[PATCH v3 05/11] net/virtio: free in-order descriptors before device start
From: Marvin Liu <hidden>
Date: 2018-06-28 14:06:51
Subsystem:
networking drivers, the rest · Maintainers:
Andrew Lunn, "David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
Add new function for freeing IN_ORDER descriptors. As descriptors will be allocated and freed sequentially when IN_ORDER feature was negotiated. There will be no need to utilize chain for freed descriptors management, only index update is enough. Signed-off-by: Marvin Liu <redacted>
diff --git a/drivers/net/virtio/virtio_rxtx.c b/drivers/net/virtio/virtio_rxtx.c
index 92fab2174..0bca29855 100644
--- a/drivers/net/virtio/virtio_rxtx.c
+++ b/drivers/net/virtio/virtio_rxtx.c@@ -47,6 +47,13 @@ virtio_dev_rx_queue_done(void *rxq, uint16_t offset) return VIRTQUEUE_NUSED(vq) >= offset; } +void +vq_ring_free_inorder(struct virtqueue *vq, uint16_t desc_idx, uint16_t num) +{ + vq->vq_free_cnt += num; + vq->vq_desc_tail_idx = desc_idx & (vq->vq_nentries - 1); +} + void vq_ring_free_chain(struct virtqueue *vq, uint16_t desc_idx) {
diff --git a/drivers/net/virtio/virtqueue.c b/drivers/net/virtio/virtqueue.c
index a7d0a9cbe..56a77cc71 100644
--- a/drivers/net/virtio/virtqueue.c
+++ b/drivers/net/virtio/virtqueue.c@@ -74,6 +74,14 @@ virtqueue_rxvq_flush(struct virtqueue *vq) desc_idx = used_idx; rte_pktmbuf_free(vq->sw_ring[desc_idx]); vq->vq_free_cnt++; + } else if (hw->use_inorder_rx) { + desc_idx = (uint16_t)uep->id; + dxp = &vq->vq_descx[desc_idx]; + if (dxp->cookie != NULL) { + rte_pktmbuf_free(dxp->cookie); + dxp->cookie = NULL; + } + vq_ring_free_inorder(vq, desc_idx, 1); } else { desc_idx = (uint16_t)uep->id; dxp = &vq->vq_descx[desc_idx];
diff --git a/drivers/net/virtio/virtqueue.h b/drivers/net/virtio/virtqueue.h
index 14364f356..26518ed98 100644
--- a/drivers/net/virtio/virtqueue.h
+++ b/drivers/net/virtio/virtqueue.h@@ -306,6 +306,8 @@ virtio_get_queue_type(struct virtio_hw *hw, uint16_t vtpci_queue_idx) #define VIRTQUEUE_NUSED(vq) ((uint16_t)((vq)->vq_ring.used->idx - (vq)->vq_used_cons_idx)) void vq_ring_free_chain(struct virtqueue *vq, uint16_t desc_idx); +void vq_ring_free_inorder(struct virtqueue *vq, uint16_t desc_idx, + uint16_t num); static inline void vq_update_avail_idx(struct virtqueue *vq)
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2.17.0