGN_CEIL((uintptr_t)(vr->driver_event + + sizeof(struct vring_packed_desc_event)), align); +} + /* * The following is used with VIRTIO_RING_F_EVENT_IDX. * Assuming a given event_idx value from the other size, if we have diff --git a/drivers/net/virtio/virtqueue.h b/drivers/net/virtio/virtqueue.h index b69013d01e..5c81f83772 100644 --- a/drivers/net/virtio/virtqueue.h +++ b/drivers/net/virtio/virtqueue.h @@ -278,7 +278,7 @@ vring_desc_init_packed(struct virtqueue *vq, int n) /* Chain all the descriptors in the ring with an END */ static inline void -vring_desc_init(struct vring_desc *dp, uint16_t n) +vring_desc_init_split(struct vring_desc *dp, uint16_t n) { uint16_t i;