| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Aaron Young | 8853 | 92.65% | 4 | 23.53% |
| Shannon Nelson | 685 | 7.17% | 10 | 58.82% |
| Kees Cook | 12 | 0.13% | 1 | 5.88% |
| Eric Dumazet | 3 | 0.03% | 1 | 5.88% |
| Yue haibing | 2 | 0.02% | 1 | 5.88% |
| Total | 9555 | 17 |
// SPDX-License-Identifier: GPL-2.0 /* sunvnet.c: Sun LDOM Virtual Network Driver. * * Copyright (C) 2007, 2008 David S. Miller <davem@davemloft.net> * Copyright (C) 2016-2017 Oracle. All rights reserved. */ #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 MODULE_AUTHOR("David S. Miller (davem@davemloft.net)"); MODULE_DESCRIPTION("Sun LDOM virtual network support library"); MODULE_LICENSE("GPL"); MODULE_VERSION("1.1"); 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); struct net_device *dev = VNET_PORT_TO_NET_DEVICE(port); 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; port->tsolen = 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; 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; (void)vio_ldc_send(vio, pkt, sizeof(*pkt)); return -ECONNRESET; } 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)); } 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]; dr->rcv_nxt = 1; dr->snd_nxt = 1; dr = &vio->drings[VIO_DRIVER_TX_RING]; dr->rcv_nxt = 1; dr->snd_nxt = 1; } 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) { struct sk_buff *skb; unsigned long addr, off; skb = netdev_alloc_skb(dev, len + VNET_PACKET_SKIP + 8 + 8); if (unlikely(!skb)) return NULL; addr = (unsigned long)skb->data; off = ((addr + 7UL) & ~7UL) - addr; if (off) skb_reserve(skb, off); return skb; } static inline void vnet_fullcsum_ipv4(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); } } #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 static int vnet_rx_one(struct vnet_port *port, struct vio_net_desc *desc) { struct net_device *dev = VNET_PORT_TO_NET_DEVICE(port); 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); 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 } } 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; if (unlikely(is_multicast_ether_addr(eth_hdr(skb)->h_dest))) dev->stats.multicast++; dev->stats.rx_packets++; dev->stats.rx_bytes += len; port->stats.rx_packets++; port->stats.rx_bytes += len; 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; BUG_ON(!desc); 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; end = (end == (u32)-1) ? vio_dring_prev(dr, start) : vio_dring_next(dr, end); 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); 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; } } if (unlikely(ack_start == -1)) { ack_end = vio_dring_prev(dr, start); ack_start = ack_end; } 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; dev = VNET_PORT_TO_NET_DEVICE(port); 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; struct net_device *dev = VNET_PORT_TO_NET_DEVICE(port); if (pkt->tag.stype != VIO_SUBTYPE_ACK) pr_err("%s: Got unexpected MCAST reply [%02x:%02x:%04x:%08x]\n", dev->name, pkt->tag.type, pkt->tag.stype, pkt->tag.stype_env, pkt->tag.sid); return 0; } /* If the queue is stopped, wake it up so that we'll * send out another START message at the next TX. */ static void maybe_tx_wakeup(struct vnet_port *port) { struct netdev_queue *txq; txq = netdev_get_tx_queue(VNET_PORT_TO_NET_DEVICE(port), port->q_index); __netif_tx_lock(txq, smp_processor_id()); if (likely(netif_tx_queue_stopped(txq))) netif_tx_wake_queue(txq); __netif_tx_unlock(txq); } bool sunvnet_port_is_up_common(struct vnet_port *vnet) { struct vio_driver_state *vio = &vnet->vio; return !!(vio->hs_state & VIO_HS_COMPLETE); } EXPORT_SYMBOL_GPL(sunvnet_port_is_up_common); static int vnet_event_napi(struct vnet_port *port, int budget) { struct net_device *dev = VNET_PORT_TO_NET_DEVICE(port); struct vio_driver_state *vio = &port->vio; int tx_wakeup, err; int npkts = 0; /* 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) { /* a link went down */ if (port->vsw == 1) { netif_tx_stop_all_queues(dev); netif_carrier_off(dev); } 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); port->rx_event = 0; port->stats.event_reset++; return 0; } if (port->rx_event & LDC_EVENT_UP) { /* a link came up */ if (port->vsw == 1) { netif_carrier_on(port->dev); netif_tx_start_all_queues(port->dev); } vio_link_state_change(vio, LDC_EVENT_UP); port->rx_event = 0; port->stats.event_up++; return 0; } err = 0; tx_wakeup = 0; 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; pkt->start_idx = vio_dring_next(dr, port->napi_stop_idx); pkt->end_idx = -1; } 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; } if (likely(msgbuf.tag.type == VIO_TYPE_DATA)) { if (msgbuf.tag.stype == VIO_SUBTYPE_INFO) { if (!sunvnet_port_is_up_common(port)) { /* 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) { napi_complete_done(napi, processed); 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, .end_idx = (u32)-1, }; 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) txi = VNET_TX_RING_SIZE - 1; 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); } else if (d->hdr.state == VIO_DESC_FREE) { break; } 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; } } void sunvnet_clean_timer_expire_common(struct timer_list *t) { struct vnet_port *port = from_timer(port, t, clean_timer); struct sk_buff *freeskbs; unsigned pending; netif_tx_lock(VNET_PORT_TO_NET_DEVICE(port)); freeskbs = vnet_clean_tx_ring(port, &pending); netif_tx_unlock(VNET_PORT_TO_NET_DEVICE(port)); 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); 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 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); if (!nskb) { 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; /* copy the headers, no csum here */ if (skb_copy_bits(skb, 0, nskb->data, start)) { dev_kfree_skb(nskb); dev_kfree_skb(skb); return NULL; } /* copy the rest, with csum calculation */ *(__sum16 *)(skb->data + offset) = 0; csum = skb_copy_and_csum_bits(skb, start, nskb->data + start, skb->len - start, 0); /* 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); } } /* save the final result */ *(__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; } static netdev_tx_t vnet_handle_offloads(struct vnet_port *port, struct sk_buff *skb, struct vnet_port *(*vnet_tx_port) (struct sk_buff *, struct net_device *)) { struct net_device *dev = VNET_PORT_TO_NET_DEVICE(port); 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) { 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); } 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 = sunvnet_start_xmit_common(curr, dev, vnet_tx_port); 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; } netdev_tx_t sunvnet_start_xmit_common(struct sk_buff *skb, struct net_device *dev, struct vnet_port *(*vnet_tx_port) (struct sk_buff *, struct net_device *)) { 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(); port = vnet_tx_port(skb, dev); if (unlikely(!port)) goto out_dropped; if (skb_is_gso(skb) && skb->len > port->tsolen) { err = vnet_handle_offloads(port, skb, vnet_tx_port); 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; 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 } 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; port->stats.tx_packets++; port->stats.tx_bytes += port->tx_bufs[txi].skb->len; dr->prod = (dr->prod + 1) & (VNET_TX_RING_SIZE - 1); if (unlikely(vnet_tx_dring_avail(dr) < 1)) { netif_tx_stop_queue(txq); smp_rmb(); 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); rcu_read_unlock(); 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; (void)vio_ldc_send(&port->vio, &info, sizeof(info)); n_addrs = 0; } } if (n_addrs) { info.count = n_addrs; (void)vio_ldc_send(&port->vio, &info, sizeof(info)); } 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; (void)vio_ldc_send(&port->vio, &info, sizeof(info)); n_addrs = 0; } *pp = m->next; kfree(m); } if (n_addrs) { info.count = n_addrs; (void)vio_ldc_send(&port->vio, &info, sizeof(info)); } } void sunvnet_set_rx_mode_common(struct net_device *dev, struct vnet *vp) { 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]; if (!dr->base) 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); void vnet_port_reset(struct vnet_port *port) { del_timer(&port->clean_timer); sunvnet_port_free_tx_bufs_common(port); port->rmtu = 0; port->tso = (port->vsw == 0); /* no tso in vsw, misbehaves in bridge */ port->tsolen = 0; } EXPORT_SYMBOL_GPL(vnet_port_reset); 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; dr->prod = 0; dr->cons = 0; 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 void sunvnet_poll_controller_common(struct net_device *dev, struct vnet *vp) { 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; 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; } vp->nports++; vp->q_used[smallest]++; port->q_index = smallest; } EXPORT_SYMBOL_GPL(sunvnet_port_add_txq_common); void sunvnet_port_rm_txq_common(struct vnet_port *port) { port->vp->nports--; port->vp->q_used[port->q_index]--; port->q_index = 0; } EXPORT_SYMBOL_GPL(sunvnet_port_rm_txq_common);
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