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dpdk/SOURCES/0003-net-virtio-vring-init-...

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From 4e832cad1879f87a694e2f78b8718f986f7c76e2 Mon Sep 17 00:00:00 2001
From: Jens Freimann <jfreimann@redhat.com>
Date: Mon, 17 Dec 2018 22:31:32 +0100
Subject: [PATCH 03/18] net/virtio: vring init for packed queues
[ upstream commit f803734b0f2e6c556d9bf7fe8f11638429e3a00f ]
Add and initialize descriptor data structures.
Signed-off-by: Jens Freimann <jfreimann@redhat.com>
Signed-off-by: Tiwei Bie <tiwei.bie@intel.com>
Reviewed-by: Maxime Coquelin <maxime.coquelin@redhat.com>
(cherry picked from commit f803734b0f2e6c556d9bf7fe8f11638429e3a00f)
Signed-off-by: Jens Freimann <jfreimann@redhat.com>
---
drivers/net/virtio/virtio_ethdev.c | 32 ++++++++++++++++++++----------
drivers/net/virtio/virtio_ring.h | 28 ++++++++++++++++++++++----
drivers/net/virtio/virtqueue.h | 2 +-
3 files changed, 46 insertions(+), 16 deletions(-)
diff --git a/drivers/net/virtio/virtio_ethdev.c b/drivers/net/virtio/virtio_ethdev.c
index 2ba66d291..ee52e3cdb 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
*/
@@ -382,11 +384,16 @@ 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);
@@ -489,7 +496,8 @@ 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
@@ -1486,7 +1494,8 @@ 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);
@@ -1906,7 +1915,8 @@ 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 464449074..1760823c6 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 c32812427..d08ef9112 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;
--
2.21.0
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