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Message-Id: <20220222120054.400208-4-andrew@daynix.com>
Date: Tue, 22 Feb 2022 14:00:53 +0200
From: Andrew Melnychenko <andrew@...nix.com>
To: netdev@...r.kernel.org, virtualization@...ts.linux-foundation.org,
linux-kernel@...r.kernel.org, davem@...emloft.net, kuba@...nel.org,
jasowang@...hat.com, mst@...hat.com
Cc: yan@...nix.com, yuri.benditovich@...nix.com
Subject: [PATCH v4 3/4] drivers/net/virtio_net: Added RSS hash report.
Added features for RSS hash report.
If hash is provided - it sets to skb.
Added checks if rss and/or hash are enabled together.
Signed-off-by: Andrew Melnychenko <andrew@...nix.com>
---
drivers/net/virtio_net.c | 55 +++++++++++++++++++++++++++++++++++-----
1 file changed, 49 insertions(+), 6 deletions(-)
diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c
index b5f2bb426a7b..8b317b3ef5aa 100644
--- a/drivers/net/virtio_net.c
+++ b/drivers/net/virtio_net.c
@@ -227,6 +227,7 @@ struct virtnet_info {
/* Host supports rss and/or hash report */
bool has_rss;
+ bool has_rss_hash_report;
u8 rss_key_size;
u16 rss_indir_table_size;
u32 rss_hash_types_supported;
@@ -1148,6 +1149,35 @@ static struct sk_buff *receive_mergeable(struct net_device *dev,
return NULL;
}
+static void virtio_skb_set_hash(const struct virtio_net_hdr_v1_hash *hdr_hash,
+ struct sk_buff *skb)
+{
+ enum pkt_hash_types rss_hash_type;
+
+ if (!hdr_hash || !skb)
+ return;
+
+ switch (hdr_hash->hash_report) {
+ case VIRTIO_NET_HASH_REPORT_TCPv4:
+ case VIRTIO_NET_HASH_REPORT_UDPv4:
+ case VIRTIO_NET_HASH_REPORT_TCPv6:
+ case VIRTIO_NET_HASH_REPORT_UDPv6:
+ case VIRTIO_NET_HASH_REPORT_TCPv6_EX:
+ case VIRTIO_NET_HASH_REPORT_UDPv6_EX:
+ rss_hash_type = PKT_HASH_TYPE_L4;
+ break;
+ case VIRTIO_NET_HASH_REPORT_IPv4:
+ case VIRTIO_NET_HASH_REPORT_IPv6:
+ case VIRTIO_NET_HASH_REPORT_IPv6_EX:
+ rss_hash_type = PKT_HASH_TYPE_L3;
+ break;
+ case VIRTIO_NET_HASH_REPORT_NONE:
+ default:
+ rss_hash_type = PKT_HASH_TYPE_NONE;
+ }
+ skb_set_hash(skb, hdr_hash->hash_value, rss_hash_type);
+}
+
static void receive_buf(struct virtnet_info *vi, struct receive_queue *rq,
void *buf, unsigned int len, void **ctx,
unsigned int *xdp_xmit,
@@ -1182,6 +1212,8 @@ static void receive_buf(struct virtnet_info *vi, struct receive_queue *rq,
return;
hdr = skb_vnet_hdr(skb);
+ if (dev->features & NETIF_F_RXHASH && vi->has_rss_hash_report)
+ virtio_skb_set_hash((const struct virtio_net_hdr_v1_hash *)hdr, skb);
if (hdr->hdr.flags & VIRTIO_NET_HDR_F_DATA_VALID)
skb->ip_summed = CHECKSUM_UNNECESSARY;
@@ -2232,7 +2264,8 @@ static bool virtnet_commit_rss_command(struct virtnet_info *vi)
sg_set_buf(&sgs[3], vi->ctrl->rss.key, sg_buf_size);
if (!virtnet_send_command(vi, VIRTIO_NET_CTRL_MQ,
- VIRTIO_NET_CTRL_MQ_RSS_CONFIG, sgs)) {
+ vi->has_rss ? VIRTIO_NET_CTRL_MQ_RSS_CONFIG
+ : VIRTIO_NET_CTRL_MQ_HASH_CONFIG, sgs)) {
dev_warn(&dev->dev, "VIRTIONET issue with committing RSS sgs\n");
return false;
}
@@ -3231,6 +3264,8 @@ static bool virtnet_validate_features(struct virtio_device *vdev)
VIRTNET_FAIL_ON(vdev, VIRTIO_NET_F_CTRL_MAC_ADDR,
"VIRTIO_NET_F_CTRL_VQ") ||
VIRTNET_FAIL_ON(vdev, VIRTIO_NET_F_RSS,
+ "VIRTIO_NET_F_CTRL_VQ") ||
+ VIRTNET_FAIL_ON(vdev, VIRTIO_NET_F_HASH_REPORT,
"VIRTIO_NET_F_CTRL_VQ"))) {
return false;
}
@@ -3366,8 +3401,13 @@ static int virtnet_probe(struct virtio_device *vdev)
if (virtio_has_feature(vdev, VIRTIO_NET_F_MRG_RXBUF))
vi->mergeable_rx_bufs = true;
- if (virtio_has_feature(vdev, VIRTIO_NET_F_RSS)) {
+ if (virtio_has_feature(vdev, VIRTIO_NET_F_HASH_REPORT))
+ vi->has_rss_hash_report = true;
+
+ if (virtio_has_feature(vdev, VIRTIO_NET_F_RSS))
vi->has_rss = true;
+
+ if (vi->has_rss || vi->has_rss_hash_report) {
vi->rss_indir_table_size =
virtio_cread16(vdev, offsetof(struct virtio_net_config,
rss_max_indirection_table_length));
@@ -3383,8 +3423,11 @@ static int virtnet_probe(struct virtio_device *vdev)
dev->hw_features |= NETIF_F_RXHASH;
}
- if (virtio_has_feature(vdev, VIRTIO_NET_F_MRG_RXBUF) ||
- virtio_has_feature(vdev, VIRTIO_F_VERSION_1))
+
+ if (vi->has_rss_hash_report)
+ vi->hdr_len = sizeof(struct virtio_net_hdr_v1_hash);
+ else if (virtio_has_feature(vdev, VIRTIO_NET_F_MRG_RXBUF) ||
+ virtio_has_feature(vdev, VIRTIO_F_VERSION_1))
vi->hdr_len = sizeof(struct virtio_net_hdr_mrg_rxbuf);
else
vi->hdr_len = sizeof(struct virtio_net_hdr);
@@ -3451,7 +3494,7 @@ static int virtnet_probe(struct virtio_device *vdev)
}
}
- if (vi->has_rss)
+ if (vi->has_rss || vi->has_rss_hash_report)
virtnet_init_default_rss(vi);
err = register_netdev(dev);
@@ -3586,7 +3629,7 @@ static struct virtio_device_id id_table[] = {
VIRTIO_NET_F_CTRL_MAC_ADDR, \
VIRTIO_NET_F_MTU, VIRTIO_NET_F_CTRL_GUEST_OFFLOADS, \
VIRTIO_NET_F_SPEED_DUPLEX, VIRTIO_NET_F_STANDBY, \
- VIRTIO_NET_F_RSS
+ VIRTIO_NET_F_RSS, VIRTIO_NET_F_HASH_REPORT
static unsigned int features[] = {
VIRTNET_FEATURES,
--
2.34.1
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