static inline void sgiseeq_rx(struct net_device *dev, struct sgiseeq_private *sp, struct hpc3_ethregs *hregs, struct sgiseeq_regs *sregs) { struct sgiseeq_rx_desc *rd; struct sk_buff *skb = 0; unsigned char pkt_status; unsigned char *pkt_pointer = 0; int len = 0; unsigned int orig_end = PREV_RX(sp->rx_new); /* Service every received packet. */ for_each_rx(rd, sp) { len = PKT_BUF_SZ - (rd->rdma.cntinfo & HPCDMA_BCNT) - 3; pkt_pointer = (unsigned char *)(long)rd->buf_vaddr; pkt_status = pkt_pointer[len + 2]; if (pkt_status & SEEQ_RSTAT_FIG) { /* Packet is OK. */ skb = dev_alloc_skb(len + 2); if (skb) { skb->dev = dev; skb_reserve(skb, 2); skb_put(skb, len); /* Copy out of kseg1 to avoid silly cache flush. */ eth_copy_and_sum(skb, pkt_pointer + 2, len, 0); skb->protocol = eth_type_trans(skb, dev); /* We don't want to receive our own packets */ if (memcmp(eth_hdr(skb)->h_source, dev->dev_addr, ETH_ALEN)) { netif_rx(skb); dev->last_rx = jiffies; sp->stats.rx_packets++; sp->stats.rx_bytes += len; } else { /* Silently drop my own packets */ dev_kfree_skb_irq(skb); } } else { printk (KERN_NOTICE "%s: Memory squeeze, deferring packet.\n", dev->name); sp->stats.rx_dropped++; } } else { record_rx_errors(sp, pkt_status); } /* Return the entry to the ring pool. */ rd->rdma.cntinfo = RCNTINFO_INIT; sp->rx_new = NEXT_RX(sp->rx_new); }
static inline void sgiseeq_rx(struct net_device *dev, struct sgiseeq_private *sp, struct hpc3_ethregs *hregs, struct sgiseeq_regs *sregs) { struct sgiseeq_rx_desc *rd; struct sk_buff *skb = NULL; struct sk_buff *newskb; unsigned char pkt_status; int len = 0; unsigned int orig_end = PREV_RX(sp->rx_new); /* Service every received packet. */ rd = &sp->rx_desc[sp->rx_new]; dma_sync_desc_cpu(dev, rd); while (!(rd->rdma.cntinfo & HPCDMA_OWN)) { len = PKT_BUF_SZ - (rd->rdma.cntinfo & HPCDMA_BCNT) - 3; dma_unmap_single(dev->dev.parent, rd->rdma.pbuf, PKT_BUF_SZ, DMA_FROM_DEVICE); pkt_status = rd->skb->data[len]; if (pkt_status & SEEQ_RSTAT_FIG) { /* Packet is OK. */ /* We don't want to receive our own packets */ if (memcmp(rd->skb->data + 6, dev->dev_addr, ETH_ALEN)) { if (len > rx_copybreak) { skb = rd->skb; newskb = netdev_alloc_skb(dev, PKT_BUF_SZ); if (!newskb) { newskb = skb; skb = NULL; goto memory_squeeze; } skb_reserve(newskb, 2); } else { skb = netdev_alloc_skb_ip_align(dev, len); if (skb) skb_copy_to_linear_data(skb, rd->skb->data, len); newskb = rd->skb; } memory_squeeze: if (skb) { skb_put(skb, len); skb->protocol = eth_type_trans(skb, dev); netif_rx(skb); dev->stats.rx_packets++; dev->stats.rx_bytes += len; } else { printk(KERN_NOTICE "%s: Memory squeeze, deferring packet.\n", dev->name); dev->stats.rx_dropped++; } } else { /* Silently drop my own packets */ newskb = rd->skb; } } else { record_rx_errors(dev, pkt_status); newskb = rd->skb; } rd->skb = newskb; rd->rdma.pbuf = dma_map_single(dev->dev.parent, newskb->data - 2, PKT_BUF_SZ, DMA_FROM_DEVICE); /* Return the entry to the ring pool. */ rd->rdma.cntinfo = RCNTINFO_INIT; sp->rx_new = NEXT_RX(sp->rx_new); dma_sync_desc_dev(dev, rd); rd = &sp->rx_desc[sp->rx_new]; dma_sync_desc_cpu(dev, rd); } dma_sync_desc_cpu(dev, &sp->rx_desc[orig_end]); sp->rx_desc[orig_end].rdma.cntinfo &= ~(HPCDMA_EOR); dma_sync_desc_dev(dev, &sp->rx_desc[orig_end]); dma_sync_desc_cpu(dev, &sp->rx_desc[PREV_RX(sp->rx_new)]); sp->rx_desc[PREV_RX(sp->rx_new)].rdma.cntinfo |= HPCDMA_EOR; dma_sync_desc_dev(dev, &sp->rx_desc[PREV_RX(sp->rx_new)]); rx_maybe_restart(sp, hregs, sregs); }