/**
* 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;
}
/**
* Set station address
*
* @v nii NII NIC
* @v netdev Network device
* @ret rc Return status code
*/
static int nii_set_station_address ( struct nii_nic *nii,
struct net_device *netdev ) {
uint32_t implementation = nii->undi->Implementation;
PXE_CPB_STATION_ADDRESS cpb;
unsigned int op;
int stat;
int rc;
/* Fail if setting station address is unsupported */
if ( ! ( implementation & PXE_ROMID_IMP_STATION_ADDR_SETTABLE ) )
return -ENOTSUP;
/* Construct parameter block */
memset ( &cpb, 0, sizeof ( cpb ) );
memcpy ( cpb.StationAddr, netdev->ll_addr,
netdev->ll_protocol->ll_addr_len );
/* Issue command */
op = NII_OP ( PXE_OPCODE_STATION_ADDRESS,
PXE_OPFLAGS_STATION_ADDRESS_WRITE );
if ( ( stat = nii_issue_cpb ( nii, op, &cpb, sizeof ( cpb ) ) ) < 0 ) {
rc = -EIO_STAT ( stat );
DBGC ( nii, "NII %s could not set station address: %s\n",
nii->dev.name, strerror ( rc ) );
return rc;
}
return 0;
}
/**
* Set station address
*
* @v nii NII NIC
* @v netdev Network device
* @ret rc Return status code
*/
static int nii_set_station_address ( struct nii_nic *nii,
struct net_device *netdev ) {
PXE_CPB_STATION_ADDRESS cpb;
int stat;
int rc;
/* Construct parameter block */
memset ( &cpb, 0, sizeof ( cpb ) );
memcpy ( cpb.StationAddr, netdev->ll_addr,
netdev->ll_protocol->ll_addr_len );
/* Issue command */
if ( ( stat = nii_issue_cpb ( nii, PXE_OPCODE_STATION_ADDRESS,
&cpb, sizeof ( cpb ) ) ) < 0 ) {
rc = -EIO_STAT ( stat );
DBGC ( nii, "NII %s could not set station address: %s\n",
nii->dev.name, strerror ( rc ) );
return rc;
}
return 0;
}
/**
* Start UNDI
*
* @v nii NII NIC
* @ret rc Return status code
*/
static int nii_start_undi ( struct nii_nic *nii ) {
PXE_CPB_START_31 cpb;
int stat;
int rc;
/* Construct parameter block */
memset ( &cpb, 0, sizeof ( cpb ) );
cpb.Delay = ( ( intptr_t ) nii_delay );
cpb.Block = ( ( intptr_t ) nii_block );
cpb.Mem_IO = ( ( intptr_t ) nii_io );
cpb.Unique_ID = ( ( intptr_t ) nii );
/* Issue command */
if ( ( stat = nii_issue_cpb ( nii, PXE_OPCODE_START, &cpb,
sizeof ( cpb ) ) ) < 0 ) {
rc = -EIO_STAT ( stat );
DBGC ( nii, "NII %s could not start: %s\n",
nii->dev.name, strerror ( rc ) );
return rc;
}
return 0;
}
