/**
* Transmit packet
*
* @v netdev Network device
* @v iobuf I/O buffer
* @ret rc Return status code
*/
static int snpnet_transmit ( struct net_device *netdev,
struct io_buffer *iobuf ) {
struct snp_nic *snp = netdev_priv ( netdev );
EFI_STATUS efirc;
int rc;
/* Defer the packet if there is already a transmission in progress */
if ( snp->txbuf ) {
netdev_tx_defer ( netdev, iobuf );
return 0;
}
/* Transmit packet */
if ( ( efirc = snp->snp->Transmit ( snp->snp, 0, iob_len ( iobuf ),
iobuf->data, NULL, NULL,
NULL ) ) != 0 ) {
rc = -EEFI ( efirc );
DBGC ( snp, "SNP %s could not transmit: %s\n",
netdev->name, strerror ( rc ) );
return rc;
}
snp->txbuf = iobuf;
return 0;
}
/**
* Transmit packet
*
* @v netdev Network device
* @v iobuf I/O buffer
* @ret rc Return status code
*/
static int nii_transmit ( struct net_device *netdev,
struct io_buffer *iobuf ) {
struct nii_nic *nii = netdev->priv;
PXE_CPB_TRANSMIT cpb;
int stat;
int rc;
/* Defer the packet if there is already a transmission in progress */
if ( nii->txbuf ) {
netdev_tx_defer ( netdev, iobuf );
return 0;
}
/* Construct parameter block */
memset ( &cpb, 0, sizeof ( cpb ) );
cpb.FrameAddr = virt_to_bus ( iobuf->data );
cpb.DataLen = iob_len ( iobuf );
cpb.MediaheaderLen = netdev->ll_protocol->ll_header_len;
/* Transmit packet */
if ( ( stat = nii_issue_cpb ( nii, PXE_OPCODE_TRANSMIT, &cpb,
sizeof ( cpb ) ) ) < 0 ) {
rc = -EIO_STAT ( stat );
DBGC ( nii, "NII %s could not transmit: %s\n",
nii->dev.name, strerror ( rc ) );
return rc;
}
nii->txbuf = iobuf;
return 0;
}
