void mlx4_en_calc_rx_buf(struct net_device *dev)
{
struct mlx4_en_priv *priv = netdev_priv(dev);
int eff_mtu = dev->if_mtu + ETHER_HDR_LEN + ETHER_VLAN_ENCAP_LEN + ETH_LLC_SNAP_SIZE;
int buf_size = 0;
int i, frag;
for (i = 0, frag = 0; buf_size < eff_mtu; frag++, i++) {
/*
* Allocate small to large but only as much as is needed for
* the tail.
*/
while (i > 0 && eff_mtu - buf_size <= frag_sizes[i - 1])
i--;
priv->frag_info[frag].frag_size = frag_sizes[i];
priv->frag_info[frag].frag_prefix_size = buf_size;
buf_size += priv->frag_info[frag].frag_size;
}
priv->num_frags = frag;
priv->rx_mb_size = eff_mtu;
priv->log_rx_info =
ROUNDUP_LOG2(priv->num_frags * sizeof(struct mbuf *));
en_dbg(DRV, priv, "Rx buffer scatter-list (effective-mtu:%d "
"num_frags:%d):\n", eff_mtu, priv->num_frags);
for (i = 0; i < priv->num_frags; i++) {
en_dbg(DRV, priv, " frag:%d - size:%d prefix:%d\n", i,
priv->frag_info[i].frag_size,
priv->frag_info[i].frag_prefix_size)
}
}
void vnic_calc_rx_buf(struct vnic_rx_ring *ring)
{
int eff_mtu = VNIC_BUF_SIZE(ring->port), buf_size = 0, i = 0;
if (vnic_rx_linear) {
ring->num_frags = 1;
return;
}
while (buf_size < eff_mtu) {
ring->frag_info[i].frag_size =
(eff_mtu > buf_size + frag_sizes[i]) ?
frag_sizes[i] : eff_mtu - buf_size;
ring->frag_info[i].frag_prefix_size = buf_size;
if (!i) {
ring->frag_info[i].frag_align = NET_IP_ALIGN;
ring->frag_info[i].frag_stride =
ALIGN(frag_sizes[i] + NET_IP_ALIGN, SMP_CACHE_BYTES);
} else {
ring->frag_info[i].frag_align = 0;
ring->frag_info[i].frag_stride =
ALIGN(frag_sizes[i], SMP_CACHE_BYTES);
}
ring->frag_info[i].last_offset =
vnic_last_alloc_offset(ring,
ring->frag_info[i].frag_stride,
ring->frag_info[i].frag_align);
buf_size += ring->frag_info[i].frag_size;
i++;
}
ring->num_frags = i;
ring->rx_skb_size = eff_mtu;
ring->log_rx_info = ROUNDUP_LOG2(i * sizeof(struct skb_frag_struct));
vnic_dbg(ring->port->name, "Rx buffer scatter-list (ring %d effective-mtu:%d "
"num_frags:%d):\n", ring->index ,eff_mtu, ring->num_frags);
for (i = 0; i < ring->num_frags; i++) {
vnic_dbg(ring->port->name, "frag:%d - size:%d prefix:%d align:%d "
"stride:%d last_offset:%d\n", i,
ring->frag_info[i].frag_size,
ring->frag_info[i].frag_prefix_size,
ring->frag_info[i].frag_align,
ring->frag_info[i].frag_stride,
ring->frag_info[i].last_offset);
}
}
void mlx4_en_calc_rx_buf(struct net_device *dev)
{
struct mlx4_en_priv *priv = netdev_priv(dev);
int eff_mtu = dev->mtu + ETH_HLEN + VLAN_HLEN + ETH_LLC_SNAP_SIZE;
int buf_size = 0;
int i = 0;
while (buf_size < eff_mtu) {
priv->frag_info[i].frag_size =
(eff_mtu > buf_size + frag_sizes[i]) ?
frag_sizes[i] : eff_mtu - buf_size;
priv->frag_info[i].frag_prefix_size = buf_size;
if (!i) {
priv->frag_info[i].frag_align = NET_IP_ALIGN;
priv->frag_info[i].frag_stride =
ALIGN(frag_sizes[i] + NET_IP_ALIGN, SMP_CACHE_BYTES);
} else {
priv->frag_info[i].frag_align = 0;
priv->frag_info[i].frag_stride =
ALIGN(frag_sizes[i], SMP_CACHE_BYTES);
}
priv->frag_info[i].last_offset = mlx4_en_last_alloc_offset(
priv, priv->frag_info[i].frag_stride,
priv->frag_info[i].frag_align);
buf_size += priv->frag_info[i].frag_size;
i++;
}
priv->num_frags = i;
priv->rx_skb_size = eff_mtu;
priv->log_rx_info = ROUNDUP_LOG2(i * sizeof(struct skb_frag_struct));
en_dbg(DRV, priv, "Rx buffer scatter-list (effective-mtu:%d "
"num_frags:%d):\n", eff_mtu, priv->num_frags);
for (i = 0; i < priv->num_frags; i++) {
en_dbg(DRV, priv, " frag:%d - size:%d prefix:%d align:%d "
"stride:%d last_offset:%d\n", i,
priv->frag_info[i].frag_size,
priv->frag_info[i].frag_prefix_size,
priv->frag_info[i].frag_align,
priv->frag_info[i].frag_stride,
priv->frag_info[i].last_offset);
}
}
