}
-/**************************************************************************
- *
- * Linux generic LRO handling
- *
- **************************************************************************
- */
-
-static int efx_lro_get_skb_hdr(struct sk_buff *skb, void **ip_hdr,
- void **tcpudp_hdr, u64 *hdr_flags, void *priv)
-{
- struct efx_channel *channel = priv;
- struct iphdr *iph;
- struct tcphdr *th;
-
- iph = (struct iphdr *)skb->data;
- if (skb->protocol != htons(ETH_P_IP) || iph->protocol != IPPROTO_TCP)
- goto fail;
-
- th = (struct tcphdr *)(skb->data + iph->ihl * 4);
-
- *tcpudp_hdr = th;
- *ip_hdr = iph;
- *hdr_flags = LRO_IPV4 | LRO_TCP;
-
- channel->rx_alloc_level += RX_ALLOC_FACTOR_LRO;
- return 0;
-fail:
- channel->rx_alloc_level += RX_ALLOC_FACTOR_SKB;
- return -1;
-}
-
-static int efx_get_frag_hdr(struct skb_frag_struct *frag, void **mac_hdr,
- void **ip_hdr, void **tcpudp_hdr, u64 *hdr_flags,
- void *priv)
-{
- struct efx_channel *channel = priv;
- struct ethhdr *eh;
- struct iphdr *iph;
-
- /* We support EtherII and VLAN encapsulated IPv4 */
- eh = page_address(frag->page) + frag->page_offset;
- *mac_hdr = eh;
-
- if (eh->h_proto == htons(ETH_P_IP)) {
- iph = (struct iphdr *)(eh + 1);
- } else {
- struct vlan_ethhdr *veh = (struct vlan_ethhdr *)eh;
- if (veh->h_vlan_encapsulated_proto != htons(ETH_P_IP))
- goto fail;
-
- iph = (struct iphdr *)(veh + 1);
- }
- *ip_hdr = iph;
-
- /* We can only do LRO over TCP */
- if (iph->protocol != IPPROTO_TCP)
- goto fail;
-
- *hdr_flags = LRO_IPV4 | LRO_TCP;
- *tcpudp_hdr = (struct tcphdr *)((u8 *) iph + iph->ihl * 4);
-
- channel->rx_alloc_level += RX_ALLOC_FACTOR_LRO;
- return 0;
- fail:
- channel->rx_alloc_level += RX_ALLOC_FACTOR_SKB;
- return -1;
-}
-
-int efx_lro_init(struct net_lro_mgr *lro_mgr, struct efx_nic *efx)
-{
- size_t s = sizeof(struct net_lro_desc) * EFX_MAX_LRO_DESCRIPTORS;
- struct net_lro_desc *lro_arr;
-
- /* Allocate the LRO descriptors structure */
- lro_arr = kzalloc(s, GFP_KERNEL);
- if (lro_arr == NULL)
- return -ENOMEM;
-
- lro_mgr->lro_arr = lro_arr;
- lro_mgr->max_desc = EFX_MAX_LRO_DESCRIPTORS;
- lro_mgr->max_aggr = EFX_MAX_LRO_AGGR;
- lro_mgr->frag_align_pad = EFX_PAGE_SKB_ALIGN;
-
- lro_mgr->get_skb_header = efx_lro_get_skb_hdr;
- lro_mgr->get_frag_header = efx_get_frag_hdr;
- lro_mgr->dev = efx->net_dev;
-
- lro_mgr->features = LRO_F_NAPI;
-
- /* We can pass packets up with the checksum intact */
- lro_mgr->ip_summed = CHECKSUM_UNNECESSARY;
-
- lro_mgr->ip_summed_aggr = CHECKSUM_UNNECESSARY;
-
- return 0;
-}
-
-void efx_lro_fini(struct net_lro_mgr *lro_mgr)
-{
- kfree(lro_mgr->lro_arr);
- lro_mgr->lro_arr = NULL;
-}
-
/**
* efx_init_rx_buffer_skb - create new RX buffer using skb-based allocation
*
static void efx_rx_packet_lro(struct efx_channel *channel,
struct efx_rx_buffer *rx_buf)
{
- struct net_lro_mgr *lro_mgr = &channel->lro_mgr;
- void *priv = channel;
+ struct napi_struct *napi = &channel->napi_str;
/* Pass the skb/page into the LRO engine */
if (rx_buf->page) {
- struct skb_frag_struct frags;
+ struct napi_gro_fraginfo info;
- frags.page = rx_buf->page;
- frags.page_offset = efx_rx_buf_offset(rx_buf);
- frags.size = rx_buf->len;
+ info.frags[0].page = rx_buf->page;
+ info.frags[0].page_offset = efx_rx_buf_offset(rx_buf);
+ info.frags[0].size = rx_buf->len;
+ info.nr_frags = 1;
+ info.ip_summed = CHECKSUM_UNNECESSARY;
+ info.len = rx_buf->len;
- lro_receive_frags(lro_mgr, &frags, rx_buf->len,
- rx_buf->len, priv, 0);
+ napi_gro_frags(napi, &info);
EFX_BUG_ON_PARANOID(rx_buf->skb);
rx_buf->page = NULL;
} else {
EFX_BUG_ON_PARANOID(!rx_buf->skb);
- lro_receive_skb(lro_mgr, rx_buf->skb, priv);
+ napi_gro_receive(napi, rx_buf->skb);
rx_buf->skb = NULL;
}
}
-/* Allocate and construct an SKB around a struct page.*/
-static struct sk_buff *efx_rx_mk_skb(struct efx_rx_buffer *rx_buf,
- struct efx_nic *efx,
- int hdr_len)
-{
- struct sk_buff *skb;
-
- /* Allocate an SKB to store the headers */
- skb = netdev_alloc_skb(efx->net_dev, hdr_len + EFX_PAGE_SKB_ALIGN);
- if (unlikely(skb == NULL)) {
- EFX_ERR_RL(efx, "RX out of memory for skb\n");
- return NULL;
- }
-
- EFX_BUG_ON_PARANOID(skb_shinfo(skb)->nr_frags);
- EFX_BUG_ON_PARANOID(rx_buf->len < hdr_len);
-
- skb->ip_summed = CHECKSUM_UNNECESSARY;
- skb_reserve(skb, EFX_PAGE_SKB_ALIGN);
-
- skb->len = rx_buf->len;
- skb->truesize = rx_buf->len + sizeof(struct sk_buff);
- memcpy(skb->data, rx_buf->data, hdr_len);
- skb->tail += hdr_len;
-
- /* Append the remaining page onto the frag list */
- if (unlikely(rx_buf->len > hdr_len)) {
- struct skb_frag_struct *frag = skb_shinfo(skb)->frags;
- frag->page = rx_buf->page;
- frag->page_offset = efx_rx_buf_offset(rx_buf) + hdr_len;
- frag->size = skb->len - hdr_len;
- skb_shinfo(skb)->nr_frags = 1;
- skb->data_len = frag->size;
- } else {
- __free_pages(rx_buf->page, efx->rx_buffer_order);
- skb->data_len = 0;
- }
-
- /* Ownership has transferred from the rx_buf to skb */
- rx_buf->page = NULL;
-
- /* Move past the ethernet header */
- skb->protocol = eth_type_trans(skb, efx->net_dev);
-
- return skb;
-}
-
void efx_rx_packet(struct efx_rx_queue *rx_queue, unsigned int index,
unsigned int len, bool checksummed, bool discard)
{
{
struct efx_nic *efx = channel->efx;
struct sk_buff *skb;
- bool lro = !!(efx->net_dev->features & NETIF_F_LRO);
/* If we're in loopback test, then pass the packet directly to the
* loopback layer, and free the rx_buf here
efx->net_dev);
}
- /* Both our generic-LRO and SFC-SSR support skb and page based
- * allocation, but neither support switching from one to the
- * other on the fly. If we spot that the allocation mode has
- * changed, then flush the LRO state.
- */
- if (unlikely(channel->rx_alloc_pop_pages != (rx_buf->page != NULL))) {
- efx_flush_lro(channel);
- channel->rx_alloc_pop_pages = (rx_buf->page != NULL);
- }
- if (likely(checksummed && lro)) {
+ if (likely(checksummed || rx_buf->page)) {
efx_rx_packet_lro(channel, rx_buf);
goto done;
}
- /* Form an skb if required */
- if (rx_buf->page) {
- int hdr_len = min(rx_buf->len, EFX_SKB_HEADERS);
- skb = efx_rx_mk_skb(rx_buf, efx, hdr_len);
- if (unlikely(skb == NULL)) {
- efx_free_rx_buffer(efx, rx_buf);
- goto done;
- }
- } else {
- /* We now own the SKB */
- skb = rx_buf->skb;
- rx_buf->skb = NULL;
- }
+ /* We now own the SKB */
+ skb = rx_buf->skb;
+ rx_buf->skb = NULL;
EFX_BUG_ON_PARANOID(rx_buf->page);
EFX_BUG_ON_PARANOID(rx_buf->skb);
EFX_BUG_ON_PARANOID(!skb);
/* Set the SKB flags */
- if (unlikely(!checksummed || !efx->rx_checksum_enabled))
- skb->ip_summed = CHECKSUM_NONE;
+ skb->ip_summed = CHECKSUM_NONE;
/* Pass the packet up */
netif_receive_skb(skb);
enum efx_rx_alloc_method method = rx_alloc_method;
/* Only makes sense to use page based allocation if LRO is enabled */
- if (!(channel->efx->net_dev->features & NETIF_F_LRO)) {
+ if (!(channel->efx->net_dev->features & NETIF_F_GRO)) {
method = RX_ALLOC_METHOD_SKB;
} else if (method == RX_ALLOC_METHOD_AUTO) {
/* Constrain the rx_alloc_level */
rx_queue->buffer = NULL;
}
-void efx_flush_lro(struct efx_channel *channel)
-{
- lro_flush_all(&channel->lro_mgr);
-}
-
module_param(rx_alloc_method, int, 0644);
MODULE_PARM_DESC(rx_alloc_method, "Allocation method used for RX buffers");
git://bbs.cooldavid.org / net-next-2.6.git / commitdiff