/* free Tx skb function */ static int sh_eth_txfree(struct net_device *ndev) { struct sh_eth_private *mdp = netdev_priv(ndev); struct sh_eth_txdesc *txdesc; int freeNum = 0; int entry = 0; for (; mdp->cur_tx - mdp->dirty_tx > 0; mdp->dirty_tx++) { entry = mdp->dirty_tx % TX_RING_SIZE; txdesc = &mdp->tx_ring[entry]; if (txdesc->status & cpu_to_edmac(mdp, TD_TACT)) break; /* Free the original skb. */ if (mdp->tx_skbuff[entry]) { dev_kfree_skb_irq(mdp->tx_skbuff[entry]); mdp->tx_skbuff[entry] = NULL; freeNum++; } txdesc->status = cpu_to_edmac(mdp, TD_TFP); if (entry >= TX_RING_SIZE - 1) txdesc->status |= cpu_to_edmac(mdp, TD_TDLE); mdp->stats.tx_packets++; mdp->stats.tx_bytes += txdesc->buffer_length; } return freeNum; }
/* Packet transmit function */ static int sh_eth_start_xmit(struct sk_buff *skb, struct net_device *ndev) { struct sh_eth_private *mdp = netdev_priv(ndev); struct sh_eth_txdesc *txdesc; u32 entry; unsigned long flags; spin_lock_irqsave(&mdp->lock, flags); if ((mdp->cur_tx - mdp->dirty_tx) >= (TX_RING_SIZE - 4)) { if (!sh_eth_txfree(ndev)) { if (netif_msg_tx_queued(mdp)) dev_warn(&ndev->dev, "TxFD exhausted.\n"); netif_stop_queue(ndev); spin_unlock_irqrestore(&mdp->lock, flags); return NETDEV_TX_BUSY; } } spin_unlock_irqrestore(&mdp->lock, flags); entry = mdp->cur_tx % TX_RING_SIZE; mdp->tx_skbuff[entry] = skb; txdesc = &mdp->tx_ring[entry]; txdesc->addr = virt_to_phys(skb->data); /* soft swap. */ if (!mdp->cd->hw_swap) sh_eth_soft_swap(phys_to_virt(ALIGN(txdesc->addr, 4)), skb->len + 2); /* write back */ __flush_purge_region(skb->data, skb->len); if (skb->len < ETHERSMALL) txdesc->buffer_length = ETHERSMALL; else txdesc->buffer_length = skb->len; if (entry >= TX_RING_SIZE - 1) txdesc->status |= cpu_to_edmac(mdp, TD_TACT | TD_TDLE); else txdesc->status |= cpu_to_edmac(mdp, TD_TACT); mdp->cur_tx++; if (!(sh_eth_read(ndev, EDTRR) & sh_eth_get_edtrr_trns(mdp))) sh_eth_write(ndev, sh_eth_get_edtrr_trns(mdp), EDTRR); return NETDEV_TX_OK; }
/* Packet transmit function */ static int sh_eth_start_xmit(struct sk_buff *skb, struct net_device *ndev) { struct sh_eth_private *mdp = netdev_priv(ndev); struct sh_eth_txdesc *txdesc; u32 entry; unsigned long flags; spin_lock_irqsave(&mdp->lock, flags); if ((mdp->cur_tx - mdp->dirty_tx) >= (TX_RING_SIZE - 4)) { if (!sh_eth_txfree(ndev)) { netif_stop_queue(ndev); spin_unlock_irqrestore(&mdp->lock, flags); return 1; } } spin_unlock_irqrestore(&mdp->lock, flags); entry = mdp->cur_tx % TX_RING_SIZE; mdp->tx_skbuff[entry] = skb; txdesc = &mdp->tx_ring[entry]; txdesc->addr = (u32)(skb->data); /* soft swap. */ swaps((char *)(txdesc->addr & ~0x3), skb->len + 2); /* write back */ __flush_purge_region(skb->data, skb->len); if (skb->len < ETHERSMALL) txdesc->buffer_length = ETHERSMALL; else txdesc->buffer_length = skb->len; if (entry >= TX_RING_SIZE - 1) txdesc->status |= cpu_to_edmac(mdp, TD_TACT | TD_TDLE); else txdesc->status |= cpu_to_edmac(mdp, TD_TACT); mdp->cur_tx++; if (!(ctrl_inl(ndev->base_addr + EDTRR) & EDTRR_TRNS)) ctrl_outl(EDTRR_TRNS, ndev->base_addr + EDTRR); ndev->trans_start = jiffies; return 0; }
/* Packet receive function */ static int sh_eth_rx(struct net_device *ndev) { struct sh_eth_private *mdp = netdev_priv(ndev); struct sh_eth_rxdesc *rxdesc; int entry = mdp->cur_rx % RX_RING_SIZE; int boguscnt = (mdp->dirty_rx + RX_RING_SIZE) - mdp->cur_rx; struct sk_buff *skb; u16 pkt_len = 0; u32 desc_status, reserve = 0; rxdesc = &mdp->rx_ring[entry]; while (!(rxdesc->status & cpu_to_edmac(mdp, RD_RACT))) { desc_status = edmac_to_cpu(mdp, rxdesc->status); pkt_len = rxdesc->frame_length; if (--boguscnt < 0) break; if (!(desc_status & RDFEND)) mdp->stats.rx_length_errors++; if (desc_status & (RD_RFS1 | RD_RFS2 | RD_RFS3 | RD_RFS4 | RD_RFS5 | RD_RFS6 | RD_RFS10)) { mdp->stats.rx_errors++; if (desc_status & RD_RFS1) mdp->stats.rx_crc_errors++; if (desc_status & RD_RFS2) mdp->stats.rx_frame_errors++; if (desc_status & RD_RFS3) mdp->stats.rx_length_errors++; if (desc_status & RD_RFS4) mdp->stats.rx_length_errors++; if (desc_status & RD_RFS6) mdp->stats.rx_missed_errors++; if (desc_status & RD_RFS10) mdp->stats.rx_over_errors++; } else { swaps((char *)(rxdesc->addr & ~0x3), pkt_len + 2); skb = mdp->rx_skbuff[entry]; mdp->rx_skbuff[entry] = NULL; skb_put(skb, pkt_len); skb->protocol = eth_type_trans(skb, ndev); netif_rx(skb); mdp->stats.rx_packets++; mdp->stats.rx_bytes += pkt_len; } rxdesc->status |= cpu_to_edmac(mdp, RD_RACT); entry = (++mdp->cur_rx) % RX_RING_SIZE; } /* Refill the Rx ring buffers. */ for (; mdp->cur_rx - mdp->dirty_rx > 0; mdp->dirty_rx++) { entry = mdp->dirty_rx % RX_RING_SIZE; rxdesc = &mdp->rx_ring[entry]; /* The size of the buffer is 16 byte boundary. */ rxdesc->buffer_length = (mdp->rx_buf_sz + 16) & ~0x0F; if (mdp->rx_skbuff[entry] == NULL) { skb = dev_alloc_skb(mdp->rx_buf_sz); mdp->rx_skbuff[entry] = skb; if (skb == NULL) break; /* Better luck next round. */ skb->dev = ndev; #if defined(CONFIG_CPU_SUBTYPE_SH7763) reserve = SH7763_SKB_ALIGN - ((uint32_t)skb->data & (SH7763_SKB_ALIGN-1)); if (reserve) skb_reserve(skb, reserve); #else skb_reserve(skb, RX_OFFSET); #endif skb->ip_summed = CHECKSUM_NONE; rxdesc->addr = (u32)skb->data & ~0x3UL; } if (entry >= RX_RING_SIZE - 1) rxdesc->status |= cpu_to_edmac(mdp, RD_RACT | RD_RFP | RD_RDEL); else rxdesc->status |= cpu_to_edmac(mdp, RD_RACT | RD_RFP); } /* Restart Rx engine if stopped. */ /* If we don't need to check status, don't. -KDU */ if (!(ctrl_inl(ndev->base_addr + EDRRR) & EDRRR_R)) ctrl_outl(EDRRR_R, ndev->base_addr + EDRRR); return 0; }
/* format skb and descriptor buffer */ static void sh_eth_ring_format(struct net_device *ndev) { u32 ioaddr = ndev->base_addr, reserve = 0; struct sh_eth_private *mdp = netdev_priv(ndev); int i; struct sk_buff *skb; struct sh_eth_rxdesc *rxdesc = NULL; struct sh_eth_txdesc *txdesc = NULL; int rx_ringsize = sizeof(*rxdesc) * RX_RING_SIZE; int tx_ringsize = sizeof(*txdesc) * TX_RING_SIZE; mdp->cur_rx = mdp->cur_tx = 0; mdp->dirty_rx = mdp->dirty_tx = 0; memset(mdp->rx_ring, 0, rx_ringsize); /* build Rx ring buffer */ for (i = 0; i < RX_RING_SIZE; i++) { /* skb */ mdp->rx_skbuff[i] = NULL; skb = dev_alloc_skb(mdp->rx_buf_sz); mdp->rx_skbuff[i] = skb; if (skb == NULL) break; skb->dev = ndev; /* Mark as being used by this device. */ #if defined(CONFIG_CPU_SUBTYPE_SH7763) reserve = SH7763_SKB_ALIGN - ((uint32_t)skb->data & (SH7763_SKB_ALIGN-1)); if (reserve) skb_reserve(skb, reserve); #else skb_reserve(skb, RX_OFFSET); #endif /* RX descriptor */ rxdesc = &mdp->rx_ring[i]; rxdesc->addr = (u32)skb->data & ~0x3UL; rxdesc->status = cpu_to_edmac(mdp, RD_RACT | RD_RFP); /* The size of the buffer is 16 byte boundary. */ rxdesc->buffer_length = (mdp->rx_buf_sz + 16) & ~0x0F; /* Rx descriptor address set */ if (i == 0) { ctrl_outl((u32)rxdesc, ioaddr + RDLAR); #if defined(CONFIG_CPU_SUBTYPE_SH7763) ctrl_outl((u32)rxdesc, ioaddr + RDFAR); #endif } } /* Rx descriptor address set */ #if defined(CONFIG_CPU_SUBTYPE_SH7763) ctrl_outl((u32)rxdesc, ioaddr + RDFXR); ctrl_outl(0x1, ioaddr + RDFFR); #endif mdp->dirty_rx = (u32) (i - RX_RING_SIZE); /* Mark the last entry as wrapping the ring. */ rxdesc->status |= cpu_to_edmac(mdp, RD_RDEL); memset(mdp->tx_ring, 0, tx_ringsize); /* build Tx ring buffer */ for (i = 0; i < TX_RING_SIZE; i++) { mdp->tx_skbuff[i] = NULL; txdesc = &mdp->tx_ring[i]; txdesc->status = cpu_to_edmac(mdp, TD_TFP); txdesc->buffer_length = 0; if (i == 0) { /* Tx descriptor address set */ ctrl_outl((u32)txdesc, ioaddr + TDLAR); #if defined(CONFIG_CPU_SUBTYPE_SH7763) ctrl_outl((u32)txdesc, ioaddr + TDFAR); #endif } } /* Tx descriptor address set */ #if defined(CONFIG_CPU_SUBTYPE_SH7763) ctrl_outl((u32)txdesc, ioaddr + TDFXR); ctrl_outl(0x1, ioaddr + TDFFR); #endif txdesc->status |= cpu_to_edmac(mdp, TD_TDLE); }
/* Packet receive function */ static int sh_eth_rx(struct net_device *ndev) { struct sh_eth_private *mdp = netdev_priv(ndev); struct sh_eth_rxdesc *rxdesc; int entry = mdp->cur_rx % RX_RING_SIZE; int boguscnt = (mdp->dirty_rx + RX_RING_SIZE) - mdp->cur_rx; struct sk_buff *skb; u16 pkt_len = 0; u32 desc_status; rxdesc = &mdp->rx_ring[entry]; while (!(rxdesc->status & cpu_to_edmac(mdp, RD_RACT))) { desc_status = edmac_to_cpu(mdp, rxdesc->status); pkt_len = rxdesc->frame_length; if (--boguscnt < 0) break; if (!(desc_status & RDFEND)) mdp->stats.rx_length_errors++; if (desc_status & (RD_RFS1 | RD_RFS2 | RD_RFS3 | RD_RFS4 | RD_RFS5 | RD_RFS6 | RD_RFS10)) { mdp->stats.rx_errors++; if (desc_status & RD_RFS1) mdp->stats.rx_crc_errors++; if (desc_status & RD_RFS2) mdp->stats.rx_frame_errors++; if (desc_status & RD_RFS3) mdp->stats.rx_length_errors++; if (desc_status & RD_RFS4) mdp->stats.rx_length_errors++; if (desc_status & RD_RFS6) mdp->stats.rx_missed_errors++; if (desc_status & RD_RFS10) mdp->stats.rx_over_errors++; } else { if (!mdp->cd->hw_swap) sh_eth_soft_swap( phys_to_virt(ALIGN(rxdesc->addr, 4)), pkt_len + 2); skb = mdp->rx_skbuff[entry]; mdp->rx_skbuff[entry] = NULL; if (mdp->cd->rpadir) skb_reserve(skb, NET_IP_ALIGN); skb_put(skb, pkt_len); skb->protocol = eth_type_trans(skb, ndev); netif_rx(skb); mdp->stats.rx_packets++; mdp->stats.rx_bytes += pkt_len; } rxdesc->status |= cpu_to_edmac(mdp, RD_RACT); entry = (++mdp->cur_rx) % RX_RING_SIZE; rxdesc = &mdp->rx_ring[entry]; } /* Refill the Rx ring buffers. */ for (; mdp->cur_rx - mdp->dirty_rx > 0; mdp->dirty_rx++) { entry = mdp->dirty_rx % RX_RING_SIZE; rxdesc = &mdp->rx_ring[entry]; /* The size of the buffer is 16 byte boundary. */ rxdesc->buffer_length = ALIGN(mdp->rx_buf_sz, 16); if (mdp->rx_skbuff[entry] == NULL) { skb = dev_alloc_skb(mdp->rx_buf_sz); mdp->rx_skbuff[entry] = skb; if (skb == NULL) break; /* Better luck next round. */ dma_map_single(&ndev->dev, skb->tail, mdp->rx_buf_sz, DMA_FROM_DEVICE); skb->dev = ndev; sh_eth_set_receive_align(skb); skb_checksum_none_assert(skb); rxdesc->addr = virt_to_phys(PTR_ALIGN(skb->data, 4)); } if (entry >= RX_RING_SIZE - 1) rxdesc->status |= cpu_to_edmac(mdp, RD_RACT | RD_RFP | RD_RDEL); else rxdesc->status |= cpu_to_edmac(mdp, RD_RACT | RD_RFP); } /* Restart Rx engine if stopped. */ /* If we don't need to check status, don't. -KDU */ if (!(sh_eth_read(ndev, EDRRR) & EDRRR_R)) sh_eth_write(ndev, EDRRR_R, EDRRR); return 0; }
/* format skb and descriptor buffer */ static void sh_eth_ring_format(struct net_device *ndev) { struct sh_eth_private *mdp = netdev_priv(ndev); int i; struct sk_buff *skb; struct sh_eth_rxdesc *rxdesc = NULL; struct sh_eth_txdesc *txdesc = NULL; int rx_ringsize = sizeof(*rxdesc) * RX_RING_SIZE; int tx_ringsize = sizeof(*txdesc) * TX_RING_SIZE; mdp->cur_rx = mdp->cur_tx = 0; mdp->dirty_rx = mdp->dirty_tx = 0; memset(mdp->rx_ring, 0, rx_ringsize); /* build Rx ring buffer */ for (i = 0; i < RX_RING_SIZE; i++) { /* skb */ mdp->rx_skbuff[i] = NULL; skb = dev_alloc_skb(mdp->rx_buf_sz); mdp->rx_skbuff[i] = skb; if (skb == NULL) break; dma_map_single(&ndev->dev, skb->tail, mdp->rx_buf_sz, DMA_FROM_DEVICE); skb->dev = ndev; /* Mark as being used by this device. */ sh_eth_set_receive_align(skb); /* RX descriptor */ rxdesc = &mdp->rx_ring[i]; rxdesc->addr = virt_to_phys(PTR_ALIGN(skb->data, 4)); rxdesc->status = cpu_to_edmac(mdp, RD_RACT | RD_RFP); /* The size of the buffer is 16 byte boundary. */ rxdesc->buffer_length = ALIGN(mdp->rx_buf_sz, 16); /* Rx descriptor address set */ if (i == 0) { sh_eth_write(ndev, mdp->rx_desc_dma, RDLAR); if (sh_eth_is_gether(mdp)) sh_eth_write(ndev, mdp->rx_desc_dma, RDFAR); } } mdp->dirty_rx = (u32) (i - RX_RING_SIZE); /* Mark the last entry as wrapping the ring. */ rxdesc->status |= cpu_to_edmac(mdp, RD_RDEL); memset(mdp->tx_ring, 0, tx_ringsize); /* build Tx ring buffer */ for (i = 0; i < TX_RING_SIZE; i++) { mdp->tx_skbuff[i] = NULL; txdesc = &mdp->tx_ring[i]; txdesc->status = cpu_to_edmac(mdp, TD_TFP); txdesc->buffer_length = 0; if (i == 0) { /* Tx descriptor address set */ sh_eth_write(ndev, mdp->tx_desc_dma, TDLAR); if (sh_eth_is_gether(mdp)) sh_eth_write(ndev, mdp->tx_desc_dma, TDFAR); } } txdesc->status |= cpu_to_edmac(mdp, TD_TDLE); }