C++ dev_kfree_skb_irq函数代码示例

//.........这里部分代码省略.........
	spin_unlock(&rnicp->lock);

	/*
	 * 1) completion of our sending a TERMINATE.
	 * 2) incoming TERMINATE message.
	 */
	if ((CQE_OPCODE(rsp_msg->cqe) == T3_TERMINATE) &&
	    (CQE_STATUS(rsp_msg->cqe) == 0)) {
		if (SQ_TYPE(rsp_msg->cqe)) {
			PDBG("%s QPID 0x%x ep %p disconnecting\n",
			     __func__, qhp->wq.qpid, qhp->ep);
			iwch_ep_disconnect(qhp->ep, 0, GFP_ATOMIC);
		} else {
			PDBG("%s post REQ_ERR AE QPID 0x%x\n", __func__,
			     qhp->wq.qpid);
			post_qp_event(rnicp, chp, rsp_msg,
				      IB_EVENT_QP_REQ_ERR, 0);
			iwch_ep_disconnect(qhp->ep, 0, GFP_ATOMIC);
		}
		goto done;
	}

	/* Bad incoming Read request */
	if (SQ_TYPE(rsp_msg->cqe) &&
	    (CQE_OPCODE(rsp_msg->cqe) == T3_READ_RESP)) {
		post_qp_event(rnicp, chp, rsp_msg, IB_EVENT_QP_REQ_ERR, 1);
		goto done;
	}

	/* Bad incoming write */
	if (RQ_TYPE(rsp_msg->cqe) &&
	    (CQE_OPCODE(rsp_msg->cqe) == T3_RDMA_WRITE)) {
		post_qp_event(rnicp, chp, rsp_msg, IB_EVENT_QP_REQ_ERR, 1);
		goto done;
	}

	switch (CQE_STATUS(rsp_msg->cqe)) {

	/* Completion Events */
	case TPT_ERR_SUCCESS:

		/*
		 * Confirm the destination entry if this is a RECV completion.
		 */
		if (qhp->ep && SQ_TYPE(rsp_msg->cqe))
			dst_confirm(qhp->ep->dst);
		(*chp->ibcq.comp_handler)(&chp->ibcq, chp->ibcq.cq_context);
		break;

	case TPT_ERR_STAG:
	case TPT_ERR_PDID:
	case TPT_ERR_QPID:
	case TPT_ERR_ACCESS:
	case TPT_ERR_WRAP:
	case TPT_ERR_BOUND:
	case TPT_ERR_INVALIDATE_SHARED_MR:
	case TPT_ERR_INVALIDATE_MR_WITH_MW_BOUND:
		post_qp_event(rnicp, chp, rsp_msg, IB_EVENT_QP_ACCESS_ERR, 1);
		break;

	/* Device Fatal Errors */
	case TPT_ERR_ECC:
	case TPT_ERR_ECC_PSTAG:
	case TPT_ERR_INTERNAL_ERR:
		post_qp_event(rnicp, chp, rsp_msg, IB_EVENT_DEVICE_FATAL, 1);
		break;

	/* QP Fatal Errors */
	case TPT_ERR_OUT_OF_RQE:
	case TPT_ERR_PBL_ADDR_BOUND:
	case TPT_ERR_CRC:
	case TPT_ERR_MARKER:
	case TPT_ERR_PDU_LEN_ERR:
	case TPT_ERR_DDP_VERSION:
	case TPT_ERR_RDMA_VERSION:
	case TPT_ERR_OPCODE:
	case TPT_ERR_DDP_QUEUE_NUM:
	case TPT_ERR_MSN:
	case TPT_ERR_TBIT:
	case TPT_ERR_MO:
	case TPT_ERR_MSN_GAP:
	case TPT_ERR_MSN_RANGE:
	case TPT_ERR_RQE_ADDR_BOUND:
	case TPT_ERR_IRD_OVERFLOW:
		post_qp_event(rnicp, chp, rsp_msg, IB_EVENT_QP_FATAL, 1);
		break;

	default:
		printk(KERN_ERR MOD "Unknown T3 status 0x%x QPID 0x%x\n",
		       CQE_STATUS(rsp_msg->cqe), qhp->wq.qpid);
		post_qp_event(rnicp, chp, rsp_msg, IB_EVENT_QP_FATAL, 1);
		break;
	}
done:
	if (atomic_dec_and_test(&chp->refcnt))
	        wake_up(&chp->wait);
	iwch_qp_rem_ref(&qhp->ibqp);
out:
	dev_kfree_skb_irq(skb);
}

static void elp_interrupt(int irq, void *dev_id, struct pt_regs *reg_ptr)
{
	int len;
	int dlen;
	int icount = 0;
	struct net_device *dev;
	elp_device *adapter;
	int timeout;

	dev = dev_id;
	adapter = (elp_device *) dev->priv;
	
	spin_lock(&adapter->lock);

	do {
		/*
		 * has a DMA transfer finished?
		 */
		if (inb_status(dev->base_addr) & DONE) {
			if (!adapter->dmaing) {
				printk("%s: phantom DMA completed\n", dev->name);
			}
			if (elp_debug >= 3) {
				printk("%s: %s DMA complete, status %02x\n", dev->name, adapter->current_dma.direction ? "tx" : "rx", inb_status(dev->base_addr));
			}

			outb_control(adapter->hcr_val & ~(DMAE | TCEN | DIR), dev);
			if (adapter->current_dma.direction) {
				dev_kfree_skb_irq(adapter->current_dma.skb);
			} else {
				struct sk_buff *skb = adapter->current_dma.skb;
				if (skb) {
					if (adapter->current_dma.target) {
				  	/* have already done the skb_put() */
				  	memcpy(adapter->current_dma.target, adapter->dma_buffer, adapter->current_dma.length);
					}
					skb->protocol = eth_type_trans(skb,dev);
					adapter->stats.rx_bytes += skb->len;
					netif_rx(skb);
					dev->last_rx = jiffies;
				}
			}
			adapter->dmaing = 0;
			if (adapter->rx_backlog.in != adapter->rx_backlog.out) {
				int t = adapter->rx_backlog.length[adapter->rx_backlog.out];
				adapter->rx_backlog.out = backlog_next(adapter->rx_backlog.out);
				if (elp_debug >= 2)
					printk("%s: receiving backlogged packet (%d)\n", dev->name, t);
				receive_packet(dev, t);
			} else {
				adapter->busy = 0;
			}
		} else {
			/* has one timed out? */
			check_3c505_dma(dev);
		}

		/*
		 * receive a PCB from the adapter
		 */
		timeout = jiffies + 3*HZ/100;
		while ((inb_status(dev->base_addr) & ACRF) != 0 && time_before(jiffies, timeout)) {
			if (receive_pcb(dev, &adapter->irx_pcb)) {
				switch (adapter->irx_pcb.command) 
				{
				case 0:
					break;
					/*
					 * received a packet - this must be handled fast
					 */
				case 0xff:
				case CMD_RECEIVE_PACKET_COMPLETE:
					/* if the device isn't open, don't pass packets up the stack */
					if (!netif_running(dev))
						break;
					len = adapter->irx_pcb.data.rcv_resp.pkt_len;
					dlen = adapter->irx_pcb.data.rcv_resp.buf_len;
					if (adapter->irx_pcb.data.rcv_resp.timeout != 0) {
						printk(KERN_ERR "%s: interrupt - packet not received correctly\n", dev->name);
					} else {
						if (elp_debug >= 3) {
							printk("%s: interrupt - packet received of length %i (%i)\n", dev->name, len, dlen);
						}
						if (adapter->irx_pcb.command == 0xff) {
							if (elp_debug >= 2)
								printk("%s: adding packet to backlog (len = %d)\n", dev->name, dlen);
							adapter->rx_backlog.length[adapter->rx_backlog.in] = dlen;
							adapter->rx_backlog.in = backlog_next(adapter->rx_backlog.in);
						} else {
							receive_packet(dev, dlen);
						}
						if (elp_debug >= 3)
							printk("%s: packet received\n", dev->name);
					}
					break;

					/*
					 * 82586 configured correctly
					 */
				case CMD_CONFIGURE_82586_RESPONSE:
//.........这里部分代码省略.........

static void fs_enet_tx(struct net_device *dev)
{
	struct fs_enet_private *fep = netdev_priv(dev);
	cbd_t __iomem *bdp;
	struct sk_buff *skb;
	int dirtyidx, do_wake, do_restart;
	u16 sc;

	spin_lock(&fep->tx_lock);
	bdp = fep->dirty_tx;

	do_wake = do_restart = 0;
	while (((sc = CBDR_SC(bdp)) & BD_ENET_TX_READY) == 0) {
		dirtyidx = bdp - fep->tx_bd_base;

		if (fep->tx_free == fep->tx_ring)
			break;

		skb = fep->tx_skbuff[dirtyidx];

		/*
		 * Check for errors.
		 */
		if (sc & (BD_ENET_TX_HB | BD_ENET_TX_LC |
			  BD_ENET_TX_RL | BD_ENET_TX_UN | BD_ENET_TX_CSL)) {

			if (sc & BD_ENET_TX_HB)	/* No heartbeat */
				fep->stats.tx_heartbeat_errors++;
			if (sc & BD_ENET_TX_LC)	/* Late collision */
				fep->stats.tx_window_errors++;
			if (sc & BD_ENET_TX_RL)	/* Retrans limit */
				fep->stats.tx_aborted_errors++;
			if (sc & BD_ENET_TX_UN)	/* Underrun */
				fep->stats.tx_fifo_errors++;
			if (sc & BD_ENET_TX_CSL)	/* Carrier lost */
				fep->stats.tx_carrier_errors++;

			if (sc & (BD_ENET_TX_LC | BD_ENET_TX_RL | BD_ENET_TX_UN)) {
				fep->stats.tx_errors++;
				do_restart = 1;
			}
		} else
			fep->stats.tx_packets++;

		if (sc & BD_ENET_TX_READY) {
			dev_warn(fep->dev,
				 "HEY! Enet xmit interrupt and TX_READY.\n");
		}

		/*
		 * Deferred means some collisions occurred during transmit,
		 * but we eventually sent the packet OK.
		 */
		if (sc & BD_ENET_TX_DEF)
			fep->stats.collisions++;

		/* unmap */
		dma_unmap_single(fep->dev, CBDR_BUFADDR(bdp),
				skb->len, DMA_TO_DEVICE);

		/*
		 * Free the sk buffer associated with this last transmit.
		 */
		dev_kfree_skb_irq(skb);
		fep->tx_skbuff[dirtyidx] = NULL;

		/*
		 * Update pointer to next buffer descriptor to be transmitted.
		 */
		if ((sc & BD_ENET_TX_WRAP) == 0)
			bdp++;
		else
			bdp = fep->tx_bd_base;

		/*
		 * Since we have freed up a buffer, the ring is no longer
		 * full.
		 */
		if (!fep->tx_free++)
			do_wake = 1;
	}

	fep->dirty_tx = bdp;

	if (do_restart)
		(*fep->ops->tx_restart)(dev);

	spin_unlock(&fep->tx_lock);

	if (do_wake)
		netif_wake_queue(dev);
}

/*
 * The typical workload of the driver:
 * Handle the network interface interrupts.
 */
static irqreturn_t sonic_interrupt(int irq, void *dev_id)
{
    struct net_device *dev = dev_id;
    struct sonic_local *lp = netdev_priv(dev);
    int status;

    if (!(status = SONIC_READ(SONIC_ISR) & SONIC_IMR_DEFAULT))
        return IRQ_NONE;

    do {
        if (status & SONIC_INT_PKTRX) {
            if (sonic_debug > 2)
                printk("%s: packet rx\n", dev->name);
            sonic_rx(dev);	/* got packet(s) */
            SONIC_WRITE(SONIC_ISR, SONIC_INT_PKTRX); /* clear the interrupt */
        }

        if (status & SONIC_INT_TXDN) {
            int entry = lp->cur_tx;
            int td_status;
            int freed_some = 0;

            /* At this point, cur_tx is the index of a TD that is one of:
             *   unallocated/freed                          (status set   & tx_skb[entry] clear)
             *   allocated and sent                         (status set   & tx_skb[entry] set  )
             *   allocated and not yet sent                 (status clear & tx_skb[entry] set  )
             *   still being allocated by sonic_send_packet (status clear & tx_skb[entry] clear)
             */

            if (sonic_debug > 2)
                printk("%s: tx done\n", dev->name);

            while (lp->tx_skb[entry] != NULL) {
                if ((td_status = sonic_tda_get(dev, entry, SONIC_TD_STATUS)) == 0)
                    break;

                if (td_status & 0x0001) {
                    lp->stats.tx_packets++;
                    lp->stats.tx_bytes += sonic_tda_get(dev, entry, SONIC_TD_PKTSIZE);
                } else {
                    lp->stats.tx_errors++;
                    if (td_status & 0x0642)
                        lp->stats.tx_aborted_errors++;
                    if (td_status & 0x0180)
                        lp->stats.tx_carrier_errors++;
                    if (td_status & 0x0020)
                        lp->stats.tx_window_errors++;
                    if (td_status & 0x0004)
                        lp->stats.tx_fifo_errors++;
                }

                /* We must free the original skb */
                dev_kfree_skb_irq(lp->tx_skb[entry]);
                lp->tx_skb[entry] = NULL;
                /* and unmap DMA buffer */
                dma_unmap_single(lp->device, lp->tx_laddr[entry], lp->tx_len[entry], DMA_TO_DEVICE);
                lp->tx_laddr[entry] = (dma_addr_t)0;
                freed_some = 1;

                if (sonic_tda_get(dev, entry, SONIC_TD_LINK) & SONIC_EOL) {
                    entry = (entry + 1) & SONIC_TDS_MASK;
                    break;
                }
                entry = (entry + 1) & SONIC_TDS_MASK;
            }

            if (freed_some || lp->tx_skb[entry] == NULL)
                netif_wake_queue(dev);  /* The ring is no longer full */
            lp->cur_tx = entry;
            SONIC_WRITE(SONIC_ISR, SONIC_INT_TXDN); /* clear the interrupt */
        }

        /*
         * check error conditions
         */
        if (status & SONIC_INT_RFO) {
            if (sonic_debug > 1)
                printk("%s: rx fifo overrun\n", dev->name);
            lp->stats.rx_fifo_errors++;
            SONIC_WRITE(SONIC_ISR, SONIC_INT_RFO); /* clear the interrupt */
        }
        if (status & SONIC_INT_RDE) {
            if (sonic_debug > 1)
                printk("%s: rx descriptors exhausted\n", dev->name);
            lp->stats.rx_dropped++;
            SONIC_WRITE(SONIC_ISR, SONIC_INT_RDE); /* clear the interrupt */
        }
        if (status & SONIC_INT_RBAE) {
            if (sonic_debug > 1)
                printk("%s: rx buffer area exceeded\n", dev->name);
            lp->stats.rx_dropped++;
            SONIC_WRITE(SONIC_ISR, SONIC_INT_RBAE); /* clear the interrupt */
        }

        /* counter overruns; all counters are 16bit wide */
        if (status & SONIC_INT_FAE) {
//.........这里部分代码省略.........

static
int receive_dmsg(struct IsdnCardState *cs)
{
	struct sk_buff *skb;
	int idx;
	int rcnt, z1, z2;
	u_char stat, cip, f1, f2;
	int chksum;
	int count=5;
	u_char *ptr;

	if (test_and_set_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags)) {
		debugl1(cs, "rec_dmsg blocked");
		return(1);
	}
	SelFiFo(cs, 4 | HFCD_REC);
	cip = HFCD_FIFO | HFCD_F1 | HFCD_REC;
	WaitNoBusy(cs);
	f1 = cs->readisac(cs, cip) & 0xf;
	cip = HFCD_FIFO | HFCD_F2 | HFCD_REC;
	WaitNoBusy(cs);
	f2 = cs->readisac(cs, cip) & 0xf;
	while ((f1 != f2) && count--) {
		z1 = ReadZReg(cs, HFCD_FIFO | HFCD_Z1 | HFCD_REC);
		z2 = ReadZReg(cs, HFCD_FIFO | HFCD_Z2 | HFCD_REC);
		rcnt = z1 - z2;
		if (rcnt < 0)
			rcnt += cs->hw.hfcD.dfifosize;
		rcnt++;
		if (cs->debug & L1_DEB_ISAC)
			debugl1(cs, "hfcd recd f1(%d) f2(%d) z1(%x) z2(%x) cnt(%d)",
				f1, f2, z1, z2, rcnt);
		idx = 0;
		cip = HFCD_FIFO | HFCD_FIFO_OUT | HFCD_REC;
		if (rcnt > MAX_DFRAME_LEN + 3) {
			if (cs->debug & L1_DEB_WARN)
				debugl1(cs, "empty_fifo d: incoming packet too large");
			while (idx < rcnt) {
				if (!(WaitNoBusy(cs)))
					break;
				ReadReg(cs, HFCD_DATA_NODEB, cip);
				idx++;
			}
		} else if (rcnt < 4) {
			if (cs->debug & L1_DEB_WARN)
				debugl1(cs, "empty_fifo d: incoming packet too small");
			while ((idx++ < rcnt) && WaitNoBusy(cs))
				ReadReg(cs, HFCD_DATA_NODEB, cip);
		} else if ((skb = dev_alloc_skb(rcnt - 3))) {
			ptr = skb_put(skb, rcnt - 3);
			while (idx < (rcnt - 3)) {
				if (!(WaitNoBusy(cs)))
					break;
				*ptr = ReadReg(cs, HFCD_DATA_NODEB, cip);
				idx++;
				ptr++;
			}
			if (idx != (rcnt - 3)) {
				debugl1(cs, "RFIFO D BUSY error");
				printk(KERN_WARNING "HFC DFIFO channel BUSY Error\n");
				dev_kfree_skb_irq(skb);
				skb = NULL;
#ifdef ERROR_STATISTIC
				cs->err_rx++;
#endif
			} else {
				WaitNoBusy(cs);
				chksum = (ReadReg(cs, HFCD_DATA, cip) << 8);
				WaitNoBusy(cs);
				chksum += ReadReg(cs, HFCD_DATA, cip);
				WaitNoBusy(cs);
				stat = ReadReg(cs, HFCD_DATA, cip);
				if (cs->debug & L1_DEB_ISAC)
					debugl1(cs, "empty_dfifo chksum %x stat %x",
						chksum, stat);
				if (stat) {
					debugl1(cs, "FIFO CRC error");
					dev_kfree_skb_irq(skb);
					skb = NULL;
#ifdef ERROR_STATISTIC
					cs->err_crc++;
#endif
				} else {
					skb_queue_tail(&cs->rq, skb);
					schedule_event(cs, D_RCVBUFREADY);
				}
			}
		} else
			printk(KERN_WARNING "HFC: D receive out of memory\n");
		WaitForBusy(cs);
		cip = HFCD_FIFO | HFCD_F2_INC | HFCD_REC;
		WaitNoBusy(cs);
		stat = ReadReg(cs, HFCD_DATA, cip);
		WaitForBusy(cs);
		cip = HFCD_FIFO | HFCD_F2 | HFCD_REC;
		WaitNoBusy(cs);
		f2 = cs->readisac(cs, cip) & 0xf;
	}
	test_and_clear_bit(FLG_LOCK_ATOMIC, &cs->HW_Flags);
	return(1);
//.........这里部分代码省略.........

static inline void
Memhscx_interrupt(struct IsdnCardState *cs, u_char val, u_char hscx)
{
	u_char r;
	struct BCState *bcs = cs->bcs + hscx;
	struct sk_buff *skb;
	int fifo_size = test_bit(HW_IPAC, &cs->HW_Flags)? 64: 32;
	int count;

	if (!test_bit(BC_FLG_INIT, &bcs->Flag))
		return;

	if (val & 0x80) {	/* RME */
		r = MemReadHSCX(cs, hscx, HSCX_RSTA);
		if ((r & 0xf0) != 0xa0) {
			if (!(r & 0x80))
				if (cs->debug & L1_DEB_WARN)
					debugl1(cs, "HSCX invalid frame");
			if ((r & 0x40) && bcs->mode)
				if (cs->debug & L1_DEB_WARN)
					debugl1(cs, "HSCX RDO mode=%d",
						bcs->mode);
			if (!(r & 0x20))
				if (cs->debug & L1_DEB_WARN)
					debugl1(cs, "HSCX CRC error");
			MemWriteHSCXCMDR(cs, hscx, 0x80);
		} else {
			count = MemReadHSCX(cs, hscx, HSCX_RBCL) & (
				test_bit(HW_IPAC, &cs->HW_Flags)? 0x3f: 0x1f);
			if (count == 0)
				count = fifo_size;
			Memhscx_empty_fifo(bcs, count);
			if ((count = bcs->hw.hscx.rcvidx - 1) > 0) {
				if (cs->debug & L1_DEB_HSCX_FIFO)
					debugl1(cs, "HX Frame %d", count);
				if (!(skb = dev_alloc_skb(count)))
					printk(KERN_WARNING "HSCX: receive out of memory\n");
				else {
					memcpy(skb_put(skb, count), bcs->hw.hscx.rcvbuf, count);
					skb_queue_tail(&bcs->rqueue, skb);
				}
			}
		}
		bcs->hw.hscx.rcvidx = 0;
		hscx_sched_event(bcs, B_RCVBUFREADY);
	}
	if (val & 0x40) {	/* RPF */
		Memhscx_empty_fifo(bcs, fifo_size);
		if (bcs->mode == L1_MODE_TRANS) {
			/* receive audio data */
			if (!(skb = dev_alloc_skb(fifo_size)))
				printk(KERN_WARNING "HiSax: receive out of memory\n");
			else {
				memcpy(skb_put(skb, fifo_size), bcs->hw.hscx.rcvbuf, fifo_size);
				skb_queue_tail(&bcs->rqueue, skb);
			}
			bcs->hw.hscx.rcvidx = 0;
			hscx_sched_event(bcs, B_RCVBUFREADY);
		}
	}
	if (val & 0x10) {	/* XPR */
		if (bcs->tx_skb) {
			if (bcs->tx_skb->len) {
				Memhscx_fill_fifo(bcs);
				return;
			} else {
				if (bcs->st->lli.l1writewakeup &&
					(PACKET_NOACK != bcs->tx_skb->pkt_type))
					bcs->st->lli.l1writewakeup(bcs->st, bcs->hw.hscx.count);
				dev_kfree_skb_irq(bcs->tx_skb);
				bcs->hw.hscx.count = 0; 
				bcs->tx_skb = NULL;
			}
		}
		if ((bcs->tx_skb = skb_dequeue(&bcs->squeue))) {
			bcs->hw.hscx.count = 0;
			test_and_set_bit(BC_FLG_BUSY, &bcs->Flag);
			Memhscx_fill_fifo(bcs);
		} else {
			test_and_clear_bit(BC_FLG_BUSY, &bcs->Flag);
			hscx_sched_event(bcs, B_XMTBUFREADY);
		}
	}
}

static void mc32_tx_ring(struct net_device *dev) 
{
	struct mc32_local *lp = netdev_priv(dev);
	volatile struct skb_header *np;

	/*
	 * We rely on head==tail to mean 'queue empty'.
	 * This is why lp->tx_count=TX_RING_LEN-1: in order to prevent
	 * tx_ring_head wrapping to tail and confusing a 'queue empty'
	 * condition with 'queue full'
	 */

	while (lp->tx_ring_tail != atomic_read(&lp->tx_ring_head))  
	{   
		u16 t; 

		t=next_tx(lp->tx_ring_tail); 
		np=lp->tx_ring[t].p; 

		if(!(np->status & (1<<7))) 
		{
			/* Not COMPLETED */ 
			break; 
		} 
		lp->net_stats.tx_packets++;
		if(!(np->status & (1<<6))) /* Not COMPLETED_OK */
		{
			lp->net_stats.tx_errors++;   

			switch(np->status&0x0F)
			{
				case 1:
					lp->net_stats.tx_aborted_errors++;
					break; /* Max collisions */ 
				case 2:
					lp->net_stats.tx_fifo_errors++;
					break;
				case 3:
					lp->net_stats.tx_carrier_errors++;
					break;
				case 4:
					lp->net_stats.tx_window_errors++;
					break;  /* CTS Lost */ 
				case 5:
					lp->net_stats.tx_aborted_errors++;
					break; /* Transmit timeout */ 
			}
		}
		/* Packets are sent in order - this is
		    basically a FIFO queue of buffers matching
		    the card ring */
		lp->net_stats.tx_bytes+=lp->tx_ring[t].skb->len;
		dev_kfree_skb_irq(lp->tx_ring[t].skb);
		lp->tx_ring[t].skb=NULL;
		atomic_inc(&lp->tx_count);
		netif_wake_queue(dev);

		lp->tx_ring_tail=t; 
	}

} 

//.........这里部分代码省略.........
			cs->BC_Write_Reg(cs, bchan, W_B_CMDR, W_B_CMDR_RACK | W_B_CMDR_RRST | W_B_CMDR_RACT);
		} else {
			count = cs->BC_Read_Reg(cs, bchan, W_B_RBCL) & (W_B_FIFO_THRESH - 1);
			if (count == 0)
				count = W_B_FIFO_THRESH;
			W6692B_empty_fifo(bcs, count);
			if ((count = bcs->hw.w6692.rcvidx) > 0) {
				if (cs->debug & L1_DEB_HSCX_FIFO)
					debugl1(cs, "W6692 Bchan Frame %d", count);
				if (!(skb = dev_alloc_skb(count)))
					printk(KERN_WARNING "W6692: Bchan receive out of memory\n");
				else {
					memcpy(skb_put(skb, count), bcs->hw.w6692.rcvbuf, count);
					skb_queue_tail(&bcs->rqueue, skb);
				}
			}
		}
		bcs->hw.w6692.rcvidx = 0;
		schedule_event(bcs, B_RCVBUFREADY);
	}
	if (val & W_B_EXI_RMR) {	/* RMR */
		W6692B_empty_fifo(bcs, W_B_FIFO_THRESH);
		r = cs->BC_Read_Reg(cs, bchan, W_B_STAR);
		if (r & W_B_STAR_RDOV) {
			if (cs->debug & L1_DEB_WARN)
				debugl1(cs, "W6692 B RDOV(RMR) mode=%d",bcs->mode);
			cs->BC_Write_Reg(cs, bchan, W_B_CMDR, W_B_CMDR_RACK | W_B_CMDR_RRST | W_B_CMDR_RACT);
			if (bcs->mode != L1_MODE_TRANS)
				bcs->hw.w6692.rcvidx = 0;
		}
		if (bcs->mode == L1_MODE_TRANS) {
			/* receive audio data */
			if (!(skb = dev_alloc_skb(W_B_FIFO_THRESH)))
				printk(KERN_WARNING "HiSax: receive out of memory\n");
			else {
				memcpy(skb_put(skb, W_B_FIFO_THRESH), bcs->hw.w6692.rcvbuf, W_B_FIFO_THRESH);
				skb_queue_tail(&bcs->rqueue, skb);
			}
			bcs->hw.w6692.rcvidx = 0;
			schedule_event(bcs, B_RCVBUFREADY);
		}
	}
	if (val & W_B_EXI_XDUN) {	/* XDUN */
		cs->BC_Write_Reg(cs, bchan, W_B_CMDR, W_B_CMDR_XRST | W_B_CMDR_RACT);
		if (cs->debug & L1_DEB_WARN)
			debugl1(cs, "W6692 B EXIR %x Lost TX", val);
		if (bcs->mode == 1)
			W6692B_fill_fifo(bcs);
		else {
			/* Here we lost an TX interrupt, so
			   * restart transmitting the whole frame.
			 */
			if (bcs->tx_skb) {
				skb_push(bcs->tx_skb, bcs->hw.w6692.count);
				bcs->tx_cnt += bcs->hw.w6692.count;
				bcs->hw.w6692.count = 0;
			}
		}
		return;
	}
	if (val & W_B_EXI_XFR) {	/* XFR */
		r = cs->BC_Read_Reg(cs, bchan, W_B_STAR);
		if (r & W_B_STAR_XDOW) {
			if (cs->debug & L1_DEB_WARN)
				debugl1(cs, "W6692 B STAR %x XDOW", r);
			cs->BC_Write_Reg(cs, bchan, W_B_CMDR, W_B_CMDR_XRST | W_B_CMDR_RACT);
			if (bcs->tx_skb && (bcs->mode != 1)) {
				skb_push(bcs->tx_skb, bcs->hw.w6692.count);
				bcs->tx_cnt += bcs->hw.w6692.count;
				bcs->hw.w6692.count = 0;
			}
		}
		if (bcs->tx_skb) {
			if (bcs->tx_skb->len) {
				W6692B_fill_fifo(bcs);
				return;
			} else {
				if (test_bit(FLG_LLI_L1WAKEUP,&bcs->st->lli.flag) &&
					(PACKET_NOACK != bcs->tx_skb->pkt_type)) {
					u_long	flags;
					spin_lock_irqsave(&bcs->aclock, flags);
					bcs->ackcnt += bcs->hw.w6692.count;
					spin_unlock_irqrestore(&bcs->aclock, flags);
					schedule_event(bcs, B_ACKPENDING);
				}
				dev_kfree_skb_irq(bcs->tx_skb);
				bcs->hw.w6692.count = 0;
				bcs->tx_skb = NULL;
			}
		}
		if ((bcs->tx_skb = skb_dequeue(&bcs->squeue))) {
			bcs->hw.w6692.count = 0;
			test_and_set_bit(BC_FLG_BUSY, &bcs->Flag);
			W6692B_fill_fifo(bcs);
		} else {
			test_and_clear_bit(BC_FLG_BUSY, &bcs->Flag);
			schedule_event(bcs, B_XMTBUFREADY);
		}
	}
}

/**
 * Transmit a packet.
 * This is a helper function for ctcm_tx().
 *
 *  ch		Channel to be used for sending.
 *  skb		Pointer to struct sk_buff of packet to send.
 *            The linklevel header has already been set up
 *            by ctcm_tx().
 *
 * returns 0 on success, -ERRNO on failure. (Never fails.)
 */
static int ctcm_transmit_skb(struct channel *ch, struct sk_buff *skb)
{
	unsigned long saveflags;
	struct ll_header header;
	int rc = 0;
	__u16 block_len;
	int ccw_idx;
	struct sk_buff *nskb;
	unsigned long hi;

	/* we need to acquire the lock for testing the state
	 * otherwise we can have an IRQ changing the state to
	 * TXIDLE after the test but before acquiring the lock.
	 */
	spin_lock_irqsave(&ch->collect_lock, saveflags);
	if (fsm_getstate(ch->fsm) != CTC_STATE_TXIDLE) {
		int l = skb->len + LL_HEADER_LENGTH;

		if (ch->collect_len + l > ch->max_bufsize - 2) {
			spin_unlock_irqrestore(&ch->collect_lock, saveflags);
			return -EBUSY;
		} else {
			atomic_inc(&skb->users);
			header.length = l;
			header.type = skb->protocol;
			header.unused = 0;
			memcpy(skb_push(skb, LL_HEADER_LENGTH), &header,
			       LL_HEADER_LENGTH);
			skb_queue_tail(&ch->collect_queue, skb);
			ch->collect_len += l;
		}
		spin_unlock_irqrestore(&ch->collect_lock, saveflags);
				goto done;
	}
	spin_unlock_irqrestore(&ch->collect_lock, saveflags);
	/*
	 * Protect skb against beeing free'd by upper
	 * layers.
	 */
	atomic_inc(&skb->users);
	ch->prof.txlen += skb->len;
	header.length = skb->len + LL_HEADER_LENGTH;
	header.type = skb->protocol;
	header.unused = 0;
	memcpy(skb_push(skb, LL_HEADER_LENGTH), &header, LL_HEADER_LENGTH);
	block_len = skb->len + 2;
	*((__u16 *)skb_push(skb, 2)) = block_len;

	/*
	 * IDAL support in CTCM is broken, so we have to
	 * care about skb's above 2G ourselves.
	 */
	hi = ((unsigned long)skb_tail_pointer(skb) + LL_HEADER_LENGTH) >> 31;
	if (hi) {
		nskb = alloc_skb(skb->len, GFP_ATOMIC | GFP_DMA);
		if (!nskb) {
			atomic_dec(&skb->users);
			skb_pull(skb, LL_HEADER_LENGTH + 2);
			ctcm_clear_busy(ch->netdev);
			return -ENOMEM;
		} else {
			memcpy(skb_put(nskb, skb->len), skb->data, skb->len);
			atomic_inc(&nskb->users);
			atomic_dec(&skb->users);
			dev_kfree_skb_irq(skb);
			skb = nskb;
		}
	}

	ch->ccw[4].count = block_len;
	if (set_normalized_cda(&ch->ccw[4], skb->data)) {
		/*
		 * idal allocation failed, try via copying to
		 * trans_skb. trans_skb usually has a pre-allocated
		 * idal.
		 */
		if (ctcm_checkalloc_buffer(ch)) {
			/*
			 * Remove our header. It gets added
			 * again on retransmit.
			 */
			atomic_dec(&skb->users);
			skb_pull(skb, LL_HEADER_LENGTH + 2);
			ctcm_clear_busy(ch->netdev);
			return -ENOMEM;
		}

		skb_reset_tail_pointer(ch->trans_skb);
		ch->trans_skb->len = 0;
//.........这里部分代码省略.........

/* The interrupt handler does all of the Rx thread work and cleans up
   after the Tx thread. */
static void intr_handler(int irq, void *dev_instance, struct pt_regs *rgs)
{
	struct net_device *dev = (struct net_device *)dev_instance;
	struct netdev_private *np;
	long ioaddr;
	int boguscnt = max_interrupt_work;

	ioaddr = dev->base_addr;
	np = dev->priv;
	spin_lock(&np->lock);

	do {
		int intr_status = readw(ioaddr + IntrStatus);
		writew(intr_status & (IntrRxDone | IntrRxDMADone | IntrPCIErr |
			IntrDrvRqst | IntrTxDone | IntrTxDMADone | StatsMax | 
			LinkChange), ioaddr + IntrStatus);

		if (debug > 4)
			printk(KERN_DEBUG "%s: Interrupt, status %4.4x.\n",
				   dev->name, intr_status);

		if (intr_status == 0)
			break;

		if (intr_status & (IntrRxDone|IntrRxDMADone))
			netdev_rx(dev);

		if (intr_status & IntrTxDone) {
			int boguscnt = 32;
			int tx_status = readw(ioaddr + TxStatus);
			while (tx_status & 0x80) {
				if (debug > 4)
					printk("%s: Transmit status is %2.2x.\n",
						   dev->name, tx_status);
				if (tx_status & 0x1e) {
					np->stats.tx_errors++;
					if (tx_status & 0x10)  np->stats.tx_fifo_errors++;
#ifdef ETHER_STATS
					if (tx_status & 0x08)  np->stats.collisions16++;
#else
					if (tx_status & 0x08)  np->stats.collisions++;
#endif
					if (tx_status & 0x04)  np->stats.tx_fifo_errors++;
					if (tx_status & 0x02)  np->stats.tx_window_errors++;
					/* This reset has not been verified!. */
					if (tx_status & 0x10) {			/* Reset the Tx. */
						writew(0x001c, ioaddr + ASICCtrl + 2);
#if 0					/* Do we need to reset the Tx pointer here? */
						writel(np->tx_ring_dma
							+ np->dirty_tx*sizeof(*np->tx_ring),
							dev->base_addr + TxListPtr);
#endif
					}
					if (tx_status & 0x1e) 		/* Restart the Tx. */
						writew(TxEnable, ioaddr + MACCtrl1);
				}
				/* Yup, this is a documentation bug.  It cost me *hours*. */
				writew(0, ioaddr + TxStatus);
				tx_status = readb(ioaddr + TxStatus);
				if (--boguscnt < 0)
					break;
			}
		}
		for (; np->cur_tx - np->dirty_tx > 0; np->dirty_tx++) {
			int entry = np->dirty_tx % TX_RING_SIZE;
			struct sk_buff *skb;

			if ( ! (np->tx_ring[entry].status & 0x00010000))
				break;
			skb = np->tx_skbuff[entry];
			/* Free the original skb. */
			pci_unmap_single(np->pci_dev, 
				np->tx_ring[entry].frag[0].addr, 
				skb->len, PCI_DMA_TODEVICE);
			dev_kfree_skb_irq(skb);
			np->tx_skbuff[entry] = 0;
		}
		if (np->tx_full
			&& np->cur_tx - np->dirty_tx < TX_QUEUE_LEN - 4) {
			/* The ring is no longer full, clear tbusy. */
			np->tx_full = 0;
			netif_wake_queue(dev);
		}

		/* Abnormal error summary/uncommon events handlers. */
		if (intr_status & (IntrDrvRqst | IntrPCIErr | LinkChange | StatsMax))
			netdev_error(dev, intr_status);
		if (--boguscnt < 0) {
			get_stats(dev);
			if (debug > 1) 
				printk(KERN_WARNING "%s: Too much work at interrupt, "
				   "status=0x%4.4x / 0x%4.4x.\n",
				   dev->name, intr_status, readw(ioaddr + IntrClear));
			/* Re-enable us in 3.2msec. */
			writew(0, ioaddr + IntrEnable);
			writew(1000, ioaddr + DownCounter);
			writew(IntrDrvRqst, ioaddr + IntrEnable);
			break;
//.........这里部分代码省略.........

struct sk_buff *acd_venet_drop_rx(acd_venet_rx_info_t *info)
{
    dev_kfree_skb_irq(info->avri_skb);
    info->avri_skb = NULL;
    return NULL;
}

static irqreturn_t
W6692_interrupt(int intno, void *dev_id)
{
	struct IsdnCardState	*cs = dev_id;
	u_char			val, exval, v1;
	struct sk_buff		*skb;
	u_int			count;
	u_long			flags;
	int			icnt = 5;

	spin_lock_irqsave(&cs->lock, flags);
	val = cs->readW6692(cs, W_ISTA);
	if (!val) {
		spin_unlock_irqrestore(&cs->lock, flags);
		return IRQ_NONE;
	}
      StartW6692:
	if (cs->debug & L1_DEB_ISAC)
		debugl1(cs, "W6692 ISTA %x", val);

	if (val & W_INT_D_RME) {	/* RME */
		exval = cs->readW6692(cs, W_D_RSTA);
		if (exval & (W_D_RSTA_RDOV | W_D_RSTA_CRCE | W_D_RSTA_RMB)) {
			if (exval & W_D_RSTA_RDOV)
				if (cs->debug & L1_DEB_WARN)
					debugl1(cs, "W6692 RDOV");
			if (exval & W_D_RSTA_CRCE)
				if (cs->debug & L1_DEB_WARN)
					debugl1(cs, "W6692 D-channel CRC error");
			if (exval & W_D_RSTA_RMB)
				if (cs->debug & L1_DEB_WARN)
					debugl1(cs, "W6692 D-channel ABORT");
			cs->writeW6692(cs, W_D_CMDR, W_D_CMDR_RACK | W_D_CMDR_RRST);
		} else {
			count = cs->readW6692(cs, W_D_RBCL) & (W_D_FIFO_THRESH - 1);
			if (count == 0)
				count = W_D_FIFO_THRESH;
			W6692_empty_fifo(cs, count);
			if ((count = cs->rcvidx) > 0) {
				cs->rcvidx = 0;
				if (!(skb = alloc_skb(count, GFP_ATOMIC)))
					printk(KERN_WARNING "HiSax: D receive out of memory\n");
				else {
					memcpy(skb_put(skb, count), cs->rcvbuf, count);
					skb_queue_tail(&cs->rq, skb);
				}
			}
		}
		cs->rcvidx = 0;
		schedule_event(cs, D_RCVBUFREADY);
	}
	if (val & W_INT_D_RMR) {	/* RMR */
		W6692_empty_fifo(cs, W_D_FIFO_THRESH);
	}
	if (val & W_INT_D_XFR) {	/* XFR */
		if (test_and_clear_bit(FLG_DBUSY_TIMER, &cs->HW_Flags))
			del_timer(&cs->dbusytimer);
		if (test_and_clear_bit(FLG_L1_DBUSY, &cs->HW_Flags))
			schedule_event(cs, D_CLEARBUSY);
		if (cs->tx_skb) {
			if (cs->tx_skb->len) {
				W6692_fill_fifo(cs);
				goto afterXFR;
			} else {
				dev_kfree_skb_irq(cs->tx_skb);
				cs->tx_cnt = 0;
				cs->tx_skb = NULL;
			}
		}
		if ((cs->tx_skb = skb_dequeue(&cs->sq))) {
			cs->tx_cnt = 0;
			W6692_fill_fifo(cs);
		} else
			schedule_event(cs, D_XMTBUFREADY);
	}
      afterXFR:
	if (val & (W_INT_XINT0 | W_INT_XINT1)) {	/* XINT0/1 - never */
		if (cs->debug & L1_DEB_ISAC)
			debugl1(cs, "W6692 spurious XINT!");
	}
	if (val & W_INT_D_EXI) {	/* EXI */
		exval = cs->readW6692(cs, W_D_EXIR);
		if (cs->debug & L1_DEB_WARN)
			debugl1(cs, "W6692 D_EXIR %02x", exval);
		if (exval & (W_D_EXI_XDUN | W_D_EXI_XCOL)) {	/* Transmit underrun/collision */
			debugl1(cs, "W6692 D-chan underrun/collision");
			printk(KERN_WARNING "HiSax: W6692 XDUN/XCOL\n");
			if (test_and_clear_bit(FLG_DBUSY_TIMER, &cs->HW_Flags))
				del_timer(&cs->dbusytimer);
			if (test_and_clear_bit(FLG_L1_DBUSY, &cs->HW_Flags))
				schedule_event(cs, D_CLEARBUSY);
			if (cs->tx_skb) {	/* Restart frame */
				skb_push(cs->tx_skb, cs->tx_cnt);
				cs->tx_cnt = 0;
				W6692_fill_fifo(cs);
			} else {
				printk(KERN_WARNING "HiSax: W6692 XDUN/XCOL no skb\n");
				debugl1(cs, "W6692 XDUN/XCOL no skb");
				cs->writeW6692(cs, W_D_CMDR, W_D_CMDR_XRST);
			}
//.........这里部分代码省略.........

/* Called in soft-irq context */
static void smd_net_data_handler(unsigned long arg)
{
	struct net_device *dev = (struct net_device *) arg;
	struct rmnet_private *p = netdev_priv(dev);
	struct sk_buff *skb;
	void *ptr = 0;
	int sz;
	u32 opmode = p->operation_mode;
	unsigned long flags;

	for (;;) {
		sz = smd_cur_packet_size(p->ch);
		if (sz == 0) break;
		if (smd_read_avail(p->ch) < sz) break;

		if (RMNET_IS_MODE_IP(opmode) ? (sz > dev->mtu) :
						(sz > (dev->mtu + ETH_HLEN))) {
			pr_err("rmnet_recv() discarding %d len (%d mtu)\n",
				sz, RMNET_IS_MODE_IP(opmode) ?
					dev->mtu : (dev->mtu + ETH_HLEN));
			ptr = 0;
		} else {
			skb = dev_alloc_skb(sz + NET_IP_ALIGN);
			if (skb == NULL) {
				pr_err("rmnet_recv() cannot allocate skb\n");
			} else {
				skb->dev = dev;
				skb_reserve(skb, NET_IP_ALIGN);
				ptr = skb_put(skb, sz);
				wake_lock_timeout(&p->wake_lock, HZ / 2);
				if (smd_read(p->ch, ptr, sz) != sz) {
					pr_err("rmnet_recv() smd lied about avail?!");
					ptr = 0;
					dev_kfree_skb_irq(skb);
				} else {
					/* Handle Rx frame format */
					spin_lock_irqsave(&p->lock, flags);
					opmode = p->operation_mode;
					spin_unlock_irqrestore(&p->lock, flags);

					if (RMNET_IS_MODE_IP(opmode)) {
						/* Driver in IP mode */
						skb->protocol =
						  rmnet_ip_type_trans(skb, dev);
					} else {
						/* Driver in Ethernet mode */
						skb->protocol =
						  eth_type_trans(skb, dev);
					}
					if (RMNET_IS_MODE_IP(opmode) ||
					    count_this_packet(ptr, skb->len)) {
#if 0
						p->wakeups_rcv +=
							rmnet_cause_wakeup(p);
#endif
						p->stats.rx_packets++;
						p->stats.rx_bytes += skb->len;
					}
					netif_rx(skb);
				}
				continue;
			}
		}
		if (smd_read(p->ch, ptr, sz) != sz)
			pr_err("rmnet_recv() smd lied about avail?!");
	}
}

void
icc_interrupt(struct IsdnCardState *cs, u_char val)
{
	u_char exval, v1;
	struct sk_buff *skb;
	unsigned int count;

	if (cs->debug & L1_DEB_ISAC)
		debugl1(cs, "ICC interrupt %x", val);
	if (val & 0x80) {	/* RME */
		exval = cs->readisac(cs, ICC_RSTA);
		if ((exval & 0x70) != 0x20) {
			if (exval & 0x40) {
				if (cs->debug & L1_DEB_WARN)
					debugl1(cs, "ICC RDO");
#ifdef ERROR_STATISTIC
				cs->err_rx++;
#endif
			}
			if (!(exval & 0x20)) {
				if (cs->debug & L1_DEB_WARN)
					debugl1(cs, "ICC CRC error");
#ifdef ERROR_STATISTIC
				cs->err_crc++;
#endif
			}
			cs->writeisac(cs, ICC_CMDR, 0x80);
		} else {
			count = cs->readisac(cs, ICC_RBCL) & 0x1f;
			if (count == 0)
				count = 32;
			icc_empty_fifo(cs, count);
			if ((count = cs->rcvidx) > 0) {
				cs->rcvidx = 0;
				if (!(skb = alloc_skb(count, GFP_ATOMIC)))
					printk(KERN_WARNING "HiSax: D receive out of memory\n");
				else {
					memcpy(skb_put(skb, count), cs->rcvbuf, count);
					skb_queue_tail(&cs->rq, skb);
				}
			}
		}
		cs->rcvidx = 0;
		schedule_event(cs, D_RCVBUFREADY);
	}
	if (val & 0x40) {	/* RPF */
		icc_empty_fifo(cs, 32);
	}
	if (val & 0x20) {	/* RSC */
		/* never */
		if (cs->debug & L1_DEB_WARN)
			debugl1(cs, "ICC RSC interrupt");
	}
	if (val & 0x10) {	/* XPR */
		if (test_and_clear_bit(FLG_DBUSY_TIMER, &cs->HW_Flags))
			del_timer(&cs->dbusytimer);
		if (test_and_clear_bit(FLG_L1_DBUSY, &cs->HW_Flags))
			schedule_event(cs, D_CLEARBUSY);
		if (cs->tx_skb) {
			if (cs->tx_skb->len) {
				icc_fill_fifo(cs);
				goto afterXPR;
			} else {
				dev_kfree_skb_irq(cs->tx_skb);
				cs->tx_cnt = 0;
				cs->tx_skb = NULL;
			}
		}
		if ((cs->tx_skb = skb_dequeue(&cs->sq))) {
			cs->tx_cnt = 0;
			icc_fill_fifo(cs);
		} else
			schedule_event(cs, D_XMTBUFREADY);
	}
      afterXPR:
	if (val & 0x04) {	/* CISQ */
		exval = cs->readisac(cs, ICC_CIR0);
		if (cs->debug & L1_DEB_ISAC)
			debugl1(cs, "ICC CIR0 %02X", exval );
		if (exval & 2) {
			cs->dc.icc.ph_state = (exval >> 2) & 0xf;
			if (cs->debug & L1_DEB_ISAC)
				debugl1(cs, "ph_state change %x", cs->dc.icc.ph_state);
			schedule_event(cs, D_L1STATECHANGE);
		}

//.........这里部分代码省略.........
                }
                /* remove damaged data from fifo */
		Amd7930_empty_Dfifo(cs, 1);

		if (test_and_clear_bit(FLG_DBUSY_TIMER, &cs->HW_Flags))
			del_timer(&cs->dbusytimer);
		if (test_and_clear_bit(FLG_L1_DBUSY, &cs->HW_Flags))
			schedule_event(cs, D_CLEARBUSY);
                /* restart TX-Frame */
                if (cs->tx_skb) {
			skb_push(cs->tx_skb, cs->tx_cnt);
			cs->tx_cnt = 0;
                        cs->dc.amd7930.tx_xmtlen = 0;
			Amd7930_fill_Dfifo(cs);
		}
	}

        /* D TX FIFO empty -> fill */
	if (irflags & 1) {
		if (cs->debug & L1_DEB_ISAC)
			debugl1(cs, "Amd7930: interrupt: clear Timer and fill D-TX-FIFO if data");

		/* AMD interrupts off */
                AmdIrqOff(cs);

                if (test_and_clear_bit(FLG_DBUSY_TIMER, &cs->HW_Flags))
			del_timer(&cs->dbusytimer);
		if (test_and_clear_bit(FLG_L1_DBUSY, &cs->HW_Flags))
			schedule_event(cs, D_CLEARBUSY);
		if (cs->tx_skb) {
			if (cs->tx_skb->len)
				Amd7930_fill_Dfifo(cs);
		}
		/* AMD interrupts on */
                AmdIrqOn(cs);
	}


        /* D RX FIFO full or tiny packet in Fifo -> empty */
	if ((irflags & 2) || (dsr1 & 2)) {
                if (cs->debug & L1_DEB_ISAC)
			debugl1(cs, "Amd7930: interrupt: empty D-FIFO");
                Amd7930_empty_Dfifo(cs, 0);
	}


        /* D-Frame transmit complete */
	if (dsr1 & 64) {
		if (cs->debug & L1_DEB_ISAC) {
			debugl1(cs, "Amd7930: interrupt: transmit packet ready");
        	}
		/* AMD interrupts off */
                AmdIrqOff(cs);

                if (test_and_clear_bit(FLG_DBUSY_TIMER, &cs->HW_Flags))
			del_timer(&cs->dbusytimer);
		if (test_and_clear_bit(FLG_L1_DBUSY, &cs->HW_Flags))
			schedule_event(cs, D_CLEARBUSY);

                if (cs->tx_skb) {
        		if (cs->debug & L1_DEB_ISAC)
	        		debugl1(cs, "Amd7930: interrupt: TX-Packet ready, freeing skb");
                        dev_kfree_skb_irq(cs->tx_skb);
			cs->tx_cnt = 0;
                        cs->dc.amd7930.tx_xmtlen=0;
			cs->tx_skb = NULL;
                }
                if ((cs->tx_skb = skb_dequeue(&cs->sq))) {
        		if (cs->debug & L1_DEB_ISAC)
	        		debugl1(cs, "Amd7930: interrupt: TX-Packet ready, next packet dequeued");
	        	cs->tx_cnt = 0;
                        cs->dc.amd7930.tx_xmtlen=0;
			Amd7930_fill_Dfifo(cs);
		}
                else
			schedule_event(cs, D_XMTBUFREADY);
		/* AMD interrupts on */
                AmdIrqOn(cs);
        }

	/* LIU status interrupt -> read LSR, check statechanges */
	if (lsr & 0x38) {
                /* AMD interrupts off */
                AmdIrqOff(cs);

		if (cs->debug & L1_DEB_ISAC)
			debugl1(cs, "Amd: interrupt: LSR=0x%02X, LIU is in state %d", lsr, ((lsr & 0x7) +2));

		cs->dc.amd7930.ph_state = (lsr & 0x7) + 2;

		schedule_event(cs, D_L1STATECHANGE);
		/* AMD interrupts on */
                AmdIrqOn(cs);
	}

        /* reads Interrupt-Register again. If there is a new interrupt-flag: restart handler */
        irflags = rByteAMD(cs, 0x00);
 }

}