}
}
+static int hns3_alloc_skb(struct hns3_enet_ring *ring, int length,
+ unsigned char *va)
+{
+#define HNS3_NEED_ADD_FRAG 1
+ struct hns3_desc_cb *desc_cb = &ring->desc_cb[ring->next_to_clean];
+ struct net_device *netdev = ring->tqp->handle->kinfo.netdev;
+ struct sk_buff *skb;
+
+ ring->skb = napi_alloc_skb(&ring->tqp_vector->napi, HNS3_RX_HEAD_SIZE);
+ skb = ring->skb;
+ if (unlikely(!skb)) {
+ netdev_err(netdev, "alloc rx skb fail\n");
+
+ u64_stats_update_begin(&ring->syncp);
+ ring->stats.sw_err_cnt++;
+ u64_stats_update_end(&ring->syncp);
+
+ return -ENOMEM;
+ }
+
+ prefetchw(skb->data);
+
+ ring->pending_buf = 1;
+ if (length <= HNS3_RX_HEAD_SIZE) {
+ memcpy(__skb_put(skb, length), va, ALIGN(length, sizeof(long)));
+
+ /* We can reuse buffer as-is, just make sure it is local */
+ if (likely(page_to_nid(desc_cb->priv) == numa_node_id()))
+ desc_cb->reuse_flag = 1;
+ else /* This page cannot be reused so discard it */
+ put_page(desc_cb->priv);
+
+ ring_ptr_move_fw(ring, next_to_clean);
+ return 0;
+ }
+ u64_stats_update_begin(&ring->syncp);
+ ring->stats.seg_pkt_cnt++;
+ u64_stats_update_end(&ring->syncp);
+
+ ring->pull_len = eth_get_headlen(va, HNS3_RX_HEAD_SIZE);
+ __skb_put(skb, ring->pull_len);
+ hns3_nic_reuse_page(skb, 0, ring, ring->pull_len,
+ desc_cb);
+ ring_ptr_move_fw(ring, next_to_clean);
+
+ return HNS3_NEED_ADD_FRAG;
+}
+
+static int hns3_add_frag(struct hns3_enet_ring *ring, struct hns3_desc *desc,
+ struct sk_buff **out_skb, bool pending)
+{
+ struct sk_buff *skb = *out_skb;
+ struct hns3_desc_cb *desc_cb;
+ struct hns3_desc *pre_desc;
+ u32 bd_base_info;
+ int pre_bd;
+
+ /* if there is pending bd, the SW param next_to_clean has moved
+ * to next and the next is NULL
+ */
+ if (pending) {
+ pre_bd = (ring->next_to_clean - 1 + ring->desc_num) %
+ ring->desc_num;
+ pre_desc = &ring->desc[pre_bd];
+ bd_base_info = le32_to_cpu(pre_desc->rx.bd_base_info);
+ } else {
+ bd_base_info = le32_to_cpu(desc->rx.bd_base_info);
+ }
+
+ while (!hnae3_get_bit(bd_base_info, HNS3_RXD_FE_B)) {
+ desc = &ring->desc[ring->next_to_clean];
+ desc_cb = &ring->desc_cb[ring->next_to_clean];
+ bd_base_info = le32_to_cpu(desc->rx.bd_base_info);
+ if (!hnae3_get_bit(bd_base_info, HNS3_RXD_VLD_B))
+ return -ENXIO;
+
+ hns3_nic_reuse_page(skb, ring->pending_buf, ring, 0, desc_cb);
+ ring_ptr_move_fw(ring, next_to_clean);
+ ring->pending_buf++;
+ }
+
+ return 0;
+}
+
static void hns3_set_rx_skb_rss_type(struct hns3_enet_ring *ring,
struct sk_buff *skb)
{
}
static int hns3_handle_rx_bd(struct hns3_enet_ring *ring,
- struct sk_buff **out_skb, int *out_bnum)
+ struct sk_buff **out_skb)
{
struct net_device *netdev = ring->tqp->handle->kinfo.netdev;
+ struct sk_buff *skb = ring->skb;
struct hns3_desc_cb *desc_cb;
struct hns3_desc *desc;
- struct sk_buff *skb;
- unsigned char *va;
u32 bd_base_info;
- int pull_len;
u32 l234info;
int length;
- int bnum;
+ int ret;
desc = &ring->desc[ring->next_to_clean];
desc_cb = &ring->desc_cb[ring->next_to_clean];
/* Check valid BD */
if (unlikely(!hnae3_get_bit(bd_base_info, HNS3_RXD_VLD_B)))
- return -EFAULT;
+ return -ENXIO;
- va = (unsigned char *)desc_cb->buf + desc_cb->page_offset;
+ if (!skb)
+ ring->va = (unsigned char *)desc_cb->buf + desc_cb->page_offset;
/* Prefetch first cache line of first page
* Idea is to cache few bytes of the header of the packet. Our L1 Cache
* lines. In such a case, single fetch would suffice to cache in the
* relevant part of the header.
*/
- prefetch(va);
+ prefetch(ring->va);
#if L1_CACHE_BYTES < 128
- prefetch(va + L1_CACHE_BYTES);
+ prefetch(ring->va + L1_CACHE_BYTES);
#endif
- skb = *out_skb = napi_alloc_skb(&ring->tqp_vector->napi,
- HNS3_RX_HEAD_SIZE);
- if (unlikely(!skb)) {
- netdev_err(netdev, "alloc rx skb fail\n");
+ if (!skb) {
+ ret = hns3_alloc_skb(ring, length, ring->va);
+ *out_skb = skb = ring->skb;
- u64_stats_update_begin(&ring->syncp);
- ring->stats.sw_err_cnt++;
- u64_stats_update_end(&ring->syncp);
-
- return -ENOMEM;
- }
-
- prefetchw(skb->data);
-
- bnum = 1;
- if (length <= HNS3_RX_HEAD_SIZE) {
- memcpy(__skb_put(skb, length), va, ALIGN(length, sizeof(long)));
-
- /* We can reuse buffer as-is, just make sure it is local */
- if (likely(page_to_nid(desc_cb->priv) == numa_node_id()))
- desc_cb->reuse_flag = 1;
- else /* This page cannot be reused so discard it */
- put_page(desc_cb->priv);
+ if (ret < 0) /* alloc buffer fail */
+ return ret;
+ if (ret > 0) { /* need add frag */
+ ret = hns3_add_frag(ring, desc, &skb, false);
+ if (ret)
+ return ret;
- ring_ptr_move_fw(ring, next_to_clean);
+ /* As the head data may be changed when GRO enable, copy
+ * the head data in after other data rx completed
+ */
+ memcpy(skb->data, ring->va,
+ ALIGN(ring->pull_len, sizeof(long)));
+ }
} else {
- u64_stats_update_begin(&ring->syncp);
- ring->stats.seg_pkt_cnt++;
- u64_stats_update_end(&ring->syncp);
-
- pull_len = eth_get_headlen(va, HNS3_RX_HEAD_SIZE);
-
- memcpy(__skb_put(skb, pull_len), va,
- ALIGN(pull_len, sizeof(long)));
-
- hns3_nic_reuse_page(skb, 0, ring, pull_len, desc_cb);
- ring_ptr_move_fw(ring, next_to_clean);
+ ret = hns3_add_frag(ring, desc, &skb, true);
+ if (ret)
+ return ret;
- while (!hnae3_get_bit(bd_base_info, HNS3_RXD_FE_B)) {
- desc = &ring->desc[ring->next_to_clean];
- desc_cb = &ring->desc_cb[ring->next_to_clean];
- bd_base_info = le32_to_cpu(desc->rx.bd_base_info);
- hns3_nic_reuse_page(skb, bnum, ring, 0, desc_cb);
- ring_ptr_move_fw(ring, next_to_clean);
- bnum++;
- }
+ /* As the head data may be changed when GRO enable, copy
+ * the head data in after other data rx completed
+ */
+ memcpy(skb->data, ring->va,
+ ALIGN(ring->pull_len, sizeof(long)));
}
- *out_bnum = bnum;
-
l234info = le32_to_cpu(desc->rx.l234_info);
+ bd_base_info = le32_to_cpu(desc->rx.bd_base_info);
/* Based on hw strategy, the tag offloaded will be stored at
* ot_vlan_tag in two layer tag case, and stored at vlan_tag
ring->tqp_vector->rx_group.total_bytes += skb->len;
hns3_rx_checksum(ring, skb, desc);
+ *out_skb = skb;
hns3_set_rx_skb_rss_type(ring, skb);
return 0;
#define RCB_NOF_ALLOC_RX_BUFF_ONCE 16
struct net_device *netdev = ring->tqp->handle->kinfo.netdev;
int recv_pkts, recv_bds, clean_count, err;
- int unused_count = hns3_desc_unused(ring);
- struct sk_buff *skb = NULL;
- int num, bnum = 0;
+ int unused_count = hns3_desc_unused(ring) - ring->pending_buf;
+ struct sk_buff *skb = ring->skb;
+ int num;
num = readl_relaxed(ring->tqp->io_base + HNS3_RING_RX_RING_FBDNUM_REG);
rmb(); /* Make sure num taken effect before the other data is touched */
hns3_nic_alloc_rx_buffers(ring,
clean_count + unused_count);
clean_count = 0;
- unused_count = hns3_desc_unused(ring);
+ unused_count = hns3_desc_unused(ring) -
+ ring->pending_buf;
}
/* Poll one pkt */
- err = hns3_handle_rx_bd(ring, &skb, &bnum);
+ err = hns3_handle_rx_bd(ring, &skb);
if (unlikely(!skb)) /* This fault cannot be repaired */
goto out;
- recv_bds += bnum;
- clean_count += bnum;
- if (unlikely(err)) { /* Do jump the err */
- recv_pkts++;
+ if (err == -ENXIO) { /* Do not get FE for the packet */
+ goto out;
+ } else if (unlikely(err)) { /* Do jump the err */
+ recv_bds += ring->pending_buf;
+ clean_count += ring->pending_buf;
+ ring->skb = NULL;
+ ring->pending_buf = 0;
continue;
}
/* Do update ip stack process */
skb->protocol = eth_type_trans(skb, netdev);
rx_fn(ring, skb);
+ recv_bds += ring->pending_buf;
+ clean_count += ring->pending_buf;
+ ring->skb = NULL;
+ ring->pending_buf = 0;
recv_pkts++;
}
projects / openwrt / staging / blogic.git / commitdiff