Commit message: farsync: fix info leak in ioctl

The fst_get_iface() code fails to initialize the two padding bytes of
struct sync_serial_settings after the ->loopback member. Add an explicit
memset(0) before filling the structure to avoid the info leak.

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
CVE: CVE-2014-1444
CWE: CWE-399
Vulnerability description: The fst_get_iface function in drivers/net/wan/farsync.c in the Linux kernel before 3.11.7 does not properly initialize a certain data structure, which allows local users to obtain sensitive information from kernel memory by leveraging the CAP_NET_ADMIN capability for an SIOCWANDEV ioctl call.

Project: linux

check_started_ok(struct fst_card_info *card)
{
	int i;

	/* Check structure version and end marker */
	if (FST_RDW(card, smcVersion) != SMC_VERSION) {
		pr_err("Bad shared memory version %d expected %d\n",
		       FST_RDW(card, smcVersion), SMC_VERSION);
		card->state = FST_BADVERSION;
		return;
	}
	if (FST_RDL(card, endOfSmcSignature) != END_SIG) {
		pr_err("Missing shared memory signature\n");
		card->state = FST_BADVERSION;
		return;
	}
	/* Firmware status flag, 0x00 = initialising, 0x01 = OK, 0xFF = fail */
	if ((i = FST_RDB(card, taskStatus)) == 0x01) {
		card->state = FST_RUNNING;
	} else if (i == 0xFF) {
		pr_err("Firmware initialisation failed. Card halted\n");
		card->state = FST_HALTED;
		return;
	} else if (i != 0x00) {
		pr_err("Unknown firmware status 0x%x\n", i);
		card->state = FST_HALTED;
		return;
	}

	/* Finally check the number of ports reported by firmware against the
	 * number we assumed at card detection. Should never happen with
	 * existing firmware etc so we just report it for the moment.
	 */
	if (FST_RDL(card, numberOfPorts) != card->nports) {
		pr_warn("Port count mismatch on card %d.  Firmware thinks %d we say %d\n",
			card->card_no,
			FST_RDL(card, numberOfPorts), card->nports);
	}
}

Project: linux

do_bottom_half_rx(struct fst_card_info *card)
{
	struct fst_port_info *port;
	int pi;
	int rx_count = 0;

	/* Check for rx completions on all ports on this card */
	dbg(DBG_RX, "do_bottom_half_rx\n");
	for (pi = 0, port = card->ports; pi < card->nports; pi++, port++) {
		if (!port->run)
			continue;

		while (!(FST_RDB(card, rxDescrRing[pi][port->rxpos].bits)
			 & DMA_OWN) && !(card->dmarx_in_progress)) {
			if (rx_count > fst_max_reads) {
				/*
				 * Don't spend forever in receive processing
				 * Schedule another event
				 */
				fst_q_work_item(&fst_work_intq, card->card_no);
				tasklet_schedule(&fst_int_task);
				break;	/* Leave the loop */
			}
			fst_intr_rx(card, port);
			rx_count++;
		}
	}
}

Project: linux

do_bottom_half_tx(struct fst_card_info *card)
{
	struct fst_port_info *port;
	int pi;
	int txq_length;
	struct sk_buff *skb;
	unsigned long flags;
	struct net_device *dev;

	/*
	 *  Find a free buffer for the transmit
	 *  Step through each port on this card
	 */

	dbg(DBG_TX, "do_bottom_half_tx\n");
	for (pi = 0, port = card->ports; pi < card->nports; pi++, port++) {
		if (!port->run)
			continue;

		dev = port_to_dev(port);
		while (!(FST_RDB(card, txDescrRing[pi][port->txpos].bits) &
			 DMA_OWN) &&
		       !(card->dmatx_in_progress)) {
			/*
			 * There doesn't seem to be a txdone event per-se
			 * We seem to have to deduce it, by checking the DMA_OWN
			 * bit on the next buffer we think we can use
			 */
			spin_lock_irqsave(&card->card_lock, flags);
			if ((txq_length = port->txqe - port->txqs) < 0) {
				/*
				 * This is the case where one has wrapped and the
				 * maths gives us a negative number
				 */
				txq_length = txq_length + FST_TXQ_DEPTH;
			}
			spin_unlock_irqrestore(&card->card_lock, flags);
			if (txq_length > 0) {
				/*
				 * There is something to send
				 */
				spin_lock_irqsave(&card->card_lock, flags);
				skb = port->txq[port->txqs];
				port->txqs++;
				if (port->txqs == FST_TXQ_DEPTH) {
					port->txqs = 0;
				}
				spin_unlock_irqrestore(&card->card_lock, flags);
				/*
				 * copy the data and set the required indicators on the
				 * card.
				 */
				FST_WRW(card, txDescrRing[pi][port->txpos].bcnt,
					cnv_bcnt(skb->len));
				if ((skb->len < FST_MIN_DMA_LEN) ||
				    (card->family == FST_FAMILY_TXP)) {
					/* Enqueue the packet with normal io */
					memcpy_toio(card->mem +
						    BUF_OFFSET(txBuffer[pi]
							       [port->
								txpos][0]),
						    skb->data, skb->len);
					FST_WRB(card,
						txDescrRing[pi][port->txpos].
						bits,
						DMA_OWN | TX_STP | TX_ENP);
					dev->stats.tx_packets++;
					dev->stats.tx_bytes += skb->len;
					dev->trans_start = jiffies;
				} else {
					/* Or do it through dma */
					memcpy(card->tx_dma_handle_host,
					       skb->data, skb->len);
					card->dma_port_tx = port;
					card->dma_len_tx = skb->len;
					card->dma_txpos = port->txpos;
					fst_tx_dma(card,
						   (char *) card->
						   tx_dma_handle_card,
						   (char *)
						   BUF_OFFSET(txBuffer[pi]
							      [port->txpos][0]),
						   skb->len);
				}
				if (++port->txpos >= NUM_TX_BUFFER)
					port->txpos = 0;
				/*
				 * If we have flow control on, can we now release it?
				 */
				if (port->start) {
					if (txq_length < fst_txq_low) {
						netif_wake_queue(port_to_dev
								 (port));
						port->start = 0;
					}
				}
				dev_kfree_skb(skb);
			} else {
				/*
				 * Nothing to send so break out of the while loop
				 */
				break;
			}
		}
	}
}

Project: linux

static __be16 farsync_type_trans(struct sk_buff *skb, struct net_device *dev)
{
	skb->dev = dev;
	skb_reset_mac_header(skb);
	skb->pkt_type = PACKET_HOST;
	return htons(ETH_P_CUST);
}

Project: linux

fst_add_one(struct pci_dev *pdev, const struct pci_device_id *ent)
{
	static int no_of_cards_added = 0;
	struct fst_card_info *card;
	int err = 0;
	int i;

	printk_once(KERN_INFO
		    pr_fmt("FarSync WAN driver " FST_USER_VERSION
			   " (c) 2001-2004 FarSite Communications Ltd.\n"));
#if FST_DEBUG
	dbg(DBG_ASS, "The value of debug mask is %x\n", fst_debug_mask);
#endif
	/*
	 * We are going to be clever and allow certain cards not to be
	 * configured.  An exclude list can be provided in /etc/modules.conf
	 */
	if (fst_excluded_cards != 0) {
		/*
		 * There are cards to exclude
		 *
		 */
		for (i = 0; i < fst_excluded_cards; i++) {
			if ((pdev->devfn) >> 3 == fst_excluded_list[i]) {
				pr_info("FarSync PCI device %d not assigned\n",
					(pdev->devfn) >> 3);
				return -EBUSY;
			}
		}
	}

	/* Allocate driver private data */
	card = kzalloc(sizeof(struct fst_card_info), GFP_KERNEL);
	if (card == NULL)
		return -ENOMEM;

	/* Try to enable the device */
	if ((err = pci_enable_device(pdev)) != 0) {
		pr_err("Failed to enable card. Err %d\n", -err);
		kfree(card);
		return err;
	}

	if ((err = pci_request_regions(pdev, "FarSync")) !=0) {
		pr_err("Failed to allocate regions. Err %d\n", -err);
		pci_disable_device(pdev);
		kfree(card);
	        return err;
	}

	/* Get virtual addresses of memory regions */
	card->pci_conf = pci_resource_start(pdev, 1);
	card->phys_mem = pci_resource_start(pdev, 2);
	card->phys_ctlmem = pci_resource_start(pdev, 3);
	if ((card->mem = ioremap(card->phys_mem, FST_MEMSIZE)) == NULL) {
		pr_err("Physical memory remap failed\n");
		pci_release_regions(pdev);
		pci_disable_device(pdev);
		kfree(card);
		return -ENODEV;
	}
	if ((card->ctlmem = ioremap(card->phys_ctlmem, 0x10)) == NULL) {
		pr_err("Control memory remap failed\n");
		pci_release_regions(pdev);
		pci_disable_device(pdev);
		iounmap(card->mem);
		kfree(card);
		return -ENODEV;
	}
	dbg(DBG_PCI, "kernel mem %p, ctlmem %p\n", card->mem, card->ctlmem);

	/* Register the interrupt handler */
	if (request_irq(pdev->irq, fst_intr, IRQF_SHARED, FST_DEV_NAME, card)) {
		pr_err("Unable to register interrupt %d\n", card->irq);
		pci_release_regions(pdev);
		pci_disable_device(pdev);
		iounmap(card->ctlmem);
		iounmap(card->mem);
		kfree(card);
		return -ENODEV;
	}

	/* Record info we need */
	card->irq = pdev->irq;
	card->type = ent->driver_data;
	card->family = ((ent->driver_data == FST_TYPE_T2P) ||
			(ent->driver_data == FST_TYPE_T4P))
	    ? FST_FAMILY_TXP : FST_FAMILY_TXU;
	if ((ent->driver_data == FST_TYPE_T1U) ||
	    (ent->driver_data == FST_TYPE_TE1))
		card->nports = 1;
	else
		card->nports = ((ent->driver_data == FST_TYPE_T2P) ||
				(ent->driver_data == FST_TYPE_T2U)) ? 2 : 4;

	card->state = FST_UNINIT;
        spin_lock_init ( &card->card_lock );

        for ( i = 0 ; i < card->nports ; i++ ) {
		struct net_device *dev = alloc_hdlcdev(&card->ports[i]);
		hdlc_device *hdlc;
		if (!dev) {
			while (i--)
				free_netdev(card->ports[i].dev);
			pr_err("FarSync: out of memory\n");
                        free_irq(card->irq, card);
                        pci_release_regions(pdev);
                        pci_disable_device(pdev);
                        iounmap(card->ctlmem);
                        iounmap(card->mem);
                        kfree(card);
                        return -ENODEV;
		}
		card->ports[i].dev    = dev;
                card->ports[i].card   = card;
                card->ports[i].index  = i;
                card->ports[i].run    = 0;

		hdlc = dev_to_hdlc(dev);

                /* Fill in the net device info */
		/* Since this is a PCI setup this is purely
		 * informational. Give them the buffer addresses
		 * and basic card I/O.
		 */
                dev->mem_start   = card->phys_mem
                                 + BUF_OFFSET ( txBuffer[i][0][0]);
                dev->mem_end     = card->phys_mem
                                 + BUF_OFFSET ( txBuffer[i][NUM_TX_BUFFER][0]);
                dev->base_addr   = card->pci_conf;
                dev->irq         = card->irq;

		dev->netdev_ops = &fst_ops;
		dev->tx_queue_len = FST_TX_QUEUE_LEN;
		dev->watchdog_timeo = FST_TX_TIMEOUT;
                hdlc->attach = fst_attach;
                hdlc->xmit   = fst_start_xmit;
	}

	card->device = pdev;

	dbg(DBG_PCI, "type %d nports %d irq %d\n", card->type,
	    card->nports, card->irq);
	dbg(DBG_PCI, "conf %04x mem %08x ctlmem %08x\n",
	    card->pci_conf, card->phys_mem, card->phys_ctlmem);

	/* Reset the card's processor */
	fst_cpureset(card);
	card->state = FST_RESET;

	/* Initialise DMA (if required) */
	fst_init_dma(card);

	/* Record driver data for later use */
	pci_set_drvdata(pdev, card);

	/* Remainder of card setup */
	fst_card_array[no_of_cards_added] = card;
	card->card_no = no_of_cards_added++;	/* Record instance and bump it */
	fst_init_card(card);
	if (card->family == FST_FAMILY_TXU) {
		/*
		 * Allocate a dma buffer for transmit and receives
		 */
		card->rx_dma_handle_host =
		    pci_alloc_consistent(card->device, FST_MAX_MTU,
					 &card->rx_dma_handle_card);
		if (card->rx_dma_handle_host == NULL) {
			pr_err("Could not allocate rx dma buffer\n");
			fst_disable_intr(card);
			pci_release_regions(pdev);
			pci_disable_device(pdev);
			iounmap(card->ctlmem);
			iounmap(card->mem);
			kfree(card);
			return -ENOMEM;
		}
		card->tx_dma_handle_host =
		    pci_alloc_consistent(card->device, FST_MAX_MTU,
					 &card->tx_dma_handle_card);
		if (card->tx_dma_handle_host == NULL) {
			pr_err("Could not allocate tx dma buffer\n");
			fst_disable_intr(card);
			pci_release_regions(pdev);
			pci_disable_device(pdev);
			iounmap(card->ctlmem);
			iounmap(card->mem);
			kfree(card);
			return -ENOMEM;
		}
	}
	return 0;		/* Success */
}

Project: linux

fst_attach(struct net_device *dev, unsigned short encoding, unsigned short parity)
{
	/*
	 * Setting currently fixed in FarSync card so we check and forget
	 */
	if (encoding != ENCODING_NRZ || parity != PARITY_CRC16_PR1_CCITT)
		return -EINVAL;
	return 0;
}

Project: linux

fst_cleanup_module(void)
{
	pr_info("FarSync WAN driver unloading\n");
	pci_unregister_driver(&fst_driver);
}

Project: linux

fst_clear_intr(struct fst_card_info *card)
{
	if (card->family == FST_FAMILY_TXU) {
		(void) readb(card->ctlmem);
	} else {
		/* Poke the appropriate PLX chip register (same as enabling interrupts)
		 */
		outw(0x0543, card->pci_conf + INTCSR_9052);
	}
}

Project: linux

fst_close(struct net_device *dev)
{
	struct fst_port_info *port;
	struct fst_card_info *card;
	unsigned char tx_dma_done;
	unsigned char rx_dma_done;

	port = dev_to_port(dev);
	card = port->card;

	tx_dma_done = inb(card->pci_conf + DMACSR1);
	rx_dma_done = inb(card->pci_conf + DMACSR0);
	dbg(DBG_OPEN,
	    "Port Close: tx_dma_in_progress = %d (%x) rx_dma_in_progress = %d (%x)\n",
	    card->dmatx_in_progress, tx_dma_done, card->dmarx_in_progress,
	    rx_dma_done);

	netif_stop_queue(dev);
	fst_closeport(dev_to_port(dev));
	if (port->mode != FST_RAW) {
		hdlc_close(dev);
	}
	module_put(THIS_MODULE);
	return 0;
}

Project: linux

fst_closeport(struct fst_port_info *port)
{
	if (port->card->state == FST_RUNNING) {
		if (port->run) {
			port->run = 0;
			fst_op_lower(port, OPSTS_RTS | OPSTS_DTR);

			fst_issue_cmd(port, STOPPORT);
		} else {
			dbg(DBG_OPEN, "close: port not running\n");
		}
	}
}

Project: linux

fst_cpurelease(struct fst_card_info *card)
{
	if (card->family == FST_FAMILY_TXU) {
		/*
		 * Force posted writes to complete
		 */
		(void) readb(card->mem);

		/*
		 * Release LRESET DO = 1
		 * Then release Local Hold, DO = 1
		 */
		outw(0x040e, card->pci_conf + CNTRL_9054 + 2);
		outw(0x040f, card->pci_conf + CNTRL_9054 + 2);
	} else {
		(void) readb(card->ctlmem);
	}
}

Project: linux

fst_cpureset(struct fst_card_info *card)
{
	unsigned char interrupt_line_register;
	unsigned long j = jiffies + 1;
	unsigned int regval;

	if (card->family == FST_FAMILY_TXU) {
		if (pci_read_config_byte
		    (card->device, PCI_INTERRUPT_LINE, &interrupt_line_register)) {
			dbg(DBG_ASS,
			    "Error in reading interrupt line register\n");
		}
		/*
		 * Assert PLX software reset and Am186 hardware reset
		 * and then deassert the PLX software reset but 186 still in reset
		 */
		outw(0x440f, card->pci_conf + CNTRL_9054 + 2);
		outw(0x040f, card->pci_conf + CNTRL_9054 + 2);
		/*
		 * We are delaying here to allow the 9054 to reset itself
		 */
		j = jiffies + 1;
		while (jiffies < j)
			/* Do nothing */ ;
		outw(0x240f, card->pci_conf + CNTRL_9054 + 2);
		/*
		 * We are delaying here to allow the 9054 to reload its eeprom
		 */
		j = jiffies + 1;
		while (jiffies < j)
			/* Do nothing */ ;
		outw(0x040f, card->pci_conf + CNTRL_9054 + 2);

		if (pci_write_config_byte
		    (card->device, PCI_INTERRUPT_LINE, interrupt_line_register)) {
			dbg(DBG_ASS,
			    "Error in writing interrupt line register\n");
		}

	} else {
		regval = inl(card->pci_conf + CNTRL_9052);

		outl(regval | 0x40000000, card->pci_conf + CNTRL_9052);
		outl(regval & ~0x40000000, card->pci_conf + CNTRL_9052);
	}
}

Project: linux

fst_disable_intr(struct fst_card_info *card)
{
	if (card->family == FST_FAMILY_TXU) {
		outl(0x00000000, card->pci_conf + INTCSR_9054);
	} else {
		outw(0x0000, card->pci_conf + INTCSR_9052);
	}
}

Project: linux

fst_enable_intr(struct fst_card_info *card)
{
	if (card->family == FST_FAMILY_TXU) {
		outl(0x0f0c0900, card->pci_conf + INTCSR_9054);
	} else {
		outw(0x0543, card->pci_conf + INTCSR_9052);
	}
}

Project: linux

fst_init(void)
{
	int i;

	for (i = 0; i < FST_MAX_CARDS; i++)
		fst_card_array[i] = NULL;
	spin_lock_init(&fst_work_q_lock);
	return pci_register_driver(&fst_driver);
}

Project: linux

fst_init_card(struct fst_card_info *card)
{
	int i;
	int err;

	/* We're working on a number of ports based on the card ID. If the
	 * firmware detects something different later (should never happen)
	 * we'll have to revise it in some way then.
	 */
	for (i = 0; i < card->nports; i++) {
                err = register_hdlc_device(card->ports[i].dev);
                if (err < 0) {
			int j;
			pr_err("Cannot register HDLC device for port %d (errno %d)\n",
			       i, -err);
			for (j = i; j < card->nports; j++) {
				free_netdev(card->ports[j].dev);
				card->ports[j].dev = NULL;
			}
                        card->nports = i;
                        break;
                }
	}

	pr_info("%s-%s: %s IRQ%d, %d ports\n",
		port_to_dev(&card->ports[0])->name,
		port_to_dev(&card->ports[card->nports - 1])->name,
		type_strings[card->type], card->irq, card->nports);
}

Project: linux

fst_init_dma(struct fst_card_info *card)
{
	/*
	 * This is only required for the PLX 9054
	 */
	if (card->family == FST_FAMILY_TXU) {
	        pci_set_master(card->device);
		outl(0x00020441, card->pci_conf + DMAMODE0);
		outl(0x00020441, card->pci_conf + DMAMODE1);
		outl(0x0, card->pci_conf + DMATHR);
	}
}

Project: linux

fst_intr(int dummy, void *dev_id)
{
	struct fst_card_info *card = dev_id;
	struct fst_port_info *port;
	int rdidx;		/* Event buffer indices */
	int wridx;
	int event;		/* Actual event for processing */
	unsigned int dma_intcsr = 0;
	unsigned int do_card_interrupt;
	unsigned int int_retry_count;

	/*
	 * Check to see if the interrupt was for this card
	 * return if not
	 * Note that the call to clear the interrupt is important
	 */
	dbg(DBG_INTR, "intr: %d %p\n", card->irq, card);
	if (card->state != FST_RUNNING) {
		pr_err("Interrupt received for card %d in a non running state (%d)\n",
		       card->card_no, card->state);

		/* 
		 * It is possible to really be running, i.e. we have re-loaded
		 * a running card
		 * Clear and reprime the interrupt source 
		 */
		fst_clear_intr(card);
		return IRQ_HANDLED;
	}

	/* Clear and reprime the interrupt source */
	fst_clear_intr(card);

	/*
	 * Is the interrupt for this card (handshake == 1)
	 */
	do_card_interrupt = 0;
	if (FST_RDB(card, interruptHandshake) == 1) {
		do_card_interrupt += FST_CARD_INT;
		/* Set the software acknowledge */
		FST_WRB(card, interruptHandshake, 0xEE);
	}
	if (card->family == FST_FAMILY_TXU) {
		/*
		 * Is it a DMA Interrupt
		 */
		dma_intcsr = inl(card->pci_conf + INTCSR_9054);
		if (dma_intcsr & 0x00200000) {
			/*
			 * DMA Channel 0 (Rx transfer complete)
			 */
			dbg(DBG_RX, "DMA Rx xfer complete\n");
			outb(0x8, card->pci_conf + DMACSR0);
			fst_rx_dma_complete(card, card->dma_port_rx,
					    card->dma_len_rx, card->dma_skb_rx,
					    card->dma_rxpos);
			card->dmarx_in_progress = 0;
			do_card_interrupt += FST_RX_DMA_INT;
		}
		if (dma_intcsr & 0x00400000) {
			/*
			 * DMA Channel 1 (Tx transfer complete)
			 */
			dbg(DBG_TX, "DMA Tx xfer complete\n");
			outb(0x8, card->pci_conf + DMACSR1);
			fst_tx_dma_complete(card, card->dma_port_tx,
					    card->dma_len_tx, card->dma_txpos);
			card->dmatx_in_progress = 0;
			do_card_interrupt += FST_TX_DMA_INT;
		}
	}

	/*
	 * Have we been missing Interrupts
	 */
	int_retry_count = FST_RDL(card, interruptRetryCount);
	if (int_retry_count) {
		dbg(DBG_ASS, "Card %d int_retry_count is  %d\n",
		    card->card_no, int_retry_count);
		FST_WRL(card, interruptRetryCount, 0);
	}

	if (!do_card_interrupt) {
		return IRQ_HANDLED;
	}

	/* Scehdule the bottom half of the ISR */
	fst_q_work_item(&fst_work_intq, card->card_no);
	tasklet_schedule(&fst_int_task);

	/* Drain the event queue */
	rdidx = FST_RDB(card, interruptEvent.rdindex) & 0x1f;
	wridx = FST_RDB(card, interruptEvent.wrindex) & 0x1f;
	while (rdidx != wridx) {
		event = FST_RDB(card, interruptEvent.evntbuff[rdidx]);
		port = &card->ports[event & 0x03];

		dbg(DBG_INTR, "Processing Interrupt event: %x\n", event);

		switch (event) {
		case TE1_ALMA:
			dbg(DBG_INTR, "TE1 Alarm intr\n");
			if (port->run)
				fst_intr_te1_alarm(card, port);
			break;

		case CTLA_CHG:
		case CTLB_CHG:
		case CTLC_CHG:
		case CTLD_CHG:
			if (port->run)
				fst_intr_ctlchg(card, port);
			break;

		case ABTA_SENT:
		case ABTB_SENT:
		case ABTC_SENT:
		case ABTD_SENT:
			dbg(DBG_TX, "Abort complete port %d\n", port->index);
			break;

		case TXA_UNDF:
		case TXB_UNDF:
		case TXC_UNDF:
		case TXD_UNDF:
			/* Difficult to see how we'd get this given that we
			 * always load up the entire packet for DMA.
			 */
			dbg(DBG_TX, "Tx underflow port %d\n", port->index);
			port_to_dev(port)->stats.tx_errors++;
			port_to_dev(port)->stats.tx_fifo_errors++;
			dbg(DBG_ASS, "Tx underflow on card %d port %d\n",
			    card->card_no, port->index);
			break;

		case INIT_CPLT:
			dbg(DBG_INIT, "Card init OK intr\n");
			break;

		case INIT_FAIL:
			dbg(DBG_INIT, "Card init FAILED intr\n");
			card->state = FST_IFAILED;
			break;

		default:
			pr_err("intr: unknown card event %d. ignored\n", event);
			break;
		}

		/* Bump and wrap the index */
		if (++rdidx >= MAX_CIRBUFF)
			rdidx = 0;
	}
	FST_WRB(card, interruptEvent.rdindex, rdidx);
        return IRQ_HANDLED;
}

Project: linux

fst_intr_ctlchg(struct fst_card_info *card, struct fst_port_info *port)
{
	int signals;

	signals = FST_RDL(card, v24DebouncedSts[port->index]);

	if (signals & (((port->hwif == X21) || (port->hwif == X21D))
		       ? IPSTS_INDICATE : IPSTS_DCD)) {
		if (!netif_carrier_ok(port_to_dev(port))) {
			dbg(DBG_INTR, "DCD active\n");
			netif_carrier_on(port_to_dev(port));
		}
	} else {
		if (netif_carrier_ok(port_to_dev(port))) {
			dbg(DBG_INTR, "DCD lost\n");
			netif_carrier_off(port_to_dev(port));
		}
	}
}

Project: linux

fst_intr_rx(struct fst_card_info *card, struct fst_port_info *port)
{
	unsigned char dmabits;
	int pi;
	int rxp;
	int rx_status;
	unsigned short len;
	struct sk_buff *skb;
	struct net_device *dev = port_to_dev(port);

	/* Check we have a buffer to process */
	pi = port->index;
	rxp = port->rxpos;
	dmabits = FST_RDB(card, rxDescrRing[pi][rxp].bits);
	if (dmabits & DMA_OWN) {
		dbg(DBG_RX | DBG_INTR, "intr_rx: No buffer port %d pos %d\n",
		    pi, rxp);
		return;
	}
	if (card->dmarx_in_progress) {
		return;
	}

	/* Get buffer length */
	len = FST_RDW(card, rxDescrRing[pi][rxp].mcnt);
	/* Discard the CRC */
	len -= 2;
	if (len == 0) {
		/*
		 * This seems to happen on the TE1 interface sometimes
		 * so throw the frame away and log the event.
		 */
		pr_err("Frame received with 0 length. Card %d Port %d\n",
		       card->card_no, port->index);
		/* Return descriptor to card */
		FST_WRB(card, rxDescrRing[pi][rxp].bits, DMA_OWN);

		rxp = (rxp+1) % NUM_RX_BUFFER;
		port->rxpos = rxp;
		return;
	}

	/* Check buffer length and for other errors. We insist on one packet
	 * in one buffer. This simplifies things greatly and since we've
	 * allocated 8K it shouldn't be a real world limitation
	 */
	dbg(DBG_RX, "intr_rx: %d,%d: flags %x len %d\n", pi, rxp, dmabits, len);
	if (dmabits != (RX_STP | RX_ENP) || len > LEN_RX_BUFFER - 2) {
		fst_log_rx_error(card, port, dmabits, rxp, len);
		fst_recover_rx_error(card, port, dmabits, rxp, len);
		return;
	}

	/* Allocate SKB */
	if ((skb = dev_alloc_skb(len)) == NULL) {
		dbg(DBG_RX, "intr_rx: can't allocate buffer\n");

		dev->stats.rx_dropped++;

		/* Return descriptor to card */
		FST_WRB(card, rxDescrRing[pi][rxp].bits, DMA_OWN);

		rxp = (rxp+1) % NUM_RX_BUFFER;
		port->rxpos = rxp;
		return;
	}

	/*
	 * We know the length we need to receive, len.
	 * It's not worth using the DMA for reads of less than
	 * FST_MIN_DMA_LEN
	 */

	if ((len < FST_MIN_DMA_LEN) || (card->family == FST_FAMILY_TXP)) {
		memcpy_fromio(skb_put(skb, len),
			      card->mem + BUF_OFFSET(rxBuffer[pi][rxp][0]),
			      len);

		/* Reset buffer descriptor */
		FST_WRB(card, rxDescrRing[pi][rxp].bits, DMA_OWN);

		/* Update stats */
		dev->stats.rx_packets++;
		dev->stats.rx_bytes += len;

		/* Push upstream */
		dbg(DBG_RX, "Pushing frame up the stack\n");
		if (port->mode == FST_RAW)
			skb->protocol = farsync_type_trans(skb, dev);
		else
			skb->protocol = hdlc_type_trans(skb, dev);
		rx_status = netif_rx(skb);
		fst_process_rx_status(rx_status, port_to_dev(port)->name);
		if (rx_status == NET_RX_DROP)
			dev->stats.rx_dropped++;
	} else {
		card->dma_skb_rx = skb;
		card->dma_port_rx = port;
		card->dma_len_rx = len;
		card->dma_rxpos = rxp;
		fst_rx_dma(card, card->rx_dma_handle_card,
			   BUF_OFFSET(rxBuffer[pi][rxp][0]), len);
	}
	if (rxp != port->rxpos) {
		dbg(DBG_ASS, "About to increment rxpos by more than 1\n");
		dbg(DBG_ASS, "rxp = %d rxpos = %d\n", rxp, port->rxpos);
	}
	rxp = (rxp+1) % NUM_RX_BUFFER;
	port->rxpos = rxp;
}

Project: linux

fst_intr_te1_alarm(struct fst_card_info *card, struct fst_port_info *port)
{
	u8 los;
	u8 rra;
	u8 ais;

	los = FST_RDB(card, suStatus.lossOfSignal);
	rra = FST_RDB(card, suStatus.receiveRemoteAlarm);
	ais = FST_RDB(card, suStatus.alarmIndicationSignal);

	if (los) {
		/*
		 * Lost the link
		 */
		if (netif_carrier_ok(port_to_dev(port))) {
			dbg(DBG_INTR, "Net carrier off\n");
			netif_carrier_off(port_to_dev(port));
		}
	} else {
		/*
		 * Link available
		 */
		if (!netif_carrier_ok(port_to_dev(port))) {
			dbg(DBG_INTR, "Net carrier on\n");
			netif_carrier_on(port_to_dev(port));
		}
	}

	if (los)
		dbg(DBG_INTR, "Assert LOS Alarm\n");
	else
		dbg(DBG_INTR, "De-assert LOS Alarm\n");
	if (rra)
		dbg(DBG_INTR, "Assert RRA Alarm\n");
	else
		dbg(DBG_INTR, "De-assert RRA Alarm\n");

	if (ais)
		dbg(DBG_INTR, "Assert AIS Alarm\n");
	else
		dbg(DBG_INTR, "De-assert AIS Alarm\n");
}

Project: linux

fst_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
{
	struct fst_card_info *card;
	struct fst_port_info *port;
	struct fstioc_write wrthdr;
	struct fstioc_info info;
	unsigned long flags;
	void *buf;

	dbg(DBG_IOCTL, "ioctl: %x, %p\n", cmd, ifr->ifr_data);

	port = dev_to_port(dev);
	card = port->card;

	if (!capable(CAP_NET_ADMIN))
		return -EPERM;

	switch (cmd) {
	case FSTCPURESET:
		fst_cpureset(card);
		card->state = FST_RESET;
		return 0;

	case FSTCPURELEASE:
		fst_cpurelease(card);
		card->state = FST_STARTING;
		return 0;

	case FSTWRITE:		/* Code write (download) */

		/* First copy in the header with the length and offset of data
		 * to write
		 */
		if (ifr->ifr_data == NULL) {
			return -EINVAL;
		}
		if (copy_from_user(&wrthdr, ifr->ifr_data,
				   sizeof (struct fstioc_write))) {
			return -EFAULT;
		}

		/* Sanity check the parameters. We don't support partial writes
		 * when going over the top
		 */
		if (wrthdr.size > FST_MEMSIZE || wrthdr.offset > FST_MEMSIZE ||
		    wrthdr.size + wrthdr.offset > FST_MEMSIZE) {
			return -ENXIO;
		}

		/* Now copy the data to the card. */

		buf = memdup_user(ifr->ifr_data + sizeof(struct fstioc_write),
				  wrthdr.size);
		if (IS_ERR(buf))
			return PTR_ERR(buf);

		memcpy_toio(card->mem + wrthdr.offset, buf, wrthdr.size);
		kfree(buf);

		/* Writes to the memory of a card in the reset state constitute
		 * a download
		 */
		if (card->state == FST_RESET) {
			card->state = FST_DOWNLOAD;
		}
		return 0;

	case FSTGETCONF:

		/* If card has just been started check the shared memory config
		 * version and marker
		 */
		if (card->state == FST_STARTING) {
			check_started_ok(card);

			/* If everything checked out enable card interrupts */
			if (card->state == FST_RUNNING) {
				spin_lock_irqsave(&card->card_lock, flags);
				fst_enable_intr(card);
				FST_WRB(card, interruptHandshake, 0xEE);
				spin_unlock_irqrestore(&card->card_lock, flags);
			}
		}

		if (ifr->ifr_data == NULL) {
			return -EINVAL;
		}

		gather_conf_info(card, port, &info);

		if (copy_to_user(ifr->ifr_data, &info, sizeof (info))) {
			return -EFAULT;
		}
		return 0;

	case FSTSETCONF:

		/*
		 * Most of the settings have been moved to the generic ioctls
		 * this just covers debug and board ident now
		 */

		if (card->state != FST_RUNNING) {
			pr_err("Attempt to configure card %d in non-running state (%d)\n",
			       card->card_no, card->state);
			return -EIO;
		}
		if (copy_from_user(&info, ifr->ifr_data, sizeof (info))) {
			return -EFAULT;
		}

		return set_conf_from_info(card, port, &info);

	case SIOCWANDEV:
		switch (ifr->ifr_settings.type) {
		case IF_GET_IFACE:
			return fst_get_iface(card, port, ifr);

		case IF_IFACE_SYNC_SERIAL:
		case IF_IFACE_V35:
		case IF_IFACE_V24:
		case IF_IFACE_X21:
		case IF_IFACE_X21D:
		case IF_IFACE_T1:
		case IF_IFACE_E1:
			return fst_set_iface(card, port, ifr);

		case IF_PROTO_RAW:
			port->mode = FST_RAW;
			return 0;

		case IF_GET_PROTO:
			if (port->mode == FST_RAW) {
				ifr->ifr_settings.type = IF_PROTO_RAW;
				return 0;
			}
			return hdlc_ioctl(dev, ifr, cmd);

		default:
			port->mode = FST_GEN_HDLC;
			dbg(DBG_IOCTL, "Passing this type to hdlc %x\n",
			    ifr->ifr_settings.type);
			return hdlc_ioctl(dev, ifr, cmd);
		}

	default:
		/* Not one of ours. Pass through to HDLC package */
		return hdlc_ioctl(dev, ifr, cmd);
	}
}

Project: linux

fst_issue_cmd(struct fst_port_info *port, unsigned short cmd)
{
	struct fst_card_info *card;
	unsigned short mbval;
	unsigned long flags;
	int safety;

	card = port->card;
	spin_lock_irqsave(&card->card_lock, flags);
	mbval = FST_RDW(card, portMailbox[port->index][0]);

	safety = 0;
	/* Wait for any previous command to complete */
	while (mbval > NAK) {
		spin_unlock_irqrestore(&card->card_lock, flags);
		schedule_timeout_uninterruptible(1);
		spin_lock_irqsave(&card->card_lock, flags);

		if (++safety > 2000) {
			pr_err("Mailbox safety timeout\n");
			break;
		}

		mbval = FST_RDW(card, portMailbox[port->index][0]);
	}
	if (safety > 0) {
		dbg(DBG_CMD, "Mailbox clear after %d jiffies\n", safety);
	}
	if (mbval == NAK) {
		dbg(DBG_CMD, "issue_cmd: previous command was NAK'd\n");
	}

	FST_WRW(card, portMailbox[port->index][0], cmd);

	if (cmd == ABORTTX || cmd == STARTPORT) {
		port->txpos = 0;
		port->txipos = 0;
		port->start = 0;
	}

	spin_unlock_irqrestore(&card->card_lock, flags);
}

Project: linux

fst_log_rx_error(struct fst_card_info *card, struct fst_port_info *port,
		 unsigned char dmabits, int rxp, unsigned short len)
{
	struct net_device *dev = port_to_dev(port);

	/*
	 * Increment the appropriate error counter
	 */
	dev->stats.rx_errors++;
	if (dmabits & RX_OFLO) {
		dev->stats.rx_fifo_errors++;
		dbg(DBG_ASS, "Rx fifo error on card %d port %d buffer %d\n",
		    card->card_no, port->index, rxp);
	}
	if (dmabits & RX_CRC) {
		dev->stats.rx_crc_errors++;
		dbg(DBG_ASS, "Rx crc error on card %d port %d\n",
		    card->card_no, port->index);
	}
	if (dmabits & RX_FRAM) {
		dev->stats.rx_frame_errors++;
		dbg(DBG_ASS, "Rx frame error on card %d port %d\n",
		    card->card_no, port->index);
	}
	if (dmabits == (RX_STP | RX_ENP)) {
		dev->stats.rx_length_errors++;
		dbg(DBG_ASS, "Rx length error (%d) on card %d port %d\n",
		    len, card->card_no, port->index);
	}
}

Project: linux

fst_op_lower(struct fst_port_info *port, unsigned int outputs)
{
	outputs = ~outputs & FST_RDL(port->card, v24OpSts[port->index]);
	FST_WRL(port->card, v24OpSts[port->index], outputs);

	if (port->run)
		fst_issue_cmd(port, SETV24O);
}

Project: linux

fst_op_raise(struct fst_port_info *port, unsigned int outputs)
{
	outputs |= FST_RDL(port->card, v24OpSts[port->index]);
	FST_WRL(port->card, v24OpSts[port->index], outputs);

	if (port->run)
		fst_issue_cmd(port, SETV24O);
}

Project: linux

fst_open(struct net_device *dev)
{
	int err;
	struct fst_port_info *port;

	port = dev_to_port(dev);
	if (!try_module_get(THIS_MODULE))
          return -EBUSY;

	if (port->mode != FST_RAW) {
		err = hdlc_open(dev);
		if (err) {
			module_put(THIS_MODULE);
			return err;
		}
	}

	fst_openport(port);
	netif_wake_queue(dev);
	return 0;
}

Project: linux

fst_openport(struct fst_port_info *port)
{
	int signals;
	int txq_length;

	/* Only init things if card is actually running. This allows open to
	 * succeed for downloads etc.
	 */
	if (port->card->state == FST_RUNNING) {
		if (port->run) {
			dbg(DBG_OPEN, "open: found port already running\n");

			fst_issue_cmd(port, STOPPORT);
			port->run = 0;
		}

		fst_rx_config(port);
		fst_tx_config(port);
		fst_op_raise(port, OPSTS_RTS | OPSTS_DTR);

		fst_issue_cmd(port, STARTPORT);
		port->run = 1;

		signals = FST_RDL(port->card, v24DebouncedSts[port->index]);
		if (signals & (((port->hwif == X21) || (port->hwif == X21D))
			       ? IPSTS_INDICATE : IPSTS_DCD))
			netif_carrier_on(port_to_dev(port));
		else
			netif_carrier_off(port_to_dev(port));

		txq_length = port->txqe - port->txqs;
		port->txqe = 0;
		port->txqs = 0;
	}

}

Project: linux

fst_process_int_work_q(unsigned long /*void **/work_q)
{
	unsigned long flags;
	u64 work_intq;
	int i;

	/*
	 * Grab the queue exclusively
	 */
	dbg(DBG_INTR, "fst_process_int_work_q\n");
	spin_lock_irqsave(&fst_work_q_lock, flags);
	work_intq = fst_work_intq;
	fst_work_intq = 0;
	spin_unlock_irqrestore(&fst_work_q_lock, flags);

	/*
	 * Call the bottom half for each card with work waiting
	 */
	for (i = 0; i < FST_MAX_CARDS; i++) {
		if (work_intq & 0x01) {
			if (fst_card_array[i] != NULL) {
				dbg(DBG_INTR,
				    "Calling rx & tx bh for card %d\n", i);
				do_bottom_half_rx(fst_card_array[i]);
				do_bottom_half_tx(fst_card_array[i]);
			}
		}
		work_intq = work_intq >> 1;
	}
}

Project: linux

fst_process_rx_status(int rx_status, char *name)
{
	switch (rx_status) {
	case NET_RX_SUCCESS:
		{
			/*
			 * Nothing to do here
			 */
			break;
		}
	case NET_RX_DROP:
		{
			dbg(DBG_ASS, "%s: Received packet dropped\n", name);
			break;
		}
	}
}

Project: linux

fst_process_tx_work_q(unsigned long /*void **/work_q)
{
	unsigned long flags;
	u64 work_txq;
	int i;

	/*
	 * Grab the queue exclusively
	 */
	dbg(DBG_TX, "fst_process_tx_work_q\n");
	spin_lock_irqsave(&fst_work_q_lock, flags);
	work_txq = fst_work_txq;
	fst_work_txq = 0;
	spin_unlock_irqrestore(&fst_work_q_lock, flags);

	/*
	 * Call the bottom half for each card with work waiting
	 */
	for (i = 0; i < FST_MAX_CARDS; i++) {
		if (work_txq & 0x01) {
			if (fst_card_array[i] != NULL) {
				dbg(DBG_TX, "Calling tx bh for card %d\n", i);
				do_bottom_half_tx(fst_card_array[i]);
			}
		}
		work_txq = work_txq >> 1;
	}
}

Project: linux

fst_q_work_item(u64 * queue, int card_index)
{
	unsigned long flags;
	u64 mask;

	/*
	 * Grab the queue exclusively
	 */
	spin_lock_irqsave(&fst_work_q_lock, flags);

	/*
	 * Making an entry in the queue is simply a matter of setting
	 * a bit for the card indicating that there is work to do in the
	 * bottom half for the card.  Note the limitation of 64 cards.
	 * That ought to be enough
	 */
	mask = (u64)1 << card_index;
	*queue |= mask;
	spin_unlock_irqrestore(&fst_work_q_lock, flags);
}

Project: linux

fst_recover_rx_error(struct fst_card_info *card, struct fst_port_info *port,
		     unsigned char dmabits, int rxp, unsigned short len)
{
	int i;
	int pi;

	pi = port->index;
	/* 
	 * Discard buffer descriptors until we see the start of the
	 * next frame.  Note that for long frames this could be in
	 * a subsequent interrupt. 
	 */
	i = 0;
	while ((dmabits & (DMA_OWN | RX_STP)) == 0) {
		FST_WRB(card, rxDescrRing[pi][rxp].bits, DMA_OWN);
		rxp = (rxp+1) % NUM_RX_BUFFER;
		if (++i > NUM_RX_BUFFER) {
			dbg(DBG_ASS, "intr_rx: Discarding more bufs"
			    " than we have\n");
			break;
		}
		dmabits = FST_RDB(card, rxDescrRing[pi][rxp].bits);
		dbg(DBG_ASS, "DMA Bits of next buffer was %x\n", dmabits);
	}
	dbg(DBG_ASS, "There were %d subsequent buffers in error\n", i);

	/* Discard the terminal buffer */
	if (!(dmabits & DMA_OWN)) {
		FST_WRB(card, rxDescrRing[pi][rxp].bits, DMA_OWN);
		rxp = (rxp+1) % NUM_RX_BUFFER;
	}
	port->rxpos = rxp;
	return;

}

Project: linux

fst_remove_one(struct pci_dev *pdev)
{
	struct fst_card_info *card;
	int i;

	card = pci_get_drvdata(pdev);

	for (i = 0; i < card->nports; i++) {
		struct net_device *dev = port_to_dev(&card->ports[i]);
		unregister_hdlc_device(dev);
	}

	fst_disable_intr(card);
	free_irq(card->irq, card);

	iounmap(card->ctlmem);
	iounmap(card->mem);
	pci_release_regions(pdev);
	if (card->family == FST_FAMILY_TXU) {
		/*
		 * Free dma buffers
		 */
		pci_free_consistent(card->device, FST_MAX_MTU,
				    card->rx_dma_handle_host,
				    card->rx_dma_handle_card);
		pci_free_consistent(card->device, FST_MAX_MTU,
				    card->tx_dma_handle_host,
				    card->tx_dma_handle_card);
	}
	fst_card_array[card->card_no] = NULL;
}

Project: linux

fst_rx_config(struct fst_port_info *port)
{
	int i;
	int pi;
	unsigned int offset;
	unsigned long flags;
	struct fst_card_info *card;

	pi = port->index;
	card = port->card;
	spin_lock_irqsave(&card->card_lock, flags);
	for (i = 0; i < NUM_RX_BUFFER; i++) {
		offset = BUF_OFFSET(rxBuffer[pi][i][0]);

		FST_WRW(card, rxDescrRing[pi][i].ladr, (u16) offset);
		FST_WRB(card, rxDescrRing[pi][i].hadr, (u8) (offset >> 16));
		FST_WRW(card, rxDescrRing[pi][i].bcnt, cnv_bcnt(LEN_RX_BUFFER));
		FST_WRW(card, rxDescrRing[pi][i].mcnt, LEN_RX_BUFFER);
		FST_WRB(card, rxDescrRing[pi][i].bits, DMA_OWN);
	}
	port->rxpos = 0;
	spin_unlock_irqrestore(&card->card_lock, flags);
}

Project: linux

fst_rx_dma(struct fst_card_info *card, dma_addr_t skb,
	   dma_addr_t mem, int len)
{
	/*
	 * This routine will setup the DMA and start it
	 */

	dbg(DBG_RX, "In fst_rx_dma %lx %lx %d\n",
	    (unsigned long) skb, (unsigned long) mem, len);
	if (card->dmarx_in_progress) {
		dbg(DBG_ASS, "In fst_rx_dma while dma in progress\n");
	}

	outl(skb, card->pci_conf + DMAPADR0);	/* Copy to here */
	outl(mem, card->pci_conf + DMALADR0);	/* from here */
	outl(len, card->pci_conf + DMASIZ0);	/* for this length */
	outl(0x00000000c, card->pci_conf + DMADPR0);	/* In this direction */

	/*
	 * We use the dmarx_in_progress flag to flag the channel as busy
	 */
	card->dmarx_in_progress = 1;
	outb(0x03, card->pci_conf + DMACSR0);	/* Start the transfer */
}

Project: linux

fst_rx_dma_complete(struct fst_card_info *card, struct fst_port_info *port,
		    int len, struct sk_buff *skb, int rxp)
{
	struct net_device *dev = port_to_dev(port);
	int pi;
	int rx_status;

	dbg(DBG_TX, "fst_rx_dma_complete\n");
	pi = port->index;
	memcpy(skb_put(skb, len), card->rx_dma_handle_host, len);

	/* Reset buffer descriptor */
	FST_WRB(card, rxDescrRing[pi][rxp].bits, DMA_OWN);

	/* Update stats */
	dev->stats.rx_packets++;
	dev->stats.rx_bytes += len;

	/* Push upstream */
	dbg(DBG_RX, "Pushing the frame up the stack\n");
	if (port->mode == FST_RAW)
		skb->protocol = farsync_type_trans(skb, dev);
	else
		skb->protocol = hdlc_type_trans(skb, dev);
	rx_status = netif_rx(skb);
	fst_process_rx_status(rx_status, port_to_dev(port)->name);
	if (rx_status == NET_RX_DROP)
		dev->stats.rx_dropped++;
}

Project: linux

fst_set_iface(struct fst_card_info *card, struct fst_port_info *port,
	      struct ifreq *ifr)
{
	sync_serial_settings sync;
	int i;

	if (ifr->ifr_settings.size != sizeof (sync)) {
		return -ENOMEM;
	}

	if (copy_from_user
	    (&sync, ifr->ifr_settings.ifs_ifsu.sync, sizeof (sync))) {
		return -EFAULT;
	}

	if (sync.loopback)
		return -EINVAL;

	i = port->index;

	switch (ifr->ifr_settings.type) {
	case IF_IFACE_V35:
		FST_WRW(card, portConfig[i].lineInterface, V35);
		port->hwif = V35;
		break;

	case IF_IFACE_V24:
		FST_WRW(card, portConfig[i].lineInterface, V24);
		port->hwif = V24;
		break;

	case IF_IFACE_X21:
		FST_WRW(card, portConfig[i].lineInterface, X21);
		port->hwif = X21;
		break;

	case IF_IFACE_X21D:
		FST_WRW(card, portConfig[i].lineInterface, X21D);
		port->hwif = X21D;
		break;

	case IF_IFACE_T1:
		FST_WRW(card, portConfig[i].lineInterface, T1);
		port->hwif = T1;
		break;

	case IF_IFACE_E1:
		FST_WRW(card, portConfig[i].lineInterface, E1);
		port->hwif = E1;
		break;

	case IF_IFACE_SYNC_SERIAL:
		break;

	default:
		return -EINVAL;
	}

	switch (sync.clock_type) {
	case CLOCK_EXT:
		FST_WRB(card, portConfig[i].internalClock, EXTCLK);
		break;

	case CLOCK_INT:
		FST_WRB(card, portConfig[i].internalClock, INTCLK);
		break;

	default:
		return -EINVAL;
	}
	FST_WRL(card, portConfig[i].lineSpeed, sync.clock_rate);
	return 0;
}

Project: linux

fst_start_xmit(struct sk_buff *skb, struct net_device *dev)
{
	struct fst_card_info *card;
	struct fst_port_info *port;
	unsigned long flags;
	int txq_length;

	port = dev_to_port(dev);
	card = port->card;
	dbg(DBG_TX, "fst_start_xmit: length = %d\n", skb->len);

	/* Drop packet with error if we don't have carrier */
	if (!netif_carrier_ok(dev)) {
		dev_kfree_skb(skb);
		dev->stats.tx_errors++;
		dev->stats.tx_carrier_errors++;
		dbg(DBG_ASS,
		    "Tried to transmit but no carrier on card %d port %d\n",
		    card->card_no, port->index);
		return NETDEV_TX_OK;
	}

	/* Drop it if it's too big! MTU failure ? */
	if (skb->len > LEN_TX_BUFFER) {
		dbg(DBG_ASS, "Packet too large %d vs %d\n", skb->len,
		    LEN_TX_BUFFER);
		dev_kfree_skb(skb);
		dev->stats.tx_errors++;
		return NETDEV_TX_OK;
	}

	/*
	 * We are always going to queue the packet
	 * so that the bottom half is the only place we tx from
	 * Check there is room in the port txq
	 */
	spin_lock_irqsave(&card->card_lock, flags);
	if ((txq_length = port->txqe - port->txqs) < 0) {
		/*
		 * This is the case where the next free has wrapped but the
		 * last used hasn't
		 */
		txq_length = txq_length + FST_TXQ_DEPTH;
	}
	spin_unlock_irqrestore(&card->card_lock, flags);
	if (txq_length > fst_txq_high) {
		/*
		 * We have got enough buffers in the pipeline.  Ask the network
		 * layer to stop sending frames down
		 */
		netif_stop_queue(dev);
		port->start = 1;	/* I'm using this to signal stop sent up */
	}

	if (txq_length == FST_TXQ_DEPTH - 1) {
		/*
		 * This shouldn't have happened but such is life
		 */
		dev_kfree_skb(skb);
		dev->stats.tx_errors++;
		dbg(DBG_ASS, "Tx queue overflow card %d port %d\n",
		    card->card_no, port->index);
		return NETDEV_TX_OK;
	}

	/*
	 * queue the buffer
	 */
	spin_lock_irqsave(&card->card_lock, flags);
	port->txq[port->txqe] = skb;
	port->txqe++;
	if (port->txqe == FST_TXQ_DEPTH)
		port->txqe = 0;
	spin_unlock_irqrestore(&card->card_lock, flags);

	/* Scehdule the bottom half which now does transmit processing */
	fst_q_work_item(&fst_work_txq, card->card_no);
	tasklet_schedule(&fst_tx_task);

	return NETDEV_TX_OK;
}

Project: linux

fst_tx_config(struct fst_port_info *port)
{
	int i;
	int pi;
	unsigned int offset;
	unsigned long flags;
	struct fst_card_info *card;

	pi = port->index;
	card = port->card;
	spin_lock_irqsave(&card->card_lock, flags);
	for (i = 0; i < NUM_TX_BUFFER; i++) {
		offset = BUF_OFFSET(txBuffer[pi][i][0]);

		FST_WRW(card, txDescrRing[pi][i].ladr, (u16) offset);
		FST_WRB(card, txDescrRing[pi][i].hadr, (u8) (offset >> 16));
		FST_WRW(card, txDescrRing[pi][i].bcnt, 0);
		FST_WRB(card, txDescrRing[pi][i].bits, 0);
	}
	port->txpos = 0;
	port->txipos = 0;
	port->start = 0;
	spin_unlock_irqrestore(&card->card_lock, flags);
}

Project: linux

fst_tx_dma(struct fst_card_info *card, unsigned char *skb,
	   unsigned char *mem, int len)
{
	/*
	 * This routine will setup the DMA and start it.
	 */

	dbg(DBG_TX, "In fst_tx_dma %p %p %d\n", skb, mem, len);
	if (card->dmatx_in_progress) {
		dbg(DBG_ASS, "In fst_tx_dma while dma in progress\n");
	}

	outl((unsigned long) skb, card->pci_conf + DMAPADR1);	/* Copy from here */
	outl((unsigned long) mem, card->pci_conf + DMALADR1);	/* to here */
	outl(len, card->pci_conf + DMASIZ1);	/* for this length */
	outl(0x000000004, card->pci_conf + DMADPR1);	/* In this direction */

	/*
	 * We use the dmatx_in_progress to flag the channel as busy
	 */
	card->dmatx_in_progress = 1;
	outb(0x03, card->pci_conf + DMACSR1);	/* Start the transfer */
}

Project: linux

fst_tx_timeout(struct net_device *dev)
{
	struct fst_port_info *port;
	struct fst_card_info *card;

	port = dev_to_port(dev);
	card = port->card;
	dev->stats.tx_errors++;
	dev->stats.tx_aborted_errors++;
	dbg(DBG_ASS, "Tx timeout card %d port %d\n",
	    card->card_no, port->index);
	fst_issue_cmd(port, ABORTTX);

	dev->trans_start = jiffies;
	netif_wake_queue(dev);
	port->start = 0;
}

Project: linux

gather_conf_info(struct fst_card_info *card, struct fst_port_info *port,
		 struct fstioc_info *info)
{
	int i;

	memset(info, 0, sizeof (struct fstioc_info));

	i = port->index;
	info->kernelVersion = LINUX_VERSION_CODE;
	info->nports = card->nports;
	info->type = card->type;
	info->state = card->state;
	info->proto = FST_GEN_HDLC;
	info->index = i;
#if FST_DEBUG
	info->debug = fst_debug_mask;
#endif

	/* Only mark information as valid if card is running.
	 * Copy the data anyway in case it is useful for diagnostics
	 */
	info->valid = ((card->state == FST_RUNNING) ? FSTVAL_ALL : FSTVAL_CARD)
#if FST_DEBUG
	    | FSTVAL_DEBUG
#endif
	    ;

	info->lineInterface = FST_RDW(card, portConfig[i].lineInterface);
	info->internalClock = FST_RDB(card, portConfig[i].internalClock);
	info->lineSpeed = FST_RDL(card, portConfig[i].lineSpeed);
	info->invertClock = FST_RDB(card, portConfig[i].invertClock);
	info->v24IpSts = FST_RDL(card, v24IpSts[i]);
	info->v24OpSts = FST_RDL(card, v24OpSts[i]);
	info->clockStatus = FST_RDW(card, clockStatus[i]);
	info->cableStatus = FST_RDW(card, cableStatus);
	info->cardMode = FST_RDW(card, cardMode);
	info->smcFirmwareVersion = FST_RDL(card, smcFirmwareVersion);

	/*
	 * The T2U can report cable presence for both A or B
	 * in bits 0 and 1 of cableStatus.  See which port we are and 
	 * do the mapping.
	 */
	if (card->family == FST_FAMILY_TXU) {
		if (port->index == 0) {
			/*
			 * Port A
			 */
			info->cableStatus = info->cableStatus & 1;
		} else {
			/*
			 * Port B
			 */
			info->cableStatus = info->cableStatus >> 1;
			info->cableStatus = info->cableStatus & 1;
		}
	}
	/*
	 * Some additional bits if we are TE1
	 */
	if (card->type == FST_TYPE_TE1) {
		info->lineSpeed = FST_RDL(card, suConfig.dataRate);
		info->clockSource = FST_RDB(card, suConfig.clocking);
		info->framing = FST_RDB(card, suConfig.framing);
		info->structure = FST_RDB(card, suConfig.structure);
		info->interface = FST_RDB(card, suConfig.interface);
		info->coding = FST_RDB(card, suConfig.coding);
		info->lineBuildOut = FST_RDB(card, suConfig.lineBuildOut);
		info->equalizer = FST_RDB(card, suConfig.equalizer);
		info->loopMode = FST_RDB(card, suConfig.loopMode);
		info->range = FST_RDB(card, suConfig.range);
		info->txBufferMode = FST_RDB(card, suConfig.txBufferMode);
		info->rxBufferMode = FST_RDB(card, suConfig.rxBufferMode);
		info->startingSlot = FST_RDB(card, suConfig.startingSlot);
		info->losThreshold = FST_RDB(card, suConfig.losThreshold);
		if (FST_RDB(card, suConfig.enableIdleCode))
			info->idleCode = FST_RDB(card, suConfig.idleCode);
		else
			info->idleCode = 0;
		info->receiveBufferDelay =
		    FST_RDL(card, suStatus.receiveBufferDelay);
		info->framingErrorCount =
		    FST_RDL(card, suStatus.framingErrorCount);
		info->codeViolationCount =
		    FST_RDL(card, suStatus.codeViolationCount);
		info->crcErrorCount = FST_RDL(card, suStatus.crcErrorCount);
		info->lineAttenuation = FST_RDL(card, suStatus.lineAttenuation);
		info->lossOfSignal = FST_RDB(card, suStatus.lossOfSignal);
		info->receiveRemoteAlarm =
		    FST_RDB(card, suStatus.receiveRemoteAlarm);
		info->alarmIndicationSignal =
		    FST_RDB(card, suStatus.alarmIndicationSignal);
	}
}

Project: linux

set_conf_from_info(struct fst_card_info *card, struct fst_port_info *port,
		   struct fstioc_info *info)
{
	int err;
	unsigned char my_framing;

	/* Set things according to the user set valid flags 
	 * Several of the old options have been invalidated/replaced by the 
	 * generic hdlc package.
	 */
	err = 0;
	if (info->valid & FSTVAL_PROTO) {
		if (info->proto == FST_RAW)
			port->mode = FST_RAW;
		else
			port->mode = FST_GEN_HDLC;
	}

	if (info->valid & FSTVAL_CABLE)
		err = -EINVAL;

	if (info->valid & FSTVAL_SPEED)
		err = -EINVAL;

	if (info->valid & FSTVAL_PHASE)
		FST_WRB(card, portConfig[port->index].invertClock,
			info->invertClock);
	if (info->valid & FSTVAL_MODE)
		FST_WRW(card, cardMode, info->cardMode);
	if (info->valid & FSTVAL_TE1) {
		FST_WRL(card, suConfig.dataRate, info->lineSpeed);
		FST_WRB(card, suConfig.clocking, info->clockSource);
		my_framing = FRAMING_E1;
		if (info->framing == E1)
			my_framing = FRAMING_E1;
		if (info->framing == T1)
			my_framing = FRAMING_T1;
		if (info->framing == J1)
			my_framing = FRAMING_J1;
		FST_WRB(card, suConfig.framing, my_framing);
		FST_WRB(card, suConfig.structure, info->structure);
		FST_WRB(card, suConfig.interface, info->interface);
		FST_WRB(card, suConfig.coding, info->coding);
		FST_WRB(card, suConfig.lineBuildOut, info->lineBuildOut);
		FST_WRB(card, suConfig.equalizer, info->equalizer);
		FST_WRB(card, suConfig.transparentMode, info->transparentMode);
		FST_WRB(card, suConfig.loopMode, info->loopMode);
		FST_WRB(card, suConfig.range, info->range);
		FST_WRB(card, suConfig.txBufferMode, info->txBufferMode);
		FST_WRB(card, suConfig.rxBufferMode, info->rxBufferMode);
		FST_WRB(card, suConfig.startingSlot, info->startingSlot);
		FST_WRB(card, suConfig.losThreshold, info->losThreshold);
		if (info->idleCode)
			FST_WRB(card, suConfig.enableIdleCode, 1);
		else
			FST_WRB(card, suConfig.enableIdleCode, 0);
		FST_WRB(card, suConfig.idleCode, info->idleCode);
#if FST_DEBUG
		if (info->valid & FSTVAL_TE1) {
			printk("Setting TE1 data\n");
			printk("Line Speed = %d\n", info->lineSpeed);
			printk("Start slot = %d\n", info->startingSlot);
			printk("Clock source = %d\n", info->clockSource);
			printk("Framing = %d\n", my_framing);
			printk("Structure = %d\n", info->structure);
			printk("interface = %d\n", info->interface);
			printk("Coding = %d\n", info->coding);
			printk("Line build out = %d\n", info->lineBuildOut);
			printk("Equaliser = %d\n", info->equalizer);
			printk("Transparent mode = %d\n",
			       info->transparentMode);
			printk("Loop mode = %d\n", info->loopMode);
			printk("Range = %d\n", info->range);
			printk("Tx Buffer mode = %d\n", info->txBufferMode);
			printk("Rx Buffer mode = %d\n", info->rxBufferMode);
			printk("LOS Threshold = %d\n", info->losThreshold);
			printk("Idle Code = %d\n", info->idleCode);
		}
#endif
	}
#if FST_DEBUG
	if (info->valid & FSTVAL_DEBUG) {
		fst_debug_mask = info->debug;
	}
#endif

	return err;
}