AuxXxilium/linux_dsm_epyc7002
1
0
Fork 0
mirror of https://github.com/AuxXxilium/linux_dsm_epyc7002.git synced 2024-12-18 22:56:45 +07:00
Code Issues Actions Packages Projects Releases Wiki Activity

Merge branch 'sunvnet-next'

Browse Source 
David L Stevens says:

====================
sunvnet: add SG, HW_CSUM, GSO, and TSO support

This patch set adds everything needed for TSO support in sunvnet. On my
test hardware, this increases the single-stream TCP throughput for the
default 1500-byte MTU Linux-Linux from ~2Gbps to 10Gbps and Linux-Solaris
from ~2Gbps to 6Gbps.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David S. Miller 2014-12-08 21:19:13 -05:00
commit f5f04bcf53
3 changed files with 388 additions and 46 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

19
arch/sparc/include/asm/vio.h
View File

@ -247,6 +247,25 @@ struct vio_net_desc {
struct ldc_trans_cookie cookies[0];
};
struct vio_net_dext {
u8 flags;
#define VNET_PKT_HASH 0x01
#define VNET_PKT_HCK_IPV4_HDRCKSUM 0x02
#define VNET_PKT_HCK_FULLCKSUM 0x04
#define VNET_PKT_IPV4_LSO 0x08
#define VNET_PKT_HCK_IPV4_HDRCKSUM_OK 0x10
#define VNET_PKT_HCK_FULLCKSUM_OK 0x20
u8 vnet_hashval;
u16 ipv4_lso_mss;
u32 resv3;
};
static inline struct vio_net_dext *vio_net_ext(struct vio_net_desc *desc)
{
return (struct vio_net_dext *)&desc->cookies[2];
}
#define VIO_MAX_RING_COOKIES 24
struct vio_dring_state {

406
drivers/net/ethernet/sun/sunvnet.c
View File

@ -15,12 +15,14 @@
#include <linux/ethtool.h>
#include <linux/etherdevice.h>
#include <linux/mutex.h>
#include <linux/highmem.h>
#include <linux/if_vlan.h>
#if IS_ENABLED(CONFIG_IPV6)
#include <linux/icmpv6.h>
#endif
#include <net/ip.h>
#include <net/icmp.h>
#include <net/route.h>
@ -51,6 +53,8 @@ static int __vnet_tx_trigger(struct vnet_port *port, u32 start);
/* Ordered from largest major to lowest */
static struct vio_version vnet_versions[] = {
{ .major = 1, .minor = 8 },
{ .major = 1, .minor = 7 },
{ .major = 1, .minor = 6 },
{ .major = 1, .minor = 0 },
};
@ -73,13 +77,19 @@ static int vnet_handle_unknown(struct vnet_port *port, void *arg)
return -ECONNRESET;
}
static int vnet_port_alloc_tx_ring(struct vnet_port *port);
static int vnet_send_attr(struct vio_driver_state *vio)
{
struct vnet_port *port = to_vnet_port(vio);
struct net_device *dev = port->vp->dev;
struct vio_net_attr_info pkt;
int framelen = ETH_FRAME_LEN;
int i;
int i, err;
err = vnet_port_alloc_tx_ring(to_vnet_port(vio));
if (err)
return err;
memset(&pkt, 0, sizeof(pkt));
pkt.tag.type = VIO_TYPE_CTRL;
@ -110,8 +120,15 @@ static int vnet_send_attr(struct vio_driver_state *vio)
pkt.mtu = framelen + VLAN_HLEN;
}
pkt.plnk_updt = PHYSLINK_UPDATE_NONE;
pkt.cflags = 0;
if (vio_version_after_eq(vio, 1, 7) && port->tso) {
pkt.cflags |= VNET_LSO_IPV4_CAPAB;
if (!port->tsolen)
port->tsolen = VNET_MAXTSO;
pkt.ipv4_lso_maxlen = port->tsolen;
}
pkt.plnk_updt = PHYSLINK_UPDATE_NONE;
viodbg(HS, "SEND NET ATTR xmode[0x%x] atype[0x%x] addr[%llx] "
"ackfreq[%u] plnk_updt[0x%02x] opts[0x%02x] mtu[%llu] "
@ -165,6 +182,26 @@ static int handle_attr_info(struct vio_driver_state *vio,
}
port->rmtu = localmtu;
/* LSO negotiation */
if (vio_version_after_eq(vio, 1, 7))
port->tso &= !!(pkt->cflags & VNET_LSO_IPV4_CAPAB);
else
port->tso = false;
if (port->tso) {
if (!port->tsolen)
port->tsolen = VNET_MAXTSO;
port->tsolen = min(port->tsolen, pkt->ipv4_lso_maxlen);
if (port->tsolen < VNET_MINTSO) {
port->tso = false;
port->tsolen = 0;
pkt->cflags &= ~VNET_LSO_IPV4_CAPAB;
}
pkt->ipv4_lso_maxlen = port->tsolen;
} else {
pkt->cflags &= ~VNET_LSO_IPV4_CAPAB;
pkt->ipv4_lso_maxlen = 0;
}
/* for version >= 1.6, ACK packet mode we support */
if (vio_version_after_eq(vio, 1, 6)) {
pkt->xfer_mode = VIO_NEW_DRING_MODE;
@ -276,10 +313,42 @@ static struct sk_buff *alloc_and_align_skb(struct net_device *dev,
return skb;
}
static int vnet_rx_one(struct vnet_port *port, unsigned int len,
struct ldc_trans_cookie *cookies, int ncookies)
static inline void vnet_fullcsum(struct sk_buff *skb)
{
struct iphdr *iph = ip_hdr(skb);
int offset = skb_transport_offset(skb);
if (skb->protocol != htons(ETH_P_IP))
return;
if (iph->protocol != IPPROTO_TCP &&
iph->protocol != IPPROTO_UDP)
return;
skb->ip_summed = CHECKSUM_NONE;
skb->csum_level = 1;
skb->csum = 0;
if (iph->protocol == IPPROTO_TCP) {
struct tcphdr *ptcp = tcp_hdr(skb);
ptcp->check = 0;
skb->csum = skb_checksum(skb, offset, skb->len - offset, 0);
ptcp->check = csum_tcpudp_magic(iph->saddr, iph->daddr,
skb->len - offset, IPPROTO_TCP,
skb->csum);
} else if (iph->protocol == IPPROTO_UDP) {
struct udphdr *pudp = udp_hdr(skb);
pudp->check = 0;
skb->csum = skb_checksum(skb, offset, skb->len - offset, 0);
pudp->check = csum_tcpudp_magic(iph->saddr, iph->daddr,
skb->len - offset, IPPROTO_UDP,
skb->csum);
}
}
static int vnet_rx_one(struct vnet_port *port, struct vio_net_desc *desc)
{
struct net_device *dev = port->vp->dev;
unsigned int len = desc->size;
unsigned int copy_len;
struct sk_buff *skb;
int err;
@ -301,7 +370,7 @@ static int vnet_rx_one(struct vnet_port *port, unsigned int len,
skb_put(skb, copy_len);
err = ldc_copy(port->vio.lp, LDC_COPY_IN,
skb->data, copy_len, 0,
cookies, ncookies);
desc->cookies, desc->ncookies);
if (unlikely(err < 0)) {
dev->stats.rx_frame_errors++;
goto out_free_skb;
@ -311,6 +380,30 @@ static int vnet_rx_one(struct vnet_port *port, unsigned int len,
skb_trim(skb, len);
skb->protocol = eth_type_trans(skb, dev);
if (vio_version_after_eq(&port->vio, 1, 8)) {
struct vio_net_dext *dext = vio_net_ext(desc);
if (dext->flags & VNET_PKT_HCK_IPV4_HDRCKSUM) {
if (skb->protocol == ETH_P_IP) {
struct iphdr *iph = (struct iphdr *)skb->data;
iph->check = 0;
ip_send_check(iph);
}
}
if ((dext->flags & VNET_PKT_HCK_FULLCKSUM) &&
skb->ip_summed == CHECKSUM_NONE)
vnet_fullcsum(skb);
if (dext->flags & VNET_PKT_HCK_IPV4_HDRCKSUM_OK) {
skb->ip_summed = CHECKSUM_PARTIAL;
skb->csum_level = 0;
if (dext->flags & VNET_PKT_HCK_FULLCKSUM_OK)
skb->csum_level = 1;
}
}
skb->ip_summed = port->switch_port ? CHECKSUM_NONE : CHECKSUM_PARTIAL;
dev->stats.rx_packets++;
dev->stats.rx_bytes += len;
napi_gro_receive(&port->napi, skb);
@ -445,7 +538,7 @@ static int vnet_walk_rx_one(struct vnet_port *port,
desc->cookies[0].cookie_addr,
desc->cookies[0].cookie_size);
err = vnet_rx_one(port, desc->size, desc->cookies, desc->ncookies);
err = vnet_rx_one(port, desc);
if (err == -ECONNRESET)
return err;
desc->hdr.state = VIO_DESC_DONE;
@ -655,6 +748,8 @@ static int vnet_event_napi(struct vnet_port *port, int budget)
if (event == LDC_EVENT_RESET) {
port->rmtu = 0;
port->tso = true;
port->tsolen = 0;
vio_port_up(vio);
}
port->rx_event = 0;
@ -915,11 +1010,54 @@ static void vnet_clean_timer_expire(unsigned long port0)
del_timer(&port->clean_timer);
}
static inline struct sk_buff *vnet_skb_shape(struct sk_buff *skb, void **pstart,
int *plen)
static inline int vnet_skb_map(struct ldc_channel *lp, struct sk_buff *skb,
struct ldc_trans_cookie *cookies, int ncookies,
unsigned int map_perm)
{
int i, nc, err, blen;
/* header */
blen = skb_headlen(skb);
if (blen < ETH_ZLEN)
blen = ETH_ZLEN;
blen += VNET_PACKET_SKIP;
blen += 8 - (blen & 7);
err = ldc_map_single(lp, skb->data-VNET_PACKET_SKIP, blen, cookies,
ncookies, map_perm);
if (err < 0)
return err;
nc = err;
for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
skb_frag_t *f = &skb_shinfo(skb)->frags[i];
u8 *vaddr;
if (nc < ncookies) {
vaddr = kmap_atomic(skb_frag_page(f));
blen = skb_frag_size(f);
blen += 8 - (blen & 7);
err = ldc_map_single(lp, vaddr + f->page_offset,
blen, cookies + nc, ncookies - nc,
map_perm);
kunmap_atomic(vaddr);
} else {
err = -EMSGSIZE;
}
if (err < 0) {
ldc_unmap(lp, cookies, nc);
return err;
}
nc += err;
}
return nc;
}
static inline struct sk_buff *vnet_skb_shape(struct sk_buff *skb, int ncookies)
{
struct sk_buff *nskb;
int len, pad;
int i, len, pad, docopy;
len = skb->len;
pad = 0;
@ -929,25 +1067,77 @@ static inline struct sk_buff *vnet_skb_shape(struct sk_buff *skb, void **pstart,
}
len += VNET_PACKET_SKIP;
pad += 8 - (len & 7);
len += 8 - (len & 7);
/* make sure we have enough cookies and alignment in every frag */
docopy = skb_shinfo(skb)->nr_frags >= ncookies;
for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
skb_frag_t *f = &skb_shinfo(skb)->frags[i];
docopy |= f->page_offset & 7;
}
if (((unsigned long)skb->data & 7) != VNET_PACKET_SKIP ||
skb_tailroom(skb) < pad ||
skb_headroom(skb) < VNET_PACKET_SKIP) {
nskb = alloc_and_align_skb(skb->dev, skb->len);
skb_headroom(skb) < VNET_PACKET_SKIP || docopy) {
int start = 0, offset;
__wsum csum;
len = skb->len > ETH_ZLEN ? skb->len : ETH_ZLEN;
nskb = alloc_and_align_skb(skb->dev, len);
if (nskb == NULL) {
dev_kfree_skb(skb);
return NULL;
}
skb_reserve(nskb, VNET_PACKET_SKIP);
if (skb_copy_bits(skb, 0, nskb->data, skb->len)) {
nskb->protocol = skb->protocol;
offset = skb_mac_header(skb) - skb->data;
skb_set_mac_header(nskb, offset);
offset = skb_network_header(skb) - skb->data;
skb_set_network_header(nskb, offset);
offset = skb_transport_header(skb) - skb->data;
skb_set_transport_header(nskb, offset);
offset = 0;
nskb->csum_offset = skb->csum_offset;
nskb->ip_summed = skb->ip_summed;
if (skb->ip_summed == CHECKSUM_PARTIAL)
start = skb_checksum_start_offset(skb);
if (start) {
struct iphdr *iph = ip_hdr(nskb);
int offset = start + nskb->csum_offset;
if (skb_copy_bits(skb, 0, nskb->data, start)) {
dev_kfree_skb(nskb);
dev_kfree_skb(skb);
return NULL;
}
*(__sum16 *)(skb->data + offset) = 0;
csum = skb_copy_and_csum_bits(skb, start,
nskb->data + start,
skb->len - start, 0);
if (iph->protocol == IPPROTO_TCP ||
iph->protocol == IPPROTO_UDP) {
csum = csum_tcpudp_magic(iph->saddr, iph->daddr,
skb->len - start,
iph->protocol, csum);
}
*(__sum16 *)(nskb->data + offset) = csum;
nskb->ip_summed = CHECKSUM_NONE;
} else if (skb_copy_bits(skb, 0, nskb->data, skb->len)) {
dev_kfree_skb(nskb);
dev_kfree_skb(skb);
return NULL;
}
(void)skb_put(nskb, skb->len);
if (skb_is_gso(skb)) {
skb_shinfo(nskb)->gso_size = skb_shinfo(skb)->gso_size;
skb_shinfo(nskb)->gso_type = skb_shinfo(skb)->gso_type;
}
dev_kfree_skb(skb);
skb = nskb;
}
*pstart = skb->data - VNET_PACKET_SKIP;
*plen = len;
return skb;
}
@ -963,6 +1153,111 @@ vnet_select_queue(struct net_device *dev, struct sk_buff *skb,
return port->q_index;
}
static int vnet_start_xmit(struct sk_buff *skb, struct net_device *dev);
static int vnet_handle_offloads(struct vnet_port *port, struct sk_buff *skb)
{
struct net_device *dev = port->vp->dev;
struct vio_dring_state *dr = &port->vio.drings[VIO_DRIVER_TX_RING];
struct sk_buff *segs;
int maclen, datalen;
int status;
int gso_size, gso_type, gso_segs;
int hlen = skb_transport_header(skb) - skb_mac_header(skb);
int proto = IPPROTO_IP;
if (skb->protocol == htons(ETH_P_IP))
proto = ip_hdr(skb)->protocol;
else if (skb->protocol == htons(ETH_P_IPV6))
proto = ipv6_hdr(skb)->nexthdr;
if (proto == IPPROTO_TCP)
hlen += tcp_hdr(skb)->doff * 4;
else if (proto == IPPROTO_UDP)
hlen += sizeof(struct udphdr);
else {
pr_err("vnet_handle_offloads GSO with unknown transport "
"protocol %d tproto %d\n", skb->protocol, proto);
hlen = 128; /* XXX */
}
datalen = port->tsolen - hlen;
gso_size = skb_shinfo(skb)->gso_size;
gso_type = skb_shinfo(skb)->gso_type;
gso_segs = skb_shinfo(skb)->gso_segs;
if (port->tso && gso_size < datalen)
gso_segs = DIV_ROUND_UP(skb->len - hlen, datalen);
if (unlikely(vnet_tx_dring_avail(dr) < gso_segs)) {
struct netdev_queue *txq;
txq = netdev_get_tx_queue(dev, port->q_index);
netif_tx_stop_queue(txq);
if (vnet_tx_dring_avail(dr) < skb_shinfo(skb)->gso_segs)
return NETDEV_TX_BUSY;
netif_tx_wake_queue(txq);
}
maclen = skb_network_header(skb) - skb_mac_header(skb);
skb_pull(skb, maclen);
if (port->tso && gso_size < datalen) {
/* segment to TSO size */
skb_shinfo(skb)->gso_size = datalen;
skb_shinfo(skb)->gso_segs = gso_segs;
segs = skb_gso_segment(skb, dev->features & ~NETIF_F_TSO);
/* restore gso_size & gso_segs */
skb_shinfo(skb)->gso_size = gso_size;
skb_shinfo(skb)->gso_segs = DIV_ROUND_UP(skb->len - hlen,
gso_size);
} else
segs = skb_gso_segment(skb, dev->features & ~NETIF_F_TSO);
if (IS_ERR(segs)) {
dev->stats.tx_dropped++;
return NETDEV_TX_OK;
}
skb_push(skb, maclen);
skb_reset_mac_header(skb);
status = 0;
while (segs) {
struct sk_buff *curr = segs;
segs = segs->next;
curr->next = NULL;
if (port->tso && curr->len > dev->mtu) {
skb_shinfo(curr)->gso_size = gso_size;
skb_shinfo(curr)->gso_type = gso_type;
skb_shinfo(curr)->gso_segs =
DIV_ROUND_UP(curr->len - hlen, gso_size);
} else
skb_shinfo(curr)->gso_size = 0;
skb_push(curr, maclen);
skb_reset_mac_header(curr);
memcpy(skb_mac_header(curr), skb_mac_header(skb),
maclen);
curr->csum_start = skb_transport_header(curr) - curr->head;
if (ip_hdr(curr)->protocol == IPPROTO_TCP)
curr->csum_offset = offsetof(struct tcphdr, check);
else if (ip_hdr(curr)->protocol == IPPROTO_UDP)
curr->csum_offset = offsetof(struct udphdr, check);
if (!(status & NETDEV_TX_MASK))
status = vnet_start_xmit(curr, dev);
if (status & NETDEV_TX_MASK)
dev_kfree_skb_any(curr);
}
if (!(status & NETDEV_TX_MASK))
dev_kfree_skb_any(skb);
return status;
}
static int vnet_start_xmit(struct sk_buff *skb, struct net_device *dev)
{
struct vnet *vp = netdev_priv(dev);
@ -972,15 +1267,9 @@ static int vnet_start_xmit(struct sk_buff *skb, struct net_device *dev)
unsigned int len;
struct sk_buff *freeskbs = NULL;
int i, err, txi;
void *start = NULL;
int nlen = 0;
unsigned pending = 0;
struct netdev_queue *txq;
skb = vnet_skb_shape(skb, &start, &nlen);
if (unlikely(!skb))
goto out_dropped;
rcu_read_lock();
port = __tx_port_find(vp, skb);
if (unlikely(!port)) {
@ -988,7 +1277,13 @@ static int vnet_start_xmit(struct sk_buff *skb, struct net_device *dev)
goto out_dropped;
}
if (skb->len > port->rmtu) {
if (skb_is_gso(skb) && skb->len > port->tsolen) {
err = vnet_handle_offloads(port, skb);
rcu_read_unlock();
return err;
}
if (!skb_is_gso(skb) && skb->len > port->rmtu) {
unsigned long localmtu = port->rmtu - ETH_HLEN;
if (vio_version_after_eq(&port->vio, 1, 3))
@ -1020,6 +1315,16 @@ static int vnet_start_xmit(struct sk_buff *skb, struct net_device *dev)
goto out_dropped;
}
skb = vnet_skb_shape(skb, 2);
if (unlikely(!skb)) {
rcu_read_unlock();
goto out_dropped;
}
if (skb->ip_summed == CHECKSUM_PARTIAL)
vnet_fullcsum(skb);
dr = &port->vio.drings[VIO_DRIVER_TX_RING];
i = skb_get_queue_mapping(skb);
txq = netdev_get_tx_queue(dev, i);
@ -1047,16 +1352,15 @@ static int vnet_start_xmit(struct sk_buff *skb, struct net_device *dev)
if (len < ETH_ZLEN)
len = ETH_ZLEN;
port->tx_bufs[txi].skb = skb;
skb = NULL;
err = ldc_map_single(port->vio.lp, start, nlen,
port->tx_bufs[txi].cookies, VNET_MAXCOOKIES,
(LDC_MAP_SHADOW | LDC_MAP_DIRECT | LDC_MAP_RW));
err = vnet_skb_map(port->vio.lp, skb, port->tx_bufs[txi].cookies, 2,
(LDC_MAP_SHADOW | LDC_MAP_DIRECT | LDC_MAP_RW));
if (err < 0) {
netdev_info(dev, "tx buffer map error %d\n", err);
goto out_dropped;
}
port->tx_bufs[txi].skb = skb;
skb = NULL;
port->tx_bufs[txi].ncookies = err;
/* We don't rely on the ACKs to free the skb in vnet_start_xmit(),
@ -1072,6 +1376,21 @@ static int vnet_start_xmit(struct sk_buff *skb, struct net_device *dev)
d->ncookies = port->tx_bufs[txi].ncookies;
for (i = 0; i < d->ncookies; i++)
d->cookies[i] = port->tx_bufs[txi].cookies[i];
if (vio_version_after_eq(&port->vio, 1, 7)) {
struct vio_net_dext *dext = vio_net_ext(d);
memset(dext, 0, sizeof(*dext));
if (skb_is_gso(port->tx_bufs[txi].skb)) {
dext->ipv4_lso_mss = skb_shinfo(port->tx_bufs[txi].skb)
->gso_size;
dext->flags |= VNET_PKT_IPV4_LSO;
}
if (vio_version_after_eq(&port->vio, 1, 8) &&
!port->switch_port) {
dext->flags |= VNET_PKT_HCK_IPV4_HDRCKSUM_OK;
dext->flags |= VNET_PKT_HCK_FULLCKSUM_OK;
}
}
/* This has to be a non-SMP write barrier because we are writing
* to memory which is shared with the peer LDOM.
@ -1361,18 +1680,20 @@ static void vnet_port_free_tx_bufs(struct vnet_port *port)
}
}
static int vnet_port_alloc_tx_bufs(struct vnet_port *port)
static int vnet_port_alloc_tx_ring(struct vnet_port *port)
{
struct vio_dring_state *dr;
unsigned long len;
unsigned long len, elen;
int i, err, ncookies;
void *dring;
dr = &port->vio.drings[VIO_DRIVER_TX_RING];
len = (VNET_TX_RING_SIZE *
(sizeof(struct vio_net_desc) +
(sizeof(struct ldc_trans_cookie) * 2)));
elen = sizeof(struct vio_net_desc) +
sizeof(struct ldc_trans_cookie) * 2;
if (vio_version_after_eq(&port->vio, 1, 7))
elen += sizeof(struct vio_net_dext);
len = VNET_TX_RING_SIZE * elen;
ncookies = VIO_MAX_RING_COOKIES;
dring = ldc_alloc_exp_dring(port->vio.lp, len,
@ -1386,8 +1707,7 @@ static int vnet_port_alloc_tx_bufs(struct vnet_port *port)
}
dr->base = dring;
dr->entry_size = (sizeof(struct vio_net_desc) +
(sizeof(struct ldc_trans_cookie) * 2));
dr->entry_size = elen;
dr->num_entries = VNET_TX_RING_SIZE;
dr->prod = dr->cons = 0;
port->start_cons = true; /* need an initial trigger */
@ -1471,6 +1791,10 @@ static struct vnet *vnet_new(const u64 *local_mac)
dev->ethtool_ops = &vnet_ethtool_ops;
dev->watchdog_timeo = VNET_TX_TIMEOUT;
dev->hw_features = NETIF_F_TSO | NETIF_F_GSO | NETIF_F_GSO_SOFTWARE |
NETIF_F_HW_CSUM | NETIF_F_SG;
dev->features = dev->hw_features;
err = register_netdev(dev);
if (err) {
pr_err("Cannot register net device, aborting\n");
@ -1640,10 +1964,6 @@ static int vnet_port_probe(struct vio_dev *vdev, const struct vio_device_id *id)
netif_napi_add(port->vp->dev, &port->napi, vnet_poll, NAPI_POLL_WEIGHT);
err = vnet_port_alloc_tx_bufs(port);
if (err)
goto err_out_free_ldc;
INIT_HLIST_NODE(&port->hash);
INIT_LIST_HEAD(&port->list);
@ -1651,6 +1971,8 @@ static int vnet_port_probe(struct vio_dev *vdev, const struct vio_device_id *id)
if (mdesc_get_property(hp, vdev->mp, "switch-port", NULL) != NULL)
switch_port = 1;
port->switch_port = switch_port;
port->tso = true;
port->tsolen = 0;
spin_lock_irqsave(&vp->lock, flags);
if (switch_port)
@ -1677,10 +1999,6 @@ static int vnet_port_probe(struct vio_dev *vdev, const struct vio_device_id *id)
return 0;
err_out_free_ldc:
netif_napi_del(&port->napi);
vio_ldc_free(&port->vio);
err_out_free_port:
kfree(port);

9
drivers/net/ethernet/sun/sunvnet.h
View File

@ -20,6 +20,9 @@
#define VNET_TX_RING_SIZE 512
#define VNET_TX_WAKEUP_THRESH(dr) ((dr)->pending / 4)
#define VNET_MINTSO 2048 /* VIO protocol's minimum TSO len */
#define VNET_MAXTSO 65535 /* VIO protocol's maximum TSO len */
/* VNET packets are sent in buffers with the first 6 bytes skipped
* so that after the ethernet header the IPv4/IPv6 headers are aligned
* properly.
@ -40,8 +43,9 @@ struct vnet_port {
struct hlist_node hash;
u8 raddr[ETH_ALEN];
u8 switch_port;
u8 __pad;
unsigned switch_port:1;
unsigned tso:1;
unsigned __pad:14;
struct vnet *vp;
@ -56,6 +60,7 @@ struct vnet_port {
struct timer_list clean_timer;
u64 rmtu;
u16 tsolen;
struct napi_struct napi;
u32 napi_stop_idx;