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Merge branch 'hns-fixes'

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Huazhong Tan says:

====================
net: hns: bug fixes & optimization for HNS driver

This patchset presents some bug fixes found out when CONFIG_ARM64_64K_PAGES
enable and an optimization for HNS driver.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2018-08-22 21:47:36 -07:00
commit 58ce660f91
2 changed files with 7 additions and 107 deletions
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6
drivers/net/ethernet/hisilicon/hns/hnae.h
View File

@ -220,10 +220,10 @@ struct hnae_desc_cb {
/* priv data for the desc, e.g. skb when use with ip stack*/
void *priv;
u16 page_offset;
u16 reuse_flag;
u32 page_offset;
u32 length; /* length of the buffer */
u16 length; /* length of the buffer */
u16 reuse_flag;
/* desc type, used by the ring user to mark the type of the priv data */
u16 type;

108
drivers/net/ethernet/hisilicon/hns/hns_enet.c
View File

@ -406,113 +406,13 @@ out_net_tx_busy:
return NETDEV_TX_BUSY;
}
/**
* hns_nic_get_headlen - determine size of header for RSC/LRO/GRO/FCOE
* @data: pointer to the start of the headers
* @max: total length of section to find headers in
*
* This function is meant to determine the length of headers that will
* be recognized by hardware for LRO, GRO, and RSC offloads. The main
* motivation of doing this is to only perform one pull for IPv4 TCP
* packets so that we can do basic things like calculating the gso_size
* based on the average data per packet.
**/
static unsigned int hns_nic_get_headlen(unsigned char *data, u32 flag,
unsigned int max_size)
{
unsigned char *network;
u8 hlen;
/* this should never happen, but better safe than sorry */
if (max_size < ETH_HLEN)
return max_size;
/* initialize network frame pointer */
network = data;
/* set first protocol and move network header forward */
network += ETH_HLEN;
/* handle any vlan tag if present */
if (hnae_get_field(flag, HNS_RXD_VLAN_M, HNS_RXD_VLAN_S)
== HNS_RX_FLAG_VLAN_PRESENT) {
if ((typeof(max_size))(network - data) > (max_size - VLAN_HLEN))
return max_size;
network += VLAN_HLEN;
}
/* handle L3 protocols */
if (hnae_get_field(flag, HNS_RXD_L3ID_M, HNS_RXD_L3ID_S)
== HNS_RX_FLAG_L3ID_IPV4) {
if ((typeof(max_size))(network - data) >
(max_size - sizeof(struct iphdr)))
return max_size;
/* access ihl as a u8 to avoid unaligned access on ia64 */
hlen = (network[0] & 0x0F) << 2;
/* verify hlen meets minimum size requirements */
if (hlen < sizeof(struct iphdr))
return network - data;
/* record next protocol if header is present */
} else if (hnae_get_field(flag, HNS_RXD_L3ID_M, HNS_RXD_L3ID_S)
== HNS_RX_FLAG_L3ID_IPV6) {
if ((typeof(max_size))(network - data) >
(max_size - sizeof(struct ipv6hdr)))
return max_size;
/* record next protocol */
hlen = sizeof(struct ipv6hdr);
} else {
return network - data;
}
/* relocate pointer to start of L4 header */
network += hlen;
/* finally sort out TCP/UDP */
if (hnae_get_field(flag, HNS_RXD_L4ID_M, HNS_RXD_L4ID_S)
== HNS_RX_FLAG_L4ID_TCP) {
if ((typeof(max_size))(network - data) >
(max_size - sizeof(struct tcphdr)))
return max_size;
/* access doff as a u8 to avoid unaligned access on ia64 */
hlen = (network[12] & 0xF0) >> 2;
/* verify hlen meets minimum size requirements */
if (hlen < sizeof(struct tcphdr))
return network - data;
network += hlen;
} else if (hnae_get_field(flag, HNS_RXD_L4ID_M, HNS_RXD_L4ID_S)
== HNS_RX_FLAG_L4ID_UDP) {
if ((typeof(max_size))(network - data) >
(max_size - sizeof(struct udphdr)))
return max_size;
network += sizeof(struct udphdr);
}
/* If everything has gone correctly network should be the
* data section of the packet and will be the end of the header.
* If not then it probably represents the end of the last recognized
* header.
*/
if ((typeof(max_size))(network - data) < max_size)
return network - data;
else
return max_size;
}
static void hns_nic_reuse_page(struct sk_buff *skb, int i,
struct hnae_ring *ring, int pull_len,
struct hnae_desc_cb *desc_cb)
{
struct hnae_desc *desc;
int truesize, size;
u32 truesize;
int size;
int last_offset;
bool twobufs;
@ -530,7 +430,7 @@ static void hns_nic_reuse_page(struct sk_buff *skb, int i,
}
skb_add_rx_frag(skb, i, desc_cb->priv, desc_cb->page_offset + pull_len,
size - pull_len, truesize - pull_len);
size - pull_len, truesize);
/* avoid re-using remote pages,flag default unreuse */
if (unlikely(page_to_nid(desc_cb->priv) != numa_node_id()))
@ -695,7 +595,7 @@ static int hns_nic_poll_rx_skb(struct hns_nic_ring_data *ring_data,
} else {
ring->stats.seg_pkt_cnt++;
pull_len = hns_nic_get_headlen(va, bnum_flag, HNS_RX_HEAD_SIZE);
pull_len = eth_get_headlen(va, HNS_RX_HEAD_SIZE);
memcpy(__skb_put(skb, pull_len), va,
ALIGN(pull_len, sizeof(long)));