/**
* Check for link state changes
*
* @v netdev Network device
* @v stat Status flags
*/
static void nii_poll_link ( struct net_device *netdev, unsigned int stat ) {
int no_media = ( stat & PXE_STATFLAGS_GET_STATUS_NO_MEDIA );
if ( no_media && netdev_link_ok ( netdev ) ) {
netdev_link_down ( netdev );
} else if ( ( ! no_media ) && ( ! netdev_link_ok ( netdev ) ) ) {
netdev_link_up ( netdev );
}
}
/**
* Update link status based on network status register
*
* @v dm96xx DM96xx device
* @v nsr Network status register
*/
static void dm96xx_link_nsr ( struct dm96xx_device *dm96xx, unsigned int nsr ) {
struct net_device *netdev = dm96xx->netdev;
if ( nsr & DM96XX_NSR_LINKST ) {
if ( ! netdev_link_ok ( netdev ) )
netdev_link_up ( netdev );
} else {
if ( netdev_link_ok ( netdev ) )
netdev_link_down ( netdev );
}
}
/**
* Check link state
*
* @v netdev Network device
*/
static void snpnet_check_link ( struct net_device *netdev ) {
struct snp_nic *snp = netdev_priv ( netdev );
EFI_SIMPLE_NETWORK_MODE *mode = snp->snp->Mode;
/* Do nothing unless media presence detection is supported */
if ( ! mode->MediaPresentSupported )
return;
/* Report any link status change */
if ( mode->MediaPresent && ( ! netdev_link_ok ( netdev ) ) ) {
netdev_link_up ( netdev );
} else if ( ( ! mode->MediaPresent ) && netdev_link_ok ( netdev ) ) {
netdev_link_down ( netdev );
}
}
/**
* Print status of network device
*
* @v netdev Network device
*/
void ifstat ( struct net_device *netdev ) {
printf ( "%s: %s on %s (%s)\n"
" [Link:%s, TX:%d TXE:%d RX:%d RXE:%d]\n",
netdev->name, netdev_addr ( netdev ), netdev->dev->name,
( netdev_is_open ( netdev ) ? "open" : "closed" ),
( netdev_link_ok ( netdev ) ? "up" : "down" ),
netdev->tx_stats.good, netdev->tx_stats.bad,
netdev->rx_stats.good, netdev->rx_stats.bad );
if ( ! netdev_link_ok ( netdev ) ) {
printf ( " [Link status: %s]\n",
strerror ( netdev->link_rc ) );
}
ifstat_errors ( &netdev->tx_stats, "TXE" );
ifstat_errors ( &netdev->rx_stats, "RXE" );
}
/**
* Check link status
*
* @v smsc95xx SMSC95xx device
* @ret rc Return status code
*/
static int smsc95xx_check_link ( struct smsc95xx_device *smsc95xx ) {
struct net_device *netdev = smsc95xx->netdev;
int intr;
int rc;
/* Read PHY interrupt source */
intr = mii_read ( &smsc95xx->mii, SMSC95XX_MII_PHY_INTR_SOURCE );
if ( intr < 0 ) {
rc = intr;
DBGC ( smsc95xx, "SMSC95XX %p could not get PHY interrupt "
"source: %s\n", smsc95xx, strerror ( rc ) );
return rc;
}
/* Acknowledge PHY interrupt */
if ( ( rc = mii_write ( &smsc95xx->mii, SMSC95XX_MII_PHY_INTR_SOURCE,
intr ) ) != 0 ) {
DBGC ( smsc95xx, "SMSC95XX %p could not acknowledge PHY "
"interrupt: %s\n", smsc95xx, strerror ( rc ) );
return rc;
}
/* Check link status */
if ( ( rc = mii_check_link ( &smsc95xx->mii, netdev ) ) != 0 ) {
DBGC ( smsc95xx, "SMSC95XX %p could not check link: %s\n",
smsc95xx, strerror ( rc ) );
return rc;
}
DBGC ( smsc95xx, "SMSC95XX %p link %s (intr %#04x)\n",
smsc95xx, ( netdev_link_ok ( netdev ) ? "up" : "down" ), intr );
return 0;
}
/**
* mii_check_link - check MII link status
* @mii: MII interface
*
* If the link status changed (previous != current), call
* netif_carrier_on() if current link status is Up or call
* netif_carrier_off() if current link status is Down.
*/
void mii_check_link(struct mii_if_info *mii)
{
#warning "figure out what to do about etherboot netdev; does ours work?"
#if 0
int cur_link = mii_link_ok(mii);
int prev_link = netdev_link_ok(mii->dev);
if (cur_link && !prev_link)
netdev_link_up(mii->dev);
else if (prev_link && !cur_link)
netdev_link_down(mii->dev);
#endif
}
/**
* Wait for link-up, with status indication
*
* @v netdev Network device
* @v max_wait_ms Maximum time to wait, in ms
*/
int iflinkwait ( struct net_device *netdev, unsigned int max_wait_ms ) {
int key;
int rc;
if ( netdev_link_ok ( netdev ) )
return 0;
printf ( "Waiting for link-up on %s...", netdev->name );
while ( 1 ) {
if ( netdev_link_ok ( netdev ) ) {
rc = 0;
break;
}
if ( max_wait_ms-- == 0 ) {
rc = netdev->link_rc;
break;
}
step();
if ( iskey() ) {
key = getchar();
if ( key == CTRL_C ) {
rc = -ECANCELED;
break;
}
}
mdelay ( 1 );
}
if ( rc == 0 ) {
printf ( " ok\n" );
} else {
printf ( " failed: %s\n", strerror ( rc ) );
}
return rc;
}
/**
* vxge_xmit
* @skb : the socket buffer containing the Tx data.
* @dev : device pointer.
*
* This function is the Tx entry point of the driver. Neterion NIC supports
* certain protocol assist features on Tx side, namely CSO, S/G, LSO.
*/
static int
vxge_xmit(struct net_device *dev, struct io_buffer *iobuf)
{
struct vxge_fifo *fifo = NULL;
struct vxgedev *vdev = NULL;
struct __vxge_hw_fifo *fifoh;
struct vxge_hw_fifo_txd *txdp;
vxge_trace();
vdev = (struct vxgedev *)netdev_priv(dev);
if (!is_vxge_card_up(vdev)) {
vxge_debug(VXGE_ERR,
"%s: vdev not initialized\n", dev->name);
return -EIO;
}
if (!netdev_link_ok(dev)) {
vxge_debug(VXGE_ERR,
"%s: Link down, transmit failed\n", dev->name);
return -ENETDOWN;
}
fifo = &vdev->vpath.fifo;
fifoh = fifo->fifoh;
txdp = vxge_hw_fifo_free_txdl_get(fifoh);
if (!txdp) {
vxge_debug(VXGE_ERR,
"%s: Out of tx descriptors\n", dev->name);
return -ENOBUFS;
}
vxge_debug(VXGE_XMIT, "%s: %s:%d fifoh offset= %d\n",
dev->name, __func__, __LINE__, fifoh->sw_offset);
vxge_hw_fifo_txdl_buffer_set(fifoh, txdp, iobuf);
vxge_hw_fifo_txdl_post(fifoh, txdp);
return 0;
}
/**
* Set EFI SNP mode based on iPXE net device parameters
*
* @v snp SNP interface
*/
static void efi_snp_set_mode ( struct efi_snp_device *snpdev ) {
struct net_device *netdev = snpdev->netdev;
EFI_SIMPLE_NETWORK_MODE *mode = &snpdev->mode;
struct ll_protocol *ll_protocol = netdev->ll_protocol;
unsigned int ll_addr_len = ll_protocol->ll_addr_len;
mode->HwAddressSize = ll_addr_len;
mode->MediaHeaderSize = ll_protocol->ll_header_len;
mode->MaxPacketSize = netdev->max_pkt_len;
mode->ReceiveFilterMask = ( EFI_SIMPLE_NETWORK_RECEIVE_UNICAST |
EFI_SIMPLE_NETWORK_RECEIVE_MULTICAST |
EFI_SIMPLE_NETWORK_RECEIVE_BROADCAST );
assert ( ll_addr_len <= sizeof ( mode->CurrentAddress ) );
memcpy ( &mode->CurrentAddress, netdev->ll_addr, ll_addr_len );
memcpy ( &mode->BroadcastAddress, netdev->ll_broadcast, ll_addr_len );
ll_protocol->init_addr ( netdev->hw_addr, &mode->PermanentAddress );
mode->IfType = ntohs ( ll_protocol->ll_proto );
mode->MacAddressChangeable = TRUE;
mode->MediaPresentSupported = TRUE;
mode->MediaPresent = ( netdev_link_ok ( netdev ) ? TRUE : FALSE );
}