From: Yuanhan Liu <yuanhan.liu@linux.intel.com>
Date: Sat, 5 Nov 2016 09:41:00 +0000 (+0800)
Subject: net/virtio: initiate vring at init stage
X-Git-Tag: spdx-start~5386
X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=f4d1ad157958d8be205a9f03e55e7e09b1b25927;p=dpdk.git

net/virtio: initiate vring at init stage

virtio_dev_vring_start() is actually doing the vring initiation job.
And the vring initiation job should be done at the dev init stage, as
stated with great details in former commit.

So move it there, and rename it to virtio_init_vring().

Signed-off-by: Yuanhan Liu <yuanhan.liu@linux.intel.com>
Reviewed-by: Maxime Coquelin <maxime.coquelin@redhat.com>
---

diff --git a/drivers/net/virtio/virtio_ethdev.c b/drivers/net/virtio/virtio_ethdev.c
index 245965c9a8..7b90d71653 100644
--- a/drivers/net/virtio/virtio_ethdev.c
+++ b/drivers/net/virtio/virtio_ethdev.c
@@ -308,6 +308,35 @@ virtio_get_nr_vq(struct virtio_hw *hw)
 	return nr_vq;
 }
 
+static void
+virtio_init_vring(struct virtqueue *vq)
+{
+	int size = vq->vq_nentries;
+	struct vring *vr = &vq->vq_ring;
+	uint8_t *ring_mem = vq->vq_ring_virt_mem;
+
+	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);
+
+	/*
+	 * Disable device(host) interrupting guest
+	 */
+	virtqueue_disable_intr(vq);
+}
+
 static int
 virtio_init_queue(struct rte_eth_dev *dev, uint16_t vtpci_queue_idx)
 {
@@ -371,7 +400,6 @@ 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->vq_free_cnt = vq_size;
 
 	/*
 	 * Reserve a memzone for vring elements
@@ -402,6 +430,8 @@ virtio_init_queue(struct rte_eth_dev *dev, uint16_t vtpci_queue_idx)
 	PMD_INIT_LOG(DEBUG, "vq->vq_ring_virt_mem: 0x%" PRIx64,
 		     (uint64_t)(uintptr_t)mz->addr);
 
+	virtio_init_vring(vq);
+
 	if (sz_hdr_mz) {
 		snprintf(vq_hdr_name, sizeof(vq_hdr_name), "port%d_vq%d_hdr",
 			 dev->data->port_id, vtpci_queue_idx);
diff --git a/drivers/net/virtio/virtio_rxtx.c b/drivers/net/virtio/virtio_rxtx.c
index 6e7ff27e8e..24129d6ca2 100644
--- a/drivers/net/virtio/virtio_rxtx.c
+++ b/drivers/net/virtio/virtio_rxtx.c
@@ -378,42 +378,12 @@ virtqueue_enqueue_xmit(struct virtnet_tx *txvq, struct rte_mbuf *cookie,
 	vq_update_avail_ring(vq, head_idx);
 }
 
-static void
-virtio_dev_vring_start(struct virtqueue *vq)
-{
-	int size = vq->vq_nentries;
-	struct vring *vr = &vq->vq_ring;
-	uint8_t *ring_mem = vq->vq_ring_virt_mem;
-
-	PMD_INIT_FUNC_TRACE();
-
-	/*
-	 * Reinitialise since virtio port might have been stopped and restarted
-	 */
-	memset(vq->vq_ring_virt_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);
-
-	/*
-	 * Disable device(host) interrupting guest
-	 */
-	virtqueue_disable_intr(vq);
-}
-
 void
 virtio_dev_cq_start(struct rte_eth_dev *dev)
 {
 	struct virtio_hw *hw = dev->data->dev_private;
 
 	if (hw->cvq && hw->cvq->vq) {
-		virtio_dev_vring_start(hw->cvq->vq);
 		VIRTQUEUE_DUMP((struct virtqueue *)hw->cvq->vq);
 	}
 }
@@ -441,7 +411,6 @@ virtio_dev_rxtx_start(struct rte_eth_dev *dev)
 		int error, nbufs;
 		struct rte_mbuf *m;
 
-		virtio_dev_vring_start(vq);
 		if (rxvq->mpool == NULL) {
 			rte_exit(EXIT_FAILURE,
 				"Cannot allocate mbufs for rx virtqueue");
@@ -499,7 +468,6 @@ virtio_dev_rxtx_start(struct rte_eth_dev *dev)
 		struct virtnet_tx *txvq = dev->data->tx_queues[i];
 		struct virtqueue *vq = txvq->vq;
 
-		virtio_dev_vring_start(vq);
 		if (hw->use_simple_rxtx) {
 			uint16_t mid_idx  = vq->vq_nentries >> 1;