2018-02-06 12:34:23 -07:00
|
|
|
// SPDX-License-Identifier: GPL-2.0
|
2016-03-15 12:35:37 -06:00
|
|
|
/* sunvnet.c: Sun LDOM Virtual Network Driver.
|
|
|
|
*
|
|
|
|
* Copyright (C) 2007, 2008 David S. Miller <davem@davemloft.net>
|
2017-03-14 11:24:39 -06:00
|
|
|
* Copyright (C) 2016-2017 Oracle. All rights reserved.
|
2016-03-15 12:35:37 -06:00
|
|
|
*/
|
|
|
|
|
|
|
|
#include <linux/module.h>
|
|
|
|
#include <linux/kernel.h>
|
|
|
|
#include <linux/types.h>
|
|
|
|
#include <linux/slab.h>
|
|
|
|
#include <linux/delay.h>
|
|
|
|
#include <linux/init.h>
|
|
|
|
#include <linux/netdevice.h>
|
|
|
|
#include <linux/ethtool.h>
|
|
|
|
#include <linux/etherdevice.h>
|
|
|
|
#include <linux/mutex.h>
|
|
|
|
#include <linux/highmem.h>
|
|
|
|
#include <linux/if_vlan.h>
|
|
|
|
#define CREATE_TRACE_POINTS
|
|
|
|
#include <trace/events/sunvnet.h>
|
|
|
|
|
|
|
|
#if IS_ENABLED(CONFIG_IPV6)
|
|
|
|
#include <linux/icmpv6.h>
|
|
|
|
#endif
|
|
|
|
|
|
|
|
#include <net/ip.h>
|
|
|
|
#include <net/icmp.h>
|
|
|
|
#include <net/route.h>
|
|
|
|
|
|
|
|
#include <asm/vio.h>
|
|
|
|
#include <asm/ldc.h>
|
|
|
|
|
|
|
|
#include "sunvnet_common.h"
|
|
|
|
|
|
|
|
/* Heuristic for the number of times to exponentially backoff and
|
|
|
|
* retry sending an LDC trigger when EAGAIN is encountered
|
|
|
|
*/
|
|
|
|
#define VNET_MAX_RETRIES 10
|
|
|
|
|
2017-02-13 11:56:57 -07:00
|
|
|
MODULE_AUTHOR("David S. Miller (davem@davemloft.net)");
|
|
|
|
MODULE_DESCRIPTION("Sun LDOM virtual network support library");
|
|
|
|
MODULE_LICENSE("GPL");
|
|
|
|
MODULE_VERSION("1.1");
|
|
|
|
|
2016-03-15 12:35:37 -06:00
|
|
|
static int __vnet_tx_trigger(struct vnet_port *port, u32 start);
|
|
|
|
|
|
|
|
static inline u32 vnet_tx_dring_avail(struct vio_dring_state *dr)
|
|
|
|
{
|
|
|
|
return vio_dring_avail(dr, VNET_TX_RING_SIZE);
|
|
|
|
}
|
|
|
|
|
|
|
|
static int vnet_handle_unknown(struct vnet_port *port, void *arg)
|
|
|
|
{
|
|
|
|
struct vio_msg_tag *pkt = arg;
|
|
|
|
|
|
|
|
pr_err("Received unknown msg [%02x:%02x:%04x:%08x]\n",
|
|
|
|
pkt->type, pkt->stype, pkt->stype_env, pkt->sid);
|
|
|
|
pr_err("Resetting connection\n");
|
|
|
|
|
|
|
|
ldc_disconnect(port->vio.lp);
|
|
|
|
|
|
|
|
return -ECONNRESET;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int vnet_port_alloc_tx_ring(struct vnet_port *port);
|
|
|
|
|
|
|
|
int sunvnet_send_attr_common(struct vio_driver_state *vio)
|
|
|
|
{
|
|
|
|
struct vnet_port *port = to_vnet_port(vio);
|
2016-03-15 12:35:38 -06:00
|
|
|
struct net_device *dev = VNET_PORT_TO_NET_DEVICE(port);
|
2016-03-15 12:35:37 -06:00
|
|
|
struct vio_net_attr_info pkt;
|
|
|
|
int framelen = ETH_FRAME_LEN;
|
|
|
|
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;
|
|
|
|
pkt.tag.stype = VIO_SUBTYPE_INFO;
|
|
|
|
pkt.tag.stype_env = VIO_ATTR_INFO;
|
|
|
|
pkt.tag.sid = vio_send_sid(vio);
|
|
|
|
if (vio_version_before(vio, 1, 2))
|
|
|
|
pkt.xfer_mode = VIO_DRING_MODE;
|
|
|
|
else
|
|
|
|
pkt.xfer_mode = VIO_NEW_DRING_MODE;
|
|
|
|
pkt.addr_type = VNET_ADDR_ETHERMAC;
|
|
|
|
pkt.ack_freq = 0;
|
|
|
|
for (i = 0; i < 6; i++)
|
|
|
|
pkt.addr |= (u64)dev->dev_addr[i] << ((5 - i) * 8);
|
|
|
|
if (vio_version_after(vio, 1, 3)) {
|
|
|
|
if (port->rmtu) {
|
|
|
|
port->rmtu = min(VNET_MAXPACKET, port->rmtu);
|
|
|
|
pkt.mtu = port->rmtu;
|
|
|
|
} else {
|
|
|
|
port->rmtu = VNET_MAXPACKET;
|
|
|
|
pkt.mtu = port->rmtu;
|
|
|
|
}
|
|
|
|
if (vio_version_after_eq(vio, 1, 6))
|
|
|
|
pkt.options = VIO_TX_DRING;
|
|
|
|
} else if (vio_version_before(vio, 1, 3)) {
|
|
|
|
pkt.mtu = framelen;
|
|
|
|
} else { /* v1.3 */
|
|
|
|
pkt.mtu = framelen + VLAN_HLEN;
|
|
|
|
}
|
|
|
|
|
|
|
|
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] "
|
|
|
|
"cflags[0x%04x] lso_max[%u]\n",
|
|
|
|
pkt.xfer_mode, pkt.addr_type,
|
|
|
|
(unsigned long long)pkt.addr,
|
|
|
|
pkt.ack_freq, pkt.plnk_updt, pkt.options,
|
|
|
|
(unsigned long long)pkt.mtu, pkt.cflags, pkt.ipv4_lso_maxlen);
|
|
|
|
|
|
|
|
return vio_ldc_send(vio, &pkt, sizeof(pkt));
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(sunvnet_send_attr_common);
|
|
|
|
|
|
|
|
static int handle_attr_info(struct vio_driver_state *vio,
|
|
|
|
struct vio_net_attr_info *pkt)
|
|
|
|
{
|
|
|
|
struct vnet_port *port = to_vnet_port(vio);
|
|
|
|
u64 localmtu;
|
|
|
|
u8 xfer_mode;
|
|
|
|
|
|
|
|
viodbg(HS, "GOT NET ATTR xmode[0x%x] atype[0x%x] addr[%llx] "
|
|
|
|
"ackfreq[%u] plnk_updt[0x%02x] opts[0x%02x] mtu[%llu] "
|
|
|
|
" (rmtu[%llu]) cflags[0x%04x] lso_max[%u]\n",
|
|
|
|
pkt->xfer_mode, pkt->addr_type,
|
|
|
|
(unsigned long long)pkt->addr,
|
|
|
|
pkt->ack_freq, pkt->plnk_updt, pkt->options,
|
|
|
|
(unsigned long long)pkt->mtu, port->rmtu, pkt->cflags,
|
|
|
|
pkt->ipv4_lso_maxlen);
|
|
|
|
|
|
|
|
pkt->tag.sid = vio_send_sid(vio);
|
|
|
|
|
|
|
|
xfer_mode = pkt->xfer_mode;
|
|
|
|
/* for version < 1.2, VIO_DRING_MODE = 0x3 and no bitmask */
|
|
|
|
if (vio_version_before(vio, 1, 2) && xfer_mode == VIO_DRING_MODE)
|
|
|
|
xfer_mode = VIO_NEW_DRING_MODE;
|
|
|
|
|
|
|
|
/* MTU negotiation:
|
|
|
|
* < v1.3 - ETH_FRAME_LEN exactly
|
|
|
|
* > v1.3 - MIN(pkt.mtu, VNET_MAXPACKET, port->rmtu) and change
|
|
|
|
* pkt->mtu for ACK
|
|
|
|
* = v1.3 - ETH_FRAME_LEN + VLAN_HLEN exactly
|
|
|
|
*/
|
|
|
|
if (vio_version_before(vio, 1, 3)) {
|
|
|
|
localmtu = ETH_FRAME_LEN;
|
|
|
|
} else if (vio_version_after(vio, 1, 3)) {
|
|
|
|
localmtu = port->rmtu ? port->rmtu : VNET_MAXPACKET;
|
|
|
|
localmtu = min(pkt->mtu, localmtu);
|
|
|
|
pkt->mtu = localmtu;
|
|
|
|
} else { /* v1.3 */
|
|
|
|
localmtu = ETH_FRAME_LEN + VLAN_HLEN;
|
|
|
|
}
|
|
|
|
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;
|
2017-02-13 11:57:04 -07:00
|
|
|
port->tsolen = 0;
|
2016-03-15 12:35:37 -06:00
|
|
|
}
|
|
|
|
|
|
|
|
/* for version >= 1.6, ACK packet mode we support */
|
|
|
|
if (vio_version_after_eq(vio, 1, 6)) {
|
|
|
|
pkt->xfer_mode = VIO_NEW_DRING_MODE;
|
|
|
|
pkt->options = VIO_TX_DRING;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (!(xfer_mode | VIO_NEW_DRING_MODE) ||
|
|
|
|
pkt->addr_type != VNET_ADDR_ETHERMAC ||
|
|
|
|
pkt->mtu != localmtu) {
|
|
|
|
viodbg(HS, "SEND NET ATTR NACK\n");
|
|
|
|
|
|
|
|
pkt->tag.stype = VIO_SUBTYPE_NACK;
|
|
|
|
|
2016-03-15 12:35:40 -06:00
|
|
|
(void)vio_ldc_send(vio, pkt, sizeof(*pkt));
|
2016-03-15 12:35:37 -06:00
|
|
|
|
|
|
|
return -ECONNRESET;
|
|
|
|
}
|
|
|
|
|
2016-03-15 12:35:40 -06:00
|
|
|
viodbg(HS, "SEND NET ATTR ACK xmode[0x%x] atype[0x%x] "
|
|
|
|
"addr[%llx] ackfreq[%u] plnk_updt[0x%02x] opts[0x%02x] "
|
|
|
|
"mtu[%llu] (rmtu[%llu]) cflags[0x%04x] lso_max[%u]\n",
|
|
|
|
pkt->xfer_mode, pkt->addr_type,
|
|
|
|
(unsigned long long)pkt->addr,
|
|
|
|
pkt->ack_freq, pkt->plnk_updt, pkt->options,
|
|
|
|
(unsigned long long)pkt->mtu, port->rmtu, pkt->cflags,
|
|
|
|
pkt->ipv4_lso_maxlen);
|
|
|
|
|
|
|
|
pkt->tag.stype = VIO_SUBTYPE_ACK;
|
|
|
|
|
|
|
|
return vio_ldc_send(vio, pkt, sizeof(*pkt));
|
2016-03-15 12:35:37 -06:00
|
|
|
}
|
|
|
|
|
|
|
|
static int handle_attr_ack(struct vio_driver_state *vio,
|
|
|
|
struct vio_net_attr_info *pkt)
|
|
|
|
{
|
|
|
|
viodbg(HS, "GOT NET ATTR ACK\n");
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int handle_attr_nack(struct vio_driver_state *vio,
|
|
|
|
struct vio_net_attr_info *pkt)
|
|
|
|
{
|
|
|
|
viodbg(HS, "GOT NET ATTR NACK\n");
|
|
|
|
|
|
|
|
return -ECONNRESET;
|
|
|
|
}
|
|
|
|
|
|
|
|
int sunvnet_handle_attr_common(struct vio_driver_state *vio, void *arg)
|
|
|
|
{
|
|
|
|
struct vio_net_attr_info *pkt = arg;
|
|
|
|
|
|
|
|
switch (pkt->tag.stype) {
|
|
|
|
case VIO_SUBTYPE_INFO:
|
|
|
|
return handle_attr_info(vio, pkt);
|
|
|
|
|
|
|
|
case VIO_SUBTYPE_ACK:
|
|
|
|
return handle_attr_ack(vio, pkt);
|
|
|
|
|
|
|
|
case VIO_SUBTYPE_NACK:
|
|
|
|
return handle_attr_nack(vio, pkt);
|
|
|
|
|
|
|
|
default:
|
|
|
|
return -ECONNRESET;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(sunvnet_handle_attr_common);
|
|
|
|
|
|
|
|
void sunvnet_handshake_complete_common(struct vio_driver_state *vio)
|
|
|
|
{
|
|
|
|
struct vio_dring_state *dr;
|
|
|
|
|
|
|
|
dr = &vio->drings[VIO_DRIVER_RX_RING];
|
2016-03-15 12:35:40 -06:00
|
|
|
dr->rcv_nxt = 1;
|
|
|
|
dr->snd_nxt = 1;
|
2016-03-15 12:35:37 -06:00
|
|
|
|
|
|
|
dr = &vio->drings[VIO_DRIVER_TX_RING];
|
2016-03-15 12:35:40 -06:00
|
|
|
dr->rcv_nxt = 1;
|
|
|
|
dr->snd_nxt = 1;
|
2016-03-15 12:35:37 -06:00
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(sunvnet_handshake_complete_common);
|
|
|
|
|
|
|
|
/* The hypervisor interface that implements copying to/from imported
|
|
|
|
* memory from another domain requires that copies are done to 8-byte
|
|
|
|
* aligned buffers, and that the lengths of such copies are also 8-byte
|
|
|
|
* multiples.
|
|
|
|
*
|
|
|
|
* So we align skb->data to an 8-byte multiple and pad-out the data
|
|
|
|
* area so we can round the copy length up to the next multiple of
|
|
|
|
* 8 for the copy.
|
|
|
|
*
|
|
|
|
* The transmitter puts the actual start of the packet 6 bytes into
|
|
|
|
* the buffer it sends over, so that the IP headers after the ethernet
|
|
|
|
* header are aligned properly. These 6 bytes are not in the descriptor
|
|
|
|
* length, they are simply implied. This offset is represented using
|
|
|
|
* the VNET_PACKET_SKIP macro.
|
|
|
|
*/
|
|
|
|
static struct sk_buff *alloc_and_align_skb(struct net_device *dev,
|
|
|
|
unsigned int len)
|
|
|
|
{
|
2016-03-15 12:35:40 -06:00
|
|
|
struct sk_buff *skb;
|
2016-03-15 12:35:37 -06:00
|
|
|
unsigned long addr, off;
|
|
|
|
|
2016-03-15 12:35:40 -06:00
|
|
|
skb = netdev_alloc_skb(dev, len + VNET_PACKET_SKIP + 8 + 8);
|
2016-03-15 12:35:37 -06:00
|
|
|
if (unlikely(!skb))
|
|
|
|
return NULL;
|
|
|
|
|
2016-03-15 12:35:40 -06:00
|
|
|
addr = (unsigned long)skb->data;
|
2016-03-15 12:35:37 -06:00
|
|
|
off = ((addr + 7UL) & ~7UL) - addr;
|
|
|
|
if (off)
|
|
|
|
skb_reserve(skb, off);
|
|
|
|
|
|
|
|
return skb;
|
|
|
|
}
|
|
|
|
|
2017-07-06 17:57:10 -06:00
|
|
|
static inline void vnet_fullcsum_ipv4(struct sk_buff *skb)
|
2016-03-15 12:35:37 -06:00
|
|
|
{
|
|
|
|
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);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2017-07-06 17:57:10 -06:00
|
|
|
#if IS_ENABLED(CONFIG_IPV6)
|
|
|
|
static inline void vnet_fullcsum_ipv6(struct sk_buff *skb)
|
|
|
|
{
|
|
|
|
struct ipv6hdr *ip6h = ipv6_hdr(skb);
|
|
|
|
int offset = skb_transport_offset(skb);
|
|
|
|
|
|
|
|
if (skb->protocol != htons(ETH_P_IPV6))
|
|
|
|
return;
|
|
|
|
if (ip6h->nexthdr != IPPROTO_TCP &&
|
|
|
|
ip6h->nexthdr != IPPROTO_UDP)
|
|
|
|
return;
|
|
|
|
skb->ip_summed = CHECKSUM_NONE;
|
|
|
|
skb->csum_level = 1;
|
|
|
|
skb->csum = 0;
|
|
|
|
if (ip6h->nexthdr == IPPROTO_TCP) {
|
|
|
|
struct tcphdr *ptcp = tcp_hdr(skb);
|
|
|
|
|
|
|
|
ptcp->check = 0;
|
|
|
|
skb->csum = skb_checksum(skb, offset, skb->len - offset, 0);
|
|
|
|
ptcp->check = csum_ipv6_magic(&ip6h->saddr, &ip6h->daddr,
|
|
|
|
skb->len - offset, IPPROTO_TCP,
|
|
|
|
skb->csum);
|
|
|
|
} else if (ip6h->nexthdr == IPPROTO_UDP) {
|
|
|
|
struct udphdr *pudp = udp_hdr(skb);
|
|
|
|
|
|
|
|
pudp->check = 0;
|
|
|
|
skb->csum = skb_checksum(skb, offset, skb->len - offset, 0);
|
|
|
|
pudp->check = csum_ipv6_magic(&ip6h->saddr, &ip6h->daddr,
|
|
|
|
skb->len - offset, IPPROTO_UDP,
|
|
|
|
skb->csum);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
#endif
|
|
|
|
|
2016-03-15 12:35:37 -06:00
|
|
|
static int vnet_rx_one(struct vnet_port *port, struct vio_net_desc *desc)
|
|
|
|
{
|
2016-03-15 12:35:38 -06:00
|
|
|
struct net_device *dev = VNET_PORT_TO_NET_DEVICE(port);
|
2016-03-15 12:35:37 -06:00
|
|
|
unsigned int len = desc->size;
|
|
|
|
unsigned int copy_len;
|
|
|
|
struct sk_buff *skb;
|
|
|
|
int maxlen;
|
|
|
|
int err;
|
|
|
|
|
|
|
|
err = -EMSGSIZE;
|
|
|
|
if (port->tso && port->tsolen > port->rmtu)
|
|
|
|
maxlen = port->tsolen;
|
|
|
|
else
|
|
|
|
maxlen = port->rmtu;
|
|
|
|
if (unlikely(len < ETH_ZLEN || len > maxlen)) {
|
|
|
|
dev->stats.rx_length_errors++;
|
|
|
|
goto out_dropped;
|
|
|
|
}
|
|
|
|
|
|
|
|
skb = alloc_and_align_skb(dev, len);
|
|
|
|
err = -ENOMEM;
|
|
|
|
if (unlikely(!skb)) {
|
|
|
|
dev->stats.rx_missed_errors++;
|
|
|
|
goto out_dropped;
|
|
|
|
}
|
|
|
|
|
|
|
|
copy_len = (len + VNET_PACKET_SKIP + 7U) & ~7U;
|
|
|
|
skb_put(skb, copy_len);
|
|
|
|
err = ldc_copy(port->vio.lp, LDC_COPY_IN,
|
|
|
|
skb->data, copy_len, 0,
|
|
|
|
desc->cookies, desc->ncookies);
|
|
|
|
if (unlikely(err < 0)) {
|
|
|
|
dev->stats.rx_frame_errors++;
|
|
|
|
goto out_free_skb;
|
|
|
|
}
|
|
|
|
|
|
|
|
skb_pull(skb, VNET_PACKET_SKIP);
|
|
|
|
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);
|
|
|
|
|
|
|
|
skb_reset_network_header(skb);
|
|
|
|
|
|
|
|
if (dext->flags & VNET_PKT_HCK_IPV4_HDRCKSUM) {
|
|
|
|
if (skb->protocol == ETH_P_IP) {
|
|
|
|
struct iphdr *iph = ip_hdr(skb);
|
|
|
|
|
|
|
|
iph->check = 0;
|
|
|
|
ip_send_check(iph);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
if ((dext->flags & VNET_PKT_HCK_FULLCKSUM) &&
|
|
|
|
skb->ip_summed == CHECKSUM_NONE) {
|
|
|
|
if (skb->protocol == htons(ETH_P_IP)) {
|
|
|
|
struct iphdr *iph = ip_hdr(skb);
|
|
|
|
int ihl = iph->ihl * 4;
|
|
|
|
|
|
|
|
skb_set_transport_header(skb, ihl);
|
2017-07-06 17:57:10 -06:00
|
|
|
vnet_fullcsum_ipv4(skb);
|
|
|
|
#if IS_ENABLED(CONFIG_IPV6)
|
|
|
|
} else if (skb->protocol == htons(ETH_P_IPV6)) {
|
|
|
|
skb_set_transport_header(skb,
|
|
|
|
sizeof(struct ipv6hdr));
|
|
|
|
vnet_fullcsum_ipv6(skb);
|
|
|
|
#endif
|
2016-03-15 12:35:37 -06:00
|
|
|
}
|
|
|
|
}
|
|
|
|
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;
|
|
|
|
|
2017-03-14 11:24:42 -06:00
|
|
|
if (unlikely(is_multicast_ether_addr(eth_hdr(skb)->h_dest)))
|
|
|
|
dev->stats.multicast++;
|
2016-03-15 12:35:37 -06:00
|
|
|
dev->stats.rx_packets++;
|
|
|
|
dev->stats.rx_bytes += len;
|
2017-03-14 11:24:40 -06:00
|
|
|
port->stats.rx_packets++;
|
|
|
|
port->stats.rx_bytes += len;
|
2016-03-15 12:35:37 -06:00
|
|
|
napi_gro_receive(&port->napi, skb);
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
out_free_skb:
|
|
|
|
kfree_skb(skb);
|
|
|
|
|
|
|
|
out_dropped:
|
|
|
|
dev->stats.rx_dropped++;
|
|
|
|
return err;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int vnet_send_ack(struct vnet_port *port, struct vio_dring_state *dr,
|
|
|
|
u32 start, u32 end, u8 vio_dring_state)
|
|
|
|
{
|
|
|
|
struct vio_dring_data hdr = {
|
|
|
|
.tag = {
|
|
|
|
.type = VIO_TYPE_DATA,
|
|
|
|
.stype = VIO_SUBTYPE_ACK,
|
|
|
|
.stype_env = VIO_DRING_DATA,
|
|
|
|
.sid = vio_send_sid(&port->vio),
|
|
|
|
},
|
|
|
|
.dring_ident = dr->ident,
|
|
|
|
.start_idx = start,
|
|
|
|
.end_idx = end,
|
|
|
|
.state = vio_dring_state,
|
|
|
|
};
|
|
|
|
int err, delay;
|
|
|
|
int retries = 0;
|
|
|
|
|
|
|
|
hdr.seq = dr->snd_nxt;
|
|
|
|
delay = 1;
|
|
|
|
do {
|
|
|
|
err = vio_ldc_send(&port->vio, &hdr, sizeof(hdr));
|
|
|
|
if (err > 0) {
|
|
|
|
dr->snd_nxt++;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
udelay(delay);
|
|
|
|
if ((delay <<= 1) > 128)
|
|
|
|
delay = 128;
|
|
|
|
if (retries++ > VNET_MAX_RETRIES) {
|
|
|
|
pr_info("ECONNRESET %x:%x:%x:%x:%x:%x\n",
|
|
|
|
port->raddr[0], port->raddr[1],
|
|
|
|
port->raddr[2], port->raddr[3],
|
|
|
|
port->raddr[4], port->raddr[5]);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
} while (err == -EAGAIN);
|
|
|
|
|
|
|
|
if (err <= 0 && vio_dring_state == VIO_DRING_STOPPED) {
|
|
|
|
port->stop_rx_idx = end;
|
|
|
|
port->stop_rx = true;
|
|
|
|
} else {
|
|
|
|
port->stop_rx_idx = 0;
|
|
|
|
port->stop_rx = false;
|
|
|
|
}
|
|
|
|
|
|
|
|
return err;
|
|
|
|
}
|
|
|
|
|
|
|
|
static struct vio_net_desc *get_rx_desc(struct vnet_port *port,
|
|
|
|
struct vio_dring_state *dr,
|
|
|
|
u32 index)
|
|
|
|
{
|
|
|
|
struct vio_net_desc *desc = port->vio.desc_buf;
|
|
|
|
int err;
|
|
|
|
|
|
|
|
err = ldc_get_dring_entry(port->vio.lp, desc, dr->entry_size,
|
|
|
|
(index * dr->entry_size),
|
|
|
|
dr->cookies, dr->ncookies);
|
|
|
|
if (err < 0)
|
|
|
|
return ERR_PTR(err);
|
|
|
|
|
|
|
|
return desc;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int put_rx_desc(struct vnet_port *port,
|
|
|
|
struct vio_dring_state *dr,
|
|
|
|
struct vio_net_desc *desc,
|
|
|
|
u32 index)
|
|
|
|
{
|
|
|
|
int err;
|
|
|
|
|
|
|
|
err = ldc_put_dring_entry(port->vio.lp, desc, dr->entry_size,
|
|
|
|
(index * dr->entry_size),
|
|
|
|
dr->cookies, dr->ncookies);
|
|
|
|
if (err < 0)
|
|
|
|
return err;
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int vnet_walk_rx_one(struct vnet_port *port,
|
|
|
|
struct vio_dring_state *dr,
|
|
|
|
u32 index, int *needs_ack)
|
|
|
|
{
|
|
|
|
struct vio_net_desc *desc = get_rx_desc(port, dr, index);
|
|
|
|
struct vio_driver_state *vio = &port->vio;
|
|
|
|
int err;
|
|
|
|
|
2016-03-15 12:35:40 -06:00
|
|
|
BUG_ON(!desc);
|
2016-03-15 12:35:37 -06:00
|
|
|
if (IS_ERR(desc))
|
|
|
|
return PTR_ERR(desc);
|
|
|
|
|
|
|
|
if (desc->hdr.state != VIO_DESC_READY)
|
|
|
|
return 1;
|
|
|
|
|
|
|
|
dma_rmb();
|
|
|
|
|
|
|
|
viodbg(DATA, "vio_walk_rx_one desc[%02x:%02x:%08x:%08x:%llx:%llx]\n",
|
|
|
|
desc->hdr.state, desc->hdr.ack,
|
|
|
|
desc->size, desc->ncookies,
|
|
|
|
desc->cookies[0].cookie_addr,
|
|
|
|
desc->cookies[0].cookie_size);
|
|
|
|
|
|
|
|
err = vnet_rx_one(port, desc);
|
|
|
|
if (err == -ECONNRESET)
|
|
|
|
return err;
|
|
|
|
trace_vnet_rx_one(port->vio._local_sid, port->vio._peer_sid,
|
|
|
|
index, desc->hdr.ack);
|
|
|
|
desc->hdr.state = VIO_DESC_DONE;
|
|
|
|
err = put_rx_desc(port, dr, desc, index);
|
|
|
|
if (err < 0)
|
|
|
|
return err;
|
|
|
|
*needs_ack = desc->hdr.ack;
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int vnet_walk_rx(struct vnet_port *port, struct vio_dring_state *dr,
|
|
|
|
u32 start, u32 end, int *npkts, int budget)
|
|
|
|
{
|
|
|
|
struct vio_driver_state *vio = &port->vio;
|
|
|
|
int ack_start = -1, ack_end = -1;
|
|
|
|
bool send_ack = true;
|
|
|
|
|
2016-03-15 12:35:40 -06:00
|
|
|
end = (end == (u32)-1) ? vio_dring_prev(dr, start)
|
|
|
|
: vio_dring_next(dr, end);
|
2016-03-15 12:35:37 -06:00
|
|
|
|
|
|
|
viodbg(DATA, "vnet_walk_rx start[%08x] end[%08x]\n", start, end);
|
|
|
|
|
|
|
|
while (start != end) {
|
|
|
|
int ack = 0, err = vnet_walk_rx_one(port, dr, start, &ack);
|
2016-03-15 12:35:40 -06:00
|
|
|
|
2016-03-15 12:35:37 -06:00
|
|
|
if (err == -ECONNRESET)
|
|
|
|
return err;
|
|
|
|
if (err != 0)
|
|
|
|
break;
|
|
|
|
(*npkts)++;
|
|
|
|
if (ack_start == -1)
|
|
|
|
ack_start = start;
|
|
|
|
ack_end = start;
|
|
|
|
start = vio_dring_next(dr, start);
|
|
|
|
if (ack && start != end) {
|
|
|
|
err = vnet_send_ack(port, dr, ack_start, ack_end,
|
|
|
|
VIO_DRING_ACTIVE);
|
|
|
|
if (err == -ECONNRESET)
|
|
|
|
return err;
|
|
|
|
ack_start = -1;
|
|
|
|
}
|
|
|
|
if ((*npkts) >= budget) {
|
|
|
|
send_ack = false;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
2016-03-15 12:35:40 -06:00
|
|
|
if (unlikely(ack_start == -1)) {
|
|
|
|
ack_end = vio_dring_prev(dr, start);
|
|
|
|
ack_start = ack_end;
|
|
|
|
}
|
2016-03-15 12:35:37 -06:00
|
|
|
if (send_ack) {
|
|
|
|
port->napi_resume = false;
|
|
|
|
trace_vnet_tx_send_stopped_ack(port->vio._local_sid,
|
|
|
|
port->vio._peer_sid,
|
|
|
|
ack_end, *npkts);
|
|
|
|
return vnet_send_ack(port, dr, ack_start, ack_end,
|
|
|
|
VIO_DRING_STOPPED);
|
|
|
|
} else {
|
|
|
|
trace_vnet_tx_defer_stopped_ack(port->vio._local_sid,
|
|
|
|
port->vio._peer_sid,
|
|
|
|
ack_end, *npkts);
|
|
|
|
port->napi_resume = true;
|
|
|
|
port->napi_stop_idx = ack_end;
|
|
|
|
return 1;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
static int vnet_rx(struct vnet_port *port, void *msgbuf, int *npkts,
|
|
|
|
int budget)
|
|
|
|
{
|
|
|
|
struct vio_dring_data *pkt = msgbuf;
|
|
|
|
struct vio_dring_state *dr = &port->vio.drings[VIO_DRIVER_RX_RING];
|
|
|
|
struct vio_driver_state *vio = &port->vio;
|
|
|
|
|
|
|
|
viodbg(DATA, "vnet_rx stype_env[%04x] seq[%016llx] rcv_nxt[%016llx]\n",
|
|
|
|
pkt->tag.stype_env, pkt->seq, dr->rcv_nxt);
|
|
|
|
|
|
|
|
if (unlikely(pkt->tag.stype_env != VIO_DRING_DATA))
|
|
|
|
return 0;
|
|
|
|
if (unlikely(pkt->seq != dr->rcv_nxt)) {
|
|
|
|
pr_err("RX out of sequence seq[0x%llx] rcv_nxt[0x%llx]\n",
|
|
|
|
pkt->seq, dr->rcv_nxt);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (!port->napi_resume)
|
|
|
|
dr->rcv_nxt++;
|
|
|
|
|
|
|
|
/* XXX Validate pkt->start_idx and pkt->end_idx XXX */
|
|
|
|
|
|
|
|
return vnet_walk_rx(port, dr, pkt->start_idx, pkt->end_idx,
|
|
|
|
npkts, budget);
|
|
|
|
}
|
|
|
|
|
|
|
|
static int idx_is_pending(struct vio_dring_state *dr, u32 end)
|
|
|
|
{
|
|
|
|
u32 idx = dr->cons;
|
|
|
|
int found = 0;
|
|
|
|
|
|
|
|
while (idx != dr->prod) {
|
|
|
|
if (idx == end) {
|
|
|
|
found = 1;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
idx = vio_dring_next(dr, idx);
|
|
|
|
}
|
|
|
|
return found;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int vnet_ack(struct vnet_port *port, void *msgbuf)
|
|
|
|
{
|
|
|
|
struct vio_dring_state *dr = &port->vio.drings[VIO_DRIVER_TX_RING];
|
|
|
|
struct vio_dring_data *pkt = msgbuf;
|
|
|
|
struct net_device *dev;
|
|
|
|
u32 end;
|
|
|
|
struct vio_net_desc *desc;
|
|
|
|
struct netdev_queue *txq;
|
|
|
|
|
|
|
|
if (unlikely(pkt->tag.stype_env != VIO_DRING_DATA))
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
end = pkt->end_idx;
|
2016-03-15 12:35:38 -06:00
|
|
|
dev = VNET_PORT_TO_NET_DEVICE(port);
|
2016-03-15 12:35:37 -06:00
|
|
|
netif_tx_lock(dev);
|
|
|
|
if (unlikely(!idx_is_pending(dr, end))) {
|
|
|
|
netif_tx_unlock(dev);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* sync for race conditions with vnet_start_xmit() and tell xmit it
|
|
|
|
* is time to send a trigger.
|
|
|
|
*/
|
|
|
|
trace_vnet_rx_stopped_ack(port->vio._local_sid,
|
|
|
|
port->vio._peer_sid, end);
|
|
|
|
dr->cons = vio_dring_next(dr, end);
|
|
|
|
desc = vio_dring_entry(dr, dr->cons);
|
|
|
|
if (desc->hdr.state == VIO_DESC_READY && !port->start_cons) {
|
|
|
|
/* vnet_start_xmit() just populated this dring but missed
|
|
|
|
* sending the "start" LDC message to the consumer.
|
|
|
|
* Send a "start" trigger on its behalf.
|
|
|
|
*/
|
|
|
|
if (__vnet_tx_trigger(port, dr->cons) > 0)
|
|
|
|
port->start_cons = false;
|
|
|
|
else
|
|
|
|
port->start_cons = true;
|
|
|
|
} else {
|
|
|
|
port->start_cons = true;
|
|
|
|
}
|
|
|
|
netif_tx_unlock(dev);
|
|
|
|
|
|
|
|
txq = netdev_get_tx_queue(dev, port->q_index);
|
|
|
|
if (unlikely(netif_tx_queue_stopped(txq) &&
|
|
|
|
vnet_tx_dring_avail(dr) >= VNET_TX_WAKEUP_THRESH(dr)))
|
|
|
|
return 1;
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int vnet_nack(struct vnet_port *port, void *msgbuf)
|
|
|
|
{
|
|
|
|
/* XXX just reset or similar XXX */
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int handle_mcast(struct vnet_port *port, void *msgbuf)
|
|
|
|
{
|
|
|
|
struct vio_net_mcast_info *pkt = msgbuf;
|
2016-03-15 12:35:38 -06:00
|
|
|
struct net_device *dev = VNET_PORT_TO_NET_DEVICE(port);
|
2016-03-15 12:35:37 -06:00
|
|
|
|
|
|
|
if (pkt->tag.stype != VIO_SUBTYPE_ACK)
|
|
|
|
pr_err("%s: Got unexpected MCAST reply [%02x:%02x:%04x:%08x]\n",
|
2016-03-15 12:35:38 -06:00
|
|
|
dev->name,
|
2016-03-15 12:35:37 -06:00
|
|
|
pkt->tag.type,
|
|
|
|
pkt->tag.stype,
|
|
|
|
pkt->tag.stype_env,
|
|
|
|
pkt->tag.sid);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2016-10-28 12:26:19 -06:00
|
|
|
/* If the queue is stopped, wake it up so that we'll
|
|
|
|
* send out another START message at the next TX.
|
2016-03-15 12:35:37 -06:00
|
|
|
*/
|
|
|
|
static void maybe_tx_wakeup(struct vnet_port *port)
|
|
|
|
{
|
|
|
|
struct netdev_queue *txq;
|
|
|
|
|
2016-03-15 12:35:38 -06:00
|
|
|
txq = netdev_get_tx_queue(VNET_PORT_TO_NET_DEVICE(port),
|
|
|
|
port->q_index);
|
2016-03-15 12:35:37 -06:00
|
|
|
__netif_tx_lock(txq, smp_processor_id());
|
2017-02-13 11:56:58 -07:00
|
|
|
if (likely(netif_tx_queue_stopped(txq)))
|
2016-03-15 12:35:37 -06:00
|
|
|
netif_tx_wake_queue(txq);
|
|
|
|
__netif_tx_unlock(txq);
|
|
|
|
}
|
|
|
|
|
2016-03-15 12:35:38 -06:00
|
|
|
bool sunvnet_port_is_up_common(struct vnet_port *vnet)
|
2016-03-15 12:35:37 -06:00
|
|
|
{
|
|
|
|
struct vio_driver_state *vio = &vnet->vio;
|
|
|
|
|
|
|
|
return !!(vio->hs_state & VIO_HS_COMPLETE);
|
|
|
|
}
|
2016-03-15 12:35:38 -06:00
|
|
|
EXPORT_SYMBOL_GPL(sunvnet_port_is_up_common);
|
2016-03-15 12:35:37 -06:00
|
|
|
|
|
|
|
static int vnet_event_napi(struct vnet_port *port, int budget)
|
|
|
|
{
|
2016-10-28 12:26:19 -06:00
|
|
|
struct net_device *dev = VNET_PORT_TO_NET_DEVICE(port);
|
2016-03-15 12:35:37 -06:00
|
|
|
struct vio_driver_state *vio = &port->vio;
|
|
|
|
int tx_wakeup, err;
|
|
|
|
int npkts = 0;
|
2017-02-13 11:57:01 -07:00
|
|
|
|
|
|
|
/* we don't expect any other bits */
|
|
|
|
BUG_ON(port->rx_event & ~(LDC_EVENT_DATA_READY |
|
|
|
|
LDC_EVENT_RESET |
|
|
|
|
LDC_EVENT_UP));
|
|
|
|
|
|
|
|
/* RESET takes precedent over any other event */
|
|
|
|
if (port->rx_event & LDC_EVENT_RESET) {
|
2017-03-14 11:24:39 -06:00
|
|
|
/* a link went down */
|
|
|
|
|
|
|
|
if (port->vsw == 1) {
|
|
|
|
netif_tx_stop_all_queues(dev);
|
|
|
|
netif_carrier_off(dev);
|
|
|
|
}
|
|
|
|
|
2017-02-13 11:57:01 -07:00
|
|
|
vio_link_state_change(vio, LDC_EVENT_RESET);
|
|
|
|
vnet_port_reset(port);
|
|
|
|
vio_port_up(vio);
|
|
|
|
|
|
|
|
/* If the device is running but its tx queue was
|
|
|
|
* stopped (due to flow control), restart it.
|
|
|
|
* This is necessary since vnet_port_reset()
|
|
|
|
* clears the tx drings and thus we may never get
|
|
|
|
* back a VIO_TYPE_DATA ACK packet - which is
|
|
|
|
* the normal mechanism to restart the tx queue.
|
|
|
|
*/
|
|
|
|
if (netif_running(dev))
|
|
|
|
maybe_tx_wakeup(port);
|
|
|
|
|
2016-03-15 12:35:37 -06:00
|
|
|
port->rx_event = 0;
|
2017-03-14 11:24:40 -06:00
|
|
|
port->stats.event_reset++;
|
2016-03-15 12:35:37 -06:00
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2017-02-13 11:57:01 -07:00
|
|
|
if (port->rx_event & LDC_EVENT_UP) {
|
2017-03-14 11:24:39 -06:00
|
|
|
/* a link came up */
|
|
|
|
|
|
|
|
if (port->vsw == 1) {
|
|
|
|
netif_carrier_on(port->dev);
|
|
|
|
netif_tx_start_all_queues(port->dev);
|
|
|
|
}
|
|
|
|
|
2017-02-13 11:57:01 -07:00
|
|
|
vio_link_state_change(vio, LDC_EVENT_UP);
|
|
|
|
port->rx_event = 0;
|
2017-03-14 11:24:40 -06:00
|
|
|
port->stats.event_up++;
|
2017-02-13 11:57:01 -07:00
|
|
|
return 0;
|
|
|
|
}
|
2016-03-15 12:35:37 -06:00
|
|
|
|
2016-03-15 12:35:40 -06:00
|
|
|
err = 0;
|
|
|
|
tx_wakeup = 0;
|
2016-03-15 12:35:37 -06:00
|
|
|
while (1) {
|
|
|
|
union {
|
|
|
|
struct vio_msg_tag tag;
|
|
|
|
u64 raw[8];
|
|
|
|
} msgbuf;
|
|
|
|
|
|
|
|
if (port->napi_resume) {
|
|
|
|
struct vio_dring_data *pkt =
|
|
|
|
(struct vio_dring_data *)&msgbuf;
|
|
|
|
struct vio_dring_state *dr =
|
|
|
|
&port->vio.drings[VIO_DRIVER_RX_RING];
|
|
|
|
|
|
|
|
pkt->tag.type = VIO_TYPE_DATA;
|
|
|
|
pkt->tag.stype = VIO_SUBTYPE_INFO;
|
|
|
|
pkt->tag.stype_env = VIO_DRING_DATA;
|
|
|
|
pkt->seq = dr->rcv_nxt;
|
2016-03-15 12:35:40 -06:00
|
|
|
pkt->start_idx = vio_dring_next(dr,
|
|
|
|
port->napi_stop_idx);
|
2016-03-15 12:35:37 -06:00
|
|
|
pkt->end_idx = -1;
|
2017-02-13 11:57:01 -07:00
|
|
|
} else {
|
|
|
|
err = ldc_read(vio->lp, &msgbuf, sizeof(msgbuf));
|
|
|
|
if (unlikely(err < 0)) {
|
|
|
|
if (err == -ECONNRESET)
|
|
|
|
vio_conn_reset(vio);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
if (err == 0)
|
|
|
|
break;
|
|
|
|
viodbg(DATA, "TAG [%02x:%02x:%04x:%08x]\n",
|
|
|
|
msgbuf.tag.type,
|
|
|
|
msgbuf.tag.stype,
|
|
|
|
msgbuf.tag.stype_env,
|
|
|
|
msgbuf.tag.sid);
|
|
|
|
err = vio_validate_sid(vio, &msgbuf.tag);
|
|
|
|
if (err < 0)
|
|
|
|
break;
|
2016-03-15 12:35:37 -06:00
|
|
|
}
|
2017-02-13 11:57:01 -07:00
|
|
|
|
2016-03-15 12:35:37 -06:00
|
|
|
if (likely(msgbuf.tag.type == VIO_TYPE_DATA)) {
|
|
|
|
if (msgbuf.tag.stype == VIO_SUBTYPE_INFO) {
|
2016-03-15 12:35:38 -06:00
|
|
|
if (!sunvnet_port_is_up_common(port)) {
|
2016-03-15 12:35:37 -06:00
|
|
|
/* failures like handshake_failure()
|
|
|
|
* may have cleaned up dring, but
|
|
|
|
* NAPI polling may bring us here.
|
|
|
|
*/
|
|
|
|
err = -ECONNRESET;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
err = vnet_rx(port, &msgbuf, &npkts, budget);
|
|
|
|
if (npkts >= budget)
|
|
|
|
break;
|
|
|
|
if (npkts == 0)
|
|
|
|
break;
|
|
|
|
} else if (msgbuf.tag.stype == VIO_SUBTYPE_ACK) {
|
|
|
|
err = vnet_ack(port, &msgbuf);
|
|
|
|
if (err > 0)
|
|
|
|
tx_wakeup |= err;
|
|
|
|
} else if (msgbuf.tag.stype == VIO_SUBTYPE_NACK) {
|
|
|
|
err = vnet_nack(port, &msgbuf);
|
|
|
|
}
|
|
|
|
} else if (msgbuf.tag.type == VIO_TYPE_CTRL) {
|
|
|
|
if (msgbuf.tag.stype_env == VNET_MCAST_INFO)
|
|
|
|
err = handle_mcast(port, &msgbuf);
|
|
|
|
else
|
|
|
|
err = vio_control_pkt_engine(vio, &msgbuf);
|
|
|
|
if (err)
|
|
|
|
break;
|
|
|
|
} else {
|
|
|
|
err = vnet_handle_unknown(port, &msgbuf);
|
|
|
|
}
|
|
|
|
if (err == -ECONNRESET)
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
if (unlikely(tx_wakeup && err != -ECONNRESET))
|
|
|
|
maybe_tx_wakeup(port);
|
|
|
|
return npkts;
|
|
|
|
}
|
|
|
|
|
|
|
|
int sunvnet_poll_common(struct napi_struct *napi, int budget)
|
|
|
|
{
|
|
|
|
struct vnet_port *port = container_of(napi, struct vnet_port, napi);
|
|
|
|
struct vio_driver_state *vio = &port->vio;
|
|
|
|
int processed = vnet_event_napi(port, budget);
|
|
|
|
|
|
|
|
if (processed < budget) {
|
2017-01-30 09:22:01 -07:00
|
|
|
napi_complete_done(napi, processed);
|
2016-03-15 12:35:37 -06:00
|
|
|
port->rx_event &= ~LDC_EVENT_DATA_READY;
|
|
|
|
vio_set_intr(vio->vdev->rx_ino, HV_INTR_ENABLED);
|
|
|
|
}
|
|
|
|
return processed;
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(sunvnet_poll_common);
|
|
|
|
|
|
|
|
void sunvnet_event_common(void *arg, int event)
|
|
|
|
{
|
|
|
|
struct vnet_port *port = arg;
|
|
|
|
struct vio_driver_state *vio = &port->vio;
|
|
|
|
|
|
|
|
port->rx_event |= event;
|
|
|
|
vio_set_intr(vio->vdev->rx_ino, HV_INTR_DISABLED);
|
|
|
|
napi_schedule(&port->napi);
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(sunvnet_event_common);
|
|
|
|
|
|
|
|
static int __vnet_tx_trigger(struct vnet_port *port, u32 start)
|
|
|
|
{
|
|
|
|
struct vio_dring_state *dr = &port->vio.drings[VIO_DRIVER_TX_RING];
|
|
|
|
struct vio_dring_data hdr = {
|
|
|
|
.tag = {
|
|
|
|
.type = VIO_TYPE_DATA,
|
|
|
|
.stype = VIO_SUBTYPE_INFO,
|
|
|
|
.stype_env = VIO_DRING_DATA,
|
|
|
|
.sid = vio_send_sid(&port->vio),
|
|
|
|
},
|
|
|
|
.dring_ident = dr->ident,
|
|
|
|
.start_idx = start,
|
2016-03-15 12:35:40 -06:00
|
|
|
.end_idx = (u32)-1,
|
2016-03-15 12:35:37 -06:00
|
|
|
};
|
|
|
|
int err, delay;
|
|
|
|
int retries = 0;
|
|
|
|
|
|
|
|
if (port->stop_rx) {
|
|
|
|
trace_vnet_tx_pending_stopped_ack(port->vio._local_sid,
|
|
|
|
port->vio._peer_sid,
|
|
|
|
port->stop_rx_idx, -1);
|
|
|
|
err = vnet_send_ack(port,
|
|
|
|
&port->vio.drings[VIO_DRIVER_RX_RING],
|
|
|
|
port->stop_rx_idx, -1,
|
|
|
|
VIO_DRING_STOPPED);
|
|
|
|
if (err <= 0)
|
|
|
|
return err;
|
|
|
|
}
|
|
|
|
|
|
|
|
hdr.seq = dr->snd_nxt;
|
|
|
|
delay = 1;
|
|
|
|
do {
|
|
|
|
err = vio_ldc_send(&port->vio, &hdr, sizeof(hdr));
|
|
|
|
if (err > 0) {
|
|
|
|
dr->snd_nxt++;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
udelay(delay);
|
|
|
|
if ((delay <<= 1) > 128)
|
|
|
|
delay = 128;
|
|
|
|
if (retries++ > VNET_MAX_RETRIES)
|
|
|
|
break;
|
|
|
|
} while (err == -EAGAIN);
|
|
|
|
trace_vnet_tx_trigger(port->vio._local_sid,
|
|
|
|
port->vio._peer_sid, start, err);
|
|
|
|
|
|
|
|
return err;
|
|
|
|
}
|
|
|
|
|
|
|
|
static struct sk_buff *vnet_clean_tx_ring(struct vnet_port *port,
|
|
|
|
unsigned *pending)
|
|
|
|
{
|
|
|
|
struct vio_dring_state *dr = &port->vio.drings[VIO_DRIVER_TX_RING];
|
|
|
|
struct sk_buff *skb = NULL;
|
|
|
|
int i, txi;
|
|
|
|
|
|
|
|
*pending = 0;
|
|
|
|
|
|
|
|
txi = dr->prod;
|
|
|
|
for (i = 0; i < VNET_TX_RING_SIZE; ++i) {
|
|
|
|
struct vio_net_desc *d;
|
|
|
|
|
|
|
|
--txi;
|
|
|
|
if (txi < 0)
|
2016-03-15 12:35:40 -06:00
|
|
|
txi = VNET_TX_RING_SIZE - 1;
|
2016-03-15 12:35:37 -06:00
|
|
|
|
|
|
|
d = vio_dring_entry(dr, txi);
|
|
|
|
|
|
|
|
if (d->hdr.state == VIO_DESC_READY) {
|
|
|
|
(*pending)++;
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
if (port->tx_bufs[txi].skb) {
|
|
|
|
if (d->hdr.state != VIO_DESC_DONE)
|
|
|
|
pr_notice("invalid ring buffer state %d\n",
|
|
|
|
d->hdr.state);
|
|
|
|
BUG_ON(port->tx_bufs[txi].skb->next);
|
|
|
|
|
|
|
|
port->tx_bufs[txi].skb->next = skb;
|
|
|
|
skb = port->tx_bufs[txi].skb;
|
|
|
|
port->tx_bufs[txi].skb = NULL;
|
|
|
|
|
|
|
|
ldc_unmap(port->vio.lp,
|
|
|
|
port->tx_bufs[txi].cookies,
|
|
|
|
port->tx_bufs[txi].ncookies);
|
2016-03-15 12:35:40 -06:00
|
|
|
} else if (d->hdr.state == VIO_DESC_FREE) {
|
2016-03-15 12:35:37 -06:00
|
|
|
break;
|
2016-03-15 12:35:40 -06:00
|
|
|
}
|
2016-03-15 12:35:37 -06:00
|
|
|
d->hdr.state = VIO_DESC_FREE;
|
|
|
|
}
|
|
|
|
return skb;
|
|
|
|
}
|
|
|
|
|
|
|
|
static inline void vnet_free_skbs(struct sk_buff *skb)
|
|
|
|
{
|
|
|
|
struct sk_buff *next;
|
|
|
|
|
|
|
|
while (skb) {
|
|
|
|
next = skb->next;
|
|
|
|
skb->next = NULL;
|
|
|
|
dev_kfree_skb(skb);
|
|
|
|
skb = next;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2017-10-16 18:29:28 -06:00
|
|
|
void sunvnet_clean_timer_expire_common(struct timer_list *t)
|
2016-03-15 12:35:37 -06:00
|
|
|
{
|
2017-10-16 18:29:28 -06:00
|
|
|
struct vnet_port *port = from_timer(port, t, clean_timer);
|
2016-03-15 12:35:37 -06:00
|
|
|
struct sk_buff *freeskbs;
|
|
|
|
unsigned pending;
|
|
|
|
|
2016-03-15 12:35:38 -06:00
|
|
|
netif_tx_lock(VNET_PORT_TO_NET_DEVICE(port));
|
2016-03-15 12:35:37 -06:00
|
|
|
freeskbs = vnet_clean_tx_ring(port, &pending);
|
2016-03-15 12:35:38 -06:00
|
|
|
netif_tx_unlock(VNET_PORT_TO_NET_DEVICE(port));
|
2016-03-15 12:35:37 -06:00
|
|
|
|
|
|
|
vnet_free_skbs(freeskbs);
|
|
|
|
|
|
|
|
if (pending)
|
|
|
|
(void)mod_timer(&port->clean_timer,
|
|
|
|
jiffies + VNET_CLEAN_TIMEOUT);
|
|
|
|
else
|
|
|
|
del_timer(&port->clean_timer);
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(sunvnet_clean_timer_expire_common);
|
|
|
|
|
|
|
|
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);
|
|
|
|
|
2016-03-15 12:35:40 -06:00
|
|
|
err = ldc_map_single(lp, skb->data - VNET_PACKET_SKIP, blen, cookies,
|
2016-03-15 12:35:37 -06:00
|
|
|
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 i, len, pad, docopy;
|
|
|
|
|
|
|
|
len = skb->len;
|
|
|
|
pad = 0;
|
|
|
|
if (len < ETH_ZLEN) {
|
|
|
|
pad += ETH_ZLEN - skb->len;
|
|
|
|
len += pad;
|
|
|
|
}
|
|
|
|
len += VNET_PACKET_SKIP;
|
|
|
|
pad += 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 || docopy) {
|
|
|
|
int start = 0, offset;
|
|
|
|
__wsum csum;
|
|
|
|
|
|
|
|
len = skb->len > ETH_ZLEN ? skb->len : ETH_ZLEN;
|
|
|
|
nskb = alloc_and_align_skb(skb->dev, len);
|
2016-03-15 12:35:40 -06:00
|
|
|
if (!nskb) {
|
2016-03-15 12:35:37 -06:00
|
|
|
dev_kfree_skb(skb);
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
skb_reserve(nskb, VNET_PACKET_SKIP);
|
|
|
|
|
|
|
|
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) {
|
|
|
|
int offset = start + nskb->csum_offset;
|
|
|
|
|
2017-07-06 17:57:10 -06:00
|
|
|
/* copy the headers, no csum here */
|
2016-03-15 12:35:37 -06:00
|
|
|
if (skb_copy_bits(skb, 0, nskb->data, start)) {
|
|
|
|
dev_kfree_skb(nskb);
|
|
|
|
dev_kfree_skb(skb);
|
|
|
|
return NULL;
|
|
|
|
}
|
2017-07-06 17:57:10 -06:00
|
|
|
|
|
|
|
/* copy the rest, with csum calculation */
|
2016-03-15 12:35:37 -06:00
|
|
|
*(__sum16 *)(skb->data + offset) = 0;
|
|
|
|
csum = skb_copy_and_csum_bits(skb, start,
|
|
|
|
nskb->data + start,
|
|
|
|
skb->len - start, 0);
|
2017-07-06 17:57:10 -06:00
|
|
|
|
|
|
|
/* add in the header checksums */
|
|
|
|
if (skb->protocol == htons(ETH_P_IP)) {
|
|
|
|
struct iphdr *iph = ip_hdr(nskb);
|
|
|
|
|
|
|
|
if (iph->protocol == IPPROTO_TCP ||
|
|
|
|
iph->protocol == IPPROTO_UDP) {
|
|
|
|
csum = csum_tcpudp_magic(iph->saddr,
|
|
|
|
iph->daddr,
|
|
|
|
skb->len - start,
|
|
|
|
iph->protocol,
|
|
|
|
csum);
|
|
|
|
}
|
|
|
|
} else if (skb->protocol == htons(ETH_P_IPV6)) {
|
|
|
|
struct ipv6hdr *ip6h = ipv6_hdr(nskb);
|
|
|
|
|
|
|
|
if (ip6h->nexthdr == IPPROTO_TCP ||
|
|
|
|
ip6h->nexthdr == IPPROTO_UDP) {
|
|
|
|
csum = csum_ipv6_magic(&ip6h->saddr,
|
|
|
|
&ip6h->daddr,
|
|
|
|
skb->len - start,
|
|
|
|
ip6h->nexthdr,
|
|
|
|
csum);
|
|
|
|
}
|
2016-03-15 12:35:37 -06:00
|
|
|
}
|
2017-07-06 17:57:10 -06:00
|
|
|
|
|
|
|
/* save the final result */
|
2016-03-15 12:35:37 -06:00
|
|
|
*(__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;
|
|
|
|
}
|
|
|
|
nskb->queue_mapping = skb->queue_mapping;
|
|
|
|
dev_kfree_skb(skb);
|
|
|
|
skb = nskb;
|
|
|
|
}
|
|
|
|
return skb;
|
|
|
|
}
|
|
|
|
|
2016-03-15 12:35:38 -06:00
|
|
|
static int vnet_handle_offloads(struct vnet_port *port, struct sk_buff *skb,
|
|
|
|
struct vnet_port *(*vnet_tx_port)
|
|
|
|
(struct sk_buff *, struct net_device *))
|
2016-03-15 12:35:37 -06:00
|
|
|
{
|
2016-03-15 12:35:38 -06:00
|
|
|
struct net_device *dev = VNET_PORT_TO_NET_DEVICE(port);
|
2016-03-15 12:35:37 -06:00
|
|
|
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;
|
|
|
|
|
2016-03-15 12:35:40 -06:00
|
|
|
if (proto == IPPROTO_TCP) {
|
2016-03-15 12:35:37 -06:00
|
|
|
hlen += tcp_hdr(skb)->doff * 4;
|
2016-03-15 12:35:40 -06:00
|
|
|
} else if (proto == IPPROTO_UDP) {
|
2016-03-15 12:35:37 -06:00
|
|
|
hlen += sizeof(struct udphdr);
|
2016-03-15 12:35:40 -06:00
|
|
|
} else {
|
2016-03-15 12:35:37 -06:00
|
|
|
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) {
|
|
|
|
if (skb_unclone(skb, GFP_ATOMIC))
|
|
|
|
goto out_dropped;
|
|
|
|
|
|
|
|
/* 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);
|
|
|
|
if (IS_ERR(segs))
|
|
|
|
goto out_dropped;
|
|
|
|
|
|
|
|
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);
|
2016-03-15 12:35:40 -06:00
|
|
|
} else {
|
2016-03-15 12:35:37 -06:00
|
|
|
skb_shinfo(curr)->gso_size = 0;
|
2016-03-15 12:35:40 -06:00
|
|
|
}
|
2016-03-15 12:35:37 -06:00
|
|
|
|
|
|
|
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))
|
2016-03-15 12:35:38 -06:00
|
|
|
status = sunvnet_start_xmit_common(curr, dev,
|
|
|
|
vnet_tx_port);
|
2016-03-15 12:35:37 -06:00
|
|
|
if (status & NETDEV_TX_MASK)
|
|
|
|
dev_kfree_skb_any(curr);
|
|
|
|
}
|
|
|
|
|
|
|
|
if (!(status & NETDEV_TX_MASK))
|
|
|
|
dev_kfree_skb_any(skb);
|
|
|
|
return status;
|
|
|
|
out_dropped:
|
|
|
|
dev->stats.tx_dropped++;
|
|
|
|
dev_kfree_skb_any(skb);
|
|
|
|
return NETDEV_TX_OK;
|
|
|
|
}
|
|
|
|
|
2016-03-15 12:35:38 -06:00
|
|
|
int sunvnet_start_xmit_common(struct sk_buff *skb, struct net_device *dev,
|
|
|
|
struct vnet_port *(*vnet_tx_port)
|
|
|
|
(struct sk_buff *, struct net_device *))
|
2016-03-15 12:35:37 -06:00
|
|
|
{
|
|
|
|
struct vnet_port *port = NULL;
|
|
|
|
struct vio_dring_state *dr;
|
|
|
|
struct vio_net_desc *d;
|
|
|
|
unsigned int len;
|
|
|
|
struct sk_buff *freeskbs = NULL;
|
|
|
|
int i, err, txi;
|
|
|
|
unsigned pending = 0;
|
|
|
|
struct netdev_queue *txq;
|
|
|
|
|
|
|
|
rcu_read_lock();
|
2016-03-15 12:35:38 -06:00
|
|
|
port = vnet_tx_port(skb, dev);
|
2017-02-13 11:57:02 -07:00
|
|
|
if (unlikely(!port))
|
2016-03-15 12:35:37 -06:00
|
|
|
goto out_dropped;
|
|
|
|
|
|
|
|
if (skb_is_gso(skb) && skb->len > port->tsolen) {
|
2016-03-15 12:35:38 -06:00
|
|
|
err = vnet_handle_offloads(port, skb, vnet_tx_port);
|
2016-03-15 12:35:37 -06:00
|
|
|
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))
|
|
|
|
localmtu -= VLAN_HLEN;
|
|
|
|
|
|
|
|
if (skb->protocol == htons(ETH_P_IP)) {
|
|
|
|
struct flowi4 fl4;
|
|
|
|
struct rtable *rt = NULL;
|
|
|
|
|
|
|
|
memset(&fl4, 0, sizeof(fl4));
|
|
|
|
fl4.flowi4_oif = dev->ifindex;
|
|
|
|
fl4.flowi4_tos = RT_TOS(ip_hdr(skb)->tos);
|
|
|
|
fl4.daddr = ip_hdr(skb)->daddr;
|
|
|
|
fl4.saddr = ip_hdr(skb)->saddr;
|
|
|
|
|
|
|
|
rt = ip_route_output_key(dev_net(dev), &fl4);
|
|
|
|
if (!IS_ERR(rt)) {
|
|
|
|
skb_dst_set(skb, &rt->dst);
|
|
|
|
icmp_send(skb, ICMP_DEST_UNREACH,
|
|
|
|
ICMP_FRAG_NEEDED,
|
|
|
|
htonl(localmtu));
|
|
|
|
}
|
|
|
|
}
|
|
|
|
#if IS_ENABLED(CONFIG_IPV6)
|
|
|
|
else if (skb->protocol == htons(ETH_P_IPV6))
|
|
|
|
icmpv6_send(skb, ICMPV6_PKT_TOOBIG, 0, localmtu);
|
|
|
|
#endif
|
|
|
|
goto out_dropped;
|
|
|
|
}
|
|
|
|
|
|
|
|
skb = vnet_skb_shape(skb, 2);
|
|
|
|
|
|
|
|
if (unlikely(!skb))
|
|
|
|
goto out_dropped;
|
|
|
|
|
2017-07-06 17:57:10 -06:00
|
|
|
if (skb->ip_summed == CHECKSUM_PARTIAL) {
|
|
|
|
if (skb->protocol == htons(ETH_P_IP))
|
|
|
|
vnet_fullcsum_ipv4(skb);
|
|
|
|
#if IS_ENABLED(CONFIG_IPV6)
|
|
|
|
else if (skb->protocol == htons(ETH_P_IPV6))
|
|
|
|
vnet_fullcsum_ipv6(skb);
|
|
|
|
#endif
|
|
|
|
}
|
2016-03-15 12:35:37 -06:00
|
|
|
|
|
|
|
dr = &port->vio.drings[VIO_DRIVER_TX_RING];
|
|
|
|
i = skb_get_queue_mapping(skb);
|
|
|
|
txq = netdev_get_tx_queue(dev, i);
|
|
|
|
if (unlikely(vnet_tx_dring_avail(dr) < 1)) {
|
|
|
|
if (!netif_tx_queue_stopped(txq)) {
|
|
|
|
netif_tx_stop_queue(txq);
|
|
|
|
|
|
|
|
/* This is a hard error, log it. */
|
|
|
|
netdev_err(dev, "BUG! Tx Ring full when queue awake!\n");
|
|
|
|
dev->stats.tx_errors++;
|
|
|
|
}
|
|
|
|
rcu_read_unlock();
|
|
|
|
return NETDEV_TX_BUSY;
|
|
|
|
}
|
|
|
|
|
|
|
|
d = vio_dring_cur(dr);
|
|
|
|
|
|
|
|
txi = dr->prod;
|
|
|
|
|
|
|
|
freeskbs = vnet_clean_tx_ring(port, &pending);
|
|
|
|
|
|
|
|
BUG_ON(port->tx_bufs[txi].skb);
|
|
|
|
|
|
|
|
len = skb->len;
|
|
|
|
if (len < ETH_ZLEN)
|
|
|
|
len = ETH_ZLEN;
|
|
|
|
|
|
|
|
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(),
|
|
|
|
* thus it is safe to not set VIO_ACK_ENABLE for each transmission:
|
|
|
|
* the protocol itself does not require it as long as the peer
|
|
|
|
* sends a VIO_SUBTYPE_ACK for VIO_DRING_STOPPED.
|
|
|
|
*
|
|
|
|
* An ACK for every packet in the ring is expensive as the
|
|
|
|
* sending of LDC messages is slow and affects performance.
|
|
|
|
*/
|
|
|
|
d->hdr.ack = VIO_ACK_DISABLE;
|
|
|
|
d->size = len;
|
|
|
|
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.
|
|
|
|
*/
|
|
|
|
dma_wmb();
|
|
|
|
|
|
|
|
d->hdr.state = VIO_DESC_READY;
|
|
|
|
|
|
|
|
/* Exactly one ldc "start" trigger (for dr->cons) needs to be sent
|
|
|
|
* to notify the consumer that some descriptors are READY.
|
|
|
|
* After that "start" trigger, no additional triggers are needed until
|
|
|
|
* a DRING_STOPPED is received from the consumer. The dr->cons field
|
|
|
|
* (set up by vnet_ack()) has the value of the next dring index
|
|
|
|
* that has not yet been ack-ed. We send a "start" trigger here
|
|
|
|
* if, and only if, start_cons is true (reset it afterward). Conversely,
|
|
|
|
* vnet_ack() should check if the dring corresponding to cons
|
|
|
|
* is marked READY, but start_cons was false.
|
|
|
|
* If so, vnet_ack() should send out the missed "start" trigger.
|
|
|
|
*
|
|
|
|
* Note that the dma_wmb() above makes sure the cookies et al. are
|
|
|
|
* not globally visible before the VIO_DESC_READY, and that the
|
|
|
|
* stores are ordered correctly by the compiler. The consumer will
|
|
|
|
* not proceed until the VIO_DESC_READY is visible assuring that
|
|
|
|
* the consumer does not observe anything related to descriptors
|
|
|
|
* out of order. The HV trap from the LDC start trigger is the
|
|
|
|
* producer to consumer announcement that work is available to the
|
|
|
|
* consumer
|
|
|
|
*/
|
|
|
|
if (!port->start_cons) { /* previous trigger suffices */
|
|
|
|
trace_vnet_skip_tx_trigger(port->vio._local_sid,
|
|
|
|
port->vio._peer_sid, dr->cons);
|
|
|
|
goto ldc_start_done;
|
|
|
|
}
|
|
|
|
|
|
|
|
err = __vnet_tx_trigger(port, dr->cons);
|
|
|
|
if (unlikely(err < 0)) {
|
|
|
|
netdev_info(dev, "TX trigger error %d\n", err);
|
|
|
|
d->hdr.state = VIO_DESC_FREE;
|
|
|
|
skb = port->tx_bufs[txi].skb;
|
|
|
|
port->tx_bufs[txi].skb = NULL;
|
|
|
|
dev->stats.tx_carrier_errors++;
|
|
|
|
goto out_dropped;
|
|
|
|
}
|
|
|
|
|
|
|
|
ldc_start_done:
|
|
|
|
port->start_cons = false;
|
|
|
|
|
|
|
|
dev->stats.tx_packets++;
|
|
|
|
dev->stats.tx_bytes += port->tx_bufs[txi].skb->len;
|
2017-03-14 11:24:40 -06:00
|
|
|
port->stats.tx_packets++;
|
|
|
|
port->stats.tx_bytes += port->tx_bufs[txi].skb->len;
|
2016-03-15 12:35:37 -06:00
|
|
|
|
|
|
|
dr->prod = (dr->prod + 1) & (VNET_TX_RING_SIZE - 1);
|
|
|
|
if (unlikely(vnet_tx_dring_avail(dr) < 1)) {
|
|
|
|
netif_tx_stop_queue(txq);
|
2017-02-13 11:57:00 -07:00
|
|
|
smp_rmb();
|
2016-03-15 12:35:37 -06:00
|
|
|
if (vnet_tx_dring_avail(dr) > VNET_TX_WAKEUP_THRESH(dr))
|
|
|
|
netif_tx_wake_queue(txq);
|
|
|
|
}
|
|
|
|
|
|
|
|
(void)mod_timer(&port->clean_timer, jiffies + VNET_CLEAN_TIMEOUT);
|
|
|
|
rcu_read_unlock();
|
|
|
|
|
|
|
|
vnet_free_skbs(freeskbs);
|
|
|
|
|
|
|
|
return NETDEV_TX_OK;
|
|
|
|
|
|
|
|
out_dropped:
|
|
|
|
if (pending)
|
|
|
|
(void)mod_timer(&port->clean_timer,
|
|
|
|
jiffies + VNET_CLEAN_TIMEOUT);
|
|
|
|
else if (port)
|
|
|
|
del_timer(&port->clean_timer);
|
2017-02-13 11:57:02 -07:00
|
|
|
rcu_read_unlock();
|
2016-03-15 12:35:37 -06:00
|
|
|
if (skb)
|
|
|
|
dev_kfree_skb(skb);
|
|
|
|
vnet_free_skbs(freeskbs);
|
|
|
|
dev->stats.tx_dropped++;
|
|
|
|
return NETDEV_TX_OK;
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(sunvnet_start_xmit_common);
|
|
|
|
|
|
|
|
void sunvnet_tx_timeout_common(struct net_device *dev)
|
|
|
|
{
|
|
|
|
/* XXX Implement me XXX */
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(sunvnet_tx_timeout_common);
|
|
|
|
|
|
|
|
int sunvnet_open_common(struct net_device *dev)
|
|
|
|
{
|
|
|
|
netif_carrier_on(dev);
|
|
|
|
netif_tx_start_all_queues(dev);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(sunvnet_open_common);
|
|
|
|
|
|
|
|
int sunvnet_close_common(struct net_device *dev)
|
|
|
|
{
|
|
|
|
netif_tx_stop_all_queues(dev);
|
|
|
|
netif_carrier_off(dev);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(sunvnet_close_common);
|
|
|
|
|
|
|
|
static struct vnet_mcast_entry *__vnet_mc_find(struct vnet *vp, u8 *addr)
|
|
|
|
{
|
|
|
|
struct vnet_mcast_entry *m;
|
|
|
|
|
|
|
|
for (m = vp->mcast_list; m; m = m->next) {
|
|
|
|
if (ether_addr_equal(m->addr, addr))
|
|
|
|
return m;
|
|
|
|
}
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void __update_mc_list(struct vnet *vp, struct net_device *dev)
|
|
|
|
{
|
|
|
|
struct netdev_hw_addr *ha;
|
|
|
|
|
|
|
|
netdev_for_each_mc_addr(ha, dev) {
|
|
|
|
struct vnet_mcast_entry *m;
|
|
|
|
|
|
|
|
m = __vnet_mc_find(vp, ha->addr);
|
|
|
|
if (m) {
|
|
|
|
m->hit = 1;
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (!m) {
|
|
|
|
m = kzalloc(sizeof(*m), GFP_ATOMIC);
|
|
|
|
if (!m)
|
|
|
|
continue;
|
|
|
|
memcpy(m->addr, ha->addr, ETH_ALEN);
|
|
|
|
m->hit = 1;
|
|
|
|
|
|
|
|
m->next = vp->mcast_list;
|
|
|
|
vp->mcast_list = m;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
static void __send_mc_list(struct vnet *vp, struct vnet_port *port)
|
|
|
|
{
|
|
|
|
struct vio_net_mcast_info info;
|
|
|
|
struct vnet_mcast_entry *m, **pp;
|
|
|
|
int n_addrs;
|
|
|
|
|
|
|
|
memset(&info, 0, sizeof(info));
|
|
|
|
|
|
|
|
info.tag.type = VIO_TYPE_CTRL;
|
|
|
|
info.tag.stype = VIO_SUBTYPE_INFO;
|
|
|
|
info.tag.stype_env = VNET_MCAST_INFO;
|
|
|
|
info.tag.sid = vio_send_sid(&port->vio);
|
|
|
|
info.set = 1;
|
|
|
|
|
|
|
|
n_addrs = 0;
|
|
|
|
for (m = vp->mcast_list; m; m = m->next) {
|
|
|
|
if (m->sent)
|
|
|
|
continue;
|
|
|
|
m->sent = 1;
|
|
|
|
memcpy(&info.mcast_addr[n_addrs * ETH_ALEN],
|
|
|
|
m->addr, ETH_ALEN);
|
|
|
|
if (++n_addrs == VNET_NUM_MCAST) {
|
|
|
|
info.count = n_addrs;
|
|
|
|
|
2016-03-15 12:35:40 -06:00
|
|
|
(void)vio_ldc_send(&port->vio, &info,
|
|
|
|
sizeof(info));
|
2016-03-15 12:35:37 -06:00
|
|
|
n_addrs = 0;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
if (n_addrs) {
|
|
|
|
info.count = n_addrs;
|
2016-03-15 12:35:40 -06:00
|
|
|
(void)vio_ldc_send(&port->vio, &info, sizeof(info));
|
2016-03-15 12:35:37 -06:00
|
|
|
}
|
|
|
|
|
|
|
|
info.set = 0;
|
|
|
|
|
|
|
|
n_addrs = 0;
|
|
|
|
pp = &vp->mcast_list;
|
|
|
|
while ((m = *pp) != NULL) {
|
|
|
|
if (m->hit) {
|
|
|
|
m->hit = 0;
|
|
|
|
pp = &m->next;
|
|
|
|
continue;
|
|
|
|
}
|
|
|
|
|
|
|
|
memcpy(&info.mcast_addr[n_addrs * ETH_ALEN],
|
|
|
|
m->addr, ETH_ALEN);
|
|
|
|
if (++n_addrs == VNET_NUM_MCAST) {
|
|
|
|
info.count = n_addrs;
|
2016-03-15 12:35:40 -06:00
|
|
|
(void)vio_ldc_send(&port->vio, &info,
|
|
|
|
sizeof(info));
|
2016-03-15 12:35:37 -06:00
|
|
|
n_addrs = 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
*pp = m->next;
|
|
|
|
kfree(m);
|
|
|
|
}
|
|
|
|
if (n_addrs) {
|
|
|
|
info.count = n_addrs;
|
2016-03-15 12:35:40 -06:00
|
|
|
(void)vio_ldc_send(&port->vio, &info, sizeof(info));
|
2016-03-15 12:35:37 -06:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2016-03-15 12:35:38 -06:00
|
|
|
void sunvnet_set_rx_mode_common(struct net_device *dev, struct vnet *vp)
|
2016-03-15 12:35:37 -06:00
|
|
|
{
|
|
|
|
struct vnet_port *port;
|
|
|
|
|
|
|
|
rcu_read_lock();
|
|
|
|
list_for_each_entry_rcu(port, &vp->port_list, list) {
|
|
|
|
if (port->switch_port) {
|
|
|
|
__update_mc_list(vp, dev);
|
|
|
|
__send_mc_list(vp, port);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
rcu_read_unlock();
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(sunvnet_set_rx_mode_common);
|
|
|
|
|
|
|
|
int sunvnet_set_mac_addr_common(struct net_device *dev, void *p)
|
|
|
|
{
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(sunvnet_set_mac_addr_common);
|
|
|
|
|
|
|
|
void sunvnet_port_free_tx_bufs_common(struct vnet_port *port)
|
|
|
|
{
|
|
|
|
struct vio_dring_state *dr;
|
|
|
|
int i;
|
|
|
|
|
|
|
|
dr = &port->vio.drings[VIO_DRIVER_TX_RING];
|
|
|
|
|
2016-03-15 12:35:40 -06:00
|
|
|
if (!dr->base)
|
2016-03-15 12:35:37 -06:00
|
|
|
return;
|
|
|
|
|
|
|
|
for (i = 0; i < VNET_TX_RING_SIZE; i++) {
|
|
|
|
struct vio_net_desc *d;
|
|
|
|
void *skb = port->tx_bufs[i].skb;
|
|
|
|
|
|
|
|
if (!skb)
|
|
|
|
continue;
|
|
|
|
|
|
|
|
d = vio_dring_entry(dr, i);
|
|
|
|
|
|
|
|
ldc_unmap(port->vio.lp,
|
|
|
|
port->tx_bufs[i].cookies,
|
|
|
|
port->tx_bufs[i].ncookies);
|
|
|
|
dev_kfree_skb(skb);
|
|
|
|
port->tx_bufs[i].skb = NULL;
|
|
|
|
d->hdr.state = VIO_DESC_FREE;
|
|
|
|
}
|
|
|
|
ldc_free_exp_dring(port->vio.lp, dr->base,
|
|
|
|
(dr->entry_size * dr->num_entries),
|
|
|
|
dr->cookies, dr->ncookies);
|
|
|
|
dr->base = NULL;
|
|
|
|
dr->entry_size = 0;
|
|
|
|
dr->num_entries = 0;
|
|
|
|
dr->pending = 0;
|
|
|
|
dr->ncookies = 0;
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(sunvnet_port_free_tx_bufs_common);
|
|
|
|
|
2017-03-14 11:24:39 -06:00
|
|
|
void vnet_port_reset(struct vnet_port *port)
|
2016-03-15 12:35:37 -06:00
|
|
|
{
|
|
|
|
del_timer(&port->clean_timer);
|
|
|
|
sunvnet_port_free_tx_bufs_common(port);
|
|
|
|
port->rmtu = 0;
|
2017-02-13 11:57:04 -07:00
|
|
|
port->tso = (port->vsw == 0); /* no tso in vsw, misbehaves in bridge */
|
2016-03-15 12:35:37 -06:00
|
|
|
port->tsolen = 0;
|
|
|
|
}
|
2017-03-14 11:24:39 -06:00
|
|
|
EXPORT_SYMBOL_GPL(vnet_port_reset);
|
2016-03-15 12:35:37 -06:00
|
|
|
|
|
|
|
static int vnet_port_alloc_tx_ring(struct vnet_port *port)
|
|
|
|
{
|
|
|
|
struct vio_dring_state *dr;
|
|
|
|
unsigned long len, elen;
|
|
|
|
int i, err, ncookies;
|
|
|
|
void *dring;
|
|
|
|
|
|
|
|
dr = &port->vio.drings[VIO_DRIVER_TX_RING];
|
|
|
|
|
|
|
|
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,
|
|
|
|
dr->cookies, &ncookies,
|
|
|
|
(LDC_MAP_SHADOW |
|
|
|
|
LDC_MAP_DIRECT |
|
|
|
|
LDC_MAP_RW));
|
|
|
|
if (IS_ERR(dring)) {
|
|
|
|
err = PTR_ERR(dring);
|
|
|
|
goto err_out;
|
|
|
|
}
|
|
|
|
|
|
|
|
dr->base = dring;
|
|
|
|
dr->entry_size = elen;
|
|
|
|
dr->num_entries = VNET_TX_RING_SIZE;
|
2016-03-15 12:35:40 -06:00
|
|
|
dr->prod = 0;
|
|
|
|
dr->cons = 0;
|
2016-03-15 12:35:37 -06:00
|
|
|
port->start_cons = true; /* need an initial trigger */
|
|
|
|
dr->pending = VNET_TX_RING_SIZE;
|
|
|
|
dr->ncookies = ncookies;
|
|
|
|
|
|
|
|
for (i = 0; i < VNET_TX_RING_SIZE; ++i) {
|
|
|
|
struct vio_net_desc *d;
|
|
|
|
|
|
|
|
d = vio_dring_entry(dr, i);
|
|
|
|
d->hdr.state = VIO_DESC_FREE;
|
|
|
|
}
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
err_out:
|
|
|
|
sunvnet_port_free_tx_bufs_common(port);
|
|
|
|
|
|
|
|
return err;
|
|
|
|
}
|
|
|
|
|
|
|
|
#ifdef CONFIG_NET_POLL_CONTROLLER
|
2016-03-15 12:35:38 -06:00
|
|
|
void sunvnet_poll_controller_common(struct net_device *dev, struct vnet *vp)
|
2016-03-15 12:35:37 -06:00
|
|
|
{
|
|
|
|
struct vnet_port *port;
|
|
|
|
unsigned long flags;
|
|
|
|
|
|
|
|
spin_lock_irqsave(&vp->lock, flags);
|
|
|
|
if (!list_empty(&vp->port_list)) {
|
|
|
|
port = list_entry(vp->port_list.next, struct vnet_port, list);
|
|
|
|
napi_schedule(&port->napi);
|
|
|
|
}
|
|
|
|
spin_unlock_irqrestore(&vp->lock, flags);
|
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(sunvnet_poll_controller_common);
|
|
|
|
#endif
|
|
|
|
|
|
|
|
void sunvnet_port_add_txq_common(struct vnet_port *port)
|
|
|
|
{
|
|
|
|
struct vnet *vp = port->vp;
|
2017-03-14 11:24:41 -06:00
|
|
|
int smallest = 0;
|
|
|
|
int i;
|
|
|
|
|
|
|
|
/* find the first least-used q
|
|
|
|
* When there are more ldoms than q's, we start to
|
|
|
|
* double up on ports per queue.
|
|
|
|
*/
|
|
|
|
for (i = 0; i < VNET_MAX_TXQS; i++) {
|
|
|
|
if (vp->q_used[i] == 0) {
|
|
|
|
smallest = i;
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
if (vp->q_used[i] < vp->q_used[smallest])
|
|
|
|
smallest = i;
|
|
|
|
}
|
2016-03-15 12:35:37 -06:00
|
|
|
|
2017-03-14 11:24:41 -06:00
|
|
|
vp->nports++;
|
|
|
|
vp->q_used[smallest]++;
|
|
|
|
port->q_index = smallest;
|
2016-03-15 12:35:37 -06:00
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(sunvnet_port_add_txq_common);
|
|
|
|
|
|
|
|
void sunvnet_port_rm_txq_common(struct vnet_port *port)
|
|
|
|
{
|
|
|
|
port->vp->nports--;
|
2017-03-14 11:24:41 -06:00
|
|
|
port->vp->q_used[port->q_index]--;
|
|
|
|
port->q_index = 0;
|
2016-03-15 12:35:37 -06:00
|
|
|
}
|
|
|
|
EXPORT_SYMBOL_GPL(sunvnet_port_rm_txq_common);
|