return skb;
}
+static inline void fm10k_rx_checksum(struct fm10k_ring *ring,
+ union fm10k_rx_desc *rx_desc,
+ struct sk_buff *skb)
+{
+ skb_checksum_none_assert(skb);
+
+ /* Rx checksum disabled via ethtool */
+ if (!(ring->netdev->features & NETIF_F_RXCSUM))
+ return;
+
+ /* TCP/UDP checksum error bit is set */
+ if (fm10k_test_staterr(rx_desc,
+ FM10K_RXD_STATUS_L4E |
+ FM10K_RXD_STATUS_L4E2 |
+ FM10K_RXD_STATUS_IPE |
+ FM10K_RXD_STATUS_IPE2)) {
+ ring->rx_stats.csum_err++;
+ return;
+ }
+
+ /* It must be a TCP or UDP packet with a valid checksum */
+ if (fm10k_test_staterr(rx_desc, FM10K_RXD_STATUS_L4CS2))
+ skb->encapsulation = true;
+ else if (!fm10k_test_staterr(rx_desc, FM10K_RXD_STATUS_L4CS))
+ return;
+
+ skb->ip_summed = CHECKSUM_UNNECESSARY;
+}
+
+#define FM10K_RSS_L4_TYPES_MASK \
+ ((1ul << FM10K_RSSTYPE_IPV4_TCP) | \
+ (1ul << FM10K_RSSTYPE_IPV4_UDP) | \
+ (1ul << FM10K_RSSTYPE_IPV6_TCP) | \
+ (1ul << FM10K_RSSTYPE_IPV6_UDP))
+
+static inline void fm10k_rx_hash(struct fm10k_ring *ring,
+ union fm10k_rx_desc *rx_desc,
+ struct sk_buff *skb)
+{
+ u16 rss_type;
+
+ if (!(ring->netdev->features & NETIF_F_RXHASH))
+ return;
+
+ rss_type = le16_to_cpu(rx_desc->w.pkt_info) & FM10K_RXD_RSSTYPE_MASK;
+ if (!rss_type)
+ return;
+
+ skb_set_hash(skb, le32_to_cpu(rx_desc->d.rss),
+ (FM10K_RSS_L4_TYPES_MASK & (1ul << rss_type)) ?
+ PKT_HASH_TYPE_L4 : PKT_HASH_TYPE_L3);
+}
+
/**
* fm10k_process_skb_fields - Populate skb header fields from Rx descriptor
* @rx_ring: rx descriptor ring packet is being transacted on
{
unsigned int len = skb->len;
+ fm10k_rx_hash(rx_ring, rx_desc, skb);
+
+ fm10k_rx_checksum(rx_ring, rx_desc, skb);
+
FM10K_CB(skb)->fi.w.vlan = rx_desc->w.vlan;
skb_record_rx_queue(skb, rx_ring->queue_index);
return total_packets < budget;
}
+#define VXLAN_HLEN (sizeof(struct udphdr) + 8)
+static struct ethhdr *fm10k_port_is_vxlan(struct sk_buff *skb)
+{
+ struct fm10k_intfc *interface = netdev_priv(skb->dev);
+ struct fm10k_vxlan_port *vxlan_port;
+
+ /* we can only offload a vxlan if we recognize it as such */
+ vxlan_port = list_first_entry_or_null(&interface->vxlan_port,
+ struct fm10k_vxlan_port, list);
+
+ if (!vxlan_port)
+ return NULL;
+ if (vxlan_port->port != udp_hdr(skb)->dest)
+ return NULL;
+
+ /* return offset of udp_hdr plus 8 bytes for VXLAN header */
+ return (struct ethhdr *)(skb_transport_header(skb) + VXLAN_HLEN);
+}
+
+#define FM10K_NVGRE_RESERVED0_FLAGS htons(0x9FFF)
+#define NVGRE_TNI htons(0x2000)
+struct fm10k_nvgre_hdr {
+ __be16 flags;
+ __be16 proto;
+ __be32 tni;
+};
+
+static struct ethhdr *fm10k_gre_is_nvgre(struct sk_buff *skb)
+{
+ struct fm10k_nvgre_hdr *nvgre_hdr;
+ int hlen = ip_hdrlen(skb);
+
+ /* currently only IPv4 is supported due to hlen above */
+ if (vlan_get_protocol(skb) != htons(ETH_P_IP))
+ return NULL;
+
+ /* our transport header should be NVGRE */
+ nvgre_hdr = (struct fm10k_nvgre_hdr *)(skb_network_header(skb) + hlen);
+
+ /* verify all reserved flags are 0 */
+ if (nvgre_hdr->flags & FM10K_NVGRE_RESERVED0_FLAGS)
+ return NULL;
+
+ /* verify protocol is transparent Ethernet bridging */
+ if (nvgre_hdr->proto != htons(ETH_P_TEB))
+ return NULL;
+
+ /* report start of ethernet header */
+ if (nvgre_hdr->flags & NVGRE_TNI)
+ return (struct ethhdr *)(nvgre_hdr + 1);
+
+ return (struct ethhdr *)(&nvgre_hdr->tni);
+}
+
+static __be16 fm10k_tx_encap_offload(struct sk_buff *skb)
+{
+ struct ethhdr *eth_hdr;
+ u8 l4_hdr = 0;
+
+ switch (vlan_get_protocol(skb)) {
+ case htons(ETH_P_IP):
+ l4_hdr = ip_hdr(skb)->protocol;
+ break;
+ case htons(ETH_P_IPV6):
+ l4_hdr = ipv6_hdr(skb)->nexthdr;
+ break;
+ default:
+ return 0;
+ }
+
+ switch (l4_hdr) {
+ case IPPROTO_UDP:
+ eth_hdr = fm10k_port_is_vxlan(skb);
+ break;
+ case IPPROTO_GRE:
+ eth_hdr = fm10k_gre_is_nvgre(skb);
+ break;
+ default:
+ return 0;
+ }
+
+ if (!eth_hdr)
+ return 0;
+
+ switch (eth_hdr->h_proto) {
+ case htons(ETH_P_IP):
+ case htons(ETH_P_IPV6):
+ break;
+ default:
+ return 0;
+ }
+
+ return eth_hdr->h_proto;
+}
+
+static int fm10k_tso(struct fm10k_ring *tx_ring,
+ struct fm10k_tx_buffer *first)
+{
+ struct sk_buff *skb = first->skb;
+ struct fm10k_tx_desc *tx_desc;
+ unsigned char *th;
+ u8 hdrlen;
+
+ if (skb->ip_summed != CHECKSUM_PARTIAL)
+ return 0;
+
+ if (!skb_is_gso(skb))
+ return 0;
+
+ /* compute header lengths */
+ if (skb->encapsulation) {
+ if (!fm10k_tx_encap_offload(skb))
+ goto err_vxlan;
+ th = skb_inner_transport_header(skb);
+ } else {
+ th = skb_transport_header(skb);
+ }
+
+ /* compute offset from SOF to transport header and add header len */
+ hdrlen = (th - skb->data) + (((struct tcphdr *)th)->doff << 2);
+
+ first->tx_flags |= FM10K_TX_FLAGS_CSUM;
+
+ /* update gso size and bytecount with header size */
+ first->gso_segs = skb_shinfo(skb)->gso_segs;
+ first->bytecount += (first->gso_segs - 1) * hdrlen;
+
+ /* populate Tx descriptor header size and mss */
+ tx_desc = FM10K_TX_DESC(tx_ring, tx_ring->next_to_use);
+ tx_desc->hdrlen = hdrlen;
+ tx_desc->mss = cpu_to_le16(skb_shinfo(skb)->gso_size);
+
+ return 1;
+err_vxlan:
+ tx_ring->netdev->features &= ~NETIF_F_GSO_UDP_TUNNEL;
+ if (!net_ratelimit())
+ netdev_err(tx_ring->netdev,
+ "TSO requested for unsupported tunnel, disabling offload\n");
+ return -1;
+}
+
+static void fm10k_tx_csum(struct fm10k_ring *tx_ring,
+ struct fm10k_tx_buffer *first)
+{
+ struct sk_buff *skb = first->skb;
+ struct fm10k_tx_desc *tx_desc;
+ union {
+ struct iphdr *ipv4;
+ struct ipv6hdr *ipv6;
+ u8 *raw;
+ } network_hdr;
+ __be16 protocol;
+ u8 l4_hdr = 0;
+
+ if (skb->ip_summed != CHECKSUM_PARTIAL)
+ goto no_csum;
+
+ if (skb->encapsulation) {
+ protocol = fm10k_tx_encap_offload(skb);
+ if (!protocol) {
+ if (skb_checksum_help(skb)) {
+ dev_warn(tx_ring->dev,
+ "failed to offload encap csum!\n");
+ tx_ring->tx_stats.csum_err++;
+ }
+ goto no_csum;
+ }
+ network_hdr.raw = skb_inner_network_header(skb);
+ } else {
+ protocol = vlan_get_protocol(skb);
+ network_hdr.raw = skb_network_header(skb);
+ }
+
+ switch (protocol) {
+ case htons(ETH_P_IP):
+ l4_hdr = network_hdr.ipv4->protocol;
+ break;
+ case htons(ETH_P_IPV6):
+ l4_hdr = network_hdr.ipv6->nexthdr;
+ break;
+ default:
+ if (unlikely(net_ratelimit())) {
+ dev_warn(tx_ring->dev,
+ "partial checksum but ip version=%x!\n",
+ protocol);
+ }
+ tx_ring->tx_stats.csum_err++;
+ goto no_csum;
+ }
+
+ switch (l4_hdr) {
+ case IPPROTO_TCP:
+ case IPPROTO_UDP:
+ break;
+ case IPPROTO_GRE:
+ if (skb->encapsulation)
+ break;
+ default:
+ if (unlikely(net_ratelimit())) {
+ dev_warn(tx_ring->dev,
+ "partial checksum but l4 proto=%x!\n",
+ l4_hdr);
+ }
+ tx_ring->tx_stats.csum_err++;
+ goto no_csum;
+ }
+
+ /* update TX checksum flag */
+ first->tx_flags |= FM10K_TX_FLAGS_CSUM;
+
+no_csum:
+ /* populate Tx descriptor header size and mss */
+ tx_desc = FM10K_TX_DESC(tx_ring, tx_ring->next_to_use);
+ tx_desc->hdrlen = 0;
+ tx_desc->mss = 0;
+}
+
+#define FM10K_SET_FLAG(_input, _flag, _result) \
+ ((_flag <= _result) ? \
+ ((u32)(_input & _flag) * (_result / _flag)) : \
+ ((u32)(_input & _flag) / (_flag / _result)))
+
+static u8 fm10k_tx_desc_flags(struct sk_buff *skb, u32 tx_flags)
+{
+ /* set type for advanced descriptor with frame checksum insertion */
+ u32 desc_flags = 0;
+
+ /* set checksum offload bits */
+ desc_flags |= FM10K_SET_FLAG(tx_flags, FM10K_TX_FLAGS_CSUM,
+ FM10K_TXD_FLAG_CSUM);
+
+ return desc_flags;
+}
+
static bool fm10k_tx_desc_push(struct fm10k_ring *tx_ring,
struct fm10k_tx_desc *tx_desc, u16 i,
dma_addr_t dma, unsigned int size, u8 desc_flags)
unsigned char *data;
dma_addr_t dma;
unsigned int data_len, size;
+ u32 tx_flags = first->tx_flags;
u16 i = tx_ring->next_to_use;
- u8 flags = 0;
+ u8 flags = fm10k_tx_desc_flags(skb, tx_flags);
tx_desc = FM10K_TX_DESC(tx_ring, i);
struct fm10k_ring *tx_ring)
{
struct fm10k_tx_buffer *first;
+ int tso;
u32 tx_flags = 0;
#if PAGE_SIZE > FM10K_MAX_DATA_PER_TXD
unsigned short f;
/* record initial flags and protocol */
first->tx_flags = tx_flags;
+ tso = fm10k_tso(tx_ring, first);
+ if (tso < 0)
+ goto out_drop;
+ else if (!tso)
+ fm10k_tx_csum(tx_ring, first);
+
fm10k_tx_map(tx_ring, first);
fm10k_maybe_stop_tx(tx_ring, DESC_NEEDED);
+ return NETDEV_TX_OK;
+
+out_drop:
+ dev_kfree_skb_any(first->skb);
+ first->skb = NULL;
+
return NETDEV_TX_OK;
}
#include "fm10k.h"
#include <linux/vmalloc.h>
+#if IS_ENABLED(CONFIG_VXLAN)
+#include <net/vxlan.h>
+#endif /* CONFIG_VXLAN */
/**
* fm10k_setup_tx_resources - allocate Tx resources (Descriptors)
interface->glort_count = mask + 1;
}
+/**
+ * fm10k_del_vxlan_port_all
+ * @interface: board private structure
+ *
+ * This function frees the entire vxlan_port list
+ **/
+static void fm10k_del_vxlan_port_all(struct fm10k_intfc *interface)
+{
+ struct fm10k_vxlan_port *vxlan_port;
+
+ /* flush all entries from list */
+ vxlan_port = list_first_entry_or_null(&interface->vxlan_port,
+ struct fm10k_vxlan_port, list);
+ while (vxlan_port) {
+ list_del(&vxlan_port->list);
+ kfree(vxlan_port);
+ vxlan_port = list_first_entry_or_null(&interface->vxlan_port,
+ struct fm10k_vxlan_port,
+ list);
+ }
+}
+
+/**
+ * fm10k_restore_vxlan_port
+ * @interface: board private structure
+ *
+ * This function restores the value in the tunnel_cfg register after reset
+ **/
+static void fm10k_restore_vxlan_port(struct fm10k_intfc *interface)
+{
+ struct fm10k_hw *hw = &interface->hw;
+ struct fm10k_vxlan_port *vxlan_port;
+
+ /* only the PF supports configuring tunnels */
+ if (hw->mac.type != fm10k_mac_pf)
+ return;
+
+ vxlan_port = list_first_entry_or_null(&interface->vxlan_port,
+ struct fm10k_vxlan_port, list);
+
+ /* restore tunnel configuration register */
+ fm10k_write_reg(hw, FM10K_TUNNEL_CFG,
+ (vxlan_port ? ntohs(vxlan_port->port) : 0) |
+ (ETH_P_TEB << FM10K_TUNNEL_CFG_NVGRE_SHIFT));
+}
+
+/**
+ * fm10k_add_vxlan_port
+ * @netdev: network interface device structure
+ * @sa_family: Address family of new port
+ * @port: port number used for VXLAN
+ *
+ * This funciton is called when a new VXLAN interface has added a new port
+ * number to the range that is currently in use for VXLAN. The new port
+ * number is always added to the tail so that the port number list should
+ * match the order in which the ports were allocated. The head of the list
+ * is always used as the VXLAN port number for offloads.
+ **/
+static void fm10k_add_vxlan_port(struct net_device *dev,
+ sa_family_t sa_family, __be16 port) {
+ struct fm10k_intfc *interface = netdev_priv(dev);
+ struct fm10k_vxlan_port *vxlan_port;
+
+ /* only the PF supports configuring tunnels */
+ if (interface->hw.mac.type != fm10k_mac_pf)
+ return;
+
+ /* existing ports are pulled out so our new entry is always last */
+ fm10k_vxlan_port_for_each(vxlan_port, interface) {
+ if ((vxlan_port->port == port) &&
+ (vxlan_port->sa_family == sa_family)) {
+ list_del(&vxlan_port->list);
+ goto insert_tail;
+ }
+ }
+
+ /* allocate memory to track ports */
+ vxlan_port = kmalloc(sizeof(*vxlan_port), GFP_ATOMIC);
+ if (!vxlan_port)
+ return;
+ vxlan_port->port = port;
+ vxlan_port->sa_family = sa_family;
+
+insert_tail:
+ /* add new port value to list */
+ list_add_tail(&vxlan_port->list, &interface->vxlan_port);
+
+ fm10k_restore_vxlan_port(interface);
+}
+
+/**
+ * fm10k_del_vxlan_port
+ * @netdev: network interface device structure
+ * @sa_family: Address family of freed port
+ * @port: port number used for VXLAN
+ *
+ * This funciton is called when a new VXLAN interface has freed a port
+ * number from the range that is currently in use for VXLAN. The freed
+ * port is removed from the list and the new head is used to determine
+ * the port number for offloads.
+ **/
+static void fm10k_del_vxlan_port(struct net_device *dev,
+ sa_family_t sa_family, __be16 port) {
+ struct fm10k_intfc *interface = netdev_priv(dev);
+ struct fm10k_vxlan_port *vxlan_port;
+
+ if (interface->hw.mac.type != fm10k_mac_pf)
+ return;
+
+ /* find the port in the list and free it */
+ fm10k_vxlan_port_for_each(vxlan_port, interface) {
+ if ((vxlan_port->port == port) &&
+ (vxlan_port->sa_family == sa_family)) {
+ list_del(&vxlan_port->list);
+ kfree(vxlan_port);
+ break;
+ }
+ }
+
+ fm10k_restore_vxlan_port(interface);
+}
+
/**
* fm10k_open - Called when a network interface is made active
* @netdev: network interface device structure
if (err)
goto err_set_queues;
+#if IS_ENABLED(CONFIG_VXLAN)
+ /* update VXLAN port configuration */
+ vxlan_get_rx_port(netdev);
+
+#endif
fm10k_up(interface);
return 0;
fm10k_qv_free_irq(interface);
+ fm10k_del_vxlan_port_all(interface);
+
fm10k_free_all_tx_resources(interface);
fm10k_free_all_rx_resources(interface);
/* record updated xcast mode state */
interface->xcast_mode = xcast_mode;
+
+ /* Restore tunnel configuration */
+ fm10k_restore_vxlan_port(interface);
}
void fm10k_reset_rx_state(struct fm10k_intfc *interface)
.ndo_set_rx_mode = fm10k_set_rx_mode,
.ndo_get_stats64 = fm10k_get_stats64,
.ndo_setup_tc = fm10k_setup_tc,
+ .ndo_add_vxlan_port = fm10k_add_vxlan_port,
+ .ndo_del_vxlan_port = fm10k_del_vxlan_port,
};
#define DEFAULT_DEBUG_LEVEL_SHIFT 3
interface->msg_enable = (1 << DEFAULT_DEBUG_LEVEL_SHIFT) - 1;
/* configure default features */
- dev->features |= NETIF_F_SG;
+ dev->features |= NETIF_F_IP_CSUM |
+ NETIF_F_IPV6_CSUM |
+ NETIF_F_SG |
+ NETIF_F_TSO |
+ NETIF_F_TSO6 |
+ NETIF_F_TSO_ECN |
+ NETIF_F_GSO_UDP_TUNNEL |
+ NETIF_F_RXHASH |
+ NETIF_F_RXCSUM;
/* all features defined to this point should be changeable */
dev->hw_features |= dev->features;
dev->vlan_features |= dev->features;
/* configure tunnel offloads */
- dev->hw_enc_features = NETIF_F_SG;
+ dev->hw_enc_features = NETIF_F_IP_CSUM |
+ NETIF_F_TSO |
+ NETIF_F_TSO6 |
+ NETIF_F_TSO_ECN |
+ NETIF_F_GSO_UDP_TUNNEL |
+ NETIF_F_IPV6_CSUM |
+ NETIF_F_SG;
/* we want to leave these both on as we cannot disable VLAN tag
* insertion or stripping on the hardware since it is contained
git.openpandora.org / pandora-kernel.git / commitdiff