/* Write a SDMA descriptor to memory */
static void mv64460_sdma_desc_write(struct mv64460_data *d,m_uint32_t addr,
struct sdma_desc *desc)
{
struct sdma_desc tmp;
/* byte-swapping */
tmp.cmd_stat = vmtoh32(desc->cmd_stat);
tmp.buf_size = vmtoh32(desc->buf_size);
tmp.next_ptr = vmtoh32(desc->next_ptr);
tmp.buf_ptr = vmtoh32(desc->buf_ptr);
physmem_copy_to_vm(d->vm,&tmp,addr,sizeof(struct sdma_desc));
}
/* Put a packet in buffer of a descriptor */
static void mv64460_sdma_rxdesc_put_pkt(struct mv64460_data *d,
struct sdma_desc *rxd,
u_char **pkt,ssize_t *pkt_len)
{
ssize_t len,cp_len;
len = (rxd->buf_size & MV64460_RXDESC_BS_MASK) >> MV64460_RXDESC_BS_SHIFT;
/* compute the data length to copy */
cp_len = m_min(len,*pkt_len);
/* copy packet data to the VM physical RAM */
physmem_copy_to_vm(d->vm,*pkt,rxd->buf_ptr,cp_len);
/* set the byte count in descriptor */
rxd->buf_size |= cp_len;
*pkt += cp_len;
*pkt_len -= cp_len;
}
/* Put a packet in buffer of a descriptor */
static ssize_t rxdesc_put_pkt(struct pos_oc3_data *d,struct rx_desc *rxd,
u_char **pkt,ssize_t *pkt_len)
{
ssize_t len,cp_len;
len = rxd->rdes[0] & POS_OC3_RXDESC_LEN_MASK;
/* compute the data length to copy */
cp_len = m_min(len,*pkt_len);
#if DEBUG_RECEIVE
POS_LOG(d,"copying %d bytes at 0x%x\n",cp_len,rxd->rdes[1]);
#endif
/* copy packet data to the VM physical RAM */
physmem_copy_to_vm(d->vm,*pkt,rxd->rdes[1],cp_len);
*pkt += cp_len;
*pkt_len -= cp_len;
return(cp_len);
}