1 // SPDX-License-Identifier: (GPL-2.0 OR BSD-3-Clause)
3 * Copyright(c) 2020 Intel Corporation.
10 #define HFI1_IPOIB_SKB_PAD ((NET_SKB_PAD) + (NET_IP_ALIGN))
12 static void copy_ipoib_buf(struct sk_buff *skb, void *data, int size)
16 skb_checksum_none_assert(skb);
17 skb->protocol = *((__be16 *)data);
19 dst_data = skb_put(skb, size);
20 memcpy(dst_data, data, size);
21 skb->mac_header = HFI1_IPOIB_PSEUDO_LEN;
22 skb_pull(skb, HFI1_IPOIB_ENCAP_LEN);
25 static struct sk_buff *prepare_frag_skb(struct napi_struct *napi, int size)
28 int skb_size = SKB_DATA_ALIGN(size + HFI1_IPOIB_SKB_PAD);
31 skb_size += SKB_DATA_ALIGN(sizeof(struct skb_shared_info));
32 skb_size = SKB_DATA_ALIGN(skb_size);
33 frag = napi_alloc_frag(skb_size);
36 return napi_alloc_skb(napi, size);
38 skb = build_skb(frag, skb_size);
45 skb_reserve(skb, HFI1_IPOIB_SKB_PAD);
49 struct sk_buff *hfi1_ipoib_prepare_skb(struct hfi1_netdev_rxq *rxq,
52 struct napi_struct *napi = &rxq->napi;
53 int skb_size = size + HFI1_IPOIB_ENCAP_LEN;
57 * For smaller(4k + skb overhead) allocations we will go using
58 * napi cache. Otherwise we will try to use napi frag cache.
60 if (size <= SKB_WITH_OVERHEAD(PAGE_SIZE))
61 skb = napi_alloc_skb(napi, skb_size);
63 skb = prepare_frag_skb(napi, skb_size);
68 copy_ipoib_buf(skb, data, size);
73 int hfi1_ipoib_rxq_init(struct net_device *netdev)
75 struct hfi1_ipoib_dev_priv *ipoib_priv = hfi1_ipoib_priv(netdev);
76 struct hfi1_devdata *dd = ipoib_priv->dd;
79 ret = hfi1_netdev_rx_init(dd);
83 hfi1_init_aip_rsm(dd);
88 void hfi1_ipoib_rxq_deinit(struct net_device *netdev)
90 struct hfi1_ipoib_dev_priv *ipoib_priv = hfi1_ipoib_priv(netdev);
91 struct hfi1_devdata *dd = ipoib_priv->dd;
93 hfi1_deinit_aip_rsm(dd);
94 hfi1_netdev_rx_destroy(dd);