/**
* ks8695_link_irq - Link change IRQ handler
* @irq: The IRQ which went off (ignored)
* @dev_id: The net_device for the interrupt
*
* The WAN interface can generate an IRQ when the link changes,
* report this to the net layer and the user.
*/
static irqreturn_t
ks8695_link_irq(int irq, void *dev_id)
{
struct net_device *ndev = (struct net_device *)dev_id;
struct ks8695_priv *ksp = netdev_priv(ndev);
u32 ctrl;
ctrl = readl(ksp->phyiface_regs + KS8695_WMC);
if (ctrl & WMC_WLS) {
netif_carrier_on(ndev);
if (netif_msg_link(ksp))
dev_info(ksp->dev,
"%s: Link is now up (10%sMbps/%s-duplex)\n",
ndev->name,
(ctrl & WMC_WSS) ? "0" : "",
(ctrl & WMC_WDS) ? "Full" : "Half");
} else {
netif_carrier_off(ndev);
if (netif_msg_link(ksp))
dev_info(ksp->dev, "%s: Link is now down.\n",
ndev->name);
}
return IRQ_HANDLED;
}
static int atl1c_set_settings(struct net_device *netdev,
struct ethtool_cmd *ecmd)
{
struct atl1c_adapter *adapter = netdev_priv(netdev);
struct atl1c_hw *hw = &adapter->hw;
u16 autoneg_advertised;
while (test_and_set_bit(__AT_RESETTING, &adapter->flags))
msleep(1);
if (ecmd->autoneg == AUTONEG_ENABLE) {
autoneg_advertised = ADVERTISED_Autoneg;
} else {
u32 speed = ethtool_cmd_speed(ecmd);
if (speed == SPEED_1000) {
if (ecmd->duplex != DUPLEX_FULL) {
if (netif_msg_link(adapter))
dev_warn(&adapter->pdev->dev,
"1000M half is invalid\n");
clear_bit(__AT_RESETTING, &adapter->flags);
return -EINVAL;
}
autoneg_advertised = ADVERTISED_1000baseT_Full;
} else if (speed == SPEED_100) {
if (ecmd->duplex == DUPLEX_FULL)
autoneg_advertised = ADVERTISED_100baseT_Full;
else
autoneg_advertised = ADVERTISED_100baseT_Half;
} else {
if (ecmd->duplex == DUPLEX_FULL)
autoneg_advertised = ADVERTISED_10baseT_Full;
else
autoneg_advertised = ADVERTISED_10baseT_Half;
}
}
if (hw->autoneg_advertised != autoneg_advertised) {
hw->autoneg_advertised = autoneg_advertised;
if (atl1c_restart_autoneg(hw) != 0) {
if (netif_msg_link(adapter))
dev_warn(&adapter->pdev->dev,
"ethtool speed/duplex setting failed\n");
clear_bit(__AT_RESETTING, &adapter->flags);
return -EINVAL;
}
}
clear_bit(__AT_RESETTING, &adapter->flags);
return 0;
}
/*-----------------------------------------------------------------------------
* generic link-change handler - should be sufficient for most cases
*-----------------------------------------------------------------------------*/
static void generic_adjust_link(struct net_device *dev)
{
struct fs_enet_private *fep = netdev_priv(dev);
struct phy_device *phydev = fep->phydev;
int new_state = 0;
if (phydev->link) {
/* adjust to duplex mode */
if (phydev->duplex != fep->oldduplex) {
new_state = 1;
fep->oldduplex = phydev->duplex;
}
if (phydev->speed != fep->oldspeed) {
new_state = 1;
fep->oldspeed = phydev->speed;
}
if (!fep->oldlink) {
new_state = 1;
fep->oldlink = 1;
}
if (new_state)
fep->ops->restart(dev);
} else if (fep->oldlink) {
new_state = 1;
fep->oldlink = 0;
fep->oldspeed = 0;
fep->oldduplex = -1;
}
if (new_state && netif_msg_link(fep))
phy_print_status(phydev);
}
static int netx_eth_open(struct net_device *ndev)
{
struct netx_eth_priv *priv = netdev_priv(ndev);
if (request_irq
(ndev->irq, netx_eth_interrupt, IRQF_SHARED, ndev->name, ndev))
return -EAGAIN;
writel(ndev->dev_addr[0] |
ndev->dev_addr[1]<<8 |
ndev->dev_addr[2]<<16 |
ndev->dev_addr[3]<<24,
priv->xpec_base + NETX_XPEC_RAM_START_OFS + ETH_MAC_4321);
writel(ndev->dev_addr[4] |
ndev->dev_addr[5]<<8,
priv->xpec_base + NETX_XPEC_RAM_START_OFS + ETH_MAC_65);
writel(LOCAL_CONFIG_LINK_STATUS_IRQ_EN |
LOCAL_CONFIG_CON_LO_IRQ_EN |
LOCAL_CONFIG_CON_HI_IRQ_EN |
LOCAL_CONFIG_IND_LO_IRQ_EN |
LOCAL_CONFIG_IND_HI_IRQ_EN,
priv->xpec_base + NETX_XPEC_RAM_START_OFS +
ETH_MAC_LOCAL_CONFIG);
mii_check_media(&priv->mii, netif_msg_link(priv), 1);
netif_start_queue(ndev);
return 0;
}
static irqreturn_t
netx_eth_interrupt(int irq, void *dev_id)
{
struct net_device *ndev = dev_id;
struct netx_eth_priv *priv = netdev_priv(ndev);
int status;
unsigned long flags;
spin_lock_irqsave(&priv->lock, flags);
status = readl(NETX_PFIFO_XPEC_ISR(priv->id));
while (status) {
int fill_level;
writel(status, NETX_PFIFO_XPEC_ISR(priv->id));
if ((status & ISR_CON_HI) || (status & ISR_IND_HI))
printk("%s: unexpected status: 0x%08x\n",
__func__, status);
fill_level =
readl(NETX_PFIFO_FILL_LEVEL(IND_FIFO_PORT_LO(priv->id)));
while (fill_level--)
netx_eth_receive(ndev);
if (status & ISR_CON_LO)
netif_wake_queue(ndev);
if (status & ISR_LINK_STATUS_CHANGE)
mii_check_media(&priv->mii, netif_msg_link(priv), 1);
status = readl(NETX_PFIFO_XPEC_ISR(priv->id));
}
spin_unlock_irqrestore(&priv->lock, flags);
return IRQ_HANDLED;
}
static int cp_open (struct net_device *dev)
{
struct cp_private *cp = netdev_priv(dev);
int rc;
if (netif_msg_ifup(cp))
printk(KERN_DEBUG "%s: enabling interface\n", dev->name);
rc = cp_alloc_rings(cp);
if (rc)
return rc;
cp_init_hw(cp);
rc = request_irq(dev->irq, cp_interrupt, SA_SHIRQ, dev->name, dev);
if (rc)
goto err_out_hw;
netif_carrier_off(dev);
mii_check_media(&cp->mii_if, netif_msg_link(cp), TRUE);
netif_start_queue(dev);
return 0;
err_out_hw:
cp_stop_hw(cp);
cp_free_rings(cp);
return rc;
}
static inline void nc_dump_ttl(struct usbnet *dev, u16 ttl)
{
if (netif_msg_link(dev))
devdbg(dev, "net1080 %s-%s ttl 0x%x this = %d, other = %d",
dev->udev->bus->bus_name, dev->udev->devpath,
ttl, TTL_THIS(ttl), TTL_OTHER(ttl));
}
static inline void nc_dump_status(struct usbnet *dev, u16 status)
{
if (!netif_msg_link(dev))
return;
devdbg(dev, "net1080 %s-%s status 0x%x:"
" this (%c) PKT=%d%s%s%s;"
" other PKT=%d%s%s%s; unspec 0x%x",
dev->udev->bus->bus_name, dev->udev->devpath,
status,
// XXX the packet counts don't seem right
// (1 at reset, not 0); maybe UNSPEC too
(status & STATUS_PORT_A) ? 'A' : 'B',
STATUS_PACKETS_THIS(status),
(status & STATUS_CONN_THIS) ? " CON" : "",
(status & STATUS_SUSPEND_THIS) ? " SUS" : "",
(status & STATUS_MAILBOX_THIS) ? " MBOX" : "",
STATUS_PACKETS_OTHER(status),
(status & STATUS_CONN_OTHER) ? " CON" : "",
(status & STATUS_SUSPEND_OTHER) ? " SUS" : "",
(status & STATUS_MAILBOX_OTHER) ? " MBOX" : "",
status & STATUS_UNSPEC_MASK
);
}
static void usbnet_bh (unsigned long param)
{
struct usbnet *dev = (struct usbnet *) param;
struct sk_buff *skb;
struct skb_data *entry;
while ((skb = skb_dequeue (&dev->done))) {
entry = (struct skb_data *) skb->cb;
switch (entry->state) {
case rx_done:
entry->state = rx_cleanup;
rx_process (dev, skb);
continue;
case tx_done:
case rx_cleanup:
usb_free_urb (entry->urb);
dev_kfree_skb (skb);
continue;
default:
devdbg (dev, "bogus skb state %d", entry->state);
}
}
// waiting for all pending urbs to complete?
if (dev->wait) {
if ((dev->txq.qlen + dev->rxq.qlen + dev->done.qlen) == 0) {
wake_up (dev->wait);
}
// or are we maybe short a few urbs?
} else if (netif_running (dev->net)
&& netif_device_present (dev->net)
&& !timer_pending (&dev->delay)
&& !test_bit (EVENT_RX_HALT, &dev->flags)) {
int temp = dev->rxq.qlen;
int qlen = RX_QLEN (dev);
if (temp < qlen) {
struct urb *urb;
int i;
// don't refill the queue all at once
for (i = 0; i < 10 && dev->rxq.qlen < qlen; i++) {
urb = usb_alloc_urb (0, GFP_ATOMIC);
if (urb != NULL)
rx_submit (dev, urb, GFP_ATOMIC);
}
if (temp != dev->rxq.qlen && netif_msg_link (dev))
devdbg (dev, "rxqlen %d --> %d",
temp, dev->rxq.qlen);
if (dev->rxq.qlen < qlen)
tasklet_schedule (&dev->bh);
}
if (dev->txq.qlen < TX_QLEN (dev))
netif_wake_queue (dev->net);
}
}
static irqreturn_t
cp_interrupt (int irq, void *dev_instance, struct pt_regs *regs)
{
struct net_device *dev = dev_instance;
struct cp_private *cp;
u16 status;
if (unlikely(dev == NULL))
return IRQ_NONE;
cp = netdev_priv(dev);
status = cpr16(IntrStatus);
if (!status || (status == 0xFFFF))
return IRQ_NONE;
if (netif_msg_intr(cp))
printk(KERN_DEBUG "%s: intr, status %04x cmd %02x cpcmd %04x\n",
dev->name, status, cpr8(Cmd), cpr16(CpCmd));
cpw16(IntrStatus, status & ~cp_rx_intr_mask);
spin_lock(&cp->lock);
/* close possible race's with dev_close */
if (unlikely(!netif_running(dev))) {
cpw16(IntrMask, 0);
spin_unlock(&cp->lock);
return IRQ_HANDLED;
}
if (status & (RxOK | RxErr | RxEmpty | RxFIFOOvr))
if (netif_rx_schedule_prep(dev)) {
cpw16_f(IntrMask, cp_norx_intr_mask);
__netif_rx_schedule(dev);
}
if (status & (TxOK | TxErr | TxEmpty | SWInt))
cp_tx(cp);
if (status & LinkChg)
mii_check_media(&cp->mii_if, netif_msg_link(cp), FALSE);
spin_unlock(&cp->lock);
if (status & PciErr) {
u16 pci_status;
pci_read_config_word(cp->pdev, PCI_STATUS, &pci_status);
pci_write_config_word(cp->pdev, PCI_STATUS, pci_status);
printk(KERN_ERR "%s: PCI bus error, status=%04x, PCI status=%04x\n",
dev->name, status, pci_status);
/* TODO: reset hardware */
}
return IRQ_HANDLED;
}
static void tx_complete (struct urb *urb)
{
struct sk_buff *skb = (struct sk_buff *) urb->context;
struct skb_data *entry = (struct skb_data *) skb->cb;
struct usbnet *dev = entry->dev;
if (urb->status == 0) {
dev->net->stats.tx_packets++;
dev->net->stats.tx_bytes += entry->length;
} else {
dev->net->stats.tx_errors++;
switch (urb->status) {
case -EPIPE:
usbnet_defer_kevent (dev, EVENT_TX_HALT);
break;
/* software-driven interface shutdown */
case -ECONNRESET: // async unlink
case -ESHUTDOWN: // hardware gone
break;
// like rx, tx gets controller i/o faults during khubd delays
// and so it uses the same throttling mechanism.
case -EPROTO:
case -ETIME:
case -EILSEQ:
#if defined(CONFIG_ERICSSON_F3307_ENABLE)
usb_mark_last_busy(dev->udev);
#endif
if (!timer_pending (&dev->delay)) {
mod_timer (&dev->delay,
jiffies + THROTTLE_JIFFIES);
if (netif_msg_link (dev))
devdbg (dev, "tx throttle %d",
urb->status);
}
netif_stop_queue (dev->net);
break;
default:
if (netif_msg_tx_err (dev))
devdbg (dev, "tx err %d", entry->urb->status);
break;
}
}
#if defined(CONFIG_ERICSSON_F3307_ENABLE)
usb_autopm_put_interface_async(dev->intf);
#endif
urb->dev = NULL;
entry->state = tx_done;
defer_bh(dev, skb, &dev->txq);
}
static int net1080_reset(struct usbnet *dev)
{
u16 usbctl, status, ttl;
u16 *vp = kmalloc(sizeof (u16), GFP_KERNEL);
int retval;
if (!vp)
return -ENOMEM;
// nc_dump_registers(dev);
if ((retval = nc_register_read(dev, REG_STATUS, vp)) < 0) {
dbg("can't read %s-%s status: %d",
dev->udev->bus->bus_name, dev->udev->devpath, retval);
goto done;
}
status = *vp;
nc_dump_status(dev, status);
if ((retval = nc_register_read(dev, REG_USBCTL, vp)) < 0) {
dbg("can't read USBCTL, %d", retval);
goto done;
}
usbctl = *vp;
nc_dump_usbctl(dev, usbctl);
nc_register_write(dev, REG_USBCTL,
USBCTL_FLUSH_THIS | USBCTL_FLUSH_OTHER);
if ((retval = nc_register_read(dev, REG_TTL, vp)) < 0) {
dbg("can't read TTL, %d", retval);
goto done;
}
ttl = *vp;
// nc_dump_ttl(dev, ttl);
nc_register_write(dev, REG_TTL,
MK_TTL(NC_READ_TTL_MS, TTL_OTHER(ttl)) );
dbg("%s: assigned TTL, %d ms", dev->net->name, NC_READ_TTL_MS);
if (netif_msg_link(dev))
devinfo(dev, "port %c, peer %sconnected",
(status & STATUS_PORT_A) ? 'A' : 'B',
(status & STATUS_CONN_OTHER) ? "" : "dis"
);
retval = 0;
done:
kfree(vp);
return retval;
}
/* Start or stop link monitoring. If we want to be interrupted for a link
state change, then we call this routine just once when turning on
interrupt monitoring. For polling, this routine is called periodically
every HX_LINK_TIMEOUT seconds and the one-shot timer is set for the next
period. */
static int hxge_link_monitor(struct hxge_adapter *hxgep, int cmd)
{
if (netif_msg_link(hxgep)) {
HXGE_DBG(hxgep, "hxge_link_monitor: cmd = %d",cmd);
if (hxgep->link_monitor_state == LINK_MONITOR_DISABLED) {
HXGE_DBG(hxgep, "hxge_link_monitor: Link monitoring disabled");
}
else {
HXGE_DBG(hxgep, "hxge_link_monitor: Link monitoring enabled");
}
}
hxgep->statsp->link_monitor_cnt++;
switch (cmd) {
case LINK_MONITOR_START:
/* Assert an interrupt when link state changes. */
if (hxgep->link_mode == LINK_MODE_INTR) {
if (hxge_link_intr(hxgep, cmd))
goto fail;
/* Periodically poll for for state change */
} else if (hxgep->link_monitor_state == LINK_MONITOR_DISABLED) {
hxgep->link_monitor_state = LINK_MONITOR_ENABLED;
mod_timer (&hxgep->wd_timer, jiffies + HXGE_LINK_TIMEOUT);
}
HXGE_DBG(hxgep, "hxge_link_monitor: Link monitoring started");
break;
case LINK_MONITOR_STOP:
if (hxgep->link_mode == LINK_MODE_INTR) {
if (hxge_link_intr(hxgep, cmd))
goto fail;
} else if (hxgep->link_monitor_state == LINK_MONITOR_ENABLED)
{
hxgep->link_monitor_state = LINK_MONITOR_DISABLED;
del_timer_sync(&hxgep->wd_timer);
}
HXGE_DBG(hxgep, "hxge_link_monitor: Link monitoring stopped");
break;
default:
HXGE_ERR(hxgep, "hxge_link_monitor: Unknown command");
break;
}
return 0;
fail:
HXGE_ERR(hxgep, "hxge_link_monitor: failed");
return -1;
}
static void smc_phy_check_media(struct net_device *dev, int init)
{
struct smc_local *lp = netdev_priv(dev);
void __iomem *ioaddr = lp->base;
if (mii_check_media(&lp->mii, netif_msg_link(lp), init)) {
if (lp->mii.full_duplex) {
lp->tcr_cur_mode |= TCR_SWFDUP;
} else {
lp->tcr_cur_mode &= ~TCR_SWFDUP;
}
SMC_SELECT_BANK(lp, 0);
SMC_SET_TCR(lp, lp->tcr_cur_mode);
}
}
static inline void nc_dump_usbctl(struct usbnet *dev, u16 usbctl)
{
if (!netif_msg_link(dev))
return;
devdbg(dev, "net1080 %s-%s usbctl 0x%x:%s%s%s%s%s;"
" this%s%s;"
" other%s%s; r/o 0x%x",
dev->udev->bus->bus_name, dev->udev->devpath,
usbctl,
(usbctl & USBCTL_ENABLE_LANG) ? " lang" : "",
(usbctl & USBCTL_ENABLE_MFGR) ? " mfgr" : "",
(usbctl & USBCTL_ENABLE_PROD) ? " prod" : "",
(usbctl & USBCTL_ENABLE_SERIAL) ? " serial" : "",
(usbctl & USBCTL_ENABLE_DEFAULTS) ? " defaults" : "",
(usbctl & USBCTL_FLUSH_OTHER) ? " FLUSH" : "",
(usbctl & USBCTL_DISCONN_OTHER) ? " DIS" : "",
(usbctl & USBCTL_FLUSH_THIS) ? " FLUSH" : "",
(usbctl & USBCTL_DISCONN_THIS) ? " DIS" : "",
usbctl & ~USBCTL_WRITABLE_MASK
);
}
static void xgbe_phy_adjust_link(struct xgbe_prv_data *pdata)
{
int new_state = 0;
if (pdata->phy.link) {
/* Flow control support */
pdata->pause_autoneg = pdata->phy.pause_autoneg;
if (pdata->tx_pause != pdata->phy.tx_pause) {
new_state = 1;
pdata->hw_if.config_tx_flow_control(pdata);
pdata->tx_pause = pdata->phy.tx_pause;
}
if (pdata->rx_pause != pdata->phy.rx_pause) {
new_state = 1;
pdata->hw_if.config_rx_flow_control(pdata);
pdata->rx_pause = pdata->phy.rx_pause;
}
/* Speed support */
if (pdata->phy_speed != pdata->phy.speed) {
new_state = 1;
pdata->phy_speed = pdata->phy.speed;
}
if (pdata->phy_link != pdata->phy.link) {
new_state = 1;
pdata->phy_link = pdata->phy.link;
}
} else if (pdata->phy_link) {
new_state = 1;
pdata->phy_link = 0;
pdata->phy_speed = SPEED_UNKNOWN;
}
if (new_state && netif_msg_link(pdata))
xgbe_phy_print_status(pdata);
}
static INT bcm_open(struct net_device *dev)
{
struct bcm_mini_adapter *Adapter = GET_BCM_ADAPTER(dev);
if (Adapter->fw_download_done == false) {
pr_notice(PFX "%s: link up failed (download in progress)\n",
dev->name);
return -EBUSY;
}
if (netif_msg_ifup(Adapter))
pr_info(PFX "%s: enabling interface\n", dev->name);
if (Adapter->LinkUpStatus) {
if (netif_msg_link(Adapter))
pr_info(PFX "%s: link up\n", dev->name);
netif_carrier_on(Adapter->dev);
netif_start_queue(Adapter->dev);
}
return 0;
}
static void smc_10bt_check_media(struct net_device *dev, int init)
{
struct smc_local *lp = netdev_priv(dev);
void __iomem *ioaddr = lp->base;
unsigned int old_carrier, new_carrier;
old_carrier = netif_carrier_ok(dev) ? 1 : 0;
SMC_SELECT_BANK(lp, 0);
new_carrier = (SMC_GET_EPH_STATUS(lp) & ES_LINK_OK) ? 1 : 0;
SMC_SELECT_BANK(lp, 2);
if (init || (old_carrier != new_carrier)) {
if (!new_carrier) {
netif_carrier_off(dev);
} else {
netif_carrier_on(dev);
}
if (netif_msg_link(lp))
printk(KERN_INFO "%s: link %s\n", dev->name,
new_carrier ? "up" : "down");
}
}
/* PHY state control function */
static void sh_eth_adjust_link(struct net_device *ndev)
{
struct sh_eth_private *mdp = netdev_priv(ndev);
struct phy_device *phydev = mdp->phydev;
int new_state = 0;
if (phydev->link != PHY_DOWN) {
if (phydev->duplex != mdp->duplex) {
new_state = 1;
mdp->duplex = phydev->duplex;
if (mdp->cd->set_duplex)
mdp->cd->set_duplex(ndev);
}
if (phydev->speed != mdp->speed) {
new_state = 1;
mdp->speed = phydev->speed;
if (mdp->cd->set_rate)
mdp->cd->set_rate(ndev);
}
if (mdp->link == PHY_DOWN) {
sh_eth_write(ndev,
(sh_eth_read(ndev, ECMR) & ~ECMR_TXF), ECMR);
new_state = 1;
mdp->link = phydev->link;
}
} else if (mdp->link) {
new_state = 1;
mdp->link = PHY_DOWN;
mdp->speed = 0;
mdp->duplex = -1;
}
if (new_state && netif_msg_link(mdp))
phy_print_status(phydev);
}
static int mpodp_clean_tx_unlocked(struct mpodp_if_priv *priv,
struct mpodp_txq *txq, unsigned budget)
{
struct net_device *netdev = priv->netdev;
struct mpodp_tx *tx;
unsigned int packets_completed = 0;
unsigned int bytes_completed = 0;
unsigned int worked = 0;
union mppa_timestamp ts;
uint32_t tx_done, first_tx_done, last_tx_done, tx_submitted,
tx_size, tx_head;
tx_submitted = atomic_read(&txq->submitted);
tx_done = atomic_read(&txq->done);
first_tx_done = tx_done;
last_tx_done = first_tx_done;
tx_size = txq->size;
tx_head = atomic_read(&txq->head);
if (!tx_head) {
/* No carrier yet. Check if there are any buffers yet */
tx_head = readl(txq->head_addr);
if (tx_head) {
/* We now have buffers */
atomic_set(&txq->head, tx_head);
if (netif_msg_link(priv))
netdev_info(netdev,"txq[%d] now has Tx (%u).\n",
txq->id, tx_head);
}
return 0;
}
/* TX: 2nd step: update TX tail (DMA transfer completed) */
while (tx_done != tx_submitted && worked < budget) {
if (!mpodp_tx_is_done(priv, txq, tx_done)) {
/* DMA transfer not completed */
break;
}
if (netif_msg_tx_done(priv))
netdev_info(netdev,
"txq[%d] tx[%d]: transfer done (head: %d submitted: %d done: %d)\n",
txq->id, tx_done, atomic_read(&txq->head),
tx_submitted, tx_done);
/* get TX slot */
tx = &(txq->ring[tx_done]);
/* free ressources */
unmap_skb(&priv->pdev->dev, tx->skb, tx);
consume_skb(tx->skb);
worked++;
tx_done += 1;
if (tx_done == tx_size)
tx_done = 0;
last_tx_done = tx_done;
}
/* write new TX tail */
atomic_set(&txq->done, tx_done);
/* TX: 3rd step: free finished TX slot */
while (first_tx_done != last_tx_done) {
if (netif_msg_tx_done(priv))
netdev_info(netdev,
"txq[%d] tx[%d]: done (head: %d submitted: %d done: %d)\n",
txq->id, first_tx_done, atomic_read(&txq->head),
tx_submitted, tx_done);
/* get TX slot */
tx = &(txq->ring[first_tx_done]);
mppa_pcie_time_get(priv->tx_time, &ts);
mppa_pcie_time_update(priv->tx_time, &tx->time, &ts);
/* get stats */
packets_completed++;
bytes_completed += tx->len;
first_tx_done += 1;
if (first_tx_done == tx_size)
first_tx_done = 0;
}
if (!packets_completed) {
goto out;
}
/* update stats */
netdev->stats.tx_bytes += bytes_completed;
netdev->stats.tx_packets += packets_completed;
netdev_tx_completed_queue(txq->txq, packets_completed, bytes_completed);
netif_tx_wake_queue(txq->txq);
out:
return worked;
}
static void rx_submit (struct usbnet *dev, struct urb *urb, gfp_t flags)
{
struct sk_buff *skb;
struct skb_data *entry;
int retval = 0;
unsigned long lockflags;
size_t size = dev->rx_urb_size;
#if defined(CONFIG_RA_HW_NAT_PCI) && (defined(CONFIG_RA_HW_NAT) || defined(CONFIG_RA_HW_NAT_MODULE))
if ((skb = alloc_skb (size + NET_IP_ALIGN + FOE_INFO_LEN, flags)) == NULL) {
#else
if ((skb = alloc_skb (size + NET_IP_ALIGN, flags)) == NULL) {
#endif
if (netif_msg_rx_err (dev))
devdbg (dev, "no rx skb");
usbnet_defer_kevent (dev, EVENT_RX_MEMORY);
usb_free_urb (urb);
return;
}
#if defined(CONFIG_RA_HW_NAT_PCI) && (defined(CONFIG_RA_HW_NAT) || defined(CONFIG_RA_HW_NAT_MODULE))
skb_reserve (skb, NET_IP_ALIGN + FOE_INFO_LEN);
#else
skb_reserve (skb, NET_IP_ALIGN);
#endif
entry = (struct skb_data *) skb->cb;
entry->urb = urb;
entry->dev = dev;
entry->length = 0;
usb_fill_bulk_urb (urb, dev->udev, dev->in,
skb->data, size, rx_complete, skb);
spin_lock_irqsave (&dev->rxq.lock, lockflags);
if (netif_running (dev->net)
&& netif_device_present (dev->net)
&& !test_bit (EVENT_RX_HALT, &dev->flags)) {
switch (retval = usb_submit_urb (urb, GFP_ATOMIC)){
case -EPIPE:
usbnet_defer_kevent (dev, EVENT_RX_HALT);
break;
case -ENOMEM:
usbnet_defer_kevent (dev, EVENT_RX_MEMORY);
break;
case -ENODEV:
if (netif_msg_ifdown (dev))
devdbg (dev, "device gone");
netif_device_detach (dev->net);
break;
default:
if (netif_msg_rx_err (dev))
devdbg (dev, "rx submit, %d", retval);
tasklet_schedule (&dev->bh);
break;
case 0:
__usbnet_queue_skb(&dev->rxq, skb, rx_start);
}
} else {
if (netif_msg_ifdown (dev))
devdbg (dev, "rx: stopped");
retval = -ENOLINK;
}
spin_unlock_irqrestore (&dev->rxq.lock, lockflags);
if (retval) {
dev_kfree_skb_any (skb);
usb_free_urb (urb);
}
}
/*-------------------------------------------------------------------------*/
static inline void rx_process (struct usbnet *dev, struct sk_buff *skb)
{
if (dev->driver_info->rx_fixup
&& !dev->driver_info->rx_fixup (dev, skb))
goto error;
// else network stack removes extra byte if we forced a short packet
if (skb->len)
usbnet_skb_return (dev, skb);
else {
if (netif_msg_rx_err (dev))
devdbg (dev, "drop");
error:
dev->stats.rx_errors++;
skb_queue_tail (&dev->done, skb);
}
}
/*-------------------------------------------------------------------------*/
static void rx_complete (struct urb *urb)
{
struct sk_buff *skb = (struct sk_buff *) urb->context;
struct skb_data *entry = (struct skb_data *) skb->cb;
struct usbnet *dev = entry->dev;
int urb_status = urb->status;
enum skb_state state;
skb_put (skb, urb->actual_length);
state = rx_done;
entry->urb = NULL;
switch (urb_status) {
// success
case 0:
if (skb->len < dev->net->hard_header_len) {
state = rx_cleanup;
dev->stats.rx_errors++;
dev->stats.rx_length_errors++;
if (netif_msg_rx_err (dev))
devdbg (dev, "rx length %d", skb->len);
}
break;
// stalls need manual reset. this is rare ... except that
// when going through USB 2.0 TTs, unplug appears this way.
// we avoid the highspeed version of the ETIMEOUT/EILSEQ
// storm, recovering as needed.
case -EPIPE:
dev->stats.rx_errors++;
usbnet_defer_kevent (dev, EVENT_RX_HALT);
// FALLTHROUGH
// software-driven interface shutdown
case -ECONNRESET: // async unlink
case -ESHUTDOWN: // hardware gone
if (netif_msg_ifdown (dev))
devdbg (dev, "rx shutdown, code %d", urb_status);
goto block;
// we get controller i/o faults during khubd disconnect() delays.
// throttle down resubmits, to avoid log floods; just temporarily,
// so we still recover when the fault isn't a khubd delay.
case -EPROTO:
case -ETIME:
case -EILSEQ:
dev->stats.rx_errors++;
if (!timer_pending (&dev->delay)) {
mod_timer (&dev->delay, jiffies + THROTTLE_JIFFIES);
if (netif_msg_link (dev))
devdbg (dev, "rx throttle %d", urb_status);
}
block:
state = rx_cleanup;
entry->urb = urb;
urb = NULL;
break;
// data overrun ... flush fifo?
case -EOVERFLOW:
dev->stats.rx_over_errors++;
// FALLTHROUGH
default:
state = rx_cleanup;
dev->stats.rx_errors++;
if (netif_msg_rx_err (dev))
devdbg (dev, "rx status %d", urb_status);
break;
}
state = defer_bh(dev, skb, &dev->rxq, state);
if (urb) {
if (netif_running (dev->net)
&& !test_bit (EVENT_RX_HALT, &dev->flags) &&
state != unlink_start) {
rx_submit (dev, urb, GFP_ATOMIC);
return;
}
usb_free_urb (urb);
}
if (netif_msg_rx_err (dev))
devdbg (dev, "no read resubmitted");
}
static void intr_complete (struct urb *urb)
{
struct usbnet *dev = urb->context;
int status = urb->status;
switch (status) {
/* success */
case 0:
dev->driver_info->status(dev, urb);
break;
/* software-driven interface shutdown */
case -ENOENT: // urb killed
case -ESHUTDOWN: // hardware gone
if (netif_msg_ifdown (dev))
devdbg (dev, "intr shutdown, code %d", status);
return;
/* NOTE: not throttling like RX/TX, since this endpoint
* already polls infrequently
*/
default:
devdbg (dev, "intr status %d", status);
break;
}
memset(urb->transfer_buffer, 0, urb->transfer_buffer_length);
status = usb_submit_urb (urb, GFP_ATOMIC);
if (status != 0 && netif_msg_timer (dev))
deverr(dev, "intr resubmit --> %d", status);
}
/*-------------------------------------------------------------------------*/
// unlink pending rx/tx; completion handlers do all other cleanup
static int unlink_urbs (struct usbnet *dev, struct sk_buff_head *q)
{
unsigned long flags;
struct sk_buff *skb;
int count = 0;
spin_lock_irqsave (&q->lock, flags);
while (!skb_queue_empty(q)) {
struct skb_data *entry;
struct urb *urb;
int retval;
skb_queue_walk(q, skb) {
entry = (struct skb_data *) skb->cb;
if (entry->state != unlink_start)
goto found;
}
break;
found:
entry->state = unlink_start;
urb = entry->urb;
/*
* Get reference count of the URB to avoid it to be
* freed during usb_unlink_urb, which may trigger
* use-after-free problem inside usb_unlink_urb since
* usb_unlink_urb is always racing with .complete
* handler(include defer_bh).
*/
usb_get_urb(urb);
spin_unlock_irqrestore(&q->lock, flags);
// during some PM-driven resume scenarios,
// these (async) unlinks complete immediately
retval = usb_unlink_urb (urb);
if (retval != -EINPROGRESS && retval != 0)
devdbg (dev, "unlink urb err, %d", retval);
else
count++;
usb_put_urb(urb);
spin_lock_irqsave(&q->lock, flags);
}
static void kevent(void *data)
{
struct usbnet *dev = (struct usbnet *)data;
#else
static void kevent(struct work_struct *work)
{
struct usbnet *dev =
container_of(work, struct usbnet, kevent);
#endif
int status;
/* usb_clear_halt() needs a thread context */
if (test_bit(EVENT_TX_HALT, &dev->flags)) {
unlink_urbs(dev, &dev->txq);
status = usb_clear_halt(dev->udev, dev->out);
if (status < 0
&& status != -EPIPE
&& status != -ESHUTDOWN) {
if (netif_msg_tx_err(dev))
deverr(dev, "can't clear tx halt, status %d",
status);
} else {
clear_bit(EVENT_TX_HALT, &dev->flags);
if (status != -ESHUTDOWN)
netif_wake_queue(dev->net);
}
}
if (test_bit(EVENT_RX_HALT, &dev->flags)) {
unlink_urbs(dev, &dev->rxq);
status = usb_clear_halt(dev->udev, dev->in);
if (status < 0
&& status != -EPIPE
&& status != -ESHUTDOWN) {
if (netif_msg_rx_err(dev))
deverr(dev, "can't clear rx halt, status %d",
status);
} else {
clear_bit(EVENT_RX_HALT, &dev->flags);
tasklet_schedule(&dev->bh);
}
}
/* tasklet could resubmit itself forever if memory is tight */
if (test_bit(EVENT_RX_MEMORY, &dev->flags)) {
struct urb *urb = NULL;
if (netif_running(dev->net))
urb = usb_alloc_urb(0, GFP_KERNEL);
else
clear_bit(EVENT_RX_MEMORY, &dev->flags);
if (urb != NULL) {
clear_bit(EVENT_RX_MEMORY, &dev->flags);
#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 14)
urb->transfer_flags |= URB_ASYNC_UNLINK;
#endif
rx_submit(dev, urb, GFP_KERNEL);
tasklet_schedule(&dev->bh);
}
}
if (test_bit(EVENT_LINK_RESET, &dev->flags)) {
struct driver_info *info = dev->driver_info;
int retval = 0;
clear_bit(EVENT_LINK_RESET, &dev->flags);
if (info->link_reset) {
retval = info->link_reset(dev);
if (retval < 0) {
devinfo(dev,
"link reset failed (%d) usbnet usb-%s-%s, %s",
retval,
dev->udev->bus->bus_name,
dev->udev->devpath,
info->description);
}
}
}
if (dev->flags)
devdbg(dev, "kevent done, flags = 0x%lx", dev->flags);
}
/*-------------------------------------------------------------------------*/
#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 19)
static void tx_complete(struct urb *urb, struct pt_regs *regs)
#else
static void tx_complete(struct urb *urb)
#endif
{
struct sk_buff *skb = (struct sk_buff *) urb->context;
struct skb_data *entry = (struct skb_data *) skb->cb;
struct usbnet *dev = entry->dev;
if (urb->status == 0) {
dev->stats.tx_packets++;
dev->stats.tx_bytes += entry->length;
} else {
dev->stats.tx_errors++;
switch (urb->status) {
case -EPIPE:
axusbnet_defer_kevent(dev, EVENT_TX_HALT);
break;
/* software-driven interface shutdown */
case -ECONNRESET: /* async unlink */
case -ESHUTDOWN: /* hardware gone */
break;
/* like rx, tx gets controller i/o faults during khubd delays */
/* and so it uses the same throttling mechanism. */
case -EPROTO:
case -ETIME:
case -EILSEQ:
if (!timer_pending(&dev->delay)) {
mod_timer(&dev->delay,
jiffies + THROTTLE_JIFFIES);
if (netif_msg_link(dev))
devdbg(dev, "tx throttle %d",
urb->status);
}
netif_stop_queue(dev->net);
break;
default:
if (netif_msg_tx_err(dev))
devdbg(dev, "tx err %d", entry->urb->status);
break;
}
}
urb->dev = NULL;
entry->state = tx_done;
defer_bh(dev, skb, &dev->txq);
}
/*-------------------------------------------------------------------------*/
static
void axusbnet_tx_timeout(struct net_device *net)
{
struct usbnet *dev = netdev_priv(net);
unlink_urbs(dev, &dev->txq);
tasklet_schedule(&dev->bh);
/* FIXME: device recovery -- reset? */
}
/*-------------------------------------------------------------------------*/
#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 32)
static int
#else
static netdev_tx_t
#endif
axusbnet_start_xmit(struct sk_buff *skb, struct net_device *net)
{
struct usbnet *dev = netdev_priv(net);
int length;
struct urb *urb = NULL;
struct skb_data *entry;
struct driver_info *info = dev->driver_info;
unsigned long flags;
int retval;
/* some devices want funky USB-level framing, for */
/* win32 driver (usually) and/or hardware quirks */
if (info->tx_fixup) {
skb = info->tx_fixup(dev, skb, GFP_ATOMIC);
if (!skb) {
if (netif_msg_tx_err(dev))
devdbg(dev, "can't tx_fixup skb");
goto drop;
}
}
length = skb->len;
urb = usb_alloc_urb(0, GFP_ATOMIC);
if (!urb) {
if (netif_msg_tx_err(dev))
devdbg(dev, "no urb");
goto drop;
}
entry = (struct skb_data *) skb->cb;
entry->urb = urb;
entry->dev = dev;
entry->state = tx_start;
entry->length = length;
usb_fill_bulk_urb(urb, dev->udev, dev->out, skb->data,
skb->len, tx_complete, skb);
/* don't assume the hardware handles USB_ZERO_PACKET
* NOTE: strictly conforming cdc-ether devices should expect
* the ZLP here, but ignore the one-byte packet.
*/
if (!(info->flags & FLAG_SEND_ZLP) && (length % dev->maxpacket) == 0) {
urb->transfer_buffer_length++;
if (skb_tailroom(skb)) {
skb->data[skb->len] = 0;
__skb_put(skb, 1);
}
}
spin_lock_irqsave(&dev->txq.lock, flags);
switch ((retval = usb_submit_urb(urb, GFP_ATOMIC))) {
case -EPIPE:
netif_stop_queue(net);
axusbnet_defer_kevent(dev, EVENT_TX_HALT);
break;
default:
if (netif_msg_tx_err(dev))
devdbg(dev, "tx: submit urb err %d", retval);
break;
case 0:
net->trans_start = jiffies;
__skb_queue_tail(&dev->txq, skb);
if (dev->txq.qlen >= TX_QLEN(dev))
netif_stop_queue(net);
}
spin_unlock_irqrestore(&dev->txq.lock, flags);
if (retval) {
if (netif_msg_tx_err(dev))
devdbg(dev, "drop, code %d", retval);
drop:
dev->stats.tx_dropped++;
if (skb)
dev_kfree_skb_any(skb);
usb_free_urb(urb);
} else if (netif_msg_tx_queued(dev)) {
devdbg(dev, "> tx, len %d, type 0x%x",
length, skb->protocol);
}
return NETDEV_TX_OK;
}
/*-------------------------------------------------------------------------*/
/* tasklet (work deferred from completions, in_irq) or timer */
static void axusbnet_bh(unsigned long param)
{
struct usbnet *dev = (struct usbnet *) param;
struct sk_buff *skb;
struct skb_data *entry;
while ((skb = skb_dequeue(&dev->done))) {
entry = (struct skb_data *) skb->cb;
switch (entry->state) {
case rx_done:
entry->state = rx_cleanup;
rx_process(dev, skb);
continue;
case tx_done:
case rx_cleanup:
usb_free_urb(entry->urb);
dev_kfree_skb(skb);
continue;
default:
devdbg(dev, "bogus skb state %d", entry->state);
}
}
/* waiting for all pending urbs to complete? */
if (dev->wait) {
if ((dev->txq.qlen + dev->rxq.qlen + dev->done.qlen) == 0)
wake_up(dev->wait);
/* or are we maybe short a few urbs? */
} else if (netif_running(dev->net)
&& netif_device_present(dev->net)
&& !timer_pending(&dev->delay)
&& !test_bit(EVENT_RX_HALT, &dev->flags)) {
int temp = dev->rxq.qlen;
int qlen = RX_QLEN(dev);
if (temp < qlen) {
struct urb *urb;
int i;
/* don't refill the queue all at once */
for (i = 0; i < 10 && dev->rxq.qlen < qlen; i++) {
urb = usb_alloc_urb(0, GFP_ATOMIC);
if (urb != NULL) {
#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 14)
urb->transfer_flags |= URB_ASYNC_UNLINK;
#endif
rx_submit(dev, urb, GFP_ATOMIC);
}
}
if (temp != dev->rxq.qlen && netif_msg_link(dev))
devdbg(dev, "rxqlen %d --> %d",
temp, dev->rxq.qlen);
if (dev->rxq.qlen < qlen)
tasklet_schedule(&dev->bh);
}
if (dev->txq.qlen < TX_QLEN(dev))
netif_wake_queue(dev->net);
}
}
/*-------------------------------------------------------------------------
*
* USB Device Driver support
*
*-------------------------------------------------------------------------*/
/* precondition: never called in_interrupt */
static
void axusbnet_disconnect(struct usb_interface *intf)
{
struct usbnet *dev;
struct usb_device *xdev;
struct net_device *net;
dev = usb_get_intfdata(intf);
usb_set_intfdata(intf, NULL);
if (!dev)
return;
xdev = interface_to_usbdev(intf);
if (netif_msg_probe(dev))
devinfo(dev, "unregister '%s' usb-%s-%s, %s",
intf->dev.driver->name,
xdev->bus->bus_name, xdev->devpath,
dev->driver_info->description);
net = dev->net;
unregister_netdev(net);
/* we don't hold rtnl here ... */
flush_scheduled_work();
if (dev->driver_info->unbind)
dev->driver_info->unbind(dev, intf);
free_netdev(net);
usb_put_dev(xdev);
}
/*-------------------------------------------------------------------------*/
/* precondition: never called in_interrupt */
static int
axusbnet_probe(struct usb_interface *udev, const struct usb_device_id *prod)
{
struct usbnet *dev;
struct net_device *net;
struct usb_host_interface *interface;
struct driver_info *info;
struct usb_device *xdev;
int status;
const char *name;
name = udev->dev.driver->name;
info = (struct driver_info *) prod->driver_info;
if (!info) {
printk(KERN_ERR "blacklisted by %s\n", name);
return -ENODEV;
}
xdev = interface_to_usbdev(udev);
interface = udev->cur_altsetting;
usb_get_dev(xdev);
status = -ENOMEM;
/* set up our own records */
net = alloc_etherdev(sizeof(*dev));
if (!net) {
printk(KERN_ERR "can't kmalloc dev");
goto out;
}
dev = netdev_priv(net);
dev->udev = xdev;
dev->intf = udev;
dev->driver_info = info;
dev->driver_name = name;
dev->msg_enable = netif_msg_init(msg_level, NETIF_MSG_DRV |
NETIF_MSG_PROBE | NETIF_MSG_LINK);
skb_queue_head_init(&dev->rxq);
skb_queue_head_init(&dev->txq);
skb_queue_head_init(&dev->done);
dev->bh.func = axusbnet_bh;
dev->bh.data = (unsigned long) dev;
#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 20)
INIT_WORK(&dev->kevent, kevent, dev);
#else
INIT_WORK(&dev->kevent, kevent);
#endif
dev->delay.function = axusbnet_bh;
dev->delay.data = (unsigned long) dev;
init_timer(&dev->delay);
/* mutex_init(&dev->phy_mutex); */
dev->net = net;
/* rx and tx sides can use different message sizes;
* bind() should set rx_urb_size in that case.
*/
dev->hard_mtu = net->mtu + net->hard_header_len;
#if 0
/* dma_supported() is deeply broken on almost all architectures */
/* possible with some EHCI controllers */
if (dma_supported(&udev->dev, DMA_BIT_MASK(64)))
net->features |= NETIF_F_HIGHDMA;
#endif
#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 30)
net->open = axusbnet_open,
net->stop = axusbnet_stop,
net->hard_start_xmit = axusbnet_start_xmit,
net->tx_timeout = axusbnet_tx_timeout,
net->get_stats = axusbnet_get_stats;
#endif
net->watchdog_timeo = TX_TIMEOUT_JIFFIES;
net->ethtool_ops = &axusbnet_ethtool_ops;
/* allow device-specific bind/init procedures */
/* NOTE net->name still not usable ... */
status = info->bind(dev, udev);
if (status < 0) {
deverr(dev, "Binding device failed: %d", status);
goto out1;
}
/* maybe the remote can't receive an Ethernet MTU */
if (net->mtu > (dev->hard_mtu - net->hard_header_len))
net->mtu = dev->hard_mtu - net->hard_header_len;
status = init_status(dev, udev);
if (status < 0)
goto out3;
if (!dev->rx_urb_size)
dev->rx_urb_size = dev->hard_mtu;
dev->maxpacket = usb_maxpacket(dev->udev, dev->out, 1);
SET_NETDEV_DEV(net, &udev->dev);
status = register_netdev(net);
if (status) {
deverr(dev, "net device registration failed: %d", status);
goto out3;
}
if (netif_msg_probe(dev))
devinfo(dev, "register '%s' at usb-%s-%s, %s, %pM",
udev->dev.driver->name,
xdev->bus->bus_name, xdev->devpath,
dev->driver_info->description,
net->dev_addr);
/* ok, it's ready to go. */
usb_set_intfdata(udev, dev);
/* start as if the link is up */
netif_device_attach(net);
return 0;
out3:
if (info->unbind)
info->unbind(dev, udev);
out1:
free_netdev(net);
out:
usb_put_dev(xdev);
return status;
}
/*-------------------------------------------------------------------------*/
/*
* suspend the whole driver as soon as the first interface is suspended
* resume only when the last interface is resumed
*/
static int axusbnet_suspend(struct usb_interface *intf,
#if LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 10)
pm_message_t message)
#else
u32 message)
#endif
{
struct usbnet *dev = usb_get_intfdata(intf);
if (!dev->suspend_count++) {
/*
* accelerate emptying of the rx and queues, to avoid
* having everything error out.
*/
netif_device_detach(dev->net);
(void) unlink_urbs(dev, &dev->rxq);
(void) unlink_urbs(dev, &dev->txq);
usb_kill_urb(dev->interrupt);
/*
* reattach so runtime management can use and
* wake the device
*/
netif_device_attach(dev->net);
}
return 0;
}
static int
axusbnet_resume(struct usb_interface *intf)
{
struct usbnet *dev = usb_get_intfdata(intf);
int retval = 0;
if (!--dev->suspend_count)
tasklet_schedule(&dev->bh);
retval = init_status(dev, intf);
if (retval < 0)
return retval;
if (dev->interrupt) {
retval = usb_submit_urb(dev->interrupt, GFP_KERNEL);
if (retval < 0 && netif_msg_ifup(dev))
deverr(dev, "intr submit %d", retval);
}
return retval;
}
static void rx_complete(struct urb *urb)
#endif
{
struct sk_buff *skb = (struct sk_buff *) urb->context;
struct skb_data *entry = (struct skb_data *) skb->cb;
struct usbnet *dev = entry->dev;
int urb_status = urb->status;
skb_put(skb, urb->actual_length);
entry->state = rx_done;
entry->urb = NULL;
switch (urb_status) {
/* success */
case 0:
if (skb->len < dev->net->hard_header_len) {
entry->state = rx_cleanup;
dev->stats.rx_errors++;
dev->stats.rx_length_errors++;
if (netif_msg_rx_err(dev))
devdbg(dev, "rx length %d", skb->len);
}
break;
/* stalls need manual reset. this is rare ... except that
* when going through USB 2.0 TTs, unplug appears this way.
* we avoid the highspeed version of the ETIMEDOUT/EILSEQ
* storm, recovering as needed.
*/
case -EPIPE:
dev->stats.rx_errors++;
axusbnet_defer_kevent(dev, EVENT_RX_HALT);
/* FALLTHROUGH */
/* software-driven interface shutdown */
case -ECONNRESET: /* async unlink */
case -ESHUTDOWN: /* hardware gone */
if (netif_msg_ifdown(dev))
devdbg(dev, "rx shutdown, code %d", urb_status);
goto block;
/* we get controller i/o faults during khubd disconnect() delays.
* throttle down resubmits, to avoid log floods; just temporarily,
* so we still recover when the fault isn't a khubd delay.
*/
case -EPROTO:
case -ETIME:
case -EILSEQ:
dev->stats.rx_errors++;
if (!timer_pending(&dev->delay)) {
mod_timer(&dev->delay, jiffies + THROTTLE_JIFFIES);
if (netif_msg_link(dev))
devdbg(dev, "rx throttle %d", urb_status);
}
block:
entry->state = rx_cleanup;
entry->urb = urb;
urb = NULL;
break;
/* data overrun ... flush fifo? */
case -EOVERFLOW:
dev->stats.rx_over_errors++;
/* FALLTHROUGH */
default:
entry->state = rx_cleanup;
dev->stats.rx_errors++;
if (netif_msg_rx_err(dev))
devdbg(dev, "rx status %d", urb_status);
break;
}
defer_bh(dev, skb, &dev->rxq);
if (urb) {
if (netif_running(dev->net) &&
!test_bit(EVENT_RX_HALT, &dev->flags)) {
rx_submit(dev, urb, GFP_ATOMIC);
return;
}
usb_free_urb(urb);
}
if (netif_msg_rx_err(dev))
devdbg(dev, "no read resubmitted");
}
static void ag71xx_phy_link_update(struct ag71xx *ag)
{
u32 cfg2;
u32 ifctl;
u32 pll;
u32 fifo5;
u32 mii_speed;
if (!ag->link) {
netif_carrier_off(ag->dev);
if (netif_msg_link(ag))
printk(KERN_INFO "%s: link down\n", ag->dev->name);
return;
}
cfg2 = ag71xx_rr(ag, AG71XX_REG_MAC_CFG2);
cfg2 &= ~(MAC_CFG2_IF_1000 | MAC_CFG2_IF_10_100 | MAC_CFG2_FDX);
cfg2 |= (ag->duplex) ? MAC_CFG2_FDX : 0;
ifctl = ag71xx_rr(ag, AG71XX_REG_MAC_IFCTL);
ifctl &= ~(MAC_IFCTL_SPEED);
fifo5 = ag71xx_rr(ag, AG71XX_REG_FIFO_CFG5);
fifo5 &= ~FIFO_CFG5_BYTE_PER_CLK;
switch (ag->speed) {
case SPEED_1000:
mii_speed = MII_CTRL_SPEED_1000;
cfg2 |= MAC_CFG2_IF_1000;
pll = PLL_VAL_1000;
fifo5 |= FIFO_CFG5_BYTE_PER_CLK;
break;
case SPEED_100:
mii_speed = MII_CTRL_SPEED_100;
cfg2 |= MAC_CFG2_IF_10_100;
ifctl |= MAC_IFCTL_SPEED;
pll = PLL_VAL_100;
break;
case SPEED_10:
mii_speed = MII_CTRL_SPEED_10;
cfg2 |= MAC_CFG2_IF_10_100;
pll = PLL_VAL_10;
break;
default:
BUG();
return;
}
ag71xx_wr(ag, AG71XX_REG_FIFO_CFG3, 0x008001ff);
ag71xx_set_pll(ag, pll);
ag71xx_mii_ctrl_set_speed(ag, mii_speed);
ag71xx_wr(ag, AG71XX_REG_MAC_CFG2, cfg2);
ag71xx_wr(ag, AG71XX_REG_FIFO_CFG5, fifo5);
ag71xx_wr(ag, AG71XX_REG_MAC_IFCTL, ifctl);
netif_carrier_on(ag->dev);
if (netif_msg_link(ag))
printk(KERN_INFO "%s: link up (%sMbps/%s duplex)\n",
ag->dev->name,
ag71xx_speed_str(ag),
(DUPLEX_FULL == ag->duplex) ? "Full" : "Half");
DBG("%s: fifo1=%#x, fifo2=%#x, fifo3=%#x, fifo4=%#x, fifo5=%#x\n",
ag->dev->name,
ag71xx_rr(ag, AG71XX_REG_FIFO_CFG1),
ag71xx_rr(ag, AG71XX_REG_FIFO_CFG2),
ag71xx_rr(ag, AG71XX_REG_FIFO_CFG3),
ag71xx_rr(ag, AG71XX_REG_FIFO_CFG4),
ag71xx_rr(ag, AG71XX_REG_FIFO_CFG5));
DBG("%s: mac_cfg2=%#x, ifctl=%#x, mii_ctrl=%#x\n",
ag->dev->name,
ag71xx_rr(ag, AG71XX_REG_MAC_CFG2),
ag71xx_rr(ag, AG71XX_REG_MAC_IFCTL),
ag71xx_mii_ctrl_rr(ag));
}
/**
* stmmac_adjust_link
* @dev: net device structure
* Description: it adjusts the link parameters.
*/
static void stmmac_adjust_link(struct net_device *dev)
{
struct stmmac_priv *priv = netdev_priv(dev);
struct phy_device *phydev = priv->phydev;
unsigned long flags;
int new_state = 0;
unsigned int fc = priv->flow_ctrl, pause_time = priv->pause;
if (phydev == NULL)
return;
DBG(probe, DEBUG, "stmmac_adjust_link: called. address %d link %d\n",
phydev->addr, phydev->link);
spin_lock_irqsave(&priv->lock, flags);
if (phydev->link) {
u32 ctrl = readl(priv->ioaddr + MAC_CTRL_REG);
/* Now we make sure that we can be in full duplex mode.
* If not, we operate in half-duplex mode. */
if (phydev->duplex != priv->oldduplex) {
new_state = 1;
if (!(phydev->duplex))
ctrl &= ~priv->hw->link.duplex;
else
ctrl |= priv->hw->link.duplex;
priv->oldduplex = phydev->duplex;
}
/* Flow Control operation */
if (phydev->pause)
priv->hw->mac->flow_ctrl(priv->ioaddr, phydev->duplex,
fc, pause_time);
if (phydev->speed != priv->speed) {
new_state = 1;
switch (phydev->speed) {
case 1000:
if (likely(priv->plat->has_gmac))
ctrl &= ~priv->hw->link.port;
stmmac_hw_fix_mac_speed(priv);
break;
case 100:
case 10:
if (priv->plat->has_gmac) {
ctrl |= priv->hw->link.port;
if (phydev->speed == SPEED_100) {
ctrl |= priv->hw->link.speed;
} else {
ctrl &= ~(priv->hw->link.speed);
}
} else {
ctrl &= ~priv->hw->link.port;
}
stmmac_hw_fix_mac_speed(priv);
break;
default:
if (netif_msg_link(priv))
pr_warning("%s: Speed (%d) is not 10"
" or 100!\n", dev->name, phydev->speed);
break;
}
priv->speed = phydev->speed;
}
writel(ctrl, priv->ioaddr + MAC_CTRL_REG);
if (!priv->oldlink) {
new_state = 1;
priv->oldlink = 1;
}
} else if (priv->oldlink) {
new_state = 1;
priv->oldlink = 0;
priv->speed = 0;
priv->oldduplex = -1;
}
if (new_state && netif_msg_link(priv))
phy_print_status(phydev);
spin_unlock_irqrestore(&priv->lock, flags);
DBG(probe, DEBUG, "stmmac_adjust_link: exiting\n");
}
static void tx_complete (struct urb *urb)
{
struct sk_buff *skb = (struct sk_buff *) urb->context;
struct skb_data *entry = (struct skb_data *) skb->cb;
struct usbnet *dev = entry->dev;
#ifdef TX_URB_MONITOR
unsigned char b_usb_if_num = 0;
int iRet = get_usb_interface(urb, &b_usb_if_num);
#endif //#ifdef TX_URB_MONITOR
if (urb->status == 0)
{
if (!(dev->driver_info->flags & FLAG_MULTI_PACKET))
dev->net->stats.tx_packets++;
dev->net->stats.tx_bytes += entry->length;
}
else
{
dev->net->stats.tx_errors++;
switch (urb->status)
{
case -EPIPE:
usbnet_defer_kevent (dev, EVENT_TX_HALT);
break;
/* software-driven interface shutdown */
case -ECONNRESET: // async unlink
case -ESHUTDOWN: // hardware gone
break;
// like rx, tx gets controller i/o faults during khubd delays
// and so it uses the same throttling mechanism.
case -EPROTO:
case -ETIME:
case -EILSEQ:
if (!timer_pending (&dev->delay)) {
mod_timer (&dev->delay,
jiffies + THROTTLE_JIFFIES);
if (netif_msg_link (dev))
#if (LINUX_VERSION_CODE != KERNEL_VERSION( 3,0,6 ))
devdbg (dev, "tx throttle %d",
urb->status);
#else
netif_dbg(dev, link, dev->net,
"tx throttle %d\n", urb->status);
#endif
}
netif_stop_queue (dev->net);
break;
default:
if (netif_msg_tx_err (dev))
#if (LINUX_VERSION_CODE != KERNEL_VERSION( 3,0,6 ))
devdbg (dev, "tx err %d", entry->urb->status);
#else
netif_dbg(dev, tx_err, dev->net,
"tx err %d\n", entry->urb->status);
#endif
break;
}
}
usb_autopm_put_interface_async(dev->intf);
urb->dev = NULL;
entry->state = tx_done;
defer_bh(dev, skb, &dev->txq);
#ifdef TX_URB_MONITOR
if ((URB_monitor) && (0==iRet))
{
URB_monitor(false, b_usb_if_num);
}
#endif //#ifdef TX_URB_MONITOR
}
void ag71xx_link_adjust(struct ag71xx *ag)
{
struct ag71xx_platform_data *pdata = ag71xx_get_pdata(ag);
u32 cfg2;
u32 ifctl;
u32 fifo5;
u32 mii_speed;
if (!ag->link) {
netif_carrier_off(ag->dev);
if (netif_msg_link(ag))
printk(KERN_INFO "%s: link down\n", ag->dev->name);
return;
}
cfg2 = ag71xx_rr(ag, AG71XX_REG_MAC_CFG2);
cfg2 &= ~(MAC_CFG2_IF_1000 | MAC_CFG2_IF_10_100 | MAC_CFG2_FDX);
cfg2 |= (ag->duplex) ? MAC_CFG2_FDX : 0;
ifctl = ag71xx_rr(ag, AG71XX_REG_MAC_IFCTL);
ifctl &= ~(MAC_IFCTL_SPEED);
fifo5 = ag71xx_rr(ag, AG71XX_REG_FIFO_CFG5);
fifo5 &= ~FIFO_CFG5_BM;
switch (ag->speed) {
case SPEED_1000:
mii_speed = MII_CTRL_SPEED_1000;
cfg2 |= MAC_CFG2_IF_1000;
fifo5 |= FIFO_CFG5_BM;
break;
case SPEED_100:
mii_speed = MII_CTRL_SPEED_100;
cfg2 |= MAC_CFG2_IF_10_100;
ifctl |= MAC_IFCTL_SPEED;
break;
case SPEED_10:
mii_speed = MII_CTRL_SPEED_10;
cfg2 |= MAC_CFG2_IF_10_100;
break;
default:
BUG();
return;
}
if (pdata->is_ar91xx)
ag71xx_wr(ag, AG71XX_REG_FIFO_CFG3, 0x00780fff);
else if (pdata->is_ar724x)
ag71xx_wr(ag, AG71XX_REG_FIFO_CFG3, pdata->fifo_cfg3);
else
ag71xx_wr(ag, AG71XX_REG_FIFO_CFG3, 0x008001ff);
if (pdata->set_pll)
pdata->set_pll(ag->speed);
ag71xx_mii_ctrl_set_speed(ag, mii_speed);
ag71xx_wr(ag, AG71XX_REG_MAC_CFG2, cfg2);
ag71xx_wr(ag, AG71XX_REG_FIFO_CFG5, fifo5);
ag71xx_wr(ag, AG71XX_REG_MAC_IFCTL, ifctl);
netif_carrier_on(ag->dev);
if (netif_msg_link(ag))
printk(KERN_INFO "%s: link up (%sMbps/%s duplex)\n",
ag->dev->name,
ag71xx_speed_str(ag),
(DUPLEX_FULL == ag->duplex) ? "Full" : "Half");
DBG("%s: fifo_cfg0=%#x, fifo_cfg1=%#x, fifo_cfg2=%#x\n",
ag->dev->name,
ag71xx_rr(ag, AG71XX_REG_FIFO_CFG0),
ag71xx_rr(ag, AG71XX_REG_FIFO_CFG1),
ag71xx_rr(ag, AG71XX_REG_FIFO_CFG2));
DBG("%s: fifo_cfg3=%#x, fifo_cfg4=%#x, fifo_cfg5=%#x\n",
ag->dev->name,
ag71xx_rr(ag, AG71XX_REG_FIFO_CFG3),
ag71xx_rr(ag, AG71XX_REG_FIFO_CFG4),
ag71xx_rr(ag, AG71XX_REG_FIFO_CFG5));
DBG("%s: mac_cfg2=%#x, mac_ifctl=%#x, mii_ctrl=%#x\n",
ag->dev->name,
ag71xx_rr(ag, AG71XX_REG_MAC_CFG2),
ag71xx_rr(ag, AG71XX_REG_MAC_IFCTL),
ag71xx_mii_ctrl_rr(ag));
}
static void tc_handle_link_change(struct net_device *dev)
{
struct tc35815_local *lp = netdev_priv(dev);
struct phy_device *phydev = dev->phydev;
unsigned long flags;
int status_change = 0;
spin_lock_irqsave(&lp->lock, flags);
if (phydev->link &&
(lp->speed != phydev->speed || lp->duplex != phydev->duplex)) {
struct tc35815_regs __iomem *tr =
(struct tc35815_regs __iomem *)dev->base_addr;
u32 reg;
reg = tc_readl(&tr->MAC_Ctl);
reg |= MAC_HaltReq;
tc_writel(reg, &tr->MAC_Ctl);
if (phydev->duplex == DUPLEX_FULL)
reg |= MAC_FullDup;
else
reg &= ~MAC_FullDup;
tc_writel(reg, &tr->MAC_Ctl);
reg &= ~MAC_HaltReq;
tc_writel(reg, &tr->MAC_Ctl);
/*
* TX4939 PCFG.SPEEDn bit will be changed on
* NETDEV_CHANGE event.
*/
/*
* WORKAROUND: enable LostCrS only if half duplex
* operation.
* (TX4939 does not have EnLCarr)
*/
if (phydev->duplex == DUPLEX_HALF &&
lp->chiptype != TC35815_TX4939)
tc_writel(tc_readl(&tr->Tx_Ctl) | Tx_EnLCarr,
&tr->Tx_Ctl);
lp->speed = phydev->speed;
lp->duplex = phydev->duplex;
status_change = 1;
}
if (phydev->link != lp->link) {
if (phydev->link) {
/* delayed promiscuous enabling */
if (dev->flags & IFF_PROMISC)
tc35815_set_multicast_list(dev);
} else {
lp->speed = 0;
lp->duplex = -1;
}
lp->link = phydev->link;
status_change = 1;
}
spin_unlock_irqrestore(&lp->lock, flags);
if (status_change && netif_msg_link(lp)) {
phy_print_status(phydev);
pr_debug("%s: MII BMCR %04x BMSR %04x LPA %04x\n",
dev->name,
phy_read(phydev, MII_BMCR),
phy_read(phydev, MII_BMSR),
phy_read(phydev, MII_LPA));
}
}
