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Date: Thu, 30 Mar 2017 16:30:51 +0100
From: Salil Mehta <salil.mehta@...wei.com>
To: <davem@...emloft.net>
CC: <salil.mehta@...wei.com>, <yisen.zhuang@...wei.com>,
<mehta.salil.lnk@...il.com>, <netdev@...r.kernel.org>,
<linux-kernel@...r.kernel.org>, <linuxarm@...wei.com>,
lipeng <lipeng321@...wei.com>,
Weiwei Deng <dengweiwei@...wei.com>
Subject: [PATCH net 04/19] net: hns: Change the TX queue selection algorithm
From: lipeng <lipeng321@...wei.com>
This patch changes the TX queue selection algorithm from default
to based on tuple {sport,dport,sip,dip}/indirection table
similar to used during RX with Receive Side Scaling.
Signed-off-by: lipeng <lipeng321@...wei.com>
Signed-off-by: Weiwei Deng <dengweiwei@...wei.com>
Reviewed-by: Yisen Zhuang <yisen.zhuang@...wei.com>
Signed-off-by: Salil Mehta <salil.mehta@...wei.com>
---
drivers/net/ethernet/hisilicon/hns/hnae.h | 2 +
drivers/net/ethernet/hisilicon/hns/hns_ae_adapt.c | 5 ++
drivers/net/ethernet/hisilicon/hns/hns_enet.c | 63 +++++++++++++++++++++++
3 files changed, 70 insertions(+)
diff --git a/drivers/net/ethernet/hisilicon/hns/hnae.h b/drivers/net/ethernet/hisilicon/hns/hnae.h
index 8016854..85df7c7 100644
--- a/drivers/net/ethernet/hisilicon/hns/hnae.h
+++ b/drivers/net/ethernet/hisilicon/hns/hnae.h
@@ -545,6 +545,8 @@ struct hnae_handle {
int vf_id;
u32 eport_id;
u32 dport_id; /* v2 tx bd should fill the dport_id */
+ u32 *rss_key;
+ u32 *rss_indir_table;
enum hnae_port_type port_type;
enum hnae_media_type media_type;
struct list_head node; /* list to hnae_ae_dev->handle_list */
diff --git a/drivers/net/ethernet/hisilicon/hns/hns_ae_adapt.c b/drivers/net/ethernet/hisilicon/hns/hns_ae_adapt.c
index 0a9cdf0..abafa25 100644
--- a/drivers/net/ethernet/hisilicon/hns/hns_ae_adapt.c
+++ b/drivers/net/ethernet/hisilicon/hns/hns_ae_adapt.c
@@ -80,6 +80,7 @@ struct hnae_handle *hns_ae_get_handle(struct hnae_ae_dev *dev,
struct hnae_handle *ae_handle;
struct ring_pair_cb *ring_pair_cb;
struct hnae_vf_cb *vf_cb;
+ struct hns_ppe_cb *ppe_cb;
dsaf_dev = hns_ae_get_dsaf_dev(dev);
@@ -127,11 +128,15 @@ struct hnae_handle *hns_ae_get_handle(struct hnae_ae_dev *dev,
vf_cb->port_index = port_id;
vf_cb->mac_cb = dsaf_dev->mac_cb[port_id];
+ ppe_cb = hns_get_ppe_cb(ae_handle);
+
ae_handle->phy_if = vf_cb->mac_cb->phy_if;
ae_handle->phy_dev = vf_cb->mac_cb->phy_dev;
ae_handle->if_support = vf_cb->mac_cb->if_support;
ae_handle->port_type = vf_cb->mac_cb->mac_type;
ae_handle->media_type = vf_cb->mac_cb->media_type;
+ ae_handle->rss_key = ppe_cb->rss_key;
+ ae_handle->rss_indir_table = ppe_cb->rss_indir_table;
ae_handle->dport_id = port_id;
return ae_handle;
diff --git a/drivers/net/ethernet/hisilicon/hns/hns_enet.c b/drivers/net/ethernet/hisilicon/hns/hns_enet.c
index 73ec8c8..646f601 100644
--- a/drivers/net/ethernet/hisilicon/hns/hns_enet.c
+++ b/drivers/net/ethernet/hisilicon/hns/hns_enet.c
@@ -40,6 +40,8 @@
#define SKB_TMP_LEN(SKB) \
(((SKB)->transport_header - (SKB)->mac_header) + tcp_hdrlen(SKB))
+#define INVALID_TX_RING 0xffff
+
static void fill_v2_desc(struct hnae_ring *ring, void *priv,
int size, dma_addr_t dma, int frag_end,
int buf_num, enum hns_desc_type type, int mtu)
@@ -1657,17 +1659,78 @@ static void hns_nic_get_stats64(struct net_device *ndev,
stats->tx_compressed = ndev->stats.tx_compressed;
}
+static u32 hns_calc_tx_rss(u32 sip, u32 dip, u32 sport, u32 dport, u32 *rss_key)
+{
+ u32 rss = 0;
+ int i;
+ u32 port;
+
+ port = (sport << 16) | dport;
+
+ for (i = 0; i < 32; i++)
+ if (sip & (1 << (31 - i)))
+ rss ^= (rss_key[9] << i) |
+ (u32)((u64)rss_key[8] >> (32 - i));
+
+ for (i = 0; i < 32; i++)
+ if (dip & (1 << (31 - i)))
+ rss ^= (rss_key[8] << i) |
+ (u32)((u64)rss_key[7] >> (32 - i));
+
+ for (i = 0; i < 32; i++)
+ if (port & (1 << (31 - i)))
+ rss ^= (rss_key[7] << i) |
+ (u32)((u64)rss_key[6] >> (32 - i));
+
+ return rss;
+}
+
+/* if tcp or udp, then calc tx ring index */
+static u16 hns_calc_tx_ring_idx(struct hns_nic_priv *priv,
+ struct sk_buff *skb)
+{
+ struct hnae_handle *handle;
+ struct iphdr *iphdr;
+ struct tcphdr *tcphdr;
+ u32 rss;
+ int protocol;
+ u16 ring = INVALID_TX_RING;
+
+ if (skb->protocol == htons(ETH_P_IP)) {
+ iphdr = ip_hdr(skb);
+ protocol = iphdr->protocol;
+ if (protocol == IPPROTO_TCP) {
+ /* because tcp and udp dest and src port is same */
+ tcphdr = tcp_hdr(skb);
+ handle = priv->ae_handle;
+ rss = hns_calc_tx_rss(ntohl(iphdr->daddr),
+ ntohl(iphdr->saddr),
+ ntohs(tcphdr->dest),
+ ntohs(tcphdr->source),
+ handle->rss_key);
+ ring = handle->rss_indir_table[rss & 0xff] & 0xf;
+ }
+ }
+
+ return ring;
+}
+
static u16
hns_nic_select_queue(struct net_device *ndev, struct sk_buff *skb,
void *accel_priv, select_queue_fallback_t fallback)
{
struct ethhdr *eth_hdr = (struct ethhdr *)skb->data;
struct hns_nic_priv *priv = netdev_priv(ndev);
+ u16 ring;
/* fix hardware broadcast/multicast packets queue loopback */
if (!AE_IS_VER1(priv->enet_ver) &&
is_multicast_ether_addr(eth_hdr->h_dest))
return 0;
+
+ ring = hns_calc_tx_ring_idx(priv, skb);
+ if (ring != INVALID_TX_RING)
+ return ring;
else
return fallback(ndev, skb);
}
--
2.7.4
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