sunvnet: add VIO v1.7 and v1.8 support
This patch adds support for VIO v1.7 (extended descriptor format) and v1.8 (receive-side checksumming) to the sunvnet driver. Signed-off-by: David L Stevens <david.stevens@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David L Stevens
David S. Miller
Родитель
d6732489f0
Коммит
6d0ba91991
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@ -247,6 +247,25 @@ struct vio_net_desc {
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struct ldc_trans_cookie cookies[0];
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};
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struct vio_net_dext {
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u8 flags;
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#define VNET_PKT_HASH 0x01
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#define VNET_PKT_HCK_IPV4_HDRCKSUM 0x02
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#define VNET_PKT_HCK_FULLCKSUM 0x04
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#define VNET_PKT_IPV4_LSO 0x08
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#define VNET_PKT_HCK_IPV4_HDRCKSUM_OK 0x10
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#define VNET_PKT_HCK_FULLCKSUM_OK 0x20
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u8 vnet_hashval;
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u16 ipv4_lso_mss;
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u32 resv3;
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};
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static inline struct vio_net_dext *vio_net_ext(struct vio_net_desc *desc)
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{
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return (struct vio_net_dext *)&desc->cookies[2];
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}
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#define VIO_MAX_RING_COOKIES 24
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struct vio_dring_state {
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@ -21,6 +21,7 @@
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#include <linux/icmpv6.h>
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#endif
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#include <net/ip.h>
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#include <net/icmp.h>
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#include <net/route.h>
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@ -51,6 +52,8 @@ static int __vnet_tx_trigger(struct vnet_port *port, u32 start);
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/* Ordered from largest major to lowest */
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static struct vio_version vnet_versions[] = {
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{ .major = 1, .minor = 8 },
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{ .major = 1, .minor = 7 },
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{ .major = 1, .minor = 6 },
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{ .major = 1, .minor = 0 },
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};
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@ -282,10 +285,42 @@ static struct sk_buff *alloc_and_align_skb(struct net_device *dev,
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return skb;
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}
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static int vnet_rx_one(struct vnet_port *port, unsigned int len,
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struct ldc_trans_cookie *cookies, int ncookies)
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static inline void vnet_fullcsum(struct sk_buff *skb)
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{
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struct iphdr *iph = ip_hdr(skb);
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int offset = skb_transport_offset(skb);
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if (skb->protocol != htons(ETH_P_IP))
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return;
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if (iph->protocol != IPPROTO_TCP &&
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iph->protocol != IPPROTO_UDP)
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return;
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skb->ip_summed = CHECKSUM_NONE;
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skb->csum_level = 1;
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skb->csum = 0;
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if (iph->protocol == IPPROTO_TCP) {
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struct tcphdr *ptcp = tcp_hdr(skb);
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ptcp->check = 0;
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skb->csum = skb_checksum(skb, offset, skb->len - offset, 0);
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ptcp->check = csum_tcpudp_magic(iph->saddr, iph->daddr,
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skb->len - offset, IPPROTO_TCP,
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skb->csum);
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} else if (iph->protocol == IPPROTO_UDP) {
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struct udphdr *pudp = udp_hdr(skb);
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pudp->check = 0;
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skb->csum = skb_checksum(skb, offset, skb->len - offset, 0);
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pudp->check = csum_tcpudp_magic(iph->saddr, iph->daddr,
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skb->len - offset, IPPROTO_UDP,
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skb->csum);
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}
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}
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static int vnet_rx_one(struct vnet_port *port, struct vio_net_desc *desc)
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{
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struct net_device *dev = port->vp->dev;
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unsigned int len = desc->size;
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unsigned int copy_len;
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struct sk_buff *skb;
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int err;
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@ -307,7 +342,7 @@ static int vnet_rx_one(struct vnet_port *port, unsigned int len,
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skb_put(skb, copy_len);
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err = ldc_copy(port->vio.lp, LDC_COPY_IN,
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skb->data, copy_len, 0,
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cookies, ncookies);
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desc->cookies, desc->ncookies);
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if (unlikely(err < 0)) {
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dev->stats.rx_frame_errors++;
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goto out_free_skb;
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@ -317,6 +352,28 @@ static int vnet_rx_one(struct vnet_port *port, unsigned int len,
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skb_trim(skb, len);
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skb->protocol = eth_type_trans(skb, dev);
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if (vio_version_after_eq(&port->vio, 1, 8)) {
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struct vio_net_dext *dext = vio_net_ext(desc);
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if (dext->flags & VNET_PKT_HCK_IPV4_HDRCKSUM) {
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if (skb->protocol == ETH_P_IP) {
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struct iphdr *iph = (struct iphdr *)skb->data;
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iph->check = 0;
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ip_send_check(iph);
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}
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}
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if ((dext->flags & VNET_PKT_HCK_FULLCKSUM) &&
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skb->ip_summed == CHECKSUM_NONE)
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vnet_fullcsum(skb);
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if (dext->flags & VNET_PKT_HCK_IPV4_HDRCKSUM_OK) {
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skb->ip_summed = CHECKSUM_PARTIAL;
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skb->csum_level = 0;
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if (dext->flags & VNET_PKT_HCK_FULLCKSUM_OK)
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skb->csum_level = 1;
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}
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}
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dev->stats.rx_packets++;
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dev->stats.rx_bytes += len;
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napi_gro_receive(&port->napi, skb);
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@ -451,7 +508,7 @@ static int vnet_walk_rx_one(struct vnet_port *port,
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desc->cookies[0].cookie_addr,
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desc->cookies[0].cookie_size);
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err = vnet_rx_one(port, desc->size, desc->cookies, desc->ncookies);
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err = vnet_rx_one(port, desc);
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if (err == -ECONNRESET)
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return err;
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desc->hdr.state = VIO_DESC_DONE;
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@ -940,8 +997,22 @@ static inline struct sk_buff *vnet_skb_shape(struct sk_buff *skb, void **pstart,
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if (((unsigned long)skb->data & 7) != VNET_PACKET_SKIP ||
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skb_tailroom(skb) < pad ||
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skb_headroom(skb) < VNET_PACKET_SKIP) {
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int offset;
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nskb = alloc_and_align_skb(skb->dev, skb->len);
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skb_reserve(nskb, VNET_PACKET_SKIP);
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nskb->protocol = skb->protocol;
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offset = skb_mac_header(skb) - skb->data;
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skb_set_mac_header(nskb, offset);
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offset = skb_network_header(skb) - skb->data;
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skb_set_network_header(nskb, offset);
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offset = skb_transport_header(skb) - skb->data;
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skb_set_transport_header(nskb, offset);
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nskb->csum_offset = skb->csum_offset;
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nskb->ip_summed = skb->ip_summed;
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if (skb_copy_bits(skb, 0, nskb->data, skb->len)) {
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dev_kfree_skb(nskb);
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dev_kfree_skb(skb);
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@ -1078,6 +1149,16 @@ static int vnet_start_xmit(struct sk_buff *skb, struct net_device *dev)
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d->ncookies = port->tx_bufs[txi].ncookies;
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for (i = 0; i < d->ncookies; i++)
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d->cookies[i] = port->tx_bufs[txi].cookies[i];
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if (vio_version_after_eq(&port->vio, 1, 7)) {
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struct vio_net_dext *dext = vio_net_ext(d);
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memset(dext, 0, sizeof(*dext));
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if (vio_version_after_eq(&port->vio, 1, 8) &&
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!port->switch_port) {
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dext->flags |= VNET_PKT_HCK_IPV4_HDRCKSUM_OK;
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dext->flags |= VNET_PKT_HCK_FULLCKSUM_OK;
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}
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}
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/* This has to be a non-SMP write barrier because we are writing
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* to memory which is shared with the peer LDOM.
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@ -1370,15 +1451,17 @@ static void vnet_port_free_tx_bufs(struct vnet_port *port)
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static int vnet_port_alloc_tx_ring(struct vnet_port *port)
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{
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struct vio_dring_state *dr;
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unsigned long len;
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unsigned long len, elen;
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int i, err, ncookies;
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void *dring;
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dr = &port->vio.drings[VIO_DRIVER_TX_RING];
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len = (VNET_TX_RING_SIZE *
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(sizeof(struct vio_net_desc) +
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(sizeof(struct ldc_trans_cookie) * 2)));
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elen = sizeof(struct vio_net_desc) +
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sizeof(struct ldc_trans_cookie) * 2;
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if (vio_version_after_eq(&port->vio, 1, 7))
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elen += sizeof(struct vio_net_dext);
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len = VNET_TX_RING_SIZE * elen;
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ncookies = VIO_MAX_RING_COOKIES;
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dring = ldc_alloc_exp_dring(port->vio.lp, len,
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@ -1392,8 +1475,7 @@ static int vnet_port_alloc_tx_ring(struct vnet_port *port)
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}
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dr->base = dring;
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dr->entry_size = (sizeof(struct vio_net_desc) +
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(sizeof(struct ldc_trans_cookie) * 2));
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dr->entry_size = elen;
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dr->num_entries = VNET_TX_RING_SIZE;
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dr->prod = dr->cons = 0;
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port->start_cons = true; /* need an initial trigger */
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