| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-ID: <e85100822a4656332c8aa208a2e98af3df12e325.1572610156.git.irusskikh@marvell.com>
Date: Fri, 1 Nov 2019 12:17:27 +0000
From: Igor Russkikh <irusskikh@...vell.com>
To: "netdev@...r.kernel.org" <netdev@...r.kernel.org>
CC: "David S . Miller" <davem@...emloft.net>,
Igor Russkikh <irusskikh@...vell.com>
Subject: [PATCH net-next 11/12] net: atlantic: implement UDP GSO offload
atlantic hardware does support UDP hardware segmentation offload.
This allows user to specify one large contiguous buffer with data
which then will be split automagically into multiple UDP packets
of specified size.
Bulk sending of large UDP streams lowers CPU usage and increases
bandwidth.
We did estimations both with udpgso_bench_tx test tool and with modified
iperf3 measurement tool (4 streams, multithread, 200b packet size)
over AQC<->AQC 10G link. Flow control is disabled to prevent RX side
impact on measurements.
No UDP GSO:
iperf3 -c 10.0.1.2 -u -b0 -l 200 -P4 --multithread
UDP GSO:
iperf3 -c 10.0.1.2 -u -b0 -l 12600 --udp-lso 200 -P4 --multithread
Mode CPU iperf speed Line speed Packets per second
-------------------------------------------------------------
NO UDP GSO 350% 3.07 Gbps 3.8 Gbps 1,919,419
SW UDP GSO 200% 5.55 Gbps 6.4 Gbps 3,286,144
HW UDP GSO 90% 6.80 Gbps 8.4 Gbps 4,273,117
Signed-off-by: Igor Russkikh <irusskikh@...vell.com>
---
.../device_drivers/aquantia/atlantic.txt | 15 +++++++++++++++
drivers/net/ethernet/aquantia/atlantic/aq_nic.c | 16 +++++++++++++---
drivers/net/ethernet/aquantia/atlantic/aq_ring.h | 7 ++++---
.../aquantia/atlantic/hw_atl/hw_atl_a0.c | 2 +-
.../aquantia/atlantic/hw_atl/hw_atl_b0.c | 11 +++++++----
5 files changed, 40 insertions(+), 11 deletions(-)
diff --git a/Documentation/networking/device_drivers/aquantia/atlantic.txt b/Documentation/networking/device_drivers/aquantia/atlantic.txt
index ef3d8c749d4c..d614250e37d5 100644
--- a/Documentation/networking/device_drivers/aquantia/atlantic.txt
+++ b/Documentation/networking/device_drivers/aquantia/atlantic.txt
@@ -325,6 +325,21 @@ Supported ethtool options
Example:
ethtool -N eth0 flow-type udp4 action 0 loc 32
+ UDP GSO hardware offload
+ ---------------------------------
+ UDP GSO allows to boost UDP tx rates by offloading UDP headers allocation
+ into hardware. A special userspace socket option is required for this,
+ could be validated with /kernel/tools/testing/selftests/net/
+
+ udpgso_bench_tx -u -4 -D 10.0.1.1 -s 6300 -S 100
+
+ Will cause sending out of 100 byte sized UDP packets formed from single
+ 6300 bytes user buffer.
+
+ UDP GSO is configured by:
+
+ ethtool -K eth0 tx-udp-segmentation on
+
Private flags (testing)
---------------------------------
diff --git a/drivers/net/ethernet/aquantia/atlantic/aq_nic.c b/drivers/net/ethernet/aquantia/atlantic/aq_nic.c
index 7ad8eb535d28..742ee5fe003e 100644
--- a/drivers/net/ethernet/aquantia/atlantic/aq_nic.c
+++ b/drivers/net/ethernet/aquantia/atlantic/aq_nic.c
@@ -309,6 +309,7 @@ void aq_nic_ndev_init(struct aq_nic_s *self)
self->ndev->vlan_features |= NETIF_F_HW_CSUM | NETIF_F_RXCSUM |
NETIF_F_RXHASH | NETIF_F_SG |
NETIF_F_LRO | NETIF_F_TSO;
+ self->ndev->gso_partial_features = NETIF_F_GSO_UDP_L4;
self->ndev->priv_flags = aq_hw_caps->hw_priv_flags;
self->ndev->priv_flags |= IFF_LIVE_ADDR_CHANGE;
@@ -484,11 +485,19 @@ unsigned int aq_nic_map_skb(struct aq_nic_s *self, struct sk_buff *skb,
if (unlikely(skb_is_gso(skb))) {
dx_buff->mss = skb_shinfo(skb)->gso_size;
- dx_buff->is_gso = 1U;
+ if (ip_hdr(skb)->protocol == IPPROTO_TCP) {
+ dx_buff->is_gso_tcp = 1U;
+ dx_buff->len_l4 = tcp_hdrlen(skb);
+ } else if (ip_hdr(skb)->protocol == IPPROTO_UDP) {
+ dx_buff->is_gso_udp = 1U;
+ dx_buff->len_l4 = sizeof(struct udphdr);
+ /* UDP GSO Hardware does not replace packet length. */
+ udp_hdr(skb)->len = htons(dx_buff->mss +
+ dx_buff->len_l4);
+ }
dx_buff->len_pkt = skb->len;
dx_buff->len_l2 = ETH_HLEN;
dx_buff->len_l3 = ip_hdrlen(skb);
- dx_buff->len_l4 = tcp_hdrlen(skb);
dx_buff->eop_index = 0xffffU;
dx_buff->is_ipv6 =
(ip_hdr(skb)->version == 6) ? 1U : 0U;
@@ -597,7 +606,8 @@ unsigned int aq_nic_map_skb(struct aq_nic_s *self, struct sk_buff *skb,
--ret, dx = aq_ring_next_dx(ring, dx)) {
dx_buff = &ring->buff_ring[dx];
- if (!dx_buff->is_gso && !dx_buff->is_vlan && dx_buff->pa) {
+ if (!(dx_buff->is_gso_tcp | dx_buff->is_gso_udp) &&
+ !dx_buff->is_vlan && dx_buff->pa) {
if (unlikely(dx_buff->is_sop)) {
dma_unmap_single(aq_nic_get_dev(self),
dx_buff->pa,
diff --git a/drivers/net/ethernet/aquantia/atlantic/aq_ring.h b/drivers/net/ethernet/aquantia/atlantic/aq_ring.h
index be3702a4dcc9..991e4d31b094 100644
--- a/drivers/net/ethernet/aquantia/atlantic/aq_ring.h
+++ b/drivers/net/ethernet/aquantia/atlantic/aq_ring.h
@@ -65,19 +65,20 @@ struct __packed aq_ring_buff_s {
};
union {
struct {
- u16 len;
+ u32 len:16;
u32 is_ip_cso:1;
u32 is_udp_cso:1;
u32 is_tcp_cso:1;
u32 is_cso_err:1;
u32 is_sop:1;
u32 is_eop:1;
- u32 is_gso:1;
+ u32 is_gso_tcp:1;
+ u32 is_gso_udp:1;
u32 is_mapped:1;
u32 is_cleaned:1;
u32 is_error:1;
u32 is_vlan:1;
- u32 rsvd3:5;
+ u32 rsvd3:4;
u16 eop_index;
u16 rsvd4;
};
diff --git a/drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_a0.c b/drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_a0.c
index 03b62d7d9f1a..9b1062b8af64 100644
--- a/drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_a0.c
+++ b/drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_a0.c
@@ -454,7 +454,7 @@ static int hw_atl_a0_hw_ring_tx_xmit(struct aq_hw_s *self,
buff = &ring->buff_ring[ring->sw_tail];
- if (buff->is_gso) {
+ if (buff->is_gso_tcp) {
txd->ctl |= (buff->len_l3 << 31) |
(buff->len_l2 << 24) |
HW_ATL_A0_TXD_CTL_CMD_TCP |
diff --git a/drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_b0.c b/drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_b0.c
index e4de258a5c19..2a8f84064701 100644
--- a/drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_b0.c
+++ b/drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_b0.c
@@ -43,7 +43,9 @@
NETIF_F_NTUPLE | \
NETIF_F_HW_VLAN_CTAG_FILTER | \
NETIF_F_HW_VLAN_CTAG_RX | \
- NETIF_F_HW_VLAN_CTAG_TX, \
+ NETIF_F_HW_VLAN_CTAG_TX | \
+ NETIF_F_GSO_UDP_L4 | \
+ NETIF_F_GSO_PARTIAL, \
.hw_priv_flags = IFF_UNICAST_FLT, \
.flow_control = true, \
.mtu = HW_ATL_B0_MTU_JUMBO, \
@@ -531,8 +533,9 @@ static int hw_atl_b0_hw_ring_tx_xmit(struct aq_hw_s *self,
buff = &ring->buff_ring[ring->sw_tail];
- if (buff->is_gso) {
- txd->ctl |= HW_ATL_B0_TXD_CTL_CMD_TCP;
+ if (buff->is_gso_tcp || buff->is_gso_udp) {
+ if (buff->is_gso_tcp)
+ txd->ctl |= HW_ATL_B0_TXD_CTL_CMD_TCP;
txd->ctl |= HW_ATL_B0_TXD_CTL_DESC_TYPE_TXC;
txd->ctl |= (buff->len_l3 << 31) |
(buff->len_l2 << 24);
@@ -552,7 +555,7 @@ static int hw_atl_b0_hw_ring_tx_xmit(struct aq_hw_s *self,
txd->ctl |= buff->vlan_tx_tag << 4;
is_vlan = true;
}
- if (!buff->is_gso && !buff->is_vlan) {
+ if (!buff->is_gso_tcp && !buff->is_gso_udp && !buff->is_vlan) {
buff_pa_len = buff->len;
txd->buf_addr = buff->pa;
--
2.17.1
Powered by blists - more mailing lists